JPH0334002Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a rotating light having a structure in which the direction of reflected light is continuously rotated by rotating a reflecting plate installed near the light bulb. .

[Conventional technology]

As the latest technology regarding this type of revolving light, the "revolving light" described in Utility Model Publication No. 14327/1983 is known.

FIG. 2 is a sectional view showing the above-mentioned known technique, in which a socket support fitting 3 is erected and fixed to a base 1. As shown in FIG. The socket support fitting 3 supports a light bulb 5 via a socket 4.

A disc-shaped rotor 14 is rotatably supported around the socket support fitting 3 as an axis.
A reflecting plate 13 is mounted and fixed on top.

On the other hand, the motor support fitting 7 holds the claw 9 in the hole 1.
0 and is tightened to the socket support fitting 3 by a nut 12. A motor 6 is rotatably supported by a pin screw 8 on this motor support fitting, and is urged counterclockwise in the figure by an elastic force (plate spring) 17.

Due to the above biasing force, the rotation shaft 16 of the motor 6
is brought into sliding contact with the rotor 14. 15 is a rubber ring fitted onto the rotor 14.

A glove 2 is provided covering the above-mentioned components.

When the rotating shaft 16 of the motor 6 rotates, the rotor 14 that is in sliding contact with the rotor 14 through the rubber ring 15 is rotated, and the reflecting plate 13 mounted and fixed on the rotor 14 is rotated.

[Problem that the invention attempts to solve]

In order to smoothly and reliably transmit transmission through sliding contact between the motor rotation shaft 16 and the rubber ring 15, it is necessary that the motor rotation shaft 16 is pressed against the rubber ring 15 uniformly.

Thus, the sliding portion of the motor rotating shaft does not move linearly but moves in an arc.

The above arc movement is centered around the pin screw 8,
It is along an arc of radius L. put it here,
The larger the above-mentioned dimension L is, the closer the movement is to a linear motion and the more likely it is to be pressed uniformly, and the smaller the above-mentioned dimension L is, the more it draws a circular arc with a large curvature, and the more difficult it is to press uniformly.

The setting position of the pin screw 8 in the prior art was based on the technical idea of supporting the motor 6 as close to the center of gravity as possible, so the height h of the pin screw 8 (from the base 1) was relatively large. Since the L dimension is relatively small, the sliding contact portion of the motor rotating shaft 16 rotates in a shape that draws a circular arc s, and since the curvature thereof is large, it is not easy to ensure uniform sliding contact.

That is, as can be easily understood from FIG. 2, if the dimension L is small, a small change in the radius R of the rotor 14 causes a large change in the direction of the motor rotation shaft 16, and the "center of rotation of the rotor 14" The parallelism to the axis CL will be greatly deviated.

However, if the protruding length of the motor rotating shaft 16 is increased in order to increase the above-mentioned dimension L, a large bending moment will be applied to the base of the rotating shaft 16, which is not preferable.

The present invention was developed in view of the above circumstances, and has the following features: i. It is easy to maintain parallelism between the motor rotation axis and the rotor rotation axis, uniform sliding contact between the motor rotation axis and the rotor periphery is maintained, and, It is an object of the present invention to provide a rotating light that is free from the risk of imparting an excessive bending moment to a motor rotating shaft.

[Means for solving problems]

In order to achieve the above object, the rotating light of the present invention has a socket support fitting erected on the base, and a reflector plate is mounted on a disc-shaped rotor that is rotatably supported around the support fitting as an axis. On the other hand, a motor is rotatably supported on the base and its rotating shaft is brought into sliding contact with the disc-shaped rotor, and rotational force is applied to the motor to cause the rotation. In a rotating light having a structure in which the shaft is pressed toward a disc-shaped rotor, an arm is fixed to the motor so that the arm protrudes downward from the motor, and a bearing bracket is fixed to the base, and the bearing bracket is fixed to the base. The lower end of the arm is rotatably supported by a bracket.

[Effect]

The rotary light configured as described above has the motor support shaft located near the base, so the known example (second example)
The dimension h is smaller than that in Figure). Therefore, even if the protruding dimension of the motor rotating shaft is not particularly increased, the radius L of the arc of the locus of the sliding contact portion of the rotating shaft is increased, and uniform sliding contact is facilitated. Furthermore, since there is no need to increase the dimensions, there is no risk of applying a large bending moment to the root of the motor rotating shaft.

〔Example〕

FIG. 1 is a sectional view showing an embodiment of the rotating lamp of the present invention.

In FIG. 1, the constituent members shown with the same drawing reference numbers as those in FIG. 2 (known example) with a dash are similar members corresponding to the constituent members of the revolving light of the known example.

The motor 6' of this example is a bear coil type AC motor, with 6a being a field iron core and 6b being a field coil.

The arm 21 is fixed by protruding downward from the iron core 6a, and the bearing bracket 22 is fixed on the base 1'.

The lower end of the arm 21 is pivotally supported by a pivot shaft 23 by this bearing bracket 22 . The height h' of the pivot shaft 23 with respect to the base 1 is set not to be too large.

As a result, the radius L' of the arc of the locus of the sliding portion of the motor rotating shaft 16' becomes relatively large compared to the height H' from the base 1 to the rotor 14'.

Therefore, the locus of the rotating shaft sliding contact portion becomes close to a straight line, and it is easy to maintain uniform sliding contact with the rubber ring 15'. That is, even if the radius of the rubber ring 15' fitted around the rotor 14' changes, the change in the axial direction of the motor rotation shaft 16' is minute, and the motor rotation shaft 16' is the rotation axis of the rotor 14'. Maintain parallelism with respect to (socket support fitting 3').

[Effect of idea]

As detailed above, according to the rotating light of the present invention, it is easy to maintain parallelism between the motor rotation axis and the rotor rotation axis, uniform sliding contact between the motor rotation axis and the rotor periphery is maintained, and the motor This provides an excellent practical effect in that there is no risk of applying an excessive bending moment to the rotating shaft.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing an embodiment of the rotating lamp of the present invention, and FIG. 2 is a sectional view of a known example. 21...Arm, 22...Bearing bracket, 2
3... Pivot axis.

Claims (1)

[Scope of utility model registration request] A socket support fitting is installed upright with respect to the base, and a reflector is mounted on a disc-shaped rotor that is rotatably supported around the support fitting as an axis, while a motor is rotated with respect to the base. A structure in which the rotary shaft of the motor is movably supported and slidably contacts the disc-shaped rotor, and the motor is biased with rotational force to press the rotary shaft toward the disc-shaped rotor. In the rotating light, an arm is fixed to the motor so that the arm projects downward from the motor, and a bearing bracket is fixed to the base, and the lower end of the arm is rotatable by the bearing bracket. A revolving light characterized by being supported by.