JP3008751B2 - Switch device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is used as a push power switch of an electronic device such as a television. When a slide member is pushed in, a leaf spring bends and drives a conductor plate to switch on / off contacts. To a fast-acting switch device.

[0002]

2. Description of the Related Art A high-speed switch device of this type is known as a push switch capable of coping with a high rush and having a reduced longitudinal dimension. For example, there is a device proposed by the present applicant as Japanese Utility Model Publication No. 4-55388.

An outline of the device according to this conventional example will be described with reference to FIGS.

The conventional fast-acting switch device shown in these figures comprises a case 1, a fixed terminal 2 provided with a fixed contact 2a at the upper end, and a fixed terminal 2 implanted in the case 1, and a first locking projection 3a.
A common terminal 3, which is implanted in the case 1 and has a second locking projection 3b, which is also referred to as a central terminal by those skilled in the art;
A movable contact 4a at one end for bringing the fixed contact 2a into and out of contact with the fixed contact 2a
Conductor plate 4 provided with an opening 4b at the center
One end is locked to the opening edge of the opening 4b on the movable contact 4a side, and the other end is the first locking projection 3 of the common terminal 3.
a supporting plate 5 which is supported by the a and supports the conductive plate 4; and has a corner 6a and a slit-shaped notch 6b having an appearance as shown in FIG. In this state, the opening edge of the opening 4b on the side opposite to the movable contact 4a and the common terminal 3
Leaf spring 6 bent between second locking projections 3b
And a cam portion 7 for pressing a corner 6a of the leaf spring 6.
a and 7b, a slide member 7 reciprocating in the left-right direction of FIG. 4 along the upper end surface of the case 1, a compression spring 8 for automatic return which constantly urges the slide member 7, and a slide member 7 Is slidably held by a frame 9.

Here, the conductor plate 4, the support plate 5, and the leaf spring 6 constitute a unitized high-speed mechanism, and both the connection of the common terminal 3 via the support plate 5 and the leaf spring 6 are performed. The conductor plate 4 movably supported by the stopping projections 3a and 3b is driven by the support plate 5 and the leaf spring 6, and
The conduction between the movable contact 4a of the conductor plate 4 and the common terminal 3 is maintained. Also, the first of the common terminals 3
The leaf spring 6 which intersects with the locking projection 3a has a notch 6b
The operation of the leaf spring 6 is not restricted by the locking projections 3a because the locking projections 3a are penetrated with a margin. When the slide member 7 is reciprocated, the cam portion 7a or 7b presses and compresses the leaf spring 6, and the leaf spring 6, which has been compressed by a predetermined amount, is self-propelled at the time of extension. The whole is self-propelled. Reference numeral 10 in FIG. 4 denotes a tamping pin that locks and unlocks the sliding member 7 by engaging both ends with the case 1 and the sliding member 7, respectively, and 11 denotes a tamping pin holder.

That is, from the initial state shown in FIG. 4, the operating portion 7c of the slide member 7 protruding outside the case 1
As shown in FIG. 6, the cam portion 7a first presses the corner portion 6a of the leaf spring 6 to bring it into the state shown in FIG. 6, and then the compressed leaf spring 6 reaches the reversal point and expands. The self-propelled mechanism moves quickly and the movable contact 4a
Is brought into contact with the fixed contact 2a to be switched to the switch-on state. Immediately thereafter, as shown in FIG.
Abuts on the cam portion 7b to stop the self-propelled operation of the rapid-moving mechanism. When the operating portion 7c of the slide member 7 moved forward in this way is further pushed in a little further, the cam portion 7b is
8, the conductor plate 4 rotates clockwise in FIG. 7 around the contact point P between the movable contact 4a and the fixed contact 2a, so that the conductor plate 4 is located behind the conductor plate 4 as shown in FIG. The end abuts on the step 3c of the common terminal 3, and the conductor plate 4 is locked. At this time, the slide member 7 is also locked by the action of the tamping pin 10.

When the operating portion 7c of the slide member 7 which has been moved forward and locked in the on state as described above is further pushed a little by using the play stroke, the slide member 7 is acted upon by the tamping pin 10. Since the locked state is released, the compression spring 8 moves in the direction opposite to the pushing direction by the elastic force. Then, the cam portion 7b presses the corner 6a of the leaf spring 6 to the left in FIG. 8 at the time of the return movement, so that the conductor plate 4 returns to the initial position shown in FIG. During the return process, the movable contact 4a is turned into the fixed contact 2a.
And is switched off.

[0008]

By the way, in the above-mentioned conventional high-speed switch device, a strong pushing operation force is applied to the operating portion 7c of the slide member 7, and the moving speed of the slide member 7 is reduced by the leaf spring. When the self-propelling speed (about 1 m / sec) of the corner 6a is larger than the corner 6a, the corner 6a cannot catch up with the cam 7b and the self-propelling operation of the high-speed mechanism is performed by the slide member 7.
7, the corner 6a cannot be brought into contact with the cam 7b as shown in FIG. 7, so that the rear end of the conductor plate 4 is connected to the step 3c of the common terminal 3. The self-propelled operation of the high-speed mechanism is stopped only at the point of contact (see FIG. 8).

Further, as shown in FIG. 9, when the full stroke of the slide member 7 is set long while employing the same contact structure as described above, the position of the cam portion 7b is too far from the corner portion 6a. Even if the slide member 7 is slowly pushed in, the self-propelled leaf spring 6 cannot be stopped by the cam portion 7b, and the rear end of the conductor plate 4 is also brought into contact with the step portion 3c of the common terminal 3 to move quickly. The self-propelled operation of the mechanism must be stopped.

However, unlike the case where the corner portion 6a is abutted against the cam portion 7b, the end of the conductive plate 4 on the side opposite to the movable contact 4a is abutted against the step portion 3c of the common terminal 3 and the self-moving mechanism of the high-speed mechanism is provided. In order to stop the running operation, the two contacts 2 in contact
A relatively large bounce that separates between the a and 4a and other conductive contact portions occurs to cause burning and the like, so that the load life is seriously adversely affected. In other words, in the conventional structure, the load life is easily shortened unless the slide member 7 is always carefully operated, and it is also difficult to increase the full stroke with the same contact structure in consideration of the load life. I was having.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art, and it is an object of the present invention not to adversely affect the load life even if the pushing operation speed is high, and to use the same contact structure for various lengths. It is an object of the present invention to provide a high-speed switch device that can cope with a variety of strokes.

[0012]

SUMMARY OF THE INVENTION An object of the present invention is to provide a fixed terminal provided with a fixed contact, and a conductor plate having an opening and having at one end a movable contact for contacting and separating from the fixed contact. And projecting through the opening of this conductor plate,
A first locking projection disposed at a position distant from the movable contact
And a second terminal having a second locking projection disposed at a position close to the movable contact, the common terminal maintaining the conduction with the movable contact by movably supporting the conductor plate with both projections, Is locked to the opening edge of the opening on the movable contact side, and the other end is locked to the first locking projection of the common terminal, so that the opening edge of the conductor plate on the movable contact side is locked. Center on the other end
A support plate swingably supported between the support plate and a second locking protrusion of the common terminal between the opening edge of the opening on the side opposite to the movable contact and the other end of the support plate. are prestressed are <br/>屈設to the movable contact of the opening through the conductor plate
Press the support plate against the first locking projection from the side opening edge.
A leaf spring for compressing the leaf spring, a cam member for pressing a part of the leaf spring, and a slide member for compressing the leaf spring via the cam part in a reciprocating operation ;
Between the opening edge on the movable contact side of the opening and the common terminal.
The support plate is locked to the first locking projection and the support plate is locked to the first locking projection.
The plate spring is supported so as to be swingable about the projection side, and
The support plate via the conductor plate to the first locking
And press it against the
Part of the leaf spring is pressed and compressed by the
When the fixed amount of compression exceeds the reversal point, the leaf spring
In a fast-acting switch device that extends and is self-propelled, a first locking projection of the common terminal is made to pass through the leaf spring so that one end surface thereof can contact the locking projection. A notch is formed, and the end surface of the locking notch abuts on the first locking protrusion immediately after the movable contact comes into contact with the fixed contact, and the position of the leaf spring is regulated. Achieved by:

[0013]

As described above, immediately after the high-speed mechanism is self-propelled and switched on, one end face of the notch abuts on the first locking projection of the common terminal passing through the locking notch of the leaf spring. With such a configuration, the self-propelled operation of the rapid-moving mechanism can be stopped by this contact, and the impact received by the rapid-moving mechanism at the time of this contact is applied to the leaf spring by the second coupling of the common terminal. An external force can be applied to press against the stop projection, thereby suppressing the occurrence of undesired bounces separating the contacts and other conductive contact portions. If the self-propelled operation of the high-speed mechanism is stopped by using the first locking projection of the common terminal instead of the cam portion of the slide member, the moving speed of the slide member becomes high. Even when the speed is faster than the self-propelled speed of the moving mechanism, or when the full stroke of the slide member is set to be long, the self-propelled operation of the speed-moving mechanism can be reliably stopped with little adverse effect on the load life. it can.

[0014]

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

FIG. 1 is a sectional view of a main part of a switch device according to one embodiment of the present invention, and FIG. 2 is a perspective view of a leaf spring used in the embodiment, and FIGS. Parts corresponding to 9 are denoted by the same reference numerals.

The fast-acting switch device shown in FIG. 1 has a case 1, a fixed terminal 2 provided on a case 1 with a fixed contact 2a provided at an upper end, a first locking projection 3a and a second locking projection 3a. A common terminal 3 implanted in the case 1 having a locking projection 3b, and a movable contact 4a at one end for contacting and separating from the fixed contact 2a are provided, and an opening 4b is opened at the center. Conductor plate 4 having one end locked to the opening edge of the opening 4b on the side of the movable contact 4a and the other end locked to the first locking projection 3a of the common terminal 3. Support plate 5 to support
2, having a corner 6a and a slit-like notch 6c for locking, which has an appearance as shown in FIG. 2, and the opening 4b is opposed to the movable contact 4a in a state of straddling the other end of the support plate 5. A leaf spring 6 bent between an opening edge of the common terminal 3 and the second locking projection 3b of the common terminal 3, and cam portions 7a and 7b for pressing a corner 6a of the leaf spring 6. A sliding member 7 reciprocating in the left-right direction of FIG. 1 along the upper end surface of the case 1;
It is mainly composed of a compression spring (not shown) for automatically returning the slide member 7 at all times and a frame 9 for holding the slide member 7 slidably. Here, the conductor plate 4
The three members, the support plate 5 and the leaf spring 6 constitute a unitized high-speed mechanism, and are movable to both locking projections 3a and 3b of the common terminal 3 via the support plate 5 and the leaf spring 6. The supported conductor plate 4 is driven by the support plate 5 and the leaf spring 6, and the conduction between the movable contact 4a of the conductor plate 4 and the common terminal 3 is maintained. When the slide member 7 is reciprocated, the cam portion 7a or 7b presses and compresses the leaf spring 6, and the leaf spring 6, which has been compressed by a predetermined amount, is self-propelled at the time of extension. The whole is self-propelled.

The first locking projection 3 of the common terminal 3
The leaf spring 6 which intersects a has the locking projection 3a penetrated into the locking notch 6c. The notch 6c has one end face 6d formed at a predetermined position near the corner 6a. Specifically, immediately after the leaf spring 6 is displaced and the movable contact 4a comes into contact with the fixed contact 2a, the end face 6d is brought into contact with the first locking projection 3a.
a. Therefore, when the leaf spring 6 which is pushed into the slide member 7 and is compressed to the reversal point in the switch-off state expands and the rapid-moving mechanism runs on its own, the leaf spring 6 is switched immediately after the switch-on state.
Is brought into contact with the first locking projection 3a to be locked, whereby the self-propelled operation of the rapid-moving mechanism is stopped.

That is, when the operation unit (not shown) of the slide member 7 protruding outward from the case 1 is pushed in,
First, the cam portion 7a presses the corner portion 6a of the leaf spring 6, and then the compressed leaf spring 6 reaches the reversal point and expands.
Is brought into contact with the fixed contact 2a to be switched to the ON state. Immediately thereafter, the end face 6d of the locking notch 6c of the leaf spring 6 is brought into contact with the first locking projection 3 of the common terminal 3, as shown in FIG.
a, the self-propelled operation of the speed-moving mechanism is stopped and the conductor plate 4 is locked, and at this time, the slide member 7 is also locked by the action of a tampin (not shown).

When the operating portion of the slide member 7 which has been moved forward and locked in the ON state as described above is further pushed in a little by using an idle stroke, the slide member 7 is pushed.
Is unlocked by the action of the tamping pin and moves in the direction opposite to the pushing direction by the elastic force of the compression spring. At the time of this return, the cam portion 7b moves the corner 6a of the leaf spring 6 in the leftward direction in the drawing. As the leaf spring 6 is displaced, the conductor plate 4 returns to the initial position in accordance with the displacement of the leaf spring 6, and in this return process, the movable contact 4a separates from the fixed contact 2a to be turned off.

As described above, in the above-described embodiment, the locking notch 6 of the leaf spring 6 is
c to the first locking projection 3a of the common terminal 3
, The self-propelled operation is stopped, and the impact received by the rapid movement mechanism at the time of this contact pushes the leaf spring 6 toward the second locking projection 3 b of the common terminal 3. It is an external force, and therefore, the danger of generating a large bounce separating the contacts 2a and 4a and other conductive contact portions is reduced. When the leaf spring 6 is brought into contact with the first locking projection 3a of the common terminal 3 during the forward movement, the self-propelled operation of the rapid movement mechanism is stopped.
When the moving speed of the slide member 7 is faster than the self-running speed of the quick-moving mechanism as well as when the moving speed of the slide member 7 is strongly pushed and the moving speed of the sliding member 7 is faster than the self-running speed of the quick-moving mechanism, the load life is less adversely affected. Therefore, the self-propelled operation of the high-speed mechanism can be reliably stopped, so that the load life can be stabilized and the life can be prolonged, and the quality can be improved.

FIG. 3 is a sectional view of a main part of a switch device according to another embodiment of the present invention, and portions corresponding to FIG. 1 are denoted by the same reference numerals.

The switch device shown in FIG. 3 is an example in which the full stroke of the slide member 7 is set to be long while employing the same contact structure as in the above embodiment, and the cam portion 7a and the cam portion of the slide member 7 are set. Although the interval of 7b is widened, the point that the end face 6d of the leaf spring 6 that moves in the forward movement is brought into contact with the first locking projection 3a of the common terminal 3 is the same as in the above-described embodiment. The self-propelled operation of the high-speed mechanism can be reliably stopped in a state where the adverse effect on the load life is small. That is, the contact structure adopted in this embodiment and the above-described embodiment has an advantage that it can cope with various long and short stroke varieties without considering the load life.

[0023]

As described above, in the fast-acting switch device according to the present invention, the leaf spring is engaged with the first locking projection of the common terminal immediately after the fast-moving mechanism is self-propelled and switched on. Since the one end face of the stop notch abuts to stop the self-propelled operation, a large bounce that separates between the contacts and other conductive contact portions during this abutment is less likely to occur, and
Unlike the conventional method, the self-propelled leaf spring is not stopped by regulating the position with the slide member, so even if the slide member is pushed in quickly, it does not adversely affect the load life and has the same contact structure. It has an excellent effect of being able to handle a variety of long and short strokes.

[Brief description of the drawings]

FIG. 1 is a sectional view of a main part of a switch device according to an embodiment of the present invention.

FIG. 2 is a perspective view of a leaf spring used in the embodiment.

FIG. 3 is a sectional view of a main part of a switch device according to another embodiment of the present invention.

FIG. 4 is a cross-sectional view of a conventional switch device when it is not operated.

FIG. 5 is a perspective view of a leaf spring used in the conventional example.

FIG. 6 is a cross-sectional view of a main part showing a state immediately before the high-speed mechanism self-runs in the conventional example.

FIG. 7 is a cross-sectional view of main parts showing a state in which the self-propelled operation of the high-speed mechanism is stopped in the conventional example.

FIG. 8 is a cross-sectional view of a principal part showing a state in which the high-speed mechanism is rotated to the maximum in the conventional example.

FIG. 9 is a cross-sectional view of a main part showing a state immediately before a fast-moving mechanism runs by itself in a switch device according to another conventional example.

[Explanation of symbols]

 Reference Signs List 2 fixed terminal 2a fixed contact 3 common terminal 3a first locking projection 3b second locking projection 4 conductor plate 4a movable contact 4b opening 5 support plate 6 leaf spring 6a corner 6c locking notch 6d end face 7 Slide member 7a, 7b Cam part

Claims (1)

(57) [Claims] 1. A fixed terminal provided with a fixed contact, a conductor plate having an opening and having a movable contact at one end for contacting and separating from the fixed contact, and a conductor penetrating through the opening of the conductor plate. And project
A first locking projection disposed at a position away from the moving contact;
And a second terminal having a second locking projection disposed at a position close to the movable contact, the common terminal maintaining the conduction with the movable contact by movably supporting the conductor plate with both projections, Is locked to the opening edge of the opening on the movable contact side, and the other end is locked to the first locking projection of the common terminal, so that the opening edge of the conductor plate on the movable contact side is locked. Other end
A support plate for swinging around the center of the support plate, an opening edge of the opening portion on the side opposite to the movable contact and a second locking projection of the common terminal in a state of straddling the other end of the support plate. and it is prestressed be屈設between, through the conductive plate
The said support plate from an opening edge of the movable contact side of the opening
A leaf spring for pressing against the first locking projection, a slide member having a cam portion for pressing a part of the leaf spring, and compressing the leaf spring via the cam portion with reciprocating operation; The supporting plate is positioned above the opening edge of the opening on the movable contact side.
The support plate is locked to the first locking projection of the common terminal.
Is supported swingably around the first locking projection side,
And the support plate is connected to the support plate via the conductor plate by the plate spring.
The first locking projection is pressed, and the plate member is moved by the cam portion by the operation of the slide member.
A part of the neck is pressed and compressed, compressed by a predetermined amount and inverted
In a fast-acting switch device in which the leaf spring is extended and self-propelled beyond the point, the first retaining projection of the common terminal is made to pass through the leaf spring, and one end face is provided with the retaining projection. A notch for locking that can be brought into contact with the projection is opened, and immediately after the movable contact comes into contact with the fixed contact, the end face of the notch for locking comes into contact with the first locking projection and the leaf spring Wherein the position is regulated.