CN106985891B - a stroller for children - Google Patents

Abstract

The invention relates to a stroller for children. A children's stroller, the frame of which includes: a front wheel support, a lower rear wheel support, a sliding part, an upper rear wheel support, a push rod assembly, a seatpost, a connecting rod, a first return part, a second return part and a locking device . The upper rear wheel bracket is pivotally connected with the front wheel bracket, the upper rear wheel bracket is slidingly connected with the lower rear wheel bracket, the push rod assembly is slidingly connected with the front wheel bracket, the slider is slidingly connected with the front wheel bracket, and the seatpost is respectively connected with the slider and the Upper rear wheel bracket pivot connection. The connecting rod is pivotally connected with the seat post and the lower rear wheel support respectively. The first return part is used to provide a restoring force to drive the push rod assembly to slide upward; the second return part is used to provide a restoring force to drive the upper rear wheel bracket to slide upward. The locking device is used to lock the vehicle frame in the expanded state and the folded state. The invention can realize the automatic unfolding and semi-automatic folding of the children's stroller, making the unfolding and folding of the children's stroller simpler and more convenient.

Description

a stroller for children

technical field

The invention relates to a stroller for children.

Background technique

At present, most of the children's strollers and children's strollers used in the market are foldable structures, that is, unfolded for children to ride when in use, and folded when not in use for easy storage or transportation. However, although the existing strollers are of various structures and types, most of them can only be unfolded and folded manually in multiple steps. Complete the unfolding and collapsing operations.

Contents of the invention

The technical problem to be solved by the present invention is to provide a child stroller with simple and convenient unfolding and folding operations.

In order to solve the above-mentioned technical problems, a technical solution adopted by the present invention is: a children's stroller, which includes a frame with an unfolded state and a folded state, a front wheel arranged at the front under the frame, and a rear wheel arranged at the bottom of the frame. rear wheel. The frame includes:

a front wheel bracket, the lower part of which is connected to the front wheel;

a lower rear wheel support, the lower part of which is connected to the rear wheel;

The upper rear wheel bracket, the upper part of the upper rear wheel bracket is pivotally connected with the front wheel bracket, the lower part of the upper rear wheel bracket is slidingly connected with the lower rear wheel bracket, and the upper rear wheel bracket can be moved along the lower rear wheel bracket Swipe up and down in the direction of extension;

a push rod assembly, the push rod assembly is slidably connected to the front wheel bracket, and the push rod assembly can slide up and down along the extension direction of the front wheel bracket;

a sliding part, the sliding part is slidably connected with the front wheel bracket, and the sliding part can slide up and down along the extension direction of the front wheel bracket;

a seat post pivotally connected to the slider at the front and pivotally connected at the rear to the upper rear wheel bracket;

a connecting rod, the upper part of which is pivotally connected to the seat post, and the lower part of the connecting rod is pivotally connected to the lower rear wheel bracket;

a first return piece, the first return piece is respectively connected to the front wheel bracket and the push rod assembly, and the first return piece is used to provide a restoring force to drive the push rod assembly to slide upward along the front wheel bracket;

The second reply piece, the second reply piece is respectively connected with the upper rear wheel bracket and the lower rear wheel bracket, and the second reply piece is used to provide a restoring force to drive the upper rear wheel bracket to slide upward along the lower rear wheel bracket;

a locking device, the locking device is used to lock the vehicle frame in the unfolded state and the folded state,

When the vehicle frame is in the unfolded state, the first return member is in the unfolded state, and the second return member is in the contracted state; when the vehicle frame is in the folded state, the first return member is in the contracted state, and the second return member is in the contracted state. The two return parts are in the unfolded state; when the vehicle frame in the unfolded state is unlocked, the second return part can provide a restoring force to drive the upper rear wheel bracket upward, and the seat post, connecting rod and sliding member drive the upper rear wheel support and the lower rear wheel bracket move closer to the front wheel bracket; when the vehicle frame is unfolded, the push rod assembly and the slider are locked to each other, and the first return member can provide a restoring force to drive the push rod assembly upward, and the push rod assembly The rod assembly can drive the sliding part to move upward synchronously, and the sliding part, the seat post and the connecting rod drive the upper rear wheel support and the lower rear wheel support to expand backward, and the upper rear wheel support slides downward to contract.

Specifically, when the vehicle frame is in the unfolded state, the front wheel bracket and the lower rear wheel bracket are relatively deployed one after the other, the push rod assembly slides upwards and stretches relative to the front wheel bracket, and the locking device pushes the push rod The rod assembly and the slider are locked on the front wheel bracket, the upper rear wheel bracket presses the second return member against the lower rear wheel bracket so that the second return member is in a compressed state, and the seatpost is deployed in the front and rear direction along the front wheel Between the bracket and the upper rear wheel bracket, the connecting rod is deployed between the seat post and the lower rear wheel bracket; when the vehicle frame is in a folded state, the front wheel bracket and the lower rear wheel bracket are relatively close together, and the push rod Sliding downwards relative to the front wheel bracket contraction, the locking device locks the push rod assembly and the slider to each other and simultaneously locks the push rod assembly and the front wheel bracket to each other, and the push rod assembly locks the first The return part is pressed against the front wheel bracket so that the first return part is in a contracted state, the upper rear wheel support slides upwards and stretches relative to the lower rear wheel support, and the seatpost and connecting rod are folded on the front wheel support and the upper rear wheel support. Between the bracket and the lower rear wheel bracket; when the vehicle frame in the unfolded state is unlocked, two of the front wheel bracket, the push rod assembly and the slider are untied, and the push rod assembly and the slider can be respectively slide on the front wheel bracket; when the vehicle frame in the folded state is unlocked, the front wheel bracket is mutually untied from the push rod assembly and the sliding part respectively, and the push rod assembly and the sliding part remain locked to each other.

Preferably, the push rod assembly includes an upper push rod and a lower push rod, the lower push rod is slidably connected with the front wheel bracket, and the lower push rod can slide up and down along the extension direction of the front wheel bracket; the upper push rod Slidingly connected with the lower push rod, the upper push rod can slide up and down along the extending direction of the lower push rod.

Specifically, the lower push rod is a pipe, the upper push rod is inserted into the lower push rod and can slide up and down in the upper push rod, and when the vehicle frame is in the unfolded state, the upper push rod slides upward The lower push rod; when the vehicle frame is in the folded state, the upper push rod slides downward and shrinks toward the lower push rod.

Specifically, the vehicle frame also includes a sliding sleeve assembly, and the sliding sleeve assembly includes an upper sliding sleeve fixedly arranged on the front wheel bracket and a lower sliding sleeve fixedly arranged on the lower push rod, and the lower push rod is sleeved on the upper In the sliding sleeve, the front wheel bracket is sleeved in the lower sleeve, and the lower push rod can slide up and down relative to the front wheel bracket under the guidance of the upper sliding sleeve and the lower sleeve.

Specifically, the locking device includes a locking part arranged at the lower part of the lower push rod. When the vehicle frame is in the unfolded state, the locking part can lock the front wheel bracket, the lower push rod and the sliding part to each other, and push The downward sliding of the upper push rod can trigger the unlocking of the locking part and then untie the front wheel bracket, the lower push rod and the sliding part two by two; when the frame is in the folded state, the locking part can release the lower pushing rod and the sliding part lock each other.

Specifically, the locking device includes an end sleeve arranged on the upper part of the lower push rod and a folding hook correspondingly arranged on the upper part of the front wheel bracket. When the frame is in a folded state, the lower push rod slides downward until the end sleeve reaches At the folding hook, the folding hook can hang on the end cover and then lock the lower push rod and the front wheel bracket to each other.

Preferably, the sliding member is a sliding sleeve structure, and the sliding member is sleeved on the front wheel bracket and located under the upper sliding sleeve and the lower sliding sleeve.

Preferably, the first return member and the second return member are air compression springs or compression springs.

Specifically, both the front wheel support and the lower rear wheel support are pipe fittings, the first return member is installed inside the front wheel support, the upper part of the first return member is connected with the push rod assembly, and the lower part is against the front wheel support The inner lower part of the inner part; the second return part is installed in the lower rear wheel bracket, the upper part of the second return part is connected with the lower part of the upper rear wheel support, and the lower part of the second return part is connected with the inner part of the lower rear wheel support. The lower part is connected against each other.

The orientation words such as front, rear, left, right, up, and down mentioned above are defined in the normal use orientation of the stroller.

The scope of the present invention is not limited to technical solutions formed by a specific combination of the above technical features, but also covers other technical solutions formed by any combination of the above technical features or equivalent features. For example, technical solutions formed by replacing the above-mentioned features with technical features with similar functions disclosed in this application, etc.

Due to the application of the above-mentioned technical solutions, the present invention has the following advantages compared with the prior art: the restoring force for frame expansion is provided by the first restoring member, the restoring force for folding the bicycle frame is provided by the second restoring member, , The connecting rod is linked with the front wheel bracket, the upper rear wheel bracket and the lower rear wheel bracket, which can realize the automatic unfolding and semi-automatic folding of the stroller, making the unfolding and folding of the stroller easier and more convenient.

Description of drawings

Fig. 1 is the front view when the children's stroller of the present invention is in the unfolded state;

Fig. 2 is a left view of the children's stroller in the unfolded state of the present invention;

Fig. 3 is an exploded view of the children's stroller of the present invention;

Fig. 4 is a front view of the stroller when the upper push rod is retracted to trigger the unlocking part to be unlocked;

Fig. 5 is a front view of the children's stroller in a half-folded state according to the present invention;

Fig. 6 is a front view of the children's stroller in a folded state according to the present invention;

Among them: 1. Front wheel bracket; 2. Lower rear wheel bracket; 3. Upper rear wheel bracket; 4. Push rod assembly; 9. Second response piece; 10. Sliding sleeve assembly; 11. Upper sliding sleeve; 12. Lower sliding sleeve; 13. Locking piece; 14. End sleeve; 15. Folding hook; 41. Upper push rod; 42. Lower push rod 100, vehicle frame; 101, front wheel; 102, rear wheel; 201, first axle; 202, second axle; 203, third axle;

Detailed ways

As shown in Figures 1 to 6, a children's stroller according to the present invention includes a vehicle frame 100 in an unfolded state and a folded state, a front wheel 101 arranged at the front of the vehicle frame 100, a front wheel 101 arranged on the vehicle frame 100 The rear wheel 102 at the lower rear.

The vehicle frame 100 includes:

Front wheel support 1, the bottom of the front wheel support 1 is connected with the front wheel 101;

The lower rear wheel support 2, the bottom of the lower rear wheel support 2 is connected with the rear wheel 102, and the lower rear wheel support 2 is a pipe fitting;

Upper rear wheel support 3, the upper part of the upper rear wheel support 3 is pivotally connected with the front wheel support 1 through the first shaft 201, and the lower part of the upper rear wheel support 3 is inserted into the lower rear wheel support 2 to connect with the lower rear wheel support 2 sliding connection, the upper rear wheel bracket 3 can slide up and down along the extending direction of the lower rear wheel bracket 2;

The push rod assembly 4, the push rod assembly 4 includes an upper push rod 41 and a lower push rod 42, the lower push rod 42 is slidably connected with the front wheel bracket 1, and the lower push rod 42 can extend along the front wheel bracket 1 direction; the upper push rod 41 is slidingly connected with the lower push rod 42, and the upper push rod 41 can slide up and down along the extending direction of the lower push rod 42;

Slider 5, said slider 5 is slidably connected with front wheel bracket 1, said slider 5 can slide up and down along the extension direction of front wheel bracket 1;

Seat post 6, the front part of the seat post 6 is pivotally connected with the slider 5 via the second shaft 202, and the rear part of the seat post 6 is pivotally connected with the upper rear wheel bracket 3 via the third shaft 203 connect;

A connecting rod 7, the upper part of the connecting rod 7 is pivotally connected with the seat post 6 through the fourth shaft 204, and the lower part of the connecting rod 7 is pivotally connected with the lower rear wheel bracket 2 through the fifth shaft 205;

The first return part 8, the first return part 8 is respectively connected with the front wheel bracket 1 and the push rod assembly 4, and the first return part 8 is used to provide a restoring force to drive the push rod assembly 4 along the front wheel bracket 1 slide up;

The second return part 9, the second return part 9 is respectively connected with the upper rear wheel support 3 and the lower rear wheel support 2, and the second return part 9 is used to provide a restoring force to drive the upper rear wheel support 3 along the lower rear wheel Bracket 2 slides up;

A locking device, the locking device is used to lock the vehicle frame 100 in the unfolded state and the folded state.

The lower push rod 42 is a pipe, and the upper push rod 41 is inserted into the lower push rod 42 and can slide up and down in the upper push rod 41 . The vehicle frame 100 also includes a sliding sleeve assembly 10 , and the sliding sleeve assembly 10 includes an upper sliding sleeve 11 fixedly arranged on the front wheel bracket 1 and a lower sliding sleeve 12 fixedly arranged on the lower push rod 42 . The lower push rod 42 is sleeved in the upper sliding sleeve 11, the front wheel bracket 1 is sleeved in the lower sleeve 12, and the lower push rod 42 can be oppositely guided by the upper sliding sleeve 11 and the lower sleeve 12. The front wheel support 1 slides up and down.

The locking device includes a locking piece 13 arranged at the lower part of the lower push rod 42 , an end sleeve 14 arranged at the upper part of the lower push rod 42 and a folding hook 15 correspondingly arranged at the upper part of the front wheel bracket 1 . The locking member 13 can lock the front wheel bracket 1 , the lower push rod 42 and the sliding member 5 to each other.

The first return member 8 and the second return member 9 are air compression springs or compression springs. In this embodiment, the first return member 8 is an air compression spring, and the second return member 9 is a compression spring. The first return member 8 is installed inside the front wheel bracket 1 , the upper part of the first return member 8 is connected to the lower push rod 42 , and the lower part is against the inner lower part of the front wheel bracket 1 . The second return member 9 is installed in the lower rear wheel support 2, the upper part of the second return member 9 is connected to the lower part of the upper rear wheel support 3, and the lower part of the second return member 9 is connected to the lower rear wheel support 2. The inner and lower parts are connected against each other.

The sliding member 5 is a sliding sleeve structure, and the sliding member 5 is sleeved on the front wheel bracket 1 and located below the upper sliding sleeve 11 and the lower sliding sleeve 12 .

As shown in FIG. 1 , when the vehicle frame 100 is in an unfolded state, the front wheel bracket 1 and the lower rear wheel bracket 2 are relatively deployed in tandem. The lower push rod 42 slides upwards and stretches relative to the front wheel bracket 1 , and the upper push rod 41 also slides upwards and stretches relative to the lower push rod 42 . The locking member 13 locks the lower push rod 42 and the sliding member 5 on the front wheel bracket 1 at the same time. The first return member 8 is in an expanded state, and the upper rear wheel bracket 3 presses the second return member 9 against the lower rear wheel support 2 so that the second return member 9 is in a compressed state. The seat post 6 is deployed between the front wheel bracket 1 and the upper rear wheel bracket 3 along the front-rear direction, and the connecting rod 7 is deployed between the seat post 6 and the lower rear wheel bracket 2 .

As shown in FIG. 6 , when the vehicle frame 100 is in a folded state, the front wheel bracket 1 and the lower rear wheel bracket 2 are relatively close together. The upper push rod 41 slides downward and shrinks toward the lower push rod 42, and the lower push rod 42 slides downward until the end sleeve 14 reaches the folding hook 15, and the folding hook 15 can catch the end sleeve 14 and then The lower push rod 42 and the front wheel bracket 1 are mutually locked. At the same time, the locking member 13 locks the lower push rod 42 and the sliding member 5 mutually. The lower push rod 42 presses the first return member 8 against the front wheel bracket 1 so that the first return member 8 is in a retracted state, and the upper rear wheel support 3 slides upward relative to the lower rear wheel support 2 to stretch out. The second return member 9 is in an open state, and the seatpost 6 and the connecting rod 7 are gathered between the front wheel bracket 1 , the upper rear wheel bracket 3 and the lower rear wheel bracket 4 .

When the vehicle frame 100 in the unfolded state is unlocked, push the upper push rod 41 to slide downward to trigger the unlocking of the locking member 13 and then untie the front wheel bracket 1 , the lower push rod 42 and the sliding member 5 in pairs. The second return member 9 can provide a restoring force to drive the upper rear wheel bracket 3 upward, and the slider 5 is driven by the crank slider mechanism formed by the seatpost 6, the connecting rod 7 and the upper rear wheel bracket 3 along the front wheel bracket. 1 automatically slides down. The seat post 6, the connecting rod 7 and the sliding member 5 drive the upper rear wheel support 3 and the lower rear wheel support 2 to move closer to the front wheel support 1. At this time, the vehicle frame is partially automatically folded, and the upper push rod 41 is pushed downwards to drive the lower push rod 42 to slide downward. At the position, the locking piece 13 locks the lower push rod 42 and the slider 5 to each other, and the end sleeve 14 on the lower push rod 42 reaches the folding hook 15, and the lower push rod 42 is connected to the front wheel bracket by hooking the end sleeve 14 through the folding hook 15. 1 are locked to each other, so that the folding of the vehicle frame 100 is completed. It can be seen that the present invention can realize the semi-automatic folding of the stroller.

When the vehicle frame 100 in the folded state is unlocked, the upper push rod 41 is pulled out upward so that the upper push rod 41 extends out of the lower push rod 42, the folding hook 15 is separated from the end cover 14, and the first return member 8 can provide The restoring force drives the lower push rod 42 upward. At this time, the lower push rod 42 and the slider 5 are still locked to each other. The lower push rod 42 can drive the slider 5 to move upward synchronously. The slider 5 and the seatpost 6 The slider crank mechanism formed with the connecting rod 7 drives the upper rear wheel bracket 3 and the lower rear wheel bracket 2 to expand backward, the upper rear wheel bracket 3 slides downward and contracts, and the second return member 9 shrinks under pressure. It can be seen that, except that the upper push rod 41 is pulled out manually, this practicality can realize the automatic deployment of the whole child stroller frame.

As mentioned above, we have fully described according to the purpose of the present invention, but the present invention is not limited to the above-mentioned embodiments and implementation methods. Practitioners in the relevant technical fields may make various changes and implementations within the scope permitted by the technical ideas of the present invention.

Claims (10)

1. A child stroller, comprising a vehicle frame (100) in an unfolded state and a folded state, a front wheel (101) arranged at the front portion below the vehicle frame (100), a rear wheel arranged at the bottom of the vehicle frame (100) Rear wheel (102), is characterized in that, described vehicle frame (100) comprises: A front wheel support (1), the lower part of the front wheel support (1) is connected to the front wheel (101); The lower rear wheel support (2), the bottom of the lower rear wheel support (2) is connected with the rear wheel (102); The upper rear wheel support (3), the upper part of the upper rear wheel support (3) is pivotally connected with the front wheel support (1), and the lower part of the upper rear wheel support (3) slides with the lower rear wheel support (2) connected, the upper rear wheel bracket (3) can slide up and down along the extending direction of the lower rear wheel bracket (2); A push rod assembly (4), the push rod assembly (4) is slidably connected to the front wheel bracket (1), and the push rod assembly (4) can slide up and down along the extension direction of the front wheel bracket (1); A sliding part (5), the sliding part (5) is slidingly connected with the front wheel bracket (1), and the sliding part (5) can slide up and down along the extension direction of the front wheel bracket (1); Seat post (6), the front part of the seat post (6) is pivotally connected with the slider (5), and the rear part of the seat post (6) is pivotally connected with the upper rear wheel support (3) connect; a connecting rod (7), the upper part of the connecting rod (7) is pivotally connected to the seatpost (6), and the lower part of the connecting rod (7) is pivotally connected to the lower rear wheel bracket (2); The first return part (8), the first return part (8) is respectively connected with the front wheel bracket (1) and the push rod assembly (4), and the first return part (8) is used to provide the return force to drive the The push rod assembly (4) slides upwards along the front wheel bracket (1); The second return part (9), the second return part (9) is respectively connected with the upper rear wheel support (3) and the lower rear wheel support (2), and the second return part (9) is used to provide a return force Drive the upper rear wheel support (3) to slide upward along the lower rear wheel support (2); a locking device, the locking device is used to lock the vehicle frame (100) in the expanded state and the folded state, When the vehicle frame (100) is in the expanded state, the first return member (8) is in the unfolded state, and the second return member (9) is in the contracted state; when the vehicle frame (100) is in the folded state, the The first return member (8) is in a contracted state, and the second return member (9) is in an expanded state; when the vehicle frame (100) in the unfolded state is unlocked, the second return member (9) can provide The restoring force drives the upper rear wheel support (3) upward, and the seatpost (6), connecting rod (7) and sliding member (5) drive the upper rear wheel support (3) and the lower rear wheel support (2) to the described The front wheel bracket (1) draws closer; when the vehicle frame is unfolded, the push rod assembly (4) and the sliding member (5) are mutually locked, and the first return member (8) can provide a restoring force to drive the push rod assembly (4) ) upward, the push rod assembly (4) can drive the slider (5) upward synchronously, and the slider (5), seat post (6) and connecting rod (7) drive the upper rear wheel bracket (3) and the lower The rear wheel support (2) expands backward, and the described upper rear wheel support (3) slides down and shrinks. 2. A stroller for children according to claim 1, characterized in that, when the vehicle frame (100) is in the unfolded state, the front wheel bracket (1) and the lower rear wheel bracket (2) are one behind the other Relatively deployed, the push rod assembly (4) slides upwards and stretches relative to the front wheel bracket (1), and the locking device locks the push rod assembly (4) and the slider (5) on the front wheel bracket (1) Above, the upper rear wheel bracket (3) presses the second return member (9) against the lower rear wheel support (2) so that the second return member (9) is in a compressed state, and the seatpost (6) The direction is deployed between the front wheel bracket (1) and the upper rear wheel bracket (3), and the connecting rod (7) is deployed between the seatpost (6) and the lower rear wheel bracket (2); when the vehicle frame (100) When in the folded state, the front wheel bracket (1) is relatively close to the lower rear wheel bracket (2), the push rod assembly (4) slides down and shrinks relative to the front wheel bracket (1), and the locking device will The push rod assembly (4) and the slider (5) lock each other and at the same time lock the push rod assembly (4) and the front wheel bracket (1) with each other, and the push rod assembly (4) locks the first The return member (8) is pressed against the front wheel support (1) so that the first return member (8) is in a contracted state, and the upper rear wheel support (3) slides upwards relative to the lower rear wheel support (2), so that The seat post (6) and the connecting rod (7) are folded between the front wheel bracket (1), the upper rear wheel bracket (3) and the lower rear wheel bracket (2); when the vehicle frame (100) in the unfolded state is unlocked , the front wheel bracket (1), the push rod assembly (4) and the slider (5) are untied two by two, and the push rod assembly (4) and the slider (5) can be respectively mounted on the front wheel slide on the bracket (1); when the vehicle frame (100) in the folded state is unlocked, the front wheel bracket (1) and the push rod assembly (4) and the slider (5) are respectively untied from each other, and the push rod Assembly (4) and slider (5) remain interlocked. 3. A kind of stroller for children according to claim 1, characterized in that, the push rod assembly (4) comprises an upper push rod (41) and a lower push rod (42), and the lower push rod (42) It is slidably connected with the front wheel support (1), and the lower push rod (42) can slide up and down along the extension direction of the front wheel support (1); the upper push rod (41) is slidably connected with the lower push rod (42), The upper push rod (41) can slide up and down along the extending direction of the lower push rod (42). 4. The stroller for children according to claim 3, characterized in that, the lower push rod (42) is a pipe, and the upper push rod (41) is inserted into the lower push rod (42) and can be placed on the upper push rod (42). Slide up and down in the push rod (41), when the vehicle frame (100) is in the unfolded state, the upper push rod (41) slides upwards and stretches out the lower push rod (42); when the vehicle frame (100) is in the When in the folded state, the upper push rod (41) slides downward and shrinks toward the lower push rod (42). 5. A kind of stroller for children according to claim 3, characterized in that, the vehicle frame (100) further comprises a sliding sleeve assembly (10), and the sliding sleeve assembly (10) includes a (1) The upper sliding sleeve (11) and the lower sliding sleeve (12) fixedly arranged on the lower push rod (42), the lower push rod (42) is sleeved in the upper sliding sleeve (11), the front The wheel bracket (1) is sleeved in the lower sleeve (12), and the lower push rod (42) can slide up and down relative to the front wheel bracket (1) under the guidance of the upper sliding sleeve (11) and the lower sleeve (12). . 6. A children's stroller according to claim 3, characterized in that, the locking device comprises a locking piece (13) arranged at the lower part of the lower push rod (42), when the frame (100) is unfolded state, the lock (13) can lock the front wheel bracket (1), the lower push rod (42) and the slider (5) to each other, and push the upper push rod (41) to slide down to trigger the lock (13) Unlock and then untie the front wheel bracket (1), the lower push rod (42) and the sliding part (5) three by two; when the vehicle frame (100) was in the folded state, the locking part (13) It is possible to lock the lower push rod (42) and the slider (5) to each other. 7. A children's stroller according to claim 3, characterized in that the locking device comprises an end cover (14) arranged on the upper part of the lower push rod (42) and an end sleeve (14) correspondingly arranged on the upper part of the front wheel bracket (1). Folding hook (15), when the vehicle frame (100) is in the folded state, the lower push rod (42) slides down until the end sleeve (14) reaches the folding hook (15), and the folding hook (15 ) can hang the end cover (14) and then the lower push rod (42) and the front wheel bracket (1) are locked to each other. 8. A children's stroller according to claim 5, characterized in that, the sliding member (5) is a sliding sleeve structure, and the sliding member (5) is sleeved on the front wheel bracket (1) and is located at Below the upper sliding sleeve (11) and the lower sliding sleeve (12). 9. A stroller for children according to claim 1, characterized in that, the first return member (8) and the second return member (9) are compression springs. 10. A kind of stroller for children according to claim 1, characterized in that, both the front wheel bracket (1) and the lower rear wheel bracket (2) are pipe fittings, and the first return member (8) is installed on Inside the front wheel bracket (1), the upper part of the first return part (8) is connected with the push rod assembly (4), and the lower part is against the inner lower part of the front wheel support (1); the second return part (9) Installed in the lower rear wheel bracket (2), the upper part of the second return part (9) is connected to the bottom of the upper rear wheel bracket (3), and the lower part of the second return part (9) is connected to the lower rear wheel bracket. (2) The inner lower part offsets and connects.

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