JP3323691B2 - Mounting structure of electric circuit board for driving electric display element in anti-glare mirror - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an anti-glare mirror for automobiles having a variable reflectivity using an electric display element such as an EC (electrochromic) element or a liquid crystal element.
It relates a driving circuit board of an electrical display element structure for incorporation into anti-glare mirror, reducing the number of parts, easier assembly work, in which so as to downsizing or the like of the body shape.

[0002]

2. Description of the Related Art In an anti-glare mirror having a variable reflectivity using an electric display element such as an EC element or a liquid crystal element,
It is necessary to incorporate a driving circuit board for driving the electric display element into the anti-glare mirror.

FIG. 2 shows the structure of a conventional anti-glare inner mirror. 2A is an exploded perspective view, and FIG. 2B is a sectional view of an assembled state. In the variable reflectivity mirror 12, an electric display element such as an EC element or a liquid crystal element is wired on the entire mirror surface, and the reflectivity is variable by electrically driving the electric display element. A wiring 14 for supplying a drive voltage to the electric display element is drawn out of the variable reflectivity mirror 12, and a connector 16 is connected to a tip of the wiring. A scattering prevention tape 1 is provided on the back of the variable reflectance mirror 12 to prevent scattering when the mirror 12 is broken.
8 (adhesive tape) is stuck.

[0004] The electric circuit board 20 includes a variable reflectivity mirror 1.
Electronic components, electrical components, and the like for driving the second electric display element are disposed on a substrate, and include a light receiving element (a front optical sensor, a rear optical sensor, etc.), a control circuit, a drive circuit, and the like. . A wiring 22 for supplying a drive voltage to the electric display element of the variable reflectance mirror 12 is drawn out from the front surface of the electric circuit board 20, and a connector 24 is connected to a tip of the wiring 22. A wiring 26 is drawn out from the back surface of the electric circuit board 20, and a connector 28 is connected to a tip of the wiring 26.

[0005] The switch section 30 is for switching the operation mode of the anti-glare mirror, and includes an auto switch 32, a night switch 34, and a day switch 36. The auto switch 32 is a switch for automatically changing the reflectance based on the detection of the light receiving element, the night switch 34 is a switch for fixing the reflectance to a low state, and the day switch 36 is a switch for fixing the reflectance to a high state. The switch section 30 is attached to the stay 40 by screws 38. Wirings 42 and 44 are drawn out from the switch unit 30, and connectors 46 and 48 are connected to their ends, respectively.

When assembling the anti-glare mirror 10 shown in FIG. 2, first, the pivot 50 at the lower end of the stay 40 is inserted into the hole 54 of the body 52, and is attached to a bracket 56 inside the body 52 so as to be swingable. The switch unit 30 is fixed to 40 with screws 38. The switch cover 60 is put on the switch unit 30. Next, connectors 46 and 4
After connecting the electric circuit boards 20 to each other,
It is fixed to the boss 54 formed in 2 with a screw 57. Further, the connector 16 of the variable reflectivity mirror 12 to which the scattering prevention tape 18 is adhered and the connector 24 of the electric circuit board 20 are connected, and the variable reflectivity mirror 12 is
And a ring (visor portion) 58 is fitted to the peripheral edge of the front opening to fix and hold the variable reflectance mirror 12, thereby completing the process. A connector 48 that goes out of the stay 40 to the outside is connected to a connector of the vehicle-side harness.

[0007]

The anti-glare mirror 10 shown in FIG. 2 has a structure in which the electric circuit board 20 is attached to the body portion 52. Therefore, when the electric circuit board 20 is screwed to the body portion 52, If the electric circuit board 20 and the variable reflectivity mirror 12 are connected, it hinders screwing work. Therefore, wires (22, 14) connecting the electric circuit board 20 and the variable reflectivity mirror 12 are connected to the connectors 24, 1 respectively.
6 requires a structure for cutting, and requires a large number of parts. Also, after the electric circuit board 20 is attached to the body 52, the wires 22 and 14 are required to be long to some extent to connect the connectors 24 and 16 to each other (if they are short, the hand is inaccessible). Extra wiring (22, 14) to and from the circuit board 20 has to be accommodated in a narrow space in the body 52.

Further, since the electric circuit board 20 is screwed to the boss 54 in the body 52 at a plurality of places (for example, four places), it takes a long time to mount the board. Further, since the boss 54 is required for attachment, the body portion 52 becomes thick, the body portion becomes large, and the body design is not flexible. Also, the electric circuit board 20 is
As a result, the electronic parts and the solder part of the electric circuit board 20 may be stressed, which causes a reduction in reliability.

The present invention solves the above-mentioned problems in the prior art, and aims at reducing the number of parts, facilitating the assembling work, reducing the size of the body shape, improving the freedom of the body design, and improving the reliability. and it is intended to provide a mounting structure of an electric circuit element for driving an electric circuit board in the anti-glare mirror.

[0010]

According to the first aspect of the present invention,
Electrically driving an electric display element wired on a mirror surface
Back of variable reflectivity mirror with variable reflectivity
An electric circuit for driving the electric display element via a fixing member
Circuit board is attached, and the fixing member
It is attached to the back of the reflection mirror and the locking means is formed on the back
And the locking means is provided with the electric circuit.
The electric circuit board is fitted to a predetermined portion of the
It is mounted on the back of a variable reflectance mirror.

According to a second aspect of the present invention, the variable reflectivity mirror has a protruding electrode terminal for power supply protruding in the rear direction thereof, and the protruding electrode terminal is connected to the electrode terminal on the electric circuit board side. Is directly connected to.

[0012]

SUMMARY OF] According to the present invention Symbol placement, since the structure for attaching the electric circuit board on the back of the variable reflectance mirrors,
The electric circuit board can be mounted on the body in a state where the electric circuit board is mounted on the back surface of the variable reflectance mirror in advance. Therefore, the variable reflectivity mirror and the electric circuit board can be connected in advance by wiring, the connector between the variable reflectivity mirror and the electric circuit board can be eliminated, and the wiring between them can be shortened. Can be. In addition, it is not necessary to screw the electric circuit board to the body part at a plurality of places. Instead, the electric circuit board can be easily attached to the back of the variable reflectivity mirror directly or through an adhesive or an adhesive fixing member. , Which facilitates the assembly work. In addition, since the electronic circuit board can be mounted without using screws, stress is not applied to the electronic circuit board, and the reliability is improved. Further, since no mounting boss is required in the body portion, the body portion can be made thinner and smaller, and the degree of freedom in body design can be increased.

Further, if a pre-fixed plate to the back of the variable reflectance mirror mounting with an adhesive or an adhesive, is possible to attach the electric circuit board by one-touch by using a locking means formed on the fixed plate it can. In addition, the electric circuit board can be easily removed, and maintenance is easy. Further, electronic components can be mounted on both sides of the electric circuit board, and lead products can also be used.

According to the second aspect of the present invention, a protruding electrode terminal is formed on the variable reflectance mirror so as to protrude in the rear direction thereof, and the protruding electrode terminal is not used as an electrode terminal on the electric circuit board side without using a cable. Since the structure is such that the electric circuit board is directly connected, the mounting position of the electric circuit board is easily determined, and the assembling work is facilitated. In addition, since no cable is used, the connection operation is easy.

[0015]

EXAMPLES (Example 1) FIG an Example of relevant anti-glare rearview mirror with the present invention
3 is shown. This is one in which the fixing member is composed of only an adhesive. 3A is an exploded perspective view, and FIG. 3B is a sectional view of an assembled state. Note that the same reference numerals are used for portions common to the conventional structure of FIG.

In the variable reflectivity mirror 12, an electric display element such as an EC element or a liquid crystal element is wired over the entire mirror surface, and the reflectivity is variable by electrically driving the electric display element. .

FIG. 4 shows an enlarged sectional view of the variable reflectance mirror 12 in the thickness direction when the electric display element is constituted by an EC element. The variable reflectivity mirror 12 has an ITO film (transparent electrode film) 66 and an EC film 6 on the back surface of a glass substrate 64.
8. The structure is such that an aluminum film (reflection film / electrode film) 70 is laminated and sealed with a sealing resin 71 and a sealing glass 72.

The electric circuit board 20 is adhered to the back of the variable reflectivity mirror 12 with an adhesive 72 interposed therebetween.
The clip electrodes 78 and 80 respectively fitted on the upper side and the lower side of the variable reflectivity mirror 12 constitute electrode terminals of the electrode films 66 and 70, respectively. These clip electrodes 78,
One end of each of the wirings 14 is connected to 80 by soldering or the like. The multiple ends of the wirings 14 are connected to electrode terminals of the electric circuit board 20 by soldering or the like. By applying a voltage between the electric circuit board 20 and the electrode films 66 and 70 via the wiring 14, the coloring amount of the EC film 68 is controlled, and the reflectance is variably controlled.

In FIG . 3 , an electric circuit board 20 is a component such as an electronic component or an electric component for driving the electric display element of the variable reflectivity mirror 12 (hereinafter referred to as “electronic component or the like”).
21 is provided on a substrate, and includes a light receiving element (a front optical sensor, a rear optical sensor, etc.), a control circuit, a drive circuit, and the like. The wiring 26 is drawn out from the electric circuit board 20, and a connector 28 is connected to the end thereof.

The switch section 30 is for switching the operation mode of the anti-glare mirror, and includes an auto switch 32, a night switch 34, and a de-switch 36. The switch section 30 is attached to the stay 40 by screws 38. Wirings 42 and 44 are drawn out from the switch unit 30, and connectors 46 and 48 are connected to their ends, respectively.

When assembling the anti-glare mirror 62 shown in FIG . 3 , the body part 52 is inserted into the hole 54 of the body part 52 by inserting the pivot 50 at the lower end of the stay 40 into the body part 5.
The switch unit 30 is fixed to the stay 40 with the screw 38 so as to be swingable on the bracket 56 inside the unit 2.

On the other hand, on the side of the variable reflectance mirror 12, a sheet-like adhesive 72 is attached to the back surface thereof, and this adhesive 72
The electric circuit board 20 is attached to the back of the device. One end of the wiring 14 is connected to the electrode terminal of the reflectivity variable mirror 12 in advance by soldering or the like. After attaching the electric circuit board 20, the other end of the wiring 14 is soldered to the electrode terminal of the electric circuit board 20. And so on.

After that, the connectors 46 and 28 are connected to each other to connect the wirings 42 and 26. Finally, the variable reflectivity mirror 12 is accommodated in the front opening of the body 52, and a ring is formed around the periphery of the front opening. (Visor section) 58 is mounted to fix and hold the variable reflectance mirror 12, thereby completing the process. Stay 40
A connector 48 that comes out of the vehicle is connected to a connector of the vehicle-side harness.

According to the above configuration, the electric circuit board 20 can be easily attached to the variable reflectance mirror 12 with the adhesive 72. Further, the electric circuit board 20 and the variable reflectivity mirror 12 can be directly connected without using a connector, and the wiring 14 between them can be short. Further, since the electric circuit board 20 is not screwed, no stress is applied to the electric circuit board 20, and the reliability is improved. Further, even if there is a difference in thermal expansion between the electric circuit board 20 and the reflectance variable mirror 12, the adhesive 72 can absorb the difference. Further, the adhesive 72 can also serve as the scattering prevention means. Further, since a mounting boss is not required for the body portion 52, the body portion 52 is not required.
Can be made thin and small, and the degree of freedom of body design can be improved.

In the above reference example, an adhesive was used.
Instead, a double-sided adhesive tape or an adhesive (for example, an adhesive having elasticity) can be used.

[0026] (Example 1) shows the actual施例of the present invention in FIG. This anti-glare mirror 77
In this figure, an electric circuit board is mounted using a fixing plate. That is, the fixing plate 76 is adhered to the rear surface of the variable reflectance mirror 12 via the adhesive 74 (or an adhesive (for example, an adhesive having elasticity)). The fixing plate 76 is made of, for example, a resin, the front surface of which is formed as a flat surface, and the locking hook 78 is formed on the back surface. On the other hand, a locking hole 80 is formed in the electric circuit board 20. By fitting the locking hook 78 into the locking hole 80, the electric circuit board 20 can be removably attached to the back of the variable reflectance mirror 12.

According to the above configuration, since the electric circuit board 20 can be removed, maintenance is easy. In addition, electronic components and the like can be mounted on both sides of the electric circuit board 20, and lead products (parts in which holes are made in the electric circuit board 20, terminal leads are inserted, and soldering is performed on the opposite side of the inserted circuit board). Can be used.

(Embodiment 2 ) FIG. 5 shows another embodiment of the present invention. In FIG.
(A) is a sectional view of an assembled state, and (b) is an enlarged view of a sectional structure of a variable reflectance mirror in a thickness direction thereof.
In the anti-glare mirror 83, the electrode terminals of the variable reflectivity mirror 12 in the structure of FIG. 1 are constituted by protruding electrode terminals, and a cable (wiring 14 in FIG. 1 ) is not used as a terminal on the electric circuit board side . They are directly linked. That is, rigid protruding electrode terminals 82 and 84 are fixed to the upper and lower clip electrodes 78 and 80 of the variable reflectivity mirror 12 so as to protrude in the rear direction of the variable reflectivity mirror 12. 84 a is inserted into hole-shaped electrode terminals 86, 88 formed at predetermined positions of the electric circuit board 20, and the variable reflectance mirror 12 and the electrode terminals of the electric circuit board 20 are electrically connected. The terminal ends 82a, 84a and the electrode terminals 86, 88 are connected by soldering or the like. According to the above configuration, since no cable is used, connection is easy.

In the first and second embodiments, the electric circuit board 20 is connected to the variable reflectance mirror 12 with an adhesive or an adhesive.
However, by constructing a connection structure for directly mechanically connecting the electric circuit board 20 and the variable reflectance mirror 12 to the electric circuit board 20, it is also possible to directly attach the electric circuit board 20 without using an adhesive or an adhesive.

[0030] (Reference Example 2) shows another reference example in connection with the present invention in FIG. this is,
The sealing glass 72 (sealing member) also serves as an electric circuit board. That is, a conductive film 94 is formed on the back surface of the sealing glass 72 by spin coating, a vacuum film forming method, or the like, and the conductive film 94 is formed into a predetermined circuit pattern by etching. On the conductive film 94, a resist 96 is used as an insulating film (solder mask) by screen printing or the like to prevent the conductive film 94 from contacting other parts and short-circuiting to the terminals of the electronic components 21 and the like. A film is formed except for a portion to be attached, and is hardened by a thermosetting treatment. Electronic components 21 and the like are mounted on the insulating film 96. The terminals of the electronic components 21 are connected by soldering to predetermined positions (portions exposed from the insulating film 96) of the circuit pattern formed by the conductive film 94, thereby forming a drive circuit of the electric display element. The terminals of this drive circuit and the clip electrodes 78 and 80 are connected by electrode terminals 90 and 92, respectively.

[0031]

As described in the foregoing, according to the invention of claim 1 Symbol placement, since the structure for attaching the electric circuit board on the back of the variable reflectance mirror, electrical circuitry on the back of the previously variable reflectance mirror substrate Can be incorporated into the body part with attached. Therefore, the variable reflectivity mirror and the electric circuit board can be connected in advance by wiring, the connector between the variable reflectivity mirror and the electric circuit board can be eliminated, and the wiring between them can be shortened. Can be. In addition, it is not necessary to screw the electric circuit board to the body part at a plurality of places. Instead, the electric circuit board is directly or via a fixing member such as an adhesive or an adhesive on the back of the variable reflectance mirror. It can be easily attached and the assembling work becomes easy. In addition, since the electronic circuit board can be mounted without using screws, stress is not applied to the electronic circuit board, and the reliability is improved. Further, since no mounting boss is required in the body portion, the body portion can be made thinner and smaller, and the degree of freedom in body design can be increased.

Further, if a pre-fixed plate to the back of the variable reflectance mirror mounting with an adhesive or an adhesive, is possible to attach the electric circuit board by one-touch by using a locking means formed on the fixed plate it can. In addition, the electric circuit board can be easily removed, and maintenance is easy. Further, electronic components can be mounted on both sides of the electric circuit board, and lead products can also be used.

According to the second aspect of the present invention, a protruding electrode terminal protruding in the back direction is formed on the variable reflectance mirror, and this protruding electrode terminal is not used as an electrode terminal on the electric circuit board side without using a cable. Since the structure is such that the electric circuit board is directly connected, the mounting position of the electric circuit board is easily determined, and the assembling work is facilitated. In addition, since no cable is used, the connection operation is easy.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing a first embodiment of the present invention, and a sectional view in an assembled state.

FIG. 2 is an exploded perspective view showing a conventional structure and a sectional view in an assembled state.

FIG. 3 is an exploded perspective view showing a reference example related to the present invention;
It is a figure and sectional drawing of an assembly state.

FIG. 4 is a diagram when an electric display element is configured by an EC element;
The sectional structure of the variable-reflectance mirror 12 is enlarged in the thickness direction.
FIG.

FIG. 5 is an exploded perspective view showing a second embodiment of the present invention, and a sectional view in an assembled state.

FIG. 6 is a sectional view showing another reference example related to the present invention.

[Description of Signs] 12 Reflectivity variable mirror 20 Electric circuit board 62, 77, 83 Anti-glare mirror 72 Fixing member (adhesive) 74, 76 Fixing member (adhesive, fixing plate) 78 Locking means (locking hook) 82, 84 Protruding electrode terminals on electric circuit board side 86 Electrode terminals on variable reflectivity mirror side

Continuation of the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) B60R 1/04 G02B 5/08

Claims (2)

(57) [Claims] 1. An electric circuit board for driving an electric display element via a fixing member on a rear surface of a variable reflectivity mirror configured to change the reflectivity by electrically driving an electric display element wired on a mirror surface. Ri make installation and the said fixing member, Installing the back of the reflectance reflection mirror
And a fixed plate with locking means formed on the back.
And the engaging means is fitted to a predetermined portion of the electric circuit board.
Then, the electric circuit board is moved to the back of the variable reflectivity mirror.
The mounting structure of the electric circuit board for driving the electric display element in the anti-glare mirror attached to the device. 2. The variable-reflectance mirror has a protruding electrode terminal for power supply protruding in the rear direction thereof, and the protruding electrode terminal is directly connected to the electrode terminal on the electric circuit board side. A mounting structure for an electric circuit board for driving an electric display element in the anti-glare mirror according to claim 1 .