Linkage lens adjusting mechanism and lighting device with same

Abstract

The utility model discloses a linkage lens adjusting mechanism and a lighting device with the linkage lens adjusting mechanism, and the linkage lens adjusting mechanism comprises a substrate; the lens assembly is used for changing the divergence angle of the light; a driving motor fixed with respect to the substrate and providing a driving force; one end of each transmission rod is connected with the lens assembly, and the other end of each transmission rod is driven by the driving motor; the transmission assembly is connected with a rotating shaft of the driving motor and all the transmission rods at the same time, and the driving force of the driving motor is transmitted to the transmission rods so as to drive the lens assembly to move in the length direction of the transmission rods. According to the scheme, the transmission assembly is adopted, the rotating shaft of the driving motor and all the transmission rods are connected at the same time, a linkage mode is adopted, a single motor drives a plurality of transmission rods to move, the lens assembly is made to move in the length direction of the transmission rods, use of the driving motor is reduced, and therefore the size occupied by the lens adjusting mechanism is effectively reduced. The mirror plate still receives the driving force through the at least two transmission rods, and it is guaranteed that the mirror plate can stably move.

Description

Technical Field

[0001] This utility model relates to the field of stage lighting technology, and more specifically, to a linkage lens adjustment mechanism and a lighting device having the same. Background Technology

[0002] Existing color-changing lamps typically feature at least one set of lens assemblies that can move up and down along the optical path to adjust the shape of the light spot. Specifically, the focusing lens assembly changes the sharpness of the light spot, while the magnifying lens assembly adjusts the size of the light spot to achieve richer light spot effects. Currently, most color-changing lamp adjustment mechanisms often use multiple lead screw motors to drive the lens assemblies simultaneously. While this multi-motor drive scheme ensures uniform force on the lens assemblies during movement, it also has some drawbacks.

[0003] First, the configuration of multiple motors results in a larger overall system size, making it difficult to reduce the overall size of the lamp, which limits applications requiring compact design and portability. Second, although this design theoretically provides more stable lens assembly movement, in practice, the simultaneous driving of multiple motors can easily lead to synchronization errors, resulting in problems such as movement stuttering. Therefore, there is an urgent need in the market for a more efficient and compact adjustment mechanism to optimize the focusing function of color-changing lamps. Utility Model Content

[0004] To overcome at least one of the defects described in the prior art, this utility model provides a linkage lens adjustment mechanism and an illumination device having the same, effectively reducing the volume occupied by the lens adjustment mechanism and ensuring that the lens assembly can move smoothly during focusing.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a linkage lens adjustment mechanism and an illumination device having the same, wherein the linkage lens adjustment mechanism includes a base plate; a lens assembly for changing the divergence angle of light; a drive motor fixed relative to the base plate and providing driving force; at least two transmission rods, one end of each transmission rod being connected to the lens assembly and the other end being driven by the drive motor; and a transmission assembly that connects the rotating shaft of the drive motor to all the transmission rods, transmitting the driving force of the drive motor to the transmission rods to drive the lens assembly to move along the length direction of the transmission rods.

[0006] The transmission assembly described in this solution connects the drive motor shaft to all the transmission rods in a linked manner, enabling a single motor to drive multiple transmission rods to move. This allows the lens assembly to move along the length of the transmission rods, reducing the number of drive motors used and thus effectively reducing the volume occupied by the lens adjustment mechanism, while also achieving a certain degree of noise reduction. At the same time, the lens assembly still relies on at least two transmission rods to receive the driving force, maintaining a balanced force and ensuring its smooth movement.

[0007] Furthermore, one end of the transmission rod is fixedly connected to the lens assembly. The rotational motion of the drive motor is converted into the movement of the transmission rod along its own length direction through the transmission assembly, thereby driving the lens assembly to move towards or away from the substrate. The transmission rod is fixed to one end of the lens assembly, and moves up and down relative to the substrate along its own length direction. When the lens assembly moves closer to the substrate, the transmission rod does not protrude from the lens assembly, resulting in a simpler structure.

[0008] Furthermore, the transmission rod is a lead screw, and the transmission assembly includes a lead screw nut sleeved on the transmission rod and a driven wheel coaxially fixedly connected to the lead screw nut. The lead screw nut is rotatably connected to the base plate, and the driven wheel is driven to rotate by the drive motor. The lead screw and the lead screw nut cooperate with each other. When the drive motor rotates, the lead screw nut rotates accordingly. Since the lead screw nut is rotatably connected to the base plate, the lead screw will move up and down relative to the base plate, realizing an efficient and smooth conversion from drive motor to linear motion.

[0009] Furthermore, the transmission assembly also includes a first bracket fixedly connected to the base plate. The first bracket has a U-shaped structure and each end has a pivot hole for the transmission rod to pass through. The two ends of the lead screw nut are each pivotally connected to the two pivot holes of the same first bracket via bearings. By utilizing the first bracket, the limitation on the installation position of the lead screw nut is overcome, allowing it to be installed in a specific location according to actual design requirements, facilitating both installation and subsequent maintenance.

[0010] Furthermore, the transmission assembly also includes a timing belt and a drive wheel fixedly connected to the shaft of the drive motor. The timing belt is simultaneously fitted onto both the drive wheel and each of the driven wheels. Using the timing belt to transmit the driving force of the drive motor to the driven wheels offers advantages such as high precision, low maintenance, and low noise.

[0011] Furthermore, it also includes a retaining post to keep the synchronous belt always taut. This ensures the synchronous belt remains taut throughout the transmission process, improving the reliability and efficiency of the entire transmission assembly.

[0012] Furthermore, the transmission assembly also includes a transmission gear and a drive wheel fixedly connected to the drive motor shaft. The transmission gear meshes with both the drive wheel and each of the driven wheels, transmitting the driving force of the drive motor to each of the transmission rods. This gear transmission method provides a fixed and accurate transmission ratio, making the movement of the lens assembly more precise.

[0013] Furthermore, the transmission gear is an internal gear, and the driving wheel and each of the driven wheels are located within the internal gear ring of the transmission gear. Utilizing a planetary gear transmission structure ensures efficient transmission while also making the transmission assembly more compact. Simultaneously, this transmission method possesses high impact resistance and load capacity, exhibiting good reliability and durability.

[0014] Furthermore, the drive motor is located at or near the center of the substrate, and each of the transmission rods is arranged along the edge of the substrate. This arrangement makes the lens assembly more evenly stressed, effectively avoiding jamming, and the reasonable arrangement can provide more installation space for other components.

[0015] This utility model also provides a lighting device, including a lamp head with a light outlet. The lamp head further includes any of the aforementioned lens adjustment mechanisms, a light-emitting element, and a heat sink. The light-emitting element and the lens assembly are arranged sequentially along the light emission direction, and the distance between the lens assembly and the light-emitting element is changed under the drive of the lens adjustment mechanism. Under the drive of the lens adjustment mechanism, the lens assembly receives the light emitted from the light-emitting element and changes its divergence angle. As the distance between them changes, the resulting light spot exhibits a richer effect.

[0016] Furthermore, the light-emitting element is disposed on the substrate. No additional plate is needed to mount the light-emitting element, making the internal structure of the lighting device more compact and effectively reducing weight.

[0017] Furthermore, the heat sink includes a mounting plate and several heat dissipation fins disposed on the side of the mounting plate away from the light-emitting element, and the substrate serves as the mounting plate of the heat sink. With this configuration, the motor can be positioned on the side of the mounting plate away from the light-emitting element, the transmission rod passes through the mounting plate, and a clearance space can be formed in the area of ​​the heat dissipation fins. When the lens assembly moves towards the substrate, the end of the transmission rod away from the lens assembly can enter the clearance space, resulting in a more compact structure and allowing for a further reduction in the size of the lamp head. Attached Figure Description

[0018] Figure 1 This is an exploded structural diagram of the lamp holder described in this utility model.

[0019] Figure 2 This is a schematic diagram of the assembled transmission component of this utility model.

[0020] Figure 3 This is an exploded structural diagram of the transmission rod, lead screw nut, and first bracket as described in this utility model.

[0021] Figure 4 This is a schematic diagram of the structure where the transmission rod is sleeved onto the lead screw nut and then installed on the first bracket.

[0022] Figure 5 This is a schematic diagram of the lamp holder structure when a synchronous belt is used for transmission.

[0023] Figure 6 This is a schematic diagram of the lamp holder structure when a transmission gear belt is used for power transmission.

[0024] Figure 7 This is a schematic diagram of a stage light structure with a linked lens adjustment mechanism.

[0025] In the picture:

[0026] 100. Substrate; 110. Limiting post; 200. Lens assembly; 300. Drive motor; 310. Drive wheel; 400. Transmission rod; 500. Transmission assembly; 510. Lead screw nut; 520. Driven wheel; 531. First bracket; 532. Second bracket; 533. Pivot hole; 534. Pressure cap; 535. Anti-loosening nut; 536. Bearing; 541. Synchronous belt; 542. Support post; 551. Transmission gear; 552. Transition gear; 600. Heat sink; 610. Mounting plate; 620. Heat dissipation fins; 700. Light guide; 810. Lamp head; 820. Support arm; 830. Base housing. Detailed Implementation

[0027] The accompanying drawings are for illustrative purposes only and should not be construed as limiting this patent. To better illustrate this embodiment, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings. The positional relationships described in the drawings are for illustrative purposes only and should not be construed as limiting this patent.

[0028] like Figures 1 to 3As shown, a linkage lens adjustment mechanism and an illumination device having the same are disclosed. The linkage lens adjustment mechanism includes a substrate 100; a lens assembly 200 for changing the divergence angle of light; a drive motor 300 fixed relative to the substrate 100 and providing driving force; at least two transmission rods 400, one end of which is connected to the lens assembly 200 and the other end is driven by the drive motor 300; and a transmission assembly 500 that connects the rotating shaft of the drive motor 300 to all the transmission rods 400, transmitting the driving force of the drive motor 300 to the transmission rods 400 to drive the lens assembly 200 to move along the length direction of the transmission rods 400.

[0029] The transmission component 500 described in this solution connects the rotating shaft of the drive motor 300 to all the transmission rods 400 in a linked manner, enabling a single motor to drive multiple transmission rods 400 to move. This allows the lens assembly 200 to move along the length of the transmission rods 400, reducing the number of drive motors 300 used and effectively reducing the volume occupied by the lens adjustment mechanism, as well as achieving a certain noise reduction effect. At the same time, the lens assembly 200 still relies on at least two transmission rods 400 to receive the driving force, maintaining a balanced force and ensuring its smooth movement.

[0030] Preferably, the lens on the lens assembly 200 can be selected as a Fresnel lens, a focusing lens, or a magnifying lens according to design requirements.

[0031] Preferably, the lens assembly 200 includes a plurality of limiting posts 110, which limit the travel of the lens assembly 200 along the direction close to the substrate 100, thereby preventing the lens assembly 200 from colliding with the substrate 100 or other components.

[0032] In a preferred embodiment of this invention, one end of the transmission rod 400 is fixedly connected to the lens assembly 200. The rotational motion of the drive motor 300 is converted into the movement of the transmission rod 400 along its own length direction through the transmission assembly 500, thereby driving the lens assembly 200 to move towards or away from the substrate 100. The transmission rod 400 is fixed to one end of the lens assembly 200, and the transmission rod 400 moves up and down relative to the substrate 100 along its own length direction. When the lens assembly 200 moves closer to the substrate 100, the transmission rod 400 does not protrude from the lens assembly 200, resulting in a simpler structure. Preferably, the transmission rod 400 is fixedly connected to the lens assembly 200 using screws.

[0033] In a preferred embodiment of this utility model, the transmission rod 400 is a lead screw, and the transmission assembly 500 includes a lead screw nut 510 sleeved on the transmission rod 400, and a driven wheel 520 coaxially fixedly connected to the lead screw nut 510. The lead screw nut 510 is rotatably connected to the base plate 100, and the driven wheel 520 is driven to rotate by the drive motor 300. The lead screw and the lead screw nut 510 cooperate with each other. When the drive motor 300 rotates, the lead screw nut 510 rotates accordingly. Since the lead screw nut 510 is rotatably connected to the base plate 100, the lead screw will move up and down relative to the base plate 100, realizing an efficient and smooth conversion from the drive motor 300 to linear motion. Preferably, the driven wheel 520 is fixedly connected to the lead screw nut 510 by screws.

[0034] In a preferred embodiment of this utility model, the transmission assembly 500 further includes a first bracket 531 fixedly connected to the base plate 100. The first bracket 531 has a U-shaped structure and each end is provided with a pivot hole 533 for the transmission rod 400 to pass through. The two ends of the lead screw nut 510 are respectively pivotally connected to the two pivot holes 533 of the same first bracket 531 via bearings 536. By utilizing the first bracket 531, the limitation on the installation position of the lead screw nut 510 is overcome, allowing it to be installed in a specific position according to actual design requirements, facilitating both installation and subsequent maintenance. One end face of the first bracket 531 is fixedly installed on the base plate 100, and the base plate 100 is provided with a through hole corresponding to the pivot hole 533 for the transmission rod 400 to pass through.

[0035] Preferably, the transmission rod 400 passes through both pivot holes 533 of the first bracket 531. A pressure cap 534 is fixedly connected to one end of the first bracket 531 away from the lens assembly 200. The pressure cap 534 is also provided with a through hole for the transmission rod 400 to pass through. An anti-loosening nut 535 is connected to one end of the transmission rod 400 near the through hole. The cooperation between the pressure cap 534 and the anti-loosening nut 535 prevents the transmission rod 400 from becoming loose from the transmission assembly 500.

[0036] In other embodiments of this utility model, the transmission rod 400 is a lead screw, the lens assembly 200 is fixedly connected to a nut, and is slidably connected to the transmission rod 400 through the nut. When the drive motor 300 drives the lead screw to rotate through the transmission assembly 500, the lens assembly 200 moves up and down along the length of the lead screw.

[0037] like Figure 1 and Figure 5 As shown, Figure 5In this preferred embodiment, the lens assembly 200 is located at its extreme position along its travel stroke close to the substrate 100. The transmission assembly 500 further includes a timing belt 541 and a drive wheel 310 fixedly connected to the shaft of the drive motor 300. The timing belt 541 is simultaneously fitted onto the drive wheel 310 and each of the driven wheels 520. The method of transmitting the driving force of the drive motor 300 to the driven wheels 520 using the timing belt 541 offers advantages such as high precision, low maintenance, and low noise.

[0038] In a preferred embodiment of this invention, a retaining post 542 is further included to keep the synchronous belt 541 in a taut state at all times. This ensures that the synchronous belt 541 remains taut during transmission, improving the reliability and efficiency of the entire transmission assembly 500.

[0039] Preferably, when the drive motor 300 is located at the center of the substrate 100, the abutment is arranged around the drive motor 300 so that the timing belt 541 is always engaged with the drive wheel 310 on the drive motor 300.

[0040] like Figure 1 and Figure 6 As shown, in Figure 6 In this embodiment, the lens assembly 200 is located at its extreme position along its travel distance from the substrate 100. In a preferred embodiment, the transmission assembly 500 further includes a transmission gear 551 and a drive wheel 310 fixedly connected to the shaft of the drive motor 300. The transmission gear 551 meshes with both the drive wheel 310 and each of the driven wheels 520, transmitting the driving force of the drive motor 300 to each of the transmission rods 400. This gear transmission provides a fixed and accurate transmission ratio, making the movement of the lens assembly 200 more precise.

[0041] In a preferred embodiment of this utility model, the transmission gear 551 is an internal gear, and the driving wheel 310 and each of the driven wheels 520 are located in the internal gear ring of the transmission gear 551. Utilizing the planetary gear transmission structure, while ensuring efficient transmission, the structure of the transmission assembly 500 is further made more compact. Simultaneously, this transmission method also possesses high impact resistance and load capacity, exhibiting good reliability and durability.

[0042] Preferably, when the drive motor 300 is located at the center of the substrate 100, the drive wheel 310 meshes with each of the driven wheels 520 through the transition gear 552.

[0043] In a preferred embodiment of this invention, the drive motor 300 is located at or near the center of the substrate 100, and each of the transmission rods 400 is arranged along the edge of the substrate 100. This arrangement makes the lens assembly 200 more evenly stressed, effectively avoiding jamming, and the reasonable arrangement can provide more installation space for other components.

[0044] Preferably, in order to drive the drive plate more smoothly, the number of transmission rods 400 is set to 3, and they are evenly spaced along the edge of the substrate 100.

[0045] like Figure 1 and 7 As shown, this utility model also provides a lighting device, including a lamp head 810 with a light outlet. The lamp head 810 further includes any of the aforementioned lens adjustment mechanisms, a light-emitting element, and a heat sink 600. The lens assembly 200 and the light-emitting element are arranged sequentially along the light emission direction, and the distance between the lens assembly 200 and the light-emitting element is changed under the drive of the lens adjustment mechanism. Under the drive of the lens adjustment mechanism, the lens assembly 200 receives the light emitted from the light-emitting element and changes its divergence angle. As the distance between them changes, the resulting light spot exhibits a richer effect.

[0046] Preferably, the lighting device is a color-changing lamp.

[0047] Preferably, it also includes a support arm 820 for pivoting the lamp head 810, and a base housing 830 for pivoting the support arm 820. The lamp head 810 can project light spots onto the target plane from multiple angles, enriching the stage effect.

[0048] In a preferred embodiment of this invention, the light-emitting element is disposed on the substrate 100. This eliminates the need for a separate plate to mount the light-emitting element, making the structure of the lighting device more compact and effectively reducing weight.

[0049] Preferably, the radiator 600 includes a mounting plate 610, the drive motor 300 is fixedly mounted on the mounting plate via a second bracket 532, the transmission rod 400 is rotatably connected to the base plate 100 via a first bracket 531, and there is a clearance space between the base plate 100 and the mounting plate 610 for the transmission rod 400 to extend into.

[0050] Optionally, a separate light panel can be provided for mounting several of the aforementioned light-emitting elements.

[0051] Preferably, the light-emitting element is an LED chip, and the light-emitting element further includes a light guide 700 for mixing the light emitted by the LED chip, wherein the light-incident surface of the light guide 700 is in close contact with the LED chip; under the drive of the lens adjustment mechanism, the lens assembly 200 moves along the light-emitting surface that is close to or away from the light guide 700.

[0052] In a preferred embodiment of this utility model, the heat sink 600 includes a mounting plate 610 and a plurality of heat dissipation fins 620 disposed on the side of the mounting plate 610 away from the light-emitting element, and the substrate 100 is the mounting plate 610 of the heat sink 600. With this arrangement, the motor can be disposed on the side of the mounting plate 610 away from the light-emitting element, the transmission rod 400 passes through the mounting plate 610, and the area of ​​the heat dissipation fins 620 can form a clearance space. When the lens assembly 200 moves towards the substrate 100, the end of the transmission rod 400 away from the lens assembly 200 can enter the clearance space, resulting in a more compact structure, and the size of the lamp head 810 can be further reduced.

[0053] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A linkage lens adjustment mechanism characterized by, The application relates to a lens driving device, which comprises the following components: a substrate (100); a lens assembly (200) for changing the divergence angle of light rays; a driving motor (300) fixed relative to the substrate (100) and providing driving force; at least two transmission rods (400) connected to one end of the lens assembly (200) and driven by the driving motor (300); and a transmission assembly (500) simultaneously connected to the rotating shaft of the driving motor (300) and all the transmission rods (400) and transmitting the driving force of the driving motor (300) to the transmission rods (400) so as to drive the lens assembly (200) to move along the length direction of the transmission rods (400).

2. The lens adjustment mechanism according to claim 1, characterized by, One end of the transmission rod (400) is fixedly connected to the lens assembly (200), and the rotating movement of the driving motor (300) is converted into the movement of the transmission rod (400) along its length direction through the transmission assembly (500), so as to drive the lens assembly (200) to move in the direction of approaching or moving away from the substrate (100).

3. The lens adjustment mechanism according to claim 2, characterized by, The transmission rod (400) is a screw rod, the transmission assembly (500) comprises a screw rod nut (510) sleeved outside the transmission rod (400) and a driven wheel (520) coaxially fixedly connected to the screw rod nut (510), the screw rod nut (510) is rotationally connected to the substrate (100), and the driven wheel (520) is driven to rotate by the driving motor (300).

4. The lens adjustment mechanism according to claim 3, characterized by, The transmission assembly (500) further comprises a first support (531) fixedly connected to the substrate (100), the first support (531) is in a U-shaped structure and is provided with a pivot hole (533) for the transmission rod (400) to pass through at each end, and the two ends of the screw rod nut (510) are respectively pivotally connected to the two pivot holes (533) of the same first support (531) through bearings (536).

5. The lens adjustment mechanism according to claim 3, characterized by, The transmission assembly (500) further comprises a synchronous belt (541) and a driving wheel (310) fixedly connected to the rotating shaft of the driving motor (300), and the synchronous belt (541) is sleeved on the driving wheel (310) and each driven wheel (520).

6. The lens adjustment mechanism according to claim 5, characterized by, The transmission assembly (500) further comprises a transmission gear (551) and a driving wheel (310) fixedly connected to the rotating shaft of the driving motor (300), the transmission gear (551) is engaged with the driving wheel (310) and each driven wheel (520) at the same time, and the driving force of the driving motor (300) is transmitted to each transmission rod (400).

7. The lens adjustment mechanism according to claim 3, characterized by, The transmission gear (551) is an internal gear, and the driving wheel (310) and each driven wheel (520) are located in the inner gear ring of the transmission gear (551).

8. The lens adjustment mechanism according to claim 7, characterized by, The driving motor (300) is located at the center of the substrate (100) or in the vicinity thereof, and each transmission rod (400) is arranged along the edge of the substrate (100).

9. The lens adjustment mechanism of claim 1, wherein ​ 10. An illumination device comprising a lamp head (800) having a light exit opening, characterized in that The lamp head (800) further comprises the lens adjusting mechanism, the light emitting element and the heat sink (600) according to any one of claims 1 to 9, the light emitting element is sequentially arranged with the lens assembly (200) along the light exit direction, and the distance between the lens assembly (200) and the light emitting element is changed under the driving of the lens adjusting mechanism.

11. The illumination device of claim 10, wherein, The light emitting element is arranged on the substrate (100).

12. The illumination device of claim 10, wherein, The heat sink (600) comprises a mounting plate (610) and a plurality of heat dissipation fins (620) arranged on the side of the mounting plate (610) away from the light emitting element, and the substrate (100) is the mounting plate (610) of the heat sink (600).

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