JP2002046888A - Media delivery mechanism - Google Patents

Abstract

PROBLEM TO BE SOLVED: To select a resolution of delivery of media from a plural number of the resolutions. SOLUTION: This media delivery mechanism has a first gear fixed on a drive shaft, a second gear which is a gear fixed on the drive shaft and different from the first gear, a third gear of a specified reduction ratio arranged on a roller free to axially revolve and free to slide in the axial direction, gear- connected to the first gear direct or through a transmission gear and to rotate interlocked with rotation of the first gear, a fourth gear of a specified reduction ratio different from the reduction ratio of the third gear arranged on the roller free to axially revolve and free to slide in the axial direction, gear-connected to the second gear direct or through the transmission gear and to rotate interlocked with rotation of the second gear, a first electromagnetic clutch fixed on the roller and to magnetically adsorb the third gear by sliding it in the axial direction by magnetic force and a second electromagnetic clutch fixed on the roller and to magnetically adsorb the fourth gear by sliding it in the axial direction by magnetic force.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to a media feeding mechanism, and more particularly, to desired printing on various media (hereinafter, simply referred to as “media”) such as recording paper and OHP sheets. In various devices such as a printer or a cutting plotter that cuts a medium into a desired shape, or a device that can perform printing and cutting on a medium by combining a printer and a cutting plotter,
The present invention relates to a media feeding mechanism suitable for feeding media.

[0002]

2. Description of the Related Art Conventionally, in a printer for performing desired printing on a medium or a cutting plotter for cutting the medium into a desired shape, an ink jet head or a thermal head for performing printing on the medium has been used. By moving a carriage equipped with a cutter holder holding a print head and a cutter for cutting the media in the main scanning direction, and sending out the media by a media feeding mechanism in a sub scanning direction which is a direction orthogonal to the main scanning direction, The desired printing has been performed on the medium, and the medium has been cut into a desired shape.

[0003] In such an ink jet printer or a cutting plotter, the resolution at the time when the media feeding mechanism feeds the media is always constant. That is, the resolution of the media feeding by the conventional media feeding mechanism is set to a fixed resolution of, for example, 600 dpi.

[0004] For this reason, when printing is performed on a medium by a printer, even if an attempt is made to perform printing at a higher resolution, the resolution at which the medium is fed is fixed.
Since a higher resolution cannot be obtained, printing at a desired high resolution cannot be performed.

[0005] In order to obtain a higher resolution than a certain resolution, the medium may be fed with a smaller feed amount than the feed amount of the medium per unit time at the certain resolution. In other words, a higher resolution can be obtained by lowering the media feed speed at the certain resolution.

[0006] Further, when cutting a medium with a cutting plotter, even if an attempt is made to cut the medium in a shorter time, the resolution for feeding the medium is fixed, and the resolution cannot be reduced any further. However, there has been a problem that desired cutting cannot be performed in a short time.

In order to obtain a lower resolution than a certain resolution, the medium may be sent out at a larger feed amount than the medium feed amount per unit time at the certain resolution. In other words, if the speed is higher than the medium feeding speed at the certain resolution, a lower resolution can be obtained.

On the other hand, in recent years, a printer and a cutting plotter have been combined to have a function of printing on a medium and a function of cutting on a medium. An apparatus that can perform printing on a medium and perform cutting on a medium in the second mode (hereinafter, simply referred to as a “cutting printer”) is known.

However, even in such a cutting printer, the resolution of the medium feeding is set to a constant value, for example, 600 dpi.

Therefore, in the above-described cutting printer, when printing the medium by the function of selecting the first mode and printing on the medium, it is necessary to send the medium at a resolution higher than the predetermined resolution. Therefore, a sufficiently high resolution could not be obtained.

In the above-described cutting printer, when the medium is cut by the function of selecting the second mode and cutting the medium, the medium is sent at a resolution lower than the above-mentioned fixed resolution. Therefore, a sufficient amount of cutting could not be performed in a short time.

For this reason, such a cutting printer has a problem that the user may be dissatisfied with the finished print and the time required for cutting.

[0013]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned various problems of the prior art, and an object of the present invention is to increase the resolution of media feeding by a plurality of media. If you want to print at a high resolution on the media by enabling you to select from among the resolutions, you can send the media at a higher resolution and also want to cut the media in a short time In some cases, an attempt is made to provide a media feed mechanism that enables media to be sent at a lower resolution.

[0014]

According to one aspect of the present invention, there is provided a medium feeding mechanism for feeding a medium in a predetermined direction by rotation of a roller driven by a driving source. , A first gear fixed to a drive shaft of a drive source, a second gear different from the first gear, a second gear fixed to the drive shaft of the drive source, The roller is configured to be rotatable around the axis and slidable in the axial direction on a roller that sends out the medium, and is gear-coupled to the first gear directly or via a predetermined transmission gear. A third gear having a predetermined reduction ratio that rotates in conjunction with the rotation of the first gear that rotates with the rotation of the shaft, and the roller that feeds out the medium with the rotation is rotatable about the axis and is in the axial direction. To slide freely And a gear that is gear-coupled to the second gear directly or via a predetermined transmission gear, and that rotates in conjunction with the rotation of the second gear that rotates with the rotation of the drive shaft of the drive source. And a fourth gear having a predetermined reduction ratio different from the reduction ratio of the third gear;
A first electromagnetic clutch that is fixed on the roller and magnetically attracts the third gear by sliding the third gear in the axial direction with magnetism, and fixed on the roller,
A second electromagnetic clutch that magnetically attracts the fourth gear by sliding the fourth gear in the axial direction by magnetism, and when the first electromagnetic clutch magnetically attracts the third gear,
The second electromagnetic clutch does not magnetically attract the fourth gear, and when the second electromagnetic clutch magnetically attracts the fourth gear, the first electromagnetic clutch does not attract the third gear. Is not magnetically attracted.

Therefore, according to the first aspect of the present invention, the rotation of the first gear fixed to the drive shaft of the drive source is rotatable around the axis with respect to the roller and is in the axial direction. Is transmitted to a third gear slidably disposed on the other hand,
The rotation of the second gear fixed to the drive shaft of the drive source is transmitted to a fourth gear disposed rotatably around the axis and slidable in the axial direction with respect to the roller.

Then, when the first electromagnetic clutch magnetically attracts the third gear (at this time, the second electromagnetic clutch does not magnetically attract the fourth gear), the first electromagnetic clutch does not attract the fourth gear. The rotation of a third gear disposed rotatably around the axis and slidable in the axial direction is transmitted to the roller via the first electromagnetic clutch, and the roller is driven in accordance with the reduction ratio of the third gear. At a first speed.

On the other hand, when the second electromagnetic clutch is magnetically attracting the fourth gear (in this case, the first electromagnetic clutch is not magnetically attracting the third gear), the second electromagnetic clutch is in contact with the roller. The rotation of a fourth gear disposed rotatably around the axis and slidable in the axial direction is transmitted to the roller via the second electromagnetic clutch, and the roller is driven according to the reduction ratio of the fourth gear. At a second speed.

Here, the reduction ratio of the third gear and the reduction ratio of the fourth gear are, for example, the reduction ratio of the third gear is higher than the reduction ratio of the fourth gear.
(Reduction ratio of third gear>
In such a case, the roller rotates at a first speed at a lower speed than at a second speed.

Therefore, the reduction ratio of the third gear and the reduction ratio of the fourth gear are, for example, the reduction ratio of the third gear is higher than the reduction ratio of the fourth gear.
(Reduction ratio of third gear>
When the first electromagnetic clutch is magnetically attracting the third gear, the roller operates at a lower speed (higher resolution) than the second speed. Since the medium is rotated at the first speed and the medium is fed, higher resolution printing can be performed on the medium as compared with the case where the roller is rotated at the second speed and the medium is fed.

On the other hand, the reduction ratio of the third gear and the reduction ratio of the fourth gear, for example, the reduction ratio of the third gear is larger than that of the fourth gear (third gear). When the second electromagnetic clutch magnetically attracts the fourth gear, the roller is higher than the first speed. Rolls out the media at a second speed (low resolution) so that the rollers are moved to the first speed.
It is possible to perform a large amount of cutting on the medium in a shorter time as compared with a case where the medium is sent out while rotating at a speed of.

[0021] The invention according to claim 2 of the present invention has a function of printing on a medium and a function of cutting on the medium, and prints on the medium in the first mode. A media feed mechanism for cutting the media in the second mode, wherein the media feed mechanism feeds the media in a predetermined direction by rotation of a roller driven by the drive source. A first gear fixed to a shaft, and a second gear different from the first gear, the second gear being fixed to the drive shaft of the drive source.
And a roller for sending out the medium as it rotates, being disposed so as to be rotatable around the axis and slidable in the axial direction, and gear-coupled to the first gear directly or via a predetermined transmission gear. A third gear having a predetermined reduction ratio that rotates in conjunction with the rotation of the first gear that rotates with the rotation of the drive shaft of the drive source; The drive source is rotatably and slidably disposed in the axial direction, is gear-coupled to the second gear directly or via a predetermined transmission gear, and rotates with the rotation of the drive shaft of the drive source. A fourth gear having a predetermined reduction ratio different from the reduction ratio of the third gear, the fourth gear being a gear that rotates in conjunction with the rotation of the second gear; Gear 3 slides axially by magnetism A first electromagnetic clutch for magnetic attraction by, is fixed onto the roller, the fourth
And a second electromagnetic clutch that magnetically attracts the gear by sliding the gear in the axial direction by magnetism, and in the first mode in which printing is performed on a medium, the first electromagnetic clutch operates in the third mode. The second electromagnetic clutch does not magnetically attract the fourth gear and the second electromagnetic clutch does not attract the fourth gear in the second mode in which cutting is performed on the medium. The first electromagnetic clutch prevents the third gear from being magnetically attracted.

Therefore, according to the second aspect of the present invention, the rotation of the first gear fixed to the drive shaft of the drive source is rotatable around the shaft with respect to the roller and is in the axial direction. Is transmitted to a third gear slidably disposed on the other hand,
The rotation of the second gear fixed to the drive shaft of the drive source is transmitted to a fourth gear disposed rotatably around the axis and slidable in the axial direction with respect to the roller.

In the first mode, the first electromagnetic clutch magnetically attracts the third gear,
When the second electromagnetic clutch does not magnetically attract the fourth gear, the rotation of the third gear, which is disposed so as to be rotatable around the shaft and slidable in the axial direction with respect to the roller, is rotated by the third gear. The power is transmitted to the roller via the first electromagnetic clutch, and the roller rotates at a first speed according to the reduction ratio of the third gear.

On the other hand, in the second mode, when the second electromagnetic clutch magnetically attracts the fourth gear and the first electromagnetic clutch does not magnetically attract the third gear, the roller The rotation of a fourth gear disposed rotatably around the axis and slidable in the axial direction is transmitted to the roller via the second electromagnetic clutch, and the roller
At a second speed corresponding to the reduction ratio of the gear.

Here, the speed reduction ratio of the third gear and the speed reduction ratio of the fourth gear are defined, for example, in claim 3 of the present invention.
As described above, the reduction ratio of the third gear is larger than the reduction ratio of the fourth gear (reduction ratio of the third gear> reduction ratio of the fourth gear). , The roller rotates at a first speed at a lower speed than at a second speed.

Therefore, the speed reduction ratio of the third gear and the speed reduction ratio of the fourth gear are, for example, the same as the speed reduction ratio of the third gear of the present invention. When the reduction ratio of the fourth gear is set to be larger than the reduction ratio of the fourth gear (the reduction ratio of the third gear> the reduction ratio of the fourth gear), the first mode is used in the first mode.
When the electromagnetic clutch of (3) magnetically attracts the third gear, the roller rotates at the first speed (higher resolution) lower than the second speed and feeds the medium, so that the roller is moved to the second speed. It is possible to perform higher-resolution printing on the medium as compared with the case where the medium is sent out while rotating at a speed of.

On the other hand, the reduction ratio of the third gear and the reduction ratio of the fourth gear are set, for example, such that the reduction ratio of the third gear is greater than that of the third invention. When the setting is made to be larger than the reduction ratio of the fourth gear (the reduction ratio of the third gear> the reduction ratio of the fourth gear), the second electromagnetic clutch operates in the second mode in the fourth mode. When the gear is magnetically attracted, the roller rotates at a second speed higher (lower resolution) than the first speed and feeds the medium. As compared with the case of sending out, a large amount of cutting can be performed on the medium in a shorter time.

[0028]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an example of an embodiment of a media feeding mechanism according to the present invention will be described in detail with reference to the accompanying drawings.

In the following description of the embodiment, a case where the media feeding mechanism according to the present invention is applied to a cutting printer will be described.

In the following description, only the media feeding mechanism according to the present invention will be described in detail, and the configuration other than the media feeding mechanism and whether the printing operation, the cutting operation, or the operation mode is the first mode will be described. Since a conventionally known technique can be applied to the setting process of the second mode or the like, a detailed description of its configuration and operation will be omitted.

First, FIG. 1A shows a cutting / feeding device having an embodiment of a media feeding mechanism according to the present invention.
A front explanatory view showing a schematic configuration of the printer is shown,
FIG. 1B is an explanatory diagram of the left side of the cutting printer shown in FIG. 1A, and FIG.
FIG. 1A is a right side view of the cutting printer shown in FIG. 1A, and FIG. 1D is a top view of the cutting printer shown in FIG. 1A.

FIG. 2 is a structural explanatory view showing a schematic internal structure of the main body of the cutting printer shown in FIG. 1, and a left cover member 18L (described later).
And a state where the right cover member 18R (described later) is removed.

The cutting printer 10 has a function of performing printing on a medium and a function of performing cutting on a medium. The printer 10 performs printing on the medium in a first operation mode. In the second mode, a main unit 12 that performs cutting on a medium, and a base unit 14 on which the main unit 12 is mounted
And is configured.

Here, the main body portion 12 is provided on the base portion 14 so as to extend in the main scanning direction, and at right and left ends of the bottom surface member 16 at right angles to the bottom surface member 16. Left cover member 18L and right cover member 18R
And a central wall 20 connecting the left cover member 18L and the right cover member 18R, and fixedly disposed on a wire (not shown) disposed parallel to the central wall 20 and movably in the main scanning direction. Carriage 22, a thermal head 24, which is a print head disposed on the carriage 22 so as to face the medium, and a cutter holder 26 disposed on the carriage 22 so as to face the medium.
And the like.

Next, FIG. 3A which is a partially enlarged view of FIG.
FIG. 3B, which is a view taken in the direction of arrow B in FIG.
FIG. 3C, which is a view as viewed from the arrow C in FIG.
The internal structure of the cutting printer 10 will be described in more detail with reference to FIG. 4 which is an enlarged view of a main part of FIG. 3A and FIG. 5 which is an enlarged view of a main part of FIG.

That is, in the cutting printer 10, the roller 32 capable of feeding the medium in the sub-scanning direction by rotation is provided by the left support frame 30L, the center support frame 30C, and the right support frame 30R which are erected from the bottom member 16. Are rotatably arranged.

On the other hand, the main scanning direction support frame 34 suspended between the left support frame 30L and the center support frame 30C has a left pinch roller 36L and a right pinch roller 36R facing the roller 32.
Are rotatably arranged. The left pinch roller 36L and the right pinch roller 36R are
It is pressed against the roller 32 by a predetermined urging force.

Therefore, in order to feed the medium in the sub-scanning direction, the medium is sandwiched between the roller 32 and the left pinch roller 36L and the right pinch roller 36R pressed against the roller 32, and in this state, What is necessary is just to rotate the roller 32 in a desired direction. As a result, the medium is sent out in a direction corresponding to the rotation of the roller 32.

The right support frame 30R is provided with a motor 38 as a drive source. And
A first gear 42 is formed at a right end 40R of the drive shaft 40 of the motor 38, while a second gear 44 is formed at a left end 40L of the drive shaft 40 of the motor 38.

The roller 32 is provided with a third gear 46, which is gear-coupled to the first gear 42, via a bearing 48 so as to be rotatable around the axis and slidable in the axial direction. The right side of the third gear 46 has an armature 5
0 is provided.

Further, a second gear 44 is provided on the roller 32.
And a fourth gear 54 gear-coupled via the transmission gear 52
It is arranged to be rotatable around the axis and slidable in the axial direction via a bearing 56. An armature 58 is provided on a right side surface of the fourth gear 54.

Here, the reduction ratio of the third gear 46 and the reduction ratio of the fourth gear 54 are larger in the reduction ratio of the third gear 46 than in the fourth gear 54 (third gear). (Reduction ratio of 46> reduction ratio of fourth gear 54).

Further, an electromagnetic clutch 60 is disposed at the right end 32R of the roller 32. The electromagnetic clutch 60 is opposed to an armature 50 formed on the right side surface of the third gear 46, and has a rotor portion 62 fixed to the roller 32 and a field portion disposed in an annular recess 62 a of the rotor portion 62. Has a core 64 and an electromagnetic coil 66 disposed in the field core 64;

On the other hand, an electromagnetic clutch 70 is provided near the fourth gear 54 of the roller 32. The electromagnetic clutch 70 faces an armature 58 formed on the right side surface of the fourth gear 54, and has a rotor 72 fixed to the roller 32 and an annular recess 72 a of the rotor 72.
And a field core 74 disposed therein.
And an electromagnetic coil 76 disposed in the core 74.

Although not shown, the third gear 46
Are positioned so as to be slidable between the widths W1 (see FIG. 5) along the axial direction of the roller 32.
The fourth gear 54 has a width W2 along the axial direction of the roller 32.
(FIG. 4) are positioned so as to be slidable.

In the above configuration, when the drive shaft 40 of the motor 38 is rotated, the rotation of the drive shaft 40 is transmitted to the third gear 46 which is gear-coupled with the first gear 42, and the second gear 44 The power is transmitted to the fourth gear 54 that is gear-coupled via the transmission gear 52.

Here, the case where the operation mode of the cutting printer 10 is the first mode will be described with reference to FIG.

When the operation mode is the first mode, the electromagnetic clutch 60 is automatically operated and the electromagnetic clutch 60
Magnetically attracts the armature 50 formed in the third gear 46 to the rotor portion 62, and the electromagnetic clutch 60 and the third gear 4
6 are clutch-coupled. On the other hand, in the first mode, the electromagnetic clutch 70 is not operated, and the electromagnetic clutch 70
And the fourth gear 54 are not magnetically attracted.

Therefore, when the operation mode is the first mode, the rotation of the third gear 46 is transmitted to the roller 32 via the electromagnetic clutch 60, and the roller 32 has the first resolution corresponding to the reduction ratio of the third gear 46. Spin at speed.

On the other hand, when the operation mode is the second mode, the electromagnetic clutch 70 is automatically operated, and the electromagnetic clutch 70 is connected to the armature 58 formed on the fourth gear 54.
Is magnetically attracted to the rotor portion 72, and the electromagnetic clutch 70 and the fourth gear 54 are clutch-coupled. On the other hand, in the second mode, the electromagnetic clutch 60 is not operated, and the electromagnetic clutch 60 and the third gear 46 are not magnetically attracted.

Therefore, when the operation mode is the second mode, the rotation of the fourth gear 54 is transmitted to the roller 32 via the electromagnetic clutch 70, and the roller 32 has the second resolution corresponding to the reduction ratio of the fourth gear 54. Spin at speed.

Here, the reduction ratio of the third gear 46 and the reduction ratio of the fourth gear 54 are larger in the reduction ratio of the third gear 46 than in the fourth gear 54 (the third gear). 46> reduction ratio of the fourth gear 54).
The roller 32 rotates at a higher resolution (lower speed) in the first mode rotating at the speed of the first resolution than in the second mode rotating at the speed of the second resolution.

Therefore, in the first mode, the roller 32 rotates at a speed of the first resolution higher than the second resolution and feeds out the medium.
As compared with the case where the medium is fed at the speed of the resolution, it is possible to perform higher-resolution printing on the medium.

On the other hand, in the second mode, the rollers 32
Is rotated at a second resolution speed lower than the first resolution speed to send out the media, so that the roller 32 is rotated at the first resolution speed and the media is sent out, so that A large amount of cutting can be performed in a short time.

The above embodiment may be modified as described in the following (1) to (6).

(1) In the above embodiment, the case where the present invention is applied to a cutting printer has been described. However, the present invention is not limited to this. For example, an ink jet printer, The present invention can be applied to a printer having only a printing function such as a thermal printer or a thermal transfer printer, or a printer having only a cutting function such as a cutting plotter. That is, the present invention can be applied to an apparatus that needs to transport media.

(2) In the above embodiment, the reduction ratio of the third gear 46 and the reduction ratio of the fourth gear 54
Although the reduction ratio of the gear 46 is set to be larger than the reduction ratio of the fourth gear 54 (reduction ratio of the third gear 46> reduction ratio of the fourth gear 54), Needless to say, the reduction ratio of the fourth gear 54 is larger than the reduction ratio of the third gear 46 (the reduction ratio of the fourth gear 54> the reduction ratio of the third gear 46). May be set as follows.

(3) In the above embodiment, when the operating mode of the cutting printer 10 is the mode 1, the third gear 4 is automatically activated by the electromagnetic clutch 60.
6 is magnetically attracted (in this case, the fourth gear 54 is not magnetically attracted by the electromagnetic clutch 70). On the other hand, when the operating mode of the cutting printer 10 is mode 2, the electromagnetic force is automatically applied. The fourth gear 54 by the clutch 70
(In this case, the third gear 46 is not magnetically attracted by the electromagnetic clutch 60). However, the present invention is not limited to this, and is independent of the operation mode. Thus, the electromagnetic clutch 60 and the electromagnetic clutch 70 may be controlled.

(4) In the above-described embodiment, the first gear 42 and the third gear 46 are directly gear-coupled. However, the present invention is not limited to this. A first gear 42 and a third gear 46 are connected via gears.
May be indirectly gear-coupled.

(5) In the above-described embodiment, the second gear 44 and the fourth gear 54 are indirectly gear-coupled. However, the present invention is not limited to this. The second gear 44 and the fourth gear 54 may be gear-coupled indirectly.

(6) The above-described embodiment and the modifications shown in (1) to (5) may be appropriately combined.

[0062]

Since the present invention is configured as described above, it is possible to select a resolution for feeding the medium from among a plurality of resolutions, and to print at a high resolution on the medium. In this case, the media can be sent at a higher resolution, and when it is desired to cut the media in a short time, the media can be sent at a lower resolution.

[Brief description of the drawings]

FIG. 1A is a front explanatory view showing a schematic configuration of a cutting printer provided with an example of an embodiment of a media feeding mechanism according to the present invention, and FIG. 1B is a front view of the cutting printer shown in FIG. It is a left side explanatory view, (c) is a right side explanatory view of the cutting printer shown in (a), (d) is an upper side explanatory view of the cutting printer shown in (a).

FIG. 2 is a configuration explanatory diagram showing a schematic configuration inside a main body of the cutting printer shown in FIG. 1;

3A is a partially enlarged view of FIG. 2, FIG. 3B is a view as viewed from an arrow B in FIG. 3A, and FIG. 3C is a view as viewed from an arrow C in FIG.

FIG. 4 is an enlarged view of a main part for describing an operation in a first mode.

FIG. 5 is an enlarged view of a main part for describing an operation in a second mode.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Cutting printer 12 Main body part 14 Base part 16 Bottom member 18L Left cover member 18R Right cover member 20 Central wall 22 Carriage 24 Thermal head 26 Cutter holder 30L Left support frame 30C Central support frame 30R Right support frame 32 Roller 34 Main scanning direction support frame 36L Left pinch roller 36R Right pinch roller 38 Motor 40 Drive shaft 40L Left end of drive shaft 40R Right end of drive shaft 42 First gear 44 Second gear 46 Third gear 48 Bearing 50 Armature 52 Transmission gear 54 Fourth gear 56 Bearing 58 Armature 60, 70 Electromagnetic clutch 62, 72 Rotor part 62a, 72a Annular recess 64, 74 Field core 66, 76 Electromagnetic coil

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Masumi Hoshino 1-6-4 Shintoda, Hamamatsu City, Shizuoka Prefecture Roland D. Gee. (72) Inventor Koji Ito 1-6-4 Shintoda, Hamamatsu-shi, Shizuoka Prefecture Roland D. Gee. F term (for reference) 2C058 AB08 AC06 AD09 AE02 AF20 AF29 AF51 BA01 BA08 BA15 LA04 LA14 LB06 LB42 3F049 AA10 DA11 DA12 EA01 EA10 LA07 LB03

Claims (3)

[Claims] 1. A medium feeding mechanism for feeding a medium in a predetermined direction by rotation of a roller driven by a driving source, wherein: a first gear fixed to a driving shaft of the driving source; A fixed gear, a second gear different from the first gear, and a roller that feeds out the medium with the rotation, and is disposed so as to be rotatable around the axis and slidable in the axial direction. A gear having a predetermined reduction ratio, which is gear-coupled to the first gear directly or via a predetermined transmission gear and rotates in conjunction with the rotation of the first gear that rotates with the rotation of the drive shaft of the drive source. A third gear, and the roller that feeds out the medium with the rotation, is disposed so as to be rotatable around the axis and slidable in the axial direction, and directly with the second gear or via a predetermined transmission gear. Gear coupling A gear that rotates in conjunction with the rotation of the second gear that rotates with the rotation of the drive shaft of the drive source, and that has a predetermined reduction ratio different from the reduction ratio of the third gear. A first electromagnetic clutch fixed on the roller and magnetically attracting the third gear by sliding the third gear in the axial direction by magnetism; and a first electromagnetic clutch fixed on the roller and And a second electromagnetic clutch that magnetically attracts the gear 4 by sliding the gear 4 in the axial direction by magnetism. When the first electromagnetic clutch magnetically attracts the third gear, the second electromagnetic clutch The electromagnetic clutch does not magnetically attract the fourth gear, and when the second electromagnetic clutch magnetically attracts the fourth gear, the first electromagnetic clutch does not magnetically attract the third gear. Media feed mechanism. 2. A function for performing printing on a medium and a function for performing cutting on a medium, performing printing on the medium in a first mode,
A media feeding mechanism in a device for cutting a medium in a second mode, wherein the medium feeding mechanism feeds the medium in a predetermined direction by rotation of a roller driven by a driving source, the medium being fixed to a driving shaft of the driving source. A first gear, a gear fixed to the drive shaft of the drive source, a second gear different from the first gear, and a roller for feeding a medium with rotation around the axis. The first gear, which is arranged rotatably and slidably in the axial direction, is gear-coupled to the first gear directly or via a predetermined transmission gear, and rotates with the rotation of the drive shaft of the drive source. A third gear having a predetermined reduction ratio that rotates in conjunction with the rotation of the first gear; and a roller that is capable of rotating around an axis and sliding in the axial direction by the roller that sends out the medium with the rotation. And is gear-coupled to the second gear directly or via a predetermined transmission gear, and interlocked with the rotation of the second gear that rotates with the rotation of the drive shaft of the drive source. A fourth gear having a predetermined reduction ratio different from the reduction ratio of the third gear, the fourth gear being fixed on the roller, and the third gear being axially slid by magnetism; A first electromagnetic clutch for moving and magnetically attracting, and a second electromagnetic clutch fixed on the roller and magnetically attracting by sliding the fourth gear in the axial direction by magnetism; In a first mode in which printing is performed on a medium, the first electromagnetic clutch magnetically attracts the third gear, and the second electromagnetic clutch does not magnetically attract the fourth gear, Cutting media Cormorants second
In the mode, the second electromagnetic clutch is connected to the fourth electromagnetic clutch.
And a first electromagnetic clutch that does not magnetically attract the third gear. 3. The medium feeding mechanism according to claim 2, wherein the reduction ratio of the third gear and the reduction ratio of the fourth gear are such that the reduction ratio of the third gear is higher than the fourth gear. Media feed mechanism that is configured to be larger than the gear reduction ratio of the gear.