JPS5938752Y2 - pulse generator - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a pulse generator that generates a pulse signal in accordance with the rotation of a rotating body.

Conventionally, as shown in FIG. 1, this type of pulse generator includes a rotating body, for example, a pulley 2, to which rotational force is transmitted via a belt 1, coaxially with an insulating surface 3a and a conductive surface 3b extending in the circumferential direction.
A brush 4 is provided in sliding contact with the circumferential surface of the roller 3, and a DC power source 5 and a pulse detector 6 are connected in series to the brush 4. When the pulley 2 is rotated via the belt 1, There is a device in which a series circuit of a power source 5 and a pulse detector 6 is connected or disconnected via a brush 4 by the rotation of the roller 3 accompanying this, and a pulse signal is generated in accordance with the rotation of the pulley 2.

However, with such a configuration, since the rotation of the roller 3 is detected via the brush 4, the sliding contact between the brush 4 and the roller 3 tends to become unstable, and it is difficult to accurately detect the rotation of the roller 3 according to the rotation of the pulley 2. It may not be possible to obtain a proper pulse signal.

This invention was made in order to eliminate the above-mentioned drawbacks, and an object thereof is to provide a pulse generator that can stably obtain a pulse signal corresponding to the rotation of a rotating body.

An embodiment of this invention will be described below with reference to the drawings.

In FIGS. 2a and 2b, reference numeral 11 denotes a base, and a rotating body such as a pulley 13 is provided on this base 11 via a shaft 12.

In this case, the base 11, shaft 12 and pulley 13 are each made of a conductor.

Further, a small diameter pulley 14 is fixed to the pulley 13, and this pulley 14 is connected to a drive source (not shown) via a belt 15.

On the other hand, another rotating body, such as a pulley 17, is connected to the pulley 13 via an endless belt 16.

In this case, the belt 16 is made of an elastic member having conductivity, such as a conductive rubber material.

Further, the pulley 17 is provided on a base 19 via a shaft 18.

Here, the pulley 17 is made of a conductor and is provided with an insulating member 171 on approximately two-thirds of its entire periphery.

Further, 1. The shaft 18 and the base 19 are each made of a conductor.

A DC power supply 20 is provided between the bases 11 and 19.
and a detector such as a pulse detector 21 are connected in series.

Next, the operation of the apparatus constructed as above will be described.

When the pulley 14 is rotated via the belt 15 by a drive source (not shown), the pulley 13 also begins to rotate.

Then, the rotational force is transmitted to the pulley 17 via the belt 16, and the pulley 17 also rotates.

In this case, if the belt 16 is located at the insulating member 171 portion of the pulley 17 as shown in FIG. does not flow to the pulley 13 side through the belt 15, and no output is generated at the pulse detector 21.

In this state, when the pulley 17 further rotates and the belt 16 is positioned on the conductor part of the pulley 17 as shown in FIG.
The flow flows from the belt 1-6 to the pulley 13 to the shaft 12 to the base 11 to the pulse detector 21 to the power supply 20, and the pulse detector 21 generates an output.

From this, when the pulley 17 rotates in the same manner, an output is generated from the pulse detector 21 every time the belt 16 is positioned on the conductor part of the pulley 17, and this causes a pulse signal corresponding to the rotation of the pulley 17. will be obtained.

Therefore, with such a configuration, by simply driving one pulley through the conductive belt, the other pulley can be driven.
Since a pulse signal corresponding to the rotation of the pulley can be obtained, a more accurate pulse signal can be stably obtained over a long period of time compared to a conventional method using a brush.

This means that if such a structure is used, for example, in a tape counter mechanism of a tape recorder, a stable pulse signal for the tape counter can be obtained.

Next, another embodiment of this invention will be described with reference to FIG. 3 atb.

In this case, an idler 33 is provided on the base 31 via a shaft 32 as a rotating body.

Here, the base 31 and shaft 32 are made of a conductor.

The idler 33 is also made of a conductor, and an insulating member 331 is provided on approximately half of the entire periphery.

Another rotating body, such as an idler 34, is provided in contact with the idler 33.

The idler 34 is made of a conductor, and is provided with a conductive elastic member such as a conductive rubber 35 along its periphery.

Further, the idler 34 is provided on the base 37 via a shaft 36.

Here, the shaft 35 and the base 36 are also each made of a conductor.

A DC power source 38 and a pulse detector 39 are connected in series between the bases 31 and 36.

Here, 40 in the figure is a motor idler.

However, even if this is done, if the insulating member 331 of the idler 33 is in contact with the idler 34 as shown in FIG. The current from the pulse detector 3 does not flow through the idler 34 to the idler 33 side.
No output is generated on 9.

In this state, when the idler 33 rotates further and the conductor part of the idler 33 comes into contact with the conductive rubber 35 of the idler 34 as shown in FIG.
→ Shaft 36 → Idler 34 → Conductive rubber 35 → Idler 3
3 → Axis 32 → Base 31 → Pulse detector 39 → Power supply 38
The pulse detector 39 generates an output.

Therefore, when the idler 33 rotates in the same manner, the pulse detector 39 generates an output every time the conductive part contacts the conductive rubber 35 of the idler 34, and this causes a pulse corresponding to the rotation of the idlers 33 and 34. A signal can be obtained, and the same effects as described above can be expected.

It should be noted that this invention is not limited to the above-mentioned embodiments, but can be implemented with appropriate modifications without changing the gist.

For example, in the above-described embodiment, the entire belt 16 is made of a conductive rubber material, but it is also possible to use a two-layered, integrated material made of conductive rubber and insulating rubber.

As described above, according to this invention, it is possible to provide a pulse generator that can stably obtain pulse signals corresponding to the rotation of a rotating body.

[Brief explanation of drawings]

Fig. 1 is a schematic block diagram showing an example of a conventional pulse generator, Fig. 2 a 9 b' is a schematic block diagram showing an embodiment of this invention, and Fig. 3 a 9 b is another embodiment of this invention. FIG. 115.16... Belt, 2, 13, 14° 17...
・Pulley, 3...Roller, 3a...Insulating surface, 36.
...Conductor surface, 4...Brush, 5.20.38.
...DC power supply, 6,21,39...Pulse detector, 1
1,19゜31.37...Base, 171,331・
...Insulating member, 12.1B, 32.36...Shaft, 35
...Conductive rubber.

Claims (3)

[Scope of utility model registration request] (1) A rotating body made of a conductor with an insulating member provided on a part of its periphery, a rotating body made of a conductor provided corresponding to this rotating body, and one rotating body that is in contact with the periphery of these rotating bodies. an electrically conductive elastic member that transmits driving force from the rotating body to the other rotating body;
A pulse generator comprising: means for detecting the presence or absence of an electric path between the rotating bodies and generating a pulse output in accordance with the rotation of the rotating bodies. (2) The pulse generator according to claim 1, wherein the elastic member is an endless belt provided between rotating bodies. (3) A utility model registration claim characterized in that the elastic member is provided along the periphery of another rotating body corresponding to a rotating body having an insulating member provided on a part of the periphery.