JPH03230599A - Temporarily fastening device - Google Patents

Abstract

PURPOSE:To easily release the temporary fixation or the fixation of a sheet metal member without using an excess part by making a first claw portion hook-like and making a second claw portion resilient. CONSTITUTION:The hook-like claw portion 3 of a sheet metal member 1 is inserted into an elongated opening 9 in a member 7 to be fixed, the sheet metal member 1 is moved in a direction shown by an arrow and the hook-like claw portion 3 engages the member 7 to be fixed. Since the resilient claw portion 5 of the sheet metal member 1 is inserted into the engaging opening 11 of the member 7 to be fixed by moving the sheet metal member 1 as above, the returning movement of the sheet metal member 1 is forbidden. When a fixation is to be released, the sheet metal member 1 is moved in a direction wherein the engagement of the hook-like claw portion 3 is released as shown by a dotted arrow while pressing the resilient claw portion 5 of the sheet metal member 1 in a direction shown by the other dotted arrow. Thus, the the hook-like claw portion 3 can be pulled out of the elongated opening 9 of the fixed member 7 whereby the fixation of the sheet metal member 1 and the fixed member 7 is released.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a temporary fixing device, and particularly to a temporary fixing device that can easily fix and release a sheet metal member to a member to be fixed without using other parts. The present invention relates to a temporary fixing device.

[Prior Art] Various sheet metal members are used in electronic devices, such as shield cases, heat sinks, chassis for mounting parts, etc. Among these sheet metal parts, there are some that need to be temporarily fixed to other parts during the manufacturing and adjustment process of electronic equipment. It is considered preferable to attach it to the printed circuit board when conducting tests or the like. However, in the process of adjusting a printed circuit board, it is often necessary to remove the shield case to repair or make adjustments to defective parts. For this reason, it is desirable to temporarily fix such a shield case in a manner that makes it easy to attach and detach.

Conventionally, when temporarily fixing a shield case to a chassis for mounting a printed circuit board, the two were partially fixed using screws, rivets, soldering, or the like.

[Problem to be solved by the invention] However, such conventional temporary fixing methods require extra parts such as screws, rib lifts, or solders, and special tools for temporary fixing. . Moreover, there is also the disadvantage that the work for temporarily fixing and releasing the temporary fixing becomes complicated and takes a relatively long time.

SUMMARY OF THE INVENTION In view of the problems with the conventional devices described above, an object of the present invention is to provide a temporary fixing device for sheet metal members that can extremely easily temporarily fix and unfix sheet metal members without using any extra parts. It's about doing.

[Means for Solving the Problems] A temporary fixing device according to the present invention is a device for temporarily fixing a sheet metal member to a member to be fixed, and is provided on either the sheet metal member or the member to be fixed. a first claw portion and a first groove portion provided in the other member for inserting the first claw portion; a second claw portion provided in either one of the two members; This second
A second collar part into which a pawl part enters to restrict relative movement of both members is provided. Further, in one aspect, the first claw portion is hook-shaped, and the second claw portion is springy.

U action] In the above-described temporary fixing device, for example, the hook-shaped first
By inserting the pawl into the first shoulder and moving it in one direction, the sheet metal member and the fixed member are brought into a movably engaged state. Then, as the first claw moves in the one direction, the second claw, which has a spring property, for example, enters a second shoulder provided on the mating member. As a result, the return movement of the first claw portion is prohibited, and the sheet metal member and the member to be fixed are temporarily fixed.

In such a state where both members are temporarily fixed, in order to release the temporary fixation of both members, press the second pawl to engage the second shoulder provided on the other member. While releasing the joint, the first pawl portion is moved along the first shoulder portion in a direction opposite to that during temporary fixation. As a result, the engagement of the first claw portion with the first shoulder portion is released, and the fixation of the sheet metal member and the fixed member is released.

[Example] Hereinafter, the present invention will be explained in detail with reference to the drawings.

FIG. 1 schematically shows a temporary fixing device according to an embodiment of the present invention. That is, as shown in FIG. It includes a hook-shaped claw portion 3, a spring claw portion 5, and a slot 9 and a locking hole 11 provided in a fixed member 7 for temporarily fixing the sheet metal member 1. The claw-like claw portion 3 of the sheet metal member 1 is
For example, it can be constructed by raising a part of the sheet metal member 1 at right angles from the sheet metal surface. Further, the spring claw portion 5 can be constructed by cutting out a part of the sheet metal member 1 into a U-shape as shown in the figure and slightly lifting it up. The member to be fixed 7 has a slot 9 into which the hook-like pawl 3 of the sheet metal member 1 can be inserted, and a spring-like pawl into which the hook-like pawl 3 is inserted when the hook-like pawl 3 is inserted into the slot 9 and moved in one direction. Locking hole 1 for
1. In addition, the spring claw portion 5 and the locking hole 11
In the figure, these are provided on the sheet metal member 1 and the fixed member 7, respectively, but they can also be provided on the opposite members, that is, the fixed member 7 and the sheet metal member 1, respectively.

Next, a method of temporarily fixing and releasing the temporary fixing using such a temporary fixing device will be explained. First, as shown in Fig. 1 (a), the hook-shaped claw portion 3 of the sheet metal member 1 is inserted into the slot 9 of the fixed member 7. Fig. 1 (b) shows that the hook-shaped claw portion 3 is inserted into the slot Next, the sheet metal member 1 is inserted into the first
It moves in the direction shown by the arrow in Figure (b) and engages the hook-shaped pawl portion 3 with the member to be fixed 7. By moving the sheet metal member 1 in this manner, or by moving the fixed member 7 in the opposite direction, the spring pawl portion 5 of the sheet metal member 1 is finally fixed as shown in FIG. 1(C). enters the locking hole 11 of the fixed member 7.

As a result, return movement of the sheet metal member 1 is prohibited.

In addition, FIG. 1(d) shows a plan view in the state of FIG. 1(c). In other words, FIG. 1(c) is a plan view of the state of FIG. 1(d).
This is a cross-sectional view taken along line A-A in FIG.

When releasing the fixation of the sheet metal member 1 and the fixed member 7 temporarily fixed in this way, press the spring claw portion 5 of the fixed member in the direction shown by the dotted arrow in FIG. 1(c). At the same time, the sheet metal member 1 is moved in the direction in which the hook-shaped pawl portion 3 is disengaged, as shown by the other dotted line arrow. As a result, the hook-shaped pawl portion 3 can be removed from the slot 9 of the member 7 to be fixed, and the fixation of the sheet metal member 1 and the member 7 to be fixed is released.

FIG. 2 shows a sheet metal body in which a temporary fixing device according to the present invention is applied to a printed circuit board mounting chassis 13 and a shield case 15. In the horizontal corpse shown in FIG. 2, one of four hook-shaped claws (two hidden in the chassis 13) is provided in the folded part 17 of the shield case 15,
In addition, four spring claws 21 (two of which are hidden in the chassis 13) are provided. Further, the printed circuit board mounting chassis 13 is provided with four slots 23 corresponding to each of the hook-shaped fittings 19, and locking holes 25 corresponding to the spring fittings 21. There are four.

In the horizontal corpse shown in FIG. 2, a printed circuit board on which components are mounted is attached to the shield case 15 side of the chassis 13. When checking or adjusting the operation of this printed circuit board, use the board mounting chassis 1.
This is done by temporarily fixing the shield case 15 to the chassis 1.
After pressing the chassis 13 into the slot 23 of No. 3,
Slide the shield case 15 in the direction of the arrow in FIG. As a result, each spring fitting portion 21 fits into the locking hole 25, and the chassis 13 and the shield case 15 are temporarily fixed as described above.

In this state, the printed circuit board is tested for operation, but if the printed circuit board requires repair or adjustment, press the spring pawl 21 of the silt case 15 through the locking hole 25 of the chassis 13. Slide the shield case 15 in the direction opposite to the arrow in FIG. Thereby, the shield case 15 is separated from the chassis 13. still,
When the adjustment of the printed circuit board is completed as described above, the shield case 15 and the board mounting chassis 13 are finally fixed to each other or to the housing of an electronic device, etc. using the screw holes 27 and 29 while they are both temporarily fixed. Fix it.

In addition, in each of the above-mentioned embodiments, both the hook-shaped pawl portion and the spring-like pawl portion are attached to the same member;
These can also be attached to each other's members.
For example, in the case of corpse m shown in FIG.
It can also be provided on the 5th side. Furthermore, the stop hole into which the spring claw fits may not be one that passes through the chassis 13, but may be a mere recess.Furthermore, the number of hook-shaped claws and the number of spring claws 21 may be further reduced. can. Further, instead of the spring-like pawl in the above-described embodiment, the pawl is made of a spring-like pawl, and the one or the other is made to pass through the pawl in the vicinity of the locking hole or recess of the other. The member may also be elastic.

[Effects of the Invention] As described above, according to the present invention, temporary fixing can be performed accurately and firmly without requiring any parts other than the sheet metal members to be temporarily fixed to each other and the member to be fixed. In addition, the temporary fixing and release of the temporary fixing of both members is extremely easy.
It becomes possible to significantly shorten the work time for adjustments, tests, etc. in the manufacturing process of electronic devices.

[Brief explanation of drawings]

FIG. 1 is a partial cross-sectional view and a plan view showing the structure and attachment method of a component attachment device according to an embodiment of the present invention, and FIG. It is a perspective view showing an outline. 1: Sheet metal member, 3: Hook-shaped pawl, 5: Spring pawl, 7: Fixed member, 9: Slot, 1
1: Locking hole, 13: Board mounting chassis 15: Shield case, 17: Bend part, 19:
Hook-shaped pawl portion, 21: Spring pawl portion, 23: 34 holes, 25: Locking hole, 27.29: Screw hole.

Claims (1)

[Claims] 1. A first groove is provided in one of the sheet metal member and the member to be fixed, and a first claw is provided in the other, and the first claw is inserted into the first groove and moved in one direction. Both members are movably engaged, and one of the two members is provided with a second groove portion and the other is provided with a second claw portion, and the movement in the one direction causes the second claw portion to engage with the second groove portion. A temporary fixing device that temporarily fixes the sheet metal member to the member to be fixed by entering the groove portion of the member and restricting the engagement position of the two members due to the movement.