JP2000052726A - Casing structure of transmitter for tire air pressure alarming device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate intercoupling of a tire valve forming a transmission antenna and an electronic substrate by a method wherein a continuity pin is electrically connected to a tire valve through a continuity bracket in a proper format is integrally arranged on the electronic substrate containing chamber side of a casing through insert-molding. SOLUTION: In the casing structure of a transmitter 5 for a tire air pressure alarming device formed that a pressure detecting part, a signal processing circuit to transmit a detecting pressure therefrom to a receiver by a radio wave by means of a signal, an electronic substrate 1 having a microcomputer, and a battery 2 to operate the microcomputer are contained in a casing 3, and a tire valve 4 having a transmission antenna function is integrally arranged at the upper part of the casing 3, a continuity pin 8 electrically connected to the lower end surface of the tire valve 4 through a proper continuity means is formed on the electronic substrate 1 containing chamber side in the casing 3 and integrally with the casing 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a casing structure of a transmitter for a tire pressure warning device for detecting abnormality in tire pressure and warning a driver in a vehicle compartment, and more particularly to a tire having an antenna function. By providing a conductive pin that is connected to the lower end surface of the valve integrally with the casing,
The present invention relates to a casing structure of a transmitter for a tire pressure warning device that can easily connect a tire valve serving as a transmission antenna and an electronic board on which a microcomputer and the like are integrated.

[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. A conventional transmitter 5 is shown in FIGS. As described above, the tire valve 4 in which the valve core 12 is incorporated 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 including a pressure detection unit, a signal processing circuit for transmitting a signal of the detected pressure to a receiver on the vehicle body by radio waves, a microcomputer, and the like, heats three bosses 9 formed in the casing 3. It is fixed by swaging. Battery 2
Is fixed to the bottom of the casing 3 with an adhesive.
The transmission signal generated by the signal processing circuit is transmitted from the electronic board 1 via the conductive bracket 6 to the tire valve 4.
Sent to

The casing 3 is sealed by a lid 15 (see FIG. 5). The lid 15
Has a through-hole (not shown) so that the tire internal pressure and the casing internal pressure are the same. The tire valve 4 has a built-in valve core 12,
The injected air is injected into the tire through a ventilation hole 14 (see FIG. 5) formed in a thick portion of the upper part of the casing 3.

[0004]

When the transmitter 5 is fixed, an external thread of the tire valve 4 constituting a part of the transmitter is fitted into a valve hole of a wheel rim via a grommet 13 and a washer, It is screwed tightly with a nut (not shown). In addition, since a vibration of the vehicle and a centrifugal force due to the rotation of the wheel act on the transmitter 5, a conductive bracket 6 protruding from one end of the electronic substrate 1 is attached to the lower end of the tire valve 4 by a small-diameter screw. Screwing at 17, and then screw locking had to be done.

However, since the above-mentioned small screw 17 has a small diameter, the tightening control becomes insufficient, and in some cases, forgetting to tighten the screw may occur. Further, there is a danger that the small-diameter screw 17 may fall off due to the vibration, centrifugal force or the like of the vehicle after the vehicle is mounted, causing serious defects in the function of the transmitter.

[0006]

According to the present invention, a conducting pin 8 for conducting to a tire valve via a conducting bracket 6 of an appropriate form is integrally provided on an electronic substrate storage chamber side of a casing 3 by insert molding. Accordingly, an object of the present invention is to provide a casing structure of a transmitter for a tire air pressure warning device, which can easily and reliably connect a tire valve serving as a transmission antenna to an electronic board on which a microcomputer and the like are integrated.

That is, the casing structure of the transmitter for a tire pressure alarm device according to the present invention comprises a pressure detector for detecting the tire pressure and a signal processing circuit for transmitting the detected pressure to a receiver on the vehicle body side by radio waves. And an electronic board 1 including a microcomputer and a battery 2 for operating the microcomputer.
Are housed in a casing 3, and a tire valve 4 having a transmitting antenna function is integrally provided at an upper portion of the casing 3. A conductive pin 8 that is connected to the lower end surface of the tire valve 4 via an appropriate conductive means is provided integrally with the casing 3 on a certain electronic substrate 1 storage chamber side.

[0008]

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 of a casing of a transmitter for a tire pressure alarm device of the present invention. FIG.
FIG. 2 is a vertical sectional view taken along line AA of FIG. The transmitter 5 in the tire pressure warning device of the present invention has a tire valve 4 having a built-in valve core 12 and a casing 3 similarly to the conventional product.
And are provided integrally. Further, in the casing 3 according to the present invention, a conduction pin 8 electrically connected to the lower end surface of the tire valve 4 via a suitable conduction means is provided on the casing 3 side of the storage chamber of the electronic board 1 integrally with the casing 3. And the conduction pins 8 serve as the electronic board 1.

FIG. 3 is an external perspective view of the tire valve subassembly. In this figure, reference numeral 6 denotes an L-shaped conductive bracket. One end of the bracket 6 is electrically connected to the lower end surface of the tire valve 4 by a press-fit pin 7. The conductive pin 8 is fixed to the portion by soldering or the like. The tire valve subassembly 18 shown in FIG. 3 is integrated with the casing 3 by insert molding.

[0010]

As described above, in the casing structure of the transmitter for a tire pressure alarm device of the present invention, the conducting pin 8 electrically connected to the lower end surface of the tire valve 4 having an antenna function is integrated with the casing 3. By providing the antenna, the tire valve 4 serving as a transmitting antenna can be easily connected to the electronic substrate 1, and the conduction path is secured without being loosened by vibration or impact of the vehicle. Further, as compared with the conventional method, there is no need for a time-consuming operation such as screwing or the like, which is considerably advantageous in terms of cost (parts, assembly).

[Brief description of the drawings]

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

FIG. 2 is a vertical sectional view taken along the line AA of FIG.

FIG. 3 is an external perspective view of a tire valve subassembly of the present invention.

FIG. 4 is an external perspective view of a conventional transmitter for a tire pressure warning device.

FIG. 5 is a vertical sectional view taken along line BB of FIG. 5;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Electronic board 2 Battery 3 Casing 4
Tire valve 5 Transmitter 6 Conduction bracket 7 Press-fit pin 8
Conductive pin 9 Boss part 10 Power bracket 11 Communication hole 12 Valve core 13 Grommet 14 Vent hole 15 Lid 18 Tire valve sub-assembly

Claims (1)

[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 a casing structure of a transmitter 5 for a tire air pressure warning device in which a tire valve 4 having a transmitting antenna function is integrally provided at an upper part of the casing 3, an electronic board 1 provided in the casing 3 is provided. A casing structure of a transmitter for a tire air pressure warning device, wherein a conducting pin 8 electrically connected to a lower end surface of a tire valve 4 via a suitable conducting means is provided integrally with the casing 3 on the storage chamber side. .