PTZ and its dynamic balance adjustment structure

Abstract

The present invention relates to a dynamic balance adjustment structure, comprising a main body and a rotating member rotatably connected to the main body, and also comprising at least two groups of balancing components, the balancing components comprising an extrusion component, a shift component, and a resistance component; the resistance component comprises a rotating part and a resistance part; the extrusion component comprises an expansion part and a contraction part distributed along the circumferential direction; the shift component comprises a latch pin which moves radially to engage with the rotating part by means of the extrusion of the expansion part and can drive the rotating part to rotate synchronously, and a retraction elastic element used to reset the latch pin and separate the latch pin from the rotating part; one of the at least two groups of balancing components and the other of them are axially distributed at different positions, the latch pin of one of the at least two groups of balancing components can be individually latched to its corresponding rotating part, and can be simultaneously latched to its respective corresponding rotating part with the latch pin of the other of the at least two groups of balancing components.

Description

Technical Field

[0001] The present invention relates to the technical field of photography, and in particular to a pan head and a dynamic balance adjustment structure thereof. Background Art

[0002] The pan / tilt head is a supporting device for installing and fixing the camera. In actual application, in order to enable the camera to shoot at different angles, the pan / tilt head needs to be able to do pitch movements. The pan / tilt head supports the camera and drives the camera to pitch while doing the pitch movements. In order to enable the camera to be positioned at any pitch angle of the pan / tilt head, there is a pan / tilt head that includes a dynamic balance adjustment structure, which makes it possible to position the corresponding camera at any pitch angle of the pan / tilt head. However, the pan / tilt head of the prior art cannot achieve dynamic balance for cameras of different weights. When the weight of the camera is too low or too high, the pan / tilt head cannot balance the weight of the camera, causing the camera to suddenly look up or down easily. Summary of the invention

[0003] In view of this, the present invention aims to provide a gimbal and a dynamic balance adjustment structure thereof that can solve the above problems or at least solve the above problems to a certain extent.

[0004] To this end, the present invention provides a dynamic balance adjustment structure on one hand, including a main body and a rotating member rotatably connected to the main body, and also including at least two groups of balancing components, the balancing component including an extrusion component rotatable relative to the rotating member, a shift member arranged in the rotating member and radially displaceable relative to the rotating member, and a resistance member arranged between the shift member and the main body; the resistance member includes a rotating part and a resistance part arranged between the rotating part and the main body, when the rotating part rotates relative to the main body or has a tendency to rotate, the resistance part is compressed to generate resistance to prevent the rotating part from rotating; the extrusion member includes a rotating part and a resistance part arranged between the rotating part and the main body, when the rotating part rotates relative to the main body or has a tendency to rotate, the resistance part is compressed to generate resistance to prevent the rotating part from rotating; The invention comprises an expansion part and a contraction part distributed along the circumferential direction, wherein the expansion part protrudes radially outward relative to the contraction part; the shift member comprises a bayonet which moves radially to engage with the rotating part and can drive the rotating part to rotate synchronously with the help of the squeezing of the expansion part, and a de-shifting elastic element which is used to reset the bayonet and separate the bayonet from the rotating part; one of the at least two groups of balancing components and the other of them are distributed at different positions along the axial direction, and the bayonet of one of the at least two groups of balancing components can be engaged with its corresponding rotating part separately, and can be engaged with its respective corresponding rotating part at the same time as the bayonet of the other of the at least two groups of balancing components.

[0005] In some embodiments, the extrusion member is a cam.

[0006] In some embodiments, the shift member also includes a bayonet sleeve sleeved on the periphery of the bayonet, and a shifting elastic element accommodated in the bayonet sleeve and pressing against the bayonet, the bayonet sleeve abuts against the extrusion member, one end of the shift-down elastic element abuts against the bayonet sleeve, and the other end of the shift-down elastic element abuts against the rotating member.

[0007] In some embodiments, the bayonet sleeve includes a detachably connected inner sleeve and an outer sleeve sleeved on the outer circumference of the inner sleeve, one end of one of the inner sleeve and the outer sleeve is open, and the other end forms a limit plate with a through hole, and the bayonet includes a main body portion passing through the through hole, and a flange extending radially outward from the main body portion and abutting against the limit plate.

[0008] In some embodiments, the resistance member further includes a fixing portion disposed between the main body and the resistance portion, the fixing portion being fixed to the main body in a rotationally-resistant manner, and the resistance portion being squeezed between the fixing portion and the rotating portion.

[0009] In some embodiments, the fixing portion and the rotating portion are metal rings, and the resistance portion is a rubber ring.

[0010] In some embodiments, a knob fixedly connected to the extrusion member is further included, the knob can rotate around the axis relative to the rotating member, and the rotating member can drive the knob and the extrusion member to rotate synchronously.

[0011] In some embodiments, the rotating member includes a disk portion located at one end of the main body portion, and a cylinder portion vertically connected to the disk portion, a through hole is formed on a side wall of the cylinder portion, and the shift member is accommodated in the through hole.

[0012] In some embodiments, at least three balancing components are included, and the circumferential lengths of the expansion portions of the at least three balancing components gradually increase or decrease along the axial direction.

[0013] On the other hand, the present invention further provides a pan / tilt platform, comprising the aforementioned dynamic balance adjustment structure.

[0014] The dynamic balance adjustment structure of the present invention can at least achieve that one resistance part or two resistance parts generate resistance at the same time, so that a gear position with a rebound force closer to its weight can be selected for different cameras. Specifically, when the camera is light, one resistance part can be selected to generate resistance to balance the camera, avoiding the "head-up" problem caused by excessive elastic force and too light camera. In addition, a smaller number of resistance parts generate smaller resistance, so that it can be more labor-saving when tilting the camera. When the camera is heavy, two resistance parts can be selected to generate resistance to balance the camera, avoiding the "head-down" problem caused by too small elastic force and too heavy camera. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A three-dimensional schematic diagram of a pan / tilt platform according to an embodiment of the present invention is shown.

[0016] Figure 2 yes Figure 1 A three-dimensional schematic diagram of the dynamic balance adjustment structure of the gimbal shown.

[0017] Figure 3 yes Figure 2 A cross-sectional view of the dynamic balance adjustment structure shown.

[0018] Figure 4 yes Figure 2 An exploded view of the dynamic balance adjustment structure shown.

[0019] Figure 5 yes Figure 4 An exploded view of the dynamic balance adjustment structure shown in another perspective.

[0020] Figure 6 yes Figure 4 A schematic diagram of the three-dimensional structure of the extrusion shaft of the dynamic balance adjustment structure shown.

[0021] Figure 7 yes Figure 6 Another schematic diagram of the three-dimensional structure of the extrusion shaft shown. DETAILED DESCRIPTION

[0022] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments to make the technical solution and beneficial effects of the present invention clearer. It should be understood that the accompanying drawings are only provided for reference and explanation, and are not used to limit the present invention. The dimensions shown in the accompanying drawings are only for the convenience of clear description, and do not limit the proportional relationship.

[0023] refer to Figure 1 and Figure 2 A pan head according to an embodiment of the present invention includes a ball bowl 10, a dynamic balance adjustment structure 20 fixed on the ball bowl 10, and a quick-release plate 11 fixed on the dynamic balance adjustment structure 20. The quick-release plate 11 is used to install a camera. The dynamic balance adjustment structure 20 includes a main body 30 fixed to the ball bowl 10, and a rotating member 40 rotatably connected to the main body 30. The quick-release plate 11 is fixed to the rotating member 40 and can rotate synchronously with the rotating member 40. In this embodiment, a handle 12 is also fixedly connected to the rotating member 40. When the camera is tilted, the handle 12 is rotated, and the handle 12 drives the rotating member 40 to rotate relative to the main body 30, thereby driving the camera mounted on the quick-release plate 11 to tilt.

[0024] refer to Figures 3 to 5As shown, in this embodiment, the main body 30 is in the shape of a cylinder with one end open. The rotating member 40 includes a disk 41 located at the open end of the main body 30, and a cylinder 42 vertically connected to the side wall of the central through hole 410 of the disk 41, and the cylinder 42 is located in the main body 30. The dynamic balance adjustment structure 20 also includes at least two groups of balance components. The balance components include an extrusion member 50 arranged in the cylinder 42 of the rotating member 40 along the axial direction and rotatable relative to the rotating member 40, a shift member 60 arranged in the cylinder 42 of the rotating member 40 along the radial direction and displaceable relative to the rotating member 40, and a resistance member 70 arranged around the cylinder 42 of the rotating member 40 and located between the shift member 60 and the main body 30. In this embodiment, the dynamic balance adjustment structure 20 includes four groups of balance components, and the four groups of balance components are distributed in different positions along the axial direction. It can be understood that in other embodiments, the dynamic balance adjustment structure 20 may also include other numbers of balance components, such as three groups, five groups, etc.

[0025] Combination Figure 6 and Figure 7 As shown, in this embodiment, the extrusion member 50 includes an expansion portion 51 and a contraction portion 52 distributed along the circumferential direction, and the expansion portion 51 protrudes radially outward relative to the contraction portion 52. Preferably, the extrusion member 50 is a cam. In other words, in this embodiment, the expansion portion 51 is an arcuate surface on the radially outer side of the cam, and the contraction portion 52 is the remaining circumferential side surface of the cam except the arcuate surface. More preferably, four extrusion members 50 are integrally formed on an extrusion shaft 53 in sequence along the axial direction. In this way, the extrusion members 50 of all balancing components can be synchronously rotated by only rotating the extrusion shaft 53. The circumferential length of the expansion portion 51 of the four groups of balancing components in this embodiment gradually increases in the direction axially away from the disk portion 41 of the rotating member 40, that is, the central angle corresponding to the four expansion portions 51 gradually increases in the direction axially away from the disk portion 41 of the rotating member 40. Refer again Figure 3 As shown, preferably, a first bearing 54 is further arranged between one end of the extrusion shaft 53 and the rotating member 40. Specifically, one end of the extrusion shaft 53 extends radially outward to form a boss 530. The aperture of the central through hole 410 of the disk portion 41 of the rotating member 40 is larger than the aperture of the barrel portion 42 of the rotating member 40, so that a support platform 420 is formed at the end of the barrel portion 42 facing the disk portion 41. The first bearing 54 is arranged on the support platform 420, and its inner ring is sleeved on the outer periphery of the boss 530 of the extrusion shaft 53, and the outer ring abuts against the radial inner wall of the rotating member 40.

[0026] Reference again Figures 3 to 5As shown, preferably, the dynamic balance adjustment structure 20 in this embodiment also includes a knob 80 fixedly connected to the extrusion member 50, for example, by a screw 81, and the knob 80 protrudes from the disk portion 41 of the rotating member 40. The design of the knob 80 is more conducive to rotating the extrusion shaft 53. In addition, the gears 1 / 2 / 3 / 4 can be marked on the knob 80 corresponding to the expansion portions 51 on the extrusion shaft 53, so that the user can select the desired gear. The knob 80 can rotate relative to the rotating member 40, and the rotating member 40 can drive the knob 80 and the extrusion member 50 to rotate synchronously. Specifically, the central through hole 410 of the disk portion 41 includes a first through hole 411 and a second through hole 412 of different aperture sizes, wherein the apertures of the first through hole 411, the second through hole 412, and the through hole of the barrel portion 42 gradually decrease, so that a support surface 405 is formed at the junction between the first through hole 411 and the second through hole 412. The support surface 405 is formed with a plurality of shallow grooves 413 corresponding to each gear position. The knob 80 is partially received in the first through hole 411, and a plug-in groove 801 is formed on the end surface facing the support surface 405. A connecting member is arranged between the rotating member 40 and the knob 80. The connecting member includes a plug-in column 802 and a glass bead (not shown) connected to one end of the plug-in column 802. The glass bead is received in the shallow groove 413, and the plug-in column 802 is received in the plug-in groove 801. When the knob 80 is rotated relative to the rotating member 40, the knob 80 drives the plug-in column 802 to rotate, and the plug-in column 802 drives the glass bead to slide to the corresponding shallow groove 413, so that the knob 80 is rotated relative to the rotating member 40. When the rotating member 40 is rotated, the rotating member 40 can make the knob 80 rotate synchronously through the connecting member.

[0027] In this embodiment, the shift member 60 includes a bayonet 61 that moves radially outward by means of the extrusion of the expansion portion 51, and a retraction elastic element 62 for resetting the bayonet 61 to move radially inward. Preferably, a through hole is formed on the side wall of the barrel 42 of the rotating member 40, and the shift member 60 is accommodated in the through hole. In this embodiment, the through hole includes an inner hole 64 and an outer hole 65 that are sequentially distributed radially outward, wherein the aperture of the inner hole 64 is larger than the aperture of the outer hole 65, so that a limiting surface for abutting the retraction elastic element 62 is formed at the junction of the inner hole 64 and the outer hole 65. When the extrusion shaft 53 rotates until its expansion portion 51 squeezes the bayonet 61, the bayonet 61 moves radially outward to protrude from the through hole. When the extrusion shaft 53 rotates until its contraction portion 52 is aligned with the bayonet 61, the retraction elastic element 62 resets the bayonet 61 to the through hole. In this embodiment, the gear-reversing elastic element 62 is a compression spring.

[0028] In particular, at least one of the bayonet pins 61 can be individually engaged with the corresponding rotating portion 71 under the pressure of the corresponding expansion portion 51, and the at least one of the bayonet pins 61 can be engaged with the corresponding rotating portion 71 together with another bayonet pin 61. In this embodiment, since the central angles corresponding to the four expansion portions 51 gradually increase in the direction axially away from the disk portion 41 of the rotating member 40, when the knob 80 is rotated from the 1st gear to the 2nd gear, the 3rd gear, and the 4th gear, the first bayonet pin, the second bayonet pin, the third bayonet pin, and the fourth bayonet pin will be engaged with the corresponding rotating portion 71 under the pressure of the corresponding expansion portion 51, and when the knob 80 is rotated to a high gear, the bayonet pin 61 corresponding to the low gear before the high gear still remains engaged with the corresponding rotating portion 71.

[0029] Preferably, the barrel portion 42 of the rotating member 40 includes an annular main body portion 46 and a limiting barrel 44 sleeved outside the main body portion 46. The inner hole 64 is formed in the main body portion 46, and the outer hole 65 is formed in the limiting barrel 44. In this embodiment, one end of the limiting barrel 44 is open, and the other end of the limiting barrel 44 extends radially inward to form an annular fixing ring 45, and the fixing ring 45 is fixedly connected to one end of the main body portion 46, for example, by screws.

[0030] Preferably, the shift member 60 further comprises a bayonet sleeve 69 sleeved on the periphery of the bayonet pin 61, and a gear-engaging elastic element contained in the bayonet sleeve 69 and pressing the bayonet pin 61. The bayonet sleeve 69 abuts against the extrusion member 50, one end of the gear-reducing elastic element 62 abuts against the bayonet sleeve 69, and the other end of the gear-reducing elastic element 62 abuts against the limiting cylinder 44. When the extrusion shaft 53 rotates until its expansion portion 51 squeezes the corresponding bayonet sleeve 69, the bayonet sleeve 69 moves radially outward, and at the same time, the gear-engaging elastic element in the bayonet sleeve 69 presses the bayonet pin 61, so that the bayonet pin 61 as a whole moves radially outward to protrude from the through hole. When the extrusion shaft 53 rotates until its contraction portion 52 is aligned with the bayonet sleeve 69, the gear-reducing elastic element 62 causes the bayonet sleeve 69 to move radially inward, so that the bayonet pin 61 in the bayonet sleeve 69 is reset to the through hole. In this embodiment, the gear-engaging elastic element is a compression spring.

[0031] Preferably, the bayonet sleeve 69 includes a detachably connected inner sleeve 67 and an outer sleeve 68 sleeved on the outer periphery of the inner sleeve 67. The outer sleeve 68 is in the shape of a tube with one end open, and its closed end preferably has a curved surface (such as a hemispherical shape, etc.) for abutting against the extrusion member 50. The inner sleeve 67 is also in the shape of a tube, with one end open and the other end forming a stop plate with a through hole. The bayonet 61 includes a main body 609 through which the through hole is penetrated, and a flange 610 extending radially outward from the main body 609 and abutting against the stop plate. The gear-engaging elastic element abuts between the closed end of the outer sleeve 68 and the flange 610 of the bayonet 61. When assembling the bayonet sleeve 69, the bayonet 61 can be first inserted into the through hole of the inner sleeve 67, so that the flange 610 of the bayonet 61 abuts against the limit plate of the inner sleeve 67 and is limited; then the gear-engaging elastic element is installed in the inner sleeve 67, the gear-reversing elastic element 62 is installed in the inner sleeve 67 and the outer periphery of the bayonet 61, and then the inner sleeve 67 is connected to the outer sleeve 68. Preferably, the inner sleeve 67 and the outer sleeve 68 are fixedly connected by threaded connection.

[0032] The resistance member 70 includes a rotating portion 71 and a resistance portion 72 arranged between the rotating portion 71 and the main body 30. When the bayonet 61 moves to engage with the rotating portion 71, the bayonet 61 can synchronously drive the rotating portion 71 to rotate relative to the main body 30, and the relative movement or relative movement trend between the rotating portion 71 and the main body 30 causes the resistance portion 72 to be compressed and generate resistance to prevent the rotating portion 71 from rotating. When the bayonet 61 is reset, the bayonet 61 is separated from the rotating portion 71. In this embodiment, the radial inner side of the rotating portion 71 is recessed to form two opposite grooves 711 for engaging with the bayonet 61.

[0033] Preferably, the resistance member 70 further comprises a fixing portion 721 arranged between the main body 30 and the resistance portion 72, the fixing portion 721 is fixed to the main body 30 in a rotation-proof manner, and the resistance portion 72 is squeezed between the fixing portion 721 and the rotating portion 71. Specifically, the radial outer side of the fixing portion 721 is formed with two opposite protrusions 722, and the main body 30 is formed with a slot 301 extending along the axial direction corresponding to the protrusions 722, so as to realize the fixing portion 721 being fixed to the main body 30 in a rotation-proof manner. In this embodiment, the fixing portion 721 and the rotating portion 71 are metal rings, and the resistance portion 72 is a rubber ring. When the rotating portion 71 and the fixing portion 721 move relative to each other or have a tendency to move relative to each other, the rubber ring is compressed and generates a reverse elastic force, thereby preventing the rotating portion 71 from rotating, thereby balancing the camera. Preferably, a gasket 75 is also arranged between adjacent rotating portions 71. A gasket 76 is also preferably arranged between adjacent fixing portions 721.

[0034] The dynamic balance adjustment structure 20 in this embodiment further includes a bottom plate 93 fixedly connected to the main body 30, a support plate 90 arranged at one end of the bottom plate 93, and an annular fixing plate 91 fixedly connected to the open end of the main body 30. The fixing plate 91, the support plate 90, and the main body 30 jointly define an annular groove with a radial inner opening for accommodating and positioning the resistance member 70. Preferably, an annular partition plate 911 is formed along the axial direction at one end of the fixing plate 91 near the center hole thereof, and a second bearing 92 is arranged between the annular partition plate 911 and the rotating member 40. Also preferably, the dynamic balance adjustment structure 20 in this embodiment further includes a screw 94, a threaded hole 931 is formed in the center of the bottom plate 93, and the screw 94 sequentially penetrates the knob 80 and the extrusion shaft 53 and is threadedly connected to the threaded hole 931 on the bottom plate 93. Preferably, a plane bearing 95 is arranged between the screw 94 and the screw for fixing the knob 80 and the extrusion shaft 53. Both end surfaces of the plane bearing 95 are axially arranged between the nut of the screw rod 94 and the end surface of the screw rod 94 .

[0035] When assembling the dynamic balance adjustment structure 20 in this embodiment, the main body 30, the bottom plate 93, the support plate 90, the resistance member 70, and the fixed plate 91 can be assembled together as a first component, and the knob 80, the extrusion shaft 53, the rotating member 40, and the shift member 60 can be assembled together as a second component, and then the screw 94 can be passed through the second component until it is threadedly connected to the first component, thereby assembling the first and second components together.

[0036] When in use, the knob 80 is rotated to the corresponding gear position according to the weight of the camera, and the knob 80 drives the extrusion shaft 53 to rotate synchronously. The corresponding expansion part 51 on the extrusion shaft 53 squeezes the corresponding gear member 60, so that the bayonet 61 of the gear member 60 is engaged with the groove of the corresponding rotating part 71. Then the camera is mounted on the quick release plate 11, and the handle 12 is rotated to rotate the rotating member 40 to the required angle. While the rotating member 40 rotates, the camera is driven to pitch to the required angle through the quick release plate 11. During the rotation of the rotating member 40, the rotating member 40 will drive the knob 80, the extrusion shaft 53, and the corresponding gear member 60 to rotate. Since the bayonet 61 of the corresponding gear member 60 is engaged with the corresponding rotating part 71, the rotating part 71 will move relative to the corresponding fixed part 721, thereby squeezing the resistance part 72, and the resistance part 72 will generate the reverse elastic force as described above to balance the rotation of the rotating part 71. When the camera is tilted to a desired angle, when the rotating part 71 tends to rotate relative to the fixed part 721 under the action of the gravity of the camera, the rubber ring is compressed and generates a reverse elastic force, thereby preventing the rotating part 71 from rotating, thereby achieving the effect of fixing the camera at any angle position, that is, achieving dynamic balance.

[0037] In this embodiment, since at least one of the bayonet pins 61 can be individually engaged with its corresponding rotating part 71 under the pressure of its corresponding expansion part 51, and at least one of the bayonet pins 61 can be engaged with its corresponding rotating part 71 at the same time as another bayonet pin 61, this embodiment can at least achieve that one rubber ring or two rubber rings generate rebound force at the same time, so that a gear position with a rebound force closer to its weight can be selected for different cameras. Specifically, when the camera is light, the knob 80 is rotated to a low gear, such as the 1st gear, at this time, the corresponding one bayonet pin 61 is respectively engaged with its corresponding rotating part 71, so only one rubber ring will generate rebound force to balance the camera, avoiding the "head-up" problem caused by excessive elastic force and too light camera. In addition, a smaller number of rubber rings generate smaller rebound force, so it can also save more effort when operating the handle 12 to tilt the camera. When the camera is heavy, rotate the knob 80 to a higher position, such as the 3rd position. At this time, the three latches 61 are respectively engaged with their corresponding rotating parts 71, so that three rubber rings will generate rebound force to balance the camera, avoiding the "head-down" problem caused by too small elastic force and too heavy camera.

[0038] It is worth noting that the following situation may occur during the process of rotating the knob 80 to adjust the gear: when the corresponding cam squeezes the corresponding bayonet 61, the bayonet 61 may not be aligned with the groove of the corresponding rotating part 71. In this case, the gear-engaging elastic element is always in a compressed state until the rotating member 40 rotates to make the bayonet 61 rotate to align with the groove, and the bayonet 61 is engaged in the groove under the action of the gear-engaging elastic element, thereby achieving gear-engaging, that is, the corresponding rubber ring generates a rebound force to balance the weight of the camera.

[0039] The above description is only a preferred specific implementation manner of the present invention, and the protection scope of the present invention is not limited to the embodiments listed above. Any simple change or equivalent replacement of the technical solution that can be obviously obtained by any technician familiar with the technical field within the technical scope disclosed in the present invention falls within the protection scope of the present invention.

Claims

1. A dynamic balance adjustment structure, comprising a main body and a rotating member rotatably connected to the main body, characterized in that: The invention also comprises at least two groups of balancing components, wherein the balancing components comprise an extrusion component rotatable relative to the rotating component, a stopper component arranged in the rotating component and radially displaceable relative to the rotating component, and a resistance component arranged between the stopper component and the main body; the resistance component comprises a rotating part and a resistance part arranged between the rotating part and the main body, and when the rotating part rotates relative to the main body or has a tendency to rotate, the resistance part is compressed to generate resistance to prevent the rotating part from rotating; the extrusion component comprises an expansion part and a contraction part distributed along the circumferential direction, and the extrusion component of the balancing component is integrally formed along the axial direction. An extrusion shaft, wherein the expansion portion protrudes radially outward relative to the contraction portion; the shifting member includes a latch pin which is radially moved to engage with the rotating portion and can drive the rotating portion to rotate synchronously by means of the extrusion of the expansion portion, and a retraction elastic element used to reset the latch pin and separate the latch pin from the rotating portion; one of the at least two groups of balancing components and the other of them are axially distributed at different positions, the latch pin of one of the at least two groups of balancing components can be individually engaged with its corresponding rotating portion, and can be engaged with its respective corresponding rotating portion at the same time as the latch pin of the other of the at least two groups of balancing components.

2. The dynamic balance adjustment structure according to claim 1, characterized in that: The extrusion member is a cam.

3. The dynamic balance adjustment structure according to claim 1, characterized in that: The shifting member also includes a bayonet sleeve sleeved on the periphery of the bayonet, and a shifting elastic element accommodated in the bayonet sleeve and pressing the bayonet, the bayonet sleeve abuts against the extrusion member, one end of the retracting elastic element abuts against the bayonet sleeve, and the other end of the retracting elastic element abuts against the rotating member.

4. The dynamic balance adjustment structure according to claim 3, characterized in that: The bayonet sleeve includes a detachably connected inner sleeve and an outer sleeve sleeved on the outer circumference of the inner sleeve, one end of one of the inner sleeve and the outer sleeve is open, and the other end forms a limit plate with a through hole, and the bayonet includes a main body portion penetrating the through hole, and a flange extending radially outward from the main body portion and abutting against the limit plate.

5. The dynamic balance adjustment structure according to claim 1, characterized in that: The resistance member further includes a fixing portion arranged between the main body and the resistance portion, the fixing portion is fixed to the main body in a rotationally-resistant manner, and the resistance portion is pressed between the fixing portion and the rotating portion.

6. The dynamic balance adjustment structure according to claim 5, characterized in that: The fixing part and the rotating part are metal rings, and the resistance part is a rubber ring.

7. The dynamic balance adjustment structure according to claim 1, characterized in that: It also includes a knob fixedly connected to the extrusion member, the knob can rotate relative to the rotating member, and the rotating member can drive the knob and the extrusion member to rotate synchronously.

8. The dynamic balance adjustment structure according to claim 1, characterized in that: The rotating member includes a disk portion located at one end of the main body portion, and a cylinder portion vertically connected to the disk portion. A through hole is formed on the side wall of the cylinder portion, and the stopper is accommodated in the through hole.

9. The dynamic balance adjustment structure according to claim 1, characterized in that: At least three balancing components are included, and the circumferential lengths of the expansion parts of the at least three balancing components gradually increase or decrease along the axial direction.

10. A pan / tilt head, characterized in that: It comprises a dynamic balance adjustment structure according to any one of claims 1-9.

Images