CN220622382U - Telescopic foot tube and photographic support frame - Google Patents

Abstract

The utility model relates to a telescopic foot tube and a photographic support frame. The foot pipe assembly is a telescopic pipe and comprises at least three branch pipes sleeved in sequence; the locking assembly comprises a plurality of locking pieces, each locking piece is rotationally sleeved at the joint of two adjacent branch pipes, and the relative axial movement of the two adjacent branch pipes (namely the telescopic fixation of the foot pipe assembly) is controlled by screwing or unscrewing; the knob assembly comprises a plurality of knob members, the knob members are arranged on the outer sides of the locking members and used for being rotated by a user, and the knob members are used for controlling the corresponding locking members to be unscrewed or screwed. In the application, the user can synchronously drive the rotation of the adjacent knob assemblies by rotating one knob assembly, so that synchronous unscrewing or screwing of a plurality of locking pieces is controlled, and synchronous locking and unlocking of the foot tube assemblies are realized.

Description

Telescopic foot tube and photographic support frame

Technical Field

The utility model relates to the technical field of photographic equipment, in particular to a telescopic foot tube and a photographic support frame.

Background

In general, the help of a photographic foot rest is not used for skill shooting in daily life, the foot rest has the main functions of stabilizing a camera no matter for professional users or amateur users, and the foot rest is flexible and retractable by using a connecting rod mechanism in mechanical principle, so that the foot rest has a compact structure, is flexible to retract and release, and is convenient and reliable. Currently, most tripod leg locking structures on the market are knob locking and pulling locking, for example, patent CN202082566U discloses a tripod leg locking mechanism and leg locking mechanism, wherein a single leg is a telescopic leg, and a user locks the telescopic leg by rotating the knob to fix the length of the telescopic leg. However, when the number of the branch pipes of the telescopic leg pipe is at least three, in order to unlock or lock the two adjacent branch pipes simultaneously, the user needs to unscrew or screw the knob members at different positions one by one, so that the unlocking and locking operation process of the telescopic leg pipe is complex and time-consuming.

Disclosure of Invention

The utility model provides a telescopic foot tube and a photographic support, which are used for solving the technical problems that the unlocking and locking operation process of the telescopic foot tube is complex and time-consuming.

In order to solve the technical problems, the utility model adopts the following technical scheme:

the utility model provides a telescopic foot tube, comprising:

1. a telescoping foot tube, comprising:

the foot pipe assembly comprises at least three branch pipes which are sleeved in sequence, and each branch pipe can move along the axial direction of the foot pipe assembly so as to enable the foot pipe assembly to be lengthened or shortened;

the locking assembly comprises a plurality of locking pieces, each locking piece is sleeved at the joint of two adjacent branch pipes, and the locking pieces can be screwed or unscrewed through circumferential rotation relative to the foot pipe assembly so as to limit or release the relative movement of the corresponding two adjacent branch pipes along the axial direction;

the knob assembly comprises a plurality of knob pieces, the knob pieces are arranged on the outer sides of the locking pieces and used for a user to rotate, and the knob pieces can rotate to drive the corresponding locking pieces and the branch pipes to rotate relatively; when the foot pipe assembly is shortened, a single knob piece is rotated to drive the rotation of the other adjacent knob piece, and meanwhile, the two adjacent locking pieces and the branch pipe correspondingly rotate relatively, so that synchronous screwing or unscrewing of the locking pieces is realized.

In one embodiment, the knob member includes an outer ring sleeve and a bump structure, and the outer ring sleeve is sleeved on the locking member; the bump structure is formed on the peripheral side of the outer ring sleeve in a protruding mode; the bump structures on two adjacent outer ring sleeves can be limited circumferentially, so that the circumferential limitation of the two adjacent outer ring sleeves is realized, and one outer ring sleeve rotates to drive the other adjacent outer ring sleeve to synchronously rotate.

In one embodiment, two outer ring sleeves arbitrarily adjacent to each other along the axial direction are defined as a first outer ring sleeve and a second outer ring sleeve respectively, the bump structure in the first outer ring sleeve is defined as a first bump structure, and the bump structure in the second outer ring sleeve is defined as a second bump structure; one of the first bump structure and the second bump structure comprises a protruding part, the other one comprises an extending part, the protruding part protrudes out of the outer side wall of the outer ring sleeve, and the extending part protrudes out of the edge of the outer ring sleeve along the axial direction of the outer ring sleeve; the protruding parts and the extending parts on the two adjacent outer ring sleeves are staggered along the axial direction and mutually abutted and limited.

In one embodiment, the number of the protruding block structures on the same outer ring sleeve is two, and the two extending parts on the same outer ring sleeve are adjacent to the same side of the two protruding parts on the adjacent outer ring sleeve along the circumferential direction.

In one embodiment, both of the extensions of the same outer collar are located at the same end of the outer collar.

In one embodiment, the protruding portion and the extending portion on the same outer ring sleeve are integrally formed.

In one embodiment, the telescopic leg further comprises an embedded part arranged between any two adjacent branch pipes, two adjacent branch pipes sleeved in sequence along the axial direction are defined to be a primary branch pipe and a secondary branch pipe, the embedded part is positioned between the primary branch pipe and the secondary branch pipe, the locking part comprises a vertically extending screwing sleeve and a limiting plate connected with the screwing sleeve and extending radially inwards, the screwing sleeve is sleeved by the knob part and is circumferentially limited, the screwing sleeve is in threaded connection with the primary branch pipe, and the screwing sleeve can rotate relative to the primary branch pipe so as to drive the embedded part to be embedded between the primary branch pipe and the secondary branch pipe through the limiting plate.

In one embodiment, the primary branch pipe is provided with an inner conical surface, the insert is provided with an outer conical surface, the inner conical surface and the outer conical surface have the same inclination angle relative to the axial direction, and the inner conical surface and the outer conical surface can relatively move along the inclination direction of the conical surfaces so as to change the abutting pressure of the primary branch pipe to the secondary branch pipe along the radial direction.

In one embodiment, the outer wall of the screwing sleeve is provided with an outer convex tooth, the inner side of the outer ring sleeve is provided with an inner convex tooth, and the outer convex tooth is engaged and clamped with the inner convex tooth to limit relative rotation between the screwing sleeve and the outer ring sleeve so as to realize circumferential limit of the outer ring sleeve and the locking piece.

In one embodiment, the telescopic leg further comprises a limit screw, a first limit groove extending circumferentially is formed in the outer side of the primary branch pipe, and the limit screw penetrates through the screwing sleeve in the radial direction to be clamped in the first limit groove; the outer ring sleeve can drive the screwing sleeve to synchronously rotate relative to the primary branch pipe, and the limit screw can synchronously move in the first limit groove along the circumferential direction along with the rotation of the screwing sleeve;

in one embodiment, the limiting screw and the first limiting groove can cooperate to limit the relative movement distance between the screwing sleeve and the primary branch pipe so as to control the rotation angle of the screwing sleeve.

In one embodiment, the telescopic leg comprises a limit screw, a second limit groove extending circumferentially is formed in the outer side of the primary branch pipe, and the limit screw penetrates through the outer ring sleeve along the radial direction to be clamped in the second limit groove; the limiting screw can move synchronously in the second limiting groove along with the rotation of the outer ring sleeve along the circumferential direction, and the limiting screw can be matched with the circumferential end part of the second limiting groove to limit the relative rotation angle between the outer ring sleeve and the screwing sleeve.

In a second aspect, the present utility model provides a photographic support frame, including a mounting base and a plurality of telescopic foot tubes according to any one of the foregoing embodiments, where the mounting base is rotatably connected to the telescopic foot tubes, and the plurality of telescopic foot tubes are disposed along an included angle.

As can be seen from the technical scheme, the embodiment of the utility model has at least the following advantages and positive effects:

the telescopic foot tube and the photographic bracket of the embodiment of the utility model comprise a foot tube component, a locking component and a knob component. The foot pipe assembly is a telescopic pipe and comprises at least three branch pipes sleeved in sequence; the locking assembly comprises a plurality of locking pieces, each locking piece is rotationally sleeved at the joint of two adjacent branch pipes, and the relative axial movement of the two adjacent branch pipes (namely the telescopic fixation of the foot pipe assembly) is controlled by screwing or unscrewing; the knob assembly comprises a plurality of knob members, the knob members are arranged on the outer sides of the locking members and used for being rotated by a user, and the knob members are used for controlling the corresponding locking members to be unscrewed or screwed. Compared with the tripod leg pipe and leg pipe locking mechanism disclosed in the patent CN202082566U, although the user controls the telescopic length of the telescopic leg pipe by rotating the locking piece (unscrewing the locking piece, the telescopic leg pipe can be lengthened and shortened, screwing the locking piece and fixing the length of the telescopic leg pipe); but when the branch pipe quantity of flexible foot pipe is three at least, in order to control the flexible length of flexible foot pipe, the user need unscrew one by one or screw the knob spare of different positions to flexible foot pipe in patent CN202082566U, and the flexible foot pipe in this application only need the user just can drive the rotation of adjacent knob spare in step through rotatory knob spare to synchronous unscrewing or screwing of a plurality of retaining members of control realizes the synchronous locking and the unblock to foot pipe assembly. Therefore, the operation convenience in the unlocking and locking processes of the telescopic foot tube is greatly improved, and the time and labor are saved. On the other hand, the knob piece that sets up in the retaining member outside in this application has not only made things convenient for user's operation, has still protected the retaining member owing to not direct contact retaining member operation, has not only prevented that the retaining member from being touched the rotation by mistake, has prolonged the life of flexible foot pipe moreover.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of a telescopic leg according to an embodiment of the present utility model;

FIG. 2 is a schematic view illustrating a structure of a photographing support frame according to an embodiment of the utility model;

FIG. 3 is a schematic view of a partial cross-sectional structure taken along the direction A-A in FIG. 1;

FIG. 4 is a schematic diagram of an exploded view of a telescopic leg according to an embodiment of the present utility model;

FIG. 5 is a schematic view of a partially enlarged structure of the cross-sectional view shown in FIG. 3;

FIG. 6 is a schematic view of a partial explosion structure of the telescoping leg shown in FIG. 4;

FIG. 7 is a partially enlarged view of a telescopic leg according to another embodiment of the present utility model;

FIG. 8 is a schematic view of a telescopic leg according to a second embodiment of the present utility model;

fig. 9 is a schematic view of a partial explosion structure of a telescopic leg according to a second embodiment of the present utility model.

The reference numerals are explained as follows:

1. a photographing support frame; 10. a mounting base; 20. a telescopic foot tube; 200. a foot tube assembly; 210. a branch pipe; 210a, primary branch pipes; 211. a telescopic tube; 212. a threaded tube; 2121. an inner conical surface; 213. a first limit groove; 214. the second limit groove; 210b, secondary branches; 220. a fixed tube; 230. an isolation structure; 240. a fitting groove; 300. a locking assembly; 310. a locking member; 311. screwing the sleeve; 312. a limiting plate; 313. a clamping groove; 314. outer convex teeth; 400. a knob assembly; 410. a knob member; 411. an outer ring sleeve; 411a, a first outer collar; 411b, a second outer collar; 412. a bump structure; 412a, a first bump structure; 412b, a second bump structure; 4121. a boss; 4122. an extension; 413. inner convex teeth; 414. a blocking piece; 500. an insert; 510. a fitting ring; 511. an outer conical surface; 520. a fitting block; 600. and (5) limiting screws.

Detailed Description

Exemplary embodiments that embody features and advantages of the present utility model will be described in detail in the following description. It will be understood that the utility model is capable of various modifications in various embodiments, all without departing from the scope of the utility model, and that the description and illustrations herein are intended to be by way of illustration only and not to be construed as limiting the utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more of the described features. In the description of the present application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "arranged," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art in a specific context.

Referring to fig. 1, the present utility model provides a telescopic leg 20 with convenient length adjustment, and the telescopic leg 20 is mainly used as a bracket and a leg fitting in a photographing support device for supporting photographing devices such as a camera, a video camera and an electronic device. Fig. 2 illustrates a photographing support frame 1, which includes a mounting base 10 and a plurality of telescopic leg tubes 20, wherein the mounting base 10 is used for directly or indirectly mounting photographing apparatus, the plurality of telescopic leg tubes 20 are rotatably connected to the mounting base 10 and uniformly distributed along the circumferential direction of the mounting base 10, and the plurality of telescopic leg tubes 20 are used for being supported on a support providing a horizontal or substantially horizontal plane, such as a ground or a table top, etc., so as to support the photographing apparatus. In this application, the mount pad 10 is through threaded interface's cloud deck indirect mounting shooting equipment, and the cloud deck is connected the mount pad 10 and is deviate from the one side of flexible foot pipe 20. It should be understood that the manner of installing the photographing apparatus on the mounting base 10 is not limited, and in other embodiments, the photographing apparatus may be directly installed on the mounting base 10 by a quick-mounting base, a threaded connection, a snap connection, a locking shaft, or the like.

Referring to fig. 3 and 4 in combination, the telescopic leg 20 includes a leg assembly 200, a locking assembly 300 and a knob assembly 400, which are sequentially sleeved from inside to outside. Wherein, the foot tube assembly 200 is used as the main body of the telescopic foot tube 20 and comprises a plurality of branch tubes 210 sleeved in sequence; the locking assembly 300 comprises a plurality of locking members 310, and each locking member 310 is sleeved at the joint of two adjacent branch pipes 210; fig. 4 illustrates that the knob assembly 400 includes a plurality of knob members 410, each knob member 410 is disposed on the outer side of one locking member 310 for a user to rotate, and the rotation of the knob member 410 can drive the relative rotation between the corresponding locking member 310 and the branch tube 210. Adjacent two knob members 410 in this application can act synchronously to achieve synchronous locking or synchronous unlocking of the entire telescoping leg tube 20.

Referring to fig. 3, in the present application, each of the branch pipes 210 is movable in an axial direction of the foot pipe assembly 200 so that the foot pipe assembly 200 can be lengthened or shortened. Specifically, the number of branch pipes 210 in the present embodiment is 5. In the state that the telescopic foot pipe 20 stretches to the shortest, the 5 branch pipes 210 are flush near the initial end of the installation seat 10, the radial sizes of the 5 branch pipes 210 are sequentially increased from inside to outside, the length sizes are correspondingly reduced in sequence, and the sleeved design not only ensures that the foot pipe assembly 200 has stronger structural compactness; and the foot tube assembly 200 can achieve maximum length extension with the same number of branch tubes 210. The telescopic leg 20 further comprises a fixing tube 220, and the fixing tube 220 is sleeved on one side of the outermost branch tube 210 away from the locking member 310. In addition, the outer sidewall of each branch pipe 210 is convexly provided with an isolation structure 230, and the isolation structure 230 enables a gap to exist between the inner sidewall and the outer sidewall of any two adjacent pipe fittings (the fixed pipe 220 and the branch pipe 210; the two adjacent branch pipes 210), so that the relative motion friction force between the adjacent pipe fittings is reduced, and the movement of each branch pipe 210 along the axial direction is smoother, so that the process of stretching or shortening the foot pipe assembly 200 by a user is easier and more labor-saving. It should be understood that in other embodiments, the number of branch pipes 210 is not limited, and it is only necessary to satisfy the number of branch pipes 210 as at least three in the present application (which will be explained later in detail); second, the radial dimension change and the length dimension change of each branch pipe 210 are not directly related according to the starting end position of each branch pipe 210, and only the relation of sequential sleeving needs to be satisfied and each branch pipe 210 can move along the axial direction.

Referring to fig. 3, in the present application, each locking member 310 can be rotated with respect to the foot tube assembly 200 to be screwed or unscrewed to restrict or release the relative movement of the corresponding adjacent two branch tubes 210 in the axial direction, thereby achieving locking or unlocking of the foot tube assembly 200. The corresponding two adjacent branch pipes 210 described herein refer to the two adjacent branch pipes 210 sleeved with the locking member 310. When the locking member 310 is screwed, the locking member 310 is limited to move relatively in the axial direction between two adjacent branch pipes 210 correspondingly sleeved, i.e. the two adjacent branch pipes 210 cannot be relatively lengthened or shortened in the axial direction, so as to fix the length of the foot pipe assembly 200; when retaining member 310 is unscrewed, the restriction of the relative movement of the corresponding adjacent two branch pipes 210 of retaining member 310 in the axial direction is released, i.e., the two adjacent branch pipes 210 can be relatively lengthened and shortened in the axial direction to change the length of foot pipe assembly 200.

Referring to fig. 5 and 6 in combination, any two adjacent branch pipes 210 sleeved in sequence in the axial direction are defined as a primary branch pipe 210a and a secondary branch pipe 210b (the radial dimension of the primary branch pipe 210a is larger than that of the secondary branch pipe 210b, i.e., the primary branch pipe 210a is sleeved on the secondary branch pipe 210 b), wherein the primary branch pipe 210a comprises a threaded pipe 212 of a telescopic pipe 211 connected in the axial direction, wherein the telescopic pipe 211 is sleeved on the secondary branch pipe 210b, and a gap exists between the threaded pipe 212 and the secondary branch pipe 210b to form a fitting groove 240. Telescoping leg 20 further includes an insert 500 disposed between any two adjacent legs 210, wherein insert 500 engages with engagement groove 240 (i.e., between primary leg 210a and secondary leg 210 b). In addition, the corresponding locking member 310 includes a vertically extending tightening sleeve 311 and a radially inwardly extending limiting plate 312 connected to the tightening sleeve 311. The screwing sleeve 311 is screwed with the threaded pipe 212 of the primary branch pipe 210a and can rotate relative to the primary branch pipe 210a, so as to drive the insert 500 to be clamped into the embedding groove 240 through the limiting plate 312. Specifically, the insert 500 includes a vertically extending engaging ring 510 and an engaging block 520 connected to the engaging ring 510 and extending radially outward, wherein the engaging ring 510 is sleeved on the secondary branch pipe 210b and engaged with the engaging groove 240; the limiting plate 312 is provided with a radially recessed clamping groove 313, and the engaging block 520 can align the clamping and clamping groove 313 to axially limit the locking member 310 and the insert 500. The screwing sleeve 311 moves synchronously in the axial direction (characteristic of threaded connection) relative to the threaded tube 212 in the process of rotating relative to the threaded tube 212, and meanwhile, the limiting plate 312 moves synchronously along the axial direction along with the rotation of the screwing sleeve 311 and drives the embedded block 520 clamped in the clamping groove 313 to move synchronously along the axial direction, so that the embedded block 520 drives the embedded ring 510 to be clamped in the embedded groove 240. It should be understood that, first, extension tube 211 and threaded tube 212 may be integrally formed, so long as primary branch tube 210a is screwed with retaining member 310 and forms fitting groove 240 with secondary branch tube 210 b. Here, as compared to the extension tube 211 being integrally formed with the screw tube 212, the screw tube 212 is provided separately with several advantages: first, the primary branch pipe 210a can be conveniently detached and sleeved; secondly, the screw thread is convenient to process; third, the threaded tube 212 is spaced from the secondary branch pipe 210b, and a fitting groove is more easily formed. The number of the fitting rings 510 is not limited, and may be annular and may be sleeved on the outer wall of the second branch pipe 210b, or may be one or more blocks spaced from each other and engaged in the fitting groove 240. In addition, the engaging block 520 and the locking groove 313 are just one specific way to realize the axial relative limiting of the locking member 310 and the insert 500, and in other embodiments, the engaging block 520 and the locking groove 313 may not be provided.

In addition, the threaded pipe 212 is provided with an inner conical surface 2121, the fitting ring 510 is provided with an outer conical surface 511, the inclination angle of the inner conical surface 2121 and the outer conical surface 511 relative to the axial vertical direction is the same, the inner conical surface 2121 is in surface contact with the outer conical surface 511 and moves relatively along the inclination direction of the conical surface so as to change the extrusion force between the two surfaces, thereby changing the contact pressure of the threaded pipe 212 to the fitting block 520 along the radial direction and further changing the contact pressure of the primary branch pipe 210a to the secondary branch pipe 210b along the radial direction. Here, during screwing the locking member 310, the locking member 310 drives the insert 500 to move along the direction of axially clamping into the embedded groove 240 (in this application, the insert 500 moves vertically upwards), the radial abutting pressure of the primary branch pipe 210a on the secondary branch pipe 210b becomes large, and the primary branch pipe 210a and the secondary branch pipe 210b can be relatively fixed along the axial direction, so as to realize locking of the telescopic foot pipe 20; in the process of unscrewing the locking member 310, the locking member 310 drives the insert 500 to move along the direction of axially separating from the fitting groove 240 (in this application, the insert 500 moves vertically downwards), the radial abutting pressure of the primary branch pipe 210a on the secondary branch pipe 210b becomes smaller, and the primary branch pipe 210a and the secondary branch pipe 210b can move relatively along the axial direction, so as to unlock the telescopic leg 20. It should be understood that, in one embodiment, the inner cone 2121 and the outer cone 511 are used to unscrew or screw the locking member 310 (to change the radial contact pressure of the primary branch pipe 210a to the secondary branch pipe 210 b), and in other embodiments, only at least one of the inner cone 2121 and the outer cone 511 may be provided to unscrew or screw the locking member 310; the positions of the inner cone 2121 and the outer cone 511 are not limited, and for example, in other embodiments, two cones may be disposed between the insert 500 and the earpiece 210b, and loosening or tightening of the locking member 310 may be achieved.

Referring to fig. 1 and 7 in combination, in this application, first, each knob member 410 rotates to enable relative rotation between the corresponding locking member 310 and the branch pipe 210, where the corresponding locking member 310 and the branch pipe 210 refer to the locking member 310 sleeved by the knob member 410, and two adjacent branch pipes 210 sleeved by the locking member 310. In this application, when the foot tube assembly 200 is shortened, rotating the single knob member 410 can drive the rotation of another adjacent knob member 410, and simultaneously drive the relative rotation between the corresponding two adjacent locking members 310 and the branch tube 210, so as to realize synchronous screwing or unscrewing of a plurality of consecutive adjacent locking members 310. Thus, the relative fixation or relative movement between any two adjacent branch pipes 210 is realized, and the synchronous locking or synchronous unlocking of the foot pipe assembly 200 in the application is realized. It should be understood that the number of the knob members 410 is not limited and at least two, and two adjacent knob members 410 can be linked to synchronously rotate to drive the corresponding two adjacent locking members 310 to synchronously screw or unscrew, so as to realize synchronous locking or synchronous unlocking of at least three branch pipes 210 sleeved in sequence along the axial direction.

Referring to fig. 7, the knob member 410 includes an outer ring housing 411 and a bump structure 412, and one outer ring housing 411 is sleeved on one locking member 310; the bump structure 412 is formed protruding from the peripheral side of the outer ring 411. The bump structures 412 on the two adjacent outer ring sleeves 411 can be limited relatively to realize circumferential limitation of the two adjacent outer ring sleeves 411, so that one outer ring sleeve 411 can rotate to drive the adjacent outer ring sleeve 411 to rotate synchronously, and synchronous screwing or unscrewing of a plurality of continuous adjacent locking pieces 310 is realized. Specifically, the bump structure 412 includes a boss 4121 and an extension 4122, the boss 4121 is formed protruding from an outer sidewall of the outer ring casing 411, and the extension 4122 is formed protruding from an edge of the outer ring casing 411 along an axial direction of the outer ring casing 411. The protruding portions 4121 and the extending portions 4122 on the adjacent two outer ring sleeves 411 are staggered in the axial direction and mutually abutted and limited. In this embodiment, fig. 1 illustrates that the number of the protruding structures 412 on the same outer ring 411 is two, and two extending portions 4122 on the same outer ring 411 are circumferentially abutted to the same side of two protruding portions 4121 on the adjacent outer ring 411, and at this time, the extending portions 4122 on the same outer ring 411 are all located at the same end of the outer ring 411.

It should be understood that, first, the outer ring 411 and the bump structure 412 are only one specific way to achieve the synchronous unlocking or locking of the foot tube assembly 200 by the knob assembly 400, and in other embodiments, only the bump structure 412 may be disposed on the outer side of the locking member 310, and the synchronous unlocking or locking of the foot tube assembly 200 can be achieved without the outer ring 411; secondly, the abutment of the protruding portion 4121 and the extending portion 4122 is just one specific way of circumferentially limiting the two adjacent outer annular sleeves 411, and in other embodiments, other ways, such as mutual cooperation of a clamping block and a clamping groove, may be adopted to achieve circumferential limiting; here, the number and circumferential position distribution of the protruding portions 4121 and the extending portions 4122 are not limited, and for convenience of explanation, two outer annular sleeves 411 arbitrarily adjacent in the axial direction are defined as a first outer annular sleeve 411a and a second outer annular sleeve 411b; the corresponding bump structures 412 on the first outer ring 411a are defined as first bump structures 412a, and the corresponding bump structures 412 on the second outer ring 411b are defined as second bump structures 412b. The number of the first bump structures 412a and the number of the second bump structures 412b are the same and at least one, and one of the first bump structures and the second bump structures is the protrusion 4121, and the other is the extension 4122. Finally, the protruding portion 4121 and the extending portion 4122 on the same outer ring 411 may be integrally formed (as in the present embodiment), or may be separately formed, and the integrally formed configuration may reduce the processing cost. When the number of the bump structures 412 on the same outer ring casing 411 is plural, the extension portions 4122 on the same outer ring casing 411 may or may not be located at the same end of the outer ring casing 411, and it is only required that the protruding portions 4121 and the extension portions 4122 on two adjacent outer ring casings 411 can be correspondingly offset from each other.

The telescopic foot tube 20 and the photographing support frame 1 according to the embodiment of the utility model include a foot tube assembly 200, a locking assembly 300 and a knob assembly 400. Wherein the foot tube assembly 200 is a telescopic tube and comprises at least three branch tubes 210 sleeved in sequence; the locking assembly 300 comprises a plurality of locking members 310, wherein each locking member 310 is rotatably sleeved at the joint of two adjacent branch pipes 210, and the relative axial movement of the two adjacent branch pipes 210 (namely the telescopic fixation of the foot pipe assembly 200) is controlled by screwing or unscrewing; the knob assembly 400 includes a plurality of knob members 410, the knob members 410 being provided at outer sides of the locking members 310 for a user to rotate, the knob members being used to control the unscrewing or screwing of the corresponding locking members 310. Compared with the tripod leg and leg locking mechanism disclosed in CN202082566U, although the user controls the telescopic length of the telescopic leg 20 by rotating the locking member 310 (unscrewing the locking member 310, the telescopic leg 20 can be lengthened and shortened; screwing the locking member 310, the telescopic leg 20 is fixed in length); however, when the number of the branch pipes 210 of the telescopic leg 20 is at least three, in order to control the telescopic length of the telescopic leg 20, the user needs to unscrew or screw the locking members 310 at different positions one by one for the telescopic leg 20 in the patent CN202082566U, but the telescopic leg 20 in the present application can synchronously drive the rotation of the adjacent knob members 410 only by rotating one knob member 410, so as to control the synchronous screwing or unscrewing of the plurality of locking members 310, and realize synchronous locking or unlocking of the leg assembly 200. Thereby greatly improving the operation convenience of the locking or unlocking process of the telescopic foot tube 20, and saving time and labor. On the other hand, the knob member 410 disposed outside the locking member 310 in the present application not only facilitates the operation of the user, but also protects the locking member 310 because it does not directly contact the locking member 310, thereby preventing the locking member 310 from being rotated by a false touch, and prolonging the service life of the telescopic foot tube 20.

Referring to fig. 5 and 6 in combination, the telescopic leg 20 further includes a limit screw 600, and a first limit groove 213 is formed on the outer side of the primary branch pipe 210a, and the limit screw 600 is radially inserted through the tightening sleeve 311 and is engaged with the first limit groove 213. The outer ring sleeve 411 can drive the screwing sleeve 311 to rotate relative to the primary branch pipe 210 a. Because the screwing sleeve 311 is screwed with the primary branch pipe 210a, the screwing sleeve 311 rotates and synchronously moves relative to the primary branch pipe 210a in the axial direction, and at this time, the screwing sleeve 311 drives the limit screw 600 to synchronously move in the axial direction. In addition, fig. 6 illustrates that the first limiting groove 213 can limit the axial moving distance of the limiting screw 600 to limit the rotating angle of the tightening sleeve 311, thereby controlling the unscrewing or tightening angle of the locking member 310 with respect to the branch pipe 210. In this embodiment, fig. 7 illustrates that the outer wall of the screwing sleeve 311 is provided with an outer convex tooth 314, the inner wall of the outer ring sleeve 411 is provided with an inner convex tooth 413, and the outer convex tooth 314 and the inner convex tooth 413 can be engaged and clamped to limit the relative rotation between the screwing sleeve 311 and the outer ring sleeve 411, so as to realize circumferential limit of the screwing sleeve 311 and the outer ring sleeve 411. It should be understood that, first, the number of the limit screws 600 is not limited, and may be one or a plurality of circumferentially distributed limit screws; second, the circumferential limitation of the screwing sleeve 311 and the outer ring sleeve 411 is not limited, and in other embodiments, the circumferential limitation may be implemented by adopting a protrusion and a groove in cooperation.

Second embodiment of telescoping foot tube

The basic structure and functional principle of the foot tube assembly 200, the locking assembly 300, the knob assembly 400 and the insert 500 of the telescopic foot tube 20 of the present embodiment are the same, except that the limiting manner of the limiting screw 600 is different. Specifically, referring to fig. 8 and 9 in combination, a second limit groove 214 is formed on the outer side of the primary branch pipe 210a, and a limit screw 600 penetrates through the outer ring sleeve 411 in the radial direction to be engaged with the second limit groove 214, where the limit screw 600 can cooperate with the circumferential end of the second limit groove 214 to limit the relative rotation angle between the outer ring sleeve 411 and the screwing sleeve 311. Specifically, at this time, the outer ring 411 can drive the primary branch pipe 210a to rotate relative to the screwing sleeve 311, and since the screwing sleeve 311 is in threaded connection with the primary branch pipe 210a, the rotation of the primary branch pipe 210a relative to the screwing sleeve 311 can enable the screwing sleeve 311 to move synchronously in the axial direction. Fig. 8 illustrates that the outer ring housing 411 further includes a blocking block 414 (i.e., a circumferential end of the second limiting groove 214) connected thereto and extending radially inward, and the blocking block 414 can block the axial movement of the tightening sleeve 311 to limit the movement distance thereof, so as to limit the rotation angle of the primary branch pipe 210a, thereby controlling the unscrewing or tightening angle of the locking member 310 with respect to the branch pipe 210. In this embodiment, the stop screw 600 and the second stop slot 214 can cooperate with each other to control the circumferential rotation angle of the outer ring 411, so as to avoid excessive rotation. It should be understood that, first, the number of the limit screws 600 is not limited, and may be one or a plurality of circumferentially distributed limit screws; second, the manner of circumferential limitation between the primary branch pipe 210a and the outer ring 411 is not limited, and in other embodiments, circumferential limitation may be achieved by adopting a protrusion and a groove in cooperation.

While the utility model has been described with reference to several exemplary embodiments, it is to be understood that the terminology used is intended to be in the nature of words of description and of limitation. As the present utility model may be embodied in several forms without departing from the spirit or essential characteristics thereof, it should also be understood that the above-described embodiments are not limited by any of the details of the foregoing description, but rather should be construed broadly within its spirit and scope as defined in the appended claims, and therefore all changes and modifications that fall within the meets and bounds of the claims, or equivalences of such meets and bounds are therefore intended to be embraced by the appended claims.

Claims (12)

1. A telescoping foot tube, comprising:

the foot pipe assembly comprises at least three branch pipes which are sleeved in sequence, and each branch pipe can move along the axial direction of the foot pipe assembly so as to enable the foot pipe assembly to be lengthened or shortened;

the locking assembly comprises a plurality of locking pieces, each locking piece is sleeved at the joint of two adjacent branch pipes, and the locking pieces can be screwed or unscrewed through circumferential rotation relative to the foot pipe assembly so as to limit or release the relative movement of the corresponding two adjacent branch pipes along the axial direction;

the knob assembly comprises a plurality of knob pieces, the knob pieces are arranged on the outer sides of the locking pieces and used for a user to rotate, and the knob pieces can rotate to drive the corresponding locking pieces and the branch pipes to rotate relatively; when the foot pipe assembly is shortened, a single knob piece is rotated to drive the rotation of the other adjacent knob piece, and meanwhile, the two adjacent locking pieces and the branch pipe correspondingly rotate relatively, so that synchronous screwing or unscrewing of the locking pieces is realized.

2. The telescoping leg assembly of claim 1, wherein the knob member comprises an outer collar and a tab structure, the outer collar being engaged with the locking member; the bump structure is formed on the peripheral side of the outer ring sleeve in a protruding mode; the bump structures on two adjacent outer ring sleeves can be limited circumferentially, so that the circumferential limitation of the two adjacent outer ring sleeves is realized, and one outer ring sleeve rotates to drive the other adjacent outer ring sleeve to synchronously rotate.

3. The telescoping leg in accordance with claim 2 wherein two of said outer sleeves, arbitrarily adjacent in the axial direction, are defined as a first outer sleeve and a second outer sleeve, respectively, said bump structure in said first outer sleeve being defined as a first bump structure, said bump structure in said second outer sleeve being defined as a second bump structure; one of the first bump structure and the second bump structure comprises a protruding part, the other one comprises an extending part, the protruding part protrudes out of the outer side wall of the outer ring sleeve, and the extending part protrudes out of the edge of the outer ring sleeve along the axial direction of the outer ring sleeve; the protruding parts and the extending parts on the two adjacent outer ring sleeves are staggered along the axial direction and mutually abutted and limited.

4. A telescoping leg as in claim 3 wherein the number of said projection structures on the same outer collar is two and the two extensions on the same outer collar are circumferentially adjacent the same side of the two projections on the adjacent outer collar.

5. The telescoping leg as in claim 4, wherein both of the extensions of the same outer collar are located at the same end of the outer collar.

6. A telescoping leg as in claim 3 wherein the boss and the extension on the same outer collar are of unitary construction.

7. The telescopic leg according to claim 2, further comprising an insert disposed between any two adjacent branch pipes, defining two adjacent branch pipes sleeved in sequence in an axial direction as a primary branch pipe and a secondary branch pipe, wherein the insert is disposed between the primary branch pipe and the secondary branch pipe, the locking member comprises a vertically extending tightening sleeve and a limiting plate connected with the tightening sleeve and extending radially inward, the tightening sleeve is sleeved with the knob member and limiting circumferentially, the tightening sleeve is in threaded connection with the primary branch pipe, and the tightening sleeve is rotatable relative to the primary branch pipe so as to drive the insert to be embedded between the primary branch pipe and the secondary branch pipe through the limiting plate.

8. The telescoping leg as in claim 7, wherein the primary leg is provided with an inner taper, the insert is provided with an outer taper, the inner taper is at the same angle of inclination relative to the axial direction as the outer taper, and the inner taper and the outer taper are movable relative to each other in the direction of inclination of the tapers to vary the amount of abutment pressure of the primary leg against the secondary leg in the radial direction.

9. The telescoping leg as in claim 7, wherein the outer wall of the tightening sleeve is provided with male teeth, the inner side of the outer sleeve is provided with female teeth, and the male teeth engage and engage with the female teeth to limit relative rotation between the tightening sleeve and the outer sleeve to achieve circumferential restraint of the outer sleeve and the retaining member.

10. The telescopic leg according to claim 7, further comprising a limit screw, wherein a first limit groove extending circumferentially is provided on the outer side of the primary branch pipe, and the limit screw is radially inserted through the tightening sleeve and is engaged with the first limit groove; the outer ring sleeve can drive the screwing sleeve to synchronously rotate relative to the primary branch pipe, and the limit screw can synchronously move in the first limit groove along the circumferential direction along with the rotation of the screwing sleeve;

the screwing sleeve moves axially relative to the primary branch pipe in the rotating process, and the limiting screw and the first limiting groove can be matched to limit the relative movement distance of the screwing sleeve and the primary branch pipe so as to control the rotation angle of the screwing sleeve.

11. The telescopic leg according to claim 7, wherein the telescopic leg comprises a limit screw, a second limit groove extending circumferentially is formed in the outer side of the primary branch pipe, and the limit screw penetrates through the outer ring sleeve in the radial direction to be clamped in the second limit groove; the limiting screw can move synchronously in the second limiting groove along with the rotation of the outer ring sleeve along the circumferential direction, and the limiting screw can be matched with the circumferential end part of the second limiting groove to limit the relative rotation angle between the outer ring sleeve and the screwing sleeve.

12. A photographic support frame, characterized by comprising a mounting seat and a plurality of telescopic foot tubes according to any one of claims 1-11, wherein the mounting seat is rotatably connected with the telescopic foot tubes, and the telescopic foot tubes are arranged in an included angle.