JP3303516B2 - Frame structure of high frequency equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a frame structure of a high-frequency device such as an electronic tuner of a television receiver, and more particularly, to a circuit structure surrounding an outer periphery of a circuit board on which electronic components are mounted. The present invention relates to a frame structure for partitioning and shielding each circuit block of a substrate.

[0002]

2. Description of the Related Art Conventionally, for example, in a high-frequency device such as an electronic tuner, a metal for shielding surrounds an outer periphery of a side surface of a circuit board on which electronic components are mounted and separates each circuit block on the circuit board. The frame is attached by soldering.

FIG. 5 is a perspective view of such a frame.
A plurality of, in this example, seven shield plates 2a _{0 to} 2d ₀ for shielding each circuit block on the circuit board are provided in a rectangular frame 1 surrounding the outer periphery of the side surface of a circuit board (not shown) on which electronic components are mounted. , 2e to 2g are provided to partition each circuit block. In recent years, such shield plates 2a _{0 to} 2d ₀ , 2e to 2g
Are often integrated, that is, formed from a single plate, in order to reduce material costs and reduce the number of assembly steps.

For example, as shown in FIG. 6, when a case is considered in which four shield plates 2a _{0 to} 2d ₀ are integrally mounted on the frame 1, a shield plate 2a
_As physical conditions for integrating ₀ to 2d ₀ , adjacent shield plates, for example, shield plates 2a ₀ ,
2b ₀ is the distance between the shield plates 2a ₀ to 2a
It must be greater than the height h of d ₀ , 2e to 2g.

That is, the shield plates 2a ₀ , 2b ₀
The distance l between the shield plates 2a _{0 to} 2d ₀ , 2e
When the height is smaller than the height h of 2 g, for example, as shown in a development view of FIG. 7, the shield plate 2 a ₀ and the shield plate 2 b ₀ interfere with each other, that is, overlap with each other, that is, a desired shape. Shield plate 2a ₀
It is impossible to obtain a ~2d _0. In this case, the shield plate 2a _0, as the Figure 7 but configurations are contemplated to be bent from the opposite direction, shown in the exploded view of FIG. 8, in turn,
A shield plate 2a ₀ and the shield plate 2c ₀ would interfere with each other.

For this reason, conventionally, when integrating shield plates, the most economical combination is considered as a design procedure in consideration of the above-described conditions, and shield plates for which interference cannot be avoided are integrated. It had to be a separate piece without conversion.

[0007]

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and has been made to integrate a shield plate, which has been forced to be a separate piece due to interference, thereby reducing material costs. It is intended to reduce the number of assembly steps and the number of assembly steps.

[0008]

In order to achieve the above-mentioned object, the present invention is configured as follows.

That is, according to the present invention, a plurality of shield plates in a developed state integrated via a connecting portion are bent and attached to a frame, respectively, so as to divide a space in the frame. The frame structure of the device, wherein the plurality of shield plates are in a deployed state.
So they do not overlap the physician each other, the required shielding plate, together with the cutout portion is formed, the shielding section to completely shield the cutout portion is formed by being bent.

[0010]

According to the present invention having the above structure, the required shield plate of the plurality of integrated shield plates includes:
Notches are formed so that they do not overlap in the unfolded state, and a shielding part that completely covers the notches by being bent is formed. The shield plate, which has been a separate piece, can also be integrated, and the notch is shielded by the shield, so that the shielding performance between circuit blocks defined by the shield plate does not decrease.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a perspective view of one embodiment of the present invention, and portions corresponding to the conventional example of FIGS. 5 to 8 are denoted by the same reference numerals.

The frame structure of the high-frequency device of this embodiment has a plurality of frames for shielding each circuit block on the circuit board in a rectangular frame 1 surrounding the outer periphery of the side surface of a circuit board (not shown) on which electronic components are mounted. , In this example 7
One shield plate 2a to 2g is provided and configured to partition each circuit block.

In this embodiment, in order to reduce the material cost and the number of assembling steps, as in the above-mentioned conventional example,
The four shield plates 2a to 2d are integrated. FIG. 2 is a development view of the four shield plates 2a to 2d integrated. The shield plate 2a and the shield plate 2d are continuous via the connecting portion 3, the shield plate 2b and the shield plate 2d are continuous via the pair of connecting portions 4, and further, the shield plate 2c The shield plate 2d is continuous through a pair of connecting portions 5.

In this embodiment, in order to enable integration of the four shield plates 2a to 2d, a rectangular cutout 6 is formed in the shield plate 2a so as not to overlap with the shield plate 2b. At the same time, a shielding portion 7 for shielding the notch 6 to complete the shield
Are formed.

The shielding portion 7 is formed in a rectangular shape having an area larger than that of the notch portion 6 and is continuous with the shield plate 2a via the connecting portion 8. This connecting part 8
The boundary between the shield plate 2a and the shield plate 2a is bent by 180 degrees, so that the shielding portion 7 covers the notch portion 6 and can be completely shielded.

In this embodiment, the shielding portion 7 and the connecting portion 8
Is formed on the side of the shield plate 2a opposite to the side on which the cutout 6 is formed. Therefore, the overall material area required to form the four shield plates 2a to 2d is Even if the connecting portion 8 is formed, there is no need to increase it.

The four shield plates 2a to 2d having the above configuration are bent as described below to obtain the state shown in FIG.

That is, in the unfolded state of FIG. 2, the shield plate 2d is bent at 90 degrees at the boundary between the connection portions 3, 4, and 5, and the shield plate 2b and the shield plate 2c are connected to the connection portions 4 and 4. 5 and bent at 90 degrees at the boundary with the shield plate 2d to face the shield plate 2d. Further, the shield plate 2a is bent at 90 degrees at the boundary portion with the connecting portion 8 to be perpendicular to the shield plate 2d, and the connecting portion 8 with the shielding portion 7 is turned at 180 degrees at the boundary portion with the shield plate 2a. By bending and covering the notch 6 with the shielding part 7, the state shown in FIG. 3 is obtained.

By mounting the shield plates 2a to 2d in the state shown in FIG. 3 in the frame 1 provided with the shield plates 2e to 2g, the frame shown in FIG. 1 is formed. .

As described above, the four shield plates 2a to 2d, which could not be integrated because of the overlapping portions, can be integrated by forming the cutout 6 and the shield 7. In addition, material costs and assembly man-hours can be reduced as compared with the conventional example in which separate pieces are required.

Although the shielding portion 7 and the connecting portion 8 are partially overlapped with the shield plate 2a, the thickness of the shielding portion 7 and the connecting portion 8 is increased only partially by the thickness of the shielding plate 2a, but the dead space of the circuit board is slightly increased. Only a degree.

In the above-described embodiment, the shielding portion 7 is
Although it is formed on the side opposite to the side where is formed, as another embodiment of the present invention, as shown in FIG. 4, it may be formed on the side adjacent to the side where the notch 6 is formed.

In the above-described embodiment, four shield plates are integrated, but more shield plates may be integrated, and the shape of the cutout is not limited to a rectangle.

[0025]

As described above, according to the present invention, notches are formed and bent in a required shield plate of a plurality of shield plates to be integrated so that they do not overlap in a developed state. To complete the notch
Since the shielding part for completely shielding is formed, the shield plate, which was conventionally a separate piece for overlapping, can also be integrated, thereby reducing material costs and assembling man-hours. In addition, since the cutout portion is completely shielded by the shielding portion, the shielding performance does not decrease.

[Brief description of the drawings]

FIG. 1 is a perspective view of one embodiment of the present invention.

FIG. 2 is a development view of the shield plate of the embodiment of FIG.

FIG. 3 is a perspective view showing a state where the shield plate of FIG. 2 is bent.

FIG. 4 is a development view of a shield plate according to another embodiment of the present invention.

FIG. 5 is a perspective view of a conventional example.

FIG. 6 is a perspective view for explaining integration of a shield plate of a conventional example.

FIG. 7 is a development view of a shield plate for explaining a problem of the conventional example.

FIG. 8 is a development view of a shield plate for explaining a problem of the conventional example.

[Explanation of symbols]

1 framework 2a~2g, 2a ₀ ~2d ₀ shielding plate 3,4,5,8 connecting portion 6 notch 7 shielding portion

Claims (1)

(57) [Claims] 1. A frame structure of a high-frequency device for dividing a space in a frame frame by bending a plurality of shield plates, which are integrated via a connecting portion, and attaching the shield plate to the frame frame. a is, as the plurality of shield plates between the deployment condition does not overlap the physician each other, the required shielding plate, together with the cutout portion is formed, completely the notch by being bent A frame structure for a high-frequency device, wherein a shielding portion for shielding is formed.