Child stroller frame

Abstract

To provide an improved stroller frame that can be more convenient in use and address at least the conventional issues described in the present disclosure.SOLUTION: A child stroller frame includes a first frame portion, a second frame portion, a pivoting part and a linkage. The second frame portion has a front end and a rear end, the front end being pivotally connected with the first frame portion. The pivoting part has one end fixedly connected with a rear wheel support member and the other end pivotally connected with the rear end of the second frame portion. The linkage movably couples the first frame portion to the pivoting part, and has a plurality of bars. The plurality of bars includes a curved bar having a recessed surface configured to prevent obstructing interference with the rear wheel support member and / or the pivoting part during folding movement.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS This application is a divisional application of Patent Application No. 2023-139031, which is a divisional application of Patent Application No. 2022-132575, which is a divisional application of Patent Application No. 2021-539590, and claims priority to Chinese Patent Application No. 201910019182.X filed on January 8, 2019.

[0002] The present invention relates to a child stroller frame. [Background technology]

[0003] A child stroller device is generally constructed from a frame structure that can be folded for storage or transportation and unfolded for use. Some existing stroller frame structures may be equipped with a separate folding mechanism for the rear wheels, and the caregiver must operate the stroller frame and the rear wheel folding mechanism separately to fold the child stroller device. This type of stroller frame is more cumbersome to use, since it requires multiple operation steps to fold the stroller device. Moreover, the rear wheel folding mechanism is usually placed in a lower position, so the caregiver must bend down to operate the folding mechanism.

[0004] Thus, there is a need for an improved stroller frame that is more convenient to use and that can address at least the problems discussed above. Summary of the Invention

[0005] The present application describes a child stroller frame that can be folded and unfolded in a convenient manner.

[0006] According to one aspect, a child stroller frame includes a first frame portion, a second frame portion, a pivot, and a linkage. The second frame portion has a front end and a rear end, the front end being pivotally connected to the first frame portion. The pivot has one end fixedly connected to the rear wheel support member and the other end pivotally connected to the rear end of the second frame portion. The linkage movably couples the first frame portion to the pivot, the linkage including a plurality of bars, the bars including curved bars having a concave surface configured to prevent disruptive interference with the rear wheel support member and / or the pivot during a folding operation. [Brief description of the drawings]

[0007] [Figure 1] FIG. 1 is a perspective view illustrating one embodiment of a child stroller frame in an unfolded state. [Diagram 2] FIG. 2 is a perspective view illustrating the child stroller frame of FIG. 1 in a partially folded state. [Diagram 3] FIG. 2 is a perspective view illustrating the child stroller frame of FIG. 1 in a fully folded state. [Figure 4] FIG. 2 is a side view illustrating a child stroller frame in an unfolded state with a child seat installed. [Diagram 5] FIG. 2 is a side view of an example child stroller frame in a fully folded position with a car seat installed. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0008] 1-3 are perspective views illustrating one embodiment of a child stroller frame 100 having a foldable rear wheel. With reference to Figs. 1-3, the child stroller frame 100 may include a first frame portion 1, a second frame portion 2, a rear wheel support member 4 coupled to a rear wheel 8, a pivot portion 3, and a coupling portion 5.

[0009] The first frame part 1 may extend upwards and rearwards at an angle to the second frame part 2 when the child stroller frame 1 is unfolded for use, and may have a lower end provided with front wheels 7. The front wheels 7 may be attached to the lower end of the first frame part 1 and in front of the second frame part 2.

[0010] The second frame part 2 may have a front end pivotally connected to the first frame part 1 and a rear end pivotally connected to the pivot 3. According to one example configuration, the second frame part 2 may include a tube segment pivotally connected at an opposite location to the first frame part 1 and the pivot 3 on each of the left and right sides of the child stroller frame 100. The first frame part 1 and the second frame part 2 may rotate relative to each other to fold and unfold the child stroller frame 100.

[0011] The pivot part 3 may have an end fixedly connected to the rear wheel support member 4 and an opposite end pivotally connected to the rear end of the second frame part 2. According to one example configuration, the pivot part 3 may be movable as a single unit. The pivot part 3 may rotate relative to the second frame part 2 to fold the rear wheel support member 4 carried on the pivot part 3 towards the second frame part 2 (the folding direction is indicated by the arrow P in FIG. 1 ) or to unfold the rear wheel support member 4 away from the second frame part 2.

[0012] The link 5 can movably couple the first frame part 1 to the pivot part 3, whereby the first frame part 1 and the rear wheel support member 4 carried on the pivot part 3 are movably coupled to fold in a concurrent manner towards the second frame part 2 or unfold in a concurrent manner away from the second frame part 2. More specifically, the link 5 can have first and second opposite ends coupled to the first frame part 1 and the pivot part 3, respectively, and an intermediate part between the first and second ends pivotally connected to the second frame part 2. When the first frame part 1 and the second frame part 2 rotate relative to each other to fold the child stroller frame 100, the pivot part 3 carrying the rear wheel support member 4 thereon can be rotated and folded towards the second frame part 2 due to the coupling of the link 5. Therefore, the rear wheel support member 4 and the rear wheels 8 provided thereon can be conveniently folded together with the folding of the child stroller frame 100 without the caregiver having to take the additional step of bending down to manipulate the rear wheels 8.

[0013] According to one embodiment, the first frame part 1 comprises a handle frame segment 11 and a front leg segment 12 pivotally connected to each other. The second frame part 2 has a front end that can be pivotally connected to either the handle frame segment 11, the front leg segment 12 or a joint 13 that pivotally connects the handle frame segment 11 with the front leg segment 12, and the link 5 has a first end that can be pivotally connected to either the handle frame segment 11, the front leg segment 12 or the joint 13, a second end that pivotally connects to the pivot 3 and an intermediate part between the first and second ends that pivotally connects to the second frame part 2.

[0014] In the example shown in FIG. 1, the front end of the second frame part 2 is pivotally connected to the front leg segment 12 adjacent its front wheel mounting part 14, and a first end of the linkage 5 is pivotally connected to the front leg segment 12. During folding of the child stroller frame 100, the front leg segment 12 can be rotated and folded towards the second frame part 2, and the handle frame segment 11 and the front leg segment 12 can be rotatably folded onto each other. The handle frame segment 11 and the front leg segment 12 can thereby be folded to be located on the same side of one of the second frame parts 2. Furthermore, the pivot part 3 on which the rear wheel support member 4 is held can be urged to rotate and fold simultaneously towards the second frame part 2 due to the coupling of the linkage 5.

[0015] It will be appreciated that other configurations of the child stroller frame 100 may be possible. For example, assume that the front end of the second frame part 2 is pivotally connected to a coupling 13 that pivotally connects the handle frame segment 11 to the front leg segment 12. A first end of the coupling 5 may be pivotally connected to the front leg segment 12 or the handle frame segment 11. During folding of the child stroller frame 100, the handle frame segment 11 may rotate in a counterclockwise direction (i.e., in a direction corresponding to the direction P in FIG. 1 ) relative to the second frame part 2 and fold towards the second frame part 2, and the front leg segment 12 may rotate in a clockwise direction (i.e., in a direction opposite to the direction P) relative to the second frame part 2 and fold towards the second frame part 2. Thereby, the handle frame segment 11 and the front leg segment 12 may be folded respectively to be located on two opposite sides of the second frame part 2. As the handle frame segment 11 and the front leg segment 12 are folded towards the second frame portion 2, the linkage 5 similarly enables the rear wheel support member 4 and the rear wheel 8 mounted thereon to be folded towards the second frame portion 2.

[0016] The rear wheel support member 4 described herein can provide support for mounting the rear wheels 8. Various configurations may be applied to the rear wheel support member 4. According to one example of configuration, the rear wheel support member 4 may include a transverse shaft to which two rear wheels 8 are mounted. According to another example of configuration, the rear wheel support member 4 may include a wheel mount to which one rear wheel 8 is mounted, and two separate sets of the rear wheel support member 4 and the rear wheels 8 are provided on the left and right sides of the second frame portion 2, respectively.

[0017] 1-3, the connecting portion 5 may include a first bar assembly 51 and a second bar assembly 52. ​​The first bar assembly 51 may be pivotally connected to the second frame portion 2 and the pivot portion 3, respectively, and the first bar assembly 51, the pivot portion 3, and the second frame portion 2 may be configured to form a first bar connecting portion. The second bar assembly 52 may be coupled to the first bar assembly 51 and the first frame portion 1, respectively. For example, the first bar assembly 51 may include a first bar 511 pivotally connected to the second frame portion 2, and the second bar assembly 52 may be pivotally connected to the first bar 511 and the first frame portion 1, respectively. The second bar assembly 52, the first bar 511, the first frame portion 1, and the second frame portion 2 may be configured to form a second bar connecting portion. Relative rotation between the first frame part 1 and the second frame part 2 in the folding direction causes the first bar 511 to rotate relative to the second frame part 2, thereby folding the first bar connection part and rotating the pivot part 3 to fold the rear wheel support member 4 towards the second frame part 2. In other words, the first bar assembly 51 and the second bar assembly 52 are operable to drive the rear wheel support member 4 to fold towards the second frame part 2 when the first frame part 1 rotates relative to the second frame part 2 in the folding direction.

[0018] 1-3, the first bar assembly 51 and the second bar assembly 52 may be located inside the pivot part 3 to prevent environmental interference during use. According to an example of configuration, two sets of the first bar assembly 51 and the second bar assembly 52 may be symmetrically provided on the left and right sides of the child stroller frame 100. Furthermore, the child stroller frame 100 may further include a seat mount 6 for installation of a detachable child seat 200. The installed child seat 200 can be folded together with the child stroller frame 100 into a compact form inside the child stroller frame 100.

[0019] 1-3, the first bar assembly 51 may include a plurality of bars. The first bar assembly 51, the second frame portion 2, and the pivot portion 3 are configured to form a first bar connection adapted to fold the pivot portion 3 and the rear wheel support member 4 carried thereon toward the second frame portion 2 during folding of the child stroller frame 100. For example, the first bar assembly 51, the second frame portion 2, and the pivot portion 3 may be configured to form a four-bar connection. According to one example of configuration, the first bar assembly 51 may include a first bar 511 and a second bar 512, the second bar 512 having two opposing ends pivotally connected to the first bar 511 and the pivot portion 3, respectively. The first bar 511 and the second bar 512 of the first bar assembly 51, the second frame portion 2, and the pivot portion 3 may form a first bar connection portion operable to fold the pivot portion 3 and the rear wheel 8 carried thereon towards the second frame portion 2. More specifically, rotation of the first bar 511 relative to the second frame portion 2 in the folding direction may urge the second bar 512 to move and rotate the pivot portion 3 relative to the second frame portion 2 in a direction P for folding towards the second frame portion 2. The second bar 512 may have a shape 5121 configured to achieve a compact folding and prevent disruptive interference with the pivot portion 3 and / or the rear wheel support member 4 during the folding operation. For example, the shape 5121 of the second bar 512 may include a concave downwardly curved profile.

[0020] 1-3, the second bar assembly 52 may include one or more bars. The second bar assembly 52, the first bar 511, the first frame portion 1, and the second frame portion 2 may be configured to form a second bar connection portion. According to one example of the configuration, the second bar connection portion may be a connection portion of four bars. For example, the second bar assembly 52 may include a third bar 521 having two opposing ends pivotally connected to the first bar 511 and the first frame portion 1, respectively. Thereby, the first bar 511, the third bar 521, the first frame portion 1, and the second frame portion 2 may form the second bar connection portion.

[0021] 1-3, the first bar 511 may have two bar portions 5111 and 5112 that cross each other at an angle. The first bar 511 including the bar portions 5111 and 5112 may be integrally formed as a single unit. According to an example of configuration, the bar portion 5111 may have an elongated shape with a length longer than the length of the bar portion 5112. The first bar 511 may be pivotally connected to the second bar assembly 52 at an end of the bar portion 5111, and the bar portion 5112 may extend from the bar portion 5111 towards the second bar 512 at an angle and be pivotally connected to the second bar 512. According to an example of configuration, the second bar 512 has a non-linear shape, and the shape and / or length of the bar portion 5112 may be configured according to a desired folded shape of the first bar 511 and the second bar 512 such that the first bar connecting portion can be folded into a smaller volume. According to one example of configuration, the pivot connection between the first bar 511 and the second frame part 2 can be located in the joining area of ​​the two bar parts 5111 and 5112. According to one example of implementation, the bar part 5112 of the first bar 511, the second bar 512, the second frame part 2 and the pivot part 3 can form a first bar connecting part; the bar part 5111 of the first bar 511, the third bar 521, the second frame part 2 and the first frame part 1 can form a second bar connecting part.

[0022] Furthermore, a limiting structure 53 may be disposed between the bar portion 5111 and the second bar assembly 52. ​​According to one example of a configuration, the limiting structure 53 may include a limiting joint that pivotally couples the bar portion 5111 of the first bar 511 to the third bar 521. When the child stroller frame 100 is in an unfolded state for use, the bar portion 5111 of the first bar 511 and the second bar assembly 52 (particularly, its third bar 521) may form a substantially straight shape extending between the first frame portion 1 and the second frame portion 2, and may provide a stable support for the first frame portion 1. According to one example of a configuration, the first bar 511 may have an L-shape.

[0023] An exemplary operation of the child stroller frame 100 is described below with reference to FIGS. 1-5. When the child stroller frame 100 is to be folded, the first frame portion 1 can be rotated to fold relative to the second frame portion 2. More specifically, the front leg segment 12 can be rotated and folded toward the second frame portion 2, resulting in the folding of the second bar connecting portion. As the second bar connecting portion folds, the first bar 511 rotates relative to the second frame portion 2, which actuates the first bar connecting portion such that the pivot portion 3 rotates in the direction P and folds toward the second frame portion 2. As a result, the rear wheel support member 4 can be moved by the pivot portion 3 to a position adjacent to the second frame portion 2 and before the pivot connection of the second frame portion 2 with the pivot portion 3. Furthermore, since the handle frame segment 11 can be rotated and folded over the front leg segment 12, the size of the first frame portion 1 can be reduced and the child seat 200 can be positioned compactly inside the folded child stroller frame 100.

[0024] When the child stroller frame 100 is to be deployed for use, the handle frame segment 11, the front leg segment 12, and the second frame portion 2 can be counter-rotated relative to each other, which, due to the first and second bar connection portions, causes the pivot part 3 to rotate and deploy from the second frame portion 2. As a result, the rear wheel support member 4 can be moved by the pivot part 3 to a position away from the second frame portion 2 and behind the pivot connection between the second frame portion 2 and the pivot part 3.

[0025] Because the rear wheel support member 4 is movably connected to the child stroller frame 100, the rear wheel support member 4 can be held in an unfolded or folded position without the need for an additional locking mechanism to lock the rear wheel support member 4 in a predetermined position relative to the second frame part 2.

[0026] Advantages of the structure described herein include the ability to provide a child stroller frame with a foldable rear wheel support member, thereby allowing the child stroller frame to be folded into a compact configuration. The rear wheel support member can be movably coupled to other frame portions of the child stroller frame at a linkage, thereby allowing the entire stroller frame to be folded and unfolded in a convenient manner.

[0027] Implementations of a child stroller frame have been described with respect to specific embodiments. These embodiments are intended to be illustrative and not limiting. Many variations, modifications, additions, and improvements are possible. These and other variations, modifications, additions, and improvements may fall within the scope of the invention, as defined in the appended claims. [Additional note 1] A stroller frame for children first and second frame portions, the second frame portion having a front end and a rear end, the front end of the second frame portion pivotally connected to the first frame portion; a pivot portion having one end fixedly connected to a rear wheel support member and another end pivotally connected to a rear end of the second frame portion; a linkage movably coupling the first frame portion to the pivot portion, the linkage having an intermediate portion pivotally connected to the second frame portion, whereby the first frame portion and the rear wheel support member are movably coupled for folding in a concurrent manner toward the second frame portion; Includes child stroller frame. [Additional note 2] The child stroller frame of claim 1, wherein the first frame portion includes a handle frame segment and a front leg segment pivotally connected to each other. [Additional note 3] The child stroller frame described in claim 2, wherein the second frame portion is pivotally connected to either the front leg segment, the handle frame segment, or a joint that pivotally connects the front leg segment to the handle frame segment. [Additional note 4] The child stroller frame described in claim 2, wherein the connecting portion has an end that is pivotally connected to either the front leg segment, the handle frame segment, or a joint that pivotally connects the front leg segment to the handle frame segment. [Additional note 5] The child stroller frame described in appended claim 2, wherein the handle frame segment and the front leg segment are folded so as to be located on the same side of one of the second frame parts, or the handle frame segment and the front leg segment are folded so as to be located on two opposite sides of the second frame part, respectively. [Additional note 6] The connecting portion is a first bar assembly pivotally connected to the pivot portion and the second frame portion, respectively, the first bar assembly including a first bar pivotally connected to the second frame portion, the first bar assembly, the pivot portion, and the second frame portion forming a first bar connecting portion; a second bar assembly pivotally connected to the first bar and the first frame portion, respectively, the second bar assembly, the first bar, the first frame portion, and the second frame portion forming a second bar connecting portion; 6. A child stroller frame as described in any one of claims 1 to 5, comprising: [Additional note 7] The child stroller frame described in claim 6, wherein the first bar assembly includes a second bar having two opposing ends pivotally connected to the first bar and the pivot portion, respectively. [Additional note 8] The child stroller frame described in appended claim 7, wherein the first bar has a first bar portion and a second bar portion, the first bar being pivotally connected to the second bar assembly at an end of the first bar portion, and the second bar portion extending toward and pivotally connected to the second bar. [Additional note 9] The child stroller frame described in claim 8, wherein the first bar portion and the second bar portion cross each other at an angle, and the pivot connection between the first bar portion and the second frame portion is located at the joining area of ​​the first bar portion and the second bar portion. [Additional Note 10] The child stroller frame according to claim 8 or 9, wherein the first bar has an L-shape. [Additional Note 11] 11. The child stroller frame of claim 8, 9 or 10, further comprising a limiting structure disposed between the first bar portion and the second bar assembly, the first bar portion and the second bar assembly forming a substantially straight shape extending between the first frame portion and the second frame portion when the child stroller frame is in an unfolded state for use. [Additional Note 12] The child stroller frame according to any one of claims 7 to 11, wherein the second bar has a shape configured to prevent disruptive interference with the pivot part and / or the rear wheel support member during a folding operation. [Additional Note 13] The child stroller frame of claim 12, wherein the second bar includes a concave downwardly curved profile. [Additional Note 14] The child stroller frame of any one of claims 6 to 13, wherein the second bar assembly includes a third bar having two opposing ends pivotally connected to the first bar and the first frame portion, respectively. [Additional Note 15] The child stroller frame according to any one of claims 1 to 14, wherein the rear wheel support member includes a horizontal axis or a wheel mount.

Claims

1. a first frame portion and a second frame portion, the second frame portion having a front end and a rear end, the front end of the second frame portion pivotally connected to the first frame portion; a pivot portion having one end fixedly connected to a rear wheel support member and another end pivotally connected to the rear end of the second frame portion; a linkage movably coupling the first frame portion to the pivot; Equipped with A child stroller frame, wherein the connecting portion includes a plurality of bars, the bars including curved bars having a concave surface configured to prevent disruptive interference with the pivot portion and / or the rear wheel support member during a folding operation.

2. 2. The child stroller frame of claim 1, wherein the curved bar has one end pivotally connected to the pivot portion.

3. 3. The child stroller frame according to claim 1 or 2, wherein the concave surface of the curved bar faces downward when the child stroller frame is unfolded and standing on a floor surface.

4. 4. The child stroller frame according to any one of claims 1 to 3, wherein the concave surface of the curved bar is adjacent to the rear wheel support member when the child stroller frame is in a folded state.

5. 5. A child stroller frame as described in any one of claims 1 to 4, characterized in that the rear wheel support member moves towards the concave surface of the curved bar when the pivot portion rotates relative to the second frame portion to fold the child stroller frame, and moves away from the concave surface of the curved bar when the pivot portion rotates relative to the second frame portion to unfold the child stroller frame.

6. the curved bar is a first end bar pivotally connected to the pivot portion of the coupling portion, the linkage includes a second end bar pivotally connected to the first frame portion; 6. A child stroller frame as claimed in any one of claims 1 to 5, wherein an intermediate bar is pivotally connected to the first end bar and the second end bar.

7. 7. The child stroller frame of claim 6, wherein the intermediate bar is pivotally connected to the second frame portion.

8. 8. A child stroller frame as claimed in claim 7, wherein the intermediate bar is pivotally connected to the second frame part at a fixed point on the second frame part.

9. 9. A child stroller frame as claimed in claim 7 or 8, characterized in that the two opposite ends of the intermediate bar are movable on two opposite sides of the second frame part during folding of the child stroller frame.

10. the intermediate bar is integrally formed as a single piece having two bar portions intersecting at a predetermined angle with each other; 10. A child stroller frame as claimed in any one of claims 6 to 9, characterized in that the second frame part is pivotally connected to the intermediate bar in the region where the two bar parts of the intermediate bar join together.

11. A child stroller frame according to any one of claims 6 to 10, characterized in that the intermediate bar has an L-shape.

12. A child stroller frame as claimed in any one of claims 1 to 11, characterized in that the rear wheel support member has a transverse axle or wheel mount.

13. 13. A child stroller frame as claimed in any preceding claim, wherein the first frame portion comprises a handle frame segment and a front leg segment pivotally connected to one another.

14. The child stroller frame of claim 13, characterized in that the connecting portion has an end pivotally connected to any one of the front leg segments, the handle segment, and a coupling portion that pivotally connects the front leg segments.

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