Linkage folding structure of stroller

Abstract

The invention relates to the field of baby strollers, and particularly discloses a linkage folding structure of a baby stroller, which comprises a push handle joint, a front foot joint and a rear foot joint which are coaxially arranged, a linkage piece is arranged between the push handle joint and the front foot joint, the push handle joint and the front foot joint synchronously rotate through the linkage piece, and the rotation directions are opposite. The push handle joint and the front foot joint rotate relative to the rear foot joint, a locking structure is arranged on one side of the push handle joint and comprises a locking rod, first locking grooves are formed in the push handle joint and the front foot joint, a second locking groove is formed in the rear foot joint, and the locking rod sequentially penetrates through the two first locking grooves and then extends into the second locking groove of the rear foot joint. According to the folding bicycle frame, the appearance is simple, the structure is compact, transmission force loss is small, folding is easy, the joints are arranged in a stacked mode, the assembling technology is greatly simplified, the locking effect is good, and the stability and strength of the bicycle frame are improved.

Description

Technical Field

[0001] The invention relates to the field of child strollers, in particular to a linkage folding structure of a child stroller. Background Art

[0002] In order to reduce the space occupied when not in use, most baby strollers are designed to be foldable, so that the baby strollers can be stored together when stored, reducing the volume and facilitating storage. However, in the existing folding structure, multiple external connecting rods are often used to rotate to achieve linkage and locking, which makes the frame complicated and the locking effect unsatisfactory, and the frame has poor stability and low strength. Therefore, the present application proposes a linkage folding structure of a baby stroller to solve the above problems. Summary of the invention

[0003] In view of the existing problems, the present invention provides a linkage folding structure of a child stroller, which can effectively solve the problems raised in the background technology.

[0004] To solve the above problems, the present invention adopts the following technical solutions:

[0005] A linkage folding structure for a child stroller, comprising a central axis rod and a push handle joint, a front foot joint and a rear foot joint stacked and coaxially arranged in sequence, the central axis rod passes through the center holes of the push handle joint, the front foot joint and the rear foot joint in sequence, a linkage plate is provided between the push handle joint and the front foot joint, the push handle joint rotates synchronously with the front foot joint through the linkage plate and the rotation direction is opposite, and the push handle joint and the front foot joint both rotate relative to the rear foot joint, a locking structure is provided on the side of the push handle joint away from the front foot joint, the locking structure comprises a locking rod, and a first locking groove is provided on the push handle joint and the front foot joint, a second locking groove is provided in the rear foot joint, the locking rod passes through the first locking grooves on the push handle joint and the front foot joint in sequence and then extends into the second locking groove of the rear foot joint, the locking rod slides out of the first locking groove to unlock the push handle joint.

[0006] As a further solution of the present invention: the side of the push handle joint away from the front foot joint is clamped with an outer cover, the side of the rear foot joint away from the front foot joint is fixedly connected with an inner cover, and the inner cover is provided with a socket for installing the front handrail.

[0007] As a further scheme of the present invention: a first cylinder and a second cylinder are respectively provided on both sides of the same side of the linkage plate, a first arc groove, a first straight groove and a fourth arc groove are provided on the front foot joint, a first positioning hole and a second arc groove are provided on the rear foot joint, the first cylinder in the linkage plate passes through the first arc groove and is rotatably connected to the first positioning hole, the second cylinder passes through the first straight groove and extends into the second arc groove, a second straight groove is provided on the linkage plate, a third cylinder is provided on the push handle joint, the third cylinder passes through the second straight groove and extends into the fourth arc groove, a rotating force arm is formed at the center of the third cylinder and the push handle joint, when the push handle joint rotates, the third cylinder generates a friction force arm in the second straight groove of the linkage plate, driving the linkage plate to rotate around the first cylinder, the rotation direction of the front foot joint of the linkage plate is opposite, the second cylinder in the linkage plate generates a friction force arm in the first straight groove, driving the front foot joint and the linkage plate to rotate synchronously in the same direction.

[0008] As a further solution of the present invention: the linkage plate is provided with a fifth arcuate groove passing through the center, the first straight groove is connected to the middle of the fifth arcuate groove, the central axis rod passes through the fifth arcuate groove, and when the linkage plate rotates, the central axis rod moves relatively in the fifth arcuate groove.

[0009] As a further solution of the present invention: it also includes a short shaft rod, a sixth arc groove is arranged on the push handle joint, a limiting concave arc groove is arranged on the linkage plate, and a fixing hole is arranged on the rear foot joint. The short shaft rod passes through the sixth arc groove, the limiting concave arc groove and the first arc groove and is fixedly connected with the fixing hole, which is used to limit the rotation direction of the push handle joint and the front foot joint relative to the rear foot joint.

[0010] As a further solution of the present invention: a seventh arc groove is provided on the push handle joint and the forefoot joint, the seventh arc groove is connected to the first locking groove, and the length of the first locking groove is greater than the width of the seventh arc groove, the seventh arc groove on the push handle joint and the seventh arc groove on the forefoot joint are respectively located on both sides of the first locking groove, and the locking structure includes a sliding structure, and the sliding structure drives the locking rod to slide from the first locking groove to the seventh arc groove to unlock the push handle joint.

[0011] As a further solution of the present invention: the sliding structure includes a wire pull ring and a locking seat, the wire pull ring is arranged between the locking seat and the push handle joint and slides along the push handle joint, the locking rod is fixed on the locking seat, the locking seat is provided with a sliding groove, a spring seat is provided in the sliding groove, the spring seat and the locking seat are connected by a reset spring, the central axis rod passes through the spring seat, a limiting protrusion is provided on one side of the locking seat, the limiting protrusion extends into the wire pull ring, and when the wire pull ring slides, the locking seat is driven to slide by the limiting protrusion, so that the locking rod slides from the first locking groove to the seventh arc groove, and after the wire pull ring is released, the reset spring acts to reset the locking seat.

[0012] As a further solution of the present invention: the limiting protrusion is an arc-shaped strip, and the part where the wire pull ring contacts the limiting protrusion is also an arc-shaped structure and is concentric with the arc-shaped strip, so that the limiting protrusion can perform linear motion and circular rotation motion.

[0013] As a further solution of the present invention: a clamping groove is provided at the end of the locking rod, and after the locking rod passes through the second locking groove, a clamping ring passes through the clamping groove to axially position the locking rod.

[0014] As a further solution of the present invention: the side surfaces of the push handle joint are respectively provided with limiting convex strips on both sides of the pull wire ring.

[0015] Compared with the prior art, the beneficial effects of the present invention are: the present invention adopts built-in linkage plates and locking structures to link and lock the push handle joints, front foot joints and rear foot joints, has a simple appearance, compact structure, less force transmission loss, easy folding, and a stacked arrangement between the joints, which greatly simplifies the assembly process, has a good locking effect, and improves the stability and strength of the frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional schematic diagram of the overall structure of a linkage folding structure of a child stroller;

[0017] Figure 2 A schematic side view of a linkage folding structure of a baby stroller with the outer cover removed;

[0018] Figure 3 A schematic diagram of a structural splitting view of a linkage folding structure of a child stroller;

[0019] Figure 4 A schematic diagram of a split structure of a linkage folding structure of a child stroller from another perspective;

[0020] Figure 5 It is a schematic diagram of a handlebar joint structure in a linkage folding structure of a baby stroller;

[0021] Figure 6 A schematic diagram of a front foot joint structure in a linkage folding structure of a child stroller;

[0022] Figure 7 It is a schematic diagram of the rear foot joint structure in a linkage folding structure of a child stroller;

[0023] Figure 8 It is a schematic diagram of a linkage piece structure in a linkage folding structure of a child stroller;

[0024] Fig. 9 A three-dimensional schematic diagram of a locking structure in a linkage folding structure of a child stroller from one perspective;

[0025] Fig.10 It is a stereoscopic schematic diagram of a locking structure in a linkage folding structure of a child stroller from another perspective;

[0026] Fig.11 A schematic diagram of a split locking structure in a linkage folding structure of a baby stroller;

[0027] Fig.12 A schematic diagram of the connection of only steel plates in a push handle joint, a front foot joint and a rear foot joint in a linkage folding structure of a baby stroller;

[0028] Fig.13 A schematic diagram of the connection of only a steel plate between a handlebar joint and a front foot joint in a linkage folding structure of a baby stroller;

[0029] Fig.14 The present invention is a schematic diagram of the connection between the steel plate and the linkage plate in the handle joint in the linkage folding structure of a baby stroller.

[0030] In the figure: 1. push handle joint; 11. third cylinder; 12. sixth arc groove; 13. limiting convex strip; 14. seventh arc groove; 2. front foot joint; 21. first arc groove; 22. first straight groove; 23. fourth arc groove; 24. seventh arc groove; 3. rear foot joint; 31. first positioning hole; 32. second arc groove; 33. fixing hole; 34. second locking groove; 4. linkage plate; 41. first cylinder; 42. second cylinder; 43. second straight groove; 44. fifth arc groove; 45. limiting concave arc groove; 5. middle shaft rod; 6. locking structure; 61. locking rod; 62. wire ring; 63. locking seat; 64. sliding groove; 65. spring seat; 66. reset spring; 67. limiting convex protrusion; 7. first locking groove; 8. outer cover; 9. inner cover; 91. jack; 10. short shaft rod. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] Combination Figures 1 to 14The present embodiment is described. The present embodiment provides a linkage folding structure of a child stroller, which includes a central axis rod 5 and a push handle joint 1, a front foot joint 2 and a rear foot joint 3 which are stacked and coaxially arranged in sequence. The central axis rod 5 passes through the center holes of the push handle joint 1, the front foot joint 2 and the rear foot joint 3 in sequence. A linkage plate 4 is provided between the push handle joint 1 and the front foot joint 2. The push handle joint 1 rotates synchronously with the front foot joint 2 through the linkage plate 4 and the rotation directions are opposite. The push handle joint 1 and the front foot joint 2 both rotate relative to the rear foot joint 3. A locking structure 6 is provided on the side of the push handle joint 1 away from the front foot joint 2. The locking structure 6 includes a locking rod 61. A first locking groove 7 matching the locking structure 6 is provided on the push handle joint 1 and the front foot joint 2. A second locking groove 34 is provided in the rear foot joint 3. The locking rod 61 passes through the first locking groove 7 on the push handle joint 1 and the front foot joint 2 in sequence and then extends into the second locking groove 34 of the rear foot joint 3. The locking rod slides out of the first locking groove 7 to unlock the push handle joint 1.

[0033] Furthermore, an outer cover 8 is clamped on the side of the handlebar joint 1 away from the front foot joint 2, and an inner cover 9 is fixedly connected to the side of the rear foot joint 3 away from the front foot joint 2. The inner cover 9 is provided with a socket 91 for installing the front handrail rod.

[0034] Furthermore, a first cylinder 41 and a second cylinder 42 are respectively provided on both sides of the same side of the linkage plate 4, the forefoot joint 2 is provided with a first arc groove 21, a first straight groove 22 and a fourth arc groove 23, the rear foot joint 3 is provided with a first positioning hole 31 and a second arc groove 32, the first cylinder 41 in the linkage plate 4 passes through the first arc groove 21 and is rotatably connected to the first positioning hole 31, the second cylinder 42 passes through the first straight groove 22 and extends into the second arc groove 32, the linkage plate 4 is provided with a second straight groove 43, the push handle joint 1 is provided with a third cylinder 11, the third cylinder 11 passes through the second straight groove 43 and extends into the fourth arc groove 23, the third cylinder 11 and the center of the push handle joint 1 form a rotation arm, when the push handle joint 1 rotates, the third cylinder 11 generates a friction arm in the second straight groove 43 of the linkage plate 4, driving the linkage plate 4 to rotate around the first cylinder 41, the rotation direction of the front foot joint 2 of the linkage plate 4 is opposite, the second cylinder 42 in the linkage plate 4 generates a friction arm in the first straight groove 22, driving the front foot joint 2 and the linkage plate 4 to rotate synchronously in the same direction.

[0035] Furthermore, a fifth arc groove 44 passing through the center is provided on the linkage piece 4, the first straight groove 22 is connected to the middle of the fifth arc groove 44, the central axis rod 5 passes through the fifth arc groove 44, and when the linkage piece 4 rotates, the central axis rod 5 moves relatively in the fifth arc groove 44.

[0036] Furthermore, it also includes a short shaft rod 10, a sixth arc groove 12 is provided on the push handle joint 1, a limiting concave arc groove 45 is provided on the linkage plate 4, and a fixing hole 33 is provided on the rear foot joint 3. The short shaft rod 10 passes through the sixth arc groove 12, the limiting concave arc groove 45, and the first arc groove 21 and is fixedly connected to the fixing hole 33, which is used to limit the rotation direction of the push handle joint 1 and the front foot joint 2 relative to the rear foot joint 3.

[0037] Furthermore, the push handle joint 1 and the front foot joint 2 are both provided with a seventh arc groove 14 (24), the seventh arc groove 14 (24) is connected to the first locking groove 7, and the length of the first locking groove 7 is greater than the width of the seventh arc groove 14 (24), the seventh arc groove 14 on the push handle joint 1 and the seventh arc groove 24 on the front foot joint 2 are respectively located on both sides of the first locking groove 7, and the rear foot joint 3 is provided with a second locking groove 34 matching the first locking groove 7, the locking structure 6 includes a sliding structure, the locking rod 61 passes through the first locking groove 7 on the push handle joint 1 and the front foot joint 2 in turn, and then extends into the second locking groove 34 of the rear foot joint 3 to lock the push handle joint 1, and the sliding structure drives the locking rod 61 to slide from the first locking groove 7 to the seventh arc groove 14 (24), thereby unlocking the push handle joint 1.

[0038] Furthermore, the sliding structure includes a pull-wire ring 62 and a locking seat 63. The pull-wire ring 62 is arranged between the locking seat and the push handle joint 1 and slides along the push handle joint 1. The upper end of the pull-wire ring 62 is fixedly connected to a rope, and the rope 63 is fixedly connected to a car-closing button on the push handle assembly. When the car-closing button is pressed, the pull-wire ring 62 slides upward, and the locking rod 61 is fixed on the locking seat 63. A sliding groove 64 is provided on the locking seat 63, and a spring seat 65 is provided in the sliding groove 64. The spring seat 65 and the locking seat 63 are connected by a reset spring 66. The central axis rod 5 passes through the spring seat 65. A limiting protrusion 67 is provided on one side of the locking seat 63. The limiting protrusion 67 extends into the pull-wire ring 62. When the pull-wire ring 62 slides, the locking seat 63 is driven to slide by the limiting protrusion 67, so that the locking rod 61 slides from the first locking groove 7 to the seventh arc groove 14 (24). After the pull-wire ring 62 is released, the reset spring 66 acts on the locking seat 63 to reset.

[0039] Furthermore, the limiting protrusion 67 is an arc-shaped strip, and the part where the wire pull ring 62 contacts the limiting protrusion 67 is also an arc-shaped structure and is concentric with the arc-shaped strip, so that the limiting protrusion 67 can perform linear motion and circular rotational motion. A clamping groove is provided at the end of the locking rod 61. After the locking rod 61 passes through the second locking groove 34, the clamping ring passes through the clamping groove to axially position the locking rod 61. Limiting protrusions 13 are respectively provided on both sides of the wire pull ring 62 on the side of the push handle joint 1, which are used to limit the two sides of the wire pull ring 62 to ensure that the wire pull ring 62 slides in a straight direction.

[0040] It is worth mentioning that the first arc groove 21, the second arc groove 32, the third arc groove, the fourth arc groove 23, the sixth arc groove 12, and the seventh arc groove 14 (24) in the present application are all arc grooves and are coaxially arranged with the central axis rod 5, and the end ends of the above-mentioned arc grooves are used for limiting, respectively, the child stroller is in the unfolded or folded state.

[0041] Furthermore, the handlebar joint 1, the front foot joint 2 and the rear foot joint 3 are all wrapped with built-in steel plates and plastic shaped parts, and the arc grooves, holes, etc. on the steel plates and the outer plastic shaped parts are correspondingly arranged and have the same size. The setting of the plastic shaped parts improves the aesthetics on the one hand, and facilitates the connection with the frame on the other.

[0042] The working principle of the present invention is as follows: the wire pull ring 62 is pulled upward, driving the locking seat 63 to move upward to compress the return spring 66, and the lock top seat drives the locking rod 61 to slide from the first locking groove 7 to the seventh arc groove 14 (24), unlocking the push handle joint 1, and the push handle joint 1 rotates toward the rear foot joint 3, and at the same time drives the front foot joint 2 to rotate toward the rear foot joint 3 through the linkage plate 4, so as to realize joint folding. When unfolding, the push handle joint 1 rotates away from the rear foot joint 3, and at the same time drives the front foot joint 2 to rotate away from the rear foot joint 3. After unfolding, the return spring 66 elastically pushes the locking seat 63 to move downward, so that the locking rod 61 slides into the first locking groove 7, completing the joint unfolding and locking. The built-in linkage plate 4 and the locking structure 6 are used to link and lock the push handle joint 1, the front foot joint 2 and the rear foot joint 3. The appearance is simple, the structure is compact, the transmission force loss is small, and the folding is easy. The joints are arranged in layers, which greatly simplifies the assembly process, has a good locking effect, and improves the stability and strength of the frame.

[0043] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or apparatus.

[0044] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A linkage folding structure for a child stroller, characterized in that: It includes a central axis rod and a push handle joint, a front foot joint and a rear foot joint which are stacked and coaxially arranged in sequence, the central axis rod passes through the central holes of the push handle joint, the front foot joint and the rear foot joint in sequence, a linkage plate is provided between the push handle joint and the front foot joint, the push handle joint rotates synchronously with the front foot joint through the linkage plate and the rotation direction is opposite, and the push handle joint and the front foot joint both rotate relative to the rear foot joint, a locking structure is provided on the side of the push handle joint away from the front foot joint, and locking grooves matching the locking structure are provided on the push handle joint and the front foot joint, and the locking structure slides out of the locking groove to unlock the push handle joint.

2. The linkage folding structure of a child stroller according to claim 1, characterized in that: An outer cover is clamped on the side of the push handle joint away from the front foot joint, and an inner cover is fixedly connected to the side of the rear foot joint away from the front foot joint. A socket is provided on the inner cover for installing a front handrail rod.

3. The linkage folding structure of a child stroller according to claim 1, characterized in that: The first cylinder and the second cylinder are respectively provided on both sides of the same side of the linkage plate, the first arc groove, the first straight groove and the fourth arc groove are provided on the front foot joint, the first positioning hole and the second arc groove are provided on the rear foot joint, the first cylinder in the linkage plate passes through the first arc groove and is rotatably connected with the first positioning hole, the second cylinder passes through the first straight groove and extends into the second arc groove, the linkage plate is provided with a second straight groove, and the third cylinder is provided on the push handle joint, the third cylinder passes through the second straight groove and extends into the fourth arc groove, and a rotating force arm is formed at the center of the push handle joint. When the push handle joint rotates, the third cylinder generates a friction force arm in the second straight groove of the linkage plate, driving the linkage plate to rotate around the first cylinder, and the rotation direction of the front foot joint of the linkage plate is opposite, and the second cylinder in the linkage plate generates a friction force arm in the first straight groove, driving the front foot joint and the linkage plate to rotate synchronously in the same direction.

4. The linkage folding structure of a child stroller according to claim 3, characterized in that: The linkage piece is provided with a fifth arcuate groove passing through the center, the first straight groove is connected with the middle of the fifth arcuate groove, the central axis rod passes through the fifth arcuate groove, and when the linkage piece rotates, the central axis rod moves relatively in the fifth arcuate groove.

5. The linkage folding structure of a child stroller according to claim 4, characterized in that: It also includes a short axis rod, a sixth arc groove is arranged on the push handle joint, a limiting concave arc groove is arranged on the linkage plate, and a fixing hole is arranged on the rear foot joint. The short axis rod passes through the sixth arc groove, the limiting concave arc groove and the first arc groove and is fixedly connected to the fixing hole, so as to limit the rotation direction of the push handle joint and the front foot joint relative to the rear foot joint.

6. The linkage folding structure of a child stroller according to claim 1, characterized in that: The push handle joint and the front foot joint are both provided with a seventh arc groove, the seventh arc groove is connected with the locking groove, and the length of the locking groove is greater than the width of the seventh arc groove, the seventh arc groove on the push handle joint and the seventh arc groove on the front foot joint are respectively located on both sides of the locking groove, and a fixing groove matching the locking groove is provided in the rear foot joint, the locking structure includes a sliding structure and a locking rod, the locking rod passes through the locking grooves on the push handle joint and the front foot joint in turn and then extends into the fixing groove of the rear foot joint to lock the push handle joint, and the sliding structure drives the locking rod to slide from the locking groove to the seventh arc groove to unlock the push handle joint.

7. The linkage folding structure of a child stroller according to claim 6, characterized in that: The sliding structure includes a wire pull ring and a locking seat. The wire pull ring is arranged between the locking seat and the push handle joint and slides along the push handle joint. The locking rod is fixed on the locking seat. A sliding groove is provided on the locking seat. A spring seat is provided in the sliding groove. The spring seat and the locking seat are connected by a reset spring. The central axis rod passes through the spring seat. A limiting protrusion is provided on one side of the locking seat. The limiting protrusion extends into the wire pull ring. When the wire pull ring slides, the locking seat is driven to slide through the limiting protrusion, so that the locking rod slides from the locking groove to the seventh arc groove. After the wire pull ring is released, the reset spring acts on the locking seat to reset.

8. The linkage folding structure of a child stroller according to claim 7, characterized in that: The limiting protrusion is an arc-shaped strip, and the portion where the wire pull ring contacts the limiting protrusion is also an arc-shaped structure and is concentric with the arc-shaped strip, so that the limiting protrusion can perform linear motion and circular rotation motion.

9. The linkage folding structure of a child stroller according to claim 8, characterized in that: A clamping groove is provided at the end of the locking rod. After the locking rod passes through the fixing groove, a clamping ring passes through the clamping groove to axially position the locking rod.

10. The linkage folding structure of a child stroller according to claim 7, characterized in that: The side surfaces of the push handle joint are located on both sides of the pull wire ring and are respectively provided with limited position convex strips.

Images