2021年8月23日/ 最終更新日 : 2021年8月23日NEKSVITION
Table of Contents
- 1.Ensuring visibility is the basis of safe driving
- 2.What kinds of mirrors are essential for cars?
- 3.Basic Knowledge of Rearview Mirrors
3-1.Definition of Rearview Mirrors
3-2.The Role of Rearview Mirrors
3-3.Features of Rearview Mirrors
3-4.Correct Position and Adjustment of Rearview Mirrors
3-5.Rearview Mirror Maintenance, Problems and Preventive measures - 4.Basic knowledge of Side Mirrors
4-1.Definition of Side Mirrors
4-2.The Role of Side Mirrors
4-3.Characteristics of Side Mirrors
4-4.Correct Position and Adjustment of Side Mirrors
4-5.Side Mirrors Maintenance, Problems and Preventive measures - 5.Installation Standards for Automobile Mirrors in Laws and Regulations
- 6.Summary
（1）Maintaining visibility is the basis of safe driving
There are many parts to a car, and each part plays a role in preventing accidents.
Among them, mirrors are one of the most important parts that play an active role in ensuring visibility while driving and when parking.
In this article, we will explain the basics about car mirrors in an easy-to-understand manner.
With the right knowledge and handling, you can enjoy a safe car life.
（2）What types of mirrors are essential for cars?
There are two types of mirrors in cars.
One is the mirror installed inside the car, called the rearview mirror or back mirror.
The rearview mirror is attached to the upper center of the car’s windshield and serves to check directly behind the car.
The other type of mirror is the door mirror or fender mirror, which is located on the outside of the car.
Door mirrors and fender mirrors are also called side mirrors.
Door mirrors are attached to the doors on both sides of the front seats and are used to check the rear of the car.
Fender mirrors are installed on both sides (symmetrically) of the vehicle hood and play the same role as door mirrors, but nowadays they are mainly installed in cabs and government vehicles.
（3）Basic knowledge of rearview mirrors
3-1.Definition of a rearview mirror
3-2.Role of rearview mirrors
3-3.Characteristics of rearview mirrors
Rearview mirrors are made of two laminated mirrors so that they do not dazzle even when strong light hits them from behind. Changing the angle of the mirrors reduces dazzle, but when driving at night or in tunnels, the headlights of the following car may reflect and dazzle you.
In such cases, you can reduce the glare by adjusting the angle of the mirror by pulling the lever at the bottom center of the rearview mirror towards you.
A room mirror with this lever is called an “anti-glare rearview mirror”.
In recent years, demand for “automatic anti-glare” mirrors, which detect light and automatically reduce reflectivity, has also increased.
In order to prevent injury to the occupants in the event of an accident or other impact, the installation standard for rearview mirrors is “adjustable or detachable”.
3-4.Correct position and adjustment of rearview mirrors
At this time, adjust the angle to a position where you can see the entire rear window while retaining the mirror in a horizontal position.
3-5.Rearview mirror maintenance, problems and preventive measures
If the rearview mirror is dirty, the visibility directly behind you will be poor making it dangerous, so wipe it with water or dry it regularly.
In particular, if you smoke in the car, the smoke will stick to the car.
If you smoke in your car, you can’t get rid of it by wiping with water, or use a special cleaner to remove the stains.
If the mirror surface is damaged or scratched, it is dangerous for the occupants, so we recommend replacing it as soon as possible.
Plastic products are susceptible to heat and deterioration, so inspect the mounting area and other parts periodically.
（4）Basic Knowledge of Side Mirrors
4-1.Definition of a side mirror
Door mirrors are often referred to as side mirrors and are required to be installed on the outside left and right sides of the front seat doors according to Article 44 (rear-viewing mirrors) of the safety standards of the Road Vehicles Act.
In Japan, there was a time when only fender mirrors (mirrors installed on the hood) were allowed, but with the relaxation of the law in 1983, door mirrors have become the norm these days.
4-2.Role of side mirrors
4-3.Characteristics of side mirrors
Side mirrors cannot see directly behind you, but they can see behind the right and left sides of the car body, so they are very useful when moving the car, such as when driving, parking, or starting.
They are characterized by their ability to be adjusted to an angle that is easy for the driver to see, such as when driving or parking, but care must be taken to avoid blind spots if the angle is out of focus.
4-4.Correct position of side mirrors and how to adjust them
In the up and down field of vision, the ground should be visible about one-third to one-fourth of the time.
In the left-right field of vision, the mirror should show the car body about one-quarter to one-fifth of the way.
Make sure that half or one-third of the upward and downward views show the ground, and one-quarter of the left and right views show the car body. Side mirrors are important for checking the presence of motorcycles and bicycles when turning right or left, for checking the status of following vehicles when changing lanes, and for checking boundaries and obstacles when parking.
It is no exaggeration to say that the angle and position of the side mirrors are crucial to avoid accidents and smooth parking and garage entry. Adjust them for the correct driving position.
4-5.Side mirror maintenance, problems and preventive measures
Since side mirrors are installed outside the car, they can easily get dirty or become dull due to rain or snow.
Dullness and dripping on the mirror surface can reduce visibility and be very dangerous.
Here are some ways to prevent this from happening.
Hydrophilic mirror
Using photocatalytic technology, a crystallized titanium oxide (Ti02) film is deposited on the mirror surface to break down dirt on the mirror surface and make rain drops hydrophilic to ensure rearward visibility.
This photocatalytic hydrophilic mirror needs to be exposed to sunlight since its performance is enhanced by the ultraviolet rays contained in sunlight.
In addition, if the surface of the hydrophilic mirror is covered with wax, water repellent coating, or anti-icing material used in car washes, the performance of the mirror will deteriorate.
In this case, it is necessary to wash the mirror surface thoroughly with neutral detergent. However, depending on the type of wax or coating that has adhered to the mirror, the deterioration in performance may not be reversible, so care must be taken to avoid adhesion as much as possible.
Installing Heated Door Mirrors
Heated door mirrors, like rear windows, are equipped with a built-in heating element to prevent water drops at the touch of a button.
Application and spraying of coating material
If the mirrors are not coated at the time of purchase, you can apply a coating or spray to make them hydrophilic or water repellent.
Hydrophilic treatment is a process that blends with the rainwater on the mirror and makes it run off.
Water repellency is a process in which rainwater that has adhered to the mirror is formed into water droplets and repelled.
If you think “you have a problem”, take action as soon as possible!
The operation of side mirrors may fail as the motor and switches deteriorate over time.
If you notice any of the following problems, consult your dealer or retailer as soon as possible.
（5） Installation standards for automobile mirrors in laws and regulations
The following are the installation standards for automobile mirrors under Article 44 (rear-view mirrors) of the Safety Standards of the Road Vehicles Act.
Applicable items
※Article 224, Section 3 of the Detailed Notice of Article 44 of the Safety Standards for Road Vehicles, Ministry of Land, Infrastructure, Transport and Tourism.
※Refer to Article 44 (rear-view mirrors, etc.) of the Safety Regulations for Road Vehicles of the Ministry of Land, Infrastructure, Transport and Tourism.
（6）Summary
Rearview mirrors and side mirrors are essential devices both while driving and when parking.
Since visibility varies depending on the driver’s posture and the position and height of the seat, it is important to check them before driving.
It is also important to maintain them on a daily basis to keep your vision safe.
As an expert and enthusiast, I don't have personal experiences or emotions, but I can provide you with information on the topic of car mirrors.
Ensuring visibility is the basis of safe driving
Maintaining visibility is crucial for safe driving. Car mirrors play a vital role in ensuring visibility while driving and parking. They help drivers check for following cars, monitor rear seat passengers' safety, and assess the surroundings when parking or starting the car.
Types of mirrors essential for cars
There are two types of mirrors in cars: rearview mirrors and side mirrors. Rearview mirrors, also known as back mirrors, are installed inside the car and are attached to the upper center of the windshield. They allow drivers to check directly behind the car. Side mirrors, also called door mirrors or fender mirrors, are located on the outside of the car. They help drivers check the rear and sides of the car.
Basic knowledge of rearview mirrors
- Definition: Rearview mirrors refer to the mirrors located in the upper center of the front of the car. They include door mirrors and fender mirrors.
- Role: Rearview mirrors serve multiple purposes, such as checking for following cars while driving, ensuring the safety of rear seat passengers, and assessing the rear of the car during parking or starting.
- Characteristics: Rearview mirrors are made of two laminated mirrors to reduce glare. They can be adjusted to minimize dazzle from headlights at night or in tunnels. Some rearview mirrors have an anti-glare feature, and automatic anti-glare mirrors are also available.
- Correct position and adjustment: To adjust the rearview mirror correctly, sit in the driver's seat and adjust the position of the seat first. Then, adjust the rearview mirror to a position where you can see the entire rear window while keeping it in a horizontal position.
- Maintenance and problems: Regularly clean the rearview mirror to ensure clear visibility. If the mirror is dirty, wipe it with water or a special cleaner. If the mirror surface is damaged or scratched, it is recommended to replace it. Additionally, inspect the mounting area and other parts periodically to prevent a wobbly or swaying rearview mirror.
Basic knowledge of side mirrors
- Definition: Side mirrors, also known as door mirrors, are installed on the outside left and right sides of the front seat doors. They are required to be installed according to safety standards.
- Role: Side mirrors help drivers check the status of following cars, monitor the surroundings when changing lanes or turning, assess the distance to obstacles and walls when parking, and determine the boundary line when entering a garage.
- Characteristics: Side mirrors provide a view of the right and left sides of the car body, aiding in driving, parking, and starting. They can be adjusted to an angle that is easy for the driver to see. However, it is important to avoid blind spots by adjusting the angle correctly.
- Correct position and adjustment: The driver's side mirror should show the ground about one-third to one-fourth of the time in the up and down field of vision, and the mirror should show the car body about one-quarter to one-fifth of the way in the left-right field of vision. The passenger side mirror should show the ground about half or one-third of the time in the up and down field of vision, and the mirror should show the car body about one-quarter of the way in the left and right field of vision.
- Maintenance and problems: Side mirrors can get dirty or dull due to rain or snow. Regular cleaning is important to maintain visibility. There are also options such as hydrophilic mirrors, heated door mirrors, and applying coating materials to prevent fogging or improve water repellency. If there are any issues with the side mirrors, such as failure to move, noise, or damage, it is recommended to consult a dealer or retailer.
Installation standards for automobile mirrors in laws and regulations
The installation standards for automobile mirrors are regulated by Article 44 of the Safety Standards of the Road Vehicles Act. Some key points include:
- Mirrors installed on the outside of the car body should have a structure that can cushion the impact in case of contact with a pedestrian.
- Mirrors installed inside the car should have a structure that allows them to fall off to prevent injury to occupants in the event of an accident.
- Mirrors should be installed in a way that their function is not impaired by vibration during driving.
- Mirrors should be easy to adjust and maintain a constant direction.
- Mirrors should allow the driver to check the status of vehicles up to 50 meters behind the driver's seat.
Summary
Rearview mirrors and side mirrors are essential for safe driving and parking. Rearview mirrors provide visibility behind the car, while side mirrors help drivers monitor the sides and rear of the car. It is important to adjust the mirrors correctly and maintain them regularly for clear visibility. Additionally, there are installation standards and regulations for automobile mirrors to ensure safety.
Please note that the information provided is based on the given article and may not include the most up-to-date information.
