JPH04303673A - Paper feed mechanism of recording device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a paper feeding mechanism for a recording apparatus, and more particularly to a paper feeding mechanism for a recording apparatus having a motor as a paper feeding means.

0002

2. Description of the Related Art FIG. 2 is an external view of a typewriter as an example of a conventional recording device of this type. In the figure, reference numeral 51 denotes a carriage section for printing, on which an ink ribbon cassette 52 for printing is mounted. The carriage part 51
is configured to reciprocate along a shaft 54 via a belt 53 by a drive source (not shown).

FIGS. 3 and 4 are diagrams showing a paper feeding mechanism section of the recording apparatus. 55 is a paper feed motor, and the power of this motor 55 is transmitted to a platen gear 57 via an intermediate gear 56, and the paper is fed by a platen (not shown) integrated with the platen gear 57.

[0004] At this time, as a means to improve paper feeding accuracy, a method is sometimes taken to reduce backlash between gears from the pinion 58 of the paper feeding motor 55 to the platen gear 57, which is a power transmission gear.

In the paper feed mechanism shown in FIG. 3, a tension spring 5 is installed at a lower mounting position 55a of the paper feed motor 55.
9 is attached, and the pinion 58 of the paper feed motor 55 and the intermediate gear 56 are pressed against the platen gear 57 by the tension spring 59 with the upper attachment position 55b as the center of rotation.

Further, in the paper feeding mechanism shown in FIG. 4, a torsion coil spring 61 is provided between the upper mounting position 55b of the paper feeding motor 55 and the frame 60, and the lower mounting position 55a is the center of rotation. The torsion coil spring 61 is pressed against the platen gear 57 in the same manner as the paper feeding mechanism section explained in FIG.

[0007]

However, in the conventional example described above, the aforementioned tension spring 59 or torsion coil spring 61 is required when installing the paper feed motor 55, which increases the cost together with the installation work. There was a drawback that it could be stored away. Further, the paper feed motor 5
It was also necessary to have a means for removing the play in the axial direction of the spring mounting position relative to the spring.

Therefore, the present invention has been made to solve the above-mentioned problems of the prior art, and its objects are to reduce the backlash between the paper feed motor and the platen gear, and to reduce the backlash in the axial direction of the paper feed motor. It is an object of the present invention to provide a paper feeding mechanism for a recording apparatus that is configured to remove backlash at the same time.

[0009]

[Means for Solving the Problems] A typical means for solving the above problems and applied to the embodiments described below has a frame made of an elastic material, and uses the power of a drive source to drive a platen. The paper feeding mechanism of the recording apparatus that feeds paper by means of the present invention is characterized in that a locking member for pressing and fixing the drive source against the frame is provided.

0010

[Operation] According to the present invention, since the locking member for pressing and fixing the drive source is provided on the frame formed of an elastic material, it is possible to reduce the backlash of the paper feeding means, and also It is possible to prevent the drive source from wobbling in the axial direction.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a side view and a plan view of a paper feeding mechanism of a recording apparatus showing an embodiment of the present invention.

To explain the structure of the paper feeding mechanism of the recording apparatus shown in FIG.
The rotation shaft 5 rotates the platen 6, which is integrated with the platen gear 4, to feed the paper. Further, reference numeral 7 denotes a frame, which is made of an elastic material, and the rotating shaft 5 is rotatably supported by the frame 7. Further, the frame 7 is provided with a claw portion 8 which is a locking member for pressing and fixing the paper feed motor.

[0013] In the present invention, in order to reduce the backlash between the pinion 2 of the paper feed motor 1 and the platen gear 4, and furthermore to prevent the rotatable paper feed motor 1 from wobbling in the axial direction, the frame 7 is provided with a The provided claw portion 8 presses the paper feed motor 1 toward the platen 5 and the frame 7 and fixes it.

When installing the paper feed motor 1,
By pushing it along the taper to the specified position,
As shown in FIG. 2, the upper mounting position 1b of the flange part is engaged with the claw part 8 provided on the frame 7, and the shaft is rotated about the lower mounting position 1a, which is the flange part of the paper feed motor 1. It is possible to eliminate directional wobbling, and at the same time, it is also possible to reduce backlash between the pinion 2 and the platen gear 4.

In the present invention, the reduction of backlash and the prevention of rattling of the paper feed motor 1 have been described in order to improve the paper feed accuracy, but if the motor attachment part is made of an elastic material, it can be used with a wheel motor, a carriage motor, etc. It can also be applied to various motors.

[0016]

[Effects of the Invention] As explained above, according to the present invention,
Since a claw part is provided to press and fix the paper feed motor, which is the drive source, on the frame made of an elastic material, it is possible to reduce the backlash of the paper feed mechanism, and at the same time, the shaft of the paper feed motor can be reduced. It is also possible to prevent directional wobbling. Therefore, paper feeding accuracy is good,
Moreover, it is possible to obtain a paper feeding mechanism for a recording device at low cost.

[Brief explanation of drawings]

FIG. 1 is a side view and a plan view of a paper feeding mechanism of a recording apparatus showing an embodiment of the present invention.

FIG. 2 is an explanatory diagram showing a conventional recording device such as a typewriter.

FIG. 3 is a schematic diagram showing an example of a paper feeding mechanism of a conventional recording apparatus.

FIG. 4 is a schematic diagram showing an example of a paper feeding mechanism of a conventional recording apparatus.

[Explanation of symbols]

1 is a paper feed motor, 1a is a lower mounting position, 1b is an upper mounting position, 2 is a pinion, 3 is an intermediate gear, 4 is a platen gear, 5 is a rotating shaft, 6 is a platen, 7 is a frame, 8 is a claw part be. Patent Applicant Canon Inc. Agent Patent Attorney Shukichi Nakagawa Reference Number 1917049

Claims (1)

[Claims] 1. In a paper feeding mechanism of a recording device that has a frame made of an elastic material and uses power from a drive source to feed paper by a platen, a paper feed mechanism for pressing and fixing the drive source against the frame is provided. A paper feeding mechanism for a recording device, characterized in that it is configured by providing a locking member.