JPH0614585B2 - Electrical wiring board - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an electric wiring board used for mounting and wiring components of electric equipment.

[Background technology]

In order to simplify wiring between parts, an electric wiring board having a conductive plate molded with resin is often used in electric devices. For the purpose of further simplifying the wiring between the parts, it is bent so as to extend from the conductive plate and rise up to about 90 ° with respect to the conductive plate, and at least a part of the bent part is projected from the resin. Electric wiring boards have been developed. The bent portion is used as a contact plate of a switch mechanism or a terminal plate. However, this electric wiring board has the following problems. That is, in order to prevent the holding strength of the base portion of the bent portion from becoming weak, when the base portion of the bent portion is resin-molded to have a structure in which the holding strength is improved, etc. Since there is variation in manufacturing, there is a problem that when the thickness of the conductive plate is thin, a gap is created between the mold and the bent portion of the conductive plate, and the resin flows out from this gap toward the protruding portion. In this way, when the resin flows out, the supporting position of the bent portion is displaced from the predetermined position (the desired supporting dimension cannot be obtained), or the protruding portion is covered with the resin, and the bent portion is covered with the contact plate of the switch mechanism. When it is used as, for example, inconvenience such as poor contact occurs.

[Object of the Invention]

The present invention has been made in view of the above circumstances, and an object thereof is to provide an electric wiring board in which there is almost no possibility that the protruding portion of the bent portion will be covered with resin.

[Disclosure of Invention]

In order to achieve the above-mentioned object, the present invention is characterized in that a conductive plate for electric wiring is molded with resin, and has a bent portion that extends from the conductive plate and is bent to rise up with respect to the conductive plate. The gist of the electrical wiring board is that at least a part of the portion is projected from the resin, and the bent portion is bent so as to be inclined with respect to the conductive plate at a right angle.

The present invention will be described in detail below.

1 and 3 to 6 show an electric wiring board according to the present invention. As shown in the drawing, the electric wiring board 1 has a conductive plate 2 for wiring molded therein with a resin 3. Here, the conductive plate 2 is made of, for example, a material having a spring property such as phosphor bronze. Openings 4 and 5 are provided in the front and rear portions of the electric wiring board 2. Here, the opening 4 side is the front, and the opening 5
The side will be the back. Protrusions (resin mold parts) 6 and 7 are provided before and after the opening 4, and protrusions (resin mold parts) 8 and 9 are also provided before and after the opening 5. From the conductive plate 2, fixed contact plates (folded portions) 10, 11, 1
2 and movable contact plates (folded portions) 13, 14 and 15 extend out. Fixed contact plate (fixed terminal plate) 10, 1
1, 12 and movable contact plates (movable terminal plates) 13, 14,
15 is bent up such that it rises up with respect to the conductive plate 2 and the width direction is inclined at a right angle. Fixed contact plate 1
0, 11, 12 and the movable contact plates 13, 14, 15 are
In both cases, the upper end is tilted outside the lower end. The fixed contact plates 10 and 11 project from both sides of the protrusion 6 toward the rear end of the opening 4, and
Protrusions (fixed mold parts) 16 and 17 provided on both sides of the
The tip is fixed to. Contacts 10a and 11a such as silver contacts are provided in the middle of the two fixed contact plates 10 and 11. The movable contact plates 13 and 14 are arranged side by side in the protruding portion 7
It projects further toward the front end of the opening 4, and the tip is located inside the fixed contact plates 10 and 11. Fixed contact plate 1 on the outer surface of the tip of both movable contact plates 13 and 14
Contact points 13a and 14a are provided at positions corresponding to the contact points 10a and 11a of 0 and 11. In addition, projections 13b and 14b protruding inward are provided at the intermediate portions of the movable contact plates 13 and 14 by bending.
The fixed contact plate 12 projects from the projection 8 toward the rear end, and has a tip end fixed to a projection (fixed mold portion) 18 provided on one side of the opening 5. A contact 12a is provided on the inner surface of the intermediate portion of the fixed contact plate 12. The movable contact plate 15 projects from the protrusion 9 toward the front end of the opening 5, and the tip end is located inside the fixed contact plate 12. A contact 15a is provided on the outer surface of the tip of the movable contact plate 15 at a position corresponding to the contact 12a of the fixed contact plate 12. Further, protrusions 15b and 15c are provided by bending at the intermediate portion of the movable contact plate 15,
The front protrusion 15b projects in a direction opposite to the fixed contact plate 12, and the rear protrusion 15c projects toward the fixed contact plate 12. Since the fixed contact plates 10, 11, 12 and the movable contact plates 13, 14, 15 have their bases embedded in the protrusions 6 to 9 and molded with resin, they have high holding strength. Fixed terminal board 10, 11, 12
Since the tip portion is also embedded in the protrusions 16, 17 and 18 and is molded with resin, the holding strength is further increased.

In this embodiment of the electric wiring board, the fixed contact plates 10, 11,
Since 12 and the movable contact plates 13, 14, 15 are bent at a right angle with respect to the conductive plate 2, there is almost no possibility that the portions protruding from the resin 3 are covered with the resin at the time of manufacturing. This will be described below.

In the embodiment of the electric wiring board, a conductive plate material is punched out,
After making a punched body that integrates the conductive plate part, fixed contact plate part, and movable contact plate part, bend the fixed contact plate part and movable contact plate part of the punched part (sheet metal bending), and then press the upper mold clamp. And it can be made by resin molding using the lower presser foot. Resin molding is performed as follows. The fixed contact plate 10 portion of the electric wiring board 1 will be described. The same applies to the other fixed contact plates 11, 12 and the movable contact plates 13, 14, 15. 9th
As shown in the figure, the upper mold pressing member 19 and the lower mold pressing member 20 are provided with inclined surfaces 19a and 20a, respectively, and as shown by the one-dot chain line,
0a to the fixed contact plate 10 so that the upper die retainer 19
Then, the conductive plate 2 is sandwiched between the lower die retainer 20 and the resin 3 is injected between the upper die retainer 19 and the lower die retainer 20 for resin molding, and the conductive plate 2 is resin-molded. The fixed contact plate 10 is provided with the inclined surfaces 19a, 20a of the upper mold retainer 19 and the lower mold retainer 20.
When the fixed contact plate 10 has a slight variation in thickness, the inclined surface 1 can be adjusted by moving the upper presser foot 19 and the lower presser foot 20 closer together or apart from each other.
It is possible that the fixed contact plates 10 are exactly contacted with 9a and 20a. Therefore, it is possible to eliminate a possibility that a gap is formed between the fixed mold plate 19 and the upper mold clamp 19 and the fixed mold plate 20, and the protruding portion of the fixed mold plate 10 is covered with the resin.

On the other hand, as shown in FIG. 7, when the fixed contact plate 10 'is bent at a right angle to the conductive plate 2', a vertical surface is formed on the upper mold clamp 19 'and the lower mold clamp 20'. 1
9'a and 20'a are provided, and the vertical surfaces 19'a and 20'a are brought into contact with the fixed contact plate 10 '.
When 0'is thin, fixed contact plate 10 'and vertical surface 1
A gap 21 is formed between 9'a and 20'a. Therefore, during resin molding, the resin 22 flows out from the gap 21 toward the protruding portion of the fixed contact plate 10 'as shown in FIG. In FIGS. 7 and 8, 2'is a conductive plate,
3'is a resin.

In the above embodiment, switches 23 and 24 are provided at the positions of the openings 4 and 5, as shown in FIG. The switch 23 includes fixed contact plates 10, 11,
The movable contact plates 13 and 14, a housing 25, and an operation section (operation button) 26 are included. The switch 24 is composed of a fixed contact plate 12, a movable contact plate 15, a housing 27, and an operation section (operation button) 28. . Housing 25
Is provided with one ridge 25a on each side of the base (not visible in the figure), and a groove 25b is provided in the middle of both ridges 25a.
Is provided. The housing 25 is inserted into the opening 4 from the back side of the electric wiring board 1 such that both the protrusions 25 a project to the front side. The operation unit 26 has a protrusion 30 provided on the upper surface of a base plate 29, and hooks 31 provided on both sides. As shown in FIG. 3, a ridge (slide cam) 3 along the length direction is formed in the central portion of the lower surface of the base plate 29.
Two are provided. The protrusion 32 is provided with protrusions 32a and 32b protruding laterally on both sides of the rear portion, and the protrusion 32b facing the movable contact plate 14 is the protrusion facing the movable contact plate 13. The front end projects forward from 32a. In the operating portion 23, the tips of the hooks 31 on both sides are inserted into the grooves 25b of the housing 25, and the housing 2
It is installed in 5 so that it can slide back and forth. The housing 27, like the housing 25, has ridges 27 on both sides of the base.
a is provided one by one, and the groove 2 is provided in the middle portion of both the protrusions 27a.
7b is provided. The housing 27 is also inserted into the opening 5 from the back side of the electric wiring board 1 so that both the protrusions 27 project to the front side. Operation part (operation button) 2
8, the protrusion 33a is provided on the upper surface of the base 33, and the hooks 34 are provided on both sides. As shown in FIGS. 5 and 6, ridges (cams) 35 and 36 are provided on both sides of the lower surface of the base 33. Fixed contact plate 12
The protrusion (opening cam) 35 on the side is provided with a protrusion 35a at the rear part, and the protrusion (closing cam) 36 on the side of the movable contact plate 15 is provided with a protrusion 36a at the front. . Slopes 35b and 36b are provided at the front end of the protrusion 35a and the rear end of the protrusion 36a, respectively. The operating portion 28 is a hook 3 on both sides.
The tip of No. 4 is inserted into the groove 27b of the housing 27, and is installed in the housing 27 so as to be slidable back and forth.

As shown in FIG. 3, the switch 23 has a fixed contact plate 1 when the operating portion 32 (protrusions 26) is retracted.
0 contact point 10a and movable contact plate 13 contact point 13a, fixed contact point plate 11 contact point 11a and movable contact point plate 1
All the combinations of the four contact points 14a are in the OFF state. When the operating portion 26 is moved forward, first, the protrusion 3
Since the second protrusion 32b pushes the protrusion 14b of the movable contact plate 14 to the outside, the contact 14a is pressed against the contact 11a, and the combination of the contacts 11a and 14a is turned on. Operation part 2
When 6 is further advanced, the protrusion 32a of the protrusion 32 pushes the protrusion 13b of the movable contact plate 13 to the outside, so that in FIG.
As indicated by the one-dot chain line, the contact 13a is the contact 10
It is pressed against a and the combination of the contacts 10a and 13a is also turned on. In this state, the operation unit 26
When the movable contact plates 13 and 14 are retracted, the movable contact plates 13 and 14 return to their original shapes due to their springiness, and both the combination of the contacts 10a and 13a and the combination of the contacts 11a and 14a are OF.
It becomes F.

As shown in FIG. 5 and FIG. 6, the switch 24 is arranged such that both of the ridges 35 and 36 sandwich the movable contact plate 15 therebetween, and as shown in FIG. When the operating portion 28 is moved forward, the projection (opening projection) 15c of the movable contact plate 15 slides along the slope 35b and the projection 3 is formed.
Since it is pushed inward by 5a, the contact 12a of the fixed contact plate 12 and the contact 15a of the movable contact plate 15 are turned off (open state). As shown in FIG. 6, the operating portion 28
When the back is retracted, the protrusion (closing protrusion) 15 of the movable contact plate 15
Since b slides along the inclined surface 36b and is pushed outward by the protrusion 36a, the contact 15a is pressed against the contact 12a and both contacts are turned on (contact state). This switch 24 operates the movable contact plate 15 to move the contacts 12
Not only forcibly turning on a and 15a, but also for forcing both contacts to be off, the contacts 12a and 15a are welded and the like, causing a welding failure of the switch. Fear becomes very small, O
The reliability of N, OFF operation is high. On the other hand, by utilizing the spring force of the movable contact plate 15, both the contacts 12a and 15a are OF when the movable contact plate 15 naturally returns.
When it is set to F, the contacts 12a and 15a are likely to be welded to each other, and a switch welding failure is likely to occur.
The reliability of F operation becomes low.

The electric wiring board according to the present invention is not limited to the one provided with the bent portion used as the fixed contact plate or the movable contact plate of the switch as described above, and may be projected to the outside of the electric wiring board. Alternatively, it may be provided with a bent portion used as a terminal plate or the like for connection with a component of an electric device. It is preferable that the bent portion be at an angle of about 85 ° with respect to the conductive plate (an angle inclined by about 5 ° from the direction orthogonal to the conductive plate), but the invention is not limited to this.

[Reference]

It should be noted that, as in the case of the electric wiring board, the one provided with the bent portion which becomes the movable contact plate of the switch has a problem that a contact failure of the switch provided on the electric wiring board may occur if it is made as follows. Less likely to happen.

As shown in FIG. 10, first, the conductive plate material is punched to form the conductive plate portion 37, the fixed contact plate portions 38a and 38b, and the movable contact plate portions 39a and 39.
The plate body 40 in which b is integrated is made by punching or the like. At this time, a connecting portion (connecting piece) 41 for connecting the movable contact plate portions 39a and 39b and the conductive plate portion 37 is provided. Then, the contacts 42 are provided on both the fixed contact plate portions 38a and 38b and the movable contact plate portions 39a and 39b. Next, as shown in FIG. 11, the protrusions 43a, 43 for driving the contact plates are provided on both the movable contact plate portions 39a, 39b.
b is provided by bending, and further, both fixed contact plate portions 38a and 38b and both movable contact plate portions 39a and 39b.
Bend and wake up. When the electric wiring board of the present invention is manufactured, it is bent at a right angle to the conductive plate 37 ', but it may be bent at a right angle. Thus, the fixed contact plates 44a and 44b and the movable contact plates 45a and 45b are formed. After the movable contact plates 45a, 45b are raised, the protrusions 43a, 43b
May be provided. Thereafter, as shown in FIG. 12, the conductive plate 37 'is molded with the resin 3 and, if necessary, in order to enhance the holding strength, the fixed contact plates 44a and 44b are provided with bases and tips and movable portions. The bases of the contact plates 45a and 45b are resin-molded. Finally, as shown in FIG. 13, the connecting portion 41 is cut off.

In this way, if the movable contact plate portion and the conductive plate portion are connected by the connecting portion, the movable contact plate portion is bent and resin-molded, and then the connecting portion is removed, the movable contact plate portion is bent. Since the dimensional accuracy is improved and the positioning accuracy of the movable contact plate is improved, when the switch is provided on the electric wiring board, there is less possibility of causing a contact failure or the like of the switch.

In the above example, the two movable contact plate portions are connected to the conductive plate portion by one connecting portion, but both movable contact plate portions may be connected to the conductive plate portion by separate connecting portions. Alternatively, the movable contact plate portions may be connected to each other. Even when one or three or more movable contact plates are provided on the electric wiring board, by providing the connecting portions in this manner, there is less risk of problems such as contact failure of the switch. Even when a bent portion used for other purposes such as a support plate is provided instead of the bent portion used as the movable contact plate, the connecting portion is provided as described above,
If the connecting portion is removed after performing the bending process and the resin molding, the effect of improving the bending dimension and the positioning accuracy can be obtained.

〔The invention's effect〕

In the electric wiring board according to the present invention, a conductive plate for electric wiring is molded with resin, and includes a bent portion that extends from the conductive plate and is bent so as to rise up with respect to the conductive plate, and at least a part of the bent portion. Is an electric wiring board that protrudes from the resin, but since the bent part is bent so that it is inclined at a right angle to the conductive plate, there is almost no risk that the protruding part of the bent part will be covered with resin .

[Brief description of drawings]

FIG. 1 is a perspective view of one embodiment of an electric wiring board according to the present invention, FIG. 2 is a perspective view of the same embodiment with a switch, and FIGS. 7 is an explanatory view of the structure and operation of a switch provided in FIG. 7, FIG. 7 is an explanatory view of a resin molding process of an electric wiring board having a contact plate bent at right angles to a conductor plate, and FIG.
FIG. 9 is a sectional view taken along line A, FIG. 9 is an explanatory view of a resin molding process of an embodiment of an electric wiring board according to the present invention, and FIGS. 10 to 13 are manufacturing explanatory drawings of the electric wiring board. . 1 ... Electric wiring board, 2 ... Conductive plate, 3 ... Resin, 1
0,11,12 ... Fixed contact plate (folded part), 13,
14, 15 ... Movable contact plate (folded part)

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Tatsuzo Kida 1048, Kadoma, Kadoma, Osaka Prefecture Matsushita Electric Works, Ltd. (72) Inventor Takeshi Masuda, 1048, Kadoma, Kadoma, Osaka Prefecture (72) In Matsushita Electric Works, Ltd. (72) Inventor Takeda Construction, 1048 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Works, Ltd.

Claims (2)

[Claims] 1. A conductive plate for electrical wiring is molded with a resin, and has a downward bent portion which extends from the conductive plate and is bent so as to rise up with respect to the conductive plate, and at least a part of the bent portion is made of resin. An electric wiring board, which is a projecting electric wiring board, wherein the bent portion is bent so as to be inclined with respect to the conductive plate at a right angle. 2. The electric wiring board according to claim 1, wherein the bent portion is bent at an angle of about 85 ° with respect to the conductive plate.