Telescopic tube and camera tripod comprising same

Abstract

The utility model provides a telescopic tube and including the telescopic tube for photography tripod, the telescopic tube includes the outer tube and the inner tube in the outer tube, also includes the locking subassembly, the locking subassembly includes with the linkage piece of inner tube, the linkage piece is connected with the locking ring that forms the through cavity in the sliding connection, and the locking ring forms the through cavity. The locking ring is assembled in the outer pipe in a sliding manner; when the inner pipe rotates, the linkage piece is driven to rotate, so that the locking ring slides up and down along the outer pipe, and then the locking ring gets close to or away from the outer pipe through the expansion elastic cavity attached to the guide face, and locking or unlocking is achieved. Compared with the telescopic pipe locking in the prior art, the telescopic pipe locking device has the advantages that the locking mechanism is arranged in the pipe, so that the structure is more attractive, and the locking is firm.

Description

Technical Field

[0001] The utility model relates to the technical field of telescopic tubes, in particular to a telescopic tube and a photographic tripod containing the telescopic tube. Background Art

[0002] In the prior art, the following problems exist in the assembly of inner and outer tubes of telescopic tubes:

[0003] 1) In the existing technology, many eccentric locking technologies are used, but the locking is not reliable enough. The guide surface of this patent is a thread, which can be self-locking and not easy to loosen;

[0004] 2) The existing locking mechanism is generally arranged on the outside, which results in the existence of a rotating knob and the like on the outer surface of the entire telescopic tube, making the appearance of the formed telescopic tube not beautiful enough. Utility Model Content

[0005] The utility model aims to provide a telescopic tube and a photographic tripod containing the telescopic tube, which realizes an effect of beautiful appearance on the basis of firm locking through a locking mechanism arranged in the tube.

[0006] In order to achieve the above-mentioned purpose, the utility model is implemented through the following technical solutions.

[0007] The telescopic tube comprises an outer tube and an inner tube located in the outer tube, and also comprises a locking assembly, wherein the locking assembly comprises a linkage member connected to the inner tube, the linkage member is slidably connected with a locking ring forming a through cavity, and the locking ring is slidably assembled in the outer tube;

[0008] When the inner tube rotates, the linkage part is driven to rotate, so that the locking ring slides up and down along the outer tube, and then the expansion elastic cavity that fits the locking ring through the guide surface approaches or moves away from the outer tube to achieve locking or unlocking.

[0009] Furthermore, from top to bottom, the locking ring forms a reduced diameter cavity with a gradually decreasing cross-sectional area, and the reduced diameter cavity forms a guiding surface for the expansion elastic cavity to slide.

[0010] Furthermore, a slide groove is formed in the outer tube, and the locking ring and / or the expansion elastic cavity is located in the slide groove.

[0011] Furthermore, a notch is formed in the upper middle portion of the expansion elastic cavity, and the top of the linkage member extends to form a locking portion matching the notch.

[0012] Furthermore, along the circumferential direction, the expansion elastic cavity is provided with a deformation opening near the notch.

[0013] Furthermore, it also includes a fixing member fixedly connected to the inner tube, and the fixing member is flatly connected to the linkage member.

[0014] Furthermore, a portion of the bottom of the fixing member extends upwardly in an inclined manner to form a slot, and the linkage member is located in the slot.

[0015] Furthermore, it also includes fasteners, which are connected to the fixing member and the linkage member respectively from bottom to top.

[0016] Furthermore, the locking ring is threadedly connected to the middle and lower part of the linkage member.

[0017] The utility model also discloses a tripod for photography, comprising three legs located outside a main axis, the three legs having the same structure, and the legs comprising the telescopic tubes as described above.

[0018] The beneficial effects of the utility model are as follows:

[0019] Firstly, in the utility model, the locking mechanism is arranged inside the tube, and there is no related knob on the outside, so that the structure of the telescopic tube is beautiful. At the same time, when multiple tubes are connected, there is no protruding knob, so the space can be fully utilized.

[0020] Secondly, in the utility model, the operation steps of fixing one tube and rotating the other tube to drive the locking are simplified, which improves the user experience. The unlocking or locking can be completed by simply rotating and applying force.

[0021] Thirdly, the utility model utilizes the reduced diameter cavity formed by the reduced diameter cavity to cooperate with the slide groove and the expansion elastic cavity, etc., so as to cleverly convert the rotational force into pulling and sliding, and then adjust the force of the expansion elastic cavity during the pulling and sliding to lock or unlock the inner tube on the outer tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A schematic diagram of the structure of the telescopic tube provided by the utility model;

[0023] Figure 2 A cross-sectional view of the telescopic tube provided by the utility model;

[0024] Figure 3 A schematic diagram of the structure of the outer tube provided by the utility model;

[0025] Figure 4 An assembly diagram of a photographic tripod provided by the utility model;

[0026] Figure 5 A diagram showing the use state of the supporting legs of the photographic tripod provided by the utility model being unfolded;

[0027] In the figure:

[0028] 100, outer tube; 110, slide groove; 120, fixing piece; 121, slot; 200, inner tube; 210, fastener; 300, locking assembly; 310, linkage piece; 311, locking portion; 320, locking ring; 330, expansion elastic cavity; 331, notch; 332, deformation opening; 400, support leg; 500, main shaft. DETAILED DESCRIPTION

[0029] The present invention is described in detail below in conjunction with the various embodiments shown in the accompanying drawings, but it should be noted that these embodiments are not limitations of the present invention, and any equivalent transformations or substitutions in functions, methods, or structures made by ordinary technicians in the field based on these embodiments are all within the scope of protection of the present invention.

[0030] See attached Figure 1-3 As shown, the telescopic tube in this embodiment includes an outer tube 100 and an inner tube 200 located in the outer tube 100. The inner tube 200 is locked in the outer tube 100 or unlocked by a locking assembly 300 located between the outer tube 100 and the inner tube 200, so that the inner tube 200 slides along the outer tube 100. At the same time, during this process, the entire locking assembly is located inside the tube body and will not be exposed.

[0031] Specifically, the locking assembly 300 in this embodiment includes a linkage member 310 connected to the inner tube 200, the linkage member 310 is slidably connected with a locking ring 320 forming a through cavity, and the locking ring 320 is slidably assembled in the outer tube 100. At this time, the locking ring 320 can move up and down along the outer tube 100;

[0032] When using this embodiment, the inner tube 200 rotates, driving the linkage member 310 to rotate, so that the locking ring 320 slides up and down along the outer tube 100, and then the expansion elastic cavity 330 that is in contact with the locking ring 320 through the guide surface approaches or moves away from the outer tube 100, thereby achieving locking or unlocking. In this embodiment, the outer tube 100 is fixed, and then the inner tube 200 is rotated, so that the inner tube 200 drives the linkage member 310 to rotate in the horizontal direction. At this time, due to the existence of the inclined surface, the locking ring 320 rises and falls along the inclined surface when the linkage member 310 rotates, and then acts on the expansion elastic cavity 330, causing it to expand and fit and lock with the inner wall of the outer tube 100, or the external force is moved away from the expansion ring, and the expansion ring returns to its original state, and then it moves away from the outer tube 100 and approaches the inner tube 200, thereby achieving unlocking.

[0033] In order to form a better inclined guide surface, the locking ring 320 forms a reduced diameter cavity with a gradually decreasing cross-sectional area from top to bottom, and the reduced diameter cavity forms a guide surface for the expansion elastic cavity 330 to slide. At this time, when the linkage rotates, the locking ring slides down or upward along it, and the expansion elastic cavity located outside the inclined surface approaches or moves away from the expansion elastic cavity when the locking ring moves downward or upward along the inclined surface, thereby applying force to the expansion elastic cavity, causing it to generate outward elasticity or perform elastic recovery to achieve locking and unlocking.

[0034] In order to make the locking ring or the expansion elastic cavity slide in the outer tube 100, a slide groove 110 is formed in the outer tube 100, and the locking ring 320 and / or the expansion elastic cavity 330 are located in the slide groove 110. Due to the existence of the slide groove, the locking ring has a certain track when moving up and down, and its movement direction is limited and guided. Similarly, when the expansion elastic cavity is subjected to a certain upward and downward movement tendency, it will also slide along the set direction and position.

[0035] In order to facilitate the cooperation between the locking ring and the expansion elastic cavity, a notch 331 is formed in the upper middle part of the expansion elastic cavity 330, and the top of the linkage member 310 extends to form a locking portion 311 matching the notch 331. The notch is formed so that the linkage member 310 can move closer to or further away from the notch during rotation, thereby achieving assembly and disassembly of the two. Moreover, the existence of the locking portion means that even if the expansion elastic cavity 330 is forced to move up and down, it will be limited to a certain extent due to the existence of the locking portion.

[0036] In order to better lock the inner tube, during the mutual movement, due to the existence of the deformation opening 332 around the expansion elastic cavity 330 and close to the notch 331, the expansion elastic cavity forms an open cavity, and its deformation space will be larger, so that more locking rings with conical structures can be inserted or integrated during locking, so that the contact surface is increased and the locking effect is better.

[0037] In this embodiment, a fixing member 120 is further included which is fixedly connected to the inner tube 100, and the fixing member 120 is flatly connected to the linkage member 310. The fixing member 120 is a tubular structure, and a rectangular surface structure is formed partially along the height direction of the outer side of the tubular structure, so that there is a flat position in the connection surface, and the connection is firm.

[0038] In order to improve the firmness of the connection, the bottom of the fixing member 120 partially extends upwardly and obliquely to form a slot 121, and the linkage member 310 is located in the slot 121. At this time, the setting of the slot enables the lower part of the linkage member to be firmly assembled with the fixing member, and then the two are not easy to separate during locking and unlocking.

[0039] In order to make the fixing member 120, the linkage member 310 and the inner tube 200 more firmly assembled, a fastener 210 is further included, and from bottom to top, the fastener 210 is respectively connected with the fixing member 120 and the linkage member 310. During the specific assembly, the fastener is formed into a screw, and then located in the inner tube, and is threadedly connected with the fixing member and the linkage member in the inner tube from bottom to top.

[0040] In order to achieve better linkage, the locking ring 320 is threadedly connected to the middle and lower part of the linkage member 310. In this connection mode, when the inner tube 200 rotates, the outer tube 100 does not move, and then the inner tube drives the linkage member 310 to rotate. Due to the threaded connection, the locking ring, which is stationary itself, moves up and down relative to the linkage member 310 due to the rotation of the linkage member 310, so as to complete the locking and unlocking.

[0041] In the utility model, the specific assembly and action process are as follows:

[0042] A slide groove 110 is arranged in the outer tube 100 , and a locking ring 320 and an expansion locking member 330 moving along the slide groove 110 are arranged in the slide groove 110 , respectively. The two can be located in different slide grooves 110 .

[0043] A fixing part 120 is fixedly connected to the inner tube 200, and then the fixing part 120 and the linkage part 310 are fixedly connected by the fastener 210. When the inner tube 200 rotates, since the linkage part 310 is threadedly connected to the locking ring 320, the locking ring 320 makes passive and relative up and down movement along the linkage part 130 when the linkage part 130 rotates. At this time, it is close to the expansion locking part 330, approaches the middle and extends into the cavity formed by the expansion locking part 330, so that it is expanded by force, thereby completing the locking assembly of the inner tube and the outer tube.

[0044] In this embodiment, the inner wall of the outer tube 100 may be recessed to form a slide groove 110, or a convex rib may be provided to form the slide groove 110, so that the locking ring 320, the expansion elastic cavity 330 and other parts enter the slide groove and move along the slide groove.

[0045] In this embodiment, the expansion elastic cavity 330 itself will deform under the force, and of course, the purpose of increasing the opening is to make it deform more, and the inclined surface on the locking ring cooperates with the guide, so that when the locking ring moves downward, the expansion elastic cavity will become larger.

[0046] In this embodiment, the linkage member and the fixing member are flatly connected and locked by fastener screws, that is, the linkage member and the fixing member become one.

[0047] In this embodiment, the working principle of locking the outer tube and the inner tube is as follows:

[0048] The outer tube 100 is immobile by default. The inner tube 200 is rotated clockwise by holding the outer wall of the inner tube 200. At this time, the fixing member 120 and the inner tube 200 are integrated, and the fixing member 120 and the linkage member 310 are also integrated. Then, when the inner tube 200 is rotated clockwise, the linkage member 310 will rotate clockwise, and the linkage member 310 and the locking ring 320 are threadedly connected; and the locking ring can only slide up and down in the slide groove 110 formed by the convex ribs on the inner wall of the outer tube 100. Therefore, when the inner tube 200 is rotated clockwise, the locking ring 320 will move downward, so that the expansion elastic cavity 330 will become larger, and then the expansion elastic cavity 330 and the inner wall of the outer tube 100 are tightly locked, so that the outer tube and the inner tube are locked,

[0049] The principle of unlocking the outer tube and the inner tube is as follows: the inner tube is rotated counterclockwise, thereby forming a motion trajectory opposite to the clockwise rotation, thereby unlocking the outer tube and the inner tube.

[0050] See attached Figure 4-5 As shown, the telescopic tube in this embodiment forms a supporting leg 400 in a photographic tripod. There are three supporting legs 400, which are respectively located outside the main shaft 500 and hinged to the outside of the main shaft 500 to achieve adjustment of the angles of the three supporting legs.

[0051] In this embodiment, the three supporting legs 400 form a tripod of different heights by adjusting the inner tube and the outer tube, so that the user can use it according to different scene requirements.

[0052] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0053] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A telescopic tube, comprising an outer tube and an inner tube located in the outer tube, characterized in that: It also includes a locking assembly, the locking assembly includes a linkage member connected to the inner tube, the linkage member is slidably connected to a locking ring forming a through cavity, and the locking ring is slidably assembled in the outer tube; When the inner tube rotates, the linkage part is driven to rotate, so that the locking ring slides up and down along the outer tube, and then the expansion elastic cavity that fits the locking ring through the guide surface approaches or moves away from the outer tube to achieve locking or unlocking.

2. The telescopic tube according to claim 1, characterized in that: From top to bottom, the locking ring forms a reduced diameter cavity with a gradually decreasing cross-sectional area, and the reduced diameter cavity forms a guiding surface for the expansion elastic cavity to slide.

3. The telescopic tube according to claim 2, characterized in that: A slide groove is formed in the outer tube, and the locking ring and / or the expansion elastic cavity is located in the slide groove.

4. The telescopic tube according to claim 1, characterized in that: A notch is formed in the upper middle portion of the expansion elastic cavity, and a locking portion matching the notch is formed by extending from the top of the linkage member.

5. The telescopic tube according to claim 4, characterized in that: Along the circumferential direction, the expansion elastic cavity is provided with a deformation opening near the notch.

6. The telescopic tube according to claim 1, characterized in that: It also includes a fixing member fixedly connected to the inner tube, and the fixing member is flatly connected to the linkage member.

7. The telescopic tube according to claim 6, characterized in that: The bottom of the fixing member partially extends upwardly and obliquely to form a slot, and the linkage member is located in the slot.

8. The telescopic tube according to claim 7, characterized in that: It also includes fasteners, which are connected to the fixing member and the linkage member respectively from bottom to top.

9. The telescopic tube according to claim 1, characterized in that: The locking ring is threadedly connected to the middle and lower part of the linkage member.

10. A tripod for photography, characterized in that: It comprises three legs located outside the main shaft, the three legs have the same structure, and the legs comprise the telescopic tube as claimed in any one of claims 1-9.

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