JPH0334016Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION This invention relates to a self-holding coil-type alternating changeover switch suitable for turning on and off a heater for defrosting automobile windows, for example, and as a main switch in a constant speed vehicle.

Conventionally, turning on the heater for defrosting car windows,
An example of a switch used for alternate switching such as off is shown in FIG.

In other words, by making a movable iron plate b capable of adhering to a coil a which is excited when a separately provided differential gas switch or the like is turned on, movable iron plate b can be raised and lowered, the actuating plate b ₁ provided on this movable iron plate b can be changed to a change piece c.
The change piece c is rotated around the axis d by engaging alternately in the recesses c ₁ and ₂ c arranged in parallel on the upper surface, and is movable by the indenter e protruding from the lower surface of the change piece c. By slidingly pressing the upper surface of the contact f, the movable contact f can be moved in a seesaw motion, and the fixed contact g ₂ g can be switched with respect to the movable contact f.

However, in this conventional product, the movable contact f is replaced by fixed contacts g ₁ , ₂
Since coil a is excited to alternately switch to g, the load (heater) remains energized unless, for example, a diffuser switch is operated to control the energization to coil a. cannot be blocked. That is, there is a drawback in that simply turning off a power switch such as an ignition switch does not cut off the power supply to the load. Also, a switch was separately provided outside the relay to control the on/off state of the relay.

The present invention was developed in view of the above points, and its purpose is to integrate a relay and a switch for controlling the relay so that it is possible to manually cut off the power to the relay, and to To provide a self-holding coil type alternating changeover switch which can turn on and off energization to the relay and cut off energization to the load by turning off the power switch.

The details of the present invention will be explained below with reference to FIGS. 2 to 6.

1 is a relay having at least one contact point, 2 is an excitation coil for self-holding the armature 6 described later, 3 is a yoke, 4 is a core around which the excitation coil 2 is wound, and 5 is a spring. One end of the leaf spring 5 is fixed to the yoke 3 and biases an armature 6 made of a magnetic material that can be attracted to the core 4 in a direction away from the core 4. installed. In addition, a movable contact A ₁ is provided at the tip of the leaf spring 5.
is installed. _A2 is a fixed contact that the movable contact _A1 can freely connect and separate.

Reference numeral 7 denotes a rotatable change piece whose central portion is fixed by a shaft 8, and the tip of the leaf spring 5 is held in a holding groove 7a provided at the tip of the change piece 7. . Reference numeral 10a is a cylindrical guide member formed on, for example, the front panel 10, into which a mounting shaft portion 11a of an operation knob 11 (described later) is slidably inserted. 11 is an operation knob, and this operation knob 11 has a mounting shaft portion 11 inside the guide member 10a.
a is inserted so that it can move forward and backward, and the guide member 1
It is attached so that it can be freely pushed in via a coil spring 12 placed on the outer periphery of 0a. 11b is the operation knob 11
a flexible switching plate whose end portion is fixed to the mounting shaft portion 11a of the operating knob 1;
1, the switching plate 11b selectively and alternately engages in the recesses 7a ₁ and 7a ₂ , and the change piece 7 rotates left and right around the shaft 8, allowing the leaf spring 5 to move. Contact A ₁ can be switched into and out of contact with fixed contact A ₂ . Reference numeral 13 denotes a stopper for restricting rotation of the change piece 7 by inserting the tip of the change piece 7 into the hole 13a.

In addition, in FIG. 6, an example of the circuit configuration when this embodiment is manually operated is shown.
One movable contact A ₁ is connected to one end of a self-holding excitation coil 2, and the other fixed contact A ₂ is connected to the power source 4 ₁ side. Further, S is a power switch such as an ignition switch, and L is a load such as a defrosting heater placed on a window of an automobile.

One embodiment of the present invention has the above-mentioned configuration, and in the initial state, as shown in FIG. 2, the armature 6 of the relay 1 is not attracted to the core 4, and the movable contact A ₁ and the fixed contact A ₂ is in the off state.

In this state, after turning on the power switch S, push the operating knob 11 against the elastic force of the coil spring 12 to push up the switching plate 11b in the concave portion _7a1 , and the change piece 7 will move the shaft 8. When the relay 1 is rotated counterclockwise around the center, the movable contact _A1 of the relay 1 is switched to the fixed contact _A2 and turned on as shown in FIG. As a result, the excitation coil 2 is energized, the armature 6 is attracted, and the load L is energized.

When the user releases the operating knob 11, only the operating knob 11 returns to its original position due to the restoring force of the coil spring 12.

If you push the operation knob 11 upward from this state,
This time, the changeover plate 11b moves and pushes up the slope of the recessed part _7a2 on the left side of the change piece 7, so the change piece 7 is rotated clockwise around the shaft 8, so that the movable contact _A1 becomes a fixed contact. Move away from A ₂ and turn off. That is, the self-holding of the excitation coil 2 with respect to the relay 1 is released, and the relay 1 returns to the state shown in FIG. 2 again.

Furthermore, when the power switch S is turned off from the self-holding state of the relay 1 as shown in FIG. - Rotate piece 7 clockwise until it becomes as shown in Figure 2.

Moreover, what is shown in FIG. 7 shows a self-hold release circuit for automatic defrost combined with a timer T.

In this configuration example, a diode D is connected in parallel to the excitation coil 2, one end of the excitation coil 2 is connected to the collector of the transistor Tr, and the other end of the excitation coil 2 is connected to a timer connected to the base of the transistor Tr. Connected to T.

Then, when the power switch S is turned on and the operating knob 11 is pressed from the off state of the relay ₁ shown in FIG.
As the change piece 7 is rotated counterclockwise, the movable contact _A1 is switched to the fixed contact _A2 side, the exciting coil 2 is excited, and the armature 6 is attracted to the core 4. Therefore, a load L such as a heater built into the window of the car is energized and heated,
Defrosting is performed. At the same time, timer T is set. As a result, the transistor Tr changes from ON to relay 1, excitation coil 2, and transistor Tr.
Current flows from the collector to the emitter and then to the ground, and the relay 1 is self-held. Timer T
After the set time has elapsed, the transistor Tr is turned off, so that the excitation coil 2 is de-energized. The adsorption of the armature 6 of the relay 1 is released. Since the movable contact _A1 and the fixed contact _A2 are opened, the power supply to the load L is cut off.

Other than that, the operation is the same as that of the circuit shown in Fig. 6,
That is, if the operation knob 11 is pushed in while the timer is operating, the power to the load L is cut off, and also when the power switch S is turned off.

8a and 8b show a second embodiment of the present invention, which differs from the first embodiment in that the arrangement of the relay 1 is changed.

FIG. 9 shows a third embodiment of the present invention. In this embodiment, the shape of the change piece 7 is changed so that the plate spring 6 is held in the holding groove 7a provided on the side surface of the change piece 7, and the operation knob 11 is By changing the arrangement of the guide member 10a etc. to which the operation knob 11 and the switching plate 1 are attached,
1b, the operating direction of the change piece 7, etc. is different from the previous embodiment.

Furthermore, what is shown in FIGS. 10 and 11 is a fourth embodiment of the present invention, and in this embodiment, the rear end of the operation knob 11 is mounted in a storage recess 11a ₁ provided at the tip of the mounting shaft 11a. A switching member _11b ' having a diameter 11b1' is swingably supported by a shaft 13', and one of the locking legs 14a of two coil springs 14 wound in opposite directions around the shaft 13' is The other locking foot 14b of the coil spring 14 is engaged with the locking pin 11c' provided on the switching member 11b'.
By engaging the switching member 11b' to the mounting shaft portion 11a, the switching member 11b' is always maintained in a neutral state by the elastic force of the coil spring 14.

Moreover, what is shown in FIG. 12 is a fifth embodiment of the present invention, and in this embodiment, the armature 6A
This embodiment differs from the first embodiment in that a tension spring 15 is interposed between the armature 6A and the yoke 3 to keep the armature 6A away from the excitation coil 2 at all times.

What is shown in FIG. 13 is a sixth embodiment of the present invention, and in this embodiment, instead of using the excitation coil 2, the rod 16a of the plunger 16 is constantly biased by a coil spring 17. The movable contact _A1 of the leaf spring 5 is always kept in an OFF state with respect to the fixed contact _A2 .

As mentioned above, in the present invention, the power supply to the load can be turned on and off by pressing the operation knob that controls the relay and the switch for controlling the power supply to the relay, and the power supply to the relay can be turned on and off by turning off the power switch. Since the energization can be cut off and the energization to the load can be cut off, even if you forget to turn off the load and turn on the power switch next time, the load will not be energized and there will be no wasted power consumption. Furthermore, it is extremely safe when applied to, for example, a main switch of a constant speed traveling device.

[Brief explanation of drawings]

Fig. 1 is a front view showing an example of a conventional switch, Fig. 2 is a front sectional view showing an embodiment of the present invention with the relay in the OFF state, Fig. 3 is a side sectional view, and Fig. 4 is a front sectional view when switching from off to on, FIG. 5 is a front sectional view showing the self-holding state, FIG. 6 is a circuit diagram showing an example of the circuit configuration, and FIG. 7 is an automatic frost A circuit diagram showing an example of the self-retention release circuit of the present invention, FIG.
8b is a front sectional view showing the embodiment; FIG. 9 is a front sectional view of the third embodiment; FIG. 10 is a front sectional view showing another example of the operation knob; 12 is a front sectional view showing the fifth embodiment of the present invention, and FIG. 13 is a front sectional view showing the sixth embodiment of the invention. 1... Relay, 2... Excitation coil, S... Power switch, 5... Leaf spring, 6... Armature,
7... Change piece, 7a ₁ , 7a ₂ ... Recessed portion, 11... Operation knob, 11b... Switching plate, 14
...Coil spring, _A1 ...Movable contact, _A2 ...Fixed contact, L...Load.

Claims (1)

[Scope of utility model registration request] a relay having an excitation coil, an armature or movable core attracted by the excitation coil, a plate spring that responds to displacement of the armature or movable core, and a fixed contact that connects and separates from the movable contact provided on the plate spring; A change piece that holds the tip of a leaf spring and has its central part rotatably fixed to a shaft, and a
a flexible switching means disposed at a position capable of selectively engaging one of the two recesses; A self-holding coil type alternating switch formed from a displacing operating member.