JPH11103209A - Radio wave reception equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the drop of reception sensitivity without limiting attachment to equipment by providing respectively independent antennas on the respective front, rear and bottom faces of a resin casing and permitting the selection of the respective antennas. SOLUTION: An antenna terminal on each face is terminated to a base part as the attaching face of a printed circuit board, and the contact conduction with the board is facilitated. Since the intensity of reception in all the directions can be secured by attaching the antennas in these three directions, the direction to attach radio wave reception equipment is not limited and at the time point when the attaching direction is determined, the selection of antennas is possible so as to provide the optimum reception sensitivity from respective antennas 201, 202 and 203. Then, the equipment can be assembled while setting the antenna terminals and printed circuit board terminals. The antennas 201, 202 and 203 using conductive members are not exposed on the surface of the resin casing but embedded in the resin casing except the contact part with the printed circuit board and the effect of reinforcement can be expected as well.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a housing structure of a product intended for radio wave reception, and more particularly to a housing structure of a radio wave receiving device with an antenna, such as a wireless door lock system for vehicle mounting and a security system.

[0002]

2. Description of the Related Art FIGS. 5A and 5B show a conventional radio wave receiving apparatus. FIG. 5A shows the appearance of the structure and the structure of an antenna mounting printed circuit board, and FIG. A printed circuit board 10 on which various electric components 6, connectors 12 and antennas 2 are mounted is housed in a housing 1 by screws 11. The electric wave received by the antenna 2 is transmitted to an electric circuit including the electric circuit components 6 in the printed circuit board.

In FIG. 5, 1 is a housing, 2 is an antenna,
Reference numeral 5 denotes an antenna holding component, 6 denotes an electric circuit component, 7 denotes a receiving strength, 10 denotes a printed board, 12 denotes a connector, and 30 denotes a mounting plate of a radio wave receiving device to the body.

[0004]

As described above, since the state of the printed circuit board 10 to which the antenna 2 is attached is fixed to one surface of the radio wave received by the antenna 2 in the related art, the reception intensity 7 is shown in FIG. As shown in FIG. 7B, the direction is limited, so that the mounting direction of the radio wave receiving apparatus is restricted, and the mounting space on a vehicle or the like is restricted. Further, the antenna 2 has a long linear shape, and has a drawback that it is difficult to perform an assembling operation, such as mounting the antenna 2 on a printed circuit board via the holding component 5 due to low rigidity of the antenna itself.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned drawbacks, and to provide good assemblability without being restricted by the mounting direction of the radio wave receiver.
An object of the present invention is to provide a radio wave receiver having a miniaturized resin structure.

[0006]

In order to achieve the above-mentioned object, the present invention provides an antenna for a radio wave receiving apparatus, in which independent antennas are provided on the front, side and bottom surfaces of a resin housing, respectively. , Antennas provided on each of the bottom surfaces can be selected. Also, the present invention
The resin housing and each of the antennas are provided integrally,
Further, one end of each of the antennas is formed to be exposed on the surface.

[0007] In the antennas on the front, side and bottom surfaces, the ends exposed on the surface of the resin housing are respectively assembled on the surface on which the printed circuit board is mounted, and one of the ends of the antenna is connected to the printed circuit board. And one of the plurality of conductive portions is arranged so as to be in contact with and conductive with one another. Further, the elastic rib provided at the end of each of the antennas may be in contact with a conductive portion of a printed circuit board in contact with the end, or the three-way terminal provided on each of the antennas may be in contact with the print terminal. The present invention is characterized in that the conductive portion of the substrate is in contact with the substrate via a pin.

[0008] Further, the antenna is characterized in that most of the antenna except one end is embedded in an insulating material and molded.

[0009]

Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is an external view of a radio wave receiving apparatus according to one embodiment of the present invention,
FIG. 2 is an external view of a resin housing, FIG. 3 is an exploded view of the resin housing, and FIG. 4 is a contact diagram of an antenna terminal portion and a printed circuit board showing an embodiment of the present invention. Note that the same components as those in FIG. 5 are denoted by the same reference numerals, and description thereof will be omitted.

1 to 4, this embodiment is an example in which the present invention is applied to a radio wave receiving device of a wireless door lock system for mounting on a vehicle. The resin housing of the device has independent antennas 201, 20 on the front, side, and bottom, respectively.
2, 203, and each antenna 201, 202, 20
Conductive terminal portions (three-way terminals 13 or ribs 15) provided at one end exposed from the resin housing of No. 3 are gathered on the bottom portion to facilitate mounting contact with the printed circuit board 10. Each of the antennas 201, 202, and 203 is set in a mold at the time of injection molding using a conductive member that is a metal wire having a required length, shape, and material, and is molded into a resin housing.

Printed circuit board 1 on which electric circuit components 6 are mounted
Reference numeral 0 denotes a conductive portion for antenna connection,
1 secures the boss 17 of the housing 1. Each of the metal wire antennas 201, 202, and 203 is
When assembled into the housing 1, as shown in FIG. 4, the three-way terminal 13 (or rib 15), which is a conductive terminal portion of the antenna,
Then, the pin 14 (or the conduction pattern 16) fixed to the conductive portion for antenna connection of the printed circuit board 10 by soldering or the like is inserted into contact (or crimp contact).

As described above, only the end of one of the antennas 201, 202, and 203 that provides the optimum reception sensitivity and one of the conductive portions for antenna connection of the printed circuit board 10 corresponding to this end are described above. By making an appropriate insertion contact (or crimp contact), an antenna to be used for reception can be selected. The radio wave from the antenna thus selected is received via the electric circuit composed of the electric circuit components 6 of the printed circuit board 10.

FIG. 3 shows each of the antennas 201, 202, and 203.
FIG. 1 is a development view showing a state in which is molded on the front, side, and bottom surfaces of the resin housing 1. The antenna terminal on each side is printed circuit board 1.
It gathers on the bottom surface, which is the mounting surface of No. 0, to facilitate contact conduction with the substrate. By installing the antenna in these three directions, it is possible to secure the reception strength from all directions,
The antennas 201, 202, and 203 are not restricted by the mounting direction of the radio wave receiving device, and are determined at the time of determining the mounting direction.
Therefore, it is possible to select an antenna that provides the optimum reception sensitivity, and set the antenna terminal and the printed circuit board terminal to complete the assembly.

FIG. 4A is a diagram showing the first embodiment. FIG. 4A is a view showing a first embodiment, in which a three-way terminal 13 which is a conductive terminal portion of an antenna and a pin 14 of a conductive portion for antenna connection of the printed circuit board 10 are provided. The cross-sectional view of the vicinity and this figure (b) are views showing the second embodiment, in which an elastic rib 15 is used as a conductive terminal part of the antenna, and a notch is formed in the conductive part for antenna connection of the printed circuit board 10. The conductive patterns 16 are provided with springs, each of which has a spring property to reduce the influence of the difference in dimensional accuracy of each member so that reliable conduction can be obtained. still,
As shown in the figure, the antenna 2 and the rib 15 are integrated.

Antennas 201 and 20 using conductive members
2, 203 are not exposed on the surface of the resin housing, but are embedded in the resin housing 1 except for a portion that is in contact with the printed circuit board 10, and when the conductive member is a metal wire in particular, the resin housing 1 can be expected to be effective.

[0016]

As described above, according to the present invention, the most suitable antenna can be selected according to the state in which the radio wave receiving device is mounted without being restricted by the mounting of the radio wave receiving device on the airframe. It can be expected that the reception sensitivity will not be reduced. Further, since the antenna is formed integrally with the housing, a holding component for fixing the antenna to the substrate is not required, and the number of components and the mounting operation are reduced. Since it is not necessary to mount the antenna on the board, the space inside the housing is widened, and the assembling work of other parts is facilitated, so that there is an effect that the size and cost of the radio wave receiver can be reduced.

Further, since the antenna is molded by being embedded in the resin housing, an effect of reinforcing the resin housing against breakage and loss can be expected.

[Brief description of the drawings]

FIG. 1 is an external view of a radio wave receiving apparatus according to an embodiment of the present invention.

FIG. 2 is an external view of a resin housing showing an embodiment of the present invention.

FIG. 3 is a development view of a resin housing showing an embodiment of the present invention.

FIG. 4 is a diagram illustrating a contact state between an antenna terminal portion and a conductive portion of a printed circuit board according to an embodiment of the present invention.

5A and 5B are explanatory views showing a conventional radio wave receiving apparatus, in which FIG. 5A is a structural external view of a radio wave receiving apparatus and a structural view of a printed circuit board, and FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Housing | casing 2 ... Antenna 201 ... Side antenna 202 ... Back antenna 203 ... Bottom antenna 5 ... Holding component 6 ... Electric circuit components 7 ... Reception strength 10 ... Printed circuit board 11 ... Screws 12 ... Connector 13 ... Sleep terminal 14 ... Pin 15 ... Rib 16 ... Conduction pattern 17 ... Boss 20 ... Mounting base −S 30 ・ ・ ・ Attachment plate for radio wave receiver to the body

Claims (5)

[Claims] 1. A front face, a side face, and a resin casing of a radio wave receiving device.
An electric wave receiving apparatus, wherein an independent antenna is provided on each of the bottom surfaces, and the antennas provided on each of the front surface, the side surface, and the bottom surface can be selected. 2. The antenna according to claim 1, wherein the resin housing and each of the antennas are provided integrally, and one end of each of the antennas is formed to be exposed on the surface. 2. The radio wave receiving device according to 1. 3. An antenna on each of front, side and bottom surfaces, the ends exposed on the surface of the resin housing are respectively assembled on a surface on which a printed circuit board is mounted, and one of the ends of the antenna is connected to the printed circuit board. 3. The radio wave receiving apparatus according to claim 2, wherein one of the plurality of conductive parts is arranged so as to be in contact with and conductive. 4. An elastic rib provided at an end of each of the antennas and a conductive portion of a printed circuit board in contact with the end, or a three-way terminal provided on each of the antennas And the conductive portion of the printed circuit board,
The radio wave receiving device according to claim 3, wherein the radio wave receiving device is in contact with the terminal via a pin. 5. The radio wave receiving apparatus according to claim 1, wherein the antenna is formed by embedding most of the antenna except one end thereof inside an insulating material.