JPS5928187Y2 - Automotive cigarette lighter - Google Patents

Description

[Detailed explanation of the idea] This invention relates to an improvement of an automobile cigarette lighter.

In conventional car lighters, the heater element, which is provided at the tip of the knob, is pushed into the socket body, and the heater case, which is used for heaters, is held between the bimetallic parts of the socket body, and the heater element is energized. When the element reaches a certain temperature and the bimetal opens, the heater case is released and the electricity is cut off.

However, with this type of car cigarette lighter, if you keep pushing the knob, the heater case and bimetal will continue to connect, and the heater element will be continuously energized, causing accidents such as overheating the heater element and melting the knob. There was a drawback.

This idea was made in view of the above drawbacks,
Its purpose is to be extremely compact, to reliably prevent overheating, to reliably prevent deterioration of the bimetal due to the heat of the heater element, and to reliably maintain the non-contact state of the bimetal to prevent arcing, etc. The purpose is to provide an automobile shikaret lighter that can prevent this from occurring.

In order to achieve the above object, the present invention 14. The bimetal is provided separately from the socket main body, and the bimetal's peripheral edge is supported so that its central portion comes into contact with and separates from the terminal by a reversal action due to self-heating.

That is, the plug body, which has a heater case housing a heater element at its inner end, is inserted into and removed from the socket body, which has a contact at the bottom, evenly, and
The contact is electrically connected to a power source via a bimetal automatic circuit switching device that is separate and separated from the socket body, and the bimetal automatic circuit switching device is a bimetallic automatic circuit switching device that is electrically connected to the contact. A supporting case, a terminal electrically connected to the power supply by being insulated and fixed to the case, and a bimetal whose peripheral edge is supported by the case in a curved and reversible manner so that the center contact contacts the terminal. In preparation, when the plug body is pushed in, the contact contacts the heater case and the terminal, and the heater case and the terminal are energized. However, when the bimetal heats itself due to the circuit current and reaches a certain temperature, it reverses and separates from the terminal, disabling the current. It was configured to be blocked.

This invention will be explained in detail below with reference to embodiments shown in the drawings.

As shown in the figure, the automobile cigarette lighter according to this invention includes a socket body 2 that is attached to a hole 1a that is bored at a certain position in a front panel 1 of an automobile, and a socket body 2 that can be loaded into the socket body 2 so as to be freely pushed and pulled. It consists of a plug body 3 and a bimetal automatic circuit switching device 4.

The socket body 2 has a concave portion 5a that corresponds to the hole I in the front panel 1.
A generally cylindrical body 5 is removably screwed onto a cover 6 attached to the front panel 1 so as to be located on the a side, and is electrically insulated from the body 5 at the bottom of the body 5, and Disc-shaped contact 1 connected to power supply
Consists of 0.

Approximately at the center of the lower surface 5b inside the body 5, a plate-shaped plate made of phosphor bronze or the like is inserted through an insulator 9 of a certain thickness by means of a terminal screw 8 inserted through a hole 5C drilled in the center. For those who are installing contact 10,
A writer terminal 1 is inserted into the protrusion 8a of the terminal screw 8 from the hole 5c of the lower surface 5c through an insulator 11.
2 is fixed with a nut 13.

The plug body 3 includes an ash guard 7 that is slidable inside the socket body 2, and a cap 14 that is fitted into the ash card 7 and has a generally inverted U-shaped cross section.
The knob 15 attached to the center of the cap 14 and the surface 14b of the cap 14 opposite to the mounting surface 14a of the knob 15, that is, the surface 14b facing the lower surface 5b of the body 5.
The plug holder 16 is fixed to the plug holder 16.

Surface 14b of cap 14 and projecting portion 1 of ash guard 7
A compression spring 17 is fitted between the plug holder 16 and the ash guard 7 so that the camp 14 can be freely pushed and pulled inside the ash guard 7. The mounting plate 1
8 is installed.

A flange portion 21 is provided on the tip 20a side of the heater rivet 20 that protrudes toward the lower surface 5b side of the body 5 through the mounting plate 18 and a hole 19 that is bored approximately in the center of the mounting plate 18.
Insulator 22, heater case 23, mica 24
is holding.

Further, one end of a heater element 25 is fixed to the tip 20a of the heater rivet 20 within the heater case 23 by, for example, plasma welding, and the other end of the heater element 25 is fixed to the heater case 23, for example. It is fixed by spot welding.

The bimetal automatic circuit switching device 4 has an opening 26a at the bottom.
A holder 27a provided on the inner circumference of the case 26 having
supports the peripheral edge of the dish-shaped bimetal 28 in a reversible manner.

When the bimetal 28 is energized, it generates heat by itself.
When it reaches a certain temperature, it is reversed, and below a certain temperature, for example, as shown in the figure, the terminal 30 is bent downward and fixed to the lower part of the case 26, and the terminal 30 is placed in the center of the insulating washer 29. Installed rivet 31
When the temperature exceeds a certain level, the rivet 31 is in contact with the rivet 31, as shown by the dashed line.

And the terminal 3 in the bimetal automatic circuit switching device 4
The case 26 is connected to the positive terminal of the power source 32, and the case 26 is connected to the writer terminal 12 of the socket body 2.

Further, a negative terminal of the power source 32 is connected to the socket body 2 via a connecting terminal 33.

In the above configuration, when the knob 15 is in the state shown in the figure, the heater case 23 is in a non-contact state with the contacts 10, so the bimetal automatic circuit switching device 4 is not energized, and the bimetal 28 is indicated by the solid line in the figure. It is in the state shown by.

When the knob 15 is pushed into the socket body 2 from this state, the cap 14 resists the biasing force of the spring 17,
It is pushed into the ash guard 7, and the peripheral edge of the heater case 21 contacts the contact 10 from above.

As a result, the terminal 30, rivet 31, bimetal 28, and holder 27a in the bimetal automatic circuit switching device 4
1 case 26, lighter terminal 12 in socket body 2
, the terminal screw 8, the contact 10 and the heater case 23 in the plug body 3, the heater element 25,
Heater head 20, mounting plate 18, plug holder 16,
Canon 14, Ashguard 7, Body 5, Cover 6
An electric circuit is constructed, and the heater element 25 is energized and heated.

Then, after a certain period of time, by releasing the pressing force on the knob 15 and pulling out the plug body 3 from the socket body 2, the power supply to the heater element 25 is cut off, and the heater element 25 heated to a certain temperature can be taken out. can.

In this case, if the heater case 21 continues to contact the contact 10 by inadvertently continuing to push the knob 15, when the heater element 25 reaches a certain temperature, that is, the preset acid of the bimetal 28 A constant temperature is reached due to heat generation due to gas resistivity.

As a result, the bimetal 28 is reversed from the position shown by the solid line to the position shown by the dashed-dotted line, as shown in the figure, and is in a non-contact state with the rivet 31, cutting off the current to the heater element 25 and preventing the heater element 25 from overheating. Ru.

Therefore, the heater element 25 does not overheat and is maintained at a constant temperature, thereby preventing any accidents from occurring.

As detailed above, according to this invention, a heater case can be provided inside the socket body and houses the heater element at the tip of the plug body, which is inserted into the socket body so that it can be pushed and pulled. When brought into contact with a certain contact, the heater element is energized and heated, while the circuit current between the contact and the power supply causes self-heating and temperature rise, and when a certain temperature is reached, the energization of the heater element is stopped. Since the controlling bimetallic automatic circuit opening/closing device is separated and interposed separately from the socket body, it is possible to reliably prevent the heater element from overheating even if the plug body is inadvertently pressed. Accidents such as burnout can be reliably prevented.

In addition, the bimetal automatic circuit switching device can be installed separately from the socket body, so if you install the bimetal automatic circuit switching device in an appropriate space in the car, there is no need to install bimetallic devices inside the socket body. , the temperature can be controlled, and therefore the cigarette lighter body can be configured extremely compactly.

Furthermore, by providing the bimetal separately from the socket body into which the heater element is inserted, the bimetal is not affected by the heat of the heater element at all.

In other words, in lighters that incorporate bimetal into the socket body, the bimetal is placed so that the heat from the heater element in the heater case heats the bimetal, so the bimetal remains in contact with the heater element until the bimetal is reversed. Even after the bimetal is reversed, if the plug body is left in the socket body, it will continue to receive heat from the heater element. The bimetal deteriorated due to heat, making it easy for variations to occur when the disc was turned over.

Furthermore, by supporting the peripheral edge of the dish-shaped bimetal on the case, the central portion can be brought into contact with and separated from the terminal, and a sufficient distance can be maintained between the contact position and the non-contact position of the central portion with respect to the terminal. This makes it possible to reliably prevent the occurrence of arcs and damage to the heater case and contacts.

In other words, in conventional lighters with a bimetal and a socket body, the center of the dish-shaped bimetal is fixed with a terminal screw, so the snapping stroke at the periphery of the bimetal is usually 0.5 m.
It is very small, about 1.5 ft (m), and it is not possible to obtain a sufficient gap when there is no contact between the bimetal and the heater case, making it easy for dust etc. to adhere and arcing to occur, resulting in an electrically unstable state. This caused problems such as damage to the bimetal and heater case.

[Brief explanation of drawings]

The figure is a longitudinal sectional view showing the configuration of an embodiment of this invention. 1...Front panel, 2...Socket body, 3.
... Plug body, 4... Bimetal automatic circuit switching device, 23... Heater case, 25... Heater element, 10... Contact.

Claims (1)

[Scope of utility model registration request] The plug body provided at the inner end of the heater case housing the heater element is inserted into and removed from the socket body which has a contact at the bottom, and the contact is inserted into the socket body separately from the socket body. The bimetal automatic circuit switching device is electrically connected to a power source via a circuit switching device, and the bimetal automatic circuit switching device includes a bimetal support case that is electrically connected to the contacts, and a bimetal support case that is insulated and fixed to the case and electrically connected to the power source. It is equipped with a terminal to be connected, and a bimetal whose peripheral edge is supported by the case in a curved manner so that the central contact contacts the terminal, and which is reversible. A shikaret lighter for an automobile, characterized in that while the case and the terminal are passed through, when the bimetal self-heats due to the circuit current and reaches a certain temperature, it reverses and separates from the terminal, cutting off the current flow.