JPH0129952Y2 - - Google Patents

Description

[Detailed description of the invention] The invention relates to a switch that opens and closes contacts by sliding a slider using a push button or the like.
In particular, without following the operating speed of the slider,
This invention relates to a switch whose contacts change quickly.

In conventional slider type switches, an actuator is directly fixed to the slider, and the actuator opens and closes leaf contacts in the casing. However, in this conventional structure, if the operating speed of the slider is slowed down by pressing a push button or the like slowly, the leaf contacts open and close slowly, making the circuit closing speed unstable. Additionally, there is a drawback that it adversely affects the lifespan of the contacts.

This invention eliminates the drawbacks of conventional leaf contact type switches, and allows the contacts to open and close quickly without following the movement of the slider, and the circuit closing speed is stable and reliability is improved. The purpose is to provide a switch that increases the price.

The switch according to the present invention includes a slider that slides back and forth, a spring that urges the slider to an initial position, and a differential slider in a casing, and the slider and the differential slider move in the direction of movement of the slider. The differential slider is connected through an extending hole and a protrusion that freely moves within the hole, so that when the slider reciprocates, the differential slider moves with a delay by the distance of free movement between the hole and the protrusion. is provided with a pair of contacts that are in elastic pressure contact with each other, and when the slider is returned to the initial position by a spring and the differential slider is returned together with this, the pair of contacts are An actuator is provided which intervenes between the pair of contacts and is held by the elastic force of the contact, and which comes out from between the pair of contacts when the slider moves in a direction opposed to the spring and the differential slider subsequently moves. It consists of

In the present invention, when the slider is returned to its initial position by the spring, the actuator is interposed and held between the pair of contacts. When the slider is pushed in the direction opposing the spring, the differential slider moves with a delay of the free movement distance between the hole and the protrusion.
At this time, the differential slider is driven together with the slider after starting, although the starting timing is delayed. Therefore, the actuator operates quickly, the actuator comes out of the contact, and the contacts are pressed together and closed in a short time. When the pressing force on the slider is removed, the slider returns to its original position due to the force of the spring, but at this time,
The differential slider operates with a delay of the free movement distance. After this delay, the differential slider returns together with the slider, and within a short time the actuator intervenes between the contacts to open the pair of contacts.

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

FIG. 1 is an exploded perspective view of a switch according to the present invention, and FIGS. 4A, 5A, 6A, and 7A are vertical sectional views showing each operation of the assembled switch.

Reference numeral 1 in the figure is a casing made of an insulating material. On the upper surface of the casing 1, there is a protrusion 1a at the rear.
However, a pair of pins 1b and a pair of protrusions 1c are integrally molded on the front part. The upper surface of the casing 1 is covered by a cover plate 2 and a cap 3. The cover plate 2 is made of an insulating plate, and has a groove 2a at its rear end and cutouts 2b at both sides of its front end. Then, the groove 2a is attached to the protrusion 1a of the casing 1, and the notch 2b is attached to the pin 1.
b, and positioning of the cover plate 2 is performed. The cap 3 is molded from resin. Fitting holes 3a are formed on both sides of the cap 3, and the cap 3 is positioned by fitting the fitting holes 3a into the protrusions 1c of the casing 1. On the other hand, grooves 1d and 1e are formed on both sides of the casing 1, and a mounting plate 4 made of sheet metal is fitted into these grooves 1d and 1e. A pair of fixing claws 4a and 4b are provided at the upper end of the mounting plate 4, respectively. The cap 3 is placed on the upper side of the cover plate 2, and is caulked and fixed by fixing claws 4a and 4b. Thereby, the casing 1, cover plate 2, cap 3, and mounting plate 4 can be assembled together.

Inside the casing 1 are contact plates 5 and 6 formed in a symmetrical shape. Support pieces 5a and 6a are provided at the upper ends of the contact plates 5 and 6, and support pieces 5 are provided at the lower ends of the contact plates 5 and 6.
b, 6b are each molded. Then, the support pieces 5a and 6a are inserted into the support slit 2c formed on the cover plate 2, and the support pieces 5b and 6b are inserted into the support slit (not shown) formed on the bottom of the casing 1. Contact plates 5 and 6 are fixed. Further, each contact plate 5, 6 is formed with a pair of upper and lower pressure contact pieces 5c and 6c. Contact plates 5, 6
The pressure contact pieces 5c, 6c are adapted to come into pressure contact with both inner surfaces of the casing 1 when the pressure contact pieces 5c, 6c are installed in the casing 1. Furthermore, leaf contacts 5d and 6d are integrally formed in the center portions of the contact plates 5 and 6. The leaf contacts 5d, 6d are elastically deformable, and the tips of the leaf contacts 5d, d are brought into pressure contact with each other. Furthermore, protrusions 5f and 6f are provided at the center portions of the leaf contacts 5d and 6d (see FIGS. 3A and 3B). Similarly,
A pair of terminals 7 and 8 are provided within the casing 1. The upper ends 7a and 8a of the terminals 7 and 8 protrude upward from a support slit 2d formed in the cover plate 2, and the lower ends 7b and 8b extend through a support slit (not shown) formed in the bottom of the casing 1. It protrudes downward from the top. The center portion 7c of the terminal 7 is connected to the pressure contact piece 5c of the contact plate 5.
and one inner surface of the casing 1, and the center portion 8c of the terminal 8 is sandwiched between the pressure contact piece 6c of the contact plate 6 and the other inner surface of the casing 1. As a result, the terminal 7 and the contact plate 5 are electrically connected to each other, and the terminal 8 and the contact plate 6 are electrically connected to each other.

A slider 9 and a differential slider 10 are slidably provided inside the casing 1. The slider 9 is made of resin, and has a collar 9a integrally molded at its front end and a mounting rod 9b at its tip. This mounting rod 9b is for mounting a push button (not shown). A rib 9c is formed at the lower end of the slider 9, and a groove 9d is formed at the front upper surface. This rib 9c is inserted into the guide groove 1f on the bottom surface of the casing 1, and in the groove 9d,
The guide rib 3b on the lower surface of the cap 3 is inserted. The slider 9 slides while being guided by the guide groove 1f and the guide rib 3b. Further, a step 9e is formed in the front part of the slider 9, and when the slider 9 is inserted into the deepest part of the casing 1, this step 9e comes into contact with the end stop surface 3c of the cap 3.

The cap 3 is equipped with a pin 11 and a spring 12 (not shown in FIG. 1). pin 11
is formed into a U-shape, and one end 11a is rotatably inserted into the support hole 3d of the cap 3. The other end 11b is inserted into a heart cam groove 9f formed on the top surface of the slider 9. Further, the pin 11 is always pressed downward in the figure by the spring 12. Slider 9
When pressed inside the casing 1, the other end 1 of the pin 11
1b traces inside the heart cam groove 9f. Further, a return spring 13 is interposed between the collar 9a of the slider 9 and the mounting plate 4.
The slider 9 is urged in the protruding direction by its elastic force.

The differential slider 10 is also molded from resin like the slider 9. As shown in FIGS. 3A and 3B, an actuator 10a having a boat-shaped cross section is integrally formed on the lower surface of the differential slider 10. Further, a rib 10b is formed at the lower end of the actuator 10a, and this rib 10b is inserted into the guide groove 1f on the bottom surface of the casing 1. The differential slider 10 is guided by this guide groove 1f so that it can slide in the same direction as the slider 9. Locking portions 10c and 10 are provided on the top surface of the differential slider 10.
d and 10e are provided protrudingly, and these 10d and 10e
e is inserted into the rectangular hole-shaped restraint parts 9h and 9i bored in the rear part of the slider 9 (second A
(see Figure 2B). Hysteresis (clearance) x is formed between the restraint parts 9h, 9i and the locking parts 10d, 10e, and between the locking part 10c and the rear end 9j of the slider 9 (see FIG. 2B). When the slider 9 slides within the casing 1, the differential slider 10 slides with a delay corresponding to the dimension of this hysteresis x.

Next, the operation of the switch with the above configuration will be explained.

FIG. 4A shows a state in which the switch button is not pressed. The slider 9 is at the initial position (the position where it protrudes longest from the casing 1) due to the elastic force of the return spring 13. At this time, slider 9
The restraint parts (square holes) 9h and 9i are the differential slider 10
The locking portions 10d and 10e of are pulled to the left in the figure (Fig. 4B). The boat-shaped actuator 10a formed on the differential slider 10 has a leaf contact 5.
It intervenes between the protrusions 5f and 6f of d and 6d,
Each leaf contact 5d and 6d is separated from each other and the switch
It is in the OFF state (Figure 4C).

When the push button attached to the mounting rod 9b is pressed, the slider 9 moves to the right in the figure against the return spring 13. In the initial stage of this movement operation, the actuator 10a moves between the protrusions 5f and 5f of the leaf contacts 5d and 6d.
The differential slider 10 does not move because it is sandwiched and restrained by 6f. That is, only the slider 9 moves to the right in the figure, and the hysteresis x shown in FIG. 2B decreases. Then, the hysteresis x becomes 0, and the locking portions 10d and 10e of the differential slider 10
The differential slider 9 begins to move with a delay from when it comes into contact with the left ends of the restraining portions 9h and 9i of the slider 9 (FIGS. 5A to 5C). Thereafter, the differential slider 10 slides together with the slider 9, and during this short distance of movement, the actuator 10a comes out of the protrusions 5f, 6f of the leaf contacts 5d, 6d.
Therefore, the tips of each leaf contact 5d, 6d are pressed against each other by their own elastic force, and the switch circuit is closed.
It becomes ON state. In this way, the differential slider 10
operates later than the slider 9, and the actuator 10a of the differential slider 10 comes out of the protrusions 5f, 6f with a slight movement, and leaves the leaf contacts 5d, 6d.
closes. Therefore, even when the slider 9 is pushed slowly, the leaf contacts 5d and 6d are quickly closed.

After the leaf contacts 5d and 6d are in the ON state,
When the slider 9 is further pushed, the slider 9 reaches its full stroke position at a position where the step 9e of the slider 9 and the stopper surface 3c at the front end of the cap 3 come into contact. This state is shown in Figures 6A, 6B, and 6C.
As shown in the figure.

When the push button is released at the full stroke position of the slider 9, the slider 9 returns to the left in the figure by the elastic force of the return spring 13. When the slider 9 returns slightly, the end 11b of the pin 11
is locked at the lock point 9g (see Fig. 1) in the heart cam groove 9f of the slider 9, and the slider 9
It is locked in that position (Figure 7A). While the slider 9 moves from the full stroke position (Fig. 6A) to the lock position (Fig. 7A), the actuator 10c of the differential slider 10 is in a position where it lightly contacts the projections 5f, 6f of the leaf contacts 5d, 6d. left behind,
Only the slider 9 moves to the left in the figure, and hysteresis x occurs again between the slider 9 and the differential slider 10. In this locked state, leaf contact 5
Of course, d and 6d are in the ON state.

Next, the action of turning the switch OFF pushes the slider 9, which is in the locked state, back to the full stroke position (FIG. 6A). At this time, the end portion 11b of the pin 11 comes off the lock point 9g within the heart cam groove 9f. When the pushing force is removed from the full stroke position, the slider 9 returns to the initial position shown in FIG. 4A by the elastic force of the return spring 13. In this process, the positional relationship between the slider 9 and the differential slider 10 first changes from the state shown in FIG. 7B to the state shown in FIG. 6B, and then after the lock is released, the positional relationship passes through the state shown in FIG. becomes the state of and,
Actuator 10a formed in differential slider 10
During the transition from FIG. 7B to FIG. 4B, the contacts 5d and 6d intervene into the protrusions 5f and 6f of the leaf contacts 5d and 6d, and the tips of the leaf contacts 5d and 6d quickly open and return to the switch OFF state.

In the illustrated embodiment, rectangular hole-shaped restraining portions 9h and 9i are formed in the slider 9, and the differential slider 10
The locking portions 10d and 10e are formed in the shape of a protrusion, but the same effect can be achieved even if the locking portion of the slider 9 is made into a protrusion and the locking portion of the differential slider 10 is made into a square hole shape. be.

As described above, according to the present invention, a slider and a differential slider are provided in a casing, and the slider and the differential slider are connected to each other by a protrusion and a hole so as to have a certain free movement distance, and are further pressed against each other. An actuator provided on a differential slider is interposed between a pair of contacts to hold them, and the contacts are switched by this differential slider, so when pushing the slider, the stroke of the slider is The differential slider starts from an intermediate position, so that the stroke for switching the contacts is short and the switching can be performed quickly. Therefore, even if the slider is pushed slowly, the contacts are switched in a short time. Therefore, even if it is a leaf contact type switch, it is possible to achieve almost the same characteristics as a switch in which the movable contact is reversed. Also,
Since the contacts can be switched quickly, there is no adverse effect on the life of the contacts, and there is an effect of improving reliability.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention.
The figure is an exploded perspective view of the switch, Figure 2A is a plan view showing the relationship between the slider and the differential slider, Figure 2B is a vertical sectional view of Figure 2A, and Figure 3A is a partial plan view showing the state in which the contacts are open. Figure 3B is a partial plan view showing the state in which the contacts are closed, Figure 4A is a longitudinal sectional view of the switch in its initial state, and Figure 4B is a plan view showing the relationship between the slider and differential slider at that time. , FIG. 4C is a plan view showing the contact point at that time, FIG. 5A is a vertical sectional view of the switch showing the state in which the slider has started moving, and FIG. 5B is a plan view showing the relationship between the slider and the differential slider at that time. , FIG. 5C is a plan view showing the contact point at that time, FIG. 6A is a longitudinal sectional view of the switch showing the full stroke state of the slider, and FIG. 6B is a plan view showing the relationship between the slider and the differential slider at that time. Fig. 6C is a plan view showing the contact points at that time, Fig. 7A is a vertical sectional view of the switch showing the locked state of the slider, Fig. 7B is a plan view showing the relationship between the slider and the differential slider at that time, and Fig. 7C is a plan view showing the contact point at that time. The figure is a plan view showing the contact points at that time. 1...Casing, 2...Cover plate, 3...Cap, 4...Fixing plate, 5d, 6d...Leaf contact, 7, 8...Terminal, 9...Slider, 9h, 9
i...Restriction part, 10...Differential slider, 10c,
10d, 10e...locking part, 10a...actuator,
9f, 11, 12...Lock mechanism, 13...Spring, x...Hysteresis.

Claims (1)

[Scope of utility model registration request] A slider that slides back and forth, a spring that urges the slider to an initial position, and a differential slider are provided in the casing, and the slider and the differential slider are connected to a hole extending in the direction of movement of the slider and a hole inside the hole. The differential slider is connected through a floating protrusion, so that when the slider reciprocates, the differential slider moves with a delay by the free movement distance between the hole and the protrusion. The differential slider is provided with a pair of contacts that intervene between the pair of contacts when the slider is returned to the initial position by a spring and the differential slider is returned together with the spring. The switch is provided with an actuator that is held by the elastic force of the contacts and that comes out from between the pair of contacts when the slider moves in a direction opposed to the spring and the differential slider moves later.