JP3093877U - PCB mounting structure for electrical equipment - Google Patents

Abstract

(57) [Summary] [Problem] Even if a front panel having a conventional configuration is used as it is when a design of an electric device is changed, warping deformation of a front end portion of a board at a mounting position of a tact switch is suppressed,
At the same time, the interval between the tact of the tact switch and the pressing operation piece can be maintained as designed. SOLUTION: A front end portion 21 of a substrate is disposed on a back portion of a front panel 1 of an electric device equipped with an operation button 4. The tact 31 of the tact switch 3 is arranged below the push-down operation piece 41 connected to the operation button 4. When the operation button 4 is pushed in, the push-down operation piece 41 moves downward to push down the tact 31. An operation button 4 and a push-down operation piece 41 are attached to an upward piece 43 fixed to the front panel 1.
And the protruding piece 46 are continuously provided. The protruding piece 46 is superimposed on the body 32 of the tact switch 3 mounted on the front end 21 of the board.

Description

[Detailed description of the device]

[0001]

[Technical field to which the device belongs]

  The present invention is applied to a board mounting structure of an electric device, particularly a magnetic recording / reproducing device or a television receiver. Like the image machine, it works in conjunction with the push-in operation of the operation buttons on the front panel. , The tact of the tact switch mounted on the board can be pushed down. The present invention relates to a board mounting structure for an electric device.

[0002]

[Prior art]

  For example, in a magnetic recording / reproducing device, a tact switch is installed inside the cabinet. The mounted board is installed in a state where it is attached to the deck. This tact switch The tact is pushed in conjunction with the pushing operation of the operation button equipped on the front panel. In order to be able to lower the Mounted on the front end of the board to be placed near the operation button and close to the operation button The tact of the tact switch is installed under the push-down operation piece connected to the Of the tact switch by the downward movement of the pressing operation piece that is interlocked with the pressing operation of Keeping the tact down allows you to keep down the number of parts and It is an effective measure to simplify the assembly process.

[0003]   On the other hand, the substrate is made of a flexible material, In addition, a wide variety of electronic and electrical parts are installed, and heavy parts are Because it tends to be mounted near the end, When installed, the lateral center of the front end, where the tact switch is mounted, is the upper side. May cause warp deformation such as bulging. And such warp deformation Is on the board, the above operation buttons installed on the front panel The distance between the pressing operation piece and the tact switch tact becomes smaller than the design value, When the operation button is pushed in, the click feeling is impaired, or in the worst case, the touch The tact switch is pressed down and the operation piece remains pushed in. Could be left on.

[0004]   Therefore, conventionally, as shown in FIG. 3 or FIG. Was proposed.

[0005]   The mounting structure shown in FIG. 3 is mounted on the front panel 1 forming part of the cabinet. The board pressing piece 12 extending rearward is integrally molded, and the board pressing piece 12 is By superimposing it on the upper surface of the board front end portion 21, the board front end portion 21 is prevented from moving upward. The tact switch mounted on the front end 21 of the substrate by suppressing the deformation. The interval a between the tact 31 of No. 3 and the push-down operation piece 41 integrated with the operation button 4 is set to the design value. It is intended to keep (see, for example, Patent Document 1).

[0006]   The mounting structure shown in FIG. 4 is provided on the operation button 4 mounted on the front panel 1. The push-down operation piece 41 and the board holding piece 42 are integrally formed with a constant space. By stacking the substrate pressing piece 42 on the upper surface of the substrate front end portion 21, In addition to suppressing upward warp deformation of the portion 21, the upper surface of the board front end portion 21 is pressed against the upper surface. The space b with the lowering operation piece 41 is kept constant, and by doing so, the board front end portion 21 Push down the tact 31 of the tact switch 3 and the operation button 4 mounted on the It is intended to keep the distance a from the operation piece 41 at a design value (see Patent Document 1, for example). See).

[0007]

[Patent Document 1]   Utility model registration No. 3075164

[0008]

[Problems to be solved by the device]

  By the way, in an electric device such as a magnetic recording / reproducing apparatus, the front part The design change that the channel 1 is diverted as it is and the substrate 2 is miniaturized may be performed. However, such miniaturization of the substrate 2 tends to be performed every time the design is changed. And In the miniaturized board 2, the position of its front end portion 21 is rearward of the previous position. It may be set in the retracted position.

[0009]   In such a case, like the mounting structure described in FIG. 3, it is integrated with the front panel 1. The warp deformation of the front end portion 21 of the substrate 2 which is miniaturized by utilizing the substrate pressing piece 12 molded in Even if you try to follow the idea of suppressing the shape, the front panel 1 The length of the holding board pressing piece 12 is too short to reach the front end 21 of the board. Such a situation can occur. Therefore, by extending the length of the board pressing piece 12, the board front end portion 2 Although it is possible to stack it on the upper surface of 1, In order to increase the length, it is necessary to change the shape of the mold for molding the front panel 1. If so, the mold for molding the front panel 1 is large. Therefore, the manufacturing cost of the front panel 1 is significantly increased and the cost is reduced. There is a problem that the intention of the design change, which is one of the above, is lost.

[0010]   On the other hand, as described with reference to FIG. 4, the substrate pressing piece 12 formed integrally with the operation button 4 By overlapping the upper surface of the substrate front end portion 21 with the upper surface of the substrate front end portion 21. In addition to suppressing the warp deformation, the upper surface of the substrate front end portion 21 and the pressing operation piece 41 are If the idea of keeping the distance b between is constant, the front end of the board Even if the position of 21 is set to the position retracted rearward from the previous position, The operation button 4 is integrally formed with the board pressing piece 12 and the pressing operation piece 41. Since the mold for molding is smaller than the mold for molding the front panel 1, A configuration in which the length of the plate pressing piece 12 is extended and overlapped on the upper surface of the board front end portion 21. It doesn't cost much to hire Problem that the intention of design change whose purpose is Yes.

[0011]   However, when the structure described in FIG. 4 is adopted, the upper surface of the substrate front end portion 21 is There are places where it is not preferable to overlap the substrate pressing pieces 12. Therefore, There is a restriction on the overlapping position of the board pressing piece 12 on the upper surface of the board front end portion 21, and It is necessary to set the mating location at a location relatively far from the mounting location of the tact switch 3. You may not get it. In such a case, the mounting location of the tact switch 3 It is possible to reliably suppress the warp deformation of the board front end portion 21 due to the board pressing piece 12. It becomes difficult to set the space a between the tact 31 of the tact switch 3 and the push-down operation piece 41. There is a problem that it may not be a measured value.

[0012]   The present invention has been made in view of the above problems, and when the design is changed, the conventional size is required. Not only can the front panel of the legal configuration be used as is, but In addition to being able to suppress warp deformation of the mounting location of the tact switch , Design distance between tact of tact switch and push-down operation piece integrated with operation button The purpose is to provide a board mounting structure for electrical equipment that can be reliably maintained as To do.

[0013]   In addition, the present invention provides an operation button for downsizing the board due to future design changes. A board mounting structure for electrical equipment that can be dealt with without changing the shape of the mold for molding. The purpose is to provide a structure.

[0014]

[Means for Solving the Problems]

  The board mounting structure of the electric device according to the present invention is provided in front of the board on which the tact switch is mounted. The end of an electric device equipped with operation buttons for operating the tact switch. By arranging it on the back of the front panel, the push button that is linked to the above operation buttons The tact of the tact switch described above is arranged under the operation piece, and the operation button is pushed in. The tact of the tact switch is changed by the downward movement of the pressing operation piece linked to the operation. It can be pushed down. Then, keep a certain distance from the above push-down operation piece. Lever is attached to the upper surface of the body of the tact switch. Overlaid.

[0015]   With this configuration, it is connected to the operation button at a certain distance from the pressing operation piece. The protruding piece is superposed on the upper surface of the tact switch body. , The protruding piece that is superimposed on the upper surface of the tact switch body mounts the tact switch. In addition to helping to prevent warpage deformation of the front end of the mounted substrate, Even if the front end is warped, the distance between the protruding piece and the pressing Since it is fixed, the interval between the tact switch tact and the push-down operation piece is the design value. Kept on the street.

[0016]   In the present invention, the protruding piece is a length that protrudes rearward from the body of the tact switch. It is desirable to have According to this, the board is small due to future design changes. Even if the design is such that the position of the front end of the board is lowered to the rear, Mold the operation button so that it can be overlapped with the body of the switch There is no need to change the shape of the mold.

[0017]   In the present invention, the protruding pieces are two adjacent ones arranged side by side on the substrate. Adopted a structure that is overlapped on both the upper surface of the body of the tact switch According to this, the interval between two adjacent tact switches is narrow. However, it is possible to suppress warpage deformation of the front end of the board without difficulty with a small number of protruding pieces. It is also possible, and at the same time, the interval between the tact of the tact switch and the push-down operation piece is set to the design value. Makes it easy to keep on the street.

[0018]   In the present invention, the operation button is overlapped with the front end of the board so that the front position of the board is The tact to a proper position with respect to the push-down operation piece by restricting It is desirable that the positioning pieces to be installed are connected in series. According to this, the front end of the substrate The tact can be positioned at the proper position with respect to the push-down operation piece simply by abutting the To be decided

[0019]   In the present invention, the front end of the board on which the tact switch is mounted is Deployed on the back of the front panel of electrical equipment equipped with operation buttons for operating The tact on the lower side of the push-down operation piece connected to the operation button. The tact of the switch is provided, and the above-mentioned push-down operation is linked to the push-in operation of the operation button. The tact of the tact switch can be pushed down by the downward movement of the work piece. In the board mounting structure of the electrical equipment, the On the upward piece extending upward from the fixed portion, the operation button, the pressing operation piece, The push-down operation piece and a protruding piece that is located at a fixed interval are connected to each other, A piece is superposed on the upper surface of the body of the tact switch, and the protruding piece is It has a length that protrudes rearward from the body of the tact switch, and Of the body of two adjacent tact switches, one of which is arranged side by side on the substrate. Stacked on both sides of the upper surface, overlap the protruding piece, the operation button, and the front edge of the board. The tact is pushed down by controlling the front position of the board in line with each other. Positioning pieces that are positioned at appropriate positions with respect to one piece are arranged in series. It is possible to adopt. The operation of this configuration will be described with reference to the embodiment described below. To clarify.

[0020]

[Embodiment of device]

  FIG. 1 is a perspective view schematically showing a main part of a board mounting structure of an electric device according to the present invention. 2 is a vertical cross-sectional side view of the main part including the front panel 1.

[0021]   1 and 2, the front panel 1 has a boss 13 protruding rearward. The upward piece 43 fixed to the boss 13 extends upward from the fixing portion 44. ing. The upward piece 43 is provided with the operation button 4 at the upper end. . Further, the push-down operation piece 41 is continuously provided near the lower end of the upward piece 43, and A projecting piece 46 is connected to the lower end of the facing piece 43. Then, with the push-down operation piece 41 The projecting pieces 46 are parallel to each other, and their facing intervals in the vertical direction are fixed. ing. A positioning piece 47 is projected downward from the base of the protruding piece 46. It

[0022]   The board 2 having the tact switch 3 mounted on the front end 21 is mounted on a deck (not shown). It is attached to the front panel 1 from the back of the front panel 1 together with the deck. When inserted toward the front panel 1, the board front end portion 21 projects into the positioning piece 47. The front position of the substrate 2 is restricted by hitting, and the tact 31 of the tact switch 3 is pushed down. The operation piece 41 is positioned at an appropriate position. In addition, the protruding piece 46 is tactos It overlaps the upper surface 33 of the body 32 of the switch 3.

[0023]   In the board mounting structure of this configuration, the front panel 1 faces the front through the opening 14. When the operation button 4 that is being pushed in is pushed in, the upward piece 43 is at the same level as the fixing portion 44. It is flexed and deformed rearward around the root 48 located at When the operation piece 41 moves downward, the tact switch is pressed by the pressing operation piece 41. The tact 31 of the chi 3 is pushed down. In addition, release the pushing force for the operation button 4. Then, the upward piece 43 is returned and deformed together with the push-down operation piece 41, and the tact 31 is removed. Return to the original position.

[0024]   In the board mounting structure having the above-described configuration and exerting its action, the board front end portion 21 Irrespective of whether or not the warp deformation has occurred, the push-down operation piece 41 and the protruding piece 46 The distance A in the vertical direction is kept constant. Therefore, it is mounted on the board front end 21. Also, the distance a between the tact 31 of the tact switch 3 and the push-down operation piece 41 is set to The plate front end 21 is kept constant regardless of whether or not the plate is warped. did As a result, the front end 21 of the substrate is warped and deformed. There is room for the situation in which the distance a between 1 and the push-down operation piece 41 does not reach the design value. Absent. As a result, the click feeling when pressing the operation button 4 is impaired, or The situation where the lowering operation piece 41 keeps pressing down the tact 31 does not occur.

[0025]   In addition, in this case, the protruding piece 46 connected to the operation button 4 is the tact switch. Since it is superposed on the upper surface 33 of the body portion 32 of No. 3, the protruding piece 46 is This helps to prevent the warp deformation of the board front end 21 at the mounting position of the switch 3. Also, it is possible to keep the distance a between the tact 31 and the push-down operation piece 41 as designed. Be useful.

[0026]   As shown in FIG. 1 or FIG. 2, in this embodiment, the protruding piece 46 of the tact switch 3 is It has a length protruding rearward from the body portion 32. Therefore, for future design changes Therefore, there is no design that the board 2 is downsized and the position of the board front end portion 21 is lowered rearward. However, the protruding piece 46 can be superposed on the body portion 32 of the tact switch 3. Even if such a design change is made in the future, the push-down operation will become possible. Change the shape to a mold for molding the operation button 4 including the piece 41 and the protruding piece 46 There is no need to add. Therefore, in order to reduce the size of the substrate 2, the front panel There is an advantage that it is possible to divert 1 and the operation button 4 as they are.

[0027]   Further, in this embodiment, as shown in FIG. 1, one protruding piece 46 is used as the substrate front end portion 2. 1, the body portions 32 of the two tact switches 3 and 3 which are adjacent to each other and which are arranged side by side. It is superposed on both upper surfaces 33, 33 of 32. Therefore, two adjacent Even if the interval between the tact switches 3 and 3 is small, it is impossible due to the small number of protruding pieces 46. It is possible to suppress the warp deformation of the front end portion 21 of the substrate, and at the same time, It is easy to keep the distance between the tact 31 of the switch 3 and the push-down operation piece 41 as designed. Is.

[0028]   1 to 4, the same reference numerals are given to the same or corresponding parts for explanation. Avoid duplication.

[0029]

[Effect of device]

  As described above, according to the present invention, when changing the design, the front of the conventional dimensional configuration is used. Even if the panel is used as it is, the protruding piece integrated with the operation button is mounted on the front end of the board. On the upper surface of the body of the tact switch In addition to suppressing the warp deformation of the mounting part, the front end of the substrate is warped Whether or not the tact switch has a tact switch and operation button Make sure to keep the gap with one piece according to the design value. However, there is no cost, and the click feeling when pressing the operation button is set. It is performed as expected, and switching by pressing the operation button is also reliably performed. The effect of becoming like this is obtained.

[0030]   Also, the protruding piece has a length that protrudes rearward of the body of the tact switch. Then, in order to mold the operation button against the miniaturization of the board due to future design changes It has the advantage that it can be dealt with without changing the shape of the mold.

[Brief description of drawings]

FIG. 1 is a perspective view schematically showing a main part of a board mounting structure for an electric device according to the present invention.

FIG. 2 is a vertical sectional side view of the main part including a front panel.

FIG. 3 is a sectional view of a conventional example.

FIG. 4 is a sectional view of another conventional example.

[Explanation of symbols]

1 Front panel 2 substrates 3 tact switch 4 operation buttons 21 board front edge 31 tact 32 torso 41 Push-down operation piece 43 Upward piece 44 Fixed part 46 protruding piece 47 Positioning piece

Claims (5)

[Scope of utility model registration request] 1. A front end portion of a board on which a tact switch is mounted is arranged on a back portion of a front panel of an electric device equipped with an operation button for operating the tact switch, so that the front end portion is connected to the operation button. The tact of the tact switch is provided below the pressing operation piece, and the tact of the tact switch is pressed down by the downward movement of the pressing operation piece that is interlocked with the pressing operation of the operation button. In the board mounting structure, the operation button, the push-down operation piece, and the push-down operation piece, which are fixed to the front panel and extend upward from the fixed portion, are spaced apart from each other by a predetermined distance. The tact switch body, and the projecting piece is superposed on the upper surface of the body of the tact switch. Has a length projecting more rearward than this, and this projecting piece is superposed on both of the upper surfaces of the trunks of two adjacent tact switches arranged side by side on the substrate. An electric device characterized in that the operation button is provided with a positioning piece that overlaps with a front end of the board and restricts a front position of the board to position the tact at an appropriate position with respect to the push-down operation piece. Board mounting structure. 2. A front end portion of a board on which a tact switch is mounted is arranged on a back side of a front panel of an electric device equipped with an operation button for operating the tact switch so that the front end portion is connected to the operation button. The tact of the tact switch is provided below the pressing operation piece, and the tact of the tact switch is pressed down by the downward movement of the pressing operation piece that is interlocked with the pressing operation of the operation button. In the board mounting structure, a protruding piece connected to the operation button at a constant distance from the pressing operation piece is superposed on the upper surface of the body of the tact switch. Board mounting structure. 3. The board mounting structure for an electric device according to claim 2, wherein the projecting piece has a length projecting rearward of a body of the tact switch. 4. The electric device according to claim 2 or 3, wherein the projecting piece is superposed on both upper surfaces of the trunks of two adjacent tact switches arranged side by side on the substrate. Board mounting structure. 5. The operation button is further provided with a positioning piece which overlaps with a front end of the board and restricts a front position of the board to position the tact at an appropriate position with respect to the push-down operation piece. A board mounting structure for an electric device according to any one of claims 2 to 4.