A stroller damping structure

Abstract

This utility model discloses a stroller shock absorption structure, including a base, a wheel frame, a wheel body, and an elastic shock absorption component. The base has a first abutment portion; the wheel frame is rotatably mounted on the base around a first axis and has a second abutment portion; the wheel body is rotatably mounted on the wheel frame; the elastic shock absorption component includes at least two elastic elements, which are disposed between the first and second abutment portions and can apply elastic force to the first and second abutment portions. The number of compressed elastic elements gradually increases as the distance between the first and second abutment portions decreases. This means that children of different ages can be supported by an appropriate number of elastic elements for shock absorption, avoiding the problem of insufficient shock absorption caused by excessive compression of a single spring in older children. Therefore, when the stroller shock absorption structure is installed in a children's stroller, it can provide good shock absorption for children of different ages and weights.

Description

Technical Field

[0001] This utility model relates to children's strollers, and in particular to a stroller shock absorption structure. Background Technology

[0002] Strollers typically have a shock-absorbing structure at the bottom. Existing shock-absorbing structures include a base, wheel frame, wheels, and compression springs. The base is mounted on the lower part of the stroller's support legs. The wheel frame rotatably mounts on the base, and the wheels rotatably mount on the wheel frame. The compression spring is installed between the wheel frame and the base, applying a cushioning force to suppress vibrations between the wheel frame and the base, thus achieving shock absorption. The older and heavier the child, the better the shock absorption of the stroller. For younger children, the shock absorption is relatively better, while for older children, the effect may be less noticeable. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a stroller shock-absorbing structure that, when installed in a children's stroller, provides good shock absorption for children of different ages and weights.

[0004] The stroller shock-absorbing structure according to an embodiment of the present invention includes a base, a wheel frame, a wheel body, and an elastic shock-absorbing assembly. The base has a first abutment portion; the wheel frame is rotatably disposed on the base about a first axis, and the wheel frame has a second abutment portion; the wheel body is rotatably disposed on the wheel frame; the elastic shock-absorbing assembly includes at least two elastic elements, each elastic element being disposed between the first abutment portion and the second abutment portion and capable of applying elastic force to the first abutment portion and the second abutment portion. The number of compressed elastic elements gradually increases as the distance between the first abutment portion and the second abutment portion decreases.

[0005] The stroller shock absorption structure according to the present invention has at least the following beneficial effects: by using a number of elastic elements to support the first abutment and the second abutment, as the child's age and weight increase, the distance between the first abutment and the second abutment further decreases, which allows more compression springs to participate in supporting the first abutment and the second abutment to support the child's weight. That is, children of different ages can be supported by a suitable number of elastic elements for shock absorption, avoiding the problem that older children may over-compress a single compression spring, resulting in insignificant shock absorption. Therefore, when the stroller shock absorption structure is installed in a children's stroller, it can have a good shock absorption effect for children of different ages and weights.

[0006] According to some embodiments of the present invention, the first abutting part is configured as a first abutting surface parallel to the first axis, the second abutting part is configured as a second abutting surface parallel to the first axis, the elastic element is configured as a compression spring, and each of the compression springs is arranged at intervals along the first axis direction, and each of the compression springs has a different free length.

[0007] According to some embodiments of the present invention, in the same elastic damping assembly, the free length of each compression spring arranged along the first axis has an increasing trend.

[0008] According to some embodiments of the present invention, in the same elastic damping assembly, the stiffness coefficient of each compression spring arranged along the first axis has an increasing trend.

[0009] According to some embodiments of the present invention, the stiffness coefficient of the compression spring with a larger free length is smaller than that of the compression spring with a smaller free length.

[0010] According to some embodiments of the present invention, the elastic element is configured as a compression spring, the base is provided with a first positioning part, the first positioning part cooperates with one end of the compression spring near the first abutting part and positions one end of the compression spring near the first abutting part, and the wheel frame is provided with a second positioning part, the second positioning part cooperates with one end of the compression spring near the second abutting part and positions one end of the compression spring near the second abutting part.

[0011] According to some embodiments of the present invention, the first positioning part includes at least two first positioning blocks, the first positioning blocks being inserted into the inner hole of the compression spring near the first abutting part, and the first positioning blocks corresponding to the compression spring one by one; the second positioning part includes at least two second positioning blocks, the second positioning blocks being inserted into the inner hole of the compression spring near the second abutting part, and the second positioning blocks corresponding to the compression spring one by one.

[0012] According to some embodiments of the present invention, the second positioning part further includes a positioning slot, the second positioning block is connected to the bottom wall of the positioning slot, and one end of the compression spring near the second abutment part is inserted into the positioning slot.

[0013] According to some embodiments of the present invention, two bases are provided and arranged at intervals along the first axis direction, and two wheel frames are provided and arranged at intervals along the first axis direction. Each wheel frame corresponds to one of the bases, and the two wheel frames are fixedly connected by a connecting rod. Each wheel frame is rotatably provided with a wheel body.

[0014] According to some embodiments of the present invention, two elastic damping components are provided and arranged at intervals along the first axis direction. Each elastic damping component includes two elastic elements, and the elastic damping components correspond one-to-one with the base.

[0015] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0016] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a three-dimensional schematic diagram of the shock-absorbing structure of the trolley according to an embodiment of the present utility model; Figure 2 This is an exploded view of the trolley shock absorption structure according to an embodiment of the present invention; Figure 3 This is an embodiment of the present utility model. Figure 2 A magnified view of a portion at point A; Figure 4 This is a side view of the shock-absorbing structure of the trolley according to an embodiment of the present invention.

[0017] Figure label: Base 100, first abutting part 110, first positioning block 120; Wheel frame 200, second abutment part 210, second positioning block 220, positioning slot 230; Wheel body 300; Elastic damping component 400, compression spring 410; Connecting rod 500; First axis 600. Detailed Implementation

[0018] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0019] In the description of this utility model, it should be understood that the orientation descriptions, such as up, down, etc., are based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0020] In the description of this utility model, "multiple" refers to two or more. The use of "first" and "second" is for distinguishing technical features only and should not be construed as indicating or implying relative importance, or implicitly indicating the number of technical features or their sequential relationship.

[0021] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0022] Reference Figures 1 to 4 The stroller shock-absorbing structure of this utility model includes a base 100, a wheel frame 200, a wheel body 300, and an elastic shock-absorbing assembly 400. The base 100 is provided with a first abutment portion 110; the wheel frame 200 is rotatably disposed on the base 100 about a first axis, and the wheel frame 200 is provided with a second abutment portion 210; the wheel body 300 is rotatably disposed on the wheel frame 200; the elastic shock-absorbing assembly 400 includes two or more elastic elements, which are disposed between the first abutment portion 110 and the second abutment portion 210 and can apply elastic force to the first abutment portion 110 and the second abutment portion 210. The number of compressed elastic elements gradually increases as the distance between the first abutment portion 110 and the second abutment portion 210 decreases.

[0023] The first abutment portion 110 and the second abutment portion 210 are supported by several elastic elements. As the child's age and weight increase, the distance between the first abutment portion 110 and the second abutment portion 210 further decreases, allowing more compression springs 410 to participate in supporting the first abutment portion 110 and the second abutment portion 210 to support the child's weight. This means that children of different ages can be supported by an appropriate number of elastic elements for shock absorption, avoiding the problem of older children over-compressing a single compression spring 410, resulting in insignificant shock absorption. This ensures that when the stroller shock absorption structure is installed in a children's stroller, it can provide good shock absorption for children of different ages and weights.

[0024] In the embodiments, reference is made to Figure 3 and Figure 4The first abutment portion 110 is configured as a first abutment surface parallel to the first axis, and the second abutment portion 210 is configured as a second abutment surface parallel to the first axis. The elastic element is configured as a compression spring 410, with each compression spring 410 spaced apart along the first axis direction, and each compression spring 410 having a different free length. Specifically, the free length refers to the length of the compression spring 410 in its natural, uncompressed state. By setting two or more compression springs 410 with different free lengths between the first abutment surface and the second abutment surface, when the distance between the first abutment portion 110 and the second abutment portion 210 decreases, the compression spring 410 with the larger free length is compressed first, while the compression spring 410 with the smaller free length remains uncompressed, which is suitable for shock absorption in younger children. When the distance between the first abutment portion 110 and the second abutment portion 210 further decreases, the compression spring 410 with the smaller free length is also compressed, allowing multiple compression springs 410 to participate in shock absorption simultaneously, which is suitable for older children. The compression springs 410 are arranged in a straight line, which helps to simplify the layout of the trolley's shock absorption structure and also simplifies the design of the shock absorption effect of the trolley's shock absorption structure.

[0025] Specifically, in this embodiment, the elastic damping component 400 has two compression springs 410. It is conceivable that in other embodiments, the elastic damping component 400 may also have three, four or more compression springs 410, and those skilled in the art can choose according to actual needs.

[0026] In the embodiments, reference is made to Figure 2 In the same elastic damping assembly 400, the free length of each compression spring 410 arranged along the first axis tends to increase, which helps to simplify the assembly process of the compression spring 410 and reduce the risk of misalignment of the compression spring 410 installation position.

[0027] It should be understood that if the direction of the first axis is left and right, in the same elastic damping component 400, the free length of each compression spring 410 gradually increases when viewed from left to right, that is, the free length of each compression spring 410 gradually decreases when viewed from right to left.

[0028] In the embodiments, reference is made to Figure 2 In the same elastic damping component 400, the stiffness coefficient of each compression spring 410 arranged along the first axis tends to increase, which helps to simplify the assembly process of the compression spring 410 and reduce the risk of misalignment of the compression spring 410 installation position.

[0029] In the embodiments, reference is made to Figure 2The spring 410 with a longer free length has a smaller stiffness coefficient than the spring 410 with a shorter free length. This means that younger infants are damped by the spring 410 with the longer free length, while older infants are damped by both springs 410 and 410 simultaneously. The spring 410 with the shorter free length has a larger stiffness coefficient, which provides better damping for older infants and improves the overall damping effect.

[0030] It is conceivable that in some other implementations, the stiffness coefficient of each compression spring 410 may be the same, in which case the number of compression springs 410 involved in shock absorption can be increased to accommodate older children.

[0031] It is conceivable that the first abutting part 110 or the second abutting part 210 could also be abutting surfaces with stepped distribution. In this case, the free length of the compression spring 410 should be reasonably set according to the distance between the corresponding two abutting surfaces. Optionally, the first abutting part 110 and the second abutting part 210 could also be abutting blocks, etc.

[0032] In the embodiments, reference is made to Figure 2 and Figure 3 The elastic element is configured as a compression spring 410. The base 100 is provided with a first positioning part, which cooperates with and positions the end of the compression spring 410 near the first abutment part 110. The wheel frame 200 is provided with a second positioning part, which cooperates with and positions the end of the compression spring 410 near the second abutment part 210.

[0033] During operation, the distance between the first abutment part 110 and the second abutment part 210 may change, potentially causing the compression spring 410 to misalign or loosen. Therefore, the first and second positioning parts are provided to provide basic positioning for both ends of the compression spring 410, reducing the risk of misalignment and loosening during operation and improving the stability of the trolley's shock absorption structure.

[0034] In the embodiments, reference is made to Figure 3 and Figure 4 The first positioning part includes two or more first positioning blocks 120, which are inserted into the inner hole of the compression spring 410 near the first abutment part 110. The first positioning blocks 120 correspond one-to-one with the compression spring 410. The second positioning part includes two or more second positioning blocks 220, which are inserted into the inner hole of the compression spring 410 near the second abutment part 210. The second positioning blocks 220 correspond one-to-one with the compression spring 410.

[0035] The first positioning block 120 and the second positioning block 220 are used to insert into the inner holes at both ends of the compression spring 410 to achieve positioning of both ends of the compression spring 410. The positioning method is simple, durable, and has good positioning accuracy. Specifically, in this embodiment, the elastic damping assembly 400 has two compression springs 410, that is, the first positioning part has two first positioning blocks 120, and the second positioning part has two second positioning blocks 220. It can be understood that when the elastic damping assembly 400 has three, four, or more compression springs 410, the first positioning part should also have three, four, or more first positioning blocks 120, and the second positioning part should also have three, four, or more second positioning blocks 220.

[0036] In the embodiments, reference is made to Figure 2 The second positioning part also includes a positioning slot 230, and a second positioning block 220 is connected to the bottom wall of the positioning slot 230. One end of the compression spring 410 near the second abutment 210 is inserted into the positioning slot 230. The second positioning part also positions the outer periphery of the compression spring 410 through the positioning slot 230, further improving the positioning effect of the second positioning part on the end of the compression spring 410 near the second abutment 210 and improving the stability of the positioning.

[0037] Specifically, the first positioning part is located above the second positioning part.

[0038] It is conceivable that in other embodiments, the first positioning part and the second positioning part may also be other structures. For example, the first positioning part includes a plurality of first positioning holes, one end of the compression spring 410 is inserted into the first positioning hole, and the compression spring 410 corresponds to the first positioning hole one by one; the second positioning part includes a plurality of second positioning holes, the other end of the compression spring 410 is inserted into the second positioning hole, and the compression spring 410 corresponds to the second positioning hole one by one.

[0039] In the embodiments, reference is made to Figure 1 Two bases 100 are provided and arranged at intervals along the first axis direction. Two wheel frames 200 are provided and arranged at intervals along the first axis direction. The wheel frames 200 correspond one-to-one with the bases 100. The two wheel frames 200 are fixedly connected by a connecting rod 500. Each wheel frame 200 is rotatably equipped with a wheel body 300.

[0040] Specifically, the stroller has a front stand and a rear stand, both of which are equipped with the aforementioned shock-absorbing structure. Therefore, the shock-absorbing structure described above is well-suited for four-wheeled strollers and has good compatibility.

[0041] In the embodiments, reference is made to Figure 1Two elastic shock-absorbing components 400 are provided and arranged at intervals along the first axis. Each elastic shock-absorbing component 400 includes two elastic elements, and each elastic shock-absorbing component 400 corresponds one-to-one with the base 100. This layout ensures that each base 100 and its corresponding wheel frame 200 have an independent elastic shock-absorbing component 400 for shock absorption. The shock absorption effect of each wheel frame 200 and wheel body 300 in the stroller's shock absorption structure is relatively uniform, which helps improve the stability of the stroller. Each elastic shock-absorbing component 400 includes two compression springs 410, with a simple and compact structure that can meet conventional shock absorption requirements.

[0042] Specifically, the elastic shock-absorbing component 400 includes two compression springs 410. Typically, when a child under six months old is riding in the stroller, the compression spring 410 with the larger free length participates in shock absorption. Typically, when a child over six months old is riding in the stroller, both the compression spring 410 with the smaller free length and the compression spring 410 with the larger free length participate in shock absorption.

[0043] Specifically, the rotation axis of the wheel body 300 is also set along the direction of the first axis.

[0044] Specifically, the central axis of the compression spring 410 is perpendicular to the direction of the first axis, which helps to improve the buffering and shock absorption effect of the compression spring 410.

[0045] It is conceivable that the aforementioned elastic element could also be, for example, an elastic rubber block or other elastic components.

[0046] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0047] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A shock-absorbing structure for a trolley, characterized in that, include: The base (100) is provided with a first abutment part (110); A wheel frame (200) is rotatably mounted on the base (100) about a first axis, and the wheel frame (200) is provided with a second abutment part (210); The wheel body (300) is rotatably mounted on the wheel frame (200); The elastic damping assembly (400) includes at least two elastic elements disposed between the first abutment portion (110) and the second abutment portion (210) and capable of applying elastic force to the first abutment portion (110) and the second abutment portion (210). The number of compressed elastic elements gradually increases as the distance between the first abutment portion (110) and the second abutment portion (210) decreases.

2. The stroller damping structure of claim 1, wherein: The first abutting part (110) is configured as a first abutting surface parallel to the first axis, the second abutting part (210) is configured as a second abutting surface parallel to the first axis, the elastic element is configured as a compression spring (410), each of the compression springs (410) is arranged at intervals along the first axis direction, and each of the compression springs (410) has a different free length.

3. The stroller damping structure of claim 2, wherein: In the same elastic damping assembly (400), the free length of each of the compression springs (410) arranged along the first axis tends to increase.

4. The stroller damping structure of claim 2, wherein: In the same elastic damping assembly (400), the stiffness coefficient of each of the compression springs (410) arranged along the first axis has an increasing trend.

5. The stroller damping structure of claim 4, wherein: The spring constant of the compression spring (410) with a larger free length is smaller than that of the compression spring (410) with a smaller free length.

6. The stroller damping structure of claim 1, wherein: The elastic element is configured as a compression spring (410). The base (100) is provided with a first positioning part, which cooperates with the end of the compression spring (410) near the first abutment part (110) and positions the end of the compression spring (410) near the first abutment part (110). The wheel frame (200) is provided with a second positioning part, which cooperates with the end of the compression spring (410) near the second abutment part (210) and positions the end of the compression spring (410) near the second abutment part (210).

7. The stroller damping structure of claim 6, wherein: The first positioning part includes at least two first positioning blocks (120), which are inserted into the inner hole of the compression spring (410) near the first abutment part (110). The first positioning blocks (120) correspond one-to-one with the compression spring (410). The second positioning part includes at least two second positioning blocks (220), which are inserted into the inner hole of the compression spring (410) near the second abutment part (210). The second positioning blocks (220) correspond one-to-one with the compression spring (410).

8. The stroller damping structure of claim 7, wherein: The second positioning part further includes a positioning slot (230), the second positioning plug (220) is connected to the bottom wall of the positioning slot (230), and the end of the compression spring (410) near the second abutment part (210) is inserted into the positioning slot (230).

9. The stroller damping structure of claim 1, wherein: Two bases (100) are provided and arranged at intervals along the first axis direction. Two wheel frames (200) are provided and arranged at intervals along the first axis direction. Each wheel frame (200) corresponds to one of the bases (100). The two wheel frames (200) are fixedly connected by a connecting rod (500). Each wheel frame (200) is rotatably provided with a wheel body (300).

10. The trolley shock absorption structure according to claim 9, characterized in that: Two elastic damping components (400) are provided and arranged at intervals along the first axis. Each elastic damping component (400) includes two elastic elements, and each elastic damping component (400) corresponds to the base (100).

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