Frame and bicycle

Abstract

To provide a frame and a bicycle in which a seat stay has rigidity and strength.SOLUTION: The current invention relates to a frame 100 and a bicycle. A seat stay 50 of the frame 100 includes a seat stay head 51 and a seat stay support 52. The seat stay support 52 includes a transition section 52a and an arc connection section 52b provided in adjacency in a back and forth direction of the frame 100. The transition section 52a is provided in adjacency to the seat stay head 51. Length of the seat stay support 52 occupies 25% or more of the total length of the seat stay 50, a minimum dimension L1 in a vertical direction of the arc connection section 52b is 1.5 multiple or more of the minimum dimension L1 in the vertical direction of the transition section 52a. The frame 100 and the seat stay 50 of the bicycle have great rigidity and strength, are strong in pressure resistance performance, and contribute to stability of a bicycle structure.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] This application relates to the field of bicycles, and more particularly to frames and bicycles. [Background technology]

[0002] Bicycles, also known as motorbikes or bikes, are typically used as two-wheeled land vehicles. Bicycles are not only an environmentally friendly means of transportation for travel and outings, but also fitness equipment for cycling training and leisure activities, making them an important outing and fitness tool in people's daily lives.

[0003] A bicycle typically includes seat stays that support the rear wheel. During actual use, the seat stays are typically subjected to vertical forces. Currently, seat stays typically use a cylindrical structure, but these structures lack rigidity and strength, making them prone to being crushed and deformed when subjected to force, which adversely affects the structural stability of the bicycle. Summary of the Invention [Problem to be solved by the invention]

[0004] Based on this, it is necessary to provide a frame and bicycle that addresses the problem of seat stays lacking in rigidity and strength and being prone to crushing and deformation. [Means for solving the problem]

[0005] The frame includes a seat stay, the seat stay including a seat stay head and a seat stay support, the seat stay support including a transition section and an arc-shaped connection section provided adjacent to each other in the front-rear direction of the frame, the transition section being provided adjacent to the seat stay head, The minimum longitudinal dimension of the arc-shaped connecting section is 1.5 times or more the minimum longitudinal dimension of the transition section, and the length of the seat stay support is 25% or more of the total length of the seat stay; The vertical dimension is the dimension in the vertical direction of any cross section perpendicular to the extension direction of the seat stay, and the vertical direction of the cross section is perpendicular to the orthogonal projection of the left-right direction of the frame onto the cross section.

[0006] In some embodiments, the longitudinal dimension of the arcuate connecting section gradually increases from one end near the transition section to the other end.

[0007] In some embodiments, in any cross-section of the arc-shaped connection section, the lateral dimension of the arc-shaped connection section is smaller than its longitudinal dimension, and the lateral dimension refers to the dimension in the lateral direction of the corresponding cross-section, which lateral direction of the cross-section coincides with the orthogonal projection of the left-right direction of the frame onto the cross-section.

[0008] In some embodiments, the longitudinal dimension of the transition section gradually increases from one end closer to the seat stay head to one end closer to the arcuate connecting section.

[0009] In some embodiments, the lateral dimension of the seat stay support tapers from one end near the seat stay head to the other end.

[0010] In some embodiments, the longitudinal dimension of the seat stay head is less than its lateral dimension.

[0011] In some embodiments, the frame includes a top tube, a seat tube, a bottom bracket shell, chainstays, and a rear axle mounting portion, wherein the seat tube is connected to the top tube and the seatstay head, the bottom bracket shell is connected to the seat tube and the chainstays, the rear axle mounting portion is connected to the arcuate connecting section and the chainstays, and the arcuate connecting section is raised away from the chainstays.

[0012] In some embodiments, the chainstay includes a chainstay head and two chainstay supports, the chainstay head is connected between the two chainstay supports and the bottom bracket shell, each chainstay support is independently connected to the arc-shaped connection section of the seat stay support via one of the rear wheel axle mounting portions, the vertical dimension of each chainstay support is greater than its lateral dimension, and both the vertical dimension and the lateral dimension gradually decrease from one end close to the bottom bracket shell to the other end.

[0013] In some embodiments, at least one of the chainstay supports is provided with a disc brake mounting portion, the disc brake mounting portion being located adjacent to the rear axle mounting portion; At least one of the chainstay supports has an inner wall surface facing the other chainstay support that has a retraction recess, and the retraction recess is located at one end of the chainstay support that is closer to the chainstay head.

[0014] In some embodiments, the top tube includes a first tube, a folder, and a second tube, the second tube connected to the seat tube, the first tube hingedly connected to the second tube via the folder, and the folder allowing the first tube to be switched between an unfolded state relative to the second tube and a folded state relative to the second tube; The frame further includes a cable, one end of the cable being connected to the bottom bracket shell and the other end being connected to the first tube.

[0015] The bicycle includes a frame as in the above embodiment. [Effects of the Invention]

[0016] In the above frame and bicycle, since the arc-shaped connecting section is close to the rear wheel axle mounting portion, it is subjected to greater vertical pressure, and the vertical dimension of the arc-shaped connecting section is large. At this time, the arc-shaped connecting section's ability to resist vertical deformation is greater than that of the transition section. That is, the arc-shaped connecting section has greater rigidity and strength, which contributes to improving the rigidity and strength of the seat stays, further improving the seat stays' ability to resist vertical deformation, and contributing to the stability of the bicycle structure.

[0017] In addition, the arc-shaped connection section is configured in an arc shape, which allows for a larger accommodation space to be formed between the arc-shaped connection section and the chainstay, making it easy to install structures such as disc brakes. Furthermore, the arc-shaped connection section protrudes upward, which increases resistance to vertical bending and further improves the bending resistance of the seat stay, i.e., further improves the rigidity and strength of the seat stay.

[0018] Furthermore, if the length ratio of the seat stay support is 25% or more, it can effectively save the volume of the seat stay, reduce the wear material of the seat stay, and reduce the cost of the frame.

[0019] Various other benefits and advantages will become apparent to those skilled in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the present application. Also, like reference numerals are used throughout the drawings to represent like elements. [Brief explanation of the drawings]

[0020] [Figure 1] FIG. 1 is a perspective view of a frame according to some embodiments of the present application. [Figure 2] FIG. 2 is a front view of the frame shown in FIG. [Figure 3] FIG. 2 is a plan view of the frame shown in FIG. [Figure 4] FIG. 2 is a right side view of the frame shown in FIG. [Figure 5] FIG. 10 is a perspective view of a frame according to another embodiment of the present application. DETAILED DESCRIPTION OF THE INVENTION

[0021] In order to make the above-mentioned objects, features, and advantages of the present application clearer and easier to understand, specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. In the following description, many specific details are set forth to provide a thorough understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present application, so the present application is not limited by the specific examples disclosed below.

[0022] In the description of this application, orientations or positional relationships indicated by terms such as "center," "longitudinal direction," "lateral direction," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial direction," "radial direction," "circumferential direction," etc. are orientations or positional relationships shown in the drawings, and are used only to facilitate or simplify the description of this application, and it should be understood that these do not represent or imply that the devices or parts shown necessarily have a specific orientation or a specific oriented structure and operation, and therefore should not be construed as limiting this application.

[0023] Additionally, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply a relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature qualified as "first" or "second" may explicitly or implicitly include at least one of the feature. In the description of this application, unless explicitly and specifically limited, "plurality" means at least two, e.g., two, three, etc.

[0024] In this application, unless otherwise clearly specified or limited, the terms "attached," "coupled," "connected," "fixed," etc. should be understood in a broad sense, and may refer to, for example, a fixed connection, a detachable connection, an integral connection, a mechanical connection, an electrical connection, a direct connection, an indirect connection via an intermediate substrate, an internal communication between two elements, or an interactive relationship between two elements. Those skilled in the art can understand the specific meanings of the above terms in this application according to specific circumstances.

[0025] In this application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include direct contact between the first feature and the second feature, or indirect contact between the first feature and the second feature via an intermediate substrate. Furthermore, a first feature being "above," "above," and "on the upper surface" of a second feature may include the first feature being directly above or diagonally above the second feature, or may simply indicate that the horizontal height of the first feature is higher than that of the second feature. A first feature being "below," "below," and "on the lower surface" of a second feature may mean that the first feature is directly below or diagonally below the second feature, or may simply indicate that the horizontal height of the first feature is lower than that of the second feature.

[0026] It should be noted that when an element is "fixed" or "mounted" to another element, it may be directly connected to the other element, or there may be intervening elements present. When an element is considered to be "connected" to another element, it may be directly connected to the other element, but there may also be intervening elements present. The terms "vertical," "horizontal," "up," "down," "left," "right," and similar terms used herein are for illustrative purposes only and do not represent the only embodiment.

[0027] The embodiments of the present application provide a seat stay that addresses the problem of low rigidity and strength of currently commonly used seat stays. The seat stay is applied to a frame.

[0028] The left-right direction, front-rear direction, and up-down direction of the frame referred to in the embodiments of this application refer to directions defined with respect to the rider's viewpoint when the bicycle is in use. The left-right direction of the frame is the left-right direction of the rider, the front-rear direction of the frame is the front-rear direction of the rider, and the up-down direction of the frame is the up-down direction of the rider.

[0029] Furthermore, the longitudinal and lateral dimensions of the seat stays referred to in the embodiments of the present application refer to a cross section perpendicular to the extension direction of the seat stays, where the orthogonal projection of the left and right direction of the frame onto the cross section is the lateral direction of the cross section, and the direction perpendicular to the lateral direction is the longitudinal direction of the cross section. The longitudinal dimension of the cross section is the dimension in the longitudinal direction of the cross section, and the lateral dimension of the cross section is the dimension in the lateral direction of the cross section.

[0030] According to some embodiments of the present application, as shown in FIGS. 1 to 4 , a frame 100 in the embodiments of the present application includes a seat stay 50. The seat stay 50 includes a seat stay head 51 and a seat stay support 52. The seat stay support 52 includes a transition section 52a and an arc-shaped connecting section 52b provided adjacent to each other in the fore-and-aft direction of the frame 100, and the transition section 52a is provided adjacent to the seat stay head 51. The minimum vertical dimension L1 of the arc-shaped connecting section 52b is 1.5 times or more the minimum vertical dimension L1 of the transition section 52a. The length of the seat stay support 52 accounts for 25% or more of the total length of the seat stay 50. The vertical dimension L1 is the dimension in the vertical direction of any cross section perpendicular to the extension direction of the seat stay 50, and the vertical direction of the cross section is perpendicular to the orthogonal projection of the left-right direction of the frame 100 onto the cross section.

[0031] Generally, the frame 100 includes a top tube 10, a seat tube 20, a bottom bracket shell 30, chainstays 40, a rear axle mounting portion 60, and seat stays 50. The seat tube 20 is connected to the top tube 10 and the seat stays 50, the bottom bracket shell 30 is connected to the seat tube 20 and the chainstays 40, and the rear axle mounting portion 60 is connected to the seat stays 50 and the chainstays 40.

[0032] The top tube 10, seat tube 20, bottom bracket shell 30, seat stays 50, chainstays 40, and rear wheel axle mounting portion 60 are integrally connected or welded together. The top tube 10 is connected to the front of the seat tube 20 and is configured to connect a head pipe member 80 for attaching a stem. The seat tube 20 typically extends vertically in a straight line or diagonally. Its upper end is typically used to attach a bicycle seat, and its lower end is connected to the bottom bracket shell 30. The bottom bracket shell 30 is a structure for attaching pedals and other components and is typically hollow. The bottom bracket shell 30 is typically located below the top tube 10, and the chainstays 40 are connected to the seat tube 20 via the bottom bracket shell 30, while the seat stays 50 are directly connected to the seat tube 20. The bottom bracket shell 30 may be connected to the top tube 10, but is not limited to this. The rear wheel axle mounting portion 60 is for mounting a rear wheel axle, and the seat stays 50 and the chain stays 40 are connected via the rear wheel axle mounting portion 60. The specific structure of the rear wheel axle mounting portion 60 is not limited here and can be generally installed by those skilled in the art. As can be easily understood, the seat stays 50 are disposed above the chain stays 40.

[0033] Specifically, the seat stay head 51 is connected to the seat tube 20, and the arcuate connecting section 52b is connected to the rear wheel axle mounting portion 60, and the arcuate connecting section 52b protrudes away from the chain stay 40. The seat stay head 51, the transition section 52a, and the arcuate connecting section 52b are typically, but not limited to, integrally molded.

[0034] Typically, the seat stay 50 includes two seat stay supports 52, which are spaced apart in the left-right direction of the frame 100 and connected to the seat stay head 51. Each seat stay support 52 may be independently connected to one rear wheel axle mounting portion 60.

[0035] The transition section 52a generally extends substantially linearly. The arcuate connecting section 52b extends arcuately and is raised away from the chainstay 40, i.e., raised upward.

[0036] The longitudinal dimension L1 of the transition section 52a is the dimension in the longitudinal direction of each cross section of the transition section 52a. Because the transition section 52a typically extends linearly, the longitudinal directions of the cross sections of the transition section 52a are parallel to each other. The longitudinal dimension L1 of the arc-shaped connection section 52b is the dimension in the longitudinal direction of its cross section. Because the arc-shaped connection section 52b extends in an arc shape, the longitudinal directions of the cross sections of the arc-shaped connection section 52b are not parallel to each other.

[0037] The minimum longitudinal dimension L1 of the transition section 52a is the smallest of the longitudinal dimensions L1 of all its cross sections. The minimum longitudinal dimension L1 of the arc-shaped connection section 52b is the smallest of the longitudinal dimensions L1 of all its cross sections. In the embodiment of the present application, the minimum longitudinal dimension L1 of the arc-shaped connection section 52b is 1.5 times or more the minimum longitudinal dimension L1 of the transition section 52a. That is, the minimum longitudinal dimension L1 of the arc-shaped connection section 52b is greater than 1.5 times the minimum longitudinal dimension L1 of the transition section 52a, or the portion where the minimum longitudinal dimension L1 of the arc-shaped connection section 52b exceeds the minimum longitudinal dimension L1 of the transition section 52a is 50% or more of the minimum longitudinal dimension L1 of the transition section 52a. Specifically, the minimum longitudinal dimension L1 of the arcuate connecting section 52b is greater than 1.5 times, 1.6 times, 1.8 times, 2 times, 2.5 times, etc. the minimum longitudinal dimension L1 of the transition section 52a.

[0038] The longitudinal dimension L1 affects the ability of the arc-shaped connecting section 52b and the transition section 52a to resist vertical deformation, with the larger the longitudinal dimension L1, the stronger the ability to resist vertical deformation. Because the arc-shaped connecting section 52b is closer to the rear axle mounting portion 60, it is subjected to greater vertical pressure. At this time, the arc-shaped connecting section 52b's ability to resist vertical deformation is greater than that of the transition section 52a. This means that the arc-shaped connecting section 52b has greater rigidity and strength, which helps improve the rigidity and strength of the seat stay 50, further improving the seat stay 50's ability to resist vertical deformation and contributing to the stability of the bicycle structure.

[0039] In addition, the arc-shaped connection section 52b is formed in an arc shape, which allows for a larger accommodation space to be formed between the arc-shaped connection section 52b and the chain stay 40, making it easy to install structures such as disc brakes. Furthermore, the arc-shaped connection section protrudes upward, which increases its resistance to vertical bending and further improves the bending resistance of the seat stay 50, i.e., further improves the rigidity and strength of the seat stay 50.

[0040] The total length of the seat stay 50 is the length of a line connecting the geometric centers of each cross section of the seat stay 50, and includes the length of the seat stay head 51 and the length of the seat stay support 52. The length of the seat stay support 52 includes the length of the transition section 52a and the length of the arc-shaped connecting section 52b. The length of the seat stay support 52 is 25% or more of the total length of the seat stay 50, i.e., the length of the seat stay support 52 is greater than 25% of the total length of the seat stay 50. Specifically, the length of the seat stay support 52 is 30%, 40%, 50%, 60%, 70%, 80%, or 90% of the total length of the seat stay 50, etc.

[0041] When the length ratio of the seat stay support 52 is within the above range, the volume of the seat stay 50 can be effectively saved, the wear material of the seat stay 50 can be reduced, and the cost of the frame 100 can be reduced.

[0042] In some embodiments, the longitudinal dimension L1 of the arcuate connecting section 52b gradually increases from one end near the transition section 52a to the other end.

[0043] That is, the longitudinal dimension L1 of the arc-shaped connecting section 52b gradually increases from front to rear, with the minimum longitudinal dimension L1 of the arc-shaped connecting section 52b being located at the boundary with the transition section 52a, and the maximum longitudinal dimension L1 of the arc-shaped connecting section 52b being located at the boundary with the rear wheel axle mounting portion 60.

[0044] At this time, the vertical dimension L1 of the arc-shaped connecting section 52b increases continuously, and the closer to the rear wheel axle mounting portion 60, the greater the rigidity and strength of the arc-shaped connecting section 52b, which contributes to improving the ability of the seat stay 50 to resist deformation and contributes to saving material.

[0045] In some embodiments, in any cross-section of the arc-shaped connecting section 52b, the lateral dimension L2 of the arc-shaped connecting section 52b is smaller than its longitudinal dimension L1. The lateral dimension L2 refers to the dimension in the lateral direction of the corresponding cross-section, which coincides with the orthogonal projection of the left-right direction of the frame 100 onto the cross-section.

[0046] That is, the lateral dimension L2 of the arc-shaped connecting section 52b is the dimension in the lateral direction of the corresponding cross section. The lateral direction and the longitudinal direction of the cross section are perpendicular to each other.

[0047] Since the horizontal dimension L2 of the arc-shaped connecting section 52b in each cross section is smaller than its vertical dimension L1, the vertical dimension L1 of the arc-shaped connecting section 52b is larger than its horizontal dimension L2, and the arc-shaped connecting section 52b is arranged in an approximately flat shape in the left-right direction of the frame 100, the ability of the arc-shaped connecting section 52b to resist vertical deformation is improved and consumable materials can be saved.

[0048] In some embodiments, as shown in FIG. 2, the longitudinal dimension L1 of the transition section 52a gradually increases from one end closer to the seat stay head 51 to one end closer to the arcuate connecting section 52b.

[0049] That is, the longitudinal dimension L1 of the transition section 52a increases toward the arc-shaped connecting section 52b, and the transition section 52a has a structure in which one end is larger and the other end is smaller, with the longitudinal dimension L1 being larger at the end closest to the rear wheel axle mounting portion 60. In this way, the end of the transition section 52a has a strong ability to resist vertical deformation, contributing to improving the rigidity and strength of the seat stay 50. In addition, the tip of the transition section 52a is narrow, which contributes to saving consumable materials.

[0050] In some embodiments, as shown in Figure 3, the lateral dimension L2 of the seat stay support 52 gradually decreases from one end close to the seat stay head 51 to the other end. In this case, the lateral dimension L2 of the seat stay support 52 gradually becomes thinner from front to rear, thus contributing to saving consumable materials, reducing the space occupied by the seat stays 50, and providing more mounting space for disc brakes, wheels, etc.

[0051] In some embodiments, the longitudinal dimension L1 of the seat stay head 51 is smaller than the lateral dimension L2 thereof. In this manner, the seat stay head 51 has a generally flat structure in the vertical direction, which contributes to saving consumable materials for the seat stay head 51.

[0052] 1 to 4, the frame 100 of the present application further includes a top tube 10, a seat tube 20, a bottom bracket shell 30, a chainstay 40, a rear axle mounting portion 60, and the seat stay 50 described in any of the above embodiments. The seat tube 20 is connected to the top tube 10 and a seat stay head 51, the bottom bracket shell 30 is connected to the seat tube 20 and the chainstay 40, and the rear axle mounting portion 60 is connected to an arc-shaped connecting section 52b and the chainstay 40, and the arc-shaped connecting section 52b protrudes from behind the chainstay 40. The frame 100 has all the beneficial effects of the above embodiments.

[0053] In some embodiments, as shown in Figures 1 and 2, the chainstay 40 includes a chainstay head 41 and two chainstay supports 42, the chainstay head 41 is connected between the two chainstay supports 42 and the bottom bracket shell 30, each chainstay support 42 is independently connected to the arc-shaped connection section 52b of one seat stay support 52 via one rear wheel axle mounting portion 60, the vertical dimension L1 of each chainstay support 42 is greater than its horizontal dimension L2, and both the vertical dimension L1 and the horizontal dimension L2 gradually decrease from one end close to the bottom bracket shell 30 to the other end.

[0054] The chainstay head 41 serves to connect the chainstay support 42 and the bottom bracket shell 30. The chainstay support 42 is connected to the arc-shaped connection section 52b of the seat stay 50 via the rear wheel axle mounting portion 60. As described above, the longitudinal dimension L1 of the chainstay support 42 is the longitudinal dimension of a cross section perpendicular to its extension direction, and the lateral dimension L2 of the chainstay support 42 is the lateral dimension of that cross section.

[0055] Because the vertical dimension L1 of the chainstay support 42 is greater than its horizontal dimension L2 and the chainstay support 42 has a horizontally flat structure, the space that the chainstays 40 occupy in the horizontal direction of the frame 100 is small, providing more mounting space for the rear wheel, etc. In addition, both the vertical dimension L1 and horizontal dimension L2 of the chainstay support 42 gradually decrease from front to rear, contributing to savings in consumable materials.

[0056] Preferably, the two seat stay supports 52 are spaced apart in the left-right direction of the frame 100, and the two chain stay supports 42 are spaced apart in the left-right direction of the frame 100, with the spacing distance between the two seat stay supports 52 and the spacing distance between the two chain stay supports 42 both gradually increasing from one end close to the seat stay head 51 to one end close to the rear wheel axle mounting portion 60, making it easier to mount structures such as a rear wheel and a disc brake.

[0057] 1 and 2, at least one chainstay support 42 is provided with a disc brake mounting portion 42a, and the disc brake mounting portion 42a is provided adjacent to the rear axle mounting portion 60. Specifically, the disc brake mounting portion 42a includes a plurality of mounting holes, and the disc brake may be mounted in the mounting holes via fasteners. The disc brake mounting portion 42a may be provided on one chainstay support 42, or on two chainstay supports 42. The position of the disc brake mounting portion 42a adjacent to the rear axle mounting portion 60 is disposed substantially opposite the arc-shaped connection section 52b, thus providing a large mounting space for the disc brake mounting portion 42a.

[0058] In some embodiments, as shown in FIG. 4, an evacuation recess 42b is provided on the inner wall surface of at least one chainstay support 42 facing the other chainstay support 42, and the evacuation recess 42b is positioned at one end of the chainstay support 42 close to the chainstay head 41.

[0059] Normally, the distance between the ends of the two chainstay supports 42 closest to the chainstay head 41 is small, and in this case, by providing a recess 42b in the inner wall surface of the front end of the chainstay support 42, the distance between the front ends of the two chainstay supports 42 is increased, making it easier to attach the rear wheel.

[0060] In some embodiments, as shown in Figures 1, 2 and 3, the top tube 10 includes a first tube 11, a folder 13 and a second tube 12, the second tube 12 is connected to the seat tube 20, the first tube 11 is hingedly connected to the second tube 12 via the folder 13, and the folder 13 allows the first tube 11 to be switched between an unfolded state relative to the second tube 12 and a folded state relative to the second tube 12.

[0061] The first tube 11 is connected to the head pipe member 80. The folder 13 allows the first tube 11 to rotate relative to the second tube 12 so that the first tube 11 can be switched between an unfolded state and a folded state relative to the second tube 12. The specific structure of the folder 13 is not limited here and can be generally installed by a person skilled in the art.

[0062] Specifically, when the first tube 11 is unfolded, the first tube 11 and the second tube 12 are aligned in the same straight line, thereby placing the bicycle in the unfolded state. On the other hand, when the first tube 11 is folded, the first tube 11 and the second tube 12 are aligned side by side, thereby placing the bicycle in the folded state.

[0063] In this way, the frame 100 can be applied to a folding bicycle.

[0064] 1 and 2 , the frame 100 further includes a cable 70, one end of which is connected to the bottom bracket shell 30 and the other end of which is connected to the first tube 11. The cable 70 is typically, but not limited to, a steel rope. The cable 70 is connected between the bottom bracket shell 30 and the first tube 11, and when the first tube 11 is in an unfolded state, the cable 70, the seat tube 20, and the top tube 10 are connected to form a substantially triangle, which improves the stability of the top tube 10 and contributes to improving the strength of the frame 100.

[0065] Preferably, the entire frame 100 is made of a metal material or a carbon fiber material.

[0066] Of course, in another embodiment, as shown in FIG. 5, the frame 100 may have a non-foldable structure, and further, a reinforcing tube 90 may be used instead of the cable 70, and the reinforcing tube 90 may be added to connect the bottom bracket shell 30 and the top tube 11, thereby improving the strength of the frame 100.

[0067] In one embodiment of the present application, as shown in FIGS. 1 to 4 , the frame 100 includes the head pipe member 80, a top tube 10, a seat tube 20, a bottom bracket shell 30, chainstays 40, seat stays 50, a rear wheel axle mounting portion 60, and a cable 70. The top tube 10 includes the first tube 11, a folder 13, and a second tube 12. The bottom bracket shell 30 is connected to the seat tube 20, the chainstays 40, and the second tube 12. The cable 70 is connected to the bottom bracket shell 30 and the first tube 11. The seat stay 50 includes a seat stay head 51 and two seat stay supports 52, and the seat stay head 51 is directly connected to the seat tube 20. Each seat stay support 52 includes a transition section 52 a and an arc-shaped connection section 52 b, and each seat stay support 52 is connected to the seat stay head 51 via its transition section 52 a. The longitudinal dimension L1 of the seat stay support 52 gradually increases from front to rear, and the lateral dimension L2 of the seat stay support 52 gradually decreases from front to rear. The lateral dimension L2 of each cross section of the arc-shaped connection section 52b is smaller than the longitudinal dimension L1.

[0068] Moreover, the embodiment of the present application further provides a bicycle, which includes the frame 100, and the frame 100 is mainly used as a rear frame of the bicycle, and has all the beneficial effects of the frame 100.

[0069] The frame 100 may further include a rear wheel, a front frame, a front wheel, a stem, a seat, and pedals, where the rear wheel is attached to the rear wheel mounting portion, the front wheel is attached to the front frame, the front frame is attached to the head pipe member 80 via the stem, the seat is attached to the seat tube 20, and the pedals are attached to the bottom bracket shell 30.

[0070] The technical features of the above-described embodiments can be combined in any manner, and for the sake of brevity, not all possible combinations of the technical features in the above-described embodiments are described, but as long as there is no contradiction in the combination of these technical features, they should be considered within the scope described in this specification.

[0071] The above examples only describe some embodiments of the present application, and although the descriptions are specific and detailed, they should not be construed as limiting the scope of the patent of the present application. Those skilled in the art may make various modifications and improvements to the present application without departing from the spirit of the present application, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of the patent of the present application should be determined based on the scope of the accompanying claims. [Explanation of symbols]

[0072] 100 frames 10 Top tube 11 1st Tube 12 Second Tube 13 Folders 20 seat tube 30 bottom bracket shell 40 chainstay 41 Chainstay head 42 Chainstay support 42a Disc brake mounting part 42b Retractable recess 50 seat stay 51 Seat stay head 52 Seat stay support 52a Transition Section 52b Arc-shaped connecting section L1 Vertical dimension L2 horizontal dimension 60 Rear wheel axle mounting part 70 Cable 80 Head pipe material 90 Reinforced pipe

Claims

1. A frame (100), the frame (100) including seat stays (50), the seat stays (50) including seat stay heads (51) and seat stay supports (52), the seat stay supports (52) including a transition section (52a) and an arc-shaped connection section (52b) provided adjacent to each other in the fore-and-aft direction of the frame (100), the transition section (52a) being provided adjacent to the seat stay head (51), the minimum longitudinal dimension (L1) of the arc-shaped connecting section (52b) is at least 1.5 times the minimum longitudinal dimension (L1) of the transition section (52a), and the length of the seat stay support (52) accounts for at least 25% of the total length of the seat stay (50); The vertical dimension (L1) is the dimension in the vertical direction of any cross section perpendicular to the extension direction of the seat stay (50), and the vertical direction of the cross section is perpendicular to the orthogonal projection of the left-right direction of the frame (100) onto the cross section.

2. 2. The frame (100) according to claim 1, wherein the longitudinal dimension (L1) of the arcuate connecting section (52b) gradually increases from one end close to the transition section (52a) to the other end.

3. In any cross section of the arc-shaped connecting section (52b), the transverse dimension (L2) of the arc-shaped connecting section (52b) is smaller than its longitudinal dimension (L1); The frame (100) of claim 2, characterized in that the lateral dimension (L2) refers to the dimension in the lateral direction of the corresponding transverse cross section, which lateral direction of the transverse cross section coincides with the orthogonal projection of the left-right direction of the frame (100) onto the transverse cross section.

4. 2. The frame (100) according to claim 1, wherein the longitudinal dimension (L1) of the transition section (52a) gradually increases from one end closer to the seat stay head (51) to one end closer to the arcuate connecting section (52b).

5. The lateral dimension (L2) of the seat stay support (52) gradually decreases from one end close to the seat stay head (51) to the other end, and / or 2. A frame (100) according to claim 1, wherein the longitudinal dimension L1 of the seat stay head (51) is smaller than its lateral dimension L2.

6. The frame (100) further includes a top tube (10), a seat tube (20), a bottom bracket shell (30), a chainstay (40), and a rear axle mounting portion (60); 2. The frame (100) of claim 1, wherein the seat tube (20) is connected to the top tube (10) and the seat stay head (51), the bottom bracket shell (30) is connected to the seat tube (20) and the chain stay (40), and the rear wheel axle mounting portion (60) is connected to the arc-shaped connection section (52b) and the chain stay (40), and the arc-shaped connection section (52b) protrudes away from the chain stay (40).

7. 7. The frame (100) according to claim 6, wherein the chainstay (40) includes a chainstay head (41) and two chainstay supports (42), the chainstay head (41) is connected between the two chainstay supports (42) and the bottom bracket shell (30), each of the chainstay supports (42) is independently connected to the arc-shaped connection section (52b) of the seat stay support (52) via one of the rear wheel axle mounting portions (60), and the longitudinal dimension (L1) of each chainstay support (42) is greater than its lateral dimension (L2), and both the longitudinal dimension (L1) and the lateral dimension (L2) gradually decrease from one end close to the bottom bracket shell (30) to the other end.

8. At least one of the chainstay supports (42) is provided with a disc brake mounting portion (42a), and the disc brake mounting portion (42a) is provided adjacent to the rear wheel axle mounting portion (60); 8. A frame (100) according to claim 7, characterized in that an inner wall surface of at least one of the chainstay supports (42) facing the other chainstay support (42) is provided with a recess (42b), and the recess (42b) is positioned at one end of the chainstay support (42) close to the chainstay head (41).

9. The top tube (10) includes a first tube (11), a folder (13), and a second tube (12), the second tube (12) is connected to the seat tube (20), the first tube (11) is hingedly connected to the second tube (12) via the folder (13), and the folder (13) allows the first tube (11) to be switched between an unfolded state relative to the second tube (12) and a folded state relative to the second tube (12); The frame (100) of claim 6, further comprising a cable (70), one end of which is connected to the bottom bracket shell (30) and the other end of which is connected to the first tube (11).

10. A bicycle, characterized in that it includes a frame (100) according to any one of claims 1 to 9.

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