Multifunctional frame

Abstract

A lower seat connecting frame is used for being connected with at least one seat frame and is transversely arranged in the front-back direction in the unfolded use state, and during folding, 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, and then the lower seat connecting frame is folded. 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] The invention relates to the field of children's safety travel products, and in particular to a multifunctional frame. [Background technology]

[0002] With the improvement of living standards, people have higher and higher requirements for travel convenience. Therefore, the operability of the stroller when folding and the size of the stroller after folding have become the focus of consumers. More specifically, for foldable strollers, the better the linkage of the components of the stroller, the easier it is to fold and unfold. Conversely, it is more laborious to operate. As for the size of the stroller after folding, in order to facilitate carrying in cars, high-speed trains and even airplanes, of course, it is hoped that the size of the stroller after folding is as small as possible; and when it is not in use and stored at home, the smaller the size, the less space it takes up.

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

[0004] 1. It cannot be fully folded. After folding, the stroller still occupies a large volume, which is not conducive to packaging, carrying and storage;

[0005] 2. The structure is complex, the function is single, and it is only used as a child stroller;

[0006] 3. The user needs to fold several groups of components separately, which is time-consuming and laborious;

[0007] 4. The position of the seat frame is relatively fixed and the usage scenario cannot be changed.

[0008] Therefore, the present invention is studied and proposed in view of the above problems. [Summary of the invention]

[0009] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a multifunctional bicycle frame, wherein the lower seat connecting frame is used to connect at least one seat frame and is arranged transversely along the front-to-back direction in the unfolded use state. When folding, the user only needs to operate the frame folding unlocking mechanism to link the frame locking mechanism to release the locked state of the frame, so that the front foot rod, the rear foot rod and the push rod assembly can be folded close to the lower seat connecting frame respectively, so that the structure of the folded vehicle is more compact and the volume is minimized, meeting the carrying and storage requirements of the user; and the lower seat connecting frame is arranged transversely along the front-to-back direction, which can be connected to the seat frame and used as a child bicycle frame, and can also be used to carry shopping baskets, vegetable baskets or other items as a common bicycle frame when not connected to the seat frame, so it has a multifunctional feature.

[0010] In order to solve the above technical problems, the present invention provides a multifunctional frame, which can be switched between an unfolded use state and a folded use state, and comprises:

[0011] The lower seat connecting frame 1 is used to connect at least one seat frame 12 and is arranged transversely along the front-rear direction in the unfolded use state;

[0012] A front foot rod 2, the lower end of which is connected to a front wheel assembly, and the upper portion of which is movably connected to the lower seat connecting frame 1;

[0013] A rear foot rod 3, the lower end of which is connected to a rear wheel assembly, and the middle portion of the rear foot rod 3 is movably connected to the lower seat connecting frame 1;

[0014] A push rod assembly 4, wherein the lower end of the push rod assembly 4 is directly or indirectly rotatably connected to the upper end of the front foot rod 2, and the lower part of the push rod assembly 4 is directly or indirectly rotatably connected to the upper end of the rear foot rod 3;

[0015] A frame locking mechanism 5, wherein the frame locking mechanism 5 is arranged on the frame and is used to lock the frame in an unfolded use state;

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

[0017] As described above, a multifunctional 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 foot rod 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 foot 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 foot rod 2, so that after the frame locking mechanism 5 is linked to release the locking state of the extension rod 41 and the front foot rod 2, the push rod body 42 is rotated and folded relative to the lower seat connecting frame 1, and the corresponding front foot rod 2 and the rear foot rod 3 are folded backwards and folded close to the lower seat connecting frame 1.

[0018] As described above, a multifunctional frame, the frame locking mechanism 5 includes 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 maintain locking cooperation with the frame locking portion 51, the frame folding and unlocking mechanism 6 is arranged on the push rod assembly 4, and the frame locking member 52 is configured to be linked to its unlocking action by the frame folding and unlocking mechanism 6.

[0019] As described above, the multifunctional frame, the frame folding and unlocking mechanism 6 includes a frame folding and unlocking member 61 movably arranged on the push rod body 42 and a frame folding and unlocking linkage member 62 penetrating the extension rod 41 and the push rod body 42, one end of the frame folding and unlocking linkage member 62 is connected to the frame folding and unlocking member 61, and the other end of the frame folding and unlocking linkage member 62 is connected to the frame locking member 52.

[0020] As described above, a multifunctional frame has a push rod adjustment seat 40 between the push rod assembly 4 and the rear foot rod 3, the front portion of the push rod adjustment seat 40 is relatively fixedly connected to the extension rod 41, and the rear portion 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, and an angle adjustment mechanism 7 for adjusting the push rod body 42 to switch between the pushing use state and the towing use state is provided between the push rod body 42 and the push rod adjustment seat 40.

[0021] As described above, in a multifunctional frame, the angle adjustment mechanism 7 includes an adjustment slide 70 slidably provided on the push rod body 42 and an adjustment slide bar 71 slidably provided on the push rod adjustment seat 40, the upper end of the adjustment slide bar 71 is rotatably connected to the adjustment slide 70, and the adjustment slide bar 71 is provided with a pushing adjustment lock hole 72 and a towing adjustment lock hole 73 spaced apart from each other; the angle adjustment mechanism 7 also includes an angle adjustment lock pin 74 movably provided on the push rod adjustment seat 40 and used for locking with the pushing adjustment lock hole 72 or the towing adjustment lock hole 73, one end of the angle adjustment lock pin 74 is directly or indirectly connected to an angle adjustment operating member 741, and an angle adjustment elastic member 75 for driving the angle adjustment lock pin 74 to elastically return to its original position is provided between the angle adjustment lock pin 74 and the push rod adjustment seat 40.

[0022] As described above, a multifunctional 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 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 be able to slide and retract relative to the lower seat rear link 102 during the folding process of the frame.

[0023] As described above, a multifunctional frame is provided with a front connecting seat 20 between the front foot rod 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 foot rod 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 foot rod 3 is directly rotatably connected to the middle or rear part of the lower seat rear link 102, or the rear foot rod 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 101, and the connecting frame locking mechanism 8 is used to The front connecting rod 101 of the lower seat is locked relative to the front connecting seat 20, and the connecting frame unlocking mechanism 9 is linked to the connecting frame locking mechanism 8 to link the connecting frame locking mechanism 8 to release the lock of the front connecting rod 101 of the lower seat and the front connecting seat 20; the connecting frame unlocking mechanism 9 is configured to be able to link the connecting frame locking mechanism 8 to unlock in the unfolded use state so that the front connecting rod 101 of the lower seat can be slidably telescopically adjusted relative to the rear connecting rod 102 of the lower seat, and / or the connecting frame unlocking mechanism 9 is configured to be triggered during the folding process of the frame and to link the connecting frame locking mechanism 8 to unlock so that the front connecting rod 101 of the lower seat can be slidably retracted relative to the rear connecting rod 102 of the lower seat.

[0024] As described above, in a multifunctional vehicle frame, the connecting frame locking mechanism 8 includes a connecting frame locking portion 80 arranged on the front connecting rod 101 of the lower seat and a connecting frame locking block 81 movably arranged on the front connecting seat 20 and capable of locking with the connecting frame locking portion 80, and a connecting frame locking elastic member 82 for keeping the connecting frame locking block 81 locked with the connecting frame locking portion 80 is provided between the connecting frame locking block 81 and the front connecting seat 20; the connecting frame locking block 81 is configured to be linked to its unlocking action by the connecting frame unlocking mechanism 9.

[0025] As described above, in a multifunctional frame, the connecting frame unlocking mechanism 9 is located between the front connecting seat 20 and the front foot rod 2 and is configured to be used to link the connecting frame locking block 81 to unlock when the front foot rod 2 is flipped and folded to a preset angle; the connecting frame unlocking mechanism 9 includes 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 for driving the connecting frame unlocking slider 91 to elastically reset is provided between the connecting frame unlocking slider 91 and the front connecting seat 20; the connecting frame unlocking mechanism 9 also includes a connecting frame unlocking driving member 93 which is arranged on the front foot rod 20 and is used to drive the connecting frame unlocking slider 91 to move when the front foot rod 2 is flipped and folded to a preset angle.

[0026] In the multifunctional frame as described above, the connecting frame unlocking mechanism 9 includes a connecting frame unlocking operating member 94, and the connecting frame unlocking operating member 94 can be movably exposed from the front connecting seat 20, and the connecting frame unlocking operating member 94 can directly or indirectly drive the connecting frame unlocking slider 91 to move in the unfolded use state, so as to perform the unlocking action of the connecting frame locking block 81.

[0027] As described above, a multifunctional vehicle frame, the connecting frame unlocking mechanism 9 includes a connecting frame unlocking slider 91, a connecting frame unlocking elastic member 92, a connecting frame unlocking inclined surface 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 inclined surface 911 is arranged on the connecting frame unlocking slider 91 and the connecting frame locking block 81 so as to be able to abut and cooperate 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 drive the connecting frame unlocking slider 91 to elastically reset, the connecting frame unlocking operating member 94 can be movably exposed from the front connecting seat 20, and the connecting frame unlocking operating member 94 can directly or indirectly drive the connecting frame unlocking slider 91 to move in the unfolded use state to act on the connecting frame locking block 81 to unlock.

[0028] As described above, a multifunctional frame also includes an upper seat connecting member 100 and an upper seat linkage member 200. A push rod adjustment seat 40 is provided between the push rod assembly 4 and the rear foot rod 3. The front portion of the push rod adjustment seat 40 is relatively fixedly connected to the extension rod 41, and the rear portion 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 connecting member 100 is rotatably connected to the rear of the push rod adjustment seat 40, the upper end of the upper seat linkage member 200 is rotatably connected to the middle portion of the upper seat connecting member 100, and the lower end of the upper seat linkage member 200 is rotatably connected to the upper portion of the rear foot rod 3; the upper seat connecting member 100 is configured to be folded and linked accordingly when the frame is switched from an unfolded use state to a folded use state.

[0029] In the multifunctional frame as described above, an upper seat mounting seat 300 is provided on the push rod assembly 4 or the rear foot rod 3, and an upper seat connecting member 100 which can be folded or unfolded relative to the upper seat mounting seat 300 is provided on the upper seat mounting seat 300, and a connecting member locking mechanism 400 for locking and positioning the upper seat connecting member 100 relative to the upper seat mounting seat 300 is provided between the upper seat connecting member 100 and the upper seat mounting seat 300.

[0030] As described above, in a multifunctional frame, the connector locking mechanism 400 includes an upper seat connection locking portion 410 provided on the upper seat connector 100 and an upper seat connection locking member 420 movably provided on the upper seat mounting seat 300 and used for locking cooperation with the upper seat connection locking portion 410. The upper seat mounting seat 300 is also provided with an upper seat connection operating member 430 for driving the upper seat connection locking member 420 to act accordingly.

[0031] As described above, a multifunctional frame has a lower seat connecting piece 11 connected to the lower seat rear link 102 and the lower seat front link 101, and the lower seat connecting frame 1 is connected to one or two seat frames 12 through the lower seat connecting piece 11; the lower seat connecting piece 11 is configured to be switchable between a use state and a non-use state, and the lower seat connecting piece 11 is rotatably and adjustably arranged on the lower seat connecting frame 1, and is used to connect with the seat frame 12 when the lower seat connecting piece 11 is in use, and can be rotatably adjusted to an angle that does not interfere with the lower seat connecting frame 1 for loading objects when the lower seat connecting piece 11 is in non-use state, and an adjustment locking mechanism 111 for locking the lower seat connecting piece 11 relative to the lower seat connecting frame 1 is provided between the lower seat connecting piece 11 and the lower seat connecting frame 1.

[0032] As described above, a multifunctional frame is provided with a blocking and limiting mechanism 110 between the lower seat front link 101 and the lower seat connecting piece 11 located thereon, the lower seat front link 101 is slidably connected to the lower seat rear link 102 through 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, and the blocking and limiting mechanism 110 is configured to block and limit the connecting frame locking mechanism 8 from locking the lower seat front link 101 relative to the lower seat rear link 102 when the lower seat connecting piece 11 located on the lower seat front link 101 is in use and the lower seat front link 101 is retracted.

[0033] As described above, in a multifunctional frame, the blocking and limiting mechanism 110 is also configured such that when the lower seat connecting piece 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 restriction of the blocking and limiting mechanism 110 is released so that the connecting frame locking mechanism 8 locks the lower seat front link 101 relative to the lower seat rear link 102.

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

[0035] 1. The user only needs to operate the frame folding unlocking mechanism to link the frame locking mechanism to release the locked state of the frame, so that the front foot rod, the rear foot rod and the push rod assembly can be folded close to the lower seat connecting frame respectively, so that the structure of the folded vehicle is more compact and the volume is minimized, which meets the carrying and storage requirements of the user.

[0036] 2. In the present invention, the push rod assembly is rotated relative to the lower seat connecting frame to fold and retract, and the corresponding front foot rod and rear foot rod are folded and folded toward the lower seat connecting frame. That is, the push rod assembly has the functional characteristics of linking the front foot rod and the rear foot rod to corresponding movements, which is beneficial to improving the efficiency of folding and unfolding the frame.

[0037] 3. The lower seat connecting frame of the present invention is arranged horizontally along the front and back. The lower seat connecting frame can be connected to the seat frame to be used as a child bicycle frame, and the connection position of the seat frame can be adjusted front and back as needed; it can also be used as a common bicycle frame for carrying shopping baskets, vegetable baskets or other items when the seat frame is not connected, so it has multifunctionality.

[0038] 4. In the present invention, 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 use state and the dragging use state, which is convenient for people to use in different scenes and further enriches its functional diversity and convenience.

[0039] 5. In the present invention, the front connecting rod of the lower seat and the rear connecting rod of the lower seat are slidably and telescopically connected, and during the folding process of the frame, after the front connecting rod of the lower seat is unlocked, it automatically retracts into the inner side of the frame under the action of gravity, ensuring that the frame is compact and minimized in size after folding, which is convenient for people to store and carry, as well as convenient for factory packaging, reducing packaging costs.

[0040] 6. The lower seat connector on the lower seat connecting frame is adjustable, having a use state connected to the seat frame and a non-use state not connected to the seat frame. When not in use, 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 the present invention has three positions to choose from 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 not in use and the lower seat front connecting rod is retracted, the lower seat front connecting rod can be locked relative to the lower seat rear connecting rod, so that the frame of the present invention is converted into a common frame, and the lower seat connecting frame can be more convenient and reliable for loading corresponding items. When the lower seat connector on the lower seat connecting frame is in use and the lower seat front connecting rod is retracted, the user can directly pull the seat front connecting rod relative to the lower seat rear connecting rod to use it as a baby carriage frame without additional unlocking action, so it has the characteristics of diverse functions, reliable structural design and convenient operation.

Brief Description of the Drawings

[0043] The specific embodiments of the present invention are further described in detail below with reference to the accompanying drawings, wherein:

[0044] Figure 1 This is one of the three-dimensional diagrams of the embodiment 1 of the present invention when it is in a promotion and use state.

[0045] Figure 2 This is the second stereoscopic diagram of the embodiment 1 of the present invention when it is in the promotion and use state.

[0046] Figure 3 It is a stereoscopic diagram of the embodiment 1 of the present invention in a towing state.

[0047] Figure 4 This is the third stereoscopic diagram of the embodiment 1 of the present invention when it is in a promotion and use state.

[0048] Figure 5 This is the fourth stereoscopic diagram of the embodiment 1 of the present invention when it is in a promotion and use state.

[0049] Figure 6 It is a side view of the embodiment 1 of the present invention when it is in a state of being pushed and used.

[0050] Figure 7 It is a three-dimensional diagram of Example 1 of the present invention in a folded use state.

[0051] Figure 8 It is an exploded view of the frame locking mechanism in embodiment 1 of the present invention.

[0052] Fig. 9 This is one of the exploded views of the angle adjustment mechanism in Example 1 of the present invention.

[0053] Fig.10 This is the second exploded view of the angle adjustment mechanism in Example 1 of the present invention.

[0054] Fig.11 This is one of the exploded views of the locking mechanism of the connecting frame in Example 1 of the present invention.

[0055] Fig.12This is the second exploded view of the locking mechanism of the connecting frame in Example 1 of the present invention.

[0056] Fig.13 It is a stereoscopic diagram of Example 2 of the present invention in an unfolded use state.

[0057] Fig.14 This is one of the exploded views of Example 2 of the present invention when it is in an expanded use state.

[0058] Fig.15 This is the second exploded view of Embodiment 2 of the present invention when it is in the unfolded use state.

[0059] Fig.16 It is an exploded view of the locking mechanism of the connector in Example 2 of the present invention.

[0060] Fig.17 This is a three-dimensional diagram of Example 2 of the present invention in an unfolded use state and a portion of the lower seat connector is in a non-use state.

[0061] Fig.18 This is one of the exploded views of the adjustment locking mechanism in Example 2 of the present invention.

[0062] Fig.19 This is the second exploded view of the adjustment locking mechanism in Example 2 of the present invention. [Specific implementation method]

[0063] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0064] like Figure 1-19As shown, the present invention provides a multifunctional frame, which can be switched between an unfolded use state and a folded use state, and includes a lower seat connecting frame 1, a front foot rod 2, a rear foot rod 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 seat frame 12, and is arranged horizontally along the front and rear direction in the unfolded use state; the lower end of the front foot rod 2 is connected to the front wheel assembly, and the upper part of the front foot rod 2 is movably connected to the lower seat connecting frame 1; the lower end of the rear foot rod 3 is connected to the rear wheel assembly, and the middle part of the rear foot rod 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 foot rod 2, and the lower part of the push rod assembly 4 is directly or indirectly rotatably connected to the upper end of the rear foot rod 3; the frame locking mechanism 5 is arranged on the frame for locking the frame in the unfolded use state; the frame folding unlocking mechanism 6 is arranged on the frame, and is used to link the frame locking mechanism 5 to release the locking state of the frame so that the frame can be switched from the unfolded use state to the folded use state. When the present invention is folded, the user operates the frame folding unlocking mechanism 6 to link the unlocking action of the frame locking mechanism 5, thereby releasing the locking state of the frame in the unfolded use state. At this time, the front leg rod, the rear leg rod and the push rod assembly can be moved toward the side of the lower seat connecting frame and folded until the frame is switched from the unfolded use state to the folded use state. For this reason, the present invention can make the structure of the entire vehicle after folding more compact and minimize the volume, meeting the user's carrying and storage requirements.

[0065] The lower seat connecting frame of the present invention is arranged transversely along the front and back, and can be connected with the seat frame to be used as a child bicycle frame, and the connection position of the seat frame can be adjusted forward and backward as needed; it can also be used as a common bicycle frame for carrying shopping baskets, vegetable baskets or other items when not connected with the seat frame, so it has multifunctionality.

[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 foot rod 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 foot 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 foot rod 2, so that after the frame locking mechanism 5 is linked to release the locking state of the extension rod 41 and the front foot rod 2, the push rod body 42 is rotated and folded relative to the lower seat connecting frame 1, and the correspondingly linked front foot rod 2 and rear foot rod 3 are folded backwards and folded close to the lower seat connecting frame 1 during the folding and retracting process, so that the push rod assembly has the functional characteristics of linking the corresponding actions of the front foot rod and the rear foot rod, which is beneficial to improving the efficiency of frame folding and unfolding, simplifying the structure, reducing manufacturing costs, and improving market competitiveness. When folding, the upper part of the operating push rod body 42 is flipped downward and rotated toward the side of the lower seat connecting frame for folding. The push rod body 42 causes the upper part of the rear foot rod to flip downward and the lower part of the rear foot rod to flip upward and move toward the side of the lower seat connecting frame for folding. At the same time, the push rod body 42 drives the upper end of the front foot rod to flip forward through the extension rod 41, so that the lower part of the front foot rod flips backward and moves toward the side of the lower seat connecting frame for folding.

[0067] like Figure 8 As shown, in order to lock the frame more stably and reliably, 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.

[0068] like Figure 13-15 As shown in 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, thereby simplifying the structure.

[0069] like Figure 1-7 , 13-15, and 17, in order to make the frame structure more compact and minimize the volume after folding, the push rod assembly 4 also includes an upper push rod 43 that is movably connected to the push rod body 42, and an upper push rod locking mechanism for locking the upper push rod 43 relative to the push rod body 42 is provided between the upper push rod 43 and the push rod body 42, and an upper push rod unlocking mechanism for linking the unlocking action of the upper push rod locking mechanism is provided on the upper push rod 43. 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. When folding, the upper push rod unlocking mechanism is operated to link the unlocking action of the upper push rod locking mechanism, thereby releasing the locking state of the upper push rod 43 relative to the push rod body 42, and then the upper push rod 43 is retracted into the push rod body 42, as shown in FIG. Figure 7 When unfolding, the upper push rod 43 is operated to extend to a set length relative to the push rod body 4, such as Figure 1-6As shown, the operation is simple and the design is reasonable, which can meet the needs of pushers of different heights. The upper push rod locking mechanism in the present invention includes but is not limited to a plurality of upper push rod locking holes arranged at intervals on the push rod body 42 and an upper push rod locking latch slidably arranged on the upper push rod 43 and insertable into the corresponding upper push rod locking holes, and a latch reset elastic member is provided between the upper push rod locking latch and the upper push rod 43; the upper push rod locking latch is correspondingly linked to its unlocking action by the upper push rod unlocking mechanism. The upper push rod unlocking mechanism includes but is not limited to an upper push rod unlocking button movably arranged on the upper push rod 43 and an upper push rod unlocking linkage member for connecting the upper push rod unlocking button and the upper push rod locking latch.

[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 achieve maximum utilization of the 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 front foot rod 2, the extension rod 41 and the push rod body 42 are connected to form an inverted Z-shaped structure, and the lower seat connecting frame 1 is arranged horizontally.

[0071] like Figure 8 As shown, in order to facilitate the locking and unlocking of the extension rod relative to the front foot rod, the frame locking mechanism 5 includes a frame locking portion 51 provided on the front foot rod 2, a frame locking member 52 movably provided on the extension rod 41 and locked with the frame locking member 51, and a frame locking elastic member 53 for elastically driving the frame locking member 52 to maintain the locking with the frame locking member 51, and the frame folding and unlocking mechanism 6 is provided on the push rod assembly 4, and the frame locking member 52 is configured to be linked to its unlocking action by the frame folding and unlocking mechanism 6. In this embodiment, the middle part of the frame locking member 52 is rotatably provided on the extension rod 41, the front end of the frame locking member 52 is locked with the frame locking portion 51, the rear end of the frame locking member 52 is connected with 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, so that the locking is reliable.

[0072] like Figure 8As shown, for the convenience of unlocking, the frame folding unlocking mechanism 6 includes a frame folding unlocking member 61 movably arranged on the push rod body 42 and a frame folding unlocking linkage member 62 penetrating 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. When unlocking, the user operates the frame folding unlocking member 61 to move relative to the push rod assembly 4, and the frame folding unlocking member 61 drives the frame locking member 52 to move accordingly through the frame folding unlocking linkage member 62, so that the locking end of the frame locking member 52 is separated from the frame locking portion 51, and the locking state of the extension rod 41 relative to the front leg rod 2 is released. In this embodiment, the frame folding unlocking member 61 is slidably arranged on the push rod assembly 4.

[0073] like Figure 8 As shown, the frame locking mechanism 5 and the frame folding and unlocking mechanism 6 are correspondingly arranged between the left and right front foot rods and the left and right push rod assemblies. When unlocking, only when the user operates the left and right frame folding and unlocking mechanisms 6 and simultaneously links the unlocking actions of the left and right frame locking mechanisms 5 can the locking state of the push rod assembly relative to the front foot rod be released, which can avoid the occurrence of misoperation, play a fool-proof role, and ensure safe and reliable use.

[0074] The two frame locking mechanisms 5 on the left and right sides may also be configured to be simultaneously linked by a frame folding and unlocking mechanism 6 to improve the unlocking efficiency.

[0075] like Figure 1-7 As shown in Figures 9 and 10, in order to make the present invention multifunctional and usable in multiple scenarios and 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 relatively 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, and an angle adjustment mechanism 7 for adjusting the push rod body 42 to switch between the pushing use state and the towing use state is provided between the push rod body 42 and the push rod adjustment seat 40. Among them, when the lower seat connecting frame is connected to the seat frame for use, the frame is a child frame, and when it is not connected to the seat frame for use, the frame is an ordinary frame. In addition, both the child frame and the ordinary frame can adjust the angle of the push rod body through the angle adjustment mechanism 7 for pushing or towing.

[0076] like Fig. 9 , 10As shown, in order to facilitate adjustment, the angle adjustment mechanism 7 includes an adjustment slide 70 slidably provided on the push rod body 42 and an adjustment slide bar 71 slidably provided on the push rod adjustment seat 40, the upper end of the adjustment slide bar 71 is rotatably connected to the adjustment slide 70, and the adjustment slide bar 71 is provided with a pushing adjustment lock hole 72 and a dragging adjustment lock hole 73 spaced apart from each other; the angle adjustment mechanism 7 also includes an angle adjustment lock pin 74 movably provided on the push rod adjustment seat 40 and used for locking with the pushing adjustment lock hole 72 or the dragging adjustment lock hole 73, one end of the angle adjustment lock pin 74 is directly or indirectly connected to an angle adjustment operating member 741, and an angle adjustment elastic member 75 for driving the angle adjustment lock pin 74 to elastically reset is provided between the angle adjustment lock pin 74 and the push rod adjustment seat 40. When the push rod body 42 is adjusted from the pushing use state to the towing use state, the angle adjustment locking pin 74 is caused to slide outward relative to the push rod adjustment seat 40 through the action of the angle adjustment operating member 741, so that the locking end of the angle adjustment locking pin 74 exits the pushing adjustment locking hole 72. Then the push rod body 42 is pressed downward so that the push rod body 42 flips 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 towing use state. At this moment, the towing adjustment locking hole 73 is aligned with the locking end of the angle adjustment locking pin 74, and the force applied to the angle adjustment operating member 741 is canceled. The angle adjustment locking pin 74 is elastically reset under the action of the angle adjustment elastic member 75 and inserted into the towing adjustment locking hole 73, thereby locking the push rod body relative to the push rod adjustment seat 40 in the towing use state.

[0077] like Fig. 9 , 10 As shown, the two angle adjustment mechanisms 7 on the left and right sides are independent mechanisms. When adjusting, only by operating the two angle adjustment mechanisms 7 on the left and right sides at the same time can the angle of the push rod body be adjusted, which can avoid misoperation, play a fool-proof role, and ensure safe and reliable use.

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

[0079] like Fig. 9 , 10As shown, in order to achieve the anti-pinch effect and ensure safe and reliable use, the adjusting slide bar 71 is hollow, and an anti-pinch slide 76 is slidably provided inside the adjusting slide bar 71. The anti-pinch slide block 76 is provided with a pushing anti-pinch hole 761 that can be aligned and connected with the pushing adjustment lock hole 72, and a towing anti-pinch hole 762 that can be aligned and connected with the towing adjustment lock hole 73. An anti-pinch slide block elastic member 77 for driving the anti-pinch slide block 76 to elastically reset is provided between the upper end of the anti-pinch slide block 76 and the adjusting slide bar 71. The lower end of the anti-pinch slide block 76 extends out of the outside of the adjusting slide bar 71 and can be in contact with the upper end of the rear foot rod 3. When the push rod body 42 is switched from the pushing use state to the towing use state, the push rod body 42 is pressed downward, so that the adjustment slide bar 71 drives the anti-pinch slider 76 to slide downward relative to the push rod adjustment seat 40. When the anti-pinch slider 76 slides downward for a certain distance, the lower end of the anti-pinch slider 76 contacts the upper end of the rear foot rod 3 and restricts the anti-pinch slider 76 from continuing to slide downward. At this time, since the adjustment slide bar 71 continues to slide downward, the anti-pinch slider 76 slides upward relative to the adjustment slide bar 71 until the towing anti-pinch hole 762 is aligned and connected with the towing adjustment lock hole 73, and the pushing anti-pinch hole 761 is misaligned with the pushing adjustment lock hole 72.

[0080] When the push rod body 42 is switched from the towing use state to the pushing use state, the push rod body 42 is lifted up so that the adjustment slide bar 71 drives the anti-pinch slider 76 to slide upward relative to the push rod adjustment seat 40. When the anti-pinch slider 76 slides upward for a certain distance, the lower end of the anti-pinch slider 76 is separated from the upper end of the rear foot rod 3. At this moment, the anti-pinch slider 76 slides downward relative to the adjustment slide bar 71 under the elastic force of the anti-pinch slider elastic part 77 until the pushing anti-pinch hole 761 is aligned and connected with the pushing adjustment lock hole 72, and the towing anti-pinch hole 762 is misaligned with the towing adjustment lock hole 73.

[0081] like Fig. 9 , 10 As shown, an angle limiting structure 44 for limiting the flipping 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 portion 441 and a dragging blocking portion 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 and capable of blocking and limiting with the pushing blocking portion 441 or the dragging blocking portion 442, that is, when the angle blocking member blocks and cooperates with the pushing blocking portion, the push rod body 42 is in a pushing use state at this moment; when the angle blocking member blocks and cooperates with the dragging blocking portion, the push rod body 42 is in a dragging use state at this moment, thereby ensuring that the frame structure in the pushing and dragging use states is stable and reliable, and also ensuring that the angle adjustment lock pin 74 accurately cooperates with the pushing adjustment lock hole 72 or the dragging adjustment lock hole 73.

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

[0083] like Figure 1-15 As shown, for the convenience of unlocking, a front connecting seat 20 is provided between the front foot rod 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 foot rod 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 foot rod 3 is directly rotatably connected to the middle or rear part of the lower seat rear connecting rod 102, or the rear foot rod 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, and the connecting frame locking mechanism 8 is used to unlock the lower seat The front seat connecting rod 101 is locked relative to the front connecting seat 20, and the connecting frame unlocking mechanism 9 is linked to the connecting frame locking mechanism 8 to link the connecting frame locking mechanism 8 to release the lock of the lower seat front connecting rod 101 and the front connecting seat 20; the connecting frame unlocking mechanism 9 is configured to be able to link the connecting frame locking mechanism 8 to unlock in the unfolded use state so that the lower seat front connecting rod 101 can be slidably telescopically adjusted relative to the lower seat rear connecting rod 102, and / or the connecting frame unlocking mechanism 9 is configured to be triggered during the folding process of the frame and to link the connecting frame locking mechanism 8 to unlock so that the lower seat front connecting rod 101 can be slidably retracted relative to the lower seat rear connecting rod 102.

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

[0085] like Fig.11 , 12As shown, in order to ensure reliable locking, the connecting frame locking mechanism 8 includes a connecting frame locking portion 80 arranged on the front connecting rod 101 of the lower seat and a connecting frame locking block 81 which is movably arranged on the front connecting seat 20 and can be locked with the connecting frame locking portion 80, and a connecting frame locking elastic member 82 for keeping the connecting frame locking block 81 locked with the connecting frame locking portion 80 is provided between the connecting frame locking block 81 and the front connecting seat 20; the connecting frame locking block 81 is configured to be linked to the unlocking action of the connecting frame unlocking mechanism 9. Among them, there are multiple connecting frame locking parts 80 on the lower seat front connecting rod 101, that is, when the lower seat front connecting rod 101 is retracted relative to the lower seat rear connecting rod 102, the connecting frame locking block 81 is locked and matched with the corresponding connecting frame locking part 80, and when the lower seat front connecting rod 101 is extended relative to the lower seat rear connecting rod 102, the connecting frame locking block 81 is locked and matched with the corresponding connecting frame locking part 80, ensuring that the lower seat front connecting rod 101 is locked regardless of whether it is in the retracted state or the extended state, thereby ensuring reliable use.

[0086] like Fig.11 , 12 -15, for the convenience of unlocking, the connecting frame unlocking mechanism 9 is located between the front connecting seat 20 and the front foot rod 2 and is configured to be used to link the connecting frame locking block 81 to unlock when the front foot rod 2 is flipped and folded to a preset angle; the connecting frame unlocking mechanism 9 includes 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 for driving the connecting frame unlocking slider 91 to elastically return to its original position is provided between the connecting frame unlocking slider 91 and the front connecting seat 20; the connecting frame unlocking mechanism 9 also includes a connecting frame unlocking driving member 93 which is arranged on the front foot rod 20 and is used to drive the connecting frame unlocking slider 91 to move when the front foot rod 2 is flipped and folded to a preset angle. During the rotation and folding process of the front foot rod 2, the front foot rod 2 drives the connecting frame unlocking driving member 93 to rotate, so that the connecting frame unlocking driving member 93 acts on the slider driving inclined surface of the connecting frame unlocking slider 91, thereby driving the connecting frame unlocking slider 91 to slide accordingly relative to the front connecting seat 20. At this moment, the connecting frame unlocking slider 91 cooperates with the two connecting frame unlocking inclined surfaces 911 to drive the connecting frame locking block 81 to slide downward relative to the front connecting seat 20 and separate from the connecting frame locking portion 80, thereby releasing the locking state of the lower seat front connecting rod 101 relative to the front connecting seat 20. Thereafter, the lower seat front connecting rod 101 slides toward the rear of the frame under the action of its own gravity or external force and slides into the lower seat rear connecting rod 102 or the inner side of the frame.

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

[0088] like Figure 13-15 As shown in Figures 17, in order 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 member 92, a connecting frame unlocking inclined surface 911 and a connecting frame unlocking operating member 94. The connecting frame unlocking slider 91 is movably arranged on the front connecting seat 20, and the connecting frame unlocking inclined surface 911 is arranged on the connecting frame unlocking slider 91 and the connecting frame locking block 81 so as to be able to abut and cooperate 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 drive the connecting frame unlocking slider 91 to elastically reset. The connecting frame unlocking operating member 94 can be movably exposed from the front connecting seat 20, and the connecting frame unlocking operating member 94 can directly or indirectly drive the connecting frame unlocking slider 91 to move in the expanded use state, so as to exert an unlocking action on the connecting frame locking block 81.

[0089] like Figure 1-10 As shown, in order to facilitate the folding and unfolding and simplify 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 relatively 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 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 correspondingly linked and folded 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, an upper seat mounting seat 300 is provided on the push rod assembly 4 or the rear foot rod 3, and an upper seat connecting member 100 which can be folded or unfolded relative to the upper seat mounting seat 300 is provided on the upper seat mounting seat 300, and a connecting member locking mechanism 400 for locking and positioning the upper seat connecting member 100 relative to the upper seat mounting seat 300 is provided between the upper seat connecting member 100 and the upper seat mounting seat 300; the connecting member locking mechanism 400 includes an upper seat connecting locking portion 410 provided on the upper seat connecting member 100 and an upper seat connecting locking member 420 which is movably provided on the upper seat mounting seat 300 and is used for locking and cooperating with the upper seat connecting locking portion 410, and an upper seat connecting operating member 430 for driving the upper seat connecting locking member 420 to act accordingly is also provided on the upper seat mounting seat 300. When unlocking, the user moves the upper seat connection operating member 430 to drive the upper seat connection locking member 420 to slide relative to the upper seat mounting seat 300 away from the upper seat connection member 100 until the upper seat connection locking member 420 is separated from the upper seat connection locking portion 410 to release the locking state of the upper seat connection member 100 relative to the upper seat mounting seat 300. At this time, the upper seat connection member 100 can be rotated and folded closer relative to the upper seat mounting seat 300.

[0091] like Figure 1-19 As shown, in order to realize the dual-seat function and personalized adjustment, the lower seat rear link 102 and the lower seat front link 101 are connected with a lower seat connector 11, and the lower seat connecting frame 1 is connected with one or two seat frames 12 through the lower seat connector 11. Among them, the specifications and sizes of the lower seat connector 11 located on the lower seat front link 101 and the lower seat connector 11 located on the lower seat rear link 102 in this embodiment can be configured to be the same or different to meet the connection requirements of the seat frames.

[0092] In order to realize the double-seat functional feature, the lower seat connecting frame in the present invention can be connected to one frame or two seat frames, and the upper seat connecting piece can also be connected to one frame accordingly. Therefore, the frame of the present invention has three positions to choose from for connecting the seat frame, and then the user can adjust it according to the scene requirements, which has personalized characteristics.

[0093] like Figure 1-19 As shown, for the convenience of use, the lower seat connector 11 is configured to be switchable between the use state and the non-use state. The lower seat connector 11 is rotatably adjustable on the lower seat connection frame 1, and is used to connect with the seat frame 12 when the lower seat connector 11 is in the use state. When the lower seat connector 11 is in the non-use state, it can be rotatably adjusted to an angle that does not interfere with the lower seat connection frame 1 for placing objects. An adjustment locking mechanism 111 is provided between the lower seat connector 11 and the lower seat connection frame 1 for locking the lower seat connector 11 relative to the lower seat connection frame 1. Fig.17As shown, at this moment, a corresponding shopping basket or vegetable basket can be directly placed on the lower seat connecting frame 1 without being interfered by the lower seat connecting member 11.

[0094] like Fig.18 , 19 As shown, in order to ensure reliable locking, the adjustment locking mechanism 111 includes but is not limited to an adjustment locking recess 1111 provided on the lower seat front link 101 and an adjustment locking block 1112 slidably provided on the lower seat connecting member 11 and used for locking with the adjustment locking recess 1111, and an adjustment locking elastic member 1113 for driving the adjustment locking block 1112 to maintain locking with the adjustment locking recess 1111 is provided between the adjustment locking block 1112 and the lower seat connecting member 11. When unlocking, the locking end of the adjustment locking block 1112 can be operated to withdraw from the adjustment locking recess 1111 to achieve unlocking, which is convenient to unlock.

[0095] like Fig.18 , 19 As shown, a blocking and limiting mechanism 110 is provided between the lower seat front link 101 and the lower seat connecting piece 11 located thereon, the lower seat front link 101 is slidably connected to the lower seat rear link 102 through 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, and the blocking and limiting mechanism 110 is configured to block and limit the connecting frame locking mechanism 8 from locking the lower seat front link 101 relative to the lower seat rear link 102 when the lower seat connecting piece 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 is also configured such that when the lower seat connecting member 11 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 so that the connecting frame locking mechanism 8 locks the lower seat front link 101 relative to the lower seat rear link 102. In this embodiment, when the lower seat connecting member 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, so that the frame of the present invention is converted into a common frame, such as Fig.17 As shown, the lower seat connecting frame is more convenient and reliable for loading corresponding articles. When the lower seat connecting member on the lower seat connecting frame is in use and the lower seat front connecting rod is retracted, as shown in FIG. Figure 1 , 13 As shown, the user can directly extend the front connecting rod of the seat relative to the rear connecting rod of the seat to use it as a baby carriage frame without additional unlocking action. Therefore, it has the characteristics of diverse functions, reliable structural design and convenient operation.

[0096] like Fig.18 , 19 As shown, the blocking and limiting mechanism 110 includes a blocking and limiting rod 1101 which is slidably arranged on the lower seat front connecting rod 101 and can be used to block the connecting frame locking block 81 from being inserted into the corresponding connecting frame locking portion 80. A blocking and limiting elastic member 1102 is provided between the blocking and limiting rod 1101 and the lower seat front connecting rod 101 for driving the blocking and limiting rod 1101 to elastically reset. The blocking and limiting mechanism 110 also includes a blocking pushing protrusion 1103 which is provided on the lower seat connecting member 11 and is used to push and cooperate with the blocking and limiting rod 1101. When the lower seat connecting member 11 is in the use state (arranged upward), the blocking pushing protrusion 1103 is aligned with the blocking and limiting rod 1101 and pushes the blocking and limiting rod 1101, so that the blocking end of the blocking and limiting rod 1101 is located on the inner side of the corresponding connecting frame locking portion 80, as shown in FIG. Fig.18 As shown; when the lower seat connector 11 is rotated and adjusted to the non-use state (set downward), the blocking push protrusion 1103 is misaligned with the blocking limit rod 1101, and the push on the blocking limit rod 1101 is released. Then, the blocking limit rod 1101 is automatically reset under the elastic force of the limiting elastic member 1102, so that the blocking end of the blocking limit rod 1101 withdraws from the inner side of the locking portion 80 of the connecting frame, as shown in FIG. Fig.19 shown.

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

[0098] like Figure 7 As shown, in order to ensure that the frame stands stably and reliably 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 multifunctional frame, which can be switched between an unfolded state and a folded state, characterized in that include: A lower seat connecting frame (1) is used to connect at least one seat frame (12) and is arranged transversely along the front-rear direction in an unfolded state; A front foot rod (2), the lower end of which is connected to a front wheel assembly, and the upper portion of which is movably connected to a lower seat connecting frame (1); A rear foot rod (3), the lower end of the rear foot rod (3) is connected to a rear wheel assembly, and the middle portion of the rear foot rod (3) is movably connected to the lower seat connecting frame (1); A push rod assembly (4), wherein the lower end of the push rod assembly (4) is directly or indirectly rotatably connected to the upper end of the front foot rod (2), and the lower part of the push rod assembly (4) is directly or indirectly rotatably connected to the upper end of the rear foot rod (3); A frame locking mechanism (5), the frame locking mechanism (5) being arranged on the frame and used to lock the frame in an unfolded use state; A frame folding and unlocking mechanism (6) is arranged on the frame and is used to link with the frame locking mechanism (5) to release the locked state of the frame so that the frame can be switched from an unfolded use state to a folded use state.

2. A multifunctional frame according to claim 1, characterized in that 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 foot rod (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 foot rod (3); the frame locking mechanism (5) is arranged between the lower end of the extension rod (41) and the upper end of the front foot rod (2), so that after the frame locking mechanism (5) is linked to release the locking state of the extension rod (41) and the front foot rod (2), the push rod body (42) is correspondingly linked to the front foot rod (2) and the rear foot rod (3) during the rotation and folding process relative to the lower seat connecting frame (1), and folds back and approaches the lower seat connecting frame (1).

3. A multifunctional frame according to claim 2, characterized in that The frame locking mechanism (5) comprises a frame locking portion (51) arranged on the front foot rod (2), a frame locking piece (52) movably arranged on the extension rod (41) and locked with the frame locking portion (51), and a frame locking elastic piece (53) for elastically driving the frame locking piece (52) to maintain locking with the frame locking portion (51). The frame folding and unlocking mechanism (6) is arranged on the push rod assembly (4), and the frame locking piece (52) is configured to be linked to the unlocking action of the frame folding and unlocking mechanism (6).

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

5. A multifunctional frame according to claim 2, characterized in that A push rod adjustment seat (40) is provided between the push rod assembly (4) and the rear foot rod (3); the front portion of the push rod adjustment seat (40) is relatively fixedly connected to the extension rod (41), and the rear portion 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), and an angle adjustment mechanism (7) for adjusting the push rod body (42) to switch between a pushing use state and a towing use state is provided between the push rod body (42) and the push rod adjustment seat (40).

6. A multifunctional frame according to claim 5, characterized in that The angle adjustment mechanism (7) comprises an adjustment slide (70) slidably arranged on the push rod body (42) and an adjustment slide rod (71) slidably arranged on the push rod adjustment seat (40); the upper end of the adjustment slide rod (71) is rotatably connected to the adjustment slide (70); the adjustment slide rod (71) is provided with a push adjustment lock hole (72) and a drag adjustment lock hole (73) spaced apart from each other; the angle adjustment mechanism (7) also comprises an angle adjustment lock pin (74) movably arranged on the push rod adjustment seat (40) and used for locking with the push adjustment lock hole (72) or the drag adjustment lock hole (73); one end of the angle adjustment lock pin (74) is directly or indirectly connected to an angle adjustment operating member (741); an angle adjustment elastic member (75) for driving the angle adjustment lock pin (74) to elastically return to its original position is provided between the angle adjustment lock pin (74) and the push rod adjustment seat (40).

7. A multifunctional frame according to any one of claims 1 to 6, characterized in that The lower seat connecting frame (1) comprises a lower seat rear connecting rod (102) and a lower seat front connecting rod (101), wherein the lower seat front connecting rod (101) is slidably and telescopically connected to the lower seat rear connecting rod (102), and the lower seat front connecting rod (101) is configured to be able to slide and telescopically adjust relative to the lower seat rear connecting rod (102) in an unfolded use state, and / or the lower seat front connecting rod (101) is configured to be able to slide and retract relative to the lower seat rear connecting rod (102) in a process of folding the frame.

8. A multifunctional frame according to claim 7, characterized in that A front connecting seat (20) is provided between the front foot rod (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 foot rod (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 foot rod (3) is directly rotatably connected to the middle or rear part of the lower seat rear connecting rod (102), or the rear foot rod (3) is indirectly rotatably connected to the middle or rear part of the lower seat rear connecting rod (102) via a 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 front connecting rod (101) relative to the front connecting seat (20); the connecting frame unlocking mechanism (9) is linked to the connecting frame locking mechanism (8) to link the connecting frame locking mechanism (8) to release the lock between the lower seat front connecting rod (101) and the front connecting seat (20); The connecting frame unlocking mechanism (9) is configured to be able to be linked with the connecting frame locking mechanism (8) to unlock in the unfolded use state so that the front connecting rod (101) of the lower seat can be slidably telescopically adjusted relative to the rear connecting rod (102) of the lower seat, and / or the connecting frame unlocking mechanism (9) is configured to be triggered during the folding process of the frame and to be linked with the connecting frame locking mechanism (8) to unlock so that the front connecting rod (101) of the lower seat can be slidably retracted relative to the rear connecting rod (102) of the lower seat.

9. A multifunctional frame according to claim 8, characterized in that The connecting frame locking mechanism (8) comprises a connecting frame locking portion (80) arranged on the front connecting rod (101) of the lower seat and a connecting frame locking block (81) movably arranged on the front connecting seat (20) and capable of locking with the connecting frame locking portion (80); a connecting frame locking elastic member (82) for keeping the connecting frame locking block (81) locked with the connecting frame locking portion (80) is arranged between the connecting frame locking block (81) and the front connecting seat (20); the connecting frame locking block (81) is configured to be linked to an unlocking action by the connecting frame unlocking mechanism (9).

10. A multifunctional frame according to claim 9, characterized in that The connecting frame unlocking mechanism (9) is located between the front connecting seat (20) and the front foot rod (2) and is configured to be used for linking the connecting frame locking block (81) to unlock when the front foot rod (2) is flipped and 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); 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; a connecting frame unlocking elastic member (92) for driving the connecting frame unlocking slider (91) to elastically return to its original position is provided between the connecting frame unlocking slider (91) and the front connecting seat (20); the connecting frame unlocking mechanism (9) also comprises a connecting frame unlocking driving member (93) arranged on the front foot rod (20) and used for driving the connecting frame unlocking slider (91) to move when the front foot rod (2) is flipped and folded to a preset angle.

11. A multifunctional frame according to claim 10, characterized in that The connecting frame unlocking mechanism (9) comprises a connecting frame unlocking operating member (94), the connecting frame unlocking operating member (94) can be movably exposed from the front connecting seat (20), and the connecting frame unlocking operating member (94) can directly or indirectly drive the connecting frame unlocking slider (91) to move in the unfolded use state, so as to effect the unlocking action of the connecting frame locking block (81).

12. A multifunctional frame according to claim 9, characterized in that The connecting frame unlocking mechanism (9) comprises a connecting frame unlocking slider (91), a connecting frame unlocking elastic member (92), a connecting frame unlocking inclined surface (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 inclined surface (911) is arranged on the connecting frame unlocking slider (91) and the connecting frame locking block (81) so as to be mutually abutted and matched; the connecting frame unlocking elastic member (92) is arranged between the connecting frame unlocking slider (91) and the front connecting seat (20) so as to drive the connecting frame unlocking slider (91) to elastically reset; the connecting frame unlocking operating member (94) is movably exposed from the front connecting seat (20); and the connecting frame unlocking operating member (94) can directly or indirectly drive the connecting frame unlocking slider (91) to move in the unfolded use state, so as to effect the unlocking action of the connecting frame locking block (81).

13. A multifunctional frame according to claim 2, characterized in that The vehicle further comprises an upper seat connecting member (100) and an upper seat linkage member (200); a push rod adjustment seat (40) is provided between the push rod assembly (4) and the rear foot rod (3); the front portion of the push rod adjustment seat (40) is relatively fixedly connected to the extension rod (41), and the rear portion 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 connecting member (100) is rotatably connected to the rear portion of the push rod adjustment seat (40), the upper end of the upper seat linkage member (200) is rotatably connected to the middle portion of the upper seat connecting member (100), and the lower end of the upper seat linkage member (200) is rotatably connected to the upper portion of the rear foot rod (3); the upper seat connecting member (100) is configured to be folded and linked accordingly when the frame is switched from an unfolded use state to a folded use state.

14. A multifunctional frame according to claim 1, characterized in that An upper seat mounting seat (300) is provided on the push rod assembly (4) or the rear foot rod (3); an upper seat connecting piece (100) is provided on the upper seat mounting seat (300) and can be flexibly folded or unfolded relative to the upper seat mounting seat (300); and a connecting piece locking mechanism (400) is provided between the upper seat connecting piece (100) and the upper seat mounting seat (300) for locking and positioning the upper seat connecting piece (100) relative to the upper seat mounting seat (300).

15. A multifunctional frame according to claim 14, characterized in that The connecting member locking mechanism (400) comprises an upper seat connecting locking portion (410) provided on the upper seat connecting member (100) and an upper seat connecting locking member (420) movably provided on the upper seat mounting seat (300) and used for lockingly cooperating with the upper seat connecting locking portion (410); the upper seat mounting seat (300) is also provided with an upper seat connecting operating member (430) for driving the upper seat connecting locking member (420) to act accordingly.

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

17. A multifunctional frame according to claim 16, characterized in that A blocking and limiting mechanism (110) is provided between the lower seat front link (101) and the lower seat connecting piece (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 connecting piece (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) from locking the lower seat front link (101) relative to the lower seat rear link (102).

18. A multifunctional frame according to claim 17, characterized in that The blocking and limiting mechanism (110) is further configured such that when the lower seat connecting piece (11) located on the lower seat front connecting rod (101) is in a non-use state and the lower seat front connecting rod (101) is retracted, the blocking restriction of the blocking and limiting mechanism (110) is released, 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).

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