JPH079320Y2 - Push switch - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of use) The present invention relates to a push switch used when, for example, a video deck detects the insertion of a video cassette.

(Prior Art) In a conventional push switch of this type, an operator is reciprocally incorporated in a housing, and the operator is biased in a return direction by a return spring in the housing.
A movable contactor is supported by the operator, and a fixed contactor is provided in the housing at a position where the contact portion of the movable contactor comes into contact with the housing by the urging force of the return spring.

(Problems to be solved by the invention) However, in such a push switch, since the operator has no play, the switch is turned off just by touching the video cassette, which causes rattling in the insertion process of the video cassette. There is a problem that the operation causes chattering in which the contact portion of the movable contact comes in and out of contact with the fixed contact. In addition, there is a problem that chattering occurs even when the contactor vibrates due to vibration.

An object of the present invention is to provide a push switch that can reliably prevent chattering.

(Means for Solving the Problems) In order to achieve the above-mentioned object, the present invention has an operating element incorporated in a housing such that the operating element can reciprocate, and the operating element is biased in a return direction by a return spring in the housing. In the push switch, the movable contactor is supported by the operation element, and the housing is provided with a fixed contactor at a position where the contact portion of the movable contactor is contacted by the urging force of the return spring. The movable contactor is cantilevered by the operator in a direction intersecting the reciprocating direction of the operator, and the contact portion is formed by a leaf spring that is free from the operator. It is characterized in that a movable contactor operating portion is provided which faces the movable contactor via a gap in a standby state where the contact portion of the contactor is in contact with the fixed contactor.

(Operation) In the push switch according to the present invention, there is a gap between the movable contactor operating portion of the operator and the movable contactor, and the movable contactor is cantilevered and its contact portion is biased by the return spring. Since it is in contact with the fixed contact and is in a bent state, the movable part that was bent until the operator was pushed and moved in the forward direction until the gap disappeared and the flexible contact was pressed. By gradually raising the bending posture of the contactor, the contact portion of the movable contactor is maintained in contact with the fixed contactor. Therefore, even if the operator is slightly pushed, the contact portion of the movable contact does not separate from the fixed contact, and chattering does not occur. When the movable contact operation portion of the operator contacts the movable contact and the movable contact is pushed in the forward direction, the contact portion of the movable contact separates from the fixed contact and is switched off.

(Example) Hereinafter, an example of the present invention will be described in detail with reference to the drawings.

1 is a longitudinal sectional view showing a push switch according to an embodiment of the present invention, FIG. 2 is a plan view, FIG. 3 is a plan view with a fixed contact removed, and FIG. 4 shows a part removed. It is a bottom view of the state where it did.

As shown in FIG. 1, the push switch includes a lower member 11
It has a housing 1 in which an upper member 12 and an upper member 12 are combined.
A movable contactor 3 having a fitting relationship with the operator 2, fixed contactors 4a and 4b with which the contact portions of the movable contactor come into contact with and separate from each other,
A return spring 5 that urges the operator 2 and the movable contactor 3 in the backward direction is incorporated.

The operator 2 includes a central shaft portion 2a and both arm portions 2b, 2b (see FIGS. 1 and 3) which are symmetrically extended from the shaft portion 2a and integrally formed. The shaft 2a has a pair of holding projections 2c, 2c (see FIG. 4) formed on both sides of a projecting piece 2f projecting downward in FIG. 1, and a movable projection projecting from an upper portion to an intermediate predetermined position. Contact operation parts 2d and 2e (Figs. 2 and 3
(See the figure) and. Both movement restricting pieces 2g, 2g (see FIG. 1 and FIG. 4) are integrally projectingly provided on the arm portions 2b, 2b in a symmetrical arrangement. The operator 2 uses this movement restriction piece 2g, 2
g is the fixed contacts 4a, 4a and the bottom ridges 1b, 1b of the housing 1
(See FIG. 1) and the amount of reciprocating movement is restricted.

The movable contactor 3 includes a rectangular substrate portion 3a that abuts on the forward side (lower surface side) of the arm portions 2b and 2b, and a pair of point-symmetrically extending from one diagonal portion of the substrate portion 3a. Spring pieces 3b, 3c (3rd
(See FIG. 4 and FIG. 4), and these spring piece portions 3b, 3c
Is folded back to the shaft portion 2a side and is at a position corresponding to the backward side (upper surface side) of the arm portion 2b. As shown in FIG. 4, the movable contactor 3 is provided with a rectangular hole 3f in the center of the substrate portion 3a, and the projecting piece 2f of the operator 2 is formed in such a manner that the holding ridges 2c, 2c pass through the hole 3f. Press in and insert, both spring pieces
The arm portions 2b, 2b of the operator 2 are arranged between 3b, 3c and are in a fitting relation with the operator 2, and the holding ridge 2c of the operator 2 is arranged.
Positioned and supported by.

Contact points 3d and 3e are provided at the tips of the spring piece portions 3b and 3c, respectively. Thus, the spring pieces 3b, 3c are supported by the base plate 3a in a cantilever manner, and the contact points 3d, 3e are provided at their free ends, and the springs 3b, 3c are in a standby state by the urging force of the return spring 5 (see FIG. 5). The contact portions 3d and 3e are in pressure contact with the fixed contacts 4a and 4b due to their own elasticity.

In the housing 1, a pair of fixed contacts 4a and 4b are incorporated and supported so as to be positioned on the backward side with respect to the movable contact 3 and intersect the contact portions 3d and 3e.

One end of the return spring 5 is a recess of the housing 1.
It abuts on the bottom surface of 1a and the other end abuts on the substrate portion 3a of the movable contactor 3. Due to the biasing force of the return spring 5, the contact portions 3d, 3e of the movable contactor 3 are brought into contact with the fixed contactors 4a, 4b, and the operation element 2 has the upper ends of the movement restricting pieces 2g, 2g fixed contactors. The movement in the backward direction is stopped while being in contact with the lower surfaces of 4a and 4b.

In this way, the contact points 3d and 3e of the movable contact 3 are fixed to the fixed contact 4
In the standby state in which the movable contactor is in contact with a and 4b, the lower ends of the movable contactor operating parts 2d and 2e face the spring piece parts 3b and 3c of the movable contactor 3 via the gap 6 as shown in FIG. ing.

An operating lever 7 for operating the operating element 2 by inserting a video cassette is pivotally supported on the housing 1 by a pivot portion 8. A stopper 9 is provided on the free end 7a side of the operating lever 7 to determine the limit of its return.

Next, the operation of such a push switch will be described with reference to FIGS.

FIG. 5 shows a standby state. In this state, the operating lever 7
Comes into contact with the shaft portion 2a of the operator 2 and the movable contactor operating portions 2d, 2e
And the spring pieces 3b and 3c of the movable contactor 3 have a gap 6, and the contact portions 3d and 3e of the movable contactor 3 are in contact with the fixed contacts 4a and 4b.

In FIG. 6, a video cassette (not shown) is inserted and pushed in, and the operating element 2 is pushed in the forward direction through the operating lever 7 against the pressing force of the return spring 5, the gap 6 disappears, and the movable contactor is operated. The state where the portions 2d and 2e are in contact with the spring piece portions 3b and 3c of the movable contact 3 is shown.

In this case, each spring piece 3b, 3c is supported in a cantilevered manner, and in its bent state by the urging force of the return spring 5, its contact portion 3b.
Since d and 3e are in contact with the fixed contacts 4a and 4b, even when the operator 2 is pressed, the movable contact operating parts 2d and 2e also press the spring pieces 3b and 3c. , The bent spring piece 3b,
Only the bending posture of 3c is gradually raised, and contact points 3d, 3e
Although the contact positions of the fixed contacts 4a, 4b are slightly displaced, the contact parts 3d, 3e do not separate from the fixed contacts 4a, 4b, and the switch is not turned off first.

FIG. 7 shows that the video cassette is completely inserted, the manipulator 2 is pushed in the forward direction via the manipulating lever 7, and the spring pieces 3b, 3c of the movable contact 3 are moved by the movable contact operating parts 2d, 2e. It shows a state in which the contact portions 3d and 3e are pushed in the forward direction and separated from the fixed contacts 4a and 4b to be switched off.

As is clear from these figures, in the push switch according to the present embodiment, the movable contact operation unit 2 is in the standby state.
Since there is a gap 6 between d, 2e and the spring pieces 3b, 3c of the movable contactor 3, the contact points 3d, 3e of the movable contactor 3 are fixedly contacted only if the operator 2 is slightly pushed. Chattering does not occur without separating from the children 4a and 4b. Further, since the movable contactor is supported in a cantilever manner, the contact portions of the contact portions 3d, 3e with respect to the fixed contactors 4a, 4b are displaced, so that the contact portions are subjected to the wiping action.

(Effects of the Invention) As described above, in the push switch according to the present invention, in the standby state, there is a gap between the movable contactor operating portion of the operator and the movable contactor, and the movable contactor is cantileveredly supported. Since the contact part is in contact with the fixed contact and is bent by the biasing force of the return spring, the operator is pushed and moves in the forward direction, and the gap disappears and the flexible contact operation part Until the movable contact is pressed, the flexible contact, which had been bent, is gradually bent, preventing the contact part of the movable contact from being separated from the fixed contact and being turned off. can do. Therefore, according to the present invention, the chattering can be surely prevented without being switched off by a slight pressing force or vibration applied to the operator. In addition, in the present invention, since the movable contactor is supported in a cantilever manner, when the bending posture of the movable contactor that is bent is gradually generated, the wiping action due to the displacement of the contact portion of the contact portion of the movable contactor with respect to the fixed contactor is displaced. There is an effect that the reliability of the electrical connection here can be maintained for a long period of time.

[Brief description of drawings]

1 to 4 show a push switch according to an embodiment of the present invention. FIG. 1 is a vertical sectional view, FIG. 2 is a plan view, and FIG. 3 is a state in which a fixed contact is removed. A plan view and FIG. 4 are bottom views with the bottom of the housing removed. 5 to 7 are sectional views for explaining the operation of the push switch according to the embodiment of the present invention. DESCRIPTION OF SYMBOLS 1 ... Housing, 2 ... Operator, 2a ... Shaft part, 2b ... Arm part, 2c ... Holding ridge, 2d, 2e ... Movable contact operation part, 3 ... Movable contact, 3a ... Board part, 3b, 3c ... Spring piece parts, 3d, 3e ... Contact parts, 4a, 4b ... Fixed contacts, 5 ... Return spring, 6 ... Gap, 7 ... Operation lever.

Claims (1)

[Scope of utility model registration request] 1. An operating element is reciprocally incorporated in a housing, the operating element is biased in a return direction by a return spring in the housing, and a movable contact is supported by the operating element. In a push switch in which a fixed contact is provided at a position where the contact portion of the movable contact comes into contact with the urging force of the return spring, the movable contact crosses the reciprocating operation direction of the operator. In a standby state in which the contact portion is supported by a cantilever and the contact portion is formed of a leaf spring that is free from the operator, and the contact portion of the movable contact contacts the fixed contact on the operator. The push switch is characterized in that a movable contact operation section is provided facing the movable contact via a gap.