A pan-tilt connection structure

Abstract

The present invention relates to the field of photographic equipment technology, and in particular to a pan-tilt connection structure, which includes a pan-tilt main body with a cavity provided therein; a ball joint, with a ball joint disposed in the cavity; a damping block disposed in the cavity, the damping block having a ball joint circular surface, the ball joint circular surface being used to support the bottom of the ball joint; a first adjustment mechanism disposed in the cavity, for driving the damping block to rise and fall; and a second adjustment mechanism disposed on the first adjustment mechanism, for fine-tuning the height of the damping block based on the first adjustment mechanism. The pan-tilt connection structure provided by the present invention enables the ball joint to achieve gear-type damping adjustment, and can also coarsely and finely adjust the damping size, making it easier for novice users to use.

Description

Technical Field

[0001] The present invention relates to the field of photographic equipment technology, and in particular to a pan / tilt head connection structure. Background Art

[0002] As we all know, a pan-tilt head for supporting 360-degree rotation of the photographic device is generally installed on the upper part of the photographic stand. The pan-tilt head is usually installed on the photographic stand through a ball joint. At the same time, a lifting structure is provided under the ball joint structure to adjust the damping of the ball joint, which is convenient for adjusting the camera angle.

[0003] Existing lift mechanisms often use a wedge-type push mechanism, with a knob driving a screw to rotate the rod, which in turn drives the wedge to move the lift mechanism up and down, achieving the purpose of adjusting the damping. However, in practice, this adjustment method relies entirely on user experience. Sometimes the adjustment is not accurate, resulting in excessive damping and difficulty in lens rotation. Sometimes the adjustment range is too large, the damping is too low, and the lens shakes significantly. When re-locking the ball joint, there will be large errors, causing inconvenience for novice users. Summary of the Invention

[0004] In view of the shortcomings of the above-mentioned technology, the present invention provides a pan-tilt connection structure, which adopts the following technical solutions:.

[0005] A pan / tilt connection structure includes a pan / tilt main body with a cavity therein; a ball hinge joint, with a ball hinge arranged in the cavity; a damping block arranged in the cavity, the damping block having a ball hinge circular surface, the ball hinge circular surface being used to support the bottom of the ball hinge joint; a first adjustment mechanism arranged in the cavity, for driving the damping block to rise and fall; and a second adjustment mechanism arranged on the first adjustment mechanism, for fine-tuning the height of the damping block based on the first adjustment mechanism.

[0006] Preferably, the first adjustment mechanism includes a rotating outer sleeve, a lifting sleeve, a connecting piece, and a driving assembly; the rotating outer sleeve is rotatably arranged in the cavity, and a track groove is provided on the side wall of the rotating outer sleeve; the lifting sleeve is arranged on the inner ring side of the rotating outer sleeve, the lifting sleeve is slidably connected to the inner wall of the cavity, and can move up and down in the height direction, and the damping block is arranged at the upper end of the lifting sleeve; the connecting piece is connected to the outer side wall of the lifting sleeve, the connecting piece is arranged in the track groove, and the track groove is configured to drive the connecting piece to move up and down in the height direction; the driving assembly is configured to drive the rotating outer sleeve to rotate.

[0007] Preferably, the trajectory groove includes several horizontal segments and rising segments that are alternately arranged, and the horizontal segments and rising segments are alternately arranged along the circumference of the rotating sleeve. The sum of the lengths of the projections of the several rising segments in the height direction is equal to the lifting height of the damping block.

[0008] Preferably, the driving assembly includes an outer sleeve gear arranged on the rotating outer sleeve, an outer sleeve gear group meshing with the outer sleeve gear for transmission, and a main adjustment shaft for driving the outer sleeve gear group to rotate. The main adjustment shaft is horizontally arranged and passes through the side wall of the gimbal body and extends outside the gimbal body.

[0009] Preferably, the second adjustment mechanism includes a spiral inner sleeve, an inner sleeve gear, an inner sleeve gear set and a fine-tuning shaft; the spiral inner sleeve is arranged on the inner ring side of the lifting sleeve, the spiral inner sleeve is threadedly connected to the lifting sleeve, and the upper end of the spiral inner sleeve has a supporting part for supporting the damping block; the inner sleeve gear is fixedly sleeved on the supporting part; the inner sleeve gear set is arranged on one side of the lifting sleeve and meshes with the inner sleeve gear for transmission; the fine-tuning shaft is used to drive the inner sleeve gear set to rotate, and the fine-tuning shaft is horizontally arranged and passes through the side wall of the gimbal body and extends to the outside of the gimbal body.

[0010] Preferably, the damping block is slidably connected to the side wall of the cavity, and the damping block is rotatably arranged on the supporting portion.

[0011] Preferably, the outer sleeve gear set includes an outer sleeve transmission gear meshing with the outer sleeve gear for transmission, an outer sleeve transmission sleeve shaft fixedly connected to the outer sleeve transmission gear, a first outer sleeve transmission bevel gear fixedly set on the outer sleeve transmission sleeve shaft, and a second outer sleeve transmission bevel gear fixedly set on the main adjustment shaft, and the first outer sleeve transmission bevel gear meshes with the second outer sleeve transmission bevel gear for transmission.

[0012] Preferably, the inner sleeve gear set includes an inner sleeve transmission gear meshing with the inner sleeve gear for transmission, an inner sleeve transmission optical shaft fixedly connected to the inner sleeve transmission gear, a first inner sleeve transmission bevel gear fixedly arranged on the inner sleeve transmission optical shaft, and a second inner sleeve transmission bevel gear fixedly arranged on the fine-tuning shaft, and the first inner sleeve transmission bevel gear meshes with the second inner sleeve transmission bevel gear for transmission.

[0013] Preferably, the main adjustment shaft is a hollow shaft, the inner sleeve transmission optical shaft is inserted into the outer sleeve transmission shaft, and the fine adjustment shaft is inserted into the main adjustment shaft.

[0014] Preferably, a fine-tuning knob is provided on one end of the fine-tuning shaft extending outside the main-tuning shaft, and a main-tuning knob is provided on the main-tuning shaft.

[0015] From the above technical solutions, it can be seen that the pan / tilt connection structure designed in the present invention can achieve the effect of coarse adjustment of the ball joint damping by driving the rotating sleeve to rotate, so that the connecting member can achieve the lifting and lowering action under the action of the track groove, and then drive the lifting sleeve to drive the damping block to lift and lower.

[0016] The design of the horizontal and lifting sections of the track groove decomposes the lifting motion of the damping block into several segments, enabling "gear" adjustment of the ball joint damping. By presetting the height difference of each lifting segment and the transmission ratio between the outer gear and the outer gear group, each gear has a fixed damping change value, thereby quantifying the damping change that can be achieved for each preset angle of rotation of the main adjustment shaft, helping novice users quickly master lens adjustment.

[0017] After completing the coarse adjustment, the user can fine-tune the shaft to drive the inner gear to rotate, and then drive the spiral inner sleeve to rotate. The spiral inner sleeve realizes the lifting movement through the threaded connection between it and the lifting shaft sleeve, and then the height of the damping block can be fine-tuned to achieve the purpose of fine-tuning the damping size based on the coarse adjustment. The tightness of the ball joint is more convenient to adjust. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present invention.

[0019] Figure 2 It is a schematic structural diagram of an embodiment of the present invention from a top view perspective.

[0020] Figure 3 It is a schematic diagram of the trajectory of the track groove of the embodiment of the present invention.

[0021] Explanation of the accompanying drawings: 1. Damping block; 2. First adjusting mechanism; 21. Rotating outer sleeve; 211. Horizontal section; 212. Rising section; 22. Lifting sleeve; 23. Connecting piece; 24. Driving assembly; 241. Outer sleeve gear; 242. Outer sleeve gear set; 2421. Outer sleeve transmission gear; 2422. Outer sleeve transmission sleeve shaft; 2423. First outer sleeve transmission bevel gear; 2424. Second outer sleeve transmission bevel gear; 243. Main adjustment shaft; 3. Second adjusting mechanism; 31. Spiral inner sleeve; 32. Inner sleeve gear; 33. Inner sleeve gear set; 331. Inner sleeve transmission gear; 332. Inner sleeve transmission optical axis; 333. First inner sleeve transmission bevel gear; 334. Second inner sleeve transmission bevel gear; 34. Fine-tuning shaft; 4. Supporting part; 5. Main adjustment knob; 6. Fine-tuning knob. DETAILED DESCRIPTION

[0022] 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 should not be understood as a limitation on the scope of protection of the present invention.

[0023] In the description of this invention, "above," "below," and "within" are understood to be exclusive of the number indicated. The terms "first" and "second" are used solely to distinguish technical features and are not to be construed as indicating or implying relative importance, or as implicitly specifying the number or order of the technical features indicated.

[0024] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0025] In the present invention, unless otherwise expressly defined, terms such as "disposed," "installed," and "connected" should be interpreted broadly. For example, they may refer to direct connection or indirect connection through an intermediate medium; fixed connection or detachable connection or integral molding; mechanical connection; and internal communication between two components or interaction between two components. Those skilled in the art can reasonably determine the specific meanings of these terms in the present invention based on the specific content of the technical solution.

[0026] The following is combined with Figure 1-2 The present invention is described in further detail.

[0027] The embodiment of the present invention discloses a pan / tilt connection structure. Figure 1 The gimbal connection structure includes a gimbal body, a ball joint, a damping block 1, a first adjustment mechanism 2, and a second adjustment mechanism 3; wherein, a cavity is provided in the gimbal body for accommodating components such as the ball joint; the ball joint is provided at the spherical cavity at the upper part of the gimbal body cavity, and is ball-hinged with the gimbal body through the spherical cavity. It should be noted that the ball joint between the ball joint and the gimbal body adopts the structure of a conventional ball joint type gimbal, which will not be described in detail here; the damping block 1 is provided in the cavity, and the damping block 1 has a ball joint circle The ball joint circular surface is used to support the bottom of the ball joint to form a damping effect on the ball joint; the first adjusting mechanism 2 is arranged in the cavity, and is used to drive the damping block 1 to rise and fall, so as to achieve the purpose of coarsely adjusting the damping size of the ball joint; the second adjusting mechanism 3 is arranged on the first adjusting mechanism 2, and can be raised and lowered synchronously with the first adjusting mechanism 2. At the same time, the second adjusting mechanism 3 can drive the damping block 1 to rise and fall, and is used to fine-tune the height of the damping block 1 on the basis of the first adjusting mechanism 2, so as to fine-tune the damping size of the ball joint.

[0028] It can be seen from the above technical solution that the pan-tilt connection structure designed in the present invention can drive the damping block 1 to rise and fall through the first adjustment mechanism 2, coarsely adjust the damping size of the ball joint, and then fine-tune the height of the damping block 1 on the basis of coarse adjustment through the second adjustment mechanism 3, and then fine-tune the damping size of the ball joint. The combination of coarse adjustment and fine adjustment effectively avoids the shortcomings of difficult to grasp the damping size and easy shaking of the lens when adjusting the lens, and is more suitable for novice users.

[0029] Furthermore, in terms of the structural design of the first adjusting mechanism 2 , it includes a rotating outer sleeve 21 , a lifting sleeve 22 , a connecting member 23 , and a driving assembly 24 .

[0030] The rotating sleeve 21 is rotatably installed inside the cavity of the pan-tilt head body, and a track groove is provided on the side wall of the rotating sleeve 21; the lifting sleeve 22 is arranged on the inner ring side of the rotating sleeve 21, and the lifting sleeve 22 is slidably connected to the inner wall of the cavity and can move up and down in the height direction; the damping block 1 is arranged at the upper end of the lifting sleeve 22 and can be raised and lowered synchronously with the lifting sleeve 22; the connecting member 23 is connected to the outer wall of the lifting sleeve 22, and the connecting member 23 is arranged in the track groove, and the track groove is configured to drive the connecting member 23 to move up and down in the height direction; the driving component 24 is configured to drive the rotating sleeve 21 to rotate.

[0031] In the specific design, the rotating installation method of the rotating sleeve 21 can be to rotate it on the side wall of the cavity, or to rotate it on a base. The specific installation structure depends on the design of the pan-tilt head main structure, and there is no specific restriction in the present invention; the upper end of the lifting sleeve 22 can extend to the outside of the upper end of the rotating sleeve 21, and the upper end of the lifting sleeve 22 can overlap the upper end surface of the rotating sleeve 21, and then can be slidably connected to the inner wall of the cavity; in order to facilitate the cooperation between the connecting member 23 and the track groove, the connecting member 23 can adopt a roller, which can effectively reduce the friction between it and the track groove, so that the lifting sleeve 22 moves more smoothly.

[0032] like Figure 1 As shown, the track groove further includes a plurality of alternating horizontal segments 211 and ascending segments 212. The horizontal segments 211 and ascending segments 212 are alternately arranged along the circumference of the rotating sleeve 21. The sum of the projected lengths of the plurality of ascending segments 212 in the height direction is equal to the lifting height of the damping block 1. The alternating arrangement of the horizontal segments 211 and the ascending segments decomposes the movement of the connecting member 23 in the track groove into a plurality of segments, and the height change of the damping block 1 is correspondingly decomposed into a plurality of segments. Furthermore, by presetting the projected length of each ascending segment 212 in the height direction, the change in the damping magnitude of the damping block 1 in each height change can be controlled, thereby effectively controlling the tightness of the ball joint, making it easier for novice users to operate.

[0033] like Figure 1As shown, the drive assembly 24 further includes an outer gear 241 mounted on the rotating outer sleeve 21, an outer gear set 242 meshing with the outer gear 241, and a main adjustment shaft 243 for driving the outer gear set 242. The main adjustment shaft 243 is horizontally disposed, passes through the side wall of the gimbal body, and extends outside the gimbal body. By rotating the main adjustment shaft 243, the user can drive the rotating outer sleeve 21 to rotate, thereby coarsely adjusting the damping value of the ball joint.

[0034] Specifically, the outer gear assembly 242 includes an outer transmission gear 2421 meshing with the outer transmission gear 241, an outer transmission sleeve shaft 2422 fixedly connected to the outer transmission gear 2421, a first outer transmission bevel gear 2423 fixedly mounted on the outer transmission sleeve shaft 2422, and a second outer transmission bevel gear 2424 fixedly mounted on the main adjustment shaft 243. The first outer transmission bevel gear 2423 meshes with the second outer transmission bevel gear 2424. By designing the transmission ratios of the transmission gears in the outer gear assembly 242, the relationship between the number of rotations of the main adjustment shaft 243 and each elevation of the lifting sleeve 22 through one ascending section 212 can be quantified. Furthermore, the relationship between the number of rotations of the main adjustment shaft 243 and the change in the damping value of the ball joint can be quantified, facilitating operation for novice users.

[0035] like Figure 1 As shown, the second adjustment mechanism 3 further includes a spiral inner sleeve 31, an inner sleeve gear 32, an inner sleeve gear set 33, and a fine-tuning shaft 34. The spiral inner sleeve 31 is disposed on the inner ring side of the lifting sleeve 22 and is threadedly connected to the lifting sleeve 22. The upper end of the spiral inner sleeve 31 has a supporting portion 4 for supporting the damping block 1. The damping block 1 is rotatably disposed on the supporting portion 4 and is slidably connected to the side wall of the chamber. The inner sleeve gear 32 is fixedly sleeved on the supporting portion 4. The inner sleeve gear set 33 is disposed on one side of the lifting sleeve 22 and meshes with the inner sleeve gear 32 for transmission. The fine-tuning shaft 34 is used to drive the inner sleeve gear set 33 to rotate. The fine-tuning shaft 34 is horizontally disposed and passes through the side wall of the pan / tilt platform body and extends outside the pan / tilt platform body.

[0036] It should be noted that both the lifting sleeve 22 and the spiral inner sleeve 31 are tubular structures, and the outer wall of the spiral inner sleeve 31 is threadedly connected to the inner wall of the lifting sleeve 22. Therefore, when the lifting sleeve 22 is raised and lowered into position, the inner sleeve gear set 33 and the inner sleeve gear 32 can be rotated by rotating the fine-adjustment shaft 34, thereby driving the spiral inner sleeve 31 to rotate. Since the lifting sleeve 22 itself is slidably connected to the inner wall of the chamber and cannot rotate, the spiral inner sleeve 31 can be raised and lowered in the height direction. The damping block 1 is rotatably connected to the supporting portion 4 of the spiral inner sleeve 31 and slidably connected to the inner wall of the chamber, thereby driving the damping block 1 to rise and fall, thereby achieving the purpose of fine-tuning the damping block 1 based on the first adjustment mechanism 2.

[0037] Specifically, the inner gear assembly 33 includes an inner transmission gear 331 meshing with the inner gear 32, an inner transmission optical axis 332 fixedly connected to the inner transmission gear 331, a first inner transmission bevel gear 333 fixedly mounted on the inner transmission optical axis 332, and a second inner transmission bevel gear 334 fixedly mounted on the fine-tuning shaft 34. The first inner transmission bevel gear 333 meshes with the second inner transmission bevel gear 334. The thickness of the inner transmission gear 331 is greater than that of the inner gear 32, allowing the inner gear 32 to slide relative to the inner transmission gear 331 in the height direction. By designing the thickness difference between the inner transmission gear 32 and the inner transmission gear 331, the inner gear 32 will not disengage from the inner transmission gear 331 when the main adjustment shaft 243 is used to coarsely adjust the damping mass 1. Furthermore, by designing the transmission ratios of the transmission gears in the inner gear assembly 33, the inner gear assembly 33 can be made to move in a decelerated manner, thereby achieving the purpose of fine-tuning the damping.

[0038] Furthermore, the main adjustment shaft 243 is a hollow shaft. The inner transmission shaft 332 is threaded through the outer transmission shaft 2422. The fine adjustment shaft 34 is threaded through the main adjustment shaft 243. The fine adjustment knob 6 is located on the end of the fine adjustment shaft 34 that extends outside the main adjustment shaft 243. The main adjustment knob 5 is located on the main adjustment shaft 243. This design ensures that the inner transmission shaft 332 and the outer transmission shaft 2422, as well as the fine adjustment shaft 34 and the main adjustment shaft 243, are coaxial. This effectively conserves internal space within the gimbal, facilitating the layout of other components. It also places the fine adjustment knob 6 and the main adjustment knob 5 on the same straight line, making them closer together and facilitating user control.

[0039] In summary, the implementation principle of the present invention is that by driving the rotating outer sleeve 21 to rotate, the connecting member 23 is lifted and lowered under the action of the track groove, and then the lifting sleeve 22 is driven to drive the damping block 1 to rise and fall, thereby achieving the effect of coarse adjustment of the ball joint damping;

[0040] At the same time, the design of the horizontal section 211 and the lifting section of the track groove decomposes the lifting motion of the damping block 1 into several sections, realizing the "gear" adjustment of the ball joint damping. By presetting the height difference of each lifting section and the transmission ratio between the outer gear 241 and the outer gear assembly 242, each gear has a fixed damping change value, thereby quantifying the damping change that can be achieved with each preset angle rotation of the main adjustment shaft 243, helping novice users quickly master lens adjustment.

[0041] After completing the coarse adjustment, the user can drive the inner gear 32 to rotate by fine-tuning the rotating shaft 34, thereby driving the spiral inner sleeve 31 to rotate. The spiral inner sleeve 31 realizes the lifting movement through the threaded connection with the lifting shaft sleeve 22, and then the height of the damping block 1 can be fine-tuned to achieve the purpose of fine-tuning the damping size on the basis of coarse adjustment, and the tightness adjustment of the ball joint is more convenient.

[0042] The above are all preferred embodiments of the present invention, and are not intended to limit the scope of protection of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the scope of protection of the present invention.

Claims

1. A pan / tilt connection structure, characterized in that: include: The main body of the platform is provided with a cavity; A ball joint, wherein the ball joint is arranged in the cavity; A damping block (1) is arranged in the cavity, and the damping block (1) has a ball joint circular surface, and the ball joint circular surface is used to support the bottom of the ball joint; A first adjustment mechanism (2) is provided in the cavity and is used to drive the damping block (1) to move up and down; a second adjusting mechanism (3), arranged on the first adjusting mechanism (2), and used for fine-tuning the height of the damping block (1) based on the first adjusting mechanism (2); The first adjustment mechanism (2) comprises a rotating outer sleeve (21), a lifting sleeve (22), a connecting member (23), and a driving assembly (24); The rotating outer sleeve (21) is rotatably disposed in the cavity, and a track groove is provided on the side wall of the rotating outer sleeve (21); The lifting sleeve (22) is arranged on the inner ring side of the rotating outer sleeve (21), the lifting sleeve (22) is slidably connected to the inner wall of the cavity and can move up and down along the height direction, and the damping block (1) is arranged on the upper end of the lifting sleeve (22); The connecting member (23) is connected to the outer side wall of the lifting sleeve (22), and the connecting member (23) is arranged in the track groove, and the track groove is configured to drive the connecting member (23) to move up and down along the height direction; The driving assembly (24) is configured to drive the rotating outer sleeve (21) to rotate; The track groove comprises a plurality of horizontal sections (211) and rising sections (212) that are alternately arranged. The horizontal sections (211) and the rising sections (212) are alternately arranged along the circumference of the rotating outer sleeve (21). The sum of the lengths of the projections of the plurality of rising sections (212) in the height direction is equal to the lifting height of the damping block (1).

2. The pan / tilt connection structure according to claim 1, characterized in that: The driving assembly (24) comprises an outer sleeve gear (241) arranged on the rotating outer sleeve (21), an outer sleeve gear set (242) meshing with the outer sleeve gear (241) for transmission, and a main adjustment shaft (243) for driving the outer sleeve gear set (242) to rotate. The main adjustment shaft (243) is horizontally arranged and passes through the side wall of the pan / tilt platform body and extends outside the pan / tilt platform body.

3. The pan / tilt connection structure according to claim 2, wherein: The second adjustment mechanism (3) comprises a spiral inner sleeve (31), an inner sleeve gear (32), an inner sleeve gear set (33) and a fine-tuning shaft (34); The spiral inner sleeve (31) is arranged on the inner ring side of the lifting sleeve (22), the spiral inner sleeve (31) is threadedly connected to the lifting sleeve (22), and the upper end of the spiral inner sleeve (31) has a supporting portion (4) for supporting the damping block (1); The inner sleeve gear (32) is fixedly sleeved on the supporting portion (4); The inner sleeve gear set (33) is arranged on one side of the lifting sleeve (22) and is meshed with the inner sleeve gear (32) for transmission; The fine-tuning rotating shaft (34) is used to drive the inner sleeve gear set (33) to rotate. The fine-tuning rotating shaft (34) is horizontally arranged and passes through the side wall of the platform body and extends to the outside of the platform body.

4. The pan / tilt connection structure according to claim 3, wherein: The damping block (1) is slidably connected to the side wall of the cavity, and the damping block (1) is rotatably arranged on the supporting portion (4).

5. The pan / tilt connection structure according to claim 3, characterized in that: The outer sleeve gear set (242) includes an outer sleeve transmission gear (2421) meshing with the outer sleeve gear (241) for transmission, an outer sleeve transmission sleeve shaft (2422) fixedly connected to the outer sleeve transmission gear (2421), a first outer sleeve transmission bevel gear (2423) fixedly arranged on the outer sleeve transmission sleeve shaft (2422), and a second outer sleeve transmission bevel gear (2424) fixedly arranged on the main adjustment shaft (243), wherein the first outer sleeve transmission bevel gear (2423) meshes with the second outer sleeve transmission bevel gear (2424) for transmission.

6. The pan / tilt connection structure according to claim 5, characterized in that: The inner sleeve gear set (33) comprises an inner sleeve transmission gear (331) meshing with the inner sleeve gear (32) for transmission, an inner sleeve transmission optical shaft (332) fixedly connected to the inner sleeve transmission gear (331), a first inner sleeve transmission bevel gear (333) fixedly arranged on the inner sleeve transmission optical shaft (332), and a second inner sleeve transmission bevel gear (334) fixedly arranged on the fine-tuning rotating shaft (34). The first inner sleeve transmission bevel gear (333) meshes with the second inner sleeve transmission bevel gear (334) for transmission. The thickness of the inner sleeve transmission gear (331) is greater than that of the inner sleeve gear (32). The inner sleeve gear (32) can slide relative to the inner sleeve transmission gear (331) along a height direction.

7. The pan / tilt connection structure according to claim 6, characterized in that: The main adjustment shaft (243) is a hollow shaft, the inner sleeve transmission optical shaft (332) is inserted into the outer sleeve transmission shaft (2422), and the fine adjustment shaft (34) is inserted into the main adjustment shaft (243).

8. The pan / tilt connection structure according to claim 3, characterized in that: One end of the fine-tuning rotating shaft (34) extending outside the main-tuning rotating shaft (243) is provided with a fine-tuning knob (6), and the main-tuning rotating shaft (243) is provided with a main-tuning knob (5).

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