CN222360995U

CN222360995U - Baby stroller frame

Info

Publication number: CN222360995U
Application number: CN202420866623.6U
Authority: CN
Inventors: 王品其; 孟胜军; 刘柳
Original assignee: Zhejiang Jinhua Xuebei Baby Products Manufacturing Co ltd
Current assignee: Zhejiang Jinhua Xuebei Baby Products Manufacturing Co ltd
Priority date: 2024-03-25
Filing date: 2024-04-24
Publication date: 2025-01-17
Anticipated expiration: 2034-04-24
Also published as: PL132536U1; GB2639999A; GB202408755D0; DE202024102937U1; CN118238888A

Abstract

The utility model belongs to the field of strollers, and particularly relates to a frame of a stroller. The baby carriage frame comprises a base, frame front legs, frame rear legs, frame connecting handrails and a seat, and is characterized in that the upper ends of the frame front legs are rotatably hinged to the base, the upper ends of the frame rear legs are fixedly connected to the base, the lower ends of frame handles are rotatably hinged to the base, a rear seat plate of the seat is connected to the base through a shaft or a shaft assembly and can rotate relative to the base, and a transmission connecting rod mechanism for achieving synchronous linkage folding of the frame front legs, the frame rear legs and the frame handles is arranged among the frame front legs, the frame rear legs and the frame handles. According to the utility model, the connection structure of the rear seat plate and the rear legs of the frame is improved, so that the relative positions of the rear seat plate and the rear legs of the frame are changed, and enough space is reserved for the folded backrest in the vertical direction, so that the length of the backrest is increased, and the comfort level is improved.

Description

Baby carriage frame

Technical Field

The utility model belongs to the field of strollers, and particularly relates to a stroller and a frame.

Background

The foldable baby carriage is convenient to transport and carry, and provides convenience for the baby to go out. The structural dimensions of the components such as the seat, the armrest, the backrest and the like of the common baby carriage and the specification dimensions of the folded whole baby carriage are mutually influenced and restricted. For example, backrests generally have both resting and lying functions, with backrests of sufficient length to facilitate comfort, but too long backrests tend to result in poor folding or excessive folding volume.

As disclosed in CN212766425U, a convenient-to-fold baby carriage frame has a rear seat plate fixed at the upper end of a rear strut, and after being fully folded, the rear seat plate is fixed at the upper end of the rear strut in a relatively inclined manner, and as can be seen from the accompanying drawings, the length of a backrest is limited due to the limitation of the length of the rear strut (i.e. the height of the folded baby carriage), otherwise, if the length of the backrest is increased, the length of the rear strut is necessarily increased at the same time, and the height of the whole frame is necessarily increased. In the use process of the baby carrier or the baby carrier, the backrest with enough length can improve the comfort level of leaning on a seat or lying down and can also expand the applicable height.

Currently, the length of the integrated backrest in a stroller is generally about 430 mm, and as the height of the baby grows, the head is higher than the backrest, so that leaning is uncomfortable. For this reason, some strollers add additional head support above the backrest, or the backrest is configured in two sections so that the backrest is folded when the stroller is folded, but the two sections of the backrest have obvious discontinuities or uneven feeling when lying flat, which affects comfort and even spinal development.

Disclosure of Invention

The utility model mainly aims at the problem of mutual constraint between the backrest of the existing baby carriage and the folding of the whole carriage, and discloses a baby carriage frame, wherein the relative position of the rear seat plate and the frame rear foot is changed by improving the connecting structure of the rear seat plate and the frame rear foot, namely, the position of the rear seat plate is lifted upwards, so that enough space is reserved for the folded backrest in the vertical direction, the length of the backrest is basically equal to that of the frame rear foot, the length of the backrest is increased, and the comfort level is improved.

The utility model aims at realizing the technical scheme that the baby carriage frame comprises a base at the middle part, a front frame leg connected to the base and positioned in the oblique front of the base, a rear frame leg connected to the base and positioned in the oblique rear of the base, a frame handle connected to the base and positioned in the oblique upper of the base, and a seat arranged at the middle part of the frame, wherein the seat comprises a rear seat plate, a front seat plate hinged to the front side of the rear seat plate and a backrest arranged at the rear of the rear seat plate.

And a transmission link mechanism for realizing synchronous linkage folding of the front foot, the rear foot and the frame handle is arranged among the front foot, the rear foot and the frame handle.

The front foot of the frame, the rear foot of the frame and the base are hinged with the base and can rotate around the hinge point on the base, meanwhile, the frame handle is formed by hinging the upper handle of the frame and the lower handle of the frame up and down, a locking control device is arranged between the upper handle of the frame and the lower handle of the frame, when the upper handle of the frame and the lower handle of the frame are unlocked, the front foot of the frame can be oppositely folded, the front foot of the frame is rotated towards the rear foot of the frame and is simultaneously rotated downwards towards the rear foot of the frame while being folded until the rear foot of the frame is mutually close, the rear foot of the frame is in a vertical position, and the rear seat plate can rotate to a position approximately perpendicular to the base (or the rear foot) relative to the base and is also approximately perpendicular to the rear seat plate when the rear seat plate is folded because the seat is in a three-fold structure, and the rear seat plate is also approximately perpendicular to the rear seat plate.

The back is hinged to the rear end of the rear seat board, when the back is folded, the back is turned downwards and is close to the rear foot of the frame, and as the rear seat board is positioned above the rear foot of the frame after the back is folded, the containing space of the back can extend downwards from the upper end of the rear foot of the frame, the longest length of the back can be set as the sum of the length of the rear foot of the frame and the height of wheels, and conditions are provided for the increase of the length of the back.

Preferably, the base is formed by two symmetrical bases, and the rear seat plate is rotatably hinged between the two bases through a shaft. In order to improve the overall stability of the frame, a fixed shaft is usually added between two symmetrical bases, and the rear seat plate can be directly hinged to the inner side of the base through a shorter shaft which is completely independent of the fixed shaft.

Preferably, the base is composed of two symmetrical bases, the rear seat plate is hinged between the two bases through a shaft assembly, the shaft assembly comprises a fixed shaft fixedly connected with the two bases and a shaft sleeve connected with the fixed shaft in a ring sleeve, and the shaft sleeve is fixedly connected with the rear seat plate, so that the rear seat plate is hinged with the bases relatively.

In order to further simplify the structure, the hinge joint of the front foot of the frame and the base and the junction of the rear seat plate and the base can be simultaneously arranged at the connecting part of the fixed shaft and the base, namely, the three parts are coaxial.

Preferably, a seat board supporting piece for supporting the rear seat board and limiting the rotation amplitude of the rear seat board is arranged on the inner side of the base, and the rear seat board and the seat board supporting piece are mutually abutted when the frame is in a unfolded state.

When the frame is unfolded, the rear foot of the frame is inclined downwards, the rear seat plate is approximately horizontal, at the moment, in order to stabilize the rear seat plate to be kept at an approximately horizontal position, a seat plate supporting piece is fixed at the inner side of the base and at a position corresponding to the lower part of the rear seat plate, and the rear seat plate is arranged on the seat plate supporting piece.

Preferably, the frame handle comprises an upper frame handle and a lower frame handle, wherein the lower end of the lower frame handle is hinged to the base, the middle lower part of the upper frame handle is hinged to the upper end of the lower frame handle, and a locking device for locking and unlocking the upper frame handle and the lower frame handle is arranged between the upper frame handle and the lower frame handle.

Preferably, the transmission link mechanism comprises a first link, a second link, a third link and a sliding piece, wherein the upper end of the first link is rotatably hinged to the lower end of an upper handle of the frame, the lower end of the first link is hinged to the sliding piece, the front end of the second link is hinged to a front foot of the frame, the rear end of the second link is hinged to the front end of the third link, the rear end of the third link is hinged to a rear foot of the frame, and the sliding piece is sleeved on the third link in a sliding manner.

When the frame is in a unfolding state, the frame handle, the frame front foot, the first connecting rod, the second connecting rod and the third connecting rod form a stable triangular structure, and the front seat plate, the rear seat plate, the short connecting rod and the frame front foot form a stable triangular structure.

When the frame is folded, the locking control device is operated to release the locking between the upper frame handle and the lower frame handle, the upper frame handle is pushed forwards, the upper frame handle and the lower frame handle are folded in half and turned downwards, the first connecting rod is driven to turn downwards in the folding and turning downwards process of the upper frame handle and the lower frame handle, the first connecting rod simultaneously drives the sliding sleeve piece, the second connecting rod and the third connecting rod to slide and turn correspondingly, otherwise, when the frame is unfolded, the upper frame handle handrail is lifted upwards, so that the upper frame handle and the lower frame handle assembly which are folded in half gradually unfold, the first connecting rod is driven to turn upwards, the second connecting rod and the third connecting rod are simultaneously driven to unfold and support between the front foot and the rear foot of the frame, the first connecting rod and the sliding piece are unfolded between the rear foot of the frame and the frame handle, and after the frame handle and the base are locked again, the relative positions of the first connecting rod, the second connecting rod and the third connecting rod are kept stable, and the whole frame is unfolded firmly.

Preferably, a seat armrest is arranged above the seat and connected with the base, the seat armrest is U-shaped, the end parts of the side bars at the two sides of the seat armrest are connected with the base, and the axial directions of the side bars at the two sides of the seat armrest are parallel to the axial directions of the rear feet of the frame.

The seat armrest is relatively fixed on the base, and the axial direction of the side rod of the seat armrest is parallel to the axial direction of the rear foot of the frame, so that the seat armrest can be turned over from an inclined position along with the base to a position which is approximately vertical upwards (the rear foot of the frame is approximately vertical downwards) after the frame is folded, and the seat armrest is used as a handle after the frame is folded.

Preferably, the seat armrest is U-shaped, side rods at two sides of the seat armrest extend towards the direction of the lower frame handle and the first connecting rod, the side rods at two sides of the seat armrest are hinged to the lower frame handle at first, the end parts of the side rods at two sides of the seat armrest are hinged to a bending connecting rod, the lower ends of the bending connecting rod are hinged to the first connecting rod, and when in a folding state, the axial directions of the side rods at two sides of the seat armrest are parallel to the axial directions of rear feet of the frame and the directions of the seat armrest and the rear feet of the frame are opposite.

When the frame is folded, the first connecting rod and the lower frame hand are mutually close to each other and simultaneously turn downwards to drive the whole seat armrest to turn upwards, and meanwhile, the bent connecting rod turns upwards relative to the first connecting rod, and finally, the seat armrest is in a position approximately vertically upwards (the rear feet of the frame are approximately vertically downwards) and is used as a handle after the frame is folded.

Preferably, a transverse shaft is connected between the side bars at the two sides of the front foot of the frame, the lower end of the short connecting rod is hinged to the transverse shaft, and a transverse rod piece is connected between the side bars at the two sides of the rear foot of the frame. The transverse shaft is added, so that the stability of the frame is improved, and the lower end of the short connecting rod for supporting the front seat plate of the seat can be hinged to the transverse shaft or can be directly hinged to the front foot of the frame.

The utility model also provides a baby carriage which comprises the baby carriage frame and is characterized in that an awning is arranged on a handle of the baby carriage frame, front wheels are arranged at the lower ends of front legs of the baby carriage frame, and rear wheels are arranged at the lower ends of rear legs of the baby carriage frame.

Compared with the prior art, the utility model has the following beneficial effects:

The baby carriage frame changes the relative positions of the rear seat plate and the rear legs of the frame by improving the connection structure of the rear seat plate and the rear legs of the frame, namely, the position of the rear seat plate is lifted upwards, so that enough space is reserved for a folded backrest in the vertical direction, the length of the backrest is basically equal to that of the rear legs of the frame, the length of the backrest is increased, the comfort level is improved, and one-step linkage folding is realized through the cooperation of a locking control device and a transmission connecting rod.

The baby carriage provided by the utility model has the advantages that the connection structure of the rear seat plate and the rear legs of the carriage is improved, so that the relative position of the rear seat plate and the rear legs of the carriage is changed, namely, the position of the rear seat plate is upwards lifted, further, enough space is reserved for the folded backrest in the vertical direction, the length of the backrest is basically equal to that of the rear legs of the carriage, the length of the backrest is increased, the comfort level is improved, one-step linkage folding is realized through the cooperation of the locking control device and the transmission connecting rod, and all parts of the baby carriage after being folded are compact, the whole shape is more square and regular, and the baby carriage is convenient to transport and carry.

Drawings

FIG. 1 is a schematic view of a stroller frame according to the present utility model;

FIG. 2 is a side view (partially cut away) of the stroller frame of the present utility model;

FIG. 3 is an enlarged view of a portion of FIG. 2 in partial cross section;

FIG. 4 is a side view of the present utility model in a folded state;

fig. 5 is a schematic view of the folded state of the present utility model.

Fig. 6 is a schematic view of another embodiment of the seat armrest of the present utility model.

Fig. 7 is a schematic view showing a folded state of another embodiment of the present utility model.

The figure is marked with 1, front foot of the frame, 10, base, 11, short connecting rod, 12, transverse shaft, 13, front wheel

2. Frame rear foot, 21, cross bar piece, 22, rear wheel, 3, frame handle, 31, frame upper handle, 32, frame lower handle, 33, locking device;

4. Seat, 41, rear seat board, 42, front seat board, 43, shank rest, 44, backrest, 45, seat armrest, 46, bending link, 47, extension bar;

5. Shaft assembly, 51, fixed shaft, 52, shaft sleeve, 53, seat plate support;

6. the device comprises a transmission link mechanism, 61, a first link, 62, a second link, 63, a third link, 64 and a sliding piece.

Detailed Description

The utility model is further described below with reference to embodiments shown in the drawings in which:

Example 1:

As shown in fig. 1 and 2, a stroller frame mainly comprises a base 10, a frame front leg 1, a frame rear leg 2, a frame handle 3, a seat 4, and the like, wherein the frame front leg 1, the frame rear leg 2, and the frame handle 3 are distributed substantially radially about the base 10.

The upper end of the front frame leg 1 is rotatably hinged with the base 10 through a shaft and positioned in the oblique front of the base 10, the upper end of the rear frame leg 2 is fixedly connected with the base 10 and positioned in the oblique rear of the base 10, and the lower end of the frame handle 3 is rotatably hinged with the base 10 and positioned in the oblique upper side of the base 10.

The frame handle 3 is formed by hinging an upper frame handle 31 and a lower frame handle 32, wherein the lower end of the lower frame handle 32 is hinged to the base 10, the middle lower part of the upper frame handle 31 is hinged to the upper end of the lower frame handle 32, and a locking control device 33 for locking and unlocking the upper frame handle 31 and the lower frame handle 32 is arranged between the upper frame handle 31 and the lower frame handle 32.

The seat 4 is connected to the base 10, specifically, the seat 4 is composed of a rear seat plate 41, a front seat plate 42, a lower leg rest 43 and a backrest 44 from the rear to the front, the front seat plate 42 is hinged to the rear seat plate 41, the lower leg rest 43 is hinged to the front seat plate 42, and the backrest 44 is hinged to the rear seat plate 41.

Alternatively, the backrest 44 may be directly attached to a awning cloth, the upper portion of which acts as an awning, and the lower portion of which is fixed to the backrest, and the awning cloth is tightened and loosened by a binding belt, thereby adjusting the inclination angle of the backrest, such as tilting or tiling.

As shown in fig. 3, the rear seat plate 41 is rotatably hinged to the base 10 by a shaft assembly 5, and the shaft assembly 5 is composed of a fixed shaft 51 and two shaft sleeves 52 which are connected to the fixed shaft 51 in a ring, wherein the fixed shaft 51 is connected between two symmetrical bases 10, and the middle part of the bottom surface of the rear seat plate 41 is fixedly connected with the two shaft sleeves 52.

In order to simplify the frame structure, the hinge joint between the upper end of the frame front foot 1 and the base 10 is the joint between the fixed shaft 51 and the base 10, i.e. the frame front foot 1 is hinged to the end of the fixed shaft 51, and the two shaft sleeves 52 are respectively close to the corresponding base 10.

A seat board supporting member 53 is fixed on the inner side of the base 10 and below the corresponding rear seat board 41, the rear seat board supporting member 53 is used for limiting the rotation amplitude of the rear seat board 41 and supporting the rear seat board 41 from bottom to top to be in a horizontal position, and when the frame is in an unfolded state, the seat board supporting member 53 is positioned below the rear seat board 41 and is mutually abutted.

A group of short connecting rods 11 are hinged between the front seat plate 42 and the upper part of the front foot 1 of the frame, and the main function of the short connecting rods 11 is to support the front seat plate 42 when the frame is unfolded, and the other function is to guide the overturning direction and folding in place of the front seat plate 42 when the frame is folded. Specifically, a transverse shaft 12 is connected between the side bars on both sides of the front foot 1 of the frame, the upper end of the short link 11 is hinged to the front seat plate 42, and the lower end of the short link 11 is hinged to the transverse shaft 12.

A cross bar piece 21 is connected between the side bars at the two sides of the frame rear foot 2 so as to improve the firmness of the frame rear foot 2.

A transmission link mechanism 6 for realizing synchronous linkage folding of the three is arranged among the frame front foot 1, the frame rear foot 2 and the frame handle 3, and the transmission link mechanism 6 is composed of a first link 61, a second link 62, a third link 63 and a sliding piece 64.

The upper end of the first link 61 is rotatably hinged to the lower end of the upper handlebar 31 of the vehicle frame, the lower end of the first link 61 is hinged to the upper end of the sliding member 64, the front end of the second link 62 is hinged to the front foot 1 of the vehicle frame, the rear end of the second link 62 is hinged to the front end of the third link 63, the rear end of the third link 63 is hinged to the rear foot 2 of the vehicle frame, and the lower portion of the sliding member 64 is slidably sleeved on the third link 63.

In order to improve the smoothness of the action of the transmission connecting rod assembly during the rotation and folding, the end parts of the first connecting rod, the second connecting rod and the third connecting rod are respectively arranged to be slightly bent and tilted.

A U-shaped seat armrest 45 is arranged above the seat 4, two ends of the seat armrest 45 are fixedly connected to the base 10 and are close to the frame handlebar 3, and the axial directions of the side rods at two sides of the seat armrest 3 are parallel to the axial directions of the frame rear feet 2.

In the folding state shown in fig. 4 and 5, the folding process is that the locking between the upper frame handle 31 and the lower frame handle 32 is released, the upper frame handle 31 is slightly pushed forward, the upper frame handle 31 and the lower frame handle 32 are oppositely folded and integrally turned downwards, so that the first connecting rod 61 is driven to be turned downwards, the sliding piece 64 slides forwards, the second connecting rod 62 and the third connecting rod 63 are oppositely folded and turned upwards, the front frame leg 1 is guided to be close to the rear frame leg 2, the front seat plate 42 is driven to be turned downwards by the short connecting rod 11, the rear seat plate 41 is driven to be turned to be vertical to the rear frame leg 2 by the base 10, the backrest 44 is synchronously turned downwards to be approximately parallel to the rear frame leg 2 by the driving of the frame handle 3, and the seat armrests 45 are driven to be upwards along with the base 10 to be used as handles, and the rest parts are all close to the rear frame leg 2.

Example 2:

as shown in fig. 6 and 7, compared with the embodiment 1, the difference of the present embodiment is that the seat rail 45 is U-shaped, the side bars at both sides of the seat rail 45 extend toward the lower frame handle 32 and the first link 61 until they are connected, and a length of extension bar 47 is actually added to the side bars of the seat rail 45 due to the longer extending distance, specifically, the side bars at both sides of the seat rail 45 are detachably connected to the extension bar 47, the detachable connection structure can be a snap-press detachment and connection structure, the extension bar 47 is hinged to the lower frame handle 32 through a short shaft or a pin shaft and is close to the base 10, the end of the extension bar 47 is hinged to a curved link 46, the upper end of the curved link 46 is hinged to the end of the extension bar 47, and the lower end of the curved link 46 is hinged to the middle lower portion of the first link 32.

In the folded state, the axial direction of the side bars on both sides of the seat armrest 45 is parallel to the axial direction of the frame rear foot 2, and the seat armrest 45 is opposite to the frame rear foot 2.

When the frame is unfolded, the first connecting rod 61 and the frame lower handle 32 are relatively stable, the side rods, the bending connecting rods 46, the first connecting rod 61 and the frame lower handle 32 on two sides of the seat armrest 45 form a stable triangular structure, when the frame is folded, the first connecting rod 61 and the frame lower handle 32 are close to each other and simultaneously turn downwards to drive the seat armrest 45 to integrally turn upwards, meanwhile, the bending connecting rod 46 turns upwards relative to the first connecting rod 61, and finally, the seat armrest 45 is in a position approximately vertical upwards and is used as a handle after the frame is folded.

Example 3:

In comparison with embodiments 1 and 2, the difference between the present embodiment is that the hinge portion between the upper end of the front frame leg 1 and the base 10 and the hinge portion between the rear seat plate 41 and the base 10 are not located at the same position, and the latter is located obliquely above the former.

The upper end of the front foot 1 of the frame is correspondingly hinged with the base 10 through a short shaft.

The rear seat board 41 is rotatably hinged to the base 10 through a shaft assembly 5, the shaft assembly 5 is composed of a fixed shaft 51 and two shaft sleeves 52 which are sleeved on the fixed shaft 51, wherein the fixed shaft 51 is connected between two symmetrical bases 10, and the middle part of the bottom surface of the rear seat board 41 is fixedly connected with the two shaft sleeves 52.

Example 4:

The two sides of the back seat board 41 are correspondingly hinged to the base 10 through short shafts, and a limiting component for limiting the rotation amplitude of the back seat board 41 is arranged between the back seat board 41 and the base 10.

The limiting assembly is composed of a first limiting member 53 and a second limiting member 54, wherein the second limiting member 54 is arranged as a protruding portion which protrudes relatively from the inner side of the base 10, and the first limiting member 53 is arranged as an extending portion with one end fixed on the rear seat plate 41 and extending towards the second limiting member 54, when the frame is in a unfolded state, the end portion of the first limiting member 53 can be placed on the second limiting member 54 and form interference or mutual clamping, so that the rear seat plate 41 is stably in a horizontal position.

A fixed shaft 51 is connected between the two symmetrical bases 10, and the upper end of the front frame leg 1 is hinged to the end of the fixed shaft 51.

Example 5:

A stroller employing a stroller frame according to embodiments 1-4, an awning is mounted on the frame handle 3, front wheels 13 are mounted on the lower ends of the frame front legs 1, and rear wheels 22 are mounted on the lower ends of the frame rear legs 2.

The awning cloth of the awning extends downwards to the backrest 44 and covers the outer side surface of the whole backrest, and the angle adjustment and the lying state of the backrest 44 are realized through the binding belt with the buckle, which is arranged on the outer side of the awning cloth.

The specific embodiments described herein are offered by way of example only to illustrate the spirit of the utility model. Those skilled in the art may make various modifications or additions to the described embodiments or substitutions thereof without departing from the spirit of the utility model or exceeding the scope of the utility model as defined in the accompanying claims.

Claims

1. A baby carriage frame comprises a base (10) positioned in the middle, a frame front foot (1) connected to the base and positioned in the oblique front of the base, a frame rear foot (2) connected to the base and positioned in the oblique rear of the base, a frame handle (3) connected to the base and positioned in the oblique upper side of the base, and a seat (4) arranged in the middle of the frame, wherein the seat (4) comprises a rear seat plate (41), a front seat plate (42) hinged to the front side of the rear seat plate, and a backrest (44) arranged behind the rear seat plate (41), and is characterized in that the upper end of the frame front foot (1) is rotatably hinged to the base (10), the upper end of the frame rear foot (2) is fixedly connected to the base (10), and the lower end of the frame handle (3) is rotatably hinged to the base (10), the rear seat plate (41) of the seat (4) is connected to the base (10) through a shaft or a shaft assembly (5), and the rear seat plate (41) can rotate relative to the base (10), and a connecting rod (11) is hinged between the front seat plate (42) and the upper end of the frame front foot (1);

A transmission link mechanism (6) for realizing synchronous linkage folding of the front frame leg (1), the rear frame leg (2) and the frame handle (3) is arranged between the front frame leg and the rear frame leg.

2. The stroller frame according to claim 1, characterized in that the base (10) is constituted by two symmetrical bases, the rear seat plate (41) being rotatably hinged between the two bases (10) by means of an axle.

3. A stroller frame according to claim 1, characterized in that the base (10) is constituted by two symmetrical bases, the rear seat plate (41) being hinged between the two bases (10) by means of a shaft assembly;

The shaft assembly (5) comprises a fixed shaft (51) fixedly connected with the two bases (10) and a shaft sleeve (52) connected with the fixed shaft (51) in a ring sleeve mode, and the shaft sleeve (52) is fixedly connected with the rear seat plate (41).

4. A stroller frame according to claim 2 or 3, characterized in that the inner side of the base (10) is provided with a seat plate support member (53) for supporting the rear seat plate (41) and limiting the rotational amplitude of the rear seat plate (41), the rear seat plate (41) and the seat plate support member (53) abutting each other when the frame is in the unfolded state.

5. The stroller frame according to claim 1, characterized in that the frame handle (3) comprises an upper frame handle (31) and a lower frame handle (32), wherein the lower end of the lower frame handle (32) is hinged to the base (10), and the middle lower part of the upper frame handle (31) is hinged to the upper end of the lower frame handle (32);

a locking device (33) is arranged between the upper frame handle (31) and the lower frame handle (32).

6. The stroller frame according to claim 5, wherein the transmission link mechanism (6) comprises a first link (61), a second link (62), a third link (63) and a sliding member (64), wherein the upper end of the first link (61) is rotatably hinged to the lower end of the upper handlebar (31) of the frame, the lower end of the first link (61) is hinged to the sliding member (64), the front end of the second link (62) is hinged to the front frame leg (1), the rear end of the second link (62) is hinged to the front end of the third link (63), the rear end of the third link (63) is hinged to the rear frame leg (2), and the sliding member (64) is slidably sleeved on the third link (63).

7. The stroller frame according to claim 4, wherein a seat rail (45) is provided above the seat, the seat rail (45) is connected to the base (10), the seat rail (45) is U-shaped, and side bar ends on both sides of the seat rail are connected to the base.

8. The stroller frame according to claim 4, wherein a seat armrest (45) is provided above the seat, the seat armrest (45) is U-shaped, side bars on both sides of the seat armrest (45) extend toward the lower frame handle (32) and the first link (61), the side bars on both sides of the seat armrest (45) are hinged to the lower frame handle (32) first, the end parts of the side bars on both sides of the seat armrest (45) are hinged to a bending link (46), and the lower ends of the bending link (46) are hinged to the first link (61).

9. The baby carriage frame according to claim 1, wherein a transverse shaft (12) is connected between side bars on two sides of the front frame leg (1), the lower end of the short connecting rod (11) is hinged to the transverse shaft (12), and a transverse rod piece (21) is connected between side bars on two sides of the rear frame leg (2).