A telescopic bracket that can be locked at any position

Abstract

This utility model relates to the field of photographic support technology, specifically providing a telescopic support that can be locked at any position, comprising: a sleeve with a first cavity having an opening at one end along the axial direction; the sleeve also having a first airflow channel and a second airflow channel, both of which are connected to the first cavity; a support rod slidably embedded in the first cavity and having a sealing structure with the inner wall of the first cavity; a first air valve, which is a one-way air valve, located in the first airflow channel, used to open when gas enters the first cavity from the outside and to close when gas is discharged from the first cavity to the outside; and a second air valve, located in the second airflow channel, used to close when gas is discharged from the first cavity to the outside. This utility model effectively solves the problem of cumbersome locking and unlocking operations for the telescopic length of existing single-rod telescopic photographic supports.

Description

Technical Field

[0001] This utility model relates to the field of photographic support frame technology, specifically providing a telescopic support frame that can be locked at any position. Background Technology

[0002] Existing telescopic single-pole photography brackets are composed of multiple nested sections of round tubes of different diameters, with locking buckles used to fix the telescopic length or height of the bracket between adjacent sections.

[0003] However, this type of telescopic single-pole photography bracket often requires two steps—loosening and tightening—to adjust and lock the height, which is rather cumbersome. Utility Model Content

[0004] This invention provides a telescopic bracket that can be locked at any position, solving the problem of cumbersome locking and unlocking operations for the telescopic length of existing single-pole telescopic brackets for photography.

[0005] This utility model provides a telescopic bracket that can be locked at any position, comprising:

[0006] A sleeve having a first cavity with one end open along the axial direction; the sleeve also having a first airflow channel and a second airflow channel, and both the first airflow channel and the second airflow channel are connected to the first cavity.

[0007] The support rod is slidably embedded in the first cavity and has a sealing structure between it and the inner wall of the first cavity;

[0008] The first air valve is a one-way air valve, located in the first airflow channel, and is used to open when gas enters the first cavity from the outside and close when gas is discharged from the first cavity to the outside.

[0009] The second gas valve is located in the second gas flow channel and is used to close when gas is discharged from the first cavity to the outside.

[0010] According to the telescopic bracket that can be locked at any position provided by this utility model, the first airflow channel includes a wide channel and a narrow channel, the first air valve is located in the wide channel, and can close and open the narrow channel.

[0011] According to the telescopic bracket that can be locked at any position provided by this utility model, the first air valve includes:

[0012] The first elastic element is coaxially disposed on the wide channel and is limited at one end. The first elastic element has a channel that allows gas to flow.

[0013] A sealing plug is disposed in the wide channel and fixed to the other end of the first elastic member. In its natural state, the sealing plug abuts against the narrow channel port.

[0014] According to the telescopic bracket that can be locked at any position provided by this utility model, the second airflow channel includes a second cavity and a connecting channel; one end of the second cavity is open, and the other end is connected to the connecting channel, and the connecting channel is connected to the first cavity;

[0015] The second air valve is installed in the second cavity.

[0016] According to the telescopic bracket that can be locked at any position provided by this utility model, the opening of the second cavity has a limiting structure;

[0017] The second air valve includes:

[0018] The second elastic element is disposed on the bottom surface of the second cavity;

[0019] The button has one end connected to the second elastic element and the other end protruding from the outer wall of the sleeve, and the button abuts against the limiting structure; there is a gap between the button and the inner wall of the second cavity;

[0020] A sealing element is disposed between the button and the limiting structure to close the airflow passage of the second airflow channel.

[0021] According to the telescopic bracket that can be locked at any position provided by this utility model, the sealing structure of the support rod includes a sealing ring, which is coaxially disposed at one end of the support rod near the top of the sleeve; and the sealing ring elastically abuts against the inner wall of the first cavity.

[0022] This utility model provides a telescopic bracket that can be locked at any position. It improves upon the traditional locking buckle type telescopic photographic bracket by replacing it with a telescopic bracket featuring pneumatic locking. This allows for locking at any position, and the sleeve's lifting position can be locked simply by controlling the opening and closing of the second air valve. Specifically:

[0023] By opening a first airflow channel and a second airflow channel on the sleeve, and setting a one-way flow first air valve in the first airflow channel and a second air valve in the second airflow channel, it is possible to realize that when the sleeve and the support rod slide away from each other, external gas can enter the first cavity through the first air valve and the second air valve, or it can enter the first cavity only through the first air valve.

[0024] When the sleeve and the support rod tend to slide closer together, the gas in the first cavity cannot be discharged from the first and second air valves, thus locking the sleeve and the support rod. When it is necessary to shorten the distance between them, simply control the second air valve to open.

[0025] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0027] Figure 1 This is a longitudinal partial sectional view of the telescopic bracket that can be locked at any position provided by this utility model in its initial state;

[0028] Figure 2 This is a schematic diagram of the longitudinal partial cross-sectional structure of the telescopic bracket provided by this utility model in the stretched state;

[0029] Figure 3 yes Figure 2 Enlarged structural diagram at point A;

[0030] Figure 4 yes Figure 3 Enlarged structural diagram at point B;

[0031] Figure 5 yes Figure 3 Enlarged schematic diagram of the structure at point C;

[0032] Figure 6 This is a partial cross-sectional view of the installation position of the sealing ring of the telescopic bracket provided by this utility model.

[0033] Figure label:

[0034] 1. Sleeve; 101. First cavity; 102. First airflow channel; 1021. Wide channel; 1022. Narrow channel; 103. Second airflow channel; 1031. Second cavity; 1032. Connecting channel; 2. Support rod; 3. Sealing structure; 301. Sealing ring; 4. First air valve; 401. First elastic element; 402. Sealing plug; 5. Second air valve; 501. Second elastic element; 502. Button; 503. Sealing element; 6. Limiting structure. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0036] In the description of the embodiments of this utility model, it should be noted that the terms "upper," "lower," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this utility model. In addition, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0037] In the description of the embodiments of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this utility model based on the specific circumstances.

[0038] In this embodiment of the utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0039] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0040] The following is combined with Figures 1 to 6 The embodiments shown illustrate the technical solution of this utility model:

[0041] This utility model embodiment provides a telescopic bracket that can be locked at any position, such as... Figure 1 and Figure 2 As shown, it includes: sleeve 1, first cavity 101, first airflow channel 102, second airflow channel 103, support rod 2, sealing structure 3, first air valve 4, and second air valve 5;

[0042] The sleeve 1 has a first cavity 101 with one end open along the axial direction. The sleeve 1 also has a first airflow channel 102 and a second airflow channel 103, and both the first airflow channel 102 and the second airflow channel 103 are connected to the first cavity 101. The support rod 2 is slidably embedded in the first cavity 101 and has a sealing structure 3 between it and the inner wall of the first cavity 101. The first air valve 4 is a one-way air valve, which is located in the first airflow channel 102 and is used to open when gas enters the first cavity 101 from the outside and close when gas is discharged from the first cavity 101 to the outside. The second air valve 5 is located in the second airflow channel 103 and is used to close when gas is discharged from the first cavity 101 to the outside.

[0043] In some embodiments, the second air valve 5 can also be a one-way valve. After the outside gas enters the first cavity 101 through the first air passage 102, the first air valve 4 enables the outside gas to enter the first cavity 101. When the position needs to be locked, the sleeve 1 is moved downward to allow the internal gas to be discharged outward through the first air passage 102. During the outward discharge process, the gas drives the first air valve 4 to move upward, causing the first air passage 102 to close. The gas cannot be discharged from the sleeve 1, thereby achieving the locking of the sleeve 1 and the support rod 2.

[0044] In this embodiment, the sleeve 1 has a first cavity 101 with one end open along the axial direction. A support rod 2 is slidably disposed in the first cavity 101. The sleeve 1 has a first airflow channel 102 and a second airflow channel 103, and both the first airflow channel 102 and the second airflow channel 103 are connected to the first cavity 101. In use, the support rod 2 is fixed to the ground, and photographic equipment is mounted on the sleeve 1. When the sleeve 1 is moved upward, external gas can enter the first cavity 101 through the first airflow channel 102 and the second airflow channel 103. After the sleeve 1 is moved to the target position, when it is necessary to lock the support rod 2 and the sleeve 1, the weight of the photographic equipment and the sleeve 1 itself causes the support rod 2 and the sleeve 1 to tend to slide closer together. The gas in the first cavity 101 will move towards the top of the sleeve 1. Under the flow of gas, the first air valve 4 is driven to abut against the first airflow channel 102, and then... The first airflow channel 102 is closed, and the second air valve 5 is always closed. Gas cannot be discharged from the first airflow channel 102 and the second airflow channel 103. At this time, the pressure difference between the inside and outside of the top of the sleeve 1 increases, making the sleeve 1 unable to move, thus locking the sleeve 1 and the support rod 2. When it is necessary to shorten or lengthen the distance between the sleeve 1 and the support rod 2, simply open the second air valve 5 manually to allow the gas to be discharged from the second airflow channel 103. The sleeve 1 and the support rod 2 can move relative to each other. After reaching a suitable distance, close the second air valve 5, and the gas cannot be discharged, thus locking the sleeve 1 and the support rod 2. The sealing structure 3 prevents the gas in the first cavity 101 from flowing out of the first cavity 101 through the gap between the sleeve 1 and the support rod 2, preventing the sleeve 1 from sliding suddenly due to the weight of the photographic equipment and the sleeve 1 itself during use after locking.

[0045] This utility model provides a telescopic bracket that can be locked at any position. It improves upon the traditional locking buckle type telescopic photographic bracket by replacing it with a telescopic bracket featuring pneumatic locking. This allows for locking at any position, and the sleeve 1 can be locked in its raised or lowered position simply by controlling the opening and closing of the second air valve 5. Specifically:

[0046] By opening a first airflow channel 102 and a second airflow channel 103 on the sleeve 1, and setting a one-way flow first air valve 4 in the first airflow channel 102 and a second air valve 5 in the second airflow channel 103, it is possible to realize that when the sleeve 1 and the support rod 2 slide away from each other, the outside gas can enter the first cavity 101 through the first air valve 4 and the second air valve 5, or it can enter the first cavity 101 only through the first air valve 4.

[0047] When the sleeve 1 and the support rod 2 tend to slide closer together, the gas in the first cavity 101 cannot be discharged from the first air valve 4 and the second air valve 5. In this way, the sleeve 1 and the support rod 2 are locked. When it is necessary to shorten the distance between them, it is only necessary to control the second air valve 5 to open.

[0048] The telescopic bracket provided according to the embodiments of this utility model, such as Figure 1 and Figure 4 As shown, the first airflow passage 102 includes a wide passage 1021 and a narrow passage 1022. The first air valve 4 is located in the wide passage 1021 and can close and open the narrow passage 1022.

[0049] In this embodiment, the first airflow channel 102 includes a wide channel 1021, a first air valve 4 is disposed in the wide channel 1021, one end of the narrow channel 1022 extends to the surface of the sleeve 1 to form an air inlet, and the other end is connected to the wide channel 1021. When the sleeve 1 is moved upward, external gas enters the wide channel 1021 from the narrow channel 1022 and acts on the surface of the first air valve 4, compressing the first air valve 4 downward, thereby realizing the flow of the first airflow channel 102. The other end of the wide channel 1021 is connected to the first cavity 101, so the gas entering from the narrow channel 1022 can flow from the wide channel 1021 to the first air cavity 101. The air flows into the cavity 101 and enters the first cavity 101. After the sleeve 1 is moved to the appropriate position, the weight of the sleeve 1 and the photographic equipment connected to the sleeve 1 causes the support rod 2 and the sleeve 1 to slide closer together. The gas in the first cavity 101 will flow upward into the wide channel 1021, causing the first air valve 4 in the wide channel 1021 to move upward and abut against the narrow channel 1022, sealing the narrow channel 1022. The gas cannot be discharged from the first air channel 102, resulting in a large pressure difference between the inside and outside of the top of the sleeve 1, making it impossible to move the sleeve 1, thereby locking the support rod 2 and the sleeve 1.

[0050] The telescopic bracket provided according to the embodiments of this utility model, such as Figure 1 and Figure 4 As shown, the first air valve 4 includes:

[0051] The first elastic element 401 is coaxially disposed on the wide channel 1021 and is limited at one end. The first elastic element 401 has a channel that allows gas to flow.

[0052] A sealing plug 402 is disposed on the wide channel 1021 and fixed to the other end of the first elastic member 401. In its natural state, the sealing plug 402 abuts against the port of the narrow channel 1022.

[0053] In some embodiments, the first elastic element 401 can be a metal spring, a rubber material, or a composite material, etc., so that when the sleeve 1 moves upward, the air can press down on the sealing plug 402, thereby easily compressing the first elastic element 401, so that the sealing plug 402 is away from the narrow channel 1022, and the first airflow channel 102 can be circulated, and external gas can enter the first cavity 101 through the first airflow channel 102.

[0054] In this embodiment, the first elastic element 401 is coaxially disposed on the wide channel 1021. One end is connected to the inner wall of the wide channel 1021 by bolts or pins, and the other end is fixedly connected to a sealing plug 402. In its natural state, the sealing plug 402 abuts against the port of the narrow channel 1022 through the first elastic element 401, so that the first airflow channel 102 is in a closed state. When the sleeve 1 is moved upward, the external air enters from the narrow channel 1022 and acts on the sealing plug 402, squeezing the sealing plug 402 and the first elastic element 401 downward, so that the first elastic element 401 drives the sealing plug 402 away from the narrow channel 1022. At the same time, the first elastic element 401 has a channel that allows gas to flow, so that the first airflow channel 102 is fully open and the gas can enter the first cavity 101 from the first airflow channel 102, providing a gas source in the first cavity 101 for the subsequent locking of the support rod 2 and the sleeve 1.

[0055] The telescopic bracket provided according to the embodiments of this utility model, such as Figure 1 and Figure 3 As shown, the second airflow channel 103 includes a second cavity 1031 and a connecting channel 1032; one end of the second cavity 1031 is open, and the other end is connected to the connecting channel 1032, and the connecting channel 1032 is connected to the first cavity 101.

[0056] The second air valve 5 is installed in the second cavity 1031.

[0057] In this embodiment, the second airflow channel 103 includes a second cavity 1031 and a connecting channel 1032. A second air valve 5 is installed in the second cavity 1031. One end of the second cavity 1031 is open, and the other end is connected to the connecting channel 1032. The connecting channel 1032 is connected to the first cavity 101. When the sleeve 1 is moved upward, the first airflow channel 102 and the second airflow channel 103 can be opened simultaneously, allowing external gas to enter the first cavity 101 through the first airflow channel 102 and the second airflow channel 103. When locking is required, the second air valve 5 is manually closed, and the second airflow channel 103 is in a closed state. The sleeve 1 and the camera installed on the sleeve 1... Due to its own weight, the camera equipment tends to slide closer to the support rod 2 and the sleeve 1. The gas in the first cavity 101 moves upward, causing the first elastic element 401 to move the sealing plug 402 upward. The sealing plug 402 then comes into contact with the narrow channel 1022, sealing the first airflow channel 102 and preventing the gas from flowing out. A pressure difference is generated inside and outside the top of the sleeve 1, preventing the sleeve 1 from moving and thus achieving a locking effect. When it is necessary to shorten or lengthen the distance between the support rod 2 and the sleeve 1, the second air valve 5 is opened, allowing the gas to flow out from the second cavity 1031, thus moving the sleeve 1. When locking is required, the second air valve 5 is closed again.

[0058] The telescopic bracket provided according to the embodiments of this utility model, such as Figure 1 and Figure 5 As shown, the opening of the second cavity 1031 has a limiting structure 6;

[0059] The second air valve 5 includes:

[0060] The second elastic element 501 is disposed on the bottom surface of the second cavity 1031;

[0061] Button 502 is connected at one end to the second elastic element 501, and the other end protrudes from the outer wall of sleeve 1, and button 502 abuts against limiting structure 6; there is a gap between button 502 and the inner wall of second cavity 1031.

[0062] A sealing element 503 is disposed between the button 502 and the limiting structure 6, and is used to close the airflow passage of the second airflow channel 103.

[0063] In some embodiments, the sealing element 503 can be a sealing ring or the like, capable of fitting the gap between the button 502 and the limiting structure 6, thereby closing the second airflow channel 103; the second elastic element 501 can be a metal spring, disc spring, or rubber, capable of applying an opposite force to the button 502; the limiting structure 6 can be an annular block or a rubber ring, capable of constraining the button 502 so that it does not detach from the sleeve 1 under the action of the second elastic element 501;

[0064] In this embodiment, a limiting structure 6 is provided at the opening of the second cavity 1031 to prevent the button 502 from detaching from the sleeve 1 under the reaction force of the second elastic element 501. One end of the button 502 abuts against the second elastic element 501, and the other end protrudes from the outer wall of the sleeve 1. By manually squeezing the button 502, it is compressed inward, thereby opening the second airflow channel 103, allowing external gas to enter the first cavity 101 through the second airflow channel 103. When the squeezing of the button 502 is released, the reaction force of the second elastic element 501 pushes the button 502 upward, causing the button 502 to move upward. 02 abuts against the limiting structure 6, thereby closing the second airflow channel 103 and preventing gas from escaping, thus achieving the locking effect; when it is necessary to shorten the distance between the sleeve 1 and the support rod 2, manually press down the button 502 to open the second airflow channel 103, thereby allowing the sleeve 1 to move. When the required distance is reached, release the pressure on the button 502, thus achieving the locking effect again; when the sealing element 503 makes the button 502 abut against the limiting structure 6, it fully closes the second airflow channel 103, preventing gas from escaping from the second airflow channel 103, ensuring a perfect locking effect.

[0065] The telescopic bracket provided according to the embodiments of this utility model, such as Figure 1 and Figure 6 As shown, the sealing structure 3 of the support rod 2 includes a sealing ring 301, which is coaxially disposed at one end of the support rod 2 near the top of the sleeve 1; and the sealing ring 301 elastically abuts against the inner wall of the first cavity 101.

[0066] In this utility model, the sealing structure 3 is preferably a sealing ring 301. The sealing ring 301 is coaxially arranged with the support rod 2 near the top end of the sleeve 1, and the sealing ring 301 elastically abuts against the inner wall of the first cavity 101 to ensure that when locked, the gas in the first cavity 101 cannot pass through the sleeve 1, and to ensure that the sleeve 1 and the photographic equipment installed on the sleeve 1 will not suddenly slide due to their own weight when locked.

[0067] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A telescopic support that can be locked at any position, characterized in that, include: A sleeve having a first cavity with one end open along the axial direction; the sleeve also having a first airflow channel and a second airflow channel, and both the first airflow channel and the second airflow channel are connected to the first cavity. The support rod is slidably embedded in the first cavity and has a sealing structure between it and the inner wall of the first cavity; The first air valve is a one-way air valve, located in the first airflow channel, and is used to open when gas enters the first cavity from the outside and close when gas is discharged from the first cavity to the outside. The second gas valve is located in the second gas flow channel and is used to close when gas is discharged from the first cavity to the outside.

2. The telescopic bracket according to claim 1, characterized in that: The first airflow channel includes a wide channel and a narrow channel. The first air valve is located in the wide channel and can close and open the narrow channel.

3. A telescopic prop according to claim 2, characterised in that The first air valve includes: The first elastic element is coaxially disposed on the wide channel and is limited at one end. The first elastic element has a channel that allows gas to flow. A sealing plug is disposed in the wide channel and fixed to the other end of the first elastic member. In its natural state, the sealing plug abuts against the narrow channel port.

4. The telescoping support of claim 1, wherein, The second airflow channel includes a second cavity and a connecting channel; one end of the second cavity is open, and the other end is connected to the connecting channel, which is connected to the first cavity; The second air valve is installed in the second cavity.

5. The telescopic bracket according to claim 4, characterized in that: The opening of the second cavity has a limiting structure; The second air valve includes: The second elastic element is disposed on the bottom surface of the second cavity; The button has one end connected to the second elastic element and the other end protruding from the outer wall of the sleeve, and the button abuts against the limiting structure; there is a gap between the button and the inner wall of the second cavity; A sealing element is disposed between the button and the limiting structure to close the airflow passage of the second airflow channel.

6. The telescoping support of claim 1, wherein, The sealing structure of the support rod includes a sealing ring, which is coaxially disposed at one end of the support rod near the top of the sleeve; and the sealing ring elastically abuts against the inner wall of the first cavity.

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