Tripod with one-button operation

Abstract

Tripod for one-button operation, comprising a mounting platform (100), at least three support legs (200) each connected at one end to the mounting platform (100), and an operating handle (300) connected to the mounting platform (100); characterized in that each of the support legs (200) comprises the following: a support leg head end (210), one end of which is connected to the mounting platform (100); a leg tube assembly (220) comprising several leg tubes arranged sequentially from the outside to the inside and axially extendable and retractable, wherein one end of the outermost leg tube is fixedly connected to the support leg head end (210); a leg tube locking device located inside the support leg (200) and used to lock or unlock the multiple leg tubes; a transmission shaft assembly which is arranged on the support leg (200) and rotatable about its own axis, wherein the transmission shaft assembly is connected to the leg tube locking device in a transmission manner; a gearbox unit which is attached to the support leg head end (210) and whose power output end is connected to the gearbox shaft assembly in terms of transmission technology; a pull cable (410) connected to the power receiving end of the gear unit, wherein the pull cable (410) places the leg tube locking device in a locked or unlocked state via the gear unit and the gear shaft assembly, the at least three pull cables (410) extending beyond the support leg head end (210) are each connected to the operating handle (300), while the operating handle (300) serves to simultaneously exert a pulling force on the at least three pull cables (410).

Description

Technical field

[0001] The present invention relates to the technical field of photographic accessory equipment, in particular a tripod for one-button operation. State of the art

[0002] A photographic tripod primarily consists of a mounting platform and three leg assemblies, each connected to the mounting platform at one end. The mounting platform holds photographic equipment such as cameras. Each leg assembly comprises several extendable and retractable leg tubes. A locking mechanism is located between two adjacent leg tubes, with each locking mechanism having an independent lock / unlock switch. To extend all leg tubes of a leg assembly, both sets of lock / unlock switches must be opened. To set up the entire tripod, six lock / unlock switches must be operated, making it very cumbersome to use.

[0003] To improve upon the cumbersome locking / unlocking mechanism of conventional tripods, the tripod's mounting platform has been equipped with a control handle. This handle allows users to lock or unlock the extension and retraction function of all three leg assemblies with a single button press. When locked, none of the three leg assemblies can be extended or retracted. When unlocked, users can adjust the height of the support structure by extending or retracting the leg assemblies.

[0004] On some one-button tripods, the operating handle is hydraulically driven. This hydraulically driven handle houses a hydraulic cylinder, while the outrigger assembly contains a piston cylinder and piston rod. The locking mechanism between two adjacent outrigger tubes is rigidly connected to the piston rod. The hydraulic cylinder supplies hydraulic oil to the piston cylinders within the three outrigger assemblies via several hydraulic hoses. The piston rod drives the locking mechanism to lock and unlock two adjacent outrigger tubes.

[0005] However, with such tripods featuring hydraulically actuated locking mechanisms, two adjacent support leg tubes cannot achieve immediate locking due to the time it takes for the hydraulic oil to flow through the oil lines, resulting in a locking delay that fundamentally needs improvement. Content of the invention

[0006] Therefore, the technical problem solved by the present invention is to overcome the disadvantages of the hydraulic drive mechanism used in the tripod's drive handle for locking the support legs, as this does not allow for immediate locking and impairs ease of use. Consequently, a tripod with one-button operation is provided.

[0007] To solve the aforementioned technical problems, the technical solution of the present invention is as follows: A tripod for one-button operation, comprising a mounting platform, at least three support legs each connected at one end to the mounting platform, and an operating handle connected to the mounting platform, each of the support legs comprising: a support leg head end, one end of which is connected to the mounting platform; a leg tube assembly comprising several leg tubes arranged sequentially from the outside inwards and axially extendable and retractable, wherein one end of the outermost leg tube is fixedly connected to the support leg head end; a leg tube locking device located inside the support leg and used to lock or unlock the multiple leg tubes; a gear shaft assembly which is arranged on the support leg and rotatable about its own axis, wherein the gear shaft assembly is connected to the leg tube locking device in terms of transmission technology; a gearbox unit that is attached to the head end of the support leg and whose power output end is connected to the gearbox shaft assembly in terms of transmission technology; a pull cable connected to the power receiving end of the gearbox unit, wherein the pull cable moves the leg tube locking device into a locked or unlocked state via the gearbox unit and gearbox shaft assembly; wherein the at least three pull cables extending beyond the end of the support leg are each connected to the operating handle, while the operating handle serves to simultaneously exert a pulling force on the at least three pull cables.

[0008] Furthermore, the gearbox unit is mounted within the support leg head end, and the gearbox unit comprises the following: a rotating shaft which is connected to the support leg head end and is rotatably mounted around its own axis; a swivel arm which is fixed to the rotating shaft at one end and to the pull cable at the other end; a first gear which is fitted over the rotating shaft and is firmly connected to it, and which rotates synchronously with the swivel arm; a second gear connected to the support leg head end and rigidly coaxially connected to the transmission shaft assembly, wherein the second gear is transmissionally connected to the first gear, wherein When the pull cable is operated, it drives the swivel arm, the rotating shaft and the first gear to rotate axially around the rotating shaft, and the first gear drives the second gear and the transmission shaft assembly to each rotate axially around their own axis.

[0009] Furthermore, the gear unit also includes a right-angled double-sided rack which is transmissionally connected between the first gear and the second gear, wherein the right-angled double-sided rack comprises a first rack and a second rack with mutually perpendicular tooth surfaces, wherein the first rack meshes with the first gear and the second rack meshes with the second gear.

[0010] Furthermore, the tooth spacing of the first rack is larger than that of the second rack.

[0011] Furthermore, the underside of the support leg head end is provided with a linear sliding groove, wherein the guide direction of the linear sliding groove runs parallel to the longitudinal direction of the first rack, wherein the right-angled double-sided rack includes a rack slider which is slidably connected to the linear sliding groove along the guide direction of the linear sliding groove.

[0012] Furthermore, a return spring is provided in the linear sliding groove, wherein, when the swivel arm is rotated due to the pulling actuation by the pull cable, the return spring is compressed by the rack slide and stores an elastic potential energy.

[0013] Furthermore, the linear sliding groove has a guide rod which is firmly connected to the support leg head end, wherein the axial direction of the guide rod runs parallel to the longitudinal direction of the first rack and the rack slide is arranged slipped over the outer circumference of the guide rod and is slidably connected to the guide rod.

[0014] Furthermore, a lateral mounting bracket is fixedly connected to the inner wall of the support leg head end, wherein one end of the pivot shaft is connected to the lateral mounting bracket, the lateral mounting bracket has an arcuate limiting groove, and the center point of the arcuate limiting groove lies on the axis of the pivot shaft, wherein a guide shaft is fixedly arranged at the end of the swivel arm connected to the pull cable, the axial direction of the guide shaft is parallel to that of the pivot shaft, and one end of the guide shaft extends into the arcuate limiting groove.

[0015] Furthermore, the gear unit also includes a torsion spring which is arranged fitted over the outer circumference of the rotating shaft, the torsion spring being arranged between the swivel arm and the lateral mounting bracket, with one end of the torsion spring connected to the lateral mounting bracket and the other end to the swivel arm, wherein when the swivel arm is rotated due to a pulling actuation by the pull cable, the torsion spring is twisted and stores elastic potential energy.

[0016] Furthermore, the mounting platform comprises a centrally arranged connection for mounting photographic equipment and an annular cavity formed circumferentially around the connection in the mounting platform, wherein the annular cavity is surrounded internally by several protective sleeves, one end of each of the several protective sleeves projecting through the mounting platform and connected to the operating handle, the other end of each of the several protective sleeves projecting through the mounting platform and connected to each of the several support leg head ends, and the several pull cables are each guided through an inner channel of the several protective sleeves.

[0017] Furthermore, the leg tube assembly comprises a front leg tube, a middle leg tube and a rear leg tube, which are arranged sequentially from the outside in and are axially extendable and retractable, wherein the front leg tube, the middle leg tube and the rear leg tube remain fixed relative to each other in the circumferential direction, wherein the leg tube locking device comprises a first locking device arranged between the front leg tube and the middle leg tube, and a second locking device arranged between the middle leg tube and the rear leg tube, wherein the transmission shaft assembly comprises an internal transmission shaft which is fixedly connected at one end to the power output end of the transmission unit, and an external transmission shaft which is fitted over the outer circumference of the internal transmission shaft and is fixed relative to each other in the circumferential direction relative to the internal transmission shaft and is arranged to slide axially relative to each other, while the external transmission shaft can be connected to the first locking device via operation in order to releasably prevent movement of the middle leg tube relative to the front leg tube, and the external transmission shaft can be connected to the second locking device via operation in order to releasably prevent movement of the rear leg tube relative to the middle leg tube.

[0018] Furthermore, the first locking device comprises the following: a first fixed sleeve which is fixedly connected to the middle leg tube, wherein one end extends into the front leg tube and a first inclined conical surface is formed on the outer wall of the first fixed sleeve; a first rotary sleeve which is arranged to be rotatable relative to each other in the circumferential direction relative to each other, coaxial to the first fixed sleeve and axially relative to each other, while the first rotary sleeve is placed over the outer circumference of the external transmission shaft and is arranged to be fixed relative to each other in the circumferential direction relative to each other relative to the external transmission shaft; a first sliding bushing which is arranged inside the front leg tube and is arranged at least partially fitted over the outer circumference of the first fixed sleeve, wherein the first sliding bushing is screwed to the outer circumference of the first rotating sleeve, wherein, when the external gear shaft drives the first rotary sleeve to a circumferential rotation, one end of the first sliding bushing slides into a gap between the first fixed sleeve and the front leg tube, pressing the first inclined conical surface of the first fixed sleeve to allow locking of the front leg tube and the middle leg tube, or the end of the first sliding bushing slides out of the gap between the first fixed sleeve and the front leg tube, releasing the first inclined conical surface of the first fixed sleeve to allow unlocking of the front leg tube and the middle leg tube.

[0019] Furthermore, a first ball bearing is embedded in the first sliding bushing, with part of the first ball bearing projecting beyond the inner wall surface of the first sliding bushing and bearing against the first inclined conical surface.

[0020] Furthermore, the first inclined conical surface comprises a first inclined conical surface of the first stage and a first inclined conical surface of the second stage, which are arranged successively in the axial direction of the first fixed sleeve, wherein the first ball bearings are two, the two first ball bearings being in contact with the first inclined conical surface of the first stage and with the first inclined conical surface of the second stage.

[0021] Furthermore, the first locking device further comprises a first limiting sleeve which is firmly fitted over the outer circumference of the first rotary sleeve inside the front leg tube, wherein the first limiting sleeve is arranged at the end of the first sliding bushing near the end of the support leg and wherein a first elastic element is provided between the first limiting sleeve and the first sliding bushing.

[0022] Furthermore, the structure of the second locking device is identical to that of the first locking device.

[0023] Furthermore, the operating handle comprises an operating section connected to the mounting platform and a movement section driven by the operating section, wherein at least three of the pull cables extend beyond the support leg head end and are each connected to the movement section.

[0024] Furthermore, the operating instructions section includes the following: a handle shaft, one end of which is connected to the mounting platform, wherein the handle shaft has an internal space for movement, and the handle shaft is provided with a through slot extending radially through the handle shaft and along its own axial direction; a handle swivel sleeve which is fitted over the outer circumference of the handle shaft and is axially fixed relative to each other relative to the handle shaft and arranged to be rotatable relative to each other in the circumferential direction, the movement section includes the following: a handle sliding sleeve which is arranged to be slidably positioned over the outer circumference of the handle shaft in the axial direction of the handle shaft and is screwed to the inner wall of the handle rotary sleeve; a retaining pin which is firmly connected to the handle sliding sleeve and axially slidable along the handle shaft and connected to the through slot, wherein the multiple pull cables are firmly connected to the retaining pin through the interior of the handle shaft.

[0025] Furthermore, the retaining pin is provided with several through-holes through which the pull cables are guided, the pull cable being connected to a limiting head end of the pull cable which has a larger outer diameter than the through-hole and abuts the retaining pin to ensure position limitation.

[0026] Furthermore, the outer wall of the handle shaft is provided with an outwardly projecting limiting rib, wherein the longitudinal direction of the limiting rib extends along the axial direction of the handle shaft, and the inner wall of the handle sliding sleeve is provided with a limiting recess that slidably engages with the limiting rib.

[0027] Furthermore, a handle joint is rigidly connected to the outer circumference of the mounting platform, wherein the operating handle comprises a handle connection base which is rigidly connected to the end of the handle shaft near the handle joint, wherein the handle connection base is pivotably connected to the handle joint about a hinge axis and wherein the hinge axis is connected to a handle locking knob to lock the handle connection base and the handle joint.

[0028] The one-button operation tripod provided by the present invention offers the following advantages: One end of the pull cable is connected to the gear unit of the support leg. When the pull cable is pulled, it drives the leg tube locking device via the gear unit and the gear shaft assembly to lock or unlock the multiple leg tubes of the leg tube assembly. Simultaneously, the other end of the pull cable, which is connected to at least three support legs, is connected to the operating handle. When the operating handle is actuated, it simultaneously exerts a pulling force on at least three pull cables, thereby locking or unlocking at least three support legs at the same time. This allows multiple support legs to be locked and unlocked with a single button press, simplifies operation, and effectively increases the adjustment speed for extending and retracting the support legs.Compared to existing one-button tripods with an electrically controlled handle, this design requires no charging and eliminates the need to carry additional equipment such as chargers or power banks, thus offering superior mobility. Unlike existing one-button tripods with a hydraulically driven handle, it allows for instant locking without any delay. In the gear unit, the larger tooth spacing of the first rack relative to the second rack allows for a higher gear ratio. Consequently, with a constant locking force, comparatively less force is required on the handle to unlock the tripod, resulting in energy savings.When the operating handle is turned to the unlocked position, the torsion spring and the return spring are released, allowing immediate rotation of the gear shaft assembly. This, in turn, instantly drives the leg tube locking device to lock the multiple leg tubes without any perceptible locking delay. Illustration of the attached figures

[0029] To more clearly illustrate the specific embodiments of the present invention or the prior art technical solutions, the drawings used in these specific embodiments or in the prior art description are briefly presented below. Naturally, the drawings in the following description represent some embodiments of the present invention. Other drawings can be obtained by the person skilled in the art based on these drawings without any creative effort. Fig. Figure 1 shows a three-dimensional representation of the structure of the tripod for one-button operation in an embodiment of the present invention; Fig. Figure 2 shows a three-dimensional representation of the structure of the support leg in an embodiment of the present invention; Fig. Figure 3 shows a cross-section of the support leg in an embodiment of the present invention; Fig. Figure 4 is an enlarged view of section A in Fig. 3; Fig. Figure 5 shows a three-dimensional representation of the structure of the transmission unit in an embodiment of the present invention; Fig. Figure 6 schematically shows the structure of the gear unit within the support leg head end in an embodiment of the present invention; Fig. Figure 7 is an enlarged view of section B in Fig. 3; Fig. Figure 8 is an enlarged view of section C in Fig. 3; Fig. Figure 9 schematically shows the connection relationship between the mounting platform, the support leg, the operating handle and the protective sleeve in an embodiment of the present invention; Fig. Figure 10 shows a three-dimensional representation of the structure of the operating handle in an embodiment of the present invention; Fig. Figure 11 shows a cross-section of the operating handle in an embodiment of the present invention; Fig. Figure 12 schematically shows the connection between the handle shaft and the retaining pin in an embodiment of the present invention. Reference symbol list: 100 assembly platform; 101 Ring-shaped cavity; 110 connection; 120 leg connection bracket; 200 support leg; 210 Support leg head end; 211 Side mounting bracket; 211A Arc-shaped limiting groove; 212 Linear sliding groove; 213 warehouses; 220 Leg tube assembly; 221 Front leg tube; 222 Middle leg tube; 223 Rear leg tube; 231 First fixed sleeve; 231A First inclined conical surface of the first stage; 231B First inclined conical surface of the second stage; 232 First rotary sleeve; 233 First sliding bushing; 234 First ball bearing; 235 First limiting sleeve; 236 First elastic element; 241 Second fixed sleeve; 241A Second inclined conical surface of the first stage; 241B Second-sloping conical surface of the second stage; 242 Second rotating sleeve; 243 Second sliding bushing; 244 Second ball bearing; 245 Second limiting sleeve; 246 Second elastic element; 251 Internal gear shaft; 252 External gear shaft; 261 Rotary shaft; 262 Swivel arm; 263 First gear; 264 Second gear; 265 Right-angled double-sided rack; 265 First rack; 2652 Second rack; 2653 Rack and pinion slide; 266 Return spring; 267 Guide rod; 268 Guide shaft; 269 ​​Torsion spring; 300 operating handle; 310 handle stock; 311 Movement space; 312 Through-slot; 313 Boundary rib; 320 Handle swivel sleeve; 330 Handle sliding sleeve; 340 retaining pin; 350 handle joint; 360° handle connection base; 370 Handle locking button; 410 traction cables; 420 Protective sleeve. Specific embodiment

[0030] The technical solutions of the present invention are clearly and completely described below in conjunction with the accompanying drawings, whereby the described embodiments are, of course, part of the embodiments of the present invention and not all embodiments. Based on the embodiments in the present invention, all other embodiments that a person skilled in the art obtains without any creative work fall within the scope of protection of the present invention.

[0031] In describing the invention, it should be noted that the terms "center," "top," "bottom," "left," "right," "vertical," "horizontal," "inside," "outside," etc., refer to orientations or positions shown in the accompanying drawings. These terms are used solely to facilitate and simplify the description of the invention and are not intended to indicate or imply that the arrangement or component referred to has a specific orientation or must be constructed and operated in a particular manner. Therefore, they should not be understood as limiting the invention. The terms "first," "second," and "third" are used for descriptive purposes only and are not to be interpreted as indicating or implying any relative meaning.

[0032] In describing the present invention, it should be noted that, unless expressly stated and defined otherwise, the terms "installation," "connection," and "connection" are to be understood in a broad sense. For example, they may refer to a permanent connection, a detachable connection, or a bonded connection; they may refer to a mechanical connection or an electrical connection; they may refer to a direct connection or an indirect connection via an intermediate medium; and they may refer to communication between two components. The specific meaning of the aforementioned terms in the context of the invention will be readily apparent to a person skilled in the art.

[0033] As in Fig. As shown in Figure 1, a one-button operated tripod comprises a mounting platform, three support legs, each hinged at one end to the mounting platform, and an operating handle connected to the mounting platform. A mounting point for attaching photographic equipment is located in the center of the mounting platform. Three support legs are connected to the outer circumference of the mounting platform and are spaced equally around the platform's circumference. An operating handle is also connected to the outer circumference of the mounting platform and can be gripped by hand for operation. It is understood that the number of support legs is not limited to three and may be greater than three.

[0034] As in Fig. 1 and Fig. As shown in Figure 2, the support leg 200 comprises a support leg head end 210 and a leg tube assembly 220. The support leg head end 210 is hinged at one end to the mounting platform 100. The leg tube assembly 220 comprises a front leg tube 221, a middle leg tube 222, and a rear leg tube 223, arranged sequentially from the outside in and capable of axial extension and retraction. The front leg tube 221 and the middle leg tube 222 are circumferentially fixed relative to each other and axially slidable relative to each other. Similarly, the middle leg tube 222 and the rear leg tube 223 are circumferentially fixed relative to each other and axially slidable relative to each other. One end of the front leg tube 221 is rigidly connected to the support leg head end 210.The detailed structure by which the front leg tube 221, the middle leg tube 222, and the rear leg tube 223 are fixed relative to each other circumferentially and arranged to slide axially relative to each other is prior art and does not constitute the central inventive feature of the present application; it is not explained in detail here. It is also understood that the number of leg tubes comprising the leg tube assembly 220 is not limited to three; it can equally comprise two, four, or a greater number.

[0035] As in Fig. 2, Fig. 3 and Fig. As shown in Figure 4, the support leg 200 further comprises a leg tube locking device and a transmission shaft assembly located within the support leg 200. The leg tube locking device serves to lock or unlock the front leg tube 221, the middle leg tube 222, and the rear leg tube 223. The transmission shaft assembly is arranged on the support leg 200 and is rotatable about its own axis, with the transmission shaft assembly being connected to the leg tube locking device. In particular, the leg tube locking device comprises a first locking device for locking or unlocking between the front leg tube 221 and the middle leg tube 222, and a second locking device for locking or unlocking between the middle leg tube 222 and the rear leg tube 223.The transmission shaft assembly comprises an internal transmission shaft 251 and an external transmission shaft 252, which are arranged coaxially and are axially extendable and retractable. One end of the internal transmission shaft 251 is fixedly connected inside the support leg head end 210 and is rotatable about its own axis. The other end of the internal transmission shaft 251 extends into the interior of the front leg tube 221. The external transmission shaft 252 is fitted over the outer circumference of the internal transmission shaft 251 and is fixed relative to the internal transmission shaft 251 in the circumferential direction. When the internal transmission shaft 251 rotates, the external transmission shaft 252 rotates synchronously with the internal transmission shaft 251.The external transmission shaft 252 can be connected to the first locking device via operation to prevent releasable movement of the middle leg tube 222 relative to the front leg tube 221, and the external transmission shaft 252 can be connected to the second locking device via operation to prevent releasable movement of the rear leg tube 223 relative to the middle leg tube 222.

[0036] As in Fig. 3, Fig. 4 and Fig. As shown in Figure 5, the support leg 200 further comprises a gear unit located within the support leg head end 210. The gear unit includes a power-receiving end and a power-output end, the power-output end of the gear unit being rigidly connected to one end of the internal gear shaft 251. The power-receiving end of the gear unit is connected to a pull cable 410, the other end of which is connected to the operating handle 300. The three pull cables 410, which are connected to the three support legs 200, extend beyond the support leg head end 210 and are all connected to the operating handle 300. The operating handle 300 can simultaneously exert a pulling force on all three pull cables 410. When the operating handle 300 is actuated to exert the pulling force on the pull cable 410, the pull cable 410 sets the power-receiving end of the gear unit in motion.This, in turn, causes the power output end of the gearbox unit to drive the internal gear shaft 251 and the external gear shaft 252 to rotate about their respective axes. When both the first and second locking devices are locked, the pull cable 410 drives the external gear shaft 252 to rotate about its own axis. As the external gear shaft 252 rotates, it simultaneously unlocks both the first and second locking devices. At this point, the front leg tube 221, the middle leg tube 222, and the rear leg tube 223 are unlocked, allowing the length of the support leg 200 to be adjusted by sliding the leg tubes. Once the desired length of the support leg 200 is reached, the pull cable 410 is reset by pulling the operating handle 300 in the opposite direction.The external drive shaft 252 then rotates in the direction of the locking mechanism. Simultaneously, the external drive shaft 252 returns both the first and second locking devices to their locked positions. This enables the simultaneous and rapid locking or unlocking of multiple locking devices between the several leg tubes of the support leg 200, thus simplifying operation.

[0037] As in Fig. 3, Fig. 4 and Fig. As shown in Figure 5, the gear unit is entirely located within the outrigger head end 210. The gear unit comprises a pivot shaft 261, a swivel arm 262, a first gear 263, a second gear 264, a return spring 266, a guide rod 267, a guide shaft 268, and a torsion spring 269. The inner wall of the outrigger head end 210 is fixedly connected to a lateral mounting bracket 211. The pivot shaft 261 is connected between an inner wall of the outrigger head end 210 and the lateral mounting bracket 211, and the pivot shaft 261 is rotatably mounted about its own axis. One end of the swivel arm 262 is fixedly connected to the pivot shaft 261, while the other end of the swivel arm 262 is provided with a cable attachment opening for securing the pull cable 410. The first gear 263 is fitted over the rotating shaft 261 and is firmly connected to it, and the first gear 263 rotates synchronously with the swivel arm 262.The second gear 264 is connected to the support leg head end 210 and rigidly coaxially connected to the transmission shaft assembly, with the second gear 264 being connected to the first gear 263 via a meshing power transmission configuration. The internal transmission shaft 251 is connected to the underside of the support leg head end 210 via the bearing 213, allowing axial rotation about its own axis. The second gear 264 is rigidly connected to the internal transmission shaft 251. It is understood that the first gear 263 and the second gear 264 can mesh directly to provide power transmission, or alternatively, they can use an intermediate gear component to enable an indirect meshing power transmission configuration.When pulled, the pull cable 410 drives the swivel arm 262, the rotary shaft 261 and the first gear 263 to rotate axially around the rotary shaft 261, and the first gear 263 drives the second gear 264 and the internal transmission shaft 251 to each rotate axially around their own axis.

[0038] As in Fig. 4, Fig. 5 and Fig. As shown in Figure 6, the gear unit further comprises a right-angled, double-sided rack 265, which is connected between the first gear 263 and the second gear 264. The right-angled, double-sided rack 265 comprises a first rack 2651 and a second rack 2652 with mutually perpendicular tooth surfaces, wherein the first rack 2651 meshes with the first gear 263 and the second rack 2652 meshes with the second gear 264. Furthermore, the tooth spacing of the first rack 2651 is larger than that of the second rack 2652. In the right-angled, double-sided rack 265, the larger tooth spacing of the first rack 2651 relative to the second rack 2652 enables a higher gear ratio.Consequently, with a constant locking force of the locking device, a comparatively smaller force on the operating handle 300 is sufficient to enable unlocking, thus achieving a saving of force.

[0039] As in Fig. 4, Fig. 5 and Fig. As shown in Figure 6, the underside of the support leg head end 210 is provided with a linear sliding groove 212, the guide direction of which is parallel to the longitudinal direction of the first rack 2651. The right-angled double-sided rack 265 comprises a rack slide 2653, which is slidably connected to the linear sliding groove 212 along the guide direction of which it is connected. The linear sliding groove 212 has a guide rod 267, which is fixedly connected to the support leg head end 210, the axial direction of which is parallel to the longitudinal direction of the first rack 2651, and the rack slide 2653 being arranged to fit over the outer circumference of the guide rod 267 and being slidably connected to it.

[0040] As in Fig. 4, Fig. 5 and Fig. As shown in Figure 6, a return spring 266 is provided in the linear sliding groove 212. When the pivot arm 262 is rotated due to the pulling actuation by the pull cable 410, the return spring 266 is compressed by the rack slide 2653 and stores elastic potential energy. A torsion spring 269 is arranged fitted over the outer circumference of the pivot shaft 261. The torsion spring 269 is located between the pivot arm 262 and the lateral mounting bracket 211, with one end of the torsion spring 269 connected to the lateral mounting bracket 211 and the other end to the pivot arm 262. When the pivot arm 262 is rotated due to the pulling actuation by the pull cable 410, the torsion spring 269 is twisted and stores elastic potential energy. When the operating handle 300 is turned into the unlocked position, the pulling force exerted on the pull cable 410 is released.The torsion spring 269 and the return spring 266 are released, allowing immediate rotation of the internal gear shaft 251 and the external gear shaft 252. This, in turn, immediately drives the first locking device to lock the middle leg tube 222 and the front leg tube 221. Simultaneously, the second locking device is driven to lock the rear leg tube 223 and the middle leg tube 222. No perceptible delay occurs during the locking process of the support leg 200.

[0041] As in Fig. 4, Fig. 5 and Fig. As shown in Figure 6, the lateral mounting bracket 211 has an arcuate limiting groove 211A on one side, the center of which lies on the axis of the pivot shaft 261. A guide shaft 268 is fixedly arranged at the end of the swivel arm 262 connected to the pull cable 410, with the axis of the guide shaft 268 running parallel to that of the pivot shaft 261 and one end of the guide shaft 268 extending into the arcuate limiting groove 211A. The interaction between the guide shaft 268 and the arcuate limiting groove 211A enables the swivel arm 262 to pivot in a predetermined direction and within a predetermined angular range.

[0042] As in Fig. As shown in Figure 7, the first locking device comprises a first fixed sleeve 231, a first rotary sleeve 232, and a first sliding bushing 233. The first fixed sleeve 231 is fixedly connected inside the middle leg tube 222, with one end extending into the front leg tube 221 and a first inclined conical surface formed on the outer wall of the first fixed sleeve 231. The first rotary sleeve 232 is coaxial with the first fixed sleeve 231 and is axially fixed relative to the first fixed sleeve 231 and rotatable relative to each other in the circumferential direction. The first rotary sleeve 232 is fitted over the outer circumference of the external transmission shaft 252 and is fixed relative to the external transmission shaft 252 in the circumferential direction.The first sliding bushing 233 is arranged inside the front leg tube 221 and is partially fitted over the outer circumference of the first fixed sleeve 231, wherein the first sliding bushing 233 is screwed to the outer circumference of the first rotating sleeve 232. When the external gear shaft 252 drives the first rotary sleeve 232 to a circumferential rotation, one end of the first sliding bushing 233 slides into a gap between the first fixed sleeve 231 and the front leg tube 221, pressing the first inclined conical surface of the first fixed sleeve 231 to allow locking of the front leg tube 221 and the middle leg tube 222, or the end of the first sliding bushing 233 slides out of the gap between the first fixed sleeve 231 and the front leg tube 221, releasing the first inclined conical surface of the first fixed sleeve 231 to allow unlocking of the front leg tube 221 and the middle leg tube 222.

[0043] As in Fig. As shown in Figure 7, a first ball bearing 234 is embedded in the first sliding bushing 233, with a portion of the first ball bearing 234 projecting beyond the inner wall surface of the first sliding bushing 233 and bearing against the first inclined conical surface. Specifically, the first inclined conical surface comprises a first inclined conical surface 231A of the first stage and a first inclined conical surface 231B of the second stage, arranged sequentially in the axial direction of the first fixed sleeve 231. The first ball bearing 234 is comprised of two bearings, each of which is in contact with the first inclined conical surface 231A of the first stage and with the first inclined conical surface 231B of the second stage. The structural configuration with two inclined conical surfaces and two ball bearings enhances the locking reliability.

[0044] As in Fig. As shown in Figure 7, the first locking device further comprises a first limiting sleeve 235, which is fixedly fitted over the outer circumference of the first rotary sleeve 232 inside the front leg tube 221, wherein the first limiting sleeve 235 is arranged at the end of the first sliding bushing 233 near the support leg head end 210, and wherein a first elastic element 236 is provided between the first limiting sleeve 235 and the first sliding bushing 233. The first elastic element 236 serves to exert a first preload force on the first sliding bushing 233, thereby facilitating the return of the first sliding bushing 233 to its initial position.

[0045] As in Fig. As shown in Figure 7, the first locking device comprises a first fixed sleeve 231, a first rotary sleeve 232, and a first sliding bushing 233. The first fixed sleeve 231 is fixedly connected inside the middle leg tube 222, with one end extending into the front leg tube 221 and a first inclined conical surface formed on the outer wall of the first fixed sleeve 231. The first rotary sleeve 232 is coaxial with the first fixed sleeve 231 and is axially fixed relative to the first fixed sleeve 231 and rotatable relative to each other in the circumferential direction. The first rotary sleeve 232 is fitted over the outer circumference of the external transmission shaft 252 and is fixed relative to the external transmission shaft 252 in the circumferential direction.The first sliding bushing 233 is arranged inside the front leg tube 221 and is partially fitted over the outer circumference of the first fixed sleeve 231, wherein the first sliding bushing 233 is screwed to the outer circumference of the first rotating sleeve 232. When the external gear shaft 252 drives the first rotary sleeve 232 to a circumferential rotation, one end of the first sliding bushing 233 slides into a gap between the first fixed sleeve 231 and the front leg tube 221, pressing the first inclined conical surface of the first fixed sleeve 231 to allow locking of the front leg tube 221 and the middle leg tube 222, or the end of the first sliding bushing 233 slides out of the gap between the first fixed sleeve 231 and the front leg tube 221, releasing the first inclined conical surface of the first fixed sleeve 231 to allow unlocking of the front leg tube 221 and the middle leg tube 222.

[0046] As in Fig. As shown in Figure 8, the second locking device comprises a second fixed sleeve 241, a second rotary sleeve 242, and a second sliding bushing 243. The second fixed sleeve 241 is fixedly connected inside the rear leg tube 223, with one end extending into the middle leg tube 222 and a second inclined conical surface formed on the outer wall of the second fixed sleeve 241. The second rotary sleeve 242 is coaxial with the second fixed sleeve 241 and is axially fixed relative to the second fixed sleeve 241 and rotatable relative to each other in the circumferential direction. The second rotary sleeve 242 is fitted over the outer circumference of the external transmission shaft 252 and is fixed relative to the external transmission shaft 252 in the circumferential direction.The second sliding bushing 243 is arranged inside the middle leg tube 222 and is partially fitted over the outer circumference of the second fixed sleeve 241, with the second sliding bushing 243 being screwed to the outer circumference of the second rotating sleeve 242. When the external gear shaft 252 drives the second rotary sleeve 242 to a circumferential rotation, one end of the second sliding bushing 243 slides into a gap between the second fixed sleeve 241 and the middle leg tube 222, pressing the second inclined conical surface of the second fixed sleeve 241 to allow locking of the middle leg tube and the rear leg tube 223, or the end of the second sliding bushing 243 slides out of the gap between the second fixed sleeve 241 and the front leg tube 221, releasing the second inclined conical surface of the second fixed sleeve 241 to allow unlocking of the middle leg tube 222 and the rear leg tube 223.

[0047] As in Fig. As shown in Figure 8, a second ball bearing 244 is embedded in the second sliding bushing 243, with a portion of the second ball bearing 244 projecting beyond the inner wall surface of the second sliding bushing 243 and bearing against the second inclined conical surface. Specifically, the second inclined conical surface comprises a second inclined conical surface 241A of the first stage and a second inclined conical surface 241B of the second stage, arranged sequentially in the axial direction of the second fixed sleeve 241. The second ball bearing 244 is comprised of two bearings, each bearing contacting the second inclined conical surface 241A of the first stage and the second inclined conical surface 241B of the second stage. The structural configuration with two inclined conical surfaces and two ball bearings enhances the locking reliability.

[0048] As in Fig. As shown in Figure 8, the second locking device further comprises a second limiting sleeve 245, which is fixedly fitted over the outer circumference of the second rotary sleeve 242 inside the front leg tube 221, wherein the second limiting sleeve 245 is arranged at the end of the second sliding bushing 243 near the support leg head end 210, and wherein a second elastic element 246 is provided between the second limiting sleeve 245 and the second sliding bushing 243. The second elastic element 246 serves to exert a second preload force on the second sliding bushing 243, thereby facilitating the return of the second sliding bushing 243 to its initial position.

[0049] As in Fig. 4, Fig. 5 and Fig. As shown in Figure 9, protective sleeves 420 are fitted over the sections of the three pull cables 410 that project from the support leg head end 210. Each of the three pull cables 410 is guided through an inner channel of the corresponding protective sleeve 420. The pull cable 410 can be made of steel wire with a composition similar to that of brake cables. The protective sleeve 420 reduces friction as the pull cable 410 moves within its inner channel, thereby improving the responsiveness of the pull cable 410 during a pulling action. The protective sleeve 420 has a pipe connection at the end that is connected to the connecting bracket of the support leg head end 210. The mounting platform 100 has an internal annular cavity 101 that extends circumferentially around the connection 110.The three protective sleeves 420 extend from the lower opening of the mounting platform 100 into the annular cavity 101, the three protective sleeves 420 circling the annular cavity 101 before extending to the operating handle. The end of each of the three protective sleeves 420 furthest from the support leg head end 210 passes through an opening in the side wall of the mounting platform 100 and extends into the interior of the operating handle 300.

[0050] As in Fig. 1 and Fig. As shown in Figure 9, three leg connection brackets 120 are fixedly connected to the outer circumference of the mounting platform 100. The three support legs 200 are each hinged to the three leg connection brackets 120 on the outer circumference of the mounting platform 100.

[0051] As in Fig. 1 and Fig. 9, Fig. 10, Fig. 11 to Fig. As shown in Figure 12, the operating handle 300 comprises a handle shaft 310, a handle swivel sleeve 320, a handle sliding sleeve 330, a retaining pin 340, a handle joint 350, a handle connection base 360, and a handle locking knob 370. The handle joint 350 is rigidly connected to the outer circumference of the mounting platform 100. The handle joint 350 has an internal cavity. Three pull cables 410, extending from inside the three protective sleeves 420, run through the interior of the handle joint 350 and extend into the movement space 311 of the handle shaft 310. The handle connection base 360 ​​is fixedly connected to the end of the handle shaft 310 near the handle joint 350, the handle connection base 360 ​​being pivotably connected to the handle joint 350 about a hinge axis, and the hinge axis being connected to a handle locking knob 370 to lock the handle connection base 360 ​​and the handle joint 350.The handle locking knob 370 is used to adjust the angle of the operating handle 300.

[0052] As in Fig. 1 and Fig. 9, Fig. 10, Fig. 11 to Fig. As shown in Figure 12, one end of the handle shaft 310 is fixedly connected to the handle connection base 360, with a movement space 311 provided within the handle shaft 310. The handle shaft 310 is provided with a through slot 312 that extends radially through the handle shaft 310 and along its own axial direction. The handle swivel sleeve 320 is arranged to fit over the outer circumference of the handle shaft 310 and is axially fixed relative to the handle shaft 310 and rotatable relative to each other in the circumferential direction. The handle sliding sleeve 330 is arranged to fit over the outer circumference of the handle shaft 310 so as to be slidably displaceable in the axial direction of the handle shaft 310 and is screwed to the inner wall of the handle swivel sleeve 320.The retaining pin 340 is fixedly connected to the handle sliding sleeve 330 and axially displaceably connected to the through slot 312 along the handle shaft 310, with three pull cables 410 being fixedly connected to the retaining pin 340 through the movement space 311 of the handle shaft 310. The retaining pin 340 is provided with three through-holes through which the pull cables 410 are guided, the pull cable 410 being connected to a limiting end of the pull cable 410, which has a larger outer diameter than the through-hole and abuts the retaining pin 340 to ensure position limitation. The handle shaft 310 and the handle swivel sleeve 320 form the stationary part of the operating handle 300, while the handle sliding sleeve 330 and the retaining pin 340 form the moving part of the operating handle 300.

[0053] As in Fig. 9, Fig. 10, Fig. 11 to Fig.As shown in Figure 12, the outer wall of the handle shaft 310 is provided with a pair of outwardly projecting limiting ribs 313, wherein the longitudinal direction of the pair of limiting ribs 313 extends along the axial direction of the handle shaft 310, and the inner wall of the handle sliding sleeve 330 is provided with a limiting recess which slidably engages with the limiting rib 313.

[0054] In summary, the tripod provided by the present invention features one end of the pull cable 410 connected to the gear unit of the support leg 200. When the pull cable 410 is pulled, it drives the leg tube locking device via the gear unit and the gear shaft assembly, locking or unlocking the multiple leg tubes of the leg tube assembly 220. Simultaneously, the other end of the pull cable 410, which is connected to three support legs 200 at a time, is connected to the operating handle 300. When the operating handle 300 is actuated, it simultaneously exerts a pulling force on at least three pull cables 410, thereby locking or unlocking three support legs 200 at the same time.This allows the unlocking and locking of three 200 mm support legs with a single button press, simplifying operation and effectively increasing the adjustment speed for extending and retracting the 200 mm support legs. Compared to existing one-button operation tripods with an electrically controlled 300 mm operating handle, this design requires no charging and eliminates the need to carry additional equipment such as chargers or power banks, thus offering superior mobility. Unlike existing one-button operation tripods with a hydraulically driven handle, it allows for instant locking without any locking delay. In the gear unit, the larger tooth spacing of the first 2651 mm rack relative to the second 2652 mm rack enables a higher gear ratio.Consequently, with a constant locking force of the locking device, a comparatively smaller force on the operating handle 300 is sufficient to enable unlocking, thus saving effort. When the operating handle 300 is turned into the unlocked position, the torsion spring 269 and the return spring 266 are released, allowing immediate rotation of the gear shaft assembly. This, in turn, immediately drives the leg tube locking device to lock the multiple leg tubes without any perceptible delay in locking.

[0055] It is clear that the foregoing embodiments are merely illustrative and do not limit the possible embodiments. The person skilled in the art can conceive of other variations or modifications in various forms based on the above description. There is neither the need nor the possibility to exhaust all embodiments here. The obvious modifications or variations thus derived remain within the scope of the invention.

Claims

[1] One-button operation tripod comprising a mounting platform (100), at least three support legs (200) each connected at one end to the mounting platform (100), and an operating handle (300) connected to the mounting platform (100); characterized by , that each of the support legs (200) comprises the following: a support leg head end (210), one end of which is connected to the mounting platform (100); a leg tube assembly (220) comprising several leg tubes arranged sequentially from the outside to the inside and axially extendable and retractable, wherein one end of the outermost leg tube is fixedly connected to the support leg head end (210); a leg tube locking device located inside the support leg (200) and used to lock or unlock the multiple leg tubes; a transmission shaft assembly which is arranged on the support leg (200) and rotatable about its own axis, wherein the transmission shaft assembly is connected to the leg tube locking device in a transmission manner; a gearbox unit which is attached to the support leg head end (210) and whose power output end is connected to the gearbox shaft assembly in terms of transmission technology; a pull cable (410) connected to the power receiving end of the gear unit, wherein the pull cable (410) places the leg tube locking device in a locked or unlocked state via the gear unit and the gear shaft assembly, the at least three pull cables (410) extending beyond the support leg head end (210) are each connected to the operating handle (300), while the operating handle (300) serves to simultaneously exert a pulling force on the at least three pull cables (410). [2] Tripod for one-button operation according to claim 1, characterized by , that the gear unit is mounted within the support leg head end (210), the gear unit comprising the following: a rotating shaft (261) which is connected to the support leg head end (210) and is rotatably mounted about its own axis; a swivel arm (262) which is fixedly connected at one end to the rotating shaft (261) and at the other end to the pull cable (410); a first gear (263) which is fitted over the rotating shaft (261) and is firmly connected to it and rotates synchronously with the swivel arm (262); a second gear (264) which is connected to the support leg head end (210) and is rigidly coaxially connected to the transmission shaft assembly, wherein the second gear (264) is transmissionally connected to the first gear (263), wherein When the pull cable (410) is actuated, it drives the swivel arm (262), the rotary shaft (261) and the first gear (263) to rotate axially around the rotary shaft (261), and the first gear (263) drives the second gear (264) and the transmission shaft assembly to each rotate axially around their own axis. [3] Tripod for one-button operation according to claim 2, characterized by , that the gear unit further comprises a right-angled double-sided rack (265) which is transmissionally connected between the first gear (263) and the second gear (264), wherein the right-angled double-sided rack (265) comprises a first rack (2651) and a second rack (2652) with mutually perpendicular tooth surfaces, wherein the first rack (2651) meshes with the first gear (263) and the second rack (2652) meshes with the second gear (264). [4] Tripod for one-button operation according to claim 3, characterized by, that the tooth spacing of the first rack (2651) is greater than that of the second rack (2652). [5] Tripod for one-button operation according to claim 3, characterized by , that the underside of the support leg head end (210) is provided with a linear sliding groove (212), wherein the guide direction of the linear sliding groove (212) runs parallel to the longitudinal direction of the first rack (2651), wherein the right-angled double-sided rack (265) comprises a rack slide (2653) which is slidably connected to the linear sliding groove (212) along the guide direction of the linear sliding groove (212). [6] Tripod for one-button operation according to claim 5, characterized by, that a return spring (266) is provided in the linear sliding groove (212), wherein, when the pivot arm (262) is rotated due to the pulling actuation by the pull cable (410), the return spring (266) is compressed by the rack slide (2653) and stores an elastic potential energy. [7] Tripod for one-button operation according to claim 5, characterized by , that the linear sliding groove (212) has a guide rod (267) which is fixedly connected to the support leg head end (210), wherein the axial direction of the guide rod (267) is parallel to the longitudinal direction of the first rack (2651) and the rack slide (2653) is arranged slipped over the outer circumference of the guide rod (267) and is slidably connected to the guide rod (267). [8] Tripod for one-button operation according to claim 2, characterized by, that a lateral mounting bracket (211) is fixedly connected to the inner wall of the support leg head end (210), wherein one end of the pivot shaft (261) is connected to the lateral mounting bracket (211), the lateral mounting bracket (211) has an arcuate limiting groove (211A), and the center point of the arcuate limiting groove (211A) lies on the axis of the pivot shaft (261), wherein a guide shaft (268) is fixedly arranged at the end of the swivel arm (262) connected to the pull cable (410), the axial direction of the guide shaft (268) is parallel to that of the pivot shaft (261), and one end of the guide shaft (268) extends into the arcuate limiting groove (211A). [9] Tripod for one-button operation according to claim 8, characterized by, that the gear unit further comprises a torsion spring (269) which is arranged fitted over the outer circumference of the rotating shaft (261), wherein the torsion spring (269) is arranged between the pivot arm (262) and the lateral mounting bracket (211), while one end of the torsion spring (269) is connected to the lateral mounting bracket (211) and the other end to the pivot arm (262), wherein when the pivot arm (262) is rotated due to a pulling actuation by the pull cable (410), the torsion spring (269) is twisted and stores elastic potential energy. [10] Tripod for one-button operation according to claim 1, characterized by, that the mounting platform (100) comprises a centrally arranged connection (110) for mounting a photographic equipment and an annular cavity (101) which is formed circumferentially around the connection (110) in the mounting platform (100), wherein the annular cavity (101) is surrounded internally by several protective sleeves (420), wherein one end of the several protective sleeves (420) each projects through the mounting platform (100) and is connected to the operating handle (300), the other end of the several protective sleeves (420) each projects through the mounting platform (100) and is connected to the several support leg head ends (210), and the several pull cables (410) each pass through an inner channel of the several protective sleeves (420). [11] Tripod for one-button operation according to claim 1, characterized by, that the leg tube assembly (220) comprises a front leg tube (221), a middle leg tube (222) and a rear leg tube (223) arranged sequentially from the outside inwards and axially extendable and retractable, wherein the front leg tube (221), the middle leg tube (222) and the rear leg tube (223) remain fixed relative to each other in the circumferential direction, wherein the leg tube locking device comprises a first locking device arranged between the front leg tube (221) and the middle leg tube (222), and a second locking device arranged between the middle leg tube (222) and the rear leg tube (223), wherein the transmission shaft assembly comprises an internal transmission shaft (251) which is fixedly connected at one end to the power output end of the transmission unit, and an external transmission shaft (252) which is fitted over the outer circumference of the internal transmission shaft (251) and is fixed relative to each other in the circumferential direction relative to the internal transmission shaft (251) and is arranged to slide axially relative to each other, while the external transmission shaft (252) can be connected to the first locking device via operation in order to releasably prevent movement of the middle leg tube (222) relative to the front leg tube (221), and the external transmission shaft (252) can be connected to the second locking device via operation in order to releasably prevent movement of the rear leg tube (223) relative to the middle leg tube (222). [12] Tripod for one-button operation according to claim 11, characterized by , that the first locking device comprises the following: a first fixed sleeve (231) which is fixedly connected to the middle leg tube (222), wherein one end extends into the front leg tube (221) and a first inclined conical surface is formed on the outer wall of the first fixed sleeve (231); a first rotary sleeve (232) which is arranged coaxially to the first fixed sleeve (231) and axially relative to the first fixed sleeve (231) and rotatably relative to each other in the circumferential direction, while the first rotary sleeve (232) is placed over the outer circumference of the external transmission shaft (252) and is arranged relative to each other in the circumferential direction; a first sliding bushing (233) which is arranged inside the front leg tube (221) and is arranged at least partially slipped over the outer circumference of the first fixed sleeve (231), wherein the first sliding bushing (233) is screwed to the outer circumference of the first rotating sleeve (232), wherein, when the external transmission shaft (252) drives the first rotary sleeve (232) to a circumferential rotation, one end of the first sliding bushing (233) slides into a gap between the first fixed sleeve (231) and the front leg tube (221), pressing the first inclined conical surface of the first fixed sleeve (231) to allow locking of the front leg tube (221) and the middle leg tube (222), or the end of the first sliding bushing (233) slides out of the gap between the first fixed sleeve (231) and the front leg tube (221), releasing the first inclined conical surface of the first fixed sleeve (231) to allow unlocking of the front leg tube (221) and the middle leg tube (222). [13] Tripod for one-button operation according to claim 12, characterized by, that a first ball bearing (234) is embedded in the first sliding bushing (233), wherein a part of the first ball bearing (234) projects beyond the inner wall surface of the first sliding bushing (233) and rests against the first inclined conical surface. [14] Tripod for one-button operation according to claim 13, characterized by , that the first inclined conical surface comprises a first inclined conical surface of the first stage (231A) and a first inclined conical surface of the second stage (231B) arranged successively in the axial direction of the first fixed sleeve (231), wherein the first ball bearings (234) are two, the two first ball bearings (234) being in contact with the first inclined conical surface (231A) of the first stage and with the first inclined conical surface (231B) of the second stage. [15] Tripod for one-button operation according to claim 12, characterized by, that the first locking device further comprises a first limiting sleeve (235) which is arranged within the front leg tube (221) firmly fitted over the outer circumference of the first rotary sleeve (232), wherein the first limiting sleeve (235) is arranged at the end of the first sliding bushing (233) near the support leg head end (210) and wherein a first elastic element (236) is provided between the first limiting sleeve (235) and the first sliding bushing (233). [16] Tripod for one-button operation according to claim 12, characterized by that the structure of the second locking device is identical to that of the first locking device. [17] Tripod for one-button operation according to one of claims 1 to 16, characterized by, that the operating handle (300) comprises an operating section connected to the mounting platform (100) and a movement section driven by the operating section, wherein at least three of the pull cables (410) extend beyond the support leg head end (210) and are each connected to the movement section. [18] Tripod for one-button operation according to claim 17, characterized by , that the operating section includes the following: a handle shaft (310) of which one end is connected to the mounting platform (100), wherein the handle shaft (310) has an internal movement space (311), the handle shaft (310) is provided with a through slot (312) which extends radially through the handle shaft (310) and along its own axial direction; a handle swivel sleeve (320) which is fitted over the outer circumference of the handle shaft (310) and is axially fixed relative to the handle shaft (310) and rotatably arranged in the circumferential direction relative to each other, the movement section includes the following: a handle sliding sleeve (330) which is arranged to be displaceable in the axial direction of the handle shaft (310) over the outer circumference of the handle shaft (310) and is screwed to the inner wall of the handle rotating sleeve (320); a retaining pin (340) which is fixedly connected to the handle sliding sleeve (330) and axially slidably connected to the through slot (312) along the handle shaft (310), wherein the several pull cables (410) are fixedly connected to the retaining pin (340) through the interior of the handle shaft (310). [19] Tripod for one-button operation according to claim 18, characterized by, that the retaining pin (340) is provided with several through-holes through which the pull cables (410) are passed, wherein the pull cable (410) is connected to a limiting head end of the pull cable (410) which has a larger outer diameter than the through-hole and abuts the retaining pin (340) to ensure position limitation. [20] Tripod for one-button operation according to claim 19, characterized by , that the outer wall of the handle shaft (310) is provided with an outwardly projecting limiting rib (313), wherein the longitudinal direction of the limiting rib (313) extends along the axial direction of the handle shaft (310), and the inner wall of the handle sliding sleeve (330) is provided with a limiting recess which slidably engages with the limiting rib (313). [21] Tripod for one-button operation according to claim 19, characterized by, that a handle joint (350) is fixedly connected to the outer circumference of the mounting platform (100), wherein the operating handle (300) comprises a handle connection base (360) which is fixedly connected to the end of the handle shaft (310) near the handle joint (350), wherein the handle connection base (360) is pivotably connected to the handle joint (350) about a hinge axis and wherein the hinge axis is connected to a handle locking knob (370) to lock the handle connection base (360) and the handle joint (350).

Images