JPH0735846A - Ultrasonic sensor for vehicle - Google Patents

Abstract

PURPOSE:To simply post-mount an ultrasonic sensor for vehicle on a vehicle adjust the detection area of the ultrasonic sensor for vehicle, and drain water entering the ultrasonic sensor for vehicle smoothly. CONSTITUTION:An adhesion part 1 on the reverse side of a cover 2 is applied to an arbitrary position of a vehicle. A detection area is adjusted by providing an ultrasonic sensor body 3 into the cover 2 in a closed-end cylindrical shape by varying the angle freely. A drainage hole 5 is provided at a leading part for leading a lead wire 4 toward the outside of the cover 2 from the ultrasonic sensor body 3 for drainage.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ultrasonic sensor for a vehicle which detects obstacles and a human body by using ultrasonic waves and provides a safe driving for a driver.

[0002]

2. Description of the Related Art Ultrasonic ultrasonic sensors for vehicles use ultrasonic waves for sensing, and intermittently transmit ultrasonic pulse signals to detect obstacles and human bodies in the vicinity. By receiving the reflected waves, obstacles and human bodies are detected, the danger is notified to the driver, and safe driving is provided.

An ultrasonic sensor for a vehicle is composed of an ultrasonic sensor provided on a vehicle body such as a bumper portion of each corner portion around the vehicle, a main body for controlling an operation, and a buzzer for displaying an alarm. Power is supplied from the backlight power supply.

[0004]

The vehicle 3 is conventionally used.
As shown in FIG. 12, the vehicle ultrasonic sensor A installed on the vehicle body such as the bumpers 40 at the corners around the vehicle 1 is fixed on the bumper 40 of the vehicle 31 by the stay 41. For this reason, the removal of the bumper and the stay tool 4
Construction such as fixing 1 is difficult. There is no freedom in the place of installation. The angle of the sensor cannot be changed and the detection area cannot be adjusted depending on the vehicle model. There were various problems.

The present invention was invented in view of the above-mentioned problems of the conventional example, and the purpose thereof is to be able to easily attach the vehicle to a vehicle even if it is retrofitted, and the construction is very simple. In addition, the present invention provides an ultrasonic sensor for a vehicle that can adjust the detection area and can travel safely.

[0006]

In order to solve the problems of the above-mentioned conventional examples and to achieve the object of the present invention, an ultrasonic sensor for a vehicle of the present invention has a bottomed cylindrical shape having an adhesive portion 1 on its back surface. An ultrasonic sensor main body 3 is provided in the cover 2 so that the angle can be freely changed, and a drainage hole 5 is provided in a lead-out portion for drawing out the lead wire 4 from the ultrasonic sensor main body 3 to the outside of the cover 2. To do.

It is preferable that the fixing means 12 for fixing the ultrasonic sensor main body 3 to the cover 2 at a predetermined angle is arranged in the same direction as the lead-out port 6 of the lead wire 4. In addition, a hemispherical projection 7 is provided on the back of the ultrasonic sensor body 3.
It is also preferable to provide a ring-shaped receiving portion 8 for receiving the hemispherical projection 7 on the bottom of the cover 2 so that the ultrasonic sensor main body 3 can change its angle. Also, this ring-shaped receiving portion 8
It is also preferable that the O-ring 8a is made of an elastic material.

Further, the ultrasonic sensor main body 3 is constituted by accommodating the ultrasonic microphone 10 in the sensor case 9 and accommodating the lead wire 4 in the groove 11 formed in the sensor case 9. Is also preferable. Also,
It is also preferable that at least a part of the lead wire 4 has a double coating structure.

[0009]

According to the present invention having the above-described structure, the ultrasonic sensor main body 3 is provided in the bottomed cylindrical cover 2 having the adhesive portion 1 on the back surface so that the angle of the ultrasonic sensor main body 3 can be freely changed. It can be freely attached to any place on the vehicle, and the detection area is adjusted by changing the angle of the ultrasonic sensor main body 3. Further, by providing the water drain hole 5 in the lead-out portion for pulling out the lead wire 4 from the ultrasonic sensor main body 3 to the outside of the cover 2,
The water that has entered the cover can be drained to the outside through the water drain hole 5, and the water drain hole 5 is attached downward, so that the lead wire 4 is also pulled out downward and the lead wire 4 is pulled out. It becomes difficult to see from the outside.

Further, the fixing means 12 for fixing the ultrasonic sensor main body 3 to the cover 2 at a predetermined angle is arranged in the same direction as the lead-out port 6 of the lead wire 4, so that the lead wire 4 to be drawn downward is Since the fixing means 12 is located on the lower side, which is the same direction as the pull-out direction, it becomes difficult to see the fixing means 12 from the outside. Further, a hemispherical projection 7 is provided on the back of the ultrasonic sensor main body 3, and a ring-shaped receiving portion 8 for receiving the hemispherical projection 7 is provided on the bottom of the cover 2 so that the ultrasonic sensor main body 3 can change its angle. Thus, it is possible to change the angle in the entire circumferential direction and in a thin shape. At this time, the hemispherical projection 7 is supported in a ring shape by the ring-shaped receiving portion 8 instead of the entire projection, and the angle can be stably held. When the ring-shaped receiving portion 8 is composed of the O-ring 8a made of an elastic body, vibration can be prevented by the O-ring 8a made of an elastic body, and resonance with the sensor case 9 can be suppressed.

The ultrasonic sensor main body 3 is constructed by housing the ultrasonic microphone 10 in the sensor case 9. When the lead wire 4 is housed in the groove 11 formed in the sensor case 9, the lead wire 4 is removed. It is easy to assemble without dislodging, and the elasticity of the lead wire 4 can be utilized to prevent vibration. Further, when at least a part of the lead wire 4 has a double coating structure, the coating damage can be prevented when the lead wire 4 is pulled into the vehicle, or when the double coating portion is introduced into the ultrasonic sensor main body 3, the lead wire 4 can be prevented. The elastic force of No. 4 is increased, and the vibration damping effect can be further improved.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the embodiments shown in the accompanying drawings. As shown in FIG. 1, the bottomed tubular cover 2 is constructed by attaching a bottom plate portion 13 to one end of a tubular cover body 14. To attach the bottom plate portion 13 to the cover body 14, for example, as shown in FIG. 5, a leg piece 15 having elasticity is provided at one end portion of the cover body 14 and an engaging hole 16 is provided in the leg piece 15, and the bottom plate portion 13 is attached. The locking claw 17 is provided, and the locking claw 17 is attached by elastically locking the locking claw 17 in the locking hole 16. A ring-shaped receiving portion 8 is provided on the bottom plate portion 13 forming the bottom portion of the cover 2, and the ring-shaped receiving portion 8 is formed by an O-ring 8a made of an elastic body such as rubber. Although the cover body 14 has a tubular shape, a substantially half portion of the inner peripheral surface on the side opposite to the bottom plate portion 13 has a small diameter so that the end portion side of the cover body 14 on the side opposite to the side where the bottom plate portion 13 is mounted has a small diameter. It has a hemispherical shape (actually, the top of the hemispherical surface is cut to form an opening), and the cover body 1
A pair of detent guide grooves 18 are provided on the inner surface of 4 from the opening end on the bottom plate 13 side to the vicinity of the opposite end. A lead-out portion for leading out the lead wire 4 is provided at an end portion of the cover body 14 on the side of the bottom plate portion 13, and a drainage hole 5 is provided in this lead-out portion. In the embodiment shown in the accompanying drawings, the lead-out portion for drawing out the lead wire 4 is provided with the lead-out opening 6 for the lead wire 4, but it may be a concave cutout portion for drawing out the lead wire 4. A screw hole is provided on the surface of the cover body 14 in the same direction as the lead wire outlet 6 and a screw is provided, and this screw fixes the ultrasonic sensor body 3 to the cover 2 at a predetermined angle.
Has become.

The ultrasonic sensor main body 3 is constructed by housing an ultrasonic microphone 10 in a sensor case 9. The sensor case 9 includes an inner case 20 and an outer case 21.
The ultrasonic microphone 10 is housed in the inner case 20, and the outer case 21 is attached to the inner case 20 so as to prevent the ultrasonic microphone 10 from coming off. A hemispherical projection 7 is provided on the back surface of the inner case 20. The outer peripheral surface of the outer case 21 is a hemispherical surface (actually, the top of the hemispherical surface is cut to form an opening), and the outer surface of the outer case 21 is prevented from rotating on both sides near the rear end. A guide projection 22 is provided.
A groove 11 is formed in the peripheral wall portion of the sensor case 9 and the lead wire 4 is fitted therein. By thus fitting the lead wire 4 into the groove 11, the lead wire 4 can be easily assembled without being loosened, and the elasticity of the lead wire 4 can be utilized for vibration isolation. In the embodiment shown in the accompanying drawings, a groove 11 is formed around the back surface of the inner case 20, the lead wire 4 is fitted into the groove 11, and a holding portion 23 provided on the outer case 21 is provided on the outer periphery of the groove 11. The lead wire 4 fitted in the notch formed in a part of the wall and fitted in the groove 11 is pressed by the pressing portion 23. In this way, the elasticity of the lead wire 4 acts more effectively. The lead wire 4 has a double coating structure of a certain length at least from the lead-out portion of the ultrasonic sensor body 3. That is, the outer surface of the covering material 30 of the lead wire 4 is further covered with the outer covering material 31.

Before attaching the bottom plate portion 13 to the cover body 14, from the end opening of the cover body 14 on which the bottom plate portion 13 is attached (that is, the end opening of the cylindrical cover body 14 having the larger diameter). (1) The ultrasonic sensor body 3 is fitted and the hemispherical outer surface of the cover body 14 is covered with the cover body 1.
The inner surface of 4 is fitted in a hemispherical portion so that the angle can be freely changed. In this case, a part of the ultrasonic sensor main body 3 is fitted so as to project from the opening of the cover main body 14 to the outside, and in this case, the pair of anti-rotation guide protrusions 22 are respectively provided. It is slidably fitted in the groove 18. In this state, the cover body 14
The bottom plate 13 is attached to one end of the above, and the hemispherical projection 7 provided on the back of the ultrasonic sensor main body 3 is received by the ring-shaped receiving portion 8 provided on the bottom of the cover 2. Therefore, the ultrasonic sensor main body 3 is freely changeable in angle with respect to the cover 2 while the helix-shaped projection 7 is received by the ring-shaped receiving portion 8 while the detent guide projection 22 is guided by the detent guide groove 18. It has become. By thus receiving the hemispherical projection 7 by the ring-shaped receiving portion 8, the angle can be changed in the entire circumferential direction and in a thin shape,
In addition, the angle holding is stabilized by supporting the ring-shaped receiving portion 8 instead of the entire hemispherical projection portion 7. Then, the ring-shaped receiving portion 8 is made of an elastic material such as rubber.
By using the ring 8a, vibration can be prevented by the elastic body, and resonance with the case 2 can be prevented. In FIG. 3, the ultrasonic sensor main body 3 has a maximum angle (20 in the embodiment).
°) An example of tilting is shown. Further, in the state where the ultrasonic sensor main body 3 is attached to the cover 2 in such a manner that the angle can be freely changed, the lead wire 4 drawn from the ultrasonic sensor main body 3 is covered from the drawing opening 6 of the cover 2 as shown in FIG. 2 It is pulled out.

Further, in the present invention, the adhesive portion 1 is provided on the back surface, and in the embodiment shown in the accompanying drawings, the double-sided tape serving as the adhesive portion 1 is attached to the back surface of the bottom plate portion 13. An elastic rubber base 25 is attached to the rear end of the outer surface of the cover 2, and the rear end of the elastic base 25 projects slightly rearward of the adhesive portion 1. The base 25 is provided with a lead-out portion 32 for pulling out the lead wire 4.

The ultrasonic sensor A for a vehicle of the present invention as described above is attached to an arbitrary position of a vehicle 31 such as an automobile, and the adhesive portion 1 provided on the back surface is attached to an arbitrary position of the vehicle. It is to be attached to and attached to. In this case, as shown in FIG. 6 (b), the ultrasonic sensor A for vehicle is used.
The lead wire 4 of the
Is attached so that it can be pulled out downward. At this time, the rear end edge of the elastic base 25 is deformed and elastically contacts the vehicle 31. The lead wire 4 drawn out downward is drawn into a vehicle (for example, a trunk) and is connected to a main body 33 that controls the operation. In FIG. 6A, reference numeral 34 is a buzzer for displaying an alarm, and 35 is a backlight power source as a power source. Here, at least a part of the lead wire 4 has a double coating structure, so that the coating wire can be prevented from being damaged when the lead wire 4 is pulled into the vehicle. Further, by making the portion of the lead wire 4 introduced into the ultrasonic sensor main body 3 also a double coating portion, the elastic force of the lead wire 4 becomes large, and the vibration damping effect is further improved.

FIG. 8 shows an example of the mounting position of the ultrasonic sensor A for a vehicle, where a is an example of affixed to the end of the trunk cover and b is an example of affixed to the lower body of the tail lamp. , C is an example attached to the side surface of the bumper. Here, when the ultrasonic sensor main body 3 is attached to the cover 2 of FIG. 8, the ultrasonic sensor main body 3 with respect to the cover 2 so that the central axis X of the detection area E of the ultrasonic sensor main body 3 is inclined downward by 20 ° as shown in FIG. The angle is changed, and when the ultrasonic sensor main body 3 is attached to the cover 2 of FIG. 8, the ultrasonic sensor main body 3 is attached to the cover 2 so that the central axis X of the detection area E of the ultrasonic sensor main body 3 becomes horizontal as shown in FIG. To change the angle,
Further, when the ultrasonic sensor main body 3 is attached to the c of FIG. 8, the ultrasonic sensor main body 3 is angled with respect to the cover 2 so that the central axis X of the detection area E of the ultrasonic sensor main body 3 is inclined upward by 10 ° as shown in FIG. After changing the angle as described above, the screw serving as the fixing means 12 is tightened, and the outer surface portion of the ultrasonic sensor main body 3 is pressed by the tip of the screw to move the ultrasonic sensor main body 3 at a predetermined angle. It is fixed to the cover 2. FIG. 7 shows a detection area E in the case where two vehicle ultrasonic sensors A are attached to the left and right in a plan view.
Here, the fixing means 12 is arranged in the same direction as the lead-out port 6 of the lead wire 4, and the vehicle ultrasonic sensor A is attached to the vehicle 31 so that the lead-out port 6 of the lead wire 4 faces downward. Since the fixing means 12 is located below, it is difficult to see from the outside and the appearance is improved.

By the way, the lead-out port 6 of the lead wire 4 is directed downward, and the lead wire 4 is pulled out downward. In this case, a water drain hole 5 is provided in the lead-out portion for pulling the lead wire 4 out of the cover 2. Since it is provided, by attaching the ultrasonic sensor main body 3 to the cover 2 at an angle,
Although a gap is formed between the cover 2 and the ultrasonic sensor main body 3 to allow water to enter, this water can be drained to the outside through the drain hole 5.

[0019]

According to the present invention, as described above, the ultrasonic sensor main body is provided in the bottomed cylindrical cover having the adhesive portion on the back surface so that the angle can be freely changed, and the ultrasonic sensor main body is covered by the cover. Since a water drain hole is provided in the lead-out part for pulling out the lead wire outside, the sensor body can be freely attached at any position on the vehicle, and can be attached by a simple work of pasting Is. Further, when the ultrasonic sensor main body has a variable angle, a gap is generated between the cover and the ultrasonic sensor main body, but rainwater can be drained from the drain hole. Moreover, when attaching to the vehicle, the drainage hole is attached so that the drainage hole faces downward in consideration of drainage.As a result, the lead wire is pulled out downward, and the lead-out portion of the lead wire is visible to the outside. However, the appearance is improved.

Further, since the fixing means for fixing the ultrasonic sensor main body to the cover at a predetermined angle is arranged in the same direction as the lead wire outlet, the fixing means is also located below,
It is invisible to the outside and has a good appearance. In addition, a hemispherical projection is provided on the back of the ultrasonic sensor main body, and a ring-shaped receiving portion for receiving the hemispherical projection is provided on the bottom of the cover to allow the ultrasonic sensor main body to change its angle. In addition, it has a thin shape and can change the angle, and moreover, the angle can be maintained more stably than the one supporting the entire hemispherical projection.

Further, the ring-shaped receiving portion is made of an elastic material O.
By using a ring, vibration can be isolated by the elastic body and resonance with the case can be suppressed. Further, the ultrasonic sensor main body is configured by accommodating the ultrasonic microphone in the sensor case, and by accommodating the lead wires in the groove formed in the sensor case, the lead wires can be easily assembled without scattering, In addition, the elasticity of the lead wire can be used to prevent vibration.

Further, since at least a part of the lead wire has a double coating structure, there is an effect of preventing coating damage when the lead wire is pulled into the vehicle, or the double coating portion is introduced into the ultrasonic sensor main body. When this is done, the elastic force of the lead wire is increased and the vibration damping effect is further improved.

[Brief description of drawings]

1 is a cross-sectional view of the present invention.

FIG. 2 is an overall perspective view of the above.

FIG. 3 is a cross-sectional view showing a state in which the ultrasonic sensor main body of the same is changed in angle with respect to the case.

FIG. 4 is a rear view before mounting the above-mentioned bottom plate portion.

FIG. 5 is an exploded perspective view showing a locking leg and a locking claw of the same.

FIG. 6 (a) is an overall perspective view of an example in which a vehicle ultrasonic sensor is attached to the vehicle of the above, and FIG. 6 (b) is a perspective view of an attachment portion.

FIG. 7 is a plan view showing a detection area when two vehicle ultrasonic sensors are attached to the same vehicle.

FIG. 8 is a perspective view for explaining an example of attachment of a vehicle ultrasonic sensor to the above vehicle.

FIG. 9 is an explanatory diagram showing an example of a detection area showing an example of attachment of a vehicle ultrasonic sensor to the above vehicle.

FIG. 10 is an explanatory diagram showing a detection area of another example showing an example of mounting the vehicle ultrasonic sensor on the vehicle of the above.

FIG. 11 is an explanatory view showing a detection area of another example showing an example of mounting the vehicle ultrasonic sensor on the vehicle of the above.

FIG. 12 is a perspective view showing a conventional example.

[Explanation of symbols]

 1 Adhesive Part 2 Cover 3 Ultrasonic Sensor Main Body 4 Lead Wire 5 Drainage Hole 6 Drawout Port 7 Hemispherical Projection 8 Ring-shaped Receptor 8a O-ring 9 Sensor Case 10 Ultrasonic Microphone 11 Groove

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI technical display location H04R 1/02 330 9181-5H

Claims (6)

[Claims] 1. An ultrasonic sensor main body is provided in a bottomed cylindrical cover having an adhesive portion on the back surface so that the angle of the ultrasonic sensor main body can be freely changed, and water is drawn into a lead-out portion for pulling out a lead wire from the ultrasonic sensor main body to the outside of the cover. An ultrasonic sensor for a vehicle, which is provided with a hole. 2. The ultrasonic sensor for a vehicle according to claim 1, wherein fixing means for fixing the ultrasonic sensor main body to the cover at a predetermined angle are arranged in the same direction as the lead-out port. 3. The ultrasonic sensor main body is provided with a hemispherical projection on a back portion thereof, and a ring-shaped receiving portion for receiving the hemispherical projection is provided on a bottom portion of the cover so that the ultrasonic sensor main body can change its angle. The ultrasonic sensor for vehicles according to claim 1. 4. The ultrasonic sensor for a vehicle according to claim 3, wherein the ring-shaped receiving portion is composed of an O-ring made of an elastic body. 5. The ultrasonic sensor body comprises an ultrasonic microphone housed in a sensor case, and a lead wire housed in a groove formed in the sensor case. Ultrasonic sensor for vehicles. 6. The ultrasonic sensor for a vehicle according to claim 1, wherein at least a part of the lead wire has a double coating structure.