JPH04331565A - Image recorder - Google Patents

Abstract

PURPOSE:To prevent a recording roller under recording from being separated from a recording head at the image recorder fitting a recording head 2 and a transmission gear 5 of a driving device to the main body of the device and fitting a recording roller 7 to an opening/closing unit. CONSTITUTION:Concerning the recording roller 7 pressed to the recording head 2, the transmission gear engaged to a recording roller gear 8 provided at the recording roller 7 is arranged in counter to the recording head 2 and when transmitting rotating force from the transmission gear 5, force to press the recording roller 7 to the recording head is operated.

Description

[Detailed description of the invention]

0001

[Field of Industrial Application] The present invention relates to an image recording device used for electronic whiteboards, facsimile machines, etc., and in particular to a recording roller that has a recording head and a drive device attached to the main body of the device, and conveys recording paper while pressing it against the recording head. The present invention relates to an image recording device in which the image recording device is attached to an opening/closing unit that can be opened and closed on the device body.

0002

2. Description of the Related Art Conventionally, as shown in FIGS. 3 and 4, a device of this type includes a recording head 2 for printing on recording paper 1, a motor 3, an intermediate gear 4, A drive device having a transmission gear 5 and the like is attached, and a recording roller 7 that conveys the recording 1 while pressing it against the recording head 2 is attached to an opening/closing unit (not shown) that can be opened and closed with respect to the main body of the device, and A recording roller gear 8 that meshes with a transmission gear 5 on the apparatus main body side is attached to the roller 7. When the opening/closing unit is closed, the recording roller 7 presses the recording paper 1 against the recording head 2, and the recording roller gear 8 presses the recording paper 1 against the transmission gear 5. They were configured to mesh together. Here, the moving direction of the recording roller 2 and recording roller gear 8 when the opening/closing unit moves in the opening direction is the direction shown by arrow A in FIG. It was on the same side.

0003

However, with this configuration, the motor 3 rotates to feed the paper, rotates the transmission gear 5 in the direction of arrow B, and the transmission gear 5 moves the recording roller gear 8 in the direction of arrow C. When rotated in the direction, the recording roller gear 8
A force in the direction of arrow A as well as a rotational force in the direction of arrow C acts on the opening/closing unit that holds the recording roller gear 8. Therefore, a force that pushes the opening/closing unit in the opening direction acts on the opening/closing unit holding the recording roller gear 8. The recording roller 7 may be separated and no force can be applied to press the regular recording head.
Phenomena such as misalignment between the printing portion of the recording head and the recording roller occur, resulting in problems such as printing not being possible or printing being blurred.

The present invention has been made in view of the above-mentioned problems, and prevents the application of force in the direction of separating the recording roller from the recording head when power is transmitted from the intermediate gear to the recording roller gear. An object of the present invention is to provide an image recording device that can perform good printing.

[0005]

[Means for Solving the Problems] In order to solve the above-mentioned problems, the present invention provides a transmission gear provided on the main body side of the apparatus for recording data when a recording roller provided on the opening/closing unit side is pressed against the recording head. The roller is arranged on the opposite side of the recording head.

[0006]

[Operation] According to the above-described structure, when the opening/closing unit is closed and the recording roller gear is engaged with the transmission gear, and rotational force is transmitted from the transmission gear to the recording roller gear, the recording roller gear is connected to the recording head. A pressing force is applied to the recording head, and as a result, a stable pressing force of the recording head can be obtained at all times, and good printing is possible.

[0007]

Embodiment FIG. 1 is a schematic perspective view of the main parts of an image recording apparatus according to an embodiment of the present invention, and FIG. 2 is a schematic side view thereof. It is shown with a code. 1 and 2, 1 is a recording paper, 2 is a recording head that prints on the recording paper 1, 3 is a motor, 4 is an intermediate gear, and 5 is a transmission gear. (not shown). 7 is a recording roller that conveys the recording paper 1 while pressing it against the recording head 2;
A recording roller gear is attached to the recording roller 7, and these are attached to an opening/closing unit (not shown) that can be opened and closed with respect to the main body of the apparatus. When the opening/closing unit is opened to the main body of the apparatus, the recording roller 7 moves in the direction of arrow A.
arranged to move in the direction. The transmission gear 5 described above differs from the conventional one in that, with respect to the recording roller 7 pressed against the recording head, there is a transmission gear 5 on the side opposite to the recording head 2.
Therefore, it is disposed below the recording roller gear 8 so as to mesh with the recording roller gear 8, but at a position that does not hinder the movement of the recording roller gear 8 when the opening/closing unit is opened/closed.

The operation of the image recording apparatus configured as described above will be explained below. When the opening/closing unit is closed, the recording roller 7 presses the recording paper 1 against the recording head 2, and the recording roller gear 8 meshes with the transmission gear 5. In this state, when the motor 3 rotates and the transmission gear 5 rotates in the direction of arrow D, the rotation is transmitted to the recording roller gear 8, and the recording roller 7 rotates in the direction of arrow C.
A recording paper 1 is conveyed, and a recording head 2 performs predetermined printing on the recording paper 1. At this time, since the transmission gear 5 is disposed below the recording roller gear 8, it applies an upward force to the recording roller gear 8, and thus a force in the direction of pressing the recording roller 7 against the recording head 2, that is, the opening/closing unit. Apply force in the closing direction. Therefore, during recording, the opening/closing unit does not open inadvertently and the recording roller 7 does not separate from the recording head 2, so that a stable pressing force of the recording head can be obtained at all times, and good printing is performed.

[0009]

Effects of the Invention As is clear from the above description, the present invention has the advantage of arranging the transmission gear provided on the main body side of the apparatus on the side opposite to the recording head with respect to the recording roller that is pressed against the recording head. By doing this, when the opening/closing unit is closed and the recording roller gear is engaged with the transmission gear, and the rotational force is transmitted from the transmission gear to the recording roller gear and printing is performed while feeding the paper, the recording roller gear is connected to the recording roller gear. A force is applied in the direction of pressing the head, and this has the effect that a stable pressing force of the recording head can be obtained at all times, and printing defects can be prevented.

[Brief explanation of the drawing]

FIG. 1 is a schematic perspective view of the main parts of an image recording device according to an embodiment of the present invention.

[Figure 2] Schematic side view

[Fig. 3] A schematic perspective view of the main parts of a conventional image recording device.

[Figure 4
] Its schematic side view

[Explanation of symbols]

1 Recording paper 2 Recording head 3 Motor 4 Intermediate gear 5 Transmission gear 7 Recording roller 8 Recording roller gear

Claims (1)

[Claims] 1. A recording head attached to an apparatus main body, a recording roller attached to an opening/closing unit that can be opened and closed with respect to the apparatus main body and presses recording paper against the recording head when the opening/closing unit is closed, and a recording roller that presses recording paper against the recording head when the opening/closing unit is closed. The recording roller includes a recording roller gear attached to a roller, and a drive device equipped with a transmission gear attached to the apparatus main body and meshing with the recording roller gear, and the transmission gear is pressed against the recording head. , an image recording apparatus characterized in that the recording head is disposed on the opposite side of the recording head.