JPS6223626Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an automatic actuating device for a sun visor.

The device according to the present invention is used, for example, in a vehicle such as an automobile, when automatically driving a light shielding plate for preventing dazzle in the driver's front view.

In general, when cars, trains, ships, etc. move towards the sun in the morning and evening, the driver is directly exposed to light, so it is necessary to ensure visibility from the obstruction caused by glare and to ensure proper driving operation. A light-shielding plate is installed above the driver's seat window glass, and the light-shielding plate is operated depending on the driver's perception of glare to prevent glare. Especially in the case of a car, when suddenly exposed to direct light on a slope or curved road,
It is often necessary to place a light-shielding plate in a predetermined position while driving while being dazzled, and the dazzling makes it difficult to follow the road, coupled with the unstable operation of driving with one hand, making it difficult to stop suddenly. However, there is a problem in that it can lead to an unsafe situation, which is accompanied by danger. On the other hand, recently, it has become more difficult to operate the light shielding plate than before because of the need to wear seatbelts. Although the light shielding plate is important for preventing dazzle, there is a problem in that it does not perform its function quickly depending on the situation.

In view of the problems with the conventional type described above, the purpose of the present invention is to detect the amount of glare by ergonomically reducing glare by using the difference between the amount of light at approximately the driver's eye level and the amount of light outside the front of the driver's seat. Based on the idea that the light shielding plate can be set, detect the amount of glare, automatically place the light shielding plate in a light shielding position, and store it in a designated position when it is not needed.
The objective is to properly automatically operate the light shielding plate.

In the present invention, a first optical sensor is provided with a photosensitive section facing downward at approximately the level above the driver's eyes;
The second model has a photosensitive section mounted forward facing in front of the driver.
an optical sensor, an arithmetic device that compares output signals of the first and second optical sensors to calculate a value representing glare, a light-shielding plate drive device supplied with the output signal of the arithmetic device, and the drive device. Provided is an automatic actuating device for a light shielding plate, which is provided with a light shielding plate that is driven by the driver and placed at a driver's light shielding position, thereby automatically controlling the position of the light shielding plate.

An automatic actuating device for a shade plate as an embodiment of the present invention is shown in FIGS. 1 and 2. FIG. FIG. 2 is a circuit diagram of the device shown in FIG.

An optical sensor 1 made of a photodiode, a phototransistor, a CdS, etc. is arranged above the windshield in front of the driver's seat of an automobile 8 with its photosensitive section facing in the direction of travel. On the other hand, the optical sensor 3 is mounted on the ceiling above the driver's eye level with the photosensitive section facing downward. The outputs of the optical sensors 1 and 3 are amplified by amplifiers 51 and 52 of the calculation drive unit 5 to a predetermined gain, that is, to a level that is not affected by external noise. A variable resistor 53 provided on the optical sensor 3 side is used to set the glare from an ergonomic perspective. The outputs of amplifier 51 and variable resistor 53 are input to comparator 54. The absolute values of the sensitivity outputs x' and y' of the optical sensors 1 and 3 have a relationship of |x'|≫|y'| due to the relationship between light received outside the vehicle and light received inside the vehicle. For this reason,
Since it is necessary to set the input y to the comparator 54 on the amplifier 52 side to a lower limit value that causes glare, the output gains of the amplifiers 51 and 52 are set so that the amplifier 51 << the amplifier 52. That is, in a non-dazzling state, the input levels x and y to the comparator 54 normally maintain the relationship x<<y. The variable resistor 53 is for fine adjustment of glare sensitivity. Therefore, when the relationship x>y is established, the comparator 54 outputs the saturation voltage Z, and the relay 55
The contact is activated to the make side, the DC motor 6 is driven, and the light shielding plate 7 directly connected to the DC motor 6 is set to the light shielding position. Note that when the input relationship to the comparator 54 becomes x<y, it goes without saying that the relay 55
The contact acts on the break side, and a voltage of the opposite phase is applied to the DC motor 6, so that the light shielding plate 7 is housed in the normal position. Note that when the light shielding plate reaches the light shielding position and the storage position, the power supply to the DC motor 6 is cut off by a limiter switch disposed on the drive shaft of the motor 6.

As shown in FIG. 1, the optical sensor 1 is placed above the window of the car with its photosensitive part facing the direction of travel of the car 8, and the optical sensor 3 has its photosensitive part placed on the ceiling at approximately the position of the driver's eyes. It is placed facing downward. Note that, like the optical sensor 1, the optical sensor 2 is disposed at the same position on the vertical plane as the optical sensor 1 at the bottom of the window with the photosensitive portion facing forward, and is used in a modified embodiment. Outputs from each of the optical sensors 1 and 3 are inputted via wires 41 and 43 to an arithmetic drive unit 5 in which an arithmetic circuit, a drive relay, a micro switch, and the like are integrated. The output of the arithmetic drive section 5 drives a DC motor 6 integrated with the arithmetic drive section 5, whereby the light shielding plate 7 directly connected to the DC motor 6 is driven to a predetermined position.

A circuit diagram of an automatic shading plate operating device according to another embodiment of the present invention is shown in FIG. An optical sensor 1 consisting of a photodiode, a phototransistor CdS, etc. is attached to the upper part of the windshield in front of the driver's seat, and an optical sensor 2 is attached to the lower part, with the sensor opening facing forward in both cases. On the other hand, the optical sensor 3 is attached to the ceiling above the steering wheel in the driver's seat with the sensor opening facing downward. The outputs of optical sensors 1, 2, and 3 are output to amplifiers 501, 502, and 50, respectively.
It is amplified by 3. The amplified outputs a and b of the forward-facing optical sensors 1 and 2 are added by an adder 504, and then divided by 1/2 by a divider 505 to obtain an output of x. That is, the average value of optical sensors 1 and 2 is obtained by (a+b)÷2=x. As a matter of course, the external light-receiving optical sensors 1 and 2 usually obtain a much higher light-receiving sensitivity output than the internal light-receiving optical sensor 3. Therefore, in a non-dazzling state, the output gains of the divider 505 and the amplifier 503 are
5 << Amplifier 503, and subtracter 5
Normally, the input levels of x and y to 06 are set so that x≈y. Therefore, when the input level to the subtracter 506 has a relationship of x>y, the output z of the subtracter 506 becomes the result of x-y, and this z becomes the glare signal. The glare signal z is a Schmitt circuit 508
The relay 509 for the rotary solenoid 9 is activated, which outputs the signal only when the glare signal level is higher than the Schmitt level set as the glare signal level and drives the light shielding plate 7 to the light shielding position.

The above is a series of automatic operations, but when manually operating the light shielding plate, use the manual switch 507.
Do more. That is, when the light shielding plate is placed in the light shielding position, the relay 509 is actuated directly, and when the light shielding plate is not automated or when the light shielding plate is removed from the light shielding position, a bias in phase opposite to the Schmitt level is applied to the Schmitt circuit 508. Manual switch 507
input on the off side.

In the circuit shown in Fig. 3, by placing optical sensors 1 and 2 at the upper and lower positions of the front window, the light incident on a slope is sensed as an average value regardless of whether it is climbing or descending, and the relative light sensor with the indoor light sensor is detected. By comparison, it is possible to detect glare with human senses. That is, z in x-y=z may be set to a low output that is perceived as dazzling from an ergonomic point of view, and may be used as the threshold level of the Schmitt circuit 508. Further, the drive angle of the rotary solenoid 9 can be arbitrarily set by the angle at which the light shielding plate is lowered or raised.

A circuit diagram of an automatic shading plate operating device according to another embodiment of the present invention is shown in FIG. The sensing holes of the forward-facing upper optical sensor 1 and the forward-facing lower optical sensor 2 are directed forward, and the outputs obtained from the light emitted from the front are amplified by amplifiers 511 and 512, respectively, and added by an adder 514. Post divider 5
The average value x of optical sensors 1 and 2 is obtained by dividing 1/2 by 16. On the other hand, the output of the optical sensor 3 mounted on the ceiling of the room, with the sensing hole facing downward, approximately at the driver's eye level, is amplified by an amplifier 513, and a variable resistor 5 is used to set the glare sensitivity.
15, obtain the output of y via the adder 517. Outputs x and y obtained from the respective systems of external optical sensors 1 and 2 and internal optical sensor 3 are input to a comparator 518. In this case, the relationship x+y is set so that the absolute value is |×|≦|y| in a normal state where there is no glare. Therefore, in a dazzling condition, the input sensitivity of x and y to the comparator 518 is x>y
As a result, the saturation voltage z is output, the relay 537 is activated, and the DC motor 6 is energized.
An automatic control circuit is configured to jump down the light shielding plate 7 connected to the drive shaft of the DC motor 6 to a predetermined position when it is judged to be dazzling, and to raise the light shielding plate 7 when it is no longer dazzling. Note that the manual switch 531 is used when changing the automatic mode to manual mode or when automatically excluding the light shielding plate 7 from being in the light shielding position. That is, by turning on the manual switch 531, the relay 537 is directly operated regardless of the level of the output z of the comparator 518, and the light shielding plate 7 can be placed in the light shielding position. In addition, when excluding the light shielding plate 7 from being in the light shielding position, a predetermined voltage is applied to the adder 517 by turning the manual switch 531 to the off side, and is added to the output voltage of the variable resistor 515. to get the output of y. In this case, comparator 518
Since the input to the relay 53 becomes a state of x<y
No output z is generated that could activate 7. Therefore, the DC motor 6 automatically returns the light shielding plate 7 to the storage position. Therefore, as a matter of course, when the manual switch 531 is in the OFF state, it does not function as an automatic device, and only the manual switch 531 can close the light shielding plate 7.
cannot operate.

Note that the manual switch 531 referred to here is a switch that can hold three positions (on, off, and on) in various commonly used operating switches, and is arranged as shown in Fig. 5, with the movable contact at the neutral point. In the case of NU, the automatic control circuit is in a functional state. If you do not want to operate the automatic control circuit, turn the movable contact to the OFF contact and apply a voltage to the power supply 54 that will cause the output signal y of the adder 517 to be greater than the x signal.
1 causes it to be applied to the adder 517, and the comparator 518
Since the output z cannot be obtained, the 4-pole relay 5 has make and break contacts with 2 poles each (A ₁ , A ₂ ; B ₁ , B ₂ ).
37 drive coil 537a is not excited, and the contacts of the relay 537 are closed on the break sides _B1 and _B2 , and in this case, the power is applied to the DC motor 6 by the power source 542 in the direction to accommodate the light shielding plate 7. Therefore,
When the light shielding plate 7 is in the light shielding position, the DC motor 6 is driven in the storage direction, and when the light shielding plate 7 is in the predetermined storage position, the limit switch 535 is activated by the eccentric cam 62 connected and connected to the drive shaft 61 of the DC motor 6. The contacts are opened and the DC motor 6 is maintained in a state where no current is applied.

On the other hand, when the movable contact of the manual switch 531 is turned to the fixed contact ON side, the drive coil 537a of the relay 537 is excited by the power supply 542 regardless of the output z of the comparator 518, so the contact of the relay 537 is turned on the make side. A ₁ and A ₂ are closed, DC motor 6
A voltage in the opposite direction to the former is applied to turn the light-shielding plate 7 in the light-shielding direction, and when the light-shielding plate 7 reaches a predetermined light-shielding position, the contact of the limit switch 536 is opened by the eccentric cam 62, and the current to the DC motor 6 is cut off. The light-shielding plate 7 is placed in a light-shielding position while maintaining the hanging state. Therefore, when the movable contact of the manual switch 531 is in the NU position, it constitutes an automatic control circuit, and when operating the light shielding plate 7 by manual operation, by turning the movable contact to the on/off side of the fixed contact,
It can be made to function arbitrarily.

A sketch of the integrated structure of the device of the present invention is shown in FIG. DC connected integrally with calculation drive unit 5
A part of the motor 6 and the light shielding plate 7 are shown. Arithmetic drive unit 5
An operating lever 532 of a manual switch 531 is projected to a position where it can be easily operated, and a display 533 indicating the operating position is provided.

FIG. 7 shows a cross-sectional view of the calculation drive unit 5 shown in FIG. 6, and is a sketch of the internal arrangement. A manual switch 531, a relay 537, and an arithmetic unit 538 in which the arithmetic unit 5a shown in FIG. 4 are integrated into one chip.
Lever 535a, 536 of limit switch 535 and 536 operated by eccentric cam 62 connected to the drive shaft of DC motor 6
a is shown respectively.

The devices shown in Figures 1 and 2 have the advantage that the driver does not have to manually place the light-shielding plate in the light-shielding position each time the incident light becomes dazzling, allowing the driver to concentrate on driving. . This advantage is particularly noticeable when suddenly exposed to light while driving on a slope, a curved road, or at high speed. Figures 1 and 2
In the device shown in the figure, the brightness can be set not by the uniform degree of incident light from the front, but by a relative comparison between the brightness at approximately the position of the driver's eyes and the degree of light incident from the front. The arrangement and storage of the light-shielding plate can be automatically set to match the characteristic values unique to each driver, very closely resembling the sense of the driver. In the devices shown in FIGS. 1 and 2, since the light shielding plate is not larger than that in the conventional case, the strength of the vehicle mounting portion and the mounting method may be the same as in the conventional method.

In the devices shown in Figures 1 and 2, the electronic control circuit is extremely compact, so it is easy to integrate it with the drive source, such as a small electric motor or rotary solenoid. can be placed. In addition, since a variety of combinations of glare detection methods, drive devices, and light blocking methods can be made, various choices can be made depending on customer preferences, cost, constraints on installation location, aesthetics of the driver's seat, etc. Is possible.

According to the present invention, the automatic operation of the light shielding plate is properly performed.

[Brief explanation of drawings]

Fig. 1 is a diagram showing an automatic actuation device for a light shielding plate as an embodiment of the present invention, Fig. 2 is a diagram showing a circuit of the device shown in Fig. 1, and Figs. 3 and 4 are respective examples of other embodiments. Figure 5 is a diagram showing details of the automatic/manual switching circuit in the device of Figure 4, Figures 6 and 7 are
This figure shows a part of the structure of the apparatus shown in FIG. 4, and FIG. 7 shows a cross section taken along the line -- in FIG. 6. 1, 2, 3... optical sensor, 41, 42, 43...
... Wiring, 5 ... Arithmetic drive section, 51, 52 ... Amplifier, 53 ... Variable resistor, 54 ... Comparator, 55
... Relay, 6 ... Motor, 7 ... Light shielding plate, 8 ...
…car.

Claims (1)

[Scope of utility model registration request] a first optical sensor with a photosensitive section mounted facing downward above the level of the driver's eyes; a second optical sensor with a photosensitive section mounted facing forward in front of the driver;
and a calculation device that compares the output signals of the second optical sensor to calculate a value representing glare, a light-shielding plate drive device that is supplied with the output signal of the calculation device, and a light-shielding plate drive device that is driven by the drive device to shield the driver from light. An automatic actuating device for a light shielding plate, which is provided with a light shielding plate placed at a certain position, thereby automatically controlling the position of the light shielding plate.