JPS6038313Y2 - Cover fixing device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a cover fixing device that fixes a cover of a communication device or makes it possible to easily remove a fixed cover.

Conventionally, in order to attach a cover to the housing of various devices, methods such as simply screwing or using a cover fixing device that allows the cover to be easily attached and detached have been used.

Figure 1 is a perspective view showing an example of a conventional removable cover fixing device before it is attached to the casing, and Figure 2 is a perspective view of the cover fixing device shown in Figure 1 shown after it is attached to the casing. FIG.

As shown in FIG. 1, the conventional cover fixing device is constructed by attaching an L-shaped fitting 2 to a mounting hardware 1 together with a drive screw 3 and a coiled spring 4. As shown in FIG.

The drive screw 3 is connected to the L-shaped fitting 2, and the drive screw 3
The L-shaped metal fitting 2 rotates due to the rotation of the L-shaped metal fitting 2, but the rotation angle is regulated by the mounting metal fitting 1.

This cover fixing device is attached to the cover 7 with screws 6.

As shown in FIG. 2, when attaching the cover 7 to the device casing 8, when the drive screw 3 is rotated in the tightening direction, the L-shaped fitting 2 is actuated in the axial direction of the screw 3 at the same time as the drive screw 3 rotates. , the tip of the L-shaped fitting 2 is hooked on a part of the casing 8, a part of the casing 8 is sandwiched between the tip of the L-shaped fitting 2 and the cover, and the cover 7 is fixed to the casing 8. .

When removing the cover 7, by loosening the drive screw 3, a gap is created between the tip of the L-shaped fitting 2 and a part of the contact part of the housing 8, and furthermore, the coiled spring 4 provided in the mounting fitting 1
A large frictional force is applied between the female thread provided on the L-shaped fitting 2 and the male thread of the drive screw 3, and the L-shaped fitting 2 is attached to the drive screw 3.
The rotating cover 7 and the casing 8 are separated in the same direction as the rotating direction, and the cover 7 is removed.

However, since such a conventional cover fixing device is fixed to the cover 7 with a screw 6 that is different from the screw 3 that drives the L-shaped fitting 2, the area and mounting hole for installing the cover fixing device on the cover 7 are required. There was a drawback.

Further, if the cover is repeatedly attached and detached several times, the L-shaped fitting 2 gradually deforms due to the tightening by the drive screw 3, and there is a drawback that it cannot withstand the cover being attached and detached many times.

The present invention eliminates the above-mentioned drawbacks and provides a cover fixing device that is small in size, requires a small installation area, can be easily installed, and has a structure that can withstand multiple times of attaching and detaching the cover and can securely fix the cover.

The cover fixing device of the present invention includes a U-shaped metal fitting having through-holes provided at opposite positions of the upper and lower two horizontal parts of a sheet metal bent in a U-shape, and one of the vertical parts extending longer than the width of the horizontal part; A drive screw consisting of a knob portion and a male threaded portion passing through a through hole of the U-shaped metal fitting, and a rectangular sliding plate having a female screw hole located between two horizontal parts of the U-shaped metal fitting and screwed into the drive screw. a coiled spring located between the two horizontal parts of the U-shaped metal fitting and surrounding the outer periphery of the drive screw; and an annular part having an inner diameter larger than the maximum outer diameter of the male thread part of the drive screw and smaller than the outer diameter of the knob part. a washer having a protrusion that rises in the direction of the central axis of the annular part on a part of the outer peripheral edge of the annular part; and a washer that is attached to the tip of the male threaded part of the drive screw and located outside the horizontal part of the U-shaped fitting. and a holder that prevents the threaded portion from separating from the U-shaped metal fitting.

The present invention will be explained by way of examples.

FIG. 3 is an exploded perspective view of one embodiment of the present invention.

The U-shaped metal fitting 11 is made by bending a sheet metal into a U-shape, and its horizontal portions 11a, llb have through holes 11d, 1
1e is opened, and the width of the vertical part 11c is the width of the horizontal part 11.
a, wider than llb.

Note that the lower horizontal portion 11b is provided with a notch Iff that engages with a rotation prevention protrusion.

The drive screw 12 is inserted into the through holes 11d and 11 of the U-shaped fitting 11.
It consists of a male screw part 12a and a knob part 12b that pass through both of the parts 12a and 12b.

The sliding plate 13 is rectangular and has a female threaded hole 13a into which the male threaded portion 12a of the drive screw 12 is screwed.

The sliding plate 13 is the horizontal part 11a and 11b of the U-shaped metal fitting 11.
and is screwed into the male threaded portion 12a.

The coiled spring 14 is located between the horizontal parts 11a and 11b of the U-shaped fitting 11 and surrounds the threaded part 11a of the drive screw 12.

The washer 15 has a projection 15b rising vertically from a part of the outer periphery of the annular portion 15a.
The outer diameter of the male threaded portion 15a of No. 2 is larger than that of the knob portion 15b.
smaller than the outer diameter of

The holder 16 has an open ring shape and is attached to the tip of the drive screw 12 to prevent the threaded portion 15a from coming off the U-shaped fitting 11 even when the drive screw 12 is rotated.

Next, how to use the cover fixing device of the present invention will be explained.

FIG. 4 is a perspective view showing the embodiment shown in FIG. 3 attached to a housing.

A through hole 7a is formed in the cover 7 to allow the male threaded portion 12a of the drive screw 12 to pass through but not the female threaded portion 12b, and a through hole 7b for the protrusion 15a of the washer 15 to pass through.

The protrusion 15a of the washer 15 is inserted into the through hole 7b from the outside of the cover 7.
After passing the male threaded portion 15a of the drive screw 12 through the cover 7
The annular portion 15a of the washer 15 is passed through from the outside.

Next, the coiled spring 14 and the sliding plate 13 are placed between the horizontal parts 11a and 11b of the U-shaped metal fitting 11, and the through hole 11e1 of the horizontal part is inserted from the back side of the cover 7 to the male screw part 12a.
The holder 16 is attached to the tip of the male threaded portion 12a through the through hole 11d in the horizontal portion of the female threaded hole 13a1 of the sliding plate.

At this time, the protrusion 15b of the washer 15 is engaged with the notch 11f in the horizontal portion so that the U-shaped metal fitting 11 does not rotate.

A housing 8 is placed between the cover 7 and the vertical part 11c of the U-shaped metal fitting.
Attach the cover 7 so that it fits, and rotate the drive screw 12 in the tightening direction.

As the drive screw 12 rotates, the sliding plate 13 screwed into the male threaded portion 12a moves toward the cover 7, thereby compressing the spring 14.

Since the spring 14 pushes the U-shaped metal fitting 11 toward the cover side with its elastic restoring force, the vertical portion 11c moves in the direction of pressing the casing 8, and the cover 7 is fixed to the casing 8.

When removing the cover 7, it is sufficient to rotate the drive screw 12 in the opposite direction and loosen it.

The holder 16 prevents the drive screw 12 from being loosened too much, and prevents the male threaded portion 12a of the drive screw 12 from separating from the U-shaped fitting 11a.

In this embodiment, the holder is in the form of an open ring, but it may be in the form of an ordinary dowel pin.

As explained above, according to the present invention, it is made small and only requires two small holes in the cover, which occupies a small area. Since it utilizes a cover fixing device that does not deform even after being attached and detached many times and can be securely fixed, this is highly effective.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing a conventional cover fixing device before the cover is attached, Fig. 2 is a perspective view showing the conventional cover fixing device after the cover is attached, and Fig. 3 is a perspective view showing the cover attaching state of the conventional cover fixing device. FIG. 4 is an exploded perspective view of the embodiment. FIG. 4 is a perspective view showing the state of the embodiment shown in FIG. 3 after the cover is attached. 1...Mounting bracket, 2...L-shaped bracket,
3... Drive waist 4... Spring, 5...
... Holder, 6 ... Screw, 7 ... Cover 8 ... Housing, 11 ... U-shaped metal fitting, lla, llb ... ...Horizontal part, 11c...
...Vertical part, lid, lle...through hole,
11f...Notch part, 12...Drive screw, 12a...Male thread part, 12b...
Knob section, 13...Sliding plate, 13a...
・Female screw hole, 14... Spring, 15...
Washer, 15a...Annular part, 15b...
Projection, 16... Holder.

Claims (1)

[Scope of utility model registration request] A U-shaped metal fitting with through holes provided in opposing positions of the upper and lower two horizontal parts of a sheet metal bent in a U-shape, with one of the vertical parts extending longer than the width of the horizontal part, a knob part, and the U-shaped part. a drive screw consisting of a male threaded portion passing through a through hole of the metal fitting; a rectangular sliding plate having a female screw hole located between two horizontal parts of the U-shaped metal fitting and screwed into the drive screw; and the U-shaped metal fitting. a coiled spring that surrounds the outer periphery of the drive screw between the two horizontal parts; an annular part having an inner diameter larger than the large outer diameter of the male threaded layer of the drive screw and smaller than the outer diameter of the knob part; and an outer peripheral edge of the annular part. a washer having a protrusion rising in the direction of the central axis of the annular portion on a part of the annular portion; A cover fixing device comprising: a holder that prevents the cover from coming off from the U-shaped metal fitting.