JPH07114854A - Multiple gang switch with circuit protector - Google Patents

Abstract

PURPOSE:To provide a multiple gang switch with a built-in circuit protector. CONSTITUTION:A multiple switch is provided with a starting push button 3A and a stop push button 3B for releasing a lock condition of the starting push button by pressing operation in a condition that this starting push button is locked to a press operated position. A circuit protector 9 is connected in series to a starting switch 8, and resetting this circuit protector is performed by the stop push button 3B.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multiple switch with a circuit protector which can be used as an operation switch of a device having an electric motor such as a mixer or a juicer.

[0002]

2. Description of the Related Art In a device such as a mixer or a juicer operated by an electric motor, if it is operated in an overloaded state, the electric motor may be burnt. When the current flows, this overcurrent is detected and the circuit is automatically turned off to protect the motor.

On the other hand, as the operation switches, a push button having a function of operating only when the push button is pressed, a push button having a function of being locked in an on state by a lock mechanism when the push button is once pressed, and a push button in a locked state. There are prepared a plurality of push buttons, such as a push button for resetting and a push button having a function of operating at a rotational speed reduced to half that of a normal one. That is, these push buttons are multiple switches in which lock mechanisms are arranged in association with each other.

[0004]

Conventionally, the multiple switches and the circuit protector are incorporated in the apparatus as separate parts. For this reason, it takes time to assemble, and in addition to the plurality of push buttons for operating the multiple switches, the reset push button of the circuit protector must be separately exposed on the case surface. Therefore, there is a drawback that the area of the operation panel surface becomes large.

An object of the present invention is to integrate a multiple switch and a circuit protector, reset the circuit protector by using the push button of the multiple switch, and reduce the number of push buttons appearing on the operation section. It is intended to provide a multiple switch with a circuit protector.

[0006]

According to the present invention, at least two push buttons are provided, and one of the two push buttons operates a switch to be turned on, and the on state is held by a lock mechanism for starting. The other push button operates as a stop push button that unlocks the starting push button and returns it to the off state. Along with this, the stop push button is also configured to act as a reset push button of the circuit protector.

That is, the circuit protector is arranged at the pressing operation position of the stop push button, and the stop push button is operated in a state where the circuit protector reaches the breaking operation, whereby the stop push button is turned on by the start push button. The switch held by is returned to the off state and the circuit protector is also reset to the on state. Therefore, according to the multiple switch of the present invention, the push button for stop operates not only for stop but also as the reset button of the circuit protector, and has two functions, so that the number of push buttons can be reduced. As a result, the area of the operating portion can be reduced.

In the present invention, in addition to the starting push button and the stopping push button, a temporary starting push button is provided. This temporary activation push button unlocks the activation push button locked in the activated state at the time of pressing operation, and temporarily activates the activation switch to supply power to the load. When the pressing force applied to the temporary start push button is released, the push button returns to its original position and the start switch is turned off. Therefore, this temporary activation push button is suitable for temporarily driving a load.

In the present invention, a fourth push button is further provided. The fourth push button turns on and off a switch connected in series with the diode. Therefore, when the fourth push button is pressed, a half-wave rectified pulsating current is supplied to the load through the diode, and the electric power is halved as compared with the case where the AC full wave is supplied. Therefore, when the load is an electric motor, the rotation speed is halved. When the load is a heater, the temperature drops to about half the temperature.

Thus, the fourth push button can be used as a speed control push button or a temperature control push button.

[0011]

FIG. 1 shows an embodiment of the present invention. In the figure, 1 is a case made of an insulating material. Reference numeral 2 denotes a mounting plate mounted on one side surface of the case 1. 3A and 3B indicate push buttons. In other words, 3A is a push button for activation. 3B shows a stop push button. Sliders 4 and 5 are attached to the push buttons 3A and 3B. The sliders 4 and 5 penetrate the mounting plate 2 and the insulating case 1 and are slidably supported.

A spring 6 is mounted on the start push button 3A and the stop push button 3B, and the biasing force of the spring 6 causes the sliders 4 and 5 to move.
A biasing force is elastically applied in the direction of coming out of the insulating case 1. The sliders 4 and 5 are provided with protrusions 4A and 5A in a direction orthogonal to the sliding direction. The protrusions 4A and 5A also serve as stoppers for preventing the sliders 4 and 5 from slipping out of the insulating case, and also as operators for engaging the slide plate 7 constituting the lock mechanism and operating the slide plate 7.

The slider 4 is further provided with a protrusion 4B. The protrusion 4B presses the movable contact piece 8A constituting the start switch 8. The start switch 8 is composed of a movable contact piece 8A and a fixed contact 8B. The slide plate 7 is biased to the left in the illustrated example by a spring 7C. When the start push button 3A is in the non-pressed position, the protrusion 7A provided on the slide plate 7 collides with the protrusion 4A of the slider 4 and is prevented from moving to the left. When the start push button 3A is pressed, the projection 4A is disengaged from the projection 7A. Therefore, the slide plate 7 moves leftward.
Along with this, the slider 4 moves downward, so that the protrusion 4B pushes down on the movable contact piece 8A and contacts the fixed contact 8B. Therefore, the terminals A and B are electrically connected and the load is energized.
At this time, even if the pressing force on the start push button 3A is released,
The protrusion 4A is engaged with the protrusion 7A, the slider 4 is locked in its pressing operation position, and the starter switch 8 is engaged as shown in FIG.
Is kept on.

When the stop push button 3B is pressed in the state shown in FIG. 2, the projection 5A formed on the slider 5 engages with the inclined surface 7B formed on the slide plate 7 to move the slide plate 7 to the right. When the projection 5A reaches the lower end position of the inclined surface 7B, the slide plate 7 is returned to the state shown in FIG. As a result, the protrusion 4A formed on the slider 4 of the starting push button 3A is released from the engagement with the protrusion 7A and returns to the original position.
As a result, the starting switch 8 is returned to the off state, and the energization of the load is stopped. After all, by pressing the start push button 3A, the energization of the load is started,
When the stop push button 3B is pressed, the energization of the load is stopped, and the start and stop operations can be performed.

A bimetal is used for the contact piece 9A connected in series with the starting switch 8. That is, the circuit protector 9 is constituted by the contact piece 9A, the arcuate spring 9B, and the contact point 9C. The contact piece 9A is normally in contact with the contact point 9C, and the circuit protector 9 is maintained in the ON state. When an overcurrent flows through a load (not shown) in this state, an overcurrent flows between terminals A and B. Due to this overcurrent, the contact piece 9A is deformed by self-heating so that the free end portion faces upward as shown in FIG. Due to this deformation, the direction of the reaction force of the bow spring 9B is reversed, and the snap operation is performed so that the state shown in FIG. 4 is obtained. In other words, circuit protector 9
Is automatically shut off.

When the stop push button 3B is pressed in the state shown in FIG. 4, the projection 5A formed on the slider 5 moves the slider 7 to the right, and at the same time, the projection 5B provided on the slider 5 forms a movable contact piece 9A. Engage and displace downward.
When the free end of the movable contact piece 9A is pushed down to the position where it contacts the contact point 9C, the direction of the reaction force of the arc spring 9B is reversed, and the reaction force of the arc spring 9B causes the movable contact piece 9A to be pressed against the contact point 9C. It is returned to the state of 1. Therefore, the stop push button 3
In addition to the function of returning the energized state to the off state, B also has a function as a reset push button for returning the circuit protector 9 to the initial state.

FIG. 5 shows another embodiment of the present invention. In this embodiment, in addition to the start push button 3A and the stop push button 3B,
This is to propose a structure provided with a push button 3C for temporary activation. If the push button 3C for temporary activation is pressed while the push button 3A for start-up and the push button 3B for stop are not pushed, the protrusion 11B formed on the slider 11 extends the movable contact piece 8A constituting the start-up switch 8. Engage the part,
The start switch 8 is controlled to the on state. Therefore, the load is activated. When the pressing force of the temporary start push button 3C is released, the slider 11 is returned to its original position, and the start switch 8 returns to the off state. Eventually, the temporary activation push button 3C operates the activation switch 8 in the ON state only while the push button 3C is being pressed.

On the other hand, if the start push button 3A is pressed and the start switch 8 is kept on, the slide plate 7 moves leftward in this case. Therefore, the projection 11A formed on the slider 11 engages with the inclined surface 7C formed on the slide plate 7 to move the slide plate 7 to the right. As a result,
Although the lock state of the start push button 3A is released, the start switch 8 is maintained in the ON state while the temporary start push button 3C is pressed. When the pressing force applied to the temporary start push button 3C is released, the temporary start push button 3C returns to its original position, and the start switch 8 is returned to the off state.

As described above, by providing the temporary activation push button 3C, it is possible to add the function of temporarily operating the load and the function of releasing the locked state of the activation push button 3A by the temporary activation operation. . FIG. 6 shows a push button 3A for activation.
In addition to the stop push button 3B and the temporary start push button 3C,
The case where a power control push button 3D is added is shown. That is, the movable contact piece 8A forming the start switch 8, the movable contact piece 12A connected to the same potential point as the movable contact piece 9A forming the circuit protector 9 and the fixed contact piece 12B are connected to each other by the third contact piece.
The switch 12 is configured. The third switch 12 is connected in series with the diode 13, and the circuit protector 9, the third switch 12, and the diode 13 are connected between the terminals A and B.
It is configured by connecting a series circuit composed of and. FIG. 7 shows the electric circuit structure.

By pressing the power control push button 3D, the protrusion 14B formed on the slider 14 is moved to the movable contact piece 1.
2A is pushed down to bring the movable contact piece 12A into contact with the contact 12B, and the third switch 12 is turned on. By operating the third switch 12 in the ON state, a pulsating current half-wave rectified by the diode 13 flows through the load.
The half-wave rectified pulsating current has half the electric power as compared with the full-wave alternating current. As a result, if the load is an electric motor, the number of rotations is halved. If the load is a heater, the temperature drops to about half.

The slider 14 attached to the power control push button 3D is provided with a protrusion 14A, and a protrusion 7E is formed on the slide plate 7 in the vicinity of the protrusion 14A. Therefore, the protrusion 14A and the protrusion 7E form a lock mechanism, and the third switch 12 is locked in the ON state by pressing the power control push button 3D. This locked state is released by pressing the stop push button 3B or the temporary start push button 3C.

FIG. 8 shows still another embodiment of the present invention.
Portions corresponding to those in FIG. 4 are designated by the same reference numerals. In this embodiment, the existing circuit protector 30 is coupled to the insulating case 1 of the multiple switch, and the circuit protector 3 is connected.
The reset button 31 of 0 is operated by the stop push button 3B of the multiple switch, and the lock state of the multiple switch is released by pressing the stop push button 3B to stop the energization of the load. A case is shown in which the stop push button 3B is used to perform a reset operation to restore the original state even when the push button 3B is operated.

Insulation case 1 and circuit protector 30
The bond with can be achieved, for example, by the structure shown in FIG. That is, the holding pieces 1A, 1
B is formed, and the body of the circuit protector 30 is held by the holding pieces 1A and 1B. 1C is engaged with the concave portion of the circuit protector 30.
The retaining claw for retaining the

Four square cylinders 1D are formed on the upper surface of the insulating case 1. The sliders 4, 5, are provided in the hollow holes of the rectangular tube 1D.
11 and 14 are inserted and protruded from the inside of the insulating case 1, and the push button 3 is attached to the upper end of each slider 4, 5, 11, and 14.
A, 3B, 3C and 3D are fitted. Sliders 4, 5,
As shown in FIG. 8, the reference numerals 11 and 14 are provided between the rectangular tube 1D and the bottom plate 1E and slidably supported in the vertical direction.
Gives upward bias.

The structure common to the sliders 4, 5, 11, and 14 is that push buttons 3A to 3A are provided on the upper end side as shown in FIGS.
3D fitting portions 4C and 11C are provided, and side surfaces are provided with inclined surfaces 4D and 11D,
A point having vertical surfaces 4E and 11E following the inclined surfaces 4D and 11D, a point having movable contact piece pressing portions 4F and 11F at the lower ends of the vertical surfaces 4E and 11E, and a movable contact piece pressing portion. The point is to provide protrusions 4G and 11G that engage with the bottom plate 1E (FIG. 8) downward from 4F and 11F.

The slidable rod 7 shown in FIG. 8 is formed by the inclined surfaces 4D and 11D formed on the sliders 4, 5, 11, and 14.
7 is driven, and the slide rod 77 causes the groove 4H shown in FIG.
(Or 14H) locks the slider 4 or 14 in the pressed position. That is, the groove 4H (or 14H) is formed only in the sliders 4 and 14 and locked in the pressing position. On the other hand, no grooves are formed in the sliders 5 and 11. The slide rod 77 can be formed by bending a wire rod into a crank shape. Notches 1F formed on the insulating case 1 at both ends of the slide rod 77 (see FIGS. 10 and 1).
2) and is rotatably supported in the insulating case 1. At the same time, the winding spring 77A (FIG. 8) applies a rotation biasing force in the direction in which the rotation free end is in pressure contact with the sliders 4, 5, 11, and 14. Therefore, by pressing the start push button 3A or the power control push button 3D, the slide rod 77 engages with the groove 4H or 14H, and these push buttons 3A and 3D are locked at the pressing positions.

As shown in FIG. 8, a movable contact piece 8A is arranged below the slider 4. When the start push button 3A is pressed, the slider 4 moves downward and pushes down the movable contact piece 8A. As a result, the movable contact piece 8A and the fixed contact 8B come into contact with each other,
The start switch 8 is turned on. When the start switch 8 is turned on, the circuit protector 30
The terminals A and B including is electrically connected.

A movable contact piece 12A is arranged below the slider 14. When the power control push button 3D is pressed, the movable contact piece 12A is pushed down and brought into contact with the fixed contact 12B.
The switch 12 is operated to be turned on. In this case, the terminals A and B are electrically connected through the diode 13. The diode 13 is soldered and connected to the terminals J and K formed on the contact pieces X and Y shown in FIGS. The movable contact pieces 8A and 12A and the terminal C of the circuit protector 30 are connected by the contact piece Z shown in FIG.
Therefore, all of the connections between the starting switch 8, the third switch 12, and the circuit protector 30 can be completed with the contact piece Z, and the assembly can be easily performed.

Even if the start push button 3A and the power control push button 3D are pressed simultaneously, only one of them must be allowed to press. For this purpose, a seesaw 16 is provided between the push buttons 3A and 3D. The seesaw 16 can be configured by a metal plate bent in a U shape shown in FIG.
A square hole 16A is formed on the flat plate surface of the seesaw 16, and the pair of engaging protrusions 1G shown in FIG. 12 are engaged with the hole 16A to perform positioning and receive at the fulcrum 1H to perform seesaw motion. Support as much as possible. By providing the seesaw 16 in this way, even if the push buttons 3A and 3D are pressed at the same time, only one of them is allowed to move downward, and neither of them simultaneously turns on the switches 8 and 12.

When one of the sliders 4 and 14 is locked at the pressing position by the slide rod 77, when the stop push button 3B is pressed, the slide rod 77 causes the inclined surface of the slider 5 (11D shown in FIG. 14). (Corresponding to) is rotated. This rotation operation unlocks the slider 4 or 14, and the slider 4 or 14 is returned to its original position by the biasing force of the spring 6. Therefore, the start switch 8 that was held in the ON state
Alternatively, the third switch 12 is returned to the off state. However, when the push button 3C for temporary activation is pressed, the protrusion 11H is attached to the slider 11 attached to the push button 3C.
(FIG. 14), the projecting piece 11H suppresses the movable contact piece 8A. Therefore, in this case, the start switch 8 does not return to the OFF state and is kept in the ON state.
When the pressing force is released in this state, the slider 11 has no groove for engaging the slide rod 77, so that the slider 11 returns to its original position and the start switch 8 is returned to the off state.

On the other hand, the stop push button 3B is provided with a protrusion 3BB as shown in FIG. The protruding piece 3BB is arranged so as to face the upper end of the reset button 31 of the circuit protector 30. Reset button 3 of circuit protector 30
1 is flipped up when the circuit protector 30 is shut off. When the stop push button 3B is pressed in this state, the projecting piece 3BB engages with the reset button 31 and can be pushed downward. By pressing down the reset button 31 downward, the bimetal provided inside is returned to the original position, and the circuit protector 30 can be reset to the ON state.

Although the embodiment shown in FIG. 8 has been described as having a four-switch structure, two-structure structure in which the push buttons 3C and 3D are omitted and three-structure structure in which only the push button 3D is omitted may be configured. It's easy to see what you can do.

[0033]

As described above, according to the present invention, since the multiple switches interlocking with each other and the circuit protector are integrally formed, it is possible to reduce the mounting time. Circuit protector 9 (or 3
Since the reset operation of 0) is performed by the stop push button 3B of the multiple switch, the number of push buttons can be reduced as compared with the case where the reset button of the circuit protector is arranged in the operation portion of the device. Therefore, there is an advantage that the shape of the device can be reduced.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention.

FIG. 2 is a sectional view for explaining the operation of FIG.

FIG. 3 is a sectional view for explaining the operation of FIG.

FIG. 4 is a sectional view for explaining the operation of FIG.

FIG. 5 is a sectional view showing a modified embodiment of the present invention.

FIG. 6 is a sectional view showing another modified embodiment of the present invention.

7 is a connection diagram for explaining the electrical circuit structure of FIG.

FIG. 8 is a sectional view for explaining still another modified embodiment of the present invention.

9A is a cross-sectional view for explaining details of the embodiment structure shown in FIG. 8, and B is a connection diagram for explaining an electrical structure of the embodiment structure shown in FIG.

10 is a cross-sectional view taken along the line AA shown in FIG.

11 is an exploded perspective view for explaining details of the embodiment structure shown in FIG.

12 is a perspective view for explaining details of the implementation structure shown in FIG.

13 is a perspective view showing an example of the structure of a slider used in the embodiment shown in FIG.

14 is a perspective view showing another example of the structure of the slider used in the embodiment shown in FIG.

15 is a perspective view for explaining the structure of a contact piece used in the embodiment shown in FIG.

16 is a perspective view for explaining the structure of a contact piece used in the embodiment shown in FIG.

FIG. 17 is a perspective view for explaining the structure of a contact piece used in the embodiment shown in FIG.

FIG. 18 is a perspective view for explaining the structure of the seesaw used in the embodiment shown in FIG.

[Explanation of symbols]

 1 Insulation Case 3A Push Button for Starting 3B Push Button for Stopping 3C Push Button for Temporary Startup 3D Push Button for Power Control 4, 5, 11, 14 Slider 6 Spring 7 Slide Plate 77 Slide Rod 8 Start Switch 8A Movable Contact 8B Fixed Contact 9, 30 Circuit protector 9A movable contact piece (bimetal) 9B bow spring 9C fixed contact 12 third switch 12A movable contact piece 12B fixed contact 13 diode

Claims (4)

[Claims] 1. A plurality of pushbuttons, and a lock mechanism that is arranged in association with each other of the pushbuttons and has a function of unlocking another pushbutton in a locked state when one pushbutton is pressed. In a multiple switch including a switch that is turned on and off by each push button, one of the switches is a circuit protector, and this circuit protector and another switch are connected in series to load. Multiple switch with circuit protector characterized by being configured to supply electric power. 2. A. A push button for starting, which is locked in a biased position by a lock mechanism during a pushing operation; A reset push button for releasing the locked state of the starting push button at the time of pressing operation; A start switch that is turned on when the start push button is pressed, and D. A circuit protector that is connected in series with the start switch, reverses to an off state by detecting an overcurrent, and is reset to an on state by pressing the reset push button in the off state; Multiple switch with circuit protector characterized by being configured. 3. A. A push button for starting, which is locked in a biased position by a lock mechanism during a pushing operation; A reset push button for releasing the locked state of the starting push button at the time of pressing operation; A start switch that is turned on when the start push button is pressed, and D. A circuit protector which is connected in series with the start switch, reverses to an off state by detecting an overcurrent, and is reset to an on state by pressing the reset push button in the off state; ． Temporary operation with a function to release the lock state of the starting push button at the time of pressing operation, and a function to operate the starting switch to a temporarily on state and return the starting switch to an off state when the pressing force is released Multiple switch with circuit protector characterized by a push button. 4. The structure of the multiple switch with circuit protector according to claim 3, wherein a fourth push button locks a pressing operation position by a lock mechanism at the time of pressing operation, and the fourth push button.
A multiple switch with a circuit protector, which has a structure in which a switch which is turned on by a push button and is connected in series with a diode is added and electric power is supplied to a load through a series circuit of the diode and the switch.