Sliding cart frame and cart

Abstract

The invention discloses a sliding stroller frame and a stroller, the sliding stroller frame comprises a front foot, a rear foot, a handlebar, a base, a sliding seat, a first connecting piece and a second connecting piece, the upper end of the front foot is pivoted to the base through a first pivoting center shaft; the upper end of the rear leg is pivoted to the base through a second pivoting central shaft; the lower end of the handlebar is pivoted to the base through a third pivoting central shaft; two ends of the first connecting piece are respectively pivoted between the front foot and the rear foot; two ends of the second connecting piece are respectively pivoted between the front foot and the rear end of the sliding seat; the sliding seat is arranged on the base in a front-back sliding mode. The carrier does not need to be disassembled during folding, and the carrier can be directly installed on an automobile backseat to serve as a safety seat, use is convenient, and the utilization rate is high.

Description

Technical Field

[0001] The present invention relates to a stroller, in particular to a sliding stroller frame which can be directly installed on a rear seat of a car after being folded and used as a safety seat. Background Art

[0002] Current strollers generally only have a single carrier, and the carrier must be disassembled before the stroller frame can be folded, making use and storage inconvenient and limiting in functionality. Furthermore, with the increasing popularity of cars, existing stroller frames cannot be used directly in the back seat of a car after folding due to the folding method. Consequently, the user must either use a separate car safety seat or disassemble the carrier from the frame, using the carrier in the back seat while storing the frame separately. After exiting the car, the carrier and frame must be reassembled, making use cumbersome and failing to meet user needs. Summary of the Invention

[0003] The present invention aims to provide a sliding stroller frame which can be directly installed on the back seat of a car and used as a safety seat without disassembling the carrier when folding.

[0004] Another object of the present invention is to provide a stroller that can be directly installed on the back seat of a car as a safety seat without disassembling the carrier when folding.

[0005] In order to achieve the above-mentioned purpose, the sliding cart frame provided by the present invention includes a front foot, a rear foot, a rider, a base, a sliding seat, a first connecting member and a second connecting member, the upper end of the front foot is pivotally connected to the base through a first pivot center axis; the upper end of the rear foot is pivotally connected to the base through a second pivot center axis; the lower end of the rider is pivotally connected to the base through a third pivot center axis; the two ends of the first connecting member are respectively pivotally connected between the front foot and the rear foot; the two ends of the second connecting member are respectively pivotally connected between the front foot and the rear end of the sliding seat; the sliding seat is arranged on the base in a forward and backward sliding manner.

[0006] The present invention pivotally connects the front legs, rear legs, and rider to a base, and slides a sliding seat on the base. A first connecting member is provided between the front legs and the rear legs, and a second connecting member is provided between the front legs and the sliding seat. This allows the front legs to swing and fold backward relative to the base, simultaneously driving the rear legs to swing and fold, and at the same time, pushing the sliding seat to move along the rear end of the base. Therefore, the sliding seat can remain horizontal even after the sliding stroller frame is folded, allowing the carrier carried on the sliding seat to be removed from the sliding seat when the sliding stroller frame is folded, greatly improving ease of use. Furthermore, the front legs and rear legs can be folded to the rear and upper portion of the base, so that the folded sliding stroller frame forms a safety seat with a flat bottom that can be installed in the back seat of a car, achieving multiple uses for one vehicle and greatly improving utilization.

[0007] Preferably, the first pivot center axis is located in front of the second pivot center axis.

[0008] Preferably, the height of the first pivot axis relative to the surface of the base is less than the height of the second pivot axis relative to the base. This allows the front legs to rotate about the first pivot axis to the upper rear portion of the base, while the rear legs can rotate about the second pivot axis to the upper portion of the front legs. This ensures that the bottom of the base is flat and unobstructed after the sliding stroller frame is folded, making it easier to place it on the back seat of a car, while also preventing interference between the front and rear legs during folding.

[0009] Specifically, the horizontal height of the second pivot center axis is less than the horizontal height of the third pivot center axis. This can also avoid interference between the rear legs and the rider when folding, ensuring the compact structure of the sliding stroller frame after folding.

[0010] Preferably, the base is provided with a slide groove extending in the front and rear directions, and the sliding seat is slidably arranged in the slide groove. By providing the slide groove, the sliding seat can slide stably and smoothly on the base, thereby improving the smoothness of the sliding cart frame when folding.

[0011] Specifically, two tracks are provided on the base with a gap, and the slide groove is formed between the two tracks. The inner sides of the two tracks are respectively recessed with groove bodies, and the opposite sides of the sliding seat are respectively protruded with bumps, and the bumps are slidably stuck in the groove bodies.

[0012] Preferably, the sliding cart frame further comprises a first locking mechanism disposed between the base and the sliding seat to lock or unlock the latter. The first locking mechanism locks the base and the sliding seat, thereby locking or unlocking the sliding cart frame when the sliding cart frame is fully extended, thereby ensuring safety in use of the sliding cart frame.

[0013] Preferably, the sliding cart frame further includes a second locking mechanism disposed between the handle and the base to lock the handle relative to the base, or release the handle to allow the handle to rotate about the third pivot axis. The second locking mechanism can lock the handle relative to the base when fully extended, ensuring stability when the handle is extended. When folded, the second locking mechanism can release the handle relative to the base, allowing the handle to rotate and fold relative to the base, ensuring a more compact structure when the sliding cart frame is folded.

[0014] Specifically, the second locking mechanism includes a push rod, a driving member and a locking member. The base is provided with a first ear, and the rider is provided with a second ear. The locking member is coaxially arranged between the first ear and the second ear with the third pivot center axis, and the locking member is movably arranged along the extension direction of the third pivot center axis; the push rod is movably arranged in the rider, and one end of the push rod is connected to the driving member to drive the driving member, so that the driving member drives the locking member to be completely stuck in the second ear, thereby releasing the lock between the rider and the base, or stuck between the first ear and the second ear, thereby locking the rider and the base.

[0015] Specifically, the driving member has a driving bevel on its side facing the locking member, and the locking member has a mating bevel on its side facing the driving member. When the driving member moves, the driving bevel and the mating bevel slide against each other to drive the locking member to move. By utilizing the interaction between the driving bevel and the mating bevel, the axial movement of the driving member along the rider's hand is converted into movement of the locking member along the third pivot axis, resulting in a simple structure and very convenient control.

[0016] Specifically, the second locking mechanism further includes a first return member, which is disposed between the second ear and the locking member and provides an elastic force that causes the locking member to be engaged between the first ear and the second ear. The first return member can automatically lock the locking member between the handle and the base. Therefore, when the sliding stroller frame is fully extended, it is automatically locked, eliminating the need for manual operation and improving ease of use.

[0017] Specifically, the second locking mechanism further includes a second restoring member, which is disposed between the first ear and the driving member and provides an elastic force for restoring the driving member.

[0018] Preferably, the sliding cart frame further comprises a telescopic handle, which is telescopically sleeved on the upper end of the rider. The provision of the telescopic handle can make the sliding cart frame more flexible and convenient to use.

[0019] Specifically, the sliding cart frame further includes a third locking mechanism disposed between the telescopic handle and the rider, and configured to lock the telescopic handle to fix the telescopic handle relative to the rider, or release the telescopic handle to extend or retract the telescopic handle relative to the rider. The third locking mechanism allows the telescopic handle to extend or retract into the rider's hand, and locks the rider and the telescopic handle when extended. This ensures a more stable and secure structure for the sliding cart frame when deployed, and a more compact and smaller structure when folded.

[0020] Specifically, the third locking mechanism includes an operating member, a mounting seat, a slider, a sliding shaft, a locking pin and a spring, the rider is provided with a through hole, the telescopic handle is provided with a locking hole, the mounting seat is fixed in the telescopic handle, the slider is slidably arranged in the mounting seat, the mounting seat is provided with an elongated hole perpendicular to the moving direction of the slider, the slider is provided with an inclined guide hole, the sliding shaft is fixed to the locking pin and the sliding shaft passes through the elongated hole and the guide hole, and the spring is arranged between the slider and the telescopic handle; the locking pin extends out of the through hole, and the operating member is connected to the slider to drive the slider when moving, so that the guide hole and the elongated hole work together to drive the locking pin to exit the locking hole, thereby releasing the rider and the telescopic handle, or extending into the locking hole, thereby locking the rider and the telescopic handle.

[0021] A cart comprises a carrier and a sliding cart frame, wherein the carrier is detachably mounted on the sliding seat.

[0022] Preferably, the carrier is a stroller seat, a sleeping basket or a carrying basket. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a perspective structural diagram of the stroller of the present invention when a basket is provided.

[0024] Figure 2 It is a perspective view of the sliding cart frame of the cart of the present invention.

[0025] Figure 3It is a side view of the sliding cart frame of the cart of the present invention.

[0026] Figure 4 It is a cross-sectional view of the sliding cart frame of the cart of the present invention.

[0027] Figure 5 It is a structural diagram of a sliding seat of a sliding cart frame of the cart of the present invention.

[0028] Figure 6 1 is a structural diagram of the second locking mechanism of the sliding cart frame of the present invention.

[0029] Figure 7 1 is an exploded view of the second locking mechanism of the sliding cart frame of the present invention.

[0030] Figure 8 1 is a structural diagram of a locking member of a second locking mechanism of a sliding cart frame of the present invention.

[0031] Figure 9 1 is a structural diagram of the third locking mechanism of the sliding cart frame of the present invention.

[0032] Figure 10 It is an exploded view of the third locking mechanism of the sliding cart frame of the present invention.

[0033] Figure 11 It is a cross-sectional view of the third locking mechanism of the sliding cart frame of the present invention.

[0034] Figure 12 This is a diagram of the stroller of the present invention in a folded state when the basket is provided.

[0035] Figure 13 This is a diagram showing the sliding cart frame of the present invention after it is completely folded.

[0036] Figure 14 It is a side view of the sliding cart frame of the present invention after it is fully folded.

[0037] Figure 15 It is a perspective structural diagram of the stroller of the present invention when a seat is provided.

[0038] Figure 16 This is a perspective structural diagram of the stroller of the present invention when a sleeping basket is provided. DETAILED DESCRIPTION

[0039] In order to explain the technical content, structural features and achieved effects of the present invention in detail, the following is a detailed description in conjunction with the embodiments and the accompanying drawings.

[0040] like Figures 1 to 4 and Figures 12 to 14As shown, the cart 100 of the present invention includes a sliding cart frame 1 and a carrier 2. The sliding cart frame 1 includes a front leg 11, a rear leg 12, a rider 13, a base 14, a sliding seat 15, a first connecting member 16, and a second connecting member 17. In this embodiment, there is one base 14 and one sliding seat 15. The front leg 11, rear leg 12, rider 13, first connecting member 16, and second connecting member 17 are symmetrically arranged on opposite sides of the base 14. The following description uses the structure of one side as an example. Specifically, a front wheel 18 is provided at the lower end of the front leg 11, and a rear wheel 19 is provided at the lower end of the rear leg 12. The upper end of the front leg 11 is pivotally connected to the base 14 via a first pivot axis 11a. The upper end of the rear leg 12 is pivotally connected to the base 14 via a second pivot axis 12a. The lower end of the rider 13 is pivotally connected to the base 14 via a third pivot axis 13a. The two ends of the first connecting member 16 are respectively pivoted between the front foot 11 and the rear foot 12; the two ends of the second connecting member 17 are respectively pivoted between the front foot 11 and the rear end of the sliding seat 15. More specifically, the front end of the first connecting member 16 is pivoted to the middle of the front foot 11, with a pivot axis 161, and the rear end of the first connecting member 16 is pivoted to the lower end of the rear foot 12, with a pivot axis 162. The front end of the second connecting member 17 is pivoted to the middle of the front foot 11 and is coaxial with the pivot axis 161 of the front end of the first connecting member 16. The rear end of the second connecting member 17 is pivoted to the rear end of the sliding seat 15, with a pivot axis 171. The sliding seat 15 is disposed on the upper surface of the base 14 in a forward and backward sliding manner. The first pivot axis 11a is located in front of the second pivot axis 12a. The height of the first pivot axis 11a relative to the surface of the base 14 is less than the height of the second pivot axis 12a relative to the base 14. This allows the front leg 11 to rotate about the first pivot axis 11a to the upper rear portion of the base 14, while the rear leg 12 can rotate about the second pivot axis 12a to the upper rear portion of the base 14 and positioned above the front leg 11. This ensures that, after the sliding stroller frame 1 is folded, the base 14 is flat and free from obstruction by the front and rear legs 12 and the front and rear wheels 19, making it easier to place the stroller in the back seat of a car. Furthermore, the overlapping placement of the front and rear legs 11, 12, prevents them from interfering with each other and taking up too much space when folded. The height of the second pivot axis 12a is less than the height of the third pivot axis 13a. In this way, the rider 13 is positioned above the rear legs 12 after being folded, and interference between the rear legs 12 and the rider 13 is avoided during folding, thereby ensuring that the structure of the sliding cart frame 1 is compact after being folded.The carrier 2 is detachably mounted on the sliding seat 15. The specific mounting method can be screw fixing, snap connection, or connection and fixing by a connecting mechanism. The specific connection method is familiar to those skilled in the art and is not limited here. In addition, in this embodiment, the carrier 2 is a basket, and of course it can be a stroller seat 200, a sleeping basket 300, etc. Figure 15 and Figure 16 The rear end of the carrier 2 is provided with an ISOFIX connection mechanism 201 toward the rear side of the sliding cart frame 1, which can be connected to the ISOFIX interface on the rear seat of the car after the sliding cart frame 1 is folded.

[0041] See also Figure 2 and Figure 5 As shown, the base 14 is provided with a slide groove 14a extending in the front and rear directions, and the sliding seat 15 is slidably arranged in the slide groove 14a. Specifically, two rails 141 are provided on the base 14 with a gap, and the two rails 141 are connected to the base 14 by bolts. The slide groove 14a is formed between the two rails 141. The inner sides of the two rails 141 are respectively recessed with a groove body 141a, and the opposite sides of the sliding seat 15 are respectively protruding with a protrusion 151, and the protrusion 151 is slidably stuck in the groove body 141. By providing the slide groove 14a, the sliding seat 15 can slide stably and smoothly on the base 14, thereby improving the smoothness of the sliding cart frame 1 when folding.

[0042] Combine Figure 1 and Figure 2 The sliding cart frame 1 also includes a first locking mechanism (not shown). The first locking mechanism is disposed between the base 14 and the sliding seat 15 to lock or release the latter. The unlocking button of the first locking mechanism can be located on the rider 13 for easy operation. The first locking mechanism locks the base 14 and the sliding seat 15, thereby locking or releasing the sliding cart frame 1 when fully extended, ensuring the safety of the sliding cart frame 1. The first locking mechanism can be implemented using a spring-loaded retractable pin. Specifically, a pin is disposed on the base 14, and an opening is disposed on the sliding seat 15. A spring elastically presses against the pin, causing the pin to insert into the opening, thereby locking the sliding seat 15. Alternatively, the pin can be pulled out of the opening by a flexible member, thereby releasing the sliding seat 15. The flexible member can be extended to the rider 13 for operation. Of course, the first locking mechanism can also employ any other method that can restrict the sliding seat 15 from sliding relative to the base 14, which are not listed here.

[0043] See also Figure 4 、 Figures 6 to 8The sliding cart frame 1 further includes a second locking mechanism 20 disposed between the handle 13 and the base 14 to lock the handle 13 so that the handle 13 is fixed relative to the base 14, or to release the handle 13 so that the handle 13 can rotate about the third pivot axis 13a. The second locking mechanism 20 can lock the angle of the handle 13 relative to the base 14 when fully extended, ensuring the stability of the handle 13 when extended. When folded, the second locking mechanism 20 can release the handle 13 relative to the base 14, allowing the handle 13 to rotate and fold relative to the base 14, ensuring a more compact structure of the folded sliding cart frame 1. Specifically, the second locking mechanism 20 includes a push rod 210, a driving member 220, and a locking member 230. The base 14 is provided with a first ear 142, and the rider 13 is provided with a second ear 131. The first ear 142 and the second ear 131 are coaxially pivoted about the third pivot axis 13a. The first ear 142 and the second ear 131 together form a cavity 142b. The locking member 230 is positioned within the cavity 142b. Specifically, the locking member 230 is coaxially disposed with the third pivot axis 13a between the first ear 142 and the second ear 131 and is movable along the direction of the third pivot axis 13a. The locking member 230 is circumferentially provided with engaging teeth 231. Engaging grooves 142a corresponding to the engaging teeth 231 are circumferentially disposed within the first ear 142 and the second ear 131, respectively. The push rod 210 is movably disposed within the rider 13, and the driving member 220 is disposed within the cavity 142b. One end of the push rod 210 extends into the cavity 142b and connects to the driving member 220, thereby driving the driving member 220. The driving member 220 drives the locking member 230 to fully engage with the engaging groove 142a of the second ear portion 131 and disengage from the engaging groove 142a of the first ear portion 142, thereby releasing the rider 13 from the base 14. Alternatively, the push rod 210 can engage with both the engaging grooves 142a of the first ear portion 142 and the engaging grooves 142a of the second ear portion 131, thereby locking the rider 13 from the base 14. More specifically, the driving member 220 is provided with a driving bevel 221 on the side facing the locking member 230, and the locking member 230 is provided with a matching bevel 232 on the side facing the driving member 220. When the driving member 220 moves, the driving bevel 221 and the matching bevel 232 slide against each other to drive the locking member 230 to move.By utilizing the interaction between the driving inclined surface 221 and the mating inclined surface 232, the axial movement of the driving member 220 along the rider 13 is converted into movement of the locking member 230 along the third pivot axis 13a, resulting in a simple structure and convenient control. Furthermore, the second locking mechanism 20 also includes a first return member 240 and a second return member 250, both of which are compression springs. The first return member 240 is disposed between the second ear 131 and the locking member 230 and provides an elastic force that causes the locking member 230 to engage between the engaging groove 142a of the first ear 142 and the engaging groove 142a of the second ear 131. The first return member 240 enables the locking member 230 to automatically lock the rider 13 and the base 14. Therefore, when the sliding stroller frame 1 is fully extended, it automatically locks into a locked state, eliminating the need for manual operation and improving ease of use. The second reset member 250 is disposed between the driving member 220 and the first ear portion 142 to provide an elastic force to reset the driving member. In this embodiment, the movement of the push rod 210 can be controlled by a separate control member or by other actuating members, as described below.

[0044] See also Figure 1 、 Figure 4 、 Figures 9 to 11The sliding cart frame 1 also includes a telescopic handle 30 and a third locking mechanism 40. The telescopic handle 30 is telescopically coupled to the upper end of the rider 13. When the telescopic handle 30 is fully retracted into the rider 13, the end of the telescopic handle 30 proximate to the rider 13 pushes against the push rod 210 of the second locking mechanism 20, causing the push rod 210 to actuate the driving member 220, thereby unlocking the locked connection between the rider 13 and the base 14. The third locking mechanism 40 is disposed between the telescopic handle 30 and the rider 13 to lock the telescopic handle 30, securing it relative to the rider 13, or to release the telescopic handle 30, allowing it to extend or retract relative to the rider 13. The provision of the telescopic handle 30 makes the sliding cart frame 1 more flexible and convenient to use. The third locking mechanism 40 allows the telescopic handle 30 to be extended or retracted into the rider 13, and locks the rider 13 and the telescopic handle 30 when extended. This not only makes the structure of the sliding cart frame 1 more stable and secure when deployed, but also makes the structure of the sliding cart frame 1 more compact and smaller when folded. Specifically, the third locking mechanism 40 includes an operating member 410, a flexible member 420, a mounting seat 430, a slider 440, a sliding shaft 450, a locking pin 460, and a spring 470. The operating member 410 is disposed at one end of the telescopic handle 30. One end of the operating member 410 is connected to the flexible member 420, and the other end of the flexible member 420 is connected to the slider 440. The rider 13 is provided with a plurality of locking holes 132. The telescopic handle 30 is provided with a through hole 310. The mounting seat 430 is fixed within the telescopic handle 30. The slider 440 is slidably disposed within the mounting seat 430. The mounting seat 430 is provided with an elongated hole 431 perpendicular to the movement direction of the slider 440. The slider 440 is provided with an inclined guide hole 441. The sliding shaft 450 is fixed to the locking pin 460 and passes through the elongated hole 431 and the guide hole 441. The spring 470 is disposed between the slider 440 and the telescopic handle 30; the spring 470 is a compression spring 470. The locking pin 460 extends out of the through hole 310.Operating the operating member 410 can drive the flexible member 420, and the flexible member 420 pulls the slider 440, so that the guide hole 441 and the elongated hole 431 act together to slide the shaft 450, and then the sliding shaft 450 drives the locking pin 460 to exit the locking hole 132, thereby releasing the lock between the rider 13 and the telescopic handle 30, and allowing the telescopic handle 30 to slide out relative to the rider 13; or under the elastic force of the spring 470, the guide hole 441 and the elongated hole 431 act together to slide the shaft 450, and then the sliding shaft 450 drives the locking pin 460 to insert into one of the locking holes 132, thereby locking the rider 13 and the telescopic handle 30.

[0045] Combining the above and Figures 12 to 14 The following is a detailed description of the operating principle of the cart 100 of the present invention, as follows:

[0046] When the sliding cart frame 1 is fully unfolded, the sliding seat 15 is fixed relative to the base 14 . At this time, the basket can be installed on the sliding seat 15 to form the cart 100 for use.

[0047] When pushing the cart 100, the first locking mechanism is first operated to release the lock between the sliding seat 15 and the base 14. The front leg 11 is then driven to swing backward about the first pivot axis 11a until it reaches above either side of the sliding seat 15. Simultaneously, the front leg 11 pushes the rear leg 12 to swing backward about the second pivot axis 12a via the first connecting member 16 until it reaches above either side of the sliding seat 15. The second connecting member 17 then pushes the sliding seat 15, causing it to slide backward relative to the base 14. Once the front and rear legs 11, 12 are fully folded, the operating member 410 of the third locking mechanism 40 is operated to release the telescopic handle 30. The telescopic handle 30 is then pushed and retracted into the rider's hand 13 until it is fully retracted. When the telescopic handle 30 is retracted, the end of the telescopic handle 30 located inside the rider 13 pushes against the push rod 210 of the second locking mechanism 20. This push rod 210 then drives the driver 220, which in turn drives the locking member 230 via the driving ramp 221. The locking member 230 disengages from the engagement slot 142a of the first ear 142 of the base 14, thereby releasing the rider 13 from the base 14. At this point, the rider 13 is pressed downward, causing it to swing toward the sliding seat 15 around the third pivot axis 13a. The sliding stroller frame 1 is now fully folded. In this position, the bottom of the base 14 is flat and unobstructed by the front and rear legs 11 and 12. Furthermore, the rear end of the carrier 2 is equipped with an ISOFIX connection mechanism. Therefore, the stroller 100, consisting of the sliding stroller frame 1 and the carrier 2, can be placed in the rear seat of a car as a safety seat.

[0048] To deploy the stroller 100, the rider 13 is simply lifted upward. The rider 13 is then deployed upward about the third pivot axis 13a and locked by the second locking mechanism 20. The rider 13 is then further lifted upward. Under the force of gravity, the front legs 11 and rear legs 12 swing downward toward the base 14 and deploy. The deployment of the front legs 11 drives the sliding seat 15 forward. Once the front legs 11, rear legs 12, and sliding seat 15 are in position, the first locking mechanism is operated to lock the sliding seat 15 with the base 14, placing the entire sliding stroller frame 1 in a stable deployed state. Finally, the third locking mechanism 40 is operated to release the locking mechanism between the telescopic handle 30 and the rider 13. The telescopic handle 30 is then pulled out of the rider 13. Finally, the third locking mechanism 40 is operated to lock the telescopic handle 30 with the rider 13, and the stroller 100 is ready for deployment.

[0049] The present invention pivotally connects the front leg 11, the rear leg 12, and the rider 13 to the base 14, and slidably provides a sliding seat 15 on the base 14. A first connecting member 16 is provided between the front leg 11 and the rear leg 12, and a second connecting member 17 is provided between the front leg 11 and the sliding seat 15. This allows the front leg 11 to swing and fold backward relative to the base 14, simultaneously driving the rear leg 12 to swing and fold, and at the same time, pushing the sliding seat 15 to move along the rear end of the base 14. Therefore, the sliding seat 15 can remain horizontal after the sliding cart frame 1 is folded, so that the carrier 2 supported on the sliding seat 15 does not need to be detached from the sliding seat 15 when the sliding cart frame 1 is folded, greatly improving the convenience of use. Furthermore, the front legs 11 and the rear legs 12 can be folded to the upper rear portion of the base 14 , so that the folded sliding stroller frame 1 forms a safety seat with a flat bottom that can be installed on the back seat of a car, thus achieving multiple uses of one vehicle and greatly improving utilization rate.

[0050] The above disclosure is merely a preferred embodiment of the present invention and certainly cannot be used to limit the scope of the present invention. Therefore, equivalent changes made according to the scope of the patent application of the present invention still fall within the scope covered by the present invention.

Claims

1. A sliding cart frame, characterized in that: The invention comprises a front foot, a rear foot, a rider, a base, a sliding seat, a first connecting member and a second connecting member, wherein the upper end of the front foot is pivotally connected to the base via a first pivot center axis; the upper end of the rear foot is pivotally connected to the base via a second pivot center axis; the lower end of the rider is pivotally connected to the base via a third pivot center axis; the two ends of the first connecting member are respectively pivotally connected between the front foot and the rear foot; the two ends of the second connecting member are respectively pivotally connected between the front foot and the rear end of the sliding seat; the sliding seat is arranged on the base in a forward and backward sliding manner.

2. The sliding cart frame according to claim 1, characterized in that: The first pivot center axis is located in front of the second pivot center axis.

3. The sliding cart frame according to claim 1, wherein: The height of the first pivot center axis relative to the surface of the base is smaller than the height of the second pivot center axis relative to the base.

4. The sliding cart frame according to claim 3, wherein: The horizontal height of the second pivot center axis is smaller than the horizontal height of the third pivot center axis.

5. The sliding cart frame according to claim 1, wherein: The base is provided with a slide groove extending along the front and rear directions, and the sliding seat is slidably arranged in the slide groove.

6. The sliding cart frame according to claim 5, characterized in that: Two tracks are provided on the base with a gap, and the slide groove is formed between the two tracks. The inner sides of the two tracks are respectively provided with groove bodies in a recessed manner, and the opposite sides of the sliding seat are respectively provided with protruding blocks, and the protrusions are slidably clamped in the groove bodies.

7. The sliding cart frame according to claim 1, wherein: The sliding cart frame further comprises a first locking mechanism, which is arranged between the base and the sliding seat to lock or unlock the latter.

8. The sliding cart frame according to claim 1, wherein: The sliding cart frame further includes a second locking mechanism disposed between the rider and the base to lock the rider so that the rider and the base are relatively fixed, or to release the rider so that the rider can rotate around the third pivot axis.

9. The sliding cart frame according to claim 8, characterized in that: The second locking mechanism includes a push rod, a driving member and a locking member, the base is provided with a first ear, the rider is provided with a second ear, the locking member is coaxially arranged between the first ear and the second ear with the third pivot center axis, and the locking member is movably arranged along the extension direction of the third pivot center axis; the push rod is movably arranged in the rider, one end of the push rod is connected to the driving member to drive the driving member, so that the driving member drives the locking member to be completely stuck in the second ear, so that the rider and the base are released, or stuck between the first ear and the second ear, so that the rider and the base are locked.

10. The sliding cart frame according to claim 9, wherein: The driving member is provided with a driving inclined surface on one side facing the locking member, and the locking member is provided with a matching inclined surface on one side facing the driving member. When the driving member moves, the driving inclined surface and the matching inclined surface slide against each other to drive the locking member to move.

11. The sliding cart frame according to claim 9, wherein: The second locking mechanism further includes a first restoring member, which is disposed between the second ear portion and the locking member and provides an elastic force that causes the locking member to be clamped between the first ear portion and the second ear portion.

12. The sliding cart frame according to claim 9, wherein: The second locking mechanism further includes a second restoring member, which is disposed between the first ear portion and the driving member and provides an elastic force for restoring the driving member.

13. The sliding cart frame according to claim 1, wherein: The sliding cart frame further comprises a telescopic handle which is telescopically sleeved on the upper end of the rider's handle.

14. The sliding cart frame according to claim 10, wherein: The sliding cart frame further includes a third locking mechanism, which is disposed between the telescopic handle and the rider to lock the telescopic handle so that the telescopic handle and the rider are relatively fixed, or to release the telescopic handle so that the telescopic handle can be extended or retracted relative to the rider.

15. The sliding cart frame according to claim 14, wherein: The third locking mechanism includes an operating member, a mounting seat, a slider, a sliding shaft, a locking pin and a spring, the rider is provided with a through hole, the telescopic handle is provided with a locking hole, the mounting seat is fixed in the telescopic handle, the slider is slidably arranged in the mounting seat, the mounting seat is provided with an elongated hole perpendicular to the moving direction of the slider, the slider is provided with an inclined guide hole, the sliding shaft is fixed to the locking pin and the sliding shaft passes through the elongated hole and the guide hole, and the spring is arranged between the slider and the telescopic handle; the locking pin extends out of the through hole, and the operating member is connected to the slider to drive the slider when moving, so that the guide hole and the elongated hole work together to drive the locking pin to exit the locking hole, thereby releasing the rider and the telescopic handle, or extending into the locking hole, thereby locking the rider and the telescopic handle.

16. A cart, characterized in that: The invention comprises a carrier and a sliding cart frame according to any one of claims 1 to 15, wherein the carrier is detachably mounted on the sliding seat.

17. The stroller according to claim 16, wherein: The carrier is a stroller seat, a sleeping basket or a carrying basket.

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