JPH09289362A - Board - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a board which enables ensuring sufficient antenna performance and which does not cause an antenna pattern 4 to generate a short circuit at a connector joint with a pattern end 3 of a wiring pattern, by realizing a continuous antenna pattern of the same width. SOLUTION: A connector joint portion 12 is integrally formed in a state of protruding outward from an outer peripheral edge of a board 11. In this connector joint portion 12, a through-hole 12a of a rectangular shape in a plan view is formed. On the inner side from the through-hole 12a on the board, a plurality of pattern ends 13 of wiring patterns directly in contact with an external connector are formed. On the outer side from the pattern ends 13 and the through-hole 12a on the board, an antenna pattern 14 of a protruding shape in a plan view having the same width is continuously formed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a substrate suitable for application to, for example, a meter substrate of a meter device mounted on a vehicle.

[0002]

2. Description of the Related Art In recent years, it is well known that a keyless unit for controlling the start of an engine of a vehicle or the opening / closing of a door key is widely used by remote control from the outside of the vehicle. This keyless unit is
Generally, a receiving circuit for receiving transmission data including an identification code (ID code) transmitted from a predetermined transmitter carried by a driver, and decoding the ID code in the received reception data, and A code decoding circuit that determines whether or not the ID code matches a pre-registered reference ID code, and controls the start of the engine of the vehicle or the opening and closing of the door lock according to the result of the decoding by the code decoding circuit. It is equipped with various control circuits.

When the above keyless unit is incorporated in a meter device such as a speedometer or tachometer of a vehicle, an antenna pattern forming a receiving circuit in the keyless unit, the code decoding circuit, various control circuits and the meter device. Wiring patterns forming various control circuits are mounted on the same substrate.

That is, in FIG. 4, for example, the wiring pattern of the meter device is formed on the right half portion of the substrate 1 and the wiring pattern of the keyless unit or the like is formed on the left half portion thereof. . Reference numeral 2 denotes a connector connecting portion integrally formed in a state of protruding outward from the outer peripheral edge of the substrate 1. As shown in detail in FIG.
A plurality of pattern end portions 3 of the wiring pattern that are directly contacted with the external connector are formed on the top. on the other hand,
Reference numeral 4 denotes an antenna pattern of a keyless unit formed near the outer peripheral edge of the substrate 1. The antenna pattern 4 avoids electrical connection with the pattern end 3 in the vicinity of the connector connecting portion 2. In order to obtain electrical connection, the jumper wire 5 is fixed with solder 6 at the cut portion.

[0005]

Since the conventional substrate 1 is constructed as described above, the impedance is increased by the connecting portion of the antenna pattern 4 by the jumper wire 5 and the solder 6 for fixing the jumper wire 5. However, there is a problem in that it becomes difficult to achieve the matching, and the performance as an antenna is significantly deteriorated.

The present invention has been made in order to solve the above problems, and by realizing a continuous antenna pattern of the same width, the antenna performance can be sufficiently ensured and the antenna pattern can be obtained. It is an object of the present invention to obtain a substrate 4 which is not short-circuited to the pattern end 3 of the wiring pattern when the connector is connected.

[0007]

The substrate according to the present invention comprises:
At least a wiring pattern whose end portion is connected to an external connector and an antenna pattern are arranged, and the wiring pattern end portion is extended from the wiring pattern to the connector connection portion, wherein the connector is provided. A hole is provided in the connection portion, the antenna pattern is arranged between the hole and the outer peripheral edge of the connector connection portion, and the antenna pattern continuous to the antenna pattern is more than the wiring pattern. The antenna pattern is arranged outside the substrate, and the antenna patterns are formed continuously over the entire length with the same or substantially the same width.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below. Embodiment 1. In FIG. 1, reference numeral 11 denotes a board according to the present invention. For example, the board 11 has wiring patterns for forming various control circuits of a meter device mounted on a vehicle in the right half portion and a keyless unit in the left half portion. Code decoding circuit,
Wiring patterns forming various control circuits are formed.

Reference numeral 12 denotes a connector connecting portion which is integrally formed so as to project outward from the outer peripheral edge of the substrate 11, the details of which are shown in FIG. In the connector connecting portion 12, a through hole 12a having a rectangular shape in plan view is formed, and
The external connector 1 is provided inside the board from the through hole 12a.
6, a plurality of pattern end portions 13 of the wiring pattern which are in direct contact with the wiring pattern 6 are formed, and an antenna pattern 14 which forms a receiving circuit of the keyless unit is formed outside the substrate from the pattern end portions 13 and the through holes 12a. ing. The antenna pattern 14 is continuously formed near the outer periphery of the substrate 11 with the same width. Therefore, the connector connecting portion 12 is bent in a convex shape in a plan view and the pattern end portions 13 are formed. Crossing over is avoided.

In addition, in FIG. 3, the substrate 11 has a housing 15
FIG. 6 is an enlarged cross-sectional view showing a state in which an external connector 16 is connected to the connector connection portion 12 after being incorporated therein.
The external connector 16 is integrally formed with a pair of upper and lower engaging portions 16a, and the engaging portion 16a allows the housing 15
At the time of this engagement, the connector terminal 16b inside the external connector 16 contacts the pattern end portion 13 over the antenna pattern 14 and the through hole 12a.

Here, the connector terminal 16b is biased to the front surface side of the substrate 11 on which the pattern end portion 13 is formed in order to ensure a good contact state with the pattern end portion 13. Therefore, when the external connector 16 is pushed into the housing 15, the tip of the connector terminal 16b first rides on the connector connecting portion 12 and then the through hole 1
The external connector 16 is temporarily fixed in the through hole 12a by being dropped into 2a, and the pattern end 13 and the connector terminal 16 are brought into complete contact with each other by further pushing in this state.

In the first embodiment, the case where the substrate 11 is applied to the meter substrate of the vehicle-mounted meter device has been described, but it is of course possible to apply it to other control devices.

[0013]

As described above, according to the present invention, since the antenna pattern 14 can be continuously formed with the same width, impedance mismatch can be avoided and the antenna performance can be improved. It can be secured well. In addition, when forming the antenna pattern 14, there is no need to perform work such as soldering jumper wires, so that the substrate can be easily obtained at low cost. Further, since the through hole 12a is provided in the connector connecting portion 12 of the substrate 11, a moderation sensation is generated when the external connector 16 is connected, and the connector terminal 16b is temporarily temporarily fixed to reach a complete contact state. Therefore, the complete connection of the external connector 16 can be easily confirmed.

[Brief description of drawings]

FIG. 1 is a schematic plan view of a substrate according to a first embodiment of the present invention.

FIG. 2 is a partially enlarged perspective view of FIG.

FIG. 3 is an enlarged cross-sectional view showing a state in which an external connector is connected to the connector connecting portion of the board according to the first embodiment of the present invention.

FIG. 4 is a schematic plan view showing an example of a conventional substrate.

FIG. 5 is a partially enlarged perspective view of FIG. 4;

[Explanation of symbols]

 11 substrate 12 connector connection portion 13 pattern end portion (wiring pattern) 14 antenna pattern 16 external connector

Claims (1)

[Claims] 1. A wiring pattern whose end is connected to an external connector and an antenna pattern are arranged at least, and the wiring pattern end is extended from the wiring pattern to the connector connection part. In the board, a hole is provided in the connector connecting portion, the antenna pattern is arranged between the hole and the outer peripheral edge of the connector connecting portion, and the antenna pattern continuous with the antenna pattern is formed by the A substrate characterized in that it is arranged closer to the outside of the substrate than the wiring pattern, and the antenna pattern is formed continuously over the entire length with the same or substantially the same width.