Printer

Abstract

To provide a printer capable of performing high-quality printing.SOLUTION: A printer includes a body, a cover, a conveyance part, a printing part, a pressing member, a link arm, and a regulation member. The body includes a storage part storing a roll obtained by rolling a long printing medium into a roll state. The cover opens and closes the storage part. The conveyance part draws the printing medium from the roll and sends the printing medium to the outside of the body. The printing part prints information onto the printing medium drawn from the roll by the conveyance part. The pressing member is attached to the cover via a first rotation shaft so as to be rotatable and presses the roll against an inner surface of the storage part. The link arm is attached to the body via a second rotation shaft parallel to the first rotation shaft so as to be rotatable and has a slider inserted and arranged into a long hole of the pressing member so as to be slidable. The regulation member is attached to the slider and regulates movement of the roll in a drawing direction of the printing medium.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] An embodiment of the present invention relates to a printer that prints information on a long print medium wound in a roll, for example. [Background technology]

[0002] For example, the labels affixed to food packaging in supermarkets have an adhesive applied to the opposite side to the printed side, and are distributed in rolls with the labels lined up and affixed to long strips of release paper. There are also environmentally friendly label rolls available, in which the printed side of long, linerless labels without release paper is treated with a release agent and rolled up.

[0003] Some printers that print information on linerless labels without release paper use a drop-in system that allows label rolls to be loaded simply by opening the cover and dropping the label into the hopper on the main body, making label roll replacement easier.

[0004] Drop-in printers do not have a shaft to rotatably support the label roll, so the label roll tends to move around inside the hopper when the linerless labels are pulled out of the roll. To prevent this movement, some printers are equipped with a flapper that presses the label roll against the inner wall of the hopper. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Publication No. 2022-135695 Summary of the Invention [Problem to be solved by the invention]

[0006] When a label roll of linerless labels is loaded into the conventional printer described above, gravity will cause the label roll to sit at the bottom of the hopper if the roll diameter is large, but as the roll diameter becomes smaller and lighter, the label roll will tend to move in the direction in which the linerless labels are pulled out. For example, if a label roll wrapped around linerless labels coated with a weak adhesive that allows them to be removably attached to the surface to which they are attached is loaded, after the pulling of the linerless labels stops, the label roll will fall to the bottom of the hopper while rotating under its own weight.

[0007] When the label roll moves inside the hopper in this way, it hits the bottom of the hopper or the inside of the cover, causing the printer to vibrate. This can cause the print head to vibrate or the linerless label to be misaligned, resulting in poor printing.

[0008] The problem to be solved by the present invention is to provide a printer capable of producing high-quality prints. [Means for solving the problem]

[0009] The printer of this embodiment has a main body, a cover, a transport unit, a printing unit, a pressing member, a link arm, and a regulating member. The main body has a storage unit that stores a roll of long print media wound in a roll shape. The cover opens and closes the storage unit. The transport unit pulls the print media from the roll and sends it out of the main body. The printing unit prints information on the print media pulled from the roll by the transport unit. The pressing member is rotatably attached to the cover via a first rotation shaft and presses the roll against the inner surface of the storage unit. The link arm is rotatably attached to the main body via a second rotation shaft parallel to the first rotation shaft and includes a slider that is slidably inserted into an elongated hole in the pressing member. The regulating member is attached to the slider and regulates movement of the roll in the direction in which the print media is pulled out. [Brief explanation of the drawings]

[0010] [Figure 1]FIG. 1 is a cross-sectional view showing a printer according to an embodiment. [Figure 2] FIG. 2 is a cross-sectional view showing the printer of FIG. 1 with the cover open. [Figure 3] FIG. 3 is a perspective view showing the configuration of the cover side of the printer in FIG. 2 and the paper guide on the main body side. [Figure 4] FIG. 4 is a perspective view of the main part of FIG. 3 as seen from the cover side. [Figure 5] FIG. 5 is a partial enlarged view for explaining the link mechanism of FIG. [Figure 6] FIG. 6 is a cross-sectional view showing an example of a state in which the diameter of the label roll inserted into the printer of FIG. 1 has become smaller. [Figure 7] FIG. 7 is a cross-sectional view showing a state in which the label roll of FIG. 6 has moved in the label pull-out direction. [Figure 8] FIG. 8 is a cross-sectional view showing a state in which the label roll of FIG. 6 has moved to the bottom of the hopper. [Figure 9] FIG. 9 is a cross-sectional view showing a state in which the label roll in FIG. 8 has become smaller and has exceeded the tip of the flapper. [Figure 10] FIG. 10 is a perspective view showing the main part of a printer according to a modified example. DETAILED DESCRIPTION OF THE INVENTION

[0011] Hereinafter, an embodiment and its modifications will be described with reference to the drawings. In the embodiment and its modifications, the same components are denoted by the same reference numerals, and redundant description will be omitted.

[0012] As shown in Figure 1, a printer 100 according to one embodiment includes a main body 10 having a hopper 2 therein capable of accommodating a label roll R, and a cover 20 that opens and closes the hopper 2. The hopper 2 is an example of a storage unit that rotatably accommodates the label roll R. The printer 100 has a conveyance path T that connects the hopper 2 between the main body 10 and the cover 20. The printer 100 has an outlet 1 at the downstream end of the conveyance path T, spaced apart from the hopper 2, for discharging labels.

[0013] The label roll R is an example of a roll that can be fed into the printer 100, and is a long, strip-shaped linerless label L without release paper wound into a roll. The linerless label L is an example of a print medium, and has a printing surface that forms the outside of the roll. An adhesive is provided on the surface opposite the printing surface. The printing surface is treated with a release treatment for the adhesive. The adhesive may be weaker to create a removable linerless label. The label roll R is not limited to one wound with linerless labels L, but may also be one in which multiple labels are lined up and attached to a long piece of release paper.

[0014] The label roll R is loaded into the hopper 2 in the orientation shown in Figure 1. Therefore, when the linerless label L is pulled out from the label roll R, the label roll R rotates counterclockwise in Figure 1. The printer 100 has a cutter 9 near the discharge outlet 1, which divides the linerless label L into multiple labels and discharges them through the discharge outlet 1.

[0015] The printer 100 can be used in the vertically placed position shown in Fig. 1. With the printer 100 placed in this position, the left side of the hopper 2 of the main body 10 is open in the figure, and the cover 20 is located on the left side in the figure, covering the open side of the hopper 2. Therefore, when the cover 20 of the vertically placed printer 100 is rotated around a rotation shaft 21 (described later) to the open position shown in Fig. 2, the left side of the hopper 2 in the figure opens wide, and the cover 20 assumes a position approximately parallel to the surface on which the printer 100 is placed.

[0016] In the following description, when the printer 100 is installed vertically as shown in Fig. 1, the open side of the hopper 2, i.e., the side of the cover 20 placed in the closed position, is referred to as the front, and the front-to-back, up-down, and left-to-right directions are defined when the printer 100 is viewed from the front. In each figure, the direction from left to right is indicated by arrow X, the direction from back to front is indicated by arrow Y, and the direction from bottom to top is indicated by arrow Z.

[0017] The printer 100 can also be used in a horizontal position (not shown). In this case, the rear surface 11 of the main body 10 is in contact with the installation surface, and the front surface of the cover 20 faces upward. When the printer 100 is placed horizontally, the direction of gravity acting on the label roll R and each component of the printer 100 is 90 degrees different from when the printer is placed vertically, but the printer 100 operates without any problems, just like when it is placed vertically. Therefore, the following description will be based on the case where the printer 100 is placed vertically.

[0018] When loading the label roll R into the printer 100, the cover 20 is opened to the open position, which opens the hopper 2, as shown in Figure 2, and the label roll R is inserted in a predetermined orientation from the front of the hopper 2. Then, the linerless label L is pulled out from the label roll R and led out of the hopper 2 to the main body 10, and the cover 20 is rotated to the closed position, which closes the hopper 2. This leaves the leading edge of the linerless label L led out of the discharge outlet 1, as shown in Figure 1, and printing on the linerless label L becomes possible.

[0019] The printer 100 of this embodiment employs a so-called drop-in method in which the label roll R is loaded into the main body 10 simply by inserting the label roll R into the hopper 2. Therefore, there is no shaft in the hopper 2 that rotatably supports the label roll R, and the label roll R is movable within the hopper 2.

[0020] The printer 100 has a print head 4 that functions as a printing unit that prints information on linerless labels L, located on the main body 10 side of the transport path T near the discharge outlet 1. The printer 100 has a platen roller 6 that rotates while pressing the linerless labels L against the print head 4, located on the cover 20 side facing the print head 4 across the transport path T. The platen roller 6 is driven by a motor (not shown) connected via a drive transmission mechanism (not shown). The platen roller 6 is a component attached to the cover 20, and functions as a transport unit that pulls out the linerless labels L from the label roll R and sends them out through the discharge outlet 1.

[0021] As shown in FIG. 3 , the cover 20 is integrally provided with two pivot shafts 21 extending in the left-right direction. The cover 20 is also provided with a pair of left and right protrusions 22 integrally protruding rearward from near the bottom end of the cover 20 in the figure. For example, the right protrusion 22 is plate-shaped and substantially parallel to the YZ plane, with the pivot shaft 21 protruding rightward from its right side surface. The left protrusion 22 is shaped symmetrically to the right protrusion 22 and includes the pivot shaft 21 integrally protruding leftward from its left side surface. The two pivot shafts 21 are coaxially arranged. Only the right pivot shaft 21 is shown in FIG. 3 ; the left pivot shaft 21 is not visible. These two pivot shafts 21 function as a third pivot shaft that pivotally connects the bottom end 201 of the cover 20 to the main body 10. The cover 20 is rotatable about the two pivot shafts 21 relative to the main body 10 between the closed position shown in FIG. 1 and the open position shown in FIG. 2 . The main body 10 has bearings (not shown) that rotatably receive the two rotation shafts 21 of the cover 20 .

[0022] The main body 10 includes a paper guide 12 located below the hopper 2. The paper guide 12 is attached to the main body 10 by two fixed claws 13, 14 protruding from the rear of the paper guide 12. The main body 10 has a flat bottom surface 15 that contacts the installation surface S when the printer 100 is placed upright. The bottom surface of the paper guide 12 on the hopper 2 side forms part of the inner surface of the hopper 2. The paper guide 12 has a bearing hole 16 (Fig. 4) near its front end for rotatably receiving a rotation shaft 33 of a link arm 34 (described later).

[0023] As shown in FIGS. 3 and 4, the printer 100 has a flapper 32 attached to the cover 20, a link arm 34 attached to the paper guide 12 of the main body 10, and a retaining arm 36. The printer 100 has a pivot shaft 31 that pivots the base end (upper end in the figure) of the flapper 32 relative to the cover 20. The printer 100 has the pivot shaft 33 that pivots the base end (lower end in the figure) of the link arm 34 relative to the main body 10. The flapper 32 has an elongated hole 321 in its longitudinal middle away from the pivot shaft 31 that slidably receives the slide shaft 30. The link arm 34 has the slide shaft 30 inserted through the elongated hole 321 at its tip (upper end in the figure) of its rotation opposite the pivot shaft 33. The retaining arm 36 is attached to the slide shaft 30 so that it can freely rotate.

[0024] The rotation shaft 31 of the flapper 32 extends in the left-right direction and functions as a first rotation shaft. A coil spring (not shown) is attached to the rotation shaft 31, which urges the flapper 32 counterclockwise in FIG. 3. The flapper 32 functions as a pressing member that presses the label roll R against the inner surface of the hopper 2 by rotating counterclockwise in FIG. 3. The rotation shaft 33 of the link arm 34 extends parallel to the rotation shaft 31 and functions as a second rotation shaft. The slide shaft 30 extends parallel to the rotation shafts 31 and 33 and functions as a slider that is inserted into the elongated hole 321 of the flapper 32. The retaining arm 36 attached to the slide shaft 30 functions as a restricting member that restricts the movement of the label roll R in the direction in which the linerless labels L are pulled out.

[0025] The flapper 32 has two parallel legs 322, 323 spaced apart from each other in the left-right direction. The base ends of the two legs 322, 323 for rotation each have a bearing hole 325 that rotatably receives the rotation shaft 31. In Fig. 3, only the bearing hole 325 of the right leg 323 is shown, and the bearing hole 325 of the left leg 323 is not shown. These two bearing holes 325 are arranged coaxially and spaced apart from each other in the left-right direction, as shown in Fig. 4.

[0026] The two legs 322, 323 each have an elongated hole 321 through which the slide shaft 30 passes. The two elongated holes 321 have symmetrical shapes. The two elongated holes 321 are located along the longitudinal direction of the flapper 32, spaced apart from the bearing hole 325 toward the tip of the rotation. The two elongated holes 321 extend in the longitudinal direction of the flapper 32.

[0027] The flapper 32 has a substantially rectangular opening 324 between the two legs 322, 323 at a position spaced apart from the bearing hole 325. The opening 324 is located opposite each other on the left and right between the two elongated holes 321. The holding arm 36 is attached to the slide shaft 30 via the opening 324 of the flapper 32. The flapper 32 has a locking portion 326 against which a part of the holding arm 36 abuts on the edge of the opening 324 on the side farther from the bearing hole 325, preventing the holding arm 36 from rotating further.

[0028] The flapper 32 has a substantially rectangular pressing plate portion 328 with a flat pressing surface 327 in the shape of a rectangular frame that comes into contact with the label roll R at the tip end of its rotation. The pressing surface 327 of the pressing plate portion 328 is a flat surface that faces the hopper 2 of the main body 10. The flapper 32 rotates counterclockwise in FIG. 3 by the biasing force of a coil spring provided on the rotating shaft 31, and presses the pressing surface 327 of the pressing plate portion 328 against the outer peripheral surface of the label roll R stored in the hopper 2. As a result, the outer peripheral surface of the opposite side of the label roll R is pressed against the inner surface of the hopper 2 on the side opposite the flapper 32, thereby suppressing flapping of the label roll R.

[0029] The link arm 34 integrally includes a left frame 341, a right frame 342, a connecting frame 343, and an intermediate frame 344. The left frame 341 and the right frame 342 have symmetrical shapes, are spaced apart from each other, and are parallel to each other. The connecting frame 343 extends in the left-right direction and connects the base end of the rotation of the left frame 341 to the base end of the rotation of the right frame 342. The intermediate frame 344 extends parallel to and spaced apart from the connecting frame 343, and integrally connects the middle portion of the left frame 341 to the middle portion of the right frame 342.

[0030] The left frame 341 and the right frame 342 each have a bearing hole 345 at their respective rotational ends separated from the connecting frame 343 to rotatably receive the slide shaft 30. The two bearing holes 345 are arranged coaxially. The left rotation shaft 33 of the link arm 34 protrudes leftward from the left side surface of the left frame 341 near its base end. The right rotation shaft 33 of the link arm 34 protrudes rightward from the right side surface of the right frame 342 near its base end.

[0031] A link mechanism is formed by inserting the slide shaft 30 through two elongated holes 321 in the flapper 32 and two bearing holes 345 in the link arm 34. The flapper 32 is biased in the counterclockwise direction in FIG. 3 by a coil spring provided on the rotating shaft 31, and this biasing force is transmitted to the link arm 34 via the slide shaft 30 and the elongated holes 321. The link mechanism limits the swing range of the flapper 32.

[0032] The pressure arm 36 is formed in the shape of a substantially rectangular plate that is slightly curved along the outer periphery of the label roll R, and has a connecting portion 361 integral with its base end for rotation that is rotatably connected to the slide shaft 30. The connecting portion 361 has a structure that allows it to be connected to the slide shaft 30 from the pressing surface 327 side of the flapper 32 through the opening 324 of the flapper 32. The pressure arm 36 is freely rotatable relative to the slide shaft 30. The inside of the curve of the pressure arm 36 faces the pressing surface 327 of the pressing plate portion 328 of the flapper 32. Figure 3 shows a state in which the clockwise rotation of the pressure arm 36 due to its own weight has been stopped by the locking portion 326 of the flapper 32.

[0033] 5, the pivot shaft 21 protruding outward from the protrusion 22 near the bottom end of the cover 20 is positioned slightly above the pivot shaft 33 of the link arm 34 that is inserted into the bearing hole 16 provided near the front end of the paper guide 12 of the main body 10. In addition, the lower end 346 of the link arm 34, on the opposite side of the slide shaft 30 with respect to the pivot shaft 33, has a pressed surface 347 that faces closely to the inner surface 202 of the lower end 201 of the cover 20, which is spaced apart from the pivot shaft 21. The lower end 346 of the link arm 34 functions as a protruding portion that is pressed by the inner surface 202 of the cover 20, and the inner surface 202 near the lower end 201 of the cover 20 functions as a pressing portion that presses the pressed surface 347 of the lower end 346 of the link arm 34.

[0034] When the cover 20, which is disposed in the closed position shown in Fig. 1, is rotated counterclockwise around the rotation shaft 21 toward the open position shown in Fig. 2, the lower end 201 of the cover 20 rotates counterclockwise in Fig. 5 around the rotation shaft 21, and the inner surface 202 near the lower end 201 of the cover 20 presses the pressed surface 347 of the lower end 346 of the link arm 34. As a result, the link arm 34 rotates counterclockwise around the rotation shaft 33 against the biasing force of the coil spring provided on the rotation shaft 31 of the flapper 32, and is stored in a state approaching the inner surface of the cover 20 as shown in Fig. 2. At this time, the link mechanism causes the flapper 32 to rotate clockwise around the rotation shaft 31 and be stored inside the cover 20, making it easier to feed the label roll R into the hopper 2.

[0035] When cover 20 is rotated clockwise about rotation shaft 21 from the open position shown in Fig. 2 to the closed position shown in Fig. 1, lower end 201 of cover 20 rotates clockwise about rotation shaft 21 away from pressed surface 347 of link arm 34, and the biasing force of the coil spring causes flapper 32 to rotate counterclockwise about rotation shaft 31. At this time, link arm 34 rotates clockwise about rotation shaft 33. This state is shown in Fig. 3.

[0036] After opening the cover 20 and placing an unused label roll R into the hopper 2, when the cover 20 is closed to the closed position shown in Fig. 1, the flapper 32 is urged counterclockwise by the coil spring, and the pressing surface 327 of the flapper 32 is pressed against the outer peripheral surface of the label roll R. In this state, the pressing arm 36 attached to the slide shaft 30 comes into contact with the outer peripheral surface of the label roll R due to its own weight. Immediately after the unused label roll R is placed into the hopper 2, the outer peripheral surface of the label roll R is in contact with the multiple guide rolls 23 provided on the inner surface of the hopper 2.

[0037] For this reason, even when the linerless labels L are pulled out from the label roll R by the rotation of the platen roller 6 and the label roll R rotates, the label roll R is less likely to move around inside the hopper 2. In other words, the label roll R is clamped between the pressing surface 327 of the flapper 32 and the inner surface on the opposite side of the hopper 2 (in this case, the outer peripheral surface of the guide roll 23), which makes it possible to prevent the label roll R from moving around inside the hopper 2.

[0038] Furthermore, because the pressure arm 36 is in contact with the outer peripheral surface of the label roll R due to its own weight, even if the label roll R moves in the unwinding direction of the linerless labels L as the linerless labels L are unwound, the outer peripheral surface of the label roll R is prevented from colliding with the cover 20 or the main body 10. In this way, by preventing collisions of the label roll R with the pressure arm 36, undesired vibrations that occur inside the printer 100 due to collisions can be suppressed, preventing problems such as vibrations being transmitted to the print head 4. This prevents the print head 4 from vibrating, and prevents misalignment of the linerless labels L as they are fed, enabling high-quality printing.

[0039] When the diameter of the label roll R is reduced by pulling out the linerless labels L, for example, to the extent shown in Fig. 6, the label roll R can move to the position shown in Fig. 7 in the direction in which the linerless labels L are pulled out, or to the position shown in Fig. 8 in which the label roll R has moved to the bottom of the hopper 2. When a small-diameter label roll R is positioned in the intermediate position shown in Fig. 6, the flapper 32 presses the label roll R against the inner surface of the hopper 2 with the pressing surface 327, as in the case of an unused label roll R described above, and the pressing arm 36 comes into contact with the outer peripheral surface of the linerless labels L due to its own weight.

[0040] 7, when the label roll R is pulled up to the position shown in Fig. 7, the flapper 32 presses the label roll R against the inner surface of the hopper 2 with the pressing surface 327, and the retaining arm 36 restricts further upward movement of the label roll R, preventing the label roll R from colliding with components of the cover 20. This prevents vibrations caused by the label roll R colliding with the print head 4 or platen roller 6, enabling high-quality printing.

[0041] As the diameter of the label roll R further decreases as the linerless labels L are drawn out, the label roll R passes between the tip of the rotating flapper 32 and the bottom of the hopper 2, as shown in Figure 9. Once the label roll R has moved to this position, it remains in this position without passing the tip of the flapper 32 again. Therefore, the label roll R does not move upward until all the linerless labels L are used up, and does not collide with the components of the cover 20 or the frame of the main body 10. By positioning the pressure arm 36 in the path of the linerless labels L, the pressure arm 36 acts as a damper that reduces the load on the linerless labels L. Therefore, the label roll R does not move upward.

[0042] As described above, according to this embodiment, the label roll R placed in the hopper 2 is pressed against the inner surface of the hopper 2 by the flapper 32, which prevents the label roll R from moving around inside the hopper 2. Furthermore, the pressing arm 36 is brought into contact with the outer surface of the label roll R by its own weight from the downstream side in the direction in which the linerless labels L are pulled out, which prevents the label roll R from colliding with components on the cover side or with the frame of the main body 10. Therefore, the printer 100 of this embodiment is capable of high-quality printing.

[0043] 10, a modified example in which a tension spring 38 is attached between the link arm 34 and the retaining arm 36 will be described below. The printer according to this modified example has substantially the same structure as the printer 100 of the above-described embodiment, except for the addition of the tension spring 38. Therefore, only the parts that differ from the above-described embodiment will be described in detail here.

[0044] The tension spring 38 is in a slightly stretched state, with one end 381 fixed to the slide shaft 30 side at the left-right center of the intermediate frame 344 of the link arm 34, and the other end 382 fixed to the connecting part 361 of the holding arm 36. The tension spring 38 functions to hold the holding arm 36 in a position where the longitudinal direction of the link arm 34 and the longitudinal direction of the holding arm 36 are aligned in a straight line. Multiple tension springs 38 may be installed.

[0045] For example, if an unused label roll R is loaded into the printer as shown in FIG. 1, and the pressure arm 36 is biased clockwise, a pressing force in a direction that places a load on the outer surface of the label roll R in the direction of rotation (counterclockwise) of the label roll R when the linerless label L is pulled out will be applied to the outer surface of the label roll R, making it difficult for the label roll R to rotate. Furthermore, if the pressure arm 36 is biased counterclockwise when the diameter of the label roll R is reduced and the label roll R is positioned as shown in FIG. 6, the tip of the rotating pressure arm 36 will always be pressed against a component on the cover 20 side, and the link arm 34 will attempt to rotate clockwise with the tip of the pressure arm 36 as a fulcrum. In this case, a force will be applied in the direction that the pressing surface 327 of the flapper 32 presses against the outer surface of the label roll R, braking the rotation of the label roll R.

[0046] Therefore, as in this modified example, it is effective to hold the pressure arm 36 in a straight line with the link arm 34, allowing the linerless label L to be properly pulled out from the label roll R, enabling high-quality printing.

[0047] Although the embodiments and modifications of the present invention have been described above, these embodiments and modifications are presented as examples and are not intended to limit the scope of the invention. These novel embodiments and modifications may be embodied in various other forms, and various omissions, substitutions, and modifications may be made without departing from the spirit of the invention. These embodiments and modifications are included within the scope and spirit of the invention, and are also included in the inventions and their equivalents as defined in the claims. [Explanation of symbols]

[0048] 1...discharge outlet, 2...hopper, 4...print head, 6...platen roller, 10...main body, 12...paper guide, 16...bearing hole, 20...cover, 201...lower end, 202...inner surface, 21...rotating shaft, 30...slide shaft, 31...rotating shaft, 32...flapper, 321...long hole, 324...opening, 325...bearing hole, 326...engaging portion, 327...pressing surface, 328...pressing plate portion, 33...rotating shaft, 34...link arm, 345...bearing hole, 346...lower end, 347...pressed surface, 36...holding arm, 361...connecting portion, 100...printer, L...linerless label, R...label roll, T...conveyor path.

Claims

1. a main body including a storage section for storing a roll of a long print medium; a cover that opens and closes the storage section; a conveying unit that draws out the print medium from the roll and sends it out of the main body; a printing unit that prints information on the print medium that is drawn off the roll by the transport unit; a pressing member that is rotatably attached to the cover via a first rotation shaft and presses the roll against an inner surface of the storage portion; a link arm rotatably attached to the main body via a second rotation axis parallel to the first rotation axis, the link arm including a slider slidably inserted into the elongated hole of the pressing member; a restricting member attached to the slider and restricting movement of the roll in the direction in which the print medium is drawn out; A printer having

2. the slider is a slide shaft parallel to the first and second rotation axes, The restricting member is attached to the slide shaft so as to be rotatable. The printer of claim 1 .

3. the regulating member is capable of rotating around the slide shaft due to its own weight and contacting the roll, the pressing member has a locking portion that engages with the regulating member during rotation of the regulating member due to its own weight to prevent further rotation of the regulating member; The printer of claim 2 .

4. a tension spring stretched between the link arm and the regulating member between the second rotation shaft and the slide shaft; The printer of claim 2 .

5. The cover is rotatably attached to the main body via a third rotation shaft that is parallel to and spaced apart from the second rotation shaft, and has a pressing portion that, when rotated from a closing position that closes the storage portion toward an opening position that opens the storage portion, presses a protruding portion of the link arm on the opposite side to the slider with respect to the second rotation shaft, thereby rotating the link arm in a direction approaching the cover. The printer of claim 1 .

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