JPH0345404Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) The present invention is designed for use in electrical equipment, especially in automobiles, in which switching between two modes and switching on/off is performed by pushing a single operating knob. This invention relates to a two-mode push switch used in equipment.

(Prior Art) Conventionally, a rotary type push switch has been used as this type of two-mode push switch.
For example, if the two modes are A mode and B mode, each push operation will switch between the two modes in the order OFF→A→B→OFF→. There is.

(Problem to be Solved by the Invention) However, in the conventional two-mode push switch, since mode A is always set when it is turned on, if mode B is always required, two push operations are required from the off state. must be done. Further, when it is necessary to switch from B mode to A mode, there is a problem that the switching to A mode cannot be done unless the mode is turned off once.

The present invention was devised in view of such problems, and an object of the present invention is to provide a two-mode push switch that allows mode switching with a single push operation.

(Means for Solving the Problems) In order to solve the above-mentioned problems, the present invention provides a two-mode push switch in which mode switching and on/off switching is possible with one operating knob. A first switch that is driven by pushing in at least the first stroke and alternately switches between two types of modes each time it is pushed in, and a first switch that is driven by pushing in at least the second stroke, which is set larger than the first stroke of the operating knob. However, a second switch is provided that turns on and off each time the switch is pressed, and when the switch is operated for more than the second stroke, both the first switch and the second switch switch, and when the second switch is turned on, the first switch is turned on. Changed to return to the mode state when it was previously turned on.

(Example) Next, an example of the present invention will be described with reference to the accompanying drawings.

FIG. 1 shows a two-mode push switch according to the present invention, roughly consisting of an operation knob 1, a first switch 2,
It consists of a second switch 3 and a case 4 that accommodates them.

The operating knob 1 has its upper end rotatably supported by a hinge 5 on the front surface of the case 4, and a stopper 6 is provided at its lower end to prevent it from coming off outward.

The first switch 2 roughly consists of a ratchet wheel 7, a first slider 8, and a feed member 9, and the ratchet wheel 7 has two first movable contacts 10 that interlock with the ratchet wheel 7. The switch is rotatably attached to the switch, and the contacts switch each time the switch rotates one pitch, making it possible to switch between predetermined modes.

Then, the ball 12 and the compressed first spring 13 are inserted into the through hole 11 provided in the case 4 between the ratchet wheel 7 and the operating knob 1, and the ball 12 is pushed toward the ratchet wheel 7 by the first spring 13. The operating knob 1 is biased outward so as to be energized and locked in the tooth groove. Therefore, the rotation of the ratchet wheel 7 is restricted below a predetermined torque, and the position of the movable contact 10 is fixed, and the operation knob 1 can be pushed in and out.

The first slider 8 is slidably provided on the inner lower surface of the case 4, and a second spring 14 is attached between one end of the slider 8 and a heart cam block 22, which will be described later, and which is also accommodated on the inner lower surface of the case 4. Operation knob 1
It is biased so that it comes into contact with the lower end of. Therefore, the first slider 8 is configured to slide by pushing the operation knob 1.

The feeding member 9 is a roughly L-shaped member consisting of a horizontal first lever 16 having a pulling claw 15 at the tip and a vertical second lever 17 having elasticity, and is provided at a bent portion thereof. It is rotatably attached to the slider 8 by a support shaft 18, and when the operation knob 1 is pushed back, the pull pawl 15 engages with the tooth groove of the ratchet wheel 7, and at the same time, the tip of the second lever 17 engages with the tooth groove of the ratchet wheel 7. It is designed to be biased into contact with the tip of tooth No. 7.

The second switch 3 roughly consists of a second slider 21 and a heart cam block 22.

One end of the second slider 21 is in contact with a pushing piece 23 provided on the end surface of the first slider 8 of the first switch 2, and the other end is provided with a third spring 24 which is compressed and biased between the second slider 21 and the case 4. It has a second movable contact 27 on its upper surface that is urged upward by a fourth spring 25 and comes into contact with a printed circuit board 26, and is slidable in the same direction as the first slider 8 and has a predetermined stroke. It is designed so that it can be switched on and off by moving it.

The heart cam block 22 has a heart-shaped groove 28 formed in a part of the bottom surface of the case 4, and has an arm 2 attached to the second slider 21 so as to be horizontally swingable.
The protrusion 30 at the tip of the arm 9 is fitted into the heart-shaped groove 28, and the arm 29 is urged downward by the fifth spring 31 so that the protrusion 30 always comes into contact with the bottom surface of the heart-shaped groove 28. . As the second slider 21 reciprocates with a predetermined stroke, the protrusion 30 moves within the heart-shaped groove 28, and the second slider 21 moves at the top dead center _c2 and bottom dead center _c1 of the heart-shaped groove 28. When the second movable contact 27 is locked, the second movable contact 27 is switched.

Incidentally, reference numeral 19 provided on the case 4 is a display section for displaying mode switching.

In the two-mode push switch constructed as described above, the operation of the first switch 2 when a small stroke push operation is performed will first be described with reference to FIGS. 1 to 4.

When the operating knob 1 is pressed, rotational torque is applied to the ratchet wheel 7 via the slider 8 and the pull pawl 15 to press the ball 12. When this rotational torque overcomes the spring reaction force of the first spring 13 that locks the ball 12 in the tooth groove of the ratchet wheel 7, the ball 12 is held by the teeth of the ratchet wheel 7.
2 will be pushed back. Therefore, when the operating knob 1 is pushed in with increasing pressure, as shown in FIG.
The slider 8 slides, the teeth of the ratchet wheel 7 are moved, and the ball 12 is pushed back. At this time, as the slider 8 moves, the biasing force of the second lever 17 weakens.
Eventually it will leave the ratchet wheel 7. Then, at the moment when the ball 12 passes over the tooth tip of the ratchet wheel 7, the component of the rotational torque that presses the ball 12 disappears, and as a result, the ball 12 fits into the adjacent tooth groove due to the biasing force of the first spring 13, and the ratchet wheel 7 rotates one pitch and the movable contact 10 switches to the new mode (FIG. 3).

Here, when the push-in operation of the operating knob 1 is stopped, the rotational torque is lost, and as shown in FIG. 16 tilts due to its own weight.

Next, when you stop pressing the operation knob 1, the first
The operation knob 1 and the slider 8 are pushed back according to the urging force of the spring 13 or the second spring 14. Here, while the slider 8 is being pushed back, the second lever 17 comes into contact with the tooth tip of the ratchet wheel 7, so the first lever 16 is lifted as the slider 8 moves, and the pull claw 15 is brought into contact with the ratchet wheel 7. engage. Furthermore, the second lever 17 is deflected to increase the biasing force against the ratchet wheel 7, so that the mode can be switched by a single push operation with the pull pawl 15 securely engaged with the teeth of the ratchet wheel 7. ends.

In addition, in the above-described small stroke push operation, the pushing piece 23 of the first slider 8 pushes the second slider 21, and the protrusion 30 of the second switch 3 moves along the heart-shaped groove 28. The second switch 3 is always on because it does not reach the top dead center c ₂ and always returns to the bottom dead center c ₁ when pushed back.

Next, the operation of the second switch 3 when a large stroke push operation is performed will be explained based on FIGS. 1, 5, and 6.

As shown in FIG. 1, when the operating knob 1 is pushed in with a large stroke from the state where the second switch 3 is on, the first switch 2 is turned on as shown in FIG.
The pushing piece 23 pushes the second slider 21, the protrusion 30 is locked at the top dead center _c2 of the heart-shaped groove 28, and the second movable contact 27 is stopped at the OFF position. During this time, the first switch 2 operates in the same manner as in the case of the small stroke operation, and enters the same state as shown in FIG. 3, and switches to the next mode.

Subsequently, when the pressing force on the operation knob 1 is reduced and the operation knob ₁ is pushed back, as shown in FIG. The moving piece 23 is detached from the second slider 21,
The second switch 3 is maintained in the off state. Even during this large stroke push-back operation, the feed member 9 of the first switch 2 operates in the same manner as in the small stroke operation, resulting in the same state as shown in FIG. 4.

Furthermore, when the pushing operation with a large stroke is performed again, the pushing piece 23 of the first slider 8 pushes the second slider 21, and the protrusion 30 is removed from the top dead center _c2 . When the push-back operation is performed, the second slider 21 is moved in the push-back direction by the third spring 24, and the protrusion 30 returns from the top dead center _c2 to the bottom dead center _c1 and is locked. Therefore, the second movable contact 27 is stopped at the ON position, and the second switch 3 is turned on.
During this second large stroke push operation,
The mode of the first switch 2 is changed in the same manner as the first large stroke push operation.

Next, to summarize the above push operations, firstly, when small stroke push operations are performed continuously, the first switch: A → B → A → B → the second switch: ON → ON → ON → ON →, and switching between A mode and B mode is possible with one small stroke operation. Also, if large stroke push operations are performed continuously, the first switch: A→B→A→B→ the second switch: ON→OFF→ON→OFF→ or the first switch: B→A→ B→A→ Second switch: ON→OFF→ON→OFF→ The same mode always appears in the ON state. Therefore, if the device is always used only in a certain mode, it is only necessary to switch it on and off, and there is no need to perform a mode switching operation.

(Effects of the invention) As is clear from the above explanation, according to the invention, modes can be switched with a single push button operation, and even if an on/off operation is performed, the previous on state mode is always maintained. Therefore, when always used in the same mode, it has the advantage of being extremely simple.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of a two-mode push switch according to the present invention, and FIGS. 2 to 4 are cross-sectional views showing its operating state by a small stroke push operation.
FIGS. 5 and 6 are cross-sectional views showing operating conditions due to a large stroke push operation. 1... Operation knob, 2... First switch, 3...
Second switch.

Claims (1)

[Claims for Utility Model Registration] In a two-mode push switch that can switch modes and turn on/off with a single operating knob, the switch is driven by pushing the operating knob beyond the first stroke, and each time the operating knob is pushed, A first switch that alternately switches between two types of modes, and a second switch that is driven by pushing the operating knob beyond the second stroke, which is set larger than the first stroke, and switches on and off each time it is pushed. A switch is provided, and when the switch is operated over the second stroke, both the first switch and the second switch are switched, and when the second switch is turned on, the first switch returns to the mode in which it was previously turned on. A two-mode push switch featuring: