JPH0223976B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a connection terminal used for connecting conductive wires such as coaxial cables and parallel feeders in series units, amplifiers, filter distributors, etc.

Conventionally provided connection terminals, for example, the connection terminal known from Japanese Utility Model Application Publication No. 53-141388,
The configuration is shown in Figures 9A and 9B. In the situation shown in Figure B, the consumer (electrical worker)
A large gap G is shown in advance so that the conductive wire 22 can be immediately inserted into the gap G between the seat plate 5 and the tightening piece 10 for tightening work. If shipped from the manufacturer in such a state, the tightening threaded rod 14 may become in the state shown by the dashed line due to vibration during transportation, and the tightening threaded rod 14 may become damaged by the tightening piece 1 to which it is screwed.
It deviates from 0, and from the point of view of the electrician who is the consumer,
There was a defect that made it a defective product. In FIG. 9, the same reference numerals are used for the same members as in FIG. 8, and redundant explanations are omitted.

In order to eliminate the above-mentioned drawbacks, if the seat plate 5 is shipped in the state shown in Fig. B, the seat plate 5 can be strongly clamped between the screw head 16 and the tightening piece 10, so that the tightening screw rod 14 can be attached to the tightening piece 10.
There is no longer any fear of falling apart. However, even if the electrician tries to insert the conductive wire 22, there is no gap G for inserting the conductive wire 22, and it is necessary to loosen the tightening screw rod 14 and create a large gap G. There are drawbacks. A configuration that requires such work is disliked by consumers, and there is a problem of poor sales of the product, which manufacturers must strictly prevent.

To solve this problem, an attempt was made to insert a spacer into the gap G before shipping as shown in Figure A, but the electrician forgot to remove the spacer, resulting in a construction error. There is a strong desire to solve the above-mentioned problems.

Therefore, in the present invention, a tightening piece 10 having a screw hole 11 for screwing into a tightening threaded rod 14 is disposed inside a bottomed holder 2 that is open from the top, and the holder 2 is movable up and down. A seat plate 5 having a through hole 7 for insertion having a diameter larger than the neck portion 18 of the tightening threaded rod 14 and smaller than the main body portion 15 of the tightening threaded rod 14 is disposed in the opening of the seat plate 5. Moreover, this seat plate 5 includes a fastening part 6b that protrudes from the bottom part 2a of the holder to the outside to fix the seat plate 5 to the holder 2, and an upright piece that connects the fastening part 6b and the seat plate 5. 6a, the tightening threaded rod 14 has a main body portion 15 having a male thread around its periphery for screwing into the screw hole 11 of the tightening piece 10, and a seat plate 5. It has a screw head 16 which is located higher up and has a larger diameter than the insertion hole 7, and a neck part 18 which is located between them and has the smallest diameter, and the tightening piece 10 is fastened to the bottom part 2a of the holder. In this state, the main body portion 1 is attached to the through-hole edge 7a for insertion of the seat plate 5.
By configuring the upper part 15a of the male screw No. 5 to be in pressure contact with each other, when shipped from the manufacturer,
As shown in Fig. 8, a large gap G is formed between the seat plate 5 and the clamping piece 10, so that the electrician can immediately insert the conductor 22 at the site. Above, the tightening piece 10 is crimped to the bottom part 2a of the holder, and the neck 18 of the tightening threaded rod 14 is pressed against the through-hole edge 7a of the seat plate 5, so that the tightening threaded rod 14 is difficult to loosen. This provides a convenient configuration in which the threaded rod 14 is prevented from falling off, thereby solving the above-mentioned problems.

The drawings showing the embodiments of the present application will be described below. Reference numeral 1 denotes a substrate, which is, for example, a case or frame of an electronic device, and is made of a synthetic resin material.
2 shows a holder formed integrally with the substrate 1. 3
2 shows a connection terminal installed in the holder 2, and shows a terminal for connecting the center conductor of a coaxial cable as an example. In this connection terminal 3, 4 indicates the main body. This main body 4 consists of a seat plate 5, upright pieces 6a attached to both sides of the seat plate 5, and a fixing piece 6 at the tip thereof.
b and 6b, which are formed by bending a metal plate. The fixing piece 6b is inserted into the board 1 and then twisted to fix the main body 4 to the board 1. Further, an electric wire 12 is connected to the fastening piece 6b by soldering. Reference numeral 7 indicates a through hole drilled in the seat plate 5 through which a tightening screw rod is inserted. 8 is the missing part,
As clearly shown in FIG. 3, they are formed at the periphery of the insertion hole 7 on the front and rear sides in the direction of insertion of a conductive wire, which will be described later. 9 indicates a retaining piece. Next, reference numeral 10 indicates a tightening piece, which is formed into a rectangular shape as clearly shown in FIG. 11 indicates a screw hole. Next, reference numeral 14 denotes a tightening threaded rod, and a male thread is formed on the outer periphery of the main body portion 15 of the rod. Reference numeral 16 indicates a screw head attached to the base of the threaded rod 14, and there is a groove 1 in which the tip of a Phillips and flat head screwdriver can be engaged.
7 is formed. Reference numeral 18 indicates a neck formed at a portion of the base of the threaded rod 14 that comes into contact with the screw head 16, and the tip 9a of the retaining piece 9 is left there. Next, 20 is a coaxial cable, which has an outer conductor 21, a center conductor 22, etc. as is well known.
23 indicates a well-known external conductor connector, and a connecting piece 24
and a threaded rod 25 for fixing. Note that 26 indicates a conducting wire introduction groove formed in a part of the holder 2, and 27 indicates a lead-out groove.

Conductor 22 (center conductor) in the above configuration
When connecting the conductive wire 22 to the introduction groove 26
Seat plate 5 and tightening piece 10 in connecting terminal 3 via
1 and 2 as shown in FIGS. 1 and 2. After that, engage the tip of the screwdriver in the groove 17,
The tightening threaded rod 14 is rotated using the driver. Then, the tightening piece 10 moves toward the seat plate 5, and the conductive wire 22 is sandwiched between the retaining piece 9 and the tightening piece 10 on the seat plate 5. In this case, as is clear from FIG. 2, the screw head 16, the retaining piece 9 and the conductor 2
2 and the tightening piece 10 are overlapped with each other, the retaining piece 9 and the conductor 22 are sandwiched between the screw head 16 and the tightening piece 10, and the conductor 22 is tightened. The fixation becomes extremely firm. Further, in the case of the above-mentioned tightening, the tightening threaded rod 14 does not move in the axial direction with respect to the seat plate 5, and the rectangular tightening piece 10 is guided by the compatible upper pieces 6a, 6a. Since the rotation thereof is prevented, the tightening described above can be performed extremely easily.

Next, a method for manufacturing the connecting terminal 3 having the above structure will be explained. First, the main body 4 is formed into the shape shown in FIG. 4 by simultaneously punching and bending a well-known metal material (for example, a brass plate) using a press means. Next, in the main body 4 formed in such a shape, the main body portion 15 of the tightening threaded rod 14 is inserted into the through hole 7. In this case, as is clear from FIG. 4, the retaining pieces 9, 9 have a V-shape that protrudes toward the intended position of the tip of the tightening screw rod 14, so that the screw rod When the tip 14a of the holder 14 is directed into the through hole 7, the upper surface 9b of the retaining piece 9 serves as a guide surface, making this operation easier. In addition, when inserting the main body part 15 into the through hole 7, the size between the tips 9a, 9a of the retaining piece 9 and the outer diameter of the main body part 15 are almost the same. Even if the threads of the screws 15 come into contact with the tip 9a, when the main body 15 is pushed into the through hole 7, the retaining piece 9 will close the tip 9a.
Since the main body part 15 is bent in the direction in which the distance between a and 9a increases, insertion of the main body part 15 can also be easily performed.

After completing the insertion work as described above, next
As shown in the figure, the main body 4 is placed over the lower mold 30 and the main body 15 of the threaded rod is placed in the recess 31 in the lower mold 30. In this state, the upper mold 32 is lowered toward the lower mold 30. The upper mold 32 has a screw head 1
A recess 33 is formed to allow the 6 to remain,
Furthermore, since another recess 34 is formed in the portion of the screw head facing the groove 17, only the portion of the screw head 16 other than the groove 17 comes into contact with the inner peripheral surface of the recess 33. In this state, as shown in FIG. 6, by moving the upper die 32 further toward the lower die 30, the retaining piece 9, which is formed into a V-shape by the upper surface 35 of the lower die 30, is removed. The tip 9a is bent back in the direction of being flat, and the tip 9a touches the neck 1.
Located at 8. As a result, the tightening threaded rod 14 is prevented from coming out of the through hole 7. In the case of the above-mentioned work, the existence of the recess 34 prevents accidents such as crushing of the groove 17. Further, the above operation may be performed by changing the positions of the upper mold 32 and the lower mold 30. After the unbending as described above is completed, the lower mold 30
and the upper mold 32, and remove the main body 4, the tightening screw rod 14, etc. from the lower mold 30. Thereafter, the connecting terminal 3 is completed by screwing the tightening piece 10 onto the main body portion 15 of the tightening threaded rod 14.

As described above, in the present invention, the neck portion 18 of the tightening threaded rod 14 is made small in diameter so as to be loosely inserted into the through hole 7, and the main body portion 15 of the tightening threaded rod 14 is made in a large diameter, so that the tightening piece 10 is tightened to the bottom part 2a of the holder, the upper part 15a of the male thread of the main body part 15 comes into pressure contact with the through-hole edge 7a of the seat plate 5, so when shipped from the manufacturer,
As shown in FIG. 8, each of the fastening pieces 1
0 and the upper part 15a of the male thread can be fixed and immovable for shipment, thereby preventing the tightening threaded rod 14 from falling off due to "screw loosening", and also creating a gap G for inserting the conductor 22. The present invention is highly useful in solving the problems of the prior art, as it has the effect of ensuring a large amount of energy and allowing the electricians to start work immediately at the site.

[Brief explanation of drawings]

The drawings show an embodiment of the present application, and Fig. 1 is a perspective view of a coaxial cable connection terminal, Fig. 2 is a cross-sectional view taken along the - line, Fig. 3 is a cross-sectional view taken along the - line, and Fig. 4 is a view showing how it is tightened to the seat plate. 5 and 6 are cross-sectional views showing the process of bending back the retaining piece, and FIG. 7 is a perspective view showing the relationship between the upper mold, the lower mold, and the connecting terminal. Figure 8 is a cross-sectional view of the holder in a horizontal position for installation, and A and B in Figure 9 are also cross-sectional views of the holder in a horizontal position for installation. 5... Seat plate, 10... Tightening piece, 14... Tightening threaded rod, 9... Retaining piece, 18... Neck.

Claims (1)

[Claims] 1 A fastening piece 10 having a screw hole 11 for screwing into a tightening threaded rod 14 is disposed inside the bottomed holder 2 that is open at the top, and is movable up and down. The seat plate 5 is provided with a through hole 7 for insertion which is larger in diameter than the neck portion 18 of the tightening screw rod 14 and smaller in diameter than the main body portion 15 of the tightening screw rod 14. Reference numeral 5 denotes a fastening part 6b and a fastening part 6 which project outward from the bottom part 2a of the holder and are used to fix the seat plate 5 to the holder 2.
It is formed of a plate-like integral material together with the upright piece 6a connecting the seat plate 5 and the tightening threaded rod 1.
4 includes a main body portion 15 having a male screw around the periphery for screwing into the screw hole 11 of the tightening piece 10, and a seat plate 5.
The screw head 16 is located higher up and has a larger diameter than the insertion hole 7.
and a neck portion 18 having the smallest diameter between them, and when the tightening piece 10 is tightened to the bottom portion 2a of the holder, the through-hole edge 7a for insertion of the seat plate 5 is inserted. Upper part 1 of the male thread of the main body part 15
A connection terminal characterized in that 5a is adapted to be in pressure contact.