Support foot and stand

Abstract

This utility model relates to the technical field of mobile terminal brackets, specifically disclosing a support foot and bracket. The support foot includes a first-stage arm, a second-stage arm, a first elastic element, and a positioning element. The second-stage arm is slidably inserted into the first-stage arm. The first elastic element abuts against the first-stage arm and the second-stage arm. The positioning element locks the second-stage arm relative to the first-stage arm when it is retracted. The first elastic element causes the second-stage arm to pop out when the positioning element releases the lock. Due to the first elastic element and the positioning element, when the second-stage arm is retracted relative to the first-stage arm, the positioning element locks the second-stage arm, preventing it from popping out and ensuring reliable storage of the second-stage arm relative to the first-stage arm. When the positioning element releases the lock, the first elastic element causes the second-stage arm to automatically pop out relative to the first-stage arm.

Description

Technical Field

[0001] This utility model relates to the technical field of mobile terminal brackets, and in particular to a support foot and bracket. Background Technology

[0002] With the widespread use of mobile devices, stands for phones and other mobile devices have become indispensable tools in people's daily lives. Traditional stands generally do not have adjustable support legs, and some products have a secondary arm. However, existing secondary arms usually require manual extension, meaning the stand needs to be fully extended in several steps: first, the stand needs to be opened, and then the secondary arm needs to be manually extended, resulting in low efficiency. Summary of the Invention

[0003] Therefore, the main purpose of this utility model is to provide a second-stage arm that can automatically pop out and stably store support feet and brackets.

[0004] To achieve the above objectives, this utility model provides a support foot, comprising:

[0005] First-level arm;

[0006] The second-stage arm is slidably inserted into the first-stage arm;

[0007] The first elastic member has one end abutting against the first stage arm and the other end abutting against the second stage arm;

[0008] A positioning element is disposed on the first stage arm. The positioning element is used to lock the second stage arm relative to the first stage arm when the second stage arm is retracted relative to the first stage arm. The positioning element is also used to release the lock between the second stage arm and the first stage arm. The first elastic element is used to drive the second stage arm to pop out relative to the first stage arm when the positioning element releases the lock between the second stage arm and the first stage arm.

[0009] Optionally, the first elastic member is disposed inside the first stage arm, and one end of the first elastic member abuts against the inner wall of the first stage arm, while the other end of the first elastic member abuts against the end of the second stage arm inserted into the first stage arm.

[0010] Optionally, the positioning member is rotatably disposed on the first stage arm, the positioning member has a positioning part located inside the first stage arm, and a holding mechanism is provided at one end of the second stage arm that is inserted into the first stage arm;

[0011] The positioning member can rotate relative to the first stage arm, causing the positioning part to rotate synchronously. This allows the positioning part to approach and engage the holding mechanism when the second stage arm retracts relative to the first stage arm, thereby locking the second stage arm relative to the first stage arm. Alternatively, the positioning part can move away from the first stage arm and release its engagement with the holding mechanism, thereby releasing the lock on the second stage arm relative to the first stage arm.

[0012] Optionally, the holding mechanism includes a holding member, the side wall of which is provided with a holding groove. The holding groove is adapted to the positioning part. The positioning part is used to approach and hold the holding groove when the second-stage arm is retracted relative to the first-stage arm, so as to achieve locking of the second-stage arm relative to the first-stage arm.

[0013] Optionally, a groove is formed on the side wall of the second-stage arm inserted into one end of the first-stage arm. The clamping mechanism further includes a second elastic member. A limiting post is provided on the side of the clamping member opposite to the clamping groove. The limiting post is located in the groove. The second elastic member is sleeved on the limiting post. One end of the second elastic member abuts against or connects to the side of the clamping member where the limiting post is provided. The other end of the second elastic member abuts against or connects to the groove wall of the groove.

[0014] Optionally, the first stage arm has two or more spaced-apart receiving cavities extending along its own axis, the number of the first elastic elements is the same as the number of the receiving cavities and corresponds one-to-one, and each first elastic element is disposed in its corresponding receiving cavity.

[0015] Optionally, the first stage arm includes a housing and a sleeve disposed on the housing, and two or more spaced-apart receiving cavities are formed in the sleeve.

[0016] Optionally, the second-stage arm includes a connecting locking member and a plug-in rod. The number of plug-in rods is the same as the number of receiving cavities and corresponds one-to-one. One end of each plug-in rod is slidably inserted into its corresponding receiving cavity and abuts against the corresponding first elastic member.

[0017] To achieve the above objectives, this utility model also provides a bracket, characterized in that it comprises:

[0018] main body;

[0019] The system includes several openable and retractable support legs. The first-stage arm of each support leg is rotatably connected to the main body. One end of a positioning member is rotatably connected to the first-stage arm, and the other end of the positioning member is rotatably connected to the main body or a locking mechanism. The locking mechanism is located at one end of the main body and is used to lock the second-stage arms of the support legs to keep the support legs in a retracted position. The locking mechanism is also used to unlock the second-stage arms to allow the support legs to automatically unfold to an open position. When the support legs unfold or retract, they can drive the positioning member to rotate relative to the first-stage arm.

[0020] Optionally, the locking mechanism has a protrusion at one end away from the main body, and the bracket further includes an anti-touch mechanism, which includes a base and a rotating member. The base is connected to the locking mechanism, and the rotating member is rotatably sleeved on the protrusion and / or the base.

[0021] The rotating member can rotate relative to the base to abut against the end of the second-stage arm away from the first elastic member, or to release the abutment against the second-stage arm.

[0022] Optionally, the rotating member includes a sleeve portion and a supporting portion connected to each other. The sleeve portion is rotatably sleeved on the protrusion and / or the base. The supporting portion is polygonal and has multiple angles. The number of angles of the supporting portion is the same as the number of the supporting feet. The rotating member can rotate relative to the base so that the multiple angles of the supporting portion abut against one end of the multiple second-stage arms away from the first elastic member, or cancel the abutment against the multiple second-stage arms.

[0023] Optionally, the engaging component has a first engaging portion, and the locking mechanism includes a mounting base, a third elastic element, and a sliding cover. The mounting base is disposed on the main body, and the sliding cover is slidably inserted into the mounting base. The third elastic element abuts between the mounting base and the sliding cover. The sliding cover is provided with a second engaging portion, the number of which is the same as the number of the support legs and corresponds one-to-one. The second engaging portion is used to engage and fix the second-stage arms of a plurality of the support legs so that the support legs are maintained in the retracted position. The second engaging portion is a hook formed by the outward extension of the side wall of the sliding cover.

[0024] Optionally, the main body includes a main rod and a sleeve assembly connected to each other. The first stage arm of each support foot is rotatably connected to the main rod. The sleeve assembly includes a fourth elastic element and a first sliding sleeve and a second sliding sleeve that are sleeved and connected. The first sliding sleeve is fixedly connected to the main rod, and the second sliding sleeve is fixedly connected to the locking mechanism. One end of the fourth elastic element is connected to the main rod, and the other end of the fourth elastic element is connected to the locking mechanism. The fourth elastic element is a tension spring.

[0025] The present invention has the following advantages: Since one end of the first elastic member abuts against the first-stage arm and the other end abuts against the second-stage arm, when the positioning member releases the lock between the second-stage arm and the first-stage arm, the second-stage arm can pop out relative to the first-stage arm under the elastic force of the first elastic member, eliminating the need for manual stretching of the second-stage arm, making operation convenient and quick. Furthermore, due to the positioning member, when the second-stage arm is retracted relative to the first-stage arm, the positioning member locks the second-stage arm relative to the first-stage arm, preventing it from popping out and ensuring reliable storage of the second-stage arm relative to the first-stage arm. Without the positioning member, the second-stage arm might always be in the popped-out state, potentially making it impossible to adjust the length of the support leg, and causing the support leg to occupy more space. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of 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 only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the devices shown in these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the support foot in one embodiment.

[0028] Figure 2 This is an exploded view of the support leg in one embodiment.

[0029] Figure 3 This is a schematic diagram of the structure after the support leg portion is hidden in one embodiment.

[0030] Figure 4 for Figure 3 Enlarged view of point A.

[0031] Figure 5 for Figure 3 Enlarged view of point B.

[0032] Figure 6 This is a schematic diagram of the structure of a card-holding mechanism according to one embodiment.

[0033] Figure 7 A schematic diagram showing the engagement of the positioning element when locking the second pole arm.

[0034] Figure 8 for Figure 7 Enlarged view of point C.

[0035] Figure 9 This is a structural schematic diagram of the support leg of one embodiment from another perspective.

[0036] Figure 10 for Figure 9 Enlarged view of point D.

[0037] Figure 11 This is a schematic diagram of the structure of a support according to one embodiment.

[0038] Figure 12 for Figure 11 Axonometric sectional view.

[0039] Figure 13 This is a schematic diagram of the structure of the support when it is deployed, according to one embodiment.

[0040] Figure 14 This is an exploded view of the locking mechanism and the anti-touch mechanism of one embodiment.

[0041] Among them, 1. bracket; 100. support foot; 110. first-stage arm; 111. housing; 112. socket; 1121. receiving cavity; 1122. clearance groove; 113. locking element; 114. baffle plate; 120. second-stage arm; 121. engaging element; 1211. first engaging part; 1212. through groove; 1213. second inclined part; 122. plug rod; 1221. groove; 130. first elastic element; 140. positioning element; 141. positioning part; 150. holding mechanism; 151. holding element; 1511. holding groove; 1512. limiting post; 152. second elastic element;

[0042] 200. Main body; 210. Main rod; 211. Mounting part; 212. Extension part; 2121. Hanging hole; 220. Sleeve assembly; 221. Fourth elastic element; 2211. Hanging part; 222. First sliding sleeve; 223. Second sliding sleeve;

[0043] 300. Locking mechanism; 310. Mounting base; 311. Connector; 320. Third elastic element; 330. Sliding cover; 331. Second engaging part; 332. Protrusion; 340. Fixing element;

[0044] 400 Anti-collision mechanism; 410 Base; 420 Rotating component; 421 Sleeve part; 422 Supporting part; 430 Reinforcing rib; 431 First inclined part.

[0045] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0046] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0047] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of this utility model are only used to explain the relative positional relationship and movement of the components in a specific posture (as shown in the attached figure). If the specific posture changes, the directional indication will also change accordingly. Furthermore, the descriptions involving "first," "second," etc., in this utility model are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, "and / or" throughout the text includes three solutions. Taking A and / or B as an example, it includes technical solution A, technical solution B, and a technical solution that simultaneously satisfies A and B. Furthermore, the technical solutions of various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0048] This utility model provides a support foot and bracket. The bracket can be used to support shooting devices such as cameras and video cameras, as well as electronic devices such as mobile phones and tablets. It can also be used to support any other suitable external equipment, devices, or mechanisms, such as gimbals and monitors.

[0049] Glossary: ​​"Pop-up / automatic pop-up" of the second-stage arm relative to the first-stage arm refers to the second-stage arm gradually extending a longer length relative to the first-stage arm; "retract / retract" of the second-stage arm relative to the first-stage arm refers to the second-stage arm gradually extending / inserting a longer length relative to the first-stage arm (i.e., the length of the second-stage arm extending relative to the first-stage arm gradually becomes shorter). Furthermore, when the second-stage arm moves relative to the first-stage arm, it will not completely extend out of the first-stage arm and detach from it.

[0050] The following will mainly describe the specific structure of the support feet.

[0051] like Figures 1 to 3As shown, a support foot 100 includes a first-stage arm 110, a second-stage arm 120, a first elastic member 130, and a positioning member 140. The second-stage arm 120 is slidably inserted into the first-stage arm 110. One end of the first elastic member 130 abuts against the first-stage arm 110, and the other end of the first elastic member 130 abuts against the second-stage arm 120. The positioning member 140 is disposed on the first-stage arm 110. The positioning member 140 is used to lock the second-stage arm 120 relative to the first-stage arm 110 when the second-stage arm 120 is retracted relative to the first-stage arm 110. The positioning member 140 is also used to release the lock of the second-stage arm 120 relative to the first-stage arm 110 when subjected to an external force. The first elastic member 130 is used to cause the second-stage arm 120 to pop out relative to the first-stage arm 110 when the positioning member 140 releases the lock of the second-stage arm 120 relative to the first-stage arm 110.

[0052] Because one end of the first elastic element 130 abuts against the first-stage arm 110 and the other end abuts against the second-stage arm 120, when the positioning element 140 releases the lock between the second-stage arm 120 and the first-stage arm 110, the second-stage arm 120 can pop out relative to the first-stage arm 110 under the elastic force of the first elastic element 130, eliminating the need for manual stretching of the second-stage arm 120, making operation convenient and quick. Furthermore, due to the positioning element 140, when the second-stage arm 120 is retracted relative to the first-stage arm 110, the positioning element 140 locks the second-stage arm 120 relative to the first-stage arm 110, preventing the second-stage arm 120 from popping out relative to the first-stage arm 110, thus ensuring reliable storage of the second-stage arm 120 relative to the first-stage arm 110. Without the positioning element 140, the second-stage arm 120 might always be in the popped-out state, potentially making it impossible to adjust the length of the support leg 100, and causing the support leg 100 to occupy more space.

[0053] In practical use, when the support foot 100 is applied to the bracket 1, it can be supported on the ground or other support areas by the second-stage arm 120. In other embodiments, it can also be supported on the ground or other support areas by the first-stage arm 110.

[0054] Specifically, the bracket 1 of a mobile terminal such as a mobile phone includes several support legs 100. When the bracket 1 is retracted, the several support legs 100 are in a closed state. At this time, the second-stage arm 120 is locked by the positioning member 140 to maintain the state of being retracted into the first-stage arm 110. When the bracket 1 is opened, the positioning member 140 is driven by force and cancels the locking of the second-stage arm 120 relative to the first-stage arm 110. Thus, the second-stage arm 120 can automatically pop out relative to the first-stage arm 110 under the elastic force of the first elastic member 130.

[0055] The first elastic element 130 can be selected as a metal or plastic spring, an elastic telescopic sleeve, etc. Specifically, in this embodiment, the first elastic element 130 is a compression spring. When the second-stage arm 120 retracts relative to the first-stage arm 110, the first elastic element 130 is in a compressed state. Thus, when the positioning member 140 unlocks the second-stage arm 120, the first elastic element 130 extends and resets, causing the second-stage arm 120 to pop out relative to the first-stage arm 110.

[0056] In this embodiment, the first elastic member 130 is disposed within the first stage arm 110, with one end of the first elastic member 130 abutting against the inner wall of the first stage arm 110, and the other end of the first elastic member 130 abutting against one end of the second stage arm 120 inserted into the first stage arm 110. This arrangement makes the first elastic member 130 more aesthetically pleasing as it is concealed by the first stage arm 110, and the first stage arm 110 can prevent significant deviation in the position of the first elastic member 130.

[0057] In other embodiments, the first elastic member 130, the first stage arm 110, and the second stage arm 120 can be configured in other ways, as long as the automatic pop-out of the second stage arm 120 relative to the first stage arm 110 can be achieved. For example, the end of the second stage arm 120 that is not inserted into the first stage arm 110 has a supporting portion 422. The second stage arm 120 is slidably inserted into the first stage arm 110 via the first end of the first stage arm 110. The first elastic member 130 is sleeved on the outer periphery of the second stage arm 120, and one end of the first elastic member 130 abuts against the first end of the first stage arm 110, while the other end of the first elastic member 130 abuts against the supporting portion 422 of the second stage arm 120. In this way, the automatic pop-out of the second stage arm 120 relative to the first stage arm 110 can also be achieved.

[0058] In some embodiments, the positioning member 140 can lock the second-stage arm 120 by various means such as clamping, abutting, holding, or threaded engagement, as long as the locking of the second-stage arm 120 relative to the first-stage arm 110 is achieved. For example, the positioning member 140 is a screw, which is threaded into the first-stage arm 110. Rotating the screw causes it to abut or extend into the second-stage arm 120, thereby achieving the locking of the second-stage arm 120 relative to the first-stage arm 110.

[0059] refer to Figures 1 to 4In this embodiment, the positioning member 140 is rotatably disposed on the first-stage arm 110. The positioning member 140 has a positioning part 141 located inside the first-stage arm 110. The end of the second-stage arm 120 inserted into the first-stage arm 110 is provided with a clamping mechanism 150. The positioning member 140 can rotate relative to the first-stage arm 110, driving the positioning part 141 to rotate synchronously. This allows the positioning part 141 to approach and clamp the clamping mechanism 150 when the second-stage arm 120 retracts relative to the first-stage arm 110, thereby locking the second-stage arm 120 relative to the first-stage arm 110, or moving the positioning part 141 away from and releasing the clamping mechanism 150, thereby releasing the lock on the second-stage arm 120 relative to the first-stage arm 110.

[0060] Specifically, when the second-stage arm 120 retracts relative to the first-stage arm 110, the positioning member 140 rotates relative to the first-stage arm 110, causing the positioning member 140 to engage with the holding mechanism 150, thereby locking the second-stage arm 120 relative to the first-stage arm 110 and ensuring reliable storage of the second-stage arm 120 relative to the first-stage arm 110. When it is necessary for the second-stage arm 120 to pop out relative to the first-stage arm 110, the positioning member 140 is driven to rotate, so that the positioning member 140 and the holding mechanism 150 are released from engagement, thereby releasing the lock of the second-stage arm 120 relative to the first-stage arm 110. The second-stage arm 120 can then pop out relative to the first-stage arm 110 without the user having to manually stretch the second-stage arm 120.

[0061] Further, refer to Figure 3 and Figure 4 A positioning element 140 includes two positioning portions 141 located on opposite sides of the positioning element 140. A second-stage arm 120 includes two holding mechanisms 150, each corresponding to one of the two positioning portions 141. This makes the holding of the positioning element 140 and the holding mechanisms 150 more stable and reliable, resulting in a more stable lock of the second-stage arm 120 relative to the first-stage arm 110.

[0062] refer to Figure 3 and Figures 5 to 8 The holding mechanism 150 includes a holding member 151. The side wall of the holding member 151 is provided with a holding groove 1511. The holding groove 1511 is adapted to the positioning part 141. The positioning part 141 is used to approach and hold the holding groove 1511 when the second-stage arm 120 is retracted relative to the first-stage arm 110, so as to achieve the locking of the second-stage arm 120 relative to the first-stage arm 110.

[0063] Specifically, when the second-stage arm 120 retracts relative to the first-stage arm 110, the positioning member 140 rotates relative to the first-stage arm 110. The positioning part 141 of the positioning member 140 gradually approaches and extends into the retaining groove 1511 of the retaining member 151, thereby locking the second-stage arm 120 relative to the first-stage arm 110. This prevents the second-stage arm 120 from popping out relative to the first-stage arm 110, ensuring reliable storage of the second-stage arm 120 relative to the first-stage arm 110. When the second-stage arm 120 needs to pop out relative to the first-stage arm 110, the driving positioning member 140 rotates in the opposite direction to the previous rotation, so that the positioning part 141 of the positioning member 140 exits and gradually moves away from the retaining groove 1511 of the retaining member 151, thereby releasing the retaining member 140 from the retaining member 151, thus releasing the locking of the second-stage arm 120 relative to the first-stage arm 110, and the second-stage arm 120 can pop out relative to the first-stage arm 110 without the user having to manually stretch the second-stage arm 120.

[0064] refer to Figures 5 to 8 The second-stage arm 120 is inserted into the side wall of one end of the first-stage arm 110, and a groove 1221 is formed therein. The holding mechanism 150 also includes a second elastic member 152. A limiting post 1512 is provided on the side of the holding member 151 opposite to the holding groove 1511. The limiting post 1512 is located in the groove 1221. The second elastic member 152 is sleeved on the limiting post 1512. One end of the second elastic member 152 abuts against or connects to the side of the holding member 151 where the limiting post 1512 is located, and the other end of the second elastic member 152 abuts against or connects to the groove wall of the groove 1221. The second elastic member 152 can be selected as a metal or plastic spring, an elastic telescopic sleeve, etc. Specifically, in this embodiment, the second elastic member 152 is a compression spring.

[0065] Specifically, when the second-stage arm 120 retracts relative to the first-stage arm 110, the positioning member 140 rotates relative to the first-stage arm 110. The positioning part 141 of the positioning member 140 gradually approaches and presses against the wall of the retaining groove 1511 of the retaining member 151, causing the wall of the retaining groove 1511 to deform against the elastic force of the second elastic member 152 until the positioning part 141 extends into the retaining groove 1511. Then, the second elastic member 152 drives the wall of the retaining groove 1511 to spring back or partially spring back, so that the retaining groove 1511 clamps the positioning part 141, thereby reliably clamping the positioning member 140 and the retaining member 151, thus achieving... The locking of the second-stage arm 120 relative to the first-stage arm 110 prevents the second-stage arm 120 from popping out relative to the first-stage arm 110, ensuring reliable storage of the second-stage arm 120 relative to the first-stage arm 110. When it is necessary for the second-stage arm 120 to pop out relative to the first-stage arm 110, the driving positioning member 140 rotates in the opposite direction to the previous rotation, causing the positioning part 141 of the positioning member 140 to press against the groove wall of the retaining groove 1511 and gradually withdraw from the retaining groove 1511 of the retaining member 151, thereby releasing the locking of the second-stage arm 120 relative to the first-stage arm 110. Furthermore, after the positioning part 141 withdraws from the retaining groove 1511, the groove wall of the retaining groove 1511 resets under the action of the second elastic member 152.

[0066] refer to Figure 2 The first-stage arm 110 has two or more spaced-apart receiving cavities 1121 extending along its own axis. The number of first elastic elements 130 is the same as the number of receiving cavities 1121 and corresponds one-to-one. Each first elastic element 130 is disposed within its corresponding receiving cavity 1121. Specifically, the arrangement of two or more first elastic elements 130 makes the movement of the second-stage arm 120 relative to the first-stage arm 110 along the receiving cavity 1121 more stable and reliable. By setting the first elastic elements 130 to the receiving cavities 1121 in a one-to-one correspondence, interference between different first elastic elements 130 is avoided, and the receiving cavity 1121 guides the extension and retraction of the first elastic elements 130. In this embodiment, there are two receiving cavities 1121 and two first elastic elements 130. It can be understood that in other embodiments, there may be three or more receiving cavities 1121 and two first elastic elements 130.

[0067] refer to Figures 1 to 2 The first-stage arm 110 includes a housing 111 and a socket 112 disposed on the housing 111. Two or more spaced-apart receiving cavities 1121 are formed in the socket 112. Specifically, the length of the housing 111 is greater than the length of the socket 112, so that when the second-stage arm 120 is retracted into the first-stage arm 110, the housing 111 can simultaneously cover the socket 112 and the portion of the second-stage arm 120 that protrudes from the socket 112, thus making it look more aesthetically pleasing.

[0068] Further, refer to Figures 1 to 2 The socket 112 is fixed to the housing 111 by a locking member 113, which may be, but is not limited to, a screw or bolt; furthermore, the first-stage arm 110 also includes a cover plate 114, which is disposed on the side of the socket 112 through which the locking member 113 passes, to cover the locking member 113, thereby making it look more aesthetically pleasing.

[0069] refer to Figures 1 to 2 The second-stage arm 120 includes a connecting locking member 121 and a connecting rod 122. The number of connecting rods 122 is the same as the number of receiving cavities 1121 and corresponds one-to-one. One end of each connecting rod 122 is slidably inserted into its corresponding receiving cavity 1121 and abuts against the corresponding first elastic member 130. Specifically, two or more connecting rods 122 are inserted into the receiving cavities 1121 corresponding to the sleeve 112, making the movement of the connecting rods 122 relative to the sleeve 112 more reliable and stable. The extension direction of the connecting rods 122 is the same as the extension direction of the receiving cavities 1121. Specifically, the connecting rods 122 are adapted to the receiving cavities 1121. The holding mechanism 150 is located on the side wall of the end of the connecting rod 122 inserted into the first-stage arm 110. In this embodiment, a groove 1221 is formed on the side wall of the end of the connecting rod 122 inserted into the receiving cavity 1121.

[0070] In this embodiment, there are two insertion rods 122. Specifically, each of the two insertion rods 122 has a groove 1221 on its opposite side. A second-stage arm 120 is equipped with two holding mechanisms 150, located on opposite sides of the two insertion rods 122. Positioning parts 141 are provided on opposite side walls of the positioning member 140. That is, the number of grooves 1221, holding mechanisms 150, and holding slots 1511 are the same and correspond one-to-one. When the second-stage arm 120 retracts into the first-stage arm 110 and the positioning member 140 locks the second-stage arm 120, the two positioning parts 141 of the positioning member 140 respectively engage with the holding slots 1511 of the two holding members 151, thereby achieving reliable locking of the second-stage arm 120 relative to the first-stage arm 110. It is understood that in other embodiments, the number of grooves 1221, holding mechanisms 150, and holding slots 1511 can be greater.

[0071] Further, refer to Figures 1 to 2 and Figures 11 to 12 The length of the housing 111 is greater than the combined length of the socket 112 and the locking member 121. Therefore, when the insertion rod 122 is inserted into the first-stage arm 110, the housing 111 can simultaneously cover and block both the socket 112 and the locking member 121, making the support leg 100 look more aesthetically pleasing. (See details...) Figure 5The bracket 1 has a second-stage arm 120 that retracts into the first-stage arm 110. At this time, only the housing 111 of the first-stage arm 110 can be seen from the outside, resulting in a beautiful and simple appearance.

[0072] In other embodiments, the support foot 100 may also include a third-level arm, and the cooperation relationship between the third-level arm and the second-level arm 120 is the same as the cooperation relationship between the second-level arm 120 and the first-level arm 110. It is understood that the support foot 100 may also include more levels of arms.

[0073] The following will mainly describe the specific structure of the stent 1.

[0074] like Figures 1 to 2 As shown in Figures 11 to 13, a bracket 1 includes several openable and retractable support legs 100, a main body 200, and a locking mechanism 300. The first-stage arm 110 of each support leg 100 is rotatably connected to the main body 200. One end of a positioning member 140 is rotatably connected to the first-stage arm 110, and the other end of the positioning member 140 is rotatably connected to either the main body 200 or the locking mechanism 300. The locking mechanism 300 is disposed at one end of the main body 200. The locking mechanism 300 is used to lock the second-stage arms 120 of the support legs 100 to maintain the support legs 100 in a retracted position. The locking mechanism 300 is also used to unlock the second-stage arms 120, allowing the support legs 100 to automatically unfold to an open position. When the support legs 100 unfold or retract, they can drive the positioning member 140 to rotate relative to the first-stage arm. Specifically, the positioning member 140 is columnar or rod-shaped; in this embodiment, the positioning member 140 is a connecting rod. In this embodiment, the other end of the positioning member 140 is rotatably connected to the locking mechanism 300.

[0075] When the bracket 1 needs to be opened to support the mobile terminal or other external devices, the locking mechanism 300 is operated to unlock the second-stage arm 120 of several support feet 100 relative to the main body 200, so that each support foot 100 unfolds. At this time, the positioning member 140 rotates relative to the first-stage arm 110 under the drive of the support feet 100, so that the positioning part 141 of the positioning member 140 and the locking mechanism 150 on the second-stage arm 120 are unlocked, so that the positioning member 140 is released from locking the second-stage arm 120. Then, the second-stage arm 120 pops out relative to the first-stage arm 110 under the elastic force of the first elastic member 130. No manual operation is required. Only the locking mechanism 300 needs to be operated to realize the full unfolding of the bracket 1, which is convenient and quick. When the bracket 1 needs to be retracted, the second-stage arms 120 of each support leg 100 are operated to retract the second-stage arms 120 into the corresponding first-stage arms 110. Then, each support leg 100 is closed until it surrounds the main body 200. During this process, the positioning member 140 rotates relative to the first-stage arm 110 in the opposite direction to the previous rotation, so that the positioning part 141 of the positioning member 140 gradually approaches and engages the engaging mechanism 150 on the second-stage arm 120. Thus, the positioning member 140 locks the second-stage arm 120 relative to the first-stage arm 110. Finally, the locking mechanism 300 is operated to lock the second-stage arms 120 of several support legs 100 relative to the main body 200. Thus, several support legs 100 are locked and cannot be unfolded, so that the positioning member 140 remains engaged with the second-stage arm 120.

[0076] Furthermore, it should be explained that in the support leg 100 scheme, "the positioning element 140 is also used to cancel the locking of the second-stage arm 120 relative to the first-stage arm 110 when subjected to external force" means that in the bracket 1 scheme, the locking mechanism 300 unlocks several second-stage arms 120 of the support legs 100 relative to the main body 200, so that the positioning element 140 will rotate during the unfolding of the support legs 100, thereby canceling the locking of the second-stage arm 120 relative to the first-stage arm 110.

[0077] In this embodiment, reference Figure 13The system has three support feet 100. Further, two of the three support feet 100 are at 120-degree angles to each other, thus reliably supporting the main body 200. When the three support feet 100 are retracted, they fit snugly against the main body 200, enveloping it. Further still, the support feet 100 are arc-shaped, allowing them to adhere to the surface of the main body 200 and envelop it. At this time, the second-stage arm 120 of the support feet 100 is locked by the locking mechanism 300. It is understood that in other embodiments, there can be four or more support feet 100. Specifically, the housing 111 of the first-stage arm 110 is arc-shaped, with the socket 112 of the first-stage arm 110 facing the main body 200. The housing 111 is located on the side of the socket 112 facing away from the main body 200. Three or more arc-shaped housings 111 can be arranged into a roughly cylindrical shape, making it more aesthetically pleasing and easier to grip.

[0078] refer to Figures 9 to 10 and Figures 12 to 14 The engaging member 121 has a first engaging portion 1211. The locking mechanism 300 includes a mounting base 310, a third elastic member 320, and a sliding cover 330. The mounting base 310 is disposed on the main body 200. The sliding cover 330 is slidably inserted into the mounting base 310. The third elastic member 320 abuts between the mounting base 310 and the sliding cover 330. The side wall of the sliding cover 330 is provided with a second engaging portion 331. The number of second engaging portions 331 is the same as the number of support legs 100 and corresponds one-to-one. The second engaging portions 331 are used to engage and fix the first engaging portion 1211 of the second-stage arm 120 so that the support legs 100 are maintained in the retracted position.

[0079] Specifically, when the bracket 1 needs to be opened, the sliding cover 330 is pressed relative to the mounting base 310 so that the sliding cover 330 overcomes the elastic force of the third elastic member 320. As a result, several second engaging parts 331 of the sliding cover 330 gradually disengage from the first engaging parts 1211 of the corresponding second-stage arm 120, thereby releasing the locking mechanism 300 from locking several second-stage arms 120. Then, several support feet 100 unfold. During this process, the positioning member 140 rotates relative to the first-stage arm 110 under the drive of the support feet 100. As a result, the positioning part 141 of the positioning member 140 and the holding mechanism 150 on the second-stage arm 120 are released from locking, so that the positioning member 140 releases the locking of the second-stage arm 120 relative to the first-stage arm 110. Then, the second-stage arm 120 pops out relative to the first-stage arm 110 under the elastic force of the first elastic member 130.

[0080] In this embodiment, the first engaging portion 1211 is a slot. Further, in actual use, the locking mechanism 300 of the bracket 1 is provided with a second engaging portion 331 that matches the slot. The second engaging portion 331 can be, but is not limited to, a protrusion, a hook, or other structure. In this embodiment, the second engaging portion 331 is a hook. It is understood that in other embodiments, the first engaging portion 1211 can be a protrusion, a hook, or other structure, and the second engaging portion 331 of the locking mechanism 300 can be a slot that matches the protrusion.

[0081] refer to Figure 10 The side wall of the engaging member 121 is provided with a through groove 1212, and the first engaging part 1211 is disposed on the groove wall of the through groove 1212. Furthermore, in actual use, the second engaging part 331 of the locking mechanism 300 of the bracket 1 extends into the through groove 1212 and engages with the first engaging part 1211.

[0082] refer to Figures 12 to 14 The mounting base 310 has a connector 311, which passes through the sliding cover 330 and is disposed on the mounting base 310. The third elastic member 320 is sleeved on the connector 311 and abuts against the mounting base 310 and the sliding cover 330 respectively. Specifically, the connector 311 guides the extension and retraction of the third elastic member 320.

[0083] Furthermore, the locking mechanism 300 also includes a fixing member 340, which may be, but is not limited to, a screw. The screw passes through the sliding cover 330 and connects to the connector 311. The screw nut limits the sliding cover 330, preventing it from detaching from the mounting base 310. The sliding cover 330 is similar to a button, and is movably mounted on the mounting base 310. In this embodiment, the connector 311 is a connecting post; in other embodiments, the connector 311 may also have other shapes.

[0084] In one embodiment, under normal conditions, the sliding cover 330 protrudes from the mounting base 310, making it easy to press the sliding cover 330 when the bracket 1 needs to be opened. Additionally, the main body 200 can be held, and the bracket 1 can be placed directly on the ground or other supporting platform. Under the weight of the bracket 1 and / or the impact force when placed on the ground, the sliding cover 330 retracts into the mounting base 310 against the elastic force of the third elastic member 320. This causes the second engaging portion 331 to gradually move away from and exit from the first engaging portion 1211 of the second-stage arm 120, thereby releasing the locking mechanism 300 relative to the second-stage arm 120. Then, the support leg 100 automatically unfolds, and the second-stage arm 120 automatically pops out relative to the first-stage arm 110. Specifically, with this configuration, the bracket 1 of this invention can automatically and fully unfold when placed on the ground or other supporting platform, making it convenient and quick to use.

[0085] In other embodiments, when the support foot 100 includes a third or more stages, the locking mechanism 300 is used to lock the last stage.

[0086] refer to Figures 1 to 2 and Figure 7 The first-stage arm 110 has a clearance groove 1122 along its own axis, and the positioning member 140 extends into the clearance groove 1122 and is hinged to the first-stage arm 110. Specifically, this arrangement allows the positioning member 140 to be accommodated in the clearance groove 1122 when the bracket 1 is retracted and the several support legs 100 are closed.

[0087] refer to Figures 12 to 14 The locking mechanism 300 has a protrusion 332 at the end away from the main body 200. The bracket 1 also includes an anti-collision mechanism 400, which includes a base 410 and a rotating member 420. The base 410 is connected to the locking mechanism 300, and the rotating member 420 is rotatably sleeved on the protrusion 332 and / or the base 410. The rotating member 420 can rotate relative to the base 410 to abut against the end of the second-stage arm 120 away from the first elastic member 130, or to release the abutment against the second-stage arm 120. Specifically, the protrusion 332 is located at the end of the sliding cover 330 away from the main body 200. In this embodiment, the rotating member 420 is rotatably sleeved on the protrusion 332 and the base 410, and abuts against the sliding cover 330 and the base 410.

[0088] Specifically, when the support legs 100 are closed and the locking mechanism 300 locks the second-stage arms 120 of several support legs 100 relative to the main body 200, the rotating member 420 is rotated relative to the base 410 so that the rotating member 420 abuts against the end of the second-stage arm 120 away from the first elastic member 130. This prevents the rotating member 420, the base 410, and the sliding cover 330 from moving relative to the second-stage arm 120 in the direction closer to the main body 200. In other words, the sliding cover 330 is not pressed against the mounting base 310, thus preventing the locking mechanism 300 from releasing its lock on the several second-stage arms 120. This avoids accidental release of the locking mechanism 300. For example, when the bracket 1 is stored in a bag, backpack, or other storage space, the bracket 1 automatically pops open to prevent the sliding cover 330 from being bumped by other people or objects. When the bracket 1 needs to be used, the rotating member 420 is rotated relative to the base 410 so that the rotating member 420 is released from the second-stage arm 120. When the sliding cover 330 is pressed against the mounting base 310, or one side of the mounting base 310 of the bracket 1 is placed on the ground or other support area, the sliding cover 330 overcomes the elastic force of the third elastic member 320 after being subjected to force. As a result, several second engaging parts 331 of the sliding cover 330 gradually disengage from the first engaging parts 1211 of the corresponding second-stage arm 120, thereby releasing the locking mechanism 300 from locking several second-stage arms 120 relative to the main body 200. Then, several support feet 100 unfold. During this process, the positioning member 140 rotates relative to the first-stage arm 110 under the drive of the support feet 100. As a result, the positioning part 141 of the positioning member 140 and the holding mechanism 150 on the second-stage arm 120 are released from the holding mechanism 150, so that the positioning member 140 releases the locking of the second-stage arm 120 relative to the first-stage arm 110. Then, the second-stage arm 120 pops out relative to the first-stage arm 110 under the elastic force of the first elastic member 130.

[0089] refer to Figures 12 to 14 The rotating member 420 includes a sleeve portion 421 and a supporting portion 422 connected to each other. The sleeve portion 421 is rotatably sleeved on the protrusion 332 and / or the base 410. The supporting portion 422 is polygonal and has multiple corners. The number of corners of the supporting portion 422 is the same as the number of support feet 100. The rotating member 420 can rotate relative to the base 410 so that the multiple corners of the supporting portion 422 abut against one end of the multiple second-stage arms 120 away from the first elastic member 130, or cancel the abutment against the multiple second-stage arms 120. In this embodiment, there are three support feet 100 and three corners of the supporting portion 422. The rotating member 420 is rotatably sleeved on the protrusion 332 and the base 410. The sleeve portion 421 abuts against the sliding cover 330, and the supporting portion 422 abuts against the base 410.

[0090] Further, refer to Figure 14The rotating component 420 also includes a reinforcing rib 430, which is connected between the sleeve portion 421 and the abutment portion 422. There are multiple reinforcing ribs 430, which are evenly arranged between the sleeve portion 421 and the abutment portion 422. In this embodiment, there are three reinforcing ribs 430. In other embodiments, the number of reinforcing ribs 430 may be more or less.

[0091] Furthermore, refer to Figures 12 to 14 The reinforcing rib 430 has a first inclined portion 431, and the end of the second-stage arm 120 opposite to the first elastic member 130 has a second inclined portion 1213 adapted to the first inclined portion 431. Thus, when the rotating member 420 is rotated relative to the base 410 so that it abuts against the end of the second-stage arm 120 opposite to the first elastic member 130, the first inclined portion 431 of the reinforcing rib 430 abuts against the second inclined portion 1213 of the second-stage arm 120, thereby making the abutment between the rotating member 420 and the second-stage arm 120 more adapted and stable. Specifically, the second inclined portion 1213 is located on the engaging member 121, specifically at the end of the engaging member 121 away from the insertion rod 122.

[0092] Furthermore, the base 410 is fixedly connected to the sliding cover 330, specifically through screws or other structures.

[0093] In this embodiment, an anti-touch mechanism 400 is provided. When the bracket 1 is retracted, the anti-touch mechanism 400 protrudes or partially protrudes from the second pole arm, that is, the anti-touch mechanism 400 is exposed. Therefore, when it is necessary to open the bracket 1, it is easy to press the anti-touch mechanism 400. In addition, the main body 200 can be held and the bracket 1 can be placed directly on the ground or other support platform. Under the weight of the bracket 1 and / or the impact force when it is placed on the ground, the anti-touch mechanism 400 is subjected to force and transmits the force to the sliding cover 330. The sliding cover 330 overcomes the elastic force of the third elastic member 320 and retracts into the mounting base 310. As a result, the second engaging part 331 gradually moves away from the first engaging part 1211 of the second pole arm 120 and exits from the first engaging part 1211, thereby releasing the locking mechanism 300 relative to the second pole arm 120. Then, the support foot 100 automatically unfolds and the second pole arm 120 automatically pops out relative to the first pole arm 110. Specifically, with this configuration, the bracket 1 of this utility model can automatically and fully unfold when placed on the ground or other supporting platform, making it convenient and quick to use. Furthermore, in the embodiment with the anti-touch mechanism 400, the sliding cover 330 can partially protrude from the second pole arm or remain completely concealed.

[0094] refer to Figure 6 The main body 200 includes a main rod 210 and a sleeve assembly 220 connected to each other. The first stage arm 110 of each support foot 100 is rotatably connected to the main rod 210. The locking mechanism 300 is disposed at the end of the sleeve assembly 220 away from the main rod 210.

[0095] refer to Figure 11 and Figure 12 The sleeve assembly 220 includes a fourth elastic element 221 and a first sliding sleeve 222 and a second sliding sleeve 223 that are sleeved and connected together. The first sliding sleeve 222 is fixedly connected to the main rod 210, and the second sliding sleeve 223 is fixedly connected to the locking mechanism 300. One end of the fourth elastic element 221 is connected to the main rod 210, and the other end of the fourth elastic element 221 is connected to the locking mechanism 300. In this embodiment, the fourth elastic element 221 can be selected as a metal or plastic spring, an elastic telescopic sleeve, etc. Preferably, the fourth elastic element 221 is a tension spring. In this embodiment, the first sliding sleeve 222 is an inner tube, the second sliding sleeve 223 is an outer tube, and the fourth elastic element 221 is located inside the first sliding sleeve 222 and the second sliding sleeve 223. In other embodiments, the first sliding sleeve 222 can also be an outer tube, and the second sliding sleeve 223 can be an inner tube. The second sliding sleeve 223 is fixedly connected to the mounting base 310 of the locking mechanism 300.

[0096] Specifically, when the bracket 1 needs to be opened, the locking mechanism 300 unlocks several second-stage arms 120 relative to the main body 200. Under the retraction force of the fourth elastic element 221, the second sliding sleeve 223 moves closer to the main rod 210 through the locking mechanism 300, thereby causing the support foot 100 to rotate and open, and then causing the positioning element 140 to rotate, so that the second-stage arms 120 pop out relative to the first-stage arm 110. When the bracket 1 needs to be retracted, the second-stage arms 120 are retracted into the first-stage arm 110 and pulled relative to the first sliding sleeve 222. The second sliding sleeve 223 overcomes the elastic force of the fourth elastic element 221 and gradually moves away from the main rod 210. Then, it drives the positioning element 140 to rotate in the opposite direction to the previous one, thereby driving the support feet 100 to rotate and close. When the three support feet 100 are closed, they fit against the sleeve assembly 220 and wrap around the sleeve assembly 220. At this time, the locking mechanism 300 locks the second-stage arm 120 of several support feet 100 relative to the main body 200, and the positioning element 140 also locks the second-stage arm 120 relative to the first-stage arm 110.

[0097] In this embodiment, the sidewalls of the first sliding sleeve 222 and the second sliding sleeve 223 are respectively provided with through holes, and the sidewalls of the main rod 210 and the locking mechanism 300 are respectively provided with protrusions adapted to the through holes. The first sliding sleeve 222 and the main rod 210 are fixedly connected to the protrusions through the through holes, and the second sliding sleeve 223 and the locking mechanism 300 are fixedly connected to the protrusions through the through holes. It can be understood that the first sliding sleeve 222 and the main rod 210, and the second sliding sleeve 223 and the locking mechanism 300 can also be fixedly connected by other applicable methods.

[0098] refer to Figure 12The fourth elastic member 221 has hanging portions 2211 at both ends. The main rod 210 and the locking mechanism 300 are respectively provided with hanging holes 2121. The two hanging portions 2211 of the fourth elastic member 221 are respectively hung in the hanging holes 2121 of the main rod 210 and the locking mechanism 300. In this embodiment, the hanging portion 2211 is hook-shaped. It is understood that other methods can be used to connect the fourth elastic member 221 with the main rod 210 and the locking mechanism 300 as needed. The hanging hole 2121 is opened in the mounting base 310, and one of the hanging portions 2211 of the fourth elastic member 221 is hung in the hanging hole 2121 of the mounting base 310. One end of the positioning member 140 is hinged to the mounting base 310 of the locking mechanism 300. In other embodiments, one end of the positioning member 140 can also be hinged to the sliding cover 330 of the locking mechanism 300. Furthermore, the end of the connector 311 away from the sliding cover 330 passes through the mounting base 310, and the mounting hole 2121 is opened at the end of the connector 311 away from the sliding cover 330.

[0099] refer to Figure 13 The main rod 210 is generally cylindrical and includes a mounting portion 211 and an extension portion 212. The extension portion 212 is located at the end of the mounting portion 211 opposite to the sleeve assembly 220. In this embodiment, one end of the extension portion 212 passes through the mounting portion 211 and extends into the first sliding sleeve 222. The mounting hole 2121 of the main rod 210 is formed at the end of the extension portion 212 that extends into the first sliding sleeve 222. The extension portion 212 is a protruding post with external threads for screwing into a threaded hole on an external device or apparatus. It is understood that the extension portion 212 can also be of other shapes; for example, the extension portion 212 can be a threaded hole for screwing into a stud on an external device or apparatus. In addition, the extension portion 212 can also be a clamping assembly.

[0100] The operation process of the aforementioned support 1 is roughly as follows:

[0101] When the bracket 1 needs to be opened, press the anti-touch mechanism 400 or place one end of the bracket 1 with the anti-touch mechanism 400 on the ground or other support platform. The anti-touch mechanism 400 is subjected to force and transmits the force to the sliding cover 330, causing the sliding cover 330 to overcome the elastic force of the third elastic element 320 and move towards the main rod 210. As a result, the second engaging part 331 of the sliding cover 330 gradually moves away from the first engaging part 1211 of the second-stage arm 120 and exits from the first engaging part 1211, thereby releasing the locking mechanism 300 from locking the second-stage arm 120 relative to the main body 200. After the second-stage arm 120 is released from the locking mechanism, the fourth elastic element 221 of the sleeve assembly 220 automatically... The retraction reset is achieved by driving the second sliding sleeve 223 to move relative to the first sliding sleeve 222 closer to the main rod 210 via the mounting base 310 connected to the fourth elastic element 221. At the same time, it drives the positioning element 140, which is rotatably connected to the mounting base 310, to rotate. This, in turn, drives the support foot 100, which is rotatably connected to the positioning element 140, to rotate and open. During the rotation and opening of the support foot 100, the two positioning parts 141 of the positioning element 140 exit and gradually move away from the retaining groove 1511 of the retaining element 151. As a result, the positioning element 140 and the retaining element 151 are released from their retaining position, thereby releasing the locking of the second-stage arm 120 relative to the first-stage arm 110. The second-stage arm 120 can then pop out relative to the first-stage arm 110.

[0102] When the bracket 1 needs to be retracted, the second-stage arms 120 of each support leg 100 are operated to retract the second-stage arms 120 into the corresponding first-stage arms 110. Then, the second sliding sleeve 223 is pulled relative to the first sliding sleeve 222, so that the second sliding sleeve 223 overcomes the elastic force of the fourth elastic element 221 and gradually moves away from the main rod 210. Then, the positioning element 140 is driven to rotate in the opposite direction, thereby driving the support legs 100 to rotate and close. The through groove 1212 of the second-stage arm 120 presses the second engaging part 331 of the sliding cover 330, so that the sliding cover 330 overcomes the elastic force of the third elastic element 320 and is pressed until the first engaging part 1212 is closed. 11 engages and is fixed with the second engaging part 331. Then, the sliding cover 330 is reset under the elastic force of the third elastic member 320. At this time, the locking mechanism 300 engages with the second-stage arm 120 of several support feet 100. During the rotation and closing of the support feet 100, the positioning part 141 of the positioning member 140 gradually approaches and extends into the holding groove 1511 of the holding member 151, so that the positioning member 140 and the holding member 151 are engaged, thereby realizing the locking of the second-stage arm 120 relative to the first-stage arm 110, so that the second-stage arm 120 cannot pop out relative to the first-stage arm 110, ensuring the reliable storage of the second-stage arm 120 relative to the first-stage arm 110.

[0103] The above are merely preferred embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent device transformations made based on the contents of this utility model specification and drawings under the utility model concept, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this utility model.

Claims

1. A support leg, characterized in that, include: First-level arm; The second-stage arm is slidably inserted into the first-stage arm; The first elastic member has one end abutting against the first stage arm and the other end abutting against the second stage arm; A positioning element is disposed on the first stage arm. The positioning element is used to lock the second stage arm relative to the first stage arm when the second stage arm is retracted relative to the first stage arm. The positioning element is also used to release the lock between the second stage arm and the first stage arm. The first elastic element is used to drive the second stage arm to pop out relative to the first stage arm when the positioning element releases the lock between the second stage arm and the first stage arm.

2. The support leg as described in claim 1, characterized in that, The first elastic element is disposed inside the first stage arm, and one end of the first elastic element abuts against the inner wall of the first stage arm, while the other end of the first elastic element abuts against the end of the second stage arm that is inserted into the first stage arm.

3. The support leg as described in claim 1, characterized in that, The positioning element is rotatably mounted on the first stage arm. The positioning element has a positioning part located inside the first stage arm. A holding mechanism is provided at one end of the second stage arm that is inserted into the first stage arm. The positioning member can rotate relative to the first stage arm, causing the positioning part to rotate synchronously. This allows the positioning part to approach and engage the holding mechanism when the second stage arm retracts relative to the first stage arm, thereby locking the second stage arm relative to the first stage arm. Alternatively, the positioning part can move away from the first stage arm and release its engagement with the holding mechanism, thereby releasing the lock on the second stage arm relative to the first stage arm.

4. The support leg as described in claim 3, characterized in that, The holding mechanism includes a holding member, and the side wall of the holding member is provided with a holding groove. The holding groove is adapted to the positioning part. The positioning part is used to approach and hold the holding groove when the second-stage arm is retracted relative to the first-stage arm, so as to achieve locking of the second-stage arm relative to the first-stage arm.

5. The support leg as described in claim 4, characterized in that, The second-stage arm is inserted into the side wall of one end of the first-stage arm, and a groove is formed therein. The clamping mechanism also includes a second elastic member. A limiting post is provided on the side of the clamping member away from the clamping groove. The limiting post is located in the groove. The second elastic member is sleeved on the limiting post. One end of the second elastic member abuts against or connects to the side of the clamping member where the limiting post is provided. The other end of the second elastic member abuts against or connects to the groove wall.

6. The support leg as described in claim 1, characterized in that, Include at least one of the following: The first stage arm has two or more spaced cavities extending along its own axis. The number of the first elastic elements is the same as the number of the cavities and corresponds one-to-one. Each first elastic element is disposed in its corresponding cavity. The first stage arm includes a housing and a sleeve disposed on the housing, and two or more spaced-apart receiving cavities are formed in the sleeve; The second-stage arm includes a connecting locking member and a plug-in rod. The number of plug-in rods is the same as the number of receiving cavities and corresponds one-to-one. One end of each plug-in rod is slidably inserted into its corresponding receiving cavity and abuts against the corresponding first elastic member.

7. A stent, characterized in that, include: main body; A plurality of openable and retractable support legs as described in any one of claims 1-6, wherein the first stage arm of each support leg is rotatably connected to the main body, one end of the positioning member is rotatably connected to the first stage arm, and the other end of the positioning member is rotatably connected to the main body or the locking mechanism; The locking mechanism is located at one end of the main body. The locking mechanism is used to lock the second-stage arms of the plurality of support legs so that the support legs are kept in the retracted position. The locking mechanism is also used to unlock the plurality of second-stage arms so that the support legs are automatically extended to the open position. When the support legs are extended or retracted, they can drive the positioning member to rotate relative to the first-stage arm.

8. The bracket as described in claim 7, characterized in that, The locking mechanism has a protrusion at the end away from the main body. The bracket also includes an anti-touch mechanism, which includes a base and a rotating component. The base is connected to the locking mechanism, and the rotating component is rotatably sleeved on the protrusion and / or the base. The rotating member can rotate relative to the base to abut against the end of the second-stage arm away from the first elastic member, or to release the abutment against the second-stage arm.

9. The bracket as described in claim 8, characterized in that, The rotating member includes a sleeve portion and a supporting portion connected together. The sleeve portion is rotatably sleeved on the protrusion and / or the base. The supporting portion is polygonal and has multiple angles. The number of angles of the supporting portion is the same as the number of the supporting feet. The rotating member can rotate relative to the base so that the multiple angles of the supporting portion abut against one end of multiple second-stage arms away from the first elastic member, or cancel the abutment against multiple second-stage arms.

10. The bracket as claimed in claim 7, characterized in that, Include at least one of the following: The engaging component has a first engaging portion. The locking mechanism includes a mounting base, a third elastic element, and a sliding cover. The mounting base is disposed on the main body, and the sliding cover is slidably inserted into the mounting base. The third elastic element abuts between the mounting base and the sliding cover. The sliding cover has a second engaging portion. The number of second engaging portions is the same as the number of support legs and corresponds one-to-one. The second engaging portions are used to engage and fix the second-stage arms of a plurality of support legs so that the support legs are maintained in a folded position. The second engaging portion is a hook formed by the outward extension of the side wall of the sliding cover. The main body includes a main rod and a sleeve assembly connected together. The first stage arm of each support foot is rotatably connected to the main rod. The sleeve assembly includes a fourth elastic element and a first sliding sleeve and a second sliding sleeve that are sleeved and connected together. The first sliding sleeve is fixedly connected to the main rod, and the second sliding sleeve is fixedly connected to the locking mechanism. One end of the fourth elastic element is connected to the main rod, and the other end of the fourth elastic element is connected to the locking mechanism. The fourth elastic element is a tension spring.

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