JPH0585155U - Image scanner - Google Patents

Abstract

(57) [Summary] [Purpose] To provide an image scanner that quickly discharges static electricity generated in a document or a portion adjacent to the document. [Structure] Metal plates 35a and 35b are hinge shafts 30a.
Also, the hinge holder 30b is provided to connect the frame 1 and the document table cover 8 in an openable / closable and removable state.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an image scanner.

[0002]

[Prior Art]

 In the past, in this type of device, materials and mechanisms that prevent static electricity were used for the document table cover and the document table glass for fixing documents, but the document table cover was opened and closed and removed. Since it is installed in the main body as much as possible, no mechanism for preventing static electricity or discharging was provided.

[0003]

[Problems to be solved by the device]

 However, in the conventional image scanner, when static electricity is accumulated, the original is stuck, the person is uncomfortable with the human body, or the board malfunctions when the original cover is opened or detached. Even if the document base cover is made of a material that prevents static electricity, static electricity may be generated on the document or the area adjacent to the document when it is touched by a human body charged with static electricity.

The present invention has been made in order to solve the above-mentioned problems, and an object thereof is to provide an image scanner that quickly discharges static electricity generated in a document or a portion adjacent to the document.

[0005]

[Means for Solving the Problems]

 In order to achieve this object, the image scanner of the present invention includes a frame for supporting a head unit for reading a document and a driving unit for driving the head unit, and a document holding unit for fixing the document can be opened / closed and detached. At least a part of the document opening / closing means supported by the mechanism is provided with a conductor electrically connected to the frame.

[0006]

According to the image scanner of the present invention having the above structure, the conductor is provided on at least a part of the document opening / closing means, and connects the frame and the document pressing means in an openable / closable and removable state.

[0007]

【Example】

 An embodiment embodying the present invention will be described below with reference to FIGS.

An image output device (not shown) for outputting an image read by an image scanner includes a holder 23 having a U-shaped cross section on which the image scanner is placed. As shown in FIG. 2, an elastic anti-vibration member 25 is adhered to a portion where the image scanner is placed.

On the other hand, a convex portion 1a that fits into the groove 23a of the holder 23 is provided in the lower portion of the frame 1 of the image scanner, and a support rod 28 that is freely rotatable around an end point 29 is fitted into the convex portion 1a. There is. The holder 23 is provided with a positioning member 24, the convex portion 1a of the frame 1 is fitted in the groove 23a of the holder 23, and at the same time, the supporting rod 28 is housed in the groove 23a of the holder 23. 1 is positioned and fixed on the vibration-proof member 25 by the positioning member 24. Therefore, the vibration isolating member 25 is interposed between the frame 1 and the holder 23, and the holder 23 and the frame 1 come into contact with each other via the vibration isolating member 25. The left and right holders 23 are fixed to the base 23b.

As shown in FIG. 3, a platen glass 7 is placed and fixed on the upper portion of the rectangular frame 1, and a platen cover 8 covers the platen glass 7 at one end of the frame 1. The frame 1 and the document table cover 8 are detachably supported by a hinge portion 30 so as to be movable between a position and an open position.

Inside the frame 1, as shown in FIG. 4, a camera section 6 and a guide bar 5 arranged in parallel with a predetermined interval sandwiching the camera section 6 are fixed in the support holes 27. A full-speed mirror section 10 and a half-speed mirror section 11 are manually supported by the guide bar 5.

As shown in FIG. 6, the full-speed mirror unit 10 includes a halogen lamp 14, a reflector 15, and a first mirror 16, which are movable together. The reflector 15 collects the light of the halogen lamp 14 on the document surface 22 and illuminates the document surface 22. The first mirror 16 reflects the light reflected on the document surface 22 in a direction toward the second mirror 17 of the half speed mirror unit 11 described later.

The half-speed mirror unit 11 is composed of a second mirror 17 and a third mirror 18 which are arranged perpendicular to each other. The light that has entered the second mirror 17 is reflected by the second mirror 17 and the third mirror 18, and enters the camera unit 6.

The camera unit 6 includes a parallel plate glass 19, a lens 20 and a CCD 21, and the parallel plate glass 19 is attached so as to be movable relative to the lens 20. An image of the original 22 is formed on the CCD 21 by the lens 20. Then, no matter where the full-speed mirror unit 10 is located, the distance between the document surface 22 and the lens 20 corresponding to that position is kept constant, and the image of the document surface 22 is formed on the CCD 21. To be done.

The camera unit 6 constitutes the reading mechanism of the present invention, and the full speed mirror unit 10 and the half speed mirror unit 11 constitute the head unit of the present invention.

A drive shaft 3 is supported in the vicinity of the camera unit 6 in the frame 1 via a bearing (not shown). A drive pulley 9 is fixed to both ends of the drive shaft 3, and the drive pulley 9 is connected to the motor 2 fixed in the frame 1 via a drive belt 26. The motor 2 rotates the drive pulley 9 via the drive belt 26.

A first idle pulley 12 is rotatably attached to both ends of the half speed mirror unit 11. A pair of second idle pulleys 4 are rotatably supported by the frame 1 near the end of the guide bar 5 away from the camera section 6. Then, as shown in FIG. 5, one end of the wire 13 is fixed to the frame 1 near the second idle pulley 4 between the first idle pulley 12 and the second idle pulley 4, and the first idle pulley 12, The second idle pulley 4, the drive pulley 9, and the first idle pulley 12 are wound in this order and stretched between the pulleys. The other end of the wire 13 is fixed to the frame 1 in the vicinity of the drive pulley 9 between the drive pulley 9 and the first idle pulley 12. Further, both ends of the full speed mirror unit 10 are fixed to a wire 13 stretched between the drive pulley 9 and the first idle pulley 12.

Since the wire 13 is stretched between the pulleys as described above, when the drive pulley 9 rotates, the wire 13 moves, and when the full-speed mirror unit 10 moves at the same speed as the wire 13, The half speed mirror unit 11 moves at half the speed of the full speed mirror unit 10. The motor 2, the driving pulley 9, the first idle pulley 12, the second idle pulley 4, the wire 13, and the driving belt 26 constitute the driving means of the present invention.

The operation of the image scanner configured as above will be described.

When a document is placed on the document table glass 7 with the document surface 22 on which an image is recorded facing down, and a start key (not shown) is pressed with the document table cover 8 closed, a halogen lamp is displayed. When 14 is turned on, the motor 2 starts to rotate, the full-speed mirror unit 10 moves along the document surface 22, and the half-speed mirror unit 11 moves along the document surface 22 at 1 / th of the full-speed mirror unit 10. Move at a speed of 2. During this movement, as shown in FIG. 6, the light of the halogen lamp 14 reflected by the original surface 22 is reflected by the first mirror 16 and directed toward the half speed mirror section 11, and the light of the half speed mirror section 11 is reflected. The light is reflected by the second mirror 17 and the third mirror 18 and enters the camera unit 6. As a result, the image recorded on the document surface 22 is formed on the CCD 21.

In the above structure, FIG. 1 shows the details of the document opening / closing means section during normal operation.

The manuscript table cover 8 is rotatable about a fulcrum 38, and the manuscript 31 placed on the manuscript table glass 7 is set on the manuscript table cover 8 via a PET resin 32 and a sponge 33. It is pressed and fixed from above by an iron plate 34 that is open. The iron plate 34 is connected to the thin metal plate 35a by a conductive shield wire 36, and is in contact with the other thin metal plate 35b. The thin metal plate 35a is caulked to the resinous hinge shaft 30a, and the thin metal plate 35b is fixed to the iron frame 1 with screws 37 etc. while being installed in the hinge holder 30b. The hinge shaft 30a and the hinge holder 30b are removable. The static electricity generated in the document or in the area adjacent to the document flows to the frame 1 through the PET resin 32, the sponge 33, the iron plate 34, the shield wire 36, and the metal plates 35a and 35b, and is discharged. Therefore, in the image scanner of this embodiment, static electricity is not accumulated on the document table cover 8, there is no discomfort felt by the human body, and malfunction of the substrate can be prevented.

The present invention is not limited to the embodiments described in detail above, and various modifications can be made without departing from the spirit of the invention. For example, a conductor provided in the document opening / closing means may be connected by a conductive movable object instead of a shielded wire or a metal plate. The structure may be fixed and the platen may be moved, the drive means may be a gear instead of the drive belt, or a belt or a rack and pinion may be used instead of the wire, and the image scanner may be a color scanner or a monochrome scanner. But it's okay.

[0024]

As is clear from the above description, in the image scanner of the present invention, even if static electricity is generated in the document or the area adjacent to the document, it is not discharged and accumulated in the frame promptly. When opening or closing the base cover, the manuscript does not stick to the manuscript glass or the manuscript cover, the human body does not feel uncomfortable, and the malfunction of the board can be prevented.

[Brief description of drawings]

FIG. 1 is a sectional view showing a document opening / closing unit of an image scanner to which this embodiment is applied.

FIG. 2 is a perspective view of the image scanner during normal operation.

FIG. 3 is a perspective view showing a frame of the image scanner.

FIG. 4 is a perspective view showing each member in the frame.

FIG. 5 is a side view showing driving means of the image scanner.

FIG. 6 is an explanatory diagram showing the operation of the image scanner.

[Explanation of symbols] 1 frame 2 motor 3 drive shaft 4 idle pulley A 6 camera unit (reading mechanism) 7 original platen glass 8 original plate cover 9 drive pulley 10 full speed mirror unit 11 half speed mirror unit 12 idle pulley B 13 wire 26 Drive Belt 30a Hinge Shaft 30b Hinge Holder 31 Original 32 PET Resin 33 Sponge 34 Iron Plate 35a, 35b Metal Plate 36 Shielded Wire

Claims (1)

[Scope of utility model registration request] 1. A head unit having at least a part of a reading mechanism for reading a document, a driving unit for driving the head unit, a frame for supporting the head unit and the driving unit, and a unit for fixing the document. Document holding means,
An image scanner having an original opening / closing means installed on the frame and supporting the original pressing means with an opening / closing and detachable mechanism, wherein at least a part of the original opening / closing means is provided with a conductor electrically connected to the frame. Image scanner.