JPH0145184B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a terminal wire connection structure for connecting a coaxial cord to the terminals of various wiring devices such as plugs, jacks, and connectors.

(Prior Art) Conventionally, the method of connecting a coaxial cord to the terminals of various wiring devices such as plugs, jacks, and connectors is to remove the outer and inner sheaths of the coaxial cord to expose the outer conductor and inner conductor. Each conductor is soldered to the terminal, but this connection requires a considerable amount of effort, which not only increases wiring connection costs considerably, but also requires the use of a soldering iron, etc., for this wiring connection. However, as a countermeasure to this problem, the applicant of this application uses a soldering iron after cutting the coaxial cord smoothly in the direction perpendicular to the axis. He devised a method to connect the device to the terminal without having to use it and has already registered it.

However, in this case, there are individual differences in the degree of pressure contact between the external and internal conductors of the coaxial cord, which is cut smoothly in the direction perpendicular to the axis, and the terminal, resulting in poor contact, especially when holding the cord and pulling out the plug, etc. It had the drawback of being easy.

(Problems to be Solved by the Invention) The present invention has a simple structure and is easy to use, and the degree of pressure contact between the external and internal conductors of the coaxial cord and the terminal is constant and sufficient without being affected by individual differences. To provide a terminal electric wire connection structure in which poor contact is unlikely to occur even when a plug or the like is pulled out by holding a cord, for example.

(Means for Solving the Problem) The present invention provides a needle-shaped positive electrode that is electrically connected to a positive electrode attached to the earth electrode via an insulator at the center of the hole diameter at the bottom of the cord insertion hole for coaxial cord insertion formed in the earth electrode. A terminal and a grounding terminal that conducts with the grounding electrode are inserted into the cord insertion hole, and the exposed end faces thereof are cut smoothly in the direction perpendicular to the axis, and are provided so as to protrude so as to be inserted into the inner conductor and the outer conductor, respectively. , a cylindrical handle is attached to the earth electrode so as to be able to reciprocate a preset distance in the axial direction, and to be tightenable when the cylindrical handle is moved to the stroke end on the earth electrode side; for fixing the coaxial cord to the cylindrical handle in a state in which the coaxial cord inserted into the cord insertion hole is brought into pressure contact with the bottom surface of the cord insertion hole with the shaped handle moved to the stroke end on the side opposite to the earth electrode; A terminal wire connection structure is provided with a fixing means.

(Function) When the cylindrical handle of the terminal wire connection structure configured as described above is moved to the stroke end on the side opposite to the earth electrode, the coaxial cord whose end face is cut smoothly in the direction perpendicular to the axis is connected from the cylindrical handle to the earth electrode. At the same time, the inserted coaxial cord is pressed against the bottom of the cord insertion hole, and the inner conductor and outer conductor of the coaxial cord are connected to the ground terminal and needle-like positive terminal that protrude from the bottom of the cord insertion hole, respectively. The coaxial cord is fixed to the cylindrical handle using, for example, a fixing means consisting of a set screw and a recess in a state in which the coaxial cord is in pressure contact with the With the cord in contact with the bottom of the cord insertion hole by a certain amount of pressure and maintaining constant contact between the internal and external conductors of the same tree cord and the ground and positive terminal, for example, use a screw or turn lock mechanism to ground the cylindrical handle. Tighten and fix to the electrode.

(Embodiment) Next, the configuration of a first embodiment of the present invention will be described with reference to FIGS. 1 to 4.

The earth electrode cylindrical body 1 and the positive electrode sphere 2 are insulated from each other via insulators 3 and 4, and are integrated by screwing and press-fitting a tightening rod 5 that also serves as a positive electrode and the sphere 2. In this tightened state, a needle-like positive terminal 6 of a positive electrode protrudes from the center position of the rear end of the cylinder 1, and an intermediate terminal 7 of a ground electrode protrudes from the stepped hole at the rear end of the cylinder 1. is installed in a state where it is insulated from the positive electrode via the insulator 4, and in this installed state, the outer conductor 10 is located at a certain radius position around the positive terminal 6, that is, the outer conductor 10 is located at a certain radius centering on the inner conductor 9 of the coaxial cord 8. A ground terminal 11 protrudes in a ring shape at a radial position.

In addition, the cylindrical handle 15 has a loosely threaded part 12 and a tightly threaded part 13 with the same diameter and different finishes, sandwiching a groove 14 therebetween. It is installed so that it can move reciprocally in a fixed stroke corresponding to the threaded fit between the threaded part 12 and the threaded part 16 of the cylindrical body 1 when it is forcefully screwed into the threaded part 16 of the cylindrical body 1. , a wire insertion hole 1 formed in the handle 15
A recessed locking portion 18 having approximately the same diameter as the coaxial cord 8 is formed on the inner peripheral surface of the handle 15 , and a wire insertion hole 1 is formed in the handle 15 at a position facing the recessed locking portion 18 .
The coaxial cord 8 inserted into the recessed locking portion 18
A lock screw 19 for pushing into the recessed locking portion 18 in a deformed state along the same axis, in this case, a lock screw 1 having approximately the same diameter as the coaxial cord 8.
9 is attached to the coaxial cord 8 retaining device 20
is formed.

Next, the operation of this embodiment will be explained.

In the terminal electric wire connection structure of the plug 21 configured as described above, the threaded portion 16 of the first stepped portion of the cylindrical body is separated by a pre-regulated constant stroke when screwed into the loosely threaded portion 12 of the cylindrical handle 15. While the coaxial cord 8 is positioned at the retracted end, the coaxial cord 8 whose end face is cut perpendicular to the axis is inserted into the wire insertion hole 17 of the cylindrical handle 15.
, the needle-like positive terminal 6 of the plug 21 is inserted into the inner conductor 9 of the coaxial cord 8, and the plug 2
The ring-shaped ground terminals 11 of the coaxial cord 8 are inserted into the outer conductors 10 of the coaxial cord 8 and connected to each other, and when the locking screw 19 is tightened in this connected state, the coaxial cord 8 is approximately U It is bent into the shape of a square and is locked to the cylindrical handle 15 so that it cannot move in the axial direction.
When the threaded part 16 of the stepped part is tightened by a pre-regulated constant stroke and positioned at the forward end, the inner conductor 9 and outer conductor 10 of the coaxial cord 8 are connected to the needle-shaped positive terminal 6 of the corresponding plug 21. and the ring-shaped ground terminal 11 are reliably connected in an optimal state where they are pressed by a predetermined amount of pressure.

In this locked and tightened state of the coaxial cord 8, even if the rubber and vinyl on the outer periphery of the coaxial cord 8 are plastically deformed over time, the coaxial cord 8 will remain locked between the locking screw 19 and the recessed locking portion 18. It was still folded into a U shape when it was stopped.
Therefore, even if a tensile force is applied to the coaxial cord 8 after this period of time, this tensile force will not affect the connection between each terminal 6, 11 and each conductor 9, 10, and for some reason If poor contact occurs between each terminal 6, 11 and each conductor 9, 10, loosen the locking screw 19, remove the coaxial cord 8 from the cylindrical handle 15, and re-shaft the end of the coaxial cord 8. By inserting the wire cut at right angles into the wire insertion hole 17 of the cylindrical handle 15, the coaxial cord 8 can be easily connected to the plug 21 using only the cutter at hand without using any special tools. In addition, the lock screw 19 can have any type of head such as a minus head, a plus head, a hexagon bolt, a hexagon socket head bolt, or a set screw.
The groove 14 formed in the cylindrical handle 15 can be omitted, and the threaded portion 12 including this portion can be made loose.

Next, FIG. 5 shows a second embodiment of the present invention, in which
In this case, the terminal electric wire connection structure shown in the first embodiment is replaced with the coaxial cord connection BNC connector 22,
That is, the turn lock connects the other connector 27 to one connector 23 by turning the ring 25 while the pin 24 protruding from the side surface of one connector 23 is fitted into the cam groove 26 of the ring 25. Except for the use of a BNC connector 22 equipped with a mechanism, the configuration, operation, and effects are almost the same as those of the first embodiment.

Next, FIG. 6 shows a third embodiment of the present invention, in which
In this case, as a means for tightening the cylindrical handle 28 to the cylindrical body 29 of the earth electrode when the cylindrical handle 28 is moved to the stroke end on the earth electrode side, the cylindrical handle 28 and the cylindrical body 29 of the earth electrode are provided without relative rotation between the two. A linear locking mechanism that tightens the lock by moving it in the axial direction, that is, a bag-shaped nut 31 is rotatably attached to the tip of the cylindrical handle 28 via a snap ring 30 so as to be immovable in the axial direction. A linear locking mechanism is used to tighten the threaded part 32 formed on the stepped part of the cylinder 29, thereby connecting the inner conductor and outer conductor of the coaxial cord to the needle-like positive terminal 34 of the corresponding plug 33 and the ring-shaped locking mechanism. The configuration, operation, and effects are almost the same as those of the first embodiment, except that the connection can be made securely in an optimal state while pressing the ground terminal 35 by a predetermined amount without rotating relative to each other. As the linear lock mechanism, the turn lock mechanism of the second embodiment can be used instead of tightening the screw using the bag-shaped nut 31 shown in the drawing.

Note that, as shown in FIG. 7, an intermediate terminal 40 and an intermediate electrode 41 are connected to the cylinder 36 via insulators 37 to 39.
By attaching this, the plug 42 can be made compatible with the double-shielded coaxial cord 43,
Further, as shown in FIG. 8, in the case of the three-pole connector 44, the positive terminal 48 connected to each conductor 45 to 47 of the coaxial cord 43, the intermediate terminal 49, the cylindrical body 50 of the ground terminal, and the three-pole connector 44 are connected to each other. Each electrode 51-5
Lead contacts 54 having different lengths for connection with 3.
56, and in this case, by arbitrarily selecting the attachment of the lead contacts 54 to 56 to each of the electrodes 51 to 53, for example, the positions of the HOT and COLD electrodes of the microphone connector are arbitrarily selected. be able to.

(Effects of the Invention) The present invention includes a needle-shaped positive terminal that is electrically connected to a positive electrode attached to the ground electrode via an insulator, at the center position of the hole diameter of the bottom surface of the code insertion hole for coaxial cord insertion formed in the ground electrode; A ground terminal that is electrically connected to the ground electrode is provided so as to protrude into each of the inner conductor and outer conductor of a coaxial cord whose end face inserted into the cord insertion hole is cut smoothly in the direction perpendicular to the axis. A cylindrical handle is attached to the cylindrical handle so that it can reciprocate a preset distance in the axial direction and can be tightened when the cylindrical handle is moved to the stroke end on the ground electrode side. Fixing means for fixing the coaxial cord to the cylindrical handle when the coaxial cord inserted into the cord insertion hole is brought into pressure contact with the bottom surface of the cord insertion hole when the coaxial cord is moved to the stroke end on the ground electrode side. It has a wire connection structure for terminals.

As a result, the present invention makes the wire connection structure of the coaxial cord connecting terminal easy to use and simple, and also allows the degree of pressure contact between the external and internal conductors of the coaxial cord and the terminal to be easily controlled without being influenced by individual differences. It has the effect of being constant and sufficient so that, for example, when a plug or the like is pulled out while holding the cord, no contact failure will occur.

[Brief explanation of drawings]

FIG. 1 is a cutaway front view before the handle 15 is assembled to the cylinder 1 of the first embodiment of the present invention, FIG. 2 is a cutaway front view after the handle 15 is assembled to the cylinder 1, and FIGS. Figure 4 is a cutaway front view showing its usage condition.
FIG. 5 is a cutaway front view of the second embodiment of the present invention, and FIG.
The figure is a cutaway front view of a third embodiment of the invention, and FIGS. 7 and 8 are cutaway front views of other embodiments of the invention. 1, 29, 36... Cylindrical body, 6, 34... Positive terminal, 8, 43... Coaxial cord, 9... Internal conductor, 10
...Outer conductor, 11, 35...Earth terminal, 12...Loose screw part, 13...Tight screw part, 15, 28...
Handle, 16...screw part, 17...wire insertion hole, 18...
Locking part, 19... Lock screw, 20... Retaining device, 21, 33, 42... Plug, 22... BNC
Connector, 25...ring, 26...cam groove, 27...
Other connector, 30...Snap spring, 31...
Nut, 32...screw part, 44...3-pole connector.

Claims (1)

[Scope of Claims] 1. A needle-shaped positive terminal that is electrically connected to a positive electrode attached to the ground electrode via an insulator, and a needle-shaped positive terminal that is electrically connected to a positive electrode that is attached to the ground electrode via an insulator, at the center of the hole diameter at the bottom of the code insertion hole for coaxial cord insertion formed in the ground electrode; Each of the ground terminals connected to the electrode is provided so as to protrude into each of the inner conductor and outer conductor of a coaxial cord whose end face inserted into the cord insertion hole is cut smoothly in a direction perpendicular to the axis, and the ground terminal is connected to the ground electrode. A cylindrical handle is attached to the cylindrical handle so that it can reciprocate a preset distance in the axial direction and can be tightened when the cylindrical handle is moved to the stroke end on the ground electrode side. A fixing means is provided for fixing the coaxial cord to the cylindrical handle when the coaxial cord inserted into the cord insertion hole is brought into pressure contact with the bottom surface of the cord insertion hole when the coaxial cord is moved to the electrode side stroke end. A wire connection structure for terminals featuring the following. 2. The terminal electric wire according to claim 1, wherein the cylindrical handle is screwed to the earth electrode as means for tightening the cylindrical handle to the earth electrode when the cylindrical handle is moved to the stroke end on the earth electrode side. connection structure. 3. As a means for tightening the cylindrical handle to the earth electrode when the cylindrical handle is moved to the stroke end on the earth electrode side, a linear locking mechanism is used between the cylindrical handle and the earth electrode that moves the two in the axial direction without relative rotation. An electric wire connection structure for a terminal according to claim 1, characterized in that: 4 The fixing means for fixing the coaxial cord to the cylindrical handle when the coaxial cord is pressed against the bottom surface of the cord insertion hole is a set screw on the side of the cylindrical handle and a set screw whose thread diameter is approximately the same as the inner diameter of the cylindrical handle. 2. The electric wire connection structure for a terminal according to claim 1, further comprising a recess approximately on the inside diameter of the cylindrical handle formed at a position facing the set screw on the inside diameter.