A child's vehicle frame capable of cooperative linkage folding

Abstract

The utility model discloses a child's car frame of cooperation linkage can be retracted, can be switched between the unfolded use state and the retracted use state corresponding use, including front foot pole, rear foot pole, seat pole, backrest pole, sliding seat, frame linkage assembly, through the sliding seat along the rear foot pole single axis direction sliding, trigger frame linkage assembly synchronous drive front foot pole, seat pole, backrest pole cooperation retraction, so that the user only needs to push or pull the sliding seat to complete the child's car frame unfolding and retraction action, simplifies the operation process, improves the operation use convenience, especially suitable for the user one -handed baby when fast retraction car.

Description

[Technical Field]

[0001] This utility model relates to the field of children's travel products technology, and in particular to a children's bicycle frame that can be retracted and extended in a coordinated manner. [Background Technology]

[0002] Strollers are common products during a child's growth process. They can generally be unfolded or folded. When unfolded, they are used for children to ride in and out, while when folded, they are convenient to carry or store.

[0003] The structure of a stroller frame directly affects the ease of folding and the compactness of the folded size. Currently, there are various stroller frame linkage structures on the market, with different folding principles, but they all exhibit significant deficiencies in the coordination between unfolding and folding.

[0004] 1. The unfolding and folding of various functional components such as the seat, armrests, and backrest are often independent of the folding process of the main frame. Users need to operate the frame lock and the unfolding / folding of the seat / armrest / backrest separately, which is cumbersome and time-consuming, especially in the scenario of holding a baby with one hand.

[0005] 2. Although some products attempt to simplify operation through linkages, the unreasonable design of the linkage path often results in asynchronous retraction and extension, affecting the reliability of use.

[0006] 3. The overall size of the stroller frame is relatively large when folded.

[0007] Therefore, this utility model was developed to address the aforementioned problems. [Utility Model Content]

[0008] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a stroller frame that can be folded and unfolded in a coordinated manner. By sliding the sliding seat along the single axis of the rear leg, the frame linkage components are triggered to synchronously drive the front leg, seat, and backrest to fold and unfold in a coordinated manner. Therefore, the user only needs to push or pull the sliding seat to complete the unfolding and folding of the stroller frame, simplifying the operation process and improving the convenience of operation. It is especially suitable for users to quickly fold the stroller when holding a child with one hand.

[0009] To address the aforementioned technical problems, this utility model provides a child stroller frame that can be collaboratively extended and retracted, allowing for switching between extended and folded usage states, including:

[0010] Front support rod 1, the lower end of which is connected to front wheel assembly 10;

[0011] Rear foot lever 2, the upper end of which is hinged to the upper end of the front foot lever 1 at pivot A, and the lower end of the rear foot lever 2 is connected to the rear wheel assembly 20;

[0012] Seat post 3, the front or middle part of which is rotatably and slidably connected to the rear foot post 2;

[0013] Backrest rod 4, the lower end of which is hinged to the upper end of rear leg rod 2 at pivot B;

[0014] A sliding seat 50 is directly or indirectly disposed on the rear foot rod 2 and can slide along its axial direction;

[0015] The frame linkage assembly 5 is located between the front leg bar 1, the seat bar 3, the backrest bar 4 and the sliding seat 50, and is configured such that when the sliding seat 50 slides down along the rear leg bar 2, the front leg bar 1, the seat bar 3 and the backrest bar 4 are folded accordingly.

[0016] As described above, in a children's bicycle frame that can be retracted and extended in a coordinated manner, the frame linkage component 5 is configured such that when the sliding seat 50 slides down along the rear foot bar 2, the front foot bar 1, seat bar 3, and backrest bar 4 are retracted and moved towards the rear foot bar 2 side accordingly.

[0017] As described above, a children's bicycle frame that can be retracted and extended in a coordinated manner includes an upper linkage component 51 and a lower linkage component 52. The upper end of the upper linkage component 51 is hinged to the backrest rod 4 at pivot C, the middle or lower part of the upper linkage component 51 is hinged to the seat rod 3 at pivot D, and the lower end of the upper linkage component 51 is hinged to the sliding seat 50 at pivot E. The rear end of the lower linkage component 52 is hinged to the sliding seat 50 at pivot F, and the front end of the lower linkage component 52 is hinged to the front leg rod 1 at pivot G.

[0018] As described above, a children's bicycle frame that can be retracted and extended in a coordinated manner includes an upper linkage 51, a backrest rod 4, a sliding seat 50, and a rear leg rod 2 connected to form a crank-slider mechanism; and a lower linkage 52, a front leg rod 1, a sliding seat 50, and a rear leg rod 2 connected to form a crank-slider mechanism.

[0019] As described above, a children's stroller frame that can be retracted and extended in a coordinated manner also includes a handlebar connecting rod 6 connected to a handlebar 60. The front or middle part of the handlebar connecting rod 6 is rotatably and slidably connected to the lower part of the backrest rod 4. The frame linkage assembly 5 is also configured to retract the handlebar connecting rod 6 in a corresponding manner when the sliding seat 50 slides down along the rear foot rod 2.

[0020] As described above, a child bicycle frame that can be retracted and extended in a coordinated manner includes an upper linkage component 51 and a lower linkage component 52. The upper end of the upper linkage component 51 is hinged to the backrest rod 4 at pivot C, the middle or lower part of the upper linkage component 51 is hinged to the seat rod 3 at pivot D, and the lower end of the upper linkage component 51 is hinged to the sliding seat 50 at pivot E. The rear end of the lower linkage component 52 is hinged to the sliding seat 50 at pivot F, and the front end of the lower linkage component 52 is hinged to the front leg rod 1 at pivot G. The rear end of the armrest connecting rod 6 is hinged to the middle or lower part of the upper linkage component 51 at pivot H.

[0021] As described above, a child stroller frame that can be retracted and extended in a coordinated manner includes a backrest rod 4 with an armrest connecting seat 61. The armrest connecting seat 61 and the backrest rod 4 are hinged to pivot I located between pivot B and pivot C. An armrest hole sleeve 62 is fixedly connected to the armrest connecting seat 61, and the armrest connecting rod 6 is slidably inserted into the armrest hole sleeve 62.

[0022] As described above, a children's bicycle frame that can be retracted and extended in a coordinated manner has a guide slide rod 21 extending along its axis on the inner side of the rear foot rod 2, and the sliding seat 50 is slidably connected to the guide slide rod 21; the two sliding seats 50 are connected to each other by a transverse connecting rod 501.

[0023] As described above, a child bicycle frame that can be retracted and extended in a coordinated manner has a seat connecting seat 22 at the upper end of the rear leg 2. A seat hole sleeve 221 is hinged to the seat connecting seat 22 via a pivot J, and the seat bar 3 is slidably inserted into the seat hole sleeve 221.

[0024] As described above, a child stroller frame that can be retracted and extended in a coordinated manner includes a backrest rod locking mechanism 41 between the backrest rod 4 and the rear leg rod 2 for locking the backrest rod 4 relative to the rear leg rod 2, and a backrest rod unlocking mechanism 42 on the backrest rod 4 that is linked to the backrest rod locking mechanism 41.

[0025] As described above, a child stroller frame that can be retracted and extended in a coordinated manner includes a backrest locking mechanism 41 comprising a backrest locking groove 411 located on opposite sides of the lower end of the backrest 4 and the upper end of the rear leg 2, and a backrest locking gear 412 slidably located between the lower end of the backrest 4 and the upper end of the rear leg 2 and capable of simultaneously engaging with the backrest locking groove 411 at both ends of the backrest 4 and the rear leg 2. A backrest locking elastic element 413 is provided between the backrest locking gear 412 and the upper end of the rear leg 2 for driving the backrest locking gear 412 to elastically reset. The backrest rod unlocking mechanism 42 is linked to the backrest rod locking gear 412; the backrest rod unlocking mechanism 42 includes a backrest rod unlocking rotating block 423 rotatably disposed between the lower end of the backrest rod 4 and the backrest rod locking gear 412 for pushing the backrest rod locking gear 412 to slide; the backrest rod unlocking mechanism 42 also includes a backrest rod unlocking operating member 421 movably disposed on the backrest rod 4 and a backrest rod unlocking linkage member 422 passing through the backrest rod 4 and connected to the backrest rod unlocking operating member 421 and the backrest rod unlocking rotating block 423 respectively.

[0026] As described above, a children's bicycle frame that can be retracted and extended in a coordinated manner also includes a push rod assembly 7. The lower end of the push rod assembly 7 is hinged to the upper end of the rear leg 2 at a pivot K. A push rod locking mechanism 71 is provided between the lower end of the push rod assembly 7 and the upper end of the rear leg 2 for locking the push rod assembly 7 relative to the rear leg 2. A push rod unlocking mechanism 72 that is linked to the push rod locking mechanism 71 is provided on the push rod assembly 7.

[0027] As described above, in a children's bicycle frame that can be retracted and extended in a coordinated manner, the push rod assembly 7 has a forward pushing mode that extends from front to back and upward and a backward pushing mode that extends from back to front and upward in its rotational stroke. The push rod locking mechanism 71 is configured to lock the push rod assembly 7 in either the forward pushing mode or the backward pushing mode.

[0028] As described above, a child stroller frame that can be retracted and extended in a coordinated manner is provided with a forward blocking component 73 for blocking and limiting the push rod assembly 7 when the push rod assembly 7 is in the forward pushing mode and a reverse blocking component 74 for blocking and limiting the push rod assembly 7 when the push rod assembly 7 is in the backward pushing mode.

[0029] As described above, in a child stroller frame that can be retracted and extended in a coordinated manner, the forward blocking assembly 73 is located between the backrest rod 4 and the push rod assembly 7, and includes a first forward blocking member 731 disposed on the backrest rod 4 and a second forward blocking member 732 disposed on the backrest assembly for blocking cooperation with the first forward blocking member 731; the reverse blocking assembly 74 is located between the rear leg rod 2 and the push rod assembly 7, and includes a first reverse blocking member 741 disposed on the upper end of the rear leg rod 2 and a second reverse blocking member 742 disposed on the push rod assembly 7 for blocking cooperation with the first reverse blocking member 741.

[0030] As described above, a child stroller frame that can be retracted and extended in a coordinated manner includes a push rod locking mechanism 71 comprising a push rod locking tooth groove 711 located on opposite sides of the upper end of the rear leg 2 and the lower end of the push rod assembly 7, and a push rod locking gear 712 slidably located between the upper end of the rear leg 2 and the lower end of the push rod assembly 7, capable of simultaneously engaging the push rod locking tooth groove 711 of both the upper end of the rear leg 2 and the lower end of the push rod assembly 7. A push rod locking elastic element 713 is provided between the push rod locking gear 712 and the upper end of the rear leg 2 for driving the push rod locking gear 712 to elastically reset. The push rod unlocking mechanism 72 is linked to the push rod locking gear 712.

[0031] As described above, a children's stroller frame that can be retracted and extended in a coordinated manner includes a push rod unlocking mechanism 72 comprising a push rod unlocking operation member 721 movably disposed on a push rod assembly 7 and a push rod unlocking rotating block 723 rotatably disposed between the lower end of the push rod assembly 7 and a push rod locking gear 712 and used to slide with the push rod locking gear 712. The push rod unlocking rotating block 723 and the push rod unlocking operation member 721 are linked through a push rod unlocking linkage member 722.

[0032] As described above, a child stroller frame that can be retracted and extended in a coordinated manner includes a push rod assembly 7 comprising a lower push rod 75 whose lower end is hinged to the upper end of the rear leg 2 at a pivot K, and an upper push rod 76 that is retractably connected to the inner cavity of the lower push rod 75. An upper push rod locking assembly 77 is provided between the upper push rod 76 and the lower push rod 75 for locking the upper push rod 76 relative to the lower push rod 75. An upper push rod unlocking assembly 78 is provided on the upper push rod 76 and is linked to the upper push rod locking assembly 77.

[0033] As described above, in a child stroller frame that can be retracted and extended in a coordinated manner, the inner wall of the lower push rod 75 is provided with a mounting strip 751; the upper push rod locking assembly 77 includes an upper push rod locking part 771 provided on the mounting strip 751 and an upper push rod locking member 772 movably provided on the upper push rod 76 and locked in cooperation with the upper push rod locking part 771, and when the upper push rod locking member 772 is locked in cooperation with the upper push rod locking part 771, the locking end of the upper push rod locking member 772 is always restricted to the inner wall of the upper push rod 76; the upper push rod locking member 772 is linked with the upper push rod unlocking assembly 78.

[0034] Compared with the prior art, the present invention has the following advantages:

[0035] 1. This utility model uses a sliding seat that slides along a single axis of the rear leg to trigger the frame linkage components to synchronously drive the front leg, seat, and backrest to fold together. Therefore, users only need to push or pull the sliding seat to complete the unfolding and folding of the stroller frame, simplifying the operation process and improving the convenience of operation. It is especially suitable for users to quickly fold the stroller when holding a baby with one hand.

[0036] 2. This utility model uses a sliding seat to slide along a single axis to cooperate with the frame linkage assembly to coordinate the front leg bar, seat bar, and backrest bar, ensuring that the front leg bar, seat bar, and backrest bar can be retracted and extended smoothly.

[0037] 3. When the stroller frame is folded up, the front leg post, seat post, and backrest post are aligned with the rear leg post, making the stroller frame more regular and compact when folded, which makes it easier to put into a backpack or car trunk and improves portability.

[0038] 4. In order to make the structure of this utility model more compact and simple, the upper end of the rear foot rod, the lower end of the backrest rod, and the lower end of the push rod assembly are rotatably connected around the same pivot.

[0039] 5. To ensure smooth and stable extension and retraction of the backrest and front leg, the upper linkage, backrest, sliding seat, and rear leg are connected to form a crank-slider mechanism; the lower linkage, front leg, sliding seat, and rear leg are connected to form a crank-slider mechanism.

[0040] 6. In this new type of bicycle, the guide slide is built into the inside of the rear foot bar, and the frame linkage assembly, seat bar, and armrest connecting bar are all built into the inside of the bicycle frame. That is, there is no protruding structure on the outside of the bicycle frame, which makes the overall external outline of the folded bicycle frame neater and simpler, in line with the current trend of simplified design of bicycle frames.

[0041] 7. The push rod assembly has a forward pushing mode that extends from front to back and upward and a backward pushing mode that extends from back to front and upward during its rotation stroke. The push rod locking mechanism is configured to lock the push rod assembly in either the forward pushing mode or the backward pushing mode, which can meet the different needs of users for forward and reverse pushing and improve practicality.

[0042] 8. In this utility model, the forward blocking component is located between the backrest rod and the push rod assembly, which can improve the connection stability between the backrest rod and the push rod assembly, and also play a role in precise positioning; the reverse blocking component is located between the rear foot rod and the push rod assembly, which can improve the connection stability between the rear foot rod and the backrest assembly, and also play a role in precise positioning, making it easy for the push rod locking mechanism to lock.

[0043] 9. By assembling the upper push rod locking part onto the mounting strip that is relatively fixedly installed on the inner wall of the lower push rod cavity, the engagement between the upper push rod locking part and the upper push rod locking component occurs entirely within the inner cavity of the lower push rod. Furthermore, the locking end of the upper push rod locking component is always restricted to the inner cavity of the lower push rod. This makes the overall external structure of the push rod assembly neater and simpler, and keeps the outer surface of the lower push rod hygienic and clean. In addition, it also prevents external objects from interfering with the engagement between the upper push rod locking component and the upper push rod locking part, ensuring smooth locking. [Attached Image Description]

[0044] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings, wherein:

[0045] Figure 1 This is one of the perspective views of the present invention in its unfolded and usable state.

[0046] Figure 2 This is the second perspective view of the present invention in its unfolded and usable state.

[0047] Figure 3 This is one of the side views of the present invention in its unfolded and usable state.

[0048] Figure 4 This is the second side view of the present invention in its unfolded and usable state.

[0049] Figure 5 This is a perspective view of the present invention in its folded and used state.

[0050] Figure 6 This is a side view of the present invention in its folded and used state.

[0051] Figure 7 This is one of the exploded views of the backrest rod locking mechanism and the push rod locking mechanism in this utility model.

[0052] Figure 8 This is the second exploded view of the backrest rod locking mechanism and the push rod locking mechanism in this utility model.

[0053] Figure 9 This is one of the exploded views of the push rod assembly in this utility model.

[0054] Figure 10 This is the second exploded view of the push rod assembly in this utility model.

[0055] Figure 11 This is a cross-sectional view of the push rod assembly in this utility model.

[0056] Figure 12 This is a perspective view of the push rod assembly in the backward pushing mode of this utility model.

Detailed Implementation Methods

[0057] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0058] like Figure 1-12As shown, this utility model discloses a children's bicycle frame that can be coordinated and extended / retracted, and can be switched between extended and folded states. It includes a front leg post 1, a rear leg post 2, a seat post 3, a backrest post 4, a sliding seat 50, and a frame linkage assembly 5. The lower end of the front leg post 1 is connected to a front wheel assembly 10. The upper end of the rear leg post 2 is hinged to the upper end of the front leg post 1 at pivot A, and the lower end of the rear leg post 2 is connected to a rear wheel assembly 20. The front or middle part of the seat post 3 is rotatably and slidably connected to the rear leg post 2. The lower end of the backrest post 4 is hinged to the upper end of the rear leg post 2 at pivot B. The sliding seat 50 is directly or indirectly disposed on the rear leg post 2 and can slide along its axial direction. The frame linkage assembly 5 is located between the front leg post 1, seat post 3, backrest post 4, and sliding seat 50, and is configured such that when the sliding seat 50 slides downward along the rear leg post 2, the front leg post 1, seat post 3, and backrest post 4 are folded accordingly. Preferably, the frame linkage assembly 5 is configured such that when the sliding seat 50 slides downward along the rear leg 2, it links the front leg 1, seat leg 3, and backrest leg 4 to fold towards the rear leg 2. During the folding process, the user operates the backrest leg unlocking mechanism to unlock the backrest leg locking mechanism, thereby releasing the backrest leg from its locking position relative to the rear leg. This causes the backrest leg to flip backward and downward, folding towards the rear leg. The backrest, through the frame linkage assembly and the sliding seat, coordinates with the front leg to fold towards the rear leg and with the seat leg to fold backward and downward towards the inside of the rear leg, thus completing the overall folding of the children's bicycle frame. The operation is convenient, and the folding is smooth and stable.

[0059] This invention uses a sliding seat that slides along a single axis of the rear leg to trigger the frame linkage components to synchronously drive the front leg, seat, and backrest to fold together. Therefore, users only need to push or pull the sliding seat to complete the unfolding and folding of the stroller frame, simplifying the operation process and improving the convenience of use. It is especially suitable for users to quickly fold the stroller when holding a child with one hand.

[0060] In the folding process, the front leg bar rotates backward to fold, and the backrest bar rotates backward and downward to fold, that is, the backrest bar rotates forward to fold, so that the front leg bar and the backrest bar move closer together to fold, ensuring that the overall center of gravity of the children's bicycle frame is at or close to the rear leg bar during the folding process, and avoiding the children's bicycle frame from tipping forward during the folding process.

[0061] like Figure 1-6As shown, for convenient folding and unfolding, an armrest connecting rod 6 connected to the armrest bar 60 is also included. The front or middle part of the armrest connecting rod 6 is rotatably and slidably connected to the lower part of the backrest bar 4. The frame linkage assembly 5 is also configured to fold the armrest connecting rod 6 accordingly when the sliding seat 50 slides down along the rear foot bar 2. Specifically, the frame linkage assembly 5 includes an upper linkage member 51 and a lower linkage member 52; the upper end of the upper linkage member 51 is hinged to the backrest bar 4 at pivot C, the middle or lower part of the upper linkage member 51 is hinged to the seat bar 3 at pivot D, and the lower end of the upper linkage member 51 is hinged to the sliding seat 50 at pivot E; the rear end of the lower linkage member 52 is hinged to the sliding seat 50 at pivot F, and the front end of the lower linkage member 52 is hinged to the front foot bar 1 at pivot G; the rear end of the armrest connecting rod 6 is hinged to the middle or lower part of the upper linkage member 51 at pivot H. In this embodiment, pivots E and F are coaxially arranged, and pivots D and H are coaxially arranged, resulting in a compact and simple structure. During the folding process, the user operates the backrest rod unlocking mechanism in conjunction with the backrest rod locking mechanism to release the locking state of the backrest rod relative to the rear leg rod, causing the backrest rod to flip backward and downward and fold towards the rear leg rod. The backrest rod drives the sliding seat 50 to slide downward along the axis of the rear leg rod 2 through the upper linkage 51. That is, the sliding seat 50, through the upper linkage 51, coordinates with the armrest connecting rod 6 and the seat rod 2 to fold backward and downward towards the inside of the rear leg rod, and the sliding seat 50, through the lower linkage 52, coordinates with the front leg rod to fold towards the rear leg rod, thereby completing the overall folding operation of the stroller frame.

[0062] like Figure 5 , 6 As shown, when the stroller frame is in the folded state, the handlebar 60 is positioned upwards for easy lifting and use by the user.

[0063] like Figure 1-6 As shown, in order to ensure that the backrest and front leg rods retract smoothly, the upper linkage 51, backrest rod 4, sliding seat 50, and rear leg rod 2 are connected to form a crank-slider mechanism; the lower linkage 52, front leg rod 1, sliding seat 50, and rear leg rod 2 are connected to form a crank-slider mechanism.

[0064] like Figure 1-7 As shown, the backrest rod 4 is provided with an armrest connecting seat 61. The armrest connecting seat 61 is hinged to the backrest rod 4 at pivot I located between pivot B and pivot C. An armrest hole sleeve 62 is fixedly connected to the armrest connecting seat 61, and the armrest connecting rod 6 is slidably inserted into the armrest hole sleeve 62. The armrest hole sleeve 62 guides and limits the armrest connecting rod 6, restricting it to slide only in a set direction, avoiding wobbling or deviation of the armrest connecting rod during the opening and closing process, and ensuring smooth and stable opening and closing.

[0065] like Figure 1-6As shown, the inner side of the rear footrest 2 is provided with a guide slide rod 21 extending along its axial direction, and the sliding seat 50 is slidably connected to the guide slide rod 21. This guide slide rod is built into the inner side of the rear footrest, and the frame linkage assembly, seat rod, and armrest connecting rod are all built into the inner side of the child bicycle frame. That is, there are no protruding structures on the outer side of the child bicycle frame, making the overall external outline of the folded child bicycle frame neater and simpler, conforming to the current trend of simplified design for child bicycle frames. It also prevents the sliding seat from being interfered with by external objects or users, ensuring smooth and stable sliding, and providing a certain degree of protection for the sliding seat.

[0066] like Figure 1-6 As shown, the two sliding seats 50 are connected synchronously by a transverse connecting rod 501, which can ensure that the two sliding seats slide synchronously, avoid jamming, and effectively improve the connection stability between the two rear foot rods, ensuring stable and reliable deployment.

[0067] like Figure 1-6 As shown, the upper end of the rear leg 2 is provided with a seat connecting seat 22, and a seat hole sleeve 221 is hinged to the seat connecting seat 22 via a pivot J. The seat rod 3 is slidably inserted into the seat hole sleeve 221. The seat hole sleeve 221 guides and limits the seat rod 3, restricting it to slide only in a set direction, preventing the seat rod 3 from shaking or shifting during the folding and unfolding process, and ensuring smooth and stable folding and unfolding.

[0068] like Figure 1-8As shown, to ensure reliable locking and easy unlocking of the backrest rod relative to the rear leg rod, a backrest rod locking mechanism 41 is provided between the backrest rod 4 and the rear leg rod 2 for locking the backrest rod 4 relative to the rear leg rod 2. A backrest rod unlocking mechanism 42, which is linked to the backrest rod locking mechanism 41, is provided on the backrest rod 4. Specifically, the backrest rod locking mechanism 41 includes a backrest rod locking tooth groove 411 located on opposite sides of the lower end of the backrest rod 4 and the upper end of the rear leg rod 2, and a backrest rod locking gear 412 slidably located between the lower end of the backrest rod 4 and the upper end of the rear leg rod 2, capable of simultaneously engaging the backrest rod locking tooth groove 411 at both ends. A backrest rod locking elastic element 413 is provided between the backrest rod locking gear 412 and the upper end of the rear leg rod 2 for elastically resetting the backrest rod locking gear 412. The backrest rod unlocking mechanism... The backrest rod unlocking mechanism 42 is linked with the backrest rod locking gear 412; the backrest rod unlocking mechanism 42 includes a backrest rod unlocking rotating block 423 rotatably disposed between the lower end of the backrest rod 4 and the backrest rod locking gear 412 for pushing the backrest rod locking gear 412 to slide; the backrest rod unlocking mechanism 42 also includes a backrest rod unlocking operating member 421 movably disposed on the backrest rod 4 and a backrest rod unlocking linkage member 422 passing through the backrest rod 4 and connected to the backrest rod unlocking operating member 421 and the backrest rod unlocking rotating block 423 respectively. When unlocking, the user operates the backrest unlocking mechanism 421 to move relative to the backrest. The backrest unlocking mechanism 421 is linked to the backrest unlocking rotating block 423 to rotate accordingly through the backrest unlocking linkage 422. At this time, the backrest unlocking rotating block 423, with the cooperation of the two backrest unlocking inclined walls 4231 set on the backrest unlocking rotating block 423 and the lower end of the backrest 4, pushes the backrest locking gear 412 to slide towards the rear foot bar 2, so that the backrest locking gear 412 separates from the backrest locking tooth groove 411 at the lower end of the backrest 4, thereby releasing the locking state of the backrest 4 relative to the rear foot bar 2.

[0069] like Figure 1-12 As shown, in order to facilitate user operation, a push rod assembly 7 is also included. The lower end of the push rod assembly 7 is hinged to the upper end of the rear leg 2 at a pivot K. A push rod locking mechanism 71 is provided between the lower end of the push rod assembly 7 and the upper end of the rear leg 2 for locking the push rod assembly 7 relative to the rear leg 2. A push rod unlocking mechanism 72 is provided on the push rod assembly 7 and is linked to the push rod locking mechanism 71.

[0070] like Figure 1-12As shown, to meet the different needs of users for forward and reverse pushing and improve practicality, the push rod assembly 7 has a forward pushing mode that extends from front to back and upward, and a rearward pushing mode that extends from back to front and upward, in its rotation stroke. The push rod locking mechanism 71 is configured to lock the push rod assembly 7 in either the forward pushing mode or the rearward pushing mode. When the child bike frame is in the forward pushing mode, the front wheel assembly is a swivel wheel assembly and the rear wheel assembly is a fixed wheel assembly; when the child bike frame is in the rearward pushing mode, the front wheel assembly is a fixed wheel assembly and the rear wheel assembly is a swivel wheel assembly.

[0071] like Figure 1-12 As shown, the stroller frame is equipped with a forward blocking component 73 for blocking and limiting the push rod assembly 7 when it is in the forward pushing mode, and a reverse blocking component 74 for blocking and limiting the push rod assembly 7 when it is in the backward pushing mode. Specifically, the forward blocking component 73 is located between the backrest rod 4 and the push rod assembly 7, and includes a first forward blocking member 731 on the backrest rod 4 and a second forward blocking member 732 on the backrest assembly for blocking and cooperating with the first forward blocking member 731; the reverse blocking component 74 is located between the rear leg bar 2 and the push rod assembly 7, and includes a first reverse blocking member 741 on the upper end of the rear leg bar 2 and a second reverse blocking member 742 on the push rod assembly 7 for blocking and cooperating with the first reverse blocking member 741. In this embodiment, the forward blocking component is located between the backrest rod and the push rod assembly, which can improve the connection stability between the backrest rod and the push rod assembly, and also play a role in precise positioning; the reverse blocking component is located between the rear foot rod and the push rod assembly, which can improve the connection stability between the rear foot rod and the backrest assembly, and also play a role in precise positioning, making it easy for the push rod locking mechanism to lock.

[0072] like Figure 1-12As shown, for reliable locking and convenient unlocking, the push rod locking mechanism 71 includes a push rod locking tooth groove 711 located on opposite sides of the upper end of the rear leg 2 and the lower end of the push rod assembly 7, and a push rod locking gear 712 slidably located between the upper end of the rear leg 2 and the lower end of the push rod assembly 7, which can simultaneously engage with the push rod locking tooth groove 711 of the upper end of the rear leg 2 and the lower end of the push rod assembly 7. A push rod locking elastic element 713 is provided between the push rod locking gear 712 and the upper end of the rear leg 2 for driving the push rod locking gear 712 to elastically reset. The push rod unlocking mechanism 72 is linked to the push rod locking gear 712. The push rod unlocking mechanism 72 includes a push rod unlocking operating member 721 movably mounted on the push rod assembly 7 and a push rod unlocking rotating block 723 rotatably mounted between the lower end of the push rod assembly 7 and the push rod locking gear 712, and for sliding with the push rod locking gear 712. The push rod unlocking rotating block 723 and the push rod unlocking operating member 721 are linked by a push rod unlocking linkage member 722. During unlocking, the push rod unlocking operating member 721 slides upward relative to the push rod assembly. The push rod unlocking operating member 721, through the push rod unlocking linkage member 722, drives the push rod unlocking rotating block 723 to rotate accordingly. With the cooperation of the two push rod unlocking inclined portions 7231 located at the lower end of the push rod assembly 723 and the push rod unlocking rotating block 723, the push rod locking gear 712 is pushed to slide towards the rear foot rod 2 and separates from the push rod locking tooth groove 711 at the lower end of the push rod assembly 7, thereby releasing the locking state of the push rod assembly 7 relative to the rear foot rod 2.

[0073] In some embodiments, the push rod locking gear 712 is configured to lock into the push rod locking groove 711 whether the push rod assembly is in a forward pushing mode or a backward pushing mode, resulting in a simple structure.

[0074] like Figure 1-12 As shown, in this embodiment, the push rod locking gear 712 is configured to engage with the push rod locking groove 711 when the push rod assembly is in the rearward pushing mode. The push rod locking mechanism 71 also includes a forward locking member 714 provided on the backrest rod 4 and a forward sliding sleeve 715 slidably provided on the push rod assembly 7. The forward sliding sleeve 715 is provided with a forward locking part 716 for engaging with the forward locking member 714 when the push rod assembly is in the forward pushing mode. The forward sliding sleeve 715 is linked with the push rod unlocking operation member 721 through the push rod unlocking linkage member 722. When the push rod assembly is released from its locked state relative to the rear foot lever in the forward push mode, the push rod unlocking operation 721 slides upward relative to the push rod assembly. The push rod unlocking operation 721 drives the forward sliding sleeve 715 to slide upward through the push rod unlocking linkage 722, causing the forward locking part 716 to separate from the forward locking part 714. At this time, the push rod assembly can be operated to rotate in the direction of the front foot lever. When the push rod assembly is in the backward push mode, the push rod locking gear 712 and the push rod locking groove 711 lock together to lock the push rod assembly relative to the rear foot lever.

[0075] like Figure 1 As shown, the user can only reverse or fold the push rod assembly by simultaneously operating the push rod unlocking operation 721 on both sides to release the locking state of the push rod locking mechanism 71 on both sides, thus avoiding misoperation and ensuring safe and reliable use.

[0076] like Figure 9-11 As shown, the forward sliding sleeve 715 is movably connected to the forward slider 717 located inside the lower push rod 75. The push rod unlocking operation component 721 is connected to the forward slider 717 via the push rod unlocking linkage component 722, and the forward slider 717 is then connected to the push rod unlocking rotating block 723 via the push rod unlocking linkage component 722. A spring is provided between the forward slider 717 and the lower push rod 75.

[0077] In this invention, before the push rod assembly can be folded, the backrest arm must be folded first to release the obstruction of the forward blocking component 73. Only then can the push rod assembly be folded backward, downward, and towards the rear foot arm. In the folded state, the upper end of the push rod assembly abuts against the support surface along with both the front and rear wheel assemblies. Figure 6 As shown; and the two front wheel sets are folded between the inner sides of the two rear wheel sets, resulting in a compact structure and a neat and simple overall external structure.

[0078] like Figure 1-6 As described in 9-12, in order to facilitate the use of users of different heights and improve the flexibility of use, the push rod assembly 7 includes a lower push rod 75 whose lower end is hinged to the upper end of the rear foot rod 2 at a pivot K and an upper push rod 76 which is telescopically connected to the inner cavity of the lower push rod 75. An upper push rod locking assembly 77 is provided between the upper push rod 76 and the lower push rod 75 for locking the upper push rod 76 relative to the lower push rod 75. An upper push rod unlocking assembly 78 is provided on the upper push rod 76 and is linked to the upper push rod locking assembly 77.

[0079] like Figure 9-12The lower push rod 75 has a mounting strip 751 fixedly provided on the inner wall of the cavity; the upper push rod locking assembly 77 includes an upper push rod locking part 771 provided on the mounting strip 751 and an upper push rod locking member 772 movably provided on the upper push rod 76 and locked in cooperation with the upper push rod locking part 771. When the upper push rod locking member 772 is locked in cooperation with the upper push rod locking part 771, the locking end of the upper push rod locking member 772 is always restricted to the inner cavity side of the upper push rod 76; the upper push rod locking member 772 is linked with the upper push rod unlocking assembly 78. By converging the upper push rod locking part onto the mounting strip that is relatively fixedly installed on the inner wall of the lower push rod cavity, the engagement between the upper push rod locking element and the upper push rod locking part occurs entirely within the inner cavity of the lower push rod. Furthermore, the locking end of the upper push rod locking element is always restricted to the inner cavity of the lower push rod. This results in a neater and simpler overall external structure of the push rod assembly, keeping the outer surface of the lower push rod hygienic and clean. Additionally, it prevents external objects from interfering with the engagement between the upper push rod locking element and the upper push rod locking part, ensuring smooth locking.

[0080] like Figure 1-6 As shown in Figures 9-11, the upper push rod unlocking assembly 78 includes, but is not limited to, an upper push rod unlocking slider 781 slidably disposed within the upper push rod 76. The upper push rod unlocking slider 781 is linked with the upper push rod locking member 772. An upper push rod unlocking operation member 783 is provided on the upper part of the upper push rod 76. The upper push rod unlocking operation member 783 is linked with the upper push rod unlocking slider 781 through the upper push rod unlocking linkage member 782. During unlocking, the upper push rod unlocking operation member 783 is operated to move relative to the upper push rod 76. The upper push rod unlocking operation member 783 drives the upper push rod unlocking slider 781 to slide upward relative to the upper push rod 76 through the upper push rod unlocking linkage member 782. At this time, the unlocking inclined wall and unlocking rod located between the upper push rod unlocking slider 781 and the upper push rod locking member 772 cooperate with each other to drive the upper push rod locking member 772 to separate from the upper push rod locking part 771.

Claims

1. A children's bicycle frame that can be deployed and folded in a coordinated manner, capable of switching between an deployed state and a folded state, characterized in that... include: Front foot stick (1), the lower end of which is connected to the front wheel assembly (10); Rear foot rod (2), the upper end of the rear foot rod (2) is hinged to the upper end of the front foot rod (1) at pivot A, and the lower end of the rear foot rod (2) is connected to the rear wheel assembly (20); Seat rod (3), the front or middle part of which is rotatably and slidably connected to the rear foot rod (2); Backrest rod (4), the lower end of which is hinged to the upper end of the rear leg rod (2) at pivot B; A sliding seat (50) is directly or indirectly provided on the rear foot rod (2) and can slide along its axial direction; The frame linkage assembly (5) is located between the front leg bar (1), the seat bar (3), the backrest bar (4) and the sliding seat (50). It is configured such that when the sliding seat (50) slides down along the rear leg bar (2), the front leg bar (1), the seat bar (3) and the backrest bar (4) are moved closer to the rear leg bar (2) and folded together accordingly.

2. The child bicycle frame that can be retracted and extended in a coordinated manner according to claim 1, characterized in that... The frame linkage assembly (5) includes an upper linkage component (51) and a lower linkage component (52); The upper end of the upper linkage (51) is hinged to the backrest rod (4) at pivot C, the middle or lower part of the upper linkage (51) is hinged to the seat rod (3) at pivot D, and the lower end of the upper linkage (51) is hinged to the sliding seat (50) at pivot E. The upper linkage (51), backrest rod (4), sliding seat (50), and rear foot rod (2) are connected to form a crank-slider mechanism. The rear end of the lower linkage (52) is hinged to the sliding seat (50) at pivot F, and the front end of the lower linkage (52) is hinged to the front foot rod (1) at pivot G. The lower linkage (52), the front foot rod (1), the sliding seat (50), and the rear foot rod (2) are connected to form a crank-slider mechanism.

3. The child bicycle frame that can be retracted and extended in a coordinated manner according to claim 1, characterized in that... It also includes a handrail connecting rod (6) connected to a handrail bar (60), the front or middle part of which is rotatably and slidably connected to the lower part of the backrest bar (4), and the frame linkage assembly (5) is also configured to fold the handrail connecting rod (6) accordingly when the sliding seat (50) slides down along the rear foot bar (2).

4. The child bicycle frame that can be retracted and extended in a coordinated manner according to claim 3, characterized in that... The frame linkage assembly (5) includes an upper linkage component (51) and a lower linkage component (52); The upper end of the upper linkage (51) is hinged to the backrest rod (4) at pivot C, the middle or lower part of the upper linkage (51) is hinged to the seat rod (3) at pivot D, and the lower end of the upper linkage (51) is hinged to the sliding seat (50) at pivot E. The upper linkage (51), backrest rod (4), sliding seat (50), and rear foot rod (2) are connected to form a crank-slider mechanism. The rear end of the lower linkage (52) is hinged to the sliding seat (50) at pivot F, and the front end of the lower linkage (52) is hinged to the front leg rod (1) at pivot G. The lower linkage (52), the front leg rod (1), the sliding seat (50), and the rear leg rod (2) are connected to form a crank-slider mechanism. The rear end of the handrail connecting rod (6) is hinged to the middle or lower part of the upper linkage (51) at pivot H.

5. The child bicycle frame that can be retracted and extended in a coordinated manner according to claim 4, characterized in that... The backrest rod (4) is provided with an armrest connecting seat (61), and the armrest connecting seat (61) and the backrest rod (4) are hinged to pivot I located between pivot B and pivot C. An armrest hole sleeve (62) is fixedly connected to the armrest connecting seat (61), and the armrest connecting rod (6) is slidably inserted into the armrest hole sleeve (62).

6. The child bicycle frame that can be retracted and extended in a coordinated manner according to claim 1, characterized in that... The inner side of the rear foot rod (2) is provided with a guide slide rod (21) extending along its axis, and the sliding seat (50) is slidably connected to the guide slide rod (21); the two sliding seats (50) are connected to each other by a transverse connecting rod (501).

7. The child bicycle frame that can be retracted and extended in a coordinated manner according to claim 1, characterized in that... The upper end of the rear leg (2) is provided with a seat connecting seat (22), and a seat hole sleeve (221) is hinged to the seat connecting seat (22) via a pivot J. The seat rod (3) is slidably inserted into the seat hole sleeve (221).

8. The child bicycle frame that can be retracted and extended in a coordinated manner according to claim 1, characterized in that... A backrest locking mechanism (41) is provided between the backrest rod (4) and the rear leg rod (2) for locking the backrest rod (4) relative to the rear leg rod (2), and a backrest unlocking mechanism (42) is provided on the backrest rod (4) in conjunction with the backrest locking mechanism (41).

9. A child bicycle frame that can be retracted and extended in coordination according to any one of claims 1-8, characterized in that... It also includes a push rod assembly (7), the lower end of which is hinged to the upper end of the rear leg rod (2) at pivot K. A push rod locking mechanism (71) for locking the push rod assembly (7) relative to the rear leg rod (2) is provided between the lower end of the push rod assembly (7) and the upper end of the rear leg rod (2). A push rod unlocking mechanism (72) linked with the push rod locking mechanism (71) is provided on the push rod assembly (7). The push rod assembly (7) has a forward-pushing extension that tilts upward from front to back during its rotation stroke. The stroller frame is equipped with a forward pushing mode and a backward pushing mode that extends from back to front and upward. The push rod locking mechanism (71) is configured to lock the push rod assembly (7) in either the forward pushing mode or the backward pushing mode. The stroller frame is provided with a forward blocking assembly (73) for blocking and limiting the push rod assembly (7) when it is in the forward pushing mode and a reverse blocking assembly (74) for blocking and limiting the push rod assembly (7) when it is in the backward pushing mode.

10. A child bicycle frame that can be retracted and extended in a coordinated manner according to claim 9, characterized in that... The push rod locking mechanism (71) includes a push rod locking groove (711) located on opposite sides of the upper end of the rear leg (2) and the lower end of the push rod assembly (7), and a push rod locking gear (712) slidably located between the upper end of the rear leg (2) and the lower end of the push rod assembly (7) and simultaneously engaging the push rod locking groove (711) of the upper end of the rear leg (2) and the lower end of the push rod assembly (7). A push rod locking elastic element (713) for driving the push rod locking gear (712) to elastically reset is provided between the push rod locking gear (712) and the upper end of the rear leg (2). The push rod unlocking mechanism (72) is linked to the push rod locking gear (712).

11. The child bicycle frame that can be retracted and extended in a coordinated manner according to claim 10, characterized in that... The push rod unlocking mechanism (72) includes a push rod unlocking operation member (721) movably disposed on the push rod assembly (7) and a push rod unlocking rotating block (723) rotatably disposed between the lower end of the push rod assembly (7) and the push rod locking gear (712) and used to slide with the push rod locking gear (712). The push rod unlocking rotating block (723) and the push rod unlocking operation member (721) are linked through a push rod unlocking linkage member (722).

12. The child bicycle frame that can be retracted and extended in a coordinated manner according to claim 9, characterized in that... The push rod assembly (7) includes a lower push rod (75) whose lower end is hinged to the upper end of the rear foot rod (2) at a pivot K and an upper push rod (76) which is telescopically connected to the inner cavity of the lower push rod (75). An upper push rod locking assembly (77) for locking the upper push rod (76) relative to the lower push rod (75) is provided between the upper push rod (76) and the lower push rod (75). An upper push rod unlocking assembly (78) that is linked to the upper push rod locking assembly (77) is provided on the upper push rod (76).

13. The child bicycle frame that can be retracted and extended in a coordinated manner according to claim 12, characterized in that... The inner wall of the lower push rod (75) is fixedly provided with a mounting strip (751); the upper push rod locking assembly (77) includes an upper push rod locking part (771) provided on the mounting strip (751) and an upper push rod locking member (772) movably provided on the upper push rod (76) and locked in cooperation with the upper push rod locking part (771). When the upper push rod locking member (772) is locked in cooperation with the upper push rod locking part (771), the locking end of the upper push rod locking member (772) is always restricted to the inner wall of the upper push rod (76); the upper push rod locking member (772) is linked with the upper push rod unlocking assembly (78).

Images