CN212332756U

CN212332756U - Children's barrow

Info

Publication number: CN212332756U
Application number: CN202020370120.1U
Authority: CN
Inventors: 夏铁军; 马聪泉; 赵国松
Original assignee: Shaoxing Shangyu Rixing Hardware Products Co Ltd
Current assignee: Shaoxing Shangyu Rixing Hardware Products Co Ltd
Priority date: 2020-03-20
Filing date: 2020-03-20
Publication date: 2021-01-12
Anticipated expiration: 2030-03-20

Abstract

The application discloses a stroller, which comprises two side frames and a connecting assembly, wherein the connecting assembly comprises fixed rods and cross rods, the connecting assembly comprises the fixed rods and the cross rods, the side frames are in an unfolding state and a folding state, connecting shafts between all the cross rods and the fixed rods are positioned on two parallel straight lines in the folding state of the side frames, and the side frames can turn around the connecting shafts in opposite directions and are close to a plane determined by the cross rods; both side frames include: a front leg bar and a rear leg bar; a handspike; a side support rod; the lower push rod is provided with a sliding sleeve, and the top of the side holding rod is rotatably connected with the sliding sleeve. The stroller disclosed in the present application can provide a comfortable seating space for a child in a deployed state. The both ends setting of pole is held up to the side is under between handspike and the back foot pole, and under children's shallow expansion state, both are nearer in children's shallow vertical direction distance, therefore the pole is held up to the side is whole comparatively "gentle". Children can be comfortable and put both arms on the side-supporting rod, and the side-supporting rod also can provide protection in children's both sides.

Description

Children's barrow

Technical Field

The application relates to the field of children's supplies, in particular to a stroller.

Background

The frame of current bassinet is mostly collapsible structure, and chinese patent document with publication number CN103507846A discloses a children's shallow, and the shallow frame includes symmetrical left side support and right side support, connects the link between left side support and right side support, and when with frame locking mechanical system unblock back, left side support can fold respectively with right side support, then with left side support and right side support respectively relative around the link rotation draw close. However, there are various disadvantages, such as the side rails are too "vertical" in the vertical direction of the stroller, the child as a passenger cannot comfortably put the arms on the side rails, and the lateral protection for the child is insufficient.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the application discloses a children's cart, including the both sides frame of mutual disposition and a plurality of coupling assembling of setting between the both sides frame, coupling assembling includes dead lever and both ends that set up in pairs and the mated dead lever rotates the horizontal pole of being connected, and the side bearer has expansion state and fold condition, and under the side bearer fold condition, the connecting axle between all horizontal poles and the dead lever is in two parallel straight lines, the side bearer can overturn in opposite directions around the connecting axle, is close to the plane that the horizontal pole was confirmed; both side frames include:

the tops of the front foot rod and the rear foot rod are hinged with each other;

the hand push rod comprises an upper hand push rod and a lower hand push rod which are movably connected, and the bottom of the lower hand push rod is hinged with the middle part of the rear foot rod;

the bottom of the side supporting rod is hinged with the top of the rear foot rod, and the top of the side supporting rod is slidably mounted on the lower hand push rod;

the lower push rod is provided with a sliding sleeve, and the top of the side holding rod is rotatably connected with the sliding sleeve.

Optionally, the side frame further comprises a first locking mechanism, and the first locking mechanism is arranged between the sliding sleeve and the hand push rod.

Optionally, the first locking mechanism includes a first locking pin, the first locking pin is slidably mounted in the handle bar, and has a first locking position protruding from the handle bar to engage with the sliding sleeve, and the sliding sleeve has a locking groove engaged with the first locking pin.

Optionally, the first locking mechanism comprises:

the first locking pin is slidably arranged in the hand push rod and is provided with a first locking position which extends out of the hand push rod and is clamped with the sliding sleeve;

and the first driving piece is used for driving the first locking pin to enter or exit the first locking position.

Optionally, the handspike includes clearance fit's last hand push rod and lower hand push rod, the sliding sleeve wears to overlap on lower handspike, under the expanded state, the sliding sleeve with lower hand push rod offsets.

Optionally, a lower joint seat is arranged at the top of the lower-hand push rod, the size of the lower joint seat is larger than the rod diameter of the lower-hand push rod, and the sliding sleeve abuts against the lower joint seat in the unfolded state.

Optionally, the upper hand push rod and the lower hand push rod are hinged and matched through a first rotary joint;

the first rotary joint includes:

the upper joint seat is arranged at the bottom of the upper hand push rod;

the lower joint seat.

Optionally, the lower joint seat and the lower hand push rod are in plug fit.

Optionally, the upper hand push rod and the side holding rod are in the same plane, the lower hand push rod is located on the inner side of the plane, the seat rod is rotatably connected with the side holding rod through a swing rod, one end of the swing rod is fixedly connected with the middle of the seat rod, the other end of the swing rod is rotatably connected with the side holding rod, and the swing rod is hidden on the inner side of the side holding rod in the unfolded state of the frame.

The stroller disclosed in the present application can provide a comfortable seating space for a child in a deployed state. The both ends setting of pole is held up to the side is under between handspike and the back foot pole, and under children's shallow expansion state, both are nearer in children's shallow vertical direction distance, therefore the pole is held up to the side is whole comparatively "gentle". Children can be comfortable and put both arms on the side-supporting rod, and the side-supporting rod also can provide protection in children's both sides.

Drawings

Fig. 1 is a schematic structural view of the stroller of the present invention.

Fig. 2 is an enlarged view of a portion a in fig. 1.

Fig. 3 is a schematic view of the stroller shown in fig. 1 after the side arm rest has exploded.

Fig. 4 is an enlarged view of a portion of fig. 3.

Fig. 5 is a schematic view of the internal structure of the first revolute joint.

Fig. 6 is a schematic view of the assembly of the first locking pin.

Fig. 7 is a schematic view of the second locking mechanism assembly.

Fig. 8 is a schematic view of the second locking mechanism of fig. 7 from another perspective.

Fig. 9 is a schematic view of the second locking mechanism in engagement.

Fig. 10 is a schematic view of a folding process of the stroller.

Fig. 11 is a schematic view of the stroller in a first stage of folding.

Fig. 12 is a schematic view of the stroller of fig. 11 from another perspective.

Fig. 13 is a schematic view of the stroller in a second stage of folding.

Fig. 14 is a schematic view of the stroller of fig. 13 from another perspective.

Fig. 15 is a simplified structural schematic diagram of the stroller in an intermediate folded state.

FIGS. 16a, 16b and 16c are schematic views of three side frames.

The reference numerals in the figures are illustrated as follows:

1. a frame; 10. a side frame; 11. a front foot bar; 111. a front wheel; 12. a rear foot bar; 121. a rear wheel; 122. A brake pedal; 123. a rear wheel seat; 13. a side support rod; 131. a seat post; 132. a swing rod; 14. a connecting assembly; 141. fixing the rod; 142. a cross bar; 143. a first connection assembly; 144. a second connection assembly; 1441. A second avoidance zone; 145. a third connection assembly; 1451. a third avoidance zone; 146. a fourth connection assembly; 15. a hand-up push rod; 151. an upper joint seat; 16. a lower hand push rod; 161. an extension section; 162. a lower joint seat; 17. a linkage rod; 171. a drive link;

2. a first revolute joint; 21. a second locking mechanism; 211. a first locking ratchet; 212. a second locking ratchet; 213. a ratchet wheel; 2131. a passive bevel; 214. a locking shaft; 2141. a drive ramp; 2142. a first driving section; 2143. a second driving section; 215. a first drive disk; 2151. a first traction cable; 2152. a first guide groove; 2153. a first drive slot; 216. a second drive disc; 2161. a second traction cable; 2162. a second driving groove; 2163. a second guide groove; 217. resetting the pressure spring; 2171. a first limit slot; 2172. a second limit slot;

3. a sliding sleeve; 31. a first locking mechanism; 311. a first locking pin; 312. a first driving member; 3121. a first driving block; 3122. an active area.

Detailed Description

The technical solutions of the present application will be described clearly and completely with reference to the accompanying drawings, and it is to be understood that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

A children cart is disclosed, as shown in fig. 1-4, comprising two oppositely arranged side frames 10 and a plurality of connecting assemblies 14 arranged between the two side frames 10, wherein each of the two side frames 10 comprises a front foot bar 11, a rear foot bar 12, a hand push bar and a side support bar 13, the tops of the front foot bar 11 and the rear foot bar 12 are hinged with each other, the hand push bar comprises an upper hand push bar 15 and a lower hand push bar 16 which are movably connected, and the bottom of the lower hand push bar is hinged with the middle part of the rear foot bar 12; the bottom of side bar 13 is hinged to the top of back foot bar 12 and the top is slidably mounted on lower hand push bar 16.

The front leg 11 and the rear leg 12 refer to the front-rear relationship of the stroller when the stroller is pushed forward, and are not limited to the front-rear relationship in the absolute direction, for example, when a user stands behind the stroller and applies a pulling force to the push rod to drive the stroller to move backward, the front leg 11 is located at the rear side in the traveling direction of the rear leg 12.

The bottom of the front foot bar 11 is provided with a front wheel 111, and the distance between the front wheels 111 in the unfolded state of the two side frames 10 is the front wheel track; the rear wheels 121 are mounted on the bottom of the rear leg 12, and the distance between the rear wheels 121 in the unfolded state of the side frames 10 is the rear wheel track. Generally, the front wheels 111 are universal wheels and the rear wheels are directional wheels 121, and the front track is the track width of the two front wheels when the cart is pushed forward.

As shown in fig. 1, the bottom of the front wheel rod 11 is provided with a front wheel seat, the bottom of the rear foot rod 12 is provided with a rear wheel seat 123, the front wheel seat is connected with the front foot rod 11 through a vertical connecting shaft, and the front wheel seat can freely rotate 360 degrees around the connecting shaft; the rear wheel seat 123 is fixedly inserted into the bottom end of the rear leg rod 12, and the rear wheel 121 and the rear leg rod 12 are substantially in the same plane. Certainly, a cross bar can be arranged between the two rear foot bars, and two rear wheels are respectively installed at two ends of the cross bar, but due to the design, the rear wheels 121 and the rear foot bars 12 are staggered by a certain distance, so that the size of the folded frame 1 is large.

The side frame 10 has a folded state and an unfolded state, and when folded, the rotating hand push rod is close to the rear foot rod 12, and the top of the side holding rod 13 slides along the hand push rod, and simultaneously drives the front foot rod 11 to rotate and draw close to the rear foot rod 12. In order to realize the linkage of the front foot rod, in some embodiments, as shown in fig. 16a, the bottom of the hand push rod is extended, a linkage rod 17 is disposed between the extension segment 161 and the front foot rod 11, and two ends of the linkage rod 17 are respectively rotatably connected with the extension segment 161 and the front foot rod 11.

The manner of interlocking the front leg bar 11 is not limited to the above-described configuration, and as shown in fig. 16b, one end of the interlocking bar 17 is rotatably connected to the front leg bar 11, and the other end is rotatably connected to the middle portion of the lower hand push bar 16. As shown in FIG. 16c, the front leg bar 11 and the rear leg bar 12 are provided with two folding bars, and the driving link 171 is rotatably connected to the two folding bars at one end and to the side rail 13 at the other end.

In some embodiments, as shown in fig. 1 and 3, four connecting assemblies are disposed between the two side frames, respectively: a first connection member 143 provided between the seat posts 131 of the both side frames 10; a second connecting member 144 provided between the rear foot bars 12 of the side frames 10; a third connecting assembly 145 disposed between the front leg rods 11 of the side frames 10; and a fourth connecting assembly 146 disposed between the hand bars of the side frames 10.

Because the fourth connecting assembly is arranged between the push rods, in order to ensure that the appearance is not obtrusive, the top of the upper hand push rod 15 is upwards warped to form a fixed rod 142 and is connected through a cross rod 142 to form the fourth connecting assembly, and the diameters of the fixed rod and the cross rod are basically consistent with the diameter of the upper hand push rod 15.

Theoretically, the frame stability can be ensured only by providing the connection members between the front leg 11, the rear leg 12 and the handle bar, but the first connection member 143 is provided between the two legs to improve the stability.

To achieve the secondary folding of the frame 1, in some embodiments, each of the connecting assemblies includes a pair of fixing rods 141 and a cross bar 142 having both ends rotatably connected to the fixing rods. In the folded state of the side frame 10, as shown in fig. 15, all the cross bars 142 are in the same plane, the rotation axes between them and the fixing bars 141 are in two straight lines a0 and B0, and the two side frames can be respectively turned around the rotation axes a1-a4 and B1-B4, and close to the plane defined by the cross bars, so as to reduce the width of the frame. The side frames should be as close as possible to the plane defined by the cross bar and the spacing between the side frames should be as small as possible to minimize the bulk of the frame.

Of course, in some stroller applications, the size of the stroller need not be reduced by a second folding, and the connecting members may be straight links, with the ends of the straight links being directly and fixedly connected to the corresponding rods of the side frames 10.

In some embodiments, a one-way rotation limiting mechanism is disposed at the connection between the fixing rod 141 and the cross rod 142 to prevent the two side frames 10 from turning in opposite directions. The unidirectional rotation limiting mechanism comprises a limiting part, and the limiting part is used for limiting the rotation angle of the fixed rod relative to the cross rod 142. There are many settings in an actual product. For example, in fig. 14, the cross bar 142 of the third connecting assembly 145 has openings at both ends thereof for engaging with the fixing bars 141, and one side of the ends of the fixing bars is provided with a protrusion, and when the fixing bars 141 move to an extreme position relative to the cross bar 142, the protrusion abuts against the bottom of the openings.

Referring to fig. 4, the cross bar 142 of the second connecting member 144 is provided with a second escape area 1441, and at least a portion of the fixing rod 141 of the second connecting member 144 is received or not received in the second escape area 1441 during the process of turning the two side frames 10 in the folded state toward each other. The second avoidance area 1441 is mainly used to provide more movement space for the fixing rod 141, so as to optimize the movement stroke of the two side frames 10 approaching each other, and the function of the avoidance area can also be realized by the specially-shaped fixing rod 141, and the fixing rod 141 and the cross bar 142 are prevented from interfering with each other by the extension of the fixing rod 141.

The crossbar 142 of the third connecting assembly 145 is provided with a third escape area 1451, and at least a portion of the fixing rod 141 of the third connecting assembly 145 is received or not received in the third escape area 1451 when the two side frames 10 are closed to each other in the folded state.

In order to minimize the size of the stroller, as shown in fig. 1 and 2, in some embodiments, the push rod includes an upper push rod 15 and a lower push rod 16 which are rotatably connected, the side support rod 13 is slidably engaged with the lower push rod 16, and the rotational joint between the upper push rod 15 and the lower push rod 16 reaches the lowest position of the rear wheel 121 in the folded state. Obviously, the hand push rod can also be a telescopic rod, and the effect of shortening the hand push rod can also be achieved. Further, in the frame-deployed state, the upper hand push rod 15 and the lower hand push rod 16 are arranged in the same direction, and can efficiently transmit force to the front frame when pushed.

As shown in fig. 1-4, in some embodiments, the side rails 13, the rear foot rail 12, the front foot rail 11 and the upper hand push rod 15 are substantially in the same plane, and the lower hand push rod 16 is located at the inner side of the plane, so that the folded frame is more neat and convenient to pack and carry.

Whereas the rear foot bar 12 and the front foot bar 11 are in the same plane and the front wheels 111 and the rear wheels 121 are mounted on the bottom of the front foot bar 11 and the rear foot bar 12, respectively, it may cause the front wheels 111 and the rear wheels 121 to interfere when folded, and in some embodiments, the bottom of the front foot bars 11 are bent inward in a defined plane such that the front wheels 111 and the rear wheels 121 are staggered, i.e., the front wheels are spaced less apart than the rear wheels. The magnitude of the inward curve of the front leg 11 cannot be excessive, however, at least the front wheel 111 cannot cross the point of attachment of the crossbar 142 and the securing bar 141.

In order to allow the side rails 13 and the front leg rail 11 to be smoothly placed against the rear leg rail 12 in the folded state, in some embodiments, the top of the rear leg rail 12 is provided with a T-shaped connector, and the bottom of the side rails 13 and the top of the front leg rail 11 are hinged to both ends of the T-shaped connector, respectively. Meanwhile, in order to improve the aesthetic degree of the baby stroller, the T-shaped connectors, the front foot rod 11 and the side supporting rods 13 are in the same straight line.

In one embodiment, a brake pedal 122 is disposed on the inner side of each of the rear wheel seats 123, wherein one brake pedal 122 is used for actuating the brake and the other brake pedal is used for releasing the brake, each brake pedal has two working positions of up-and-down, and when one brake pedal is depressed, the other brake pedal is up-and-vice versa, so that one brake pedal is always in the working position of down-depression. In some embodiments, in the folded state of the frame 1, both rear wheels 121 and one of the brake pedals are simultaneously grounded, and the support frame is in a standing state.

In some embodiments, the side arm rest 13 is a special-shaped structure with a narrow lower part and a wide upper part, as shown in fig. 3, the side arm rest is divided into two sections which are inserted into each other, wherein the upper section is an arc-shaped structure, and the lower section and the front foot rod 11 are in the same line, so that both hands of a child sitting conveniently lean on the side arm rest 13.

The top of the side supporting rod 13 is slidably mounted on the hand push rod, and in some embodiments, the hand push rod is provided with a sliding sleeve 3, and the top of the side supporting rod 13 is rotatably connected with the sliding sleeve 3. It is of course also possible to provide a sliding groove on the hand push rod, and to provide a sliding pin on the top of the side support rod 13, which is engaged with the sliding groove, and the sliding pin should be able to rotate in the sliding groove or the side support rod 13.

The traditional stroller is composed of a cloth cover and a frame, the frame is a framework for supporting the stroller, and the cloth cover is mainly used for forming a seat and a backrest on the frame. In some embodiments, the side frames 10 are provided with seat posts 131, and the seat can be formed when the seat portion of the cloth cover is tied to the seat posts 131. In each side frame 10, seat bar 131 is hinged at its rear end to lower hand push rod 16, at its middle portion to side rail 13, and at its front end to extend beyond side rail 13 away from lower hand push rod 16. The front end of the seat post 131 is extended mainly to provide a wider seating space, thereby providing a comfortable seating feeling.

As described above, for the compact folding structure, upper hand push rod 15 and side rest 13 are in the same plane, and lower hand push rod 16 is located inside the plane, which would result in an excessive gap between seat post 131 and the side rest if the two were directly hinged. Forcing seat bar 131 closer to side rail 13 results in seat bar 131 being angled outward, interfering with folding. In some embodiments, the seat post 131 is rotatably connected to the side rail 13 through a swing link 132, one end of the swing link 132 is fixedly connected to the middle of the seat post 131, and the other end is rotatably connected to the side rail 13, and in the frame unfolding state, the swing link 132 is hidden inside the side rail 13.

To maintain the stroller in the deployed position, the side frame 10 also includes a first locking mechanism. The first locking mechanism locks the relative position of each rod piece and keeps the relative position stable. Because each rod piece is interlocked, the first locking mechanism can be arranged at any motion joint.

In some embodiments, the first locking mechanism is disposed between the sliding sleeve 3 and the handle bar. The first locking mechanism 31 includes a first locking pin 311, the first locking pin 311 is slidably installed in the handle bar and has a first locking position (as shown in fig. 6) protruding out of the handle bar to engage with the sliding sleeve, and the sliding sleeve 3 has a locking groove engaged with the first locking pin 311.

When the first locking pin 311 is in the first locking position, the sliding sleeve 3 cannot slide relative to the hand push rod, so that the state of the side frame 10 is locked; when the first locking pin 311 is withdrawn from the first locking position, the slide can slide freely relative to the handle bar, thereby releasing the motion stroke of the spatial state change of the side frame 10.

The movement of the first locking pin 311 may be manually triggered by a user, and in order to further improve the user's operational experience, in an embodiment, the first locking mechanism 31 comprises:

the first locking pin 311 is slidably mounted in the hand push rod and is provided with a first locking position which extends out of the hand push rod and is clamped with the sliding sleeve;

a first driving member 312 for driving the first locking pin 311 into or out of the first locking position.

The first driving member 312 has various forms in the art, such as a member extending to the outside of the lever for user operation convenience, etc., and in an embodiment disclosed with reference to fig. 6, the first driving member 312 includes a first driving block 3121, an active region 3122 is provided in the first driving block 3121 for accommodating the first locking pin 311, and a traction cable (in the illustrated embodiment, a bead traction cable, hereinafter referred to as a second traction cable 2161) extending to the outside of the active region 3122 is coupled to the first locking pin 311.

In this field, the flexible layout can be brought in the setting of haulage cable, and the part setting of conveniently will unblock is in the position that the user operated easily, brings audio-visual, convenient operation impression when guaranteeing that unblock and locking action are stable. The present embodiment is characterized in that the first driving block 3121 is provided with an active region 3122 receiving the first locking pin 311, thereby improving the stability of the first driving block 3121 in driving the first locking pin 311. In the illustrated solution, the first driving block 3121 provides only guidance for the first locking pin 311, the actual driving force of the first locking pin 311 being realized by a traction cable; in other schemes, the first driving block 3121 can be driven by a traction cable to drive the first locking pin 311; the corresponding first driving member 312 may further include a first locking elastic member (not shown) that holds the first locking pin 311 in the first locking position. The first locking elastic member serves to hold the first locking pin 311 in a free state at the first locking position.

Referring to fig. 4 to 9, the hand push rod comprises an upper hand push rod 15 and a lower hand push rod 16 which are movably matched, and the upper hand push rod 15 and the lower hand push rod 16 are hinged and matched through a first rotary joint 2; a second locking mechanism 21 for locking the positional relationship between the upper hand push rod 15 and the lower hand push rod 16 is provided in the first rotary joint 2.

In an embodiment, the first rotary joint 2 comprises:

an upper joint seat 151 at the bottom of the upper hand push rod 15;

a lower knuckle mount 162 at the top of lower hand putter 16;

both the upper joint seat 151 and the lower joint seat 162 enclose to form a first revolute joint 2.

When the second locking mechanism 21 is in a locked state, the two parts of the first rotary joint 2 cannot rotate relatively; the second lock mechanism 21 is in the unlocked state, and the two parts of the first rotary joint 2 can freely rotate, thereby enabling the upper hand push rod 15 and the lower hand push rod 16 to be folded with each other.

The first rotary joint 2 is formed by surrounding the upper joint seat 151 and the lower joint seat 162, and this way can form a larger joint than other ways, thereby providing a space for installation and adaptation for other structures or mechanisms, and simultaneously avoiding the generation of a hand-clamping gap between the two.

In some embodiments, the lower joint seat 162 and the lower push rod 16 are in a plug-in fit, the sliding sleeve 3 is sleeved on the lower push rod 16, and the lower joint seat 162 is matched with the sliding sleeve 3 to provide a limit.

In order to achieve locking of the first rotary joint 2, with reference to fig. 7 and 8, the second locking mechanism 21 includes:

a first locking ratchet 211 provided inside the upper joint seat 151;

a second locking ratchet 212 provided inside the lower joint seat 162;

a ratchet 213 installed inside the first rotary joint 2 and capable of moving along the rotation axis of the first rotary joint 2, the ratchet 213 being capable of engaging or releasing the first locking ratchet 211 and the second locking ratchet 212 at different positions.

The ratchet wheel 213 is movable along the rotation axis of the first rotary joint 2, and when the ratchet wheel 213 moves inside the upper joint seat 151, the ratchet wheel 213 is disengaged from the second locking ratchet 212, and at this time the upper joint seat 151 and the lower joint seat 162 are able to rotate relative to each other; when the ratchet wheel 213 moves between the upper joint seat 151 and the lower joint seat 162, the ratchet wheel 213 is simultaneously engaged with the first locking ratchet 211 and the second locking ratchet 212, and the upper joint seat 151 and the lower joint seat 162 are locked to each other and cannot rotate relative to each other.

In other embodiments, the position at which the ratchet 213 releases one of the first locking ratchet 211 and the second locking ratchet 212 may be changed, that is, the following may occur: when the ratchet 213 moves inside the lower joint seat 162, the ratchet 213 is separated from the first locking ratchet 211, and at this time the upper joint seat 151 and the lower joint seat 162 can rotate relative to each other.

It is apparent that the second locking mechanism 21 achieves a different engagement state from the first locking ratchet 211 and the second locking ratchet 212 mainly by the movement of the ratchet 213, and thus a mechanism or structure is required to facilitate the user's operation of the ratchet 213. In one embodiment, the second locking mechanism 21 further comprises: a lock shaft 214 installed in the first rotary joint 2, the lock shaft 214 for driving the ratchet 213; the locking shaft 214 is further provided with a driving bevel 2141, and the driving bevel 2141 is used for driving the ratchet gear 213 to move on the locking shaft 214 along the axial direction when the locking shaft 214 rotates.

The locking shaft 214 itself can rotate within the first rotary joint 2, so that the movement of the ratchet wheel 213 is effected by its own drive ramp 2141. Correspondingly, the driven inclined surface 2131 may be correspondingly disposed on the ratchet wheel 213 to cooperate with the driving inclined surface 2141. The function of the drive ramp 2141 is to convert rotation of the drive shaft itself into movement of the ratchet gear 213 in the axial direction of the lock shaft 214.

The movement of the ratchet 213 is achieved by rotation of the locking shaft 214, which rotation of the locking shaft 214 is ultimately still required to be achieved by the user applying force. May be provided as a member extending to the outside of the first rotary joint 2 for the convenience of the user, and also may refer to fig. 9 to disclose an embodiment in which both ends of the locking shaft 214 are respectively connected with a first driving disc 215 by force; the first drive disc 215 is force-coupled to the first traction cable 2151.

The first traction cable 2151 applies a force to the first drive disc 215, thereby driving rotation of the locking shaft 214. In principle, the first driving disk 215 is free to rotate in the first rotary joint 2 without interfering with the first locking ratchet 211 and the second locking ratchet 212. Referring to the design details in the figures, the diameter of the first drive disk 215 is smaller than the inner diameter of the first locking ratchet 211, so as to avoid interference. The first traction cable 2151 is mounted on a peripheral source of the first drive disc 215 and extends tangentially, and the tension in the first traction cable 2151 is translated into rotation of the lock shaft 214 by reversing the direction of the first drive disc 215. The first drive disc 215 is also provided with a first guide groove 2152 for restraining the first traction cable 2151. The first guide groove 2152 extends from a point of restraint of the first traction cable 2151 over the circumference of the first drive disc 215.

The first driving disc 215 and the locking shaft 214 may be provided as an integral structure, but the production cost and the assembly difficulty of the locking shaft 214 are correspondingly increased, so in an embodiment, the first driving disc 215 and the locking shaft 214 are separate structures, the first driving disc 215 is provided with a non-circular first driving groove 2153, and the corresponding end of the locking shaft 214 is a first driving portion 2142 corresponding to the shape of the first driving groove 2153.

The first drive disc 215 and the locking groove of the split mechanism can be easily produced and assembled, but there is a corresponding need to ensure the force-bearing performance during the transmission. The first drive groove 2153 is thus provided with a non-circular shape, enabling the torque of the first drive disc 215 to be transmitted to the lock shaft 214. Referring to the figures, the first driving groove 2153 is H-shaped, and it can be understood that two positioning protrusions are provided on a circular hole, thereby realizing the torque transfer. The first drive 2142 fits within the first drive groove 2153 and enables both the transmission of torque and the mutual positioning of the first drive disc 215 and the lock shaft 214.

The torque of the locking shaft 214 may also be used in other applications in a practical product. In one embodiment, a second driving disk 216 is force-connected to each end of the locking shaft 214; the second drive disk 216 is force coupled to a second traction cable 2161.

The second pull cable 2161 can be applied to other components to achieve synchronization results for other configurations during rotation of the lock shaft 214.

For example, in one embodiment, the top of the side rail 13 of each side frame 10 is slidably engaged with the hand rail by a sliding sleeve; a first locking mechanism 31 is arranged between the side support rod 13 and the sliding sleeve, and the first locking mechanism 31 limits the relative movement of the sliding sleeve relative to the side support rod 13 in a locking state;

the second traction cable 2161 is interlocked with the first locking mechanism 31.

In one embodiment, the first locking mechanism 31 includes:

a first locking pin 311 slidably mounted in the lower push rod 16 and having a first locking position protruding from the lower push rod 16 to engage with the slide sleeve;

the second pull cable 2161 is coupled to the first locking pin 311.

The above structure enables the second locking mechanism 21 to unlock the first locking mechanism 31 in an interlocking manner. The unlocking operation of a user is facilitated while the stable state of the frame 1 is ensured.

In the arrangement of the second driving disk 216, the second driving disk 216 and the locking shaft 214 may be provided as an integral structure, similar to the first driving disk 215, but the production cost and the assembly difficulty of the locking shaft 214 are correspondingly increased, so in an embodiment, the second driving disk 216 and the locking shaft 214 are provided as separate structures, the second driving disk 216 is provided with a non-circular second driving groove 2162, and the corresponding end of the locking shaft 214 is a second driving portion 2143 corresponding to the shape of the second driving groove 2162.

Referring to the drawings, the second driving groove 2162 is a female port, the second driving portion 2143 is a male port, and a radial protrusion is disposed on the outer circumferential surface of the second driving groove 2162 to transmit torque. In fact, it can be equivalently configured that the second driving groove 2162 is a male opening, the second driving portion 2143 is a female opening, and the effect is equivalent, and the first driving groove 2153 and the first driving portion 2142 are the same. In other aspects, such as the second guiding groove 2163, the second driving disc 216 is similar to the first driving disc 215 in principle and technical effect, and will not be described in detail here.

Referring to the above, it is apparent that the movement of the ratchet wheel 213 is driven by the lock shaft 214, but in most cases, the user needs to keep the lock ratchet, the first lock ratchet 211 and the second lock ratchet 212 in an engaged state, so that if the user needs to manually reset the ratchet wheel 213 every time, in the case of an erroneous operation such as forgetting by the user, the vehicle frame 1 may be unstable. To avoid this, in an embodiment, the second locking mechanism 21 further includes: one end of the return compression spring 217 is pressed against the ratchet wheel 213, and the other end is pressed against the upper joint seat 151 or the lower joint seat 162.

The return compression spring 217 can ensure that the ratchet wheel 213 is actively engaged with the first locking ratchet 211 and the second locking ratchet 212 in a free state, thereby preventing an accident.

In the specific arrangement of the restoring compression spring 217, in an embodiment, the upper joint seat 151 or the lower joint seat 162 is provided with a first limit slot 2171 for accommodating at least a part of the restoring compression spring 217, and the ratchet 213 is provided with a second limit slot 2172 for accommodating at least a part of the restoring compression spring 217.

The first limiting slot 2171 and the second limiting slot 2172 are symmetrically arranged, and can restrict the movement stroke of the reset pressure spring 217, so that the influence on the components in the first rotating joint 2 caused by the unstable space state of the reset pressure spring 217 is avoided. This design is very important because in the first joint, more components are integrated and the linkage of the first 31 and second 21 locking mechanisms.

In terms of the number of the return compression springs 217, in an embodiment, at least three return compression springs 217 are arranged in the circumferential direction of the ratchet 213, and the first limiting slot 2171 and the second limiting slot 2172 are arranged in groups and at least three groups are arranged.

Referring to the figure, the point of action of the single return compression spring 217 on the ratchet wheel 213 is at a distance from the direction of movement of the ratchet wheel 213 (axial direction of the lock shaft 214). Therefore, if the number of the reset compression springs 217 is too small, the ratchet wheel 213 may be deflected and stuck on the locking shaft 214 after being stressed, and the locking mechanism may further fail to work. Therefore, in the present embodiment, the risk that may occur as described above is avoided by increasing the number of return compression springs 217 and uniformly arranging them in the circumferential direction of the ratchet 213. Accordingly, in other embodiments, a plurality of return compression springs 217 and an equivalent compression spring wound around the lock shaft 214 may be provided, and the above-described problems may be avoided.

The operation of the frame 1 is explained below with reference to specific rods:

when a user needs to fold the frame 1, the user applies an acting force to the first traction rope 2151 through a certain trigger component, the first traction rope 2151 drives the first driving disc 215 and drives the locking shaft 214 to rotate, the ratchet wheel 213 is driven to move to release the first locking ratchet 211 or the second locking ratchet 212 through the driving inclined plane 2141 in the rotation process of the locking shaft 214, and at the moment, the first rotating joint 2 is unlocked; when the locking shaft 214 rotates, the second driving disc 216 synchronously rotates to drive the second traction cable 2161, the second traction cable 2161 drives the first locking pin 311 to exit from the first locking position, at this time, the sliding sleeve and the lower-hand push rod 16 are unlocked, the user pushes the upper-hand push rod 15 to the front of the frame 1, and the folding of the upper-hand push rod 15 and the lower-hand push rod 16 is completed; at this time, the frame 1 is in the state shown in fig. 10, and when the user drives the two side frames 10 to fold up with the rear foot rods 12 as fulcrums, the sliding sleeves slide on the lower hand push rods 16 to fold up the side frames 10, and when the frame is folded up in place, the frame 1 is in the first stage of folding up, that is, the state shown in fig. 11 and 12; when the user drives the two side frames 10 to close each other, the folding of the frame is completed, and the folding of the frame 1 is completed, and is in the second stage of folding, that is, the state shown in fig. 13 and 14.

The process of unfolding the frame 1 can be reversed, and the corresponding locking pin, the inclined plane for guiding and the reset elastic piece are arranged on the locking part, so that the automatic process of the locking process can be realized, and the detailed description is omitted.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features. When technical features in different embodiments are represented in the same drawing, it can be seen that the drawing also discloses a combination of the embodiments concerned.

The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the claims. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application.

Claims

1. The stroller comprises two side frames which are oppositely arranged and a plurality of connecting assemblies arranged between the two side frames, and is characterized in that the connecting assemblies comprise fixing rods which are arranged in pairs and cross rods of which the two ends are rotatably connected with the paired fixing rods, the side frames have an unfolding state and a folding state, connecting shafts between all the cross rods and the fixing rods are positioned on two parallel straight lines under the folding state of the side frames, and the side frames can be overturned around the connecting shafts in opposite directions and are close to planes determined by the cross rods;

both side frames include:

2. The stroller of claim 1, wherein the side frame further comprises a first locking mechanism disposed between the sliding sleeve and the handle bar.

3. The stroller of claim 2, wherein the first locking mechanism comprises a first locking pin slidably mounted within the handle bar having a first locking position that extends out of engagement of the handle bar with the sliding sleeve having a locking slot that engages the first locking pin.

4. The stroller of claim 2, wherein the first locking mechanism comprises:

5. The stroller of claim 1, wherein the handle comprises a top handle push rod and a bottom handle push rod which are movably engaged with each other, the sliding sleeve is sleeved on the bottom handle push rod, and in the unfolded state, the sliding sleeve abuts against the bottom handle push rod.

6. The stroller of claim 5, wherein the lower joint seat is disposed on a top of the lower push rod, the lower joint seat is larger than a rod diameter of the lower push rod, and the sliding sleeve abuts against the lower joint seat in the unfolded state.

7. The stroller of claim 6, wherein the upper push bar and the lower push bar are hingedly engaged via a first pivot joint;

the first rotary joint includes:

the upper joint seat is arranged at the bottom of the upper hand push rod;

the lower joint seat.

8. The stroller of claim 7, wherein the lower joint seat is in a plug-in fit with the lower handle bar.

9. The stroller of claim 8, wherein the upper push rod and the side support rod are in the same plane, the lower push rod is located inside the plane, the seat rod is rotatably connected with the side support rod through a swing rod, one end of the swing rod is fixedly connected with the middle of the seat rod, the other end of the swing rod is rotatably connected with the side support rod, and the swing rod is hidden inside the side support rod in the unfolded state of the frame.