JP3435865B2 - switch - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a switch mainly used for switching a power source of electronic equipment.

[0002]

2. Description of the Related Art A conventional switch is shown in FIGS.
This will be described with reference to FIG.

In FIG. 10, reference numeral 25 designates a conductive metal having elasticity, and at least a part thereof has a slit 25.
a switching plate having c and 25d, 28 a movable contact crimped to the switching plate so as to be electrically conductive, 30 a base made of an insulator, 26 an individual terminal embedded in the base 30 and made of a conductive metal, 29 Is a fixed contact crimped to the individual terminal 26 so as to be electrically conductive, 27 is a common terminal made of a conductive metal embedded in the base 30, and 27a and 27b are switching plates 25.
Is a swinging support portion for locking the swingably, and 27c is a switching plate 25.
It is a receiving portion that supports and is provided integrally with the common terminal 27,
22c is a pin that slides on the switching plate 25, 22b is a spring that applies pressure to the switching plate 25 via the pin 22c, 22b
a is a lever that houses the pin 22c and the spring 22b; 22 is a drive unit that houses the pin 22c and the spring 22b, and a lever 22a that is a part of the drive unit that swings the switching plate 25 to perform a switching operation; It is a case that is connected to the switch plate 25 and the lever 22a.

The operation of the switch configured as described above will be described below. First, the lever 22
By driving a, the pin 22c slides on the switching plate 25, swings the switching plate 25, and performs a switching operation. At this time, the switching plate 25 has the receiving portion 27 of the common terminal 27.
The rocking portions 25a and 25b and the rocking supporting portion 27a supported by c
It swings around the point of contact as the center of rotation.

The switching plate 25 is made of a conductive metal having elasticity and has the slits 25c and 25d. Therefore, the switching plate 25 swings while being elastically locked to the swing supporting portions 27a and 27b, and switches. is there.

[0006]

However, in the above-mentioned conventional structure, the spring constant of the switching plate 25 is large, and the force generated in the switching plate 25 is large, and as shown in FIG. There is also a problem that the dynamic support portions 27a and 27b are greatly worn and there is a problem in durability, and the amount of change in pressure due to dimensional variation between the swing portions of the switching plate 25 or between the swing support portions 27a and 27b is large. It was

Further, there is also a problem that the rotation resistance of the switching plate 25 is large due to the above-mentioned influence.

Further, slits 25c and 25d for giving elasticity to the switching plate 25 are provided.
By inserting 25d, the rigidity of the switching plate 25 decreases,
There was a problem such as breakage of the switching plate 25.

Further, since the switching plate 25 needs to have a certain width and thickness, it is difficult to process it like a thin leaf spring, so that the common terminal and the swing support portion of the switching plate are formed as one part. The shape was complicated.

An object of the present invention is to solve the above-mentioned conventional problems, and an object thereof is to provide a switch which is excellent in durability, can reduce the rotational resistance of the switching plate, and can be easily assembled.

[0011]

The common terminal of the switch of the present invention to achieve Means for Solving the Problems] This object is a predetermined length protrudes in the horizontal direction of the individual terminal side, was a substantially distal the free end relative A pair of facing arm portions are provided , a receiving portion for supporting the switching plate is provided on at least one of the substantially tip ends of the arm portion facing each other, and the switching plate is swingable at both of the substantially tip ends of the arm portion facing each other. It has a structure in which a rocking support portion elastically contacting with is provided.

[0012]

With this structure, the switching plate can be freely swung since it is always elastically engaged with the swing center. Moreover, by adjusting the length of the arm part, it is possible to set the spring constant of the part that makes elastic contact with the switching plate to be lower than that of the conventional one, and the pressure change due to wear of the swing support part and dimensional variation in processing. The durability of the switching plate can be improved, and the switching plate can be vibrated due to a shock wave generated when the contact pressure is applied, because the switching plate is always supported and the electrical connection is maintained regardless of the swinging or vibration of the switching plate. Even if there is, the common terminal absorbs this shock wave, so contact failure does not occur. Further, by providing the common terminal with the arm portion, it is not necessary to process the common terminal into a substantially S shape as in the conventional case, and the shape of the common terminal is simple and the processing is easy.

[0013]

【Example】

(Embodiment 1) An embodiment of the switch of the present invention is shown in FIG.
~ It demonstrates using FIG.

In the figure, 10 is a base made of an insulator, 6 is an individual terminal embedded in the base 10 and made of a conductive metal, 9 is a fixed contact crimped to the individual terminal 6 so as to be electrically conductive, Reference numeral 11b is a terminal crimped so as to be electrically conductive with the individual terminal 6 and not to cause unstable bonding due to contraction of resin, 7 is a common terminal made of a conductive metal having elasticity and embedded in the base 10. Reference numeral 11a is a terminal crimped so as to be electrically conductive with the common terminal 7 and not to cause unstable bonding due to resin contraction, 5 is a switching plate made of a conductive metal, and 8 is electrically conductive with the switching plate 5. The movable contacts 7a and 7d, which are swaged and are brought into contact with and separated from the fixed contacts 9 by the switching plate 5, are bent above the switch from the side surface of the common terminal 7 and have a certain length in the horizontal direction on the individual terminal 6 side. Then The arm portions 7c and 7f, which are integral with the common terminal 7 and have substantially free tips, are bent inward so that the cross-section portions of the substantially opposite tips of the arm portions 7a and 7d face each other. The receiving portions 7b and 7e for supporting the plate 5 are rocking supporting parts for elastically and elastically locking the switching plate 5 so that the switching plate 5 can be easily inserted. , 7e are provided with an inclination so that the upper part is wider than the substantially central part, and after the switching plate 5 is mounted, the swinging support parts 7b, 7e are swingably supported so that the switching plate 5 does not come off. The portions 7b and 7e are inclined so that the lower portion is wider than the substantially central portion.

2c is a pin sliding on the switching plate 5,
2b is a spring that applies pressure to the switching plate 5 via the pin 2c,
Reference numeral 2a is a lever for accommodating the pin 2c and the spring 2b, and 2 is a lever 2a for accommodating the pin 2c and the spring 2b.
A drive unit 1 for swinging the switch to perform a switching operation is a case that is connected to the base body 10 and houses the switching plate 5 and the drive unit 2.

The operation of the switch configured as described above will be described with reference to FIGS. 3 (a) to 4 (b). When the drive unit 2 is moved in the direction of arrow A in the OFF state of FIG. 3A, the switching plate 5 swings to the ON state of FIG. 3B, and the movable contact 8 and the fixed contact 9 are moved to each other. Since the springs 2b contact each other and apply a force to the switching plate 5 via the pin 2c to secure the contact pressure, the terminals 11a and 11b are electrically connected (ON). Further, when the drive unit 2 is moved from the state of FIG. 3 (b) to the state of FIG. 3 (a),
Since the switching plate 5 swings and the movable contact 8 is separated from the fixed contact 9, the terminals 11a and 11b are in an electrically non-conductive state (OFF).

At this time, the switching plate 5 is supported by the receiving portions 7c and 7f as shown in FIG. 4 (b), and its side surface orthogonal to the swing center axis is elastically locked by the swing supporting portions 7b and 7e. ing. Since the swing support portions 7b and 7e are provided at the free ends of the arms 7a and 7d, the spring constant can be made lower than that of the conventional one.

The individual terminals 6 and 11b are connected to each other and the common terminal 7 and the terminal 11a are connected to each other as shown in FIG.
Terminal tip portions 7g, 7 of the common terminal 7 for d, 11e, 11f
h or the terminal tip portions 6a and 6b of the individual terminals 6 are guided in and the metals are caulked to each other, so that the coupling failure due to the resin contraction of the substrate 10 can be prevented.

As described above, according to this embodiment, the arm portion 7a having the free end portion substantially at the tip from the part of the common terminal 7,
7d is provided, and the receiving portions 7c and 7f of the switching plate 5 and the swing supporting portions 7b and 7e are provided at substantially the tips of the arm portions 7a and 7d, whereby the spring constants of the swing supporting portions 7b and 7e that elastically contact the switching plate 5 are provided. Can be made lower than that of the conventional one, and the change in pressure due to wear of the swing support portions 7b and 7e and the portion of the switching plate 5 that is locked by the swing support portions 7b and 7e and dimensional variation in processing is small. It is possible to provide a switch that has improved durability, can reduce the rotational resistance of the switching plate, and can be easily processed and easily assembled.

(Second Embodiment) A second embodiment of the present invention will be described below with reference to FIGS. 6 (a) and 6 (b).

Since the second embodiment has basically the same configuration as that of the embodiment shown in FIG. 1, the same components are designated by the same reference numerals and detailed description thereof will be omitted. To do. In the figure, the point different from the embodiment of FIG. 1 is the shape of the individual terminals 6 and the common terminals 7. According to this embodiment, the individual terminals 6 and the common terminals 7 each extend to the portion protruding outward from the base body 10. The point is that it is composed of one part.

In the switch constructed as described above, the individual terminal 6 and the common terminal 7 are each made up of a single part including the projecting portions 6c and 7i projecting outwardly from the base body 10. The number of parts can be reduced compared to one,
Further cost reduction can be achieved.

(Embodiment 3) A third embodiment of the present invention will be described below with reference to FIGS. 7 to 8C. The third embodiment basically has the same configuration as that of the embodiment of FIG. 1, and therefore detailed description thereof will be omitted, and only different points from the embodiment of FIG. 1 will be described. According to the figure, the switching plate 5 has a swinging portion 5a,
8A and 8B are provided with convex stoppers 5c and 5d on the rear side of 5b, and a substantially U-shaped portion 5e is provided on the rear side.
When in the state (c) (OFF), the stoppers 5c of the switching plate 5 are provided on the upper portions of the arm portions 7a and 7d of the common terminal 7.
The point is that 5d abuts.

With respect to the switch configured as described above, description of the basic operation is omitted, and only the description of the switching plate 5 and the common terminal 7 will be given.

First, the substantially U-shaped portion 5e provided on the switching plate 5
As shown in FIG. 8B, when the fixed contact 9 and the movable contact 8 are welded to each other, the convex portion 2d formed on the lever 2a is substantially U-shaped.
This is for peeling the welding by hitting the character portion 5e. Further, by bringing the stoppers 5c and 5d of the switching plate 5 into contact with the upper portions of the arm portions 7a and 7d of the common terminal 7, even if the bending of the substantially U-shaped portion 5e occurs, the switch can be operated as shown in FIG. The contact distance between the fixed contact 9 and the movable contact 8 in the state of () is easily maintained constant.

As a result, it is possible to provide an excellent switch in which it is easy to secure a constant distance between contacts.

Although the lever 2a of the switch is a slide type in each of the above embodiments, it may be a seesaw type or a push type. Further, in the first to third embodiments, the common terminal 7 used is that shown in FIGS. 1 and 6, but as shown in FIG. 9, one of the free ends of the arm portions 7a and 7d is used.
Only one receiving part 7f is bent and the vicinity of the bases of the arms 7a, 7d are integrated, and the arms 7a, 7d are divided into a plurality of parts in the middle and have a length in the horizontal direction. It may be one in which the vicinity of the tip is bent upward.

[0028]

As described above, according to the present invention, the common terminal is
There is provided a pair of opposed arm portions that are formed to project in the horizontal direction on the individual terminal side by a predetermined length and have substantially free ends .
It is, provided with a receiving portion supporting at least one to switching plate facing the substantially leading end of the arm portion, provided oscillating supporting portion swingably bullet contacting the switching plate to both opposing the substantially leading end of the arm portion As a result, the spring constant of the receiving portion and the swing support portion is reduced due to the influence of the arm portion, the switching plate is supported by the receiving portion, and the swing support of the switching plate is supported by the swing support portion. By swinging the side surface orthogonal to the part so that it can swing freely, there is little pressure change due to wear of the swing support part and the swing part of the switching plate or dimensional variation during processing, and durability can be improved. It is possible to realize an excellent switch that can reduce turning resistance, can be easily processed, and can satisfy a switch that can be easily incorporated.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing an embodiment of a switch of the present invention.

FIG. 2 is an overall perspective view of the same.

FIG. 3A is an overall sectional view showing the same off state. (B) Overall sectional view showing the ON state

FIG. 4A is a side view of a common terminal which is the same main part, and FIG. 4B is a side sectional view showing a fitting state of the common terminal which is the main part and a switching plate.

FIG. 5A is a perspective view of a terminal crimped to an individual terminal, which is the same main portion, and FIG. 5B is a perspective view of a terminal crimped to a common terminal, which is the main portion.

FIG. 6A is a perspective view of a common terminal according to another embodiment. (B) A perspective view of an individual terminal of the other embodiment.

FIG. 7 is a perspective view of a switching plate according to another embodiment.

FIG. 8A is a sectional view of the other embodiment in an ON state. (B) A sectional view of the contact welding peeling state of the other embodiment (C) Sectional drawing which shows the off state of the other Example.

FIG. 9A is a perspective view of another embodiment of the common terminal which is the same main part. FIG. 9B is a perspective view of another example of the common terminal which is the same main part.

FIG. 10 is an exploded perspective view of a conventional switch.

FIG. 11 is a perspective view of a common terminal, which is the main part of the same.

FIG. 12 (a) is an exploded perspective view showing a fitting state of a common terminal and a switching plate, which are the same main parts, and FIG. 12 (b) is a sectional view showing a fitting state of a common terminal and a switching plate, which are the same main parts.

[Explanation of symbols]

1 case 2 drive 2a lever 2b spring 2c pin 2d lever protrusion 5 Switching plate 5a, 5b swinging part 5c, 5d stopper 5e U-shaped section 6 individual terminals 6a, 6b Terminal tip 6c protrusion 7 common terminal 7a, 7d arm part 7b, 7e Swing support part 7c, 7f receiving part 7g, 7h Terminal tip 7i protrusion 8 movable contacts 9 fixed contacts 10 Base 11a, 11b terminals 11c, 11d, 11e, 11f grooves 21 cases 22 Drive 22a lever 22b spring 22c pin 25 Switching plate 25a, 25b swinging part 25c, 25d slit 26 individual terminals 27 common terminals 27a, 27b Swing support part 27c Receiver 28 movable contacts 29 fixed contacts 30 base

─────────────────────────────────────────────────── ─── Continuation of the front page (56) Reference JP-A-4-32118 (JP, A) Actually open 1-168927 (JP, U) Actually open 52-86675 (JP, U) JPB Sho 56- 17773 (JP, B1) Actual public 53-29959 (JP, Y1) Actual public 63-21075 (JP, Y1) Actual public 58-7950 (JP, Y1) (58) Fields investigated (Int.Cl. ⁷ , DB name) H01H 15/00-15/24

Claims (2)

(57) [Claims] 1. A base body made of an insulator, individual terminals made of a conductive metal having at least one fixed contact and embedded in the base body, and a common terminal made of a conductive metal embedded in the base body. A switching plate made of a conductive metal that has a movable contact that opens and closes between the fixed contact and is swingably supported by the common terminal; and a drive unit that swings the switching plate to perform a switching operation. , A case which is coupled to the base body and accommodates the drive section and the switching plate. The common terminal is formed to project by a predetermined length in the horizontal direction on the individual terminal side, and the substantially tip is a free end. A pair of arm portions facing each other is provided, a receiving portion for supporting the switching plate is provided on at least one of the substantially tip ends of the arm portions facing each other, and the switching portion is provided at both of the substantially tip ends of the arm portion facing each other. Make elastic contact with the plate A switch equipped with a swing support. 2. The receiving portion of the common terminal and the swing support portion are made to face each other.
2. The switch according to claim 1, wherein the pair of facing arm portions are bent so that respective cross-sectional portions of substantially tip ends thereof face each other, and are provided at the bent tip portions of the arm portions.