Linkage folding structure of stroller

Abstract

The utility model 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. The folding bicycle frame has the advantages that the appearance is simple, the structure is compact, the transmission force loss is less, the folding is easy, the joints are arranged in a laminated manner, the assembly process is greatly simplified, the locking effect is good, and the stability and the strength of the bicycle frame are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of children's pushchair, specifically a linkage folding structure of children's pushchair. BACKGROUND

[0002] The children's pushchair is designed into a foldable structure when not in use to reduce the occupied space, so that the children's pushchair can be stored together when stored, the volume is reduced, and storage is facilitated, but in the existing folding structure, linkage and locking are realized by rotating a plurality of external connecting rods, so that the frame becomes complex and the locking effect is not ideal, the frame stability is poor, and the strength is low, therefore, the linkage folding structure of children's pushchair is provided to solve the above problems. SUMMARY

[0003] In view of the existing problems, the utility model provides a linkage folding structure of children's pushchair, which can effectively solve the problems in the background art.

[0004] To solve the above problems, the utility model adopts the following technical scheme:

[0005] A linkage folding structure of children's pushchair, which comprises a middle shaft rod, a push handle joint, a front leg joint and a rear leg joint which are stacked in sequence and coaxially arranged, the middle shaft rod passes through the center holes of the push handle joint, the front leg joint and the rear leg joint in sequence, a linkage piece is arranged between the push handle joint and the front leg joint, the push handle joint and the front leg joint rotate synchronously through the linkage piece and in opposite directions, and the push handle joint and the front leg joint both rotate relative to the rear leg joint, a locking structure is arranged on the side of the push handle joint away from the front leg joint, the locking structure comprises a locking rod, first locking grooves are arranged on the push handle joint and the front leg joint, a second locking groove is arranged in the rear leg joint, the locking rod passes through the first locking grooves on the push handle joint and the front leg joint in sequence and then extends into the second locking groove in the rear leg joint, and the locking rod slides out of the first locking groove to unlock the push handle joint.

[0006] As a further scheme of the utility model, an outer cover is clamped on the side of the push handle joint away from the front leg joint, an inner cover is fixedly connected to the side of the rear leg joint away from the front leg joint, a plug hole is arranged on the inner cover for mounting a front handrail rod.

[0007] As a further scheme of the utility model: the same side of the linkage piece is respectively equipped with first cylinder and second cylinder, first arc slot, first straight slot and fourth arc slot are equipped on the front joint, first positioning hole and second arc slot are equipped on the rear joint, the first cylinder in the linkage piece is rotatably connected through the first arc slot and the first positioning hole, the second cylinder is inserted into the second arc slot through the first straight slot, the second straight slot is equipped on the linkage piece, the third cylinder is arranged on the handle joint, the third cylinder is inserted into the fourth arc slot through the second straight slot, the third cylinder and the center of the handle joint form a rotating force arm, when the handle joint rotates, the third cylinder generates a friction force arm in the second straight slot of the linkage piece, drives the linkage piece to rotate around the first cylinder, the rotating direction of the front joint of the linkage piece is opposite, the second cylinder in the linkage piece generates a friction force arm in the first straight slot, drives the front joint and the linkage piece to rotate synchronously and in the same direction.

[0008] As a further scheme of the utility model: the fifth arc slot is equipped on the linkage piece, the first straight slot and the middle part of the fifth arc slot are communicated, the middle shaft rod passes through the fifth arc slot, when the linkage piece rotates, the middle shaft rod moves relatively in the fifth arc slot.

[0009] As a further scheme of the utility model: it further includes short shaft rod, the sixth arc slot is arranged on the handle joint, the limiting concave arc slot is equipped on the linkage piece, the fixing hole is equipped on the rear joint, the short shaft rod is fixedly connected with the fixing hole through the sixth arc slot, the limiting concave arc slot and the first arc slot, and is used for limiting the rotating direction of the handle joint and the front joint relative to the rear joint.

[0010] As a further scheme of the utility model: the seventh arc slot is arranged on the handle joint and the front joint, the seventh arc slot and the first locking slot are communicated, and the length of the first locking slot is greater than the width of the seventh arc slot, the seventh arc slot on the handle joint and the seventh arc slot on the front joint are respectively located on the two sides of the first locking slot, the locking structure includes sliding structure, the sliding structure drives the locking rod to slide from the first locking slot to the seventh arc slot, and the handle joint is unlocked.

[0011] As a further scheme of the utility model: the sliding structure includes pull line ring and locking seat, the pull line ring is arranged between the locking seat and the handle joint and slides along the handle joint, the locking rod is fixed on the locking seat, the sliding groove is arranged on the locking seat, the spring seat is arranged in the sliding groove, the spring seat and the locking seat are connected through the reset spring, the middle shaft rod passes through the spring seat, the limiting protrusion is arranged on one side of the locking seat, the limiting protrusion is inserted into the pull line ring, when the pull line ring slides, the limiting protrusion drives the locking seat to slide, so that the locking rod slides from the first locking slot to the seventh arc slot, after the pull line ring is loosened, the reset spring resets the locking seat.

[0012] As a further scheme of the utility model: the limiting protrusion is arc-shaped strip, and the part where the pull ring and the limiting protrusion contact is also arc-shaped structure and with the arc-shaped strip same center, so that the limiting protrusion can make linear motion and circumferential rotation motion.

[0013] As a further scheme of the utility model: the end of the locking rod is equipped with a clamping groove, and the locking rod is axially positioned by the clamping ring through the clamping groove after passing through the second locking groove.

[0014] As a further scheme of the utility model: the side surface of the push handle joint is equipped with limiting protrusions on both sides of the pull ring.

[0015] Compared with the prior art, the utility model has the beneficial effects that: the utility model adopts the built-in linkage sheet and locking structure to link and lock the push handle joint, front leg joint and rear leg joint, has simple appearance, compact structure, less force transmission loss, easy folding, adopts the stacking arrangement between joints, greatly simplifies the assembly process, has good locking effect, improves the stability and strength of the frame. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a whole structure perspective schematic view of a linkage folding structure of a child stroller;

[0017] Figure 2 It is a side surface schematic view of a linkage folding structure of a child stroller without outer cover;

[0018] Figure 3 It is a view angle split structure schematic view of a linkage folding structure of a child stroller;

[0019] Figure 4 It is another view angle split structure schematic view of a linkage folding structure of a child stroller;

[0020] Figure 5 It is a push handle joint structure schematic view in a linkage folding structure of a child stroller;

[0021] Figure 6 It is a front leg joint structure schematic view in a linkage folding structure of a child stroller;

[0022] Figure 7 It is a rear leg joint structure schematic view in a linkage folding structure of a child stroller;

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

[0024] Figure 9It is a perspective view of a locking structure in a linkage folding structure of a child stroller;

[0025] Figure 10 It is another perspective view of a locking structure in a linkage folding structure of a child stroller;

[0026] Figure 11 It is a split view of a locking structure in a linkage folding structure of a child stroller;

[0027] Figure 12 It is a connection diagram of only steel sheet plates in a push handle joint, a front leg joint and a rear leg joint in a linkage folding structure of a child stroller;

[0028] Figure 13 It is a connection diagram of only steel sheet plates in a push handle joint and a front leg joint in a linkage folding structure of a child stroller;

[0029] Figure 14 It is a connection diagram of steel sheet plates and linkage plates in a push handle joint in a linkage folding structure of a child stroller.

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

[0031] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0032] In combination with Figures 1 to 14To illustrate the present embodiment, the present embodiment provides a linkage folding structure of a child stroller, which comprises a middle shaft 5 and a push handle joint 1, a front leg joint 2 and a rear leg joint 3 which are sequentially stacked and coaxially arranged, the middle shaft 5 sequentially passes through the center holes of the push handle joint 1, the front leg joint 2 and the rear leg joint 3, a linkage sheet 4 is arranged between the push handle joint 1 and the front leg joint 2, the push handle joint 1 rotates synchronously with the front leg joint 2 through the linkage sheet 4 and the rotating direction is opposite, and the push handle joint 1 and the front leg joint 2 both rotate relative to the rear leg joint 3, a locking structure 6 is arranged on the side of the push handle joint 1 away from the front leg joint 2, the locking structure 6 comprises a locking rod 61, and first locking grooves 7 which are matched with the locking structure 6 are arranged on the push handle joint 1 and the front leg joint 2, a second locking groove 34 is arranged in the rear leg joint 3, the locking rod 61 sequentially passes through the first locking grooves 7 on the push handle joint 1 and the front leg joint 2 and then extends into the second locking groove 34 of the rear leg joint 3, and the locking rod slides out of the first locking grooves 7 to unlock the push handle joint 1.

[0033] Further, an outer cover 8 is clamped on the side of the push handle joint 1 away from the front leg joint 2, and an inner cover 9 is fixedly connected to the side of the rear leg joint 3 away from the front leg joint 2, the inner cover 9 is provided with a plug hole 91 for mounting a front handrail rod.

[0034] Further, first and second cylinders 41 and 42 are respectively arranged on the same side of the linkage sheet 4, the front leg joint 2 is provided with a first arc-shaped groove 21, a first straight groove 22 and a fourth arc-shaped groove 23, the rear leg joint 3 is provided with a first positioning hole 31 and a second arc-shaped groove 32, the first cylinder 41 in the linkage sheet 4 is rotationally connected through the first arc-shaped groove 21 and the first positioning hole 31, the second cylinder 42 extends into the second arc-shaped groove 32 through the first straight groove 22, the linkage sheet 4 is provided with a second straight groove 43, the push handle joint 1 is provided with a third cylinder 11 which extends into the fourth arc-shaped groove 23 through the second straight groove 43, the third cylinder 11 forms a rotating force arm at the center of the push handle joint 1, when the push handle joint 1 rotates, the third cylinder 11 generates a friction force arm in the second straight groove 43 of the linkage sheet 4, drives the linkage sheet 4 to rotate with the first cylinder 41 as the center, the rotating direction of the linkage sheet 4 and the front leg joint 2 is opposite, the second cylinder 42 in the linkage sheet 4 generates a friction force arm in the first straight groove 22, drives the front leg joint 2 to synchronously and directionally rotate with the linkage sheet 4.

[0035] Further, the linkage sheet 4 is provided with a fifth arc-shaped groove 44 which passes the center, the first straight groove 22 and the middle part of the fifth arc-shaped groove 44 are in communication, and the middle shaft 5 passes the fifth arc-shaped groove 44, when the linkage sheet 4 rotates, the middle shaft 5 moves relatively in the fifth arc-shaped groove 44.

[0036] Further, the short shaft 10 is arranged on the push handle joint 1 with a sixth arc-shaped slot 12, the linkage piece 4 is arranged with a limiting concave arc slot 45, the rear leg joint 3 is arranged with a fixing hole 33, the short shaft 10 is fixedly connected with the fixing hole 33 after passing through the sixth arc-shaped slot 12, the limiting concave arc slot 45 and the first arc-shaped slot 21, and is used for limiting the rotating direction of the push handle joint 1 and the front leg joint 2 relative to the rear leg joint 3.

[0037] Further, the push handle joint 1 and the front leg joint 2 are arranged with a seventh arc-shaped slot 14 (24), the seventh arc-shaped slot 14 (24) is communicated with the first locking slot 7, the length of the first locking slot 7 is greater than the width of the seventh arc-shaped slot 14 (24), the seventh arc-shaped slot 14 on the push handle joint 1 and the seventh arc-shaped slot 24 on the front leg joint 2 are respectively arranged on the two sides of the first locking slot 7, the rear leg joint 3 is arranged with a second locking slot 34 matched with the first locking slot 7, the locking structure 6 comprises a sliding structure, the locking rod 61 passes through the first locking slot 7 on the push handle joint 1 and the front leg joint 2 in sequence and then extends into the second locking slot 34 of the rear leg joint 3, the push handle joint 1 is locked, the sliding structure drives the locking rod 61 to slide from the first locking slot 7 to the seventh arc-shaped slot 14 (24), and the push handle joint 1 is unlocked.

[0038] Further, the sliding structure comprises a pull line ring 62 and a locking seat 63, the pull line 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 line ring 62 is fixedly connected with a rope, the rope is fixedly connected with a folding button on the push handle, the pull line ring 62 is pulled upward and slides by pressing the folding button, the locking rod 61 is fixed on the locking seat 63, the locking seat 63 is arranged with a sliding slot 64, the sliding slot 64 is arranged with a spring seat 65, the spring seat 65 is connected with the locking seat 63 through a reset spring 66, the middle shaft 5 passes through the spring seat 65, one side of the locking seat 63 is arranged with a limiting protrusion 67, the limiting protrusion 67 extends into the pull line ring 62, the locking seat 63 is driven to slide by the limiting protrusion 67 when the pull line ring 62 slides, so that the locking rod 61 slides from the first locking slot 7 to the seventh arc-shaped slot 14 (24), and the locking seat 63 is reset by the reset spring 66 after the pull line ring 62 is released.

[0039] Further, the limiting protrusion 67 is a circular arc-shaped strip, the part of the pull line ring 62 in contact with the limiting protrusion 67 is also a circular arc-shaped structure and has the same center as the arc-shaped strip, so that the limiting protrusion 67 can make linear motion and circular rotation motion, the end of the locking rod 61 is arranged with a clamping slot, the locking rod 61 is axially positioned by a clamping ring passing through the clamping slot after passing through the second locking slot 34, the limiting protrusions 13 are arranged on the two sides of the pull line ring 62 on the side surface of the push handle joint 1, and are used for limiting the two sides of the pull line ring 62, so as to ensure that the pull line ring 62 slides along the linear direction.

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

[0041] Further, the push handle joint 1, the front leg joint 2 and the rear leg joint 3 are all wrapped with built-in rigid plates and plastic special-shaped members, and the rigid plates and the arc-shaped grooves, holes and the like on the outer plastic special-shaped members are correspondingly arranged and have consistent sizes, and the plastic special-shaped members are arranged to improve the appearance and facilitate the connection with the frame.

[0042] The working principle of the utility model is: the pull ring 62 is pulled upward to drive the locking seat 63 to move upward to compress the reset spring 66, the locking top seat drives the locking rod 61 to slide from the first locking groove 7 into the seventh arc-shaped groove 14 (24), the push handle joint 1 is unlocked, the push handle joint 1 rotates towards the rear leg joint 3, simultaneously drives the front leg joint 2 to rotate towards the rear leg joint 3 through the linkage piece 4 to realize joint folding, when unfolding, the push handle joint 1 rotates away from the rear leg joint 3, simultaneously drives the front leg joint 2 to rotate away from the rear leg joint 3, after unfolding, the reset spring 66 elastically pushes the locking seat 63 to move downward to make the locking rod 61 slide into the first locking groove 7 to complete joint unfolding locking, the push handle joint 1, the front leg joint 2 and the rear leg joint 3 are linked and locked through the built-in linkage piece 4 and the locking structure 6, the appearance is simple, the structure is compact, the force transmission loss is small, folding is easy, the joints are arranged in a stacked manner, the assembly process is greatly simplified, the locking effect is good, and the stability and strength of the frame are improved.

[0043] It should be noted that in this document, relationship terms such as first and second are used only to differentiate one entity or action from another, and do not necessarily require or imply that there is any such actual relationship or order between these entities or actions, and the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or equipment.

[0044] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A linkage folding structure for a children's stroller, characterized in that, The device includes a central axis and a push handle joint, a front foot joint, and a rear foot joint arranged coaxially and stacked in sequence. The central axis 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, but in opposite directions. Both the push handle joint and the front foot joint 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 includes a locking rod. The push handle joint and the front foot joint are provided with a first locking groove, and the rear foot joint is provided with a second locking groove. The locking rod passes through the first locking groove 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, unlocking the push handle joint.

2. The linkage folding structure of a children's stroller according to claim 1, characterized in that, The push handle joint is fitted with an outer cover on the side opposite to the front foot joint, and the rear foot joint is fixedly connected with an inner cover on the side opposite to the front foot joint. The inner cover has a hole for installing the front handrail.

3. The linkage folding structure of a children's stroller according to claim 1, characterized in that, The linkage plate has a first cylinder and a second cylinder on the same side. The front joint has a first arc-shaped groove, a first straight groove, and a fourth arc-shaped groove. The rear joint has a first positioning hole and a second arc-shaped groove. The first cylinder in the linkage plate passes through the first arc-shaped 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-shaped groove. The linkage plate has a second straight groove. The push handle joint has a third cylinder. The third cylinder passes through the second straight groove and extends into the fourth arc-shaped groove. The third cylinder and the center of the push handle joint form a rotational lever arm. When the push handle joint rotates, the third cylinder generates a frictional lever arm in the second straight groove of the linkage plate, causing the linkage plate to rotate around the first cylinder. The rotation direction of the front joint of the linkage plate is opposite. The second cylinder in the linkage plate generates a frictional lever arm in the first straight groove, causing the front joint and the linkage plate to rotate synchronously and in the same direction.

4. The linkage folding structure of a children's stroller according to claim 3, characterized in that, The linkage plate is provided with a fifth arc-shaped groove passing through the center. The first straight groove is connected to the middle of the fifth arc-shaped groove. The central shaft passes through the fifth arc-shaped groove. When the linkage plate rotates, the central shaft moves relative to the fifth arc-shaped groove.

5. The linkage folding structure of a children's stroller according to claim 4, characterized in that, It also includes a short shaft, a sixth arc-shaped groove on the push handle joint, a limiting concave arc groove on the linkage plate, and a fixing hole on the rear foot joint. The short shaft passes through the sixth arc-shaped groove, the limiting concave arc groove, and the first arc groove and is fixedly connected to 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.

6. The linkage folding structure of a children's stroller according to claim 1, characterized in that, Both the push handle joint and the front foot joint are provided with a seventh arc-shaped groove. The seventh arc-shaped 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-shaped groove. The seventh arc-shaped groove on the push handle joint and the seventh arc-shaped groove on the front foot joint are respectively located on both sides of the first locking groove. The locking structure includes a sliding structure. After the sliding structure drives the locking rod to slide from the first locking groove to the seventh arc-shaped groove, the push handle joint is unlocked.

7. The linkage folding structure of a children's stroller according to claim 6, characterized in that, The sliding structure includes a pull cord ring and a locking seat. The pull cord ring is located 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 has a sliding groove, and a spring seat is located in the sliding groove. The spring seat and the locking seat are connected by a return spring. The central shaft passes through the spring seat. A limit protrusion is provided on one side of the locking seat. The limit protrusion extends into the pull cord ring. When the pull cord ring slides, the limit protrusion drives the locking seat to slide, so that the locking rod slides from the first locking groove to the seventh arc-shaped groove. After the pull cord ring is released, the return spring acts to reset the locking seat.

8. The linkage folding structure of a children's stroller according to claim 7, characterized in that, The limiting protrusion is an arc-shaped strip, and the part of the pull ring that contacts the limiting protrusion is also an arc-shaped structure and has the same center as the arc-shaped strip, so that the limiting protrusion can perform linear motion and circular rotational motion.

9. The linkage folding structure of a children's stroller according to claim 8, characterized in that, The locking rod has a slot at its end. After passing through the second locking slot, the locking rod is axially positioned by a retaining ring passing through the slot.

10. The linkage folding structure of a children's stroller according to claim 7, characterized in that, Limiting protrusions are provided on the sides of the push handle joint on both sides of the pull cable ring.

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