JPH0998013A - Coaxial feeder cable plug - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a coaxial feeder cable plug which can be produced with no defect caused by soldering, with high productivity and at low cost and also can maintain its rated function for a long period of time. SOLUTION: A plug pin 10 has an insertion part 14 including a core wire holding part 11 which can hold a core wire 1 that undergone the terminal machining of a coaxial feeder cable 5 with the prescribed pressure. Then the pin 10 attached at the terminal of the cable 5 is horizontally inserted into a 1st gutter-shaped body of a cylindrical base, and both 1st and 2nd gutter-shaped bodies are closed. Then the pin 10 is immovably held in its lengthwise direction, and at the same time a holder piece 11a is pressed to a holder piece 11b and therefore the wire 1 is held with pressure. Thus an insulated cylindrical body 20 can lead the end part of a shield wire 3 of the cable 5 to its outside through a slit 26. A ground cylindrical body 30 is fixed at the outer circumference of the body 20 to secure conduction with the wire 3 on the inner circumference surface and also grounded via the ground elastic contact pieces 31 and 32 which are protruded over the outer circumference surface of the body 20.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plug for connecting a cable, which is attached to an end of a coaxial type power supply cable which is connected to, for example, an automobile antenna.

[0002]

2. Description of the Related Art FIG. 4 is a view showing the structure of a conventionally known coaxial type power feeding cable plug of this type. FIG.
As shown in FIG. 3, this plug comprises an insulating cylinder 40, an earth spring 50, and a plug tip assembly 60.

The insulating tubular body 40 is a member that serves as a base body for being fitted and fixed to the outer periphery of one end of the coaxial power supply cable 5,
It has a small diameter portion 41 at its tip and a claw 42 at the inner circumference of the base end.

The earth spring 50 is made of an elastic metal material such as phosphor bronze, and has a pair of elastic contact pieces 51, 5 for grounding which are curved so that the central portion bulges outward.
2, and connection pieces 53 and 54 are provided at the base end portions thereof. Thus, the earth spring 50 crimps the connecting pieces 53, 54 to the outer circumference of the coaxial type power supply cable 5 so as to hold the exposed outer circumference of the shield wire (braided wire) 3 and solders the H1 portion. By doing so, it is attached to the coaxial power supply cable 5.

The plug chip assembly 60 is formed by implanting a plug pin 61 made of a metal material having excellent conductivity such as brass at the tip of a molded insulating cylinder 62. Slits 64, 65 for exposing the grounding elastic contact pieces 51, 52 of the earth spring 50 to the outside are provided in the middle part of the insulating cylinder 62. Thus, this plug tip assembly 60
The core wire 1 penetrates the hollow portion of the plug pin 61 to project to the outside, and the ground elastic contact pieces 51 of the earth spring 50 from the slits 64 and 65.
52 is exposed to the outside, the base end portion is the insulating cylinder 4
By press-fitting into the small diameter portion 41 of 0, it is connected and integrated with the insulating tubular body 40. The H2 portion between the tip portion of the plug pin 61 and the core wire 1 penetrating the inside of the plug pin hollow portion is
The insulating cylindrical body 40 and the plug chip assembly 60 are soldered in a state of being positioned at predetermined positions.

[0006]

The above-mentioned conventional coaxial plug for power feeding cable has the following drawbacks. Since the H2 portion between the core wire 1 and the plug pin 61 needs to be soldered at the tip end portion of the plug pin 61, if insufficient solder sucking into this portion occurs, there is a risk of poor conduction between the core wire 1 and the plug pin 61. There is. In addition, the solder may enter the constricted portion 63 at the tip of the plug pin 61, which may deteriorate the quality. Since the soldered H2 portion cannot be visually inspected from the outside, there is an inconvenience that the quality cannot be confirmed at the manufacturing stage. Further, the heat at the time of soldering may melt and deform the tip portion of the insulating cylindrical body 62 in which the plug pin 61 is implanted. Further shielded wire 3
Since it is also necessary to solder the connection pieces 53, 54 to the outer insulation layer 4 and the inner insulation layer 2 of the coaxial power supply cable 5, there is a risk that insulation failure will occur. Moreover, since the number of processing steps is large, there is a drawback that it cannot be manufactured at low cost.

An object of the present invention is to provide the following plug for coaxial type power feeding cable. (a) A plug for a coaxial power supply cable that does not require soldering, and does not cause poor continuity due to poor soldering, poor insulation of the coaxial cable due to heat deformation, and poor appearance.

(B) A plug for a coaxial type power feeding cable which has a small number of processing steps, is excellent in productivity, and can be manufactured at low cost. (c) A plug for coaxial type power feeding cable that has a simple structure and can sufficiently and stably exhibit required functions over a long period of time.

[0009]

In order to solve the above problems and achieve the object, the present invention uses the following means. (1) A plug for a coaxial power feeding cable according to the present invention includes a plug pin having a plug portion having a core wire holding portion capable of holding a terminal wire of the coaxial power feeding cable subjected to a terminal process, and a tubular substrate. Insert the plug pin attached to the end of the coaxial type power supply cable into the first gutter-shaped body of
By joining the opening of the second gutter of the tubular base body to the opening of the first gutter and closing the two,
The plug pin is held so as not to move at least in the longitudinal direction, and one holding piece of the core wire holding portion is pressed toward the other holding piece to hold the core wire while holding the core wire, and the coaxial feed cable. And an insulating cylindrical body provided so that the end of the shielded wire is led out of the cylindrical body through a slit, and is fitted and fixed to the outer circumference of the insulating cylindrical body so that the inner peripheral surface conducts the shielded wire and the outer circumference. A grounding cylindrical body is provided for grounding via a grounding elastic contact piece projecting from the surface. (2) The coaxial type power supply cable plug of the present invention is the plug according to (1) above, wherein the insulating cylinder is the first
When the opening of the second gutter is joined to the opening of the gutter and both are closed, both the plug pin and the coaxial power supply cable are engaged, and the plug pin and the coaxial power supply cable are connected. And means for immobilizing the two so that they do not move relative to each other in the longitudinal direction.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION

(First Embodiment) FIG. 1 is a sectional view showing a structure of a coaxial type power supply cable plug according to a first embodiment of the present invention.
2 (a) (b) (c) and FIG. 3 (a) (b).
(C) is process explanatory drawing which shows the assembly procedure of the said plug for coaxial type power supply cables.

As shown in FIGS. 1 to 3, a terminal portion to which the plug of the coaxial power supply cable 5 is mounted is end-processed. 1 is a core wire, 2 is an internal insulating layer, 3
Is a shield wire (braided wire), and 4 is an external insulating layer.

The coaxial power supply cable plug comprises a plug pin 10, an insulating tubular body 20, and a grounding tubular body 30. The plug pin 10 is integrally formed of an elastic conductive material, and allows the insertion of the core wire 1 on which the terminal processing of the coaxial type power supply cable 5 is applied, on the base end side thereof.
Further, the core wire holding portion 1 including a pair of elastic holding pieces 11a and 11b provided so as to be able to hold the core wire 1 at a predetermined pressure.
1 is provided. One elastic holding piece 11a is bent and formed in a dogleg shape, and the peak apex Q of the dogleg portion can contact the flat surface of the other elastic holding piece 11b. At the base end of the plug pin 10, the outer periphery of the inner insulating layer 2 in the coaxial type power supply cable 5 can be held.
A cable holding portion 12 including a pair of holding portion pieces 12a and 12b is provided. The pair of holding portion pieces 12a and 12b of the cable holding portion 12 are crimped on the outer periphery of the inner insulating layer 2 so as to hold the outer periphery of the inner insulating layer 2 sufficiently strongly. Has become. At the tip end portion of the plug pin 10, there is provided an insertion portion 14 as a conduction terminal having an annular protrusion 13 on the outer peripheral surface for preventing the plug pin 10 from moving at least in the longitudinal direction.

The insulating tubular body 20 is integrally formed of an insulating material, and has a first gutter-shaped body 21 and a second gutter-shaped body 22 in which the tubular body is roughly divided into two along the axis. Is mainly formed of a tubular base body which is connected so as to be openable and closable around a hinge portion h provided between end edges along the longitudinal direction. A ring-shaped base portion 20a is provided at the end of the first gutter 21.
Are formed.

An annular groove 23 is formed along the inner peripheral surfaces of the first gutter 21 and the second gutter 22 of the tubular base body.
Is provided. The annular groove 23 is inserted into the first gutter 21 with the plug pin 10 attached to the end of the coaxial power supply cable 5 lying down.
When the opening of the second gutter 22 is joined to the opening of the plug and the both are closed, it is engaged with the annular projection 13 and prevents the plug pin 10 from moving at least in the longitudinal direction. It is provided as follows. Reference numeral 24 is a tip opening.

A support projection 25 is formed on the inner peripheral surface of the first gutter 21.
b is provided, and a pressing protrusion 25a is provided on the inner peripheral surface of the second gutter 22. When the first gutter 21 and the second gutter 22 are closed, the pressing protrusion 25a and the support protrusion 25b hold one of the holding pieces 1 of the core wire holding portion 11.
The pressing portion 1a is pressed against the other holding piece 11b to form a pressing portion for holding the core wire 1 while holding it.

On the inner peripheral surface of the first gutter 21 is provided a protrusion X which is an arc-shaped protrusion protruding in a mountain shape. Second
The inner peripheral surface of the gutter 22 is provided with protrusions Y and Z, which are also arc-shaped protrusions protruding in a mountain shape. The protrusions Y and Z are provided at positions that are slightly deviated in the plus and minus directions in the axial direction about the position where the protrusion X is provided. These protrusions X, Y,
When the first gutter 21 and the second gutter 22 are closed, Z digs into the surface of the outer insulating layer 4 of the coaxial power supply cable 5, and the coaxial power supply cable 5 moves in the longitudinal direction. It is to prevent the movement of.

The function of preventing the positional deviation of the coaxial power supply cable 5 in the longitudinal direction by the projections X, Y, Z and the engagement of the annular projection 13 and the annular recess 23 with the plug pin 1
The function of 0 for preventing the positional deviation in the longitudinal direction is all exerted through the insulating cylindrical body 20, and both of them are arranged so that the plug pin 10 and the coaxial power supply cable 5 do not move relatively in the longitudinal direction. Immobilizing means for immobilizing the.

A shield wire lead-out slit 26 is provided on a part of the peripheral wall of the first gutter 21 in the tubular base body. The shield wire lead-out slit 26 has a first
When the gutter-shaped body 21 and the second gutter-shaped body 22 are closed, the end of the shielded wire 3 in the coaxial power supply cable 5 can be led out to the outside of the tubular base body.

The first gutter 21 and the second gutter 22
Ring caulking annular grooves 27 and 28 are provided on the outer periphery of the. A grounding cylinder 30 is fitted and fixed to the outer periphery of the insulating cylinder 20. The grounding cylinder 30 is integrally formed of a conductive member, and a pair of grounding elastic contact pieces 3 are previously formed on the outer peripheral surface of the conductive cylinder.
1, 32 are projected. Then, the two locations 33, 34 of the peripheral wall of the conductive tubular body fitted on the outer circumference of the insulating tubular body 20 are connected to the ring groove ring 27, 28 for ring crimping of the insulating tubular body 20.
By caulking against, the earth cylinder 30
Is fixed to the insulating cylindrical body 20.

Next, a procedure for assembling the plug for the coaxial type power feeding cable shown in the first embodiment will be briefly described with reference to FIGS. 2 and 3. As shown in (a) of FIG. 2, first, the coaxial feed cable 5 subjected to the terminal processing is passed through the base end opening 29 provided in the ring-shaped base portion 20a of the insulating tubular body 20 to thereby insulate the insulating tubular body 20. Is fitted on the outer circumference of the coaxial power feeding cable 5. At this time, the first gutter 21
The second gutter 22 is left open.

As shown by the arrow in FIG. 2B, the core wire 1 of the coaxial power feeding cable 5 is connected to the core wire holding portion 1 of the plug pin 10.
1 is inserted between the holding pieces 11a and 11b. Then, the holding pieces 12a, 12b of the cable holding portion 12 of the plug pin 10 are caulked on the outer circumference of the inner insulating layer 2 of the coaxial power supply cable 5 so as to be fixed to the outer circumference of the inner insulating layer 2.

FIG. 2C shows the appearance of the connecting portion between the coaxial feed cable 5 and the plug pin 10 obtained as a result of the above-mentioned assembly work. As shown in (a) of FIG. 3, the insulating tubular body 20 first fitted into the coaxial power feeding cable 5
Is moved to the connecting portion between the plug pin 10 and the coaxial power supply cable 5, and the plug pin 10 is moved to the first gutter-shaped body 2 of the insulating cylinder 20.
Lay into 1 and insert. At this time, the shielded wire 3 is led out from the shielded wire leading slit 26 to the outside of the cylindrical body. The opening of the second gutter 22 is joined to the opening of the first gutter 21 so that both are closed.

By doing so, the pressing projection 25a comes into contact with the tip portion P of the holding piece 11a and presses the holding piece 11a toward the holding piece 11b. Therefore, the peak 1 of the dogleg portion of the holding piece 11a and the flat surface of the holding piece 11b hold the core wire 1 with a strong force. Therefore, the core wire 1 and the plug pin 10 are electrically connected to each other with a small contact resistance. Further, the annular projection 13 and the annular recess 23 engage with each other, and the projections X, Y, and Z bite into the outer insulating layer 4 of the coaxial power feeding cable 5. Therefore, both the plug pin 10 and the coaxial power supply cable 5 are locked together by the insulating tubular body 20, and the plug pin 10 and the coaxial power supply cable 5 are fixed so that they do not move relatively in the longitudinal direction. .

As shown in FIG. 3B, the insulating cylindrical body 20
The grounding cylinder 30 is fitted on the outer periphery of the ring, and its peripheral wall is caulked with the ring caulking annular grooves 27, 28.
At this time, the shielded wire 3 is strongly held between the outer peripheral surface of the insulating tubular body 20 and the caulking portion of the grounding tubular body 30 and is in a conductive state.

FIG. 3C shows the appearance of the coaxial power supply cable plug obtained as a result of the assembling work. Reference numerals 34 and 33 denote ring crimping portions. (Modification) The coaxial power supply cable plug shown in the embodiment includes the following modifications.・ Core wire holding part 1
1, cable holding portion 12, annular projection portion 13, insertion portion 1
At least a part of 4 is formed in advance by separate members (for example, the core wire holding portion 11 is an elastic metal member, the cable holding portion 12 is a plastically deformable member suitable for caulking), and they are integrated as a plug pin 10. Combined with each other.
-The projections X, Y, Z are formed by an assembly of many minute projections.

(Summary of Embodiments) The following is a summary of the configuration and operational effects of the coaxial feed cable plug shown in the embodiments. [1] The coaxial feed cable plug shown in the embodiment is a core wire 1 obtained by processing the end of the coaxial feed cable 5.
A plug pin 10 provided with an insertion portion 14 having a core wire holding portion 11 that can be held at a predetermined pressure, and a plug pin 10 attached to an end of the coaxial power supply cable 5 in a first gutter 21 of a tubular base. The plug pin 10 is at least lengthened by laying it in sideways and joining the opening of the first gutter 21 with the opening of the second gutter 22 of the tubular base body to close them. It is held so as not to move in the direction, and one of the holding pieces 1 of the core holding portion 11 is held.
1a is pressed against the other holding piece 11b to hold the core wire 1 while holding the core wire 1 and the end portion of the shield wire 3 of the coaxial power supply cable 5 is led out to the outside of the cylinder through the slit 26. Insulation cylinder 20 and this insulation cylinder 2
For grounding, it is fitted and fixed to the outer periphery of No. 0, conducts with the shielded wire 3 on the inner peripheral surface, and is grounded through elastic contact pieces 31 and 32 for grounding projecting on the outer peripheral surface. The cylinder 30 is provided.

In the above coaxial power supply cable plug, since the core wire 1 and the shield wire 3 of the cable 5 are both electrically connected by a mechanical holding force, it is necessary to solder them. Not at all. Therefore, unlike the conventional case, there is no fear of defective conduction due to defective soldering. In addition, the insulating material is melted by the heat received when soldering is performed, and as a result, there is no possibility of causing insulation failure or appearance failure of the coaxial power supply cable 5.

On the other hand, when assembling the plug for the coaxial type power supply cable, it is only necessary to fit the parts or to perform caulking, and the number of processing steps is small. Therefore, it has excellent productivity and can be manufactured at low cost. [2] The plug for the coaxial type power supply cable shown in the embodiment is the plug according to the above [1], and the insulating cylindrical body 20 has a second gutter shape in the opening of the first gutter-shaped body 21. When the openings of the body 22 are joined and both are closed, both are engaged with both the plug pin 10 and the coaxial power supply cable 5,
The plug pin 10 and the coaxial power supply cable 5 are provided with a fixing means for fixing them so as not to move relative to each other in the longitudinal direction.

The coaxial type power supply cable plug has the same function and effect as the above [1], and the plug pin 10 and the coaxial type power supply cable 5 are stably and firmly integrated by the insulating cylinder 20. The required functions can be sufficiently and stably exhibited for a long period of time with a simple structure. [3] The coaxial type power feeding cable plug shown in the embodiment is the same as the coaxial type power feeding cable plug that is mounted on the end portion of the coaxial type power feeding cable 5 that has been processed. 5, a core wire holding portion 11 composed of a pair of elastic holding pieces 11a and 11b provided to allow the core wire 1 to be inserted thereinto and hold the core wire 1 at a predetermined pressure, and an internal insulation in the coaxial power supply cable 5. A cable holding portion 12 provided so as to be able to hold the outer periphery of the layer 2, and a plug-in portion 14 as a conduction terminal having at least an annular protrusion 13 on the outer peripheral surface so as to prevent movement in the longitudinal direction, A plug pin 10 integrally formed with an elastic conductive material, and a first gutter 21 and a second gutter 22 that form a cylindrical body divided into two along the axial center. Set up between departments And a tubular base body that is openably and closably connected around the hinge portion h, and the plug pin 10 attached to the end of the coaxial power supply cable 5 is laid in the first gutter body 21 of the tubular base body. In this state, when the opening of the second gutter 22 is joined to the opening of the first gutter 21 and both are closed, the annular ridge 1
3 is engaged with the plug pin 10 to prevent the plug pin 10 from moving at least in the longitudinal direction, and the annular groove portion is provided along the inner peripheral surfaces of the first gutter 21 and the second gutter 22. 23, and when the first gutter 21 and the second gutter 22 are closed as described above, one holding piece 11a of the core wire holding portion 11 is pressed against the other holding piece 11b. As described above, the supporting projections 25b and the pressing projections 25 are provided to face the inner peripheral surfaces of the first gutter 21 and the second gutter 22.
When the pressurizing section consisting of a and the first gutter 21 and the second gutter 22 are closed as described above, they bite into the surface of the outer insulating layer 4 of the coaxial power supply cable 5, Projections X, Y, Z provided along the inner peripheral surfaces of the first gutter 21 and the second gutter 22 so as to prevent movement of the coaxial power supply cable 5 in the longitudinal direction, As described above, when the first gutter 21 and the second gutter 22 are closed, the end portion of the shield wire 3 in the coaxial power supply cable 5 can be led out to the outside of the tubular base body. The shield wire lead-out slit 26 provided on the tubular substrate;
Insulation cylinder 20 integrally formed with ring caulking annular grooves 27, 28 provided on the outer circumferences of the gutter-shaped body 21 and the second gutter-shaped body 22, and an outer circumference of the insulation cylinder 20. And a conductive tubular body fixed to the insulating tubular body 20 by caulking the peripheral wall of the ring tubular ring grooves 27 and 28 for caulking of the insulating tubular body. It is provided with grounding elastic contact pieces 31 and 32 projectingly provided on the outer peripheral surface of the tubular body, and a grounding tubular body 30 integrally formed of a conductive member.

The coaxial type power supply cable plug has the same operational effect as the above [1], and has an advantage that it is extremely easy to implement because the embodying means is clearly specified.

[0031]

According to the present invention, it is possible to provide a plug for a coaxial type power supply cable which exhibits the following operational effects. (a) Since the core wire and the shield wire of the coaxial type power supply cable are both electrically connected by a mechanical holding force, there is no need to solder them. Therefore, unlike the conventional case, there is no fear of defective conduction due to defective soldering. Also, there is no fear that the insulating material is melted and deformed by the heat received when soldering is performed, and as a result, the occurrence of insulation failure or appearance failure of the coaxial cable is not caused.

(B) When assembling the plug for the coaxial type power feeding cable, it is sufficient to perform fitting of parts, caulking, etc., and the number of working steps is small. Therefore, it has excellent productivity and can be manufactured at low cost.

(C) Since the coaxial type power supply cable and the plug pin are stably and firmly integrated by the insulating cylinder, the required functions can be sufficiently stably exhibited for a long period of time with a simple structure. .

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing an overall configuration of a coaxial power supply cable plug according to a first embodiment of the present invention.

FIG. 2 is a process explanatory view showing the first half of the assembling procedure of the coaxial power supply cable plug according to the first embodiment of the present invention.

FIG. 3 is a process explanatory view showing the latter half of the assembling procedure of the coaxial power supply cable plug according to the first embodiment of the present invention.

FIG. 4 is a diagram showing a configuration of a coaxial power supply cable plug according to a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Plug pin 11 ... Core wire holding part 12 ... Cable holding part 13 ... Annular protrusion part 14 ... Insert part 20 ... Insulating cylinder 21 ... 1st gutter 22 ... 2nd gutter 23 ... Annular recess Part 24 ... Tip opening 25a ... Pressing projection 25b ... Supporting projection 26 ... Shield wire leading slit 27, 28 ... Ring caulking annular groove 29 ... Base end opening 30 ... Grounding cylinder 31, 32 ... Grounding elasticity Contact piece 33, 34 ... Caulking portion X, Y, Z ... Protrusion

Claims (2)

[Claims] Claim: What is claimed is: 1. A plug pin having an insertion portion having a core wire holding portion capable of holding a terminal wire of a coaxial type power supply cable with a predetermined pressure, and a coaxial plug in a first gutter-shaped body of a tubular base body. First, insert the plug pin attached to the end of
The plug pin is held so as not to move at least in the longitudinal direction by joining the opening of the second gutter of the tubular base body to the opening of the gutter to close the two. Provided so as to hold the clamping force of the core wire by pressing one holding piece of the core wire holding portion toward the other holding piece and to lead the shield wire end of the coaxial type power supply cable to the outside of the cylinder through the slit. The insulating cylindrical body is fitted and fixed to the outer periphery of the insulating cylindrical body to establish electrical continuity with the shield wire on the inner peripheral surface, and to ground via the elastic contact piece for grounding provided on the outer peripheral surface. A coaxial type power supply cable plug, comprising: a grounding cylinder that is designed to perform. 2. The insulating cylinder body, when the opening portion of the second gutter-shaped body is joined to the opening portion of the first gutter-shaped body and both are closed,
It is characterized by comprising fixing means which engages with both of the plug pin and the coaxial power feeding cable, and fixes both of them so that the plug pin and the coaxial power feeding cable do not move relative to each other in the longitudinal direction. The coaxial type power supply cable plug according to claim 1.