Multifunctional frame

Abstract

A lower seat connecting frame is used for being connected with at least one seat frame, the lower seat connecting frame is transversely arranged in the front-back direction in the unfolded use state, and when the lower seat connecting frame is folded, a user only needs to operate a frame folding unlocking mechanism to be in linkage with a frame locking mechanism to release the locking state of the frame; the front foot rod, the rear foot rod and the push rod assembly can be drawn close to and folded towards the lower seat connecting frame, so that the folded whole vehicle is more compact in structure, the size is minimized, and the carrying and storage requirements of a user are met; the lower seat connecting frame transversely arranged in the front-back direction can be used for being connected with the seat frame to serve as a stroller frame and can also be used for carrying a shopping basket, a vegetable basket or other objects to serve as a common stroller frame when not connected with the seat frame, and therefore the multifunctional stroller has the advantage of being multifunctional.

Description

[Technical Field]

[0001] This utility model relates to the field of children's safety travel products, and in particular to a multi-functional vehicle frame. [Background Technology]

[0002] As living standards improve, people have increasingly higher demands for convenient travel. Therefore, the ease of folding and the size of the stroller after folding have become key concerns for consumers. More specifically, for foldable strollers, the better the interoperability of the various components, the easier the folding and unfolding process; conversely, the less efficient the folding, the more difficult it is. Regarding the size of the stroller after folding, it's desirable for it to be as small as possible for easy transport in cars, high-speed trains, and even airplanes; and when stored at home, a smaller size also saves space.

[0003] However, existing strollers, especially those with two seats, still have the following drawbacks:

[0004] 1. It cannot be fully folded. Even when folded, the stroller still takes up a large volume, which is not conducive to packaging, carrying and storing.

[0005] 2. It has a complex structure and a single function, and is only used as a children's stroller.

[0006] 3. Users need to fold several sets of parts separately, which is time-consuming and laborious.

[0007] 4. The seat frame is placed in a relatively fixed position and cannot be used in different scenarios.

[0008] Therefore, this utility model was developed to address the aforementioned problems. [Utility Model Content]

[0009] The purpose of this utility model is to overcome the shortcomings of the prior art and provide a multi-functional bicycle frame. The lower seat connecting frame is used to connect at least one frame and is arranged laterally in the front-to-back direction when unfolded. When folding, the user only needs to operate the frame folding unlocking mechanism to release the frame locking mechanism, which will allow the front leg, rear leg, and push rod assembly to fold towards the lower seat connecting frame. This makes the folded bicycle structure more compact and minimizes its size, meeting the user's carrying and storage requirements. Furthermore, the lower seat connecting frame, which is arranged laterally in the front-to-back direction, can be used as a children's bicycle frame when connected to the seat frame, or as a regular bicycle frame when not connected to the seat frame to carry shopping baskets, vegetable baskets, or other items. Therefore, it has a multi-functional feature.

[0010] To solve the above-mentioned technical problems, this utility model provides a multi-functional bicycle frame, which can be switched between an unfolded and folded usage state, comprising:

[0011] The lower seat connecting frame 1 is used to connect at least one frame 12 and is arranged laterally in the front-to-back direction when unfolded for use.

[0012] Front footrest 2, the lower end of which is connected to a front wheel assembly, and the upper part of which is movably connected to the lower seat connecting frame 1;

[0013] The rear footrest 3 has a rear wheel assembly connected to its lower end, and the middle part of the rear footrest 3 is movably connected to the lower seat connecting frame 1.

[0014] The push rod assembly 4 has its lower end directly or indirectly rotatably connected to the upper end of the front leg rod 2, and its lower part directly or indirectly rotatably connected to the upper end of the rear leg rod 3.

[0015] A frame locking mechanism 5 is provided on the frame to lock the frame in an unfolded use state;

[0016] The frame folding and unlocking mechanism 6 is installed on the frame and is used to release the frame from the locked state by the frame locking mechanism 5 so that the frame can be switched from the unfolded use state to the folded use state.

[0017] As described above, in a multi-functional frame, the push rod assembly 4 includes a push rod body 42 and an extension rod 41. The lower end of the extension rod 41 is rotatably connected to the upper end of the front leg 2. The upper end of the extension rod 41 is connected to the lower end of the push rod body 42 in an L-shaped structure. The lower part of the push rod body 42 is directly or indirectly rotatably connected to the upper end of the rear leg 3. The frame locking mechanism 5 is located between the lower end of the extension rod 41 and the upper end of the front leg 2. When the frame locking mechanism 5 is released from the locked state of the extension rod 41 and the front leg 2, the push rod body 42 rotates and folds relative to the lower seat connecting frame 1, and the front leg 2 and the rear leg 3 are folded backward and close to the lower seat connecting frame 1 respectively.

[0018] As described above, in a multi-functional frame, the frame locking mechanism 5 includes a frame locking part 51 disposed on the front leg 2, a frame locking member 52 movably disposed on the extension rod 41 and locked in cooperation with the frame locking part 51, and a frame locking elastic member 53 for elastically driving the frame locking member 52 to remain locked in cooperation with the frame locking part 51. The frame folding and unlocking mechanism 6 is disposed on the push rod assembly 4, and the frame locking member 52 is configured to be unlocked by the frame folding and unlocking mechanism 6.

[0019] As described above, a multi-functional frame includes a frame folding and unlocking mechanism 6 comprising a frame folding and unlocking component 61 movably mounted on a push rod body 42 and a frame folding and unlocking linkage component 62 passing through the extension rod 41 and the push rod body 42. One end of the frame folding and unlocking linkage component 62 is connected to the frame folding and unlocking component 61, and the other end of the frame folding and unlocking linkage component 62 is connected to the frame locking component 52.

[0020] As described above, in a multi-functional frame, a push rod adjustment seat 40 is provided between the push rod assembly 4 and the rear foot rod 3. The front part of the push rod adjustment seat 40 is fixedly connected to the extension rod 41, and the rear part of the push rod adjustment seat 40 is rotatably connected to the upper end of the rear foot rod 3. The lower end of the push rod body 42 is rotatably connected to the upper end of the extension rod 41. An angle adjustment mechanism 7 is provided between the push rod body 42 and the push rod adjustment seat 40 for adjusting the push rod body 42 to switch between the push-pull and towing states.

[0021] As described above, in a multi-functional frame, the angle adjustment mechanism 7 includes an adjustment slider 70 slidably mounted on the push rod body 42 and an adjustment slide rod 71 slidably mounted on the push rod adjustment seat 40. The upper end of the adjustment slide rod 71 is rotatably connected to the adjustment slider 70. The adjustment slide rod 71 is provided with a push adjustment locking hole 72 and a drag adjustment locking hole 73 spaced vertically apart. The angle adjustment mechanism 7 also includes an angle adjustment locking pin 74 movably mounted on the push rod adjustment seat 40 and used to lock and cooperate with the push adjustment locking hole 72 or the drag adjustment locking hole 73. One end of the angle adjustment locking pin 74 is directly or indirectly connected to an angle adjustment operating member 741. An angle adjustment elastic member 75 is provided between the angle adjustment locking pin 74 and the push rod adjustment seat 40 for driving the angle adjustment locking pin 74 to elastically reset.

[0022] As described above, in a multi-functional frame, the lower seat connecting frame 1 includes a lower seat rear link 102 and a lower seat front link 101. The lower seat front link 101 and the lower seat rear link 102 are slidably and telescopically connected. The lower seat front link 101 is configured to be able to slide and telescopically adjust relative to the lower seat rear link 102 in the unfolded use state, and / or the lower seat front link 101 is configured to slide and retract relative to the lower seat rear link 102 during the frame folding process.

[0023] As described above, in a multi-functional vehicle frame, a front connecting seat 20 is provided between the front leg 2 and the front part of the lower seat rear link 102. The lower part of the front connecting seat 20 is rotatably connected to the front leg 2, and the upper part of the front connecting seat 20 is connected to the front part of the lower seat rear link 102. The rear leg 3 is directly rotatably connected to the middle or rear part of the lower seat rear link 102, or the rear leg 3 is indirectly rotatably connected to the middle or rear part of the lower seat rear link 102 through the rear connecting seat 30. A connecting frame locking mechanism 8 and a connecting frame unlocking mechanism 9 are provided between the front connecting seat 20 and the lower seat front link 102. The connecting frame locking mechanism 8 is used to... The lower seat front link 101 is locked relative to the front connecting seat 20. The connecting frame unlocking mechanism 9 is linked to the connecting frame locking mechanism 8 to release the lock between the lower seat front link 101 and the front connecting seat 20. The connecting frame unlocking mechanism 9 is configured to unlock in the unfolded state by linking with the connecting frame locking mechanism 8, allowing the lower seat front link 101 to slide and extend relative to the lower seat rear link 102. And / or the connecting frame unlocking mechanism 9 is configured to be triggered during the folding process of the vehicle frame to unlock the connecting frame locking mechanism 8, allowing the lower seat front link 101 to slide and retract relative to the lower seat rear link 102.

[0024] As described above, in a multi-functional vehicle frame, the connecting frame locking mechanism 8 includes a connecting frame locking part 80 disposed on the lower seat front connecting rod 101 and a connecting frame locking block 81 movably disposed on the front connecting seat 20 and lockable with the connecting frame locking part 80. A connecting frame locking elastic member 82 is provided between the connecting frame locking block 81 and the front connecting seat 20 for keeping the connecting frame locking block 81 locked with the connecting frame locking part 80. The connecting frame locking block 81 is configured to be unlocked by the connecting frame unlocking mechanism 9.

[0025] As described above, in a multi-functional frame, the connecting frame unlocking mechanism 9 is located between the front connecting seat 20 and the front foot bar 2 and is configured to trigger the unlocking action of the connecting frame locking block 81 when the front foot bar 2 is flipped and folded to a preset angle. The connecting frame unlocking mechanism 9 includes a connecting frame unlocking slider 91 movably disposed on the front connecting seat 20. Both the connecting frame unlocking slider 91 and the connecting frame locking block 81 are provided with connecting frame unlocking inclined surfaces 911 that can abut against each other. A connecting frame unlocking elastic member 92 is provided between the connecting frame unlocking slider 91 and the front connecting seat 20 to drive the connecting frame unlocking slider 91 to elastically reset. The connecting frame unlocking mechanism 9 also includes a connecting frame unlocking drive member 93 disposed on the front foot bar 20 and used to drive the connecting frame unlocking slider 91 to move when the front foot bar 2 is flipped and folded to a preset angle.

[0026] As described above, in a multi-functional frame, the connecting frame unlocking mechanism 9 includes a connecting frame unlocking operation member 94, which is movably exposed in the front connecting seat 20. When the connecting frame unlocking operation member 94 is in the unfolded use state, it can directly or indirectly drive the connecting frame unlocking slider 91 to move, so as to perform the unlocking action of the connecting frame locking block 81.

[0027] As described above, in a multi-functional vehicle frame, the connecting frame unlocking mechanism 9 includes a connecting frame unlocking slider 91, a connecting frame unlocking elastic element 92, a connecting frame unlocking inclined surface 911, and a connecting frame unlocking operating element 94. The connecting frame unlocking slider 91 is movably mounted on the front connecting seat 20. The connecting frame unlocking inclined surface 911 is mounted on the connecting frame unlocking slider 91 and the connecting frame locking block 81 so as to abut against each other. The connecting frame unlocking elastic element 92 is located between the connecting frame unlocking slider 91 and the front connecting seat 20 to drive the connecting frame unlocking slider 91 to elastically reset. The connecting frame unlocking operating element 94 is movably exposed on the front connecting seat 20, and when in the unfolded use state, the connecting frame unlocking operating element 94 can directly or indirectly drive the connecting frame unlocking slider 91 to move, thereby performing the unlocking action of the connecting frame locking block 81.

[0028] As described above, a multi-functional frame also includes an upper seat connector 100 and an upper seat linkage 200. A push rod adjustment seat 40 is provided between the push rod assembly 4 and the rear footrest 3. The front part of the push rod adjustment seat 40 is fixedly connected to the extension rod 41, and the rear part of the push rod adjustment seat 40 is rotatably connected to the upper end of the rear footrest 3. The front end of the upper seat connector 100 is rotatably connected to the rear part of the push rod adjustment seat 40. The upper end of the upper seat linkage 200 is rotatably connected to the middle part of the upper seat connector 100, and the lower end of the upper seat linkage 200 is rotatably connected to the upper part of the rear footrest 3. The upper seat connector 100 is configured to be folded in a corresponding linkage when the frame is switched from an unfolded use state to a folded use state.

[0029] As described above, in a multi-functional frame, the push rod assembly 4 or the rear footrest 3 is provided with an upper seat mounting base 300. The upper seat mounting base 300 is provided with an upper seat connector 100 that can be folded or unfolded relative to the upper seat mounting base 300. A connector locking mechanism 400 is provided between the upper seat connector 100 and the upper seat mounting base 300 for locking and positioning the upper seat connector 100 relative to the upper seat mounting base 300.

[0030] As described above, in a multi-functional vehicle frame, the connecting locking mechanism 400 includes an upper seat connecting locking part 410 disposed on the upper seat connecting part 100 and an upper seat connecting locking member 420 movably disposed on the upper seat mounting base 300 and used for locking and engaging with the upper seat connecting locking part 410. The upper seat mounting base 300 is also provided with an upper seat connecting operating member 430 for driving the upper seat connecting locking member 420 to perform corresponding actions.

[0031] As described above, in a multi-functional vehicle frame, a lower seat connector 11 is connected to the lower seat rear link 102 and the lower seat front link 101. The lower seat connecting frame 1 is connected to one or two seat frames 12 via the lower seat connector 11. The lower seat connector 11 is configured to be switchable between a used state and an in-use state. The lower seat connector 11 is rotatably and adjustablely mounted on the lower seat connecting frame 1. When the lower seat connector 11 is in the used state, it is used to connect with the seat frame 12. When the lower seat connector 11 is in the in-use state, it can be rotatably adjusted to an angle that does not interfere with the lower seat connecting frame 1 for placing objects. An adjustment locking mechanism 111 is provided between the lower seat connector 11 and the lower seat connecting frame 1 to lock the lower seat connector 11 relative to the lower seat connecting frame 1.

[0032] As described above, in a multi-functional vehicle frame, a blocking and limiting mechanism 110 is provided between the lower seat front link 101 and the lower seat connector 11 located thereon. The lower seat front link 101 is slidably connected to the lower seat rear link 102 via a front connecting seat 20. A connecting frame locking mechanism 8 and a connecting frame unlocking mechanism 9 are provided between the lower seat front link 101 and the front connecting seat 20. The connecting frame locking mechanism 8 is used to lock the lower seat front link 101 relative to the front connecting seat 20. The blocking and limiting mechanism 110 is configured such that when the lower seat connector 11 located on the lower seat front link 101 is in use and the lower seat front link 101 is retracted, the blocking and limiting mechanism 110 blocks and limits the connecting frame locking mechanism 8 to lock the lower seat front link 101 relative to the lower seat rear link 102.

[0033] As described above, in a multi-functional frame, the blocking and limiting mechanism 110 is further configured such that when the lower seat connector 11 located on the lower seat front link 101 is in a non-use state and the lower seat front link 101 is retracted, the blocking and limiting mechanism 110 is released, thereby causing the connecting frame locking mechanism 8 to lock the lower seat front link 101 relative to the lower seat rear link 102.

[0034] Compared with the prior art, the multifunctional frame of this utility model has the following advantages:

[0035] 1. Users only need to operate the frame folding and unlocking mechanism in conjunction with the frame locking mechanism to release the frame from its locked state. This allows the front leg bar, rear leg bar, and push rod assembly to fold towards the lower seat connection frame, making the folded vehicle structure more compact and minimizing its size, thus meeting the user's carrying and storage requirements.

[0036] 2. In this utility model, the push rod assembly rotates relative to the lower seat connecting frame during the folding process, and the corresponding front and rear legs fold and fold towards the lower seat connecting frame. That is, the push rod assembly has the function of linking the corresponding actions of the front and rear legs, which is conducive to improving the folding and unfolding efficiency of the frame.

[0037] 3. The lower seat connecting frame of this utility model is arranged horizontally along the front and back. The lower seat connecting frame can be connected to the seat frame and used as a children's stroller frame. The connection position of the seat frame can be adjusted front and back as needed. It can also be used as a regular stroller frame when not connected to the seat frame to carry shopping baskets, vegetable baskets or other items. Therefore, it has multiple functions.

[0038] 4. In this utility model, an angle adjustment mechanism is provided between the push rod assembly and the push rod adjustment seat. Through the angle adjustment structure, the push rod body can be switched between the pushing and dragging modes, making it convenient for people to use in different scenarios and further enriching its functional diversity and convenience.

[0039] 5. In this utility model, the lower seat front link and the lower seat rear link can be slidably telescopically connected. During the folding process of the frame, after the lower seat front link is unlocked by linkage, it will automatically retract into the inner side of the frame under the action of gravity, ensuring that the frame is compact and the volume is minimized after folding, which is convenient for people to store and carry, as well as convenient for factory packaging and reduces packaging costs.

[0040] 6. The lower seat connector located on the lower seat connecting frame adopts an adjustable design, with a working state connected to the seat frame and a non-working state not connected to the seat frame. In the non-working state, the lower seat connector can be flipped to avoid interfering with the placement of shopping baskets, vegetable baskets or other items, making it convenient for people to use.

[0041] 7. In order to realize the dual-seat function and personalized adjustment, the frame of this utility model has three selectable positions for connecting the seat frame, so that the user can adjust it according to the needs of the scene.

[0042] 8. When the lower seat connector on the lower seat connecting frame is in the non-use state and the lower seat front link is retracted, the lower seat front link can be locked relative to the lower seat rear link, allowing the frame of this utility model to be converted into a regular frame, and the lower seat connecting frame to more conveniently and reliably carry corresponding items. When the lower seat connector on the lower seat connecting frame is in the use state and the lower seat front link is retracted, the user can directly pull out the seat front link relative to the lower seat rear link for use as a children's stroller frame without additional unlocking action. Therefore, it has the characteristics of versatile function, reliable structural design and convenient operation. [Attached Image Description]

[0043] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings, wherein:

[0044] Figure 1 This is one of the perspective views of Embodiment 1 of this utility model when it is in the state of being promoted and used.

[0045] Figure 2 This is a second perspective view of Embodiment 1 of this utility model in its implementation and use state.

[0046] Figure 3 This is a perspective view of Embodiment 1 of the present invention in a towing mode.

[0047] Figure 4 This is the third perspective view of Embodiment 1 of this utility model in its implementation and use state.

[0048] Figure 5 This is the fourth perspective view of Embodiment 1 of this utility model in its implementation and use state.

[0049] Figure 6 This is a side view of Embodiment 1 of the present invention in its implementation and use state.

[0050] Figure 7 This is a perspective view of Embodiment 1 of the present invention in its folded and used state.

[0051] Figure 8 This is an exploded view of the frame locking mechanism in Embodiment 1 of this utility model.

[0052] Figure 9 This is one of the exploded views of the angle adjustment mechanism in Embodiment 1 of this utility model.

[0053] Figure 10 This is the second exploded view of the angle adjustment mechanism in Embodiment 1 of this utility model.

[0054] Figure 11 This is one of the exploded views of the connecting frame locking mechanism in Embodiment 1 of this utility model.

[0055] Figure 12 This is the second exploded view of the connecting frame locking mechanism in Embodiment 1 of this utility model.

[0056] Figure 13 This is a perspective view of Embodiment 2 of the present invention in its unfolded and usable state.

[0057] Figure 14 This is one of the exploded views of Embodiment 2 of this utility model when it is in the unfolded and used state.

[0058] Figure 15 This is the second exploded view of Embodiment 2 of this utility model in its unfolded and usable state.

[0059] Figure 16 This is an exploded view of the locking mechanism of the connector in Embodiment 2 of this utility model.

[0060] Figure 17 This is a perspective view of Embodiment 2 of the present invention in its unfolded and in-use state, with some of the lower seat connecting parts in a non-use state.

[0061] Figure 18 This is one of the exploded views of the adjusting locking mechanism in Embodiment 2 of this utility model.

[0062] Figure 19 This is the second exploded view of the adjusting locking mechanism in Embodiment 2 of this utility model.

Detailed Implementation Methods

[0063] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0064] like Figure 1-19As shown, this utility model provides a multi-functional bicycle frame that can be switched between an unfolded and folded usage state. It includes a lower seat connecting frame 1, a front leg bar 2, a rear leg bar 3, a push rod assembly 4, a frame locking mechanism 5, and a frame folding and unlocking mechanism 6. The lower seat connecting frame 1 is used to connect at least one frame 12, and is arranged laterally in the front-to-back direction when in the unfolded use state; the lower end of the front leg bar 2 is connected to the front wheel assembly, and the upper part of the front leg bar 2 is movably connected to the lower seat connecting frame 1; the lower end of the rear leg bar 3 is connected to the rear wheel assembly, and the middle part of the rear leg bar 3 is movably connected to the lower seat connecting frame 1; the lower end of the push rod assembly 4 is directly or indirectly rotatably connected to the upper end of the front leg bar 2, and the lower part of the push rod assembly 4 is directly or indirectly rotatably connected to the upper end of the rear leg bar 3; the frame locking mechanism 5 is provided on the frame to lock the frame in the unfolded use state; the frame folding and unlocking mechanism 6 is provided on the frame to activate the frame locking mechanism 5 to release the locked state of the frame so that the frame can be switched from the unfolded use state to the folded use state. When folding, the user operates the frame folding unlocking mechanism 6 to release the frame locking mechanism 5, thereby releasing the locked state of the frame in the unfolded state. At this time, the front leg, rear leg, and push rod assembly can move and fold towards the lower seat connection frame side until the frame switches from the unfolded state to the folded state. Therefore, this invention can make the overall structure of the folded vehicle more compact and minimize its size, meeting the user's carrying and storage requirements.

[0065] The lower seat connecting frame of this utility model is arranged horizontally along the front and back. The lower seat connecting frame can be connected to the seat frame and used as a children's stroller frame. The connection position of the seat frame can be adjusted front and back as needed. It can also be used as a regular stroller frame when not connected to the seat frame to carry shopping baskets, vegetable baskets or other items. Therefore, it has multiple functions.

[0066] like Figure 1-7As shown in Figures 13-15 and 17, the push rod assembly 4 includes a push rod body 42 and an extension rod 41. The lower end of the extension rod 41 is rotatably connected to the upper end of the front leg 2. The upper end of the extension rod 41 is connected to the lower end of the push rod body 42 in an L-shaped structure. The lower part of the push rod body 42 is directly or indirectly rotatably connected to the upper end of the rear leg 3. The frame locking mechanism 5 is located between the lower end of the extension rod 41 and the upper end of the front leg 2. When the frame locking mechanism 5 is released from the locked state of the extension rod 41 and the front leg 2, the push rod body 42 rotates and folds relative to the lower seat connecting frame 1, and the front leg 2 and the rear leg 3 are folded backward and close to the lower seat connecting frame 1 respectively. This means that the push rod assembly has the function of linking the corresponding actions of the front leg and the rear leg, which is beneficial to improving the frame folding efficiency, simplifying the structure, reducing manufacturing costs, and improving market competitiveness. When folding, the upper part of the operating push rod body 42 flips downward and rotates towards the seat connecting frame side to fold. The upper part of the push rod body 42 flips downward and the lower part of the rear leg flips upward and moves towards the seat connecting frame side to fold. At the same time, the push rod body 42 drives the upper end of the front leg to flip forward through the extension rod 41, causing the lower part of the front leg to flip backward and move towards the seat connecting frame side to fold.

[0067] like Figure 8 As shown, in order to lock the frame more stably and reliably, the frame locking mechanism 5 is located between the lower end of the extension rod 41 and the upper end of the front foot rod 2.

[0068] like Figure 13-15 As shown in Figure 17, the lower part of the push rod body 42 is rotatably connected to the upper end of the rear foot rod 3 through the push rod support rod section, which simplifies the structure.

[0069] like Figure 1-7 As shown in Figures 13-15 and 17, to make the folded frame structure more compact and minimize its size, the push rod assembly 4 also includes an upper push rod 43 movably connected to the push rod body 42. An upper push rod locking mechanism is provided between the upper push rod 43 and the push rod body 42 to lock the upper push rod 43 relative to the push rod body 42. An upper push rod unlocking mechanism is provided on the upper push rod 43 to trigger the unlocking action of the upper push rod locking mechanism. In this embodiment, the lower end of the upper push rod 43 is slidably and telescopically connected to the upper end of the push rod body 42. During folding, the upper push rod unlocking mechanism is operated to trigger the unlocking action of the upper push rod locking mechanism, thereby releasing the locked state of the upper push rod 43 relative to the push rod body 42. Then, the upper push rod 43 can be retracted into the push rod body 42. Figure 7 As shown; during deployment, the push rod 43 extends relative to the push rod body 4 to the set length, as indicated. Figure 1-6As shown, the operation is simple and the design is reasonable, which can meet the needs of users of different heights. The upper push rod locking mechanism of this utility model includes, but is not limited to, a plurality of spaced upper push rod locking holes on the push rod body 42 and an upper push rod locking pin slidably disposed on the upper push rod 43 and insertable into the corresponding upper push rod locking hole. A pin return elastic element is provided between the upper push rod locking pin and the upper push rod 43; the upper push rod locking pin is correspondingly linked to the upper push rod unlocking mechanism to unlock. The upper push rod unlocking mechanism includes, but is not limited to, an upper push rod unlocking button movably disposed on the upper push rod 43 and an upper push rod unlocking linkage element for connecting the upper push rod unlocking button and the upper push rod locking pin.

[0070] like Figure 1-6 As shown in Figures 13 and 17, in order to ensure the stability and reliability of the frame structure and to maximize the use of space when the frame is in the unfolded state, the extension rod 41 is configured to be parallel to the rear foot rod 3 when the frame is in the unfolded state, and the connection between the front foot rod 2, the extension rod 41 and the push rod body 42 forms an inverted Z-shaped structure, and the lower seat connecting frame 1 is set horizontally.

[0071] like Figure 8 As shown, to facilitate easier locking and unlocking of the extension rod relative to the front support, the frame locking mechanism 5 includes a frame locking part 51 mounted on the front support 2, a frame locking member 52 movably mounted on the extension rod 41 and locked in cooperation with the frame locking part 51, and a frame locking elastic member 53 for elastically driving the frame locking member 52 to maintain its locked cooperation with the frame locking part 51. The frame folding and unlocking mechanism 6 is mounted on the push rod assembly 4, and the frame locking member 52 is configured to be unlocked by the frame folding and unlocking mechanism 6. In this embodiment, the frame locking member 52 is rotatably mounted on the extension rod 41 at its center, the front end of the frame locking member 52 is locked in cooperation with the frame locking part 51, the rear end of the frame locking member 52 is connected to the frame folding and unlocking linkage member 62, and the frame locking elastic member 53 is located between the rear end of the frame locking member 52 and the extension rod 41, ensuring reliable locking.

[0072] like Figure 8As shown, for ease of unlocking, the frame folding and unlocking mechanism 6 includes a frame folding and unlocking component 61 movably mounted on the push rod body 42 and a frame folding and unlocking linkage component 62 passing through the extension rod 41 and the push rod body 42. One end of the frame folding and unlocking linkage component 62 is connected to the frame folding and unlocking component 61, and the other end is connected to the frame locking component 52. During unlocking, the user operates the frame folding and unlocking component 61 relative to the push rod assembly 4. The frame folding and unlocking component 61 then drives the frame locking component 52 to move accordingly via the frame folding and unlocking linkage component 62, causing the locking end of the frame locking component 52 to separate from the frame locking part 51, thus releasing the locking state of the extension rod 41 relative to the front foot rod 2. In this embodiment, the frame folding and unlocking component 61 is slidably mounted on the push rod assembly 4.

[0073] like Figure 8 As shown, the frame locking mechanism 5 and the frame folding unlocking mechanism 6 are respectively located between the left and right front foot bars and the left and right push rod assemblies. When unlocking, only when the user operates the left and right frame folding unlocking mechanisms 6 simultaneously and the left and right frame locking mechanisms 5 are linked to unlock, can the locking state of the push rod assembly relative to the front foot bars be released. This can avoid accidental operation, play a foolproof role, and ensure safe and reliable use.

[0074] Alternatively, the locking mechanisms 5 on the left and right sides of the frame can be configured to be simultaneously linked by the frame folding and unlocking mechanism 6 to improve unlocking efficiency.

[0075] like Figure 1-7 As shown in Figures 9 and 10, to enable this utility model to have multifunctionality and multi-scenario use, and to improve the economic applicability of the frame, a push rod adjustment seat 40 is provided between the push rod assembly 4 and the rear foot rod 3. The front part of the push rod adjustment seat 40 is fixedly connected to the extension rod 41, and the rear part of the push rod adjustment seat 40 is rotatably connected to the upper end of the rear foot rod 3. The lower end of the push rod body 42 is rotatably connected to the upper end of the extension rod 41. An angle adjustment mechanism 7 is provided between the push rod body 42 and the push rod adjustment seat 40 for adjusting the push rod body 42 to switch between the pushing and dragging states. When the lower seat connecting frame is connected to the seat frame, the frame is a child frame; when not connected to the seat frame, the frame is a regular frame. Furthermore, both the child frame and the regular frame can have their push rod body angle adjusted via the angle adjustment mechanism 7 for pushing or dragging.

[0076] like Figure 9 , 10As shown, for convenient adjustment, the angle adjustment mechanism 7 includes an adjustment slider 70 slidably mounted on the push rod body 42 and an adjustment slide rod 71 slidably mounted on the push rod adjustment seat 40. The upper end of the adjustment slide rod 71 is rotatably connected to the adjustment slider 70. The adjustment slide rod 71 is provided with a push adjustment locking hole 72 and a drag adjustment locking hole 73 spaced apart vertically. The angle adjustment mechanism 7 also includes an angle adjustment locking pin 74 movably mounted on the push rod adjustment seat 40 and used to lock and cooperate with the push adjustment locking hole 72 or the drag adjustment locking hole 73. One end of the angle adjustment locking pin 74 is directly or indirectly connected to an angle adjustment operating member 741. An angle adjustment elastic member 75 is provided between the angle adjustment locking pin 74 and the push rod adjustment seat 40 for driving the angle adjustment locking pin 74 to elastically reset. During the process of adjusting the push rod body 42 from the pushing use state to the dragging use state, the angle adjustment locking pin 74 slides outward relative to the push rod adjustment seat 40 through the angle adjustment operating member 741, causing the locking end of the angle adjustment locking pin 74 to disengage from the pushing adjustment locking hole 72. Then, the push rod body 42 is pressed down, causing the push rod body 42 to flip downward around the rotation axis between the lower end of the push rod body 42 and the upper end of the extension rod 41 to the dragging use state. At this time, the dragging adjustment locking hole 73 is aligned with the locking end of the angle adjustment locking pin 74. The force on the angle adjustment operating member 741 is released, and the angle adjustment locking pin 74 elastically resets under the action of the angle adjustment elastic member 75 and inserts into the dragging adjustment locking hole 73, thereby locking the push rod body relative to the push rod adjustment seat 40 in the dragging use state.

[0077] like Figure 9 , 10 As shown, the two angle adjustment mechanisms 7 on the left and right sides are independent mechanisms. Therefore, during adjustment, the angle of the push rod body can only be adjusted by operating the two angle adjustment mechanisms 7 on the left and right sides at the same time. This can avoid misoperation, play a foolproof role, and ensure safe and reliable use.

[0078] Alternatively, the two angle adjustment mechanisms 7 on the left and right sides can be configured to be simultaneously linked by an angle adjustment unlocking component to improve unlocking efficiency.

[0079] like Figure 9 , 10As shown, in order to achieve the anti-pinch function and ensure safe and reliable use, the adjusting slide rod 71 is hollow. An anti-pinch slider 76 is slidably provided inside the adjusting slide rod 71. The anti-pinch slider 76 is provided with a pushing anti-pinch hole 761 that can be aligned and communicated with the pushing adjusting lock hole 72 and a dragging anti-pinch hole 762 that can be aligned and communicated with the dragging adjusting lock hole 73. An anti-pinch slider elastic element 77 is provided between the upper end of the anti-pinch slider 76 and the adjusting slide rod 71 for driving the anti-pinch slider 76 to elastically reset. The lower end of the anti-pinch slider 76 extends out of the outside of the adjusting slide rod 71 and can abut against the upper end of the rear foot rod 3. When the push rod body 42 switches from the pushing mode to the dragging mode, pressing down the push rod body 42 causes the adjusting slide rod 71 to drive the anti-pinch slider 76 to slide downward relative to the push rod adjusting seat 40. When the anti-pinch slider 76 slides down a certain distance, the lower end of the anti-pinch slider 76 abuts against the upper end of the rear foot rod 3, thus restricting the anti-pinch slider 76 from sliding further downward. At this moment, as the adjusting slide rod 71 continues to slide downward, the anti-pinch slider 76 slides upward relative to the adjusting slide rod 71 until the dragging anti-pinch hole 762 and the dragging adjusting lock hole 73 are aligned and connected, and the pushing anti-pinch hole 761 and the pushing adjusting lock hole 72 are misaligned.

[0080] When the push rod body 42 switches from the dragging mode to the pushing mode, the push rod body 42 is lifted, causing the adjusting slide rod 71 to drive the anti-pinch slider 76 to slide upward relative to the push rod adjusting seat 40. When the anti-pinch slider 76 slides upward a certain distance, the lower end of the anti-pinch slider 76 separates from the upper end of the rear foot rod 3. At this moment, the anti-pinch slider 76 slides downward relative to the adjusting slide rod 71 under the elastic force of the anti-pinch slider elastic element 77 until the pushing anti-pinch hole 761 and the pushing adjusting lock hole 72 are aligned and connected, and the dragging anti-pinch hole 762 and the dragging adjusting lock hole 73 are misaligned.

[0081] like Figure 9 , 10 As shown, an angle limiting structure 44 for limiting the rotation angle of the push rod body 42 is provided between the upper end of the extension rod 41 and the lower end of the push rod body 42. The angle limiting structure 44 includes, but is not limited to, a pushing blocking part 441 and a dragging blocking part 442 provided at the lower end of the push rod body 42. The angle limiting structure 44 also includes, but is not limited to, an angle blocking member 443 provided on the extension rod 41 that can be blocked and limited in conjunction with the pushing blocking part 441 or the dragging blocking part 442. That is, when the angle blocking member is blocked and engaged with the pushing blocking part, the push rod body 42 is in the pushing use state; when the angle blocking member is blocked and engaged with the dragging blocking part, the push rod body 42 is in the dragging use state. This ensures that the frame structure is stable and reliable in the pushing and dragging use states, and also ensures that the angle adjustment locking pin 74 accurately engages with the pushing adjustment locking hole 72 or the dragging adjustment locking hole 73.

[0082] like Figure 1-15As shown, in order to make the frame structure more compact and minimize its volume in the folded use state, and to facilitate unlocking, the lower seat connecting frame 1 includes a lower seat rear link 102 and a lower seat front link 101. The lower seat front link 101 is slidably and telescopically connected to the lower seat rear link 102, and the lower seat front link 101 is configured to be able to slide and telescopically adjust relative to the lower seat rear link 102 in the unfolded use state, and / or the lower seat front link 101 is configured to slide and retract relative to the lower seat rear link 102 during the frame folding process.

[0083] like Figure 1-15 As shown, for easy unlocking, a front connecting seat 20 is provided between the front footrest 2 and the front part of the lower seat rear connecting rod 102. The lower part of the front connecting seat 20 is rotatably connected to the front footrest 2, and the upper part of the front connecting seat 20 is connected to the front part of the lower seat rear connecting rod 102. The rear footrest 3 is directly rotatably connected to the middle or rear part of the lower seat rear connecting rod 102, or the rear footrest 3 is indirectly rotatably connected to the middle or rear part of the lower seat rear connecting rod 102 through the rear connecting seat 30. A connecting frame locking mechanism 8 and a connecting frame unlocking mechanism 9 are provided between the front connecting seat 20 and the lower seat front connecting rod 101. The connecting frame locking mechanism 8 is used to lock the lower seat... The front seat link 101 is locked relative to the front connecting seat 20. The connecting frame unlocking mechanism 9 is linked to the connecting frame locking mechanism 8 to release the lock between the lower seat front link 101 and the front connecting seat 20. The connecting frame unlocking mechanism 9 is configured to unlock in the unfolded state by linking with the connecting frame locking mechanism 8, allowing the lower seat front link 101 to slide and extend relative to the lower seat rear link 102. And / or the connecting frame unlocking mechanism 9 is configured to be triggered during the folding process of the vehicle frame to unlock the connecting frame locking mechanism 8, allowing the lower seat front link 101 to slide and retract relative to the lower seat rear link 102.

[0084] like Figure 1-9 As shown in Figures 13-15, both the lower seat front link 101 and the lower seat rear link 102 have a U-shaped structure. The lower seat front link 101 and the lower seat rear link are connected to form a connecting frame, and the rear end of the lower seat front link 101 and the front end of the lower seat rear link 102 are telescopically and slidably connected to ensure that the structure is stable and reliable.

[0085] like Figure 11 , 12As shown, for reliable locking, the connecting frame locking mechanism 8 includes a connecting frame locking part 80 provided on the lower seat front connecting rod 101 and a connecting frame locking block 81 movably provided on the front connecting seat 20 and lockable with the connecting frame locking part 80. A connecting frame locking elastic member 82 is provided between the connecting frame locking block 81 and the front connecting seat 20 to keep the connecting frame locking block 81 locked with the connecting frame locking part 80. The connecting frame locking block 81 is configured to be unlocked by the connecting frame unlocking mechanism 9. The lower seat front link 101 has a plurality of connecting frame locking parts 80. When the lower seat front link 101 is retracted relative to the lower seat rear link 102, the connecting frame locking block 81 locks with the corresponding connecting frame locking part 80. When the lower seat front link 101 is extended relative to the lower seat rear link 102, the connecting frame locking block 81 locks with the corresponding connecting frame locking part 80, ensuring that the lower seat front link 101 is locked whether it is in the retracted or extended state, thus ensuring reliable use.

[0086] like Figure 11 , 12 As shown in Figure -15, for ease of unlocking, the connecting frame unlocking mechanism 9 is located between the front connecting seat 20 and the front leg 2 and is configured to trigger the unlocking action of the connecting frame locking block 81 when the front leg 2 is flipped and folded to a preset angle. The connecting frame unlocking mechanism 9 includes a connecting frame unlocking slider 91 movably disposed on the front connecting seat 20. Both the connecting frame unlocking slider 91 and the connecting frame locking block 81 are provided with connecting frame unlocking inclined surfaces 911 that can abut against each other. A connecting frame unlocking elastic member 92 is provided between the connecting frame unlocking slider 91 and the front connecting seat 20 to drive the connecting frame unlocking slider 91 to elastically reset. The connecting frame unlocking mechanism 9 also includes a connecting frame unlocking drive member 93 disposed on the front leg 20 and used to drive the connecting frame unlocking slider 91 to move when the front leg 2 is flipped and folded to a preset angle. During the rotation and retraction of the front foot lever 2, the front foot lever 2 drives the connecting frame unlocking drive 93 to rotate, which in turn causes the connecting frame unlocking drive 93 to act on the slider driving ramp of the connecting frame unlocking slider 91, thereby driving the connecting frame unlocking slider 91 to slide relative to the front connecting seat 20. At this moment, the connecting frame unlocking slider 91, through the cooperation of the two connecting frame unlocking ramps 911, drives the connecting frame locking block 81 to slide downward relative to the front connecting seat 20 and separate from the connecting frame locking part 80, thereby releasing the locking state of the lower seat front link 101 relative to the front connecting seat 20. Afterwards, the lower seat front link 101 slides to the rear of the frame under its own gravity or external force and slides back into the lower seat rear link 102 or the inner side of the frame.

[0087] like Figure 13-15As shown in Figure 17, to facilitate manual operation by the user, the connecting frame unlocking mechanism 9 includes a connecting frame unlocking operation component 94. The connecting frame unlocking operation component 94 is movably exposed in the front connecting seat 20, and when the connecting frame unlocking operation component 94 is in the unfolded use state, it can directly or indirectly drive the connecting frame unlocking slider 91 to move, so as to perform the unlocking action of the connecting frame locking block 81. According to the usage requirements, the locking or unlocking of the connecting frame locking mechanism 8 can be controlled, thereby operating the lower seat front connecting rod 101 to extend or retract, satisfying diverse uses and needs.

[0088] like Figure 13-15 As shown in Figure 17, to facilitate manual operation by the user, the connecting frame unlocking mechanism 9 includes a connecting frame unlocking slider 91, a connecting frame unlocking elastic element 92, a connecting frame unlocking inclined surface 911, and a connecting frame unlocking operating element 94. The connecting frame unlocking slider 91 is movably mounted on the front connecting seat 20. The connecting frame unlocking inclined surface 911 is mounted on the connecting frame unlocking slider 91 and the connecting frame locking block 81 so as to abut against each other. The connecting frame unlocking elastic element 92 is located between the connecting frame unlocking slider 91 and the front connecting seat 20 to drive the connecting frame unlocking slider 91 to elastically reset. The connecting frame unlocking operating element 94 is movably exposed on the front connecting seat 20, and when in the unfolded use state, the connecting frame unlocking operating element 94 can directly or indirectly drive the connecting frame unlocking slider 91 to move, thereby unlocking the connecting frame locking block 81.

[0089] like Figure 1-10 As shown, for ease of folding and simplification of the structure, it also includes an upper seat connector 100 and an upper seat linkage 200. A push rod adjustment seat 40 is provided between the push rod assembly 4 and the rear foot rod 3. The front part of the push rod adjustment seat 40 is fixedly connected to the extension rod 41, and the rear part of the push rod adjustment seat 40 is rotatably connected to the upper end of the rear foot rod 3. The front end of the upper seat connector 100 is rotatably connected to the rear part of the push rod adjustment seat 40. The upper end of the upper seat linkage 200 is rotatably connected to the middle part of the upper seat connector 100, and the lower end of the upper seat linkage 200 is rotatably connected to the upper part of the rear foot rod 3. The upper seat connector 100 is configured to be folded accordingly when the frame is switched from the unfolded use state to the folded use state. In this embodiment, the upper seat connector 100 is used to connect the seat frame 12.

[0090] like Figure 13-16As shown, the push rod assembly 4 or the rear foot rod 3 is provided with an upper seat mounting base 300. The upper seat mounting base 300 is provided with an upper seat connector 100 that can be folded or unfolded relative to the upper seat mounting base 300. A connector locking mechanism 400 is provided between the upper seat connector 100 and the upper seat mounting base 300 for locking and positioning the upper seat connector 100 relative to the upper seat mounting base 300. The connector locking mechanism 400 includes an upper seat connecting locking part 410 provided on the upper seat connector 100 and an upper seat connecting locking member 420 movably provided on the upper seat mounting base 300 for locking and engaging with the upper seat connecting locking part 410. The upper seat mounting base 300 is also provided with an upper seat connecting operating member 430 for driving the upper seat connecting locking member 420 to perform corresponding actions. When unlocking, the user moves the upper seat connection operation 430 to cause the upper seat connection locking 420 to slide away from the upper seat mounting base 300, until the upper seat connection locking 420 separates from the upper seat connection locking part 410, thereby releasing the locking state of the upper seat connection 100 relative to the upper seat mounting base 300. At this time, the upper seat connection 100 can rotate, fold and close relative to the upper seat mounting base 300.

[0091] like Figure 1-19 As shown, to achieve dual-seat functionality and personalized adjustments, lower seat connectors 11 are connected to the lower seat rear link 102 and the lower seat front link 101. The lower seat connecting frame 1 connects one or two seat frames 12 via the lower seat connectors 11. In this embodiment, the specifications and dimensions of the lower seat connectors 11 located on the lower seat front link 101 and the lower seat connectors 11 located on the lower seat rear link 102 can be configured to be the same or different to meet the connection requirements of the seat frames.

[0092] To achieve the dual-seat function, the lower seat connecting frame of this utility model can connect to one or two seat frames, and the upper seat connecting piece can also connect to one seat frame accordingly. Therefore, the frame of this utility model has three selectable positions for connecting seat frames, so that users can adjust according to the needs of the scenario, which has a personalized feature.

[0093] like Figure 1-19 As shown, for ease of use, the lower seat connector 11 is configured to switch between a used state and a non-used state. The lower seat connector 11 is rotatably adjustable on the lower seat connecting frame 1. When in use, the lower seat connector 11 connects to the seat frame 12. When in a non-used state, the lower seat connector 11 can be rotatably adjusted to an angle that does not interfere with the lower seat connecting frame 1 when holding objects. An adjusting locking mechanism 111 is provided between the lower seat connector 11 and the lower seat connecting frame 1 to lock the lower seat connector 11 relative to the lower seat connecting frame 1. Figure 17As shown, shopping baskets or vegetable baskets can be placed directly on the lower seat connecting frame 1 without being interfered with by the lower seat connecting piece 11.

[0094] like Figure 18 , 19 As shown, for reliable locking, the adjusting locking mechanism 111 includes, but is not limited to, an adjusting locking recess 1111 on the lower seat front connecting rod 101 and an adjusting locking block 1112 slidably disposed on the lower seat connecting member 11 for locking engagement with the adjusting locking recess 1111. An adjusting locking elastic member 1113 is provided between the adjusting locking block 1112 and the lower seat connecting member 11 to drive the adjusting locking block 1112 to maintain its locking engagement with the adjusting locking recess 1111. For unlocking, simply operate the locking end of the adjusting locking block 1112 to disengage from the adjusting locking recess 1111; unlocking is convenient.

[0095] like Figure 18 , 19 As shown, a blocking and limiting mechanism 110 is provided between the lower seat front link 101 and the lower seat connector 11 located thereon. The lower seat front link 101 is slidably connected to the lower seat rear link 102 via the front connecting seat 20. A connecting frame locking mechanism 8 and a connecting frame unlocking mechanism 9 are provided between the lower seat front link 101 and the front connecting seat 20. The connecting frame locking mechanism 8 is used to lock the lower seat front link 101 relative to the front connecting seat 20. The blocking and limiting mechanism 110 is configured such that when the lower seat connector 11 located on the lower seat front link 101 is in use and the lower seat front link 101 is retracted, the blocking and limiting mechanism 110 blocks and limits the connecting frame locking mechanism 8 to lock the lower seat front link 101 relative to the lower seat rear link 102. The blocking and limiting mechanism 110 is further configured such that when the lower seat connector 11 located on the lower seat front link 101 is in a non-use state and the lower seat front link 101 is retracted, the blocking and limiting mechanism 110 is released, causing the connecting frame locking mechanism 8 to lock the lower seat front link 101 relative to the lower seat rear link 102. In this embodiment, when the lower seat connector located on the lower seat connecting frame is in a non-use state and the lower seat front link is retracted, the lower seat front link can be locked relative to the lower seat rear link, allowing the frame of this utility model to be converted into a conventional frame, such as... Figure 17 As shown, the lower seat connecting bracket provides a more convenient and reliable way to hold items. When the lower seat connector on the lower seat connecting bracket is in use and the lower seat front linkage is retracted, as... Figure 1 , 13 As shown, the user can directly pull out the front link of the seat relative to the rear link of the seat to use it as a stroller frame without the need for an additional unlocking action. Therefore, it has the characteristics of versatile function, reliable structural design and convenient operation.

[0096] like Figure 18 , 19 As shown, the blocking and limiting mechanism 110 includes a blocking and limiting rod 1101 slidably mounted on the lower seat front connecting rod 101 and used to prevent the connecting frame locking block 81 from engaging with the corresponding connecting frame locking part 80. A blocking and limiting elastic element 1102 is provided between the blocking and limiting rod 1101 and the lower seat front connecting rod 101 to drive the blocking and limiting rod 1101 to elastically reset. The blocking and limiting mechanism 110 also includes a blocking and pushing protrusion 1103 mounted on the lower seat connecting member 11 and used to push against the blocking and limiting rod 1101. When the lower seat connecting member 11 is in use (facing upwards), the blocking and pushing protrusion 1103 aligns with the blocking and limiting rod 1101 and pushes against the blocking and limiting rod 1101, so that the blocking end of the blocking and limiting rod 1101 is located inside the corresponding connecting frame locking part 80. Figure 18 As shown; when the seat connector 11 is rotated to the non-use state (facing downwards), the blocking push protrusion 1103 is misaligned with the blocking limit rod 1101, releasing the push on the blocking limit rod 1101. Then, under the elastic force of the limiting elastic member 1102, the blocking limit rod 1101 automatically resets, causing the blocking end of the blocking limit rod 1101 to exit the inner side of the connecting frame locking part 80. Figure 19 As shown.

[0097] like Figure 18 , 19 As shown, in order to make the lower seat connector 11 rotate smoothly, a connector guide mechanism 112 is provided between the lower seat connector 11 and the lower seat connecting frame 1 to guide the movement path of the lower seat connector 11. The connector guide mechanism 112 includes a connector guide groove 1121 and a connector guide protrusion 1122 that guides and cooperates with the connector guide arc groove 1121.

[0098] like Figure 7 As shown, in order to ensure that the frame is stable and reliable when in the standing folded use state, during the process of switching the frame from the unfolded use state to the folded use state, the upper ends of the two rear wheel assemblies and the push rod assembly 4 are simultaneously supported on the supporting ground so that the frame is in the standing folded use state.

Claims

1. A multi-functional vehicle frame, which is switchable between an unfolded use state and a folded use state, characterized in that The utility model relates to a folding bicycle frame structure, comprising: a lower seat connecting frame (1) for connecting at least one seat frame (12) arranged transversely in the front-back direction in the unfolded use state; a front leg rod (2) having a front wheel assembly connected to the lower end thereof, and the upper portion of the front leg rod (2) is movably connected to the lower seat connecting frame (1); a rear leg rod (3) having a rear wheel assembly connected to the lower end thereof, and the middle portion of the rear leg rod (3) is movably connected to the lower seat connecting frame (1); a push rod assembly (4) having the lower end thereof directly or indirectly rotatably connected to the upper end of the front leg rod (2), and the lower portion of the push rod assembly (4) is directly or indirectly rotatably connected to the upper end of the rear leg rod (3); a frame locking mechanism (5) provided on the frame for locking the frame in the unfolded use state; a frame folding unlocking mechanism (6) provided on the frame for unlocking the frame locking mechanism (5) to enable the frame to be switched from the unfolded use state to the folded use state.

2. The multi-functional vehicle frame according to claim 1, characterized by The push rod assembly (4) comprises a push rod body (42) and an extension rod (41), the lower end of the extension rod (41) is rotatably connected to the upper end of the front leg rod (2), the upper end of the extension rod (41) is connected to the lower end of the push rod body (42) to form an L-shaped structure, the lower portion of the push rod body (42) is directly or indirectly rotatably connected to the upper end of the rear leg rod (3), and the frame locking mechanism (5) is arranged between the lower end of the extension rod (41) and the upper end of the front leg rod (2) to enable the frame locking mechanism (5) to be unlocked to release the locking state of the extension rod (41) and the front leg rod (2), and after the push rod body (42) is rotated to fold, the front leg rod (2) and the rear leg rod (3) are correspondingly unlocked to be folded back and folded towards the lower seat connecting frame (1).

3. The multi-functional vehicle frame according to claim 2, characterized by The frame locking mechanism (5) comprises a frame locking portion (51) arranged on the front leg rod (2), a frame locking member (52) movably arranged on the extension rod (41) and locked with the frame locking portion (51), and a frame locking elastic member (53) for elastically driving the frame locking member (52) to be locked with the frame locking portion (51), the frame folding unlocking mechanism (6) is arranged on the push rod assembly (4), and the frame locking member (52) is configured to be unlocked by the frame folding unlocking mechanism (6).

4. The multi-functional vehicle frame according to claim 3, characterized by The frame folding unlocking mechanism (6) comprises a frame folding unlocking member (61) movably arranged on the push rod body (42) and a frame folding unlocking linkage member (62) arranged in the extension rod (41) and the push rod body (42), one end of the frame folding unlocking linkage member (62) is connected to the frame folding unlocking member (61), and the other end of the frame folding unlocking linkage member (62) is connected to the frame locking member (52).

5. The multi-functional vehicle frame according to claim 2, characterized by The push rod assembly (4) is provided with a push rod adjusting seat (40) between the push rod assembly (4) and the rear leg rod (3), the front part of the push rod adjusting seat (40) is fixedly connected with the extension rod (41), the rear part of the push rod adjusting seat (40) is rotatably connected with the upper end of the rear leg rod (3); the lower end of the push rod body (42) is rotatably connected with the upper end of the extension rod (41), and the angle adjusting mechanism (7) for adjusting the corresponding switching use of the push rod body (42) between the push rod body (42) and the push rod adjusting seat (40) is provided.

6. The multi-functional vehicle frame according to claim 5, characterized by The angle adjusting mechanism (7) comprises an adjusting sliding piece (70) slidably arranged on the push rod body (42) and an adjusting sliding rod (71) slidably arranged on the push rod adjusting seat (40), the upper end of the adjusting sliding rod (71) is rotatably connected with the adjusting sliding piece (70), and the adjusting sliding rod (71) is provided with a push adjusting lock hole (72) and a drag adjusting lock hole (73) arranged in an upper and lower interval; the angle adjusting mechanism (7) further comprises an angle adjusting lock pin (74) movably arranged on the push rod adjusting seat (40) and used for locking with the push adjusting lock hole (72) or the drag adjusting lock hole (73), one end of the angle adjusting lock pin (74) is directly or indirectly connected with an angle adjusting operating piece (741), and the angle adjusting lock pin (74) is provided with an angle adjusting elastic piece (75) between the angle adjusting lock pin (74) and the push rod adjusting seat (40) for driving the elastic reset of the angle adjusting lock pin (74).

7. The multi-functional vehicle frame according to any one of claims 1 to 6, characterized by The lower seat connecting frame (1) comprises a lower seat rear connecting rod (102) and a lower seat front connecting rod (101), the lower seat front connecting rod (101) is slidably and telescopically connected with the lower seat rear connecting rod (102), and the lower seat front connecting rod (101) is configured to be slidably and telescopically adjusted relative to the lower seat rear connecting rod (102) in the unfolded use state, and / or the lower seat front connecting rod (101) is configured to be slidably retracted relative to the lower seat rear connecting rod (102) during the folding of the frame.

8. The multi-functional vehicle frame according to claim 7, characterized by The front connecting seat (20) is rotatably connected between the front leg rod (2) and the front part of the lower seat rear connecting rod (102), and the upper part of the front connecting seat (20) is connected with the front part of the lower seat rear connecting rod (102). The rear leg rod (3) is directly rotatably connected with the middle part or the rear part of the lower seat rear connecting rod (102), or the rear leg rod (3) is indirectly rotatably connected with the middle part or the rear part of the lower seat rear connecting rod (102) through the rear connecting seat (30). The front connecting seat (20) and the lower seat front connecting rod (101) are provided with a connecting frame locking mechanism (8) and a connecting frame unlocking mechanism (9), the connecting frame locking mechanism (8) is used for locking the lower seat front connecting rod (101) relative to the front connecting seat (20), and the connecting frame unlocking mechanism (9) is connected with the connecting frame locking mechanism (8) to release the locking of the lower seat front connecting rod (101) and the front connecting seat (20) by the connecting frame locking mechanism (8). The connecting frame unlocking mechanism (9) is configured to be unlocked in linkage with the connecting frame locking mechanism (8) in the unfolded use state, so that the lower seat front connecting rod (101) is slidable to adjust the length relative to the lower seat rear connecting rod (102), and / or the connecting frame unlocking mechanism (9) is configured to be triggered to unlock the connecting frame locking mechanism (8) during the folding of the frame, so that the lower seat front connecting rod (101) is slidable to retract relative to the lower seat rear connecting rod (102).

9. The multi-functional vehicle frame according to claim 8, characterized by The connecting frame locking mechanism (8) comprises a connecting frame locking part (80) arranged on the lower seat front connecting rod (101) and a connecting frame locking block (81) movably arranged on the front connecting seat (20) and lockable with the connecting frame locking part (80), and a connecting frame locking elastic member (82) is arranged between the connecting frame locking block (81) and the front connecting seat (20) to keep the connecting frame locking block (81) in locking cooperation with the connecting frame locking part (80); the connecting frame locking block (81) is configured to be unlocked by the connecting frame unlocking mechanism (9).

10. The multi-functional vehicle frame according to claim 9, characterized by The connecting frame unlocking mechanism (9) is located between the front connecting seat (20) and the front leg rod (2) and is configured to unlock the connecting frame locking block (81) when the front leg rod (2) is folded to a preset angle; the connecting frame unlocking mechanism (9) comprises a connecting frame unlocking slider (91) movably arranged on the front connecting seat (20), and the connecting frame unlocking slider (91) and the connecting frame locking block (81) are both provided with connecting frame unlocking inclined surfaces (911) that can abut against each other, and a connecting frame unlocking elastic member (92) is arranged between the connecting frame unlocking slider (91) and the front connecting seat (20) to elastically reset the connecting frame unlocking slider (91); the connecting frame unlocking mechanism (9) further comprises a connecting frame unlocking driving member (93) arranged on the front leg rod (20) and configured to drive the connecting frame unlocking slider (91) to move when the front leg rod (2) is folded to a preset angle.

11. The multi-functional vehicle frame according to claim 10, characterized by The connecting frame unlocking mechanism (9) comprises a connecting frame unlocking operating member (94) movably exposed on the front connecting seat (20), and the connecting frame unlocking operating member (94) is directly or indirectly configured to drive the connecting frame unlocking slider (91) to move in the unfolded use state, so as to act on the unlocking action of the connecting frame locking block (81).

12. The multi-functional vehicle frame according to claim 9, characterized by The connecting frame unlocking mechanism (9) comprises a connecting frame unlocking slider (91), a connecting frame unlocking elastic member (92), a connecting frame unlocking slope (911) and a connecting frame unlocking operating member (94). The connecting frame unlocking slider (91) is movably arranged on the front connecting seat (20). The connecting frame unlocking slope (911) is arranged on the connecting frame unlocking slider (91) and the connecting frame locking block (81) to be abuttable with each other. The connecting frame unlocking elastic member (92) is arranged between the connecting frame unlocking slider (91) and the front connecting seat (20) to elastically reset the connecting frame unlocking slider (91). The connecting frame unlocking operating member (94) is movably exposed on the front connecting seat (20). In the unfolded use state, the connecting frame unlocking operating member (94) can directly or indirectly drive the connecting frame unlocking slider (91) to move to unlock the connecting frame locking block (81).

13. The multi-functional vehicle frame according to claim 2, characterized by The push rod assembly (4) and the rear leg (3) are provided with a push rod adjusting seat (40). The front part of the push rod adjusting seat (40) is fixedly connected with the extension rod (41). The rear part of the push rod adjusting seat (40) is rotatably connected with the upper end of the rear leg (3). The front end of the upper seat connecting member (100) is rotatably connected with the rear part of the push rod adjusting seat (40). The upper end of the upper seat linkage member (200) is rotatably connected with the middle part of the upper seat connecting member (100). The lower end of the upper seat linkage member (200) is rotatably connected with the upper part of the rear leg (3). The upper seat connecting member (100) is configured to be correspondingly linked and folded during the switching of the frame from the unfolded use state to the folded use state.

14. The multi-functional vehicle frame according to claim 1, characterized by The push rod assembly (4) or the rear leg (3) is provided with an upper seat mounting seat (300). The upper seat mounting seat (300) is provided with an upper seat connecting member (100) which is movably folded or unfolded relative to the upper seat mounting seat (300). The upper seat connecting member (100) and the upper seat mounting seat (300) are provided with a connecting member locking mechanism (400) for locking and positioning the upper seat connecting member (100) relative to the upper seat mounting seat (300).

15. The multi-functional vehicle frame according to claim 14, characterized by The connecting member locking mechanism (400) comprises an upper seat connection locking part (410) arranged on the upper seat connecting member (100) and an upper seat connection locking member (420) movably arranged on the upper seat mounting seat (300) and used for locking and cooperating with the upper seat connection locking part (410). The upper seat mounting seat (300) is further provided with an upper seat connection operating member (430) for driving the upper seat connection locking member (420) to move correspondingly.

16. The multi-functional vehicle frame according to claim 7, characterized by The lower seat rear connecting rod (102) and the lower seat front connecting rod (101) are connected with a lower seat connecting piece (11), and the lower seat connecting frame (1) is connected with one or two seat frames (12) through the lower seat connecting piece (11); the lower seat connecting piece (11) is configured to be switched between a use state and a non-use state, the lower seat connecting piece (11) is rotatably adjusted on the lower seat connecting frame (1), and the lower seat connecting piece (11) is used to connect with the seat frame (12) when it is in the use state, and the lower seat connecting piece (11) can be rotatably adjusted to an angle that does not interfere with the lower seat connecting frame (1) when it is in the non-use state, and the lower seat connecting piece (11) and the lower seat connecting frame (1) are provided with an adjusting locking mechanism (111) for locking the lower seat connecting piece (11) relative to the lower seat connecting frame (1).

17. The multi-functional vehicle frame according to claim 16, characterized by The lower seat front connecting rod (101) and the lower seat connecting piece (11) located thereon are provided with a blocking limiting mechanism (110), the lower seat front connecting rod (101) is slidably connected with the lower seat rear connecting rod (102) through the front connecting seat (20), and the lower seat front connecting rod (101) and the front connecting seat (20) are provided with a connecting frame locking mechanism (8) and a connecting frame unlocking mechanism (9), the connecting frame locking mechanism (8) is used to lock the lower seat front connecting rod (101) relative to the front connecting seat (20), and the blocking limiting mechanism (110) is configured to block and limit the connecting frame locking mechanism (8) from locking the lower seat front connecting rod (101) relative to the lower seat rear connecting rod (102) when the lower seat connecting piece (11) located on the lower seat front connecting rod (101) is in the use state and the lower seat front connecting rod (101) is retracted.

18. The multi-functional vehicle frame according to claim 17, characterized by The blocking limiting mechanism (110) is also configured to release the blocking and limitation of the blocking limiting mechanism (110) when the lower seat connecting piece (11) located on the lower seat front connecting rod (101) is in the non-use state and the lower seat front connecting rod (101) is retracted, so that the connecting frame locking mechanism (8) locks the lower seat front connecting rod (101) relative to the lower seat rear connecting rod (102).

Images