JP4504786B2 - Mounting structure for operation panel of electronic component unit - Google Patents

Description

  The present invention relates to a structure for mounting an electronic component unit to an operation panel, and in particular, operates an electronic component unit formed by potting with a potting agent in a state where a printed board on which one or more electronic components are mounted is accommodated in a potting case. The present invention relates to a mounting structure for mounting on the back side of a panel.

  Severe environments where water and various gases are generated in electronic devices equipped in water treatment equipment that treats various types of water and aqueous solutions as water to be treated, and water supply equipment such as washstands and hot water flush toilets Therefore, it is necessary to maintain the life and reliability of electronic components. For this reason, an electronic component unit is formed by potting with a potting agent in a state where a printed board on which one or a plurality of electronic components are mounted is housed in a potting case, and the electronic component unit is attached to the operation panel. A means to be mounted and installed on the above-described water treatment apparatus or water supply equipment side is adopted.

  Therefore, in order to equip the electronic component unit in a water treatment device or a water supply device, the electronic component unit is mounted on the back side of the operation panel attached to the water treatment device or the water supply device side. It is required to mount efficiently and reliably without impairing the function. The means for attaching the electronic component unit to the back side of the operation panel has already been executed, and has also been proposed in the patent document under the name “control board mounting method” (see Patent Document 1).

  The “control board mounting method” proposed in Patent Document 1 described above is a function board (a method of attaching an electronic component unit to a board fixing member on the water-circulating device side, and the board fixing member is an operation panel. Although not the same member, the mounting means is common to the mounting means for the operation panel.In this mounting method, a plurality of mounting columns are erected around the placement area of the functional board in the board fixing member, The electronic component unit is engaged via the potting case and the mounting column by engaging the engaging claw on the leading end side of the mounting column with the leading edge of the potting case that constitutes the functional board located at the arrangement site. Is attached to the board fixing member.

Therefore, in order to attach the functional board to the board fixing member by carrying out the mounting method, the functional board is inserted into the placement site of the board fixing member by being slightly bent outward and positioned. At the time when the functional board has been accommodated in the arrangement site in this way, each mounting column returns, and the engaging claw of each mounting column engages with the edge of the potting case constituting the functional board. Thereby, the functional board is attached to the board fixing member on the side of the watering equipment.
JP 2003-163475 A

  As described above, according to the mounting method, the functional substrate (electronic component unit) can be efficiently and reliably attached to the substrate fixing member on the water-circulating device side without impairing the function of the electronic component. Therefore, if the mounting method is carried out, a mounting structure with an excellent mounting function can be configured. However, according to the mounting structure, the functional board is mounted upright on the board fixing member. The head portion of the engaging claw on the tip side of each mounting column protrudes greatly to the surface side of the potting case. For this reason, when the functional board is attached to the board fixing member, the outer diameter dimension of the functional board is increased by the amount that the head of each mounting column protrudes, and the functional board is enlarged. In the case where the control device is disposed on the surface side (back) of the potting case, it is a problem to secure a space for disposing the control device.

  Accordingly, an object of the present invention is to provide an attachment structure in which an electronic component unit is attached to the back surface of an operation panel, and the tip of the attachment column on the operation panel side does not protrude from the surface of the potting case. This is to prevent the component unit from becoming large in a state where it is attached to the operation panel.

  The present invention relates to a structure for mounting an electronic component unit to an operation panel. The electronic component unit mounting structure for the operation panel according to the present invention includes an electronic component unit formed by potting with a potting agent in a state where a printed board on which one or more electronic components are mounted is accommodated in a potting case. This is an attachment structure for an operation panel of an electronic component unit for attachment to the back side.

  Therefore, the mounting structure for the operation panel of the electronic component unit according to the present invention includes a plurality of mounting columns provided on the potting case of the electronic component unit. In the mounting structure for mounting the electronic component unit to the operation panel by engaging an engaging claw provided at the tip of the mounting column with an opening portion of the through hole of the potting case. The opening edge of the through hole of the potting case is provided with an engagement recess having a predetermined depth, and the engagement claw is engaged with the engagement recess from the position of the surface of the potting case. Is characterized by being buried.

  In the mounting structure for the operation panel of the electronic component unit according to the present invention, the engaging claw of the mounting column and the engaging recess of the potting case are formed on a substantially horizontal plane. Can do.

  Further, in the mounting structure, the engaging claw of the mounting column and the engaging recess of the potting case engage with each other to form an engaging surface on the inclined surface. It can be made to engage also in the direction orthogonal to the through hole.

  Further, in the mounting structure, the front end side of the engaging claw of the mounting column is formed in an acute angle shape projecting toward the engaging surface of the engaging recess of the potting case, and the engaging claw is engaged. The leading end side of the mating surface can be bitten into the engaging surface of the engaging recess of the potting case, and both the engaging surfaces can be engaged in the direction orthogonal to the through hole.

  According to the mounting structure for the operation panel of the electronic component unit according to the present invention, like the conventional mounting structure of this type, the electronic component unit can be used as the operation panel, and the function of the electronic component can be efficiently and reliably prevented. Can be installed on. Thus, the mounting structure according to the present invention exhibits an excellent mounting function.

  In addition, when the electronic component unit is mounted on the operation panel, the engaging claw on the tip side of each mounting column is located in the engaging recess of the potting case, and the head of the engaging claw is potted. It is in a state of being buried from the position of the surface of the case. For this reason, the outer diameter size of the entire electronic component unit attached to the operation panel is smaller than that of the conventional electronic component unit of this type, and the electronic component unit attached to the operation panel is There is no increase in size.

  In the mounting structure for the operation panel of the electronic component unit according to the present invention, the engaging claw of the mounting column and the engaging recess of the potting case engage with each other to form a substantially horizontal plane, It is possible to prevent the operation panel of the electronic component unit from being detached from each mounting column, and thus it is possible to securely attach the electronic component unit to the operation panel.

  On the other hand, both engaging surfaces in which the engaging claws of the mounting column and the engaging recesses of the potting case engage with each other are formed on an inclined surface, and the both engaging surfaces are orthogonal to the through hole. If it is made to engage also with respect to, there exists an advantage which can prevent the backlash of the horizontal direction orthogonal to the through-hole of an electronic component unit. In addition, the tip end side of the engaging claw of the mounting column is formed in an acute angle shape projecting toward the engaging surface of the engaging recess of the potting case, and the tip end side of the engaging surface of the engaging claw is the potting case The lateral direction perpendicular to the through hole of the electronic component unit can be obtained by biting into the engagement surface of the engagement recess of the electronic component unit so that both the engagement surfaces engage with the direction perpendicular to the through hole. Can be prevented.

  The present invention relates to a mounting structure for an operation panel of an electronic component unit. The mounting structure according to the present invention pots a printed board mounted with one or more electronic components in a potting case with a potting agent. The electronic component unit is attached to the operation panel for attaching the electronic component unit to the back side of the operation panel.

  FIG. 1 shows an operation panel 20 to which the electronic component unit 10 is attached, FIG. 2 shows the front side of the electronic component unit 10, and FIG. 3 is viewed along the line 3-3 in FIG. The longitudinal cross-section which abbreviate | omitted some electronic component units 10 is shown.

  As shown in FIGS. 2 and 3, the electronic component unit 10 is obtained by potting a printed board 11 on which a large number of electronic components are mounted in a potting case 12 with a potting agent 13. Is cured. In this state, the push button switch 14 and the display lamp 15 constituting the electronic component are exposed from the surface of the potting agent 13 on which the potting agent 13 is cured.

  The potting case 12 that accommodates the printed board 11 is made of a synthetic resin having a rectangular shallow box shape. The case body 12a constituting the potting case 12 is a box whose back side is closed and whose front side is fully open. Is the body. The case main body 12a is integrally provided with four cylindrical bodies 12b at a site near the side edge. Each cylindrical body 12b has a substantially rectangular cross section, and is erected at four locations with predetermined intervals, and the inside of the cylindrical body 12b is formed in a through hole 12c having a rectangular cross section. The through hole 12c opens from the cylindrical body 12b to the front side surface and the back side surface of the case body 12a. Further, the opening end on the back side of the through hole 12c is formed to be large, and this portion is an engagement recess 12d having a predetermined depth. In the engagement recess 12d, the step inside the through hole 12c is the engagement surface 12d1. As shown in FIGS. 3 and 4, the engagement surface 12 d 1 is formed on horizontal surfaces that face each other.

  On the other hand, the operation panel 20 for mounting the electronic component unit 10 is made of a synthetic resin having a rectangular shallow box shape. A mounting post 22 is erected. Each mounting column 22 is located at a portion corresponding to each cylindrical body 12 b of the potting case 12. As shown in FIG. 3, the mounting column 22 has a thin flat plate-shaped column main body 22a with a distal end formed on an engaging claw 22b.

  The column main body 22a of the mounting column 22 is formed to have substantially the same length as the through hole 12c formed by the cylindrical body 12b of the potting case 12, and can be inserted into the through hole 12c. Further, the engaging claw 22b of the mounting column 22 extends toward the engaging recess 12d formed in the through hole 12c of the potting case 12, and the engaging claw 22b is potted at its engaging surface 22b1. The case 12 is formed to be engageable with the engagement surface 12d1 of the engagement recess 12d. As shown in FIGS. 3 and 4, the engaging surface 22b1 is formed on a horizontal plane facing the engaging surface 12d1.

  In order to attach the electronic component unit 10 to the back side of the operation panel 20, a positioning hole 12 a 1 provided in the outer peripheral portion of the potting case 12 and the substantially central portion projects from the back surface of the operation panel 20 (not shown). The electronic component unit 10 is pushed to the back side of the operation panel 20 by being fitted into the positioning protrusion. As a result, each mounting column 22 on the operation panel 20 side is inserted into the through hole 12c of each cylindrical portion 12b of the potting case 12 in a state where it is once bent outward, and the engaging claw 22b of the mounting column 22 is inserted. 3 and 4, the engaging claws 22 b of the respective mounting posts 22 are moved to the positions of the potting case 12 as shown in FIGS. 3 and 4. Engage with each engagement recess 12d.

  In this case, the engagement surface 22b1 of the engagement claw 22b of the mounting column 22 and the engagement surface 12d1 of the engagement recess 12d of the potting case 12 are in a horizontal state as shown in FIGS. Therefore, the electronic component unit 10 is prevented from being detached from the mounting posts 22. Therefore, the electronic component unit 10 can be reliably attached to the back surface of the operation panel 20 only by being pushed to the back side of the operation panel 20 while being positioned on the operation panel 20.

  Further, in the mounted state of the electronic unit 10, the engaging claws 22 b of the mounting columns 22 are positioned in the engaging recesses 12 d provided in the through holes 12 c of the potting case 12, and the engaging claws 22 b The head is buried from the surface on the back side of the potting case 12. For this reason, there exists a big advantage that the said electronic component unit 10 of the state attached to the back surface of the operation panel 20 does not enlarge.

  In the mounting structure according to the present invention, the engagement recess in the through hole 12c on the potting case 12 side constituting the electronic component unit 10 and the engagement claw of the mounting column 22 on the operation panel 20 side are shown in FIG. And it can change as shown in the modification of FIG.

  In the first modification shown in FIG. 5, the engagement recess 12 e provided in the through hole 12 c of the potting case 12 has an engagement surface 12 e 1 formed as an inclined surface, and the panel body 21 of the operation panel 20. The engaging claw 22c of the mounting support column 22 provided on is formed with an inclined surface whose engaging surface 22c1 faces the engaging surface 12e1. For this reason, in a state where the engaging claw 22c of the mounting column 22 is engaged with the engaging recess 12e of the potting case 12, both the engaging surfaces 12e1 and 22c1 are in the longitudinal direction of the through hole 12c and the direction perpendicular thereto. Is engaged. For this reason, the electronic component unit 10 can prevent rattling in the lateral direction orthogonal to the through hole 12.

  In the second modification shown in FIG. 6, the engagement recess 12f provided in the through hole 12c of the potting case 12 has an engagement surface 12f1 formed in a horizontal plane, and the panel body of the operation panel 20 The engaging claw 22d of the mounting column 22 provided on 21 is formed in an acute angle shape with its tip side projecting toward the engaging surface 12f1 of the engaging recess 12f of the potting case 10, and In a state where the engagement claw 22d is engaged with the engagement recess 12f of the potting case 12, the tip of the engagement claw 22d is in a state of being bitten into the engagement surface 12f1 of the engagement recess 12f. Therefore, both the engaging surfaces 12f1 and 22d1 are engaged in the longitudinal direction of the through hole 12c and the direction orthogonal thereto. For this reason, the electronic component unit 10 can prevent rattling in the lateral direction orthogonal to the through hole 12.

It is the perspective view seen from the back part side of the operation panel which attached the electronic component unit. It is the perspective view seen from the front side of the electronic component unit. It is the longitudinal cross-sectional view seen from the arrow 3-3 line direction of FIG. 1 which shows the attachment state of an electronic component unit and an operation panel. It is the elements on larger scale which show the engagement state of the engagement recess by the side of a potting case, and the engagement nail | claw of the attachment support | pillar by the side of an operation panel. It is the elements on larger scale which show the 1st modification of the engagement state of the engagement recess by the side of a potting case, and the engagement nail | claw of the attachment support | pillar by the side of an operation panel. It is the elements on larger scale which show the 2nd modification of the engagement state of the engagement recessed part by the side of a potting case, and the engagement nail | claw of the attachment support | pillar by the side of an operation panel.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Electronic component unit, 11 ... Printed board, 12 ... Potting case, 12a ... Case main body, 12a1 ... Positioning hole, 12b ... Cylindrical body, 12c ... Through-hole, 12d, 12e, 12f ... Engaging recess, 12d1, 12e1, 12f1 ... engaging surface, 13 ... potting agent, 14 ... push button switch, 15 ... indicator lamp, 20 ... operation panel, 21 ... panel body, 22 ... mounting column, 22a ... column body, 22b, 22c, 22d ... engaging claws, 22b1, 22c1, 22d1.

Claims (4)

A structure for mounting an electronic component unit to an operation panel for mounting an electronic component unit that is potted with a potting agent in a state where a printed board on which one or more electronic components are mounted is accommodated in a potting case. And the mounting structure includes a plurality of mounting columns that are erected on the operation panel at a position where the electronic component unit is arranged, and a plurality of through holes provided in the potting case of the electronic component unit. An attachment structure for attaching the electronic component unit to the operation panel by engaging an engaging claw provided at the tip of the potting case with an opening side portion of the through hole of the potting case, wherein the opening in the through hole of the potting case The end is provided with an engagement recess having a predetermined depth, and the engagement claw is Mounting structure for an operation panel of the electronic component unit, characterized in that they are buried in a state engaged with the engagement recess from the position of the surface of the potting case. 2. The structure for mounting an electronic component unit to an operation panel according to claim 1, wherein both engaging surfaces in which the engaging claws of the mounting column and the engaging recess of the potting case engage with each other are formed in a substantially horizontal plane. A structure for mounting an electronic component unit to an operation panel. 2. The mounting structure for an operation panel of an electronic component unit according to claim 1, wherein both engaging surfaces in which the engaging claw of the mounting column and the engaging recess of the potting case engage with each other are formed as inclined surfaces. In addition, the mounting structure for the operation panel of the electronic component unit is characterized in that both the engaging surfaces are also engaged in a direction perpendicular to the through hole. 2. The mounting structure for an operation panel of an electronic component unit according to claim 1, wherein a distal end side of an engaging claw of the mounting column is formed in an acute angle shape protruding toward an engaging surface of an engaging recess of the potting case. The leading end side of the engaging surface of the engaging claw bites into the engaging surface of the engaging recess of the potting case, and these engaging surfaces are also engaged in the direction perpendicular to the through hole. A structure for mounting an electronic component unit to an operation panel.

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