A central shaft for a camera tripod

Abstract

A central shaft for a camera tripod, characterized in that it consists of a first shaft section (1) and a second shaft section (2), which are detachably connected to each other; The first shaft section (1) is equipped with a snap-lock section (121), while the second shaft section (2) comprises a locking axis (231) that can be inserted into the first shaft section (1), at the end of the locking axis (231) there is a snap block (2311), the snap block (2311) locks with the snap-lock section (121) to connect the first shaft section (1) and the second shaft section (2); The second shaft section (2) also includes a locking part (232), the locking part (232) holds the locking axis (231) in the position in which it is connected to the first shaft section (1) in the locked position.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS

[0001] This application claims priority to Chinese Patent Application No. 202323657409.4, filed on December 29, 2023, entitled “A quick release mechanism for a central shaft for a photographic tripod,” the entire contents of which, as well as amendments, are incorporated by reference into this application.

[0002] This application also claims priority to Chinese Patent Application No. 202420161667.9, filed on January 23, 2024, entitled “A release component for an adjustment part and a photographic tripod using the same,” the entire contents of which, as well as amendments, are incorporated by reference into this application. TECHNICAL FIELD

[0003] The present utility model relates to the technical field of photo tripods, in particular to a central shaft for a photo tripod. STATE OF THE ART

[0004] A camera tripod, also known as a tripod, is a support structure used to stabilize cameras. It plays an important role in photography and videography, helping photographers achieve the desired effects.

[0005] To meet different shooting needs and changes in perspective, the height of a photography tripod usually needs to be adjusted. Depending on the subject and composition requirements, photographers can adjust the height of the tripod to adjust the camera angle and height accordingly and achieve more satisfactory results. For example, landscape or architectural photography may require placing the camera at a lower position to obtain a wider angle of view. However, portrait or macro photography might require placing the camera at a higher position to achieve better composition and perspective. Height adjustment is therefore of great importance for photographers, as it helps them maintain control over the shooting situation and achieve optimal results.

[0006] Therefore, the central shaft for photo tripods can usually be adjusted in height even when the tripod is fully extended. There are various ways to make the central shaft height adjustable, one of which is to design the central shaft as a multi-section, telescopic unit. However, in some situations, fully retracting the central shaft to its minimum position is not sufficient to meet the requirements of low-position shooting. In such cases, it is necessary to remove one or more sections of the central shaft. In previous technology, however, the disassembly and assembly of multi-section central shafts is often not designed as a quick-change mechanism. Instead, it requires the use of tools, which complicates operation and impairs user-friendliness. CONTENTS OF THE PRESENT UTILITY MODEL

[0007] The present utility model provides a central shaft for a photo tripod to solve the problems posed by the prior art described above.

[0008] To achieve the above-mentioned purpose of the utility model, the following technical solutions are used in the utility model: A central shaft for a photographic tripod, comprising a first and a second shaft portion which are detachably connected to each other; the first shaft portion is provided with a snap-in portion, while the second shaft portion comprises a locking shaft which can be inserted into the first shaft portion, at the end of the locking shaft there is a snap-in block which locks with the snap-in portion to connect the first and second shaft portions; the second shaft portion further comprises a locking part which, in the locked position, holds the locking shaft in the position in which it is connected to the first shaft portion.

[0009] Furthermore, the first shaft portion includes a first outer tube and a first inner liner secured inside the first outer tube; the snap-fit ​​portion is formed on the first inner liner.

[0010] Furthermore, the lower surface of the snap-lock portion is a tapered surface that gradually rises from bottom to top in the snap-lock direction.

[0011] Furthermore, the snap-fit ​​portion is formed in the first shaft portion, wherein the snap-fit ​​portion has a flat surface.

[0012] Furthermore, the snap block is a projection provided at the end of the locking shaft.

[0013] Furthermore, the second shaft portion comprises a second outer tube and a second inner liner fixed within the second outer tube, wherein the locking axis is screwed into the second inner liner, wherein the locking axis is slidably mounted in the second inner liner in its axial direction.

[0014] Furthermore, the locking axis is mounted in the second shaft section so that it can be displaced in its axial direction.

[0015] Furthermore, the second shaft portion has a projection, and the lower end of the first shaft portion is formed to be connected to the sleeve of the projection of the second shaft portion.

[0016] Furthermore, one end of the locking part is pivotally connected to one end of the locking axis remote from the snap block.

[0017] Furthermore, the first shaft portion and the second shaft portion are polygonal, and in the unlocked state of the first shaft portion and the second shaft portion, the sides of the first shaft portion and the second shaft portion are not aligned, and in the locked state of the first shaft portion and the second shaft portion, the sides of the first shaft portion and the second shaft portion are aligned with each other.

[0018] Technical advantage of this utility model: By arranging a snap-lock portion in the first shaft portion and a locking shaft in the second shaft portion that can be inserted into the first shaft portion, wherein at the end of the locking shaft there is a snap block that locks with the snap-lock portion to connect the first and second shaft portions. The second shaft portion further comprises a locking part that, when locked, holds the locking shaft in the position in which it is connected to the first shaft portion. This design ensures quick and easy handling during assembly and disassembly. At the same time, the locking part, when locked, ensures that the first and second shaft portions are firmly connected to one another, which ensures the stability and reliability of the connection. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The attached drawings of the instructions, which are part of this application, are intended to provide a better understanding of the present utility model. The schematic embodiments and their explanations are intended to explain the present utility model and do not constitute an undue limitation of the present utility model. In the drawings: Fig. 1 is a schematic structural representation of the present utility model; Fig. Figure 2 shows a schematic representation of the disassembled structure of the quick-release mechanism for a central shaft made of Fig. 1; Fig. 3 shows an exploded view of the quick release mechanism for a central shaft of Fig. 1; Fig. 4 shows a schematic representation of another embodiment of the first shaft section of the quick release mechanism for a central shaft of Fig. 1; Fig. 5 shows a cross section of the first shaft section of Fig. 4; Fig. Figure 6 shows a schematic representation of the quick release mechanism for a central shaft made of Fig. 1 before locking; Fig. Figure 7 shows a cross-section of the quick release mechanism for a central shaft made of Fig. 6 before locking; Fig. Figure 8 shows a cross-section of the quick release mechanism for a central shaft made of Fig. 1 after locking. Fig. 9 shows a schematic representation of the lower structure of the second shaft section of Fig. 1; Fig. Figure 10 shows a schematic representation of the disassembled structure of the adjustment part of the quick-release mechanism for a central shaft made of Fig. 1; Fig. 11 shows a schematic representation of the setting part of Fig. 10; Fig. 12 shows an exploded view of the adjustment part of Fig. 11; Fig. 13 shows a cross section of the quick release mechanism for a central shaft made of Fig. 10, in which the adjustment part is installed; Fig. 14 shows a schematic representation of the body of the adjustment part of Fig. 11; Fig. 15 shows a schematic representation of the body of the adjustment part of Fig. 11 from a different perspective; Fig. 16 shows a schematic diagram of the structure of the installation connection part of the body of the adjustment part of Fig. 11; Fig. 17 shows a schematic representation of another embodiment of the second shaft section of the quick release mechanism for a central shaft of Fig. 1.

[0020] Symbols of the drawings: 1. first shaft section; 11. first outer tube; 12. first inner liner; 121. snap-lock section; 2. second shaft section; 21. second outer tube; 211. groove; 22. second inner liner; 231. locking axis; 2311. snap-block; 232. locking part; 233. pivot pin; 24. cavity; 3. unlocking component; 31. adjustment part; 311. upper part of the adjustment part; 312. connecting plate; 313. lower part of the adjustment part; 314. mounting unit; 3141. receiving cavity; 3142. sliding body; 32. main part; 321. mounting cavity; 322. step-like structure; 323. locking cavity; 324. Rotary slide rail; 325. Movable rail; 326. Support surface; 327. First vertical slide rail; 33. Connecting part; 331. Support circle; 332. Locking block; 333. Engagement area; 334. Second vertical slide rail; 34. Mounting part; 35. Return component; 36. Cover plate. DETAILED DESCRIPTION

[0021] In the following, the technical solution of the present utility model is described clearly and completely using the exemplary embodiments and the accompanying drawings. It is obvious that the described exemplary embodiments represent only a part of the exemplary embodiments of the present utility model and do not encompass all exemplary embodiments. The following description of at least one exemplary embodiment is in fact only illustrative and in no way represents a limitation of the present utility model, its application, or use. All other exemplary embodiments achieved by those skilled in the art without creative effort based on the exemplary embodiments of the present utility model also fall within the scope of protection of the present utility model.

[0022] It should be noted that the terms used herein are intended to describe specific embodiments only and are not intended to limit the exemplary embodiments of the present application described below. The singular form used herein includes the plural form unless the context clearly indicates otherwise. Furthermore, the term "comprises" and / or "including" in this specification indicates the presence of features, steps, acts, devices, components, and / or combinations thereof.

[0023] It should be noted that, unless otherwise specified, the relative arrangement, numerical expressions, and values ​​of the components and steps explained in these embodiments do not limit the scope of the present utility model. Likewise, it should be understood that the sizes of the various parts shown in the drawings are not drawn to actual scale for convenience of description. Techniques, methods, and devices already known to those skilled in the relevant art may not be discussed in detail, but should be considered part of the description provided where applicable. In all examples shown and discussed, specific values ​​should be considered exemplary and not limiting. Therefore, other examples of the exemplary embodiment may have different values.It should be noted that similar numbers and letters in the following drawings represent similar elements, so that once an element has been defined in one drawing, it does not need to be explained further in the following drawings.

[0024] As in the Fig. As shown in Figures 1 to 17, a central shaft for a photographic tripod comprises a first shaft portion 1 and a second shaft portion 2, which are detachably connected to each other. The first shaft portion 1 is equipped with a snap-lock portion 121, while the second shaft portion 2 comprises a locking shaft 231 that can be inserted into the first shaft portion 1. At the end of the locking shaft 231 is a snap-lock block 2311. The snap-lock block 2311 locks with the snap-lock portion 121 to connect the first shaft portion 1 and the second shaft portion 2; the second shaft portion 2 further comprises a locking part 232. The locking part 232, in the locked position, holds the locking shaft 231 in the position in which it is connected to the first shaft portion 1.The locking member 232 may be a wrench or a knob; a wrench is preferred for square pipes and a knob is preferred for round pipes.

[0025] A central shaft provided by the present utility model enables quick and easy handling during assembly and disassembly. At the same time, the locking part 232 ensures that the first shaft section 1 and the second shaft section 2 are firmly connected to one another in the locked state, ensuring the stability and reliability of the connection. In this embodiment, the locking part 232 can be a locking wrench or a locking knob. For example, the locking wrench is advantageous for block-like structures, while the locking knob is preferred for tubular structures.

[0026] As in the Fig. 3, Fig. 7 and Fig. As shown in Figure 8, the first shaft portion 1 includes a first outer tube 11 and a first inner liner 12 secured inside the first outer tube 11; the snap-fit ​​portion 121 is formed on the first inner liner 12. The first outer tube 11 may be selected from a metal material with good corrosion resistance and high hardness (such as stainless steel or aluminum alloy), while the first inner liner 12 may be made of a wear-resistant plastic material (such as PEEK or PC). Metal parts offer high strength and are less susceptible to damage, while plastic parts can be easily machined to create structures such as the snap-fit ​​portion 121 to enable easy cooperation with the locking axis 231.

[0027] The snap closure portion 121 is arranged on the top side of the first inner lining 12. In this embodiment, as in Fig. As shown in Figure 3, the snap-lock portion 121 is designed as a groove whose underside forms a sloped surface that gradually increases from bottom to top in the snap direction. As a result, during the locking process of the locking axis 231 with the first inner lining 12, the first shaft portion 1 and the second shaft portion 2 can be drawn together and pressed against one another to ensure a reliable and stable connection. In this embodiment, two snap-lock portions 121 are provided, and the two snap-lock portions 121 are arranged symmetrically about the center.

[0028] In other embodiments (not shown in the figures), the two snap-lock sections 121 can also be arranged asymmetrically, and the number of snap-lock sections 121 can be increased to three. Three snap-lock sections can provide an even more stable connection and prevent wobbling. As shown in the Fig. 3, Fig. 7 and Fig. As shown in Figure 8, the second shaft portion 2 comprises a second outer tube 21 and a second inner liner 22 secured within the second outer tube 21, with the locking axis 231 screwed into the second inner liner 22. The second outer tube 21 may be selected from a metal material with good corrosion resistance and high hardness (such as stainless steel or aluminum alloy), while the second inner liner 22 may be made of a wear-resistant plastic material (such as PEEK or PC). Metal parts offer high strength and are less susceptible to damage, while plastic parts can be easily machined to form the holes and structures for the passage of the locking axis 231, while reducing wear between the locking axis 231 and the component.

[0029] The locking shaft 231 is mounted in the second inner lining 22 for displacement in its axial direction. A snap block 2311 is located at the end of the locking shaft 231 facing the first shaft section 1. In this embodiment, the snap block 2311 is a terraced projection attached to the end of the locking shaft 231. The snap block 2311 is divided into two pieces and arranged symmetrically around the center. One end of the locking part 232 is pivotally mounted via a pivot pin 233 at the end of the locking shaft 231 opposite the snap block 2311. The extension direction of the pivot pin 233 is radial to the locking axis 231. The locking part 232 has a bulge at the end connected to the pivot pin 233 so that the locking part 232 can rotate about the pivot pin 233 to switch between the locking and unlocking states.In other embodiments (not shown in the figures), the number of snap blocks 2311 may be three, which corresponds to the number of snap-lock sections 121. The snap block 2311 may also assume other geometric shapes, such as a rectangular bulge or a polygonal bulge.

[0030] In other embodiments (not shown in the figures), the snap block 2311 may also be in the form of a V-shaped, spring-loaded snap, a ball snap, etc. The V-shaped, spring-loaded snap is firmly locked by elastic compression, while the ball snap achieves locking through embedded balls. The design of the ball snap is simple and efficient, and when the ball snap hits the locking groove 121, the ball is automatically inserted into the locking groove 121, creating a tight connection.

[0031] Furthermore, a projection is provided at one end of the second inner liner 22 toward the first shaft portion 1, and the lower end of the first inner liner 12 is equipped with a sleeve that is fittingly connected to the projection. In this embodiment, the sleeve and the projection have a triangular shape. The connection of the sleeve and the projection prevents rotation from occurring between the first shaft portion 1 and the second shaft portion 2 due to shaking or external forces, which loosens the connection between the snap block 2311 and the snap-lock portion 121. As a result, when the locking part 232 is unlocked, the first shaft portion 1 can rotate relative to the second shaft portion 2 and simultaneously separate along the axis, thereby releasing the lock.

[0032] In other embodiments (not shown in the figures), the shape of the sleeve and the projection may also be rectangular or polygonal.

[0033] Furthermore, as in the Fig. 1, Fig. 6 and Fig. 8 shows the first shaft section 1 and the second shaft section 2 in the present exemplary embodiment, each prismatic in the shape of a triangle. In the unlocked state of the first shaft section 1 and the second shaft section 2, the sides of the first shaft section 1 and the second shaft section 2 are not aligned, and in the locked state of the first shaft section 1 and the second shaft section 2, the sides of the first shaft section 1 and the second shaft section 2 are aligned with one another. This arrangement makes it possible to clearly and easily determine whether the first shaft section 1 and the second shaft section 2 are locked or not.

[0034] In other embodiments (not shown in the figures) it may also take on other polygonal or round geometries or other geometric shapes.

[0035] During use, the locking shaft 231 of the second shaft portion 2 is inserted into the first shaft portion 1 and rotated by a certain angle so that the end portion of the locking shaft 231 with the snap block 2311 penetrates the inclined snap-lock portion 121 of the first inner lining 12 of the first shaft portion 1. During this process, the first shaft portion 1 is pulled downward to ensure a tight fit with the second shaft portion 2. After the snap-locking, the locking part 232 is actuated to secure a firm connection between the two shaft portions.To separate the first shaft section 1 and the second shaft section 2, the locking part 232 is first released and then the first shaft section 1 is rotated in the opposite direction, so that the end part of the locking axis 231 with the snap block 2311 is rotated out of the snap-lock section 121 of the first inner lining 12 of the first shaft section 1. The first shaft section 1 can then be separated from the second shaft section 2 by simultaneous rotation and pulling movement.

[0036] In another embodiment, as in Fig. 4 and Fig. 5, this embodiment differs from the one described above in that the first shaft portion 1 may not have a first inner lining 12, and the snap-fit ​​portion 121 is disposed inside the first shaft portion 1, with the snap-fit ​​portion 121 having a flat shape. The integrated structure allows for reduced manufacturing costs and assembly steps, thereby reducing the risk of malfunctions due to improper assembly or loosening of components, resulting in a simplified structure and increased reliability.

[0037] In another embodiment, as in Fig. As shown in Figure 17, this embodiment differs from the one described above in that the second shaft portion 2 may not have a second inner lining 22, and the locking axis 231 is directly inserted into the second shaft portion 2. The integrated structure allows for reduced manufacturing costs and assembly steps, thereby reducing the risk of malfunctions due to improper assembly or loosening of components, resulting in a simplified structure and increased reliability.

[0038] From the above description of the specific embodiments, it is clear that the quick-release mechanism for a central shaft for a photo tripod provided by this utility model has the following structure. The first shaft portion 1 is equipped with a snap-lock portion 121, while the second shaft portion 2 includes a locking shaft 231 that can be inserted into the first shaft portion 1. At the end of the locking shaft 231 is a snap-lock block 2311. The snap-lock block 2311 locks with the snap-lock portion 121 to connect the first shaft portion 1 and the second shaft portion 2. The second shaft portion 2 further includes a locking part 232. In the locked position, the locking part 232 holds the locking shaft 231 in the position in which it is connected to the first shaft portion 1.This device enables quick disassembly and assembly and at the same time, the locking part 232 in the locked state ensures that the first shaft section 1 and the second shaft section 2 are firmly connected to each other, which ensures the stability and reliability of the connection.

[0039] As in Fig. 1, Fig. 11, Fig. 12 and Fig. As shown in Figure 13, in this embodiment, an adjustment part 31 is provided at the end of the second shaft portion 2 remote from the quick-release mechanism. The adjustment part 31 is equipped with an unlocking component 3, which serves to unlock the adjustment part 31 from the second shaft portion 2. In this embodiment, the adjustment part 31 has a shape such as a hook or a ring.

[0040] The second shaft portion 2 has a cavity 24 inside. The release component comprises a main part 32 with a mounting cavity 321 and a connecting part 33. The connecting part 33 extends partially out of the mounting cavity 321 and engages the cavity 24.

[0041] In another embodiment (not shown in the figures), the adjustment part 31 can be arranged at the end of the first shaft section 1 remote from the quick release mechanism, wherein the first shaft section 1 has a cavity 24 inside and the unlocking component 3 engages in the cavity 24 of the first shaft section 1.

[0042] As in Fig. As shown in Figures 13 to 16, in this embodiment, a rotary slide rail 324 is incorporated into the main part 32 to ensure a stable connection between the main part 32. The movable rail 325 extends inward and forms a support surface 326 for the connecting part 33. Thus, the connecting part 33 has a sufficient support and load-bearing surface when moving vertically.

[0043] After the mounting part, such as a screw, is connected to the adjustment part 31, it has a certain weight. In this case, the inner wall of the connecting part 33 extends inward, forming a support circle 331 for the screw head (i.e., the head of the mounting part). When the adjustment part 31 is under pressure, it moves upward. At this time, the mounting part moves upward in the main part 32 and away from the support circle 331, while the cover plate serves a good limiting function.

[0044] To enable subsequent resetting, in this embodiment, a return component 35 is mounted on the screw thread of the screw shaft. After pressing and turning, the return component 35 compresses, and as soon as the pressure is released, the return component 35 returns, causing the entire adjustment part 31, the main part 32, and the connecting part 33 to move downward and detach from the second shaft section 2. In this embodiment, the return component 35 is a return spring.

[0045] In other embodiments of the return component 35 (not shown in the figures), the return component 35 can also be replaced by other elastic components, such as spring plates or rubber mats as the return component 35. Depending on the specific application requirements and scenarios, the appropriate elastic component can be selected to realize the return function.

[0046] As in the Fig. 11, Fig. 13, Fig. 14 and Fig. 16, in this embodiment, when the adjustment part 31 is positioned at the designated position of the mounting cavity 321, the connecting part 33 is locked to the second shaft portion 2. When the adjustment part 31 is removed from the designated position by a force, the adjustment part 31, together with the connecting part 33, enters the rotary slide rail 324 of the mounting cavity 321. By rotating the adjustment part 31, the connecting part 33 is rotated along the mounting cavity 321, thereby separating the main body 32, the connecting part 33, and the adjustment part 31 from the second shaft portion 2 and completing the unlocking. In practical use, a fixed or locked position is generally provided in the second shaft portion 2. This fixed or locked position corresponds to the fixed position in this embodiment.This position can be adjusted depending on the application scenario and other factors and can be changed in the second shaft section 2. As shown in . Fig. 9, Fig. 12 and Fig. 13, in this embodiment, a groove 211 is provided on the inner wall of the cavity 24 of the second shaft portion 2. A locking block 332 of matching design is arranged on the connecting part 33. The locking block 332 has an engagement portion 333. When the entire adjustment part 31 is actuated by pressing the adjustment part 31, the engagement portion 333 moves to a position that is level with and offset from the groove 211. Thereafter, the engagement portion 333 rotates horizontally, thereby either engaging or disengaging from the groove 211, thus enabling locking or unlocking of the second shaft portion 2. In this embodiment, the rotary slide rail 311 mates with the underside of the main part 32, causing the main part 32 to rotate and effecting unlocking.

[0047] To facilitate the connection between the main part 32 and the adjustment part 31, a mounting part 34 is also provided. The mounting part 34 is inserted through the main part 32 and connected to the adjustment part 31, with a cover plate 36 provided at the top, which represents an upper limit for the mounting part 34. In this exemplary embodiment, the mounting part 34 can be a screw, a stepped axle, a rivet connection, or an adhesive to establish a first connection between the main part 32 and the adjustment part 31.

[0048] As in Fig. As shown in Figures 12 to 14, the adjustment part 31 in this embodiment consists of three parts: the upper part of the adjustment part 311, the lower part of the adjustment part 313, and the connecting plate 312 that connects the two. After being pressed, the connecting plate 312 moves into the rotary slide rail 324 below the main body 32, forming the basis for subsequent use. Specifically, the upper part of the adjustment part forms a mounting unit 314 with a receiving cavity 3141, and the outer side of the mounting unit 314 forms a sliding body 3142.

[0049] Due to the vertical movement during printing and resetting, the connecting part 33 forms a first vertical slide rail 327, and the main body 32 forms a second vertical slide rail 334. The first vertical slide rail 327 and the second vertical slide rail 334 serve to vertically move the adjustment part 31. When the connecting plate enters the rotation slide rail 324, the sliding body moves along the second vertical slide rail 334 of the connecting part 33 or the first vertical slide rail 327 in the main body 32. In this embodiment, the arrangement of the first vertical slide rail 327 in the main body 32 limits the rotation of the connecting part 33. At this time, the sliding body of the adjustment part 31 is located on both the first vertical slide rail 327 of the main body 32 and the second vertical slide rail 334 of the connecting part 33.Thus, by restricting the rotation of the adjustment part 31, the rotation of the connecting part 33 is also restricted. Whenever possible vertical movement occurs, the adjustment part 31 moves along the second vertical slide rail 334 in the connecting part 33, and the connecting part 33 moves along the first vertical slide rail 327 in the main part 32. In this embodiment, the second vertical slide rail 325 serves to prevent rotation of the connecting part 33 when no force is applied to the mounting cavity 321. The connecting part 33 is provided with a second vertical slide rail 334, which ensures that the adjustment part 31 can move up and down in the connecting part 33 when a vertical left-right force is applied to the adjustment part 31, and that the connecting part 33 is rotated when a rotational force is applied.

[0050] In order to facilitate entry into the rotary slide rail 324, a step-like structure 322 extends outwardly below the mounting cavity 321 of the main part 32, and the rotary slide rail 324 is formed in the step-like structure 322.

[0051] As in Fig. 10, Fig. 11 and Fig. 15, in this embodiment, when assembling the main body 32 and the connecting part 33, a locking cavity 323 is provided at a predetermined position on the inner wall of the mounting cavity 321 of the main body 32, and a mating locking block 332 is provided on the outer side of the connecting part 33. Thus, rotational locking and unlocking between the locking cavity 323 and the locking block 332 is achieved, while under compression, only the mounting part 34 and the adjusting element 31 can be vertically moved synchronously within the main body 32 and the adjustment part 33.

[0052] In summary, it can be seen from the above description that the present utility model achieves the following technical effects: The present utility model provides a quick-release mechanism for a central shaft for a photographic tripod. The first shaft section 1 is equipped with a snap-lock section 121, while the second shaft section 2 includes a locking shaft 231 that can be inserted into the first shaft section 1. At the end of the locking shaft 231 is a snap-lock block 2311. The snap-lock block 2311 locks with the snap-lock section 121 to connect the first shaft section 1 and the second shaft section 2. The second shaft section 2 also includes a locking part 232. In the locked position, the locking part 232 holds the locking shaft 231 in the position in which it is connected to the first shaft section 1.This device enables quick disassembly and assembly, and at the same time, the locking part 232, in the locked state, ensures that the first shaft section 1 and the second shaft section 2 are firmly connected to each other, ensuring the stability and reliability of the connection. Locking or unlocking the adjustment part 31 is mainly achieved by exerting pressure on the adjustment part 31 so that this adjustment part 31 enters or exits a predetermined height. A groove 211 is provided on the second shaft section 2 for securing the connecting part 31. By rotating, the connecting part is rotated into or out of the groove 211, thereby locking or unlocking the adjustment part 32 on the second shaft section 2 using the connecting part 33.

[0053] In the description of this utility model, it should be understood that the directional terms such as "front, back, top, bottom, left, right," "horizontal, vertical, perpendicular," and "top, bottom" generally indicate the direction or positional relationship based on the orientation shown in the drawings. These terms are merely intended to simplify the description of this utility model and to improve comprehensibility. Unless otherwise stated, these directional terms do not imply that the specified devices or parts must have a particular orientation or construction in a specific direction. They therefore do not represent a limitation of the scope of protection of this utility model. The terms "inside" and "outside" refer to the inside and outside of the outlines of the respective components.

[0054] For ease of description, spatial relative terms such as "above...", "on top of...", "on the upper surface of...", or "over" may be used herein to describe the spatial relationship of a device or feature to other devices or features as illustrated in the figures. It should be understood that the spatial relative terms are intended to describe not only the orientation of the device in the figure, but also to encompass other orientations in use or operation. For example, if the device illustrated in the figure is inverted, a device described as being "above other devices or structures" or "on top of other devices or structures" would, after inversion, be positioned as "below other devices or structures" or "under other devices or structures." Therefore, the exemplary term "above..." can mean both "above..." and "over..."' and 'below...' The device may also be positioned in other ways (e.g., rotated 90 degrees or in a different orientation), and the spatial relative description here should be explained accordingly.

[0055] It should also be clarified that the terms "first," "second," etc., are used to identify components to distinguish them from one another. Unless otherwise stated, these terms have no specific meaning and should therefore not be understood as limiting the scope of protection of this utility model.

[0056] The above-mentioned embodiments are merely preferred embodiments of the present utility model and are not intended to limit the invention. Various modifications and variations of the present utility model are possible for those skilled in the art. Any modifications, equivalent replacements, improvements, etc., made within the spirit and principles of the present utility model should also be included within the scope of protection of this present utility model. QUOTES CONTAINED IN THE DESCRIPTION

[0000] This list of documents submitted by the applicant was generated automatically and is included solely for the convenience of the reader. This list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions. Cited patent literature

[0000] CN 202323657409.4

[0001] CN 202420161667.9

[0002]

Claims

[1] A central shaft for photo tripod, characterized by that it consists of a first shaft section (1) and a second shaft section (2) which are removably connected to one another; The first shaft portion (1) is provided with a snap-in portion (121), while the second shaft portion (2) comprises a locking shaft (231) that can be inserted into the first shaft portion (1). At the end of the locking shaft (231) there is a snap-in block (2311), the snap-in block (2311) locks with the snap-in portion (121) to connect the first shaft portion (1) and the second shaft portion (2); The second shaft section (2) further comprises a locking part (232), the locking part (232) in the locked position holds the locking axis (231) in the position in which it is connected to the first shaft section (1). [2] Central shaft for photo tripod according to claim 1, characterized by in that the first shaft portion (1) comprises a first outer tube (11) and a first inner lining (12) which is fastened inside the first outer tube (11); the snap-lock portion (121) is formed on the first inner lining (12). [3] Central shaft for photo tripod according to claim 2, characterized by that the lower surface of the snap-lock portion (121) is a beveled surface which gradually rises from bottom to top in the snap direction. [4] Central shaft for photo tripod according to claim 1, characterized by that the snap-fit ​​portion (121) is formed in the first shaft portion (1), wherein the snap-fit ​​portion (121) has a flat surface. [5] Central shaft for photo tripod according to claim 4, characterized by that the snap block (2311) is a bulge provided at the end of the locking shaft (231). [6] Central shaft for photo tripod according to claim 1, characterized byin that the second shaft portion (2) comprises a second outer tube (21) and a second inner lining (22) which is fastened within the second outer tube (21), wherein the locking axis (231) is screwed into the second inner lining (22), wherein the locking axis (231) is mounted in the second inner lining (22) so as to slide in its axial direction. [7] Central shaft for photo tripod according to claim 1, characterized by that the locking axis (231) is mounted in the second inner lining (2) so as to be displaceable in its axial direction. [8] Central shaft for photo tripod according to claim 6, characterized by that the second shaft portion (2) has a projection and the lower end of the first shaft portion (1) is designed to be connected to the sleeve of the projection of the second shaft portion (2). [9] Central shaft for photo tripod according to claim 1, characterized bythat one end of the locking part (232) is pivotally connected to one end of the locking axis (231) remote from the snap block (2311). [10] Central shaft for photo tripod according to claim 1, characterized by that the first shaft section (1) and the second shaft section (2) are polygonal, and in the unlocked state of the first shaft section (1) and the second shaft section (2), the sides of the first shaft section (1) and the second shaft section (2) are not aligned, and in the locked state of the first shaft section (1) and the second shaft section (2), the sides of the sides of the first shaft section (1) and the second shaft section (2) are aligned with one another.

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