Lamp and rotation damping structure thereof

Abstract

The invention provides a rotation damping structure which is connected between a first base plate and a second base plate and provides relative rotation between the first base plate and the second base plate, the rotation damping structure comprises a rotating shaft, a shaft sleeve and a clamping piece which are sequentially arranged from inside to outside, and the rotating shaft comprises a coupling part and a connecting part which are sequentially arranged in the axial direction; the connecting part penetrates through the second base plate and is fixedly connected with the first base plate, the second base plate is fixedly connected with the shaft sleeve in the circumferential direction, the shaft sleeve is connected to the outer side of the coupling part in a sleeving mode, a movable gap is formed between the shaft sleeve and the coupling part, the first base plate is in linkage with the rotating shaft so that the coupling part can rotate along the inner edge of the shaft sleeve, and the shaft sleeve can elastically deform in the radial direction. And the clamping piece is clamped on the outer side of the shaft sleeve, so that the shaft sleeve forms damping force on the rotating shaft under the inward clamping force of the clamping piece. The invention further provides a lamp adopting the rotation damping structure. The structure is simple, installation is easy, the service life is long, and the installation cost is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of rotating connecting parts, and in particular to a rotating damping structure, and a lamp comprising the structure. Background Art

[0002] In order to meet the increasingly diverse lighting needs of homes and commercial places, especially to meet the needs of adjustable lighting range and angle, various lamps with rotating lamp heads have been widely used. Especially in the lighting market where LED lamps are becoming more and more popular, a large number of LED lamps with rotatable lamp heads have also emerged. Furthermore, shaft damping is widely used in lighting products to maintain the rotated state after the lamp head adjusts the angle. Generally, the damping structure uses elastic washers to fix the nuts, and then uses thread glue to stick the nuts to the bolts, and adjusts the shaft damping force by adjusting the elastic washers. However, the damping structure has the disadvantages of large loss, many parts, and complicated installation process, which increases the cost.

[0003] Therefore, those skilled in the art are committed to developing a rotation damping structure with a simple structure to provide convenience for installation and use and reduce costs. Summary of the invention

[0004] In view of the above-mentioned defects of the prior art, the technical problem to be solved by the present invention is the problem that the rotation damping structure in the traditional lamp is complex and costly.

[0005] To achieve the above-mentioned purpose, the present invention provides a rotational damping structure, which is connected between a first substrate and a second substrate, and includes a rotating shaft, a sleeve and a clamping member arranged in sequence from the inside to the outside. The rotating shaft includes an axial connection portion and a connecting portion arranged in sequence along the axial direction. The connecting portion passes through the second substrate and is fixedly connected to the first substrate. The second substrate and the sleeve are circumferentially fixedly connected. The sleeve is sleeved on the outer side of the axial connection portion. A movable gap is provided between the sleeve and the axial connection portion. The first substrate links the rotating shaft to make the axial connection portion rotate along the inner edge of the sleeve, thereby making the first substrate rotate relative to the second substrate. The sleeve is arranged to be able to elastically deform radially. The clamping member is clamped on the outer side of the sleeve, so that the sleeve forms a damping force on the rotating shaft under the inward clamping force of the clamping member.

[0006] Furthermore, a positioning block is formed circumferentially and outwardly on one end surface of the shaft sleeve facing the second substrate, and a positioning groove is correspondingly formed on the second substrate, and the positioning block is adaptively inserted into the positioning groove.

[0007] Preferably, the shaft sleeve is integrally formed of an elastic metal plate and includes an opening extending through both axial ends.

[0008] Furthermore, a first through hole is provided in the second substrate for the connecting part to pass through and rotate, the shaft connecting part is reduced in diameter toward the connecting part and a transition step is formed, and after the connecting part passes through the second substrate, the transition step is configured to be able to abut against the end face of the second substrate.

[0009] Further, an outer protrusion ring is formed radially outward at one end of the shaft connection portion away from the coupling portion, and the outer protrusion ring can abut against one end of the sleeve away from the second substrate.

[0010] Furthermore, the radial cross-section of the connecting part is non-circular, the first substrate is provided with a second through hole that matches the shape of the connecting part and allows the connecting part to pass through, and the end of the connecting part is provided with a fastener that fixes the connecting part and abuts against the outer end surface of the first substrate.

[0011] Furthermore, the connecting part is fixedly sleeved with a limit ring between the first substrate and the second substrate. The limit ring rotates synchronously with the connecting part and forms an inner groove. The second substrate is provided with a limit block protruding toward the limit ring. The limit block rotates with the second substrate and is restricted to move in the inner groove.

[0012] Preferably, a gasket is provided between the limiting ring and the second substrate.

[0013] Furthermore, the clamping member is an elastic sheet circumferentially wound around the shaft sleeve, and is configured to change the clamping force by closing or opening the free end of the elastic sheet, thereby causing the damping force of the shaft sleeve and the rotating shaft to change accordingly.

[0014] The present invention also provides a lamp, which includes the above-mentioned rotation damping structure, wherein the lamp housing includes or is fixedly connected to one of a first substrate and a second substrate, and the other of the first substrate and the second substrate is fixedly connected to a mounting surface, so that the lamp housing can rotate relative to the mounting surface, and an axially penetrating wire hole is provided in the rotating shaft for the wire to enter the housing to power the lamp.

[0015] The rotation damping structure of the present invention is simple in structure and easy to install. An elastic clamp is used at the rotating shaft to replace the elastic gasket, thereby avoiding material loss, reducing installation costs, and having the advantage of durability. The structure is suitable for rotational connection between a lamp and a mounting surface.

[0016] The concept, specific structure and technical effects of the present invention will be further described below in conjunction with the accompanying drawings to fully understand the purpose, characteristics and effects of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the rotation damping structure of the present invention.

[0018] Figure 2 It is a schematic diagram of the exploded structure of the rotation damping structure of the present invention.

[0019] Figure 3 It is a schematic cross-sectional structure diagram of the rotation damping structure of the present invention.

[0020] Figure 4 It is a structural schematic diagram of the shaft sleeve of the rotation damping structure of the present invention.

[0021] Figure 5 It is a schematic diagram of the connection structure between the rotating shaft of the rotation damping structure of the present invention and the second substrate.

[0022] Figure 6 It is a structural schematic diagram of the rotating shaft of the rotation damping structure of the present invention.

[0023] Figure 7 It is a structural schematic diagram of the clamping member of the rotation damping structure of the present invention.

[0024] Wherein: 1 first substrate, 11 second through hole, 2 second substrate, 21 first through hole, 22 positioning groove, 23 limiting protrusion, 3 rotating shaft, 31 shaft connection part, 311 transition step, 312 outer protruding ring, 32 connecting part, 321 embedded cylinder, 322 thread ring, 33 thread hole, 4 sleeve, 41 opening, 42 positioning block, 5 clamping member, 51 first end, 511 bayonet, 52 second end, 521 end, 6 fastener, 7 limiting ring, 71 inner groove, 8 washer, L center axis. DETAILED DESCRIPTION

[0025] like Figures 1 to 3 The figure shows an implementation scheme of a rotation damping structure provided by the present invention. The rotation damping structure is connected between the first substrate 1 and the second substrate 2, and provides relative rotation between the first substrate 1 and the second substrate 2, and mainly includes a rotating shaft 3, a sleeve 4 and a clamping member 5 arranged in sequence from the inside to the outside. Among them, the rotating shaft 3 includes a shaft connection portion 31 and a connecting portion 32 arranged in sequence along the axial direction, and the shaft connection portion 31 and the connecting portion 32 are two parts fixedly connected or are an integrally formed part. The connecting portion 32 passes through the second substrate 2 and is fixedly connected to the first substrate 1, so that the first substrate 1 and the connecting portion 32 can rotate synchronously after being fixedly connected. The second substrate 2 and the sleeve 4 are fixedly connected circumferentially, and after the connection, there is no relative rotation between the sleeve 4 and the second substrate 2. The sleeve 4 is sleeved on the outer side of the shaft connection part 31, and a movable gap is set between the sleeve 4 and the shaft connection part 31. The first substrate 1 links the rotating shaft 3 to make the shaft connection part 31 rotate along the inner edge of the sleeve 4. The sleeve 4 is configured to be able to radially elastically deform, and the clamping member 5 is clamped on the outer side of the sleeve 4, so that the sleeve 4 forms a damping force on the rotating shaft 3 under the inward clamping force of the clamping member 5.

[0026] In a specific embodiment of the present invention, the rotating shaft 3 rotates along its central axis L, and the outer wall of the shaft connection portion 31 can be set to be a cylindrical surface with the central axis L as the rotating shaft 3, and rotate in the movable gap in the sleeve 4. The sleeve 4 can be formed of an elastic metal plate in one piece. As an embodiment, it is formed by curling a strip of elastic metal plate. The two facing free ends of the curled metal plate are not connected, so that the outer wall of the sleeve 4 is not closed, forming an opening 41 that passes through both ends of the axial direction. In this way, when subjected to an inward clamping force, the sleeve 4 can be further deformed inward to increase the clamping force on the shaft connection portion 31.

[0027] The second substrate 2 is provided with a first through hole 21 for the connecting portion 32 to pass through and rotate. The shaft connecting portion 31 is reduced in diameter toward the connecting portion 32 and a transition step 311 is formed. After the connecting portion 32 passes through the second substrate 2, the transition step 311 is configured to be able to abut against the end surface of the second substrate 2. When the sleeve 4 is sleeved on the outside of the shaft connecting portion 31, one end thereof is limited by the second substrate 2. Further optionally, the end of the connecting portion 32 includes an embedded cylindrical surface 321 transitionally connected to the transition step 311. The embedded cylindrical surface 321 takes the central axis L as the rotation center, and is configured to be embedded in the first through hole 21 after the second substrate 2 is assembled, so as to provide the second substrate 2 with the ability to rotate along the axis.

[0028] A positioning block 42 is formed circumferentially and outwardly on one end surface of the sleeve 4 facing the second substrate 2. A positioning groove 22 is correspondingly formed on the second substrate 2. The positioning block 42 is adaptively inserted into the positioning groove 22. Figure 2 and Figure 4 As shown, two positioning blocks 42 are provided and are symmetrically arranged at the bottom end of the sleeve 4 along the central axis L. The first through hole 21 of the second substrate 2 expands outward to form two positioning grooves 22 corresponding to the positioning blocks 42. The bottom end of the sleeve 4 is vertically inserted into the positioning groove 22 through the positioning blocks 42 to achieve a fixed connection. When in use, the sleeve 4 cannot rotate axially relative to the second substrate 2, so that the damping force of the sleeve 4 on the rotating shaft 3 is maintained in a stable state.

[0029] Furthermore, an outer protruding ring 312 is formed radially outward at one end of the shaft connection portion 31 away from the connecting portion 32, which can abut against one end of the sleeve 4 away from the second substrate 2. When the sleeve 4 is sleeved on the outside of the shaft connection portion 31, its outer end is limited by the outer protruding ring 312. In this way, when the second substrate 2 abuts against the shaft connection portion 31, the sleeve 4 is limitedly installed on the outer wall of the shaft connection portion 31, and even if the sleeve 4 is axially displaced, the axial distance between the first substrate 1 and the second substrate 2 will not change. When only the rotation angle adjustment along the axis is performed, the stability of each installation base surface is guaranteed.

[0030] The end surface of the connecting portion 32 can be fixedly connected to the first substrate 1 by welding or tight fitting. Figure 5 and Figure 6 In the embodiment of the present invention, the radial cross section of the connecting portion 32 is non-circular, such as an elliptical, square, or waist-shaped shape formed by a combination of shapes. The first substrate 1 is provided with a second through hole 11 that matches the shape of the connecting portion 32 and allows the connecting portion 32 to pass through. After the connecting portion 32 passes through the first substrate 1, it cannot rotate relatively, but the connecting portion 32 is rotated by the first substrate 1. A fastener 6 is provided at the end of the connecting portion 32, and the fastener 6 is fixedly connected to the connecting portion 32 and abuts against the outer end surface of the first substrate 1, so as to make the connecting portion 32 and the first substrate 1 fit tightly.

[0031] In order to achieve the angle limit in the rotation adjustment, the limit ring 7 is fixedly sleeved between the connection part 32 and the second substrate 2. The limit ring 7 passes through the connection part 32 and its inner hole matches the cross-sectional shape of the connection part 32, so that the limit ring 7 rotates synchronously with the connection part 32, and the outer edge of the limit ring 7 is recessed inward to form an inner groove 71. The second substrate 2 is provided with a limit protrusion 23 protruding toward the limit ring 7. Since the limit ring 7 has a certain thickness, the limit protrusion 23 interferes with the limit ring 7. The limit protrusion 23 is limited to move in the inner groove 71 as the second substrate 2 rotates. The limit protrusion 23 can be blocked by the edge of the inner groove 71, thereby realizing rotation within the set angle range. For the rotation structure with internal threading, setting a rotation limit can avoid line winding damage caused by excessive rotation.

[0032] In a preferred embodiment, the end of the connection part 32 and the fastener 6 are threadedly connected, and a threaded ring 322 is provided at the end of the connection part 32. The fastener 6 can be selected as a thin nut. As the fastener 6 is tightened on the connection part 32, the fastener 6 pushes the first substrate 1 to move closer to the second substrate 2. When the assembly is completed, the sleeve 4, the second substrate 2, the limit ring 7 and the first substrate 1 are tightly matched and abutted in sequence to achieve a compact structure. Further, a washer 8 is provided between the limit ring 7 and the second substrate 2 to reduce the wear between the second substrate 2 and the second substrate 2 during the rotation process. The washer 8 is preferably made of nylon to improve the wear resistance.

[0033] Optionally, the clamping member 5 is an elastic sheet circumferentially wound around the sleeve 4, and is configured to change the clamping force by closing or opening the free end of the elastic sheet, so that the damping force of the sleeve 4 and the rotating shaft 3 changes accordingly. When adjusting the rotation damping, the tension of the clamping member 5 can be adjusted, or the clamping members 5 with different clamping forces can be replaced, both of which are convenient to operate. Figure 7 The clamping member 5 is processed and curled from an elastic sheet into a ring shape, including a first end 51 and a second end 52. The first end 51 is provided with a bayonet 511, and the end 521 of the second end 52 is bent and elastically abuts against the first end 51 after passing through the buckle.

[0034] Based on the above-mentioned rotation damping structure, the present invention further provides a lamp, wherein the lamp housing includes or is fixedly connected to one of the first substrate 1 and the second substrate 2, and the other of the first substrate 1 and the second substrate 2 is fixedly connected to the mounting surface, for example, the first substrate 1 is a part of the lamp housing, and the second substrate 2 is provided with a mounting hole for being fixedly mounted on the mounting surface of the ceiling or the cabinet by screws or the like. Through the above-mentioned rotation damping structure, the lamp housing can rotate relative to the mounting surface, and an axially penetrating wire hole 33 is provided in the rotating shaft 3 for the wire to enter the housing to power the lamp.

[0035] The preferred specific embodiments of the present invention are described in detail above. It should be understood that a person skilled in the art can make many modifications and changes based on the concept of the present invention without creative work. Therefore, any technical solution that can be obtained by a person skilled in the art through logical analysis, reasoning or limited experiments based on the concept of the present invention on the basis of the prior art should be within the scope of protection determined by the claims.

Claims

1. A rotation damping structure connected between a first substrate (1) and a second substrate (2), characterized in that: The invention comprises a rotating shaft (3), a sleeve (4) and a clamping member (5) which are arranged in sequence from the inside to the outside. The rotating shaft (3) comprises a shaft connection portion (31) and a connecting portion (32) which are arranged in sequence along the axial direction. The connecting portion (32) passes through the second substrate (2) and is fixedly connected to the first substrate (1). The second substrate (2) and the sleeve (4) are fixedly connected in the circumferential direction. The sleeve (4) is sleeved on the outer side of the shaft connection portion (31). A movable gap is provided between the sleeve (4) and the shaft connection portion (31). The first substrate (1) is linked with the rotating shaft (3) to make the shaft connection portion (31) rotate along the inner edge of the sleeve (4), thereby making the first substrate (1) rotate relative to the second substrate (2). The sleeve (4) is arranged to be able to elastically deform in the radial direction. The clamping member (5) is clamped on the outer side of the sleeve (4), thereby making the sleeve (4) form a damping force on the rotating shaft (3) under the inward clamping force of the clamping member (5).

2. The rotation damping structure according to claim 1, characterized in that: A positioning block (42) is formed circumferentially and outwardly on one end surface of the shaft sleeve (4) facing the second substrate (2); a positioning groove (22) is correspondingly provided on the second substrate (2); and the positioning block (42) is adaptively inserted into the positioning groove (22).

3. The rotation damping structure according to claim 1, characterized in that: The shaft sleeve (4) is formed in one piece from an elastic metal plate and comprises an opening (41) extending through both ends of the shaft sleeve.

4. The rotation damping structure according to claim 1, characterized in that: The second substrate (2) is provided with a first through hole (21) for the connecting portion (32) to pass through and rotate. The shaft connection portion (31) is reduced in diameter toward the connecting portion (32) and a transition step (311) is formed. After the connecting portion (32) passes through the second substrate (2), the transition step (311) is arranged to be able to abut against the end surface of the second substrate (2).

5. The rotation damping structure according to claim 1, characterized in that: An end of the shaft connection portion (31) away from the connecting portion (32) is radially outwardly formed with an outer protruding ring (312) which can abut against an end of the shaft sleeve (4) away from the second substrate (2).

6. The rotation damping structure according to claim 1, characterized in that: The radial cross section of the connecting portion (32) is non-circular, the first substrate (1) is provided with a second through hole (11) which matches the shape of the connecting portion (32) and is for the connecting portion (32) to pass through, and a fastener (6) is provided at the end of the connecting portion (32), the fastener (6) is fixedly connected to the connecting portion (32) and abuts against the outer end surface of the first substrate (1).

7. The rotation damping structure according to claim 1, characterized in that: The connecting portion (32) is fixedly sleeved with a limiting ring (7) between the first substrate (1) and the second substrate (2); the limiting ring (7) rotates synchronously with the connecting portion (32) and is provided with an inner groove (71); the second substrate (2) is provided with a limiting protrusion (23) protruding toward the limiting ring (7); the limiting protrusion (23) rotates with the second substrate (2) and is limited to move in the inner groove (71).

8. The rotation damping structure according to claim 7, characterized in that: A gasket (8) is provided between the limiting ring (7) and the second substrate (2).

9. The rotation damping structure according to claim 1, characterized in that: The clamping member (5) is an elastic sheet circumferentially wound around the shaft sleeve (4), and is configured to change the clamping force by closing or opening the free end of the elastic sheet, thereby causing the damping force of the shaft sleeve (4) and the rotating shaft (3) to change accordingly.

10. A lamp, comprising the rotation damping structure according to any one of claims 1 to 9, characterized in that: The lamp housing comprises or is fixedly connected to one of a first substrate (1) and a second substrate (2); the other of the first substrate (1) and the second substrate (2) is fixedly connected to a mounting surface so that the lamp housing can rotate relative to the mounting surface; and a wire hole (33) extending axially through the rotating shaft (3) is provided for a wire to enter the housing to supply power to the lamp.

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