An automatically following lighting fixture

Abstract

This application relates to the field of lighting devices, and proposes an automatically following lighting fixture, which includes a light-emitting part, a monitoring part and a driving part. The light-emitting part is provided with a light-emitting body capable of generating a certain light intensity in a certain direction. The monitoring part can at least monitor a first area or an initial area by arranging a plurality of sensors. The light-emitting part is provided with a first rotating shaft and can rotate around the first rotating shaft. The driving part is provided with an electromagnet, and the driving of the light-emitting part is realized by the attraction or repulsion of the electromagnet. The light-emitting part rotates around the first rotating shaft from the initial illumination area to the first illumination area or from the first illumination area to the initial illumination area under the drive of the driving part. The automatic following lighting function is realized by using a simple electromagnet driving structure and sensors, and it can be used in large rooms such as meeting rooms, living rooms, etc. or large outdoor places such as squares or roads. This solution does not require a position sensor for positioning, and the stability of the lighting fixture is also improved.

Description

Technical Field

[0001] This application relates to the field of lighting devices, and particularly to an automatically following lighting fixture. Background Art

[0002] Existing lighting fixtures are usually fixed at a certain angle and have a certain irradiation direction, that is, the light intensity is higher in a certain direction. Especially for fixtures with a reflector, their directivity is more obvious. Some LED lights also have obvious directivity, that is, the light intensity is higher directly in front of the lamp beads, and the light intensity in the oblique front decreases as the angle increases, and there is basically no light on the back. Thus, if the area is large, usually multiple lighting fixtures need to be set up to ensure the uniformity of light. Controlling and installing multiple fixtures is rather troublesome, and if only one fixture is set, it is difficult to ensure the light intensity at each position.

[0003] Some lighting fixtures are provided with an automatic following function, but their structures are relatively complex, requiring the use of complex transmission structures, resulting in higher costs. Additionally, if complex transmission structures are used, the working performance is also unstable, and a position monitoring device needs to be set up. The failure of any structure may cause the failure of the entire structure's function, resulting in the product not working properly.

[0004] The Chinese patent number "CN109469859B" with the patent name "An LED street lamp capable of following irradiation" discloses a following irradiation street lamp. The monitoring component includes several infrared sensors arranged around the base, and all infrared sensors are electrically connected to the controller, thus realizing the control of the LED lamp. Its transmission structure is relatively complex and the cost is high. The monitoring range of the infrared sensors is large, and there may be an overlapping phenomenon in the monitoring areas between the sensors, and it also does not provide a solution to the problem of separating the monitoring areas of the sensors.

[0005] The Chinese patent number "CN112576995A" with the patent name "An intelligent street lamp that automatically follows pedestrians" discloses a street lamp that can follow pedestrians to reflect light. It also has the problems of complex structure, poor product stability, high cost, and poor market demand.

[0006] The Chinese patent number "CN114508731B" with the patent name "A street lamp electric energy interaction system" discloses a following lighting system, which realizes following the rotation of pedestrians by providing a laser sensor. It does not disclose the details of the sensor setting. If only one laser sensor is designed, it is difficult to achieve the purpose of full-range monitoring, and the design of the driving part is relatively complex and the cost is also high.

[0007] The Chinese patent number "CN117769096A" and the patent named "A Device, Method and Storage Medium for Lights to Follow a Target's Movements" disclose a lighting following device. Since it realizes this function through software algorithms, although the accuracy is relatively high, the cost is also relatively high, making it not suitable for use in ordinary home occasions or ordinary street lamp structures. Summary of the Invention

[0008] This application provides an automatically following lighting fixture to achieve the function of following a person's movement through a simple structure.

[0009] According to this application, an automatically following lighting fixture includes a light-emitting part, a monitoring part, and a driving part. The light-emitting part is provided with a light-emitting body capable of generating a certain light intensity in a certain direction. The monitoring part can at least monitor a first area or an initial area by arranging a plurality of sensors. The light-emitting part is provided with a first rotating shaft and can rotate around the first rotating shaft. The driving part is provided with an electromagnet, and the driving of the light-emitting part is realized by the attraction or repulsion of the electromagnet. The light-emitting part rotates around the first rotating shaft under the drive of the driving part from irradiating the initial area to irradiating the first area or from irradiating the first area to irradiating the initial area.

[0010] Compared with the prior art, the automatically following lighting fixture of this application has the following beneficial effects:

[0011] An automatically following lighting function is realized by using a simple electromagnet driving structure and sensors, and it can be used in relatively large rooms such as meeting rooms, living rooms, etc., or relatively large outdoor places such as squares or roads. Although the lighting fixture has a relatively large irradiation range, the irradiation intensity in a certain direction is relatively high. If people gather in a certain direction, providing more lighting in this direction can improve the utilization of electric energy. This application realizes the lighting of different areas by rotating the light-emitting part. For relatively small spaces, only two irradiation areas can be set, and for relatively large spaces, more irradiation areas can be set, so that the light intensity of the irradiated area is higher and a better lighting effect is obtained. This solution does not require a position sensor for positioning, nor does it require a complex chip to control the rotation of the lighting fixture. Compared with the prior art, the cost is greatly reduced, and the stability of the lighting fixture is also improved.

[0012] In an implementable embodiment, the sensor is an infrared sensor capable of monitoring infrared light. The sensor includes a first sensor and a second sensor. The monitoring area includes a first area and a second area, which are located on both sides of the initial area. The first sensor is provided with a first partition, and the second sensor is provided with a second partition. The first partition limits the monitoring range of the first sensor to the first area, and the second partition limits the monitoring range of the second sensor to the second area. The initial area may not be provided with a sensor. The two sensors can achieve the control of three areas. In this way, when there are no monitored personnel in the first area and the second area, it can be automatically reset. In some embodiments, the sensor can rotate following the light-emitting part. The first area, the second area, and the initial area are designed with the same angular range. In this way, people can be monitored in the non-irradiated areas. That is, when the light-emitting part rotates to irradiate the first area, the second sensor rotates to monitor the initial area and the second area. If active personnel are detected in these areas, the light-emitting part automatically rotates a certain angle under the action of the driving part to achieve following illumination.

[0013] In an implementable embodiment, the driving part includes a first electromagnet and a second electromagnet, and a number of permanent magnets corresponding to the first electromagnet and the second electromagnet. The first electromagnet and the second electromagnet can generate electromagnetic force to adsorb or repel the permanent magnets when energized forward or backward. The first electromagnet and the second electromagnet are fixed on the light-emitting part, or the permanent magnets are fixed on the light-emitting part and rotate synchronously with the light-emitting part. A pair of electromagnets and permanent magnets can only achieve the control of two positions, and two pairs of electromagnets can achieve the control of three positions, and smaller areas can be divided to make the control direction more accurate.

[0014] In an implementable embodiment, the light-emitting part is provided with a second rotating shaft so that the light-emitting part can rotate around the second rotating shaft. The light-emitting part rotates around the second rotating shaft from irradiating the initial area to irradiating the fourth area or from irradiating the initial area to irradiating the third area under the drive of the driving part. The switching function of three positions can be achieved along the first rotating shaft. Similarly, only along the second rotating shaft, the switching of three irradiation positions can be achieved. The rotation control along the first rotating shaft and the second rotating shaft at the same time can achieve the switching function of nine positions, so that the irradiation direction of the light-emitting part can be more accurate.

[0015] In an implementable embodiment, the sensor further includes a third sensor and a fourth sensor. The third sensor is provided with a third partition, and the fourth sensor is provided with a fourth partition. The third partition confines the monitoring range of the third sensor to a third area, and the fourth partition confines the monitoring range of the fourth sensor to a fourth area. The third sensor and the fourth sensor are arranged oppositely, and the first sensor and the second sensor are arranged oppositely. There are overlapping areas between the first area and the third and fourth areas, and there are overlapping areas between the second area and the third and fourth areas. The overlapping areas can be monitored by two sensors simultaneously. In this way, using four sensors can achieve the monitoring of eight areas. Plus one area that is not monitored, nine areas can be controlled, realizing the control of more directions with fewer sensors and reducing the manufacturing cost of the product.

[0016] In an implementable embodiment, the driving part includes a third electromagnet and a fourth electromagnet, and several permanent magnets corresponding to the third and fourth electromagnets. When the third and fourth electromagnets are energized forward or backward, electromagnetic forces can be generated to attract or repel the permanent magnets. The third and fourth electromagnets are fixed on the light-emitting part, or the permanent magnets are fixed on the light-emitting part and rotate synchronously with the light-emitting part. The first and second electromagnets drive the light-emitting part to rotate so that the irradiation range of the light-emitting part switches among the initial area, the first area, and the second area. The third and fourth electromagnets drive the light-emitting part to rotate so that the irradiation range of the light-emitting part switches among the initial area, the third area, and the fourth area. Using four sets of electromagnets to achieve the control of nine positions can reduce the manufacturing cost of the product and improve the utilization efficiency of electric energy on the premise of having good following illumination.

[0017] In an implementable embodiment, a Fresnel lens is provided outside the infrared sensor, and the main structure of the Fresnel lens is in the shape of a quarter sphere. The Fresnel lens has the effect of concentrating light, which can make the monitoring effect better. The quarter sphere meets the needs of the monitoring direction and can have better monitoring sensitivity in a certain direction.

[0018] In an implementable embodiment, the first partition is in a fan shape. The first partition is provided with a first positioning shaft so that the first partition can rotate around the first positioning shaft. The second, third, and fourth partitions adopt the same design. The first, second, third, and fourth partitions are circumferentially evenly distributed around the central axis of the light-emitting part. Such a design makes the monitoring range clearer and avoids misjudging the position of personnel.

[0019] In an implementable embodiment, the lighting fixture is provided with a suspension bracket. The suspension bracket includes a vertical rod, a first cross bar, and a second cross bar. The first cross bar and the second cross bar are cross-shaped and located in the horizontal direction. The vertical rod extends vertically upward from the intersection of the first cross bar and the second cross bar. The first electromagnet is correspondingly arranged with the first permanent magnet, the second electromagnet is correspondingly arranged with the second permanent magnet, the third electromagnet is correspondingly arranged with the third permanent magnet, and the fourth electromagnet is correspondingly arranged with the fourth permanent magnet. The first electromagnet, the second electromagnet, the third electromagnet, and the fourth electromagnet are fixed to the light-emitting part and rotate synchronously with the light-emitting part. The first permanent magnet and the second permanent magnet are installed on the second cross bar, and the third permanent magnet and the fourth permanent magnet are installed on the first cross bar. The first cross bar is provided with a first rotating shaft, and the first rotating shaft is provided with a rotating ring such that the rotating ring can rotate around the first rotating shaft. The rotating ring is provided with a second rotating shaft, and the first rotating shaft and the second rotating shaft are perpendicular to each other. The light-emitting part is arranged such that the second rotating shaft can rotate around the second rotating shaft. By using the suspension bracket and the rotating ring to form a structure with two rotating shafts, there is no need to set up a ball hinge structure, and rotation around two axes can be achieved.

[0020] In an implementable embodiment, the sensor is fixed to the light-emitting part and rotates with the light-emitting part. This can simplify the design of the control circuit. The driving part does not need to be continuously powered on to maintain the corresponding position, which is more power-saving.

[0021] In an implementable embodiment, the two ends of the second cross bar are provided with a first rotating ring and a second rotating ring. The first permanent magnet is fixed to the first rotating ring, and the second permanent magnet is fixed to the second rotating ring. The first permanent magnet and the second permanent magnet can rotate relative to the second cross bar. The two ends of the first cross bar are provided with a third rotating ring and a fourth rotating ring. The third permanent magnet is fixed to the third rotating ring, and the fourth permanent magnet is fixed to the fourth rotating ring. The third permanent magnet and the fourth permanent magnet can rotate relative to the first cross bar. The first cross bar is arranged in the horizontal direction, and the two ends of the second cross bar are inclined upward. The included angle between the rotation central axis of the first rotating ring and the second rotating ring and the horizontal plane is the same as the rotation angle of the light-emitting part around the first rotating shaft, such that after the light-emitting part rotates a certain angle around the first rotating shaft under the drive of the driving part, the rotation central axis of the third rotating ring is on the same straight line as the central axis of the second rotating shaft. With this design, no matter how the electromagnets and permanent magnets move, they can ensure stable attraction. For example, when the first electromagnet and the third electromagnet are attracted simultaneously, the stable attraction can be maintained through the rotation of the first permanent magnet and the third permanent magnet. When the third electromagnet is attracted after the first electromagnet is attracted, the stable attraction can also be achieved by rotating the first permanent magnet. After the first electromagnet or the third electromagnet is released, the permanent magnet in the attracted state can also rotate a certain angle to maintain close attraction.

[0022] It should be understood that the content described in this part is not intended to identify the key or important features of the embodiments of the present application, nor is it used to limit the scope of the present application. Other features of the present application will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] By referring to the detailed description below with reference to the accompanying drawings, the above and other objects, features, and advantages of the exemplary embodiments of the present application will become readily understood. In the drawings, several embodiments of the present application are shown by way of illustration and not limitation, wherein:

[0024] In the drawings, the same or corresponding reference numerals denote the same or corresponding parts.

[0025] Figure 1 A three-dimensional schematic diagram of the automatically following lighting fixture according to an embodiment of the present application is shown; Figure One ;

[0026] Figure 2 A three-dimensional schematic diagram of the automatically following lighting fixture according to an embodiment of the present application is shown; Figure Two ;

[0027] Figure 3 A schematic diagram of the internal structure of the monitoring part of the automatically following lighting fixture according to an embodiment of the present application is shown;

[0028] Figure 4 A schematic diagram of the front view of the mounting shell of the automatically following lighting fixture according to an embodiment of the present application is shown;

[0029] Figure 5 A schematic diagram of the internal mounting structure of the mounting shell of the automatically following lighting fixture according to an embodiment of the present application is shown;

[0030] Figure 6 A schematic diagram of the position of the mounting shell of the automatically following lighting fixture according to an embodiment of the present application after rotating around the first rotating shaft is shown;

[0031] Figure 7 A schematic diagram of the position of the mounting shell of the automatically following lighting fixture according to an embodiment of the present application after rotating around the first rotating shaft and then around the second rotating shaft is shown;

[0032] Figure 8 A schematic diagram of the top view of the mounting shell of the automatically following lighting fixture according to an embodiment of the present application is shown;

[0033] Figure 9 Shows Figure 8 A cross-sectional schematic diagram at the A-A position in

[0034] Figure 10 Shows Figure 9 A schematic diagram of the position after the mounting shell rotates around the second rotating shaft by a certain angle in

[0035] Figure 11 Shows Figure 8 A cross-sectional schematic diagram at the B-B position in

[0036] Figure 12 shows Figure 11 the schematic diagram of the position after the installation shell rotates a certain angle around the first rotating shaft in

[0037] Figure 13 the schematic diagram of the initial relative position between the installation shell and the rotating ring of the automatically following lighting fixture according to the embodiment of the present application;

[0038] Figure 14 the schematic diagram of the position after the installation shell of the automatically following lighting fixture according to the embodiment of the present application rotates a certain angle relative to the rotating ring;

[0039] Figure 15 the schematic diagram of the structure of the rotating ring of the automatically following lighting fixture according to the embodiment of the present application for installing the first rotating shaft;

[0040] Figure 16 the schematic diagram of the position where the second rotating shaft is arranged on the lower cover of the installation shell of the automatically following lighting fixture according to the embodiment of the present application;

[0041] Figure 17 the schematic diagram of the monitoring ranges of the first sensor and the second sensor when the monitoring part of the automatically following lighting fixture according to the embodiment of the present application is in the initial position;

[0042] Figure 18 the schematic diagram of the monitoring range of the second sensor when the monitoring part of the automatically following lighting fixture according to the embodiment of the present application rotates a certain angle;

[0043] Figure 19 the schematic diagram of the monitoring ranges of the fourth sensor and the second sensor when the monitoring part of the automatically following lighting fixture according to the embodiment of the present application rotates a certain angle around both the first rotating shaft and the second rotating shaft;

[0044] Figure 20 the schematic diagram of the control circuit of the automatically following lighting fixture according to the embodiment of the present application;

[0045] Figure 21 the schematic diagram of the installation positions of two electromagnets corresponding to one permanent magnet of the automatically following lighting fixture according to the embodiment of the present application.

[0046] Explanation of the reference numerals in the figure:

[0047] 1. Light-emitting part; 2. Monitoring part; 3. Driving part; 4. Initial area; 5. First area; 6. Second area; 7. Third area; 8. Fourth area; 9. Suspension bracket; 10. Light-emitting body; 11. First rotating shaft; 12. Mounting shell; 13. Second rotating shaft; 14. Heat sink; 15. Lamp cover; 16. Shaft hole; 17. Bearing seat; 18. Dust-proof cover; 19. First positioning shaft; 20. Sensor; 21. First sensor; 22. Second sensor; 23. Third sensor; 24. Fourth sensor; 25. First partition; 26. Second partition; 27. Third partition; 28. Fourth partition; 29. Fresnel lens; 30. Electromagnet; 31. First electromagnet; 32. Second electromagnet; 33. Third electromagnet; 34. Fourth electromagnet; 39. Buffer sheet; 40. Permanent magnet; 41. First permanent magnet; 42. Second permanent magnet; 43. Third permanent magnet; 44. Fourth permanent magnet; 45. First rotating ring; 46. Second rotating ring; 47. Third rotating ring; 48. Fourth rotating ring; 91. Vertical rod; 92. First horizontal rod; 93. Second horizontal rod; 94. Rotating ring; 121. Upper cover; 122. Lower seat; 123. Rubber cover. Detailed implementation manner

[0048] To make the objectives, features, and advantages of this application more obvious and understandable, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are only a part of the embodiments of this application, rather than all the embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative efforts shall fall within the scope of protection of this application.

[0049] As Figures 1 - 9 shown, an automatically following lighting fixture includes a light-emitting part 1, a monitoring part 2, and a driving part 3. The light-emitting part 1 is provided with a light-emitting body 10 capable of generating a certain light intensity in a certain direction. The monitoring part 2 can at least monitor the first area 5 or the initial area 4 by setting a plurality of sensors 20. The light-emitting part 1 is provided with a first rotating shaft 11 and can rotate around the first rotating shaft 11. The driving part 3 is provided with an electromagnet 30, and the driving of the light-emitting part 1 is realized by the attraction or repulsion of the electromagnet 30. The light-emitting part 1 rotates around the first rotating shaft 11 from irradiating the initial area 4 to irradiating the first area 5 or from irradiating the first area 5 to irradiating the initial area 4 under the drive of the driving part 3. The light-emitting part 1 can be reset by using gravity or a spring without external force.

[0050] The automatically following lighting fixture can be used indoors or outdoors as a street lamp, as long as relevant waterproof measures are designed. Due to the accuracy problem of the sensor 20, it is impossible for the lighting fixture to follow the movement of the human body very accurately, unless an artificial intelligence recognition software is used. The automatically following lighting fixture in this embodiment adjusts the lighting fixture to the corresponding area according to the general activity area of the human body. The number of areas is limited. For example, 3 areas or 9 areas are set, and the adjusted irradiation positions are also limited. The light-emitting body 10 can be an LED lamp bead, an LED filament or other lamp heads. To ensure a certain directionality, a lamp cover can be set to concentrate the light in a certain direction. The light-emitting part 1 can be driven unidirectionally by the driving part 3 and reset through a spring or other elastic structures, which can simplify the driving structure. The technical solution of this application does not require all the light to be concentrated in a certain area. For example, in a meeting room, two areas can be divided. If there are people in both areas, there is no rotation. If no people are found in one area, it is necessary to concentrate the stronger light in the other area, that is, rotate the light-emitting part 1. Since there are only two positions, using a traditional motor drive structure is complex, and a position monitoring structure also needs to be designed to identify the rotation position of the light-emitting part 1 and stop driving after reaching a certain position. It is very difficult for the sensor 20 to accurately identify the rotation position. However, through the electromagnet 30 structure, there are only the attracted position and the non-attracted position. The action is clearly defined, the positioning is accurate, the mechanism is simple, and the cost is low.

[0051] In one embodiment, the sensor 20 is one of a pyroelectric infrared sensor 20, an electromagnetic induction switch or a microwave induction switch. The sensor 20 is a pyroelectric infrared sensor 20 that can monitor infrared light. The pyroelectric infrared sensor 20, as the preferred embodiment of the present application, can fully automatically sense infrared light. When someone enters its sensing range, it inputs a high level. When the person leaves the sensing range, it automatically delays the high level and outputs a low level. A light-sensitive control can be set, and no sensing is performed during the day or when the light is strong. The pyroelectric infrared sensor 20 includes two triggering modes, namely, non-repeatable and repeatable. The non-repeatable trigger mode, that is, after the induction output is high, the output will automatically change from high to low as soon as the delay time ends; the repeatable trigger mode: that is, after the induction output is high, within the delay time period, if the human body is active within its sensing range, its output will remain high until the person leaves and the high level is changed to low. The sensing module will automatically postpone a delay time period after monitoring each activity of the human body. The repeatable trigger reduces the delay time as much as possible, and takes the time of the last activity as the starting point of the delay time. The repeatable trigger mode is suitable for designing when each sensor 20 corresponds to one area and one driving mode. The non-repeatable trigger needs to have an induction blocking time, which is generally set to 0.2 seconds by default, and can be adjusted according to the usage. The induction locking time can be set to 0.3 seconds for a larger rotation angle, and there is no need for repeated triggering. The induction module changes from a high level to a low level after each induction output, and a blocking time can be set immediately afterwards, and the sensor does not receive any induction signal during this time period. This function can realize the interval work of the induction output time and the blocking time, and can be applied to interval detection products; at the same time, this function can effectively suppress various interferences generated during the load switching process to ensure the completion of the action. The electromagnet 30 is generally provided with an iron core, and the permanent magnet can be attracted to the iron core without continuous power consumption, but reverse power is required to separate so that the electromagnet 30 and the permanent magnet repel each other.

[0052] like Figure 1 and 2As shown, in an implementable embodiment, the automatically following lighting fixture is mainly used indoors. The light emitter 10 is an LED lamp bead. The light-emitting part 1 further includes a mounting shell 12, a heat sink 14, and a lamp shade 15. The light emitter 10 is fixed below the heat sink 14, the lamp shade 15 is fixed below the light emitter 10, and the heat sink 14 is fixed on the mounting shell 12. The monitoring part 2 can be arranged below the mounting shell 12, and the driving part 3 can be arranged inside the mounting shell 12. The mounting shell 12 is directly or indirectly fixed on the suspension bracket 9. The mounting shell 12 includes an upper cover 121 and a lower seat 122. A rubber cover 123 is provided above the upper cover 121. The upper end is sleeved on the suspension bracket 9, and the lower end of the rubber cover 123 is fixed on the upper cover 121. The rubber cover 123 has elasticity, so that when the mounting shell 12 rotates relative to the suspension bracket 9, the rubber cover 123 always remains in close fit with the upper cover 121 to prevent dust from entering the mounting shell 12.

[0053] As Figure 3 and Figure 4 shown, in an implementable embodiment, the sensor 20 is arranged below the mounting shell 12. The sensor 20 includes a first sensor 21 and a second sensor 22. The monitoring area includes a first area 5 and a second area 6. The first area 5 and the second area 6 are located on both sides of the initial area 4. The first sensor 21 is provided with a first partition 25, and the second sensor 22 is provided with a second partition 26. The first partition 25 limits the monitoring range of the first sensor 21 to the first area 5, and the second partition 26 limits the monitoring range of the second sensor 22 to the second area 6. The first partition 25 and the second partition 26 are made of light-tight materials to control the light reception range.

[0054] As Figure 5 、 Figure 6 and Figure 7 shown, in an implementable embodiment, the light-emitting part 1 is provided with a second rotating shaft 13 so that the light-emitting part 1 can rotate around the second rotating shaft 13. The light-emitting part 1 rotates around the second rotating shaft 13 from irradiating the initial area 4 to irradiating the fourth area 8 or from irradiating the initial area 4 to irradiating the third area 7 under the drive of the driving part 3. As Figure 5 shown, the mounting shell 12 is in a horizontal position and does not rotate at all. As Figure 6 shown, the mounting shell 12 rotates by a certain angle around the first rotating shaft 11. As Figure 7 shown, after the mounting shell 12 rotates by a certain angle around the first rotating shaft 11, it then rotates by a certain angle around the second rotating shaft 13.

[0055] As Figure 8 and Figure 9As shown, in an implementable embodiment, the driving part 3 includes a first electromagnet 31 and a second electromagnet 32, and a plurality of permanent magnets 40 corresponding to the first electromagnet 31 and the second electromagnet 32. When the first electromagnet 31 and the second electromagnet 32 are energized forward or backward, electromagnetic force can be generated to attract or repel the permanent magnets 40. The first electromagnet 31 and the second electromagnet 32 are fixed to the light-emitting part 1, or the permanent magnets 40 are fixed to the light-emitting part 1 and rotate synchronously with the light-emitting part 1. According to needs, the position of the electromagnet 30 can be adjusted within a certain range. To ensure that there is no violent collision when the electromagnet 30 attracts the permanent magnet 40, an elastic rubber buffer sheet 39 is provided at the attracting end of the first electromagnet 31 and the second electromagnet 32 or the attracting end of the permanent magnet 40. The buffer sheet 39 can also be made of other elastic materials.

[0056] As Figure 3 shown, in an implementable embodiment, the sensor 20 further includes a third sensor 23 and a fourth sensor 24. The third sensor 23 is provided with a third partition 27, and the fourth sensor 24 is provided with a fourth partition 28. The third partition 27 limits the monitoring range of the third sensor 23 to the third area 7, and the fourth partition 28 limits the monitoring range of the fourth sensor 24 to the fourth area 8. The third sensor 23 and the fourth sensor 24 are arranged oppositely, and the first sensor 21 and the second sensor 22 are arranged oppositely. There are overlapping areas between the first area 5 and the third area 7 and the fourth area 8, and there are overlapping areas between the second area 6 and the third area 7 and the fourth area 8. The overlapping areas can be monitored by the two sensors 20 simultaneously.

[0057] As Figure 10 and Figure 11 shown, in an implementable embodiment, the driving part 3 includes a third electromagnet 33 and a fourth electromagnet 34, and a plurality of permanent magnets 40 corresponding to the third electromagnet 33 and the fourth electromagnet 34. When the third electromagnet 33 and the fourth electromagnet 34 are energized forward or backward, electromagnetic force can be generated to attract or repel the permanent magnets 40. The third electromagnet 33 and the fourth electromagnet 34 are fixed to the light-emitting part 1, or the permanent magnets 40 are fixed to the light-emitting part 1 and rotate synchronously with the light-emitting part 1 around the second rotating shaft 13 or the first rotating shaft 11. The first electromagnet 31 and the second electromagnet 32 drive the light-emitting part 1 to rotate so that the irradiation range of the light-emitting part 1 switches between the initial area 4, the first area 5 and the second area 6. The third electromagnet 33 and the fourth electromagnet 34 drive the light-emitting part 1 to rotate so that the irradiation range of the light-emitting part 1 switches between the initial area 4, the third area 7 and the fourth area 8.

[0058] As Figure 5 shown, when the first electromagnet 31, the second electromagnet 32, the third electromagnet 33 and the fourth electromagnet 34 do not attract the permanent magnets 40, the mounting shell 12 is in a horizontal position. As Figure 6As shown, the first electromagnet 31 is in the attracted position, the second electromagnet 32, the third electromagnet 33, and the fourth electromagnet 34 do not attract the permanent magnet 40, and the mounting case 12 rotates by a certain angle around the first rotating shaft 11. As Figure 7 shown, both the first electromagnet 31 and the third electromagnet 33 are in the attracted position, the second electromagnet 32 and the fourth electromagnet 34 do not attract the permanent magnet 40, and after the mounting case 12 rotates by a certain angle around the first rotating shaft 11, it rotates by a certain angle around the second rotating shaft 13. The positions of the electromagnet 30 and the permanent magnet 40 can be interchanged, which belongs to a conventional means.

[0059] As Figure 3 and Figure 4 shown, in an implementable embodiment, a Fresnel lens 29 is provided outside the infrared sensor 20, and the main structure of the Fresnel lens 29 is in the shape of a quarter spherical surface. A single infrared sensor 20 monitors a range with an included angle less than a quarter spherical surface, and a smaller Fresnel lens 29 can also be set as needed.

[0060] As Figure 3 and Figure 4 shown, in an implementable embodiment, the first partition 25 is in a fan shape, and the first partition 25 is provided with a first positioning shaft 19 such that the first partition 25 can rotate around the first positioning shaft 19. The second partition 26, the third partition 27, and the fourth partition 28 adopt the same design, and the first partition 25, the second partition 26, the third partition 27, and the fourth partition 28 are circumferentially evenly distributed around the central axis of the light emitting part 1.

[0061] As Figures 7 - 16As shown, in an implementable embodiment, the lighting fixture is provided with a suspension bracket 9. The suspension bracket 9 includes a vertical rod 91, a first cross bar 92, and a second cross bar 93. The first cross bar 92 and the second cross bar 93 are cross-shaped and located in the horizontal direction. The first cross bar 92 can extend in the left-right direction or in the front-back direction, which does not affect the use. In the embodiment, the first cross bar 92 extends in the left-right direction, and the second vertical rod 91 extends in the front-back direction. The vertical rod 91 extends vertically upward from the intersection point of the first cross bar 92 and the second cross bar 93. The vertical rod 91 is arranged in the vertical direction. The first electromagnet 31 is correspondingly arranged with the first permanent magnet 41, the second electromagnet 32 is correspondingly arranged with the second permanent magnet 42, the third electromagnet 33 is correspondingly arranged with the third permanent magnet 43, and the fourth electromagnet 34 is correspondingly arranged with the fourth permanent magnet 44. The first electromagnet 31, the second electromagnet 32, the third electromagnet 33, and the fourth electromagnet 34 are fixed to the light-emitting part 1 and rotate synchronously with the light-emitting part 1 around the second rotating shaft 13 or the first rotating shaft 11. The first permanent magnet 41 and the second permanent magnet 42 are installed on the second cross bar 93, and the third permanent magnet 43 and the fourth permanent magnet 44 are installed on the first cross bar 92. The first cross bar 92 is provided with a first rotating shaft 11, and the first rotating shaft 11 is provided with a rotating ring 94 such that the rotating ring 94 can rotate around the first rotating shaft 11. The rotating ring 94 is provided with a second rotating shaft 13, and the first rotating shaft 11 and the second rotating shaft 13 are perpendicular to each other. The light-emitting part 1 is arranged such that it can rotate around the second rotating shaft 13 with the second rotating shaft 13 as the center.

[0062] In an implementable embodiment, both ends of the second cross bar 93 are provided with a first rotating ring 45 and a second rotating ring 46. The first permanent magnet 41 is fixed to the first rotating ring 45, and the second permanent magnet 42 is fixed to the second rotating ring 46. The first permanent magnet 41 and the second permanent magnet 42 can rotate relative to the second cross bar 93. Both ends of the first cross bar 92 are provided with a third rotating ring 47 and a fourth rotating ring 48. The third permanent magnet 43 is fixed to the third rotating ring 47, and the fourth permanent magnet 44 is fixed to the fourth rotating ring 48. The third permanent magnet 43 and the fourth permanent magnet 44 can rotate relative to the first cross bar 92. The first cross bar 92 is arranged in the horizontal direction, and both ends of the second cross bar 93 are inclined upward. The included angle between the rotation center axis of the first rotating ring 45 and the second rotating ring 46 and the horizontal plane is the same as the rotation angle of the light-emitting part 1 around the first rotating shaft 11, such that after the light-emitting part 1 rotates a certain angle around the first rotating shaft 11 under the drive of the driving part 3, the rotation center axis of the third rotating ring 47 is on the same straight line as the central axis of the second rotating shaft 13.

[0063] As Figure 9 shown, neither the first electromagnet 31 nor the second electromagnet 32 is in the attracted state, the installation shell 12 is in the horizontal position, and the first rotating shaft 11 and the second rotating shaft 13 are in the horizontal position. As Figure 10As shown, the second electromagnet 32 and the second permanent magnet 42 are in an attracted state, and the mounting shell 12 rotates by a certain angle around the first rotating shaft 11. It can be seen that the second rotating shaft 13 is inclined by a certain angle. At this time, the second rotating ring 46 is coaxial with the second rotating shaft 13 and can rotate freely. Whether the material third electromagnet 33 and the fourth electromagnet 34 are attracted or not does not affect the attracted state of the second electromagnet 32. As Figure 11 shown, neither the third electromagnet 33 nor the fourth electromagnet 34 is in an attracted state, the mounting shell 12 is in a horizontal position, and the first rotating shaft 11 and the second rotating shaft 13 are in a horizontal position. As Figure 12 shown, the fourth electromagnet 34 and the fourth permanent magnet 44 are in an attracted state, and the mounting shell 12 rotates by a certain angle around the second rotating shaft 13. Since the fourth rotating ring 48 is provided, the fourth permanent magnet 44 can rotate. At this time, the rotation of the mounting around the first rotating shaft 11 does not affect the attracted state of the fourth electromagnet 34 and the fourth permanent magnet 44. As Figure 13 shown, a rotating ring 94 is arranged inside the mounting shell 12, as Figure 14 shown, the rotating ring 94 rotates by a certain angle relative to the mounting shell 12 with the second rotating shaft 13 as the center, as Figure 15 shown, the rotating ring 94 is circular, provided with a shaft hole 16 for the second rotating shaft 13, and can mount the first rotating shaft 11, as Figure 16 shown, the second rotating shaft 13 is arranged on the mounting shell 12 and can be integrally injection-molded or installed together after being separately processed.

[0064] As Figure 3 and Figure 4 shown, in an implementable embodiment, the sensor 20 is fixed to the light-emitting part 1 and rotates with the light-emitting part 1. A light-transmitting dust-proof cover 18 is arranged outside the sensor 20. The mounting shell 12 is provided with a plurality of bearing seats 17 to fix the first positioning shaft 19 and limit the rotation of the first partition plate 25. The second partition plate 26, the third partition plate 27 and the fourth partition plate 28 adopt the same design, so that the second partition plate 26, the third partition plate 27 and the fourth partition plate 28 can all rotate relative to the mounting shell 12.

[0065] As Figure 17 、 Figure 18 and Figure 19 shown, the sensor 20 will have different monitoring ranges after rotating with the mounting shell 12. As Figure 17 shown, in the initial position, the first sensor 21 monitors the first area 5, the second sensor 22 monitors the second area 6, the third sensor 23 monitors the third area 7, the fourth sensor 24 monitors the fourth area 8, and sensors may not be arranged in the initial area 4. As Figure 18As shown, after the first electromagnet 31 is attracted and the mounting shell 12 rotates by a certain angle, the monitoring range of the first sensor 21 exceeds the room range, so it is regarded as having no monitoring range. Since the sensor 20 rotates with the mounting shell 12, the monitoring range of the second sensor 22 expands, and the middle area is also expanded to the monitoring range. The monitoring ranges of the fourth sensor 24 and the third sensor 23 remain unchanged, as Figure 19 shown, both the first electromagnet 31 and the third electromagnet 33 are in the attracted position. The mounting shell 12 rotates by a certain angle along both the first rotating shaft 11 and the second rotating shaft 13, causing the monitoring ranges of the fourth sensor 24 and the third sensor 23 to change. The monitoring range of the third sensor 23 exceeds the room range, and the monitoring range of the fourth sensor 24 expands to the middle area.

[0066] As Figure 20As shown, the first electromagnet 31 is provided with a first coil L1, the second electromagnet 32 is provided with a second coil L2, the third electromagnet 33 is provided with a third coil L3, and the fourth electromagnet 34 is provided with a fourth coil L4. The first sensor 21 correspondingly triggers the first switch S1, the second sensor 22 correspondingly triggers the second switch S2, the third sensor 23 correspondingly triggers the third switch S3, and the fourth sensor 24 correspondingly triggers the fourth switch S4. The first switch S1 controls the first relay switch KM1, the second switch S2 controls the second relay switch KM2, the third switch S3 controls the third relay switch KM3, and the fourth switch S4 controls the fourth relay switch KM4. When the first relay switch KM1 is turned on, the first coil L1 and the second coil L2 are connected in the forward direction. The first electromagnet 31 generates an attractive force on the first permanent magnet 41, then the second electromagnet 32 generates a repulsive force, or the first electromagnet 31 generates a repulsive force on the first permanent magnet 41, then the second electromagnet 32 generates an attractive force. When the second relay switch KM2 is turned on, the first coil L1 and the second coil L2 are connected in the reverse direction. The first electromagnet 31 generates a repulsive force on the first permanent magnet 41, then the second electromagnet 32 generates an attractive force, or the first electromagnet 31 generates an attractive force on the first permanent magnet 41, then the second electromagnet 32 generates a repulsive force. When the third relay switch KM3 is turned on, the third coil L3 and the fourth coil L4 are connected in the forward direction. The third electromagnet 33 generates an attractive force on the third permanent magnet 43, then the fourth electromagnet 34 generates a repulsive force, or the third electromagnet 33 generates a repulsive force on the third permanent magnet 43, then the fourth electromagnet 34 generates an attractive force. When the fourth relay switch KM4 is turned on, the third coil L3 and the fourth coil L4 are connected in the reverse direction. The third electromagnet 33 generates a repulsive force on the third permanent magnet 43, then the fourth electromagnet 34 generates an attractive force, or the third electromagnet 33 generates an attractive force on the third permanent magnet 43, then the fourth electromagnet 34 generates a repulsive force. This control scheme is designed based on the premise that when the electromagnet 30 is powered off, the permanent magnet 40 can still generate sufficient attractive force on the iron core of the electromagnet 30. If there are active personnel in multiple areas, the electromagnet 30 will be powered on frequently. To avoid frequent control of the rotation of the lighting fixture, the entire control circuit is powered on once after a certain period of time, for example, once a minute, and the power-on time is about one second each time to complete the monitoring and the operation of the electromagnet 30. The specific time can be adjusted according to needs.

[0067] In an implementable embodiment, the sensor 20 can be used to control the relay, and then the relay is used to control the relay. This can also avoid frequent back-and-forth jumping, but a sensor 20 needs to be set at each detection position.

[0068] Such as Figure 21As shown, in one implementable embodiment, the first electromagnet 31 and the second electromagnet 32 are on the same straight line as the first permanent magnet 41. The first electromagnet 31 and the second electromagnet 32 can be arranged in the up-down direction of the first permanent magnet 41, or can be arranged in the front-back or left-right direction of the first permanent magnet 41. The first electromagnet 31, the second electromagnet 32 and the first permanent magnet 41 can be arranged inside the mounting shell 12, or can be arranged outside the mounting shell 12. The settings of these positions do not affect the driving effect of the electromagnet 30. When the first electromagnet 31 is energized in the forward direction, the first electromagnet 31 adsorbs to the first permanent magnet 41. When the first electromagnet 31 is energized in the reverse direction, the first electromagnet 31 repels the first permanent magnet 41.

[0069] It should be understood that the various forms of the processes shown above can be used, steps can be reordered, added or deleted. For example, the steps described in this application can be executed in parallel, sequentially or in a different order, as long as the desired results of the technical solution of this application can be achieved, and no limitations are imposed herein.

[0070] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of this application, "a plurality" means two or more, unless otherwise specifically defined.

[0071] The above is only the specific implementation manner of this application, but the protection scope of this application is not limited thereto. Any person skilled in the art within the technical scope disclosed in this application can easily think of changes or substitutions, which should all be covered within the protection scope of this application. Therefore, the protection scope of this application should be subject to the protection scope of the claims.

Claims

1. An automatically following lighting fixture, comprising a light-emitting part (1), a monitoring part (2) and a driving part (3). The light-emitting part (1) is provided with a light-emitting body (10) capable of generating a certain light intensity in a certain direction. The monitoring part (2) can at least monitor a first area (5) or an initial area (4) by arranging a plurality of sensors (20). The light-emitting part (1) is provided with a first rotating shaft (11) capable of rotating around the first rotating shaft (11). It is characterized in that: The driving part (3) is provided with an electromagnet (30), and the driving of the light-emitting part (1) is realized by the attraction or repulsion of the electromagnet (30). The light-emitting part (1) rotates around the first rotating shaft (11) under the driving of the driving part (3) from irradiating the initial area (4) to irradiating the first area (5) or from irradiating the first area (5) to irradiating the initial area (4). The sensor (20) includes a first sensor (21), a second sensor (22), a third sensor (23) and a fourth sensor (24). The monitoring range of the first sensor (21) is limited to the first area (5), the monitoring range of the second sensor (22) is limited to the second area (6), the monitoring range of the third sensor (23) is limited to the third area (7), and the monitoring range of the fourth sensor (24) is limited to the fourth area (8). There are overlapping areas between the first area (5) and the third area (7) and the fourth area (8), and there are overlapping areas between the second area (6) and the third area (7) and the fourth area (8). The overlapping areas can be monitored by two of the sensors (20) simultaneously. The light-emitting part (1) is provided with a second rotating shaft (13) so that the light-emitting part (1) can rotate around the second rotating shaft (13). The light-emitting part (1) rotates around the second rotating shaft (13) under the driving of the driving part (3) from irradiating the initial area (4) to irradiating the fourth area (8) or from irradiating the initial area (4) to irradiating the third area (7). The driving part (3) includes a first electromagnet (31), a second electromagnet (32), a third electromagnet (33) and a fourth electromagnet (34). The first electromagnet (31) and the second electromagnet (32) drive the light-emitting part (1) to rotate so that the irradiation range of the light-emitting part (1) switches between the initial area (4), the first area (5) and the second area (6). The third electromagnet (33) and the fourth electromagnet (34) drive the light-emitting part (1) to rotate so that the irradiation range of the light-emitting part (1) switches between the initial area (4), the third area (7) and the fourth area (8). The lighting fixture is provided with a suspension bracket (9). The suspension bracket (9) includes a first cross bar (92) and a second cross bar (93). Third rotating rings (47) and fourth rotating rings (48) are provided at both ends of the first cross bar (92). First rotating rings (45) and second rotating rings (46) are provided at both ends of the second cross bar (93). The first cross bar (92) mounts the first rotating shaft (11). A rotating ring (94) is provided on the first rotating shaft (11) such that the rotating ring (94) can rotate about the first rotating shaft (11). The rotating ring (94) mounts the second rotating shaft (13). The first rotating shaft (11) and the second rotating shaft (13) are perpendicular to each other. The light emitting part (1) is arranged such that it can rotate about the second rotating shaft (13). The first cross bar (92) is arranged in the horizontal direction. Both ends of the second cross bar (93) are inclined upward. The included angle between the rotation central axis of the first rotating ring (45) and the second rotating ring (46) and the horizontal plane is the same as the rotation angle of the light emitting part (1) about the first rotating shaft (11), such that after the light emitting part (1) rotates a certain angle about the first rotating shaft (11) under the drive of the drive part (3), the rotation central axis of the third rotating ring (47) is on the same straight line as the central axis of the second rotating shaft (13).

2. The automatically following lighting fixture according to claim 1, characterized in that: The monitoring area of the monitoring part (2) includes a first area (5) and a second area (6). The first area (5) and the second area (6) are located on both sides of the initial area (4). The first sensor (21) is provided with a first partition (25). The second sensor (22) is provided with a second partition (26). The first partition (25) limits the monitoring range of the first sensor (21) to the first area (5). The second partition (26) limits the monitoring range of the second sensor (22) to the second area (6).

3. The automatically following lighting fixture according to claim 2, characterized in that: A number of permanent magnets (40) are correspondingly arranged with the first electromagnet (31) and the second electromagnet (32). When the first electromagnet (31) and the second electromagnet (32) are energized forward or backward, electromagnetic force can be generated to adsorb or repel the permanent magnets (40). The first electromagnet (31) and the second electromagnet (32) are fixed on the light emitting part (1), or the permanent magnets (40) are fixed on the light emitting part (1) and rotate synchronously with the light emitting part (1).

4. The automatically following lighting fixture according to claim 3, characterized in that: The third sensor (23) is provided with a third partition (27). The fourth sensor (24) is provided with a fourth partition (28). The third partition (27) limits the monitoring range of the third sensor (23) to a third area (7). The fourth partition (28) limits the monitoring range of the fourth sensor (24) to a fourth area (8). The third sensor (23) and the fourth sensor (24) are arranged oppositely. The first sensor (21) and the second sensor (22) are arranged oppositely.

5. The automatically following lighting fixture according to claim 4, characterized in that: A plurality of the permanent magnets (40) are correspondingly arranged for the third electromagnet (33) and the fourth electromagnet (34). When the third electromagnet (33) and the fourth electromagnet (34) are energized in the forward or reverse direction, electromagnetic force can be generated to adsorb or repel the permanent magnets (40). The third electromagnet (33) and the fourth electromagnet (34) are fixed on the light-emitting part (1), or the permanent magnets (40) are fixed on the light-emitting part (1) and rotate synchronously with the light-emitting part (1).

6. The automatically following lighting fixture according to claim 5, wherein: The first partition plate (25) is fan-shaped. The first partition plate (25) is provided with a first positioning shaft (19) so that the first partition plate (25) can rotate around the first positioning shaft (19). The second partition plate (26), the third partition plate (27) and the fourth partition plate (28) adopt the same design. The first partition plate (25), the second partition plate (26), the third partition plate (27) and the fourth partition plate (28) are circumferentially and uniformly distributed around the central axis of the light-emitting part (1).

7. The automatically following lighting fixture according to claim 6, characterized in that: The suspension bracket (9) includes a vertical rod (91). The first cross bar (92) and the second cross bar (93) are cross-shaped and located in the horizontal direction. The vertical rod (91) extends vertically upward from the intersection of the first cross bar (92) and the second cross bar (93). The first electromagnet (31) is correspondingly arranged with the first permanent magnet (41), the second electromagnet (32) is correspondingly arranged with the second permanent magnet (42), the third electromagnet (33) is correspondingly arranged with the third permanent magnet (43), and the fourth electromagnet (34) is correspondingly arranged with the fourth permanent magnet (44). The first electromagnet (31), the second electromagnet (32), the third electromagnet (33) and the fourth electromagnet (34) are fixed on the light-emitting part (1) and rotate synchronously with the light-emitting part (1). The first permanent magnet (41) and the second permanent magnet (42) are installed on the second cross bar (93), and the third permanent magnet (43) and the fourth permanent magnet (44) are installed on the first cross bar (92).

8. The automatically following lighting fixture according to claim 7, characterized in that: The first permanent magnet (41) is fixed on the first rotating ring (45), and the second permanent magnet (42) is fixed on the second rotating ring (46). The first permanent magnet (41) and the second permanent magnet (42) can rotate relative to the second cross bar (93). The third permanent magnet (43) is fixed on the third rotating ring (47), and the fourth permanent magnet (44) is fixed on the fourth rotating ring (48). The third permanent magnet (43) and the fourth permanent magnet (44) can rotate relative to the first cross bar (92).

9. The automatically following lighting fixture according to any one of claims 1-8, characterized in that: The sensor (20) is an infrared sensor and is externally provided with a Fresnel lens (29). The main structure of the Fresnel lens (29) is in the shape of a quarter sphere. The sensor (20) is fixed on the light-emitting part (1) and rotates with the light-emitting part (1).

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