JPH0714945Y2 - Object detector orientation adjustment mechanism - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a mechanism for adjusting the direction of the detection area of an object detector, and a mechanism that can change the direction in any direction around a reference direction. , With the minimum number of parts.

[Prior Art] In the case of an object detector using ultrasonic waves or infrared rays, after fixing the detector body to the ceiling, the detection area is adjusted.
It was necessary to freely change the focusing direction of ultrasonic waves and infrared rays.

As an example of this kind of adjusting mechanism, conventionally, as shown in FIG. 5, a rotating body 53 equipped with a sensor body and a U-shaped spring 51,
The tension spring 52 is pressed against the case 54 by two springs, and is held so as to be rotatable in the front, rear, left and right directions.

[Problems to be Solved by the Invention] In the conventional configuration, two springs are required to support the rotating body while pressing the rotating body against the case. Further, there is a problem that a space for accommodating these two springs is required, and the detector as a whole becomes large.

[Means for Solving Problems] In the present invention, one spring has a function of pressing the rotating body against the case and a function of a rotation guide.
When rotating in any direction due to the elasticity of the U-shaped spring itself,
It realizes a direction adjusting mechanism that keeps the friction between the rotating body and the case almost constant.

[Operation] According to the configuration of the present invention, since the rotating body can be pressed from the inside toward the case by one U-shaped spring, no parts are required between the rotating body and the case. Can be miniaturized.

Further, since the contact surface between the U-shaped spring and the rotating body can be configured so that the force is uniformly applied in the radial direction around the point A, the same force can be applied when rotating in any direction.

[Embodiment] FIG. 1 is a perspective view showing a structure of a direction adjusting mechanism of the present invention, FIG. 2 is a sectional view thereof, and FIG. 3 is a sectional view of a main part of FIG. It is a perspective view. The rotating body 2 has a point A.
An outer surface 1 which is a part of a sphere centered at is provided, and the outer surface 1 is in contact with the case 3. The inner bottom surface of the rotating body 2 is
It is pressed in the direction of the case 3 by a U-shaped spring 4. The U-shaped spring 4 is rotatably supported by the support frame 5 integrated with the case 3 at the fulcrums B and B ′. Since the arc of the U-shaped spring has a curved shape around the point A, the pressing force on the contact surface between the outer surface 1 and the case 3 when the rotating body 2 moves in the direction of arrow a in FIG. Is almost constant, and the frictional force is also constant.

FIG. 3 is a perspective view in which the rotating body 2 of FIG. 1 is cut along a plane including the point A and orthogonal to BB ′, and a contact portion between the U-shaped spring 4 and the rotating body 2 is enlarged. When the rotating body moves in the direction of the arrow b, that is, in the direction orthogonal to the direction shown by the arrow a of FIG. 2, on the bottom surface 6 of the rotating body 2, as shown in FIG. Since 32 is provided, the U-shaped spring does not move on the bottom surface of the rotating body in the direction of arrow b in FIG. 3,
The rotating body 2 and the U-shaped spring 4 rotate about the fulcrum BB '. Therefore, even if the rotating body 2 moves in the direction of the arrow b in FIG. 3, the distance between the center of rotation of the U-shaped spring and the bottom surface 6 of the rotating body is constant. The pressure applied to the case 3 is almost constant, and the frictional force between them is also substantially constant.

As described above, the combination of the movements in the a direction and the b direction that are orthogonal to each other allows the rotating body 2 to rotate in any direction.

FIG. 4 is a sectional view of a detector equipped with an optical system of a rotating body and an infrared detecting element. The positional relationship between the rotating body and the case is upside down from that shown in FIG.

The position of the point A is made to coincide with the focus of the parabolic mirror 42, and the infrared detection element 43 is arranged at this position. This parabolic mirror 42
A plurality of flat mirrors 41 are arranged at a position that is largely adjacent to each other to form a cone-shaped detection area. 44 is a cover that transmits infrared rays. Since the plane mirror and the infrared detecting element are fixed to the rotator 2, the rotation of the rotator changes the directions of the plurality of conical detection areas.

In addition, the same effect can be obtained by fixing the infrared detecting element unit integrated with the optical system to the rotating body of the direction adjusting mechanism of the present invention.

As shown in FIG. 4, when the rotation range of the rotating body is narrow,
The rotation axis of the U-shaped spring may be closer to the bottom surface of the rotating body than the point A or may be far from the point A as long as the force pressing the rotating body against the case does not change significantly. Further, instead of the protrusion shown in FIG. 3, a recess having the same function may be provided on the bottom surface of the rotating body. Regarding the shape of the U-shaped spring 4, if the force pressing the rotating body against the case does not change significantly within the rotation range of the rotating body, it may have a shape similar to a V-shape as in the example of FIG. Other forms are possible.

[Advantage of the Invention] According to the present invention, the angle can be adjusted in any direction with respect to the center point, and the operation force is constant in any direction. Further, the number of parts can be reduced as compared with the conventional configuration.

As described above, according to the present invention, an adjusting mechanism having a simple structure and good operability is realized, and a great effect is exerted in improving the operability of the detector.

[Brief description of drawings]

FIG. 1 is a perspective view showing the configuration of the present invention, FIG. 2 is a sectional view thereof, and FIG. 3 is a sectional perspective view of an essential part of FIG. FIG. 4 is a sectional view of an infrared detector using the adjusting mechanism of the present invention, and FIG. 5 is a view showing a conventional adjusting mechanism.

Claims (1)

[Scope of utility model registration request] 1. A rotating body 2 having an outer surface 1 of a sphere formed by cutting a sphere centered at a point A in two parallel planes, and a case 3 for supporting the rotating body 2 by contacting with the outer surface 1. When,
A U-shaped spring 4 supported by a support frame 5 integrated with the case 3 is provided, and the U-shaped spring 4 applies a force in a direction of pressing the bottom surface of the rotating body 2 from the inner side to the case 3, and the U-shaped spring 4
An object having a structure in which a protrusion for preventing relative movement of the U-shaped spring 4 in a contact portion between the rotor and the rotating body 2 is provided in a direction other than the tangential direction of the arc of the U-shaped spring 4. Direction adjustment mechanism for the detector.