JP2011042484A - Printer - Google Patents

Abstract

Provided is a printer capable of printing on a recording sheet satisfactorily without a problem of conveyance of the recording sheet.
A printer has a roll paper storage unit for storing a roll-shaped recording paper, and stores the roll paper so that the roll paper storage unit can be inserted into a core portion of the recording paper from a bottom surface to a side surface of a predetermined height. A near-end detection unit 24 including a detection lever 63 arranged in a protruding state is provided, and the detection lever 63 can be moved to a retracted position B that does not protrude into the roll paper storage unit.
[Selection] Figure 10

Description

  The present invention relates to a printer for printing on roll-shaped recording paper.

In a POS (Point-Of-Sale) system or the like, a printer such as a receipt printer that performs printing on roll-shaped recording paper is used.
As this type of printer, the roll diameter is reduced by the use of the recording paper, the detector that is in contact with the side surface of the roll-shaped recording paper, the detector enters the space portion of the roll core, There is known one having paper remaining amount detecting means for detecting that the remaining amount of recording paper has become a certain amount or less (near-end detection) (for example, see Patent Document 1). By this detection, the operator knows that the time for replacing the recording paper is approaching, and the recording paper can be replaced when the operation is completed. It is possible to avoid replacing the recording paper while waiting for the customer to run out of paper suddenly during the printing of the receipt.

Japanese Patent Laid-Open No. 9-295436

When printing is performed on a label by the printer, a label recording paper in which a label coated with an adhesive on the back side is affixed to release paper may be used. The pressure-sensitive adhesive may adhere to the side surface that is wound in the shape of an adhesive.
Therefore, when such a recording paper for labels is used, when the remaining amount of the recording paper is sufficient, the detector of the remaining paper amount detecting means adheres to the side surface of the sticky roll-shaped recording paper. As a result, there is a possibility that a trouble may occur in the conveyance of the recording paper.

  An object of the present invention is to provide a printer capable of printing on a recording paper satisfactorily without a problem in conveying the recording paper.

A printer of the present invention that can solve the above-described problems has a recording paper storage unit that stores roll-shaped recording paper, and the recording paper is wound around a side surface of a predetermined height from the bottom surface of the recording paper storage unit. A printer including a remaining amount detection unit including a detection lever arranged in a state of protruding into the recording paper storage unit so as to be inserted into a core unit,
The detection lever is configured to be movable to a retracted position that does not protrude into the recording paper storage unit.

According to the printer of this configuration, when using a recording paper for a label in which a sticker paper coated with an adhesive on the back side is attached to a release paper, the detection lever of the remaining amount detection unit (near-end detection unit) is By disposing at the retracted position, it is possible to prevent the remaining amount detection (near end detection) of the recording paper from being performed by the remaining amount detection unit. Accordingly, it is possible to prevent a conveyance failure that may occur due to the adhesive of the recording paper adhering to the detection lever.
When using recording paper for labels, because the label is expensive and you want to use up to the end, you do not have to wait for the customer to replace the recording paper like a receipt, so the remaining amount of recording paper is reduced during use However, it is often printed until the label runs out. Therefore, in this case, the detection lever may be retracted so that the remaining amount is not detected. Misdetection of the remaining amount due to the detection lever adhering to the side surface of the recording paper can also be prevented.

In addition, the printer of the present invention has a structure that can be used in two postures of horizontal placement in which the bottom surface of the recording paper storage unit is horizontal and vertical installation in which the bottom surface of the recording paper storage unit is vertical.
A first remaining amount detection projecting into the recording paper storage portion so as to be insertable into the winding core portion on the side surface at a predetermined height from the lower surface of the recording paper storage portion in both the vertical and horizontal positions. A near-end detection unit including a detection lever configured to be switchable to a position and a second remaining amount detection position;
It is preferable that the detection lever be configured to be movable to the retracted position different from both the first remaining amount detection position and the second remaining amount detection position.

  According to the printer having this configuration, when using a label recording paper in which a label having an adhesive applied to the back surface is attached to a release paper, the first remaining amount detection position (first near-end detection position) is used. ) And the second remaining amount detection position (second near-end detection position) by disposing the detection lever of the remaining amount detection unit (near-end detection unit) at a retracted position different from that of the second remaining amount detection position (second near-end detection position). It is possible to prevent the remaining amount from being detected. Accordingly, it is possible to prevent a conveyance failure that may occur due to the adhesive of the recording paper adhering to the detection lever.

  In the printer according to the aspect of the invention, it is preferable that an engagement portion for preventing the detection lever from protruding into the recording paper storage portion is disposed at the retracted position.

  According to the printer having this configuration, when the remaining amount detection of the recording paper by the remaining amount detection unit is stopped, the remaining amount detection unit can be reliably maintained in the state of being disposed at the retracted position.

  In the printer of the present invention, it is preferable that a detection lever position confirmation unit that can confirm from the outside which position the detection lever is disposed is provided.

  According to the printer having this configuration, the position of the detection lever can be easily confirmed by the detection lever position confirmation means. As a result, the detection lever can be arranged at an accurate position according to the recording paper.

1 is a perspective view showing a printer according to an embodiment of the present invention. FIG. 2 is a perspective view of a state where a cover of the printer of FIG. 1 is opened. It is a perspective view which shows the structure of the printer mechanism of FIG. It is sectional drawing which shows the structure of the printer mechanism of FIG. It is a front view which shows the structure of a residual amount detection part. It is an enlarged front view which shows the fixed part to the main body frame of a residual amount detection part. It is a side view which shows the structure of a residual amount detection part. It is a side view of the main body frame showing a state in which the remaining amount detection unit is attached to the main body frame, (a) shows a case where the printer is installed with the bottom surface of the main body frame and its inclined part facing down, and (b) shows the main body frame. The case where the printer is installed with the back of the frame facing down is shown. It is explanatory drawing which shows operation | movement of a remaining amount detection part, (a) shows the state in which a remaining amount detection part is OFF, (b) shows the state in which a remaining amount detection part is ON. It is a side view of the main body frame which shows the remaining amount detection part arrange | positioned in the retracted position. It is sectional drawing of the main body frame which shows the residual amount detection part arrange | positioned in the retracted position.

Hereinafter, an example of an embodiment of a printer according to the present invention will be described with reference to the drawings.
FIG. 1 is a perspective view of a printer as an example of an embodiment according to the present invention, FIG. 2 is a perspective view with a cover of the printer opened, FIG. 3 is a perspective view showing the structure of the printer mechanism, and FIG. It is sectional drawing which shows a structure.

  As shown in FIGS. 1 to 4, the printer 1 performs printing on a roll-shaped recording sheet S, which is an example of a recording medium, using a thermal head 2, for example, a POS system or the like. It is a receipt printer used for the printer. In addition, the printer 1 can be used in a state where the bottom surface 28 of the main body frame 13 is in a horizontal orientation in a substantially horizontal direction and the bottom surface 28 of the main body frame 13 is in a vertical orientation in a substantially vertical direction. .

In the printer 1, the printer mechanism 3 is covered with a case body 4 made of resin, and the recording paper S can be stored in a roll paper storage unit (recording paper storage unit) 5 provided in the printer mechanism 3. Yes.
The upper part of the case body 4 is covered with an upper cover 6 and a front cover 7, and the upper cover 6 is attached to a cover frame 10 constituting the printer mechanism 3, and rotates around a horizontal axis on the rear side of the printer 1. It is possible to move. Then, by rotating the upper cover 6, the roll paper storage unit 5 is opened and closed.
A paper discharge port 8 is provided between the upper cover 6 and the front cover 7, and the printed recording paper S is discharged from the paper discharge port 8.

  An open button 9 is provided on one side of the upper portion of the printer 1, and a lock mechanism (not shown) that locks the cover frame 10 to which the upper cover 6 is attached when the open button 9 is pressed. The lock by is released, and the upper cover 6 can be opened to expose the roll paper storage unit 5. In addition, an indicator unit 12 having a display lamp such as an LED for displaying an operation status or the like is provided on one side of the upper portion of the printer 1.

  The printer mechanism 3 includes a main body frame 13, and the cover frame 10 is rotatably connected to the main body frame 13. An auto cutter 11 for cutting the recording paper S is provided on the front side of the main body frame 13 and is covered with a front cover 7.

  A platen roller 18 facing the thermal head 2 with the upper cover 6 closed is provided at the tip of the cover frame 10, and this platen roller 18 is rotated by a drive mechanism (not shown). When the platen roller 18 rotates, the recording paper S is nipped between the platen roller 18 and the thermal head 2 and fed, and is discharged from the paper discharge port 8.

The auto cutter 11 includes a fixed blade 33 provided at the front end of the cover frame 22 and a movable blade 34 provided on the main body frame 21 side. The direction is arranged along the width direction of the printer 1. The movable blade 34 is moved by the drive mechanism 35 between a standby position with a predetermined gap between the movable blade 34 and the fixed blade 33 and a cutting end position overlapping the fixed blade 33.
The recording sheet S that has passed the print processing position by the thermal head 2 is cut by the fixed blade 33 and the movable blade 34 by moving the movable blade 34 from the standby position to the cutting end position.

  Inside the cover frame 10, a resin roll paper holder 17 that forms the lower side of the roll paper storage unit 5 is provided. The roll paper holder 17 is provided with slit grooves 27 that engage with the left and right side plates of the main body frame 13. When the slit grooves 27 engage with the convex portions on the left and right side portions of the main body frame 13, the roll paper holder Since the width direction of 17 is regulated, an appropriate width is maintained inside the roll paper storage unit 5 with respect to the recording paper S.

  Further, on the left side surface of the main body frame 13, a near-end detection unit 24 (remaining amount detection unit) for detecting that the remaining amount of the recording paper S has decreased is centered on a bolt 25 that is a support shaft. It is pivotally attached. This is to change the near-end detector 24 to the optimum position in accordance with the change in the installation angle of the printer 1. For example, as shown in FIG. 3, when installing the main body frame 13 with the bottom surface 28 facing down, the detection lever 63 of the near-end detection unit 24 is fixed at a position facing the hole 32 a provided in the main body frame 13. On the other hand, when installing with the back surface 29 of the main body frame 13 facing down, the detection lever 63 is fixed at a position facing the hole 32b.

  Here, FIG. 4 shows a state in which the recording sheet S immediately after being replaced or a recording sheet S having a large outer diameter at the initial use is accommodated, and is fed to the recording sheet S. As the outer diameter decreases, the recording sheet S falls into the guide portion 38. Then, the near-end detection unit 24 described above detects that the outer diameter of the recording paper S has become a small diameter to be detected. That is, the remaining length can be determined by detecting the predetermined outer diameter of the recording paper S.

  An inclined portion 28 a for installing the printer 1 slightly tilted is provided on the rear side of the bottom surface 28 of the main body frame 13. In addition, a guide portion 60 for holding the recording paper S when the printer 1 is installed with the back surface 29 of the main body frame 13 down is provided at the rear portion of the main body frame 13.

Next, the structure of the near end detection unit 24 will be described.
5 to 7 show the near-end detection unit 24 in the present embodiment, FIG. 5 is a front view, FIG. 6 is an enlarged front view of a portion fixed to the main body frame, and FIG. 7 is a side view.
As shown in FIG. 5, the near-end detector 24 of the present embodiment is generally composed of a detection frame 62 and a detection lever 63, both of which are long members. The detection frame 62 and the detection lever 63 are both made of a resin material such as acrylonitrile / butadiene / styrene copolymer (ABS) or polyacetal (POM). Two support shafts 63a and 63b are provided symmetrically at the base end portion of the detection lever 63, and the detection lever 63 rotates around the detection frame 62 around these support shafts 63a and 63b as shown in FIG. It is locked freely.

  A detection element 64 that abuts against the side end surface of the recording paper S is provided at the front end of the detection lever 63. The detector 64 is made of, for example, a resin material, but may be formed integrally with the detection lever 63. The detector 64 is formed so as to extend in a direction orthogonal to the longitudinal direction of the detection lever 63. The detector 64 is formed to have a taper so that it can easily enter the space 76 of the core 75 of the recording paper S.

Further, as shown in FIG. 7, a protrusion 65 is provided at the center portion of the detection lever 63. The protrusion 65 is made of, for example, a resin plate-like member, and is formed so as to extend in a direction orthogonal to the longitudinal direction of the detection lever 63 like the detector 64. In this case, the length of the protrusion 65 is slightly shorter than the length of the detector 64. The protrusion 65 can also be formed integrally with the detection lever 63.
Further, an inclined surface 65a is formed on the side of the projection 65 facing the detector 64, that is, on the radially outer side of the recording paper S, and the tip portion of the projection 65 is formed so as to become gradually narrower toward the front. ing.

  On the other hand, as shown in FIGS. 5 and 7, the detection frame 62 is formed with a window portion 62 a for allowing the protrusion 65 of the detection lever 63 to escape. In addition, a support portion 66 is formed substantially at the center of the detection frame 62, and a limit switch 67 is provided on the support portion 66. The limit switch 67 is turned on and off by the rotation of the detection lever 63. In the present embodiment, the detection lever 63 is configured to be pressed against the detection frame 62 by the pressing force of the switch pin 68 by the spring in the limit switch 67. Instead of the spring in the limit switch 67, another urging member may be provided.

  As shown in FIG. 5, a grip 69 for rotating the near-end detector 24 is integrally formed at the end of the detection frame 62 on the side where the detection lever 63 is not provided. The grip portion 69 is configured by forming three convex portions (detection lever position confirmation means) 69a to 69c on a plate-like base portion.

  As shown in FIGS. 5 and 8, a long hole 72 for passing the bolt 25 as a support shaft is formed in the vicinity of the center of curvature of the three convex portions 69a to 69c. The bulging part 73 is formed so that a center part may become narrow. Around the periphery, an annular rib 71 is formed so that the nut 70 cannot be rotated.

  In the present embodiment, the detection frame 62 is made of resin, and the metal bolt 25 is configured such that its head directly contacts the main body frame 13. Therefore, since the bolt 25 is electrically connected to the main body frame 13, static electricity is not charged to the bolt 25, and the limit switch 67 of the near-end detection unit 24 is prevented from malfunction due to static electricity. The head of the bolt 25 is disposed on the roll paper storage unit 5 side and can be operated from the roll paper storage unit 5 side.

  FIG. 8 shows a state in which the near-end detection unit 24 according to the present embodiment is attached to the main body frame 13, and FIG. 8A shows the printer with the bottom surface 28 of the main body frame 13 and the inclined portion 28a facing down. FIG. 8B shows a case where the printer 1 is installed with the back surface 29 of the main body frame 13 facing down.

  As described above, the near-end detection unit 24 is rotatably attached to the main body frame 13 around the bolt 25 that is a support shaft, and the detector 64 of the detection lever 63 is provided with a hole 32a provided in the main body frame 13. It is configured to enter the hole 32b. That is, the hole 32a and the hole 32b are provided at a position equidistant from the support shaft. In this case, the hole 32a and the hole 32b are provided at an angle of, for example, 90 ° with the bolt 25 serving as a support shaft as a center.

  The holes 32a and 32b are provided in the vicinity of the guide portions 38 and 60 of the roll paper holder 17 described above. Therefore, the guide portion 38 and the guide portion 60 are also provided at an angle of 90 °, for example, with the bolt 25 serving as a support shaft as the center. On the other hand, the hole 32 a and the hole 32 b are each formed in a substantially elliptical shape flattened in the longitudinal direction of the near-end detection unit 24.

  Further, rectangular holes 74a and 74b for allowing the projection 65 of the detection lever 63 to pass are formed in the vicinity of the holes 32a and 32b. As shown in FIG. 3, the convex portions 69 a to 69 c of the grip portion 69 are inserted into slit-shaped guide holes 170 formed in the roll paper holder 17, and can be viewed with the upper cover 6 opened. Moreover, it can be held.

  On the other hand, on the left side surface of the main body frame 13, bent raised portions 80 to 83 that are engaging portions that engage with the near end detection portion 24 are formed toward the near end detection portion 24 side. These are in contact with both sides 62b and 62c formed in parallel of the detection frame 62, and determine the position of the near-end detection unit 24.

  Therefore, when the near-end detection unit 24 is disposed between the bent-up portions 80 and 81, the detector 64 of the detection lever 63 corresponds to the guide unit 38 that is held when the recording paper S has a small diameter. The position of the near-end detection unit 24 at this time is the first near-end detection position A1.

  When changing the installation angle of the printer 1, the bolt 25 is loosened from the roll paper storage unit 5 side so that the near-end detection unit 24 can be rotated, and the gripping unit 69 is pinched to rotate clockwise or counterclockwise. The near-end detection unit 24 is arranged between the bending raising portions 82 and 83 by rotating. The detector 64 of the detection lever 63 is inserted into the hole 32b corresponding to the guide part 60 held when the recording paper S has a small diameter, and the protrusion 65 is inserted into the hole 74b. The position of the near-end detection unit 24 at this time is the second near-end detection position A2.

  In addition, commercially available recording paper includes two types of cores having outer diameters of 18 mm and 22 mm. In the present embodiment, the types of recording paper cores can be supported. That is, when the outer diameter of the winding core is large, the near end detection unit 24 is moved to the bolt 25 so that the detector 64 of the detection lever 63 is separated from the bottom of the guide portion or when the outer diameter of the winding core is small. Adjust against.

  In the present embodiment, an adjustment long hole 72 for passing the bolt 25 is formed, and the long hole 72 is formed with a bulging portion 73 so that a substantially central portion thereof is constricted. The detection lever 63 can be moved to the optimum position with a click feeling.

FIG. 9 shows the operation of the near-end detection unit 24 in the present embodiment. FIG. 9A shows the case where the near-end detection unit 24 is off, and FIG. 9B shows the case where the near-end detection unit 24 is on. It shows the state.
As shown in FIG. 9A, in a state where the remaining amount of the recording paper S is large, the detector 64 or the protrusion 65 of the detection lever 63 abuts against the side surface of the recording paper S. The switch 67 is kept off.

  Here, the recording paper S is housed in the roll paper housing unit 5 so as to be swingable to some extent. However, even if the recording paper S is rocked in the roll paper housing unit 5, the detection is possible. Since either the detector 64 or the protrusion 65 of the lever 63 abuts against the side surface of the recording sheet S, the detection lever 63 is always pushed back, and the limit switch 67 is kept off.

  As shown in FIG. 9B, when the remaining amount of the recording paper S becomes very small, the recording paper S moves and the detector 64 of the detection lever 63 moves to the space 76 of the winding core 75. Since the limit switch 67 is turned on, the signal to that effect is transmitted to a main circuit board (not shown) that controls the printer connected by FFC or the like.

  Further, as shown in FIG. 10, bend raising portions 84 and 85 that are engaging portions that engage with the near end detection portion 24 are formed on the left side surface of the main body frame 13 toward the near end detection portion 24 side. . These are also in contact with both sides 62b and 62c formed in parallel with the detection frame 62 to determine the position of the near-end detection unit 24, similarly to the bent raised portions 80 to 83.

  Therefore, when the near-end detection unit 24 is disposed between the bent-up portions 84 and 85, the detector 64 of the detection lever 63 is disposed at a position facing the main body frame 13 without the holes 32a, 32b, 74a, and 74b. The position of the near-end detection unit 24 at this time is the retreat position B.

  The retracted position B is a position deviated from any detectable position of the first near-end detected position A1 and the second near-end detected position A2. At the retracted position B, as shown in FIG. The detector 64 and the projection 65 of the detection lever 63 of the detection unit 24 are opposed to the main body frame 13, and the projection of the detector 64 and the projection 65 of the detection lever 63 into the roll paper storage unit 5 is blocked. Become.

  In order to place the near-end detection unit 24 in the retracted position B, the bolt 25 is loosened so that the near-end detection unit 24 can be rotated, and the gripping unit 69 is pinched and rotated clockwise or counterclockwise. The bolts 25 may be tightened again by placing them between the bent raised portions 84 and 85.

  In addition, each of the convex portions 69a to 69c of the grip portion 69 is provided with a display that can be viewed by the user with the upper cover 6 opened. Specifically, the convex portions 69a and 69c indicate the first near-end detection position A1 or the second near-end detection position A2 that can be detected by the near-end detection unit 24, for example, “A1”. , “A2” is marked, and the convex portion 69b is marked with, for example, a mark “B” indicating the retreat position B where the near-end detection by the near-end detection unit 24 is not performed. Yes.

  Here, when a printing process is performed on a label by the printer 1, a label recording sheet S in which a label having an adhesive applied to the back side is attached to a release sheet is used. The side surface wound in the shape of a roll also has adhesiveness, and has adhesiveness.

  For this reason, when such a recording paper S for labels is used, if the near-end detector 24 is arranged at the detectable positions A1 and A2, the detector 64 and the protrusion 65 of the detection lever 63 of the near-end detector 24 are provided. Adheres to the side surface of the recording sheet S having adhesiveness, and a fault occurs in the erroneous detection by the near-end detection unit 24 and the conveyance of the recording sheet S. In addition, when the normal recording paper S is printed after that, the detector 64 and the protrusion 65 to which the adhesive is attached adheres to the recording paper S, and erroneous detection by the near-end detection unit 24 and conveyance of the recording paper S are performed. There is also a risk of causing defects.

  Therefore, when printing on the recording paper S for labels, the near-end detection unit 24 is disposed at the retreat position B while confirming the convex portions 69a to 69c of the gripping unit 69, and the recording paper S by the near-end detection unit 24 is recorded. Do not perform near-end detection. Accordingly, erroneous detection and conveyance failure during printing on the label recording paper S and subsequent printing on the normal recording paper S can be prevented.

  As described above, according to the printer 1 according to the above-described embodiment, for example, when using the recording sheet S for a label in which a sticker paper coated with an adhesive on the back side is attached to a release paper, the first By disposing the detection lever 63 of the near-end detection unit 24 at a retracted position B different from both the near-end detection position A1 and the second near-end detection position A2, the near-end detection of the recording paper S by the near-end detection unit 24 is not performed. Can be. Accordingly, it is possible to prevent erroneous detection and conveyance failure that may occur due to the adhesive of the recording paper S adhering to the detection lever 63, and it is possible to print on the recording paper S satisfactorily. Further, it is possible to cope with the case where the near-end detection of the recording paper S is unnecessary.

  Further, when the near-end detection unit 24 is fixed by being engaged with an engagement portion composed of the bent-up portions 84 and 85, the near-end detection unit 24 is stopped when the near-end detection of the recording paper S by the near-end detection unit 24 is stopped. It can be reliably maintained in the state of being placed at the retracted position B.

  In addition, since each of the convex portions 69a to 69c of the grip portion 69 that can be viewed from the outside with the upper cover 6 opened is used as a position confirmation means of the detection lever 63 of the near-end detection portion 24 by giving a display. The position of the detection lever 63 can be easily confirmed from the convex portions 69a to 69c of the grip portion 69. As a result, the detection lever 63 can be arranged at an appropriate position according to the recording paper S.

In addition, as a display attached | subjected to each convex part 69a-69c of the holding part 69, not only a character but a symbol may be sufficient. Moreover, you may distinguish each convex part 69a-69c by color-coding.
In the above embodiment, the thermal printer that performs printing with the thermal head has been described as an example. However, as the printer, an inkjet printer that performs printing by ejecting ink droplets from the head, a thermal transfer printer, an impact dot printer, or the like may be used. good.
In the above-described example, the detection lever 63 and the limit switch 67 are used for the near-end detection unit 24. However, as an alternative, the detection lever 63 includes an optical sensor and detects the space 76 of the core portion 75 of the recording paper S. You may make it do.

  1: printer, 5: roll paper storage unit (recording paper storage unit), 24: near-end detection unit, 63: detection lever, 69a to 69c: convex portion (detection lever position confirmation means), 75: winding core unit, 84, 85: Bending portion (engaging portion), A1: first near-end detection position, A2: second near-end detection position, B: retracted position, S: recording paper

Claims (4)

It has a recording paper storage unit for storing roll-shaped recording paper, and protrudes from the bottom surface of the recording paper storage unit into a side of a predetermined height so that it can be inserted into the core of the recording paper so as to be inserted into the recording paper storage unit. A printer having a remaining amount detection unit including a detection lever arranged in a state,
A printer having a structure in which the detection lever can be moved to a retracted position so as not to protrude into the recording paper container. The printer according to claim 1,
The printer has a structure that can be used in two orientations, a horizontal placement in which the bottom surface of the recording paper storage portion is in a horizontal direction and a vertical placement in which the bottom surface of the recording paper storage portion is in a vertical direction,
A first remaining amount detection projecting into the recording paper storage portion so as to be insertable into the winding core portion on the side surface at a predetermined height from the lower surface of the recording paper storage portion in both the vertical and horizontal positions. A remaining amount detection unit including a detection lever configured to be switchable to a position and a second remaining amount detection position;
A printer having a structure capable of moving the detection lever to the retracted position different from any of the first remaining amount detecting position and the second remaining amount detecting position. The printer according to claim 1 or 2,
The printer according to claim 1, wherein an engagement portion for preventing the detection lever from protruding into the recording paper storage portion is disposed at the retracted position. The printer according to any one of claims 1 to 3,
A printer comprising detection lever position confirmation means for confirming from which position the detection lever is disposed from the outside.

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