JP2007175909A - Printer - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enable to simply performing operation for releasing a lock of an opening and closing lid of a sheet roll printer to open the lid. <P>SOLUTION: When the opening and closing lid 3 of a sheet roll printer 1 is closed, a lock lever 53 of the opening and closing lid 3 is hooked from the rear side on an engagement shaft 54 of a printer body 2 side, whereby the opening and closing lid 3 is locked at a closed position. At the same time, contact plate parts 45a of both ends of a fixed blade 45 attached to the opening and closing lid 3 in a recording paper cutter 44 at the side of the opening and closing lid 3 come into contact with a front part 14d of the printer body 2 side, bringing a state that a pressing force in a direction to open the opening and closing lid 3 acts to the opening and closing lid 3 from the side of the printer body 2. When locking of the opening and closing lid 3 is released by operating a lid opening and closing lever 6, the opening and closing lid 3 is automatically pushed out in the open direction by the pressing force acted to the opening and closing lid 3. The opening and closing lid 3 is opened consequently. The opening and closing lid 3 is opened by the simple operation of depressing the lid opening and closing lever 6 only once. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a printer having a mechanism for improving operability when unlocking and opening an opening / closing lid attached to an opening such as a roll paper storage unit.

  In roll paper printers that issue receipts, etc., the recording paper transport from the roll paper storage section to the recording paper discharge port is performed when the open / close lid is opened so that the roll paper can be loaded easily. A structure that can open the path is known. In a roll paper printer having this structure, for example, a platen member facing the print head, a paper pressing roller in contact with the paper feed roller, and a movable blade of a vertical recording paper cutting device are mounted on the opening / closing lid side. Has been. When the opening / closing lid is opened, these members are separated and the recording paper conveyance path is opened. Therefore, when the recording paper is pulled out from the roll paper stored in the recording paper storage section and the opening / closing lid is closed, the recording paper is automatically removed. A state of being set along the recording paper conveyance path is formed. Japanese Patent Application Laid-Open No. 2004-151561 discloses a roll paper printer having such a configuration.

On the other hand, as a locking mechanism for locking the opening / closing lid in the closed position, an engagement shaft is disposed on the printer body side, and a hook portion engageable with the engagement shaft is provided on the opening / closing lid side. In general, a structure in which a lock lever formed in the above is arranged. The lock lever is urged to the lock side by a spring force. When the lid is closed, the tip of the lock lever hits the engagement shaft. After that, the lock lever is engaged as the lid is closed. While being pushed up by the combined shaft, the hook portion gets over the engaging shaft. When the engagement shaft is overcome, the lock lever is moved by the spring force from the front side in the closing direction of the opening / closing lid to the locked position engaged with the engagement shaft, and the opening / closing lid is locked.
JP 2002-308482 A

  Here, in the operation of opening the opening / closing lid, after operating the lid opening / closing lever and moving the lock lever against the spring force to the unlocking position, the opening / closing lid is opened with the lid opening / closing lever held at the unlocking position. Need to move in the direction. That is, after the operation of the lid opening / closing lever is released, it is necessary to move the opening / closing lid in the opening direction at least to a position where the lock lever does not engage the engagement shaft.

  In this way, the lock lever is in a position where it can be engaged with the engagement shaft only by operating the lid opening / closing lever. Therefore, when the operation of the lid opening / closing lever is released, the lock lever is again engaged with the engagement shaft by the spring force. The locked state may be formed and the opening / closing lid may not be opened.

  In view of this point, an object of the present invention is to propose a printer that can open the opening / closing lid with a single operation of the lid opening / closing lever.

In order to solve the above problems, a printer of the present invention includes an opening / closing lid attached to a printer body so as to be openable / closable, a locking mechanism for locking the opening / closing lid in a closed position, and the opening / closing lid in a locked state. A biasing mechanism biasing in the opening direction of the opening / closing lid, and the lock mechanism includes a main body side engaging portion on the printer main body side, a lid side engaging portion on the open / close lid side, and A lock in which the main body side engaging portion and the lid side engaging portion are relatively moved to engage the main body side engaging portion from the front side in the closing direction of the opening / closing lid. And a lock release lever for switching the cover side engagement portion to a lock release state in which the cover side engagement portion is disengaged from the main body side engagement portion, and the biasing mechanism is movable in the opening / closing direction of the opening / closing lid A lid-side contact portion attached to the opening / closing lid in a state, and the lid A biasing member attached to the opening / closing lid in a state where the contact portion is biased in the closing direction of the opening / closing lid, and when the opening / closing lid is closed, the lid side contact portion comes into contact with the lid side contact portion And a main body side abutting portion attached to the printer main body so as to be in a state of pressing the portion in the opening direction of the opening / closing lid.

  When closing the open / close lid, if the lid side contact portion of the urging mechanism hits the main body side contact portion on the printer body side and the open / close lid is locked in the closed position, the body side contact portion causes the lid side The contact portion is pressed with a predetermined pressing force. As a result, a predetermined pressing force is applied to the opening / closing lid from the printer body side in the opening direction of the opening / closing lid. When the lock release lever is operated to open the opening / closing lid, the lid side engaging portion is released from the main body side engaging portion, and the lock is released. Since the opening / closing lid is pressed from the printer body side in the opening direction, the opening / closing lid is automatically kicked in the opening direction when the lock is released. As a result, the lid-side engaging portion is separated from the main-body-side engaging portion, so that the opening / closing lid is not locked again even if the operation of the unlocking lever is released. Thus, the operability when opening the opening / closing lid is improved because the opening / closing lid is opened to a position where it is not locked again by operating the lock release lever only once.

  Here, in a roll paper printer or the like, a recording paper cutting device is mounted in the vicinity of the recording paper discharge port. In this case, a configuration in which a fixed blade is attached to the open / close lid and a movable blade is attached to the printer main body is employed, the fixed blade is used as the lid-side contact portion, and the biasing member is fixed to the fixed body. A spring member spanned in a tension state between the blade and a portion of the opening / closing lid that is further away from the fixed blade in the closing direction of the opening / closing lid. If this structure is employ | adopted, a cover side contact part can be arrange | positioned easily, without adding the member for it.

  When the present invention is applied to a roll paper printer, the opening / closing lid can be used as an opening / closing lid for opening / closing an opening for inserting / removing the roll paper into / from the roll paper storage unit. In this case, in order to make it easy to load the roll paper, a main body side roller for conveying the recording paper is arranged in the printer main body, and the main body side roller is brought into contact with the opening / closing lid. When the lid-side roller is disposed and the opening / closing lid is opened, the fixed-blade and the movable blade of the recording paper cutting device and between the main body-side roller and the lid-side roller from the roll paper storage unit It is desirable that the recording paper transport path for transporting the recording paper via the blades is opened.

  In such a roll paper printer, the locked lid is always pressed in the opening direction by the urging mechanism. Therefore, since the state where the open / close lid is not loosely locked in the closed position can be formed, it is possible to form a state where the lid side roller mounted on the open / close lid is brought into contact with the main body side roller with high accuracy. Therefore, adverse effects such as variations in the paper feed pitch due to variations in these contact positions do not occur.

  In the printer of the present invention, when the opening / closing lid is locked in the closed position, the lid-side contact portion provided on the opening / closing lid is pressed by the body-side contact portion provided on the printer body side, and the opening / closing lid as a whole is in the opening direction. The pressing force is applied. When the lock of the open / close lid is released by operating the lock release lever, the open / close lid is kicked in the opening direction by the pressing force acting from the printer main body side.

As described above, in the present invention, the opening / closing lid is unlocked and automatically sent in the opening direction by operating the lock release lever only once, so that the operation for opening the opening / closing lid becomes extremely simple.

  Embodiments of a printer to which the present invention is applied will be described below with reference to the drawings.

(overall structure)
FIG. 1 is an external perspective view of an ink jet type roll paper printer to which the present invention is applied, and FIG. 2 is an external perspective view of a state in which the opening / closing lid is fully opened. Referring to these drawings, the roll paper printer 1 of this example has a printer body 2 having a substantially rectangular parallelepiped shape as a whole, and an open / close lid 3 attached to the front surface of the printer body 2.

  A recording paper discharge port 4 having a predetermined width is formed on the front surface of the outer case 2 a of the printer main body 2. A paper discharge guide 5 protrudes forward below the recording paper discharge port 4, and a lid opening / closing lever 6 (lock release lever) is disposed on the side of the paper discharge guide 5. A rectangular opening 2b for inserting and removing roll paper is formed below the paper discharge guide 5 and the lid opening / closing lever 6 in the outer case 2a. The opening 2b is sealed by the opening / closing lid 3. When the lid opening / closing lever 6 is operated, the opening / closing lid 3 is unlocked and kicked in the opening direction as described later. When the paper discharge guide 5 is pulled forward, as shown in FIG. 2, the opening / closing lid 3 opens until it is substantially horizontal forward with the lower end as a center. When the opening / closing lid 3 is opened, the roll paper storage unit 11 formed in the printer is opened, and the roll paper can be exchanged from the front of the printer.

  An opening 2c is also formed on the right side of the opening / closing lid 3, and an opening / closing lid 7 that can be opened / closed around the lower end is attached to the opening 2c. When the opening / closing lid 7 is opened, the ink cartridge loading unit 18 as an ink supply unit is opened, and the ink cartridge can be replaced. An operation surface 2d is adjacent to the left side of the opening / closing lid 3, and a status display lamp composed of LEDs, a paper feed button, and the like are arranged therein.

  FIG. 3 is a perspective view showing a printer mechanism portion built in the outer case 2a of the roll paper printer 1, and FIG. 4 is a schematic longitudinal sectional view when the printer mechanism portion is cut in the front-rear direction. The printer mechanism unit 10 includes a roll paper storage unit 11 at the center in the width direction. The roll paper storage unit 11 stores the roll paper 12 in a horizontally placed state facing the printer width direction. A head unit 13 is mounted horizontally on the upper side of the roll paper storage unit 11. The head unit 13 includes a head unit frame 14, and a carriage guide shaft 15 extends horizontally between the left and right side plate portions 14 a and 14 b of the head unit frame 14. A carriage 17 on which the head 16 is mounted in a downward state can reciprocate.

  As shown in FIG. 3, an ink cartridge loading unit 18 and a head maintenance unit 20 are disposed in the lower part of the left side portion of the head unit 13 adjacent to the right side of the roll paper storage unit 11. An ink cartridge (not shown) can be attached to the ink cartridge loading unit 18 disposed on the lower side. The head maintenance unit 20 disposed on the upper side collects the wiper for wiping the nozzle surface of the inkjet head 16 and the waste ink discharged or discharged from each nozzle on the nozzle surface, similarly to the known head maintenance unit. A recovery unit (not shown) is provided. A lower portion of the right side portion of the head unit 13 adjacent to the left side of the roll paper storage portion 11 is a substrate mounting portion 22 on which a control substrate (not shown) is mounted.

As shown in FIG. 4, in the printer mechanism unit 10, a recording paper guide 32 is disposed horizontally along the printer width direction at a rear portion between the roll paper storage unit 11 and the head unit 13. Yes. On the front side of the recording paper guide 32, a platen guide 33 is disposed horizontally in the front-rear direction of the printer at a position one step higher. An ink jet head 16 mounted on the carriage 17 is disposed directly above the platen guide 33. The nozzle surface 16a of the inkjet head 16 is opposed to the upper surface 33a of the platen guide 33 with a certain gap, and the printing position is defined by the upper surface 33a.

  A first paper feed roller 34 is stretched horizontally in the printer width direction between the platen guide 33 that defines the print position and the recording paper guide 32. A first paper pressing roller 35 having a predetermined width is pressed from the lower side to the first paper feeding roller 34 with a predetermined pressing force. The first paper feed roller 34 is driven by a paper feed motor 36 mounted on the head unit 13 via a belt / pulley type transmission mechanism 36a (see FIG. 5). A second paper feed roller 37 is disposed at the front end portion of the platen guide 33. A second paper pressing roller 38 is pressed against the second paper feeding roller 37 from above.

  The carriage 17 is reciprocated in the printer width direction (printing width direction) by a carriage transport mechanism including a carriage motor 39 and a timing belt 40. When the carriage 17 reciprocates, printing is performed on the surface of the recording paper 12a that is fed from the roll paper 12 and passes the printing position by the ink jet head 16 mounted thereon.

  An ink damper 41 is mounted on the carriage 17, and a flexible ink tube 42 is connected thereto. Each color ink is supplied to the inkjet head 16 from the ink cartridge mounted on the ink cartridge loading unit 18 via the ink tube 42, and full-color printing can be performed by the inkjet head 16.

  A scissors-type recording paper cutting device 44 is disposed at the recording paper discharge port 4 from which the recording paper 12a after printing is discharged. The fixed blade 45 of the recording paper cutting device 44 is arranged vertically in the upward state, and the movable blade 46 is arranged vertically downward. When the movable blade 46 pivots in the vertical direction with one end in the printer width direction as a fulcrum by the movable blade drive mechanism 47, the contact point with the fixed blade 45 moves in the printer width direction, and the recording paper positioned between them. 12a can be cut in the width direction.

  Here, in the opening / closing lid 3, a platen guide 33, a recording paper guide 32, a first paper pressing roller 35, a second paper feeding roller 37, and a fixed blade 45 are mounted on a lid frame 51. A lid opening / closing lever 6 and a recording paper discharge guide 5 are attached to the front end of the lid frame 51. The open / close lid 3 of this example is configured to open and close while maintaining a horizontal state by, for example, a parallel link mechanism.

  When the opening / closing lid 3 is opened, the roll paper loading / unloading opening 2b of the roll paper storage unit 11 is opened, and the recording paper transport path from the roll paper storage unit 11 to the recording paper discharge port 4 is opened. Become. Therefore, when the roll paper 12 is stored in the roll paper storage unit 11, the recording paper 12a is pulled out from the roll paper 12 by a predetermined length, and then the opening / closing lid 3 is closed, as shown by a thick dashed line in FIG. The recording paper 12 a drawn from the roll paper 12 stored in the roll paper storage unit 11 is guided by the recording paper guide 32, and the platen guide 33 is interposed between the first paper feed roller 34 and the first paper pressing roller 35. A recording paper set state in which the recording paper is drawn out from the recording paper discharge port 4 through the space between the second paper feeding roller 37 and the second paper pressing roller 38 via the upper surface 33a (printing position) is formed.

When the first paper feed roller 34 and the second paper feed roller 37 rotate in this state, the conveyance of the recording paper 12a is started. The inkjet head 16 is driven in synchronization with the conveyance of the recording paper 12a, and printing is performed on the surface of the recording paper 12a passing through the printing position. After the completion of the predetermined printing, for example, the conveyance is stopped in a state where the recording paper 12a after printing is discharged from the recording paper discharge port 4, and the recording paper 12a is cut by the recording paper cutting device 44 to have a predetermined length. A printed sheet of printed paper is issued.

(Locking mechanism and biasing mechanism of the lid)
Next, referring to FIGS. 4 to 6, a lock mechanism for locking the open / close lid 3 in the closed position, and an urging mechanism for sending the open / close lid 3 in the opening direction when the lock of the open / close lid 3 is released. Will be explained. FIG. 5 is a perspective view showing the printer mechanism unit 10 with the head unit portion other than the power transmission system of the paper feed motor, the left and right ink cartridge mounting portions, the head maintenance unit, and the substrate mounting portion removed. FIG. 6 is an explanatory view showing main parts of the lock mechanism and the urging mechanism.

  First, the locking mechanism for locking the opening / closing lid 3 in the closed position includes a support shaft 52 that is stretched in the opening / closing cover opening / closing direction at the front portion of the cover frame 51, and both end portions of the support shaft 52. A pair of left and right lock levers 53 (only one side is shown in the figure) which is a lid side engaging portion fixed to the printer body 2 and a main body side engaging portion provided on the printer main body 2 side. A pair of left and right engaging shafts 54 (only one side is shown in the figure) is provided. The lid opening / closing lever 6 is fixed to the end of the support shaft 52. When the cover opening / closing lever 6 is pressed, the support shaft 52 rotates and the front end side of the lock lever 53 fixed to both ends thereof (the rear side of the printer). Can be swung upward. The lock lever 53 is always urged in the lock direction by a torsion spring or the like.

  The lock lever 53 is a vertical plate having a substantially constant width that protrudes from both ends of the support shaft 52 toward the rear of the printer, and the lower end surface of the front end thereof is inclined downward from the rear side of the printer toward the front side. An inclined end surface 53a is formed. A hook portion 53b that can be engaged with the engagement shaft 54 from the rear side of the printer (front side in the closing direction of the opening / closing lid) is formed at the lower end portion of the inclined end surface 53a. That is, the engagement end surface 53c bent upward is continuous with the lower end of the inclined end surface 53a, and the lower end surface 53d bent and extended forward of the printer is continuous with the upper end of the engagement end surface 53c.

  The left and right engagement shafts 54 on the printer main body 2 side are shafts that project at right angles from the outer surfaces of the side plate portions 55 and 56 on both sides of the roll paper storage unit 11 toward the outside in the printer width direction. When the opening / closing lid 3 is closed, along with the closing operation, the inclined end surface 53a of the lock lever 53 hits the engagement shaft 54. Thereafter, the lock lever 53 is pushed upward, and the hook portion 53b moves the engagement shaft 54. The locked end state is formed in which the engagement end surface 53c is engaged with the engagement shaft 54 from the rear side of the printer.

  When the lid opening / closing lever 6 is pushed in the locked state, the tip portions of the left and right lock levers 53 pivot upward, and the hook portions 53b are disengaged upward from the engagement shaft 54, and the locked state is released.

  Here, in order to securely lock the lock lever 53 with respect to the engagement shaft 54, the opening / closing lid 3 can be pushed to the rear of the printer a little more than the closed position. Therefore, in the locked state, the opening / closing lid 3 is in a backlashed state in the front-rear direction. In this example, the rattling is prevented by the urging mechanism described below, so that the opening / closing lid 3 can be locked in a state of being positioned at the closed position.

The urging mechanism of this example includes a fixed blade 45 mounted on the open / close lid 3 and a tension coil spring 61 that pulls the fixed blade 45 toward the rear side of the printer (in the closing direction of the open / close lid). The fixed blade 45 is attached by a front end portion 51a of the lid frame 51 so as to be slightly movable in the front-rear direction of the printer (opening / closing lid opening / closing direction). The tension coil spring 61 is hooked at the left and right end portions of the fixed blade 45, and the rear ends of the tension coil spring 61 are hooked by a spring hook 51 b formed on the rear side of the fixed blade 45 in the lid frame 51. ing. By these tension coil springs 61, the fixed blade 45 is constantly urged toward the rear side of the printer (in the closing direction of the opening / closing lid).

  The left and right end portions of the fixed blade 45 are formed with a pair of left and right contact plate portions 45a (lid side contact portions) protruding upward. These abutting plate portions 45a can abut on the front surface portion 14d (main body side abutting portion) of the lower edge portions of the front plate portion 14c of the unit frame 14 of the head unit 13 from the front of the printer. In this example, when the opening / closing lid 3 is closed, immediately before the hook portion 53b of the lock lever 53 of the lock mechanism is hooked on the engagement shaft 54, the contact plate portion 45a is the front portion 14d of the front plate portion 14c. It is set so that it may contact.

  The effect of the urging mechanism having this configuration will be described. As shown in FIG. 6, when closing the open / close lid 3, it is fixed immediately before the hook portions 53 b of the left and right lock levers 53 of the lock mechanism are hooked on the left and right engagement shafts 54 on the printer body 2 side. The left and right contact plate portions 45a of the blade 45 hit the front surface portion 14d of the front plate portion 14c on the printer main body side. When the open / close lid 3 is pushed in and a locked state is formed by the lock mechanism, the fixed blade 45 is pushed forward from the printer body 2 side by a predetermined pressing force. The fixed blade 45 is supported on the lid frame 51 of the open / close lid 3 by a pair of left and right tension coil springs 61. Therefore, the opening / closing lid 3 is pulled in front of the printer as a whole by the pressing force applied to the fixed blade 45 from the printer body 2 side. As a result, the engagement end surfaces 53c of the hook portions 53b of the left and right lock levers 53 in the lock mechanism are pressed against the left and right engagement shafts 54 from the rear side. That is, the open / close lid 3 is locked in a state where the open / close lid 3 is positioned without looseness at the closed position.

  Accordingly, in the closed state of the opening / closing lid 3, the first paper pressing roller 35 and the second paper feeding roller 37 mounted on the opening / closing lid 3 are the first paper feeding roller 34 and the second paper pressing roller 37 on the printer body 2 side. 38 in a state of being reliably positioned with respect to 38. Therefore, since these recording paper nip forces can be kept constant, adverse effects such as fluctuations in the nip force due to variations in the roller contact position, variations in the paper feed pitch, and deterioration in print quality can be prevented.

  Next, the operation when opening the opening / closing lid 3 locked in the closed position will be described. When the lid opening / closing lever 6 is pushed downward, the left and right lock levers 53 of the lock mechanism pivot, and the hook portions 53b move upward to disengage from the left and right engagement shafts 54 on the printer body 2 side. The lock is released.

  Here, as described above, the opening / closing lid 3 is applied with a predetermined pressing force in the opening direction from the printer main body 2 side by the biasing mechanism. When the lock is released, the opening / closing lid 3 is automatically kicked forward (in the opening direction) by the pressing force. As a result, the hook portion 53b of the lock lever 53 of the lock mechanism moves to a position in front of the printer with respect to the engagement shaft 54. Therefore, even if the operation of the lid opening / closing lever 6 is released, the opening / closing lid 3 is again locked. There is nothing.

  The open / close lid 3 kicked forward is automatically opened to its fully open state by its own weight with its lower end as a center. In order to adjust the opening speed of the opening / closing lid 3, a coil spring that urges the opening / closing lid 3 with a predetermined force in the closing direction may be bridged between the support of the opening / closing lid 3 and the printer body 2. Alternatively, a torsion spring or the like may be disposed on a support shaft that defines the rotation center of the opening / closing lid 3.

Thus, in this example, the lock of the opening / closing lid 3 is released by a simple operation of pushing the lid opening / closing lever 6 only once, and the opening / closing lid 3 is automatically sent in the opening direction. Therefore, the operability when opening the opening / closing lid 3 is improved.

(Other embodiments)
In the above example, the present invention is applied to a roll paper printer. The present invention can also be applied to an opening / closing lid in a printer other than a roll paper printer.

  Moreover, although the above example is an ink jet type roll paper printer, the present invention can be applied to a printer having a print head of a type other than the ink jet type.

  Further, in the above example, an urging mechanism for automatically feeding the opening / closing lid in the opening direction using the fixed blade of the recording paper cutting device is configured, but the opening / closing lid functions as a lid side contact portion. A separate part may be attached.

  Furthermore, in the lock mechanism of the above example, the lock lever is arranged on the opening / closing lid side, but the locking lever may be arranged on the printer main body side and the engaging shaft may be arranged on the opening / closing lid side. In addition, the main body side engaging portion and the lid side engaging portion can employ various shapes and structures.

1 is an external perspective view of a roll paper printer to which the present invention is applied. FIG. 2 is an external perspective view of a roll paper printer with an open / close lid open. It is a perspective view showing a printer mechanism part of a roll paper printer. It is a schematic longitudinal cross-sectional view of a printer mechanism part. It is a perspective view which shows the printer mechanism part in the state which abbreviate | omitted one part. It is explanatory drawing which shows the locking mechanism and urging | biasing mechanism of an opening-and-closing lid.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Roll paper printer, 2 Printer main body, 2a Exterior case, 2b Opening part, 3 Opening / closing lid, 4 Recording paper discharge port, 5 Paper discharge guide, 6 Lid opening / closing lever, 11 Roll paper storage part, 12 Roll paper, 12a Recording paper , 13 Head unit, 14 Head unit frame, 14c Front plate portion, 14d Front portion (main body side contact portion), 32 Recording paper guide, 33 Platen guide, 34 First paper feed roller, 35 First paper press roller, 37 Second paper feed roller, 38 Second paper press roller, 44 Recording paper cutting device, 45 Fixed blade (lid side contact portion), 45a Contact plate portion, 46 Movable blade, 51 Cover frame, 51b Spring hook, 52 Support Shaft, 53 Lock lever (lid side engaging portion), 53b Hook part, 54 Engaging shaft (main body side engaging portion), 61 Tension coil spring (biasing member)

Claims (3)

An open / close lid attached to the printer body so as to be openable and closable;
A locking mechanism for locking the open / close lid in a closed position;
A biasing mechanism that biases the open / close lid in the locked state in the opening direction of the open / close lid;
The lock mechanism relatively moves the main body side engaging portion on the printer main body side, the lid side engaging portion on the open / close lid side, the main body side engaging portion and the lid side engaging portion, A locked state in which the lid side engaging portion is engaged with the main body side engaging portion from the front side in the closing direction of the opening / closing lid, and a lock in which the lid side engaging portion is released from the main body side engaging portion. A lid opening / closing lever for switching to the release state,
The biasing mechanism biases the lid-side contact portion attached to the opening / closing lid in a state movable in the opening / closing direction of the opening / closing lid, and the lid-side contact portion in the closing direction of the opening / closing lid. The urging member attached to the open / close lid in a state, and when the open / close lid is closed, the abutment portion comes into contact with the lid-side contact portion and presses the lid-side contact portion in the opening direction of the open / close lid Thus, a printer comprising a main body side contact portion attached to the printer main body. In claim 1,
A recording paper cutting device comprising a fixed blade attached to the open / close lid and a movable blade attached to the printer body;
The lid-side contact member is the fixed blade,
The printer is characterized in that the biasing member is a spring member that is stretched between the fixed blade and a portion of the open / close lid that is further away from the fixed blade in the closing direction of the open / close lid. . In claim 2,
A roll paper storage portion formed in the printer body;
The opening / closing lid is an opening / closing lid for opening / closing an opening for taking in and out the roll paper with respect to the roll paper storage unit,
A main body side roller for conveying the recording paper is arranged in the printer main body, and a lid side roller in contact with the main body side roller is arranged in the opening / closing lid,
When the open / close lid is opened, the recording paper is conveyed from the roll paper storage unit between the main body side roller and the lid side roller and between the fixed blade and the movable blade of the recording paper cutting device. The printer is characterized in that the recording paper transport path to be opened is in an open state.

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