JP3526568B1 - Tire pressure reduction warning adapter - Google Patents

Abstract

An object of the present invention is to provide a single-wheel or double-wheel tire pressure reduction warning adapter that allows the user to easily check the reduced state of tire pressure and contribute to traffic safety. SOLUTION: A head 32 of an airtight outer frame body 21 is formed of a transparent material, and a colored display body 32 in which the reduced state of the tire air pressure is visually recognized can be viewed from the head inside the outer frame body. And an airtight bellows member 27 for introducing the pressurized air in the tire into the outer frame body, and a mirror body 29 for displaying a display body is mounted on the upper surface of the bellows member, and with the reduction of the tire air pressure, When the air pressure in the bellows member is reduced, the bellows member is contracted, and a pressing spring 30 that causes the display body immersed in the mirror body to emerge from the mirror body is provided outside the bellows member, and the color-specific information of the display body is provided. , And was clearly visible from the outside of the transparent head.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tire air pressure reduction warning adapter which can be used by being attached to a mouthpiece of a tire valve or a wheel of a tubeless tire and visually confirming a tire air pressure reduction state from the outside.

[0002]

2. Description of the Related Art Conventionally, as a method of measuring the air pressure of a tire, a method has been adopted in which an air pressure measuring device is fitted into a valve mouthpiece provided in an air inlet of a tire or a tire tube. That is, a valve core is internally provided in the valve mouthpiece, and the valve opens when the valve core is pressed. When the air pressure measuring device is fitted into the valve mouthpiece, the valve core is pressed and the pressure air inside the tire is introduced into the air pressure measuring device, whereby the tire air pressure is measured.

There is also an apparatus for detecting the rotational speed of a tire with a sensor and measuring the decrease in tire air pressure.

However, the method of measuring the air pressure using the above-mentioned conventional air pressure measuring device has the following drawbacks. First, the air pressure measuring device itself and the measuring device are expensive,
General drivers are difficult to carry, and the price rises when installed as an option.

In addition, many tire wheels of recent years are rich in decorativeness, but such a wheel is often located in a place where the valve mouthpiece is deep, and it is often difficult to fit an air pressure measuring device. .

Further, in the case of automobiles having a large number of tires such as trucks and buses, it takes a considerable amount of time and labor to measure the air pressure of all the tires. In particular, when the truck or bus has a dual-wheel tire specification, it is difficult to measure the air pressure of the inner tire of the dual-wheel tire, and it is often difficult to visually check even if a commercially available pneumatic pressure indicator is attached.
In addition, it is hard to see that the tire pressures of tubeless tires for recent trucks and buses are gradually decreasing,
I often overlook it.

Further, in general, when observing tire pressure, the tire flatness (ratio of tire width to height) of passenger cars
Are mostly in the 65-45% series, with 7 for trucks, etc.
Since many of them are from 0 to 60% series, it is difficult to judge whether the tire pressure is normal or not by simple visual inspection.

Therefore, there is Japanese Patent Application No. 2001-181101 filed earlier by the applicant of the present invention as a tire air pressure alarm device which is mounted on a tire valve or a tubeless wheel to visually recognize the decrease in tire air pressure. 11 in the present application, which is a longitudinal cross-sectional view of the tire air pressure alarm device 1, in FIG. 11, a transparent window body 3a is formed on the head of the tire air pressure alarm device 1 so that the inside of the tire air pressure alarm device 1 can be visually recognized. An outer frame body 3 provided with a plurality of windows 2, and a vertically movable hemispherical head provided inside the outer frame body 3 and having a hemispherical head and a mirror-like surface, and a hemispherical head And the peripheral surface 10a following the columnar portion, the display body 10 is colored to display the state of the air pressure inside the tire by color, the pressing spring 12 that applies a downward biasing force to the display body 10, and the air pressure inside the tire is expanded and contracted. Guide to flexible bellows 8 A partition plate 5 provided with air inlet holes 4, the cylinder 7 to the outer cover of the bellows 8, the cylinder 7
A piston 9 which is installed inside and moves up and down as the bellows 8 expands and contracts, and a piston 9 which is provided below the partition plate 5 to press the valve core of the tire valve to open the tire valve and introduce air pressure into the cylinder 7. A valve core pressing member 6 is provided, the upper end of the bellows 8 is in contact with the lower end of the piston 9, and the display body 10 is supported by the upper part of the piston 9. When the air pressure in the tire of the display body 10 decreases, the bellows 8 contracts downward, and the peripheral surface 10 of the display body 10 decreases.
The color "a" is projected on the mirror surface of the head to change the color, and the color is visually confirmed from the transparent window 3a and the window 2 to confirm the state of the air pressure.

[0009]

Since the peripheral surface 10a on which the color information of the tire pressure is displayed is located around the head of the display body 10, the head surface of the hemispherical display body 10 is partially covered by a mirror surface. However, there was a case where the color was not projected, and it was difficult to visually recognize it from the window body 3a. Therefore, in the present invention, the display body provided with the color-specific information is provided at a position where it can be seen from the head of the transparent outer frame body, and the shape of the mirror surface for projecting this is devised and the convex lens for enlarging the display body. An object of the present invention is to provide a compact type tire pressure reduction warning adder capable of easily and surely visually confirming the present state of the tire pressure by mounting a body on the head and to contribute to traffic safety.

[0010]

In order to solve the above-mentioned problems, the invention according to claim 1 mounts a colored display member in the transparent head portion of the outer frame to display the tire pressure condition by color. An airtight and expandable bellows member for introducing pressure air of the tire into the outer frame body, and a pressing member for applying a biasing force to the valve core pressing member side from the outside of the bellows member or inside the bellows member. Load a spring or tension spring, attach a mirror surface body that displays the display body to the upper surface of the bellows member, and contract the bellows member when the air pressure inside the bellows member decreases.
The display body immersed in the specular body is exposed from the specular body to warn the reduction state.

According to the second aspect of the present invention, the display body is provided with a pressing spring that presses the bellows member when the air pressure in the bellows member is reduced and causes the display body that is immersed in the mirror body to appear from the mirror body.

According to a third aspect of the present invention, a colored T-shaped cross-section display body for visually recognizing the reduced tire pressure is attached to a position visible from the head of the outer frame, and the display body is enlarged. The convex lens body to be viewed is attached inside the head, and when the air pressure inside the bellows member is reduced, the pressing spring that makes the display body that is immersed in the mirror body emerge from the mirror body is attached to the outside of the bellows member or the tension spring is installed. The present invention is for both single-wheel tires and multi-wheel tires provided with a pressing spring provided inside the row member or for pressing the bellows member inside the display body.

According to a fourth aspect of the present invention, a colored indicator for visually recognizing the reduced tire air pressure is attached to the upper part of the bellows member, and the colored indicator for visually recognizing the reduced tire air pressure is provided on the upper part of the indicator. In addition, a coating pipe for concealing the coloring was hung from the inner wall of the head of the outer frame, and a mirror surface body having a through hole that penetrates the lower portion of the display body was attached to the inner peripheral surface of the head of the outer frame.

According to the first to fourth aspects of the present invention, when the tire is screwed into the mouthpiece of the tire valve, the valve pressed by the valve core pressing portion opens, and the compressed air in the tire is blown.
When introduced into the member, the air pressure value inside the tire and the air pressure value inside the bellow member become the same.

As the tire air pressure value fluctuates, the mirror body attached to the bellows member moves up and down, or the display body attached to the bellows member moves up and down, and the color-coded display on the display body is displayed on the mirror body. The air pressure can be confirmed by displaying it and visually recognizing it from the transparent head. Further, since the outer peripheral surface of the mirror-finished body is all mirror-finished, the color-based information can be well projected even if the length of the display body is short.

Further, in the case where the convex lens body is attached, the color-specific information can be enlarged and easily confirmed.

According to a fifth aspect of the present invention, in the shape structure of the mirror surface body, the central concave surface having the through hole for inserting the display body is a mirror surface, or the central concave surface having the through hole is a mortar. The conical body, which is a circular mirror surface, or the mirror surface having the through hole is formed by the concave lens body, and the color-based information can be easily confirmed.

The display having a T-shaped section is attached to
It is suitable not only for passenger cars with single-wheel tires but also for automobiles with multi-wheel tires such as buses and trucks. That is, the tire valve of a single-wheeled vehicle is directed outward, whereas the tire valve of a multi-wheeled vehicle is directed inward, so that it is difficult for the conventional tire air pressure alarm to visually recognize the color-based information. However, according to the present invention, when the bellows member contracts due to the reduction of the air pressure and the mirror surface body moves downward, the display body exposed from the mirror surface body can be visually recognized from any direction. That is, since the inside of the display body having a T-shaped cross section is mirror-finished, the display body is mirror-finished even when viewed from the side of the head of the transparent outer frame body, from an oblique direction, or from below. Even if the tire is clearly projected and is located at a deep position like the inner tire of the multi-wheel tire, or the tire with the valve on the outer side of the multi-wheel tire on the inner side, the reduction of the air pressure can be confirmed.

As described above, according to the present invention, since the structure is simple, it can be manufactured at a low cost, and once it is attached to the valve mouthpiece or the wheel of the tubeless tire, it is only necessary to visually check it thereafter. It is possible to easily and easily know the current state of tire pressure.

[0020]

BEST MODE FOR CARRYING OUT THE INVENTION A preferred embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a vertical cross-sectional view of the tire pressure reduction warning adapter 20 according to the first aspect. A warhead-shaped head 22 made of a transparent material, for example, transparent polycarbonate, is tightly fitted to the outer frame body 21 to make it airtight, and an air introduction hole 23 is formed in the lower portion of the outer frame body 21. A partition wall 24 is provided. A valve core pressing portion 25 is projectingly provided on a lower portion of the partition wall 24, and a female screw 26 is engraved on a lower inner peripheral wall of the outer frame body 21 and screwed to a valve mouthpiece of a tire valve.

The opening of the bottomed bellows member 27 is sandwiched by the partition wall 24 to cover the air inlet port 23, and is erected in the outer frame 21 in an airtight manner. When the female screw 26 is screwed onto the valve mouthpiece, the valve core pressing portion 25 presses the tire valve to open the tire valve, expand and contract depending on the pressure value of the pressure air introduced from the air introduction hole 23, and the pressure air leaks. Prevent. A hemispherical body 29 having a through hole 28 formed in the center thereof, and the surface of which is a mirror surface by plating or the like (see FIG. 10).
b) is attached to the upper surface of the bellows member 27. Outer frame 21
A pressing spring 30 is elastically supported between the collar edge 21a provided on the inner wall of the roller and the step portion of the bellows member 27.
When the air pressure in the inside, in other words, the tire air pressure drops below an appropriate value, the bellows member 27 is forcibly contracted. In FIG. 1, the pressing spring 30 is provided outside the bellows member 27, but it is possible to replace the pressing spring 30 with a tension spring 31 in the bellows member 27 as shown in FIG. The elastic force of the pressing spring 30 and the tension spring 31 is set to be lower than the pressure air value in the bellows member 27, and when the pressure air value decreases, the pressing force or the tensile force acts. Is. The initial setting values of the elastic force of the pressing spring 30 and the tension spring 31 are normal values of tire pressure, that is, 200 to 240 kPa or less for tires for passenger cars, and tires for large vehicles such as trucks and buses. 85
It is necessary to set it to 0 to 950 kPa or less. In addition, as for the shape of the mirror surface body 29, as shown in FIG. 10a, the upper surface of the hemispherical body is formed into a bowl-shaped concave surface 29a, or as shown in FIG.
As described above, the upper surface of the conical body may be formed into a mortar-shaped concave surface 29b, or as shown in FIG. 10d, the cylindrical body may be formed into a concave lens-shaped concave surface 29c.

The cylindrical display 32 hung from the top inner wall of the transparent head 22 of the outer frame 21 is colored to indicate the tire air pressure state by color. It is considered that when the air pressure is within the proper value range, it is classified into blue, and when the air pressure deviates from the proper value range, it is classified into red. This change in color is projected on the mirror surface of the mirror body 29 and visually recognized from the head 22.

When the bellows member 27 is extended, that is, when the tire air pressure is high, the indicator 32 is immersed in the through hole 28 of the mirror body 29, and the red portion of the danger signal cannot be seen. The blue part of the safety signal is visible,
As the tire air pressure decreases, the red portion of the danger signal of the display body 32 that is immersed in the through hole 28 appears and the specular body 2
Since the image is largely projected on 9, it is possible to visually confirm the reduced state of the tire air pressure.

2 and 3 are vertical sectional views showing another embodiment of the invention described in claim 1. In the case of FIG. 2, the concave surface 29a of the mirror body 29 is different. In the case of FIG. 3, the tension spring 31 is loaded in the bellows member 27.

4 and 5 are vertical sectional views of the tire pressure reduction warning adapter 40 according to the second aspect of the present invention. In the case of FIG. 4, the left half has a high tire pressure and the right half has a high tire pressure. It shows a decreasing state.

The difference from the invention described in claim 1 is that the display body 41 suspended from the inner wall of the head portion 22 of the outer frame body 21 has a cylindrical structure, and the pressing spring 30 is loaded inside the display body 41. -A point that is elastically supported on the upper surface of the member 27 and the mirror body 29 are shown in FIG.
In the case of, the mortar-shaped concave surface 29b is formed on the upper surface of the conical body (FIG. 10c), and in the case of FIG. 5, the upper surface of the hemispherical body is formed into a bowl-shaped concave surface 29a. (FIG. 10a) FIG. 6, FIG. 7 and FIG. 8 are longitudinal sectional views of a tire pressure reduction warning adapter 50 that can be worn in combination with the single-wheel tire and the multi-wheel tire according to claim 3, and FIG. Shows the state where the tire air pressure is high in the left half and the state where the tire air pressure is decreasing in the right half.

In the tire air pressure reduction warning adapter 50, a display body 51 having a T-shaped cross section is vertically provided on the inner wall of the top portion of the head portion 22, and the lower surface of the umbrella portion is formed into a mirror surface 51a. When the tire air pressure is at a normal value, the periphery of the umbrella portion of the display body 51 and the periphery of the mirror body 29 are in close contact with each other, and the colored portion of the display body 51 is hidden. The colored portion of the display body 51 appears and the color change is reflected on the concave surface 29a of the mirror body 29 and the mirror surface 51a, and can be visually recognized from any direction of the transparent head 22. Further, the projected color change can be magnified and clearly recognized by the convex lens body 52 attached to the inner wall of the head 22.

FIG. 9 shows the invention according to claim 4, wherein the tire air pressure reduction warning adapter 60 causes the indicator 32 attached to the bellows member 27 to move the bellows member 27 by the action of the tension spring 31 when the tire air pressure decreases. Contraction of the outer frame body, the red portion 32 of the display body 32 which begins to emerge from the covered pipe 53 attached to the top inner wall of the head portion 22 of the outer frame body and which shows identification information.
That is, a is projected on the mirror surface 29a.

FIG. 10 is an invention according to claim 5, wherein the shape structure of the mirror surface body has a through hole 28 through which the display body 32 is inserted, and the central concave surface is a hemispherical body having a mirror surface, or the through hole 28. The central concave surface is a conical body which is a mortar-shaped mirror surface 29b, or a mirror surface 29c having a through hole 28 is formed of a concave lens body.

[0031]

Since the present invention is constructed as described above, it has a simple structure and therefore can be manufactured at a low cost. Further, once it is attached to the valve mouthpiece, it is only necessary to visually check it thereafter. As described above, it is possible to easily know the current state of the tire air pressure value.

Further, the display body is T-shaped and the T-shaped umbrella lower surface is mirror-finished so that the outer valve of the multi-wheel tire is on the inner side or the inner tire is at a deeper position. The air pressure of the tire located at is easily visible.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of a tire pressure reduction warning adapter 20 according to claim 1.

FIG. 2 is a vertical cross-sectional view showing another embodiment of the tire pressure reduction warning adapter 20 according to claim 1.

FIG. 3 is a vertical cross-sectional view showing another embodiment of the tire pressure reduction warning adapter 20 according to claim 1.

FIG. 4 is a vertical cross-sectional view of the tire pressure reduction warning adapter 40 according to claim 2.

FIG. 5 is a longitudinal sectional view of another tire pressure reduction warning adapter 40 according to claim 2;

FIG. 6 is a vertical cross-sectional view of the tire pressure reduction warning adapter 50 according to claim 3.

FIG. 7 is a vertical sectional view of another tire pressure reduction warning adapter 50 according to claim 3;

FIG. 8 is a longitudinal sectional view of another tire pressure reduction warning adapter 50 according to claim 3;

FIG. 9 is a vertical cross-sectional view of the tire pressure reduction warning adapter 60 according to claim 4.

FIG. 10 is a cross-sectional view of a specular body showing color-specific information. b A cross-sectional view of another specular body that projects color-specific information. c A cross-sectional view of another specular body that projects color-specific information. d is a cross-sectional view of another specular body showing color-specific information.

FIG. 11 is a vertical cross-sectional view of a conventional tire pressure alarm device.

[Explanation of symbols]

20, 40, 50, 60 ·· Tire pressure reduction warning adapter 21 Outer frame 22 · · Outer frame head 23 · · Air introduction hole 24 ·
・ Partition wall 25 ・ Valve core pressing part 27 ・ ・ Bellower member
28 ... Through hole 29. Mirror body 32, 41, 51 .. Display body 30
..Pressing spring 31..tension spring 52..Convex lens body 53..Coated pipe

─────────────────────────────────────────────────── ─── Continuation of the front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) G01L 17 / B60C 23 /

Claims (5)

(57) [Claims] 1. An outer frame body provided with a valve core pressing portion for pressing a valve core of a tire valve to open the tire valve and introducing pressure air in the tire into a bellows member.
The head of the airtight outer frame is made of a transparent material, and a colored display that allows you to see the reduced tire air pressure is attached at a position where you can see it from the head. Introduce the airtight bellows member, and attach the mirror body that displays the display to the upper surface of the bellows member, and when the air pressure inside the bellows member is reduced, the bellows member is contracted and immersed in the mirror body. A tire air pressure reduction warning adapter comprising a pressing spring or a tension spring for exposing the display body from a mirror surface body, which is provided outside or inside the bellows member. 2. An outer frame body provided with a valve core pressing portion for pressing a valve core of a tire valve to open the tire valve and introducing pressure air in the tire into a bellows member.
The head of the airtight outer frame is made of a transparent material, and a colored display that allows you to see the reduced tire air pressure is attached at a position where you can see it from the head. In addition to installing an airtight bellows member, a mirror surface body that displays the display body was attached to the upper surface of the bellows member, and when the air pressure inside the bellows member was reduced, the bellows member was pressed and the mirror body was immersed. A tire air pressure reduction warning adapter which is provided with a pressing spring for causing the display body to emerge from the mirror surface body. 3. An outer frame body provided with a valve core pressing portion for pressing the valve core of the tire valve to open the tire valve and introducing the compressed air in the tire into the bellows member.
The head of the airtight outer frame is made of transparent material, and a colored T-shaped cross-section display is attached at a position where you can see it from the head and the display is enlarged. The convex lens body to be viewed is mounted in the head, and the airtight bellows member for introducing the compressed air in the tire is inserted into the outer frame body, and the mirror surface body for reflecting the lower concave surface of the display body and the rod body is bellows member. When the air pressure inside the bellows member is reduced, the pressure spring that presses the bellows member to expose the display body that is immersed in the mirror body out of the mirror body is attached to the outside of the bellows member, or a tension spring is installed. A tire air pressure reduction warning adapter, which is provided inside the row member or is equipped with a pressing spring for pressing the bellows member inside the display body. 4. An outer frame body provided with a valve core pressing portion for pressing a valve core of a tire valve to open the tire valve and introducing pressure air in the tire into a bellows member.
The head of the airtight outer frame is made of a transparent material, and a colored display that allows you to see the reduced tire air pressure is attached to the upper part of the bellows member, and the covered pipe that hides the colored part is removed. When the air pressure in the bellows member is reduced by attaching the mirror surface body with the through hole that inserts the lower part of the display body to the head inner surface of the frame body A tire air pressure reduction warning adapter characterized in that the bellows member is contracted and the colored portion of the display is exposed from the covered pipe for visual recognition. 5. The shape structure of the mirror surface body is a hemispherical body in which a central concave surface having a through hole for inserting a display body is a mirror surface, or a conical body in which the central concave surface having a through hole is a mortar-shaped mirror surface. Or a mirror surface having a through hole is a concave lens body.
Alternatively, the tire pressure reduction warning adapter according to claim 2 or claim 3 or claim 4.