A telescopic leg pipe with a quick unlocking function and a support frame

Abstract

This utility model discloses a telescopic leg tube and support frame with a quick locking and unlocking function. The telescopic leg tube includes a linkage rod and several sequentially cascaded leg tube assemblies. The linkage rod passes through several leg tube assemblies. Each leg tube assembly includes an outer tube, an inner tube, a synchronizing sleeve, a connecting sleeve, and a locking component. The synchronizing sleeve can move axially in a first direction relative to the linkage rod when the linkage rod rotates in the forward direction, thereby driving the locking component through the inner tube to restrict the relative movement between the inner tube and the outer tube of the next-level leg tube assembly. Alternatively, the synchronizing sleeve can move axially in a second direction relative to the linkage rod when the linkage rod rotates in the reverse direction, thereby driving the locking component through the inner tube to release the restriction on the relative movement between the inner tube and the outer tube of the next-level leg tube assembly. Through the above structure, multiple sets of leg tube assemblies can be simultaneously locked and unlocked by the linkage rod, making the structure uniform, which not only improves the convenience of use but also reduces the structural complexity and production cost.

Description

Technical Field

[0001] This utility model relates to the field of photographic equipment, and in particular to a telescopic leg tube and support frame with a quick unlocking and locking function. Background Technology

[0002] Mobile phones and cameras (or tablets, laptops, etc.) are commonly used devices in people's daily lives and work. In order to meet the shooting needs of some users, a support stand is used to support the shooting equipment during shooting, so as to free up the user's hands.

[0003] Existing support frames have some problems. For example, Chinese Utility Model Patent 2023212319328 discloses a method for locking or unlocking the second and third telescopic tube assemblies through the cooperation of a lever, transmission tube, first wedge, and second wedge, and for locking or unlocking the first telescopic tube assembly and the fixed seat through the cooperation of a lever, rotating shaft, pressure block, and connecting rod, ultimately achieving the expansion and retraction of the three-stage telescopic legs. However, in this type of support frame, locking or unlocking between the first and second telescopic tube assemblies, as well as between the second and third telescopic tube assemblies, cannot be accomplished through the same transmission tube, increasing the complexity of the locking structure and making production inconvenient. Therefore, there is an urgent need for a telescopic leg and support frame with a quick locking and unlocking function to solve the above problems. Utility Model Content

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a telescopic leg tube and support frame with a quick unlocking and locking function.

[0005] The technical solution adopted by one embodiment of this utility model to solve its technical problem is: a telescopic foot tube with a quick unlocking and locking function, including a linkage rod and a number of sequentially cascaded foot tube assemblies, the linkage rod passing through the number of foot tube assemblies, and the foot tube assembly including an outer tube, an inner tube, a synchronization sleeve, a connecting sleeve and a locking component;

[0006] The outer tube is fitted onto the inner tube;

[0007] The synchronizing sleeve is fitted onto the linkage rod and connected to the upper end of the inner tube;

[0008] The connecting sleeve is connected to the lower end of the outer tube and threaded to the lower end of the inner tube;

[0009] The locking assembly is connected between the lower end of the inner tube and the outer tube of the next-stage foot tube assembly;

[0010] The synchronizing sleeve can move axially in a first direction relative to the linkage rod when the linkage rod rotates in the forward direction, so as to restrict the relative movement between the inner tube and the outer tube of the next-level foot tube assembly by driving the locking component through the inner tube; or, the synchronizing sleeve can move axially in a second direction relative to the linkage rod when the linkage rod rotates in the reverse direction, so as to release the restriction on the relative movement between the inner tube and the outer tube of the next-level foot tube assembly by driving the locking component through the inner tube.

[0011] As one of the preferred embodiments of this utility model, the cross-sectional outline of the linkage rod is non-circular, and the synchronous sleeve is provided with a through groove adapted to the linkage rod, and the linkage rod passes through the through groove.

[0012] As one of the preferred embodiments of this utility model, the cross-sectional outline of the linkage rod is set to a rectangle.

[0013] As one of the preferred embodiments of this utility model, a linkage sleeve is provided on the outer side of the linkage rod, and the synchronization sleeves of two adjacent foot tube assemblies are provided on the outer side of the linkage sleeve.

[0014] As one of the preferred embodiments of this utility model, a connecting sleeve is provided between the linkage rod and the linkage sleeve.

[0015] As one of the preferred embodiments of this utility model, the locking component includes a first wedge block installed at the lower end of the inner tube and a second wedge block installed on the connecting sleeve, wherein the second wedge block abuts against the first wedge block and the outer tube of the next-level foot tube assembly.

[0016] As one of the preferred embodiments of this utility model, a telescopic foot tube with a quick unlocking and locking function further includes a fine-tuning component connected between the connecting sleeve and the second wedge block, used to adjust the distance between the second wedge block and the first wedge block.

[0017] As one of the preferred embodiments of this utility model, the fine-tuning component includes a threaded sleeve, one end of which is threadedly connected to the connecting sleeve, and the other end of which is connected to the second wedge.

[0018] As one of the preferred embodiments of this utility model, an anti-slip plate is provided between the inner tube and the outer tube of the next-level foot tube assembly.

[0019] A support frame, including the aforementioned telescopic legs.

[0020] The beneficial effects of this utility model are as follows: A telescopic leg tube and support frame with a quick locking and unlocking function, the telescopic leg tube includes a linkage rod and several sequentially cascaded leg tube assemblies. The linkage rod passes through several leg tube assemblies. Each leg tube assembly includes an outer tube, an inner tube, a synchronizing sleeve, a connecting sleeve, and a locking assembly. The synchronizing sleeve can move axially in a first direction relative to the linkage rod when the linkage rod rotates in the forward direction, so as to drive the locking assembly through the inner tube to restrict the relative movement between the inner tube and the outer tube of the next-level leg tube assembly; or, the synchronizing sleeve can move axially in a second direction relative to the linkage rod when the linkage rod rotates in the reverse direction, so as to drive the locking assembly through the inner tube to release the restriction on the relative movement between the inner tube and the outer tube of the next-level leg tube assembly. Through the above structure, multiple sets of leg tube assemblies can be locked and unlocked simultaneously through the linkage rod, making the structure uniform, which not only improves the convenience of use, but also reduces the structural complexity and production cost. Attached Figure Description

[0021] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0022] Figure 1 This is a schematic diagram of a telescopic leg tube with a quick unlocking and locking function in its retracted state.

[0023] Figure 2 This is a schematic diagram of a telescopic leg tube with a quick unlocking and locking function in its deployed state.

[0024] Figure 3 A cross-sectional view of a telescopic leg tube with a quick unlocking and locking function in its unfolded state;

[0025] Figure 4 for Figure 3 A magnified view of a portion of region A in the middle;

[0026] Figure 5 for Figure 3 A magnified view of a portion of region B in the middle;

[0027] Figure 6 for Figure 3 A magnified view of a portion of region C. Detailed Implementation

[0028] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0029] In the description of this utility model, "multiple" means two or more; "greater than," "less than," and "exceeding" are understood to exclude the stated number; "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly specifying the number of indicated technical features or their sequential relationship.

[0030] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0031] In this utility model, unless otherwise explicitly defined, the terms "setting," "installing," and "connecting" should be interpreted broadly. For example, they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to a fixed connection, a detachable connection, or an integral molding; they can refer to a mechanical connection; they can refer to the internal connection of two components or the interaction between two components. Those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0032] Reference Figures 1 to 6 This utility model provides a telescopic leg tube with a quick unlocking and locking function, including a linkage rod 100 and several sequentially cascaded leg tube assemblies 200. The linkage rod 100 passes through several leg tube assemblies 200. The leg tube assembly 200 includes an outer tube 210, an inner tube 220, a synchronization sleeve 230, a connecting sleeve 240, and a locking component 250.

[0033] The outer tube 210 is fitted onto the inner tube 220;

[0034] Synchronous sleeve 230 is fitted onto linkage rod 100 and connected to the upper end of inner tube 220;

[0035] The connecting sleeve 240 is connected to the lower end of the outer tube 210 and threaded to the lower end of the inner tube 220;

[0036] The locking component 250 is connected between the lower end of the inner tube 220 and the outer tube 210 of the next-level foot tube assembly 200;

[0037] The synchronizing sleeve 230 can move axially in a first direction relative to the linkage rod 100 when the linkage rod 100 rotates in the forward direction, so as to drive the locking component 250 through the inner tube 220 to restrict the relative movement between the inner tube 220 and the outer tube 210 of the next-level foot tube assembly 200; or, the synchronizing sleeve 230 can move axially in a second direction relative to the linkage rod 100 when the linkage rod 100 rotates in the reverse direction, so as to drive the locking component 250 through the inner tube 220 to release the restriction on the relative movement between the inner tube 220 and the outer tube 210 of the next-level foot tube assembly 200.

[0038] Reference Figures 1-6 In this utility model, the foot tube assembly 200 is set in three groups as an example for explanation. Specifically, it includes foot tube assemblies 200a, 200b, 200c, and 200d arranged sequentially. The linkage rod 100 is simultaneously inserted into foot tube assemblies 200a, 200b, 200c, and 200d. Specifically, 1) the outer tube 210b is inserted into the inner tube 220a, the outer tube 210c is inserted into the inner tube 220b, and the outer tube 210d is inserted into the inner tube 220c. The synchronous sleeve 230a is sleeved on the linkage rod 100 and connected to the upper end of the inner tube 220a. The connecting sleeve 240a is installed at the lower end of the outer tube 210a and threadedly connected to the lower end of the inner tube 220a. The locking component 250a is connected to the inner tube 220a. 1) Between the lower end and the outer tube 210b; 2) The synchronizing sleeve 230b is sleeved on the linkage rod 100 and connected to the upper end of the inner tube 220b, the connecting sleeve 240b is installed on the lower end of the outer tube 210b and threadedly connected to the lower end of the inner tube 220b, and the locking component 250b is connected between the lower end of the inner tube 220b and the outer tube 210c; 3) The synchronizing sleeve 230c is sleeved on the linkage rod 100 and connected to the upper end of the inner tube 220c, the connecting sleeve 240c is installed on the lower end of the outer tube 210c and threadedly connected to the lower end of the inner tube 220c, and the locking component 250c is connected between the lower end of the inner tube 220c and the outer tube 210d; 4) Since the foot tube assembly 200d is the last stage, the inner tube 220d, the synchronizing sleeve 230d, the connecting sleeve 240d and the locking component 250d are not needed.

[0039] Specifically, when the linkage 100 rotates in the reverse direction, it will simultaneously drive the synchronous sleeves 230a, 230b, and 230c to rotate in the reverse direction. Since the connecting sleeves 240a, 240b, and 240c are respectively threaded to the lower ends of the inner tubes 220a, 220b, and 220c, the rotational motion of the synchronous sleeve 230 will be transformed into the relative rotation of the synchronous sleeve 230 and the inner tube 220 with respect to the linkage 100. Axial upward movement triggers locking components 250a, 250b, and 250c to enter the unlocked state, respectively releasing the restrictions on relative movement between the inner tube 220a and outer tube 210b, between the inner tube 220b and outer tube 210c, and between the inner tube 220c and outer tube 210d. The entire leg tube is in the unlocked state, allowing leg tube assembly 200b to axially expand or retract relative to leg tube assembly 200a, and leg tube assembly 200c to axially expand or retract relative to leg tube assembly 200a. The axial expansion or contraction of 0b and the axial expansion or contraction of the leg tube assembly 200d relative to the leg tube assembly 200c; when the linkage rod 100 rotates in the forward direction, it will simultaneously drive the synchronous sleeves 230a, 230b, and 230c to rotate in the forward direction. Since the connecting sleeves 240a, 240b, and 240c are respectively threaded to the lower end of the inner tube 220a, the lower end of the inner tube 220b, and the lower end of the inner tube 220c, it will cause the synchronous... The rotational motion of the step sleeve 230 is converted into the axial downward movement of the synchronous sleeve 230 and the inner tube 220 relative to the linkage rod 100, which triggers the locking components 250a, 250b and 250c to enter the locking state, that is, restricting the relative movement between the inner tube 220a and the outer tube 210b, between the inner tube 220b and the outer tube 210c and between the inner tube 220c and the outer tube 210d respectively. The entire foot tube is in the locked state and can maintain the unfolded state or the retracted state.

[0040] Reference Figures 3-6 In some embodiments, the cross-sectional outline of the linkage rod 100 is non-circular, and the synchronization sleeve 230 is provided with a through groove 231 adapted to the linkage rod 100, and the linkage rod 100 passes through the through groove 231; preferably, the cross-sectional outline of the linkage rod 100 is set to rectangular; this setting can realize the synchronous rotation and axial movement between the synchronization sleeve 230 and the linkage rod 100.

[0041] Reference Figures 3-6In some embodiments, a linkage sleeve 300 is sleeved on the outer side of the linkage rod 100, and the synchronization sleeves 230 of two adjacent leg tube assemblies 200 are sleeved on the outer side of the linkage sleeve 300. Specifically, the upper end of the linkage sleeve 300 is connected to the synchronization sleeve 230b and the lower end is connected to the synchronization sleeve 230c. That is, the linkage sleeve 300 is located in the inner tube 220b. It can play the role of linking the leg tube assembly 200a, leg tube assembly 200b and leg tube assembly 200c when the leg tube assembly 200b is unfolded relative to the leg tube assembly 200a. It can also fit against the outer wall of the linkage rod 100 when the leg tube assembly 200b is folded relative to the leg tube assembly 200a, thereby reducing the fixed length of the linkage rod 100, that is, reducing the fixed length of the leg tube in the folded state.

[0042] Reference Figures 3-6 In some embodiments, a mating sleeve 400 is provided between the linkage rod 100 and the linkage sleeve 300; this arrangement can reduce the outer diameter of the linkage rod 100 and the wall thickness of the linkage sleeve 300, which not only reduces the overall weight but also reduces material costs.

[0043] Reference Figures 3-6 In some embodiments, the locking component 250 includes a first wedge 251 mounted on the lower end of the inner tube 220 and a second wedge 252 mounted on the connecting sleeve 240. The second wedge 252 abuts against the first wedge 251 and the outer tube 210 of the next-stage foot tube assembly 200. When the inner tube 220 drives the first wedge 251 to move downward, the tightness between the first wedge 251 and the second wedge 252 will increase, thereby pushing the second wedge 252 to abut against the outer tube 210, thus restricting the axial movement between two adjacent foot tube assemblies 200. When the inner tube 220 drives the first wedge 251 to move upward, the tightness between the first wedge 251 and the second wedge 252 will decrease, thereby reducing the tightness between the second wedge 252 and the outer tube 210, thus releasing the restriction on the axial movement between two adjacent foot tube assemblies 200.

[0044] Reference Figures 3-6In some embodiments, a telescopic leg tube with a quick locking and unlocking function further includes a fine-tuning component 500 connected between the connecting sleeve 240 and the second wedge 252, used to adjust the distance between the second wedge 252 and the first wedge 251; preferably, the fine-tuning component 500 includes a threaded sleeve 510, one end of which is threadedly connected to the connecting sleeve 240, and the other end of which is connected to the second wedge 252; due to reasons such as manufacturing precision, assembly precision, or wear and tear, the tightness between the second wedge 252 and the first wedge 251 may not meet the locking requirements. In this case, the distance between the second wedge 252 and the first wedge 251 can be reduced by rotating the threaded sleeve 510, so that the second wedge 252 and the first wedge 251 can always maintain a good tightness effect.

[0045] Of course, the threaded sleeve 510 can also be used as an emergency unlocking function. Specifically, the power source of the linkage rod 100 can be manual or motor driven. When the linkage rod 100 is driven by a motor, the motor may not work for various reasons, causing the foot tube to be unable to unlock or lock. At this time, the distance between the second wedge 252 and the first wedge 251 can be changed by rotating the threaded sleeve 510, so that the second wedge 252 and the first wedge 251 are pressed together or separated from each other, which can also lock or unlock the axial movement between the two adjacent foot tube assemblies 200.

[0046] Reference Figures 3-6 In some embodiments, an anti-slip plate 600 is provided between the inner tube 220 and the outer tube 210 of the next-level foot tube assembly 200; by providing the anti-slip plate 600, a sliding damping effect is achieved between the inner tube 220 and the outer tube 210 of the next-level foot tube assembly 200, thereby improving the performance.

[0047] This utility model also provides a support frame, including the aforementioned telescopic leg tube.

[0048] The advantages of this utility model are: the above structure can simultaneously lock and unlock multiple sets of foot tube assemblies through the linkage rod, making the structure uniform, which not only improves the convenience of use, but also reduces the structural complexity and production cost.

[0049] Of course, this utility model is not limited to the above-described embodiments. Those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of this utility model. All such equivalent modifications and substitutions are included within the scope defined by the claims of this application.

Claims

1. A telescopic leg tube with a quick unlocking and locking function, characterized in that: It includes a linkage rod (100) and a plurality of sequentially cascaded foot tube assemblies (200). The linkage rod (100) passes through the plurality of foot tube assemblies (200). The foot tube assembly (200) includes an outer tube (210), an inner tube (220), a synchronization sleeve (230), a connecting sleeve (240), and a locking component (250). The outer tube (210) is sleeved on the inner tube (220); The synchronization sleeve (230) is sleeved on the linkage rod (100) and connected to the upper end of the inner tube (220); The connecting sleeve (240) is connected to the lower end of the outer tube (210) and threadedly connected to the lower end of the inner tube (220); The locking assembly (250) is connected between the lower end of the inner tube (220) and the outer tube (210) of the next-level foot tube assembly (200); The synchronizing sleeve (230) can move axially in a first direction relative to the linkage rod (100) when the linkage rod (100) rotates in the forward direction, so as to drive the locking component (250) through the inner tube (220) to restrict the relative movement between the inner tube (220) and the outer tube (210) of the next-level foot tube assembly (200); or, the synchronizing sleeve (230) can move axially in a second direction relative to the linkage rod (100) when the linkage rod (100) rotates in the reverse direction, so as to drive the locking component (250) through the inner tube (220) to release the restriction on the relative movement between the inner tube (220) and the outer tube (210) of the next-level foot tube assembly (200).

2. A telescopic leg tube with quick locking and unlocking function according to claim 1, characterized in that: The cross-sectional outline of the linkage rod (100) is non-circular, and the synchronization sleeve (230) is provided with a through groove (231) that is adapted to the linkage rod (100), and the linkage rod (100) passes through the through groove (231).

3. A telescopic leg tube with quick locking / unlocking function according to claim 2, characterized in that: The cross-sectional outline of the linkage rod (100) is set to a rectangle.

4. A telescopic leg tube with quick locking and unlocking function according to claim 1, characterized in that: A linkage sleeve (300) is provided on the outside of the linkage rod (100), and the synchronization sleeves (230) of the two adjacent foot tube assemblies (200) are provided on the outside of the linkage sleeve (300).

5. A telescopic leg tube with quick locking / unlocking function according to claim 4, characterized in that: A connecting sleeve (400) is provided between the linkage rod (100) and the linkage sleeve (300).

6. A telescopic leg tube with quick locking and unlocking function according to claim 1, characterized in that: The locking assembly (250) includes a first wedge (251) installed at the lower end of the inner tube (220) and a second wedge (252) installed on the connecting sleeve (240), the second wedge (252) abutting against the first wedge (251) and the outer tube (210) of the next-level foot tube assembly (200).

7. A telescopic leg tube with a quick unlocking and locking function according to claim 6, characterized in that: It also includes a fine-tuning component (500) connected between the connecting sleeve (240) and the second wedge (252) for adjusting the distance between the second wedge (252) and the first wedge (251).

8. A telescopic leg tube with a quick unlocking and locking function according to claim 7, characterized in that: The fine-tuning component (500) includes a threaded sleeve (510), one end of which is threadedly connected to the connecting sleeve (240), and the other end of which is connected to the second wedge (252).

9. A telescopic leg tube with quick locking / unlocking function according to claim 1, characterized in that: An anti-slip plate (600) is provided between the inner tube (220) and the outer tube (210) of the next-level foot tube assembly (200).

10. A support frame, characterized in that: Includes the telescopic leg tube as described in any one of claims 1-9.

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