Lamp rotating mechanism and lamp

Abstract

The present invention discloses a lamp rotating mechanism and a lamp, wherein the lamp rotating mechanism comprises a base module, a rotating arm module and a zero position detection module, the base module comprises a base and a rotating part arranged on the base, the rotating arm module comprises a rotating arm, a main shaft and a driving mechanism, one end of the main shaft is connected to the rotating arm, and the other end of the main shaft is rotatably connected to the rotating part, the driving mechanism drives the rotating arm to rotate, and the driving mechanism is connected to the base through a transmission structure, the zero position detection module comprises a first zero position detection mechanism and a second zero position detection mechanism, when the first zero position detection mechanism and the second zero position detection mechanism are both triggered, the lamp rotating mechanism is at the zero position, and the first zero position detection mechanism and the second zero position detection mechanism are set to lock the zero position detection.

Description

Technical Field

[0001] The present invention relates to the technical field of lamps, and in particular to a lamp rotating mechanism and a lamp. Background Art

[0002] At present, the X-axis rotation of computer moving head lamps belongs to a rotary mechanism. Every time the lamp is reset, it is necessary to find the preset "zero" position of the lamp, that is, the defined starting position of the X-axis rotation movement of the lamp. Generally, when the motion mechanism determines the "zero" position, a group of sensors are set on the relatively stationary parts and the moving parts in the motion mechanism, and the "zero" position is determined by the sensor signal caused by the relative position change of the two parts.

[0003] Generally, the X-axis travel of computer moving head lamps is greater than 540°, but less than 630°. In fact, the effective working travel of 540° can meet the use requirements. Taking the 540° travel as an example, the X-axis of the lamp will have a trajectory overlap if it is greater than 180° in the entire unidirectional movement. If only one set of sensors is set, in the same unidirectional rotation cycle, this set of sensors will definitely have two position overlaps, that is, there will be two signal changes with the same characteristics. In this way, it is impossible to rely on a single set of sensors to determine the "zero" position.

[0004] At present, computer moving head lamps generally use a set of sensors at the "zero" position to detect, and design limit structures at the "zero" position and the end position. When resetting, the X-axis rotates in the opposite direction to the "zero" point, but it cannot continue to move forward due to the obstruction of the limit structure, resulting in continuous mechanical impact. The control system uses the sensor detection signal here, plus the signal of motor stall to determine the "zero point", and there will be a same sensor signal at the 360° stroke, but there is no limit structure blocking here and no motor stall signal, so the control system will not determine it as the "zero" point.

[0005] At present, the disadvantages of this solution are as follows: 1. Every time the lamp is reset, it will emit a noise of hitting the limit column. After a long period of use, the limit column at the starting point will be damaged or deformed by impact, resulting in the drift of the "zero" position; 2. If the slewing mechanism happens to be blocked at the 360° position due to other reasons, the system will make a misjudgment; 3. In order to avoid the second low-probability event, some lamps often reset in the reverse direction when resetting, and preliminarily determine the "zero" position through the sensor + motor blocking signal, and then control the motor to rotate forward more than 540°. After the motor hits the limit mechanism at the end point and receives a blocking signal, it reverses again to the "zero" position, and then determines that the "zero" position is valid. If the motor is blocked before reaching 540° during forward rotation, it is determined that the slewing mechanism is faulty. Therefore, the reset time is very long. Summary of the invention

[0006] The purpose of the present invention is to solve at least one of the technical problems existing in the prior art and to provide a lamp rotating mechanism.

[0007] According to a first aspect of an embodiment of the present invention, there is provided a lamp rotation mechanism, comprising a base module, a rotating arm module and a zero position detection module, the base module comprising a base and a rotating member arranged on the base, the rotating arm module comprising a rotating arm, a main shaft and a driving mechanism, one end of the main shaft is connected to the rotating arm, and the other end of the main shaft is rotatably connected to the rotating member, the driving mechanism drives the rotating arm to rotate, and the driving mechanism is connected to the base through a transmission structure, the zero position detection module comprises a first zero position detection mechanism and a second zero position detection mechanism, when both the first zero position detection mechanism and the second zero position detection mechanism are triggered, the lamp rotation mechanism is at the zero position.

[0008] Beneficial effects: This lamp rotating mechanism includes a base module, a rotating arm module and a zero position detection module. The base module includes a base and a rotating part arranged on the base. The rotating arm module includes a rotating arm, a main shaft and a driving mechanism. One end of the main shaft is connected to the rotating arm, and the other end of the main shaft is rotatably connected to the rotating part. The driving mechanism drives the rotating arm to rotate, and the driving mechanism is connected to the base through a transmission structure. The zero position detection module includes a first zero position detection mechanism and a second zero position detection mechanism. When the first zero position detection mechanism and the second zero position detection mechanism are both triggered, the lamp rotating mechanism is at the zero position. The first zero position detection mechanism and the second zero position detection mechanism are set to lock the zero position detection.

[0009] According to the lamp rotating mechanism described in the embodiment of the first aspect of the present invention, the lamp rotating mechanism also includes a limit module, the limit module includes a positioning block, a first limit column and a second limit column, the first limit column is arranged on the transmission structure, the second limit column is arranged on the bottom surface of the rotating arm, the positioning block is sleeved on the main shaft, and the positioning block and the first limit column and the second limit column limit the starting point and end point of the rotating arm.

[0010] According to the lamp rotating mechanism described in the embodiment of the first aspect of the present invention, the positioning block includes a positioning plate, a first limit block and a second limit block, the first limit block is arranged on the outer ring side of the positioning plate, and the second limit block is arranged on the outer ring side of the first limit block.

[0011] According to the lamp rotating mechanism described in the embodiment of the first aspect of the present invention, the arc length of the first limit block is greater than the arc length of the second limit block, inner limit ribs are formed on both sides of the first limit block, and outer limit ribs are formed on both sides of the second limit block.

[0012] According to the lamp rotating mechanism described in the embodiment of the first aspect of the present invention, the transmission structure is a synchronous pulley, the transmission structure includes a driving wheel, a driven wheel and a synchronous belt connecting the driving wheel and the driven wheel, and the driven wheel is arranged on the base.

[0013] According to the lamp rotating mechanism described in the embodiment of the first aspect of the present invention, the first zero-position detection mechanism includes a first sensing member and a first sensor assembly, the first sensing member is arranged on the peripheral side of the base, the first sensor assembly includes a first mounting plate and a first sensor, the first sensor is fixed to the bottom surface of the rotating arm through the first mounting plate, and when the first sensing member and the first sensor interfere with each other, the first sensor triggers an open signal state.

[0014] According to the lamp rotating mechanism described in the embodiment of the first aspect of the present invention, the second zero-position detection mechanism includes a second sensing member and a second sensor assembly, the second sensing member is arranged on the positioning block, the second sensor assembly includes a second mounting plate and a second sensor, the second sensor is fixed to the bottom surface of the rotating arm through the second mounting plate, and when the second sensing member interferes with the second sensor, the second sensor triggers an open signal state.

[0015] According to the lamp rotating mechanism described in the embodiment of the first aspect of the present invention, the first induction member and the second induction member are magnets.

[0016] According to the lamp rotating mechanism described in the embodiment of the first aspect of the present invention, the rotating part is a bearing.

[0017] According to a second aspect of the present invention, there is provided a lamp, comprising: a lamp arm and the lamp rotating mechanism of the first aspect, wherein the lamp arm and the lamp rotating mechanism are fixedly connected. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention is further described below in conjunction with the accompanying drawings and embodiments;

[0019] Figure 1 This is a schematic diagram of a lamp rotation mechanism according to an embodiment of the present invention;

[0020] Figure 2 This is a schematic diagram of a base module according to an embodiment of the present invention;

[0021] Figure 3 This is a schematic diagram of a rotating arm module according to an embodiment of the present invention;

[0022] Figure 4 This is a schematic diagram of a positioning block according to an embodiment of the present invention;

[0023] Figure 5 This is a schematic diagram of the position of the lamp rotating mechanism before resetting according to an embodiment of the present invention;

[0024] Figure 6 This is a schematic diagram of the zero position of the rotating mechanism of the lamp according to the embodiment of the present invention after being reset;

[0025] Figure 7 This is a schematic diagram of the rotating mechanism of the lamp according to the embodiment of the present invention rotating forward to 0°;

[0026] Figure 8 This is a schematic diagram of the rotating mechanism of the lamp according to the embodiment of the present invention rotating forward to 319°;

[0027] Fig. 9 This is a schematic diagram of the rotating mechanism of the lamp according to the embodiment of the present invention rotating forward to 358°;

[0028] Fig.10 Schematic diagram of the working end point of the lamp rotating mechanism rotating forward to 540° according to the embodiment of the present invention

[0029] Fig.11 This is a schematic diagram of the physical limit end point of the lamp rotating mechanism rotating forward to 542° according to an embodiment of the present invention;

[0030] Fig.12 This is a schematic diagram of the lamp rotating mechanism according to an embodiment of the present invention being reversed to 358°;

[0031] Fig.13 This is a schematic diagram of the lamp rotating mechanism according to an embodiment of the present invention being reversed to 219°;

[0032] Fig.14 Schematic diagram of the lamp rotating mechanism in the embodiment of the present invention reversing back to 0°

[0033] Fig.15 This is a schematic diagram of the free movement range of the positioning block when the rotating mechanism of the lamp according to the embodiment of the present invention is at the 358° position;

[0034] Fig.16 It is a schematic diagram of the starting point of the physical limit of the rotating mechanism of the lamp according to the embodiment of the present invention;

[0035] Fig.17 It is a schematic diagram of the end point of the physical limit of the rotating mechanism of the lamp according to the embodiment of the present invention;

[0036] Fig.18 Schematic diagram of a lamp according to an embodiment of the present invention. DETAILED DESCRIPTION

[0037] This section will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present invention, but it cannot be understood as a limitation on the scope of protection of the present invention.

[0038] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0039] In the description of the present invention, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood as not including the number itself, and "above", "below", "within" etc. are understood as including the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0040] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0041] Reference Figures 1 to 4 A lamp rotation mechanism includes a base module 100, a rotating arm module 200 and a zero position detection module. The base module 100 includes a base 110 and a rotating member 120 arranged on the base 110. The rotating member 120 is a bearing. The main shaft 220 is inserted into the bearing and fixed at the lower end with a round nut. The rotating arm module 200 includes a rotating arm 210, a main shaft 220 and a driving mechanism 230. One end of the main shaft 220 is connected to the rotating arm 210, and the other end of the main shaft 220 is rotatably connected to the bearing. The driving mechanism 230 drives the rotating arm 210 to rotate, and the driving mechanism 230 is connected to the base 110 through a transmission structure. The transmission structure is a synchronous pulley. The transmission structure includes a driving wheel, a driven wheel 510 and a synchronous belt 520 connecting the driving wheel and the driven wheel 510. The driven wheel 510 is arranged on the base 110, and the transmission belt connects the driving mechanism 230 and the driven wheel 510. During operation, the base module 100 is fixed. When the driving mechanism 230 is controlled to rotate clockwise or counterclockwise, the rotating arm 210 is respectively rotated forward (counterclockwise) or reverse (clockwise) around the base module 100 through the transmission belt. The zero position detection module includes a first zero position detection mechanism and a second zero position detection mechanism. When the first zero position detection mechanism and the second zero position detection mechanism are both triggered, the lamp rotating mechanism is at the zero position, thereby locking the zero position detection.

[0042] Reference Figure 1 , Figure 4The lamp rotation mechanism also includes a limit module, which includes a positioning block 410, a first limit column 420 and a second limit column 430. The first limit column 420 is arranged on the transmission structure, and the second limit column 430 is arranged on the bottom surface of the rotating arm 210. The positioning block 410 is loosely sleeved on the main shaft 220. The positioning block 410 and the first limit column 420 and the second limit column 430 limit the starting point and the end point of the rotating arm 210. The positioning block 410 includes a positioning plate 411, a first limit block 412 and a second limit block 413. The first limit block 412 is arranged on the outer ring side of the positioning plate 411, and the second limit block 413 is arranged on the outer ring side of the first limit block 412. The arc length of the first limit block 412 is greater than the arc length of the second limit block 413. The first limit block 412 is formed with inner limit ribs on both sides, and the second limit block 413 is formed with outer limit ribs on both sides. When the first limiting column 420 pushes the outer limiting rib of the second limiting block 413 , the positioning block 410 will rotate together with the rotating arm 210 .

[0043] Reference Figure 1 The first zero position detection mechanism includes a first induction member 310 and a first sensor assembly 320. The first induction member 310 is a magnet. The first induction member 310 is arranged on the peripheral side of the base 110, and the first sensor assembly 320 includes a first mounting plate and a first sensor. The first sensor is fixed to the bottom surface of the rotating arm 210 through the first mounting plate, and the first sensor is a Hall sensor. When the Hall sensor and its corresponding magnet are very close, the signal of the Hall sensor being triggered is on, and the signal when the magnet is far away is off.

[0044] The second zero position detection mechanism includes a second induction member 330 and a second sensor assembly 340. The second induction member 330 is a magnet. The second induction member 330 is arranged on the positioning block 410, and the second sensor assembly 340 includes a second mounting plate and a second sensor, and the second sensor is fixed to the bottom surface of the rotating arm 210 through the second mounting plate. The second sensor is a Hall sensor. When the second induction member 330 and the second sensor interfere, the second sensor triggers an open signal state.

[0045] This lamp rotation mechanism adds two zero position sensor detection points to the ordinary lamp positioning structure, and optimizes the sensor layout and detection logic to lock the zero position detection. The limit modules at the starting point and the end point are functionally changed to motion insurance structures.

[0046] The maximum rotation range is 544°, and the positioning detection is performed by the combination of Hall sensor and magnet. Figure 5When the system controls the driving mechanism 230 to rotate counterclockwise, the rotating arm 210 is driven to reverse around the base module 100, and the second limiting column 430 hits the outer limiting rib 1 on the positioning block 410, and pushes the positioning block 410 to rotate with the rotating arm 210. At this time, the second sensor approaches the second sensing element 330 and remains in position. The second sensor is triggered to turn on and maintains this state until the inner limiting rib 2 on the positioning block 410 hits the first limiting column 420. The first sensor is also triggered to turn on as it enters the close-range magnetic field of the first sensing element 310. Figure 6 At this time, the second sensor and the first sensor are both in the open signal state and are determined by the system as the zero point. At this time, the rotating arm 210 is also restricted by the physical structure composed of the positioning block 410, the first limiting column 420 and the second limiting column 430, and cannot continue to rotate clockwise.

[0047] To ensure the consistency of the whole batch of products, the zero position is only the reset origin, and the actual working stroke generally intercepts a section of the stroke between the zero position and the end point of the physical limit. In one embodiment, the maximum stroke of the lamp is 544°, the zero position is -2°, and the physical end point is 542°. In this way, even if the entire stroke is 544°±2° due to errors, the zero position of each lamp can be adjusted by the control system to ensure the known stroke of 0°-540°.

[0048] Rotate counterclockwise (forward) from zero position, such as Figure 7 The system controls the driving mechanism 230 to rotate clockwise, driving the rotating arm 210 to rotate forward around the base module 100, the second limit column 430 will be separated from the positioning block 410, and the first sensor and the second sensor will be separated from the close-range magnetic fields of the first sensing element 310 and the second sensing element 330 respectively, and their signal states will become off, and will be reported to the system and remain in the off state.

[0049] like Figure 8 and Fig. 9 As the rotating arm 210 continues to rotate forward to the 319° position, the second limit post 430 will hit the outer limit rib 2 on the positioning block 410 and push the positioning block 410 to rotate along with the rotating arm 210, as shown in the figure, until it rotates to near the 358° position, the first sensor enters the close-range magnetic field of the first sensing element 310, and its signal changes from off to on. When it continues to rotate forward, the first sensor is away from the first sensing element 310, and its signal continues to remain in the off state.

[0050] like Fig.10 and Fig.11As the rotating arm 210 continues to rotate forward to the 542° position, when the outer limit retaining edge on the positioning block 410 hits the first limit post 420 on the base module 100, the rotating arm 210 is also restricted by the physical structure formed by the positioning block 410, the first limit post 420 and the second limit post 430, and cannot continue to rotate counterclockwise.

[0051] like Fig.12 , rotate clockwise (reverse) from the 542° position: the control system controls the driving mechanism 230 to rotate counterclockwise, drives the rotating arm 210 to reverse around the base module 100, and the second limit column 430 will be separated from the positioning block 410 until it is reversed to near the 358° position. The first sensor enters the close-range magnetic field of the first sensing element 310, and its signal changes from off to on. The reversal continues, and the first sensor is separated from the first sensing element 310, and its signal remains in the off state again.

[0052] like Fig.13 As the rotating arm 210 continues to reverse to the 219° position, the second limiting column 430 hits the outer limiting rib 1 on the positioning block 410 and pushes the positioning block 410 to rotate with the rotating arm 210. At this time, the second sensor enters the close-range magnetic field of the second sensing element 330 to maintain this position, triggering an open signal and maintaining this state.

[0053] like Fig.14 Until the rotating arm 210 continues to reverse to the zero position, the first sensor enters the close-range magnetic field of the first sensing element 310 and is also triggered to generate an open signal. In addition, the rotating arm 210 is also restricted by the physical structure and cannot maintain clockwise rotation.

[0054] The positioning block 410 is loosely mounted on the main shaft 220. During the movement, when the second limit post 430 is separated from the positioning block 410, the positioning block 410 may also rotate synchronously or lag with the rotating arm 210 under the influence of friction and the like. From the above, it can be seen that, except for the zero position, only at the 358° position will the first sensor enter the close-range magnetic field of the first sensing element 310 again, thereby converting into an open signal. Fig.15 , when the first sensor is at the 358° position and an open signal appears, the second sensor will not enter the close-range magnetic field of the second sensing element 330 within the range of motion allowed by the positioning block 410, that is, the first sensor and the second sensor will not maintain an open signal state at the same time, thus ensuring the uniqueness of the zero position. If only the rotary structure is stuck during the entire stroke, the system will also sense the motor stall signal, thereby directly reporting the fault, which will not affect the zero position determination.

[0055] In fact, after the lamp is reset and enters the working state, the control system only controls the lamp to rotate forward and backward within the range of 0°-540°. The limit structure at the starting point ensures that when resetting, the rotating arm 210 will reverse and enter the zero position or is already in the zero position state. When the control system or sensor fails, the rotating arm 210 will hit the limit structure at the starting point and the end point to avoid greater losses.

[0056] in, Fig.16 This is a schematic diagram of the starting point of the physical limit of the lamp rotation mechanism. Fig.17 It is a schematic diagram of the end point of the physical limit of the lamp's rotating mechanism.

[0057] In the present invention, the first sensing element 310 and the second sensing element 330 are magnets. The first sensor and the second sensor are both Hall sensors. The magnet and the Hall sensor are combined as a zero position detection mechanism. Of course, it can be understood that the above detection induction can be achieved by changing the sensor type and the sensing element. For example, a reflective or directed infrared photoelectric sensor, a U-shaped photoelectric sensor + a sensing baffle, a laser sensing sensor group, a proximity switch or a micro switch with a wheel and other collision sensors can be used, all of which are within the scope of protection of the present invention.

[0058] In some specific embodiments, by simply changing the shapes of the inner limit rib and the outer limit rib of the positioning block 410 and adjusting the position of the second sensing element 330, its maximum stroke can be increased to 636°. Of course, the maximum stroke can also be reduced to within 360°-540°. This invention is suitable for a rotary mechanism with a one-way maximum stroke within 360°-630°.

[0059] Reference Fig.18 A lamp comprises a lamp arm 10 and a lamp rotating mechanism of the first embodiment, wherein the lamp arm 10 and the lamp rotating mechanism are fixedly connected. The lamp is a highly integrated product with a relatively compact structure, and the communication and power harnesses of the lamp are also arranged in the central hole of the main shaft 220. The lamp arm 10 is provided with a maintenance port, and the installation and fixing structure of the first sensor assembly 320 and the second sensor assembly 340 are designed in the maintenance port of the lamp arm 10. When the first sensor and the second sensor fail and need to be replaced, the fasteners of the first sensor assembly 320 and the second sensor assembly 340 can be conveniently screwed in the maintenance port to achieve rapid maintenance and replacement operations.

[0060] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the knowledge scope of ordinary technicians in the technical field without departing from the purpose of the present invention.

Claims

1. A lamp rotation mechanism, characterized in that: include: A base module, comprising a base and a rotating member arranged on the base; The swivel arm module comprises a swivel arm, a main shaft and a driving mechanism, wherein one end of the main shaft is connected to the swivel arm, and the other end of the main shaft is rotatably connected to the rotating member, the driving mechanism drives the swivel arm to rotate, and the driving mechanism is connected to the base through a transmission structure; as well as A zero position detection module, comprising a first zero position detection mechanism and a second zero position detection mechanism, wherein when both the first zero position detection mechanism and the second zero position detection mechanism are triggered, the lamp rotating mechanism is at a zero position; The lamp rotating mechanism also includes a limiting module, which includes a positioning block, a first limiting column and a second limiting column, wherein the first limiting column is arranged on the transmission structure, the second limiting column is arranged on the bottom surface of the rotating arm, the positioning block is sleeved on the main shaft, and the positioning block, the first limiting column and the second limiting column limit the starting point and the end point of the rotating arm; The positioning block includes a positioning plate, a first limiting block and a second limiting block, wherein the first limiting block is arranged on the outer ring side of the positioning plate, and the second limiting block is arranged on the outer ring side of the first limiting block; The first zero position detection mechanism includes a first induction member and a first sensor assembly, wherein the first induction member is arranged on the peripheral side of the base, and the first sensor assembly includes a first mounting plate and a first sensor, wherein the first sensor is fixed to the bottom surface of the rotating arm through the first mounting plate, and when the first induction member and the first sensor interfere with each other, the first sensor triggers an open signal state; The second zero-position detection mechanism includes a second sensing member and a second sensor assembly, the second sensing member is arranged on the positioning block, the second sensor assembly includes a second mounting plate and a second sensor, the second sensor is fixed to the bottom surface of the rotating arm through the second mounting plate, and when the second sensing member interferes with the second sensor, the second sensor triggers an open signal state.

2. The lamp rotating mechanism according to claim 1, characterized in that: The arc length of the first limiting block is greater than that of the second limiting block. Inner limiting ribs are formed on both sides of the first limiting block, and outer limiting ribs are formed on both sides of the second limiting block.

3. The lamp rotating mechanism according to claim 1, characterized in that: The transmission structure is a synchronous pulley, comprising a driving wheel, a driven wheel and a synchronous belt connecting the driving wheel and the driven wheel, and the driven wheel is arranged on the base.

4. The lamp rotating mechanism according to claim 1, characterized in that: The first induction member and the second induction member are magnets.

5. The lamp rotating mechanism according to any one of claims 1 to 4, characterized in that: The rotating member is a bearing.

6. A lamp, characterized in that: include: A lamp arm and a lamp rotating mechanism as described in any one of claims 1 to 5, wherein the lamp arm and the lamp rotating mechanism are fixedly connected.

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