Four-section single supporting pipe one-key locking type supporting leg for tripod

Abstract

The four-section single supporting pipe one-key locking type supporting leg for the tripod comprises an outer pipe, a fork frame is fixedly arranged at the top of the outer pipe, and a pulling handle assembly is arranged on the fork frame; a first inner pipe is arranged in the outer pipe in a sliding mode, a second inner pipe is arranged in the first inner pipe in a sliding mode, and a third inner pipe is arranged in the second inner pipe in a sliding mode; ground feet are fixedly arranged at the bottom of the third inner pipe; a first transmission assembly is arranged between the outer pipe and the first inner pipe, a second transmission assembly is arranged between the first inner pipe and the second inner pipe, and a third transmission assembly is arranged between the second inner pipe and the third inner pipe. A first locking assembly is arranged between the bottom end of the outer pipe and the outer wall of the first inner pipe, a second locking assembly is arranged between the bottom end of the first inner pipe and the outer wall of the second inner pipe, and a third locking assembly is arranged between the bottom end of the second inner pipe and the outer wall of the third inner pipe. The one-key locking and unlocking functions of the supporting leg are achieved by pulling the pulling handle assembly and linkage control of the steel wire ropes among the four sections of independent supporting pipes.

Description

Technical Field

[0001] The invention relates to the technical field of tripods, in particular to a one-key-locking supporting leg with four independent supporting tubes for a tripod. Background Art

[0002] The tripod has become one of the indispensable and important equipment in the field of camera photography. A locking lever is set between each two adjacent tubes on the legs of the traditional tripod. When using it, you need to manually turn the locking lever layer by layer to extend and lock the legs of the tripod, which is troublesome, time-consuming and labor-intensive. In addition, there are too many connection points that need to be manually tightened and loosened, which is not easy to adjust. Summary of the invention

[0003] In view of the above-mentioned defects or deficiencies in the prior art, it is desirable to provide a tripod with four-section independent support tubes and one-touch locking legs.

[0004] The present invention provides a four-section single-support-tube one-key-locking leg for a tripod, comprising an outer tube, a fork frame fixedly arranged on the top of the outer tube, a lever assembly for locking and unlocking the leg arranged on the fork frame; an inner tube 1 is slidably arranged inside the outer tube, an inner tube 2 is slidably arranged inside the inner tube 1, and an inner tube 3 is slidably arranged inside the inner tube 2; a foot is fixedly arranged at the bottom of the inner tube 3;

[0005] A first transmission assembly is provided between the outer tube and the inner tube 1, a second transmission assembly is provided between the inner tube 1 and the inner tube 2, and a third transmission assembly is provided between the inner tube 2 and the inner tube 3; a first locking assembly is provided between the bottom end of the outer tube and the outer wall of the inner tube 1, a second locking assembly is provided between the bottom end of the inner tube 1 and the outer wall of the inner tube 2, and a third locking assembly is provided between the bottom end of the inner tube 2 and the outer wall of the inner tube 3;

[0006] By pulling the handle assembly, linkage control of the wire ropes among the first transmission assembly, the second transmission assembly, the third transmission assembly, the first locking assembly, the second locking assembly and the third locking assembly is achieved, thereby realizing the one-touch locking and unlocking function of the legs.

[0007] Preferably, the handle assembly includes handle shafts symmetrically arranged on both sides of the fork frame, the two handle shafts are arranged to penetrate the wall of the fork frame, and the handle shafts are rotatably connected to the wall of the fork frame; a U-shaped handle is arranged on the outside of the fork frame, and the two sides of the U-shaped handle are respectively fixedly connected to one end of the two handle shafts located outside the fork frame; a connecting rod is fixedly arranged at one end of the two handle shafts located inside the fork frame, and a wire rope hanging ring is hingedly arranged at one end of the two connecting rods away from the handle shaft through the connecting rod shaft.

[0008] Preferably, the first transmission assembly includes a first mounting assembly, a first pulley assembly and a first steel wire rope; wherein,

[0009] The first mounting assembly comprises two first mounting seats symmetrically fixedly arranged inside a top end of the inner tube, the top surfaces of the two first mounting seats are fixedly provided with first sliding seats, and the first sliding seats are slidably connected with the inner wall of the outer tube; the inner side surfaces of the first mounting seats and the first sliding seats are provided with T-shaped slide grooves, and the T-shaped slide grooves include a first slide groove and a second slide groove which are perpendicularly arranged to each other; the first slide groove is vertically penetrated on the inner side surfaces of the first mounting seats and the first sliding seats;

[0010] The first pulley assembly comprises a first fixed pulley, a first pulley seat and a first movable pulley; wherein,

[0011] The first fixed pulley is rotatably disposed between the two first sliding seats and is located on a side of the first sliding groove away from the second sliding groove;

[0012] The first pulley seat is arranged between the two T-shaped slide grooves, and includes two symmetrically arranged first strip sliders, and a first U-shaped slider is fixedly arranged on one side of the two first strip sliders close to the second slide groove; the two first strip sliders are arranged to slide up and down inside the corresponding two first slide grooves, and the first U-shaped slider is arranged to slide up and down inside the second slide groove;

[0013] The first movable pulley is rotatably disposed inside the first pulley seat;

[0014] One end of the first steel wire rope is fixedly connected to the steel wire rope hanging ring, and the other end is sequentially wound around the circumferential outer sides of the first movable pulley and the first fixed pulley and then connected to the first locking assembly.

[0015] Preferably, the first locking assembly includes a first connecting sleeve fixedly arranged on the circumferential outer side of the bottom of the outer tube, the bottom end of the first connecting sleeve is located below the outer tube and is fixedly provided with a first annular clamping platform, and the inner tube one is freely passing through the inner ring of the first annular clamping platform; a first locking core sleeve is fixedly arranged on the bottom surface of the first annular clamping platform, and a first locking core seat is slidably arranged between the interior of the first locking core sleeve and the outer wall of the inner tube one; one end of the first steel wire rope away from the steel wire rope hanging ring is freely passed through the fixed connection between the first annular clamping platform and the first locking core seat; a first mounting groove is arranged on the top surface of the first locking core seat, and a first spring is arranged inside the first mounting groove; one end of the first spring is fixedly arranged at the bottom of the first mounting groove, and the other end extends to the outside of the first mounting groove; in a locked state, the top end of the first spring is arranged to abut against the bottom surface of the first annular clamping platform.

[0016] Preferably, the second transmission assembly includes a second mounting assembly, a second pulley assembly and a second steel wire rope; wherein,

[0017] The second mounting assembly comprises two second mounting seats symmetrically fixedly arranged inside the top end of the second inner tube, the top surfaces of the two second mounting seats are fixedly provided with second sliding seats, and the second sliding seats are slidably connected to the inner wall of the first inner tube; the inner side surfaces of the second mounting seat and the second sliding seat are provided with L-shaped sliding grooves, and the L-shaped sliding grooves include a third sliding groove and a fourth sliding groove arranged perpendicularly to each other; the third sliding groove is arranged to penetrate the inner side surfaces of the second mounting seat and the second sliding seat from top to bottom;

[0018] The second pulley assembly includes a second fixed pulley, a second pulley seat and a second movable pulley; wherein,

[0019] The second fixed pulley is rotatably disposed between the two second sliding seats and is located on a side of the third sliding groove close to the fourth sliding groove;

[0020] The second pulley seat is arranged between the two L-shaped slide grooves, and includes two symmetrically arranged second strip sliders, and a second U-shaped slider is fixedly arranged on one side of the two second strip sliders close to the fourth slide groove; the two second strip sliders are arranged to slide up and down inside the corresponding two third slide grooves, and the second U-shaped slider is arranged to slide up and down inside the fourth slide groove;

[0021] The second movable pulley is rotatably disposed inside the second pulley seat;

[0022] One end of the second steel wire rope is fixedly connected to the first U-shaped slider, and the other end is sequentially wound around the circumferential outer sides of the second movable pulley and the second fixed pulley and then connected to the second locking assembly.

[0023] Preferably, the second locking assembly includes a second connecting sleeve fixedly arranged on the circumferential outer side of the bottom of the inner tube one, the bottom end of the second connecting sleeve is located below the inner tube one and is fixedly provided with a second annular clamping platform, and the inner tube two can freely pass through the inner ring of the second annular clamping platform; a second locking core sleeve is fixedly arranged on the bottom surface of the second annular clamping platform, and a second locking core seat is slidably arranged between the interior of the second locking core sleeve and the outer wall of the inner tube two; one end of the second steel wire rope away from the first U-shaped slider can freely pass through the fixed connection between the second annular clamping platform and the second locking core seat; a second mounting groove is arranged on the top surface of the second locking core seat, and a second spring is arranged inside the second mounting groove; one end of the second spring is fixedly arranged on the bottom of the second mounting groove, and the other end extends to the outside of the second mounting groove; in the locked state, the top end of the second spring is arranged to abut against the bottom surface of the second annular clamping platform.

[0024] Preferably, the third transmission assembly includes a third steel wire rope, one end of which is fixedly connected to the second locking core seat, and the other end of which is connected to the third locking assembly.

[0025] Preferably, a plug is fixedly provided inside the top end of the inner tube three, a third sliding seat is fixedly provided on the top surface of the plug, and the third sliding seat is slidably connected to the inner wall of the inner tube two.

[0026] Preferably, the third locking assembly includes a third connecting sleeve fixedly arranged on the circumferential outer side of the bottom of the inner tube two, the bottom end of the third connecting sleeve is located below the inner tube two and is fixedly provided with a third annular clamping platform, and the inner tube three is freely passed through the inner ring of the third annular clamping platform; a third locking core sleeve is fixedly arranged on the bottom surface of the third annular clamping platform, and a third locking core seat is slidably arranged between the interior of the third locking core sleeve and the outer wall of the inner tube three; one end of the third steel wire rope away from the second U-shaped slider freely passes through the third sliding seat and the fixed connection between the third annular clamping platform and the third locking core seat in turn; a third mounting groove is arranged on the top surface of the third locking core seat, and a third spring is arranged inside the third mounting groove; one end of the third spring is fixedly arranged at the bottom of the groove of the third mounting groove, and the other end extends to the outside of the third mounting groove; in a locked state, the top end of the third spring is arranged to abut against the bottom surface of the third annular clamping platform.

[0027] Preferably, the walls where the first locking core sleeve contacts the first locking core seat, the second locking core sleeve contacts the second locking core seat, and the third locking core sleeve contacts the third locking core seat are all configured as wedge-shaped inclined surfaces; and the longitudinal cross-sections of the first locking core seat, the second locking core seat, and the third locking core seat are configured as right-angled trapezoids.

[0028] Compared with the prior art, the beneficial effects of the present invention are:

[0029] The tripod of the present invention uses four-section independent support tube one-touch locking legs, and controls the first transmission assembly, the second transmission assembly, the third transmission assembly, the first locking assembly, the second locking assembly and the third locking assembly through the provided lever assembly wire rope linkage, so as to realize the one-touch unlocking and locking function of the outer tube, the inner tube 1, the inner tube 2 and the inner tube 3, and the operation is simple, avoiding and simplifying the operation process of unlocking and locking each section of the tube step by step in the traditional method, thereby improving the work efficiency.

[0030] It should be understood that the contents described in the summary of the invention are not intended to limit the key or important features of the embodiments of the present invention, nor are they intended to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Other features, objects and advantages of the present invention will become more apparent from the detailed description of non-limiting embodiments made with reference to the following drawings:

[0032] Figure 1 A schematic structural diagram of one side of a four-section single-tube one-key lock type leg for a tripod provided by an embodiment of the present invention;

[0033] Figure 2 This is a schematic diagram of the structure of the other side of the four-section single-tube one-touch locking legs for the tripod;

[0034] Figure 3 It is a structural schematic diagram of the outrigger section;

[0035] Figure 4 It is a structural schematic diagram of the handle assembly;

[0036] Figure 5 It is a structural schematic diagram of a cross section of one side of the handle assembly;

[0037] Figure 6 It is a structural schematic diagram of the cross section of the other side of the handle assembly;

[0038] Figure 7 is a schematic structural diagram of a cross section of the first transmission assembly inside the outer tube;

[0039] Figure 8 is a structural schematic diagram of a first transmission assembly;

[0040] Fig. 9 is an exploded view of the first transmission assembly;

[0041] Fig.10 It is a schematic diagram of the structure after the first mounting seat and the first sliding seat are assembled;

[0042] Fig.11 is a schematic structural diagram of a cross section of the second transmission assembly inside the inner tube 1;

[0043] Fig.12 is a structural schematic diagram of a second transmission assembly;

[0044] Fig.13 is an exploded view of the second transmission assembly;

[0045] Fig.14 It is a schematic diagram of the structure after the second mounting seat and the second sliding seat are assembled;

[0046] Fig.15 It is a schematic diagram of the structure after the plug and the third sliding seat are assembled;

[0047] Fig.16 It is a schematic diagram of the structure after the first locking assembly is assembled;

[0048] Fig.17 is an exploded view of the first locking assembly;

[0049] Fig.18 It is a schematic diagram of the structure after the second locking assembly is assembled;

[0050] Fig.19 It is a schematic diagram of the structure after the third locking assembly is assembled;

[0051] Fig. 20 It is a structural schematic diagram of a cross section of the first locking assembly (or the second locking assembly or the third locking assembly);

[0052] Numbers in the figure: 1, fork frame; 2, outer tube; 3, inner tube 1; 4, inner tube 2; 5, inner tube 3; 6, foot;

[0053] 7. handle assembly; 71. handle shaft; 72. handle; 73. connecting rod; 74. connecting rod shaft; 75. wire rope hanging ring;

[0054] 8. First transmission assembly; 81. First mounting seat; 82. First sliding seat; 83. T-shaped slide groove; 831. First slide groove; 832. Second slide groove; 84. First fixed pulley; 85. First pulley seat; 851. First strip slider; 852. First U-shaped slider; 86. First movable pulley; 87. First wire rope;

[0055] 9. Second transmission assembly; 91. Second mounting seat; 92. Second sliding seat; 93. L-shaped slide groove; 931. Third slide groove; 932. Fourth slide groove; 94. Second fixed pulley; 95. Second pulley seat; 951. Second strip slider; 952. Second U-shaped slider; 96. Second movable pulley; 97. Second wire rope;

[0056] 10. third transmission assembly; 101. third steel wire rope;

[0057] 11. first locking assembly; 111. first connecting sleeve; 112. first annular clamping table; 113. first locking core sleeve; 114. first locking core seat; 115. first mounting groove; 116. first spring;

[0058] 12. second locking assembly; 121. second connecting sleeve; 122. second annular clamping table; 123. second locking core sleeve; 124. second locking core seat; 125. second mounting groove; 126. second spring;

[0059] 13. third locking assembly; 131. third connecting sleeve; 132. third annular clamping table; 133. third locking core sleeve; 134. third locking core seat; 135. third mounting groove; 136. third spring;

[0060] 14. Plug; 15. Third sliding seat. DETAILED DESCRIPTION

[0061] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the relevant invention, rather than to limit the invention. It should also be noted that, for ease of description, only the parts related to the invention are shown in the accompanying drawings.

[0062] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0063] Please refer to Figures 1 to 20 The embodiment of the present invention provides a four-section single-support tube one-touch lock type leg for a tripod, comprising an outer tube 2, a fork frame 1 is fixedly provided on the top of the outer tube, and a lever assembly 7 for locking and unlocking the leg is provided on the fork frame 1;

[0064] Among them, the supporting leg includes four independent tubes, namely, an outer tube 2, an inner tube 1 3, an inner tube 2 4 and an inner tube 3 5. The inner tube 1 3 is slidingly arranged inside the outer tube 2, the inner tube 1 3 is slidingly arranged inside the inner tube 2 4, and the inner tube 3 5 is slidingly arranged inside the inner tube 2 4. A foot 6 is fixedly arranged at the bottom of the inner tube 3 5. The setting of the foot 6 can improve the stability of the supporting leg when in contact with the ground, as well as protect the bottom end of the inner tube 3 5 and extend its service life.

[0065] A first transmission assembly 8 is provided between the outer tube 2 and the inner tube 1 3, a second transmission assembly 9 is provided between the inner tube 1 3 and the inner tube 2 4, and a third transmission assembly 10 is provided between the inner tube 2 4 and the inner tube 3 5; a first locking assembly 11 is provided between the bottom end of the outer tube 2 and the outer wall of the inner tube 1 3, a second locking assembly 12 is provided between the bottom end of the inner tube 1 3 and the outer wall of the inner tube 2 4, and a third locking assembly 13 is provided between the bottom end of the inner tube 2 4 and the outer wall of the inner tube 3 5;

[0066] By pulling the handle assembly 7, the wire rope linkage control between the first transmission assembly 8, the second transmission assembly 9, the third transmission assembly 10, the first locking assembly 11, the second locking assembly 12 and the third locking assembly 13 is realized, thereby realizing the one-key locking and unlocking function of the outrigger, which is simple to operate and highly efficient.

[0067] In a preferred embodiment, the handle assembly 7 includes handle shafts 71 symmetrically arranged on both sides of the fork frame 1, the two handle shafts 71 penetrate two opposite walls of the fork frame 1, and the handle shafts 71 are rotatably connected to the wall of the fork frame 1; a U-shaped handle 72 is arranged on the outside of the fork frame 1, and the two sides of the U-shaped handle 72 are respectively fixedly connected to one end of the two handle shafts 71 located outside the fork frame 1; a connecting rod 73 is fixedly arranged at one end of the two handle shafts 71 located inside the fork frame 1, and a wire rope hanging ring 75 is hingedly arranged at one end of the two handle shafts 71 away from the handle shaft 71 through a connecting rod shaft 74;

[0068] By pulling the lever 71, the lever shaft 71 is driven to rotate, and then the connecting rod 73 inside the fork frame 1 rotates accordingly and drives the wire rope hanging ring 75 to move up and down.

[0069] In a preferred embodiment, the first transmission assembly 8 includes a first mounting assembly, a first pulley assembly and a first steel wire rope 87; wherein,

[0070] The first mounting assembly includes two first mounting seats 81 symmetrically fixedly disposed inside the top end of the inner tube 3, the top surfaces of the two first mounting seats 81 are both fixedly disposed with first sliding seats 82, and the two first sliding seats 82 are also symmetrically disposed;

[0071] The first sliding seat 82 is slidably connected to the inner wall of the outer tube 2. In a specific embodiment, a vertical through-sliding groove is provided on the outer side of the first sliding seat 82, and a sliding bar is provided on the inner wall of the outer tube 2. The sliding bar is embedded in the corresponding through-sliding groove to improve the stability of the sliding process when the inner tube 1 slides up and down inside the outer tube. The second sliding seat 92 and the third sliding seat 15 are similarly described below.

[0072] A T-shaped slide groove 83 is provided on the inner side surface of the first mounting seat 81 and the first sliding seat 82. The T-shaped slide groove 83 includes a first slide groove 831 and a second slide groove 832 which are perpendicular to each other. The first slide groove 831 is vertically penetrated on the inner side surface of the first mounting seat 81 and the first sliding seat 82.

[0073] The first pulley assembly includes a first fixed pulley 84, a first pulley seat 85 and a first movable pulley 86; wherein,

[0074] The first fixed pulley 84 is rotatably disposed between the two first sliding seats 82 and is located on the side of the first sliding groove 831 away from the second sliding groove 832, and moves along with the up-and-down movement of the inner tube 3 and the outer tube 2;

[0075] The first pulley seat 85 is arranged between the two T-shaped slide grooves 83, and includes two symmetrically arranged first strip sliders 851, and a first U-shaped slider 852 is fixedly arranged on one side of the two first strip sliders 851 close to the second slide groove 832; the two first strip sliders 851 are arranged to slide up and down inside the corresponding two first slide grooves 831, and the first U-shaped slider 852 is arranged to slide up and down inside the second slide groove 832;

[0076] Among them, since the second sliding groove 832 is not a structure that penetrates from top to bottom, the height of the second sliding groove 832 determines the stroke size of the first pulley seat 85 sliding up and down.

[0077] The first movable pulley 86 is rotatably disposed inside the first pulley seat 85 , and slides up and down following the first pulley seat 85 .

[0078] In a preferred embodiment, the first locking assembly 11 includes a first connecting sleeve 111 fixedly arranged on the circumferential outer side of the bottom of the outer tube 2, the bottom end of the first connecting sleeve 111 is located below the outer tube 2 and is fixedly provided with a first annular clamping platform 112, and the inner tube 3 freely passes through the inner circle of the first annular clamping platform 112 to avoid movement interference when adjusting the height of the legs; a first locking core sleeve 113 is fixedly arranged on the bottom surface of the first annular clamping platform 112, and a first locking core seat 114 is slidably arranged between the inside of the first locking core sleeve 113 and the outer wall of the inner tube 3;

[0079] The wall surface of the first locking core seat 114 close to the inner tube 3 is set as an arc surface, which is convenient for the first locking core seat 114 to move upward inside the first locking core sleeve 113. Its arc surface can fit more closely to the outer wall surface of the inner tube 3 to lock it. The second locking core seat 114 and the third locking core seat 124 are the same below and will not be repeated.

[0080] A first steel wire rope 87, one end of which is fixedly connected to the steel wire rope hanging ring 75, and the other end of which is sequentially wound around the circumferential outer side of the first movable pulley 86 and the first fixed pulley 84, and then freely passes through the first annular clamping table 112 and the fixed connection of the first locking core seat 114, and is used to control whether the first locking core seat 114 is clamped or loosened between the first locking core sleeve 111 and the inner tube 3;

[0081] The top surface of the first locking core seat 114 is provided with a first mounting groove 115, and the interior of the first mounting groove 115 is provided with a first spring 116, one end of the first spring 116 is fixedly arranged at the bottom of the first mounting groove 115, and the other end extends to the outside of the first mounting groove 115; in the locked state, the top end of the first spring 116 is arranged to abut against the bottom surface of the first annular clamping table 112, so that when the lever 72 is pulled upward, the first steel wire rope 87 unloads the force, and under the action of the first spring 116, the first locking core seat 114 moves downward between the first locking core sleeve 113 and the outer wall of the inner tube 3, thereby releasing the component force perpendicular to the axis of the inner tube 3 generated by the first locking core seat 114 on the inner tube 3, thereby unlocking the inner tube 3; the working principles of the second spring 126 and the third spring 136 hereinafter are the same and will not be repeated.

[0082] In a preferred embodiment, the second transmission assembly 9 includes a second mounting assembly, a second pulley assembly and a second steel wire rope 97; wherein,

[0083] The second mounting assembly includes two second mounting seats 91 symmetrically fixedly arranged inside the top end of the inner tube 2 4, the top surfaces of the two second mounting seats 91 are fixedly provided with second sliding seats 92, the two second sliding seats 92 are also symmetrically arranged, the second sliding seats 92 are slidably connected to the inner wall of the inner tube 1 3, and are used to improve the stability of the inner tube 2 4 when sliding up and down inside the inner tube 1 3; the inner side surfaces of the second mounting seats 91 and the second sliding seats 92 are provided with L-shaped slide grooves 93, and the L-shaped slide grooves 93 include a third slide groove 931 and a fourth slide groove 932 arranged perpendicularly to each other; the third slide groove 931 is arranged to penetrate the inner side surfaces of the second mounting seats 91 and the second sliding seats 93 from top to bottom;

[0084] The second pulley assembly includes a second fixed pulley 94, a second pulley seat 95 and a second movable pulley 96; wherein,

[0085] The second fixed pulley 94 is rotatably disposed between the two second sliding seats 92 and is located on the side of the third slide groove 931 close to the fourth slide groove 932, and moves along with the up-and-down movement of the inner tube 3 5 inside the inner tube 2 4;

[0086] The second pulley seat 95 is arranged between the two L-shaped slide grooves 93, and includes two symmetrically arranged second strip sliders 951, and a second U-shaped slider 952 is fixedly arranged on one side of the two second strip sliders 951 close to the fourth slide groove 932; the two second strip sliders 951 are arranged to slide up and down inside the corresponding two third slide grooves 931, and the second U-shaped slider 952 is arranged to slide up and down inside the fourth slide groove 932;

[0087] The second movable pulley 96 is rotatably disposed inside the second pulley seat 95 and moves along with the up and down movement of the second pulley seat 95;

[0088] In a preferred embodiment, the second locking assembly 12 includes a second connecting sleeve 121 fixedly arranged on the circumferential outer side of the bottom of the inner tube 3, the bottom end of the second connecting sleeve 121 is located below the inner tube 3 and is fixedly provided with a second annular clamping platform 122, and the inner tube 4 freely passes through the inner circle of the second annular clamping platform 122 to avoid motion interference when the inner tube 4 slides up and down on the inner tube 3; a second locking core sleeve 123 is fixedly arranged on the bottom surface of the second annular clamping platform 122, and a second locking core seat 124 is slidably arranged between the inside of the second locking core sleeve 123 and the outer wall of the inner tube 4;

[0089] A second steel wire rope 97, one end of which is fixedly connected to the first U-shaped slider 852, and the other end of which is sequentially wound around the circumferential outer side of the second movable pulley 96 and the second fixed pulley 94, and then freely passes through the second annular clamping table 122 and is fixedly connected to the second locking core seat 124;

[0090] A second mounting groove 125 is provided on the top surface of the second locking core seat 124, and a second spring 126 is provided inside the second mounting groove 125. One end of the second spring 126 is fixedly arranged at the bottom of the second mounting groove 125, and the other end extends to the outside of the second mounting groove 125 and is abutted against the bottom surface of the second annular clamping table 122.

[0091] In a preferred embodiment, a plug 14 is fixedly provided inside the top end of the inner tube three 5, and a third sliding seat 15 is fixedly provided on the top surface of the plug 14. The third sliding seat 15 is slidingly connected to the inner wall of the inner tube two 4. The setting of the third sliding seat 15 can improve the stability of the inner tube three 5 when it slides inside the inner tube two 4.

[0092] In a preferred embodiment, the third locking assembly 13 includes a third connecting sleeve 131 fixedly arranged on the circumferential outer side of the bottom of the inner tube 2 4, the bottom end of the third connecting sleeve 131 is located below the inner tube 2 4 and is fixedly provided with a third annular clamping platform 132, and the inner tube 3 5 freely passes through the inner circle of the third annular clamping platform 132; a third locking core sleeve 133 is fixedly arranged on the bottom surface of the third annular clamping platform 132, and a third locking core seat 134 is slidably arranged between the inside of the third locking core sleeve 133 and the outer wall of the inner tube 3 5;

[0093] In a preferred embodiment, the third transmission assembly 10 includes a third steel wire rope 101, one end of the third steel wire rope 101 is fixedly connected to the second locking core seat 124, and the other end freely passes through the third sliding seat 15 and the third annular clamping table 132 in sequence and is fixedly connected to the third locking core seat 134;

[0094] A third mounting groove 135 is provided on the top surface of the third locking core seat 134, and a third spring 136 is provided inside the third mounting groove 135. One end of the third spring 136 is fixedly arranged at the bottom of the third mounting groove 135, and the other end extends to the outside of the third mounting groove 135 and is arranged to abut against the bottom surface of the third annular clamping table 132.

[0095] In a preferred embodiment, the contact walls of the first locking core sleeve 113 and the first locking core seat 114, the contact walls of the second locking core sleeve 123 and the second locking core seat 124, and the contact walls of the third locking core sleeve 133 and the third locking core seat 134 are all set as wedge-shaped inclined surfaces; the longitudinal cross-sections of the first locking core seat 114, the second locking core seat 124 and the third locking core seat 134 are set as right-angled trapezoids.

[0096] Among them, by controlling the high and low position of the first locking core seat 114 inside the first locking core sleeve 113, the magnitude of the component force perpendicular to the axis of the inner tube 3 generated by the first locking core seat 114 is adjusted, and then the magnitude of the friction between the first locking core seat 114 and the outer wall of the inner tube 3 is adjusted; during the upward movement of the first locking core seat 124 inside the first locking core sleeve 113, the friction between the first locking core seat 114 and the outer wall of the inner tube 3 is increased, so as to achieve the locking of the inner tube 3 relative to the outer tube; the second locking core seat 124 and the second locking core sleeve 123, and the third locking core seat 134 and the third locking core sleeve 133 are the same.

[0097] Working principle of the present invention:

[0098] 1. Locking process:

[0099] Pulling the lever 72 downward drives the connecting rod 73 to rotate upward, thereby driving the first steel wire 87 to move upward. The first steel wire 87 moves upward and the steel wire 87 continues to pull upward, pulling the first locking core seat 114 to move upward. The first locking core seat 114 conflicts with the wedge-shaped inclined surface inside the first locking core sleeve 113, so that the first locking core seat 114 generates a component force perpendicular to the axis of the inner tube 3 on the inner tube 3, thereby causing the first locking core seat 114 to frictionally lock with the outer side surface of the inner tube 3 during the upward movement, so that the inner tube 3 is locked inside the outer tube 2; Similarly, since the first pulley seat 82 moves upward under the action of the first steel wire 87, the second steel wire 87 also moves upward, so that the second locking core seat 124 and the outer side surface of the inner tube 4 are frictionally locked, so the inner tube 4 is locked inside the inner tube 1 3; similarly, since the second pulley seat 95 also moves upward under the action of the second steel wire 97, the third steel wire 101 drives the third locking core seat 134 and the outer side surface of the inner tube 3 5 to frictionally lock, so the inner tube 3 5 is locked inside the inner tube 2 4; that is, the function of locking the four-section single tube with one key is realized by pulling the lever 72;

[0100] In the above locked state, the first spring 116 , the second spring 126 , and the third spring 136 on the first locking core seat 114 , the second locking core seat 124 , and the third locking core seat 134 are all in a compressed state.

[0101] 2. Unlocking process;

[0102] The lever 72 is pulled upward to drive the connecting rod 73 to rotate downward, so that the first steel wire 87 is in a force-releasing state. Since the first spring 116 is in a compressed state in the locked state, when the first steel wire 87 is unloaded, under the action of the first spring 116, the first locking core seat 114 slides downward and gradually separates from the outer wall of the inner tube 3, thereby unlocking the inner tube 3.

[0103] As the first locking core seat 114 slides downwards and drives the first pulley seat 85 to slide downwards inside its corresponding T-shaped slide groove 83 through the first steel wire 87, the second steel wire 97 between the first pulley seat 85 and the second locking core seat 124 is also in a force-unloading state. Under the action of the second spring 126, the second locking core seat 124 moves downwards relative to the first locking core sleeve 123 and separates from the outer wall of the inner tube 4, thereby unlocking the inner tube 4 in the same way.

[0104] As the second locking core seat 124 slides downwards and drives the second pulley seat 95 to slide downwards inside its corresponding L-shaped slide groove 93 through the second steel wire rope 97, the third steel wire rope 101 between the second pulley seat 95 and the third locking core seat 134 is also in a force-unloading state. Under the action of the third spring 136, the third locking core seat 134 moves downwards relative to the second locking core sleeve 133 and detaches from the outer wall of the inner tube 3 5, thereby unlocking the inner tube 3 5 in the same way.

[0105] Among them, when the relative positions of the four support tubes change, the connection points of each wire rope will not change.

[0106] In summary, by pulling the handle 72 upward, under the joint action of the first spring 116, the second spring 126 and the third spring 136, the one-key unlocking function of the four-section independent support tube is realized, which has a simple operation method and high efficiency.

[0107] In the description of this specification, the terms "connection", "installation", "fixation" and the like should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0108] In the description of this specification, the description of the terms "one embodiment", "some embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0109] The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A tripod with four-section independent support tubes and one-touch lock legs, characterized in that: The invention comprises an outer tube (2), a fork frame (1) is fixedly provided on the top of the outer tube (2), and a lever assembly (7) for locking and unlocking the legs is provided on the fork frame (1); an inner tube 1 (3) is slidably provided inside the outer tube (2), an inner tube 2 (4) is slidably provided inside the inner tube 1 (3), and an inner tube 3 (5) is slidably provided inside the inner tube 2 (4); and a foot (6) is fixedly provided on the bottom of the inner tube 3 (5); A first transmission assembly (8) is provided between the outer tube (2) and the inner tube one (3), a second transmission assembly (9) is provided between the inner tube one (3) and the inner tube two (4), and a third transmission assembly (10) is provided between the inner tube two (4) and the inner tube three (5); a first locking assembly (11) is provided between the bottom end of the outer tube (2) and the outer wall of the inner tube one (3), a second locking assembly (12) is provided between the bottom end of the inner tube one (3) and the outer wall of the inner tube two (4), and a third locking assembly (13) is provided between the bottom end of the inner tube two (4) and the outer wall of the inner tube three (5); By pulling the handle assembly (7), linkage control between the first transmission assembly (8), the second transmission assembly (9), the third transmission assembly (10), the first locking assembly (11), the second locking assembly (12) and the third locking assembly (13) is achieved, thereby realizing a one-touch locking and unlocking function of the supporting leg.

2. The four-section single-support-tube one-touch-locking legs for a tripod according to claim 1, characterized in that: The handle assembly (7) comprises handle shafts (71) symmetrically arranged on both sides of the fork frame (1), the two handle shafts (71) are both arranged to penetrate the wall surface of the fork frame (1), and the handle shafts (71) are rotatably connected to the wall surface of the fork frame (1); a U-shaped handle (72) is arranged on the outer side of the fork frame (1), and the two sides of the U-shaped handle (72) are respectively fixedly connected to one end of the two handle shafts (71) located outside the fork frame (1); one end of the two handle shafts (71) located inside the fork frame (1) is fixedly provided with a connecting rod (73), and the ends of the two connecting rods (73) away from the handle shafts (71) are hingedly provided with wire rope hanging rings (75) through connecting rod shafts (74).

3. The tripod four-section single-support tube one-touch lock type legs according to claim 2, characterized in that: The first transmission assembly (8) comprises a first mounting assembly, a first pulley assembly and a first steel wire rope (87); wherein: The first mounting assembly comprises two first mounting seats (81) symmetrically fixedly arranged inside the top end of the inner tube (3), the top surfaces of the two first mounting seats (81) are fixedly provided with first sliding seats (82), and the first sliding seats (82) are slidably connected to the inner wall of the outer tube (2); the inner side surfaces of the first mounting seats (81) and the first sliding seats (82) are provided with T-shaped sliding grooves (83), and the T-shaped sliding grooves (83) include a first sliding groove (831) and a second sliding groove (832) which are perpendicularly arranged to each other; the first sliding groove (831) is arranged to penetrate the inner side surfaces of the first mounting seats (81) and the first sliding seats (82) from top to bottom; The first pulley assembly comprises a first fixed pulley (84), a first pulley seat (82) and a first movable pulley (86); wherein: The first fixed pulley (84) is rotatably disposed between the two first sliding seats (82) and is located on a side of the first sliding groove (831) away from the second sliding groove (832); The first pulley seat (85) is arranged between the two T-shaped slide grooves (83), and comprises two symmetrically arranged first strip-shaped sliding blocks (851), and a first U-shaped sliding block (852) is fixedly arranged on one side of the two first strip-shaped sliding blocks (851) close to the second slide groove (832); the two first strip-shaped sliding blocks (851) are arranged to slide up and down inside the corresponding two first slide grooves (831), and the first U-shaped sliding block (852) is arranged to slide up and down inside the second slide groove (832); The first movable pulley (86) is rotatably disposed inside the first pulley seat (85); One end of the first steel wire rope (87) is fixedly connected to the steel wire rope hanging ring (75), and the other end is sequentially wound around the circumferential outer sides of the first movable pulley (86) and the first fixed pulley (84) and then connected to the first locking assembly (11).

4. The four-section single-support-tube one-touch-locking legs for a tripod according to claim 3, characterized in that: The first locking assembly (11) comprises a first connecting sleeve (111) fixedly arranged on the circumferential outer side of the bottom of the outer tube (2); the bottom end of the first connecting sleeve (111) is located below the outer tube (2) and is fixedly provided with a first annular clamping platform (112); the inner tube (3) freely passes through the inner ring of the first annular clamping platform (112); a first locking core sleeve (113) is fixedly arranged on the bottom surface of the first annular clamping platform (112); a first locking core seat (114) is slidably arranged between the interior of the first locking core sleeve (113) and the outer wall of the inner tube (3); the first steel wire rope (87 ) one end away from the wire rope hanging ring (75) freely passes through the first annular clamping table (112) and is fixedly connected with the first locking core seat (114); the top surface of the first locking core seat (114) is provided with a first mounting groove (115), and the first spring (116) is provided inside the first mounting groove (115); one end of the first spring (116) is fixedly arranged at the bottom of the first mounting groove (115), and the other end extends to the outside of the first mounting groove; in the locked state, the top end of the first spring (116) is arranged to abut against the bottom surface of the first annular clamping table (112).

5. The four-section single-support-tube one-touch-locking legs for a tripod according to claim 4, characterized in that: The second transmission assembly (9) comprises a second mounting assembly, a second pulley assembly and a second steel wire rope (97); wherein: The second mounting assembly comprises two second mounting seats (91) symmetrically fixedly arranged inside the top end of the second inner tube (4), the top surfaces of the two second mounting seats (91) are fixedly provided with second sliding seats (92), and the second sliding seats (92) are slidably connected with the inner wall of the first inner tube (3); the inner side surfaces of the second mounting seats (91) and the second sliding seats (92) are provided with L-shaped sliding grooves (93), and the L-shaped sliding grooves (93) include a third sliding groove (931) and a fourth sliding groove (932) arranged perpendicular to each other; the third sliding groove (931) is arranged to penetrate the inner side surfaces of the second mounting seats (91) and the second sliding seats (92) from top to bottom; The second pulley assembly comprises a second fixed pulley (94), a second pulley seat (95) and a second movable pulley (96); wherein: The second fixed pulley (94) is rotatably disposed between the two second sliding seats (95) and is located on a side of the third sliding groove (931) close to the fourth sliding groove (932); The second pulley seat (95) is arranged between the two L-shaped slide grooves (93), and comprises two symmetrically arranged second strip-shaped sliding blocks (951), and a second U-shaped sliding block (952) is fixedly arranged on one side of the two second strip-shaped sliding blocks (951) close to the fourth slide groove (932); the two second strip-shaped sliding blocks (951) are arranged to slide up and down inside the corresponding two third slide grooves (931), and the second U-shaped sliding block (952) is arranged to slide up and down inside the fourth slide groove (932); The second movable pulley (96) is rotatably disposed inside the second pulley seat (95); One end of the second steel wire rope (97) is fixedly connected to the first U-shaped slider (852), and the other end is sequentially wound around the circumferential outer sides of the second movable pulley (96) and the second fixed pulley (94) and then connected to the second locking assembly (12).

6. The tripod four-section single-support-tube one-touch-locking legs according to claim 5, characterized in that: The second locking assembly (12) comprises a second connecting sleeve (121) fixedly arranged on the circumferential outer side of the bottom of the inner tube one (3); the bottom end of the second connecting sleeve (121) is located below the inner tube one (3) and is fixedly provided with a second annular clamping platform (122); the inner tube two (4) freely passes through the inner circle of the second annular clamping platform (122); a second locking core sleeve (123) is fixedly arranged on the bottom surface of the second annular clamping platform (122); a second locking core seat (124) is slidably arranged between the inside of the second locking core sleeve (123) and the outer wall of the inner tube two (4); the second steel wire rope (97) is away from One end of the first U-shaped slider (852) freely passes through the second annular clamping table (122) and is fixedly connected to the second locking core seat (124); a second mounting groove (125) is provided on the top surface of the second locking core seat (124), and a second spring (126) is provided inside the second mounting groove (125); one end of the second spring (126) is fixedly arranged at the bottom of the second mounting groove (125), and the other end extends to the outside of the second mounting groove (125); in the locked state, the top end of the second spring (126) is arranged to abut against the bottom surface of the second annular clamping table (122).

7. The four-section single-support-tube one-touch-locking legs for a tripod according to claim 6, characterized in that: The third transmission assembly (10) comprises a third steel wire rope (101), one end of the third steel wire rope (101) is fixedly connected to the second locking core seat (124), and the other end is connected to the third locking assembly (13).

8. The four-section single-support-tube one-touch-locking legs for a tripod according to claim 7, characterized in that: A plug (14) is fixedly provided inside the top end of the inner tube three (5), and a third sliding seat (15) is fixedly provided on the top surface of the plug (14), and the third sliding seat (15) is slidably connected to the inner wall of the inner tube two (4).

9. The tripod four-section single-support-tube one-touch-locking legs according to claim 8, characterized in that: The third locking assembly (13) comprises a third connecting sleeve (131) fixedly arranged on the circumferential outer side of the bottom of the inner tube (4); the bottom end of the third connecting sleeve (131) is located below the inner tube (4) and is fixedly provided with a third annular clamping platform (132); the inner tube (5) freely passes through the inner ring of the third annular clamping platform (132); a third locking core sleeve (133) is fixedly arranged on the bottom surface of the third annular clamping platform (132); a third locking core seat (134) is slidably arranged between the inside of the third locking core sleeve (133) and the outer wall of the inner tube (5); the third steel wire rope (101) is away from the second U One end of the sliding block (952) freely passes through the third sliding seat (15) and the third annular clamping table (132) in sequence and is fixedly connected to the third locking core seat (134); a third mounting groove (135) is provided on the top surface of the third locking core seat (134), and a third spring (136) is provided inside the third mounting groove (135); one end of the third spring (136) is fixedly arranged at the bottom of the third mounting groove (135), and the other end extends to the outside of the third mounting groove (135); in the locked state, the top end of the third spring (136) is arranged to abut against the bottom surface of the third annular clamping table (132).

10. The tripod four-section single-support-tube one-touch-locking legs according to claim 9, characterized in that: The contact walls of the first locking core sleeve (113) and the first locking core seat (114), the contact walls of the second locking core sleeve (123) and the second locking core seat (124), and the contact walls of the third locking core sleeve (133) and the third locking core seat (134) are all arranged as wedge-shaped inclined surfaces; the longitudinal cross-sections of the first locking core seat (114), the second locking core seat (124), and the third locking core seat (134) are arranged as right-angled trapezoids.

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