JPS6141204Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electromechanical transducer, and more particularly to an electromechanical transducer that outputs an electrical signal in response to the rotation angle of a rotating shaft connected to a drive shaft.

Conventionally, an electromechanical transducer such as a rotary potentiometer has an element main body 1 as shown in FIG.
In order to arrange the rotation shaft 2 and the drive shaft 3 rotated by an appropriate drive source coaxially and facing each other, the drive shaft 3 is
The shafts 2,
In order to correct the misalignment of the shafts 2 and 3, the shafts 2 and 3 are connected via a universal joint 6 made of an elastic body such as a spring or rubber.

In FIG. 1, reference numerals 7 and 7 designate cap-shaped connectors that are fitted onto the shaft ends of the respective shafts 2 and 3, and are fixed to the shaft ends via screws 8, respectively. Further, reference numerals 9 and 9 indicate a stopper for regulating the movement of the drive shaft 3 in the thrust direction, and 11 indicates an output terminal.

However, in the electromechanical transducer described above, the structure of the universal joint 6 that connects the rotating shaft 2 and the drive shaft 3 is complicated and expensive.
It is difficult to create play in the thrust direction, and due to deformation during transmission of rotational force, the contact pressure of the resistance value of the element body 1 changes in order to apply an external force in the thrust direction to the rotating shaft 2, resulting in an error in the numerical value of the output signal. There is a problem that causes

The present invention was devised in view of the above-mentioned problems, and its purpose is to provide an electromechanical transducer that has a simple structure and does not cause errors in the numerical value of the output signal.

Hereinafter, an embodiment of this invention will be described in detail with reference to FIGS. 2 and 3. In addition, in the following description, the same reference numerals are given to the constituent members having the same functions as the constituent members of the conventional electromechanical transducer, and the explanation thereof will be omitted.

As shown in FIGS. 2 and 3, the electromechanical transducer according to the present invention has a rotating shaft 2 and a driving shaft 3.
and the element main body 1.
It is configured such that it is mounted so as to be movable in the thrust direction while restricting rotation about the rotating shaft 2.

That is, at the end of the drive shaft 3 protruding from the bearing 4 fixedly supported by the support plate 12 extending in the vertical direction perpendicular to the drive shaft 3, the thrust direction of the drive shaft 3 (horizontal direction in FIG. 2) is attached. A large-diameter portion 3a is integrally formed in order to restrict movement of the large-diameter portion 3a, and an insertion hole 13 that opens to the right in FIG. 2 is provided at the axial center of the large-diameter portion 3a. and insertion hole 1
3, the end of the rotating shaft 2 of the element body 1 is inserted as appropriate, and a screw 1 screwed into the large diameter portion 3a is inserted.
It is fixed by 4.

A stopper pin 15 extending parallel to the rotating shaft 2 is implanted in the support plate 12 .
A U-shaped notch 17 as a guided portion is formed at the other end of the holding plate 16, which extends in a direction perpendicular to the main body 1 and has one end fixed to the element body 1.
A stopper pin 15 is slidably engaged within 7. This notch 17 is formed to a sufficiently deep position from the other end of the retaining plate 16 in order to eliminate installation errors of the stopper pin 15.

Note that the guided portion is not limited to a U-shaped notch, but may be a long hole extending in the extending direction of the retaining plate.

As explained above, according to the present invention, the drive shaft and the rotating shaft are directly connected coaxially, and a stopper pin is arranged parallel to the rotating shaft, and one end is covered with the other end of the retaining plate fixed to the element body. Since the guide portion is formed and the stopper pin is slidably engaged with the guided portion, misalignment between the drive shaft and the rotation axis of the element body does not occur. In addition, when the drive shaft moves in the thrust direction, the element body is also guided by the stopper pin and moves in the thrust direction without rotating, and no thrust force is applied from the rotating shaft to the element body, so there is no error in the output signal. It never happens.

[Brief explanation of drawings]

FIG. 1 is a front view of a conventional electromechanical transducer, and FIGS. 2 and 3 are partially cutaway front and side views of the electromechanical transducer according to the present invention, respectively. 1... Element body, 2... Rotating shaft, 3... Drive shaft, 15... Stopper pin, 16... Holding plate,
17... Notch.

Claims (1)

[Scope of utility model registration request] In an electromechanical transducer that outputs an electrical signal in response to the rotation angle of a rotating shaft connected to a drive shaft,
The driving shaft and the rotating shaft are directly connected coaxially, a stopper pin is disposed parallel to the rotating shaft, and a guided portion is formed at the other end of the holding plate whose one end is fixed to the element body. An electromechanical transducer, characterized in that the stopper pin is slidably engaged with a guided portion.