CN111361624B - Linked unlocking stroller - Google Patents

Abstract

The application discloses a children handcart capable of being unlocked in a linkage mode, which comprises two side frames and a connecting assembly, wherein the two side frames comprise a front foot rod and a rear foot rod, a hand push rod, a side support rod, an upper hand push rod and a lower hand push rod are hinged with each other through a locking shaft, the locking shaft is driven by a first traction rope to lock or unlock the upper hand push rod and the lower hand push rod, a first locking pin is further linked on the locking shaft, and the first locking pin acts between the side support rod and the lower hand push rod. According to the child cart disclosed by the application, the first locking mechanism and the second locking mechanism are linked to unlock, so that the operation steps of a user in unlocking operation can be reduced while the locking safety is ensured, and comfortable use feeling is provided for the user.

Description

Child cart with linkage unlocking function

Technical Field

The application relates to the field of children products, in particular to a linkage unlocking child trolley.

Background

The frame of current bassinet mostly is collapsible structure, like chinese patent document that publication No. 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, after unlocking frame locking mechanical system, left side support and right side support can fold respectively, then rotates around the link with left side support and right side support respectively relatively and draw close. However, various disadvantages, such as complicated unlocking operation, exist. In the field, in order to ensure safety, two locks are often required to be designed, and a user needs to unlock for many times to realize that the frame enters a folding state from an unfolding state, so that inconvenience is caused.

Disclosure of Invention

In order to solve the technical problems, the application discloses a children handcart with linkage unlocking, which comprises two oppositely arranged side frames and a plurality of connecting components arranged between the two side frames, wherein the two side frames comprise:

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 support rod is hinged with the top of the rear foot rod, and the top of the side support rod is slidably arranged on the lower hand push rod;

the upper hand push rod and the lower hand push rod are mutually hinged through a locking shaft, the locking shaft is driven by a first traction rope to lock or release the upper hand push rod and the lower hand push rod, a first locking pin is also linked on the locking shaft, and the first locking pin acts on between the side support rod and the lower hand push rod.

Optionally, the side support rod is in sliding fit with the lower push rod through a sliding sleeve, the first locking mechanism is arranged between the sliding sleeve and the lower push rod and comprises a first locking pin which is slidably arranged in the lower push rod and provided with a first locking position protruding out of the lower push rod to be clamped with the sliding sleeve, and the sliding sleeve is provided with a locking groove matched with the first locking pin.

Optionally, the first locking mechanism includes:

The first locking pin;

a first driving member for driving the first locking pin into or out of the first locking position;

the first driving piece comprises a first driving block, a movable area for accommodating the first locking pin is arranged in the first driving block, and a second traction rope extending out of the movable area is linked on the first locking pin.

Optionally, an upper joint seat is arranged on the upper hand push rod, a lower joint seat is arranged on the lower hand push rod, the upper joint seat is in hinged fit with the upper joint seat through a first rotating joint, and the second locking mechanism is arranged in the first rotating joint.

Optionally, the second locking mechanism includes:

a first locking ratchet arranged inside the upper joint seat;

The second locking ratchet is arranged in the lower joint seat;

and the ratchet wheel is arranged inside the first rotating joint and can move along the rotating axis of the first rotating joint, and the ratchet wheel can be meshed with or released from the first locking ratchet wheel and the second locking ratchet wheel at different positions.

Optionally, the second locking mechanism further comprises a locking shaft arranged in the first rotating joint, wherein the locking shaft is used for driving the ratchet wheel, and a driving inclined plane is further arranged on the locking shaft and used for driving the ratchet wheel to axially move on the locking shaft when the locking shaft rotates.

Optionally, the second locking mechanism further comprises a reset pressure spring, one end of the reset pressure spring is propped against the ratchet wheel, the other end of the reset pressure spring is propped against the upper joint seat or the lower joint seat, at least three reset pressure springs are arranged on the periphery of the ratchet wheel, and the first limiting slots and the second limiting slots are correspondingly arranged in groups and at least three groups are arranged.

Optionally, one end of the locking shaft is connected with a first driving disc in a stressed manner, the first driving disc is connected with the first traction rope in a stressed manner, the other end of the locking shaft is connected with a second driving disc in a stressed manner, and the second driving disc is connected with the second traction rope in a stressed manner.

Optionally, the first driving disc and the locking shaft are of split structures, a non-circular first driving groove is formed in the first driving disc, and the end part corresponding to the locking shaft is a first driving part corresponding to the first driving groove.

Optionally, the second driving disc and the locking shaft are of a split structure, a non-circular second driving groove is formed in the second driving disc, and the end part corresponding to the locking shaft is a second driving part corresponding to the shape of the second driving groove.

The child cart disclosed by the application can provide comfortable riding space for children in an unfolding state, can reduce operation steps of a user in unlocking operation while ensuring locking safety through linkage unlocking of the first locking mechanism and the second locking mechanism, provides comfortable use feeling for the user, and provides the whole appearance as regular and small as possible in a folding state, thereby being convenient to store and transport.

Drawings

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

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

Fig. 3 is a schematic view of the child stroller shown in fig. 1 after the explosion of the armrest portion.

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

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

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

Fig. 7 is a schematic diagram of a second locking mechanism assembly.

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

Fig. 9 is a schematic diagram of the second locking mechanism.

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 another view of the stroller of fig. 11.

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

Fig. 14 is another view of the stroller of fig. 13.

Fig. 15 is a simplified schematic structural view of the intermediate folded state of the stroller.

FIG. 16 is a schematic view showing the structure of three side frames, wherein a is example 1, b, example 2, and example 3.

Reference numerals in the drawings are described as follows:

1. The bicycle comprises a bicycle frame, 10, a side frame, 11, a front foot rod, 111, a front wheel, 12, a rear foot rod, 121, a rear wheel, 122, a brake pedal, 123, a rear wheel seat, 13, a side support rod, 131, a seat rod, 132, a swing rod, 14, a connecting assembly, 141, a fixing rod, 142, a cross rod, 143, a first connecting assembly, 144, a second connecting assembly, 1441, a second avoidance area, 145, a third connecting assembly, 1451, a third avoidance area, 146, a fourth connecting assembly, 15, an upper push rod, 151, an upper joint seat, 16, a lower push rod, 161, an extension section, 162, a lower joint seat, 17, a linkage rod, 171 and a driving connecting rod;

2. First rotary joint, 21, second locking mechanism, 211, first locking ratchet, 212, second locking ratchet, 213, ratchet, 2131, passive bevel, 214, locking shaft, 2141, driving bevel, 2142, first driving part, 2143, second driving part, 215, first driving disc, 2151, first traction cable, 2152, first guide groove, 2153, first driving groove, 216, second driving disc, 2161, second traction cable, 2162, second driving groove, 2163, second guide groove, 217, reset pressure spring, 2171, first limit slot, 2172, second limit slot;

3. Sliding sleeve, 31, first locking mechanism, 311, first locking pin, 312, first driving piece, 3121, first driving block, 3122, active zone.

Detailed Description

The following description of the embodiments of the present application will be made more apparent and fully hereinafter with reference to the accompanying drawings, in which some, but not all embodiments of the application are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

1-4, The baby stroller comprises two side frames 10 which are arranged oppositely and a plurality of connecting assemblies 14 which are arranged between the two side frames 10, wherein the two side frames 10 respectively comprise a front foot rod 11, a rear foot rod 12, a hand push rod and a side support rod 13, the tops of the front foot rod 11 and the rear foot rod 12 are hinged with each other, the hand push rod comprises an upper hand push rod 15 and a lower hand push rod 16 which are movably connected, the bottom of the lower hand push rod is hinged with the middle part of the rear foot rod 12, the bottom of the side support rod 13 is hinged with the top of the rear foot rod 12, and the top of the side support rod is slidably arranged on the lower hand push rod 16.

The front foot bar 11 and the rear foot bar 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 the user stands behind the stroller and applies a pulling force to the push bar to drive the stroller to move backward, the front foot bar 11 is located at the rear side in the traveling direction of the rear foot bar 12.

The front wheels 111 are mounted on the bottom of the front foot bar 11, the front wheels 111 have a front tread in the unfolded state of the side frames 10, the rear wheels 121 are mounted on the bottom of the rear foot bar 12, and the rear wheels 121 have a rear tread in the unfolded state of the side frames 10. In general, the front wheels 111 are universal wheels, the rear wheels are directional wheels 121, and the front wheel track is the wheel track of the two front wheels when the cart is pushed forward.

As shown in figure 1, a front wheel seat is arranged at the bottom of a front wheel rod 11, a rear wheel seat 123 is arranged at the bottom of a rear foot rod 12, the front wheel seat is connected with the front foot rod 11 through a vertical connecting shaft and can freely rotate 360 degrees around the connecting shaft, the rear wheel seat 123 is fixedly inserted into the bottom end of the rear foot rod 12, and the rear wheel 121 and the rear foot rod 12 are basically positioned in the same plane. It is of course also possible to provide a cross bar between the two rear foot bars, the two ends of which are each provided with a rear wheel, but this design results in a certain distance of the rear wheel 121 from the rear foot bar 12, which results in a larger folded frame 1.

The side frame 10 has a folded state and an unfolded state, when folded, the hand push rod is rotated to be close to the rear foot rod 12, the top of the side support rod 13 slides along the hand push rod, and meanwhile, the front foot rod 11 is driven to be rotated towards the rear foot rod 12. To achieve the linkage of the forefoot lever, in some embodiments, as shown in fig. 16a, the bottom of the hand push rod is extended, a linkage lever 17 is disposed between the extension section 161 and the forefoot lever 11, and two ends of the linkage lever 17 are respectively connected with the extension section 161 and the forefoot lever 11 in a rotating manner.

The linkage manner for realizing the front foot bar 11 is not limited to the above structure, and as shown in 16b, one end of the linkage bar 17 is rotatably connected with the front foot bar 11, and the other end is rotatably connected with the middle part of the lower push bar 16. As shown in fig. 16c, the front foot bar 11 and the rear foot bar 12 are provided with two folding bars, and one end of the driving link 171 is rotatably connected to the two folding bars, and the other end is rotatably connected to the side rail 13.

In some embodiments, as shown in fig. 1 and 3, four connection assemblies are provided between the side frames, namely, a first connection assembly 143 provided between the seat bars 131 of the side frames 10, a second connection assembly 144 provided between the rear foot bars 12 of the side frames 10, a third connection assembly 145 provided between the front foot bars 11 of the side frames 10, and a fourth connection assembly 146 provided between the push bars of the side frames 10.

Because the fourth connecting component is arranged between the hand push rods, in order to prevent the appearance from being abrupt, the top of the upper hand push rod 15 is warped upwards to form a fixed rod 142, and is connected through a cross rod 142 to form the fourth connecting component, and the diameters of the fixed rod and the cross rod are basically consistent with the diameter of the upper hand push rod 15.

In theory, the frame stability can be ensured only by arranging the connecting components among the front foot bar 11, the rear foot bar 12 and the hand push bar, but in order to improve the stability, the first connecting component 143 is arranged between the two bars.

To achieve the secondary folding of the frame 1, in some embodiments, each of the connection assemblies includes a fixing bar 141 arranged in pairs and a cross bar 142 having both ends rotatably connected to the fixing bar. In the folded state of the side frames 10, as shown in fig. 15, all the cross bars 142 are on the same plane, the rotation axes between them and the fixing bars 141 are on two straight lines A0 and B0, and the two side frames can be turned around the rotation axes A1-A4 and the rotation axes B1-B4, respectively, so as to approach the plane defined by the cross bars, thereby reducing the width of the frame. The side frames should be as close to the plane defined by the rails as possible and the spacing between the side frames should be as small as possible to minimize the size of the frame.

Of course, in some children's carts, the volume is not reduced by secondary folding, and the connecting assembly may be a straight connecting rod, and two ends of the straight connecting rod are directly and fixedly connected with corresponding rods of the side frame 10.

In some embodiments, a unidirectional rotation limiting mechanism is provided at the connection of 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 fixing rod relative to the cross rod 142. There are a variety of settings in the actual product. For example, in fig. 14, two ends of the cross bar 142 of the third connecting assembly 145 are provided with openings matched with the fixing bars 141, one side of the end of each fixing bar is provided with a bump, and when the fixing bars 141 move to the limit positions relative to the cross bar 142, the bumps abut against the bottoms of the openings.

Referring to fig. 4, the cross bar 142 of the second connecting assembly 144 is provided with a second avoidance area 1441, and at least a portion of the fixing rod 141 of the second connecting assembly 144 is received or not received in the second avoidance area 1441 during the process of turning the two side frames 10 in the folded state. The second avoidance area 1441 is mainly used for providing more movable space for the fixing rod 141, so that the movement stroke of the two side frames 10 approaching to each other can be optimized, the function of the avoidance area can be realized through the special-shaped fixing rod 141, and the mutual interference of the fixing rod 141 and the cross rod 142 is avoided through the extension of the fixing rod 141.

The cross bar 142 of the third connecting assembly 145 is provided with a third avoidance area 1451, and at least a portion of the fixing rod 141 of the third connecting assembly 145 is received in the third avoidance area 1451 or not during the process that the two side frames 10 are mutually closed in the folded state.

In order to minimize the volume of the cart, as shown in fig. 1 and 2, in some embodiments, the push bar includes an upper push bar 15 and a lower push bar 16 rotatably connected, the side support bar 13 is slidably engaged with the lower push bar 16, and in the folded state, the rotational joint between the upper push bar 15 and the lower push bar 16 reaches the lowest position of the rear wheel 121. Obviously, the hand push rod can also be a telescopic rod, and the effect of shortening the hand push rod can be realized. Further, in the frame-unfolded state, the upper push rod 15 and the lower push rod 16 are arranged along the same direction, so that force can be effectively transmitted to the front frame when pushing.

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

Whereas the rear foot bar 12 and the front foot bar 11 are in the same plane, and the front wheel 111 and the rear wheel 121 are mounted to the bottom of the front foot bar 11 and the rear foot bar 12, respectively, it is possible that the front wheel 111 and the rear wheel 121 interfere when folded, and in some embodiments, the bottoms of the two front foot bars 11 are curved inwardly in a defined plane such that the front wheel 111 and the rear wheel 121 are staggered, i.e., the spacing of the front wheels is smaller than the spacing of the rear wheels. But the magnitude of the inward bending of the forefoot bar 11 must not be excessive, at least the front wheel 111 must not pass over the connection point of the cross bar 142 and the fixing bar 141.

In order to flatten the side rails 13 and the front leg rail 11 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 the two ends of the T-shaped connector, respectively. Meanwhile, in order to increase the attractiveness of the stroller, the T-shaped connecting piece, the front foot rod 11 and the side support rods 13 are positioned on the same straight line.

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

In some embodiments, the side armrests 13 are of a special-shaped structure with a narrow bottom and a wide top, as shown in fig. 3, the side armrests are divided into two sections which are mutually spliced, wherein the upper sections are of arc-shaped structures, the lower sections and the front foot bars 11 are in the same straight line, and hands of a child sitting conveniently lean on the side armrests 13.

The top of the side rail 13 is slidably mounted on the push rod in a variety of configurations, and in some embodiments, the push rod is provided with a sliding sleeve 3, and the top of the side rail 13 is rotatably connected to the sliding sleeve 3. Of course, a sliding groove can be formed in the hand pushing rod, a sliding pin matched with the sliding groove is arranged at the top of the side supporting rod 13, and the sliding pin can rotate in the sliding groove or the opposite side supporting rod 13 can rotate.

The traditional children's barrow is all made up of cloth cover and frame, and the frame is the skeleton that supports the shallow, and the cloth cover is mainly used for forming seat and back on the frame. In some embodiments, both side frames 10 are provided with seat bars 131, and when the seat portion of the cloth cover is bound to the seat bars 131, a seat can be formed. In each side frame 10, the rear end of the seat bar 131 is hinged to the lower push bar 16, the middle part is hinged to the side rail 13, and the front end extends beyond the side rail 13 and back to the lower push bar 16. The front end of the seat post 131 is extended mainly to provide a wider seating space, thereby providing a comfortable seating sensation.

As described above, for the compactness of the folding structure, the upper push rod 15 and the side rail 13 are located in the same plane, and the lower push rod 16 is located inside the plane, and if the seat bar 131 is directly hinged to the side rail, an excessive gap between the two results. If the seat bar 131 is forcibly moved closer to the side rail 13, the seat bar 131 is caused to tilt outwardly, which interferes with folding. In some embodiments, the seat bar 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 bar 131, and one end is rotatably connected to the side rail 13, and in the unfolded state of the frame, the swing link 132 is hidden inside the side rail 13.

To maintain the stroller in the deployed state, the side frame 10 further includes a first locking mechanism. The first locking mechanism locks the relative positions of the rod pieces and keeps 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 push rod. The first locking mechanism 31 includes a first locking pin 311, the first locking pin 311 is slidably mounted in the push rod, and has a first locking position (as shown in fig. 6) for detecting engagement of the push rod with the slide sleeve, and the slide sleeve 3 has a locking groove for engaging with the first locking pin 311.

When the first locking pin 311 is withdrawn from the first locking position, the sliding sleeve 3 can slide freely relative to the hand push rod, so that the moving stroke of the change of the space state of the side frame 10 is released.

The movement of the first locking pin 311 may be manually triggered by a user, 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 arranged in the hand push rod and is provided with a first locking position for detecting the clamping of the hand push rod and the sliding sleeve;

the first driving member 312 is used 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, for example, a member extending to the outside of the lever member is convenient for a user to operate, etc., and in an embodiment disclosed with reference to fig. 6, the first driving member 312 includes a first driving block 3121, an active area 3122 for accommodating the first locking pin 311 is provided in the first driving block 3121, and a traction cable (in the illustrated embodiment, the traction cable is hereinafter referred to as a second traction cable 2161) extending to the outside of the active area 3122 is linked to the first locking pin 311.

In the field, the setting of haulage cable can bring nimble overall arrangement, conveniently sets up the part of unblock in the position that the user easily operated, brings intuitionistic, convenient operation impression when guaranteeing unblock and locking action stability. The present embodiment is characterized in that the first driving block 3121 is provided with the movable area 3122 accommodating the first locking pin 311, thereby improving the stability of the driving of the first locking pin 311 by the first driving block 3121. In the illustrated embodiment, the first driving block 3121 provides only guidance of the first locking pin 311, and the actual driving force of the first locking pin 311 is implemented by a traction cable, in other embodiments, driving of the first locking pin 311 may be implemented by driving the first driving block 3121 by a traction cable, and the corresponding first driving member 312 may further include a first locking elastic member (not shown) to maintain 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 in the first locking position.

Referring to fig. 4 to 9, the push rod comprises an upper push rod 15 and a lower push rod 16 which are in movable fit, the upper push rod 15 and the lower push rod 16 are in hinged fit through a first rotary joint 2, and a second locking mechanism 21 for locking the position relationship of the upper push rod 15 and the lower push rod 16 is arranged in the first rotary joint 2.

In one embodiment, the first rotary joint 2 comprises:

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

a lower joint seat 162 at the top of the lower push rod 16;

both the upper joint seat 151 and the lower joint seat 162 enclose a first rotary joint 2.

When the second locking mechanism 21 is in the locking state, the two parts of the first rotating joint 2 cannot rotate relatively, and when the second locking mechanism 21 is in the unlocking state, the two parts of the first rotating joint 2 can rotate freely, so that the upper push rod 15 and the lower push rod 16 are folded mutually.

The first rotary joint 2 is formed by surrounding the upper joint seat 151 and the lower joint seat 162, which can form a larger joint than other modes, so as to provide installation and adapting space for other structures or mechanisms, and avoid the generation of a gap between the two clamping hands.

In some embodiments, the lower joint seat 162 is in a plug-in fit with the lower push rod 16, 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, referring 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 wheel 213 installed inside the first rotary joint 2 and movable along the rotation axis of the first rotary joint 2, the ratchet wheel 213 being capable of engaging or releasing the first locking ratchet 211 and the second locking ratchet 212 at different positions.

The ratchet 213 is movable along the rotation axis of the first rotary joint 2, and when the ratchet 213 moves inside the upper joint seat 151, the ratchet 213 is separated from the second locking ratchet 212, and the upper joint seat 151 and the lower joint seat 162 are rotatable with each other, and when the ratchet 213 moves between the upper joint seat 151 and the lower joint seat 162, the ratchet 213 is simultaneously engaged with the first locking ratchet 211 and the second locking ratchet 212, and when the ratchet 213 moves between the upper joint seat 151 and the lower joint seat 162, the upper joint seat 151 and the lower joint seat 162 are locked with each other and cannot rotate with each other.

In other embodiments, the position where the ratchet 213 releases one of the first and second locking ratchets 211, 212 may be changed, i.e., it may occur that the ratchet 213 is separated from the first locking ratchet 211 when the ratchet 213 moves inside the lower joint seat 162, and the upper and lower joint seats 151, 162 can be rotated with 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 locking shaft 214 mounted in the first rotary joint 2, wherein the locking shaft 214 is used for driving the ratchet wheel 213, and a driving inclined plane 2141 is further arranged on the locking shaft 214, and the driving inclined plane 2141 is used for driving the ratchet wheel 213 to axially move on the locking shaft 214 when the locking shaft 214 rotates.

The locking shaft 214 itself can rotate in the first rotary joint 2, so that the movement of the ratchet 213 is achieved by its own drive ramp 2141. Correspondingly, the ratchet 213 may be provided with a passive bevel 2131 to match the driving bevel 2141. The drive ramp 2141 functions to translate rotation of the drive shaft itself into movement of the ratchet wheel 213 in the axial direction of the lock shaft 214.

Movement of the ratchet 213 is accomplished by rotation of the lock shaft 214, which ultimately is accomplished by the application of force by the user. The locking shaft 214 may be provided as a part extending to the outside of the first rotating joint 2 for user operation, or in an embodiment disclosed with reference to fig. 9, two ends of the locking shaft 214 are respectively connected with a first driving disc 215 in a force-bearing manner, and the first driving disc 215 is connected with the first traction cable 2151 in a force-bearing manner.

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 drive plate 215 is rotatable in the first rotary joint 2 without interfering with the first lock ratchet 211 and the second lock ratchet 212. Referring to the design detail in the drawing, the diameter of the first driving disk 215 is smaller than the inner diameter of the first locking ratchet 211, thereby avoiding interference. The first traction cable 2151 is mounted on the outer Zhou Yuan of the first drive disc 215 and extends tangentially, the tension of the first traction cable 2151 being converted into rotation of the locking 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 the binding point of the first traction cable 2151 on the peripheral surface of the first drive disc 215.

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

The first drive plate 215 and the locking groove of the split mechanism can be produced and assembled conveniently, but the corresponding need is to ensure the force-bearing performance during transmission. The first driving groove 2153 is thus provided non-circular, enabling torque of the first driving disk 215 to be transmitted to the locking shaft 214. Referring to the drawings, the first driving groove 2153 is H-shaped, and it can be understood that two positioning protrusions are provided on the circular hole, thereby achieving torque transfer. The first driving portion 2142 is fitted in the first driving groove 2153, and can realize both torque transmission and mutual positioning of the first driving disk 215 and the lock shaft 214.

Other applications of the torque of the lock shaft 214 may also be implemented in actual products. In one embodiment, the two ends of the locking shaft 214 are respectively connected with a second driving disc 216 in a force-bearing manner, and the second driving disc 216 is connected with the second traction cable 2161 in a force-bearing manner.

The second traction cable 2161 can be applied to other components to achieve other structural synchronization results during rotation of the locking shaft 214.

For example, in one embodiment, the top of the side rail 13 of each side frame 10 is slidably engaged with the push rod via a sliding sleeve, a first locking mechanism 31 is provided between the side rail 13 and the sliding sleeve, the first locking mechanism 31 restricting relative movement of the sliding sleeve with respect to the side rail 13 in a locked state;

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

In one embodiment, the first locking mechanism 31 includes:

The first locking pin 311 is slidably arranged in the lower hand push rod 16 and is provided with a first locking position which protrudes out of the lower hand push rod 16 and is clamped with the sliding sleeve;

The second traction cable 2161 is linked to the first locking pin 311.

The above structure enables the second lock mechanism 21 to be interlocked with the unlocking of the first lock mechanism 31. The stable state of the frame 1 is ensured, and the unlocking operation of a user is convenient.

In the arrangement of the second driving disc 216, the second driving disc 216 and the locking shaft 214 may be integrally formed as a single piece, which may increase the production cost and assembly difficulty of the locking shaft 214, so that in an embodiment, the second driving disc 216 and the locking shaft 214 are separately formed, the second driving disc 216 is provided with a non-circular second driving groove 2162, and the locking shaft 214 has a second driving portion 2143 corresponding to the shape of the second driving groove 2162.

As shown in the drawing, the second driving groove 2162 is a female port, the second driving portion 2143 is a male port, and a radial protrusion is provided on the outer peripheral surface of the second driving groove 2162 to transmit torque. In practice, the second driving groove 2162 may be equivalently provided as a male port, the second driving portion 2143 as a female port, and the first driving groove 2153 and the first driving portion 2142 may be similarly provided. Other aspects, such as the second guide groove 2163, the second driving disk 216 is similar to the first driving disk 215 in terms of its arrangement principle and technical effect, and will not be repeated here.

Referring to the above, it is apparent that the movement of the ratchet 213 is driven by the locking shaft 214, but most of the time, the user needs to maintain the locking ratchet, the first locking ratchet 211 and the second locking ratchet 212 in the engaged state, so that if the user needs to manually reset the ratchet 213 each time, the unstable condition of the vehicle frame 1 may occur in case the user forgets to wait for the misoperation. To avoid this, in one embodiment, the second locking mechanism 21 further includes a return compression spring 217 having one end abutting against the ratchet 213 and the other end abutting against the upper joint seat 151 or the lower joint seat 162.

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

The reset compression spring 217 is specifically disposed, in one 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 portion of the reset compression spring 217, and the ratchet 213 is provided with a second limit slot 2172 for accommodating at least a portion of the reset compression spring 217.

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

In terms of the number of the restoring compression springs 217, in an embodiment, the restoring compression springs 217 are provided with at least three in the circumferential direction of the ratchet 213, and the first limit slot 2171 and the second limit slot 2172 are correspondingly provided in groups and are provided with at least three groups.

As shown in the drawing, the point of action of the single return pressure spring 217 exerting a force on the ratchet wheel 213 is located at a distance from the direction of movement of the ratchet wheel 213 (the axial direction of the lock shaft 214). Therefore, too few return compression springs 217 may cause the ratchet 213 to deflect and jam on the locking shaft 214 after being stressed, and further cause the locking mechanism to fail. In this embodiment, therefore, the risk that may occur above is avoided by increasing the number of return compression springs 217 and uniformly disposing in the circumferential direction of the ratchet wheel 213. Accordingly, in other embodiments, the plurality of return compression springs 217 and the compression spring wound around the lock shaft 214 may be equivalently provided, so that the above-described problem can be avoided.

The operation of the frame 1 is explained below in connection with specific bars:

When a user needs to fold the frame 1, the user applies a force to the first traction cable 2151 through a certain trigger component, the first traction cable 2151 drives the first driving disc 215 and drives the locking shaft 214 to rotate, the ratchet 213 moves to release the first locking ratchet 211 or the second locking ratchet 212 through the driving inclined plane 2141 in the process of rotating the locking shaft 214, at the moment, the first rotating joint 2 is unlocked, the second driving disc 216 synchronously rotates to drive the second traction cable 2161 while the locking shaft 214 rotates, the second traction cable 2161 drives the first locking pin 311 to withdraw from the first locking position, at the moment, the sliding sleeve and the lower push rod 16 are unlocked, the user pushes the upper push rod 15 to the front of the frame 1 to complete folding of the upper push rod 15 and the lower push rod 16, at the moment, the frame 1 is in the state of fig. 10, the user slides on the lower push rod 16 to realize folding of the side frames 10 in the process of driving the rear foot rod 12, and after the frame is folded in place, the frame 1 is in the first stage of folding, namely, the state of folding of fig. 11 and the side frames 12 is in the first stage of folding, at the moment, the user is in the state of folding of driving the side frames 10, namely, the folding of the two frames 1 is in the second stage of folding, namely, the folding state of the frame 14 is completed, and the frame is in the state of folding stage 13, and is shown in the folding state.

The process of unfolding the frame 1 is reverse, and the corresponding locking pins, the inclined planes for guiding and the reset elastic pieces are arranged on the locking parts, so that the automatic process of the locking process can be realized, and the description is omitted.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description. When technical features of different embodiments are embodied in the same drawing, the drawing can be regarded as a combination of the embodiments concerned also being disclosed at the same time.

The above examples illustrate only a few embodiments of the application, which are described in detail and are not to be construed as limiting the scope of the claims. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the application, which are all within the scope of the application.

Claims (6)

1. The children's barrow with linkage unlocking comprises two side frames which are oppositely arranged and a plurality of connecting components which are arranged between the two side frames,

The utility model is characterized in that both side frames comprise:

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, the bottom of the lower hand push rod is hinged with the middle part of the rear foot rod, the bottom of the lower hand push rod is prolonged to form an extension section, the extension section is linked with the front foot rod, an upper joint seat is arranged on the upper hand push rod, a lower joint seat is arranged on the lower hand push rod, and the upper joint seat is hinged and matched with the upper joint seat through a first rotary joint;

the bottom of the side support rod is hinged with the top of the rear foot rod, and the top of the side support rod is slidably arranged on the lower hand push rod through a sliding sleeve;

The rear end of the seat rod is hinged with the lower hand pushing rod, the middle part of the seat rod is hinged with the side supporting rod, and the front end of the seat rod extends back to the lower hand pushing rod beyond the side supporting rod;

the first locking mechanism is arranged between the sliding sleeve and the lower hand push rod and comprises a first locking pin and a first driving piece, wherein the first locking pin is slidably arranged in the lower hand push rod and provided with a first locking position protruding out of the lower hand push rod to be clamped with the sliding sleeve, the sliding sleeve is provided with a locking groove matched with the first locking pin, the first driving piece is used for driving the first locking pin to enter or exit the first locking position, the first driving piece comprises a first driving block, a movable area for accommodating the first locking pin is arranged in the first driving block, and the first locking pin is linked with a second traction rope extending out of the movable area;

The second locking mechanism is arranged in the first rotating joint and comprises a first locking ratchet, a second locking ratchet, a ratchet wheel and a locking shaft, wherein the first locking ratchet is arranged in the upper joint seat; the ratchet wheel is arranged in the first rotating joint and can move along the rotating axis of the first rotating joint, and the ratchet wheel can be meshed with or released from the first locking ratchet wheel and the second locking ratchet wheel at different positions;

The upper hand push rod and the side support rod are positioned in the same plane, the lower hand push rod is positioned at the inner side of the plane, the locking shaft is driven by a first traction rope to lock or release the upper hand push rod and the lower hand push rod, and the locking shaft is also connected with the first locking pin;

The connecting components comprise a second connecting component arranged between the rear foot rods of the two side frames, a third connecting component arranged between the front foot rods of the two side frames and a fourth connecting component arranged between the hand pushing rods of the two side frames, each connecting component comprises fixing rods arranged in pairs and transverse rods with two ends in rotary connection with the fixing rods, all the transverse rods are positioned on the same plane and are collinear with the rotary shafts between the fixing rods when the side frames are in a folded state, and the two side frames can be turned around the rotary shafts in opposite directions to be close to the plane determined by the transverse rods.

2. The stroller of claim 1, wherein the locking shaft is further provided with a drive ramp for driving the ratchet wheel axially on the locking shaft when the locking shaft is rotated.

3. The stroller of claim 2, wherein the second locking mechanism further comprises a reset compression spring, one end of the reset compression spring is propped against the ratchet wheel, the other end of the reset compression spring is propped against the upper joint seat or the lower joint seat, at least three reset compression springs are arranged in the circumferential direction of the ratchet wheel, and the first limit slot and the second limit slot are correspondingly arranged in groups and are provided with at least three groups.

4. The stroller of claim 2, wherein the locking shaft is connected to a first drive plate at one end and connected to the first traction cable at the other end, and a second drive plate is connected to the second traction cable at the other end.

5. The stroller of claim 4, wherein the first drive plate and the locking shaft are of a split structure, a non-circular first drive groove is formed in the first drive plate, and a first drive portion corresponding to the first drive groove is formed at the end portion corresponding to the locking shaft.

6. The stroller of claim 5, wherein the second drive plate and the locking shaft are of a split structure, a non-circular second drive groove is formed in the second drive plate, and the end portion of the locking shaft corresponding to the second drive groove is a second drive portion corresponding to the shape of the second drive groove.