JPH0541462Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention relates to lighting equipment such as spot lights.

[Conventional technology]

A conventional lighting fixture will be explained based on FIG.
In the figure, 60 is an instrument main body, and an irradiation opening 61 and a lens 62 are provided on the front surface.
A motor 63 that can rotate in both left and right directions is provided at the rear of the lighting device 60, and a male screw 64 extending in the direction of the irradiation opening 61 is fixed to the rotating shaft of the motor 63, and the tip of the male screw 64 is rotatable. Supported. Further, 65 is a lamp, which consists of a socket 66, a lamp 67, a reflector 68, etc., and a male screw 64 is screwed into a female screw 74 provided at the bottom.
It is provided so as to be horizontally movable back and forth along a guide (not shown). When the motor 63 is driven to rotate, the lamp 65 moves back and forth along the male screw 64. Reference numerals 69 and 70 indicate limit switches that the lamp 65 comes into contact with at the front and rear end positions, respectively, to stop the motor 63.

[The problem that the idea aims to solve]

However, according to the lighting fixture configured in this way, when the lamp 65 comes to the rear end position shown by the solid line, the lamp 67 approaches the motor 63, so the male screw 6
There is a problem that the motor 63 is adversely affected by heat conduction through the motor 63 and the like. Furthermore, since the limit switches 69 and 70 operate in direct contact with the lamp 65, they are adversely affected by heat. Therefore, a fan 71 is provided in the appliance body 60 to release the heat inside the appliance body 60 through the heat radiation hole 72. This creates a new problem of complicating the structure. Furthermore, since the limit switches 69, 70 and the fan 71 are located below the lamp 65, the height of the apparatus becomes high, making it impossible to downsize the apparatus.

Therefore, the purpose of this invention is to provide a lighting fixture with a simple structure and small size, which can protect heat-sensitive parts such as the motor and limit switch from the heat of the lamp without using a cooling fan or the like. It is to be.

[Means to solve the problem]

The lighting device according to claim (1) has an irradiation opening formed in the front surface, a lamp guide extending back and forth toward the irradiation opening, and a motor guide extending in the direction of the irradiation opening behind the lamp guide. A fixture body provided with a female thread located between the light guide and the motor guide, a light fixture provided so as to be movable forward and backward along the light guide, and a light fixture movable forward and backward along the motor guide. and a male screw whose front end is rotatably connected to the lamp, whose rear end is fixed to the rotating shaft of the motor, and whose intermediate portion is screwed into the female screw.

The lighting device according to claim (2) is the lighting device according to claim (1), further comprising a pair of limit switches for stopping the rotational drive of the motor at both ends of a range of movement of the motor back and forth corresponding to a range of movement of the lamp back and forth. It is set up.

[Effect]

According to the lighting device of claim (1), the lighting device and the motor are connected to each other via the male screw, and when the motor is rotationally driven to move the lighting device forward or backward, the motor also moves in parallel with the lighting device. That is, the distance between the lamp and the motor is always kept constant, and the motor is not adversely affected by the heat of the lamp. In this way, the motor can be protected from the heat of the lamp without using a cooling fan or the like, and the structure is simple and compact.

According to the lighting device of claim (2), the limit switches that stop the rotation of the motor are provided at both ends of the range of forward and backward movement of the motor, so the limit switches are moved away from the lamp, and the lamp can be operated without a cooling fan or the like. Since it is less susceptible to the effects of heat, has a simple structure, and the limit switch is provided at the location where the motor is installed, the device can be further miniaturized.

〔Example〕

An embodiment of this invention will be explained based on FIGS. 1 to 4.

In FIG. 1, reference numeral 10 denotes an instrument main body, which has an irradiation aperture 11 and a lens 12 on its front surface, and a motor storage case 13 on its rear end. A lamp guide 14 is provided inside the appliance main body 10 and extends back and forth, and a lamp 15 is provided so as to be horizontally movable along this lamp guide 14. The lamp 15 includes a socket 16 and a lamp 1.
7, a reflecting plate 18, etc. Furthermore, a female thread 23 is provided at the front end of the motor storage case 13, and a male thread 19 is screwed into this female thread 23. As shown in FIG. 2, the front end of the male thread 19 is
The light fixture 15 is rotatably attached to the reflector mounting base 20 with mounting screws 21 . The rear end of the male screw 19 is placed inside the motor storage case 13. Third
Using the diagram and FIG. 4, motor storage case 13
I will explain about it. The motor storage case 13 is shaped like a cube, and the upper part has a wiring space 24.
It's getting old. Further, reference numeral 25 denotes a stepping motor that can rotate in both left and right directions, and a rectangular motor support plate 26 that is movably fitted along the inner circumferential surface of the motor storage case 13 is attached to the front surface of the stepping motor.
A rear end of a male thread 19 is fixed to a rotating shaft 30 of the motor 25. The inner peripheral surface of the motor storage case 13 serves as a motor guide 27, and the motor support plate 2
6 moves in contact with the motor guide 27, so it is made of synthetic resin with low frictional resistance, or if it is made of metal, the contact surface is rounded. Furthermore, limit switches are provided in the motor storage case 13 so that motor support plates 26 come into contact with both ends of the forward and backward movement range of the motor 25 to stop driving the motor 25.

When the motor 25 is driven to rotate, the male screw 19 screws through the female screw 23, and the lamp 15 moves into the lamp guide 14.
horizontally move back and forth along. Further, the motor 25 also moves forward and backward in parallel with the forward and backward movement of the lamp 15, and the motor support plate 26 comes into contact with the limit switches 28 and 29 to stop the motor 25, and the lamp 15 comes to the light condensing position or the light scattering position.

According to the lighting fixture configured in this manner, since the lamp 15 and the motor 25 move in parallel, the distance between them is always kept constant, and the motor 25 is not adversely affected by the heat of the lamp 17. Similarly, the limit switches 28 and 29 are also provided within the motor storage case 13 and are located away from the lamp 15, so that they are not adversely affected by the heat of the lamp 17. In this way, the motor 25 and limit switches 28, 2 can be operated without using a cooling fan or the like.
Heat-sensitive parts such as 9 can be protected from the heat of the lamp 17, and the structure is simple and compact. Moreover, the limit switches 28 and 29 are connected to the instrument body 10.
Since it is installed inside the motor storage case 13 at the rear of the
Compared to the conventional structure in which the lamp and the limit switch are stacked one above the other, the fixture can be further downsized.

In addition, the motor 25 and limit switches 28, 2
The motor storage case 13 containing the motor 9 can be used in common with other instrument bodies. In this case, for example, when the wattage of the lamp is high, a longer male screw 19 may be used in order to increase the distance between the lamp and the motor.

Furthermore, a motor 25 is installed inside the motor storage case 13.
Since the motor 25 and the limit switches 28, 29 are provided, the motor 25 and the limit switches 28, 29 are
It is possible to shorten the wires used to connect the parts, and the assembly work is easy.

Note that the limit switches 28 and 29 may be provided within the fixture body 10 and operated by directly coming into contact with the lamp 15, as in the example shown in FIG.

[Effect of idea]

According to the lighting device of claim (1), the lighting device and the motor are connected to each other via the male screw, and when the motor is rotationally driven to move the lighting device forward or backward, the motor also moves parallel to the lighting device. That is, the distance between the lamp and the motor is always kept constant, and the motor is not adversely affected by the heat of the lamp. in this way,
The motor can be protected from the heat of the lamp without using a cooling fan, and the structure is simple and compact.

According to the lighting device of claim (2), the limit switches that stop the rotation of the motor are provided at both ends of the range of forward and backward movement of the motor, so the limit switches are moved away from the lamp, and the lamp can be operated without a cooling fan or the like. Since it is less susceptible to the effects of heat, has a simple structure, and the limit switch is provided at the location where the motor is installed, the device can be further miniaturized.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of one embodiment of this invention, Fig. 2 is a partial sectional view thereof, Fig. 3 is a sectional view of the motor storage case, Fig. 4 is a - sectional view of Fig. 3, and Fig. 5 is a sectional view of the motor storage case. It is a sectional view of a conventional example. 10... Instrument body, 11... Irradiation opening, 14...
...Lamp guide, 15...Lamp, 19...Male thread, 23...Female thread, 25...Motor, 27...
Motor guide, 28, 29...limit switch.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A lamp guide having an irradiation opening formed in the front surface and extending back and forth toward the irradiation opening, and a motor guide extending in the direction of the irradiation opening behind the lamp guide. , a fixture body provided with a female thread located between the light guide and the motor guide; a light fixture provided to be movable forward and backward along the light guide; and a light fixture movable forward and backward along the motor guide. With a motor that can be
A lighting fixture comprising: a male screw having a front end rotatably connected to the lamp, a rear end fixed to the rotating shaft of the motor, and an intermediate portion screwed into the female screw. (2) The lighting device according to claim 1, further comprising a pair of limit switches for stopping rotation of the motor at both ends of a range of movement of the motor back and forth corresponding to a range of movement of the lamp back and forth.