JPH0223983Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a mounting structure for an automobile cigarette lighter knob.

Conventional Technology and Problems Conventionally, the knob of a cigarette lighter installed in a car is fixed by caulking a female thread formed on the knob and a heater, as disclosed in Japanese Utility Model Application Publication No. 58-112858. It is screwed onto a male screw fixed to the base. Screwed knobs may loosen due to vibrations of the car, etc. The loosening torque of a knob screwed with a screw member is about 0.2 [Kg·m] to 0.3 [Kg·m], so the use of an adhesive is essential. Further, in the assembly work, there is a rotation work for screwing the knob, which results in poor work efficiency. The screwed base and knob are both pressed and fixed by a mechanical chuck. Therefore,
The claws of the chuck may cause damage to the base and knob.

Means for Solving the Problems The mounting structure of an automobile cigarette lighter knob according to the present invention includes, in a plug 1 of an automobile cigarette lighter, a knob 3 to which a rivet 2 is fixed, and a push nut 4 crimped to the rivet 2. The above-mentioned problems are solved by providing a base 6 which is crimped and fixed to the heater cap and its connecting member, and a base body 7 which has the push nut 4 and the base 6 integrally fixed.

Embodiment of the present invention The knob 3 is for operating a cigarette lighter. A rivet 2, which serves as a shaft, is then fixed. The knob 3 has a blind hole 3a that fits into the base body 7 and a spring receiving portion 3b for the spring 8 formed inside. Pushnuts 4
is molded integrally with the base body 7, and is press-fitted to the rivet 2 by press-fitting the rivet 2 into the push nut 4. Pushnuts 4
A plurality of tooth portions 4a having elasticity are formed in the center. The heater cap 5 is integrally crimped and fixed with the heater 10, the insulator 11, the insulator 12, and the stopper 13 by a crimping shaft 9. The base 6 has one end crimped and fixed to the stopper plate 6,
The other end is molded integrally with the base body 7. The base body 7 is a substantially cylindrical member made of resin, and the push nut 4 and the base 6 are integrally molded. The base body 7 fits into the blind hole 3a of the knob 3.

Function When attaching the knob 3 to the plug 1, it is fixed by press-fitting the rivet 2 integrally molded on the knob 3 into the push nut 4 of the plug 1, and furthermore, the base body 7 is fitted into the blind hole 3a of the knob 3. By matching, the knob 3 can be firmly fixed to the plug 1 without swinging. In this case, the length of the rivet 2 molded on the knob 3 is lengthened,
In addition, by increasing the length of the knob 3 and the fitting portion of the base body 7 that fits into the knob 3, the strength against radial loads can be increased. The knob 3 can be attached to the plug 1 by press-fitting the rivet 2 into the push nut 4 and fitting the blind hole 3a of the knob 3 into the base body 7. Therefore, installation work is simple and
Work time can be shortened. Also, knob 3
When fixing the rivet 2 to the base body 7 and the rivet 2 to the push nut 4, the thrust load for press-fitting can fix the knob 3, making it unnecessary to fix the knob 3 with a chuck, which prevents damage to the knob 3. can be prevented. The knob 3 is fixed by the friction force caused by the fitting between the blind hole 3a and the base body 7 and the press-fitting between the rivet 2 and the push nut 4, and the slack thrust load of the fixed knob 3 is experimentally about 50 kg. Therefore, knob 3
No adhesive is required to fix the plug 1 to the plug 1. By using the same steel material for the rivet 2 and the push nut 4, there is no large difference in linear expansion coefficient, so there is no loosening when the heat from the heater 10 is conducted to the fitting part of the knob 3 and plug 1. .

Although the knob of an automobile cigarette lighter has been described in detail as an example of the automobile cigarette lighter knob mounting structure according to the present invention, the present invention can also be used as a means for attaching an operating knob of a switch or the like.

Effects of the present invention The mounting structure of the automobile cigarette lighter knob according to the present invention is such that a rivet is integrally molded on the knob of an automobile cigarette lighter or a switch, and a push nut fixed to the plug that is the main body is press-fitted. As a result, since the knob is attached, the installation work becomes simple and the time required for the installation work can be reduced. And the loose thrust load of the fixed knob is about 50Kg.
Therefore, no adhesive is required. Further, since the knob is fixed by press-fitting the push nut integrated with the plug into the rivet integrated with the knob, damage to the knob during the knob installation work can be prevented.

[Brief explanation of the drawing]

1, 2, and 3 are drawings showing the mounting structure of an automobile cigarette lighter knob according to the present invention, FIG. 1 is a cross-sectional view of a plug of an automobile cigarette lighter, and FIG. 2 is a knob. FIG. 3 is a cross-sectional view of the plug during installation work, and FIG. 3 is a perspective view of the push nut. 1...Plug, 2...Rivet, 3...Knob,
3a...Blind hole, 4...Push nut, 4a...
Teeth, 6...Base, 7...Base body, 10...
…heater.

Claims (1)

[Scope of utility model registration request] A plug for an automobile cigarette lighter, including a knob to which a rivet is fixed, a push nut crimped to the rivet, a base crimped and fixed to a heater cap and its connecting member, and a base to which the push nut and base are fixed integrally. A mounting structure for an automobile cigarette lighter knob, characterized by comprising a main body.