Supporting leg assembly and telescopic support

Abstract

The invention discloses a supporting leg assembly and a telescopic support. The supporting leg assembly comprises a pipe set, a first locking mechanism and a driving mechanism. The pipe set comprises a first sleeve and a first telescopic pipe which are connected in a sleeved mode. The first locking mechanism comprises an installation part arranged on the first telescopic pipe, a sliding part in sliding connection with the installation part in the axial direction, and a first locking part connected with the installation part. The driving mechanism comprises a driving piece arranged outside the pipe set, and the driving piece is used for driving the sliding piece to slide relative to the installation piece so that the sliding piece or the installation piece can make contact with or be away from the first locking piece. The first locking piece can generate elastic deformation after being in contact with the sliding piece or the mounting piece, and is in contact with the inner wall of the first sleeve so as to lock the first sleeve and the first telescopic pipe. When the installation piece or the sliding piece is separated from the first locking piece, deformation of the first locking piece is recovered, locking is relieved, the whole locking and unlocking process can be controlled by an external driving piece, and rapid switching is achieved.

Description

Technical Field

[0001] The present application relates to the field of brackets, and in particular to a support leg assembly and a telescopic bracket. Background Art

[0002] A support is a structure that supports the camera. It is widely used and can be found everywhere in work and life, such as a camera tripod and a measuring instrument stand. Taking a camera tripod or monopod as an example, the support is used to stabilize the camera to achieve certain photographic effects. The positioning of the tripod is very important. Generally, people tend to ignore the importance of a tripod when using a digital camera to take pictures. In fact, photo shooting often requires the help of a tripod, such as star trail shooting, water shooting, night scene shooting, macro shooting, etc. Its main function is to stabilize the camera to achieve a certain photographic effect. Existing camera tripods are usually externally adjusted and locked, such as by tightening the retractable branch pipe with screws or ring sleeves, which is troublesome to operate. Summary of the invention

[0003] The present application proposes a support leg assembly and a telescopic bracket, which can solve the problem of inconvenient operation of locking the telescopic tube from the outside.

[0004] The present application proposes a support foot assembly, comprising:

[0005] A tube assembly, comprising a first sleeve and a first telescopic tube sleeved with the first sleeve;

[0006] A first locking mechanism comprises a mounting member provided on the first telescopic tube, a sliding member slidably connected to the mounting member along the axial direction, and a first locking member provided on the sliding member;

[0007] A driving mechanism, comprising a driving member disposed outside the tube assembly, the driving member being used to drive the sliding member to slide relative to the mounting member so that the mounting member contacts or moves away from the first locking member;

[0008] The first locking member can be elastically deformed when in contact with the mounting member, and contact with the inner wall of the first sleeve to lock the first sleeve and the first telescopic tube.

[0009] In some embodiments, the mounting member includes a first piston cylinder, the sliding member includes a first piston adapted to the first piston cylinder, and a first piston rod provided on the first piston, and the first piston cylinder is connected to the driving member.

[0010] In some embodiments, a channel communicating with the first piston cylinder is provided inside the first piston rod, and the driving mechanism further includes a connecting pipe received in the first sleeve, and the connecting pipe is used to connect the driving member and the channel.

[0011] In some embodiments, the tube set further includes a second telescopic tube disposed in the first telescopic tube, and the second telescopic tube is slidably connected to the first telescopic tube along the axial direction;

[0012] The support leg assembly further comprises a second locking mechanism disposed at one end of the tube assembly away from the first locking mechanism, the second locking mechanism being used to lock or unlock the second telescopic tube; the first locking mechanism is linked to the second locking mechanism.

[0013] In some embodiments, one end of the sliding member away from the first locking member is a connecting end, and the connecting end is located outside the mounting member and is used to connect with the second locking mechanism.

[0014] In some embodiments, the connecting end extends into the second telescopic tube, and the second locking mechanism includes a sac disposed at the connecting end, the sac is in communication with the driving member, and the sac can expand to lock the second telescopic tube.

[0015] In some embodiments, the tube group also includes a transmission tube arranged between the second telescopic tube and the first telescopic tube, and the second telescopic tube is connected to the transmission tube in an axially sliding manner; a connecting piece is provided at the connecting end, the transmission tube is fixedly connected to the connecting piece, and the end away from the connecting piece is connected to the second locking mechanism.

[0016] In some embodiments, the second locking mechanism further comprises:

[0017] A second locking member, disposed at an end of the first telescopic tube away from the first locking mechanism;

[0018] A second pushing member is disposed at an end of the transmission tube away from the first locking mechanism;

[0019] The second pushing member can dock with the second locking member, so that the second locking member undergoes elastic deformation and contacts with the outer wall of the second telescopic tube, so as to lock the first telescopic tube and the second telescopic tube.

[0020] In some embodiments, the support leg assembly further includes a limit assembly connecting the first telescopic tube and the transmission tube, and the limit assembly is used to limit the travel of the first telescopic tube and the transmission tube when they slide relative to each other.

[0021] In some embodiments, the driving mechanism further comprises an elastic member elastically connected to the mounting member, the elastic force of the elastic member is used to reset the mounting member and lock the first locking member, the elastic member is located in the first piston cylinder, and one end of the elastic member is connected to the first piston, and the other end is connected to the inner cylinder wall of the first piston cylinder; or

[0022] The elastic member is located outside the mounting member and is supported by the bottom end of the mounting member.

[0023] The present application also proposes a support foot assembly, comprising:

[0024] A tube assembly, comprising a first sleeve and a first telescopic tube sleeved with the first sleeve;

[0025] A first locking mechanism comprises a mounting member provided on the first telescopic tube, a sliding member slidably connected to the mounting member along the axial direction, a first locking member provided on the mounting member, and a first pushing member provided on the sliding member;

[0026] A driving mechanism, comprising a driving member disposed outside the tube assembly, the driving member being used to drive the sliding member to slide relative to the mounting member so that the first pushing member contacts or moves away from the first locking member;

[0027] The first locking member can be elastically deformed when contacting the first pushing member, and contact the inner wall of the first sleeve to lock the first sleeve and the first telescopic tube.

[0028] In some embodiments, the mounting member includes a first piston cylinder, the sliding member includes a first piston adapted to the first piston cylinder and a first piston rod provided on the first piston, the first piston cylinder is connected to the driving member, and a channel connected to the first piston cylinder is provided inside the first piston rod, and the driving mechanism also includes a connecting pipe accommodated in the first sleeve, and the connecting pipe is used to connect the driving member and the channel.

[0029] In some embodiments, the tube set further includes a second telescopic tube disposed in the first telescopic tube, and the second telescopic tube is slidably connected to the first telescopic tube along the axial direction;

[0030] The support leg assembly further comprises a second locking mechanism disposed at one end of the tube assembly away from the first locking mechanism, the second locking mechanism being used to lock or unlock the second telescopic tube; the first locking mechanism is linked to the second locking mechanism.

[0031] In some embodiments, the end of the sliding member away from the first locking member is a connecting end, and the connecting end is located outside the mounting member. The tube group also includes a transmission tube arranged between the second telescopic tube and the first telescopic tube, and the second telescopic tube is connected to the transmission tube along an axial sliding connection; the connecting end is provided with a connecting member, the transmission tube is fixedly connected to the connecting member, and the end away from the connecting member is connected to the second locking mechanism.

[0032] In some embodiments, the second locking mechanism further comprises:

[0033] A second locking member, disposed at an end of the first telescopic tube away from the first locking mechanism;

[0034] A second pushing member is disposed at an end of the transmission tube away from the first locking mechanism;

[0035] The second pushing member can dock with the second locking member, so that the second locking member undergoes elastic deformation and contacts with the outer wall of the second telescopic tube, so as to lock the first telescopic tube and the second telescopic tube.

[0036] The present application also proposes a telescopic bracket, comprising a mounting seat and the above-mentioned supporting leg assembly, wherein the pipe group is rotatably arranged on the mounting seat, and the driving member is arranged on the mounting seat.

[0037] In some embodiments, the driving member includes a second piston cylinder disposed on the mounting seat, a second piston adapted to the second piston cylinder, and a second piston rod disposed on the second piston, and the second piston cylinder is connected to the channel of the first piston cylinder through the connecting pipe;

[0038] The driving mechanism also includes a handle disposed on the mounting seat, the handle being used to pull the second piston rod to move to unlock the first sleeve and the first telescopic tube, and the second piston rod is driven to reset the handle to lock the first sleeve and the first telescopic tube when resetting.

[0039] In some embodiments, the telescopic bracket includes at least three supporting leg assemblies, and the driving member is used to drive each of the supporting leg assemblies to be locked or unlocked synchronously.

[0040] The present application proposes a support foot assembly and a telescopic bracket, wherein the support foot assembly includes a tube group, a first locking mechanism and a driving mechanism. The tube group includes a first sleeve tube and a first telescopic tube; the first locking mechanism includes a mounting member provided on the first telescopic tube, a sliding member connected to the mounting member along an axial sliding manner, and a first locking member connected to the mounting member; the driving mechanism includes a driving member provided outside the tube group, the driving member is used to drive the sliding member to slide relative to the mounting member, so that the sliding member or the mounting member contacts or moves away from the first locking member; the first locking member can be elastically deformed after contacting the sliding member or the mounting member, and contacts the inner wall of the first sleeve tube to lock the first sleeve tube and the first telescopic tube. When the mounting member or the sliding member is separated from the first locking member, the deformation of the first locking member is restored and the lock is released, and the first sleeve tube and the first telescopic tube can slide telescopically, and the entire locking and unlocking process can be controlled by an external driving member, and rapid switching can be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 This is a schematic diagram of the structure of a telescopic bracket in one embodiment of the present application;

[0042] Figure 2 A cross-sectional view of a support leg assembly in one embodiment of the present application;

[0043] Figure 3 This is a structural schematic diagram of a first locking mechanism in an embodiment of the present application;

[0044] Figure 4 This is a schematic diagram of the structure of the tube group and the second locking mechanism in one embodiment of the present application;

[0045] Figure 5 A cross-sectional view of a support leg assembly in another embodiment of the present application;

[0046] Figure 6 This is a schematic diagram of the structure of a driving mechanism in one embodiment of the present application;

[0047] Figure 7 This is a working principle diagram of the driving mechanism and the first locking mechanism during the locking operation in one embodiment of the present application;

[0048] Figure 8 This is a working principle diagram of the driving mechanism and the first locking mechanism during unlocking operation in one embodiment of the present application.

[0049] The purpose, features and advantages of this application will be further described in conjunction with the embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0050] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the scheme in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments in the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0051] It should be noted that all directional indications such as up, down, left, right, front, back... in the embodiments of the present application are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture as shown in the accompanying drawings. If the specific posture changes, the directional indication will also change accordingly.

[0052] It should also be noted that when an element is referred to as being "fixed on" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element at the same time. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element at the same time.

[0053] In addition, the descriptions of "first", "second", etc. in this application are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0054] This application proposes a support foot assembly, referring to Figures 1 to 3 The supporting foot assembly includes: a tube group 10, including a first sleeve 11 and a first telescopic tube 12 sleeved with the first sleeve 11; a first locking mechanism 20, including a mounting member 21 provided on the first telescopic tube 12, a sliding member 22 axially slidably connected to the mounting member 21, and a first locking member 23 connected to the first telescopic tube 12; a driving mechanism 5, including a driving member 52 provided outside the tube group 10, the driving member 52 is used to drive the sliding member 22 to slide relative to the mounting member 21, so that the sliding member 22 or the mounting member 21 contacts or moves away from the first locking member 23; the first locking member 23 can be elastically deformed after contacting the sliding member 22 or the mounting member 21, and contacts with the inner wall of the first sleeve 11 to lock the first sleeve 11 and the first telescopic tube 12.

[0055] In this embodiment, the above-mentioned sleeve connection means that the first sleeve 11 is sleeved on the outside of the first telescopic tube 12. The two can slide along the axial direction. The first locking mechanism 20 is arranged in the first sleeve 11 and can be arranged at the end of the first telescopic tube 12. The mounting member 21 and the sliding member 22 can adopt the structure of a hydraulic cylinder or a pneumatic cylinder, and the hydraulic cylinder or the pneumatic cylinder includes a cylinder body and a push rod slidably connected to the cylinder body. The mounting member 21 serves as the cylinder body, the sliding member 22 serves as the push rod, and the driving member 52 can be a hydraulic cylinder or a pneumatic cylinder arranged on the outside, and the cylinder body of the external hydraulic cylinder is connected to the cylinder body of the hydraulic cylinder inside the pipe group 10 through the connecting pipe 51.

[0056] Further references Figure 7 , the external hydraulic cylinder works in the positive direction, and its push rod moves to the left. The medium in the left cavity of the external hydraulic cylinder is transferred to the left cavity of the internal hydraulic cylinder, and pushes the push rod of the internal hydraulic cylinder to move to the right, so that the mounting member 21 contacts the first locking member 23, the first locking member 23 undergoes elastic deformation, and contacts the inner wall of the first sleeve 11. Under the action of friction, the first locking member 23 and the first sleeve 11 remain locked.

[0057] Further references Figure 8, the external hydraulic cylinder performs work in the opposite direction, and its push rod moves to the right. The medium in the right cavity of the external hydraulic cylinder is transferred to the right cavity of the internal hydraulic cylinder, and pushes the push rod of the internal hydraulic cylinder to move to the left, so that the mounting member 21 is separated from the first locking member 23, the deformation of the first locking member 23 is restored and the lock is released, and the first sleeve 11 and the first telescopic tube 12 can be telescopically slidable. The entire locking and unlocking process can be controlled by the external driving member 52, and rapid switching can be achieved.

[0058] Of course, the internal hydraulic cylinder body can also be provided with an external liquid storage bag for thermal expansion and contraction adjustment, that is, when the ambient temperature is too high or too low, the pressure of the internal hydraulic cylinder body is compensated to a certain extent to avoid cylinder explosion or perform pressure compensation.

[0059] In some embodiments, reference Figures 1 to 3 , the mounting member 21 includes a first piston cylinder (i.e., the cylinder body of the internal pneumatic cylinder), the sliding member 22 (i.e., the push rod of the internal pneumatic cylinder) includes a first piston adapted to the first piston cylinder and a first piston rod provided on the first piston, and the first piston cylinder is connected to the driving member 52. In this embodiment, the mounting member 21 and the sliding member 22 can adopt the structure of a pneumatic cylinder, and the corresponding external driving member 52 can also be a pneumatic cylinder. When work is done on the external pneumatic cylinder, the pressure in the cylinder increases and is transmitted to the internal pneumatic cylinder. The internal first piston push rod moves under the influence of the pressure to push the first piston rod to move, causing the first locking member 23 to deform and complete the locking. When the work done on the external pneumatic cylinder is canceled, the compressed air pressure in the internal pneumatic cylinder decreases, causing the piston of the internal pneumatic cylinder to rebound to release the lock.

[0060] Furthermore, a channel 221 communicating with the first piston cylinder is provided inside the first piston rod, and the driving mechanism 5 further includes a connecting pipe 51 received in the first sleeve 11, and the connecting pipe 51 is used to connect the driving member 52 and the channel 221. In this embodiment, one end of the first piston rod extends out of the first piston cylinder, a deep hole is provided inside the first piston rod, and a connecting hole communicating with the deep hole and the inside of the first piston cylinder is also provided on the side wall of the first piston rod, and the deep hole and the connecting hole constitute the above-mentioned channel 221. The connecting pipe 51 is inserted into the opening of the deep hole at the end of the first piston rod through a joint. It is worth noting that the inside of the first piston cylinder is not limited to adopting pneumatic transmission, and a hydraulic transmission method can also be adopted. The other end of the connecting pipe 51 is connected to an external hydraulic cylinder or pneumatic cylinder. The external hydraulic cylinder or pneumatic cylinder can work on the internal hydraulic cylinder or pneumatic cylinder by manual drive or electric drive.

[0061] The connecting tube 51 can be a spiral tube, and when the first sleeve 11 and the first telescopic tube 12 are unlocked and slide to make the tube set 10 as a whole longer, the spiral tube will be stretched accordingly. When the tube set 10 is shortened, the spiral tube can be retracted accordingly to ensure that the connecting tube 51 will not be scattered inside the first sleeve 11.

[0062] In some embodiments, reference Figures 1 to 3 , the first locking member 23 is arranged at one end of the piston rod outside the piston cylinder, and the first locking member 23 can be sleeved on the outer periphery of the piston cylinder; when the first locking member 23 is docked with the piston cylinder, the first locking member 23 can expand radially and abut against the inner wall of the first sleeve 11. In this embodiment, the first locking member 23 can be arranged in a cover shape, specifically including a connecting portion 231 and a deforming portion 232 arranged around the outer peripheral edge of the connecting portion 231; the end of the piston rod is connected to the center of the connecting portion 231, and the outer wall of the piston cylinder facing the end of the first locking member 23 is provided with a certain taper to form an expansion portion 213. When the deformation portion 232 is docked with the expansion portion 213 of the piston cylinder, as the docking depth of the two increases, the deformation portion 232 will be enlarged and expanded outward to contact the inner wall of the first sleeve 11, and the section where the deformation portion 232 contacts the inner wall of the first sleeve 11 is the locking portion 233. When the deformation portion 232 is separated from the expansion portion 213, the elastic deformation of the deformation portion 232 is restored, and the locking is released. The locking deformation of the first locking member 23 is completed by docking with the piston cylinder without relying on other components, and the internal structure of the pipe group 10 is more compact.

[0063] In addition, refer to Figure 5 , the first locking member 23 can also be arranged on the piston cylinder, and the sliding member 22 also includes a first pushing member 24 arranged at one end of the piston rod outside the piston cylinder; when the first pushing member 24 is docked with the first locking member 23, the first locking member 23 can expand radially and abut against the inner wall of the first sleeve 11. In this embodiment, the first locking member 23 is arranged on the piston cylinder, and its specific structure is also in the shape of a cover, and includes a connecting portion 231 and a deforming portion 232. The connecting portion 231 is arranged on the piston cylinder, and the deforming portion 232 extends outward toward the end away from the piston cylinder. The above-mentioned first pushing member 24 can adopt a frustum, and its function is similar to that of the expansion portion 213, which is used to push the deforming portion 232 to deform and abut against the inner wall of the first sleeve 11 to form a lock.

[0064] Further references Figure 2In order to prevent the first telescopic tube 12 from escaping from the lower end of the first sleeve 11, a first stopper 42 may be provided at the lower end of the first sleeve 11. The first stopper 42 is sleeved on the end of the first sleeve 11, and the end extends inward to form a circle of flange. A second stopper 41 is also provided between the first sleeve 11 and the first telescopic tube 12. The second stopper 41 may be a first arc-shaped piece installed on the outer periphery of the first telescopic tube 12. A stopper hole 121 is provided on the first telescopic tube 12, and a protrusion adapted to the stopper hole 121 is provided on the inner side of the first arc-shaped piece. The stopper hole 121 serves to fix the first arc-shaped piece. The material of the second stopper 41 may be Teflon, which has a self-lubricating effect. When the first telescopic tube 12 is fully extended, the first arc-shaped piece contacts the flange at the end of the first stopper 42, and the flange is used to limit the first telescopic tube 12 and the first arc-shaped piece from escaping from the first sleeve 11.

[0065] In some embodiments, reference Figures 2 to 4 The tube set 10 further includes a second telescopic tube 14 disposed in the first telescopic tube 12, and the second telescopic tube 14 is slidably connected to the first telescopic tube 12 along the axial direction; the support foot assembly further includes a second locking mechanism 30 disposed at one end of the tube set 10 away from the first locking mechanism 20, and the second locking mechanism 30 is used to lock or unlock the second telescopic tube 14; the first locking mechanism 20 is linked to the second locking mechanism 30. The linkage of the first locking mechanism 20 and the second locking mechanism 30 can realize the synchronous locking and unlocking of the first telescopic tube 12 and the second telescopic tube 14, so that the support foot assembly has the function of one-key unlocking or one-key locking.

[0066] Specifically, refer to Figure 5 , the end of the sliding member 22 away from the first locking member 23 is the connecting end, and the sliding member 22 is arranged through the mounting member 21, that is, the first piston rod is arranged through the first piston cylinder. The end of the first piston rod away from the first locking member 23 is or the connecting end. The connecting end is located outside the mounting member 21 and extends into the second telescopic tube 14; the second locking mechanism 30 includes a capsule 34 arranged at the connecting end, and is connected with the capsule 34 and the channel, and the capsule 34 can expand and lock the second telescopic tube. In this embodiment, the deep hole in the mounting member 21 can extend to the connecting end and be connected with the capsule 34. The hydraulic cylinder or pneumatic cylinder outside is driven by an external force, and its internal pressure increases and transmits the medium to the first piston cylinder and the capsule 34, and the capsule 34 expands and contacts the second telescopic tube 14, and completes the locking of the second telescopic tube 14.

[0067] Of course, the second locking mechanism 30 can also adopt an external locking method in addition to using the built-in capsule 34 for internal locking. The external locking method is as follows:

[0068] In some embodiments, reference Figures 1 to 4 The tube assembly 10 further includes a transmission tube 13 disposed in the first telescopic tube 12, and a second telescopic tube 14 disposed in the transmission tube 13. The transmission tube 13 is respectively connected to the first telescopic tube 12 and the second telescopic tube 14 in an axial sliding manner; a connecting member 16 is provided at the connecting end, and the transmission tube 13 is connected to the connecting member 16. The transmission tube 13 is fixedly connected to the sliding member 22 through the connecting member 16, so that the transmission tube 13 can slide synchronously with the first telescopic tube 12 in the first sleeve 11. The second telescopic tube 14 slides in the transmission tube 13, so that the support assembly has a two-stage telescopic function. The second locking mechanism 30 can be disposed at the end of the transmission tube 13 away from the connecting member 16, and the movement of the sliding member 22 is transmitted to the second locking mechanism 30, so that the two sets of locking mechanisms can be locked and unlocked synchronously.

[0069] like Figure 2 As described above, the connecting member 16 can be a disc member, the circumferential outer side wall of the disc member is fixedly connected to the inner side wall of the upper end of the transmission tube 13, and the sliding member 22 is screwed to the central area of ​​the disc member, which is convenient for installation and stable in structure. Of course, part or all of the sliding member 22 can be integrally formed with the connecting member 16, or the connecting member 16 can be integrally formed with the transmission tube 13. The sliding member 22 can be composed of multiple parts or integrally formed, which is not limited here. In short, the connecting member 16 is used to connect the sliding member 22 and the transmission tube 13, and the specific shape is not limited, as long as the function is achieved.

[0070] Specifically, the second locking mechanism 30 can also adopt a locking method similar to the elastic deformation of the first locking member 23, and the upper end of the transmission tube 13 can be fixedly connected to the sliding member 22, such as threaded connection, and the lower end of the transmission tube 13 is connected to the second locking mechanism 30. When the driving mechanism 5 drives the sliding member 22 to slide and lock the first sleeve 11 and the first telescopic tube 12, the second locking mechanism 30 can be locked due to the transmission effect of the transmission tube 13, so that the second locking mechanism 30 is linked with the first locking mechanism 20 to achieve synchronous locking and synchronous unlocking.

[0071] Reference Figure 3 The second locking mechanism 30 may specifically include: a second locking piece, which is arranged at one end of the first telescopic tube 12 away from the first locking mechanism 20; a second pushing piece 33, which is arranged at one end of the transmission tube 13 away from the first locking mechanism 20; the second pushing piece 33 can dock with the second locking piece, and cause the second locking piece to undergo elastic deformation and contact with the outer wall of the second telescopic tube 14 to lock the first telescopic tube 12, the transmission tube 13 and the second telescopic tube 14.

[0072] In this embodiment, the second locking member includes a mounting sleeve 31 disposed at the end of the first telescopic tube 12, and a locking sleeve 32 disposed in the mounting sleeve 31. The locking sleeve 32 extends from the end of the mounting sleeve 31 to the inside of the locking sleeve 32. The second telescopic tube 14 can slide inside the locking sleeve 32. There is a certain gap between the mounting sleeve 31 and the locking sleeve 32. The second pusher 33 can follow the transmission tube 13 to move along the axis in the above gap. The second pusher 33 can also be set in a ring shape, and its cross section is wedge-shaped. When the second pusher 33 is pushed into the above gap, it can push the locking sleeve 32 to deform and clamp the second telescopic tube 14 to complete the locking. Of course, the second pusher 33 is also fixed in the above gap, and the lower end of the first telescopic tube 12 is also locked with the lower end of the transmission tube 13. When the second pusher 33 is away from the locking sleeve 32, the elastic deformation of the locking sleeve 32 is restored, and the locking state between the first telescopic tube 12, the transmission tube 13 and the second telescopic tube 14 is released.

[0073] It is worth noting that in order to prevent the second telescopic tube 14 from escaping from the lower end of the transmission tube 13, a fourth limiter can be provided at the lower end of the first telescopic tube 12, and the locking sleeve 32 can be used as the fourth limiter to play a limiting role. A third limiter is also provided between the transmission tube 13 and the second telescopic tube 14. The third limiter can be a second arc-shaped piece installed on the outer periphery of the second telescopic tube 14. The second telescopic tube 14 is provided with a mounting hole, and a protrusion adapted to the mounting hole is provided on the inner side of the second arc-shaped piece. The material of the third limiter can be Teflon, which has a self-lubricating effect. When the second telescopic tube 14 is fully extended, the second arc-shaped piece contacts the end of the locking sleeve 32, and the locking sleeve 32 can be used to limit the second telescopic tube 14 and the second arc-shaped piece from escaping from the transmission tube 13.

[0074] Of course, since the first telescopic tube 12 and the transmission tube 13 are connected through the internal hydraulic cylinder and the rear pneumatic cylinder, the stroke of the transmission tube 13 is limited by the stroke of the sliding member 22. However, in the event of failure of the internal hydraulic cylinder or the pneumatic cylinder, the transmission tube 13 may be detached from the first telescopic tube 12, so a limiting assembly is also required to limit the two. The limiting assembly is used to limit the stroke of the first telescopic tube 12 and the transmission tube when they slide relative to each other. Specifically, the limiting assembly includes the above-mentioned first arc-shaped sheet. A strip hole extending axially is provided on the transmission tube, and the strip hole corresponds to the limiting hole 121. The protrusion on the first arc-shaped sheet passes through the limiting hole 121 and extends into the strip hole, and can slide in the strip hole, thereby achieving the purpose of limiting the sliding stroke of the first telescopic tube 12 and the transmission tube 13.

[0075] In some embodiments, reference Figure 2, an elastic member (not shown) can also be provided on the internal hydraulic cylinder, and the elastic force of the elastic member causes the push rod of the internal hydraulic cylinder to move in the positive direction, so that the mounting member 21 contacts the first locking member 23, the first locking member 23 is elastically deformed, and contacts the inner wall of the first sleeve 11, and under the action of friction, the first telescopic tube 12 connected to the first locking member 23 and the first sleeve 11 remain in a locked state. At this time, the elastic force of the elastic member maintains the above-mentioned locked state.

[0076] When unlocking is required, the external hydraulic cylinder is driven to make the push rod of the internal hydraulic cylinder move in the opposite direction, the elastic member is compressed, and the push rod drives the first locking member 23 to separate from the mounting member 21. The elastic deformation of the first locking member 23 is restored and separated from the inner wall of the first sleeve 11, and the first telescopic tube 12 connected to the first locking member 23 is released from the lock of the first sleeve 11.

[0077] Furthermore, the first piston can separate the inner cavity of the first piston cylinder into two chambers, one of which is a working chamber 211 connected to the external hydraulic cylinder, and the other is a mounting chamber 212 for mounting the elastic member. In addition, the elastic member can also be arranged between the connecting member 16 and the mounting member 21. One end of the elastic member abuts against the mounting member 21, and the other end abuts against the connecting member 16. A mounting groove is concavely provided on a side of the connecting member 16 facing the mounting member 21 to accommodate the positioning elastic member.

[0078] The present application also proposes a telescopic bracket, referring to Figures 1 to 6 The telescopic bracket includes a mounting base 6 and the above-mentioned supporting leg assembly, and the number of the supporting leg assembly is at least one group, such as a monopod, a tripod, etc. The tube group 10 is rotatably arranged on the mounting base 6, and the driving member 52 is arranged on the mounting base 6. In this embodiment, multiple groups of supporting leg assemblies can be arranged, and the first locking mechanism 20 of each group of supporting leg assemblies is connected to the driving member 52. The driving member 52 can drive multiple groups of first locking mechanisms 20 to work together, thereby achieving synchronous locking or synchronous unlocking. In practical applications, the telescopic bracket can be a tripod, and the tube group 10 serves as the telescopic leg of the tripod.

[0079] In the initial state, the first telescopic tube 12 is accommodated in the first sleeve 11, and under the action of the elastic member, the mounting member 21 and the first locking member 23 are in contact, the first locking member 23 is elastically deformed and contacts the inner wall of the first sleeve 11, and the first telescopic tube 12 is locked.

[0080] When the tube assembly 10 needs to be extended, the driving member 52 can be worked, and the driving member 52 drives the sliding member 22 and the mounting member 21 to move relative to each other, so that the mounting member 21 is separated from the first locking member 23, and the first telescopic tube 12 is unlocked. Under the action of gravity, the first telescopic tube 12 can slide off the first sleeve 11.

[0081] In the unlocked state, the height and pitch angle of the mounting base 6 can be adjusted, and the three first telescopic tubes 12 can automatically fall down and contact the ground, and the extended length of each can just maintain the above-mentioned height and pitch angle.

[0082] After adjusting the height and pitch angle, the external force acting on the driving member 52 is removed, and the elastic force of the elastic member can drive the sliding member 22 to move downward and reset. At this time, the first locking member 23 contacts the mounting member 21 again and undergoes elastic deformation to lock the first telescopic tube 12.

[0083] The external hydraulic cylinder can be connected to the three internal hydraulic cylinders through the flow divider. When external force is applied to the external hydraulic cylinder to do work, the three pipe groups 10 can be unlocked synchronously. After the external force is removed, the three pipe groups 10 are also locked synchronously under the action of the elastic member. The entire adjustment process is quick and convenient, and there is no need to operate each pipe group 10 separately.

[0084] It can be understood that when the bracket needs to be retracted, the external hydraulic cylinder can be worked first, each pipe group 10 can be unlocked synchronously, and the mounting seat 6 can be slowly lowered until all the pipe groups 10 are completely retracted, and then the force working on the external hydraulic cylinder can be removed, and all the pipe groups 10 can be locked again.

[0085] The previous embodiment adopts a one-stage telescopic structure, that is, only the first sleeve 11 and the first telescopic tube 12 are telescopic. When the support leg assembly and the telescopic bracket are a two-stage telescopic structure, the transmission tube 13 and the second telescopic tube 14 can also be telescopic. When an external force is applied to the external hydraulic cylinder to do work, its push rod moves relative to the cylinder body, driving the driving slide 22 to move upward, the first locking mechanism 20 and the second locking mechanism 30 are unlocked, the first telescopic tube 12 and the transmission tube 13 are synchronously extended from the first sleeve 11, and the second telescopic tube 14 is extended from the transmission tube 13. After the height and pitch angle adjustment of the mounting seat 6 are completed, the external force applied to the external hydraulic cylinder is removed, the elastic member drives the slide 22 to move downward and retract, the first locking mechanism 20 locks the first sleeve 11 and the first telescopic tube 12, and the second locking mechanism 30 locks the transmission tube 13 and the second telescopic tube 14.

[0086] In addition, in the above-mentioned first-level telescopic structure and second-level telescopic structure, the sleeve may be in direct contact with the ground or indirect contact with the ground through some intermediate parts. The above-mentioned intermediate parts may be a support seat arranged at the end of the first telescopic tube 12 or the end of the second telescopic tube 14.

[0087] It is worth noting that a connecting seat 15 is also provided at the end of the first sleeve 11 , and the end of the connecting seat 15 away from the first sleeve 11 is hinged to the mounting seat 6 , and the spiral tube is arranged in the first sleeve 11 , located in the area between the connecting seat 15 and the first locking member 23 .

[0088] Further references Figure 6The driving mechanism 5 further includes a grip 53 and a movable handle 54. The movable handle 54 is arranged on the grip 53 and is hinged to the grip 53. The grip 53 is arranged on the mounting seat 6. An external hydraulic cylinder or pneumatic cylinder is arranged in the grip 53. The driving member 52 includes a second piston cylinder 521, a second piston 522 arranged in the second piston cylinder 521, and a second piston rod 523 connected to the second piston 522. The second piston rod 523 and the second piston 522 constitute a second push rod. By moving the movable handle 54, the external hydraulic cylinder can be worked, that is, the second piston rod 523 can be pushed to move, so as to manually control the locking state of the supporting foot assembly.

[0089] Specifically, the movable handle 54 is arranged on one side of the grip 53, and a push fork 55 is provided on the side of the movable handle 54 close to the grip 53. A limit plate 524 is provided at the free end of the second piston rod 523. When the user grips the movable handle 54 and the grip 53, the movable handle 54 moves toward the grip 53. At this time, the gripping force applied from the outside works on the external hydraulic cylinder. The movable handle 54 can push the push fork 55 to resist against the limit plate 524, and push the limit plate 534 to move, thereby driving the second piston rod 523 to extend outward to complete the unlocking operation.

[0090] When the external force applied to the movable handle 54 is removed, the return spring 525 in the external hydraulic cylinder pushes the second piston rod 523 to return and retract, so that the movable handle 54 and the push fork 55 are away from the limit plate 524, thereby completing the locking operation. Of course, the elastic member in the internal hydraulic cylinder can also assist in locking and shorten the reaction time of the locking process.

[0091] In order to prevent the movable handle 54 from being accidentally touched or the locking state from being destroyed, a locking member 57 (not shown in the figure) can also be provided on the grip 53 to lock the grip 53. The grip 53 is hinged to the mounting seat 6. After pressing or starting the locking member 57, the grip 53 rotates around the mounting seat 6 and is stored in a preset position, that is, it is close to the axial center of the mounting seat 6 to form a shooting avoidance space. After the grip 53 rotates around the mounting seat 6 to reset, the locking member can automatically reset and re-lock the grip 53.

[0092] The second piston cylinder 521 is connected to the connecting pipe 51 of the first piston cylinder through the conduit 56. It is worth noting that when multiple sets of supporting leg assemblies are arranged on the mounting seat 6, the conduit 56 of the external hydraulic cylinder or pneumatic cylinder can be connected to each connecting pipe 51 through a diverter to achieve synchronous locking and unlocking of multiple sets of supporting leg assemblies. The term "external" in the external pneumatic cylinder and the external hydraulic cylinder is relative to the pipe group 10, that is, it is arranged outside the pipe group 10.

[0093] In the embodiment of the present application, the working principle of the support leg assembly and the telescopic bracket is as follows. The mounting member 21, the sliding member 22 and the driving member are all described below using a hydraulic cylinder and a telescopic bracket having three sets of support leg assemblies as an example:

[0094] Before using the telescopic bracket, all the pipes in the pipe group 10 are completely accommodated, the pipe group 10 is completely locked, and the handle 53 is close to the pipe group 10. Under the action of the elastic member and the return spring, the second piston rod 523 is in a downwardly extended state, the mounting member 21 is in a contact state with the first locking member 23, the first locking member 23 is elastically deformed, and contacts the inner wall of the first sleeve 11, and the first telescopic tube 12 is locked. The second pusher 33 docks with the second locking member, and causes the second locking member to be elastically deformed and contact the outer wall of the second telescopic tube 14, so as to lock the first telescopic tube 12, the transmission tube 13, and the second telescopic tube 14.

[0095] The handle 53 is rotated around the mounting seat 6 to the initial position away from the tube group 10, and the locking member 57 resets the locking handle 53, which is convenient for the user to operate the movable handle 54. When the movable handle 54 and the handle 53 are gripped, the movable handle 54 moves toward the handle 53. At this time, the gripping force applied from the outside works on the external hydraulic cylinder. The movable handle 54 can push the push fork 55 to abut against the limit plate 524, and push the limit plate 534 to move, thereby driving the second piston rod 523 to extend outward. The hydraulic pressure change of the external hydraulic cylinder is transmitted to the internal hydraulic cylinder through the connecting pipes 51 connected by the conduit 56, causing the internal hydraulic pressure to change. The hydraulic pressure change of the internal hydraulic cylinder drives the first piston rod (sliding member 22) of the internal hydraulic cylinder to extend upward. As a result, the first locking member 23 is driven away from the mounting member 21, the elastic deformation of the first locking member 23 is restored, and it is separated from the inner wall of the first sleeve 11, and the locking of the first telescopic tube 12 and the first sleeve 11 provided on the mounting member 21 is released.

[0096] At the same time, since the upward extension movement of the sliding member 22 drives the transmission tube 13 to move upward, the transmission tube 13 can drive the second pushing member 33 to separate from the second locking member (31, 32), the elastic deformation of the second locking member is restored, and separated from the outer wall of the second telescopic tube 14, and the first telescopic tube 12, the transmission tube 13 and the second telescopic tube 14 are also completely unlocked.

[0097] After all the tube groups 10 are fully unlocked synchronously, the first telescopic tube 12 and the second telescopic tube 14 will automatically extend downward and contact the ground or contact the ground first. By stretching each tube group 10 upward, after adjusting the height and pitch angle of the mounting seat 6, the extension length of each of the three tube groups 10 can just maintain the above height and pitch angle. At this time, the grip on the movable handle 54 and the grip can be removed, and the return spring 525 in the external hydraulic cylinder pushes the second piston rod 523 to return and retract, so that the movable handle 54 and the push fork 55 are away from the limit plate 524, thereby completing the locking operation. Of course, the elastic member located in the internal hydraulic cylinder can also assist in locking.

[0098] The locking process of the tube set 10 is the reverse process of the unlocking of the tube set 10. During the locking process of the tube set 10, the second piston rod 523 retracts, driving the sliding member 22 (first piston rod) to retract downward, and the first locking member 23 approaches the first pushing member 24 or the mounting member 21. The first locking member 23 radially expands and contacts the first telescopic tube 12 to complete the locking of the first telescopic tube 12 and the first sleeve 11.

[0099] The second pusher 33 moves with the transmission tube 13 and the sliding member 22 and pushes the second locking member to deform, thereby clasping the second telescopic tube. The lower ends of the first telescopic tube 12 and the second telescopic tube and the transmission tube are also locked.

[0100] In order to prevent the movable handle 54 from being accidentally touched or the locking state from being destroyed, after pressing or starting the locking member 57, the grip 53 is moved to rotate around the mounting base 6 and stored in a preset position, that is, close to the axial center of the mounting base 6 to form a shooting avoidance space.

[0101] When the tube set 10 needs to be stored or the telescopic length of the tube set 10 needs to be readjusted after the shooting task is completed, the grip 53 and the movable handle 54 can be tightly grasped to completely unlock the tube set 10. After the storage or length adjustment is completed, the grip 53 and the movable handle 54 are released, and the tube set 10 is locked again.

[0102] The above are only partial or preferred embodiments of the present application. Neither the text nor the drawings can limit the scope of protection of the present application. All equivalent structural changes made using the contents of the present application specification and drawings under the overall concept of the present application, or direct / indirect application in other related technical fields are included in the scope of protection of the present application.

Claims

1. A support leg assembly, characterized in that: include: A tube assembly, comprising a first sleeve and a first telescopic tube sleeved with the first sleeve; A first locking mechanism comprises a mounting member provided on the first telescopic tube, a sliding member slidably connected to the mounting member along the axial direction, and a first locking member provided on the sliding member; A driving mechanism, comprising a driving member disposed outside the tube assembly, the driving member being used to drive the sliding member to slide relative to the mounting member so that the mounting member contacts or moves away from the first locking member; The first locking member can be elastically deformed when in contact with the mounting member, and contact with the inner wall of the first sleeve to lock the first sleeve and the first telescopic tube.

2. The support leg assembly according to claim 1, characterized in that: The mounting member includes a first piston cylinder, the sliding member includes a first piston matched with the first piston cylinder, and a first piston rod arranged on the first piston, and the first piston cylinder is communicated with the driving member.

3. The support leg assembly according to claim 2, characterized in that: A channel communicating with the first piston cylinder is provided inside the first piston rod, and the driving mechanism further comprises a connecting pipe received in the first sleeve, and the connecting pipe is used to connect the driving member and the channel.

4. The support foot assembly according to claim 2 or 3, characterized in that: The tube set further includes a second telescopic tube disposed in the first telescopic tube, the second telescopic tube being slidably connected to the first telescopic tube along the axial direction; The support leg assembly further comprises a second locking mechanism disposed at one end of the tube assembly away from the first locking mechanism, the second locking mechanism being used to lock or unlock the second telescopic tube; the first locking mechanism is linked to the second locking mechanism.

5. The support leg assembly according to claim 4, characterized in that: One end of the sliding member away from the first locking member is a connecting end, and the connecting end is located outside the mounting member and is used to connect with the second locking mechanism.

6. The support leg assembly according to claim 5, characterized in that: The connecting end extends into the second telescopic tube, and the second locking mechanism includes a sac provided at the connecting end, the sac is communicated with the driving member, and the sac can expand to lock the second telescopic tube.

7. The support leg assembly according to claim 5, characterized in that: The tube group also includes a transmission tube arranged between the second telescopic tube and the first telescopic tube, and the second telescopic tube is slidably connected to the transmission tube along the axial direction; a connecting piece is provided at the connecting end, the transmission tube is fixedly connected to the connecting piece, and the end away from the connecting piece is connected to the second locking mechanism.

8. The support leg assembly according to claim 7, characterized in that: The second locking mechanism also includes: A second locking member, disposed at an end of the first telescopic tube away from the first locking mechanism; A second pushing member is disposed at an end of the transmission tube away from the first locking mechanism; The second pushing member can dock with the second locking member, so that the second locking member undergoes elastic deformation and contacts with the outer wall of the second telescopic tube, so as to lock the first telescopic tube and the second telescopic tube.

9. The support leg assembly according to claim 7, characterized in that: The support foot assembly further includes a limit assembly connecting the first telescopic tube and the transmission tube, and the limit assembly is used to limit the travel of the first telescopic tube and the transmission tube when they slide relative to each other.

10. The support leg assembly according to claim 3, characterized in that: The driving mechanism also includes an elastic member elastically connected to the mounting member, the elastic force of the elastic member is used to reset the mounting member and lock the first locking member, the elastic member is located in the first piston cylinder, and one end of the elastic member is connected to the first piston, and the other end is connected to the inner cylinder wall of the first piston cylinder; or, the elastic member is located outside the mounting member and is supported by the bottom end of the mounting member.

11. A support leg assembly, characterized in that: include: A tube assembly, comprising a first sleeve and a first telescopic tube sleeved with the first sleeve; A first locking mechanism comprises a mounting member provided on the first telescopic tube, a sliding member slidably connected to the mounting member along the axial direction, a first locking member provided on the mounting member, and a first pushing member provided on the sliding member; A driving mechanism, comprising a driving member disposed outside the tube assembly, the driving member being used to drive the sliding member to slide relative to the mounting member so that the first pushing member contacts or moves away from the first locking member; The first locking member can be elastically deformed when contacting the first pushing member, and contact the inner wall of the first sleeve to lock the first sleeve and the first telescopic tube.

12. The support leg assembly according to claim 11, characterized in that: The mounting member includes a first piston cylinder, the sliding member includes a first piston adapted to the first piston cylinder and a first piston rod arranged on the first piston, the first piston cylinder is connected to the driving member, and a channel connected to the first piston cylinder is provided inside the first piston rod, and the driving mechanism also includes a connecting pipe accommodated in the first sleeve, and the connecting pipe is used to connect the driving member and the channel.

13. The support leg assembly according to claim 12, characterized in that: The tube set further includes a second telescopic tube disposed in the first telescopic tube, the second telescopic tube being slidably connected to the first telescopic tube along the axial direction; The support leg assembly further comprises a second locking mechanism disposed at one end of the tube assembly away from the first locking mechanism, the second locking mechanism being used to lock or unlock the second telescopic tube; the first locking mechanism is linked to the second locking mechanism.

14. The support leg assembly according to claim 13, characterized in that: One end of the sliding member away from the first locking member is a connecting end, and the connecting end is located outside the mounting member. The tube group also includes a transmission tube arranged between the second telescopic tube and the first telescopic tube, and the second telescopic tube is connected to the transmission tube in an axial sliding manner; the connecting end is provided with a connecting member, the transmission tube is fixedly connected to the connecting member, and the end away from the connecting member is connected to the second locking mechanism.

15. The support leg assembly according to claim 14, characterized in that: The second locking mechanism also includes: A second locking member, disposed at an end of the first telescopic tube away from the first locking mechanism; A second pushing member is disposed at an end of the transmission tube away from the first locking mechanism; The second pushing member can dock with the second locking member, so that the second locking member undergoes elastic deformation and contacts with the outer wall of the second telescopic tube, so as to lock the first telescopic tube and the second telescopic tube.

16. A telescopic bracket, characterized in that: It comprises a mounting seat and a supporting foot assembly according to any one of claims 3 to 10 or 12 to 15, wherein the pipe group is rotatably arranged on the mounting seat, and the driving member is arranged on the mounting seat.

17. The telescopic bracket according to claim 16, characterized in that: The driving member comprises a second piston cylinder disposed on the mounting seat, a second piston adapted to the second piston cylinder, and a second piston rod disposed on the second piston, and the second piston cylinder is connected to the channel of the first piston cylinder through the connecting pipe; The driving mechanism also includes a handle disposed on the mounting seat, the handle being used to pull the second piston rod to move to unlock the first sleeve and the first telescopic tube, and the second piston rod is driven to reset the handle to lock the first sleeve and the first telescopic tube when resetting.

18. The telescopic bracket according to claim 16, characterized in that: The telescopic bracket includes at least three supporting leg assemblies, and the driving member is used to drive each of the supporting leg assemblies to be locked or unlocked synchronously.

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