A focusing device for stage lights

Abstract

This invention relates to a focusing device for a stage light, comprising a guide rail and a slider that can slide relative to the length of the guide rail. The slider is used to connect with a lens assembly to adjust the focal length. The guide rail is provided with a first flange protruding outwards on both sides. The slider is provided with a receiving cavity with an opening. The two opposite inner sides of the receiving cavity are provided with grooves corresponding to the first flanges, and the grooves completely penetrate the upper and lower ends of the slider. An intermediate block is fixedly provided in each of the two grooves. The intermediate block is provided with a sliding groove adapted to the first flange, and the sliding groove completely penetrates the upper and lower ends of the intermediate block. This allows the slider to slide and engage with the first flange of the guide rail through the sliding groove of the intermediate block. The intermediate block not only improves the fit and smoothness between the slider and the guide rail, but also prevents wear caused by direct contact between the slider and the guide rail, thereby extending the service life of the focusing device.

Description

Technical Field

[0001] This invention relates to the field of lighting technology, and more particularly to a focusing device for a stage lamp. Background Technology

[0002] There are two existing focusing structures for stage lights:

[0003] 1. In stage lighting fixtures, the focusing mechanism's guide rail typically uses a circular guide rod in conjunction with a circular linear sliding bearing. In applications requiring high-precision coaxial motion, various uncertainties such as eccentricity and clearance errors can easily cause the sliding components to oscillate.

[0004] 2. In stage lighting fixtures, the focusing structure uses a combination of a square guide rod and a slider. The slider has a groove that matches the square guide rod, and the groove is also equipped with a steel ball to increase the smoothness of sliding between the slider and the square guide rod. Although the addition of the steel ball can improve the smoothness to a certain extent, it is easy for the steel ball to fall off during long-term sliding wear, resulting in the failure of the focusing structure.

[0005] Therefore, there is an urgent need to develop a focusing structure that has high precision, smooth sliding without jamming, and long service life. Summary of the Invention

[0006] To solve one of the above-mentioned technical problems, this invention provides a focusing device for stage lights that has high matching accuracy, smooth sliding, and long service life.

[0007] To solve the above-mentioned technical problems, the present invention provides the following technical solution:

[0008] A focusing device for a stage light includes a guide rail and a slider that can slide relative to the length of the guide rail. The slider is used to connect with a lens assembly to adjust the focal length. The guide rail has a first flange protruding outwards on both sides. The slider has an open receiving cavity. The two opposite inner sides of the receiving cavity have grooves corresponding to the first flanges, and the grooves completely penetrate the upper and lower ends of the slider. An intermediate block is fixedly disposed in each of the two grooves. The intermediate block has a sliding groove adapted to the first flange, and the sliding groove completely penetrates the upper and lower ends of the intermediate block, so that the slider slides through the sliding groove of the intermediate block and the first flange of the guide rail.

[0009] Further defined, the guide rail includes a guide rail body for fixed connection of stage lights, a portion of the guide rail body passes through the opening of the receiving cavity, the first flange is provided on both sides of one end of the guide rail, and the second flange protruding outwards is provided on both sides of the other end, so that the cross-section of the guide rail forms an "I" shaped structure.

[0010] Further defined, the cross-section of the intermediate block is arc-shaped, giving it an arc-shaped face and a flat face. The arc-shaped face is adapted to fit the concave surface of the groove, while the flat face is provided with the sliding groove.

[0011] It is further defined that the arc-shaped cross-section of the intermediate block is greater than 1 / 2 of a circle.

[0012] Further defined, the groove is rectangular and the first flange is also rectangular, so that the groove and the first flange slide together.

[0013] Further specified, the guide rail and slider are made of metal, and the middle block is made of plastic.

[0014] Further specified, a lubricant is added between the slider and the groove.

[0015] It is further specified that it also includes a drive mechanism for driving the slider to slide.

[0016] Further defined, the groove of the slider and the middle block are fixedly connected by protrusions and slots.

[0017] Further specified, the groove of the slider and the intermediate block are fixedly connected by adhesive.

[0018] By adopting the above technical solution, the present invention has at least the following beneficial effects:

[0019] 1. The intermediate block is fixedly assembled in the groove and moves up and down along the length of the first flange of the guide rail as the slider moves, thereby achieving the focusing effect. The intermediate block not only improves the fit and smoothness between the slider and the guide rail, but also prevents wear caused by direct contact between the slider and the guide rail, thus extending the service life of the focusing device.

[0020] 2. The guide rail and slider are made of metal, and the middle block is made of plastic. The specific advantages are as follows: (1) Plastic material can reduce the direct contact between metal parts, thereby reducing friction and making the movement smoother; (2) Plastic material usually has self-lubricating properties, which can provide lubrication during the movement, reducing wear and noise; (3) Plastic parts have good wear resistance, which can protect metal parts from wear during long-term use and extend the service life of the equipment; (4) Plastic parts can absorb impact and vibration, protecting metal parts from damage, especially under high-speed movement or heavy load, which can effectively reduce the damage to metal parts. Attached Figure Description

[0021] Figure 1 This is a structural diagram of the focusing device.

[0022] Figure 2This is one of the exploded views of the focusing device;

[0023] Figure 3 This is the second exploded view of the focusing device;

[0024] Figure 4 This is a cross-sectional view of the focusing device. Detailed Implementation

[0025] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0026] In the description of this invention, it should be understood that the terms "center," "middle," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential" indicating orientation or positional relationships are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0027] As attached Figure 1 Appendix Figure 4 As shown, a focusing device for a stage light includes a guide rail 1 and a slider 2 that can slide relative to the length (vertical direction) of the guide rail 1. The slider 2 is used to connect with a lens assembly 3 to adjust the focal length. The guide rail 1 is provided with a first flange 11 protruding outwards and extending along the length of the guide rail 1. The slider 2 is provided with a receiving cavity 20 having an opening 201. The two opposite inner sides of the receiving cavity 20 are provided with grooves 21 corresponding to the first flange 11, and the grooves 21 completely penetrate the upper and lower ends of the slider 2. An intermediate block 4 is fixedly provided in each of the two grooves 21. The intermediate block 4 is provided with a sliding groove 41 adapted to the first flange 11, and the sliding groove 41 completely penetrates the upper and lower ends of the intermediate block 4, so that the slider 2 slides and engages with the first flange 11 of the guide rail 1 through the sliding groove 41 of the intermediate block 4. The intermediate block 4 is fixedly assembled in the groove 21 and moves up and down with the slider 2 along the length of the first flange 11 of the guide rail 1, thereby achieving the focusing effect. The intermediate block 4 not only improves the fit and smoothness between the slider 2 and the guide rail 1, but also prevents wear caused by direct contact between the slider 2 and the guide rail 1, thereby extending the service life of the focusing device.

[0028] As attached Figure 2As shown, the guide rail 1 includes a guide rail body 10 for fixed connection to the stage lamp. Part of the guide rail body 10 passes through the opening 201 of the receiving cavity 20. The guide rail 1 has a first flange 11 on both sides (both sides in the front-back direction) at one end (left end), and a second flange 12 protruding outward on both sides (both sides in the front-back direction) at the other end (right end), so that the cross-section of the guide rail 1 forms an "I" shaped structure, thereby enhancing the rigidity of the guide rail 1. In addition, when fixed, the guide rail 1 abuts against the side of the stage lamp through the second flange 12, thereby increasing the contact area between the guide rail 1 and the stage lamp and enhancing the stability of the guide rail 1 fixed to the stage lamp.

[0029] As attached Figure 3 As shown, the cross-section of the intermediate block 4 is arc-shaped, giving it an arc-shaped face 42 and a flat face 43. The arc-shaped face 42 fits and conforms to the concave surface of the groove 21, increasing the tightness of the fit between the intermediate block 4 and the groove 21. The flat face 43 is provided with the sliding groove 41. The edge of the opening 201 of the sliding groove 41 in the radial direction is flush with the edge of the opening 201 of the groove 21 in the radial direction, which facilitates the positioning and insertion of the intermediate block 4.

[0030] As attached Figure 4 As shown, the arc-shaped cross-section of the intermediate block 4 is greater than half a circle, making the maximum width of the intermediate block 4 in the radial direction as large as possible. This ensures that the groove 41 has sufficient depth when set in the intermediate block 4, thereby increasing the contact area between the groove 41 and the first flange 11 and improving the sliding stability of the slider 2. The groove 41 is rectangular, and the first flange 11 is also rectangular, allowing the groove 41 and the first flange 11 to slide together.

[0031] In this embodiment, the guide rail 1 and slider 2 are made of metal, while the intermediate block 4 is made of plastic. The specific advantages are as follows: 1. Plastic materials reduce direct contact between metal parts, thereby reducing friction and making movement smoother. 2. Plastic materials typically have self-lubricating properties, providing lubrication during movement and reducing wear and noise. 3. Plastic parts have good wear resistance, protecting metal parts from wear during prolonged use and extending the equipment's lifespan. 4. Plastic parts can absorb impacts and vibrations, protecting metal parts from damage, especially under high-speed movement or heavy load conditions, effectively reducing damage to metal parts.

[0032] Of course, we can also choose to add lubricant between the slider 2 and the groove 41 to further improve the smoothness of the focusing device.

[0033] As attached Figure 1As shown, the focusing device also includes a drive mechanism for driving the slider 2 to slide. Specifically, the drive mechanism includes a motor, a synchronous belt and a transmission wheel. The motor rotates synchronously with the transmission wheel through the synchronous belt, and the synchronous belt is linked with the slider to realize the automatic sliding of the slider.

[0034] The intermediate block 4 is fixed in two ways: First, the groove 21 of the slider 2 and the intermediate block 4 are fixedly connected by protrusions and slots (not shown). Specifically, the groove 21 has several protrusions or slots, and the outer circumferential surface of the intermediate block 4 has slots or protrusions corresponding to these protrusions or slots. When the intermediate block 4 is assembled into the groove 21, the protrusions and slots engage one-to-one, thus completing the fixed assembly of the intermediate block 4. Second, the groove 21 of the slider 2 and the intermediate block 4 are fixedly connected by adhesive. Adhesive is first applied to the groove 21 of the slider 2 and / or the contact surface between the intermediate block 4 and the groove 21. After the intermediate block 4 and the groove 21 are fitted together, the bonding is complete.

[0035] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various equivalent changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A focusing device for a stage lamp, comprising a guide rail (1) and a slider (2) slidable relative to the length of the guide rail (1), the slider (2) being connected to a lens assembly (3) to adjust the focal length, the guide rail (1) having a first flange (11) protruding outwards on both sides, the slider (2) having a receiving cavity (20) with an opening (201), the receiving cavity (20) having grooves (21) corresponding to the first flange (11) on both opposite inner sides, and the grooves (21) completely penetrating the upper and lower ends of the slider (2), characterized in that, A middle block (4) is fixedly provided in the groove (21) on both sides. The middle block (4) has a sliding groove (41) that matches the first flange (11). The sliding groove (41) completely passes through the upper and lower ends of the middle block (4), so that the slider (2) slides through the sliding groove (41) of the middle block (4) and the first flange (11) of the guide rail (1).

2. The focusing device according to claim 1, characterized in that, The guide rail (1) includes a guide rail body (10) for fixed connection of stage lights. Part of the guide rail body (10) passes through the opening (201) of the receiving cavity (20). The guide rail (1) has a first flange (11) on both sides of one end and a second flange (12) protruding outward on both sides of the other end, so that the cross section of the guide rail (1) forms an "I" shaped structure.

3. The focusing device according to claim 1, characterized in that, The cross section of the intermediate block (4) is arc-shaped, giving it an arc-shaped face (42) and a flat face (43). The arc-shaped face (42) is adapted to fit the concave surface of the groove (21), while the flat face (43) is provided with the groove (41).

4. The focusing device according to claim 3, characterized in that, The arc-shaped cross section of the intermediate block (4) is greater than 1 / 2 circle.

5. The focusing device according to claim 3, characterized in that, The groove (41) is rectangular and the first flange (11) is also rectangular, so that the groove (41) and the first flange (11) slide together.

6. The focusing device according to claim 1, characterized in that, The guide rail (1) and slider (2) are made of metal, and the middle block (4) is made of plastic.

7. The focusing device according to claim 1, characterized in that, Lubricant is added between the slider (2) and the groove (41).

8. The focusing device according to claim 1, characterized in that, It also includes a drive mechanism for driving the slider (2) to slide.

9. The focusing device according to any one of claims 1 to 8, characterized in that, The groove (21) of the slider (2) is fixedly connected to the middle block (4) by means of protrusions and slots.

10. The focusing device according to any one of claims 1 to 8, characterized in that, The groove (21) of the slider (2) is fixedly connected to the middle block (4) by adhesive.

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