One-step locking type foot stool

Abstract

The one-step locking type foot stool comprises a fixing part and at least one supporting leg connected with the fixing part, each supporting leg comprises a first section, a second section and a third section which are sequentially connected in the axial direction, and each section can axially move relative to other sections; the operation assembly is arranged between the sections; the first locking assembly is fixedly arranged at the second section and slidably connected with the first section, and the first locking assembly is connected with the operation assembly; the transmission part is connected with the first locking assembly and penetrates through the inner cavity of the second section in a sliding manner; the second locking assembly is arranged at the third section and is connected with the second transmission assembly; when the operation assembly is operated, the first locking assembly is driven to move axially and lock or release the first section relative to the second section, and meanwhile the axial movement of the first locking assembly drives the transmission piece to drive the second locking assembly to move axially and lock or release the third section relative to the second section. Therefore, each section of the foot stool can be locked or released in one step.

Description

Technical Field

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

[0002] A tripod is a commonly used device in photography and videography, which can provide a stable and horizontal support for the camera. In order to reduce the volume for easy storage, existing tripods usually use multi-stage pipes, and the pipes of each stage are connected end to end through joints to adjust the unfolded length. However, since each joint needs to be interlocked or unlocked, the operation of the tripod is relatively troublesome. At present, a tripod that can be quickly locked and unfolded has been developed. By setting a transmission part to act on the multi-stage pipes at the same time, the step-by-step operation of multiple joints can be avoided. However, the transmission parts of these tripods have a complex structure and a variety of materials, which makes the production cost high and the operation inconvenient. 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-mentioned problem or at least solve the above-mentioned technical problem to a certain extent.

[0004] The present invention provides a one-step locking tripod, comprising: a fixing portion and at least one leg connected to the fixing portion, characterized in that 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 other sections to extend or shorten the tripod; an operating assembly arranged between the sections; a first locking assembly fixedly arranged at the second section and slidably connected to the first section, and the first locking assembly is connected to the operating assembly; a transmission member connected to the first locking assembly and slidably penetrated in an inner cavity of the second section; a second locking assembly arranged at the third section and connected to the transmission member; wherein when the operating assembly is operated, the first locking assembly is driven to move axially to lock or release the first section relative to the second section, and at the same time, the axial movement of the first locking assembly drives the transmission member together with the second locking assembly to move axially to lock or release 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 operating component includes an operating part, a rod extending axially, a hollow screw sleeved on the outer periphery of the rod, and a fixing nut threadedly connected to the outer periphery of the hollow screw, and the hollow screw is also connected to the first locking component, wherein the operating part is used to drive the rod to rotate, and the fixing nut is fixed relative to the first locking component. When the rod rotates, the hollow screw moves axially under the joint action of the rod and the fixing nut, driving the first locking component to move axially.

[0006] In some embodiments, the hollow screw and the rod are in a shape-fitting sleeve connection, and when the rod rotates, the hollow screw also rotates therewith.

[0007] In some embodiments, 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 transmission member, 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 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, and the adjusting block drives the locking block to approach or move away from the first section, and at the same time, the adjusting block generates an axial pulling force on the transmission member.

[0008] In some embodiments, the adjustment block includes a rising slider, an ejection slider and a supporting slider arranged in sequence along the axial direction, 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, and when the ejection portion is acted on, the ejection slider drives the rising slider to move axially.

[0009] In some embodiments, the first section includes two first rows of tubes spaced apart on both sides of the rod, the second section includes two second rows of tubes spaced apart on both sides of the rod, the second rows of tubes can move axially between the rod and the corresponding first rows of tubes, and the third section includes a third row of tubes, and the third row of tubes can move to be sleeved on the outer periphery of the rod.

[0010] In some embodiments, the second section further includes a hollow and axially extending central shaft, and the third row of tubes can move to the inner wall of the central shaft.

[0011] In some embodiments, the transmission member is a cable.

[0012] In some embodiments, the adjusting member is provided with a through hole extending axially therethrough, one end of the cable is connected to the second locking assembly, 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.

[0013] In some embodiments, the second locking assembly includes a locking ring and a locking piece, the locking ring is sleeved on the outer circumference of the third row of tubes, the locking ring also has two spaced free ends, which are respectively located at both ends of the locking ring, the locking piece is connected to one end of the cable, and the locking piece is provided with a locking cavity, the two free ends are accommodated in the locking cavity, when the cable generates axial tension on the locking piece, the cavity wall of the locking cavity drives the two free ends to approach or move away, so that the locking ring locks or releases the third row of tubes.

[0014] The one-step locking tripod of the embodiment of the present application is provided with a first locking component and a second locking component to respectively lock or release the first and second sections; by providing a first transmission member and a transmission member, the action of the operating component can be transmitted to the first locking component and the second locking component at the same time, thereby achieving one-step locking of the legs; in addition, the transmission member is slidably inserted into the second section, so that the overall shape is simple and easy to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A schematic structural diagram of a one-step locking tripod in an unfolded state is shown in an embodiment of the present invention.

[0016] Figure 2 Shows Figure 1 Schematic diagram of the structure of the one-step locking tripod in the retracted state.

[0017] Figure 3 Shows Figure 1 Schematic diagram of the structure of the legs of a one-step locking tripod.

[0018] Figure 4 Shows Figure 3 Schematic diagram of the structure of the first base and transmission assembly of the leg.

[0019] Figure 5 Shows Figure 3 Schematic diagram of the exploded structure of the first base of the leg.

[0020] Figure 6 Shows Figure 3 A schematic structural diagram of the adjustment component and the first locking component.

[0021] Figure 7 Shows Figure 3 Schematic diagram of the horizontal structure of the transmission rod and the hollow screw.

[0022] Figure 8 Shows Figure 3 Another structural schematic diagram of the first locking assembly.

[0023] Fig. 9 Shows Figure 3 Schematic diagram of the connection structure between the hollow screw, the fixing nut and the adjusting block.

[0024] Fig.10 Shows Figure 3 Schematic diagram of the structure of the adjustment block.

[0025] Fig.11 Shows Fig.10 Schematic diagram of the exploded structure of the regulating block.

[0026] Fig.12 Shows Figure 3 A schematic structural diagram of the transmission member and the second locking assembly.

[0027] Fig.13 Shows Fig.12 Schematic diagram of the cross section of the locking piece and the locking ring.

[0028] Figure numerals: 300, tripod; 100, leg; 200, fixing part; 10, first section; 11, first row of pipes; 12, first base; 13, second base; 131, fourth channel; 132, sixth channel; 20, second section; 21, second row of pipes; 22, third base; 221, fifth channel; 23, middle axis; 30, third section; 31, third row of pipes; 32, support base; 40, operating assembly; 41, support part; 42, pin shaft; 421, first bevel gear; 43, operating part; 44, transmission assembly; 441, transmission rod; 4411, second bevel gear; 442, hollow screw; 4421, center hole; 4422, external thread; 443, fixing nut; 60, first locking assembly; 61, locking base; 61 1. First hole; 612. Second hole; 613. Third hole; 62. Adjustment block; 621. Through hole; 622. Rising slider; 6221. First abutting surface; 6222. Accommodating cavity; 6223. Groove; 623. Supporting slider; 6231. Thread; 624. Perforation; 625. Ejection slider; 6251. Fifth abutting surface; 6252. Ejection portion; 63. Locking block; 631. Second abutting surface; 632. Curved surface; 64. Screw; 70. Transmission member; 80. Second locking assembly; 81. Locking ring; 811. Sleeve 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. Adjustment knob. DETAILED DESCRIPTION

[0029] The following will be combined with the accompanying drawings to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

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

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application 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 directional terms such as upper, lower, inner, and outer in this embodiment are merely relative concepts or are based on the normal use status of the product and should not be considered as restrictive.

[0033] First reference Figure 1-Figure 3 and Fig.12 The present embodiment provides a tripod 300, which includes a fixing portion 200 and at least one leg 100 connected to the fixing portion 200. The fixing portion 200 is located above the leg 100 and is used to support a camera or video equipment. The leg 100 can be extended or retracted to a desired length. In the present embodiment, there are three legs 100. In other embodiments, the number of the leg 100 can also be one (i.e., the tripod is a monopod).

[0034] The leg 100 comprises: 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), each section can move axially relative to other sections to extend or shorten the leg 300;

[0035] An operating assembly 40, disposed between the sections;

[0036] A first locking assembly 60 is slidably disposed on the outer periphery of the first section 10 , and the first locking assembly 60 is respectively connected to the operating assembly 40 and the second section 20 , and is used to lock or release the first section 10 ;

[0037] A transmission member 70 is slidably sleeved in the second section 20;

[0038] The second locking assembly 80 is slidably disposed on the outer periphery of the third section 30 , and the second locking assembly 80 is respectively connected to the first locking assembly 60 and the second section 20 for locking or releasing the third section 30 .

[0039] When the relative length of the legs 100 needs to be adjusted, the operating assembly 40 is operated to drive the first locking assembly 60 to move axially, and the first section 10 is locked or released; at the same time, the first locking assembly 60 generates an axial force on the transmission member 70, driving the transmission member 70 together with the second locking assembly 80 to move axially, and the third section 30 is locked or released, thereby achieving one-step locking or releasing of the tripod 200. The entire operation process is simple and convenient.

[0040] Specifically, Figure 1 and Figure 3 As shown, the first section 10 of the leg 100 is connected to the fixing portion 200. The first section 10 includes two axially extending first rows of tubes 11, and a first base 12 and a second base 13. Among them, the first base 12 is connected to the fixing portion 200. The first base 12 is box-shaped, and has a cover body (not shown) and a bottom shell 121, and the cover body (not shown) and the bottom shell 121 together define a receiving cavity (not shown). Among them, the first section 10 and the operating assembly 40 extend from the receiving cavity. The two first rows of tubes 11 have the same length, are parallel to each other and are arranged at intervals in the transverse direction (the transverse direction in this article is perpendicular to the axial direction). The top ends of the two first rows of tubes 11 are fixedly connected to the first base 12, respectively, and the bottom ends of the two first rows of tubes 11 are fixedly connected to the second base 13, respectively, so that the two first rows of tubes 11 are fixed in the axial direction and the transverse direction by the first base 12 and the second base 13.

[0041] The operating assembly 40 is used to control the locking and releasing of the legs 100. Figure 4 As shown, the operating assembly 40 includes a support portion 41 disposed in the accommodating cavity of the first base 12, a pin 42 rotatably fixed to the support portion 41, and an operating portion 43 connected to the pin 42. The support portion 41 is convexly disposed on the bottom shell 121. The support portion 41 has two pin holes (not shown) that are spaced laterally and opposite to each other. The pin 42 is hinged on the support portion 41 through the pin holes. A first bevel gear 421 is disposed circumferentially of the pin 42, and the lateral ends of the pin 42 pass through the corresponding pin holes. The bottom shell 121 is also provided with a window 1211, one end of the operating portion 43 is connected to the pin 42, and the other end extends out of the window 1211. The operating portion 43 is, for example, a wrench, and can be rotated upward and downward. When the operating portion 43 is rotated, the operating portion 43 drives the pin 42 to rotate, and the first bevel gear 421 thereon rotates forward or reversely. Preferably, a limiter 124 that can also move axially can be provided in the first base 12, and is provided close to the first bevel gear 421. When the limiter 124 moves to abut against the first bevel gear 421, the rotation of the pin 42 and the operating part 43 is limited. The limiter 124 can effectively prevent the operating part 43 from being accidentally touched.

[0042] In this embodiment, the operating part 43 is disposed on the first base 12 of the first section 10. When the legs 100 are unfolded, the operating part 43 is close to the user's hand, so that the user can operate without bending over. This position setting is more ergonomic, labor-saving and convenient. It is understandable that in other embodiments, the operating part 43 can also be disposed in other positions, such as on the second section 20.

[0043] The operating assembly 40 also includes a transmission assembly 44 disposed at the first section 10, and the transmission assembly 44 is located between the two first rows of tubes 11. The transmission assembly 44 is connected to the pin 42 and the first locking assembly 60 respectively, and is used to transmit the force of the operating part 43 to the first locking assembly 60. Figure 4 and Figure 7 The transmission assembly 44 includes a transmission rod 441 extending axially, a hollow screw 442 sleeved on the outer periphery of the transmission rod 441, and a fixing nut 443 threadedly connected to the hollow screw 442. The axial upper end of the transmission rod 441 passes through the first base 12 and is connected to the pin 42 of the operating assembly 40, and the axial lower end thereof slides through the second base 13. The upper end of the transmission rod 441 is circumferentially provided with a second bevel gear 4411 meshing with the first bevel gear 421, and the first bevel gear 421 and the second bevel gear 4411 are vertically arranged. When the operating part 43 drives the pin 42 to rotate, the first bevel gear 421 rotates and drives the second bevel gear 4411 to rotate, thereby converting the rotation of the pin 42 into the rotation of the transmission rod 441 around its central axis. Preferably, as Figure 3 As shown, a fixing ring 123 may be further provided on the bottom shell 121 of the first base 12 near the second bevel gear 4411. The transmission rod 441 passes through the fixing ring 123 and is fixed to the first base 12, thereby enhancing the stability of the transmission rod 441. The outer periphery of the hollow screw 442 is provided with a transverse external thread 5221, and is threadedly connected with a fixing nut 443. When the transmission rod 441 rotates, it drives the hollow screw 442 to rotate. Since the hollow screw 442 is threadedly connected with the fixing nut 443, under the action of the fixing nut 443, the hollow screw 442 can move axially relative to the fixing nut 443.

[0044] Specifically, Figure 5 As shown, in this embodiment, the transmission rod 441 is a special-shaped column, and its cross section is non-circular. The cross section of the center hole 521 of the hollow screw 442 is also non-circular, and is adapted to the cross-sectional shape of the transmission rod 441. For example, the transmission rod 441 can be a triangular prism, a multi-prism, an elliptical column, a star-shaped column or other columns with irregular structures. Correspondingly, the cross section of the center hole 521 of the hollow screw 442 can be a triangle, a polygon, an ellipse, a star or other irregular shapes, so that when the transmission rod 441 is rotated, the hollow screw 442 rotates accordingly, and the hollow screw 442 can move axially along the transmission rod 441. It can be understood that in other embodiments, the transmission rod 441 and the hollow screw 442 can be positioned relative to each other in the circumferential direction by means of a concave-convex matching structure or other structures.

[0045] Reference again Figure 4 and Figure 7, the hollow screw 442 is in an inverted T-shape, and is axially divided into an upper section, a middle section and a lower section connected in sequence. The upper section, the middle section and the lower section jointly define the center hole 521 of the hollow screw 442. The upper section of the hollow screw 442 has an external thread 5221, the middle section can be smooth and cylindrical, and the lateral dimension of the lower section is greater than the lateral dimension of the middle section. The fixing nut 443 has an internal thread (not shown) meshed with the external thread 5221, which meshes with the external thread of the upper section of the hollow screw 442. And the axial length of the external thread of the hollow screw 442 is greater than the axial length of the internal thread of the fixing nut 443, so that the fixing nut 443 can move a certain distance on the hollow screw 442. The fixing nut 443 is fixedly connected to the first locking assembly 60. When the transmission rod 441 rotates, the hollow screw 442 is driven to rotate along the internal thread of the fixing nut 443, thereby moving axially relative to the fixing nut 443.

[0046] In this embodiment, the force applied to the operating portion 43 is transferred to the first locking assembly 60 to cause axial movement through the gear matching between the pin shaft and the transmission rod 441 and the thread matching between the hollow screw 442 and the transmission rod 441. It can be understood that in other embodiments, the operating assembly 40 can be other structures as long as the first locking assembly 60 can produce axial displacement.

[0047] The first locking assembly 60 is disposed at the first section 10 and is used to lock or release the first section 10. Figure 4 and Figure 6 As shown, the first locking assembly 60 includes a locking base 61 and an adjustment block 62 and a locking block 63 movably arranged in the locking base 61. The locking base 61 is box-shaped and is provided with a first hole 611 and a second hole 612 that penetrate along the axial direction and are arranged at intervals in the transverse direction. The first hole 611 is located in the middle of the locking base 61 and is used for the transmission rod 441 to pass through. There are two second holes 612, which are respectively arranged on the left and right sides of the first hole 611, and are used for the corresponding first row of pipes 11 to pass through. Through the above arrangement, the locking base 61 is slidably penetrated on the outer periphery of the two first rows of pipes 11 and the transmission rod 441.

[0048] The hollow screw 442 and the fixing nut 443 of the transmission assembly 44 are also located in the locking base 61, and a screw 64 is provided in the locking base 61, and the fixing nut 443 is fixed to the locking base 61 by the screw 64. The adjustment block 62 is located below the fixing nut 443, and the adjustment block 62 is provided with a through hole 621 that penetrates axially. The hollow screw 442 passes through the through hole 621 of the adjustment block 62 from bottom to top, and its upper section 522 is exposed in the through hole 621 and is screwed with the fixing nut 443. The diameter of the lower section 524 of the hollow screw 442 is larger than the diameter of the through hole 621, so that the lower section 524 thereof abuts against the bottom wall of the locking base 61. When the transmission rod 441 is rotated, the hollow screw 442 moves axially, and the lower section 524 of the hollow screw 442 drives the adjustment block 62 to move together.

[0049] like Figure 4 and Figure 6 As shown, the left and right ends of the adjustment block 62 are each provided with a first abutting surface 6221. The first abutting surface 6221 is an inclined surface, and the two first abutting surfaces 6221 are close to each other in the upward direction and relatively far away from each other in the downward direction, so that the adjustment block 62 has a roughly trapezoidal body shape. There are also two locking blocks 63, which are respectively arranged between the adjustment block 62 and the corresponding first row of tubes 11. The left and right sides of the locking block 63 are respectively provided with a curved surface 632 and a second abutting surface 631, wherein the curved surface 632 is used to fit with the outer wall of the corresponding first row of tubes 11, and the second abutting surface 631 is used to cooperate with the first abutting surface 6221. When the adjusting block 62 moves upward along the axial direction, 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 tubes 11, and the first row of tubes 11 is pressed against the hole wall of the first channel 611, thereby locking the first row of tubes 11. At this time, the first row of tubes 11 is locked relative to the second section 20. When the adjusting block 62 moves downward along the axial direction, the first abutting surface 6221 of the adjusting block 62 is separated 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 tubes 11. At this time, the first row of tubes 11 can move axially relative to the second section 20, and the user can adjust it to a desired position.

[0050] In this embodiment, when the operating portion 43 is rotated upward, the transmission rod 441 rotates and drives the hollow screw 442 and the adjustment block 62 to move axially upward, so that the locking block 63 approaches and abuts against the first row of tubes 11. Conversely, when the operating portion 43 is rotated downward, the locking block 63 moves away from the first row of tubes 11 and releases the abutment against the first row of tubes 11.

[0051] Reference again Figure 1, 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 tubes 21. The two second rows of tubes 21 have the same length, are parallel to each other and are arranged in a lateral interval. The top ends of the two second rows of tubes 21 pass through the second base 13 respectively and are fixedly connected to the locking base 61. The bottom ends of the two second rows of tubes 21 are fixedly connected to the third base 22 respectively, so that the two second rows of tubes 21 are fixed in the lateral direction. And refer to Figure 6 , the locking base 61 is provided with a third hole 613 that penetrates axially. There are two third holes 613, which are respectively arranged between the first hole 611 and the corresponding second hole 612, and are used to fix the second row of tubes 21. The second base 13 is provided with a fourth hole 131 that penetrates axially. There are also two fourth holes 131, which are axially aligned and connected with the corresponding third holes 613. The top ends of the two second rows of tubes 21 slide through the corresponding fourth holes 131, and are then respectively fixed in the two third holes 613 of the locking base 61, so that the locking base 61 can be moved axially, thereby driving the second row of tubes 21 to move axially on the first section 10, and realizing the expansion and contraction of the first section 10 and the second section 20. In this embodiment, the first row of tubes 11 and the second row of tubes 21 are arranged at intervals in the transverse direction, which facilitates the expansion and contraction of the first section 10 and the second section 20. In other embodiments, the first row of tubes 11 and the second row of tubes 21 can also be mutually sleeved.

[0052] The transmission member 70 is connected to the adjustment block 62, and is used to transmit the axial action of the adjustment block 62 to the third section 30. In this embodiment, the second row of tubes 21 is a hollow rod, and the transmission member 70 axially passes through the inner wall of the second row of tubes 21. Specifically, the transmission member 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 passes through the corresponding inner wall of the second row of tubes 21, the through hole 624 and the inner wall of another second row of tubes 21 in sequence, and is connected to the third base 22 again. The cable structure is slender and easy to store, and it passes through the adjustment block as a whole and is accommodated in the inner walls of the two second rows of tubes, so that the overall structure is simple and the transmission efficiency is high. In other embodiments, the transmission member 70 can also use other structures to transmit the force, such as steel bars, steel wire ropes or connecting rods.

[0053] The second locking assembly 80 is disposed in the third base 22 and is used to lock or release the third section 30. Fig.10 and Fig.11As 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.

[0054] 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.

[0055] 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 441. The third row of tubes 31 is slidably connected to the second section 20 through the third base 22. Fig.10As shown, the third base 22 is provided with a fifth hole 221 which runs axially through, for the third row of tubes 31 to slide through. The fifth hole 221 is located between the two second rows of tubes 21, and the sleeve section 811 of the locking ring 81 is arranged in the fifth hole 221 and sleeved on the outer periphery of the third row of tubes 31. When the locking ring 81 releases the clamping of the third row of tubes 31, the third row of tubes 31 can move axially to between the two second rows of tubes 21, thereby realizing the overlap of the third section 30 with the second section 20. When the third row of tubes 31 moves axially to between the second rows of tubes 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 overlapped, thereby realizing the contraction of the entire leg 100. At this time, the transmission rod 441 moves to the inner wall of the third row of tubes 31. Optionally, a support seat 32 is further provided at the bottom end of the third section 30 , and foot spikes may be provided at the bottom of the support seat 32 to strengthen the fixing effect with the ground.

[0056] Preferably, the leg 100 of this embodiment further includes a central axis 23 disposed in the second section 20. The central axis 23 is a hollow rod extending axially. The second base 12 is provided with a sixth hole 132 axially penetrating therethrough, and the sixth hole 132 is axially aligned with and connected to the first hole 611 of the locking base 61. The upper end of the central axis 23 is fixed in the sixth hole 132, and the lower end is fixed in the fifth hole 221. When the third section 30 and the second section 20 are contracted (overlapped), the third row of tubes 31 can move axially to the inner wall of the central axis 23. The provision of the central axis 23 further strengthens the stability of the support of the second section 20.

[0057] In this embodiment, the first locking assembly 60 and the second locking assembly 80 are used together to achieve one-step locking or releasing of the leg 100. However, since the pressures on the first, second and third rows of pipes 31 are different, the degree of wear of each row of pipes is also different. After long-term use, it may be difficult to lock the upper and lower rows of pipes synchronously. In order to ensure a better adjustment effect, the adjustment block 62 of this embodiment is set as follows Figure 8 and Fig. 9 The structure shown.

[0058] The adjusting block 62 includes a rising slider 622, an ejecting slider 625 and a supporting slider 623 which are sequentially arranged along the axial direction. The supporting slider 623 is block-shaped and is provided with a protruding supporting portion 6232, and a threaded hole 6231 is provided on the supporting portion 6232. The ejecting slider 625 is provided with an ejecting portion 6252 extending from the threaded hole 6231, and the ejecting portion 6252 extends out of the locking base 61 to facilitate operation thereof. The extending direction of the ejecting portion 6252 is perpendicular to both the lateral direction and the axial direction. The ejecting slider 625 has an inclined fifth abutting surface 6251, and the fifth abutting 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 ejecting slider 625, and the aforementioned first abutting surfaces 6221 are respectively provided on the left and right sides of the top end thereof facing away from the ejecting slider 625. The rising slider 622 and the supporting slider 623 define an axial through hole 624 and a through hole 621 together. There are two axial through holes 624 arranged at intervals. The top surface of the rising slider 622 is provided with a groove 6223 for accommodating the cable. The groove 6223 is arc-shaped, and the 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 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 part 6252 is made to move along its own extension direction, the ejection slider 625 moves on the supporting slider 623, and through its fifth abutment surface 6251 and the cavity wall of the accommodating cavity 6222 of the rising slider 622, the rising slider 622 is driven 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. In this embodiment, it is configured that: when the adjustment screw is rotated clockwise, the ejection slider 625 pushes the ascending slider upward to make it move upward, thereby driving the locking block 63 and the locking ring 81 to respectively lock the first row of tubes 10 and the third row of tubes 30. Conversely, when the adjustment screw is rotated counterclockwise, the locking block 63 releases the contact with the first row of tubes 11, and the locking ring 81 loosens the third row of tubes 30.

[0059] Further preferably, the locking member 82 may further include a cable adjuster 84 for adjusting the tightness of the cable. Fig.10As shown, a seventh hole 222 and an eighth hole 223 are respectively provided on both sides of the fifth hole 221 of the third base 22, which are used to place the locking member 82 and the cable adjuster 84 respectively. The cable adjuster 84 is provided with an adjustment knob 841 exposed from 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, thereby adjusting the tightness of the locking ring 81. This arrangement enables the third section 30 to be adjusted separately, so as to further compensate for the lack of adjustment accuracy of the second locking assembly 80.

[0060] The above description is only a preferred specific implementation manner of the present invention, and the protection scope of the present invention is not limited to the embodiments listed above. Any simple change or equivalent replacement of the technical solution that can be obviously obtained by any technician familiar with the technical field within the technical scope disclosed in the present invention falls within the protection scope of the present invention.

Claims

1. A 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 able to move axially relative to other sections to extend or shorten the tripod; An operating component, disposed at the first section; 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 operating assembly; A transmission member connected to the first locking assembly and slidably disposed in the inner cavity of the second section; A second locking assembly is disposed at the third section and connected to the transmission member; When the operating component is operated, the first locking component is driven to move axially, 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 transmission member together with the second locking component 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.

2. The tripod according to claim 1, characterized in that: The operating assembly includes an operating part, a transmission rod extending axially, 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, wherein the operating part is rotatably connected to the transmission rod for driving 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.

3. The tripod according to claim 2, characterized in that: The hollow screw rod and the transmission rod are in a shape-matched sleeve connection, and when the transmission rod rotates, the hollow screw rod also rotates accordingly.

4. The tripod according to claim 3, characterized in that: 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 transmission member, 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 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, and the adjusting block drives the locking block to approach or move away from the first section, and at the same time, the adjusting block generates an axial force on the transmission member.

5. The tripod according to claim 4, 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 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 acted on, the ejection slider drives the rising slider to move axially.

6. 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 rows of tubes can move axially between the transmission rod and the corresponding first rows of tubes, and the third section includes a third row of tubes, and the third row of tubes can move to be sleeved on the outer periphery of the transmission rod.

7. The tripod according to claim 6, characterized in that: The second section further comprises a hollow and axially extending central shaft, and the third row of tubes can be moved to the inner wall of the central shaft.

8. The tripod according to claim 7, characterized in that: The transmission member is a cable.

9. The tripod according to claim 8, characterized in that: The adjustment block is provided with a through hole extending axially therethrough. One end of the cable is connected to the second locking assembly, 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.

10. The tripod according to claim 8, characterized in that: The second locking assembly includes a locking ring and a locking piece, the locking piece is connected to one end of the cable, 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, and the locking piece is provided with a locking cavity, the two free sections are accommodated in the locking cavity, when the cable generates an axial force on the locking piece, 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.

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