JPH10188748A - Fall safety switch - Google Patents

Abstract

(57) [Problem] To prevent a fall safety switch from being turned on by another heavy object when an electric stove or the like falls. SOLUTION: A through hole 2 is opened in an upper part of a case 1, a shaft 3 penetrating the through hole 2 from the outside of the case 1 to the inside of the case 1 is provided, and the shaft 3 is suspended in the through hole 2 to extend in a longitudinal direction. A switch 4 that can be moved in and out and can be tilted in the direction in which the shaft swings, and that opens and closes by the movement of the shaft 3 in the extension direction in which the shaft 3 projects outside the case 1.
And a push button 5 is provided in the case 1 in the extension direction in which the shaft 3 projects into the case 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fall safety switch for an electric stove, an electric heater or the like.

[0002]

2. Description of the Related Art As a conventional technique, a push button protruding outside from a lower surface of a body and a switch directly linked to the push button are provided. When the body is erected, the push button is placed on the floor by its own weight. There is a structure in which the switch is turned on by being pressed by the surface, and the push button is returned by a spring when the device falls down, and the switch is turned off by projecting from the lower surface of the body. (For example, Japanese Utility Model Laid-Open No. 57-176035, Japanese Utility Model Laid-Open No. 3-100338, Japanese Utility Model Application No. 57-32506)
No.)

[0003]

In the above-mentioned conventional structure, in the structure having a push button protruding outside from the lower surface of the body, the push button of the body which has fallen down in the event of a large earthquake has another weight. There is a problem that the switch is turned on when the object is held down, which may cause a fire.

[0004]

The present invention has the following configuration to solve the above-mentioned problems.

That is, a through hole is opened in the upper part of the case,
A shaft that penetrates the through hole from the outside of the case to the inside of the case is provided, and the shaft is suspended in the through hole so that the shaft can freely move in and out in the longitudinal direction, and can be tilted in the swing direction of the shaft, and the shaft projects outside the case. A switch that opens and closes by the movement of the shaft is provided in the extension direction, and a push button is provided in the case in the extension direction in which the shaft projects into the case.

Further, a pressing portion is formed on a push button protruding into the case, the pressing portion of the push button is configured to interlock with a pressing portion formed on a lower portion of the shaft, and the case is inclined or rolled over. At this time, the shaft keeps a state of being inclined by its own weight, and even if the push button is pushed into the inside from the outside of the case, the pressing portion of the push button does not press the pressing portion of the shaft, and the shaft does not turn on the switch. It was taken.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A through-hole is formed in the upper part of the case, and a shaft is provided which penetrates the through-hole from the outside of the case to the inside of the case. In addition, a switch that opens and closes by the movement of the shaft is provided in the extension direction in which the shaft protrudes outside the case, and a push button is installed in the case in the extension direction in which the shaft protrudes into the case. With this configuration, the fall safety switch will be turned on during a large earthquake if the body is tilted or falls even if other heavy objects hold down the push button such as a fallen electric stove. Because there is no, at least there is no fire in the above situation, the fall state can be confirmed by the display, and the fall state is continued with the power on It is eliminated.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS.

FIG. 1 is a sectional view of a fall safety switch according to an embodiment of the present invention.

Reference numeral 1 denotes a case, in which a through hole 2 is opened in the upper part, and a shaft 3 is provided which penetrates from the outside of the case 1 into the case 1.

The shaft 3 can be extended and retracted in the longitudinal direction, and the end face 2a and 2b are provided by chamfering the through hole 2 so that the shaft 3 can be tilted around the through hole 2 in the direction in which the shaft swings. Hanged.

At both ends of the shaft 3, flange portions are formed so that the shaft 3 does not come off the case 1.

A switch 4 having switching contacts 4a and 4b is provided in the extension direction in which the shaft 3 projects outside the case 1.

A push button 5 is provided in a case 1 extending in a direction in which the shaft 3 projects into the case 1 with a coil spring 6 interposed therebetween.

At both ends of the push button 5, there are flange portions so that the push button 5 does not come off the case 1.

A coil spring 6 is sandwiched between a wall surface 1a of the case 1 and a step 5b of the push button 5. The coil spring 6 is compressed, and the push button 5 is mounted so as to exert a constant downward pushing force.

The pressing portion 3a of the shaft 3 has a concave shape, and the pressing portion 5a of the push button 5 has a convex shape. When the pressing portion 5a of the push button 5 pushes up the pressing portion 3a of the shaft 3, the convex pressing portion 5a The fitting between the pressing portion 3a and the concave pressing portion 3a provides a structure in which the pressing portion 5a and the pressing portion 3a do not shift in the horizontal direction.

In FIG. 6, reference numeral 7 denotes an electric stove main body, and reference numeral 8 denotes a fall safety switch according to the present invention.

The push button 5 protrudes downward from the legs of the electric stove main body 7, and if the electric stove main body 7 is installed on the floor while standing upright, the push button 7 is pushed down and falls down. In this case, the push button 5 is returned to its original position by the coil spring and projects from the electric heater 7 legs.

Next, the operation of the above configuration will be described.

2, 3, 4 and 5, FIG. 2 is a view showing a state in which the case 1 of the main body is erected and no load is applied to the push button 5.

The push button 5 is pushed down by the coil spring 6.

The shaft 3 is supported by the upper flange as long as the body takes the posture shown in FIG.
The shape protrudes inward, and the axis of the shaft 3 and the axis of the push button 5 coincide.

Since the shaft 3 is below, the switch 4
Is OFF in the open state.

FIG. 3 shows a state in which the case 1 of the main body is erected and the push button 5 is pushed up. As shown in FIG. 6, for example, when incorporated in an electric stove, the main body 7 of the electric stove is erected and installed on the floor. The floor surface is in a state where the push button 5 is pushed up, and is in a normal use state.

When the push button 5 is pushed up, the pushing portion 5a of the push button 5 and the pushing portion 3a of the shaft 3 are fitted, the shaft 3 is pushed up, and the upper part of the shaft 3 pushes up the switch 4 contact piece, and 4 is closed and ON
Becomes

FIG. 4 shows a state in which the case 1 of the main body is inclined or overturned and becomes substantially horizontal.

In the overturning safety switch incorporated in the electric stove, the overturning push button 5 is separated from the floor surface, and the push button 5 is pushed down to the left by the coil spring 6.

However, since the main body is substantially horizontal, the shaft 3 is inclined with the inside of the case 1 facing downward due to gravity, so that the axis of the push button 5 and the axis of the shaft 3 are displaced.

Since the shaft 3 does not press the switch 4, the switch 4 is turned off in the open state.

FIG. 5 shows a state in which the push button 5 is pushed up in a state where the main body is turned over and becomes substantially horizontal.

The overturning safety switch incorporated in the electric stove shows a state in which the overturning push button 5 is separated from the floor surface, but some heavy object moves and the forcibly pushing the push button 5 is performed.

When the push button 5 is pushed in, the shaft 3 is inclined with the inner side of the case 1 downward due to gravity, and the axis of the push button 5 and the axis of the shaft 3 are displaced. The pressing portion 5a of 5 does not fit with the pressing portion 3a of the shaft 3, and the shaft 3 is not pressed. Therefore, the shaft 3 does not press the switch 4, and the switch 4 remains OFF in the open state.

[0034]

As described above, according to the present invention, a through hole is opened in the upper part of the case, a shaft is provided through the through hole from the outside of the case to the inside of the case, and the shaft is suspended from the through hole. A switch that opens and closes in the longitudinal direction and tilts in the direction in which the shaft swings is provided.A switch that opens and closes by moving the shaft is provided in the extension direction in which the shaft projects outside the case, and in the extension direction in which the shaft projects into the case. Push buttons shall be provided in the case,
Further, a pressing portion is formed on the push button protruding into the case, and the pressing portion of the push button is configured to interlock with a pressing portion formed at a lower portion of the shaft. Further, when the case is inclined or rolled over, The shaft keeps the state inclined by its own weight, and even if the push button is pushed into the inside from the outside of the case, the pressing portion of the push button does not press the pressing portion of the shaft, and the shaft turns on the switch.
The electric stove equipped with a fall safety switch is overturned, and even if other heavy objects etc. hold down the push button of the fall safety switch, if the main body is in the overturned position, the push button The switch remains OFF without the load being transmitted to the switch, and at least does not cause a fire in the above state.

[Brief description of the drawings]

FIG. 1 is a front sectional view of a fall safety switch according to an embodiment of the present invention.

FIG. 2 is a front sectional view of a fall safety switch showing one embodiment of the present invention.

FIG. 3 is a front sectional view showing a fall safety switch according to an embodiment of the present invention in a normal use state.

FIG. 4 is a front sectional view showing a fall safety switch according to an embodiment of the present invention when the fall is performed.

FIG. 5 is a cross-sectional view illustrating a state in which a push button of a fall safety switch according to an embodiment of the present invention is pressed. (When falling)

FIG. 6 is a schematic cross-sectional view showing a state in which a fall safety switch according to an embodiment of the present invention is incorporated in an electric stove.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Case 2 Through-hole 3 Shaft 3a Pressing part 4 Switch 5 Push button 5a Pressing part

Claims (2)

[Claims] A shaft (3) is provided in the upper part of the case (1) to open a through hole (2) in the upper part of the case (1) and penetrates the through hole (2) from the outside of the case (1) to the inside of the case (1). (3) is suspended in the through hole (2) so that the shaft can freely move in and out in the longitudinal direction and can be tilted in the direction in which the shaft swings, and the shaft (3) is extended in the extension direction in which the case (1) projects outside. Switch (4) that opens and closes when (3) moves
And the push button (5) is extended in the direction in which the shaft (3) projects into the case (1).
A fall safety switch, which is provided inside. 2. A pressing portion (5a) is formed on a push button (5) projecting into the case (1), and the pressing portion (5a) of the push button (5) is formed on a lower portion of the shaft (3). When the case (1) is inclined or rolled over, the shaft (3) is kept in an inclined state by its own weight, and the push button (5) is moved to the case (3). 1) Even if the push button (5) is pushed in from the outside, the push portion (5a) of the push button (5) does not push the push portion (3a) of the shaft (3), and the switch (4) is turned on by the shaft (3). 2. The fall safety switch according to claim 1, wherein the switch is not operated.