Dust Cover for Car Reversing Range Finder

The dust cover technology of the automobile reversing rangefinder relates to a dust cover mechanism on the ultrasonic ranging device controlled by a single chip computer.As is known to all, if the car can measure the distance between the obstacles behind the car and the car when reversing, it will greatly improve the safety of reversing and bring convenience to the driver.In the existing technology, there are "automobile reversing alarm" and "reverse language alarm", which can emit "toot" sound or "reverse, please pay attention" and other languages when reversing.The above two types of devices are passive, and have no effect on objects and people without self-knowledge.

The driver can not know the exact distance of the obstacles behind the car.Especially when the car is running, there will be sludge on the sensor installed behind the car, blocking the ultrasonic transmission and receiving channel, so that the automobile reversing rangefinder loses its effectiveness.The purpose of our discussion today is to provide a dust cover mechanism installed on the detector (the automobile reversing rangefinder is equipped with ultrasonic transmission and receiving sensor parts).The dust cover is covered on the outer surface of the detector, which can prevent the sludge from being thrown on the ultrasonic sensor.When the automobile reversing rangefinder is working, it can be opened automatically, and closed automatically when the work is finished.

The method is that in the dust cover structure formed by the opening device and the recovery device, the opening device is composed of an electromagnet and a torque transmission mechanism. When the electromagnet is energized, the iron is moved by the suction, and the torque transmission mechanism is converted to drive the dust cover to open the transmitting and receiving channel port of the ultrasonic sensor. When the power is off, the dust cover is restored by the elasticity of the spring.

There are the following advantages:
1, can prevent sludge clogging ultrasonic sensor transmission and reception channel mouth.
2, when washing the vehicle, can withstand the hose water rinsing directly and prevent the ultrasonic sensor moisture failure.
The following combines the attached drawings and embodiments of the utility model for further explanation.
Figure 1 is a schematic diagram of the structure of the technology.

Fig. 2 and Fig. 3 are the state diagrams of the dustproof cover plate when it is closed and opened respectively.

Figure 4 is a schematic diagram of another embodiment of the present technology.

FIG. 5 is a state diagram of the embodiment of FIG. 4 when the dustproof cover plate is opened.

FIGS. 6 and 7 are state diagrams of a third embodiment of the present technology when the dustproof cover plate is closed and opened, respectively.

With reference to Figures 1, 2 and 3, the opening device of the present technology consists of an electromagnet (1) and a torque transmission mechanism. The electromagnet (1) is mounted in the detector plastic housing (6), and the armature (2), the rack (7), the gear (8), and the gear shaft (9) form the torque transmission mechanism. Wherein the rack (7) is fixed on the solenoid armature (2), the gear (8) meshes with the rack (7), and the gear shaft (9) is integrated with the gear (8) and press-fitted to the housing (1) for rotation. Response device spring (5) on the gear shaft (9), one end against the shell (1), the other end against the dust cover (4), ultrasonic sensors (0), power supply and signal line plug seat (11) were installed in the shell (6). When working, the electromagnet (1) energized, armature (2) by electromagnetic force movement, fixed in the armature (2) on the rack (7) Drive gear (8) rotation, and gear (8) coaxial dust cover (4) open about 135 °, revealing ultrasonic transmission and reception channel mouth; when the electromagnet (1) power-off, the electromagnetic force disappeared, the elastic force of the spring (5) will be the dust cover plate pressed on the surface of the sensor (0) to protect the sensor from sludge, dust and dirt. Protect the sensor from sludge, dust, rinsing The sensor is protected from sludge, dust and hose water. Referring to Figs. 4 and 5, in another embodiment, the solenoid (1) is mounted in the detector housing (6), and the armature (2), the dust cover (4), the shaft (7), [11], and the connecting rod (9) form a torque transmission mechanism. The rotating shaft (7) connects the cover plate (4) with the housing (6) and can be rotated. The cover plate (4) is riveted to one end of the connecting rod (9). The other end of the connecting rod (9) is connected to the armature (2) by means of a spindle (11) and can be rotated in a certain direction. The sensor (0) is mounted in the housing (6) and covered by the cover (4). The spring (5) of the response device is set on the armature (2). When working, the electromagnet (1) energized, armature (2) by suction movement, through the rotating shaft (7), (11), connecting rod (9) composed of the torque transmission mechanism, driven by the cover (4) outward rotation, revealing the ultrasonic transducer transmitter-receiver channel. When the electromagnet (1) is de-energized, the armature (2) relies on the elasticity of the spring (5) to recover and drive the cover plate (4) to cover the transducer transmitting and receiving channel. Referring to Fig. 6 and Fig. 7 the utility model can also use double electromagnets, each electromagnet drives a piece of dust cover plate action. One end of the connecting rod (9) is fixed to the armature (2), and the other end is connected to the cover plate (4) through the rotating shaft [11], which can be rotated. The rest of the mechanism and part numbers are the same as in the embodiment of Figures 4 and 5.