Manual focusing device of stage lamp

Abstract

The utility model relates to a manual focusing device of a stage lamp, which comprises a bracket, a sliding rod is vertically and fixedly arranged on the bracket, a guide sleeve is slidably sleeved on the sliding rod, the guide sleeve is fixedly connected with a lens assembly, a sliding hole extending along the vertical direction is formed in the bracket, and a driving rod fixedly connected with the guide sleeve is arranged in the sliding hole in a penetrating manner. The driving rod vertically slides in the length direction of the sliding hole to drive the guide sleeve to slide on the sliding rod so as to be in linkage with the lens assembly, and the driving rod is provided with a locking mechanism for limiting sliding of the driving rod in the sliding hole. And in addition, the production cost can be reduced.

Description

Technical Field

[0001] The invention relates to the technical field of stage lamp lighting, and in particular to a manual focusing device for a stage lamp. Background Art

[0002] In the field of stage lighting technology, in order to make the lighting effects of stage lights more diverse, optical magnification and focusing devices are usually installed in stage lights. The general automatic focusing method is to drive the transmission belt through a motor to link the lens assembly up and down; the automatic adjustment method has the following defects: 1. System error: The automatic focusing system needs to be adjusted in real time according to the specific situation of the stage lighting, but due to changes in factors such as lighting arrangement, intensity and color, the calculated optimal focus position may deviate; 2. High cost: Automatic focusing technology usually requires the integration of a series of sensors, processors and software modules. The cost of these devices in the design and production process is high, resulting in a relatively expensive overall equipment price. Summary of the invention

[0003] The present invention is to solve one of the above technical problems and provide a manual focusing device for a stage light, which can be adjusted manually to reduce the influence of external factors, adjust the optimal focus position, and reduce production costs.

[0004] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0005] A manual focusing device for a stage lamp comprises a bracket, a sliding rod is vertically fixedly arranged on the bracket, a guide sleeve is slidably sleeved on the sliding rod, a lens assembly is fixedly connected to the guide sleeve, a sliding hole extending along the vertical direction is opened on the bracket, a driving rod fixedly connected to the guide sleeve is passed through the sliding hole, the driving rod slides vertically along the length direction of the sliding hole to drive the guide sleeve to slide on the sliding rod, and then links the lens assembly, and a locking mechanism is arranged on the driving rod to limit its sliding in the sliding hole.

[0006] As a preferred embodiment, it is further defined that the locking mechanism includes a fastener fixedly arranged on the guide sleeve and a first limiter fixedly arranged on the driving rod, and the driving rod is threadedly connected with the fastener after passing through the sliding hole, and when the thread is locked, the first limiter is tightly pressed against the edge of the sliding hole of the bracket.

[0007] As a preferred embodiment, it is further defined that the locking mechanism includes a first washer penetrating the driving rod, and the first limiting member is tightly abutted against the edge of the sliding hole of the bracket through the first washer.

[0008] As a preferred embodiment, it is further defined that the guide sleeve is provided with an embedding groove adapted to the fastener.

[0009] As a preferred embodiment, it is further defined that the fastener is a hexagonal nut.

[0010] As a preferred embodiment, it is further defined that the embedding groove is circular, and six protrusions evenly distributed around the center are arranged on the inner side surface of the embedding groove, and the embedding groove is tightly matched with the fastener through the protrusions.

[0011] As a preferred embodiment, it is further defined that the length of the protrusion in the depth direction of the embedding groove is smaller than the depth of the embedding groove so as to form an annular step, and the driving rod is penetrated by a second washer matched with the annular step.

[0012] As a preferred embodiment, it is further defined that the locking mechanism includes a second limit member, and the driving rod passes through the first limit member, the first washer, the sliding hole, the second washer, the fastener, and the guide sleeve in sequence and is fixedly connected to the second limit member.

[0013] As a preferred embodiment, it is further defined that both the first limiting member and the second limiting member are retaining springs.

[0014] As a preferred embodiment, it is further defined that a driving handle is provided at the end of the driving rod.

[0015] After adopting the above technical scheme, the invention has at least the following beneficial effects: the focusing device created by the invention can be adjusted manually, is not affected by external factors, and can adjust the focal length according to its own needs, and can also reduce production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a structural diagram of a focusing device;

[0017] Figure 2 It is an exploded view of the focusing device;

[0018] Figure 3 is a cross-sectional view of the focusing device;

[0019] Figure 4 It is a structural diagram of the guide sleeve. DETAILED DESCRIPTION

[0020] It should be noted that, in the absence of conflict, the embodiments in the present application and the features described in the embodiments may be combined with each other. The present application is further described in detail below in conjunction with the drawings and specific embodiments.

[0021] As attached Figure 1 To Attachment Figure 4As shown, a manual focusing device for a stage light comprises a bracket 1, a sliding rod 2 is vertically fixedly arranged on the bracket 1, a guide sleeve 3 is slidably sleeved on the sliding rod 2, a lens assembly 100 is fixedly connected to the guide sleeve 3, a sliding hole 10 extending along the vertical direction is opened on the bracket 1, a driving rod 4 fixedly connected to the guide sleeve 3 is penetrated in the sliding hole 10, the driving rod 4 slides vertically along the length direction of the sliding hole 10 to drive the guide sleeve 3 to slide on the sliding rod 2, and then links the lens assembly 100, and a locking mechanism 5 is provided on the driving rod 4 to limit its sliding in the sliding hole 10.

[0022] In this embodiment, the locking mechanism 5 includes a fastener 51 fixedly arranged on the guide sleeve 3 and a first stopper 53 fixedly arranged on the driving rod 4. The driving rod 4 is threadedly connected with the fastener 51 after passing through the sliding hole 10. When the thread is locked, the first stopper 53 is tightly pressed against the edge of the sliding hole 10 of the bracket 1. Specifically, since the fastener 51 is threadedly connected with the driving rod 4, the driving rod 4 is operated to rotate in the direction of tightening the thread. At this time, the driving rod 4 moves to the left and drives the first stopper 53 to squeeze the edge of the sliding hole 10. Under the action of the squeezing force, the movement of the driving rod 4 can be limited, thereby completing the locking of the driving rod 4 and synchronously locking the focal length of the lens assembly 100; if the driving rod 4 is operated to rotate in the direction of loosening the thread, the driving rod 4 moves to the right. The first stopper 53 and the edge of the sliding hole 10 lose the squeezing force, and the driving rod 4 can move up and down along the length direction of the sliding hole 10, thereby driving the lens assembly 100 to adjust the focal length.

[0023] Therefore, the focusing device created by the present invention can be adjusted manually, which can reduce the focusing error caused by external factors, adjust the focal length according to its own needs, and also reduce the production cost.

[0024] Specifically, the locking mechanism 5 includes a first washer 52 passed through the driving rod 4, and the first limiting member 53 is tightly pressed against the edge of the sliding hole 10 of the bracket 1 through the first washer 52. Preferably, the maximum diameter of the first washer 52 is greater than the width of the sliding hole 10. The first washer 52 can increase the contact area between the first limiting member 53 and the edge of the sliding hole 10, effectively reducing vibration, impact and noise, thereby improving the operating efficiency and reliability of the structure.

[0025] Specifically, the guide sleeve 3 is provided with an inlay groove 31 adapted to the fastener 51 , and the fastener 51 is a hexagonal nut, which facilitates the assembly of the fastener 51 .

[0026] As attached Figure 4As shown, the embedding groove 31 is circular, and six protrusions 311 evenly distributed around the center are provided on the inner side surface of the embedding groove 31. The embedding groove 31 is tightly matched with the fastener 51 through the protrusions 311, preferably with an interference fit. Furthermore, the six protrusions 311 are respectively abutted against the hexagonal circumference of the hexagonal nut in a one-to-one correspondence, which can effectively reduce the edge wear of the fastener 51 and the embedding groove 31, and reduce the risk of loosening of the fastener 51.

[0027] As attached Figure 4 As shown, the length of the protrusion 311 in the depth direction of the embedding groove 31 is smaller than the depth of the embedding groove 31 so that an annular step 312 is formed, and the driving rod 4 is penetrated by a second washer 55 adapted to the annular step 312. Preferably, the second washer 55 is interference fit with the annular step 312, and the second washer 55 covers the opening of the embedding groove 31 to prevent the fastener 51 from falling out in the axial direction.

[0028] As attached Figure 2 As shown, the locking mechanism 5 includes a second limit member 54. The driving rod 4 passes through the first limit member 53, the first washer 52, the sliding hole 10, the second washer 55, the fastener 51, and the guide sleeve 3 in sequence and is fixedly connected to the second limit member 54. The second limit member 54 limits the moving distance of the driving rod 4 in the direction of loosening the thread to prevent the driving rod 4 from falling out.

[0029] Specifically, the first limiting member 53 and the second limiting member 54 are both retaining springs. Preferably, the circumferential surfaces of the first limiting member 53 and the second limiting member 54 are both provided with retaining grooves, in which the retaining springs are retained to limit the driving rod 4 .

[0030] Specifically, a driving handle 41 is provided at the end of the driving rod 4 to facilitate the operator to operate the driving rod 4 to move.

[0031] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various equivalent changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A manual focusing device for a stage light, comprising a bracket (1), wherein the bracket (1) is vertically fixedly provided with a slide bar (2), a guide sleeve (3) is slidably sleeved on the slide bar (2), and a lens assembly (100) is fixedly connected to the guide sleeve (3), characterized in that: The bracket (1) is provided with a sliding hole (10) extending in a vertical direction, and a driving rod (4) fixedly connected to the guide sleeve (3) is passed through the sliding hole (10). The driving rod (4) slides vertically along the length direction of the sliding hole (10) to drive the guide sleeve (3) to slide on the sliding rod (2), thereby linking the lens assembly (100). The driving rod (4) is provided with a locking mechanism (5) for limiting its sliding in the sliding hole (10).

2. The focusing device according to claim 1, characterized in that: The locking mechanism (5) comprises a fastener (51) fixedly arranged on the guide sleeve (3) and a first stopper (53) fixedly arranged on the drive rod (4); the drive rod (4) is threadedly connected to the fastener (51) after passing through the slide hole (10); when the thread is locked, the first stopper (53) is tightly abutted against the edge of the slide hole (10) of the bracket (1).

3. The focusing device according to claim 2, characterized in that: The locking mechanism (5) comprises a first washer (52) which is passed through the driving rod (4), and the first limiting member (53) is tightly abutted against the edge of the sliding hole (10) of the bracket (1) via the first washer (52).

4. The focusing device according to claim 2, characterized in that: The guide sleeve (3) is provided with an embedding groove (31) adapted to the fastener (51).

5. The focusing device according to claim 4, characterized in that: The fastener (51) is a hexagonal nut.

6. The focusing device according to claim 5, characterized in that: The embedding groove (31) is circular in shape, and six protrusions (311) evenly distributed around the center of the embedding groove (31) are arranged on the inner side surface of the embedding groove (31), and the embedding groove (31) is tightly matched with the fastener (51) through the protrusions (311).

7. The focusing device according to claim 6, characterized in that: The length of the protrusion (311) in the depth direction of the embedding groove (31) is smaller than the depth of the embedding groove (31) so as to form an annular step (312), and the driving rod (4) is provided with a second washer (55) adapted to the annular step (312).

8. The focusing device according to claim 7, characterized in that: The locking mechanism (5) comprises a second position-limiting member (54), and the driving rod (4) sequentially passes through the first position-limiting member (53), the first washer (52), the sliding hole (10), the second washer (55), the fastener (51), and the guide sleeve (3) and is fixedly connected to the second position-limiting member (54).

9. The focusing device according to claim 2 or 7, characterized in that: The first limiting member (53) and the second limiting member (54) are both retaining springs.

10. The focusing device according to any one of claims 1 to 8, characterized in that: A driving handle (41) is provided at the end of the driving rod (4).

Images