CN214029002U

CN214029002U - safety folding mechanism

Info

Publication number: CN214029002U
Application number: CN202022892926.XU
Authority: CN
Inventors: 李清河; 周常海
Original assignee: JD Components Co Ltd
Current assignee: JD Components Co Ltd
Priority date: 2020-12-03
Filing date: 2020-12-03
Publication date: 2021-08-24
Anticipated expiration: 2030-12-03

Abstract

The utility model provides a safety folding mechanism which comprises a joint seat, an upper pipe, a first locking unit and a second locking unit. The first locking unit has a handle pivoted on the joint seat and a locking block connected to the handle, and the second locking unit has a socket fixed on the joint seat and a locking plate pivoted on the socket. When the plates are locked, the joint seat and the upper tube are fixed by the locking block, so that the upper tube cannot be folded. When the handle is unlocked but the locking plate is locked, the locking plate and the locking block interfere with each other, so that the upper tube still cannot be folded. When both the handle and the locking plate are unlocked, the locking plate and the locking block are separated from each other, so that the upper tube can be folded. Therefore, once the first locking unit is unlocked by accidental touch, the accidental pivoting of the upper tube can still be prevented by the second locking unit.

Description

Safety folding mechanism

Technical Field

The present invention relates to a folding mechanism, and more particularly to a folding mechanism with increased safety.

Background

Generally, a scooter is a general scooter, which is equipped with a set of safety folding mechanism, and by operating the safety folding mechanism, a user can unfold and position the handle stem to facilitate riding, and fold the handle stem downward toward the pedal, so as to reduce the volume of the handle stem and achieve the purpose of convenient storage.

The CN 201520378U patent discloses a folding joint, which uses a locking device composed of a handle, an eccentric wheel, a connecting sleeve, a sliding block, a supporting seat and a screw to lock an inner V-shaped clamping block in an outer V-shaped clamping groove of an upper joint and a lower joint, so as to close the upper joint and the lower joint. However, in the above patent documents, the handle is easily accidentally released by the rider or other third person, which may result in the situation where the upper joint and the lower joint are accidentally released, and this may affect the safety of the rider.

The internal locking folding joint disclosed in the CN 203078682U patent utilizes the self-locking lever to limit the lateral movement of the locking slider, when the upper joint and the lower joint are to be opened, the handle is pressed downward to disengage the upper end of the self-locking lever from the self-locking hole of the locking slider, and then the handle is rotated counterclockwise in the direction away from the vertical tube to withdraw the wedge-shaped structure at the front end of the locking slider from the wedge-shaped grooves of the upper joint and the lower joint, thereby releasing the fixed locking of the upper joint and the lower joint. However, in the above patent documents, although the handle can be prevented from being unlocked by mistake by the self-locking lever, the handle needs to be unlocked by releasing the restriction of the self-locking lever at the time of operation, and the operation process is not intuitive.

Disclosure of Invention

The main objective of the present invention is to provide a safe folding mechanism, which can increase the safety of use and realize intuitive operation.

In order to achieve the above objective, the safety folding mechanism of the present invention comprises a joint seat, an upper tube, a first locking unit and a second locking unit. The upper tube is pivoted to the joint seat by the bottom end thereof; the first locking unit is provided with a handle, a transmission shaft and a locking block, the handle is coaxially pivoted on the upper pipe and the joint seat and can move between a first locking position and a first releasing position, the transmission shaft penetrates through the upper pipe and the joint seat along the radial direction of the upper pipe and is connected with the handle at one end of the transmission shaft, so that the transmission shaft can be driven by the handle to move along the radial direction of the upper pipe and can pivot along with the upper pipe relative to the joint seat, the locking block is arranged between the joint seat and the upper pipe and is connected with the transmission shaft, and the locking block can synchronously move along the radial direction of the transmission shaft and pivot relative to the joint seat; the second locking unit is provided with a bearing seat, a locking plate and an elastic piece, the bearing seat is fixedly arranged on the joint seat and is positioned below the locking block, the locking plate is pivoted on the bearing seat and can move between a second locking position and a second releasing position relative to the locking block, and the elastic piece acts on the locking plate and keeps the locking plate at the second locking position.

In view of the above, when the handle is located at the first locking position, the locking block fixes the joint seat and the upper tube together, so that the upper tube cannot pivot relative to the joint seat, when the handle is located at the first releasing position, the locking block is separated from the joint seat and the upper tube, and the locking block and the locking plate located between the second locking positions interfere with each other, so that the upper tube cannot pivot relative to the joint seat, when the handle is located at the first releasing position and the locking plate is located at the second releasing position, the locking block is separated from the joint seat and the upper tube, and the locking block and the locking plate located between the second locking positions are separated from each other, so that the upper tube can pivot and fold relative to the joint seat. In other words, the safety folding mechanism of the present invention, through the configuration of the second locking unit, when the handle is accidentally touched by a rider or another third person to unlock the handle, the locking plate can still prevent the upper tube from being accidentally pivoted, so as to increase the use safety.

Preferably, the locking block has a locking portion at one end thereof, the locking plate has a locking hole, the locking portion of the locking block is inserted into the locking hole of the locking plate to interfere with each other when the handle is in the first release position and the locking plate is in the second release position, and the locking hole of the locking plate and the locking portion of the locking block are separated from each other when the handle is in the first release position and the locking plate is in the second release position.

Preferably, the first locking unit further has a compression spring, the handle has a cam portion, the transmission shaft has a transmission plate and a solenoid, and the locking block has a block body and a bolt. One end of the transmission plate is provided with an annular part, the transmission plate is sleeved on the cam part of the handle through the annular part, the other end of the transmission plate is connected with the solenoid, the bolt is provided with a screw part and a head part connected with the screw part, the screw part is arranged in the block in a penetrating mode and is arranged in the solenoid in a threaded mode, the head part protrudes out of the block to form the locking part, and the compression spring is sleeved on the solenoid of the bolt and abuts against the position between the block and the solenoid. Through the technical characteristics, when the handle is pivoted downwards to the first release position, the handle pushes the transmission plate forwards through the cam part, then the transmission plate pushes the solenoid forwards again, the solenoid pushes the bolt forwards on one hand, and on the other hand, the block is pushed through the compression spring, so that the block is separated from the joint seat and the upper pipe.

Preferably, a first hooking and clamping block is arranged on one side surface of the upper tube, a push button and a second hooking and clamping block are further arranged on the first locking unit, the push button can be arranged on one side surface of the handle in a vertically-movable manner, and the second hooking and clamping block is arranged on the other opposite side surface of the handle and connected with the push button. Therefore, when the push button is not pushed upwards, the second hook block is hooked on the first hook block, so that the handle is kept at the first locking position, and when the push button is pushed upwards, the second hook block is unhooked from the first hook block, so that the handle can move between the first locking position and the first releasing position.

Preferably, the handle and the locking plate are located on two opposite sides of the joint seat.

Preferably, the bottom of this upper tube has an upper caulking groove, the top of this joint seat has a lower caulking groove, this locking block has an upper caulking part and a lower caulking part, when this handle is located this first locking position, the upper caulking part of this locking block and the lower caulking part of this locking block respectively the card locate the upper caulking groove of this upper tube and the lower caulking groove of this joint seat, when this handle is located this first release position, the upper caulking part of this locking block and the lower caulking part of this locking block break away from the upper caulking groove of this upper tube and the lower caulking groove of this joint seat respectively.

The detailed structure, features, assembly or operation of the safety folding mechanism provided by the present invention will be described in the following detailed description of the embodiments. However, those of ordinary skill in the art should understand that the detailed description and specific examples are given for the purpose of illustration only, and are not intended to limit the scope of the invention.

Drawings

Fig. 1 is a perspective view of the safety folding mechanism of the present invention;

fig. 2 is a perspective view of the safety folding mechanism of the present invention at another viewing angle;

fig. 3 is an exploded perspective view of the safety folding mechanism of the present invention;

fig. 4 is a cross-sectional view of the safety folding mechanism of the present invention, mainly showing the handle at the first locking position and the locking plate at the second locking position;

FIG. 5 is similar to FIG. 4, and mainly shows the second hook portion of the second hooking and clamping block unhooking from the first hook portion of the first hooking and clamping block;

FIG. 6 is similar to FIG. 5 and is primarily shown with the handle in a first, unlocked position and the locking plate in a second, locked position;

FIG. 7 is a view similar to FIG. 6, primarily showing the handle in a first released position and the locking plate in a second released position;

FIG. 8 is a view similar to FIG. 7, and shows primarily the upper tube pivoted relative to the joint base;

in the figure: 10. a safe folding mechanism; 20. a joint seat; 22. a lower caulking groove; 24. an inner lug; 30. feeding a pipe; 32. an upper caulking groove; 34. an outer lug; 36. a first hooking and clamping block; 38. a pivot; s1, screws; 40. a first locking unit; 41. a handle; p1, first locked position; p2, first release position; 42. an operation section; 43. a cam portion; 44. a straight groove; 45. a drive shaft; 46. a drive plate; 47. a ring portion; 48. a pin member; 49. a solenoid; 50. a bolt; 51. a screw section; 52. a head portion; 53. a locking block; 54. an upper embedding part; 55. a lower embedding part; 56. a compression spring; 57. a push button; 58. a second hook block; 59. a guide projection; s2, screws; p5, fix position; p6, release position; 60. a second locking unit; 61. a bearing seat; 62. a locking plate; 63. a locking hole; 64. a shaft member; p3, second locked position; p4, second release position; 65. an elastic member; 66. and (3) a block body.

Detailed Description

In the following detailed description, reference will be made to the accompanying drawings that form a part hereof, and in which is shown by way of illustration specific embodiments in which the invention may be practiced. Next, in the embodiments and drawings to be described below, the same reference numerals are used to designate the same or similar components or structural features thereof.

Referring to fig. 1 to 3, the safety folding mechanism 10 of the present invention is suitable for a transportation tool such as a bicycle or a scooter, and includes a joint seat 20, an upper tube 30, a first locking unit 40, and a second locking unit 60.

The joint base 20 is used for assembling with a front fork stem (not shown). The top edge of the front side of the joint seat 20 has two lower caulking grooves 22, and the rear side of the joint seat 20 has two inner lugs 24 opposite to each other.

The top tube 30 is used for assembly with a rider riser (not shown). The bottom end of the front side of the upper tube 30 has two upper caulking grooves 32, and the rear side of the upper tube 30 has two outer lugs 34 opposite to each other. The two outer lugs 34 of the upper tube 30 are pivotally mounted on the two inner lugs 24 of the joint seat 20 via a pivot shaft 38, and two ends of the pivot shaft 38 are respectively locked with a screw S1 to prevent loosening, so that the upper tube 30 can pivot relative to the joint seat 20 about the pivot shaft 38.

The first locking unit 40 has a handle 41, a drive shaft 45, a locking block 53, and a compression spring 56. The handle 41 has an operation portion 42 and two cam portions 43, wherein the operation portion 42 has a straight slot 44, and the cam portions 43 are integrally connected to the left and right side surfaces of the bottom end of the operation portion 42 and are penetrated by the pivot 38, so that the handle 41 can be pivoted up and down relative to the upper tube 30 and the joint seat 20 by taking the pivot 38 as an axis under the action of external force; the transmission shaft 45 is arranged in the joint seat 20 along the radial direction of the upper tube 30, and has two transmission plates 46 and a screw tube 49 which are opposite to each other, the rear end of each transmission plate 46 is provided with a circular ring part 47, each transmission plate 46 is sleeved on the left cam part 43 and the right cam part 43 of the handle 41 by the ring part 47, and the front end of the transmission plate 46 is connected with the rear end of the screw tube 49 by a pin 48; the locking block 53 has a block 66 and a bolt 50, the bolt 50 has a screw part 51 and a head part 52 connected to the screw part 51, the bolt 50 passes through the block 66 with the screw part 51 and is screwed on the front end of the screw tube 49, the head part 52 of the bolt 50 protrudes in front of the block 66 to form a locking part. Furthermore, the top edge of the block 66 has two upper embedding portions 54, the bottom edge of the block 66 has two lower embedding portions 55, the two upper and lower embedding

portions

54, 55 of the block 66 correspond in configuration to the two upper embedding slots 32 of the upper tube 30 and the two lower embedding slots 22 of the joint seat 20, respectively; the compression spring 56 is sleeved on the screw portion 51 of the bolt 50 and abuts between the block 66 and the screw 49 for providing an elastic force to push the block 66 forward.

As described above, when the handle 41 is located at the first locking position P1 shown in fig. 5, the upper and lower

fitting portions

54 and 55 of the block 66 are respectively engaged with the upper fitting groove 32 of the upper tube 30 and the lower fitting groove 22 of the joint seat 20, so that the upper tube 30 and the joint seat 20 are fixed together by the locking block 53, and when the handle 41 is pressed down to the first release position P2 shown in fig. 6 by an external force, the handle 41 pushes the left and right transmission plates 46 forward by the left and right cam portions 43, and then the left and right transmission plates 46 push the screw tube 49 forward, so that the screw tube 49 pushes the bolt 50 forward by the screw relationship with the bolt 50, and pushes the block 66 by the compression spring 56, so that the upper and lower

fitting portions

54 and 55 of the block 66 are separated from the upper fitting groove 32 of the upper tube 30 and the lower fitting groove 22 of the joint seat 20.

On the other hand, as shown in fig. 3, the rear side surface of the upper tube 30 has a first hooking block 36, the first locking unit 40 further has a push button 57 and a second hooking block 58, the push button 57 is located on the left side surface of the operation portion 42 of the handle 41, the second hooking block 58 is located on the right side surface of the operation portion 42 of the handle 41 and is connected to the push button 57 by two screws S2. In addition, the push button 57 is embedded in the straight groove 44 of the handle 41 by a guiding protrusion 59 to increase the smoothness of the operation. Therefore, when the push button 57 is located at the positioning position P5 shown in fig. 4, the second latch 58 is latched to the first latch 36, so that the handle 41 is kept at the first locking position P1, and when the push button 57 is pushed up to the releasing position P6 shown in fig. 5, the second latch 58 is disengaged from the first latch 36, so that the handle 41 can move between the first locking position P1 and the first releasing position P2.

The second locking unit 60 has a holder 61, a locking plate 62 and an elastic member 65. The bearing seat 61 is fixedly arranged on the front side of the joint seat 20 and is positioned below the locking block 53; the lock plate 62 is pivotally provided to the holder 61 by a shaft 64 and is movable between a second lock position P3 shown in fig. 6 and a second release position P4 shown in fig. 7 with respect to the lock block 53, and the lock plate 62 has a lock hole 63 at its tip end, the lock hole 63 of the lock plate 62 corresponding to the head 52 of the bolt 50; the elastic member 65 (a torsion spring for example) is sleeved on the shaft 64 and its two ends respectively abut against the bottom ends of the seat 61 and the locking plate 62, so as to provide an elastic force to keep the locking plate 62 at the second locking position P3 shown in fig. 6.

When the upper tube 30 is to be folded, the second hooking-latch 58 is first pushed up to the release position P6 shown in fig. 5 by the push button 57 to release the restriction on the handle 41, then the handle 41 is pushed down to the first release position P2 shown in fig. 6 to move the block 66 forward to separate the upper and lower embedding

portions

54, 55 from the upper embedding slot 32 of the upper tube 30 and the lower embedding slot 22 of the joint seat 20, and the bolt 50 moves forward along with the block 66, and since the locking plate 62 is held by the elastic member 65 at the second locking position P3 shown in fig. 6, the bolt 50 passes the head 52 into the locking hole 63 of the locking plate 62 after moving forward along with the block 66 to interfere the locking plate 62 and the bolt 50, so that the upper tube 30 cannot pivot relative to the joint seat 20 even if the restriction on the upper tube 30 and the joint seat 20 by the locking block 53 is released. Then, the locking plate 62 is pulled to the second release position P4 shown in fig. 7, so that the locking hole 63 of the locking plate 62 is separated from the head 52 of the bolt 50, and the locking plate 62 and the bolt 50 do not interfere with each other, at this time, the upper tube 30 and the first locking unit 40 can be pivotally folded relative to the joint base 20 (as shown in fig. 8).

To unfold and position the upper tube 30, the upper tube 30 is first pivoted toward the joint seat 20, then the locking plate 62 is pushed to the second release position P4 by the head 52 of the bolt 50 against the force of the elastic member 65 until the head 52 of the bolt 50 corresponds to the locking hole 63 of the locking plate 62, the locking plate 62 is returned to the second locking position P3 by the elastic member 65, then the handle 41 is pushed up to the first locking position P1, on one hand, the head 52 of the bolt 50 is disengaged from the locking hole 63 of the locking plate 62, on the other hand, the block 66 is clamped between the upper tube 30 and the joint seat 20, and finally, the push button 57 is pushed down to the positioning position P5, thus completing the unfolding and positioning of the upper tube 30.

In summary, the safety folding mechanism 10 of the present invention can prevent the upper tube 30 from being accidentally pivoted by the locking plate 62 once the handle 41 is accidentally touched by the rider or other third person to unlock the handle by the configuration of the second locking unit 60, thereby achieving the purpose of increasing the safety of use. In addition, the safety folding mechanism 10 of the present invention unlocks the handle 41 when folding the upper tube 30, and then releases the restriction of the locking plate 62, so that the operation can be intuitive and the convenience of use can be improved.

The above-mentioned embodiments, objects, technical solutions and advantages of the present invention are further described in detail, it should be understood that the above-mentioned embodiments are only examples of the present invention, and are not intended to limit the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims

1. A safety folding mechanism is characterized in that it comprises:

a joint seat;

an upper tube, which is pivoted on the joint seat by the bottom end;

a first locking unit, having a handle, a transmission shaft and a locking block, wherein the handle is coaxially pivoted to the upper tube and the joint seat and can move between a first locking position and a first releasing position, the transmission shaft is radially inserted between the upper tube and the joint seat along the upper tube and is connected with the handle at one end thereof, so that the transmission shaft can be driven by the handle to move radially along the upper tube and can pivot along with the upper tube relative to the joint seat, the locking block is arranged between the joint seat and the upper tube and is connected with the transmission shaft, and the locking block is synchronously radially moved along with the transmission shaft and pivots relative to the joint seat; and

a second locking unit having a bearing seat, a locking plate and an elastic member, wherein the bearing seat is fixedly arranged on the joint seat and is positioned below the locking block, the locking plate is pivoted on the bearing seat and can move between a second locking position and a second releasing position relative to the locking block, and the elastic member acts on the locking plate and keeps the locking plate at the second locking position;

when the handle is located at the first unlocking position and the locking plate is located at the second unlocking position, the locking block is disengaged from the joint seat and the upper tube and disengaged from the locking plate, so that the upper tube cannot pivot relative to the joint seat, and when the handle is located at the first unlocking position and the locking plate is located at the second unlocking position, the upper tube can be folded relative to the joint seat in a pivoting manner.

2. The safety folding mechanism of claim 1, wherein the locking block has a locking portion, the locking plate has a locking hole at a top end thereof, the locking portion of the locking block is inserted into the locking hole of the locking plate when the handle is at the first release position and the locking plate is at the second release position, and the locking hole of the locking plate and the locking portion of the locking block are separated from each other when the handle is at the first release position and the locking plate is at the second release position.

3. The safety folding mechanism of claim 2 wherein the handle has a cam portion, the transmission shaft has a transmission plate and a threaded tube, the locking block has a block and a bolt, the first locking unit further has a compression spring, one end of the transmission plate has a ring portion, the transmission plate is sleeved on the cam portion of the handle by the ring portion, the other end of the transmission plate is connected to the threaded tube, the bolt has a screw portion and a head portion connected to the screw portion, the screw portion is inserted through the block and threaded into the threaded tube, the head portion protrudes from the block to form the locking portion, and the compression spring is sleeved on the screw portion of the bolt and abuts between the block and the threaded tube.

4. The safety folding mechanism of claim 3 wherein the upper tube has an upper slot, the joint seat has a lower slot, the block has an upper slot and a lower slot, the upper slot and the lower slot of the block are respectively engaged with the upper slot and the lower slot of the joint seat when the handle is at the first locking position, and the upper slot and the lower slot of the block are respectively disengaged from the upper slot and the lower slot of the upper tube and the lower slot of the joint seat when the handle is at the first releasing position.

5. The mechanism of claim 1, wherein a first hooking block is disposed on a side of the upper tube, the first locking unit further comprises a push button and a second hooking block, the push button is disposed on a side of the handle in a vertically movable manner, the second hooking block is disposed on the other opposite side of the handle and connected to the push button, when the push button is at a position, the second hooking block hooks the first hooking block to keep the handle at the first locking position, and when the push button is at a release position, the second hooking block hooks the first hooking block to move the handle between the first locking position and the first release position.

6. The secure folding mechanism of claim 1, wherein the handle and the locking plate are located on two opposite sides of the joint base.