Angle adjustment limiting device and lighting equipment

Abstract

The invention relates to an angle adjusting and limiting device and lighting equipment, the angle adjusting and limiting device comprises a support, a transmission assembly, a rotary knob, an elastic piece, a threaded shaft, a first clamping piece, a second clamping piece and a mounting piece, and the first clamping piece and the second clamping piece are buckled in the direction of a rotating shaft so that the first clamping piece and the second clamping piece can be limited in the direction around the rotating shaft; an angle adjustment limiting device second clamping piece is fixed at one end of the angle adjustment limiting device transmission assembly in the angle adjustment limiting device rotating shaft direction, and the other end of the angle adjustment limiting device transmission assembly abuts against an angle adjustment limiting device knob; the angle adjusting and limiting device elastic piece provides elastic force for the angle adjusting and limiting device transmission assembly to move towards one side of the angle adjusting and limiting device knob so as to drive the angle adjusting and limiting device second clamping piece to move in the direction of the angle adjusting and limiting device rotating shaft to be separated from the angle adjusting and limiting device first clamping piece. And a user can adjust the angle in a labor-saving manner, and the lamp body with the adjusted angle can be stably fixed at a specified angle.

Description

Technical Field

[0001] The present invention relates to the technical field of lighting lamps, and in particular to an angle adjustment limiting device and lighting equipment. Background Art

[0002] The lamp body bracket is an important part of the lamp, which is mainly used to support and fix the various parts of the lamp to ensure the stability and safety of the lamp. The lamp body bracket is usually made of metal materials, such as copper, iron, aluminum or ceramic, which have good conductivity and mechanical strength. Some lamp body brackets can rotate, and are devices that allow the lamp to rotate freely in a specific direction while supporting and fixing the lamp. The existing lamp body bracket usually adopts the side clamping method, which has the disadvantages of limited clamping force and limited load-bearing torque strength. Another method is the shrinkage and tightening method, which has the disadvantages of changing the distance between the brackets on both sides, which can easily cause the lamp body to be unstable during assembly, and easily cause wear to the lamp body bracket, affecting the assembly effect. Therefore, how to fix the lamp body with the adjusted angle at a specified angle under the clamping action of the lamp body bracket is a technical problem that needs to be solved urgently by technicians in this field. Summary of the invention

[0003] Based on this, the present application provides an angle adjustment limit device, which saves users effort during the angle adjustment process and can stably fix the lamp body with the adjusted angle at a specified angle, thereby improving the use effect.

[0004] An angle adjustment limit device comprises a bracket, a transmission assembly, a knob, an elastic member, a threaded shaft, a first clamping member, a second clamping member and a mounting member; the threaded shaft is fixed to the bracket, one end of the threaded shaft having a threaded structure extends out of the bracket, and the knob is threadedly connected with the threaded structure; the first clamping member is fixedly connected with the mounting member, and the first clamping member is rotatably connected with the bracket and / or the threaded shaft, the first clamping member and the second clamping member are buckled in a direction along the rotation axis so that the two are limited in a direction around the rotation axis, and the rotation axis direction is parallel to the length direction of the threaded shaft;

[0005] The transmission component is slidably connected to the bracket along the rotation axis direction, and an elastic member is connected between the transmission component and the bracket. The second engaging member is fixed to one end of the transmission component along the rotation axis direction, and the other end is abutted against the knob. The elastic member provides an elastic force to the transmission component to move toward one side of the knob, so as to drive the second engaging member to move along the rotation axis direction to separate from the first engaging member.

[0006] In the above angle adjustment limiting device, a second engaging member is fixed at one end of the transmission assembly along the rotation axis direction, and the second engaging member can move along the rotation axis direction under the drive of the transmission assembly. Since the first engaging member is fixed to the mounting member, when the second engaging member moves along the rotation axis direction to the side away from the first engaging member, the toothed structures of the first engaging member and the second engaging member are separated to release the limiting relationship between the first engaging member and the second engaging member. The positional relationship between the first engaging member and the second engaging member can be adjusted by rotating the knob. When the first engaging member and the second engaging member are engaged through the toothed structure, the two can be limited in the direction around the rotation axis. Compared with the structure of tightening the screw nut by force in the prior art to achieve limiting, this embodiment is more labor-saving and has a better limiting effect. It can make the lamp body with adjusted angle stably fixed at a specified angle, thereby improving the use effect.

[0007] In one embodiment, a toothed structure is provided on a side of the first engaging member facing the second engaging member, and a toothed structure is provided on a side of the second engaging member facing the first engaging member. The first engaging member and the second engaging member are engaged with each other through the toothed structure to achieve positioning around the rotation axis.

[0008] In one embodiment, the first engaging member and the second engaging member are sleeved on the threaded shaft.

[0009] In one embodiment, a side of the first engaging member close to the knob abuts against the bracket, and the second engaging member is sleeved on the first engaging member. There is a movement gap between a side of the second engaging member close to the knob and the bracket.

[0010] In one of the embodiments, a sleeve is provided in the first engaging member, the threaded shaft is sleeved on the inner wall of the sleeve, the second engaging member is sleeved on the outer wall of the sleeve, the sleeve partially extends into the mounting member, the threaded shaft passes through the mounting member and a nut is provided at one end close to the mounting member, and the nut abuts against the sleeve and the mounting member in the direction of the rotating shaft.

[0011] In one embodiment, the transmission assembly includes a transmission base and a transmission rod that are fixedly connected to each other, the transmission base is slidably connected to the bracket along the rotation axis direction and abuts against the knob, one end of the transmission rod is connected to the transmission base, and the other end is connected to the second clamping member, the second clamping member is located between the transmission rod and the first clamping member, and the elastic member is connected between the transmission base and the bracket.

[0012] In one embodiment, the elastic member includes a compression spring, which is sleeved on the transmission rod, and one end of the compression spring close to the second engaging member abuts against the bracket, and the other end of the compression spring abuts against the transmission base.

[0013] In one of the embodiments, a guide groove extending along the direction of the rotating shaft is provided in the bracket, and the transmission rod is slidably connected in the guide groove.

[0014] In one of the embodiments, a nut is fixed to one end of the threaded shaft having a threaded structure, the threaded shaft is fixed to the bracket through the nut, and the nut is located between the knob and the bracket.

[0015] A lighting device comprises a lamp body and the above-mentioned angle adjustment and limiting device, wherein the lamp body is mounted on the mounting member. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0017] Figure 1 This is a schematic structural diagram of an angle adjustment limit device according to an embodiment;

[0018] Figure 2 A cross-sectional view of an angle adjustment limit device according to an embodiment;

[0019] Figure 3 for Figure 2 Enlarged view of the dotted line portion;

[0020] Figure 4 It is a schematic structural diagram of a first engaging member and a second engaging member of an angle adjustment and limiting device according to an embodiment;

[0021] Figure 5 The figure is a schematic diagram of the structure of a transmission assembly of an angle adjustment limit device according to an embodiment.

[0022] Reference numerals: angle adjustment limit device 10; bracket 20; guide groove 21; transmission assembly 30; transmission base 31; transmission rod 32; knob 41; elastic member 42; threaded shaft 43; nut 431; first engaging member 44; sleeve 441; second engaging member 45; toothed structure 46; mounting member 50; nut 51; lamp body 60; rotation axis direction P1 DETAILED DESCRIPTION

[0023] This section will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present invention, but it cannot be understood as a limitation on the scope of protection of the present invention.

[0024] In the description of the present invention, the meaning of "above", "below", "exceed", etc. is not inclusive of the number itself, and the meaning of "above", "below", "within", etc. is inclusive of the number itself. If there is a description of "first" or "second", it is only used to distinguish the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0025] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0026] In the present invention, unless otherwise clearly defined, the words "set", "install", "connect" and the like should be understood in a broad sense, for example, they can be directly connected or indirectly connected through an intermediate medium; they can be fixedly connected or detachably connected or integrally formed; they can be mechanically connected; they can be the internal connection of two elements or the interaction relationship between two elements. Those skilled in the art can reasonably determine the specific meanings of the above words in the present invention in combination with the specific content of the technical solution.

[0027] The lamp bracket is an important part of the lamp, which is mainly used to support and fix the various parts of the lamp to ensure the stability and safety of the lamp. The lamp bracket is usually made of metal materials, such as copper, iron, aluminum or ceramic, which have good conductivity and mechanical strength. Some lamp brackets can rotate, and are devices that allow the lamp to rotate freely in a specific direction while supporting and fixing the lamp. The existing lamp brackets usually adopt the side clamping method, which has the disadvantages of limited clamping force and limited load-bearing torque strength. Another method is the shrinkage and tightening method, which has the disadvantages of changing the distance between the two side brackets, which can easily cause the lamp body to be unstable during assembly, and easily cause wear to the lamp bracket, affecting the assembly effect. Therefore, how to make the lamp body with the adjusted angle fixed at a specified angle under the clamping action of the lamp bracket for use is a technical problem that needs to be solved urgently by technicians in this field.

[0028] See also Figure 1 to Figure 5In order to solve the above problems, the embodiment of the present application provides an angle adjustment limit device 10, including a bracket 20, a transmission assembly 30, a knob 41, an elastic member 42, a threaded shaft 43, a first clamping member 44, a second clamping member 45 and a mounting member 50; the threaded shaft 43 is fixed to the bracket 20, one end of the threaded shaft 43 having a threaded structure extends out of the bracket 20, and the knob 41 is threadedly connected to the threaded structure; the first clamping member 44 is fixedly connected to the mounting member 50, and the first clamping member 44 is rotatably connected to the bracket 20 and / or the threaded shaft 43, and the first clamping member 44 and the second clamping member 45 are connected. The two are buckled together along the rotation axis direction P1 so that the two are limited in the rotation axis direction P1, and the rotation axis direction P1 is parallel to the length direction of the threaded shaft 43; the transmission component 30 is slidably connected to the bracket 20 along the rotation axis direction P1, and an elastic member 42 is connected between the transmission component 30 and the bracket 20. A second engaging member 45 is fixed to one end of the transmission component 30 along the rotation axis direction P1, and the other end is against the knob 41. The elastic member 42 provides an elastic force to the transmission component 30 to move toward the side of the knob 41, so as to drive the second engaging member 45 to move in the rotation axis direction P1 to separate from the first engaging member 44.

[0029] See also Figure 1 to Figure 5In the angle adjustment limit device 10 provided in the present application, the angle adjustment limit device 10 includes a bracket 20, a transmission assembly 30, a knob 41, an elastic member 42, a threaded shaft 43, a first engaging member 44, a second engaging member 45 and a mounting member 50. The bracket 20 can play a supporting role. When the angle adjustment limit device 10 is used to install the lamp body 60, the bracket 20 can be set as a U-shaped bracket 20, and the mounting member 50 can be set as two, respectively arranged at the two ends of the bracket 20 U-shaped, so as to facilitate the installation of the lamp body 60, so that the two sides of the lamp body 60 are connected to the mounting member 50, so as to facilitate the fixing of the position of the lamp body 60 and the adjustment of the angle of the lamp body 60. The threaded shaft 43 is fixed to the bracket 20, and one end of the threaded shaft 43 with a threaded structure extends out of the bracket 20. The knob 41 is threadedly connected to the threaded structure, and the knob 41 is arranged on one side of the threaded structure. When in use, the user can adjust the angle adjustment limit device 10 by rotating the knob 41. The first engaging member 44 is fixedly connected to the mounting member 50, and the first engaging member 44 is rotatably connected to the bracket 20, or the first engaging member 44 is rotatably connected to the threaded shaft 43, that is, the mounting member 50 and the first engaging member 44 can rotate together with the bracket 20 or the threaded shaft 43 when the bracket 20 or the threaded shaft 43 rotates, and since the lamp body 60 is connected to the mounting member 50, the rotation of the bracket 20 or the threaded shaft 43 drives the adjustment of the angle of the lamp body 60. In some embodiments, a nut 431 is fixed to one end of the threaded shaft 43 having a threaded structure, and the threaded shaft 43 is fixed to the bracket 20 through the nut 431, and the nut 431 is located between the knob 41 and the bracket 20, so that the threaded shaft 43 and the bracket 20 are in a relatively static state. The first engaging member 44 and the second engaging member 45 are buckled in the rotation axis direction P1. In some embodiments, the first engaging member 44 and the second engaging member 45 can both adopt a toothed disc structure. The diameters of the toothed discs of the first engaging member 44 and the second engaging member 45 are the same. The first engaging member 44 and the second engaging member 45 can achieve position limiting in the rotation axis direction P1. The rotation axis direction P1 is parallel to the length direction of the threaded shaft 43. Specifically, the first engaging member 44 can be provided with a toothed structure 46 on the side facing the second engaging member 45, and the second engaging member 45 is provided with a toothed structure 46 on the side facing the first engaging member 44. The toothed structures 46 provided on the first engaging member 44 and the second engaging member 45 can mesh with each other. The rotating knob 41 can adjust the positional relationship between the first engaging member 44 and the second engaging member 45. When the first engaging member 44 and the second engaging member 45 are meshed through the toothed structure 46, the two can achieve position limiting in the rotation axis direction P1.The first engaging member 44 and the second engaging member 45 are engaged with each other in the rotation axis direction P1 to achieve positioning limitation in the rotation axis direction P1. Compared with the prior art structure of tightening the screw nut 431 to achieve positioning limitation, this embodiment is more labor-saving and has better positioning effect and is not easy to loosen. The lamp body 60 with the adjusted angle can be stably fixed at the specified angle, thereby improving the use effect.

[0030] See also Figure 3 , Figure 4 and Figure 5 In some embodiments, the transmission assembly 30 is slidably connected to the bracket 20 along the rotation axis direction P1. A second engaging member 45 is fixed to one end of the transmission assembly 30 along the rotation axis direction P1. The second engaging member 45 can move along the rotation axis direction P1 under the drive of the transmission assembly 30. Since the first engaging member 44 is fixed to the mounting member 50, when the second engaging member 45 moves along the rotation axis direction P1 to a side away from the first engaging member 44, the toothed structures 46 of the first engaging member 44 and the second engaging member 45 are separated to release the limiting relationship between the first engaging member 44 and the second engaging member 45. The other end of the transmission assembly 30 abuts against the knob 41. An elastic member 42 is connected between the transmission assembly 30 and the bracket 20. The elastic member 42 provides an elastic force to the transmission assembly 30 to move toward the side of the knob 41, so as to drive the second engaging member 45 to move along the rotation axis direction P1 to separate from the first engaging member 44.

[0031] See also Figure 3 and Figure 4 In some embodiments, the first engaging member 44 and the second engaging member 45 are sleeved on the threaded shaft 43. For example, when the first engaging member 44 and the second engaging member 45 are both toothed discs, a through hole is opened at the center of the first engaging member 44 and the second engaging member 45, and the threaded shaft 43 can pass through the through holes at the center of the first engaging member 44 and the second engaging member 45, respectively. In some embodiments, the side of the first engaging member 44 close to the knob 41 abuts against the bracket 20, which can improve the compactness of the assembly between the structures. When the first engaging member 44 and the second engaging member 45 are engaged with each other, the side of the first engaging member 44 close to the knob 41 abuts against the bracket 20, which can ensure that the internal structure of the angle adjustment limit device 10 is compact, avoid the phenomenon of looseness between the structures, and improve the stability of the limit. The second engaging member 45 is sleeved on the first engaging member 44, and there is a moving gap between the side of the second engaging member 45 close to the knob 41 and the bracket 20. When the knob 41 is rotated to make the second engaging member 45 move along the rotation axis direction P1 away from the first engaging member 44 under the drive of the transmission assembly 30, the moving gap can provide moving space for the second engaging member 45, avoiding the friction between the second engaging member 45 and the bracket 20 during the movement to cause unnecessary wear, and can increase the service life of the angle adjustment limit device 10.

[0032] See also Figure 3 and Figure 4 , Figure 4 Schematic diagram of the structure of the first engaging member 44 and the second engaging member 45 of the angle adjustment limit device 10 of an embodiment. In some embodiments, a sleeve 441 is provided in the first engaging member 44, a threaded shaft 43 is sleeved on the inner wall of the sleeve 441, and the second engaging member 45 is sleeved on the outer wall of the sleeve 441. For example, the sleeve 441 can be provided at the center of the first engaging member 44. The sleeve 441 partially extends into the mounting member 50, the threaded shaft 43 passes through the mounting member 50 and a nut 51 is provided at one end close to the mounting member 50, and the nut 51 abuts against the sleeve 441 and the mounting member 50 in the rotation axis direction P1, so that when the second engaging member 45 moves, the threaded shaft 43 and the first engaging member 44 are in a relatively static state. The shaft sleeve 441 provided on the first engaging member 44 can play a limiting role. On the one hand, the shaft sleeve 441 can ensure the positional relationship between the first engaging member 44 and the threaded shaft 43. On the other hand, since the second engaging member 45 is sleeved on the outer wall of the shaft sleeve 441, the shaft sleeve 441 also plays a limiting role for the movement of the second engaging member 45. When the angle adjustment limit device 10 is adjusting the tightness, the movement between its internal structures is in the set position, which is beneficial to avoid unnecessary wear between parts and thereby improve the service life of the angle adjustment limit device 10.

[0033] See also Figure 2 , Figure 3 and Figure 5In some embodiments, the transmission assembly 30 includes a transmission base 31 and a transmission rod 32 that are fixedly connected. The transmission base 31 is slidably connected to the bracket 20 along the rotation axis direction P1 and abuts against the knob 41. One end of the transmission rod 32 is connected to the transmission base 31, and the other end is connected to the second engaging member 45. The transmission rod 32 can adopt a cylindrical guide rod structure. The setting direction of the transmission rod 32 is parallel to the axial direction of the threaded shaft 43, so that the transmission rod 32 can move together with the second engaging member 45 to the side away from the mounting member 50. In some embodiments, a thread is provided at one end of the transmission rod 32 close to the transmission base 31, and a thread is also provided at one side of the transmission base 31 close to the transmission rod 32. The transmission rod 32 can be engaged in the transmission base 31 through the threaded structure. The transmission rod 32 may be provided in plurality, for example, three transmission rods 32 may be evenly provided around the threaded shaft 43, the axis of the three adjacent transmission rods 32 and the axis of the threaded shaft 43 being 120° apart, and the provision of a plurality of transmission rods 32 may guide the movement of the second engaging member 45 in different directions. The second engaging member 45 is located between the transmission rod 32 and the first engaging member 44, and the elastic member 42 is connected between the transmission base 31 and the bracket 20. In some embodiments, the elastic member 42 includes a compression spring, which is sleeved on the transmission rod 32, and the elastic member 42 may provide an elastic force, and one end of the compression spring close to the second engaging member 45 abuts against the bracket 20, and the other end abuts against the transmission base 31. When in use, the user compresses the spring in the guide groove 21, and the elastic force of the compression spring can separate the first engaging member 44 and the second engaging member 45. The knob 41 is turned to apply pressure to the transmission assembly 30 on one side of the mounting seat, so that the first engaging member 44 and the second engaging member 45 are meshed together, thereby realizing the separation and engagement process between the first engaging member 44 and the second engaging member 45, and realizing the process of adjusting the angle and limiting the position.

[0034] See also Figure 2 and Figure 3 In some embodiments, a guide groove 21 extending along the rotation axis direction P1 is provided in the bracket 20, and the transmission rod 32 is slidably connected in the guide groove 21. The guide groove 21 has a limiting effect on the moving direction of the transmission rod 32. At the same time, the guide groove 21 can also limit the position of the transmission rod 32 in the radial direction. The elastic member 42 is sleeved on the transmission rod 32, and the guide groove 21 can also limit the elastic member 42. When the first engaging member 44 and the second engaging member 45 are engaged with each other, the elastic member 42 is in a compressed state in the guide groove 21. At this time, the groove wall of the guide groove 21 can resist the elastic force of the elastic member 42, thereby limiting the elastic member 42 and fixing its position.

[0035] See also Figure 1 to Figure 5When the angle adjustment limit device 10 is used, the lamp body 60 is mounted on the mounting member 50. In some embodiments, the side of the mounting member 50 close to the lamp body 60 can be set as a trapezoidal structure, and the side close to the edge is the short side of the trapezoidal structure, which is conducive to the installation of the lamp body 60. The bracket 20 can adopt a U-shaped structure, and the mounting members 50 are respectively arranged at the two ends of the U-shaped structure. When the user uses the angle adjustment limit device 10 for installation and adjustment, first fix the lamp body 60 on the mounting member 50, and the mounting member 50 is arranged on two opposite sides of the lamp body 60. It should be noted that during the adjustment process of the angle adjustment limit device 10, the distance between the two mounting members 50 remains constant. After that, the lamp body 60 and the mounting member 50 are in a relatively static state. When the angle of the lamp body 60 needs to be adjusted, the knob 41 is rotated to make the angle adjustment limit device 10 in a twisted loose state. At this time, the first engaging member 44 and the second engaging member 45 are in a separated state. Then the user can manually rotate the lamp body 60, or manually rotate the bracket 20 to adjust the lamp body 60 to the angle required by the user. Furthermore, the angle of the lamp body 60 is fixed. Specifically, the knob 41 is rotated to put the angle adjustment limit device 10 in a tightened state. At this time, the first engaging member 44 and the second engaging member 45 are in an engaged state. During this process, the second engaging member 45, the transmission base 31, and the transmission rod 32 move together along the rotation axis direction P1 toward the side close to the mounting member 50. When the tooth structure 46 of the first engaging member 44 and the second engaging member 45 are engaged with each other, the angle position of the lamp body 60 is limited. This process saves the user effort in adjusting the angle, and at the same time, the lamp body 60 with the adjusted angle can be stably fixed at the specified angle, thereby improving the use effect.

[0036] See also Figure 1 The lighting device of the second embodiment of the present invention comprises a lamp body 60 and the angle adjustment and limiting device 10 of the first embodiment, and the lamp body 60 is mounted on the mounting member 50. Since the present embodiment adopts all the technical features of the angle adjustment and limiting device 10 of the first embodiment, the present embodiment has all the beneficial effects brought by the first embodiment, which will not be described in detail here.

[0037] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0038] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. An angle adjustment limit device, characterized in that: The invention comprises a bracket, a transmission assembly, a knob, an elastic member, a threaded shaft, a first clamping member, a second clamping member and a mounting member; the threaded shaft is fixed to the bracket, one end of the threaded shaft having a threaded structure extends out of the bracket, and the knob is threadedly connected with the threaded structure; the first clamping member is fixedly connected with the mounting member, and the first clamping member is rotatably connected with the bracket and / or the threaded shaft, the first clamping member and the second clamping member are buckled in the direction of the rotation axis so that the two can be limited in the direction around the rotation axis, and the rotation axis direction is parallel to the length direction of the threaded shaft; The transmission component is slidably connected to the bracket along the rotation axis direction, and an elastic member is connected between the transmission component and the bracket. The second engaging member is fixed to one end of the transmission component along the rotation axis direction, and the other end is abutted against the knob. The elastic member provides an elastic force to the transmission component to move toward one side of the knob, so as to drive the second engaging member to move along the rotation axis direction to separate from the first engaging member.

2. The angle adjustment limit device according to claim 1, characterized in that: A toothed structure is provided on one side of the first engaging member facing the second engaging member, and a toothed structure is provided on one side of the second engaging member facing the first engaging member. The first engaging member and the second engaging member are meshed with each other through the toothed structure to achieve position limiting in the direction around the rotation axis.

3. The angle adjustment limit device according to claim 1, characterized in that: The first engaging member and the second engaging member are sleeved on the threaded shaft.

4. The angle adjustment limit device according to claim 1, characterized in that: A side of the first engaging member close to the knob abuts against the bracket, and the second engaging member is sleeved on the first engaging member. A moving gap exists between a side of the second engaging member close to the knob and the bracket.

5. The angle adjustment and limiting device according to claim 4, characterized in that: A shaft sleeve is provided in the first engaging member, the inner wall of the shaft sleeve is sleeved with the threaded shaft, the second engaging member is sleeved on the outer wall of the shaft sleeve, the shaft sleeve partially extends into the mounting member, the threaded shaft passes through the mounting member and a nut is provided at one end close to the mounting member, the nut abuts against the shaft sleeve and the mounting member in the direction of the rotating shaft.

6. The angle adjustment and limiting device according to claim 1, characterized in that: The transmission assembly includes a transmission base and a transmission rod that are fixedly connected. The transmission base is slidably connected to the bracket along the rotation axis and abuts against the knob. One end of the transmission rod is connected to the transmission base, and the other end is connected to the second clamping member. The second clamping member is located between the transmission rod and the first clamping member. The elastic member is connected between the transmission base and the bracket.

7. The angle adjustment and limiting device according to claim 6, characterized in that: The elastic member comprises a compression spring, which is sleeved on the transmission rod. One end of the compression spring close to the second engaging member abuts against the bracket, and the other end of the compression spring abuts against the transmission base.

8. The angle adjustment and limiting device according to claim 7, characterized in that: The bracket is provided with a guide groove extending along the direction of the rotating shaft, and the transmission rod is slidably connected in the guide groove.

9. The angle adjustment and limiting device according to claim 1, characterized in that: A nut is fixed to one end of the threaded shaft having a threaded structure, and the threaded shaft is fixed to the bracket through the nut, and the nut is located between the knob and the bracket.

10. A lighting device, characterized in that: It comprises a lamp body and the angle adjustment and limiting device as claimed in any one of claims 1 to 9, wherein the lamp body is mounted on the mounting member.

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