A flexible locking and folding mechanism and bracket

Abstract

The flexible locking and folding mechanism and bracket disclosed by the present invention, the center rod and the legs are connected by a locking and folding component, and the locking and folding component includes a sliding sleeve, a short connecting rod, a long connecting rod I and a long connecting rod II; one end of the long connecting rod I is hingedly connected to the axial upper part of the center rod, and the other end is hingedly connected to the axial upper part of the leg; one end of the long connecting rod II is hingedly connected to the axial lower part of the center rod, and the other end is hingedly connected to the axial lower part of the leg; the long connecting rod I, the corresponding rod section of the leg, the corresponding rod section of the center rod and the long connecting rod II are connected to form a hinged quadrilateral structure; the sliding sleeve is provided on the center rod, and the sliding sleeve is locked and fixed on the center rod by a locking member; one end of the short connecting rod is hingedly connected to the rod section of the long connecting rod I, and the other end is hingedly connected to the sliding sleeve; the sliding sleeve, the long connecting rod I and the short connecting rod are connected to form a slider connecting rod structure. The present invention solves the problem of quickly storing precision cylinder parts of various diameters in a limited space and the space occupied by the bracket after use.

Description

Technical Field

[0001] The invention relates to the field of mechanical technology, and in particular to a flexible locking and folding mechanism and a bracket. Background Art

[0002] When it comes to quickly storing / placing precision cylindrical parts of various diameters in a limited space, a common method is to place the cylindrical parts of different diameters on brackets of corresponding diameter sizes. This results in a wide variety of brackets and the problem of limited space being occupied by the brackets after use. Summary of the invention

[0003] In order to solve the problem of quickly storing precision cylinder parts of various diameters in a limited space and the problem of the space occupied by the bracket after use, the present invention provides a flexible locking and folding mechanism and a bracket to solve the above problems.

[0004] The present invention is achieved through the following technical solutions:

[0005] A flexible locking and folding mechanism comprises a center rod and a leg, wherein the center rod and the leg are connected by a locking and folding component, wherein the locking and folding component comprises a sliding sleeve, a short connecting rod, a long connecting rod I and a long connecting rod II; one end of the long connecting rod I is hingedly connected to the axial upper part of the center rod, and the other end is hingedly connected to the axial upper part of the leg; one end of the long connecting rod II is hingedly connected to the axial lower part of the center rod, and the other end is hingedly connected to the axial lower part of the leg; the long connecting rod I, the corresponding rod section of the leg, the corresponding rod section of the center rod and the long connecting rod II are connected to form a hinged quadrilateral structure; the sliding sleeve is arranged on the center rod, and the sliding sleeve slides along the axial direction of the center rod to a set position, and is connected by The locking piece realizes locking and fixing the sliding sleeve on the center rod; one end of the short connecting rod is hingedly connected to the long connecting rod I, and in the axial direction of the long connecting rod I, the hinged connection part is located between the center rod and the leg; the other end of the short connecting rod is hingedly connected to the sliding sleeve; the sliding sleeve, the long connecting rod I and the short connecting rod are connected to form a slider connecting rod structure; in the use state, multiple legs are arranged around the outer periphery of the center rod, and the distance between the legs and the center rod is adjusted by the stretching action of the hinged quadrilateral structure to adjust the radius of the circle surrounded by the multiple legs; the distance between the legs and the center rod is locked by the slider connecting rod structure and the locking piece to fix the radius of the circle surrounded by the multiple legs.

[0006] The present invention is composed of a center rod, a long connecting rod I, a supporting leg and a long connecting rod II to form a planar hinged quadrilateral structure. The center rod and the long connecting rod I can be connected by various hinged or rotatable structures, and the axis of relative rotation between the two can be perpendicular to the plane where the quadrilateral is located. The hinged structure is such as a pin. Similarly, the long connecting rod I and the supporting leg, the supporting leg and the long chain rod II, and the long connecting rod II and the center rod can be connected by various hinged or rotatable structures, as long as the corresponding axis of relative rotation between the two is perpendicular to the plane where the quadrilateral is located. The present invention is composed of a short connecting rod, a long connecting rod I and a sliding sleeve to form a slider connecting rod structure. The short connecting rod, the long connecting rod I and the sliding sleeve can be connected by various hinged or rotatable structures, and the axis of relative rotation between the short connecting rod and the long connecting rod I, and between the short connecting rod and the sliding sleeve can be perpendicular to the plane where the quadrilateral is located.

[0007] The flexible locking and folding mechanism provided by the present invention is mainly used for combined use as a bracket of a cylinder, such as using a central rod to match multiple legs at the same time, so that all the legs are arranged circumferentially along the outer periphery of the central rod, and by adjusting the hinged quadrilateral structure and synchronously adjusting the distance of each leg from the central rod, the diameter of the ring formed by all the legs can be adjusted to match the diameter of the cylinder, which is further suitable for supporting and fixing cylinders of different diameters. Alternatively, a central rod is used to match one leg, and all the central rods are detachably or integrally fixedly connected through a connecting piece, so that all the central rods are concentrated together, with all the central rods as the base point, and all the legs are arranged in a circular ring with the base point as the center. By independently adjusting the distance of the corresponding legs from the base point through the hinged quadrilateral structure, the diameter of the ring formed by all the legs can be adjusted to match the diameter of the cylinder, which is further suitable for supporting and fixing cylinders of different diameters. The top of the leg is used as the support position, or a support block is installed on the leg to support the cylinder.

[0008] When it is necessary to change the diameter of the supporting position of the leg according to the change of the diameter of the vertical cylinder component, the sleeve is axially slid along the center rod, and the radius distance between the center rod and the corresponding leg is synchronously changed through the hinged quadrilateral structure formed by the hinge between the center rod-long connecting rod I-leg-long connecting rod II and the slider connecting rod structure formed by the sliding sleeve-short connecting rod-long connecting rod I; then the locking piece on the sliding sleeve is used to lock and fix the slider connecting rod structure, so that the angle between the two adjacent sides of the hinged quadrilateral structure is fixed and cannot be stretched, thereby achieving the fixation of the radius between the center rod and the leg; after the support cylinder function is used up, the locking piece is released again to minimize the distance between the leg and the center rod, thereby achieving the folding of the overall bracket structure. In addition, the hinged quadrilateral structure formed by the hinged connection between the center rod-long connecting rod I-leg-long connecting rod II and the slider connecting rod structure formed by the sliding sleeve-short connecting rod-long connecting rod I change continuously during the tensile linkage deformation process. The radius of the circular ring surrounded by all the legs also changes continuously, with strong adaptability, and can be used to support and fix cylinders of different diameters.

[0009] In summary, the present invention solves the problem of flexible self-adaptation of the variable diameter cylinder and the problem of the bracket being quickly folded after support use and not occupying site space.

[0010] Further preferably, in the hinge quadrilateral structure, the quadrilateral is a parallelogram.

[0011] The center rod-long connecting rod I-leg-long connecting rod II are hinged to form any quadrilateral structure. As long as they can be stretched and deformed in linkage, the distance between the center rod and the legs can be adjusted. The present invention further optimizes the design. The center rod-long connecting rod I-leg-long connecting rod II are hinged to form a parallelogram connecting rod structure, so that the axis of the center rod and the axis of the leg can always remain parallel, and the supporting position of the leg on the cylinder body only changes in the radial and axial directions of the circle surrounded by all the legs, and the pitch angle will not change.

[0012] Further preferably, the locking member includes a locking push rod and a locking block; a threaded hole is provided on the side wall of the sliding sleeve; an external thread is provided on the locking push rod section and is adapted to the internal thread of the threaded hole; a locking block is installed at one end of the locking push rod; in the locked state, one end of the locking push rod is screwed into the threaded hole, driving the locking block to move toward the center rod until the locking block and the center rod are in pressing contact so that the sliding sleeve is fixed on the center rod; in the unlocked state, one end of the locking push rod is screwed out of the threaded hole, driving the locking block to disengage from the pressing position of the center rod so that the sliding sleeve can slide on the center rod.

[0013] The locking piece provided by the present invention has a main body consisting of a locking push rod and a locking block, has a simple structure, and is easy to operate. The locking and loosening of the sliding sleeve can be achieved by rotating the locking push rod clockwise or counterclockwise.

[0014] Further preferably, a sliding groove is provided on the side wall of the center rod, and the extension direction of the sliding groove is in the same direction as the axial direction of the center rod; in the unlocked state, the locking block slides along the sliding groove of the center rod at the same time as the sliding sleeve; in the locked state, the locking block is pressed and contacted with the bottom of the sliding groove, and the locking block, the sliding sleeve and the center rod are locked at the same time.

[0015] The present invention preferably provides a slide groove on the center rod, especially in the unlocked state, the sliding sleeve slides along the center rod, and the locking block slides along the slide groove, at this time, the slide groove plays a guiding role.

[0016] Further preferably, the two side walls of the slide groove are of inclined structure, the port width of the slide groove is greater than the bottom width, and the slide groove is of an inverted isosceles trapezoidal structure in the radial cross-sectional direction of the center rod; the side walls of the locking block are provided with symmetrical inclined surfaces adapted to the inclined surfaces of the slide groove; one end of the locking push rod is rotatably connected to the locking block, and the axis of rotation coincides with the axis of the locking push rod.

[0017] In the locked state, the free end face of the locking block is pressed and contacted with the bottom of the chute, and the inclined surface of the side wall of the locking block is pressed and contacted with the inclined surfaces on both sides of the chute, which is conducive to increasing the contact area between the locking block and the center rod. When the positive pressure applied by rotating the locking push rod is the same, the larger the contact area between the locking block and the center rod, the greater the friction resistance, and the more secure the locking state. When unlocking is required, just rotate the locking push rod outward to make the bottom of the locking block separate from the bottom of the chute. At this time, the inclined surface of the locking block will also leave the inclined surface of the chute synchronously. The locking block does not need to be completely moved out of the chute, which is convenient for playing a guiding role.

[0018] A bracket comprises a bracket block and the above-mentioned flexible locking and folding mechanism; a central rod and at least three legs are matched, with the central rod as the center of the circle, and all the legs are arranged in a circular ring shape in the circumferential direction of the central rod with the central rod as the center of the circle; a bracket block is provided on each leg, and the bracket block is used to support the cylinder.

[0019] Taking N groups of legs as an example, N is a positive integer ≥ 3; when it is necessary to change the diameter of the bracket support position according to the change in the diameter of the vertical cylinder component, the sliding sleeve slides along the axial direction of the center rod, and the N sets of hinged quadrilateral structures and N sets of slider connecting rod structures formed by the center rod and the N groups of legs move synchronously, and the radius distance between the center rod and the N groups of legs is changed synchronously; then the locking piece is used to lock the sliding sleeve and the center rod to realize the rapid locking support of the bracket; and the locking piece can be quickly loosened after the bracket is used to realize the folding of the bracket.

[0020] More preferably, it comprises three legs, and the three legs are arranged in a circular shape with the central rod as the center and at equal intervals in the circumferential direction of the central rod.

[0021] Further preferably, the support block is an L-shaped plate, the horizontal plate of the L-shaped plate is connected to the top of the support leg, the horizontal plate of the L-shaped plate is used to contact the bottom of the cylinder to play a supporting role; the vertical plate of the L-shaped plate is used to contact the side wall of the cylinder.

[0022] The present invention has the following advantages and beneficial effects:

[0023] The adaptive diameter flexible locking folding bracket designed by the present invention can be applied to the flexible and rapid storage and retrieval of precision cylinder parts of various diameters, the bracket locking support, and the need for the bracket to be quickly folded after use to avoid occupying site space. When it is necessary to change the diameter of the bracket support position according to the change in the diameter of the vertical cylinder parts, the sliding sleeve slides along the axial direction of the center rod, and the multiple sets of hinged quadrilateral structures and multiple sets of slider connecting rod structures formed by the center rod and multiple groups of legs move synchronously, and the radius distance between the center rod and the N groups of legs is changed synchronously; the sliding sleeve and the center rod are then locked with a locking member to achieve rapid locking support of the bracket; and the locking member can be quickly loosened after the bracket is used to achieve bracket folding. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The drawings described herein are used to provide a further understanding of the embodiments of the present invention, constitute a part of this application, and do not constitute a limitation of the embodiments of the present invention. In the drawings:

[0025] Figure 1 It is a schematic diagram of the side structure of the bracket for the variable diameter cylinder of the present invention, in the maximum expanded state;

[0026] Figure 2 It is a schematic diagram of the side structure of the bracket for the variable diameter cylinder of the present invention, in a folded state;

[0027] Figure 3 for Figure 2 Schematic diagram of the local A structure;

[0028] Figure 4 for Figure 3 Schematic diagram of the BB cross-section structure;

[0029] Figure 5 It is a schematic diagram of the structure of the bracket for the variable diameter cylinder of the present invention from a top view, in the maximum unfolded state; wherein R represents the maximum radius of the bracket after unfolding;

[0030] Figure 6 It is a schematic diagram of the structure of the bracket for the variable diameter cylinder of the present invention from top view, in a folded state; wherein r represents the minimum radius of the bracket after folding;

[0031] Figure 7 It is a schematic diagram of the three-dimensional structure of the bracket for the variable diameter cylinder of the present invention, in the maximum expanded state;

[0032] Figure 8 It is a schematic diagram of the three-dimensional structure of the bracket for the variable diameter cylinder of the present invention, in a folded state;

[0033] Fig. 9 It is a schematic diagram of the working principle of the hinge quadrilateral structure and the slider connecting rod structure of the present invention, in the maximum expansion state;

[0034] Fig.10 It is a schematic diagram of the working principle of the hinge quadrilateral structure and the slider connecting rod structure of the present invention, in a folded state;

[0035] Markings and corresponding parts names in the accompanying drawings: 1-center rod, 2-sliding sleeve, 3-support block, 4-leg, 5-long connecting rod I, 6-short connecting rod, 7-locking block, 8-hemispherical head, 9-locking pin, 10-locking push rod, 11-locking wheel, 12-long connecting rod II; I represents the hinge point of the hinge quadrilateral mechanism, and II represents the hinge point of the slider connecting rod structure. DETAILED DESCRIPTION

[0036] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with embodiments and drawings. The exemplary embodiments of the present invention and their description are only used to explain the present invention and are not intended to limit the present invention.

[0037] Example 1

[0038] The present embodiment provides a flexible locking and folding mechanism, including a center rod 1 and a leg 4, both of which are long round rod structures, and the axial length of the center rod 1 is less than the axial length of the leg 4. The center rod 1 and the leg 4 are connected by a locking and folding component, and the locking and folding component includes a sliding sleeve 2, a short connecting rod 6, a long connecting rod I5 and a long connecting rod II12, the sliding sleeve 2 is a round sleeve structure, the short connecting rod 6, the long connecting rod I5 and the long connecting rod II12 are all round rod structures, and the axial length of the short connecting rod 6 is less than the axial length of the long connecting rod I5 and the long connecting rod II12.

[0039] One axial end of the long connecting rod I5 is hingedly connected to the axial upper position of the center rod 1, and the other end is hingedly connected to the axial middle position of the support leg 4; one axial end of the long connecting rod II12 is hingedly connected to the axial lower position of the center rod 1, and the other end is hingedly connected to the axial lower position of the support leg 4; the long connecting rod I5, the corresponding rod segment of the support leg 4, the corresponding rod segment of the center rod 1 and the long connecting rod II12 are connected to form a hinged quadrilateral structure.

[0040] The sliding sleeve 2 is slidably mounted on the center rod 1, and the axis of the sliding sleeve 2 coincides with or is parallel to the axis of the center rod 1. The sliding sleeve 2 slides axially along the center rod 1 to a set position, and the sliding sleeve 2 is locked and fixed on the center rod 1 by a locking member; one axial end of the short connecting rod 6 is hingedly connected to a certain position of the rod section of the long connecting rod I5, and in the axial direction of the long connecting rod I5, the hinged connection portion is located between the center rod 1 and the support leg 4; the other axial end of the short connecting rod 6 is hingedly connected to the side wall of the sliding sleeve 2; the sliding sleeve 2, the long connecting rod I5 and the short connecting rod 6 are connected to form a slider connecting rod structure.

[0041] The locking member is optimized as follows: it includes a locking push rod 10 and a locking block 7; a threaded hole is provided on the side wall of the sliding sleeve 2, and the axial direction of the threaded hole is perpendicular to the axis of the sliding sleeve 2 and the center rod 1; an external thread is provided on the rod section of the locking push rod 10 to match the internal thread of the threaded hole; a locking block 7 is installed at one end of the locking push rod 10; in the locked state, one end of the locking push rod 10 is screwed into the threaded hole, driving the locking block 7 to move toward the center rod 1 until the locking block 7 and the center rod 1 are pressed and contacted to fix the sliding sleeve 2 on the center rod 1; in the unlocked state, one end of the locking push rod 10 is screwed out of the threaded hole, driving the locking block 7 to disengage from the pressing position of the center rod 1 so that the sliding sleeve 2 can slide on the center rod 1. A sliding groove is provided on the side wall of the center rod 1, and the extension direction of the sliding groove is in the same direction as the axial direction of the center rod 1. Both ends of the extension direction of the sliding groove do not penetrate the center rod 1, so as to limit the sliding of the locking block 7. In the unlocked state, the locking block 7 slides along the slide groove of the center rod 1 with the slide sleeve 2; in the locked state, the locking block 7 is pressed and contacted with the bottom of the slide groove, and the locking block 7, the slide sleeve 2 and the center rod 1 are locked. The two side walls of the slide groove are inclined structures, the port width of the slide groove is greater than the bottom width, and the slide groove is an inverted isosceles trapezoidal structure in the radial cross-sectional direction of the center rod 1; the side walls of the locking block 7 are provided with symmetrical inclined surfaces that match the inclined surfaces of the slide groove. One end of the locking push rod 10 is rotatably connected to the locking block 7, and the axis of rotation coincides with the axis of the locking push rod 10; the rotatable connection structure of the locking push rod 10 and the locking block 7 can be rotatably installed with a hemispherical head 8 in the locking block 7, and the hemispherical head 8 is connected to the end of the locking push rod 10 through a locking pin 9.

[0042] The locking push rod 10 can be rotated manually or automatically with the help of mechanical and motor components. In this embodiment, manual operation is used as an example. In order to facilitate the rotation of the end of the locking push rod 10 by hand, a locking wheel 11 can be set at the free end of the locking push rod 10.

[0043] When in use, multiple legs 4 are arranged around the outer periphery of the central rod 1, and the distance between the legs 4 and the central rod 1 is adjusted by the stretching action of the hinged quadrilateral structure to adjust the radius of the circle surrounded by the multiple legs 4; the distance between the legs 4 and the central rod 1 is locked by the slider connecting rod structure and the locking piece to fix the radius of the circle surrounded by the multiple legs 4.

[0044] Example 2

[0045] The present embodiment provides a bracket for a variable diameter cylinder, comprising a bracket block 3 and a flexible locking and folding mechanism provided in Example 1; a central rod 1 and at least three legs 4 are matched, with the central rod 1 as the center of the circle, and all the legs 4 are arranged in a circular ring shape around the central rod 1 with the central rod 1 as the center of the circle; a bracket block 3 is provided on each leg 4, and the bracket block 3 is used to support the cylinder.

[0046] A further preferred design is to use three legs 4, which are arranged in a circular ring with the center rod 1 as the center and at equal intervals in the circumferential direction of the center rod 1. The support block 3 is an L-shaped plate, the horizontal plate of the L-shaped plate is connected to the top of the legs 4, the horizontal plate of the L-shaped plate is used to contact the bottom of the cylinder to play a supporting role; the vertical plate of the L-shaped plate is used to contact the side wall of the cylinder.

[0047] Example 3

[0048] A bracket for a variable diameter cylinder provided in Example 2 is used as follows:

[0049] 1. The bracket is placed vertically, and the locking wheel 11 is rotated to make the locking push rod 10 drive the hemispherical head 8, the locking pin 9, and the locking block 7 to move away from the center rod 1, so that the inclined surface of the locking block 7 is separated from the inclined surface of the slide groove on the center rod 1, the sliding sleeve 2 is relatively separated from the center rod 1, and the sliding sleeve 2 is guided along the slide groove on the center rod 1 to the uppermost position of the slide groove, so that the bracket reaches the maximum expansion state;

[0050] 2. Make sure that the diameter of the reducer cylinder to be supported is within the maximum support diameter range of the bracket.

[0051] 3. Slide the sleeve 2 downward along the center rod 1 so that the radius size of the center of the center rod 1 and the support position of the support block 3 in the top view corresponds to the radius size of the variable diameter cylinder to be supported.

[0052] 4. Under the synchronous action of three sets of hinge parallelogram structures and sliding sleeve connecting rod structures that are evenly arranged in a 120° circle, the three legs 4 and the center rod 1 always maintain parallel movement of the axis, and the radius dimensions of the three support blocks 3 and the center of the center rod 1 in the top view projection can be adaptively adjusted to the radius of the supported cylinder at the same time.

[0053] 5. Rotate the locking wheel 11 to make the locking push rod 10 drive the hemispherical head 8, the locking pin 9, and the locking block 7 to move toward the center rod 1, so that the inclined surface of the locking block 7 presses the inclined surface of the slide groove on the center rod 1, and the sliding sleeve 2 is relatively tightened to the center rod 1. The relative positions of the center rod 1 / sleeve 2 / leg 4 / support block 3 can be quickly locked by fixing the locking block 7 and the slide groove of the center rod 1 with friction force.

[0054] 6. After the bracket completes the support operation for the cylinder, it performs a folding action. The locking wheel 11 is rotated to make the locking push rod 10 drive the hemispherical head 8, the locking pin 9, and the locking block 7 to move away from the center rod 1, so that the inclined surface of the locking block 7 is disengaged from the inclined surface of the slide groove on the center rod 1, the sliding sleeve 2 is relatively disengaged from the center rod 1, and the sliding sleeve 2 is guided along the slide groove on the center rod 1 to the lowermost position of the slide groove, so that the bracket reaches a folded state and is locked.

[0055] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A flexible locking and folding mechanism, comprising a central rod (1) and a supporting leg (4), wherein the central rod (1) and the supporting leg (4) are connected via a locking and folding component. It is characterized in that The locking and folding component comprises a sliding sleeve (2), a short connecting rod (6), a long connecting rod I (5) and a long connecting rod II (12); One end of the long connecting rod I (5) is hingedly connected to the axial upper part of the center rod (1), and the other end is hingedly connected to the axial upper part of the leg (4); one end of the long connecting rod II (12) is hingedly connected to the axial lower part of the center rod (1), and the other end is hingedly connected to the axial lower part of the leg (4); the long connecting rod I (5), the corresponding rod section of the leg (4), the corresponding rod section of the center rod (1) and the long connecting rod II (12) are connected to form a hinged quadrilateral structure; The sliding sleeve (2) is slidingly mounted on the center rod (1); the sliding sleeve (2) slides axially along the center rod (1) to a set position, and the sliding sleeve (2) is locked and fixed on the center rod (1) by a locking member; One end of the short connecting rod (6) is hingedly connected to the long connecting rod I (5), and in the axial direction of the long connecting rod I (5), the hinged connection portion is located between the central rod (1) and the support leg (4); the other end of the short connecting rod (6) is hingedly connected to the sliding sleeve (2); the sliding sleeve (2), the long connecting rod I (5) and the short connecting rod (6) are connected to form a slider connecting rod structure; In a use state, the plurality of legs (4) are arranged around the outer periphery of the central rod (1), and the distance between the legs (4) and the central rod (1) is adjusted by stretching the hinge quadrilateral structure to adjust the radius of the circle surrounded by the plurality of legs (4); the distance between the legs (4) and the central rod (1) is locked by the slider connecting rod structure and the locking member to fix the radius of the circle surrounded by the plurality of legs (4); In the hinged quadrilateral structure, the quadrilateral is a parallelogram; The locking member comprises a locking push rod (10) and a locking block (7); a threaded hole is provided on the side wall of the sliding sleeve (2); an external thread is provided on the rod section of the locking push rod (10) to match the internal thread of the threaded hole; and the locking block (7) is installed at one end of the locking push rod (10); In the locked state, one end of the locking push rod (10) is screwed into the threaded hole, driving the locking block (7) to move toward the center rod (1) until the locking block (7) and the center rod (1) are pressed and contacted, so that the sliding sleeve (2) is fixed on the center rod (1); in the unlocked state, one end of the locking push rod (10) is screwed out of the threaded hole, driving the locking block (7) to be separated from the pressed position of the center rod (1), so that the sliding sleeve (2) can slide on the center rod (1).

2. A flexible locking and folding mechanism according to claim 1, It is characterized in that A sliding groove is provided on the side wall of the center rod (1), and the extension direction of the sliding groove is in the same direction as the axial direction of the center rod (1); in the unlocked state, the locking block (7) slides along the sliding groove of the center rod (1) along with the sliding sleeve (2); in the locked state, the locking block (7) is pressed and contacted with the bottom of the sliding groove, and the locking block (7), the sliding sleeve (2) and the center rod (1) are locked at the same time.

3. A flexible locking and folding mechanism according to claim 2, It is characterized in that The two side walls of the slide groove are inclined structures, the port width of the slide groove is greater than the bottom width, and the slide groove is an inverted isosceles trapezoidal structure in the radial cross-sectional direction of the center rod (1); the side walls of the locking block (7) are provided with symmetrical inclined surfaces adapted to the inclined surfaces of the slide groove; one end of the locking push rod (10) is rotatably connected to the locking block (7), and the axis of rotation coincides with the axis of the locking push rod (10).

4. A bracket, It is characterized in that The invention comprises a support block (3) and a flexible locking and folding mechanism as claimed in any one of claims 1 to 3; a central rod (1) and at least three legs (4) are matched, and all the legs (4) are arranged in a circular ring shape around the central rod (1) with the central rod (1) as the center; a support block (3) is provided on each leg (4), and the support block (3) is used to support the cylinder.

5. A bracket according to claim 4, It is characterized in that It comprises three supporting legs (4), and the three supporting legs (4) are arranged in a circular ring shape with the central rod (1) as the center and at equal intervals in the circumferential direction of the central rod (1).

6. A bracket according to claim 4, It is characterized in that The support block (3) is an L-shaped plate, the horizontal plate of the L-shaped plate is connected to the top of the support leg (4), the horizontal plate of the L-shaped plate is used to contact the bottom of the cylinder to play a supporting role; the vertical plate of the L-shaped plate is used to contact the side wall of the cylinder.

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