JP2517083B2 - Lid knob for cooker - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lid knob for a hot plate or a pot type cooker used in general households.

2. Description of the Related Art Conventionally, a lid knob for a cooker of this type has a fifth
It had the structure shown in the figure.

That is, the knob portion (1) is screwed onto the threaded portion (5) protruding from the center of the lid (4).

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention By the way, in the knob portion (1), the thick portion 6 is geometrically formed.
When it is necessary, if a thermoplastic resin is used, sink marks and deformations occur, and the degree of freedom in shape decreases, so a thermosetting resin must be used. In this case, two parts, a knob part 1 and a knob seat 2, are required for the die structure, molding conditions, and post-treatment such as burrs, and a packing 3 made of heat-resistant rubber is required for preventing loosening. Was there.

Then, at the time of assembly, the packing 3 is inserted into the screw portion 5 of the lid 4, the knob seat 2 is fixed, and then the knob portion 1 is rotated to the screw portion 5 and fixed together with the packing 3.

Furthermore, post-processing such as burr finishing is required by using thermosetting resin, and there is a risk of cutting hands if burr remains, and if the user disassembles it for cleaning, reassembly is not possible. It was difficult and there was a problem that parts were lost.

In view of the above, according to the present invention, the lid knob is composed of one component, and loosening can be prevented without the need for components such as packing, and the lid of a cooker is easy to use by holding the thick portion with a large diameter. The first purpose is to obtain the knob.

The second purpose is that even if the flange part is thick and not elastic,
It is to obtain a lid knob for a cooking device which is composed of a single lid knob and can be prevented from loosening without requiring parts such as packing.

Means for Solving the Problems And, in order to achieve the above-mentioned first object, the present invention provides a core inside a lid knob, the outer portion of which is formed of a thermoplastic resin, and a thin portion is formed below the lid knob. A flange composed of a portion is formed, and an outer peripheral edge portion of the flange is in contact with the lid.

In order to achieve the second object, the present invention is configured such that a part of the inside of the lid knob that abuts the upper surface of the screw portion of the lid is made of a heat-resistant rubber core having elasticity.

With the lid knob for the cooker according to the present invention having the above-described configuration, when the lid knob is rotated and fixed to the screw portion of the lid, the outer peripheral edge portion of the flange formed of a thermoplastic resin and formed of a thin portion is first stored. Since the flange portion has elasticity and the lid portion is further rotated, the lid knob is further rotated to tighten the lid knob. As a result, it becomes possible to prevent the lid knob from loosening. And by providing a core inside the lid knob, it can be formed with a large diameter and holds the lid,
Usability improves.

When the lid knob is rotated and fixed, the core touches the upper surface of the screw part of the lid by making the inner part of the lid knob, which comes into contact with the upper surface of the screw part of the lid, made of a heat-resistant rubber core having elasticity. When the core is in contact with the core, the elastic force is generated by the deformation of the core, so that the tightening effect is produced and the lid knob can be prevented from loosening.

Embodiment One embodiment of the present invention will be described below with reference to the accompanying drawings.

In FIGS. 1 and 2, reference numeral 11 denotes a cooker main body, and a heating element 12 is fixed inside the cooker main body 11, and a pan 13 is brought into contact with the heating element 12 for heating. . pot
The upper surface of 13 is covered with a lid 14, and a screw part is provided from a part of this lid 14.
15 protrudes upward.

Reference numeral 16 denotes a lid knob fixed by rotating the screw portion 15 of the lid 14, and the lid knob 16 includes a core 17 and a core 17 in which a part of the thick portion is made of synthetic resin or heat-resistant rubber.
Outer part made of a thermoplastic resin that forms a shape with a core
20, and a flange 18 formed of a thin portion formed at the bottom,
It has a screw portion 21 formed at the center. Reference numeral 19 in the drawing denotes an outer peripheral edge portion of the flange 18, and 22 denotes a space portion generated between the screw portion 21 of the lid knob 16 and the lid 14 when the outer peripheral edge portion 19 of the flange 18 contacts the lid 14.

Next, the operation of the configuration of this embodiment will be described.
When the lid knob 16 shown in FIG. 1 has a thick upper portion and is molded from a thermoplastic resin, sink marks and deformation occur, so the core 17 is molded and then the outer shape portion 20 is molded from the thermoplastic resin. As a result, the flange 18 formed of a thin portion that forms the lower portion of the lid knob 16 can have elasticity. Therefore, when the lid knob 16 is rotated and fixed to the lid screw portion 15, when the outer peripheral edge portion 19 contacts the lid 14 and further tightening is performed, the space portion 22 becomes smaller and the flange 18 has an elastic force. When deformed, the tightening force increases and prevents loosening.

In the embodiment of FIG. 3, when the material forming the outer shape portion 20 does not have elasticity, the core inside the thick portion of the lid knob 16 is
When the lid knob 16 is rotated and fixed to the lid screw portion 15 by molding 17 with a heat resistant rubber such as silicon rubber, the lid screw portion upper surface 23 abuts the core convex portion 24, and the lid knob portion When the core 16 is rotated, the core portion 24 is compressed and deformed to increase the elastic force and prevent loosening. Further, by providing a convex portion 25 on the upper surface 23 of the lid screw portion, the core convex portion 24 is
25 It will be more secure to prevent loosening by making it difficult to insert.

Further, as shown in FIG. 4, by using the shape of the convex portion 25 provided on the upper surface 23 of the lid screw portion as the mold number of the lid 14, the looseness of the lid knob 16 is surely prevented and the appearance is further impaired. The mold number can be hidden by the lid knob 16.

Next, a method of manufacturing the lid knob 16 will be described. In the lid knob 16 where there is a thick part in a part, after molding a part of the inside of the thick part as the core 17, by further forming the outer shape part 20 with the outside of the core 17 as the thin part, It is possible to provide the lid knob 16 that does not cause sink marks or deformation on the outer surface and has no problem in appearance, and by using an inexpensive material for the core 17, the cost of the lid knob 16 can be reduced.

As described above, according to the present invention, since the screw-in type lid knob is made of the thermoplastic resin and the flange made of the thin portion of the lid knob has the elastic force, the outer peripheral edge portion of the flange comes into contact with the lid. By further rotating the lid knob, the flange is elastically deformed and the lid knob is prevented from loosening.

Further, the present invention, by making a part of the inside of the lid knob that comes into contact with the upper surface of the screw part of the lid with a core made of heat-resistant rubber,
When the lid knob is rotated, the core is compressed and deformed by the upper surface of the screw portion of the lid, so that an elastic force is generated in the core and the lid knob is prevented from loosening.

Further, according to the present invention, after molding a part of the inside of the thick portion of the lid knob as a core, and further forming the outer shape as a thin portion outside the core, there is no sink mark or deformation on the outer surface of the lid knob. Further, by using a material having a low material unit price for the core, an inexpensive lid knob can be supplied.

[Brief description of drawings]

1A and 1B are a sectional view and an enlarged sectional view of a lid knob for a cooking device showing an embodiment of the present invention, FIG. 2 is an overall perspective view of the cooking device, and FIG. 4 is a sectional view of a lid knob for a cooking device, FIG. 4A and FIG. 4B are enlarged perspective views of a main portion of the lid knob for the cooking device, and FIG. 5 is a sectional view of a lid knob for a conventional cooking device. 12 …… heating element, 13 …… pan, 14 …… lid, 15 …… lid screw part, 16 …… lid knob, 18 …… flange, 19 …… outer peripheral edge part, 23 …… lid screw part upper surface , 17 …… Core, 20 …… Outer shape part.

Claims (2)

(57) [Claims] 1. A lid knob fixed by being rotated by a screw portion of a lid, wherein a core is provided inside, an outer shape portion of the lid knob is formed of a thermoplastic resin, and a flange made of a thin portion is provided at a lower portion. Then, the lid knob for the cooker configured such that the outer peripheral edge portion of the flange contacts the lid. 2. A lid knob fixed by being rotated by a screw portion of the lid, wherein a part of the inside of the lid knob abutting the upper surface of the screw portion of the lid is made of a heat-resistant rubber core. A lid knob for a cooker consisting of.