JP4233696B2 - connector - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a connector for connecting a coaxial cable, and particularly relates to a connector incorporating a dummy resistor.
[0002]
[Prior art]
For example, in a home where a joint reception system is introduced, television terminals for connecting to a television receiver may be provided in a plurality of rooms. In some cases, the television receiver is not connected to all the television terminals in the plurality of rooms, and an unused television terminal is generated. At this time, noise from an unused TV terminal may enter the joint reception system and affect the screens of other TV receivers in the home. Alternatively, if the television terminal is left unused, the VSWR of the television signal transmitted through the joint reception system is deteriorated. Therefore, the core wire of the unused TV terminal is connected to the ground side via a dummy resistor.
[0003]
However, it is troublesome to connect the dummy resistors to unused TV terminals one by one, and the dummy resistors must be removed when using the TV terminals. Japanese Patent Application Laid-Open No. 60-182678 discloses a connector in which a dummy resistor is detachably incorporated. When this connector is connected to an unused TV terminal with the dummy resistor connected in this connector, the dummy resistor is connected to the TV terminal, and the above-described problems are solved.
[0004]
[Problems to be solved by the invention]
However, when a coaxial cable is connected to this connector and this connector is connected to a television terminal, the dummy resistor must be manually removed from the connector, which is troublesome. For example, Japanese Patent Laid-Open No. 63-4579 discloses a dummy resistor provided in a connector that is automatically attached and detached. However, this connector is configured such that the dummy resistor is automatically detached when connected to the antenna terminal of the television receiver. Therefore, in a state where this connector is connected to the television terminal, the dummy resistor is not connected to the television terminal.
[0005]
The present invention can connect a dummy resistor to a TV terminal when connected to a TV terminal without connecting a coaxial cable, and a connector that can be normally used when connected to a TV terminal after connecting a coaxial cable. The purpose is to provide.
[0006]
[Means for Solving the Problems]
1st aspect of this invention is a connector connected to a television terminal, Comprising: As with a normal connector, the electroconductive core wire connection part which can connect the core wire of a coaxial cable, and this core wire connection part And a conductive outer conductor connecting portion to which the outer conductor of the coaxial cable can be connected. One end of a dummy resistor is connected to the core wire connection portion. A conductive contact member is provided for bringing the other end of the dummy resistor and the external conductor connection portion into a contact state and a non-contact state. This contact member can be selectively varied between a first state where the operating point contacts the other end of the dummy resistor and a second state where the operating point does not contact the other end of the dummy resistor. Further, a fulcrum is supported by the outer conductor connecting portion. A bias member for holding the contact member is provided in the first state. Furthermore, when the outer conductor of the coaxial cable is connected to the outer conductor connecting portion, the contact member is given a force that causes the contact member to change to the second state against the bias by the bias member. Power points are provided.
[0007]
With this configuration, when the connector is connected to the TV terminal without connecting the coaxial cable to this connector, the dummy resistor is connected between the core wire connecting portion and the external conductor connecting portion. Then, the dummy resistor is connected to the TV terminal. On the other hand, when the outer conductor of the coaxial cable is connected to the outer conductor connecting portion of the connector, an acting force is applied to the force point of the contact member by the coaxial cable, the contact member changes to the second state, and the dummy resistor is externally connected. Detached from the conductor connection. Therefore, when this connector is connected to the TV terminal, there is no influence of the dummy resistor. In addition, it is not necessary to remove the dummy resistor from the connector. Further, removal of the coaxial cable from the connector, since the return to the first state again by the bias member, by connecting the connector to the television terminals, can be connected to the dummy resistor to the television terminal. Therefore, it is not necessary to connect the dummy resistor again to the external conductor connection portion and the core wire connection portion of the connector.
[0008]
The second aspect of the present invention has a conductive outer conductor connecting portion capable of connecting an outer conductor of a coaxial cable, and the outer conductor connecting portion includes a flat plate-like portion and an outer conductor holding portion. A hole is formed in the flat plate portion. The outer conductor holding portion is formed at the rear end of the flat plate-like portion. Moreover, the electroconductive core wire connection part is also provided. This is held by an insulator, and the distal end protrudes outward from the outer conductor connecting portion through the hole, and the core wire of the coaxial cable can be connected to the proximal end. A dummy resistor is provided in the insulator. One end of the dummy resistor is connected to the core wire connecting portion, and the other end is exposed on the opposite side of the insulator from the outer conductor holding portion. One end of the conductive contact member is in contact with the exposed end of the dummy resistor, the other end of the contact member is located on the outer conductor holding portion side, and when the coaxial cable is in contact with the other end, The middle part of the contact member is supported by the external conductor connecting portion so that the one end portion can be detached from the exposed end portion of the dummy resistor. When the coaxial cable is not in contact with the other end of the contact member, the bias means holds the state in which one end of the contact member is in contact with the dummy resistor.
[0009]
According to the second aspect of the present invention, the coaxial cable is not in contact with the other end portion of the contact member when the coaxial cable is not attached to the outer conductor holding portion. At this time, one end of the contact member is in contact with the exposed end of the dummy resistor, and the middle of the contact member is supported by the outer conductor holding portion, so the dummy resistor is connected to the outer conductor connecting portion and the core wire connecting portion. Connected between and. When this connector is connected to the television terminal in this state, the dummy resistor can be connected to the television terminal. On the other hand, in a state where the outer conductor holding portion holds the outer conductor of the coaxial cable, the coaxial cable contacts the other end portion of the contact member, and one end portion of the contact member separates from the exposed end portion of the dummy resistor. In this state, when this connector is connected to the television terminal, the coaxial cable can be connected to the television terminal. At this time, it is not necessary to remove the dummy resistor from the connector. Further, when the outer conductor of the coaxial cable is removed from the outer conductor holding portion, the bias means brings one end portion of the contact member into contact with the exposed end portion of the dummy resistor. Accordingly, when the coaxial cable is removed from the connector and then connected to the TV terminal, the dummy resistor can be connected to the TV terminal again, and there is no need to connect the dummy resistor to the connector again.
[0010]
The contact member can be arranged such that its other end crosses the coaxial cable. If comprised in this way, the part which can contact a coaxial cable and a contact member will become large, and the one end part of a contact member can be reliably made to detach | leave from the exposed end part of a dummy resistor.
[0011]
In addition to this, the contact member can have an action member that connects one end and the other end of the contact member outside the insulator. In this case, the exposed end portion of the dummy resistor can be switched to a state where it is connected to the external conductor connection portion and a state where it is disconnected without using a large space.
[0012]
The bias means is biased toward the outer conductor holding portion side from the support position of the contact member to the outer conductor connecting portion at the bottom surface of the surrounding portion arranged so as to surround the outer conductor connecting portion from the lower side . A pressing member that protrudes upward at a position and an elastic member that is provided integrally with the contact member and is pressed upward by the pressing member.
[0013]
With this configuration, when the elastic member is pressed by the pressing member, one end of the contact member rotates toward the exposed end of the dummy resistor, and one end of the contact member becomes the exposed end of the dummy resistor. Maintain contact. Since the elastic member is provided in the contact member and the pressing member is also provided in the accommodating portion, the number of parts can be reduced.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
As shown in FIG. 1, the connector according to one embodiment of the present invention includes an outer conductor connecting portion 2, a core wire connecting portion 4, a dummy resistor 6, and a contact member 8.
[0015]
The outer conductor connecting portion 2 has a flat plate portion 10 made of a conductive material, for example, a conductive metal. The flat plate-like portion 10 is formed in a substantially rectangular shape, and has a circular hole 12 penetrating in the thickness direction at the center thereof. On the back side of the flat plate-like portion 10, a conductive cylindrical portion, for example, a cylindrical portion 14 is formed integrally with the flat plate-like portion 10 so as to surround the circular hole 12. Side walls 16 and 18 are formed on both long edge portions of the flat plate portion 10 so as to protrude upward so as to face each other. A conductive outer conductor holding portion 20 is formed integrally with the short edge portion, for example, the rear end portion, of the flat plate portion 10. The outer conductor holding portion 20 is formed in a generally U shape so as to grip the outer conductor of the coaxial cable introduced into the inner portion from the lower side of both sides, and the upper end portion engages with the outer conductor. A large number of nails are formed.
[0016]
The outer conductor connecting portion 2 is accommodated in a lower accommodating portion 24 that forms the lower half of the case 22. The lower housing portion 24 is obtained by dividing the rectangular parallelepiped case 22 along a horizontal plane along the length direction at substantially the center in the height direction. A circular hole 26 having a diameter substantially equal to the diameter of the cylindrical portion 14 is bored in the bottom surface of the lower housing portion 24, and the cylindrical portion 14 is inserted into the inside of the circular hole 26, and is lower than the bottom surface of the lower housing portion 24. A cylindrical portion 14 protrudes downward. A semicircular hole 28 for inserting a coaxial cable is formed in the rear wall portion of the lower housing portion 24.
[0017]
The core wire connection portion 4 is formed in a pin shape made of a conductive material, for example, a conductive metal. The core wire connecting portion 4 is inserted through the insulator 30 in the vertical direction, and the tip portion protrudes further downward from the insulator 30. The insulator 30 has a cylindrical portion 32 on its lower surface. By inserting the cylindrical portion 32 into the circular hole 12, the tip of the core wire connecting portion 4 is disposed in the cylindrical portion 14 concentrically with the cylindrical portion 14. The base end 4 a of the core wire connecting portion 4 is formed in a flat plate shape and is in contact with the upper wall of the insulator 30. The metal fitting 36 comes into contact with the upper surface of the base end 4 a of the core wire connecting portion 4 by being inserted into the screw 34 and being fixed to the insulator 30. A core wire of the coaxial cable is fixed between the metal fitting 36 and the upper surface of the base end 4 a of the core wire connecting portion 4.
[0018]
The dummy resistor 6 is installed in the insulator 30. That is, the dummy resistor 6 is inserted into the insulator 30 along the length direction of the flat plate-like portion 10. The end of the dummy resistor 6 on the outer conductor holding portion 20 side is bent in a U-shape, and the tip thereof contacts the back surface side of the base end 4a of the core wire connecting portion 4 on the upper wall of the insulator 30. is doing. The other end of the dummy resistor 6 is exposed from the insulator 30. That is, an overhang portion 38 is formed on the peripheral surface of the insulator 30. A minute recess 40 is formed on the opposite side of the overhanging portion 38 from the outer conductor holding portion 20, and the other end of the dummy resistor 6 is exposed on the recess 40.
[0019]
The contact member 8 is made of a conductive material, for example, a conductive metal, and is disposed between the side walls 16 and 18 of the outer conductor connecting portion 2 so as to surround the periphery of the insulator 30. The contact member 8 has action members, for example, long portions 42 and 44, which are positioned in parallel with and close to the side walls 16 and 18, respectively. Recesses 46 and 48 are formed on the surface of the long portions 42 and 44 facing the side walls 16 and 18 in the middle. The recesses 46 and 48 are inserted into protrusions 50 and 52 formed integrally with the side walls 16 and 18 on the inner surface side. As a result, the contact member 8 is rotatable about the protrusions 50 and 52 as fulcrums.
[0020]
In a state where the long portions 42 and 44 are substantially horizontal, the front end portions of the long portions 42 and 44 are located up to the vicinity of the concave portion 40 of the insulator 30. The end portions of the long portions 42 and 44 are connected to each other substantially perpendicularly, that is, as shown in FIG. 2B, so as to contact the exposed end portion of the dummy resistor 6 on the recess 40. The action piece portion 54 extends downward.
[0021]
Similarly, as shown in FIGS. 2A and 2B, the rear end portions of the long portions 42 and 44 pass through both sides of the outer conductor holding portion 20 and project rearward from the outer conductor holding portion 20. ing. The force point piece 56 extends downward so as to connect the rear end portions perpendicularly thereto, that is, across the outer conductor holding portion 20. Therefore, when the outer conductor of the coaxial cable is fixed to the outer conductor holding part 20, the force point piece 56 is pushed downward, the contact member 8 rotates with the recesses 46 and 48 as fulcrums, and the action piece 54 becomes the dummy resistance. Separate from the exposed end of the vessel 6. Note that the lengths of the long portions 42 and 44 are selected so that the force point piece 56 does not contact the outer conductor holding part 20 when the force point piece 56 is pushed downward in this way.
[0022]
An elastic member, for example, a leaf spring 58, 60 is provided from the vicinity of the recesses 46, 48 in the upper edge of the long portions 42, 44 toward the force point piece 56 side along the length direction of the long portions 42, 44. The long portions 42 and 44 are integrally formed. In order to press these plate springs 58 and 60 from below to above, the bottom surface of the lower housing portion 24 is integrally formed with the plate springs 58 and 60 so as to correspond to the plate springs 58 and 60, and a pressing member such as a columnar protrusion. 62 and 64 are formed. Of course, the protrusions 62 and 64 are located on both sides of the insulator 30.
[0023]
Since the leaf springs 58 and 60 are pressed by the protrusions 62 and 64 in this way, the action piece 54 of the contact member 8 is firmly attached to the exposed end of the dummy resistor 6 as shown in FIG. It is pressed. That is, the contact member 8 is biased downward by the leaf springs 58 and 60 and the protrusions 62 and 64.
[0024]
Note that an upper housing portion 66 is disposed on the upper side of the lower housing portion 24 so as to surround the insulator 30 and the core wire connecting portion 4. The upper and lower accommodating portions 24 and 66 constitute a case 22. A semicircular hole 68 for inserting a coaxial cable is also formed in the upper housing portion 66 corresponding to the semicircular hole 28.
[0025]
Since the contact member 8 and the outer conductor connecting portion 2 are also conductive, when the exposed end portion of the dummy resistor 6 is in contact with the contact member 8 as shown in FIG. Are connected between the core wire connecting portion 4 and the outer conductor connecting portion 2. When this connector is connected to the TV terminal, the center conductor of the TV terminal is in contact with the core wire connecting portion 4 and the outer conductor of the TV terminal is in contact with the outer conductor connecting portion 2, so that the dummy resistor 6 is the center of the TV terminal. Connected between the conductor and the outer conductor. Therefore, a dummy resistor can be connected to the television terminal by connecting this connector with the coaxial cable not connected to the television terminal.
[0026]
Further, as shown in FIG. 2 (c), a coaxial cable core 70 is connected between the base end 4a of the connector 4 of the connector and the metal fitting 36, and an outer conductor 72 of the coaxial cable is connected. In the state of being held by the outer conductor holding portion 20, the outer conductor 72 of the coaxial cable comes into contact with the force point piece portion 56 of the contact member 8, and the force point piece portion 56 resists the acting force of the leaf springs 58 and 60. It is pushed down. Therefore, the action piece portion 54 is detached from the exposed end portion of the dummy resistor 6. When this connector is connected to the television terminal in this state, the core wire connecting portion 4 is connected to the central conductor of the television terminal, and the external conductor connecting portion 2 is connected to the external conductor of the television terminal. Since the force point piece 56 is provided in a direction crossing the outer conductor of the coaxial cable, the contact area between the force point piece 56 and the outer conductor of the coaxial cable is large, and the contact member 8 is reliably rotated downward. Can do.
[0027]
When the coaxial cable is removed from this connector, the action piece 54 of the contact member 8 comes into contact with the exposed end of the dummy resistor 6 again. Therefore, when this connector with the coaxial cable removed is connected to the TV terminal again, the dummy resistor 6 is connected to the TV terminal.
[0028]
Incidentally, a connector having a built-in dummy resistor and connecting or disconnecting the dummy resistor between the core wire connecting portion and the external conductor connecting portion of this connector is disclosed in, for example, Japanese Patent Laid-Open No. 63-4579. It is disclosed in the publication. However, the connector of this publication is for an outlet for connecting a coaxial cable connected to a TV terminal or the like to an antenna outlet of a television receiver, and the dummy resistor without the connector being connected to the antenna outlet. The dummy resistor is disconnected from between the core wire connection portion and the external conductor connection portion in a state where the connector is connected to the core wire connection portion and the external conductor connection portion and the connector is connected to the antenna outlet. Therefore, this outlet cannot be used for a television terminal. On the other hand, in the connector of this embodiment, the dummy resistor 6 is connected or disconnected depending on whether or not the coaxial cable is connected, so that it is connected to the TV terminal without being connected to the coaxial cable. By doing so, a dummy resistor can be connected to the TV terminal.
[0029]
A frame-like contact member 8 is used for switching between contact and separation of the dummy resistor 6. The contact member 8 is disposed between the outer conductor connecting portion 2 and the core wire connecting portion 4 included in a normal connector, and does not occupy a large space. Therefore, since the dummy resistor 6 is connected and disconnected, the size of the connector does not increase.
[0030]
In the connector according to the above-described embodiment, the core wire connecting portion is a pin-shaped member, but a cylindrical member (receptable) that accommodates the pin-shaped member inside may also be used. In the connector of the above embodiment, the recesses 46 and 48 are formed in the long portions 42 and 44 and the protrusions 50 and 52 are formed on the side walls 16 and 18. The protrusions may be recessed in the side walls 16,18. In addition, the plate springs 58 and 60 are used as elastic means, but instead of this, a plate-like body having a large composition is provided, and the plate-like body is always located between the plate-like body and the bottom surface of the lower accommodating portion 24. You may provide an elastic body like the coil spring which presses to. The leaf springs 58 and 60 are formed from the recesses 46 and 48 toward the force point piece portion 56 side, but conversely, may be formed from the recesses 46 and 48 toward the action piece portion 54 side. In this case, the protrusion 62 may be provided in the upper housing portion 66 . Moreover, although the frame-shaped thing was used as the contact member 8, only any one of the elongate parts 42 and 44 can also be provided, for example. In this case, the length of the action piece portion 54 and the force point piece portion 56 may be the same as those shown in the embodiment or may be shortened.
[0031]
【The invention's effect】
As described above, according to the connector according to the present invention, when connected to the TV terminal without connecting the coaxial cable, the dummy resistor can be connected to the TV terminal, and the coaxial cable is connected to the TV terminal. Then, it can be used normally and there is no need to connect or disconnect the dummy resistor to the TV terminal.
[Brief description of the drawings]
FIG. 1 is an assembly view of an embodiment of a connector of the present invention.
2A is a plan view of the connector of FIG. 1, FIG. 2B is a longitudinal sectional view of the connector of FIG. 1 in which the coaxial cable is not connected, and FIG. 2C is the coaxial cable of the connector of FIG. It is a longitudinal cross-sectional view of the connected state.
[Explanation of symbols]
2 External conductor connection portion 4 Core wire connection portion 6 Dummy resistor 8 Contact member 58 60 Leaf spring (bias means)
62 64 protrusion (bias means)

Claims (5)

A connector connected to a TV terminal,
A conductive core connecting portion to which the core of the coaxial cable can be connected;
A conductive outer conductor connecting portion that is insulated from the core wire connecting portion and to which the outer conductor of the coaxial cable can be connected;
A dummy resistor having one end connected to the core wire connection portion;
The outer conductor can be selectively varied between a first state in which an operating point is in contact with the other end of the dummy resistor and a second state in which the operating point is not in contact with the other end of the dummy resistor. A conductive contact member whose fulcrum is supported by the connecting portion;
A bias member for biasing the contact member in a first state,
When the outer conductor of the coaxial cable is connected to the outer conductor connecting portion, the contact member has a force point to which a force for changing the contact member to the second state against the bias by the bias member is applied. Having connector. A conductive outer conductor connecting portion having a flat plate portion in which a hole is formed and an outer conductor holding portion formed at the rear end portion of the flat plate portion and capable of holding the outer conductor of the coaxial cable;
A conductive core wire connection portion that is held by an insulator, protrudes outward from the outer conductor connection portion through the hole, and is connectable to the core wire of the coaxial cable at the base end;
A dummy resistor provided in the insulator, having one end connected to the core wire connection portion and the other end exposed on the opposite side of the insulator from the outer conductor holding portion;
One end is in contact with the exposed end of the dummy resistor, the other end is positioned on the outer conductor holding portion side, and the one end is detached from the exposed end when the coaxial cable is in contact with the other end. Possiblely, a conductive contact member whose middle is supported by the outer conductor connecting portion,
Biasing means for holding the one end of the contact member in contact with the dummy resistor when the coaxial cable is not in contact with the other end of the contact member;
Connector provided.   The connector according to claim 2, wherein the contact member is disposed such that the other end crosses the coaxial cable.   The connector according to claim 3, wherein the contact member has an action member that connects one end and the other end of the contact member outside the insulator. 3. The connector according to claim 2, wherein the biasing means is
In the bottom surface of the surrounding part arranged so as to surround the outer conductor connecting part from the lower side, in a position biased to the outer conductor holding part side than the support position to the outer conductor connecting part of the contact member, A pressing member that protrudes upward;
An elastic member provided integrally with the contact member and pressed upward by the pressing member ;
Having connector.

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