JPH11131880A - Receiver - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the receiving performance by arranging a receiver on the arm of a room mirror installed on the forward ceiling a cabin. SOLUTION: A room mirror is held on the other end of an arm having one end installed to a mirror base installed in the forward ceiling within a cabin in such a manner that the angle is vertically and laterally adjustable, and the case of a receiver is installed to the arm of the room mirror. The mounting position of the receiver is set to a lower position 32. When an infrared signal is transmitted from a transmitter 33 to the receiver through a window in the locking or unlocking of a door from the lateral direction of a vehicle in a height of about 1 m from the road surface where an operator can easily operate the receiver, a range L2 can be provided by the dead angle 34 by the difference in height between the upper end of the window and the receiver, and the receiving performance can be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a receiver mainly used for an infrared keyless door lock system of an automobile.

[0002]

2. Description of the Related Art In an infrared keyless door lock system for transmitting and receiving infrared rays from a transmitter outside a vehicle to lock and unlock a door of a vehicle, a receiver for receiving infrared rays from the transmitter is a part of the vehicle shown in FIG. As shown in a sectional side view, a receiver 1 is generally mounted in front of a ceiling 2 of an automobile having good light receiving performance. Such a conventional receiver will be described with reference to FIGS. I do.

FIG. 9 is a side sectional view of a conventional receiver, and FIG.
FIG. 1 is an exploded perspective view of the same. In FIG. 1, reference numeral 3 denotes a mirror base mounted in front of a ceiling 2 in a vehicle interior, 4 denotes a room mirror, and the room mirror 4 is an arm having one end mounted on the mirror base 3. 5 is held at the other end so that the angle can be adjusted vertically and horizontally.

Reference numeral 6 denotes a resin case mounted on the mirror base 3 by locking means such as screws or locking claws.
Is a wiring board held on the lower surface of the case 6 by screws 8, and 9 and 10 are light receiving elements such as pin photodiodes, which are arranged on the lower surface of the wiring board 7 in the left-right direction of the vehicle. Are the light receiving elements 9 and 10
In addition, a signal processing circuit for receiving and processing an infrared signal by mounting electronic components such as a microcomputer is formed.

[0005] Reference numeral 11 denotes a wiring board 7 and light receiving elements 9 and 1.
The lens 11 is an infrared-transmitting lens that also serves as a cover for covering the lens 6 and is attached to the case 6 by its claw-like legs 11A.
Is a connector connected to a door control unit (not shown) of the electric circuit of the vehicle, and is connected to the wiring board 7 by a flexible lead wire 13 passing through the hole 6A of the case 6.

In the conventional receiver constructed as described above, when an identification code is transmitted as infrared light from a receiver (not shown) outside the vehicle by a light emitting diode, the light receiving element 9 or 10 receives the infrared code. Thereafter, a signal processing circuit formed on the wiring board 7 performs signal processing, and outputs a coincidence signal when the signal matches the identification code stored in advance, or demodulates the transmitted signal as it is, and And output to a door control unit (not shown) of the electric circuit of the vehicle through the
It was configured to lock and unlock the door of an automobile.

[0007]

However, in the above-mentioned conventional receiver, the mounting position of the receiver 1 is changed to the ceiling 2.
When the door is locked or unlocked from the side of the vehicle due to the difference in height between the upper end of the window of the vehicle and the surface of the ceiling 2, the transmitter outside the vehicle transmits the signal to the receiver 1 through the window. The blind spot increases, the working range in the height direction is narrow, the working distance is short, the receiving performance is poor, and other additional devices such as the room mirror 4 and the room lamp of the receiver 1 are mounted near the mirror base 3. There was a problem that it was difficult.

If the receiver 1 is mounted at a position below the rearview mirror 4 which is lower than the surface of the ceiling 2, the operating range is wide and the usability is improved, but the processing of the lead wires 13 connected to the electric circuit of the vehicle is difficult. In addition, when the receiver 1 is installed below the rear-view mirror 4, there is a problem that appearance is poor and visibility is impaired when driving a car.

An object of the present invention is to solve such a conventional problem, and an object of the present invention is to provide a receiver which has a wide operating range in the front-rear and left-right directions of a vehicle, is easy to use, and has a good external appearance. Is what you do.

[0010]

In order to solve the above-mentioned problem, a receiver according to the present invention is configured such that the receiver is arranged on an arm of a room mirror mounted on a ceiling in front of a vehicle compartment.

As a result, the operating range of the vehicle in the front-rear and left-right directions is widened, so that a receiver having good usability and good appearance can be obtained.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS According to the first aspect of the present invention, a case mounted on an arm of a rearview mirror mounted on a ceiling in front of a vehicle cabin of a vehicle, and an infrared signal mounted on the case is received. A wiring board provided with a light receiving element and a signal processing circuit, a lens which is made of infrared-transmissive resin, is also used as a cover and covers the wiring board, and transmits a signal from the signal processing circuit to the vehicle side. A mirror base that has a wide operating range in the height range, a long working distance, good reception performance, and a good external appearance. This has an effect that another additional device such as a room lamp can be attached in the vicinity.

According to a second aspect of the present invention, in the first aspect of the present invention, the receiver is mounted on the vehicle compartment side of the arm, and light, such as sunlight, which becomes noise enters the light receiving element. Therefore, it is possible to improve the reception state of the infrared signal from the transmitter.

According to a third aspect of the present invention, in the first or second aspect of the present invention, a positioning portion is provided at one end of the case, and a screw mounting hole is provided at the other end of the case. It is designed to be mounted using a single screw, so positioning at the time of mounting is easy and the workability of mounting can be improved, and it has the effect that displacement and detachment due to vibration etc. after mounting are unlikely to occur .

According to a fourth aspect of the present invention, in the first aspect of the present invention, the two light receiving elements are arranged so that a light receiving surface faces a front-rear direction of the vehicle. This has the effect that the operable range in the front-rear direction of the vehicle can be widened and a receiver having good reception performance can be obtained.

According to a fifth aspect of the present invention, in the fourth aspect of the present invention, the two light receiving elements are mounted so that the light receiving surfaces thereof are perpendicular to the road surface, and are widest in the front-rear direction of the vehicle. This has the effect that a receiver having an operating range can be obtained.

Hereinafter, an embodiment of the present invention will be described with reference to FIG.
This will be described with reference to FIGS. The same components as those described in the section of the related art are denoted by the same reference numerals, and detailed description will be omitted.

(Embodiment 1) FIG. 1 is a side sectional view of a receiver according to a first embodiment of the present invention, and FIG. 2 is an exploded perspective view of the receiver. In FIG. A mirror base 4 mounted in front of the mirror base 4 is a room mirror. The room mirror 4 is held at the other end of the arm 21 having one end mounted on the mirror base 3 so that the angle can be adjusted vertically and horizontally.

The arm 21 is wider at one end of the mirror base 3 and narrower toward the room mirror 4 at the other end.
A screw hole 21B is formed substantially at the center.

Reference numeral 22 denotes a case having an engagement projection 22A corresponding to the engagement recess 21A of the arm 21 and a screw hole 22C corresponding to the screw hole 21B. Is fixed to the arm 21 by being screwed into the screw holes 22C and 21B after being engaged with the engagement concave portion 21A.

Reference numeral 24 denotes a wiring board held on the lower surface of the case 22 by screws 25. Reference numerals 26 and 27 denote light receiving elements such as pin photodiodes. Placed on the bottom,
In addition to the light receiving elements 26 and 27, electronic components such as a microcomputer are mounted on the wiring board 24, and a signal processing circuit for receiving an infrared signal is formed.

Reference numeral 28 denotes the wiring board 24 and the light receiving element 2
An infrared-transmissive lens that also serves as a cover for covering 6 and 27, is attached to the case 22 by a claw leg 28A, and 29 is connected to a door control unit (not shown) of an electric circuit of the vehicle. Case 22
Is connected to the wiring board 24 by a flexible lead wire 30 passing through the hole 22B.

The operation of the thus configured receiver of the present embodiment is the same as that described in the related art, and thus the description thereof is omitted.

As described above, in the present embodiment, the case 22 of the receiver is mounted on the arm 21 of the rear-view mirror 4, and as shown in FIG. In contrast to the ceiling surface 31 in the case of the technology, in the case of the present embodiment, the vehicle is installed at the lower position 32, so that the operator can easily operate the transmitter at a height of about 1 m from the road surface. When an infrared signal is transmitted from the transmitter 33 to the receiver through the window when the door is locked or unlocked from the lateral direction, the vehicle 35 receives L1 from the vehicle 35 due to the blind spot 34 caused by the difference between the height of the window and the height of the receiver. Compared to the conventional case where the arrival distance L2 is limited to the arrival distance L2
Can be obtained, and the reception performance can be improved.

Further, since the lens 28 of the receiver is installed on the lower surface side of the arm 21 which is the interior side of the vehicle, sunlight 36 which easily generates noise in the receiver is exposed to the windshield 3.
7 does not directly hit the light receiving elements 26 and 27 even if the light enters through the receiver 7, and the receiving state of the receiver can be maintained in a good state.

By adopting the configuration of the present embodiment as shown in the external perspective view of the receiver in FIG. 4, the receiver of the mirror base unit described in the section of the prior art is mounted at the place where the receiver is mounted. Further, a room lamp 40 including a lamp (not shown), a switch 38, and a cover 39 can be integrally installed.

At this time, the lead wire 30 for transmitting the signal from the receiver to the electric circuit of the vehicle is routed inside the cover 39 of the room lamp 40 arranged so as to cover the case 22, so that the lead wire 30 Even if the number is as large as a power line, a signal line, a ground line, etc., it can be configured so as not to be seen from the outside at all, and the shapes of the receiver and the room lamp are also configured according to the width of the arm 21. Thereby, since there is a sense of unity when viewed from the windshield 37 side and the vehicle interior side, the external appearance of the receiver and the room lamp can be improved.

Further, in this embodiment, the engaging portion for mounting the arm 21 and the case 22 is constituted by the engaging concave portion 21A of the arm 21 and the engaging convex portion 22A of the case 22. Of course, the opposite is also possible,
The mounting screw 23 is provided outside the lens 28 so that the case 2
2 together with the arm 21 by screwing.

(Embodiment 2) FIG. 5 is a plan view of a wiring board which is a main part of a receiver according to a second embodiment of the present invention.
FIG. 6 is a side view of the same.

As shown in the figure, the two light receiving elements 42 and 43 mounted on the wiring board 41 are connected to the light receiving surface 4 of the light receiving element 42 in accordance with the state in which the receiver is actually mounted on the vehicle.
2A in the forward direction of the vehicle, the light receiving surface 43A of the light receiving element 43
Are arranged back-to-back toward the rear direction B of the vehicle, and are regulated by the holder 44 so as to be perpendicular to the road surface c.

The holder 44 has two elastic claws 44A and 44B having different widths.
It is inserted and held in the holes 41A and 41B of the wiring board 41 corresponding to 44B, and can be assembled without making a mistake in the front-rear direction at the time of insertion.

Further, the light receiving elements 42 and 43 are
By mounting the light receiving elements 42 and 43 in the predetermined direction without forming the terminals of the light receiving elements 42 and 43, the workability is good.

According to the present embodiment, the light receiving surfaces 42A, 43A of the light receiving elements 42, 43 are arranged back-to-back in the front-rear direction of the vehicle, so that the receiver has a wide operating range in the front-rear direction of the vehicle. In the lateral direction of the vehicle, the Sado range is slightly narrower than that of the conventional receiver. However, in general, the directional characteristics of the light receiving elements 42 and 43 such as pin photodiodes can be obtained even at an incident angle of 60 °. It has a light receiving sensitivity of about 0.5 times the light receiving sensitivity of the front, and a working distance of about 3 m from the receiver can be obtained in the left and right direction, so that the working distance that does not hinder actual use is Can be secured.

FIG. 7 is a top view of a vehicle showing a general working distance of a receiver used in an infrared keyless door lock system, where 45 is the working distance of the receiver according to the prior art, and 46 is the present invention. The working distance of the receiver according to the first embodiment is shown, and the working distance 46 is particularly improved in the blind spot in the lateral direction.

Further, reference numeral 47 denotes the working distance of the receiver according to the second embodiment of the present invention. The working distance in the front-rear direction is greatly improved as compared with the receiver according to the prior art, and the working distance in the horizontal direction is improved. It can be seen that the working distance of the receiver according to the conventional technique can be ensured even with the minimum value, so that a wide range of working distance can be obtained as a vehicle.

As described above, according to the present embodiment, a wide-range working distance with respect to a vehicle can be obtained, so that a receiver that is easy to use can be obtained.

[0037]

As described above, according to the present invention, the working range of the vehicle in the front-rear and left-right directions is widened, and the receiver is easy to use. is there.

[Brief description of the drawings]

FIG. 1 is a side sectional view of a receiver according to a first embodiment of the present invention.

FIG. 2 is an exploded perspective view of the same.

FIG. 3 is a side view showing a working distance of the receiver.

FIG. 4 is an external perspective view of a receiver showing a state where a room lamp is mounted.

FIG. 5 is a plan view of a wiring board as a main part of a receiver according to a second embodiment of the present invention.

FIG. 6 is a side view of the same.

FIG. 7 is a top view showing a working distance of a receiver used in the infrared keyless door lock system.

FIG. 8 is a partial cross-sectional side view of a vehicle equipped with a receiver.

FIG. 9 is a side sectional view of a conventional receiver.

FIG. 10 is an exploded perspective view of the same.

[Explanation of symbols]

 Reference Signs List 3 mirror base 4 rearview mirror 21 arm 21A engaging concave portion 21B, 22C screw hole 22 case 22A engaging convex portion 22B hole 23 screw 24 wiring board 25 screw 26, 27 light receiving element 28 lens 28A claw leg 29 connector 30 lead Line 31 Roof (ceiling) surface 32 Lower position 33 Transmitter 34 Blind spot 35 Vehicle 36 Sunlight 37 Front glass 38 Switch 39 Cover 40 Room lamp 41 Wiring board 41A, 41B Hole 42, 43 Light receiving element 42A, 43A Light receiving surface 44 Holder 44A, 44B Elastic claws 45 Working distance of the receiver according to the prior art 46 Working distance by the receiver of the first embodiment 47 Working distance by the receiver of the second embodiment

Claims (5)

[Claims] 1. A case mounted on an arm of a rearview mirror mounted on a ceiling in front of a cabin of a vehicle, a wiring board provided with a light receiving element for receiving an infrared signal and a signal processing circuit mounted on the case, A receiver for a keyless door lock system, comprising a lens which is also made of an infrared-transparent resin and is held by the case so as to cover the wiring board and serves as a cover, and a connector for transmitting a signal from the signal processing circuit to a vehicle side. 2. The receiver according to claim 1, wherein the receiver is mounted on a vehicle side of the arm. 3. The case according to claim 1, wherein a positioning portion is provided at one end of the case, and a hole for screw mounting is provided at the other end, and the arm is mounted using one screw. Receiver. 4. The receiver according to claim 1, wherein the two light receiving elements are arranged so that the light receiving surfaces face the front-back direction of the vehicle. 5. The receiver according to claim 4, wherein the two light receiving elements are mounted so that a light receiving surface is perpendicular to a road surface.