JP6782810B2 - Coaxial cable connector - Google Patents

Description

The present invention relates to a coaxial cable connector for connecting a coaxial cable, such as a television outlet that supplies an antenna reception signal to a television receiver.

Coaxial cable connectors are often used to input and output signals to devices that handle high frequency signals. For example, an antenna reception signal is supplied from a TV antenna to a TV outlet provided on an indoor wall surface or the like via an input side coaxial cable. The antenna reception signal is supplied from the TV outlet to the TV receiver via the output side coaxial cable.

By the way, since the IF frequency band of the antenna reception signal overlaps with the band of other communication services such as wireless LAN, there is a problem that noise due to interference is likely to occur. Therefore, a coaxial cable connector having good workability and excellent shielding property against noise has been proposed. In Patent Document 1, a box-shaped housing having one side opened and a box-shaped housing arranged in the housing and input are provided. A terminal fitting that electrically connects the core wire of the side coaxial cable and the core wire of the F-type connector attached to the output side coaxial cable, and a lid member that is integrally made of metal and covers the opening of the housing. The provided TV outlet is disclosed.

JP-A-2017-103122

In the television outlet of Patent Document 1, the core wire of the input side coaxial cable is inserted into the insertion hole of the terminal case and sandwiched between the spring pieces of the terminal fittings. At this time, it was difficult to confirm whether or not the core wire was securely sandwiched between the terminal fittings. Further, since only the core wire of the input side coaxial cable is inserted into the terminal case, the shielding property around the connection portion between the core wire and the terminal fitting is not sufficient. Further, there is room for further improvement in workability when the core wire of the input side coaxial cable is sandwiched between the spring pieces of the terminal fittings via the insertion holes of the terminal case.

In view of the above problems, it is an object of the present invention to provide a coaxial cable connector which can improve the shielding property around the connection portion between the core wire of the coaxial cable and the terminal fitting and has excellent workability.

In order to achieve the above object, the first configuration of the present invention is a coaxial cable connector including a housing, a terminal fitting, a terminal case, a terminal plate, and a lid material. The housing is made of metal and has an opening on one side surface. The terminal fitting has a first spring piece that sandwiches the core wire of the input side coaxial cable, and a second spring piece that sandwiches the core wire of the F-type plug attached to the output side coaxial cable. The terminal case is arranged in the housing, and is formed with an insertion hole for accommodating the terminal metal fitting and inserting the core wire of the input side coaxial cable. The terminal plate is made of metal and a terminal case is attached. The lid material is made of metal and can open and close the opening of the housing. The terminal plate has a tubular shape with one end sealed, and includes a shield portion for inserting an input-side coaxial cable and covering a portion of the terminal case in which the first spring piece is housed.

According to the first configuration of the present invention, if the input side coaxial cable is inserted into the shield portion of the terminal plate, the core wire is inserted into the insertion hole of the terminal case, and the lid material is fixed to the housing, the input side coaxial cable The connection work to the coaxial cable connector of is completed. That is, since the shield portion functions as an insertion guide for the input side coaxial cable, the core wire can be smoothly inserted into the insertion hole. Therefore, the man-hours required for connecting the input side coaxial cable can be reduced. Further, since the periphery of the first spring piece, which is the connection portion between the core wire of the input side coaxial cable and the terminal fitting, is shielded, the electromagnetic shielding property for the input side coaxial cable can be improved.

External perspective view of the TV outlet 1 according to the embodiment of the present invention as viewed from the indoor side. External perspective view of the TV outlet 1 of the present embodiment as viewed from the outdoor side. A perspective view of the housing 2 constituting the TV outlet 1 of the present embodiment as viewed from the indoor side. A perspective view of the housing 2 constituting the TV outlet 1 of the present embodiment as viewed from the outdoor side. A perspective view of the lid material 3 constituting the television outlet 1 of the present embodiment as viewed from the inside. A perspective view of the terminal cover 4 constituting the television outlet 1 of the present embodiment as viewed from the inside. A perspective view showing a state in which the housing 2 and the terminal cover 4 are removed from the TV outlet 1 of the present embodiment. Perspective view of the terminal case 10 as viewed from below A perspective view showing a state in which the second accommodating portion 10b is removed from the terminal case 10 of FIG. Perspective view of the terminal fitting 14 housed in the terminal case 10. Perspective view of the terminal plate 20 arranged in the housing 2 as viewed from the outdoor side. Perspective view of the terminal plate 20 arranged in the housing 2 as viewed from the indoor side. A plan view of the state in which the input side coaxial cable C1 is inserted into the shield portion 23 of the terminal plate 20 as viewed from the outdoor side. A view of the terminal plate 20 to which the terminal case 10 is mounted as viewed from below.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 and 2 are external perspective views of the television outlet 1 according to the embodiment of the present invention as viewed from the indoor side and the outdoor side, respectively. The TV outlet 1 electrically connects the input side coaxial cable C1 (see FIG. 13) and the output side coaxial cable C2 via the terminal fitting 14 (see FIG. 10) housed in the terminal case 10 (see FIG. 8). Connecting. The TV outlet 1 has a housing 2, a lid material 3, and a terminal cover 4.

3 and 4 are perspective views of the housing 2 constituting the television outlet 1 of the present embodiment as viewed from the indoor side and the outdoor side. The housing 2 is integrally formed of metal (for example, zinc die-cast) in a rectangular parallelepiped shape, and has an opening 2a that opens toward one side (outdoor side). The housing 2 houses the terminal case 10 and the terminal plate 20 (see FIG. 11). Bearing portions 5 that rotatably support the support shaft 3a of the lid member 3 are formed in the vicinity of both ends of the upper side 2b on one side of the housing 2. The lid material 3 is rotatably supported by the housing 2 with the support shaft 3a as a rotation fulcrum.

A cylindrical mounting shaft 6 is projected on the side surface of the other side (indoor side) of the housing 2. A screw groove 7 is engraved on the outer peripheral surface of the mounting shaft 6, and an F-type plug F (see FIG. 1) of the output side coaxial cable C2 can be screwed. A through hole 8 communicating with the inside of the housing 2 is formed in the central portion of the mounting shaft 6. Mounting pieces 9 projecting laterally are formed on the opposite side 2c of the housing 2 on the other side. The TV outlet 1 is fixed to the wall surface via the mounting piece 9.

FIG. 5 is a perspective view of the lid material 3 constituting the television outlet 1 of the present embodiment as viewed from the inside. The lid material 3 is integrally formed of metal (for example, zinc die-cast) so as to cover the opening 2a of the housing 2. The peripheral edge of the lid material 3 is formed so as to be in close contact with the peripheral edge of the opening 2a. Support shafts 3a projecting laterally are formed on both sides of the upper edge portion of the lid material 3.

A notch 3b through which the input side coaxial cable C1 is inserted is formed in the lower edge portion of the lid material 3. On the inner surface of the lid material 3, a plurality of (three in this case) lid material side ribs 3c extending in the horizontal direction are projected above the notch portion 3b. A through hole 3d through which the screw 40 penetrates is formed diagonally above the rib 3c on the lid material side.

FIG. 6 is a perspective view of the terminal cover 4 constituting the television outlet 1 of the present embodiment as viewed from the inside. The terminal cover 4 is formed of synthetic resin into a rectangular shape, and is attached to the side surface of the other side (indoor side) of the housing 2. An opening hole 4a for inserting the mounting shaft 6 (see FIG. 3) of the housing 2 and exposing it to the indoor side is provided in the central portion of the terminal cover 4. A recess 4b for connecting the F-type plug F of the output side coaxial cable C2 to the mounting shaft 6 is formed around the opening hole 4a from the indoor side.

Locking pieces 4c having a wedge-shaped tip are formed on both left and right side surfaces of the terminal cover 4. The terminal cover 4 is attached to the housing 2 by bending the locking piece 4c and engaging it with the engaging groove 9a (see FIG. 3) formed in the mounting piece 9 of the housing 2 from the inside.

FIG. 7 is a perspective view showing a state in which the housing 2 and the terminal cover 4 are removed from the television outlet 1. FIG. 8 is a perspective view of the terminal case 10 as viewed from below. FIG. 9 is a perspective view showing a state in which the second accommodating portion 10b is removed from the terminal case 10 of FIG. FIG. 10 is a perspective view of the terminal fitting 14 housed in the terminal case 10.

A terminal case 10 for accommodating the terminal fitting 14 is arranged in the housing 2. The terminal case 10 is made of a transparent resin material, and is composed of a first accommodating portion 10a and a second accommodating portion 10b.

The terminal fitting 14 has a first spring piece 14a that sandwiches the core wire C1a of the input side coaxial cable C1 that is inserted from below the housing 2, and a first spring piece 14a that sandwiches the core wire C2a of the output side coaxial cable C2 that is inserted from the indoor side. It has two spring pieces 14b.

The terminal fitting 14 is supported by the first accommodating portion 10a of the terminal case 10, and the first spring piece 14a of the terminal fitting 14 is accommodated in the first accommodating portion 10a. A first insertion hole 12 through which the core wire C1a (see FIG. 13) of the input-side coaxial cable C1 is inserted is formed on the lower surface of the first accommodation portion 10a. Since the terminal fitting 14 for connecting the input side coaxial cable C1 is covered with the first accommodating portion 10a, it is possible to prevent a short circuit between the core wire C1a of the input side coaxial cable C1 and the braided wire (not shown).

The second spring piece 14b of the terminal fitting 14 is housed in the second housing portion 10b. The second accommodating portion 10b has a tubular shape that protrudes indoors toward the inside of the mounting shaft 6 (see FIG. 1) of the housing 2, and as shown in FIG. 1, the tip of the second accommodating portion 10b is the mounting shaft 6 It is exposed from the through hole 8 of. At the center of the axis of the second accommodating portion 10b, a second insertion hole 13 through which the core wire C2a (see FIG. 1) of the output side coaxial cable C2 is inserted is formed.

11 and 12 are perspective views of the terminal plates 20 arranged in the housing 2 as viewed from the outdoor side and the indoor side, respectively. The terminal plate 20 is made of metal (for example, zinc die-cast), and the boss hole 21 formed along the side edge is formed in the boss 2d (see FIG. 4) formed at the peripheral edge of the opening 2a of the housing 2. It is fixed to the housing 2 by fitting. The terminal plate 20 is formed with a communication portion 22, a shield portion 23, a screw hole 25, and a retaining rib 27.

The communication portion 22 projects the first accommodating portion 10a of the terminal case 10 from the terminal plate 20 to the outdoor side (lid material 3 side). The shield portion 23 has a tubular shape in which one end (upper end) covering the communication portion 22 is sealed from the outdoor side (left side in FIG. 9). A circular cable insertion hole 23a is formed at the lower end of the shield portion 23. The inner diameter of the cable insertion hole 23a is substantially the same as the outer diameter of the input side coaxial cable C1.

A window portion 30 is formed on the outdoor side surface of the shield portion 23 at a position facing the communication portion 22. When the lid material 3 is open, the first spring piece 14a of the terminal fitting 14 is visible through the window portion 30 and the transparent terminal case 10 (first accommodating portion 10a).

The screw hole 25 is provided at a position facing the through hole 3d (see FIG. 5) with the lid material 3 closed. The retaining rib 27 is formed at a position facing the lid material side rib 3c (see FIG. 5) with the lid material 3 closed.

Next, a procedure for connecting the antenna and the television receiver using the television outlet 1 configured as described above will be described. FIG. 13 is a plan view of the state in which the input side coaxial cable C1 is inserted into the shield portion 23 of the terminal plate 20 as viewed from the outdoor side. FIG. 14 is a view of the terminal plate 20 to which the terminal case 10 is mounted as viewed from below. As shown in FIG. 13, with the lid material 3 (see FIG. 7) open, the input side coaxial cable C1 to which the received signal is supplied from the antenna is inserted into the cable insertion hole 23a of the shield portion 23 of the terminal plate 20. .. Then, the core wire C1a of the input side coaxial cable C1 is inserted into the first insertion hole 12 of the first accommodating portion 10a and sandwiched between the first spring piece 14a of the terminal fitting 14.

As shown in FIGS. 13 and 14, when the terminal case 10 is attached to the terminal plate 20, the first insertion hole 12 of the first accommodating portion 10a and the first spring piece 14a in the first accommodating portion 10a are inserted into the cable. It is located on a straight line L passing through the center of the hole 23a (the center of the axis of the shield portion 23). Therefore, simply by inserting the input side coaxial cable C1 into the shield portion 23, the core wire C1a of the input side coaxial cable C1 passes through the first insertion hole 12 and is accurately guided to the first spring piece 14a. At this time, it is possible to confirm the state in which the core wire C1a is sandwiched between the first spring pieces 14a via the window portion 30 and the first accommodating portion 10a formed in the shield portion 23.

Further, conduction ribs 23b extending in the insertion direction of the input side coaxial cable C1 are formed at four locations on the inner peripheral surface of the shield portion 23. When the input side coaxial cable C1 is inserted into the shield portion 23, the outer conductor (aluminum foil) C1b of the input side coaxial cable C1 and the conductive rib 23b come into contact with each other to form a shield structure of the input side coaxial cable C1. ..

The smaller the length W (see FIG. 13) of the window portion 30 formed in the shield portion 23 in the lateral direction, the more surely the radio wave leakage in the 2224 MHz to 3224 MHz band used in television broadcasting is kept within the standard. Can be done. On the other hand, the larger the length W of the window portion 30 in the lateral direction, the higher the visibility of the core wire C1a. Therefore, it is preferable to determine the length W of the window portion 30 in the lateral direction in consideration of the required effect of preventing radio wave leakage and the visibility of the core wire C1a.

Further, it is preferable that the terminal fitting 14 is arranged so that the surface of the first spring piece 14a on the window portion 30 side is located inward from the surface of the shield portion 23 by a certain distance or more. As a result, radio wave leakage from the window portion 30 can be suppressed more effectively.

When the lid material 3 is rotated and closed in this state, the input side coaxial cable C1 is sandwiched and held between the lid material 3 and the terminal plate 20. The input-side coaxial cable C1 pulled out from the housing 2 via the notch 3b of the lid material 3 has a diameter of the lid material-side rib 3c (see FIG. 5) and the retaining rib 27 (see FIG. 11). It is sandwiched in the direction and fixed. As a result, it is possible to suppress disconnection from the TV outlet 1 when the input side coaxial cable C1 is pulled.

After that, when the screw 40 (see FIG. 2) is screwed into the screw hole 25 from the through hole 3d and fastened with the lid material 3 closed, the lid material 3 is fixed to the housing 2 via the terminal plate 20. The notch 3b of the lid material 3 is substantially sealed by the input side coaxial cable C1.

When the TV outlet 1 assembled as described above is fixed to the wall surface, only the front surface of the terminal cover 4 and the mounting shaft 6 of the housing 2 are exposed from the wall surface to the indoor side. The F-type plug F (see FIG. 1) of the output side coaxial cable C2 is connected to the mounting shaft 6, and the core wire C2a is inserted into the insertion hole 12 and sandwiched between the second spring pieces 14b of the terminal fitting 14. As a result, the core wire C1a of the input side coaxial cable C1 and the core wire C2a of the output side coaxial cable C2 are connected via the terminal fitting 14, and the antenna reception signal is supplied from the antenna to the television receiver.

In the TV outlet 1 of the present embodiment, the input side coaxial cable C1 is inserted into the shield portion 23 of the terminal plate 20, the core wire C1a is inserted into the first insertion hole 12, the lid material 3 is closed, and the housing 2 is fitted with a screw 40. If fixed to, the connection work of the input side coaxial cable C1 to the TV outlet 1 is completed. That is, since the shield portion 23 functions as an insertion guide for the input side coaxial cable C1, the core wire C1a can be smoothly inserted into the first insertion hole 12.

In the television outlet 1 of the present embodiment, the connection state between the core wire C1a and the terminal fitting 14 (first spring piece 14a) can be visually recognized via the transparent terminal case 10 and the window portion 30 provided on the shield portion 23. it can. Therefore, the man-hours required for the connection work of the input side coaxial cable C1 can be reduced. Further, without using the F-type plug F, it is possible to surely suppress the radio wave leakage within the standard while ensuring the visibility of the pinched state of the core wire C1a.

In addition, the present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention. For example, in the above embodiment, the TV outlet 1 that supplies the antenna reception signal to the TV receiver has been described as an example, but if the device is a device that processes high frequency signals by connecting two coaxial cables, various coaxials are used. It can be applied to cable connectors.

Further, in the above embodiment, the window portion 30 is opened inside the housing 2 when the lid material 3 is closed, but for example, when the lid material 3 is closed, the window portion 30 faces the window portion 30 of the lid material 3. A convex portion that closes the window portion 30 may be provided at the position. As a result, the convex portion functions as a lid of the window portion 30, and radio wave leakage from the window portion 30 can be suppressed more reliably. In this case, since the radio wave leakage is suppressed by the convex portion, the window portion 30 can be enlarged to improve the visibility of the core wire C1a. Further, in the above embodiment, the window portion 30 is formed as an opening, but the window portion 30 may be sealed with a transparent material. As a result, a dustproof effect can be obtained, and poor contact due to dust or the like can be prevented.

The present invention can be used for a coaxial cable connector for connecting two coaxial cables, such as a television outlet that supplies an antenna reception signal to a television receiver.

1 TV outlet (coaxial cable connector)
2 Housing 2a Opening 3 Lid material 3a Support shaft 3b Notch 3c Lid material side rib 4 Terminal cover 6 Mounting shaft 10 Terminal case 10a 1st accommodating part 10b 2nd accommodating part 12 1st insertion hole 13 2nd insertion hole 20 Terminal plate 22 Communication part 23 Shield part 23a Cable insertion hole 23b Conductive rib 27 Retaining rib 30 Window part 40 Screw C1 Input side coaxial cable C1a Core wire (input side coaxial cable)
C1b External conductor C2 Output side coaxial cable C2a Core wire (output side coaxial cable)

Claims (5)

A metal housing with an opening on one side,
A terminal fitting having a first spring piece that sandwiches the core wire of the input side coaxial cable and a second spring piece that sandwiches the core wire of the F-type plug attached to the output side coaxial cable.
A terminal case disposed in the housing and having an insertion hole for accommodating the terminal fitting and inserting the core wire of the input side coaxial cable.
The metal terminal plate to which the terminal case is mounted and
A metal lid material that can open and close the opening of the housing,
In a coaxial cable connector equipped with
The terminal plate has a tubular shape with one end sealed , and includes a shield portion for inserting the input side coaxial cable and covering a portion of the terminal case in which the first spring piece is housed .
The terminal case is made of a transparent resin material, and the shield portion has a window portion formed at a position facing the first spring piece.
A coaxial cable connector characterized in that the first spring piece can be visually recognized from the outside of the shield portion via the terminal case and the window portion . The coaxial cable connector according to claim 1, wherein the shield portion has a circular cable insertion hole, and the insertion hole and the first spring piece are located on a straight line passing through the center of the cable insertion hole. .. The coaxial cable connector according to claim 2, wherein a conductive rib that contacts the outer conductor of the input-side coaxial cable is formed on the inner peripheral surface of the cable insertion hole. The terminal case is composed of a first accommodating portion for accommodating the first spring one side of the terminal fitting and a second accommodating portion accommodating the second spring one side of the terminal fitting.
The terminal plate includes a communication portion that projects the first accommodating portion to the opposite side of the second accommodating portion with the terminal plate interposed therebetween, and a shield portion that covers the first accommodating portion that protrudes from the communication portion. a coaxial cable connector as defined in any one of claims 1 to 3, characterized in that it has a. The lid material is rotatably supported by one side edge of the opening of the housing.
The lid material and the terminal plate are characterized in that a lid side rib and a retaining rib that sandwich the outer peripheral surface of the input side coaxial cable are formed when the lid material is in a position to close the opening. The coaxial cable connector according to any one of claims 1 to 4.

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