JP2577937B2 - Electronic device housing - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a housing of an electronic device used for a package component such as an electronic tuner and a converter used in a television and a video tape recorder.

(Prior Art) In recent years, prices of home electric appliances have been steadily decreasing, and there is a strong demand for cost reduction for electronic tuners and converters, which are components of televisions and video. In order to reduce costs, it is necessary to rationalize materials and the like, reduce the number of assembly steps, and reduce capital investment costs.

A case of a conventional electronic device will be described with reference to FIGS. 3 and 4. FIG. FIG. 3 is an enlarged perspective view of a main part of the first conventional example. A casing is formed by punching a single metal plate into a predetermined shape and then bending the box. As shown in the figure, the end portions of the side plate 2 and the side plate 3 connected by a sector 1 having an opening angle of 90 ° formed as a joint are formed with concave and convex to engage with each other, and are combined when box bending is completed.

4 (a) and 4 (b) show a second conventional example, as shown in FIG. 4 (a).
After the projection 3b containing the 3a is inserted into the engagement hole 2a of the side plate 2 at the time of bending the box, the projection 3b is opened and fixed on both sides by the caulking tool 4, as shown in FIG. 4 (b). Structure.

(Problems to be Solved by the Invention) However, in the structure of FIG. 3, when the length of the sector 1 is short or the thickness of the metal plate is thin, the shape retention after box bending is poor, and However, there is a problem that the opening is easily spread. In the structure shown in FIG. 4, the opening can be assembled with high dimensional accuracy by caulking the projection 3b inserted into the engagement hole 2a of the side plate 2, but the mold for molding is slid up and down. On the other hand, in order to caulk the projection 3b of the side plate 3, it is necessary to move the caulking tool horizontally, and since the vertical movement is converted into horizontal movement by a cam or the like, the mold becomes complicated, and therefore, it is expensive. There was a problem of becoming.

The present invention solves the above-described problems, and provides a housing of an electronic device that can securely and accurately fix a joint with a mold having a simple structure.

(Means for Solving the Problems) In order to solve the above problems, the present invention includes a sector-shaped joint provided from one metal plate and a plurality of side plates connected by the joint, In a housing of an electronic device, a pair of the side plates adjacent via the joint portion are bent downward with respect to the joint portion so as to be substantially orthogonal to each other to form a frame body whose lower surface and upper surface are open, One side plate adjacent via the joint portion is provided with a concave notch having an inclined portion that opens at the lower end and expands outward, and the other side plate is in contact with the one side plate. When the one and the other side plates are bent so as to be substantially orthogonal to each other, an engagement protrusion is provided to fit into the notch, and the engagement protrusion is provided to fit into the notch. The engaged projections Are fixed by caulking by pressing upward from below.

(Operation) According to the above configuration, one of the side plates adjacent to each other via the joint portion is provided with a concave notch having an inclined portion that opens at the lower end thereof and expands toward the outer end. The side plate protrudes from the side end in contact with one side plate longer than the thickness of the metal plate, and engages with the notch when one and the other side plate are bent so as to be substantially orthogonal to each other. When fixing the one side plate and the other side plate by fixing the one side plate and the other side plate by providing the mating protrusion and pressing the engagement protrusion fitted in the notch upward from below, the upper and lower It is possible to caulk and fix the engagement protrusion fitted into the notch only by moving in the direction and fix one side plate and the other side plate, so that the mold for assembling the housing has a simple configuration. can do.
Furthermore, the inclined portion in the notch facilitates fitting of the engaging protrusion into the notch, and also, when caulking the engaging protrusion fitted into the notch, the engaging protrusion is guided to the bottom of the notch. Thus, it is possible to reliably and accurately fix one side plate and the other side plate.

(Embodiment) An embodiment of the present invention will be described with reference to FIG. 1 and FIG.

FIG. 1 is a perspective view showing a joint of a housing of an electronic device according to the present invention and the movement of a caulking tool, and FIGS. 2 (a) and (b) are enlarged side views of main parts thereof.

As shown in FIG. 2 (a), an engagement projection 3c provided at one end of the side plate 3 in contact with the side plate 2 is positioned below the sector 1 so that the side plates 2, 3 are substantially orthogonal to each other. Notch 2b opened at the lower end of side plate 2 by being bent
After the fitting, the engaging projection 3c is deformed as shown in FIG. 1 by caulking from below with the caulking tool 5, and the side plates 2, 3 are fixed.

At this time, as shown in FIG. 2A, the size of the opening can be determined by strictly setting the position and width of the notch 2b.

In addition, as shown in FIG. 2 (b), if the inclined portion 2c is provided outside the notch 2b outside the notch 2b, it is easy to assemble and it is possible to obtain a product having good dimensional accuracy.

(Effects of the Invention) As described above, according to the present invention, the engagement protrusion fitted into the notch is fixed by caulking by pressing it upward from below, so that one side plate and the other side plate are fixed. When fixing the crimping tool, only the vertical movement of the crimping tool caulks the engagement protrusion fitted into the notch, and it is possible to fix one side plate and the other side plate. Mold can be simple configuration,
Further, the inclined portion in the notch facilitates fitting of the engagement protrusion into the notch, and when caulking the engagement protrusion fitted into the notch, the engagement protrusion is guided to the bottom of the notch, The one side plate and the other side plate can be accurately and reliably fixed. As a result, it is possible to rationalize the materials and the like, reduce the number of assembly steps, reduce the capital investment, and reduce the cost of the housing of the electronic device.

[Brief description of the drawings]

FIGS. 1 and 2 (a) and (b) are perspective views showing a box-bending joint of a housing according to the present invention and an enlarged side view of a main part thereof, and FIGS. 3 and 4 are first and second views, respectively. 4 (a) and 4 (b) are perspective views showing states before and after a caulking step, respectively. 1 ... sector, 2, 3 ... side plate, 2a ... engagement hole, 2b ... notch, 2c ... ... inclined portion, 3a ... slit, 3b ... projection, 3c
…… engaging protrusions, 4,5 …… a caulking tool.

Claims (1)

(57) [Claims] 1. A fan-shaped joint provided from one metal plate and a plurality of side plates connected by the joint, a pair of side plates adjacent to each other via the joint are substantially orthogonal to each other. As described above, in a housing of an electronic device which is bent downward with respect to the joint portion to form a frame body whose lower surface and upper surface are open, the lower end of one side plate adjacent via the joint portion has an opening. And a concave notch having a sloping portion extending outwardly is provided, and the other side plate is protruded from a side end in contact with the one side plate longer than the plate thickness of the metal plate. When the other side plate is bent so as to be substantially orthogonal to each other, an engaging projection fitted to the notch is provided, and the engaging projection fitted to the notch is swaged by being pressed upward from below. What you did A housing of an electronic device to be a butterfly.