Anti-mis-touch release device and stroller

Abstract

The utility model discloses a kind of anti-misoperation release lock device and cart, including first traction, guide sleeve, sliding sleeve, pin and unlocking drive block, through hole is axially equipped in guide sleeve, guide sleeve opposite side is provided with guide hole;Guide hole includes first section and second section, first section is inclined to the center axis of guide sleeve;Sliding sleeve is axially slidably arranged in through hole;Sliding sleeve is equipped with sliding hole extending along the radial direction of guide sleeve, pin is slidably arranged in sliding sleeve;The upper end of pin is equipped with shaft pin relative to both sides, shaft pin extends outside sliding sleeve and extends into the guide hole of guide sleeve;Unlocking drive block is equipped with card hole in one end;One end of first traction is connected with sliding sleeve, to drive pin along the first section of guide hole to second section, and make the other end of pin into card hole, to further drive unlocking drive block sliding.The utility model can prevent accidental folding of cart due to misoperation switch, greatly improve the security of use.

Description

Technical Field

[0001] This utility model relates to a trolley, and more particularly to an anti-accidental release device and a trolley. Background Technology

[0002] Baby carriers have become indispensable products in the growth of infants and toddlers. Currently, existing strollers typically fold the frame by pressing an operating switch located on the handlebar. This switch, along with a traction cable, actuates a locking mechanism located at the frame joint, disengaging the locking mechanism from its locking hole and unlocking the entire frame, allowing the stroller to fold relative to the legs. However, because the operating switch is located on the handlebar armrest, users can easily touch it, potentially causing accidental disengagement of the locking mechanism and unintentionally unlocking and folding the stroller, posing a safety hazard. Utility Model Content

[0003] The purpose of this invention is to provide an anti-accidental release device, which can prevent the cart from being accidentally closed due to accidental operation of the switch, thus greatly improving the safety of use.

[0004] Another objective of this invention is to provide a trolley that has a function to prevent accidental closure due to accidental operation of the switch, thus ensuring high safety during use.

[0005] To achieve the above objectives, this utility model provides an anti-accidental release device, comprising a first traction member, a guide sleeve, a sliding sleeve, a locking pin, and an unlocking drive block. The guide sleeve has an axially oriented through hole, and guide holes are formed on opposite sides of the guide sleeve. Each guide hole includes a first section and a second section communicating with the lower end of the first section. The first section is inclined relative to the central axis of the guide sleeve, and the second section is parallel relative to the central axis of the guide sleeve. The sliding sleeve is axially slidably disposed within the through hole. The sliding sleeve has a sliding hole extending radially along the guide sleeve, and the locking pin is slidably disposed within the sliding sleeve. The upper end of the locking pin has pins on opposite sides, extending out of the outside of the sliding sleeve and into the guide hole of the guide sleeve. One end of the unlocking drive block has a locking hole. One end of the first traction member is connected to the sliding sleeve to drive the sliding sleeve to slide within the guide sleeve, thereby causing the locking pin to slide along the first section of the guide hole to the second section, and causing the other end of the locking pin to engage in the locking hole, thus driving the unlocking drive block to slide.

[0006] Compared with the prior art, this utility model sets up a guide sleeve with guide holes on both sides. Each guide hole has a first segment and a second segment, with the first segment inclined relative to the central axis of the guide sleeve. A sliding sleeve is axially slidably disposed within the through hole, and the locking pin is radially slidably disposed within the sliding sleeve. The pin of the locking pin is slidably disposed within the guide hole. Therefore, by using a first traction member to pull the sliding sleeve, the locking pin can initially move downwards along the direction of the first segment of the guide hole under the action of the sliding sleeve and the guide hole. At this stage, since the locking pin only approaches and engages with the unlocking drive block, it does not yet pull the unlocking drive block to move, and the unlocking drive block will not move or trigger the trolley unlocking. However, when the locking pin moves along the direction of the second segment of the guide hole, the axial movement of the locking pin drives the axial movement of the triggering drive block, thereby triggering the trolley unlocking. Therefore, this utility model divides the movement of the locking pin along the guide hole into two stages. The first stage is connected to the unlocking drive block, and the second stage drives the unlocking drive block to move. Thus, in the first stage, the user can accidentally trigger the first traction member, avoiding the accidental unlocking and closing of the trolley. Unlocking the trolley requires the locking pin to complete both the first and second stages to ensure a normal unlocking operation, thereby greatly improving the safety of use.

[0007] Preferably, the anti-accidental release device further includes a first operating mechanism, which is connected to the other end of the first traction member to pull the first traction member. The first operating mechanism 38 facilitates operation of the first traction member, improving ease of use.

[0008] Specifically, the first operating mechanism includes a base and an operating component, the operating component being movably disposed on the base, and the operating component being connected to the first traction component to drive the first traction component.

[0009] Specifically, the first operating mechanism further includes a guide seat, which is disposed on the base and has an elongated hole. The operating member is slidably disposed on the base and has a guide ramp. The other end of the first traction member has a sliding post, which is slidably disposed in the elongated hole. The guide ramp can slide in contact with the sliding post to drive the first traction member. By providing a guide seat with an elongated hole, and utilizing the guide ramp on the operating member in cooperation with the sliding post to drive the first traction member, the first traction member drives the sliding sleeve to slide. This allows the first traction member to be pulled by pressing, making it easier for the user to hold and operate, thus improving the convenience and comfort of operation.

[0010] Specifically, the first operating mechanism further includes a first spring, which is disposed between the operating member and the base to allow the operating member to reset. The placement of the first spring enables the operating member to automatically reset, improving operational convenience.

[0011] Specifically, the first operating mechanism further includes a secondary locking member, which is slidably disposed on the base and has a blocking portion and a clearance hole. The operating member has a top abutment. When the blocking portion is directly opposite the top abutment, the operating member is in a locked position; when the clearance hole is directly opposite the top abutment, the operating member is in an unlocked state. By providing the secondary locking member, accidental operation of the operating member can be further prevented, improving safety during use.

[0012] Specifically, the first operating mechanism further includes a second spring, which is disposed between the secondary locking member and the seat to provide an elastic force that directs the blocking portion toward the abutment. The second spring allows the secondary locking member to automatically reset, improving safety during use.

[0013] Preferably, the anti-accidental release device further includes an elastic reset member disposed between the sliding sleeve and the guide sleeve to reset the sliding sleeve.

[0014] A trolley includes a frame, a frame locking mechanism, and an anti-accidental release device. The frame locking mechanism is disposed between the rider's hand and feet of the frame to lock or unlock the frame. The anti-accidental release device is disposed inside the rider's hand of the frame. An unlocking drive block is connected to an unlocking trigger of the frame locking mechanism so that when the unlocking drive block slides, it drives the unlocking trigger to actuate, thereby unlocking the rider's hand and feet of the frame.

[0015] Preferably, the unlocking drive block and the unlocking trigger of the frame locking mechanism are connected by a flexible component. This allows the unlocking drive block to change from a moving motion to a rotating motion of the unlocking trigger, thereby facilitating the control of the frame locking mechanism to unlock the frame.

[0016] Preferably, the rider includes an upper rider and an lower rider. The upper rider is slidably fitted inside the lower rider, and the unlocking drive block is slidably disposed on the lower rider. The first traction member, guide sleeve, sliding sleeve, and locking pin are disposed on the upper rider. By providing the upper and lower riders, the rider can be extended, which is not only convenient to use, but also allows the sliding sleeve and locking pin to move away from the unlocking drive block when the rider is extended. Therefore, the locking pin cannot engage with the unlocking drive block, thus preventing the frame from being unlocked and preventing accidental operation.

[0017] Specifically, a telescopic locking mechanism is provided between the driver who gets on the vehicle and the driver who gets off the vehicle, so as to lock or unlock the driver who gets on the vehicle and the driver who gets off the vehicle.

[0018] Specifically, the upper handrail is provided with first engaging holes arranged axially, and the lower handrail is provided with multiple second engaging holes arranged axially. The telescopic locking mechanism includes a base, a second traction member, a drive sleeve, a slider, and a latch. The drive sleeve is axially slidably disposed within the guide sleeve. The middle part of the latch is pivotally connected to the base, and one end of the latch extends out of the base for manual operation. One end of the second traction member is connected to the drive sleeve, and the other end is connected to the other end of the latch. The drive sleeve is provided with a drive ramp, and the slider is radially slidably disposed within the guide sleeve. The drive ramp slides in contact with the slider to drive the slider to simultaneously extend into or retract from the first engaging hole and one of the second engaging holes. By using the second traction member and the drive sleeve to drive the slider to be inserted into the first engagement hole and the second engagement hole, the locking or unlocking of the rider and the alighting rider can be realized, thereby ensuring the stability of the connection between the rider and the alighting rider. The adjustable extension and retraction of the rider can meet the needs of different users and effectively improve the convenience and comfort of use.

[0019] Preferably, the frame includes a rider, a front foot, a rear foot, a handlebar joint, and a foot joint. The rider is fixedly connected to the handlebar joint, the front foot is pivotally connected to one end of the foot joint, and the rear foot is pivotally connected to the other end of the foot joint. The handlebar joint is pivotally connected to the foot joint, and the frame locking mechanism 2 is disposed between the handlebar joint and the foot joint to lock or release the latter two from each other.

[0020] Specifically, the frame further includes a first connecting rod, a second connecting rod, and a third connecting rod. One end of the first connecting rod is pivotally connected to the middle of the front foot, and the other end is pivotally connected to one end of the second connecting rod. The other end of the second connecting rod is pivotally connected to the middle of the rear foot. One end of the third connecting rod is pivotally connected to the handlebar joint, and the other end is pivotally connected to the middle of the second connecting rod. By setting the first connecting rod, the second connecting rod, and the third connecting rod, which are connected and combined with the rider, front and rear feet, handlebar joint, and foot joint, the frame can form a deformable support frame, thereby achieving stable support after locking the rider and foot joints. Its structure is simple and easy to fold.

[0021] Specifically, the frame locking mechanism includes an unlocking trigger, a joint gear, and a third spring. The inner side of the handlebar joint has a first engaging tooth that meshes with the joint gear, and the inner side of the foot joint has a second engaging tooth that meshes with the joint gear. The unlocking trigger is pivotally connected between the handlebar joint and the foot joint, and the unlocking trigger is axially movable. The joint gear is axially movable between the handlebar joint and the foot joint. The third spring is disposed between the joint gear and the foot joint. The unlocking drive block is connected to one end of a flexible component. The other end of the component is connected to the eccentric connection point of the unlocking trigger to drive the unlocking trigger to rotate. The unlocking trigger has a guide ramp, and the inner side of the handle joint has a protruding abutment. The abutment slides against the guide ramp. When the unlocking trigger rotates, it moves axially through the abutment and the guide ramp, thereby driving the joint gear to move axially. This causes the joint gear to engage only in the second engagement tooth, or to engage in both the first and second engagement teeth simultaneously under the elastic restoring force of the third spring. By setting the unlocking trigger, the driving force of rotation can be converted into an axial translational pushing force, which can push the joint gear to lock or release the frame. Its structure is simple, and unlocking is convenient and quick. Attached Figure Description

[0022] Figure 1 This is a perspective view of the trolley of this utility model.

[0023] Figure 2 This is a side view of the trolley of this utility model.

[0024] Figure 3 This is a side sectional view of the trolley of this utility model.

[0025] Figure 4 This is a side sectional view of the driver of the trolley of this utility model.

[0026] Figure 5 This is a side sectional view of the anti-accidental release device for the trolley of this utility model.

[0027] Figure 6 This is an exploded view of the anti-accidental release device for the trolley of this utility model.

[0028] Figure 7 This is an exploded view of the first operating mechanism of the trolley of this utility model.

[0029] Figure 8 This is a side sectional view of the telescopic locking mechanism of the trolley of this utility model.

[0030] Figure 9 This is an exploded view of the telescopic locking mechanism of the trolley of this utility model.

[0031] Figure 10 This is an exploded view of the frame locking mechanism of the trolley of this utility model.

[0032] Figure 11 This is a structural diagram of the unlocking trigger element in the frame locking mechanism of the trolley of this utility model. Detailed Implementation

[0033] To explain in detail the technical content, structural features, objectives and effects of this utility model, the following description is provided in conjunction with the embodiments and accompanying drawings.

[0034] Please see Figures 1 to 3 The trolley 100 of this utility model includes a frame 1, a frame locking mechanism 2, and an anti-accidental release device 3. The frame locking mechanism 2 is disposed between the handlebars 11 and the feet of the frame 1 to lock or unlock the frame 1. The anti-accidental release device 3 is disposed on the handlebars 11 of the frame 1; the anti-accidental release device 3 is connected to the frame locking mechanism 2 and triggers the frame locking mechanism 2, so that the frame locking mechanism 2 unlocks the handlebars 11 and feet of the frame 1.

[0035] Please see Figures 4 to 7The anti-accidental release device 3 includes a first traction member 31, a guide sleeve 32, a sliding sleeve 33, a locking pin 34, an unlocking drive block 35, and an elastic reset member 36. These components are housed within the rider 11 of the frame 1. The guide sleeve 32 has an axially extending through hole 321, and guide holes 322 are formed on opposite sides of the guide sleeve 32. Each guide hole 322 includes a first segment 322a and a second segment 322b communicating with the lower end of the first segment 322a. The first segment 322a is inclined relative to the central axis of the guide sleeve 32, extending downwards from the end near the unlocking drive block 35 towards the end away from the unlocking drive block 35. The second segment 322b is parallel to the central axis of the guide sleeve 32, and the first segment 322a is connected to the second segment 322b. The sliding sleeve 33 is slidably disposed within the through hole 321 along the central axis of the guide sleeve 32. The sliding sleeve 33 has a sliding hole 331 extending radially along the guide sleeve 32. The locking pin 34 is slidably disposed within the sliding hole 331 of the sliding sleeve 33 along the radial direction of the guide sleeve 32; the upper end of the locking pin 34 has pins 341 on opposite sides, the pins 341 extending outward from the outside of the sliding sleeve 33 and into the guide hole 322 of the guide sleeve 32, and the pins 341 can slide within the first section 322a and the second section 322b of the guide hole 322. The unlocking drive block 35 is disposed near the sliding sleeve 33, and one end of the unlocking drive block 35 has a locking hole 351; one end of the first traction member 31 is connected to the sliding sleeve 33, and the other end of the first traction member 31 extends along the inside of the handlebar 11 of the frame 1 to the gripping position of the handlebar 11 for easy operation; the first traction member 31 is a steel wire. When the first traction member 31 drives the sliding sleeve 33 to slide within the guide sleeve 32, the locking pin 34 slides along the first section 322a to the second section 322b of the guide hole 322, so that the other end of the locking pin 34 engages in the locking hole 351 and drives the unlocking drive block 35 to slide. The elastic reset member 36 is disposed between the sliding sleeve 33 and the guide sleeve 32 to reset the sliding sleeve 33. The elastic reset member 36 is a compression spring.

[0036] Please see again Figure 5 The unlocking drive block 35 is connected to the unlocking trigger 21 of the frame locking mechanism 2 via a flexible component 37. The flexible component 37 is a steel wire. This allows the unlocking drive block 35 to change from a moving motion to a rotating motion of the unlocking trigger 21, thereby facilitating the control of the frame locking mechanism 2 to unlock the frame 1.

[0037] Please see Figure 7The anti-accidental release device 3 further includes a first operating mechanism 38, which is located at the handholding position of the rider 11. The first operating mechanism 38 is connected to the other end of the first traction member 31, so that the rider can pull the first traction member 31 by operating the first operating mechanism 38. The first operating mechanism 38 facilitates operation of the first traction member 31, improving ease of use. Specifically, the first operating mechanism 38 includes a seat 381, an operating member 382, ​​a guide seat 383, and a first spring 384. The seat 381 is fixed to the handholding position of the rider 11, and the operating member 382 is slidably disposed on the seat 381. The guide seat 383 is disposed on the seat body 381 and has an elongated hole 383a. The operating member 382 has a guide inclined surface 382a. The other end of the first traction member 31 has a sliding column 311. The sliding column 311 is slidably disposed in the elongated hole 383a. When the operating member 382 is pressed, the operating member 382 slides so that the guide inclined surface 382a slides into contact with the sliding column 311, thereby driving the sliding column 311 to move in the elongated hole 383a. The sliding column 311 can then drive the first traction member 31. By setting the guide seat 383, an elongated hole 383a is provided on the guide seat 383, and the guide inclined surface 382a on the operating member 382 cooperates with the sliding column 311 to drive the first traction member 31, causing the first traction member 31 to drive the sliding sleeve 33 to slide. This allows the first traction member 31 to be pulled by pressing, making it easier for the user to operate while holding the handlebar 11, improving the convenience and comfort of operation. The first spring 384 is disposed between the operating member 382 and the seat 381 to allow the operating member 382 to return to its original position. The first spring 384 allows the operating member 382 to automatically return to its original position, improving the convenience of operation. The first spring 384 is a compression spring. Furthermore, the frame locking mechanisms 2 are respectively disposed on opposite sides of the frame 1. Therefore, the first traction member 31, guide sleeve 32, sliding sleeve 33, locking pin 34, unlocking drive block 35 and elastic reset member 36 are symmetrically disposed in the rider 11 on both sides of the frame 1. The number of the first operating mechanisms 38 can be set to one. It is only necessary to symmetrically arrange two guide inclined surfaces 382a on the operating member 382 and symmetrically arrange two elongated holes 383a on the guide seat 383. The two first traction members 31 can be controlled simultaneously by one operating member 382, ​​thereby triggering the unlocking of the frame locking mechanisms 2 on both sides of the frame 1.

[0038] Please see again Figure 7The first operating mechanism 38 further includes a secondary locking member 385 and a second spring 386. The secondary locking member 385 is slidably disposed on the base 381, and the sliding direction of the secondary locking member 385 is perpendicular to the sliding direction of the operating member 382. The secondary locking member 385 has a blocking part 385a and a clearance hole 385b, and the operating member 382 has a top abutment 382b. When the blocking part 385a is directly opposite the top abutment 382b, the operating member 382 is in a locked position; when the clearance hole 385b is directly opposite the top abutment 382b, the operating member 382 is in an unlocked state. By providing the secondary locking member 385, accidental operation of the operating member 382 can be further avoided, improving safety. The second spring 386 is disposed between the secondary locking member 385 and the base 381 to provide an elastic force that causes the blocking part 385a to be directly opposite the top abutment 382b. The secondary locking element 385 can be automatically reset by the second spring 386, which improves the safety of use.

[0039] Please see Figure 1 , Figure 4 and Figure 8 The rider 11 includes an upper rider 111 and a lower rider 112. The upper rider 111 has a U-shaped structure, and the first operating mechanism 38 is disposed on the horizontal tube in the middle of the upper rider 111. The vertical tube of the upper rider 111 is slidably fitted inside the lower rider 112. The unlocking drive block 35 is slidably disposed on the lower rider 112, and the first traction member 31, guide sleeve 32, sliding sleeve 33, and locking pin 34 are disposed on the upper rider 111. By setting the upper rider 111 and the lower rider 112, the rider 11 can be telescopically configured, which is not only convenient to use, but also allows the sliding sleeve 33 and the locking pin to move away from the unlocking drive block 35 when the rider 11 is in the extended state. Therefore, the locking pin cannot engage with the unlocking drive block 35, thus preventing the frame 1 from being unlocked, which has the function of preventing accidental operation.

[0040] Please see again Figure 8 and Figure 9A telescopic locking mechanism 4 is provided between the upper handle 111 and the lower handle 112 to lock or unlock them. Specifically, the upper handle 111 has first engaging holes 111a arranged axially, and the lower handle 112 has multiple second engaging holes 112a arranged axially. The telescopic locking mechanism 4 includes a base, a second traction member 41, a drive sleeve 42, a slider 43, a return spring 44, a lever 45, and a steering wheel 46. The base is integrally formed with the base 381 of the first operating mechanism 38, and the drive sleeve 42 is axially slidably disposed within the guide sleeve 32. The middle part of the lever 45 is pivotally connected to the base 381, and one end of the lever 45 extends out of the base 381 for manual operation. The steering wheel 46 is pivotally connected within the base 381. One end of the second traction member 41 is connected to the drive sleeve 42, and the other end passes through the steering wheel 46 and is connected to the other end of the latch 45. The drive sleeve 42 has a drive ramp 421. The slider 43 is radially slidably disposed within the guide sleeve 32, and the side of the slider 43 has a mating part 431, which is a mating ramp. The drive ramp 421 and the mating part 431 of the slider 43 slide in contact, driving the slider 43 to simultaneously extend into or retract from the first engaging hole 111a and one of the second engaging holes 112a. The return spring 44 is disposed between the guide sleeve 32 and the slider 43 to allow the slider 43 to insert into the first engaging hole 111a. By using the second traction member 41 and the drive sleeve 42 to drive the slider 43 to be inserted into the first engagement hole 111a and the second engagement hole 112a, the locking or unlocking of the upper rider 111 and the lower rider 112 can be realized, thereby ensuring the stability of the connection between the upper rider 111 and the lower rider 112. The adjustable extension and retraction of the rider 11 is suitable for the needs of different users, effectively improving the convenience and comfort of use.

[0041] For example Figure 1 and Figure 2As shown, the frame 1 includes a handlebar 11, a front foot 12, a rear foot 13, a handlebar joint 14, a foot joint 15, a first connecting rod 16, a second connecting rod 17, and a third connecting rod 18. The handlebar 11 is fixedly connected to the handlebar joint 14. The front foot 12 is pivotally connected to one end of the foot joint 15 at point A. A front wheel 121 is located at the lower end of the front foot 12. The rear foot 13 is pivotally connected to the other end of the foot joint 15 at point B. A rear wheel 131 is located at the lower end of the rear foot 13. The handlebar joint 14 is pivotally connected to the foot joint 15 at point O. The frame locking mechanism 2 is located between the handlebar joint 14 and the foot joint 15 to lock or unlock the latter two. One end of the first connecting rod 16 is pivotally connected to the middle of the front foot 12 at point C, and the other end is pivotally connected to one end of the second connecting rod 17 at point D. The other end of the second connecting rod 17 is pivotally connected to the middle of the rear foot 13, with the pivot point being E. One end of the third connecting rod 18 is pivotally connected to the handlebar joint 14, with the pivot point being F, and the other end is pivotally connected to the middle of the second connecting rod 17, G. By setting the first connecting rod 16, the second connecting rod 17, and the third connecting rod 18, which are connected and combined with the rider 11, the front foot 12 and the rear foot 13, the handlebar joint 14, and the foot joint 15, the frame 1 can form a deformable support frame, thereby achieving stable support after locking the rider 11 and the foot joint 15. Its structure is simple and easy to fold.

[0042] Please see Figure 3 , Figure 4 , Figure 10 and Figure 11The frame locking mechanism 2 includes an unlocking trigger 21, a joint gear 22, and a third spring 23. The inner side of the handlebar joint 14 is provided with a first engaging tooth 141 that meshes with the joint gear 22, and the inner side of the foot joint 15 is provided with a second engaging tooth 151 that meshes with the joint gear 22. The unlocking trigger 21 is pivotally connected between the handlebar joint 14 and the foot joint 15, and the unlocking trigger 21 is axially movable. The joint gear 22 is axially movable between the handlebar joint 14 and the foot joint 15. The third spring 23 is disposed between the joint gear 22 and the foot joint 15, and the third spring 23 is a compression spring. The unlocking drive block 35 is connected to one end of a flexible member 37, and the other end of the flexible member 37 is connected to the eccentric connection point of the unlocking trigger 21 to drive the unlocking trigger 21 to rotate. The unlocking trigger 21 is provided with a guide ramp 211, and the inner side of the handle joint 14 is provided with abutting protrusion 142, which slides against the guide ramp 211. When the unlocking trigger 21 rotates, it moves axially through the abutting protrusion 142 and the guide ramp 211, thereby driving the joint gear 22 to move axially, so that the joint gear (22) is only locked in the second engagement tooth (151), thereby releasing the handle joint 14 and the foot joint 15 from each other, or the joint gear (22) is simultaneously locked in the first engagement tooth (141) and the second engagement tooth (151) under the elastic restoring force of the third spring (23), thereby locking the handle joint 14 and the foot joint 15 from each other. By setting the unlocking trigger 21, the driving force of rotation can be converted into the pushing force of axial translation, thereby pushing the joint gear 22, locking or unlocking the frame 1. Its structure is simple and the unlocking is convenient and quick.

[0043] Based on the above and in conjunction with the accompanying drawings, the working principle of the trolley 100 of this utility model will be described in detail below: When the frame 1 is unfolded, and the extension length of the rider 11 needs to be adjusted, the lever 45 is operated, causing it to rotate upwards. The other end of the lever 45 drives the second traction member 41 to move. The second traction member 41 pulls the drive sleeve 42 to move. Under the action of the drive inclined surface 382a, the drive sleeve 42 drives the slider 43 to exit the first engagement hole 111a of the upper rider 111 and the second engagement hole 112a of the lower rider 112. At this time, the upper rider 111 and the lower rider 112 can be unlocked relative to each other. Then, the upper handle 111 is pushed to slide relative to the lower handle 112, so that the upper handle 111 retracts into the lower handle 112 until it is adjusted to a suitable length. Then, the first engagement hole 111a of the upper handle 111 coincides with the other second engagement hole 112a of the lower handle 112. At this time, the slider 43 is re-inserted into the first engagement hole 111a and the other second engagement hole 112a under the elastic force of the return spring 44, thereby locking the upper handle 111 and the lower handle 112 again.

[0044] When folding the trolley 100, the upper handle 111 must first be fully retracted into the lower handle 112. Once in position, the sliding sleeve 33 should be positioned above the unlocking drive block 35, and the locking pin 34 should be directly above the locking hole 351. Then, pressing the operating member 382 causes it to drive the first traction member 31, which pulls the sliding sleeve 33, causing it to move. This movement of the sliding sleeve 33 causes the pin 341 of the locking pin 34 to slide in the first segment 322a of the guide hole 322. During this process, the locking pin 34 moves downward relative to the sliding sleeve 33, thus engaging with the locking hole 351. Afterward, as the locking pin 34 slides from the first segment 322a to the second segment 322b, its axial movement causes the unlocking drive block 35 to move axially. The unlocking drive block 35 drives the unlocking trigger 21 to rotate via the flexible member 37. After rotating, the unlocking trigger 21 moves axially under the force of the abutment protrusion 152 and the guide slope 211. Then, the axial movement of the unlocking trigger 21 pushes the joint gear 22 to move, causing the joint gear 22 to disengage from the first engaging tooth 141 and engage only with the second engaging tooth 151. At this time, the handle joint 14 and the foot joint 15 can be released relative to each other. Afterward, the handle 11 can be operated with one hand, causing the handle 11 and the handle joint 14 to rotate. The rotation of the handle joint 14 drives the third link, which drives the pivot ends of the second link and the first link to swing upward. Finally, the front foot 12 and the rear foot 13 swing towards the middle, and the handle 11 and the rear foot 13 come together, realizing the complete folding of the entire trolley 100.

[0045] Compared with the prior art, the present invention provides a guide sleeve 32 with guide holes 322 on both sides, and the guide holes 322 have a first section 322a and a second section 322b. The first section 322a is inclined relative to the central axis of the guide sleeve 32. The sliding sleeve 33 is axially slidably disposed in the through hole 321, and the locking pin is slidably disposed in the sliding sleeve 33 along the radial direction of the guide sleeve 32. The pin 341 of the locking pin 34 is slidably disposed in the guide hole 322. Therefore, by using the first traction member 31 to pull the sliding sleeve 33, the locking pin 34 can initially move downwards along the first segment 322a of the guide hole 322 under the action of the sliding sleeve 33 and the guide hole 322. At this stage, since the locking pin 34 only approaches and engages with the unlocking drive block 35, it does not yet pull the unlocking drive block 35 to move, and the unlocking drive block 35 will not move or trigger the trolley 100 to unlock. However, when the locking pin 34 moves along the second segment 322b of the guide hole 322, the locking pin 34 moves axially, thereby causing the triggering drive block to move axially, which in turn triggers the trolley 100 to unlock. Therefore, this invention divides the movement of the locking pin 34 along the guide hole 322 into two stages. The first stage connects to the unlocking drive block 35, and the second stage drives the unlocking drive block 35 to move. This allows the user to accidentally trigger the first traction member 31 in the first stage, preventing the cart 100 from accidentally unlocking or closing. Unlocking the cart 100 requires the locking pin 34 to complete both the first segment 322a and the second segment 322b to ensure a normal unlocking operation, thus greatly improving safety. Furthermore, since the locking pin 34 can be separated from the unlocking drive block 35, the handlebar 11 can be designed as a telescopic structure. During use, the handlebar 11 can be extended, facilitating use and keeping the locking pin 34 away from the unlocking drive block 35, further preventing accidental unlocking of the frame 1 due to accidental contact and improving safety. Moreover, the cart 100 of this invention can be closed with one hand, making it very convenient to use.

[0046] The above-disclosed embodiments are merely preferred embodiments of the present utility model and should not be construed as limiting the scope of the present utility model. Therefore, any equivalent variations made in accordance with the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A false touch prevention release lock device (3) characterized by: The device includes a first traction member (31), a guide sleeve (32), a sliding sleeve (33), a locking pin (34), and an unlocking drive block (35). The guide sleeve (32) has an axially oriented through hole (321) and guide holes (322) on opposite sides. The guide hole (322) includes a first section (322a) and a second section (322b) communicating with the lower end of the first section (322a). The first section (322a) is inclined relative to the central axis of the guide sleeve (32), and the second section (322b) is parallel to the central axis of the guide sleeve (32). The sliding sleeve (33) is axially slidably disposed in the through hole (321). The sliding sleeve (33) has a sliding hole extending radially along the guide sleeve (32). The locking pin (34) is slidably disposed within the sliding sleeve (33); the upper end of the locking pin (34) is provided with axle pins (341) on opposite sides, the axle pins (341) extend out of the outside of the sliding sleeve (33) and into the guide hole (322) of the guide sleeve (32); one end of the unlocking drive block (35) is provided with a locking hole (351); one end of the first traction member (31) is connected to the sliding sleeve (33) to drive the sliding sleeve (33) to slide within the guide sleeve (32), thereby driving the locking pin (34) to slide along the first section (322a) of the guide hole (322) to the second section (322b), and causing the other end of the locking pin (34) to engage in the locking hole (351), thereby driving the unlocking drive block (35) to slide.

2. The anti-mistouch release device (3) according to claim 1, characterized in that: The anti-accidental release device (3) further includes a first operating mechanism (38), which is connected to the other end of the first traction member (31) to pull the first traction member (31).

3. The anti-mistaken-touch release lock device (3) according to claim 2, characterized in that: The first operating mechanism (38) includes a base (381) and an operating member (382). The operating member (382) is movably disposed on the base (381) and is connected to the first traction member (31) to drive the first traction member (31).

4. The anti-mistaken-touch release lock device (3) according to claim 3, characterized in that: The first operating mechanism (38) further includes a guide seat (383), which is disposed on the seat body (381) and has an elongated hole (383a). The operating member (382) is slidably disposed on the seat body (381) and has a guide inclined surface (382a). The other end of the first traction member (31) is provided with a sliding column (311), which is slidably disposed in the elongated hole (383a). The guide inclined surface (382a) can slide in contact with the sliding column (311) to drive the first traction member (31).

5. The anti-mistaken-touch release lock device (3) according to claim 4, characterized in that: The first operating mechanism (38) further includes a first spring (384), which is disposed between the operating member (382) and the seat (381) to reset the operating member (382).

6. The anti-mistouch release device (3) according to claim 3, characterized in that: The first operating mechanism (38) further includes a secondary locking member (385), which is slidably disposed on the base (381) and has a blocking part (385a) and a clearance hole (385b). The operating member (382) is provided with a top abutment (382b). When the blocking part (385a) is facing the top abutment (382b), the operating member (382) is in a locked position. When the clearance hole (385b) is facing the top abutment (382b), the operating member (382) is in an unlocked state.

7. The anti-mistaken-touch release lock device (3) according to claim 6, characterized in that: The first operating mechanism (38) further includes a second spring (386), which is disposed between the secondary locking member (385) and the seat (381) to provide an elastic force that causes the blocking part (385a) to face the abutment (382b).

8. The anti-mistouch release device (3) according to claim 1, characterized in that: The anti-accidental release device (3) further includes an elastic reset member (36), which is disposed between the sliding sleeve (33) and the guide sleeve (32) to reset the sliding sleeve (33).

9. A cart (100) characterized by: The system includes a frame (1), a frame locking mechanism (2), and an anti-accidental release device (3) as described in any one of claims 1 to 8. The frame locking mechanism (2) is disposed between the rider (11) and the foot of the frame (1) to lock or release the frame (1). The anti-accidental release device (3) is disposed inside the rider (11) of the frame (1). The unlocking drive block (35) is connected to the unlocking trigger (21) of the frame locking mechanism (2) so that when the unlocking drive block (35) slides, it drives the unlocking trigger (21) to move, thereby unlocking the rider (11) and foot of the frame (1) by the frame locking mechanism (2).

10. The cart (100) according to claim 9, characterized in that: The unlocking drive block (35) is connected to the unlocking trigger (21) of the frame locking mechanism (2) via a flexible component (37).

11. The cart (100) according to claim 9, characterized in that: The driver (11) includes an upper driver (111) and an lower driver (11). The upper driver (111) is slidably fitted inside the lower driver (11). The unlocking drive block (35) is slidably disposed on the lower driver (11). The first traction member (31), guide sleeve (32), sliding sleeve (33) and locking pin (34) are disposed on the upper driver (111).

12. The cart (100) according to claim 11, characterized in that: A telescopic locking mechanism (4) is provided between the driver (111) and the driver (11) to lock or unlock the driver (111) and the driver (11).

13. The cart (100) according to claim 12, characterized in that: The upper handrail (111) is provided with first engaging holes (111a) arranged axially, and the lower handrail (11) is provided with multiple second engaging holes (112a) arranged axially. The telescopic locking mechanism (4) includes a seat (381), a second traction member (41), a drive sleeve (42), a slider (43), and a latch (45). The drive sleeve (42) is axially slidably disposed within the guide sleeve (32). The middle part of the latch (45) is pivotally connected to the seat (381), and one end of the latch (45) extends outward. The seat (381) is provided for manual operation; one end of the second traction member (41) is connected to the drive sleeve (42), and the other end is connected to the other end of the buckle (45); the drive sleeve (42) is provided with a drive ramp (421), and the slider (43) is radially slidably disposed in the guide sleeve (32). The drive ramp (421) slides in contact with the slider (43) to drive the slider (43) to simultaneously extend into or exit the first engagement hole (111a) and one of the second engagement holes (112a).

14. The cart (100) of claim 9, characterized in that: The frame (1) includes a rider (11), a front foot (12), a rear foot (13), a handlebar joint (14), and a foot joint (15). The rider (11) is fixedly connected to the handlebar joint (14). The front foot (12) is pivotally connected to one end of the foot joint (15), and the rear foot (13) is pivotally connected to the other end of the foot joint (15). The handlebar joint (14) is pivotally connected to the foot joint (15). The frame locking mechanism (2) is disposed between the handlebar joint (14) and the foot joint (15) so that the latter two can lock or unlock each other.

15. The cart (100) according to claim 14, characterized in that: The frame (1) further includes a first connecting rod (16), a second connecting rod (17) and a third connecting rod (18). One end of the first connecting rod (16) is pivotally connected to the middle of the front foot (12), and the other end is pivotally connected to one end of the second connecting rod (17). The other end of the second connecting rod (17) is pivotally connected to the middle of the rear foot (13). One end of the third connecting rod (18) is pivotally connected to the handle joint (14), and the other end is pivotally connected to the middle of the second connecting rod (17).

16. The cart (100) of claim 14, characterized in that: The frame locking mechanism (2) includes an unlocking trigger (21), a joint gear (22), and a third spring (23). The inner side of the handlebar joint (14) is provided with a first engaging tooth (141) that meshes with the joint gear (22), and the inner side of the foot joint (15) is provided with a second engaging tooth (151) that meshes with the joint gear (22). The unlocking trigger (21) is pivotally connected between the handlebar joint (14) and the foot joint (15), and the unlocking trigger (21) is axially movable. The joint gear (22) is axially movable between the handlebar joint (14) and the foot joint (15). The third spring (23) is disposed between the joint gear (22) and the foot joint (15). The unlocking drive block (35) is connected to one end of a flexible component (37). The other end of the component (37) is connected to the eccentric connection point of the unlocking trigger (21) to drive the unlocking trigger (21) to rotate; the unlocking trigger (21) is provided with a guide slope (211), and the inner side of the handle joint (14) is provided with a push-off protrusion (142), which slides against the guide slope (211); when the unlocking trigger (21) rotates, it moves axially by the drive of the push-off protrusion (142) and the guide slope (211) to drive the joint gear (22) to move axially, so that the joint gear (22) is only locked in the second engagement tooth (151), or the joint gear (22) is simultaneously locked in the first engagement tooth (141) and the second engagement tooth (151) under the elastic restoring force of the third spring (23).

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