JP4197985B2 - Electronic equipment housing - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention improves the immunity of the electronic components housed in the block and improves the heat dissipation efficiency in an electronic device housing in which an electronic circuit is built in a plurality of independent blocks in a case body housed in the housing. The present invention relates to an electronic device casing.
[0002]
[Prior art]
In a conventional electronic device casing, a high-frequency unit containing an amplifier circuit, a frequency conversion circuit, and the like is housed in a case body in an inner case formed of a shield-structured metal material. This high-frequency unit is attached to the inside of the back wall of the case with attachment screws or the like. In this method, the inner case is a printed circuit board, a method in which the printed circuit board is covered from the front surface and fixed to the bottom surface of the main body case (for example, see Patent Document 1),
For the inner case, there is a method in which a high-frequency unit having a lid formed of a metal material on the back side (ground side) of the printed board is fixed to the bottom surface of the main body case. (For example, see Patent Document 2)
[0003]
[Patent Document 1]
Japanese Patent Laid-Open No. 2001-111273 [Patent Document 2]
JP-A-7-288389 [0004]
[Problems to be solved by the invention]
However, such high-frequency devices are required to be small, light, and easy to install, and it has become necessary to widen the transmission frequency band like high-frequency devices typified by television receivers. For example, when the conventional VHF and UHF broadcasts to BS · 110 ° CS digital broadcasts are to be drawn into a house with a single coaxial cable, it is necessary to transmit or amplify the frequency band of 70 to 2600 MHz. Furthermore, the BS / 110 ° CS digital broadcast and the terrestrial digital broadcast using the newly started UHF band have a problem that a received video is disturbed if there is an interference wave because the modulation method is digital. Therefore, it is necessary to improve the immunity of the shield case attached to the case body of the electronic device casing.
However, when a high frequency unit is attached to the case body as in the case of a conventional electronic device casing, as shown in Reference 1, the method of shielding with the inner case with the bottom side of the case body opened is the case where the inner case is shielded. There is a problem that the shielding property between the case body and the inner case is not good because the place where the locking part for fixing to the bottom surface of the body is provided is limited.
Furthermore, in the method of fixing the inner case shielded on both the front side and the back side of the printed circuit board as shown in Reference Document 2 to the case body made of aluminum die cast or the like, the inner case is attached to the bottom surface of the case body. In order to fix the inner side, it is necessary to provide a fixing part or the like using the outer peripheral surface of the inner case. Such a fixing portion is generally formed integrally with the inner case, and as a result, several holes are formed in the inner case, which causes a problem that the shielding performance deteriorates.
Also, when an electronic device casing is made in the example shown in Reference 1, the space provided between the printed circuit board and the bottom surface of the case body is large, so that the heat generated from the electronic components mounted on the printed circuit board can be reduced. Although the heat dissipation effect was great, there was also a problem that the external dimensions of the electronic equipment casing were large.
Therefore, the present invention has been made to solve the above-mentioned problems of the prior art,
The purpose is to provide an electronic equipment housing that can be used both outdoors and indoors.
Another object is to provide an electronic device housing that can be used both outdoors and indoors and has good immunity.
Another purpose is to use both outdoor and indoor equipment, which consists of a case body that consists of a plurality of independent blocks, each block is shielded and incorporated, and a cover that houses the case body. It is to provide a possible electronic device casing.
Another object is that the electronic circuit is composed of a plurality of independent blocks, each of which includes a case body that is shielded and incorporated, and a cover that houses the case body, and a space between the case body and the block. It is to provide an electronic device housing that can be used both outdoors and indoors.
Another object is to provide an electronic device housing that can be used both outdoors and indoors, is small and has a good heat dissipation effect.
[0005]
[Means for Solving the Problems]
In order to solve the above problems, the invention of claim 1 is a case main body in which an electronic circuit of a signal processing device is constituted by a plurality of independent blocks and each block is shielded, and a cover for housing the case main body. When the mounting surface of the electronic device casing is a bottom surface, a plurality of connection terminals are laid on one side of the case body, and each of the blocks is connected to the case body. While being locked by the locking means, a space is provided between the bottom surface, the top surface, and the side surface other than the one side surface of the case body except for the locking means portion.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an example of an embodiment embodying the present invention will be described in detail with reference to the drawings.
FIG. 1 is an exploded perspective view showing the arrangement of a case main body and an electronic circuit block housed in the case main body constituting the electronic device casing of the present invention, with the mounting surface as the bottom surface. FIG. 2 is a top view of the case main body containing the electronic circuit block, and is a partially broken view. FIG. 3 is an enlarged detail view of a broken portion in FIG. 4A and 4B are external views of the electronic device casing of the present invention, in which FIG. 4A is a top view and FIG. 4B is a side view. 5 is a partial cross-sectional view taken along line AA of FIG.
[0007]
In FIG. 1, 51 is a case main body, and the mounting surface is displayed as a bottom surface. The case body 51 is formed in a box shape as shown in the figure by a metal material, and the input terminal 2, the power supply terminal 4, and the output terminal 3 are laid on the front surface 51a side.
Reference numerals 60, 61, and 62 denote high-frequency units that house electronic circuits, and the high-frequency units are fixed to the side surfaces 51b and 51b with screws 54, 54.
Reference numeral 70 denotes a printed circuit board on which an electronic circuit is formed, and 17c and 30 denote a part of electronic components. The printed circuit board 70 is fixed to the fixing portions 56, 56... Of the case body 51 with screws 70a, 70a. The central conductors of the connection terminals 2, 4 and 3 are connected to the signal line of the printed circuit board.
Reference numeral 52 denotes a display plate, which is fixed to the fixing portion 57 of the case body with screws 52a and 52a. At this time, on the display board 52, the operation window 52b, which is placed on the printed board, for example, at a position opposed to the operation unit of the variable attenuator 17c, which is an adjustment unit of the gain adjustment circuit, and the operation unit such as the switch 30. 52c is formed so that adjustment and switching can be freely performed from the operation windows 52b and 52c.
[0008]
As shown in FIGS. 4 and 5, the case main body 51 in which the high-frequency unit and the like are housed in this way is housed in the housing 50 and fixed with screws 50b, 50b. When the mounting surface 50a is the bottom surface, the housing 50 is formed in a box shape with a metal material in which a part of the front surface side and the upper surface side of the housing 50 is opened. That is, when the case main body 51 is housed, the front surface 51a on which the connection terminals 2, 4, and 3 are laid and the display plate 52 are exposed at the open portion. Further, a lid 53 hinged to the casing 50 so as to be openable and closable is provided at a position opposed to the display plate 52, so that the work can be easily performed at the time of attachment work or adjustment after attachment. In addition, the electronic device casing 1 is configured to have a drip-proof and dust-proof structure when the work is completed.
[0009]
Next, storage of the high-frequency unit in the case main body 51 will be described with reference to FIGS. Three high-frequency units are accommodated in the embodiment of the present invention. The high frequency unit may be, for example, a tuner unit, a modulation unit, a signal processing unit, or any other configuration. Further, in this description and the drawings, detailed description of the connection between the high frequency units is omitted.
First, the high frequency units 62 and 61 and the case main body are fixed to the locking means 65 with screws 54, 54. Further, the high frequency unit 60 is fixed to the upper side of the high frequency unit 61.
[0010]
Details of the locking means 65 will be described. The locking means 65 includes a locking portion 65a of the case body 51 and a locking portion 65b of the high frequency unit. The locking portion 65a is formed on the side surface 51b of the case body 51 according to the storage state of the high-frequency unit. Further, a locking portion 65b is formed on the outer peripheral portion of the high-frequency unit at a position opposed to the locking portion 65a formed on the side surface 51b of the case body.
The locking portion 65a is formed with a concave portion 67 having a through hole 66 at substantially the center. The fixing screw 54 is inserted into the through hole 66, but the recess 67 has a size such that the screw head does not protrude outward from the side surface 51b when the fixing screw 54 is attached to the through hole 66. Is formed.
The locking portion 65b is formed with a convex portion 64 having a screw hole 63 formed with a female screw in a substantially central portion. The high frequency units 60 and 61 are attached to the case body 51 with the screw hole 63 and the fixing screw 54. 62 are accommodated. FIG. 2 shows a drawing when tightening with a tool such as a screwdriver 69. Reference numeral 60a denotes a printed circuit board on which an electronic circuit housed in the high frequency unit 60 is formed.
[0011]
After the high-frequency unit is stored in this way, the printed circuit board 70 is installed next. This printed circuit board is configured to control the above high-frequency unit and send / receive signals to / from the outside via the connection terminals 2, 4 and 3. The entire printed circuit board is made of a metal material as required. Shielding may be performed with a formed case, or a shielding case may be provided only on a necessary part of the shielding.
This printed circuit board 70 is fixed to the fixing portions 56, 56... With fixing screws 70a, 70a.
[0012]
Next, a display board 52 formed of a resin material or the like is fixed to the upper part of the printed board. The display board 52 is provided with operation windows 52b and 52c at positions opposed to operation parts such as the variable attenuator 17c and the switch 30 provided on the printed circuit board 70. In the vicinity of the operation windows 52b and 52c, explanations relating to adjustment and switching are described.
[0013]
FIG. 5 shows a partially broken cross-sectional view of the case body 51 assembled in this way, taken along line AA in FIG. In the present invention, the electronic circuit is composed of independent blocks 60, 61, 62, and a case main body 51 in which the respective blocks are shielded and incorporated, and a casing 50 for housing the case main body 51, are included in the electronic equipment casing. The body 1 is constituted. When the mounting surface of the casing 50 is the bottom surface 50a, the connection terminal of the input terminal 2, the power supply terminal 4, and the output terminal 3 is laid on the front surface 51a side of the case body 51, and the front surface 51a Adjustment means that can control and switch the high-frequency unit toward the upper surface of the case main body 51, and connection terminals to the outside are arranged together and are further connected. In the electronic device housing 1 in which the lid 53 is provided so as to cover the connection terminal and the adjusting means for easy waterproofing, drip-proofing and dust-proofing after installation. Each block 60, 61, 62 is locked by the case body 51 and the locking means 65, and except for the locking means portion 65, the bottom surface, the top surface, and the one side surface 5 of the case main body 51. It is configured to are allowed provided the space between the side surface other than a.
[0014]
As shown in FIGS. 2, 3, and 5, the dimensions of the space between the high-frequency units 60, 61, 62 and the case main body 51 are W1, W2, W3, and W4 except for the locking means. Has been.
This space is a space provided between the printed circuit board housed in each high-frequency unit and the side and bottom surfaces of the case body, and has a heat dissipation effect for heat generated from electronic components mounted on the printed circuit board. It is also for money.
Furthermore, the structure of the high-frequency unit is such that mounting is not hindered even if there are protrusions on the surface.
W1, W2, W3, and W4 may have the same length, or may be arranged to have different lengths.
[0015]
The convex portion 64 of the locking portion 65b formed on the side surface of the high-frequency unit and the concave portion 67 of the locking portion 65a formed on the case body are configured to contact each other and are tightened with screws 54, The convex part 64 and the concave part 67 are closely fixed on the surface. As a result, the high-frequency units 60, 61, 62 are fixed to the case body 51 without impairing the shielding performance.
The shapes of the convex portions 64 and the concave portions 67 are not limited to the embodiments of the present invention. Further, a knurl may be formed on the outer surface side of the convex portion 64 and the inner surface side of the concave portion 67 so as to improve the shielding performance against high frequency signals.
[0016]
【The invention's effect】
As described above in detail, according to the first aspect of the present invention, the electronic circuit is constituted by a plurality of independent blocks, each of the blocks being shielded and incorporated, and the cover for housing the case body. When the mounting surface of the electronic device casing is a bottom surface, a plurality of connection terminals are laid on one side of the case body, and each block is engaged with the case body. Since there is a space between the bottom surface of the case body, the top surface, and the side surface other than the one side surface except for the locking means portion, each block, that is, the amplification unit, the modulation unit, and the signal processing is provided. Electronic device casing with good immunity, because the outer peripheral surface of the high-frequency unit such as a part is not closely formed with a through hole through which high-frequency signals leak, but is tightly fixed via the case body and the locking means It can be provided. In addition, since the arrangement has a space between the side surface and bottom surface of the case main body and the high frequency unit, a space is eventually formed between the high frequency unit and the case main body, and is attached to the printed circuit board. It is possible to provide an electronic device casing having a casing that can be used both outdoors and indoors with high heat dissipation effect that can efficiently dissipate heat generated by electronic components.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view of a case main body constituting an electronic device housing of the present invention and an arrangement of electronic circuit blocks housed in the case main body with an attachment surface as a bottom surface.
FIG. 2 is a top view of a case body housing an electronic circuit block, with a part thereof broken away.
FIG. 3 is an enlarged detail view of a broken portion in FIG. 2;
4A and 4B are external views of the electronic device casing of the present invention, where FIG. 4A is a top view and FIG. 4B is a side view.
5 is a partial cross-sectional view taken along line AA in FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Electronic device housing, 2 ... Input terminal, 3 ... Output terminal, 4 ... Power supply terminal, 17c ... Variable attenuator, 30 ... Switch, 50 ... Housing, 50a ... Mounting surface (bottom surface), 51 ... Case body , 51a ... front face, 51b ... side face, 52 ... display board, 52a ... screw, 52b, 52c ... operation window, 53 ... lid, 54 ... screw, 56 ... fixing part, 57 ... fixing part, 60, 61, 62 ... High frequency unit 63 ... Screw hole 64 ... Protruding part 65 ... Locking means 65a ... Locking part of case main body 65b ... Locking part of high frequency unit 66 ... Through hole 67 ... Recessed part 69 ... Tool, 70 ... Printed circuit board, 70a ... Screw, W1, W2, W3, W4 ... Space.

Claims (1)

In an electronic equipment housing comprising an electronic circuit composed of a plurality of independent blocks, a case main body in which each block is shielded and incorporated, and a cover for housing the case main body.
When the mounting surface of the electronic device casing is a bottom surface, a plurality of connection terminals are laid on one side of the case body.
Each of the blocks is locked by the case body and locking means, and a space is provided between the bottom surface, the top surface, and the side surface other than the one side surface of the case body except for the locking means portion. Electronic equipment housing.

Images