JP2011027919A - Housing structure for electronic keyboard musical instrument - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a housing structure for an electronic keyboard musical instrument, which ensures both sufficient rigidness and secure fixing of an upper case, with a simple structure in which the number of components are reduced. <P>SOLUTION: The housing structure for the electronic keyboard musical instrument 1 includes: a lower case 3 including a bottom plate 7; an upper case 2 for covering an upper face side and a rear face side of a rear end section 10a of a keyboard 10; and a pair of side face cases 4 and 4. The upper case 2 composed of a front panel member 20 in a front side, and a rear panel member 60 which is connected to the rear end 32 of the panel member 20 in the same face, includes a reinforcement member 90 mounted over the front panel member 20 and the rear panel member 60, in a lower face side at a middle position in a longitudinal direction of the upper case 2. The reinforcement member 90 integrally fixes the front and the rear panel members 20 and 60 at an upper end section 91, and integrally fixes the upper case 2 and the lower case 3, as the lower end section 93 is fixed to the bottom plate 7 of the lower case 3. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a housing structure for an electronic keyboard instrument such as an electronic piano or an electronic organ.

  In an electronic keyboard instrument such as an electronic piano or an electronic organ, for example, as shown in Patent Document 1, a lower case having a bottom plate covering a lower surface side of a keyboard on which a plurality of keys are arranged, and an upper surface of a rear end portion of the keyboard Some cases have a housing structure composed of an upper case covering the side and the rear surface side, and a pair of side cases covering both side surfaces in the key arrangement direction. In such a housing structure, there is a case where the upper surface of the upper case is a panel surface on which operators such as switches and volumes are arranged. This panel surface is composed of a flat plate-like member arranged on the upper surface side of the rear end portion of the keyboard.

  In the case structure as described above, as described in Patent Document 2, a member (a coupling holding plate) for fixing the longitudinal middle portion of the upper case to the lower case is performed. Yes. This member is a plate-like member erected vertically so as to be orthogonal to the longitudinal direction of the upper case. The roof plate portion covers the upper surface side of the rear end portion of the keyboard in the upper case, and the rear plate portion covers the rear surface side. And is fixed to the lower case, and the upper case is fixed to the lower case.

  On the other hand, if you want to give a high-class appearance to the appearance of the electronic keyboard instrument, or if you want to increase the variation of the appearance of the electronic keyboard instrument while sharing some members with multiple models, As shown in Patent Document 3, it is effective to employ a configuration in which a plurality of plate members are arranged in a plane direction and connected to form a single plate. That is, in the panel structure shown in Patent Document 2, a front panel and a rear panel are arranged side by side and connected to form a flat panel surface. The connection points of the front and rear panels are overlapped with the edges of the front and rear panels, and fastened and fixed with screws. In addition, the front and rear panels are made of the same material (both aluminum), but the texture of the front and rear panels is changed by making the surface treatments different from each other.

  Here, in the upper case described in Patent Document 2, since the rear side of the roof plate portion (corresponding to the panel surface) is connected to the upper end side of the back plate portion, it is the middle in the longitudinal direction of the roof plate portion. Even if a load was applied to the position from above, it was not easily bent. However, like the upper case described in Patent Document 3, when one panel surface is configured by connecting a plurality of plate members arranged in the surface direction, the connection portion of the panel surface is easily bent by a load from above. There's a problem. Therefore, in addition to the structure for fixing the upper case, it is desirable to secure the rigidity of the panel surface against the load from above by further providing a structure for reinforcing the connection part of the panel surface of the upper case.

  In this way, when the panel surface of the upper case has a structure in which a plurality of plate members are arranged and connected, in order to increase the rigidity of the housing, a structure for reinforcing the connection portion of the upper case and the upper case to the lower case are used. Both the structure and the structure for fixing to the housing are necessary, and there is a possibility that the number of parts of the housing structure increases, the assembly process becomes complicated, and the cost increases. In the case structure disclosed in Patent Document 2, the roof plate portion corresponding to the panel surface is formed of a single plate, and the roof plate portion is connected to the back plate portion integrally. Accordingly, some conventional keyboard structures for electronic keyboard instruments have a structure for fixing an upper case made of a single plate material. None had a structure that could effectively both fix the case.

JP 2008-164778 A Japanese Patent No. 4162031 JP 2000-112476 A

  The present invention has been made in view of the above-described points, and an object thereof is to ensure sufficient rigidity against bending of the upper case in a casing structure of an electronic keyboard instrument having an upper case configured to connect a plurality of plate members. It is to realize both the fixing of the upper case and the upper case with a simple structure with a reduced number of parts.

  The present invention for solving the above problems includes a lower case (3) having a bottom plate (7) installed on the lower surface side of the keyboard (10), an upper surface side of the rear end portion (10a) of the keyboard (10), and In the casing structure of an electronic keyboard instrument, which is composed of an upper case (2) covering the back side and a pair of side cases (4, 4) covering both sides of the keyboard (10), the upper case (2) A first upper surface member (20) covering the upper surface side of the rear end portion (10a) of the keyboard (10) and a rear side of the first upper surface member (20) arranged side by side in the surface direction and connected to the rear of the keyboard (10) A second upper surface member (60) covering the upper surface side and the rear surface side of the end portion (10a), and on the lower surface side of the upper case (20) at an intermediate position away from the pair of side surface cases (4, 4), Reinforcing member (90) is provided across the first upper surface member (20) and the second upper surface member (60). The reinforcing member (90) integrally fixes the first upper surface member (20) and the second upper surface member (60) of the upper case (2) at the upper end portion (91), and the lower end portion ( 93) is fixed to the bottom plate (7) of the lower case (3), whereby the upper case (2) and the lower case (3) are fixed integrally.

  In the case of an electronic keyboard instrument housing structure, when it has an upper case in which the first upper surface member and the second upper surface member are arranged side by side and connected, the upper case as in the case structure of the electronic keyboard instrument according to the present invention. In order to connect or reinforce these connection locations, it is preferable to provide a reinforcing member attached across the first upper surface member and the second upper surface member on the lower surface side of the upper case at an intermediate position away from the pair of side surface cases. In addition, in the case structure of the electronic keyboard instrument according to the present invention, the first upper surface member and the second upper surface member of the upper case are fixed integrally with the reinforcing member, and the upper case and the lower case are integrated with the same reinforcing member. It was fixed to. That is, the three members including the first upper surface member of the upper case, the second upper surface member, and the bottom plate of the lower case are integrally fixed with one reinforcing member. As a result, it has a simple structure with a reduced number of parts, but it can secure both rigidity against bending of the upper case, which is formed by connecting multiple plates together, and can firmly fix the upper case and the lower case. Therefore, the bending of the upper case and the distortion between the upper and lower cases can be effectively prevented, and the housing structure can be made robust.

  In the case structure described above, the reinforcing member (90) includes the upper fixing piece (91) fixed to the lower surface side of the first and second upper surface members (20, 60), and the upper fixing piece (91). A flat plate-like standing wall portion (92) projecting downward from the lower surface of the plate and extending toward the lower case (3), and projecting in a transverse direction perpendicular to the lower end of the standing wall portion (92) and fixed to the bottom plate (7). A lower fixed piece (93), and a standing wall portion (92) includes a laterally extending portion (92a) extending backward from the front end of the upper case (2), and a lower portion from the rear portion of the laterally extending portion (92a). The upper case (2) to which the reinforcing member (90) is attached is assembled to the lower case (3) to form the reinforcing member (92b). 90) the laterally extended portion (92a) is arranged directly above the rear end (10a) of the keyboard (10). It is good to make it.

  According to this, sufficient rigidity of the front end side of the upper case covering (overlapping) the upper surface side of the rear end portion of the keyboard can be ensured by the laterally extending portion of the reinforcing member. As described above, the laterally extending portion of the reinforcing member is arranged directly above the rear end of the keyboard, so that even when a load is applied to the front end of the upper case, the upper case bends and the rear of the keyboard It can prevent effectively contact | abutting to an edge part. In particular, when a panel surface (control panel) on which an operator such as a switch is arranged on the upper case, a load is applied to the upper case from the upper surface side by the operation of the operator arranged on the panel surface. It becomes possible to prevent the front end side of the upper case from being bent.

  In the case structure described above, the upper case (2) is configured such that the connecting portion (67) provided at the rear end (66) is rotatably connected to the lower case (3). The upper case (2) to which the reinforcing member (90) is attached rotates from the top to the bottom with the connecting portion (67) as a fulcrum, so that the upper case (2) is connected to the rear end of the keyboard (10) ( 10a) may be covered from above, and the lower fixing piece (93) of the reinforcing member (90) may come into contact with the bottom plate (7) of the lower case (3).

  According to this, it is possible to cover the upper case on the rear end portion of the keyboard from above only by rotating the upper case to which the reinforcing member is attached from above, and the lower fixing piece of the reinforcing member is attached to the lower case. It can be installed in contact with the bottom plate. Accordingly, both the installation of the upper case and the installation of the reinforcing member can be performed by only one operation of rotating the upper case from the upper side to the lower side, so that the upper case can be assembled in a small number of steps. Therefore, simplification of the assembly process of the housing can be achieved.

Moreover, when providing said reinforcement member, boards, such as a circuit board (50) installed ranging over a 1st upper surface member (20) and a 2nd upper surface member (60) on the lower surface side of an upper case (2). Can be installed. That is, by attaching the reinforcing member, it is possible to prevent the upper case formed by connecting the first upper surface member and the second upper surface member side by side, so that bending can be prevented. It becomes possible to mount the member straddling the member and the second upper surface member. Thereby, the space on the lower surface side of the upper case can be effectively utilized.
In addition, the code | symbol in said parenthesis shows the code | symbol of the corresponding component of embodiment mentioned later as an example of this invention.

  According to the present invention, in a case structure of an electronic keyboard instrument having an upper case with a configuration in which a plurality of plate members are connected side by side, with a simple structure with a reduced number of parts, sufficient rigidity against bending of the upper case is ensured. Both the upper case and the fixed case can be securely fixed.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing an overall configuration of an electronic keyboard instrument having a housing structure according to an embodiment of the present invention, and shows a state in which an upper case is closed. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing an overall configuration of an electronic keyboard instrument provided with a housing structure according to an embodiment of the present invention, and shows a state where an upper case is opened. It is a schematic sectional side view which shows the front panel member and rear panel member of an upper case. It is a figure which shows a front panel member and a rear panel member, (a) is a bottom view of a front panel member, (b) is a front view of a rear panel member, (c) is a bottom view of a rear panel member, (d ) Is an enlarged view of part C of (b). It is a figure which shows a reinforcement member, (a) is a side view, (b) is a bottom view. It is a figure which shows the state which connected the front panel member and rear panel member of the upper case, (a) is a sectional side view of an upper case, (b) is the figure which looked at a part of upper case from the lower surface side. . It is a figure which shows the state which attached the reinforcement member to the lower surface side of the upper case, (a) is a sectional side view of an upper case, (b) is the figure which looked at a part of upper case from the lower surface side. It is a figure which shows the state which attached the circuit board to the lower surface side of the upper case, (a) is a sectional side view of an upper case, (b) is the figure which looked at a part of upper case from the lower surface side. It is a figure for demonstrating the procedure which attaches an upper case to a lower case, and is a figure which shows the state which opened the upper case. It is a figure for demonstrating the procedure which attaches an upper case to a lower case, and is a figure which shows the state which closed the upper case.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. 1 and 2 are perspective views showing an overall configuration of an electronic keyboard instrument having a housing structure according to an embodiment of the present invention. FIG. 1 shows a state in which an upper case 2 described later is closed, FIG. Shows a state in which the upper case 2 is opened. The electronic keyboard instrument 1 shown in these drawings includes a keyboard 10 in which a plurality of keys 11 (white keys 11a and black keys 11b) are arranged. Further, as a housing structure that accommodates the keyboard 10 and forms the exterior of the electronic keyboard instrument 1, the lower case 3 installed on the lower surface side of the keyboard 10 and the upper surface side and the rear surface side of the rear end portion 10a of the keyboard 10 are covered. An upper case 2 and a pair of side cases 4 and 4 that cover the left and right side surfaces of the keyboard 10 are provided. Note that the time signatures 5 and 5 are provided outside the both ends of the keyboard 10. The upper case 2 and the lower case 3 are made of a substantially plate-like member that extends along the arrangement direction of the keys 11. The upper case 2 includes a front panel member (first upper surface member) 20 disposed on the near side on the upper surface side of the rear end portion 10a of the keyboard 10 and a rear panel member (second upper surface member) 60 disposed on the rear side. Are arranged side by side in the same plane. Then, as shown in FIG. 2, the upper case 2 separated from the pair of side cases 4, 4 is attached to the lower surface side at the intermediate position in the longitudinal direction across the front panel member 20 and the rear panel member 60. A reinforcing member 90 is installed. Hereinafter, the housing structure composed of the above-described members will be described in detail. In the description of the present embodiment, the horizontal direction indicates the arrangement direction of the keys 11 in the electronic keyboard instrument 1, and the front-rear direction or the near side and the rear side indicate the longitudinal direction of each key 11.

  FIG. 3 is a schematic sectional side view showing the front panel member 20 and the rear panel member 60 of the upper case 2. 4A and 4B are diagrams showing the front panel member 20 and the rear panel member 60, where FIG. 4A is a bottom view of the front panel member 20, FIG. 4B is a front view of the rear panel member 60, and FIG. FIG. 4B is a bottom view of the rear panel member 60, and FIG. The front panel member 20 is an aluminum extrusion-molded product, and as shown in FIG. 2, an upper wall 21 disposed in a substantially horizontal plane so as to cover the upper part of the rear end portion 10a of the keyboard 10, and the upper wall 21 has a front wall 22 that extends downward from the front end side of the keyboard 21 and stands above the rear end portion 10a of the keyboard 10, and has a substantially L-shaped cross section. The upper surface of the upper wall 21 is a substantially horizontal front panel surface 31.

  On the other hand, a linear first rail portion 23 and a second rail portion 26 extending in the arrangement direction of the keys 11 are formed on the lower surface side 21 a of the upper wall 21. The first rail portion 23 has two protrusions 24 and 25 parallel to each other at a predetermined interval formed at a position along the front end side 21e of the upper wall 21 (position immediately after the front wall 22). The two rail portions 26 have two ridges 27 and 28 that are formed at positions along the rear end side 21f of the upper wall 21 and are parallel to each other at a predetermined interval. The protrusions 24, 25, 27, and 28 of the first rail portion 23 and the second rail portion 26 have substantially the same projecting dimensions from the upper wall 21 to the lower surface side 21 a. Is a slightly smaller protruding dimension.

  The outer surface of the outer protrusion 28 of the second rail portion 26 is a joint surface 32 for connecting the front panel member 20 to the rear panel member 60. The joint surface 32 extends in a direction substantially orthogonal to the front panel surface 31 on the lower surface side 31 a of the front panel surface 31. Further, the joint surface 32 extends in the arrangement direction of the keys 11 along the protrusion 28. And the protrusion piece 33 which protrudes substantially horizontal toward back from the joint surface 32 is formed. The projecting piece 33 is provided at a position away from the front panel surface 31 on the joint surface 32, and is formed of a substantially rectangular small tongue piece whose surface is arranged in parallel with the front panel surface 31. A plurality of the protruding pieces 33 are provided at predetermined intervals along the longitudinal direction of the joining surface 32. Each protruding piece 33 is formed with a screw hole 33 a for fixing a fixing screw (fixing tool) 41.

  As shown in FIG. 1, an opening 21 c for installing various operation switches for use in the operation of the electronic keyboard instrument 1 and an operator 6 such as a volume is formed in the upper wall 21 of the front panel member 20. Has been. The operation element 6 is mounted on a circuit board 50 (see FIG. 8) attached to the lower surface side 21a of the upper wall 21, and is exposed to the front panel surface 31 from the opening 21c of the upper wall 21. Yes.

  On the other hand, the rear panel member 60 is a plate-like member formed by appropriately bending an iron sheet metal, and has a substantially horizontal upper wall 61 continuous with the rear end side 21f of the upper wall 21 of the front panel member 20, And a rear wall 62 that extends downward from the rear end side of the upper wall 61 and covers the rear side of the electronic keyboard instrument 1, and has a cross-sectional shape that is substantially L-shaped laterally symmetrical with respect to the front panel member 20. Is formed. The upper surface of the upper wall 61 is a substantially horizontal rear panel surface 71. Further, a bent wall 63 that is bent substantially perpendicularly toward the lower surface side 71a is connected to the front end side 71e of the upper wall 61. The outer surface of the bent wall 63 is a joint surface 72 for connecting the rear panel member 60 to the front panel member 20. The joint surface 72 extends in a direction substantially orthogonal to the rear panel surface 71 on the lower surface side 61a of the rear panel surface 71 (upper wall 61). Further, the joint surface 72 extends in the arrangement direction of the keys 11 that is the extending direction of the upper wall 61. The joining surface 72 has an insertion portion 73 formed of a substantially rectangular opening. The insertion portion 73 is a slit-like opening for inserting the protruding piece 33 of the front panel member 20, and a plurality of insertion portions 73 are provided at positions corresponding to the protruding piece 33 along the longitudinal direction of the joint surface 72.

  Further, a lower wall 64 bent at a substantially right angle toward the rear side is connected to the lower end side of the bent wall 63. The lower wall 64 extends along the lower end side of the bent wall 63 in a substantially horizontal direction whose surface is parallel to the upper wall 61. The upper surface of the lower wall 64 at a position corresponding to the insertion portion 73 is a fixing surface 74 for fixing the protruding piece 33 inserted into the insertion portion 73 in a surface contact state. An insertion hole 74 a for inserting the fixing screw 41 is formed in the fixed surface 74. The protruding piece 33 protruding from the bonding surface 32 of the front panel member 20, the insertion portion 73 provided on the bonding surface 72 of the rear panel member 60, the fixed surface 74 provided in the insertion portion 73, and the protruding piece 33 The fixing portion 40 is configured to fix the front and rear panel members 20 and 60 integrally by surface-bonding the bonding surface 32 and the bonding surface 72 with the fixing screw 41 that closely fixes the fixing member 74 to the fixing surface 74.

  In addition, a protruding positioning portion 75 that protrudes downward beyond the lower wall 64 is formed on the lower end side of the bent wall 63. The positioning portion 75 is a small rectangular piece that protrudes downward from its lower end in the same plane as the bonding surface 72 (bending wall 63). That is, the positioning portion 75 protrudes in a direction (downward) away from the rear panel surface 71 at the lower end of the joint surface 72. A plurality of positioning portions 75 are formed at predetermined intervals along the longitudinal direction of the bent wall 63.

  A small protrusion-shaped tap (attachment portion) 65 is installed on the lower surface side 61 a of the upper wall 61. The tap 65 is a substantially cylindrical small member having a screw hole (not shown) formed in the center of its lower end surface, and a plurality of taps 65 are fixed to appropriate positions on the lower surface side 61a of the upper wall 61 by welding or the like. . The tap 65 is used for attaching a circuit board 50 and a reinforcing member 90 described later.

  On the other hand, a lower wall 66 that is bent forward and protrudes substantially horizontally is connected to the lower end side of the rear wall 62. At the tip of the lower wall 66, an engaged portion 66a made of a slit-like through hole is formed. The engaged portion 66a is for inserting and engaging a tongue-like engaging portion 8a (see FIG. 9) provided at the upper end of the rear wall 8 of the lower case 3 to be described later. A plurality of sets of the engaged portion 66a and the engaging portion 8a are provided at predetermined intervals along the longitudinal direction of the lower wall 66 and the rear wall 8. The engaged portion 66a and the engaging portion 8a constitute a connecting portion 67 that rotatably connects the upper case 2 to the lower case 3.

  FIGS. 5A and 5B are diagrams showing the reinforcing member 90 fixed to the lower surface side of the upper case 2, wherein FIG. 5A is a side view and FIG. 5B is a bottom view. The reinforcing member 90 is a plate-like member formed by bending an iron sheet metal, and is a strip-shaped upper fixing piece 91 and is bent substantially perpendicularly from one end side of the upper fixing piece 91 and extends downward on the lower surface side. A flat plate-like standing wall portion 92 and a small piece-like lower fixing piece 93 bent in a transverse direction perpendicular to the lower end of the standing wall portion 92 are provided. The standing wall portion 92 is formed in a substantially L shape having a laterally extending portion 92a extending in the front-rear direction on the lower surface side of the upper fixed piece 91 and a longitudinally extending portion 92b extending downward from the rear portion of the laterally extending portion 92a. ing. At an appropriate position of the upper fixing piece 91, an insertion hole 91a for inserting a fixing screw 58 (see FIG. 7) fixed to the first and second rail portions 23 and 26, and a fixing screw fixed to the tap 65 A plurality of insertion holes 91b for inserting 59 (see FIG. 7) are formed. Further, the lower fixing piece 93 is formed with an insertion hole 93 a for inserting a fixing screw 9 (see FIG. 10) fixed to the bottom plate 7.

  As will be described later, the reinforcing member 90 is fixed with the upper fixing piece 91 straddling the front panel member 20 and the rear panel member 60 on the lower surface side of the upper case 2, and the lower fixing piece 93 is further fixed to the lower case 3. The base plate 7 is fixed. Further, as shown in FIG. 2, the reinforcing member 90 is attached to an intermediate position in the longitudinal direction on the lower surface side of the upper case 2. Here, the reinforcing member 90 is predetermined on both sides with respect to the center of the pair of side cases 4 and 4. Two sheets are installed, one at a distance.

  Further, as shown in FIG. 2, connection members 70 for connecting both ends of the front panel member 20 and the rear panel member 60 to the lower surface side of the upper case 2 in the vicinity of the pair of side cases 4 and 4, respectively. Is installed. The connecting member 70 is a member formed by bending an iron sheet metal like the reinforcing member 90, and is formed in a strip shape extending in the front-rear direction with a substantially L-shaped cross-sectional shape. The connecting member 70 is attached across the front panel member 20 and the rear panel member 60, and connects the front panel member 20 and the rear panel member 60. The connecting member 70 does not extend to the lower case 3 side like the reinforcing member 90, and only connects the front panel member 20 and the rear panel member 60.

  Next, a procedure for connecting the front panel member 20 and the rear panel member 60 configured as described above will be described. 6A and 6B are views showing a state in which the front panel member 20 and the rear panel member 60 are connected. FIG. 6A is a side sectional view of the front panel member 20 and the rear panel member 60, and FIG. It is the figure which looked at a part of rear panel member 60 from the lower surface side. In order to connect the front panel member 20 and the rear panel member 60, as shown in FIG. 3, the front panel member 20 and the rear panel member 60 are arranged so that the front panel surface 31 and the rear panel surface 71 are parallel at the same height. Are arranged side by side, and in this state, as shown in FIG. 6A, the joining surface 32 of the front panel member 20 and the joining surface 72 of the rear panel member 60 are brought into contact with each other. At this time, the protruding piece 33 is inserted into the insertion portion 73 by matching the position of the protruding piece 33 of the front panel member 20 with the position of the insertion portion 73 of the rear panel member 60. As a result, the protruding piece 33 is disposed directly above the fixing surface 74 (the upper surface of the lower wall 64) in the insertion portion 73. In this state, the fixing screw 41 inserted into the insertion hole 74 a from the lower surface side of the lower wall 64 is fastened to the screw hole 33 a of the protruding piece 33. As a result, the protruding piece 33 is fixed to the fixed surface 74 in a surface contact state, so that the bonding surface 32 and the bonding surface 72 are surface bonded (bonded in a surface contact state). In this way, one continuous extended panel surface 80 in which the front panel surface 31 and the rear panel surface 71 are connected side by side in the surface direction is formed.

  FIG. 7 is a view showing a state in which the reinforcing member 90 is attached to the lower surface side 31 a of the front panel surface 31 and the lower surface side 71 a of the rear panel surface 71, and (a) is a front view seen from the side of the reinforcing member 90. The side sectional view of the panel member 20 and the rear panel member 60, (b) is a view of a part of the front panel member 20 and the rear panel member 60 viewed from the lower surface side. The panel structure of the electronic keyboard instrument 1 of the present embodiment is such that the rear panel surface 71 further extends from the lower surface side 31a of the front panel surface 31 to the front and rear panel members 20 and 60 that are integrally connected by the fixing structure of the fixing portion 40. A reinforcing member 90 is attached so as to straddle the lower surface side 71a. Hereinafter, a procedure for attaching the reinforcing member 90 will be described.

  In order to attach the reinforcing member 90 to the lower surface side 31a of the front panel surface 31 and the lower surface side 71a of the rear panel surface 71, as shown in FIGS. 7A and 7B, the upper fixing piece 91 of the reinforcing member 90 is attached. The first and second rail portions 23 and 26 on the lower surface side 31a of the front panel surface 31 and the tap 65 on the lower surface side 71a of the rear panel surface 71 are installed so as to be in a bridging state. In this state, the fixing screw 59 inserted through the insertion hole 91 b of the upper fixing piece 91 is fastened to the screw hole of the tap 65. Thereafter, the fixing screw 58 inserted through the insertion hole 91 a of the upper fixing piece 91 is fastened between the protrusions 24 and 25 of the first rail portion 23 and between the protrusions 27 and 28 of the second rail portion 26. This fastening is performed while cutting a new screw groove on the side surface of the protrusions 24 and 25 or the protrusions 27 and 28 with the fixing screw 58. Thus, the upper fixing piece 91 of the reinforcing member 90 extends in the front-rear direction and is attached across the lower surface side 31 a of the front panel surface 31 and the lower surface side 71 a of the rear panel surface 71.

  In FIG. 7, only one reinforcing member 90 is illustrated. However, since the housing structure of this embodiment includes two reinforcing members 90, the other reinforcing members 90 are the same as described above. It installs in the lower surface of the upper case 2 by the procedure of. As a result, as shown in FIG. 2, the two reinforcing members 90 in which the standing wall portions 92 are arranged extending in the front-rear direction and the vertical direction on the lower surface side of the upper case 2 are arranged in parallel at a predetermined interval. It becomes a state. Further, the lower fixing piece 93 at the lower end of the standing wall portion 92 is disposed below the front and rear panel surfaces 31 and 71 and substantially parallel to the front and rear panel surfaces 31 and 71.

  In addition, connection members 70 are attached to both sides in the longitudinal direction on the lower surface side of the upper case 2. Although detailed illustration and description of the attachment of the connection member 70 are omitted, the connection member 70 can be attached by the same procedure as that for attaching the upper fixing piece 91 of the reinforcing member 90 to the lower surface side of the upper case 2. By providing the reinforcing member 90 and the connecting member 70, it is possible to effectively increase the rigidity against the bending of the expansion panel surface 80 in which the front panel surface 31 and the rear panel surface 71 are connected in the surface direction.

  FIG. 8 is a diagram showing a state in which the circuit board 50 is attached to the lower surface side 31 a of the front panel surface 31 and the lower surface side 71 a of the rear panel surface 71, and (a) shows the front panel member 20 including the circuit board 50 and The side sectional view of the rear panel member 60, (b) is a view of a part of the front panel member 20 and the rear panel member 60 viewed from the lower surface side. The panel structure of the electronic keyboard instrument 1 of the present embodiment has a circuit board at a position straddling the lower surface side 31a of the front panel surface 31 and the lower surface side 71a of the rear panel surface 71 with the reinforcing member 90 attached. (Substrate member) 50 is attached. Hereinafter, the configuration of the circuit board 50 and the procedure for attaching the circuit board 50 to the front and rear panel members 20 and 60 will be described.

  The circuit board 50 is a flat hard board, and is fixed to an appropriate position at an insertion hole 50a for inserting a fixing screw 53 fixed to the first and second rail portions 23 and 26, and a tap 65. A plurality of insertion holes 50b through which the fixing screws 54 to be inserted are inserted are formed. Further, the circuit board 50 is provided with a fitting portion 51 for fitting a positioning portion 75 provided at the lower end of the bent wall 63 of the rear panel member 60. The fitting portion 51 includes a fitting portion 51 a formed as an opening having a size and shape corresponding to the positioning portion 75 or a fitting portion 51 b formed as a recess. On the circuit board 50, various operation switches 6 such as various operation switches and volumes for use in the operation of the electronic keyboard instrument 1 are mounted. As described above, the operation element 6 has the circuit board 50 attached to the lower surface side 31a of the front panel surface 31 and the lower surface side 71a of the rear panel surface 71 through the opening 21c of the upper wall 21. The panel surface 31 is exposed.

  In order to attach the circuit board 50 configured as described above to the front panel member 20 and the rear panel member 60, first, as shown in FIGS. 8A and 8B, the first and the first of the lower surface side 31a of the front panel surface 31 are provided. The circuit board 50 is installed in a bridging state between the two rail portions 23 and 26 and the tap 65 on the lower surface side 71a of the rear panel surface 71. At this time, the positioning portion 75 of the rear panel member 60 is inserted and fitted into the fitting portion 51 (51a or 51b) of the circuit board 50, thereby positioning the circuit board 50 with respect to the front and rear panel surfaces 31, 71 (front and rear and Left and right positioning).

  In this state, the fixing screw 54 inserted through the insertion hole 50 b of the circuit board 50 is fastened to the screw hole of the tap 65. Thereafter, the fixing screw 53 inserted into the insertion hole 50 a of the circuit board 50 is fastened between the protrusions 24 and 25 of the first rail portion 23 and between the protrusions 27 and 28 of the second rail portion 26. As a result, the circuit board 50 is attached in parallel to the lower surface side 31 a of the front panel surface 31 and the lower surface side 71 a of the rear panel surface 71.

  As described above, when the reinforcing member 90 is provided, the circuit board 50 that extends from the lower surface side 31 a of the front panel surface 31 to the lower surface side 71 a of the rear panel surface 71 can be installed. That is, by attaching the reinforcing member 90, it is possible to prevent the expansion panel surface 80 in which the front panel surface 31 and the rear panel surface 71 are aligned and connected in the surface direction from being bent, so that a flat component such as the circuit board 50 can be obtained. It can be attached across the front panel surface 31 and the rear panel surface 71. That is, it is possible to prevent an excessive force from acting on the circuit board 50 even if an external force is applied to bend the connection portion between the front panel surface 31 and the rear panel surface 71. For this reason, the space between the lower surface side 31a of the front panel surface 31 and the lower surface side 71a of the rear panel surface 71 can be effectively utilized.

  Next, a procedure for attaching the upper case 2 assembled in the above procedure to the lower case 3 will be described. 9 and 10 are schematic side views for explaining a procedure for attaching the upper case 2 to the lower case 3. FIG. 9 is a view showing a state in which the upper case 2 is opened. FIG. It is a figure which shows the closed state. FIG. 9 is a diagram corresponding to the state of FIG. 2, and FIG. 10 is a diagram corresponding to the state of FIG. As shown in FIG. 9, a tongue-like engaging portion 8a provided at the upper end of the rear wall 8 of the lower case 3 is engaged with a slit-like engaged portion 66a provided on the lower wall 66 of the upper case 2. As a result, the rear wall 8 of the lower case 3 and the lower wall 66 of the upper case 2 are relatively rotatably connected. As a result, the upper case 2 is attached so as to be rotatable around an axis extending in the lateral direction along the arrangement direction of the keys 11 with the connecting portion 67 connected to the lower case 3 as a fulcrum. In other words, the upper case 2 is installed such that the front end side is pivotable up and down above the lower case 3 with the connecting portion 67 provided on the lower wall 66 (rear end) as a fulcrum.

  In this state, the upper case 2 covers the upper end of the rear end portion 10a of the keyboard 10 as shown in FIGS. 1 and 10 by rotating the upper case 2 from the top to the bottom with the connecting portion 67 as a fulcrum. Installed at. As a result, as shown in FIG. 10, the front side (mainly the front panel member 20) of the upper case 2 covers the rear end portion 10 a of the keyboard 10 from above, and the lower fixing piece 93 of the reinforcing member 90 is attached to the lower case 3. Contact the bottom plate 7. Further, the laterally extending portion 92 a of the reinforcing member 90 is disposed directly above the rear end portion 10 a of the keyboard 10. Thereafter, the fixing screw 9 is fastened from the lower surface side of the bottom plate 7 of the lower case 3 to fix the lower fixing piece 93 to the bottom plate 7. Further, the front end of the lower wall 66 of the upper case 3 and the front end of the rear wall 8 of the lower case 3 are fixed with the fixing screw 5. Thus, the attachment to the lower case 3 of the upper case 2 is completed. When performing maintenance or the like on the electronic keyboard instrument 1, the fixing screw 9 and the fixing screw 5 are removed to release the fixing of the lower fixing piece 93 to the bottom plate 7, and in this state, the upper case with the connecting portion 67 as a fulcrum. If the front end of 2 is lifted and rotated upward from below, the upper case 2 can be opened as shown in FIGS. In this state, if the upper case 2 is supported by a support or the like (not shown), the inside of the housing behind the keyboard 10 is opened.

  As described above, in the case structure of the present embodiment, the upper case 2 includes the front panel member (first upper surface member) 20 that covers the upper surface side of the rear end portion 10a of the keyboard 10 and the front panel member 20. A rear panel member (second upper surface member) 60 that is connected side by side in the surface direction on the rear side and covers the upper surface side and the rear surface side of the rear end portion 10a of the keyboard 10 and is separated from the pair of side surface cases 4 and 4 The reinforcing member 90 is mounted on the lower surface side of the upper case 2 at the position, straddling the front panel member 20 and the rear panel member 60, and the reinforcing member 90 has an upper end 91 that is the same as that of the front panel member 20 of the upper case 2. While fixing the rear panel member 60 integrally, the lower case part 93 is being fixed to the bottom plate 7 of the lower case 3, and the upper case 2 and the lower case 3 are being fixed integrally.

  In order to connect or reinforce the connection location of the upper case 2 when the upper case 2 has a structure in which the front panel member 20 and the rear panel member 60 are connected side by side as in the case structure of the present embodiment, A reinforcing member 90 attached across the front panel member 20 and the rear panel member 60 on the lower surface side of the upper case 2 at an intermediate position away from the pair of side surface cases 4 and 4 may be provided. In addition, in the case structure of the present embodiment, the front panel member 20 and the rear panel member 60 of the upper case 2 are fixed integrally with the reinforcing member 90, and the upper case 2 and the lower case 3 are further fixed with the same reinforcing member 90. It is fixed together. That is, the three members of the front panel member 20 of the upper case 2, the rear panel member 60, and the bottom plate 7 of the lower case 3 are fixed integrally with one reinforcing member 90. Accordingly, the rigidity of the upper case 2 formed by connecting a plurality of plate members side by side can be ensured while having a simple structure with a reduced number of parts. At the same time, since the upper case 2 and the lower case 3 can be firmly fixed, distortion between the upper case 2 and the lower case 3 can be effectively prevented, and the housing structure can be made robust. .

  Further, in the case structure described above, the reinforcing member 90 includes the upper fixing piece 91 fixed to the lower surface side of the front and rear panel members 20, 60, and the lower case 3 protruding downward from the lower surface of the upper fixing piece 91. A flat plate-like standing wall portion 92 that extends to the bottom plate 7 and a lower fixing piece 93 that protrudes in a transverse direction perpendicular to the lower end of the standing wall portion 92 and is fixed to the bottom plate 7. It is formed in a substantially L shape having a laterally extending portion 92a extending in the front-rear direction on the lower surface side of the piece 91 and a longitudinally extending portion 92b extending downward from the rear portion of the laterally extending portion 92a. Then, by assembling the upper case 2 to which the reinforcing member 90 is attached to the lower case 3, the laterally extending portion 92 a of the reinforcing member 90 is arranged directly above the rear end portion 10 a of the keyboard 10.

  Therefore, sufficient rigidity on the front end side of the upper case 2 covering (overlapping) the upper surface side of the rear end portion 10a of the keyboard 10 can be ensured by the laterally extending portion 92a of the reinforcing member 90. Since the laterally extending portion 92a of the reinforcing member 90 is arranged directly above the rear end portion 10a of the keyboard 10, the upper case 2 bends even when a load is applied to the front end side of the upper case 2. It is possible to effectively prevent contact with the rear end portion of the keyboard 10. In particular, in the case structure of the present embodiment, the panel surface (control panel) 31 on which operators such as switches are arranged is provided on the upper case 2, so that by operating the operators 6 arranged on the panel surface 31. Although a load is applied to the upper case 2 from the upper surface side, the laterally extending portion 92a can effectively prevent the front end side of the upper case 2 from being bent.

  Further, in the case structure described above, the upper case 2 has a connecting portion 67 provided on the lower wall 66 rotatably connected to the lower case 3, and the upper case 2 to which the reinforcing member 90 is attached. The upper case 2 is covered from above the rear end portion 10 a of the keyboard 10 by rotating from the upper side to the lower side with the connecting portion 67 as a fulcrum, and the lower fixing piece 93 of the reinforcing member 90 is the bottom plate 7 of the lower case 3. It comes to contact with. As a result, the upper case 2 can be covered with the rear end portion 10a of the keyboard 10 only by rotating the upper case 2 to which the reinforcing member 90 is attached from the upper side to the lower side. It can be installed on the bottom plate 7 of the lower case 3. Accordingly, both the installation of the upper case 2 and the installation of the reinforcing member 90 can be performed by one operation of rotating the upper case 2 from the top to the bottom, so that the upper case 2 can be assembled in a small number of steps. Become. Therefore, simplification of the assembly process of the housing can be achieved.

  In the present embodiment, the reinforcing member 90 is attached to the lower surface side of the upper case 2, so that the upper case 2 formed by connecting the front panel member 20 and the rear panel member 60 side by side in the surface direction is bent. Since this can be prevented, a plate-like component such as the circuit board 50 can be attached across the lower surface sides of the front panel member 20 and the rear panel member 60. Thereby, the space of the lower surface side of the front panel member 20 and the rear panel member 60 can be used effectively.

  Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the technical idea described in the claims and the specification and drawings. Is possible. It should be noted that any shape, structure, and material not directly described in the specification and drawings are within the scope of the technical idea of the present invention as long as the effects and advantages of the present invention are exhibited.

  For example, the number and location of the reinforcing members 90 provided in the electronic keyboard instrument 1 of the above embodiment are merely examples, and the reinforcing member 90 may be at an intermediate position in the longitudinal direction of the upper case 2 away from the side cases 4 and 4. For example, it is possible to attach to a position other than that shown in the above embodiment. Further, the specific number of reinforcing members is not limited to two in the above embodiment, but may be other numbers.

  Moreover, the specific structure of the upper case 2 shown in the said embodiment is an example, The front panel member 20 may be members other than the extrusion molding product of aluminum, and the rear panel member 60 is other than sheet metal. It may be a member. The upper case 2 is composed of two or more plate-like members in addition to the two plate-like members of the front panel member (first upper surface member) 20 and the rear panel member (second upper surface member) 60. It may be configured.

DESCRIPTION OF SYMBOLS 1 Electronic keyboard instrument 2 Upper case 3 Lower case 4, 4 Side case 7 Bottom plate 10 Keyboard 10a Rear end part 11 Key 20 Front panel member (1st upper surface member)
21 Upper wall 22 Front wall 23 First rail portion 26 Second rail portion 40 Fixed portion 50 Circuit board 60 Rear panel member (second upper surface member)
61 Upper wall 61a Lower surface side 62 Rear wall 63 Bending wall 65 Tap 66 Lower wall 67 Connection part 70 Connection member 80 Expansion panel surface 90 Reinforcement member 91 Upper fixed piece (upper end part)
92 Standing wall portion 92a Horizontally extending portion 92b Vertically extending portion 93 Lower fixed piece (lower end)

Claims (4)

An electronic device composed of a lower case having a bottom plate installed on the lower surface side of the keyboard, an upper case covering the upper surface side and the rear surface side of the rear end of the keyboard, and a pair of side surface cases covering both side surfaces of the keyboard In the keyboard instrument housing structure,
The upper case is
A first upper surface member covering the upper surface side of the rear end of the keyboard;
A second upper surface member connected side by side in the plane direction on the rear side of the first upper surface member and covering the upper surface side and the back surface side of the rear end portion of the keyboard,
A reinforcing member attached across the first upper surface member and the second upper surface member on the lower surface side of the upper case at an intermediate position away from the pair of side surface cases,
The reinforcing member integrally fixes the first upper surface member and the second upper surface member of the upper case at its upper end portion, and its lower end portion is fixed to the bottom plate of the lower case. A housing structure for an electronic keyboard instrument, wherein the upper case and the lower case are fixed together. The reinforcing member includes an upper fixing piece fixed to the lower surface side of the first and second upper surface members, and a flat plate-like wall portion protruding downward from the lower surface of the upper fixing piece and extending toward the lower case. And a lower fixing piece that protrudes in a transverse direction perpendicular to the lower end of the standing wall portion and is fixed to the bottom plate,
The upright wall portion is substantially L-shaped having a laterally extending portion that extends rearward from the front end of the upper case on the lower surface side of the upper fixed piece, and a longitudinally extending portion that extends downward from the rear portion of the laterally extending portion. Formed,
2. The laterally extending portion of the reinforcing member is disposed directly above the rear end of the keyboard by assembling the upper case with the reinforcing member attached to the lower case. The electronic keyboard instrument housing structure. The upper case is configured such that a connecting portion provided at a rear end thereof is rotatably connected to the lower case,
The upper case to which the reinforcing member is attached pivots from the upper side to the lower side with the connecting portion as a fulcrum, so that the upper case covers the rear end portion of the keyboard from above and the lower fixing of the reinforcing member. The casing structure of the electronic keyboard instrument according to claim 1, wherein a piece abuts against the bottom plate of the lower case. The electronic keyboard instrument according to any one of claims 1 to 3, further comprising a board component that is installed across the first upper surface member and the second upper surface member on the lower surface side of the upper case. Housing structure.

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