JP3240077U - Reel-type take-up device for electrical signal wires without contacts - Google Patents

Abstract

A reel-type winding device is provided that avoids unstable signal transmission at a sliding portion when winding a signal line on a reel. A reel-type winding device does not have a sliding contact mechanism in a signal transmission path, and rotates by transmitting a signal through conduction of a conductive spiral spring used for winding a cord. Stable signal transmission is possible without being influenced, and it can be provided at a low cost. [Selection drawing] Fig. 6

Description

The present invention relates to a reel-type winding device for winding an electrical signal line on a reel.

In the case of a structure in which the signal line is wound on a reel, a slip mechanism is required when the signal passes through the reel portion, and it is difficult to stably transmit the signal by the contact of the contact. In particular, a signal generated by a minute current is likely to cause poor contact, resulting in missing or erroneous transmission of the signal. As a method of transmission, although it is an example of a power supply mechanism, a method of using a contact piece as in Patent Document 1 is common, but in long-term use, wear of the contact point occurs, which further reduces the stability of contact. descend. In some cases, rotary transformers are used to avoid instability of signal transmission due to contact during rotary operation. A method of eliminating the Patent Document 2 discloses a method in which a winding device is provided in the middle part of one signal line to wind up both sides of the signal line. It was unsuitable for products to be fixed to fixtures and the like. Patent Document 3 discloses an example in which a flexible printed circuit board is attached to a spiral spring used for winding along the spiral spring, and a contact mechanism is eliminated from the signal transmission path by wiring to the printed circuit board. Although it is effective for core signal transmission, it is difficult to realize at a low cost due to the cost of parts and complicated assembly.

Japanese Patent Application Showa 59-43937 Practical Application Showa 61-199662 Practical Application Showa 63-67559

When the signal line is wound on a reel, it is necessary to provide a sliding part to absorb the rotation of the reel as shown in [Fig. 1] and [Fig. 2]. It is difficult to maintain a stable contact state at the same position for a long time. It is a thing. In addition, it has a simple structure and realizes small size and low cost.

The present invention does not use a mechanical contact mechanism (sliding part) in the path to transmit the signal input from the signal line to the output line via the cord reel, and directly signals by conducting multiple conductive spiral springs. This transmission solves the problem of unstable contact of the sliding portion that occurs when using a reel-type winding mechanism.

As described above, according to the present invention, the signal is transmitted directly without a contact mechanism in the signal transmission path, so that the signal can be transmitted stably without being influenced by the movement of the rotating reel portion. In addition, by using the conduction of the spiral spring as a signal transmission path, the structure becomes simple and the assembly process is simplified, which contributes to cost reduction.

It is an example of a conventional reel-type winding device. FIG. 10 is a signal path diagram of a conventional reel type winding device. 1 is a diagram of a reel-type winding device of the present invention; FIG. FIG. 3 is a signal path diagram of the reel-type winding device of the present invention; 1 is an embodiment of a reel-type winding device according to the present invention; 1 is an exploded view of a reel-type winding device of the present invention; FIG. FIG. 4 is a diagram of an example of improved wiring of the reel-type winding device of the present invention;

A "reel", a "spring", and a "reel shaft" are contained in the "casing" for the winding function of the signal line. Two of the same parts are used for the "reel" and "spring" and assigned to the signal lines (two). The signal line is connected to the reel-side fixed portion of the spiral spring, and the output line is connected from the reel-shaft-side fixed portion of the same spiral spring. The connection of the signal line and the output line to the spiral spring should be securely connected by "soldering" or "spot welding".

An embodiment will be described below with reference to the accompanying drawings. In the reel-type winding device of the present invention, the core wire A21 of the signal line 8 is connected to the end of the spiral spring A13 as one signal path, and the core wire A23 of the output line 9 is connected to the opposite end. As another signal path, the core wire B22 of the signal line 8 is connected to the end of the spiral spring B14, and the core wire B24 of the output line 9 is connected to the opposite end.

The core wire of the mainspring and the signal line 8 are connected to the reel-side mainspring spring fixing portion A17 and the reel-side mainspring spring fixing portion B18, and the core wire of the output line 9 is connected to the shaft-side signal wire connection portion A19 and the shaft-side signal wire connection portion B20. Reliable connection by soldering or spot welding. As a result, the signal line and the output line are in a state of being directly electrically connected without any contact portion. In FIG. 6 of the drawing, for the sake of explanation, the core wires A21 and A22 of the signal line 8 and the core wires A23 and B24 of the output line 9 are shown to be long connected. This is the shortest wiring possible.

Since the reel shaft 2 is fixed to the housing A25 and the housing B26, when the signal line 8 is pulled out, the spiral spring A13 is activated in accordance with the movement of the combined reels A11 and B12 rotating about the reel shaft 2. and the spiral spring B14 is wound. Since the wound spiral spring accumulates a force to return, a force acts in the direction of winding the signal line 8 .

If the core wire A 23 and the core wire B 24 of the output line 9 are divided into the housing A 25 and the housing B 26 for wiring, the assembling process becomes complicated and causes an increase in cost. A through hole 27 is provided in the reel shaft 2, and the core wire B24 of the output wire 9 is passed through and gathered in the vicinity of the core wire A23 of the output wire 9, thereby facilitating wiring and assembly.

1 reel 2 reel shaft 3 contact ring a
4 contact ring b
5 contact piece a
6 contact piece b
7 contact piece base 8 signal line 9 output line 10 sliding portion (contact portion)
11 Reel A
12 Reel B
13 Conductive spiral spring A
14 Electrically conductive spiral spring B
15 Reel side spiral spring fixing part A
16 Reel side spiral spring fixing part B
17 Reel side signal wire connection part A
18 Reel-side signal line connection B
19 Shaft side signal wire connection A
20 Shaft side signal line connection B
21 signal line/core line A
22 signal wire/core wire B
23 output wire/core wire A
24 output wire / core wire B
25 housing A
26 housing B
27 through hole

Claims (2)

A reel-type winding device for winding a cord of an electrical signal line, characterized by using a plurality of conductive spiral springs for signal transmission. 2. The device according to claim 1, wherein the electric signal line passes through the inside of the reel shaft.

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