CN211281171U - Portable cart frame and baby carriage - Google Patents

Abstract

The present disclosure relates to a portable stroller frame and a stroller. Portable shallow frame includes: the front leg rod and the two front wheel sets are arranged at the lower end of the front leg rod; the rear leg rod and the two rear wheel sets are arranged at the lower end of the rear leg rod; the two first joints are fixedly connected with the rear foot rod and are pivoted with the upper end of the front foot rod; the rear foot rod comprises a fixed support and two swinging rods, the two ends of the fixed support are fixedly connected with the two first joints respectively, the upper ends of the two swinging rods are rotatably connected with the fixed support, the lower ends of the two swinging rods are connected with the two rear wheel sets respectively, and the two swinging rods can swing relative to the fixed support in the folding process of the portable trolley frame to adjust the distance between the two rear wheel sets. The disclosed embodiments can be folded to smaller sizes.

Description

Portable cart frame and baby carriage

Technical Field

The present disclosure relates to a portable stroller frame and a stroller.

Background

To facilitate carrying of the infant away from home, people often use strollers to carry the infant. Due to the large size of the stroller, the stroller is typically designed to be collapsible for easy storage or transport. Some of the related art strollers may be folded, but the folded size is still difficult to store on a luggage rack of a public transportation vehicle such as an airplane, which causes inconvenience to a user who needs to expend efforts to handle the delivery procedure of the stroller.

Disclosure of Invention

In view of the above, the disclosed embodiments provide a portable stroller frame and a stroller that can be folded to a smaller size.

In one aspect of the present disclosure, there is provided a portable stroller frame comprising:

the front leg rod and the two front wheel sets are arranged at the lower end of the front leg rod;

the rear leg rod and the two rear wheel sets are arranged at the lower end of the rear leg rod;

the two first joints are fixedly connected with the rear foot rod and are pivoted with the upper end of the front foot rod;

the rear foot rod comprises a fixed support and two swinging rods, the two ends of the fixed support are fixedly connected with the two first joints respectively, the upper ends of the two swinging rods are rotatably connected with the fixed support, the lower ends of the two swinging rods are connected with the two rear wheel sets respectively, and the two swinging rods can swing relative to the fixed support in the folding process of the portable trolley frame to adjust the distance between the two rear wheel sets.

Furthermore, the front foot bar is U-shaped, the end parts of the two side bars of the front foot bar, which are positioned on the opening side of the U-shaped opening, are respectively pivoted with the two first joints, and the two front wheel sets are fixedly arranged on the cross bar of the front foot bar, which is positioned on the bottom of the U-shaped opening, at intervals.

Further, the two swing rods are respectively pivoted with the fixed support through two pivots, the axes of the two pivots are parallel to each other, the distance between the two rear wheel sets in the folded state of the frame is smaller than the distance between the two front wheel sets, and the distance between the two rear wheel sets in the unfolded state of the frame is larger than the distance between the two front wheel sets.

Further, the two pivots are both perpendicular to the plane of the fixed support.

Further, the portable cart frame further comprises:

the handle lower rod is rotationally connected with the rear foot rod;

the handle upper rod is rotationally connected with the handle lower rod;

two ends of each transmission rod are respectively and rotatably connected with the front foot rod and the handle lower rod;

when the handle upper rod is folded forwards relative to the handle lower rod, the handle lower rod can drive the front foot rod to be folded towards the rear foot rod through the transmission rod.

Furthermore, the handle lower rod is pivoted with the fixed support, a fixed rod is fixedly arranged on the handle lower rod pivoted with the fixed support, and the two transmission rods are rotatably connected with the handle lower rod through the fixed rod.

Further, the back foot bar still includes gangbar and two rear wheel bracing pieces, the one end of gangbar with the hand (hold) lower beam rotates to be connected, the other end with two rear wheel bracing pieces rotate to be connected, two rear wheel bracing pieces are kept away from separately the one end of gangbar respectively with two rear wheel group rotate to be connected the hand (hold) upper beam for when the hand (hold) lower beam is folded forward, the hand (hold) lower beam for the fixed bolster rotates, and drives the gangbar motion, the gangbar can pass through two rear wheel bracing pieces drive the interval of two rear wheel group is dwindled.

Furthermore, in the unfolded state of the frame, the included angle between the two rear wheel supporting rods is 180 degrees, and the linkage rod is perpendicular to the two rear wheel supporting rods; in the folding process of the frame, the included angle of the two rear wheel supporting rods is gradually reduced from 180 degrees.

Furthermore, the length directions of the two swinging rods form acute angles with the axes of the wheel shafts of the two rear wheel sets respectively, and the axes of the wheel shafts of the two rear wheel sets are parallel to the horizontal plane in the unfolded state of the frame.

Further, the handle lower rod comprises a first rod and a second rod, each of the first rod and the second rod comprises a straight rod section and an arc rod section, the straight rod section is parallel to or located on the same straight line with the handle upper rod, the arc rod section is connected with the straight rod section, one end, away from the straight rod section, of each of the arc rod sections of the first rod and the second rod is respectively pivoted on two sides of the linkage rod, and the distance between the ends is smaller than the distance between the ends, adjacent to the straight rod section, of each of the arc rod sections of the first rod and the second rod.

Further, the portable cart frame further comprises:

the lower ends of the two support rods are respectively pivoted with the two first joints, and the upper ends of the two support rods are rotatably connected with the handle upper rod;

the sliding sleeve is rotatably arranged on at least one of the two supporting rods;

one end of the seat fixing rod is pivoted on the handle lower rod, and the other end of the seat fixing rod penetrates through the sliding sleeve and extends out of the front side of the frame;

the seat fixing rod can slide along the sliding sleeve along with the relative movement of the two supporting rods and the handlebar lower rod.

In one aspect of the present disclosure, there is provided a stroller including: the portable cart frame is provided.

Therefore, according to the embodiment of the present disclosure, the fixing bracket and the two swing rods rotatably connected to the fixing bracket and respectively connected to the two rear wheel sets are disposed on the rear foot rod, so that the two swing rods can swing relative to the fixing bracket to adjust the distance between the two rear wheel sets. Therefore, when the portable trolley frame is folded by a user, the distance between the two rear wheel sets can be reduced, so that the portable trolley frame can be folded into a smaller size, and the user can be facilitated to a greater extent.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description, serve to explain the principles of the disclosure.

The present disclosure may be more clearly understood from the following detailed description, taken with reference to the accompanying drawings, in which:

fig. 1 and 2 are schematic structural views from a lateral perspective and a perspective, respectively, of some embodiments of a portable cart frame according to the present disclosure in a frame-deployed state;

FIGS. 3-5 are schematic structural views of a side perspective view, a front side perspective view and a rear side perspective view of a portable stroller frame according to some embodiments of the present disclosure during folding of the frame, respectively;

FIGS. 6-8 are schematic structural views of a side perspective view, a perspective view and a forward perspective view of some embodiments of a portable stroller frame according to the present disclosure in a frame folded state

It should be understood that the dimensions of the various parts shown in the figures are not drawn to scale. Further, the same or similar reference numerals denote the same or similar components.

Detailed Description

Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. The description of the exemplary embodiments is merely illustrative and is in no way intended to limit the disclosure, its application, or uses. The present disclosure may be embodied in many different forms and is not limited to the embodiments described herein. These embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. It should be noted that: the relative arrangement of parts and steps, the composition of materials, numerical expressions and numerical values set forth in these embodiments are to be construed as merely illustrative, and not as limitative, unless specifically stated otherwise.

The use of "first," "second," and similar terms in this disclosure is not intended to indicate any order, quantity, or importance, but rather are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element preceding the word covers the element listed after the word, and does not exclude the possibility that other elements are also covered. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.

In the present disclosure, when a specific device is described as being located between a first device and a second device, there may or may not be intervening devices between the specific device and the first device or the second device. When a particular device is described as being coupled to other devices, that particular device may be directly coupled to the other devices without intervening devices or may be directly coupled to the other devices with intervening devices.

All terms (including technical or scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs unless specifically defined otherwise. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.

As shown in fig. 1 and 2, there are schematic structural views from a lateral perspective and a perspective, respectively, of some embodiments of a portable stroller frame according to the present disclosure in a frame-deployed state. Referring to fig. 1 and 2, in conjunction with the schematic structural illustrations of the frame folding process and frame folding state shown in fig. 3-8, in some embodiments, a portable stroller frame comprises: the front leg rod 1, two front wheel sets 2, a back leg rod 3, two back wheel sets 4 and two first joints 9. Two front wheel sets 2 are arranged at the lower end of the front foot rod 1. Two rear wheel sets 4 are arranged at the lower end of the rear foot bar 3. The two front wheel sets 2 and the two rear wheel sets 4 can form a stable ground support structure in the unfolded state of the frame. The "front" and "rear" herein refer to the front side and the rear side based on the body of the user when the user pushes the portable cart frame in the unfolded state. The lower part is the side of the portable cart frame, which is supported at the bottom and takes the portable cart frame as the reference in the frame unfolding state, and the upper part is the side of the portable cart frame, which is far away from the bottom and takes the portable cart frame as the reference in the frame unfolding state.

Referring to fig. 2 and 4, in some embodiments, the front foot bar 1 is U-shaped, the ends of two side bars 1a of the front foot bar 1 on the side of the U-shaped opening (i.e. the upper ends of the front foot bar 1) are respectively pivoted with the two first joints 9 (refer to the pivot points 26 in fig. 1), and the two front wheel sets 2 are fixedly arranged on a cross bar 1b of the front foot bar 1 on the bottom of the U-shape. The cross bar 1b of the front foot bar 1 at the bottom of the U-shape can also be used as a foot support for a baby riding in a baby carriage.

Referring to fig. 1-5, in some embodiments, two first joints 9 are fixedly connected to the hindfoot bar 3. In fig. 5, the back foot lever 3 includes a fixed bracket 3b and two swing levers 3 a. Two ends of the fixed support 3b are respectively fixedly connected with the two first joints 9, the upper ends of the two swing rods 3a are respectively rotatably connected with the fixed support 3b (refer to a pivot 33 in fig. 5), and the lower ends are respectively connected with the two rear wheel sets 4. The two swinging rods 3a can swing relative to the fixed support 3b during the folding process of the portable cart frame so as to adjust the distance between the two rear wheel sets 4.

This embodiment sets up the fixed bolster through the back foot pole and rotates two swing levers be connected and be connected with two rear wheel group respectively with the fixed bolster for two swing levers can be for the fixed bolster swing, with the interval of two rear wheel group of adjustment. Therefore, when the portable trolley frame is folded by a user, the distance between the two rear wheel sets can be reduced, so that the portable trolley frame can be folded into a smaller size, and the user can be facilitated to a greater extent.

Referring to fig. 5, in some embodiments, the fixing bracket 3b has a U-shape as a whole, and the ends of the two side bars on the opening side of the U-shape are fixedly connected with the two first joints 9, and in other embodiments, the two side bars may be integrally connected with the two first joints 9, respectively. The U-shaped bottom cross bar is pivotally connected to the two swing levers 3a by two pivots 33, respectively. The two pivots 33 are located at different positions of the bottom rail, the axes of the two pivots 33 being parallel to each other. Thus, the two swinging rods 3a can change the included angle between the two swinging rods in one plane, so that the distance between the two rear wheel sets 4 at the bottom ends of the two swinging rods 3a can be adjusted.

In some embodiments, the two pivots 33 may be perpendicular to the plane in which the fixed support 3b is integral. Therefore, the two swinging rods 3a can swing in the plane of the whole fixed support 3b, so that the distance between the two rear wheel sets can be adjusted on one hand, and the whole size in the vertical direction of the plane of the fixed support is prevented from being increased after being folded, and the folding size is reduced as much as possible.

Referring to fig. 2 and 8, in some embodiments, the distance between the two rear wheel sets 4 in the frame folded state is preferably smaller than the distance between the two front wheel sets 2, so that the two rear wheel sets 4 can be located between the two front wheel sets 2 in the frame folded state, thereby avoiding interference with other components of the frame while reducing the folded size. In some embodiments, the distance between the two rear wheel sets 4 in the frame unfolding state is preferably larger than the distance between the two front wheel sets 2, so that the maximum width of the two rear wheel sets 4 in the frame unfolding state is larger than the maximum width of the two front wheel sets 2, so as to obtain a more stable supporting effect.

Referring to fig. 1 and 2, in some embodiments, the portable cart frame further comprises: a handle lower rod 6, a handle upper rod 5 and two transmission rods 10. The handle lower rod 6 is rotatably connected to the rear foot rod 3, and the handle upper rod 5 is rotatably connected to the handle lower rod 6 (see the pivot point 21 in fig. 1). Both ends of each of the two transmission rods 10 are respectively connected to the front foot bar 1 and the handlebar lower bar 6 in a rotatable manner (see the pivot point 25 in fig. 1 and the pivot point 30 in fig. 3). When the handle upper lever 5 is folded forward relative to the handle lower lever 6, the handle lower lever 6 can drive the front foot bar 1 to fold toward the rear foot bar 3 via the drive lever 10.

In fig. 3, the handle lower bar 6 is pivotally connected to the fixing bracket 3b (refer to a pivot point 29 in fig. 1), a fixing rod 15 is further fixedly disposed at a portion of the handle lower bar 6 pivotally connected to the fixing bracket 3b, and the two transmission rods 10 are rotatably connected to the handle lower bar 6 through the fixing rod 15. Referring to fig. 1 and 2, in the unfolded state of the frame, the two driving levers 10 and the fixing lever 15 are preferably located on the same plane.

Referring to fig. 1-5, in some embodiments, the portable cart frame further comprises: two support rods 7, a sliding sleeve 13 and a seat fixing rod 8. The lower ends of the two support rods 7 are respectively pivoted with the two first joints 9 (refer to a pivot point 27 in fig. 1), and the upper ends of the two support rods 7 are rotatably connected with the handle upper rod 5 (refer to a pivot point 22 in fig. 1). A sliding sleeve 13 is rotatably provided on at least one of the two support bars 7. One end of the seat fixing rod 8 is pivoted on the handle lower rod 6, and the other end of the seat fixing rod passes through the sliding sleeve 13 and extends out of the front side of the frame. The seat fixing rod 8 can slide along the sliding sleeve 13 along with the relative movement of the two support rods 7 and the handle lower rod 6. Through the guiding and limiting effects of the sliding sleeve 13, the seat fixing rod 8 can reduce the included angle between the seat fixing rod and the supporting rod 7 and the handle lower rod 6 in the process of folding the frame, and the seat fixing rod 8 is prevented from protruding outwards or needing to be manually folded after the frame is folded.

Referring to fig. 5 and 8, in some embodiments, the rear foot bar 3 further includes a linkage bar 11 and two rear wheel support bars 14, wherein one end of the linkage bar 11 is rotatably connected to the handle lower bar 6 (see the pivot point 24 in fig. 1), and the other end is rotatably connected to the two rear wheel support bars 14 (see the pivot point 32 in fig. 1). One end of each of the two rear wheel support rods 14, which is far away from the linkage rod 11, is rotatably connected with the two rear wheel sets 4. When the handle upper rod 5 is folded forwards relative to the handle lower rod 6, the handle lower rod 6 rotates relative to the fixed support 3b and drives the linkage rod 11 to move, and the linkage rod 11 can drive the distance between the two rear wheel sets 4 to be reduced through the two rear wheel support rods 14.

Under the frame development condition, the contained angle of two rear wheel bracing pieces 14 is 180 degrees, just the gangbar 11 with two rear wheel bracing pieces 14 are perpendicular to obtain more stable supporting role under the frame development condition. During the folding process of the frame, the included angle of the two rear wheel supporting rods 14 is gradually reduced from 180 degrees. As can be seen by comparing fig. 5 and 8, as the frame is folded, the angle between the two rear wheel support rods 14 gradually decreases, so that the two rear wheel sets 4 approach each other.

Referring to fig. 2, 4 and 5, in some embodiments, the handlebar lower stem 6 includes a first stem 6a and a second stem 6 b. Each of the first lever 6a and the second lever 6b includes a straight lever section and an arc lever section 12, the straight lever section is parallel to or located on the same straight line with the handle upper lever 5, the arc lever section 12 is connected with the straight lever section, one end of the arc lever section 12 of each of the first lever 6a and the second lever 6b, which is far away from the straight lever section, is respectively pivoted on both sides of the linkage rod 11, and the distance is smaller than the distance between one end of the arc lever section 12 of each of the first lever 6a and the second lever 6b, which is close to the straight lever section. The handle lower bar 6 can be connected in rotation to a linkage bar 11 between two rear wheel support bars 14 of the rear foot bar 3 by means of an arc bar section 12.

Referring to fig. 5, 7 and 8, in some embodiments, the length directions of the two swing levers 3a are respectively at an acute angle with the axes of the axles of the two rear wheel sets 4, and the axes of the axles of the two rear wheel sets 4 are both parallel to the horizontal plane in the frame unfolded state. Therefore, on one hand, the portable cart frame in the frame unfolding state can stably run on the ground, and on the other hand, the wheel shafts of the two rear wheel sets 4 of the portable cart frame in the frame folding state can form an included angle along with the opposite swinging of the two swinging rods 3a, so that the size of the two rear wheel sets 4 in the direction parallel to the straight rod section of the handlebar lower rod can be further reduced.

The various embodiments of the portable stroller frame described above of the present disclosure can be applied to various types of strollers, such as luggage strollers or strollers. The portable cart frame is folded into a smaller size, is convenient to store, and is placed on a luggage rack of a public carrier such as an airplane and the like during traveling, so that the consignment procedure is omitted, and great convenience is brought to users. Accordingly, the present disclosure also provides a stroller including any of the embodiments of the portable stroller frame described above.

The operation of the embodiment of the portable cart frame of the present disclosure will be described with reference to fig. 1 to 8.

The handle lower rod 6 is supported on the rear foot rod 3 and is pivoted with the linkage rod 11. The two ends of the support rod 7 are respectively pivoted with the handle upper rod 5 and a first joint 9 fixedly connected with the rear foot rod 3. A seat fixing rod 8 is arranged between the handle lower rod 6 and the supporting rod 7, one end of the seat fixing rod 8 is pivoted with the handle lower rod 6, and the other end of the seat fixing rod passes through a sliding sleeve 13 which is rotatably arranged on the supporting rod 7. A fixed rod 15 and a transmission rod 10 are further arranged between the front foot rod 1 and the handle lower rod 6, the fixed rod 15 is fixedly connected with the handle lower rod 6, one end of the transmission rod 10 is rotatably connected with the front foot rod 1, and the other end of the transmission rod is rotatably connected with the fixed rod 15. Two swinging rods 3a in the rear foot rods 3 are pivoted with the fixed support 3b and are respectively connected with the two rear wheel sets 4. Two rear wheel support rods 14 are arranged between the two rear wheel sets 4 and the linkage rod 11 respectively.

In the unfolded state of the frame shown in fig. 1 and 2, the upper handle bar 5 and the lower handle bar 6 are unfolded on the same straight line, the transmission rod 10 and the fixed rod 14 are unfolded on the same plane, and the two rear wheel support rods 14 are positioned on the same straight line and are perpendicular to the linkage rod 11. At this time, the two rear wheelsets 2 are positioned outside the two front wheelsets 4 in the left-right direction, and are in an outstretched state.

When the bicycle frame needs to be folded, a user can push the handle upper rod 5 forwards after unlocking the locking structure between the handle upper rod 5 and the handle lower rod 6, so that the handle upper rod 5 rotates forwards to reduce the included angle between the handle upper rod 5 and the handle lower rod 6. Referring to fig. 3-5, the handle lower bar 6 is correspondingly rotated toward the rear leg bar 3, so as to reduce the angle between the handle lower bar 6 and the rear leg bar 3. And with the rotation of the handle lower rod 6, the fixing rod 15 drives the transmission rod 10 to rotate, and the plane of the fixing rod 15 forms an included angle with the plane of the transmission rod 10.

Referring to fig. 3, during the folding process, the pivot point 24 between the linkage rod 11 and the lower end of the handle lower rod 6 rotates clockwise around the pivot point 29, so that the linkage rod 11 is driven to move towards the side adjacent to the first joint 9, and the linkage rod 11 drives the two rear wheel support rods 14 connected with the linkage rod 11 to move, so that the included angle between the two rear wheel support rods 14 is reduced. And the reduction of the included angle between the two rear wheel supporting rods 14 enables the two rear wheel sets 4 to be close to each other and drives the two swinging rods 3a to swing oppositely. In the process that the two rear wheel sets 4 are close to each other, the direction of the wheel axle of the two rear wheel sets is changed along with the opposite swinging of the two swinging rods 3 a.

At this time, the transmission rod 10 simultaneously drives the front leg rod 1 to rotate toward the rear leg rod 3, so that the front leg rod 1, the handle lower rod 6 and the support rod 7 all rotate toward the rear leg rod 3, and a folded shape with a reduced size is formed in a direction perpendicular to the rear leg rod 3. At this time, the seat fixing lever 8 rotates relative to the handle lower lever 6 and slides relative to the slide sleeve 13 as the position of the support lever 7 changes between the handle lower levers 6.

Folding continues on the basis of fig. 3-5 until the frame is folded as shown in fig. 6-8. At this time, the two swing levers 14 in the rear foot bar 3 have been folded into the space formed between the two front wheel sets 2, and the pitch of the two rear wheel sets 4 is smaller than the pitch of the two front wheel sets 2.

Thus, various embodiments of the present disclosure have been described in detail. Some details that are well known in the art have not been described in order to avoid obscuring the concepts of the present disclosure. It will be fully apparent to those skilled in the art from the foregoing description how to practice the presently disclosed embodiments.

Although some specific embodiments of the present disclosure have been described in detail by way of example, it should be understood by those skilled in the art that the foregoing examples are for purposes of illustration only and are not intended to limit the scope of the present disclosure. It will be understood by those skilled in the art that various changes may be made in the above embodiments or equivalents may be substituted for elements thereof without departing from the scope and spirit of the present disclosure. The scope of the present disclosure is defined by the appended claims.

Claims (12)

1. A portable cart frame, comprising:

the front leg rod (1) and two front wheel sets (2) arranged at the lower end of the front leg rod (1);

a rear foot rod (3) and two rear wheel sets (4) arranged at the lower end of the rear foot rod (3);

the two first joints (9) are fixedly connected with the rear foot rod (3), and the two first joints (9) are pivoted with the upper end of the front foot rod (1);

wherein, back foot bar (3) include fixed bolster (3b) and two swinging arms (3a), the both ends of fixed bolster (3b) respectively with two first joints (9) fixed connection, the upper end of two swinging arms (3a) all with fixed bolster (3b) rotate to be connected, the lower extreme respectively with two rear wheel group (4) are connected, two swinging arms (3a) can portable shallow frame folding in-process relative to fixed bolster (3b) swing, in order to adjust the interval of two rear wheel group (4).

2. The portable stroller frame according to claim 1, wherein the front foot bar (1) is U-shaped, the ends of two side bars (1a) of the front foot bar (1) on the side of the U-shaped opening are respectively pivoted with the two first joints (9), and the two front wheel sets (2) are fixedly arranged on a cross bar (1b) of the front foot bar (1) on the bottom of the U-shaped opening at a certain interval.

3. Portable stroller frame according to claim 2, characterized in that the two swing levers (3a) are respectively pivoted to the fixed support (3b) by means of two pivots (33), and the axes of the two pivots (33) are parallel to each other, the distance between the two rear wheel sets (4) in the folded state of the frame being smaller than the distance between the two front wheel sets (2), and the distance between the two rear wheel sets in the unfolded state of the frame being larger than the distance between the two front wheel sets (2).

4. Portable stroller frame according to claim 3, characterized in that both said two pivots (33) are perpendicular to the plane of said fixed support (3 b).

5. The portable cart frame of claim 1, further comprising:

the handle lower rod (6) is rotationally connected with the rear foot rod (3);

the handle upper rod (5) is rotationally connected with the handle lower rod (6);

two ends of each transmission rod (10) are respectively connected with the front foot rod (1) and the handle lower rod (6) in a rotating mode;

when the handle upper rod (5) is folded forwards relative to the handle lower rod (6), the handle lower rod (6) can drive the front foot rod (1) to be folded towards the rear foot rod (3) through the transmission rod (10).

6. The frame of portable stroller according to claim 5, wherein the handle lower bar (6) is pivotally connected to the fixed bracket (3b), and a fixed bar (15) is further fixed to the portion of the handle lower bar (6) pivotally connected to the fixed bracket (3b), and the two transmission bars (10) are rotatably connected to the handle lower bar (6) through the fixed bar (15).

7. The portable cart frame according to claim 5, wherein the rear foot bar (3) further comprises a linkage bar (11) and two rear wheel support bars (14), one end of the linkage bar (11) is rotatably connected to the handle lower bar (6), the other end of the linkage bar is rotatably connected to the two rear wheel support bars (14), one end of each of the two rear wheel support bars (14) far away from the linkage bar (11) is rotatably connected to the two rear wheel sets (4) respectively, when the handle upper bar (5) is folded forward relative to the handle lower bar (6), the handle lower bar (6) is rotated relative to the fixed bracket (3b) and drives the linkage bar (11) to move, and the linkage bar (11) can drive the distance between the two rear wheel sets (4) to be reduced through the two rear wheel support bars (14).

8. The portable cart frame of claim 7, wherein in the unfolded state of the frame, the included angle of the two rear wheel support rods (14) is 180 degrees, and the linkage rod (11) is perpendicular to the two rear wheel support rods (14); in the folding process of the frame, the included angle of the two rear wheel supporting rods (14) is gradually reduced from 180 degrees.

9. Portable stroller frame according to claim 7, characterized in that the length direction of the two swing levers (3a) is at an acute angle to the axis of the axles of the two rear wheel sets (4), respectively, and in the unfolded frame state the axes of the axles of the two rear wheel sets (4) are parallel to the horizontal plane.

10. The portable cart frame of claim 7, wherein said lower handle bar (6) comprises a first bar (6a) and a second bar (6b), each of said first bar (6a) and said second bar (6b) comprising a straight bar section parallel to or collinear with said upper handle bar (5), and an arc bar section (12) connected to said straight bar section, wherein an end of said arc bar section (12) of each of said first bar (6a) and said second bar (6b) distal from said straight bar section is pivotally connected to both sides of said linkage bar (11), respectively, at a distance less than an end of said arc bar section (12) of each of said first bar (6a) and said second bar (6b) proximal to said straight bar section.

11. The portable cart frame of claim 5, further comprising:

the lower ends of the two support rods (7) are respectively pivoted with the two first joints (9), and the upper ends of the two support rods are rotatably connected with the handle upper rod (5);

a sliding sleeve (13) rotatably arranged on at least one of the two support rods (7);

a seat fixing rod (8), one end of which is pivoted on the handle lower rod (6), and the other end of which passes through the sliding sleeve (13) and extends out of the front side of the frame;

the seat fixing rod (8) can slide along the sliding sleeve (13) along with the relative movement of the two supporting rods (7) and the handle lower rod (6).

12. A stroller, comprising:

a portable cart frame according to any of claims 1 to 11.

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