JPH05327261A - Installation structure of surface plate of communication equipment - Google Patents

Abstract

PURPOSE:To provide an installation structure by which a surface plate covering a front opening of a case completely can be mounted on or removed from the case safely and easily. CONSTITUTION:This is a structure for installing a surface plate 1 removably on a front opening of a box-type case. The surface plate 1 has a rectangular shape and has on a lower side a first bent part 2 which is bent inward in the shape of L and also has on a left and a right side a second bent part 3 which is bent inward in the shape of L. A first square hole 4 is formed near a left and a right corner of the first bent part 2 of the surface plate 1 and a second square hole 6 is formed in a region above the second bent part 3. Near the second square hole 6, a rotary stopper 5 which is energized by a spring in a fixed direction is supported. The case has square holes in which the bent parts of the surface plate fit.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plurality of packages in which electronic parts are mounted on a printed circuit board arranged in parallel in a housing.
In a communication device configured to be housed, a novel structure of a surface plate that completely covers an opening on the front surface of the housing for the purpose of shielding the inside of the housing for protection of the package and measures against electromagnetic field compatibility (EMC), particularly the housing. The present invention relates to a surface plate mounting structure that can be safely and easily attached to and detached from a surface plate.

[0002]

2. Description of the Related Art FIG. 13 shows an example of a conventional attachment / detachment structure for a surface plate of this type. Two types of housings 10 that make up the communication device
1a and 101b are fixed to the front walls of the two columns 102 on the left and right by mounting screws 103, and front plates 104 and 105 are mounted on the front side thereof by mounting screws 106 respectively.
It is attached to 01a and 101b.

[0003]

In order to attach / detach this surface plate, an operator must tighten or loosen the mounting screws while supporting the weight of the surface plate. If you remove this and damage the surface plate,
There was a risk that an accident such as injury of the worker himself would occur. Moreover, the operation of the screw has a drawback in that the workability is poor and a lot of man-hours are required.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above problems in the prior art and to provide a mounting structure for a face plate of a communication device, which can be attached and detached safely and easily.

[0005]

The object of the present invention is to form a rectangular shape having a first bent portion which is bent inwardly in an L shape on the lower side, and has a second bent portion which is bent inward in an L shape on both right and left sides. A structure for removably attaching a surface plate having a bent portion to a front opening of a box-shaped housing, wherein a first square hole is provided near the left and right corners of the first bent portion of the surface plate, and 2 A second square hole is provided in an upper region of the bent portion, a rotatable stopper biased in a certain direction by a spring is pivotally supported in the vicinity of the second square hole, and an operation provided at one end of the stopper The portion is exposed to the outside through the second square hole, and on the other hand, on the front surface of the housing, a forwardly projecting support member engageable with the square hole is fixed at a position corresponding to the first square hole. 2 On the side wall of the housing covered by the bent portion, It is achieved by mounting structure of the surface plate of the communication device, characterized in that the locking portion formed at an end portion of the pair side is provided with engagement angle hole fittable.

[0006]

When the surface plate is attached to the housing, first, the left and right square holes of the first bent portion of the surface plate are hooked on the housing-side support tool to carry the weight of the support tool. The front surface plate is pivoted rearward about the center of the space, and the second bent portion is covered on the side wall of the housing. Then, the locking portion of the stopper, which is biased by the spring and protrudes inward from the second square hole, is displaced about its axial fulcrum by sliding contact with the side wall of the housing, and finally the side wall of the housing is engaged. At a position that coincides with the square hole, the locking portion is fitted into this and positioned / fixed.

To remove the face plate from this state, first,
The operation portion of the stopper exposed from the second square hole is pressed by the fingers of the hand and rotated, and the engagement portion is released from the engagement state with the engagement square hole on the housing side. Then, the surface plate is rotated forward around the support, and finally the first square hole is removed from the support to remove the surface plate. Thus, according to the present invention,
No screw operation is required when attaching or detaching the face plate, improving workability. Further, since the support tool can support the weight of the surface plate to perform the attaching / detaching operation, it is safe.

Hereinafter, based on the preferred embodiment shown in the drawings,
The present invention will be described in more detail.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT FIG. 1 shows a housing 101 located on the lower side of FIG.
FIG. 3 is a perspective view of the front plate used in the first embodiment of the present invention, viewed from the front side, to which the present invention is applied to the non-face plate 105 of a. The lower side of the rectangular surface plate 1 is bent into an L shape to form a first bent portion 2,
The left and right sides are also bent in an L shape to form a second bent portion 3.

First right and left corners of the first bent portion 2 are formed with first square holes 4 extending over two right-angled surfaces.
A second square hole 6 is provided in the upper region of the left and right second bent portions 3, and a stopper 5 to be described later is mounted so as to fit into the square hole 6. On the other hand, as shown in FIG. 2, on the side of the housing 7 to which the surface plate is to be attached, the support tools 8 are fixed so as to project at both left and right corners of the front surface of the bottom plate 7a. The details of the support tool 8 are as shown in the enlarged view, and include a horizontal portion 8a and a vertical portion 8b that rises at a right angle from its tip. In addition, a locking mechanism 21 is provided on the front surface of the left and right side plates of the housing 7, and the above-mentioned second
An engaging square hole 22 is provided at a position corresponding to the square hole 6.

Next, the structure of the stopper 5 will be described with reference to FIG. The stopper 5 includes a box-shaped housing 9 having a rectangular shape with one surface open, and a top 11 that is housed in the housing and pivotally supported by pins 10 on both side walls. The top 11 is always urged to rotate in a fixed direction by a spring 12, and a locking portion 13 formed at the tip of the top protrudes outward from an opening 14 formed in the bottom wall of the housing 9 in a normal state. It is like this. An end portion on the opposite side of the locking portion 13 forms an operating portion 15, and the back surface of the operating portion 15 normally projects to the outside of the housing 9.

Further, a claw 17 is provided at the rear end of the housing 9, and the stopper 5 is engaged by engaging with a locking hole 18 (see FIG. 4) provided on the second bent portion 3 of the surface plate 1. Position it in place. On the other hand, a mounting bracket 16 is provided at the front end of the housing 9, and a stopper positioned at a predetermined position by a claw 17 is provided at a position corresponding to the hole 19 formed in the bracket 16 and the second bent portion 3. It is fixed on the surface plate 1 by riveting through the formed circular hole 20.

The principle of operation of the stopper 5 thus mounted on the surface plate 1 will be described with reference to FIG. FIG. 5a shows the posture of the stopper 5 when the surface plate 1 is attached to the housing 7, and the top 11 is urged clockwise by the action of the spring 12 so that the locking portion 13 and the operating portion 15 are both It is stationary in a state of protruding to the outside of the housing 9, and the locking portion 13 enters into the engaging angular hole 22 to position and lock the surface plate 1.

To release the locked state of the surface plate 1,
As shown in FIG. 5b, the operating portion 15 protruding with the fingers of the hand
May be pressed to rotate the top 11 counterclockwise.
As a result, the locking portion 13 is retracted into the housing 9,
The housing 7 is released from the engagement with the engagement square hole 22 and becomes free. FIG. 6 shows the surface plate 1 using the mounting structure having the above-described structure.
It shows a state in which the operation of attaching and detaching the to and from the housing 7 is being performed. While supporting the left and right second bent portions 3 of the surface plate 1 with both hands, the first square holes 4 provided on the left and right of the lower side of the surface plate 1 are engaged with the support 8 on the housing side, and While supporting the weight of the surface plate 1 by the horizontal portion 8a, the surface plate 1 is rotated in the direction of the arrow about this.

Then, as shown in FIG. 7a, the stopper 5
The slanted surface of the locking portion 13 contacts the locking mechanism 21 provided on the front surface of the side wall of the housing. As the rotation of the face plate progresses,
As shown in FIG. 7b, the tip of the locking portion 13 rotates around the pin 10 and rides on the side wall against the biasing force of the spring 12. Finally, the locking portion 13 reaches the position of the engaging angular hole 22 and enters the engaging angular hole 22 and is locked by the biasing force of the spring 12 as shown in FIG. 7c.
On the contrary, the operation portion 15 projects from the housing 9 and is exposed on the side surface of the surface plate 1 through the second square hole 6.

To remove the surface plate 1 from this state, the operating portion 15 of the stopper exposed by the finger of the hand is pushed in, and the engaging portion 13 engages with the engaging square hole 22 by the action opposite to the above.
And the engagement with the housing 7 is released. Therefore, the upper portion of the surface plate 1 may be rotated rearward around the support tool 8 and finally the engagement with the support tool 8 may be released. In addition, in FIG. 7, the butting metal fitting 23 fixed to the back surface side of the front plate 1 is brought into contact with the front surface of the locking mechanism 21 so that the front plate 1 is not pushed further from the locking completed position. It is for positioning. Note that, instead of the butting metal fitting 23, the upper side of the surface plate 1 may be bent into an L-shape like the first bent portion 2.

FIG. 8 shows another example of the support tools provided at the left and right corners of the front surface of the housing 7. That is, the upper end of the vertical portion 8b on the front surface of the support 8 shown in FIG. 2 is further bent at a right angle in the horizontal direction to form the guide portion 8c. The guide portion 8c has an effect of facilitating the work of placing the surface plate 1 on the support during the attaching / detaching operation. That is, as a practical matter, a considerably fine operation is required to engage the first square hole 4 of the surface plate 1 with the support tool 8.
By providing c, the first bent portion 2 is first placed on the guide portion 8c to support the weight of the face plate 1, and the vertical portion 8b is automatically moved to the first portion by moving the vertical portion 8b to the back.
It becomes possible to engage with the square hole 4.

In the mounting structure of the surface plate described above, when the surface plate is removed from the housing and the hand support is accidentally released with the stopper released, the surface plate rotates about the support tool 8. , There is a risk that the first square hole 4 and the support 8 will be disengaged and fall. A second embodiment which solves these drawbacks is shown in FIG. According to this, the tip edge of the first bent portion 2 provided on the lower side of the surface plate 1 is further bent at a right angle except for the regions of a predetermined width at both left and right ends to form a vertical portion 30 facing the housing side. ing. In the illustrated example, the upper side of the surface plate 1 also forms the first bent portion and the vertical portion, like the lower side. In the lower regions of the left and right second bent portions 3 of the surface plate, hooking portions 31 whose tips are bent at a right angle are also provided in parallel with the vertical portions 30. A notch 32 is formed between the vertical portion 30 and the hook portion 31.

On the other hand, on the housing side, as shown in FIG. 10, a retaining metal fitting 33 is fixed adjacent to the supporting member 8 at the lower front portion of the left and right side plates and integrated with the supporting member 8. The retaining metal fitting 33 has a stepped portion 33a on the front side,
A slope 33b on the rear side and a horizontal guide 33c following the slope 33b
It is equipped with It should be noted that the effect of the present invention is not affected even if the guide portion 33c is omitted.

The operation of attaching the surface plate to the housing according to the second embodiment will be described with reference to FIG. First, the hook portion 3 of the surface plate 1 is attached to the guide portion 33c of the retaining metal fitting 33.
Place the lower end of 1 (Fig. 11a) and slide it to make the slope 3
Move along 3b (FIG. 11b). Then, based on the preset dimensional relationship, the first square hole 4 provided in the first bent portion 2 automatically engages with the support 8 (FIG. 11c). Then, when the surface plate 1 is rotated clockwise in the figure (FIG. 11d), the stopper 5 mounted on the surface plate 1 contacts the side plate of the housing 7 (FIG. 11e), and the first embodiment described in FIG. As in the case of the example, the stopper 5 automatically engages with the engagement square hole 22 to lock its position (FIG. 11).
f).

Next, in the middle of this operation, when the stopper is released and the hand is accidentally released, the face plate 1 is engaged with the first square hole 4 as shown in FIG. 12a. It rotates in the direction of the arrow around the horizontal portion 8a of the supporting tool 8 that is present. Next, when the hooking portion 31 of the surface plate 1 comes into contact with the inclined surface portion 33b of the retaining metal fitting 33, the rotation further continues around this point (FIG. 12b). Then, the housing-side end faces of the notches 32 provided at the left and right corners of the vertical portion 30 on the lower side of the surface plate 1 are rotated while contacting the front end of the retaining metal fitting 33, and finally the notch is formed by the stepped portion 33a. The end face of 32 is received and stopped. In this way, the surface plate is prevented from further turning at two positions, the inclined surface portion 33b and the stepped portion 33a of the retaining metal fitting 33, so that the surface plate is prevented from falling.

[0022]

As described above, according to the present invention, since the screw is not used for mounting the surface plate as in the conventional case, the attaching / detaching operation is facilitated and the work can be performed safely. In particular, with the provision of the fall prevention mechanism, the fall of the surface plate due to an operation error can be completely prevented, and the damage of the surface plate and the injury accident to the human body can be eliminated.

[Brief description of drawings]

FIG. 1 is a perspective view of a surface plate according to a first embodiment of the present invention.

FIG. 2 is a perspective view showing a front surface portion of the housing according to the first embodiment of the present invention.

FIG. 3 is a perspective view showing the structure of a stopper used in the present invention.

FIG. 4 is a perspective view showing an appearance of a stopper attached to the surface plate and an opening provided in the surface plate for attaching the stopper.

FIG. 5 is a side sectional view showing the operating principle of the stopper.

FIG. 6 is a perspective view showing a state in which the surface plate of the first embodiment of the present invention is attached to the housing.

FIG. 7 is a plan sectional view showing a procedure for mounting the surface plate of the first embodiment on a housing.

FIG. 8 is a perspective view showing another example of the support device on the housing side of the present invention.

FIG. 9 is a perspective view of a surface plate of a second embodiment of the present invention equipped with a fall prevention mechanism.

FIG. 10 is a perspective view of the front surface of the housing of the second embodiment of the present invention which also includes a fall prevention mechanism.

FIG. 11 is a side view showing a procedure for mounting the surface plate of the second embodiment of the present invention on the housing.

FIG. 12 is a side view showing the principle of preventing the surface plate from falling according to the second embodiment.

FIG. 13 is a perspective view showing a conventional mounting structure for a surface plate.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Surface plate 2 ... 1st bending part 3 ... 2nd bending part 4 ... 1st square hole 5 ... Stopper 6 ... 2nd square hole 7 ... Housing 8 ... Support tool 8a ... Horizontal part 8b ... Vertical part 8c ... Guide part 9 ... Housing 10 ... Pin 11 ... Top 12 ... Spring 13 ... Locking part 14 ... Opening 15 ... Operation part 16 ... Bracket 17 ... Claw 18 ... Locking hole 19 ... Hole 20 ... Round hole 21 ... Locking mechanism 22 ... Engagement Double-headed hole 23 ... Butting metal fitting 30 ... Vertical part 31 ... Hooking part 32 ... Notch 33 ... Retaining metal fitting 33a ... Stepped part 33b ... Slope part 33c ... Guide part

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Hiroshi Yamachi 1015 Kamiodanaka, Nakahara-ku, Kawasaki City, Kanagawa Prefecture, Fujitsu Limited (72) Inventor ▲ Tsutomu Takahashi 1015, Kamedotaka, Nakahara-ku, Kawasaki, Kanagawa Prefecture Fujitsu Stock In the company

Claims (4)

[Claims] 1. A rectangular shape having a first bent portion (2) bent inward in an L shape on the lower side, and a second bent portion (3) bent inward in an L shape on both right and left sides as well. A structure for removably attaching a front surface plate (1) having a box-shaped housing (7) to a front opening of the box-shaped housing (7), wherein a first plate is provided near the left and right corners of the first bent portion (2) of the front plate. A square hole (4) is provided, a second square hole (6) is provided in an upper region of the second bent portion (3), and a spring (12) is provided near the second square hole (6) in a certain direction. The biased rotatable stopper (5) is pivotally supported, and the operating portion (15) provided at one end of the stopper (5) is exposed to the outside through the second square hole (6), while the housing is provided. On the front surface, at a position corresponding to the first square hole (4), there is provided a support tool (8) projecting forward which is engageable with the square hole. Fix and the second bent portion (3)
On the side wall of the housing that is covered by
5) A structure for mounting a face plate of a communication device, characterized in that an engaging square hole (22) into which an engaging portion (13) formed on the opposite side to 5) can be inserted is provided. 2. The mounting structure for a face plate according to claim 1, wherein the support member (8) is composed of a horizontal portion (8a) and a vertical portion (8b) following the horizontal portion. 3. A horizontal guide part (8c) is provided following the vertical part (8b) of the support (8).
Surface plate mounting structure described in. 4. A retaining metal fitting (3) provided on the housing, adjacent to the support (8), having a stepped portion (33a) facing the surface plate and a sloped portion (33b) facing the housing side.
3) is provided, and a hook portion (31) obtained by further bending the lower portion of the second bent portion (3) into an L shape and the first bent portion (2) are further bent into an L shape on the surface plate. The surface plate mounting structure according to claim 1, further comprising a vertical portion (30) and a notch (32) formed by cutting a corner of the vertical portion (30).