JPH07333320A - Microwave detector - Google Patents

Abstract

PURPOSE:To apply a single microwave detector for both automobile and motor cycle. CONSTITUTION:First and second window parts 12 and 13 are respectively prepared on the front 10a and ceiling 10b of a main body 10 incorporated with an antenna 11, and a tiltable reflection plate 15 is provided at the specified position inside the main body. The plate 15 is tilted at 45 deg. at all times by a twisting coil spring and receives a radar wave entering from the second window part. When 5 the main body in such a state is put upright into the chest pocket of motor cycle driver, the second window part faces ahead, being ready for detection. When a bracket 20 is attached to the main body, a projection 21 pushes up a projecting piece 18 integrated to the reflection plate, so the reflection plate is turned and becomes horizontal, and a radar wave entering from the first window part is received by the antenna. When the main body in such a state is set horizontally at a specified position inside an automobile, the first window part faces ahead, being ready for detection.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a microwave detector.

[0002]

2. Description of the Related Art Conventionally, various microwave detectors mounted on an automobile to detect a specific microwave (radar wave) existing around the automobile and a radar wave emitted toward the automobile have been conventionally known. Are being developed. Then, the installation place is directly placed on the dashboard in the car (fixed with adhesive tape etc. if necessary), microwave detection by using a predetermined mounting jig for the dashboard and sun visor. Attach the container so that it has the specified posture and orientation. Specifically, in any type, since the receiving unit 1 of the antenna needs to be oriented in the emission direction of the radar wave, when the receiving unit 1 is provided on the front surface of the flat body 2, Is arranged horizontally on the dashboard 3 (see FIG. 10A).

On the other hand, when it is attempted to use the above microwave detector in a motorcycle, it is difficult to attach it to the motorcycle because of the structure of the vehicle body. It is conceivable to receive and detect the radio wave of. However, when the microwave detector having the above-described configuration (the type in which the receiving portion is provided on the front surface of the flat body) is housed in the chest pocket 4, as shown in FIG. Faces upward (downward if inserted in the opposite direction), so the detection sensitivity to electric waves from the front decreases (substantially undetectable). Further, although the rider in the vehicle takes a forward leaning posture, the microwave detector cannot be positioned horizontally so that the rider can still mount the vehicle.

Therefore, from the viewpoint of the receiving sensitivity of the antenna, it has been difficult to share a single microwave detector for automobiles and motorcycles. Therefore, it is necessary to manufacture a microwave detector for each application, which is not only complicated and costly, but also for users who use both automobiles and motorcycles. You will have to prepare things.

The present invention has been made in view of the above background, and an object of the present invention is to solve the above problems and apply it to both an automobile and a motorcycle with a single microwave detector. It is also possible to perform the switching process between the case of applying to the car concerned and the case of applying to the motorcycle easily and surely, there are few malfunctions, and the reception sensitivity can be adjusted relatively easily, which is optimum. Another object of the present invention is to provide a microwave detector which is easy to obtain various receiving sensitivities, is small in size, and has a good mounting workability.

[0006]

To achieve the above object, in a microwave detector according to the present invention, a predetermined shape is provided on a front surface and a top surface of a flat body having an antenna and a predetermined signal processing circuit built therein. First and second windows through which microwaves can pass are provided, and a reflector is movably provided on the path of the microwaves incident from the second window formed on the top surface. Then, by setting the reflection plate at a predetermined angle position, the microwave incident from the second window is irradiated on the reflection plate, the course of the microwave is changed, and the microwave is received by the antenna. By moving the reflecting plate to a predetermined position, the microwave incident from the first window portion goes straight without being blocked by the reflecting plate and is received by the antenna. The positional relationship of each part was adjusted.

[0007] Preferably, the mechanism for moving the reflecting plate is arranged to apply the microwave incident from one of the first window part and the second window part while the reflecting plate is unloaded. An elastic means to be set at one position for guiding to the antenna, and an elastic means for attaching to the main body to directly or indirectly urge the reflecting plate to elastically deform the elastic means to the other position. It is composed of an operation member to be moved to. Further, the elastic means is preferably composed of a spring.

Further, the movement of the reflection plate may be rotated within a predetermined angle range between a position where the reflection surface of the reflection plate is substantially parallel to the main body and a position where the reflection surface is inclined by a predetermined angle. Of course, in such a case, it is more preferable that the tilt angle of the reflection plate with respect to the main body can be adjusted by changing the biasing amount of the reflection plate by the operation member.

Further, on the premise of each of the above-mentioned constitutions, the operating member is formed in a clip shape, and when the operating member is mounted on the main body, the microwave incident from the second window portion is reflected by the reflecting plate. It may be reflected and received by the antenna.

[0010]

By moving the reflecting plate, the microwave incident from the first window portion and the microwave incident from the second window portion can be selectively received by the antenna. Since the first and second windows are formed on different surfaces of the main body, the microwaves coming from the two different directions with respect to the main body can be easily changed by switching the position of the reflecting plate. Corresponding to and received.

Therefore, for example, in the case of installation in an automobile, a flat main body is installed horizontally at a predetermined position in the vehicle body, and the first window portion is arranged to face the path of the microwave to be detected. In this state, the reflecting plate is moved as necessary to a position where it does not block the path of the microwave incident from the first window portion. Thereby, it becomes a microwave detector for automobiles.

On the other hand, when it is used in a motorcycle, the reflector is set at a position different from that described above so that the microwaves incident from the second window can be received by the antenna. Then, the main body is stored in the chest pocket of the driver (rider) or the like with the second window facing forward. Then, when the microwave to be detected comes from the front toward the motorcycle, since the second window portion is arranged to face the path of the microwave, it is directly incident on the main body and then the reflector plate It is reflected at and received by the antenna. Thereby, it becomes a microwave detector for a motorcycle. Then, at this time, if the operating member has a clip shape as in the sixth aspect, even if the chest pocket is too small to store the main body, the operating member is securely attached to the front side of the rider.

Further, according to the second and third aspects, the reflecting plate is biased in the predetermined direction by the elastic restoring force of the elastic means and is positioned at the predetermined position. Then, the microwave incident from one of the first and second windows is received by the antenna. That is, the incident microwave from one side can be detected in a stable state without using a separate member for maintaining the attitude of the reflector. The incident microwaves from the other window can be dealt with by moving the elastic means while elastically deforming the elastic plate by urging the reflecting plate in a predetermined direction by the operating member. Further, since the elastic member is thus elastically deformed, when the operation member is removed from the main body, the elastic restoring force of the elastic means restores the original state. Therefore, the position of the reflection plate can be easily switched by attaching and detaching the operation member.

Further, when the reflecting plate is rotationally moved (claim 4), by horizontally positioning the reflecting plate, the course of the microwaves incident from the first window portion is not easily cut off. Even if the receiving surface of the antenna is widened, it is not necessary to enlarge the main body. (When the reflector is slid and moved, a region for the reflector to escape is required in the moving direction. The size will be increased as much as the escape area is secured).

Further, if the movement of the reflector is rotational, the reflector can be stopped at an arbitrary angle by the structure of claim 5, and the light is incident from the second window. Adjusting the angle of the reflector according to the incident angle of the microwave improves the receiving sensitivity.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of the microwave detector according to the present invention will be described in detail below with reference to the accompanying drawings. FIG. 1 shows a first embodiment of a microwave detector according to the present invention.
As shown in the figure, a flat antenna 11 is mounted in a flat and hollow main body (housing) 10. Then, at least the front surface 10a of the main body 10 is formed with a first window portion 12 through which a radar wave, which is a microwave, can be transmitted. Are adjusted to be arranged. Although not shown, a signal processing circuit for detecting a predetermined radar wave received by the antenna 11 and warning the user via a predetermined output medium is built in the main body 10. The output medium may be one that uses hearing such as a buzzer or voice, or one that uses vision such as a lamp or LED, but at least considering the application to motorcycles, the hearing is used. It is necessary to have things installed (visual things may be used together). The antenna 11 and the signal processing circuit are
Since a conventionally known one can be used as it is, its detailed description is omitted.

Here, in the present invention, the top surface 10b of the main body 10 is
Second window part 1 through which radar waves can be transmitted to a predetermined position in front of
3 is formed so that radar waves can enter the main body 10 not only from the front side of the main body 10 but also from the top surface 10b side. Further, a retractable reflector 15 is provided in the course of the radar wave that has passed through the second window 13 and entered. In this example, as shown in FIG. 3A, the reflector 15 has a first angle of about 45 degrees with the bottom surface 10c of the main body 10.
At least two positions in the second state in which the angle between the state and the bottom surface 10c of the main body 10 shown in FIG.

In the first state, the radar wave incident from the second window portion 13 is applied to the reflection plate 15 and reflected there, and its course is changed by 90 degrees, and the reception portion 11a of the antenna 11 receives the radar wave. In the second state, in the second state, the reflection plate 15 does not exist on the path of the radar wave that has entered from the first window portion 12, and it goes straight on and enters the receiving portion 11a of the antenna 11, The positional relationship of each part is adjusted.

In this example, the switching between the first state and the second state is performed by the mechanism shown below. That is, first, as shown in an enlarged manner in FIGS.
One of the long sides of is attached to the shaft 16 so that the shaft 16 rotates about a predetermined angle range.
A torsion coil spring 17 as an elastic means is provided in the middle of the shaft 16, one end 17a of the torsion coil spring 17 is brought into contact with the bottom surface 10c of the main body 10, and the other end 17b of the torsion coil spring 17 is provided. Is brought into contact with the back surface side of the reflection plate 15. And this torsion coil spring 17 is
Due to the self-elasticity restoring force, a force is constantly applied in the direction in which both ends 17a and 17b are opened. Therefore, in the normal state, as shown by the solid line in FIG.
The inclination state (first state) is maintained.

Two projecting pieces 18, 18 are integrally formed on the opposite side of the reflecting plate 15 with the shaft 16 interposed therebetween.
It is adapted to rotate with the rotation of the reflection plate 15. Then, the bottom surface 1 of the main body 10 facing the protruding piece 18
0c has through holes 19 and 19 formed therein.

On the bottom face 10c side of the main body 10, a bracket 20 having a predetermined shape as an operating member is detachably attached. A protrusion 21 is formed at a predetermined position on the top surface of the bracket 20, and the protrusion 21 forms the through hole 19 when the bracket 20 is mounted on the main body 10.
It is set so as to pass through the inside of the main body 10 and come into contact with the projecting piece 18 so as to urge (push up) it. As a result, when the bracket 20 is attached, the projecting piece 18 is pushed up as shown in FIG.
Is rotated clockwise about the shaft 16 to be in the horizontal position (second state) indicated by the chain double-dashed line in the figure. In other words, the height of the protrusion 21 (the amount by which the protrusion 18 is pushed up) is set so as to be in the second state when the bracket 20 is completely mounted.

Further, on the side surface of the bracket 20, a locking piece 22 having a locking projection 22a on its inner surface is formed upright, and the locking projection 22a is formed at a predetermined position on the outer side surface of the main body 10. It fits in the groove (not shown) to maintain the mounted state. Furthermore, the bracket 20
A handle portion 23 is formed on the lower surface of the body 10. When removing the bracket 20 attached to the main body 10, the handle portion 23 is held and pulled in a predetermined direction so that the locking projection 22a and the main body 10 are attached to each other. This is done by releasing the engagement with the formed groove.

Next, the operation of this embodiment will be described.
First, when used for a motorcycle, only the main body 10 is used without mounting the bracket 20. Then, as shown by the solid line in FIG.
Since the posture of No. 5 is in the first state, the second window portion 13
The radar wave incident from is received by the antenna 11. Therefore, as shown in FIG. 4 and FIG.
When 0 is inserted into the chest pocket 24 of the rider so that the second window 13 faces forward, the radar wave emitted toward the motorcycle passes through the second window 13 from the chest pocket and passes through the main body 10. Since it is incident on the inside, the signal processing circuit detects the radar wave via the antenna 11 and outputs a predetermined signal.

In the embodiment described above, the angle formed by the reflection plate 15 with respect to the bottom surface 10c of the main body 10 in the first state is set to 45 degrees, so that the upper surface 10a of the main body 10 (second
It has the highest sensitivity to the radar wave incident from the direction orthogonal to the window 13).
Therefore, in order to increase the sensitivity, the rider needs to drive with at least the upper half of the body standing upright, but in actual driving, the chest pocket 2 shown in FIGS.
In many cases, as shown in FIG.

Therefore, as shown in the figure, it is preferable to appropriately adjust the angles θ1 and θ2 formed in the first state. And the adjustment concerned may adjust the angle of both ends 17a and 17b in the unloaded state of the torsion coil spring 17,
Alternatively, the relative formation position of the through hole 19 with respect to the projecting piece 18 is appropriately set, and by setting the projecting piece 18 in contact with the side surface of the through hole 19, the reflecting plate 15 is set so as not to open further. However, various methods can be adopted. Further, the angles θ1 and θ2 are made horizontal from the front depending on the position of the reflection plate 15 as shown in the drawing, that is, when the reflection plate 15 is moved up / down when it is inserted into the chest pocket 25. Since the incident angle of the incoming radar wave into the main body 10 is different, it is desirable to change θ1 and θ2 accordingly.

On the other hand, when used for automobiles,
It is used with the bracket 20 attached to the main body 10.
Then, as described above, as shown by the alternate long and two short dashes line in FIG. 1 (B) and FIG. 3, the reflector 15 is in the second state,
The radar wave incident from the first window 12 is transmitted to the antenna 1
1 will be received.

Therefore, as shown in FIGS. 6 to 8, predetermined mounting jigs 26, 27, 28 are connected to the bracket 20,
It is attached to a predetermined position on the vehicle body through the attachment jigs 26 to 28. That is, in the case of FIG. 6, a suction cup type attachment jig 26 is used to suck and hold the front window 29 of the vehicle body. Further, in the case of FIG. 7, an adhesive tape type attachment jig 27 is used to adhere and hold it to the upper surface of the dashboard 30 of the vehicle body. Further, in the case of FIG. 8, a clip type attachment jig 28 is used to sandwich and hold the sun visor 31. The connection parts 26a to 28a between the mounting jigs 26 to 28 and the bracket 20 are rotatable and can be adjusted so that the main body 10 is horizontal. The specific mounting mechanism of the main body 10 to the vehicle body is not limited to that shown in the figure, and it goes without saying that various forms can be used.

In the above-mentioned embodiment, when used for a motorcycle, the reflection plate 15 was used at a predetermined reference angle (θ, θ1, θ2) without mounting the bracket 20, but For example, a plurality of auxiliary brackets having different heights of the protrusions 21 of the bracket 20 are prepared, and even when it is used in a motorcycle, an auxiliary bracket having a protrusion with a low height is attached, and only a predetermined angle (small angle) from a reference angle is set. You may try to defeat it. Thereby, the angle of the reflector 15 can be changed, so that the user can adjust the angle (posture) of the reflector 15 according to his / her driving posture so that the receiving sensitivity becomes optimum.

FIG. 9 shows a second embodiment of the present invention.
In the above-described first embodiment, the radar wave incident from the second window portion 13 is reflected by the reflection plate 15 and received by the antenna 11 in a steady state without the bracket 20 attached. On the contrary, as shown in FIG. 3A, the reflector 15 is parallel to the bottom surface 10c of the main body 10 in a steady state so that the radar wave incident from the first window portion 12 can be received by the antenna portion 11. I have to. Therefore, by installing the main body 10 at a predetermined position on the vehicle body using a predetermined mounting jig or the like, it can be used for an automobile.

Also in this embodiment, the reflector 15 is similar to the first embodiment in that the reflector 15 is rotatable about the shaft 16, but the torsion coil spring 17 'is reflected from the bottom surface 10c of the main body 10. It differs from the first embodiment in that it is bridged to the front surface side of the plate 15. Further, in this embodiment,
A projecting piece 18 ′ is provided so as to project below the shaft 16. Then, as shown in FIG. 2B, when the clip 20 'which is an operating member is mounted at a predetermined position on the bottom surface 10c of the main body 10, the through hole 19' formed in the bottom surface 10c is mounted.
The tip (actuating piece) 21 'of the clip 20' enters through the pin and biases the projecting piece 18 'in a predetermined direction. This allows
As shown by the solid line in the figure, the reflection plate 15 rises and the second
The radar wave incident from the window 13 is reflected by the reflector 15 and then received by the antenna 11. Therefore, by using the structure shown in FIG. 1B, it can be used for a motorcycle.

Further, in this embodiment, since the reflector 15 is erected at a predetermined angle by the clip 20 ', even if the rider's chest pocket is so small that the main body 10 cannot be stored, the clip 20 can be stored. It is possible to mount the main body 10 using '.

When the main body 10 is stored in the chest pocket, the curved loop portion such as the clip 20 'shown in the figure becomes unnecessary. Also in the present example, the reflector plate 15 is prepared by preparing a plurality of clips 20 'having different lengths of the tip 21' or changing the insertion distance.
Since the angle of can be changed, the user can adjust the receiving sensitivity according to his / her driving posture to be the best.

Although the torsion coil spring is used as the elastic means in the above embodiment, the present invention is not limited to this, and a leaf spring or other spring may be used.
Further, it may be made of rubber, constituent resin, or other material having elasticity. However, considering durability (maintaining the elastic force when maintaining the same state for a long time and / or maintaining the elastic force when the motorcycle and the vehicle are repeatedly used), the spring is good, and it is more effective than the leaf spring. As in the example, a twisted coil spring improves durability.

Further, the reflecting plate is also moved in a rotating manner in the above-mentioned embodiment, but the present invention is not limited to this, and it is also possible to take an arbitrary movement such as a sliding movement.
However, this is also preferably rotated in consideration of downsizing and stability of the entire apparatus.

Further, the first and second windows may be made of an optically (microwave) transparent material,
Further, it may be completely opened. Furthermore, the positions of the front surface and the top surface of the main body referred to in this specification are referred to as the top surface, and the positions of the side surfaces are based on the case where the flat main body is positioned horizontally as shown in FIG. One of them is called the front.

[0036]

As described above, in the microwave detector according to the present invention, by changing the position of the reflector, the detectable (incident) surface of the microwave can be made the first and second window portions. Since one of them can be selected as an alternative, it becomes possible to apply to both automobiles and motorcycles with a single microwave detector.

According to the second and third aspects, the position of the reflector is switched / moved by attaching / detaching the operating member, that is, the switching process between the case of applying to the automobile and the case of applying to the motorcycle is simple. And it can be done reliably, and malfunctions are reduced.

Further, when the reflecting plate is rotationally moved as described in claim 4, the escape area of the reflecting plate can be made extremely small, and the main body can be miniaturized. Moreover, as described in claim 5, when rotating the reflector, by appropriately setting the stop position of the reflector, the reception sensitivity can be adjusted relatively easily, and the optimum reception sensitivity can be obtained. Can be made easier. Furthermore, if the operating member is formed in a clip shape (claim 6), the clip can be used to easily attach the main body to a pocket or the like of a driver of a motorcycle.

[Brief description of drawings]

FIG. 1 is a diagram showing a first embodiment of a microwave detector according to the present invention.

FIG. 2 is an enlarged plan view of an essential part thereof.

FIG. 3 is an enlarged cross-sectional view of the relevant part.

FIG. 4 is a diagram showing an example of a usage state.

FIG. 5 is a diagram showing an example of a usage state.

FIG. 6 is a diagram showing an example of a usage state.

FIG. 7 is a diagram showing an example of a usage state.

FIG. 8 is a diagram showing an example of a usage state.

FIG. 9 is a diagram showing a second embodiment of the microwave detector according to the present invention.

FIG. 10 is a diagram showing an example of a conventional microwave detector.

[Explanation of symbols]

 10 Main Body 11 Antenna 12 First Window 13 Second Window 15 Reflector 20 Bracket (Operating Member) 20 'Clip (Operating Member) 21, 21' Protrusion

Claims (6)

[Claims] 1. A flat main body having an antenna and a predetermined signal processing circuit incorporated therein is provided with first and second window portions through which predetermined microwaves can be transmitted on the front surface and the top surface, and is formed on the top surface. The reflecting plate is provided so as to be movable on the path of the microwave incident from the second window part, and the reflecting plate is set at a predetermined angle position, so that the microwave entering from the second window part is set. Waves are radiated to the reflection plate to change its course and are received by the antenna, and the reflection plate is moved to a predetermined position, whereby the first
The microwave detector in which the microwave incident from the window portion of the reflector travels without being blocked by the reflector and is received by the antenna. 2. A mechanism for moving the reflection plate, wherein the reflection plate is in an unloaded state, the first window portion or the second window portion.
Elastic means for setting the microwave incident from one window part of the window part to one position for guiding to the antenna, and by attaching to the main body, directly or indirectly with respect to the reflection plate The microwave detector according to claim 1, further comprising: an operating member that urges the elastic member to move to the other position while elastically deforming the elastic member. 3. The microwave detector according to claim 1, wherein the elastic means is a spring. 4. The movement of the reflection plate is adapted to rotate within a predetermined angle range between a position where the reflection surface of the reflection plate is substantially parallel to the main body and a position where the reflection surface is inclined by a predetermined angle. The microwave detector according to any one of claims 1 to 3. 5. The reflection plate is rotatively moved, and an inclination angle of the reflection plate with respect to the main body can be adjusted by changing an urging amount of the reflection plate by the operation member. 4. The microwave detector according to item 4. 6. The operation member has a clip shape, and when the operation member is attached to the main body, microwaves incident from the second window portion are reflected by the reflection plate and received by the antenna. The microwave detector according to any one of claims 1 to 5, wherein the microwave detector is used.