Rapid butt joint structure for center shaft of photographic tripod

Abstract

The utility model discloses a fast butt joint structure for a center shaft of a photographic tripod, which comprises a connecting rod mechanism movably arranged on the center shaft and a locking sleeve arranged on a connector, the connecting rod mechanism is connected with a shifting mechanism, and the connecting rod mechanism is provided with a jacking structure capable of moving along the axial direction. And the shifting mechanism drives the jacking structure to move axially through the connecting rod mechanism, so that the jacking structure and the locking sleeve form a locking or unlocking state. According to the fast butt joint structure for the center shaft of the photographic tripod, through linkage of the shifting arm and the connecting rod mechanism, one-key type locking and unlocking are achieved, and the operation efficiency is improved; in addition, the marble, the locking inclined surface and the conical guide surface are matched to form a locking state, so that firm locking is ensured, and looseness is prevented.

Description

TECHNICAL FIELD

[0001] The utility model relates to a photographic tripod middle shaft quick butt joint structure. BACKGROUND

[0002] The current photographic tripod middle shaft dismounting adopts thread screwing or buckle type connection, the thread screwing operation is time-consuming, and after repeated use for many times, the thread is prone to wear; the buckle type connection is usually connected through the plug-in mode of the convex and the groove, the manufacturing tolerance of multiple parts is superimposed, resulting in the radial gap between the middle shaft and the connecting head, and the problem of looseness is prone to occur. UTILITY MODEL CONTENTS

[0003] The utility model aims at solving one of the technical problems in the prior art.

[0004] In order to solve the above-mentioned technical problems, the utility model adopts the following technical scheme:

[0005] A photographic tripod middle shaft quick butt joint structure, including the connecting rod mechanism movably arranged on the middle shaft and the locking sleeve arranged on the connecting head, the connecting rod mechanism is connected with the actuating mechanism, the connecting rod mechanism is provided with the top pressure structure that can move in the axial direction, the actuating mechanism drives the top pressure structure to move in the axial direction through the connecting rod mechanism, so that the top pressure structure and the locking sleeve form the locking or unlocking state.

[0006] Preferably, the top pressure structure includes a fixed cylinder arranged on the connecting rod mechanism, a movable table is movably arranged on the outer periphery of the fixed cylinder, and a plurality of elastic balls are uniformly distributed on the movable table in the radial direction.

[0007] Preferably, a locking inclined surface is arranged on the inner side wall of the locking sleeve, an installation cavity is formed in the movable table, a moving block with a tapered guide surface is movably arranged in the installation cavity, and the tapered guide surface can push the elastic ball against the locking inclined surface.

[0008] Preferably, the connecting rod mechanism includes a transmission rod symmetrically arranged on the fixed cylinder, and a cross rod for rotating cooperation with the actuating mechanism is connected between the two transmission rods.

[0009] Preferably, an activity cavity is arranged in the fixed cylinder, a connecting column is connected to the moving block in sliding cooperation with the activity cavity, a spring is wound on the connecting column, and the two ends of the spring are respectively abutted on the moving block and the fixed cylinder.

[0010] Preferably, an activity groove is formed in the middle shaft for the activity of the connecting rod mechanism.

[0011] Preferably, the dialing mechanism comprises a dialing arm, left and right supports are connected to the dialing arm, the left support is rotationally arranged on a connecting rod mechanism, the right support is rotationally arranged on a middle shaft, the middle shaft is provided with a limiting opening communicated with the movable slot, the dialing arm is away from the limiting opening, the right support is rotationally connected, the left support is connected to the connecting rod mechanism.

[0012] The utility model discloses the beneficial effects are:

[0013] The application discloses a quick butt joint structure of a middle shaft of a photographic tripod, which is connected through a dialing arm and a connecting rod mechanism, realizes one-key locking and unlocking, and improves operation efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0014] The above and / or additional aspects and advantages of the utility model will become apparent and more readily appreciated from the following description of the embodiments, with reference to the following drawings, in which:

[0015] Figure 1 The utility model discloses a quick butt joint structure of a middle shaft of a photographic tripod Figure 1 ;

[0016] Figure 2 The utility model discloses a quick butt joint structure of a middle shaft of a photographic tripod Figure 2 ;

[0017] Figure 3 The utility model discloses a quick butt joint structure of a middle shaft of a photographic tripod Figure 3 ;

[0018] Figure 4 The utility model discloses a quick butt joint structure of a middle shaft of a photographic tripod Figure 4 ;

[0019] Figure 5 The utility model discloses a quick butt joint structure of a middle shaft of a photographic tripod. DETAILED DESCRIPTION

[0020] The embodiments of the utility model will be described in detail below, and the embodiment examples are shown in the drawings, wherein the same or similar signs represent the same or similar elements or elements with the same or similar functions throughout.

[0021] The orientation shown in the drawings can not be understood as limiting the specific protection scope of the utility model, and is only for the reference understanding of the preferred embodiment, and the position of the product components shown in the drawings can be changed or the number can be increased or the structure can be simplified.

[0022] The "connection" described in the specification and the "connection" of the components shown in the drawings can be understood as fixedly connected or detachably connected or integrally connected; it can be directly connected or connected through an intermediate medium, and those skilled in the art can understand the connection relationship according to the specific situation and can derive screw connection or riveting or soldering or clamping or embedding and the like in a suitable manner to replace different embodiments.

[0023] The orientation words such as up, down, left, right, top, bottom and the like described in the specification and shown in the drawings can be directly contacted or contacted through other features between the components; for example, above can be directly above and obliquely above, or it only means higher than others; other orientations can be similarly understood.

[0024] The manufacturing materials of the components with solid shapes represented in the specification and the drawings can adopt metal materials or non-metal materials or other synthetic materials; the machining processes adopted by the components with solid shapes can be stamping, forging, casting, wire cutting, laser cutting, injection molding, numerical milling, three-dimensional printing, machining and the like; those skilled in the art can adaptively select or combine selection according to different processing conditions, cost and precision, but not limited to the above materials and manufacturing processes.

[0025] A quick docking structure of a middle shaft of a photographic tripod, referring to Figures 1-5 , comprising a connecting rod mechanism 2 movably arranged on the middle shaft 1 and a locking sleeve 4 arranged on the connecting head 3, a driving mechanism 5 is connected to the connecting rod mechanism 2, an axial movable pressing structure 6 is arranged on the connecting rod mechanism 2, the driving mechanism 5 drives the pressing structure 6 to move axially through the connecting rod mechanism 2, so that the pressing structure 6 and the locking sleeve 4 form a locking or unlocking state.

[0026] Further, the pressing structure 6 comprises a fixed cylinder 61 arranged on the connecting rod mechanism 2, a movable table 62 is movably arranged on the outer periphery of the fixed cylinder 61, and a plurality of elastic balls 63 are uniformly distributed on the movable table 62 in the radial direction.

[0027] Further, a locking inclined surface 41 is arranged on the inner side wall of the locking sleeve 4, an installation cavity 621 is formed in the movable table 62, a moving block 6211 with a tapered guide surface 6212 is movably arranged in the installation cavity 621, and the tapered guide surface 6212 can push the elastic ball 63 against the locking inclined surface 41.

[0028] Further, the connecting rod mechanism 2 comprises a transmission rod 21 symmetrically arranged on the fixed cylinder 61, and a cross rod 22 for rotating cooperation with the driving mechanism 5 is connected between the two transmission rods 21.

[0029] Further, the fixed cylinder 61 is internally provided with a movable cavity 610, the moving block 6211 is connected with a connecting column 611 which is in sliding fit with the movable cavity 610, the connecting column 611 is provided with a spring 612, and the two ends of the spring 612 are respectively abutted on the moving block 6211 and the fixed cylinder 61.

[0030] Further, the middle shaft 1 is internally provided with a movable slot 7 for the connecting rod mechanism 2.

[0031] Further, the pushing mechanism 5 comprises a pushing arm 51, the pushing arm 51 is connected with a left support 52 and a right support 53, the left support 52 is rotationally arranged on the connecting rod mechanism 2, the right support 53 is rotationally arranged on the middle shaft 1, the middle shaft 1 is internally provided with a limiting opening 71 which is in communication with the movable slot 7, the pushing arm 51 is away from the limiting opening 71 and can drive the right support 53 to rotate, and the left support 52 drives the connecting rod mechanism 2 to move.

[0032] The working principle of the utility model is:

[0033] In the initial state, the pushing arm 51 is not pressed, the pushing arm 51 is away from the limiting opening 71, the spring 612 is in the natural elongation state, the ball 63 does not contact the locking sleeve 4, and the middle shaft 1 can be freely moved.

[0034] Locking process: press the arm 51, the arm 51 pushes the top pressure structure 6 to move axially through the connecting rod mechanism 2, and the top pressure structure 6 can be quickly connected with the locking sleeve 4; as an embodiment 1, the connecting rod mechanism 2 is taken as an example of the design concept of the application in combination with the transmission rod 21 and the fixed cylinder 61, and the top pressure structure 6 is taken as an example of the design concept of the application in combination with the spring 612, the movable table 62, the ball 63 and the moving block 6211. The movable table 62 is inserted into the locking sleeve 4, and when the arm 51 is pressed down, the transmission rod 21 is hingedly arranged on the arm 51, the fixed cylinder 61 is movably connected to the transmission rod 21, the fixed cylinder 61 is provided with an installation cavity 621, the moving block 6211 is movably arranged in the installation cavity 621, so that when the arm 51 is pressed down, the moving block 6211 is moved towards the locking sleeve 4 through the fixed cylinder 61, one side of the ball 63 is pushed against the locking slope 41 by the moving block 6211, and as the arm 51 continues to be pressed down, the arm 51 moves the moving block 6211 towards the locking sleeve 4 through the transmission rod 21, the moving block 6211 is provided with a tapered guide surface 6212, and as the moving block 6211 continues to move, the ball 63 is pushed against the locking slope 41 of the locking sleeve 4 under the pushing of the tapered guide surface 6212 (at this time, one side of the ball 63 is pushed against the locking slope 41, and the other side is locked on the tapered guide surface 6212), and the ball 63, the locking slope 41 and the tapered guide surface 6212 are combined to form a locking state, so as to ensure firm locking and prevent loosening. When the ball 63, the locking slope 41 and the tapered guide surface 6212 are combined to form the locking state, the arm 51 is limited in the limiting opening 71 at this time, so that the middle shaft 1 and the connecting head 3 can be kept in the state of being connected and locked. When in the locking state, the connecting column 611 movably arranged in the movable cavity 610 of the fixed cylinder 61 is arranged on the moving block 6211, the spring 612 is wound on the connecting column 611, and the two ends of the spring 612 are respectively abutted on the moving block 6211 and the fixed cylinder 61, so that the tapered guide surface 6212 of the moving block 6211 is kept abutted on the ball 63 by the spring 612.

[0035] Unlocking process: pull the arm 51 in the opposite direction, pull the transmission rod 21 to reset, drive the fixed cylinder 61 and the moving block 6211 to move towards the middle shaft 1, at this time, the tapered guide surface 6212 on the moving block 6211 is away from the ball 63, the ball 63 is unlocked, and when the middle shaft 1 is taken out, the ball 63 can be separated from the locking slope 41, so that the middle shaft 1 and the connecting head 3 can be easily unlocked.

[0036] On the basis of the above technical scheme, the structure cooperation of the dialing mechanism 5 can be selected as: the dialing arm 51 is connected with a left support 52 and a right support 53, the left support 52 is rotationally arranged on the connecting rod mechanism 2, the right support 53 is rotationally arranged on the middle shaft 1, the middle shaft 1 is provided with a limiting opening 71 communicated with the movable groove 7, the dialing arm 51 can drive the right support 53 to rotate when the dialing arm 51 is away from the limiting opening 71, and the connecting rod mechanism 2 is driven to move through the left support 52; when the middle shaft 1 and the connecting head 3 are to be connected and locked, the dialing arm 51 is dialed to drive the connecting rod mechanism 2 to move in the movable groove 7 (the right support 53 on the dialing arm 51 rotates around the middle shaft 1, and the left support 52 drives the connecting rod mechanism 2 to swing), and when the dialing arm 51 is limited on the limiting opening 71, the middle shaft 1 and the connecting head 3 are connected and locked at this time.

[0037] The quick docking structure of the middle shaft 1 of the photographic tripod of the application is driven by the dialing arm 51 and the connecting rod mechanism 2 to realize one-key locking and unlocking, and the operation efficiency is improved; in addition, the ball 63, the locking inclined surface 41 and the conical guide surface 6212 are cooperated to form a locking state, so that the locking is firm and loosening is prevented.

[0038] Although the utility model is described in detail with reference to the above embodiments, it is obvious to those skilled in the art through the disclosure that various changes or modifications can be made to the utility model without departing from the principles and spirit of the utility model defined in the claims, therefore, the detailed description of the embodiments of the disclosure is only used for explanation, not for limiting the utility model, and the protection range is defined by the content of the claims.

Claims

1. A quick-connect structure for the center column of a photographic tripod, characterized in that, It includes a linkage mechanism (2) movably mounted on a central shaft (1) and a locking sleeve (4) mounted on a connector (3). A toggle mechanism (5) is connected to the linkage mechanism (2). A pressing structure (6) that can move axially is provided on the linkage mechanism (2). The toggle mechanism (5) drives the pressing structure (6) to move axially through the linkage mechanism (2), so that the pressing structure (6) and the locking sleeve (4) are locked or unlocked.

2. The quick-connect structure for the center column of a photographic tripod according to claim 1, characterized in that, The top-pressing structure (6) includes a fixed cylinder (61) disposed on the linkage mechanism (2), and a movable platform (62) is movably disposed on the outer periphery of the fixed cylinder (61), and a plurality of balls (63) are radially evenly distributed on the movable platform (62).

3. The quick-connect structure for the center column of a photographic tripod according to claim 2, characterized in that, The inner wall of the locking sleeve (4) is provided with a locking ramp (41), and the movable platform (62) is provided with an installation cavity (621). A movable block (6211) with a tapered guide surface (6212) is movably arranged in the installation cavity (621). The tapered guide surface (6212) can push the ball (63) to press against the locking ramp (41).

4. The quick-connect structure for the center column of a photographic tripod according to claim 2, characterized in that, The linkage mechanism (2) includes transmission rods (21) symmetrically arranged on the fixed cylinder (61), and a crossbar (22) for the actuation mechanism (5) to rotate between the two transmission rods (21).

5. The quick-connect structure for the center column of a photographic tripod according to claim 3, characterized in that, The fixed cylinder (61) is provided with a movable cavity (610). The movable block (6211) is connected to a connecting post (611) that slides with the movable cavity (610). A spring (612) is wound around the connecting post (611), and the two ends of the spring (612) abut against the movable block (6211) and the fixed cylinder (61) respectively.

6. The quick-connect structure for the center column of a photographic tripod according to claim 1, characterized in that, The central shaft (1) has a movable groove (7) for the linkage mechanism (2) to move.

7. The quick-connect structure for the center column of a photographic tripod according to claim 6, characterized in that, The actuating mechanism (5) includes a lever arm (51), on which a left bracket (52) and a right bracket (53) are connected. The left bracket (52) is rotatably mounted on the linkage mechanism (2), and the right bracket (53) is rotatably mounted on the central shaft (1). The central shaft (1) has a limiting port (71) communicating with the movable groove (7). When the lever arm (51) leaves the limiting port (71), it can rotate the right bracket (53) in conjunction with the left bracket (52) and move in conjunction with the linkage mechanism (2).

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