JPH0234976Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a sun visor for a vehicle whose transparency can be adjusted.

[Prior Art] Generally, sun visors (shading plates) attached to the front of automobiles include those that use a light-shielding plate that completely blocks sunlight, or those that use a translucent plate that is colored blue or the like. Furthermore, a vehicle window has been proposed in which double transparent plates such as glass are provided so that a light-shielding liquid can be introduced and discharged between the transparent plates. (``Automobile window'', Japanese Patent Application Laid-open No. 56-21915).

[Problems to be Solved by the Invention] However, in a sun visor using a light-shielding plate that completely blocks sunlight, the view above and in front is completely blocked. In addition, sun visors or vehicle windows that use semi-transparent plates have a constant light blocking rate or light transmittance, so depending on the brightness outside the vehicle, visibility may become obscured due to light blocking. Put it away.

In view of the above-mentioned circumstances, the present invention was devised to provide a sun visor that can adjust the amount of light transmitted according to the brightness outside the vehicle and that can ensure forward and upward visibility.

[Means for Solving the Problems] The present invention forms two transparent plates having a housing section for housing a translucent fluid between the plates, and a hinge is attached to the lower end of these transparent plates, and a hinge is attached to the upper end of the transparent plates. Elastic members are provided in the housing section to bias the distance between the plates in a direction that reduces the distance between the plates, and a fluid transfer means is provided in the housing section to adjust the amount of fluid contained therein and to open and close the transparent plate. be.

[Function] With the above configuration, when it is very bright outside the vehicle, the fluid transfer means sends the fluid to the storage part to increase the light transmittance of the two transparent plates to prevent glare. The light transmittance decreases toward the bottom of the transparent plate,
Ensure forward visibility. Furthermore, when the brightness decreases, the introduction of fluid is stopped, and the elastic member closes the transparent plate to discharge the fluid and lower the light transmittance.

[Examples] Examples of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 shows an embodiment of a sun visor according to the present invention, and in particular is an exploded perspective view showing the structure of a transparent plate, which is a main part thereof.

The transparent plates 1 and 2 are made of two sheets of acrylic resin, glass, etc., and between them is provided a bag body 3, which is a housing section and is made of thin transparent rubber and has a wedge-shaped cross section.

As shown in FIG. 3, the bag body 3 contains a translucent liquid 1, and the peripheral edges of both sides of the bag body 3 are adhered to the transparent plates 1 and 2. As the translucent liquid 1, a washer liquid colored blue or the like is used.

A threshold-like hinge 4 is provided at the lower end of the transparent plates 1 and 2.
are provided and are respectively fitted into the grooves with the bag body 3 sandwiched therebetween. The hinge 4 is made of a flexible member such as transparent synthetic rubber, and the hinge 4 is made of a flexible member such as transparent synthetic rubber.
2 is configured such that its upper end can be opened and closed using the lower end supported by a hinge 4 as a fulcrum.

Furthermore, frames 5 and 6 each having a U-shaped cross section are fitted into the upper ends of the transparent plates 1 and 2, respectively. An arcuate leaf spring 7 is interposed between the frames 5 and 6, as shown in FIGS. 4 and 5. The end of the leaf spring 7 on the outside of the vehicle is fixed to one of the transparent plates 1 via the frame 5 with rivets. That is, the leaf spring 7 is configured to bias the transparent plates 1 and 2 in a direction that reduces the distance between the upper ends of the plates.

The end of the leaf spring 7 on the inside of the vehicle is formed into a tubular shape so that a pin 8 can be inserted therethrough, and is pivotally supported on the frame 6 via the pin 8. Also, the frame 5 on the outside of the vehicle
Hanging fittings 9 and 10 are attached to both ends of the housing for hanging the storage body consisting of the transparent plates 1 and 2, the bag body 3, etc., and the hanging fittings 9 and 10 are fixing fittings that are fixed to the roof above the window. 11 and 12.

As shown in FIG. 2, the hanging fitting 9 and one of the fixtures 11 are connected by a spherical joint so that they can be expanded approximately around the longitudinal axis of the frame 5. In addition, a cover 13 is provided on the top of the transparent plates 1 and 2.
is provided, and one side wall thereof is attached to one transparent plate 1.

As shown in FIG. 3, the bag body 3 contains a translucent liquid l
Fluid transfer means are provided for allowing fluid to enter and exit to adjust the amount accommodated as appropriate. That is, the joint 14 passes through the transparent plate 2 and is connected to the bag body 3, and the joint 14 is connected to a transfer pipe 15 for transferring the translucent liquid 1.

As shown in FIG. 6, the other end of the transfer pipe 15 is
It is inserted into a tank 16 that stores a translucent liquid l. The transfer pipe 15 is provided with a pump 17 for pumping the translucent liquid 1, and electromagnetic valves 18 and 19 are provided on its outlet and inlet sides to switch the flow paths, respectively. Furthermore, the transfer pipe 15
is provided with a branch pipe 20 that communicates between the transfer pipe 15 section on the transparent plates 1 and 2 side of the electromagnetic valve 18 and the electromagnetic valve 19, and a branch pipe 20 that communicates between the transfer pipe 15 section on the tank 16 side of the electromagnetic valve 19. A branch pipe 21 is provided that communicates between the electromagnetic valve 18 and the electromagnetic valve 18 . The pump 17 is equipped with a motor 22 and is adapted to be driven as appropriate. Also, the electromagnetic valve 18,
19, due to the excitation of the coils 18a, 19a, the valve bodies 18b, 19 are in the state shown by the broken line in the figure.
b is now in operation.

Further, in FIG. 6, 40 is a main switch for controlling the transfer of the semi-transparent liquid 1, and the circuit includes a switch 23 for flowing the semi-transparent liquid 1 into the bag 3, and a switch 23 for controlling the transfer of the semi-transparent liquid 1.
switch 24 for flowing out the translucent liquid l from
and is provided.

Then, when the switch 23 is turned on, contacts N and E are connected, and in conjunction with this, contacts H and G are connected.
The coil 26 of the switch 25 is energized and the motor 22 is activated. Also,
When switch 24 is turned on, contacts ``T'' and ``R'' and contacts ``N'' and ``L'' are connected, and switch 24 is turned on.
When the coil 27 of No. 5 is excited, the motor 22 is operated. Switch 25 is
This is a switch for operating the electromagnetic valves 18 and 19 to change the flow path of the translucent liquid 1.

As shown in FIG. 7, the switch 25 is rotatably provided with a lever 28 between coils 26 and 27. When the coils 26 and 27 are excited, the lever 28 is attracted and operated, and a spring 28 is attached to the tip of the lever 28.
The ball 30 is elastically biased by the grooves 31 and 3.
It is designed to stop when it fits into 1. When the lever 28 is actuated, the lever 33 of the limit switch 32 is actuated, and contacts A and B or C of the switch 32 are connected. Contact RO is an open contact.

Further, the switch 34 is an automatic switch for controlling the opening degree of the upper end portions of the transparent plates 1 and 2. That is, the switch 34 is operated even when the switches 23 and 24 are in the ON state, and is a switch for preventing excessive pressure from being applied to the pump 17 or damage to the cover 13 due to opening of the transparent plate 2.
The switch 34 has terminals C, M, and L, and as shown in FIG.
C is provided on the upper part of the transparent plate 2, and the terminal C
A terminal L is provided on the transparent plate 2 and a terminal M is provided on the cover 13 by fixing with rivets so as to sandwich the terminals.

Next, the operation of this embodiment will be explained.

First, to increase the degree of light shielding of the sun visor, press the switch 23 while the main switch 40 is in the ON state. When the switch 23 is turned on, the contacts 2 and 5 are connected, and the coil 26 of the switch 25 is energized, and the contacts 2 and 2 are connected, and the contacts 2 and 2 are connected.
The contacts connected to E and G are also connected, and the motor 22 is operated and the pump 17 is driven. By driving the pump 17, the translucent liquid l in the tank 16 flows into the bag body 3 through the transfer pipe 15. When the translucent liquid 1 flows into the bag 3, the internal pressure of the bag 3 increases, and the upper ends of the transparent plates 1 and 2 open around the hinge 4 in accordance with the amount of inflow. Therefore, the layer thickness of the translucent liquid l inside the bag body 3 increases, the degree of light shielding increases, and the amount of light incident into the vehicle interior decreases.

Next, a case will be described in which the amount of light shielded by the sun visor is reduced. In this case, switch 24 is pressed. When the switch 24 is pressed, contacts J and R are connected, and at the same time contacts N and R are also connected, and the motor 22
When the contacts 1 and 2 are connected, the coil 27 of the switch 25 is magnetized, and the lever 28 is operated toward the coil 27 side, and the lever 33 is activated.
is pressed and contacts A and C are connected. When contacts A and C are connected, the coils 18 of the electromagnetic valves 18 and 19
a and 19b are switched to the positions indicated by broken lines in the figure.

Therefore, by operating the pump 17, the translucent liquid 1 flows as shown by the broken line arrow in the figure. That is, the translucent liquid 1 flows out from the bag 3 and flows into the transfer pipe 1.
5, passing through the branch 20, and further electromagnetic valve 19,
The branch pipe 21 passes through the pump 17 and the electromagnetic valve 18.
It is returned to the tank 16 through the transfer pipe 15. When the translucent liquid 1 flows out of the bag 3, the internal pressure of the bag 3 decreases, the transparent plates 1 and 2 move in the closing direction by the leaf spring 7, and the degree of opening becomes smaller. Therefore, bag body 3
The layer thickness of the translucent liquid 1 inside becomes thinner, and the degree of light shielding decreases. Note that even if the switch 24 is turned off, contacts A and C of the switch 25 remain connected.

Further, if the switch 23 is kept pressed, the transparent plates 1 and 2 will be fully open, and the terminal C of the switch 34 will be opened.
and M are connected. Then, the coil 27 of the switch 25 is magnetized, contacts A and C are connected, the coils 18a and 19b of the electromagnetic valves 18 and 19 are magnetized, the valve bodies 18b and 19b are operated, and the translucent liquid l is returned to the tank 16. The flow path is switched so that the

Therefore, there is no risk that the cover 13 will be damaged due to an excessively large gap between the transparent plates 1 and 2. In addition, if the switch 24 is kept pressed, the transparent plates 1 and 2 will be fully closed, but in this case, the switch 2
Terminals C and L of 3 are connected, and contacts A and B of switch 25 are connected due to the action of the coil 26.
The coils 18a and 19a of the electromagnetic valves 18 and 19 are demagnetized, and the valve body 1 is moved in the direction in which the liquid 1 flows into the bag body 3.
8b and 19b return. Therefore, no abnormal pressure is applied to the pump 17.

In this way, a semi-transparent liquid for sun visor light shielding is used.
The structure allows the layer thickness to be freely changed, and the degree of shading can be adjusted by increasing or decreasing the layer thickness.
By changing the degree of light shielding depending on the brightness outside the vehicle, it is possible to appropriately shield light while maintaining upward visibility. Therefore, it can contribute to safe driving of the vehicle.

In addition, a leaf spring 7 is provided at the upper end of the transparent plates 1 and 2, and a hinge 4 is provided at the lower end so that they can be opened and closed by a fluid transfer means, so that a drive mechanism for changing the fluid layer thickness in the sun visor body is provided. There is no need to provide a fluid layer, the structure can be simplified, and the upper part always has a higher degree of light shielding than the lower part, so that even if the fluid layer thickness is increased, the forward view will not be excessively obstructed.
That is, it is extremely practical as a sun visor.

In the above embodiment, a semitransparent liquid 1 was used as the semitransparent body, but a translucent gas may also be used. Furthermore, as shown in FIG. 8, a transparent plate 36 may be provided behind the windshield 35 to form a storage section for storing the translucent liquid 1, so as to have the function of a sun visor.

[Effects of the invention] In summary, the present invention provides the following excellent effects.

(1) A hinge is provided at the lower end of two transparent plates each having a storage portion between the plates, and an elastic member is provided at the upper end, and translucent fluid is introduced into and discharged from the storage portion to adjust the amount of storage. At the same time, since a fluid transfer means for opening and closing the transparent plate is provided, the degree of light shielding can be changed depending on the brightness outside the vehicle.
Appropriate light shielding can contribute to safe driving.

(2) Since the layer thickness of the translucent fluid and the opening and closing of the transparent plate are controlled by the fluid transfer means and the elastic member, the driving mechanism is simple and extremely practical.

(3) Since the lower part of the transparent plate always allows more light to pass through than the upper part, the forward view is not excessively obstructed.

[Brief explanation of the drawing]

Fig. 1 is an exploded perspective view of a transparent plate showing an embodiment of the sun visor according to the present invention, Fig. 2 is a partially enlarged front view of the transparent plate shown in Fig. 1 when assembled, and Fig. 3 is the same as Fig. 2. Figure 4 is a sectional view taken along the line arrow 1 in the middle.
5 is a sectional view taken along the line - in FIG. 4, FIG. 6 is a system diagram showing the fluid transfer means of the present invention, and FIG. 7 is a switch thereof. FIG. 8 is a side sectional view showing another embodiment of the present invention. In the figure, 1 and 2 are transparent plates, 3 is a bag body as a storage part,
4 is a hinge, 7 is a leaf spring as an elastic member, 15 is a transfer pipe, 16 is a tank, 18 is an electromagnetic valve, and l is a semitransparent fluid.

Claims (1)

[Scope of utility model registration request] Two transparent plates are formed between the plates, each having an accommodating portion for accommodating a translucent fluid, a hinge is provided at the lower end of the transparent plate, and a hinge is provided at the upper end of the transparent plate, and the upper end is biased in a direction to reduce the distance between the plates. A sun visor characterized in that each elastic member is provided, and a fluid transfer means is provided in the storage portion to allow the fluid to enter and exit the storage portion to adjust the amount of the fluid contained therein, and to open and close the transparent plate.