Camera stand extension structure

Abstract

The camera support extension structure is characterized in that: a pressurized chamber is provided below the platform of the support, an air pressure pump is provided on the top of the pressurized chamber, the chamber section of the pressurized chamber is trapezoidal and is larger at the top and smaller at the bottom; a connecting pipe is provided at the bottom of the pressurized chamber to connect to the inner side of the support leg; a bracket is provided on the inner side of the connecting pipe, a floating plug is placed in the bracket, the side of the floating plug facing the pressurized chamber is larger than the side of the floating plug facing the support leg, and the pipe wall of the connecting pipe on the side of the floating plug facing the pressurized chamber protrudes to form a through hole for the floating plug to plug. The present invention pressurizes the pressurized chamber through an air pressure pump, and the pressurized chamber inputs the gas into the inner side of the support leg through the connecting pipe along with the pressure, so as to realize the autonomous extension of the support leg, and under the action of the bracket and the floating plug, the gas in the support leg is rebounded to the floating plug under the cooperation of the gravity of the support downward pressure, so that the floating plug blocks the connecting pipe pipeline of the input support leg, so as to realize the fixed shaping after the support leg is extended.

Description

Technical Field

[0001] The invention relates to a telescopic structure, in particular to a camera bracket extension structure. Background Art

[0002] A camera stand is an important tool for stabilizing a camera. It is usually foldable or retractable and has three legs that are spread out and placed on the ground or an object. The camera is placed on the stand to keep it stable while shooting.

[0003] However, when the existing bracket is placed on the ground or on an object, the length and inclination of each leg need to be adjusted manually to achieve the stability required when the camera is framing. This is more troublesome because the change in the length of one leg will cause the change of another leg. To adjust one leg, the button must be turned off first to lock the leg, and then the other legs can be adjusted. The button always needs to be turned on and off, which is very troublesome. Summary of the invention

[0004] The purpose of the present invention is to solve the various troubles and overall structural deficiencies caused by the use and adjustment of the existing camera bracket, and to provide a self-expanding camera bracket.

[0005] The technical solution to the problem to be solved by the present invention is as follows:

[0006] The camera bracket extension structure is characterized in that: a pressurized chamber is provided under the platform of the bracket, an air pressure pump is provided on the top of the pressurized chamber, the chamber cross-section of the pressurized chamber is trapezoidal and is small at the top and large at the bottom; a connecting pipe is provided at the bottom of the pressurized chamber to connect to the inner side of the bracket leg; a guard frame is provided on the inner side of the connecting pipe, and a float plug is placed in the guard frame, the side of the float plug facing the pressurized chamber is smaller than the side of the float plug facing the bracket leg, and the tube wall of the connecting pipe on the side of the float plug facing the pressurized chamber protrudes to form a through hole for the float plug to plug.

[0007] The switch of the air pressure pump is arranged at the hinge of the support legs of the bracket, which is turned on when the support legs are spread out to the periphery and turned off when the support legs are closed to the center.

[0008] A pressure sensor is also provided on one side of the guardrail.

[0009] A deflation valve is arranged on one side of the connecting pipe close to the supporting leg.

[0010] The supporting leg is provided with an air release nozzle with a nut.

[0011] The beneficial effects of the present invention are as follows:

[0012] The present invention pressurizes the pressurizing chamber through an air pressure pump, and the pressurizing chamber inputs the gas into the inner side of the leg through the connecting pipe along with the pressure, so as to realize the autonomous extension of the leg. Under the action of the blocking frame and the floating plug, and in coordination with the downward pressure of the support, the gas in the leg rebounds to the floating plug, so that the floating plug blocks the connecting pipe pipeline of the input leg, so as to realize the fixation of the leg after extension. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the appearance of the present invention;

[0014] Figure 2 yes Figure 1 Schematic cross-sectional view of ;

[0015] Figure 3 It is a reference diagram of the use status of the present invention. DETAILED DESCRIPTION

[0016] The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0017] See also Figure 1 , Figure 2 , a camera bracket extension structure, a pressurized chamber 3 is provided under the platform 2 of the bracket 1, an air pressure pump 4 is provided on the top of the pressurized chamber 3, the chamber cross-section of the pressurized chamber 3 is trapezoidal and is small at the top and large at the bottom; a connecting pipe 5 is provided at the bottom of the pressurized chamber 3 to connect to the inner side of the bracket leg 6; a guard frame 7 is provided on the inner side of the connecting pipe 5, and a float plug 8 is placed in the guard frame 7, the side of the float plug 8 facing the pressurized chamber 3 is smaller than the side of the float plug 8 facing the bracket leg 6, and the tube wall of the connecting pipe 5 on the side of the float plug 8 facing the pressurized chamber 3 protrudes to form a through hole 9 for the float plug 8 to plug.

[0018] The frame 7 is cylindrical in shape as a whole, and most of the cylinder walls are removed from the top of the cylinder to form a hollow cylinder frame structure.

[0019] The switch of the air pressure pump is arranged on the outer wall of the battery placement tube 11 above the platform 2. When the battery placement tube above the platform 2 is held by hand, the switch can be activated by a finger.

[0020] The bracket 1 is also provided with an air-deflation structure, through which the bracket can be retracted and stored.

[0021] The implementation principle of the present invention is as follows:

[0022] Additional References Figure 3 , Figure 3 The camera is used in a scene with a stone A on the ground. In this scene, the lengths of the legs of the bracket are different, and some are long and some are short, so that the platform 2 can be kept stable on the stone A.

[0023] When in use, the user holds the platform 2 of the support 1 with hand B and starts the air pump 4, which increases the pressure in the pressurized chamber 3. The increased pressure enters the inner side of the supporting legs 6 corresponding to each connecting tube along the connecting tube 5. After the inner cavity of the supporting leg 6 is pressurized, it stretches outward against the inner supporting leg 12. In this process, the floating plug 8 in the connecting tube 5 is flushed to the bottom of the guard frame 7 by the airflow rushing in from the pressurized chamber 3, and the airflow flows around the floating plug 8.

[0024] When the extended inner legs 12 touch the ground or Figure 3 When the inner legs 12 are on the stone A shown in the figure, the reaction force on the inner cavity is formed, so that the airflow in the inner cavity is kept in a pressurized state. At this time, hand B may feel the reverse thrust because it wants to maintain the height. Figure 3 When the air pump 4 is turned off and hand B is released, the platform 2 drops a short distance and each inner leg retracts a short distance inward. The air pressure generated by the short retraction of each inner leg rushes into the connecting pipe 5 and impacts the float plug 8 from the large surface of the float plug 8, so that the float plug 8 moves toward the through hole 9, thereby blocking the through hole 9 and completing the shaping of the inner legs after extension.

[0025] Of course, because the air pressure in the pressurized chamber 3 is originally higher than that in the outside after the air pump 4 is turned off, the inner legs can be formed into a fixed shape when the float plug 8 does not hit the through hole 9. However, if an external force occurs to tilt the frame, the air pressure connected to the pressurized chamber through the connecting pipe will change the length of the other inner legs as the extension length of one of the inner legs changes. This change is a bit troublesome for a bracket that is not very heavy to adjust, because the air pump 4 will increase the pressure again, and the bracket will be unstable. If the weight above the bracket is large, the bracket can be restored to stability after being straightened after tilting.

[0026] Therefore, the above problem can be perfectly solved by making the chamber cross-section of the pressurizing chamber 3 trapezoidal and small at the top and large at the bottom. The small top and large bottom increase the pressure area below while reducing the pressure. That is to say, the pressure of the air flow returning after one of the inner legs encounters resistance during the pressurization process of the pressurizing chamber 3 will be much smaller than the air flow filled into the pressurizing chamber 3 through the connecting pipe 5. Therefore, as long as one of the inner legs first contacts the stone A, the bracket 1 is slightly lifted upward, and then the bracket is slightly pressed downward to return to the original height, the floating plug 8 in the connecting pipe 5 connected to the inner leg can be moved to the through hole 9 and blocked to cut off the incoming airflow.

[0027] Furthermore, as an improvement to the implementation method, the switch 10 of the air pressure pump 4 is arranged at the hinge of the support leg 6 of the bracket, and is turned on when the support leg 6 is spread out to the periphery, and is turned off when the support leg 6 is closed toward the center.

[0028] In the present invention, the switch 10 includes a top button 13, a spring 14 sleeved on the rear end of the top button 13, a contact piece 15 arranged behind the top button and capable of being contacted by compression of the spring 14, and a contact base 17 which is electrically powered and is contacted by the contact piece 15 through compression of a contact spring 16.

[0029] Furthermore, as an improvement to the implementation method, a pressure sensor is also provided on one side of the guardrail 7.

[0030] In the present invention, the pressure sensor needs to be directly or indirectly connected to the air pump through a circuit. When the pressure sensor senses a pressure change, which refers to the change caused by the air flow pressure reflux in the inner leg 12, the power supply of the air pump is disconnected, thereby realizing the automation of the air pump.

[0031] It should be noted here that there are multiple inner legs, so the power supply of the air pressure pump is disconnected only after the pressure sensor in each inner leg changes.

[0032] Furthermore, as an improvement to the implementation method, a deflation valve (not shown) is provided on one side of the connecting pipe 5 close to the supporting leg 6 .

[0033] In the present invention, when the legs of the bracket are used, they need to be retracted. However, because the float plug 8 blocks the through hole 9, the air pressure cannot be dissipated when the inner leg 12 retracts, and it is impossible to retract the inner leg 12. Therefore, it is necessary to open the air release valve (not marked in the figure) so that the air pressure can flow out from the air release valve (not marked in the figure) when the inner leg 12 retracts.

[0034] Furthermore, as an improvement to the implementation method, a vent nozzle 18 with a nut is provided on the support leg.

[0035] In the present invention, when the legs of the bracket need to be retracted after use, because the float plug 8 blocks the through hole 9, the air pressure cannot be dissipated when the inner leg 12 retracts, and it is impossible to retract the inner leg 12. Therefore, it is necessary to unscrew the nut so that the air pressure can flow out from the vent nozzle 18 when the inner leg 12 retracts.

Claims

1. A camera bracket extension structure, characterized in that: A pressurized chamber is provided below the platform of the bracket, and an air pressure pump is provided on the top of the pressurized chamber. The chamber cross-section of the pressurized chamber is trapezoidal and is smaller at the top and larger at the bottom, so that the pressure area below increases while the pressure becomes smaller. A connecting pipe is provided at the bottom of the pressurized chamber and connected to the inner side of the bracket leg. The airflow pressure returned by the pressurized chamber after one of the legs encounters resistance during the pressurization process will be smaller than the airflow filled into the pressurized chamber through the connecting pipe; a guard frame is provided on the inner side of the connecting pipe, and the guard frame is cylindrical as a whole, and its cylinder body removes most of the cylinder wall from the top to form a hollow cylinder frame structure, and a float plug is placed in the guard frame, and the side of the float plug facing the pressurized chamber is smaller than the side of the float plug facing the bracket leg, and the tube wall of the connecting pipe on the side of the float plug facing the pressurized chamber protrudes to form a through hole for the float plug to plug.

2. The camera bracket extension structure according to claim 1, characterized in that: The switch of the air pressure pump is arranged at the hinge of the support legs of the bracket, which is turned on when the support legs are spread out to the periphery and turned off when the support legs are closed to the center.

3. The camera support extension structure according to claim 1, characterized in that: A pressure sensor is also provided on one side of the guardrail.

4. The camera support extension structure according to claim 1, characterized in that: A deflation valve is arranged on one side of the connecting pipe close to the supporting leg.

5. The camera support extension structure according to claim 1, characterized in that: The supporting leg is provided with an air release nozzle with a nut.

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