CN220349770U - Child cart - Google Patents

Abstract

The application discloses a child cart, which comprises a first foot rod assembly, a second foot rod assembly, a handle rod assembly and a cart collecting joint, wherein the cart collecting joint comprises a first element, a second element and a third element which are pivoted around the same axis and are respectively fixedly connected with the handle rod assembly, the first foot rod assembly and the second foot rod assembly, and the handle rod assembly is provided with a first state of inclining towards a first direction and a second state of inclining towards a second direction; the bottoms of the first foot rod assembly and the second foot rod assembly are respectively rotatably provided with a first wheel assembly and a second wheel assembly, all the wheel assemblies are in a universal state capable of rotating freely in a horizontal plane and an orientation state capable of advancing only along a fixed direction, the two foot rod assemblies are respectively provided with a positioning lock pin controlled by a vehicle collecting joint through a transmission assembly, the handle rod assembly is switched from the first state to the second state, the first wheel assembly is switched from the orientation state to the universal state, and the second wheel assembly is switched from the universal state to the orientation state. The operation is more convenient.

Description

Child cart

Technical Field

The application relates to the technical field of children's carriages, in particular to a children's carriage.

Background

The children's barrow is mainly used for the vehicle that children took in the open air. The child stroller generally includes a handlebar stem, a first foot stem, and a second foot stem, with first and second wheels mounted to bottoms of the first and second foot stems, respectively. For example, patent document with publication number TWI783266B discloses a child carrier, in which state switching of a first wheel and a second wheel requires control switching of an operating member on a handle bar, one-step switching operation is required to be added after the handle is switched, the operation is complicated, the operating member is far away from two wheel assemblies, and corresponding transmission members are arranged and the cost is increased.

The child cart is characterized in that the seat assembly is rotated to switch the states of the wheels, so that the child cart is complex in operation.

Disclosure of Invention

The application provides a child cart, convenient use after changing direction.

The application provides a child stroller, which comprises a first foot rod assembly, a second foot rod assembly, a handle rod assembly and a cart collecting joint, wherein the cart collecting joint comprises a first element, a second element and a third element which are pivoted around the same axis, the first element, the second element and the third element are respectively fixedly connected with the handle rod assembly, the first foot rod assembly and the second foot rod assembly, and the handle rod assembly is provided with a first state inclined towards a first direction and a second state inclined towards a second direction;

the bottoms of the first foot rod assembly and the second foot rod assembly are respectively rotatably provided with a first wheel assembly and a second wheel assembly, all the wheel assemblies have a universal state capable of freely rotating in a horizontal plane and an orientation state capable of advancing only along a fixed direction, positioning lock pins controlled by the vehicle collecting joints through transmission assemblies are arranged on the two foot rod assemblies, the handle rod assemblies are switched from a first state to a second state, the first wheel assemblies are switched from the orientation state to the universal state, and the second wheel assemblies are switched from the universal state to the orientation state;

the first element is provided with a rotating shaft which is pivotally connected with the second element and the third element, and a first abutting part and a second abutting part which act on the corresponding transmission assembly to enable the wheel assembly to be switched between various states are arranged on the rotating shaft.

The following provides several alternatives, but not as additional limitations to the above-described overall scheme, and only further additions or preferences, each of which may be individually combined for the above-described overall scheme, or may be combined among multiple alternatives, without technical or logical contradictions.

Optionally, the first wheel assembly and the second wheel assembly are provided with a positioning locking groove matched with the positioning locking pin, and a fourth elastic piece which acts on the positioning locking pin to enable the positioning locking pin to be inserted into the positioning locking groove;

the transmission assembly comprises a transmission piece which is linked with the positioning lock pin through a stay wire and is matched with the handle rod assembly, and a fifth elastic piece which acts on the transmission piece to reset the transmission piece, wherein the elastic force of the fifth elastic piece is larger than that of the fourth elastic piece, so that the transmission piece resets to drive the positioning lock pin to exit the positioning lock groove.

Optionally, the first abutting portion and the second abutting portion act on the corresponding transmission member, so that the state of each wheel assembly is switched.

Optionally, the stroller includes a first locking member axially movable and a linkage member rotatable about the axis of the shaft, the first locking member including a coupling portion with the shaft and a locking portion between the linkage member and the second member, and having a locked state in which the locking portion is coupled with the second member and a released state out of the second member.

Optionally, the rotating shaft is of a hollow structure, is sleeved on the periphery of the connecting part, and is provided with a limiting mechanism therebetween;

the limit mechanism comprises:

the second convex key is arranged on the periphery of the connecting part;

the first stop block is arranged in the rotating shaft, and when the handle rod assembly is in the second state, the first stop block abuts against the second convex key.

Optionally, the pivot includes first section and the second section of mutual nested, the second is supported and is leaned against the portion setting in first section, the first portion of supporting is supported and is leaned against the portion setting in the second section, the second is supported and is supported portion and first portion of supporting and lean against the dislocation arrangement in circumference.

Optionally, the second section is cylindrical, and the first abutting part is a bump arranged at the periphery of the second section.

Optionally, the first section is cylindrical, and one end has a radially extending flange, and a part of the flange further extends radially to form the second abutting portion.

Optionally, the locking mechanism comprises a first elastic member acting on the locking part of the first locking member in a locked state.

According to the child stroller, the wheel state is switched by rotating the handle rod assembly to adapt to the moving direction of the child stroller, and the child stroller is easier and more convenient to operate instead of rotating the seat assembly or operating an operating piece on the handle rod; and elements for switching the wheel states are intensively arranged in the vehicle collecting joint, so that the manufacturing cost of the transmission piece is reduced.

Drawings

FIG. 1 is a schematic view of a stroller according to an embodiment of the present application in an unfolded state;

FIG. 2 is a schematic illustration of the backrest of the seat assembly of FIG. 1 in a folded condition;

FIG. 3 is a schematic view of the seat assembly of FIG. 2 in a folded condition;

FIG. 4 is a schematic view of the stroller of FIG. 3 in a folded condition;

FIG. 5 is a front view of a pickup joint according to an embodiment of the present application;

FIG. 6 is a right side view of the roll-up joint of FIG. 5;

FIG. 7 is an exploded view of a fourth element according to an embodiment of the present application;

FIG. 8 is an exploded view of a linkage of an embodiment of the present application;

FIG. 9 is an exploded view of FIG. 8 at another view angle;

FIG. 10 is a further exploded view of FIG. 8;

FIG. 11 is an exploded view of FIG. 10 at another view angle;

FIG. 12 is a section view of the portion G-G of FIG. 6;

FIG. 13 is a cross-sectional view of a first latch member and a second latch member in a release position according to an embodiment of the present application;

FIG. 14 is a section view of section A-A of FIG. 5;

FIG. 15 is a cross-sectional view of the roll-up joint of FIG. 14 in a folded condition;

FIG. 16 is an exploded view between a linkage member and a first locking member in accordance with one embodiment of the present application;

FIG. 17 is a partial perspective view of a first element according to an embodiment of the present application;

FIG. 18 is a perspective view of a first locking member and a spindle according to one embodiment of the present application;

FIG. 19 is a perspective view of the second section of FIG. 18;

FIG. 20 is an exploded view of FIG. 18;

FIG. 21 is a view of the relationship between the first locking member and the spindle of the folding joint of FIG. 18 in the unfolded state;

FIG. 22 is a view of the first locking member of FIG. 21 in the unlocked position with the first stop abutting the first tab;

FIG. 23 is an exploded view of the first member, spindle, second member, second locking member, first driving member of an embodiment of the present application;

FIG. 24 is a perspective view of the second latch of FIG. 23;

FIG. 25 is a perspective view of the first driver of FIG. 23;

FIG. 26 is a section view of section F-F of FIG. 5;

FIG. 27 is a cross-sectional view of the first actuating member of FIG. 26 rotated by the pull wire to actuate the second locking member in the unlocked position;

FIG. 28 is a partial cross-sectional view of a wheel assembly according to an embodiment of the present application;

FIG. 29 is a section view of section A-A of FIG. 28;

FIG. 30 is a cross-sectional view of portion D-D of FIG. 5 (with the first element in the first state);

FIG. 31 is a cross-sectional view of portion E-E of FIG. 5 (with the first element in a first state);

FIG. 32 is a cross-sectional view of portion B-B of FIG. 5 (with the first element in the first state);

FIG. 33 is a cross-sectional view of the first member of FIG. 30 in a second state;

FIG. 34 is a cross-sectional view of the first member of FIG. 31 in a second state;

FIG. 35 is a perspective view of a second section of an embodiment of the present application;

FIG. 36 is a perspective view of a first segment of an embodiment of the present application;

FIG. 37 is a cross-sectional view of a first locking member according to an embodiment of the present application;

fig. 38 is a view showing a relationship between the second stopper and the second protrusion in another set when the first member is in the second state according to an embodiment of the present application.

Reference numerals in the drawings are described as follows:

110. a first element; 111. a third cavity; 113. a connecting rod; 114. a second abutting portion; 115. a first abutting portion;

120. a second element; 121. a second cavity; 122. a fourth cavity;

130. a third element; 140. a fourth element; 141. a first locking pin; 142. a second elastic member; 143. and (3) a torsion spring.

150. A second locking member; 151. a second inclined surface; 152. an avoidance groove; 153. a second bump; 154. a second latch; 155. a notch; 160. a second elastic member;

170. a first driving member; 171. a second guide groove; 180. a first pull wire;

190. a rotating shaft; 191. a first unlocking section; 1911. a flange; 1922. an active region; 1923. an avoidance zone; 192. a second section; 1921. a first stopper; 1922. a second stopper;

210. a handle bar assembly; 220. a first foot bar assembly; 230. a second foot bar assembly; 240. a transmission assembly; 250. positioning a lock pin; 260. a seat assembly; 261. a seat; 262. a backrest;

310. a first wheel assembly; 320. a second wheel assembly; 331. positioning a lock pin; 332. positioning a locking groove; 333. a fourth elastic member; 334. a second pull wire; 335. a fifth elastic member; 340. a transmission member; 341. a second transmission member; 342. a third transmission member;

400. a linkage assembly; 410. a first locking member; 411. a coupling part; 4111. a first protruding key; 4112. a first inclined surface; 4113. a second protruding key;

412. a locking part; 4121. a first latch; 413. an unlocking part;

420. a first elastic member; 430. a linkage member; 431. a first cavity; 432. a first locking groove; 433. a through hole; 441. a first linkage rod; 442. a second link lever; 443. and a third linkage rod.

Detailed Description

The following description of the technical solutions in the embodiments of the present application will be made clearly and completely with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.

It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. When an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.

In this application, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number, order of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, the meaning of "plurality" is at least two, such as two, three, etc., unless explicitly defined otherwise.

The existing multifunctional children cart can be folded, reversed, folded by seat linkage and the like, and the problem that the frame structure is complex or the appearance is not compact due to the multiple functions is caused.

As shown in fig. 1, 5-13, 28 and 29, the present application further provides a stroller, including a first foot bar assembly, a second foot bar assembly, a handle bar assembly, and a folding joint, where the folding joint includes a first element 110, a second element 120, and a third element 130 pivoted about the same axis, and the first element 110, the second element 120, and the third element 130 are fixedly connected to the handle bar assembly 210, the first foot bar assembly 220, and the second foot bar assembly 230, respectively. The handle bar assembly 210 has a first state tilted to a first direction and a second state tilted to a second direction. Wherein the first direction is on the side of the first leg assembly 220 and the second direction is on the side of the second leg assembly 230.

The bottoms of the first foot bar assembly 220 and the second foot bar assembly 230 are respectively rotatably provided with a first wheel assembly 310 and a second wheel assembly 320, all the wheel assemblies have a universal state capable of freely rotating in a horizontal plane and an orientation state capable of advancing only along a fixed direction, the first foot bar assembly 220 and the second foot bar assembly 230 are provided with a positioning lock pin 331 controlled by a folding joint through a transmission assembly 240, the handle bar assembly 210 is switched from the first state to the second state, the first wheel assembly 310 is switched from the orientation state to the universal state, and the second wheel assembly 320 is switched from the universal state to the orientation state.

The first element 110 has a rotation shaft 190 pivotally connected to the second element 120 and the third element 130, the rotation shaft 190 being provided with a first abutment 115 and a second abutment 114 acting on the respective transmission assemblies to switch the wheel assemblies between the respective states. The transmission assembly is a reciprocal cooperation of one or more elements.

The wheel state is switched by rotating the handle rod assembly to adapt to the moving direction of the child cart, and the operation piece on the handle rod is not rotated by rotating the seat assembly or operated, so that the child cart is easier and more convenient; and elements for switching the wheel states are intensively arranged in the vehicle collecting joint, so that the manufacturing cost of the transmission piece is reduced.

When the handle bar assembly is rotated, the second locking member needs to be driven to be in a locking release position, and the second locking member can be reset to a locking position to keep unfolding whether in the first state or the second state. In combination with the folding of the seat assembly and the vehicle retracting joint, the handle bar assembly can be realized by continuously rotating a certain angle to the first direction on the basis of the first state, and the reversing operation direction of the handle bar assembly is opposite to the reversing operation direction, so that the occurrence of the condition of unexpected folding is avoided.

Regarding the switching of the two wheel assemblies during the reversing of the handlebar assembly, the following is specific:

referring to fig. 29 to 38, the first and second wheel assemblies 310 and 320 are provided with a detent groove 332 engaged with the detent pin 331, and a fourth elastic member 333 acting on the detent pin 331 to be inserted into the detent groove 332;

the transmission assembly comprises a transmission piece 340 which is linked with the positioning lock pin 331 through the second stay wire 334 and is matched with the handle bar assembly 210, and a fifth elastic piece 335 which acts on the transmission piece 340 to reset the transmission piece, wherein the elastic force of the fifth elastic piece 335 is larger than that of the fourth elastic piece 333, so that the transmission piece 340 resets to drive the positioning lock pin 331 to exit the positioning lock groove 332.

The corresponding switching to the orientation state is that the transmission piece 340 moves and compresses the fifth elastic piece 335 when being stressed, the second pull wire 334 is correspondingly released, the fourth elastic piece 333 resets to push the positioning lock pin 331 to extend into the positioning lock groove 332, and if the positioning lock groove 332 is aligned with the positioning lock pin 331.

The two transmission members 340 are a second transmission member 341 and a third transmission member 342 movably disposed in the second element 120 and the third element 130, and the first element 110 is radially provided with a second abutting portion 114 and a first abutting portion 115 acting on the second transmission member 341 and the third transmission member 342 respectively;

as shown in fig. 30 to 32, when the handle bar assembly 210 is in the first state, the first abutting portion 115 abuts against the third transmission member 342, and the second abutting portion 114 is far from the release second transmission member 341;

as shown in fig. 33 and 34, when the handle bar assembly 210 is in the second state, the first abutting portion 115 is far away from the release third transmission member 342, and the second abutting portion 114 is close to the pressing second transmission member 341.

Referring to fig. 35 to 38, in an embodiment, the first element 110 has a rotating shaft 190 extending in an axial direction, and the second abutting portion 114 and the first abutting portion 115 are arranged at an outer periphery of the rotating shaft in a staggered manner in the axial direction. The staggered arrangement is understood to mean that the second abutment 114 is arranged adjacent to the proximal end and the first abutment 115 is arranged adjacent to the distal end, so that the two driving members are axially staggered with respect to each other, the spatial structure of the corresponding second element 120 and third element 130 only takes into account the corresponding driving members and abutment, the space for avoiding driving members and abutments is reduced, and the respective structural strength of the second element and third element is relatively ensured.

In an embodiment, the rotating shaft 190 includes a first segment 191 and a second segment 192 that are nested with each other, the second abutting portion 114 is disposed on the first segment 191, the first abutting portion 115 is disposed on the second segment 192, and the second abutting portion 114 and the first abutting portion 115 are arranged in a staggered manner in the circumferential direction. And the first section 191 and the second section 192 are located on both sides of the second element 120.

Wherein, both unlocking pieces are cylindrical, and the first abutting part 115 is a first bump arranged on the periphery of the second section 192.

Referring back to fig. 1 to 13, the folding joint includes a first element 110, a second element 120, a third element 130 and a linkage assembly 400 that can rotate around the same axis, the folding joint has an unfolded state and a folded state, and when folding, the first element 110 rotates towards the second element 120 or the third element 130, and simultaneously drives the second element 120 and the third element 130 to rotate towards each other through the linkage assembly 400.

Referring to fig. 7 to 13, the linkage assembly 400 includes a first locking member 410 capable of moving along an axial direction, and a linkage member 430 capable of rotating around a rotation axis and connecting the linkage assembly 400, the first locking member 410 includes a coupling portion 411 cooperating with the rotation axis 190 and a locking portion 412 interposed between the linkage member 430 and the second member 120, the second member 120 and the linkage member 430 respectively have a first cavity 431 and a second cavity 121 cooperating with the locking portion 412, the first locking member 410 has a locking position (as shown in fig. 12) in which the locking portion 412 simultaneously extends into the first cavity 431 and the second cavity 121, and a release locking position (as shown in fig. 13) in which the first member 110 is separated from the second cavity 121 and extends into only the first cavity 431, and when the first locking member 410 is in the release locking position, the first member 110 can drive the linkage member 430 to rotate through the first locking member 410, so as to drive the second member 120 and the third member 130 through the linkage assembly 400.

Wherein the retracting joint comprises a first elastic member 420 acting on the first locking member 410 to bring it into a locking position.

For convenience of description, the first element 110 is defined to be proximal to the end thereof, and the linkage 430 is defined to be distal to the end thereof.

Referring to fig. 38, a limiting mechanism is disposed between the rotating shaft 190 and the coupling portion 411, the limiting mechanism includes a second protruding key 4113 and a first stop 1921, and the second protruding key 4113 is disposed at the periphery of the coupling portion; the first block 1921 is disposed inside the rotating shaft 190, and the first block 1921 abuts against the second protruding key 4113 when the handle bar assembly 210 is in the second state. The first stop 1921 and the second stop 1922 are both disposed on an inner wall of the second section 192, and the first stop 1921 and the second stop 1922 are formed in one group, two groups, and two groups are disposed 180 degrees. Correspondingly, the first protruding key 4111 and the second protruding key 4113 on the coupling portion 411 form a group, and are also two groups and are disposed at 180 degrees. The two sets of stops and the two sets of tabs cooperate with each other when the first element is in the first state.

Wherein the first protruding key 4111 and the second protruding key 4113 have a gap 4114 therebetween through which the second stopper 1922 passes. The first member 110 rotates in the second direction (the first locking member is in the locking position), and the second block 1922 passes through the gap 4114 until the first block 1921 abuts against the second protruding key 4113 in the other set, so as to perform a reversing positioning assistance function. And finishing reversing operation after the subsequent automatic resetting of the second locking piece.

Referring to fig. 37, the distal end of the first segment 191 extends radially beyond a complete flange 1911, a portion of the periphery of the flange 1911 further extends to form an active region 1912 of the second abutment 114, and the remainder of the periphery of the flange 1911 is a relief region 1913 that allows the second transmission member to return.

The folding process of the present embodiment has a pre-operation, specifically, an initial stage (for example, a period of rotating by a certain angle before the first locking member 410 is not completely located at the releasing position) of rotating the first element 110, so as to complete the unlocking. In the initial stage, the second and third elements are kept still, and after unlocking is completed, the second and third elements are rotated and folded. The first locking member 410 not only keeps the vehicle retracting joint in an unfolding state when in the locking position, but also realizes the connection and relative fixation between the first element 110 and the linkage member 430 after being switched to the unlocking position, thereby assisting in completing folding, omitting a rod originally hinged with the first element and used for folding linkage or removing a hinge point of the first element, and ensuring a more concise appearance.

The folding joint integrates the linkage folding of the whole vehicle and the attribute switching (universal or directional switching) of the wheel assembly, and has compact structure.

For example, in fig. 14 and 15, in one embodiment, the linkage assembly 400 includes a first linkage rod 441, a second linkage rod 442, and a third linkage rod 443, wherein one ends of the second linkage rod 442 and the third linkage rod 443 are hinged to each other, and the other ends are respectively hinged to the second element 120 and the third element 130, and one end of the first linkage rod 441 is eccentrically hinged to the linkage member 430 (relative to the axis of the receiving joint), and the other end is hinged to the second linkage rod 442 and/or the third linkage rod 443. So that there are no remaining hinge points on the first element 110 and the appearance is more compact.

In an embodiment, referring to fig. 14, in the unfolded state, the linkage 430 abuts against the first linkage rod 441, so as to improve the structural strength and the unfolding positioning in the unfolded state.

Referring to fig. 16 and 17, the first locking member 410 and the first element 110 have a first inclined surface 4112 that cooperates with each other, and when the first element 110 rotates, the first locking member 410 is driven to move axially. The method for realizing axial movement comprises the following steps: the first locking member 410 and the first element 110 have first inclined surfaces 4112 that cooperate with each other, and when the first element 110 rotates, the first locking member 410 is driven to move axially, and finally the first locking member is in the unlocking position.

In order to realize the linkage between the first element and the other two elements, referring to fig. 16 to 22, the first element 110 has a rotating shaft 190 extending along an axial direction, the rotating shaft 1390 is of a hollow structure and is sleeved on the outer periphery of the coupling portion 411, and a key slot structure extending along the axial direction is provided between the two, and when the first locking member 410 is in the unlocking position, the first element 110 drives the first locking member 410 to rotate through the key slot structure. The key way structure has an interaction to achieve the interlocking of the rotation shaft 190 and the coupling 411, and the key way structure does not interact in the initial stage of the first member 110. The method comprises the following specific steps:

the coupling portion 411 is provided with a first protruding key 4111, and the inner wall of the rotation shaft 190 is radially protruding with a first stopper 1921, and in the locked state, a gap is provided between the first protruding key 4111 and the first stopper 1921 in the rotation direction of the first element 110. Wherein, the gap is equal to 0 when the first element 110 rotates to drive the first locking element 410 to be at the unlocking position, that is, the first protruding key 4111 and the first stop 1921 abut against each other (as shown in fig. 21 and 22), so that the switching of the linkage element 430 to the unlocking position is not affected. But the positions of the first protruding key 4111 and the corresponding first inclined surface 4112 of the first element 110 may be kept unchanged, and during the process of waiting for deployment, the two first inclined surfaces 4112 immediately release the interaction, and after the first locking member 410 is aligned with the second cavity, the first locking member is reset to the locking position.

In one embodiment, the coupling portion 411 is cylindrical, the first protruding key 4111 is disposed adjacent to the proximal end and the first inclined surface is disposed on the first protruding key 4111.

With continued reference to fig. 18 to 22, in an embodiment, the second protruding key 4113 is protruding at the distal end of the outer periphery of the coupling portion 411, the second protruding key and the first protruding key 4111 are flush with each other near the end surface of one side of the first stop 1921, when the first locking member 410 is in the unlocking position, the first stop 1921 abuts against the second protruding key 4113 and the first protruding key 4111, and the first member continues to rotate, so that the linkage member 430 is driven to rotate synchronously by the rotating shaft 190. The inner wall of the rotating shaft 190 is further provided with a second stop block 1922 in a protruding manner, the second stop block 1922 and the first stop block 1921 are located at two sides of the first protruding key 411 in the circumferential direction, and when the first locking piece 410 is located at the locking position in the unfolding process, the second stop block 1922 abuts against the first protruding key 4113 to assist in unfolding and positioning.

Referring back to fig. 16, the locking portion 412 is cylindrical, and a plurality of first latches 4121 with different shapes are protruding on the outer periphery, and the circumferential distances between two adjacent first latches 4121 are the same or different, so that in the unfolded state, the first cavity and the second cavity match with the shape of the locking portion 412. The first latch 410 is restrained from being reset to the latched position during rotation.

Referring back to fig. 7 to 13, in an embodiment in which the folding joint includes a fourth member 140 rotatable about an axis, the first member 110 and the fourth member 140 are located at both sides of the folding joint in an axial direction, the second member 120 and the third member 130 are located in a space between the first member 110 and the fourth member 140, the first locking member 410 penetrates the second member 120 and the third member 130, the second member 120 is provided with a mounting groove for rotatably mounting the third member 130, and the link member 430 is interposed between the second member 120 and the fourth member 140. The fourth element 140 may be used to mount accessories such as child seats, child bassinets, and the like.

Wherein a first locking mechanism is provided between the fourth member 140 and the linkage member 430, and the first locking mechanism is driven to unlock when the first locking member 410 moves from the locking position to the unlocking position.

The first locking mechanism includes a first locking pin 141 movably fitted to the fourth member 140, a second elastic member 142 acting on the first locking pin 141, and a first locking groove 432 provided on the link 430, and the first locking member 410 has an unlocking portion 413 pushing the first locking pin 141 out of the first locking groove 432. Then, at the initial stage of the rotation of the first element 110, the operation of unlocking the first locking structure is performed simultaneously, so that the fourth element can rotate due to the gravity nearby, for example, the child seat can be folded naturally, and the operation is convenient. In one embodiment, a torsion spring 143 is disposed between the fourth member 140 and the linkage 430 to urge the fourth member 140 to return, during which the first locking pin 141 is aligned with and extends into the first locking slot 432.

In an embodiment, the unlocking portion 413 and the first locking pin 141 are located at two sides of the linkage member, the unlocking portion 413 is a protrusion disposed on the locking portion 412 and extending away from the first end along the axial direction, and the first locking groove 432 penetrates through the linkage member 430 and is communicated with the first cavity 431.

Referring to fig. 1-4, the present application further provides a vehicle retracting joint, wherein the first element 110 is connected to the handlebar assembly 210, the second element 120 is connected to the first foot bar assembly 220, the third element 130 is connected to the second foot bar assembly 230, and the fourth element 140 is detachably mounted to the seat assembly 260.

The seat assembly 260 includes a seat 261 and a backrest 262 that are rotatably engaged, and when folded, the backrest 262 rotates to close the seat 261. The handle bar assembly 210 is rotated toward the first leg bar assembly 220 to drive the first latch in the unlatched position while unlocking the first latch mechanism and the seat assembly 260 is rotated entirely toward the second leg bar assembly 230. Continuing to rotate the handle bar assembly 210, the second foot bar assembly 230 is driven to close to the first foot bar assembly 220 by the linkage assembly 400 until the handle bar assembly is fully folded.

Referring to fig. 1-13, and fig. 23, the present application further provides a vehicle retracting joint, including a first element 110, a second element 120 and a third element 130 that can rotate around the same axis, a second locking element 150 that can rotate around the axis and can move along the axial direction and a third elastic element 160 acting on the second locking element 150 are disposed between the first element 110 and the second element 120, two opposite sidewalls of the first element 110 and the second element 120 are respectively provided with a third cavity 111 and a fourth cavity 122 that are matched with the second locking element 150, and the second locking element 150 has a locking position that simultaneously extends into the third cavity 111 and the fourth cavity 122, and a release position that withdraws from the fourth cavity 122 and extends into only the third cavity 111.

The second locking member 150 is configured to limit rotation between the first member and the second member when in the locked position and to permit rotation between the first member and the second member toward and away from the second member when in the unlocked position to perform different functions. For example, in combination with the foregoing embodiment, as an initial operation step of folding the folding joint, after driving the second locking member to switch to the unlocking position (the second locking member 150 is in the locking position in the unfolded state), a subsequent folding step is allowed.

Referring to fig. 24 and 25, in an embodiment, the fourth cavity 122 is rotatably provided with a first driving member 170 for driving the second locking member 150 to switch to the unlocking position. The first driving member 170 is located between the second locking member 150 and the second member 120. A second inclined surface 151 is provided between the second locking member 150 and the first driving member 170, and rotates the second locking member 150 to axially move the second locking member 150.

In order to minimize the axial dimension of the joint, the second locking element 150 has a relief groove 152 which accommodates the first driving element 170 in the locked position, and the second inclined surface 151 is provided at the bottom of the relief groove 152 and at the end face of the first driving element 170. Wherein the distal end face of the relief groove 152 is flush with the distal end face of the second locking member 150 when the second locking member 150 is in the locked position.

Specifically, the second protrusion 153 with the second inclined surface 151 is protruding at the bottom of the avoidance groove along the axial direction, and the first driving member 170 is concavely provided with the second guiding groove 171 with the second inclined surface 151.

In an embodiment, the second locking member 150 is cylindrical, the outer periphery of the second locking member is convexly provided with a plurality of second latches 154 with different shapes, the circumferential distances between two adjacent second latches 154 are the same or different, and in the unfolded state, the third cavity 111 and the fourth cavity 122 are matched with the shapes of the second locking member 150. The second locking member 150 is restrained from returning to the locked position during rotation.

Referring to fig. 24-27, in one embodiment, the first member 110 has a radially extending hollow connecting rod 113, the connecting rod 113 being primarily used to connect other bars of the child carrier, such as a handlebar assembly. The connecting rod 113 is provided with a first pull wire 180 which acts on the first driving member 170 to rotate, and the second locking member 150 is used for the first pull wire 180 to pass through and enter the avoidance groove 152 and then is connected with the notch 155 of the first driving member 170.

The present application places a second locking member that holds the joint in the unfolded state between the first member and the second member, and places a first driving member that drives the second locking member to switch positions in the second locking member. The function is added, and meanwhile, the volume of the vehicle collecting joint is kept unchanged as much as possible.

According to the child stroller, the wheel state is switched by rotating the handle rod assembly to adapt to the moving direction of the child stroller, and the child stroller is easier and more convenient to use than the operation piece on the seat assembly or the handle rod is operated by rotating the seat assembly; and elements for switching the wheel states are intensively arranged in the vehicle collecting joint, so that the manufacturing cost of the transmission piece is reduced.

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

The foregoing examples represent only a few embodiments of the present application, which are described in more detail and are not thereby to be construed as limiting the scope of the claims. It should be noted that it would be apparent to those skilled in the art that various modifications and improvements could be made without departing from the spirit of the present application, which would be within the scope of the present application.

Claims (9)

1. The child stroller is characterized by comprising a first foot rod assembly, a second foot rod assembly, a handle rod assembly and a stroller joint, wherein the stroller joint comprises a first element, a second element and a third element which are pivoted around the same axis, the first element, the second element and the third element are respectively fixedly connected with the handle rod assembly, the first foot rod assembly and the second foot rod assembly, and the handle rod assembly is in a first state of inclining towards a first direction and a second state of inclining towards a second direction;

the bottoms of the first foot rod assembly and the second foot rod assembly are respectively rotatably provided with a first wheel assembly and a second wheel assembly, all the wheel assemblies have a universal state capable of freely rotating in a horizontal plane and an orientation state capable of advancing only along a fixed direction, positioning lock pins controlled by the vehicle collecting joints through transmission assemblies are arranged on the two foot rod assemblies, the handle rod assemblies are switched from a first state to a second state, the first wheel assemblies are switched from the orientation state to the universal state, and the second wheel assemblies are switched from the universal state to the orientation state;

the first element is provided with a rotating shaft which is pivotally connected with the second element and the third element, and a first abutting part and a second abutting part which act on corresponding transmission assemblies to enable the wheel assemblies to be switched between various states are arranged on the rotating shaft.

2. The stroller of claim 1, wherein the first and second wheel assemblies are provided with detent recesses for engagement with detent pins, and fourth resilient members for urging the detent pins into the detent recesses;

the transmission assembly comprises a transmission piece which is linked with the positioning lock pin through a stay wire and is matched with the handle rod assembly, and a fifth elastic piece which acts on the transmission piece to reset the transmission piece, wherein the elastic force of the fifth elastic piece is larger than that of the fourth elastic piece, so that the transmission piece resets to drive the positioning lock pin to exit the positioning lock groove.

3. A stroller according to claim 2, wherein the first and second abutments act on the respective transmission member to cause the state of each wheel assembly to switch.

4. A stroller according to claim 3, comprising a first axially movable locking member and a linkage member rotatable about said axis, said first locking member comprising a coupling portion for cooperation with said spindle and a locking portion interposed between said linkage member and a second member, and having a locked state in which said locking portion is coupled with said second member and a released state out of said second member.

5. The stroller of claim 4, wherein the rotating shaft is of a hollow structure and is sleeved on the periphery of the connecting part, and a limiting mechanism is arranged between the rotating shaft and the connecting part;

the limit mechanism comprises:

the second convex key is arranged on the periphery of the connecting part;

the first stop block is arranged in the rotating shaft, and when the handle rod assembly is in the second state, the first stop block abuts against the second convex key.

6. The stroller of claim 4, wherein the pivot comprises a first section and a second section nested with each other, the second abutment is disposed on the first section, the first abutment is disposed on the second section, and the second abutment and the first abutment are disposed in a staggered arrangement in a circumferential direction.

7. The stroller of claim 6, wherein the second section is cylindrical and the first abutment is a tab disposed on an outer periphery of the second section.

8. The stroller of claim 6, wherein the first section is cylindrical and has a radially extending flange at one end, a portion of the flange further extending radially to form the second abutment.

9. The stroller of claim 4, comprising a first resilient member acting on the locking portion of the first locking member in a locked state.