JP2544222B2 - Temporary fixing device - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a temporary fixing device, and more particularly, to a sheet metal member that can be easily fixed to a member to be fixed without using other parts and the fixing can be released. The temporary fixing device.

[Prior Art] Various sheet metal members are used in electronic devices and the like. For example, a shield case, a heat sink, a component mounting chassis, and the like. Some of these sheet metal members need to be temporarily fixed to other members in the process of manufacturing and adjusting the electronic device. For example, it is considered preferable that the shield case attached to the printed circuit board is attached to the printed circuit board when the operation test of the printed circuit board is performed. However, in the process of adjusting the printed circuit board, it is often necessary to remove the shield case and repair or adjust the defective part. For this reason, it is desirable to temporarily fix such a shield case by a method that is easy to attach and detach.

Conventionally, when the shield case is temporarily fixed to the printed circuit board mounting chassis, both are partially fixed by screws, rivets, soldering or the like.

[Problems to be Solved by the Invention] However, in such a conventional temporary fixing method,
Extra parts such as screws, rivets, or solder and special tools were required for temporary fixing. Further, there is also a problem that the work for temporarily fixing and releasing the temporarily fixing becomes complicated and a relatively long time is required.

In view of the problems in the above-described conventional apparatus, an object of the present invention is to make it possible to temporarily fix the sheet metal member and release the fixing very easily in the sheet metal member temporary fixing device without using extra parts. To do.

[Means for Solving the Problem] A temporary fixing device according to the present invention includes a first sheet metal member and a second sheet metal member, and the first sheet metal member is a key formed by cutting and raising upright from a sheet metal surface at a right angle. It has a tongue-shaped spring-like pawl portion obtained by cutting out and lifting the tab-like pawl portion and the sheet metal surface in a U-shape. The second sheet metal member is a linear groove having a narrow groove width, which is movable from a first position where the hook-shaped pawl portion is inserted to a longitudinal direction and is movable to a second position where the hook-shaped pawl portion is locked. The hole, and the spring-like pawl portion is pressed at the first position and is released when the spring-like pawl portion is moved to the second position, and the spring-like pawl portion is inserted into the hook-like pawl portion and the linear groove hole. The slotted groove has a slot width wider than that of the straight slotted hole that prohibits the movement in the direction of releasing the lock of the straight slotted hole. It is provided so as to be located on the line.

[Operation] In the above-described temporary fixing device, when the hook-shaped pawl portion is inserted into the linear slot to shift the engaging positions of the sheet metal members to move from the first position to the second position,
The spring-like pawl portion is inserted into the long groove hole, and the temporary fixing is performed while prohibiting the movement in the direction of releasing the engagement between the hook-shaped pawl portion and the linear groove hole.

In such a temporary fixing state of both members, in order to release the temporary fixing of both members, the spring-like pawl portion is pressed to engage with the long groove hole provided in the second sheet metal member. While releasing, the hook-shaped pawl portion is moved along the linear groove hole in the direction opposite to the temporary fixing direction. As a result, the engagement of the hook-shaped pawl portion with respect to the linear groove hole is released, and the fixation of the first sheet metal member and the second sheet metal member is released. [Examples] Hereinafter, examples of the present invention will be described with reference to the drawings. Will be explained. FIG. 1 shows an outline of a temporary fixing device according to one embodiment of the present invention. That is, as shown in FIG. 1 (a), the temporary fastening device according to the present invention temporarily fixes the sheet metal member 1 to the hook-shaped pawl portion 3 and the spring pawl portion 5 provided on the sheet metal member 1. Slot 9 and locking hole 11 provided in the fixed member 7 of
And The hook-shaped claw portion 3 of the sheet metal member 1 can be configured by, for example, raising a part of the sheet metal member 1 at a right angle from the sheet metal surface. Further, the spring-like pawl portion 5 can be formed by cutting out a part of the sheet metal member 1 into a U shape as shown and slightly lifting it. The fixed member 7 is a slot 9 into which the hook 3 of the sheet metal member 1 can be inserted.
And a locking hole 11 into which the spring-like pawl portion enters when the hook-shaped pawl portion 3 is inserted into the slot 9 and moved in one direction. Although the spring-like pawl portion 5 and the locking hole 11 are provided in the sheet metal member 1 and the fixed member 7 in the drawing, respectively, these members are opposite members, that is, the fixed member 7 and the sheet metal member 1, respectively. Can also be provided.

Next, the temporary fixing and the method of releasing the temporary fixing by such a temporary fixing device will be described. First, as shown in FIG. 1 (a), the hook-shaped claw portion 3 of the sheet metal member 1 is fixed to the fixed member 7.
It is inserted in the slot 9 of. FIG. 1 (b) shows a state in which the hook-shaped pawl portion 3 is inserted into the slot 9. Next, the sheet metal member 1 is moved in the direction shown by the arrow in FIG. 1 (b), and the hook 3 is engaged with the fixed member 7. By moving the sheet metal member 1 in this manner or by moving the fixed member 7 in the opposite direction, finally, FIG.
As shown in FIG. 3, the spring-like claw portion 5 of the sheet metal member 1 enters the locking hole 11 of the fixed member 7. As a result, the return movement of the sheet metal member 1 is prohibited. Incidentally, FIG. 1 (d) shows a plan view in the state of FIG. 1 (c). In other words, first
FIG. 1C is a sectional view taken along the line AA in FIG. 1D.

When the sheet metal member 1 and the fixed member 7 temporarily fixed in this way are released, the spring-like pawl portion 5 of the fixed member 1 is pressed in the direction indicated by the dotted arrow in FIG. 1 (c). Meanwhile, the sheet metal member 1 is moved in the direction in which the engagement of the hook-shaped pawl portion 3 is released as indicated by another dotted arrow. As a result, the hook portion 3 can be pulled out from the slot 9 of the fixed member 7, and the sheet metal member 1 and the fixed member 7 are released from the fixed state.

FIG. 2 shows a sheet metal structure in which the temporary fixing device according to the present invention is applied to the printed circuit board mounting chassis 13 and the shield case 15. In the structure shown in FIG. 2, the bent portion 17 of the shield case 15 is provided with four hook-shaped pawl portions 19 (two of which are hidden by the chassis 13) and four spring-like pawl portions 21 ( Two of them are hidden by the chassis 13). Further, the printed circuit board mounting chassis 13 is provided with four groove holes 23 corresponding to the respective hook-shaped pawl portions 19, and locking holes 25 corresponding to the spring-like pawl portions 21.
4 are provided.

In the structure of FIG. 2, a printed circuit board on which components are mounted is attached to the shield case 15 side of the chassis 13. When the operation check and adjustment of the printed circuit board are performed, the shield case 15 is temporarily fixed to the board mounting chassis 13. That is, after pressing the shield case 15 against the chassis 13 so that the hook-shaped claw portion 19 thereof enters the slot 23 of the chassis 13, the shield case 15 is
Slide in the direction of the arrow in FIG. As a result, the spring-like pawl portions 21 are fitted into the locking holes 25, and the chassis 13 and the shield case 15 are temporarily fixed as described above.
In this state, an operation test etc. of the printed circuit board is performed, but if repair adjustment etc. of the printed circuit board is necessary, while pressing the spring-like pawl portion 21 of the shield case 15 from the locking hole 25 of the chassis 13. Slide the shield case 15 in the direction opposite to the arrow in FIG. As a result, the shield case 15 is separated from the chassis 13. When the adjustment of the printed circuit board is completed as described above, both the shield case 15 and the board mounting chassis 13 are finally temporarily fixed to each other or the housing of the electronic device by the screw holes 27 and 29. Etc.

In addition, in each of the above-described embodiments, the hook-shaped pawl portion and the spring-like pawl portion are both attached to the same member, but they can also be attached to each other. For example, in the structure shown in FIG.
Can be provided on the chassis 13 side and the locking hole 25 can be provided on the shield case 15 side. Further, the locking hole into which the spring-like pawl portion fits does not have to penetrate the chassis 13 and may be a simple recess. Further, the number of hook-shaped pawl portions 19 and the number of spring-like pawl portions 21 can be reduced. Further, instead of the spring-like pawl portion in the above-mentioned embodiment, the pawl portion has no spring property, and the one or the other of the one or the other is formed so as to pass the pawl portion in the vicinity of the mating locking hole or locking recess. The member may be elastic.

[Advantages of the Invention] As described above, according to the present invention, temporary fixing is performed accurately and firmly without using any parts other than the sheet metal member and the fixed member that are temporarily fixed to each other. Further, the temporary fixing and the releasing of the temporary fixing of both members can be performed very easily, and it becomes possible to greatly reduce the working time such as adjustment and testing in the manufacturing process of the electronic device.

[Brief description of drawings]

FIG. 1 is a partial sectional view and a plan view showing a structure and a mounting method of a component mounting device according to an embodiment of the present invention, and FIG. 2 is a structure using a temporary fixing device according to the present invention. It is a perspective view which shows the outline of a body. 1: Sheet metal member, 3: Claw-shaped pawl part, 5: Spring-like pawl part, 7: Fixed member, 9: Groove hole, 11: Locking hole, 13: Chassis for board mounting,
15: Shield case, 17: Bent part, 19: Claw-shaped claw part, 21: Spring claw part, 23: Groove hole, 25: Locking hole, 27, 29: Screw hole.

Claims (1)

(57) [Claims] 1. A first sheet metal member provided with a hook-shaped pawl portion formed by cutting and raising upright from the sheet metal surface and a tongue-shaped spring pawl portion obtained by cutting and lifting the sheet metal surface in a U-shape. A narrow linear groove having a narrow groove width that is movable from a first position through which the hook-shaped pawl portion is inserted to a second position where the hook-shaped pawl portion is locked with the hook-shaped pawl portion, and the first groove. At the position, when the spring-like pawl portion is pressed and moved to the second position, the pressing is released so that the spring-like pawl portion enters and the engagement between the hook-shaped pawl portion and the linear slot is released. A long slot hole having a groove width wider than that of the linear slot hole that is prohibited from moving in the direction is provided so that the longitudinal direction of each hole is parallel or on the same straight line, and temporarily fixed to the first sheet metal member. Temporary fastening characterized by being composed of a second sheet metal member Location.