Foot tube for tripod

Abstract

The utility model relates to a foot tube for a tripod, which comprises at least one hollow outer tube and an inner tube capable of moving up and down in the outer tube, the lower end part of the outer tube is connected with a ball shaft sleeve assembly, the inner tube can move up and down in the ball shaft sleeve assembly, and the ball shaft sleeve assembly comprises a first screw joint sleeve and a shaft sleeve sleeved in the first screw joint sleeve. The outer peripheries of the first threaded connection sleeve and the second threaded connection sleeve are sleeved with sleeves for fixing the first threaded connection sleeve and the second threaded connection sleeve, a plurality of sliding grooves are formed in the shaft sleeve in the circumferential direction, a plurality of balls are arranged in the sliding grooves, one sides of the balls are attached to the outer side wall of the inner pipe, and the other sides of the balls are attached to the inner side wall of the sleeves. The foot tube is driven by the motor to replace a transmission rod, assembly is simplified, an operator can unlock the foot stand easily in a labor-saving mode, the ball shaft sleeve assembly is arranged between the outer tube and the inner tube, the smoothness when the foot tube slides down and the connection stability of the foot tube can be effectively improved, and the use convenience of a user is greatly improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of tripod, specifically to a tripod foot tube. BACKGROUND

[0002] The telescopic tripod is used for supporting photographic equipment such as camera, video camera, monitor, light supplement lamp and can adjust the height of them, improve the stability of photographic equipment in use, and the photographer can adjust the length of the foot tube to adjust the height of the tripod. The foot tube of the telescopic tripod currently comprises an outer tube and an inner tube, the inner tube is movably sleeved in the outer tube, the inner tube is fixedly connected with the outer tube through a locking mechanism, and no special structure for smoothly sliding of the inner tube is arranged between the outer tube and the inner tube in the prior art, but relies on the locking mechanism, but the existing locking mechanism is not reasonable in design, has high failure rate, and the smoothness of the foot tube will decrease after long time use, and the free falling becomes very slow. CONTENT OF THE UTILITY MODEL

[0003] In order to overcome the shortcomings and deficiencies in the prior art, the utility model aims at providing a tripod foot tube, which can effectively improve the falling smoothness of the foot tube and the connection stability of the foot tube by arranging a ball shaft sleeve assembly between the outer tube and the inner tube.

[0004] The utility model discloses a tripod foot tube, which comprises at least one hollow outer tube and an inner tube that can move up and down in the outer tube, the lower end of the outer tube is connected with a ball shaft sleeve assembly, the inner tube can move up and down in the ball shaft sleeve assembly, the ball shaft sleeve assembly comprises a first screw sleeve, a shaft sleeve sleeved in the first screw sleeve and a second screw sleeve arranged below the first screw sleeve, the outer periphery of the first screw sleeve and the second screw sleeve is sleeved with a sleeve that fixes the two, a plurality of sliding grooves are arranged in the circumferential direction of the shaft sleeve, a plurality of balls are arranged in the sliding grooves, one side of the ball is attached to the outer side wall of the inner tube, and the other side of the ball is attached to the inner side wall of the sleeve.

[0005] Further, the lower end of the outer tube is provided with external threads, and the inside of the first screw sleeve is provided with internal threads corresponding to the external threads.

[0006] Further, part of the sliding grooves penetrates the inner and outer walls of the shaft sleeve.

[0007] Further, the upper end of the inner tube is also provided with a locking mechanism, the locking mechanism comprises a fixed seat, a motor and a rotating shaft, the outer periphery of the rotating shaft is sleeved with a locking assembly, the motor is arranged at the upper end of the locking assembly and connected with the rotating shaft, the fixed seat is arranged at the lower end of the locking assembly, the lower end of the rotating shaft penetrates the fixed seat and is screwed with the fixed seat, and the rotating shaft can drive the locking assembly to move axially.

[0008] Further, the locking assembly comprises a movable sleeve and a locking seat, the locking seat is sleeved with the movable sleeve, the motor is installed at the upper end of the movable sleeve through a fixing plate, the fixed seat is arranged at the lower end of the locking seat, one end of the rotating shaft is connected with the power output end of the motor, and the other end of the rotating shaft penetrates the locking seat and the fixed seat in sequence and is screwed with the fixed seat.

[0009] Further, the locking assembly further comprises a locking groove arranged on the side wall of the movable sleeve and a locking piece arranged in the locking groove, and the locking seat is provided with an abutting inclined surface matched with the locking piece.

[0010] Further, the side wall of the movable sleeve is provided with at least two vertical grooves and / or vertical ribs.

[0011] Further, the inner wall of the outer tube and the inner wall of the inner tube are provided with matched vertical ribs and / or vertical grooves.

[0012] The beneficial effects of the utility model lie in that: the foot tube of the utility model adopts an electric locking mechanism, a motor drive is used instead of a transmission rod, assembly is simplified, and the operator also becomes relaxed and labor-saving when unlocking the foot support; the motor drives the rotating shaft to rotate and further drives the locking assembly to self-lock when locking, the motor reversely rotates to drive the rotating shaft to reversely rotate and further drive the locking assembly to unlock to control the inner tube to release relative to the outer tube, a ball bearing sleeve assembly is arranged between the outer tube and the inner tube, the smoothness and the foot tube connection stability when the foot tube slides can be effectively improved, and the user use convenience is greatly improved. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 is the perspective view of the utility model;

[0014] Figure 2 is the first exploded schematic view of the utility model;

[0015] Figure 3 is the second exploded schematic view of the utility model;

[0016] Figure 4 is the structural schematic view of the outer tube of the utility model;

[0017] Figure 5 is the structural schematic view of the ball bearing sleeve assembly of the utility model;

[0018] Figure 6 is the exploded schematic view of the ball bearing sleeve assembly of the utility model;

[0019] Figure 7 is the structural schematic view of the locking mechanism of the utility model;

[0020] Figure 8 is the exploded schematic view of the locking mechanism of the utility model;

[0021] Figure 9 is the sectional view of the locking mechanism of the utility model in the unlocked state;

[0022] Figure 10 is the sectional view of the locking mechanism of the utility model in the locked state.

[0023] The figure mark is: 1-outer tube, 11-vertical convex strip, 2-inner tube, 3-rolling ball shaft sleeve assembly, 31-first screw sleeve, 32-shaft sleeve, 321-slotted, 33-second screw sleeve, 34-sleeve, 35-rolling ball, 4-fixed seat, 5-motor, 6-rotary shaft, 7-locking assembly, 71-movable sleeve, 711-vertical recess, 72-locking seat, 721-abutment inclined surface, 73-locking slot, 74-locking piece, 8-fixed plate. DETAILED DESCRIPTION

[0024] In order to facilitate the understanding of those skilled in the art, the following will be combined with examples and drawings Figures 1-10 Further description of the utility model, the content mentioned in the embodiment is not limited to the utility model.

[0025] It should be noted that when an element is referred to as "fixed to" or "provided on" another element, it can be directly on another element or indirectly on the other element.

[0026] When an element is referred to as "connected to" another element, it can be directly connected to another element or indirectly connected to the other element.

[0027] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0028] In addition, the terms "first", "second" are only for description purpose, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include one or more of the features.

[0029] In the description of the present application, the meaning of "a plurality of" is two or more than two, unless otherwise explicitly specified.

[0030] See Figures 1-10 A tripod foot pipe comprises at least one hollow outer pipe 1 and an inner pipe 2 which can move up and down in the outer pipe 1, the lower end of the outer pipe 1 is connected with a ball bearing sleeve assembly 3, the inner pipe 2 can move up and down in the ball bearing sleeve assembly 3, the ball bearing sleeve assembly 3 comprises a first threaded sleeve 31, a sleeve 32 sleeved in the first threaded sleeve 31, and a second threaded sleeve 33 arranged below the first threaded sleeve 31, the outer periphery of the first threaded sleeve 31 and the second threaded sleeve 33 is sleeved with a sleeve 34 for fixing the two, the annular of the sleeve 32 is provided with a plurality of sliding grooves 321, a plurality of balls 35 are arranged in the sliding grooves 321, one side of the balls 35 abuts the outer side wall of the inner pipe 2, the other side of the balls 35 abuts the inner side wall of the sleeve 34 (when the inner pipe 2 slides down relative to the outer pipe 1, the balls 35 can be rolled in the sliding grooves 321). The lower end of the outer pipe 1 is provided with external threads, and the inside of the first threaded sleeve 31 is provided with internal threads corresponding to the external threads; part of the sliding grooves 321 penetrates the inner and outer walls of the sleeve 32, so that part of the balls 35 can be in contact with the outer side wall of the inner pipe 2 and the inner side wall of the sleeve 34 at the same time, which is beneficial to improve the smoothness when the inner pipe 2 slides down relative to the outer pipe 1.

[0031] The tripod foot pipe in the embodiment improves the smoothness when the inner pipe 2 slides down and the stability of the connection between the inner pipe 2 and the outer pipe 1 by arranging the ball bearing sleeve assembly 3 at the contact position of the inner pipe 2 and the outer pipe 1 when the inner pipe 2 moves axially relative to the outer pipe 1, which greatly improves the user's convenience.

[0032] In the embodiment, the upper end of the inner pipe 2 is also provided with a locking mechanism, the locking mechanism comprises a fixed seat 4, a motor 5 and a rotating shaft 6, the outer periphery of the rotating shaft 6 is sleeved with a locking assembly 7, the motor 5 is arranged at the upper end of the locking assembly 7 and connected with the rotating shaft 6, the fixed seat 4 is arranged at the lower end of the locking assembly 7, and the lower end of the rotating shaft 6 penetrates the fixed seat 4 and is screwed with the fixed seat 4, the rotating shaft 6 can drive the locking assembly 7 to move axially.

[0033] In the embodiment, the motor 5 is used for driving instead of the transmission rod, which simplifies the assembly, and the operator can easily and labor-savingly unlock the tripod, the unlocking efficiency of the foot pipe is also improved, and the tripod is easier to maintain; when in use, the motor 5 drives the rotating shaft 6 to rotate, so that the locking structure of the locking assembly 7 is self-locked or unlocked.

[0034] In the embodiment, the locking assembly 7 comprises a movable sleeve 71 and a locking seat 72, the locking seat 72 is sleeved on the movable sleeve 71, the motor 5 is installed on the upper end of the movable sleeve 71 through the fixing plate 8, the fixing seat 4 is arranged on the lower end of the locking seat 72, one end of the rotating shaft 6 is connected with the power output end of the motor 5, and the other end of the rotating shaft 6 penetrates the locking seat 72 and the fixing seat 4 in sequence and is screwed with the fixing seat.

[0035] In the embodiment, the locking assembly further comprises a locking groove 73 arranged on the side wall of the movable sleeve 71 and a locking piece 74 arranged in the locking groove 73, and the locking seat 72 is provided with an abutting inclined surface 721 which abuts against the locking piece 74.

[0036] In the embodiment, the foot pipe adopts an electric locking mechanism, the motor 5 is used for driving instead of a transmission rod, so that the assembly is simplified, and the operator can easily and labor-savingly unlock the foot support; when the motor 5 is locked, the motor 5 drives the rotating shaft 6 to rotate and then drives the locking assembly 7 to lock, and when the motor 5 is unlocked, the motor 5 drives the rotating shaft 6 to rotate and then drives the locking assembly 7 to unlock, so as to control the inner pipe 2 to release relative to the outer pipe 1, and through the arrangement of the ball bushing assembly 3 between the outer pipe 1 and the inner pipe 2, the smoothness when the foot pipe slides and the stability of the connection of the foot pipe can be effectively improved, and the user's convenience is greatly improved. Specifically, when in use, the motor 5 is started to drive the rotating shaft 6 to rotate and then drive the motor 5 and the movable sleeve 71 to move axially downward relative to the locking seat 72 (since the weight of the inner pipe 2 and the locking seat 72 as a whole is greater than the weight of the motor 5 and the movable sleeve 71 as a whole, the torque of the motor 5 is not enough to drive the inner pipe 2 and the locking seat 72 as a whole to move, and when the motor 5 is started, the motor 5 and the movable sleeve 71 mainly move relative to the locking seat 72), the locking piece 74 is driven to move downward along the abutting inclined surface 721 of the locking seat 72 until the locking piece 74 is abutted tightly, so that the locking piece 74 extends out of the locking groove 73 and abuts tightly against the inner wall of the upper sleeve, and the locking is realized (see Figure 10 ); when the motor 5 is reversely rotated, the movable sleeve 71 is driven to move upward, and the locking piece 74 is driven to move upward along the abutting inclined surface 721 of the locking seat 72 until the locking piece 74 is retracted into the locking groove 73, and the unlocking is realized (see Figure 9 ); the above structure can control the one-way release or locking of the foot pipe, the structure is reliable and stable, the operation is simple, and the user's convenience is greatly improved.

[0037] In the embodiment, the side wall of the movable sleeve 71 is provided with at least two vertical grooves 711 and / or vertical protrusions 11; the inner wall of the outer pipe 1 and the inner wall of the inner pipe 2 are provided with matching vertical protrusions 11 and / or vertical grooves 711.

[0038] The above embodiment is a preferred implementation scheme of the present application, in addition to this, the present application can be implemented in other ways, and any obvious replacement without departing from the concept of the present application is within the protection scope of the present application.

Claims

1. A tripod leg tube, characterized in that: The device includes at least one hollow outer tube and an inner tube that can move up and down within the outer tube. The lower end of the outer tube is connected to a ball bearing sleeve assembly. The inner tube can move up and down within the ball bearing sleeve assembly. The ball bearing sleeve assembly includes a first threaded sleeve, a bushing fitted inside the first threaded sleeve, and a second threaded sleeve located below the first threaded sleeve. A sleeve that fixes the first and second threaded sleeves is fitted around their outer peripheries. The bushing has several circumferential grooves, and several balls are arranged in the grooves. One side of each ball is attached to the outer side wall of the inner tube, and the other side of each ball is attached to the inner side wall of the sleeve.

2. The tripod leg tube according to claim 1, characterized in that: The lower end of the outer tube is provided with an external thread, and the inside of the first threaded sleeve is provided with an internal thread corresponding to the external thread.

3. The tripod leg tube according to claim 1, characterized in that: The groove extends through the inner and outer walls of the bushing.

4. A tripod leg tube according to claim 1, characterized in that: The upper end of the inner tube is also provided with a locking mechanism. The locking mechanism includes a fixed seat, a motor and a rotating shaft. A locking component is sleeved on the outer periphery of the rotating shaft. The motor is located at the upper end of the locking component and connected to the rotating shaft. The fixed seat is located at the lower end of the locking component, and the lower end of the rotating shaft passes through the fixed seat and is screwed to the fixed seat. The rotating shaft can drive the locking component to move axially.

5. A tripod leg tube according to claim 4, characterized in that: The locking assembly includes a movable sleeve and a locking seat. The movable sleeve is fitted around the outer periphery of the locking seat. The motor is mounted on the upper end of the movable sleeve via a fixing plate. The fixing seat is located at the lower end of the locking seat. One end of the rotating shaft is connected to the power output end of the motor. The other end of the rotating shaft passes through the locking seat and the fixing seat in sequence and is screwed to the fixing seat.

6. A tripod leg tube according to claim 5, characterized in that: The locking assembly further includes a locking groove on the side wall of the movable sleeve and a locking member placed in the locking groove. The locking seat is provided with an abutting inclined surface that cooperates with the locking member.

7. A tripod leg tube according to claim 5, characterized in that: The sidewalls of the movable sleeve are provided with at least two vertical grooves and / or vertical protrusions.

8. A tripod leg tube according to claim 1, characterized in that: The inner wall of the outer tube and the inner wall of the inner tube are both provided with matching vertical protrusions and / or vertical grooves.

Images