JPH0123907Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a protection device that protects the front end of a bicycle frame from being hit by a front fork.

Conventionally, in the type of forehawk in which the upper half of the forehawk leg is held by upper and lower shoulder plates disposed at the upper and lower ends of the head pipe, the upper half of the forehawk leg is held at the maximum turning angle of the frame. It abutted against both sides of the front end, damaging the beautiful coating on the outer peripheral surfaces of both sides, which was not only unsightly, but also caused dents due to the impact of the abutment, which caused problems in terms of strength.

Therefore, this invention was made to solve these drawbacks with a simple structure and an attractive appearance.

Hereinafter, an embodiment of this invention will be explained with reference to the drawings. 1 is a head pipe in a bicycle frame;
2 is an upper pipe formed into a vertically long ellipse with a width narrower than a vertical width. Reference numeral 3 denotes a lower pipe, which is formed into a circular pipe having a diameter equal to the vertical width of the upper pipe.

A protective pad 4 is wrapped around the front end of the lower pipe 3 at a portion corresponding to the abutting portions of the upper halves of the hawk legs 6, 6 of the front hawk 5. Fixation to the lower pipe is achieved by the adhesive force of the double-sided adhesive tape 7 attached to the back surface.

The protective pad 4 may have a concavo-convex pattern 8 attached to the surface of the band-like plate as shown in the figure, and may have a structure that increases its elasticity, or may be constructed entirely of a sponge material. Further, its attachment is not limited to the pressure-sensitive adhesive tape 7, and any attachment method can be used.

Since this device is constructed as described above, when the handle is rotated and the front fork is rotated, the upper half of the front fork foot comes into contact with the front end of the frame; Since the protective pad is attached, the outer surface of the front fork leg does not hit directly, but always hits through the protective pad. Therefore, the impact is dissipated by the cushioning effect of the protective pad, and the outer surface of the frame is dented. Of course, creating a department,
It protects the paint without damaging it or making contact noise. Also, since the side width of the lower pipe is wider than the side width of the upper pipe, even if the pad is relatively thin, there is no risk of it hitting the upper pipe.Moreover, the pad is attached to one of the front ends of the lower pipe. Since it is sufficient to install only the frame, the structure is simple and low cost, and it also serves as an accent to the coloring of the front of the frame, boldly emphasizing the heavy-duty feel of this type of trial bicycle. .

[Brief explanation of drawings]

The drawings show an embodiment of this invented device, and FIG. 1 is a side view, FIG. 2 is a plan view for explaining the operation, and FIG.
The figure is an enlarged plan view of the protective pad, and Figure 4 is the
1A-A cross-sectional view, Figure 5 is also B-B
6 is a sectional view taken along the line CC in FIG. 3. 1...Head pipe, 2...Upper pipe, 3...
Lower pipe, 4...Protective pad, 5...Front hawk,
6,6...Front Hawk foot, 7...Adhesive tape, 8...
...Uneven pattern.

Claims (1)

[Scope of utility model registration request] In a bicycle frame, the upper pipe connected to the head pipe has a vertically elongated cross section, the lower pipe has a wider side than the upper pipe, and the front end of the lower pipe connected to the head pipe has an appropriate shape on its outer periphery. A front fork hit protection device for a bicycle frame, characterized in that a wide and thick protective pad is attached, and the upper half corresponding part of the front fork leg comes into contact with the pad.