JP2007150848A - Scanner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a scanner for pressing down, from the area just above a document even if the document is thick. <P>SOLUTION: The scanner 1 comprises a scanner housing 10 including a document board 11 for setting thereon the document, a document cover 20 for pressing down the document, and at least a couple of link members 30a, 40a for coupling the document board and the document cover. The couple of link members 30a, 40a, scanner housing 10, and document cover 20 form a parallel link mechanism. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a scanner device.

  FIG. 6 shows a conventional scanner device. The scanner device includes a scanner housing 10 in which a carriage on which an image sensor is mounted is housed, and a document cover 20 for pressing the document 100 placed on the document table 11 on the upper surface of the scanner housing 10. . One end of the document cover 20 is connected to the scanner housing 10 by a hinge 55 (see Patent Document 1).

JP 2000-235235 A

  In the conventional scanner device, when the document is thick, the document cover 20 presses the document 100 from an oblique direction as shown in FIG. If it does so, it will become easy to produce a nonuniformity in the taken-in image. Further, since the sheet is pressed from an oblique direction, the position of the document is shifted and external light easily enters.

  An object of the present invention is to enable a document to be pressed from directly above even when it is thick.

  In order to achieve the above object, in the first scanner device of the present invention, a document cover for pressing a document is displaced in parallel by a parallel link mechanism with respect to a document table on which the document is placed.

A second aspect of the present invention is a scanner device,
A scanner housing having a document table for placing a document;
A document cover to hold the document,
And at least two link members for connecting the scanner housing and the document cover. The two link members, the scanner housing, and the document cover form a parallel link mechanism.

  One link member of the two links may be detachable from the document cover.

  Connection portions of the two link members with the scanner housing and the document cover may be hidden by the scanner housing and the document cover.

  Furthermore, a link member that connects the two links may be provided, and the scanner housing, the two link members, and the link member that connects the two links may form a parallel link mechanism.

  An embodiment of the present invention will be described with reference to the drawings.

  FIG. 1 is an external view of a scanner device 1 to which this embodiment is applied. The front of the drawing is the front of the scanner device 1.

  The scanner device 1 includes a scanner housing 10 that houses a carriage 12 on which an image sensor is mounted, and a document cover 20 that holds a document.

  The carriage 12 is slidably fixed to a guide rod (not shown) fixed to the scanner housing 10, and reciprocates in the axial direction of the guide rod as the motor (not shown) rotates.

  An opening is provided in the upper part of the scanner housing 10, and a document table 11 for placing a document is installed in the opening.

  The document table 11 is a transparent glass plate or the like that closes an opening formed in the upper portion of the scanner housing 10, and is fixed to the scanner housing 10.

  The document cover 20 is for holding down the document placed on the document table 11 and reducing the intrusion of external light. A mat 21 for pressing the document is provided on the surface of the document cover 20 that contacts the document.

  The document cover 20 is attached to the scanner housing 10 by four link members 30a, 40a, 30b, and 40b having the same length provided on the left and right side surfaces. The document cover 20 is formed by these link members 30 a, 40 a, 30 b, and 40 b to form a four-link parallel link mechanism on the left and right side surfaces, and is displaced parallel to the document table 11. Hereinafter, one side surface (right side surface) will be described in detail as an example.

  A front rotary shaft 31a and a rear rotary shaft 41a are attached to the upper part of the right side surface of the scanner housing 10 in the front-rear direction.

  A front rotary shaft 32a and a rear rotary shaft 42a are attached to the lower part of the same side surface (right side surface) of the document cover 20, respectively. The distance between the front rotation shaft 32a on the document cover 20 side and the rear rotation shaft 42a is the same as the distance between the front rotation shaft 31a on the scanner housing 10 side and the rear rotation shaft 41a. As shown in FIG. 2A, when the document cover 20 is completely closed, the positions of the rotation shafts 32a and 42a of the document cover 20 are slightly higher than the positions of the rotation shafts 31a and 41a of the scanner housing 10. Forward.

  The front link member 30a has a shaft hole at the end on the scanner housing 10 side, and is fitted into the front rotation shaft 31a on the scanner housing 10 side. Thereby, the front link member 30a is pin-fixed to the scanner housing 10, and the end portion on the side of the document cover 20 is swingable about the front rotation shaft 31a on the scanner housing 10 side.

  A shaft hole 33a that opens in a direction opposite to the direction of the shaft hole at the other end is provided at the end of the front link member 30a on the document cover 20 side. The shaft hole 33a is fitted into the front rotating shaft 32a when the document cover 20 is closed to some extent. As a result, the front link member 30 a is pin-fixed to the document cover 20. At this time, the end of the front link member 30a on the scanner housing 10 side is swingable about the front rotation shaft 32a on the document cover 20 side. When the document cover 20 is opened to some extent, the front rotation shaft 32 of the document cover 20 can be removed from the shaft hole 33a opened in the front link member 30a. That is, the front link member 30 a is detachable from the document cover 20.

  The rear link member 40a has a shaft hole at the end on the scanner housing 10 side, and is fitted into the rear rotation shaft 41a on the scanner housing 10 side. Thereby, the rear link member 40a is pin-fixed to the scanner housing 10, and the end portion on the side of the document cover 20 is swingable about the rear rotation shaft 41a on the scanner housing 10 side.

  The rear link member 40a also has a shaft hole at the end on the document cover 20 side, and is fitted into the rear rotation shaft 42a on the document cover 20 side. Thus, the rear link member 40a is pin-fixed to the document cover 20, and the end portion on the scanner housing 10 side is swingable about the rear rotation shaft 42a on the document cover 20 side.

  In a state where the front rotation shaft 33a of the document cover 20 is fitted in the shaft hole 33a, the document cover 20 (portion between the rotation shafts), the scanner housing 10 (portion between the rotation shafts), the front link member 30a, A four-link parallel link mechanism comprising the rear link member 40a is formed. As a result, the document cover 20 is displaced parallel to the document table 11.

  Similarly, on the opposite side surface (left side surface), the front link member 30b is pin-fixed by the scanner housing 10 and the front rotary shaft 31b on the scanner housing 10 side. The end on the side of the document cover 10 is provided with an open shaft hole 33b, and is detachable from the front rotary shaft 32b on the side of the document cover 20. The rear link member 40b is pin-fixed by the scanner housing 10 and a rear rotating shaft 41b on the scanner housing 10 side. Further, the document cover 20 is pin-fixed by a rear rotation shaft 42 b of the document cover 20.

  Since the parallel link mechanisms are formed on the left and right side surfaces, the document cover 20 can be stably displaced in parallel with respect to the document table 11. The mat 21 of the document cover 20 can press the document from directly above.

  FIG. 2 is an external view of the operation until the document cover 20 is opened. In FIG. 2, the right side surface of the scanner device 1 is shown in front.

  In a state where the document cover 20 is completely closed, the shaft hole 33a on the document cover 20 side of the front link member 30a is fitted into the front rotation shaft 32a of the document cover 20 (step (A)).

  The user applies force to the document cover 20 backward. Then, the document cover 20 is lifted upward (step (B)), and the opening of the shaft hole 33a of the front link member 30a is directed upward (step (C)).

  At this time, when a further upward force is applied to the document cover 20, the front rotation shaft 32a of the document cover 20 is removed from the shaft hole 33a (step (D)). Further, when a force is applied upward, the document cover 20 is further opened (step (E)).

  FIG. 3 is a diagram showing an operation until a document is placed and the document cover 20 is closed.

  As described above, the document cover 20 is sufficiently opened, and the document 100 is placed on the document table 11 (step (F)).

  When the document cover 20 is gradually closed (step (G)) and the document cover 20 becomes approximately parallel to the document table 11, the front of the document cover 20 is inserted into the shaft hole 33a opened on the document cover 20 side of the front link member 30a. The rotating shaft 32a is fitted (step (H)).

  When the document cover 20 is pulled in front of the scanner device 1 (in the direction of the arrow X in FIG. 3), the document cover 20 is displaced downward while maintaining parallel to the document table 11, and the document is pressed from directly above. (Step (I)).

  The operation until the document cover 20 is opened, the document is placed thereon, and the document cover 20 is closed has been described. When the document cover 20 is closed, the scanner device 1 starts a scanning process in accordance with an operation command from the user.

  The embodiment of the present invention has been described above.

  According to the above embodiment, the document cover is displaced in parallel to the document table. Therefore, the original can be pressed from directly above, and unevenness of the captured image can be suppressed. In addition, document misalignment and intrusion of external light can be reduced.

  A part of the link member forming the parallel link mechanism is detachable in a state where the document cover is opened to some extent. That is, the document cover can be opened and closed in two stages. Therefore, the user can place the document with the document cover fully opened.

<Modification>
The present invention is not limited to the above embodiment. The above embodiment can be variously modified within the scope of the technical idea of the present invention.

  For example, when the document cover 20 is closed, the front link after attachment / detachment is performed so that the shaft holes 33a, 33b of the front link members 30a, 30b are securely fitted into the front rotation shafts 32a, 32b on the document cover 20 side. The free movement of the members 30a and 30b may be limited.

  Specifically, as shown in FIG. 4, a link member 50a for connecting the front link member 30a and the rear link member 40a by pin fixing is provided. In other words, the front link member 30a, the rear link member 40a, the scanner housing 10 (the portion between the rotation shafts), and the newly provided link member 50a form a four-link parallel link mechanism. . And the front link member 30a after attachment / detachment is made to interlock | cooperate with the back link member 40a (refer step (A)-(D)). In this way, when the document cover 20 is closed again, the shaft hole 33a of the front link member 30a comes to the position of the front rotation shaft 32a of the document cover 20, so that it can be securely fitted.

  Further, as shown in FIG. 5, the front link member 30a (30b) and the rear link member 40a (40b) may not be visible when the document cover 20 is completely closed. Specifically, the connecting portions on the scanner housing 10 side of the link members 30a, 40a, 30b, and 40b are covered with the scanner housing 10. Further, the connecting portions of the link members 30 a, 40 a, 30 b, 40 b on the side of the document cover 20 are covered with the document cover 20. In other words, each link member 30 a, 40 a, 30 b, 40 b passes through a hole located on the upper surface of the scanner housing 10 and outside the document table 11. Further, each link member 30 a, 40 a, 30 b, 40 b passes through a hole located on the lower surface of the document cover 20 (the surface facing the document table 11) and outside the mat 21.

  In the above description, an example in which the present invention is applied to a scanner device has been described. However, the present invention is not limited to this as long as the device reads an image. For example, the present invention can be applied to a copy machine, a facsimile machine, and a multifunction machine of these.

FIG. The figure explaining operation | movement when opening a document cover. The figure explaining the operation | movement when a document cover is closed. The figure explaining operation | movement when opening a document cover. FIG. The external view of the conventional scanner apparatus.

Explanation of symbols

1 ... Scanner device,
10 ... scanner housing, 11 ... document table, 12 ... carriage,
20 ... Document cover, 21 ... Mat,
30a, 30b, 40a, 40b ... link member,
31a, 31b, 32a, 32b, 41a, 41b, 42a, 42b ... rotating shaft,
33a, 33b ... shaft hole

Claims (5)

A scanner device,
A scanner device, wherein a document cover for pressing a document is displaced in parallel by a parallel link mechanism with respect to a document table on which the document is placed. A scanner device,
A scanner housing having a document table for placing a document;
A document cover to hold the document,
Comprising at least two link members connecting the scanner housing and the document cover;
The two link members, the scanner housing, and the document cover form a parallel link mechanism. In claim 2,
One of the two links is detachably attached to the document cover. In claim 2,
A connecting portion of the two link members between the scanner housing and the document cover is hidden by the scanner housing and the document cover. In claim 2,
And a link member connecting the two links.
The scanner device, wherein the scanner housing, the two link members, and the link member connecting the two links form a parallel link mechanism.

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