One-touch operation support legs and tripod stand

Abstract

To provide a one-touch operation type support leg and tripod stand which realizes one-touch release and one-touch fixing of the support leg, is easy to operate, and has a fast adjustment speed. [Solution] The system includes a first section bracket 1, a second section bracket 2, and a third section bracket 3, and the second section bracket is slidable relative to the first section bracket in the longitudinal extension direction of the support leg, and the third section bracket is slidable relative to the second section bracket. An active locking mechanism is provided between the first section bracket and the second section bracket for locking or unlocking the two, and a passive locking mechanism is provided between the second section bracket and the third section bracket for locking or unlocking the two, and an interlocking mechanism 6 is connected between the active locking mechanism and the passive locking mechanism, and the active locking mechanism moves the passive locking mechanism to simultaneously lock or unlock it.

Description

[Technical field]

[0001] The present invention relates to the technical field of photography equipment, and more particularly to a one-touch operation support leg and tripod stand. [Background technology]

[0002] In daily life, a support frame or other equipment is often needed to support a photographic device such as a camera. The support frame includes a number of support legs, each of which is designed to be extendable, thereby facilitating the adjustment of the height of the support frame. Such a telescopic support leg generally has a three-section support rod, and a set of locking mechanisms is provided between the first section support rod and the second section support rod, and between the second section support rod and the third section support rod, and each set of locking mechanisms has an independent lock / unlock switch. To unfold all the support rods on this support leg, two sets of lock / unlock switches need to be turned on, and to unfold the entire support frame, six lock / unlock switches need to be turned on, which is very inconvenient to use. Summary of the Invention [Problem to be solved by the invention]

[0003] Therefore, the technical problem that the present invention aims to solve is to provide a one-touch operation support leg and tripod stand by overcoming the drawbacks of the prior art that the operation of adjusting the height of the support leg is cumbersome and the adjustment speed is relatively slow. [Means for solving the problem]

[0004] In order to solve the above technical problems, the technical solution of the present invention is as follows:

[0005] A one-touch operation support leg including a bracket at a first section, a bracket at a second section, and a bracket at a third section, the bracket at the second section being slidable relative to the bracket at the first section in the longitudinal extension direction of the support leg, the bracket at the third section being slidable relative to the bracket at the second section, an active locking mechanism for locking or unlocking the bracket at the first section and the bracket at the second section being provided between the bracket at the first section and the bracket at the second section, and a passive locking mechanism for locking or unlocking the bracket at the second section and the bracket at the third section being provided between the bracket at the second section and the bracket at the third section, the one-touch operation support leg further including an interlock mechanism connected between the active locking mechanism and the passive locking mechanism, the active locking mechanism moving the passive locking mechanism via the interlock mechanism to simultaneously lock or unlock the passive locking mechanism and the active locking mechanism.

[0006] Further, the bracket of the first section includes at least two first tubes arranged in parallel, the bracket of the second section includes at least two second tubes arranged in parallel, and a first sliding joint and a second sliding joint fixedly connected between the at least two second tubes, and the bracket of the third section includes at least two third tubes arranged in parallel, and the at least two first tubes and the first sliding joint are slidably connected, and the at least two third tubes and the second sliding joint are slidably connected.

[0007] Further, a first through hole is provided on the first sliding joint, and the active locking mechanism includes: A pulling shaft movably inserted in the first through hole; a clamp block located on one side of the first sliding joint and fixedly connected to an end of the tension shaft protruding from the first through hole; an operating member rotatably connected to a side of the first sliding joint away from the clamp block around a pin shaft; a transmission shaft fixedly connected to the other end of the pulling shaft protruding from the first through hole and connected to the operating member in a transmissible manner; When the operating member is rotated, the transmission shaft moves the tension shaft and the clamp block, and the clamp block and the first slide joint cooperate to clamp the first pipe body.

[0008] Furthermore, the operating member is specifically a clamp, which includes a clamp arm and a clamp head that are integrally connected, a groove for accommodating the clamp head is provided on the first sliding joint, the clamp head is rotatably connected on the pin shaft, a C-shaped groove is provided on the clamp head, the distances from the two ends of the C-shaped groove to the rotation axis of the clamp head are different, and the transmission shaft enters the C-shaped groove and can slide in the C-shaped groove.

[0009] Furthermore, a recess is provided inside the plate clamp head, and the plate clamp head includes an upper top wall that serves as the upper wall of the recess and a lower bottom wall that serves as the lower wall of the recess, the upper top wall and the lower bottom wall both have the C-shaped grooves, the transmission shaft is positioned in the recess, and both ends of the transmission shaft respectively enter the C-shaped grooves of the upper top wall and the lower bottom wall.

[0010] Furthermore, a first positioning groove and a second positioning groove are provided on a side wall of the plate clamping head facing the groove, the first positioning groove is installed corresponding to a proximal end position of the C-shaped groove close to the rotation axis of the plate clamping head, and the second positioning groove is installed corresponding to a distal end position of the C-shaped groove far from the rotation axis of the plate clamping head. A bead spring is provided on the first sliding joint, one end of which protrudes from the groove side wall of the groove, and when the bead spring enters the first positioning groove, the plate clamping head is positioned in a locking position, and when the bead spring enters the second positioning groove, the plate clamping head is positioned in an unlocking position.

[0011] Furthermore, a chute is further provided on the side of the first sliding joint facing the clamp block, and when the clamp block is in a locked state, a part or all of the clamp block enters the chute, and a first elastic member is further provided within the chute, which is fitted onto the outer periphery of the tension shaft and elastically disposed between the clamp block and the first sliding joint.

[0012] Furthermore, a first guide hole that slides into engagement with the circumferential outer wall of a portion of the first tubular body is provided on the first slide joint, and the hole wall of the first guide hole is connected to the groove wall of the chute. A first clamping arc surface is provided on the side of the clamp block facing the first guide hole, and cooperates with the first slide joint to clamp the first tubular body by abutting against the circumferential outer wall of another portion of the first tubular body.

[0013] Furthermore, the tension shaft is a tension screw having an external thread at one end, and the clamp block is screwed onto the tension shaft.

[0014] Further, a second guide hole is provided on the second slide joint, which slides and engages with an outer wall of a portion of the third tube in a circumferential direction, and an attachment cavity is provided inside the second slide joint, and a hole wall of the second guide hole communicates with a cavity side wall of the attachment cavity, and the driven locking mechanism includes: a pair of pressing blocks slidably installed in the mounting cavity along a connection direction of the pair of third pipes, the pair of pressing blocks having a second clamping arc surface on a side facing the second guide hole, the second clamping arc surface abutting against a circumferential outer wall of another part of the third pipe to cooperate with the second slide joint to clamp the third pipe, and a first inclined guide surface on the other side of the pressing blocks away from the second clamping arc surface; a main inclined pressure block that is slidably installed in the mounting cavity along a direction perpendicular to the connection direction of the pair of third pipe bodies, the main inclined pressure block having a second inclined guide surface that engages with the inclined surface of the first inclined guide surface on a side surface of the main inclined pressure block that contacts the pair of pressing blocks; a second elastic member that is elastically installed between the second slide joint and the pressing block, and an elastic force of the second elastic member drives the main inclination pressure block to move in a direction to press the pressing block; The interlock mechanism includes: a transmission rod having one end fixedly connected to the operating member and rotating synchronously with the operating member, and having the other end extending into a mounting cavity in the second sliding joint; and a force transmission cam located in a mounting cavity in the second slide joint and fixedly connected on the transmission rod, the force transmission cam urging the main inclined pressure block to press the pressure block during the process of rotating with the transmission rod, so that the pressure block and the second slide joint cooperate to clamp the third tube body in a first state, and in a second state to release the main inclined pressure block.

[0015] Further, a sub-inclined pressure block is provided in the internal recess of the main inclined pressure block, and a third inclined guide surface that engages with the inclined surface of the first inclined guide surface is provided on a side surface of the sub-inclined pressure block that contacts the pair of pressing blocks, the third inclined guide surface and the second inclined guide surface are installed flush with each other, an adjustment screw is screwed into the main inclined pressure block, and the adjustment screw is fixedly connected to the sub-inclined pressure block, a third elastic member is provided between the main inclined pressure block and the sub-inclined pressure block, and the elastic force direction of the third elastic member is the same as the movement direction of the main inclined pressure block.

[0016] Furthermore, one end of the third tube is installed in a telescopic manner within the corresponding second tube, a third fixed joint is fixedly connected to the other end of the third tube, and an anti-slip sheet is fitted onto the outer periphery of the end of the third tube that enters the second tube, and the anti-slip sheet is used to prevent the third tube from slipping out of the second tube.

[0017] A tripod stand includes a support body and a plurality of one-touch-operable support legs as described above that are connected onto the support body. Effect of the Invention

[0018] The technical solution of the present invention has the following advantages:

[0019] 1. In the one-touch operation support leg of the present invention, an interlocking mechanism is installed between the active locking mechanism and the driven locking mechanism. When the active locking mechanism performs a lock / unlock operation, the interlocking mechanism can drive the driven locking mechanism to perform the lock / unlock operation synchronously. With this installation, by operating the active locking mechanism, the three-section bracket can be locked or unlocked synchronously, and the support leg can be released and fixed with one touch, which is simple to operate and effectively improves the telescopic adjustment speed of the support leg.

[0020] 2. In the one-touch operation support leg of this invention, the first section bracket, the second section bracket and the third section bracket all have a structural form composed of at least two pipes arranged in parallel, which has the advantages of high support stability, the ability to design a single pipe with a smaller diameter, and ease of portability.

[0021] 3. In the one-touch operation support leg of this invention, the active locking mechanism consisting of the tension shaft, clamp block, operating member and transmission shaft has the advantages of simple structure, ease of operation and excellent locking effect.

[0022] 4. In the one-touch support leg of the present invention, a C-groove is installed on the plate clamp head, and the transmission shaft enters the C-groove and can slide within the C-groove. This structural design can easily convert the rotational motion of the plate clamp into the linear motion of the clamp block, making the transmission structure simple and reliable, making it easy to realize the rotational operation of the plate clamp, and ensuring the locking effect.

[0023] 5. In the one-touch operation support leg of the present invention, a recess is installed inside the plate clamp head, the transmission shaft fits into the recess, and both ends of the transmission shaft fit into the C-shaped grooves on the upper top wall and lower bottom wall respectively. This installation has the advantages of a compact structure and a highly reliable transmission structure.

[0024] 6. In the one-touch operation support leg of the present invention, the first positioning groove, the second positioning groove and the bead spring are installed to position the plate clamp head in the locked or unlocked position, thereby preventing the plate clamp from loosening due to accidental collision.

[0025] 7. In the one-touch operation support leg of the present invention, a chute is installed in the first sliding joint, a clamp block is installed slidably in the chute, and a first elastic member is installed in the chute and positioned between the clamp block and the first sliding joint, which has the advantages of a compact structure, high locking reliability, and low loosening.

[0026] 8. In the one-touch support leg of the present invention, a first guide hole that slides into engagement with the circumferential outer wall of a part of the first tube is provided on the first sliding joint, the hole wall of the first guide hole is connected to the groove wall of the chute, and a first clamping arc surface that abuts against the circumferential outer wall of another part of the first tube is provided on the side of the clamping block facing the first guide hole. This arrangement makes it possible to better clamp the first tube, and the clamping portion is located inside the first sliding joint, resulting in advantages such as excellent overall aesthetics and the clamping portion being less likely to be damaged.

[0027] 9. In the one-touch operation type support leg of the present invention, the tension shaft and the clamping block are screwed together, and the clamping force of the clamping block can be adjusted by the tension shaft during the installation process.

[0028] 10. In the one-touch operation support leg of the present invention, the passive locking mechanism composed of a pair of pressure blocks, a main inclined pressure block and a second elastic member cooperates with an interlocking mechanism composed of a transmission rod and a force transmission cam. When the plate clamp of the active locking mechanism rotates, the transmission rod and the force transmission cam can cause the main inclined pressure block to move horizontally. The rotational motion of the transmission rod can be easily converted into the linear motion of the clamp block, resulting in simple transmission structure, high reliability and reliable locking effect.

[0029] 11. In the one-touch operation support leg of the present invention, the sub-inclined pressure block can be moved by rotating the adjustment screw, and the movement stroke of the pair of clamping blocks can be changed, so that the magnitude of the clamping force of the pair of clamping blocks against the third tube can be adjusted during the installation process.

[0030] 12. In the one-touch support leg of the present invention, the extendable structural design of the third tube body and the second tube body has the advantages of simple structure and excellent aesthetics, while the anti-slip sheet can prevent the third tube body from slipping out of the second tube body.

[0031] 13. The tripod stand of the present invention adopts the above-mentioned one-touch operation type support legs, which can realize one-touch release and one-touch fixing of the support legs, which is simple to operate and effectively improves the telescopic adjustment speed of the support legs. [Brief description of the drawings]

[0032] In order to more clearly describe the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces drawings that need to be used in the embodiments of the present invention or the prior art description. It is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings based on these drawings without exerting creative efforts. [Figure 1] 4 is a schematic diagram of the structure of the support leg in a contracted state in the embodiment of the present invention; [Diagram 2] 2 is a schematic structural diagram of the support leg in an extended state according to an embodiment of the present invention; FIG. [Diagram 3] FIG. 2 is a cross-sectional view of a first sliding joint position according to an embodiment of the present invention; [Figure 4] FIG. 2 is a second cross-sectional view of the embodiment of the present invention at the first sliding joint position. [Diagram 5] FIG. 2 is an exploded view of a tension shaft, a clamp block, an operating member, a transmission shaft and a first sliding joint in an embodiment of the present invention. [Figure 6] 4 is a schematic diagram of the rear structure of the first sliding joint in the embodiment of the present invention; FIG. [Figure 7] 4 is a schematic diagram of a connection structure between an operating member and a transmission shaft in an embodiment of the present invention. [Figure 8] FIG. 4 is a cross-sectional view of the embodiment of the present invention at a second sliding joint position. [Figure 9] 4 is a schematic diagram of a connection structure between a main gradient pressure block and a sub gradient pressure block in an embodiment of the present invention; FIG. [Figure 10] 4 is a schematic diagram showing the structure of the tripod stand in a retracted state according to the embodiment of the present invention; FIG. [Figure 11] 2 is a schematic diagram showing the structure of the tripod stand in an extended state according to the embodiment of the present invention; FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0033] The following clearly and completely describes the technical solution of the present invention in conjunction with the drawings, and it is obvious that the described embodiments are only some of the embodiments of the present invention, and not all of the embodiments. All other embodiments obtained based on the embodiments of the present invention without the creative efforts of those skilled in the art are all within the scope of protection of the present invention.

[0034] In the description of the present invention, it should be explained that the orientations or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are orientations or positional relationships shown based on the drawings, and are only for facilitating and simplifying the description of the present invention, and do not indicate or imply that the devices or elements mentioned have a specific orientation and must be configured and operated in a specific orientation, and should not be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and should not be understood as indicating or implying relative importance.

[0035] In the description of the present invention, it should be explained that unless otherwise clearly defined or limited, the terms "attached", "connected" and "connected" should be understood in a broad sense, for example, may be a fixed connection, a removable connection, or an integral connection, may be a mechanical connection, may be an electrical connection, may be a direct connection, may be an indirect connection through an intermediate medium, or may be a communication between two elements. Those skilled in the art can understand the specific meaning of the above terms in the present invention according to the specific situation.

[0036] As shown in Figs. 1 to 9, the one-touch operation support leg includes a bracket 1 of a first section, a bracket 2 of a second section, and a bracket 3 of a third section. In the longitudinal extension direction of the support leg, the bracket 2 of the second section can slide relative to the bracket 1 of the first section, and the bracket 3 of the third section can slide relative to the bracket 2 of the second section. Between the bracket 1 of the first section and the bracket 2 of the second section, an active locking mechanism is provided for locking or unlocking the two, and between the bracket 2 of the second section and the bracket 3 of the third section, a passive locking mechanism is provided for locking or unlocking the two. The support leg further includes an interlock mechanism 6 connected between the active locking mechanism and the passive locking mechanism, and the active locking mechanism moves the passive locking mechanism by the interlock mechanism 6 to simultaneously lock or unlock the passive locking mechanism and the active locking mechanism.

[0037] In such a one-touch operation type support leg, an interlock mechanism 6 is installed between the active locking mechanism and the driven locking mechanism. When the active locking mechanism performs a lock / unlock operation, the interlock mechanism 6 can drive the driven locking mechanism to perform the lock / unlock operation synchronously. With this installation, by operating the active locking mechanism, synchronous locking or unlocking of the three-section bracket can be achieved, and one-touch release and one-touch fixing of the support leg can be achieved. The operation is simple, and the telescopic adjustment speed of the support leg is effectively improved.

[0038] Here, the first section bracket 1 includes two first tubes 11 arranged in parallel, and a first fixed joint 12 and a second fixed joint 13 fixed between the two first tubes 11. The first fixed joint 12 is fixed to the ends of the two first tubes 11 close to the support body 7, and the second fixed joint 13 is fixed to the other ends of the two first tubes 11 away from the support body 7. Of course, the number of first tubes 11 may be three or more arranged in parallel.

[0039] The second section bracket 2 includes two second tubes 21 arranged in parallel, and a first sliding joint 22 and a second sliding joint 23 fixed between the two second tubes 21. The first sliding joint 22 is fixed to the ends of the two second tubes 21 close to the first fixed joint 12, and the second sliding joint 23 is fixed to the other ends of the two second tubes 21 away from the first fixed joint 12. Of course, the number of second tubes 21 may be three or more arranged in parallel.

[0040] The bracket 3 of the third section includes two third tubes 31 arranged in parallel and a third fixed joint 32 fixed between the two third tubes 31. One end of the third tube 31 enters the inside of the corresponding second tube 21, and the third fixed joint 32 is fixed to the other end of the two third tubes 31 protruding outside the second tube 21. An anti-slip sheet is fixed to the outer wall of the end of the third tube 31 entering the second tube 21, and the anti-slip sheet is used to prevent the third tube 31 from slipping out of the second tube 21. Of course, the number of third tubes 31 may be three or more arranged in parallel.

[0041] In some embodiments, two parallel first tubes 11 are slidably connected on the first sliding joint 22, and two parallel third tubes 31 are slidably connected on the second sliding joint 23. An active locking mechanism is installed on the second sliding joint 23, a passive locking mechanism is installed on the second sliding joint 23, and an interlocking mechanism 6 is connected between the first sliding joint 22 and the second sliding joint 23. The first section bracket 1, the second section bracket 2, and the third section bracket 3 all have a structural form composed of at least two parallel arranged tubes, which has the advantages of high support stability, a smaller diameter design for a single tube, and easy portability.

[0042] In some embodiments, a first through hole 224 is provided on the first sliding joint 22. The active locking mechanism includes a tension shaft 41, a clamp block 42, an operating member 43, and a transmission shaft 44. Here, the first through hole 224 is installed to be perpendicular to the first sliding joint 22, and the tension shaft 41 is movably drilled on the first through hole 224 along the axial direction of the first through hole 224. The clamp block 42 is located on one side of the first sliding joint 22 and is fixedly connected to the end of the tension shaft 41 protruding from the first through hole 224. The operating member 43 is rotatably connected to the side of the first sliding joint 22 away from the clamp block 42, and the transmission shaft 44 is fixedly connected to the other end of the tension shaft 41 protruding from the first through hole 224, and is connected to the operating member 43 for transmission. During rotation, the operating member 43 moves the pulling shaft 41 and the clamp block 42 via the transmission shaft 44, and the clamp block 42 cooperates with the first sliding joint 22 to clamp the first tubular body 11. The active locking mechanism consisting of the pulling shaft 41, the clamp block 42, the operating member 43 and the transmission shaft 44 has the advantages of being simple in structure, easy to operate, and excellent in locking effect.

[0043] In some embodiments, the operating member 43 is specifically a clamp, which includes a clamp arm 431 and a clamp head 432 that are integrally connected, a groove 221 is provided on the first sliding joint 22 for accommodating the clamp head 432, the clamp head 432 is rotatably connected on the pin shaft 46, a C-shaped groove 4321 is provided on the clamp head 432, the distances from the two ends of the C-shaped groove 4321 to the rotation axis of the clamp head 432 are different, and the transmission shaft 44 can enter the C-shaped groove 4321 and slide in the C-shaped groove 4321. The plate clamp head 432 is provided with a C-shaped groove 4321, and the transmission shaft 44 enters the C-shaped groove 4321 and can slide within the C-shaped groove 4321. This structural design can easily convert the rotational motion of the plate clamp into the linear motion of the clamp block 42, making the transmission structure simple, smooth and reliable. The rotational operation of the plate clamp is easy to achieve, and the locking effect is reliable.

[0044] In some embodiments, a recess is provided inside the plate clamp head 432, the plate clamp head 432 includes an upper top wall 4322 as the upper wall of the recess and a lower bottom wall 4323 as the lower wall of the recess, the upper top wall 4322 and the lower bottom wall 4323 are both provided with C-shaped grooves 4321, the transmission shaft 44 is located in the recess, and both ends of the transmission shaft 44 respectively enter the C-shaped grooves 4321 of the upper top wall 4322 and the lower bottom wall 4323. This arrangement has the advantages of a compact structure and a high reliability of the transmission structure.

[0045] In some embodiments, a first positioning groove 4324 and a second positioning groove 4325 are provided on the side wall of the clamp head 432 facing the groove 221, the first positioning groove 4324 is disposed corresponding to a proximal position of the C-shaped groove 4321 close to the rotation axis of the clamp head 432, and the second positioning groove 4325 is disposed corresponding to a distal position of the C-shaped groove 4321 far from the rotation axis of the clamp head 432. A bead spring 47 is provided on the first sliding joint 22, one end of which protrudes from the groove side wall of the groove 221, and two bead springs 47 are provided along the thickness direction of the clamp head 432. When the bead spring 47 enters the first positioning groove 4324, the clamp head 432 is positioned in the lock position, and when the bead spring 47 enters the second positioning groove 4325, the clamp head 432 is positioned in the unlock position. By providing the first positioning groove 4324, the second positioning groove 4325 and the bead spring 47, the clamp head 432 can be positioned in a locked or unlocked position to prevent the clamp from loosening due to accidental collision.

[0046] In some embodiments, a chute 222 is further provided on the side of the first sliding joint 22 facing the clamp block 42, and when the clamp block 42 is in a locked state, a part or all of the clamp block 42 enters the chute 222, and a first elastic member 45 is further provided in the chute 222, fitted around the outer periphery of the tension shaft 41 and elastically disposed between the clamp block 42 and the first sliding joint 22. The chute 222 is provided in the first sliding joint 22, which has the advantage of providing a compact structure, while the first elastic member 45 is provided between the clamp block 42 and the first sliding joint 22, which allows the clamp block 42 to press the first tube 11 and ensure high reliability in the locked state.

[0047] In some embodiments, a first guide hole 223 that slides and fits with a circumferential outer wall of a part of the first tube 11 is provided on the first sliding joint 22, the hole wall of the first guide hole 223 communicates with the groove wall of the chute 222, and a first clamping arc surface 421 is provided on the side of the clamp block 42 facing the first guide hole 223, which abuts against a circumferential outer wall of another part of the first tube 11 to cooperate with the first sliding joint 22 to clamp the first tube 11. This arrangement makes it possible to better realize clamping of the first tube 11, and the clamping part is located inside the first sliding joint 22, which has the advantages of being excellent in overall aesthetics and less likely to be damaged.

[0048] In some embodiments, the tension shaft 41 is a tension screw with an external thread at one end, and the clamp block 42 is screwed onto the tension shaft 41. In the manner in which the tension shaft 41 and the clamp block 42 are screwed together, the magnitude of the clamping force of the clamp block 42 can be adjusted by the tension shaft 41 during the installation process.

[0049] In this embodiment, a second guide hole 232 that slides into engagement with a portion of the circumferential outer wall of the third tube body 31 is provided on the second sliding joint 23, and a mounting cavity 231 is provided inside the second sliding joint 23, and the hole wall of the second guide hole 232 is connected to the cavity side wall of the mounting cavity 231.

[0050] The driven locking mechanism includes a pair of pressing blocks 51, a main inclined pressure block 52, and a second elastic member 53. Here, the pair of pressing blocks 51 are slidably installed in the mounting cavity 231 along the connection direction of the pair of third tubes 31, and a second clamping arc surface 511 is provided on the side of the pressing block 51 facing the second guide hole 232, which abuts against the outer wall of another part of the third tube 31 in the circumferential direction to clamp the third tube 31 in cooperation with the second slide joint 23, and a first inclined guide surface 512 is provided on the other side of the pressing block 51 away from the second clamping arc surface 511. The main inclined pressure block 52 is slidably installed in the mounting cavity 231 along a direction perpendicular to the connection direction of the pair of third tubes 31, and a second inclined guide surface 521 that engages with the inclined surface of the first inclined guide surface 512 is provided on the side surface of the main inclined pressure block 52 that contacts the pair of pressing blocks 51. The second elastic member 53 is elastically installed between the second slide joint 23 and the pressing block 51, and the elastic force of the second elastic member 53 drives the main inclination pressure block 52 to move in a direction pressing the pressing block 51.

[0051] The interlock mechanism 6 includes a transmission rod 61 and a force transmission cam 62. One end of the transmission rod 61 is fixedly connected to the operating member 43 and rotates synchronously with the operating member 43, and the other end enters into the mounting cavity 231 in the second slide joint 23. The force transmission cam 62 is located in the mounting cavity 231 in the second slide joint 23 and fixedly connected on the transmission rod 61. In the process of rotating together with the transmission rod 61, the force transmission cam 62 propels the main inclined pressure block 52 to press the pressing block 51, so that the pressing block 51 and the second slide joint 23 cooperate to clamp the third tube 31 in a first state, and loosen the main inclined pressure block 52 in a second state.

[0052] The passive locking mechanism, which is composed of a pair of pressure blocks 51, a main inclined pressure block 52 and a second elastic member 53, cooperates with an interlock mechanism 6, which is composed of a transmission rod 61 and a force transmission cam 62. When the plate clamp of the active locking mechanism rotates, the transmission rod 61 and the force transmission cam 62 can move the main inclined pressure block 52 horizontally. The rotational motion of the transmission rod 61 can be easily converted into the linear motion of the clamp block 42. This has the advantages of a simple transmission structure, high reliability and reliable locking effect.

[0053] In some embodiments, the sub-inclined pressure block 54 is provided in the inner recess of the main inclined pressure block 52, and the side of the sub-inclined pressure block 54 that contacts the pair of pressing blocks 51 is provided with a third inclined guide surface 541 that engages with the inclined surface of the first inclined guide surface 512, and the third inclined guide surface 541 and the second inclined guide surface 521 are flush with each other. An adjustment screw 55 is screwed into the main inclined pressure block 52, and the adjustment screw 55 is fixedly connected to the sub-inclined pressure block 54. A third elastic member 56 is provided between the main inclined pressure block 52 and the sub-inclined pressure block 54, and the elastic force direction of the third elastic member 56 is the same as the movement direction of the main inclined pressure block 52. By rotating the adjustment screw 55, the sub-inclined pressure block 54 can be moved, and the movement stroke of the pair of pressing blocks 51 can be changed, so that the magnitude of the clamping force of the pair of pressing blocks 51 against the third tube 31 can be adjusted during the installation process.

[0054] As shown in Figs. 10-11, an embodiment of the present invention further provides a tripod stand, which is mainly used for supporting photographic equipment. The tripod stand includes a support body 7 and three support legs hinged on the support body 7, and the support legs are the one-touch operation support legs described above. As can be understood, the number of support legs may be adaptively selected according to need, for example, the number of support legs is four. Such a tripod stand adopts the one-touch operation support legs described above, which can realize one-touch release and one-touch fixation of the support legs, which is easy to operate, and effectively improves the telescopic adjustment speed of the support legs.

[0055] To sum up, the one-touch operation support leg and tripod stand according to the embodiment of the present invention can realize one-touch release and one-touch fixing of the support leg, has the advantages of simple structure, easy operation and excellent locking reliability, and effectively improves the extension and retraction adjustment speed of the support leg during shooting.

[0056] Obviously, the above embodiment is merely an example for clarity of explanation, and is not intended to limit the embodiments. Those skilled in the art can make other different types of changes or variations based on the above description. It is not necessary and cannot be possible to cover all the embodiments here. And the obvious changes or variations derived thereby still fall within the scope of protection of the present invention. [Explanation of symbols]

[0057] 1, first section bracket; 11, first tube body; 12, first fixed joint; 13, second fixed joint; 2, second section bracket; 21, second tube; 22, first slide joint; 221, groove; 222, chute; 223, first guide hole; 224, first through hole; 23, second slide joint; 231, mounting cavity; 232, second guide hole; 3, third section bracket, 31, third tube body, 32, third fixed joint, 33, anti-slip sheet, 4, active locking mechanism, 41, tension shaft, 42, clamp block, 421, first clamp arc surface, 43, operating member, 44, transmission shaft, 431, plate clamp arm, 432, plate clamp head, 4321, C-shaped groove, 4322, upper top wall, 4323, lower bottom wall, 4324, first positioning groove, 4325, second positioning groove, 45, first elastic member, 46, pin shaft, 47, bead spring, 51, pressing block; 511, second clamping arc surface; 512, first inclined guide surface; 52, main inclined pressure block, 521, second inclined guide surface, 53, second elastic member, 54, sub inclined pressure block, 541, third inclined guide surface, 55, adjustment screw, 56, third elastic member, 6, interlock mechanism, 61, transmission rod, 62, force transmission cam, 7. Support body.

Claims

1. 1. A one-touch operation support leg comprising a first section bracket (1), a second section bracket (2), and a third section bracket (3), wherein the second section bracket (2) is slidable relative to the first section bracket (1) and the third section bracket (3) is slidable relative to the second section bracket (2) in the longitudinal extension direction of the support leg, an active locking mechanism is provided between the first section bracket (1) and the second section bracket (2) for locking or unlocking the two, and a passive locking mechanism is provided between the second section bracket (2) and the third section bracket (3) for locking or unlocking the two, the one-touch operation support leg further comprising an interlock mechanism (6) connected between the active locking mechanism and the passive locking mechanism, wherein the active locking mechanism moves the passive locking mechanism via the interlock mechanism (6) to simultaneously lock or unlock the passive locking mechanism and the active locking mechanism.

2. The one-touch operation support leg according to claim 1, characterized in that the first section bracket (1) includes at least two first tube bodies (11) arranged in parallel, the second section bracket (2) includes at least two second tube bodies (21) arranged in parallel, and a first sliding joint (22) and a second sliding joint (23) fixedly connected between the at least two second tube bodies (21), and the third section bracket (3) includes at least two third tube bodies (31) arranged in parallel, and at least two of the first tube bodies (11) and the first sliding joint (22) are slidably connected, and at least two of the third tube bodies (31) and the second sliding joint (23) are slidably connected.

3. A first through hole (224) is provided on the first sliding joint (22), and the active locking mechanism comprises: A pulling shaft (41) movably inserted in the first through hole (224); a clamp block (42) located on one side of the first sliding joint (22) and fixedly connected to an end of the tension shaft (41) protruding from the first through hole (224); an operating member (43) rotatably connected to a side of the first sliding joint (22) away from the clamp block (42) about a pin shaft (46); a transmission shaft (44) fixedly connected to the other end of the pulling shaft (41) protruding from the first through hole (224) and connected to the operating member (43) in a transmissible manner; The one-touch operation support leg according to claim 2, characterized in that, during rotation, the operating member (43) moves the pulling shaft (41) and the clamp block (42) through the transmission shaft (44), so that the clamp block (42) and the first slide joint (22) cooperate to clamp the first pipe body (11).

4. The one-touch operation support leg of claim 3, characterized in that the operating member (43) is specifically a clamp, which includes a clamp arm (431) and a clamp head (432) connected integrally, a groove (221) is provided on the first sliding joint (22) for accommodating the clamp head (432), the clamp head (432) is rotatably connected on the pin shaft (46), a C-shaped groove (4321) is provided on the clamp head (432), the distances from the two ends of the C-shaped groove (4321) to the rotation axis of the clamp head (432) are different, and the transmission shaft (44) can enter the C-shaped groove (4321) and slide in the C-shaped groove (4321).

5. The one-touch operation support leg of claim 4, characterized in that a recess is provided inside the plate clamping head (432), the plate clamping head (432) includes an upper top wall (4322) which serves as the upper wall of the recess, and a lower bottom wall (4323) which serves as the lower wall of the recess, the upper top wall (4322) and the lower bottom wall (4323) both have the C-shaped groove (4321), the transmission shaft (44) is located in the recess, and both ends of the transmission shaft (44) respectively enter the C-shaped groove (4321) of the upper top wall (4322) and the lower bottom wall (4323).

6. The side wall of the clamp head (432) facing the groove (221) is provided with a first positioning groove (4324) and a second positioning groove (4325). The first positioning groove (4324) is located at a position corresponding to the proximal end of the C-shaped groove (4321) close to the rotation axis of the clamp head (432). The second positioning groove (4325) is located at a position corresponding to the distal end of the C-shaped groove (4321) far from the rotation axis of the clamp head (432). The first sliding joint The one-touch operation support leg of claim 5, characterized in that a bead spring (47) is provided on the joint (22), one end of which protrudes from the groove side wall of the groove (221), and when the bead spring (47) enters the first positioning groove (4324), the plate clamp head (432) is positioned in the lock position, and when the bead spring (47) enters the second positioning groove (4325), the plate clamp head (432) is positioned in the unlock position.

7. The one-touch operation support leg according to claim 3, characterized in that a chute (222) is further provided on a side of the first sliding joint (22) facing the clamp block (42), and when the clamp block (42) is in a locked state, a part or all of the clamp block (42) enters the chute (222), and a first elastic member (45) is further provided in the chute (222), which is fitted around the outer periphery of the pulling shaft (41) and elastically installed between the clamp block (42) and the first sliding joint (22).

8. The one-touch operation support leg according to claim 7, characterized in that a first guide hole (223) that slides and fits with a circumferential outer wall of a portion of the first tubular body (11) is provided on the first sliding joint (22), the hole wall of the first guide hole (223) is connected to a groove wall of the chute (222), and a first clamping arc surface (421) that abuts against a circumferential outer wall of another portion of the first tubular body (11) in cooperation with the first sliding joint (22) to clamp the first tubular body (11) is provided on the side of the clamping block (42) facing the first guide hole (223).

9. The one-touch operation type support leg according to claim 3, characterized in that the tension shaft (41) is a tension screw having an external thread at one end, and the clamp block (42) is screwed onto the tension shaft (41).

10. A second guide hole (232) that slides and fits with a circumferential outer wall of a portion of the third tubular body (31) is provided on the second slide joint (23), and an attachment cavity (231) is provided inside the second slide joint (23), and a hole wall of the second guide hole (232) communicates with a cavity side wall of the attachment cavity (231), and the driven locking mechanism comprises: a pair of pressing blocks (51) slidably installed in the mounting cavity (231) along a connection direction of the pair of third pipes (31), the pair of pressing blocks (51) being provided with a second clamping arc surface (511) on a side facing the second guide hole (232) for clamping the third pipe (31) in cooperation with the second slide joint (23) by abutting against an outer wall in the circumferential direction of another part of the third pipe (31), and a first inclined guide surface (512) on the other side of the pressing blocks (51) away from the second clamping arc surface (511); a main inclined pressure block (52) that is slidably installed in the mounting cavity (231) along a direction perpendicular to the connection direction of the pair of third pipe bodies (31), the main inclined pressure block (52) having a second inclined guide surface (521) that engages with the inclined surface of the first inclined guide surface (512) on a side surface of the main inclined pressure block (52) that contacts the pair of pressing blocks (51); a second elastic member (53) elastically installed between the second slide joint (23) and the pressing block (51), the elastic force of the second elastic member (53) driving the main inclination pressure block (52) to move in a direction pressing the pressing block (51); The interlock mechanism (6) is a transmission rod (61) having one end fixedly connected to the operating member (43) and rotating synchronously with the operating member (43), and having the other end inserted into a mounting cavity (231) in the second sliding joint (23); 4. The one-touch operation support leg according to claim 3, further comprising: a force transmitting cam (62) located in a mounting cavity (231) in the second sliding joint (23) and fixedly connected on the transmission rod (61), the force transmitting cam (62) urging the main tilt pressure block (52) to press the pressure block (51) in a process of rotating together with the transmission rod (61), so that the pressure block (51) and the second sliding joint (23) cooperate to clamp the third tube (31) in a first state, and a force transmitting cam (62) loosening the main tilt pressure block (52) in a second state.

11. 11. The one-touch operation support leg according to claim 10, characterized in that a sub-tilt pressure block (54) is provided in an internal recess of the main tilt pressure block (52), a third tilt guide surface (541) is provided on a side surface of the sub-tilt pressure block (54) that contacts the pair of pressing blocks (51), the third tilt guide surface (541) engaging with the tilt surface of the first tilt guide surface (512), the third tilt guide surface (541) and the second tilt guide surface (521) are installed flush with each other, an adjustment screw (55) is screwed into the main tilt pressure block (52), the adjustment screw (55) is fixedly connected to the sub-tilt pressure block (54), a third elastic member (56) is provided between the main tilt pressure block (52) and the sub-tilt pressure block (54), and the elastic force direction of the third elastic member (56) is the same as the movement direction of the main tilt pressure block (52).

12. The one-touch operation support leg according to claim 1, characterized in that one end of the third tube (31) is installed in a telescopic manner within the corresponding second tube (21), a third fixed joint (32) is fixedly connected to the other end of the third tube (31), and an anti-slip sheet is fitted onto the outer periphery of the end of the third tube (31) that enters the second tube (21), and the anti-slip sheet is used to prevent the third tube (31) from slipping out of the second tube (21).

13. A tripod stand, comprising: a support body (7); and a plurality of one-touch operation support legs according to claim 1 connected to the support body (7).

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