Simple foot tube locking structure and photographing foot stool

Abstract

The utility model discloses a simple foot tube locking structure and a photographic tripod. The foot tube locking structure comprises an outer tube, an inner tube, a connecting sleeve, a first wedge block and a second wedge block, the inner pipe is rotatably inserted into the outer pipe; the connecting sleeve sleeves the outer wall of the inner pipe and is connected with the outer wall of the outer pipe; the first wedge block is arranged between the connecting sleeve and the inner pipe and is connected with the connecting sleeve; the second wedge block is movably arranged between the connecting sleeve and the inner pipe and is connected with the inner pipe; the second wedge block can push the first wedge block to tightly hold the inner pipe when the inner pipe is rotated in the forward direction so as to limit relative rotation between the inner pipe and the outer pipe. Or, the second wedge block can be pulled away from the connecting sleeve between the first wedge block when the inner pipe is reversely rotated, so that the limitation on rotation between the inner pipe and the outer pipe is relieved; by means of the structure, unlocking and locking between the outer pipe and the inner pipe can be achieved through few parts, additional limiting parts or limiting structures are not needed, the material cost is reduced while the assembling complexity is reduced, and the good practicability is achieved.

Description

Technical Field

[0001] The utility model relates to the field of photographic equipment, in particular to a simple leg tube locking structure and a photographic tripod. Background Art

[0002] Mobile phones and cameras (or tablet computers, laptop computers, etc.) are commonly used devices in people's daily life and work. In order to meet the shooting needs of some users, a photography tripod is used to support the shooting equipment during shooting, so as to free the user's hands. The photography tripod usually includes a plurality of supporting legs, and the supporting legs have multi-section leg tubes, which can be retracted to adjust the height of the bracket.

[0003] In the existing photographic tripods, such as Chinese patent CN2023212371806 - a support leg and support frame with a rotary unlocking function, two adjacent telescopic tubes are connected by a rotary locking structure, and the rotary locking structure includes a locking sleeve, a first wedge block and a second wedge block, and further discloses that the locking sleeve includes a first connecting ring, a second connecting ring and a fixing ring; a tripod with this structure not only requires an additional structure to limit the movement stroke of the first wedge block, but also the connection between the locking sleeve and the telescopic tube is relatively complicated, and the production and assembly are time-consuming and labor-intensive; therefore, a simple leg tube locking structure and a photographic tripod are urgently needed to solve the above problems. Utility Model Content

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model provides a simple leg tube locking structure and a photography tripod.

[0005] An embodiment of the utility model solves the technical problem by adopting a technical solution: a simple leg tube locking structure, comprising an outer tube, an inner tube, a connecting sleeve, a first wedge block and a second wedge block;

[0006] The inner tube is rotatably inserted into the outer tube;

[0007] The connecting sleeve is sleeved on the outer wall of the inner tube and connected to the outer wall of the outer tube;

[0008] The first wedge is arranged between the connecting sleeve and the inner tube and connected to the connecting sleeve;

[0009] The second wedge block is movably disposed between the connecting sleeve and the inner tube and is connected to the inner tube, and the second wedge block is inserted between the connecting sleeve and the first wedge block;

[0010] The second wedge block can push the first wedge block to hold the inner tube tightly when the inner tube rotates in the forward direction to limit the relative rotation between the inner tube and the outer tube; or, the second wedge block can be pulled away from between the first wedge block and the connecting sleeve when the inner tube rotates in the reverse direction to release the restriction on the rotation between the inner tube and the outer tube.

[0011] As one of the preferred embodiments of the utility model, the second wedge block is threadedly connected to the inner wall of the connecting sleeve.

[0012] As one of the preferred embodiments of the present utility model, the second wedge block is connected to the inner tube via a limiting structure, so as to limit the relative rotation between the second wedge block and the inner tube.

[0013] As one of the preferred embodiments of the utility model, the limiting structure includes a limiting rib arranged on the inner wall of the second wedge block and a limiting groove arranged on the outer wall of the inner tube. The limiting groove is arranged along the length direction of the inner tube and extends into the limiting groove.

[0014] As one of the preferred embodiments of the utility model, there is a distance between the end surface of the outer tube close to the first wedge block and the end surface of the first wedge block close to the outer tube to form a limiting space for limiting the movement stroke of the second wedge block.

[0015] As one of the preferred embodiments of the utility model, the outer tube is made of carbon fiber material and further comprises a connecting ring glued to the outer wall of the outer tube, and the connecting sleeve is threadedly connected to the connecting ring.

[0016] As one of the preferred embodiments of the utility model, the connecting sleeve is threadedly connected to the outer wall of the outer tube.

[0017] A photographic tripod comprises the tripod locking structure.

[0018] The beneficial effects of the utility model include: a simple tripod locking structure and a photographic tripod, the tripod locking structure comprising an outer tube, an inner tube, a connecting sleeve, a first wedge block and a second wedge block; the inner tube is rotatably inserted in the outer tube; the connecting sleeve is sleeved on the outer wall of the inner tube and connected to the outer wall of the outer tube; the first wedge block is arranged between the connecting sleeve and the inner tube and is connected to the connecting sleeve; the second wedge block is movably arranged between the connecting sleeve and the inner tube and is connected to the inner tube, and the second wedge block is inserted between the connecting sleeve and the first wedge block; the second wedge block can push the first wedge block to hold the inner tube tightly when the inner tube is rotated forward to limit the relative rotation between the inner tube and the outer tube; or, the second wedge block can be pulled out between the first wedge block and the connecting sleeve when the inner tube is rotated reversely to release the restriction on the rotation between the inner tube and the outer tube; through the above structure, the unlocking and locking between the outer tube and the inner tube can be achieved with fewer parts, and no additional limiting components or limiting structures are required, which reduces the assembly complexity and material costs, and has very good practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0020] Figure 1 It is a structural schematic diagram of a simple leg tube locking structure;

[0021] Figure 2 It is an exploded view of a simple foot tube locking structure;

[0022] Figure 3 It is a cross-sectional view of a simple foot tube locking structure;

[0023] Figure 4 It is Figure 3 a partial enlarged view of area A in Specific embodiments

[0024] This part will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the drawings. The function of the drawings is to supplement the description of the text part of the specification, enabling people to intuitively and vividly understand each technical feature and the overall technical solution of the present invention, but it cannot be understood as a limitation on the protection scope of the present invention.

[0025] In the description of the present invention, the meaning of "a plurality of" is more than two. Understandings such as "greater than", "less than", and "exceeding" do not include the present number, and understandings such as "above", "below", and "within" include the present number. If there is a description of "first" and "second", it is only for the purpose of distinguishing technical features and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence relationship of the indicated technical features.

[0026] In the description of the present invention, it should be understood that for the orientation description, such as the orientation or positional relationship indicated by "upper", "lower", "front", "rear", "left", "right", etc., is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0027] In the present invention, unless otherwise clearly defined, words such as "set", "installed", and "connected" should be understood in a broad sense. For example, they can be directly connected, or indirectly connected through an intermediate medium; they can be fixedly connected, or detachably connected, and can also be integrally formed; they can be mechanically connected; they can be the communication inside two elements or the interaction relationship between two elements. Those skilled in the art can reasonably determine the specific meanings of the above words in the present invention in combination with the specific content of the technical solution.

[0028] Referring to Figures 1 to 4 , a simple foot tube locking structure includes an outer tube 10, an inner tube 20, a connecting sleeve 30, a first wedge block 40, and a second wedge block 50;

[0029] The inner tube 20 is rotatably inserted into the outer tube 10;

[0030] The connecting sleeve 30 is sleeved on the outer wall of the inner tube 20 and connected to the outer wall of the outer tube 10;

[0031] The first wedge block 40 is arranged between the connecting sleeve 30 and the inner tube 20 and connected to the connecting sleeve 30;

[0032] The second wedge block 50 is movably arranged between the connecting sleeve 30 and the inner tube 20 and connected to the inner tube 20, and the second wedge block 50 is inserted between the connecting sleeve 30 and the first wedge block 40;

[0033] When the inner tube 20 rotates forward, the second wedge block 50 can push against the first wedge block 40 to hold the inner tube 20 tightly, so as to limit the relative rotation between the inner tube 20 and the outer tube 10; or, when the inner tube 20 rotates reversely, the second wedge block 50 can be withdrawn between the first wedge block 40 and the connecting sleeve 30 to release the restriction on the rotation between the inner tube 20 and the outer tube 10.

[0034] In the present utility model, the leg tube locking structure is applied to a photographic tripod. Specifically, it is connected to a three-cut seat. During assembly, first, the lower end of the first wedge block 40 is connected to the lower end of the connecting sleeve 30, then the second wedge block 50 is threadedly connected to the inner wall of the connecting sleeve 30, and the inner tube 20 passes through the connecting sleeve 30, the first wedge block 40, and the second wedge block 50. In one embodiment, the second wedge block 50 is connected to the inner tube 20 through a limiting structure 60 for restricting the relative rotation between the second wedge block 50 and the inner tube 20. As a preferred embodiment of the limiting structure 60, the limiting structure 60 includes a limiting rib 61 provided on the inner wall of the second wedge block 50 and a limiting groove 62 provided on the outer wall of the inner tube 20. The limiting groove 62 is arranged along the length direction of the inner tube 20, and 61 extends into the limiting groove 62. At this time, the inner tube 20 needs to align the limiting groove 62 on its outer wall with the limiting rib 61 on the inner wall of the second wedge block 50 and then push it into the connecting sleeve 30. Finally, the outer tube 10 is sleeved on the inner tube 20 from top to bottom, and the upper end of the connecting sleeve 30 is fixedly connected to the outer wall of the outer tube 10.

[0035] When in use, rotating the inner tube 20 drives the second wedge block 50 to rotate. The second wedge block 50 makes a linear motion along the length direction of the inner tube 20 under the restriction of the limiting structure 60, which can change the depth of the second wedge block 50 inserted between the connecting sleeve 30 and the first wedge block 40, thereby adjusting the extrusion force between the first wedge block 40 and the inner tube 20, and realizing the unlocking and locking of the relative rotation between the inner tube 20 and the outer tube 10. The advantages of the present utility model are as follows: Through the above structure, the unlocking and locking between the outer tube and the inner tube can be realized with fewer parts, and no additional limiting components or limiting structures are required, reducing the assembly complexity and material cost at the same time, and having very good practicability.

[0036] In one embodiment, the second wedge block 50 is threadedly connected to the inner wall of the connecting sleeve 30.

[0037] In one embodiment, there is a spacing between the end face of the outer tube 10 on the side close to the first wedge block 40 and the end face of the first wedge block 40 on the side close to the outer tube 10, so as to form a limiting space 70 for restricting the movement stroke of the second wedge block 50; the size of the limiting space 70 can be changed by adjusting the distance between the end face of the outer tube 10 and the end face of the first wedge block 40, thereby changing the operating stroke of the second wedge block 50, that is, directly using the end face of the outer tube 10 for limiting, eliminating the need for additional limiting components or limiting structures.

[0038] As a first embodiment of the connection between the outer tube 10 and the connecting sleeve 30, the outer tube 10 is made of carbon fiber material, and further includes a connecting ring 80 adhesively attached to the outer wall of the outer tube 10, and the connecting sleeve 30 is threadedly connected to the connecting ring 80; the carbon fiber material has excellent properties, but thread turning cannot be performed on the carbon fiber tube, so it is necessary to transfer through the connecting ring 80.

[0039] As a second embodiment of the connection between the outer tube 10 and the connecting sleeve 30, the connecting sleeve 30 is threadedly connected to the outer wall of the outer tube 10; in this embodiment, threads matching the connecting sleeve 30 are directly turned on the outer wall of the outer tube 10 to achieve the connection between the two.

[0040] A photographic tripod includes the above-mentioned leg tube locking structure.

[0041] Of course, the present utility model is not limited to the above embodiments, and those skilled in the art can make equivalent deformations or substitutions without departing from the spirit of the present utility model, and these equivalent deformations and substitutions are all included within the scope defined by the claims of this application.

Claims

1. A simple leg locking structure, characterized in that: It comprises an outer tube (10), an inner tube (20), a connecting sleeve (30), a first wedge block (40) and a second wedge block (50); The inner tube (20) is rotatably inserted into the outer tube (10); The connecting sleeve (30) is sleeved on the outer wall of the inner tube (20) and connected to the outer wall of the outer tube (10); The first wedge block (40) is disposed between the connecting sleeve (30) and the inner tube (20) and is connected to the connecting sleeve (30); The second wedge block (50) is movably disposed between the connecting sleeve (30) and the inner tube (20) and is connected to the inner tube (20), and the second wedge block (50) is inserted between the connecting sleeve (30) and the first wedge block (40); The second wedge block (50) can push the first wedge block (40) to hold the inner tube (20) tightly when the inner tube (20) is rotated in the forward direction, so as to limit the relative rotation between the inner tube (20) and the outer tube (10); or, the second wedge block (50) can be withdrawn between the first wedge block (40) and the connecting sleeve (30) when the inner tube (20) is rotated in the reverse direction, so as to release the restriction on the rotation between the inner tube (20) and the outer tube (10).

2. A simple leg locking structure according to claim 1, characterized in that: The second wedge block (50) is threadedly connected to the inner wall of the connecting sleeve (30).

3. The simple leg tube locking structure according to claim 1, characterized in that: The second wedge block (50) is connected to the inner tube (20) via a limiting structure (60) and is used to limit the relative rotation between the second wedge block (50) and the inner tube (20).

4. The simple leg tube locking structure according to claim 3, characterized in that: The limiting structure (60) comprises a limiting rib (61) arranged on the inner wall of the second wedge block (50) and a limiting groove (62) arranged on the outer wall of the inner tube (20); the limiting groove (62) is arranged along the length direction of the inner tube (20), and the (61) extends into the limiting groove (62).

5. The simple leg locking structure according to claim 1, characterized in that: There is a distance between the end surface of the outer tube (10) close to the first wedge block (40) and the end surface of the first wedge block (40) close to the outer tube (10), so as to form a limiting space (70) for limiting the movement stroke of the second wedge block (50).

6. The simple leg tube locking structure according to claim 1, characterized in that: The outer tube (10) is made of carbon fiber material and further comprises a connecting ring (80) glued to the outer wall of the outer tube (10), and the connecting sleeve (30) is threadedly connected to the connecting ring (80).

7. The simple leg tube locking structure according to claim 1, characterized in that: The connecting sleeve (30) is threadably connected to the outer wall of the outer tube (10).

8. A photography tripod, characterized in that: It comprises the leg tube locking structure as described in any one of claims 1 to 7.

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