JPH0451512Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial field of application] The invention provides a single circuit sheet in which an upper sheet and a lower sheet are arranged with an insulating spacer interposed therebetween.
The present invention relates to a thin assembled electrical component equipped with a plurality of electrical components having different functions, such as a push-type electrical component, a rotating electrical component, and a sliding electrical component.

[Conventional technology]

For example, the control panels of electronic devices such as VTRs and microwave ovens have push switches, slide switches, or rotary variable resistors.
A large number of various electrical components with different functions are installed. In recent years, miniaturization and thinning of these electronic devices have become one of the most important technical issues, and along with this, there is a strong demand for the integration and thinning of the various electrical components mentioned above. ing.

In order to meet such technical demands, the applicant of the present application previously proposed a thin integrated electrical component in which the wiring patterns of these various electrical components were printed on a single circuit sheet (Utility Application No. 59-181554). ).

8 to 10 are views showing the previously proposed thin integrated electric component, in which FIG. 8 is a cross-sectional view of the push switch forming part, and FIG. 9 is a cross-sectional view of the rotary variable resistor forming part. 10 are cross-sectional views of the slide switch forming portion.

In these figures, 31 is a circuit sheet, 32
is a fixing plate attached to the back side of the circuit sheet 31,
An upper support plate 33 attached to the front side of the circuit sheet 31 is a control panel of an electronic device equipped with this thin electrical assembly.
The circuit sheet 31 has an insulating spacer 36 sandwiched between an upper sheet 34 and a lower sheet 35.
It has a layered structure.

In the push switch forming section, as shown in FIG. 8, an upper electrode 37 and a lower electrode 38 are formed on the opposing surfaces of the upper sheet 34 and the lower sheet 3, which are arranged on both sides with an insulating spacer 36 in between. The upper sheet 34 corresponding to the upper electrode 37
A protrusion 41 of an operator 40 attached to the control panel 33 is brought into contact with the front surface of the control panel 33 via a tact spring 39.

Further, in the rotary variable resistor forming section, as shown in FIG. 9, a predetermined current collection layer 42 and a resistance layer 43 are formed on the lower sheet 35,
A through hole 44 is formed at a position corresponding to a region including the current collecting layer 42 and the resistance layer 43 of No. 4. Then, the slider 46 of the operator 45 attached to the control panel 33 is inserted into the lower sheet 35 side through the through hole 44, and the slider 46, the current collecting layer 42, and the resistance layer 43 are slid together. be touched.

Furthermore, in the slide switch forming part,
As shown in FIG. 10, predetermined electrodes 47, 48 are formed on the lower sheet 35, and a through hole 49 is opened at a position facing the area of the upper sheet 34 containing the electrodes 47, 48. Then, the slider 51 of the operator 50 mounted on the control panel 33 is inserted through the through hole 49 toward the lower sheet 35 side, and the slider 51 and the electrodes 47 and 48 are brought into sliding contact.

In this way, the thin assembled electric component previously proposed by the applicant of the present application has a current collecting layer 4 in a rotary variable resistor.
2, the resistive layer 43, and the circuit patterns such as the electrodes 47 and 48 of the slide switch are printed on the lower sheet 35, so conventional rotary type electrical components and sliding type electrical components formed in so-called discrete shapes can be used. Electrical components can be much more integrated and thinner than in the conventional case.

[Problems with conventional technology]

By the way, in conventionally known membrane switches and the like, the upper sheet and lower sheet constituting the circuit sheet are made of PET (polyethylene terephthalate), and the electrodes 37 and 38 are made of thermoplastic resin such as vinyl chloride and carbon, etc. It is made of a circuit pattern material mixed with conductive particles. However, regarding parts that are subject to wear by sliders, such as current collecting layers, resistance layers, and electrodes in rotating and sliding electrical components,
The circuit pattern material is easily peeled off and has problems in terms of durability.

This problem can be solved by using heat-resistant resin films such as polyimide resin as the upper and lower sheets, and printing and baking a heat-resistant circuit pattern material made by mixing conductive particles with heat-resistant resin such as phenol resin or polyimide resin. This can be solved by doing as follows.

However, there is a problem in that heat-resistant resin films such as polyimide are much more expensive than non-heat-resistant resin films such as PET.

[Means for solving problems]

The present invention solves the problems of the prior art and provides a thin electrical component assembly that is inexpensive and highly reliable. At the same time as opening a hole, a concave portion is provided at a position corresponding to the through hole in a fixing plate attached to one side of the circuit sheet,
A circuit board on which a circuit pattern on which sliders of a rotary type electric component and a slide type electric component slide is formed is fitted into the recessed part, and a terminal portion of the circuit pattern and a circuit formed on the circuit sheet are fitted. It is characterized in that the terminal portion of the pattern is electrically connected.

[Effect]

With the above configuration, a heat-resistant circuit pattern made of a mixture of heat-resistant resin such as phenol resin and conductive particles is formed on a substrate made of Bakelite, for example, as a circuit board applied to rotating electric components and sliding electric components. Printed and fired circuit boards, which were used in conventional discrete electrical components, can now be used as is, improving durability and making circuit sheets made of non-heat-resistant resin films such as PET. Therefore, it can be manufactured at low cost.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is an exploded perspective view showing the overall structure of the present invention, in which 1 is a display panel, 2 is an operator for a push-type electrical component, 3 is an operator for a rotating electrical component, and 4 is an exploded perspective view showing the overall configuration of the present invention.
Reference numeral 1 indicates an operator for the sliding electric component, 5 an upper support plate, 6 a circuit board for the rotating electric component, 7 a circuit board for the sliding electric component, 8 a circuit sheet, and 9 a fixed plate.

The display panel 1 is made of a thin metal plate such as steel, and has a plurality of through holes 1a and a plurality of legs 1b formed around the periphery.

A plurality of push-type electric component operators 2 are grouped into one group and hingedly engaged with two connecting pieces 2a, and each of these operators 2 is connected to the through hole 1a.
It is exposed to the outside of the display panel 1 through.

The operator 3 of the rotary electric component includes a cylindrical knob portion 3a and a disc-shaped receiving portion 3b, and the knob portion 3a is exposed to the outside of the display panel 1 through the through hole 1a. ing. In addition, the receiving part 3b
A slider 10 is fused to the lower surface of the slider.

Similarly, the slide-type electric component operator 4 includes a prismatic knob portion 4a and a rectangular flat plate-shaped receiving portion 4b, and the knob portion 4a is exposed to the outside of the display panel 1 through the through hole 1a. A slider 11 is fused to the lower surface of the receiving part 4b.The upper support plate 5 is made of a thin metal plate such as steel, and the upper support plate 5 has each of the above-mentioned parts. Efforts have been made to engage and hold the operators 2, 3, and 4. That is, on the left side of the upper support plate 5, a plurality of circular operation holes 12 are provided by punching to correspond to the operation elements 2 of the push-type electric component, and a plurality of locking holes are provided near the operation holes 12. Claw 5a
is formed erect. By bending the locking claw 5a, the connecting pieces 2a are attached to the upper support plate 5.
As a result, the lower surface of each operator 2 is held by the upper support plate 5 so as to face into each operation hole 12.

Furthermore, two relatively large-diameter operating holes 13 are provided approximately in the center of the upper support plate 5 to correspond to the operating elements 3 of the rotary electric component. The operating hole 13 is formed by burring, and when the operating hole 13 is processed, an annular regulating wall 5b is provided around the operating hole 13 at the same time. Then, both the operators 3
is rotatably held by the upper support portion 5 by fitting its receiving portion 3b into both of these regulating walls 5b.

Further, on the right side of the upper support plate 5, a plurality of rectangular operation holes 14 are provided corresponding to the operation elements 4 of the sliding electric component. The operating holes 14 are formed by punching, and after the punching, regulating walls 5c are formed on two corresponding sides of each operating hole 14 by bending. Each of the operation holes 4 has its receiving portion 4b connected to these regulating walls 5c.
By fitting between them, it is held by the upper support plate 5 so as to be reciprocatingly movable.

Furthermore, a plurality of relatively small diameter positioning holes 5d are provided at predetermined positions on the upper support plate 5 by punching. Therefore, as is clear from the above description, all parts of the upper support plate 5 can be formed by press working.

In the circuit board 6 of the rotary electric component, a concentric conductive layer 6b is formed by printing and baking a heat-resistant circuit pattern material on one side of a circular Bakelite plate 6a. Moreover, the circuit board 7 of the sliding type electric component is made by baking a metal glaze on one side of a rectangular Bakelite plate 7a.
A linear conductive layer 7b is formed. As these circuit boards 6 and 7, conventional circuit boards for rotating electrical components and sliding electrical components, which are formed in a discrete manner, can be used as they are.

As shown in the development diagram in FIG. 2, the circuit sheet 8 is made by forming a desired circuit pattern on a base film made of a non-heat-resistant insulating film such as polyester by printing technology, and then attaching the contact portions of each circuit pattern. An insulating layer 15 serving as a spacer is applied and formed on the removed portion, and is folded in half at the line A-A in the figure. And the base film is A-
The upper part of line A becomes the lower sheet 16, and A-A
The lower part of the line becomes the upper sheet 17, which is folded in half along the A-A line to form a laminated structure in which the upper sheet 17 is stacked on the lower sheet 16 with the respective insulating layers 15 in between.

A plurality of lower electrodes 18 are provided on the left side of the lower sheet 16 as a push-type switch circuit pattern.
are provided at predetermined intervals, and a circular through hole 19 is provided approximately in the center for inserting a circuit board 6 and a slider 10 of a rotary electric component such as a rotary variable resistor or a rotary switch. Furthermore, a rectangular through hole 20 is provided on the right side for inserting a circuit board 7 and a slider 11 of a sliding type electrical component such as a sliding type switch or a sliding type variable resistor. On the other hand, a plurality of upper electrodes 21 are provided on the left side of the upper sheet 17 in correspondence with the lower electrodes 18, and the through hole 1 is provided approximately in the center of the upper sheet 17.
A substantially circular through hole 22 is provided corresponding to the hole 9, and a rectangular through hole 23 is provided on the right side corresponding to the rectangular hole 20. The through holes 22 and 23 opened in the upper sheet 17 are formed slightly smaller than the through holes 19 and 20 opened in the lower sheet 16, and as will be described in detail later, the through holes 22 and 23 opened in the lower sheet 16 Through holes 22 and 23 are formed in the upper sheet 17 at a part of the outer edge of the circuit boards 6 and 7 that are installed in the through holes 19 and 20.
The circuit patterns 6b, 7b formed on the circuit boards 6, 7 and the circuit pattern (not shown) printed on the upper sheet 17 can be electrically connected. ing. still,
In FIG. 2, reference numeral 24 indicates positioning holes opened at predetermined positions in the lower sheet 16 and the upper sheet 17.

Returning to FIG. 1, the fixing plate 9 is made of a thin metal plate such as steel, and has a circular board fitting part 25 recessed in a position corresponding to the circular operation hole 13 formed in the upper support plate 5. A rectangular board fitting portion 26 is recessed at a position corresponding to the rectangular operation hole 14 formed in the upper support plate 5. Furthermore, several positioning protrusions 9a are formed at predetermined positions on the lower support plate 9 by burring, and a number of mounting pieces 9b are formed upright on the peripheral edge.

Next, a process for assembling the control panel having the above configuration will be explained.

First, the circuit board 6 of the rotating electric component and the circuit board 7 of the sliding electric component are fitted into the board fitting parts 25 and 26 of the fixed plate 9.

Next, the circuit sheet 8 folded in half and the upper support plate 5 are sequentially placed on the fixed plate 9, and each mounting piece 9b of the fixed plate 9 is bent in the direction of the upper support plate 5 to integrate them. do. At this time, the relative positions of the upper support plate 5, the circuit sheet 8, and the fixing plate 9 are such that each positioning hole 24,
5d are inserted into each other, positioning can be performed with high accuracy.

At this time, as shown in FIG. 4 and FIG.
The circuit patterns 6b, 7b formed on the upper sheet 17 and the circuit pattern (not shown) printed on the upper sheet 17 are electrically connected via a heat seal or the like S.

Next, as shown in FIG. 3, a circular tact spring 25a made of an elastic thin plate is placed in each operation hole 12 for the push-type electrical components provided in the upper support plate 5, while each Both connecting pieces 2a are fixed to the upper support plate 5 by bending the retaining claws 5a, so that each operator 2 has its lower surface aligned with each tact spring 25.
It is held on the upper support plate 5 so as to be positioned on the upper surface of Further, as shown in FIG. 4, the operator 3 of the rotary electric component is rotatably inserted into the annular regulating wall 5b, and the slider 10 integrally fused to the operator 3 is inserted into the circuit sheet. It slides into contact with the circuit pattern 6b formed on the circuit board 6 through the through holes 19 and 22 formed in the circuit board 6. Further, as shown in FIG. 5, the operator 4 of the sliding electric component is movably inserted between the opposing regulating walls 5c, and the slider 11 integrally fused to the operator 4 is inserted into the circuit sheet 8
It slides into contact with the circuit pattern 7b formed on the circuit board 7 through the through holes 20 and 23 formed in the circuit board 7.

Finally, click springs 26a,
27 and place the display panel 1 on the upper support plate 5 so that a part of each operator 2, 3, 4 protrudes from each through hole 1a, and then each leg 1b of the display panel 1
The whole is integrated by bending it toward the lower surface of the fixing plate 9.

The control panel assembled in this way is used as a circuit board for rotating electrical components and sliding electrical components by printing and baking a heat-resistant circuit pattern material on one side of the Bakelite plates 6a and 7a, thereby forming a conductive layer 6b. , 7b are used, the conductive layers 6b, 7b will not be worn out even if the operators 3, 4 are operated repeatedly.
Excellent durability. In addition, parts to which frictional force does not act, such as the electrodes 18 and 21 of push-type electrical parts and circuit patterns not shown, can be formed by printing a conductive material such as carbon, so circuit sheets can be used. As the base film of No. 8, a non-heat resistant resin such as polyester can be used, and it can be implemented at a much lower cost than when a heat resistant resin is used. Furthermore, as the circuit boards 6 and 7, the circuit boards of rotating electrical components and sliding electrical components, which are conventionally manufactured in a discrete manner, can be used as they are, so from this point of view as well, implementation is possible at low cost. can.

Next, we will discuss the operation of each electrical component mentioned above in the third section.
This will be explained based on FIGS. 5 to 5.

First, in FIG. 3, when the operator 2 on the operating side of the push switch is pressed downward against the elastic force of the tact spring 25a, the operator 2 descends by a predetermined stroke using the connecting piece 2a as a fulcrum. The tact spring 25a is reversed, and as a result, the upper sheet 17 is deformed toward the lower sheet 16 under the pressure from the tact spring 25a, and the upper electrode 21 and the lower electrode 18 come into contact with each other, resulting in a switch-on state. Then, when the pressing force applied to the operator 2 is removed, the operator 2, the tact spring 25a, and the upper sheet 17 return to their original positions, thereby causing the upper electrode 21 and the lower electrode 18 to separate, resulting in a switch-off state. .

On the other hand, in FIG. 4, when the knob 3a of the operator 3, which is the operating side of the rotary electric component, is rotated,
The slider 10 fused to the lower surface of the receiving portion 3b of the operator 3 rotates and slides on the circuit pattern 6b formed on the circuit board 6, thereby causing a resistance value change or The on/off switching operation of the switch can be obtained. At this time, the outer peripheral surface of the receiving part 3b of the operator 3 rotates along the inner peripheral surface of the regulating wall 5b of the upper support plate 5, and the clearance between the operating element 3 and the lower seat 16 is determined by the bottom surface of the receiving part 3b. Since the protrusion 3c formed on the periphery maintains a constant distance, the operator 3 can be rotated vertically and horizontally without wobbling. In addition, in this example,
The protrusion 3c and the through hole 22 are arranged so that the protrusion 3c slides on the upper sheet 17 outside the through holes 19 and 22.
Since the dimensions of each of the protrusions 3c are set,
does not slide on the circuit pattern 6b of the circuit board 6, and therefore, accidents such as disconnection or short circuit of the circuit pattern 6b can be prevented. Further, the click spring 26 attached to the upper surface of the receiving portion 3b of the operator 3 engages and disengages from the click groove 1c formed at a predetermined position on the display panel 1 as the operator 3 rotates. The operator operating the control element 3 can recognize the rotational position of the control element 3 as a click sensation.

Furthermore, in FIG. 5, when the knob 4a of the operating element 4, which is the operating side of the sliding electric component, is moved back and forth, the slider 11 fused to the lower surface of the receiving part 4b of the operating element 4 is attached to the circuit board 7. It slides on the formed circuit pattern 7b, thereby achieving a change in resistance value or an on/off switching operation of the switch corresponding to the amount of slide of the operator 4. At this time, the opposing outer surfaces of the receiving portion 4b of the operator 4 are connected to the upper support plate 5.
It reciprocates along the inner surfaces of both regulating walls 5c, and the clearance between the operator 4 and the lower seat 14 is maintained at a constant distance by the protrusions 4c formed at both ends of the bottom surface of the receiving part 4b. The operator 4 can be slid in the vertical and longitudinal directions without wobbling.
In addition, since the protrusion 4c slides on the upper sheet 17 around the through hole 23 similarly to the protrusion 3c of the operator 3 described above, the protrusion 4c allows the circuit board 7
It is possible to prevent an accident in which the circuit pattern 7b is disconnected or short-circuited. Further, the click spring 27 attached to the upper surface of the receiving portion 4b of the operator 4 engages and disengages from the click hole 1d formed at a predetermined position on the display panel as the operator 4 moves back and forth. The slide position of the operator 4 can be recognized as a click sensation.

Note that the rotating electrical component and the sliding electrical component in the above embodiments are not limited to switches, but may also be variable resistors.

Furthermore, in the above embodiment, a case was explained in which only push-type electrical components, rotary-type electrical components, and slide-type electrical components were mounted on the circuit sheet 8 and the fixed plate 9, but the gist of the present invention is limited to this. It is of course possible to mount various chip parts together with the above-mentioned electrical parts. In this case, as shown in Figures 6 and 7, 1
A plurality of chip components 28 are placed on the circuit board 2 in advance.
9, and this circuit board 29 is assembled onto the fixed plate 9 in the same manner as the circuit board 6 of the rotary type electric component and the circuit board 7 of the sliding type electric component.

In the control panel assembled in this way, the chip components 28 can be mounted on the circuit board 29 with high density, so the mounting efficiency when mounting the chip components using an automatic mounter can be increased. . Furthermore, since the chip components 28 are not directly mounted on the circuit sheet 8, no heat is applied to the circuit sheet 8 for mounting the chip components. Therefore, an inexpensive film such as PET can be used as the base film constituting the circuit sheet 8, and the manufacturing cost of the thin electrical assembly can be reduced.

[Effect of idea]

As explained above, the thin electrical assembly of the present invention has a rotating electrical component, a sliding electrical component, or a circuit board of a chip component inserted between the circuit sheet and the lower support plate, so it is different from the conventional one. Compared to thin integrated electrical components that use discrete components,
The overall thickness can be made much thinner. In addition, since circuit patterns for rotating or sliding electrical components are not formed directly on the circuit sheet, a non-heat-resistant film such as PET can be used as the base film for the circuit sheet, and polyimide It can be carried out at a lower cost than when using a heat-resistant film such as . Furthermore, as the circuit boards for rotating and sliding electrical components, the circuit boards for these electrical components, which are manufactured in conventional discrete formats, can be used as they are, so from this point of view as well, it can be implemented at low cost. It is possible to provide a thin assembled electric component that can be used in various ways and has excellent durability.

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view showing an embodiment of the thin electrical assembly according to the present invention, FIG. 2 is a developed view showing an example of a circuit sheet applied to the thin electrical assembly of the invention, and FIG. The figure is a cross-sectional view of a push type electric component forming part, FIG. 4 is a cross-sectional view of a rotary type electric component forming part,
FIG. 5 is a cross-sectional view of the sliding electric component forming section, FIG. 6 is a perspective view of a circuit board on which one chip component is mounted, and FIG. 7 is a perspective view of a circuit board on which multiple chip components are formed. , FIG. 8 is a cross-sectional view showing a push-type electrical component forming part of a conventionally proposed thin assembled electrical component, FIG. 9 is a cross-sectional view of a conventional rotary-type electrical component forming part, and FIG. 10 is a conventional slide. FIG. 3 is a cross-sectional view of the mold electrical component forming section. DESCRIPTION OF SYMBOLS 1...Display panel, 2...Operator for push-type electrical components, 3...Controller for rotating electrical components, 4...
...Operator for sliding type electrical components, 5... Upper support plate, 6... Circuit board for rotating electrical components, 7... Circuit board for sliding type electrical components, 8... Circuit sheet, 9... Fixed plate, 25, 26... Recessed portion for board fitting.

Claims (1)

[Scope of utility model registration request] A thin assembly consisting of multiple electrical components with different functions, such as push-type electrical components, rotary-type electrical components, sliding-type electrical components, etc., on one circuit sheet in which an upper sheet and a lower sheet are arranged with an insulating spacer in between. In the electrical component, through-holes are provided in the rotating electrical component setting section and the sliding electrical component setting section of the circuit sheet, and at positions corresponding to the through-holes of the fixed plate attached to the back side of the lower sheet. A recessed portion is provided in the recessed portion, and a circuit board on which a circuit pattern on which a slider of a rotating type electric component or a sliding type electric component slides is formed is fitted into the recessed portion,
A thin electrical assembly, characterized in that terminal portions of the circuit pattern and terminal portions of the circuit pattern formed on the circuit sheet are electrically connected.