Leg with locking and unlocking mechanism

Abstract

The utility model provides a foot stool with locking and unlocking mechanism, including pull rod subassembly, fixed base, sliding sleeve, a plurality of support feet, connecting rod and locking and unlocking mechanism, the locking and unlocking mechanism includes button and buckle elastic sheet, the button can be up and down activityly assembled in the bottom of fixed base to switch between an unlocking position and a locking position, buckle elastic sheet is fixed between fixed base and button, buckle elastic sheet includes a plurality of elastic buckle parts, the elastic buckle part is buckled on the joint part and locks the support foot when the support foot is in the folding position, button and each elastic buckle part abut, the elastic buckle part has the elastic force of making button keep in the locking position, when button switches to the unlocking position, pushes away the joint part of elastic buckle part and unlocks the support foot, the utility model discloses setting the locking structure on the buckle elastic sheet, and the button is flexible, and the unlocking operation is simple and quick, and the simple structure is convenient for installation and implementation.

Description

Technical Field

[0001] This utility model relates to the field of photographic equipment, and in particular to a tripod with a locking and unlocking mechanism. Background Technology

[0002] Existing tripods, such as the automatically deployable tripod disclosed in Chinese Utility Model Patent CN222230127 U, utilize a locking and unlocking mechanism at the bottom of the pull rod assembly. This mechanism locks the support legs in a closed position and unlocks them to automatically deploy. The locking and unlocking mechanism includes a button, a button holder, and a spring. The button holder has a connecting post, which is fixed to the holder with screws. The button is movably mounted on the button holder, and the spring is sleeved on the connecting post and abuts against the button. Each support leg has a locking protrusion at one end, and the button has a locking hole that engages with the locking protrusion. When the support legs are closed, the locking protrusion engages with the locking hole. However, this locking and unlocking mechanism involves many parts, making assembly cumbersome. Furthermore, the locking hole is located on the button, making it easy for the button to be jammed by the locking protrusion during pressing, leading to unlocking failure and requiring repeated button presses, thus impacting the user experience. Utility Model Content

[0003] The purpose of this utility model is to provide a tripod with a locking and unlocking mechanism, including a pull rod assembly, a fixed base, a sliding sleeve, several support feet, connecting rods, and a locking and unlocking mechanism; the fixed base is installed at the bottom of the pull rod assembly; the sliding sleeve is slidably fitted onto the pull rod assembly; the first end of each support foot is hinged to the sliding sleeve so that the second end of the support foot can switch between an extended position away from the pull rod assembly and a closed position close to the pull rod assembly; each connecting rod corresponds to a support foot, with one end of the connecting rod rotatably connected to the corresponding support foot and the other end of the connecting rod rotatably connected to the fixed base; the locking and unlocking mechanism is located at the bottom of the pull rod assembly, used to lock the second end of each support foot to keep it in the closed position, and used to unlock each support foot... The second end of the support leg allows it to be switched to an unfolded position; the locking and unlocking mechanism includes a button and a snap-fit ​​spring; the button is movably mounted on the bottom of the fixed base to switch between an unlocked position and a locked position; the snap-fit ​​spring is fixed between the fixed base and the button; the snap-fit ​​spring includes several elastic snap-fit ​​parts, each corresponding to a support leg; the inner side of the second end of the support leg is provided with a snap-fit ​​part; when the support leg is in the closed position, the elastic snap-fit ​​part snaps onto the snap-fit ​​part to lock the support leg; the button abuts against each elastic snap-fit ​​part, and the elastic snap-fit ​​part has a spring force to keep the button in the locked position; when the button is switched to the unlocked position, it pushes the elastic snap-fit ​​part away from the snap-fit ​​part to unlock the support leg.

[0004] The locking and unlocking mechanism of this utility model locks and unlocks the support leg through the cooperation of a button and a snap-fit ​​spring. The locking structure that cooperates with the support leg is located on the snap-fit ​​spring. The button moves flexibly, and the unlocking operation is simple and quick. Furthermore, after unlocking, the button resets due to the elastic force of the snap-fit, eliminating the need for an additional reset spring, simplifying the structure and facilitating installation and implementation. Attached Figure Description

[0005] Figure 1 This is a schematic diagram of the supporting leg of this utility model in the unfolded position.

[0006] Figure 2 This is a schematic diagram of the structure of the support leg of this utility model in the closed position.

[0007] Figure 3 This is a schematic diagram of the cooperation structure between the locking and unlocking mechanism and the fixed base of this utility model.

[0008] Figure 4 This is a cross-sectional view of the locking and unlocking mechanism and the fixed base of this utility model.

[0009] Figure 5 and Figure 6 This is an exploded view of the locking and unlocking mechanism and the fixed base of this utility model at different angles.

[0010] Figure 7 This is a schematic diagram of the support foot of this utility model.

[0011] Figure 8 This is a cross-sectional view of the engagement structure between the snap-fit ​​spring and the support foot when the button of this utility model is in the locked position. Detailed Implementation

[0012] The following description, in conjunction with the accompanying drawings, further illustrates the proposed solution: See appendix Figure 1-8 A tripod with a locking and unlocking mechanism includes a pull rod assembly 1, a fixed base 2, a sliding sleeve 3, several support feet 4, connecting rods 5, and a locking and unlocking mechanism. The pull rod assembly 1 includes multiple pull rods connected in sequence. The fixed base 2 is installed at the bottom of the pull rod assembly 1. The sliding sleeve 3 is slidably fitted onto the pull rod assembly 1. The first end of each support foot 4 is hinged to the sliding sleeve 3 so that the second end of the support foot 4 can switch between an extended position away from the pull rod assembly 1 and a closed position close to the pull rod assembly 1. Each connecting rod 5 corresponds to a support foot 4, with one end of the connecting rod 5 rotatably connected to the corresponding support foot 4 and the other end of the connecting rod 5 rotatably connected to the fixed base 2. The locking and unlocking mechanism is located at the bottom of the pull rod assembly 1 and is used to lock the second end of each support foot 4 to keep it in the closed position and to unlock the second end of each support foot 4 to switch to the extended position.

[0013] The locking and unlocking mechanism includes a button 6 and a snap-fit ​​spring 7. The button 6 is movably mounted on the bottom of the fixed base 2 to switch between an unlocked position and a locked position. The snap-fit ​​spring 7 is fixed between the fixed base 2 and the button 6. The snap-fit ​​spring 7 includes several elastic snap-fit ​​parts, each corresponding to a support leg 4. The inner side of the second end of the support leg 4 is provided with a snap-fit ​​part. When the support leg 4 is in the closed position, the elastic snap-fit ​​part snaps onto the snap-fit ​​part to lock the support leg 4. The button 6 abuts against each elastic snap-fit ​​part, and the elastic snap-fit ​​part has the elasticity to keep the button 6 in the locked position. When the button 6 is switched to the unlocked position, it pushes the elastic snap-fit ​​part away from the snap-fit ​​part to unlock the support leg 4.

[0014] The elastic buckle includes an outwardly extending elastic arm 71 and a buckle protrusion 72 located at the extended end of the elastic arm 71; the button 6 is provided with a plurality of contact points 61, each contact point 61 corresponding to one of the elastic buckle parts; each contact point 61 abuts against each elastic arm 71; the buckle protrusion 72 protrudes downward, and the latching part is a slot 41 with the slot opening facing upward. When the support foot 4 is in the closed position, the buckle protrusion 72 falls into the slot 41 and latches onto the slot wall of the slot 41.

[0015] In this embodiment, there are three supporting feet, and three elastic buckles and three corresponding antennae are provided.

[0016] The buckle protrusion 72 is V-shaped, and the shape of the slot 41 corresponds to the buckle protrusion 72. The buckle protrusion 72 of this technical solution is V-shaped, and its outer side is inclined from top to bottom and inward, which has a guiding function and facilitates the buckle protrusion 72 to enter the slot 41.

[0017] The snap-fit ​​spring 7 is a one-piece stamped metal sheet, and the processing technology is mature and easy to implement.

[0018] The button 6 and the snap-fit ​​spring 7 are connected to the fixed base 2 via a fastener 8. The button 6 has a first connecting hole 62, the snap-fit ​​spring 7 has a second connecting hole 73, and the fixed base 2 has a third connecting hole 21. The fastener 8 passes through the first connecting hole 62, the second connecting hole 73, and the third connecting hole 21 in sequence. The fastener 8 includes a cap 81, a post 82, and a screw 83 connected in sequence. The diameters of the cap 81, the post 82, and the screw 83 decrease in sequence. The post 82 passes through the first connecting hole 62, and the button 6 can move up and down along the post 82. The screw 83 passes through the second connecting hole 73 and is screwed to the third connecting hole 21. The post 82 abuts against the snap-fit ​​spring 7 to clamp the snap-fit ​​spring 7 between the post 82 and the fixed base 2.

[0019] In this embodiment, the fastener 8 is a pin screw. Two fasteners 8 are provided, and the number of the first connecting hole 62, the second connecting hole 73, and the third connecting hole 21 corresponds to the number of fasteners 8. The two fasteners 8 improve the stability of the connection and the stability of the button 6's movement.

[0020] This technical solution uses a fastener 8 with a specific structure to connect the button 6 and the snap-fit ​​spring 7 to the fixed base 2. That is, the button 6 and the snap-fit ​​spring 7 can be installed and fixed at the same time without the need to use different connectors for installation and fixation. The installation steps are simple and easy to implement.

[0021] The lower end of the first connecting hole 62 is provided with a recess 621, and the cap 81 is received in the recess 621; a protective cover 9 is installed on the bottom of the button 6, and the protective cover 9 covers the recess 621 to cover the fastener 8. Specifically, the bottom of the button 6 is provided with a recess, and the protective cover 9 is installed in the recess and fixed by existing methods such as adhesive.

[0022] The bottom of the fixing base 2 is provided with a connecting part 22, and the third connecting hole 21 is provided on the connecting part 22. The connecting part 22 abuts against the snap-fit ​​spring 7. By the protruding connecting part 22 abutting against the snap-fit ​​spring 7, the lower part of the fixing base 2 has a space for the elastic snap-fit ​​part to deform elastically.

[0023] The bottom of the fixing base 2 is also provided with a limiting part 23, which is located above the elastic buckle part and is used to limit the deformation space when the elastic buckle part is pushed away from the locking part, so as to prevent the elastic buckle part from being over-deformed and failing.

[0024] When the tripod is in use, pressing button 6 and moving it to the unlock position will push the elastic buckle away from the locking part and unlock the support leg 4, allowing the support leg 4 to rotate to the unfolded position for support; after unlocking, button 6 returns to the locked position under the elastic force of the elastic buckle.

[0025] After the tripod is finished using it, rotating the support leg 4 to the closed position will cause the elastic buckle to engage with the locking part, thus locking the support leg 4 and keeping it in the closed position.

[0026] The locking and unlocking mechanism of this technical solution uses button 6 and snap-fit ​​spring 7 to lock and unlock support leg 4. The locking structure that engages with support leg 4 is located on snap-fit ​​spring 7. Button 6 moves flexibly, and unlocking is simple and quick. Furthermore, after unlocking, button 6 returns to its original position due to the elastic force of the snap-fit, eliminating the need for an additional return spring, simplifying the structure and facilitating installation and implementation.

[0027] In this embodiment, a torsion spring is provided between the support leg 4 and the sliding sleeve to enable the support leg 4 to automatically unfold after unlocking. Other existing automatic unfolding structures can also be used, such as the automatic unfolding leg disclosed in Chinese Utility Model Patent CN222230127 U.

[0028] The above preferred embodiments should be regarded as illustrative examples of the embodiments of the present application. Any technical deductions, substitutions, improvements, etc. that are similar to or based on the present application should be considered within the scope of protection of this patent.

Claims

1. A tripod with a locking and unlocking mechanism, comprising a pull rod assembly, a fixed base, a sliding sleeve, a plurality of support legs, connecting rods, and a locking and unlocking mechanism; the fixed base is mounted on the bottom of the pull rod assembly; the sliding sleeve is slidably fitted onto the pull rod assembly; the first end of each support leg is hinged to the sliding sleeve so that the second end of the support leg can be switched between an extended position away from the pull rod assembly and a closed position close to the pull rod assembly; each connecting rod corresponds to a support leg, one end of the connecting rod is rotatably connected to the corresponding support leg, and the other end of the connecting rod is rotatably connected to the fixed base; the locking and unlocking mechanism is located at the bottom of the pull rod assembly, used to lock the second end of each support leg to keep it in the closed position, and used to unlock the second end of each support leg to switch to the extended position; characterized in that: The locking and unlocking mechanism includes a button and a snap-fit ​​spring; The button is movably mounted on the bottom of the base to switch between an unlocked position and a locked position; The snap-fit ​​spring is fixed between the fixing base and the button; The snap-fit ​​spring includes several elastic snap-fit ​​parts, and each elastic snap-fit ​​part corresponds to a support foot. The inner side of the second end of the support leg is provided with a locking part; the elastic buckle part is fastened to the locking part and locks the support leg when the support leg is in the closed position; The button abuts against each of the elastic latches, and the elastic latches have a spring force that keeps the button in the locked position; When the button is switched to the unlock position, the elastic buckle is pushed away from the locking part to unlock the support foot.

2. The tripod with locking and unlocking mechanism according to claim 1, characterized in that: The elastic buckle includes an outwardly extending elastic arm and a buckle protrusion located at the extended end of the elastic arm. The button is provided with several antennae, each antennae corresponding to a one-to-one elastic buckle; each antennae abuts against a respective elastic arm. The buckle protrudes downwards, and the locking part is a slot with the opening facing upwards. When the support leg is in the closed position, the buckle protrusion falls into the slot and locks onto the slot wall.

3. The tripod with locking and unlocking mechanism according to claim 2, characterized in that: The buckle protrusion is V-shaped, and the shape of the buckle groove corresponds to the buckle protrusion.

4. The tripod with locking and unlocking mechanism according to claim 3, characterized in that: The snap-fit ​​spring is a metal sheet formed by one-piece stamping.

5. The tripod with locking and unlocking mechanism according to any one of claims 1-4, characterized in that: The button and the snap-fit ​​spring are connected to the fixed base by fasteners; The button has a first connecting hole, the snap-fit ​​spring has a second connecting hole, and the fixing base has a third connecting hole; the fastener passes through the first connecting hole, the second connecting hole, and the third connecting hole in sequence. The fastener comprises a cap, a post, and a threaded rod that are connected in sequence; the diameters of the cap, post, and threaded rod decrease sequentially. The column is inserted into the first connecting hole, and the button can move up and down along the column; the screw passes through the second connecting hole and is screwed into the third connecting hole, and the column abuts against the snap-fit ​​spring to clamp the snap-fit ​​spring between the column and the fixed base.

6. The tripod with locking and unlocking mechanism according to claim 5, characterized in that: The lower end of the first connecting hole is provided with a groove, and the cap is received in the groove; The bottom of the button is fitted with a protective cover that covers the recess.

7. The tripod with locking and unlocking mechanism according to claim 5, characterized in that: The bottom of the fixing base is provided with a connecting part, and the third connecting hole is provided on the connecting part, and the connecting part abuts against the snap-on spring piece; The bottom of the fixing base is also provided with a limiting part, which is located above the elastic buckle part and is used to limit the deformation space when the elastic buckle part is pushed away from the locking part.

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