Frame assembly of stroller

Abstract

The utility model provides a frame assembly for a baby stroller, which comprises a main supporting rod, a main supporting rod, a main supporting rod, an auxiliary supporting rod and an auxiliary supporting rod, the main supporting rod is provided with an upper end part and a lower end part, the upper end part is used for mounting a grip part, and the lower end part is used for rotary connection; the seat pocket support part comprises a first end for rotary connection and a second end opposite to the first end; and a front wheel stay bar and a rear wheel stay bar. The frame assembly further comprises a folding mechanism, the folding mechanism comprises a first part and a second part which can relatively rotate around a rotation axis A, the lower end of the main supporting rod is fixed to the first part, the first end of the rear wheel supporting rod is fixed to the second part, and the first part of the folding mechanism is provided with a main pivot part. The rear end part of the front wheel supporting rod is pivotally connected to the main pivoting part; the second portion of the folding mechanism is provided with a secondary pivot portion to which the rear end portion of the seat pocket bracket portion is pivotally connected. According to the frame assembly, the problem of clamping stagnation possibly occurring in the folding or unfolding process of the cart is solved, the number of parts is smaller, and assembling is easier.

Description

Technical Field

[0001] The utility model relates to the technical field of a child stroller, and more specifically, to a foldable child stroller. Background Art

[0002] A child stroller is an essential means of transportation for children to travel. In order to facilitate carrying, various types of foldable strollers are available on the market. Such foldable strollers can be changed between an unfolded state for use and a folded and portable state through a folding mechanism.

[0003] A lightweight folding stroller usually comprises a foldable frame assembly, which includes a main support rod, a support rod for mounting wheels, and a support member for supporting a seat pocket. These support rods and support rods are movably connected together by a pivot mechanism and a lever mechanism. Usually, some of the support members or the support rods are constructed into a plurality of foldable sections.

[0004] However, during the change of the use state of this type of stroller, since the pivot mechanism and the folding structure of the support member or the strut are independent of each other, the force transmission during the folding process is likely to be unsmooth, resulting in a jam in the folding or unfolding process. On the other hand, the assembly of the strut and the support member of the existing frame assembly is relatively complicated and the manufacturing efficiency is not high.

[0005] Therefore, it is hoped that the folding structure of the child stroller can be improved so that the folding and unfolding process is smoother and the assembly structure is simplified. Utility Model Content

[0006] To overcome the deficiencies of the prior art, the utility model provides a frame assembly for a child stroller, the frame assembly comprising: a main support rod, the main support rod having an upper end for mounting a handle portion and a lower end for rotational connection; a seat support portion, the seat support portion comprising a first end for rotational connection and a second end opposite to the first end; and a front wheel support rod and a rear wheel support rod; wherein the frame assembly also includes a folding mechanism, the folding mechanism comprising a first part and a second part which can rotate relative to each other around a rotation axis A, the lower end of the main support rod being fixed to the first part, the first end of the rear wheel support rod being fixed to the second part, the first part of the folding mechanism being provided with a main pivot portion, the rear end of the front wheel support rod being pivotally connected to the main pivot portion; the second part of the folding mechanism being provided with a secondary pivot portion, the rear end of the seat support portion being pivotally connected to the secondary pivot portion.

[0007] According to one aspect of the utility model, the first part has a first main body portion that is roughly cylindrical, a portion of the circumferential surface of the first main body portion is radially recessed to form a first recess, and the main pivot portion is arranged in the first recess; the second part has a second main body portion that is roughly cylindrical, a portion of the circumferential surface of the second main body portion is radially recessed to form a second recess, and the secondary pivot portion is arranged in the second recess.

[0008] According to another aspect of the utility model, the second parts of the folding mechanism are arranged in pairs, and the paired second parts are respectively installed on the axial sides of the first part along the rotation axis A, and each of the second parts is provided with a secondary pivoting portion.

[0009] According to another aspect of the utility model, the seat support portion includes a left support rod and a right support rod, the left support rod and the right support rod are symmetrically arranged about the main support rod and the front wheel support rod, and the rear ends of the left support rod and the right support rod are respectively inserted into the first recess and the second recess and connected to the secondary pivot portion.

[0010] According to another aspect of the utility model, the left support rod and the right support rod are pivotally connected to both sides of the front wheel support rod respectively.

[0011] According to another aspect of the present invention, the folding mechanism further includes a locking device, which is installed between the first part and the second part to lock or unlock the relative rotation of the first part and the second part.

[0012] According to another aspect of the utility model, the locking device includes: a limit pin installed in the first part; a card installed on the surface of the second part opposite to the first part; and a return spring that provides elastic force to the limit pin; when the limit pin is engaged with the card, the relative rotation of the first part and the second part is locked, and when the limit pin disengages from the card against the elastic force of the return spring, the relative rotation of the first part and the second part is unlocked.

[0013] According to another aspect of the utility model, the main support rod includes a first section and a second section, the first section is inserted into the second section and can extend and retract relative to the second section; wherein an actuating portion is provided at the lower end of the first section, when the first section is fully inserted into the second section, the actuating portion engages with the limit pin and moves the limit pin in a direction of disengaging from the metal card.

[0014] According to another aspect of the utility model, the first part has a roughly cylindrical first main body portion and a first connecting portion extending integrally from a circumferential surface of the first main body portion in a direction perpendicular to the rotation axis A, and the first connecting portion is used to plug and connect to the lower end portion of the main support rod; the second part has a roughly cylindrical second main body portion and a second connecting portion extending integrally from a circumferential surface of the second main body portion in a direction perpendicular to the rotation axis A, and the second connecting portion is used to plug and connect to the upper end portion of the rear wheel support rod.

[0015] According to another aspect of the present invention, the frame assembly has a folded state and an expanded state. When the frame assembly is in the folded state and the expanded state, the relative positions of the main pivot and the auxiliary pivot relative to the rotation axis A remain unchanged.

[0016] As a result, the main pivot and auxiliary pivot that provide the frame assembly with folding movement are built into the relatively rotating part of the folding mechanism, and the various struts that make up the frame assembly no longer have folding parts or pivot parts. The force is transmitted inside the folding mechanism, so the folding process is not prone to jamming.

[0017] In addition, the child stroller according to the utility model integrates multiple pivoting parts into the main body of the folding mechanism, which reduces the number of parts, facilitates the positioning and connection of each support rod, and also simplifies the assembly steps. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] For a more complete understanding of the present invention, reference may be made to the following description of exemplary embodiments considered in conjunction with the accompanying drawings, in which:

[0019] Figure 1 A three-dimensional view of a child stroller according to a preferred embodiment of the utility model is shown, wherein the child stroller is in an unfolded state.

[0020] Figure 2 Another stereoscopic view of a child stroller according to a preferred embodiment of the utility model is shown, wherein the child stroller is in a folded state.

[0021] Figure 3 A three-dimensional view of a frame of a child stroller according to a preferred embodiment of the utility model is shown, wherein the frame is in an unfolded state.

[0022] Figure 4 Another stereoscopic view of the frame assembly of the child stroller according to the preferred embodiment of the utility model is shown, wherein the frame is in a folded state.

[0023] Figure 5A - Figure 5C Schematic diagrams showing different states of the frame assembly of the child stroller according to the preferred embodiment of the utility model when folded are shown in sequence.

[0024] Fig. 6A A schematic diagram showing the locking position of a locking device of a child stroller according to a preferred embodiment of the utility model.

[0025] Figure 6B The figure shows the unlocking position of the locking device of the child stroller according to the preferred embodiment of the utility model.

[0026] Fig. 7A A schematic diagram showing the cooperation between the limit latch and the card according to a preferred embodiment of the utility model is shown.

[0027] Figure 7B A schematic diagram of a rear wheel support rod equipped with a card according to a preferred embodiment of the utility model is shown.

[0028] Figure 8 The figure shows an exploded perspective view of a frame assembly of a child stroller according to a preferred embodiment of the utility model.

[0029] Reference numerals list

[0030] 1 Stroller

[0031] 10 frame components

[0032] 11 Main support pole

[0033] 111 Part 1

[0034] 112 Part 2

[0035] 113 Actuator

[0036] 12 Seat support bracket

[0037] 121 Left support rod

[0038] 122 right strut

[0039] 13 Front wheel support rod

[0040] 15 Rear wheel support rod

[0041] 20 Folding mechanism

[0042] 21 Part 1

[0043] 211 First Main Body

[0044] 212 first connection part

[0045] 213 first recess

[0046] 25 Part 2

[0047] 251 Second main body

[0048] 252 second connection part

[0049] 253 Second recess

[0050] 31 limit pin

[0051] 32 cards

[0052] 40 Grip

[0053] 50 seat pocket

[0054] 60 bottom pocket

[0055] 71 front wheel

[0056] 72 rear wheel

[0057] 73 handle

[0058] Rotation axis A DETAILED DESCRIPTION

[0059] The present invention is further described below in conjunction with specific embodiments and drawings. More details are elaborated in the following description to facilitate a full understanding of the present invention. However, the present invention can obviously be implemented in a variety of other ways different from the description. Those skilled in the art can make similar generalizations and deductions based on actual application situations without violating the connotation of the present invention. Therefore, the protection scope of the present invention should not be limited by the content of this specific embodiment.

[0060] In the following detailed description, terms indicating directions such as “front”, “rear”, “top / upper”, and “bottom / lower” are defined based on the directions when the stroller is in a normal use state.

[0061] Figure 1 and Figure 2 The foldable stroller 1 according to the present invention is shown in two different states, wherein Figure 1 The child stroller 1 is shown in an unfolded state for a child to sit in (i.e., a normal use state). Figure 2 The child stroller 1 is shown in a folded state for easy carrying and storage. The child stroller 1 mainly includes a frame assembly 10 and a seat pocket 50 supported by the frame assembly 10. A front wheel 71, a rear wheel 72 and a bottom pocket 60 for placing items are installed at the bottom of the frame assembly 10. As the frame assembly 10 is expanded and folded, the soft seat pocket 50 will be expanded and folded accordingly.

[0062] like Figure 1 , Figure 2 and Figure 8As shown, the frame assembly 10 includes a main support rod 11, a seat support portion 12, a front wheel support rod 13, a rear wheel support rod 15, and a folding mechanism 20. The folding mechanism 20 integrates a plurality of pivoting parts to realize the mutual rotation between the main support rod 11, the seat support portion 12, the front wheel support rod 13, and the rear wheel support rod 15, so as to realize the unfolded state and the folded state of the child stroller 1.

[0063] In a preferred embodiment, the main support rod 11 has an upper end and a lower end, the upper end of the main support rod 11 is equipped with a handle portion 40, and the lower end of the main support rod 11 is connected to the folding mechanism 20 to achieve its rotation relative to other support rods or rods. The main support rod 11 includes a first section 111 and a second section 112, the first section 111 is inserted into the second section 112 from its lower end and can extend and retract relative to the second section 112. The first section 111 and the second section 112 are both hollow tubes, the handle portion 40 is installed at the upper end of the first section 111, and the lower end of the second section 112 is connected to the folding mechanism 20.

[0064] The seat support portion 12 of the frame assembly 10 includes a left support rod 121 and a right support rod 122, which are symmetrically arranged with respect to the main support rod 11 and the front wheel support rod 13. Each of the left support rod 121 and the right support rod 122 includes a front end portion and a rear end portion, and the front end portions of the left support rod 121 and the right support rod 122 are attached to the seat portion 50 by means of a connecting portion, usually attached below the seat portion of the seat portion 50. When the child stroller 1 is in the unfolded state, the left support rod 121 and the right support rod 122 can hold and tension the seat portion 50. On the other hand, the rear ends of the left support rod 121 and the right support rod 122 are attached to the folding mechanism 20. In addition, the left support rod 121 and the right support rod 122 are also pivotally connected to opposite sides of the front wheel support rod 13 at a position close to the folding mechanism 20, respectively. According to a preferred embodiment of the present invention, the left support rod 121 and the right support rod 122 of the seat bag support portion 12 are both rods formed integrally.

[0065] The front wheel stay 13 of the frame assembly 10 extends from front to rear, and a cross beam is provided at the front end of the front wheel stay 13, and two front wheels 71 are respectively mounted on both ends of the cross beam. The rear wheel stays 15 of the frame assembly 10 are arranged in pairs, that is, the rear wheel stays 15 include a first rear wheel stay and a second rear wheel stay, which are symmetrically arranged about the main stay 11 and the front wheel stay 13. Each of the first rear wheel stay and the second rear wheel stay includes an upper end attached to the folding mechanism 20 and a lower end mounted with the rear wheel 72. Preferably, the first rear wheel stay and the second rear wheel stay are respectively integrally formed rods. In addition, in order to improve the stability of the frame assembly, the frame assembly 10 also includes a transverse stay installed between the rear wheels 72.

[0066] According to the present invention, the folding mechanism 20 is particularly integrated with a plurality of pivoting parts to provide relative rotation between the main support rod 11, the seat support part 12, the front wheel support rod 13 and the rear wheel support rod 15 of the frame assembly 10. Specifically, as Figure 8 As shown, the folding mechanism 20 mainly includes a folding mechanism that can rotate around an axis A (see Figure 4 ) The first part 21 and the second part 25 that can rotate relative to each other. The first part 21 and the second part 25 that can rotate relative to each other constitute a pivoting portion, which mainly provides relative rotation between the main support rod 11 and the rear wheel support rod 15.

[0067] The first part 21 has a first main body 211 that is generally cylindrical or disc-shaped and a first connecting part 212 that extends integrally from the circumference of the first main body 211, wherein the extending direction of the first connecting part 212 is substantially perpendicular to the rotation axis A, and is used to connect the lower end of the main support rod 11. The second parts 25 of the folding mechanism 20 are arranged in pairs, and the paired second parts 25 are respectively installed and rotatably installed on both sides of the axial direction of the first part 21 along the rotation axis A. Each second part 25 has a second main body 251 that is generally cylindrical and a second connecting part 252 that extends integrally from the circumference of the second main body 251, wherein the extending direction of the second connecting part 252 is substantially perpendicular to the rotation axis A, and is used to connect the upper end of the rear wheel support rod 15. Preferably, the first connecting part 212 and the second connecting part 252 are formed as a receiving seat with a hollow cavity, and the corresponding ends of the main support rod 11 and the rear wheel support rod 15 are inserted into the receiving seat and fixed.

[0068] like Figure 8 As shown, the first part 21 is provided with a main pivot, which is preferably arranged in a first recess 213 formed by recessing from the circumferential surface of the first part 21, and the main pivot provides relative rotation between the main support rod 11 and the front wheel support rod 13. Specifically, the main pivot can be built into a pivot rod in the first part 21, and a corresponding pivot hole is provided at the lower end of the main support rod 11, and the pivot rod passes through the pivot hole to provide pivoting movement.

[0069] The two second parts 25 on both axial sides of the first part 21 are respectively provided with auxiliary pivoting parts, which are respectively arranged on the circumferential surface of the second part 25 and radially recessed to form a second recess 253 (see Figure 2 ) to provide the left and right support rods of the seat support part 12 with respect to the rear wheel support rod 15. The left support rod 121 and the right support rod 122 of the seat support part 12 are respectively in a straight line with respect to the rotation axis of the rear wheel support rod 15. The auxiliary pivoting part can be specifically a pivot rod, which can be an independent component inserted from the surface of the second part 25 relative to the first part 21, and corresponding pivot holes are provided in the rear ends of the left support rod 121 and the right support rod 122, and the pivot rod passes through the pivot holes to realize the pivoting movement of the rear wheel support rod 15.

[0070] In addition, the folding mechanism 20 further comprises a locking device, which is configured to lock or unlock the relative rotation of the first part 21 and the second part 25. Preferably, the locking device is installed between the first part 21 and the second part 25 of the folding mechanism 20.

[0071] In a preferred embodiment, if Fig. 7A and Figure 7B As shown, the locking device includes a limit latch 31 and a card 32. The limit latch 31 is installed in the first main body 211 of the first part 21. In a preferred embodiment, the limit latch 31 is arranged in pairs, that is, it includes a left limit latch and a right limit latch. The card 32 is usually a metal sheet, which is installed on the surface of the second main body of the second part 25 of the folding mechanism 20 opposite to the first part 21. In addition, the latch device also includes a return spring that provides elastic force to the limit latch 31. The elastic force provided by the return spring keeps the latch 31 engaged with the corresponding hole on the card 32, thereby preventing the first part 21 from rotating relative to the second part 25; when the limit latch 31 resists the elastic force of the return spring and disengages from the metal card 32, the relative rotation of the first part 21 and the second part 25 is unlocked. The card 32 can be provided with two card holes to correspond to the unfolded state and the folded state of the cart. In other alternative embodiments, the card 32 can also be replaced by a plurality of card holes formed integrally in the second part 25.

[0072] In a preferred embodiment, the unlocking of the locking device is actuated by the relative sliding of the two sections of the main support rod 11. Specifically, the lower end of the first section 111 of the main support rod 11 is provided with an actuating portion 113. When the first section 111 is fully inserted into the hollow cavity of the second section 112, the actuating portion 113 is actuated. Figure 6B As shown, the actuating portion 113 engages with the limiting latch 31 to move the limiting latch 31 in a direction of disengaging from the card 32 , that is, the two limiting latches 31 move inward toward each other, thereby disengaging from the engagement of the card 32 .

[0073] In other alternative embodiments, a resolution button may be directly provided on the folding mechanism 20 to move the limiting latch 31 to unlock the relative rotation of the first part 21 and the second part 25 of the folding mechanism 20 .

[0074] In addition, if Figure 4 As shown, a handle portion 73 is also provided on the first main body portion 211 of the first part 21 of the folding mechanism 20, so that the user can carry the folded child stroller 1. The handle portion 73 can be integrally formed on the first main body portion 211, or fixed by a fastener.

[0075] FIG. 5A to FIG. 5C FIG. 2 shows the folding process of the stroller 1 according to the present invention. Figure 5AThe stroller 1 shown in the figure has begun to fold. At this time, the first section of the main support rod 11 has retracted into the hollow cavity of the second section. At this time, the actuating portion 113 at the lower end of the first portion 21 is engaged with the limit latch 31 of the folding mechanism 20, so that the limit latch 31 is disengaged from the card 32, and the main support rod 11 rotates around the rotation axis A toward the front wheel support rod 13. Figure 5B As shown, as the folding proceeds, the rear wheel support rod 15 also rotates around the rotation axis A toward the front wheel support rod 13. At the same time, with the help of the main pivot and the secondary pivot, the front wheel support rod 13 and the two support rods of the seat support portion 12 rotate toward the folded position, and finally the seat is folded into Figure 5C Shown in collapsed state.

[0076] During the folding process of the stroller 1 according to the present invention, the pivoting movement of each support rod and support bar of the frame assembly 10 is provided by the folding mechanism 20, that is, by the main and auxiliary pivoting parts built into the main body parts of the first part 21 and the second part 25 of the folding mechanism 20 and the relative pivoting of the first and second parts 21. In the folded state and the unfolded state of the frame assembly 10, the relative positions of the main pivoting part and the auxiliary pivoting part relative to the rotation axis A remain unchanged. Therefore, the main pivoting part and the auxiliary pivoting part are respectively built into the relatively rotating parts of the folding mechanism 20, and the support rods constituting the frame assembly 20 are no longer provided with a folding structure, so it is not easy to get stuck during the folding process.

[0077] In addition, the child stroller 1 according to the utility model integrates multiple pivoting parts into the main body of the folding mechanism, which reduces the number of parts, facilitates the connection between the support rods and the supporting rods, and simplifies the assembly steps.

[0078] Although the utility model is disclosed as above with preferred embodiments, it is not intended to limit the utility model. Any person skilled in the art can make possible changes and modifications without departing from the spirit and scope of the utility model. Therefore, any modification, equivalent change and modification made to the above embodiments based on the technical essence of the utility model without departing from the content of the technical solution of the utility model shall fall within the protection scope defined by the claims of the utility model.

Claims

1. A frame assembly for a child stroller, the frame assembly comprising: A main support rod, the main support rod having an upper end for mounting a handle portion and a lower end for rotational connection; A seat support portion, the seat support portion having a front end portion and a rear end portion for rotational connection; as well as A front wheel stay and a rear wheel stay, wherein the front wheel stay has a front end and a rear end for rotational connection, and the rear wheel stay has an upper end and a lower end for rotational connection; The frame assembly further comprises a folding mechanism, the folding mechanism comprising a first part and a second part which are relatively rotatable around a rotation axis A, the lower end of the main support rod is connected to the first part, and the upper end of the rear wheel support rod is fixed to the second part. The first portion of the folding mechanism is provided with a main pivot portion to which the rear end of the front wheel stay is pivotally connected; The second portion of the folding mechanism is provided with a secondary pivot portion, to which a rear end portion of the seat pocket support portion is pivotally connected.

2. The frame assembly according to claim 1, characterized in that: The first part has a substantially cylindrical first main body portion, a portion of a circumferential surface of the first main body portion is recessed to form a first recess, and the main pivot portion is disposed in the first recess; The second part has a substantially cylindrical second main body portion, a portion of a circumferential surface of the second main body portion is recessed to form a second recessed portion, and the auxiliary pivoting portion is disposed in the second recessed portion.

3. The frame assembly according to claim 1, characterized in that: The second parts of the folding mechanism are arranged in pairs. The second parts in pairs are rotatably mounted on both axial sides of the first part along the rotation axis A, and each of the second parts is internally provided with the auxiliary pivoting part.

4. The frame assembly according to claim 3, characterized in that: The seat support portion includes a left support rod and a right support rod, and the left support rod and the right support rod are symmetrically arranged with respect to the main support rod and the front wheel support rod. And the rear ends of the left support rod and the right support rod are respectively inserted into the second recessed portions of the second portion and connected to the secondary pivoting portion.

5. The frame assembly according to claim 4, characterized in that: The left support rod and the right support rod are pivotally connected to both sides of the front wheel support rod respectively.

6. The frame assembly according to claim 1, wherein: The folding mechanism further comprises a locking device installed between the first part and the second part to lock or unlock the relative rotation of the first part and the second part.

7. The frame assembly according to claim 6, characterized in that: The locking device comprises: A stopper pin installed in the first part; A card mounted to a surface of the second portion opposite to the first portion; and A return spring providing elastic force to the limit latch; When the limit pin is engaged with the card, the relative rotation of the first part and the second part is locked, and when the limit pin disengages from the card against the elastic force of the return spring, the relative rotation of the first part and the second part is unlocked.

8. The frame assembly according to claim 7, wherein: The main support rod comprises a first section and a second section, when the first section is inserted into the second section and can extend and retract relative to the second section; An actuating portion is provided at the lower end of the first section. When the first section is fully inserted into the second section, the actuating portion engages with the limiting latch and moves the limiting latch in a direction of disengaging from the card.

9. The frame assembly according to claim 2, wherein: The first part comprises a substantially cylindrical first main body portion and a first connecting portion extending integrally from a circumferential surface of the first main body portion in a direction perpendicular to the rotation axis A, wherein the first connecting portion is used to connect the lower end portion of the main support rod; The second portion includes a substantially cylindrical second main body portion and a second connecting portion extending integrally from a circumferential surface of the second main body portion in a direction perpendicular to the rotation axis A, wherein the second connecting portion is used to connect to an upper end portion of the rear wheel stay.

10. The frame assembly according to claim 1, wherein: The frame assembly has a folded state and an unfolded state. In the folded state and the unfolded state of the frame assembly, the relative positions of the main pivot portion and the auxiliary pivot portion relative to the rotation axis A remain unchanged.

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