JPS5871240A - Rear monitoring device for car - Google Patents

Abstract

PURPOSE:To detect the presence of an object for sure and to prevent a damage from occurring by fitting a ultrasonic generator or a receiver inside a rear bumper. CONSTITUTION:A rear bumper 4 is constituted with an outside frame 4a and a reinforcing frame 4b, in which is arranged a ultrasonic generator 7a, which is constituted with a main body 10 enclosing a ultrasonic generating element 8 with a synthetic resin material layer 9 and a horn 11 opening toward a car rear. The born 11 has a conical thin wall 12 made in one unit with the synthetic resin material layer 9 of the main body 10, and the ultrasonic generating element 8 is arranged at the deepest section of a ultrasonic radiating aperture 13. The time duration from the time the ultrasonic wave is generated by the ultrasonic generator 7a to the time its reflected wave is received by a ultrasonic receiver 8a is measured by an electronic control unit, thus the distance from an object existing at the back of the car can be calculated based on the measured result.

Description

[Detailed description of the invention] Book) #5 relates to a vehicle rear monitoring device.

An ultrasonic generator that generates ultrasonic waves toward the rear and a receiver that receives the reflected ultrasonic waves were installed on the underside of the rear pan and seven of the 1i cars from Yorai, and ultrasonic waves were generated. The system measures the time from when the vehicle is moving until the reflected wave is received, determines whether an object exists within a predetermined distance from the rear end of the vehicle, and issues a warning to the driver if an object is present. For example, a vehicle platform is designed to prevent a collision when a heavy vehicle is reversing.

A two-way monitoring device has been proposed. However, riyatan parable has its own degree and weight? Mounting the ultrasonic generator and receiver on the rear bumper as described above, since the southeast of the rear bumper is attached to the rear bumper is the older angle due to M. In addition, if the receiver is mounted at a proper angle, it will deviate from the correct angle, and as a result, the direction of ultrasonic emission will shift, making it difficult to accurately detect the presence of the object to be detected. There's a problem. Furthermore, since the ultrasonic generator and receiver protrude from the rear bumper 11, they are not only susceptible to damage from stones thrown by the rear wheels, but also have an unsightly appearance.

SUMMARY OF THE INVENTION An object of the present invention is to provide a vehicle rear monitoring device a that can reliably and accurately detect whether an object exists behind both vehicles and prevent damage.

The present invention will now be described in detail with reference to the accompanying drawings.

Referring to Figures 1 and 2, ■ indicates the rear part of 6 cars,
2 is a rear window, 3 is a rear wheel, 4 is a rear gun fixed to the lower end of the rear end of the vehicle body, 5 is a light unit containing a tail lamp, etc.), and 7a.

7b is an ultrasonic generator disposed in the rear bumper 4;
8a and 8b respectively indicate ultrasonic receivers arranged in the rear gunpa 4. As shown in Figure 1, the ultrasonic generator 7
The ultrasonic receivers a and 7b and the ultrasonic receivers sa and sb are arranged alternately at regular intervals. In the embodiment shown in FIG. 1, at the beginning of cutting, an ultrasonic wave generator 7a generates an ultrasonic wave toward the rear, and if there is an object behind it, the reflected wave from the object is transmitted to an ultrasonic wave receiver. 8a, and then the ultrasonic generator 7b generates an ultrasonic wave backward, and if there is an object behind it, the ultrasonic receiver 8a receives the reflected wave from the object. The generator 7b generates an ultrasonic wave e toward the rear, and an object exists behind the object.The ultrasonic receiver 8b receives the reflected waves from the object, and detects an object over a wide area behind the object. I am trying to detect the existence of . The structure of the ultrasonic generators 7a and 7b with J4y and the mounting and structure of the ultrasonic receivers 8a and 8b are similar. describes only the structure.

Refer to Figure 3 14C (Then, the rear pan is composed of an outer frame 4a and a reinforcing frame 4b disposed within the rear pan flat outer frame 4a, and a The ultrasonic generator 7a is equipped with a main body 10 in which an ultrasonic generating element 8 is surrounded by a synthetic resin material layer 9, and a horn 11 that expands toward the rear of the vehicle. The horn 11 has a conical thin wall 12 that is integral with the synthetic resin material layer 9 of the main body 10, and the ultrasonic wave is emitted at the innermost part of the ultrasonic emission opening 13 formed in the conical thin wall 12. A generating element 8 is arranged i-1'. A pair of terminals 14 are provided horizontally in parallel on the swing surface of the ultrasonic generating element 8, and these terminals 14 are connected via lead wires 15. and is connected to an electronic 1tilJ I+ unit (not shown).

In this electronic control unit, the ultrasonic generator 7a measures the time from when it generates one sound until the ultrasonic receiver 8a receives the reflected wave. The distance to the object behind the vehicle is calculated, and when this distance becomes less than a predetermined distance, the driver is alerted by, for example, making a scissor sound.

A kazo-like metal member 16 is fitted to the front end of the main body 10, and this metal member 16 is fixed to the resin material layer 9 with screws 17. The metal member 16 is fixed to the metal member 18.
A base 19 is fixed on the outer wall surface of the housing. The nutadpilt 18 extends through the spacer 19 and connects the spacer 19 to the spacer 19.
9 protrudes outward from the end surface 19a. As shown in FIG. 3, a main body 10, a horn 11. The outer cylindrical surface of an annular flange portion 12a integrally formed at the tip of the horn 11 is covered with a logging 20 made of a rubber material to prevent leakage of ultrasonic waves. The upper end 21 of the horn flange 12a of the horn 711 is pressed onto the outer wall surface of the rear gun 9 outer frame 4a through the pullout 20, and from the lower end of the horn flange 12a, the curved lower end of the flange 20 The portion 20a protrudes and the tip of the lower end portion 20a is fitted onto the outer wall surface of the rear passenger compartment and outer frame 4a.

On the other hand, each ultrasonic generator 7a, 7b and an ultrasonic receiver 8a are provided at the rear end of the rear bumper reinforcing frame 4b.

A hole 22 is formed corresponding to each hole 8b, and as shown in FIG.
Penetrates inside 2. Furthermore, a vertically extending bracket 23 is disposed within the reinforcing frame 4b, and the upper and lower ends of the bracket 23 are respectively fixed to the inner wall surface of the reinforcing frame 4b. This bracket 23 has an opening 24 in its center, and the ultrasonic generator 7a passes through the opening 24. Further, an ultrasonic generator support member 25 is arranged within the reinforcing frame 4b. The support member 25 has a vertically extending end wall 26 at its front end, as shown in FIGS. 3 and 4, and three flanges 27, 28, 29 at its rear wall. These flanges 27.degree. 28.29 are secured to the bracket 23 by means of a bolt 30 and a nut 31, respectively.

In addition, as shown in Fig. 3, there are 7 lunges each 27.28.
Between 29 and bracket 23 is a vibration-proofing comb, sea 3.
2 is inserted, and a rubber pusher 33 for installation protection is also inserted between each flanges 27, 28, 29 and the corresponding nut 31.
Ru. A vertically extending strip 34 is fixed to the end wall 26 of the support member 25, and this strip 34 connects the upper end of the horn annular flange 12a to the contact point 21 with the outer frame 4a. It has a curved portion 34a having a radius of curvature R at the center.

At this time, the curved portion 34a has a strip 35 extending vertically.
is formed. On the other hand, an opening 36 is formed on the end wall 26 of the support member 25, and the spacer 19 passes through the opening 36. The end surface 19a of the spacer 19 has a radius of curvature R centered on the contact point 21 between the upper end of the horn annular flange portion 12a and the rear pan/flat outer frame 4a, and this end surface 19a has a radius of curvature of R of the strip plate piece 34. It slidably contacts the inner wall surface of the i-curved portion 34a. The stud root 18 is the curved part 34
Pass through the slit 35 of a and protrude from the curved portion 34a,
A spacer 38 is fitted onto this stud into a protrusion of the bolt 18. The inner end surface of this spacer 38 is formed into a curved shape along the outer wall of the curved portion 34a, and the outer end surface of the spacer 38 is formed into a substantially vertical flat surface. A nut 39 having a stud screwed onto the root 18 is fastened onto the outer end surface of the spacer 38 . When the sister stud delt 18 is moved up and down within the slit 35 of the curved portion 34a by loosening the nut 39 as shown in FIG. The ultrasonic generator 7a rotates around the melting point 21. Then, by tightening the nut 39, the ultrasonic generator 7
a is fixed to the rear bumper 4. Therefore, horn 1
1, that is, the radiation direction of the lYj sound waves can be adjusted. As shown in FIGS. 3 and 5, the collar 20J that connects the thin wall 12(7) of the horn 11 has three lips 40 extending upward.
are integrally formed. Grooves 4 are provided at the upper ends of these lips 40.
1 is formed, and this groove 41 is fitted into the inner peripheral edge of the rear pan/main outer frame 4b that defines the opening 22. On the other hand, a lip 42 extending downward from the coating 20 is integrally formed on the lower side of the horn 11, and a groove 43 formed at the lower end of the lip 42 is formed on the inner peripheral edge of the lip 4b that defines the opening 22. It is fitted. Each lip 40, 42 is formed from an elastic rubber material integrally formed with the coating 20;
serves to support the horn 11 by the reinforcing frame 4b of the rear bumper 4b while achieving a vibration-proofing effect.

According to the present invention, since the horn 11 is provided, the directivity of the ultrasonic waves is improved, and thus an object to be detected that exists behind the vehicle can be reliably detected. Furthermore, since the ultrasonic generator and receiver can be housed together with the horn in the rear pants 4, damage to the ultrasonic generator, receiver, and horn by, for example, pebbles thrown off by the rear wheels can be prevented. In addition, the ultrasonic generator and receiver panel (8) and the horn can be moved horizontally to the rear pan, making it more desirable in terms of appearance. In addition, it is possible to adjust the angle of the ultrasonic generator and receiver with respect to the rear pan/flat, so it is possible to adjust the angle of the ultrasonic generator and receiver to the rear pan. Is it possible to accurately direct the ultrasonic radiation direction in a predetermined direction regardless of the nature of the installation or the Hariaba 7TE (7) installation? can be determined.

Furthermore, since the ultrasonic generator and receiver are covered with a coating made of a rubber material, it is possible to prevent ultrasonic waves from leaking vertically and horizontally. It goes without saying that the angle adjustment device ffi for mounting the receiver can also be used commercially when these ultrasonic generators and receivers are placed inside a double body.

[Brief explanation of the drawing]

Figure 1 is a plan view of the rear of the vehicle, Figure 2 is Il1 of the rear of the vehicle.
3 is an enlarged sectional view of part A in FIG. 2, FIG. 4 is a sectional view of the support member taken along line IV-IV in FIG. 3, and FIG. It is a sectional view of the horn taken along V-Va in the figure. 4... Rear bumper, 7a, 7b... Ultrasonic generator, 8... Ultrasonic generation element, 8a, 8b... Ultrasonic receiver, 10... Main body, 11... Horn, 18 ...
Stud bolt, 25... Support member, 34... Band piece, 35... Slit. Patent applicant: Toyota Motor Corporation Tokyo Kogyo Co., Ltd. Patent attorney: 1 per month Patent attorney: L:! i! Kazuyuki Shinishitate Patent Attorney Kyosuke Donakayama Patent Attorney Akira Yamaguchi (11)

Claims (1)

[Scope of Claims] 1. A rear vehicle for a vehicle having an ultrasonic generator that generates ultrasonic waves rearward at the rear end of the vehicle, and a receiver that receives reflected waves of the ultrasonic waves. A rear monitoring device for a vehicle, in which the ultrasonic generator or receiver is additionally installed inside a rear bumper of a vehicle. 2. In a rear monitoring device for a vehicle that includes an ultrasonic generator that generates ultrasonic waves toward the rear of the vehicle and a receiver that receives reflected waves of the ultrasonic waves, If the ultrasonic generator or receiver is installed at an angle, ￥1
A vehicle rear monitoring device equipped with an adjustment device.