CN215922294U - Pull rope unlocking mechanism for child cart - Google Patents

Abstract

The utility model provides a pull rope unlocking mechanism for a child stroller, which comprises a stroller body, wherein an unlocking rod piece is arranged on the stroller body and comprises an unlocking pipe, two movable sliding pieces are arranged in the unlocking pipe, and an elastic resetting piece is arranged between two adjacent ends of the two sliding pieces; a rotary adjusting piece is rotatably arranged on the unlocking pipe, and two ends of the rotary adjusting piece are slidably connected with the two sliding pieces, so that the rotary adjusting piece rotates to drive the sliding pieces to approach each other; a pull rope is arranged at one end, far away from the elastic reset piece, of the sliding piece, the pull rope penetrates through two ends of the unlocking pipe, and a connecting end is arranged at the other end of the pull rope; the rotating adjusting piece rotates and pulls the connecting end of the pull rope to enable the unlocking mechanism to be unlocked. A special unlocking rod piece is arranged for controlling the pull rope, the special unlocking rod piece is arranged at a position convenient to operate, and meanwhile the size of a vehicle body is not increased.

Description

Pull rope unlocking mechanism for child cart

Technical Field

The utility model belongs to the field of children's carts, and particularly relates to a pull rope unlocking mechanism for a children's cart.

Background

Most of the existing carts can be folded to be convenient to carry. In the existing structure, the seat, the hand push rod, the front support frame and the rear support frame cannot be unlocked or locked simultaneously, a plurality of unlocking mechanisms are needed, and the child stroller is complex in structure and complex to operate. The existing unlocking structure has multiple structures, and the unlocking mechanism unlocked by pulling the pull rope also has multiple structures. However, the conventional unlocking mechanism using the pull cord is often applied to the telescopic mechanism of the handspike. And the pulling pull rope needs to be specially arranged on the cart in structures such as a wane and the like, so that the operation is inconvenient and the misoperation is easy.

SUMMERY OF THE UTILITY MODEL

The utility model provides a pull rope unlocking mechanism for a child stroller.

The object of the utility model is achieved in the following way: the pull rope unlocking mechanism for the baby stroller comprises a stroller body, wherein a hand push rod and a seat are arranged on the stroller body, and a first support frame and a second support frame are respectively arranged at the lower ends of the stroller body; the vehicle body is provided with an unlocking rod piece, the unlocking rod piece comprises an unlocking pipe, two movable sliding pieces are arranged in the unlocking pipe, and an elastic reset piece is arranged between two adjacent ends of the two sliding pieces; a rotary adjusting piece is rotatably arranged on the unlocking pipe, and two ends of the rotary adjusting piece are in sliding connection with the two sliding pieces, so that the rotary adjusting piece rotates to drive the sliding pieces to approach or separate from each other; a pull rope is arranged at one end, far away from the elastic reset piece, of the sliding piece, the pull rope penetrates through two ends of the unlocking pipe, and a connecting end is arranged at the other end of the pull rope; at least two of the hand push rod, the first support frame, the second support frame and the seat are rotationally connected and switched between a locking state and a rotating state through an unlocking mechanism provided with a connecting end of the pull rope; the rotating adjusting piece rotates and pulls the connecting end of the pull rope to enable the unlocking mechanism to be unlocked.

Two ends of the unlocking pipe are arranged between two ends of the first support frame or between two ends of the second support frame; and a cavity corresponding to the pull rope is arranged on the first support frame or the second support frame.

The rotary adjusting piece is provided with two symmetrical sliding chutes, and the sliding chutes are spiral grooves or grooves with spiral surfaces on one side; the sliding piece is provided with a sliding rod with one end positioned in the sliding chute; the unlocking pipe is provided with a sliding groove with the length direction the same as that of the unlocking pipe; the sliding rod penetrates through the sliding groove to enter the sliding chute, and the rotary adjusting piece rotates to drive the sliding rod to move along the length direction of the sliding groove.

The rotary adjusting part is fixedly sleeved with a rotary outer pipe, a button groove is formed in the rotary outer pipe, an unlocking button capable of moving along the depth direction of the button groove is arranged in the button groove, button connecting shafts are arranged at two ends of the unlocking button, mounting pipes are respectively arranged at two ends of the unlocking pipe, which are located at the rotary sleeve, button unlocking grooves are formed in the mounting pipes, and the button connecting shafts are arranged in the button unlocking grooves; the button unlocking groove comprises an arc groove and a vertical groove arranged at one end point of the arc groove; a button return spring between the unlock button and the rotary adjustment member.

A pull rope fixing piece is arranged in the unlocking pipe, one end of the pull rope fixing piece is fixed to the pull rope, and the other end of the pull rope fixing piece is connected with one end, far away from the elastic reset piece, of the sliding piece.

At least two of the hand push rod, the first support frame, the second support frame and the seat are respectively provided with a rotating part; two adjacent rotating parts are connected in a rotating manner; the unlocking mechanism comprises a pull rope and locking pieces arranged in the accommodating grooves of the two adjacent rotating pieces; the inner wall of the accommodating groove of the rotating piece and the locking piece are positioned through the limiting block and the limiting groove; pulling the pull cord to move the locking member from a locked position in which it is simultaneously connected to two adjacent rotatable members to a rotated position in which it is connected to only one of the rotatable members; the locking member returns to the locking position by a resilient return mechanism.

The utility model has the beneficial effects that: through setting up rotation piece and unblock mechanism and making arbitrary two or three or four can rotate in handspike, first support frame, second support frame, the seat and connect, the pulling stay cord can realize a plurality of rotation pieces unblock simultaneously. The volume of the folded car body is small. A special unlocking rod piece is arranged for controlling the pull rope, the special unlocking rod piece is arranged at a position convenient to operate, and meanwhile the size of a vehicle body is not increased. The pull rope can be pulled to unlock the unlocking mechanism by rotating the rotary adjusting piece, and the unlocking mechanism can automatically reset after being loosened, so that the structure is simple and the operation is convenient. The button groove can prevent unlocking by misoperation.

Drawings

FIG. 1 is an overall perspective view of a stroller;

FIG. 2 is a view from another direction of FIG. 1;

FIG. 3 is a partially enlarged perspective view of the rotating member;

FIG. 4 is a cross-sectional view of the rotating member and the unlocking mechanism;

FIG. 5 is a schematic view of the rotatable member and the adjustment member engaged;

FIG. 6 is a schematic view of the rotating member engaged with the adjustment member;

FIG. 7 is a schematic view of an adjustment member;

FIG. 8 is a schematic view of a first support frame;

FIG. 9 is a schematic view of the unlock lever;

fig. 10 is a sectional view of the unlocking lever;

fig. 11 is an enlarged view of an intermediate portion of the unlocking lever (the outer tube is omitted from rotation);

FIG. 12 is another directional view of FIG. 11;

FIG. 13 is a cross-sectional view of the release lever;

fig. 14 is a schematic view of the pull cord with the release lever and the first support bracket inside (concealing the release tube and the outer stationary tube).

Wherein 1 is a hand lever, 2 is a rotary member, 20 is a receiving groove, 200 is a limit groove, 201 is a slant protrusion, 21 is a first rotary member, 210 is a first rotary shaft, 22 is a second rotary member, 220 is a second rotary shaft, 23 is a third rotary member, 230 is a third rotary shaft, 231 is a mounting shaft, 24 is a fourth rotary member, 25 is an adjusting member, 250 is a slant groove, 26 is a fixed member, 28 is an elastic return mechanism, 3 is a seat, 4 is a first support, 5 is a second support, 6 is a locking member, 60 is a connecting rod, 61 is a first locking member, 62 is a second locking member, 63 is a third locking member, 64 is a limit member, 7 is a pull cord, 70 is a connecting end, 8 is an unlocking lever, 80 is an unlocking tube, 800 is a slide groove, 81 is a slide member, 810 is a slide lever, 82 is an elastic return member, 83 is a rotary adjusting member, 830 is a slide chute, 84 is a rotary slide, 840 button groove, 85 unlocking button, 86 button connecting shaft, 87 mounting tube, 870 button unlocking groove, 88 outer fixing tube, 89 pull rope fixing piece.

Detailed Description

While the utility model will be described in detail and with reference to the drawings and specific examples, it is to be understood that the utility model is not limited to the precise construction and details shown and described herein, but is capable of numerous rearrangements and modifications as will now become apparent to those skilled in the art. In the present invention, unless otherwise specifically defined and limited, technical terms used herein shall have the ordinary meaning as understood by those skilled in the art to which the present invention pertains. The terms "connected", "fixed", "arranged" and the like are to be understood in a broad sense, and may be fixedly connected, detachably connected or integrated; can be directly connected or indirectly connected through an intermediate medium; either mechanically or electrically. Unless explicitly defined otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features, or indirectly contacting the first and second features through intervening media. Furthermore, a first feature may be "on" or "over" or "above" a second feature, and the like, may be directly on or obliquely above the second feature, or may simply mean that the first feature is at a higher level than the second feature. A first feature "under" or "beneath" a second feature may be directly under or obliquely under the first feature or may simply mean that the first feature is at a lesser level than the second feature. Relational terms such as first, second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

As shown in fig. 1 to 14, a folding mechanism of a stroller comprises a body, wherein the body comprises a push rod 1, a seat 3, a first support frame 4 and two second support frames 5, the lower ends of which are respectively provided with wheels. At least two of the hand push rod 1, the first support frame 4, the second support frame 5 and the seat 3 are respectively provided with a rotating part 2; two adjacent rotating pieces 2 are connected in a rotating manner; an unlocking mechanism which enables the rotating piece 2 to be switched between a locking state and a rotating state simultaneously; the unlocking mechanism comprises a pull rope 7 and a locking piece 6 arranged in the accommodating groove 20 of two adjacent rotating pieces 2; the inner wall of the accommodating groove 20 of the rotating member 2 and the locking member 6 are positioned by the limiting block 64 and the limiting groove 200; pulling the pulling rope 7 to make the locking piece 6 from the locking position connected with two adjacent rotating pieces 2 to the rotating position connected with only one rotating piece 2; the locking member 6 is returned to the locking position by the resilient return mechanism 28. The order of connecting the rotating member 2 is not necessarily the order of the handle bar 1, the first support frame 4, the second support frame 5, and the seat 3, and may be any arrangement that can be realized. The two ends of the rotating part 2 positioned in the middle position are respectively provided with an accommodating groove 20, and the rotating part 2 positioned in the two ends is provided with one accommodating groove 20; the inner wall of holding tank 20 sets up a plurality of spacing grooves 200 along the circumference, 6 surfaces of locking piece set up a plurality of stopper 64 along the circumference, stopper 64 with spacing groove 200 corresponds. The locking member 6 may be in the shape of a gear or spline shaft. Rotate 2 and release mechanism through setting up and make arbitrary two or three or four can rotate the connection in handspike 1, first support frame 4, second support frame 5, the seat 3, can the unblock realize folding, folding back automobile body is small, release mechanism is simple, convenient operation.

At least three of the hand push rod 1, the first support frame 4, the second support frame 5 and the seat 3 are respectively provided with a coaxial rotating part 2.

Wherein, the inclined plane protrusion 201 and the adjusting element 25 rotatably arranged in the receiving groove 20 are arranged in the receiving groove 20 of at least one rotating element 2, and the connecting end 70 of the pulling rope 7 is connected with the adjusting element 25 to rotate the adjusting element 25; the adjusting piece 25 is matched with the inclined plane protrusion 201 in the accommodating groove 20, so that the adjusting piece 25 rotates and moves axially; the locking piece 6 is arranged on the adjusting piece 25, so that the locking piece 6 synchronously moves axially; an elastic return mechanism 28 is arranged between the locking element 6 and the rotating element 2 provided with the adjusting element 25 or the rotating element 2 adjacent to the locking element. In a specific structure, the adjusting member 25 is provided with an inclined groove 250 corresponding to the inclined protrusion 201, and the inclined protrusion 201 is disposed in the inclined groove 250. The inclined plane protrusions 201 and the inclined plane grooves 250 are uniformly distributed along the circumference.

Alternatively, a locking member 6 is disposed in the receiving groove 20 of at least one of the rotation members 2, the connecting end 70 of the pulling rope 7 is connected to the locking member 6, and the pulling rope 7 is pulled to axially move the locking member 6.

Wherein, the pulling rope 7 may comprise two or three connecting ends 70 arranged in parallel; each of the coupling ends 70 pulls the corresponding locking member 6 to move from the corresponding position to the rotated position, respectively.

Alternatively, the pull rope 7 comprises two connecting ends 70 arranged in parallel; accommodating grooves 20 are respectively formed in two ends of one rotating piece 2 positioned in the middle, an inclined plane protrusion 201 and an adjusting piece 25 rotatably arranged in the accommodating groove 20 are arranged in one accommodating groove 20, and one connecting end 70 of the pull rope 7 is connected with the adjusting piece 25 so that the adjusting piece 25 rotates after the pull rope 7 is pulled; the adjusting piece 25 is matched with the inclined plane protrusion 201 in the accommodating groove 20, so that the adjusting piece 25 rotates and moves axially; the locking piece 6 is arranged on the adjusting piece 25, so that the locking piece 6 synchronously moves axially; a locking element 6 is arranged in the other accommodating groove 20 of the rotating element 2 at the middle position, the other connecting end 70 of the pull rope 7 is connected with the locking element 6, and the pulling of the pull rope 7 causes the locking element 6 to move axially.

Further, the locking member 6 directly connected to the connecting end 70 of the pulling rope 7 or the locking member 6 near the connecting end 70 of the pulling rope 7 is connected to the locking member 6 far from the connecting end 70 of the pulling rope 7 through the connecting rod 60 so as to bring the locking member 6 far from the connecting end 70 of the pulling rope 7 to synchronously move axially.

Or specifically, the left and right ends of the upper end of the first support frame 4 are respectively provided with a first rotating member 21, the left and right ends of the upper end of the second support frame 5 are provided with a second rotating member 22, the left and right ends of the lower end of the hand push rod 1 are respectively provided with a third rotating member 23, and the left and right sides of the rear end of the seat 3 are respectively provided with a fourth rotating member 24; the third rotating member 23 is rotatably connected with the first rotating member 21; the first rotating member 21 is rotatably connected with the second rotating member 22; the second rotating member 22 is rotatably connected to the fourth rotating member 24; a first locking piece 61 is arranged between the first rotating piece 21 and the third rotating piece 23; a second locking piece 62 is arranged between the first rotating piece 21 and the second rotating piece 22; a third locking piece 63 is arranged between the second rotating piece 22 and the fourth rotating piece 24; the pull rope 7 comprises two connecting ends 70 which are arranged in parallel; the two ends of the first rotating part 21 and the second rotating part 22 are respectively provided with an accommodating groove 20, and one ends of the third rotating part 23 and the fourth rotating part 24 are provided with the accommodating grooves 20; the inclined plane protrusion 201 and the adjusting piece 25 rotatably arranged in the accommodating groove 20 are arranged in the accommodating groove 20 of the first rotating piece 21 adjacent to the third rotating piece 23, and one connecting end 70 of the pull rope 7 is connected with the adjusting piece 25 so that the adjusting piece 25 rotates after the pull rope 7 is pulled; the adjusting piece 25 is matched with the inclined plane protrusion 201 in the accommodating groove 20, so that the adjusting piece 25 rotates and moves axially; the adjusting piece 25 is provided with a first locking piece 61, so that the first locking piece 61 moves axially synchronously; a second locking piece 62 is arranged in the other accommodating groove 20 of the first rotating piece 21, the other connecting end 70 of the pull rope 7 is connected with the second locking piece 62, and the pull rope 7 is pulled to axially move the second locking piece 62; the second locking piece 62 and the third locking piece 63 are fixed by a connecting rod 60, and the connecting rod 60 passes through the common bottom surface of the two accommodating grooves 20 of the second rotating piece 22; elastic return mechanisms 28 are respectively arranged between the first locking piece 61 and the third rotating piece 23, between the second locking piece 62 and the first rotating piece 21, and between the third locking piece 63 and the second rotating piece 22. The elastic return mechanism 28 is preferably a compression spring. The first rotating member 21 is provided with a fixing member 26 having a connecting end 70 penetrating through the pulling rope 7 in the receiving groove 20 adjacent to the second rotating member 22, and the fixing member 26 is provided with a pulling rope hole through which the pulling rope 7 is connected to the second locking member 62. The first rotating piece 21 is internally provided with a first rotating shaft 210 penetrating through the two accommodating grooves 20, and the second rotating piece 22 is internally provided with a second rotating shaft 220; shaft holes are arranged in the first rotating shaft 210 and the second rotating shaft 220; the fourth rotating member 24 is also provided with a shaft hole; the third rotating member 23 is provided with a third rotating shaft 230 having an outer diameter corresponding to the first rotating shaft 210, and a mounting shaft 231 passing through the shaft holes of the first rotating shaft 210, the second rotating shaft 220, and the fourth rotating member 24. The first rotating member 21, the second rotating member 22 and the fourth rotating member 24 are all sleeved on the mounting shaft 231. The adjusting member 25 and the first locking member 61 are provided on the first and third rotating shafts 210 and 230 and are axially movable. The second locking member 62 is provided on the first rotating shaft 210 and is axially movable. The third locking member 63 is provided on the second rotating shaft 220 and is axially movable. The first support 4 is preferably arranged at the rear of the pushchair, on which wheels are arranged the rear wheels. The second support 5 is preferably arranged at the front of the pushchair, the wheels arranged thereon being the front wheels. After the pull rope 7 is pulled, the hand push rod 1, the first support frame 4, the second support frame 5 and the seat 3 can be unlocked simultaneously, so that the stroller can be rotated and folded.

As shown in fig. 1 to 14, the pull rope unlocking mechanism for the stroller comprises a body, wherein a push rod 1 and a seat 3 are arranged on the body, and a first support frame 4 and a second support frame 4 of wheels are respectively arranged at the lower ends of the push rod and the seat; an unlocking rod piece 8 is arranged on the vehicle body, the unlocking rod piece 8 comprises an unlocking tube 80, two movable sliding pieces 81 are arranged in the unlocking tube 80, and an elastic resetting piece 82 is arranged between two adjacent ends of the two sliding pieces 81; a rotating adjusting piece 83 is rotatably arranged on the unlocking tube 80, and two ends of the rotating adjusting piece 83 are slidably connected with the two sliding pieces 81, so that the rotating adjusting piece 83 rotates to drive the sliding pieces 81 to approach or move away from each other; a pull rope 7 is arranged at one end of the sliding part 81 far away from the elastic resetting part 82, the pull rope 7 passes through two ends of the unlocking pipe 80, and a connecting end 70 is arranged at the other end of the pull rope 7; at least two of the hand push rod 1, the first support frame 4, the second support frame 5 and the seat 3 are rotationally connected and switched between a locking state and a rotating state through an unlocking mechanism provided with a connecting end 70 of the pull rope 7; the rotation adjusting member 83 rotates to pull the connecting end of the pulling rope 7 so that the unlocking mechanism is unlocked.

Preferably, both ends of the unlocking tube 80 are arranged between the left and right ends of the first support frame 4 or between the left and right ends of the second support frame 5; and a cavity corresponding to the pull rope 7 is arranged on the first support frame 4 or the second support frame 5. A special unlocking rod piece is arranged for controlling the pull rope 7 and is arranged at a position convenient to operate, and meanwhile, the size of the vehicle body is not increased. The pull rope 7 can be pulled to unlock the unlocking mechanism by rotating the rotary adjusting piece 83, and the unlocking mechanism can automatically reset after being loosened, and has simple structure and convenient operation.

Specifically, two symmetrical sliding chutes 830 are arranged on the rotary adjusting member 83, and the sliding chutes 830 are spiral grooves or grooves with spiral surfaces on one side; a sliding rod 810 with one end positioned in the sliding chute 830 is arranged on the sliding piece 81; the unlocking tube 80 is provided with a sliding groove 800 the length direction of which is the same as that of the unlocking tube 80; the sliding rod 810 passes through the sliding groove 800 and enters the sliding chute 830, and the rotation adjusting member 83 rotates to drive the sliding rod 810 to move along the length direction of the sliding groove 800.

The rotating adjusting piece 83 is fixedly sleeved with the rotating outer tube 84, a button groove 840 is arranged on the rotating outer tube 84, an unlocking button 85 which can move along the depth direction of the button groove 840 is arranged in the button groove 840, button connecting shafts 86 are arranged at two ends of the unlocking button 85, mounting tubes 87 are respectively arranged at two ends of the rotating outer tube 84 on the unlocking tube 80, button unlocking grooves 870 are arranged on the mounting tubes 87, and the button connecting shafts 86 are arranged in the button unlocking grooves 870; the button unlocking groove 870 comprises an arc groove and a vertical groove arranged at one end of the arc groove; a button return spring between the unlocking button 85 and the rotation adjusting member 83. The return spring is not shown. When the unlock button 85 is pressed without an external force, the button return spring makes the button connecting shaft 86 of the unlock button 85 located in the vertical groove of the button unlock groove 870, and at this time, the rotation adjuster 83 and the rotation outer tube 84 cannot rotate. The rotation adjusting member 83 can be rotated only when the unlock button 85 is pressed and the unlock button 85 reaches the arc groove. The angle of rotation of the rotation adjusting member 83 corresponds to the angle of the arc groove. The unlocking button groove 870 is arranged to prevent unlocking by misoperation, so that the stroller has better safety performance.

An outer fixing tube 88 sleeved outside the unlocking tube 80 is arranged at one end, far away from the unlocking button 85, of the mounting tube 87, and the other end of the outer fixing tube 88 is connected with the vehicle body. A pull rope fixing piece 89 is arranged in the unlocking tube 80, one end of the pull rope fixing piece 89 is fixed on the pull rope 7, and the other end of the pull rope fixing piece 89 is connected with one end of the sliding piece 81 far away from the elastic resetting piece 82. The cord fastener 89 and the sliding member 81 may be directly connected or indirectly connected through another component.

At least two of the hand push rod 1, the first support frame 4, the second support frame 5 and the seat 3 are rotatably connected in a way that at least two of the hand push rod 1, the first support frame 4, the second support frame 5 and the seat 3 are respectively provided with a rotating part 2; two adjacent rotating pieces 2 are connected in a rotating manner; the unlocking mechanism comprises a pull rope 7 and a locking piece 6 arranged in the accommodating groove 20 of two adjacent rotating pieces 2; the inner wall of the accommodating groove 20 of the rotating member 2 and the locking member 6 are positioned by the limiting block 64 and the limiting groove 200; pulling the pulling rope 7 to make the locking piece 6 from the locking position connected with two adjacent rotating pieces 2 to the rotating position connected with only one rotating piece 2; the locking member 6 is returned to the locking position by the resilient return mechanism 28. The remaining structures have been described in detail above and are not repeated.

In the specific implementation: when the child stroller needs to be folded, the unlocking button 85 is pressed downwards to unlock the unlocking button 85, the unlocking button 85 and the outer rotating tube 84 are rotated, and the two sliding pieces 81 are close to each other to drive the pull ropes 7 to be close to each other. The two cord connection ends 70 located in the rotatable member 2 rotate the adjustment member 25 and the second locking member 62 axially, respectively. The simultaneous axial movement of the adjustment member 25 causes the first locking member 61 to move axially. The second locking member 62 moves the third locking member 63 axially via the connecting rod 60. So that all the locking members 6 are moved from a locking position intermediate the two turning members 2 to an unlocking position in which they are connected to only one turning member 2. At this time, the hand push rod 1, the first support frame 4, the second support frame 5 and the seat 3 can be mutually rotated and folded. After the folding is completed, the unlocking button 85 is released, the two sliding pieces 81 return to the original positions under the action of the elastic resetting piece, and the unlocking button 85, the rotating outer tube 84 and the rotating adjusting piece 83 are driven to return to the original positions. The connection end of the pull rope 7 is no longer in a tightened state, and the elastic reset mechanism 28 drives all the rotating pieces 2 to return to the locking position.

It should be noted that terms such as "central," "lateral," "longitudinal," "length," "width," "thickness," "height," "front," "rear," "left," "right," "up," "down," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," "circumferential," "clockwise," "counterclockwise," and the like used in the description are used for indicating the orientation or positional relationship indicated based on the orientation or positional relationship shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated. And therefore should not be construed as limiting the scope of the utility model.

The above description is only for the preferred embodiment of the present invention, not for all embodiments, and the scope of the present invention is not limited thereto. 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. Where combinations of features are mutually inconsistent or impractical, such combinations should not be considered as being absent and not within the scope of the claimed invention. It should be noted that those skilled in the art and any person skilled in the art can equally substitute or change the technical solution of the present invention and the inventive concept thereof, and make several changes and improvements without departing from the spirit of the present invention and the general inventive concept, which should also be considered as the protection scope of the present invention.

Claims (6)

1. The pull rope unlocking mechanism for the baby stroller comprises a stroller body, wherein a hand push rod and a seat are arranged on the stroller body, and a first support frame and a second support frame are respectively arranged at the lower ends of the stroller body; the method is characterized in that: the vehicle body is provided with an unlocking rod piece, the unlocking rod piece comprises an unlocking pipe, two movable sliding pieces are arranged in the unlocking pipe, and an elastic reset piece is arranged between two adjacent ends of the two sliding pieces; a rotary adjusting piece is rotatably arranged on the unlocking pipe, and two ends of the rotary adjusting piece are in sliding connection with the two sliding pieces, so that the rotary adjusting piece rotates to drive the sliding pieces to approach or separate from each other; a pull rope is arranged at one end, far away from the elastic reset piece, of the sliding piece, the pull rope penetrates through two ends of the unlocking pipe, and a connecting end is arranged at the other end of the pull rope; at least two of the hand push rod, the first support frame, the second support frame and the seat are rotationally connected and switched between a locking state and a rotating state through an unlocking mechanism provided with a connecting end of the pull rope; the rotating adjusting piece rotates and pulls the connecting end of the pull rope to enable the unlocking mechanism to be unlocked.

2. The pull-cord unlocking mechanism for a stroller according to claim 1, characterized in that: two ends of the unlocking pipe are arranged between two ends of the first support frame or between two ends of the second support frame; and a cavity corresponding to the pull rope is arranged on the first support frame or the second support frame.

3. The pull-cord unlocking mechanism for a stroller according to claim 1, characterized in that: the rotary adjusting piece is provided with two symmetrical sliding chutes, and the sliding chutes are spiral grooves or grooves with spiral surfaces on one side; the sliding piece is provided with a sliding rod with one end positioned in the sliding chute; the unlocking pipe is provided with a sliding groove with the length direction the same as that of the unlocking pipe; the sliding rod penetrates through the sliding groove to enter the sliding chute, and the rotary adjusting piece rotates to drive the sliding rod to move along the length direction of the sliding groove.

4. The pull-cord unlocking mechanism for a stroller according to claim 3, characterized in that: the rotary adjusting part is fixedly sleeved with a rotary outer pipe, a button groove is formed in the rotary outer pipe, an unlocking button capable of moving along the depth direction of the button groove is arranged in the button groove, button connecting shafts are arranged at two ends of the unlocking button, mounting pipes are respectively arranged at two ends of the rotary outer pipe on the unlocking pipe, button unlocking grooves are formed in the mounting pipes, and the button connecting shafts are arranged in the button unlocking grooves; the button unlocking groove comprises an arc groove and a vertical groove arranged at one end point of the arc groove; a button return spring between the unlock button and the rotary adjustment member.

5. The pull-cord unlocking mechanism for a stroller according to claim 1, characterized in that: a pull rope fixing piece is arranged in the unlocking pipe, one end of the pull rope fixing piece is fixed to the pull rope, and the other end of the pull rope fixing piece is connected with one end, far away from the elastic reset piece, of the sliding piece.

6. The pull-cord unlocking mechanism for a stroller according to any one of claims 1 to 5, characterized in that: at least two of the hand push rod, the first support frame, the second support frame and the seat are respectively provided with a rotating part; two adjacent rotating parts are connected in a rotating manner; the unlocking mechanism comprises a pull rope and locking pieces arranged in the accommodating grooves of the two adjacent rotating pieces; the inner wall of the accommodating groove of the rotating piece and the locking piece are positioned through the limiting block and the limiting groove; pulling the pull cord to move the locking member from a locked position in which it is simultaneously connected to two adjacent rotatable members to a rotated position in which it is connected to only one of the rotatable members; the locking member returns to the locking position by a resilient return mechanism.

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