One-key operation type supporting foot stool

Abstract

The invention discloses a one-key operation type supporting foot stool which comprises an installation platform, a plurality of supporting legs and an operation handle. Each supporting leg comprises a supporting leg head end seat, a plurality of sections of leg pipes capable of axially stretching out and drawing back from outside to inside, a leg pipe locking assembly used for locking or unlocking the plurality of sections of leg pipes, a transmission shaft assembly capable of rotating around the axial direction of the leg pipe locking assembly, and a gear transmission assembly mounted on the supporting leg head end seat; the transmission shaft assembly is in transmission connection between the power output end of the gear transmission assembly and the leg tube locking assembly; the operation handle is connected with a plurality of pull wires, and the pull wires are connected to the power input ends of the gear transmission assemblies of the different supporting legs respectively. And the operating handle is used for simultaneously applying traction force to the three traction lines. The operation handle can apply traction force to the three traction lines at the same time, the three supporting legs can be locked or unlocked at the same time, one-key release and one-key fixation of the three supporting legs can be achieved, and the device has the advantages of being easy to operate, high in telescopic adjusting speed and capable of achieving instant locking.

Description

Technical Field

[0001] This invention relates to the field of photographic auxiliary equipment technology, specifically to a one-button operation support tripod. Background Technology

[0002] A photography tripod mainly consists of a mounting platform and three support legs connected to the mounting platform at one end. The mounting platform is used to mount photography equipment such as cameras. Each support leg assembly includes multiple telescopic support leg tubes. There is a locking mechanism between two adjacent support leg tubes. Each locking mechanism has an independent locking / unlocking switch. Both sets of locking / unlocking switches need to be opened to unfold all the support leg tubes on that support leg assembly. To unfold the entire tripod, six locking / unlocking switches need to be opened, which is extremely inconvenient to use.

[0003] To solve the problem of cumbersome locking / unlocking operations in traditional support legs, a control handle is installed on the support leg mounting platform. Users can use the control handle to control the locking and unlocking of the telescopic adjustment function of the three support leg components with one button. In the locked state, all three support leg components cannot be extended or retracted; in the unlocked state, users can operate the extension and retraction of the support leg components to adjust their support height.

[0004] In some one-click locking support legs, the control handle is a hydraulically driven handle, which contains a hydraulic cylinder. The support leg assembly contains a piston cylinder and a piston rod. The locking mechanism between two adjacent support leg tubes is fixedly connected to the piston rod. The hydraulic cylinder supplies hydraulic oil to the piston cylinders inside the three support leg assemblies through multiple oil pipes. The piston rod drives the locking mechanism to move, thereby locking / unlocking between two adjacent support leg tubes.

[0005] However, in this type of hydraulically driven locking support leg, because the hydraulic oil needs a certain amount of time to flow in the oil pipe, adjacent support leg sections cannot be locked instantly, resulting in a locking delay, which needs to be improved. Summary of the Invention

[0006] Therefore, the technical problem to be solved by the present invention is to overcome the defect that the hydraulic drive of the support leg locking method can not lock instantly and affects the user experience, so as to provide a one-button operation support leg.

[0007] To solve the above-mentioned technical problems, the technical solution of the present invention is as follows:

[0008] A one-button operation support leg includes a mounting platform, at least three support legs connected at one end to the mounting platform, and an operating handle connected to the mounting platform; each support leg includes: The outrigger head seat is connected at one end to the mounting platform; The leg tube assembly includes multiple leg tubes arranged sequentially from the outside to the inside and capable of axial extension and retraction, with one end of the outermost leg tube fixedly connected to the leg head seat; A leg tube locking assembly is located inside the support leg and is used to lock or unlock multiple sections of the leg tube; A drive shaft assembly is located on the support leg and is rotatable about its own axis; the drive shaft assembly is drively connected to the leg tube locking assembly. A gear transmission assembly is installed on the head end seat of the outrigger, and its power output end is connected to the transmission shaft assembly for transmission. The traction cable is connected to the power input end of the gear transmission assembly; the traction cable drives the leg tube locking assembly to be in a locked or unlocked state through the gear transmission assembly and the transmission shaft assembly. At least three of the traction lines extend from the outrigger head and are connected to the operating handle, which is used to apply traction force to the at least three traction lines simultaneously.

[0009] Furthermore, the gear transmission assembly is installed inside the outrigger head end seat; the gear transmission assembly includes; A rotating shaft is connected to the support leg head seat and is rotatable about its own axis; The swing arm is fixedly connected at one end to the rotating shaft and at the other end to the traction line; The first gear is fixedly sleeved and connected to the rotating shaft, and rotates synchronously with the rotation of the swing arm; The second gear is connected to the support leg head seat and is coaxially and fixedly connected to the drive shaft assembly; the second gear is drively connected to the first gear. When the traction line is pulled, it causes the swing arm, the rotating shaft and the first gear to rotate around the axial direction of the rotating shaft. The first gear drives the second gear and the transmission shaft assembly to rotate around its own axial direction.

[0010] Furthermore, the gear transmission assembly also includes a right-angled double-sided rack that is connected between the first gear and the second gear. The right-angled double-sided rack includes a first rack and a second rack with mutually perpendicular tooth surfaces. The first rack meshes with the first gear, and the second rack meshes with the second gear.

[0011] Furthermore, the pitch of the first rack is greater than the pitch of the second rack.

[0012] Furthermore, the bottom of the support leg head seat is provided with a straight slide groove, the guide direction of the straight slide groove is parallel to the length direction of the first rack, and the right-angle double-sided rack includes a rack slider that is slidably connected to the straight slide groove along the guide direction of the straight slide groove.

[0013] Furthermore, a return spring is provided in the linear slide groove. When the swing arm is pulled and rotated by the traction line, the return spring is compressed by the rack and pinion slider and accumulates elastic potential energy.

[0014] Furthermore, the linear slide groove is provided with a guide rod fixedly connected to the support leg head seat. The axial direction of the guide rod is parallel to the length direction of the first rack. The rack slider is sleeved on the outer periphery of the guide rod and slidably connected to the guide rod.

[0015] Furthermore, a side mounting base is fixedly connected to the inner side wall of the outrigger head seat, one end of the rotating shaft is connected to the side mounting base, the side mounting base is provided with an arc-shaped limiting groove, the center of the arc-shaped limiting groove is located on the axis of the rotating shaft; a guide shaft is fixed to one end of the swing arm connected to the traction line, the axis of the guide shaft is parallel to the axis of the rotating shaft, and one end of the guide shaft extends into the arc-shaped limiting groove.

[0016] Furthermore, the gear transmission assembly also includes a torsion spring sleeved on the outer periphery of the rotating shaft. The torsion spring is located between the swing arm and the side mounting base, with one end of the torsion spring connected to the side mounting base and the other end connected to the swing arm. When the swing arm is pulled and rotated by the traction line, the torsion spring is torsiond and accumulates elastic potential energy.

[0017] Furthermore, the mounting platform is provided with a centrally located connector for mounting photographic equipment, and the interior of the mounting platform is provided with an annular cavity surrounding the connector. Multiple protective sleeves are arranged around the annular cavity, one end of each of the multiple protective sleeves extends out of the mounting platform and is connected to the operating handle, and the other end of each of the multiple protective sleeves extends out of the mounting platform and is respectively connected to multiple support leg end seats. Multiple traction cables are routed through the internal channels of the multiple protective sleeves.

[0018] Furthermore, the leg tube assembly includes a front leg tube, a middle leg tube, and a rear leg tube arranged sequentially from the outside to the inside and capable of axial extension and retraction, wherein the front leg tube, the middle leg tube, and the rear leg tube remain relatively circumferentially fixed; The leg tube locking assembly includes a first locking assembly installed between the front leg tube and the middle leg tube, and a second locking assembly installed between the middle leg tube and the rear leg tube; The drive shaft assembly includes an inner drive shaft with one end fixedly connected to the power output end of the gear transmission assembly, and an outer drive shaft sleeved on the outer periphery of the inner drive shaft and kept relatively circumferentially fixed and relatively axially sliding with respect to the inner drive shaft; the outer drive shaft is operably connected to a first locking assembly to releasably prevent movement of the middle leg tube relative to the front leg tube, and the outer drive shaft is operably connected to a second locking assembly to releasably prevent movement of the rear leg tube relative to the middle leg tube.

[0019] Further, the first locking component includes: The first fixing sleeve is fixedly connected to the middle leg tube, and one end extends into the front leg tube; the outer wall of the first fixing sleeve is provided with a first inclined conical surface; The first rotating sleeve is coaxially arranged with the first fixed sleeve and is axially fixed and circumferentially rotatable relative to the first fixed sleeve; the first rotating sleeve is sleeved on the outer circumference of the outer drive shaft and is circumferentially fixed relative to the outer drive shaft; The first sliding sleeve is located inside the front leg tube and is at least partially sleeved on the outer periphery of the first fixed sleeve. The first sliding sleeve is threadedly connected to the outer periphery of the first rotating sleeve. When the external drive shaft drives the first rotating sleeve to rotate circumferentially, one end of the first sliding sleeve slides into the gap between the first fixed sleeve and the front leg tube and presses the first inclined conical surface of the first fixed sleeve to lock the front leg tube and the middle leg tube, or one end of the first sliding sleeve slides out of the gap between the first fixed sleeve and the front leg tube and releases the first inclined conical surface of the first fixed sleeve to unlock the front leg tube and the middle leg tube.

[0020] Furthermore, a first ball is embedded inside the first sliding sleeve, and a portion of the first ball protrudes from the inner wall surface of the first sliding sleeve and abuts against the first inclined conical surface.

[0021] Furthermore, the first inclined conical surface includes a first-stage first inclined conical surface and a second-stage first inclined conical surface arranged sequentially along the axial direction of the first fixed sleeve; there are two first balls, and the two first balls respectively contact the first-stage first inclined conical surface and the second-stage first inclined conical surface.

[0022] Furthermore, the first locking assembly also includes a first limiting sleeve located inside the front leg tube and sleeved and fixed on the outer periphery of the first rotating sleeve. The first limiting sleeve is located at one end of the first sliding sleeve near the support leg head seat, and a first elastic element is provided between the first limiting sleeve and the first sliding sleeve.

[0023] Furthermore, the structure of the second locking component is the same as that of the first locking component.

[0024] Furthermore, the operating handle includes an operating part connected to the mounting platform and a moving part driven by the operating part, and at least three traction cables extend from the outrigger head end and are all connected to the moving part.

[0025] Furthermore, the operation section includes: A handle shaft, one end of which is connected to the mounting platform, has a movable cavity inside the handle shaft, and a through groove that radially penetrates the handle shaft and extends along its own axial direction. A handle rotating sleeve is fitted around the outer circumference of the handle shaft and is fixed in the axial direction and rotates in the circumferential direction relative to the handle shaft. The moving part includes: A handle sliding sleeve is slidably sleeved on the outer periphery of the handle shaft along the axial direction of the handle shaft and threadedly connected to the inner wall of the handle rotating sleeve; A fixing pin is fixedly connected to the handle sliding sleeve and slidably connected to the through groove along the axial direction of the handle shaft; multiple traction lines are fixedly connected to the fixing pin through the inner cavity of the handle shaft.

[0026] Furthermore, the fixing pin is provided with a plurality of threading holes for the traction wire to pass through, and the traction wire is connected to a traction wire limiting end with an outer diameter larger than the threading holes and abutting against the limiting position of the fixing pin.

[0027] Furthermore, the outer wall of the handle shaft is provided with a protruding limiting rib, the length direction of which extends along the axial direction of the handle shaft, and the inner wall of the handle sliding sleeve is provided with a limiting groove that slides with the limiting rib.

[0028] Furthermore, a handle hinge joint is fixedly connected to the outer periphery of the installation platform. The operating handle includes a handle connecting seat fixedly connected to one end of the handle shaft near the handle hinge joint. The handle connecting seat is rotatably connected to the handle hinge joint about a hinge shaft. The hinge shaft is connected to a handle locking knob for locking the handle connecting seat and the handle hinge joint.

[0029] The one-button operation support leg provided by this invention has the following advantages: one end of the traction cable is connected to the gear transmission assembly of the support leg, and when the traction cable is pulled, it can drive the leg tube locking assembly to lock or release the multi-section leg tubes through the gear transmission assembly and the transmission shaft assembly. Simultaneously, the other ends of the traction cables connected to at least three support legs are all connected to the operating handle. When the operating handle is operated, it can simultaneously apply traction force to at least three traction cables, thereby enabling the simultaneous locking or unlocking of at least three support legs. This allows for one-button release and one-button fixing of multiple support legs, simplifying operation and effectively improving the speed of support leg extension and retraction adjustment. Compared with existing one-button operation support legs using electronically controlled operating handles, it does not require charging and eliminates the need to carry additional chargers, power banks, or other equipment, resulting in better portability. Compared with existing one-button operation support legs using hydraulically driven handles, it achieves instant locking without any locking delay. In the gear transmission assembly, because the tooth pitch of the first rack is greater than that of the second rack, the transmission ratio can be increased. With a fixed locking force in the locking assembly, a relatively smaller force is required to unlock the mechanism, achieving a labor-saving effect. When the operating handle is rotated to the unlocked state, the torsion spring and return spring are released, instantly driving the transmission shaft assembly to rotate, which in turn instantly drives the leg tube locking assembly to lock the multi-section leg tubes, without any noticeable locking delay. Attached Figure Description

[0030] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0031] Figure 1 This is a three-dimensional structural diagram of the one-button operation support frame in an embodiment of the present invention; Figure 2 This is a three-dimensional structural diagram of the support leg in an embodiment of the present invention; Figure 3 This is a cross-sectional view of the support leg in an embodiment of the present invention; Figure 4 for Figure 3 Enlarged view of point A in the middle; Figure 5 This is a three-dimensional structural diagram of the gear transmission assembly in an embodiment of the present invention; Figure 6 This is a schematic diagram of the internal structure of the gear transmission assembly in the support leg head end seat in an embodiment of the present invention; Figure 7 for Figure 3 Enlarged view of point B in the middle; Figure 8 for Figure 3 Enlarged view of point C in the middle; Figure 9 This is a schematic diagram showing the connection relationship between the mounting platform, support legs, operating handle, and protective sleeve in an embodiment of the present invention; Figure 10 This is a three-dimensional structural diagram of the operating handle in an embodiment of the present invention; Figure 11 This is a cross-sectional view of the operating handle in an embodiment of the present invention; Figure 12 This is a schematic diagram showing the connection relationship between the handle shaft and the fixing pin in an embodiment of the present invention.

[0032] Explanation of reference numerals in the attached drawings: 100, mounting platform; 101, annular cavity; 110, connector; 120, leg connector; 200. Supporting leg; 210. Outrigger head seat; 211. Side mounting seat; 211A. Arc-shaped limiting groove; 212. Linear slide groove; 213. Bearing; 220. Leg tube assembly; 221. Front leg tube; 222. Middle leg tube; 223. Rear leg tube; 231. First fixed sleeve; 231A. First-stage first inclined conical surface; 231B. Second-stage first inclined conical surface; 232. First rotating sleeve; 233. First sliding sleeve; 234. First ball bearing; 235. First limiting sleeve; 236. First elastic element; 241. Second fixed sleeve; 241A. First-stage second inclined conical surface; 241B. Second-stage second inclined conical surface; 242. Second rotating sleeve; 243. Second sliding sleeve; 244. Second ball bearing; 245. Second limiting sleeve; 246. Second elastic element; 251. Inner drive shaft; 252. Outer drive shaft; 261. Rotating shaft; 262. Swing arm; 263. First gear; 264. Second gear; 265. Right-angle double-sided rack; 2651. First rack; 2652. Second rack; 2653. Rack slider; 266. Return spring; 267. Guide rod; 268. Guide shaft; 269. Torsion spring; 300. Operating handle; 310. Handle shaft; 311. Movable cavity; 312. Through groove; 313. Limiting rib; 320. Handle rotating sleeve; 330. Handle sliding sleeve; 340. Fixing pin; 350. Handle hinge joint; 360. Handle connecting seat; 370. Handle locking knob; 410. Traction line; 420. Protective sleeve. Detailed Implementation

[0033] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0035] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" 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 invention based on the specific circumstances.

[0036] like Figure 1 The illustrated one-button operation tripod includes a mounting platform, three support legs hinged to the mounting platform at one end, and an operating handle connected to the mounting platform. The mounting platform has a connector for mounting photographic equipment at its center. The three support legs are connected to the outer periphery of the mounting platform and are evenly spaced along its circumference. The operating handle is also connected to the outer periphery of the mounting platform and can be gripped for operation. It is understood that the number of support legs is not limited to three; there can be three or more.

[0037] like Figure 1 and Figure 2As shown, the support leg 200 includes a leg head end seat 210 and a leg tube assembly 220. One end of the leg head end seat 210 is hinged to the mounting platform 100. The leg tube assembly 220 includes 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 relatively circumferentially fixed and relatively axially sliding, as are the middle leg tube 222 and the rear leg tube 223. One end of the front leg tube 221 is fixedly connected to the leg head end seat 210. The specific structure of the front leg tube 221, the middle leg tube 222, and the rear leg tube 223 maintaining a relatively circumferentially fixed and relatively axially sliding arrangement is prior art and not the core inventive point of this application, and will not be elaborated here. It is also understood that the number of leg tubes included in the leg tube assembly 220 is not limited to three; it can also include two, four, or more.

[0038] like Figure 2 , Figure 3 and Figure 4 As shown, the support leg 200 also includes a leg tube locking assembly and a drive shaft assembly located within the support leg 200. The leg tube locking assembly is used to lock or unlock the front leg tube 221, the middle leg tube 222, and the rear leg tube 223. The drive shaft assembly is located on the support leg 200 and rotatably arranged about its own axis, and is drively connected to the leg tube locking assembly. Specifically, the leg tube locking assembly includes a first locking component for locking or unlocking the front leg tube 221 and the middle leg tube 222, and a second locking component for locking or unlocking the middle leg tube 222 and the rear leg tube 223. The drive shaft assembly includes an inner drive shaft 251 and an outer drive shaft 252, which are coaxially arranged and axially extendable. One end of the inner drive shaft 251 is fixedly connected to the interior of the outrigger head seat 210 and is rotatable about its own axis. The other end of the inner drive shaft 251 extends into the interior of the front leg tube 221. The outer drive shaft 252 is sleeved on the outer periphery of the inner drive shaft 251 and is circumferentially fixed relative to the inner drive shaft 251. When the inner drive shaft 251 rotates, the outer drive shaft 252 rotates synchronously with the inner drive shaft 251. The outer drive shaft 252 is operably connected to a first locking assembly to releasably prevent the movement of the middle leg tube 222 relative to the front leg tube 221; and the outer drive shaft 252 is operably connected to a second locking assembly to releasably prevent the movement of the rear leg tube 223 relative to the middle leg tube 222.

[0039] like Figure 3 , Figure 4 and Figure 5As shown, the support leg 200 also includes a gear transmission assembly located within the support leg head seat 210. The gear transmission assembly includes a power input end and a power output end, with the power output end fixedly connected to one end of the inner drive shaft 251. The power input end of the gear transmission assembly is connected to a traction cable 410, the other end of which is connected to an operating handle 300. The three traction cables 410 connected to the three support legs 200 extend out of the support leg head seat 210 and are all connected to the operating handle 300. The operating handle 300 can simultaneously apply traction force to the three traction cables 410. When the operating handle 300 is operated to apply traction force to the traction cables 410, the traction cables 410 can pull the power input end of the gear transmission assembly to move, thereby causing the power output end of the gear transmission assembly to drive the inner drive shaft 251 and the outer drive shaft 252 to rotate around their own axial direction. When both the first and second locking components are locked, the traction line 410 drives the outer drive shaft 252 to rotate around its own axis. When the outer drive shaft 252 rotates, it drives the first and second locking components to switch to the unlocked state simultaneously. At this time, the front leg tube 221, the middle leg tube 222, and the rear leg tube 223 are unlocked, and the extension length of the support leg 200 can be adjusted by sliding the multi-section leg tubes. When the length of the support leg 200 is adjusted to the correct position, the operating handle 300 is moved in the opposite direction, the traction line 410 is reset, and the outer drive shaft 252 rotates in the locking direction. When the outer drive shaft 252 rotates, it drives the first and second locking components to return to the locked state simultaneously. In this way, multiple locking components between the multiple sections of the support leg 200 can be quickly locked or unlocked at one time, which is quite convenient.

[0040] like Figure 3 , Figure 4 and Figure 5As shown, the gear transmission assembly is entirely located inside the outrigger head seat 210. The gear transmission assembly includes a rotating shaft 261, a swing 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. A side mounting seat 211 is fixedly connected to the inner wall of the outrigger head seat 210. The rotating shaft 261 connects one inner wall of the outrigger head seat 210 and the side mounting seat 211, and is rotatable about its own axial direction. One end of the swing arm 262 is fixedly connected to the rotating shaft 261, and the other end of the swing arm 262 has a fixing hole for fixing the traction line 410. The first gear 263 is fixedly sleeved and connected to the rotating shaft 261, and rotates synchronously with the rotation of the swing arm 262. The second gear 264 is connected to the outrigger head end seat 210 and is coaxially and fixedly connected to the drive shaft assembly; the second gear 264 meshes with the first gear 263 for transmission. The inner drive shaft 251 is rotatably connected to the bottom of the outrigger head end seat 210 via a bearing 213 around its own axis, and the second gear 264 is fixedly connected to the inner drive shaft 251. It can be understood that the first gear 263 and the second gear 264 can directly mesh for transmission, or they can achieve indirect meshing transmission through an intermediate gear component. When the traction line 410 is pulled, it drives the swing arm 262, the rotating shaft 261, and the first gear 263 to rotate around the axis of the rotating shaft 261. The first gear 263 drives the second gear 264 and the inner drive shaft 251 to rotate around their own axis.

[0041] like Figure 4 , Figure 5 and Figure 6 As shown, the gear transmission assembly also includes a right-angled double-sided rack 265 connected between the first gear 263 and the second gear 264. The right-angled double-sided rack 265 includes a first rack 2651 and a second rack 2652 with mutually perpendicular tooth surfaces. The first rack 2651 meshes with the first gear 263, and the second rack 2652 meshes with the second gear 264; and the tooth pitch of the first rack 2651 is greater than the tooth pitch of the second rack 2652. Because the tooth pitch of the first rack 2651 is greater than the tooth pitch of the second rack 2652, the transmission ratio can be increased. Under the condition that the locking force of the locking assembly is constant, a relatively smaller force can be applied to the operating handle 300 to achieve unlocking, thus achieving a labor-saving effect.

[0042] like Figure 4 , Figure 5 and Figure 6As shown, the bottom of the outrigger head end seat 210 is provided with a linear groove 212, the guiding direction of which is parallel to the length direction of the first rack 2651. The right-angled double-sided rack 265 includes a rack slider 2653 slidably connected to the linear groove 212 along its guiding direction. A guide rod 267 is fixedly connected to the outrigger head end seat 210 within the linear groove 212, the axial direction of which is parallel to the length direction of the first rack 2651. The rack slider 2653 is sleeved on the outer periphery of the guide rod 267 and slidably connected to it.

[0043] like Figure 4 , Figure 5 and Figure 6 As shown, a return spring 266 is provided inside the linear slide 212. When the swing arm 262 is pulled and rotated by the traction line 410, the return spring 266 is compressed by the rack and pinion slider 2653 and accumulates elastic potential energy. A torsion spring 269 is sleeved on the outer circumference of the rotating shaft 261. The torsion spring 269 is located between the swing arm 262 and the side mounting base 211. One end of the torsion spring 269 is connected to the side mounting base 211 and the other end is connected to the swing arm 262. When the swing arm 262 is pulled and rotated by the traction line 410, the torsion spring 269 is torsioned and accumulates elastic potential energy. When the operating handle 300 is rotated to the unlocked state, the traction force applied to the traction cable 410 disappears, the torsion spring 269 and the return spring 266 are released, which can instantly drive the inner drive shaft 251 and the outer drive shaft 252 to rotate, thereby instantly driving the first locking assembly to lock the middle leg tube 222 and the front leg tube 221, and simultaneously driving the second locking assembly to lock the rear leg tube 223 and the middle leg tube 222. There is no obvious locking delay during the locking process of the support leg 200.

[0044] like Figure 4 , Figure 5 and Figure 6 As shown, one side of the side mounting base 211 is provided with an arc-shaped limiting groove 211A, the center of which is located on the axis of the rotating shaft 261. A guide shaft 268 is fixed to one end of the swing arm 262 connected to the traction line 410. The axis of the guide shaft 268 is parallel to the axis of the rotating shaft 261, and one end of the guide shaft 268 extends into the arc-shaped limiting groove 211A. The cooperation between the guide shaft 268 and the arc-shaped limiting groove 211A allows the swing arm 262 to swing within a predetermined direction and angle range.

[0045] like Figure 7As shown, the first locking assembly includes a first fixed sleeve 231, a first rotating sleeve 232, and a first sliding sleeve 233. The first fixed sleeve 231 is fixedly connected to the interior of the middle leg tube 222, with one end extending into the front leg tube 221. The outer wall of the first fixed sleeve 231 has a first inclined conical surface. The first rotating sleeve 232 is coaxially arranged with the first fixed sleeve 231, maintaining relative axial fixation and relative circumferential rotation. The first rotating sleeve 232 is sleeved on the outer periphery of the outer drive shaft 252 and maintains relative circumferential fixation with the outer drive shaft 252. The first sliding sleeve 233 is located inside the front leg tube 221 and partially sleeved on the outer periphery of the first fixed sleeve 231. The first sliding sleeve 233 is threadedly connected to the outer periphery of the first rotating sleeve 232. When the outer drive shaft 252 drives the first rotating sleeve 232 to rotate circumferentially, one end of the first sliding sleeve 233 slides into the gap between the first fixed sleeve 231 and the front leg tube 221 and presses the first inclined conical surface of the first fixed sleeve 231 to lock the front leg tube 221 and the middle leg tube 222, or one end of the first sliding sleeve 233 slides out of the gap between the first fixed sleeve 231 and the front leg tube 221 and releases the first inclined conical surface of the first fixed sleeve 231 to unlock the front leg tube 221 and the middle leg tube 222.

[0046] like Figure 7 As shown, a first ball bearing 234 is embedded inside the first sliding sleeve 233, with a portion of the first ball bearing 234 protruding from the inner wall surface of the first sliding sleeve 233 and abutting against the first inclined conical surface. Specifically, the first inclined conical surface includes a primary first inclined conical surface 231A and a secondary first inclined conical surface 231B arranged sequentially along the axial direction of the first fixed sleeve 231; there are two first balls bearing 234, which respectively contact the primary first inclined conical surface 231A and the secondary first inclined conical surface 231B. This structure of two-stage inclined conical surfaces and two balls improves locking reliability.

[0047] like Figure 7 As shown, the first locking assembly also includes a first limiting sleeve 235 located inside the front leg tube 221 and sleeved and fixed to the outer periphery of the first rotating sleeve 232. The first limiting sleeve 235 is located at one end of the first sliding sleeve 233 near the outrigger head seat 210. A first elastic element 236 is provided between the first limiting sleeve 235 and the first sliding sleeve 233. The first elastic element 236 is used to provide a bias pressure to the first sliding sleeve 233 so that the first sliding sleeve 233 can be better reset.

[0048] like Figure 7As shown, the first locking assembly includes a first fixed sleeve 231, a first rotating sleeve 232, and a first sliding sleeve 233. The first fixed sleeve 231 is fixedly connected to the interior of the middle leg tube 222, with one end extending into the front leg tube 221. The outer wall of the first fixed sleeve 231 has a first inclined conical surface. The first rotating sleeve 232 is coaxially arranged with the first fixed sleeve 231, maintaining relative axial fixation and relative circumferential rotation. The first rotating sleeve 232 is sleeved on the outer periphery of the outer drive shaft 252 and maintains relative circumferential fixation with the outer drive shaft 252. The first sliding sleeve 233 is located inside the front leg tube 221 and partially sleeved on the outer periphery of the first fixed sleeve 231. The first sliding sleeve 233 is threadedly connected to the outer periphery of the first rotating sleeve 232. When the outer drive shaft 252 drives the first rotating sleeve 232 to rotate circumferentially, one end of the first sliding sleeve 233 slides into the gap between the first fixed sleeve 231 and the front leg tube 221 and presses the first inclined conical surface of the first fixed sleeve 231 to lock the front leg tube 221 and the middle leg tube 222, or one end of the first sliding sleeve 233 slides out of the gap between the first fixed sleeve 231 and the front leg tube 221 and releases the first inclined conical surface of the first fixed sleeve 231 to unlock the front leg tube 221 and the middle leg tube 222.

[0049] like Figure 8 As shown, the second locking assembly includes a second fixed sleeve 241, a second rotating sleeve 242, and a second sliding sleeve 243. The second fixed sleeve 241 is fixedly connected to the interior of the rear leg tube 223, with one end extending into the middle leg tube 222. The outer wall of the second fixed sleeve 241 has a second inclined conical surface. The second rotating sleeve 242 is coaxially arranged with the second fixed sleeve 241, maintaining relative axial fixation and relative circumferential rotation. The second rotating sleeve 242 is sleeved on the outer periphery of the outer drive shaft 252 and maintains relative circumferential fixation with the outer drive shaft 252. The second sliding sleeve 243 is located inside the middle leg tube 222 and partially sleeved on the outer periphery of the second fixed sleeve 241. The second sliding sleeve 243 is threadedly connected to the outer periphery of the second rotating sleeve 242. When the outer drive shaft 252 drives the second rotating sleeve 242 to rotate circumferentially, one end of the second sliding sleeve 243 slides into the gap between the second fixed sleeve 241 and the middle leg tube 222 and presses the second inclined conical surface of the second fixed sleeve 241 to lock the middle leg tube 222 and the rear leg tube 223, or one end of the second sliding sleeve 243 slides out of the gap between the second fixed sleeve 241 and the front leg tube 221 and releases the second inclined conical surface of the second fixed sleeve 241 to unlock the middle leg tube 222 and the rear leg tube 223.

[0050] like Figure 8As shown, a second ball bearing 244 is embedded inside the second sliding sleeve 243, with a portion of the second ball bearing 244 protruding from the inner wall surface of the second sliding sleeve 243 and abutting against the second inclined conical surface. Specifically, the second inclined conical surface includes a primary second inclined conical surface 241A and a secondary second inclined conical surface 241B arranged sequentially along the axial direction of the second fixed sleeve 241; there are two second balls bearing 244, which respectively contact the primary second inclined conical surface 241A and the secondary second inclined conical surface 241B. This structure of two-stage inclined conical surfaces and two balls improves locking reliability.

[0051] like Figure 8 As shown, the second locking assembly also includes a second limiting sleeve 245 located inside the front leg tube 221 and sleeved and fixed to the outer periphery of the second rotating sleeve 242. The second limiting sleeve 245 is located at one end of the second sliding sleeve 243 near the outrigger head seat 210. A second elastic member 246 is provided between the second limiting sleeve 245 and the second sliding sleeve 243. The second elastic member 246 is used to provide a bias pressure to the second sliding sleeve 243 so that the second sliding sleeve 243 can be better reset.

[0052] like Figure 4 , Figure 5 and Figure 9 As shown, the portions of the three traction cables 410 extending out of the outrigger head end seat 210 are all fitted with protective sleeves 420. The three traction cables 410 are routed through the internal channels of their respective protective sleeves 420. The traction cables 410 can be steel wires similar in material to brake cables. The protective sleeves 420 reduce friction during movement within their internal channels, thereby improving the response speed of the traction cables 410 under tension. One end of the protective sleeve 420 connected to the outrigger head end seat 210 connector has a pipe interface. The mounting platform 100 has an annular cavity 101 circumferentially surrounding the connector 110. The three protective sleeves 420 extend into the annular cavity 101 from the bottom opening of the mounting platform 100, and after routing around the annular cavity 101, they extend to the control handle. The ends of the three protective sleeves 420 away from the outrigger head end seat 210 all pass through openings in the side wall of the mounting platform 100 and extend into the control handle 300.

[0053] like Figure 1 and Figure 9 As shown, three leg connecting seats 120 are fixedly connected to the outer periphery of the mounting platform 100, and three support legs 200 are respectively hinged to the three leg connecting seats 120 on the outer periphery of the mounting platform 100.

[0054] like Figure 1 , Figures 9-12As shown, the operating handle 300 includes a handle shaft 310, a handle rotating sleeve 320, a handle sliding sleeve 330, a fixing pin 340, a handle hinge joint 350, a handle connecting seat 360, and a handle locking knob 370. The handle hinge joint 350 is fixedly connected to the outer periphery of the mounting platform 100. The interior of the handle hinge joint 350 is hollow, and three traction lines 410 extending from the three protective sleeves 420 extend from the inner cavity of the handle hinge joint 350 to the movable cavity 311 of the handle shaft 310. The handle connecting seat 360 is fixedly connected to the end of the handle shaft 310 near the handle hinge joint 350. The handle connecting seat 360 is rotatably connected to the handle hinge joint 350 around a hinge axis, and the hinge axis is connected to a handle locking knob 370 for locking the handle connecting seat 360 and the handle hinge joint 350. The handle locking knob 370 is used to adjust the angle of the operating handle 300.

[0055] like Figure 1 , Figures 9-12 As shown, one end of the handle shaft 310 is fixedly connected to the handle connecting seat 360, and the handle shaft 310 has a movable cavity 311 inside. The handle shaft 310 has a through groove 312 that radially penetrates the handle shaft 310 and extends along its own axial direction. The handle rotating sleeve 320 is sleeved on the outer circumference of the handle shaft 310, and the handle rotating sleeve 320 and the handle shaft 310 are fixed relative to each other in the axial direction and rotate relative to each other in the circumferential direction. The handle sliding sleeve 330 is slidably sleeved on the outer circumference of the handle shaft 310 along the axial direction of the handle shaft 310, and the handle sliding sleeve 330 is threaded to the inner wall of the handle rotating sleeve 320. The fixing pin 340 is fixedly connected to the handle sliding sleeve 330 and slidably connected to the through groove 312 along the axial direction of the handle shaft 310. Three traction lines 410 are fixedly connected to the fixing pin 340 through the movable cavity 311 of the handle shaft 310. The fixing pin 340 has three through holes for the traction cable 410 to pass through. The traction cable 410 is connected to a limiting end of the traction cable 410 with an outer diameter larger than the through holes and abutting against the limiting position of the fixing pin 340. The handle shaft 310 and the handle rotating sleeve 320 constitute the fixed part of the operating handle 300, and the handle sliding sleeve 330 and the fixing pin 340 constitute the moving part of the operating handle 300.

[0056] like Figures 9-12 As shown, the outer wall of the handle shaft 310 is provided with a pair of protruding limiting ribs 313, the length 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 groove that slides with the limiting ribs 313.

[0057] In summary, the one-button operation support leg provided by this invention has one end of the traction cable 410 connected to the gear transmission assembly of the support leg 200. When the traction cable 410 is pulled, it can drive the leg tube locking assembly to lock or release the multi-section leg tube of the leg tube assembly 220 through the gear transmission assembly and the transmission shaft assembly. Simultaneously, the other ends of the traction cables 410 connected to each of the three support legs 200 are connected to the operating handle 300. When the operating handle 300 is operated, it can simultaneously apply traction force to at least three traction cables 410, thereby enabling the simultaneous locking or unlocking of the three support legs 200. This allows for one-button release and one-button fixation of the three support legs 200, simplifying operation and effectively improving the extension and retraction adjustment speed of the support legs 200. Compared with existing one-button operation support legs using an electrically controlled operating handle 300, it does not require charging and eliminates the need to carry additional chargers, power banks, or other equipment, resulting in better portability. Compared with existing one-button operation support legs using a hydraulically driven handle, it achieves instant locking without any locking delay. In the gear transmission assembly, because the tooth pitch of the first rack 2651 is greater than that of the second rack 2652, the transmission ratio can be increased. With a fixed locking force in the locking assembly, a relatively smaller force is required to unlock the lever 300, achieving a labor-saving effect. When the lever 300 is rotated to the unlocked state, the torsion spring 269 and the return spring 266 are released, instantly driving the transmission shaft assembly to rotate, which in turn instantly drives the leg tube locking assembly to lock the multi-section leg tubes, without any noticeable locking delay.

[0058] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A one-touch support stand, comprising a mounting platform (100), at least three support legs (200) connected to one end of 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: a leg head end seat (210) connected to the mounting platform (100) at one end; a leg pipe assembly (220) comprising a plurality of leg pipes arranged in sequence from outside to inside and axially telescopic, one end of the leg pipe located at the outermost layer being fixedly connected to the leg head end seat (210); a leg pipe locking assembly located in the support leg (200) and used to realize locking or unlocking of the plurality of leg pipes; a transmission shaft assembly located in the support leg (200) and arranged rotatable around its own axis, the transmission shaft assembly being in transmission connection with the leg pipe locking assembly; a gear transmission assembly installed in the leg head end seat (210) and having its power output end in transmission connection with the transmission shaft assembly; a traction line (410) connected to the power input end of the gear transmission assembly; the traction line (410) drives the leg pipe locking assembly to be in a locked state or an unlocked state through the gear transmission assembly and the transmission shaft assembly; at least three traction lines (410) are connected to the operation handle (300) after extending out of the leg head end seat (210), the operation handle (300) being used to simultaneously apply traction to the at least three traction lines (410).

2. The one-key operation support stand according to claim 1, wherein, The gear transmission assembly is installed inside the leg head end seat (210); the gear transmission assembly comprises: a rotating shaft (261) connected to the leg head end seat (210) and arranged rotatable around its own axis; a swing arm (262) fixedly connected at one end to the rotating shaft (261) and at the other end to the traction line (410); a first gear (263) fixedly sleeved and connected to the rotating shaft (261) and synchronously rotated with the swing arm (262); a second gear (264) connected to the leg head end seat (210) and coaxially fixedly connected to the transmission shaft assembly; the second gear (264) is in transmission connection with the first gear (263); when the traction line (410) is pulled, the swing arm (262), the rotating shaft (261) and the first gear (263) are rotated around the axis of the rotating shaft (261), and the first gear (263) drives the second gear (264) and the transmission shaft assembly to rotate around their own axes.

3. The one-key operation support stand of claim 2, wherein, The gear transmission assembly further comprises a right-angle double-sided rack (265) in transmission connection between the first gear (263) and the second gear (264), the right-angle double-sided rack (265) comprising a first rack (2651) and a second rack (2652) having tooth surfaces perpendicular to each other, the first rack (2651) being in mesh with the first gear (263) and the second rack (2652) being in mesh with the second gear (264).

4. The one-key operation support stand of claim 3, wherein, The first rack (2651) has a larger pitch than the second rack (2652).

5. The one-key operation support stand of claim 3, wherein, The bottom of the leg head end seat (210) is provided with a linear sliding groove (212), the guide direction of the linear sliding groove (212) is parallel to the length direction of the first rack (2651), and the straight double-sided rack (265) comprises a rack sliding block (2653) which is slidingly connected to the linear sliding groove (212) along the guide direction of the linear sliding groove (212).

6. The one-key operation support stand of claim 5, wherein, The linear sliding groove (212) is provided with a reset spring (266), when the swing arm (262) is rotated by the traction line (410), the reset spring (266) is compressed by the rack sliding block (2653) and accumulates elastic potential energy.

7. The one-key operation support stand of claim 5, wherein, The linear sliding groove (212) is provided with a guide rod (267) fixedly connected to the leg head end seat (210), the axial direction of the guide rod (267) is parallel to the length direction of the first rack (2651), and the rack sliding block (2653) is sleeved on the outer periphery of the guide rod (267) and is slidingly connected to the guide rod (267).

8. The one-key operation support stand of claim 2, wherein, The inner side wall of the leg head end seat (210) is fixedly connected with a side mounting seat (211), one end of the rotating shaft (261) is connected to the side mounting seat (211), the side mounting seat (211) is provided with an arc-shaped limiting groove (211A), the center of the arc-shaped limiting groove (211A) is located on the axis of the rotating shaft (261), one end of the swing arm (262) connected with the traction line (410) is fixedly provided with a guide shaft (268), the axial direction of the guide shaft (268) is parallel to the axial direction of the rotating shaft (261), and one end of the guide shaft (268) extends into the arc-shaped limiting groove (211A).

9. The one-key operation support stand of claim 8, wherein, The gear transmission assembly further comprises a torsional spring (269) sleeved on the outer periphery of the rotating shaft (261), the torsional spring (269) is located between the swing arm (262) and the side mounting seat (211), one end of the torsional spring (269) is connected to the side mounting seat (211), and the other end is connected to the swing arm (262); when the swing arm (262) is rotated by the traction line (410), the torsional spring (269) is twisted and accumulates elastic potential energy.

10. The one-key operation support stand of claim 1, wherein, The mounting platform (100) is provided with a connector (110) arranged centrally and used for mounting photographic equipment, the inside of the mounting platform (100) is provided with an annular cavity (101) arranged circumferentially around the connector (110); a plurality of protective sleeves (420) are arranged around the annular cavity (101), one end of the plurality of protective sleeves (420) penetrates out of the mounting platform (100) and is connected to the operating handle (300), the other end of the plurality of protective sleeves (420) penetrates out of the mounting platform (100) and is respectively connected to the plurality of leg head end seats (210), and a plurality of traction lines (410) are respectively routed through the internal passages of the plurality of protective sleeves (420).

11. The one-key operation support stand of claim 1, wherein, The leg tube assembly (220) comprises a front leg tube (221), a middle leg tube (222) and a rear leg tube (223) arranged in sequence from outside to inside and axially telescopic, the front leg tube (221), the middle leg tube (222) and the rear leg tube (223) being kept relatively circumferentially fixed; The leg tube locking assembly comprises a first locking assembly installed between the front leg tube (221) and the middle leg tube (222), and a second locking assembly installed between the middle leg tube (222) and the rear leg tube (223); The transmission shaft assembly comprises an inner transmission shaft (251) fixedly connected to a power output end of the gear transmission assembly, and an outer transmission shaft (252) sleeved on an outer periphery of the inner transmission shaft (251) and kept relatively circumferentially fixed and relatively axially slidable with the inner transmission shaft (251); the outer transmission shaft (252) is operatively connected to the first locking assembly to releasably prevent movement of the middle leg tube (222) relative to the front leg tube (221), and the outer transmission shaft (252) is operatively connected to the second locking assembly to releasably prevent movement of the rear leg tube (223) relative to the middle leg tube (222).

12. The one-key operation support stand of claim 11, wherein, The first locking assembly comprises: a first fixed sleeve (231) fixedly connected to the middle leg tube (222) and having one end extending into the front leg tube (221); an outer wall of the first fixed sleeve (231) is provided with a first inclined taper surface; a first rotating sleeve (232) coaxially arranged with the first fixed sleeve (231) and kept relatively axially fixed and relatively circumferentially rotatable with the first fixed sleeve (231); the first rotating sleeve (232) is sleeved on an outer periphery of the outer transmission shaft (252) and kept relatively circumferentially fixed with the outer transmission shaft (252); a first sliding sleeve (233) located inside the front leg tube (221) and at least partially sleeved on an outer periphery of the first fixed sleeve (231), the first sliding sleeve (233) being threadedly connected to an outer periphery of the first rotating sleeve (232); when the outer transmission shaft (252) drives the first rotating sleeve (232) to circumferentially rotate, one end of the first sliding sleeve (233) slides into a gap between the first fixed sleeve (231) and the front leg tube (221) and presses the first inclined taper surface of the first fixed sleeve (231) to realize locking of the front leg tube (221) and the middle leg tube (222), or one end of the first sliding sleeve (233) slides out of the gap between the first fixed sleeve (231) and the front leg tube (221) and releases the first inclined taper surface of the first fixed sleeve (231) to realize unlocking of the front leg tube (221) and the middle leg tube (222).

13. The one-key operation support stand of claim 12, wherein, the first sliding sleeve (233) is internally embedded with first balls (234), part of the first balls (234) protruding from an inner wall surface of the first sliding sleeve (233) and abutting against the first inclined taper surface.

14. The one-key operation support stand of claim 13, wherein, The first inclined conical surface comprises a first-level first inclined conical surface (231A) and a second-level first inclined conical surface (231B) arranged in sequence along the axial direction of the first fixed sleeve (231); the first rolling ball (234) has two first rolling balls (234) respectively in contact with the first-level first inclined conical surface (231A) and the second-level first inclined conical surface (231B).

15. The one-key operation support stand of claim 12, wherein, The first locking assembly further comprises a first limiting sleeve (235) located inside the front section leg pipe (221) and sleeved and fixed on the outer periphery of the first rotating sleeve (232), the first limiting sleeve (235) being located at one end of the first sliding sleeve (233) close to the leg head end base (210), and a first elastic member (236) being arranged between the first limiting sleeve (235) and the first sliding sleeve (233).

16. The one-key operation support stand of claim 12, wherein, The second locking assembly has the same structure as the first locking assembly.

17. The one-key operation support stand of any one of claims 1-16, wherein, The operation handle (300) comprises an operation part connected to the mounting platform (100) and a movement part driven to move by the operation part, and the at least three traction lines (410) are connected to the movement part after extending out of the leg head end base (210).

18. The one-key operation support stand of claim 17, wherein, The operation part comprises: a handle shaft (310) having one end connected to the mounting platform (100), an inner cavity (311) being arranged in the handle shaft (310), and a through sliding groove (312) being arranged in the handle shaft (310) and extending along the axial direction of the handle shaft (310); a handle rotating sleeve (320) sleeved on the outer periphery of the handle shaft (310) and arranged in relative axial fixation and relative circumferential rotation with the handle shaft (310); The movement part comprises: a handle sliding sleeve (330) sleeved on the outer periphery of the handle shaft (310) and screw-connected to the inner wall of the handle rotating sleeve (320) along the axial direction of the handle shaft (310); a fixed pin (340) fixedly connected to the handle sliding sleeve (330) and slidably connected to the through sliding groove (312) along the axial direction of the handle shaft (310); and a plurality of traction lines (410) fixedly connected to the fixed pin (340) through the inner cavity of the handle shaft (310).

19. The one-key operation support stand of claim 18, wherein, The fixed pin (340) is provided with a plurality of threading holes for the traction lines (410) to pass through, and the traction lines (410) are connected with traction line limiting head ends having an outer diameter greater than the threading holes and abutting against the fixed pin (340) in position.

20. The one-key operation support stand of claim 19, wherein, The outer wall of the handle shaft (310) is provided with an outwardly protruding limiting rib (313) extending along the axial direction of the handle shaft (310), and the inner wall of the handle sliding sleeve (330) is provided with a limiting groove in sliding cooperation with the limiting rib (313).

21. The one-key operation support stand of claim 19, wherein, The outer periphery of the mounting platform (100) is fixedly connected with a handle hinge joint (350), the operation handle (300) comprises a handle connecting seat (360) fixedly connected with a handle shaft (310) at one end close to the handle hinge joint (350), the handle connecting seat (360) is rotationally connected with the handle hinge joint (350) around a hinge shaft, and the hinge shaft is connected with a handle locking knob (370) for locking the handle connecting seat (360) and the handle hinge joint (350).

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