Baby stroller frame convenient to fold

Abstract

The utility model discloses a stroller frame convenient to fold, which is characterized in that a handle rod can be locked in an unfolded state and a folded state relative to a push rod through a handle rod locking mechanism, so that the stability of the handle rod in the folded state or the unfolded state is effectively ensured, and the use safety and reliability are ensured; in addition, the push rod can link the front foot rod to correspondingly rotate and unfold or correspondingly rotate and fold through the rear linkage rod and the front linkage rod, folding is convenient, and operation is convenient.

Description

[Technical field]

[0001] The utility model relates to the technical field of baby carriages, in particular to a child carriage frame which is convenient to fold. [Background technology]

[0002] When parents take their babies out, they usually bring a stroller. Traditional strollers are large in size and have no folding function or are still very large after folding, so they are not suitable for long-distance or long-term family travel. Therefore, portable folding strollers that are easy to fold have been widely used as a means of transportation for babies and young children on the market.

[0003] 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 getting on and off the car or even on and off the plane, of course, it is hoped that the size of the stroller after folding is as small as possible; even when it is not in use and stored at home, the smaller the size, the less space it takes up.

[0004] However, most of the existing baby strollers still have the following defects:

[0005] 1. It cannot be fully folded. After folding, the stroller still occupies a large volume, which is not conducive to carrying and transporting.

[0006] 2. Complex structure and high production cost.

[0007] 3. The user needs to fold several groups of components separately, which is time-consuming and laborious.

[0008] For this reason, the present invention is studied and proposed in view of the above-mentioned problems. [Utility Model Content]

[0009] The utility model aims to overcome the deficiencies of the prior art and provide a child stroller frame which is easy to fold and fold. The handlebar locking mechanism can lock the handlebar relative to the push rod in an expanded state and a folded state, effectively ensuring the stability of the handlebar in the folded state or the expanded state, and ensuring safe and reliable use. In addition, the push rod can be linked with the front foot rod to rotate and expand or rotate and fold accordingly through the rear linkage rod and the front linkage rod, and the folding and folding are convenient and easy to operate.

[0010] The utility model is realized by the following technical solutions:

[0011] A stroller frame that is easy to fold and can be switched between a folded state and an unfolded state, comprising: a rear foot rod 2; a front foot rod 1, wherein the upper end of the front foot rod 1 is pivotally connected to the upper end of the rear foot rod 2 via a pivot axis A; a push rod 3, wherein the lower end of the push rod 3 is pivotally connected to the upper end of the rear foot rod 2 via a pivot axis B, and a push rod sliding member 31 is slidably provided on the push rod 3; a handlebar 4, wherein the lower end of the handlebar 4 is rotatably connected to the upper end of the pushbar 3, a handlebar locking mechanism 40 is provided between the handlebar 4 and the pushbar 3 for locking the handlebar 4 in an unfolded state and a folded state relative to the pushbar 3, and a locking mechanism 40 is provided on the handlebar 4 for linking the unlocking action of the handlebar locking mechanism 40 A handlebar unlocking mechanism 41; a rear linkage rod 5, wherein the upper end of the rear linkage rod 5 is rotatably connected to the push rod sliding member 31, and the middle portion of the rear linkage rod 5 is pivotally connected to the upper portion of the rear foot rod 2 via a pivot axis C; a front linkage rod 6, wherein the front end of the front linkage rod 6 is rotatably connected to the front foot rod 1, and the rear end of the front linkage rod 6 is rotatably connected to the lower end of the rear linkage rod 5; a frame locking mechanism 32, wherein the frame locking mechanism 32 is located between the push rod sliding member 31 and the push rod 3 for locking the push rod sliding member 31 relative to the push rod 3; a frame unlocking mechanism 33, wherein the frame unlocking mechanism 33 is located on the push rod 3 for linking the unlocking action of the frame locking mechanism 32 to release the locking state of the push rod sliding member 31 relative to the push rod 3.

[0012] As described above, a stroller frame that is easy to fold also includes a seat slide 71, which is pivotally connected to the lower part of the push rod 3 or the upper part of the rear leg rod 2 through a pivot axis D, and the pivot axis D is located above the pivot axis C when the stroller frame is in the unfolded state; a seat rod 7, the rear end of which is rotatably connected to the upper part of the rear linkage rod 5, and the seat rod 7 is slidably connected to the seat slide 71.

[0013] The conveniently foldable stroller frame as described above further comprises a flexible connecting belt 8 for a user to pull when the stroller frame is in the folded state, and a portion of the flexible connecting belt 8 is exposed above the seat rod 7 .

[0014] In the above-mentioned easy-to-fold stroller frame, the flexible connecting belt 8 is wrapped around the seat rod 7, and the end of the flexible connecting belt 8 is connected to the pivotal portion between the front linkage rod 6 and the rear linkage rod 5; or the end of the flexible connecting belt 8 is connected to the rear end of the corresponding front linkage rod 6 or the lower end of the corresponding rear linkage rod 5.

[0015] In the above-mentioned conveniently foldable baby stroller frame, the two rear linking rods 5 or the two front linking rods 6 are connected via a connecting cross bar 9 .

[0016] In the conveniently foldable child stroller frame as described above, the pivot axis B is configured to be offset from the pivot axis A.

[0017] As described above, a stroller frame that is easy to fold, the front foot rod 1 includes a front foot straight section 11 and a front foot extension section 12 connected to the upper end of the front foot straight section 11 and extending and bending toward one side of the rear foot rod 2, the upper end of the rear foot rod 2 has a front foot connecting recess 20 for inserting the corresponding end of the front foot extension section 12, and the upper end of the rear foot rod 2 also has a push rod connecting section 21 extending backward and used to be pivotally connected to the lower end of the push rod 3; the pivot axis A is located between the front foot extension section 12 and the upper end of the rear foot rod 2, and the pivot axis B is located at the lower end of the push rod 3. and a push rod connecting section 21; or, the rear foot rod 2 includes a rear foot straight section and a rear foot extension section connected to the upper end of the rear foot straight section and extending and bending toward one side of the front foot rod 1, the upper end of the front foot rod 1 has a rear foot connecting recess for inserting the corresponding end of the rear foot extension section, and a push rod connecting section 21 extending backwards and pivotally connected to the lower end of the push rod 3 is provided between the rear foot straight section and the rear foot extension section; the pivot axis A is located between the upper end of the front foot rod 1 and the rear foot extension section, and the pivot axis B is located between the lower end of the push rod 3 and the push rod connecting section 21.

[0018] As described above, in the easily foldable stroller frame, the frame unlocking mechanism 33 is configured to be linked to the corresponding unlocking action by the handlebar 4 when the handlebar 4 is rotated and folded to a preset angle relative to the push rod 3, thereby linking the unlocking action of the frame locking mechanism 32.

[0019] As described above, a stroller frame that is easy to fold, the frame locking mechanism 32 includes a frame locking hole 321 provided on the push rod sliding member 31 and a frame locking block 322 slidably provided on the push rod 3 and insertable into the frame locking hole 321, a locking block reset member 323 for driving the frame locking block 322 to elastically slide and reset is provided between the frame locking block 322 and the push rod 3; the frame locking block 322 is configured to be linked to a corresponding unlocking action by the frame unlocking mechanism 33.

[0020] As described above, a stroller frame that is easy to fold is provided, wherein the frame unlocking mechanism 33 includes a frame unlocking block 331 that is movably arranged between the upper end of the push rod 3 and the lower end of the handlebar 4 and can be linked to a corresponding action by the handlebar 4 when the handlebar 4 is rotated and folded relative to the push rod 3. The frame unlocking block 331 is connected to the frame locking block 322 via a frame unlocking pull rope 332.

[0021] As described above, a stroller frame that is easy to fold, the handlebar locking mechanism 40 includes a handlebar locking groove 401 provided on opposite sides of the upper end of the push rod 3 and the lower end of the handlebar 4, and a handlebar locking gear 402 slidably provided between the upper end of the push rod 3 and the lower end of the handlebar 4 and capable of being simultaneously inserted into the handlebar locking groove 401 of the upper end of the push rod 3 and the lower end of the handlebar 4; the handlebar locking mechanism 40 also includes a locking gear reset member for driving the handlebar locking gear 402 to elastically slide and reset; the handlebar unlocking mechanism 41 It includes a handlebar unlocking dial rotatably arranged between the lower end of the handlebar 4 and the handlebar locking gear 402 and used to push the handlebar locking gear 402 to perform a corresponding unlocking action. The handlebar unlocking dial and the opposite sides of the lower end of the handlebar 4 are provided with unlocking inclined surfaces for cooperating with each other to drive the handlebar unlocking dial to slide axially when the handlebar unlocking dial rotates. The handlebar unlocking mechanism 41 also includes a handlebar unlocking button arranged at the upper end of the handlebar 4, and the handlebar unlocking button is connected to the handlebar unlocking dial through a handlebar unlocking rope.

[0022] As described above, in a stroller frame that is easy to fold, the handlebar locking mechanism 40 includes a handlebar locking hole 403 eccentrically arranged on the corresponding side of the upper end of the push rod 3 or the lower end of the handlebar 4, and a handlebar locking pin 404 that can be elastically arranged at the lower end of the handlebar 4 or the upper end of the push rod 3 and can be inserted into the handlebar locking hole 403.

[0023] In the above-mentioned conveniently foldable child stroller frame, the push rod sliding member 31 is a push rod sliding sleeve slidably mounted on the push rod 3 .

[0024] Compared with the prior art, the utility model has the following advantages:

[0025] 1. When the utility model is folded, the unlocking action of the handlebar rod unlocking mechanism is linked to the unlocking action of the handlebar rod locking mechanism to release the locking state of the handlebar rod relative to the push rod. At this moment, the handlebar rod can be rotated relative to the push rod and folded toward the side of the push rod. During the above-mentioned rotation and folding process of the handlebar rod, the handlebar rod is linked to the frame unlocking mechanism for corresponding action, thereby causing the frame unlocking mechanism to be linked to the unlocking action of the frame locking mechanism to release the locking state of the push rod sliding member relative to the push rod. Then, the push rod drives the handlebar rod to flip downward relative to the rear foot rod around the pivot axis B and fold toward the side of the rear foot rod. During the above-mentioned downward flipping process of the push rod, the push rod acts on the upper end of the rear linkage rod through the push rod sliding member. The front foot rod is then turned backwards and folded toward the side of the rear foot rod, thereby completing the folding of the child stroller frame. To this end, the utility model only requires the user to manually operate the handlebar unlocking mechanism to release the handlebar, and then the linkage push rod sliding member is released during the folding process of the handlebar, thereby releasing the locked state of the child stroller frame. The utility model has the characteristics of convenient folding and unfolding and easy operation. At the same time, the structure of the whole stroller after folding is more compact and the volume is minimized, which meets the carrying and storage requirements of the user, including the size requirement of carrying on an airplane after folding.

[0026] 2. By cleverly and reasonably setting the linkage components and the frame locking mechanism, that is, by controlling the locking and unlocking of the push rod sliding part, the stroller frame can be easily folded, and the unlocking of the entire vehicle is easy to operate and has a simple structure, which is convenient for users to use, and minimizes the number of rods in the vehicle, effectively reducing the weight of the vehicle and the production cost, which is conducive to improving product competitiveness.

[0027] 3. The seat pole is folded together with the whole vehicle, so there is no need to remove the seat pole or fold it manually by the user, which is more convenient for users.

[0028] 4. By providing a flexible connecting belt, it is more convenient for users to lift the stroller frame in the folded state. At the same time, the end of the flexible connecting belt is connected to the front linkage rod or the rear linkage rod. When the user lifts the stroller, the flexible connecting belt passes through the front linkage rod and the rear linkage rod to make the front foot rod and the push rod have a movement tendency to move towards each other, thereby ensuring the stability of the whole vehicle structure in the folded state.

[0029] 5. By connecting the crossbar, the synchronization between the two rear linkage rods or the two front linkage rods can be ensured, while the structural strength can be improved.

Brief Description of the Drawings

[0030] The specific implementation of the utility model is further described in detail below with reference to the accompanying drawings, wherein:

[0031] Figure 1It is a schematic diagram of the three-dimensional structure of Example 1 of the utility model in an unfolded state.

[0032] Figure 2 This is one of the three-dimensional structural schematic diagrams of Example 1 of the utility model in the folding process.

[0033] Figure 3 This is the second schematic diagram of the three-dimensional structure of the embodiment 1 of the utility model in the folding process.

[0034] Figure 4 This is the third schematic diagram of the three-dimensional structure of the embodiment 1 of the utility model in the folding process.

[0035] Figure 5 It is a schematic diagram of the three-dimensional structure of Example 1 of the utility model in a folded state.

[0036] Figure 6 It is a side view structural schematic diagram of Example 1 of the utility model in a folded state.

[0037] Figure 7 It is a schematic cross-sectional structural diagram of Example 1 of the utility model in an unfolded state.

[0038] Figure 8 This is one of the explosion structure schematic diagrams of Example 1 of the utility model.

[0039] Fig. 9 This is the second schematic diagram of the explosion structure of Example 1 of the utility model.

[0040] Fig.10 It is a schematic diagram of the three-dimensional structure of Example 2 of the utility model in an unfolded state.

[0041] Fig.11 It is a schematic diagram of the three-dimensional structure of Example 2 of the utility model in a folded state.

[0042] Fig.12 This is a schematic diagram of the explosion structure of Example 2 of the utility model. [Specific implementation method]

[0043] The implementation modes of the present utility model are described in detail below in conjunction with the accompanying drawings.

[0044] like Figure 1-12As shown, the utility model provides a stroller frame that is easy to fold and can be switched between a folded state and an unfolded state, comprising: a rear foot rod 2; a front foot rod 1, wherein the upper end of the front foot rod 1 is pivotally connected to the upper end of the rear foot rod 2 via a pivot axis A; a push rod 3, wherein the lower end of the push rod 3 is pivotally connected to the upper end of the rear foot rod 2 via a pivot axis B, and a push rod sliding member 31 is slidably provided on the push rod 3; a handlebar 4, wherein the lower end of the handlebar 4 is rotatably connected to the upper end of the pushbar 3, a handlebar locking mechanism 40 is provided between the handlebar 4 and the pushbar 3 for locking the handlebar 4 in the unfolded state and the folded state relative to the pushbar 3, and a release mechanism 40 is provided on the handlebar 4 for linking the handlebar locking mechanism 40 The handlebar unlocking mechanism 41 of the locking action; the rear linkage rod 5, the upper end of the rear linkage rod 5 is rotatably connected to the push rod sliding member 31, and the middle part of the rear linkage rod 5 is pivotally connected to the upper part of the rear foot rod 2 through the pivot axis C; the front linkage rod 6, the front end of the front linkage rod 6 is rotatably connected to the front foot rod 1, and the rear end of the front linkage rod 6 is rotatably connected to the lower end of the rear linkage rod 5; the frame locking mechanism 32, the frame locking mechanism 32 is located between the push rod sliding member 31 and the push rod 3 to lock the push rod sliding member 31 relative to the push rod 3; the frame unlocking mechanism 33, the frame unlocking mechanism 33 is located on the push rod 3 to be linked to the unlocking action of the frame locking mechanism 32 to release the locking state of the push rod sliding member 31 relative to the push rod 3. The utility model cleverly and reasonably arranges the linkage components (the push rod sliding member, the rear linkage rod and the front linkage rod) and the frame locking mechanism, that is, by controlling the locking and unlocking of the push rod sliding member, the frame of the child stroller can be conveniently folded, and the unlocking of the entire stroller is easy to operate and has a simple structure, which is convenient for users to use, and the number of rods of the entire stroller is minimized to the greatest extent, effectively reducing the weight of the entire stroller and the production cost, which is conducive to improving product competitiveness.

[0045] When the utility model is folded, the unlocking mechanism of the handlebar rod is operated to link the unlocking action of the handlebar rod locking mechanism to release the locking state of the handlebar rod relative to the push rod. At this moment, the handlebar rod can be rotated relative to the push rod and folded toward one side of the push rod. Figure 2 , 3 As shown, during the above-mentioned rotation and folding process of the handlebar rod, the handlebar rod is linked to the frame unlocking mechanism to act accordingly, thereby causing the frame unlocking mechanism to be linked to the frame locking mechanism to unlock the push rod sliding member relative to the push rod to release the locking state of the push rod. Then, the push rod drives the handlebar rod to flip downward relative to the rear foot rod around the pivot axis B and fold toward the side of the rear foot rod, as shown in FIG. Figure 4 As shown, during the downward flipping process of the push rod, the push rod acts on the upper end of the rear linkage rod through the push rod sliding member to rotate downward around the pivot axis C, so that the lower end of the rear linkage rod drives the rear end of the front linkage rod to rotate upward around the pivot axis C, as shown in FIG. Figure 4 As shown, the front foot rod is turned backward and folded toward the side of the rear foot rod, thereby completing the folding work of the child stroller frame. Figure 5 , 6 As shown in Figures 11, the utility model only requires the user to manually operate the handlebar unlocking mechanism to release the handlebar, and then the push rod sliding member is linked to release the lock during the folding process of the handlebar to release the locked state of the child stroller frame. The utility model has the characteristics of convenient folding and unfolding and easy operation. At the same time, the structure of the whole stroller after folding is more compact and the volume is minimized, which meets the carrying and storage requirements of the user, including the size requirement for carrying on an airplane after folding.

[0046] The utility model locks the handlebar in the unfolded state and the folded state through the handlebar locking mechanism 40, effectively ensuring the stability of the handlebar in the folded state or the unfolded state, and ensuring safe and reliable use.

[0047] like Figure 1-6 As shown in Figures 8, 10 and 11, the push rod sliding member 31 is a push rod sliding sleeve slidably mounted on the push rod 3, which can ensure that the push rod sliding member 31 slides stably and smoothly along the set direction, thereby ensuring the smooth folding and unfolding of the child stroller frame.

[0048] like Figure 1 As shown, the pivot axis B is configured to be offset from the pivot axis A. In other embodiments, the pivot axis B and the pivot axis A may also be coaxially arranged.

[0049] like Figure 1-8 , 10, and 11, it also includes a seat slide 71, the seat slide 71 is pivotally connected to the lower part of the push rod 3 or the upper part of the rear foot rod 2 through a pivot axis D, and the pivot axis D is located above the pivot axis C when the child stroller frame is in the unfolded state; the seat rod 7, the rear end of the seat rod 7 is rotatably connected to the upper part of the rear linkage rod 5, and the seat rod 7 is slidably connected to the seat slide 71. The seat rod of this embodiment is folded together when the whole vehicle is folded, and there is no need to remove the seat rod or require the user to fold it manually, which is more convenient for users to use. Among them, in order to ensure that the seat rod is smoothly and stably folded and unfolded, the seat slide 71 is a seat slide sleeve, and the seat rod 7 is slidably inserted into the seat slide sleeve.

[0050] like Fig.10 , 11As shown, the child stroller frame also includes a flexible connecting belt 8 for users to lift when the child stroller frame is in the folded state, and the flexible connecting belt 8 is partially exposed above the seat rod 7. The flexible connecting belt 8 is arranged above the seat rod 7, and the end of the flexible connecting belt 8 is connected to the pivotal portion between the front linkage rod 6 and the rear linkage rod 5; or the end of the flexible connecting belt 8 is connected to the rear end of the corresponding front linkage rod 6 or the lower end of the corresponding rear linkage rod 5. In this embodiment, by providing a flexible connecting belt, it is more convenient for users to lift the child stroller frame in the folded state. At the same time, the end of the flexible connecting belt is connected to the front linkage rod or the rear linkage rod. In the process of lifting by the user, the flexible connecting belt passes through the front linkage rod and the rear linkage rod so that the front foot rod and the push rod have a movement tendency to move towards each other, effectively avoiding the situation in which the rods rotate and collide and wear each other during the lifting and transportation process of the whole vehicle, thereby affecting its service life, and ensuring that the structure of the whole vehicle in the folded state is stable and reliable.

[0051] like Figure 1-5 As shown in , 8, 10, and 11, the two rear linkage rods 5 or the two front linkage rods 6 are connected by a connecting crossbar 9. In this embodiment, the synchronization between the two rear linkage rods can be ensured by connecting the crossbar, and the structural strength between the two rear linkage rods can be improved.

[0052] like Figure 1-8 As shown in Figures 10 and 11, in order to make the structure between the front foot rod, the rear foot rod and the push rod more compact after being folded, the front foot rod 1 includes a front foot straight section 11 and a front foot extension section 12 connected to the upper end of the front foot straight section 11 and extending and bending toward one side of the rear foot rod 2, the upper end of the rear foot rod 2 has a front foot connecting recess 20 for inserting the corresponding end of the front foot extension section 12, the upper end of the rear foot rod 2 also has a push rod connecting section 21 extending backwards and used to be pivotally connected to the lower end of the push rod 3; the pivot axis A is located between the front foot extension section 12 and the upper end of the rear foot rod 2, and the pivot axis B is located between the lower end of the push rod 3 and the push rod connecting section 21. In this embodiment, the front foot straight section 11 is rotatably connected to the upper end of the rear foot rod 2 through the front foot extension section 12, so that there is a sufficient rotation range between the upper end of the front foot rod 1 and the upper end of the rear foot rod 2, which can avoid the upper end of the front foot rod 1 from interfering with the upper end of the rear foot rod 2 during the folding process, ensuring that the front foot rod as a whole is closer to the rear foot rod; at the same time, the lower end of the push rod is rotatably connected to the upper end of the rear foot rod 2 through the push rod connecting section 21, which also ensures that there is a sufficient rotation range between the lower end of the push rod and the upper end of the rear foot rod 2, which can avoid the lower end of the push rod from interfering with the upper end of the rear foot rod 2 during the folding process, ensuring that the push rod as a whole is closer to the rear foot rod.

[0053] like Figure 7As shown, in order to improve the structural stability and reliability of the entire stroller in the unfolded state, the front foot connecting recess 20 has a blocking side wall 201 for abutting and blocking against the corresponding side wall of the front foot extension section 12 to prevent the front foot rod 2 from continuing to flip upward when the stroller frame is in the unfolded state.

[0054] In other embodiments, the rear foot rod 2 includes a rear foot straight section and a rear foot extension section connected to the upper end of the rear foot straight section and extending and bending toward one side of the front foot rod 1; the upper end of the front foot rod 1 has a rear foot connecting recess for inserting the corresponding end of the rear foot extension section; a push rod connecting section 21 extending backward and pivotally connected to the lower end of the push rod 3 is provided between the rear foot straight section and the rear foot extension section; the pivot axis A is located between the upper end of the front foot rod 1 and the rear foot extension section, and the pivot axis B is located between the lower end of the push rod 3 and the push rod connecting section 21.

[0055] like Fig. 9 , 12 As shown, in order to ensure reliable locking and convenient unlocking, the frame unlocking mechanism 33 is configured to be linked to the handlebar 4 to perform a corresponding unlocking action when the handlebar 4 is rotated and folded to a preset angle relative to the push rod 3, thereby linking the unlocking action of the frame locking mechanism 32. The frame locking mechanism 32 includes a frame locking hole 321 provided on the push rod sliding member 31 and a frame locking block 322 slidably provided on the push rod 3 and capable of being inserted into the frame locking hole 321. A locking block reset member 323 for driving the frame locking block 322 to elastically slide and reset is provided between the frame locking block 322 and the push rod 3; the frame locking block 322 is configured to be linked to the frame unlocking mechanism 33 to perform a corresponding unlocking action. The frame unlocking mechanism 33 includes a frame unlocking block 331 movably arranged between the upper end of the push rod 3 and the lower end of the handlebar 4 and can be linked to the handlebar 4 to move accordingly when the handlebar 4 is rotated and folded relative to the push rod 3. The frame unlocking block 331 is connected to the frame locking block 322 through a frame unlocking pull rope 332. When the handlebar flips forward relative to the push rod, the handlebar drives the frame unlocking block 331 to rotate accordingly, and the frame unlocking block 331 pulls the frame locking block 322 to slide horizontally relative to the push rod 3 through the frame unlocking pull rope 332, so that the locking end of the frame locking block 322 exits the frame locking hole 321, thereby releasing the locking state of the push rod sliding member 31 relative to the push rod 3, and the push rod sliding member 31 can slide along the length direction of the push rod 3.

[0056] like Fig. 9 , 12As shown, in order to facilitate the locking and unlocking of the handlebar, the handlebar locking mechanism 40 includes a handlebar locking groove 401 provided on the opposite sides of the upper end of the push rod 3 and the lower end of the handlebar 4, and a handlebar locking gear 402 slidably provided between the upper end of the push rod 3 and the lower end of the handlebar 4 and capable of being simultaneously inserted into the handlebar locking groove 401 of the upper end of the push rod 3 and the lower end of the handlebar 4; the handlebar locking mechanism 40 also includes a locking gear reset member for driving the handlebar locking gear 402 to elastically slide and reset; the handlebar unlocking mechanism 4 1 comprises a handlebar unlocking dial rotatably arranged between the lower end of the handlebar 4 and the handlebar locking gear 402 and used for pushing the handlebar locking gear 402 to perform a corresponding unlocking action, and the handlebar unlocking dial and the opposite side parts of the lower end of the handlebar 4 are both provided with unlocking inclined surfaces for cooperating with each other to drive the handlebar unlocking dial to slide axially when the handlebar unlocking dial rotates, and the handlebar unlocking mechanism 41 also comprises a handlebar unlocking button arranged at the upper end of the handlebar 4, and the handlebar unlocking button is connected to the handlebar unlocking dial through a handlebar unlocking pull rope. When folding, the user presses the handlebar unlocking button, which then drives the handlebar unlocking dial to rotate through the handlebar unlocking rope. At this time, the handlebar unlocking dial pushes the handlebar locking gear 402 to slide toward the upper end of the push rod 3 under the action of the unlocking inclined surface, until the handlebar locking gear 402 is disengaged from the handlebar locking groove 401 at the lower end of the handlebar 4 to release the locking state of the handlebar 4 relative to the push rod 3; then the handlebar 4 is operated to flip upward relative to the push rod 3 and fold toward the side of the push rod 3 until the handlebar 4 is in the folded state. At this time, the pressing force on the handlebar unlocking button is cancelled, and the handlebar locking gear 402 is re-engaged into the handlebar locking groove 401 at the lower end of the handlebar 4 under the action of the locking gear reset member to lock the handlebar 4 in the folded state. For the convenience of folding or unfolding, a torsion spring is provided between the lower end of the handlebar 4 and the upper end of the push rod 3. The torsion spring is configured to drive the handlebar to flip forward relative to the push rod to fold, or to drive the handlebar to flip backward relative to the push rod to unfold.

[0057] like Fig.12 As shown, in order to better lock the handlebar, the handlebar locking mechanism 40 includes a handlebar locking hole 403 eccentrically arranged on the corresponding side of the upper end of the push rod 3 or the lower end of the handlebar 4 and a handlebar locking pin 404 elastically arranged on the lower end of the handlebar 4 or the upper end of the push rod 3 and capable of being inserted into the handlebar locking hole 403. When the handlebar is rotated and folded relative to the push rod to a folded state, the handlebar locking pin 404 is inserted into the corresponding handlebar locking hole 403 to lock the handlebar relative to the push rod. At the same time, when the handlebar is rotated relative to the push rod to an unfolded state, the handlebar locking pin 404 is also inserted into the corresponding handlebar locking hole 403 to lock the handlebar relative to the push rod. Among them, the locking end of the handlebar locking pin 404 has an inclined surface, which is convenient for forcing the handlebar locking pin 404 to correspondingly unlock when the handlebar rotates.

Claims

1. A child stroller frame that is easy to fold, the child stroller frame can be switched between a folded state and an unfolded state, and is characterized in that include: rear foot rod (2); A front foot rod (1), wherein the upper end of the front foot rod (1) is pivotally connected to the upper end of the rear foot rod (2) via a pivot axis A; A push rod (3), the lower end of the push rod (3) is pivotally connected to the upper end of the rear foot rod (2) via a pivot axis B, and a push rod sliding member (31) is slidably provided on the push rod (3); A handlebar (4), wherein the lower end of the handlebar (4) is rotatably connected to the upper end of the push rod (3), a handlebar locking mechanism (40) is provided between the handlebar (4) and the push rod (3) for locking the handlebar (4) in an unfolded state and a folded state relative to the push rod (3), and a handlebar unlocking mechanism (41) is provided on the handlebar (4) for interlocking the unlocking action of the handlebar locking mechanism (40); A rear linkage rod (5), the upper end of which is rotatably connected to a push rod sliding member (31), and the middle portion of the rear linkage rod (5) is pivotally connected to the upper portion of the rear foot rod (2) via a pivot axis C; A front linkage rod (6), wherein the front end of the front linkage rod (6) is rotatably connected to the front foot rod (1), and the rear end of the front linkage rod (6) is rotatably connected to the lower end of the rear linkage rod (5); A frame locking mechanism (32), wherein the frame locking mechanism (32) is located between the push rod sliding member (31) and the push rod (3) and is used to lock the push rod sliding member (31) relative to the push rod (3); A frame unlocking mechanism (33) is located on the push rod (3) and is used to link the unlocking action of the frame locking mechanism (32) to release the locking state of the push rod sliding member (31) relative to the push rod (3).

2. The easily foldable child stroller frame according to claim 1, characterized in that Also includes: A seat slide (71), wherein the seat slide (71) is pivotally connected to the lower portion of the push rod (3) or the upper portion of the rear foot rod (2) via a pivot axis D, and when the child stroller frame is in an unfolded state, the pivot axis D is located above the pivot axis C; A seat rod (7), the rear end of which is rotatably connected to the upper part of the rear linkage rod (5), and the seat rod (7) is slidably connected to a seat sliding member (71).

3. The easily foldable child stroller frame according to claim 2, characterized in that The stroller also comprises a flexible connecting belt (8) for a user to pull when the stroller frame is in a folded state, and a portion of the flexible connecting belt (8) is exposed above the seat rod (7).

4. The easily foldable child stroller frame according to claim 3, characterized in that The flexible connecting belt (8) is wound around the seat rod (7), and the end of the flexible connecting belt (8) is connected to the pivotal portion between the front linkage rod (6) and the rear linkage rod (5); or the end of the flexible connecting belt (8) is connected to the rear end of the corresponding front linkage rod (6) or the lower end of the corresponding rear linkage rod (5).

5. The conveniently foldable child stroller frame according to claim 1, characterized in that The two rear linkage rods (5) or the two front linkage rods (6) are connected via a connecting cross rod (9).

6. The conveniently foldable child stroller frame according to claim 1, characterized in that The pivot axis B is configured to be offset from the pivot axis A.

7. The conveniently foldable child stroller frame according to claim 1, characterized in that The front foot rod (1) comprises a front foot straight section (11) and a front foot extension section (12) connected to the upper end of the front foot straight section (11) and extending and bending toward one side of the rear foot rod (2); the upper end of the rear foot rod (2) has a front foot connection recess (20) for inserting the corresponding end of the front foot extension section (12); the upper end of the rear foot rod (2) also has a push rod connection section (21) extending backwards and used for pivoting with the lower end of the push rod (3); the pivot axis A is located between the front foot extension section (12) and the upper end of the rear foot rod (2); the pivot axis B is located between the lower end of the push rod (3) and the push rod connection section (21); Alternatively, the rear foot rod (2) comprises a rear foot straight section and a rear foot extension section connected to the upper end of the rear foot straight section and extending and bending toward one side of the front foot rod (1); the upper end of the front foot rod (1) has a rear foot connecting recess for inserting the corresponding end of the rear foot extension section; between the rear foot straight section and the rear foot extension section there is a push rod connecting section (21) extending backwards and used for pivoting with the lower end of the push rod (3); the pivot axis A is located between the upper end of the front foot rod (1) and the rear foot extension section, and the pivot axis B is located between the lower end of the push rod (3) and the push rod connecting section (21).

8. A conveniently foldable child stroller frame according to any one of claims 1 to 7, characterized in that The frame unlocking mechanism (33) is configured to be linked to a corresponding unlocking action by the handlebar (4) when the handlebar (4) is rotated and folded relative to the push rod (3) to a preset angle, thereby linking the unlocking action of the frame locking mechanism (32).

9. A conveniently foldable child stroller frame according to any one of claims 1 to 7, characterized in that The handlebar locking mechanism (40) comprises a handlebar locking groove (401) provided on opposite sides of the upper end of the push rod (3) and the lower end of the handlebar (4), and a handlebar locking gear (402) slidably provided between the upper end of the push rod (3) and the lower end of the handlebar (4) and capable of being simultaneously engaged with the handlebar locking groove (401) of the upper end of the push rod (3) and the lower end of the handlebar (4); the handlebar locking mechanism (40) further comprises a locking gear reset member for driving the handlebar locking gear (402) to elastically slide and reset; The handlebar unlocking mechanism (41) comprises a handlebar unlocking dial rotatably arranged between the lower end of the handlebar (4) and the handlebar locking gear (402) and used to push the handlebar locking gear (402) to perform a corresponding unlocking action. The handlebar unlocking dial and the opposite side portions of the lower end of the handlebar (4) are both provided with unlocking inclined surfaces for cooperating with each other to drive the handlebar unlocking dial to slide axially when the handlebar unlocking dial rotates. The handlebar unlocking mechanism (41) also comprises a handlebar unlocking button arranged at the upper end of the handlebar (4), and the handlebar unlocking button is connected to the handlebar unlocking dial via a handlebar unlocking pull rope.

10. A conveniently foldable child stroller frame according to any one of claims 1 to 7, characterized in that The handlebar locking mechanism (40) comprises a handlebar locking hole (403) eccentrically arranged on the corresponding side of the upper end of the push rod (3) or the lower end of the handlebar (4), and a handlebar locking pin (404) which can be elastically arranged on the lower end of the handlebar (4) or the upper end of the push rod (3) and can be inserted into the handlebar locking hole (403).

Images