JPS587987Y2 - Coaxial cable stopper for common hearing device - Google Patents

Description

[Detailed description of the invention] This invention is a common listening device used for communal reception of television, radio, etc., such as a series unit, an amplifier, a branching filter,
This relates to a fastener for fixing a coaxial cable to one side of a frame of a branch, distributor, mixer, etc.

A terminal fitting for fixing an internal conductor in this type of fastener is provided with a clamping piece for clamping the internal conductor, and by tightening the clamping piece, the internal conductor is mechanically and electrically connected.

(For example, see Utility Model Publication No. 48-35432).

However, this type of terminal requires the difficult work of wrapping the conductor neatly under the bolt head when fastening it.
It has a major drawback that can be frustrating for workers.

Moreover, if the tightening loosens due to vibration or the like, the above-mentioned mechanical and electrical surface connections come off at the same time, causing various problems.

In order to solve this problem, it may be possible to use measures such as loosening prevention, but this may result in laborious work, an increase in the number of parts, or troublesome connections. Also, favorable results were not obtained from an economic perspective.

Therefore, the present invention is designed to eliminate the above-mentioned drawbacks.
It is an object of the present invention to provide an inexpensive coaxial cable stopper for a public hearing device that allows complete mechanical and electrical connection and also improves the reliability of the connection of internal conductors.

1 to 8 showing embodiments of the present application will be described below.

In series unit (A) shown as an example of a common listening device, 1 is a main frame, 2, 2 are side frames established on both sides of the main frame 1, and these are usually formed integrally by press-molding metal plates.

Reference numeral 3 denotes a mounting hole, which is used when the unit A is mounted on a built-in box (for example, a switch box, an out-left box, etc.) provided on the wall of a room, as is well known.

4 is a mounting hole for a wood screw, and as is well known, unit A is attached to a wall plate.
It is used for fastening.

5 is a hole usually used for attaching a flash plate.

7.8.9 is a terminal block fixed to the main frame 1 as is well known, and is used for extracting signals received by the antenna 6 as is generally known.

The terminal block 7 is used when a parallel feeder is used for connection with the television receiver 10, and as is well known or publicly known, there is a receiving part 7a which is the base of this and a tightening screw thereto. The presser piece 7b, which can be freely moved from a distance to a distance by rotating the knob 7', is made of an insulating material, and has the above-mentioned receiving portion 7a inside.
It has a connecting fitting that enables electrical connection to the conductor of the parallel feeder sandwiched between the holding piece 7b and the holding piece 7b.

Further, the terminal blocks 8 and 9 are used when a coaxial cable is used for the above connection, and as is well known, the base portion 8a of the terminal block 8 is formed of an insulating material. A connecting fitting 8b is provided at the center to electrically and mechanically connect and fix the internal conductor of the coaxial cable using fastening means such as screws.

Further, as is well known, the terminal block 9 is configured to electrically ground and mechanically fix the outer conductor portion of the stepped coaxial cable, and each terminal block 9 has a receiving portion 9a formed of a metal material.
and the presser piece 9b using screws 9', 9'.

Incidentally, this terminal block 9 may be used to fix and hold a parallel feeder connected to the terminal block 7.

Further, the terminal block 8 may have a structure similar to that of a terminal of a coaxial cable stopper, which will be described later.

Furthermore, the shape, quantity, etc. of the plurality of terminal blocks attached to the main frame 1 may be changed in various ways depending on the intended use, as is well known.

Next, reference numeral 12 shown in FIG. 3 is a printed circuit board fixed between the frames 2 and 2 on both sides, and as is well known, the electrical circuit elements 1 necessary for constructing a common listening device circuit such as a branch circuit and a distribution circuit.
3 (coils, resistors, capacitors, etc.), and these constitute circuits for common hearing devices such as branch circuits and distribution circuits.

As is well known, the connection fittings provided on each of the terminal blocks and the common hearing device circuit are connected by wiring so that signals can be taken out from the terminal blocks.

Further, the space surrounded by the frames 1, 2.2 and in which the printed circuit board 12 is located is usually covered with a plate such as a metal plate.

Next, the trunk line (coaxial cable) fasteners 15, 15 provided on the outer surfaces of the side frames 2, 2 will be explained.

Incidentally, these fasteners 15 are normally used to connect the antenna 6 side and the next stage side as shown in FIG.

Further, since these fasteners 15 have the same structure, only one will be explained.

Reference numeral 16 denotes a fastening piece for fastening the outer conductor of the coaxial cable, which is formed into a band shape using a metal plate, and has a fastening part curved in the center thereof so as to be able to fasten the outer conductor of the coaxial cable. 16a.

17 is a soldering hole drilled in the fastening portion 16a; 18
．． Reference numeral 18 denotes tightening screws provided on both sides of the fastening portion 16a, which are screwed into screw holes formed in the side frame 2.
This allows the outer conductor portion to be tightened.

Reference numeral 19 denotes a terminal fitting for fixing the internal conductor of the coaxial cable, which is arranged in series with the fixing piece 16 as shown in the figure.

In this terminal fitting 19, a holder 20 is made of an insulating material, for example, a synthetic resin material, and is attached to a mounting hole 21 drilled in the side frame 2 as shown in FIG. Fixing claws 23 and 23 extending from the circumferential line of the mounting hole 21 are bent and engaged with the formed claw grooves 22' and 22', whereby the holder 20 is integrally fixed to the side frame 2. .

24 is a wall plate 20 on the fastening piece 16 side of the holder 20.
The core wire introduction groove provided at a is formed so that the internal conductor of the coaxial cable can be easily introduced into the holder 20.

25 is a lead-out groove provided in the wall plate 20b on the opposite side to the groove 24.

Reference numeral 27 denotes a receiving plate as a tightening piece provided in the holder 20, which is made of a metal material and has a U-shape.
The receiving plate 27 is prevented from being removed from the holder 20 by twisting the tips of the receiving plate 27 after passing through the through holes 29, 29 formed at the openings 29 and 29.

The connecting portion 28 is connected by wiring to the earphone circuit on the printed circuit board 12 in a well-known manner, and the connection is usually made by soldering using a lead wire.

Reference numeral 30 designates a holding plate as a fastening piece that is placed at a fixed distance from the receiving portion 27a of the receiving plate 27, and is made of a metal plate.

Reference numeral 31 indicates a hole 27 bored in the receiving portion 27a of the receiving plate 27.
' is a screw through which its own threaded rod 31' is passed, and the threaded rod 31' is screwed into a threaded hole 30' provided in the holding plate 30.

Therefore, by rotating this screw 31, the holding plate 30 can be freely moved toward and away from the receiving portion 27a.

Further, the position of the space formed between the above-mentioned receiving portion 27 a and the presser plate 30 is determined by the fixing piece 16 so that the frame 2
It is formed at the position where the tip of the internal conductor that is extended from the coaxial cable is located when it is tightened.

Reference numeral 32 designates a protrusion protruding from the receiving plate 27 for winding the internal conductor, and is integrally formed with the receiving plate 27.

The projecting piece 32 is also provided with winding recesses 32', 32' so that the free end of the inner conductor can be easily wound therein.

The case where the coaxial cable (main line) 35 is fixed to the stopper 15 in the above structure will be explained.

First, as clearly shown in FIG. 4, the coaxial cable 35 is placed in the well-known stepped state, with the inner conductor 36 exposed from the insulator 37 and the outer conductor 38 also exposed from the jacket 39. Make it.

When the coaxial cable 35 thus constructed is pushed into the fastening portion 16a of the fastening piece 16 without running along the frame 2, the internal conductor 36 will connect to the receiving plate 27 and the holding plate 30 of the terminal fitting 19. It is pushed in between.

As a result, the insertion positioning of the outer conductor 38 into the fastening piece 16 and the positioning of the inner conductor 36 with respect to the terminal fitting 19 are performed simultaneously.

Next, when the screws 18, 18 in the fastening piece 16 are tightened, the outer conductor 38 is electrically connected to the frame 2 and is mechanically fixed.

When the screw 31 of the terminal fitting 19 is further tightened, the internal conductor 36 is tightened between the receiving plate 27 and the holding plate 30.

In this way, the cable 35 is firmly attached to the frame 2 with less bulk.

Further, when inserting the coaxial cable, if the tip of the internal conductor 36 is made to protrude from the lead-out groove 25 in the holder 20 by an appropriate amount and the free end of this tip is wrapped around the protruding piece 32 as shown in FIG. can be fixed even more firmly,
The reliability of the connection can be further improved.

Incidentally, the above-mentioned winding portion may be soldered.

In this case, since the soldering is performed on the protrusion 32, the holder 20 will not be scorched by heat.

Next, FIG. 9 showing a different embodiment of the present application will be described.

This figure shows a protrusion 32 for winding the free end of the inner conductor.
This shows an example in which the shape of e is different from that shown in the figure, and in which the internal conductor 36 e is wound and then soldered.

It should be noted that parts that are functionally the same or equivalent to those in the previous figure are given the same reference numerals and the letter e as in both figures, and redundant explanations are omitted.

(Furthermore, in the next and subsequent works, the alphabets f, g, and h will be added in order based on the same idea, and redundant explanation will be omitted.

) Next, FIG. 10 shows that the shape of the winding protrusion 32 f at the free end of the inner conductor is further different;
1 shows an example in which it is integrally formed with a presser plate 30f as a tightening piece.

Next, FIG. 11 shows an example in which the protrusions 32g for winding the internal conductor formed integrally with the holding plate 30g as a tightening piece have different shapes and the protruding directions of the protrusions 32g are different. It is something.

Next, FIG. 12 shows an example in which the shape of the protruding piece 32h for winding the internal conductor formed integrally with the receiving plate 27h as a tightening piece is different, and the protruding direction of the protruding piece 32h is also different. It shows.

As described above, in the present invention, since the internal conductor 36 inserted between the two opposed clamping pieces 27 and 30 is sandwiched between them, the conductor 36 can be stopped. There is an advantage in that two simple methods are needed for the attachment process: inserting it smoothly and tightening it.

In this civil engineering design, since there is a projecting piece 32, the conductor 36 can be wound around it, and there is an advantage that the safety of the effect of fixing the conductor 36 to the terminal fitting 19 can be doubled.

Furthermore, the excellent feature of the present invention is that the position of the protruding piece 32,
It's in its structure.

That is, the protruding piece 32 is located on the opposite side of the fastening piece 27 for the external conductor (on the right side in FIG. 4), and is integral with the tightening piece 27, so that the first protruding piece 32 There is an advantage that complete electrical conduction can be obtained between the two pieces without having to go to the trouble of connecting the piece 32 to the connecting part 28. Secondly, the positional relationship between the tightening piece 27 and the protruding piece 32 is constant (there are many (All of the internal stops in the common listening device have the same shape and mutually constant quality.) As a result, the positional relationship between the conductor 36 wrapped around the protruding piece 32, the tightening piece 27, and the conductor 36 tightened with this is also Each common hearing device is all constant.

Therefore, it is possible to provide good quality with no variation in high frequency characteristics for each common auditory capacity. Moreover, the position of the tip of the protruding conductor 36 is not fixed and wanders, and it bends to the right or left as appropriate, and the high frequency characteristics (relationship between L and C) there are unstable.

It also has the disadvantage that the tip can touch other objects. As a result, the electrical characteristics of each hearing device vary).

Thirdly, even if an extra protruding piece 32 is provided, since it is manufactured integrally with the tightening piece 27, there is no cost involved, and there is no need to attach the protruding piece 32 to the frame 2 at all. Although it offers many advantages as mentioned above, it also has the advantage that it can be implemented at virtually no cost.

[BRIEF DESCRIPTION OF THE DRAWINGS] The drawings show an embodiment of the present application, and FIG. 1 is a schematic diagram showing how the series unit is used, FIG. 2 is a perspective view, FIG. 3 is a rear view, and FIG. 4 is a coaxial diagram. A cross-sectional view showing the positional relationship of the stopper to the cable, Fig. 5 is a perspective view showing the coaxial cable fixed to the stopper, Fig. 6 is a cross-sectional view of the terminal fitting, and Fig. 7 is an exploded perspective view of the terminal fitting. FIG. 8 is an exploded sectional view, and FIGS. 9 to 12 are perspective views showing different embodiments. 16...Fixing piece for attaching external conductor, 19...
...Terminal fitting for fixing internal conductor, 27.30...
・Tightening piece, 28...Connection part, 32...
protrusion.

Claims (1)

[Scope of utility model registration request] One surface of the common hearing device frame is provided with a fastening piece for fastening the outer conductor of the coaxial cable and a terminal fitting for fastening the internal conductor. A pair of clamping pieces facing each other are provided to sandwich the internal conductor inserted between them, and either one of the clamping pieces has a common plate provided inside the frame. A connecting part is provided to enable connection to the hearing circuit, and a free end of the tip of the inner conductor is provided on the opposite side of one of the fastening pieces to the fastening part for the outer conductor. A coaxial cable fastener for a common hearing device, characterized in that it is provided with a projecting piece integrally formed with the above-mentioned tightening piece for winding.