JPS6231076Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a knob that is attached to the lid of a cooking device such as a two-handed pot or a frying pan.

Conventionally, as shown in FIG. 1, this type of knob has a wooden knob 1 with an opening 1a on its lower surface and a blind nut 2 (a plurality of claws 2a are formed radially on the outer periphery for fixation and prevention of rotation). In order to attach the knob 1 to the lid, a flat head bolt passing through the through hole was screwed into the blind nut 2 from the back side of the lid.

Therefore, the steam from the cooker during cooking and the water during cleaning will enter the wooden knob through the gap between the flat head bolt and the back of the lid, and the part where Onime Nut 2 is driven will be directly exposed to the steam and water. Because of the exposure, long-term use will cause the wooden parts to corrode,
As a result of rust forming on the nut itself, its function as a blind nut deteriorates, and a phenomenon is observed in which it eventually falls off from the knob 1, that is, the knob 1 falls off from the lid.

The present invention was developed in view of this point, and aims to provide a knob that will not fall off the lid even after long-term use. A wooden knob portion provided with a circular through hole opening at the lower end surface, a disk portion fitted into the circular recess, a cylindrical portion protruding from the lower surface of the disk portion and having a threaded groove inserted into the circular through hole, and the circular hole. This lid knob for a cooker includes a nut integrally molded from thermosetting resin with a required number of claws protruding from the outer periphery of the base end of a cylindrical part and biting into the inner peripheral wall of the circular recess.

Embodiments of the present invention will be described with reference to the drawings.

As shown in the exploded perspective view of FIG. 2, the knob 3 according to the present invention has a thermosetting resin inside the wooden knob 3a, which has good dimensional stability even under relatively high temperatures.
Further, a nut 4 made of phenolic resin or the like having good water resistance and aging resistance is fitted.

That is, the wooden knob portion 3a has a circular recess 3 on the top surface.
b is formed, and a circular through hole 3c, which is smaller in diameter than the circular recess 3b, is bored from the bottom surface of the circular recess 3b to the lower end surface.

The nut 4 includes a disk portion 4a and a disk portion 4a.
a and a cylindrical part 4b protruding from the lower surface of the cylindrical part 4b, and the cylindrical part 4b is provided with a screw groove 4c opening at the lower end surface, and a required number of triangular claws 4d are provided on the outer periphery of the base end of the cylindrical part 4b. They are arranged radially.

In order to facilitate insertion into the circular through hole 3c of the wooden knob portion 3a, the cylindrical portion 4b is formed into a tapered shape with the outer diameter of the lower end slightly smaller than the outer diameter of the base end.

In order to attach the nut 4 to the wooden knob part 3a, the cylindrical part 4b is inserted into the circular through hole 3c, the disc part 4a is fitted into the circular recess 3b, and a striking force is applied to the upper surface of the disc part 4a. In addition, the inclined sides of the claws 4d are bitten into the inner circumferential wall of the circular recess 3b for fixation and rotation prevention, and a cross-section of the interior state is shown in FIG.

The knob 3 configured as described above is attached to the lid by screwing the flat head bolt that protrudes through the lid from the back side of the lid into the screw groove 4c of the nut 4, which is the same as in the conventional example, but the knob of the present invention is attached to the internal nut. Since the nut is made of a thermosetting resin such as phenol resin, rust does not occur due to intruding steam or water, and the nut and the wooden knob are fixed to each other at a position above the wooden knob. Since this is achieved by biting a nail into the inner peripheral wall of the circular recess, the fixing point is at the innermost end of the slight gap between the tapered outer peripheral surface of the nut and the inner peripheral surface of the circular through hole of the wooden knob. As a result, the path for steam and water to enter becomes obstructed, and the corrosion of the wooden knob at the stuck point is significantly reduced compared to the conventional example, and even after long-term use, the knob does not separate from the lid. It will never fall off.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view of a conventional knob, FIG. 2 is an exploded perspective view of the knob according to the present invention, and FIG. 3 is a longitudinal sectional view of the same knob. 3...Knob, 3a...Wooden knob part, 3b...
...Circular recess, 3c...Circular through hole, 4...Nut,
4a...Disc part, 4b...Cylindrical part, 4c...Screw groove, 4d...Claw.

Claims (1)

[Scope of utility model registration request] a wooden knob portion having a circular recess on the top surface and a circular through hole opening from the bottom surface of the circular recess to the lower end surface;
a disc part fitted into the circular recess, a cylindrical part protruding from the lower surface of the disc part and having a threaded groove inserted into the circular through hole, and protruding from the outer periphery of the proximal end of the cylindrical part;
A lid knob for a cooker comprising a nut integrally molded with a thermosetting resin and a required number of claws cut into the inner circumferential wall of the circular recess.