KR101759514B1 - Coupling unit - Google Patents

Abstract

Wherein the fastening unit includes an intermediate member, a left member extending to the left from the intermediate member, and a right member extending from the intermediate member to the right, wherein the fastening unit includes a left member and a right member, Wherein the right side member includes a first side portion and a second side portion and the second side portion is slidably engaged with the hook of the rim so that the fastening unit is easily inserted into the rim in the progressing state of the fastening unit with respect to the rim Wherein the maximum length of the fastening unit is such that at least a portion of the first side portion of the left member is in surface contact with the left side rim flange inner wall and at least a portion of the first side portion of the right member is in contact with the right rim flange & So that an elastic bending deformation is generated in the fastening unit in a state in which the flange is in contact with the inner wall surface-contacted. The first side portion of the left member and / or the first side portion of the right member may be provided so as to be in surface contact with the inner surface of the rim flange by the elastic bending restoring force acting by the elastic bending deformation.

Description

[0001] COUPLING UNIT [0002]

The present invention relates to a fastening unit for fastening a tire to a bicycle rim.

Recently, the spread of urban and mountain type bicycles has spread widely due to the growing awareness of environmentally friendly and low-carbon movements. In the case of a pneumatic tire with a built-in tube, which is commonly used, there is a high risk of puncture. There is an inconvenience that air is leaked and air is injected again.

In order to solve this problem, there is an increasing demand for solid tires instead of pneumatic tires recently. A solid tire is a tire made of only rubber rather than air. It has a merit that it can be used for a long time compared with a pneumatic tire, has no risk of puncture, and is easy to attach and detach to a bicycle rim. (Or mounted, fixed) to the rim by means of a rim unit, a fastening unit, etc.).

When the impact applied to the tire is biased in either the right or left direction when the tire is mounted on the rim, the tire is separated from the rim as the pin for fixing the tire is removed from the rim, Can lead to problems. Therefore, there is a need to develop a technique that can solve this problem.

The background technology of the present application is disclosed in Korean Patent Registration No. 0943331. The Korean Patent Publication discloses a structure in which a rim and a tire are mounted by a stopper, but there is a problem that the stopper does not recognize the condition or physical condition of the shape that the stopper should have.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a fastening unit for preventing a fixing pin of a tire from being detached from a rim even when an external impact or the like is applied to a tire mounted on a bicycle rim.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a fastening unit for fastening a tire to a rim so as to prevent a safety accident caused by separation of a tire from a rim.

It is to be understood, however, that the technical scope of the embodiments of the present invention is not limited to the above-described technical problems, and other technical problems may exist.

As a technical means for achieving the above technical object, a fastening unit according to the first aspect of the present invention includes an intermediate member, a left member extending leftward from the intermediate member, and a right member extending from the intermediate member to the right Wherein the left side member and the right side member include a first side surface portion and a second side surface portion and the second side surface portion is formed in the rim so that the fastening unit is easily inserted into the rim in the insertion progress state of the fastening unit with respect to the rim Wherein the maximum length of the fastening unit is such that at least a portion of the first side portion of the left member is in face contact with the left side rim flange inner wall and at least a portion of the first side portion of the right member Is brought into surface-contact with the inner surface of the rim flange on the right side so that elastic deformation is generated in the fastening unit, And the first side surface portion of the left member and / or the first side surface portion of the right side member are provided so as to be in surface contact with the inner surface of the rim flange by the elastic bending restoring force acting by the elastic bending deformation .

According to an embodiment of the present invention, the maximum length L of the fastening unit may satisfy the following equation (1), but is not limited thereto.

이며, 수학식 1에서

,

, L _R 은 림의 후크 사이의 길이, P는 플랜지 내벽으로부터 후크가 돌출된 최대 길이, h는 체결 유닛의 상면으로부터 하면까지의 최대 높이, 및 H _R 은 플랜지 내벽의 높이를 나타낸다.Here, Equation (1)

, And in Equation (1)

,

, L _R is the length between the rim hook, P is the maximum length, h hook is projected from the inner wall of the flange has a maximum height of up to when the upper surface of the engage unit, and _R H represents a height of the inner wall of the flange.

According to an embodiment of the present invention, the maximum height h from the top surface to the bottom surface of the fastening unit may satisfy the following equation (2), but is not limited thereto.

이며, 수학식 2에서 L은 체결 유닛의 최대 길이, L _R 은 림의 후크 사이의 길이, P는 플랜지 내벽으로부터 후크가 돌출된 최대 길이, h는 체결 유닛의 상면으로부터 하면까지의 최대 높이, 및 H _R 은 플랜지 내벽의 높이를 나타낸다.Here, Equation (2)

Where L is the maximum length of the fastening 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, h is the maximum height from the upper surface to the lower surface of the fastening unit, H _R represents the height of the flange inner wall.

According to an embodiment of the present invention, the tightening unit may satisfy the following equations (3) to (5), but is not limited thereto.

이며, 수학식 3에서 L은 체결 유닛의 최대 길이, L _R 은 림의 후크 사이의 길이, P는 플랜지 내벽으로부터 후크가 돌출된 최대 길이, R은 후크 두께의 1/2, h는 체결 유닛의 상면으로부터 하면까지의 최대 높이 및 H _R 은 플랜지 내벽의 높이를 나타낸다.Here, Equation (3)

And, L is a fastening unit up to a length, L _R is the length between the rim hook, P is the maximum length of the hook is projected from the inner wall of the flange, R is 1/2, h is the thickness of the hook fastening unit in the formula (3) The maximum height from the upper surface to the lower surface and H _R represents the height of the flange inner wall.

이며, 수학식 4에서 h는 체결 유닛의 상면으로부터 하면까지의 최대 높이 및 H _R 은 플랜지 내벽의 높이를 나타낸다.Equation (4)

And, from equation 4 h denotes the maximum height H and _R is the height of the inner wall of the flange up to when the upper surface of the engage unit.

이며, 수학식 5에서 l은 좌측부재와 우측부재 사이의 최소 길이, L _R 은 림의 후크 사이의 길이, P는 플랜지 내벽으로부터 후크가 돌출된 최대 길이, R은 후크 두께의 1/2, b는 체결 유닛의 상면으로부터 하면까지의 최대 높이 및 0.5*(체결 유닛의 최대 길이- 좌측부재와 우측부재 사이의 최소 길이) 중 긴 것을 나타낸다.Equation (5)

And, in equation 5 l is a left member and a minimum distance between the right member, L _R is _the length between the rim hook, P is the maximum length, the hook is projected from the flange inner wall R is a hook thickness 1/2, b Is the maximum height from the upper surface to the lower surface of the fastening unit and 0.5 * (the maximum length of the fastening unit - the minimum length between the left member and the right member).

According to an embodiment of the present invention, the flexural modulus E _bend of the fastening unit may include a value of 140 MPa or more and 7600 MPa or less, but is not limited thereto.

According to an embodiment of the present invention, the length (c) of the sliding region may satisfy Equation (6), but is not limited thereto.

이며, 수학식 6에서 Δa는 하면의 끝단으로부터 상면의 최상부의 수평 연장 가상선과 체결 유닛의 최장부의 일 끝단의 수직 연장 가상선의 교차점까지 수평방향으로 연장된 길이, 및 Δb는 하면의 끝단으로부터 상면의 최상부의 수평 연장 가상선과 체결 유닛의 최장부의 일 끝단의 수직 연장 가상선의 교차점까지 수직방향으로 연장된 길이를 나타낸다.Here, Equation (6)

In Equation (6),? A is the length extending in the horizontal direction from the end of the lower surface to the intersection of the upper virtual horizontal line extending from the lower end of the lower surface and the vertically extending virtual line at one end of the longest portion of the fastening unit, and? And a length extending in the vertical direction from the uppermost horizontal extending virtual line to the intersection of the virtual line extending vertically at one end of the longest portion of the fastening unit.

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

According to an embodiment of the present invention, the angle? _A formed by the first side surface portion and the upper surface may satisfy 0? <? _A <90?, But is not limited thereto.

According to an embodiment of the present invention, the angle &thgr; _a between the first side surface and the upper surface and the angle &thgr; _b between the second side surface and the upper surface can satisfy the relation of θ _a > θ _b , no.

According to one embodiment of the present application, the fastening unit comprises a synthetic resin selected from the group consisting of nylon, polyethylene, polypropylene, acetal, acrylonitrile butadiene styrene, polycarbonate, polyacetal, PBT, fluororesin, . &Lt; / RTI &gt;

According to an embodiment of the present invention, the intermediate member, the left member, and the right member may be made of the same material, but the present invention is not limited thereto.

The bicycle tire according to the second aspect of the present invention can be combined with the rim and the tire by the above-described fastening unit.

According to one embodiment of the invention, at least a portion of the first side portion of the left member of the fastening unit and / or at least a portion of the first side portion of the right member of the fastening unit may be in surface contact with the flange inner wall of the rim But is not limited thereto.

The above-described task solution is merely exemplary and should not be construed as limiting the present disclosure. In addition to the exemplary embodiments described above, there may be additional embodiments in the drawings and the detailed description of the invention.

According to the above-mentioned problem solving means of the present invention, the fastening unit can be easily inserted into the rim in the progressing state of the fastening unit with respect to the rim, and the first side surface portion of the left member and / So that the fastening unit can be prevented from being detached from the rim even if an external impact or the like is applied to the tire.

Further, since the first side surface portion of the left member and / or the first side surface portion of the right side member are in surface contact with the inner surface of the rim flange by the elastic bending restoring force, the adhesion between the rim and the fastening unit is strengthened, It is possible to achieve an effect of reducing noise generated by friction between the fastening units.

According to the above-mentioned problem solving means of the present invention, the unit is brought into surface contact with the inner surface of the rim flange so as to secure a clearance space inside the rim, thereby improving the coupling force between the tire and the rim, There is an effect that the unit can be easily removed from the rim.

According to the above-mentioned problem solving means of the present invention, it is possible to prevent a safety accident problem caused when the tire is separated from the rim through the fastening unit.

However, the effects obtainable here are not limited to the effects as described above, and other effects may exist.

1 is a view illustrating a state in which a fastening unit according to an embodiment of the present invention is separated from a rim and coupled to a rim.
Fig. 2 is a view schematically showing a process when the fastening unit is inserted into the rim, with respect to (a) a fastening unit without a slope on a side portion and (b) a fastening unit according to an embodiment of the present invention, .
FIG. 3 is a view showing a state in which the fastening unit according to an embodiment of the present invention is completely inserted into the rim and there is no clearance in the rim.
FIG. 4 is a view showing a state in which the fastening unit has no clearance space in the thickened state in a state where the fastening unit according to the embodiment of the present application is completely inserted into the rim.
5 is a view for explaining conditions for preventing the fastening unit according to an embodiment of the present invention from being detached from the rim after being inserted into the rim.
FIG. 6 is a view for explaining a condition for securing a clearance in the rim when the fastening unit according to an embodiment of the present invention is inserted into the rim.
7 is a view for explaining conditions for inserting a fastening unit according to an embodiment of the present invention into a rim through a sliding.
8 is a view for explaining a length of a sliding region of a fastening unit according to an embodiment of the present invention.
FIG. 9 is a view showing a result of a simulation performed on a fastening unit according to an embodiment of the present invention.
FIG. 10 is a view for explaining physical conditions of a fastening unit according to an embodiment of the present invention. FIG.
11 is a view showing a simulation result of a range of flexural modulus of a fastening unit according to an embodiment of the present invention.
12 is a schematic cross-sectional view of a tire for a bicycle in which a rim and a tire are coupled by a fastening unit according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention. It should be understood, however, that the present invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In the drawings, the same reference numbers are used throughout the specification to refer to the same or like parts.

Throughout this specification, when an element is referred to as being "connected" to another element, it is intended to be understood that it is not only "directly connected" but also "electrically connected" or "indirectly connected" "Is included.

It will be appreciated that throughout the specification it will be understood that when a member is located on another member "top", "top", "under", "bottom" But also the case where there is another member between the two members as well as the case where they are in contact with each other.

Throughout this specification, when an element is referred to as "including " an element, it is understood that the element may include other elements as well, without departing from the other elements unless specifically stated otherwise.

The present invention relates to a fastening unit for fastening a tire to a bicycle rim, in which the fastening unit is easily inserted into the rim when the fastening unit is inserted into the rim for fastening, Thereby preventing the fastening unit from being detached from the rim due to an external impact or the like.

1 is a view illustrating a state in which a fastening unit according to an embodiment of the present invention is separated from a rim.

1, a fastening unit 10 according to one embodiment of the present disclosure includes a fastening unit for fastening a tire to a bicycle rim 20, that is, a fastening unit for fastening a tire to a rim 20 May mean a unit. The fastening unit 10 may be referred to as a fixing pin, a limb guide, or the like, but is not limited thereto.

The fastening unit 10 according to one embodiment of the present disclosure is configured to include the fastening unit 10 so that the fastening unit 10 can be easily inserted into the rim 20 when the fastening unit 10 is inserted into the rim 20. [ The left side member 13 and the right side member 14 to be described later as both side members may be formed to have a predetermined inclination with respect to the upper surface of the fastening unit 10. [ More specifically, in the case of the fastening unit 10 according to one embodiment of the present application, the left member 13 includes a first side portion 13a and a second side portion 13b, And may include a side surface portion 14a and a second side surface portion 14b. The angle formed by the first side surface portions 13a and 14a and the top surface 11, that is, the angle formed by the left side first side surface portion 13a and the top surface 11, and / or the angle between the right first side surface portion 14a and the top surface 11, The angle θ _a formed between the first and second electrodes 11 can satisfy 0 ° <θ _a <90 °. In addition, the first side portion (13a, 14a) and the upper surface 11 are each θ _a and the second side surface (13b, 14b) and each θ _b the upper surface 11 is forming forms can satisfy the relation of θ _a> θ _b have. On the other hand, the effect that the angle between the first side surface portions 13a, 14a and the upper surface and / or the relationship between? _A and? _B satisfy the above condition can be more easily understood with reference to Fig.

FIG. 2 is a perspective view of a fastening unit (i.e., a fastening unit having an angle of 90 degrees between a side surface of the fastening unit and an upper surface) and a fastening unit having a tapered side surface (i.e., a fastening unit according to one embodiment of the present invention) , The angle? _A formed by the first side surfaces 13a, 14a and the upper surface 13a is equal to 0 占 <? _A <90 占 and? _A is larger than? _B ), the process when the fastening unit is inserted into the rim Fig. 2 (b) is a side view of the fastening unit 10 according to an embodiment of the present invention. As shown in FIG. 2 (a) It shows the process when the fastening unit is inserted into the rim.

Referring to Fig. 2, as compared with the fastening unit in which the side surface is inclined as shown in Fig. 2 (b), the fastening unit having no inclination on the side portion as shown in Fig. 2 (a) It can be seen that many deformations appear in the fastening unit.

In other words, in order to insert the fastening unit into the rim, it can be confirmed that the fastening unit having no inclination on the side portion has to be bent much more than the fastening unit having the side inclination. This means that, in inserting the fastening unit into the rim, more force must be applied to the fastening unit having no inclination at the side portion than the fastening unit having the inclination at the side portion, Meaning that no fastening unit should have greater flexibility. Therefore, in the case of inserting the fastening unit into the rim, the fastening unit having no inclination on the side portion requires a relatively large force as compared with the fastening unit having the inclined side face, and has a drawback that the manufacturing conditions are difficult. If the fastening unit has considerable flexibility, the fastening unit can be easily inserted into the rim. However, since the fastening unit can be easily detached after insertion, there is a problem that the safety is poor.

Therefore, the fastening unit 10 according to one embodiment of the present invention has the first side portions 13a, 14a and the upper side 11 (11a, 14b) because the fastening unit having the angle formed by the side surface portion and the upper surface is 90 degrees or more, ) is the angle θ _a is 0˚ <θ _a <satisfies 90˚, and the first side surface (13a, 14a) and the top surface 11 is the angle θ _a and the second side surface (13b, 14b) and the top (11 ) the forming can be easily inserted into the stand fastening unit 10. If, incurring a large force by the angle θ _b provide a fastening unit, which satisfies the relationship of θ _a> θ _b to the rim, because it requires a certain flexibility There is an advantage that it is easy to manufacture.

In addition, the fastening unit 10 according to one embodiment of the present invention has a predetermined flexibility so that the fastening unit can be easily inserted into the rim, but the fastening unit can not be easily detached from the rim when the insertion is completed, There is an advantage that can be made. A more detailed description follows.

Referring to Figure 1, a fastening unit 10 according to one embodiment of the present invention may be inserted into a rim 20 of a bicycle and includes an intermediate member, a left member 13 extending leftward from the intermediate member, And a right side member 14 extending to the right side. Here, the left member 13 refers to a member formed on the left side surface of the fastening unit 10 on the drawing of Fig. 1, and may be otherwise referred to as a left side surface portion. The right side member 14 refers to a member formed on the right side surface of the fastening unit 10 on the drawing of Fig. 1, and can be referred to as a right side portion. The fastening unit 10 may include an upper surface 11 and a lower surface 12 and the intermediate member may mean at least some of the members corresponding to the upper surface 11 and the lower surface 12. [ The intermediate member, the left member 13, and the right member 14 may be made of the same material, but are not limited thereto.

The left member 13 includes a first side surface portion 13a and a second side surface portion 13b and the right side member 14 may include a first side surface portion 14a and a second side surface portion 14b. The second side portions 13b and 14b are formed on the hooks of the rim 2 so that the fastening unit 10 is easily inserted into the rim 20 in the progressing state of the fastening unit 10 with respect to the rim 20 21a, 21b, respectively. Here, for example, the second side portions 13b and 14b are described as including a sliding region, but the present invention is not limited thereto. The first side portions 13a and 14a may also include a sliding region.

When the fastening unit 10 is completely inserted into the rim 20, at least a part of the upper surface 11 of the fastening unit 10 is brought into contact with the bottom surface of the hooks 21a and 21b, It can be prevented from being detached from the rim 20. In order for the fastening unit 10 to be easily inserted into the rim 20 through sliding, the minimum length 1 between the side members 13 and 14 of the fastening unit 10, that is, The length of the fastening unit 10 must satisfy the conditions to be described later and the fastening unit 10 inserted into the rim 20 is prevented from being detached from the rim 20 due to an impact such as a stomach, (L) must satisfy another condition to be described later, and a description thereof will be described later in more detail.

In a state in which the fastening unit is completely inserted into the rim, the upper surface 11 contacts the underside of the hooks 21a and 21b of the rim 20 to prevent the fastening unit from being separated from the rim. Accordingly, the upper surface 11 may be a surface including a part contacting the bottom surface of the hooks 21a and 21b in a combined state of the rim and the tire. An additional member may be formed on the upper surface 11 to increase the coupling force between the rim and the tire.

On the other hand, the shape of the fastening unit 10 shown in FIG. 1 is only one embodiment for facilitating understanding of the present invention, but is not limited thereto. In other words, the shape of the left member 13 and the right member 14 can be variously formed, and accordingly, the maximum length of the fastening unit 10 according to one embodiment of the present invention, The maximum height to the maximum height can be determined according to each shape.

The maximum length of the fastening unit 10 is such that at least a portion of the first side portion 13a of the left member 13 is in surface contact with the left side rim flange inner wall and at least a portion of the first side portion 14a of the right member 14 It may be longer than the distance between the inner flanks of the rim flanges so that elastic bending deformation occurs in the fastening unit 10 in the state in which the inner flange is in the surface contact with the inner flange inner rim of the right flange. That is, the maximum length L of the fastening unit 10 may be greater than the distance 'L _R + 2P' between the rim flange inner walls. Here, L _R represents the length between the two hooks 21a and 21b of the rim 20, and P represents the maximum length of the hook protruding from the flange inner wall.

As described above, at least a part of each of the first side portions 13a and 14b of the side members 13 and 14 of the fastening unit 10 satisfies the condition of L> L _R + 2P ' The fastening unit 10 can be in surface contact with the flange inner wall of the rim 20 in a state where the fastening unit 10 is completely inserted into the rim 20.

In other words, when the fastening unit 10 satisfies the condition of L> L _R + 2P, the first side surface of the fastening unit 10 in the inserted state of the fastening unit 10 with respect to the rim 20, At least a portion of the flanges 13a and 14a may have a predetermined clamping force (or binding force) against the flange inner wall due to friction between the flange inner walls of the rim 20. That is, the flange of the fastening unit 10, the maximum length (L) is a rim (20) both hooks, each rim 20 (21a, 21b) the length (L _R), the hook (21a, 21b) on both sides in between of the The fastening unit 10 can have a predetermined clamping force in the rim 20 by setting the maximum value of the maximum length (i.e., 2P) protruding from the inner wall.

The first side face portion 13a of the left member 13 or the first side face portion 14a of the right side member 14 is elastically deformed by the elastic bending restoring force acting on the flange inner wall of the rim 20, As shown in FIG. At this time, due to the elastic bending restoring force, at least a part of the first side portions 13a, 14a of the fastening unit 10 is in surface contact with the flange inner wall of the rim 20, so that the fastening unit 10, Since the fastening unit 10 is not shaken in the rim 20 due to the fixing force, the noise generated by the fastening unit 10 when the bicycle rides can be effectively Can be reduced. In addition, the bending elastic modulus E _bend of the fastening unit 10 according to an embodiment of the present invention may include a value of 140 MPa or more and 7600 MPa or less, and a description thereof will be described later in more detail.

On the other hand, when the fastening unit 10 is completely inserted into the rim 20, a predetermined clearance is required between the outer surface of the lower surface 12 of the fastening unit 10 and the inner surface of the lower surface of the rim 20. This can be more easily understood from FIG.

FIG. 3 is a view showing a state in which there is no clearance space in the rim when the fastening unit 10 according to the embodiment of the present invention is completely inserted into the rim.

3, when the maximum length L of the fastening unit 10 is too long and the fastening unit 10 is inserted into the rim 20, the lower surface of the fastening unit 10 and the rim 20 3, there is a problem that it is difficult to remove the fastening unit 10 from the rim 20 when the fastening unit 10 is to be replaced, for example. When there is no free space in the rim 20 by the fastening unit 10 that has been inserted into the rim 20, there is no tire surrounding the outer surface of the lower surface of the fastening unit 10, It may not be properly coupled to the rim 20. In this case, the tire can be easily separated from the rim 20 even though the fastening unit is inserted into the rim 20. The maximum length L of the fastening unit 10 can satisfy the following condition (1) in order to secure a clearance space in the rim 20 when the fastening unit 10 is inserted into the rim 20.

[Equation 1]

, b=c-(H_R-h), c는 a와 b에 의하여

로 표현될 수 있다. 따라서, 산출된 c의 값을 기반으로 하여, 체결 유닛(10)의 최대 길이 L이 도출될 수 있다. 한편, 수학식 1에서

는 도 3에서 c와 b사이의 각도를 나타낸다.Here, the process of deriving Equation (1) is as follows. 3, L _R denotes the length between the two hooks 21a, 21b of the rim 20 and P denotes the distance from the flange inner wall of the rim 20 to the left hook 21a or the right hook 21b, Is the maximum length of the protrusion. Also, if h is from the top surface 11 of the fastening unit 10, 12 represents the maximum height, H _R to indicate the height of the inner wall of the rim flange (20). Here, the lengths (a, b, c) of the three sides of the triangle indicated by the dotted line in Equation (4)

, b = c- (H _R -h), c is a and b

. &Lt; / RTI &gt; Therefore, based on the calculated value of c, the maximum length L of the fastening unit 10 can be derived. On the other hand, in Equation (1)

Represents the angle between c and b in Fig.

Further, even when the thickness of the fastening unit 10 is too thick, there is no free space in the rim 20 when the fastening unit 10 is inserted into the rim 20, so that the fastening unit 10 according to one embodiment of the present invention The maximum height h (i.e., the maximum thickness) of the substrate 10 can satisfy the following condition. This can be more easily understood from FIG.

FIG. 4 is a view showing a state in which the fastening unit is free from a space in the thickened state when the fastening unit 10 according to the embodiment of the present invention is completely inserted into the rim.

4, when the fastening unit 10 is attached to the rim 20 not only when the maximum length of the fastening unit 10 is too long but also when the maximum height (or the maximum thickness) of the fastening unit 10 is too large, There may be no clearance in the rim 20 when inserted into the rim 20. The lower surface 12 of the fastening unit 10 according to one embodiment of the present invention may be provided in the rim 20 when the fastening unit 10 is inserted into the rim 20. [ Can satisfy the following expression (2). &Quot; (2) &quot;

&Quot; (2) &quot;

Here, L represents the maximum length of the fastening unit 10, L _R represents the length between the two hooks 21a, 21b of the rim 20, P represents the maximum length of the hook protruding from the flange inner wall, h indicates the maximum height from the upper surface 11 to the lower surface 12 of the fastening unit 10 and H _R indicates the height of the flange inner wall of the rim 20.

보다 약간 짧은 것으로 가정(예를 들어, 10% 정도 짧은 것으로 가정)하면, h'의 길이는

로 표현될 수 있다. 이에 기초하여 보면, 본원의 일 구현예에 따른 체결 유닛(10)의 최대 높이 h는 상기 수학식 2의 조건을 만족함에 따라, 체결 유닛(10)이 림(20) 내에 삽입 완료되었을 때 림(20) 내에 여유공간이 확보될 수 있으며, 이를 통해 체결 유닛(10)에 대한 교체가 용이하고, 림(20)에 대한 타이어의 고정력을 높일 수 있다.4, the height h from the upper surface 11 to the lower surface 12 of the fastening unit 10 corresponds to h 'at the height H _R of the flange inner wall of the rim 20 Minus the length of the length. 4, the length of c is equal to the length of the upper surface 11 of the fastening unit 10 (i.e., the length of the upper surface 11 where the fastening unit is curved in a state in which the fastening unit is completely inserted into the rim) Half of

(Assuming, for example, that it is as short as 10%), the length of h '

. &Lt; / RTI &gt; The maximum height h of the fastening unit 10 according to an embodiment of the present invention satisfies the condition of Equation 2 so that when the fastening unit 10 is completely inserted into the rim 20, 20, the clearance can be secured in the fastening unit 10, and the fixing force of the tire to the rim 20 can be increased.

The fastening unit 10 according to one embodiment of the present application is configured to be easily inserted into the rim 20 through sliding and to be easily detached from the rim 20 after insertion into the rim 20, The conditions to be satisfied can be satisfied. A more detailed description follows.

5 is a view for explaining conditions for preventing the engaging unit 10 from being disengaged from the rim 20 after being inserted into the rim 20 according to an embodiment of the present invention.

5, in order to prevent the fastening unit 10 from being disengaged from the rim 20 due to an external impact such that the fastening unit 10 is completely inserted into the rim 20, ) Can satisfy the following equation (3).

&Quot; (3) &quot;

Here, L represents the maximum length of the fastening unit 10, and L _R represents the length between the two hooks 21a and 21b of the rim 20. Further, P denotes the maximum length of the hook is projected from the inner wall of the flange, R is if from the upper surface 11 of the hook of thickness 1/2, h are entered into the unit 10, it indicates the maximum height of the (12), H _R represents the height of the flange inner wall in the rim 20.

If the maximum length L of the fastening unit 10 does not satisfy the condition of Equation (3) (i.e., when the maximum length L is smaller than the condition of Equation (3)), The fastening unit 10 inserted into the rim 20 by an external force can be easily detached from the rim 20. Therefore, in order to prevent the fastening unit 10 from being easily separated from the rim 20, it is preferable that the maximum length L of the fastening unit 10 satisfies the condition of the above-mentioned formula (3).

6 is a view for explaining a condition for securing a clearance in the rim 20 when the fastening unit 10 according to the embodiment of the present invention is inserted into the rim 20, ) Inserted into the rim 20 is completed.

6, at least a part of the upper surface 11 of the fastening unit 10 is engaged with the hooks 21a and 21b of the rim 20 in a state where the fastening unit 10 is completely inserted into the rim 20 It is possible to prevent the fastening unit 10 from being detached from the rim 20 due to an external impact or the like. Here, in order to secure a clearance in the rim 20 after the fastening unit 10 is inserted into the rim 20, the maximum height of the fastening unit 10 is set to satisfy the following mathematical formula Equation 4 can be satisfied.

&Quot; (4) &quot;

Where h denotes the maximum height from the top surface 11 to the bottom surface 12 of the fastening unit 10 and H _R denotes the height of the flange inner wall of the rim 20.

The maximum height h from the top surface 11 to the bottom surface 12 of the fastening unit 10 may be less than or equal to the height H _R of the flange inner wall have. In this case, when the maximum height of the fastening unit 10 satisfies the condition of the expression (4), it is understood that the case where the fastening unit 10 is not bent in the state that the fastening unit 10 is completely inserted in the rim 20 . However, the fastening unit 10 according to one embodiment of the present invention is provided such that at least a portion of the first side portions 13a, 14a is in surface contact with the flange inner wall of the rim 20 in a state of being inserted into the rim 20 It is preferable that the maximum height of the fastening unit 10 satisfies the condition of the formula (2), considering that a certain warpage may occur in the fastening unit 10 in this case.

7 is a view for explaining a condition for the fastening unit 10 according to one embodiment of the present invention to be inserted into the rim 20 through sliding.

Referring to Figure 7, the fastening unit 10 according to one embodiment of the present invention has a minimum length between the side members 13, 14 for insertion into the rim 20 through sliding, The minimum length between the side surface portion 13b and the right second side surface portion 14b may satisfy the following expression (5).

&Quot; (5) &quot;

Here, l denotes the minimum length between a minimum length, specifically, the second side surface (13b, 14b) of the two sides between the left side member 13 and right member 14 of the fastening unit (10), L _R is the rim ( 20, P represents the maximum length of the hook protruding from the flange inner wall, and R represents 1/2 of the hook thickness. B is a distance between the left side member 13 and the right side member 14 at the maximum height h from the top surface 11 to the bottom surface 12 of the fastening unit 10 and the maximum length L of the fastening unit 10. [ Of the length corresponding to one half of the length obtained by subtracting the minimum length (l) between the two lengths. In other words, b can represent a larger value of the "h" value and the "0.5 * (Ll) (expressed differently (Ll) / 2)" value.

If the minimum length l between the second side portions 13b and 14b of the fastening unit 10 is too long without satisfying the condition of Equation (5), as shown in Fig. 2 (a) It may be difficult to insert the fastening unit 10 into the rim 20, or the insertion itself may become impossible as the rib 10 is excessively bent or requires a large force to be inserted. If the minimum length l is too long, there is a problem that no clearance exists in the rim 20 in a state where the fastening unit 10 is completely inserted into the rim 20. Therefore, the minimum length 1 between the second side portions 13b and 14b of the fastening unit 10 according to an embodiment of the present invention preferably satisfies the condition of Equation (5).

8 is a view for explaining a length of a sliding region of a fastening unit according to an embodiment of the present invention.

 Referring to FIG. 8, the fastening unit 10 according to one embodiment of the present invention may have a shape with both sides 13 and 14 forming a double angle as in the embodiment of FIG. 1, but it is not limited thereto , The fastening unit 10 'according to another embodiment of the present invention may have a curved shape as shown in Fig. For example, when the fastening unit 10 'has the protruding shape of both side members and the upper surface (upper surface) as shown in Fig. 8, the length of the sliding region c is set to be the length of the elliptic curve extending from the uppermost surface to the lower surface of the fastening unit It can mean length.

According to this, the length c of the sliding region in the fastening unit 10, 10 'according to an embodiment of the present invention can satisfy the following expression (6).

&Quot; (6) &quot;

Here,? A represents the length extending in the horizontal direction from the end of the lower surface 12 to the intersection of the uppermost horizontal extending virtual line of the upper surface 11 and the vertically extending imaginary line of one end of the longest portion of the fastening units 10, 10 ' , And Δb can indicate a length extending in the vertical direction from the end of the lower surface 12 to the intersection of the uppermost horizontal extending virtual line of the upper surface 11 and the vertically extending imaginary line of one end of the longest portion of the fastening units 10 and 10 ' have.

As described above, the fastening unit 10 according to one embodiment of the present invention has a shape that satisfies the above-mentioned Equations 1 to 6, so that when the fastening unit 10 is inserted into the rim 20, And can be fastened within the rim 20 so that the fastening unit 10 is not released from the rim 20 after the fastening unit 10 is inserted into the rim 20.

9 is a view showing a simulation result performed on the fastening unit 10 according to the embodiment of the present invention. Specifically, Fig. 9 shows the simulation results depending on whether or not the fastening unit 10 satisfies the conditions of each of the equations (1) to (5) to determine the suitability of the fastening unit 10. Fig. In Fig. 9, θ _a and θ _b are angular units (°), and the remaining variables represent mm units.

9, a simulation result of the fastening unit 10 according to an embodiment of the present invention indicates that the fastening unit 10 does not satisfy at least one of the conditions for the equations (1) to (5) (That is, when any one of the expressions 1 to 5 is X), it is determined that the result of the comprehensive judgment on the suitability determination of the tire as a tightening unit for the rim 20 is X, that is, ) Is found to be unsuitable as a unit for tightening a tire.

On the other hand, when the fastening unit 10 according to the embodiment of the present invention satisfies all the conditions for the expressions (1) to (5), the result of the comprehensive judgment on the suitability determination as the fastening unit for the tire with respect to the rim O, that is, it can be confirmed that the fastening unit 10 is suitable as a tire fastening unit.

Here, the significance of the result of the comprehensive judgment will be briefly described as follows. When the fastening unit 10 does not satisfy the condition of Equation (1) (that is, when Equation 1 is X) It means that there is no space in the rim 20 when the fastening unit 10 is completely inserted into the rim 20 and that the condition of the equation (2) or (4) is not satisfied 2 or the formula 4 is X), when the fastening unit 10 is completely inserted into the rim 20 because the maximum height of the fastening unit 10 is too long (i.e., too thick) It means there is no space. It is to be noted that the fastening unit 10 does not satisfy the condition of the expression (3) (that is, when the formula (3) is X) 20), and that the fastening unit 10 does not satisfy the condition of the equation (5) (that is, when the equation 5 is X), it means that the left side member And the right side member is too long to mean that the fastening unit 10 can not be easily inserted into the rim 20 through sliding.

Thus, the result of the overall determination is O, which means that the fastening unit 10 according to one embodiment of the present invention satisfies all the conditions of Equations (1) to (5) The unit 10 can easily insert the fastening unit 10 into the rim 20 while securing a clearance in the rim 20 in a state where the fastening unit 10 is completely inserted into the rim 20, It can be understood that the fastening unit 10 is suitable as a tire fastening unit.

In addition, the fastening unit 10 according to one embodiment of the present invention is configured such that the top surface 11 of the fastening unit 10 and the first side surfaces 13a, 14a ) angle (θ _a) is between can be formed so as to satisfy the 0˚ <θ _a <90˚. In addition, the first side portion (13a, 14a) and the top surface 11 is the angle θ _a and the second side surface (13b, 14b) and each θ _b the upper surface 11 is forming is to satisfy a relationship of θ _a> θ _b .

10 is a view for explaining physical conditions for the fastening unit 10 according to an embodiment of the present invention.

10, if the fastening unit 10 is too flexible, both ends of the upper surface 11 of the fastening unit 10 can not be supported on the lower surfaces of the two hooks 21a and 21b of the rim, The fastening unit 10 can be easily detached from the rim 20 due to an external impact or the like during movement. Therefore, the fastening unit 10 needs a certain flexibility. Accordingly, the fastening unit 10 according to one embodiment of the present invention is configured such that, in order to prevent the fastening unit 10 from being bent by the load F applied to the fastening unit 10 after the coupling between the rim 20 and the tire, And a flexural modulus (E _bend ) of 140 MPa or more and 7600 MPa or less. That is, the fastening unit 10 according to one embodiment of the present invention can satisfy a physical property condition such that the flexural modulus E _bend includes a value of 140 MPa or more and 7600 MPa or less, in order to prevent the flexure unit 10 from being bent by a load. This can be more easily understood with reference to FIG.

11 is a diagram showing a simulation result on the range of flexural modulus of the fastening unit 10 according to an embodiment of the present invention.

11, a simulation of flexural modulus of the fastening unit 10 according to an embodiment of the present invention shows that if the flexural modulus of the fastening unit 10 is 140 MPa or less, And the bending elastic modulus of the fastening unit 10 is 7600 MPa or more, the fastening unit 10 is not easily bent. For example, when the fastening unit 10 is to be replaced And it was impossible to replace it.

Therefore, as a condition for preventing the fastening unit 10 according to one embodiment of the present invention from being excessively bent or not being bent by the load, the bending elastic modulus of the fastening unit 10 may be set to a value of 140 MPa or more and 7600 MPa or less .

Here, the fastening unit 10 according to one embodiment of the present invention is such that the distance? H between both hooks of the rim 20 is 20 mm, the maximum length L of the fastening unit 10 is 21.5 mm, The flexural modulus under the condition that the width w of the unit 10 is 5 mm and the height h of the fastening unit 10 is 2.5 mm and the load F is 20 kgf is the most preferable.

12 is a schematic cross-sectional view of a tire for a bicycle in which a rim 20 and a tire 30 are coupled by a fastening unit 10 according to an embodiment of the present invention.

12, according to one embodiment of the present invention, there is provided a bicycle tire in which a rim 20 and a tire 30 are coupled by a fastening unit 10 according to an embodiment of the present invention as described above .

At least a part of the first side portions 13a and 14a of both side members 13 and 14 of the fastening unit 10, that is, at least a part of the first side portion 13a of the left member 13 of the fastening unit 10 At least a portion of the first side portion 14a of the right side member 14 of the fastening unit 10 and / or of the fastening unit 10 may be in surface contact with the flange inner wall of the rim 20, 10 may have a predetermined clamping force (cohesive force) within the rim 20.

In addition, the fastening unit 10 according to one embodiment of the present invention may be formed of a material such as nylon, polyethylene (PE), polypropylene (PP), acetal, acrylonitrile butadiene-styrene, poly carbinate (PC), polyacetal, PBT, Fluororesin, and combinations thereof, and each component may be selected from the group consisting of A more detailed description will be omitted.

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

The fastening unit 10 according to one embodiment of the present invention has such a shape as to be easily inserted when inserted into the rim 20 and not to be easily separated from the rim 20 in the state of being completely inserted into the rim 20, A part of the tire 30 covers the outer surface of the lower surface of the fastening unit 10 as it is inserted into the rim 20 so as to secure a clearance in the rim 20 so that the bicycle can be driven more stably .

It will be understood by those of ordinary skill in the art that the foregoing description of the embodiments is for illustrative purposes and that those skilled in the art can easily modify the invention without departing from the spirit or essential characteristics thereof. It is therefore to be understood that the implementations / embodiments described above are illustrative in all aspects and not restrictive. For example, each component described as a single entity may be distributed and implemented, and components described as being distributed may also be implemented in a combined form.

The scope of the present invention is defined by the appended claims rather than the detailed description, and all changes or modifications derived from the meaning and scope of the claims and their equivalents should be construed as being included within the scope of the present invention.

10: fastening unit
11: Top surface
12: When you
13: Left member
14: Right member
13a, 14a:
13b, 14b:
20: rim
21a, 21b: hook
L: Maximum length of fastening unit
L _R : Length between the hooks of the rim
P : maximum length of the hook protruding from the flange inner wall
h : Maximum height from the upper surface to the lower surface of the fastening unit
H _R : Height of flange inner wall
l: the minimum length between the left member and the right member
b : the maximum height from the upper surface to the lower surface of the fastening unit and 0.5 * (the maximum length of the fastening unit - the minimum length between the side portions)
30: Tire

Claims (13)

A fastening unit for fastening a tire to a rim,
Intermediate member;
A left member extending leftward from the intermediate member; And
And a right member extending to the right from the intermediate member,
Wherein the left member and the right member include a first side portion and a second side portion,
Wherein the second side portion includes a sliding region capable of sliding with respect to the hook of the rim so that the fastening unit can be easily inserted into the rim in the insertion progress of the fastening unit with respect to the rim,
Wherein the maximum length of the fastening unit is such that at least a part of the first side surface of the left member is in surface contact with the inner rim flange inner wall of the left member and at least a part of the first side surface of the right member is in surface contact with the inner rim flange inner wall Is longer than the distance between the inner flanks of the rim flanges so as to cause elastic bending deformation in the fastening unit,
Wherein the first side surface portion of the left member or the first side surface portion of the right side member is provided so as to be in surface contact with the inner surface of the rim flange by an elastic bending restoring force exerted by the elastic bending deformation.
The method according to claim 1,
And the maximum length ( L ) of the fastening unit satisfies the following formula (1): &quot; (1) &quot;
[Equation 1]

here,

,

, _R L indicates the maximum height, H, and _R is the height of the inner wall of the flange up to when the length between the rim hook, P is from the upper surface of the maximum length, h are entered into the unit hook is projected from the inner wall of the flange.
The method according to claim 1,
( H ) of the fastening unit from the upper surface to the lower surface satisfies the following formula (2): &quot; (2) &quot;
&Quot; (2) &quot;

Here, L is the maximum of the fastening unit length, L _R is the length between the rim hook, P is the hook is projected from the flange inner wall of the maximum length, h is a maximum height of up to when the upper surface of the engage unit, and H _R is a flange Indicates the height of the inner wall.
The method according to claim 1,
Wherein the fastening unit satisfies the following equations (3) to (5): &quot; (5) &quot;
&Quot; (3) &quot;

Where L is the maximum length of the fastening unit, L _R is the length between the hooks of the rim, P is the maximum length of the hook protruded from the flange inner wall, R is 1/2 of the hook thickness, h is the height And H _R denotes the height of the flange inner wall;
&Quot; (4) &quot;

Where h is the maximum height from the top surface to the bottom surface of the fastening unit and H _R is the height of the flange inner wall;
&Quot; (5) &quot;

Here, l is a left member and a right member between the minimum length, L _R is the length between the rim hook, P is the maximum length of the hook is projected from the inner wall of the flange, R is a hook thickness 1/2, b is a unit of the fastening The maximum height from the upper surface to the lower surface and 0.5 * (the maximum length of the fastening unit - the minimum length between the left member and the right member).
The method according to claim 1,
_Wherein the bending elastic modulus E _bend of the fastening unit comprises a value of 140 MPa or more and 7600 MPa or less.
The method according to claim 1,
(C) of the sliding region satisfies the following equation (6): &quot; (6) &quot;
&Quot; (6) &quot;

Here,? A is the length extending in the horizontal direction from the end of the lower surface to the intersection of the imaginary horizontal extending line at the uppermost portion of the upper surface and the vertically extending imaginary line at one end of the longest portion of the fastening unit, and? B is the length extending from the lower end to the uppermost horizontal extension A virtual line and a length extending in the vertical direction from the one end of the longest portion of the fastening unit to the intersection of the vertically extending imaginary line.
The method according to claim 1,
Wherein the tire comprises a solid tire manufactured by an injection foaming method.
The method according to claim 1,
Wherein the angle? _A formed by the first side surface portion and the upper surface of the fastening unit satisfies 0? <? _A <90 ?.
The method according to claim 1,
Wherein the angle? _A formed by the first side surface portion and the upper surface of the fastening unit, and the angle? _B formed by the second side surface portion and the upper surface of the fastening unit satisfy a relationship of? _A &_gt;
The method according to claim 1,
Wherein the fastening unit comprises a synthetic resin selected from the group consisting of nylon, polyethylene, polypropylene, acetal, acrylonitrile butadiene styrene, polycarbonate, polyacetal, PBT, fluororesin, and combinations thereof. .
The method according to claim 1,
Wherein the intermediate member, the left member, and the right member are made of the same material.
A tire for a bicycle, wherein the rim and the tire are joined by the fastening unit according to claim 1.
13. The method of claim 12,
Wherein at least a portion of the first side portion of the left member of the fastening unit or at least a portion of the first side portion of the right member of the fastening unit is in surface contact with the flange inner wall of the rim.

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