Photographic tripod and supporting leg thereof

Abstract

The invention relates to a photography tripod and a supporting leg thereof, the supporting leg comprises a first pipe, a second pipe, a third pipe and a fourth pipe, the first pipe defines a first end and a second end which are opposite in the axial direction, the first end is provided with a first notch, and the first notch comprises a longitudinal notch and a transverse groove intersecting with the longitudinal notch; the first fastening piece is used for changing the radial size of the first end, a boss is arranged on the inner circumferential face of the first fastening piece, and the boss is used for being matched with the transverse groove to limit the first fastening piece; the radial size of the second fastening piece can be adjusted, a protruding block is arranged on the peripheral face of the second fastening piece, the protruding block is matched with the longitudinal notch so as to limit the second fastening piece in the circumferential direction, and the boss is matched with the protruding block so as to limit the second fastening piece in the axial direction; the second pipe is movably arranged in the channel in a sleeving manner and is locked at different positions in the first pipe or released by a second fastener; and the second fastener can lock or release the second pipe. According to the technical scheme, the second pipe can be locked or released, and operation is convenient; and the assembly is very convenient.

Description

Technical Field

[0001] The present application relates to the technical field of supporting parts, and in particular to a photographic tripod and its legs. Background Art

[0002] In order to facilitate the operation of photographic equipment, projectors or other instruments, a tripod with adjustable height is usually used to support such equipment. The tripod with adjustable height usually includes a plurality of legs, each leg being composed of a plurality of tubes connected end to end. The height of the tripod is adjusted by extending or retracting the inner tubes connected to each other relative to the outer tubes. The existing legs are inconvenient to operate and time-consuming and labor-intensive. Summary of the invention

[0003] In view of this, the purpose of the present application is to provide a photographic tripod and its legs to improve the above-mentioned problems or at least solve the above-mentioned technical problems to a certain extent.

[0004] To achieve the above object, the present application provides a support leg, comprising:

[0005] A first tube, defined with a first end and a second end opposite to each other in the axial direction, a passage penetrating in the axial direction is formed in the first tube, the passage forms an opening at the first end, the first end is provided with a first notch extending from the opening toward the second end, the first notch includes a longitudinal notch and a transverse groove intersecting the longitudinal notch;

[0006] A first fastener is disposed on the outer side of the first end and is used to change the radial dimension of the first end. A boss is provided on the inner circumference of the first fastener, and the boss is used to cooperate with the transverse groove of the first notch of the first tube to define the first fastener;

[0007] a second fastener, disposed on the inner side of the first end, the radial dimension of the second fastener being adjustable, a protrusion being provided on the outer peripheral surface of the second fastener, the protrusion cooperating with the longitudinal notch of the first notch of the first tube to circumferentially limit the second fastener, and the boss cooperating with the protrusion to axially limit the second fastener;

[0008] A second tube is movably sleeved in the passage of the first tube and is locked or released at different positions in the first tube by the second fastener;

[0009] The radial dimension of the second fastener changes with the radial dimension of the first end, so that the second fastener locks or releases the second tube.

[0010] In some embodiments, the protrusion is located in a region between an end of the longitudinal notch away from the first end and the transverse groove.

[0011] In some embodiments, an end surface is formed at one end of the protrusion along the axial direction, and the boss abuts against the end surface of the protrusion.

[0012] In some embodiments, the protrusion is inserted into the longitudinal notch, and two side edges opposite to each other are formed on both circumferential sides of the longitudinal notch, and the circumferential position of the protrusion is limited by the two side edges in the circumferential direction.

[0013] In some embodiments, at least one side of the circumference of the protrusion is provided with a groove, and part of the boss is inserted into the groove and part is inserted into the transverse groove.

[0014] In some embodiments, the number of the first notches and the number of the protrusions are both two, the two first notches are arranged at an interval of 180° along the circumference of the first tube, and the two protrusions are arranged at an interval of 180° along the circumference of the second fastener.

[0015] In some embodiments, the transverse groove is arranged perpendicular to the longitudinal notch.

[0016] In some embodiments, the first fastener includes an elastic ring, a pull button, a rotating shaft and a tensioning shaft. The elastic ring is sleeved on the outer periphery of the first end, the pull button abuts against the outer periphery of the elastic ring, the rotating shaft is rotatably disposed on the pull button and is connected to the elastic ring through the tensioning shaft. When the pull button is rotated, the elastic ring is clamped or loosened by the tensioning shaft, thereby changing the radial size of the first end.

[0017] In some embodiments, the second fastener is provided with a second notch, and the second notch radially penetrates the second fastener so that the second fastener is at least partially non-closed in the circumferential direction, so that the radial size of the second fastener can be adjusted.

[0018] The present application also provides a photographic tripod, comprising a photographic platform and the above-mentioned legs.

[0019] As described above, in the supporting leg and photographic tripod of the present application, the radial dimension of the first end of the first tube can be changed by applying force to the first fastener, thereby changing the radial dimension of the second fastener, thereby locking or releasing the second tube, and the operation is convenient; and during assembly, the second fastener and the first fastener are directly sleeved inside and outside the first tube respectively, and the second tube is sleeved into the second fastener, and the assembly is also very convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 Schematic diagram of the structure of a photography tripod according to an embodiment of the present application.

[0022] Figure 2 for Figure 1 Schematic diagram of the partial structure of the legs of a medium photography tripod.

[0023] Figure 3 for Figure 2 An exploded view of the legs.

[0024] Figure 4 for Figure 2 Another exploded schematic diagram of the legs shown.

[0025] Figure 5 for Figure 2 Another exploded diagram of the legs.

[0026] Figure 6 for Figure 2 Front view of the outrigger.

[0027] Figure 7 for Figure 6 Sectional view along AA direction.

[0028] Figure 8 for Figure 1 A schematic structural diagram of another embodiment of the legs of a medium photography tripod.

[0029] Fig. 9 for Figure 2 Exploded schematic diagram of the first fastener of the leg.

[0030] Fig.10 for Figure 2 Another exploded schematic illustration of the first fastener of the leg. DETAILED DESCRIPTION

[0031] The specific embodiments of the present application will be described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the description of the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0032] In the description of this application, unless otherwise clearly specified and limited, the terms "set", "install", "connect", etc. 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 an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0033] The terms "first", "second", "third", etc. are merely used to distinguish values ​​or elements of similar attributes, rather than to indicate or imply relative importance or a particular order.

[0034] The terms "comprises," "comprising," or any other variations thereof, are intended to cover a non-exclusive inclusion of the elements listed and may also include additional elements not expressly listed.

[0035] Please refer to Figure 1 The tripod 200 of one embodiment of the present application is used to support on a flat or uneven tabletop and ground, and can be used to support equipment to be supported, such as video equipment (cameras, video cameras, video lights, etc.), projectors or other precision instruments. In this embodiment, the tripod 200 is a photographic tripod. The tripod 200 includes retractable legs 100. Among them, the legs of a photographic tripod are also referred to as legs. In this embodiment, there are multiple legs 100, specifically three. In other embodiments, the number of legs 100 can also be one (that is, the tripod 200 is a monopod) or more. The multiple legs 100 can be unfolded to a certain angle, and the overall height of the tripod 200 can be adjusted by adjusting the unfolding amplitude, so as to fix the camera at a suitable shooting height. It should be noted that since the tripod 200 can be extended and shortened, it can also be applied to other usage scenarios that require height adjustment. In Figure 1 In the embodiment, the three legs 100 are put together, and the tripod 200 is usually in a storage state, which is convenient for carrying and storage; when the three legs 100 are rotated to a certain angle to be unfolded, the tripod 200 is usually in a use state and can be supported on a desktop or the ground.

[0036] Specifically, when the tripod 200 is a photography tripod, the tripod 200 may also include a photography platform.

[0037] Please refer to Figures 2 to 7The support leg 100 of one embodiment of the present application includes a first tube 10, a first fastener 20 sleeved on the outside of the first tube 10, a second fastener 30 embedded in the inside of the first tube 10, and a second tube 40 for connecting with the second fastener 30. A channel 11 is formed in the first tube 10 that penetrates along the axial direction, and the second tube 40 is used to be movably sleeved in the first tube 10 along the axial direction. The first tube 10 has a first end 12 and a second end 13 that are opposite in the axial direction, wherein the radial dimension of the first end 12 is adjustable. The second end 13 is used to connect to the equipment to be supported or to connect to other tubes, and the first end 12 is used to connect with the second tube 40.

[0038] In this embodiment, the first fastener 20 is disposed on the outside of the first end 12 of the first tube 10, and is used to apply a radial force to the first end 12. When the first end 12 is subjected to force, its radial dimension may change. The second fastener 30 is disposed on the inside of the first end 12, and is detachably connected to the second tube 40, and is used to releasably lock the second tube 40. When the radial dimension of the first end 12 of the first tube 10 changes, it acts on the second fastener 30, so that the second fastener 30 locks or releases the second tube 40. When the second tube 40 is released, it can move axially in the channel 11 to extend or retract relative to the first tube 10. In the example Figure 2 In the state shown, the second tube 40 is completely retracted into the first tube 10; when the second tube 40 is locked by the second fastener 30, it is fixed relative to the first tube 10. The diameter of the first tube 10 can be easily changed by the first fastener 20 and the second fastener 30 respectively arranged on the inner and outer sides of the first tube 10, so as to achieve the locking and release of the second tube 40, which is easy to operate. It should be noted that the leg 100 includes a plurality of sleeves that are sequentially sleeved to form a plurality of groups of mutually matched first tubes 10 and second tubes 40, and a second tube 40 that cooperates with the previous outer first tube 10 serves as the first tube 10 that cooperates with the next inner second tube 40, that is, except for the outermost and innermost sleeves, each of the remaining sleeves cooperates with the outer sleeve as the first tube 10 and the inner sleeve as the second tube 40.

[0039] In this embodiment, the first tube 10 is in the shape of a circular tube, and its axial lower end is the first end 12, and its axial upper end is the second end 13. The second end 13 is used to support the equipment to be supported or connect other tubes. The channel 11 forms an opening 111 at the first end 12, and the first end 12 is provided with a first notch 113 extending from the opening 111 toward the second end 13. The first notch 113 includes a longitudinal notch 1131 extending along the axial direction and a transverse groove 1133 intersecting with the longitudinal notch 1131. Specifically in this embodiment, the transverse groove 1133 is perpendicular to the longitudinal notch 1131. It can be understood that the transverse groove 1133 may not be perpendicular to the longitudinal notch 1131, and the transverse groove 1133 and the longitudinal notch 1131 intersect at an inclined angle. More specifically, the two transverse grooves 1133 are respectively arranged on both sides of the longitudinal notch 1131. Specifically, the first end 12 of the first tube 10 is provided with two first notches 113, thereby separating the first end 12 into two separate parts. More specifically, the two first notches 113 are arranged 180° apart along the circumference of the first tube 10. The axial direction or radial direction herein refers to the axial direction and radial direction of the leg 100. In this embodiment, the transverse groove 1133 intersects with the middle of the longitudinal notch 1131. Of course, the transverse groove 1133 may also intersect with other positions other than the middle of the longitudinal notch 1131.

[0040] Specifically, when the first tube 10 is the outermost sleeve, the second end 13 of the first tube 10 may be provided with an external thread 115 to be connected to the support portion 400 of the leg 100 (see Figure 1 ), the leg 100 is hinged to the base 300 of the tripod 200 through the support portion 400 (see Figure 1 ). It can be understood that the external thread 115 can also be replaced by other connection structures, which is not limited here. When the first tube 10 is an inner sleeve other than the outermost sleeve, the second end 13 of the first tube 10 can be provided with a connection hole 116. Specifically, the connection hole 116 can be a waist-shaped hole.

[0041] When the first end 12 is subjected to a radially inward force, due to the setting of the first notch 113, the two separated parts of the first end 12 can approach each other, and the circumferential width of the first notch 113 will decrease, that is, the radial size of the first end 12 is reduced. As a result, the radial size of the portion of the channel 11 corresponding to the first end 12 changes. Among them, the first end 12 has a certain elasticity and can undergo elastic deformation. For example, the first tube 10 can be made of elastic material. When the external force on the first end 12 is removed, the deformation of the first notch 113 is restored, and the radial size of the first tube 10 can be restored to the original size in the free state. Of course, when the first end 12 is made of a deformable material, even if the first notch 113 is not provided, the radial size of the first end 12 can be reduced under the action of the radially inward external force. Therefore, the reduction of the radial size of the first end 12 may not depend on the setting of the first notch 113.

[0042] In this embodiment, the second fastener 30 is fixedly connected to the first tube 10. Specifically, the second fastener 30 is embedded in the inner side of the first end 12 of the first tube 10, and its outer circumferential surface is in contact with the inner circumferential surface of the first end 12 of the first tube 10. The second fastener 30 is provided with a second notch 311. The second notch 311 penetrates the second fastener 30 in the radial direction so that the second fastener 30 is at least partially non-closed in the circumferential direction. Preferably, the second notch 311 extends along the entire length direction of the second fastener 30, that is, the second fastener 30 is a non-closed ring as a whole, so that the radial size of the second fastener 30 can be adjusted. It can be understood that two second notches 311 extending along the entire length direction can be formed on the second fastener 30, even if the second fastener 30 is composed of two separated semi-cylindrical sheets, the radial size of the second fastener 30 can also be changed; of course, the second fastener 30 can also be composed of three or more separated sheets, which is not limited here.

[0043] When the second fastener 30 is subjected to a radially inward force, due to the setting of the second notch 311, the two ends of the second fastener 30 in the circumferential direction may approach each other, and the circumferential width of the second notch 311 may be reduced, that is, the radial dimension of the second fastener 30 is reduced. Among them, the second fastener 30 may have a certain elasticity and may undergo elastic deformation. For example, the second fastener 30 may be made of an elastic material. When the external force on the second fastener 30 is removed, the deformation of the second notch 311 is restored, and the radial dimension of the second fastener 30 can be restored to the original dimension in the free state. Since the second fastener 30 is embedded in the first tube 10, when the first end 12 of the first tube 10 is subjected to a radially inward force and the radial dimension is reduced, the radially inward force is transmitted to the second fastener 30 through the first tube 10, thereby reducing the radial dimension of the second fastener 30.

[0044] Specifically, the outer circumferential surface of the second fastener 30 is provided with a protrusion 313, and the protrusion 313 is used to cooperate with the longitudinal notch 1131 of the first notch 113 of the first tube 10 to limit the second fastener 30 in the circumferential direction, that is, to limit the circumferential rotation of the second fastener 30 relative to the first tube 10. More specifically, the protrusion 313 is used to be inserted into the longitudinal notch 1131 of the first notch 113 of the first tube 10, and two side edges 1135 opposite to each other are formed on both sides of the circumference of the longitudinal notch 1131, and the circumferential position of the protrusion 313 is limited by the two side edges 1135. Specifically, the distance L1 between the end of the longitudinal notch 1131 away from the first end 12 and the transverse groove 1133 basically corresponds to the length L2 of the protrusion 313 along the axial direction, and L1 is preferably slightly larger than L2 for easy assembly. In this embodiment, the protrusion 313 is located in the area between the end of the longitudinal notch 1131 away from the first end 12 and the transverse groove 1133, and the end of the protrusion 313 along the axial direction forms an end surface 3131. Specifically, the width of the protrusion 313 along the circumferential direction basically corresponds to the width of the longitudinal notch 1131 of the first notch 113 along the circumferential direction, and the width of the protrusion 313 along the circumferential direction is preferably slightly smaller than the width of the longitudinal notch 1131 along the circumferential direction. Specifically, corresponding to the number of first notches 113, the number of protrusions 313 can also be two, and the two protrusions 313 are arranged 180° apart along the circumferential direction of the second fastener 30. It can be understood that the first notch 113 and the protrusion 313 can also be one, three, more than three or other numbers. Specifically, the protrusion 313 is provided at one end of the second fastener 30 (i.e., the upper end of the outer peripheral surface). It can be understood that "basically corresponding to" in this article means roughly equivalent but not absolutely equal.

[0045] After assembly, the second fastener 30 is embedded in the first end 12 of the first tube 10, and the protrusion 313 of the second fastener 30 is embedded in the longitudinal notch 1131 of the first notch 113 of the first tube 10. When the first end 12 of the first tube 10 is subjected to a radially inward force, the two separated parts of the first end 12 approach each other, so that the radial dimension of the first end 12 is reduced, thereby applying a radially inward force to the second fastener 30, so that the two ends of the second fastener 30 in the circumferential direction approach each other, and then the radial dimension of the second fastener 30 is reduced to lock the second tube 40 connected thereto. Similar to the first end 12 of the first tube 10, the second fastener 30 also has a certain elasticity, and its radial dimension change is reversible. When the force on the first end 12 of the first tube 10 is removed, the radial dimension of the first end 12 is restored to the original dimension, thereby restoring the deformation of the second fastener 30 to the original dimension, thereby releasing the second tube 40 connected to the second fastener 30. At this time, the second tube 40 can be moved relative to the first tube 10 to adjust the leg 100 to a suitable length.

[0046] Specifically, the second tube 40 is inserted into the second fastener 30, that is, the second fastener 30 is sleeved on the periphery of the second tube 40, and the second tube 40 is movably sleeved in the channel 11 of the first tube 10. The outer periphery of the second tube 40 is in contact with the inner circumference of the second fastener 30. It can be understood that the inner diameters of the first tube 10, the second fastener 30 and the second tube 40 are successively reduced, and the second tube 40 can pass through the second fastener 30 and move axially in the channel 11 of the first tube 10. As mentioned above, when the radial dimension of the first end 12 of the first tube 10 becomes smaller due to the radial force, the radial dimension of the second fastener 30 becomes smaller, thereby locking the second tube 40 inside it, and then preventing the second tube 40 from moving axially in the channel 11 of the first tube 10. Since the deformation of the first notch 113 and the second notch 311 is reversible, when the force applied to the first tube 10 is removed, the deformation of the first notch 113 and the second notch 311 is restored, so that the second fastener 30 releases the locking effect on the second tube 40. At this time, the second tube 40 can be moved to adjust the leg 100 to a suitable length. In this way, the second tube 40 can be locked or released at different positions in the first tube 10 by the second fastener 30. When the second fastener 30 locks the second tube 40, the second tube 40 is fixed relative to the first tube 10; when the second fastener releases the second tube, the second tube 40 can move axially relative to the first tube 10 in the channel 11.

[0047] In this embodiment, the first fastener 20 is used to change the radial dimension of the first end 12 .

[0048] In this embodiment, please refer to Figure 4 and Figure 5 The inner circumferential surface of the first fastener 20 is provided with a boss 201 extending in the circumferential direction. The boss 201 is used to cooperate with the protrusion 313 of the second fastener 30 to limit the second fastener 30 in the axial direction. The boss 201 is also used to cooperate with the transverse groove 1133 of the first notch 113 of the first tube 10 to limit the first fastener 20. In this embodiment, the boss 201 is used to be accommodated in the transverse groove 1133 of the first notch 113 of the first tube 10. In this embodiment, the boss 201 abuts against the end surface 3131 of the protrusion 313. Specifically, in this embodiment, the boss 201 limits the protrusion 313 in the area on one side of the transverse groove 1133 of the longitudinal notch 1131.

[0049] Please refer to Figure 8In another embodiment, at least one side of the circumference of the projection 313 is provided with a slot 3133, and there are two bosses 201, and each boss 201 is partially inserted into the slot 3133 and partially inserted into the transverse groove 1133. At this time, the distance L1 between the end of the longitudinal notch 1131 away from the first end 12 and the transverse groove 1133 may be less than the axial length L2 of the projection 313, and at this time, the projection 313 is not completely located in the area between the end of the longitudinal notch 1131 away from the first end 12 and the transverse groove 1133. It can be understood that there may also be one boss 201, and when there is one boss 201, there is only one transverse groove 1133 and one slot 3133.

[0050] Please refer to Fig. 9 and Fig.10 , the first fastener 20 of this embodiment includes an elastic ring 21. The elastic ring 21 includes an enclosed section 211 and two free sections 212 in the circumferential direction. The enclosed section 211 is connected between the two free sections 212. The two free sections 212 are spaced apart from each other and form a third notch 213. When the distance between the two free sections 212 is changed, that is, when the circumferential width of the third notch 213 is changed, the radial dimension of the enclosed section 211 also changes. Among them, the enclosed section 211 is arc-shaped, and it is sleeved on the outer periphery of the first end 12. The inner circumferential surface of the enclosed section 211 can abut against the outer circumferential surface of the first end 12. Specifically, the above-mentioned boss 201 is arranged on the inner circumferential surface of the enclosed section 211 of the elastic ring 21 of the first fastener 20.

[0051] Specifically, the first fastener 20 also includes a pull button assembly connected to the elastic ring 21, which is used to adjust the tightness of the elastic ring 21. The pull button assembly includes a tensioning shaft 22, a pull button 23, a rotating shaft 24 and a spring 25. The tension of the elastic ring 21 can be changed by the rotating shaft 24 and the pull button 23 being movably matched to pull the tensioning shaft 22.

[0052] Specifically, the trigger 23 includes a handle 232 for a user to operate and pivot, and a biasing portion 231 disposed at a transverse end of the handle 232. The thickness of the biasing portion 231 in a direction perpendicular to the transverse direction is greater than the thickness of the handle 232 in the direction. In this embodiment, the cross section of the biasing portion 231 is drop-shaped, and it abuts against one of the free sections 212 of the elastic ring 21 and the connection between it and the enclosed section 211. The handle 232 extends along the circumference of the enclosed section 211. The biasing portion 231 is provided with a first through hole 2311 that penetrates axially and a second through hole 2312 that penetrates radially. The first through hole 2311 and the second through hole 2312 are connected. A columnar rotating shaft 24 is disposed in the first through hole 2311. The rotating shaft 24 is also provided with a third through hole 241 that penetrates radially. The second through hole 2312 and the third through hole 241 are coaxial. The two free sections 212 of the elastic ring 21 are respectively provided with fourth through holes 2121 for the tensioning shaft 22 to pass through. The tensioning shaft 22 passes through the fourth through hole 2121 of the two free sections 212 in sequence, and then passes through the second through hole 2312 of the biasing portion 231, and is connected to the rotating shaft 24 at the third through hole 241. A spring 25 is sleeved on the outer periphery of the tensioning shaft 22, and the two ends of the spring 25 are respectively abutted between the two free sections 212 of the first fastener 20. When the pull button 23 is tightened, the rotating shaft 243 pulls the tensioning shaft 22, so that the two free sections 212 are close to each other, thereby contracting the first end 12, and then locking the second tube 40 to the first tube 10 as described above. When the pull button 23 is pulled in the opposite direction, the spring 25 returns to its original position, and the two ends of the spring 25 push the corresponding two free sections 212 away, and then the second fastener 20 recovers its deformation, thereby unlocking the second tube 40 from the first tube 10. At this time, the second tube 40 can be axially moved in the first tube 10, and when the required length of the leg 100 is obtained, the pull button 23 can be tightened again to lock the second tube 40 again.

[0053] It is understandable that in other embodiments, the buckle assembly can also be replaced by a bolt, that is, the head of the bolt abuts against the outside of one of the free sections, the screw rod passes through the through holes of the two free sections in sequence and is connected to the nut, and the two free sections are brought closer to each other by relatively tightening the bolt and nut; conversely, the two free sections can be moved away from each other by loosening the bolt and nut, thereby changing the diameter of the elastic ring and further changing the radial size of the first end of the first tube. Similarly, a spring can also be sleeved on the bolt, and the spring is located in front of the two free sections to provide abutment force for the two free sections.

[0054] Preferably, a wear-resistant sheet 26 is further provided between the pull button 23 and the adjacent free section 212. The wear-resistant sheet 26 is provided with a fifth through hole 261 which penetrates radially, for allowing the tensioning shaft 22 to pass through. Further preferably, a sixth through hole 2122 which penetrates radially is further provided on the free section 212 adjacent to the wear-resistant sheet 26. A second protrusion 263 is correspondingly provided on the wear-resistant sheet 26. When the wear-resistant sheet 26 is located between the pull button 23 and the corresponding free section 212, the wear-resistant sheet 26 is engaged with the sixth through hole 2122 of the free section 212 through the second protrusion 263. The rotation of the pull button 23 will not move the wear-resistant sheet 26. Preferably, two sixth through holes 2122 are provided, which are respectively provided at the axial ends of the fourth through hole 2121. Correspondingly, there are also two second protrusions 263.

[0055] When assembling the support leg 100 of this embodiment, the second fastener 30 can be first inserted into the inner side of the first end 12 of the first tube 10 from the opening 111, and the protrusion 313 of the second fastener 30 can be inserted into the longitudinal notch 1131 of the first notch 113 of the first end 12 of the first tube 10, thereby limiting the second fastener 30 in the circumferential direction; then the first fastener 20 is sleeved on the outer side of the first end 12, so that the boss 201 is accommodated in the transverse groove 1133 of the first notch 113 of the first end 12 of the first tube 10, thereby limiting the second fastener 30 in the axial direction; then the second tube 40 is inserted into the second fastener 30, and the buckle 23 is tightened to lock the second tube 40.

[0056] The leg 100 of this embodiment may further include a third tube and more sleeves. The multiple sleeves are sleeved in sequence and can move relative to each other. The two connected sleeves are connected by a set of the first fasteners and the second fasteners mentioned above. Each set of the first fasteners and the second fasteners can lock and limit the relative movement between the two connected sleeves, or release the restriction on the relative movement of the two sleeves. The number of sleeves of the leg 200 of this embodiment is 5. In other embodiments, the number of sleeves may be less than 5 or more than 5.

[0057] In this embodiment, the leg 100 further includes a support pad 60, which is connected to the innermost sleeve and is located at an end of the leg 100 away from the support portion 400. The support pad 60 supports the leg 100 on a table or the ground.

[0058] In the supporting leg and photographic tripod of the present application, the radial dimension of the first end of the first tube can be changed by applying force to the first fastener, thereby changing the radial dimension of the second fastener, thereby locking or releasing the second tube, and the operation is convenient; and during assembly, the second fastener and the first fastener are directly sleeved inside and outside the first tube respectively, and the second tube is sleeved into the second fastener, and the assembly is also very convenient.

[0059] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. A leg of a photography tripod, characterized in that: include: A first tube, defined with a first end and a second end opposite to each other in the axial direction, a passage penetrating in the axial direction is formed in the first tube, the passage forms an opening at the first end, the first end is provided with a first notch extending from the opening toward the second end, the first notch includes a longitudinal notch and a transverse groove intersecting the longitudinal notch; A first fastener is disposed on the outer side of the first end and is used to change the radial dimension of the first end. A boss is provided on the inner circumference of the first fastener, and the boss is used to cooperate with the transverse groove of the first notch of the first tube to define the first fastener; a second fastener, disposed on the inner side of the first end, the radial dimension of the second fastener being adjustable, a protrusion being provided on the outer peripheral surface of the second fastener, the protrusion cooperating with the longitudinal notch of the first notch of the first tube to circumferentially limit the second fastener, and the boss cooperating with the protrusion to axially limit the second fastener; A second tube is movably sleeved in the passage of the first tube and is locked or released at different positions in the first tube by the second fastener; The radial dimension of the second fastener changes with the radial dimension of the first end, so that the second fastener locks or releases the second tube.

2. The leg according to claim 1, characterized in that: The projection is located in a region between an end of the longitudinal notch away from the first end and the transverse groove.

3. The leg according to claim 2, characterized in that: An end surface is formed at one end of the protrusion along the axial direction, and the boss abuts against the end surface of the protrusion.

4. The leg according to claim 1, characterized in that: The protrusion is inserted into the longitudinal notch, and two side edges opposite to each other are formed on both sides of the longitudinal notch in the circumferential direction. The circumferential position of the protrusion is limited by the two side edges in the circumferential direction.

5. The leg according to claim 1, characterized in that: At least one side of the circumference of the protrusion is provided with a groove, and part of the boss is inserted into the groove, and part of the boss is inserted into the transverse groove.

6. The leg according to claim 1, characterized in that: The number of the first notches and the number of the protrusions are both two, the two first notches are arranged at an interval of 180° along the circumference of the first tube, and the two protrusions are arranged at an interval of 180° along the circumference of the second fastener.

7. The leg according to claim 1, characterized in that: The transverse groove is arranged perpendicular to the longitudinal notch.

8. The leg according to claim 1, characterized in that: The first fastener includes an elastic ring, a pull button, a rotating shaft and a tensioning shaft. The elastic ring is sleeved on the outer periphery of the first end, the pull button abuts against the outer periphery of the elastic ring, the rotating shaft is rotatably set on the pull button and is connected to the elastic ring through the tensioning shaft. When the pull button is rotated, the elastic ring is clamped or loosened by the tensioning shaft, thereby changing the radial size of the first end.

9. The leg according to claim 1, characterized in that: The second fastener is provided with a second notch, and the second notch radially penetrates the second fastener so that the second fastener is at least partially open in the circumferential direction, so that the radial size of the second fastener can be adjusted.

10. A photography tripod, characterized in that: The invention comprises a photographic platform and one or more legs as described in any one of claims 1 to 9.

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