CN215883937U - Folding mechanism and folding car with secondary protect function - Google Patents

Abstract

The utility model provides a folding mechanism with a secondary protection function and a folding vehicle. Wherein, folding mechanism includes: a first structural member; a second structural member; the folding wrench is provided with a retracting position, a safety position and an unlocking position along the rotation direction; the safety structure is slidably arranged on the folding wrench; the safety structure is provided with a first stop structure, and a second structural part or a first structural part where the folding wrench is located is provided with a second stop structure; when the folding wrench rotates from the retracting position to the safety position, the second structural member and the first structural member are kept in a locking state, and the first stop structure abuts against the second stop structure; the safety structure can slide under the driving force and at least drive the first stopping structure to slide towards the direction far away from the second stopping structure so as to cross the second stopping structure to remove the blocking force; in the unlocked position, the second structural member is in an unlocked state with the first structural member. The folding mechanism solves the problem of low safety of the folding mechanism in the prior art.

Description

Folding mechanism and folding car with secondary protect function

Technical Field

The utility model relates to the technical field of folding vehicles, in particular to a folding mechanism with a secondary protection function and a folding vehicle.

Background

At present, folding bicycle, folding scooter etc. possess folding or can separate the folding mechanism who adopts on the equipment instrument of dismantlement function is provided with two hasps and a spanner usually, rotation through the spanner realizes lock and separation between two hasps, and to the rotation of spanner, it can be with the hasp unblock to directly rotate the spanner generally, this kind of mode of setting is convenient, but because one step of when unblock targets in place, therefore its security is lower, it is difficult to take place the maloperation or ride in-process accident not hard up and unblock easily, thereby lead to the condition of incident.

Accordingly, there is a need for improvements in the art that overcome the deficiencies in the prior art.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a folding mechanism with a secondary protection function and a folding vehicle, and aims to solve the problem that the folding mechanism in the prior art is low in safety.

In order to achieve the above object, according to one aspect of the present invention, there is provided a folding mechanism having a secondary protection function, including: a first structural member; the second structural part is movably connected or detachably connected with the first structural part; the second structural part and the first structural part can be switched between a relatively fixed locking state and a relatively movable unlocking state; the folding wrench is rotatably connected with the second structural member or the first structural member and is provided with a retracting position, a safety position and an unlocking position along the rotating direction; the safety structure is slidably arranged on the folding wrench; the safety structure is provided with a first stop structure, and a second structural part or a first structural part where the folding wrench is located is provided with a second stop structure; when the folding wrench rotates from the retracting position to the safety position, the second structural member and the first structural member are kept in a locking state, the first stopping structure abuts against the second stopping structure, and stopping force for continuing rotating towards the unlocking position direction is generated for the folding wrench; the safety structure can slide under the driving force and at least drive the first stopping structure to slide towards the direction far away from the second stopping structure so as to cross the second stopping structure to remove the blocking force; in the unlocked position, the second structural member is in an unlocked state with the first structural member.

Optionally, the first stop structure is a protrusion provided on the safety structure; the second stopping structure is a stopping step arranged on the second structural member or the first structural member, and the stopping step is positioned on a rotating path of the extending part from the retracting position to the safety position; in the safety position, the end part of the extension part abuts against the stopping step and receives the blocking force acted by the stopping step; and the protruding part can slide towards the end far away from the stopping step along with the safety structure so as to pass the end of the stopping step to release the blocking force.

Optionally, the second structural member includes a side ear on which the folding wrench is rotatably disposed, and a stop step is formed at an outer circumferential edge of the side ear.

Optionally, a first arc section and a second arc section are formed at the peripheral edge of the side lug, the distance from the first arc section to the rotation axis of the folding wrench is smaller than the distance from the second arc section to the rotation axis of the folding wrench, and a stop step is formed between the first arc section and the second arc section; between the retracting position and the safety position, the extending part is abutted against the first arc section; in the safety position, the extension part is abutted against the stop step; between the safety position and the unlocking position, the projection abuts against the second arc segment.

Optionally, the safety structure is further provided with a clamping piece; the clamping piece is fixedly connected with the first stop structure; in the retraction position, the clamping piece is clamped with the first structural piece and/or the second structural piece so as to keep the first structural piece and the second structural piece in a locking state; and when the safety structure slides under the driving force, the clamping piece can be forced to be separated from the corresponding structural piece.

Optionally, the safety structure is further provided with an outer buckle, the outer buckle is connected with the clamping piece, and the outer buckle and the clamping piece are distributed on the outer side and the inner side of the folding wrench; the first stop structure is fixed on the outer buckle and connected with the clamping piece; the safety structure is connected with the folding wrench in a sliding way through the external buckle.

Optionally, a communication port extending along the sliding direction of the safety structure is arranged on the folding wrench; the inner side wall of the outer buckle is provided with a connecting convex column which passes through the communicating port and is fixedly connected with the clamping piece; the outer buckle is slidably arranged on the communicating opening through the connecting convex column.

Optionally, the safety structure further comprises a safety reset piece, the safety reset piece is arranged between the folding wrench and the safety structure and provides a reset force tending to keep clamping with the first structural component or the second structural component for the clamping piece; the first stop structure is subjected to a resetting force and tends to be kept in abutting joint with the second stop structure.

Optionally, the first structural member has a first fastening seat, and the second structural member includes: a second buckling seat; the second lock catch is movably connected with the second buckling seat; in the locking state, the second lock catch is locked with the first buckling seat; in the unlocking state, the second lock catch is separated from the first lock catch seat; the second lock catch is provided with a locking groove, and at least one part of the clamping piece extends into the locking groove at the retracting position so that the second lock catch and the first buckling seat are kept in a locking state.

According to another aspect of the present invention, there is also provided a folding cart, comprising: a vehicle body; the above folding mechanism; the folding mechanism comprises a folding mechanism body, a first structural member, a second structural member, a first connecting member, a second connecting member and a first connecting member, wherein the first structural member and the second structural member of the folding mechanism are respectively arranged on different vehicle body structural members of the vehicle body; or the first structural member and the second structural member of the folding mechanism are different vehicle body structural members of the vehicle body respectively.

Compared with the prior art, the utility model has the following beneficial effects: the folding mechanism is not in place in one step but is provided with a safety position when unlocked, and can be unlocked only after being confirmed again, so that secondary protection is formed, the risk of unlocking due to misoperation or accidental loosening caused by in-place in one step is avoided, the safety of the folding mechanism is ensured, and safety accidents are avoided.

Drawings

FIG. 1 shows a schematic structural view of the folding mechanism of the present invention;

FIG. 2 shows a schematic structural view of a first structural member of the present invention;

FIG. 3 shows a schematic structural view of a second structural member and folding wrench of the present invention;

FIG. 4 shows a schematic of the safety feature and folding wrench of the present invention;

FIG. 5 is a schematic view of the folding mechanism of the present invention with the folding wrench in the stowed position;

FIG. 6 is a schematic view of the folding mechanism of the present invention with the folding wrench rotated to the secure position;

fig. 7 shows a schematic view of the folding mechanism of the present invention with the folding wrench rotated to the unlocked position.

Wherein the figures include the following reference numerals:

10. a first structural member; 11. a first buckling seat; 12. a first lock catch; 20. a second structural member; 21. a second stop structure; 22. a lateral ear; 221. a first arc segment; 222. a second arc segment; 23. a second buckling seat; 24. a second lock catch; 241. a locking groove; 25. buckling the reset piece; 30. folding the wrench; 40. a safety structure; 41. a first stop structure; 42. a clamping piece; 43. externally buckling; 50. a safety reset member; 60. a rotating shaft; 70. a pivot shaft.

Detailed Description

The utility model will be described in detail hereinafter with reference to the accompanying drawings in conjunction with embodiments. It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.

It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order.

In the present invention, unless specified to the contrary, use of the terms of orientation such as "upper, lower, top, bottom" or the like, generally refer to the orientation as shown in the drawings, or to the component itself in a vertical, perpendicular, or gravitational orientation; likewise, for ease of understanding and description, "inner and outer" refer to the inner and outer relative to the profile of the components themselves, but the above directional words are not intended to limit the utility model.

The utility model provides a folding mechanism with a secondary protection function and a folding vehicle, aiming at solving the problem that the safety of the folding mechanism in the prior art is low.

A folding mechanism with a secondary protection function as shown in fig. 1 to 7 includes a first structural member 10, a second structural member 20, a folding wrench 30 and a safety structure 40. Wherein, the second structural member 20 is movably connected or detachably connected with the first structural member 10; the second structural component 20 and the first structural component 10 can be switched between a relatively fixed locking state and a relatively movable unlocking state; the folding wrench 30 is rotatably connected with the second structural member 20 or the first structural member 10, and the folding wrench 30 has a retracting position, a safety position and an unlocking position along the rotating direction; the safety structure 40 is slidably arranged on the folding wrench 30; the securing structure 40 has a first stop structure 41, and the second structural member 20 or the first structural member 10 where the folding wrench 30 is located has a second stop structure 21; when the folding wrench 30 rotates from the retracted position to the safety position, the second structural member 20 and the first structural member 10 are kept in the locked state, the first stop structure 41 abuts against the second stop structure 21, and a blocking force for continuing to rotate towards the unlocking position is generated for the folding wrench 30; the safety structure 40 can be driven to slide, and at least drives the first stopping structure 41 to slide towards the direction far away from the second stopping structure 21 so as to cross the second stopping structure 21 to release the blocking force; in the unlocked position, the second structural member 20 is in an unlocked state with the first structural member 10.

In the embodiment, the safety position is set during the rotation of the folding wrench 30, and the first stopping structure 41 and the second stopping structure 21 are respectively set on the safety structure 40 and the second structural member 20, so that, during the unlocking of the folding mechanism, when the folding wrench 30 rotates to the safety position, the first stopping structure 41 abuts against the second stopping structure 21, so as to stop the folding wrench 30 at the safety position, so that the folding wrench 30 cannot rotate continuously, and during the rotation of the folding wrench 30 from the retracted position to the safety position, the first structural member 10 and the second structural member 20 still keep a locked state of abutting and locking, and the two members cannot be unlocked and separated; if it is determined that the unlocking is not performed by mistake but is actually required, the operator operates the safety structure 40 to slide, the sliding of the safety structure 40 enables the first stopping structure 41 to exit the second stopping structure 21, the first stopping structure and the second stopping structure are not stopped with each other, at this time, the folding wrench 30 can continue to rotate, and the folding wrench 30 can drive to toggle the second structural member 20 or the first structural member 10 in the process of rotating from the safety position to the unlocking position, so that the first structural member 10 and the second structural member 20 are switched to the unlocking state with separated unlocking. The arrangement mode enables the folding mechanism not to be in place in one step but to be provided with the safety position, and the folding mechanism can be unlocked only after being confirmed again, so that secondary protection is formed, the risk of unlocking due to misoperation or accidental looseness caused by in-place in one step is avoided, the safety of the folding mechanism is guaranteed, and safety accidents are avoided.

During the rotation of the folding wrench 30 of the present embodiment, when the folding wrench 30 rotates between the retracted position and the safety position, the first structure 10 and the second structure 20 are locked, and the first stopping structure 41 and the second stopping structure 21 are not in contact; when the first stopping structure 41 and the second stopping structure 21 are stopped, the folding wrench 30 continues to rotate from the safety position to the unlocking position, and the folding wrench 30 drives the second structural member 20 or the first structural member 10 to unlock the first structural member 10 and the second structural member 20. The embodiment adopts the folding wrench 30 to achieve the effect of driving the second structural member 20 to move by squeezing the second structural member 20. Of course, other methods such as pulling may be adopted, or the folding wrench 30 may cooperate with the first structural member 10 to move the first structural member 10.

In the present embodiment, the folding mechanism is applied to a vehicle having a folding function, such as a folding bicycle, a folding scooter, etc., for example, besides, the folding mechanism can also be applied to other scenes that two components are required to be openable and closable and detachably connected according to needs.

It should be noted that the stopping effect between the first stopping structure 41 and the second stopping structure 21 of the present embodiment is unidirectional, that is, only when the folding wrench 30 rotates from the retracted position to the unlocked position, the stopping effect between the first stopping structure 41 and the second stopping structure 21 is generated, and when the folding wrench 30 is reset, that is, when the folding wrench 30 rotates from the unlocked position to the retracted position, the first stopping structure 41 can smoothly pass through the second stopping structure 21 without being stopped by the second stopping structure 21. Of course, a two-way stop may also be used.

As shown in fig. 1, one side of the first structure 10 and one side of the second structure 20 are pivotally connected by a pivot shaft 70, and the first structure 10 and the second structure 20 can be opened by rotating apart or can be rotated close to each other to be butted, the side of the first structure 10 and the second structure 20 where the pivot shaft 70 is provided forms a pivot side, and the folding wrench 30 is arranged on the opposite side opposite to the pivot side, so that the folding wrench 30 can control the state of the butt joint separation between the first structure 10 and the second structure 20 by locking and unlocking the opposite side.

Besides the above-mentioned pivot connection, the first structural member 10 and the second structural member 20 may be directly configured as two completely separable components, and when the two are butted, the two are locked at a plurality of circumferential positions by a plurality of folding wrenches 30 or a combination of the folding wrenches 30 and other locking structures, so as to achieve reliable connection.

As shown in fig. 3 and 5, the first stopping structure 41 of the present embodiment is a protruding portion disposed on the safety structure 40, the second stopping structure 21 is a stopping step disposed on the second structural member 20, and the protruding portion is engaged with or disengaged from the stopping step, and the stopping step is located on a rotation path of the protruding portion from the retracted position toward the safety position, specifically, in the safety position, an end portion of the protruding portion abuts against the stopping step to receive a stopping force applied from the stopping step; and the protrusion can slide with the securing structure 40 toward the end away from the stopping step to pass the end of the stopping step to release the blocking force, thereby achieving the purpose that the folding wrench 30 is stopped or stopped at the securing position. Of course, the second stop structure 21 may also be disposed on the first structural component 10, and besides the matching manner of the step stop matching, it may also be disposed to match other structural forms such as a protrusion and a groove.

As shown in fig. 3, the second structural member 20 of the present embodiment includes a side ear 22, a through hole is opened on the side ear 22, and correspondingly, a through hole is opened on the folding wrench 30, and the rotating shaft 60 is inserted into the through holes of the side ear 22 and the folding wrench 30, so as to rotatably dispose the folding wrench 30 on the side ear 22. In the present embodiment, a stop step is formed at the outer peripheral edge of the side ear 22 as the second stop structure 21, and the protruding portion of the safety structure 40 can abut against the outer peripheral edge of the side ear 22, so as to be matched with the stop step. Of course, the stop step can be disposed on the side ear 22, or can be disposed at other positions of the second structural member 20, and only need to be able to cooperate with the protruding portion to realize the stop. Alternatively, the side lug 22 can also be arranged on the first structural part 10.

As shown in fig. 5, in the present embodiment, a first arc 221 and a second arc 222 are formed at the outer circumferential edge of the side lug 22, and the distance from the first arc 221 to the rotation axis of the folding wrench 30 is smaller than the distance from the second arc 222 to the rotation axis of the folding wrench 30, so that a fall is naturally formed between the first arc 221 and the second arc 222, thereby forming a stopping step between the first arc 221 and the second arc 222. When the folding wrench 30 rotates between the retracted position and the safety position, the first stopping structure 41 is located on the first arc 221, the protruding portion abuts against the first arc 221, no stopping occurs between the first stopping structure 41 and the second stopping structure 21, and the folding wrench 30 can rotate freely between the retracted position and the safety position; when the folding wrench 30 rotates to the safety position, the first stopping structure 41 naturally abuts against the stopping step, i.e. the protruding portion abuts against the stopping step; when the folding wrench 30 is rotated between the secured position and the unlocked position, the first stop structure 41 passes over the first arc 221, and the protrusion abuts against the second arc 222, moving freely on the second arc 222. When the folding wrench 30 is rotated in the reverse direction from the unlocking position to the stowage position, the first stopper structure 41 naturally goes over the stopper step without being stopped. The protruding portion of the present embodiment is as close as possible to and abuts on the first arc section 221 and the second arc section 222, so as to ensure that the protruding portion can stably abut on the stopping step when the folding wrench 30 rotates, thereby ensuring the stopping effect.

As shown in fig. 2, the first structural member 10 of the present embodiment includes a first fastening seat 11, a first locking device 12 is fixedly mounted on the first fastening seat 11 through a screw, a gasket, and the like, the first locking device 12 is located on an opposite side of the first structural member 10 away from the pivot axis 70, and the first locking device 12 forms a hook structure. Accordingly, as shown in fig. 3, the second structural member 20 includes a second fastener seat 23 and a second fastener 24, the second fastener seat 23 is similar to the first fastener seat 11, and is pivotally connected to the first fastener seat by a pivot shaft 70, the side ear 22 is disposed on the second fastener seat 23, the first fastener 12 is similar to the second fastener 24, and the second fastener 24 also has a hook structure and is also mounted on the opposite side of the second fastener seat 23 away from the pivot shaft 70. The difference is that the second fastener 23 of the second structural member 20 is movably connected to the second fastener 24, and the second fastener 24 can rotate relative to the second fastener 23, so as to be locked to or separated from the first fastener 12 of the first fastener 11, thereby achieving the connection and separation between the first structural member 10 and the second structural member 20. In the locking state, the second lock catch 24 is locked with the first buckling seat 11; in the unlocked state, the second locking device 24 is separated from the first fastener 11. When the folding wrench 30 rotates from the safe position to the unlock position, the folding wrench 30 just presses the second lock catch 24 to separate the second lock catch 24 from the first lock catch 12, so as to unlock the lock. Of course, the specific structures of the first structural member 10 and the second structural member 20 may also be changed as required, for example, a groove is directly formed on the first fastening seat 11 to perform the fastening function of the first fastener 12, or the first fastener 12 is movably disposed, and the folding wrench 30 extrudes the first fastener 12 to perform the fastening and separation, so long as the locking and docking functions are performed.

In the embodiment, the second locking device 24 has a non-circular hole, and accordingly, the rotating shaft 60 connecting the second locking seat 23 and the second locking device 24 is not a circular cylinder. Specifically, the rotating shaft 60 has a first segment and a second segment in the axial direction, wherein there are two second segments, and one second segment is located on each side of the first segment, and the axis of the first segment is parallel to and non-collinear with the axis of the second segment. The through hole provided on the folding wrench 30 and the through hole provided on the side ear 22 of the second fastening seat 23 are circular holes, the rotating shaft 60 is inserted into the non-circular hole of the second locking buckle 24, the through hole of the folding wrench 30 and the through hole of the side ear 22 of the second fastening seat 23, and rotates synchronously with the folding wrench 30, and the rotating shaft 60 can be provided with a flat pad, a screw and the like as required. The non-circular hole is located on the first segment, the through hole of the folding wrench 30 and the through hole of the second fastener seat 23 are located on the second segment, and when the folding wrench 30 rotates, the second locking device 24 has axial movement relative to the second fastener seat 23 in addition to rotation, i.e. in fig. 5, rotates upward and rotates leftward, so as to be separated from the first locking device 12. Thus, when the folding wrench 30 is rotated between the stowed position and the secured position, neither the folding wrench 30 nor the first segment compresses the second catch 24, and the second catch 24 remains snap-locked with the first catch 12; when the folding wrench 30 is rotated at the securing position and the unlocking position, the folding wrench 30 rotates to rotate the rotating shaft 60 and press the second locker 24, so that the second locker 24 is moved and rotated to be separated from the first locker 12 of the first structural member 10.

The second structure 20 of this embodiment still includes the lock piece 25 that resets, the lock piece 25 that resets adopts the torsional spring, its one end and the butt of second lock seat 23, the other end and the butt of second hasp 24 to for second hasp 24 provides slide to the power that resets with the locking of first hasp 12 lock, like this, when folding spanner 30 resets to the rotation of packing up the position, folding spanner 30, pivot 60 do not all extrude second hasp 24 again, second hasp 24 can reset automatically under the effect that the lock resets piece 25.

In addition to the locking protection formed by the first locking device 12 of the first structural member 10 and the second locking device 24 of the second structural member 20, the safety structure 40 also serves as a locking protection. Specifically, as shown in fig. 3 to 5, the safety structure 40 has a clip member 42, the clip member 42 is fixedly connected to the first stopping structure 41, and the clip member 42 is located inside the folding wrench 30, that is, when the folding wrench 30 is in the retracted position, the clip member 42 is closer to the second lock catch 24 than the outer surface of the folding wrench 30. Have seted up locking groove 241 on second hasp 24, locking groove 241 cooperates with joint piece 42, when folding spanner 30 rotates to the packing up position, at least some of joint piece 42 can stretch into and the joint is in locking groove 241, thereby with second structure 20 joint, make second hasp 24 unable random slip, guarantee to keep at the locking state between the first hasp 12 on second hasp 24 and the first lock base 11, and then guarantee the locking effect between first structural component 10 and the second structural component 20, cooperation second hasp 24 and the locking between the first hasp 12 realize duplicate protection. When the lock is unlocked, the safety structure 40 is slid by an external driving force, so that the clamping member 42 is forced to separate from the corresponding second structural member 20. Of course, except for the manner of matching the clamping member 42 with the second latch 24, the clamping member 42 may also be used to match the first latch 12 of the first structural member 10, at this time, the first latch 12 may be movably disposed, and the clamping member 42 limits the first latch 12 to realize the effect of stable locking between the second latch 24 and the first latch 12.

In this embodiment, the securing structure 40 further includes an outer buckle 43, the outer buckle 43 is slidably connected to the folding wrench 30 and is located on the outer side of the folding wrench 30, i.e. the outer buckle 43 and the fastening member 42 are located on the inner and outer opposite outer sides and inner side of the folding wrench 30, respectively. Detain 43 outward and include main part and cooperation portion, the connection projection has in the middle of the inside wall of main part, be equipped with the intercommunication mouth that extends along insurance structure 40 slip direction on the folding spanner 30, it passes the intercommunication mouth to connect the projection, and pass through part fixed connection such as screw with joint spare 42, thereby both realize that outer knot 43 is connected with joint spare 42 and establishes on the intercommunication mouth through connecting projection slidable, folding spanner 30 rotates and to drive outer knot 43, joint spare 42 rotates in step, insurance structure 40 has been realized again through outer knot 43 and folding spanner 30 sliding connection. The cooperation portion extends and is rectangular form, and its one end is connected with the main part, and the other end extends to the surface of side ear 22, and the one end that the cooperation portion is close to side ear 22 is as first backstop structure 41 promptly, also is the extension for first backstop structure 41 is connected with joint piece 42 through fixing on outer knot 43. Be provided with the operation structure who is used for the operation on the main part, operation structure can adopt protruding roof beam etc. and operating personnel can drive insurance structure 40 through operation structure along folding spanner 30's length direction, also be exactly folding spanner 30 axis of rotation's radial slip, realizes the cooperation of joint spare 42 and locking groove 241 on the one hand, and on the other hand realizes the cooperation of extension and backstop step. Two engaging portions are provided, and one engaging portion is provided on each of opposite sides of the folding wrench 30 so as to engage with the two side ears 22.

In this embodiment, the folding mechanism further includes an insurance resetting piece 50, the insurance resetting piece 50 is a spring, the insurance resetting piece 50 is disposed between the folding wrench 30 and the insurance structure 40, one end of the insurance resetting piece is abutted to the clip piece 42 or the outer buckle 43 of the insurance structure 40, and the other end of the insurance resetting piece is abutted to the folding wrench 30, the insurance resetting piece 50 has two functions, on one hand, the insurance resetting piece 50 provides a resetting force for the clip piece 42 to extend into the locking groove 241, so that the clip piece 42 tends to be clipped with the first structural component 10 or the second structural component 20, and when the folding wrench 30 is reset and rotated to the retracted position, the clip piece 42 automatically extends into and is held in the locking groove 241 under the action of the insurance resetting piece 50, thereby avoiding the situation of accidental unlocking; on the other hand, the first stopping structure 41 tends to keep abutting with the first arc section 221 and the second arc section 222 of the second stopping structure 21 due to the resetting force of the safety resetting piece 50, so that the protruding part can stably abut against the stopping step when the folding wrench 30 rotates, and the stopping effect is ensured.

The folding mechanism of this embodiment is used as follows:

initially, the folding mechanism is in a locked state, and referring to fig. 5, the snap-in element 42 is kept extending into the locking groove 241 by the safety-restoring element 50, so that the folding wrench 30 is locked and cannot rotate, and the second lock catch 24 is locked with the first lock catch 12, so as to lock the first structural element 10 and the second structural element 20 together. Meanwhile, the protruding portion, i.e., the first stopping structure 41, is located on the first arc section 221, and a certain distance is circumferentially arranged between the protruding portion and the second stopping structure 21, so that the protruding portion and the second stopping structure 21 are not in contact with each other, and the second stopping structure 21 does not affect the rotation of the first stopping structure 41.

Referring to the opening process schematic diagrams shown in the sequence of fig. 5 to 7, an operator slightly pulls the outer buckle 43 upward along an arrow (i), the outer buckle 43 drives the safety structure 40 to integrally slide upward for a certain distance, so that the clamping member 42 is separated from the locking groove 241, meanwhile, the operator rotates the folding wrench 30 downward (i.e., counterclockwise in fig. 5) along the arrow (ii) direction to an unlocking position to open, then the operator can release the safety structure 40, the safety structure 40 slides in a reverse direction under the action of the safety resetting member 50, so that the first stopping structure 41 abuts against the first arc section 221, and rotates gradually to a position close to the second stopping structure 21 along with the rotation of the folding wrench 30. When the folding wrench 30 rotates to the safety position, the first stopping structure 41 abuts against the stopping step at the second stopping structure 21, and due to the stopping of the second stopping structure 21, the safety structure 40 cannot rotate continuously as a whole, that is, the folding wrench 30 cannot rotate continuously, and the folding wrench 30 is kept at the safety position. In the process, the rotation of the folding wrench 30 does not drive the second lock catch 24 to rotate, so that the second lock catch 24 and the first lock catch 12 are locked, the first structural member 10 and the second structural member 20 are locked, and the folding wrench 30 is always kept at the safety position and cannot continuously rotate to the unlocking position under the condition that an operator does not further operate, so that the condition of misoperation or accidental unlocking is prevented. When it is determined that the unlocking is required, the operator slightly pulls the outer buckle 43 downwards (i.e. outwards) again in the direction of the arrow (c), at this time, the first stopping structure 41 is separated from the second stopping structure 21, the second stopping structure 21 no longer stops the first stopping structure 41, the operator simultaneously rotates the folding wrench 30 counterclockwise in the direction of the arrow (c) to open, the first stopping structure 41 can pass over the second stopping structure 21 to enter the second arc 222, the folding wrench 30 can pass over the safety position to rotate to the unlocking position, after the folding wrench 30 passes over the safety position, during the rotation of the folding wrench 30, the folding wrench 30 presses the rotating shaft 60, the rotating shaft 60 presses the second lock catch 24, under the action of the rotating shaft 60, the second lock catch 24 will be lifted upwards and rotate around the rotating shaft 60 along with the folding wrench 30 to be separated from the first lock catch 12, the first structural member 10 and the second structural member 20 are converted into the unlocking state, the operator turns the first fastening seat 11 upwards along the arrow (c) direction to open the first and second structural members 10 and 20. To this end, the folding mechanism is fully open.

Referring to the schematic folding process shown in the sequence of fig. 7 to 5, the operator turns the first fastening seat 11 downward along the direction of the arrow (c) to butt the first structural member 10 to the second structural member 20, and at this time, the lower surface of the first structural member 10 contacts the upper surface of the second structural member 20. An operator rotates the folding wrench 30 upwards (i.e. clockwise in fig. 7) in the direction opposite to the arrow (r), the first stopping structure 41 gradually approaches the first arc section 221 along the second arc section 222, during the rotation of the folding wrench 30, the folding wrench 30 gradually reduces the extrusion force on the rotating shaft 60, under the action of the fastening reset piece 25, the second lock catch 24 gradually approaches the first lock catch 12, until the folding wrench 30 rotates to the safety position, the first lock catch 12 is engaged with the second lock catch 24, and at this time, the first lock catch 12 and the second lock catch 24 have a certain moving space but cannot be automatically disengaged, which is a protection; at this time, the first stopping structure 41 moves from the second arc section 222 to the first arc section 221, and since the second stopping structure 21 does not have a stopping effect on the first stopping structure 41, the first stopping structure 41 can easily get over the stopping step and enter the first arc section 221. Then, the folding wrench 30 continues to rotate upwards in the direction opposite to the arrow (r), the folding wrench 30 presses the rotating shaft 60 in the opposite direction, and the second lock catch 24 is forced downwards by the rotating shaft 60 to engage with the first lock catch 12, so that the first structural member 10 and the second structural member 20 are locked again, and the first stopping structure 41 still rotates on the first arc section 221. The folding wrench 30 continues to rotate upwards in the reverse direction of the arrow (r) and the reverse direction of the arrow (r) until the folding wrench 30 rotates to the retracted position again, at this time, the clamping piece 42 is aligned with the locking groove 241 again, the clamping piece 42 slides downwards in the reverse direction of the arrow (r) under the action of the safety resetting piece 50 and extends into the locking groove 241, the clamping piece 42 is clamped with the locking groove 241, and the folding wrench 30 is locked in the retracted position, which is secondary protection. At this point, the folding mechanism is fully closed.

The embodiment also provides a folding vehicle, which comprises a vehicle body and the folding mechanism, wherein the first structural member 10 and the second structural member 20 of the folding mechanism are respectively installed on different vehicle body structural members of the vehicle body; or the first structural member 10 and the second structural member 20 of the folding mechanism are respectively different vehicle body structural members of the vehicle body.

From the above description, it can be seen that the above-described embodiments of the present invention achieve the following technical effects:

1. the problem of low safety of the folding mechanism in the prior art is solved;

2. the folding mechanism is not in place in one step during unlocking, but forms a safety position, and can be unlocked only after being confirmed again, so that the risk of unlocking due to misoperation or accidental loosening caused by in-place in one step is avoided, the safety of the folding mechanism is ensured, and safety accidents are avoided.

It is to be understood that the above-described embodiments are only a few, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular is intended to include the plural unless the context clearly dictates otherwise, and it should be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of features, steps, operations, devices, components, and/or combinations thereof.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A folding mechanism with secondary protection function, characterized by comprising:

a first structural member (10);

a second structural member (20) movably or detachably connected to the first structural member (10); the second structural part (20) and the first structural part (10) can be switched between a relatively fixed locking state and a relatively movable unlocking state;

a folding wrench (30) rotatably connected to the second structural member (20) or the first structural member (10), the folding wrench (30) having a stowed position, a securing position and an unlocking position in a direction of rotation thereof;

a securing structure (40) slidably disposed on the folding wrench (30); the safety structure (40) is provided with a first stop structure (41), and the second structural part (20) where the folding wrench (30) is located or the first structural part (10) is provided with a second stop structure (21);

when the folding wrench (30) rotates from the storage position to the safety position, the second structural member (20) and the first structural member (10) are kept in the locking state, the first stop structure (41) abuts against the second stop structure (21), and a blocking force for continuing to rotate towards the unlocking position is generated on the folding wrench (30); the safety structure (40) can slide under the driving force, at least the first stopping structure (41) is driven to slide towards the direction far away from the second stopping structure (21) so as to overcome the second stopping structure (21) to release the blocking force;

in the unlocked position, the second structural part (20) is in the unlocked state with the first structural part (10).

2. The folding mechanism of claim 1, characterized in that said first stop structure (41) is a projection provided on said safety structure (40);

the second stop structure (21) is a stop step provided on the second structural part (20) or the first structural part (10), and the stop step is located on a rotation path of the protruding part from the retracted position to the safety position;

in the safety position, the end part of the protruding part abuts against the stop step and receives a blocking force acted by the stop step; and the projection is slidable with the safety structure (40) towards the end remote from the stop step to pass the end of the stop step to release the blocking force.

3. The folding mechanism of claim 2, characterized in that the second structural part (20) comprises a side ear (22), the folding wrench (30) being rotatably arranged on the side ear (22), the stop step being formed at a peripheral edge of the side ear (22).

4. The folding mechanism according to claim 3, characterized in that a first arc (221) and a second arc (222) are formed at the peripheral edge of the side ear (22), and the distance from the first arc (221) to the rotation axis of the folding wrench (30) is smaller than the distance from the second arc (222) to the rotation axis of the folding wrench (30), the stop step being formed between the first arc (221) and the second arc (222);

between the stowed position and the safety position, the projection abuts against the first arc segment (221);

in the safety position, the protruding part abuts against the stop step;

between the secured position and the unlocked position, the projection abuts against the second arc segment (222).

5. The folding mechanism of any of claims 1 to 4, characterized in that the safety structure (40) further has a snap-in piece (42); the clamping piece (42) is fixedly connected with the first stop structure (41);

in the stowed position, the snap-in element (42) snaps into engagement with the first structural element (10) and/or the second structural element (20) to retain the first structural element (10) and the second structural element (20) in the locked state; and when the safety structure (40) is driven to slide by a driving force, the clamping piece (42) can be forced to be separated from the corresponding structural piece.

6. The folding mechanism according to claim 5, characterized in that said securing structure (40) further has an external buckle (43), said external buckle (43) being connected to said snap-in element (42), both distributed on the outside and on the inside of said folding wrench (30);

the first stopping structure (41) is connected with the clamping piece (42) by being fixed on the outer buckle (43);

the safety structure (40) is connected with the folding wrench (30) in a sliding mode through the outer buckle (43).

7. The folding mechanism according to claim 6, characterized in that said folding wrench (30) is provided with a communication opening extending in the sliding direction of said safety structure (40);

a connecting convex column is arranged on the inner side wall of the outer buckle (43), and the connecting convex column penetrates through the communication port to be fixedly connected with the clamping piece (42);

the outer buckle (43) is slidably arranged on the communication opening through the connecting convex column.

8. The folding mechanism according to claim 5, characterized in that said safety structure (40) further has a safety return element (50), said safety return element (50) being provided between said folding wrench (30) and said safety structure (40) and providing said snap-in element (42) with a return force tending to keep the snap-in engagement with said first structural element (10) or said second structural element (20);

the first stop structure (41) is intended to remain in abutment with the second stop structure (21) by the return force.

9. The folding mechanism of claim 5, characterized in that said first structural element (10) has a first snap seat (11), said second structural element (20) comprising:

a second fastening seat (23);

the second lock catch (24), the second lock catch (24) is movably connected with the second buckling seat (23);

in the locking state, the second lock catch (24) is locked with the first buckling seat (11); in the unlocking state, the second lock catch (24) is separated from the first buckling seat (11);

the second lock catch (24) is provided with a locking groove (241), and at least one part of the clamping piece (42) extends into the locking groove (241) in the folding position, so that the second lock catch (24) and the first buckling seat (11) are kept in the locking state.

10. A folding cart, comprising:

a vehicle body;

the folding mechanism of any one of claims 1 to 9;

the folding mechanism comprises a first structural member (10) and a second structural member (20) which are respectively arranged on different vehicle body structural members of the vehicle body; or the first structural member (10) and the second structural member (20) of the folding mechanism are different vehicle body structural members of the vehicle body respectively.

Images