JPH0338865Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a structure for attaching an easily attachable and detachable cover to a casing of a communication device.

[Conventional technology]

Conventionally, this type of cover has generally been screwed onto the housing with small screws, and a locking screw, a screw with a knob, or the like has been used.

[Problem that the invention attempts to solve]

The conventional screw-on structure described above is simple and inexpensive, which is advantageous from the manufacturer's perspective, but on the other hand, from the user's perspective, it is necessary to turn many screws many times in order to remove the cover. Not only is this inconvenient, but screws have the property of loosening due to slight vibrations or temperature changes, so screw tightening should be done under well-controlled conditions. That is, from the standpoint of the user, mounting the cover with screws has the disadvantage that it is not suitable for a cover that is frequently attached and detached.

[Means for solving problems]

According to the present invention, in a cover fastener structure for fixing a communication device casing and a cover,
a cylinder having a hollow interior, a slider housed in the cylinder and movable in one direction, a cam inserted between the sliders, and a cylinder coupled to the cam and moving in a direction perpendicular to the direction of movement of the slider. a shaft that penetrates the housing or the cover, the shaft is inserted into one of the housing or the cover, and the rotation of the shaft rotates the cam and moves the slider, so that the tip of the front slider is inserted into the housing or the cover. A fastener structure is obtained which is characterized in that it is inserted into the other.

〔Example〕

Next, embodiments of the present invention will be described with reference to the drawings.

Fig. 1 is a perspective view of a fastening mechanism according to an embodiment of the present invention, Fig. 2 is a perspective view of Fig. 1 seen from a different angle, Fig. 3a is a sectional view taken along line A-A in Fig. is B
-B sectional view.

In FIGS. 1 and 2, a cylinder 3 formed of synthetic resin and plated with metal has a square shape with a hollow interior, and a cylinder 18 is fixed to the front surface of the cylinder 3. The pair of left and right flanges 11 of the cylinder do not contact the front surface of the cylinder 3. The camshaft 8 passes through the front surface of the cylinder 3 and the cylinder 18, and is rotatably attached. Elastic bars 19 are attached to the front and side surfaces of the cylinder 3 to provide an elastic force to a circumscribed object. A protrusion 16 is provided on the front surface of the cylinder near the center of the elastic bar.

As shown in FIGS. 3a and 3b, a slider 2 movable in a uniaxial direction is inserted into the cylinder 3. Slider 2 is the moving direction (tip)
A protrusion 7 is formed on the protrusion 7, and an elliptical space 5 having a long axis in a direction perpendicular to the direction of movement of the protrusion 7 is formed.

The lower part of the camshaft 8 reaches the oval space 5, and the cam 1 is integrally formed at the lower end. In FIG. 3a, the + mark indicates the central axis of the camshaft 8, and this central axis does not coincide with the center of the cam 1.

FIG. 4 shows a communication device assembled by the above-mentioned fastening mechanism, and is assembled by fixing the bent portion 12a of the cover 12 to the outer surface of the side wall of the housing 6.

5a to 5c show how the fastening mechanism of this embodiment is attached to the cover 12. FIG. cover 12
is provided with a hole 17 in which the cylinder 18 and the flange 11 just engage, a hole 15 in which the protrusion 16 provided on the cylinder 3 engages, and a hole 13. As shown in FIG. 5a, when the flange 11 and cylinder 18 are inserted into the hole 17 and the cylinder 3 is rotated 90 degrees from the state shown in FIG. stops. Also, at this time, since the cylinder 3 and the flange 11 sandwich the cover 12, the cylinder 3 and the cover 12 are sandwiched between the cylinder 3 and the flange 11.
You won't be able to get away from 2. Shaft 8, cylinder 18, and flange 11 protruding from the surface of cover 12
As shown in FIG. 4, a knob 10 is fixed thereto.

6a to 6d are sectional views showing the order in which the fastening mechanism fixed to the cover 12 fixes the cover 12 and the housing 6, a to c are longitudinal sectional views of FIG. 5c, and d is a FIG. First, Figure 6a
As shown in , slider 2 is all cylinder 3
However, as the cam 1 rotates around the center 4 of the camshaft 8 inside the oval space 5 inside the slider 2, the slider 2 moves inside the cylinder 3 as shown in FIG. 6b. , the protrusion 7 of the slider begins to enter the hole 9 of the housing, and the cam 1
At the top dead center of , the protrusion 7 completely fits into the hole 9 of the housing as shown in FIG. 6c. Since the cylinder 3 is fixed to the cover 12, the cover 12 is fixed to the housing 6 by the above movement of the slider 2.
Incidentally, the rotational movement of the cam 1 is performed by manually rotating a knob 10 connected to the camshaft 8.

[Effect of idea]

As explained above, the fastener structure according to the present invention can be attached to the cover of a communication device extremely easily and reliably without using any special tools. Simply twist the knob 180 degrees and the protrusion of the slider will fit into the hole in the housing, allowing you to securely secure the cover to the housing. This not only makes the operation easier, but also has the effect that, unlike the case of screwing, there is no need for quality control regarding the operation.

In addition, by molding the cylinder and slider, which have an elastic function against external pressure, from synthetic resin, we not only keep manufacturing costs low, but also metal plating them, and the back side of the cover where the cylinder is attached and the slider. Maintaining isoelectricity with the hole in the housing that the protrusion engages, ensuring a grounding path of cover → cylinder → slider → housing.
It has the effect of shielding electromagnetic radiation from electronic devices housed within the housing.

[Brief explanation of drawings]

Figures 1 and 2 are perspective views of an embodiment of the present invention, Figure 3a is a cross-sectional view taken along line A-A in Figure 2, figure b is a cross-sectional view taken along line B-B, and Figure 4 is an embodiment of the present invention. A perspective view showing a cover and a housing of a communication device used in Figures 5a and 5b.
FIG. 6c is a perspective view showing the order in which the embodiment of the present invention is attached to the cover, and FIGS. 6a, b, c, and d are sectional views showing the order in which the embodiment of the present invention is attached to the housing. 1...Cam, 2...Slider, 3...Cylinder, 4...Rotation center, 5...Oval space, 6...
Housing, 7... Protrusion (slider tip), 8... Camshaft, 9... Hole, 10... Knob, 11...
Flange, 12... Cover, 13, 14, 15...
... hole, 16 ... protrusion, 17 ... hole, 18 ... cylinder, 19 ... elastic bar.

Claims (1)

[Claims for Utility Model Registration] A cover fastener structure for fixing a cover of a communication device to an object, comprising: a cylinder having a hollow interior; a slider accommodated in the cylinder and movable in one direction; and the slider. a cam that rotates in contact with an inner wall of a hole provided in the cam, and a shaft that extends from the cam to the cylinder along the central axis of rotation of the cam, and whose central axis is offset from the central axis of rotation. A fastener structure comprising: a tip of the shaft is inserted into one of the housing or the cover, and rotation of the shaft rotates the cam to insert the tip of the slider into the other of the housing or the cover.