Linkage folding mechanism and stroller thereof

Abstract

The utility model relates to children carrier technical field, concretely relates to a linkage folding mechanism and children's push car thereof, including front leg pole, rear leg pole, seat frame and push rod subassembly, front leg pole upper end and push rod subassembly lower end all rotatably connect with rear leg pole upper end, seat frame is slidably connected with front leg pole, seat frame rear part is hinged with rear leg pole, and linkage subassembly is established between front leg pole and rear leg pole or between front leg pole and push rod subassembly, linkage subassembly is used for linkage front leg pole to rear leg pole folding or unfolding, and simultaneously front leg pole makes seat frame slide relative to front leg pole in folding or unfolding process, and linkage seat frame rotates relative to rear leg pole and correspondingly folds or unfolds. The structure of the application between seat frame and front leg pole is slidably connected, when front leg pole folds to rear leg pole, seat frame can be driven to slide relative to front leg pole, seat frame can be folded to rear leg pole synchronously, and compared with the linkage mechanism of the past, it can be more simple, and also can make seat frame more smooth and stable in the folding process.

Description

[Technical Field]

[0001] This utility model relates to the field of children's vehicle technology, specifically to a linkage folding mechanism and its children's stroller. [Background Technology]

[0002] Currently, most strollers on the market have a folding function for easy storage and carrying. Existing stroller folding mechanisms typically involve multiple steps or operations to fold different parts of the frame separately, which is cumbersome and results in a less compact overall structure that takes up a lot of space after folding.

[0003] Some strollers fold in a manner where the seat frame folds in conjunction with the front or rear legs of the frame via a linkage plate or rod. For example, a folding stroller frame disclosed in application number "201920304587.3" uses a drive rod to link the seat frame for folding. The structure of the seat frame's folding and unfolding via a linkage mechanism is relatively complex, and the linkages require gaps at their joints for smooth rotation. These gaps can cause the seat frame to wobble during folding, especially with prolonged use due to wear and tear, leading to larger gaps and making the seat frame folding and unfolding less smoothly.

[0004] In addition, during the folding process, the seat frame is prone to interference with the crossbar or foot pedal on the front foot bar, resulting in uneven folding or incomplete folding.

[0005] In view of the above-mentioned technical problems, this utility model is proposed in this study. [Utility Model Content]

[0006] The technical problem to be solved by this utility model is to provide a linkage folding mechanism and a child stroller thereof. By setting the seat frame and the front leg to slide together, when the front leg is folded towards the rear leg, the seat frame can be driven to slide relative to the front leg, and the seat frame can be folded towards the rear leg simultaneously. This solves the problem that existing child seat frames are prone to shaking and causing unevenness when folding and unfolding through linkage mechanisms.

[0007] To solve the above-mentioned technical problems, this utility model proposes a linkage folding mechanism for use on a stroller. This mechanism is used to fold or unfold the stroller in conjunction with the stroller. It includes a front leg 10, a rear leg 11, a seat frame 12, and a push rod assembly 13. The upper ends of the front leg 10 and the lower ends of the push rod assembly 13 are rotatably connected relative to the upper ends of the rear leg 11. The seat frame 12 is slidably connected to the front leg 10. The rear part of the seat frame 12 is hinged to the rear leg 11 via a first axis A. A linkage assembly 2 is provided between the front leg 10 and the rear leg 11, or between the front leg 10 and the push rod assembly 13. The linkage assembly 2 can receive the driving force for folding or unfolding the stroller, causing the front leg 10 to fold or unfold towards the rear leg 11. Simultaneously, during the folding or unfolding process, the front leg 10 causes the seat frame 12 to slide relative to the front leg 10, and the seat frame 12 rotates around the first axis A relative to the rear leg 11, thus folding or unfolding accordingly.

[0008] In the linkage folding mechanism described above, the upper end of the front leg 10 is rotatably connected to the upper end of the rear leg 11 via a second axis B, and the lower end of the push rod assembly 13 is rotatably connected to the upper end of the rear leg 11 via a third axis C. The linkage assembly 2 includes a driven gear 200 and a driving gear 201 meshing with it. The driven gear 200 is rotatably connected to the upper end of the rear leg 11 via the second axis B, and the driven gear 200 moves in tandem with the upper end of the front leg 10. The driving gear 201 is rotatably connected to the upper end of the rear leg 11 via the third axis C, and the driving gear 201 moves in tandem with the lower end of the push rod assembly 13.

[0009] As described above, in a linkage folding mechanism, the push rod assembly 13 includes a lower push rod 130 and a handle rod 131. The upper end of the lower push rod 130 is rotatably connected to the lower part of the handle rod 131 via a joint locking assembly 132. The linkage assembly 2 includes a front linkage member 20, a rear linkage member 21, and a drive member 22. The rear part of the rear linkage member 21 or the lower part of the drive member 22 is rotatably connected to the upper part of the rear foot rod 11. One end of the front linkage member 20 is directly or indirectly hinged to the front foot rod 10, and the other end of the front linkage member 20 is hinged to the front end of the rear linkage member 21. The lower end of the handle rod 131 is rotatably connected to the upper end of the drive member 22, and the lower end of the drive member 22 is movably connected to the rear end of the rear linkage member 21.

[0010] As described above, in a linkage folding mechanism, the rear linkage member 21 is provided with a first connecting limiting groove 210, and the rear end of the front linkage member 20 extends into the first connecting limiting groove 210 and is hinged to the rear linkage member 21, so that when the stroller is unfolded, the first connecting limiting groove 210 restricts the front linkage member 20 from moving relative to the rear linkage member 21 along its hinge axis direction.

[0011] As described above, in a linkage folding mechanism, a sliding member 3 is provided on the middle or front side of the seat frame 12, and the front leg 10 has a sliding groove 40 that slides with the sliding member 3; when the front leg 10 folds towards the rear leg 11, the sliding groove 40 drives the sliding member 3 to slide within it, thereby driving the seat frame 12 to fold.

[0012] As described above, in a linkage folding mechanism, a front connecting rod 100 is connected between the lower ends of the two front foot rods 10, and the slide 40 includes a straight groove section 41 and an inclined groove section 42 connected to the lower end of the straight groove section 41 and inclined outward.

[0013] When the front leg 10 folds toward the rear leg 11, the slide groove 40 forces the sliding member 3 to slide relative to the front leg 10, and the straight groove section 41 drives the sliding member 3 to transition to the inclined groove section 42, thereby causing the seat frame 12 to lift outward relative to the front leg 10 through the inclined groove section 42, so as to avoid the front part of the seat frame 12 from approaching and abutting the front connecting rod 100 and causing interference.

[0014] As described above, in a linkage folding mechanism, the inner side of the front leg 10 is provided with a connecting seat 4, and the slide groove 40 is provided on the connecting seat 4.

[0015] As described above, in a linkage folding mechanism, the front foot rod 10 is provided with an elastic pushing component 8 for elastically pressing the sliding member 3 when the stroller is in the unfolded or folded state, so that when the stroller is unlocked and folded or unfolded, the sliding member 3 is assisted by the elastic pushing component 8 and slides along the slide groove 40.

[0016] As described above, in a linkage folding mechanism, a sliding sleeve 5 is slidably provided on the front leg 10, and the middle or front side of the seat frame 12 is hinged to the sliding sleeve 5. When the front leg 10 folds towards the rear leg 11, the front leg 10 drives the sliding sleeve 5 to slide on it, thereby driving the seat frame 12 to fold.

[0017] As described above, in a linkage folding mechanism, a sliding block 6 is fixedly provided on the front leg 10, and a sliding groove 7 is provided on the seat 12 to slide in cooperation with the sliding block 6; when the front leg 10 rotates to the rear leg 11 to fold, the sliding block 6 slides in the sliding groove 7 to drive the seat 12 to fold towards the rear leg 11.

[0018] This utility model also provides a children's stroller using the aforementioned linkage folding mechanism, including a wheel assembly 9 and a handlebar 15 at the lower ends of the front leg bar 10 and the rear leg bar 11. The linkage assembly 2 includes a drive member 22, and the push rod assembly 13 includes a lower push rod 130 and a handlebar 131. The upper end of the lower push rod 130 is rotatably connected to the lower part of the handlebar 131 via a joint locking assembly 132. The handlebar 131 is provided with a frame unlocking assembly 133 for unlocking the linkage locking assembly 132. The lower end of the handlebar 131 is hinged to the upper end of the drive member 22, and the lower part of the drive member 22 is directly or indirectly hinged to the rear leg bar 11. The rear end of the handlebar 15 is hinged to the drive member 22, and a handlebar linkage member 16 is hinged between the rear part of the handlebar 15 and the lower push rod 130.

[0019] As described above, in a stroller, the armrest 15 is provided with a second connecting limiting groove 150 at its rear. The rear end of the armrest linkage 16 extends into the second connecting limiting groove 150 and is hinged to the armrest 15. When the stroller is unfolded, the second connecting limiting groove 150 restricts the armrest linkage 16 from moving relative to the armrest 15 along its hinge axis.

[0020] Compared with the prior art, the linkage folding mechanism and the stroller of this utility model have the following advantages:

[0021] 1. The linkage folding mechanism of this application, through the sliding cooperation between the base frame and the front leg, can drive the base frame to slide relative to the front leg when the front leg folds towards the rear leg, and the base frame can fold towards the rear leg synchronously. Compared with the previous method of using a linkage mechanism, the structure can be simpler and the base frame can be smoother and more stable during the folding and unfolding process.

[0022] 2. The linkage folding mechanism of this application sets the slide groove into a straight section and an inclined section. When the seat frame cooperates with the straight section, it can complete the folding quickly. When folded to the set position, the seat frame cooperates with the inclined section to raise the seat frame relative to the front leg, which effectively avoids interference between the front of the seat frame and the components on the front leg, making the folding smoother and more thorough. The structure is more compact after folding, which makes it easier for users to carry and store.

[0023] 3. The linkage folding mechanism of this application can restrict the movement of the front linkage relative to the hinge axis of the rear linkage by the first connecting limiting groove on the rear linkage, thereby improving the stability of the folding and unfolding action and making the stroller more stable after unfolding and folding, preventing the problem of loosening.

[0024] 4. The stroller of this application, by using a linkage folding mechanism, can fold more stably and smoothly, and can also be more compact after folding, making the stroller smaller in size and easier for users to carry and store. In addition, by setting a second connecting limit groove, the handlebars can be made more stable during folding and unfolding, and the stroller can be more stable after unfolding and folding, preventing loosening. [Attached Image Description]

[0025] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings, wherein:

[0026] Figure 1 This is one of the structural schematic diagrams of the children's stroller in this utility model.

[0027] Figure 2 This is the second structural schematic diagram of the children's stroller in this utility model.

[0028] Figure 3 This is a structural cross-sectional view of the children's stroller in this utility model.

[0029] Figure 4 This is a schematic diagram of the folding mechanism of the children's stroller in this utility model.

[0030] Figure 5 yes Figure 4 A schematic diagram of the structure at point E in the middle.

[0031] Figure 6 yes Figure 4 A schematic diagram of the structure at point F.

[0032] Figure 7 This is a schematic diagram of the folding structure of the children's stroller in this utility model.

[0033] Figure 8 This is a schematic diagram of the sliding component in this utility model.

[0034] Figure 9 This is a schematic diagram of the elastic jacking component in this utility model.

[0035] Figure 10 This is a partial structural diagram of the cooperation between the sliding block and the sliding groove in this utility model.

[0036] Figure 11 This is another schematic diagram of a partial structure of the cooperation between the sliding block and the sliding groove in this utility model.

[0037] Figure 12 This is a schematic diagram of the structure of the sliding sleeve and the front foot rod in this utility model.

[0038] Figure 13 This is a schematic diagram of the structure of the drive gear in this utility model.

[0039] In the diagram: 10. Front foot bar; 100. Front connecting rod; 11. Rear foot bar; 12. Seat frame; 13. Push rod assembly; 130. Lower push rod; 131. Handlebar; 132. Joint locking assembly; 133. Frame unlocking assembly; 15. Armrest; 150. Second connecting limit groove; 16. Armrest linkage component;

[0040] A. First axis; B. Second axis; C. Third axis;

[0041] 2. Linkage assembly; 200. Driven gear; 201. Drive gear; 20. Front linkage component; 21. Rear linkage component; 210. First connecting limit groove; 22. Drive component;

[0042] 3. Sliding component; 4. Connecting seat; 40. Slide groove; 41. Straight groove section; 42. Inclined groove section;

[0043] 5. Sliding sleeve;

[0044] 6. Sliding block; 7. Sliding groove;

[0045] 8. Elastic jacking assembly; 80. Pushing component; 81. Spring; 82. Strip hole;

[0046] 9. Wheel assembly.

Detailed Implementation Methods

[0047] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0048] like Figure 1-13 As shown, this utility model includes a linkage folding mechanism for use on a stroller. This mechanism is used to fold or unfold the stroller in conjunction with the stroller. It includes a front leg 10, a rear leg 11, a seat frame 12, and a push rod assembly 13. The upper ends of the front leg 10 and the lower ends of the push rod assembly 13 are rotatably connected relative to the upper ends of the rear leg 11. The seat frame 12 is slidably connected to the front leg 10. The rear part of the seat frame 12 is hinged to the rear leg 11 via a first axis A. A linkage assembly 2 is provided between the front leg 10 and the rear leg 11, or between the front leg 10 and the push rod assembly 13. The linkage assembly 2 can receive the driving force for folding or unfolding the stroller, causing the front leg 10 to fold or unfold towards the rear leg 11. Simultaneously, during the folding or unfolding process, the front leg 10 causes the seat frame 12 to slide relative to the front leg 10, and the seat frame 12 rotates around the first axis A relative to the rear leg 11, thus folding or unfolding accordingly.

[0049] In this application, when the front leg 10 folds towards the rear leg 11, the seat frame 12 slides relative to the front leg 10 under the drive of the front leg 10, thereby driving the seat frame 12 to fold towards the rear leg 11, which makes the stroller more smooth and stable during the folding process.

[0050] It should be noted that the method by which the linkage component 2 drives the front leg 10 to fold towards the rear leg 11 is a conventional technology in the field. For example, the application with application number "201310398407.X" entitled "Children's Stroller" discloses a technical solution in which the front leg 10 moves towards the rear leg 11 to fold during the folding process of a children's stroller. Therefore, it will not be described again in this embodiment.

[0051] like Figure 13 As shown, in this embodiment, when the linkage component 2 is located at the lower end of the push rod assembly 13 and the upper end of the front foot rod 10, the upper end of the front foot rod 10 is rotatably connected to the upper end of the rear foot rod 11 via the second axis B, and the lower end of the push rod assembly 13 is rotatably connected to the upper end of the rear foot rod 11 via the third axis C. The linkage component 2 includes a driven gear 200 and a driving gear 201 meshing with it. The driven gear 200 is rotatably connected to the upper end of the rear foot rod 11 via the second axis B, and the driven gear 200 moves in tandem with the upper end of the front foot rod 10. The driving gear 201 is rotatably connected to the upper end of the rear foot rod 11 via the third axis C, and the driving gear 201 moves in tandem with the lower end of the push rod assembly 13. When the push rod assembly 13 moves closer to the rear foot rod 11 and folds, it can rotate through the drive gear 201 and the driven gear 200, thereby driving the front foot rod 10 to move closer to the rear foot rod 11 and fold in sync. Through the cooperation of the drive gear 201 and the driven gear 200, the two can be made to fold more stably and smoothly during the folding process.

[0052] like Figures 1 to 12 As shown, in this embodiment, the push rod assembly 13 includes a lower push rod 130 and a handle rod 131. The upper end of the lower push rod 130 is rotatably connected to the lower part of the handle rod 131 through a joint locking assembly 132. The linkage assembly 2 includes a front linkage member 20, a rear linkage member 21, and a driving member 22. The rear part of the rear linkage member 21 or the lower part of the driving member 22 is rotatably connected to the upper part of the rear foot rod 11. One end of the front linkage member 20 is directly or indirectly hinged to the front foot rod 10, and the other end of the front linkage member 20 is hinged to the front end of the rear linkage member 21. The lower end of the handle rod 131 is rotatably connected to the upper end of the driving member 22, and the lower end of the driving member 22 is movably connected to the rear end of the rear linkage member 21.

[0053] When folding the stroller, push the handle 131 downwards to rotate the lever 130 to fold it. The handle 131 drives the drive component 22, which in turn drives the rear linkage component 21 to rotate. The rear linkage component 21 then drives the front linkage component 20 to move, and the front linkage component 20 can pull the front foot lever 10 towards the rear foot lever 11 to fold it.

[0054] It should be noted that the rear end of the seat frame 12 can be rotatably connected to the rear linkage 21 or to the lower end of the drive component 22, or it can be directly rotatably connected to the upper part of the rear foot rod 11. In this embodiment, the rear end of the seat frame 12 is preferably rotatably connected to the linkage 21, so as to avoid interference between the seat frame 12 and the rear foot rod 11 due to the setting of the linkage component 2.

[0055] like Figure 5 As shown, the rear linkage 21 is provided with a first connecting limiting groove 210. The rear end of the front linkage 20 extends into the first connecting limiting groove 210 and is hinged to the rear linkage 21. When the stroller is unfolded, the first connecting limiting groove 210 restricts the movement of the front linkage 20 relative to the rear linkage 21 along its hinge axis. By setting the first connecting limiting groove 210, the front linkage 20 can rotate in the first connecting limiting groove 210. The first connecting limiting groove 210 can protect the front linkage 20 and prevent it from moving along its hinge axis with the rear linkage 21. This prevents problems such as deformation, loosening, and wobbling of the front linkage 20. In this way, the stroller is more stable in both the folded and unfolded states, as well as during the folding or unfolding process, preventing the entire frame from loosening and jamming during folding and unfolding.

[0056] like Figures 1 to 9 As shown, in a preferred embodiment, the seat frame 12 has a sliding member 3 on its middle or front side, and the front leg 10 has a groove 40 that slides with the sliding member 3. When the front leg 10 folds towards the rear leg 11, the groove 40 drives the sliding member 3 to slide within it, thereby causing the seat frame 12 to fold. In this embodiment, when the front leg 10 is folded towards the rear leg 11 by the linkage assembly 2, the groove 40 forces the sliding member 3 to slide downward within it. Therefore, the seat frame 12 folds towards the rear leg 11 under the action of the front leg 10.

[0057] As a preferred embodiment, to ensure the stability of the front leg bar 10, a front connecting rod 100 is provided on the front leg bar 10. Both ends of the front connecting rod 100 are connected to the corresponding front leg bar 10. Furthermore, to provide a better riding experience for the child, a footrest is provided on the front leg bar 10. When the seat frame 12 is folded to a certain position, the front part of the seat frame 12 is prone to interference with the footrest or the front connecting rod 100, especially when a leg rest structure is provided on the seat frame 12. This makes interference with the front leg bar 10 more likely, preventing the front leg bar 10 from folding further towards the rear leg bar 11, resulting in an insufficiently compact folding of the entire frame. This makes the stroller more compact, facilitating carrying and storage for the user. The slide 40 includes a straight section 41 and an inclined section 42 connected to the lower end of the straight section 41 and sloping outwards. When the front leg 10 folds toward the rear leg 11, the slide groove 40 forces the sliding member 3 to slide relative to the front leg 10, and then the inclined groove section 42 causes the seat frame 12 to lift outward relative to the front leg 10, so as to avoid the front part of the seat frame 12 from approaching and abutting the front connecting rod 100 and causing interference. In this way, the front leg 10 and the seat frame 12 can fold more closely relative to the rear leg 11, so that the entire frame is folded more compactly, making it easier for users to carry and store.

[0058] Furthermore, to prevent damage to the structure of the front support rod 10 from directly creating the groove 40, a connecting seat 4 is provided. The connecting seat 4 is located on the inner side of the front support rod 10, and the groove 40 is located on the connecting seat 4. By providing the connecting seat 4, damage to the front support rod 10 can be avoided. The connecting seat 4, installed on the front support rod 10 and forming a whole with it, also makes the entire front support rod 10 more robust and stable. On the other hand, by providing the connecting seat 4, it is also easier to machine the groove 40 on the connecting seat 4.

[0059] In addition, to facilitate the unfolding or folding of the stroller, the front foot rod 10 is provided with an elastic pushing component 8 for elastically pressing the sliding member 3 when the stroller is in the unfolded or folded state, so that when the stroller is unlocked, folded or unfolded, the sliding member 3 is assisted by the elastic pushing component 8 and slides along the slide groove 40.

[0060] There are two elastic push-up components 8, located at the upper and lower parts of the front leg 10 respectively. When the stroller is in the unfolded position, the sliding member 3 is located at the upper end of the slide groove 40, and the sliding member 3 is in a state of pressing down on the elastic push-up component 8 at the upper part of the front leg 10. When folding the stroller, the elastic push-up component 8 can push the sliding member 3 downwards to facilitate the folding of the seat frame 12. Conversely, when the stroller is in the folded state, the sliding member 3 is located at the lower end of the slide groove 40, and the sliding member 3 is in a state of pressing down on the elastic push-up component 8 at the lower part of the front leg 10. When unfolding the stroller, the elastic push-up component 8 can push the sliding member 3 downwards to facilitate the unfolding of the seat frame 12. Therefore, by setting the elastic push-up component 8, the problem of jamming between the sliding member 3 and the slide groove 40 can be avoided. It can also provide assistance when unfolding and folding the stroller, making the folding and unfolding of the seat frame 12 more flexible and smooth, and thus making the entire stroller unfold and fold more smoothly.

[0061] It should be noted that the elastic jacking assembly 8 can be composed of a pusher 80 and a spring 81. The pusher 80 can slide in the slide groove 40. When the elastic jacking assembly 8 is located on the upper part of the front leg 10, the pusher 80 is located at the upper end of the slide groove 40, and the spring 81 is located between the pusher 80 and the top of the slide groove 40. The spring 81 can also be located between the pusher 80 and the top of the front leg 10. Conversely, when the elastic jacking assembly 8 is located on the lower part of the front leg 10, the pusher 80 is located at the lower end of the slide groove 40, and the spring 81 is located between the pusher 80 and the bottom of the slide groove 40.

[0062] In addition, in order to make the pusher 80 more stable during operation and to guide and limit the pusher 80, a strip hole 82 is provided on the pusher 80. When installing the connecting seat 4, the connecting seat 4 can be connected to the front foot rod 10 through the connecting shaft passing through the strip hole 82. In this way, the connecting seat 4 can be installed, and the pusher 80 can be limited at the same time, which makes it convenient for the staff to install and improves the assembly efficiency.

[0063] like Figure 12As shown, in another preferred embodiment, the front leg 10 is slidably provided with a sliding sleeve 5. The middle or front side of the seat frame 12 is hinged to the sliding sleeve 5. When the front leg 10 folds towards the rear leg 11, the front leg 10 drives the sliding sleeve 5 to slide on it, thereby causing the seat frame 12 to fold. Compared to the method of providing a sliding groove 40 on the front leg 10 to cooperate with the sliding member 3, this embodiment does not damage the front leg 10 and does not require an additional connecting seat 4 on the front leg 10, thus saving costs. Alternatively, a guide rod can be installed on the inner side of the front leg 10. The guide rod is not shown in the figure. The sliding sleeve 5 slides in conjunction with the guide rod to achieve the same function. The guide rod can also be similar in shape to the slide groove 40, with a two-section structure and the bottom tilting outwards. This allows the seat frame 12 to be raised relative to the front leg 10 after folding to the set position, avoiding interference. It should be noted that when using the sliding sleeve 5, elastic push-up components 8 can also be installed on both the upper and lower parts of the front leg 10 to cooperate with the sliding sleeve 5, facilitating the retraction and extension of the seat frame 12. The working principle of the elastic push-up component 8 and the sliding sleeve 5 is the same as that of the elastic push-up component 8 and the sliding element in the slide groove 40, and will not be elaborated further here.

[0064] like Figure 10 and Figure 11 As shown, in another preferred embodiment, a sliding block 6 is fixedly provided on the front leg 10, and a sliding groove 7 is provided on the seat frame 12 to slide in cooperation with the sliding block 6. When the front leg 10 rotates and folds towards the rear leg 11, the sliding block 6 slides in the sliding groove 7 to drive the seat frame 12 to fold towards the rear leg 11. In this embodiment, the sliding groove 7 can be directly provided on the seat frame 12, and the sliding block 6 can be provided on the front leg 10 to achieve the same effect. When the front leg 10 folds towards the rear leg 11, the sliding block 6 slides in the sliding groove 7, simultaneously driving the seat frame 12 to move closer to the rear leg 11 and fold. Similarly, in this solution, elastic pushing components 8 can also be provided on the upper, lower, front, and rear parts of the seat frame 12, which can also facilitate the unfolding and retraction of the seat frame 12, and thus facilitate the unfolding and retraction of the stroller.

[0065] like Figures 1 to 9As shown, this utility model also provides a children's stroller using the aforementioned linkage folding mechanism. The stroller includes a wheel assembly 9 and a handlebar 15 at the lower ends of both the front leg bar 10 and the rear leg bar 11. The linkage assembly 2 includes a drive member 22, and the push rod assembly 13 includes a lower push rod 130 and a handlebar 131. The upper end of the lower push rod 130 is rotatably connected to the lower part of the handlebar 131 via a joint locking assembly 132. The handlebar 131 is provided with a frame unlocking assembly 133 for unlocking the linkage locking assembly 132. The lower end of the handlebar 131 is hinged to the upper end of the drive member 22, and the lower part of the drive member 22 is directly or indirectly hinged to the rear leg bar 11. The rear end of the handlebar 15 is hinged to the drive member 22, and a handlebar linkage member 16 is hinged between the rear part of the handlebar 15 and the lower push rod 130.

[0066] When folding the stroller of this utility model, the frame unlocking component 133 is first unlocked in conjunction with the joint locking component 132. At this time, the handlebar 131 can rotate and fold relative to the lower push rod 130, and the lower push rod 130 can fold relative to the rear leg 11. During the folding process, the lower end of the handlebar 131 can drive the drive component 22, which in turn drives the rear linkage component 21 to rotate. In turn, the rear linkage component 21 drives the front linkage component 20 to move, and the front linkage component 20 can pull the front leg 10 towards the rear leg 11 to fold. The front leg 10 can then drive the seat frame 12 to fold towards the rear leg 11. At the same time, since the armrest 15 is connected to the lower push rod 130 through the armrest linkage component 16, and the rear end of the armrest 15 is hinged to the drive component 22, the drive component 22 will also drive the armrest 15 to rotate and fold down the lower push rod 130, realizing one-button folding and improving folding efficiency. Furthermore, the stroller of this application, by using the linkage folding mechanism of this application, can be folded more stably and smoothly, and can also be made more compact after folding, making the stroller smaller in size, which is convenient for users to carry and store.

[0067] In addition, the armrest 15 is provided with a second connecting limiting groove 150 at the rear. The rear end of the armrest linkage 16 extends into the second connecting limiting groove 150 and is hinged to the armrest 15. When the stroller is unfolded, the second connecting limiting groove 150 restricts the armrest linkage 16 from moving relative to the armrest 15 along its hinge axis.

[0068] In this embodiment, by providing the second connecting limiting groove 150, the handrail linkage 16 can rotate within the second connecting limiting groove 150. The second connecting limiting groove 150 can protect the handrail linkage 16, preventing it from moving along its hinge axis with the handrail 15. This prevents problems such as deformation, loosening, or wobbling of the handrail linkage 16. Thus, the handrail 15 is more stable in both its folded and unfolded states, and during the folding or unfolding process, preventing it from becoming loose. Especially in the unfolded state, the handrail 15 remains stable, preventing it from wobbling under force. Furthermore, it prevents jamming during the folding and unfolding process.

[0069] In addition, in this embodiment, when the stroller is folded up, the two wheel sets 9 on the front leg 10 are positioned between the two wheel sets 9 on the rear leg 11 and the two wheel sets 9 on the rear leg 11. This avoids interference between the wheel sets 9 on the front leg 10 and the wheel sets 9 on the rear leg 11 on the same side, making the stroller more compact when folded up and smaller in size, so that users can carry and store it.

[0070] It should be noted that the structure of the frame unlocking component 133, which is linked to the joint locking component 132 to unlock the lower push rod 130 and the rear foot rod 11, and the structure of the unlocking handle rod 131 relative to the lower push rod 130, is conventional technology in the field. For example, it has been disclosed in application number "201920304587.3" entitled "A Folding Frame for a Child Stroller" or application number "201922272129.9" entitled "A Folding Frame for a Child Stroller". Therefore, it will not be described again in this application.

Claims

1. A linkage folding mechanism for use in a child's stroller for folding or unfolding the stroller in unison, comprising a front leg (10), a rear leg (11), a seat frame (12) and a push bar assembly (13), the upper end of the front leg (10) and the lower end of the push bar assembly (13) are rotatably connected to the upper end of the rear leg (11), characterized in that The seat frame (12) is slidably connected to the front leg (10). The rear of the seat frame (12) is hinged to the rear leg (11) via a first axis (A). A linkage component (2) is provided between the front leg (10) and the rear leg (11) or between the front leg (10) and the push rod assembly (13). The linkage component (2) can accept the driving force of the stroller to fold or unfold, causing the front leg (10) to fold or unfold towards the rear leg (11). At the same time, during the folding or unfolding process, the front leg (10) causes the seat frame (12) to slide relative to the front leg (10), and the linkage causes the seat frame (12) to rotate relative to the rear leg (11) around the first axis (A) to fold or unfold accordingly.

2. The linkage folding mechanism of claim 1, wherein The upper end of the front leg (10) is rotatably connected to the upper end of the rear leg (11) via the second axis (B), and the lower end of the push rod assembly (13) is rotatably connected to the upper end of the rear leg (11) via the third axis (C). The linkage assembly (2) includes a driven gear (200) and a driving gear (201) meshing with it. The driven gear (200) is rotatably connected to the upper end of the rear leg (11) via the second axis (B), and the driven gear (200) is arranged to move in sync with the upper end of the front leg (10). The driving gear (201) is rotatably connected to the upper end of the rear leg (11) via the third axis (C), and the driving gear (201) is arranged to move in sync with the lower end of the push rod assembly (13).

3. The linkage folding mechanism of claim 1, wherein The push rod assembly (13) includes a lower push rod (130) and a handle bar (131). The upper end of the lower push rod (130) is rotatably connected to the lower part of the handle bar (131) through a joint locking assembly (132). The linkage assembly (2) includes a front linkage member (20), a rear linkage member (21), and a drive member (22). The rear part of the rear linkage member (21) or the lower part of the drive member (22) is rotatably connected to the upper part of the rear foot bar (11). One end of the front linkage member (20) is directly or indirectly hinged to the front foot bar (10), and the other end of the front linkage member (20) is hinged to the front end of the rear linkage member (21). The lower end of the handle bar (131) is rotatably connected to the upper end of the drive member (22), and the lower end of the drive member (22) is movably connected to the rear end of the rear linkage member (21).

4. The linkage folding mechanism of claim 3, wherein The rear linkage (21) is provided with a first connecting limiting groove (210). The rear end of the front linkage (20) extends into the first connecting limiting groove (210) and is hinged to the rear linkage (21). When the stroller is unfolded, the first connecting limiting groove (210) restricts the front linkage (20) from moving relative to the rear linkage (21) along its hinge axis.

5. A linkage folding mechanism according to any one of claims 1 to 4, wherein The seat frame (12) is provided with a sliding member (3) on the middle or front side, and the front leg (10) has a sliding groove (40) that slides with the sliding member (3); when the front leg (10) folds to the rear leg (11), the sliding groove (40) drives the sliding member (3) to slide in it, thereby driving the seat frame (12) to fold.

6. The linkage folding mechanism according to claim 5, characterized in that... A front connecting rod (100) is connected between the lower ends of the two front foot rods (10), and the slide (40) includes a straight groove section (41) and an inclined groove section (42) connected to the lower end of the straight groove section (41) and inclined outward; When the front leg (10) folds toward the rear leg (11), the slide groove (40) forces the slider (3) to slide relative to the front leg (10), and the straight groove section (41) drives the slider (3) to transition to the inclined groove section (42), thereby causing the seat frame (12) to lift outward relative to the front leg (10) through the inclined groove section (42) to avoid the front part of the seat frame (12) from approaching and abutting against the front connecting rod (100) and causing interference.

7. The linkage folding mechanism according to claim 5, characterized in that... The inner side of the front foot rod (10) is provided with a connecting seat (4), and the sliding groove (40) is provided on the connecting seat (4).

8. The linkage folding mechanism according to claim 1, characterized in that... The front foot bar (10) is provided with an elastic push assembly (8) for elastically pressing the sliding member (3) when the stroller is in the unfolded or folded state, so that when the stroller is unlocked, folded or unfolded, the sliding member (3) is assisted by the elastic push assembly (8) and slides along the slide groove (40).

9. A linkage folding mechanism according to any one of claims 1 to 3, characterized in that... The front leg (10) is slidably provided with a sliding sleeve (5). The middle or front side of the seat frame (12) is hinged to the sliding sleeve (5). When the front leg (10) folds towards the rear leg (11), the front leg (10) drives the sliding sleeve (5) to slide on it, thereby driving the seat frame (12) to fold.

10. A linkage folding mechanism according to any one of claims 1 to 3, characterized in that... A sliding block (6) is fixed on the front leg (10), and a sliding groove (7) is provided on the seat frame (12) to slide in cooperation with the sliding block (6); when the front leg (10) rotates and folds to the rear leg (11), the sliding block (6) slides in the sliding groove (7) to drive the seat frame (12) to fold to the rear leg (11).

11. A children's stroller, characterized in that... The linkage folding mechanism according to any one of claims 1 to 10 includes a wheel assembly (9) and a handle (15) at the lower ends of both the front leg (10) and the rear leg (11). The linkage assembly (2) includes a drive member (22), and the push rod assembly (13) includes a lower push rod (130) and a handle rod (131). The upper end of the lower push rod (130) and the lower part of the handle rod (131) are rotatably connected by a joint locking assembly (132). The handlebar (131) is provided with a frame unlocking assembly (133) for unlocking the linkage joint locking assembly (132). The lower end of the handlebar (131) is hinged to the upper end of the drive member (22). The lower part of the drive member (22) is directly or indirectly hinged to the rear foot bar (11). The rear end of the armrest (15) is hinged to the drive member (22). The rear part of the armrest (15) is hinged to the lower push rod (130) with an armrest linkage member (16).

12. A child stroller according to claim 11, characterized in that... The armrest (15) is provided with a second connecting limiting groove (150) at the rear. The rear end of the armrest linkage (16) extends into the second connecting limiting groove (150) and is hinged to the armrest (15). When the stroller is unfolded, the second connecting limiting groove (150) restricts the armrest linkage (16) from moving relative to the armrest (15) along its hinge axis.

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