Foot tube locking structure and photographing tripod

Abstract

The utility model belongs to the technical field of photographic equipment, and particularly relates to a foot tube locking structure and a photographic tripod. Comprising a locking pipe sleeve, and a foot pipe is connected with the locking pipe sleeve; the locking linkage block is coaxially connected with the locking pipe sleeve; the locking linkage block is sleeved with the locking pressing block, the locking pressing block is further provided with a rolling body protruding out of the outer surface of the locking pressing block, and when the locking linkage block rotates along with the inner pipe, the locking pressing block can move relative to the locking pipe sleeve. The locking device is simple in structure, unlocking is achieved through rotation of the inner pipe, the adjusting speed is higher, and operation is easier.

Description

Technical Field

[0001] This utility model belongs to the technical field of photographic equipment, and in particular relates to a leg locking structure and a photographic tripod. Background Technology

[0002] Tripods are essential accessories for photographic equipment. With advancements in science and technology, they have gradually achieved higher strength and lighter weight. Functionally, they allow for adjustments to angle, height, and storage. Traditional leg locking mechanisms, especially for multi-section leg extensions, mostly use a rotating locking structure at the joint of each leg section. Users need to adjust step by step during extension, which is slow and cumbersome. While multi-stage adjustable locking mechanisms exist, they are complex, have weak locking force, and their stability is questionable. Utility Model Content

[0003] The purpose of this utility model is to provide a foot tube locking structure, which has a simple structure and can be unlocked by rotating the inner tube, making the adjustment speed faster and the operation simpler.

[0004] Based on this, the present invention provides a leg tube locking structure, including...

[0005] Locking sleeve, the foot tube is connected to the locking sleeve;

[0006] A locking linkage block is coaxially connected to the locking sleeve;

[0007] A locking pressure block is sleeved on a locking linkage block, and the locking pressure block is also provided with a rolling element protruding from its outer surface. When the locking linkage block rotates with the inner tube, the locking pressure block can move relative to the locking sleeve.

[0008] As described above, in a foot tube locking structure, the locking block has an inner cavity, a portion of the surface of the rolling element is placed inside the inner cavity, and the locking sleeve has a pressing part that extends into the inner cavity. The pressing part abuts against the rolling element, causing the rolling element to tend to move towards the outside of the locking block.

[0009] In the foot tube locking structure described above, the rolling element is a roller, which is rotatably mounted on the locking pressure block, and the roller only rolls in the axial direction.

[0010] In the foot tube locking structure described above, there are multiple rolling elements, and the multiple rolling elements are distributed along the horizontal circumference on the outer peripheral surface of the locking block.

[0011] In the foot tube locking structure described above, there are multiple rolling elements, and the multiple rolling elements form at least two rows of wheel rows distributed along the circumference.

[0012] As described above, in a foot tube locking structure, the outer peripheral surface of the top pressing part has an annular guide surface, and the cross-section of the annular guide surface has an outer contour that is oblique along the axis.

[0013] As described above, in a leg locking structure, the locking linkage block includes:

[0014] Positioning department;

[0015] The first connecting end is located on the upper side of the positioning part and has a threaded connecting part on its outer peripheral surface. The locking block is sleeved on the first connecting end and located on the upper side of the positioning part.

[0016] The second connecting end is located on the lower side of the positioning part, and the locking sleeve is connected to the second connecting end;

[0017] The mounting hole extends through the positioning part, the first connecting end, and the second connecting end, and is used for the inner tube to pass through.

[0018] The foot tube locking structure described above also includes a locking nut, which is connected to the first connecting end and pressed against the locking sleeve.

[0019] As described above, in a foot tube locking structure, the inner wall of the mounting hole is provided with a limiting part that is opened along the axial direction, and the outer circumferential surface of the inner tube is provided with a limiting structure that cooperates with the limiting part. The limiting part and the limiting structure cooperate to allow the locking linkage block to rotate with the inner tube.

[0020] This utility model also provides a photography tripod, including a tripod body, on which the above-mentioned leg locking structure is provided.

[0021] Implementing the embodiments of this utility model has the following beneficial effects:

[0022] 1. This utility model provides a leg tube locking structure, which, after installation, presses the rolling element of the locking block against the inner wall of the other leg tube, thereby forming a relative lock between the two leg tubes. By rotating the locking linkage block, the locking block moves relative to the locking sleeve and releases the rolling element, reducing its pressure on the inner wall of the other leg tube. This allows the two leg tubes to unlock and move relative to each other for telescopic operation. The structure is simple and provides good locking force, maintaining a stable locking state after telescopic operation.

[0023] 2. This utility model adopts a double-row rolling element design, which effectively increases the contact range with the inner wall of the other leg tube when locking, greatly improving stability. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the leg locking structure of the single-section leg tube assembly in this utility model;

[0026] Figure 2 for Figure 1 Exploded view;

[0027] Figure 3 A cross-sectional view of the locked state;

[0028] Figure 4 This is a cross-sectional view of the unlocked state. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] like Figures 1 to 4 As shown, this utility model embodiment provides a leg tube locking structure. In use, the locking component, the leg tube 9, and the inner tube 8 form a single leg tube assembly. The locking component is located at the upper end of the leg tube 9, and the inner tube 8 passes through the locking component inside the leg tube 9. In application, another leg tube assembly is sleeved on this leg tube assembly. Of course, the inner diameter of the other leg tube is larger than the outer diameter of this leg tube 9, so that this leg tube assembly can extend and retract relative to the other leg tube assembly.

[0031] This solution takes a single-section leg tube assembly as an example. The locking component includes: a locking sleeve 5, to which the leg tube 9 is connected; a locking linkage block 2, coaxially connected to the locking sleeve 5, through which the inner tube 8 passes and can rotate with the inner tube 8; and a locking pressure block 3, sleeved on the locking linkage block 2, and the locking pressure block 3 is also provided with a rolling element 4 protruding from its outer surface. When the locking linkage block 2 rotates with the inner tube 8, the locking pressure block 3 can move relative to the locking sleeve 5. After installation, the locking block 3 is pressed against the inner wall of the other leg tube 91 by the rolling element 4, thus forming a relative lock between the two leg tubes. The locking linkage block 2 rotates, which drives the locking block 3 to move relative to the locking sleeve 5 and releases the rolling element 4, reducing its pressure on the inner wall of the other leg tube. This allows the two leg tubes to be unlocked and move relative to each other for telescopic operation. The structure is simple and provides good locking force, and can maintain a stable locking state after telescopic operation.

[0032] Preferably, this solution can be implemented by connecting the inner tube 8 to the locking linkage block 2. In this way, simply rotating the inner tube 8 will drive the locking linkage block 2 to rotate. Furthermore, in this solution, when the inner tube 8 drives the locking linkage block 2 to rotate, the locking pressure block 3 moves upward relative to the locking sleeve 5, thus moving away from the locking sleeve 5. At this time, the rolling element 4 is released, reducing the pressure on the other leg tube 91, thereby achieving the unlocked state. When the inner tube 8 returns to its original position, the locking pressure block 3 moves downward relative to the locking sleeve 5, thus approaching the locking sleeve 5. The locking sleeve 5 then pushes the rolling element 4 outward, thus returning to the locked state.

[0033] Furthermore, in this embodiment of the present invention, the locking block 3 has an inner cavity 301, a portion of the surface of the rolling element 4 is placed within the inner cavity 301, and the locking sleeve 5 has a pressing portion 51 extending into the inner cavity 301. The pressing portion 51 abuts against the rolling element 4, causing the rolling element 4 to tend to move outwards from the locking block 3. Specifically, the inner cavity 301 of the locking block 3 in this solution has a downward-facing opening, and its circumferential surface has a notch for mounting the rolling element 4. It can be understood that the rolling element 4 is positioned on the notch, can roll itself, and can move radially relative to the locking block 3. Thus, when the rolling element 4 is pressed by the pressing portion 51, it moves radially outwards, thereby contacting the inner wall of the other outer section of the leg tube 91 and applying sufficient pressure to achieve the locking effect. Furthermore, by extending the pressing portion 51 into the inner cavity 301, this solution makes the inner cavity structure more compact, resulting in a more stable overall structure and reduced shaking.

[0034] In this embodiment of the invention, the rolling element 4, in addition to its locking function, also has a guiding sliding function. The rolling element 4 in this solution is a roller, which is rotatably mounted on the locking block 3, and the roller only rolls in the axial direction. Here, the axial direction refers only to the axis of the foot tube 9, which effectively prevents this foot tube assembly from rotating relative to another foot tube assembly, that is, it can only move relative to the axial direction.

[0035] In this solution, the use of the roller-shaped rolling element 4 also enables a strong unfolding operation when locked. Specifically, taking the upward movement of the locking block 3 relative to the locking sleeve 5 during unlocking as an example, if the user directly pulls the leg tube 9 in the locked state, since the leg tube 9 is connected to the locking sleeve 5, the locking sleeve 5 tends to move downward relative to the locking block 3, thereby reducing the top pressure on the rolling element 4. At this time, under the action of the rolling element 4 which only rolls in the axial direction, the leg tube assembly can smoothly extend outward relative to the other leg tube assembly, thus unfolding in the locked state. Generally, the unlocking operation is set at the upper end of the outermost leg tube assembly. This makes it convenient for the user to fully unfold multiple leg tube assemblies without having to maintain the unlocking operation, thus avoiding the inconvenience of operation when multiple leg tubes are unfolded.

[0036] Of course, this structure also prevents users from forcibly folding the legs. When locked, if a user forcibly pushes one leg section into another leg section 91, the upward force applied to the locking sleeve 5 during this push increases the pressure of the locking sleeve 5 against the rolling element 4. This, in turn, increases the pressure of the rolling element 4 against the inner wall of the other leg section, preventing directional movement and effectively preventing retraction due to external force during use, thus improving locking stability. Furthermore, since the lowest leg section is supported on the ground during use, it can be understood that the user only needs to operate the unlocking mechanism at the top and press the outermost leg section downwards to fold the multi-stage leg assembly, eliminating the need to consider the problem of excessive length after unfolding and the inconvenience of folding.

[0037] In addition, to further improve stability, the outer contour of the roller-shaped rolling element 4 in this design matches the inner wall of the other leg tube 91, which increases the contact area and reduces relative wobbling.

[0038] In one embodiment of this scheme, there are multiple rolling elements 4, and the multiple rolling elements 4 are distributed along the horizontal circumference on the outer peripheral surface of the locking block 3.

[0039] In the second embodiment of this solution, there are multiple rolling elements 4, and the multiple rolling elements 4 form at least two rows of wheels distributed along the circumference. The design of double-row rolling elements effectively increases the contact range with the inner wall of the other leg tube during locking, greatly improving stability.

[0040] In this embodiment of the invention, the outer peripheral surface of the top pressing part 51 has an annular guide surface 510, and the cross-section of the annular guide surface 510 has an oblique outer contour along the axis. It can be understood that as the locking block 3 approaches and moves away from the locking sleeve 5, the annular guide surface 510 releases the inner space of the rolling element 4, reducing its outward top pressure, thus releasing and unlocking it. As a preferred, but not limiting, embodiment, the cross-section of the annular guide surface 510 can be an inclined surface or an arc-shaped surface. Of course, for the above-mentioned two rows of circumferentially distributed wheel designs, this solution also adapts to the design of setting double annular guide surfaces 510, respectively corresponding to a single row of rolling elements 4.

[0041] In this embodiment of the utility model, the locking linkage block 2 is an important accessory for the unlocking operation. Its specific structure includes: a positioning part 21; a first connecting end 22, which is located on the upper side of the positioning part 21 and has a threaded connection on its outer peripheral surface, wherein the locking pressure block 3 is sleeved on the first connecting end 22 and located on the upper side of the positioning part 21; a second connecting end 23, which is located on the lower side of the positioning part 21, wherein the locking sleeve 5 is connected to the second connecting end 23; and a mounting hole 201, which penetrates the positioning part 21, the first connecting end 22 and the second connecting end 23, for the inner tube 8 to pass through.

[0042] Specifically, it also includes a locking nut 1, which is connected to the first connecting end 22 and presses against the locking sleeve 5. It can be connected to the locking sleeve 5 through the locking nut 1. In this solution, it can also be connected to the locking sleeve 5 through a threaded part on the outside of the second connecting end 23. In application, since the locking pressure block 3 abuts against the other leg tube 91 through the rolling element 4, and the structure of the rolling element 4 prevents it from rotating relative to the other leg tube 91, when the locking linkage block 2 rotates, the locking nut 1 connected to the locking pressure block 3 is in a non-rotating state relative to the locking linkage block 2. Thus, under the action of the threaded connection part of the first connecting end 22, the locking nut 1 produces an axial upward movement effect, thereby realizing the unlocking function.

[0043] Of course, this solution can also be implemented by connecting the locking nut 1 to the locking pressure block 3, and then connecting it to the locking linkage block 2 in a relatively tight manner. In this way, when unlocking, the locking linkage block 2, the locking nut 1, and the locking pressure block 3 move together relative to the locking sleeve 5 (relying on the threaded engagement between the locking sleeve 5 and the locking linkage block 2).

[0044] For convenience, the locking linkage block 2 can rotate with the inner tube 8. The inner wall of the mounting hole 201 is also provided with an axially extending limiting part 2011, and the outer circumferential surface of the inner tube 8 is provided with a limiting structure 801 that cooperates with the limiting part 2011. In this design, the limiting part 2011 can be a limiting rib protruding along the inner wall of the mounting hole 201, and the corresponding limiting structure of the inner tube 8 is an axial groove that cooperates with the limiting rib. Thus, when the inner tube 8 rotates, it can drive the locking linkage block 2 to rotate by cooperating with the limiting rib. Alternatively, an axial groove can be provided on the inner wall of the mounting hole 201, and corresponding limiting rib structures can be provided on both sides of the outer circumference of the inner tube 8, achieving the same effect.

[0045] In this solution, to prevent the inner tube 8 from moving axially relative to the locking linkage block 2, a limiting ring 80 is provided on the outer side of the inner tube 8. The outer diameter at the location where the limiting ring 80 is installed is increased. Thus, by limiting the axial movement of the limiting ring 80, the axial movement of the inner tube 8 relative to the locking linkage block 2 can be restricted. For example, in this embodiment of the utility model, a recessed recess 511 is provided on the locking sleeve 5. A lower through hole is provided in the recess 511 for the inner tube 8 to pass through. Thus, the recess 511 naturally forms a platform that abuts against the lower end of the limiting ring 80. After the locking linkage block 2 is installed, the lower end of its second connecting end 23 is located above the limiting ring 80, thereby limiting the limiting ring 80.

[0046] Similarly, in order to facilitate the positioning and installation of the two leg tube assemblies and further limit the rotation of this leg tube assembly relative to the other leg tube, the above-mentioned limiting structure can also be set on the outer periphery of the locking block 3. For example, in this solution, an axial groove is provided on the outer periphery of the locking block 3, and a limiting rib that cooperates with it is provided on the inner wall of the other leg tube.

[0047] This utility model also provides a photography tripod, including a tripod body, which can be a tripod, and each tripod is provided with the above-mentioned leg locking structure.

[0048] It should be understood that the terms "first," "second," etc., are used in this utility model to describe various information, but this information should not be limited to these terms. These terms are only used to distinguish information of the same type from each other. For example, without departing from the scope of this utility model, "first" information can also be referred to as "second" information, and similarly, "second" information can also be referred to as "first" information. In addition, the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," etc., indicate the orientation or positional relationship based on the orientation 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.

[0049] The above description is the preferred embodiment of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications are also considered to be within the protection scope of this utility model.

Claims

1. A leg locking structure, characterized in that, include: Locking sleeve (5) is used to connect with foot tube (9); The locking linkage block (2) is coaxially connected to the locking sleeve (5); The locking block (3) is sleeved on the locking linkage block (2), and the locking block (3) is also provided with a rolling element (4) protruding from its outer surface. When the locking linkage block (2) rotates, the locking block (3) can move relative to the locking sleeve (5).

2. The leg locking structure according to claim 1, characterized in that, The locking block (3) has an inner cavity (301), a portion of the surface of the rolling element (4) is placed inside the inner cavity (301), and the locking sleeve (5) has a pressing part (51) extending into the inner cavity (301), and the pressing part (51) abuts against the rolling element (4), causing the rolling element (4) to tend to move towards the outside of the locking block (3).

3. The leg locking structure according to claim 2, characterized in that, The rolling element (4) is a roller, which is rotatably mounted on the locking block (3), and the roller only rolls in the axial direction.

4. The leg locking structure according to claim 3, characterized in that, There are multiple rolling elements (4), and the multiple rolling elements (4) are distributed along the horizontal circumference on the outer peripheral surface of the locking block (3).

5. A leg locking structure according to claim 3, characterized in that, There are multiple rolling elements (4), and the multiple rolling elements (4) form at least two rows of wheels distributed along the circumference.

6. The leg locking structure according to claim 5, characterized in that, The outer peripheral surface of the top pressing part (51) has an annular guide surface (510), and the cross section of the annular guide surface (510) has an oblique outer contour along the axial direction.

7. A leg locking structure according to any one of claims 1-6, characterized in that, The locking linkage block (2) includes: Positioning section (21); The first connecting end (22) is located on the upper side of the positioning part (21) and has a threaded connection on its outer peripheral surface. The locking block (3) is sleeved on the first connecting end (22) and located on the upper side of the positioning part (21). The second connecting end (23) is located on the lower side of the positioning part (21), and the locking sleeve (5) is connected to the second connecting end (23); The mounting hole (201) passes through the positioning part (21), the first connecting end (22) and the second connecting end (23) for the inner tube (8) to pass through.

8. A leg locking structure according to claim 7, characterized in that, It also includes a locking nut (1), which is connected to the first connecting end (22) and pressed on the locking block (3).

9. A leg locking structure according to claim 7, characterized in that, The inner wall of the mounting hole (201) is also provided with a limiting part (2011) that is opened along the axial direction. The outer circumferential surface of the inner tube (8) is provided with a limiting structure (801) that cooperates with the limiting part (2011). The limiting part (2011) and the limiting structure (801) cooperate to allow the locking linkage block (2) to rotate with the inner tube (8).

10. A photographic tripod, characterized in that, It includes a tripod body, wherein the tripod body is provided with a leg tube locking structure as described in any one of claims 1-9.

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