JPH025581Y2 - - Google Patents

Description

[Detailed description of the invention] A. Field of industrial application The present invention relates to a chassis base in which a frame is formed from a single sheet of material by punching and bending.
In particular, the present invention relates to a chassis base in which a shielding partition plate is formed within a frame for internally shielding and partitioning electric circuits built into the same frame.

B. Prior Art Conventionally, flat chassis bases have been used as chassis bases for assembling electrical component wiring bodies constituting tuner circuits, etc., in order to avoid waste of base material and simplify processing. After punching, a rectangular frame is formed by bending (Japanese Utility Model Publication No. 1985-85730)
There is. An example of such a chassis base is shown in No. 6.
As shown in the figures and FIG. 7, 2 is a pattern for punching out a flat chassis base from a base material plate. Each pattern 2 includes two opposing end plates 2a, 2a and two opposing side plates 2b, 2b.
are arranged, and by punching out these four pieces together and bending them into a frame shape, a chassis base 3 having a rectangular frame body is formed as shown in FIG. In addition to the chassis base 3 mentioned above, there is also a chassis base 3 with a flange for reinforcing the rectangular frame (Japanese Utility Model Publication No. 54-26308), an example of which is shown in FIGS. 8 and 9.
is a pattern for punching out a flat chassis base from a base material plate. For each pattern 5,
A rectangular reinforcing flange 5a, side plates 5b and 5c connected to the flange on each side of the reinforcing flange 5a,
and a mounting flange 5d on the side plate 5b are arranged.If these are punched out in one piece and then bent into a frame shape, and the mounting flange 5d is further bent, the result will be as shown in FIG. A chassis base 6 having a rectangular frame body is formed.

C. Purpose of the invention If it is necessary to internally partition an electric circuit built into a chassis base, such as a modulator circuit with an RF switch on the same chassis base, a shielding partition plate must be provided within the chassis base. The purpose of the present invention is to provide a chassis base with a rectangular frame formed by punching and bending a metal sheet plate, by integrally forming a shielding partition plate within the frame.
To provide a chassis base in which electric circuits requiring shielding can be incorporated into the same frame.

D. Structure of the invention The present invention is a chassis base in which a rectangular frame is bent with four side plates having two opposing sides, a rectangular flange on a material plate, a side plate connected to the flange on each side of the flange, S-shaped shield partition plates with partition plates alternately provided across opposite sides of the flange are punched out in a pattern, and then each side plate and shield partition plate are bent and formed into multiple chambers. By forming a rectangular frame partitioned into two parts, different electrical component wiring bodies can be assembled into the same chassis base.

E. Embodiment An embodiment of the present invention will be described below with reference to FIGS. 1 and 2. Reference numeral 7 in FIG. 1 indicates the shape of a pattern placed on a single material plate to form the chassis base according to the present invention. In pattern 7, 7a is a rectangular reinforcing flange;
7b and 7c are side plates connected to the flange 7a on each side of the reinforcing flange 7a, and 7d is a shielding plate in which partition plates 7d' and 7d'' are alternately arranged in an S-shape across opposite sides of the flange 7a. The reinforcing flange 7a, side plates 7b, 7c, and shielding partition plate 7d are punched out in one piece according to pattern 7, and then each side plate 7b, 7c and the partition plate 7 are punched out.
By bending d' and 7d'', a chassis base 8 having a rectangular frame provided with a shielding partition plate 7d is formed as shown in FIG.

Here, the shielding partition plate 7d needs to be provided without any gap between the bent side plates 7b, 7b. Therefore, when the partition plates 7d' and 7d'' are bent, a notch 7a' is formed in a portion that should originally be a part of the reinforcing flange 7a, as shown in FIG.
Therefore, this notch 7a' is 2 made by the partition plate 7d.
It has the following advantages: That is, the reinforcing flange 7a with the notch 7a' can be obtained by bending one partition plate 9b as shown in the pattern 9 shown in FIG. Notch 9
Compared to the case where a' is uneven, the chassis base 8 can be reinforced evenly.

Furthermore, although the shields formed by the partition plates 7d shown in Fig. 1 are at different levels, the projected areas of the shields overlap by extending the partition plates 7d' and 7d'' arranged in an S-shape as shown in Fig. 5. Forming the portion w improves the shielding effect, and providing the portion w across the side plates forms a shield space and further improves the shielding effect.

F. Effects of the invention According to the invention, a rectangular reinforcing flange and a shielding partition plate formed in an S shape extending between the side plates and opposite sides of the flange are arranged on a material plate in a pattern that integrates them. After punching, a chassis base of a rectangular frame divided by partition plates was formed by bending, so that electric circuits incorporated in the same frame could be internally divided into shield sections. Furthermore, since the shielding partition plate is formed in an S-shape on the pattern, the reinforcing flanges are uniform on both sides of the shielding partition plate, and the reinforcement strength can be maintained.
Further, the shielding effect can be improved by extending each of the two partition plates forming the S-shape of the shield partition plate and taking a portion where the projected area of the shield overlaps.

[Brief explanation of the drawing]

Fig. 1 is a developed view of one embodiment of the chassis base according to the present invention, Fig. 2 is a perspective view of the chassis base, and Fig. 3 is a chassis base in which the reinforcement by the rectangular reinforcing flange is uneven due to the partition plate. FIG. 4 is a perspective view of the chassis base, FIG. 5 is a plan view of a chassis base in which the shielding effect of the shielding partition plate is improved in an embodiment of the chassis base according to the present invention, and FIG. FIG. 7 is a perspective view of the chassis base, and FIG. 8 is a plan view of the conventional chassis base pattern arranged.
9 is a plan view of a conventional chassis base pattern with reinforcing flanges disposed on a material plate, and FIG. 9 is a perspective view of the chassis base. 7a...Flange, 7b, 7c...Side plate, 7d
...S-shaped partition plate, 7d', 7d''...partition plate.

Claims (1)

[Scope of utility model registration request] In a chassis base in which the frame is bent using four side plates with two opposing sides, this is a pattern in which side plates connected to a flange and partition plates alternately provided across the opposite side of the flange are arranged on a material plate. A chassis base characterized by punching out a single piece and then bending each side plate and partition plate to form a plurality of compartments.