CN220701180U - Frame and baby carrier comprising same - Google Patents

Abstract

The utility model discloses a frame and a baby carrier with the frame, wherein the frame comprises a wheel frame, a front universal wheel, a rear universal wheel, a front wheel positioning mechanism, a rear wheel positioning mechanism, a handle frame and a reversing control mechanism. The front universal wheel is arranged on the wheel frame, the rear universal wheel is arranged on the wheel frame, the front wheel positioning mechanism is arranged on the wheel frame and can position the front universal wheel, the rear wheel positioning mechanism is arranged on the wheel frame and can position the rear universal wheel, and the handle frame is rotatably arranged on the wheel frame and can switch the front side position and the rear side position. The reversing control mechanism comprises a control piece, a driving piece, a front linkage piece and a rear linkage piece, wherein the control piece is movably arranged on the wheel frame and provided with a front wheel positioning position and a rear wheel positioning position; the driving piece is arranged on the handle frame, and when the handle frame rotates to switch positions, the driving piece can drive the control piece to switch the front wheel positioning position and the rear wheel positioning position. The frame and the baby carrier comprising the same are simple in structure.

Description

Frame and stroller containing the same

Technical field

The utility model relates to daily necessities, in particular to a bicycle frame and a stroller containing the same.

Background technique

There are some existing stroller frames, the front and rear wheels of which are universal wheel structures. The handle frame can switch the front and rear positions. When the handle frame switches the position, one of the front wheel and the rear wheel is moved through the reversing control mechanism. One direction is positioned while the other maintains universal rotation, so that the direction of use of the stroller can be switched. In an existing stroller of the above type, the reversing control mechanism includes a trigger member and a spring corresponding to the front wheel and the rear wheel respectively. The two trigger members are independently connected to the positioning mechanisms of the front wheel and the rear wheel through a linkage member. The spring is used to provide Resetting force. When the handle frame rotates, it will touch one of the trigger parts and release the other trigger part. The touched trigger part will position the traveling direction of the universal wheel through linkage with the corresponding positioning mechanism, and the other trigger part will maintain its position through a spring. , so that the other universal wheel will not be positioned and maintain universal rotation. The above-mentioned stroller frame requires two sets of triggers and springs, has a large number of parts, has a complicated structure, and is troublesome to assemble.

Utility model content

The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes a vehicle frame with a simple structure of the reversing control mechanism.

The utility model also provides a baby carriage having the above-mentioned frame.

According to the frame of the first embodiment of the utility model, it includes: a wheel frame; a front universal wheel, which is arranged on the wheel frame; a rear universal wheel, which is arranged on the wheel frame; a front wheel positioning mechanism, which is arranged on the wheel frame and can position the front universal wheel for forward and backward movement; a rear wheel positioning mechanism, which is arranged on the wheel frame and can position the rear universal wheel for forward and backward movement; a handle frame, which is rotatably arranged on the wheel frame and can switch between a front position and a rear position, and in the rear position, the handle frame corresponds to the rear universal wheel up and down; in the front position, the handle frame corresponds to the front universal wheel up and down; a reversing control mechanism, including a control member, a driving member, a front linkage member and a rear linkage member, the control member is movably arranged on the wheel frame and has a front wheel positioning position and a rear wheel positioning position, and the control member is The front linkage and the rear linkage are connected to the front wheel alignment mechanism and the rear wheel alignment mechanism respectively; in the front wheel alignment position, the control member enables the front wheel alignment mechanism to locate the travel direction of the front universal wheel through the front linkage, and enables the rear wheel alignment mechanism not to locate the travel direction of the rear universal wheel through the rear linkage; in the rear wheel alignment position, the control member enables the rear wheel alignment mechanism to locate the travel direction of the rear universal wheel through the rear linkage, and enables the front wheel alignment mechanism not to locate the travel direction of the front universal wheel through the front linkage; the driving member is arranged on the handle frame, and when the handle frame rotates to switch positions, the driving member can drive the control member to switch between the front wheel alignment position and the rear wheel alignment position.

The vehicle frame according to the embodiment of the present invention at least has the following beneficial effects: when the above-mentioned vehicle frame is used in reverse direction, the handle frame is rotated to be in the front position or the rear position. When the handle frame is rotated, the driving member can be used to rotate the handle frame. The driving control part switches positions, and the control part controls the positioning state of the front wheel positioning mechanism and the rear wheel positioning mechanism through the front linkage part and the rear linkage part, so that one of the front universal wheel and the rear universal wheel maintains universal movement. The other becomes directional travel, thereby completing the function of reversing the use of the frame. The above-mentioned frame realizes the control of the front wheel positioning mechanism and the rear wheel positioning mechanism through the position change of a single control part, reducing the number of parts, thus simplifying the structure and facilitating product assembly.

According to some embodiments of the present invention, the wheel frame is provided with a wheel frame joint, the wheel frame joint is provided with a limited position accommodation cavity, the control member is movably provided in the limit accommodation cavity, and the handle frame A handle joint is provided, the handle joint is hinged to the wheel frame joint, the control part is an annular body, the driving part is an eccentric block provided on the handle joint, and the driving part is inserted into the control part inner hole.

According to some embodiments of the utility model, the inner side wall of the position limiting accommodating cavity is an arc surface, the control member is a circular ring and its diameter is smaller than the diameter of the position limiting accommodating cavity, one end of the driving member is provided with an arc surface, and the driving member cooperates with the inner hole wall of the control member through the arc surface at one end thereof.

According to some embodiments of the utility model, the front wheel positioning mechanism includes a front latch and a front elastic member, the front universal wheel includes a front wheel body and a front wheel connecting frame, the front wheel body is rotatably arranged on the front wheel connecting frame, the front wheel connecting frame is rotatably arranged on the wheel frame and enables the front wheel body to rotate universally, the front wheel connecting frame is provided with a front pin hole for cooperating with the front latch, the front latch is telescopically movably arranged on the wheel frame, the front elastic member is arranged between the front latch and the wheel frame, and the front elastic member is used to make the front latch have a tendency to elastically extend; when the front latch is extended and cooperates with the front pin hole, the position of the front wheel connecting frame relative to the wheel frame is fixed; the front latch is connected to the control member through the front linkage member; when the control member is in the rear wheel positioning position, the control member pulls the front latch through the front linkage member to keep it in a retracted state; when the control member is in the front wheel positioning position, the control member relaxes the front latch through the front linkage member so that the front latch can elastically extend and insert into the front pin hole.

According to some embodiments of the utility model, the rear wheel positioning mechanism includes a rear bayonet and a rear elastic member, the rear universal wheel includes a rear wheel body and a rear wheel connecting frame, the rear wheel body is rotatably arranged on the rear wheel connecting frame, the rear wheel connecting frame is rotatably arranged on the wheel frame and enables the rear wheel body to rotate universally, the rear wheel connecting frame is provided with a rear pin hole for cooperating with the rear bayonet, the rear bayonet is telescopically movably arranged on the wheel frame, the rear elastic member is arranged between the rear bayonet and the wheel frame, and the rear elastic member is used to make the rear bayonet have a tendency to elastically extend; when the rear bayonet extends and cooperates with the rear pin hole, the position of the rear wheel connecting frame relative to the wheel frame is fixed; the rear bayonet is connected to the control member through the rear linkage member; when the control member is in the front wheel positioning position, the control member pulls the rear bayonet through the rear linkage member to keep it in a retracted state; when the control member is in the rear wheel positioning position, the control member relaxes the rear bayonet through the rear linkage member so that the rear bayonet can elastically extend and insert into the rear pin hole.

According to some embodiments of the present invention, when the handle frame is in the rear position, the control member is in the rear wheel positioning position; when the handle frame is in the front position, the control member is in the the front wheel positioning position.

According to some embodiments of the utility model, two front universal wheels are provided, two rear universal wheels are provided, and two groups of reversing control mechanisms are provided accordingly, and each group of reversing control mechanisms controls one front universal wheel and one rear universal wheel.

The baby carriage according to the second embodiment of the utility model comprises the frame of the first embodiment of the utility model.

The stroller according to the embodiment of the present invention has at least the following beneficial effects: due to the use of the frame of the first embodiment of the present utility model, the reversing control mechanism of the stroller has the advantage of being simple in structure.

Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Description of drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments in conjunction with the following drawings, in which:

Figure 1 is a schematic structural diagram of the vehicle frame according to the embodiment of the present invention, with the handlebar frame in the rear position, the traveling direction of the rear universal wheels being locked, and the front universal wheels maintaining universal rotation;

Figure 2 is an exploded schematic diagram of the structure shown in Figure 1;

Figure 3 is an enlarged schematic diagram of point A in Figure 2;

Figure 4 is an enlarged schematic diagram of B in Figure 2;

FIG5 is an enlarged schematic diagram of point C in FIG2;

FIG6 is an enlarged schematic diagram of point D in FIG2 ;

Figure 7 is a structural schematic diagram of the vehicle frame according to the embodiment of the present invention, with the handlebar frame in the front position, the traveling direction of the front universal wheels being locked, and the rear universal wheels maintaining universal rotation.

Reference signs:

Wheel frame 100, wheel frame joint 110, limit accommodating cavity 111;

Front universal wheel 200, front wheel body 210, front wheel connecting frame 220, front pin hole 221;

Rear universal wheel 300, rear wheel body 310, rear wheel connecting frame 320, rear pin hole 321;

Front wheel positioning mechanism 400, front bayonet 410, front elastic member 420;

Rear wheel positioning mechanism 500, rear bayonet 510, rear elastic member 520;

Handle frame 600, handle joint 610;

The reversing control mechanism 700, the control part 710, the driving part 720, the front linkage part 730, and the rear linkage part 740.

Detailed ways

The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the drawings, in which the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present invention and cannot be understood as limitations of the present invention.

In the description of the present invention, it should be understood that the orientation descriptions involved, such as the orientation or positional relationships indicated by up, down, front, back, left, right, etc. are based on the orientation or positional relationships shown in the drawings, and only It is intended to facilitate the description of the present invention and simplify the description, but does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention.

In the description of the present invention, several means one or more, plural means two or more, greater than, less than, more than, etc. are understood as excluding the original number, and above, below, within, etc. are understood as including the original number. If there is a description of first and second, it is only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the order of indicated technical features. relation.

In the description of the present utility model, unless otherwise explicitly limited, words such as setting, installation, and connection should be understood in a broad sense. Those skilled in the art can reasonably determine the specific meaning of the above words in the present utility model in combination with the specific content of the technical solution. .

Referring to Figures 1 to 7, a vehicle frame includes: a wheel frame 100, a front universal wheel 200, a rear universal wheel 300, a front wheel positioning mechanism 400, a rear wheel positioning mechanism 500, a handle frame 600 and a reversing control. Establishment 700. The front universal wheel 200 and the rear universal wheel 300 are provided on the wheel frame 100 . The front wheel positioning mechanism 400 is disposed on the wheel frame 100 and can position the front universal wheel 200 to travel forward and backward (the traveling direction is limited to the front and rear direction). The rear wheel positioning mechanism 500 is disposed on the wheel frame 100 and can position the rear universal wheel 300 It travels forward and backward (the direction of travel is limited to the front and back direction). The handle frame 600 is rotatably installed on the wheel frame 100 and can switch the front position and the rear position. In the rear position, the handle frame 600 corresponds to the rear universal wheel 300 up and down; in the front position, the handle frame 600 corresponds to the front universal wheel. 200 corresponds to up and down. The reversing control mechanism 700 includes a control part 710, a driving part 720, a front linkage part 730 and a rear linkage part 740. The control part 710 is movably provided on the wheel frame 100 and has a front wheel positioning position and a rear wheel positioning position. The control part 710 passes through the front wheel. The linkage piece 730 and the rear linkage piece 740 are respectively connected to the front wheel positioning mechanism 400 and the rear wheel positioning mechanism 500; in the front wheel positioning position, the control piece 710 causes the front wheel positioning mechanism 400 to position the front universal wheel 200 through the front linkage piece 730. direction of travel, and the rear wheel positioning mechanism 500 does not position the traveling direction of the rear universal wheel 300 through the rear linkage part 740; in the rear wheel positioning position, the control part 710 causes the rear wheel positioning mechanism 500 to position the rear universal wheel through the rear linkage part 740. The traveling direction of the wheel 300, and the front linkage 730 is used to prevent the front wheel positioning mechanism 400 from positioning the traveling direction of the front universal wheel 200; the driving member 720 is provided on the handle frame 600, and when the handle frame 600 rotates to switch positions, the driving member 720 can 720 The drive control 710 switches the front wheel alignment position and the rear wheel alignment position.

When the above-mentioned vehicle frame is used in reverse direction, the handle frame 600 is rotated to be in the front position or the rear position. When the handle frame 600 is rotated, the driving member 720 can be used to drive the control member 710 to switch positions, and the control member 710 is linked through the front The component 730 and the rear linkage component 740 are used to control the positioning state of the front wheel positioning mechanism 400 and the rear wheel positioning mechanism 500, so that one of the front universal wheel 200 and the rear universal wheel 300 maintains universal movement while the other becomes directional. travel, thereby completing the reversing function of the frame. The above-mentioned frame realizes control of the front wheel positioning mechanism 400 and the rear wheel positioning mechanism 500 by changing the position of a single control part 710, thereby reducing the number of parts, thereby simplifying the structure and facilitating product assembly.

In the embodiment, the wheel frame 100 is provided with a wheel frame joint 110, the wheel frame joint 110 is provided with a limited position accommodation cavity 111, the control member 710 is movably provided in the limit accommodation cavity 111, the handle frame 600 is provided with a handle joint 610, and the handle The joint 610 is hinged to the wheel frame joint 110, the control member 710 is an annular body, the driving member 720 is an eccentric block provided on the handle joint 610, and the driving member 720 is inserted into the inner hole of the control member 710. When the handle frame 600 rotates to switch positions, it can drive the eccentric block to rotate and change the position. The eccentric block pushes the control member 710 at two different positions, so that the control member 710 can be biased to two different positions. The two different positions are Front wheel alignment position and rear wheel alignment position. Using the above structure to drive the control part 710 has a simple structure and is easy to implement.

In the embodiment, the driving member 720 and the handle joint 610 are integrally formed to facilitate production and manufacturing; of course, it is conceivable that the driving member 720 can also be manufactured separately from the handle joint 610 and then assembled together. In the embodiment, the driving member 720 is an eccentric block structure, that is, its geometric center is offset from the hinge axis of the handle joint 610 .

In the embodiment, the inner wall of the limit accommodating cavity 111 is an arc surface, the control member 710 is a ring and the diameter is smaller than the diameter of the limit accommodating cavity 111, one end of the driving member 720 is provided with an arc surface, and the driving member 720 is provided with an arc surface. 720 cooperates with the inner hole wall of the control member 710 through the arc surface at one end thereof. With the above structure, the control member 710 moves smoothly when switching positions.

It is conceivable that in other embodiments, the above-mentioned structure is not limited to be used to realize the driving of the control member 710 by the driving member 720. For example, the driving member 720 may be a pressing member, and the control member 710 may be an elastic expansion member. The control member 710 is pressed against the control member 710 to cause it to change its position; it can be understood that in the art, there are many implementation methods for driving one member to change its position through another member, and those skilled in the art can carry out the operation according to the actual situation. set up.

In the embodiment, the front wheel positioning mechanism 400 includes a front bayonet 410 and a front elastic member 420. The front universal wheel 200 includes a front wheel body 210 and a front wheel connecting frame 220. The front wheel body 210 is rotatably mounted on the front wheel connecting frame 220. , the front wheel connecting frame 220 is rotatably arranged on the wheel frame 100 and enables the front wheel body 210 to rotate in all directions. The front wheel connecting frame 220 is provided with a front pin hole 221 for cooperating with the front bayonet 410, and the front bayonet 410 is telescopically movable. The front elastic member 420 is disposed between the front bayonet 410 and the wheel frame 100. The front elastic member 420 is used to make the front bayonet 410 have a tendency to elastically extend; the front bayonet 410 extends and connects with the wheel frame 100. When the front pin hole 221 is matched, the front wheel connecting frame 220 is fixed in position relative to the wheel frame 100, thereby positioning the traveling direction of the front universal wheel 200; the front bayonet 410 is connected to the control member 710 through the front linkage 730; the control member 710 is at the rear. When the control member 710 is in the wheel positioning position, the control member 710 pulls the front bayonet 410 through the front linkage 730 to keep it in the retracted state, so that the front universal wheel 200 can maintain universal rotation; when the control member 710 is in the front wheel positioning position, the control member 710 is in the front wheel positioning position. The member 710 loosens the front bayonet 410 through the front linkage member 730, so that the front bayonet 410 can elastically extend and be inserted into the front pin hole 221, so that the front universal wheel 200 can position the traveling direction.

The rear wheel positioning mechanism 500 includes a rear bayonet 510 and a rear elastic member 520. The rear universal wheel 300 includes a rear wheel body 310 and a rear wheel connecting frame 320. The rear wheel body 310 is rotatably arranged on the rear wheel connecting frame 320. The rear wheel connecting frame 320 is rotatably arranged on the wheel frame 100 and enables the rear wheel body 310 to be universally rotated. The rear wheel connecting frame 320 is provided with a rear pin hole 321 for cooperating with the rear bayonet 510. The rear bayonet 510 is telescopically movably arranged on the wheel frame 100. The rear elastic member 520 is arranged between the rear bayonet 510 and the wheel frame 100. The rear elastic member 520 is used to make the rear bayonet 510 have a tendency to elastically extend; the rear bayonet 510 extends and is aligned with the wheel frame 100. When the rear pin hole 321 is engaged, the rear wheel connecting frame 320 is fixed relative to the wheel frame 100, thereby positioning the travel direction of the rear universal wheel 300; the rear latch 510 is connected to the control member 710 through the rear linkage member 740; when the control member 710 is in the front wheel positioning position, the control member 710 pulls the rear latch 510 through the rear linkage member 740 to keep it in a retracted state, so that the rear universal wheel 300 can maintain universal rotation; when the control member 710 is in the rear wheel positioning position, the control member 710 loosens the rear latch 510 through the rear linkage member 740, so that the rear latch 510 can elastically extend and insert into the rear pin hole 321, so that the rear universal wheel 300 can position the travel direction.

The front wheel positioning mechanism 400 and the rear wheel positioning mechanism 500 use elastically retractable bayonet pins, which are simple in structure and easy to implement. It is conceivable that in other embodiments, the front wheel positioning mechanism 400 and the rear wheel positioning mechanism 500 may also be other structures, such as positioning by friction brake or magnetic attraction, etc., as long as the front universal wheel 200 and the rear universal wheel 300 can be positioned in the corresponding travel direction.

In the embodiment, the front linkage part 730 and the rear linkage part 740 are pull wires. The pull wires can easily realize long-distance linkage and have a simple structure. It is conceivable that the front linkage part 730 and the rear linkage part 740 may also be other structures, such as tie rods and so on.

In the embodiment, when the handle frame 600 is in the rear position, the control member 710 is in the rear wheel positioning position; when the handle frame 600 is in the front position, the control member 710 is in the front wheel position, that is, which side the handle frame 600 is rotated to, The universal wheel on one side locks the direction of travel, while the universal wheel on the other side maintains universal rotation, making it easier to push and use the frame. Of course, for the pulling structure, the above corresponding relationships can be exchanged.

In the embodiment, two front universal wheels 200 are provided, and two rear universal wheels 300 are provided. Two groups of reversing control mechanisms 700 are provided correspondingly. Each group of reversing control mechanisms 700 controls one front universal wheel 200 and one rear universal wheel. Universal wheel 300.

The utility model provides a baby carriage, which includes the above-mentioned carriage frame. Due to the use of the frame of the first embodiment of the present invention, the reversing control mechanism of the stroller has the advantage of simple structure.

The technical features of the above embodiments can be combined in any way. To simplify the description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, all possible combinations should be used. It is considered to be within the scope of this manual.

The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above-mentioned embodiments. Within the scope of knowledge possessed by those of ordinary skill in the technical field, the utility model can also be modified without departing from the purpose of the present utility model. Make various changes below.

Claims (8)

1. A vehicle frame, characterized in that it includes: wheel frame(100); A front universal wheel (200) is provided on the wheel frame (100); The rear universal wheel (300) is provided on the wheel frame (100); A front wheel positioning mechanism (400) is provided on the wheel frame (100) and can position the front universal wheel (200) to travel forward and backward; A rear wheel positioning mechanism (500) is arranged on the wheel frame (100) and can position the rear universal wheel (300) to move forward and backward; A handle frame (600) is rotatably disposed on the wheel frame (100) and can switch between a front position and a rear position. In the rear position, the handle frame (600) corresponds to the rear universal wheel (300) in a vertical direction; in the front position, the handle frame (600) corresponds to the front universal wheel (200) in a vertical direction; A direction-changing control mechanism (700) comprises a control member (710), a driving member (720), a front linkage member (730) and a rear linkage member (740); the control member (710) is movably arranged on the wheel frame (100) and has a front wheel positioning position and a rear wheel positioning position; the control member (710) is connected to the front wheel positioning mechanism (400) and the rear wheel positioning mechanism (500) respectively through the front linkage member (730) and the rear linkage member (740); at the front wheel positioning position, the control member (710) causes the front wheel positioning mechanism (400) to position the traveling direction of the front universal wheel (200) through the front linkage member (730), and controls the front wheel positioning mechanism (400) to position the traveling direction of the front universal wheel (200) through the rear linkage member (740). 40) so that the rear wheel positioning mechanism (500) does not position the travel direction of the rear universal wheel (300); in the rear wheel positioning position, the control member (710) causes the rear wheel positioning mechanism (500) to position the travel direction of the rear universal wheel (300) through the rear linkage member (740), and causes the front wheel positioning mechanism (400) to not position the travel direction of the front universal wheel (200) through the front linkage member (730); the driving member (720) is arranged on the handle frame (600), and when the handle frame (600) is rotated to switch positions, the driving member (720) can drive the control member (710) to switch between the front wheel positioning position and the rear wheel positioning position. 2. The vehicle frame according to claim 1, characterized in that: the wheel frame (100) is provided with a wheel frame joint (110), and the wheel frame joint (110) is provided with a limited position accommodation cavity (111), The control part (710) is movably provided in the limit accommodation cavity (111), the handle frame (600) is provided with a handle joint (610), and the handle joint (610) is hinged to the wheel frame joint. (110), the control member (710) is an annular body, the driving member (720) is an eccentric block provided at the handle joint (610), the driving member (720) is inserted into the control member ( 710) inner hole. 3. The frame according to claim 2 is characterized in that: the inner side wall of the position limiting accommodating cavity (111) is an arc surface, the control member (710) is a circular ring and its diameter is smaller than the diameter of the position limiting accommodating cavity (111), one end of the driving member (720) is provided with an arc surface, and the driving member (720) cooperates with the inner hole wall of the control member (710) through the arc surface at one end thereof. 4. The frame according to claim 1, characterized in that: the front wheel positioning mechanism (400) includes a front latch (410) and a front elastic member (420), the front universal wheel (200) includes a front wheel body (210) and a front wheel connecting frame (220), the front wheel body (210) is rotatably arranged on the front wheel connecting frame (220), the front wheel connecting frame (220) is rotatably arranged on the wheel frame (100) and enables the front wheel body (210) to be universally rotatable, the front wheel connecting frame (220) is provided with a front pin hole (221) for cooperating with the front latch (410), the front latch (410) is telescopically movably arranged on the wheel frame (100), the front elastic member (420) is arranged between the front latch (410) and the wheel frame (100), and the front elastic member ( The front locking pin (410) is used to make the front locking pin (410) have a tendency to elastically extend; when the front locking pin (410) extends and cooperates with the front pin hole (221), the position of the front wheel connecting frame (220) is fixed relative to the wheel frame (100); the front locking pin (410) is connected to the control member (710) through the front linkage member (730); when the control member (710) is in the rear wheel positioning position, the control member (710) lifts the front locking pin (410) through the front linkage member (730) to keep it in a retracted state; when the control member (710) is in the front wheel positioning position, the control member (710) loosens the front locking pin (410) through the front linkage member (730) so that the front locking pin (410) can elastically extend and be inserted into the front pin hole (221). 5. The vehicle frame according to claim 4, characterized in that: the rear wheel positioning mechanism (500) includes a rear bayonet (510) and a rear elastic member (520), and the rear universal wheel (300) includes The rear wheel body (310) and the rear wheel connecting frame (320), the rear wheel body (310) is rotatably installed on the rear wheel connecting frame (320), the rear wheel connecting frame (320) is rotatably installed on the wheel frame (100) and enable the rear wheel body (310) to rotate in all directions, the rear wheel connecting frame (320) is provided with a rear pin hole (321) for cooperating with the rear bayonet (510), the The rear bayonet (510) is retractably and movably provided on the wheel frame (100), and the rear elastic member (520) is provided between the rear bayonet (510) and the wheel frame (100). The rear elastic member (520) is used to make the rear bayonet (510) have a tendency to elastically extend; when the rear bayonet (510) extends and cooperates with the rear pin hole (321), the rear bayonet (510) The rear wheel connecting frame (320) is fixed in position relative to the wheel frame (100); the rear bayonet (510) is connected to the control part (710) through the rear linkage part (740); the control part (710) 710) When in the front wheel positioning position, the control member (710) lifts the rear bayonet (510) through the rear linkage member (740) to keep it in the retracted state; the control member (710) 710) When the rear wheel is in the position of positioning, the control member (710) loosens the rear bayonet (510) through the rear linkage (740), so that the rear bayonet (510) can elastically extend and Insert the rear pin hole (321). 6. The vehicle frame according to claim 1 or 5, characterized in that: when the handle frame (600) is in the rear position, the control member (710) is in the rear wheel positioning position; The handle frame (600) is in the front position, and the control member (710) is in the front wheel positioning position. 7. The frame according to claim 1 is characterized in that: two front universal wheels (200) are provided, two rear universal wheels (300) are provided, and two groups of reversing control mechanisms (700) are provided accordingly, and each group of reversing control mechanisms (700) controls one front universal wheel (200) and one rear universal wheel (300). 8. Baby carriage, characterized in that it includes the frame according to any one of claims 1 to 7.