JP4370468B2 - Enclosure engagement device for electronic equipment - Google Patents

Description

   The present invention relates to a housing engaging device of an electronic device, and a housing engaging device used for an electronic measuring device and other general electronic devices engaged so as to cover a front opening of a cylindrical housing with a front cover. Regarding improvements.

   Conventionally, as a case engaging device for such an electronic device, as shown in FIGS. 7 and 8, a flange 3 is provided on the outer periphery of the front opening of the bottomed cylindrical case 1, and A front cover 7 having an outer diameter similar to that of the flange 3 is formed through the locking hole 5 and is engaged from the opening of the housing 1, and as shown in FIG. There is known a configuration in which a locking projection 11 protruding from the tip of an insertion piece 9 extending from the locking piece 5 is locked in a locking hole 5 and the front cover 7 is fixed to the housing 1.

  As shown in FIG. 9, the locking hole 5 of the flange 3 and the insertion piece 9 of the front cover 7 are also formed on the lower surface side of the housing 1 and the front cover 7. 8 is not visible.

  7 to 9, reference numeral 13 denotes an insertion hole formed in the contact surface with the flange 3 in the front lid 7, and reference numerals 15 and 17 in FIG. 8 denote display units such as liquid crystal disposed in the front lid 7. 9 and reference numerals 19 and 21 in FIG. 9 are a circuit board supported by the front lid 7 and a pair of clamping pieces for clamping the circuit board.

  As shown in FIG. 7, such a housing engaging device for an electronic device is inserted from the bottom side of the housing 1 into the mounting hole of the mounting panel 23 and is brought into contact with the flange 3, so that the housing 1 The panel 23 is fixed by pressing the back surface of the panel 23 with an appropriate holding means (not shown).

  Then, when removing the front cover 7 from the housing 1, as shown in FIG. 9, the tip of the minus driver 25 is inserted into the insertion hole 13 of the front cover 7 from the upper surface side as shown by an arrow “I”. Then, the front end of the driver 25 is expanded as indicated by an arrow “B” so as to pry open the vicinity of the opening of the casing 1 at the tip of the driver 25, and the locking between the casing 1 and the locking projection 11 is released. I was pulling out.

  However, since the housing engaging device having the above-described configuration needs to insert the tip of the minus driver 25 into the insertion hole 13 from the side surface side of the front lid body 7, When the front lid 7 was removed, it was difficult to insert the tip of the driver 25 into the insertion hole 13 and the workability was not good.

  In particular, when the housing engaging device, that is, the electronic device is attached to the panel 23 in multiple stages, the tip of the driver 25 can hardly be inserted into the insertion hole 13, so that the electronic device must be removed from the panel 23 one by one, which is extremely troublesome. Met.

  In addition, the screwdriver 25 inserted into the insertion hole 13 of the front lid body 7 is tilted and widened so that the vicinity of the opening of the housing 1 is opened at the tip, thereby locking the housing 1 and the locking protrusion 11. Since the lock is released, it is difficult to release the lock between the housing 1 and the lock protrusion 11, and it is necessary to be careful not to damage the case 1. From this point of view, the workability is poor.

  SUMMARY OF THE INVENTION The present invention has been made to solve such problems, and it is easy to remove the front lid engaged with the casing, and it has good workability and is less likely to cause damage. The purpose is to provide.

  In order to solve such a problem, the present invention has a cylindrical casing having a locking hole in the vicinity of the front-side opening, and is detachably engaged so as to cover the opening of the casing. A front lid, which is formed at an edge of the front lid and is inserted along the inner wall of the housing from the opening thereof, and projects from the outer surface of the insertion piece and is engaged with the locking hole. A front cover body having a locking projection to be stopped and an insertion port extending continuously from the outer surface of the insertion piece to the front side of the front cover body, and the engagement on the outer surface of the insertion piece A release member that is inserted between the housing and the housing so as to be displaceable toward the protrusion, and a downward slope formed toward the locking protrusion includes a release member that comes into contact with the corner portion of the opening And, by pressing the release member on the insertion piece from the insertion port, the casing corner by the downward slope is expanded, Locking projection which is engaged in the engaging hole of the is configured to be able to unhook.

  Moreover, in the present invention, the release member may be formed so as to be fitted to both end portions along the protruding direction of the insertion piece.

  Further, in the present invention, the insertion piece can be formed narrower than the insertion port.

  In such a housing engaging device according to the present invention, the front lid engaged so as to cover the opening of the housing, the insertion piece inserted into the inner wall of the housing, and the outer surface of the insertion piece Provided with a locking projection protruding and locked in the locking hole, and an insertion port extending continuously from the outer side surface of the insertion piece to the front side of the front cover body, and inserted along the inner wall of the housing Insert the piece and lock the locking projection in the locking hole, place the release member on the outer surface of the insertion piece and insert it between the housing and the downward slope toward the locking projection When the front lid is detachably engaged with the casing by contacting the corner of the casing, when the release member is pressed from the insertion port of the front lid, the downward slope of the release member is Since the portion is expanded, the locking projection is released from the locking hole.

  In addition, in the configuration in which the release member is formed so as to be fitted to both end portions along the protruding direction of the insertion piece, the release member can be easily arranged on the insertion piece, and the assembly becomes easier.

  Further, in the present invention, in the configuration in which the insertion piece is formed narrower than the insertion port, it is difficult to make the shape of the release member complicated.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, the same code | symbol is attached | subjected to the part which is common in a prior art example.

  FIG. 1 and FIG. 2 are an exploded perspective view and a plan view of main parts showing an embodiment of a housing engaging device according to the present invention.

  1 and 2, a cylindrical housing 1 is formed from a synthetic resin into a bottomed shape having a square cross section, and an external connection terminal is formed on the outer periphery of the bottom, but it is not a main part of the present invention. Therefore, illustration of the external connection terminals is omitted.

  A flange 3 is formed on the outer periphery of the front opening of the housing 1 to have a slightly larger diameter, and a thin locking hole 5 is formed in the middle of the flange 3, that is, the front opening and in the middle of the upper and lower sides. Has been. The lower locking hole 5 is hidden and cannot be seen (the same applies to FIG. 2).

  In the vicinity of the front opening of the housing 1, the inside of the flange 3 in which the upper and lower locking holes 5 are formed is partitioned to form thin, shallow slit-shaped insertion portions 27, respectively. Is formed so as to penetrate the insertion portion 27 and the outside.

  The front lid body 7 is formed from a synthetic resin in the shape of a square plate having the same outer diameter as that of the flange 3 and is engaged so as to cover the opening of the housing 1. Has a display unit 15 such as a liquid crystal and an operation unit 17 such as a switch.

  The front lid body 7 has a pair of insertion pieces 9 integrally projecting toward the back side in the middle of each of the positions on the back surface and close to the upper end side and the lower end side. The insertion piece 9 on the lower end side is not visible in FIGS.

  Each insertion piece 9 has a locking projection 11 integrally projecting outward (upward and downward in the figure) on the outer side surface 9a, that is, the upper side surface. The locking projection 11 is locked in the locking hole 5 (see FIGS. 4 and 5 described later).

  The outer side surface 9a of each insertion piece 9 extends in the same plane on the front side, and serves as an insertion port 29 cut into a U-shape from the upper end of the front lid 7. In addition, the width of the insertion port 29 is larger than the width of each insertion piece 9, and conversely, when viewed from each insertion piece 9, it is formed narrower than the insertion port 29.

  A release member 31 is disposed on each insertion piece 9. As shown in FIGS. 1 and 3, the release member 31 includes, for example, a small block piece 31a having a length equal to or slightly shorter than the width of the insertion port 29, and legs extending from both sides of the small block piece 31a. And a pair of guide portions 31b projecting in the same direction (rearward in the figure), and both guide portions 31b are fitted to both edges of the insertion piece 9 so as to straddle the insertion piece 9. It is arranged on the outer surface 9 a of the insertion piece 9 and can be slid on the insertion piece 9 toward the protruding direction, that is, the locking projection 11.

  The release member 31 is in the small block piece 31a, and has a downward slope 31c in the direction of the guide part 31b on the protruding side of the guide part 31b, and both guide parts 31b are connected to both edge parts of the insertion piece 9. When it is inserted into the insertion portion 27 in a state of being placed on the outer side surface 9a of the insertion piece 9 so as to be fitted over the insertion piece 9, the downward slope 31c abuts against the front opening opening corner P of the housing 1 It has come to be.

  In addition, the release member 31 can be pushed out from the insertion port 29 of the front lid 7, and is further inserted into the insertion portion 27 by being pushed out, and the downward slope 31 c is a corner portion of the front opening of the housing 1. P is pushed up more.

  As shown in FIG. 4, a pair of sandwiching pieces 21 project in the back direction between the upper and lower insertion pieces 9 on the back surface of the front lid 7, and a necessary number of circuits are interposed between the sandwiching pieces 21. A substrate 19 is sandwiched. These illustrations are omitted in FIGS.

  The circuit boards 19 are directly or indirectly connected to the display unit 15 and the operation unit 17 described above, and are connected to external connection terminals arranged on the bottom of the housing 1 to constitute an electronic device. ing.

  Next, a usage example of such a case engagement device will be described.

  First, as shown in FIG. 1, the release member 31 is arranged on the outer surface 9 a of the insertion piece 9 so that both guide portions 31 b of the release member 31 are fitted to both edges of the insertion piece 9 and straddle the insertion piece 9. As shown in FIG. 4, the insertion piece 9 is inserted into the insertion portion 27 of the housing 1 to lock the locking projection 11 in the locking hole 5, and the downward slope 31 c of the release member 31 on the insertion piece 9. Is brought into contact with the front opening corner P of the casing 1 to engage the front lid 7 with the casing 1.

  When removing the front cover 7 from the housing 1, as shown in FIG. 5, the tip of the minus driver 25 is inserted laterally from the front side of the front cover 7 into the insertion port 29 and the release member 31 is pushed. If released, the release member 31 slides forward and is further inserted into the insertion portion 27, and the front opening corner P of the housing 1 is pushed up as indicated by an arrow “c” by the descending slope 31c, and the front opening is curved. To be expanded.

  Therefore, the locking projection 11 is removed from the locking hole 5 of the housing 1 and the locking state between the housing 1 and the front cover body 7 is released. Therefore, if the front cover body 7 is pulled out from the housing 1 as it is. good.

  As described above, the housing engaging device for an electronic device according to the present invention includes the cylindrical housing 1, the front lid body 7 and the release member that are detachably engaged so as to cover the opening of the housing 1. 31, a locking hole 5 is formed in the vicinity of the front side opening of the housing 1, and the front lid 7 is inserted along the inner wall of the housing 1 from the opening. An insertion piece 9, a locking projection 11 protruding from the outer surface of the insertion piece 9 and locked to the locking hole 5, and continuously extending from the outer surface of the insertion piece 9 to the front side of the front lid. The insertion port 29 is formed, and the release member 31 can be inserted into the housing 1 so as to be movable toward the locking projection 11 on the outer surface of the insertion piece 9, and its locking A downward slope 31c formed toward the protrusion 11 is formed so as to be able to contact the casing corner portion P in the opening, and the release portion thereof is inserted from the insertion port 29 of the front lid body 7. The expansion of the casing 1 inside surface by downslope 31c by the pressing of 31, to constitute a locking projection 11 which is engaged in the locking hole 5 engaging releasably.

  Therefore, it is possible to release the locking between the locking hole 5 and the locking projection 11 simply by pushing the release member 31 backward from the front cover 7, and it is easy to remove the front cover 7 from the housing 1. The removal work is simplified and the housing 1 is hardly damaged.

  Moreover, in the housing engaging device having the above-described configuration, the tip of the minus driver 25 is inserted from the insertion port 29 from the front side of the front lid body 7 and the release member 31 is pressed to engage the locking hole 5. The locking with the stop projection 11 can be released, and jigs such as the screwdriver 25 can be easily inserted. In particular, the tip of the screwdriver 25 is inserted even when the housing engaging device is attached to the panel 23 in multiple stages. It can be easily inserted into the mouth 29, and it is not necessary to remove the electronic devices from the panel 23 one by one, so that workability is simple.

  Furthermore, since the release member 31 has the guide portions 31b that are fitted to both end portions along the protruding direction of the insertion piece 9, the release member 31 can be stably placed or placed on the insertion piece 9 and can be easily engaged. Assembly becomes easier.

  Furthermore, since the width of the insertion piece 9 is narrower than that of the insertion port 29 of the front lid 7, the release member 31 can form the guide portion 31b within the range of the length of the prismatic block piece 31a. Therefore, it is difficult to make the shape complicated, so that the prism member can be formed by simple cutting, and the release member 31 can be easily manufactured.

  By the way, the release member 31 described above is formed so as to be able to be fitted so as to straddle the insertion piece 9 by forming a pair of guide portions 31b from both sides of the prismatic block piece 31a, but is not limited thereto.

  For example, as shown in FIG. 6, a prismatic block piece 31 a can be arbitrarily formed such as a shape having a downward slope 31 c and a plug portion 31 d inserted between the insertion piece 9 and the housing 1. In the release member 31 of FIG. 3 described above, the guide portion 31b functions as the insertion portion 31d.

  In short, the release member 31 can be inserted between the housing 1 so as to be movable toward the locking projection 11 on the outer surface of the insertion piece 9, and toward the locking projection 11. The object of the present invention can be achieved as long as the formed down slope 31a can be brought into contact with the case corner P of the opening.

  Furthermore, it goes without saying that the insertion port 29 formed in the front lid 7 for pushing in the release member 31 is not limited to a shape cut into a U-shape from the upper end, and may be an insertion hole or the like.

It is a principal part disassembled perspective view which shows embodiment of the housing | casing engaging apparatus which concerns on this invention. It is a principal part exploded top view which shows embodiment of the housing | casing engagement apparatus of FIG. It is the perspective view, side view, and rear view which show the releasing member shown in FIG. It is principal part sectional drawing (IV-IV cross section in FIG. 2) which shows embodiment of the housing engaging apparatus of FIG. It is principal part sectional drawing which shows the usage example of the housing | casing engagement apparatus of FIG. It is a perspective view which shows the other example of the cancellation | release member used for the housing | casing engagement apparatus of FIG. It is a top view which shows the conventional housing | casing engagement apparatus. It is a perspective view of the conventional housing engaging device. FIG. 8 is a cross-sectional view of an essential part showing a usage example of the housing engaging device of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Housing | casing 3 Flange 5 Locking hole 7 Front cover body 9 Insertion piece 9a Outer side surface (upper side surface)
DESCRIPTION OF SYMBOLS 11 Locking protrusion 13 Insertion hole 15 Display part 17 Operation part 19 Circuit board 21 Clamping piece 23 Panel 25 Driver (jig)
27 Insertion part 29 Insertion port 31 Release member 31a Block piece 31b Guide part (insertion part)
31c Down slope 31d Plug part P Front opening inside corner

Claims (3)

A casing of an electronic device that has a cylindrical shape and has a locking hole in the vicinity of the front side opening,
A front lid that is detachably engaged so as to cover the opening of the housing, and is an insertion piece that is formed at an edge of the front lid and is inserted along the inner wall of the housing from the opening A locking projection that protrudes from the outer surface of the insertion piece and is locked to the locking hole, and an insertion port that extends from the outer surface of the insertion piece to the front surface of the front cover body. A front lid,
A release member that is inserted between the housing and the housing so as to be movable toward the locking projection on the outer surface of the insertion piece, and a downward slope formed toward the locking projection is formed in the opening. A release member abutted against the corner portion of the housing;
Comprising
The locking protrusion locked in the locking hole is locked by the opening of the casing by the downward slope by the pressing of the release member on the insertion piece from the insertion port of the front lid. A housing engaging device for an electronic device, which is configured to be releasable. 2. The case engaging device for an electronic device according to claim 1, wherein the release member is formed to be fitted to both end portions along a protruding direction of the insertion piece. The housing engaging device for an electronic device according to claim 2, wherein the insertion piece is formed narrower than the insertion port.

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