JP2005254683A - Printer - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a printer with a scissor type cutting mechanism, an opening and closing frame of which can be closed with a small force without causing a single closing condition. <P>SOLUTION: The scissor type cutting mechanism 30 of a printer 1 has a fixed blade 31 mounted on a body frame 40 and a movable blade 32 mounted on the opening and closing frame 51. The fixed blade 31 is biased upward by a plate spring 91. The waiting position of the movable blade 32 is fixed so as to prevent the movable blade 32 from hitting the fixed blade 31 when the opening closing frame 51 is closed. When the movable blade 32 is moved from the waiting position, the projected portion 32b thereof runs upon an inclined guide way 311 from the fixed blade projected surface 31b, pushing the fixed blade 31 against the spring force, the point 32a of the movable blade gets into a point contact condition with the point 31a of the fixed blade and can slide. Since there is no need to close the opening and closing frame 51 while pushing the fixed blade 31 against the spring force, the opening and closing frame 51 can be closed with a small operating force without causing a single closing condition. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a printer such as a roll paper printer that opens and closes an open / close frame attached to a main body frame and replaces a recording paper roll, and more particularly, a saddle type for cutting recording paper to be discharged. The present invention relates to a printer having a recording paper cutting mechanism.

  In a printer, for example, a roll paper printer, a recording paper fed from a recording paper roll loaded in a recording paper roll storage unit is conveyed via a printing position, and desired printing is performed on the recording paper. The recording paper after printing is cut by a recording paper cutting mechanism disposed downstream of the printing position in the transport direction, and discharged as a receipt having a predetermined length. As a recording paper cutting mechanism, a scissors type is known. The scissor-type cutting mechanism has a fixed blade and a movable blade, and the movable blade moves so that the blade edge of the movable blade slides in a point contact state with respect to the blade edge of the fixed blade, and the recording paper positioned therebetween Is disconnected.

Here, in order to make it easy to replace the recording paper roll, the opening / closing frame is attached to the printer main body frame so that the opening / closing frame can be opened and closed, and the opening / closing lid of the storage section of the recording paper roll is attached to the opening / closing frame. And a printer having a configuration in which a recording paper conveyance path is formed between the main body frame and the opening / closing frame. In the printer having this configuration, as disclosed in Patent Document 1 below, the movable blade of the scissors-type cutting mechanism is mounted on the main body frame, and the fixed blade is mounted on the open / close frame. When the open / close frame is closed, the fixed blade hits the movable blade, and the recording paper passing between them can be cut. Further, in the vertical cutting mechanism, in order to form a point contact state between the fixed blade and the movable blade, the fixed blade is arranged in a direction orthogonal to the conveyance direction of the recording paper to be cut, generally in a horizontal direction, and is movable. The blade is slightly inclined with respect to the fixed blade. Furthermore, the movable blade and the fixed blade are pressed against each other with a predetermined force by an elastic member or the like.
Japanese Patent Laid-Open No. 9-131595

  In a printer provided with a conventional scissor-type cutting mechanism, a fixed blade is mounted on an open / close frame, and a cutting edge of a movable blade slides on the upper side of the fixed blade, that is, the opening direction side of the open / close frame. For this reason, when the cutting operation stops for some reason, the fixed blade mounted on the open / close frame remains positioned below the movable blade attached to the main body frame. Therefore, the opening / closing frame cannot be opened unless the movable blade is returned to the original position.

  Accordingly, it is conceivable to mount a fixed blade on the main body frame and mount a movable blade on the open / close frame so that the movable blade contacts the fixed blade from the opening direction side of the open / close frame. In this case, when the open / close frame is closed, the movable blade mounted on the open / close frame pushes the fixed blade urged by the elastic member so that the recording paper can be cut.

  However, in the printer with this configuration, when closing the open / close frame, it is necessary to push the open / close frame to the closed position against the elastic force of the elastic member urging the fixed blade and lock the open / close frame to the main body frame. . Therefore, a large operating force is required to close the open / close frame.

  Further, the locked state of the open / close frame is generally formed by latching latches disposed on both sides in the printer width direction to members such as a shaft on the main body frame side. Therefore, when the opening / closing frame has low rigidity, when the offset position of the opening / closing frame is pushed in, the opening / closing frame is bent and there is a risk of falling into a so-called one-closed state in which only the latch on one side is locked.

  In view of such a point, an object of the present invention is configured such that the movable blade mounted on the open / close frame contacts the fixed blade mounted on the main body frame from the opening direction side of the open / close frame. Another object of the present invention is to make it possible to close an open / close frame with a small operating force without falling into a single-closed state in a printer having a saddle type cutting mechanism.

  In order to solve the above problems, a printer of the present invention includes: a main body frame; an open / close frame supported in an openable / closable state on the main body frame; and a scissor-type cutting mechanism; Comprises a fixed blade mounted on the main body frame, a movable blade mounted on the open / close frame, and a biasing member that biases the fixed blade in the opening direction of the open / close frame. When the movable blade is moved from the standby position to the fixed blade side in the closed state, the blade edge of the movable blade can slide along the blade edge of the fixed blade in a point contact state to cut the recording paper. The standby position of the movable blade is set to a position that does not hit the fixed blade when the open / close frame is closed.

  In the printer of the present invention, when the open / close frame is closed, the movable blade mounted thereon does not hit the fixed blade that is urged in the opening direction by the urging member. Therefore, when the opening / closing frame is closed, it is not necessary to push the opening / closing frame against the urging force of the urging member. Therefore, the opening / closing frame can be easily closed with a small operating force. Further, since the force applied to the opening / closing frame when closing the opening / closing frame is small, even if the opening / closing frame is pushed in at an offset position, there is little risk of the opening / closing frame being bent and falling into a closed state.

  Here, in order to position the movable blade with respect to the fixed blade so that the recording paper can be cut, the movable blade that moves from the standby position toward the fixed blade is fixed. What is necessary is just to form the guide surface which leads to the state which got on the blade. The guide surface can be formed on the movable blade and / or the fixed blade. Further, the guide surface can be an inclined surface.

  Further, in order to slide the cutting edge of the movable blade in a point contact state with respect to the cutting edge of the fixed blade, the movable blade is disposed in a direction orthogonal to the conveyance direction of the recording paper to be cut, What is necessary is just to incline and arrange a fixed blade with respect to the said movable blade.

  Next, in a printer in which the open / close frame is attached to the main body frame so as to be openable / closable, a print head can be attached to the main body frame, and a platen for defining a print position can be attached to the open / close frame. In this case, a paper pressing roller is attached to the main body frame at a position above the print head, and when the opening / closing frame is closed, the paper is placed on the opening / closing frame so as to be in contact with the paper pressing roller. A feed roller can be attached. According to this configuration, when the opening / closing frame is opened, the platen and the paper feed roller are separated from the print head and the paper pressing roller on the main body frame side, so that the operation of arranging the recording paper between them becomes easy.

  Here, when a recording paper roll storage portion is formed on the main body frame side, an open / close lid for opening and closing the storage portion may be attached to the open / close frame.

  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 printer equipped with a scissors-type cutting mechanism according to the present embodiment, FIG. 2 is a schematic longitudinal sectional view thereof, and FIG. 3 is a schematic longitudinal sectional view in a state where an opening / closing lid is opened. FIG. 4 is a partially enlarged cross-sectional view showing a portion to which the scissor type cutting mechanism is attached.

  Referring to these drawings, the printer 1 includes a rectangular frame-shaped case body 2 that covers the four sides of the printer, a front opening / closing lid 3 that covers the front portion of the upper surface of the printer, and a rear opening / closing lid 4 that covers the rear portion. These constitute a printer case. A printer unit 11 is built in the printer case, and a recording paper discharge port 5 is formed between the open / close lids 3 and 4. When the slide button 6 is operated, the rear opening / closing lid 4 is released from its locking mechanism (not shown) and can be opened as shown in FIG. When the opening / closing lid 4 is opened, the storage section 8 for the recording paper roll 7 in the printer unit 11 is exposed, and the recording paper roll 7 can be replaced. When the front opening / closing lid 3 is opened, the ribbon cassette mounting portion 10 for detachably mounting the ribbon cassette 9 of the ink ribbon of the printer unit 11 is exposed so that the ribbon cassette 9 can be replaced.

  Next, the internal configuration of the printer will be described. A storage portion 8 for a recording paper roll 7 having an arc-shaped bottom surface opened upward when viewed from the side is formed in a rear portion of the printer unit 11. The recording paper 7 a drawn out from the recording paper roll 7 loaded here is guided to the recording paper conveyance path 15 via the guide roller 14 arranged at the front end portion of the storage portion 8. The recording paper conveyance path 15 includes a conveyance path portion 16 slightly inclined upward toward the front, a front inclination path portion 17 rising from the front end of the conveyance path portion 16 at a large inclination angle, A rear ramp portion 18 that is inclined rearward from the upper end of the front ramp portion 17 and connected to the recording paper discharge port 5 is provided. 2 and 4, the recording paper 7a is indicated by a one-dot chain line.

  The conveyance path portion 16 is defined by a conveyance guide 16a and a conveyance surface 16b facing the conveyance guide 16a. The subsequent forward slope portion 17 is defined by the head surface 20a of the dot impact type print head 20 and the platen 21 facing the print head 20 at a constant interval. It has become. The print head 20 is disposed so that the head surface 20a faces rearward and faces upward. Corresponding to the inclination of the print head 20, the surface of the platen 21 is arranged in a state inclined downward toward the front. The print head 20 is mounted on a head carriage 22, and the head carriage 22 can reciprocate in the width direction along the carriage guide shaft 23.

  A mounting portion 10 for the ribbon cassette 9 is formed on the upper side of the head carriage 22. The mounting portion 10 is also inclined and arranged so as to be directed upward toward the rear. Accordingly, the ink ribbon 9a of the ribbon cassette 9 mounted here can be set between the print head 20 and the platen 21 so as to be parallel to them.

  A rear ramp portion 18 that is continuous with the front ramp portion 17 is defined by a conveyance guide 28 that extends in a direction bent rearward from the upper end of the platen 21. A paper feed mechanism including a paper feed roller 25, a paper press roller 26, and a torsion bar 27 as a biasing member that biases the paper press roller 26 toward the paper feed roller 25 is provided in the rear inclined path portion 18. Is arranged. The paper feed roller 25 is disposed on the rear side of the rear inclined portion 18, and the paper pressing roller 26 is supported on the front side so as to be movable in a direction approaching the paper feed roller 25 with respect to the roller mounting plate 29. The torsion bar 27 is biased toward the paper feed roller 25 by the spring force.

  The recording paper 7 a pulled out from the recording paper roll 7 is sandwiched between the paper feeding roller 25 and the paper pressing roller 26, and is conveyed along the conveying path 15 by rotating the paper feeding roller 25 by a driving source (not shown). Is done. In this example, the platen 21 and the conveyance guide 16a continuous below the platen 21 are formed by a single platen frame 55, and the conveyance guide 28 is attached to the upper end portion of the platen frame 55. .

  Next, a scissor-type cutting mechanism 30 for cutting the recording paper is disposed in the vicinity of the recording paper discharge port 5. The scissor-type cutting mechanism 30 includes a fixed blade 31 disposed on the front side, a movable blade 32 disposed on the rear side, and a drive mechanism 33 for operating the movable blade 32 across the recording paper conveyance path. ing. The movable blade 32 and the drive mechanism 33 are built in the case 34. The recording paper 7a between the fixed blade 31 and the movable blade 32 is cut by sliding the blade edge 32a of the movable blade 32 on the upper surface side of the blade edge 31a of the fixed blade 31 in a point contact state. Further, a cutting blade 35 capable of cutting the recording paper by manual operation is attached to the front edge portion of the recording paper discharge port 5.

(Printer unit)
FIG. 5 is a perspective view showing the printer unit 11 built in the printer case, and FIG. 6 is a perspective view showing a state in which the open / close side unit is opened. The printer unit 11 includes a fixed side unit 12 and an open / close side unit 13, and the open / close side unit 13 is supported by the fixed side unit 12 so as to be rotatable up and down around the rear end portion.

  In the printer unit 11 of this example, when the opening / closing lid 4 of the storage unit 8 of the recording paper roll is opened in order to easily perform the replacement operation of the recording paper roll 7, the recording paper conveyance having the above-described configuration is performed. The path 15 is also configured to be in an open state. For this purpose, the component on one side constituting the recording paper conveyance path 15 is attached to the fixed side unit 12, and the opening / closing lid 4 and the conveyance path 15 are constituted on the opening / closing side unit 13 which is the moving side. When the other side component is attached and the opening / closing unit 13 is opened, the storage portion 8 of the recording paper roll 7 is opened and the recording paper conveyance path 15 is also opened.

  More specifically, the recording unit 8 for the recording paper roll, the conveyance surface 16b of the conveyance path portion 16, the print head 20, the paper pressing roller 26, and the fixed blade 31 of the automatic cutting unit 30 are attached to the fixed side unit 12. Yes. On the other hand, the open / close side unit 13 includes a platen frame 55 (conveyance guide 16a, platen 21) and a guide plate 28 that define the conveyance path portion 16, the front ramp portion 17 and the rear ramp portion 18, and The paper feed roller 25, the movable blade 32 of the scissors-type cutting mechanism 30, and the drive mechanism 33 are attached. Further, as shown in FIG. 3, an opening / closing lid 4 is also attached.

  As can be seen from FIGS. 3 and 6, when the opening / closing unit 13 is fully opened, the recording paper roll 7 can be loaded by a simple operation of dropping the recording paper roll 7 into the storage unit 8 from above. In addition, since the transport path 15 is in an open state, the operation of placing the recording paper 7a pulled out from the recording paper roll 7 along the transport path 15 is extremely simple. Further, when the opening / closing unit 13 is closed and returned to the state shown in FIGS. 2, 4, and 5, the recording paper 7 a is placed between the print head 20 and the platen 21, and between the paper feed roller 25 and the paper pressing roller 26, And the state pulled out from the recording paper discharge port 5 through the fixed blade 31 and the movable blade 32 of the automatic cutting unit 30 is automatically formed.

  Next, the structures of the fixed side unit 12 and the open / close side unit 13 will be described in more detail. First, the fixed side unit 12 includes a main body frame 40, and a carriage guide shaft 23 is stretched across the front side portion of the main body frame 40 in the width direction. As described above, the head carriage 22 on which the print head 20 is mounted is supported on the carriage guide shaft 23 so as to be capable of reciprocating. A ribbon frame 41 is attached so as to cover the head carriage 22 and the print head 20, and an outer peripheral portion of the ribbon frame 41 serves as a mounting portion 10 of the ribbon cassette 9.

  A storage portion 8 for loading the recording paper roll 7 is formed at a rear portion of the main body frame 40, and a rotation center shaft 43 extending in the width direction is formed at the rear end portion of the storage portion 8. 40. The rotation center shaft 43 is the rotation center of the opening / closing unit 13.

  On the other hand, the open / close side unit 13 has an open / close frame 51. The open / close frame 51 has a front end that connects left and right arm portions 52, 53 extending in the front-rear direction and front end portions of the arm portions 52, 53. And a connecting plate portion 54. The rear end portions of the left and right arm portions 52 and 53 are rotatably supported by both end portions of the rotation center shaft 43. A platen frame 55 is attached to the front end of the front end connecting portion 54 of the open / close frame 51, and a paper feed roller shaft 25 a is attached to the back side of the platen frame 55. A guide plate 28 attached to the platen frame 55 is attached to the guide plate 28. From the formed openings 28a, 28a, the outer peripheral surfaces of the two paper feed roller bodies 25b, 25b fixed coaxially to the paper feed roller shaft 25a protrude forward. On the front end connecting plate portion 54 of the opening / closing frame 51, the movable blade 32 and the drive mechanism 33 of the scissors-type cutting mechanism 30 are mounted.

(鋏 type cutting mechanism)
Next, FIG. 7 is a partial elevational view when the attachment portion of the fixed blade 31 of the vertical cutting mechanism 30 mounted on the fixed side unit 12 is viewed from the rear side of the printer. FIG. 8 is a perspective view of the roller mounting plate 29 to which the fixed blade 31 and the like are mounted as viewed from the rear side of the printer. FIG. 9 is a perspective view showing the fixed blade 31 and the leaf spring.

  With reference to these drawings, first, the support structure of the fixed blade 31 in the scissors-type cutting mechanism 30 will be described. The roller mounting plate 29 to which the fixed blade 31 is mounted includes a guide plate portion 61 facing the guide plate 28 substantially in parallel. The upper end of the guide plate portion 61 is bent forward of the printer and extends horizontally. The horizontal plate portion 62 is continuous. Further, a vertical plate portion 63 that is bent upward and extends vertically is continued at the front end of the horizontal plate portion 62, and a cutting blade that is bent rearward of the printer and extends horizontally at the upper end of the vertical plate portion 63. The holding plate portion 64 is continuous. The rear end portion of the cutting blade holding plate portion 64 is bent obliquely rearward, and the cutting blade 35 is integrally formed at the upper end of this portion. In the roller mounting plate 29 having this configuration, both end portions of the horizontal plate portion 62 are bridged over the upper end portions of the left and right rear end plate portions 44 and 45 of the main body frame 40 in the fixed side unit 12, It is fixed.

  A leaf spring 91 is attached to the upper surface of the horizontal plate portion 62 of the roller attachment plate 29. In this example, both ends of the leaf spring 91 are fixed to the horizontal plate portion 62 by fixing screws 92a and 92b. The leaf spring 91 is formed by bending up leaf spring portions 91a and 91b extending obliquely upward and leftward from the center in the width direction. Both the leaf spring portions 91a and 91b are formed to have the same length, but the height of the bent end portion is higher in the left leaf spring portion 91a. The fixed blade 31 is supported on the leaf spring 91.

  Next, the shape of the fixed blade 31 will be described. The fixed blade 31 has a blade edge 31a at the upper edge portion of the end surface facing the rear side of the printer. An inclined guide surface 311 that is inclined downward toward the rear and side of the printer is formed at a portion continuous to the right end of the blade edge 31a. A protruding surface 31b that protrudes with a constant width is formed on the rear side of the printer at a portion of the inclined guide surface 311 that is continuous to the right end of the cutting edge 31a. The protruding surface 31b is also an inclined surface slightly inclined downward toward the rear side of the printer. At both ends of the end surface portion on the opposite side of the fixed blade 31, latching projections 31c and 31d protrude outward. Here, fixed blade support pieces 91c and 91d are cut and raised vertically at both ends of the leaf spring 91, respectively. Latching projections 31c and 31d of the fixed blade 31 are supported on L-shaped support surfaces formed on the fixed blade support pieces 91c and 91d, respectively.

  On the other hand, a pair of left and right projections 31e and 31f projecting forward from the printer are formed from both end portions of the end surface of the fixed blade 31 on the front side of the printer. In the vertical plate portion 63 of the roller mounting plate 29, slits 63a and 63b (see FIGS. 5 and 6) into which the protrusions 31e and 31f are inserted are formed. The protrusions 31e and 31f are gradually reduced in thickness toward the leading end side (front side of the printer). On the other hand, the widths of the slits 63a and 63b are constant. Therefore, the fixed blade 31 is attached to the vertical plate portion 63 in a state where the blade edge 31a side can be turned up and down.

  Here, the left slit 63a is formed at a position higher than the right slit 63b. Therefore, since the protrusion 31e on the fixed blade 31 is higher than the protrusion 31f (see FIG. 4), the fixed blade 31 as a whole is attached to the vertical plate portion 63 in an inclined posture slightly inclined downward from the left side to the right side. ing. As described above, since the leaf spring portion 91a on the left side of the leaf spring 91 is higher than the leaf spring portion 91b on the right side, the fixed blade 31 is biased upward while maintaining an inclined posture with a constant spring force as a whole. Yes.

  FIG. 10 is an explanatory view showing a moving state of the fixed blade 31 by the movable blade 32. As shown in FIGS. 5 and 10A, the movable blade 32 is rotated by the drive mechanism 33 between the standby position indicated by the solid line and the cutting end position indicated by the imaginary line, with the vertical axis 32b at the right end as the center. Can be made. As described above, the lower edge portion of the end surface of the movable blade 32 on the printer front side is the blade edge 32a. In a state in which the open / close side unit 13 (open / close frame 51) is closed, a portion 32c continuous to the right end of the blade edge 32a of the movable blade is located above the protruding surface 31b of the fixed blade 31 (on the opening direction side of the open / close frame 51). The standby position of the movable blade 32 is set so that the movable blade 32 does not contact the fixed blade 31.

  Therefore, when the open / close side unit 13 is closed, as shown in FIGS. 10A, 10 </ b> B, and 10 </ b> C, the protruding portion 32 c is positioned above the protruding surface 31 b of the fixed blade 31, and the movable blade 32 is It is slightly separated from the fixed blade 31. Therefore, since the movable blade 32 on the side of the open / close frame 51 does not hit the fixed blade 31, it is not necessary to push in the open / close side unit 13 while pushing the fixed blade 31 against the urging force of the leaf spring 91. As a result, the opening / closing unit 13 can be locked at the closed position with a small operating force. Further, even when the offset position of the open / close lid 4 is pushed in, the force acting on the open / close frame 51 when closing the open / close side unit 13 is small, so there is a risk that the open / close frame 51 is bent and a single-closed state occurs. Few.

  Next, the clearance gap between the protrusion surface 31b of the fixed blade 31 and the lower surface of the protrusion part 32c of the movable blade 32 located on the upper side is narrow. Therefore, when the movable blade 32 is moved from the standby position toward the cutting end position by the drive mechanism 33, the lower surface of the portion 32c of the movable blade 32 hits the protruding surface 31b which is an inclined surface, and rides on this. Then, it rides on the inclined guide surface 311 that is continuous with the protruding surface 31b. As a result, the fixed blade 31 is pushed against the spring force by the movable blade 32, the cutting edge 32a of the movable blade 32 rides on the cutting edge 31a of the fixed blade 31 from the right end side (rotation center side), and both are predetermined. A point contact is made with the pressing force (positioning state in which the recording paper can be cut). Thereafter, as the movable blade 32 turns to the fixed blade 32 side, those contact points move to the left side.

  Here, the movable blade 32 turns on a horizontal plane. On the other hand, the fixed blade 31 is held in a posture slightly inclined upward toward the left side, and is attached to the vertical plate portion 63 so as to be rotatable up and down around the lower edge 31g of the front end surface of the printer. The plate spring 91 is always biased upward. Therefore, when these contact points move to the left side as the movable blade 32 turns, as shown in FIGS. 10D and 10E, the portion on the blade tip 32a side of the fixed blade 31 is pushed downward. When the movable blade 32 reaches the cutting end position, the fixed blade 31 is held in an inclined state below the movable blade 32. Thus, the contact point of both blades moves horizontally from the right side to the left side, so that the recording paper 7a is cut horizontally. That is, it is cut in a direction orthogonal to the transport direction.

  When turning of the movable blade 32 is stopped for some reason while the movable blade 32 is in the middle of cutting, that is, with the movable blade 32 and the fixed blade 31 intersecting, the movable blade 32 is opened and closed without returning to the standby position. The side unit 13 can be opened. That is, the movable blade 32 mounted at the tip of the open / close frame 51 of the open / close side unit 13 is on the upper side (the opening direction side of the open / close frame 51) with respect to the fixed blade 31 mounted on the main body frame 40 side. Abut. Therefore, even when the movable blade 32 intersects the fixed blade 31, the open / close side unit 13 can be opened as it is. Therefore, it is possible to quickly and easily perform a recovery operation such as when the movable blade 32 stops in the middle of cutting.

  Although the above example relates to a printer having a dot impact type print head, the present invention can be similarly applied to a printer using an ink jet head as the print head. Furthermore, the present invention can be applied to a printer using a contact type print head such as a thermal head. In the above example, the paper feed roller and paper pressing roller that make up the transport mechanism are located above the print head, but the transport mechanism is located below the print head (upstream of the transport path). Even in such a case, the present invention can be similarly applied.

1 is an external perspective view of a printer to which the present invention is applied. It is a schematic longitudinal cross-sectional view of the printer of FIG. It is a schematic longitudinal cross-sectional view in the state which opened the opening-and-closing lid | cover in the printer of FIG. It is a partial expanded sectional view which expands and shows the part of the scissors type cutting mechanism of the printer of FIG. FIG. 2 is a perspective view showing a printer unit built in the printer of FIG. 1. FIG. 6 is a perspective view showing a state where the open / close side unit is opened in the printer unit of FIG. 5. FIG. 2 is a partial elevational view when a portion to which a fixed blade is attached in the printer of FIG. 1 is viewed from the printer rear side. It is a perspective view at the time of seeing the part shown in FIG. 7 from the printer rear side. It is a perspective view which shows the fixed blade and leaf | plate spring of FIG. It is explanatory drawing which shows operation | movement of the scissors type cutting mechanism in the printer of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Printer, 4 Opening / closing lid, 5 Recording paper discharge port, 7 Recording paper roll, 8 Recording paper roll storage part, 9 Ribbon cassette, 10 Ribbon cassette mounting part, 11 Printer unit, 12 Fixed side unit, 13 Opening / closing side unit , 15 Recording paper transport path, 16 transport path section, 17 forward ramp path section, 18 rear ramp path section, 20 print head, 20a head surface, 21 platen, 25 paper feed roller, 26 paper press roller, 27 torsion bar, 29 Roller mounting plate, 61 guide plate portion, 62 horizontal plate portion, 63 vertical plate portion, 64 cutting blade holding plate portion, 30 vertical cutting mechanism, 31 fixed blade, 31a blade edge, 31b protruding surface, 311 inclined guide surface, 32 movable Blade, 32a Blade tip, 32c Protruding portion, 33 Drive mechanism, 35 Cutting blade, 40 Body frame, 43 Rolling central axis, 43a central axis 51 closing the frame, 52, 53 left and right arms, 54 front connecting plate portion, 91 a leaf spring, 91a, 91b plate spring portion

Claims (6)

Body frame,
An open / close frame supported by the main body frame in an openable / closable state;
A scissors-type cutting mechanism,
The scissor-type cutting mechanism includes a fixed blade mounted on the main body frame, a movable blade mounted on the open / close frame, and a biasing member that biases the fixed blade in the opening direction of the open / close frame. When the movable blade is moved from the standby position to the fixed blade side with the open / close frame closed, the blade edge of the movable blade slides along the blade edge of the fixed blade in a point contact state. The recording paper can be cut,
The printer is configured such that the standby position of the movable blade is set to a position that does not contact the fixed blade when the open / close frame is closed. In claim 1,
A guide surface that guides the movable blade that moves from the standby position to the fixed blade on the fixed blade;
The guide surface is a printer formed on the movable blade and / or the fixed blade. In claim 2,
The printer wherein the guide surface is an inclined surface. In claim 3,
The movable blade extends in a direction orthogonal to the conveyance direction of the recording paper to be cut,
The fixed blade is a printer arranged to be inclined with respect to the movable blade. In claim 4,
A print head attached to the body frame;
A platen attached to the opening and closing frame;
A paper pressing roller attached to a position above the print head in the main body frame;
A printer having a paper feed roller attached to the open / close frame so that when the open / close frame is closed, the open / close frame comes into contact with the paper press roller. In claim 5,
A storage section of a recording paper roll formed on the side of the main body frame;
It has an open / close lid for opening and closing this storage part,
The open / close lid is a printer attached to the open / close frame.

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