Anti-deflection center shaft assembly and supporting foot stool

Abstract

The utility model relates to a supporting foot stool which comprises a foot stool body and an anti-deflection center shaft assembly, and the foot stool body serves as a supporting body and can be unfolded to support the supporting foot stool on a supporting face. The anti-deflection center shaft assembly comprises a seat body assembly, a first center shaft, a second center shaft and a locking piece, the first center shaft is rotationally connected to the second center shaft through the seat body assembly, one end of the second center shaft is used for installing photographic equipment, and the second center shaft changes in different shooting directions relative to a rotor of the first center shaft; the relative positions of the first middle shaft and the second middle shaft are fixed through the locking piece so as to maintain different shooting directions, and a circumferential limiting structure is arranged between the seat body assembly and the second middle shaft so as to prevent the second middle shaft from circumferentially rotating at any shooting direction to change the target shooting direction.

Description

Technical Field

[0001] The utility model relates to the technical field of photography, in particular to an anti-deflection central axis component and a supporting tripod. Background Art

[0002] The end of the central axis of the tripod can be installed with a shooting device. In order to make the shooting position flexible and changeable, the central axis is movably arranged on the supporting tripod and can fix the target position of the central axis to realize multi-angle shooting of the user. For example, CN218645170U discloses a tripod that supports horizontal shooting, in which the shooting device is installed at one end of the central axis, the central axis is movably connected to the movable connecting seat, and the movable connecting seat is rotatably connected to the fixed seat, so that the central axis can slide up and down, rotate circumferentially, and swing up and down relative to the supporting tripod, so as to realize multi-angle shooting of the shooting device such as vertical, horizontal, and inclined angles. However, during the movement of the central axis to realize various shooting angles, the central axis cannot always fix its own circumferential rotation, so that the target shooting position required by the user cannot be stabilized. Utility Model Content

[0003] The utility model provides an anti-deflection central axis component and a supporting tripod to solve the technical problem that during the central axis's activities to achieve various shooting angles, the central axis cannot always fix its own circumferential rotation, making it impossible to stabilize the required target shooting orientation.

[0004] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0005] An anti-deflection middle shaft assembly, comprising:

[0006] A seat assembly, comprising a fixed seat and a movable seat connected in rotation, wherein the fixed seat is provided with a first through hole, and the movable seat is provided with a second through hole, and the second through hole is arranged opposite to the first through hole; the movable seat can rotate relative to the fixed seat to stagger the first through hole and the second through hole, and make the angle between the axis of the first through hole and the axis of the second through hole gradually increase;

[0007] A first central axis, one end of which is fixedly connected to the fixing seat, and the first central axis is aligned with the first through hole;

[0008] A second central shaft is movably arranged in the second through hole, one of the second central shaft and the movable seat is provided with a limiting protrusion, and the other is provided with a limiting sliding groove, the limiting protrusion or the limiting sliding groove extends along the axial direction of the second central shaft, the limiting protrusion slides in the limiting sliding groove along the axial direction of the second central shaft, and the limiting protrusion is engaged with the limiting sliding groove in the circumferential direction of the second central shaft;

[0009] A locking member, connected to the movable seat and used to lock the limiting protrusion in the limiting sliding groove;

[0010] Among them, the end of the second central axis is used for installing photographic equipment. When the second through hole is arranged opposite to the first through hole, the locking piece is released, the sliding restriction of the second central axis is released, and the second central axis can extend from the second through hole through the first through hole into the first central axis.

[0011] In one embodiment, the limiting groove or the limiting protrusion extends from one end of the second central axis along its axial direction to the edge of the other end of the second central axis, and the limiting protrusion slides and moves along the axial direction of the second central axis in the limiting groove and can be disengaged from the limiting groove, so that the second central axis can be disengaged from the second through hole.

[0012] In one embodiment, the axial length of the limiting groove along the second central axis is greater than the axial length of the limiting protrusion along the second central axis, and the limiting groove is provided with a first blocking wall and a second blocking wall at both axial ends of the second central axis, and the first blocking wall and the second blocking wall are used to prevent the limiting protrusion from escaping from the limiting groove during sliding; or, the axial length of the limiting groove along the second central axis is less than the axial length of the limiting protrusion along the second central axis, and the limiting protrusion is provided with a first blocking wall and a second blocking wall at both axial ends of the second central axis, and the first blocking wall and the second blocking wall are used to prevent the limiting protrusion from escaping from the limiting groove during sliding.

[0013] In one of the embodiments, the movable seat includes a locking ring, the second through hole is formed in the locking ring, and the locking ring is sleeved on the outside of the second central axis; the edge of the locking ring is provided with a slit opening connected to the second through hole, and the locking ring is provided with opposite first and second lugs on both sides of the slit opening in the circumferential direction; the locking member includes a pull button, a first shaft and a second shaft, the first shaft is connected to the second shaft after passing through the first lug and the second lug, the pull button is connected to the second shaft, a cam is provided on the side of the pull button facing the second lug, and the pull button rotates relative to the first shaft with the second shaft as the rotation axis; the cam can drive the second lug to be squeezed close to the first lug when the pull button rotates forward, so that the slit opening becomes smaller, so as to reduce the radial size of the second through hole; the cam can also synchronize the pull button with the reverse rotation, and the second lug returns to its reverse position and moves away from the first lug, so that the slit opening becomes larger.

[0014] In one embodiment, the movable seat also includes a clamping ring, which is an elastic ring. The clamping ring is in contact with the inner side of the locking ring and is circumferentially limited with the locking ring. The limiting protrusion or the limiting groove is formed on the inner side wall of the clamping ring.

[0015] In one embodiment, the clamping ring is provided with a plurality of first notches and a plurality of second notches, the first notch extending axially from the inner side of the clamping ring to one end edge of the clamping ring, the second notch extending axially from the inner side of the clamping ring to the other end edge of the clamping ring, the first notch and the second notch being arranged alternately and spaced along the circumference of the clamping ring; the limiting protrusion or the limiting groove arranged on the clamping ring is located between the first notch and the second notch; the outer side wall of the clamping ring is further provided with a positioning block located between the first notch and the second notch, and the inner side wall of the locking ring is provided with a positioning groove; or, the outer side wall of the clamping ring is further provided with a positioning groove located between the first notch and the second notch, and the inner side wall of the locking ring is provided with a positioning block; the positioning block engages with the positioning groove.

[0016] In one embodiment, the movable seat includes a locking ring, the second through hole is formed in the locking ring, and the locking ring is sleeved on the outside of the second central axis; the locking member includes a connected rotary cover and a screw, and the screw passes through the locking ring along the radial thread of the locking ring and abuts against the outer wall of the second central axis. Rotating the rotary cover simultaneously drives the screw to move closer to the center of the second central axis along the radial direction of the locking ring to increase the abutment force of the screw on the second central axis; rotating the rotary cover in the opposite direction can drive the screw away from the center of the second central axis and reduce the abutment force of the screw on the second central axis.

[0017] In one of the embodiments, the movable seat also includes a clamping ring, which is an elastic member. The clamping ring is tightly attached to the inner side of the locking ring and is circumferentially limited with the locking ring, and the limiting protrusion or the limiting groove is formed on the inner side wall of the clamping ring; the screw rod passes through the locking ring and the clamping ring in sequence along the radial direction of the locking ring and then abuts against the outer side wall of the second central axis.

[0018] In one embodiment, the movable seat is rotatably connected to the fixed seat via a first rotating shaft, the first rotating shaft is perpendicular to the axial direction of the first central axis, and the first rotating shaft is perpendicular to the axial direction of the second central axis.

[0019] In a second aspect, the utility model also provides a support stand, comprising:

[0020] The tripod body comprises a base and a plurality of legs, one end of each of the legs is rotatably connected to the base, and the other end is supported on a supporting surface, and the base is provided with a third through hole along its thickness direction;

[0021] In the anti-deflection central axis assembly as described in any of the foregoing embodiments, the first central axis is movably disposed in the base, and the first through hole is aligned and connected to the third through hole.

[0022] It can be seen from the above technical solutions that the embodiments of the utility model have at least the following advantages and positive effects:

[0023] The utility model provides a supporting tripod, comprising a tripod body and an anti-deflection center axis assembly that are movably connected. The tripod body serves as a supporting body and can be unfolded to support the supporting tripod on a supporting surface. The anti-deflection center axis assembly comprises a seat assembly, a first center axis, a second center axis and a locking member. The first center axis is movably connected to the second center axis through the seat assembly, and the second center axis rotates or moves relative to the first center axis to change between different shooting orientations. Specifically, the seat assembly comprises a rotatably connected fixed seat and a movable seat, the fixed seat is provided with a first through hole, the movable seat is provided with a second through hole, the first center axis is aligned with the first through hole, the second center axis is movably inserted into the second through hole and one end of the second center axis is used to install photographic equipment; a circumferential limiting structure is provided between the second center axis and the movable seat to prevent the second center axis from rotating relative to the movable seat during the rotation or movement of the second center axis relative to the first center axis; the locking member is connected to the movable seat, and is used to lock the second center axis to the movable seat to further stabilize the shooting angle of the photographic equipment. That is, this solution not only realizes the change between different shooting angles through the flexible design of the central axis (the first central axis and the second central axis), but also the circumferential rotation of the second central axis relative to the movable seat is always limited by the limiting structure during the rotation or movement of the second central axis relative to the first central axis, thereby further stabilizing the shooting angle and orientation. In this way, the practicality of the support tripod is increased to meet more shooting needs of users. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0025] Figure 1 This is a schematic diagram of the structure of the support stand in the first embodiment of the utility model;

[0026] Figure 2 for Figure 1 A schematic diagram of the structure of the support tripod when the anti-deflection center shaft assembly is in a horizontal position;

[0027] Figure 3 for Figure 1 A schematic diagram of the structure of the anti-deflection central axis assembly in the supporting tripod is shown in a vertical position;

[0028] Figure 4 for Figure 3 A schematic diagram of the structure in which the second center shaft of the anti-deflection center shaft assembly is exposed;

[0029] Figure 5 for Figure 2 The structural schematic diagram of the anti-deflection center shaft assembly shown is in a horizontal state;

[0030] Figure 6 for Figure 5 A partial structural schematic diagram of the anti-deflection center shaft assembly shown;

[0031] Figure 7 for Figure 5 A schematic diagram of a partial exploded structure of the anti-deflection center shaft assembly shown;

[0032] Figure 8 for Figure 5 A schematic diagram of a partial exploded structure of the anti-deflection center shaft assembly shown;

[0033] Fig. 9 for Figure 5 A schematic diagram of the structure of a clamping ring of an anti-deflection center shaft assembly is shown;

[0034] Fig.10 It is a structural schematic diagram of a second embodiment of a locking member in an anti-deflection central shaft assembly of the present application.

[0035] The following are the descriptions of the reference numerals:

[0036] 1. Support tripod;

[0037] 10. tripod body; 101. base; 102. legs; 103. third through hole;

[0038] 20, anti-deflection center axis assembly; 100, first center axis; 200, second center axis; 210, limiting slide groove; 300, seat assembly; 310, fixed seat; 311, first through hole; 312, first tooth; 320, movable seat; 321, second through hole; 322, second tooth; 323, limiting protrusion; 324, locking ring; 325, gap; 326, first lug; 327, second lug; 328, positioning groove; 330, first rotating shaft; 340, clamping ring; 340a, elastic ring; 341, first notch; 342, second notch; 343, positioning block; 400, locking member; 410, lever locking member; 411, lever; 412, first shaft; 413, second shaft; 414, cam; 415, spring; 420, threaded locking member; 421, screw cap; 422, screw; 510, first blocking wall; 520, second blocking wall. DETAILED DESCRIPTION

[0039] Typical embodiments that embody the features and advantages of the present invention will be described in detail in the following description. It should be understood that the present invention can have various changes in different embodiments without departing from the scope of the present invention, and the descriptions and illustrations therein are essentially for illustrative purposes rather than for limiting the present invention.

[0040] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0041] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "disposed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0042] Combined with reference Figure 1 and Figure 2 The utility model provides a supporting tripod 1 that is convenient for adjusting the shooting direction, including a tripod body 10 and an anti-deflection center axis assembly 20. The tripod body 10 serves as a supporting body, and the anti-deflection center axis assembly 20 is used to install photographic equipment and is movably connected to the tripod body 10, wherein the photographic equipment may be, but is not limited to, a camera, a smart phone, a tablet computer, etc. The anti-deflection center axis assembly 20 of the present application is flexibly connected to the tripod body 10, and the anti-deflection center axis assembly 20 can rotate and move relative to the tripod body 10. First, the anti-deflection center axis assembly 20 can switch between a vertical state and a horizontal state relative to the tripod body 10, Figure 1 It is shown that when the anti-deflection central axis assembly 20 is in a vertical state, the photographic device can take photos in a vertical direction; Figure 2 It is shown that the anti-deflection center axis assembly 20 is in a horizontal position, at which time the photographic equipment can shoot in a horizontal direction to increase the shooting angle. Secondly, the anti-deflection center axis assembly 20 can reciprocate at different heights relative to the tripod body 10 to adjust the shooting height; in addition, in a horizontal position at the same shooting height, the anti-deflection center axis assembly 20 can also move left and right relative to the tripod body 10 to adjust different shooting directions.

[0043] refer to Figure 2The tripod body 10 includes a base 101 and a plurality of legs 102. The base 101 is provided with a third through hole 103 along its thickness direction. One end of the plurality of legs 102 is rotatably connected to the base 101 and is evenly distributed around the third through hole 103. The other ends of the plurality of legs are supported on a support surface or other supporting devices. The ends of the plurality of legs 102 away from the base 101 can move away from and approach each other so that the tripod body 10 can switch between the unfolded state and the retracted state. The anti-deflection central axis assembly 20 includes a first central axis 100 and a second central axis 200 that are flexibly connected. The first central axis 100 is used to flexibly pass through the base 101. At this time, the central axis of the first central axis 100 is aligned with the third through hole 103. The second central axis 200 is used to install the shooting equipment and the second central axis 200 can rotate and move relative to the first central axis 100. In this way, the second central axis 200 can rotate and move relative to the tripod body 10 to change different shooting orientations.

[0044] Combined with reference Figure 3 and Figure 4 When the anti-deflection central axis assembly 20 is in a vertical state, the axis of the first central axis 100 coincides with the axial direction of the second central axis 200, and the second central axis 200 moves relative to the first central axis 100 along its axial direction to change the shooting height. Figure 2 In the embodiment, the first central axis 100 can also move relative to the tripod body 10 along its axial direction to change the shooting angle, so the maximum shooting height dimension of the photographic equipment provided by the present solution is the state in which the tripod body 10, the first central axis 100 and the second central axis 200 move relative to each other end to end. Moreover, the second central axis 200 can extend into and be hidden in the first central axis 100 during the movement, that is, the first central axis 100 and the second central axis 200 can form a telescopic rod state.

[0045] Combination Figure 4 and Figure 5, during the process of the second central axis 200 rotating to the horizontal state relative to the first central axis 100, the angle between the axis of the second central axis 200 and the axis of the first central axis 100 gradually increases, from 0° to 90°. Specifically, the anti-deflection central axis assembly 20 also includes a seat assembly 300, and the seat assembly 300 includes a rotatably connected fixed seat 310 and a movable seat 320, the fixed seat 310 is provided with a first through hole 311, and the movable seat 320 is provided with a second through hole 321, one end of the first central axis 100 is fixedly connected to the fixed seat 310, and the first central axis 100 is aligned with the first through hole 311 along its axial direction; the second central axis 200 is movably arranged in the second through hole 321, and the movable seat 320 is sleeved on the second central axis 200 and moves relative to the second central axis 200 along the axial direction of the second central axis 200. When the anti-deflection central axis assembly 20 is in a vertical state, the movable seat 320 is stacked on the fixed seat 310, and the first through hole 311 is opposite to the second through hole 321. The movable seat 320 can rotate relative to the fixed seat 310 to stagger the first through hole 311 and the second through hole 321, and gradually increase the angle between the axis of the first through hole 311 and the axis of the second through hole 321, thereby changing the angle between the axis of the first central axis 100 and the axis of the second central axis 200, thereby changing the shooting orientation.

[0046] refer to Figure 6 , the second central axis 200 is provided with a movable seat 320, the outer side wall of the second central axis 200 is provided with a limiting slide groove 210 along its axial direction, the movable seat 320 is provided with a limiting protrusion 323 extending along the axial direction of the second central axis 200, the limiting protrusion 323 slides in the limiting slide groove 210 along the axial direction of the second central axis 200, and the limiting protrusion 323 is engaged with the limiting slide groove 210 in the circumferential direction of the second central axis 200, so that the circumferential limit between the second central axis 200 and the movable seat 320 is achieved. It should be understood that in other embodiments, the limiting protrusion 323 can be provided on the outer side wall of the second central axis 200 and extend along its axial direction, and the limiting slide groove 210 is provided in the movable seat 320 and extends along the axial direction of the second central axis 200, so that the circumferential limit between the second central axis 200 and the movable seat 320 can also be achieved. In addition, in all embodiments, it is only necessary to ensure that at least one of the limiting protrusion 323 and the limiting sliding groove 210 extends along the axial direction of the second central axis 200 .

[0047] The anti-deflection central axis assembly 20 further includes a locking member 400 , which is connected to the movable seat 320 and is used to lock the limiting protrusion 323 in the limiting sliding groove 210 to prevent the second central axis 200 from sliding relative to the movable seat 320 along its axial direction. Figure 4It is illustrated that when the movable seat 320 rotates to the point where the second through hole 321 is arranged opposite to the first through hole 311 , the locking member 400 is released, the sliding restriction of the second central axis 200 is released, and the second central axis 200 can extend from the second through hole 321 through the first through hole 311 into the first central axis 100 .

[0048] The utility model provides a support tripod 1, comprising a tripod body 10 and an anti-deflection middle axis assembly 20 that are movably connected. The tripod body 10 is used as a support body and can be unfolded to support the support tripod 1 on a support surface. The anti-deflection middle axis assembly 20 comprises a first middle axis 100, a second middle axis 200, a seat assembly 300, and a locking member 400. The first middle axis 100 is movably connected to the second middle axis 200 through the seat assembly 300. The second middle axis 200 rotates or moves relative to the first middle axis 100 to change between different shooting orientations. Specifically, the seat body assembly 300 includes a fixed seat 310 and a movable seat 320 that are rotatably connected. The fixed seat 310 is provided with a first through hole 311, and the movable seat 320 is provided with a second through hole 321. The first central axis 100 is aligned with the first through hole 311, and the second central axis 200 is movably inserted into the second through hole 321, and one end of the second central axis 200 is used to install photographic equipment; a circumferential limiting structure is provided between the second central axis 200 and the movable seat 320 to prevent the second central axis from rotating relative to the movable seat 320 during the rotation or movement of the second central axis 200 relative to the first central axis 100; a locking member 400 is connected to the movable seat 320, and is used to lock the second central axis 200 to the movable seat 320 to further stabilize the shooting angle of the photographic equipment. This solution not only realizes the change between different shooting angles through the flexible design of the central axis (the first central axis 100 and the second central axis 200), but also the circumferential rotation of the second central axis 200 relative to the movable seat 320 is always limited by the limiting structure during the rotation or movement of the second central axis 200 relative to the first central axis 100, thereby further stabilizing the shooting angle and orientation. In this way, the practicality of the support tripod is increased to meet more shooting needs of users.

[0049] Combined with reference Figure 7 and Figure 8 The movable seat 320 is rotatably connected to the edge of the fixed seat 310 via the first rotating shaft 330. During the movement of the movable seat 320 relative to the fixed seat 310, the first rotating shaft 330 is always perpendicular to the axial direction of the first central axis 100, and the first rotating shaft 330 is always perpendicular to the axial direction of the second central axis 200. Figure 8In the embodiment, a plurality of first teeth 312 are arranged on the side of the fixed seat 310, and the plurality of first teeth 312 are arranged at intervals along the circumferential direction of the side of the fixed seat 310, and the direction of the plurality of first teeth 312 also extends along the radial direction of the fixed seat 310, and at the same time, a plurality of second teeth 322 are also arranged on the side of the movable seat 320, and the plurality of second teeth 322 are arranged at intervals along the circumferential direction of the side of the movable seat 320, and the direction of the plurality of second teeth 322 also extends along the radial direction of the movable seat 320. When the movable seat 320 is rotatably connected with the fixed seat 310, the movable seat 320 can be driven so that the movable seat 320 is close to the fixed seat 310, so that the plurality of first teeth 312 are aligned and assembled with the plurality of second teeth 322, and at this time, the side of the first teeth 312 abuts against the side of the second teeth 322 to limit the rotation of the movable seat 320 relative to the fixed seat 310. At the same time, the movable seat 320 can also be away from the fixed seat 310 to release the mutual contact between the first gear 312 and the second gear 322, so that the movable seat 320 can rotate relative to the fixed seat 310. It should be understood that in other embodiments, firstly, the axial direction of the first rotating shaft 330 is not limited; secondly, the cooperation between the first gear 312 and the second gear 322 is only to limit the relative rotation between the fixed seat 310 and the movable seat 320. In other embodiments, other circumferential rotation limiting methods can also be used.

[0050] refer to Figure 6 Preferably, the limiting slide groove 210 extends from one end of the second central axis 200 along its axial direction to the other end edge of the second central axis 200, and the limiting protrusion 323 slides and moves along the axial direction of the second central axis 200 in the limiting slide groove 210 and can be separated from the limiting slide groove 210, so that the second central axis 200 can be separated from the second through hole 321 during the movement, and the movable seat 320 is convenient for rotating relative to the fixed seat 310. In this way, the user can fix different shooting orientations by rotating the movable seat 320 first and then inserting the second central axis 200 into the movable seat 320. If the movable seat 320 rotates synchronously with the second central axis 200, the movable seat 320 is loaded (the second central axis 200) and its own rotation is inconvenient. It should be understood that in other embodiments, firstly, when the limiting protrusion 323 is provided on the outer wall of the second central axis 200 and the limiting groove 210 is provided on the movable seat 320, the limiting protrusion 323 extends from one end of the second central axis 200 along its axial direction to the edge of the other end of the second central axis 200, and the limiting groove 210 extends from one end edge of the movable seat 320 along the axial direction of the second central axis 200 to the other end of the movable seat 320, which enables the second central axis 200 to be disengaged from the second through hole 321 during the movement; secondly, without considering whether the movable seat 320 is convenient to rotate, there is no limitation on whether the limiting groove 210 or the limiting protrusion 323 extends to the edge of one end.

[0051] Preferably, the axial length of the limiting groove 210 along the second central axis 200 is greater than the axial length of the limiting protrusion 323 along the second central axis 200 (the limiting groove 210 is arranged on the outer wall of the second central axis 200, and the limiting protrusion 323 is arranged on the movable seat 320), and the limiting groove 210 has a first blocking wall 510 and a second blocking wall 520 at both axial ends of the second central axis 200. The first blocking wall 510 and the second blocking wall 520 are used to prevent the limiting protrusion 323 from disengaging from the limiting groove 210 during the sliding process, so as to prevent the second central axis 200 from disengaging from the movable seat 320 during the movement process of adjusting the shooting orientation. It should be understood that, in other embodiments, first, when the limiting protrusion 323 is provided on the outer side wall of the second central axis 200 and the limiting slide groove 210 is provided on the movable seat 320, the axial length of the limiting slide groove 210 along the second central axis 200 is less than the axial length of the limiting protrusion 323 along the second central axis 200, and the first blocking wall 510 and the second blocking wall 520 are also provided at both ends of the limiting protrusion 323, and the first blocking wall 510 and the second blocking wall 520 are used to prevent the limiting protrusion 323 from being separated from the limiting slide groove 210 during the sliding process, so as to prevent the second central axis 200 from being separated from the movable seat 320 during the movement process of adjusting the shooting orientation. Secondly, without considering that the second central axis 200 is separated from the movable seat 320 during the sliding movement process, whether the first blocking wall 510 and the second blocking wall 520 are provided or not is not limited. In addition, in this embodiment, the first blocking wall 510 and the second blocking wall 520 can be fixedly arranged on the second central axis 200 or the movable seat 320, so that the second central axis 200 cannot be separated from the movable seat 320 along the sliding direction during the sliding process; at least one of the first blocking wall 510 and the second blocking wall 520 can also be removably arranged on the second central axis 200 or the movable seat 320. When the first blocking wall 510 and the second blocking wall 520 are connected to the second central axis 200 or the movable seat 320, the second central axis 200 cannot be separated from the movable seat 320 along the sliding direction during the sliding process; when the first blocking wall 510 and the second blocking wall 520 are removed from the second central axis 200 or the movable seat 320, the second central axis 200 can be separated from the movable seat 320 during the sliding movement.

[0052] Preferably, in this embodiment, combined with reference Figure 6 and Figure 8The movable seat 320 includes a locking ring 324, a second through hole 321 is formed in the locking ring 324, and the locking ring 324 is sleeved on the outer wall of the second central axis 200. The locking member 400 locks the locking ring 324 by buckling the locking member 410. Specifically, the edge of the locking ring 324 is provided with a slit opening 325 connected to the second through hole 321, and the length extension direction of the slit opening 325 is parallel to the axial direction of the locking ring 324. The locking ring 324 is provided with a first lug 326 and a second lug 327 opposite to each other on both sides of the circumferential direction of the slit opening 325. The lever locking member 410 includes a lever 411, a first shaft 412 and a second shaft 413. The first shaft 412 is sequentially inserted into the first lug 326 and the second lug 327 and then connected to the second shaft 413. The lever 411 has a cam 414 on the side facing the second lug 327. The cam 414 is rotatably connected to the first shaft 412 through the second shaft 413. The lever 411 rotates relative to the first shaft 412 with the second shaft 413 as the rotation axis. The second shaft 413 is parallel to the axial direction of the locking ring 324. The cam 414 can drive and squeeze the second lug 327 to approach the first lug 326 when the pull button 411 rotates forward, so that the gap of the slit opening 325 is reduced, thereby reducing the radial size of the second through hole 321, locking the second central axis 200 to the movable seat 320, and limiting the sliding movement of the second central axis 200; the cam 414 can synchronously rotate the pull button 411 in the reverse direction to reduce the squeezing force on the second lug 327 facing the first lug 326, and the second lug 327 returns to the reverse position and moves away from the first lug 326, so that the gap of the slit opening 325 is increased, so as to increase the radial size of the second through hole 321, release the sliding movement of the second central axis 200, and the second central axis 200 slides relative to the movable seat 320. The pull button locking member 410 also includes a spring 415 arranged between the first lug 326 and the second lug 327, and the first shaft 412 is penetrated by the spring 415, and the elastic force released by the spring 415 can help the second lug 327 to return to the reverse position. It should be understood that in other embodiments, firstly, the buckle locking member 410 is only a specific way to lock the locking ring 324 and then lock the second central axis 200, which is convenient and simple to operate. In other embodiments, locking methods such as screws and buckles can also be used. In the second embodiment, the method of locking the second central axis 200 with a screw will be explained in detail; secondly, it should be understood that the buckle locking member 410 does not need to be provided with a spring 415, and the second lug 327 can also return to its reverse position under the drive of the cam 414.

[0053] Preferably, in this embodiment, combined with reference Figure 6 and Fig. 9The movable seat 320 further includes a clamping ring 340, which is an elastic ring 340a. The clamping ring 340 is sleeved between the locking ring 324 and the second central axis 200. The clamping ring 340 is in contact with the inner side of the locking ring 324 and is circumferentially limited with the locking ring 324. The limiting protrusion 323 (or the limiting groove 210) is formed on the inner side wall of the clamping ring 340. Here, the clamping ring 340 is used to separate the inner side wall of the locking ring 324 from the outer side wall of the second central axis 200, thereby avoiding direct contact between the second central axis 200 and the inner side wall of the locking ring 324 (the second through hole 321), reducing the contact wear between the second central axis 200 and the locking ring 324. As a part of the movable seat 320, the locking ring 324 prolongs the service life of the movable seat 320. Then, the clamping ring 340 is an elastic ring 340a, which is made of elastic material. When the locking member 400 locks the locking ring 324, the elastic ring 340a further compresses and locks the second central axis 200. The elastic force released by the elastic ring 340a increases the extrusion force on the outer wall of the second central axis 200, thereby increasing the locking force of the second central axis 200. It should be understood that in other embodiments, without considering the wear of the locking ring 324 and the second central axis 200, the clamping ring 340 may not be provided, and the second central axis 200 is directly penetrated by the locking ring 324 (the second through hole 321); secondly, the clamping ring 340 may not be the elastic ring 340a, but may be other non-elastic rings.

[0054] Preferably, reference Fig. 9In this embodiment, the clamping ring 340 is provided with a plurality of first notches 341 and second notches 342, and the extension directions of the first notches 341 and the second notches 342 are opposite to each other. Specifically, the first notches 341 extend from the inner side of the clamping ring 340 to one end edge of the clamping ring 340, and the second notches 342 extend from the inner side of the clamping ring 340 to the other end edge of the clamping ring 340. The first notches 341 and the second notches 342 are alternately spaced and evenly arranged along the circumference of the clamping ring 340. In addition, the aforementioned limiting protrusion 323 (or limiting slide groove 210) provided on the clamping ring 340 is provided between the first notch 341 and the second notch 342. Here, the first notch 341 and the second notch 342 are provided to increase the elasticity of the clamping ring 340 itself and increase the locking force of the second central axis 200 on the one hand; and to reduce the contact area between the clamping ring 340 and the second central axis 200 on the other hand, and reduce the sliding damping and contact wear between the two; and to reduce the contact area between the clamping ring 340 and the locking ring 324, and reduce the contact wear between the two. It should be understood that, firstly, without considering the above locking force, contact wear, and sliding damping, in other embodiments, the clamping ring 340 may not have the first notch 341 and the second notch 342; secondly, the limiting protrusion 323 (or the limiting slide 210) is provided in the first notch 341 and the second notch 342 to increase the balance of the radial abutment force of the clamping ring 340, and in other embodiments, the setting position of the limiting protrusion 323 (or the limiting slide 210) is not limited.

[0055] Preferably, in this embodiment, combined with reference Figure 8 and Fig. 9 , the outer wall of the clamping ring 340 is provided with a positioning block 343, which is located between the first notch 341 and the second notch 342, and the number of the positioning block 343 is not limited; the inner wall of the locking ring 324 is provided with a corresponding positioning groove 328, the number of which is the same as the positioning block 343, and the positioning block 343 is engaged with the positioning groove 328 along the radial direction of the locking ring 324, so as to achieve the circumferential limit between the locking ring 324 and the clamping ring 340, and limit the circumferential relative rotation of the two. Here, the setting positions of the positioning block 343 and the positioning groove 328 are swapped, and the two are aligned and engaged, and the circumferential limit between the locking ring 324 and the clamping ring 340 can still be achieved. It should be understood that, first of all, the aligned and engaged positioning block 343 and positioning groove 328 are only a specific implementation method for achieving circumferential limit. In other embodiments, the positioning block 343 and the positioning groove 328 are not required, and circumferential limit methods such as meshing and annular grooves can also be adopted. Secondly, there is no limitation on the location of the positioning block 343 , and it only needs to be located on the outer wall of the clamping ring 340 .

[0056] Second embodiment of the anti-deflection center shaft assembly

[0057] The structure of the anti-deflection central shaft assembly 20 in this embodiment is basically the same as that of the first embodiment, except that the locking method of the locking member 400 is different. Fig.10 The locking member 400 locks the locking ring 324 through the threaded locking member 420. The threaded locking member 420 includes a rotary cover 421 and a screw 422. The screw 422 radially penetrates the locking ring 324 and abuts against the outer wall of the second central axis 200. When the rotary cover 421 is rotated, the screw 422 is driven to move closer to the center of the second central axis 200 along the radial direction of the locking ring 324 to increase the abutment force of the screw 422 on the second central axis 200 and limit the sliding movement of the second central axis 200. When the rotary cover 421 is rotated in the opposite direction, the rotary cover 421 drives the screw 422 to rotate away from the center of the second central axis 200, reducing the abutment force of the screw 422 on the second central axis 200 to release the sliding movement restriction of the second central axis 200. In addition, the movable seat 320 includes a clamping ring 340. The clamping ring 340 of this embodiment has basically the same structure and function as the clamping ring 340 of the first embodiment. The difference is that the screw 422 will penetrate the locking ring 324 and the clamping ring 340 in sequence along the radial direction of the locking ring 324 and then abut against the outer wall of the second central axis 200.

[0058] Although the utility model has been described with reference to several typical embodiments, it should be understood that the terms used are illustrative and exemplary, rather than restrictive. Since the utility model can be implemented in a variety of forms without departing from the spirit or essence of the utility model, it should be understood that the above-mentioned embodiments are not limited to any of the aforementioned details, but should be widely interpreted within the spirit and scope defined by the attached claims, so all changes and modifications falling within the scope of the claims or their equivalents should be covered by the attached claims.

Claims

1. An anti-deflection central shaft assembly, characterized in that: include: A seat assembly, comprising a fixed seat and a movable seat connected in rotation, wherein the fixed seat is provided with a first through hole, and the movable seat is provided with a second through hole, and the second through hole is arranged opposite to the first through hole; the movable seat can rotate relative to the fixed seat to stagger the first through hole and the second through hole, and make the angle between the axis of the first through hole and the axis of the second through hole gradually increase; A first central axis, one end of which is fixedly connected to the fixing seat, and the first central axis is aligned with the first through hole; A second central shaft is movably arranged in the second through hole, one of the second central shaft and the movable seat is provided with a limiting protrusion, and the other is provided with a limiting sliding groove, the limiting protrusion or the limiting sliding groove extends along the axial direction of the second central shaft, the limiting protrusion slides in the limiting sliding groove along the axial direction of the second central shaft, and the limiting protrusion is engaged with the limiting sliding groove in the circumferential direction of the second central shaft; A locking member, connected to the movable seat and used to lock the limiting protrusion in the limiting sliding groove; Among them, the end of the second central axis is used for installing photographic equipment. When the second through hole is arranged opposite to the first through hole, the locking piece is released, the sliding restriction of the second central axis is released, and the second central axis can extend from the second through hole through the first through hole into the first central axis.

2. The anti-deflection center shaft assembly according to claim 1, characterized in that: The limiting groove or the limiting protrusion extends from one end of the second central axis along its axial direction to the edge of the other end of the second central axis, and the limiting protrusion slides and moves along the axial direction of the second central axis in the limiting groove and can be disengaged from the limiting groove, so that the second central axis can be disengaged from the second through hole.

3. The middle shaft assembly according to claim 1, characterized in that: The axial length of the limiting slide groove along the second central axis is greater than the axial length of the limiting protrusion along the second central axis, and the limiting slide groove is provided with a first blocking wall and a second blocking wall at both axial ends of the second central axis, and the first blocking wall and the second blocking wall are used to prevent the limiting protrusion from escaping from the limiting slide groove during sliding; or, the axial length of the limiting slide groove along the second central axis is less than the axial length of the limiting protrusion along the second central axis, and the limiting protrusion is provided with a first blocking wall and a second blocking wall at both axial ends of the second central axis, and the first blocking wall and the second blocking wall are used to prevent the limiting protrusion from escaping from the limiting slide groove during sliding.

4. The middle shaft assembly according to claim 1, characterized in that: The movable seat includes a locking ring, the second through hole is formed in the locking ring, and the locking ring is sleeved on the outside of the second central axis; the edge of the locking ring is provided with a slit opening connected to the second through hole, and the locking ring is provided with a first lug and a second lug opposite to each other on both sides of the slit opening in the circumferential direction; the locking member includes a pull button, a first shaft and a second shaft, the first shaft is connected to the second shaft after passing through the first lug and the second lug, the pull button is connected to the second shaft, a cam is provided on the side of the pull button facing the second lug, and the pull button rotates relative to the first shaft with the second shaft as the rotation axis; the cam can drive the second lug to be squeezed close to the first lug when the pull button rotates forward, so that the slit opening becomes smaller, so as to reduce the radial size of the second through hole; the cam can also synchronize the pull button with the reverse rotation, and the second lug returns to its reverse position and moves away from the first lug, so that the slit opening becomes larger.

5. The middle shaft assembly according to claim 4, characterized in that: The movable seat also includes a clamping ring, which is an elastic ring. The clamping ring is in contact with the inner side of the locking ring and is circumferentially limited with the locking ring. The limiting protrusion or the limiting groove is formed on the inner side wall of the clamping ring.

6. The middle shaft assembly according to claim 5, characterized in that: The clamping ring is provided with a plurality of first notches and a plurality of second notches, the first notch extending axially from the inner side of the clamping ring to one end edge of the clamping ring, the second notch extending axially from the inner side of the clamping ring to the other end edge of the clamping ring, the first notch and the second notch being arranged alternately and spaced along the circumference of the clamping ring; the limiting protrusion or the limiting sliding groove arranged on the clamping ring is located between the first notch and the second notch; the outer side wall of the clamping ring is also provided with a positioning block located between the first notch and the second notch, and the inner side wall of the locking ring is provided with a positioning groove; or, the outer side wall of the clamping ring is also provided with a positioning groove located between the first notch and the second notch, and the inner side wall of the locking ring is provided with a positioning block; the positioning block engages with the positioning groove.

7. The anti-deflection midshaft assembly according to claim 1, characterized in that: The movable seat includes a locking ring, the second through hole is formed in the locking ring, and the locking ring is sleeved on the outside of the second central axis; the locking member includes a connected rotary cover and a screw, and the screw passes through the locking ring along the radial thread of the locking ring and abuts against the outer wall of the second central axis. Rotating the rotary cover simultaneously drives the screw to move closer to the center of the second central axis along the radial direction of the locking ring to increase the abutment force of the screw on the second central axis; rotating the rotary cover in the opposite direction can drive the screw away from the center of the second central axis and reduce the abutment force of the screw on the second central axis.

8. The anti-deflection midshaft assembly according to claim 7, characterized in that: The movable seat also includes a clamping ring, which is an elastic member. The clamping ring is tightly attached to the inner side of the locking ring and is circumferentially limited with the locking ring. The limiting protrusion or the limiting groove is formed on the inner side wall of the clamping ring. The screw rod passes through the locking ring and the clamping ring in sequence along the radial direction of the locking ring and then abuts against the outer side wall of the second central axis.

9. The anti-deflection midshaft assembly according to claim 1, characterized in that: The movable seat is rotatably connected to the fixed seat via a first rotating shaft, the first rotating shaft is perpendicular to the axial direction of the first central axis, and the first rotating shaft is perpendicular to the axial direction of the second central axis.

10. A support tripod, characterized in that: include: The tripod body comprises a base and a plurality of legs, one end of each of the legs is rotatably connected to the base, and the other end is supported on a supporting surface, and the base is provided with a third through hole along its thickness direction; According to the anti-deflection central axis assembly as claimed in any one of claims 1 to 9, the first central axis is movably penetrated through the base, and the first through hole is aligned and connected to the third through hole.

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