JP5382068B2 - Printer - Google Patents

Description

In the present invention a paper cutting device, particularly relates to a printer such as a roll paper printer (roll paper for printing printer), Bei paper cutting device that can be incorporated without causing its dimensions increase
This is related to the obtained printer.

  In a printer that prints on tape-like recording paper (roll paper) wound on a roll, the recording paper is placed in the recording paper discharge port so that the printed recording paper can be cut into a predetermined length and issued as a receipt. In general, a cutting device is incorporated. As a recording paper cutting device, a so-called scissor type device including a fixed blade and a movable blade is known. Patent Document 1 discloses a saddle type recording paper cutting device, and Patent Document 2 discloses a roll paper printer in which a saddle type recording paper cutting device is incorporated.

  In the printer disclosed in Patent Document 2, a fixed blade is mounted on the side of an opening / closing lid for opening and closing a storage unit for storing roll paper, and a movable blade is mounted on the printer body side. When the opening / closing lid is opened, the movable blade and the fixed blade are also separated, and the path from the roll paper storage section to the recording paper discharge port through the printing position and the recording paper cutting position is opened.

  Here, the fixed blade and the movable blade of the scissors-type recording paper cutting device are arranged to face each other from the up-down direction of the printer or the front-rear direction of the printer, and their blade edges are held in a point contact state. Further, by turning the movable blade around the recording paper cutting start side end, the point contact position of both cutting edges is moved from the recording paper cutting start side end to the cutting end side end. A portion of the recording paper located between the two is cut.

Japanese Patent Laid-Open No. 8-309688 JP-A-9-254474

  As described above, in the scissors type recording paper cutting device, it is necessary to secure a space for arranging both of them in the up / down direction or the front / rear direction of the printer, which is the facing direction of the fixed blade and the movable blade. In addition, a space for moving the movable blade is also required. Accordingly, there is a problem in that an increase in the size of the printer cannot be suppressed in order to secure a space for incorporating a vertical recording paper cutting device. In particular, when the recording paper discharge port is directed forward or rearward at the upper end of the printer, if a recording paper cutting device in which a fixed blade and a movable blade are opposed to each other in the vertical direction is incorporated therein, The dimensions will increase.

SUMMARY OF THE INVENTION In view of the above, the problem of the present invention is a saddle type paper cutting device having a small and compact configuration.
Is to propose a printer in which is incorporated .

  Another object of the present invention is to propose a printer in which a saddle type recording paper cutting device is incorporated without causing an increase in size.

In order to solve the above problems, the printer of the present invention provides:
The printer itself,
An open / close lid unit attached to the printer body so as to be openable and closable;
A fixed blade attached to the printer body side, a movable blade attached to the open / close lid unit, and a recording paper cutting device provided with a movable blade drive mechanism attached to the open / close lid unit ,
The opening / closing lid unit can be opened from a closed position standing vertically to an open position opened by a predetermined angle forward or rearward of the printer with the lower end portion as a center,
The movable blade of the recording paper cutting device is a front plate portion provided in the opening / closing lid unit in a state where the opening / closing unit is in a closed position, and a blade edge is directed upward at an upper end portion of the opening / closing lid unit. Arranged in the vertical direction in the printer width direction,
The fixed blade is attached to the printer body so as to be movable in a first direction in which the cutting edge faces and a second direction opposite to the first direction, and is urged in the first direction by an urging member. Is arranged in the printer width direction in a horizontal posture at the upper end portion of the printer body facing the upper end portion of the opening / closing lid unit in the closed position,
In a state where the opening / closing lid unit is in the closed position, the movable blade and the fixed blade of the recording paper cutting device are in a state of being orthogonal to each other, and the cutting edge of the movable blade is moved by the urging force of the urging member. It is in a state of contacting the cutting edge of the fixed blade on the side of the paper cutting start edge,
The movable blade drive mechanism moves the movable blade on the paper cutting start side so that the contact position of the blade edge of the fixed blade and the blade edge of the movable blade moves toward the paper cutting end edge of these blade edges. It is designed to swivel along the front plate portion around the end,
When the movable blade turns, the movable blade moves the fixed blade in the second direction against the urging force of the urging member.
Inside the printer body, in a state where the open / close lid unit is in the closed position, a roll paper storage unit is formed which is surrounded by an arc-shaped paper guide, on the paper guide, and before the paper guide, A front of the paper guide is mounted together with a movable blade .

In the printer of the present invention , the recording paper cutting device is arranged in a posture in which the fixed blade and the movable blade are substantially orthogonal to each other, so that the installation space for these two blades can be reduced as compared with the case where they are opposed to each other. Therefore, a recording paper cutting device that is small and compact as a whole can be realized. In addition, when the fixed blade and the movable blade are arranged to face each other and the blade edges are brought into contact with each other in a state where the blade edge portions are stacked in the thickness direction (alignment position), the blade edges are at an appropriate contact angle. In order to cut the recording paper in the point contact state, it is necessary to curve the fixed blade and the movable blade so that the entire blade is warped along the direction of the blade edges. In the present invention, both the cutting edges are pressed against each other in a point contact state from a substantially orthogonal direction, so that the cutting edges are brought into contact with each other at an appropriate contact angle using a flat plate-like fixed blade and a movable blade. The recording paper can be cut. Therefore, a process for warping both blades becomes unnecessary, and the manufacturing cost can be reduced.

In the recording paper cutting device of the present invention, the fixed blade is movable in a direction substantially orthogonal to the movable blade, and the fixed blade is biased by a biasing member toward the movable blade. It is characterized by that. That is, the fixed blade has a first direction in which the cutting edge faces and the first direction.
It is attached to the printer main body so as to be movable in a second direction that is opposite to the direction.
The biasing member is biased in the first direction.
The movable blade and the fixed blade of the recording paper cutting device are in a state of being orthogonal to each other, and the urging member
The cutting edge of the movable blade is against the cutting edge of the fixed blade by the biasing force of the paper cutting start edge.
The movable blade driving mechanism is in contact with the blade edge of the fixed blade and the movable blade.
The abutment position of the blade edges moves toward the end of paper cutting at these blade edges.
The movable blade is swiveled around the end of the paper cutting start side,
When the movable blade turns, the stationary blade resists the urging force of the urging member by the movable blade.
Then, it is moved in the second direction. Since it is possible to avoid the movable blade from being gnawed by the fixed blade, a smooth paper cutting operation can be ensured.

Furthermore , in the recording paper cutting device of the present invention, the urging position of the fixed blade by the urging member is:
In the direction along the cutting edge of the fixed blade, a position off the edge end paper cutting at the cutting edge of the fixed blade, and characterized in that it is a position outside the cutting range of the movable blade and the fixed blade. When the fixed blade is urged between the paper cutting start edge and the paper cutting end edge, the fixed blade is set according to whether the paper cutting position (the contact position of both blade edges) by both blade edges is before or after the biasing position. Rotation moment in the opposite direction to the original occurs. For this reason, when the paper cutting position passes through the urging position, there is a possibility that the fixed blade may rattle and the cutting line may be disturbed.
In the present invention, the paper can be cut without causing such an adverse effect and without causing any disturbance in the cutting line.

  In the printer of the present invention, a recording paper cutting device having a fixed blade and a movable blade arranged in a substantially orthogonal posture is incorporated. Since this recording paper cutting device can be configured to be smaller and more compact than a recording paper cutting device in which both blades are opposed to each other, a mounting space is small. Therefore, a printer equipped with the recording paper cutting device of the present invention requires less installation space, and can be configured to be small and compact.

  Further, in the printer of the present invention, the opening / closing lid unit can be opened from a closed position standing substantially vertically around the lower end portion thereof to an open position opened by a predetermined angle forward or backward of the printer, The movable blade of the recording paper cutting device is arranged in the printer width direction with the blade edge facing upward substantially vertically at the upper end of the opening / closing lid unit, and the fixed blade of the recording paper cutting device is The upper end portion of the printer main body facing the upper end portion of the lid unit is arranged in a substantially horizontal posture in the printer width direction.

  In the printer having this configuration, since the vertical dimension of the recording paper cutting device is small, an increase in the vertical dimension of the printer can be suppressed, and the height dimension can be reduced as compared with the conventional printer.

Next, in the printer of the present invention, in conjunction with the opening operation of the opening / closing lid unit, the fixed blade retracting mechanism retracts the fixed blade in a direction away from the movable blade against the biasing force of the biasing member. It is characterized by having. When the open / close lid unit is opened, the blade edge of the fixed blade attached to the upper end of the printer main body is exposed. Therefore, by retracting the fixed blade by the fixed blade retracting mechanism, a state where the operator's finger does not touch the blade tip can be formed.

  Here, the printer of the present invention can employ the following configuration. That is, it has a fixed blade mounting plate to which the fixed blade is mounted and a swivel plate that supports the fixed blade mounting plate, and the swivel plate can be swung in the front-rear direction of the printer around its lower end. In this state, the fixed blade mounting plate is attached to an upper end portion that is attached to the printer main body and can swing in the front-rear direction of the printer substantially orthogonal to the movable blade, and the biasing member is fixed The blade mounting plate is energized, and the fixed blade retracting mechanism includes an engagement portion attached to the opening / closing lid unit and an engaged portion attached to the swivel plate, and the opening operation of the opening / closing lid unit In conjunction with this, the engaging portion pushes the engaged portion, forcing the swivel plate in a direction in which the fixed blade mounting plate attached to the upper end portion of the swivel plate is separated from the movable blade. It is designed to turn.

In the vertical recording paper cutting apparatus incorporated in the printer of the present invention, the fixed blade and the movable blade are arranged in a substantially orthogonal posture, and the blade edges are in contact with each other from the orthogonal direction. Therefore, compared with the conventional scissors-type recording paper cutting device in which the fixed blade and the movable blade are arranged to face each other and the blade tips are brought into contact with each other in the thickness direction, the configuration can be made small and compact.

  In addition, since the cutting edges are brought into contact with each other from a substantially orthogonal direction, the contact state of both cutting edges can be formed at an appropriate contact angle without warping the fixed blade and the movable blade. Therefore, it becomes easy to manufacture the double-edged blade, and it is possible to reduce the manufacturing cost and improve the manufacturing quality.

  Next, in the printer of the present invention, since the mounting space for the recording paper cutting device incorporated therein can be reduced, an increase in the size of the device due to the incorporation of the recording paper cutting device can be suppressed, and the size and size can be reduced. Can be configured.

  In addition, the fixed blade and the movable blade are in contact with each other in the direction perpendicular to them, unlike the case where the two blade tips are in contact with each other in the thickness direction, so that the movable blade is in the middle of cutting the paper. It is extremely easy to arrange both blades so that the open / close lid unit can be opened even in a stopped state.

  In addition, the fixed blade attached to the printer body is retracted in conjunction with the opening operation of the open / close lid unit, so that when the open / close lid unit is open, the operator's fingertip touches the blade edge of the fixed blade and is injured. It is possible to avoid harmful effects such as

1 is an external perspective view of a roll paper printer to which the present invention is applied. FIG. 3 is an external perspective view of the roll paper printer with an opening / closing lid opened. It is a schematic block diagram which shows the internal structure of a roll paper printer. FIG. 4 is a perspective view, a plan view, and a side view of a printer main body and an opening / closing lid unit of a roll paper printer. FIG. 6 is an operation explanatory diagram of a recording paper cutting device of a roll paper printer. FIG. 6 is an operation explanatory diagram of a recording paper cutting device of a roll paper printer. It is explanatory drawing which shows the fixed blade evacuation mechanism of a roll paper printer.

  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 a roll paper printer to which the present invention is applied, and FIG. 2 is an external perspective view showing a state in which the opening / closing lid unit is opened.

  The thermal printer 1 according to the present embodiment has a printer main body 2 and an opening / closing lid unit 3 attached to the front surface thereof, and an operation panel unit 4 is attached to an end of the front surface of the printer main body 2. A recording paper discharge port 5 extending in the printer width direction is formed at the upper end portion of the opening / closing lid unit 3 on the front surface of the printer.

  The printer main body 2 is covered with a box-shaped main body case 6 which is long before and after the front and bottom surfaces are opened. On the front surface of the open / close lid unit 3, an open / close lid case 7 that defines the front surface of the printer is attached. When the operating lever 8 disposed on the operation panel unit 4 is operated, the opening / closing lid unit 3 is unlocked by a lid lock (not shown) and opens forward with the lower end as a center. When the opening / closing lid unit 3 is opened, the roll paper storage unit 9 formed inside is exposed, so that the roll paper 10 can be replaced. On the front surface of the operation panel unit 4, a status display lamp group 4a made of LEDs and the like, a feed button 4b, and a power switch 4c are arranged.

  FIG. 3 is a schematic configuration diagram showing the inside of the thermal printer 1. Inside the thermal printer 1, there is formed a roll paper storage portion 9 surrounded by an arcuate paper guide lower portion 12, a paper guide upper portion 13 and a paper guide front portion 14 extending in the printer width direction. Here, the roll paper 10 is housed in a rollable state, and the tape-like recording paper 10 a fed out from the roll paper 10 passes through a printing position between the platen roller 15 and the thermal head 16 and is drawn forward. Then, the paper is discharged forward from the recording paper discharge port 5 located in front of it.

  The recording paper discharge port 5 is formed between the front end edge 6b of the top plate portion 6a of the main body case 6 and the arc-shaped top plate portion 7a of the open / close lid case 7 positioned below this. A scissors-type recording paper cutting device 20 is disposed in front of the recording paper discharge port 5.

  The recording paper cutting device 20 includes a fixed blade 21 mounted on the printer body 2 side, a movable blade 22 and a movable blade drive mechanism 23 mounted on the opening / closing lid unit 3 side. The fixed blades 21 are arranged in the printer width direction in a substantially horizontal posture with the blade edge 21a facing forward. The movable blades 22 are arranged in the printer width direction at a position almost directly below the blade edge 21a of the fixed blade 21 with the blade edge 22a facing upward. In a state where the recording paper 10a is ejected between these cutting edges 21a and 22a (recording paper cutting position), the recording paper 10a is turned by the both cutting edges 21a and 22a by turning the lower movable blade 22 upward. Cut in the width direction of the printer while sandwiching this part.

  As described above, the opening / closing lid unit 3 is mounted with the paper guide front 14 and the platen roller 15 of the roll paper storage unit 9 and the movable blade 22 of the recording paper cutting device 20. Therefore, when the opening / closing lid unit 3 is opened from the closed position 3A to the open position 3B, as shown in FIG. 2, the roll paper storage unit 9 is opened and the roll paper storage unit 9 passes through the printing position and the cutting position. As a result, the recording paper conveyance path to the recording paper discharge port 5 is opened. Therefore, when the open / close lid unit 3 is closed in a state where the recording paper 10a is pulled out from the roll paper 10 stored in the roll paper storage unit 9, the state in which the recording paper 10a is set along the recording paper conveyance path is automatically set. Can be formed.

(Recording paper cutting device)
4A, 4 </ b> B, and 4 </ b> C are a perspective view, a plan view, and a side view showing main portions of the printer main body 2 and the open / close lid unit 3 with the main body case 6 and the open / close lid case 7 removed. There is shown a case where the recording paper cutting device 20 is in a state before starting to cut the recording paper 10a. FIGS. 5A to 5C are a perspective view, a plan view, and a side view showing a state where the recording paper cutting device 20 cuts the recording paper 10a halfway, and FIGS. 6A to 6C. These are the perspective view, the top view, and the side view which show the state of the cutting end.

  Referring to these drawings, the printer main body 2 includes a base plate 31 that defines the bottom surface of the printer, and left and right side plates 32 and 33 that stand vertically from the base plate 31 at regular intervals. A head fixing plate 34 is provided between upper end portions of the side plates 32 and 33. The thermal head 16 is attached to the lower surface of the head fixing plate 34. Swivel plates 35 and 36 extending in the vertical direction of the printer are arranged outside the left and right side plates 32 and 33. The lower ends of the swiveling plates 35 and 36 can be swung in the front-rear direction of the printer around the support shafts 37 and 38 (only the support shaft 37 is shown in the drawing) with respect to the front end side lower end portion of the side plate 32. Supported by the state.

  The swivel plate 35 has a shape including an inclined portion 35a extending obliquely upward from the support shaft 37 toward the rear side and a vertical portion 35b extending substantially upward from the upper end. In the vertical portion 35b, elongated holes 35c and 35d are formed at two upper and lower portions, and guide pins 39 and 40 attached to the side plate 32 are slidably inserted into these elongated holes 35c and 35d, The turning range of the turning plate 35 in the front-rear direction is restricted. The other swivel plate 36 has the same configuration, and its illustration and description are omitted.

  The upper ends of the left and right swiveling plates 35 and 36 are located above the head mounting plate 34, and a rectangular fixed blade mounting plate 41 is bridged horizontally in the printer width direction between them. The fixed blade mounting plate 41 is formed with elongated guide holes 41a and 41b extending in the front-rear direction of the printer at portions on both sides in the printer width direction. Similarly, an elongated guide hole 41c is also formed in a protruding plate portion protruding rearward from the left portion on the rear end side of the printer. Guide pins (not shown) that are inserted into the long holes 41 a to 41 c from above are formed on the back surface of the top plate portion 6 a in the main body case 6 attached to the printer main body 2. These guide pins regulate the movement of the fixed blade mounting plate 41 in the front-rear direction.

  The rear end portion of the fixed blade mounting plate 41 is a bent portion 41d in which a portion other than the elongated hole 41c is bent at a right angle downward. Between the bent portion 41d and the spring receiver 33a formed on the upper end of the side plate 33 located on the rear side of the right end portion (opposite side of the long hole 41c) of the bent portion 41d, in a compressed state, A fixed blade pressing spring 42 is arranged. Therefore, the fixed blade mounting plate 41 spanning the upper ends of the left and right swiveling plates 35 and 36 is always urged forward by a predetermined spring force. Fixed blades 21 arranged in the printer width direction are fixed to the back surface of the front end portion of the fixed blade mounting plate 41 with the blade edge 21a in a horizontal posture facing forward.

  On the other hand, the opening / closing lid unit 3 attached to the front side of the printer main body 2 has a front plate portion 51 extending in the printer width direction and a narrow width that is bent at right angles from the left and right edges of the front plate portion 51 to the rear of the printer. Side plate portions 52 and 53 are provided. The front surface of the front plate portion 51 is an inclined surface slightly inclined toward the rear of the printer. Here, the movable blade 22 of the recording paper cutting device 20 is positioned in the printer width direction with the blade edge 22a facing upward. Is arranged. A support shaft 54 is fixed to the upper corner of the left side of the front plate portion 51 (on the side plate portion 52 side), and the movable blade 22 can pivot in the vertical direction along the front surface of the front plate portion 51 around this. It is. Here, the end 22b on the recording paper cutting start side of the cutting edge 22a of the movable blade 22 is in a state of being ridden in advance from the front with respect to the end 21b on the same side of the cutting edge 21a of the fixed blade 21.

  The movable blade drive mechanism 23 for turning the movable blade 22 up and down includes a drive motor 24 attached to the front plate portion 51, a worm 26 that is rotationally driven by the drive motor 24 via a reduction gear train 25, A worm wheel 27 meshing with the worm 26 is provided. A drive pin 28 is attached to the worm wheel 27, and the drive pin 28 is slidably inserted into an elongated pin guide hole 29 formed in the movable blade 22.

(Operation of recording paper cutting device)
When the worm wheel 27 rotates in the direction shown by the arrow 27a from the state shown in FIG. 4, the movable blade 22 connected via the drive pin 28 turns upward about the support shaft 54 at the left end thereof. The cutting edge 22 a of the movable blade 22 is in a state in which the end 22 b on the recording paper cutting start side has run over the cutting edge 21 a of the fixed blade 21 in advance. Therefore, when the movable blade 22 turns upward, the contact position between the blade edge 22a of the movable blade and the blade edge 21a of the fixed blade moves from the end on the recording paper cutting start side toward the other end on the recording paper cutting end side.

  Here, the blade edge 21a of the fixed blade 21 is inclined so as to slightly protrude forward from the recording paper cutting start end toward the recording paper cutting end end. On the other hand, the blade edge 22a of the movable blade 22 extends in the printer width direction. Therefore, the movable blade 22 turns while the fixed blade 21 is slightly pushed backward by the blade edge 22a. As a whole, the fixed blade 21 is movable along an arc-shaped trajectory that extends substantially in the front-rear direction of the printer about the support shafts 37 and 38, and is always urged forward by a fixed blade pressing spring 42. Therefore, the contact positions of the blade edges 21a and 22a are always in a point contact state, and this contact position moves from the recording paper cutting start end to the recording paper cutting end edge as the movable blade 22 turns. As the point contact positions of the two blade edges 21a and 22a move in this way, the portion of the recording paper 10a at the point contact positions is cut in the printer width direction.

  Here, the fixed blade pressing spring 42 of this example urges the fixed blade 21 at a position deviated outside the cutting end of the cutting edge 21 a of the fixed blade 21. Forces indicated by arrows F <b> 1 and F <b> 2 in FIGS. 5 and 6 act on the fixed blade 21. When the urging position of the fixed blade 21 is not the position as in this example but is located between the recording paper cutting start end and the cutting end end, the contact position of the blade edges 21a and 22a is the urging position. Before and after, the direction of the rotational moment due to the forces F1 and F2 acting on the fixed blade 21 is reversed, and the fixed blade 21 may shift back and forth around the biased position or the contact position of both blades when switching. is there. If the fixed blade 21 rattles in the middle of the cutting of the recording paper in this way, there arises a problem such as the cutting line being disturbed. In this example, since the urging position is a position outside the cutting range, it is possible to prevent the occurrence of such adverse effects.

(Fixed blade retraction mechanism)
Here, in this example, a fixed blade retracting mechanism for retracting the fixed blade 21 to the rear side of the printer against the urging force in conjunction with the opening of the opening / closing lid unit 3 is provided. The fixed blade retracting mechanism of this example will be described with reference to FIG. Fig.7 (a) is a perspective view of the state which opened the opening-and-closing lid unit 3, FIG.7 (b) is the side view. The fixed blade retracting mechanism 70 of the present example is attached to the engaging pin 71 attached to the lower end portion of the left side plate portion 52 of the opening / closing lid unit 3 and the lower end portion of the left turning plate 35 supporting the fixed blade 21. And an engaging leaf spring 72.

  The engaging pin 71 protrudes horizontally in the printer width direction at a position substantially behind the rotation fulcrum 3 a in the side plate portion 52. The engagement plate spring 72 extends from the lower end portion of the swivel plate 35 in a direction inclined downward and forward of the printer. The lower end portion of the engagement plate spring 72 is bent rearward of the printer and becomes a bent portion 72a that is pressed from below by the engagement pin 71. ing. The contact position of the engagement pin 71 with respect to the bent portion 72 a is a position in front of the support shaft 37 of the swivel plate 35.

  When the opening / closing lid unit 3 in the closed position shown in FIG. 4 is opened, as shown in FIGS. 5 and 6, the engaging pin 71 pivots upward about the fulcrum 3a, and the bent portion 72a of the engaging leaf spring 72 is rotated. While pushing up the lower surface portion, it slides along the lower surface portion. As a result, the swivel plate 35 is forcibly swung downward about the support shaft 37, and the fixed blade 21 supported by the fixed blade mounting plate 41 attached to the upper end of the swivel plate 35 moves backward as a whole, and the recording paper Move away from the outlet 5. When the opening / closing lid unit 3 is fully opened as shown in FIG. 7, the blade edge 21 a of the fixed blade 21 is sufficiently from the front edge portion of the top plate portion 6 a of the main body case 6 defining the recording paper discharge port 5. The position is set back to. Therefore, when the operator performs an operation of replacing the roll paper 10 with the opening / closing lid unit 3 open, it is possible to prevent such an adverse effect that a fingertip or the like touches the blade edge 21a of the fixed blade 21 and is injured.

(Operational effect of the roll paper printer of this embodiment)
In the roll paper printer 1, the fixed blade 21 is disposed substantially horizontally on the printer body 2 side, and the movable blade 22 is disposed substantially vertically on the opening / closing lid unit 3 side. Accordingly, it is basically only necessary to secure a space for horizontally arranging the fixed blade 21 in the upper end portion of the printer body 2 to which the fixed blade 21 is attached. Therefore, as compared with the case where the fixed blade 21 and the movable blade 22 are opposed to each other along the vertical direction of the printer, an increase in the vertical dimension of the printer main body 2 can be suppressed, and the compact roll paper printer 1 has a small height. Can be realized.

  Further, since the blade edges 21a and 22a are brought into contact with each other from a substantially orthogonal direction, the contact state of both the blade edges can be formed at an appropriate contact angle without warping the fixed blade 21 and the movable blade 22. Therefore, it becomes easy to manufacture the double-edged blade, and it is possible to reduce the manufacturing cost and improve the manufacturing quality.

  Furthermore, the fixed blade 21 and the movable blade 22 are in contact with each other in the direction orthogonal to the recording paper 8a, unlike the case where both the blade edges 21a and 22a are in contact with each other in the state where they are overlapped in the thickness direction. Even when the movable blade 22 stops in the middle of cutting, there is a problem that the opening / closing lid unit 3 cannot be opened due to the engagement of the fixed blade 21 and the movable blade 22 that intersect each other in an overlapping state. Does not occur.

  Furthermore, since the fixed blade 21 attached to the printer main body 2 is retracted in conjunction with the opening operation of the opening / closing lid unit 3, the operator's fingertip is the cutting edge of the fixed blade 21 when the opening / closing lid unit 3 is opened. It is also possible to avoid adverse effects such as injury by touching 21a.

  DESCRIPTION OF SYMBOLS 1 Thermal printer, 2 Printer main body, 3 Opening / closing lid unit, 3A Closed position, 3B open position, 5 Recording paper discharge port, 6 Main body case, 6a Top plate part, 7 Opening / closing lid case, 9 Roll paper storage part, 10 Roll paper , 15 Platen roller, 16 thermal head, 20 recording paper cutting device, 21 fixed blade, 21a blade edge, 22 movable blade, 22a blade edge, 23 movable blade drive mechanism, 35, 36 swivel plate, 37 spindle, 41 fixed blade mounting plate , 70 Fixed blade retracting mechanism, 71 engaging pin, 72 engaging leaf spring.

Claims (4)

The printer itself,
An open / close lid unit attached to the printer body so as to be openable and closable;
A fixed blade attached to the printer body side, a movable blade attached to the open / close lid unit, and a recording paper cutting device provided with a movable blade drive mechanism attached to the open / close lid unit ,
The opening / closing lid unit can be opened from a closed position standing vertically to an open position opened by a predetermined angle forward or rearward of the printer with the lower end portion as a center,
The movable blade of the recording paper cutting device is a front plate portion provided in the opening / closing lid unit in a state where the opening / closing unit is in a closed position, and a blade edge is directed upward at an upper end portion of the opening / closing lid unit. Arranged in the vertical direction in the printer width direction,
The fixed blade is attached to the printer body so as to be movable in a first direction in which the cutting edge faces and a second direction opposite to the first direction, and is urged in the first direction by an urging member. Is arranged in the printer width direction in a horizontal posture at the upper end portion of the printer body facing the upper end portion of the opening / closing lid unit in the closed position,
In a state where the opening / closing lid unit is in the closed position, the movable blade and the fixed blade of the recording paper cutting device are in a state of being orthogonal to each other, and the cutting edge of the movable blade is moved by the urging force of the urging member. It is in a state of contacting the cutting edge of the fixed blade on the side of the paper cutting start edge,
The movable blade drive mechanism moves the movable blade toward the paper cutting start side so that the contact position between the blade edge of the fixed blade and the blade edge of the movable blade moves toward the end of paper cutting at these blade edges. It is designed to swivel along the front plate portion around the end of
The printer according to claim 1, wherein when the movable blade rotates, the fixed blade is moved in the second direction against the urging force of the urging member by the movable blade. In claim 1,
The urging position of the fixed blade by the urging member is a position deviated from the end of paper cutting at the blade edge of the fixed blade in the direction along the blade edge of the fixed blade, and is determined by the movable blade and the fixed blade. A printer characterized by being at a position outside the cutting range. In claim 1 or 2,
A printer having a fixed blade retracting mechanism for retracting the fixed blade in the second direction against the biasing force of the biasing member in conjunction with the opening operation of the opening / closing lid unit. . In any one of claims 1 to 3,
Inside the printer body, in a state where the open / close lid unit is in the closed position, a roll paper storage unit is formed which is surrounded by an arc-shaped paper guide, on the paper guide, and before the paper guide, A printer comprising the movable blade and the front of the paper guide .

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