KR100492092B1 - Apparatus for feeding paper of ink-jet printer - Google Patents

Abstract

The paper feeding apparatus of the inkjet printer according to the present invention includes a drive shaft, a feeding shaft on which a feeding roller is installed, a pickup shaft on which a pickup roller is installed, and a drive shaft on which a drive roller for transporting picked-up printing paper is provided; An ink jet printer feeding device comprising: a first gear installed at one end of a feeding shaft; A first idle gear geared to the first gear; A swing gear device in gear connection with the first idle gear; A second gear in gear connection with the swing gear device; A drive gear connected to the second gear and installed on the drive shaft to transmit driving force to the drive roller; A universal joint axially connected to the swing gear device; And a variable link unit configured to receive the driving force from the universal joint part and to transmit the driving force to the pickup shaft. According to this, as a simple structure using the universal joint portion, the driving force of the driving source can be transmitted even if the position of the pickup roller is changed according to the height of the printing paper loaded in the paper cassette, thereby reducing the space constraints in the installation. In addition, the configuration thereof is simple, and manufacturing cost can be reduced.

Description

Paper feeder for inkjet printers {APPARATUS FOR FEEDING PAPER OF INK-JET PRINTER}

The present invention relates to an inkjet printer, and more particularly, to a paper feeding apparatus of an inkjet printer having an improved structure.

An inkjet printer is a printing apparatus that outputs a desired image by ejecting ink onto printing paper through a printhead. Typically, an ink jet printer has a front insert front out (FIFO) type in which the supplying side of the paper and the ejecting side of the printed paper are the same. Has a feeding structure.

1 is a view schematically showing an inkjet printer having a general FIFO type paper feeding structure. Referring to FIG. 1, an inkjet printer supplies a print head 10 for ejecting ink onto a print paper, a paper feed cassette 20 on which print paper is loaded, and a loaded print paper to the print head 10. It includes a paper feeding device 30 for. The paper feeding device 30 includes a pickup roller 31 for picking up the loaded printing paper, a drive roller 32 for moving the picked up printing paper, and the transferred paper to the print head 10 at a predetermined interval. A feeding roller 33 for conveying, and first and second link portions 36 and 37 for adjusting the position of the pickup roller 31 in accordance with the height of the printing paper loaded in the paper feed cassette 20. . Reference numeral 38 in the drawing represents a support.

When the pickup roller 31 is driven, the printing paper loaded in the paper feed cassette 20 is separated by the separating wall 21 and picked up one by one. Then, the picked-up printing paper enters between the drive roller 32 and the pinch roller 34 which presses the drive roller 32 with a constant force, and is moved toward the feeding roller 33 by the rotation of the drive roller 32. . The printing paper moved to the feeding roller 33 is conveyed to the lower side of the print head 10 by the rotation of the feeding roller 33 and the friction roller 35 provided above the feeding roller 33. When the print paper reaches the paper guide 40 installed below the print head 10, the print head 10 moves left and right along the carriage movement shaft 11 to eject ink to form an image on the print paper. . Thereafter, the printing paper on which printing is completed is discharged to the outside by the discharge roller 50.

Here, since it takes time to complete the ink jetting on the left and right collinear lines on the printing paper while the print head 10 is moved, the feeding roller 33 moves the printing paper to the paper guide 40 at regular intervals. Transfer by a predetermined distance. An LF motor (not shown) for driving the feeding roller 33 is used for a line feed of such printing paper. This LF motor not only drives the feeding roller 33 but also selectively drives the pickup roller 31. That is, when the LF motor is rotated forward to drive the feeding roller 33 in the paper feed direction A, and the rotation direction thereof is changed, the feeding roller 33 is rotated in the reverse direction B and at the same time, the first link portion ( The driving force is transmitted to the pickup roller 31 by the 36 and the second link portion 37 so that the pickup roller 31 is rotated in the paper pickup direction C to pick up the paper. When the paper picked up by the pickup roller 31 reaches the feeding roller 33 which is being rotated in the reverse direction B by the drive roller 32, the LF motor rotates forward again to move the feeding roller 33 in the paper feed direction. Rotate to (A). At this time, the driving force to the pickup roller 31 is cut off so that the pickup roller 31 is placed on the printing paper in a stopped state, and the paper is spaced by the feeding roller 33 to the paper guide 40.

As the driving mechanism is picked up and transported, the height of the print paper loaded in the paper feed cassette is lowered. Accordingly, the first roller 36 and the second link unit pick up the loaded print paper. The position is adjusted by 37. That is, when the height of the loaded printing paper is lowered, the first link portion 36 and the second link portion 37 are rotated and moved counterclockwise, respectively, so that the pickup roller 31 corresponds to the height of the printing paper. Adjusted. On the contrary, even when printing paper is newly stacked on the paper feed cassette 20, the first link unit 36 and the second link unit 37 are turned and moved clockwise in accordance with the height of the printing paper so that the pick-up roller ( 31) is adjusted to correspond to the height of the printing paper.

However, the paper feeding device 30 of the conventional inkjet printer as described above is provided with first and second link portions 36 and 37 to adjust the position of the pickup roller 31 according to the height of the loaded printing paper. In addition, since the driving force from the driving source must be transmitted through the position fixed shaft 36a, the configuration is complicated and there are problems such as height and position constraints.

The present invention has been made in view of the above, and even if the height of the printing paper loaded in the paper feed cassette changes, the driving force can be transmitted to the pickup roller as a simple structure, and the inkjet printer can feed the paper which can reduce the manufacturing cost. The purpose is to provide a device.

The paper feeding apparatus of the inkjet printer according to the present invention for achieving the above object is a drive source for generating a driving force, a feeding shaft rotated by the drive source and the feeding roller is installed, and the pickup roller is rotated by the drive source 1. An ink jet printer feeding device comprising a pickup shaft and a drive shaft provided with a drive roller for transporting printing paper picked up by the pickup shaft, comprising: a first gear installed at one end of the feeding shaft; A first idle gear gear connected to the first gear; A swing gear device connected to the first idle gear; A second gear gear connected to the swing gear device; A drive gear connected to the second gear and installed on the drive shaft to transmit a driving force to the drive roller; A universal joint axially connected to the swing gear device; And a variable link unit configured to receive a driving force from the universal joint part and transmit a driving force to the pickup shaft.

The swing gear device may include a third gear gear connected to the first idle gear; A first swing gear geared to one side of the third gear and optionally geared to the second gear; A second idle gear gear connected to the other side of the third gear; A second swing gear geared to the second idle gear and optionally geared to the second gear; And a swing frame in which the third gear, the first and second swing gears, and the second idle gear are installed.

In addition, the third gear is installed on a swing shaft axially connected to one side of the universal joint portion.

According to a preferred embodiment of the present invention, the variable link unit includes a pickup drive gear installed on a pickup drive shaft axially connected to the other side of the universal joint part; A pickup gear gear connected to the pickup drive gear and configured to transmit a rotational driving force to the pickup roller; A one-way clutch installed on the pickup shaft and selectively transmitting driving force to the pickup roller according to a rotational direction of the pickup gear; A link housing having a first shaft hole in which the pickup shaft is inserted and supported, and a second shaft hole in which the pickup driving shaft is inserted and supported; And a guide part for guiding pivoting and movement of the link housing.

Here, the guide portion is a guide groove formed in the longitudinal direction in the longitudinal direction on the upper side of the link housing; And a guide rod inserted into the guide groove to support the link housing and fixed on the frame.

In addition, according to a preferred embodiment of the present invention, the variable link portion is interposed in the pickup drive gear and the pickup gear transfers the driving force, a predetermined number of reverse the rotational direction of the pickup drive gear and the rotational direction of the pickup gear It further includes a relay gear.

On the other hand, according to a preferred embodiment of the present invention, the universal joint portion and the first shaft portion axially connected to the swing shaft is the third gear is installed; A second shaft portion axially connected to a pickup drive shaft in which the pickup drive gear is installed; And a connector for axially connecting the first shaft portion and the second shaft portion.

In addition, the universal joint portion is formed with protrusions orthogonal to the axial direction at both ends of the connector, and the groove portion into which the protrusion is inserted is formed at the side opposite to the connector of the first and second shaft portions. Do.

The swing shaft and the first shaft portion may be integrally formed, and the pickup drive shaft and the second shaft portion may be integrally formed.

On the other hand, the paper feeding device of the ink-jet printer, it is preferable that the support hole is inserted into the pickup shaft is formed at one end, it is preferable to further include a support portion is formed on the other end of the rotary projection is inserted into the printer frame rotation.

The above objects and other features will become more apparent by describing the preferred embodiment of the present invention with reference to the accompanying drawings. For reference, in describing the embodiments of the present invention, the same reference numerals refer to the same parts as those in the related art.

2 and 3, the paper feeding device 100 of the inkjet printer according to the present invention includes a driving source 110, a feeding shaft 120 on which a feeding roller 123 is installed, and a swing gear device ( 140, a drive shaft 180 (see FIG. 5A) to which the drive rollers 183 (see FIG. 5A) are installed, a universal joint portion 150, a variable link portion 160, and a pickup roller 131 The pickup shaft 130 is installed, and the support 170 is included.

The drive source 110 is a power source for rotationally driving the feeding shaft 120, the drive shaft 180, and the pickup shaft 130, and a DC motor is generally used. The drive source 110 is also referred to as LF motor because it mainly takes charge of the line feed of the feeding roller 123. The timing belt 113 is connected to the motor, and the timing belt 113 is connected to the reduction gear 111.

The feeding shaft 120 is provided with a feeding gear 121 that receives the rotational driving force of the driving source 110 from the reduction gear 111, and a plurality of feeding rollers 123 are installed to surround the outer circumferential surface thereof. In addition, a first gear 125 is installed at one end of the feeding shaft 120 to transmit the rotational driving force to the swing gear device 140 which will be described later. This feeding roller 123 spaces the paper picked up by the pickup roller 131 toward the print head 10 (see Fig. 1). Here, the feeding shaft 120 is supported on a frame (not shown) of the inkjet printer.

Swing gear device refers to a gear device that can transmit and block the rotational force of the fixed gear to the peripheral gear through the planetary gear.

The swing gear device 140 according to an embodiment of the present invention receives a rotational driving force through the first idle gear 127 geared to the first gear 125. The swing gear device 140 includes a third gear 141, a first swing gear 143, a second idle gear 145, a second swing gear 147, and a swing frame 149. It is configured to include.

The third gear 141 is installed on the swing shaft 141a and gear-connected with the first idle gear 127 geared with the first gear 125 installed on the feeding shaft 120. The third gear 141 is connected to the first swing gear 143 and the second idle gear 145 to transmit the rotational driving force. In addition, the second swing gear 147 is gear-connected with the second idle gear 145. The swing frame 149 is rotatably supported by the third gear 141, the first swing gear 143, the second idle gear 145, and the second swing gear 147.

The swing gear device 140 configured as described above rotates the drive roller 183 in a fixed direction, that is, in a direction in which printing paper is moved to the feeding roller side, irrespective of the rotational direction of the drive source 110, as shown in FIG. 5A. As shown in FIG. 5B, when the third gear 141 is rotated in the clockwise direction, the first swing gear 143 is connected to the second gear 185. As shown in FIG. 5B, the third gear 141 is half When rotated clockwise, the second swing gear 147 is gear-connected with the second gear 185.

The drive shaft 180 is provided with a drive roller 183 to smoothly move the printing paper picked up by the pickup roller 131 to the feeding roller 123 side. The drive gear 181 is installed on the drive shaft 180 to be in gear connection with the second gear 185. The drive gear 181 receives power from the second gear 185 selectively geared to the first swing gear 143 or the second swing gear 147 by the driving mechanism of the swing gear device 140. As a result, the drive shaft 180 rotates, and thus the drive roller 183 rotates. At this time, the rotation of the drive roller 183, even if the second gear 185 is connected to any one of the first swing gear 143 and the second swing gear 147, the direction of rotation is the printing paper feed roller 123 It rotates constantly in the direction of feeding to the side. In the figure, reference numeral 187 denotes a pinch roller.

The variable link unit 160 includes a link housing 161, a pickup drive gear 163, a pickup gear 165, a one-way clutch 133, and a guide unit 169. The link housing 161 rotatably supports the pickup drive shaft 163a and the pickup shaft 130, and includes a first shaft hole 130a into which the pickup shaft 130 is inserted, and a pickup drive shaft 163a. The second shaft hole 163b is formed. The guide part 169 guides the rotation and the movement of the link housing 161.

The pickup drive gear 163 is installed on the pickup drive shaft 163a and rotates by receiving a driving force by the universal joint part 150 to be described later. The pickup gear 165 is installed on the pickup shaft 130 and is connected to the pickup drive gear 163 to receive power. The pickup roller 131 installed on the pickup shaft 130 is rotated by the driving force transmitted by the pickup gear 165 to pick up the printing paper. At this time, the pickup roller 131 is rotated only when the one-way clutch 133 is installed on the pickup shaft 130 and the pickup gear 165 is rotated in the direction of picking up the printing paper, and the pickup gear 165 is reversed. When rotating in the direction, the transmission of the driving force to the pickup roller 131 is blocked.

According to the preferred embodiment of the present invention, the relay gears 167a and 167b are installed between the pickup gear 165 and the pickup drive gear 163 in consideration of the installation space of the pickup apparatus 100. The relay gears 167a and 167b are provided in such a way that the rotational direction of the pickup drive gear 163 and the rotational direction of the pickup gear 165 are reversed.

The guide unit 169 includes a guide groove 169b formed at a predetermined length in the longitudinal direction of the link housing 161 and a guide rod 169a inserted therein. Therefore, the turning and the movement of the link housing 161 are guided by the guide groove 169b and the guide rod 169a according to the height of the printing paper loaded in the paper feed cassette 20 (see FIG. 1).

The universal joint portion 150 includes a first shaft portion 153, a second shaft portion 155, and a connector 151. The first shaft portion 153 is axially connected to the swing shaft 141a in which the third gear 141 is installed. According to a preferred embodiment of the present invention, the first shaft portion 153 and the swing shaft 141a are integrally formed. do. The second shaft portion 155 is axially connected to the pickup drive shaft 163a in which the pickup drive gear 163 is installed, and according to a preferred embodiment of the present invention, the second shaft portion 155 and the pickup drive shaft 163a are integrally formed. Is formed. The connector 151 allows the first shaft portion 153 and the second shaft portion 155 to be axially connected, and protrusions 151a perpendicular to the axial direction are formed at both ends thereof. In addition, in the first shaft portion 153 and the second shaft portion 155, grooves 153a and 155a into which the protrusions 151a are fitted are formed on both sides facing the connector 151, respectively.

Therefore, when the first shaft portion 153 is rotated by the rotation of the third gear 141, the connector 151 is rotated by the protrusion 151a fitted to the groove 153a, and the protrusion 151a located on the opposite side. As a result, the second shaft portion 155 is rotated to drive the pickup drive gear 163.

As shown in Fig. 5A, when the height of the print paper loaded in the paper feed cassette 20 is low, the link housing 161 is lowered until the upper side of the guide groove 169b is caught by the guide rod 169a. You are guided to. In this case, the connector 151 continuously transmits the driving force to the pickup driving gear 163 in the inclined state from the first shaft portion 153 to the second shaft portion 155. Therefore, the pick-up roller 131 is in contact with the printing paper to pick up.

On the contrary, as shown in FIG. 5B, when the height of the printing paper loaded in the paper feed cassette 20 is high, the link housing 161 until the lower side of the guide groove 169b is caught by the guide rod 169a. Guided upwards. At this time, the connector 151 continuously transmits the driving force to the pickup driving gear 163 while maintaining the substantially horizontal direction with the first shaft portion 153 and the second shaft portion 155. As such, even when the swing shaft 141a, that is, the first shaft portion 153 and the pickup drive shaft 163a, that is, the second shaft portion 155 is not located in a straight line, the rotation driving force is transmitted by the universal joint portion 150. do.

The supporter 170 has a support hole 172 into which the pickup shaft 130 is inserted at one end thereof so as to support the pivot housing 161 when the link housing 161 is pivoted and moved, and a rotation protrusion 171 is formed at the other end thereof. Rotating protrusions 171 are formed at both ends of the support (170) is rotatably inserted into a frame (not shown) of the printer. Therefore, as the printing paper loaded in the paper feed cassette 20 is consumed, the link housing 161 is pivoted using the pickup shaft 130 inserted into the support hole 172 and the first shaft hole 130a. While moving downward while turning, the support 170 is pivoted using the rotation protrusion 171 as the pivot axis.

5A and 5B, the operation of the paper feeding device 100 of the ink jet printer according to the embodiment of the present invention will be briefly described.

When the print signal is transmitted to the printer system, the drive source 110 rotates (counterclockwise in FIG. 5A) to rotate the pickup roller 131 in the paper pickup direction. At this time, the reduction gear 111 connected to the timing belt 113 is rotated counterclockwise, and the feeding gear 121 geared to the reduction gear 111 is rotated clockwise. Therefore, the feeding shaft 120 and the feeding roller 123 to which the feeding gear 121 is coupled are rotated in the clockwise direction.

In addition, the third gear 141 rotates in the clockwise direction through the first gear 125 and the first idle gear 127 provided at the end of the feeding shaft 120. As shown in FIG. 5A, the first swing gear 143 of the swing gear device 140 is gear-connected with the second gear 185 by the clockwise rotation of the third gear 141. Gear 185 is rotated clockwise. Therefore, the drive gear 181 geared to the second gear 185 is rotated in the counterclockwise direction, the drive shaft 180 in which the drive gear 181 is installed also rotates in the counterclockwise direction. In addition, the drive roller 183 installed in the drive shaft 180 is rotated in the counterclockwise direction to transfer the printing paper picked up by the pickup gear 131 to the feeding roller 123 side.

Meanwhile, the first shaft portion 153 of the universal joint portion 150 having the third gear 141 rotating in the clockwise direction also rotates in the clockwise direction, and is installed on the second shaft portion 155 by the connector 151. The pickup drive gear 163 also rotates clockwise. Then, the pickup gear 165 installed in the lower portion of the link housing 161 rotates in the counterclockwise direction to pick up the printing paper loaded in the paper feed cassette 20 sheet by sheet. The printing paper picked up one by one is moved to the feeding roller 123 by the drive roller 183 described above.

At this time, when the printing paper reaches the feeding roller 123 rotated in the opposite direction to the conveying direction of the printing paper, it is necessary to block the driving force transmitted to the pickup roller 131 to adjust the line feed interval of the conveyed printing paper. As a result, the driving source 110 rotates in the opposite direction, that is, clockwise as shown in FIG. 5B.

Accordingly, the rotational driving force in the opposite direction is transmitted to the third gear 141 of the swing gear device 140 by the gear connecting mechanism as shown in FIG. 5B, whereby the third gear 141 is counterclockwise. Will rotate. In addition, the swing frame 149 of the swing gear device 140 is rotated counterclockwise with the swing shaft 141a as the pivot axis so that the second swing gear 147 is gear-connected with the second gear 185. The drive roller 183 is rotated. At this time, the rotation direction of the drive roller 183 is not changed even if the gear is connected to any of the gear of the first swing gear 143 and the second swing gear 147. That is, it always rotates in the direction (counterclockwise direction in FIG. 5B) for transferring the picked-up printing paper to the feeding roller 123 side.

On the other hand, the first shaft portion 153, which is provided with the third gear 141 rotating in the counterclockwise direction also rotates in the counterclockwise direction, the second receiving the rotational driving force of the first shaft portion 153 by the connector 151 The shaft portion 155 also rotates counterclockwise, so that the pickup gear 165 rotates clockwise. At this time, the driving force is not transmitted to the pickup roller 131 by the one-way clutch 133 installed on the pickup shaft 130. Therefore, the printing paper is no longer picked up by the pickup roller 131, thereby adjusting the line feed interval of the printing paper. At this time, the pickup roller 131 is free to rotate when the fed printing paper is moved by the drive roller 183, so that the transfer resistance of the printing paper is not generated.

In this way, when the link housing 161 turns and moves according to the height of the printing paper loaded in the paper feed cassette 20, the link housing 161 is provided by the guide rod 169a along the guide groove 169b formed in the long hole shape. Is supported, and at this time, the supporter 170 supports the pickup shaft 130 and the link housing 161 inserted into the support hole 172 while pivoting the rotary protrusion 171 as the pivot axis.

As described above, according to the present invention, as a simple structure using the universal joint portion, the driving force of the driving source can be transmitted even if the position of the pickup roller varies depending on the height of the printing paper loaded on the paper feed cassette.

In addition, space constraints can be reduced in installation, and the construction thereof can be simplified, thereby reducing manufacturing costs.

As mentioned above, although this invention was shown and demonstrated with reference to the preferred embodiment for describing this invention, this invention is not limited to the structure and operation as it was shown and described. Rather, those skilled in the art will appreciate that many modifications and variations of the present invention are possible without departing from the spirit and scope of the appended claims. Accordingly, all such suitable changes and modifications and equivalents should be considered to be within the scope of the present invention.

1 is a configuration diagram schematically showing a conventional general inkjet printer,

2 is a perspective view showing a paper feeding device of an inkjet printer according to an embodiment of the present invention;

3 is an exploded perspective view showing the main configuration of the paper feeding device of the inkjet printer according to the embodiment of the present invention shown in FIG.

4 is a perspective view showing a main configuration of a paper feeding device of an inkjet printer according to an embodiment of the present invention shown in FIG.

5A and 5B are side views for explaining the operation of the paper feeding device of the ink jet printer according to the embodiment of the present invention.

<Description of Symbols for Major Parts of Drawings>

100: paper feeder 110: drive source

120: feeding shaft 130: pickup shaft

131: pickup roller 140: swing gear device

141: third gear 143: first swing gear

145: second idler gear 147: second swing gear

149: swing frame 150: universal joint

151 connector 151a protrusion

153: first shaft portion 155: second shaft portion

160: variable link unit 161: link housing

163: pickup drive gear 165: pickup gear

169: guide portion 169a: guide rod

169b: Guide Home

Claims (10)

A drive source for generating a driving force, a feeding shaft rotated by the drive source and a feeding roller is installed, a pickup shaft rotated by the drive source and a pickup roller is installed, and transfer of printing paper picked up by the pickup shaft. In the paper feeding device of the inkjet printer comprising a drive shaft, the drive roller is installed, A first gear installed at one end of the feeding shaft; A first idle gear in gear connection with the first gear; A drive gear installed on the drive shaft to transmit a driving force to the drive roller; A second gear transferring the driving force transmitted through the first idler gear to the drive gear; A variable link unit configured to transfer the driving force transmitted through the first idler gear to the pickup shaft, and to lift the pickup roller; A swing gear device that independently transmits a driving force of the first idler gear to the second gear by a swinging operation, or simultaneously transfers the driving force of the first idler gear to the variable link portion together with the second gear; And And a universal joint installed between the swing gear device and the variable link unit. According to claim 1, The swing gear device, A third gear in gear connection with the first idle gear; A first swing gear gear connected to one side of the third gear and optionally geared to the second gear; A second idle gear gear connected to the other side of the third gear; A second swing gear geared to the second idle gear and optionally geared to the second gear; And And a swing frame in which the third gear, the first and the second swing gears, and the second idle gear are installed. The method of claim 2, wherein the third gear, The ink jet printer feeding device, characterized in that installed on the swing shaft axially connected to one side of the universal joint portion. According to any one of claims 1 to 3, The variable link unit, A pickup drive gear installed on a pickup drive shaft axially connected to the other side of the universal joint part; A pickup gear connected to the pickup drive gear and configured to transmit a rotational driving force to the pickup roller; A one-way clutch installed on the pickup shaft and selectively transmitting driving force to the pickup roller according to a rotational direction of the pickup gear; A link housing having a first shaft hole in which the pickup shaft is inserted and supported, and a second shaft hole in which the pickup driving shaft is inserted and supported; And And a guide unit for guiding rotation and movement of the link housing. The method of claim 4, wherein the guide portion, A guide groove formed on the link housing at a predetermined length in a length direction thereof; And And a guide rod inserted into the guide groove to support the link housing and fixed on the frame. The method of claim 5, wherein the variable link unit, And a predetermined number of relay gears interposed between the pick-up drive gear and the pick-up gear to transmit a driving force, and to reverse the rotational direction of the pick-up drive gear and the rotational direction of the pick-up gear. The method according to claim 3 or 6, wherein the universal joint portion, A first shaft portion axially connected to a swing shaft on which the third gear is installed; A second shaft portion axially connected to a pickup drive shaft in which the pickup drive gear is installed; And And a connector for axially connecting the first shaft portion and the second shaft portion. The method of claim 7, wherein the universal joint portion, Both ends of the connector are provided with protrusions orthogonal to the axial direction, And a groove portion into which the protrusion is inserted, on both sides of the first shaft portion and the second shaft portion facing the connector. The method of claim 7, wherein The swing shaft and the first shaft portion are integrally formed; And the pickup drive shaft and the second shaft portion are integrally formed. The method according to claim 5 or 9, And a support part having a support hole into which the pick-up shaft is inserted is formed at one end thereof, and a support part formed at the other end of a rotation protrusion inserted and rotated on the printer frame.