Folding device with secondary self-locking structure

Abstract

The utility model discloses a folding device with a secondary self-locking structure, which comprises an upper mounting seat, a lower mounting seat and a trigger, the upper mounting seat, the lower mounting seat and the trigger are pivoted, the upper mounting seat and the lower mounting seat are butted to form an accommodating cavity, a positioning lock block is arranged in the accommodating cavity, the positioning lock block is connected or butted with the trigger, and the trigger is connected with the positioning lock block. The positioning locking block is in butt joint with and locked with the upper mounting base and the lower mounting base by rotating the trigger, or locking of the upper mounting base and the lower mounting base is relieved by rotating the trigger, a sliding way is arranged in the upper mounting base, a groove hole communicated with the containing cavity is formed in the sliding way, a ball is arranged in the groove hole, and a locking groove is formed in the upper surface of the positioning locking block. The bottoms of the balls penetrate through the groove holes to be clamped in the locking grooves to lock the positioning locking blocks, push rods are arranged in the sliding ways, the push rods press the balls downwards into the locking grooves in the initial state, and the push rods are pushed or pulled to enable the balls to move upwards to be separated from the locking grooves. The secondary self-locking structure is simple, stable in self-locking, safer and more reliable.

Description

Technical Field

[0001] The utility model relates to a connection structure, in particular to a folding device with a secondary self-locking structure. Background Art

[0002] Folding bicycles, folding electric vehicles and folding scooters all have a folding joint for the seat tube, which can be manually unfolded or folded. When unfolded for use, the handle is flipped to a state parallel to the seat tube, so that the seat tube can stand steadily. After folding, the whole vehicle can be put into a cabin case, a folding bag or a car trunk, which is easy to carry and use.

[0003] There are various forms of folding mechanisms installed on the seat tube in the prior art, but many folding mechanisms are easily unlocked or loosened due to misoperation for the sake of convenience. Therefore, considering the safety of folding bicycles, folding electric vehicles and scooters, a folding mechanism with a secondary self-locking structure is urgently needed. Utility Model Content

[0004] The utility model aims to provide a folding device with a secondary self-locking structure to solve the problem that the trigger of the existing folding structure is easy to loosen as mentioned in the background art.

[0005] The technical solution adopted by the utility model to solve the above technical problems is:

[0006] The folding device of claim 1, wherein the upper mounting seat, the lower mounting seat and the trigger are pivotally connected through a pivot axis, the upper mounting seat and the lower mounting seat being docked to form an accommodating cavity, a positioning locking block being provided in the accommodating cavity, the positioning locking block being connected or abutted with the trigger, and the positioning locking block can dock and lock the upper mounting seat and the lower mounting seat by rotating the trigger, or release the locking of the upper mounting seat and the lower mounting seat by rotating the trigger. A slide is provided in the upper mounting seat, the slide is provided with a slot hole connected to the accommodating cavity, a ball is provided in the slot hole, the upper surface of the positioning locking block is provided with a locking slot, the bottom of the ball passes through the slot hole and is clamped in the locking slot to limit the position of the positioning locking block, and a push rod is provided in the slide, and the push rod presses the ball down to be clamped in the locking slot in the initial state, and pushes or pulls the push rod so that the ball can move up and out of the locking slot.

[0007] Preferably, a return spring is provided between one end of the push rod and the slideway, and the other end of the push rod extends out of the slideway.

[0008] Preferably, the return spring is a tension spring or a compression spring. When the return spring is a tension spring, the ball can be moved up and out of the lock slot by pulling the push rod. When the return spring is a compression spring, the ball can be moved up and out of the lock slot by pushing the push rod.

[0009] Preferably, the middle portion of the push rod has an annular groove to form an annular accommodating portion, and pushing or pulling the push rod enables the ball to move upward and partially enter the annular accommodating portion.

[0010] Preferably, when the return spring is a compression spring, the end of the annular accommodation portion close to the return spring has a conical guide surface, and in the initial state, the conical guide surface or the push rod body connected to the conical guide surface presses the ball bearing to the locking groove;

[0011] When the return spring is a tension spring, the end of the annular accommodating portion away from the return spring has a conical guide surface. In the initial state, the conical guide surface or the push rod body connected to the conical guide surface presses the ball down to the locking groove.

[0012] Preferably, a self-locking block and a driving member are provided on the trigger, and a limited position surface is provided on the upper mounting seat and / or the lower mounting seat, and the self-locking block can extend outward or retract into the trigger;

[0013] When the driving member pushes the self-locking block to extend out of the trigger, the limiting surface prevents the self-locking block from rotating and thus prevents the trigger from rotating; when the self-locking block retracts the trigger, the trigger can rotate relative to the upper mounting seat and the lower mounting seat and thus release the lock.

[0014] Preferably, the trigger comprises a handle body, the edge of the handle body is provided with a convex edge, the self-locking block and the driving member are arranged in the circumference, the circumference is provided with a notch, and the self-locking block can extend through the notch under the pushing action of the driving member.

[0015] Preferably, the driving member includes a torsion spring and a toggle member, the handle body is provided with a positioning column or a positioning sleeve, the toggle member is sleeved on the outside of the positioning column or inserted into the positioning sleeve through a positioning shaft, the toggle member can rotate around the positioning column, the toggle member pushes the self-locking block to extend out of the slot or retract, the torsion spring provides power for the toggle member, so that the toggle member keeps pushing the self-locking block to extend out of the slot in the initial state.

[0016] Preferably, a notch is provided on the surrounding edge, the toggle member includes a driving rod and a toggle rod, the toggle rod extends through the notch, and a positioning assembly is provided between the driving rod and the self-locking block, so that the self-locking block can extend or retract during the rotation of the driving rod.

[0017] Preferably, the torsion spring is sleeved on the outside of the positioning column, one end of the torsion spring is bent and positioned between the driving rod and the toggle rod, and the other end of the torsion spring is bent and abuts against the inner side surface of the surrounding edge.

[0018] Compared with the prior art, the advantages of the utility model are:

[0019] The upper mounting seat and the lower mounting seat are matched, and the trigger is flipped upward to make the positioning lock block move away from the pivot axis, and the position of the upper mounting seat and the lower mounting seat is locked. By setting a self-locking block on the trigger and extending the trigger to abut against the limit surface, the trigger is effectively prevented from flipping downward, and the trigger is self-locked once, which is not easy to loosen, and has better structural stability and reliability; the ball in the upper mounting seat is stuck in the lock groove under the action of the push rod, and the position of the positioning lock block is locked, the trigger is locked, and the positioning lock block is locked, forming a double self-locking structure with better structural stability. When unlocking is required, it is necessary to push or pull the push rod first to release the position lock of the ball so that the ball has space to move upward. At this time, the toggle piece is pulled to retract the self-locking block. At this time, the trigger can be flipped downward, and the ball is disengaged from the lock groove upward to release the lock of the positioning lock block. The positioning lock block moves toward the pivot axis under the action of the compression spring to release the lock of the upper mounting seat and the lower mounting seat. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 The structure of the folding device in the utility model is shown in FIG. Figure 1 ;

[0022] Figure 2 The cross-section diagram of the folding device in the utility model is shown in FIG. Figure 1 ;

[0023] Figure 3 It is a structural schematic diagram of the push rod in the utility model;

[0024] Figure 4 It is a cross-sectional schematic diagram of the upper mounting seat in the utility model;

[0025] Figure 5 The structure of the folding device in the utility model is shown in FIG. Figure 2 ;

[0026] Figure 6 The cross-section diagram of the folding device in the utility model is shown in FIG. Figure 2 ;

[0027] Figure 7 The structure of the folding device in the utility model is shown in FIG. Figure 3 ;

[0028] Figure 8 It is a partial structural schematic diagram of the folding device in the utility model;

[0029] Fig. 9 It is a structural schematic diagram of the wrench in the utility model;

[0030] Fig.10 Schematic diagram of the structure of the driving member and the self-locking block in this embodiment.

[0031] In the figure: 11, upper mounting seat; 111, slideway; 112, slot; 114, pivoting leg; 115, first ridge; 12, lower mounting seat; 121, limiting surface; 122, second ridge; 13, accommodating cavity; 2, trigger; 21, handle body; 211, surrounding edge; 212, notch; 213, positioning column; 214, notch; 215, arc surface; 3, positioning lock block; 31 , locking groove; 32, locking end; 321, groove; 322, accommodating groove; 323, compression spring; 33, abutting end; 41, ball; 42, push rod; 421, annular accommodating portion; 422, conical guide surface; 43, return spring; 5, pivot shaft; 6, self-locking block; 7, driving member; 71, torsion spring; 72, toggle member; 721, driving rod; 722, toggle rod; 81, slot. DETAILED DESCRIPTION

[0032] The technical solution of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present utility model, rather than all of the embodiments.

[0033] The components of the embodiments of the present invention generally described and shown in the drawings herein can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention.

[0034] Based on the embodiments of the present utility model, all other embodiments obtained by ordinary technicians in the field without making any creative work shall fall within the scope of protection of the present utility model.

[0035] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0036] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] Embodiment 1,

[0038] A folding device with a self-locking structure, combined with Figure 1-10 As shown, the trigger 2 includes an upper mounting seat 11, a lower mounting seat 12 and a trigger 2, and the upper mounting seat 11, the lower mounting seat 12 and the trigger 2 are pivotally connected through a pivot axis 5. In this embodiment, the two pivot legs 114 of the upper mounting seat 11 are covered on the outer sides of the two pivot legs 114 of the lower mounting seat 12, and the trigger 2 is located at the middle position of the pivot axis 5.

[0039] In this embodiment, the lower end surface of the upper mounting seat 11 and the upper end surface of the lower mounting seat 12 are flush, and a receiving cavity 13 is formed after docking. A positioning locking block 3 is provided in the receiving cavity 13. The end of the positioning locking block 3 away from the pivot axis 5 is a locking end 32. The locking end 32 moves close to the upper mounting seat 11 and the lower mounting seat 12, and docks and engages with the upper mounting seat 11 and the lower mounting seat 12 to achieve position locking, or the locking end 32 is moved toward the side of the pivot axis 5 by rotating the trigger 2, disengaging from the upper mounting seat 11 and the lower mounting seat 12 to release the lock.

[0040] Specifically, the locking end 32 of the positioning locking block 3 has a groove 321, the lower edge of the upper mounting seat 11 has a first ridge 115 extending inward, and the upper edge of the lower mounting seat 12 has a second ridge 122 extending inward. When the first ridge 115 and the second ridge 122 are stuck in the groove 321, the positioning locking block 3 locks the position of the upper mounting seat 11 and the lower mounting seat 12 so that the two remain aligned, that is, in an upright state.

[0041] The locking end 32 of the positioning lock block 3 has a radially extending receiving groove 322, in which a compression spring 323 is arranged, one end of the compression spring 323 abuts against the bottom of the receiving groove 322, and the other end abuts against the inner side surface of the upper mounting seat 11, and the compression spring 323 provides power for the positioning lock block 3 to move toward the pivot shaft 5. Those skilled in the art should understand that the other end of the compression spring 323 can also abut against the inner side surface of the lower mounting seat 12.

[0042] A slideway 111 is provided in the upper mounting seat 11, and a slot hole 112 communicating with the accommodating chamber 13 is provided in the slideway 111, and a ball 41 is provided in the slot hole 112. A locking groove 31 is provided on the upper surface of the positioning lock block 3, and the bottom of the ball 41 passes through the slot hole 112 and is stuck in the locking groove 31 to limit the position of the positioning lock block 3. A push rod 42 is provided in the slideway 111, and the push rod 42 presses the ball 41 downward to be stuck in the locking groove 31 in the initial state, and pushes or pulls the push rod 42 so that the ball 41 can move up and out of the locking groove 31. The locking groove 31 is perpendicular to the pivot shaft 5, and one end of the locking groove 31 close to the pivot shaft 5 extends to the outer side surface of the positioning lock block 3, and when the ball 41 is stuck in the locking groove 31, it is stuck in the other end of the locking groove 31.

[0043] A return spring 43 is provided between one end of the push rod 42 and the slideway 111, and the other end of the push rod 42 extends out of the slideway 111. The return spring 43 is a tension spring or a compression spring. When the return spring 43 is a tension spring, the ball 41 can be moved upward and out of the lock slot 31 by pulling the push rod 42. When the return spring 43 is a compression spring, the ball 41 can be moved upward and out of the lock slot 31 by pushing the push rod 42.

[0044] The middle part of the push rod 42 has an annular groove to form an annular accommodating portion 421 . Pushing or pulling the push rod 42 enables the ball 41 to move upward and partially enter the annular accommodating portion 421 .

[0045] When the return spring 43 is a compression spring, the end of the annular accommodating portion 421 close to the return spring 43 has a tapered guide surface 422 . In the initial state, the tapered guide surface 422 or the push rod body connected to the tapered guide surface 422 presses the ball 41 down to the locking groove 31 .

[0046] When the return spring 43 is a tension spring, the end of the annular accommodating portion 421 away from the return spring has a conical guide surface 422 . In the initial state, the conical guide surface 422 or the push rod body connected to the conical guide surface 422 presses the ball 41 down to the locking groove 31 .

[0047] The trigger 2 is connected to the pivot shaft 5 through an eccentric hole. The trigger 2 has an arc surface 215 arranged around the periphery of the eccentric hole. The arc surface 215 abuts against the positioning lock block 3. When the trigger 2 rotates, the trigger 2 realizes the movement of the positioning lock block 3 toward or away from the pivot shaft 5 through the difference in radial distance between the arc surface 215 and the eccentric hole. In this embodiment, when the trigger 2 is flipped upward to be close to the vertical pipe connected to the upper mounting seat 11, the distance between the arc surface 215 and the eccentric hole is the largest. At this time, the positioning lock block 3 moves away from the pivot shaft 5 and locks the positions of the upper mounting seat 11 and the lower mounting seat 12. When the trigger 2 is flipped downward, the distance between the arc surface 215 and the eccentric hole becomes smaller until the positioning lock block 3 can be released from the lower mounting seat 12, and folding can be achieved. In this embodiment, the positioning lock block 3 includes a locking end 32 with a groove 321, and an abutting end 33 with a concave arc structure abutting against the arc surface 215.

[0048] The trigger 2 is provided with a self-locking block 6 and a driving member 7. When the upper mounting seat 11 and the lower mounting seat 12 are locked, the trigger 2 remains close to the riser and does not loosen. A limited position surface 121 is provided on the upper mounting seat 11 and / or the lower mounting seat 12, and the self-locking block 6 can extend outward or retract the trigger 2; when the driving member 7 pushes the self-locking block 6 to extend out of the trigger 2, the limited position surface 121 prevents the self-locking block 6 from rotating and thus prevents the trigger 2 from rotating; when the self-locking block 6 retracts the trigger 2, the trigger 2 can rotate relative to the upper mounting seat 11 and the lower mounting seat 12 and thus release the lock.

[0049] Specifically, in this example, a limiting surface 121 is provided on the lower mounting seat 12. When the driving member 7 pushes the self-locking block 6 out of the trigger 2, since the limiting surface 121 is located on the rotation path of the self-locking block 6, it can abut against the self-locking block 6 and prevent the trigger 2 from rotating.

[0050] The trigger 2 includes a handle body 21 , the edge of which is provided with a rim 211 , the self-locking block 6 and the driving member 7 are arranged in the rim 211 , and the rim 211 is provided with a notch 212 , through which the self-locking block 6 can extend under the pushing action of the driving member 7 .

[0051] The driving member 7 includes a torsion spring 71 and a toggle member 72. The handle body 21 is provided with a positioning column 213 or a positioning sleeve. The toggle member 72 is sleeved on the outside of the positioning column 213 or inserted into the positioning sleeve through a positioning shaft. The toggle member 72 can rotate around the positioning column 213. The toggle member 72 pushes the self-locking block 6 to extend out of the notch 212 or retract. The torsion spring 71 provides power for the toggle member 72, so that the toggle member 72 keeps pushing the self-locking block 6 to extend out of the notch 212. In this embodiment, the positioning column 213 adopts an internal thread column, and the torsion spring 71 and the toggle member 72 are limitedly installed on the trigger 2 by bolts and gaskets.

[0052] As shown in the figure, in this embodiment, two notches 212 are provided, which are horizontally distributed on both sides of the lower part of the trigger 2. The self-locking block 6 is parallel to the pivot axis 5, and the two ends of the self-locking block 6 are respectively stuck in the notches 212. One end of the self-locking block 6 can extend out of one of the notches 212 under the pushing action of the toggle member 72, but the other end of the self-locking block 6 will not be separated from the notch 212 on the other side, that is, the self-locking block 6 reciprocates in the two notches 212.

[0053] A notch 214 is provided on the surrounding edge 211, and the toggle member 72 includes a driving rod 721 and a toggle rod 722. The toggle rod 722 extends out through the notch 214, so that the user can pull the toggle rod 722 to drive the driving rod 721 to rotate. A positioning assembly is provided between the driving rod 721 and the self-locking block 6, so that the self-locking block 6 can extend or retract during the rotation of the driving rod 721.

[0054] The torsion spring 71 is sleeved on the outside of the positioning column 213, one end of the torsion spring 71 is bent and positioned between the driving rod 721 and the toggle rod 722, and the other end of the torsion spring 71 is bent and abuts against the inner side of the surrounding edge 211. In this embodiment, there is an obtuse angle between the driving rod 721 and the toggle rod 722, and the toggle rod 722 extends upward through the notch 214. One end of the torsion spring 71 is bent and stuck in the obtuse angle, and abuts against the driving rod 721, providing power for the driving rod 721 to push the self-locking block 6 outward, and the other end of the torsion spring 71 abuts against the inner side of the surrounding edge 211, and in this embodiment, it abuts against the inner side of the surrounding edge 211 without the notch 214, so that the torsion spring 71 has a certain torque, which pushes the driving rod 721 to rotate and pushes the self-locking block 6 to keep extending out of the notch 212.

[0055] The positioning assembly includes a slot 81 and a protrusion, one of which is provided on the self-locking block 6, and the other is provided on the driving rod 721. Specifically, in this embodiment, the slot 81 is provided on the self-locking block 6, the bottom of the slot 81 is arc-shaped and matches the protrusion at the end of the driving rod 721, and the inner walls on both sides of the opening of the slot 81 are perpendicular to the movement path of the self-locking block 6 on one side and inclined on the other side, so that the opening of the slot 81 is larger than the protrusion, and the inclined inner wall is closer to the notch 212 extending from the self-locking block 6.

[0056] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A folding device with a secondary self-locking structure, comprising an upper mounting seat (11), a lower mounting seat (12) and a trigger (2), wherein the upper mounting seat (11), the lower mounting seat (12) and the trigger (2) are pivotally connected, the upper mounting seat (11) and the lower mounting seat (12) are butted together to form a receiving cavity (13), a positioning locking block (3) is arranged in the receiving cavity (13), the positioning locking block (3) is connected to or abuts against the trigger (2), the positioning locking block (3) is butted against and locked with the upper mounting seat (11) and the lower mounting seat (12) by rotating the trigger (2), or the locking of the upper mounting seat (11) and the lower mounting seat (12) is released by rotating the trigger (2), characterized in that: A slideway (111) is provided in the upper mounting seat (11), a slot hole (112) communicating with the accommodating chamber (13) is provided in the slideway (111), a ball (41) is provided in the slot hole (112), a locking groove (31) is provided on the upper surface of the positioning lock block (3), the bottom of the ball (41) passes through the slot hole (112) and is locked in the locking groove (31) to lock the positioning lock block (3), a push rod (42) is provided in the slideway (111), and the push rod (42) presses the ball (41) downward into the locking groove (31) in an initial state, and pushes or pulls the push rod (42) so that the ball (41) can move upward and escape from the locking groove (31).

2. A folding device with a secondary self-locking structure according to claim 1, characterized in that: A return spring (43) is provided between one end of the push rod (42) and the slideway (111), and the other end of the push rod (42) extends out of the slideway (111).

3. A folding device with a secondary self-locking structure according to claim 2, characterized in that: The return spring (43) is a tension spring or a compression spring (323). When the return spring (43) is a tension spring, the ball (41) can be moved upward and out of the lock groove (31) by pulling the push rod (42). When the return spring (43) is a compression spring (323), the ball (41) can be moved upward and out of the lock groove (31) by pushing the push rod (42).

4. A folding device with a secondary self-locking structure according to claim 3, characterized in that: The middle part of the push rod (42) has an annular groove (321) to form an annular accommodating portion (421). Pushing or pulling the push rod (42) enables the ball (41) to move upward and partially enter the annular accommodating portion (421).

5. The folding device with a secondary self-locking structure according to claim 4, characterized in that: When the return spring (43) is a compression spring, the end of the annular accommodation portion (421) close to the return spring (43) has a conical guide surface (422), and in an initial state, the conical guide surface (422) or the main body of the push rod (42) connected to the conical guide surface (422) presses the ball (41) down to the locking groove (31); When the return spring (43) is a tension spring, the end of the annular accommodating portion (421) away from the return spring (43) has a conical guide surface (422), and in the initial state, the conical guide surface (422) or the main body of the push rod (42) connected to the conical guide surface (422) presses the ball (41) down to the locking groove (31).

6. A folding device with a secondary self-locking structure according to any one of claims 1 to 5, characterized in that: The trigger (2) is provided with a self-locking block (6) and a driving member (7); a limited position surface (121) is provided on the upper mounting seat (11) and / or the lower mounting seat (12); and the self-locking block (6) can extend outward or retract into the trigger (2); When the driving member (7) pushes the self-locking block (6) to extend out of the trigger (2), the limiting surface (121) prevents the self-locking block (6) from rotating and thereby prevents the trigger (2) from rotating; when the self-locking block (6) retracts the trigger (2), the trigger (2) can rotate relative to the upper mounting seat (11) and the lower mounting seat (12) and thereby release the lock.

7. The folding device with a secondary self-locking structure according to claim 6, characterized in that: The trigger handle (2) comprises a handle body (21), the edge of the handle body (21) is provided with a convex edge (211), the self-locking block (6) and the driving member (7) are arranged in the convex edge (211), the convex edge (211) is provided with a notch (212), and the self-locking block (6) can be extended through the notch (212) under the pushing action of the driving member (7).

8. The folding device with a secondary self-locking structure according to claim 7, characterized in that: The driving member (7) comprises a torsion spring (71) and a toggle member (72); the handle body (21) is provided with a positioning column (213) or a positioning sleeve; the toggle member (72) is sleeved on the outside of the positioning column (213) or inserted into the positioning sleeve through a positioning shaft; the toggle member (72) can rotate around the positioning column (213); the toggle member (72) pushes the self-locking block (6) to extend out of the notch (212) or retract; the torsion spring (71) provides power for the toggle member (72) so that the toggle member (72) keeps pushing the self-locking block (6) to extend out of the notch (212) in the initial state.

9. The folding device with a secondary self-locking structure according to claim 8, characterized in that: A notch (214) is provided on the surrounding edge (211); the toggle member (72) comprises a driving rod (721) and a toggle rod (722); the toggle rod (722) extends through the notch (214); and a positioning assembly is provided between the driving rod (721) and the self-locking block (6), so that the self-locking block (6) can extend or retract during the rotation of the driving rod (721).

10. The folding device with a secondary self-locking structure according to claim 9, characterized in that: The torsion spring (71) is sleeved on the outside of the positioning column (213), one end of the torsion spring (71) is bent and positioned between the driving rod (721) and the toggle rod (722), and the other end of the torsion spring (71) is bent and abuts against the inner side of the surrounding edge (211).

Images