Frame with adjustable lower seat connecting frame

Abstract

The utility model discloses a frame with an adjustable lower seat connecting frame, the lower seat connecting frame is transversely arranged along the front-back direction to be connected with a seat frame, the lower seat connecting frame comprises a lower seat rear connecting rod and a lower seat front connecting rod which can slide in a relatively telescopic mode, and the lower seat front connecting rod is locked relative to the lower seat rear connecting rod through a connecting frame locking mechanism. And the lower seat front connecting rod is unlocked by linkage of the connecting frame unlocking mechanism and the connecting frame locking mechanism, so that the lower seat front connecting rod can be retracted relative to the lower seat rear connecting rod after being unlocked no matter the frame is in an unfolded use state or in a folding process, convenience is brought to people to use, the whole structure of the folded frame is more compact, and the structure is more compact. The size is minimized, the carrying and storage requirements of a user are met, and meanwhile, the device has the advantages of being easy and convenient to operate and reasonable in design.

Description

Technical field

[0001] The utility model relates to the field of children's safety travel products, in particular to a frame with an adjustable lower seat connecting frame. [Background Technology]

[0002] Currently, strollers on the market generally include a foldable stroller frame and a seat connected to the frame. To accommodate dual-seat functions, the current stroller frames with this function are relatively complex in structure, resulting in complex and inconvenient operation when folding or unfolding the stroller frame. Furthermore, even after folding, the stroller frame still occupies a relatively large volume, hindering portability and transportation.

[0003] In addition, the existing children's stroller frame has a relatively simple function and cannot be used in multiple scenarios, such as converting the children's stroller frame into a luggage cart frame.

[0004] For this reason, the present invention is studied and proposed in view of the above problems. [Utility Model Content]

[0005] The utility model aims to overcome the deficiencies of the prior art and provides a bicycle frame with an adjustable lower seat connecting frame, wherein the lower seat connecting frame is transversely arranged along the front and rear directions to connect the seat frame, and the lower seat connecting frame comprises a lower seat rear connecting rod and a lower seat front connecting rod which can slide telescopically relative to each other, the lower seat front connecting rod is locked relative to the lower seat rear connecting rod by a connecting frame locking mechanism, and the lower seat front connecting rod is unlocked by linking the connecting frame locking mechanism through a connecting frame unlocking mechanism. Therefore, whether the bicycle frame is in an unfolded use state or in a folding process, the lower seat front connecting rod can be retracted relative to the lower seat rear connecting rod after being unlocked, which is convenient for the user to use, and can make the overall structure of the folded bicycle frame more compact and minimized in size, meeting the carrying and storage requirements of the user, and at the same time has the characteristics of simple and convenient operation and reasonable design.

[0006] In order to solve the above technical problems, the utility model provides a bicycle frame with an adjustable lower seat connecting frame, wherein the bicycle frame can be switched between an unfolded use state and a folded use state, comprising:

[0007] A lower seat connecting frame 1 is used to connect the seat frame. The lower seat connecting frame 1 is arranged transversely along the front-to-back direction. The lower seat connecting frame 1 includes a lower seat rear connecting rod 12 and a lower seat front connecting rod 11 slidably connected to the lower seat rear connecting rod 12;

[0008] The frame body 2 includes a front foot rod 21 and a rear foot rod 22. The lower end of the front foot rod 21 is connected to the front wheel assembly, and the upper part of the front foot rod 21 is movably connected to the front part of the lower seat rear link 12; the lower end of the rear foot rod 22 is connected to the rear wheel assembly, and the middle part of the rear foot rod 22 is movably connected to the middle or rear part of the lower seat rear link 12;

[0009] A connecting frame locking mechanism 3, the connecting frame locking mechanism 3 is located between the lower seat front link 11 and the lower seat rear link 12 and is used to lock the lower seat front link 11 relative to the lower seat rear link 12;

[0010] A connecting frame unlocking mechanism 4, located on the vehicle frame, is used to link the connecting frame locking mechanism 3 to unlock the vehicle frame;

[0011] A frame body locking mechanism 5, which is provided on the frame body 2 and is used to lock the frame body 2 in an unfolded state;

[0012] The frame body folding and unlocking mechanism 6 is provided on the frame body 2 and is used to link the frame body locking mechanism 5 to unlock the locked state of the frame body 2 so that the frame body 2 can be switched from the unfolded use state to the folded use state.

[0013] As described above, a frame with an adjustable lower seat connecting frame, the lower seat front connecting rod 11 is configured to automatically slide and retract relative to the lower seat rear connecting rod 12 when the frame body 2 is switched from the unfolded use state to the folded use state; the connecting frame unlocking mechanism 4 is located between the front foot rod 21 and the lower seat rear connecting rod 12 and is configured to be used to link the unlocking action of the connecting frame locking mechanism 3 when the front foot rod 21 is switched from the unfolded use state to the folded use state.

[0014] As described above, a frame with an adjustable lower seat connecting frame is provided between the front foot rod 21 and the front part of the lower seat rear link 12, the lower part of the front connecting seat 210 is rotatably connected to the front foot rod 21, and the upper part of the front connecting seat 210 is connected to the front part of the lower seat rear link 12; the rear foot rod 22 is rotatably connected to the middle or rear part of the lower seat rear link 12; the connecting frame locking mechanism 3 is located between the front connecting seat 210 and the lower seat front link 11 for locking the lower seat front link 11 relative to the front connecting seat 210, and the connecting frame unlocking mechanism 4 is located between the front connecting seat 210 and the front foot rod 21, and the connecting frame unlocking mechanism 4 is configured to be used to link the connecting frame locking mechanism 3 to release the locking state of the lower seat front link 11 when the front foot rod 21 is flipped and folded to a preset angle.

[0015] As described above, a vehicle frame with an adjustable lower seat connecting frame, the connecting frame locking mechanism 3 includes a connecting frame locking portion 30 provided on the front connecting rod 11 of the lower seat and a connecting frame locking block 31 slidably provided on the front connecting seat 210 and capable of locking with the connecting frame locking portion 30, a connecting frame locking elastic member 32 is provided between the connecting frame locking block 31 and the front connecting seat 210 for keeping the connecting frame locking block 31 locked with the connecting frame locking portion 30; the connecting frame locking block 31 is configured to be linked to its unlocking action by the connecting frame unlocking mechanism 4.

[0016] As described above, a vehicle frame with an adjustable lower seat connecting frame, the connecting frame unlocking mechanism 4 includes a connecting frame unlocking slider 41 which can be slid forward and backward on the front connecting seat 210, and the connecting frame unlocking slider 41 and the connecting frame locking block 31 are both provided with connecting frame unlocking inclined surfaces 42 which can cooperate and abut against each other, and a connecting frame unlocking elastic member 43 for driving the connecting frame unlocking slider 41 to elastically reset is provided between the connecting frame unlocking slider 41 and the front connecting seat 210; the connecting frame unlocking mechanism 4 also includes a connecting frame unlocking driving member 44 which is provided on the front foot rod 21 and is used to drive the connecting frame unlocking slider 41 to slide accordingly when the front foot rod 21 is flipped and folded to a preset angle.

[0017] In the vehicle frame with an adjustable lower seat connecting frame as described above, the connecting frame unlocking mechanism 4 further includes a connecting frame unlocking operating member 45 for being operated by a user to unlock the connecting frame locking mechanism 3 .

[0018] As described above, a frame with an adjustable lower seat connecting frame is provided, wherein the lower seat front link 11 is rotatably connected to a lower seat connecting piece 13, and the lower seat connecting piece 13 has a switchable use state and a non-use state. The state in which the lower seat connecting piece 13 is flipped above the upper plane of the lower seat connecting frame 1 and can be connected to the seat frame is the use state, and the state in which the lower seat connecting piece 13 is flipped below the upper plane of the lower seat connecting frame 1 is the non-use state. An adjustment locking mechanism 14 is provided between the lower seat connecting piece 13 and the lower seat front link 11 for locking the lower seat connecting piece 13 relative to the lower seat front link 11 at least in the use state.

[0019] As described above, a frame with an adjustable lower seat connecting frame is further provided between the lower seat connecting member 13 and the lower seat front link 11, which is used to prevent the connecting frame locking mechanism 3 from locking the lower seat front link 11 when the lower seat connecting member 13 is adjusted to the use state and the lower seat front link 11 is retracted relative to the lower seat rear link 12.

[0020] As described above, in a vehicle frame with an adjustable lower seat connecting frame, the locking blocking mechanism 15 is also configured so that when the lower seat connecting member 13 is adjusted to a non-use state and the lower seat front link 11 is retracted relative to the lower seat rear link 12, the blocking of the locking blocking mechanism 15 is limited so that the connecting frame locking mechanism 3 locks the lower seat front link 11 relative to the lower seat rear link 12.

[0021] As described above, a frame with an adjustable lower seat connecting frame, the frame body 2 also includes a push rod assembly 23, the push rod assembly 23 includes a lower push rod 232 and an extension rod 231, the lower end of the extension rod 231 is rotatably connected to the upper end of the front foot rod 21, the upper end of the extension rod 231 is connected to the lower end of the lower push rod 232 to form an L-shaped structure, the lower part of the lower push rod 232 is directly or indirectly rotatably connected to the upper end of the rear foot rod 22, and the push rod assembly 23 is configured to be used to correspondingly link the front foot rod 21 and the rear foot rod 22 to fold backward and fold close to the lower seat connecting frame 1 when the push rod assembly 23 is rotated and folded relative to the lower seat connecting frame 1.

[0022] Compared with the prior art, the bicycle frame with an adjustable lower seat connecting frame of the utility model has the following advantages:

[0023] 1. Whether the frame of the utility model is in the unfolded use state or in the folding process, the front connecting rod of the lower seat can be retracted relative to the rear connecting rod of the lower seat after being unlocked, which is convenient for users to use and can make the overall structure of the frame more compact after folding, and the volume is minimized to meet the carrying and storage requirements of users.

[0024] 2. During the folding process of the frame body, the locking state of the lower seat front link relative to the lower seat rear link is unlocked by the connecting frame unlocking mechanism linked to the connecting frame locking mechanism, so that the lower seat front link automatically slides back to the inner side of the frame body relative to the lower seat rear link under the action of gravity, which is convenient to operate.

[0025] 3. The lower seat connecting frame of the utility model can be connected to the seat frame for use, and the lower seat connecting piece can be flipped to a non-use state to carry shopping baskets, vegetable baskets or other items, meeting different usage needs or different scenarios, and is multifunctional.

[0026] 4. When the front connecting rod of the lower seat of the utility model is connected to the seat frame and retracted, it can be directly pulled out without additional unlocking, which is convenient for users.

Brief Description of the Drawings

[0027] The specific embodiments of the present invention are further described in detail below with reference to the accompanying drawings, wherein:

[0028] Figure 1 This is one of the three-dimensional schematic diagrams of Example 1 of the utility model in the unfolded use state.

[0029] Figure 2 This is the second three-dimensional schematic diagram of Example 1 of the utility model in the unfolded use state.

[0030] Figure 3 It is a side view schematic diagram of embodiment 1 of the utility model in a folded use state.

[0031] Figure 4 This is one of the exploded views of the connecting frame locking mechanism and the connecting frame unlocking mechanism in Example 1 of the present utility model.

[0032] Figure 5 This is the second exploded view of the connecting frame locking mechanism and the connecting frame unlocking mechanism in Example 1 of the present utility model.

[0033] Figure 6 This is an exploded view of the frame body locking mechanism and the frame body folding and unlocking mechanism in Example 1 of the present utility model.

[0034] Figure 7 This is the second three-dimensional schematic diagram of Example 2 of the utility model in the unfolded use state.

[0035] Figure 8 This is an explosion diagram of Example 2 of the utility model when it is in the expanded use state.

[0036] Figure 9 This is the second three-dimensional schematic diagram of Example 2 of the utility model in the unfolded use state.

[0037] Figure 10 This is one of the exploded structural diagrams of the adjustment locking mechanism in Example 2 of the present utility model.

[0038] Figure 11 This is the second schematic diagram of the explosion structure of the adjustment locking mechanism in Example 2 of the present utility model. [Specific implementation method]

[0039] The following describes the embodiments of the present invention in detail with reference to the accompanying drawings.

[0040] like Figure 1-11As shown, the utility model is a frame with an adjustable lower seat connecting frame, which can be switched between an unfolded use state and a folded use state, including a lower seat connecting frame 1, a frame body 2, a connecting frame locking mechanism 3, a connecting frame unlocking mechanism 4, a frame body locking mechanism 5 and a frame body folding unlocking mechanism 6. The lower seat connecting frame 1 is used to connect the seat frame and is arranged horizontally along the front and rear directions. The lower seat connecting frame 1 includes a lower seat rear connecting rod 12 and a lower seat front connecting rod 11 slidably connected to the lower seat rear connecting rod 12; the frame body 2 includes a front foot rod 21 and a rear foot rod 22, the lower end of the front foot rod 21 is connected to a front wheel assembly, and the upper part of the front foot rod 21 is movably connected relative to the front of the lower seat rear connecting rod 12; the lower end of the rear foot rod 22 is connected to a rear wheel assembly, and the middle part of the rear foot rod 22 is movably connected relative to the middle or rear of the lower seat rear connecting rod 12; the connecting frame locking mechanism The mechanism 3 is located between the lower seat front link 11 and the lower seat rear link 12 to lock the lower seat front link 11 relative to the lower seat rear link 12; the connecting frame unlocking mechanism 4 is located on the frame to link the connecting frame locking mechanism 3 to unlock the action; the frame body locking mechanism 5 is provided on the frame body 2 to lock the frame body 2 in the expanded use state; the frame body folding unlocking mechanism 6 is provided on the frame body 2 to link the frame body locking mechanism 5 to unlock the locked state of the frame body 2 so that the frame body 2 can be switched from the expanded use state to the folded use state. When the present invention is folded, the user operates the frame body folding unlocking mechanism 6 to link the frame body locking mechanism 5 to unlock the locked state of the frame body 2, and then operates the frame body to switch from the unfolded use state to the folded use state. At the same time, during the above-mentioned frame body folding process, the frame body is linked to the unlocking action of the connecting frame locking mechanism 3 through the connecting frame unlocking mechanism 4, thereby unlocking the locking state of the lower seat front link relative to the lower seat rear link. When the lower seat front link 11 is in or close to a vertical state, the lower seat front link 11 automatically slides and contracts relative to the lower seat rear link 12 on the inner side of the frame body under the action of gravity, thereby completing the folding operation of the frame, ensuring that the overall structure of the frame is more compact after folding, and the volume is minimized, meeting the user's carrying and storage requirements, and improving the market competitiveness of the product.

[0041] The connecting frame unlocking mechanism 4 is located on the vehicle frame and is used to link the unlocking action of the connecting frame locking mechanism 3. It can be operated manually or linked by the vehicle frame body to meet different operation requirements.

[0042] like Figure 1 、 2 As shown in Figures 7 and 8, the front and rear parts of the lower seat connecting frame 1 are respectively provided with lower seat connecting members 13, and the front and rear lower seat connecting members can be connected to the seat frame to realize the children's car structure with a double seat function.

[0043] like Figure 4 、 5 As shown, in order to facilitate folding and unlocking, the lower seat front link 11 is configured to automatically slide and retract relative to the lower seat rear link 12 when the frame body 2 is switched from the unfolded use state to the folded use state; the connecting frame unlocking mechanism 4 is located between the front foot rod 21 and the lower seat rear link 12 and is configured to be used to link the unlocking action of the connecting frame locking mechanism 3 when the front foot rod 21 is switched from the unfolded use state to the folded use state.

[0044] like Figure 1-8 As shown, a front connecting seat 210 is provided between the front foot rod 21 and the front part of the lower seat rear link 12, the lower part of the front connecting seat 210 is rotatably connected to the front foot rod 21, and the upper part of the front connecting seat 210 is connected to the front part of the lower seat rear link 12; the rear foot rod 22 is rotatably connected to the middle or rear part of the lower seat rear link 12; the connecting frame locking mechanism 3 is located between the front connecting seat 210 and the lower seat front link 11 to lock the lower seat front link 11 relative to the front connecting seat 210, and the connecting frame unlocking mechanism 4 is located between the front connecting seat 210 and the front foot rod 21, and the connecting frame unlocking mechanism 4 is configured to be used to link the connecting frame locking mechanism 3 to release the locking state of the lower seat front link 11 when the front foot rod 21 is flipped and folded to a preset angle. In this embodiment, a rear connecting seat 220 is provided between the rear foot rod 22 and the middle or rear portion of the lower seat rear link 12. The lower portion of the rear connecting seat 220 is rotatably connected to the rear foot rod 22, and the upper portion of the rear connecting seat 220 is connected to the middle or rear portion of the lower seat rear link 12. In the present invention, the lower seat rear link is rotatably connected to the front foot rod via the front connecting seat and to the rear foot rod via the rear connecting seat, respectively. This allows the front and rear foot rods to fit more closely to the lower seat rear link during folding of the bicycle frame, making the folded frame structure more compact and minimizing its volume.

[0045] like Figure 1-6 As shown, for the convenience and reliability of connection, the front connecting seat 210 and the rear connecting seat 220 are provided with a connecting hole sleeve 2101 for the lower seat rear connecting rod 12 to pass through and connect.

[0046] like Figure 4 、 5As shown, for reliable locking, the connecting frame locking mechanism 3 includes a connecting frame locking portion 30 provided on the lower seat front link 11 and a connecting frame locking block 31 slidably provided on the front connecting seat 210 and capable of lockingly cooperating with the connecting frame locking portion 30. A connecting frame locking elastic member 32 is provided between the connecting frame locking block 31 and the front connecting seat 210 for maintaining the connecting frame locking block 31 in locking engagement with the connecting frame locking portion 30. The connecting frame locking block 31 is configured to be unlocked in conjunction with the connecting frame unlocking mechanism 4. The connecting frame locking portion 30 can be a connecting frame locking hole for the connecting frame locking block 31 to be engaged and locked, thereby ensuring reliable locking.

[0047] like Figure 4 、 5 As shown, in order to facilitate unlocking, the connecting frame unlocking mechanism 4 includes a connecting frame unlocking slider 41 which can be slid back and forth on the front connecting seat 210, and the connecting frame unlocking slider 41 and the connecting frame locking block 31 are both provided with connecting frame unlocking inclined surfaces 42 that can cooperate and abut against each other, and a connecting frame unlocking elastic member 43 is provided between the connecting frame unlocking slider 41 and the front connecting seat 210 for driving the connecting frame unlocking slider 41 to elastically reset; the connecting frame unlocking mechanism 4 also includes a connecting frame unlocking driving member 44 which is provided on the front foot rod 21 and is used to drive the connecting frame unlocking slider 41 to slide accordingly when the front foot rod 21 is flipped and folded to a preset angle. During the process of the front foot rod 21 rotating and folding, the front foot rod 21 drives the connecting frame unlocking driving member 44 to rotate, so that the connecting frame unlocking driving member 44 acts on the slider driving inclined surface of the connecting frame unlocking slider 41, thereby driving the connecting frame unlocking slider 41 to slide accordingly relative to the front connecting seat 210. At this time, the connecting frame unlocking slider 41 cooperates with the two connecting frame unlocking inclined surfaces 42 to drive the connecting frame locking block 31 to slide downward relative to the front connecting seat 210 and separate from the connecting frame locking portion 30, thereby releasing the locking state of the lower seat front link 11 relative to the lower seat rear link 12. Afterwards, when the lower seat front link 11 is in or close to a vertical state, it slides relative to the lower seat rear link 12 and contracts under the action of its own gravity or external force. Figure 3 As shown, the lower seat front link 11 automatically slides downward due to its own gravity when the frame is in the folding process.

[0048] like Figure 7-9As shown, to facilitate manual unlocking by the user, the connecting frame unlocking mechanism 4 also includes a connecting frame unlocking operating member 45 for the user to operate to unlock the connecting frame locking mechanism 3. That is, the connecting frame unlocking mechanism 4 of this embodiment can be manually operated by the user, or it can be linked to the front leg rod during folding. When the frame of the utility model is in use, the user manually operates the connecting frame unlocking operating member 45 to activate the connecting frame unlocking mechanism 4 to unlock the connecting frame locking mechanism 3, thereby releasing the locked state of the lower seat front link 11 relative to the lower seat rear link 12. The lower seat front link 11 can then be slid and retracted relative to the lower seat rear link 12 into the inner side of the frame body, allowing the lower seat front link 11 to be adjusted in extension and retraction even when the frame body is in the deployed state. In this new use model, the connecting frame locking mechanism 3 is also configured to lock the lower seat front link 11 relative to the lower seat rear link 12 when the lower seat front link 11 slides and retracts relative to the lower seat rear link 12 to the inner side of the frame body, thereby avoiding the lower seat front link 11 from sliding relative to the lower seat rear link 12 during use and affecting the use effect, ensuring normal use, versatility, and multi-scene use.

[0049] like Figure 4 、 5 As shown, in order to ensure smooth and reliable unlocking, the connecting frame locking block 31 is provided with a locking block guide hole 311 for the corresponding end of the connecting frame unlocking slider 41 to pass through, and the connecting frame unlocking inclined surface 42 on the connecting frame locking block 31 is located on the inner side of the locking block guide hole.

[0050] like Figure 4 、 5 As shown, in order to ensure smooth locking, the locking end of the connecting frame locking block 31 is provided with a locking block guide inclined surface 312. When the lower seat front link 11 switches from the retracted state to the extended state, the connecting frame locking portion 30 is guided by the sliding of the locking block guide inclined surface 312 to elastically avoid the sliding connecting frame locking block 31, so that the lower seat front link 11 is fully extended and then locked by the connecting frame locking block 31.

[0051] like Figure 1 、 9 As shown in -11, for ease of use and switching between multiple usage modes, a lower seat connector 13 is rotatably connected to the lower seat front link 11. The lower seat connector 13 has a switchable use state and a non-use state. The state in which the lower seat connector 13 is flipped above the upper plane of the lower seat connecting frame 1 and can be connected to the seat frame is the use state, and the state in which the lower seat connector 13 is flipped below the upper plane of the lower seat connecting frame 1 is the non-use state. An adjustment locking mechanism 14 is provided between the lower seat connector 13 and the lower seat front link 11 for locking the lower seat connector 13 relative to the lower seat front link 11 at least in the use state. Figure 1 、7 As shown in Figures 9, the lower seat connecting frame of the present invention can be connected to the seat frame for use, and the lower seat connecting piece can be flipped over to a non-use state to carry a shopping basket, a vegetable basket or other items.

[0052] like Figure 10 、 11 As shown, the adjustment locking mechanism 14 includes but is not limited to an adjustment locking recess 141 provided on the lower seat front link 11 and an adjustment locking block 142 slidably provided on the lower seat connecting member 13 and configured to lock with the adjustment locking recess 141. An adjustment locking elastic member 143 is provided between the adjustment locking block 142 and the lower seat connecting member 13 for driving the adjustment locking block 142 to maintain locking engagement with the adjustment locking recess 141. When unlocking, unlocking can be achieved by operating the locking end of the adjustment locking block 142 to withdraw from the adjustment locking recess 141, which is convenient for unlocking.

[0053] like Figure 10 As shown, in order to facilitate the direct pulling out of the lower seat front link 11 when the seat frame is connected without additional unlocking, which is convenient for use, a locking blocking mechanism 15 is also provided between the lower seat connector 13 and the lower seat front link 11, which blocks the connecting frame locking mechanism 3 from locking the lower seat front link 11 when the lower seat connector 13 is adjusted to the use state and the lower seat front link 11 is retracted relative to the lower seat rear link 12.

[0054] like Figure 11 As shown, in order to ensure the reliable use of the frame in other states, the locking blocking mechanism 15 is also configured to be limited so that when the lower seat connector 13 is adjusted to the non-use state and the lower seat front link 11 is retracted relative to the lower seat rear link 12, the blocking of the locking blocking mechanism 15 is limited so that the connecting frame locking mechanism 3 locks the lower seat front link 11 relative to the lower seat rear link 12.

[0055] like Figure 10 、 11As shown, the locking blocking mechanism 15 includes but is not limited to a locking blocking rod 151 which is slidably provided on the lower seat front link 11 and is used to block the connecting frame locking block 31 from locking with the corresponding connecting frame locking portion 30 (the connecting frame locking portion located in front of the lower seat front link 11); a locking blocking elastic member 152 is provided between the locking blocking rod 151 and the lower seat front link 11 for driving the locking blocking rod 151 to elastically reset; the locking blocking mechanism 15 also includes a locking blocking pushing protrusion 153 provided on the lower seat connecting member 13 for pushing and cooperating with the locking blocking rod 151. When the lower seat connector 13 is in use, the locking blocking pushing protrusion 153 is aligned with the corresponding end of the locking blocking rod 151 and pushes the locking blocking rod 151, so that the blocking end of the locking blocking rod 151 is located on the inner side of the corresponding connecting frame locking portion. When the lower seat front connecting rod 11 is retracted relative to the lower seat rear connecting rod 12, the connecting frame locking block 31 cannot be stuck in the corresponding connecting frame locking portion 30. When the lower seat connector 13 is in the non-use state (set downward), the locking blocking pushing protrusion 153 is misaligned with the corresponding end of the locking blocking rod 151, and the pushing of the locking blocking rod 151 is released. The locking blocking rod 151 is automatically reset under the elastic force of the locking blocking elastic member 152, so that the blocking end of the locking blocking rod 151 withdraws from the inner side of the corresponding connecting frame locking portion. When the lower seat front connecting rod 11 retracts relative to the lower seat rear connecting rod 12, the connecting frame locking block 31 can be stuck in the corresponding connecting frame locking portion 30.

[0056] like Figure 1-3 As shown in Figures 7-9, in order to facilitate folding and unfolding, the frame body 2 also includes a push rod assembly 23, which includes a lower push rod 232 and an extension rod 231. The lower end of the extension rod 231 is rotatably connected to the upper end of the front foot rod 21, and the upper end of the extension rod 231 is connected to the lower end of the lower push rod 232 to form an L-shaped structure. The lower part of the lower push rod 232 is rotatably connected to the upper end of the rear foot rod 22 directly or indirectly. The push rod assembly 23 is configured to be used to correspondingly link the front foot rod 21 and the rear foot rod 22 to fold backward and fold close to the lower seat connecting frame 1 when the push rod assembly 23 is rotated and folded relative to the lower seat connecting frame 1. When folding, the upper part of the lower push rod 232 is operated to flip downward and rotate toward the side of the lower seat connecting frame for folding. The lower push rod 232 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 fold toward the side of the lower seat connecting frame. At the same time, the lower push rod 232 drives the upper end of the front foot rod to flip forward through the extension rod 231, causing the lower part of the front foot rod to flip backward and fold toward the side of the lower seat connecting frame, so that the entire frame after folding has a flat structure.

[0057] like Figure 1 、 2As shown in Figures 7-9, in order to ensure the stability and reliability of the frame structure and to maximize the use of space when the frame is unfolded, the extension rod 231 is configured to be parallel to the rear foot rod 22 when the frame body 2 is in the unfolded use state, and the front foot rod 21, the extension rod 231 and the lower push rod 232 are connected to form an inverted Z-shaped structure, and the lower seat connecting frame 1 is arranged horizontally.

[0058] like Figure 1-3 As shown in Figures 7-9, in order to make the frame structure more compact and minimize the volume after folding, the push rod assembly 23 also includes an upper push rod 233 that is movably connected to the lower push rod 232. An upper push rod locking mechanism for locking the upper push rod 233 relative to the lower push rod 232 is provided between the upper push rod 233 and the lower push rod 232. 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 233. In this embodiment, the lower end of the upper push rod 233 is slidably and telescopically connected to the upper end of the lower push rod 232. 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 233 relative to the lower push rod 232, and then the upper push rod 233 is retracted into the lower push rod 232, as shown in Figures 7-9. Figure 3 When unfolding, operate the upper push rod 233 relative to the lower push rod 4 to extend to the set length, such as Figure 1 、 2 7-9, it is easy to operate and has a reasonable design, which can meet the needs of pushers of different heights. The upper push rod locking mechanism of the utility model includes but is not limited to a plurality of upper push rod locking holes arranged at intervals on the lower push rod 232 and an upper push rod locking latch slidably provided on the upper push rod 233 and insertable into the corresponding upper push rod locking holes. A latch reset elastic member is provided between the upper push rod locking latch and the upper push rod 233 to keep the upper push rod locking latch locked with the corresponding upper push rod locking hole; 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 provided on the upper push rod 233 and an upper push rod unlocking linkage for connecting the upper push rod unlocking button and the upper push rod locking latch.

[0059] like Figure 6As shown, in order to facilitate locking and unlocking the extension rod relative to the front foot rod, the frame body locking mechanism 5 includes a frame locking portion 51 provided on the front foot rod 21, a frame locking member 52 movably provided on the extension rod 231 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 the locked engagement with the frame locking portion 51. The frame locking member 52 is configured to be unlocked in conjunction with the frame body folding and unlocking mechanism 6. In this embodiment, the middle portion of the frame locking member 52 is rotatably provided on the extension rod 231, 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 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 231, ensuring reliable locking.

[0060] like Figure 1 、 2 As shown in Figures 6-9, the frame body folding and unlocking mechanism 6 is disposed on the push rod assembly 23. The frame body folding and unlocking mechanism 6 includes a frame folding and unlocking member 61 movably disposed on the push rod assembly 23 and a frame folding and unlocking linkage member 62 that penetrates the push rod assembly 23. 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. During unlocking, when a user operates the frame folding and unlocking member 61 to move relative to the push rod assembly 23, the frame folding and unlocking member 61, via the frame folding and unlocking linkage member 62, drives the frame locking member 52 to move accordingly, causing the locking end of the frame locking member 52 to separate from the frame locking portion 51, thereby releasing the locking state of the extension rod 231 relative to the front leg rod 21. In this embodiment, the frame folding and unlocking member 61 is slidably disposed on the push rod assembly 23. The frame folding and unlocking linkage member 62 can be a steel rope or the like.

[0061] like Figure 1 、 2 As shown in Figures 6-9, the frame body locking mechanism 5 and the frame body 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 body folding and unlocking mechanisms 6 and simultaneously links the unlocking actions of the left and right frame body 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.

[0062] The two frame body locking mechanisms 5 on the left and right sides may also be configured to be simultaneously linked by a frame body folding and unlocking mechanism 6 to improve the unlocking efficiency.

Claims

1. A bicycle frame with an adjustable lower seat connecting frame, wherein the bicycle frame 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 the seat frame, the lower seat connecting frame (1) is arranged transversely along the front-back direction, and the lower seat connecting frame (1) includes a lower seat rear connecting rod (12) and a lower seat front connecting rod (11) slidably connected to the lower seat rear connecting rod (12); A vehicle frame body (2), the vehicle frame body (2) comprising a front foot rod (21) and a rear foot rod (22), the lower end of the front foot rod (21) being connected to a front wheel assembly, the upper portion of the front foot rod (21) being movably connected relative to the front portion of the lower seat rear connecting rod (12); the lower end of the rear foot rod (22) being connected to a rear wheel assembly, the middle portion of the rear foot rod (22) being movably connected relative to the middle portion or the rear portion of the lower seat rear connecting rod (12); A connecting frame locking mechanism (3), the connecting frame locking mechanism (3) being located between the lower seat front connecting rod (11) and the lower seat rear connecting rod (12) for locking the lower seat front connecting rod (11) relative to the lower seat rear connecting rod (12); A connecting frame unlocking mechanism (4), the connecting frame unlocking mechanism (4) being located on the vehicle frame and being used to link the connecting frame locking mechanism (3) to an unlocking action; A vehicle frame body locking mechanism (5), the vehicle frame body locking mechanism (5) being arranged on the vehicle frame body (2) and being used to lock the vehicle frame body (2) in an unfolded use state; A frame body folding and unlocking mechanism (6) is provided on the frame body (2) and is used to link with the frame body locking mechanism (5) to unlock the locked state of the frame body (2) so that the frame body (2) can be switched from an unfolded use state to a folded use state.

2. A vehicle frame with an adjustable lower seat connection frame according to claim 1, characterized in that The lower seat front connecting rod (11) is configured to automatically slide and retract relative to the lower seat rear connecting rod (12) when the frame body (2) switches from an unfolded use state to a folded use state; the connecting frame unlocking mechanism (4) is located between the front foot rod (21) and the lower seat rear connecting rod (12) and is configured to be used to link the unlocking action of the connecting frame locking mechanism (3) when the front foot rod (21) switches from an unfolded use state to a folded use state.

3. A vehicle frame with an adjustable lower seat connection frame according to claim 2, characterized in that A front connecting seat (210) is provided between the front foot rod (21) and the front portion of the lower seat rear link (12); the lower portion of the front connecting seat (210) is rotatably connected to the front foot rod (21); the upper portion of the front connecting seat (210) is connected to the front portion of the lower seat rear link (12); the rear foot rod (22) is rotatably connected to the middle or rear portion of the lower seat rear link (12); the connecting frame locking mechanism (3) is located between the front connecting seat (210) and the lower seat front link (11) for locking the lower seat front link (11) relative to the front connecting seat (210); the connecting frame unlocking mechanism (4) is located between the front connecting seat (210) and the front foot rod (21); the connecting frame unlocking mechanism (4) is configured to link the connecting frame locking mechanism (3) to release the locking state of the lower seat front link (11) when the front foot rod (21) is flipped and folded to a preset angle.

4. A vehicle frame with an adjustable lower seat connection frame according to claim 3, characterized in that The connecting frame locking mechanism (3) comprises a connecting frame locking portion (30) provided on the front connecting rod (11) of the lower seat and a connecting frame locking block (31) slidably provided on the front connecting seat (210) and capable of locking with the connecting frame locking portion (30); a connecting frame locking elastic member (32) for keeping the connecting frame locking block (31) locked with the connecting frame locking portion (30) is provided between the connecting frame locking block (31) and the front connecting seat (210); the connecting frame locking block (31) is configured to be linked to the unlocking action of the connecting frame unlocking mechanism (4).

5. A vehicle frame with an adjustable lower seat connection frame according to claim 4, characterized in that The connecting frame unlocking mechanism (4) comprises a connecting frame unlocking slider (41) slidably arranged on the front connecting seat (210), the connecting frame unlocking slider (41) and the connecting frame locking block (31) are both provided with connecting frame unlocking inclined surfaces (42) that can cooperate and abut against each other, and a connecting frame unlocking elastic member (43) for driving the connecting frame unlocking slider (41) to elastically reset is provided between the connecting frame unlocking slider (41) and the front connecting seat (210); the connecting frame unlocking mechanism (4) also comprises a connecting frame unlocking driving member (44) provided on the front foot rod (21) and used to drive the connecting frame unlocking slider (41) to slide accordingly when the front foot rod (21) is flipped and folded to a preset angle.

6. A vehicle frame with an adjustable lower seat connection frame according to claim 5, characterized in that The connecting frame unlocking mechanism (4) further comprises a connecting frame unlocking operating member (45) for being operated by a user to cause the connecting frame locking mechanism (3) to unlock.

7. A vehicle frame with an adjustable lower seat connecting frame according to any one of claims 1 to 6, characterized in that A lower seat connecting member (13) is rotatably connected to the lower seat front connecting rod (11), and the lower seat connecting member (13) has a switchable use state and a non-use state. The state in which the lower seat connecting member (13) is flipped above the upper plane of the lower seat connecting frame (1) and can be connected to the seat frame is the use state, and the state in which the lower seat connecting member (13) is flipped below the upper plane of the lower seat connecting frame (1) is the non-use state. An adjustment locking mechanism (14) is provided between the lower seat connecting member (13) and the lower seat front connecting rod (11) for locking the lower seat connecting member (13) relative to the lower seat front connecting rod (11) at least in the use state.

8. A vehicle frame with an adjustable lower seat connection frame according to claim 7, characterized in that A locking blocking mechanism (15) is also provided between the lower seat connecting member (13) and the lower seat front connecting rod (11) to block the connecting frame locking mechanism (3) from locking the lower seat front connecting rod (11) when the lower seat connecting member (13) is adjusted to a use state and the lower seat front connecting rod (11) is retracted relative to the lower seat rear connecting rod (12).

9. A vehicle frame with an adjustable lower seat connection frame according to claim 8, characterized in that The locking and blocking mechanism (15) is further configured such that when the lower seat connector (13) is adjusted to a non-use state and the lower seat front link (11) is retracted relative to the lower seat rear link (12), the blocking of the locking and blocking mechanism (15) is limited, so that the connecting frame locking mechanism (3) locks the lower seat front link (11) relative to the lower seat rear link (12).

10. A vehicle frame with an adjustable lower seat connecting frame according to claim 1 or 2 or 3 or 4 or 5 or 6 or 9, characterized in that The frame body (2) further comprises a push rod assembly (23), the push rod assembly (23) comprising a lower push rod (232) and an extension rod (231), the lower end of the extension rod (231) being rotatably connected to the upper end of the front foot rod (21), the upper end of the extension rod (231) being connected to the lower end of the lower push rod (232) in an L-shaped structure, the lower portion of the lower push rod (232) being rotatably connected to the upper end of the rear foot rod (22) directly or indirectly, and the push rod assembly (23) being configured to be used for correspondingly linking the front foot rod (21) and the rear foot rod (22) to be respectively folded backward and folded toward the lower seat connecting frame (1) when the push rod assembly (23) is rotated and folded relative to the lower seat connecting frame (1).

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