TW201827259A - Coupling unit - Google Patents

Abstract

The present invention relates to a fastening unit for fastening a tire to a rim. The fastening unit comprises an upper surface, a lower surface, and a side surface part. The maximum length of the fastening unit is longer than a distance between both hooks of the rim. The side surface part comprises a sliding area in which the fastening unit can slide on the hooks of the rim such that the fastening unit is easily inserted into the rim in the process of insertion of the fastening unit into the rim. In a state in which the fastening unit has been inserted into the rim, at least a part of the upper surface is in contact with the bottom surfaces of the hooks to prevent the fastening unit from escaping from the rim.

Description

Coupling unit

The present invention relates to a coupling unit for inserting a tire into a tire for a bicycle rim.

Recently, as the awareness of the green environment and low-carbon sports has increased, urban and mountain bikes have continued to spread. Generally, the possibility of a flat tire using an air tire having an inner tube is high, and over time, air injected into the inner tube leaks and it is inconvenient to reinject the air.

To solve the problem, recently, air tires have been replaced, and the demand for solid tires has increased. Solid tires are tires made of rubber and do not use air. Compared with air tires, they have the advantage of being able to be used for a long time without the possibility of flat tires. Solid tires can be fixed by means of (i.e., rims) The fixing portion, the coupling unit, etc.) are fixed (or mounted, fixed) on the rim.

However, when a solid tire is mounted on the rim, when the impact applied to the tire is deviated to one of the left and right directions, the tire's fixing member is detached from the rim, which may cause the tire to separate from the rim and cause an accident. problem. Therefore, it is required to develop a technology capable of solving the problems.

The background art of the present invention is disclosed in Korean Published Patent No. 0943331. The Korean Patent Gazette discloses a structure in which a tire is mounted on a rim by a fixing member, but it has no intentional shape or physical property conditions for the fixing member to prevent disassembly of the rim and the tire.

(1) Technical problems to be solved

The present invention has been made to solve a conventional technical problem, and an object thereof is to provide a coupling unit capable of preventing the tire from being detached from the rim even if an external impact or the like is applied to the tire mounted on the bicycle rim.

The present invention is made to solve a conventional technical problem, and an object thereof is to provide a coupling unit capable of preventing an accident caused by separation of a tire from a rim and coupling the tire to the rim.

The technical problems to be achieved by the embodiments of the present invention are not limited to the technical problems described above, and other technical problems may also exist.

(Two) technical solutions

In order to achieve the technical means of the above technical problem, the coupling unit of the first aspect of the present invention includes an upper surface, a lower surface and a side portion. The maximum length L of the coupling unit is longer than the length L _R between the two hooks of the rim. The side portion includes a sliding area, so that when the rim is inserted into the coupling unit, the hook of the rim can be slid in such a manner that the coupling unit is easily inserted into the rim. When the coupling unit is inserted into the rim, the At least a part of the upper part is in contact with the bottom surface of the hook to prevent the coupling unit from being disengaged from the rim, and the coupling unit satisfies the mathematical formulae 1 to 3.

Here, Math 1 is

In the formula, L is the maximum length of the coupling unit, L _R is the length between the hooks of the rim, P is the maximum length of the hook protruding from the flange inner wall, R is 1/2 of the thickness of the hook, h Is the maximum height from the top to the bottom of the coupling unit, and H _R is the height of the inner wall of the flange.

In addition, Math 2 is

In the formula, h is the maximum height from the top to the bottom of the coupling unit, and H _R is the height of the inner wall of the flange.

In addition, Math. 3 is

In the formula, l is the minimum length between the side parts, L _R is the length between the hooks of the rim, P is the maximum length of the hook protruding from the flange inner wall, and R is 1/2 of the thickness of the hook , B is the maximum height from the top to the bottom of the coupling unit and 0.5 * (the maximum length of the coupling unit-the minimum length between the side portions).

According to an embodiment of the present invention, the bending elastic modulus (E _bend ) of the coupling unit may have a value from 140 Mpa to 7600 Mpa, but is not limited thereto.

According to an embodiment of the present invention, the length (c) of the sliding area can satisfy Mathematical Formula 4, but is not limited thereto.

Here, Math 4 is

In the formula, Δa is the length extending horizontally from the intersection of the horizontally extending dotted line from the lower end to the uppermost upper part and the vertical extending dotted line at one end of the longest part of the coupling unit, and Δb is the end from the lower end. The length at which the intersection of the horizontally extended dotted line to the uppermost upper part and one end of the longest part of the coupling unit of the vertically extended dotted line extends in the vertical direction.

According to an embodiment of the present invention, in a state where the coupling unit is inserted into the rim, at least a part of a sliding area of the coupling unit has a predetermined fixing to the inner wall of the flange by friction between the inner walls of the flange. force.

According to an embodiment of the present invention, the tire may include, but is not limited to, a solid tire made by an injection foaming method.

According to an embodiment of the present invention, an angle x formed by the side portion and the upper surface satisfies 0 ° <x <90 °, but is not limited thereto.

According to an embodiment of the present invention, the coupling unit may include a material selected from the group consisting of nylon, polyethylene, polypropylene, acetal, acrylonitrile-butadiene-styrene, polycarbonate, polyoxymethylene, PBT, fluororesin, and combinations thereof. The synthetic resin in the formed group is not limited thereto.

The bicycle tire according to the second aspect of the present invention, the rim and the tire can be combined by the coupling unit.

According to an embodiment of the present invention, at least a part of the side portion of the coupling unit may be combined with the surface of the inner wall of the flange of the rim, but is not limited thereto.

The problem solving means described above are merely examples, and should not be construed as limiting the intention of the present invention. In addition to the illustrated embodiments, there may be other additional embodiments in the drawings and detailed description of the invention.

According to the problem solving means of the present invention, by providing the coupling unit, even if an external impact is applied to the tire, the coupling unit can be prevented from being separated from the rim. When the coupling unit is inserted into the rim, It can be easily inserted into the rim. In the inserted state, at least a part of the upper surface of the coupling unit is in contact with the bottom surface of the hook.

According to the problem solving means of the present invention, when a tire is combined with a rim, there is an effect that a space can be secured inside the rim.

According to the problem solving means of the present invention, there is an effect that it is possible to prevent an accident caused by the coupling unit tire from being separated from the rim.

The effects obtainable in the present invention are not limited to the effects described above, but may have other effects.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings, so that those skilled in the art to which the present invention pertains can easily implement. However, the present invention can be embodied in various forms and is not limited to the embodiments described in this specification. In order to clearly illustrate the present invention, parts that are not related to the description are omitted in the drawings, and similar parts are marked with similar symbols throughout the specification.

In the entire specification of the present invention, when a part is “connected” with other parts, in addition to the case of “directly connected”, it also includes a case where other elements are “electrically connected” or “indirectly connected” in the middle.

In the entire specification of the present invention, when a certain component is located "above", "upper", "upper", "lower", "lower", "lower" of other components, except for a component in contact with other components In addition to the case, there are cases where there are other parts between the two parts.

In the entire specification of the present invention, when a certain part “contains” a certain constituent element, other constituent elements are not excluded, and other constituent elements may also be included if there is no particularly contrary description.

The invention relates to a coupling unit for coupling a tire to a rim. When the coupling unit is inserted into the rim for coupling, the coupling unit is easily inserted into the rim, and has been inserted into the rim. In the state of the rim, the coupling unit can be prevented from being detached from the rim due to an external impact or the like.

FIG. 1 is a state diagram of a coupling unit separated from a rim according to an embodiment of the present invention.

Referring to FIG. 1, a coupling unit 10 according to an embodiment of the present invention may be used to couple a tire to a rim 20 of a bicycle, that is, a unit for coupling a tire to the rim 20. The coupling unit 10 may also be referred to as a fixing member, a rim fixing portion, and the like, but is not limited thereto.

Prior to specific description, the coupling unit 10 according to an embodiment of the present invention may be formed such that both sides of the coupling unit 10 are inclined at a predetermined angle so that when the coupling unit 10 is inserted into the rim 20, the coupling unit 10 may be easily inserted into the rim 20. Inside. At this time, the angle formed by the side surface portion and the upper surface of the coupling unit 10 according to an embodiment of the present invention may satisfy 0 ° <x <90 °. It is easier to understand with reference to Figure 2a.

Figure 2a shows the case where the side surface is not inclined, that is, for a coupling unit whose angle (x) formed by the side surface of the coupling unit and the upper surface is 90 °, and the side surface is inclined (0 ° <x <90 °) ) Coupling unit, a schematic diagram of the process of inserting the coupling unit into the rim. Specifically, (a) of FIG. 2a shows the process when the coupling unit without a tilt on the side is inserted into the rim, and (b) of FIG. 2a shows the coupling unit 10 according to an embodiment of the present invention. There is a process when the inclined coupling unit is inserted into the rim.

Please refer to Figure 2a, comparing (a) the coupling unit that is not inclined on the side portion and (b) the coupling unit that is inclined on the side portion. It can be seen that when the coupling unit is inserted into the rim hook, the situation in (a) Greater deformation occurred on the coupling element.

In other words, it was confirmed that in order to insert the coupling unit into the rim, the coupling unit that does not have an inclination at the side portion needs to be bent more than the coupling unit that has an inclination at the side portion. This means that when the coupling unit is inserted into the rim, a greater force should be applied to a coupling unit that does not have a tilt on the side than a coupling unit that has a tilt on the side, or a coupling unit that does not have a tilt on the side Compared with a coupling unit with an inclined side, it should have greater flexibility. Accordingly, when the coupling unit is inserted into the rim, there is a problem that the coupling unit that does not have an inclination on the side portion requires more force than the coupling unit that has an inclination on the side, and the manufacturing conditions are complicated. When the coupling unit has flexibility, it is easy to insert the coupling unit into the rim, but there is a problem that the coupling is easily detached after being inserted and the stability is reduced.

Since the coupling unit with an angle of 90 ° or more formed by the side portion and the upper surface is difficult to insert into the rim, the coupling unit 10 according to an embodiment of the present invention provides that the angle formed by the side portion and the upper surface satisfies 0 ° <x < The 90 ° coupling unit can easily insert the coupling unit 10 into the rim without applying a large force, and requires a predetermined flexibility, so it has the advantage of being easy to manufacture. The coupling unit 10 according to an embodiment of the present invention has predetermined flexibility. Therefore, not only can the coupling unit 10 be easily inserted into the rim, but also the coupling unit is not easily detached from the rim in the inserted state, and the stability can be further improved. The details are as follows.

Referring to FIG. 1, a coupling unit 10 according to an embodiment of the present invention can be inserted into a rim 20, and can include an upper surface 11, a lower surface 12, and side portions 13 a and 13 b.

In a state where the coupling unit is inserted into the rim, the upper surface 11 is in contact with the bottom surfaces of the hooks 21a, 21b of the rim 20 to prevent the coupling unit from detaching from the rim. When the rim is combined with the tire, the upper surface 11 may be a surface including a portion that contacts a bottom surface of the hooks 21a, 21b. An additional member may be formed on the upper surface 11 to improve the binding force between the rim and the tire.

The maximum length L of the coupling unit 10 may be longer than the distance L _R between the two hooks 21 a and 21 b of the rim 20. The shape of the coupling unit 10 in FIG. 1 is only helpful for understanding one embodiment of the present invention, and is not limited to this. As an embodiment, the shapes of the side surfaces 13a and 13b of the coupling unit 10 can be variously embodied. Please refer to Figure 2b for easier understanding.

FIG. 2b is a diagram illustrating an example of a shape of a coupling unit according to another embodiment of the present invention.

Referring to FIG. 2b, the side surface of the coupling unit according to another embodiment of the present invention may have a double-angled shape as shown in FIG. 2b (a), or a positive angle on the upper surface of the coupling unit as shown in FIG. 2b (b). Shape of lines and curves. The side portion of the coupling unit according to another embodiment of the present invention may have a shape protruding outward as shown in FIG. 2b (c), such as a convex shape protruding toward the upper surface of the coupling unit as shown in FIG. 2b (d), as shown in FIG. 2b. Figure (e) combines the shapes of individual parts that can be cut at the side. The above embodiments are merely examples for helping to understand the present invention, and are not limited thereto, and may be embodied in more diverse forms. Thereby, the maximum length of the above-mentioned coupling unit or the length from the bottom to the uppermost of the above-mentioned coupling unit, etc. can be determined depending on the shape thereof.

Please refer to FIG. 1 again. When the coupling unit 10 is inserted into the rim 20, in order to facilitate the coupling unit 10 to be inserted into the rim 20, the side portions 13a and 13b may include a sliding area where the hooks 21a and 21b of the rim 20 slide. . In addition, in a state where the rim 20 has been inserted into the coupling unit 10, at least a part of the upper surface 11 of the coupling unit 10 is in contact with the bottom surfaces of the hooks 21 a and 21 b, thereby preventing the coupling unit 10 from detaching from the rim 20.

In order for the coupling unit 10 to be easily inserted into the rim 20 by sliding and to prevent the coupling unit 10 inserted into the rim 20 from being easily detached from the rim 20, the coupling unit 10 must satisfy the conditions described later, which will be described in detail below.

FIG. 3 is an explanatory diagram of conditions for preventing the coupling unit 10 from being detached from the rim 20 after being inserted into the rim 20 according to an embodiment of the present invention.

Referring to FIG. 3, after the coupling unit 10 is inserted into the rim 20, in order to prevent the coupling unit 10 from being detached from the rim 20 due to an external impact, the maximum length of the coupling unit 10 can satisfy the following mathematical formula 1.

[Mathematical formula 1]

In the formula, L is the maximum length of the coupling unit 10, L _R is the length between the two hooks 21a, 21b of the rim 20, and P is the hook 21a from the left side of the inner wall of the rim 20 or the right The maximum length of the hook 21b protruding, R is 1/2 of the thickness of the hooks 21a, 21b, h is the maximum height from the upper 11 to the lower 12 of the coupling unit 10, and H _R is the inside of the flange of the rim 20 The height of the wall.

When the maximum length L of the coupling unit 10 cannot satisfy the condition of the mathematical formula 1 (that is, the maximum length L is less than the condition of the mathematical formula 1), during the bicycle running, the coupling unit inserted into the rim 20 due to the external force applied to the tire 10 is easily detached from the rim 20. Therefore, the maximum length L of the coupling unit 10 preferably satisfies the condition of the mathematical expression 1.

In addition, FIG. 4 is an explanatory diagram of conditions for ensuring space in the rim 20 when the coupling unit 10 has been inserted into the rim 20 according to an embodiment of the present invention. FIG. 4 shows that the rim 20 has been inserted into the coupling. The status of the unit 10.

Referring to FIG. 4, when the rim 20 is inserted into the coupling unit 10, at least a part of the upper surface 11 of the coupling unit 10 is in contact with the bottom surfaces of the two hooks 21 a and 21 b of the rim 20, thereby preventing external shocks. The iso-coupling unit 10 is detached from the rim 20. Here, when the coupling unit 10 is inserted into the rim 20, in order to ensure a space in the rim 20 after the tire and the rim 20 are combined, the maximum height of the coupling unit 10 may satisfy Mathematical Formula 2.

[Mathematical formula 2]

In the formula, h is the maximum height from the upper surface 11 to the lower surface 12 of the coupling unit 10, and H _R is the height of the flange inner wall of the rim 20.

Thereby, in order to secure space in the rim 20, the maximum height h of the upper surface 11 to the lower surface 12 of the coupling unit 10 may be equal to or less than the height H _{R of the} inner wall of the flange.

When the coupling unit 10 is inserted into the rim 20, there is no space between the lower surface of the coupling unit 10 and the inner side surface of the lower surface of the rim 20, for example, it is difficult to remove the coupling unit 10 from the rim 20 when replacing the coupling unit 10. The problem. In addition, when the coupling unit 10 inserted into the rim 20 has no space in the rim 20, a tire surrounding the outer surface of the lower side of the coupling unit 10 does not exist, and the tire cannot be accurately coupled to the rim 20. At this time, even if the coupling unit is inserted into the rim 20, the tire is easily separated from the rim 20. Accordingly, the maximum height h of the coupling unit 10 preferably satisfies the condition of the mathematical expression 2.

FIG. 5 is an explanatory diagram of conditions under which the coupling unit 10 is inserted into the rim 20 by sliding according to an embodiment of the present invention.

Referring to FIG. 5, in order to insert the coupling unit 10 into the rim 20 by sliding, the minimum length between the side portions 13 a and 13 b can satisfy Mathematical Formula 3.

[Mathematical formula 3]

In the formula, l is the minimum length between the side portions 13a, 13b of the coupling unit 10, L _R is the length between the two hooks 21a, 21b of the rim 20, and P is the hook 21a, 21b from the rim 20 The maximum length of the protruding inner wall of the flange, R is 1/2 of the thickness of the hook. In addition, b is a length that is half the length from the maximum height h from the upper surface 11 to the lower surface 12 of the coupling unit 10 and the length corresponding to the maximum length L of the coupling unit 10 minus the minimum length l between the side portions 13a, 13b Elders. In other words, b is the larger of the "h" value and the "0.5 * (Ll) (ie ((Ll) / 2)" value).

When the minimum length l between the sides 13a, 13b of the two sides of the coupling unit 10 does not satisfy the condition of the mathematical formula 3 and is too long, as shown in (a) of FIG. 2a above, the coupling unit 10 needs to be bent too much or needs to be inserted too much. Therefore, it is difficult to insert the coupling unit 10 into the rim 20, or it cannot be inserted at all. In addition, when the minimum length l is too long, there is a problem that there is no space in the rim 20 in a state where the coupling unit 10 has been inserted into the rim 20. The minimum length l between the two side surfaces 13a, 13b of the coupling unit 10 according to an embodiment of the present invention preferably satisfies the condition of Equation 3.

Furthermore, in order to easily insert the coupling unit 10 into the rim 20 according to an embodiment of the present invention, as described above, the angle x between the upper surface 11 and the side portions 13a, 13b of the coupling unit 10 may be formed to satisfy 0 ° < x <90˚.

FIG. 6 is an explanatory diagram of a length of a sliding area of a coupling unit according to an embodiment of the present invention.

Referring to FIG. 6, as described above, the side portions 13 a and 13 b of the coupling unit 10 according to an embodiment of the present invention may have a straight line shape as shown in FIG. 1, but is not limited thereto. Curve-shaped coupling unit 10 '. As an example, as shown in FIG. 6, the length of the sliding area c of the side surface portion and the upper surface having the protruding-shaped coupling unit 10 ′ may be the length of the elliptic curve connecting the uppermost part of the coupling unit to the lower surface. .

Thereby, the length c of the sliding area in the coupling units 10, 10 'according to an embodiment of the present invention can satisfy Mathematical Formula 4.

[Mathematical formula 4]

In the formula, Δa is a length extending horizontally from the intersection of the horizontally extending dotted line from the end of the lower 12 to the uppermost portion of the upper 11 and the vertical extending dotted line at the end of one of the longest portions of the coupling units 10 and 10 ′, and Δb It is a length extending in the vertical direction from the intersection of the horizontally extending dotted line from the end of the lower surface 12 to the uppermost part of the upper surface 11 and the end of one of the longest portions of the longest portions of the coupling units 10 and 10 '.

In a state where the rim 20 has been inserted into the coupling unit 10, at least a part of the sliding area of the coupling unit 10 may have a predetermined fixing force on the flange inner wall due to friction with the flange inner wall of the rim 20. Here, in a state where the coupling unit 10 has been inserted into the rim 20 in FIG. 4, in order for the coupling unit 10 to have a fixed force at a corresponding position in the rim 20, the coupling unit 10 may satisfy 'L> L _R + 2P'. That is, the maximum length L of the coupling unit 10 is set to be longer than the length L _R between the two hooks of the rim 20 plus the hooks 21a, 21b on both sides protruding from the inner wall of the flange of the rim 20 ( That is, the value of 2P) is larger, whereby the coupling unit 10 can have a predetermined fixing force in the rim 20.

The coupling unit 10 according to an embodiment of the present invention has a shape that satisfies Mathematical Formulas 1 to 3 and Mathematical Formula 4, and can be easily inserted into the rim 20 without inserting a large force. In addition, after the coupling unit 10 is inserted into the rim 20, the coupling unit 10 can be fixed in the rim 20 without being separated from the rim 20.

FIG. 7 is a simulation result diagram performed on the coupling unit 10 according to an embodiment of the present invention. Specifically, in FIG. 7, in order to determine the suitability of the coupling unit 10, whether the coupling unit 10 satisfies the simulation results represented by the mathematical expressions 1 to 3 is determined. The unit of the numerical value in Fig. 7 is mm.

Referring to FIG. 7, for a simulation result of the coupling unit 10 according to an embodiment of the present invention, when the coupling unit 10 does not satisfy at least one of the conditions of the mathematical formulas 1 to 3 (that is, any one of the mathematical formulas 1 to 3 X ), As a comprehensive judgment result of the suitability judgment of the tire coupling unit of the rim 20, if it is x, it is considered that the coupling unit 10 is not suitable as a tire coupling unit.

In contrast, when the coupling unit 10 according to one embodiment of the present invention satisfies all the conditions of the mathematical formulae 1 to 3, as a comprehensive judgment result of the suitability judgment of the tire coupling unit of the rim 20, the coupling unit 10 is regarded as the coupling unit. 10 is suitable as a tire coupling unit.

The meaning of the comprehensive judgment result is explained here. When the coupling unit 10 does not satisfy the condition of the mathematical formula 1 (that is, the mathematical formula 1 is X) means that the coupling unit 10 is easily separated from the rim 20, and the coupling unit 10 does not satisfy the mathematical formula 2. (That is, the mathematical formula 2 is X) means that there is no space in the rim 20 when the coupling unit 10 has been inserted into the rim 20. In addition, when the coupling unit 10 does not satisfy Formula 3 (that is, Formula 3 is X), it means that the coupling unit 10 cannot be easily inserted into the rim 20 by sliding.

A comprehensive judgment result of O means that the coupling unit 10 according to an embodiment of the present invention satisfies all the conditions of the mathematical formulae 1 to 3, which means that the coupling unit 10 according to an embodiment of the present invention can be easily inserted into the rim 20, and In a state where the coupling unit is inserted into the rim 20, the shape of the coupling unit 10 can be easily prevented from being detached from the rim 20 while ensuring space in the rim 20, and it can be understood that the coupling unit 10 is suitable as a tire Coupling unit.

FIG. 8 is an explanatory diagram of physical property conditions of the coupling unit 10 according to an embodiment of the present invention.

Referring to FIG. 8, a coupling unit 10 according to an embodiment of the present invention may have a value of a bending elastic modulus (E _bend ) of more than 140 Mpa and less than 7600 Mpa to prevent the coupling unit 10 from being applied after the rim 20 is combined with the tire. The load F is bent. That is, the coupling unit 10 according to an embodiment of the present invention can satisfy physical property conditions including a value of a bending elastic modulus (E _bend ) of not less than 140 Mpa and not more than 7600 Mpa in order to prevent bending. Refer to Figure 9 for easier understanding.

FIG. 9 is a simulation result diagram of a range of a bending elastic modulus of the coupling unit 10 according to an embodiment of the present invention.

Please refer to FIG. 9, a simulation result of the bending elastic modulus of the coupling unit 10 according to an embodiment of the present invention. When the bending elastic modulus of the coupling unit 10 is less than 140 Mpa, the coupling unit 10 is excessively bent and easily detached from the rim 20. When the bending elastic modulus of the coupling unit 10 is 7600 Mpa or more, the coupling unit 10 is not easily bent. Therefore, when the coupling unit 10 needs to be replaced, it cannot be replaced.

As a condition that the coupling unit 10 is overloaded or is not easily bent under the load of one embodiment of the present invention, the bending elastic modulus of the coupling unit 10 may have a value from 140 Mpa to 7600 Mpa.

The bending elastic modulus of the coupling unit 10 according to an embodiment of the present invention is most preferable under the following conditions, the condition is that the distance Δh between the two hooks of the rim 20 is 20 mm, the maximum length L of the coupling unit 10 is 21.5 mm, and the coupling The width w of the unit 10 is 5 mm, the height h of the coupling unit 10 is 2.5 mm, and the load F is 20 kgf.

FIG. 10 is a schematic cross-sectional view of a bicycle tire combined with a rim 20 and a tire 30 by a coupling unit 10 according to an embodiment of the present invention.

Referring to FIG. 10, according to an embodiment of the present invention, a bicycle tire combining a rim 20 and a tire 30 by the coupling unit 10 according to an embodiment of the present invention as described above can be provided.

Here, at least a part of the side portions 13a, 13b of the coupling unit 10 may be in contact with the surface of the flange inner wall of the rim 20, in other words, at least a portion of the side portions 13a, 13b may be in contact with the flange inner wall surface. Touch and combine.

In addition, the coupling unit 10 according to an embodiment of the present invention may include a member selected from nylon (Nylon), polyethylene (Poly Ethylene, PE), polypropylene (Polypropylene, PP), acetal, and acrylonitrile-butane. Synthetic resins in the group consisting of acrylonitrile-butadiene-styrene, polycarbonate (Poly carbinate, PC), polyacetal (Polyacetal), PBT, fluororesin (Fluororesin), and combinations thereof, omitted here Specific description of each component.

The tire 30 coupled to the rim 20 through the coupling unit 10 according to an embodiment of the present invention may include a solid tire manufactured by an injection foaming method, but is not limited thereto.

The shape of the coupling unit 10 according to an embodiment of the present invention is a shape that can be easily inserted into the rim 20 when inserted into the rim 20 and is not easily detached from the rim 20 when inserted into the rim 20. In order to ensure ample space in the rim 20, when inserted into the rim 20, a part of the tire 30 surrounds the outer side surface of the lower side of the coupling unit 10, whereby the bicycle can run more stably.

The description of the present invention has been described above by way of example. It should be understood that those skilled in the art to which the present invention pertains can easily be modified and implemented in other specific forms without changing the technical idea or necessary features of the present invention. Therefore, the specific embodiments / embodiments described above are illustrative in all aspects and are not intended to limit the present invention. For example, the constituent elements described in a single type may be implemented in a distributed manner. Similarly, the constituent elements described in a distributed manner may be implemented in a combined manner.

It should be understood that the scope of the present invention is determined not by the above description but by the scope of patent application, and all changes or deformations derived from the meaning and scope of the patent scope and concepts equivalent thereto belong to the scope of the present invention.

10‧‧‧Coupling unit

11‧‧‧ above

12‧‧‧ below

13a, 13b‧‧‧Side

20‧‧‧ Wheel

21a, 21b

L‧‧‧ Maximum length of coupling unit

L _R ‧‧‧ Length between the hooks of the rim

P‧‧‧ Maximum length of hook protruding from inner wall of flange

R‧‧‧Hook thickness 1/2

h‧‧‧ Maximum height from above to below the coupling unit

H _R ‧‧‧ height of flange inner wall

l‧‧‧ minimum length between sides

b‧‧‧ the maximum height from the top to the bottom of the coupling unit and 0.5 * (the maximum length of the coupling unit-the minimum length between the sides)

30‧‧‧ Tire

FIG. 1 is a state diagram of a coupling unit separated from a rim according to an embodiment of the present invention.

Fig. 2a is a schematic diagram of a process in which the coupling unit is inserted into the rim for a coupling unit that is not inclined at the side portion and a coupling unit that is inclined at the side portion.

FIG. 2b is a diagram illustrating an example of a shape of a coupling unit according to another embodiment of the present invention.

FIG. 3 is an explanatory diagram of conditions for preventing the coupling unit from being detached from the rim after being inserted into the rim according to an embodiment of the present invention.

FIG. 4 is an explanatory diagram of conditions for ensuring space in the rim when the coupling unit is inserted into the rim according to an embodiment of the present invention.

FIG. 5 is an explanatory diagram of conditions under which a coupling unit is inserted into a rim by sliding according to an embodiment of the present invention.

FIG. 6 is an explanatory diagram of a length of a sliding area of a coupling unit according to an embodiment of the present invention.

FIG. 7 is a diagram of a simulation result performed on a coupling unit according to an embodiment of the present invention.

FIG. 8 is an explanatory diagram of physical property conditions of a coupling unit according to an embodiment of the present invention.

FIG. 9 is a simulation result diagram of a range of a bending elastic modulus of a coupling unit according to an embodiment of the present invention.

Fig. 10 is a schematic cross-sectional view of a bicycle tire combined with a tyre of a coupling unit according to an embodiment of the present invention.

Claims (9)

A coupling unit for coupling a tire to a wheel rim, including upper, lower, and side portions. The maximum length of the coupling unit is longer than the length between two hooks of the wheel rim. The side portion includes a sliding area, so that When the rim is inserted into the coupling unit, the hook of the rim can be slid in such a way that the coupling unit is easily inserted into the rim. When the coupling unit is inserted into the rim, at least a part of the upper part is connected with the hook The bottom surface contacts to prevent the coupling unit from detaching from the rim. The coupling unit satisfies [Mathematical formula 1] to [Mathematical formula 3]; [Mathematical formula 1] is In the formula, L is the maximum length of the coupling unit, L _R is the length between the hooks of the rim, P is the maximum length of the hook protruding from the flange inner wall, R is 1/2 of the thickness of the hook, h Is the maximum height from the top to the bottom of the coupling unit, and H _R is the height of the inner wall of the flange; [Mathematical formula 2] is In the formula, h is the maximum height from the top to the bottom of the coupling unit, and H _R is the height of the inner wall of the flange; and [Mathematical formula 3] is In the formula, l is the minimum length between the side parts, L _R is the length between the hooks of the rim, P is the maximum length of the hook protruding from the flange inner wall, and R is 1/2 of the thickness of the hook , B is the longer of the maximum height from the top to the bottom of the coupling unit and 0.5 * (the maximum length of the coupling unit-the minimum length between the side portions). The coupling unit according to item 1 of the scope of the patent application, wherein the bending elastic modulus (E _bend ) of the coupling unit has a value from 140 Mpa to 7600 Mpa. The coupling unit according to item 1 of the scope of patent application, wherein the length (c) of the sliding area satisfies [Mathematical formula 4]; wherein [mathematical formula 4] is In the formula, Δa is the length extending horizontally from the intersection of the horizontally extending dotted line from the lower end to the uppermost upper part and the vertical extending dotted line at one end of the longest part of the coupling unit, and Δb is the end from the lower end. The length at which the intersection of the horizontally extended dotted line to the uppermost upper part and one end of the longest part of the coupling unit of the vertically extended dotted line extends in the vertical direction. The bicycle tire according to item 1 of the scope of patent application, wherein, in a state where the coupling unit is inserted into the rim, at least a part of a sliding area of the coupling unit is controlled by friction between inner walls of the flange. The flange inner wall has a predetermined fixing force. The coupling unit according to item 1 of the patent application scope, wherein the tire comprises a solid tire manufactured by an injection foaming method. The coupling unit according to item 1 of the patent application scope, wherein an angle (x) formed by the side surface portion and the upper surface satisfies 0 ° <x <90 °. The coupling unit according to item 1 of the scope of patent application, wherein the coupling unit comprises a coupling unit selected from the group consisting of nylon, polyethylene, polypropylene, acetal, acrylonitrile-butadiene-styrene, polycarbonate, polyoxymethylene, PBT , Fluororesin, and synthetic resins in a group of combinations thereof. A bicycle tire in which a rim and a tire are combined by a coupling unit as described in item 1 of the scope of patent application. The bicycle tire according to item 8 of the scope of patent application, wherein at least a part of a side surface portion of the coupling unit is in contact with a surface of a flange inner wall of the rim to be coupled.