JPH0619179Y2 - Lamp socket - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial field of application> The present invention relates to an incandescent lamp stand for turning on and off a lamp having a coil-shaped movable contact piece made of a shape memory alloy or a thermal protector. Is.

<Prior Art> As shown in FIG. 4, a push-button is generally used as an overheat prevention device for preventing a fire or the like in an incandescent lamp stand, as shown in FIG. With the switch 3a attached, O
It is an N / OFF switch, and it is effective only when the stand base 3 falls down and the tip of the push switch 3a does not come into contact with the floor surface. If they were brought close to or covered, the ambient temperature would rise and there was a risk of burning.

Further, conventionally, no lamp socket 1 is provided with an overheat prevention device inside.

3b is a stand column, 3c is ON during normal use,
This is an OFF switching rotary switch.

<Problems to be solved by the invention> The device having the above-mentioned configuration is a device for turning off under a certain use condition, and burns the equipment due to room temperature, use time, or temperature rise due to abnormality of the equipment. Has the drawback that it does not act like a safety device and requires the attention of the user.

In addition, the push switch is likely to be damaged and the device may be damaged while being carried.

<Means for solving the problem> In this incandescent lamp stand, the present invention is to install an overheat prevention device inside the lamp socket to safely and surely prevent overheating of the equipment under any use condition. In addition, the switch can be prevented from protruding outside the device.

<Operation> In this invention, when the set temperature in the shade is reached, the coiled contact piece movable spring made of a shape memory alloy contracts, the movable contact is pulled up, and the power is turned off. In addition, the thermal protector 13 automatically cuts off the current, and the power is turned off.
Become FF. In both cases, when the temperature falls to the desired temperature, it returns to its original state.

<Embodiment> An embodiment of the lamp socket of the present invention will be described with reference to FIG. 1 and FIG.

FIG. 1 is an external view of an incandescent lamp stand using the lamp socket of the present invention, and FIG. 2 is a sectional view of the lamp socket of FIG.

As shown in FIG. 1, one end of a stand column 3b is provided on the base 3, and a shade 2 is provided on the other end.
The lamp socket body 1 is provided in the lamp socket body 1, and the lamp 20 is attached to the lamp socket body 1.

In FIG. 2, the lamp socket body 1 is formed in a tubular shape, and the inside of the lamp socket body 1 is divided into the first partition 1
a partition wall 1c that partitions the partition wall 1a and the second partition portion 1b is provided, and the central terminal 4 is provided at the center of the partition wall 1c on the first partition portion 1a side.
Further, a receiving metal 5 for holding the lamp 20 in correspondence with the central terminal 4 and for conducting to the lamp 20 is fixed by a fixing means such as an eyelet.
A fixed contact 6 is attached to the upper surface of the boss by welding, and a plate-shaped movable contact piece 8 having a movable contact 7 that is in pressure contact with the fixed contact 6 is provided on the side of the second partition 1b of the partition wall 1c. It is screwed to 10a.

One end of a contact piece movable spring 9 made of a coil-shaped shape memory alloy is hooked in a small hole (not shown) provided in the movable contact piece 8, and the other end of the contact piece movable spring 9 is divided into the above-mentioned sections. Wall 1
It is hooked in a small hole (not shown) of the mounting plate 11 fixed to the boss 10b provided on the side of the second partition portion 1b of c with screws. The contact piece movable spring 9 is memorized so as to contract when the temperature exceeds a certain temperature.

Therefore, the contact piece movable spring 9 is normally operated by the movable contact piece 9.
The movable contact 7 is extended so as to come into contact with the fixed contact 6.

With such a configuration, by covering the shade 2 with a combustible material, the temperature inside the lamp socket body 1 rises, and when the temperature inside the lamp socket body 1 rises above a certain temperature, the contact piece movable spring 9 Contract, the movable contact piece 8 is pulled up, the movable contact 7 and the fixed contact 6 are separated from each other, the power supply to the lamp 20 is cut off, and the lamp 20 becomes OF.
F

When the temperature inside the lamp socket body 1 falls below a predetermined temperature, the contact piece movable spring 9 extends and the movable contact 7 and the fixed contact 6 come into contact with each other, and the lamp socket 20 is turned on.

FIG. 3 shows a reference example in which a thermal protector is used as an overheat preventing device in a device for providing an overheat preventing device in the lamp socket as in the above-mentioned embodiment, which will be described with reference to the drawing.

In the configuration described in FIG. 2, a thermal protector 13 is attached instead of the contact piece movable spring 9 made of a coil-shaped shape memory alloy, and the lead wire on the thermal responsive element side of the thermal protector 13 is provided. 14 is fixed to the upper surface of the receiving metal 5 in the socket body 3 with eyelets 15. One lead edge 16 of the thermal protector 13 on the side of the thermal actuator is connected to a terminal 17 by soldering, and the breaker 17 is a boss 18 provided on the socket body 1a.
It is attached with screws 10 to.

However, when the temperature of the lamp socket 1 rises above the desired temperature, the thermal protector operates, and no current flows and the lamp is turned off.

When the temperature of the lamp socket 1 falls below a desired set temperature, the lamp is turned on to automatically return.

<Effect of the Invention> In the lamp socket of the present invention, if the lamp is covered with a combustible material and the temperature inside the lamp socket exceeds a predetermined temperature,
A contact piece movable spring that contracts due to the temperature inside the lamp socket to separate the movable contact from the fixed contact and shuts off electricity to the lamp is attached by the partition wall to the lamp. Since the contact piece movable spring does not receive the heat of the lamp directly, the operating temperature of the contact piece movable spring can be set to a low temperature, and thermal deformation or fire of the lamp socket due to abnormal heating can occur. Can be surely prevented.

Also, the movable contact piece does not move like the central terminal by attaching and detaching the lamp, and the movable contact piece is always at a predetermined position (position where the movable contact and the fixed contact are in contact). Unlike those that move the terminal, the movable contact piece does not deform due to long-term use, and moreover,
Since the contact state does not change depending on the mounting state of the lamp, it is possible to reliably prevent contact failure or fire even during long-term use.

Since the movable contact piece is moved by the contact piece movable spring made of a shape memory alloy, it is possible to increase the contraction amount of the contact piece movable spring without increasing the size of the movable contact piece. The movable contact piece can be used, the movable contact piece and the fixed contact can be reliably separated from each other, and the current can be interrupted, and safety can be achieved without increasing the size of the lampet body.

[Brief description of drawings]

FIG. 1 is an external view of an incandescent lamp stand, FIG. 2 is a sectional view of a lamp socket in an example using a shape memory alloy, and FIG. 3 is a sectional view of a lamp socket 1 in a reference example using a thermo protector 13, FIG. 4 is an external view in which the conventional push switch 3a is attached to the back side of the stand base 3. 1 ... Lamp socket body, 2 ... Sade, 3 ... Base, 3a ... Push switch, 6 ... Fixed contact, 7 ...
… Movable contact, 8 …… Movable contact piece, 9 …… Movable contact piece spring, 1
3 ... Thermal protector, 20 ... Lamp.

Claims (1)

[Scope of utility model registration request] 1. A lamp socket in which a central terminal is provided in a central portion of a lamp socket body, a conductive receiving metal for mounting a lamp is provided, and a fixed contact is provided on the receiving metal. A partition wall is formed in a tubular shape, and a partition wall that partitions the main body into two partition parts is provided in the lamp socket main body, and the receiving wall is provided in one partition part that is partitioned by the partition wall, and the center is A terminal is provided, a movable contact piece having a movable contact that comes into contact with the fixed contact is provided in the other partition portion, and a boss is provided on the partition wall, and when the temperature inside the lamp socket becomes a certain temperature or more on the boss One end of a contact piece movable spring made of a shape memory alloy that contracts to move the movable contact piece in a direction separating the contact state between the movable contact point and the fixed contact point and shuts off energization to the lamp is provided. Lamp socket, characterized in that the end provided with the movable contact piece.