A luminaire having a lever lock assembly

Abstract

The utility model discloses a lamp with lever type locking assembly, including the lamp head for sending light and the support seat of supporting lamp head rotation, still include lever type locking assembly, lever type locking assembly includes the pivot joint axle connection of lamp head and carousel and the friction plate opposite setting of carousel, still include multistage lever and the control rod of multistage lever power supply, multistage lever will control rod's power amplification, drive friction plate and carousel opposite close, thereby make friction plate limit carousel rotation. Through multistage lever, when realizing same amplification multiple, the length of each lever has been reduced, and because the friction torque between friction plate and carousel, can further amplify the friction and act on the pivot joint axle, so even if the weight of lamp head is bigger, also can easily through control rod manual locking.

Description

Technical Field

[0001] This utility model relates to the field of stage lighting technology, and more specifically, to a lighting fixture with a lever-type locking component. Background Technology

[0002] In performance lighting fixtures, the lamp head typically rotates freely relative to its support base, thus altering the beam direction. This rotation can be electrically or manually adjusted. Sometimes, it's necessary to lock the lamp head angle. If the angle is electrically adjustable, power is consumed to maintain the position. If it's manually adjustable, an additional locking mechanism is required. Most locking mechanisms currently only lock the lamp head to a few predetermined angles, lacking stepless locking to fix it at any angle. While some locking mechanisms can achieve stepless locking, limitations in force application or fixture structure restrict the locking force provided, making them unsuitable for locking heavier lamp heads. Utility Model Content

[0003] To overcome at least one of the defects described in the prior art, this utility model provides a lamp with a lever-type locking assembly, which can amplify the force of the control lever by using multiple levers, thereby locking the heavier lamp head at any angle.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a lamp with a lever-type locking assembly, including a lamp head for emitting light and a support base for supporting the rotation of the lamp head, and a lever-type locking assembly. The lever-type locking assembly includes a turntable pivotally connected to the lamp head and a friction plate disposed opposite to the turntable. It also includes a multi-stage lever and a control lever that provides power to the multi-stage lever. The multi-stage lever amplifies the power of the control lever and drives the friction plate to move closer to the turntable, thereby restricting the rotation of the turntable by the friction plate.

[0005] The lamp with lever-type locking assembly uses multiple levers to reduce the length of each lever while achieving the same magnification. The multiple levers amplify the power of the control lever and transmit it to the friction plate or turntable, causing the friction plate or turntable to move closer together and abut against each other. This allows the friction plate to provide frictional force to the turntable, directly locking the turntable and indirectly locking the pivot shaft connected to the turntable. Furthermore, due to the frictional torque between the friction plate and the turntable, the frictional force can be further amplified and applied to the pivot shaft. Thus, even if the lamp head is heavy, it can be easily locked manually using the control lever.

[0006] Furthermore, the control lever includes a screw and a threaded sleeve threadedly connected to the screw. Rotation of the screw causes the threaded sleeve to move along it, thereby acting on the multi-stage lever. The threaded sleeve can convert the circumferential rotation of the screw into axial movement, and by rotating the screw multiple times while the threaded sleeve moves only a small distance, the rotational force of the screw can be amplified, thus providing a greater force to the multi-stage lever.

[0007] Furthermore, the lever-type locking assembly also includes a first pressure plate, with the friction plate clamped between the first pressure plate and the turntable. The multi-stage levers act on the first pressure plate to drive the friction plate and the turntable to move closer together. By using the pressure plate to hold the friction plate as a whole, the friction plate can be subjected to more even force, avoiding damage caused by excessive local pressure.

[0008] Furthermore, the lever-type locking assembly also includes a second pressure plate, which is slidably mounted on the guide post of the first pressure plate and the distance between the second pressure plate and the first pressure plate is adjusted by bolts. Another friction plate is clamped between the second pressure plate and the turntable. By adjusting the force of the second pressure plate against the friction plate by bolts, the resistance force encountered by the turntable during rotation can be pre-adjusted, and even the lamp head can be suspended at any angle without external force.

[0009] Furthermore, the multi-stage lever includes a first lever and a second lever that are mutually abutting or hinged together. The free end of the first lever acts on the friction plate, and the free end of the second lever cooperates with the control lever. By pushing the free end of the second lever through the control lever, the free end of the first lever amplifies the power of the control lever and pushes against the friction plate. Through the two-stage amplification of the first and second levers, a sufficiently large supporting force on the friction plate can be achieved using a simplified and stable structure.

[0010] Furthermore, the two ends of the first lever are located on both sides of the control lever. That is, the free end of the second lever extends in approximately the same direction as the free end of the first lever. In other words, after the free end of the second lever is folded back, it cooperates with the control lever, which can effectively reduce the overall length of the first lever and the second lever, thereby reducing the volume of the lever-type locking assembly.

[0011] Furthermore, the first lever has a strip-shaped hole along its length, and the second lever passes through the strip-shaped hole, with its two ends located on both sides of the first lever. That is, the free end and the connecting end of the second lever are located on both sides of the first lever, which can effectively reduce the overall width of the first lever and the second lever, thereby reducing the volume of the lever-type locking assembly.

[0012] Furthermore, the turntable is provided with a clearance hole corresponding to the control lever, through which the control lever passes. The clearance hole provides space for the movement of the control lever, preventing the control lever from protruding too much from the lamp, and allowing the lever-type locking assembly structure to be more compact.

[0013] Furthermore, the lever-type locking assembly also includes a first pressure plate and a second pressure plate slidably disposed on a guide post of the first pressure plate. The turntable is located between the first pressure plate and the first pressure plate, and the friction plate is clamped between the turntable and the first pressure plate. The operating lever applies a force away from the turntable to the free end of the second lever. A second abutment plate disposed on the second pressure plate supports the second lever towards the turntable at the connection end near the second lever. The connection end of the second lever applies a force near the turntable to the connection end of the first lever. The second lever has an abutment protrusion near its free end that abuts against the second pressure plate. A first abutment plate disposed on the first pressure plate supports the first lever towards the turntable at the free end of the first lever. The second abutment plate serves as the fulcrum of the second lever and is fixed relative to the second pressure plate. The first abutment plate serves as the fulcrum of the first lever and is fixed relative to the first pressure plate. Thus, when the operating lever applies a force away from the turntable to the free end of the second lever, the free end of the first lever applies a force close to the first pressure plate to the second pressure plate. This causes the first pressure plate and the turntable to clamp the friction plate together, and the turntable is restricted from rotating by the friction force of the friction plate.

[0014] Furthermore, the connecting post on the second pressure plate passes through the second lever and connects to the second supporting plate. The second lever has a movable hole corresponding to the connecting post. The movable hole allows the second lever to rotate without interfering with the connecting post, and the second supporting plate is fixed to the second pressure plate by the connecting post passing through the second lever, which makes the multi-stage lever structure more compact.

[0015] Furthermore, the control lever includes a screw and a threaded sleeve threadedly connected to the screw. The threaded sleeve is fitted into a through hole in the second pressure plate, and the cross-section of the threaded sleeve is non-circular. The threaded sleeve abuts against the free end of the second lever. Because the threaded sleeve is fitted into the through hole in the second pressure plate, and the cross-section of the threaded sleeve is non-circular, during the rotation of the screw, the threaded sleeve will not rotate within the through hole, but will move along the screw, pushing against the free end of the second lever.

[0016] Furthermore, the second lever has a through hole corresponding to the screw. After the screw passes through the through hole, it engages with the threaded sleeve. The threaded sleeve is always located on the side of the second lever away from the second abutment plate. This reduces the space occupied by the second lever and the operating lever, making the lever-type locking assembly more compact.

[0017] Furthermore, the first or second pressure plate is fixed in position on the control lever. This allows the other plate to move relative to the control lever, thereby compressing the friction plate.

[0018] Furthermore, the multi-stage lever amplifies the force applied to it by the control lever by at least 10 times, the friction radius between the friction plate and the turntable is greater than 1 cm, and / or the relative coefficient of friction between the friction plate and the turntable is greater than 0.5. This maximizes the amplification of the control lever's power to achieve a locking force far exceeding that of typical locking assemblies.

[0019] Furthermore, the pivot shaft is fixed to the lamp head, the lever-type locking assembly is fixed to the support base, and the turntable rotates with the pivot shaft. In this way, the control lever remains stationary relative to the support base and does not rotate with the lamp head, making it more convenient to operate. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the lamp with lever-type locking components according to this utility model.

[0021] Figure 2 This is a cross-sectional structural diagram of a lamp with a lever-type locking assembly according to the present invention.

[0022] Figure 3 yes Figure 2 Enlarged structural diagram of part A in the middle.

[0023] Figure 4 This is an exploded structural diagram of the lever-type locking assembly of this utility model.

[0024] Figure 5 This is a schematic diagram of the combined structure of the lever-type locking assembly of this utility model.

[0025] Figure 6 This is a cross-sectional structural diagram of the lever-type locking assembly of this utility model.

[0026] In the picture:

[0027] 100. Lamp holder; 200. Support base; 210. Base shell; 310. Pivot shaft; 400. Lever-type locking assembly; 410. Turntable; 411. Clearance hole; 420. Friction plate; 430. Multi-stage lever; 431. First lever; 4311. Strip hole; 4312. Supporting protrusion; 432. Second lever; 4321. Movable hole; 4322. Through hole; 440. Control lever; 441. Screw; 442. Screw sleeve; 443. Knob; 450. First pressure plate; 451. Guide post; 452. First supporting plate; 460. Second pressure plate; 461. Bolt; 462. Second supporting plate; 463. Connecting post; 464. Through hole; 465. Screw. Detailed Implementation

[0028] 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.

[0029] like Figures 1 to 6 This utility model provides a lamp with a lever-type locking assembly 400, including a lamp head 100 for emitting light and a support base 200 for supporting the rotation of the lamp head 100. It also includes a lever-type locking assembly 400, which includes a turntable 410 connected to a pivot shaft 310 of the lamp head 100 and a friction plate 420 disposed opposite to the turntable 410. It also includes a multi-stage lever 430 and a control lever 440 for providing power to the multi-stage lever 430. The multi-stage lever 430 amplifies the power of the control lever 440 and drives the friction plate 420 to move closer to the turntable 410, thereby restricting the rotation of the turntable 410 by the friction plate 420.

[0030] The lamp with lever-type locking assembly 400 reduces the length of each lever while achieving the same magnification through multi-stage levers 430. The multi-stage levers 430 amplify the power of the control lever 440 and transmit it to the friction plate 420 or the turntable 410, causing the friction plate 420 or the turntable 410 to move closer to each other and abut against each other. This allows the friction plate 420 to provide frictional force to the turntable 410, directly locking the turntable 410 and indirectly locking the pivot shaft 310 connected to the turntable 410. Furthermore, since there is a frictional torque between the friction plate 420 and the turntable 410, the frictional force can be further amplified and applied to the pivot shaft 310. Thus, even if the lamp head 100 is heavy, it can be easily locked manually by the control lever 440.

[0031] In this embodiment, the control lever 440 moves along the length of the pivot shaft 310 to act on the multi-stage lever 430.

[0032] In this embodiment, the angle of the lamp head 100 is adjusted manually rather than electrically.

[0033] Optionally, the support base 200 includes an arm that supports the rotation of the lamp head 100 and a housing that supports the rotation of the arm.

[0034] In this embodiment, the turntable 410 is made of metal and the friction plate 420 is made of plastic. Specifically, the turntable 410 is made of stainless steel and the friction plate 420 is made of polytetrafluoroethylene.

[0035] In a preferred embodiment of this invention, the control lever 440 includes a screw 441 and a threaded sleeve 442 threadedly connected to the screw 441. Rotation of the screw 441 causes the threaded sleeve 442 to move along it, thereby acting on the multi-stage lever 430. The threaded sleeve 442 can convert the circumferential rotation of the screw 441 into axial movement. Furthermore, by rotating the screw 441 multiple times while the threaded sleeve 442 moves only a small distance, the rotational force of the screw 441 is amplified, thus providing a greater force to the multi-stage lever 430.

[0036] In this embodiment, the threaded sleeve 442 preferably exerts a greater force on the multi-stage lever 430 when moving closer to the pivot shaft 310. In other embodiments, the force exerted on the multi-stage lever 430 may also increase when moving away from the pivot shaft 310.

[0037] In this embodiment, the thread between the screw 441 and the sleeve 442 is an M4 screw structure.

[0038] In this embodiment, a knob 443 is connected to the end of the screw 441 away from the screw sleeve 442. The knob 443 facilitates applying rotational force to the screw 441 and can generate a certain torque, thereby making the rotation of the screw 441 easier.

[0039] In this embodiment, the knob 443 includes a connecting plate perpendicularly connected to the screw 441, an annular surrounding plate disposed on the connecting plate, and a force-applying plate located inside the annular surrounding plate and perpendicular to the connecting plate, the two ends of the force-applying plate being connected to the inner side of the annular surrounding plate. The length of the force-applying plate is at least 5 times the width of the screw 441, preferably at least 10 times.

[0040] In a preferred embodiment of this invention, the lever-type locking assembly 400 further includes a first pressure plate 450, and the friction plate 420 is clamped between the first pressure plate 450 and the turntable 410. The multi-stage lever 430 acts on the first pressure plate 450 to drive the friction plate 420 and the turntable 410 to move closer together. By using the pressure plate to hold the friction plate 420 as a whole, the friction plate 420 can be subjected to more even force, avoiding damage caused by excessive local pressure.

[0041] In this embodiment, the first pressure plate 450 is parallel to the friction plate 420.

[0042] In a preferred embodiment of this utility model, the lever-type locking assembly 400 further includes a second pressure plate 460. The second pressure plate 460 is slidably disposed on the guide post 451 of the first pressure plate 450, and the distance between the second pressure plate 460 and the first pressure plate 450 is adjusted by bolts 461. Another friction piece 420 is clamped between the second pressure plate 460 and the turntable 410. By adjusting the force of the second pressure plate 460 against the friction piece 420 by bolts 461, the resistance force encountered by the turntable 410 during rotation can be pre-adjusted, and even the lamp head 100 can be suspended at any angle without external force. Then, by moving the operating rod, the first pressure plate 450 and the turntable 410 are driven to clamp the friction piece 420 between them, achieving complete locking.

[0043] In this embodiment, both the second pressure plate 460 and the first pressure plate 450 are annular, and the four guide posts 451 are evenly arranged on the first pressure plate 450 along its circumference, and the four bolts 461 are also evenly arranged on the second pressure plate 460 along its circumference.

[0044] In this embodiment, the friction plate 420 is also annular.

[0045] In a preferred embodiment of this invention, the multi-stage lever 430 includes a first lever 431 and a second lever 432 that abut against each other or are hinged together. The free end of the first lever 431 acts on the friction plate 420, and the free end of the second lever 432 cooperates with the operating lever 440. By pushing the free end of the second lever 432 through the operating lever 440, the free end of the first lever 431 amplifies the power of the operating lever 440 and pushes against the friction plate 420. Through the two-stage amplification of the first lever 431 and the second lever 432, a sufficiently large supporting force on the friction plate 420 can be achieved using a simplified and stable structure.

[0046] In this embodiment, the first lever 431 and the second lever 432 are connected by mutual abutment and can rotate relative to each other.

[0047] In a preferred embodiment of this utility model, the two ends of the first lever 431 are respectively located on both sides of the operating lever 440. That is, the free end of the second lever 432 extends in approximately the same direction as the free end of the first lever 431. In other words, after the free end of the second lever 432 is folded back, it cooperates with the operating lever 440, which can effectively reduce the overall length of the first lever 431 and the second lever 432, thereby reducing the volume of the lever-type locking assembly 400.

[0048] In other embodiments, the free end of the second lever 432 may extend in substantially opposite directions to the free end of the first lever 431.

[0049] In a preferred embodiment of this utility model, the first lever 431 has a strip-shaped hole 4311 along its length, and the second lever 432 passes through the strip-shaped hole 4311, with its two ends located on both sides of the first lever 431. That is, the free end and the connecting end of the second lever 432 are located on both sides of the first lever 431, which can effectively reduce the overall width of the first lever 431 and the second lever 432, thereby reducing the volume of the lever-type locking assembly 400. Obviously, at this time, the width of the strip-shaped hole 4311 is greater than the width of the second lever 432 to facilitate its movement within the strip-shaped hole 4311.

[0050] In a preferred embodiment of this utility model, the turntable 410 is provided with a clearance hole 411 corresponding to the control lever 440, and the control lever 440 passes through the clearance hole 411. The clearance hole 411 provides space for the movement of the control lever 440, preventing the control lever 440 from protruding too much from the lamp, and making the structure of the lever-type locking assembly 400 more compact.

[0051] In this embodiment, the end face of the pivot shaft 310 is also provided with a clearance groove corresponding to the control lever 440, so as to make room for the movement of the control lever 440.

[0052] In this embodiment, the centerline of the control lever 440 coincides with the rotation axis of the pivot shaft 310. This minimizes the area of ​​the clearance hole 411 / clearance groove.

[0053] In a preferred embodiment of this utility model, the lever-type locking assembly 400 further includes a first pressure plate 450 and a second pressure plate 460 slidably disposed on a guide post 451 of the first pressure plate 450. The turntable 410 is located between the first pressure plate 450 and the first pressure plate 450, and the friction plate 420 is clamped between the turntable 410 and the first pressure plate 450. The operating lever 440 applies a force away from the turntable 410 to the free end of the second lever 432, which is disposed on the second pressure plate 460. The second abutment plate 462 supports the second lever 432 towards the turntable 410 at the connection end near the second lever 432. The connection end of the second lever 432 applies a force near the turntable 410 to the connection end of the first lever 431. The first lever 431 has an abutment protrusion 4312 near its free end to abut against the second pressure plate 460. The first abutment plate 452, disposed on the first pressure plate 450, supports the first lever 431 towards the turntable 410 at the free end of the first lever 431. The second abutment plate 462 serves as the fulcrum of the second lever 432 and is fixed relative to the second pressure plate 460. The first abutment plate 452 serves as the fulcrum of the first lever 431 and is fixed relative to the first pressure plate 450. Thus, when the operating lever 440 applies a force away from the turntable 410 to the free end of the second lever 432, the free end of the first lever 431 applies a force close to the first pressure plate 450 to the second pressure plate 460. This causes the first pressure plate 450 and the turntable 410 to clamp the friction plate 420 together, and the turntable 410 is restricted from rotating by the friction of the friction plate 420.

[0054] In this embodiment, both the first lever 431 and the second lever 432 are plate-shaped, which makes them more stable when they support each other.

[0055] In a preferred embodiment of this invention, a connecting post 463 on the second pressure plate 460 passes through the second lever 432 and connects to the second supporting plate 462. The second lever 432 is provided with a movable hole 4321 corresponding to the connecting post 463. The movable hole 4321 allows the second lever 432 to rotate without interfering with the connecting post 463, and the second supporting plate 462 is fixed to the second pressure plate 460 by the connecting post 463 passing through the second lever 432, which makes the structure of the multi-stage lever 430 more compact.

[0056] In this embodiment, the connecting post 463 is fixed to the second pressure plate 460 by screws 465.

[0057] In this embodiment, the first pressure plate 450 is installed on the first pressure plate 450 by a support column, and the second pressure plate 460 is provided with an avoidance notch corresponding to the support column.

[0058] In a preferred embodiment of this utility model, the control lever 440 includes a screw 441 and a threaded sleeve 442 threadedly connected to the screw 441. The threaded sleeve 442 is fitted into a through hole 464 on the second pressure plate 460, and the cross-section of the threaded sleeve 442 is non-circular. The threaded sleeve 442 abuts against the free end of the second lever 432. Because the threaded sleeve 442 is fitted into the through hole 464 on the second pressure plate 460, and the cross-section of the threaded sleeve 442 is non-circular, during the rotation of the screw 441, the threaded sleeve 442 will not rotate within the through hole 464, but will move along the screw 441, pushing against the free end of the second lever 432.

[0059] In this embodiment, the screw sleeve 442 has a square cross-section, and an arc-shaped protrusion is formed at one end that abuts against the second lever 432, so that the angle between the second lever 432 and the screw sleeve 442 changes more smoothly when abutting against the second lever 432.

[0060] In this embodiment, the turntable 410, the friction plate 420, and the first pressure plate 450 all correspondingly avoid the threaded sleeve 442.

[0061] In a preferred embodiment of this invention, the second lever 432 is provided with a through hole 4322 corresponding to the screw 441. After the screw 441 passes through the through hole 4322, it engages with the threaded sleeve 442. The threaded sleeve 442 is always located on the side of the second lever 432 away from the second abutment plate 462. This reduces the space occupied by the second lever 432 and the operating lever 440, making the lever-type locking assembly 400 more compact.

[0062] In a preferred embodiment of this invention, the first pressure plate 450 or the second pressure plate 460 is fixed in position on the control lever 440. This allows the other plate to move relative to the control lever 440, thereby pressing the friction plate 420. Although the turntable 410 is pivotally connected to the lamp head 100, when pressed by the friction plate 420, the turntable 410 may slightly deform under force or slightly move due to a slight gap between the lamp head 100 and the support base 200, thereby abutting against the second pressure plate 460 or the friction plate 420 between the second pressure plate 460 and the turntable 410, generating a synergistic frictional force that further locks the turntable 410.

[0063] In a preferred embodiment of this invention, the multi-stage lever 430 amplifies the force applied to it by the control lever 440 by at least 10 times, the friction radius between the friction plate 420 and the turntable 410 is greater than 1 cm, and / or the relative coefficient of friction between the friction plate 420 and the turntable 410 is greater than 0.5. This maximizes the amplification of the power of the control lever 440, achieving a locking force far exceeding that of typical locking assemblies.

[0064] In this embodiment, the multi-stage lever 430 amplifies the force applied to it by the control lever 440 by at least 20 times, the friction radius between the friction plate 420 and the turntable 410 is greater than 2 cm, and the relative coefficient of friction between the friction plate 420 and the turntable 410 is greater than 1.3.

[0065] In a preferred embodiment of this utility model, the pivot shaft 310 is fixed to the lamp head 100, the lever-type locking assembly 400 is fixed to the support base 200, and the turntable 410 rotates with the pivot shaft 310. This way, the control lever 440 remains stationary relative to the support base 200 and does not rotate with the lamp head 100, making it more convenient to operate.

[0066] For example, the first pressure plate 450 or the second pressure plate 460 is fixedly connected to the base shell 210 of the support 200, the knob 443 of the operating rod abuts against the outside of the base shell 210, and the screw 441 passes through the base shell 210 and cooperates with the multi-stage lever 430.

[0067] In other embodiments, the pivot shaft 310 may be fixed to the support base 200, and the lever-type locking assembly 400 may be fixed to the lamp head 100. The lever-type locking assembly 400 may rotate around the pivot shaft 310 along with the lamp head 100, while the pivot shaft 310 may not rotate. If the angle of the lamp head 100 is electrically adjustable, then the electric adjustment motor will be located inside the lamp head 100.

[0068] 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 lamp with a lever-type locking assembly, characterized in that, The device includes a lamp head (100) for emitting light and a support base (200) for supporting the rotation of the lamp head (100). It also includes a lever-type locking assembly (400), which includes a turntable (410) connected to a pivot shaft (310) of the lamp head (100) and a friction plate (420) disposed opposite to the turntable (410). The device also includes a multi-stage lever (430) and a control lever (440) for providing power to the multi-stage lever (430). The multi-stage lever (430) amplifies the power of the control lever (440) and drives the friction plate (420) to move closer to the turntable (410), thereby restricting the rotation of the turntable (410) by the friction plate (420).

2. The lamp with a lever-type locking assembly according to claim 1, characterized in that, The control lever (440) includes a screw (441) and a sleeve (442) threadedly connected to the screw (441). Rotation of the screw (441) causes the sleeve (442) to move along it, thereby acting on the multi-stage lever (430).

3. The lamp with a lever-type locking assembly according to claim 1, characterized in that, The lever-type locking assembly (400) further includes a first pressure plate (450), the friction plate (420) is clamped between the first pressure plate (450) and the turntable (410), and the multi-stage lever (430) acts on the first pressure plate (450) to drive the friction plate (420) and the turntable (410) to move closer to each other.

4. The lamp with a lever-type locking assembly according to claim 3, characterized in that, The lever-type locking assembly (400) further includes a second pressure plate (460), which is slidably disposed on the guide post (451) of the first pressure plate (450) and the distance between the second pressure plate (460) and the first pressure plate (450) is adjusted by bolts (461). Another friction plate (420) is clamped between the second pressure plate (460) and the turntable (410).

5. The lamp with a lever-type locking assembly according to claim 1, characterized in that, The multi-stage lever (430) includes a first lever (431) and a second lever (432) that abut against each other or are hinged together. The free end of the first lever (431) acts on the friction plate (420), and the free end of the second lever (432) cooperates with the control lever (440). The control lever (440) pushes the free end of the second lever (432), thereby amplifying the power of the control lever (440) and pushing the friction plate (420) with the free end of the first lever (431).

6. The luminaire with a lever-type locking assembly according to claim 5, characterized in that, The two ends of the first lever (431) are located on both sides of the control lever (440).

7. The luminaire with a lever-type locking assembly according to claim 6, characterized in that, The first lever (431) has a strip-shaped hole (4311) along its length direction, and the second lever (432) passes through the strip-shaped hole (4311) and has its two ends located on both sides of the first lever (431).

8. The luminaire with a lever-type locking assembly according to claim 1 or 7, characterized in that, The turntable (410) is provided with a clearance hole (411) corresponding to the control lever (440), and the control lever (440) passes through the clearance hole (411).

9. The luminaire with a lever-type locking assembly according to claim 6, characterized in that, The lever-type locking assembly (400) further includes a first pressure plate (450) and a second pressure plate (460) slidably disposed on a guide post (451) of the first pressure plate (450). The turntable (410) is located between the first pressure plate (450) and the first pressure plate (450), and the friction plate (420) is clamped between the turntable (410) and the first pressure plate (450). The operating lever (440) applies a force away from the turntable (410) to the free end of the second lever (432). A second abutment plate (460) disposed on the second pressure plate (460) 62) The second lever (432) is supported at the connecting end near the turntable (410). The connecting end of the second lever (432) applies a force near the turntable (410) to the connecting end of the first lever (431). The first lever (431) has a supporting protrusion (4312) near its free end that supports the second pressure plate (460). The first supporting plate (452) disposed on the first pressure plate (450) supports the first lever (431) at the free end of the first lever (431) towards the turntable (410).

10. The luminaire with a lever-type locking assembly according to claim 9, characterized in that, The connecting post (463) on the second pressure plate (460) passes through the second lever (432) and is connected to the second abutment plate (462). The second lever (432) is provided with a movable hole (4321) corresponding to the connecting post (463).

11. The luminaire with a lever-type locking assembly according to claim 9, characterized in that, The control lever (440) includes a screw (441) and a threaded sleeve (442) threadedly connected to the screw (441). The threaded sleeve (442) is fitted into a through hole (464) on the second pressure plate (460), and the cross-section of the threaded sleeve (442) is not circular. The threaded sleeve (442) abuts against the free end of the second lever (432).

12. The luminaire with a lever-type locking assembly according to claim 11, characterized in that, The second lever (432) is provided with a through hole (4322) corresponding to the screw (441). After the screw (441) passes through the through hole (4322), it cooperates with the screw sleeve (442). The screw sleeve (442) is always located on the side of the second lever (432) away from the second abutment plate (462).

13. The luminaire with a lever-type locking assembly according to claim 4 or 9, characterized in that, The first pressure plate (450) or the second pressure plate (460) is fixed in position on the control lever (440).

14. The luminaire with a lever-type locking assembly according to claim 1, characterized in that, The multi-stage lever (430) amplifies the force applied to it by the control lever (440) by at least 10 times, the friction radius between the friction plate (420) and the turntable (410) is greater than 1 cm and / or the coefficient of friction between the friction plate (420) and the turntable (410) is greater than 0.

5.

15. The luminaire with a lever-type locking assembly according to claim 1, characterized in that, The pivot shaft (310) is fixed to the lamp head (100), the lever-type locking assembly (400) is fixed to the support base (200), and the turntable (410) rotates following the pivot shaft (310).

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