Heavy duty support legs and heavy duty support stands

Abstract

This invention relates to a heavy-duty support leg and a heavy-duty support tripod incorporating the heavy-duty support leg. The heavy-duty support leg comprises a main support leg and a secondary support leg with two tubes. The secondary support leg is movably mounted on the main support leg and includes a first leg and a second leg. Locking parts are provided at both ends of the main support leg along its axial direction, respectively restricting the movement of the first and second legs along the axial direction of the main support leg. Each locking part includes a mounting base and a locking structure, which can move radially along the main support leg. The heavy-duty support leg is equipped with a pull line connecting the two locking parts, enabling the two locking structures to be linked and simultaneously switched between unlocked and locked states. The heavy-duty support leg features a double-row tube configuration, improving strength and stability, and can support heavier shooting equipment. Multiple locking parts work together to achieve one-button locking or unlocking, eliminating the need for separate locking or unlocking, making operation convenient. The secondary support leg can be completely retracted into the main support leg, facilitating storage and portability.

Description

Technical Field

[0001] This invention relates to the field of photographic accessories technology, and in particular to a heavy-duty support leg and a heavy-duty support tripod. Background Technology

[0002] Tripods, as a common photography accessory, are increasingly widely used in daily life. Tripods provide stable support for the shooting equipment mounted on them. However, traditional tripods have two problems: each leg is a single tube, resulting in poor stability and strength, a short lifespan, and inability to mount heavy shooting equipment; the legs include multiple locking mechanisms, requiring users to sequentially open or close these mechanisms to open or close the legs, making operation cumbersome and requiring multiple bending or squatting, leading to a poor user experience.

[0003] For example, CN217976909U discloses a multi-section tube connection structure and a tripod support leg. The support leg includes two or more tubes, with a connection structure between adjacent tubes. This connection structure can lock or unlock the relative movement of adjacent tubes. In this technical solution, the support leg is a single tube, resulting in poor stability and strength, short service life, and inability to mount heavy shooting equipment. Furthermore, the support leg has multiple connection structures, requiring the sequential opening or locking of these structures to open or retract the support leg, making operation cumbersome and resulting in a poor user experience. Summary of the Invention

[0004] The present invention provides a heavy-duty support leg and a heavy-duty support tripod to solve the problems of poor stability and strength of traditional tripods, and the need for users to open or lock multiple locking structures in sequence to open or close the tripod, which is cumbersome and results in a poor user experience.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0006] A heavy-duty support leg includes:

[0007] The main support leg includes two main bodies arranged side by side, and a locking part connected to the two main bodies. The number of locking parts is two, and the two locking parts are located at both ends of the axial direction of the main support leg.

[0008] The auxiliary support leg includes a first support leg and a second support leg. Both the first support leg and the second support leg include two parallel and connected auxiliary tubes. The auxiliary tube of the first support leg is axially movable within one end of the main body, and the auxiliary tube of the second support leg is axially movable within the other end of the main body.

[0009] The locking part includes a mounting base and a locking structure. The mounting base connects both main bodies, and the locking structure is movably mounted on the mounting base along the radial direction of the main support leg. The heavy-duty support leg also includes a pull line connected to the locking structure. A single pull line can be pulled and released to cause the two locking structures in the two locking parts to move together and switch between an unlocked state and a locked state simultaneously. In the unlocked state, the first support leg and the second support leg can move relative to the main support leg. In the locked state, both the first support leg and the second support leg are axially limited relative to the main support leg.

[0010] In one embodiment, the locking part includes a winding structure that can change the axial extension direction of the pull line. The locking structure includes a first locking block and a second locking block, which are located at both ends of the locking part along the radial direction of the main support leg. After the pull line is connected to the first locking block, it is folded back and connected to the second locking block through the winding structure. A single pull line can be pulled to simultaneously drive the first locking block and the second locking block to abut or release abut against the corresponding secondary tube body along the radial direction of the main support leg.

[0011] In one embodiment, the first locking block includes a first abutting block and a first slider connected to the pull line, the end of the first abutting block away from the first slider being able to abut against the corresponding sub-tube body; the second locking block includes a second abutting block and a second slider connected to the pull line, the end of the second abutting block away from the second slider being able to abut against the corresponding sub-tube body.

[0012] A single pull line can be pulled to cause the first slider and the second slider to simultaneously push the first abutment block and the second abutment block to move radially along the main support leg.

[0013] In one embodiment, the first locking block has a first inclined surface, which is disposed on at least one of the first slider and the first abutting block. The extending direction of the first inclined surface is set at an angle to the moving direction of the first slider. When the first slider moves along the axial direction of the main support leg, the first slider can drive the first abutting block to move radially along the main support leg through the first inclined surface. The second locking block has a second inclined surface, which is disposed on at least one of the second slider and the second abutting block. The extending direction of the second inclined surface is set at an angle to the moving direction of the second slider. When the second slider moves along the axial direction of the main support leg, the second slider can drive the second abutting block to move radially along the main support leg through the second inclined surface.

[0014] In one embodiment, the locking part includes a first elastic element and a second elastic element. The first elastic element is connected to the mounting base and the first slider at both ends along the axial direction of the main support leg, and the second elastic element is connected to the mounting base and the second slider at both ends along the axial direction of the main support leg. In the locked state, a single pull line can be pulled to drive the first slider and the second slider to move along the axial direction of the main support leg simultaneously, overcoming the elastic forces of the first elastic element and the second elastic element, respectively. In the unlocked state, the first elastic element and the second elastic element release their elastic forces simultaneously, driving the first slider and the second slider to move along the axial direction of the main support leg, respectively.

[0015] In one embodiment, the pull line is provided with a first push block and a second push block, the second push block abutting against the first slider and the second push block abutting against the second slider. When the pull line is pulled, the first push block and the second push block simultaneously drive the first slider and the second slider to move along the axial direction of the main support leg.

[0016] In one embodiment, the heavy-duty support leg further includes a conduit with two mounting bases connected to opposite ends of the conduit, and the pull line passes through the conduit and is movable along the axial direction of the conduit.

[0017] In one embodiment, the heavy-duty support leg includes a drive unit, which includes a wrench and a hollow connecting cylinder. The connecting cylinder is connected to the wrench, and the pull line is connected to the connecting cylinder. The wrench is rotatably connected to the mounting base, and the wrench can rotate relative to the mounting base to drive the connecting cylinder to rotate so that the pull line is pulled out.

[0018] In one embodiment, the second leg is movably sleeved inside the first leg. In the retracted state, the second leg is sleeved inside the first leg, and the first leg is sleeved inside the main leg.

[0019] The present invention also provides a heavy-duty support leg, comprising:

[0020] seat body;

[0021] Multiple heavy-duty support legs are rotatably connected to the base to enable the opening and closing of the heavy-duty support legs.

[0022] As can be seen from the above technical solutions, the embodiments of the present invention have at least the following advantages and positive effects:

[0023] This invention provides a double-row tube heavy-duty support leg, which has stronger stability and support strength compared with the traditional single-tube support leg, and can support heavier shooting equipment. The first and second legs can be stored in the main support leg at the same time, making it easy to store and carry. Multiple locking parts can be linked to achieve one-button locking or unlocking. The traction line locks or unlocks at the same time. The double-row tube structure is simpler and more compact than the traditional screw drive locking, and solves the problems of complex structure and easy damage of long-term wear of the transmission components of existing linkage locking. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the overall structure of the heavy-duty support leg in one embodiment of the present invention;

[0026] Figure 2 for Figure 1 The heavy-duty support leg shown is a cross-sectional view along section line AA.

[0027] Figure 3 for Figure 1 A partial explosion diagram of the heavy-duty support leg shown.

[0028] Figure 4 for Figure 2 A partial enlarged view of area B in the sectional view shown;

[0029] Figure 5 for Figure 1 A schematic diagram of the exploded structure of the drive unit and the pull wire shown;

[0030] Figure 6 This is a schematic diagram of the overall structure of a heavy-duty support frame in one embodiment of the present invention.

[0031] The annotations in the attached figures are explained as follows:

[0032] 10. Heavy-duty support legs; 20. Heavy-duty support frame;

[0033] 100. Main support leg; 200. First support leg; 300. Second support leg; 400. Secondary tube body; 500. Pull cable; 600. Drive unit; 700. Base; 800. Central shaft;

[0034] 110. Main body; 120. Locking part; 121. Mounting base; 122. Upper body; 123. Lower body; 124. Winding structure; 124a. First winding post; 124b. Second winding post; 125. Locking structure; 126. First locking block; 126a. First slider; 126b. First abutment block; 126c. First inclined surface; 127. Second locking block; 127a. Second slider; 127b. Second abutment block; 127c. Second inclined surface; 128. First elastic element; 129. Second elastic element; 210. Adapter; 310. Support base; 510. Conduit; 520. First push block; 530. Second push block; 540. Limiting block; 610. Wrench; 611. Threaded hole; 620. Connecting cylinder. Detailed Implementation

[0035] Typical embodiments embodying the features and advantages of the present invention will be described in detail in the following description. It should be understood that the present invention can have various variations in different embodiments without departing from the scope of the present invention, and the descriptions and illustrations herein are for illustrative purposes only and not intended to limit the present invention.

[0036] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0037] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "set up," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0038] First Embodiment

[0039] refer to Figure 1This invention provides a heavy-duty support leg 10, which serves as the core component of a heavy-duty support tripod. Specifically, users can assemble a heavy-duty support tripod using one or more heavy-duty support legs 10 and connecting structures, and then mount the shooting equipment on the heavy-duty support tripod for shooting. The heavy-duty support tripod can stabilize the shooting equipment, preventing the shooting equipment from shaking and affecting the shooting quality during shooting. Users can also adjust different support angles of the heavy-duty support tripod according to their needs to achieve better shooting results. The shooting equipment includes, but is not limited to, cameras, mobile phones, tablets, and camcorders.

[0040] The heavy-duty support leg 10 includes a main support leg 100 and a secondary support leg. The secondary support leg includes a first support leg 200 and a second support leg 300. The first support leg 200 is axially movable within one end of the main support leg 100, and the second support leg 300 is axially movable within the end of the main support leg 100 away from the first support leg 200. The movable arrangement of the first support leg 200 and the second support leg 300 allows the heavy-duty support leg 10 to extend and retract axially. When using the heavy-duty support tripod composed of the heavy-duty support leg 10, the user can adjust the height of the heavy-duty support tripod by adjusting the extension and retraction length of the heavy-duty support leg 10 to meet the shooting height requirements of different usage scenarios.

[0041] The main support leg 100 includes two main tube bodies 110 arranged side by side. The first support leg 200 includes an adapter 210 and two secondary tube bodies 400 arranged side by side. The two opposite ends of the adapter 210 are respectively connected to the two secondary tube bodies 400 of the first support leg 200. The adapter 210 can also mount the heavy-duty support leg 10 on the base of the heavy-duty support frame. The second support leg 300 includes a support base 310 and two secondary tube bodies 400 arranged side by side. The two opposite ends of the support base 310 are respectively connected to the two secondary tube bodies 400 of the second support leg 300. The support base 310 can be placed on flat or uneven ground to make the support of the heavy-duty support frame more stable. The two secondary tube bodies 400 of the first support leg 200 are respectively axially movable within one end of the two main tube bodies 110, and the two secondary tube bodies 400 of the second support leg 300 are respectively axially movable within the end of the two main tube bodies 110 away from the first support leg 200. Compared with the traditional single-tube support leg, the heavy-duty support leg 10 in this invention has a double-tube structure, which improves the structural strength and stability of the heavy-duty support leg 10 and enables it to support heavier shooting equipment.

[0042] refer to Figure 2In one embodiment, the second support leg 300 is movably disposed inside the first support leg 200. In the retracted state, the two secondary tubes 400 of the second support leg 300 are housed within the corresponding two secondary tubes 400 of the first support leg 200, and the two secondary tubes 400 of the first support leg 200 are housed within the corresponding two main tubes 110 of the main support leg 100. This structural design of the heavy-duty support leg 10 with multiple inner tubes can fully utilize the storage space within the main tubes 110, while avoiding interference problems that would occur if the first support leg 200 and the second support leg 300 had the same radial dimensions and were housed within the main tubes 110. It should be understood that in other embodiments, the second support leg 300 may be movably disposed outside the first support leg 200. In the retracted state, the first support leg 200 is housed within the second support leg 300, and the second support leg 300 is housed within the main support leg 100.

[0043] It should be understood that, without considering maximizing the use of the internal space of the main body 110, the radial dimension of the secondary tube 400 of the first leg 200 can be set to be the same as the radial dimension of the secondary tube 400 of the second leg 300. In this case, the sum of the axial dimension of the first leg 200 housed in the main leg 100 and the axial dimension of the second leg 300 housed in the main leg 100 is less than the axial dimension of the storage space of the main leg 100.

[0044] Continue to refer to Figure 2 The main support leg 100 includes two locking parts 120, which are respectively located at both ends of the main support leg 100 in the axial direction. One of the two locking parts 120 can restrict the axial movement of the first support leg 200 relative to the main support leg 100, and the other can restrict the axial movement of the second support leg 300 relative to the main support leg 100. Figure 3 The diagram illustrates that the locking part 120 includes a mounting base 121 and a locking structure 125. The mounting base 121 is connected to two main tube bodies 110 at both ends radially along the main support leg 100. The locking structure 125 is disposed within the mounting base 121 and can move radially along the main support leg 100. When the locking structures 125 of the two locking parts 120 move radially along the main support leg 100 and abut against the corresponding secondary tube body 400, the first support leg 200 and the second support leg 300 are both axially limited relative to the main support leg 100, and the heavy-duty support leg 10 is in a locked state. When the locking structures 125 of the two locking parts 120 move radially along the main support leg 100 and release abut against the corresponding secondary tube body 400, the first support leg 200 and the second support leg 300 can both move axially relative to the main support leg 100, and the heavy-duty support leg 10 is in an unlocked state. The dual locking mechanism 120 enables the heavy-duty support leg 10 to lock and unlock at any length within its telescopic range.

[0045] Continue to refer to Figure 2The heavy-duty support leg 10 includes a pull line 500. The two ends of the pull line 500 are respectively connected to the locking structures 125 of two locking parts 120. The pull line 500 can be pulled and released to cause the two locking structures 125 of the two locking parts 120 to move in tandem, simultaneously switching between a locked state and an unlocked state. Therefore, users can achieve one-click locking or unlocking of the heavy-duty support leg 10 by pulling and releasing the pull line 500. CN217976909U discloses a multi-section tube support leg, which includes two or more interlocking tubes with connecting structures between adjacent tubes. Users need to sequentially open or lock multiple connecting structures to open or retract the support leg. Compared to this multi-section tube support leg, the heavy-duty support leg provided by this invention can achieve one-click locking or unlocking via the pull line 500, reducing operation steps, eliminating the need for frequent bending, and providing a better user experience. It should be understood that the number of pull wires 500 can be one or multiple wires arranged side by side. This invention does not impose any limit on the specific number of pull wires 500.

[0046] Specifically, in one embodiment, the pull wire 500 is a steel wire. Steel wire is a common type of pull wire, possessing advantages such as wear resistance and corrosion resistance, while also being inexpensive. It should be understood that in other embodiments, where wear resistance and corrosion resistance are not considered, the pull wire 500 can be nylon wire, carbon fiber wire, etc.

[0047] In one embodiment, the heavy-duty support leg 10 further includes a hollow conduit 510. The two ends of the conduit 510 along the axial direction are respectively connected to two mounting seats 121 of two locking parts 120. A pull wire 500 passes through the conduit 510 and can move along the axial direction of the conduit 510. The conduit 510 protects the pull wire 500, preventing it from being exposed and subjected to wear or corrosion, which would shorten its service life. It also prevents accidental unlocking of the pull wire 500 during operation, thus ensuring the normal use of the heavy-duty support leg 10. It should be understood that in other embodiments, where the protection of the pull wire 500 is not considered, the heavy-duty support leg 10 may not have a conduit 510.

[0048] refer to Figure 3 In one embodiment, the mounting base 121 includes an upper body 122 and a lower body 123, which are detachably connected. At least one of the upper body 122 and the lower body 123 is provided with a winding structure 124. The locking structure 125 includes a first locking block 126 and a second locking block 127, which are respectively located at both ends of the mounting base 121 along the radial direction of the main support leg 100. The pull line 500 is connected to the first locking block 126, then folded back through the winding structure 124 and connected to the second locking block 127. Figure 4The diagram illustrates that when the pull line 500 is pulled, it simultaneously causes the first locking block 126 and the second locking block 127 to abut against the corresponding secondary tube body 400. The first locking block 126 moves in the opposite direction to the radial movement of the main support leg 100, and the second locking block 127 moves in the opposite direction to the radial movement of the main support leg 100. When the pull line 500 moves in the opposite direction to the pulling action, it simultaneously releases the abutment of the first locking block 126 and the second locking block 127 against the corresponding secondary tube body 400. It should be understood that in other embodiments, the upper seat body 122 can be fixedly connected to the lower seat body 123, and the upper seat body 122 and the lower seat body 123 can also be integrally formed. The present invention does not impose any limitations on the connection structure between the upper seat body 122 and the lower seat body 123.

[0049] Specifically, in one embodiment, the winding structure 124 includes a first winding post 124a and a second winding post 124b. After connecting to the first locking block 126, the pull wire 500 passes sequentially through the first winding post 124a and the second winding post 124b before connecting to the second locking block 127. It should be understood that in other embodiments, the winding structure 124 may be an arc-shaped protrusion, an arc-shaped groove, etc. The present invention does not impose any limitation on the specific structure of the winding structure 124. Any winding structure 124 that can change the axial extension direction of the pull wire 500 should be within the protection scope of the present invention.

[0050] refer to Figure 3 The first locking block 126 includes a first slider 126a and a first abutting block 126b. The first slider 126a is connected to the pull line 500, and the side of the first abutting block 126b facing away from the first slider 126a can abut against the corresponding secondary tube 400. The second locking block 127 includes a second slider 127a and a second abutting block 127b. The second slider 127a is connected to the pull line 500, and the side of the second abutting block 127b facing away from the second slider 127a can abut against the corresponding secondary tube 400. When the pull line 500 is pulled, simultaneously causing the first slider 126a and the second slider 127a to move along the axial direction of the main support leg 100, the first slider 126a and the second slider 127a simultaneously push the first abutting block 126b and the second abutting block 127b to abut against the corresponding secondary tube 400, so that the first support leg 200 and the second support leg 300 simultaneously switch from the unlocked state to the locked state. When the pull line 500 moves in the opposite direction to when it is being pulled, the first leg 200 and the second leg 300 switch from the locked state to the unlocked state.

[0051] Specifically, in one embodiment, one of the first slider 126a and the first abutting block 126b is provided with a first inclined surface 126c, and the other is provided as an outer wall parallel to the axial direction of the main support leg 100. The extending direction of the first inclined surface 126c is set at an angle to the axial direction of the main support leg 100. When the first slider 126a moves along the axial direction of the main support leg 100, the first slider 126a can drive the first abutting block 126b to move radially along the main support leg 100 through the first inclined surface 126c to abut or release from abutment against the corresponding secondary tube body 400. One of the second slider 127a and the second abutting block 127b is provided with a second inclined surface 127c, and the other is provided as an outer wall parallel to the axial direction of the main support leg 100. The function of the second inclined surface 127c is similar to that of the first inclined surface 126c, and will not be described in detail here.

[0052] refer to Figure 3 In one embodiment, the first slider 126a is provided with two first inclined surfaces 126c, and the two first inclined surfaces 126c are respectively provided on the first slider 126a and the first abutting block 126b. Figure 4 The diagram illustrates that the two first inclined surfaces 126c extend in opposite directions and maintain a continuous abutment. When the first slider 126a moves axially along the main support leg 100, it can drive the first abutment block 126b to move radially along the main support leg 100 via the two first inclined surfaces 126c. Compared to the first slider 126a having only a single first inclined surface 126c, the first slider 126a having two continuously abutting first inclined surfaces 126c makes it easier for the first slider 126a to drive the first abutment block 126b, thus achieving a labor-saving effect. The second slider 127a has two second inclined surfaces 127c. The specific positions and functions of the two second inclined surfaces 127c are similar to those of the two first inclined surfaces 126c, and will not be described in detail again.

[0053] refer to Figure 4 The locking part 120 includes a first elastic element 128 and a second elastic element 129. The first elastic element 128 is connected to the mounting base 121 and the first slider 126a at its two ends along the axial direction, respectively. The second elastic element 129 is connected to the mounting base 121 and the second slider 127a at its two ends along the axial direction, respectively. In the locked state, the pull line 500 is pulled, causing the first slider 126a and the second slider 127a to move along the axial direction of the main support leg 100, respectively, overcoming the elastic force of the first elastic element 128 and the elastic force of the second elastic element 129. At this time, the first elastic element 128 and the second elastic element 129 accumulate elastic force due to deformation. In the unlocked state, the pull line 500 moves in the opposite direction to the direction of being pulled, causing the first slider 126a and the second slider 127a to move along the axial direction of the main support leg 100. At the same time, the first elastic element 128 and the second elastic element 129 release their elastic force, and simultaneously cause the first slider 126a and the second slider 127a to move along the axial direction of the main support leg 100, respectively.

[0054] Reference Figure 3 and Figure 4 In one embodiment, the pull line 500 is provided with a first push block 520 and a second push block 530. The first push block 520 abuts against the first slider 126a, and the second push block 530 abuts against the second slider 127a. When the pull line 500 is pulled or released, the first push block 520 and the second push block 530 simultaneously drive the first slider 126a and the second slider 127a to move axially along the main support leg 100, respectively. By abutting against the sliders and driving them to move, the wear caused by friction between the pull line 500 and the first slider 126a and the second slider 127a can be effectively reduced. It should be understood that in other embodiments, the pull line 500 may not be provided with the first push block 520 and the second push block 530. In this case, the pull line 500 is fixedly connected to the first slider 126a and the second slider 127a.

[0055] refer to Figure 3 In one embodiment, the heavy-duty support leg 10 further includes a drive unit 600, which is rotatably connected to the mounting base 121 and connected to the pull line 500. The user can control the heavy-duty support leg 10 to switch between a locked state and an unlocked state by turning the drive unit 600. It should be understood that in other embodiments, when ease of operation and labor saving are not considered, the heavy-duty support leg 10 may not be provided with a drive unit 600, and the user can achieve one-click locking or unlocking of the heavy-duty support leg 10 by directly pulling or releasing the pull line 500.

[0056] Specifically, refer to Figure 5 In one embodiment, the drive unit 600 includes a wrench 610 and a hollow connecting cylinder 620. The wrench 610 has a threaded hole 611, and the outer side wall of the connecting cylinder 620 has threads. The pull line 500 passes through the hollow connecting cylinder 620, and the connecting cylinder 620 is threadedly connected to the threaded hole 611 so that the pull line 500 is connected to the drive unit 600. The pull line 500 is provided with a limit block 540, which abuts against the stepped surface inside the connecting cylinder 620 to prevent the pull line 500 from detaching from the connecting cylinder 620.

[0057] Second Embodiment

[0058] join Figure 6The present invention also provides a heavy-duty support tripod 20, which includes a plurality of the aforementioned heavy-duty support legs 10 and a base 700. The heavy-duty support legs 10 are rotatably connected to the base 700 and arranged at intervals along the circumference of the base 700. The heavy-duty support legs 10 can rotate relative to the base 700 under external force to unfold and form a tripod structure. The base 700 is used to mount the shooting equipment. During shooting, the user can use the heavy-duty support tripod 20 to adjust the shooting height and angle of the shooting equipment to achieve better shooting results. After shooting, the user can detach the shooting equipment from the base 700 and then fold the heavy-duty support legs 10 together to make the folded size smaller and easier to carry.

[0059] refer to Figure 6 In one embodiment, the heavy-duty support tripod 20 further includes a central axis 800, which is movably connected to the base 700. The central axis 800 is axially movable relative to the base 700. A transition structure is provided at the end of the central axis 800 away from the heavy-duty support leg 10, allowing for the connection of an external shooting device. After the heavy-duty support leg 10 is fixed, the user can control the central axis 800 to move axially relative to the base 700 to adjust the shooting height of the shooting device. This is more convenient and stable than controlling the shooting height of the shooting device by extending or retracting the heavy-duty support leg 10. When the adjustable shooting height range is equal, because the central axis 800 can adjust the shooting height, the required axial dimension of the heavy-duty support leg 10 is smaller. In the folded state, the heavy-duty support tripod 20 has a more compact structure, occupies less space, and is easier to carry. It should be understood that in other embodiments, where compactness and portability are not considered, the heavy-duty support tripod 20 may omit the central axis 800.

[0060] Although the invention has been described with reference to several typical embodiments, it should be understood that the terminology used is illustrative and exemplary, and not restrictive. Since the invention can be embodied in many forms without departing from the spirit or essence of the invention, it should be understood that the above embodiments are not limited to any of the foregoing details, but should be interpreted broadly within the spirit and scope defined by the appended claims. Therefore, all variations and modifications falling within the scope of the claims or their equivalents should be covered by the appended claims.

Claims

1. A heavy-duty support leg, characterized in that, include: The main support leg (100) includes two main bodies (110) arranged side by side, and a locking part (120) connected to the two main bodies (110). The number of locking parts (120) is two, and the two locking parts (120) are located at both ends of the axial direction of the main support leg (100). The auxiliary support leg includes a first support leg (200) and a second support leg (300). Both the first support leg (200) and the second support leg (300) include two parallel and connected auxiliary tube bodies (400). The auxiliary tube body (400) of the first support leg (200) is axially movably disposed in one end of the main body (110), and the auxiliary tube body (400) of the second support leg (300) is axially movably disposed in the other end of the main body (110). The locking part (120) includes a mounting base (121) and a locking structure (125). The mounting base (121) connects to both main bodies (110). The locking structure (125) is movably mounted on the mounting base (121) along the radial direction of the main support leg (100). The heavy-duty support leg (10) also includes a pull line (500) connected to the locking structure (125). A single pull line (500) can be pulled and released to make the two locking structures (125) of the two locking parts (120) move together and switch between the unlocked state and the locked state simultaneously. In the unlocked state, the first support leg (200) and the second support leg (300) can move relative to the main support leg (100). In the locked state, both the first support leg (200) and the second support leg (300) are relative to the main support leg (100). The outrigger (100) is axially limited; the locking part (120) includes a winding structure (124), which can change the axial extension direction of the pull line (500). The locking structure (125) includes a first locking block (126) and a second locking block (127). The first locking block (126) and the second locking block (127) are located at both ends of the locking part (120) along the radial direction of the main outrigger (100). After the pull line (500) is connected to the first locking block (126), it is folded back and connected to the second locking block (127) through the winding structure (124). A single pull line (500) can be pulled to simultaneously drive the first locking block (126) and the second locking block (127) to abut or release abut against the corresponding secondary tube body (400) along the radial direction of the main outrigger (100).

2. The heavy-duty support leg according to claim 1, characterized in that, The first locking block (126) includes a first abutting block (126b) and a first slider (126a) connected to the pull line (500). The end of the first abutting block (126b) away from the first slider (126a) can abut against the corresponding sub-tube body (400). The second locking block (127) includes a second abutting block (127b) and a second slider (127a) connected to the pull line (500). The end of the second abutting block (127b) away from the second slider (127a) can abut against the corresponding sub-tube body (400). A single pull wire (500) can be pulled to cause the first slider (126a) and the second slider (127a) to simultaneously push the first abutment block (126b) and the second abutment block (127b) to move radially along the main support leg (100).

3. The heavy-duty support leg according to claim 2, characterized in that, The first locking block (126) is provided with a first inclined surface (126c). The first inclined surface (126c) is provided in at least one of the first slider (126a) and the first abutting block (126b). The extension direction of the first inclined surface (126c) is set at an angle to the moving direction of the first slider (126a). When the first slider (126a) moves along the axial direction of the main support leg (100), the first slider (126a) can drive the first abutting block (126b) to move radially along the main support leg (100) through the first inclined surface (126c). The second locking block (127) is provided with a second inclined surface (127c). The second inclined surface (127c) is provided in at least one of the second slider (127a) and the second abutting block (127b). The extension direction of the second inclined surface (127c) is set at an angle to the moving direction of the second slider (127a). When the second slider (127a) moves along the axial direction of the main support leg (100), the second slider (127a) can drive the second abutting block (127b) to move radially along the main support leg (100) through the second inclined surface (127c).

4. The heavy-duty support leg according to claim 2, characterized in that, The locking part (120) includes a first elastic element (128) and a second elastic element (129). The first elastic element (128) is connected to the mounting base (121) and the first slider (126a) at both ends along the axial direction of the main support leg (100), respectively. The second elastic element (129) is connected to the mounting base (121) and the second slider (127a) at both ends along the axial direction of the main support leg (100), respectively. In the locked state, a single pull line (500) can be pulled to drive the first slider (126a) and the second slider (127a) to move along the axial direction of the main support leg (100) simultaneously, overcoming the elastic force of the first elastic element (128) and the elastic force of the second elastic element (129), respectively. In the unlocked state, the first elastic element (128) and the second elastic element (129) release their elastic force simultaneously, respectively driving the first slider (126a) and the second slider (127a) to move along the axial direction of the main support leg (100).

5. The heavy-duty support leg according to claim 4, characterized in that, The pull line (500) is provided with a first push block (520) and a second push block (530). The second push block (530) abuts against the first slider (126a) and the second push block (530) abuts against the second slider (127a). When the pull line (500) is pulled, the first push block (520) and the second push block (530) simultaneously drive the first slider (126a) and the second slider (127a) to move along the axial direction of the main support leg (100).

6. The heavy-duty support leg according to claim 1, characterized in that, The heavy-duty support leg (10) also includes a conduit (510), with two mounting bases (121) connected to opposite ends of the conduit (510). The pull line (500) passes through the conduit (510) and can move along the axial direction of the conduit (510).

7. The heavy-duty support leg according to claim 1, characterized in that, The heavy-duty support leg (10) includes a drive unit (600), which includes a wrench (610) and a hollow connecting tube (620). The connecting tube (620) is connected to the wrench (610), and the pull line (500) is connected to the connecting tube (620). The wrench (610) is rotatably connected to the mounting base (121). The wrench (610) can rotate relative to the mounting base (121) to drive the connecting tube (620) to rotate so that the pull line (500) can be pulled out.

8. The heavy-duty support leg according to claim 1, characterized in that, The second leg (300) is movably sleeved inside the first leg (200). In the retracted state, the second leg (300) is sleeved inside the first leg (200), and the first leg (200) is sleeved inside the main leg (100).

9. A heavy-duty support leg, characterized in that, include: base(700); Multiple heavy-duty support legs (10) as described in any one of claims 1 to 8, wherein the multiple heavy-duty support legs (10) are rotatably connected to the base (700) to enable the opening and closing of the heavy-duty support leg (20).

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