JPH0936567A - Fitting structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable a case main body and a lid to be easily fitted in each other into a case which is hard to disassemble by a method wherein the lid is press-fitted in the case main body, the edge of a slot is deformed by a pawl, and the pawl is fitted in the slot. SOLUTION: A lid 12 is put on a case main body 11 and press-fitted in the case main body 11 for the formation of a case. That is, the lid 12 is press-fitted in the case main body 11 making its lower end expanded outwards by the pawls 13. The tips of the pawls 13 are made to bear against the lower end faces of slots 14 provided to the lid 12 as the upper parts of ellipses 14 are expanded by the pawls 13, so that the pawls 13 are brought into close contact with the upper parts of the slots 14 and pressed by the elastic repulsive force of the upper parts of the slots 14, and the tips of the pawls 13 catch in the side wall of the slots 14. By this setup, a fitting structure which is almost kept free from looseness can be realized without being enhanced in processing accuracy.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fitting structure for a housing (case) formed of sheet metal or the like, and more particularly to a fitting structure for fitting with a claw and a hole without using fastening parts.

[0002]

2. Description of the Related Art A case for accommodating electronic parts and the like is often composed of two members, an upper case and a lower case (a case body and a lid). For fitting, for example, a lid is provided with a claw, and the claw is used as a case. The case body is bent so as to hold it, and the case body and the lid body are fitted together, or the case body is provided with a projection and the lid body is provided with a locking hole, and these projections and the locking holes are engaged to be fitted. A structure is often used.

3A and 3B are configuration diagrams showing a conventional fitting structure by bending a claw. FIG. 3A is an exploded perspective view and FIG. 3B is a partial configuration diagram. Reference numeral 31 is a case body formed by sheet metal or the like, 32 is a lid body that fits with the case body 31 to form a case, and the case body 31 is formed to be slightly larger than the outer peripheral dimension of the lid body 32. The lid 32 has a case body 3
A plurality of claws 33 that bend so as to hold 1 are provided in a protruding manner. In addition, the case body 31 has a claw 33 of a lid 32.
A cutout hole 34 is provided for restricting the fitting position of the case main body 31 and the lid body 32.

In the case of fitting the casing constructed as described above, the case body 31 is covered with the lid body 32, and the claw 33 of the lid body 32 is inserted into the notch hole 34 of the case body 31. Then, the lid body 32 is pushed in until the lower edge portion of the lid body 32 comes into contact with the upper surface of the case body 31, and the claws 33 of the lid body 32 are bent inward so as to hold the case body 31. FIG.
It is a partial block diagram which shows the fitting structure by the conventional protrusion. Four
Reference numeral 1 is a case main body, 42 is a lid, the case main body 41 is shaped like a saucer, and a plurality of hemispherical projections are provided on the outer peripheral edge portion. A locking hole 47 is provided near the lower end of the lid 42 at a position corresponding to the protrusion 46 of the case body 41.

In the case of fitting the case constructed as described above, the case body 41 is covered with the lid body 42, and the case body 41 is inserted until the projection 46 is fitted into the locking hole 47 of the lid body 42. .

[0006]

However, in the above-described fitting structure by bending the claws (FIG. 3), the claws 33 of the lid 32 project from the lower surface of the case body 31, the bottom surface is not flat, and the case is not placed. There is a problem that it rattles and is difficult to stabilize. Further, in the fitting structure of the projection 46 and the locking hole 47 (FIG. 4), the hemispherical projection 46 is difficult to be caught, and thus it is easy to come off. However, there is a problem that it is difficult to fit because it is easily caught. An object of the present invention is to solve such a problem.

[0007]

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems and is a fitting for fixing a case body and a lid body in a case including a case body and a lid body covering the case body. In the structure, a claw portion that is cut and raised toward the outside of the case body and integrally formed, and a position corresponding to a tip end portion of the claw portion of the lid body, and the width is longer than the width of the claw portion. A long hole having a length shorter than the length of the claw portion, and by pressing the lid body into the case main body, the claw portion deforms an edge portion of the long hole, and the claw portion and the It is characterized in that it is fitted with a long hole.

[0008]

According to the above-mentioned means, the case main body is provided with the claw portion which is cut and raised outward, and the position corresponding to the claw portion of the lid is longer than the width of the claw portion. An elongated hole shorter than the length of the part is provided. Then, when the lid is press-fitted into the case main body until the claw portion fits into the long hole, the edge portion of the long hole is deformed (expanded) by the claw portion, and the elasticity of the edge portion causes the claw portion to be deformed. Since the tip portion is pushed so as to come into contact with the lower surface of the long hole, the case body and the lid body are easily fitted and are fitted so as not to come off easily.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an exploded perspective view showing a fitting structure according to a first embodiment of the present invention, and FIG. 2 is a partial configuration diagram showing a fitted state of the fitting structure. As shown in FIG. 1, reference numeral 11 denotes a case body formed by pressing a sheet metal or the like. 1
Reference numeral 2 denotes a lid body formed by pressing a sheet metal or the like, or formed by an injection molding method using a resin material. Then, the cover body 12 is fitted so as to cover the case body 11 to form a case for housing electronic components and the like. The side surface of the case body 11 is provided with a plurality of claws 13 that are formed by cutting in a substantially U shape and projecting toward the outside and having a tip end facing downward. A long hole 14 that engages with the claw 13 when the case is fitted is provided at a position corresponding to the tip of the claw 13 of the lid body 12. The width A of the elongated hole 14 is wider than the width B of the claw 13 and the height C is shorter than the length D of the claw 13. Further, the material, plate thickness and the like of the claw 13 are set so that the peripheral portion of the elongated hole 14 is deformed when it is pressed against the peripheral portion of the elongated hole 14.

The case having the above-mentioned structure is fitted by covering the case body 11 with the cover 12 and press-fitting the cover 12. That is, by this press-fitting, the lower end portion of the lid body 12 is press-fitted while being expanded outward by the claws 13 of the case body 11, and the state shown in FIG. 2 is obtained. And
With the claw 13 of the case body 11 pushing the upper part of the long hole 14 of the lid 12 (expanding), the claw 1
Since the tip portion of 3 abuts on the lower end surface of the long hole 14, the long hole 1
4 and the claw 13 are in close contact with each other, and the claw 13 is pushed by the elastic repulsive force of the upper band of the elongated hole 14, so that the tip end of the claw 13 is caught by the side wall of the elongated hole 14. The fitting force between the case body 11 and the lid 12 can be adjusted by the width A or height C of the elongated hole 14, the plate thickness of the lid 12, or the like.

As described above, in this embodiment, the case body 1
Since the claw 13 of No. 1 is caught by the side wall of the elongated hole 14 while being pressed against the upper part of the elongated hole 14 of the lid 12, the claw 13 and the upper part of the elongated hole 14 are in close contact with each other. Since it is in the state, it is possible to realize a fitting structure that suppresses rattling without increasing the processing accuracy.

[0012]

As described above in detail, in the fitting structure according to the present invention, the lid is press-fitted until the claw portion fits into the long hole, so that the edge portion of the long hole is formed by the claw portion. It is deformed and pushed by the elasticity of the edge so that the tip of the claw comes into contact with the lower surface of the elongated hole and is fitted. Therefore, it is possible to fit the case body and the lid body easily and easily without using a fastening component.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing a fitting structure according to a first embodiment of the present invention.

FIG. 2 is a partial configuration diagram showing a fitted state of the fitting structure according to the first embodiment.

FIG. 3 is a configuration diagram showing a conventional fitting structure by claw bending.

FIG. 4 is a partial configuration diagram showing a conventional fitting structure using protrusions.

[Explanation of symbols]

 11 ... Case body 12 ... Lid 13 ... Claw 14 ...

Claims (1)

[Claims] 1. A fitting structure for fixing the case body and the lid body in a case including a case body and a lid body covering the case body, wherein the case body is cut and raised outward to be integrally formed. And a long hole having a width longer than the width of the claw and a length shorter than the length of the claw formed at a position corresponding to the tip of the claw of the lid. The fitting is characterized in that the lid body is press-fitted into the case main body to deform the edge portion of the elongated hole by the claw portion to fit the claw portion and the elongated hole. Combined structure.