CN1657341A - Rearview Mirror - Google Patents

Abstract

The invention discloses a rearview mirror, which comprises a main body, a frame, and two front and rear pieces of glass fixed between the frame and the main body. The two pieces of glass are sealed by a sealant to form a cavity, and an electrochromic material is installed in the cavity. , The front glass is strengthened glass with high strength, and the rear glass is ordinary glass with low strength. The rear glass can be used as a buffer device to absorb impact energy. When a strong external force hits the rearview mirror, the impact energy will be transmitted from the front to the rear, and the weaker rear glass will be broken to absorb the impact energy of the above external force, thereby protecting the surface of the front glass from being broken.

Description

Rearview Mirror

【Technical field】

The invention relates to an automobile rearview mirror, in particular to a rearview mirror with relatively high safety performance.

【Background technique】

As a necessary accessory of a car, the rearview mirror has higher and higher requirements for its safety performance. For example, the stricter European standards require that the car should not cause serious damage to the occupants of the car when it is hit by a certain amount. . As shown in Figure 1, it is the experimental schematic diagram of current European standard when testing rearview mirror safety performance, rearview mirror 5 is installed on the fixed platform by deck 52, and deck 52 is connected with rearview mirror body 53 by support bar 56 Two ends of the support rod 56 are respectively provided with rotating shafts 51 , and the front of the body 53 has a frame 54 snapped on the body 53 , and the glass lens 55 is clamped between the frame 54 and the body 53 . The test equipment is a pendulum 6. The pendulum 6 includes a rotating shaft 62 fixing the pendulum 6 and a spherical hammer 61 at the end of the pendulum 6. The spherical hammer 61 is made of hard rubber with a certain weight and hardness. When carrying out the experiment, the spherical hammer 61 rotates upwards at an angle of 60 degrees, and then the spherical hammer 61 is allowed to rotate freely. When the spherical hammer 61 moves to the lowest position, it just hits the center of the glass lens 55 of the rearview mirror 5. If the glass If the surface of the glass lens 55 is broken, then the rearview mirror 5 may produce broken fragments in an actual vehicle accident, causing serious injury to personnel, and thus cannot pass the safety test. If the surface of the glass lens 55 is not broken, Then you can pass the security test. Before this current standard, the test method of the European standard is to tilt the rearview mirror support rod obliquely upward to form a certain angle with the horizontal plane. Rotate around the rotating shaft at the end, and then offset part of the impact energy, so the direct impact force of the spherical hammer 61 on the glass lens 55 is relatively small. Under this standard, the safety performance requirements for the rearview mirror are relatively low. General rearview mirrors are relatively easy to pass the safety test, but under the current standards, most rearview mirrors cannot all pass the safety test.

At present, more advanced cars will choose to use electrochromic rearview mirrors. The characteristic of this rearview mirror is that when the rear light received by it reaches a certain contrast with the surrounding ambient light, the rearview mirror will automatically darken. so that the reflected light from the rearview mirror will not overly irritate the driver's eyes so that he can see the reflected image in the rearview mirror clearly. The difference between this kind of electrochromic rearview mirror and ordinary rearview mirror is that it uses an electrochromic mirror surface. Its related previous technology is disclosed in US Patent No. 4,712,879, No. 4,741,603, No. 5,818,625 and No. 6,535,322. reveal. The basic structure of this electrochromic mirror is shown in Figure 2, including two pieces of glass 81, 83 at the front and back. The color-changing material, under the control of different currents, the electrochromic material can change the transmittance of light, and then control the reflectivity of the rearview mirror. The rear surface of the rear glass 83 is provided with a reflective layer 84 for reflecting incident light and a back paint layer 85 for protecting the coating film on the reflective layer 84 . Due to the use of two-layer glass structure, and limited to the weight and volume of the rearview mirror, the thickness of each layer of glass is smaller than that of ordinary rearview mirrors. If there is no special arrangement, this electrochromic rearview mirror It is particularly vulnerable to shattering when subjected to impact, making it difficult to pass safety tests. In order to improve the strength of the electrochromic mirror, some people choose to use stronger strengthened glass as the substrate of the front and rear glass, but the price of strengthened glass is generally several times that of ordinary glass, and the cost is high. , under the current high standard European safety test conditions, it is also difficult to pass the test.

【Content of invention】

The purpose of the present invention is to provide a rearview mirror with high safety performance, which will not break the lens surface and will not hurt people in the car when it is impacted.

In order to achieve the above object, the present invention adopts the following technical scheme: the rearview mirror includes a body, a frame, and two front and rear sheets of glass that are accommodated and fixed between the frame and the body, and the two sheets of glass are sealed by a sealant to form a cavity. The middle is equipped with electrochromic materials, the front glass is strengthened glass with high strength, and the rear glass is ordinary glass with low strength. The rear glass can be used as a buffer device to absorb impact energy. When a strong external force hits the rearview mirror, the impact energy will be transmitted from the front glass to the rear glass, and because the strength of the rear glass is weaker than that of the front glass, the rear glass will break and absorb the impact energy of the above-mentioned external force, thereby protecting the mirror. The front glass will not shatter.

Compared with the prior art, the rearview mirror of the present invention has the following beneficial effects: since the front and rear two sheets of glass respectively adopt reinforced glass with higher strength and ordinary glass with lower strength, when subjected to a strong impact, the impact energy will be reduced due to The breakage of the rear glass located in the rearview mirror body is absorbed without causing shattered fragments on the front surface of the rearview mirror, thereby improving the safety performance of the rearview mirror, and by using lower-cost ordinary glass It is also possible to reduce the manufacturing cost of the rearview mirror.

【Description of drawings】

Figure 1 is a schematic diagram of the current European standard when testing the safety performance of rearview mirrors.

Fig. 2 is a structural schematic diagram of an electrochromic lens of an existing electrochromic rearview mirror.

Fig. 3 is a structural schematic diagram of the electrochromic lens of the automobile rearview mirror of the present invention.

Fig. 4 is a schematic front view of the automobile rearview mirror of the present invention.

Fig. 5 is an A-A line sectional view of the automobile rearview mirror shown in Fig. 4 .

【Detailed ways】

Please refer to Fig. 3 to shown in Fig. 5, the preferred embodiment of automobile rearview mirror of the present invention is a kind of electrochromic rearview mirror, comprises body 3, frame 2 and utilizes frame 2 to be fixed in the electrochromic in body 3 Lens 1. The parts where the frame 2 and the body 3 are in contact with the electrochromic lens 1 are fixing parts 21 and 31 respectively. The electrochromic lens 1 includes two pieces of transparent glass 11, 13 at the front and the back. The two pieces of glass 11, 13 are sealed by a sealant 12 to form a cavity 16, and the cavity 16 is equipped with an electrochromic material. In this case, the electrochromic material can change the transmittance of light, thereby controlling the reflectivity of the rearview mirror. The rear surface of the rear glass 13 is provided with a reflective layer 14 for reflecting incident light and a back paint layer 15 for protecting the coating film on the reflective layer 14 . Wherein the front glass 11 is strengthened glass, its impact strength is greater, not easy to break; and the rear glass 13 is ordinary glass, its impact strength is lower, relative to the front glass 11, the rear glass 13 is easier to break.

When an external force hits the electrochromic lens 1 (for example, during the aforementioned safety test or when an actual car accident occurs), the impact energy generated by the external force is first applied to the front glass 11, and then passes through the electrochromic material in the cavity 16. Pass on to rear glass 13. Since the electrochromic material is a liquid or gel-like material, when impact energy is applied to the rearview mirror, only a small part of the energy is through the elastic deformation of the electrochromic material and its surrounding sealant 12 Most of the energy will be absorbed by the front glass 11 and the rear glass 13 itself, and because the external force first acts on the front glass 11, the impact energy borne by the front glass 11 is greater than that of the rear glass 13. The impact energy withstood is greater. When the impact force is small and does not exceed the impact limit of the rear glass 13 made of ordinary glass, the two sheets of glass will not break; and when the impact energy exceeds the impact limit of ordinary glass, because the impact strength of the rear glass 13 The impact strength of the front glass 11 is low, so the rear glass 13 will break earlier than the front glass 11 . Fracture of the rear glass 13 can absorb most of the impact energy caused by the impact. In this way, the impact energy received by the front glass 11 will be greatly reduced without causing broken fragments on the surface of the lens 1 . After adopting this design, the safety performance of the rearview mirror is greatly increased compared with the use of two pieces of ordinary glass or two pieces of reinforced glass at the same time. Even if the rearview mirror is strongly impacted and the rear glass 13 is broken, the front glass 11 will also Keep intact, and the fragments of the rear glass 13 will be accommodated in the cavity 16 of the body 3, and will not fall out of the body 3, so the safety of the occupants in the car will be well protected.

In order to increase the safety of the rearview mirror, in the second preferred embodiment of the automobile rearview mirror of the present invention, the fixed part 31 of the main body 3 is in contact with the rear surface of the rear glass 13 and the fixed part 21 of the frame 2 is in contact with the front glass 11. The part is set as the elastic buffer area, the formation of this area can be made of elastic rubber or any buffer material that can absorb impact energy. When an external force hits the front glass 11, the elastic buffer area can also absorb part of the energy, and Further improve the safety of the rearview mirror.

It can be understood that the device for absorbing impact energy in the rearview mirror can be the ordinary glass 13 arranged at the rear, or any one with relatively weak structural strength deliberately designed on the energy transmission path of external force impact. Impact energy absorber.

After adopting the automobile rearview mirror of the present invention, the safety performance of the rearview mirror is greatly improved, and the current safety test can be passed. And because one of the layers of glass is ordinary glass, the manufacturing cost of the rearview mirror is also reduced. Simultaneously, it should be understood that although the present invention is illustrated with an electrochromic rearview mirror as the best example, the same or similar structure of the present invention can also be applied to all parts and accessories that are arranged on automobiles and have fragile surfaces. For example: ordinary car interior mirrors, interior vanity mirrors, instrument panels, car liquid crystal displays or GPS displays, etc. The main difference is that in other application examples except electrochromic rearview mirrors, the front glass There is generally no cavity designed between the rear glass and the electrochromic material, but the high-strength first surface layer (front strengthened glass) and the low-strength second inner layer (rear ordinary glass) are usually bonded directly. glass) together.

Claims (27)

1. electrochromism back mirror, two eyeglasses before and after comprising, these two eyeglasses are closed the formation cavity by sealant, electrochromic material is housed in the cavity, it is characterized in that: be provided with at least one in the back mirror and be positioned at the device of mirror body outmost surface with the absorbed impact energy of external position, it is arranged on the path of impact energy transmission, and has the more weak intensity of other assembly on the aforesaid paths, so that this is installed on back mirror when being subjected to clashing into, can the stress strain responses and absorb the impact energy of bump back mirror, make the outmost surface of back mirror can not produce fragmentation.

2. electrochromism back mirror as claimed in claim 1 is characterized in that: preceding eyeglass is arranged at the outmost surface of back mirror, and its intensity greater than the back eyeglass intensity, this back eyeglass is the device that can absorb impact energy.

3. electrochromism back mirror as claimed in claim 2 is characterized in that: preceding eyeglass is constituted by toughened glass, and back eyeglass is constituted by simple glass.

4. as one of any described electrochromism back mirror of claim 1 to 3, it is characterized in that: the electrochromism back mirror also comprises body and frame, two eyeglasses in front and back are accommodated and are fixed between this frame and the body, and body is made as the elastic buffer district with the position that the back eyeglass contacts, and this elastic buffer district is made by the rubber-like padded coaming.

5. electrochromism back mirror as claimed in claim 4 is characterized in that: described elastic buffer district is an elastic caoutchouc.

6. as one of any described electrochromism back mirror of claim 1 to 3, it is characterized in that: the rear surface of back mirror is provided with reflecting horizon and back of the body enamelled coating.

7. back mirror, comprise body, frame and accommodate the eyeglass that is fixed between frame and the body, this eyeglass has specific reflectivity, can produce mirror surface image, it is characterized in that: be provided with the device that at least one can absorb impact energy in the back mirror, this is installed on back mirror when being subjected to clashing into, can absorb the impact energy of this back mirror of bump, so that the outside face of eyeglass is difficult for fragmentation.

8. back mirror as claimed in claim 7 is characterized in that: eyeglass is made up of front and back two sheet glass, and this two sheet glass is closed the formation cavity by sealant, and electrochromic material is housed in the cavity.

9. back mirror as claimed in claim 8 is characterized in that: the intensity of front glass is greater than the back glass intensity, and this back glass is the device that can absorb impact energy.

10. back mirror as claimed in claim 9 is characterized in that: front glass is a toughened glass, and back glass is simple glass.

11. as one of any described back mirror of claim 8 to 10, it is characterized in that: body is made as the elastic buffer district with the position of back glass contact, and this elastic buffer district is made by the material that can absorb impact energy.

12. back mirror as claimed in claim 11 is characterized in that: the material in described elastic buffer district is an elastic caoutchouc.

13. as one of any described back mirror of claim 8 to 10, it is characterized in that: the rear surface of back glass is provided with reflecting horizon and back of the body enamelled coating.

14. electrochromic device, two eyeglasses before and after comprising, these two eyeglasses are closed the formation cavity by sealant, electrochromic material is housed in the cavity, it is characterized in that: be provided with the device that at least one can absorb impact energy in this electrochromic device, when this device is subjected to clashing at preceding eyeglass, can absorb the impact energy of this preceding eyeglass of bump, so that preceding eyeglass is difficult for fragmentation.

15. electrochromic device as claimed in claim 14 is characterized in that: the intensity of preceding eyeglass is greater than the intensity of back eyeglass, and this back eyeglass is the device that can absorb impact energy.

16. electrochromic device as claimed in claim 15 is characterized in that: preceding eyeglass is a toughened glass, and back eyeglass is a simple glass.

17. as one of any described electrochromic device of claim 14 to 16, it is characterized in that: electrochromic device also comprises body and frame, two eyeglasses in front and back are accommodated and are fixed between this frame and the body, body is made as the elastic buffer district with the position that the back eyeglass contacts, and this elastic buffer district is made by the material that can absorb impact energy.

18. electrochromic device as claimed in claim 17 is characterized in that: described elastic buffer district is an elastic caoutchouc.

19. as one of any described electrochromic device of claim 14 to 16, it is characterized in that: the rear surface of back eyeglass is provided with reflecting horizon and back of the body enamelled coating.

20. light processor that is arranged on the vehicle; comprise first top layer and second nexine; it is characterized in that: the intensity on first top layer is greater than the intensity of second nexine; this first top layer and second nexine all are positioned on the transmission path of impact force action; when this impulsive force puts on this light processor and during greater than the breaking limit of second nexine; this second nexine can absorb the impact energy that this external force is applied with the destruction of its material, and protects aforementioned first top layer with higher-strength can not produce destruction.

21. light processor as claimed in claim 20 is characterized in that: this light processor can be in the room mirror, instrument carrier panel, Liquid Crystal Display (LCD), car in vanity mirror or the global location instrument telltale any.

22. light processor as claimed in claim 20 is characterized in that: this device is a kind of electrochromism back mirror.

23. light processor as claimed in claim 22 is characterized in that: first top layer of this device is the higher toughened glass of intensity, and second nexine then is the lower simple glass of intensity.

24. light processor as claimed in claim 23 is characterized in that: first top layer and second nexine be arranged in parallel, and periphery is closed the formation cavity with sealant, and electrochromic material is housed in the cavity.

25. light processor as claimed in claim 24 is characterized in that: this device also comprises body and frame, and the member after first top layer and the combination of second nexine is promptly accommodated and is fixed between this frame and the body.

26. light processor as claimed in claim 25 is characterized in that: the body of this device and frame and first top layer and second nexine in conjunction with after the position that contacts of structure be made as the elastic buffer district.

27. light processor as claimed in claim 26 is characterized in that: described elastic buffer district is made of elastic caoutchouc.

Images