TW201314724A - Switch - Google Patents

Abstract

This invention provides a switch such as slide switch which is capable of conducting a steady switching operation and is highly durable even upon being reduced in size and thickness. The switch includes a movable contact member 14 having movable contact points in contact with stationary contact points, and an operating body received in a housing so as to be slidable in a stationary contact points connecting direction. The movable contact member 14 includes a base portion 30 supported by the operating body, and a pair of resilient contact tabs 31a, 31b which extend from the two edges in the stationary contact points connecting direction of the base portion 30 towards opposite ways in the stationary contact points connecting direction and which are arranged on the two edges of the base portion offsetting relative to each other. The resilient contact tabs 31a, 31b include resilient supporting tabs 34a, 34b that extend from the edges of the base portion 30 in one way of the stationary contact points connecting direction, and contact point supporting tabs 36a, 36b that loop back from the tips of the resilient supporting tabs towards the other way of the stationary contact points connecting direction. Movable contact points 13a, 13b are formed at the free ends of the contact point supporting tabs 36a, 36b.

Description

switch

The present invention relates to a switch for a sliding contact method such as a slide switch such as a portable audio, a digital camera, or a mobile terminal device.

Conventionally, for such a switch, for example, a slide switch as shown in Fig. 7 has been known (for example, refer to Patent Document 1).

The slide switch 1 includes: a casing 2 made of an insulating resin; a plurality of fixed contacts 3a, 3b, 3c, and 3d exposed at intervals on the inner surface of the casing 2; and a movable contact terminal 4 having a fixed contact a pair of movable contacts 4a, 4a that are in contact; and a slider 5 are housed in the outer casing 2 so as to be movable in a direction between the fixed contacts; and the movable contact terminal 4 is linked to the movement of the slider 5, and Move in the direction between the fixed contacts. Further, the symbol 2a in the figure is a long hole-shaped sliding hole for inserting the operation knob 5a of the slider 5.

The movable contact terminal 4 is integrally provided with elastic contact pieces 4c, 4c which are formed to be fixed from both ends of the base portion 4b supported by the slider 5 in the direction between the fixed contacts, respectively. The contact side is tilted. Further, movable contacts 4a, 4a are formed at the front ends of the elastic contact pieces 4c, 4c. By moving the slider 5, the movable contact terminal 4 supported by the slider 5 is moved in the direction between the fixed contacts, and the movable contacts 4a, 4a are slid from the fixed contacts 3a, 3c, respectively. Moving to the adjacent other fixed contacts 3b, 3d, thereby switching the circuit connected to the slide switch 1.

[Patent Document 1] Japanese Patent Laid-Open No. Hei 06-215659

However, in the prior art as described above, since the two elastic contact pieces are formed in a shape opposite to each other from the base portion, the shape of the switch in the direction between the fixed contacts is required to be miniaturized, and the elastic contact piece has to be made. The length is shortened, and if the elastically deformable portion is correspondingly shortened, the abutting pressure of the movable contact to the fixed contact is increased, and the load on the elastic contact piece becomes large, which is a problem. Therefore, it is easy to fatigue, and there is a flaw that leads to a shortened life.

Further, when the elastically deformable portion of the movable contact terminal is short, an appropriate contact pressure cannot be obtained, and the contact pressure of each fixed contact that has moved is different, and there is a flaw in the stability of the cut connection.

The present invention has been made in view of such a conventional problem, and an object of the invention is to provide a switch such as a slide switch that can perform a stable switching operation even when the size is reduced and the thickness is reduced, and the durability is good.

In order to solve the conventional problems as described above and achieve the intended purpose, the invention of the switch of claim 1 is characterized in that it is fabricated as follows. The switch is provided with: a plurality of fixed contacts exposed at intervals on the inner side of the outer casing; the movable contact terminal having a pair of movable contacts separated from the fixed contact; and an operating body The housing is accommodated in the direction of movement between the fixed contacts, and the movable contact terminal is moved in the direction between the fixed contacts by interlocking the movement of the operating member to perform a switching operation. The movable contact terminal is provided with a base portion supported by the operation body, and is disposed at a fixed position of the base portion at both end portions in the direction between the fixed contacts, and is disposed at a position closer to the different sides. A pair of elastic contact pieces facing in opposite directions in the inter-direction. Further, the elastic contact piece is provided with an elastic supporting piece portion formed in a direction from the end portion of the base portion toward the direction between the fixed contacts And the contact supporting piece portion is formed in a shape that is folded from the front end side of the elastic supporting piece portion toward the fixed contact side and in the other direction toward the direction between the fixed contacts; and the contact supporting piece The movable contact is formed at the front end portion of the portion, and the two movable contacts are arranged to be shifted from each other in the direction between the fixed contacts.

According to the switch of the present invention, as described above, the plurality of fixed contacts are provided, and the inner surface of the outer casing is exposed at intervals; the movable contact terminal has a pair of movable contacts that are in contact with the fixed contact. And the operating body is housed in the outer casing so as to be movable in a direction between the fixed contacts; and the movable contact terminal is interlocked with the movement of the operating body, and between the fixed contacts Move in the direction to switch. The movable contact terminal is provided with a base portion supported by the operation body, and is disposed at a fixed position of the base portion at both end portions in the direction between the fixed contacts, and is disposed at a position closer to the different sides. A pair of elastic contact pieces facing in opposite directions in the inter-direction. Further, the elastic contact piece includes: an elastic supporting piece portion formed in a shape from one end portion of the base portion toward a direction between the fixed contacts; and a contact supporting piece portion formed from the front end side of the elastic supporting piece portion a shape in which the fixed contact side is folded and oriented in the other direction of the fixed contact; and the movable contact is formed at an end of the contact supporting piece, and the two movable contacts are at the fixed contact The directions are staggered in the direction of the gap. Thereby, a long elastically deformable portion can be secured, and the overall size of the switch can be reduced.

<Best Mode of Carrying Out the Invention>

Next, an embodiment of the switch according to the present invention will be described based on the embodiments shown in Figs. 1 to 6 . Further, reference numeral 10 in the figure is a slide contact type slide switch.

The slide switch 10 includes a plurality of fixed contacts 12a, 12b, and 12c that are exposed at intervals on the inner surface of the casing 11, and the movable contact terminals 14 have respective The fixed contacts 12a, 12b (12b, 12c) contact the separated pair of movable contacts 13a, 13b; and the slider 15 is housed in the housing 11 so as to be movable in the direction between the fixed contacts as an operating body And by moving the movable contact terminal 14 in conjunction with the movement of the slider 15, moving in the direction between the fixed contacts to perform the switching operation of the switch.

The outer casing 11 is formed into a hollow box shape by combining the following: a molded case 16 having an open bottom surface formed of an insulating resin, and an FPC (Flexible Print Circuit) for closing the bottom surface portion of the molded case 16. The circuit board 17 and the metallic cover member 18 for fixing the FPC board 17 to the molded case 16.

The molded case 16 is formed into a hollow box shape in which the bottom surface is opened by molding, and the slider 15 is housed inside in a state of being slidable in one direction.

In the molded case 16, the pair of adjustment spring members 19 that face each other are provided on both inner portions, and the two adjustment spring members 19 abut against the side portions of the slider 15, at a predetermined sliding position. Adjustment occurs when moving between, and the movement of the slider 15 is restricted at each sliding position.

The adjustment spring member 19 is formed of a leaf spring made of a thin plate-shaped metal, and has an arc-shaped sliding projection 19a that is bulged inward at the center portion.

Both ends of the adjusting spring member 19 are press-fitted into the fixing grooves 20 and 20 formed in the molded case 16, and both end portions are supported to be elastically deformed in the switch width direction.

The slider 15 is formed into a rectangular block shape by molding, and a groove-shaped housing recess 21 for accommodating the movable contact terminal 14 is formed on the bottom surface portion.

An operation knob 22 is integrally formed on a top surface of the slider 15 for a long hole-shaped sliding hole 23 formed in a sliding direction of a top surface portion of the molded casing 16 The operation knob 22 passes through the sliding hole 23 and protrudes toward the top surface of the switch. By operating the operation knob 22 along the slide hole 23, the slider 15 is moved to perform a switching operation of the switch.

Further, on the top surface portion of the slider 15, a guide ridge 24 is formed in the sliding direction, and the ridge 24 is fitted in the sliding groove 25 formed in the sliding direction of the upper inner side surface portion of the molded case 16, Used to guide the slide.

On the other hand, on both side portions of the slider 15, ridge-shaped adjustment projections 26 and 26 projecting outward are formed, and when the slider 15 is moved, the adjustment spring member 19 is elastically deformed, and the sliding contact is used. The protrusion 19a passes over the adjustment protrusion and moves from one side of the adjustment protrusion 26 to the other side, thereby obtaining a feeling of adjustment.

As shown in FIG. 5, the movable contact terminal 14 is integrally formed by punching and bending a conductive metal plate, and is provided with a flat base portion 30 and supported by the base portion 30 in a fixed manner. A pair of elastic contact pieces 31a, 31b at both end edges of the inter-point direction.

The base portion 30 is formed in a rectangular flat plate shape having a fixing hole 32 at the center portion, and the fixing projection 33 projecting downward from the groove-like bottom portion of the housing recess portion 21 is inserted into the fixing hole 32, so that the movable contact terminal 14 is The slider 15 is supported, and the movable contacts 13a, 13b slide in the direction between the fixed contacts as the slider 15 moves.

The two elastic contact pieces 31a and 31b are respectively supported in a direction in which the base portion 30 is disposed closer to the different side in the switch width direction, and are formed in a direction between the fixed contacts, that is, both end edges in the moving direction, and are fixed. The directions between the contacts face each other on the opposite side, and are arranged in parallel with each other in the switch width direction.

Each of the elastic contact pieces 31a, 31b is composed of the following parts: an elastic support piece 34a, 34b are formed in an elongated plate shape extending slightly downward from the edge portion of the base portion 30 toward the direction between the fixed contacts; and the contact supporting piece portions 36a, 36b are formed from the front end side of the elastic supporting piece portions 34a, 34b via The arc-shaped folded portions 35a and 35b are folded toward the lower side toward the fixed contacts 12a, 12b, and 12c. Moreover, arc-shaped movable contacts 13a and 13b are formed on the distal end sides of the contact supporting piece portions 36a and 36b, that is, at the opposite end portions of the folding portions 35a and 35b.

The contact supporting piece portions 36a, 36b are formed longer than the elastic supporting piece portions 34a, 34b, and the movable contact points 13a, 13b of the respective elastic contact pieces 31a, 31b are in the switch width direction and the other side of the elastic contact pieces 31a, 31b The folded portions 35 are arranged substantially in parallel.

That is, the contact supporting piece 36a and the contact supporting piece 36b are arranged so as not to interfere with each other, and the distance between the two movable contacts 13a, 13b in the direction between the fixed contacts can be sufficiently obtained, and can be moved. The contacts 13a and 13b are arranged to be shifted from each other with a gap therebetween in the direction between the fixed contacts.

Further, the distance between the two movable contacts 13a, 13b is formed by the distance between the adjacent fixed contacts 12a, 12b (12b, 12c).

In the elastic contact pieces 31a and 31b thus constituted, the elastic supporting piece portion 34, the folded portion 35, and the contact supporting piece portion 36 function as an elastically deformable spring material as a whole, and the elastic portion is formed to be vertically repeated. The configuration allows the span of the elastically deformable portion to be made longer.

As shown in FIG. 7, the fixed contacts 12a, 12b, and 12c are printed and formed on the surface of the FPC board 17 at intervals, and are assembled on the inside of the casing 11 by assembling the FPC board 17 to the molded case 16. Face.

The fixed contacts 12a, 12b, and 12c are arranged at intervals in the sliding direction, and the movable contacts 13a and 13b are moved as the slider 15 moves as shown in Figs. 3(a) and 3(b). The switching operation is performed by sliding from the fixed contacts 12a, 12b to the positions of the fixed contacts 12b, 12c. Also, the fixed contacts 12b are common contacts.

The cover member 18 is formed of a metal plate material in a rectangular flat plate shape, and is provided at both side portions with a fixing engagement piece 41 for engaging with a side surface portion formed on the molded case 16. The projections 40 are engaged with each other.

An FPC board 17 is disposed between the cover member 18 and the molded case 16, and in this state, the fixing engaging piece 41 is engaged with the engaging protrusion 40 of the molded case 16 to fix the cover member. 18, whereby the FPC board 17 is assembled in the molded case 16.

Further, in the above embodiment, the slide switch 15 which is slidably moved between the fixed contacts 12a, 12b, and 12c by the movable contacts 13a and 13b is linked to the slider 15 which slides in the linear direction, but is described as an example. It is also applicable to a switch having another sliding contact type such as a structure in which fixed contacts 12a, 12b, and 12c are arranged at intervals in the circumferential direction, so that the movable contact terminal 14 is linked to a rotary type as an operation portion. The action of the knob moves in the circumferential direction.

1‧‧‧Slide switch

2‧‧‧ Shell

2a‧‧‧Sliding hole

3a, 3b, 3c, 3d‧‧‧ fixed joints

4a‧‧‧ movable contact

4b‧‧‧ base

4c‧‧‧elastic contact piece

5‧‧‧Sliding parts

5a‧‧‧Operation knob

10‧‧‧Sliding switch

11‧‧‧Shell

12a, 12b, 12c‧‧‧ fixed joints

13a, 13b‧‧‧ movable joints

14‧‧‧ movable contact terminal

15‧‧‧Sliding parts (operating body)

16‧‧‧Molded housing

17‧‧‧FPC substrate

18‧‧‧ Cover member

19‧‧‧Adjusting spring member

19a‧‧‧Sliding protrusions

20‧‧‧Fixed grooves

21‧‧‧ Storage recess

22‧‧‧Operation knob

23‧‧‧Sliding hole

24‧‧‧Guiding ridges

25‧‧‧Sliding groove

26‧‧‧Adjusting protrusions

30‧‧‧ base

31a, 31b‧‧‧ Elastic contact piece

32‧‧‧Fixed holes

33‧‧‧Fixed protrusions

34a, 34b‧‧‧Flexible support

35a, 35b‧‧‧Folding

36a, 36b‧‧‧Contact support

40‧‧‧ engaging protrusion

41‧‧‧Fixed clips

Fig. 1 is a perspective view showing an example of a switch according to the present invention.

Figure 2 is an exploded perspective view of the switch of the same.

Fig. 3(a) is a longitudinal sectional view of the switch of the same type, and Fig. 3(b) is a longitudinal sectional view showing a state in which the switch of the same type is slid.

Fig. 4 is a bottom view showing the molded case in the state in which the slider is assembled in Fig. 1.

Fig. 5(a) is a perspective view showing the movable contact terminal of Figs. 3(a) and 3(b), and Fig. 5(b) is a perspective view of the movable contact terminal of the same view as viewed from the lower side.

Fig. 6 is a perspective view showing an example of the FPC board of Fig. 2.

Figure 7 (a) is a cross-sectional view showing an example of a conventional switch, and Figure 7 (b) is the same as above A cross-sectional view of a conventional switch performing a switching operation.

13a, 13b‧‧‧ movable joints

14‧‧‧ movable contact terminal

30‧‧‧ base

31a, 31b‧‧‧ Elastic contact piece

32‧‧‧Fixed holes

34a, 34b‧‧‧Flexible support

35a, 35b‧‧‧Folding

36a, 36b‧‧‧Contact support

Claims (1)

A switch comprising: a plurality of fixed contacts exposed at intervals on an inner side of the outer casing; and a movable contact terminal having a pair of movable contacts that are in contact with the fixed contact; and an operating body Moving in the direction between the fixed contacts is stored in the outer casing; and the movable contact terminal is moved in the direction between the fixed contacts by interlocking movement of the operating body to perform a switching operation The movable contact terminal is provided with a base portion supported by the operation body, and both end portions of the base portion in the direction between the fixed contacts are arranged to be adjacent to each other in a staggered arrangement a pair of elastic contact pieces facing in opposite directions in the direction between the fixed contacts; the elastic contact piece having: an elastic support piece forming a shape from one end of the base toward a direction between the fixed contacts; and a contact support The sheet portion is formed in a shape that is folded from the front end side of the elastic supporting piece portion toward the fixed contact side and in the other direction toward the direction between the fixed contacts; and at the front end of the contact supporting piece portion The movable contact is formed, the two movable contact spaced apart in the direction between the fixed contact and arranged to be shifted.