JP2005353414A - Lighting system and light-diffusing type alarm lamp - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lighting system having an LED with high utilization efficiency and moreover, having high durability and a simple structure, and to provide a light-diffusing type alarm lamp. <P>SOLUTION: This lighting system 41 is provided with first, second and third fixing parts 7, 8 and 9; a light-emitting diode 11; a movable part 15 supporting a reflecting surface 13 for reflecting light, and supported turnably about a predetermined turning center axis 14; a support shaft 16 as a receiving part for turnably supporting the movable part 15; and an electric motor 17 for making the movable part 15 turn. The radiation direction of reflected light signal is changed, to enhance utilization efficiency of the LED 11. The support shaft 16 is disposed on a side opposite to the LED 11, by interposing the reflecting surface 13 in a direction along the predetermined rotation center axis 14; the electric motor 17 is disposed on the same side as that of the LED 11, with respect to the reflecting surface 13; and thereby power feed members 19 and 21 can be simplified and durability can be enhanced. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a lighting device for a diffused warning light used in an emergency vehicle or the like, and a diffused warning light using the same.

Some of the above-described lighting devices use a light emitting diode (hereinafter, also referred to as an LED) as a light source, and irradiate an optical signal around while changing an irradiation direction of the optical signal from the LED.
For example, there is a conventional first lighting device in which a large number of LEDs are dispersedly arranged on the outer peripheral surface of a cylindrical support member. A plurality of LEDs form a row along the vertical direction, and a large number of LEDs are arranged over the entire circumference at predetermined intervals in the circumferential direction. Only LEDs in a single vertical column or a plurality of adjacent columns are lit, and the lit columns are sequentially shifted to the right or left by several columns so that the light appears to rotate (for example, Patent Document 1). reference.).

  Further, in Patent Document 1, as a conventional second illumination device, a movable part that is rotatable around a predetermined axis with respect to a fixed part is provided, and an LED is provided on the movable part, or an LED is provided on the movable part. And a reflection member are described. The direction of light from the LED is changed by rotating the LED together with the movable part. Usually, a slip ring mechanism or the like is provided for supplying power to the LED provided in the movable portion.

Further, as a conventional third lighting device, a pair of fixed plates arranged vertically and opposite to each other, and a reflection rotatable about a predetermined axis extending along the vertical direction with respect to the fixed plates Some have a member, an electric motor fixed to the lower fixing plate for rotating the reflecting member, and an LED fixed to the upper fixing plate (see, for example, Patent Document 2).
JP 2000-315406 A JP-A-6-314509

However, in the conventional first lighting device, since the plurality of LEDs are respectively fixed in a predetermined light emitting direction, each LED can be used only for an optical signal in a corresponding light emitting direction, and the LED as a whole is used. Usage efficiency was low.
In the conventional second lighting device, the slip ring mechanism is likely to be worn and the durability is low. Therefore, only a part of the advantage of the long life of the LED can be enjoyed.

In the conventional third illuminating device, since the power supply members such as wiring for supplying power to the electric motor and the LED are divided into upper and lower parts, the structure is complicated.
Therefore, an object of the present invention is to provide an illumination device having a simple structure with high utilization efficiency of LEDs and high durability. Another object of the present invention is to provide a diffused warning light using such a lighting device.

  An illuminating device of the present invention is an illuminating device that irradiates an optical signal to the surroundings while changing the irradiation direction of the optical signal around a predetermined rotation center axis, and is fixed to the fixed portion and the fixed portion. At least one light-emitting diode and a reflecting surface that reflects light from the light-emitting diode toward the direction intersecting the predetermined rotation center axis are supported and rotatably supported around the predetermined rotation center axis The movable portion and a direction along the predetermined rotation center axis are arranged on the opposite side of the light emitting diode with the reflection surface interposed therebetween, and the movable portion is arranged around the predetermined rotation center axis. A receiving portion provided on the fixed portion for supporting the rotation, and a direction along the predetermined rotation center axis, and the movable portion disposed on the same side as the light emitting diode with respect to the reflecting surface. For turning Characterized in that it comprises a dynamic motor.

According to the present invention, an optical signal can be obtained by reflecting light from an LED on a reflecting surface. By rotating the reflecting surface with an electric motor, the irradiation direction of the optical signal can be changed. Thereby, since the optical signal from at least 1 LED can be emitted toward the surrounding wide range, the utilization efficiency of LED can be improved as the whole illuminating device.
In addition, since the LED and the electric motor are arranged on the fixed part on the same side with respect to the reflecting surface, the power supply members for supplying power to the LED and the electric motor can be simplified on the same side, and the structure of the lighting device can be reduced. It can be simplified. Further, since the LED is fixed to the fixing portion, the power feeding member is fixed and there is no possibility of causing wear or the like, and durability can be increased.

  Further, since the receiving portion is disposed on the opposite side of the LED with the reflecting surface interposed therebetween, the layout of the reflecting surface and the LED is not restricted by the receiving portion, and the reflecting surface and the LED can be laid out in a space efficient manner. This makes it possible to reduce the size of the lighting device. Further, when a plurality of LEDs are provided, it is possible to adopt a highly visible layout for the LED layout.

  Further, in the above-described configuration, an extension that is coaxially extended from the output shaft of the electric motor and can rotate integrally with the output shaft and extends in an oblique direction with respect to the predetermined rotation center axis. An installation shaft, a small-diameter drive roller provided so as to rotate integrally with the extension shaft, and an outer periphery driven by frictional engagement with the outer periphery of the drive roller, and can rotate integrally with the movable portion. It is preferable to further include a transmission mechanism including a large-diameter driven rotor. In this case, since the drive roller can be arranged on the predetermined rotation center axis side of the output shaft of the electric motor by way of the obliquely extending shaft, the driven rotor can be reduced in diameter, and the lighting device can be reduced. The size can be further reduced.

  In the above configuration, it is preferable that the fixed portion includes a metal member, and the light emitting diode is attached to the fixed portion directly or indirectly through a heat conducting member so as to be capable of conducting heat. In this case, since the heat generated by the light emitting diode when energized can be effectively released, the temperature rise of the light emitting diode can be suppressed. Therefore, for example, it is possible to improve the visibility of the optical signal by the high-intensity light emitted when the large current is applied while maintaining the long life of the light emitting diode by suppressing the temperature rise of the light emitting diode when the large current is applied.

  In addition, the diffused warning light of the present invention includes a plurality of the above-described lighting devices, a base that includes a metal member that supports the plurality of lighting devices in common, and can be attached to a vehicle, and is attached to the base for illumination. A light-transmitting glove covering the device, wherein the fixing portion of each lighting device is attached to the base directly or indirectly through a heat conducting member so as to be capable of conducting heat. To do. According to the present invention, even if the temperature of the light emitting diode tends to rise due to being covered with the globe, the heat generated by the light emitting diode of the lighting device when energized can be effectively released through the base. Temperature rise can be suppressed. Therefore, for example, while maintaining the long life of the light emitting diode by suppressing the temperature rise of the light emitting diode when energized with a large current, the visibility of the light signal of the diffused warning light by the high-intensity light emitted when energizing the large current Can be increased.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings. In the present embodiment, the lighting device will be described in the case where it is applied to a vehicle-mounted diffused warning light. However, the lighting device can also be applied to, for example, a stationary display lamp.
FIG. 1 is a partial cross-sectional front view of a diffused warning light having the illumination device of the present invention.
The diffused warning light 1 is installed on a vehicle roof 2 (a part of which is shown by a one-dot chain line in FIG. 1), and emits an optical signal in all surrounding directions. The light-diffusing warning light 1 has a linear outer shape that is long in one direction, and the roof 2 is connected via a plurality of, for example, two mounting members 3 in a state in which the longitudinal direction thereof is along the left-right direction X of the vehicle. Fixed to. Here, the left-right direction X of the vehicle is a direction orthogonal to the traveling direction of the vehicle (also referred to as the front-rear direction Y), and is also the width direction of the vehicle.

In the following, the direction will be described with reference to the mounting state on the vehicle. Also, in each drawing, the left-right direction X, the front-rear direction Y, and the up-down direction Z of the vehicle are illustrated as necessary.
The diffused warning light 1 includes a plurality of, for example, four illumination devices 4, a base 5 that supports the plurality of illumination devices 4 in common, and an upper portion of the base 5 attached to the base 5 and the illumination device 4. And a translucent glove 6 covering the.

  The base 5 is formed in an elongated plate shape along the longitudinal direction by an aluminum extruded member as a metal member. The base 5 supports a plurality of lighting devices 4 in common. The above-described mounting member 3 is fixed to the lower part of the base 5 and can be mounted on the vehicle via the mounting member 3. A sealing material (not shown) is provided at the peripheral edge of the base 5, sealing between the peripheral edge of the base 5 and the globe 6 to prevent rainwater from entering the globe 6.

The plurality of lighting devices 4 are arranged in the longitudinal direction of the diffused warning light 1 and attached to the upper part of the base 5. The some illuminating device 4 is comprised similarly.
FIG. 2 is a front view of the lighting device. FIG. 3 is a plan view of the lighting device. FIG. 4 is a side view of the lighting device. First, FIG. 2 and FIG. 3 will be referred to.
The lighting device 4 includes a first fixing portion 7 fixed to the base 5, a second fixing portion 8 disposed above the first fixing portion 7, and the first and second fixing portions 7. , 8 and a third fixing portion 9 disposed on the side.

In addition, the lighting device 4 includes a plurality of, for example, six light source units 10 that are fixed to the first fixing portion 7. Each light source unit 10 includes a light emitting diode 11 (only part of which is shown) and a lens 12. Each light source unit 10 emits light upward.
The illuminating device 4 has a reflection surface 13 for reflecting the light from the LED 11 and transmitted through the lens 12, and a reflection surface 13 that carries the reflection surface 13 around the predetermined rotation center axis 14. And a support shaft 16 as a receiving portion fixed to the second fixed portion 8 in order to rotatably support the movable portion 15. The axis of the support shaft 16 is disposed substantially at the center position of the illumination device 4 in plan view and extends in the vertical direction, and corresponds to the predetermined rotation center axis 14 described above.

The lighting device 4 also has an electric motor 17 for rotating the movable portion 15 and a transmission mechanism 18 that transmits the rotational movement of the output shaft 17 a of the electric motor 17 to the movable portion 15.
Each LED 11 is connected to a drive circuit 20 via a power supply member 19 such as an electric wire. The electric motor 17 is connected to a drive circuit 22 via a power supply member 21 such as an electric wire.
By driving the electric motor 17, the reflecting surface 13 is rotated around a predetermined rotation center axis 14, and the irradiation direction D (see FIG. 4) of the optical signal from the LED 11 is changed to the predetermined rotation center axis 14. The optical signal can be irradiated over the entire circumference while changing around the optical signal to obtain an optical signal composed of rotating light.

  With reference to FIG. 4, in the present embodiment, the support shaft 16 has the reflecting surface 13 with respect to the LED 11 in the direction along the predetermined rotation center axis 14 (corresponding to the vertical direction Z in the present embodiment). It is arranged on the opposite side across. On the other hand, the electric motor 17 is disposed on the same side as the LED 11 with respect to the reflecting surface 13 in the direction along the predetermined rotation center axis 14. Specifically, the LED 11 and the electric motor 17 are disposed below the reflecting surface 13, and the support shaft 16 is disposed above the reflecting surface 13.

The first fixing portion 7 is a metal member as a good heat conductor, for example, a plate-like member containing an aluminum alloy, and is fixed to the base 5 with screws. The first fixing part 7 supports the light source unit 10.
Referring to FIGS. 3 and 4, the second fixing portion 8 is attached to a plurality of column members 23 extending in the vertical direction, and a plurality of connection portions 24 to upper ends of the plurality of column members 23. And a single top plate 25. The column member 23 is disposed around the first fixing portion 7, and the lower end portion of the column member 23 is fixed to the base 5 by screwing (not shown). The upper end of the column member 23 is fixed to the connecting portion 24 with screws (not shown). The top plate 25 is formed in a rectangular shape, and four connection portions 24 are extended from the four corners of the rectangle toward the corresponding column members 23. The four connecting portions 24 and the top plate 25 are integrally formed, and as a whole, have an H shape in plan view. The second fixed portion 8 supports the movable portion 15.

The support shaft 16 is fixed to the central portion of the top plate 25. The support shaft 16 rotatably supports the movable portion 15 via a bearing 26. As the bearing 26, an annular rolling bearing or a sliding bearing can be used. The support shaft 16 passes through the bearing 26 and restricts the movement of the bearing 26 in the axial direction and the radial direction of the support shaft 16.
The third fixing portion 9 supports a part of the electric motor 17 and the transmission mechanism 18.

The movable portion 15 includes a cylindrical portion 27 that is concentric with the support shaft 16, a disk portion 28 that extends radially outward from the outer periphery of the cylindrical portion 27, and extends downward from the lower surface of the disk portion 28. A plurality of pillar portions 29 and an inclined plate portion 30 that is supported by the disc portion 28 via the pillar portions 29 and is inclined with respect to a predetermined rotation center axis line 14 are provided.
The inner periphery of the cylindrical portion 27 holds the bearing 26 in a press-fit state, and locks the bearing 26 in the axial direction and the radial direction of the support shaft 16. The cylinder part 27 and the disk part 28 are integrally formed.

The central portion of the inclined plate portion 30 intersects the predetermined rotation center axis line 14 and the lower surface of the inclined plate portion 30 is inclined with respect to the predetermined rotation center axis line 14 at a predetermined angle, for example, 45 degrees.
The reflection surface 13 is formed in a planar shape on the lower surface of the inclined plate portion 30 by aluminum vapor deposition. The reflection surface 13 receives light along the vertical direction from below and intersects with a predetermined rotation center axis 14, specifically, a horizontal direction (corresponding to the irradiation direction D) that is an orthogonal direction. Reflect toward you.

The light source unit 10 is arranged directly below the reflection surface 13 so as to overlap a part of the reflection surface 13 inside the outline of the reflection surface 13 in plan view.
The lens 12 of the light source unit 10 is provided to convert light emitted from the LED 11 within a predetermined angle range into parallel light parallel to the optical axis 12b passing through the focal point 12a.
Each LED 11 emits light radially, and the direction in which the light is the strongest among the light emitting directions is set. Each LED 11 is arranged such that the light is emitted upward along the vertical direction Z in the direction in which the light is strongest. Further, by transmitting the light from the LED 11 to the lens 12, the light transmitted through the lens 12 is substantially parallel light along the direction in which the above-mentioned light is strongest.

  Each LED 11 is attached to the first fixing portion 7 via a heat conducting member 36 so as to be indirectly heat conducting. Further, the first fixing portion 7 is attached to the base 5 via a heat conducting member 37 so as to be able to conduct heat indirectly. The heat generated by the LED 11 can be efficiently released to the base 5 through the heat conducting member 36, the first fixing portion 7 and the heat conducting member 37. As the heat conducting members 36 and 37, a good heat conductor, for example, a heat conducting sheet, a heat conducting grease or the like can be used.

FIG. 5 is a perspective view of the electric motor 17 and the transmission mechanism 18. Please refer to FIG. 5 and FIG. The electric motor 17 is composed of, for example, a brushless motor, and the drive circuit 22 can continuously rotate the output shaft 17a in one predetermined direction.
The electric motor 17 is swingably supported by the third fixing portion 9. That is, the third fixing portion 9 supports a swing support portion 32 that can swing around the axis 31 a of the support shaft 31 via a pair of support shafts 31. The support shaft 31 extends along the front-rear direction, which is a direction parallel to the direction orthogonal to the predetermined rotation center axis 14. A motor housing 17b of the electric motor 17 is fixed to the swing support portion 32 so as to be integrally movable, and an output shaft 17a of the electric motor 17 extends upward. A tension coil spring 33 is interposed between the swing support portion 32 and the third fixing portion 9. The tension coil spring 33 functions as an urging means that urges the oscillating support portion 32 in the oscillating direction such that the output shaft 17a is displaced toward the predetermined rotation center axis 14 side.

The transmission mechanism 18 extends coaxially from the output shaft 17a of the electric motor 17 and can extend integrally with the output shaft 17a. The transmission mechanism 18 has a small diameter that can rotate integrally with the extended shaft 34. Drive roller 35 and the above-described disk portion 28 as a large-diameter driven rotor that is driven by the drive roller 35 and can rotate integrally with the movable portion 15.
In this embodiment, the disk portion 28 as a driven rotor has an outer periphery 28 a that is driven by frictional engagement with an outer periphery 35 a of the drive roller 35.

  The extending shaft 34 is formed integrally with the output shaft 17a of the electric motor 17 and constitutes a long shaft. The extending shaft 34 extends in the axial direction from the output shaft 17a. In a state where the swing support portion 32 is urged by the tension coil spring 33, the extended shaft 34 extends obliquely with respect to the predetermined rotation center axis 14, and a drive roller at the tip of the extended shaft 34. 35 is pressed against the outer periphery 28 a of the disk portion 28.

When the driving roller 35 frictionally engages with the driven rotor described above, it is possible to prevent the occurrence of noise such as a meshing sound and a rattling sound generated in the case of a gear, and to reduce the operation sound.
Thus, according to this embodiment, the light from the LED 11 can be transmitted through the lens 12 and reflected by the reflecting surface 13 to obtain an optical signal. By rotating the reflecting surface 13 by the electric motor 17, the irradiation direction D of the optical signal can be changed. Thereby, since the optical signal from LED11 can be emitted toward the circumference | surroundings wide range, for example, all the circumference | surroundings, the utilization efficiency of LED11 can be improved as the illuminating device 4 whole. For example, it is also possible to obtain a small number of light signals with a high visibility, for example, at least one LED 11 with a high visibility.

  Further, since the LED 11 and the electric motor 17 are disposed on the first and third fixing portions 7 and 9 on the same side with respect to the reflecting surface 13, the power supply members 19 and 21 for supplying power to the LED 11 and the electric motor 17. Can be simplified on the same side, and the structure of the lighting device 4 can be simplified. Moreover, since LED11 is fixed to the 1st fixing | fixed part 7, the electric power feeding member 19, such as an electric wire, is fixed, there is no possibility that an abrasion, fatigue destruction, etc. may be produced, and durability can be made high.

In addition, a light-emitting diode usually has a long life, and usually has a highly directional light-emitting characteristic, and focuses light on a person at a predetermined position in the surrounding area for visual recognition. It is preferable for enhancing the properties. Even if the directivity is high, it is possible to efficiently obtain high visibility over the entire circumference by changing the light emitting direction using the rotating reflecting surface 13.
In addition, since the support shaft 16 as a receiving portion is disposed on the opposite side of the LED 11 with the reflecting surface 13 in between, the layout of the reflecting surface 13 and the LED 11 does not need to be regulated by the receiving portion. The LEDs 11 can be laid out in a space efficient manner, and the lighting device 4 can be downsized. For example, the LED 11 can be disposed at a position where the predetermined rotation center axis 14 passes, and space efficiency can be increased as compared with the case where the LED 11 is disposed only at a position shifted from the rotation center axis 14.

  In addition, when a plurality of LEDs 11 are provided, a highly visible layout can be adopted as the layout of the LEDs 11. For example, the LED 11 can be arranged at a position where a predetermined rotation center axis 14 passes and a plurality of positions having an annular shape centered on this position (see FIG. 3), and the optical signal is compared with the hollow annular light. It is also possible to make it look like planar light with high visibility. As a result, visibility can be further improved.

  Further, in the transmission mechanism 18 described above, the drive roller 35 can be disposed on the side of the predetermined rotation center axis 14 with respect to the output shaft 17a of the electric motor 17 by way of the obliquely extending shaft 34. The rotor can be reduced in diameter, and the illumination device 4 can be further reduced in size. For example, when the electric motor 17 is disposed at a position farther from the predetermined rotation center axis 14 than the LED 11 and the reflecting surface 13, the radial size of the driven rotor in contact with the drive roller 35 is set as the movable portion 15. It can be the same level or smaller than the movable part 15.

  Moreover, since LED11 is attached to the 1st fixing | fixed part 7 containing a metal member so that heat conduction is possible, since the heat | fever which LED11 emits at the time of electricity supply can be escaped effectively, the temperature rise of LED11 is suppressed. be able to. Therefore, for example, the visibility of an optical signal can be enhanced by high-intensity light emitted during energization of a large current while suppressing the temperature rise of the LED 11 during energization of a large current and maintaining the long life of the LED 11.

  Moreover, in the diffuse type warning light 1 of this embodiment, the 1st fixing | fixed part 7 of each illuminating device 4 is attached to the base 5 so that heat conduction is possible. Thereby, even if it is covered with the globe 6 and the temperature of the LED 11 tends to rise, the heat generated by the LED 11 of the lighting device 4 when energized can be effectively released through the base 5, so that the temperature of the LED 11 rises. Can be suppressed. Therefore, for example, while maintaining the long life of the LED 11 by suppressing the temperature rise of the LED 11 when energized with a large current, the visibility of the optical signal of the diffused warning light 1 is enhanced by the high-intensity light emitted when energizing the large current. be able to.

Moreover, LED11 is attached to the 1st fixing | fixed part 7 containing a metal member so that heat conduction is possible, and the 1st fixing | fixed part 7 of the illuminating device 4 is attached to the base 5 so that heat conduction is possible. Thus, the temperature rise of the LED 11 can be more effectively suppressed.
Further, by using a brushless motor such as a stepping motor for the electric motor 17, the maintenance-free illumination device 4, and hence the diffused warning light 1, can be realized.

Further, the disk portion 28 of the movable portion 15 functions as a driven rotor of the transmission mechanism 18, and at least a part of the movable portion 15 and the transmission mechanism 18 are integrated. Thereby, an assembly man-hour can be reduced and weight reduction can be achieved.
Further, by supporting the electric motor 17 so as to be able to swing, the inclination angle of the extending shaft 34 with respect to the predetermined rotation center axis 14 can be adjusted. In addition to this, screw holes (not shown) as fixing portions for attaching the third fixing portion 9 are provided at a plurality of locations so as to be selectable, and the electric motor 17 has a distance from a predetermined rotation center axis 14. When it is possible to adjustably fix the base 5, the mounting position of the electric motor 17 can be varied according to the size and number of the LEDs 11. Thereby, for example, when a larger number of LEDs 11 are used, the electric motor 17 can be fixed to the base 5 while being shifted in a direction away from the predetermined rotation center axis 14. Furthermore, the obliquely extending shaft 34 can transmit the rotational force from the electric motor 17 to the driven rotor without blocking the light from the LED 11.

Moreover, the following modifications can be considered about this embodiment. In the following description, differences from the above-described embodiment will be mainly described, description of similar configurations will be omitted, and in the case of illustration, corresponding parts are denoted by the same reference numerals.
For example, the base 5 may be directly attached to the vehicle. Moreover, the base 5 is comprised by the some member, and at least 1 of the some members may contain the metal member which supports the some illuminating device 4 in common. Moreover, as the above-described metal member of the base 5 and the first fixing portion 7, iron or the like may be used in addition to aluminum.

Further, at least two portions of the first, second and third fixing portions 7 to 9 may be formed integrally with each other. It is also conceivable to form a fixed portion that supports the LED 11 and the electric motor 17 integrally with the base 5.
It is also conceivable to eliminate at least one lens 12. Moreover, although the several light source unit 10 was provided, at least one may be provided.

If there is no problem with the heat dissipation of the LED 11, it may be considered that at least one of the heat conducting members 36 and 37 is eliminated. For example, you may attach each LED11 in the state which carried out the surface contact directly to the 1st fixing | fixed part 7, so that heat conduction is possible. Moreover, you may attach the 1st fixing | fixed part 7 so that heat conduction is possible in the state which was in surface contact with the base 5 directly.
FIG. 6 is a cross-sectional view showing a modification of the movable portion 15 and the second fixed portion 8.

  In the above-described embodiment, the support shaft 16 is fixed to the second fixed portion 8 and the bearing 26 is held by the movable portion 15, but conversely, as shown in FIG. The bearing 26 may be held by the second fixing portion 8. In this case, the support shaft 26 rotates integrally with the movable portion 15, extends along the predetermined rotation center axis 14, and is supported by the second fixed portion 8 via the bearing 26. The second fixing portion 8 is formed with a receiving seat 39 as a receiving portion for receiving the bearing 26. Further, the receiving seat 39 may be formed and fixed separately from the second fixing portion 8, and the receiving seat 39 may be provided on the second fixing portion 8.

It is also conceivable to use a DC motor as the electric motor. In the above-described embodiment, the electric motor 17 is continuously rotated in one direction. However, each time the electric motor 17 is rotated by a predetermined angle, for example, 360 degrees, the rotation direction is reversed and the electric motor 17 can be reciprocally rotated. Conceivable.
The extending shaft 34 of the transmission mechanism 18 may be considered to extend parallel to the predetermined rotation center axis 14. The extended shaft 34 may be formed separately from the output shaft 17a of the electric motor 17 and may be coupled to the output shaft 17a so as to be integrally rotatable.

  In the modification shown in FIG. 7, the transmission mechanism 18 </ b> A has an annular driven rotor 40 that is fixed via a support member 41 below the reflecting surface 13 and rotates integrally with the movable portion 15. The driving roller 35 fixed to the output shaft 17a of the electric motor 17 is frictionally engaged with the outer periphery 40a of the driven rotor 40, and the extending shaft 34 is abolished. The support member 41 extends downward from the outer peripheral edge portion of the inclined plate portion 30, and the portion of the outer peripheral edge portion that is below the intersection of the reflecting surface 13 and the predetermined rotation center axis 14. It is extended. The light from the light source unit 10 reaches the reflection surface 13 through the inside of the driven rotor 40.

In the above-described embodiment, the disk portion 28 is formed integrally with the driven rotor. However, a member (not shown) that functions as the driven rotor is formed separately from the movable portion 15, so that the movable portion 15 may be connected to be integrally rotatable.
The tension coil spring 33 as the biasing means has one end engaged with the third fixing portion 9 and the other end engaged with at least one of the swing support portion 32 and the electric motor 17 to swing. The dynamic support portion 32 and the electric motor 17 may be urged in the swing direction with respect to the disc portion 28. The tension coil spring 33 is used as the biasing means, but is not limited to this. For example, a spring component such as a torsion coil spring (not shown) or a leaf spring may be used as the biasing means. One end of these spring parts is engaged with the second fixing part 8, and the other end of the spring part is engaged with at least one of the swing support part 32 and the electric motor 17. The plate portion 28 can be urged in the swinging direction. In addition, various design changes can be made within the scope of matters described in the claims.

It is a partial cross section front view of a diffuse type warning light provided with the illuminating device of one Embodiment of this invention. It is the front view to which the illuminating device of FIG. 1 was expanded. It is the top view to which the illuminating device of FIG. 1 was expanded. It is the side view to which the illuminating device of FIG. 1 was expanded. It is a perspective view of the 3rd fixed part, electric motor, etc. of FIG. It is sectional drawing of the modification of a receiving part. It is a schematic diagram of the modification of a transmission mechanism.

Explanation of symbols

1 Diffuse warning light 2 Roof (vehicle)
DESCRIPTION OF SYMBOLS 4 Illuminating device 5 Base 6 Globe 7 1st fixing | fixed part 8 2nd fixing | fixed part 9 3rd fixing | fixed part 11 Light emitting diode 13 Reflecting surface 14 Predetermined rotation center axis 15 Movable part 16 Supporting shaft (receiving part)
17 Electric motor 17a (Electric motor) output shaft 18, 18A Transmission mechanism 28 Disc (driven rotor)
28a outer periphery 34 extending shaft 35 drive roller 35a outer periphery 36, 37 heat conduction member 39 receiving seat (receiving portion)
40 Followed rotor 40a Outer circumference D Optical signal irradiation direction (crossing direction)

Claims (4)

An illumination device that irradiates an optical signal to the surroundings while changing the irradiation direction of the optical signal around a predetermined rotation center axis,
A fixed part;
At least one light emitting diode fixed to the fixing part;
A movable part that carries a reflection surface that reflects light from the light emitting diode in a direction intersecting the predetermined rotation center axis and is rotatably supported around the predetermined rotation center axis;
With respect to the direction along the predetermined rotation center axis, it is disposed on the opposite side of the light emitting diode with the reflection surface interposed therebetween, and supports the movable part so as to be rotatable around the predetermined rotation center axis. A receiving part provided in the fixing part for
An illuminating device comprising: an electric motor disposed on the same side as the light-emitting diode with respect to the reflecting surface in a direction along the predetermined rotation center axis to rotate the movable portion. .   The lighting device according to claim 1, wherein the lighting device is coaxially extended from the output shaft of the electric motor and can rotate integrally with the output shaft, and extends in an oblique direction with respect to the predetermined rotation center axis. An extending shaft, a small-diameter driving roller provided so as to rotate integrally with the extending shaft, and an outer periphery driven by frictional engagement with the outer periphery of the driving roller, An illumination device further comprising a transmission mechanism including a large-diameter driven rotor capable of rotating integrally.   3. The lighting device according to claim 2, wherein the fixing portion includes a metal member, and the light emitting diode is attached to the fixing portion so as to be capable of conducting heat directly or indirectly through a heat conducting member. A lighting device characterized by the above.   A plurality of lighting devices according to any one of claims 1 to 3, a base that includes a metal member that supports the plurality of lighting devices in common and can be attached to a vehicle, and the lighting device attached to the base A light-transmitting glove for covering, and the fixing portion of each lighting device is attached to the base directly or indirectly through a heat conducting member so as to be capable of conducting heat. Type warning light.

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