JPH0129977Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention particularly relates to a terminal structure for audio input/output leads.

In general, among various electrical devices, the types shown in FIGS. 1 to 3 are well known as audio input/output terminals.

The terminal structure shown in FIG.
The terminal head 3 is connected by a chisel, and the lead wire R is inserted into both holes when the insertion holes 1, a, and 3a protruding from both terminal members are brought into alignment by pressing against the spring pressure of the terminal head 3. When the terminal head 3 is released from the pressing operation, both holes are shifted again due to the elastic force of the spring member 2 and the lead wire R is clamped.

According to this structure, the lead wire R is connected to the terminal base 1
There is the inconvenience of having to insert the terminal at the moment the insertion hole 1a of the terminal head 3 and the insertion hole 3a of the terminal head 3 are aligned. Furthermore, if the elastic force of the spring member 2 is too strong, there is a risk that the lead wire R may be sheared even in the state shown in the figure, and if it is too weak, it may easily come off.

In the case of the terminal structure shown in FIG. 2, the winding diameter of the terminal head 3 must be made relatively large in order to secure the large diameter lead wire R.

The structure shown in FIG. 3 is an attempt to improve the above two terminal structures. In this case, the terminal head 3 is screwed into the terminal base 1, and a slide is fixed inside the terminal head 3. As the terminal head 3 rotates, the clamping fitting 4 moves up and down within the lead wire insertion groove 1a provided in the terminal base 1, thereby clamping and holding the lead wire R. However, according to this method, the terminal head 3
As the height H of the terminal as a whole changes with the rotational movement of the terminal, there is a possibility that an unnecessary protrusion may occur with respect to the housing surface of the device. It should be noted that in the explanation of the above three types of terminal structures, those described with the same reference numerals are the same type of members.

The present invention was developed in view of the circumstances of the current terminal structure as described above, and its purpose is to eliminate these defects so that the height of the entire terminal remains unchanged and is reliably strong. It is an object of the present invention to provide a terminal structure that allows connection of lead wires.

To achieve this objective, the present invention is characterized by the following configuration. In other words, in the rotation method of the terminal head mounted on the terminal base, the length of both terminal members is made variable by simply rotating them in sliding contact with each other, and a screw protruding inside one terminal head is used. Only the slide clamp screwed onto the rod can move up and down as the terminal head rotates.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The structure of an embodiment of the present invention will be described in detail below with reference to the drawings. Incidentally, among the reference symbols used in the explanation of the various structures of the current type, the same reference symbols are used for the same types. In FIG. 4a and FIG. 4b, which is a cross-sectional view taken along the Y-Y line, the terminal base 1 is formed by vertically dividing a cylindrical body made of conductive metal into two halves. The central space portion is a groove portion 1a with an open top. Further, a bulge-molded engagement protrusion 1b is provided around the outer periphery of the upper part of the open end. In the figure, 1c indicates a mounting member such as a screw on the device side of the terminal base 1, but there is no need to limit it to this method.

On the other hand, the cap-shaped terminal head 3 which is attached to the terminal base 1 is also made of conductive metal. An engagement groove 3b is provided on the inner circumferential surface of the tip of the side edge 3a of the terminal head 3 in a concave-convex engagement relationship so as to fit onto the engagement protrusion 1b formed on the terminal base 1. There is. Therefore, the terminal head 3 is slidably rotatable relative to the terminal base 1 by fitting the engagement protrusion 1b and the engagement groove 3b. Further, the terminal head 3 is further provided with a screw rod 3c integrally protruding from the center thereof, and this screw rod 3c
A slide clamp 4 is screwed onto the terminal head 3, and is moved up and down by gripping and rotating the terminal head 3.

That is, when it is intended to move the slide clamp 4 downward in the figure by rotating the terminal head 3 clockwise, for example, if the female screw part 4a of the slide clamp 4 is a right-handed thread. The threaded rod 3c that is screwed into this needs to have a so-called reverse thread. Furthermore, the slide clamp 4 is formed to have a cross-sectional shape as shown in FIG. are provided on both sides. Therefore,
This mechanism allows the sliding clamp to slide in either the up or down direction without rotating in conjunction with the rotation of the four-terminal head 3.

The operation of the above configuration is such that when the terminal head 3 is rotated clockwise to the right after the end of the lead wire R is inserted into the groove 1a of the terminal base 1, the slide clamp 4 moves downward. Then, the R end portion of the lead wire is pressed against the groove portion 1a from above to be clamped.

Based on the above operation, if at least one of the bottom surface of the groove 1a, the bottom surface of the slide clamp 4, or the bottom surface 4c of the slide clamp 4, and more preferably both bottoms are formed into a wave shape, the lead wire R can be formed.
The grip will be made even more solid with anti-slip features.

Therefore, according to the present invention, the following effects can be expected as understood from the above explanation.
In other words, as with various conventional terminals, wire breakage occurs due to shearing when connecting the lead wires, and if the lead wire diameter is large, the winding diameter must be increased accordingly. This eliminates all the problems, such as unnecessary protrusion caused by the change in the overall length of the terminal paired with the terminal base due to the rotation of the terminal head, and also ensures that the lead wires are held securely. It is.

[Brief explanation of the drawing]

Figures 1 through 3 each show the current terminal structure. FIGS. 4a and 4b are a small sectional view showing the terminal structure of the embodiment and a plan sectional view taken along the line Y--Y. Explanation of symbols of main parts, 1...Terminal base, 1
a...Groove portion, 1b...Engaging protrusion, 3...Terminal head, 3b...Engaging groove, 3c...Threaded rod, 3d...
...Wavy bottom part, 4...Slide clamp, 4a...
...Female screw part, 4b... Rotation prevention part.

Claims (1)

[Scope of utility model registration request] A terminal structure for connecting an end of a lead wire, a groove protruding from one end surface of a cylindrical body made of a conductive metal in the axial direction so as to divide the cylindrical body into two, into which the terminal end is inserted. a terminal base having a bulging engagement portion formed at the outer peripheral end of the cylindrical body; and a cap-shaped terminal base that is rotatably mounted in sliding contact with the bulging engagement portion of the terminal base. a terminal head having a screw rod protruding from the center thereof; and a terminal head that is slidably fitted into the groove of the terminal base and screwed into the screw rod of the terminal head at the center thereof; A terminal structure for a lead wire, comprising a clamping fitting formed to press and clamp the end of the lead wire in the groove as the terminal head rotates.