Folding mechanism with secondary self-locking structure

Abstract

The utility model discloses a folding mechanism with a secondary self-locking structure, which comprises an upper mounting seat, a lower mounting seat and a trigger, the upper mounting seat is pivoted with the lower mounting seat, the trigger is pivoted with the lower mounting seat, the upper mounting seat is convexly provided with a locking block, the locking block is provided with a locking groove, the trigger is provided with a top block, and the top block is provided with a locking groove. A locking groove is formed in the upper mounting base, a self-locking piece is pivoted to the lower mounting base, after the upper mounting base and the lower mounting base are oppositely combined, the self-locking piece is matched with the locking groove to lock the upper mounting base and the lower mounting base, and an ejector block of the trigger piece is matched with the self-locking piece and / or the locking block to lock the upper mounting base and the lower mounting base. According to the application, the self-locking piece pivoted with the lower mounting seat is matched with the locking block of the upper mounting seat to realize locking, so that the risk of unlocking caused by opening the trigger handle by misoperation can be avoided; only when the trigger piece is turned downwards to the bottom, the trigger piece abuts against the lower end of the self-locking piece to push the self-locking piece to rotate and move upwards, the lock pin of the self-locking piece can be separated from the lock groove, and unlocking is achieved.

Description

Technical Field

[0001] The utility model relates to a connection structure, in particular to a folding mechanism 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 mechanism with a secondary self-locking structure, which improves the safety of the folding mechanism and is easy to operate.

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

[0006] A folding mechanism with a secondary self-locking structure comprises an upper mounting seat, a lower mounting seat and a trigger, the upper mounting seat and the lower mounting seat are pivotally connected, the trigger is pivotally connected to the lower mounting seat, the upper mounting seat is convexly provided with a locking block, the locking block is provided with a locking groove, the trigger is provided with a top block, and the lower mounting seat is pivotally connected with a self-locking piece. After the upper mounting seat and the lower mounting seat are aligned, the self-locking piece cooperates with the locking groove to lock the upper mounting seat and the lower mounting seat, and the top block of the trigger cooperates with the self-locking piece and / or the locking block to lock the upper mounting seat and the lower mounting seat.

[0007] Preferably, the locking groove is located on the upper end surface of the locking block, and the upper end of the self-locking member is provided with a locking pin, and the locking pin can be inserted into or removed from the locking groove as the trigger rotates.

[0008] Preferably, the lower mounting seat has a pivot seat, the self-locking member is pivotally connected to the pivot seat via a first pivot axis, the self-locking member is provided with a waist-shaped hole sleeved on the first pivot axis, and the locking pin is driven by a double-headed torsion spring to remain stuck in the lock groove.

[0009] Preferably, a protrusion is protruding from the lower part of the self-locking member, and the double-headed torsion spring includes a spiral portion, a connecting portion and an extension leg, the spiral portion is sleeved on the first pivot shaft, the extension leg is stuck in the pivot seat and cannot move, and the connecting portion is stuck in the protrusion, driving the locking pin to remain stuck in the lock groove.

[0010] Preferably, the pivot seat comprises two pivot legs, a limiting plate is provided between the two pivot legs, and the limiting plate is pressed above the extension leg to limit the movement of the extension leg.

[0011] Preferably, when the trigger is flipped downward to the bottom, the bottom of the trigger abuts against the lower end of the self-locking member to flip the upper end of the self-locking member outward, thereby causing the locking pin to disengage from the locking groove.

[0012] Preferably, the upper end of the top block is pivotally connected to the trigger, and the lower end of the top block has a slot structure for limiting engagement with the locking pin and / or the locking block.

[0013] Preferably, the slot structure has a slot opening facing downward, and is a trumpet-shaped slot with an opening that gradually expands, the slot body is arranged along the length direction of the top block, the middle part of the top block is provided with a limiting slide groove arranged along the length direction of the top block, the trigger is provided with a first slide groove corresponding to the limiting slide groove, the trigger is provided with a slider, the slider can slide along the limiting slide groove and the first slide groove, one side of the limiting slide groove has a notch, the slider is inserted into the limiting slide groove through the notch or detached from the limiting slide groove through the notch.

[0014] Preferably, an elastic member is provided between the trigger and the middle portion of the top block.

[0015] Preferably, the elastic member is a compression spring or a spring sheet. When the elastic member is a spring sheet, the upper end of the spring sheet is fixed to the trigger or the top block, and the lower end of the spring sheet is bent and abuts against the middle of the top block.

[0016] Compared with the prior art, the advantages of the utility model are:

[0017] 1. The present application realizes locking by cooperating the self-locking member pivotally connected to the lower mounting seat with the locking block of the upper mounting seat, and then the top block pivotally connected to the trigger presses downward against the locking pin of the self-locking member, and the position of the top block is limited by the slider being inserted into the limiting slide groove, thereby realizing locking after the upper mounting seat and the lower mounting seat are matched, and has excellent locking reliability;

[0018] 2. When unlocking, slide the slider upward to the notch of the limit slide groove, then flip the trigger downward, the slider can disengage from the limit slide groove, the top block and the trigger rotate in opposite directions, so that the lower end of the top block disengages from the locking pin. However, if the trigger is not flipped into place, the lower part of the trigger does not push the protrusion of the self-locking part. At this time, the upper mounting seat and the lower mounting seat are aligned and still remain in the locked state. This design can avoid the risk of unlocking due to accidental opening of the trigger. Only when the trigger is flipped downward to the bottom, the trigger abuts against the lower end of the self-locking part, pushing the self-locking part to rotate and move upward, can the locking pin of the self-locking part be disengaged from the lock slot to achieve unlocking. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] 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.

[0020] Figure 1 It is a structural schematic diagram of the folding mechanism in the utility model;

[0021] Figure 2 The explosion diagram of the folding mechanism in the utility model is shown in FIG. Figure 1 ;

[0022] Figure 3 It is a cross-sectional schematic diagram of the folding mechanism in the utility model;

[0023] Figure 4 It is a structural schematic diagram of the self-locking member in the utility model;

[0024] Figure 5 The explosion diagram of the folding mechanism in the utility model is shown in FIG. Figure 2 .

[0025] In the figure: 1. upper mounting seat; 11. locking block; 111. locking groove; 2. lower mounting seat; 21. pivot seat; 211. pivot leg; 22. first pivot axis; 23. limiting plate; 3. trigger; 31. top block; 311. slot structure; 312. limiting slide groove; 313. notch; 32. slider; 33. first slide groove; 34. third pivot axis; 4. self-locking member; 41. locking pin; 42. waist-shaped hole; 43. arc surface; 44. protrusion; 5. double-headed torsion spring; 51. spiral portion; 52. connecting portion; 53. extension foot; 6. elastic member. DETAILED DESCRIPTION

[0026] 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.

[0027] 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.

[0028] 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.

[0029] 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.

[0030] 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.

[0031] Example:

[0032] A folding mechanism with a secondary self-locking structure, combined Figure 1-5 As shown, it includes an upper mounting seat 1, a lower mounting seat 2 and a trigger 3, the upper mounting seat 1 and the lower mounting seat 2 are pivoted through a second pivot axis, the upper mounting seat 1 is connected to the vertical pipe, and the trigger 3 is pivoted to the lower mounting seat 2 through a first pivot axis 22, the first pivot axis 22 is parallel to the second pivot axis, and is respectively located at two ends of the radial direction of the lower mounting seat 2, and is arranged oppositely. That is, the pivoting sides of the upper mounting seat 1 and the lower mounting seat 2 and the pivoting side of the trigger 3 are respectively located on opposite sides of the lower mounting seat 2.

[0033] The upper mounting seat 1 is provided with a locking block 11 protruding outwardly in the radial direction. The locking block 11 is located above the first pivot axis 22 and is located at two ends of the lower mounting seat 2 in the radial direction with the second pivot axis.

[0034] A locking groove 111 is provided on the upper end surface of the locking block 11, and the extension direction of the locking groove 111 is parallel to the first pivot axis 22. A self-locking member 4 is pivoted on the lower mounting seat 2 through the first pivot axis 22, and the upper end of the self-locking member 4 has a locking pin 41. When the self-locking member 4 rotates, the locking pin 41 is stuck in the locking groove 111 or comes out of the locking groove 111, thereby realizing the locking of the upper mounting seat 1 and the lower mounting seat 2 after they are matched, or releasing the locking of the upper mounting seat 1 and the lower mounting seat 2.

[0035] Specifically, the lower mounting seat 2 has a pivot seat 21, and the pivot seat 21 includes two pivot legs 211. The self-locking member 4 is located between the two pivot legs 211 and is pivotally connected to the two pivot legs 211 through the first pivot shaft 22. Furthermore, the self-locking member 4 is provided with a waist-shaped hole 42 sleeved on the first pivot shaft 22. The waist-shaped hole 42 is provided so that the self-locking member 4 can move up and down relative to the first pivot shaft 22. The self-locking member 4 can move upward and flip over to disengage from the locking groove 111.

[0036] The self-locking component 4 drives the locking pin 41 to remain stuck in the locking groove 111 through the double-headed torsion spring 5. Specifically, the lower part of the self-locking component 4 has an arc surface 43 wrapped around the waist-shaped hole 42, and the lower part of the self-locking component 4 is provided with a protrusion 44 protruding from the arc surface 43. The double-headed torsion spring 5 includes a spiral portion 51, a connecting portion 52 and an extension leg 53. The spiral portion 51 is sleeved on the first pivot shaft 22, the extension leg 53 is stuck in the pivot seat 21 and cannot move, and the connecting portion 52 is stuck in the protrusion 44, driving the locking pin 41 to remain stuck in the locking groove 111.

[0037] A limit plate 23 is provided between the two pivotal legs 211 . The limit plate 23 is pressed onto the extension leg 53 by screws to limit the movement of the extension leg 53 , thereby making the double-headed torsion spring 5 have a certain torque to drive the locking pin 41 to remain stuck in the locking slot 111 .

[0038] A top block 31 is provided on the trigger 3 and is located above the locking block 11 . The lower end of the top block 31 of the trigger 3 cooperates with the self-locking member 4 and / or the locking block 11 to further lock the upper mounting seat 1 and the lower mounting seat 2 .

[0039] In this embodiment, the bottom of the top block 31 is locked on the locking pin 41, thereby achieving a secondary locking effect.

[0040] The upper end of the top block 31 is pivotally connected to the trigger 3, and the lower end of the top block 31 has a slot structure 311 for engaging with the lock pin 41. After the upper mounting seat 1 and the lower mounting seat 2 are aligned, the handle is rotated so that the lower end of the top block 31 abuts against the lock pin 41 to complete the secondary locking.

[0041] The top end of the top block 31 is pivotally connected to the trigger 3 via a third pivot axis 34, so that the top block 31 can swing to a certain extent relative to the trigger 3. A slot structure 311 is provided on the bottom end of the top block 31. During the locking process, the top block 31 enters the locking position with the handle, and the top block 31 gradually approaches the trigger 3 through the pivot position.

[0042] The slot of the slot structure 311 faces downward, and is a trumpet-shaped slot with a gradually expanding opening. The slot body is arranged along the length direction of the top block 31. During the locking process, the slot is engaged with the locking pin 41. The long slot body of the slot can make the slot have a certain elasticity, so that the slot can press the locking pin 41 when locking.

[0043] The middle part of the top block 31 is provided with a limiting slide groove 312 arranged along the length direction of the top block 31, the trigger 3 is provided with a first slide groove 33 corresponding to the limiting slide groove 312, and the trigger 3 is provided with a slider 32, which can slide along the limiting slide groove 312 and the first slide groove 33. The limiting slide groove 312 has a notch 313 on one side close to the trigger 3, and the slider 32 is inserted into the limiting slide groove 312 or separated from the limiting slide groove 312 through the notch 313. The setting of the limiting slide groove 312 and the slider 32 can limit the position of the top block 31 on the trigger 3, so that in the locked state, the lower end of the top block 31 is kept in engagement with the locking pin 41 to ensure the reliability of locking.

[0044] An elastic member 6 is provided between the trigger 3 and the middle part of the top block 31, and the elastic member 6 pushes the top block 31. When the slider 32 slides to the position where the limiting slide groove 312 has a notch 313, the elastic member 6 pushes the top block 31, so that the slider 32 disengages from the limiting slide groove 312 through the notch 313, so that the top block 31 maintains a certain angle with the handle in the unlocked state. In this way, it can be ensured that when the handle is rotated for locking, the slot on the top block 31 is always aligned with the locking pin 41, ensuring that the locking action can be effectively completed.

[0045] The elastic member 6 is a compression spring or a spring sheet. When the elastic member 6 is a spring sheet, the upper end of the spring sheet is fixed to the trigger 3 or the top block 31 , and the lower end of the spring sheet is bent and abuts against the middle of the top block 31 .

[0046] The folding mechanism with a secondary self-locking structure in the utility model, when locked, is locked once by the self-locking member 4 and the locking block 11 , and then locked twice by the top block 31 abutting against the locking pin 41 . When unlocking, by sliding the slider 32 upward to the notch 313 of the limiting slide groove 312, the trigger handle 3 is flipped downward, the slider 32 can disengage from the limiting slide groove 312, and the top block 31 and the trigger handle 3 rotate in the opposite direction to make the lower end of the top block 31 disengage from the locking pin 41. However, if the trigger 3 is not flipped into place, the lower part of the trigger 3 does not push the protrusion 44 of the self-locking member 4. At this time, the upper mounting seat 1 and the lower mounting seat 2 are still kept in alignment, and the self-locking member 4 and the locking block 11 are still kept in a locked state. This design can avoid the risk of unlocking due to accidental operation of opening the trigger 3; only when the trigger 3 is flipped downward to the bottom, the lower end of the trigger 3 abuts against the lower end protrusion 44 of the self-locking member 4, pushing the upper end of the self-locking member 4 to rotate outward and move upward, can the locking pin 41 of the self-locking member 4 be disengaged from the locking groove 111 to achieve unlocking.

[0047] 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 mechanism with a secondary self-locking structure, comprising an upper mounting seat (1), a lower mounting seat (2) and a trigger (3), wherein the upper mounting seat (1) and the lower mounting seat (2) are pivotally connected, and the trigger (3) is pivotally connected to the lower mounting seat (2), characterized in that: The upper mounting seat (1) is provided with a locking block (11), the locking block (11) is provided with a locking groove (111), the trigger (3) is provided with a top block (31), and the lower mounting seat (2) is pivotally connected with a self-locking member (4). After the upper mounting seat (1) and the lower mounting seat (2) are matched, the self-locking member (4) cooperates with the locking groove (111) to lock the upper mounting seat (1) and the lower mounting seat (2), and the top block (31) of the trigger (3) cooperates with the self-locking member (4) and / or the locking block (11) to lock the upper mounting seat (1) and the lower mounting seat (2).

2. A folding mechanism with a secondary self-locking structure according to claim 1, characterized in that: The locking groove (111) is located on the upper end surface of the locking block (11), and the upper end of the self-locking member (4) is provided with a locking pin (41), and the locking pin (41) can be inserted into the locking groove (111) or disengaged from the locking groove (111) as the trigger (3) rotates.

3. The folding mechanism with a secondary self-locking structure according to claim 2, characterized in that: The lower mounting seat (2) has a pivot seat (21), the self-locking member (4) is pivotally connected to the pivot seat (21) via a first pivot shaft (22), the self-locking member (4) is provided with a waist-shaped hole (42) sleeved on the first pivot shaft (22), and the locking pin (41) is driven by a double-headed torsion spring (5) to remain stuck in the locking groove (111).

4. The folding mechanism with a secondary self-locking structure according to claim 3, characterized in that: A protrusion (44) is protruding from the lower part of the self-locking member (4); the double-headed torsion spring (5) comprises a spiral portion (51), a connecting portion (52) and an extension leg (53); the spiral portion (51) is sleeved on the first pivot shaft (22); the extension leg (53) is stuck in the pivot seat (21) and cannot move; the connecting portion (52) is stuck in the protrusion (44), driving the locking pin (41) to remain stuck in the locking groove (111).

5. The folding mechanism with a secondary self-locking structure according to claim 4, characterized in that: The pivot seat (21) comprises two pivot legs (211), a limiting plate (23) is provided between the two pivot legs (211), and the limiting plate (23) is pressed above the extension leg (53) to limit the movement of the extension leg (53).

6. The folding mechanism with a secondary self-locking structure according to claim 4, characterized in that: When the trigger (3) is flipped downward to the bottom, the bottom of the trigger (3) abuts against the lower end of the self-locking member (4) to cause the upper end of the self-locking member (4) to flip outward, thereby causing the locking pin (41) to disengage from the locking slot (111).

7. The folding mechanism with a secondary self-locking structure according to claim 2, characterized in that: The upper end of the top block (31) is pivotally connected to the trigger (3), and the lower end of the top block (31) has a slot structure (311) for limited locking with the lock pin (41) and / or the lock block (11).

8. The folding mechanism with a secondary self-locking structure according to claim 7, characterized in that: The slot opening of the slot structure (311) faces downward, and is a trumpet-shaped slot opening with a gradually expanding opening. The slot body is arranged along the length direction of the top block (31). The middle part of the top block (31) is provided with a limiting slide groove (312) arranged along the length direction of the top block (31). The trigger (3) is provided with a first slide groove (33) corresponding to the limiting slide groove (312). The trigger (3) is provided with a slider (32). The slider (32) can slide along the limiting slide groove (312) and the first slide groove (33). One side of the limiting slide groove (312) has a notch (313). The slider (32) is inserted into the limiting slide groove (312) through the notch (313) or is separated from the limiting slide groove (312) through the notch (313).

9. The folding mechanism with a secondary self-locking structure according to claim 8, characterized in that: An elastic member (6) is provided between the trigger (3) and the middle portion of the top block (31), and the elastic member (6) pushes the top block (31).

10. The folding mechanism with a secondary self-locking structure according to claim 9, characterized in that: The elastic member (6) is a compression spring or a spring sheet. When the elastic member (6) is a spring sheet, the upper end of the spring sheet is fixed to the trigger (3) or the top block (31), and the lower end of the spring sheet is bent and abuts against the middle of the top block (31).

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