Cart capable of limiting rotation of wheel set

Abstract

The utility model discloses a cart capable of limiting rotation of wheel sets, which adopts the technical scheme that a front wheel set and a rear wheel set are respectively provided with a front locking piece and a rear locking piece, and are provided with a locking mechanism in a matching manner; the locking mechanism specifically acts on the front locking piece through a first locking rope and a first locking pin or acts on the rear locking piece through a second locking rope and a second locking pin to lock the front wheel set or the rear wheel set, and the first locking rope and the second locking rope are connected through a first sliding block and a second sliding block of the relieving mechanism respectively. The first sliding block and the second sliding block abut against each other through the movable part to move, so that the first locking rope and the second locking rope are moved, the first locking pin and the second locking pin are moved at the same time to achieve the unlocking and locking effects, the relieving mechanism moves through the triggering mechanism, and particularly, the triggering part moves through rotation of the handle pipe, so that the unlocking and locking effects are achieved. The rotation of the corresponding part of the wheel set is limited by rotating the handle pipe, and the wheel set has the advantages of being simple in structure and convenient to operate.

Description

Technical Field

[0001] This utility model relates to the field of baby stroller technology, and in particular to a stroller that can restrict the rotation of the wheel assembly. Background Technology

[0002] As a common tool for infants and toddlers' daily travel, the stability of movement and the flexibility of handling are core design elements of strollers. Most existing strollers use a four-wheel structure, with the rear wheels typically designed as swivel wheels that can rotate around a vertical axis for easy steering. However, during straight-line pushing, the free-rotating nature of the swivel wheels can easily cause the stroller to wobble, especially at high speeds or on inclines, posing a risk of tipping over and seriously threatening the safety of infants and toddlers.

[0003] In existing technology, strollers typically use pins or clips between the wheel frame and the stroller frame to forcibly fix the direction of the rear wheels, specifically employing manually inserted pins to lock the wheel frame angle. While this solution effectively restricts rotation, it requires the user to bend over to operate, and the pin components are susceptible to contamination from mud and sand, leading to jamming and failure. The existing stroller technology's structure for restricting wheel rotation is relatively complex and difficult to operate. Utility Model Content

[0004] The main purpose of this invention is to propose a stroller that can restrict the rotation of the wheel assembly, aiming to solve the technical problem that the structure for restricting the rotation of the wheel assembly in existing strollers is relatively complex and difficult to operate.

[0005] To achieve the above objectives, this utility model proposes a trolley that can restrict the rotation of the wheel assembly, comprising:

[0006] The wheel assembly includes a front wheel assembly and a rear wheel assembly, and the front wheel assembly and the rear wheel assembly are respectively equipped with a front lock and a rear lock;

[0007] The locking mechanism is used to lock the rotation direction of the front wheel assembly or the rear wheel assembly. The locking mechanism includes a first locking rope and a first locking pin for locking the front wheel assembly, and a second locking rope and a second locking pin for locking the rear wheel assembly. Correspondingly, the first locking pin and the second locking pin are respectively located at the first end of the first locking rope and the second locking rope, and the first locking pin and the second locking pin can respectively extend into the front locking member and the rear locking member to lock the front wheel assembly and the rear wheel assembly.

[0008] The release mechanism includes a movable member, a first adjustment component and a second adjustment component respectively disposed on both sides of the movable member, and a receiving seat. The movable member, the first adjustment component, and the second adjustment component are disposed in the receiving seat. The first adjustment component and the second adjustment component are respectively used to release the locking mechanism from locking the rotation direction of the front wheel assembly and the rear wheel assembly. The first adjustment component includes a first slider, and the second adjustment component includes a second slider. The first slider and the second slider are respectively disposed in the first movable cavity and the second movable cavity of the receiving seat, and are respectively connected to the second ends of the first locking rope and the second locking rope; and

[0009] The triggering mechanism includes a handle tube and a trigger element. The trigger element includes a trigger portion that can abut against the movable part. The trigger element is connected to the joint seat. The triggering mechanism drives the trigger portion to act on the movable part by rotating the handle tube between the first end and the second end. At the same time, the movable part is driven by the trigger portion to act on the first slider or the second slider to release the locking mechanism.

[0010] Furthermore, the trigger is fixedly connected to the handle tube, and the trigger part at least partially abuts against the movable part.

[0011] Furthermore, the movable part includes a first movable part for docking with the trigger and a second movable part for docking with the first slider or the second slider.

[0012] Furthermore, the movable component also includes a rotating shaft disposed between the first movable part and the second movable part. When the trigger part docks with the first movable part and the trigger part drives the first movable part to move, the rotating shaft rotates, and the second movable part moves with the first movable part and abuts against the first slider or the second slider to form a collision.

[0013] Furthermore, the first adjustment assembly also includes a first reset component for resetting the first slider, and correspondingly, the second adjustment assembly also includes a second reset component for resetting the second slider.

[0014] Furthermore, the first reset component and the second reset component are defined as springs, and the first slider and the second slider are respectively provided with a first receiving chamber and a second receiving chamber for accommodating at least a portion of the first reset component and a portion of the second reset component.

[0015] Furthermore, the second ends of the first locking rope and the second locking rope are respectively provided with a first fixing block and a second fixing block. Correspondingly, the first slider and the second slider are respectively provided with a first fixing groove and a second fixing groove for restricting the first fixing block and the second fixing block from disengaging.

[0016] Furthermore, the first fixing groove includes a first cavity for inserting the first locking rope and a second cavity for inserting the first fixing block. The first cavity and the second cavity are connected in a continuous manner, and the first fixing block cannot pass through the through-hole of the first cavity after being inserted into the second cavity. The second fixing groove includes a third cavity for inserting the second locking rope and a fourth cavity for inserting the second fixing block. The third cavity and the fourth cavity are connected in a continuous manner, and the second fixing block cannot pass through the through-hole of the third cavity after being inserted into the fourth cavity.

[0017] Furthermore, the first slider and the second slider are respectively provided with a first working surface and a second working surface for docking the moving parts.

[0018] Furthermore, it also includes a rotation start assembly for unlocking the rotation of the handlebar. The rotation start assembly includes an unlocking part disposed on the handlebar and a linkage rope, a pressing member, and a locking tooth disposed on the joint seat. The linkage rope is connected between the unlocking part and the pressing member. The unlocking part drives the pressing member to push the locking tooth through the linkage rope. The locking tooth disengages from the trigger member, thereby allowing the handlebar to enter a rotatable state.

[0019] This utility model provides a front lock and a rear lock for limiting rotation in the front and rear wheel sets, respectively. It also includes a locking mechanism for locking the rotation direction of either the front or rear wheel set. Specifically, the locking mechanism locks the front or rear wheel set by acting on the front lock with a first locking rope and a first locking pin, or by acting on the rear lock with a second locking rope and a second locking pin. The first and second locking ropes are connected by a first and a second slider of a release mechanism. These sliders abut against a movable part, causing movement that moves the first and second locking ropes and simultaneously moves the first and second locking pins, thus unlocking and locking. The release mechanism is activated by a trigger mechanism, specifically by rotating the handlebar to activate the trigger, causing it to contact the movable part and achieve the above steps. Rotating the handlebar restricts the rotation of the corresponding part of the wheel set. This utility model offers the advantages of simple structure and convenient operation. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of the present invention with the handle tube at the first end;

[0021] Figure 2 This is a three-dimensional structural diagram of the present invention when the handle tube is at the second end;

[0022] Figure 3 This is a cross-sectional view of the receiving seat portion of this utility model;

[0023] Figure 4 Plan view of the joint seat, receiving seat, and release mechanism;

[0024] Figure 5 Plan view of the locking mechanism and moving parts, the first adjustment assembly and the second adjustment assembly

[0025] Figure 6 Schematic diagram of the three-dimensional structure of the first and second movable parts. Figure 1 ;

[0026] Figure 7 Schematic diagram of the three-dimensional structure of the first and second movable parts. Figure 2 ;

[0027] Figure 8 A three-dimensional structural diagram of the front wheel assembly, the first locking rope, and the first locking pin;

[0028] Figure 9 A three-dimensional structural diagram of the rear wheel assembly, the second locking rope, and the second locking pin;

[0029] Figure 10 Disassembly of the triggering mechanism and rotary start assembly Figure 1 ;

[0030] Figure 11 Disassembly of the triggering mechanism and rotary start assembly Figure 2 ;

[0031] Figure 12 This is a three-dimensional structural diagram of the trigger element;

[0032] Figure 13 This is a schematic diagram of the planar structure of the trigger element.

[0033] The above figures include the following reference numerals:

[0034] 1. Wheel assembly; 11. Front wheel assembly; 111. Front locking element; 12. Rear wheel assembly; 121. Rear locking element; 2. Locking mechanism; 21. First locking rope; 22. First locking pin; 23. Second locking rope; 24. Second locking pin; 25. First fixing block; 26. Second fixing block; 3. Release mechanism; 31. Movable part; 311. First movable part; 312. Second movable part; 313. Rotating shaft; 32. First adjusting assembly; 321. First slider; 3211. First receiving chamber; 3212. First fixing groove; 32121. First cavity; 32122. Second cavity; 3213. First... 322. First reset component; 33. Second adjustment component; 331. Second slider; 3311. Second receiving chamber; 3312. Second fixing groove; 33121. Third cavity; 33122. Fourth cavity; 3313. Second working surface; 332. Second reset component; 34. Receiving seat; 341. First movable cavity; 342. Second movable cavity; 4. Trigger mechanism; 41. Handle tube; 42. Trigger element; 421. Trigger part; 422. Reset part; 5. Joint seat; 6. Rotary start component; 61. Unlocking part; 62. Linkage rope; 63. Pressing element; 64. Locking tooth. Detailed Implementation

[0035] The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0036] It should be noted that if any directional indication (such as up, down, left, right, front, back, top, bottom, inside, outside, vertical, horizontal, longitudinal, counterclockwise, clockwise, circumferential, radial, axial, etc.) is involved in the embodiments of this utility model, the directional indication is only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0037] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," such descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0038] This invention proposes a trolley that can restrict the rotation of the wheel assembly.

[0039] In this embodiment of the utility model, such as Figures 1 to 13As shown, the trolley that can restrict the rotation of the wheel assembly includes a wheel assembly 1, a locking mechanism 2 for locking the rotation direction of the wheel assembly 1, a release mechanism 3 for releasing the locking mechanism 2, and a triggering mechanism 4 for triggering the release mechanism 3. The wheel assembly 1 includes a front wheel assembly 11 and a rear wheel assembly 12, and the front wheel assembly 11 and the rear wheel assembly 12 are respectively provided with a front lock 111 and a rear lock 121. The locking mechanism 2 is used to lock the rotation direction of the front wheel assembly 11 or the rear wheel assembly 12, and the locking mechanism 2 includes a first locking rope 2 for locking the front wheel assembly 11. The system includes a first locking pin 22 and a second locking rope 23 and a second locking pin 24 for locking the rear wheel assembly 12. Correspondingly, the first locking pin 22 and the second locking pin 24 are respectively located at the first ends of the first locking rope 21 and the second locking rope 23, and the first locking pin 22 and the second locking pin 24 can respectively extend into the front locking member 111 and the rear locking member 121 to lock the front wheel assembly 11 and the rear wheel assembly 12. The release mechanism 3 includes a movable member 31 and a first adjusting component 32 and a second adjusting component 33 respectively disposed on both sides of the movable member 31. The receiving seat 34, the movable member 31, the first adjusting component 32, and the second adjusting component 33 are disposed in the receiving seat 34. The first adjusting component 32 and the second adjusting component 33 are respectively used to release the locking mechanism 2 from locking the rotation direction of the front wheel assembly 11 and the rear wheel assembly 12. The first adjusting component 32 includes a first slider 321, and the second adjusting component 33 includes a second slider 331. The first slider 321 and the second slider 331 are respectively disposed in the first movable cavity 341 and the second movable cavity 342 of the receiving seat 34. The triggering mechanism 4 is connected to the second ends of the first locking rope 21 and the second locking rope 23 respectively. The triggering mechanism 4 includes a handle tube 41 and a trigger member 42. The trigger member 42 includes a trigger part 421 that can abut against the movable member 31. The trigger member 42 is connected to the joint seat 5. The triggering mechanism 4 rotates the handle tube 41 between the first end and the second end to drive the trigger part 421 to act on the movable member 31. At the same time, the movable member 31 is driven by the trigger part 421 to act on the first slider 321 or the second slider 331 to release the locking mechanism 2.

[0040] In this embodiment of the utility model, the trigger 42 is fixedly connected to the handle tube 41, and the trigger part 421 at least partially abuts against the movable part 31. Through the fixed connection, when the handle tube 41 rotates, the trigger 42 can move synchronously with the handle tube 41, which enhances the accuracy of operation. At the same time, the trigger part 421 is used to actuate the movable part 31, so it can achieve its function by abutting part or all of it against the movable part 31. The partial abutment has the effect of reducing assembly difficulty and reducing the precision requirements of parts.

[0041] Specifically, the movable part 31 includes a first movable part 311 for docking with the trigger part 421 and a second movable part 312 for docking with the first slider 321 or the second slider 331. The first movable part 311 is abutted by the trigger part 421, causing the movable part 31 to move as a whole. Then the second movable part 312 acts on the first slider 321 or the second slider 331 to generate subsequent steps.

[0042] Furthermore, the movable component 31 also includes a rotating shaft 313 disposed between the first movable part 311 and the second movable part 312. When the trigger part 421 engages with the first movable part 311 and the trigger part 421 drives the first movable part 311 to move, the rotating shaft 313 rotates, and the second movable part 312 moves with the first movable part 311 and forms a swing, while simultaneously abutting against the first slider 321 or the second slider 331 to form a collision. Figure 5 As shown, the second movable part 312 abuts against the second slider 331 and causes the second slider 331 to move. Understandably, the initial position of the movable part 31 is that the first movable part 311 is facing upward. When the handle tube 41 is rotated, the first movable part 311 moves to the left or right, so that the second movable part 312 abuts against the first slider 321 or the second slider 331 and controls the state of the locking mechanism 2.

[0043] In an embodiment of this utility model, in order to reset the first slider 321 and the second slider 331 after they have been activated, the first adjustment component 32 further includes a first reset component 322 for resetting the first slider 321. Correspondingly, the second adjustment component 33 further includes a second reset component 332 for resetting the second slider 331.

[0044] Specifically, in a preferred embodiment of the present invention, the first reset component 322 and the second reset component 332 are defined as springs. Springs have the advantages of being easy to obtain and having a significant reset effect. Correspondingly, the first slider 321 and the second slider 331 are respectively provided with a first accommodating chamber 3211 and a second accommodating chamber 3311 for at least accommodating a portion of the first reset component 322 and a portion of the second reset component 332. During the movement of the first slider 321 or the second slider 331, the spring is compressed, and then a portion of the first reset component 322 or the second reset component 332 is respectively filled into the first accommodating chamber 3211 or the second accommodating chamber 3311.

[0045] In an embodiment of this utility model, in order to fix the ends of the first locking rope 21 and the second locking rope 23, the second ends of the first locking rope 21 and the second locking rope 23 are respectively provided with a first fixing block 25 and a second fixing block 26. Correspondingly, the first slider 321 and the second slider 331 are respectively provided with a first fixing groove 3212 and a second fixing groove 3312 for restricting the first fixing block 25 and the second fixing block 26 from disengaging. The first fixing block 25 and the second fixing block 26 are preferably spherical, and the spherical shape is safer when assembling parts.

[0046] Specifically, the first fixing groove 3212 includes a first cavity 32121 for inserting the first locking rope 21 and a second cavity 32122 for inserting the first fixing block 25. The first cavity 32121 and the second cavity 32122 are connected through each other. After the first fixing block 25 is inserted into the second cavity 32122, it cannot pass through the through-hole of the first cavity 32121. The second fixing groove 3312 includes a third cavity 33121 for inserting the second locking rope 23 and a fourth cavity 33122 for inserting the second fixing block 26. The third cavity 33121 and the fourth cavity 33122 are connected through each other. After the second fixing block 26 is inserted into the fourth cavity 33122, it cannot pass through the through-hole of the third cavity 33121.

[0047] In the embodiments of this utility model, the first slider 321 and the second slider 331 are respectively provided with a first working surface 3213 and a second working surface 3313 for docking with the movable part 31. Preferably, the first working surface 3213 and the second working surface 3313 are inclined surfaces formed on the first slider 321 or the second slider 331. By the inclined surface docking and collision, the operation of the first slider 321 and the second slider 331 is smoother. At the same time, the advantage of integral molding is that the structure is stable.

[0048] In an embodiment of this utility model, a rotation start assembly 6 for unlocking the rotation of the handle tube 41 is also included. The rotation start assembly 6 includes an unlocking part 61 disposed on the handle tube 41 and a connecting rope 62, a pressing member 63, and a locking tooth 64 disposed on the joint seat 5. The connecting rope 62 is connected between the unlocking part 61 and the pressing member 63. The unlocking part 61 pulls the connecting rope 62 to drive the pressing member 63 to push the locking tooth 64. The locking tooth 64 disengages from the trigger member 42, thereby allowing the handle tube 41 to enter a rotatable state.

[0049] Specifically, after the handle tube 41 rotates from the first end to the second section, in order to reset the locking teeth 64 and fix the handle tube 41 again, the trigger member 42 is also provided with a reset part 422 for resetting the pressing member 63. The reset part 422 and the pressing member 63 are at least partially engaged. When the handle tube 41 drives the trigger member 42 to rotate, the reset part 422 drives the pressing member 63 to reset, so that the pressing member 63 returns to the initial position.

[0050] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A trolley capable of restricting the rotation of its wheel assembly, characterized in that, include: The wheel assembly includes a front wheel assembly and a rear wheel assembly, and the front wheel assembly and the rear wheel assembly are respectively equipped with a front lock and a rear lock; The locking mechanism is used to lock the rotation direction of the front wheel assembly or the rear wheel assembly. The locking mechanism includes a first locking rope and a first locking pin for locking the front wheel assembly, and a second locking rope and a second locking pin for locking the rear wheel assembly. Correspondingly, the first locking pin and the second locking pin are respectively located at the first end of the first locking rope and the second locking rope, and the first locking pin and the second locking pin can respectively extend into the front locking member and the rear locking member to lock the front wheel assembly and the rear wheel assembly. The release mechanism includes a movable part, a first adjustment component and a second adjustment component respectively disposed on both sides of the movable part, and a receiving seat. The movable part, the first adjustment component and the second adjustment component are disposed in the receiving seat. The first adjustment component and the second adjustment component are respectively used to release the locking mechanism from locking the rotation direction of the front wheel assembly and the rear wheel assembly. The first adjustment component includes a first slider, and the second adjustment component includes a second slider. The first slider and the second slider are respectively disposed in the first movable cavity and the second movable cavity of the receiving seat, and are respectively connected to the second ends of the first locking rope and the second locking rope. as well as The triggering mechanism includes a handle tube and a trigger element. The trigger element includes a trigger portion that can abut against the movable part. The trigger element is connected to the joint seat. The triggering mechanism drives the trigger portion to act on the movable part by rotating the handle tube between the first end and the second end. At the same time, the movable part is driven by the trigger portion to act on the first slider or the second slider to release the locking mechanism.

2. The trolley as described in claim 1, characterized in that: The trigger is fixedly connected to the handle tube, and the trigger part at least partially abuts against the movable part.

3. The trolley as described in claim 2, characterized in that: The movable part includes a first movable part for docking with the trigger and a second movable part for docking with the first slider or the second slider.

4. The trolley as described in claim 3, characterized in that: The movable component also includes a rotating shaft disposed between the first movable part and the second movable part. When the trigger part docks with the first movable part and the trigger part drives the first movable part to move, the rotating shaft rotates, and the second movable part moves with the first movable part and abuts against the first slider or the second slider to form a collision.

5. The trolley as described in claim 1, characterized in that: The first adjustment assembly further includes a first reset component for resetting the first slider, and correspondingly, the second adjustment assembly further includes a second reset component for resetting the second slider.

6. The trolley as described in claim 5, characterized in that: The first reset component and the second reset component are defined as springs, and the first slider and the second slider are respectively provided with a first receiving chamber and a second receiving chamber for accommodating at least a portion of the first reset component and a portion of the second reset component.

7. The trolley as described in claim 1, characterized in that: The second ends of the first locking rope and the second locking rope are respectively provided with a first fixing block and a second fixing block. Correspondingly, the first slider and the second slider are respectively provided with a first fixing groove and a second fixing groove for restricting the first fixing block and the second fixing block from disengaging.

8. The trolley as described in claim 7, characterized in that: The first fixing groove includes a first cavity for inserting the first locking rope and a second cavity for inserting the first fixing block. The first cavity and the second cavity are connected in a continuous manner. After the first fixing block is inserted into the second cavity, it cannot pass through the continuous part of the first cavity. The second fixing groove includes a third cavity for inserting the second locking rope and a fourth cavity for inserting the second fixing block. The third cavity and the fourth cavity are connected in a continuous manner. After the second fixing block is inserted into the fourth cavity, it cannot pass through the continuous part of the third cavity.

9. The trolley as described in claim 1, characterized in that: The first slider and the second slider are respectively provided with a first working surface and a second working surface for docking the moving parts.

10. The trolley as described in claim 1, characterized in that: It also includes a rotation start assembly for unlocking the rotation of the handlebar tube. The rotation start assembly includes an unlocking part disposed on the handlebar tube and a linkage rope, a pressing member, and a locking tooth disposed on the joint seat. The linkage rope is connected between the unlocking part and the pressing member. The unlocking part drives the pressing member to push the locking tooth through the linkage rope. The locking tooth disengages from the trigger member, thereby allowing the handlebar tube to enter a rotatable state.

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