Angle adjustment device and lighting fixture

Abstract

The application discloses an angle adjusting device and a lighting lamp, and relates to the technical field of lighting. The angle adjusting device comprises a sleeve part, a connecting rod part and a rotating shaft assembly. The sleeve part comprises a lamp rod mounting end and a first connecting end. The first connecting end comprises a first side and a second side. A first through hole is arranged in the middle part of the first connecting end. The connecting rod part comprises a lamp head mounting end and a second connecting end. The second connecting end comprises a third side and a fourth side. The third side is rotatably arranged on the first side. The rotating shaft assembly comprises a first rotating shaft and a first gear. The first rotating shaft is rotatably arranged in the first through hole. The first gear is coaxially fixed to one end of the first rotating shaft on the first side. An operation part is arranged on one end of the first rotating shaft on the second side. A speed reduction gear set is drivingly connected between the circumferential edge of the third side and the first gear. The technical scheme can adjust the lighting angle of the lighting lamp almost steplessly without tools, and makes the angle adjusting process easy and labor-saving.

Description

Technical Field

[0001] This application relates to the field of lighting technology, and in particular to an angle adjustment device and a lighting fixture. Background Technology

[0002] Currently, there are two main types of common lighting fixtures: those without angle adjustment and those with angle adjustment. Fixtures with angle adjustment generally consist of a lamp body and an adjustment mechanism. The adjustment mechanism is usually fixed to the lamp body with screws to achieve a locking function after angle adjustment. However, in practical applications, we have found that this type of lighting fixture has the following shortcomings: because the fixture itself cannot achieve tool-free angle adjustment, tools are required for adjustment, which can easily cause inconvenience to users. Additionally, there is a risk of tools falling when adjusting the angle. Summary of the Invention

[0003] The main purpose of this application is to propose an angle adjustment device and a lighting fixture, which aims to solve the technical problems of existing lighting fixtures being unable to achieve tool-free angle adjustment, which easily causes many inconveniences to users, and the risk of tools falling when adjusting the angle at high settings.

[0004] To achieve the above objectives, this application provides an angle adjustment device used in the connection between the lamp post and the lamp head of a lighting fixture, comprising a sleeve portion, a connecting rod portion, a rotating shaft assembly, a reduction gear set, and an operating portion; wherein, The sleeve portion includes a lamp post mounting end and a first connecting end. The first connecting end includes a first side and a second side disposed opposite to each other, and a first through hole is provided through the middle of the first connecting end to connect the first side and the second side. The connecting rod includes a lamp holder mounting end and a second connecting end. The second connecting end includes a third side and a fourth side that are disposed opposite to each other. The third side is rotatably mounted on the first side. The rotating shaft assembly includes a first rotating shaft and a first gear. The first rotating shaft is rotatably installed in the first through hole, and the first gear is coaxially fixed at one end of the first rotating shaft on the first side. The operating part is installed at one end of the first rotating shaft on the second side so as to rotate axially under the drive of the operating part. The reduction gear set is connected between the circumferential edge of the third side and the first gear, so that when the first gear rotates with the first shaft, it drives the second connecting end to rotate relative to the first connecting end.

[0005] Optionally, in some embodiments, a first bearing is fitted onto the middle portion of the first rotating shaft so that it can be rotatably mounted in the first through hole via the first bearing.

[0006] Optionally, in some embodiments, the third side is provided with circumferential teeth along its circumferential direction, and the first connecting end is further provided with at least one second through hole, and the at least one second through hole is arranged around the first through hole. The reduction gear set includes at least one shaft gear assembly, and the at least one shaft gear assembly is configured to correspond one-to-one with the at least one second through hole; The shaft gear assembly includes a second shaft, a second gear, and a third gear. One end of the second shaft is rotatably mounted in the corresponding second through hole, and the other end of the second shaft is coaxially fixed with the second gear and the third gear. The second gear meshes with the first gear, and the third gear meshes with the circumferential toothed teeth.

[0007] Optionally, in some embodiments, a second bearing is fitted onto one end of the second shaft so that it can be rotatably mounted in the second through hole via the second bearing.

[0008] Optionally, in some embodiments, a connecting seat is further included, the connecting seat comprising a seat portion and a shaft portion disposed in contact with each other; The seat is fixed on the first side, and the end of the first rotating shaft located on the first side is rotatably connected to the seat through a third bearing; The shaft portion is rotatably mounted on the third side, such that the third side is rotatably mounted on the first side via the connecting seat.

[0009] Optionally, in some embodiments, a fourth bearing is fixed at one end of the shaft portion away from the seat portion, so that it is rotatably mounted on the third side via the fourth bearing.

[0010] Optionally, in some embodiments, a toothed ring cover with circumferential teeth is fixedly provided on the circumferential edge of the third side, and a third through hole is provided through the middle of the toothed ring cover. The end of the shaft part away from the seat part is rotatably installed in the third through hole through the fourth bearing.

[0011] Optionally, in some embodiments, a bearing cap and a movable locking part are also included; The bearing cover is installed on the second side, and the first rotating shaft is located at one end on the second side, passing through the bearing cover and then installed with the operating part. The bearing cover is also provided with a plurality of limiting holes, which are evenly distributed along the circumference of the first rotating shaft. The operating part is provided with a limiting protrusion that can be limited and engaged with any of the limiting holes. The operating part is elastically mounted on the first rotating shaft by the movable locking part, and without the action of external force, the limiting protrusion is locked in any of the limiting holes by the elastic force of the movable locking part.

[0012] Optionally, in some embodiments, the movable locking part includes a bolt, a nut, a torsion spring limiting block with a first limiting part, and at least one torsion spring, and the operating part is further provided with a second limiting part; The operating part is rotatably mounted on the first rotating shaft by means of the bolt and the nut, and the extension direction of the bolt is perpendicular to the extension direction of the first rotating shaft; The torsion spring limiting block is fixed at the end of the first rotating shaft located on the second side; At least one torsion spring is sleeved and fixed on the bolt, and the first abutting end of the torsion spring abuts against the first limiting part, and the second abutting end of the torsion spring abuts against the second limiting part, so that, without the action of external force, the elastic force of the torsion spring causes the limiting protrusion to be engaged in any of the limiting holes.

[0013] In addition, to achieve the above objectives, this application also provides a lighting fixture, including a lamp post, a lamp head, and the aforementioned angle adjustment device, wherein the lamp post mounting end of the angle adjustment device is installed on the top of the lamp post, and the lamp head mounting end of the angle adjustment device is provided with the lamp head.

[0014] The angle adjustment device and lighting fixture provided in this application include a sleeve portion, a connecting rod portion, a rotating shaft assembly, a reduction gear set, and an operating part. The sleeve portion includes a lamp post mounting end and a first connecting end. The first connecting end includes a first side and a second side disposed opposite to each other, and a first through hole is provided through the middle of the first connecting end to connect the first side and the second side. The connecting rod portion includes a lamp holder mounting end and a second connecting end. The second connecting end includes a third side and a fourth side disposed opposite to each other, with the third side rotatably mounted on the first side. The rotating shaft assembly includes a first rotating shaft and a first gear. The first rotating shaft is rotatably mounted in the first through hole, and the first gear is coaxially fixed to one end of the first rotating shaft on the first side. An operating part is mounted to one end of the first rotating shaft on the second side for axial rotation under the drive of the operating part. The reduction gear set is driven between the circumferential edge of the third side and the first gear, so that when the first gear rotates with the first rotating shaft, it drives the second connecting end to rotate relative to the first connecting end. In this way, when the lamp post and lamp head of this lighting device are connected via this angle adjustment device, the lamp post mounting end of the sleeve portion of the angle adjustment device is installed at the top of the lamp post, and the lamp head mounting end of the connecting rod portion of the angle adjustment device is installed with the lamp head. The operating unit can then drive the first rotating shaft to rotate the first gear. Under the transmission of the reduction gear set, the second connecting end rotates relative to the first connecting end at a slower speed. For example, taking a reduction gear ratio of 1 / N, if the operating unit drives the first rotating shaft to rotate one revolution, the second connecting end rotates 1 / N revolutions relative to the first connecting end, thus causing the lamp head to rotate 1 / N revolutions relative to the lamp post. Therefore, the device allows for near-stepless adjustment of the lighting angle, and the adjustment is very easy and effortless. It is evident that this technical solution allows for near-stepless adjustment of the lighting angle of lighting fixtures without tools, while making the angle adjustment process easy and effortless. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the structure of a lighting fixture according to an embodiment of this application.

[0017] Figure 2 for Figure 1 A schematic diagram of the angle adjustment device for the lighting fixture shown.

[0018] Figure 3 for Figure 2 A schematic diagram of a split structure of the angle adjustment device shown.

[0019] Figure 4 for Figure 2 A schematic diagram of another split structure of the angle adjustment device shown.

[0020] Figure 5 for Figure 2 A partial structural breakdown diagram of the angle adjustment device shown.

[0021] Figure 6 for Figure 2 A schematic diagram of the first angle adjustment state of the angle adjustment device shown.

[0022] Figure 7 for Figure 2 A schematic diagram of the first angle adjustment state of the angle adjustment device shown. Detailed Implementation

[0023] The specific embodiments of this application will be further described below with reference to the accompanying drawings. It should be noted that these descriptions are for the purpose of aiding understanding of this application and do not constitute a limitation thereof. Furthermore, the technical features involved in the various embodiments of this application described below can be combined with each other as long as they do not conflict with each other.

[0024] like Figures 1 to 7 As shown in the figure, this application embodiment provides a lighting fixture 1, which specifically includes a lamp post 100, a lamp head 200, and an angle adjustment device 300. The angle adjustment device 300 specifically includes a sleeve portion 310, a connecting rod portion 320, a rotating shaft assembly 330, a reduction gear set 340, and an operating portion 350. The sleeve portion 310 mainly includes a lamp post mounting end 311 and a first connecting end 312. The first connecting end 312 includes a first side 3121 and a second side 3122 disposed opposite to each other, and a first through hole 31 is provided through the middle of the first connecting end 312 to connect the first side 3121 and the second side 3122. The connecting rod portion 320 mainly includes a lamp head mounting end 321 and a second connecting end 322. The second connecting end 322 includes a third side 3221 and a fourth side 3222 disposed opposite to each other, and the third side 3221 is rotatably mounted on the first side 3121. The rotating shaft assembly 330 mainly includes a first rotating shaft 331 and a first gear 332. The first rotating shaft 331 is rotatably installed in the first through hole 31, and the first gear 332 is coaxially fixed at one end of the first rotating shaft 331 located on the first side 3121. An operating part 350 is installed at one end of the first rotating shaft 331 located on the second side 3122, so that it can rotate axially under the drive of the operating part 350. The reduction gear set 340 is mainly connected to the first gear 332 along the circumferential edge of the third side 3221, so that when the first gear 332 rotates with the first rotating shaft 331, it drives the second connecting end 322 to rotate relative to the first connecting end 312.

[0025] It is understood that the angle adjustment device 300 in this application embodiment is mainly used for the connection between the lamp post 100 and the lamp head 200 in the lighting fixture 1. That is, the lamp post mounting end 311 of the sleeve part 310 of the angle adjustment device 300 is installed on the top of the lamp post 100, and the lamp head mounting end 321 of the connecting rod part 320 of the angle adjustment device 300 is equipped with the lamp head 200. Then, by rotating the second connecting end 322 of the connecting rod part 320 relative to the first connecting end 312 of the sleeve part 310, the lamp head 200 is rotated relative to the lamp post 100, thereby realizing the corresponding lighting angle adjustment. To facilitate better installation and protection of the first gear 332 and the reduction gear set 340 between the third side 3221 and the first side 3121, corresponding receiving grooves can be formed by recessing the third side 3221 and the first side 3121 respectively. A corresponding sealed protective space is formed by placing one receiving groove within the other to accommodate the first gear 332 and the reduction gear set 340. The aforementioned operating part 350 can specifically be an operating handle, allowing the user to hold the handle and drive the first rotating shaft 331 to rotate axially.

[0026] In this embodiment of the application, when the lamp post 100 and lamp head 200 of the lighting device are connected by the angle adjustment device 300, the lamp post mounting end 311 of the sleeve portion 310 of the angle adjustment device 300 is installed on the top of the lamp post 100, and the lamp head mounting end 321 of the connecting rod portion 320 of the angle adjustment device 300 is equipped with the lamp head 200. The first rotating shaft 331 can be driven by the operating part 350 to drive the first gear 332 to rotate. Then, under the transmission of the reduction gear set 340, the second connecting end 322 is driven to rotate relative to the first connecting end 312 at a slower speed. For example, if the reduction ratio of the reduction gear set 340 is 1 / N, the operating part 350 drives the first rotating shaft 331 to rotate 1 turn, and the second connecting end 322 rotates 1 / N turns relative to the first connecting end 312, so that the lamp head 200 rotates 1 / N turns relative to the lamp post 100. Therefore, the device can adjust the angle almost steplessly, and the adjustment is very easy and effortless. As can be seen, this technical solution allows for near-stepless adjustment of the lighting angle of the lighting fixture 1 without tools, while making the angle adjustment process easy and effortless.

[0027] In some examples, such as Figure 2 , Figure 3 and Figure 5As shown, a first bearing 361 is fitted into the middle of the first rotating shaft 331, allowing it to be rotatably mounted in the first through hole 31. This structural arrangement of the first bearing 361 ensures that the first rotating shaft 331 is better positioned within the first through hole 31 and can rotate axially relative to the first connecting end 312. Furthermore, to facilitate the assembly of the first bearing 361, a corresponding bearing recess (not shown) can be formed at one end of the first through hole 31 located on the second side 3122 to support and mount the first bearing 361.

[0028] In some examples, such as Figure 2 , Figure 3 and Figure 5 As shown, the third side 3221 has circumferential teeth 3231 along its circumferential direction. The first connecting end 312 also has at least one second through hole 32, and the at least one second through hole 32 is arranged around the first through hole 31. The reduction gear set 340 includes at least one shaft gear assembly 341, and the at least one shaft gear assembly 341 is arranged in a one-to-one correspondence with the at least one second through hole 32. The shaft gear assembly 341 includes a second rotating shaft 3411, a second gear 3412, and a third gear 3413. One end of the second rotating shaft 3411 is rotatably installed in the corresponding second through hole 32, and the other end of the second rotating shaft 3411 is coaxially fixed with the second gear 3412 and the third gear 3413. The second gear 3412 is meshed with the first gear 332, and the third gear 3413 is meshed with the circumferential teeth 3231. In this way, with the above-described structure, when the first gear 332 rotates following the first shaft 331, it drives the second gear 3412 of each shaft-mounted gear assembly 341 to rotate via gear meshing. Simultaneously, the rotation of the second gear 3412 in each shaft-mounted gear assembly 341 causes the corresponding second shaft 3411 and third gear 3413 to rotate. Since the radii of the second gear 3412, the third gear 3413, and the first gear 332 are all different, the number of rotations of the third gear 3413 differs from the number of rotations of the first gear 332. Therefore, by adjusting the ratio between the radii of these gears, a corresponding reduction ratio can be obtained, resulting in the speed of the third gear 3413 being much slower than the speed of the first gear 332. Furthermore, a second bearing 362 is fitted onto one end of the second shaft 3411, allowing it to rotatably mount in the second through hole 32. In this way, the structure of the second bearing 362 allows the second rotating shaft 3411 to be better positioned in the second through hole 32 and to rotate axially relative to the first connecting end 312. At the same time, to facilitate the assembly of the second bearing 362, a corresponding bearing recess (not shown) can be formed at one end of the second through hole 32 located on the second side 3122 to support and install the second bearing 362.

[0029] It is understandable that, since the circumferential edge of the third side 3221 is generally circular, in order to enable the reduction gear set 340 to more stably connect with the circumferential tooth pattern 3231 of the circumferential edge of the third side 3221, the reduction gear set 340 may specifically include three shaft gear assemblies 341, and the three shaft gear assemblies 341 are arranged in a triangular distribution around the first gear 332. The second gear 3412 of each shaft gear assembly 341 meshes with the first gear 332, and the third gear 3413 of each shaft gear assembly 341 meshes with the circumferential tooth pattern 3231.

[0030] In some examples, such as Figure 2 , Figure 3 and Figure 5 As shown, the angle adjustment device 300 also includes a connecting seat 370, which includes a seat body portion 371 and a shaft body portion 372 connected together. The seat body portion 371 is fixed on the first side 3121, and the end of the first rotating shaft 331 located on the first side 3121 is rotatably connected to the seat body portion 371 via a third bearing 363. The shaft body portion 372 is rotatably mounted on the third side 3221, so that the third side 3221 is rotatably mounted on the first side 3121 via the connecting seat 370. It can be understood that, in order to avoid the installation of the connecting seat 370 from affecting the normal operation of the reduction gear set 340, the seat body portion 371 is provided with corresponding clearance positions for each third gear 3413. In this way, the structural arrangement of the connecting seat 370 ensures that while the first rotating shaft 331 rotates axially relative to the first connecting end 312, the third side 3221 is better rotatably mounted on the first side 3121. Furthermore, a fourth bearing 364 is fixedly provided at the end of the shaft portion 372 away from the seat portion 371, so that it can be rotatably mounted on the third side 3221 via the fourth bearing 364. Even further, a toothed ring cover 323 with circumferential teeth 3231 is fixedly provided along the circumferential edge of the third side 3221, and a third through hole 33 is provided through the center of the toothed ring cover 323. The end of the shaft portion 372 away from the seat portion 371 is rotatably mounted in the third through hole 33 via the fourth bearing 364. In this way, the structure of the fourth bearing 364 allows the shaft portion 372 to be better positioned in the third through hole 33, and allows the second connecting end to rotate axially relative to the shaft portion 372.

[0031] In some examples, such as Figure 2 , Figure 3 , Figure 4 , Figure 6 and Figure 7As shown, the angle adjustment device 300 also includes a bearing cover 380 and a movable locking part 390. The bearing cover 380 is installed on the second side 3122, and the first rotating shaft 331 is located at one end of the second side 3122, passing through the bearing cover 380 and having an operating part 350 installed thereon. The bearing cover 380 also has multiple limiting holes 381, which are evenly distributed along the circumference of the first rotating shaft 331. The operating part 350 is provided with a limiting protrusion 351 that can engage with any of the limiting holes 381. The operating part 350 is elastically installed on the first rotating shaft 331 by the movable locking part 390, and without external force, the elastic force of the movable locking part 390 causes the limiting protrusion 351 to engage with any of the limiting holes 381. In this way, through the above structural arrangement, after the angle adjustment is completed, the elastic force of the movable locking part 390 causes the limiting protrusion 351 of the operating part 350 to... Figure 6 The device is positioned in a limiting hole 381 corresponding to its current position, ensuring a stable connection after angle adjustment and preventing the lighting fixture 1 from shifting its lighting angle during illumination. When angle adjustment is required, external force is applied to the operating part to overcome the elastic force of the movable locking part 390, causing the limiting protrusion 351 of the operating part 350 to... Figure 7 After disengaging from the corresponding limiting hole 381, the angle can be adjusted accordingly. The adjustment process is as follows: Taking the number of multiple limiting holes 381 as M and the reduction ratio of the reduction gear set 340 as 1 / N as an example, the second connecting end 322 rotates only 360° / M*N relative to the first connecting end 312 for every rotation of the operating part 350 by one scale groove (that is, from the position corresponding to one limiting hole 381 to the position corresponding to another adjacent limiting hole 381 on the limiting protrusion 351 of the operating part 350), so that the lamp head 200 rotates only 360° / M*N relative to the lamp post 100. Therefore, the device can adjust the angle almost steplessly, and the adjustment is very easy and effortless.

[0032] In some examples, such as Figure 2 , Figure 3 and Figure 4The movable locking part 390 may specifically include a bolt 391, a nut 392, a torsion spring limiting block 393 with a first limiting part 3931, and at least one torsion spring 394. The operating part 350 is also provided with a second limiting part 352. The operating part 350 is rotatably mounted on the first rotating shaft 331 through the cooperation of the bolt 391 and the nut 392, and the extension direction of the bolt 391 is perpendicular to the extension direction of the first rotating shaft 331. The torsion spring limiting block 393 is fixed at the end of the first rotating shaft 331 located on the second side 3122. At least one torsion spring 394 is sleeved and fixed on the bolt 391, and the first abutting end 3941 of the torsion spring 394 abuts against the first limiting part 3931, and the second abutting end 3942 of the torsion spring 394 abuts against the second limiting part 352, so that, without the action of external force, the elastic force of the torsion spring 394 causes the limiting protrusion 351 to be engaged in any limiting hole 381. In this way, the above-mentioned structural arrangement allows the movable locking part 390 to better engage the limiting protrusion 351 in any limiting hole 381 without external force, through the elastic force of the movable locking part 390.

[0033] Understandably, in order to better realize the rotatable mounting of the operating part 350 on the first rotating shaft 331 via the cooperation of bolt 391 and nut 392, one end of the operating part 350 can form a U-shaped connecting part. One end of the bolt 391 passes through one end of the opening of the U-shaped connecting part, the first rotating shaft 331, and the other end of the opening of the U-shaped connecting part in sequence, and is then threadedly connected to the nut 392. This allows one end of the operating part 350 to rotate relative to the first rotating shaft 331 with the bolt 391 as the rotating shaft. At the same time, since the extension direction of the bolt 391 is perpendicular to the extension direction of the first rotating shaft 331, the operating part 350 can also drive the first rotating shaft 331 to rotate axially when it rotates around the first rotating shaft 331. In addition, to ensure that the torsion spring 394 of the entire movable locking part 390 can act better on the operating part 350, two torsion springs 394 can be provided, and the two torsion springs 394 are respectively provided on both sides of the first rotating shaft 331. This allows one end of the bolt 391 to pass through one end of the opening of the U-shaped connector, one torsion spring 394, the first rotating shaft 331, the other torsion spring 394, and the other end of the opening of the U-shaped connector in sequence before being threadedly connected to the nut 392. At the same time, to cooperate with the setting of the two torsion springs 394, two first limiting parts 3931 can be correspondingly provided on the torsion spring limiting block 393, and two second limiting parts 352 can be correspondingly provided on the operating part 350.

[0034] Although this application has been shown and described with respect to one or more implementations, equivalent variations and modifications will occur to those skilled in the art based on a reading and understanding of this specification and the accompanying drawings. This application includes all such modifications and variations and is limited only by the scope of the appended claims. In particular, with respect to the various functions performed by the aforementioned components, the terminology used to describe such components is intended to correspond to any component (unless otherwise indicated) that performs the specified function of said component (e.g., is functionally equivalent to it), even if structurally not equivalent to the disclosed structure performing the functions in the exemplary implementations of this specification shown herein.

[0035] That is, the above description is only an embodiment of this application and does not limit the patent scope of this application. Any equivalent structural or procedural changes made using the content of this application’s specification and drawings, such as the combination of technical features between different embodiments, or direct or indirect application in other related technical fields, are similarly included within the patent protection scope of this application.

[0036] Furthermore, it should be understood that in the description of this application, the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application 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 application. Additionally, for structural elements with the same or similar characteristics, this application may use the same or different reference numerals for identification. Moreover, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0037] In this application, the term "exemplary" is used to mean "serving as an example, illustration, or description." Any embodiment described as "exemplary" in this application is not necessarily to be construed as more preferred or advantageous than other embodiments. This application has been provided above to enable any person skilled in the art to implement and use it. Various details have been set forth in the above description for purposes of explanation. It should be understood that those skilled in the art will recognize that this application can be implemented without using these specific details. In other embodiments, well-known structures and processes will not be described in detail to avoid obscuring the description of this application with unnecessary detail. Therefore, this application is not intended to be limited to the embodiments shown, but is consistent with the broadest scope of the principles and features disclosed herein.

Claims

1. An angle adjustment device, used in the connection between the lamp post and the lamp head of a lighting fixture, characterized in that, It includes a sleeve section, a connecting rod section, a rotating shaft assembly, a reduction gear set, and an operating section; among which, The sleeve portion includes a lamp post mounting end and a first connecting end. The first connecting end includes a first side and a second side disposed opposite to each other, and a first through hole is provided through the middle of the first connecting end to connect the first side and the second side. The first connecting end is also provided with at least one second through hole, and the at least one second through hole is disposed around the first through hole. The connecting rod includes a lamp holder mounting end and a second connecting end. The second connecting end includes a third side and a fourth side arranged opposite to each other. The third side is rotatably mounted on the first side, and the third side is provided with circumferential teeth along its circumferential direction. The rotating shaft assembly includes a first rotating shaft and a first gear. The first rotating shaft is rotatably installed in the first through hole, and the first gear is coaxially fixed at one end of the first rotating shaft on the first side. The operating part is installed at one end of the first rotating shaft on the second side so as to rotate axially under the drive of the operating part. The reduction gear set is driven between the circumferential edge of the third side and the first gear, so that when the first gear rotates with the first shaft, it drives the second connecting end to rotate relative to the first connecting end; the reduction gear set includes at least one shaft gear assembly, and the at least one shaft gear assembly is provided in a one-to-one correspondence with the at least one second through hole; The shaft gear assembly includes a second shaft, a second gear, and a third gear. One end of the second shaft is rotatably mounted in the corresponding second through hole, and the other end of the second shaft is coaxially fixed with the second gear and the third gear. The second gear meshes with the first gear, and the third gear meshes with the circumferential toothed teeth.

2. The angle adjustment device according to claim 1, characterized in that, A first bearing is fitted in the middle of the first rotating shaft so that it can be rotatably mounted in the first through hole via the first bearing.

3. The angle adjustment device according to claim 1, characterized in that, One end of the second shaft is fitted with a second bearing, so that it can be rotatably mounted in the second through hole via the second bearing.

4. The angle adjustment device according to claim 1, characterized in that, It also includes a connecting seat, which includes a seat body portion and a shaft body portion that are connected to each other; The seat is fixed on the first side, and the end of the first rotating shaft located on the first side is rotatably connected to the seat through a third bearing; The shaft portion is rotatably mounted on the third side, such that the third side is rotatably mounted on the first side via the connecting seat.

5. The angle adjustment device according to claim 4, characterized in that, A fourth bearing is fixed at one end of the shaft portion away from the seat portion, so that it is rotatably mounted on the third side via the fourth bearing.

6. The angle adjustment device according to claim 5, characterized in that, A toothed ring cover with circumferential teeth is fixedly provided on the circumferential edge of the third side. A third through hole is provided through the middle of the toothed ring cover. The end of the shaft part away from the seat part is rotatably installed in the third through hole through the fourth bearing.

7. The angle adjusting device according to any one of claims 1-6, characterized in that, It also includes a bearing cover and a movable locking part; The bearing cover is installed on the second side, and the first rotating shaft is located at one end on the second side, passing through the bearing cover and then installed with the operating part. The bearing cover is also provided with a plurality of limiting holes, which are evenly distributed along the circumference of the first rotating shaft. The operating part is provided with a limiting protrusion that can be limited and engaged with any of the limiting holes. The operating part is elastically mounted on the first rotating shaft by the movable locking part, and without the action of external force, the limiting protrusion is locked in any of the limiting holes by the elastic force of the movable locking part.

8. The angle adjustment device according to claim 7, characterized in that, The movable locking part includes a bolt, a nut, a torsion spring limiting block with a first limiting part, and at least one torsion spring; the operating part is also provided with a second limiting part. The operating part is rotatably mounted on the first rotating shaft by means of the bolt and the nut, and the extension direction of the bolt is perpendicular to the extension direction of the first rotating shaft; The torsion spring limiting block is fixed at the end of the first rotating shaft located on the second side; At least one torsion spring is sleeved and fixed on the bolt, and the first abutting end of the torsion spring abuts against the first limiting part, and the second abutting end of the torsion spring abuts against the second limiting part, so that, without the action of external force, the elastic force of the torsion spring causes the limiting protrusion to be engaged in any of the limiting holes.

9. A lighting fixture, characterized in that, It includes a lamp post, a lamp head, and an angle adjustment device as described in any one of claims 1-8, wherein the lamp post mounting end of the angle adjustment device is mounted on the top of the lamp post, and the lamp head is mounted on the lamp head mounting end of the angle adjustment device.

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