CN110805839A

CN110805839A - Lighting device

Info

Publication number: CN110805839A
Application number: CN201810879968.4A
Authority: CN
Inventors: 陈辉; 八田和洋; 立野洋司
Original assignee: Panasonic Intellectual Property Management Co Ltd
Current assignee: Panasonic Intellectual Property Management Co Ltd
Priority date: 2018-08-03
Filing date: 2018-08-03
Publication date: 2020-02-18

Abstract

The present invention relates to a lighting device. The lighting device comprises a rotating assembly, a fixed assembly, a motor driving mechanism and a rotating shaft assembly, wherein the rotating assembly is provided with a light guide plate, the rotating assembly is connected with the fixed assembly through the rotating shaft assembly, so that the rotating assembly can rotate around the rotating shaft assembly relative to the fixed assembly within a preset range, and the motor driving mechanism is in transmission coupling with the rotating shaft assembly, so that the motor driving mechanism can drive the rotating assembly to rotate relative to the fixed assembly by driving the rotating shaft assembly. According to the invention, the posture of the rotating assembly provided with the light guide plate is adjustable, so that the light distribution of the lighting device is variable, and different light distribution requirements are further met.

Description

Lighting device

Technical Field

The present disclosure relates to lighting devices, and particularly to a lighting device with a rotatable light guide plate.

Background

In the conventional lighting device, a light guide plate is generally provided to make light emission uniform. However, in the prior art, the light guide plate in the lighting device is often fixed and the posture of the light guide plate is not adjustable, so that the light distribution of the lighting device is not changed and the lighting device cannot adapt to different light distribution requirements.

Disclosure of Invention

In view of the above-mentioned drawbacks of the prior art, an object of the present invention is to provide a lighting device with a light guide plate with adjustable posture.

Therefore, the invention provides the following technical scheme.

The invention provides a lighting device which comprises a rotating assembly, a fixed assembly, a motor driving mechanism and a rotating shaft assembly, wherein the rotating assembly is provided with a light guide plate, the rotating assembly is connected with the fixed assembly through a rotating shaft assembly, so that the rotating assembly can rotate around the rotating shaft assembly within a preset range relative to the fixed assembly, and the motor driving mechanism is in transmission connection with the rotating shaft assembly, so that the motor driving mechanism can drive the rotating assembly to rotate relative to the fixed assembly by driving the rotating shaft assembly.

In at least one embodiment, the fixing assembly is provided with a light guide plate.

In at least one embodiment, the number of the rotating assemblies is multiple, and the rotating assemblies are uniformly arranged around one fixed assembly.

In at least one embodiment, the rotating assembly is provided with a first installation part fixed on the light guide plate, the fixed assembly is provided with a second installation part matched with the first installation part, the rotating shaft assembly is fixedly arranged in the first installation part and partially extends into the second installation part, and the motor driving mechanism is arranged in the second installation part.

In at least one embodiment, two of the first mounting portions are provided on both sides of one of the second mounting portions so as to sandwich the second mounting portion, and each of the first mounting portion and the second mounting portion is connected by the rotating shaft assembly.

In at least one embodiment, the rotating shaft assembly includes a first shaft and a second shaft, the first shaft being rotatably connected with the second shaft with respect to the second shaft, the central axis of the first shaft is vertical to the central axis of the second shaft, the first shaft and the second shaft are respectively in transmission coupling with the corresponding motor driving mechanism, a motor drive mechanism corresponding to the first shaft can drive the first shaft to rotate so as to bring the rotating assembly to rotate around the central axis of the first shaft relative to the fixed assembly, and the motor driving mechanism corresponding to the second shaft can drive the second shaft to rotate so as to bring the rotating assembly to rotate around the central axis of the second shaft relative to the fixed assembly, so that the rotating assembly can rotate relative to the fixed assembly in two degrees of freedom.

In at least one embodiment, the motor driving mechanism includes a motor and a first transmission gear, an output shaft of the motor is provided with helical teeth, the first transmission gear is fixed to the rotating shaft assembly, so that the motor can drive the rotating shaft assembly through the matching of the helical teeth and the first transmission gear, and a central axis of the output shaft of the motor is perpendicular to a central axis of a shaft driven by the motor.

In at least one embodiment, a center axis of an output shaft of the motor is perpendicular to a center axis of the first transmission shaft.

In at least one embodiment, the motor driving mechanism includes a motor, a first transmission shaft, a first transmission gear, a first bevel gear and a second bevel gear, an output shaft of the motor is provided with spiral teeth, the first transmission gear and the first bevel gear are arranged on the first transmission shaft, the second bevel gear is arranged on the rotating shaft assembly, the motor can drive the first transmission shaft to rotate through the matching of the spiral teeth and the first transmission gear, then the rotating shaft assembly is driven to rotate through the matching of the first bevel gear and the second bevel gear, and the central axis of the output shaft of the motor is parallel to the central axis of the shaft driven by the motor.

In at least one embodiment, the light guide plate has a polygonal, circular, petal-shaped or butterfly-shaped shape; and/or; the fixing component is polygonal or circular in shape.

By adopting the technical scheme, the invention provides the lighting device, the light guide plate of the lighting device can rotate, so that the posture of the light guide plate can be adjusted, different light distributions can be obtained, in addition, the posture of the light guide plate can be automatically adjusted by arranging the motor driving mechanism, and the posture adjustment of the light guide plate is convenient and labor-saving.

Drawings

Fig. 1 shows a front view of a first embodiment of the lighting device of the present invention.

Fig. 2 shows a top view of the lighting device of fig. 1.

Fig. 3 shows a partially enlarged view of a portion a in fig. 2.

Fig. 4 shows a structural diagram of a motor drive mechanism of the lighting device in fig. 1.

Fig. 5 shows a front view of a second embodiment of the lighting device of the present invention.

Fig. 6 shows a top view of a third embodiment of the lighting device of the present invention.

Fig. 7 shows a structural view of a motor driving mechanism of the lighting device in fig. 6.

Fig. 8 is a front view showing one structure of a rotating shaft assembly for the lighting device of fig. 6.

Fig. 9 shows a right side view of fig. 8.

Fig. 10 shows a front view of another construction of a rotating shaft assembly for the lighting device of fig. 6.

Fig. 11 shows a right side view of fig. 10.

Fig. 12 shows a structural view of a motor in the motor drive mechanism in fig. 4 and 7.

Description of the reference numerals

1, rotating the assembly; 11 a first mounting portion; 2 fixing the component; 21 a second mounting portion; 3, a motor driving mechanism; 31 a motor; 311 an output shaft; 32 helical teeth; 33 a first drive gear; 34 a first drive shaft; 35 a first bevel gear; 36 a second bevel gear; 4 rotating the shaft assembly; 41 a first shaft; 42 a second shaft; 421 shaft sleeve; w width direction.

Detailed Description

Exemplary embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood that the detailed description is only intended to teach one skilled in the art how to practice the invention, and is not intended to be exhaustive or to limit the scope of the invention.

In summary, the present invention provides a lighting device including a rotating assembly, a stationary assembly, and a motor drive mechanism.

The fixing assembly is for fixing to, for example, a wall or ceiling.

The rotating assembly is provided with the light guide plate and is connected with the fixed assembly through the rotating shaft assembly, so that the rotating assembly can rotate in a preset range relative to the fixed assembly through the rotating shaft assembly.

The motor drive mechanism is in driving connection with the rotating shaft assembly, so that the motor drive mechanism can drive the rotating assembly to rotate relative to the fixed assembly by driving the rotating shaft assembly. Wherein "drive-coupled" means that the motor drive mechanism is capable of transmitting torque to the rotating shaft assembly such that the rotating shaft assembly rotates.

(first embodiment)

Fig. 1 shows a front view of a first embodiment of the lighting device of the present invention. As shown in fig. 1, a rotating assembly 1 is rotatably connected to a fixed assembly 2 via a rotating shaft assembly 4, and a motor driving mechanism (not shown) can drive the rotating shaft assembly 4 (in this embodiment, the rotating shaft assembly 4 includes only one rotating shaft) to rotate, so as to drive the rotating assembly 1 to rotate relative to the fixed assembly 2. Wherein, a light guide plate is arranged in the rotating assembly 1.

Fig. 2 shows a top view of fig. 1. As shown in fig. 2, the rotating member 1 has a rectangular shape as a whole and the rotating member 1 is provided with two first mounting portions 11 fixed to the light guide plate, the fixing member 2 has a rectangular shape as a whole and the fixing member 2 is provided with a second mounting portion 21 fitted with the first mounting portions 11, the two first mounting portions 11 sandwich the second mounting portion 21 in the width direction W and are disposed opposite to the second mounting portion 21 in the width direction W, so that the rotating member 1 and the fixing member 2 are substantially complementary in shape. The rotating shaft assembly 4 is fixedly arranged in the first mounting portion 11 and partially extends into the second mounting portion 21, and the motor driving mechanism 3 is mounted in the second mounting portion 21.

Fig. 3 shows a partially enlarged view of a portion a of fig. 2. As shown in fig. 3, the motor driving mechanism 3 is in transmission connection with the rotating shaft assembly 4, and the motor driving mechanism 3 can drive the rotating shaft assembly 4 to rotate, so as to drive the rotating assembly 1 to rotate relative to the fixed assembly 2. Preferably, the structure of the portion B and the structure of the portion a in fig. 2 are symmetrical with respect to the center line of the entire rotating unit 1 and the fixed unit 2 in the width direction W, that is, the motor drive mechanism 3 is also provided in the portion of the portion B of the second mounting portion 21, and the rotating shaft assembly 4 is fixedly provided in the first mounting portion 11 of the portion B (the rotating shaft assembly 4 includes only one rotating shaft in the present embodiment).

Fig. 4 shows a structural diagram of a motor drive mechanism of the lighting device in fig. 1. As shown in fig. 4, the motor drive mechanism 3 includes a motor 31, a first transmission shaft 34, a first transmission gear 33, a first bevel gear 35, and a second bevel gear 36. The output shaft 311 of the motor 31 is provided with spiral teeth 32, the first transmission gear 33 and the first bevel gear 35 are fixedly arranged on the first transmission shaft 34, the central axis of the output shaft 311 of the motor 31 is perpendicular to the central axis of the first transmission shaft 34, the second bevel gear 36 is fixedly arranged on the rotating shaft assembly 4, the motor 31 can drive the first transmission shaft 34 to rotate through the matching of the spiral teeth 32 and the first transmission gear 33, and then the rotating shaft assembly 4 is driven to rotate through the matching of the first bevel gear 35 and the second bevel gear 36. In this way, in the case where it is achieved that the center axis of the output shaft 311 of the motor 31 is parallel to the center axis of the rotating shaft assembly 4 so as not to change the torque output direction, the entire motor drive mechanism 3 is more compact in structure and can obtain a required gear ratio as needed, and thus a desired torque can be obtained.

By adopting the technical scheme, the rotating assembly 1 can rotate around the rotating shaft assembly 4 in a preset range on one degree of freedom relative to the fixed assembly 2 through the motor driving mechanism 3, so that the posture of the light guide plate of the rotating assembly 1 can be adjusted according to the expectation.

(second embodiment)

Fig. 5 shows a front view of a second embodiment of the lighting device of the present invention. The basic structures of the rotating assembly 1, the fixed assembly 2, the motor drive mechanism (not shown), and the rotating shaft assembly 4 in the lighting apparatus of this second embodiment are substantially the same as the basic structures of the rotating assembly 1, the fixed assembly 2, the motor drive mechanism 3, and the rotating shaft assembly 4 in the lighting apparatus of the first embodiment, respectively. As shown in fig. 5, there are two rotating assemblies 1, two rotating assemblies 1 are respectively rotatably connected to the fixed assembly 2 through a rotating shaft assembly 4, and a motor driving mechanism (not shown) can drive the rotating shaft assembly 4 to rotate so as to drive the rotating assemblies 1 to rotate relative to the fixed assembly 2.

Preferably, in the present embodiment, the two rotating assemblies 1 are symmetrically disposed with respect to the center line of the fixed assembly 2.

Similarly to the first embodiment, by adopting the above technical solution, it is possible to realize the rotation of the two rotating assemblies 1 respectively about the rotating shaft assembly 4 relative to the fixed assembly 2 by the motor driving mechanism 3 within a predetermined range of one degree of freedom, so that the postures of the light guide plates of the two rotating assemblies 1 can be adjusted as desired.

(third embodiment)

Fig. 6 shows a top view of a third embodiment of the lighting device of the present invention. As shown in fig. 6, the rotating members 1 are trapezoidal and four in number, and the four rotating members 1 are rotatably connected to the fixed member 2 through the rotating shaft members 4 (including one rotating shaft in the present embodiment), respectively. The fixed component 2 is circular, and the four rotating components 1 are uniformly arranged along the circumferential direction of the fixed component 2. A motor drive mechanism (not shown) can drive the rotating shaft assembly 4 to carry the rotating assembly 1 to rotate relative to the fixed assembly 2. Wherein, a light guide plate is arranged in the rotating assembly 1.

Fig. 7 shows a structural view of a motor driving mechanism of the lighting device in fig. 6. As shown in fig. 7, the motor driving mechanism 3 includes a motor 31 and a first transmission gear 33, a spiral tooth 32 is disposed on an output shaft 311 of the motor 31, the first transmission gear 33 is disposed on the rotating shaft assembly 4, the motor 31 can drive the rotating shaft assembly 4 to rotate by the matching of the spiral tooth 32 and the first transmission gear 33, and a central axis of the output shaft 311 of the motor 31 is perpendicular to a central axis of the rotating shaft assembly 4.

In this way, in the case where it is achieved that the center axis of the output shaft 311 of the motor 31 is perpendicular to the center axis of the rotating shaft assembly 4 to change the torque output direction, the entire motor drive mechanism is compact in structure and can obtain a required gear ratio as needed, and thus a desired torque can be obtained.

Similarly to the first embodiment, by adopting the above technical solution, it is possible to realize the rotation of the four rotating assemblies 1 respectively about the rotating shaft assemblies 4 relative to the fixed assembly 2 by a predetermined range in one degree of freedom by the motor drive mechanism 3, so that the postures of the light guide plates of the four rotating assemblies 1 can be adjusted as desired.

(modification example)

In the lighting device of the third embodiment, the rotating shaft assembly 4 may include the following modified structure.

Fig. 8 is a front view showing a structure of a rotation shaft assembly for the lighting device of fig. 6, and fig. 9 is a right side view of fig. 8. As shown in fig. 8 and 9, the rotating shaft assembly 4 includes a first shaft 41 and a second shaft 42, the second shaft 42 is fixedly provided with a shaft sleeve 421, and the first shaft 41 is provided on the shaft sleeve 421 in a manner of being rotatably connected with the second shaft 42. More specifically, one end of the first shaft 41 is rotatably disposed in the shaft sleeve 421, the other end of the first shaft 41 is fixedly connected with the rotating assembly 1, and the second shaft 42 is rotatably connected with the fixed assembly 1.

The central axis of the first shaft 41 is perpendicular to the central axis of the second shaft 42, the first shaft 41 and the second shaft 42 are respectively provided with the motor driving mechanism 3, the motor driving mechanism 3 corresponding to the first shaft 41 can drive the first shaft 41 to rotate so as to drive the rotating assembly 1 to rotate around the central axis of the first shaft 41 relative to the fixed assembly 2, and the motor driving mechanism 3 corresponding to the second shaft can drive the second shaft 42 to rotate so as to drive the rotating assembly 1 to rotate around the central axis of the second shaft 42 relative to the fixed assembly 2.

Preferably, the first shaft 41 and the second shaft 42 are both cylindrical shafts.

Further, fig. 10 shows a front view of another structure of a rotating shaft assembly for the lighting device of fig. 6, and fig. 11 shows a right side view of fig. 10. As shown in fig. 10 and 11, a central axis of the first shaft 41 is perpendicular to a central axis of the second shaft 42, an insertion hole is opened in the second shaft 42, and one end of the first shaft 41 is rotatably disposed in the insertion hole. The other end of the first shaft 41 is fixedly connected with the rotating assembly 1, and the second shaft 42 is rotatably connected with the fixed assembly 1.

By adopting the technical scheme, the rotating assembly 1 can rotate in a preset range on two degrees of freedom relative to the fixed assembly 2 around the rotating shaft assembly 4 through the motor driving mechanism 3, so that the posture of the light guide plate of the rotating assembly 1 can be better adjusted as expected.

Fig. 12 shows a structural view of a motor of the motor drive mechanism in fig. 4 and 7. As shown in fig. 12, the output shaft 311 of the motor 31 is provided with a helical tooth 32, so that the output shaft 311 of the motor 31 is formed as a lead screw.

By adopting the technical scheme, the lighting device provided by the invention has at least one of the following advantages:

(1) in the lighting device, the rotating assembly provided with the light guide plate is rotatably connected with the fixed assembly, so that the posture of the rotating assembly is adjustable, namely the posture of the light guide plate is adjustable, the light distribution of the lighting device is variable, and different light distribution requirements can be met;

(2) in the lighting device, the rotating assembly is rotationally connected with the fixed assembly through the rotating shaft assembly, and the motor driving mechanism is arranged to drive the rotating shaft assembly to rotate so as to drive the rotating assembly to rotate, so that the posture of the rotating assembly is adjusted simply and laborsavingly;

(3) in the lighting device, the rotating assembly provided with the light guide plate is rotatably connected with the fixed assembly through the first shaft and the second shaft, the central axis of the first shaft is perpendicular to the central axis of the second shaft, and the rotating assembly can rotate around the central axis of the first shaft and the central axis of the second shaft, so that the two-degree-of-freedom position adjustment of the rotating assembly is realized, and the diversity of light distribution can be further increased;

(4) in the lighting device, the rotating assembly is rotatably connected with the fixed assembly, so that the rotating assembly can be folded and retracted when the lighting device is installed, and the lighting device is convenient to install.

The above embodiments describe the technical solution of the present invention in detail, but it should be added that:

1. in each embodiment of the lighting device of the present invention, the fixing member may be provided with or without a light guide plate.

2. In each embodiment of the lighting device of the present invention, the shape of the light guide plate may be a polygon, a circle, a petal shape, or a butterfly shape.

3. In various embodiments of the lighting device of the present invention, the motor in the motor driving mechanism may be controlled to operate by a remote controller.

4. Although the structures of the motor drive mechanisms in the first and third embodiments of the lighting device described above are different, the present invention is not limited to this, and the motor drive mechanism used in the first embodiment of the lighting device and the motor drive mechanism used in the third embodiment may be interchanged, that is, the use of the motor drive mechanism may be selected according to actual circumstances, and in particular, the motor drive mechanisms respectively corresponding to the first shaft and the second shaft in the third embodiment may be different.

5. Although the fixing member is described as being circular in the above embodiments, the present invention is not limited thereto, and the fixing member may be polygonal.

6. Although it is defined in the above-described embodiment that the number of the rotating assemblies mounted to the fixed assembly is one, two, or four, the present invention is not limited thereto, and the number of the rotating assemblies may be set as needed in the actual situation, and may be three, five, six, or more.

7. Although it is described in the above-described modification that the center axis of the first shaft and the center axis of the second shaft are perpendicular to each other, the present invention is not limited thereto, and the angle formed between the center axis of the first shaft and the center axis of the second shaft may be set as needed.

8. The rotating shaft assembly can rotate on two degrees of freedom, and the fixing assembly can be provided with an additional rotating shaft, so that the rotating assembly can rotate on three degrees of freedom, light distribution of the lighting device is more diversified, and more light distribution requirements can be met.

Claims

1. A lighting device is characterized by comprising a rotating component, a fixed component, a motor driving mechanism and a rotating shaft component,

the rotating assembly is provided with a light guide plate, the rotating assembly is connected with the fixed assembly through a rotating shaft assembly so that the rotating assembly can rotate around the rotating shaft assembly within a preset range relative to the fixed assembly, and the motor driving mechanism is in transmission coupling with the rotating shaft assembly so that the motor driving mechanism can drive the rotating assembly to rotate relative to the fixed assembly by driving the rotating shaft assembly.

2. A lighting device as recited in claim 1, wherein said mounting assembly is provided with a light guide plate.

3. A lighting device as recited in claim 1, wherein said plurality of rotating assemblies are disposed uniformly around said one fixed assembly.

4. A lighting device as recited in any one of claims 1-3, wherein said rotating element is provided with a first mounting portion fixed to said light guide plate, said fixing element is provided with a second mounting portion engaging with said first mounting portion, said rotating shaft element is fixedly disposed in said first mounting portion and partially extends into said second mounting portion, and said motor drive mechanism is mounted in said second mounting portion.

5. The lighting device according to claim 4, wherein two of the first mounting portions are provided on both sides of one of the second mounting portions with the second mounting portion interposed therebetween, and each of the first mounting portions and the second mounting portion is connected by the pivot shaft assembly.

6. A lighting device as recited in any one of claims 1-3, the rotating shaft assembly includes a first shaft and a second shaft, the first shaft being connected to the second shaft in a rotatable manner with respect to the second shaft, the central axis of the first shaft is vertical to the central axis of the second shaft, the first shaft and the second shaft are respectively in transmission coupling with the corresponding motor driving mechanism, a motor drive mechanism corresponding to the first shaft can drive the first shaft to rotate so as to bring the rotating assembly to rotate around the central axis of the first shaft relative to the fixed assembly, and the motor driving mechanism corresponding to the second shaft can drive the second shaft to rotate so as to bring the rotating assembly to rotate around the central axis of the second shaft relative to the fixed assembly, so that the rotating assembly can rotate relative to the fixed assembly in two degrees of freedom.

7. A lighting device as recited in any one of claims 1-3, wherein said motor drive mechanism comprises a motor and a first transmission gear, an output shaft of said motor being provided with helical teeth, said first transmission gear being fixed to said rotatable shaft assembly such that said motor can drive said rotatable shaft assembly by engagement of said helical teeth with said first transmission gear, a central axis of an output shaft of said motor being perpendicular to a central axis of a shaft of said rotatable shaft assembly which it drives.

8. The lighting device according to any one of claims 1-3, wherein the motor driving mechanism comprises a motor, a first transmission shaft, a first transmission gear, a first bevel gear and a second bevel gear, an output shaft of the motor is provided with helical teeth, the first transmission gear and the first bevel gear are disposed on the first transmission shaft, the second bevel gear is disposed on the rotating shaft assembly, the motor can drive the first transmission shaft to rotate through the cooperation of the helical teeth and the first transmission gear, and then drive the rotating shaft assembly to rotate through the cooperation of the first bevel gear and the second bevel gear, and a central axis of the output shaft of the motor is parallel to a central axis of a shaft in the rotating shaft assembly driven by the motor.

9. The lighting device as defined in claim 8, wherein a central axis of the output shaft of the motor is perpendicular to a central axis of the first transmission shaft.

10. The lighting device according to claim 1, wherein the light guide plate has a polygonal, circular, petal-shaped or butterfly shape; and/or; the fixing component is polygonal or circular in shape.