JPH0671971A - Image forming device - Google Patents

Abstract

PURPOSE:To provide an image recording device which can release a head from a platen easily by a simple constitution, make the whole of the image recording device compact and reduce the cost. CONSTITUTION:When an on-off cover 3 is opened, a recording head 2 or a recording platen 4 and a read head 7, or else a head holding section 7 holding the read platen 6 integrally is rotated following the opening, and the recording head 2 is separated from the recording platen 4 and the read head 5 is separated from the read platen 6, and the maintenance work such as paper jamming can be performed easily.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mechanism for releasing a space between a recording head and a recording pressure bonding means and between a reading head and a reading pressure bonding means in an image forming apparatus such as a facsimile machine or a copying machine.

[0002]

2. Description of the Related Art Conventionally, in this type of image forming apparatus,
When a recording medium or a document is jammed in the apparatus and a paper jam occurs, as a maintenance, if the recording medium is a jam, the recording head and the recording pressure bonding means for pressing the recording medium onto the head are separated (released). If the original is jammed, the paper is removed by releasing the space between the reading head and the reading press-bonding means for pressing the original onto the head.

A mechanism for releasing as described above will be described with reference to the drawings. In the image forming apparatus 50 shown in FIG. 5, the recording head 51 and the recording platen 5 are normally operated.
The reading head 53 and the reading platen 54 are pressed against each other by a pressing spring 59. The recording paper 55 is sandwiched and conveyed between the recording head 51 and the recording platen 52, and the recording paper 55 is conveyed.
The image is recorded on. The original 60 is conveyed between the reading head 53 and the reading platen 54, and the image of the original 60 is input. Further, the recording head 51 and the pressure-bonding spring 56 are integrally provided on a recording paper cover 58 which opens and closes with a shaft 57 as a rotating shaft, and the reading platen 54 is integrally provided with a document cover 62 which opens and closes with a shaft 61 as a rotating shaft. Has been.

In such an image forming apparatus 50, when the recording paper 55 or the original 60 is jammed inside the apparatus at the time of conveyance, the recording paper cover 58 or the original cover 62 is opened in the state of the chain double-dashed line shown in FIG. The space between 51 and 53 and the platens 52 and 54 is released, and the paper is set again.

The image forming apparatus 65 shown in FIG.
The recording paper cover 58 and the document cover 62 of the image forming apparatus 50 shown in (1) are integrally formed, and the integrated cover 66 opens and closes with the shaft 61 as a rotation shaft. Other configurations are similar to those of the image forming apparatus 50 of FIG. When a paper jam occurs in the image forming apparatus 65, the cover 66 is opened to the state shown by the two-dot chain line in the same manner as described above, and the space between the heads 51 and 53 and the platens 52 and 54 is released to re-use each paper. set.

Further, as another release mechanism, FIG.
As shown in (a) and (b), when the recording paper 73 conveyed between the recording head 71 and the recording platen 72 is jammed, a head release lever 77 that rotates about a shaft 76 as a rotating shaft is used. By rotating from the state shown in FIG. 7A to the state shown in FIG. 7B, the lever 77 moves the holding plate 74 holding the recording head 71 against the compression spring 75, and the recording head 71 is moved to the recording platen. There is a device for retreating from 72. The read head side also has a similar retracting means. Further, there is also one in which one head is released by opening and closing the cover as described above, and the other head uses a head release lever.

[0007]

However, in the conventional image forming apparatus as described above, the opening / closing cover is provided for recording and reading in order to separate the recording / reading head from each platen. Since there are various types and other special parts for releasing the space between the head and the platen, a large space is required, which is not suitable for downsizing and cost reduction of the image recording apparatus. Even in the case of one type of opening / closing cover as shown in FIG. 6, since the recording head and the reading head are arranged at different positions, a large space is required for disposing each head and the platen. It was The present invention is
An image recording apparatus that solves the above-described problems and that can easily release between the head and the platen with a simple configuration and that can reduce the size and cost of the entire image recording apparatus. The purpose is to

[0008]

To achieve the above object, the present invention provides a recording head for recording an image on a recording medium,
A rotatable opening / closing cover for covering the recording medium from above, a recording pressure bonding means for pressure-bonding the recording medium to the recording head,
A reading head for reading a document, a reading crimping means for crimping the document to the reading head, the recording head or the recording crimping means, and the reading head or the reading crimping means are integrally held, and the opening / closing cover is opened and closed. The recording head and the recording pressure bonding means and the reading head and the reading pressure bonding means are separated from each other by opening the opening / closing cover.

[0009]

According to the above construction, when the opening / closing cover is opened, the recording head or the recording pressure-bonding means and the reading head or the holding portion integrally holding the reading pressure-bonding means are rotated together with the opening of the cover to rotate the recording head. Since the recording press-bonding means and the reading head and the read press-bonding means are separated from each other, maintenance work such as paper jam can be easily performed.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows a sectional structure of the image forming apparatus. The image forming apparatus 1 includes a recording head 2, a recording platen 4 serving as a recording pressure-bonding unit held by an opening / closing cover 3 so as to face the recording head 2, a reading head 5, and the reading head 5. And a platen for reading 6, which is a crimping means for reading arranged. The recording head 2 and the reading head 5 are rotatably supported by a head holding portion 7
Are held together by. A recording sheet 8 placed on a recording sheet holder 9 between the recording head 2 and the recording platen 4.
Is conveyed in the direction of the arrow in the figure, and the document 10 is conveyed in the direction of the arrow in the figure between the reading head 5 and the reading platen 6.

The opening / closing cover 3 is attached to the main body so as to cover the recording paper 8 from above and to be rotatable about a shaft 11. The head holding portion 7 is urged by a urging spring 12 so that the portion holding the recording head 2 is pressed against the recording platen 4 from behind. Also,
The head holding portion 7 has a shaft 13 at the end on the side where the reading head 5 is held, and is arranged so as to be rotatable around this shaft 13.

FIG. 2 shows a recording / reading head integrally held by the head holding portion 7. The recording head 2 (thermal head) is adhered to the head frame 7a, and the reading head 5 (image sensor) is screwed to the opposite side and the back surface with respect to the adhering surface of the recording head 2. The head 5 is integrated. Cylindrical shafts 13 are provided at both ends of the head frame 7a, and the head holding portion 7 is attached to the main body of the device 1 so as to be rotatable about the shafts 13.

Next, the operation of the above configuration will be described with reference to FIG. FIG. 3 shows the image forming apparatus 1 with the open / close cover 3 opened. When the opening / closing cover 3 is opened, the recording platen 4 is separated from the recording head 2. That is, since the recording platen 4 is held by the opening / closing cover 3, the recording platen 4 is released from the recording head 2 by opening the opening / closing cover 3. The opening / closing cover 3 is opened and the biasing spring 1 biases the recording head 2 toward the recording platen.
2, the head holding portion 7 rotates about the shaft 13 in the counterclockwise direction in the drawing. As a result, the reading head 5 is released from the reading platen 6. The head holding portion 7 comes into contact with a stopper 14 formed on the main body of the apparatus 1 and stops. In this state, the recording paper 8 or the original 10 is set again.

As described above, in the image forming apparatus 1, the recording head 2 and the reading head 5 are integrally held by the head holding portion 7, and the holding portion 7 opens the open / close cover 3 so that the biasing spring 12 is used. Since it is designed to rotate,
It is not necessary to provide two types of open / close covers for separating the head and the platen on the recording side and the reading side, and the head and the platen can be released without providing a special mechanism or member such as a release lever. Further, since it is possible to reduce extra members, it is possible to reduce the cost, and the recording head 2 and the reading head 5 are integrated so that the size can be reduced.

The present invention is not limited to the above embodiment, but various modifications can be made. For example, in the above-described embodiment, the biasing spring 12 is used to rotate the head holding unit 7, but the biasing spring 12 is not used and the end of the head holding unit 7 on the side opposite to the recording head 2 is used. If a weight is provided in the portion, the head holding portion 7 rotates about the shaft 13 by opening the opening / closing cover 3, and the same operation as in the above embodiment can be obtained.

Further, it is possible to adopt a modification as shown in FIGS. 4 (a) and 4 (b). That is, in FIG. 4A, the shaft 13 is located in the middle of the mounting position of the recording head 2 and the reading head 5 of the head holding portion 7, and the opening / closing cover 3
In the closed state, the tip of the cover 3 presses the holding portion 7 so that the heads 2 and 5 and the platens 4 and 6 are pressed. Recording Platen 4
May be held by the opening / closing cover 3 or may be held by the main body of the device 1. In this structure, when the opening / closing cover 3 is opened, the head holding portion 7 rotates in the direction of the arrow shown. Therefore, the recording head 2 is moved from the recording platen 4 to
The read head 5 is released from the read platen 6.

In FIG. 4 (b), the head holding section 7 holds a reading platen 6 instead of the reading head 5 shown in FIG. 4 (a), and the reading head 5 is held in the main body of the apparatus 1. It is arranged. Others may be the same as the configuration of FIG. 4A, and the recording platen 4 may be held by the opening / closing cover 3 or may be held by the main body of the apparatus 1. Also in this configuration, the same operation and effect as described above can be obtained.

It is needless to say that the same can be applied to the case where the recording head 2 and the reading head 5 are provided at positions opposite to the head frame 7a in the above-described embodiments and modifications. Further, as the member held by the head holding portion 7, either the recording head 2 or the recording platen 4 and the reading head 5 or the reading platen 6 can be appropriately combined.

[0019]

As described above, according to the present invention, the recording head or the recording pressure-bonding means and the reading head or the reading pressure-bonding means are integrally held by the holding portion, and the holding portion is rotated as the opening / closing cover is opened. Since the recording head and the recording pressure bonding means are separated from each other and the reading head and the reading pressure bonding means are separated from each other, it is possible to reduce members such as a special release mechanism and an opening / closing cover, and reduce cost. Miniaturization of the device can be achieved.

[Brief description of drawings]

FIG. 1 is a schematic sectional view showing an image forming apparatus according to an embodiment of the present invention.

FIG. 2 is a perspective view of a head section held by a holding section used in the apparatus.

FIG. 3 is a schematic cross-sectional view showing a state in which the opening / closing cover of the device is opened.

FIG. 4 is a configuration diagram of a main part according to a modified example of the present invention.

FIG. 5 is a schematic sectional view showing a conventional image forming apparatus.

FIG. 6 is a schematic cross-sectional view showing another conventional image forming apparatus.

FIG. 7 is a configuration diagram showing a release mechanism of a conventional image forming apparatus, in which (a) shows a normal state and (b) shows a released state.

[Explanation of symbols]

 2 recording head 3 open / close cover 4 recording platen 5 reading head 6 reading platen 7 head holder 13 axis

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Internal reference number FI Technical indication location H04N 1/00 108 Q 7046-5C

Claims (1)

[Claims] 1. A recording head for recording an image on a recording medium, a rotatable opening / closing cover for covering the recording medium from above,
Recording crimping means for crimping a recording medium to the recording head, a reading head for reading an original, reading crimping means for crimping the original to the reading head, the recording head or the recording crimping means, and the reading head or the reading head A holding unit that holds the pressure bonding unit integrally and that rotates with the opening and closing of the opening and closing cover, and by opening the opening and closing cover, between the recording head and the recording pressure bonding unit, and between the reading head and the reading unit. An image forming apparatus characterized in that it is separated from a pressure bonding means.