WO2023100802A1

WO2023100802A1 - Vehicle-cabin mirror

Info

Publication number: WO2023100802A1
Application number: PCT/JP2022/043756
Authority: WO
Inventors: 寺西豊幸; 下川洋平; 井上雄太; 辻大介; 千葉和喜
Original assignee: 日本板硝子株式会社
Priority date: 2021-11-30
Filing date: 2022-11-28
Publication date: 2023-06-08

Abstract

Provided are: a vehicle-cabin mirror that has high durability and that can maintain the appearance and light reflective performance thereof over a long period; and a vehicle-cabin mirror device. A vehicle-cabin mirror (10) is supported at the periphery thereof by a frame member (20), and can be switched between a usage state in which a mirror surface (10a) is visible and a non-usage state in which the mirror surface (10a) is not visible. The vehicle-cabin mirror comprises: a glass sheet (10A) that has a first surface (11), which is the mirror surface (10a), and a second surface (12) on the side opposite from the first surface (11), and that has a light reflective layer (10C) disposed on the second surface (12); and an antifouling layer (10B) that covers at least a portion of the first surface (11).

Description

cabin mirror

The present invention relates to a vehicle interior mirror used in the interior of a vehicle.

Conventionally, vehicle interior mirrors used in the interior of vehicles such as automobiles and trains are known (see Patent Documents 1 and 2, for example). A vehicle interior mirror device having this vehicle interior mirror is also called a so-called vanity mirror, and is attached to a sun visor or a table of a vehicle.

The vehicle interior mirror described in Patent Document 1 is supported by a frame member ("fixed sun visor" in the document) of a sun visor of an automobile, and configured to be rotatable via a shaft member ("support rod" in the document). It is This vehicle interior mirror is provided with a movable sun visor that is slidable with respect to a fixed sun visor, and the movable sun visor is provided with a lid that can be opened and closed, and the mirror surface is exposed through an opening formed by opening the lid.

The passenger compartment mirror described in Patent Document 2 is supported by a frame member on the back of the backrest of a train seat on the side of the next seat, and is held by Velcro (registered trademark) provided on the surface of the frame member. The attached mirror surface cover can be opened and closed. In this vehicle interior mirror, the angle of the mirror surface can be changed by removing the mirror surface cover and rotating the upper hinge of the frame member.

Japanese Patent Application Laid-Open No. 2004-175293 Japanese Patent Application Laid-Open No. 2003-312348

Vehicle interior mirrors are protected by lids and mirror covers to prevent foreign substances such as dust and finger marks from adhering to them, but the more frequently they are used, the more foreign substances tend to adhere and the light reflection performance of the mirror deteriorates. Therefore, frequent cleaning such as wiping is required. Conventional vehicle interior mirrors have exposed glass, and frequent wiping or the like tends to scratch the surface, impairing the aesthetic appearance and deteriorating the light reflection performance.

Therefore, there is a demand for a highly durable vehicle interior mirror that can maintain its beauty and light reflection performance over a long period of time.

A feature of the vehicle interior mirror according to the present invention is that the periphery is supported by a frame member, and the vehicle interior mirror can be switched between a use state in which the mirror surface is visible and a non-use state in which the mirror surface is not visible. a glass plate having a first surface on the side of the mirror surface and a second surface opposite to the first surface, and a light reflecting layer formed on the second surface; and an antifouling layer that covers at least a part of it.

Vehicle interior mirrors that can be switched between in use and non-use are less likely to be contaminated with foreign matter such as dust and fingerprints than exterior mirrors, which are always in use. A countermeasure was taken to provide a mirror surface cover to prevent adhesion of foreign matter. However, in recent years, due to changes in lifestyle such as the spread of telework, the frequency of using mirrors to maintain appearance even in the car has increased. There is concern that performance will be impaired.

Therefore, by providing an antifouling layer that covers at least a portion of the first surface, which is the mirror surface side, as in this configuration, it is possible to suppress deterioration in light reflection performance. If this antifouling layer is provided, for example, at the central portion of the mirror surface that is frequently used, it is possible to suppress adhesion of foreign matter and reduce the frequency of wiping. Furthermore, when the mirror surface is washed, the antifouling layer makes the glass plate less likely to be scratched, resulting in a highly durable vehicle interior mirror that can maintain its beautiful appearance and light reflection performance over a long period of time.

Another characteristic configuration is that the antifouling layer covers the entire area of the first surface.

By providing the antifouling layer over the entire first surface as in this configuration, it is possible to further suppress scratches on the glass plate during mirror cleaning.

Another characteristic configuration is that the use state and the non-use state can be switched by rotating the frame member.

As in this configuration, by rotating the frame member, switching between the use state in which the mirror surface appears and is visible and the non-use state in which the mirror surface is hidden and invisible is highly convenient. A vehicle interior mirror having an antifouling layer is useful because it is conceivable that a hand may come into contact with the mirror surface when the frame member rotates.

Another characteristic configuration is that the frame member is a rotatable sun visor via a shaft member fixed to the vehicle body.

By using a car interior mirror with an antifouling layer as a sun visor, as in this configuration, the mirror surface with high light reflection performance can be used to comfortably adjust one's appearance while blocking sunlight.

Another characteristic configuration is that the frame member is a table that is rotatable via a shaft member fixed to the in-vehicle equipment.

As in this configuration, if a vehicle interior mirror with an antifouling layer is provided on the table, it is possible to use both the table and the mirror, which is highly convenient. In particular, the vehicle interior mirror of this configuration is useful for luxury vehicles.

Another characteristic configuration is that the on-vehicle equipment is a storage box, and the frame member is stored in the storage box in the non-use state.

As in this configuration, if the frame member is stored in the storage box when not in use, there are many cases where the mirror surface is touched when the frame member is put in and taken out. is.

Another characteristic configuration is that the frame member is provided on the back surface of the backrest of the seat on the side of the succeeding seat, and a rotatable table is provided on the back surface, and the table rotates. Therefore, the state of use and the state of non-use can be switched.

If a passenger compartment mirror with an antifouling layer is installed on the back of the seat backrest on the side of the next seat, as in this configuration, the occupants of the next seat will be able to comfortably dress themselves with the highly reflective mirror surface. can be arranged. In addition, by rotating the table, if it is possible to switch the vehicle interior mirror with the antifouling layer between the use state and the non-use state, for example, when holding a web conference with a personal computer placed on the table, etc. It is useful for the usage scene to arrange. In particular, the vehicle interior mirror of this configuration is useful for luxury vehicles.

Another characteristic configuration is that the frame member is rotatable via a shaft member fixed to the lid of the storage box.

As in this configuration, if the frame member is rotatable via the shaft member fixed to the lid of the storage box, when the lid of the storage box is opened while small items are stored in the storage box, the frame member It is very convenient because the mirror surface can be visually recognized by rotating the .

Another characteristic configuration is that the frame member is provided with a cover that covers the mirror surface, and the state of use is obtained by moving the cover.

By providing a cover that covers the mirror surface as in this configuration, it is possible to reduce the frequency of cleaning and further increase the durability of the vehicle interior mirror.

Another characteristic configuration is that the frame member is not provided with a cover that covers the mirror surface, and the mirror surface is exposed.

Even with a vehicle interior mirror without a cover that covers the mirror surface like this configuration, the light reflection performance can be maintained for a long period of time by providing the antifouling layer.

Another characteristic configuration is that the antifouling layer contains a silicon-containing fluorine-based compound.

If the antifouling layer contains a silicon-containing fluorine-based compound as in this configuration, it will have excellent antifouling properties and chemical resistance.

Another characteristic configuration is that the antifouling layer contains a metal material.

If the antifouling layer contains a metal material as in this configuration, the antibacterial properties are also excellent.

Another characteristic configuration is that the metal material is copper.

If the antifouling layer contains copper as in this configuration, the antibacterial properties will be even better.

Another characteristic configuration is that the antifouling layer includes an underlying layer on the first surface side.

If the antifouling layer includes a base layer as in this configuration, it becomes possible to firmly adhere the antifouling layer to the glass plate, and the peeling strength can be increased.

Another characteristic configuration is that the antifouling layer contains silica.

If the antifouling layer contains silica as in this configuration, the adhesiveness to the glass plate is enhanced, and the wear resistance against frequent wiping can be enhanced.

A characteristic configuration of a vehicle interior mirror device according to the present invention is that it includes any one of the vehicle interior mirrors described above and the frame member that supports the periphery of the vehicle interior mirror.

The vehicle interior mirror device of this configuration can achieve the same effects as described above.

1 is a front view of a vehicle interior mirror device; FIG. FIG. 2 is a cross-sectional view taken along line II-II of FIG. 1; It is an example which shows the sun visor provided with the mirror for a passenger compartment. It is an example which shows the sun visor provided with the mirror for a passenger compartment. It is an example which shows the seat provided with the mirror for a passenger compartment. It is an example which shows the seat provided with the mirror for a passenger compartment. It is an example which shows the seat provided with the mirror for a passenger compartment. FIG. 3 is a schematic plan view showing the interior of the vehicle; It is an example which shows the storage box provided with the mirror for a passenger compartment. It is an example which shows the storage box provided with the mirror for a passenger compartment. It is an example which shows the storage box provided with the mirror for a passenger compartment. It is a front view of the mirror apparatus for vehicle interiors which concerns on other embodiment.

An embodiment of a vehicle interior mirror according to the present invention will be described below based on the drawings. However, without being limited to the following embodiments, various modifications are possible without departing from the scope of the invention.

As shown in FIGS. 1 and 2 , the vehicle interior mirror device 1 includes a vehicle interior mirror 10 and a frame member 20 that supports the periphery of the vehicle interior mirror 10 . The vehicle interior mirror 10 is supported by a frame member 20 at its periphery, and is configured to be switchable between a use state in which the mirror surface 10a is visible and a non-use state in which the mirror surface 10a is not visible.

The interior mirror 10 includes a glass plate 10A having a first surface 11 on the side of the mirror surface 10a and a second surface 12 opposite to the first surface 11, and a protective cover covering at least a portion of the first surface 11. and a dirty layer 10B. The antifouling layer 10B in this embodiment covers the entire first surface 11 of the glass plate 10A. A light reflecting layer 10C is formed on the second surface 12 of the glass plate 10A.

As the glass plate 10A, a known glass for mirrors can be used, for example, soda-lime glass. As shown in FIG. 1, the glass plate 10A of this embodiment is formed in a rectangular shape. Peripheral portions along four sides of the rectangular glass plate 10A are supported so as to be embedded in the frame member 20 . The thickness of the glass plate 10A is preferably 1.5 mm or more and 5 mm or less, and more preferably 2 mm or more and 3 mm or less. If the thickness of the glass plate 10A is less than 1.5 mm, the strength as a mirror is reduced. Not only that, it goes against the weight reduction of the vehicle and the fuel efficiency deteriorates.

The antifouling layer 10B contains a silicon-containing fluorine-based compound. Examples of silicon-containing fluorine compounds include fluorine-substituted alkyl group-containing organosilicon compounds, alkoxysilane terminal-modified perfluoropolyethers, fluorine-containing silane compounds, perfluoropolyether alkoxysilanes, fluorine-based alkoxysilanes, and fluoroalkyl oligomer-substituted trimethoxysilanes. etc., and fluorine-based alkoxysilanes are preferred. More specifically, the antifouling layer 10B is an antifouling film made of a compound containing -OC ₃ F ₆ - groups and SiOMe ₃ groups in the molecule. Since the antifouling layer 10B contains a silicon-containing fluorine-based compound, it has excellent antifouling properties and chemical resistance.

The antifouling layer 10B preferably contains a metal material in addition to the silicon-containing fluorine compound. Metal materials include copper, silver, zinc, or alloys thereof, with copper being preferred. If the antifouling layer 10B contains a metal material, it will have excellent antibacterial properties. Examples of the method of including the metal material in the antifouling layer 10B include a method of adding a nitrate to the solution containing the silicon-containing fluorine-based compound described above. These metal ions are taken into the antifouling layer 10B, and antifouling properties as well as antibacterial and antiviral properties can be imparted.

Antifouling layer 10B preferably includes a base layer on the first surface 11 side of glass plate 10A. The underlying layer includes an oxide layer, preferably a SiO ₂ layer. Thus, if the antifouling layer 10B contains the base layer, it becomes possible to firmly adhere the antifouling layer 10B to the glass plate 10A, and the peeling strength can be increased. As this base layer, a deposited film of SiO ₂ , a film formed using a hydrolyzable silane compound, or the like is used.

The antifouling layer 10B may contain silica (SiO ₂ or a silicon compound composed of SiO ₂ ). If the antifouling layer 10B contains silica in this way, the adhesiveness to the glass plate 10A is enhanced, and the wear resistance against frequent wiping can be enhanced.

Examples of the method for forming the antifouling layer 10B include spin coating, squeegee coating, wet coating, vacuum deposition, and sputtering. A spin coating method is most preferable from the viewpoint of wear resistance and antifouling property. Further, when the light reflecting layer 10C is formed or taken out, the first surface 11 of the glass plate 10A may be contaminated with dirt, oil, and the like. This contamination may deteriorate the adhesion of the antifouling layer 10B to the first surface 11 of the glass plate 10A. Abrasive cleaning with an agent is preferred. By forming the antifouling layer 10B on the polished and cleaned first surface 11 by a spin coating method, it is possible to prevent deterioration of wear resistance and antifouling properties after abrasion. After that, the glass plate 10A having the antifouling layer 10B formed thereon may optionally be subjected to a post-treatment of holding at a high temperature (50° C. to 150° C.) (for 10 minutes to 100 minutes). As this post-treatment, for example, the glass plate 10A on which the antifouling layer 10B is formed is held at 100° C. for 30 minutes. By performing this post-treatment, the wear resistance of the antifouling layer 10B can be further enhanced.

The thickness of the antifouling layer 10B is preferably 1 nm or more and 200 nm or less, more preferably 80 nm or more and 170 nm or less. If the thickness of the antifouling layer 10B is less than 1 nm, durability such as abrasion resistance is reduced, and if it is greater than 200 nm, light scattering increases in the antifouling layer 10B, which makes the antifouling layer 10B look white. The abrasion resistance test of the antifouling layer 10B was carried out by attaching a dry flannel cloth (No. 300) to a reciprocating abrasion tester (“HEIDEN-18” manufactured by Shinto Kagaku Co., Ltd.) and applying a polishing pressure of 300 g/cm ² for 3000 reciprocations. Let In the antifouling property test of the antifouling layer 10B, (1) the initial diffuse reflectance was measured, and (2) 10 μL of a test liquid containing oleic acid and heptane at a ratio of 75:25 was applied to the antifouling layer 10B. 3 drops are dropped on the surface of , and a dry cloth flannel cloth (No. 300) is attached to a reciprocating wear tester (“HEIDEN-18” manufactured by Shinto Kagaku Co., Ltd.) and a load of 1 kg / 4 cm ² is applied 50 times. (3) Next, replace the flannel cloth (No. 300) with a new one and reciprocate it further 50 times, and (4) measure the diffuse reflectance after the test. Diffuse reflectance is measured in the range of 290 to 810 nm using a UV-visible near-infrared spectrophotometer (manufactured by Shimadzu Corporation "UV-3100PC") and a multi-purpose large test chamber (manufactured by Shimadzu Corporation "MPC-3100"). measured, and the difference Δ in diffuse reflectance before and after the test (the absolute values of (1) to (4) above) may be 2.0 or less, preferably 1.0 or less, and more preferably 0.5. It is below.

The light reflecting layer 10C is a metal film made of silver or silver alloy and copper. The copper film is provided to prevent corrosion of the silver film. Methods for forming the light reflecting layer 10C include, for example, an electroless plating method, a vacuum deposition method, a sputtering method, and the like.

The light reflecting layer 10C may include a protective layer on the outer side (the side away from the second surface 12). The protective layer is formed, for example, by applying urethane resin or by sputtering transfer. This urethane resin has a high waterproof performance and a higher chemical resistance than the alkyd resin used as the conventional protective layer. For this reason, even if the vehicle interior mirror 10 is washed repeatedly and the chemical solution enters, the durability can be maintained. Note that the protective layer may be formed using a phthalate resin, an acrylic resin, a silicon resin, a fluororesin, an epoxy resin, or the like.

As described above, the vehicle interior mirror 10 that can be switched between the use state and the non-use state has a lower frequency of adhesion of foreign substances such as dust and fingerprints than the vehicle exterior mirror that is always in use, and is usually cleaned by wiping. Since the frequency is low, a countermeasure was taken to provide a mirror surface cover to prevent foreign matter from adhering. However, in recent years, due to changes in lifestyle such as the spread of telework, the frequency of using mirrors to maintain appearance even in the vehicle interior has increased. There is a concern that the light reflection performance will be impaired.

Therefore, by providing the antifouling layer 10B that covers at least a portion of the first surface 11 on the side of the mirror surface 10a as in the present embodiment, it is possible to suppress the deterioration of the light reflection performance. If this antifouling layer 10B is provided, for example, at the central portion of the mirror surface 10a that is frequently used, it is possible to suppress adhesion of foreign matter and reduce the frequency of wiping. Furthermore, the antifouling layer 10B prevents the glass plate 10A from being scratched when the mirror surface is washed, so that the vehicle interior mirror 10 is highly durable and can maintain its beautiful appearance and light reflection performance over a long period of time. Moreover, by providing the antifouling layer 10B over the entire first surface 11 as in the present embodiment, it is possible to further prevent the glass plate 10A from being scratched during mirror cleaning.

An example of installation of the vehicle interior mirror device 1 will be described below with reference to FIGS. 3 to 11. FIG.

The vehicle interior mirror device 1 shown in FIGS. 3 to 11 has a use state in which the mirror surface 10a appears and becomes visible due to the rotation of the frame member 20, and a non-use state in which the mirror surface 10a hides and becomes invisible. and can be switched between. Switching between the use state and the non-use state of the vehicle interior mirror 10 by rotating the frame member 20 in this manner is highly convenient. In addition, since there may be a case where a hand touches the mirror surface 10a when the frame member 20 is rotated, the vehicle interior mirror 10 provided with the antifouling layer 10B is useful.

In the vehicle interior mirror device 1 shown in FIGS. 3 and 4, the frame member 20 is a rotatable sun visor via a shaft member 22 fixed to the vehicle body. Thus, if the vehicle interior mirror 10 having the antifouling layer 10B is used as a sun visor, the sun can be blocked and the mirror surface 10a with high light reflection performance can comfortably keep one's appearance in order.

In the example shown in FIG. 3, the frame member 20 is not provided with a cover that covers the mirror surface 10a, and the mirror surface 10a is exposed. In the vehicle interior mirror device 1, the frame member 20 is positioned on the upper side so as not to block the driver's field of view in a normal state, and the mirror surface 10a is visible. Sunlight can be blocked by rotating the frame member 20 through the lower side. As described above, even if the vehicle interior mirror 10 does not have a cover that covers the mirror surface 10a, the antifouling layer 10B can maintain the light reflection performance for a long period of time.

In the example shown in FIG. 4, the frame member 20 is provided with a cover 21 that covers the mirror surface 10a. In a normal state, the vehicle interior mirror device 1 is in a state in which the frame member 20 is positioned on the upper side so as not to block the driver's field of vision, and the mirror surface 10a is covered with the cover 21 so as not to reflect light to the outside. When used as a sun visor, by rotating the frame member 20 via the shaft member 22, the frame member 20 can be positioned on the lower side to block sunlight, and the mirror surface 10a can be visually recognized by opening the cover 21. . By providing the cover 21 that covers the mirror surface 10a in this manner, it is possible to reduce the frequency of cleaning, and the durability of the vehicle interior mirror 10 can be further enhanced.

In the vehicle interior mirror device 1 shown in FIGS. 5 and 6, the frame member 20 is mounted via a shaft member 33 fixed to the rear surface 32 of the backrest 31 of the seat 3 (an example of vehicle-mounted equipment) on the side of the succeeding seat. It is a rotatable table 34 . By rotating the table 34, the table 34 can be switched between a retracted state along the back surface 32 and a horizontal state in which the table 34 is drawn backward from the back surface 32 and held horizontally. If the vehicle interior mirror 10 having the antifouling layer 10B is provided on the table 34 in this way, the table can be used for both the table and the mirror, which is highly convenient. In particular, the vehicle interior mirror 10 of this embodiment is useful for luxury vehicles.

In the example shown in FIG. 5, the frame member 20 is provided with a cover 35 that covers the mirror surface 10a, and the cover 21 is slid or opened to enter the use state. In the normal state of the vehicle interior mirror device 1, the table 34 is stored along the back surface 32. By opening the cover 21, the mirror surface 10a becomes visible, and the table 34 is rotated via the shaft member 33. The table 34 is placed in a horizontal state by moving the table 34, and the table 34 can be used. By providing the cover 35 that covers the mirror surface 10a in this way, it is possible to reduce the frequency of cleaning, and the durability of the vehicle interior mirror 10 can be further enhanced.

In the example shown in FIG. 6, the frame member 20 is not provided with a cover that covers the mirror surface 10a, and the mirror surface 10a is exposed. In the normal state of the vehicle interior mirror device 1, the table 34 is in a stored state along the back surface 32, and the mirror surface 10a cannot be visually recognized. , the table 34 can be used, and the mirror surface 10a becomes visible. As described above, even if the vehicle interior mirror 10 does not have a cover that covers the mirror surface 10a, the antifouling layer 10B can maintain the light reflection performance for a long period of time.

In the passenger compartment mirror device 1 shown in FIG. By rotating the table 34, it is possible to switch between a use state in which the mirror surface 10a appears and can be visually recognized and a non-use state in which the mirror surface 10a is hidden and cannot be visually recognized. It is In this embodiment, the frame member 20 that supports the mirror surface 10a is supported by the back surface 32, and the rotation of the table 34 causes the table 34 to be retracted along the back surface 32 and to be pulled out rearward from the back surface 32. It can be switched to a horizontal state held horizontally. In the normal state of the vehicle interior mirror device 1, the table 34 is in a stored state along the back surface 32, and the mirror surface 10a cannot be visually recognized. , the table 34 can be used, and the mirror surface 10a becomes visible. In addition, it is preferable that the vehicle interior mirror 10 in this embodiment is configured so that the tilt angle of the mirror surface 10a can be changed via a hinge.

In this way, if the passenger compartment mirror 10 having the antifouling layer 10B is provided on the rear surface 32 of the backrest 31 of the seat 3 on the side of the rear seat, the person sitting in the rear seat can use the mirror surface 10a with high light reflection performance. You can comfortably groom yourself. Further, if the vehicle interior mirror 10 provided with the antifouling layer 10B can be switched between the use state and the non-use state by rotating the table 34, for example, a WEB conference can be held with a personal computer placed on the table 34. It is useful for occasions when you want to keep yourself groomed. In particular, the vehicle interior mirror 10 of this embodiment is useful for luxury vehicles.

In the vehicle interior mirror device 1 shown in FIGS. 8 and 9, the frame member 20 is fixed to a storage box 41 (an example of in-vehicle equipment) arranged at a lateral position of the rear seat 4 or at an intermediate position in front of the rear seat 4. The table 34 is rotatable via a shaft member 33 that is formed. In the example shown in FIG. 8, the storage box 41 at the left side position of the rear seat 4 or the right side position of the rear seat 4, or the storage box 41 at the left or right side of the box table at the front middle position of the rear seat 4 is used. A table 34 is stored. As shown in FIG. 9, by rotating the table 34 via the shaft member 33, the stored state in which the table 34 is stored in the storage box 41 in the unused state and the table 34 in the stored state from the storage box 41 in the used state. It can be switched to a horizontal state in which it is pulled out and held horizontally. If the vehicle interior mirror 10 having the antifouling layer 10B is provided on the table 34 in this way, the table can be used for both the table and the mirror, which is highly convenient. In particular, the vehicle interior mirror 10 of this embodiment is useful for luxury vehicles.

In the example shown in FIG. 9, the storage box 41 on the right side of the rear seat 4 or the storage box 41 on the right side of the box table located in the middle position in front of the rear seat 4 is shown. The illustration is omitted because it can be used on the left side of the rear seat 4 or the left side of the storage box 41 on the front middle position of the rear seat 4. As shown in FIG. 9, the frame member 20 is not provided with a cover for covering the mirror surface 10a, and the mirror surface 10a is exposed. In the normal state of the vehicle interior mirror device 1, the table 34 is stored in the storage box 41 and the mirror surface 10a cannot be visually recognized. It becomes a horizontal state, the table 34 can be used, and the mirror surface 10a becomes visible. As described above, even if the vehicle interior mirror 10 does not have a cover that covers the mirror surface 10a, the antifouling layer 10B can maintain the light reflection performance for a long period of time. In particular, in this embodiment, when the table 34 is put in and taken out of the storage box 41, the mirror surface 10a is often touched, and the usefulness of providing the antifouling layer 10B is high. In the example shown in FIG. 9, the frame member 20 may be provided with a cover (not shown) that covers the mirror surface 10a, and the cover may be slid or opened to put it into use.

In the vehicle interior mirror device 1 shown in FIGS. 8 and 10 to 11, the frame member 20 is a storage box 42 (vehicle equipment) composed of a glove box or an accessory box provided between the seats 3 in the vehicle. For example, the table 34 is rotatable via a shaft member 33 fixed to the storage box 42 , or the shaft member 33 is rotatable via a shaft member 33 fixed to the lid 42 a of the storage box 42 . In the example shown in FIG. 8, a storage box 42 that also functions as a table 34 on which small items can be placed on the surface (upper surface) is provided between the seats 3. is placed in front of the In the example shown in FIG. 10, a mirror for a vehicle interior is provided with an antifouling layer 10B on a frame member 20 rotatable via a shaft member 33 fixed to a lid 42a of a storage box 42 constituted by a glove box in the vehicle. 10 are provided. In the example shown in FIG. 11 , a table 34 (frame member 20 ) rotatable via a shaft member 33 fixed to a storage box 42 composed of an accessory case provided between the seats 3 is provided with an anti-friction device. A passenger compartment mirror 10 with a dirt layer 10B is provided.

In the example shown in FIG. 10, when the frame member 20 is rotated via the shaft member 33 fixed to the lid 42a of the storage box 42 whose surface can be used as a table 34, the mirror surface 10a appears and becomes visible. state. Although the frame member 20 in this embodiment is not provided with a cover that covers the mirror surface 10a, the mirror surface 10a is hidden behind the table 34 when the frame member 20 is used as the table 34. FIG. In particular, in this embodiment, it is assumed that makeup is applied while looking at the mirror surface 10a that appears when the frame member 20 is rotated. is highly useful. Note that the mirror surface 10a may be provided on the surface of the table 34 as the frame member 20, or a cover (not shown) that covers the mirror surface 10a may be provided on the frame member 20, and the cover may be slid or opened to change the state of use. Also good.

In the example shown in FIG. 11, the surface (upper surface) of the storage box 42 can be used as the table 34, and when small items are stored inside the storage box 42, the mirror surface 10a is not visible and is in a non-use state. When the frame member 20 is rotated via 33, the mirror surface 10a appears and is ready for use. In this embodiment, the mirror surface 10a is often touched when small items are put in and taken out of the storage box 41, and the antifouling layer 10B is highly useful. Note that the mirror surface 10a may be provided on the surface of the table 34 as the frame member 20, or a cover (not shown) that covers the mirror surface 10a may be provided on the frame member 20, and the cover may be slid or opened to change the state of use. Also good.

In the examples (Examples 1 to 18) according to the present embodiment, a mirror manufactured by Himirror Co., Ltd. was used as the glass plate 10A (soda lime glass substrate with mirror: 300 mm × 300 mm × thickness 3 mm) including the light reflecting layer 10C. After polishing and cleaning the first surface 11 with cerium oxide, an antifouling layer 10B was formed using a fluorine-based solvent diluted solution obtained by diluting OPTOOL UD120 (manufactured by Daikin Industries, Ltd.). In Examples 1 to 11, the first surface 11 after washing was coated with a dilute fluorine-based solvent by spin coating and dried at 25° C. for 10 minutes or longer to form the antifouling layer 10B. Then, the first surface 11 and the cotton after cleaning were dripped with a diluted fluorine-based solvent, and the entire surface of the first surface 11 was wiped with the cotton (hand coating). Furthermore, in Examples 1 and 3 to 17, the glass plate 10A with the antifouling layer 10B formed thereon was held at 100° C. for 30 minutes.

In a comparative example, a mirror manufactured by Himirror Co., Ltd. was used as a glass plate 10A (soda lime glass substrate with mirror: 300 mm × 300 mm × thickness 3 mm) including a light reflecting layer 10C, and OPTOOL UD120 (manufactured by Daikin Industries, Ltd.) was diluted. An antifouling layer 10B was formed using a diluted fluorine-based solvent. In Comparative Example 1, the first surface 11 without polishing and cleaning was coated with a diluted fluorine-based solvent by a spin coating method, and in Comparative Example 2, after polishing and cleaning the first surface 11 with cerium oxide, the first surface 11 and The diluted fluorine-based solvent was dripped onto cotton, and the entire surface of the first surface 11 was wiped with the cotton.

As an abrasion resistance test of the antifouling layer 10B, a dry cloth flannel cloth (No. 300) was attached to a reciprocating abrasion tester ("HEIDEN-18" manufactured by Shinto Kagaku Co., Ltd.), and the polishing pressure was 300 g/cm ² for 3000 reciprocations. let me After the abrasion resistance test, the contact angle of water on the antifouling layer 10B was measured with 3 μL of water using a contact angle measuring device (“CA-DT” manufactured by Kyowa Interface Science Co., Ltd.). The contact angle of water may be 70° or more, preferably 80° or more, and more preferably 100° or more. The amount of change in contact angle is preferably 50° or less, preferably 30° or less, and more preferably 15° or less. It can be evaluated that the smaller the amount of change in the contact angle, the better the wear resistance.

As shown in Table 1, in Examples 1 and 2, the initial contact angle was 100° or more and the amount of change in contact angle was 15° or less, and in Comparative Example 1, the amount of change in contact angle was 61°. . From this result, it can be understood that the wear resistance can be ensured by forming the antifouling layer 10B by the spin coating method after polishing and cleaning regardless of the presence or absence of post-treatment.

Next, the variation in contact angle due to the antifouling layer 10B was evaluated. Table 2 shows the results of measuring the average value Ave and variance 3α of the contact angle at 5 measurement points with a pitch of 10 mm. The contact angle dispersion 3α may be 10° or less, preferably 7° or less, and more preferably 2° or less. It can be evaluated that the smaller the dispersion value, the better the antifouling property.

As shown in Table 2, in Examples 3 to 5, the average value Ave of the initial contact angle was 70°, although the concentration of the fluorine-based solvent diluted solution (the content of Optool) was small, as in Comparative Example 2. As described above, it can be seen that the dispersion 3α is 2° or less, and the antifouling property is excellent by applying by the spin coating method. On the other hand, as shown in Examples 12 to 18, it can be seen that, even in hand-coating, if the concentration of the fluorine-based solvent diluted solution is 0.05% by weight or more, the antifouling property is excellent. Further, as shown in Examples 17 and 18, no change in antifouling property was observed depending on the presence or absence of post-treatment.

Next, the change in reflectance due to the antifouling layer 10B was evaluated. With and without the antifouling layer 10B, the difference in visible light reflectance is preferably 1% or less, the difference in reflected color (a ^* , b ^* ) is 1.0 or less, and the diffuse reflectance is 1.0% or less. Preferably the difference is 1% or less. Diffuse reflectance is measured in the range of 290 to 810 nm using a UV-visible near-infrared spectrophotometer (manufactured by Shimadzu Corporation "UV-3100PC") and a multi-purpose large test chamber (manufactured by Shimadzu Corporation "MPC-3100"). It was measured and expressed as a percentage of the stimulus value Y with respect to the standard light A according to JIS Z8722. The visible light reflectance was measured using an ultraviolet-visible-near-infrared spectrophotometer manufactured by Shimadzu Corporation ("UV-3600i Plus" manufactured by Shimadzu Corporation) and a large multi-purpose test chamber ("MPC-603A" manufactured by Shimadzu Corporation). was measured in the range of 290 to 810 nm, and the stimulus value Y for standard light A was expressed as a percentage according to JIS Z8722. Also, the visible light reflection color (a ^* , b ^* ) was calculated according to JIS Z8781-4.

Table 3 shows the results of measuring diffuse reflectance, visible light reflectance, and reflected color (a ^* , b ^* ) with and without the antifouling layer 10B used in Example 1. It is shown. As shown in Table 3, it can be understood that there is no difference in reflection performance between the case with and without the antifouling layer 10B.

[Other embodiments]
(1) As shown in FIG. 12, the antifouling layer 10B of the interior mirror 10 may cover only the central region of the first surface 11 of the glass plate 10A. In this case, it is preferable that the glass plate 10A on which the antifouling layer 10B is not provided is covered with the frame member 20 . By providing the antifouling layer 10B only in the central region of the first surface 11, which is frequently used, both the reduction in manufacturing cost and the durability of the passenger compartment mirror 10 can be achieved.
(2) In the above-described embodiment, the vehicle interior mirror 10 is provided on the sun visor or the back of the seat.

The present invention can be used for a vehicle interior mirror used in the interior of a vehicle.

Reference Signs List 1: cabin mirror device 3: seat 10: cabin mirror 10A: glass plate 10B: antifouling layer 10C: light reflecting layer 10a: mirror surface 11: first surface 12: second surface 20: frame member 21: cover 22: Shaft member 31: Backrest 32: Back surface 33: Shaft member 34: Table 35: Cover 41: Storage box 42: Storage box 42a: Lid

Claims

A vehicle interior mirror whose periphery is supported by a frame member and which can be switched between a use state in which the mirror surface is visible and a non-use state in which the mirror surface is not visible,
a glass plate having a first surface on the side of the mirror surface and a second surface opposite to the first surface, the second surface having a light reflecting layer formed thereon;
and an antifouling layer that covers at least part of the first surface.
The vehicle interior mirror according to claim 1, wherein the antifouling layer covers the entire area of the first surface.
The vehicle interior mirror according to claim 1 or 2, wherein the use state and the non-use state are switchable by rotating the frame member.
The vehicle interior mirror according to claim 3, wherein the frame member is a rotatable sun visor via a shaft member fixed to the vehicle body.
The vehicle interior mirror according to claim 3, wherein the frame member is a rotatable table via a shaft member fixed to the in-vehicle equipment.
The vehicle interior mirror according to claim 5, wherein the in-vehicle equipment is a storage box, and the frame member is stored in the storage box in the non-use state.
The frame member is provided on the rear surface of the backrest of the seat on the side of the succeeding seat, and the rear surface is provided with a rotatable table. 3. The passenger compartment mirror according to claim 1, wherein the non-use state and the non-use state are switchable.
The vehicle interior mirror according to claim 3, wherein the frame member is rotatable via a shaft member fixed to the lid of the storage box.
The vehicle interior mirror according to any one of claims 1 to 8, wherein the frame member is provided with a cover that covers the mirror surface, and the state of use is set by moving the cover.
The vehicle interior mirror according to any one of claims 1 to 8, wherein the frame member is not provided with a cover that covers the mirror surface, and the mirror surface is exposed.
The vehicle interior mirror according to any one of claims 1 to 10, wherein the antifouling layer contains a silicon-containing fluorine-based compound.
The vehicle interior mirror according to claim 11, wherein the antifouling layer contains a metal material.
The vehicle interior mirror according to claim 12, wherein the metal material is copper.
The vehicle interior mirror according to any one of claims 11 to 13, wherein the antifouling layer includes a base layer on the first surface side.
The vehicle interior mirror according to any one of claims 11 to 14, wherein the antifouling layer contains silica.