JPH0349108Y2 - - Google Patents

Description

[Detailed explanation of the idea] (Industrial application field) The present invention relates to an improvement of a bicycle saddle.

(Prior Art) A conventional bicycle saddle consists of a metal saddle seat formed into a predetermined shape by sheet metal processing, and a metal seat post connected to the center of the bottom of the saddle seat via a connecting fitting. After the lower end of the seat post is inserted into the vertical pipe of the bicycle body, the seat post is fastened to the vertical pipe using a fastener provided on the vertical pipe.

According to the above-mentioned conventional saddle, since the seat post and the vertical pipe are both made of metal, when they are fastened in the vertical pipe, a large frictional resistance acts between them, causing the seat post to move inside the vertical pipe. It does not turn sideways or fall unexpectedly and has sufficient rigidity, which is advantageous in terms of strength. Since it has to be joined through manufacturing processes such as the above, it is difficult to mass produce and is expensive, and since it is made of metal, it is heavy and has the problem of rust, which poses various problems in use.

Therefore, it is conceivable to integrally mold the saddle seat and the seat post from synthetic resin.

(Problems to be solved by the invention) As mentioned above, if the saddle is molded from synthetic resin, it is possible to mass-produce lightweight saddles with the desired shape, and since the seat post will not rust, it will not get stuck or look aesthetically pleasing. There's nothing to lose.
However, since there is little frictional resistance between the synthetic resin seat post and the metal stand pipe, there is a risk that the seat post may unexpectedly rotate or fall within the stand pipe when the bicycle is used. Further, the synthetic resin seat post is easily bent and may be deformed by fastening with a fastener.

In view of the above conventional problems, the present invention makes it possible to mass-produce lightweight saddles with desired shapes, and
To provide a bicycle saddle in which there is no risk of a saddle seat rotating laterally or falling when the bicycle is used, the beauty of the seat post is not impaired, and the strength of the seat post is high.

(Means for Solving the Problems) In order to achieve the above object, the first invention is such that the lower end of the seat post 4 hanging down from the saddle seat 3 is inserted into the vertical pipe 2 of the bicycle body, and the vertical pipe is inserted into the vertical pipe 2 of the bicycle body. In a bicycle saddle in which the seat post 4 is fastened to the vertical pipe 2 by a fastener 7 provided in the seat post 2, the saddle seat 3 and the seat post 4 are integrally molded from synthetic resin, and the seat post 4 is made of synthetic resin. A metal split sleeve 6 that cannot rotate relative to the post 4 but is movable up and down relative to the post 4 is fitted on the outer circumferential side, and the seat post 4 is connected to the upright position via the split sleeve 6. It adopts a configuration in which it is fitted into the pipe 2.

A second invention employs a configuration in which a metal reinforcing pipe 12 is press-fitted into the seat post 4 in the configuration of the first invention.

(Embodiment) Fig. 1 shows a child's bicycle saddle 1, which is an embodiment of the present invention, attached to a vertical pipe 2 of the bicycle body, and the saddle seat 3 and seat post 4 of the saddle 1 are made of hard synthetic resin. It is integrally molded. Therefore, saddle seats 3 and seat posts 4 having desired shapes can be mass-produced at low cost, and can be significantly lighter than conventional metal ones. Moreover, since the seat post 4 does not rust, it does not spoil its aesthetic appearance, and moreover, the seat post 4 can be colored in a desired color to make it colorful.

As shown in FIG. 2, an engagement groove 5 having a rectangular cross section is formed along the longitudinal direction of the outer circumferential surface of the seat post 4 over the entire length of the seat post 4. A cylindrical split sleeve 6 made of metal and slightly elongated vertically is fitted onto the outer peripheral side of the seat post 4. The split sleeve 6 is
As shown in FIG. 2, and particularly in FIG. 4, a protrusion 6a protruding inwardly is formed on the entire longitudinal side surface by bending, and a slightly wider split slit 6b is formed on the opposite side of the protrusion 6a. As a result, the split sleeve 6 can be elastically deformed in the radial direction, and the amount of elastic deformation is absorbed by the split slit 6b. When fitting the split sleeve 6 to the seat post 4, the sleeve 6
The protruding portion 6a of the seat post 4 is adapted to engage with the engagement groove 5 of the seat post 4, so that the split sleeve 6 can freely slide up and down along the seat post 4. The seat post 4 cannot rotate in the circumferential direction.

The upper end of the split sleeve 6 is bent outward to form a flange 6c, and when the split sleeve 6 is inserted into the vertical pipe 2 as shown in FIG. hits the upper surface of the vertical pipe 2, and the split sleeve 6 is prevented from entering the vertical pipe 2 any further. Therefore, when the fastener 7 provided on the vertical pipe 2 is released from the state shown in FIG. 1 and the saddle seat 3 is pushed down, only the seat post 4 is pushed into the vertical pipe 2, and conversely, When the saddle seat 3 is pulled up from the state shown in the figure, the split sleeve 6 and the vertical pipe 2 are both made of metal, and the frictional resistance between them is large, but between the split sleeve 6 and the seat post 4. , the former is made of metal and the latter is made of synthetic resin,
Since the frictional resistance between the two is small and the split sleeve 6 is in elastic contact with the inner wall of the vertical pipe 2 due to its elasticity, only the seat post 4 is pulled up and the split sleeve 6 is left in the vertical pipe 2. Furthermore, as shown in FIG. 3, by operating the operating handle 8 of the fastener 7, the cap nut 9, the bolt 10 screwed thereto, and the fastening frame 11 contracted by the cap nut 9 are erected. By tightening the pipe 2, the split sleeve 6 inside the vertical pipe 2 is elastically deformed and the seat post 4 can be firmly fastened.

The seat post 4 can be made to have sufficient strength by selecting the material and wall thickness, but in the embodiment of the present invention, a metal reinforcing pipe 12 is provided inside the seat post 4 over almost its entire length. This provides sufficient rigidity to the seat post 4 and prevents the seat post 4 from bending due to external forces such as the user's weight. In particular, as shown in FIG.
The joint between the seat post 4 and the seat post 4 is reinforced to prevent the joint from breaking due to concentrated loads due to compression and tensile moments.

(Effect of the invention) According to the first invention, since the metal split sleeve is non-rotatably fitted on the seat post, when the seat post is fastened to the vertical pipe of the bicycle body via the split sleeve, , a large metal-to-metal frictional resistance occurs between the split sleeve and the vertical pipe, and even though the seat post is made of synthetic resin, the seat post is firmly connected to the vertical pipe via the split sleeve. When using a bicycle, the saddle seat may unexpectedly turn laterally,
There is no risk of it falling.

In addition, the split sleeve is able to move up and down relative to the seat post, and there is little frictional resistance between the two due to the relationship between the metal and the synthetic resin.
The seat post can be smoothly raised and lowered in the unfastened state, and the height of the saddle seat can be easily adjusted.

Furthermore, since the saddle seat and seat post are integrally molded from synthetic resin, it is possible to mass-produce lightweight and inexpensive saddles that meet the needs of users, and the seat post does not rust, making it aesthetically pleasing. There is no harm to it.

According to the second invention, in the seat post,
Because the metal reinforcing pipe is press-fitted, the seat post is given sufficient rigidity, and the seat post does not bend under the weight of the bicycle user, making the bicycle ride comfortable and stable. I take it as a thing. In addition, the joint between the saddle seat and seat post, which is subjected to concentrated loads, is reinforced to prevent the joint from breaking, eliminating the drawbacks of weak synthetic resin saddles and significantly extending their lifespan. succeeded in extending it to

[Brief explanation of drawings]

Figure 1 is a partially cutaway side view of a bicycle saddle according to an embodiment of the present invention attached to the vertical pipe of the bicycle body, and Figure 2 is a partially cutaway side view of a bicycle seat with a split sleeve fitted onto the seat post. FIG. 3 is a cutaway perspective view, FIG. 3 is a view taken along the - arrow in FIG. 1, and FIG. 4 is an exploded perspective view of the state shown in FIG. 1... Saddle, 2... Vertical pipe, 3... Saddle seat, 4... Seat post, 5... Engagement groove, 6
... Split sleeve, 6a... Engaging protrusion, 7... Fastener, 12... Reinforcement pipe.

Claims (1)

[Scope of claim for utility model registration] 1. The lower end of the seat post hanging down from the saddle seat is inserted into the vertical pipe of the bicycle body,
In a bicycle saddle whose seat post is fastened to the upright pipe by a fastener provided on the upright pipe, the saddle seat and the seat post are integrally molded from synthetic resin, and on the outer circumferential side of the seat post, A metal split sleeve that cannot rotate relative to the post but is movable up and down relative to the post is fitted, and the seat post is fitted into the vertical pipe via the split sleeve. bicycle saddle. 2. The bicycle saddle according to claim 1, wherein a metal reinforcing pipe is press-fitted into the seat post.