JP2008058284A - Pneumatic indicating device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pneumatic indicating device from the outside, from which the pressure inside a tire can be readily found out. <P>SOLUTION: The pneumatic indicating device has a deformable cavity, mounted in the tire so that the cavity section is deformed in shape due to the pressure inside the tire. The cavity section is provided with a window from the outside, from which inside of the cavity can be seen so that its deformation state can be displayed on the window. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a tire pressure display.

  Maintaining a constant air pressure in the tires of automobiles and bicycles is important for safety, but frequent measurement is troublesome and a method that can be easily measured is required.

  Conventionally, there are various types of pressure measuring devices that electrically convert pressure fluctuations into signals and issue an alarm when there is an abnormality, and those that attach a pneumatic indicator to a tire valve. (For example, refer to Patent Document 1).

  JP 08-326955 A

  However, electrical measurement using a pressure measuring instrument becomes a large scale, and it is considered impossible to use it for ordinary automobiles and bicycles in terms of economy. In addition, attaching the pressure indicator directly to the valve is complicated in structure and may cause problems in actual use.

  The present invention is intended to solve such a conventional problem, and can be attached to the rim by simple processing, and automatically displays the pressure fluctuation in response to the pressure inside the tire. . It is another object of the present invention to provide a device that can display pressure by color and can easily determine an abnormality in air pressure by visual observation.

  According to the present invention, it is possible to visually determine the pressure in the tire without touching the tire, and when using an automobile or the like at all times, it is possible to confirm an abnormality in air pressure before riding.

  The pressure display device of the present invention is provided as 2 inside the rim 1 of the tire as shown in FIG.

  As shown in FIG. 2, a transparent window 3 is provided at the center of the protrusion 2 protruding from the rim, and an abnormality in the tire pressure is indicated by a change inside the window.

  As shown in FIG. 3, the protrusion 2 is inserted into a hole provided in the rim 1, and a cavity 4 is provided inside, and is sealed by fitting a transparent plate 3 </ b> A into the upper part of the cavity. A space is constructed. The space is filled with dyed liquid.

  Further, the inside of the projection is in close contact with the rim, and is securely joined with an adhesive or the like, and the inside and outside of the rim are completely blocked by the projection. Even if pressure is generated on the inner surface of the tire, the protrusions are pressed against the rim, so that the adhesion is further improved.

  As shown in FIG. 4, when pressure is applied to the tire, the protrusions are deformed by the pressure from the back surface, and the cavity does not have a gap with the transparent plate. Therefore, the transparent plate and the inside of the cavity are in close contact.

  Therefore, at this time, as shown in FIG. 5, the color of the inner wall of the hollow portion of the window of the display portion can be seen from the outside.

  When the pressure in the tire decreases, the pressure applied to the back surface of the protrusion decreases. At this time, the protrusion returns to the initial shape as shown in FIG. At this time, the sealed liquid is filled between the inner wall and the transparent plate.

  At this time, the color of the internal coloring liquid appears on the transparent plate of the pressure display section as shown in FIG. If the color of the enclosed liquid is made conspicuous, the pressure drop can be confirmed through the transparent plate.

  On the contrary, the color of the inner wall in FIG. 6 is used as a color indicating safety, and it is also possible to warn when the pressure in the tire is lowered by preventing the color from being seen when the pressure is lowered by the coloring liquid.

  It is also possible to display the pressure with the color of the inner wall by not deforming the liquid in the hollow portion of the protrusion, but only by deforming the protrusion.

  According to the present invention, it is possible to easily determine the appropriateness of air pressure visually without touching the tire. It can run with insufficient air pressure and avoid dangers and punctures.

It is the external appearance in the tire of the pressure display apparatus part regarding this invention. It is the external appearance of a pressure display part. It is the figure which illustrated the pressure display apparatus in cross section. It is a figure showing the internal state at the time of normal pressure action. It is a figure of the display part at the time of normal pressure action. It is a figure showing the internal state when a pressure falls. It is a figure of a display part when a pressure falls.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Rim 2 ... Pressure display apparatus 3 ... Transparent window 4 ... Cavity

Claims (1)

A pressure display device having a window in which a hole is formed in a tire rim and a pressure display body having a hollow portion that is deformed by pressure is attached so that a change in tire air pressure can be directly displayed by deformation of the hollow portion.

Images