TWM592410U - Bicycle seat tube structure - Google Patents

Abstract

A bicycle seat tube structure. The seat tube includes a hollow outer tube, and an inner circumferential edge of the outer tube is provided with an axially extending first groove. The outer tube is sleeved with an inner tube, and an outer edge of the inner tube is provided A second groove extending axially and corresponding to the first groove, a limiting space formed by the first groove and the second groove is provided with a limiting member, the limiting member includes a body and a pressing By fixing the limiting member between the first groove and the second groove, relative rotation of the inner tube and the outer tube can be avoided, and the material characteristics of the pressing member can eliminate the problems caused by the assembly tolerance gap.

Description

Bicycle seat tube structure

This creation relates to a bicycle seat tube structure, in particular to a bicycle seat tube structure that provides a rotation limit and can fill the matching tolerance problem between components in the limit structure.

In response to the demands of environmental protection, the trend of using bicycles as a means of transportation is prevalent year by year. In order to strengthen the promotion of this trend, counties and cities have also launched public bicycles for public rental. In order to match the height of each rider, bicycle seat tubes generally The function of height adjustment can make the rider have a more comfortable riding experience.

The seat tube connected to the bicycle seat cushion is the most directly related structure that affects the comfort, stability, and safety of the riding. If the height of the seat tube itself is incorrectly adjusted, the shock absorption effect is not good, and the stability is not good, it will affect the riding The posture and muscle exertion of the rider make it more laborious and even cause sports injuries. The height-adjustable seat tube is equipped with a shock absorber function. The inner tube set in the seat tube for height adjustment is likely to rotate due to the linear movement of the reciprocating up and down, causing the seat cushion to sway, affecting the efficiency of the rider pedaling the bicycle. It also affects riding safety, so it is convenient for the industry to provide a rotation limiting structure in the seat tube and the lifting tube, so that the inner tube will not rotate when it moves up and down axially.

As disclosed in the domestic new patent number 104213450, the "rotation device for bicycle seat" connects an anti-rotation rod body to the side of the bicycle seat, and the anti-rotation rod body is It can be put into a seat tube of the vehicle body in a way of restricting the escape; the anti-rotation bar system is integrally formed with a joint for installing a bicycle seat on the top of an air pressure rod, the air pressure rod is provided with a cylinder body and a cylinder body A rod member with a first anti-rotation body extruded and having a non-circular outer contour at a predetermined part of the cylinder, and an end cover is provided between the joint and the first anti-rotation body, and A dust cover is sleeved between the end cover and the cylinder body.

As mentioned above, since the rotation limiting device is mostly provided between the seat tube and the inner tube, in order to be easier and easier to assemble, there will be a slight tolerance gap between the components, and the seat tube and the inner tube move linearly for a long time Under wear, the gap between the seat tube and the inner tube and the related components of the rotation limit is likely to produce gaps. Such gaps set by assembly tolerances or gaps caused by long-term wear will cause the seat tube. Shaking occurs when moving linearly with the inner tube, resulting in inaccurate lifting adjustments, poor pedaling efficiency, and impact on safety.

Therefore, how to eliminate the gaps generated by the connecting parts of the rotation-limiting related components is the problem that this creation is eager to solve.

Therefore, the main purpose of this work is to provide a solution to the problem of rotation and shaking caused by the adjustable bicycle seat tube and the inefficiency of the limit structure due to assembly tolerances.

To achieve the above purpose, this creation relates to a bicycle seat tube structure, which includes: an outer tube with at least one first groove extending axially on the inner periphery of the outer tube; an inner tube sleeved on the The outer tube can move axially relative to the outer tube. The outer periphery of the inner tube is provided with at least one second groove extending axially; at least one limiting member, including a body and a pressing member; a driving structure, The driving structure is arranged inside the outer tube and between the inner tube to drive the inner tube phase Switching between the axial movement state and the positioning state of the outer tube; wherein, the first groove and the second groove are disposed oppositely, and the limiting member is accommodated in the first groove and the second groove to form together In a limited space.

The length of the first groove extends along the axial length of the inner periphery of the outer tube.

The length of the first groove extends along the axial length of the inner periphery of the outer tube.

The length of the second groove is matched with the length of the limiting member, and the limiting member is accommodated in the second groove.

The body of the limiting member is made of metal material.

The pressing member of the limiting member is made of elastic material.

The pressing member of the limiting member wraps at least a part of the body.

The body has a first diameter section and a second diameter section, the first diameter length of the first diameter section is smaller than the second diameter length of the second diameter section.

Wherein the pressing member of the limiting member is wrapped at the first diameter section of the body, so that the third diameter formed by combining the body and the pressing member is greater than or equal to the second diameter of the second diameter section length.

In this way, the advantage of the present invention is that the first groove and the second groove accommodate the limiter, which can generate a rotation limit, to avoid the unstable structure of the seat tube due to height adjustment, and to produce rotational shaking. The pressing member on the limiting member can use the characteristics of the elastic material to effectively fill the gap between the first groove, the limiting member and the second groove due to the assembly tolerance, so that the bicycle can ride during the ride The person can be more comfortable, and the pedaling is more labor-saving and efficient.

100‧‧‧ Seatpost

110‧‧‧Outer tube

111‧‧‧The first groove

120‧‧‧Inner tube

121‧‧‧Second groove

121a‧‧‧The first end

121b‧‧‧Second end

130‧‧‧Drive structure

131‧‧‧actuator

132‧‧‧Drive wheel

133‧‧‧Control line

200‧‧‧Limiting parts

210‧‧‧Limit space

201‧‧‧Body

201a‧‧‧The first diameter section

201b‧‧‧The second diameter section

202‧‧‧ Urgent

R1‧‧‧First diameter

R2‧‧‧Second diameter

R3‧‧‧The third diameter

Figure 1 is a perspective view of a bicycle seat tube structure.

Figure 2 is an exploded view of the bicycle seat tube structure.

FIG. 3A is a schematic diagram of creating a limiting member for a bicycle seat tube structure.

FIG. 3B is a cross-sectional view of a limit member for a bicycle seat tube structure.

FIG. 4 is a schematic diagram of an implementation of creating a limiting member for a bicycle seat tube structure.

FIG. 5 is an implementation cross-sectional view 1 of a bicycle seat tube structure limiter.

FIG. 6 is a second sectional view of the implementation of the limiting member of the bicycle seat tube structure.

The detailed content and technical description of this creation are now further explained with examples, but it should be understood that these examples are for illustrative purposes only and should not be construed as limitations on the implementation of the creation.

Please refer to Figure 1 to Figure 6. This creation relates to a bicycle seat tube 100. The seat tube 100 includes an outer tube 110, an inner tube 120, and a driving structure 130. The inner tube 120 is movably disposed in the outer tube 110. The outer tube 110 and a bicycle The frame (not shown) is fixed, the driving structure 130 is connected to the outer tube 110, and the driving structure 130 is connected to a bicycle control device (not shown). When the user controls the bicycle control device to adjust the driving structure 130, the driving structure 130 controls the axial movement of the inner tube 120 relative to the outer tube 110 to achieve the purpose of adjusting the height of the seat tube.

In order to prevent the inner tube 120 of the seat tube 100 and the outer tube 110 from moving relative to each other when the axial movement occurs, the seat tube 100 passes through at least one first groove 111 provided in the outer tube 110 and at least one second recess provided in the inner tube 120 The groove 121 and at least one limiting member 200 form a limiting structure. The first groove 111 is provided in the outer tube The inner periphery of 110 extends axially along the inner periphery of the outer tube 110. The second groove 121 is disposed on the outer periphery of the inner tube 120 and extends axially along the outer periphery of the inner tube 120 and is corresponding to the first groove 111. The limiting member 200 is accommodated in a limiting space 210 formed by the first groove 111 and the second groove 121.

The limiting member 200 has a rod shape, and includes a body 201 and a pressing member 202. The body 201 may be made of a metal material, the pressing member 202 may be made of an elastic material, and the pressing member 202 is wrapped around the body 201. Wherein, the body 201 can be made of copper, aluminum, stainless steel or other metal alloys, and the pressing member 202 can be made of rubber, urethane or other elastic composite materials. More specifically, please refer to FIG. 3A and FIG. 3B, the body 201 includes a first diameter section 201a and a second diameter section 201b, the length of the first diameter R1 of the first diameter section 201a is smaller than the second diameter R2 of the second diameter section 201b The length of the pressing member 202 is wrapped around the first diameter section 201a, so that the length of the third diameter R3 formed by the combination of the limiting member 200 and the pressing member 202 is greater than or equal to the length of the second diameter R2 of the second diameter section 201b.

In this embodiment, the limiting structure includes three limiting members 200, so the first groove 111 and the second groove 121 for accommodating the limiting member 200 also have three sets each. The length of the first groove 111 extends along the length of the inner periphery of the outer tube 110, and can be integrally formed with the outer tube 110; the length of the second groove 121 matches the length of the stopper 200, and the second groove 121 and the inner tube 120 is integrally formed; a part of the limiting member 200 is accommodated in the first groove 111, and the other part is accommodated in the second groove 121. In more detail, the second groove 121 has a first end 121a and a second end 121b, and the limiting member 200 can selectively abut the first end 121a or the second end 121b of the second groove 121. When the inner tube 120 is pushed upward by the driving structure 130 and moves axially, the limiting member 200 abuts against the second end 121b of the second groove 121b, and moves upward with the inner tube 120 in the first groove 111 Axial movement; when the inner tube 120 moves axially downward, the limiting member 200 abuts the first end 121a of the second groove 121 and is in the first groove 111 As the inner tube 120 moves downward axially. Wherein, since the limiting member 200 is covered with an elastic pressing member 202, the pressing member 202 can assist the limiting member 200 to fill the gap between the first groove 111 and the second groove 121 to prevent the inner tube 110 Rotates relative to the outer tube 120.

The driving structure 130 includes an actuating device 131 and a driving wheel 132. One end of the driving wheel 132 is connected to the actuating device 131, and the other end is connected to a bicycle control device (not shown) by a control line 133. The actuating device 131 is provided at The outer tube 110 is partially disposed in the inner tube 120. In this embodiment, the actuating device 131 can be a pneumatic, hydraulic or hybrid fluid control device to change the fluid pressure between the inner tube 120 and the outer tube 110 to move the inner tube 120 axially relative to the outer tube 110 .

When the height of the bicycle seat cushion needs to be adjusted, the driving wheel 132 can be driven to rotate by operating the bicycle control device to pull the control wire 133. The driving wheel 132 pushes the actuator device 131, and the actuator device 131 drives the inner tube 120 to move axially. During the axial movement, the limiting member 200 moves with the inner tube 120 in the limiting space 210 formed by the first groove 111 and the second groove 121, which can assist the positioning of the inner tube 120 and avoid the outer tube 110 Relative to the rotation of the inner tube 120, the limit function is achieved. In addition, due to the characteristics of the elastic material, the pressing member 202 provided on the limiting member 200 can fill the gap between the limiting member 200 and the limiting space 210 due to tolerances during assembly, which can effectively prevent rotation and achieve more Good limit effect.

This creation has been disclosed in the above with preferred embodiments. However, those skilled in the art should understand that this embodiment is only for depicting this creation, and should not be interpreted as limiting the scope of this creation. It should be noted that all changes and replacements equivalent to this embodiment should be included in the scope of this creation. Therefore, the scope of protection of this creation shall be as defined in the scope of patent application below.

100‧‧‧ seat tube structure

110‧‧‧Outer tube

120‧‧‧Inner tube

200‧‧‧Limiting parts

130‧‧‧Drive structure

131‧‧‧actuator

132‧‧‧Drive wheel

133‧‧‧Control line

Claims (8)

A bicycle seat tube structure, including: An outer tube with at least one first groove extending axially on the inner periphery of the outer tube; An inner tube, sleeved on the outer tube, which can move axially relative to the outer tube, and an outer periphery of the inner tube is provided with at least one second groove extending axially; At least one limit piece, including a body and a pressing piece; A driving structure, which is arranged inside the outer tube and penetrated between the inner tube, and is used to drive the switching between the axial movement state and the positioning state of the inner tube relative to the outer tube; Wherein, the first groove and the second groove are arranged oppositely, and the limiting member is accommodated in a limiting space formed by the first groove and the second groove. The bicycle seat tube structure as described in item 1 of the patent application range, wherein the length of the first groove extends along the axial length of the inner periphery of the outer tube. The bicycle seat tube structure as described in item 1 of the patent application scope, wherein the length of the second groove matches the length of the limiting member, and the limiting member is accommodated in the second groove. The bicycle seat tube structure as described in item 1 of the patent application scope, wherein the body of the limiting member is made of a metal material. The bicycle seat tube structure as described in item 1 of the patent application scope, wherein the pressing member of the limiting member is made of an elastic material. The bicycle seat tube structure as described in item 1 of the patent application range, wherein the pressing member of the limiting member wraps at least a part of the body. The bicycle seat tube structure as described in item 6 of the patent application scope, wherein the body has a first diameter section and a second diameter section, the first diameter length of the first diameter section is smaller than the second diameter section of the second diameter section Diameter length. The bicycle seat tube structure as described in item 7 of the patent application scope, in which the pressing of the stopper The member is wrapped at the first diameter section of the body, so that the third diameter length formed by combining the body and the pressing member is greater than or equal to the second diameter length of the second diameter section.

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