JPH0510449Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] This invention relates to a head support device for properly supporting a head substrate such as an image sensor for reading a document in a facsimile machine relative to a platen roller.

[Conventional example]

Generally, in the document reading section of a facsimile machine, the document is read through an optical system such as a lens or mirror.
The image is formed on a CCD, but recently, due to the need for miniaturization, there has been a trend toward using a fully contact type with a built-in light source. The method of attaching this complete contact type image sensor to the facsimile reading section is almost the same as the method of attaching a thermal head in a printer. Support metal fittings 2, 2 are screwed to both ends of the image sensor 1, and the image sensor 1 is attached to a support shaft 3 fixed to the device housing side via the support metal fittings 2, 2, and the image sensor 1 is attached by a spring means 4. 1 is brought into pressure contact with the platen roller 5.

[Problem that the invention attempts to solve]

However, the conventional example described above has a drawback in that, for example, if the device housing is distorted, the reading line of the image sensor 1 with respect to the platen roller 5 will shift. In order to adjust this, it is necessary to loosen the screws and change the mounting position of the image sensor 1 with respect to the support fittings 2, 2, and this type of adjustment work requires considerable effort.

[Means for solving problems]

In order to solve the above-mentioned conventional drawbacks, the present invention provides a head support device that properly supports a head board of an image sensor or the like with respect to a platen roller.
A support member having a positioning guide piece that comes into contact with the rotation shaft of the platen roller is attached, and a first spring means urges the support member so that the guide piece comes into contact with the rotation shaft, and a second The head substrate is pressed against the platen roller by a spring means in a direction perpendicular to the biasing direction of the first spring means, and the head substrate is positioned with respect to the rotation axis of the platen roller. ing.

[Effect]

As described above, with this configuration, the position of the head board is always adjusted with the rotation axis of the platen roller as a reference via the support member, so even if the device housing is distorted, it will not be affected. The reading line will not deviate from the platen roller.

〔Example〕

Hereinafter, an embodiment of this invention will be described in detail with reference to FIGS. 1 and 2.

In these figures, 10 is a head substrate of an image sensor, and 11 is a platen roller. In this case, the head board 10 has support metal fittings 12, 12 attached to both ends thereof, and the support metal fittings 12, 1
2 to, for example, a side wall 13 of the equipment housing, while the platen roller 11 is also supported on the side wall 13 of the equipment housing via its rotation shafts 11a, 11a.

The support fitting 12 includes a mounting base 12a that is screwed to the back surface of the head board 10, and a mounting base 12a that is screwed to the back surface of the head board 10.
A side plate 12b is bent downward from one side of the platen roller 2a at a substantially right angle, and a guide piece 14 is provided on the side wall 12b so as to be able to come into contact with the rotating shaft 11a of the platen roller 11. ing. According to this embodiment, a support shaft 15 is installed in the rear end portion of the side plate 12b (rightward in FIG. 2), and in connection with this, a length is provided on the side wall 13 side to slidably receive the support shaft 15. A hole 13a is bored. That is, the head substrate 10 is arranged in the long axis direction of the elongated hole 13a (direction perpendicular to the axis of the platen roller 11).
A spring 16 is interposed between the support shaft 15 and the device housing to urge the guide piece 14 toward the platen roller 11. The head board 10 also has a leaf spring 17.
The platen roller 11 is pressed into contact with the platen roller 11 at a position.

According to the above configuration, the guide piece 14 is connected to the spring 16
Since the head substrate 10 is urged to come into contact with the rotating shaft 11a of the platen roller 11, the head substrate 10 is positioned via the guide piece 14 so that its reading line always comes into contact with the platen roller 11.

In the above embodiment, the guide piece 14 is brought into contact with the rotating shaft 11a of the platen roller 11, but the guide piece 14 may be brought into contact with a bearing of the rotating shaft 11a.
Furthermore, it goes without saying that the support fitting 12 may be made of plastic. Further, although the facsimile image sensor has been described as an example, the present invention is not limited thereto, and can also be applied to a head substrate such as a thermal head of a printer, for example.

〔effect〕

As explained above, according to this invention, there is provided a support device for a head substrate, which can always set a head substrate such as an image sensor at an appropriate position with respect to a platen roller.

[Brief explanation of drawings]

FIG. 1 is a perspective view of essential parts showing an embodiment of this invention, FIG. 2 is a side view of the same embodiment, and FIG. 3 is a perspective view of a conventional example. In the figure, 10 is a head board, 11 is a platen roller, 11a is a rotating shaft, 12 is a support fitting, 13 is a side wall, 13a is a long hole, 14 is a guide piece, 15 is a support shaft, and 16 is a spring.

Claims (1)

[Scope of Claim for Utility Model Registration] A head support device for properly supporting a head board of an image sensor or the like relative to a platen roller, comprising positioning guide pieces that abut the rotating shaft of the platen roller at both ends of the head board. A first spring means urges the support member so that its guide piece comes into contact with the rotating shaft, and a second spring means pushes the head board against the first A head support for an image sensor, etc., characterized in that the head substrate is pressed against the platen roller in a direction perpendicular to the biasing direction of the spring means, and the head substrate is positioned with reference to the rotation axis of the platen roller. Device.