JPH10319505A - Power source cord winding device for projector device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make a power source cord winding device of a projector device light in weight and compact by reducing the number of parts and simplifying the structure of the device and to surely protect a lens. SOLUTION: In a projector device, a power source cord winding device is freely rotatably provided with a power source cord winding barrel 2 by using a freely rotatable cylindrical lens 1 provided for projection and display. Then, a spring material 8 is used for the rotating force of the barrel 2 and a motor 4 for driving the motor-driven zooming and the motor-driven focusing of the cylindrical lens 1 provided for the purpose of the projection and the display is used for a means winding the spring material 8. Besides, the tip part of the power source cord is provided with a cap for protecting a lens.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a projector device, and more particularly to a power cord winding device for a liquid crystal projector device.

[0002]

2. Description of the Related Art Conventionally, as a power cord winding technique,
There is a disclosure in JP-A-60-188277. This technology is a power cord winding device incorporated in an electric device main body, in which a part of a cylindrical portion of a cord reel is configured to be detachable, and in this portion, a front end of the power cord can be connected to a power supply side. Technology that facilitates the exchange of

[0003]

The conventional power cord winding is performed by a dedicated power cord winding device provided separately from the main body of the electric equipment. In this case, a cord reel and other parts are required in addition to the power supply device body as the device. In addition, if the power cord winding device is incorporated in the electric device main body, the electric device main body becomes large.

[0004] As described above, general electric appliances are generally used. Particularly, liquid crystal projectors are required to be reduced in size and weight because they are used in many cases. When moving, the power cord needs to be stored in a predetermined storage place. Also, in a liquid crystal projector, it is important to protect the lens. However, conventionally, a separate protective cap is used to easily lose or damage the lens, and the lens is sufficiently protected separately from the intended purpose. Absent.

The present invention makes it possible to wind up a power cord with a small number of parts and without taking up a lot of space, and to further reduce the weight by using a lens mechanism of a projector device, thereby protecting the power cord. A power cord take-up device for a projector device is obtained which is sufficient until the cap is attached.

[0006]

The present invention that achieves the above object has the following matters specifying the invention. (1) In a power cord winding device provided in a projector device, a power cord winding cylinder for winding a power cord rotatably around the cylindrical lens is provided around an outer periphery of the cylindrical lens.

(2) In the power cord winding device provided in the projector device of (1), a spring and a rotation transmission mechanism are provided for generating a rotational force of the power cord winding cylinder, and the spring is electrically driven by a lens mechanism. The present invention is characterized in that a motor is connected to apply a spring force.

(3) In the power cord winding device provided in the projector device of the above (1), a cap for protecting the lens is attached to the tip of the power cord, and when the winding is completed, the cap comes to a position for protecting the lens. It is characterized by doing so.

According to the present invention, in a projector device, a cylindrical lens provided for projection display is used for a winding mechanism of a power cord, the number of parts is reduced, and the structure is simplified. By reducing the number of parts and simplifying the structure, the size and weight of the apparatus main body are reduced. In addition, since the spring material for winding the power cord is automatically wound, the force applied when the power cord is pulled out is reduced, and the cap is securely attached when the power cord is wound.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Here, an embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a configuration diagram of an example of the present invention, FIG. 2 is a diagram illustrating a mechanism of a gear unit used in an example of the present invention, and FIG. 3 is a diagram illustrating a state of a lens unit at the end of winding in an example of the present invention. It is.

In FIG. 1, a cord reel 2 on which a power cord 3 is wound is provided around the lens 1 and rotates freely around the lens 1. One end of the cord reel 2 is a gear 14, which meshes with the gear 13. When the power of the LCD projector is turned on, the motor 4
The solenoid plunger 5 connected to the motor works against the spring 15 to pull the motor 4 toward the gear 6 and move the motor 4 so that the rotating shaft of the motor 4 meshes with the gear 6. That is, when the motor 4 moves toward the gear 6 by the driving of the solenoid plunger 5, a tensile force is applied to the spring 15 whose one end is connected to the motor 4 and the other end is fixed, and opposes the tensile force of the spring 15. The plunger 5 draws the motor 4. When the rotating shaft of the motor 4 is engaged with the gear 6, the motor 4 is driven for a certain period of time by microcomputer control to rotate the gear 6.

The gears 6 and 12 are provided at both ends of the spring member 8 and have stoppers 7 and 10, respectively. The stoppers 7 and 10 cause the gears 6 and 12 to rotate only in one direction, and in the opposite direction. It does not rotate. When the gear 6 rotates by driving the motor 4 in contact with the gear 6 according to this structure, the gear 12 is fixed by the stopper 10 shown in FIG. 2 and does not rotate.
Even if the gear 6 in FIG. 1 rotates in the direction of the arrow, the gear 12 does not rotate as indicated by the dotted arrow, so that a torsional force acts on the spring material 8 such as a coil spring or a leaf spring between the gear 6 and the gear 12, and the spring material 8 Torsion force is accumulated. The torsion force acts and the spring material 8 is wound around the gears 6 and 12 with the stoppers 7 and 1.
At 0, it is fixed so that it does not rotate in the opposite direction to each other.

When the motor 4 is driven for a certain period of time to rotate the gear 6 and wind the spring member 8, the power supply of the solenoid plunger 5 is turned off by microcomputer control. When the power of the solenoid plunger 5 is turned off, a force for restoring the original state is applied to the spring 15 which has been pulled. Due to the restoring force of the spring 15, the motor 4 moves from the gear 6 side to the lens 1 side and separates from the gear 6. When the motor 4 contacts the lens 1 side, the motor 4 can drive the lens 1 and performs an electric zoom or focus function.

The stopper 10 on the side of the gear 12 has a stopper release button 9. When the stopper release button 9 is pressed, the stopper 10 is released. The stopper 10 and the gear 12 are connected by a shaft 11, and when the stopper release button 9 is pressed, the stopper 10 is released and the gear 12 meshes with the gear 13. Stopper 1
When 0 is released, the force of the spring material 8 wound by the torsional force is transmitted to the gear 12, and the gear 12 starts rotating. Gear 1
2 rotates, the gear 13 meshing with the gear 12
, A rotational force is applied to the gear 14 at one end of the code reel 2, the code reel 2 rotates around the lens 1 as a rotation axis, and the rotated code reel 2 winds up the power cord 3.

When the cord reel 2 finishes winding the power cord 3 as shown in FIG. 3, the lens protection cap 16 provided at the end of the power cord 3 moves to a position where the lens 1 is protected. The lens 1 can be sufficiently protected by fitting the moved lens protection cap 16 into the lens hood 17.

[0016]

Since the existing lens mechanism is used,
The power cord winding mechanism is simple, lightweight and compact, making it easy to move and carry. The lens protection cap provided at the end of the power supply cord of the apparatus is moved to a position for protecting the lens at the end of the winding, thereby enabling sufficient protection of the lens. Further, by using the motor of the lens mechanism as the means for winding the spring material for winding the power cord, the force applied when the power cord is pulled out is reduced.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of an example of the present invention.

FIG. 2 is a diagram showing a mechanism of a gear portion used in an example of the present invention.

FIG. 3 is a diagram showing a state at the end of power cord winding in one example of the present invention.

[Explanation of symbols]

 Reference Signs List 1 lens 2 cord reel 3 power cord 4 motor 5 solenoid plunger 6 gear 7 stopper 8 spring material 9 stopper release button 10 stopper 11 shaft 12 gear 13 gear 14 gear 15 spring 16 lens protection cap 17 lens hood

Claims (3)

[Claims] 1. A power cord winding device provided in a projector device, wherein a power cord winding cylinder for winding a power cord rotatably around the cylindrical lens is provided around an outer periphery of the cylindrical lens. Power cord winding device. 2. The power cord winding device provided in the projector device according to claim 1, further comprising: a spring and a rotation transmitting mechanism for generating a rotational force of the power cord winding cylinder.
A power cord winding device, wherein an electric motor of a lens mechanism is connected to the spring to apply a spring force. 3. A power cord winding device provided in the projector device according to claim 1, wherein a cap for protecting a lens is attached to a tip portion of the power cord, and the cap is positioned to protect the lens when winding is completed. A power cord winding device characterized in that: