JPH0575509U - Screw drop prevention cover - Google Patents

Abstract

(57) [Summary] [Purpose] Commercially available screws with washers can be used without any special processing on the screws, making it easy to print or engrave characters or symbols on the panel, (EN) Provided is a screw falling prevention cover capable of easily judging screw screwing disengagement. [Structure] A screw drop prevention cover 30 for preventing a screw screwed to a panel from falling off, including a screw fastener insertion opening 30B and a permanent magnet 30A provided inside the insertion opening 30B.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a screw drop prevention cover suitable for use in a unit such as an electronic device, especially a multiplex wireless device.

[0002]

[Prior Art]

 Conventionally, as this type of screw drop prevention cover, a cover as shown in FIG. 3 is known. That is, the screw 1 is attached to the caulking boss 3 for preventing the screw from being caulked and attached to the panel 2, and the screw 1 is screwed into the screw hole of the caulking boss 3 after attaching the spring washer 4 and the washer 5. .

A small-diameter portion 1 A between the head portion of the screw 1 and the tip screw portion is formed to have a smaller diameter than the female screw 3 A provided on the caulking boss 3. The small diameter portion 1A allows the screw 1 to move freely, but the female screw 3A prevents the screw 1 from falling off.

[0004]

[Problems to be solved by the device]

 In such a conventional screw 1, it is necessary to process a small-diameter portion 1A on a commercially available screw or manufacture it exclusively. Further, the caulking boss 3 for preventing the screws from coming off needs to be manufactured in a shape suitable for the length of the screw 1 according to the thickness of the panel 2. Further, since the caulking boss 3 is fixed (caulked) to the panel 2, it protrudes from the surface of the panel 2, and therefore there is an inconvenience that characters or symbols cannot be printed or engraved on the surface of the panel.

[0005]

[Means for Solving the Problems]

 The present invention is intended to solve the above-mentioned problems of the prior art, and in order to achieve the purpose, a screw fall prevention cover that prevents the screws that are screwed to the panel from falling is inserted. The structure is characterized by including a mouth and a permanent magnet provided inside the insertion opening.

[0006]

【Example】

 Hereinafter, an embodiment of the present invention will be described in detail with reference to FIGS. The same or equivalent members as those shown in FIG. 3 are designated by the same reference numerals and the description thereof will be omitted. The screw 10 is a commercially available screw that is not specially processed, and is a screw in which the spring washer 4 and the washer 5 are incorporated.

The screw drop prevention cover 30 is provided with an insertion opening 30B into which a screw fastener such as a driver can be inserted, and a ring-shaped permanent magnet 30A is provided inside the insertion opening 30B. Is fixed by. Therefore, when the screw 10 is sufficiently loosened, the head of the screw 10 which is a magnetic body is attracted to the permanent magnet 30A, and it can be easily determined that the screw 10 is unscrewed.

Here, it is also possible to set the length of the portion accommodating the screw 10, that is, the length from the permanent magnet 30 B to the surface in contact with the panel 2 to be shorter than the total length of the screw 10.

Since a handle 30C as shown in the drawing is formed on a part of the screw removal prevention cover 30, it is easy and convenient to handle when attaching or detaching the cover. The screw drop prevention cover 30 is fixed to the panel 2 by another screw (not shown).

[0010]

[Effect of the device]

 As described above, according to the present invention, a commercially available washer-incorporated screw can be used without any special processing on the screw, and it is easy to print or engrave characters or symbols on the panel. The use of the permanent magnet has a remarkable practical effect such that the screw engagement can be easily disengaged.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention.

FIG. 2 is a sectional view showing details of the present embodiment.

FIG. 3 is a cross-sectional view showing a structure of a conventional screw drop prevention cover.

[Explanation of symbols]

 2 Panel 4 Spring washer 5 Washer 10 Screw 30 Screw drop prevention cover 30A Permanent magnet 30B Insertion port 30C Handle

Claims (3)

[Scope of utility model registration request] 1. A screw drop prevention cover for preventing a screw screwed to a panel from falling off, comprising an insertion opening for a screw fastener and a permanent magnet provided inside the insertion opening. A screw fall prevention cover. 2. The screw falling prevention cover according to claim 1, wherein a length of a portion for accommodating the screw, that is, a length from the permanent magnet to a surface in contact with the panel is shorter than a total length of the screw. .. 3. The screw drop prevention cover according to claim 1, wherein a handle is provided on a part of the screw drop prevention cover.