CN111391911B

CN111391911B - Baby carriage with seat reversing mechanism

Info

Publication number: CN111391911B
Application number: CN201910001124.4A
Authority: CN
Inventors: 李玮烨
Original assignee: Guangdong Roadmate Group Co Ltd
Current assignee: Guangdong Roadmate Group Co Ltd
Priority date: 2019-01-02
Filing date: 2019-01-02
Publication date: 2021-10-01
Anticipated expiration: 2039-01-02
Also published as: CN111391911A

Abstract

The present invention provides a stroller having a seat reversing mechanism, comprising: an upper frame provided with a handle, wherein the handle is provided with a pushing position for pushing the baby carriage; the upper part of the lower frame is connected with the lower part of the upper framework, and the lower part of the lower frame is provided with a front wheel set and a rear wheel set; a seat arranged above the lower frame; the seat reversing mechanism is arranged between the upper framework and the lower framework and is used as a pivot for the upper framework to rotate relative to the lower framework, so that the seat is driven to rotate and is adjusted to be positioned forwards or backwards; the upper frame also comprises a guide piece connected with the seat reversing mechanism, and the handle can synchronously radially displace and rotate from an initial pushing position and return to the initial pushing position through the guide of the guide piece so as to drive the seat to horizontally rotate from a forward position to a backward position. Compared with the existing similar products, the reversing mechanism has the advantages of simple structure, simple reversing process and convenient use.

Description

Baby carriage with seat reversing mechanism

Technical Field

The invention relates to the technical field of baby carriages, in particular to a baby carriage with a reversing structure convenient for changing the orientation of a seat.

Background

A stroller generally comprises a handlebar, a frame assembly having a front wheel assembly and a rear wheel assembly, and a seat. In order to facilitate use or for comforting a child, the need of reversing the seat is usually needed, so that the infant sits facing forward or facing backward, in order to change the sitting direction, the inclined direction of the handle is generally changed, and a stroller user can move to another direction to operate when the handle is changed to another party, or the seat is dismounted and reversed, so that the child must be lifted up first to reverse the seat, and the use is inconvenient.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention aims to provide the baby carriage with the reversing structure which is convenient for reversing the seat.

In order to achieve the purpose, the invention adopts the technical scheme that: a stroller having a seat reversing mechanism, comprising: an upper frame provided with a handle, wherein the handle is provided with a pushing position for pushing the baby carriage;

the upper part of the lower frame is connected with the lower part of the upper framework, and the lower part of the lower frame is provided with a front wheel set and a rear wheel set;

a seat arranged above the lower frame;

the seat reversing mechanism is arranged between the upper framework and the lower framework and is used as a pivot for the upper framework to rotate relative to the lower framework, so that the seat is driven to rotate and is adjusted to be positioned forwards or backwards;

the upper frame also comprises a guide piece connected with the seat reversing mechanism, and the handle can synchronously radially displace and rotate from an initial pushing position and return to the initial pushing position through the guide of the guide piece so as to drive the seat to horizontally rotate from a forward position to a backward position. The initial pushing position refers to that when the handle is at the position, the baby carriage can be pushed to move forwards or backwards; the forward seat position is when the infant is seated facing the stroller in the direction of travel, whereas the rearward seat position is when the infant is facing the stroller.

Preferably, the seat reversing mechanism at least comprises a fixed seat and a rotating seat, and the fixed seat is arranged at the upper part of the lower frame and is positioned above the front wheel set and the rear wheel set; the rotating seat is arranged at the lower part of the upper framework and is horizontally and rotatably connected with the fixed seat; the handle is rotationally connected with the rotating seat, namely, the handle can move along the radial direction of the rotating seat relative to the rotating seat.

Preferably, the rotating seat has a radial gap therein, the fixed seat has a rotating space therein, the radial gap communicates with the rotating space and is penetrated by the guide member, and the guide member is capable of radially moving in the radial gap and rotating in the rotating space.

Preferably, a guide part movably connected with the guide part is arranged in the rotating space of the fixed seat.

Preferably, one end of the guide part is coupled with the fixed seat by a shaft, and the other end of the guide part is a free end; the free end of the guide part is rotatably connected with the lower end part of the guide piece positioned in the rotating space.

Preferably, a connecting member is fixedly arranged on the fixed seat, and a free end of the connecting member extends to be in shaft connection with the guide part.

Preferably, the guide portion comprises a bend.

The guiding piece is a guiding rod and is fixedly arranged at the center below the upper framework and positioned on an extension line of the longitudinal center line of the handle to the outside.

The seat reversing mechanism further comprises a rotating seat mounting part capable of defining a hollow area, the rotating seat mounting part is fixedly arranged at the upper end or the upper part of the fixed seat and is in rotating connection with the rotating seat mounting part, the rotating seat can horizontally rotate relative to the fixed seat, and the radial gap, the hollow area of the rotating seat mounting part and the rotating space are communicated with each other and are used for the guide part to penetrate through.

In order to increase the hand feeling during reversing, a first gear is fixedly arranged at the lower end part of the guide part, a second gear is fixedly arranged at the position, which is connected with the guide part through a shaft, on the fixed seat, and a transition gear meshed with the first gear and the second gear is arranged between the first gear and the second gear; the transition gear is connected to the middle part of the guide part in a gear way.

Or, the fixed seat is provided with a rotating cavity wall which defines a rotating space, the guide part is an annular guide rail which is concavely arranged in the rotating cavity wall, and the lower end of the guide part moves in the annular guide rail.

Further, an anti-idle-rotation part is arranged on the guide part, when the handle is radially displaced relative to the rotating seat and is close to the vertical position, the guide part is in the vertical position, and the anti-idle-rotation part is contacted with the wall of the rotating cavity.

The lower part of the upper framework is also provided with a lower transverse pipe, and the guide piece is fixedly arranged on the lower transverse pipe; the rotary seat comprises a joint upper seat and a joint lower seat connected with the joint upper seat; the rotating seat is sleeved on the lower transverse pipe and can rotate relative to the lower transverse pipe; the joint lower seat comprises a first part and a second part, and a radial gap for the guide piece to penetrate is formed between the first part and the second part.

The upper frame and the lower frame are connected together through the rotating seat connected with the upper frame and the fixed seat connected with the lower frame, the rotating seat can rotate relative to the fixed seat, and the guide piece arranged at the lower part of the upper frame penetrates through a radial gap in the rotating seat and a rotating space in the fixed seat, so that after connection, the upper frame and the lower frame form a whole, and the seat reversing mechanism at least consisting of the rotating seat and the fixed seat forms a universal connecting mechanism, so that the rotating seat can rotate in a horizontal plane by taking the fixed seat as an axis, and meanwhile, the handle can radially displace relative to the rotating seat along the rotating seat, thereby realizing the reversing operation of the seat; furthermore, the lower end part of the guide part is coupled with the guide part in the fixed seat in a shaft way, namely the guide part can rotate relative to the guide part, wherein the specific way is that a metal sheet as a connecting piece is fixedly arranged on the fixed seat to form a whole with the fixed seat, the free end of the connecting piece is hinged with the guide part, and the guide part is slightly shorter than the connecting piece; the free end of the guide part is connected with the lower end of the guide part by a shaft, the guide part can adopt a bent iron sheet, the upper end of the guide part is fixedly connected with the lower transverse pipe, in an initial state, namely, the handle is in an initial pushing position, the angle formed by the guide part and the connecting piece is 180 degrees, the backrest part and the handle of the seat are positioned on the same side, and the seat face faces forwards; the handle cannot be directly pushed radially to change the direction due to the interference of the guide piece and the guide part; when the reversing operation is carried out, the handle is pushed forwards from the initial pushing position to drive the whole upper framework to rotate, the rotating seat is driven to rotate clockwise or anticlockwise relative to the fixed seat in the horizontal plane, at the same time, the seat rotates along with the handle, the guide part rotates along with the lower end of the guide part by taking a hinge shaft between the guide part and the connecting piece as an axis, the guiding member is affected by the limit of the radial clearance of the rotating base, and can move radially while rotating, namely, the handle drives the seat to horizontally rotate and simultaneously radially displace relative to the seat, when the guide part continues to rotate and is overlapped with the connecting piece, the handle is in a roughly upright position, the handle is continuously pulled backwards until the handle returns to the original position, namely, the handle is at the initial pushing position, the backrest part is opposite to the handle, the seat face faces backwards, the sitting direction of the infant is changed, and the reversing process is completed.

The beneficial technical effects are as follows: the handle is hinged with the backrest part of the seat, the handle can rotate 360 degrees in a horizontal plane relative to a fixed seat arranged on a lower frame, in an initial state, namely the handle is in an initial pushing position, the backrest part on the seat and the handle are positioned on the same side, at the moment, an infant sits forward, when the direction needs to be changed, the handle is rotated along with the seat, the handle is enabled to horizontally rotate relative to the fixed seat and also radially displace relative to the rotating seat, the handle is continuously rotated relative to the fixed seat to return to the original position, namely to return to the initial pushing position, the seat rotates along with the handle, at the moment, the orientation of the seat is different from the orientation in the initial state, the infant sits backwards, and the direction changing operation of the seat is completed.

Drawings

FIG. 1 is an exploded view of a first embodiment of the present invention;

FIG. 2 is a perspective view of the first embodiment of the present invention in an initial state;

FIG. 3 is a first state diagram of the commutation process of the first embodiment of the present invention;

FIG. 4 is a schematic view of the handle in an upright position during a reversing operation of the first embodiment of the present invention;

FIG. 5 is a second state diagram of the commutation process of the first embodiment of the present invention;

FIG. 6 is a schematic diagram of the first embodiment of the present invention to accomplish the commutation process;

FIG. 7 is a schematic partial cross-sectional view of FIG. 2;

FIG. 8 is a fragmentary cross-sectional view of a first embodiment of the reversing procedure of the present invention in one state;

FIG. 9 is a fragmentary cross-sectional view of a first embodiment of the reversing procedure of the present invention in one state;

FIG. 10 is a schematic view, partly in cross-section, of a first embodiment of the invention in an upright position during a reversing procedure;

FIG. 11 is an enlarged view of a portion of FIG. 1;

FIG. 12 is a perspective view of an initial state of the second embodiment of the present invention;

FIG. 13 is a top plan view of a second embodiment of the present invention in an initial state;

FIG. 14 is a view A-A of FIG. 13;

FIG. 15 is an enlarged view of a portion of FIG. 14;

FIG. 16 is a partial schematic view of a third embodiment of the present invention;

fig. 17 is a partially enlarged view of fig. 16.

Detailed Description

In order that those skilled in the art will better understand the technical solution of the present invention, the following detailed description of the present invention is provided in conjunction with the accompanying drawings and embodiments.

As shown in fig. 1 to 11, a stroller having a seat reversing mechanism according to a first embodiment of the present invention includes: an upper frame 100 provided with a handle having a pushing position for pushing the stroller;

a lower frame 200, the upper part of which is connected with the lower part of the upper framework, and the lower part of which is provided with a front wheel set 202 and a rear wheel set 203;

a seat 300 provided above the lower frame;

the seat reversing mechanism 400 is arranged between the upper frame 100 and the lower frame and is used as a pivot for the upper frame 100 to rotate relative to the lower frame 200, so that the seat is driven to rotate and is adjusted to be in a forward or backward position;

the upper frame 100 further includes a guide 500 connected to the seat reversing mechanism. Guided by the guide member 500, the handle 101 can be synchronously radially displaced and rotationally returned from the initial pushing position to the initial pushing position, so as to horizontally rotate the seat 300 from a forward position to a backward position.

The initial pushing position refers to that when the handle is at the position, the baby carriage can be pushed to move forwards or backwards; in the state shown in fig. 2, the handle is disposed rearward and obliquely upward. The forward position of the seat 300 means that the infant faces in the direction of travel of the stroller when seated on the seat; conversely, the seat-rearward position is a state in which the infant faces the stroller, as shown in fig. 6.

In the present embodiment, the following structure is adopted for each component:

the upper framework 100 comprises a handle 101 and a lower transverse pipe 102; the handle 101 is composed of two vertical pipes 101a parallel to each other and a horizontal pipe 101b arranged between the upper ends of the vertical pipes 101 a; the lower ends of the two vertical pipes are respectively connected with two ends of the lower transverse pipe 102; the upper frame 100 is a square frame as a whole; the guiding member 500 is fixedly connected to the lower cross tube, in this embodiment, the guiding member 500 is a guiding rod, and the guiding member 500 is located at the lower portion of the upper frame 100 and extends outward, i.e. the guiding member 500 is fixedly located at the center of the lower portion of the upper frame and is located on the outward extending line of the longitudinal centerline of the handle, which can be understood as the guiding member 500 is vertically connected to the center of the lower cross tube 102 and is parallel to the two vertical tubes 101 a. The horizontal tube 101b is a part of the handle for the hand of the stroller to push the stroller and change the direction of the operating seat.

The lower frame 200 includes a support frame 201 formed of a pipe member, and a front wheel set 202 and a rear wheel set 203 respectively installed at front and rear sides of a lower end of the support frame, as in the related art stroller. The seat 300 includes a seat portion 302 and a backrest portion 301, which may be integrally formed or rotatably connected to each other, and the seat is disposed above the lower frame, in this embodiment, two seat tubes 302a on two sides of the seat portion 302 are connected to a seat reversing mechanism through two connecting rods 302b on the seat portion 302, and since the seat 300 is substantially identical to the structure adopted by the similar products, the detailed description thereof is omitted in this patent application, as shown in fig. 12 and 14.

The seat reversing mechanism is a universal connecting mechanism and is used as a hinge between the upper frame 100 and the lower frame 200, so that the upper frame can move in at least two directions relative to the lower frame, and can move in at least two moving directions simultaneously. The seat reversing mechanism used in this embodiment includes a fixed seat 401 and a rotating seat 402, the fixed seat is disposed on the upper portion of the lower frame 200 and above the front wheel set 202 and the rear wheel set 203; here, the fixing base is fixedly arranged at the upper end of the supporting frame 201; the rotating seat 402 is arranged at the lower part of the upper framework and is rotationally connected with the fixed seat 401; here, the swivel is provided on the lower cross tube 102. The handle 101 is rotatably connected to the rotary base 402, i.e. the handle can move radially relative to the rotary base; specifically, the rotary seat is sleeved on the lower transverse tube and the rotary seat can rotate relative to each other, the handle 101 is fixedly connected with the lower transverse tube 102, the handle 101 is pushed to drive the lower transverse tube 102 to rotate, the lower transverse tube rotates relative to the rotary seat, and therefore the handle 101 moves relative to the rotary seat 402 along the radial direction of the rotary seat.

The guide 500 is fixedly connected to the lower cross tube 102, so that the guide 500 is also indirectly fixedly connected to the handle bar 101.

The lower cross tube 102 at the lower part of the upper frame is connected with a fixing seat 401 fixed at the upper end of the supporting frame 201 of the lower frame through a rotating seat 402, so that the upper part of the lower frame 200 is connected with the lower part of the upper frame.

In order to connect the fixing base 401 and the rotating base 402 together, and the rotating base 402 can rotate in a plane with the fixing base 401 as an axis, the fixing base 401 adopts a structure that a rotating base mounting part 403 defining a hollow area is fixedly arranged at the upper end or the upper part of the fixing base 401, that is, the rotating base mounting part 403 is circular ring-shaped, and a rotating space 401a for the lower end part of the guiding part 500 to rotate is arranged in the fixing base 401. The rotary base 402 is rotatably connected to the rotary base mounting member 403, so that the rotary base 402 can rotate horizontally relative to the fixed base 401.

The rotary base 402 includes an upper joint base 404 and a lower joint base 405 connected to the upper joint base 404; the joint upper base 404 includes a semi-cylindrical portion 404a and an upper connecting portion 404 b; the lower joint seat 405 includes a first member 406 and a second member 406 ' with the same structure and arranged oppositely and at a distance, the first member 406 includes a lower connecting portion 406a with an arc notch 406b, and an arc portion 406d located at the bottom of the lower connecting portion 406a and having an arc periphery on the outer side, and the first member 406 has an upright plane on the inner side opposite to the second member 406 ', since the second member also has the above structure of the first member, it can be seen that the first member 406 and the second member 406 ' each form a semicircle, the outer side has an arc portion, the inner side has an upright plane, and the inner sides are arranged at a distance to form a straight line gap, which is the radial gap 408 arranged in the rotary seat 402.

As shown in fig. 11 and 14, the two links 302b of the seat portion 302 are placed on the upper surface of the joint upper seat 404, and the two links 302b, the joint upper seat 404, and the joint lower seat 405 are assembled together by four screws.

When in installation, the joint upper seat 404 is buckled at the middle position of the lower transverse pipe 102, the inner wall of the semi-cylindrical part 404a is attached to the outer wall of the lower transverse pipe 102, meanwhile, the annular rotary seat mounting piece 403 and the lower connecting parts 406 and 406' of the joint lower seat 405 are rotatably mounted, the rotary seat mounting piece 403 is fixedly arranged at the upper end of the fixed seat 401, the lower connecting part 406a with the arc-shaped notch 406b is positioned above the rotary seat mounting piece 403, and the arc-shaped notch 406b is also attached to the outer wall of the lower transverse pipe, so that after the joint upper seat 404 and the joint lower seat 405 are fixedly locked, the lower transverse pipe 102 is sheathed in the joint upper seat 404, and the lower transverse pipe 102 can rotate relative to the seat reversing mechanism; at this time, the upper surfaces of the arc-shaped portions 406d of the first member 406 and the second member 406' contact the lower surface of the swivel mount 403, so that the lower joint seat 405 is prevented from being axially separated from the swivel mount 403 and the swivel 402 is allowed to rotate relative to the swivel mount 403, and thus the seat reversing assembly composed of the fixed seat 401 and the swivel 402 connects the upper frame 100 and the lower frame 200 together, and the seat reversing mechanism serves as a hinge between the upper frame 100 and the lower frame 200; and the handle can rotate 360 degrees in the horizontal plane relative to the rotating base mounting part 403 and the fixed base 401. With this arrangement, the radial gap 408, the hollow area in the center of the rotary seat mounting member 403 and the rotating space 401a are communicated with each other, so that the guide member 500 can pass through the inner space, the upper end of the guide member 500 can move in the radial gap, and the lower end of the guide member can move in the rotating space 401a, when the handle 101 is pushed to rotate and the handle moves from a forward position to a backward position, the guide member 500 can linearly move radially in the radial gap 408 and rotate in the rotating space under the driving of the lower cross tube 102, which is also the process of rotating and reversing the seat 300 under the driving of the handle 101.

In order to limit the rotation track of the lower end of the guide 500 and further to guide the rotation track of the handle 101, a guide 600 movably connected to the guide 500 is provided in the rotation space 401a of the fixing base 401. One end of the guide part 600 is hinged with the fixed seat 401, the other end of the guide part is a free end, and the free end of the guide part 600 extends into the rotating space 401 a; the free end of the guide 600 is rotatably coupled to the lower end of the guide 500, which extends into the rotating space 401a, so that the two members can rotate relative to each other. In order to realize that one end of the guide part 600 is hinged with the fixed seat 401, a connecting piece 7 is fixedly arranged on the fixed seat 401, the connecting piece 7 can be made of a metal sheet and is integrated with the fixed seat 401, the free end of the connecting piece 7 is hinged with the guide part 600, and the guide part 600 is slightly shorter than the connecting piece 7; the guide 600 is a bent metal plate, and in order to match the position of the guide 500, a metal plate having an obtuse bent portion is preferably used to match the rotation of the guide.

The commutation process of this embodiment is: in the initial state, i.e. the handle 101 is in the initial pushing position, the guiding element 500 is obliquely inserted through the radial gap 408 and extends into the rotating space 401a, the angle between the guiding portion 600 and the connecting element 7 of the fixing base is 180 degrees, and the seat 300 faces forward, as shown in fig. 2 and 7; because of the interference between the guide member 500 and the guide portion 600, the handle cannot be directly pushed back and forth linearly to displace radially relative to the rotary base 402 for reversing; when the direction change operation is performed, as shown in fig. 2-6 sequentially, the handle 101 is pushed forward clockwise from the initial pushing position to rotate the entire upper frame 100, so as to drive the rotating base 402 to rotate clockwise in the horizontal plane relative to the fixed base 401, and at the same time, the seat 300 rotates along with the handle 101, wherein, by the lower end of the guiding member 500 being limited by the guiding portion 600 in the rotating space 401a and rotating clockwise around the hinge axis between the guiding portion 600 and the connecting member 7, the guiding portion 600 also rotates clockwise to approach the connecting member 7, and the upper section of the guiding member 500 being limited by the radial gap 408 of the rotating base, when the rotating base 402 starts to rotate clockwise, the guiding member 500 performs corresponding radial displacement in the radial gap 408, and the upper section of the guiding member 500 gradually moves toward the center of the radial gap 408 from one end of the radial gap 408 corresponding to the rotation of the lower end of the guiding member 500 toward the connecting member 7, it can be seen that the angled guides 500 are progressively more or less straight, as shown in FIGS. 7-10;

when the handle 101 is rotated to be substantially at the upright position of fig. 10, that is, the guiding member 500 is also substantially at the upright position, which is close to or overlapped with the upright axis of the rotating base 402 rotating horizontally relative to the fixed base 401, wherein the guiding portion 600 at the lower end of the guiding member 500 is overlapped with the connecting member 7, and the upper section of the guiding member 500 is substantially at the center of the radial gap 408, at this time, the using directions of the handle 101 and the seat 300 are not in the same line with the traveling directions of the front and rear wheel sets, and the seat reversing is not completed, as shown in fig. 4 and fig. 10; continuing to rotate the handle 101 clockwise to start pulling the handle backward, as shown in fig. 5, at the same time, the guide portion 600 also continues to rotate clockwise to start to move away from the connecting member 7, and the upper segment of the guide member 500 moves from the center of the radial gap 408 toward the other end of the radial gap 408 gradually corresponding to the rotation of the lower end of the guide member 500 away from the connecting member 7, so that the guide member 500 and the handle 101 are gradually inclined; until the handle returns to the original position, that is, the handle is initially pushed, the guiding portion 600 and the fixing seat connecting member 7 form an angle of 180 degrees again, at this time, the sitting direction of the infant is changed, the seat faces backwards, and the reversing process is completed, as shown in fig. 6.

The whole seat reversing process forms a circle, the handle 101 is reversed from the original pushing position by pushing forward counterclockwise, the guide 500 and the guide 600 start the circle counterclockwise, and the seat reversing effect can be achieved by the circle being reversed counterclockwise. The operator can operate the handle 101 to complete seat reversing by approximately drawing a circle within the arm movement range, and a humanized operation mode is adopted, so that multiple operation steps are omitted, and the chair is more convenient.

As shown in fig. 12-15, the second embodiment of the present invention is different from the first embodiment only in that a first gear 8 is fixed at the lower end of the guide 500, a second gear 9 is fixed at the position of the fixed seat 401, which is in axial contact with the guide 600, and a transition gear 10 engaged with the first gear 8 and the second gear 9 is arranged between the two gears; the transition gear 10 is coupled to the middle of the guide part 600; the guide part 600 is also hinged with a connecting piece 7 fixed on the fixed seat by adopting a bent iron sheet; the second gear 9 is fixed on the connecting member 7 at a position where the connecting member 7 is coupled to the guide portion 600. The commutation process of this embodiment is the same as that of the first embodiment. The gear set has the advantages that the handle can move more smoothly when the handle moves in the radial direction and rotates horizontally, namely, when the handle moves in two directions simultaneously, the smooth operation is facilitated, and the idle rotation problem when the handle rotates to a roughly vertical position is avoided.

As shown in fig. 16 to 17, a third embodiment of the present invention, compared to the first embodiment,

the fixing base 401 has a rotating cavity wall 401b defining a rotating space 401a, the guiding portion 600 does not adopt a bent iron sheet, but adopts a circular guide rail concavely arranged in the rotating cavity wall 401b as a guiding portion, the circular guide rail is located in the range of the rotating path of the lower end portion of the guiding member 500 for the lower end of the guiding member 500 to move therein, and is used for limiting the moving track of the lower end portion of the guiding member 500, and further limiting the moving path of the handle 101 connected with the guiding member, when the handle 101 is in the pushing position, the guiding member 500 is inclined relative to the fixing base 401, the lower end thereof is located in the circular guide rail at the farthest position from the vertical axis, i.e. farthest from the center of the fixing base 401, when the handle is rotated clockwise or counterclockwise to a substantially vertical position, the lower end of the guiding member 500 is located in the circular guide rail at the position closest to the vertical axis or at the position overlapped with the vertical axis, i.e. near or overlapping the center of the mounting 401. The commutation process of this embodiment is the same as that of the first embodiment.

In order to prevent the guide member 500 from idling, an idling prevention member 11 is further fixedly installed on the guide member 500, and when the handle 101 is radially displaced relative to the rotary base 402 and is in the substantially upright position during the reversing operation, the guide member 500 is in the upright position, and the idling prevention member 11 is in contact with the rotary cavity wall 401b, so as to prevent the handle 101 from being unable to smoothly return to the original pushing position due to idling. The idle rotation preventing member 11 is a pair of protrusions protruding from opposite sides of the outer wall of the guide member 500, or is formed to protrude around the outer wall of the guide member 500 in a disc shape.

The handle 101, guide 500 being in a generally upright position means that they are both angled approximately 90 degrees from horizontal, such as greater than 85 degrees.

While the present invention has been described with respect to the embodiments, those skilled in the art will appreciate that there are numerous variations and permutations of the present invention without departing from the spirit of the invention, and it is intended that the appended claims cover such variations and modifications as fall within the true spirit of the invention.

Claims

1. A stroller having a seat reversing mechanism, comprising: an upper frame provided with a handle, wherein the handle is provided with a pushing position for pushing the baby carriage;

a seat arranged above the lower frame;

the seat reversing mechanism is arranged between the upper frame and the lower frame and is used as a pivot for the upper frame to rotate relative to the lower frame, so that the seat is driven to rotate and is adjusted to be in a forward or backward position;

the upper framework also comprises a guide piece connected with the seat reversing mechanism, and the handle can synchronously radially displace and rotate from an initial pushing position and return to the initial pushing position through the guide of the guide piece so as to drive the seat to horizontally rotate from a forward position to a backward position;

the seat reversing mechanism at least comprises a fixed seat and a rotating seat, and the fixed seat is arranged at the upper part of the lower frame and is positioned above the front wheel set and the rear wheel set; the rotating seat is arranged at the lower part of the upper framework and is horizontally and rotatably connected with the fixed seat; the handle is rotationally connected with the rotating seat, namely, the handle can move along the radial direction of the rotating seat relative to the rotating seat;

the rotating seat is internally provided with a radial gap, the fixed seat is internally provided with a rotating space, the radial gap is communicated with the rotating space and is penetrated by the guide piece, and the guide piece can make radial displacement in the radial gap and can rotate in the rotating space.

2. The stroller of claim 1, wherein a guide portion is movably connected to the guide member in the rotation space of the fixing base.

3. The stroller of claim 2, wherein the guide portion has one end pivotally connected to the fixed seat and the other end being a free end; the free end of the guide part is rotatably connected with the lower end part of the guide piece positioned in the rotating space.

4. The stroller of claim 3, wherein a first gear is fixed to a lower end of the guide member, a second gear is fixed to the stationary seat at a position where the stationary seat is coupled to the guide member, and a transition gear engaged with the first gear and the second gear is provided between the first gear and the second gear; the transition gear is connected to the middle part of the guide part in a gear way.

5. The stroller of claim 2, wherein the fixed base has a rotating chamber wall defining a rotating space, and the guide portion is an annular guide rail recessed in the rotating chamber wall, the annular guide rail allowing the lower end of the guide member to move therein.

6. A stroller with a seat reversing mechanism according to claim 5, wherein an anti-lost motion member is provided on the guide member, and wherein the guide member is subsequently in an upright position when the handle is radially displaced relative to the swivel base and in a position close to the upright position, wherein the anti-lost motion member is in contact with the wall of the swivel chamber.

7. The stroller of claim 1, wherein the lower portion of the upper frame further comprises a lower cross tube, and the guide member is fixed to the lower cross tube; the rotary seat comprises a joint upper seat and a joint lower seat connected with the joint upper seat; the rotary seat is sleeved on the lower transverse pipe and can rotate relatively; the joint lower seat comprises a first part and a second part, and a radial gap for the guide piece to penetrate is formed between the first part and the second part.

8. The stroller of claim 1, wherein the guide member is a guide bar centrally disposed under the upper frame and located on an outward extension of a longitudinal centerline of the handle.

9. The stroller of claim 1, wherein the seat reversing mechanism further comprises a swivel mounting member defining a hollow space and fixed to or above the fixed base, the swivel being rotatably coupled to the swivel mounting member for horizontal rotation of the swivel relative to the fixed base, the radial gap, the hollow space of the swivel mounting member and the swivel space being in communication with each other for the guide member to pass therethrough.

10. The stroller of claim 3, wherein a connecting member is fixed to the fixing base and has a free end extending to be coupled to the guide portion.

11. The stroller of claim 3, wherein said guide portion comprises a bend.