JP5953388B1 - Tire pressure alarm - Google Patents

Abstract

An object of the present invention is to improve a conventional tire pressure alarm device and provide a cover that can be detachably attached so that the battery can be replaced by assembling and disassembling. A tire air pressure alarm device 1 that is attached to a tire valve base and forms a conductive circuit when an air pressure in the tire falls below an appropriate value and an alarm device generates an alarm signal indicating that the tire air pressure is insufficient. And in order to improve confidentiality, the outer frame cover 100 which covers the outer periphery of the base 2, the conductive cover 4, and the alarm device 10 is provided, and the outer frame cover 100 can be assembled and disassembled by being detachably attached. . [Selection] Figure 1

Description

  The present invention relates to a tire pressure alarm device in which when an air pressure in a tire falls below an appropriate value, a current flows to form a conductive circuit and an alarm device generates an alarm signal indicating that the tire pressure is insufficient.

  As for a conventional tire pressure alarm device, for example, Japanese Patent Laid-Open No. 2003-57139 (Patent Document 1) can be manufactured at low cost, and the tire pressure state can be easily and easily known. For the purpose of providing a tire pressure alarm that can easily know the decrease in air pressure even in a dark place or at night etc. like a tire inside, it is equipped with a light emitting diode and light emitting diode An electric circuit chamber for supplying electric power to the outer frame body having a cylinder chamber and a valve core pressing member for introducing air pressure into the cylinder chamber, a piston body, a pressing spring, and a light emitting diode There has been proposed a “tire air pressure alarm” composed of an electric circuit having a power supply body such as a lithium button battery.

  In addition, in Japanese Utility Model Registration No. 3154543 (Patent Document 2), a metal piece that moves up and down by the air pressure of a tire is provided on a bottom seat that is screwed into a tire valve and has a vent hole that conducts air of the tire. A moving part that moves up and down is arranged, a spring is arranged on the moving part between the pressure adjustment part, and the electrical connection between the battery unit and the circuit board provided with the alarm device is connected to the spring by the tire air pressure. When the air pressure is low, the alarm device is activated when the air pressure is low by the contact between the moving part that moves up and down and the conductive socket in the insulator positioning cylinder. Is proposed.

  However, in the above-described conventional tire pressure alarm, the built-in battery cannot be replaced after assembly, so when the battery life is exhausted, the entire body must be replaced, and the user's expense is borne. There was a problem that increased. In addition, when the tire pressure alarm is discarded due to battery exhaustion, the built-in battery cannot be taken out, which has a problem of adversely affecting the environment.

JP 2003-57139 A Utility Model Registration No. 3154543

  Therefore, the present inventor has made extensive studies by the inventor of the present application, and as a result, the conventional tire pressure alarm has been improved, and a battery can be replaced by providing a detachable cover to allow assembly and disassembly. The purpose is to extend the life of the battery by providing a switch.

  In order to solve the above-mentioned problem, the invention according to claim 1 is configured such that an alarm device is formed by forming a circuit in which a current flows when a tire valve is attached to a base of a tire valve and an air pressure in the tire falls below an appropriate value. A tire pressure alarm that generates a warning signal for tire pressure shortage, wherein the tire pressure alarm includes a bottom seat that is screwed to a valve of a tire, a conductive socket that is screwed to the bottom seat, A conductive cover that is fitted to the outside, an insulating cylinder that is fitted to the inside of the conductive socket, a moving part that is disposed in a storage space of the insulating cylinder, a spring that presses the moving part, and the spring A pressure adjusting unit that presses the battery unit, a battery unit that is electrically connected to the pressure adjusting unit, an alarm device that is electrically connected to the battery unit, the bottom seat and the conductive cover to improve confidentiality. And an outer frame cover that covers the outer peripheral surface of the alarm device, and when the air pressure in the tire is smaller than the set value of the spring, the moving portion and the conductive socket come into contact with each other due to the pressing force of the spring. Then, the circuit is conducted, the alarm device generates an alarm signal indicating that the tire air pressure is insufficient, and the outer frame cover is detachably attached so that it can be assembled and disassembled.

  According to a second aspect of the present invention, the tire pressure alarm device according to the first aspect includes a switch member, and the switch member includes a main body portion and a cylindrical portion that are screwed to the bottom seat, A protruding portion is formed at the tip of the cylindrical portion, and the moving portion and the conductive socket can be brought into a non-contact state by a pressing force of the cylindrical portion, so that the cylindrical portion can be turned off.

As described above, according to the tire pressure alarm device of the present invention, the outer frame cover of the tire pressure alarm device is detachably attached, so that assembly and disassembly are possible. Thereby, even after assembly, the battery unit (button battery), which is a consumable item, can be replaced. In addition, since the battery unit (button battery) can be easily taken out when it is discarded, it is structured in consideration of the environment.
Further, by providing a switch member for turning on / off the power supply, it is possible to prevent the battery unit (button battery) from being electrically consumed and extend the life of the battery.
Furthermore, malfunction can be prevented by adjusting the contact area between the moving part and the conductive socket.

It is sectional drawing which shows an example (off state) of the tire pressure alarm device concerning this invention. It is sectional drawing which shows the ON state of the tire pressure alarm device shown in FIG. It is sectional drawing which shows the use condition of the tire pressure alarm device shown in FIG.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In addition, about each structure of the tire pressure alarm device of this invention, it is not limited to a following example, It can change suitably with a use condition.

  FIG. 1 is a sectional view showing an example (off state) of a tire pressure alarm device according to the present invention, and FIG. 2 is a sectional view showing an on state of the tire pressure alarm device. As shown in FIGS. 1 and 2, the tire pressure alarm 1 includes a bottom seat 2, a conductive socket 3, a conductive cover 4, an insulating cylinder 5, a moving unit 6, a spring 7, a pressure adjusting unit 8, a battery unit (button battery). 9. It is comprised from the alarm device 10 and the outer frame cover 100 attached detachably.

  As shown in FIGS. 1 and 2, a screw hole 21 is provided in the lower end portion of the bottom seat 2, and a ventilation hole 22 that is coaxially connected to the screw hole 21 is formed. A recess 23 for positioning the moving piece 24 is provided at the upper end of the bottom seat 2. The moving piece 24 is composed of a member whose central portion is movable in the vertical direction, and is specifically composed of a cylindrical thin plate diaphragm or a telescopic bellows, and the material thereof is made of metal, rubber, cloth, or plastic. Select as appropriate. When the moving piece 24 is received and positioned in the recess 23 at the upper end of the bottom seat 2, the upper portion of the vent hole 22 is closed. When the screw hole 21 at the lower end of the bottom seat 2 is screwed into the tire valve, the air in the tire pushes up the moving piece 24 through the screw hole 21 and the vent hole 22, and the central portion of the moving piece 24 protrudes upward. To generate an upward force (see FIG. 3). A large-diameter screw portion 25 is provided outside the lower end portion of the bottom seat 2 and is screwed into a screw hole 101 at the lower end portion of the outer frame cover 100 described later. A small-diameter screw portion 26 is provided outside the upper end portion of the bottom seat 2 and is screwed into a screw hole 31 of the conductive socket 3 described later.

  The conductive socket 3 is formed in a cylindrical shape, and a screw hole 31 to be screwed to the bottom seat 2 is provided at a lower end portion thereof. A shaft hole 33 is provided at the center of the contact portion 32 that protrudes to the inside of the conductive socket 3, and the upper portion of the contact portion 32 of the conductive socket 3 extends vertically. The lower end portion of the conductive cover 4 is fitted to the outside of the conductive socket 3, and the lower end portion of the insulating cylinder 5 is fitted to the inner side of the conductive socket 3. The conductive cover 4 is formed of a metal cover, and the lower end portion of the conductive cover 4 is fitted into the conductive socket 3 so that the conductive cover cover 4 and the conductive socket 3 are electrically connected.

The insulating cylinder 5 is a cylindrical hollow cylinder made of a plastic material. A screw hole 51 is provided in the lower end portion of the insulating cylinder 5 and is screwed to a screw portion 81 of the pressure adjusting portion 8 described later.
The moving unit 6, the spring 7, and the pressure adjusting unit 8 are disposed so as to overlap in the storage space at the lower end of the insulating cylinder 5.

  The moving part 6 includes a concave metal fitting 61 having a flat plate part 62 and an insulating pillar 63. The upper part of the insulating pillar 63 is fitted in the concave part of the concave metal fitting 61, and the lower part of the insulating pillar 63 protrudes below the flat plate part 62. The lower part of the insulating pillar 63 is positioned above the moving piece 24 through the shaft hole 33 of the conductive socket 3. The spring 7 presses the upper surface of the flat plate portion 62 of the concave metal fitting 61 at its lower end. The pressure adjusting portion 8 is provided with a screw portion 81 on the outside, and is screwed into the screw hole 51 of the insulating cylinder 5 and is positioned so as to be adjustable in the vertical direction. Thus, the spring 7 is pressed downward and the step force is adjusted.

  The upper end of the pressure adjusting unit 8 is electrically connected to the positive electrode at the bottom of the battery unit (button cell) 9. The negative electrode at the upper end of the battery unit (button battery) 9 is connected to the circuit board 11. The circuit board 11 is electrically connected to the conductive cover 4. Further, the circuit board 11 and the warning light 12 constitute the warning device 10. The alarm lamp 12 is preferably a light emitting diode.

  A metal contact piece 91 made of a spring is disposed between the battery unit (button cell) 9 and the pressure adjusting unit 8. As a result, the upper end of the metal contact piece 91 is electrically connected to the positive electrode at the bottom of the battery unit (button cell) 9, and the lower end of the metal contact piece 91 presses against the ceiling portion of the pressure adjusting unit 8. The unit (button cell) 9 and the pressure adjusting unit 8 are electrically connected.

  As shown in FIGS. 1 and 2, the outer frame cover 100 is formed in a cylindrical shape that covers the entire outer peripheral surface of the bottom seat 2, the conductive cover 4, and the alarm device 10 in order to improve confidentiality. The bottom seat 2 is screwed to the lower end portion of the bottom seat 2. The material of the outer frame cover 100 is preferably a transparent plastic material having strength and durability. The outer frame cover 100 of the tire pressure alarm 1 is detachably attached, so that assembly and disassembly are possible. Thereby, even after assembly, the battery unit (button battery) 9 that is a consumable can be replaced.

  As shown in FIGS. 1 and 2, the tire air pressure alarm device 1 includes a switch member 93 that turns on and off the power supply. The switch member 93 includes a main body portion 94 that is screwed into the screw hole 21 of the bottom seat 2 and a cylindrical portion 95 that extends vertically upward on the upper surface thereof. The upper end of the columnar part 95 has a protruding part extending upward. As a result, before the bottom seat 2 is screwed to the tire valve, the switch member 93 is attached to the bottom seat 2 and the cylindrical portion 95 is inserted into the vent hole 22 as shown in FIG. Thus, the concave metal fitting 61 of the moving part 6 and the conductive socket 3 can be turned off, the electric consumption of the battery unit (button battery) 9 can be prevented, and the battery life can be extended. For this reason, when the tire pressure alarm is stored as a long-term product inventory, or when the tire pressure alarm is not used, the power can be arbitrarily turned off to prevent the battery unit (button battery) from being consumed.

  As shown in FIG. 3, when the bottom seat 2 is screwed into the tire valve and the air pressure in the tire is larger than the set value of the spring 7, the moving portion 6 is moved upward by the force that the air pressure pushes up through the moving piece 24. As a result, the concave metal fitting 61 of the moving part 6 and the conductive socket 3 are separated from each other and are turned off. On the other hand, when the air pressure in the tire is smaller than the set value of the spring 7, the concave metal fitting 61 of the moving part 6 and the conductive socket 3 come into contact with each other by the pressing force of the spring 7, and the current flows to the battery unit (button battery) 9, metal The contact piece 91, the pressure adjusting unit 8, the spring 7, the moving unit 6, the conductive socket 3, the conductive cover 4, and the alarm device 10 flow to form a conductive circuit, and the circuit board 11 of the alarm device 10 is connected to the alarm lamp 12. A light emitting diode is turned on to generate an alarm signal indicating insufficient tire pressure.

  Further, an insulating tape (not shown) that covers a part of the upper surface of the contact portion 32 of the conductive socket 3 can be provided. Since a large contact area between the lower surface of the flat plate portion 62 of the concave metal fitting 61 and the upper surface of the contact portion 32 of the conductive socket 3 may cause malfunction, it is desirable to adjust the contact area. The means for adjusting the contact area is not limited to the insulating tape.

DESCRIPTION OF SYMBOLS 1 Tire pressure alarm 2 Bottom seat 3 Conductive socket 4 Conductive cover 5 Insulating cylinder 6 Moving part 7 Spring 8 Pressure adjusting part 9 Battery unit (button battery)
DESCRIPTION OF SYMBOLS 10 Alarm apparatus 11 Circuit board 12 Warning lamp 21 Screw hole 22 Vent hole 23 Recess 24 Moving piece 25 Screw part 26 Screw part 31 Screw hole 32 Contact part 33 Shaft hole 51 Screw hole 61 Recessed metal fitting 62 Flat plate part 63 Insulating pillar 81 Screw part 91 Metal contact piece 93 Switch member 94 Main body part 95 Column part 100 Outer frame cover 101 Screw part

Claims (2)

A tire pressure alarm device that is attached to a tire valve base and when a pneumatic pressure in the tire falls below an appropriate value, a current flows to form a conductive circuit and an alarm device generates an alarm signal indicating that the tire pressure is insufficient.
The tire pressure alarm includes a bottom seat screwed to a tire valve, a conductive socket screwed to the bottom seat, a conductive cover fitted outside the conductive socket, and fitted inside the conductive socket. An insulating cylinder to be joined, a moving part disposed in a storage space of the insulating cylinder, a spring pressing the moving part, a pressure adjusting part pressing the spring, and the pressure adjusting part electrically connected A battery unit, an alarm device electrically connected to the battery unit, and an outer frame cover that covers an outer peripheral surface of the bottom seat, the conductive cover, and the alarm device in order to improve confidentiality,
When the air pressure in the tire is smaller than the set value of the spring, the moving portion and the conductive socket come into contact with each other due to the pressing force of the spring and the circuit is conducted, and the alarm device outputs an alarm signal indicating that the tire air pressure is insufficient. Occur,
A tire pressure alarm device, wherein the outer frame cover can be assembled and disassembled by being detachably attached. The tire air pressure alarm device according to claim 1 includes a switch member, and the switch member includes a main body portion and a cylindrical portion that are screwed to the bottom seat, and a protruding portion is formed at a tip of the cylindrical portion. The tire pressure alarm device according to claim 1, wherein the moving portion and the conductive socket can be brought into a non-contact state by a pressing force of the cylindrical portion so as to be in an off state.

Images