JP2720379B2 - Electronic equipment case - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic device case for housing electronic circuit elements therein, and more particularly to a broadcast satellite (BS) and a communication satellite (C) received by a parabolic antenna.
The present invention relates to an outdoor-mounted electronic device case for home listening, which amplifies the signal of S), mixes the amplified signal with VHF and UHF signals separately received by an antenna, and outputs the mixed signal.

[0002]

2. Description of the Related Art An electronic equipment case of this kind is used in a home listening system shown in FIG. Then, in the conventional system for home listening, the signal received by the BS antenna 1 is input to the BS-IF / VU booster 2. Also, the signal received by VHF antenna 3 and the signal received by UHF antenna 4 are compared with UHF / VH
After input to F booster 6 and amplifying, BS-IF / V
Output to U booster 2. And BS-IF /
In the VU booster 2, the BS signal and the UHF / VH
The F signal is mixed and amplified.

[0003] With the spread of CS broadcasting, it has been proposed to incorporate a CS signal into a system for home co-listening. In that case, the signals received by the CS antennas 8 and 9 are input to the CS / BS-IF / VU mixed amplifier 12 via the CS-IF channel selector 10. The CS / BS-IF / VU mixed amplifier 12 has a BS-I
A mixed signal from the F / VU booster 2 is also input.
Output to 3. This mixed signal is divided into a plurality of parts by a distributor 13 and outputted to a terminal 14 of each home. A CS / BS-IF / VU demultiplexer 16 is connected to this terminal 14,
The demultiplexed CS / BS signal is input to a television 19 via a CS / BS tuner 17 and a coretech decoder 18. On the other hand, the separated UHF / VHF signal is
The signal is input to the television 19 via the / U splitter 21.

Although the electronic circuit elements of the UHF / VHF booster 6 and the BS-IF / VU booster 2 are housed in an electronic equipment case, the CS / BS-IF / VU mixed amplifier 12 is still in the electronic equipment case. It is not designed to house electronic circuit elements. That is, the conventional electronic device case is used as a device case for mixing and amplifying signals in the VHF band, the UHF band, and the BS band (10 to 1335 MHz), and has a CS-IF frequency band of 1335 to 1880 MHz. It was not used as an equipment case for processing the signals of

[0005]

However, as described above, with the spread of CS broadcasting, CS cases have been added to electronic equipment cases.
-It is required to house the BS-IF / VU mixed amplifier 12 and incorporate CS broadcasting into a system for home listening. However, the CS-IF frequency band includes other radio, for example, a mobile phone frequency band (1.3 GHz to
1.5GHz) and airwaves from aviation radar,
These radio waves are used as CS / BS-IF / VU
It is mixed into the mixing amplifier 12. Conversely, CS / BS
The CS-IF signal is also emitted outside from the mixed IF / VU amplifier 12 as jamming radio waves. Therefore, it is necessary to shield the electronic circuit element in the electronic device case. For this purpose, it is conceivable to form a metal film on the surface of the electronic device case to provide a shield. However, the cost increases and the shielding effect is not so good. Further, a system that does not incorporate CS broadcasting into a system for home co-listening is also required. In this case, a shield is not required.

Accordingly, an object of the present invention is to provide an electronic equipment case that can be used both when an electronic circuit element is shielded and when the electronic circuit element is not shielded.

[0007]

An electronic equipment case according to the present invention comprises a case body and a lid, and is provided with either an electronic circuit element incorporated in a shield case or an electronic circuit element mounted on a circuit board. One is housed inside.

In order to achieve the above object, a cable conductor connecting tubular portion is formed at the base of the case body so as to protrude, and the shield case is supported on the inner surface of the case body. And a circuit board supporting portion for supporting the circuit board.

A plug seat is attached to a wall of the shield case. When the shield case is housed in the case main body, the plug seat becomes a cable conductor connecting cylindrical portion of the case main body. Has been inserted. The outer diameter of the plug seat is smaller than the inner diameter of the cable conductor connecting tube, and a gap is formed between the plug seat and the cable conductor connecting tube. Further, the nut screwed into the plug seat comprises a polygonal nut portion and a cylindrical portion formed coaxially with the nut portion, and the nut screwed into the plug seat. The cylindrical portion is inserted into a gap between the plug seat and the cable conductor connecting cylindrical portion.

Further, a case-side protrusion is formed on the inner surface of the base of the case body in which the cable conductor connecting tubular portion is formed, and the case-side protrusion is a shield case to which a plug seat is attached. Is in contact with the wall. on the other hand,
A shield case side protrusion is formed on a wall of the shield case to which the plug seat is attached, and the shield case side protrusion is formed at a base of a case body at which the cable conductor connection tubular portion is formed. May be in contact with the inner surface.

The circuit board supporting portion includes a first protruding portion in contact with one surface of the circuit board and a second protruding portion in contact with the other surface of the circuit board. It is preferable that it is constituted so that it may be clamped.

Further, the inner surface of the cable conductor connecting tubular portion has a structure in which a guide body having an inclined surface is added to a cylindrical portion having a circular cross section, and the cable conductor connecting portion is formed by the inclined surface of the guide body. In some cases, the internal space of the tube portion becomes narrower from the outside to the inside of the case body.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of an electronic equipment case according to the present invention will be described with reference to FIGS. FIG. 1 is a side view showing a state in which an electronic device case according to a first embodiment of the present invention is attached to a mast. FIG. 2 is a sectional view of a case body of the electronic device case. FIG. 3 is a front view of FIG. FIG. 4 is a view for explaining a state where the shield case is being stored in the case body. FIG. 5 is a view for explaining a state where the shield case is stored in the case body. FIG. 6 is a cross-sectional view of the electronic device case in a state where the shield case is stored. FIG. 7 is a cross-sectional view showing a state where the circuit board is housed in the case main body.

In FIG. 1, a television receiving device case 31 as an electronic device case is made of synthetic resin,
2 and a lid 33. The lid 33 is attached to the case main body 32 so as to be rotatable about a rotation shaft 34. A setting seat 35 is provided on the back of the case body 32.
Are integrally formed, and the setting seat 35 is
Is in contact with Further, a U bolt 37 is attached to the setting seat 35, and the U bolt 37 can rotate between a vertical position shown in FIG. 4 and a horizontal position shown in FIG. Then, the U-bolt 37 is set in the state shown in FIG. 1, and the television receiver case 31 is attached to the mast 36 with the holding metal 38 and the wing nut 39.

2 and 3, the case body 32
Has a shape in which the front surface is largely open, and three conductor connecting cylinders 42 are formed side by side on a bottom wall 41 as a base. The lower and upper portions of the conductor connecting tube portion 42 are open, and the inner surface thereof has a circular cross section,
The diameter decreases slightly from the bottom to the top. On the upper surface, that is, the inner surface of the bottom wall 41, three protrusions 43a, 43b, and 43c are integrally formed between the conductor connecting tube 42 at the center and the conductor connecting tube 42 at the end. Is formed. Further, the upper surface of the bottom wall 41 is inclined so as to be lowered toward the front side for die-cutting at the time of manufacturing. However, since it is difficult to support the shield case S or the like as it is, it is substantially horizontal at four places. The support surface 44 is formed so as to protrude from the upper surface of the bottom wall 41.

A pair of left and right side walls 4 of the case body 32 is provided.
On the inner surface of 6, a circuit board receiving portion 47 is formed so as to protrude integrally therewith. Further, a circuit board receiving portion 49 is integrally formed on the inner surface of the upper wall 48 of the case main body 32 so as to protrude therefrom. A protruding portion 5 is provided on the front side of the circuit board receiving portion 49.
1 is formed to protrude. In addition, 53 is a waterproof cap.

In the case where the television receiving device case 31 configured as described above is used for a system for home listening using CS broadcasting, the television receiving device case 3 is used.
Reference numeral 1 denotes a UHF / VHF booster 6, a BS-IF / VU booster 2, and a CS / BS-IF / VU mixed amplifier 1.
2 is used as a case for storing each electronic circuit element. Further, since the CS-IF electronic circuit element needs to be shielded as described above, the electronic circuit element is mounted in the shield case S shown in FIG. On the other hand, when the television receiving device case 31 is used for a system for home co-listening without incorporating CS broadcasting, ie, BS / UHF / VH
Home co-listening system that handles F broadcasts or UHF
/ VHF broadcasting system for home listening,
The television receiver case 31 accommodates electronic circuit elements such as the UHF / VHF booster 6 and the BS-IF / VU booster 2. Since this electronic circuit element does not need to be shielded, it is mounted on a circuit board K shown in FIG. 7, and this circuit board K is fixed inside the television receiver case 31.

As shown in FIGS. 4 to 6, the shield case S is made of sheet metal and has a box shape having open front and rear surfaces. It is covered with a lid 54 and a rear lid 55.
Projections 57 project from the lower ends of the left and right side walls 56 of the shield case S, respectively. Further, three plug seats 58 are attached to the bottom wall of the shield case S. The plug seat 58 is used for a VU input terminal, a BS / CS-IF input terminal, and a mixed signal output terminal. The VU input terminal plug seat 58 is a VHF antenna 3 and a UHF antenna shown in FIG. 4 is connected with a coaxial cable, BS
The plug seat 58 for the / CS-IF input terminal is the BS antenna 1
And CS antennas 8, 9 via coaxial cables. Further, the plug seat 58 for the output terminal is connected to the distributor 13 by a coaxial cable. The connection between the coaxial cable and the plug seat 58 is performed by inserting a plug provided at the end of the coaxial cable into the plug seat 58.

Since the case body 32 has the upper wall 48, the shield case S needs to be attached to the case body 32 at an angle as shown in FIG.
Therefore, the inner diameter of the conductor connecting tube 42 of the case body 32 is made larger than the outer diameter of the plug seat 58 so that the plug seat 58 can be inserted into the conductor connecting tube 42 even in an oblique state. I have. As a result, as shown in FIG.
Is stored in the case body 32, the plug seat 5
A gap 59 is formed between the conductor 8 and the conductor connecting cylinder 42. Also, a nut 61 screwed into the plug seat 58
Is composed of a hexagonal nut portion 62 and a cylindrical portion 63, and the nut portion 62 and the cylindrical portion 63 are arranged coaxially in the axial direction of the nut 61. When the nut 61 is tightened, the cylindrical portion 63 fits into the gap 59 to position the plug seat 58 with respect to the conductor connecting cylindrical portion 42.

The shield case S is made of a case body 32.
The protrusion 57 formed at the lower portion of the side wall 56 of the shield case S is placed on the support surface 44 of the case main body 32 in the state of being stored in the case. On the other hand, the lower surface of the shield case S is placed on protrusions 43a and 43c as shield case support portions formed on the bottom wall 41 of the case main body 32.
As described above, since the shield case S is provided with the protrusion 57 as the shield case-side protrusion, and the case body 32 is provided with the protrusions 43a and 43c as the case-side protrusion, the front cover 54 and the rear cover 54 are provided. The lower end of 55 does not come into contact with the bottom wall 41 of the case main body 32, so that there is no hindrance to the attachment / detachment of the front cover 54, and the front cover 54 and the rear cover 55 are not deformed. Then, after storing the shield case S in the case main body 32, as shown in FIG. 6, the cover 33 of the television receiver case 31 is turned to cover the case.

On the other hand, when the circuit board K is housed in the case main body 32 of the television receiver case 31, as shown in FIG. , 49 and the projection 43c,
The front surface of the circuit board K is engaged with the protruding portions 51 and 43b of the case main body 32. In this manner, the circuit board K is held and fixed by the front and rear protrusions as the circuit board support. The connection between the circuit board K and the coaxial cable is performed by inserting the coaxial cable into the conductor connecting tube 42 and soldering the end of the coaxial cable to the circuit board K.

Next, a second embodiment of the electronic equipment case according to the present invention will be described with reference to FIGS. FIG. 8 is a bottom view of the case body in the second embodiment. FIG. 9 is a cross-sectional view of the electronic device case. In the description of the second embodiment, components corresponding to the components of the first embodiment are denoted by the same reference numerals, and detailed description thereof will be omitted.

In FIGS. 8 and 9, the three conductor connecting cylinders 71 formed on the bottom wall 41 of the case body 32 of the second embodiment are different from the conductor connecting cylinder 42 of the first embodiment. The inner surface shape is different. That is, the inner surface of the conductor connecting tube 42 of the first embodiment shown in FIG. 7 has a circular cross section, but the conductor connecting tube 71 of the second embodiment is different from the conductor connecting tube of the first embodiment. A guide member 73 having an inclined surface 72 is additionally formed on the use cylinder portion 42.
The thickness of the guide body 73 increases as it goes upward, that is, from the outside to the inside of the case body 32. Therefore, the internal space of the conductor connecting tubular portion 71 is narrowed upward as it goes up due to the inclined surface 72 of the guide body 73. The upper surface of the guide body 73 covers the lower surface of the circuit board K. The case body 32 of the second embodiment can be easily manufactured by changing a part of a mold for manufacturing the case body 32 of the first embodiment. That is, this is performed by replacing the mold member for the conductor connecting tube portion 42 of the first embodiment with the mold member for the conductor connecting tube portion 71 of the second embodiment.

In the second embodiment constructed as described above, when the coaxial cable is inserted into the conductor connecting tubular portion 71, the end of the coaxial cable is guided by the inclined surface 72, and the case body 32
, The distal end of the coaxial cable does not abut against the side end of the circuit board K, so that the insertion of the coaxial cable is not hindered. On the other hand, in the case of the first embodiment shown in FIG. 7, the tip of the coaxial cable abuts on the side end of the circuit board K, and the insertion of the coaxial cable may be hindered.

[0025]

As described above, according to the present invention, the shield case can be supported by the shield case supporting portion and the circuit board can be supported by the circuit board supporting portion. Therefore, a shield case or a circuit board can be stored in this electronic device case. As a result, one type of electronic device case can handle both a shield case and a circuit board without manufacturing two types of electronic device cases, an electronic device case for a shield case and an electronic device case for a circuit board. be able to.

The outer diameter of the plug seat of the shield case is
Since the inner diameter of the conductor connection tube is smaller than the inner diameter of the conductor connection tube, even when the shield case is stored in the case body, even if the shield case is inclined, the plug seat is easily inserted into the conductor connection tube of the case body can do. Since the nut screwed into the plug seat is composed of a polygonal nut portion and a cylindrical portion formed coaxially with the nut portion,
The gap formed between the plug seat and the conductor connecting tubular portion is closed by the cylindrical portion of the nut screwed into the plug seat. Therefore, the plug seat and the conductor connection tubular portion are positioned by the cylindrical portion of the nut, and the shield case can be fixed at a predetermined position of the case body.

Further, a case-side protrusion is formed on the inner surface of the base of the case body, while a shield case-side protrusion is formed on the wall of the shield case. A gap is formed between the first and second walls. Therefore, the cover of the shield case does not come into contact with the case body. As a result, even after the shield case is attached to the case main body, the cover of the shield case can be attached and detached, and inspection and inspection inside the shield case can be easily performed.

The circuit board supporting portion is composed of a first projecting portion that contacts one surface of the circuit board and a second projecting portion that contacts the other surface of the circuit board. A circuit board can be sandwiched. Therefore, the circuit board can be firmly fixed.

Further, the inner surface of the conductor connecting tubular portion may have a structure in which a guide body having an inclined surface is added to a tubular portion having a circular cross section. In this case, the distal end of the coaxial cable inserted into the conductor connecting tubular portion is inserted while being guided by the inclined surface of the guide body. Therefore, the end of the coaxial cable can be guided inside the electronic device case without contacting the circuit board or the like. As a result, the operation of introducing the coaxial cable into the electronic device case can be easily performed.

By the way, when the guide body is not formed, the plug seat can be inserted into the conductor connecting tube. Then, by exchanging a part of a mold for manufacturing the case body, that is, a mold member for molding the conductor connection cylinder, a case body having no guide body in the conductor connection cylinder and a case body having a guide body And can be manufactured. Therefore, most of the molds for molding the case main body can be shared, and the manufacturing cost of the case main body can be reduced.

[Brief description of the drawings]

FIG. 1 is a side view showing a state in which an electronic device case according to a first embodiment of the present invention is attached to a mast.

FIG. 2 is a cross-sectional view of a case main body of the electronic device case.

FIG. 3 is a front view of FIG. 2;

FIG. 4 is a view for explaining a state in which a shield case is stored in a case body.

FIG. 5 is a view for explaining a state in which a shield case is housed in a case body.

FIG. 6 is a sectional view of the electronic device case in a state where the shield case is housed.

FIG. 7 is a sectional view showing a state where a circuit board is housed in a case main body.

FIG. 8 is a bottom view of a case main body according to the second embodiment.

FIG. 9 is a sectional view of an electronic device case.

FIG. 10 is a system diagram of a system for home listening.

[Explanation of symbols]

 K circuit board S shield case 31 television receiver case (electronic device case) 32 case main body 33 lid 41 bottom wall (base) 42 conductor connecting cylinder 43a, 43b, 43c protrusion 44 support surface 47 circuit board receiver 49 Circuit board receiving portion 51 Projecting portion 57 Projecting portion 58 Plug seat 59 Clearance 61 Nut 62 Nut portion 63 Cylindrical portion 71 Conductor connecting cylinder portion 72 Inclined surface 73 Guide body

 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-8-32267 (JP, A) JP-A-1-214199 (JP, A) JP-A-4-249398 (JP, A) 23585 (JP, U) Japanese Utility Model Showa 62-201987 (JP, U) Japanese Utility Model Showa 56-17725 (JP, U) Japanese Utility Model Utility Model 557878 (JP, U) Japanese Utility Model Showa 62-45889 (JP, U)

Claims (4)

(57) [Claims] 1. A with houses either the electronic circuit elements are mounted on an electronic circuit element or the circuit board is incorporated in the shield case inside an electronic device case comprising a case body and the lid A cable guide protruding from the base of the case body ;
Body connecting tube portion and the shield case formed on the inner surface of the case body
And a circuit board formed on the inner surface of the case body.
A circuit board support portion, a plug seat attached to a wall portion of the shield case, and a case where the shield case is stored in the case body.
Into the cable conductor connecting tube of the case body.
Screwed into the inserted plug seat from outside the case body.
And a polygonal nut and coaxial with this nut
And a nut formed of a cylindrical portion formed at the outer periphery of the cable conductor connecting tube portion.
Diameter is smaller than the diameter, and
Into the gap formed between the plug seat and the plug seat.
An electronic device case , wherein the cylindrical portion of the nut is fitted . 2. The method according to claim 2, wherein the cable conductor connecting tubular portion is formed.
Case side protrusion is formed on the inner surface of the base of the case body
The projecting part on the case side is fitted with a plug seat.
Wall of the shield case, which is in contact with the wall of the shield case
Is formed with a shield case side protrusion.
The cable case connection tube has a shape
The electronic device case according to claim 1, wherein the electronic device case is in contact with an inner surface of a base of the formed case main body . 3. The circuit board supporting portion is provided on one surface of a circuit board.
A first protrusion that abuts the other surface of the circuit board;
The circuit board is sandwiched between the pair of protrusions.
2. The apparatus according to claim 1, wherein
Electronic device case as described . 4. An inner surface of the cable conductor connecting tube portion,
A guide body with an inclined surface is added to a cylindrical section with a circular cross section.
The guide body has an inclined surface
The inner space of the bull conductor connection tube is from the outside of the case body
The feature is that it becomes narrower toward the inside
The electronic device case according to claim 1 .