JP2000025430A - Casing structure of transmitter for tire inflation pressure warning device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance the rigidity of a casing, and also prevent an adhesive for fixing a battery from flowing out by completely separating an electronic board and a battery stored in the casing by means of a partition wall. SOLUTION: In a casing of the transmitter 5 for the fire inflation pressure warning device, an electronic board 1 provided with a pressure detecting element for detecting the tire inflation pressure, a signal processing circuit for transmitting the detected pressure to a receiver on the car body side by means of radio waves, and a microcomputer, and a battery 2 for operating the microcomputer, are housed in a casing 3, and a tire valve 4 for filling the tire with inflation pressure is integrally provided with the casing at the upper part of the casing 3, a circular arc-like partition wall is provided along the outline of the battery in about the center part of the casing 3, and a battery storage room 7 and a board storage room 8 are separated by the partition wall 6.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a casing of a transmitter for a tire pressure warning device for detecting an abnormality in tire pressure and warning a driver in a vehicle compartment, and more particularly to a microcomputer housed in the casing. The present invention relates to a casing structure of a transmitter for a tire air pressure warning device in which a battery and a battery are completely separated by a partition wall to prevent an adhesive for fixing the battery from flowing out.

[0002]

2. Description of the Related Art A transmitter in a tire pressure warning device transmits tire pressure information to a receiver (not shown) provided in a vehicle cabin, and a conventional transmitter 5 has, as shown in FIG. A tire valve 4 having a built-in valve core (not shown) is provided integrally with the casing 3, and the casing 3 of the transmitter 5 is formed in a rectangular box shape. The electronic board 1 provided with a signal processing circuit for transmitting a signal to the receiver on the side and a microcomputer and the like is fixed to three boss portions 9 formed on the casing 3 by heat caulking. The battery 2 is fixed to the bottom of the casing 3 with an adhesive. The battery 2 and the electronic substrate 1 are electrically connected by the conductive bracket 10. In the drawing, reference numeral 7 denotes a battery storage room, and 8 denotes a substrate storage room.

[0003] The casing 3 is sealed by a lid (not shown). In the drawing, reference numeral 11 denotes a communication hole, so that the tire internal pressure and the internal pressure of the casing become the same. The tire valve 4 has a built-in valve core (not shown), and the injected air is injected into the tire through a ventilation hole (not shown) formed in a thick portion at the upper part of the casing. ing.

[0004]

When the transmitter is fixed, a male screw of the tire valve 4 constituting a part of the transmitter is fitted into a valve hole of a wheel rim via a grommet 12, and a washer and a nut are mounted. Confidentially screwed in. However, since the transmitter 5 is subject to the centrifugal force due to the vibration of the vehicle and the rotation of the wheel, the heaviest battery 2 in the casing is fixed by bonding or by resin molding. I had to.

However, in the above-mentioned adhesive fixing and resin molding, the adhesive flows from the battery storage chamber 7 into the substrate storage chamber 8 during the operation or heat curing, or the molded resin flows in the same manner, and the battery 2 Not only can not be fixed firmly, but also when the adhesive adheres to the high frequency part of the electronic substrate 1, the transmission output changes.

[0006]

According to the present invention, an electronic substrate housed in a casing and a battery are completely separated by a partition wall to prevent the adhesive for fixing the battery from flowing out, and the battery is firmly fixed. It is another object of the present invention to provide a casing structure of a transmitter for a tire pressure alarm device that can prevent an adhesive from adhering to a high-frequency portion of an electronic substrate.

In other words, the casing structure of the transmitter for a tire pressure alarm device according to the first invention is a pressure detector for detecting the tire pressure and a signal for transmitting the detected pressure to a receiver on the vehicle body by radio waves. An electronic board 1 having a signal processing circuit, a microcomputer, and the like, and a battery 2 for operating the microcomputer are housed in a casing 3, and a tire valve 4 for injecting air into a tire is provided above the case 3. In the casing of the transmitter 5 for the tire pressure warning device provided integrally, an arc-shaped partition wall 6 is provided at a substantially central portion of the casing 3 along the outer shape of the battery. The substrate storage chamber 8 is separated.

In the second invention, a wall in the upper center of the casing 3 where the battery storage chamber 7 and the substrate storage chamber 8 face each other is formed in a tapered shape, so that the battery 2 and the electronic substrate 1 have a play inside the casing. 2. The casing structure of a transmitter for a tire pressure alarm device according to claim 1, wherein attachment of the transmitter is prevented.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is an external perspective view showing a casing of a transmitter for a tire pressure alarm device of the present invention.
The transmitter in the tire pressure alarm device of the present invention has a tire valve 4 having a built-in valve core provided integrally with a casing 3 as in the conventional product. The casing 3 of the present invention is formed in an oblong box shape.
An arc-shaped partition wall 6 is provided at a substantially central portion along the outer shape of the battery.
A substrate storage chamber 8 is formed on the right side, and the battery 2 and the electronic substrate 1 are stored therein, respectively.

The casing 3 has a tapered wall surface at the upper center of the casing 3 where the battery storage chamber 7 and the substrate storage chamber 8 face each other. The backlash can be prevented.

The electronic board 1 includes a pressure detecting unit, a signal processing circuit for transmitting a signal to the receiver on the vehicle body by radio waves based on the detected pressure, and a microcomputer, etc., as in the conventional product. The electronic substrate 1 is fixed to three boss portions 9 formed on the casing 3 by heat caulking. Also, the battery 2 is fixed to the bottom of the casing 3 with an adhesive, and the battery 2 and the electronic board 1 are electrically connected by the conductive bracket 10 as in the conventional product.

[0012]

As described above, the casing structure of the transmitter for a tire pressure warning device according to the present invention has a structure in which the electronic board 1 and the battery 2 housed in the casing 3 are completely separated by the partition wall. In addition to increasing the rigidity, the battery can be firmly fixed because the adhesive for fixing the battery does not flow out. Further, since it is possible to prevent the adhesive from adhering to the high-frequency portion of the electronic substrate 1, the previously adjusted transmission output does not change.

[Brief description of the drawings]

FIG. 1 is an external perspective view showing a casing of a transmitter for a tire pressure alarm device of the present invention.

FIG. 2 is an external perspective view showing a casing of a conventional transmitter for a tire pressure warning device.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Electronic board 2 Battery 3 Casing 4
Tire valve 5 Transmitter 6 Partition wall 7 Battery storage room 8 Substrate storage room 9 Boss part 10 Conductive bracket 11 Communication hole 12 Grommet

Claims (2)

[Claims] 1. An electronic board 1 comprising a pressure detector for detecting tire pressure, a signal processing circuit for transmitting a signal to a receiver on the vehicle body by radio waves based on the detected pressure, a microcomputer, and the like.
Battery 2 for operating the microcomputer and casing 3
In the casing 3 of the transmitter 5 for a tire pressure alarm device, a tire valve 4 for injecting air into a tire is integrally provided at an upper portion of the casing 3.
An arc-shaped partition wall 6 is provided substantially at the center of the casing 3 along the outer shape of the battery, and the battery storage chamber 7 and the substrate storage chamber 8 are separated by the partition wall 6. Transmitter casing structure. 2. A wall in the upper center of the casing 3 where the battery storage chamber 7 and the substrate storage chamber 8 face each other is formed in a tapered shape so as to prevent rattling of the battery 2 and the electronic substrate 1 in the casing. The casing structure of the transmitter for a tire pressure alarm device according to claim 1, wherein