One-step locking tripod

Abstract

One-step locking tripod, comprising: a fixing part and at least one leg connected to the fixing part, the leg including a first section, a second section and a third section connected in sequence, each section being axially movable relative to other sections; an operating assembly provided at one of the sections; a first transmission assembly connected to the operating assembly; a first locking assembly fixedly provided at the second section and slidably connected to the first section, and the first locking assembly being connected to the first transmission assembly; a second transmission assembly connected to the first locking assembly and slidably passing through the inner cavity of the second section; a second locking assembly provided at the third section and connected to the second transmission assembly; wherein, the first locking assembly is axially moved by the first transmission assembly to lock or release the first section relative to the second section, and at the same time, the first locking assembly drives the second locking assembly to axially move through the second transmission assembly to lock or release the third section relative to the second section.

Description

Technical Field

[0001] The present invention relates to the technical field of photographic equipment, and particularly to a one-step locking tripod. Background Art

[0002] Photographic tripods are commonly used devices in photography and videography, which can provide stable and horizontal support for cameras. In order to reduce the volume for easy storage, existing photographic tripods usually adopt multi-stage pipe fittings, and the lengths of the expanded tripods are adjusted by connecting the pipe fittings of each stage end to end through joints. However, since each joint needs to be locked or unlocked, the operation of the tripod is rather troublesome. Currently, photographic tripods that can be quickly locked and expanded have been developed. By arranging a transmission component to act on the multi-stage pipe fittings simultaneously, the step-by-step operation of multiple joints can be avoided. However, the transmission components of these photographic tripods have complex structures and a large number of materials, resulting in high manufacturing costs and inconvenient operation. Summary of the Invention

[0003] In view of this, an object of the present invention is to provide a one-step locking tripod to improve the above problems or at least solve the above technical problems to a certain extent.

[0004] The present invention provides a one-step locking tripod, including a fixed part and at least one leg connected to the fixed part. The leg includes: a first section, a second section, and a third section connected in sequence along the axial direction. Each section can axially move relative to other sections to elongate or shorten the tripod; an operation component disposed at one of the sections; a first transmission component connected to the operation component; a first locking component fixedly disposed at the second section and slidably connected to the first section, and the first locking component is connected to the first transmission component; a second transmission component connected to the first locking component and slidably passing through the inner cavity of the second section; a second locking component disposed at the third section and connected to the second transmission component, and the second transmission component is spaced from the first transmission component. Wherein, when the operation component is operated, the first locking component is driven by the first transmission component to axially move, locking or releasing the first section relative to the second section. At the same time, the axial movement of the first locking component drives the second transmission component together with the second locking component to axially move, locking or releasing the third section relative to the second section, thereby realizing one-step locking or releasing of each section of the tripod.

[0005] In some embodiments, the operation component is disposed at an end of the first section away from the second section.

[0006] In some embodiments, the first transmission assembly includes a transmission rod extending along the axial direction, a hollow screw sleeved on the outer periphery of the transmission rod, and a fixing nut threadedly connected to the outer periphery of the hollow screw. The hollow screw is also connected to the first locking assembly. The operating assembly is used to drive the transmission rod to rotate. The fixing nut is fixed relative to the first locking assembly. When the transmission rod rotates, the hollow screw moves axially under the combined action of the transmission rod and the fixing nut, driving the first locking assembly to move axially.

[0007] In some embodiments, the hollow screw and the transmission rod are in shape - fit socket connection. When the transmission rod rotates, the hollow screw rotates therewith.

[0008] In some embodiments, the first locking assembly includes a locking base, an adjusting block and a locking block movably arranged in the locking base. The adjusting block is connected to the second transmission assembly, and the adjusting block is provided with an axially - penetrating through - hole. The hollow screw passes through the through - hole from bottom to top and is threadedly connected to the fixing nut. The bottom end of the hollow screw abuts against the bottom end of the adjusting block. The locking block is arranged between the adjusting block and the first section. When the transmission rod drives the hollow screw to move axially, the hollow screw drives the adjusting block to move together therewith. The adjusting block acts on the locking block to drive it to approach or move away from the first section. At the same time, the adjusting block generates an axial acting force on the second transmission assembly.

[0009] In some embodiments, the adjusting block includes a rising slider, a jacking slider and a supporting slider arranged in sequence along the axial direction. The jacking slider has a jacking part exposed outside the locking base. The supporting slider is fixed to the locking base through the jacking part. When acting on the jacking part, the jacking slider can drive the rising slider to move axially.

[0010] In some embodiments, the first section includes two first row - pipes arranged at intervals on both sides of the transmission rod. The second section includes two second row - pipes arranged at a lateral interval. The second row - pipe can move axially to between the transmission rod and the corresponding first row - pipe. The third section includes a third row - pipe. The third row - pipe can move to be sleeved on the outer periphery of the transmission rod.

[0011] In some embodiments, the second section further includes a middle shaft that is hollow and extends along the axial direction. The third row - pipe can move to the inner wall of the middle shaft.

[0012] In some embodiments, the second transmission assembly is a cable. The adjusting block is provided with an axially - penetrating perforation. One end of the cable is connected to the second locking assembly, and the other end sequentially passes through the inner wall of a second row - pipe, the perforation and the inner wall of another second row - pipe, and is connected to the second section.

[0013] In some embodiments, the second locking assembly includes a locking ring and a locking member. The locking ring is sleeved on the outer periphery of the third row of pipes. The locking ring further has two spaced free ends. The locking member is connected to one end of the cable, and the locking member is provided with a locking cavity. The two free ends are received in the locking cavity. When the cable exerts an axial force on the locking member, the cavity wall of the locking cavity drives the two free ends to approach or separate from each other, so that the locking ring locks or releases the third row of pipes.

[0014] The one-step locking type tripod of the embodiment of the present application realizes locking or releasing of the first and second sections respectively by providing the first locking assembly and the second locking assembly; by providing the first transmission assembly and the second transmission assembly, the action of the operating assembly can be transmitted to the first locking assembly and the second locking assembly simultaneously, so as to realize one-step locking of the leg; in addition, the second transmission assembly slidably penetrates through the second section, making the overall shape simple and the operation easy. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 FIG. shows the structural schematic diagram of the one-step locking type tripod of the embodiment of the present invention in the unfolded state.

[0016] Figure 2 FIG. shows Figure 1 the structural schematic diagram of the one-step locking type tripod in the retracted state.

[0017] Figure 3 FIG. shows Figure 1 the structural schematic diagram of the leg of the one-step locking type tripod.

[0018] Figure 4 FIG. shows Figure 3 the internal structural schematic diagram of the first base of the leg.

[0019] Figure 5 FIG. shows Figure 3 the exploded structural schematic diagram of the first base of the leg.

[0020] Figure 6 FIG. shows Figure 3 the structural schematic diagram of the first transmission assembly and the first locking assembly of the leg.

[0021] Figure 7 FIG. shows Figure 6 the structural schematic diagram of the transmission rod and the hollow screw of the leg.

[0022] Figure 8 FIG. shows Figure 3 the structural schematic diagram of the first locking assembly of the leg.

[0023] Figure 9 FIG. showsFigure 8 Schematic cross-sectional structure diagram of the hollow screw of the outrigger, fixed nut and adjusting block.

[0024] Figure 10 Shows Figure 8 Schematic structure diagram of the adjusting block of

[0025] Figure 11 Shows Figure 10 Exploded structure diagram of the adjusting block of

[0026] Figure 12 Shows Figure 3 Schematic structure diagram of the second transmission assembly and the second locking assembly of the outrigger of

[0027] Figure 13 Shows Figure 12 Schematic cross-sectional diagram of the locking member and the locking ring of

[0028] Reference numerals: 300, tripod; 100, outrigger; 200, fixing part; 10, first section; 11, first row of pipes; 12, first base; 13, second base; 131, fourth hole; 132, sixth hole; 20, second section; 21, second row of pipes; 22, third base; 221, fifth hole; 23, central axis; 30, third section; 31, third row of pipes; 32, support seat; 40, operation assembly; 41, support part; 42, pin shaft; 421, first bevel gear; 43, handle; 50, first transmission assembly; 51, transmission rod; 511, second bevel gear; 52, hollow screw; 521, central hole; 522, upper section; 5221, external thread; 523, middle section; 524, lower section; 53, fixed nut; 60, first locking assembly; 61, locking base; 611, first hole; 612, second hole; 613, third hole; 62, adjusting block; 621, through hole; 622, 13 rising slider; 6221, first abutting surface; 6222, accommodating cavity; 6223, groove; 623, support slider; 6231, thread; 624, perforation; 625, ejecting slider; 6251, fifth abutting surface; 6252, ejecting part; 63, locking block; 631, second abutting surface; 632, curved surface; 64, screw; 70, second transmission assembly; 80, second locking assembly; 81, locking ring; 811, sleeved section; 812, free section; 8121, fourth abutting surface; 82, locking member; 821, locking cavity; 8221, third abutting surface; 83, elastic member; 84, cable adjuster; 841, adjusting knob. Detailed implementation manners

[0029] Next, in conjunction with the accompanying drawings, the technical solutions in the embodiments of the present application will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present application.

[0030] It should be noted that when a component is referred to as being "connected" to another component, it can be directly connected to the other component or there may also be an intermediate component. When a component is considered to be "disposed on" another component, it can be directly disposed on the other component or there may be an intermediate component at the same time.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs. The terms used in the description of this application in this specification are only for the purpose of describing specific embodiments, and are not intended to limit this application.

[0032] It should also be noted that the orientation terms such as up, down, inside, and outside in this embodiment are only relative concepts to each other or are referenced based on the normal use state of the product, and should not be considered restrictive.

[0033] First, refer to Figures 1 - 3 and Figure 12 , this embodiment provides a tripod 300, which includes a fixing part 200 and at least one leg 100 connected to the fixing part 200. The fixing part 200 is located above the leg 100 and is used to support a camera or video equipment. In other embodiments, the fixing part 200 can also be used to fix or support electronic devices or other objects to be supported. The leg 100 can be extended or retracted to the required length. In this embodiment, the number of the legs 100 is three. In other embodiments, the number of the legs 100 can also be one (i.e., the tripod is a monopod) or multiple. It can be understood that the fixing part 200 can also be provided with a locking member, and when the multiple legs 100 are unfolded to the required angles, the legs 100 are fixed through the locking member.

[0034] The leg 100 includes: a first section 10, a second section 20, and a third section 30 connected in sequence along the axial direction (the axial direction herein refers to the axial direction of the leg 100), and each section can axially move relative to other sections to extend or shorten the tripod 300;

[0035] An operating component 40, disposed at one of the sections;

[0036] A first transmission component 50, connected to the operating component 40;

[0037] The first locking assembly 60 is fixedly arranged at the second section and is slidably connected to the first section 10. The first locking assembly 60 is connected to the first transmission assembly and is used to lock or release the first section 10.

[0038] The second transmission assembly 70 is connected to the first locking assembly 60 and slidably penetrates through the inner cavity of the second section 20. The second transmission assembly 70 is arranged at an interval from the first transmission assembly 50.

[0039] The second locking assembly 80 is arranged at the third section 30 and is connected to the second transmission assembly 70 and is used to lock or release the third section 30.

[0040] Wherein, when the relative length of the support leg 100 needs to be adjusted, the operation assembly 40 is pulled. It drives the first locking assembly 60 to generate an axial movement through the first transmission assembly 50, locking or releasing the first section 10 relative to the second section 20. At the same time, the first locking assembly 60 generates an axial acting force on the second transmission assembly 70, driving the second locking assembly 80 to generate an axial movement, locking or releasing the third section 30 relative to the second section 20, so as to realize locking or releasing each section of the tripod 200 in one step. The whole operation process is simple and convenient.

[0041] Specifically, referring again to Figures 1 to 3 , the first section 10 of the support leg 100 is connected to the fixing part 200. The first section 10 includes two first row pipes 11 extending axially, as well as a first base 12 and a second base 13. Among them, the first base 12 is connected to the fixing part 200. The first base 12 is in a box shape and has a cover body (not marked) and a bottom shell 121. The cover body and the bottom shell 121 jointly define a receiving cavity (not marked). Among them, the first section 10 and the first transmission assembly 50 extend out of the receiving cavity. The lengths of the two first row pipes 11 are the same, and they are arranged parallel to each other and at intervals in the transverse direction (the transverse direction in this article is perpendicular to the axial direction). The tops of the two first row pipes 11 are respectively fixedly connected to the first base 12, and the bottoms of the two first row pipes 11 are respectively fixedly connected to the second base 13, so that the two first row pipes 11 are fixed axially and transversely through the first base 12 and the second base 13.

[0042] The operation assembly 40 is used to control the locking and releasing of the support leg 100. As shown in Figure 4As shown, the operation component 40 includes a support portion 41 disposed in the accommodation cavity of the first base 12, a pin shaft 42 rotatably fixed to the support portion 41, and a handle 43 connected to the pin shaft 42. The support portion 41 protrudes from the bottom case 121. The support portion 41 has two laterally spaced and opposite pin holes (not shown). The pin shaft 42 is hinged to the support portion 41 through the pin holes. A first bevel gear 421 is circumferentially provided on the pin shaft 42, and the lateral two ends of the pin shaft 42 pass through the corresponding pin holes. The bottom case 121 is further provided with a window 1211. One end of the handle 43 is connected to the pin shaft 42, and the other end extends out through the window 1211. The handle 43 can rotate upward and downward. When the handle 43 is rotated, the handle 43 drives the pin shaft 42 to rotate, and the first bevel gear 421 thereon rotates forward or backward. Preferably, a limiting member is also movably provided in the first base 12, and is disposed close to the first bevel gear 421. When the limiting member moves to abut against the first bevel gear 421, the rotation of the pin shaft 42 and the handle 43 is limited. By providing the limiting member, the handle 43 can be effectively prevented from being accidentally touched.

[0043] In this embodiment, the operation component 40 is disposed on the first base 12 of the first section 10. After the support leg 100 is unfolded, the handle 43 of the operation component 40 is close to the user's hand, so that the user can operate the handle 43 without bending down. This position setting is more ergonomic, labor-saving and convenient. It can be understood that in other embodiments, the operation component 40 can also be disposed at other positions, such as on the second section 20.

[0044] The first transmission component 50 is disposed at the first section 10 and is located between the two first row pipes 11. The first transmission component 50 is respectively connected to the operation component 40 and the first locking component 60, and is used to transmit the acting force of the operation component 40 to the first locking component 60. With reference to Figures 4 - 6 , the first transmission component 50 includes a transmission rod 51 extending along the axial direction, a hollow screw 52 sleeved on the outer periphery of the transmission rod 51, and a fixing nut 53 threadedly connected to the hollow screw 52. The upper end of the transmission rod 51 in the axial direction passes through the first base 12 and is connected to the pin shaft 42 of the operation component 40, and its lower end in the axial direction slides through the second base 13. A second bevel gear 511 meshing with the first bevel gear 421 is circumferentially provided at the upper end of the transmission rod 51, and the first bevel gear 421 and the second bevel gear 511 are vertically arranged. When the operation handle 43 drives the pin shaft 42 to rotate, the first bevel gear 421 rotates and drives the second bevel gear 511 to rotate, thereby converting the rotation of the pin shaft 42 into the rotation of the transmission rod 51 around its central axis. Preferably, as Figure 4As shown, a fixing ring 123 may also be provided on the bottom case 121 of the first base 12 near the second bevel gear 511. The transmission rod 51 passes through the fixing ring 123 and is fixed to the first base 12, thereby strengthening the stability of the transmission rod 51. The outer periphery of the hollow screw 52 is provided with a transverse external thread 5221 and is threadedly connected with a fixing nut 53. When the transmission rod 51 rotates, it drives the hollow screw 52 to rotate. Since the hollow screw 52 is threadedly connected with the fixing nut 53, under the action of the fixing nut 53, the hollow screw 52 can axially move relative to the fixing nut 53.

[0045] Specifically, as Figure 7 shown, in this embodiment, the transmission rod 51 is a special-shaped column, and its cross-section is non-circular. The cross-section of the central hole 521 of the hollow screw 52 is also non-circular and is adapted to the cross-sectional shape of the transmission rod 51. For example, the transmission rod 51 may be a triangular prism, a polygonal prism, an elliptical cylinder, a star-shaped column or a column with other irregular structures. Correspondingly, the cross-section of the central hole 521 of the hollow screw 52 may be triangular, polygonal, elliptical, star-shaped or other irregular shapes, so that when the transmission rod 51 rotates, the hollow screw 52 rotates accordingly, and the hollow screw 52 can axially move along the transmission rod 51. It can be understood that in other embodiments, the transmission rod 51 and the hollow screw 52 can also be circumferentially positioned relative to each other by means of a concave-convex matching structure or other structures.

[0046] Please refer to Figures 6 - 8 , the hollow screw 52 is in an inverted T shape and is axially divided into an upper section 522, a middle section 523 and a lower section 524 which are sequentially connected. The upper section, the middle section and the lower section jointly define the central hole 521 of the hollow screw 52. The upper section of the hollow screw 52 has an external thread 5221, the middle section can be in a smooth cylindrical shape, and the transverse dimension of the lower section is larger than the transverse dimension of the middle section. The fixing nut 53 has an internal thread (not shown) meshing with the external thread 5221, and it meshes with the external thread 5221 of the upper section of the hollow screw 52. And the axial length of the external thread 5221 of the hollow screw 52 is greater than the axial length of the internal thread of the fixing nut 53, so that the fixing nut 53 can move a certain distance on the hollow screw 52. The fixing nut 53 is fixedly connected with the first locking assembly 60. When the transmission rod 51 rotates, the hollow screw 52 is driven to rotate along the internal thread of the fixing nut 53, so as to axially move relative to the fixing nut 53.

[0047] In this embodiment, through the gear and thread cooperation between the operating component 40 and the first transmission component 50, the acting force on the handle 43 is transferred to the first locking component 60, causing it to move axially. It can be understood that in other embodiments, the operating component 40 can be of other structures, as long as it can cause the first locking component to have an axial displacement. For example, the operating component is a wrench that can be pulled left and right, and the wrench is directly connected to the transmission rod to rotate the transmission rod. Even the operating component and the first transmission component can be integrated into one body. For example, both are set as a push rod that can move axially, and the first locking component 60 is provided with an axial acting force by axially moving the push rod.

[0048] The first locking component 60 is arranged at the first section 10 for locking or releasing the first section 10. As Figure 6 and Figure 8 shown, the first locking component 60 includes a locking base 61, and an adjusting block 62 and a locking block 63 movably arranged in the locking base 61. The locking base 61 is in a box shape, and is provided with a first channel 611 and a second channel 612 that penetrate axially and are spaced transversely. Among them, the first channel 611 is located in the middle of the locking base 61 for the transmission rod 51 to pass through. There are two second channels 612, which are respectively arranged on the left and right sides of the first channel 611 for the corresponding first row of pipes 11 to pass through. Through the above settings, the locking base 61 slidably penetrates the outer peripheries of the two first row of pipes 11 and the transmission rod 51.

[0049] The hollow screw 52 and the fixing nut 53 of the first transmission component 50 are also located in the locking base 61, and a screw 64 is provided in the locking base 61, and the fixing nut 53 is fixed to the locking base 61 by the screw 64. The adjusting block 62 is located below the fixing nut 53, and the adjusting block 62 is provided with an axially penetrating through hole 621. The hollow screw 52 passes through the through hole 621 of the adjusting block 62 from bottom to top, and its upper section 522 is exposed outside the through hole 621 and is screwed with the fixing nut 53. The diameter of the lower section 524 of the hollow screw 52 is larger than the diameter of the through hole 621, so that its lower section 524 abuts against the bottom wall of the locking base 61. When the transmission rod 51 is rotated, the hollow screw 52 moves axially, and the lower section 524 of the hollow screw 52 drives the adjusting block 62 to move together.

[0050] Refer to again Figure 6 and Figure 8, first abutting surfaces 6221 are provided at both the left and right ends of the adjusting block 62. The first abutting surfaces 6221 are inclined surfaces, and the two first abutting surfaces 6221 approach each other in the upward direction and are relatively far apart in the downward direction, such that the adjusting block 62 generally has a trapezoidal prism shape. There are also two locking blocks 63, which are respectively arranged between the adjusting block 62 and the corresponding first row of pipes 11. Curved surfaces 632 and second abutting surfaces 631 are respectively provided on the left and right sides of the locking block 63, wherein the curved surface 632 is used to fit with the outer wall of the corresponding first row of pipes 11, and the second abutting surface 631 is used to cooperate with the first abutting surface 6221. When the adjusting block 62 moves axially upward, the first abutting surface 6221 of the adjusting block 62 acts on the second abutting surface 631 of the locking block 63, causing the locking block 63 to move laterally, so that the curved surface 632 of the locking block 63 approaches the corresponding first row of pipes 11, and the first row of pipes 11 is pressed against the pore wall of the second pore passage 612, realizing the locking of the first row of pipes 11. At this time, the first row of pipes 11 is locked relative to the second section 20. When the adjusting block 62 moves axially downward, the first abutting surface 6221 of the adjusting block 62 separates from the second abutting surface 631 of the locking block 63, and the curved surface 632 of the locking block 63 releases the abutment against the first row of pipes 11. At this time, the first row of pipes 11 can axially move relative to the second section 20, and the user can adjust it to the required position.

[0051] Among them, in this embodiment, it is set that when the handle 43 is rotated upward, the first transmission assembly 50 rotates and drives the adjusting block 62 to move axially upward, such that the locking block 63 approaches and presses against the first row of pipes 11. On the contrary, when the handle 43 is rotated downward, the locking block 63 moves away from the first row of pipes 11, releasing the abutment against the first row of pipes 11.

[0052] The second section 20 is connected to the first section 10. The second section 20 includes a third base 22 and two axially extending second rows of pipes 21. The lengths of the two second rows of pipes 21 are the same, and they are arranged parallel to each other and spaced apart laterally. The tops of the two second rows of pipes 21 respectively pass through the second base 13 and are fixedly connected to the locking base 61. The bottoms of the two second rows of pipes 21 are respectively fixedly connected to the third base 22, such that the two second rows of pipes 21 are fixed laterally. Referring again to Figure 6, the locking base 61 is provided with axially penetrating third channels 613. There are two third channels 613, which are respectively arranged between the first channel 611 and the corresponding second channel 612 for fixing the second row of pipes 21. The second base 13 is provided with axially penetrating fourth channels 131. There are also two fourth channels 131, which are axially aligned and communicated with the corresponding third channels 613 respectively. The tops of the two second rows of pipes 21 slide through the corresponding fourth channels 131 and are respectively fixed in the two third channels 613 of the locking base 61, so that the locking base 61 can be axially moved to drive the second row of pipes 21 to axially move on the first section 10, realizing the telescoping of the first section 10 and the second section 20. In this embodiment, the first row of pipes 11 and the second row of pipes 21 are arranged at a lateral interval, which is convenient for the telescoping of the first section 10 and the second section 20. In other embodiments, the first row of pipes 11 and the second row of pipes 21 may also be sleeved with each other.

[0053] The second transmission assembly 70 is connected to the adjustment block 62 for transmitting the axial action of the adjustment block 62 to the third section 30. In this embodiment, the second row of pipes 21 is a hollow rod, and the second transmission assembly 70 axially passes through the inner wall of the second row of pipes 21. Specifically, the second transmission assembly 70 is a cable with a certain rigidity. The adjustment block 62 is provided with an axially penetrating through hole 624 for the cable to pass through. The cable is in an inverted U shape, one end of which is connected to the third base 22, and the other end sequentially passes through the inner wall of the corresponding second row of pipes 21, the through hole 624 and the inner wall of the other second row of pipes 21, and is connected to the third base 22 again. The structure of the cable is slender and convenient for storage, and it integrally passes through the adjustment block and is received in the inner walls of the two second rows of pipes, making the overall structure simple and having high transmission efficiency. In other embodiments, the second transmission assembly 70 may also adopt other structures to transmit the acting force, such as steel wires, steel bars or connecting rods, etc.

[0054] The second locking assembly 80 is arranged in the third base 22 for locking or releasing the third section 30. As Figure 12 and Figure 13As shown, the second locking assembly 80 includes a locking ring 81 and a locking member 82. In this embodiment, the locking member 82 is block-shaped and connected to one end of the cable. The locking member 82 is axially arranged corresponding to one of the second row tubes 21, and is provided with a locking cavity 821 facing the other second row tube 21. The locking cavity 821 is defined by a cavity wall. The cavity wall has two third abutment surfaces 8221 symmetrically arranged along its axial direction. The locking ring 81 is Ω-shaped, including a semi-annular sleeve section 811, and two free sections 812 connected to the sleeve section 811. The sleeve section 811 is sleeved on the outer wall of the third section 30. The two free ends are close to and located in the locking cavity 821. The two free ends of the locking ring 81 are respectively provided with fourth abutment surfaces 8121 that cooperate with the third abutment surfaces 8221. The third abutting surface 8221 is axially located below the corresponding fourth abutting surface 8121, so that when the cable pulls the locking member 82 to move upward in the axial direction, the third abutting surface 8221 of the locking member 82 pushes upward against the fourth abutting surface 8121 of the locking ring 81, so that the two free ends are close to each other, thereby achieving the clamping of the locking ring 81 on the third section 30. When the tension on the cable is eliminated, the locking block 63 returns to its original position, thereby releasing the clamping of the third section 30.

[0055] Preferably, the locking member 82 may further include an elastic member 83. The elastic member 83 is connected to one end of the cable and the locking member 82, respectively. When the cable is subjected to an axial tension of the adjustment block 62, the cable pulls the locking member 82 to move axially through the elastic member 83, and the elastic member 83 is deformed. When the tension on the cable is eliminated, the elastic member 83 will restore the deformation. At the same time, the locking member 82 can return to its original position driven by the elastic member 83. The elastic member 83 of this embodiment is a spring.

[0056] The third section 30 includes a third row of tubes 31. In this embodiment, the third row of tubes 31 is a hollow rod, and the inner diameter is larger than the outer diameter of the transmission rod 51. The third row of tubes 31 is slidably connected to the second section 20 through the third base 22. Figure 12As shown, the third base 22 is provided with an axially penetrating fifth channel 221 for the third row of pipes 31 to slide through. The fifth channel 221 is located between the two second rows of pipes 21, and the sleeved section 811 of the locking ring 81 is disposed within the fifth channel 221 and sleeved around the outer circumference of the third row of pipes 31. When the locking ring 81 releases the clamping of the third row of pipes 31, the third row of pipes 31 can move axially between the two second rows of pipes 21, thereby achieving the coincidence of the third section 30 and the second section 20. When the third row of pipes 31 moves axially between the second rows of pipes 21 and then the locking base 61 of the first locking assembly 60 is axially moved, the third section 30, the second section 20 and the first section 10 can be made to coincide, thereby achieving the contraction of the entire leg 100. At this time, the transmission rod 51 moves to the inner wall of the third row of pipes 31. Optionally, a support base 32 is further provided at the bottom end of the third section 30, and foot studs can be provided at the bottom of the support base 32 to enhance the fixing effect with the ground.

[0057] Preferably, the leg 100 of the present embodiment further includes a central shaft 23 provided in the second section 20. The central shaft 23 is a hollow rod extending axially. The second base 13 is provided with an axially penetrating sixth channel 132, and the sixth channel 132 is axially aligned and communicated with the first channel 611 of the locking base 61. The upper end of the central shaft 23 is fixed within the sixth channel 132, and the lower end is fixed within the fifth channel 221. When the third section 30 and the second section 20 contract (coincide), the third row of pipes 31 can move axially to the inner wall of the central shaft 23. The setting of the central shaft 23 further enhances the stability of the support of the second section 20.

[0058] In this embodiment, by using the first locking assembly 60 and the second locking assembly 80 in combination, the leg 100 can be locked or released in one step. However, since the pressures borne by the first, second and third rows of pipes 31 are different, the wear degrees of the respective rows of pipes are also inconsistent, and it may be difficult for the upper and lower rows of pipes to be locked synchronously after long-term use. To ensure a better adjustment effect, the adjusting block 62 of this embodiment is set to the structure as shown in Figure 10 and Figure 11 shown.

[0059] The adjustment block 62 includes a rising slider 622, an ejection slider 625 and a support slider 623 which are sequentially arranged along the axial direction. The support slider 623 is block-shaped, and a support portion 6232 extending vertically upward is provided along one side thereof. The support portion 6232 is also block-shaped, and a fixing hole 6231 is provided which penetrates along its thickness direction. The ejection slider 625 is provided with an ejection portion 6252 extending from the fixing hole 6231, and the ejection portion 6252 passes through the fixing hole 6231 and extends out of the locking base 61, so as to facilitate push-pull operation thereof. The extension direction of the ejection portion 6252 is perpendicular to both the lateral direction and the axial direction. Preferably, the ejection portion 6252 passes through the back side of the locking base 61, that is, the side of the locking base 61 which faces away from the user, so as to maintain the overall aesthetics and facilitate hidden operation. The ejection slider 625 has an inclined fifth abutment surface 6251, and the fifth abutment surface 6251 faces the rising slider 622. The rising slider 622 is also block-shaped, and a receiving cavity 6222 is recessed at the bottom end thereof facing the ejection slider 625, and the aforementioned first abutment surfaces 6221 are respectively provided on the left and right sides of the top end thereof facing away from the ejection slider 625. Among them, the rising slider 622 and the supporting slider 623 jointly define an axial through hole 624 and a through hole 621. There are two axial through holes 624 arranged at intervals. A groove 6223 for accommodating a cable is provided on the top surface of the rising slider 622. The groove 6223 is arc-shaped, and two axial through holes 624 are located at both ends of the groove 6223. The closed end of the U-shaped cable is located in the groove 6223, and its two free ends respectively pass through the axial through holes 624, and pass through the corresponding inner walls of the second row of tubes 21, and then are fixedly connected to the third base 22. When the ejection portion 6252 is pushed to move along its own extension direction, the ejection slider 625 moves on the support slider 623, and through its fifth abutting surface 6251, acts on the cavity wall of the accommodating cavity 6222 of the rising slider 622, driving the rising slider 622 to move axially upward or downward, thereby acting on the locking block 63 and the cable 70 at the same time, and realizing the synchronous adjustment of the first section 10 and the third section 30. Preferably, the ejection portion 6252 is an adjustment screw threadedly connected to the ejection slider 625. And in this embodiment, it is configured that: when the adjustment screw is rotated clockwise, the ejection slider 625 pushes the rising slider upward to make it move upward, thereby driving the locking block 63 and the locking ring 81 to lock the first row of tubes 10 and the third row of tubes 30 respectively. Conversely, when the adjustment screw is rotated counterclockwise, the locking block 63 releases the abutment on the first row of tubes 11, and the locking ring 81 loosens the third row of tubes 30.

[0060] Further preferably, the locking member 82 may further include a cable adjuster 84 for adjusting the tightness of the cable. Figure 10As shown in the figure, on both sides of the fifth channel 221 of the third base 22, a seventh channel 222 and an eighth channel 223 are respectively provided for placing the locking member 82 and the cable adjuster 84. The cable adjuster 84 is provided with an adjustment knob 841 exposed outside the third base 22, and the adjustment knob 841 is connected to one end of the cable. By rotating the adjustment knob 841, the tightness of the cable can be adjusted, and thus the tightness of the locking ring 81 can be adjusted. This setting enables the third section 30 to be adjusted independently to further compensate for the insufficient adjustment accuracy of the second locking assembly 80.

[0061] The above are only the preferred specific embodiments of the present invention, and the protection scope of the present invention is not limited to the above-listed embodiments. Any simple changes or equivalent replacements of technical solutions that can be obviously obtained by those skilled in the art within the technical scope disclosed by the present invention fall within the protection scope of the present invention.

Claims

1. A one-step locking tripod, comprising: A fixing portion and at least one leg connected to the fixing portion, wherein the leg comprises: A first section, a second section and a third section connected in sequence along the axial direction, each section being capable of axially moving relative to the other sections to extend or shorten the tripod; An operating component is disposed at one of the sections; A first transmission assembly connected to the operating assembly; A first locking assembly is fixedly disposed at the second section and slidably connected to the first section, and the first locking assembly is connected to the first transmission assembly; A second transmission assembly is connected to the first locking assembly and is slidably disposed in the inner cavity of the second section, and the second transmission assembly is spaced apart from the first transmission assembly; A second locking assembly, disposed at the third section and connected to the second transmission assembly; Wherein, when the operating assembly is operated, the first transmission assembly drives the first locking assembly to move axially, locking or releasing the first section relative to the second section, and at the same time, the axial movement of the first locking assembly drives the second transmission assembly together with the second locking assembly to move axially, locking or releasing the third section relative to the second section, thereby realizing one-step locking or releasing of each section of the tripod; The third section includes a third row of tubes, the second locking assembly includes a locking ring and a locking piece, the locking piece is connected to one end of the second transmission assembly, the locking ring includes a sleeve section and two free sections located at both ends of the sleeve section, the sleeve section is sleeved on the outer circumference of the third row of tubes, wherein the locking piece is provided with a locking cavity, the two free sections are accommodated in the locking cavity, when the second transmission assembly moves axially, it drives the locking piece to move axially, and the cavity wall of the locking cavity drives the two free sections to approach or move away, so that the sleeve section locks or releases the third row of tubes.

2. The tripod according to claim 1, characterized in that: The operating component is disposed at an end of the first section away from the second section.

3. The tripod according to claim 1, characterized in that: The first transmission assembly includes a transmission rod extending axially, a hollow screw sleeved on the outer circumference of the transmission rod, and a fixing nut threadedly connected to the outer circumference of the hollow screw, the hollow screw is also connected to the first locking assembly, wherein the operating assembly is used to drive the transmission rod to rotate, when the transmission rod rotates, the fixing nut is fixed relative to the transmission rod, and the hollow screw moves axially under the joint action of the transmission rod and the fixing nut, driving the first locking assembly to move axially.

4. The tripod according to claim 3, characterized in that: The hollow screw rod is connected to the transmission rod in a form-fitting manner, and when the transmission rod rotates, the hollow screw rod also rotates accordingly.

5. The tripod according to claim 3, characterized in that: The first locking assembly includes a locking base and an adjusting block and a locking block movably arranged in the locking base, the adjusting block is connected to the second transmission assembly, and the adjusting block is provided with an axially penetrating through hole, the top end of the hollow screw passes through the through hole from bottom to top and is connected to the fixing nut, the fixing nut is fixedly arranged in the locking base, the bottom end of the hollow screw abuts against the bottom end of the adjusting block, and the locking block is arranged between the adjusting block and the first section. When the hollow screw moves axially, the adjusting block also moves axially therewith, thereby driving the locking block to approach or move away from the first section, and at the same time, the adjusting block drives the second transmission assembly to move axially.

6. The tripod according to claim 5, characterized in that: The adjusting block includes a rising slider, an ejection slider and a supporting slider which are sequentially arranged along the axial direction. The rising slider is used to cooperate with the locking block to drive it to approach or move away from the first section. The ejection slider has an ejection portion exposed from the locking base. The supporting slider is fixed to the locking base through the ejection portion. When the ejection portion is operated, the ejection slider drives the rising slider to move along the axial direction.

7. The tripod according to claim 5, characterized in that: The first section includes two first rows of tubes arranged at intervals on both sides of the transmission rod, the second section includes two second rows of tubes arranged at intervals on both sides of the transmission rod, the second row of tubes can move axially between the transmission rod and the corresponding first row of tubes, and the third row of tubes can move to be sleeved on the outer periphery of the transmission rod.

8. The tripod according to claim 7, characterized in that: The second section further comprises a hollow central shaft extending in the axial direction, and the third row of tubes can be moved to be sleeved on the inner wall of the central shaft.

9. The tripod according to claim 7, characterized in that: The second transmission component is a cable, and the adjustment block is provided with a through hole extending axially therethrough. One end of the cable is connected to the second locking component, and the other end passes through the inner wall of a second row of tubes, the through hole and the inner wall of another second row of tubes in sequence, and is connected to the second section.

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