JPH0440360Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a knob cover for covering a door knob.

[Prior Art] Conventionally, door knobs have been made of metal materials such as surface-treated iron and stainless steel, so in cold weather such as winter, when opening and closing the door, the door knob feels cold on the hand, and Because it has a metallic appearance, it is monotonous and lacks aesthetic sense.Moreover, recently, synthetic fibers have become popular in clothing, furniture, etc., so they generate a lot of static electricity.
There were drawbacks such as receiving an electrical shock when touching the knob.

Therefore, it has become widespread to cover door knobs, and textile products such as cloth and lace are usually used as knob covers.

However, knob covers made of textile products tend to slip easily due to the low frictional resistance at the contact surface between the metal knob and the textile cover, and if they become dirty, they may become deformed when washed, causing the shape to no longer match, or the appearance may deteriorate. There was a disadvantage that it was damaged.

On the other hand, in order to increase the frictional resistance, a cover has been reported in which a non-slip band or a fabric material with frictional resistance such as soft rubber is sewn or adhered to the part of the textile knob cover that comes into contact with the knob body. (Jikko 59-
(Japanese Publication No. 31868, Japanese Utility Model Publication No. 60-20764) However, such covers are time-consuming to sew and adhere, and since they are made of textiles, they generate static electricity and are dirty. In some cases, cleaning would cause deformation, resulting in poor adhesion to the knob and deterioration of appearance.

[Problems to be solved by the invention] The invention improves the drawbacks of the conventional knob cover, and uses a flexible elastic material that has friction resistance against the knob to cover the outer peripheral surface according to the shape of the knob. By forming a plurality of protrusions at intervals on the part that attaches to the knob shaft, the opening is enlarged at least to the extent necessary for the knob body to be inserted. Easy to attach to the knob, and has good adhesion to the knob body and knob shaft.
It is an object of the present invention to provide a knob cover that does not cause electric shock due to the generation of static electricity, is hard to get dirty, and does not become deformed even if it gets dirty and is washed.

[Means for Solving the Problems] That is, the present invention includes a cylindrical covering part that is made of a flexible elastic material that has frictional resistance against the knob body, and a cylindrical covering part that is attached to the periphery of the covering part in the axial center direction. A cover comprising an opening formed with a plurality of spaced apart protrusions that are recessed and attached to a protruding knob shaft, and a flange protruding from the periphery of the opening. be.

Hereinafter, the present invention will be explained based on the drawings.

FIG. 1 is a front view showing one embodiment of the knob cover of the present invention, FIG. 2 is a bottom view, FIG. 3 is an end view taken along line AA, and FIG. 4 is a cross-sectional view showing the state in which the knob cover is attached to a knob. In FIG. 1, the knob cover of the present invention is integrally formed of a flexible and elastic material that has frictional resistance against the knob.
A cylindrical covering part 1 that is attached to the outer circumferential surface of the cover part 1 and six protrusions 3 that are attached to the knob shaft part 12 that is recessed in the axial direction and protrudes from the peripheral edge part 2 of the covering part 1 are arranged between 8. An opening 4 is formed by providing an opening 4, a flange 5 is provided protruding from the periphery of the opening 4, and a reinforcing rib 6 is provided inside the flange 5.

In the knob cover of the present invention, at least two or more protrusions 3 must be provided in order for the maximum outer diameter of the knob to pass through the opening 4, and the number of protrusions 3 can be determined as appropriate depending on the size, shape, etc. of the knob. You can choose.

Further, in order to fit onto the knob shaft, the projection 3 is recessed and protrudes in the direction of the shaft center of the knob, and a recess 7 is formed on the opposite side. The shape of the protrusion 3 is not particularly limited, and for example, a cross-sectional shape of V-shape, circle, triangle, quadrangle, or other polygon can be used.

The flexible elastic material that has frictional resistance against the knob used in the knob cover of the present invention includes synthetic resins such as polyvinyl chloride and polyethylene, or materials that also have electrical insulation, heat insulation, and cushioning properties such as rubber. Among these, polyvinyl chloride is particularly preferred in consideration of moldability and the like.

The flange 5 can be formed into any shape according to the shape of the knob, and is formed to extend perpendicularly or obliquely to the longitudinal direction of the axis of the knob, and is attached to the external seat plate of the knob. It can be provided in various ways.
Further, the flange portion 5 can be formed into a desired shape, for example, so as to have a beautiful appearance such as a petal shape or an umbrella shape. Furthermore, ribs 6 are provided on the flange portion 5 to reinforce it, thereby improving the stiffness caused by the flexible and elastic material.

Further, as shown in FIG. 5, a plurality of narrow linear protrusions 9 extending in the longitudinal direction of the axis are provided on the surface of the cylindrical covering part 1 to make the covering part easy to grip by hand. be able to.

Further, in the knob cover of the present invention, a key operation hole 10 can be formed in the upper end surface of the covering portion 1, as shown in FIG.

As an example of the method for manufacturing the knob cover of the present invention,
An example is a dip molding method for synthetic resins. That is, first, a mold formed into the shape of the knob cover of the present invention that matches the shape of the knob is heated to 50 to 200°C in an electric furnace at 150 to 300°C, and a paste sol of synthetic resin such as polyvinyl chloride is heated. An integrally formed knob cover can be easily obtained by immersing it in water, pulling it up, melting it into a gel, cooling it, and then extracting it from the mold using a high-pressure compressor.

In addition, when forming by the dip molding method, the heated mold is first immersed in a white polyvinyl chloride sol and then gelled, and then immersed in a transparent polyvinyl chloride sol. By gelling, a knob cover with an enamel-like color can be obtained.

As colored transparent polyvinyl chloride, colored polyvinyl chloride is added to 100 parts by weight of transparent polyvinyl chloride.
A resin containing 0.05 to 3 parts by weight, preferably 0.1 to 1 part by weight may be used.

[Operation] To attach the knob cover of the present invention to a door knob, as shown in FIG.
When the knob body 11 is pushed in until the tip face 13 of the knob body 11 reaches the upper end face of the cylindrical covering part 1, the opening 4 is inserted. The protrusion 3 can be easily attached to the knob shaft by its own elastic force.

The knob cover of the present invention is made of a flexible elastic material that has frictional resistance and is integrally formed to match the shape of the knob, so the cylindrical covering part sticks tightly to the knob body, and the protrusion at the opening part is formed by its own elastic force. It is attached closely to the knob shaft.

In addition, since the opening is provided with a gap between a plurality of protrusions that are recessed and protruded in the direction of the axis center,
When attached to the knob, the protrusion is pressed by the knob body and press-fitted into the concave portion on the opposite side, and the gap between the protrusions widens to widen the opening and allow the knob to be inserted easily.

[Examples] Example 1 A knob cover having the shape shown in FIG. 1 was obtained by a dip molding method using polyvinyl chloride resin.

When the obtained knob cover was inserted into a door knob, the opening expanded and it was possible to attach it smoothly by applying an external force.

The knob cover completely adheres to the knob body, feels good when touched, does not shift even when the knob is rotated, and does not generate static electricity even when touched because it is made of insulating material. Ta.

[Effects of the invention] Next, the effects of the knob cover of the invention are listed below.

(1) Since it is made of a flexible and elastic material that has frictional resistance against the knob, it comes into close contact with the knob and allows the door to open and close smoothly.

(2) Due to its insulating properties, static electricity will not be generated when you touch it.

(3) It has a good feel and does not give you a cold feeling even during the cold winter months.

(4) There is little dirt, and even if it gets dirty, the dirt can be easily removed by wiping it with a cloth soaked in water or an aqueous solution containing detergent, or by washing it, and it will not deform even after washing. .

(5) Due to its cushioning properties, the knob will not cause damage even if it comes into contact with other objects or walls when opening or closing the door.

(6) Effective in preventing rust and slipping of knobs.

(7) It is easy to manufacture and inexpensive.

[Brief explanation of the drawing]

Fig. 1 is a front view showing an embodiment of the knob cover of the present invention, Fig. 2 is a bottom view, Fig. 3 is an end view taken along the line AA, Fig. 4 is a sectional view showing the state in which the knob is attached, and Fig. 5 FIG. 2 is a partially longitudinal front view showing another embodiment of the present invention. 1... Covering part, 2... Peripheral part, 3... Protrusion, 4
... opening, 5 ... flange, 6 ... rib, 7 ... recess, 8 ... space, 9 ... protrusion, 10 ... key operation hole, 11 ... knob body, 12 ... knob Shaft, 13
... distal end surface, 14 ... rear end surface.

Claims (1)

[Scope of utility model registration request] A cylindrical covering part that is made of a flexible elastic material that has frictional resistance against the knob, and that is attached to the knob body; 1. A knob cover comprising: an opening formed by spaced apart protrusions; and a flange protruding from the periphery of the opening.