Foot tube quick unlocking and locking structure and supporting frame

Abstract

The utility model discloses a quick unlocking and locking structure for a foot tube and a support frame. The quick unlocking and locking structure for the foot tube comprises a fixed tube group, a first telescopic tube group, a second telescopic tube group, a first mounting seat, a second mounting seat, a third mounting seat, a first locking assembly, a second locking assembly and a transmission shaft, by means of the structure, simultaneous locking and simultaneous unlocking between the first telescopic pipe set and the fixed pipe set and between the second telescopic pipe set and the first telescopic pipe set can be achieved, then rapid folding and rapid unfolding of the supporting frame are achieved, the operation convenience and efficiency of the supporting frame are improved, and the use requirement is met.

Description

TECHNICAL FIELD

[0001] The utility model relates to photographic equipment field, especially a quick locking and unlocking structure of foot tube and support frame. BACKGROUND

[0002] Mobile phone and camera (or tablet computer, notebook computer etc.) are the common equipment in people's daily life and work, in order to conveniently satisfy some user's use demand to the shooting, will use support frame to support shooting equipment when shooting, convenient for liberating user's both hands, support frame usually includes multiple support feet, and the support foot is telescopic, thereby adjusting the height of support frame, this telescopic support foot has 3 sections of foot tube, and a group of locking mechanisms are arranged between adjacent two sections of foot tube, each group of locking mechanisms has independent locking / unlocking switch, needs to open two groups of locking / unlocking switches to be able to unfold all foot tubes on the support foot, wants to unfold entire support frame, then needs to open 6 locking / unlocking switches, it is extremely inconvenient to use, therefore, the quick locking and unlocking structure of foot tube and support frame are needed to solve the above problems. SUMMARY

[0003] The utility model aims at at least solving one of the technical problems existing in the prior art. To this end, the utility model provides a quick locking and unlocking structure of foot tube and support frame.

[0004] The technical scheme adopted by one embodiment of the utility model to solve its technical problem is: a quick locking and unlocking structure of foot tube, including fixed pipe group, first telescopic pipe group, second telescopic pipe group, first mounting seat, second mounting seat, third mounting seat, first locking assembly, second locking assembly and transmission shaft;

[0005] The first mounting seat is installed at the end of the fixed pipe group;

[0006] The second mounting seat is axially movably arranged on the fixed pipe group and located above the first mounting seat;

[0007] The third mounting seat is arranged below the first mounting seat;

[0008] The first end of the first telescopic pipe group is connected with the second mounting seat, the tail end is arranged on the first mounting seat and connected with the third mounting seat;

[0009] The second telescopic pipe group is axially movably arranged on the first telescopic pipe group;

[0010] The first locking assembly is arranged on the second mounting seat and has locking position and unlocking position;

[0011] The second locking assembly is arranged on the third mounting seat and has locking position and unlocking position;

[0012] One end of the transmission shaft is connected with the first locking assembly, and the other end is arranged on the first mounting seat and connected with the second locking assembly;

[0013] The transmission shaft can drive the first locking assembly and the second locking assembly to enter the locking position when rotating in the forward direction, so as to limit the movement between the first telescopic pipe group and the fixed pipe group and limit the movement between the second telescopic pipe group and the first telescopic pipe group; or the transmission shaft can drive the first locking assembly and the second locking assembly to enter the unlocking position when rotating in the reverse direction, so that the first telescopic pipe group can move relative to the fixed pipe group and the second telescopic pipe group can move relative to the first telescopic pipe group.

[0014] As one of the preferred embodiments of the utility model, the fixed pipe group comprises a first fixed pipe and a second fixed pipe arranged on both sides of the first telescopic pipe group, and the first locking assembly comprises a transmission assembly, a first limiting push block and a second limiting push block;

[0015] The transmission assembly has an input end, a first output end and a second output end, and the input end is connected with one end of the transmission shaft;

[0016] The first limiting push block is arranged between the first telescopic pipe group and the first fixed pipe and connected with the first output end;

[0017] The second limiting push block is arranged between the first telescopic pipe group and the second fixed pipe and connected with the second output end;

[0018] The transmission shaft can drive the first limiting push block and the second limiting push block to move away from each other through the transmission assembly when rotating in the forward direction, so that the first limiting push block abuts against the first fixed pipe and the second limiting push block abuts against the second fixed pipe; or the transmission shaft can drive the first limiting push block and the second limiting push block to move towards each other through the transmission assembly when rotating in the reverse direction, so that the first limiting push block is separated from the first fixed pipe and the second limiting push block is separated from the second fixed pipe.

[0019] As one of the preferred embodiments of the utility model, the transmission assembly comprises a first bevel gear, a second bevel gear and a third bevel gear;

[0020] The first bevel gear is arranged on one end of the transmission shaft to constitute the input end;

[0021] The second bevel gear is arranged on the first limiting push block and meshed with the first bevel gear to constitute the first output end;

[0022] The third bevel gear is arranged on the second limiting push block and meshed with the first bevel gear to constitute the second output end.

[0023] As one of the preferred embodiments of the utility model, one end of the first limiting push block is connected with the first output end, and a first arc-shaped groove matched with the first fixed pipe is arranged on the other end of the first limiting push block; one end of the second limiting push block is connected with the second output end, and a second arc-shaped groove matched with the second fixed pipe is arranged on the other end of the second limiting push block.

[0024] As one of the preferred embodiments of the utility model, the first telescopic pipe group comprises a first foot pipe and a second foot pipe arranged on both sides of the transmission shaft, the second telescopic pipe group comprises a third foot pipe inserted into the first foot pipe and a fourth foot pipe inserted into the second foot pipe, and the second locking assembly comprises a movable seat, a first limiting sleeve and a second limiting sleeve;

[0025] The movable seat is screw-connected to the transmission shaft;

[0026] The first limiting sleeve is arranged on the movable seat, and the third foot pipe is inserted into the first limiting sleeve;

[0027] The second limiting sleeve is arranged on the movable seat, and the fourth foot pipe is inserted into the second limiting sleeve;

[0028] The movable seat can drive the first limiting sleeve and the second limiting sleeve to abut against the third mounting seat and deform when the transmission shaft rotates in the forward direction, so as to abut against the third foot pipe and the fourth foot pipe respectively; or the movable seat can drive the first limiting sleeve and the second limiting sleeve to separate from the third mounting seat and deform to recover when the transmission shaft rotates in the reverse direction, so as to separate from the third foot pipe and the fourth foot pipe respectively.

[0029] As one of the preferred embodiments of the utility model, the first limiting sleeve comprises a connecting portion and a plurality of clamping pieces arranged on the connecting portion in the circumferential direction, the connecting portion is connected with the movable seat, and a first inclined surface is arranged on the outer wall of the clamping piece; a second inclined surface matched with the first inclined surface is arranged on the third mounting seat.

[0030] A support frame comprising the foot pipe quick unlocking and locking structure.

[0031] The foot pipe quick unlocking and locking structure and the support frame have the following beneficial effects: the foot pipe quick unlocking and locking structure comprises a fixed pipe group, a first telescopic pipe group, a second telescopic pipe group, a first mounting seat, a second mounting seat, a third mounting seat, a first locking assembly, a second locking assembly and a transmission shaft; the above structure can realize simultaneous locking and unlocking between the first telescopic pipe group and the fixed pipe group and between the second telescopic pipe group and the first telescopic pipe group, thereby realizing quick folding and unfolding of the support frame, improving the operation convenience and efficiency of the support frame, and meeting the use requirements. BRIEF DESCRIPTION OF DRAWINGS

[0032] The above and / or additional aspects and advantages of the utility model will become apparent and more readily appreciated from the following description of the embodiments, with reference to the following drawings, in which:

[0033] Figure 1 Figure 1 is a schematic view of a support frame in a collapsed state according to a first embodiment of the present application;

[0034] Figure 2 Figure 2 is a schematic view of the support frame in an expanded state according to the first embodiment of the present application;

[0035] Figure 3 Figure 3 is a first exploded view of part of the support frame according to the first embodiment of the present application;

[0036] Figure 4 Figure 4 is a cross-sectional view of part of the support frame according to the first embodiment of the present application; Figure 3 Figure 5 is a close-up view of area A in Figure 4;

[0037] Figure 5 Figure 6 is a second exploded view of part of the support frame according to the first embodiment of the present application;

[0038] Figure 6 Figure 7 is a cross-sectional view of part of the support frame according to the first embodiment of the present application; Figure 5 Figure 8 is a close-up view of area B in Figure 7;

[0039] Figure 7 Figure 9 is a cross-sectional view of part of the support frame according to the first embodiment of the present application;

[0040] Figure 8 Figure 10 is a schematic view of a support frame in a collapsed state according to a second embodiment of the present application;

[0041] Figure 9 Figure 11 is a first exploded view of part of the support frame according to the second embodiment of the present application;

[0042] Figure 10 Figure 12 is a close-up view of area C in Figure 11. Figure 9 DETAILED DESCRIPTION In the description of the present application, the meaning of multiple is two or more, greater than, less than, more than, etc. are understood as not including the number, above, below, etc. are understood as including the number. If there is a description of the first, second, it is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the sequence of indicated technical features.

[0043] In the description of the present application, the meaning of multiple is two or more, greater than, less than, more than, etc. are understood as not including the number, above, below, etc. are understood as including the number. If there is a description of the first, second, it is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the sequence of indicated technical features.

[0044] In the description of the present application, the meaning of multiple is two or more, greater than, less than, more than, etc. are understood as not including the number, above, below, etc. are understood as including the number. If there is a description of the first, second, it is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the sequence of indicated technical features.

[0045] In the description of the utility model, need understanding, relate to the direction description, for example, the direction or position relation of indication such as upper, lower, front, back, left, right is based on the direction or position relation shown in drawing, only for the convenience of describing the utility model and simplifying description, and not indicate or imply the device or element indicated must have a particular orientation, with a particular orientation configuration and operation, therefore can not be understood as the limitation of the utility model.

[0046] In the utility model, unless otherwise explicitly limited, the words such as "set", "install", "connect" should be understood broadly, for example, can be directly connected, also can be indirectly connected through intermediate medium;Can be fixedly connected, can also be detachably connected, can also be integrally formed;Can be mechanical connection;It can be the communication or mutual action relationship of two elements inside two elements. The skilled in the art can determine the specific meaning of the above words in the utility model in combination with the specific content of technical scheme.

[0047] 1) with reference to Figure 1 、 2 And 8, in the utility model, with the support frame including three cutting seats and three support legs rotatably connected to the three cutting seats as an example to be described, wherein each support leg includes fixed tube group 100, first telescopic tube group 200, second telescopic tube group 300, first mounting seat 410, second mounting seat 420, third mounting seat 430, first locking assembly 500, second locking assembly 600, transmission shaft 700 and drive assembly 800;First mounting seat 410 is installed at the end of fixed tube group 100;Second mounting seat 420 is axially movably arranged on fixed tube group 100 and located above first mounting seat 410;Third mounting seat 430 is arranged below first mounting seat 410;The first end of first telescopic tube group 200 is connected with second mounting seat 420, the end is arranged on first mounting seat 410 and is connected with third mounting seat 430;Second telescopic tube group 300 is axially movably arranged on first telescopic tube group 200;First locking assembly 500 is arranged on second mounting seat 420 and has locking position and unlocking position;Second locking assembly 600 is arranged on third mounting seat 430 and has locking position and unlocking position;One end of transmission shaft 700 is connected with first locking assembly 500, the other end is arranged on first mounting seat 410 and is connected with second locking assembly 600;Drive assembly 800 is connected with transmission shaft 700, for driving transmission shaft 700 to rotate forward or reversely.

[0048] Specifically, when the support leg needs to be unfolded, power is input through the driving assembly 800, thereby driving the transmission shaft 700 to rotate forward or reversely, when the transmission shaft 700 rotates forward, the first locking assembly 500 and the second locking assembly 600 will be driven into the locking position, and when the transmission shaft 700 reversely rotates, the first locking assembly 500 and the second locking assembly 600 will be driven into the unlocking position; when the first locking assembly 500 and the second locking assembly 600 are in the unlocking position, the restriction between the first telescopic pipe group 200 and the fixed pipe group 100 and between the second telescopic pipe group 300 and the first telescopic pipe group 200 will be respectively released, at this time, the first telescopic pipe group 200 can be unfolded or folded axially relative to the fixed pipe group 100, and the second telescopic pipe group 300 can be unfolded or folded axially relative to the first telescopic pipe group 200; when the first locking assembly 500 and the second locking assembly 600 are in the locking position, the movement between the first telescopic pipe group 200 and the fixed pipe group 100 and between the second telescopic pipe group 300 and the first telescopic pipe group 200 will be respectively limited, thereby realizing the maintenance of the unfolded state or the folded state of the support frame.

[0049] 2) Refer to Figures 3-4 In some embodiments, the fixed pipe group 100 includes the first fixed pipe 110 and the second fixed pipe 120 arranged on both sides of the first telescopic pipe group 200, the first locking assembly 500 includes the transmission assembly 510, the first limiting push block 520 and the second limiting push block 530; the transmission assembly 510 has an input end, a first output end and a second output end, the input end is connected with one end of the transmission shaft 700; the first limiting push block 520 is arranged between the first telescopic pipe group 200 and the first fixed pipe 110 and connected with the first output end; the second limiting push block 530 is arranged between the first telescopic pipe group 200 and the second fixed pipe 120 and connected with the second output end.

[0050] Specifically, when the driving assembly 800 outputs power to the transmission shaft 700, the transmission shaft 700 will rotate, and when the transmission shaft 700 rotates in the forward direction, the transmission assembly 510 will drive the first limiting push block 520 and the second limiting push block 530 to move away from each other, forcing the first limiting push block 520 to abut against the first fixed tube 110 and forcing the second limiting push block 530 to abut against the second fixed tube 120, so that the second connecting seat 420 cannot move axially relative to the first fixed tube 110 and the second fixed tube 120, i.e., the first telescopic tube group 200 cannot move axially relative to the fixed tube group 100; when the transmission shaft 700 rotates in the reverse direction, the transmission assembly 510 drives the first limiting push block 520 and the second limiting push block 530 to move towards each other, forcing the first limiting push block 520 to separate from the first fixed tube 110 and forcing the second limiting push block 530 to separate from the second fixed tube 120, so that the second connecting seat 420 can move axially relative to the first fixed tube 110 and the second fixed tube 120, i.e., the first telescopic tube group 200 can move axially relative to the fixed tube group 100; it should be noted that the first limiting push block 520 and the second limiting push block 530 are connected to the second connecting seat 420 through a guide structure, so that the rotational movement of the first limiting push block 520 and the second limiting push block 530 is converted into linear movement in the horizontal direction.

[0051] 3) with reference to Figures 3-4 In some embodiments, the transmission assembly 510 includes a first bevel gear 511, a second bevel gear 512, and a third bevel gear 513; the first bevel gear 511 is arranged on one end of the transmission shaft 700 to constitute an input end; the second bevel gear 512 is arranged on the first limiting push block 520 and meshes with the first bevel gear 511 to constitute a first output end; the third bevel gear 513 is arranged on the second limiting push block 530 and meshes with the first bevel gear 511 to constitute a second output end; the cooperation of the first bevel gear 511, the second bevel gear 512, and the third bevel gear 513 can realize the switching of the forward rotation and the reverse rotation of the transmission shaft 700.

[0052] 4) with reference to Figures 3-4 In some embodiments, one end of the first limiting push block 520 is connected to the first output end, and the other end of the first limiting push block 520 is provided with a first arc-shaped groove 521 matched with the first fixed tube 110; one end of the second limiting push block 530 is connected to the second output end, and the other end of the second limiting push block 530 is provided with a second arc-shaped groove 531 matched with the second fixed tube 120.

[0053] Specifically, through the cooperation between the first arc-shaped groove 521 and the first fixed tube 110 and the cooperation between the second arc-shaped groove 531 and the second fixed tube 120, better adhesion with the fixed tube can be achieved, and further, the first limiting push block 520 and the second limiting push block 530 are made of a material with a high friction coefficient, which is conducive to improving the locking effect.

[0054] 5)Refer to Figures 5-7 In some embodiments, the first telescopic tube group 200 includes the first leg tube 210 and the second leg tube 220 arranged on both sides of the transmission shaft 700, the second telescopic tube group 300 includes the third leg tube 310 inserted into the first leg tube 210 and the fourth leg tube 320 inserted into the second leg tube 220, and the second locking assembly 600 includes the movable seat 610, the first limiting sleeve 620, and the second limiting sleeve 630; the movable seat 610 is threadedly connected to the transmission shaft 700; the first limiting sleeve 620 is arranged on the movable seat 610, and the third leg tube 310 is inserted through the first limiting sleeve 620; the second limiting sleeve 630 is arranged on the movable seat 610, and the fourth leg tube 320 is inserted through the second limiting sleeve 630.

[0055] Specifically, when the driving assembly 800 outputs power to the transmission shaft 700, the transmission shaft 700 will rotate, and when the transmission shaft 700 rotates in the forward direction, the movable seat 610 will move upward, causing the first limiting sleeve 620 and the second limiting sleeve 630 on the movable seat 610 to abut against the third mounting seat 430 and deform, so that the first limiting sleeve 620 tightly holds the third leg tube 310 and the second limiting sleeve 630 tightly holds the fourth leg tube 320, and at this time, the third leg tube 310 cannot move axially relative to the first leg tube 210 and the fourth leg tube 320 cannot move axially relative to the second leg tube 220; when the transmission shaft 700 rotates in the reverse direction, the movable seat 610 will move downward, causing the first limiting sleeve 620 and the second limiting sleeve 630 on the movable seat 610 to separate from the third mounting seat 430 and deform to recover, so that the first limiting sleeve 620 releases the third leg tube 310 and the second limiting sleeve 630 releases the fourth leg tube 320, and at this time, the third leg tube 310 can move axially relative to the first leg tube 210 and the fourth leg tube 320 can move axially relative to the second leg tube 220.

[0056] 6)Refer to Figures 5-7In some embodiments, the first limiting sleeve 620 comprises a connecting portion 621 and a plurality of clamping pieces 622 circumferentially arranged on the connecting portion 621, the connecting portion 621 is connected with the movable seat 610, the outer wall of the clamping pieces 622 is provided with a first inclined surface 623, the third mounting seat 430 is provided with a second inclined surface abutting against the first inclined surface 623; the plurality of clamping pieces 622 enclose a locking space, the third leg pipe 310 is arranged in the locking space, when the movable seat 610 moves upward, the clamping pieces 622 will be deformed inward under the cooperation of the first inclined surface and the second inclined surface, so as to reduce the locking space and realize the clamping of the third leg pipe 310; when the movable seat 610 moves downward, the first inclined surface is separated from the second inclined surface, the clamping pieces 622 lose the external force and restore the deformation, the locking space is increased, and the clamping of the third leg pipe 310 is released.

[0057] 7) With reference to Figures 1-4 and Figure 8 As a first embodiment of the driving assembly 800, the driving assembly 800 comprises a buckle 810a, a first tooth portion 820a arranged on the buckle 810a, and a first gear 830a connected with the transmission shaft 700, the first gear 830a is engaged with the first tooth portion 820a, the buckle 810a can drive the transmission shaft 700 to rotate forward through the first tooth portion 820a and the first gear 830a when the buckle 810a is switched from the first position to the second position, or the buckle 810a can drive the transmission shaft 700 to rotate reversely through the first tooth portion 820a and the first gear 830a when the buckle 810a is switched from the second position to the first position.

[0058] Specifically, when the buckle 910a is in the first position, the first locking assembly 500 and the second locking assembly 600 are in the unlocking position, when the buckle 910a is in the second position, the first locking assembly 500 and the second locking assembly 600 are in the locking position; when the buckle 910a is switched from the first position to the second position, the transmission shaft 700 will be driven to rotate forward through the first tooth portion 820a and the first gear 830a, so as to maintain the unfolded state or the folded state of the support frame, when the buckle 910a is switched from the second position to the first position, the transmission shaft 700 will be driven to rotate reversely through the first tooth portion 820a and the first gear 830a, at this time, the support frame can be unfolded or folded; this embodiment is manually operated.

[0059] 8) With reference to Figures 1-2 and Figures 5-7As the second embodiment of the driving assembly 800, the driving assembly 800 comprises a hydraulic cylinder 810b, a piston rod 820b, a first pipe 830b, a second pipe 840b and a hydraulic driving mechanism 850b; the hydraulic cylinder 810b is movably arranged in the first mounting base 410, and a rack 860b is arranged on the outer wall of the hydraulic cylinder 810b; a second gear 870b engaged with the rack 860b is arranged on the other end of the transmission shaft 700; one end of the piston rod 820b is connected with the first mounting base 410, and the other end of the piston rod 820b is inserted into the hydraulic cylinder 810b, so that the inner cavity of the hydraulic cylinder 810b is divided into a first hydraulic cavity 811b and a second hydraulic cavity 812b; one end of the first pipe 830b is in communication with the first hydraulic cavity 811b, and one end of the second pipe 840b is in communication with the second hydraulic cavity 812b; the first pipe 830b and the second pipe 840b are filled with a hydraulic medium; the other end of the first pipe 830b and the other end of the second pipe 840b are in communication with the hydraulic driving mechanism 850b.

[0060] Specifically, when the hydraulic driving mechanism 850b is operated into the first state, the hydraulic medium will enter the first hydraulic cavity 811b along the first pipe 830b, so that the hydraulic medium in the first hydraulic cavity 811b increases, and part of the hydraulic medium in the second hydraulic cavity 812b is discharged through the second pipe 840b; since the piston rod 820b is not moved, the hydraulic cylinder 810b moves in the horizontal direction, and the rack 860b on the hydraulic cylinder 810b moves accordingly, so that the transmission shaft 700 is driven to rotate forward by the second gear 870b, thereby realizing the maintenance of the unfolded state or the maintenance of the folded state of the support frame; when the hydraulic driving mechanism 850b is operated into the second state, the hydraulic medium will enter the second hydraulic cavity 812b along the second pipe 840b, so that the hydraulic medium in the second hydraulic cavity 812b increases, and part of the hydraulic medium in the first hydraulic cavity 811b is discharged through the first pipe 830b; since the piston rod 820b is not moved, the hydraulic cylinder 810b moves in the horizontal direction, and the rack 860b on the hydraulic cylinder 810b moves accordingly, so that the transmission shaft 700 is driven to rotate reversely by the second gear 870b, and the support frame can be unfolded or folded at this time; it should be noted that the hydraulic cylinder 810b is connected with the first mounting base 410 through a guide structure, so as to avoid the rotary motion of the hydraulic cylinder 810b; and the three groups of driving assemblies 800 on the three support legs share the same set of hydraulic driving mechanisms 850b, so as to realize the one-key unlocking of the three support legs.

[0061] 9) with reference to Figures 1-2 and Figures 8-10As the third embodiment of the driving assembly 800, the driving assembly 800 comprises a motor 810c, a third gear 820c and a fourth gear 830c, the motor 810c is arranged on the first mounting base 410 and connected with the third gear 820c, the fourth gear 830c is connected with the other end of the transmission shaft 700 and engaged with the third gear 820c.

[0062] Specifically, when the motor 810c receives the first signal, it will rotate forward, driving the third gear 820c connected therewith to rotate, and through the engagement of the third gear 820c and the fourth gear 830c, the transmission shaft 700 is driven to rotate forward, realizing the maintenance of the unfolded state or the maintenance of the folded state of the support frame; when the motor 810c receives the second signal, it will rotate reversely, driving the third gear 820c connected therewith to rotate, and through the engagement of the third gear 820c and the fourth gear 830c, the transmission shaft 700 is driven to rotate reversely, realizing the maintenance of the unfolded state or the maintenance of the folded state of the support frame, at this time, the support frame can be unfolded or folded; it should be noted that the three groups of driving assemblies 800 on the three support legs are connected to the same controller, and the controller simultaneously issues the first signal and the second signal to the three motors 810c, so that the one-key unlocking of the three support legs can be realized.

[0063] 10) It should be noted that the first embodiment of the driving assembly 800 can coexist with the second embodiment of the driving assembly 800 or the third embodiment of the driving assembly 800, and the first embodiment of the driving assembly 800 is used as a backup unlocking mechanism, that is, when the second embodiment of the driving assembly 800 or the third embodiment of the driving assembly 800 fails, the unlocking of the support frame can be realized through the first embodiment of the driving assembly 800.

[0064] 11) The utility model discloses the advantage lies in: through above-mentioned structure can realize the simultaneous locking and unlocking between first telescopic pipe group and fixed pipe group and between second telescopic pipe group and first telescopic pipe group, further realize the quick folding and quick unfolding of support frame, improve the operation convenience and efficiency of support frame, satisfy the use demand.

[0065] Of course, the utility model is not limited to the above-mentioned embodiment, and those skilled in the art can make equivalent transformation or replacement without departing from the spirit of the utility model, and these equivalent transformations and replacements are all included in the range defined by the claims of the present application.

Claims

1. A quick release locking structure for a foot tube, characterized by: The fixed pipe group (100), the first telescopic pipe group (200), the second telescopic pipe group (300), the first mounting seat (410), the second mounting seat (420), the third mounting seat (430), the first locking assembly (500), the second locking assembly (600) and the transmission shaft (700) are included. The first mounting seat (410) is arranged at the end of the fixed pipe group (100). The second mounting seat (420) is arranged on the fixed pipe group (100) and above the first mounting seat (410). The third mounting seat (430) is arranged below the first mounting seat (410). The first end of the first telescopic pipe group (200) is connected with the second mounting seat (420), the end is arranged in the first mounting seat (410) and connected with the third mounting seat (430). The second telescopic pipe group (300) is arranged on the first telescopic pipe group (200). The first locking assembly (500) is arranged on the second mounting seat (420) and has a locking position and an unlocking position. The second locking assembly (600) is arranged on the third mounting seat (430) and has a locking position and an unlocking position. One end of the transmission shaft (700) is connected with the first locking assembly (500), the other end is arranged in the first mounting seat (410) and connected with the second locking assembly (600). When the transmission shaft (700) rotates in the positive direction, the first locking assembly (500) and the second locking assembly (600) are driven to enter the locking position, so as to limit the movement between the first telescopic pipe group (200) and the fixed pipe group (100) and the movement between the second telescopic pipe group (300) and the first telescopic pipe group (200); or when the transmission shaft (700) rotates in the reverse direction, the first locking assembly (500) and the second locking assembly (600) are driven to enter the unlocking position, so that the first telescopic pipe group (200) can move relative to the fixed pipe group (100) and the second telescopic pipe group (300) can move relative to the first telescopic pipe group (200).

2. A quick release locking structure for a foot tube according to claim 1, characterized in that: The fixed pipe group (100) includes the first fixed pipe (110) and the second fixed pipe (120) arranged on both sides of the first telescopic pipe group (200), and the first locking assembly (500) includes the transmission assembly (510), the first limiting push block (520) and the second limiting push block (530). The transmission assembly (510) has an input end, a first output end and a second output end, and the input end is connected with one end of the transmission shaft (700). The first limiting push block (520) is arranged between the first telescopic pipe group (200) and the first fixed pipe (110) and connected with the first output end. The second limiting push block (530) is arranged between the first telescopic pipe group (200) and the second fixed pipe (120) and connected with the second output end. The transmission shaft (700) can drive the first limiting push block (520) and the second limiting push block (530) to move away from each other when rotating in a forward direction through the transmission assembly (510), so that the first limiting push block (520) abuts against the first fixed pipe (110) and the second limiting push block (530) abuts against the second fixed pipe (120); or the transmission shaft (700) can drive the first limiting push block (520) and the second limiting push block (530) to move towards each other when rotating in a reverse direction through the transmission assembly (510), so that the first limiting push block (520) is separated from the first fixed pipe (110) and the second limiting push block (530) is separated from the second fixed pipe (120).

3. A quick release locking structure for a foot tube according to claim 2, characterized in that: The transmission assembly (510) comprises a first bevel gear (511), a second bevel gear (512) and a third bevel gear (513); The first bevel gear (511) is arranged on one end of the transmission shaft (700) to constitute the input end; The second bevel gear (512) is arranged on the first limiting push block (520) and meshes with the first bevel gear (511) to constitute the first output end; The third bevel gear (513) is arranged on the second limiting push block (530) and meshes with the first bevel gear (511) to constitute the second output end.

4. The quick release locking structure of a foot pipe according to claim 2, characterized in that: One end of the first limiting push block (520) is connected with the first output end, and the other end of the first limiting push block (520) is provided with a first arc-shaped groove (521) matched with the first fixed pipe (110); one end of the second limiting push block (530) is connected with the second output end, and the other end of the second limiting push block (530) is provided with a second arc-shaped groove (522) matched with the second fixed pipe (120).

5. The quick release locking structure of a foot tube according to claim 1, characterized in that: The first telescopic pipe group (200) comprises a first foot pipe (210) and a second foot pipe (220) arranged on both sides of the transmission shaft (700), the second telescopic pipe group (300) comprises a third foot pipe (310) inserted into the first foot pipe (210) and a fourth foot pipe (320) inserted into the second foot pipe (220), and the second locking assembly (600) comprises a movable seat (610), a first limiting sleeve (620) and a second limiting sleeve (630); The movable seat (610) is threadedly connected to the transmission shaft (700); The first limiting sleeve (620) is arranged on the movable seat (610), and the third foot pipe (310) is inserted through the first limiting sleeve (620); The second limiting sleeve (630) is arranged on the movable seat (610), and the fourth foot pipe (320) is inserted through the second limiting sleeve (630); The movable seat (610) can drive the first limiting sleeve (620) and the second limiting sleeve (630) to abut against the third mounting seat (430) and deform when the transmission shaft (700) rotates forward, so as to abut against the third leg pipe (310) and the fourth leg pipe (320) respectively; or the movable seat (610) can drive the first limiting sleeve (620) and the second limiting sleeve (630) to separate from the third mounting seat (430) and deform to recover when the transmission shaft (700) rotates reversely, so as to separate from the third leg pipe (310) and the fourth leg pipe (320) respectively.

6. A quick release locking structure for a foot tube according to claim 5, wherein: The first limiting sleeve (620) comprises a connecting portion (621) and a plurality of clamping pieces (622) circumferentially arranged on the connecting portion (621), the connecting portion (621) is connected with the movable seat (610), and a first inclined surface (623) is arranged on an outer wall of the clamping piece (622), and a second inclined surface abutting against the first inclined surface (623) is arranged on the third mounting seat (430).

7. A support frame characterized by: The foot pipe quick unlocking and locking structure comprises the foot pipe quick unlocking and locking structure according to any one of claims 1-6.

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