JPH0963667A - Connecting structure of coaxial cables - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the installing work of a connector and a fitting connector, and the heat radiating property of the connection. SOLUTION: A connector 20 installed to a base plate 1 is provided at the upper side of the side surface 16a of a connecting terminal 16 of a fitting connector 10, and after the connector 20 is set by positioning its groove 24 on the side surface 16a, the plate 1 is lowered and the disk form connecting terminal 16 is inserted to the groove 24 from the side surface 16a. In this case, the connecting terminal 16 is contacted with the terminal 25a of a connecting terminal 25, and inserted while pressing the terminal 25 to the inner surface 24a side of the groove 24. The terminal 25a is energized elastically to the inner surface 24a side, and when the connecting terminal 16 is inserted in the groove 24, it is held by the inner surface 24b and the terminal 25a.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connection structure between a coaxial cable used as an electric signal line and an electrode on a substrate, and particularly in a CATV device or the like, it is electrically connected to a coaxial cable introduced from the outside. The present invention relates to a connection structure between a fitting connector attached to a housing and a connector provided on a board of an internal unit arranged in the housing.

[0002]

2. Description of the Related Art Conventionally, for example, a connection structure shown in FIG. 8 is known as a connection structure used for CATV equipment. In this connection structure, a connector 30 composed of a pair of receiving fittings 31, 32 attached to a board 33 and a center terminal 44 of a fitting connector (not shown) electrically connected to a coaxial cable (not shown). It is configured to connect with. Receptacles 31, 32 for the connector 30
Are elastically biased toward each other. Further, the receiving portions 35a and 35b are provided on the left side and the lower side of the connector 30 in the drawing, respectively, so that the linear center terminal 44 can be easily attached and detached between the receiving metal fittings 31 and 32. The connector 30 having such a configuration, together with the board 33,
By pressing downward in the figure, the center terminal 44 is received from the groove 33a provided on the substrate 33 via the receiving portion 35b.
It is arranged between 1 and the receiving fitting 32. Since the receiving fitting 31 and the receiving fitting 32 are elastically biased toward each other, the center terminal 44 and the receiving fittings 31, 32 are in good contact with each other. Then, the center terminal 44 and the connector 3
0 is electrically connected.

[0003]

However, in the above disclosed technique, even if the vertical clearance between the center terminal 44 and the receiving metal fittings 31 and 32 can be absorbed, the horizontal clearance cannot be absorbed, so that the mounting work can be performed. There is a problem that it is not good. In addition, in a cable transmission system such as a CATV, in order to supply operating power to the devices in the system, a coaxial cable with a commercial frequency of 30 to 60 V is often superimposed and fed. In terms of capacity, the maximum capacity is about 10 A in one superposition system. The center terminal 44 and the receiving fittings 31, 32 generate heat due to the superimposed current. In particular, the contact point generates heat remarkably due to the contact resistance, and there is a problem in connection reliability.

Therefore, in view of the above problems, it is an object of the present invention to provide a connection structure which absorbs vertical and horizontal clearances between a connector and a fitting connector and has good workability in mounting, and at the same time, heat radiation of the connection portion. It is to provide a connection structure having excellent characteristics.

[0005]

In order to solve the above problems, the structure of the present invention is a connection structure for electrically connecting an internal conductor of a coaxial cable and an electrode on a substrate. A first connecting portion that can be attached to and detached from the cable, a second connecting portion that can be attached to and detached from the housing in which the board is housed, and the inside of the coaxial cable that is provided on the central axis A center terminal electrically connected to the conductor, a plate-shaped connection terminal electrically connected to the center terminal on the second connection portion side, and an insulator provided around the center terminal. And a second connector having a plurality of contact points, one end of which is electrically connected to the electrode on the substrate and the other end of which is formed so as to apply an elastic force. The technical means of adopting this is adopted.

Further, in the structure of the second invention, the second connector further comprises an insulating case having a groove portion, and the elastic force is urged toward one inner side surface side of the groove portion. Thus, the technical means that the other end is arranged on the other inner surface of the groove is adopted.

According to the configuration of the third invention, the second connector is
The technical means is composed of a pair of metal pieces that are elastically biased toward each other, and one of the second connectors is provided with a groove having a width larger than the diameter of the center terminal. is there.

[0008]

ACTION AND EFFECT The first action of the present invention having the above-mentioned constitution is that the other end of the second connector having a plurality of contact points is formed so that the elastic force urges, and the urging direction of the elastic force. While pressing the other end of the second connector in the opposite direction, the plate-shaped connection terminal is arranged. As a result, the connection terminal is elastically biased from the other end of the second connector, the second connector has a plurality of contact points, and the connection terminal is plate-shaped, so The electrical and mechanical connection with the other end of the two connectors is good. Further, the left-right clearance between the first connector and the second connector can be absorbed, and the workability at the time of mounting can be improved. In addition, since the connection terminal of the first connector is plate-shaped, the heat dissipation characteristics are good, and the reliability of the connection portion can be further improved. Further, since the second connector can be formed of one metal piece, the cost of the connection structure can be reduced (claim 1).

The second function is to insert the plate-shaped connecting terminal of the first connector into the groove provided in the case of the second connector from the side surface. At this time, the connection terminal is inserted while urging the other end of the second connector toward the one inner surface side. The other end of the second connector elastically urges the connection terminal toward the other inner surface side, and since there are a plurality of contact points between the second connector and the connection terminal, the second connector is connected to the second connector. Good electrical and mechanical connections to the terminals are made. As described above, since the electrical and mechanical connection between the connection terminal of the first connector and the second connector can be easily performed, the coaxial cable and the board on the substrate are connected via the connection terminal and the second connector. Electrical connection with the electrode can be easily performed. Especially, by making the connection terminal of the first connector plate-like and providing a plurality of contact points, it is possible to absorb the left-right clearance between the first connector and the second connector, and workability at the time of mounting Can be improved. In addition, since the connection terminal of the first connector is plate-shaped, the heat dissipation characteristics are good, and the reliability of the connection portion can be further improved. (Claim 2)

A third function of the present invention is to configure the second connector with a pair of spring-like metal pieces elastically biased toward each other. Then, the center terminal is inserted along the groove formed on one of the metal pieces, and the plate-shaped connection terminal of the first connector is inserted between the metal pieces, whereby the connection terminal of the first connector is Since the pair of metal pieces is elastically biased from the outside, the contact between the connection terminal of the first connector and the pair of metal pieces is excellent. Since the connection terminal of the first connector is plate-shaped and the second connector has a plurality of contact points, it is possible to absorb the vertical and horizontal clearances between the first connector and the second connector. Since the first connector and the second connector can be easily connected, the workability of mounting can be improved. Moreover, since the connection terminal of the first connector is plate-shaped, the heat dissipation characteristics are good, and the reliability of the connection portion can be further improved. Furthermore, since the second connector can be composed of only one pair of metal pieces, the second connector can have a simple structure, and the cost of the connection structure can be reduced. (Claim 3)

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described below based on specific embodiments. First, a fitting connector in the first embodiment according to the present invention and a bidirectional trunk amplifier using the connector will be described below. FIG.
FIG. 3 is a structural diagram showing a configuration of bidirectional trunk amplifier 100. The bidirectional trunk amplifier 100 is mainly composed of a case main body 71, a lid 81, and various circuit units arranged inside them. A high frequency amplification unit 72 and the like are arranged inside the case body 71. In addition, inside the lid 81, a power supply circuit unit 82 and a status monitor unit 83 for always grasping the operating state of the system and easily managing the line in a large-scale system are arranged. The high frequency amplification unit 72 and the power supply circuit unit 82 are electrically connected by wiring cords 75. The high frequency amplification unit 72 and the status monitor unit 83 are electrically connected by wiring cords 76. Further, the case body 71 is provided with a plurality of fitting connectors 10 (four in the figure) to be connected to the coaxial cable (not shown), and the connectors (see FIGS. 4) is provided. By electrically connecting the fitting connector 10 and the connector, the coaxial cable and the high frequency amplification unit 72 are electrically connected.

First, the structure of the fitting connector 10 in the configuration of the first embodiment according to the present invention will be described below. FIG. 3 shows the configuration of the fitting connector 10, and a front view is shown in (a) and a side view is shown in (b). Fitting connector 10
Is a detachable connection part 1 that connects to the coaxial cable at one end
1 (corresponding to the first connecting portion), the other end of which is connected to the housing (corresponding to the case main body 71 in FIG. 5) and the detachable connecting portion 12
(Corresponding to the second connection portion) are formed. A nut portion 15 is provided between the connecting portion 11 and the connecting portion 12, and is used when fixing the fitting connector 10 to the housing. Further, an O-ring 17 is arranged on the side of the nut portion 15 on the connecting portion 12 to maintain airtightness between the housing and the fitting connector 10. A substrate 1 (see FIGS. 1 and 4) provided with an electronic circuit (not shown) is housed in the housing. A center terminal 13 (corresponding to a center terminal) is arranged on the central axis of the fitting connector 10, and a disc-shaped connection terminal 16 is provided on the connection portion 12 side.
(Corresponding to a plate-shaped connection terminal) is fixed perpendicularly to the central axis. An insulator (not shown) is provided around the center terminal 13, and the center terminal 13 is fixed to the insulator.

Next, the structure of the connector in the structure of the first embodiment of the present invention will be described below. FIG.
Shows the structure of the connector 20 (corresponding to the connector) provided on the board. A front view is shown in FIG.
Side views are respectively shown in FIG. The connector 20 is composed of an insulating case 21 (corresponding to a case) and a metallic connector terminal 25. The case 21 has a claw 22 for fixing to the board 1, and a fitting connector 10
The groove 24 (corresponding to the groove portion of the case) as the insertion portion of the connection terminal 16, the guide 23a that facilitates the insertion of the connection terminal 16 into the groove 24, and the terminal holding portion 23b that holds the connector terminal 25. Has been formed. Connector terminal 25
Is formed in a substantially U shape, and has a plurality of (three in the figure) terminals 25a electrically connected to the connection terminals 16 of the fitting connector 10 at one end and an electrode 26 provided on the substrate 1 at the other end. A terminal 25b electrically connected to is provided.

This U-shaped connector terminal 25
The board-side terminal 25b is placed outside and the inside
The connector 20 is assembled by inserting the connector terminal 25 in the first terminal holding portion 16 and mounting the connector terminal 25 in the case 21. After assembling the connector 20 in this manner, the nails 22 are provided in the predetermined holes 1a to 1d provided on the substrate 1.
By inserting the terminals 25b and the terminals 25b, the board 1 and the connector 20 are mechanically connected, and the electrodes 26 formed on the board 1 and the terminals 25b are connected by soldering or the like. The electrode 26 and the terminal 25b are electrically connected.

Next, the connection between the fitting connector 10 and the connector 20 shown above will be described below with reference to FIG. The fitting connector 10 is attached to the case body 71 as shown in FIG.
FIG. 1 shows a front view (a) showing a configuration when the fitting connector 10 and the connector 20 are aligned with each other and a front view (b) showing a configuration at the time of connection. When the flat board 1 is housed in the case body 71 from the top to the bottom, the connector 20 attached to the board 1 is provided with the side surface portion 16 of the connection terminal 16 of the fitting connector 10.
The groove 24 of the connector 20 is arranged above the connection terminal 1a.
It is arranged so as to be located on the side surface portion 16a of 6 (FIG. 1A).

Fitting connector 10 and connector 2
After aligning with 0, lower the board 1 and connect the connector 2
The connection terminal 16 is inserted into the 0 groove 24 from the side surface portion 16a. At this time, the connection terminal 16 contacts the terminal 25 a of the connector terminal 25, and the terminal 25 a is connected to the inner surface 24 a of the groove 24.
It is inserted while pushing it to the side. The terminal 25a is elastically biased toward the inner side surface 24b, and when the connection terminal 16 is inserted into the groove 24, the terminal 25a is sandwiched between the inner side surface 24b and the terminal 25a (FIG. 1B).

In this way, the fitting connector 1
By connecting 0 and the connector 20, the connection terminal 1
Since 6 is sandwiched between the inner side surface 24b and the terminal 25a from the outside, the fitting connector 10 and the connector 20
Good electrical and mechanical connection with Also,
When the fitting connector 10 is attached to the housing, even if there is a change in the attachment angle around the central axis, the connection terminal 16 has a disk shape, and therefore the fitting connector 1
The fitting connector 10 and the connector 20 can be easily connected regardless of the mounting angle about the central axis of 0.

Further, the connection terminal 16 is formed in a disk shape, and a plurality of terminals 25a of the connector 20 are arranged in the left-right direction (3 in the figure).
By providing each of them, the horizontal clearance between the fitting connector 10 and the connector 20 can be absorbed. FIG. 2 shows a cross section taken along the line AA in FIG. 1. Even if the connection terminal 16 is displaced to the left or right with respect to the connector 20, the connection terminal 16 is positioned between the guides 23a.
The connection terminal 16 can be sufficiently inserted into the groove 24,
The terminal 25a and the connection terminal 16 can be electrically connected. In this way, the fitting connector 10 and the connector 20
Even if there is some misalignment in the left-right direction when installing with, electrical connection can be made.

In this embodiment, the connecting portion 11 of the fitting connector 10 has a female screw shape, but it may have a male screw shape. Although the connector 20 is formed separately from the board 1 in this embodiment, the case 21 of the connector 20 may be formed integrally with the board 1. In this embodiment, the connection terminal 16 of the fitting connector 10 has a disk shape, but the present invention is not limited to this, and the connection terminal 16 may have a regular polygonal shape, and if it has a plate shape, the shape thereof may be a polygonal shape. Is not limited. In this embodiment, the center terminal 13 is fixed to the insulator, but the center terminal 13 may be rotatable with respect to the insulator.

Next, a second embodiment according to the present invention will be described below with reference to FIG. 6 is a front sectional view of the connector 40 (corresponding to the second connector) in the second embodiment.
FIG. 6B shows a left side view in FIG. 6A. The connector 40 includes two terminals 41 and 42 (corresponding to a pair of metal pieces), and the terminal 42 is the fitting connector 1.
It is arranged on the 0 (see FIG. 3) side. The terminals 41 and 42 respectively have board-side terminals 41b and 42b electrically connected to the electrodes 26 formed on the board 1 at one end, and a receiving portion 41a that receives the connection terminal 16 of the fitting connector 10 from below in the figure. 42a is provided. In addition, a groove 42c (corresponding to a groove portion) is formed in the terminal 42 from the end portion on the receiving portion 42a side.

The connector 40 having such a structure is attached to the substrate 1, and the electrode 26 and the substrate-side terminals 41b and 42b are electrically connected. Then, the substrate 1 is pushed downward in the drawing to insert the center terminal 13 of the fitting connector 10 into the groove 4
2c, while receiving the connection terminal 16 receiving portion 41a,
It is inserted between the terminals 41 and 42 via 42a.
Since the terminals 41 and 42 are elastically biased toward each other, the connection terminal 16 of the fitting connector 10 and the terminals 41, 42 are in good contact with each other.

As described above, also in the second embodiment, the electrical connection between the connector 40 and the fitting connector 10 can be performed well, and a plurality of contact points (see FIG. 6) can be obtained.
3) are provided, the vertical and horizontal clearances between the connector 40 and the fitting connector 10 (horizontal direction in FIG. 6B) can be absorbed, so that workability at the time of connection is improved. improves. Further, by making the connector 40 have a simple structure including only one pair of metal pieces, it is possible to realize cost reduction of the connection structure. In this embodiment, the connector 40 is configured to receive the connection terminal 16 of the fitting connector 10 from below.
It may be configured to receive from another direction, and the receiving portions may be provided at a plurality of locations.

Next, a third embodiment according to the present invention will be described below with reference to FIG. FIG. 7 is a front view (FIG. 7A) and a right side view (FIG. 7) showing a configuration of a connector terminal 25 (corresponding to a second connector) as a third embodiment.
(B)). The feature of this embodiment is that the second connector is composed of only the connector terminals 25, and the configuration of the fitting connector is similar to that of the first and second embodiments. As a result, the connector terminal 25 is pushed downward together with the board 1 to bring the connection terminal 16 of the fitting connector 10 (see FIG. 3) into contact with the terminal 25a. At this time, the terminal 25a is elastically biased to the left in the drawing,
Connection terminal 16 and terminal 25 of the fitting connector 10
a makes good contact.

Thus, also in the third embodiment, the electrical connection between the connector terminal 25 and the fitting connector 10 can be satisfactorily performed. In addition, since a plurality of terminals 25a (three in the figure) are provided, a plurality of contact points are present, and the connector terminal 25 and the fitting connector 10 are vertically and horizontally (left and right in FIG. 7A). ) Because it can absorb the clearance of
Workability at the time of connection is improved. Furthermore, the connector terminal 25
With a simple structure having only one metal piece, it is possible to further reduce the cost of the connection structure.

In this embodiment, the bidirectional trunk amplifier 100 is applied. However, the present invention is not limited to this, and any device that needs to be connected to the coaxial cable may be applied.

As described above, according to the present invention, the plate-like connecting terminal of the fitting connector is inserted into the groove portion of the connector in which the spring-like terminal is arranged on one inner side surface to form the connecting terminal. Good electrical and mechanical connection with the connector terminal can be achieved, and electrical connection between the coaxial cable and the electrode on the substrate can be easily achieved through the connection terminal and the connector terminal. In particular, by making the connecting terminal of the fitting connector plate-like and providing the connector with a plurality of contact points, the horizontal clearance between the fitting connector and the connector can be absorbed, and the workability at the time of installation can be improved. it can. Further, since the connection terminal of the fitting connector is plate-shaped, the heat dissipation characteristics are good, and the reliability of the connection portion can be further improved. If the connector is composed of a pair of metal pieces, the structure can be simpler and the cost of the connection structure can be reduced.

[Brief description of drawings]

FIG. 1 is a front view (a) showing a configuration when a fitting connector and a connector of a first embodiment according to the present invention are aligned, and a front view (b) showing a configuration when the fitting connector and the connector are connected. ).

FIG. 2 is a cross-sectional view showing the configuration of the AA cross section when the fitting connector of the first embodiment according to the present invention is connected to the connector.

FIG. 3 is a front view (a) and a side view (b) showing a structure of a fitting connector according to a first embodiment of the present invention.

FIG. 4 is a front view (a) and a side view (b) showing a structure of a connector according to a first embodiment of the present invention.

FIG. 5 is a structural diagram showing a structure of a bidirectional trunk amplifier including a fitting connector and a connector according to a first embodiment of the present invention.

FIG. 6 is a front sectional view (a) and a left side view (b) showing a configuration of a connector of a second embodiment according to the present invention.

FIG. 7 is a front sectional view (a) and a right side view (b) showing a configuration of a connector of a third embodiment according to the present invention.

FIG. 8 is a structural diagram showing a structure of a conventional connector for CATV equipment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 board 1a-1d hole part 10 fitting connector 11,12 connection part 13 center terminal 15 nut part 16 connection terminal 20 connector 21 case 22 claw 23a guide 23b terminal holding part 24 groove 25 connector terminal

Claims (3)

[Claims] 1. A connection structure for electrically connecting an inner conductor of a coaxial cable and an electrode on a substrate, wherein a first connection portion that can be attached to and detached from the coaxial cable and the substrate are housed. A second connection part that can be attached to and detached from the housing
A center terminal provided on the central axis and electrically connected to the inner conductor of the coaxial cable at the first connection portion side,
A first connector having a plate-shaped connection terminal electrically connected to the center terminal on the second connection portion side, and an insulator provided around the center terminal, and a plurality of contact points And a second connector having one end electrically connected to the electrode on the substrate and the other end formed to urge an elastic force. Construction. 2. The second connector further comprises an insulative case provided with a groove, and the other end of the second connector is arranged so that an elastic force is urged toward one inner side surface of the groove. The connection structure for a coaxial cable according to claim 1, wherein the connection structure is arranged on the other inner surface of the groove. 3. The second connector comprises a pair of metal pieces that are elastically biased toward each other, and one of the second connectors has a width larger than a diameter of the center terminal. The coaxial cable connection structure according to claim 1, wherein a groove is provided.