JP6698801B2 - Printer - Google Patents

Description

  The present invention relates to a printer, and more particularly, to a printer having a function of printing desired information such as characters, symbols, figures or bar codes on a print medium such as a label.

  The label printer, for example, while feeding the continuous paper wound in a roll into a sheet and conveying the continuous paper along a conveying path, a plurality of labels temporarily attached to a long-sized mount forming the continuous paper are provided. The printer has a function of printing desired information on each printer.

  In the label printer, a damper unit that applies tension to the continuous paper is installed between the paper supply unit that supplies the continuous paper and the thermal head that prints desired information on the label of the continuous paper. The continuous paper fed from the unit is conveyed to the thermal head via the damper unit.

  It should be noted that a printer having such a label printing function is disclosed in, for example, Japanese Patent Application Laid-Open No. 2004-242242.

JP, 2007-301869, A

  However, since the above-mentioned damper section is installed near the bottom surface of the housing of the printer, it is necessary to pass the continuous paper drawn from the paper supply section under the damper section near the bottom surface of the housing where it is difficult to work. Further, since the gap through which the continuous paper is passed, that is, the gap between the damper section and the bottom surface of the printer casing is narrow, it is difficult to pass the continuous paper. Further, since the width adjustment guide unit for adjusting the width of the continuous paper is mounted on the back side of the damper unit (opposite to the bottom surface of the printer case), the continuous paper is adjusted when the continuous paper is inserted. May get caught in. Due to these, there is a problem that it is difficult to insert the continuous paper into the transport path of the printer.

  The present invention has been made in view of the above technical background, and an object of the present invention is to provide a printer capable of facilitating an operation of inserting a print medium into a medium carrying path of the printer.

According to an aspect of the present invention, a print head that includes a conveying unit that conveys a print medium and a printing unit that performs printing on the print medium, and that can be opened and closed so that the printing unit is separated from and close to the conveying unit. Section, a sheet contact section that can be opened and closed on the upstream side in the conveying direction of the printing unit, a first support that is provided with the print head section and is swingably supported, and the sheet contact section. And a second support body that is swingably supported, and when the first support body is swung so that the print head unit closes, the second support body moves to the first support body. The paper contact portion is closed by being pressed by the support member 1 and swinging, and an ink ribbon portion for supplying and winding an ink ribbon is provided above the print head portion. Provided.

According to this, in the state where the print head unit and the opening/closing unit are opened, the work of inserting the print medium into the medium transport path of the printer is facilitated, and when the print head unit is closed, the opening/closing unit is closed. It is possible to prevent forgetting to close the opening/closing portion after inserting the sheet into the medium conveyance path of the printer.

1 is an overall perspective view of the external appearance of a printer according to an embodiment of the present invention. FIG. 2 is a perspective view showing the inside of the printer of FIG. 1. 3 is a side view of the printer of FIG. 2. FIG. FIG. 3A is an enlarged perspective view of the printing portion when the print head portion in FIG. 3 is closed, seen from the front, and FIG. 3B is an enlarged perspective view when the printing portion of the print head portion in FIG. It is a figure. It is the expansion perspective view which looked at the printing part of Drawing 4 (a) from the back side. FIG. 4 is an enlarged side view of the printing unit in FIG. 3. FIG. 7 is a perspective view of the print head portion of FIG. 6 taken out and viewed from the lower side. FIG. 6 is an enlarged side view of the printing unit when the printing head unit is in a closed state. FIG. 6 is an enlarged side view of the print unit when the print head unit is open. FIG. 6 is a side view showing a head support plate and a damper support member when the print head unit is opened and closed. 10A is a side view of the head support plate and the damper support member when the print head unit is closed in FIG. 10, and FIG. 10B is a side view of the head support plate and the damper support member when the print head unit is open in FIG. It is a figure. FIG. 6 is a perspective view of a damper unit and a damper support member viewed from the side surface side of the printing unit in FIG. 5. It is an exploded perspective view of a damper support member seen from the side where a damper part is attached. FIG. 14A is a perspective view showing a connecting portion between the outer damper portion and the damper supporting member in FIG. 12, and FIG. 14B is an exploded view showing a connecting positional relationship between the outer damper portion and the damper supporting member in FIG. It is a perspective view. (A) is the perspective view which looked at the damper part and the damper support member from the slanting upper part, (b) is the perspective view which looked at the damper part from the slanting lower part. It is the perspective view which looked at a damper part and a damper support member from the upper part. It is an exploded perspective view of an outer damper part. It is an exploded perspective view of an outer damper part and an inner damper part. (A) is an enlarged side view of the damper part when the continuous paper of the front wrap label is inserted, and (b) is an enlarged side view of the damper part when the continuous paper of the back wrap label is inserted. (A) is a side view of the damper part at the stage before the continuous paper is inserted into the paper feeding route, and (b) is the case of the front-winding label, in which the continuous paper roll in the paper supply unit is reduced and the continuous roll paper is used. A side view of the damper part when the outer peripheral part of the paper is close to the support shaft, (c) is a side view of the damper part at the stage when the roll-shaped continuous paper in the paper supply part starts to decrease in the case of the back-wrap label It is a figure. FIG. 7A is a side view of the damper unit at the initial stage when the roll-shaped continuous paper of the paper supply unit is the case of the front-winding label, and FIG. FIG. 6 is a side view of the damper unit at a stage where the continuous paper is reduced and the outer peripheral portion of the roll-shaped continuous paper approaches the support shaft. FIG. 3 is a perspective view of the outer damper part as seen from the front side of the printer. It is the perspective view which extracted and showed the outer damper part from FIG. It is the perspective view which extracted and showed the width adjustment guide part and the guide operation part 28 from FIG. FIG. 6 is a perspective view showing a connecting portion between a width adjusting guide portion and a guide operating portion. FIG. 6 is a perspective view of an engaging portion between a shaft portion of the guide operating portion and a width adjustment guide portion.

  Hereinafter, an embodiment as an example of the present invention will be described in detail with reference to the drawings. In addition, in the drawings for describing the embodiments, the same components are denoted by the same reference symbols in principle, and repeated description thereof will be omitted.

  Further, the direction in which a continuous paper (print medium) is conveyed for printing, specifically, the direction in which the continuous paper is fed from the paper supply unit to the thermal head unit is called the printing direction. Means the upstream side in the printing direction, and the downstream side in the transport direction means the downstream side in the printing direction.

  FIG. 1 is an overall perspective view of the external appearance of the printer according to this embodiment.

  The printer 1 of the present embodiment has, for example, a label printing function of printing information such as characters, symbols, figures, or barcodes on a label temporarily attached to a mount.

  An operation panel unit 3, a power switch 4, and an issuing port (medium ejecting port) 5 are provided on a front cover unit 2 on the front of the printer 1.

  The operation panel unit 3 includes an LCD (Liquid Crystal Display) for displaying messages and the like, a plurality of keys (line keys, feed keys, function keys, direction keys, cancel keys, etc.) for operating the operation of the printer 1, and A plurality of LEDs (Light Emitting Diodes) indicating the state of the printer 1 are arranged.

  An open cover portion 6 is attached to one side surface of the printer 1 so as to be vertically openable and closable by two hinge portions 7.

  Next, the internal structure of the printer 1 will be described with reference to FIGS. 2 and 3. 2 is a perspective view showing the inside of the printer of FIG. 1, and FIG. 3 is a side view of the printer of FIG. In the following description, the front side (front cover part 2 side) of the printer 1 is the front side (downstream side in the continuous paper conveyance direction), and the rear side (back cover part side) opposite thereto is the rear side (continuous paper conveyance direction upstream). Side).

  Inside the printer 1, a paper supply unit (medium supply unit) 10 arranged behind the printer 1, a printing unit 11 arranged in the front, and an ink ribbon unit 12 arranged above it are installed. ..

  The paper supply unit 10 is a component that supplies the continuous paper (print medium) P to the printing unit 11, and includes a support shaft 10a and a roll guide unit 10b installed at one end thereof.

  The support shaft 10a is a component that rotatably supports the continuous paper P wound into a roll. The roll guide portion 10b is a component that fixes the roll-shaped continuous paper P, and is movably installed along the axial direction of the support shaft 10a so that the position can be changed according to the width of the continuous paper P. ing.

  The continuous paper P has, for example, a long mount and a plurality of labels temporarily attached along the longitudinal direction at predetermined intervals. The surface of the mount that contacts the adhesive surface of the label is coated with a release agent such as silicone, so that the label can be easily released. In addition, position detection marks indicating the positions of the labels are formed at predetermined intervals along the longitudinal direction on the surface of the mount which is not labeled. The label may be either thermal paper or plain paper. In the case of thermal paper, a thermosensitive coloring layer that develops a specific color (black, red, etc.) when reaching a predetermined temperature region is formed on the surface of the thermal paper.

  Further, there are two types of continuous paper P, a front winding label and a back winding label. The front roll label is wound in a state in which the label of the continuous paper P is located on the outer peripheral surface of the roll-shaped continuous paper P, and as shown in FIG. 3, the continuous paper Ps (P: broken line) is the paper supply unit. It is fed from around the center in the height direction of 10 toward the bottom of the printing unit 11. On the other hand, the backside label is wound in a state where the label of the continuous paper P is positioned on the inner peripheral surface side of the roll-shaped continuous paper P, and as shown in FIG. : Solid line) extends from around the inner bottom surface of the printer 1 toward the bottom of the printing unit 11. The continuous paper P (Ps, Pb) has the same paper feed route in the printing unit 11 regardless of whether the front winding or the back winding is performed. In addition, the continuous paper P, whether the front-wrapped label or the back-wrapped label, is conveyed with the label temporarily attached surface (printing surface) facing upward.

  The printing unit 11 is a component that prints on a label or the like of the continuous paper P, and includes a print head unit 13, a support base 14 disposed below the print head unit 13, and the rear thereof (the continuous paper P during the printing process). And a damper unit 15 arranged upstream of the conveyance of the above.

  The print head unit 13 is installed inside the printer 1 in an openable and closable state, as described later. When the print head unit 13 is in the closed state, a paper passage route (medium conveying path) is formed between the print head unit 13 and the support base 14. Then, the paper feeding route is connected to the above-mentioned issuing port 5 (see FIG. 1).

  A head lock lever portion 16 that maintains the closed state of the print head portion 13 is installed on the support base 14. When the head lock lever portion 16 is operated, the closed state of the print head portion 13 is released, the front portion of the print head portion 13 is lifted, and the print head portion 13 is opened (separated from the platen roller portion 23). There is.

  The damper unit 15 is a component unit that applies tension to the continuous paper P. In the present embodiment, the damper portion 15 includes an outer damper portion (first damper portion) 15a and an inner damper portion (first damper portion) 15b, and is linked to opening and closing of the print head portion 13. It is designed to move up and down (open and close). However, when the print head unit 13 is in the closed state, the outer damper unit 15a and the inner damper unit 15b are installed in a swingable state so that tension can be applied to the continuous paper P, respectively.

  The above-described ink ribbon portion 12 is a constituent portion that supplies and winds the ink ribbon coated with the printing ink, and includes a ribbon feeding portion 12a and a ribbon winding portion 12b that is arranged in front of the ribbon feeding portion 12a. .. The ribbon supply unit 12a is a component that rotatably supports the ink ribbon wound in a roll shape. The ribbon winding unit 12b is a component that winds and collects the printed ink ribbon RB. When the ink ribbon is used, the ink ribbon drawn from the ribbon supply unit 12a is passed under the print head unit 13 and wound up by the ribbon winding unit 12b.

  In such a printer 1, the continuous paper P (Ps, Pb) fed out in a sheet form from the paper supply unit 10 is passed through the damper unit 15 to a paper passage route between the print head unit 13 and the support base 14. After being conveyed, a label or the like of the continuous paper P is printed on the way, and then discharged from the issuing port 5 to the outside of the printer 1.

  Next, the configuration of the printing unit 11 described above will be described with reference to FIGS. FIG. 4A is an enlarged perspective view of the printing unit of FIG. 3 when the print head unit is in the closed state, and FIG. 4B is a front view of the printing unit when the print head unit of FIG. 3 is in the open state. 5 is an enlarged perspective view of the printing portion of FIG. 4(a) viewed from the rear side, FIG. 6 is an enlarged side view of the printing portion of FIG. 3, and FIG. 7 is the printing head portion of FIG. It is the perspective view extracted and seen from the lower side.

  The print head unit 13 has a front portion that can swing (i.e., open and close) in a vertical direction about a rear rotation shaft S1 (see FIGS. 5 and 7) so as to be supported on one side of the print head unit 13. It is supported by a plate (first support) 17.

  A thermal head portion 18 (see FIG. 4B and FIG. 7) is installed on the lower surface of the print head portion 13 (the surface facing the paper feeding route) with its printing surface facing the paper feeding route. The thermal head unit 18 is a printing unit that prints on a label or the like of the continuous paper P by the heating resistor of the printing line 18L arranged on the printing surface. In the print line 18L, a plurality of heat generating resistors (heat generating elements) that generate heat when energized are arranged side by side in the width direction of the continuous paper P (direction orthogonal to the transport direction of the continuous paper P).

  Concave claws 19 and 19 (see FIGS. 4B and 7) are provided on the lower surface on the front side of the print head 13 so as to sandwich the thermal head 18. Further, on the lower surface of the print head portion 13, behind the concave claw portion 19, there are provided pins 20 and 20 protruding outward from both side surfaces of the print head portion 13.

  Such a print head portion 13 is biased in the opening direction by a torsion spring 21 mounted on the rotary shaft S1 (see FIGS. 5 and 7), but is not supported by the pins 20, 20 below the print head portion 13. The closed state is maintained by the lock claw portions 22, 22 of the support base 14 being hooked. When the head lock lever portion 16 is pulled rightward in FIG. 6, the lock claw portion 22 moves in the rightward direction in FIG. When the locking claw portion 22 is disengaged from the pin 20, the print head portion 13 is automatically opened by the urging force of the torsion spring 21, as shown in FIG.

  When the print head unit 13 is closed, the print surface of the thermal head unit 18 is pressed against the lower platen roller unit 23 (see FIGS. 4A and 4B) and the concave claw portion of the print head unit 13 is pressed. 19, 19 (see FIGS. 4B and 7) are fitted to both ends of the rotary shaft S2 (see FIGS. 4 and 6) of the platen roller portion 23.

  The platen roller unit 23 is a conveying unit that conveys the continuous paper P fed from the paper supply unit 10 to the issuing port 5 (see FIG. 1) along the paper passage route, and its surface is made of elastic material such as hard rubber. It is covered with material. The platen roller portion 23 is installed on the support base 14 in a state of being rotatable in the forward and reverse directions. The gear G1 is connected to one end of the platen roller portion 23 in the axial direction of the rotating shaft S2. The gear G1 is engaged with a rotating shaft of a driving body (not shown) such as a stepping motor via a timing belt (not shown) or the like. The gear G1 is connected to the gear G4 via the connecting gears G2 and G3 (see FIG. 5).

  Further, in the present embodiment, the head support plate 17 that supports the print head portion 13 is integrally formed with the restraining portion 17a (see FIGS. 5 to 7) at the end portion on the damper portion 15 side. The restraint portion 17a is formed at a position opposite to the front portion of the head support plate 17 with the rotation axis S1 as a boundary. A pin 17b (see FIG. 7) protruding from the surface of the restraint portion 17a facing the damper portion 15 on the tip side is provided. The restraint portion 17a and the pin 17b are part of a mechanism portion that opens and closes the damper portion 15 in conjunction with opening and closing of the print head portion 13. This opening/closing mechanism will be described later in detail.

  A sheet position detection sensor (not shown) is provided between the thermal head section 18 and the damper section 15 in the sheet passing route of the printing section 11. This paper position detection sensor is a sensor that detects the position of the label of the continuous paper P by detecting the position detection mark formed on the continuous paper P and the mount portion between adjacent labels, and is, for example, a light reflection type or It is composed of a light transmission type sensor.

  During the printing process, the continuous paper P is conveyed by rotating the platen roller portion 23 while sandwiching the continuous paper between the thermal head portion 18 and the platen roller portion 23. Then, the print timing is set based on the information detected by the paper position detection sensor, and the heat generating resistor of the print line 18L is selectively heated by the print signal transmitted to the thermal head unit 18. As a result, desired information such as characters, symbols, figures or bar codes is printed on the label of the continuous paper P.

  On the other hand, the outer damper portion 15a of the damper portion 15 extends obliquely downward from the front side toward the rear side when the side surface of the printing portion 11 is viewed, and the front side rotation shaft S3 (see FIGS. 4 and 6). ) As a center, the rear portion is supported by the damper support member (second support body) 25 in a state of being vertically swingable. Note that the coil spring 26 of FIG. 5 is a member that restrains the outer damper portion 15a from going too far upward (rear side) and supports the outer damper portion 15a in a swingable state, as described later. is there.

  Further, the inner damper portion 15b of the damper portion 15 extends obliquely downward from the rear side toward the front side, as opposed to the outer damper portion 15a, when the side surface of the printing portion 11 is viewed, and the rear side rotation is prevented. A front portion is supported by a rear portion of the outer damper portion 15a in a state of being vertically swingable about an axis S4 (see FIGS. 4 and 6).

  During the printing process, the paper contact portion of the inner damper portion 15b is located downstream of the paper contact portion of the outer damper portion 15a in the conveyance of the continuous paper P. That is, the paper contact portion of the inner damper portion 15b is arranged between the print head portion 13 and the paper contact portion of the outer damper portion 15a.

  Further, in the pre-sheet passing stage, the height of the paper contact portion of the inner damper portion 15b is arranged at a position lower than the height of the paper contact portion of the outer damper portion 15a. That is, the height of the paper contact portion of the inner damper portion 15b is arranged between the paper contact portion of the outer damper portion 15a and the inner bottom surface of the printer 1. The configurations of the outer damper portion 15a and the inner damper portion 15b will be described later in detail.

  Further, a width adjustment guide portion 27 is installed below the outer damper portion 15a so as to be movable along the axial direction of the rotation shafts S3, S4. The width adjustment guide unit 27 is a component unit that contacts the widthwise ends of the continuous paper P conveyed from the paper supply unit 10 and guides the conveyance of the continuous paper P. The width adjusting guide portion 27 is connected to the guide operating portion 28 on the back side of the outer damper portion 15a. The guide operating unit 28 is a knob for moving the width adjusting guide unit 27 according to the width of the continuous paper P and fixing the position of the width adjusting guide unit 27.

  Further, in the present embodiment, a recess 29 (see FIG. 6) is partially formed on the inner bottom surface of the printer 1 below the damper portion 15. The recess 29 is formed so that the lower portion of the width adjustment guide portion 27 is located below the inner bottom surface of the printer 1 when the print head portion 13 and the damper portion 15 are closed. As shown in FIG. 5 and the like, the lower end portion of the width adjustment guide portion 27 is located inside the recess portion 29, but is not in contact with the bottom surface of the recess portion 29 and is predetermined from the bottom surface of the recess portion 29. Are separated by the specified distance. The lower end of the width adjusting guide portion 27 may be formed in an arc shape, for example. The recess 29 will also be described later in detail.

  The damper support member 25 that supports the outer damper portion 15a of the damper portion 15 is in a state in which the rear portion is vertically swingable around the rotation shaft S5 (see FIGS. 5 and 6) on the front portion side. Is supported in the printer 1.

  A long groove portion (guide portion) 25 a (see FIG. 5) extending along the longitudinal direction of the damper support member 25 is formed on the upper portion of the damper support member 25. The pin 17b (see FIG. 8) of the head support plate 17 is fitted in the long groove portion 25a so as to be movable along the long groove portion 25a. As a result, the head support plate 17 that supports the print head unit 13 is engaged with the damper support member 25.

  Further, the damper support member 25 has a rear portion thereof that opens upward with the torsion spring 30 (see FIG. 5) attached to the rotation shaft S5 centering on the rotation shaft S5 (see FIGS. 5 and 6) (damper portion). 15 is urged in the direction in which the whole 15 is lifted up, but while the restraining portion 17a of the head support plate 17 is located on the outer damper portion 15a side, it is restrained by the restraining portion 17a and the closed state is maintained.

  Next, the opening/closing operation of the damper portion 15 will be described with reference to FIGS. 8 and 9. FIG. 8 is an enlarged side view of the printing unit when the print head unit is closed, and FIG. 9 is an enlarged side view of the printing unit when the print head unit is open. Note that, in FIGS. 8 and 9, the back surface of the damper support member 25 is seen through.

  In this embodiment, as shown in FIGS. 8 and 9, the damper unit 15 moves up and down (opens and closes) in conjunction with the opening and closing operation of the print head unit 13. That is, when the height of the reference position of the damper unit 15 when the print head unit 13 is in the closed state is the first height, when the print head unit 13 is opened, the height of the reference position of the damper unit 15 is linked to it. When the print head portion 13 is moved to a second height higher than the first height and the print head portion 13 is closed, the height of the reference position of the damper portion 15 returns to the first height in synchronization with the movement. ing.

  If the damper unit 15 remains fixed when the print head unit 13 is opened and the continuous paper P is passed through the paper feeding route as a preparatory step for the printing operation, the damper unit 15 is installed near the bottom surface of the housing of the printer 1. Therefore, it is necessary to pass the continuous paper P drawn from the paper supply unit 10 under the damper unit 15 in the vicinity of the bottom surface of the housing where it is difficult to work. Further, since the gap between the damper portion 15 and the bottom surface of the housing of the printer 1 is narrow, it is difficult to pass the continuous paper P. Further, since the width adjustment guide portion 27 is attached to the lower portion of the damper portion 15, the continuous paper P may be caught by the width adjustment guide portion 27 when the continuous paper P is inserted. As a result, there is a problem that it is difficult to insert the continuous paper P into the paper passage route of the printer 1. On the other hand, in the present embodiment, when the print head unit 13 is opened, the damper unit 15 is lifted in association with it, so that the frontage for inserting the continuous paper P is widened and the visibility of the lower portion of the damper unit 15 is improved. Can be improved. Therefore, the continuous paper P drawn from the paper supply unit 10 can be easily passed under the damper unit 15 without being caught by the width adjustment guide unit 27. Therefore, the operation of inserting the continuous paper P into the paper passage route of the printer 1 can be facilitated.

  In some cases, a mechanism for manually opening the damper unit 15 may be separately provided. In that case, the damper 15 is forgotten to be closed and the print head unit 13 is closed, so that sufficient tension is not applied to the continuous paper P. There may be a problem that printing is performed. On the other hand, in the present embodiment, when the print head unit 13 is closed, the damper unit 15 lowers in synchronism with it and returns to the original first height. That is, it is possible to prevent forgetting to close the damper unit 15, and thus it is possible to prevent a problem that printing is performed in a state where tension is not applied to the continuous paper P. Further, a series of insertion work of the continuous paper P can be simplified.

  Next, the interlocking mechanism of the print head unit 13 and the damper unit 15 will be described with reference to FIGS. FIG. 10 is a side view showing the head support plate and the damper support member extracted when the print head portion is opened and closed, and FIG. 11A is the head support plate and the damper support member when the print head portion of FIG. 10 is closed. 11B is a side view of the head support plate and the damper support member when the print head portion of FIG. 10 is in the open state. Note that, in FIG. 10, the two-dot chain line indicates the head support plate 17 and the damper support member 25 in the closed state. 10 and 11 show the side surface of the printing unit 11 shown in FIG.

  First, as shown by the alternate long and two short dashes line in FIG. 10 and FIG. 11A, the rear portion (left side in FIGS. 10 and 11) of the damper support member 25 is moved upward by the biasing force of the torsion spring 30 (see FIG. 10). Although biased in the opening direction (the direction away from the inner bottom surface of the printer 1), when the head support plate 17 (print head portion 13) is in the closed state, the restraining portion 17a of the head support plate 17 causes the damper support member 25 to move. Since the restraining position on the rear portion side (the side on which the outer damper portion 15a is arranged) is restrained, the opening of the damper support member 25 is restrained, and the damper portion 15 is also closed as shown in FIG.

  Here, as shown by the solid line in FIG. 10 and FIG. 11B, the front portion (right side portion in FIGS. 10 and 11) of the head support plate 17 (print head portion 13) is located above (away from the platen roller portion 23). Opening direction), the head support plate 17 rotates about the rotation axis S1. Moves in the opposite direction. That is, the pin 17b of the restraint portion 17a moves away from the restraint position on one end side of the long groove portion 25a of the damper support member 25 and automatically moves along the long trench portion 25a to the restraint release position on the other end side of the long groove portion 25a. .. As a result, the rear portion of the damper support member 25 is automatically lifted by the urging force of the torsion spring 30, so that the damper portion 15 is automatically lifted and opened as shown in FIG. 9 (from the inner bottom surface of the printer 1). Are separated). In this case, since the damper portion 15 is gradually lifted as the pin 17b of the restraint portion 17a moves from the restraint position to the restraint release position along the long groove portion 25a, it occurs when the damper portion 15 is suddenly opened. The generation of unpleasant sound can be suppressed or prevented.

  On the other hand, when the front portion of the head support plate 17 (print head portion 13) is closed downward (in the direction close to the platen roller portion 23), the restraining portion 17a of the head support plate 17 moves in the front portion of the head support plate 17. Move in the opposite direction. That is, the pin 17b of the restraint portion 17a moves away from the restraint release position on the other end side of the long groove portion 25a of the damper support member 25, and automatically returns to the restraint position on one end side of the long groove portion 25a along the long groove portion 25a. As a result, the rear portion of the damper support member 25 lowers against the urging force of the torsion spring 30, so that the damper portion 15 automatically lowers and closes as shown in FIG. 8 (on the inner bottom surface of the printer 1). Close to each other).

  The opening/closing mechanism of the damper unit 15 is not limited to the above configuration, and may be configured as follows, for example. That is, the damper supporting member 25 may be urged by a torsion spring 30 attached to the rotating shaft S5 at the rear portion thereof in a direction of closing about the rotating shaft S5 (a direction in which the entire damper portion 15 is lowered). In this case, when the print head portion 13 is opened, the rear portion of the damper support member 25 is pulled upward so that the restraint portion 17a moves from the restraint position to the restraint release position along the long groove portion 25a. As a result, the rear portion of the damper portion 15 is opened in association with the opening operation of the print head portion 13. On the other hand, when the print head portion 13 is closed, the rear portion of the damper support member 25 is lowered by the action of the torsion spring 30 as the restraint portion 17a moves from the restraint release position to the restraint position along the long groove portion 25a. There is. As a result, the rear portion of the damper portion 15 is closed in conjunction with the closing operation of the print head portion 13. In this case, the biasing force of the torsion spring 21 on the print head 13 side is set to be larger than the biasing force of the torsion spring 30 on the damper support member 25 side.

  If a mechanism for manually opening the damper unit 15 is separately provided as described above, the structure is complicated and the number of parts is increased, which increases the cost of the printer 1 and hinders downsizing of the printer 1. On the other hand, in the present embodiment, a mechanism for manually opening the damper part 15 is not separately provided, and the opening mechanism part and the closing mechanism part of the damper part 15 are also used, so that the structure is Can be simplified and the number of parts can be reduced. Therefore, the cost of the printer 1 can be reduced, and the size reduction of the printer 1 can be promoted.

  Next, the configuration of the damper support member 25 and the connection relationship between the damper portion 15 and the damper support member 25 will be described with reference to FIGS. 12 to 14. 12 is a perspective view of the damper part and the damper support member viewed from the side surface side of the printing part of FIG. 5, FIG. 13 is an exploded perspective view of the damper support member viewed from the side on which the damper part is mounted, and FIG. FIG. 14 is a perspective view showing a connecting portion between the outer damper portion and the damper supporting member of FIG. 12, and FIG. 14B is an exploded perspective view showing a connection positional relationship between the outer damper portion and the damper supporting member of FIG. 14A. It is a figure. In addition, on both side surfaces of the damper support member 25, the side surface facing the outer damper portion 15a is referred to as an inner side surface, and the back side surface thereof is referred to as an outer surface.

  A bearing hole portion 25b penetrating both side surfaces of the damper support member 25 is formed on one end side in the longitudinal direction of the damper support member 25. The rotary shaft S5 is inserted into the bearing hole portion 25b in a fixed state so as not to rotate, and is fixed by a screw 35a (see FIG. 13) so as not to come off. The torsion spring 30 is mounted with its ring fitted on the rotating shaft S5.

  Further, a hole portion 25c penetrating between both side surfaces of the damper support member 25 is formed on the other end side in the longitudinal direction of the damper support member 25. A projecting portion 36 formed on the side surface of the outer damper portion 15a projects from the hole portion 25c. The hole 25c is formed so that a margin of a predetermined dimension is formed around the protrusion 36.

  Further, the outer side surface of the damper support member 25 is formed so as to be recessed in the thickness direction. On the outer surface of the damper support member 25, a protrusion 25d is formed near the hole 25c. A coil spring 26 is installed so as to bridge between the protrusion 25d of the damper support member 25 and the protrusion 36 of the outer damper portion 15a. The coil spring 26 is urged to pull the protrusion 36 of the outer damper portion 15 a toward the protrusion 25 d of the damper support member 25. As a result, the outer damper portion 15a is firmly supported along the axial direction of the rotation shaft S3, is restrained from going too far upward, and is swingable so that tension can be applied to the continuous paper P. Supported by the state.

  Further, a bearing hole portion 25e (see FIG. 13) is formed in the upper part of the inner surface of the damper support member 25 near the center in the longitudinal direction. The rotation shaft S3 of the outer damper portion 15a is inserted into the bearing hole portion 25e in a fixed state so as not to rotate, and is fixed by a screw 35b (see FIG. 12) so as not to come off.

  Next, the configuration of the damper unit 15 will be described with reference to FIGS. 15A is a perspective view of the damper part and the damper support member seen obliquely from above, FIG. 15B is a perspective view of the damper part seen obliquely from below, and FIG. 16 is a perspective view of the damper part and damper support member from above. 17 is an exploded perspective view of the outer damper portion, and FIG. 18 is an exploded perspective view of the outer damper portion and the inner damper portion.

  A bearing hole 37 is formed on one end side (upper end side) in the longitudinal direction when the outer damper part 15a is viewed from the side. The rotary shaft S3 is inserted in the bearing hole 37. As a result, the outer damper portion 15a is rotatably supported around the rotation shaft S3. That is, the outer damper portion 15a is pivotally supported in the up-down direction so that the other longitudinal end portion (lower end portion) of the outer damper portion 15a can apply tension to the continuous paper P about the rotation axis S3. ..

  A slide hole 38 is formed on the back surface of the outer damper portion 15a along the axial direction of the rotation shaft S3. The shaft portions of the two guide operating portions 28 are inserted into the slide hole portion 38. The width adjusting guide portion 27 is connected to the shaft portion of the guide operating portion 28 by a pin 39 (see FIG. 17). Here, for example, the guide operation unit 28 on the back side is fixed. Further, the guide operating portion 28 on the front side can be moved along the slide hole portion 38, and can be fixed according to the width of the continuous paper P. The width adjusting guide portion 27 and the guide operating portion 28 will be described in detail later.

  Further, the paper contact portion with which the continuous paper P is in contact on the other end side (lower end portion side) in the longitudinal direction when the outer damper portion 15a is viewed from the side surface is formed in an arc shape when the outer damper portion 15a is viewed from the side surface side. As a result, the contact resistance between the outer damper portion 15a and the continuous paper P can be reduced, so that the flow of the continuous paper P can be smoothed.

  A bearing hole 40 is formed at the lower end of the outer damper portion 15a. The rotary shaft S4 is inserted in the bearing hole 40 in a fixed state so as not to rotate. The rotation axis S4 is arranged parallel to the rotation axis S3. An inner damper portion 15b is pivotally supported on the rotation shaft S4.

  The inner damper portion 15b has two support portions 41a, 41a and a main body portion 41b integrally formed on one end side thereof so as to bridge them. A bearing hole portion 41c is formed at one end of each of the support portions 41a, 41a. The rotary shaft S4 is inserted in the bearing hole portions 41c, 41c. As a result, the inner damper portion 15b is rotatably supported about the rotation shaft S4.

  A torsion spring 42 (see FIGS. 16 and 18) is attached to one end of the rotation shaft S4 in a state of being engaged with the inner damper portion 15b. Due to the urging force of the torsion spring 42, the inner damper portion 15b has a lower end portion (paper contact portion) that is axially rotatable about the rotating shaft S4 so that the continuous paper P can be tensioned in the vertical direction. It is supported.

  On the other hand, in the main body portion 41b of the inner damper portion 15b, the paper contact portion side in contact with the continuous paper P is formed in an arc shape when the inner damper portion 15b is viewed from the side surface. As a result, the contact resistance between the inner damper portion 15b and the continuous paper P can be reduced, so that the flow of the continuous paper P can be made smooth.

  Further, a recess 41d is formed on the surface of the main body 41b opposite to the paper contact portion. In the recess 41d, a plurality of reinforcing plates 41e are arranged at predetermined intervals along the axial direction of the rotation axis S4. This makes it possible to reduce the weight of the inner damper portion 15b while ensuring the strength of the inner damper portion 15b.

  It is also possible to provide a damper function completely separately, but in that case, the printer 1 may be upsized because the space near the damper unit 15 is limited. On the other hand, in the present embodiment, the inner damper portion 15b is pivotally supported by the outer damper portion 15a, so that sufficient tension can be applied even in the case of a backside label without causing the printer 1 to become large. It is possible to add a damper function.

  Further, in the present embodiment, the outer damper portion 15a and the inner damper portion 15b described above are made of, for example, a transparent resin. As a result, the visibility of the continuous paper P in the damper portion 15 can be improved, so that the operation of inserting the continuous paper P into the paper passage route of the printer 1 can be further facilitated. From this point of view, transparent means that the other side of the member is visible, and transparent material means not only a non-colored material but also a colored semi-transparent material or a non-colored material. It also includes transparent materials.

  A gap 43 (see FIGS. 15B and 16) is formed between the main body portion 41b of the inner damper portion 15b and the outer damper portion 15a so as not to block the movement of the width adjustment guide portion 27. There is.

  Next, the function and effect of the damper portion 15 will be described with reference to FIGS.

  FIG. 19A is an enlarged side view of the damper part when the continuous paper of the front wrapping label is inserted, and FIG. 19B is an enlarged side view of the damper part when the continuous paper of the back wrapping label is inserted.

  As shown in FIG. 19A, in the case of a front-wound label, the continuous paper Ps is fed from around the center in the height direction of the paper supply unit 10 and passed under the damper unit 15, so that the outer damper unit 15 a and The inner damper portion 15b is inserted into the paper passage route while being in contact with both of them. Therefore, sufficient tension can be applied to the continuous paper Ps, so that the continuous paper Ps can be satisfactorily conveyed and print quality can be ensured.

  On the other hand, in the case of the backside label, the continuous paper P is fed out from around the inner bottom surface of the printer 1 and passed under the damper portion 15, so that only the outer damper portion 15a is arranged (the inner damper portion 15b is In the case where the continuous paper P is not provided, the continuous paper P may be inserted into the paper feed route without being applied with sufficient tension. For this reason, the continuous paper P may not be conveyed well and the print quality may deteriorate.

  On the other hand, in the present embodiment, as shown in FIG. 19B, even in the case of the back-wrap label, the continuous paper Pb is inserted in the paper passage route while being in contact with the inner damper portion 15b. It Therefore, even in the case of a back-wrap label, the inner damper portion 15b can apply sufficient tension to the continuous paper Pb, so that the continuous paper Pb can be satisfactorily conveyed and the print quality can be secured. it can.

  Next, FIGS. 20A to 20C are side views of the damper unit at each stage. Note that FIG. 20A shows a stage before the continuous paper P is inserted into the paper passage route of the printer 1.

  FIG. 20B illustrates a case where the label is a front-wound label and the roll-shaped continuous paper Ps of the paper supply unit 10 is reduced so that the outer peripheral portion of the roll-shaped continuous paper Ps approaches the support shaft 10a. There is. In this case, since the feeding position of the continuous paper Ps is lower than that in the initial stage, the pressing force of the continuous paper Ps against the outer damper portion 15a is weakened and the height of the outer damper portion 15a does not change, but the inner damper portion 15b is lifted. Sufficient tension can be applied to the continuous paper Ps.

  FIG. 20C illustrates an example of a case where the label is a back-wound label and the roll-shaped continuous paper Pb of the paper supply unit 10 starts to decrease. In this case, since the feeding position of the continuous paper Pb is slightly higher than in the initial stage, the continuous paper Pb is in contact with the outer damper part 15a, but the pressing force is weak and the height of the outer damper part 15a does not change, but the inner damper part 15b does not change. Can be lifted and sufficient tension can be applied to the continuous paper Pb.

  FIG. 21A illustrates the case of the front-wound label and the case where the roll-shaped continuous paper Ps of the paper supply unit 10 is in the initial stage. In this case, since the feeding position of the continuous paper Ps is high, both the outer damper portion 15a and the inner damper portion 15b are lifted up, and sufficient tension can be applied to the continuous paper Ps.

  FIG. 21B illustrates a case of a backside label in which the roll-shaped continuous paper Pb of the paper supply unit 10 is reduced and the outer peripheral portion of the roll-shaped continuous paper Pb approaches the support shaft 10a. There is. In this case, since the feeding position of the continuous paper Pb is higher than that in the initial stage, both the outer damper portion 15a and the inner damper portion 15b are lifted, and sufficient tension can be applied to the continuous paper Pb.

  Next, the width adjustment guide portion 27 and the guide operation portion 28 will be described with reference to FIGS. 22 to 26. 22 is a perspective view of the outer damper portion as seen from the front side of the printer, FIG. 23 is a perspective view showing the outer damper portion extracted from FIG. 22, and FIG. 24 is a width adjusting guide portion and a guide operating portion 28 from FIG. FIG. 25 is a perspective view extracted and shown, FIG. 25 is a perspective view showing a connecting portion between the width adjusting guide portion and the guide operating portion, and FIG. 26 is a perspective view of an engaging portion between the shaft portion of the guide operating portion and the width adjusting guide portion. Is. In FIG. 26, the pin 39 is omitted in order to make the shaft portion 28a of the guide operating portion 28 easy to see.

  As shown in FIGS. 22 and 23, two guide rail portions 45 are formed inside the outer damper portion 15a in a state of extending along the slide hole portion 38 so as to sandwich the slide hole portion 38 above and below. ing. The guide rail portion 45 is formed integrally with the outer damper portion 15a and is made of, for example, a transparent resin.

  As shown in FIG. 22, the pin 39 that connects the width adjusting guide portion 27 and the guide operating portion 28 is arranged at a position sandwiched by the two guide rail portions 45 of the outer damper portion 15a. On the outer periphery of the pin 39, as shown in FIGS. 22, 24 and 25, two convex portions 39a, 39a are formed so as to project in the radial direction. The convex portions 39a, 39a are formed at positions separated from each other by 180 degrees.

  When the guide operating portion 28 is pinched and rotated about the shaft portion 28a, the pin 39 is also rotated. Then, the two convex portions 39a, 39a of the pin 39 are pressed against the two guide rail portions 45 by the rotating position of the pin 39, whereby the guide rail portion 45 is bent and the pin 39 is fixed. .. As a result, the guide operating unit 28 is locked. On the other hand, when the guide operating portion 28 is further rotated 90 degrees from the locked state, the two convex portions 39a, 39a of the pin 39 separate from the two guide rail portions 45, so that the locked state of the guide operating portion 28 is released. .. Therefore, in the present embodiment, the position of the width adjustment guide portion 27 can be set with a simple structure and a simple operation.

  Further, as shown in FIG. 26, a convex portion 28b is formed on the outer periphery of the shaft portion 28a of the guide operating portion 28. A range setting hole 27b is formed on the outer periphery of the hole 27a into which the shaft portion 28a of the guide operating portion 28 is inserted in the width adjusting guide portion 27 so as to communicate with the hole 27a. The convex portion 28b is arranged in the range setting hole 27b, and the guide operating portion 28 can be rotated within the range θ in the circumferential direction of the range setting hole 27b.

  Next, the function and effect of providing the recessed portion 29 below the damper portion 15 will be described with reference to FIG. 19 and the like.

  When the continuous paper P is returned from the printing unit 11 to the paper supply unit 10 side when there is no dent 29 below the damper unit 15 and is flat, so-called back feeding is performed, the continuous paper P is loosened and the inner bottom surface of the printer 1 is removed. I will end up. In this case, since the lower part of the width adjustment guide part 27 of the damper part 15 is located above the inner bottom surface of the printer 1, the continuous paper is located below the lower end of the width adjustment guide part. Therefore, the continuous paper may fall outside the range determined by the width adjustment guide section. However, if the printing operation returns in that state, the continuous paper will ride on the width adjustment guide section and be conveyed in a state where the damper section is not functioning.As a result, the printing position will deviate from the planned position or the printing density will become light. Therefore, there is a problem that the print quality is deteriorated. In particular, in the case of a continuous paper having a short width, it often comes off from the width adjusting guide portion. Further, the roll-shaped continuous paper loaded in the paper supply unit may be loosened due to inertia caused by rotation.

  On the other hand, in the present embodiment, the recessed portion 29 is provided on the inner bottom surface of the printer 1 so that the lower portion of the width adjustment guide portion 27 of the damper portion 15 is located below the inner bottom surface of the printer 1. .. As a result, the lower portion of the width adjustment guide portion 27 of the damper portion 15 is located below the line on the inner bottom surface of the printer 1, so that the continuous paper P does not fall out of the range determined by the width adjustment guide portion 27. .. Therefore, when the printing operation is returned to, the continuous paper P does not ride on the width adjustment guide portion 27, so that the function of the damper portion 15 is not impaired. Therefore, it is possible to avoid the problem that the print position deviates from the planned position or the print density becomes low, and thus the print quality of the printer 1 can be ensured.

  The cross-sectional shape of the recessed portion 29 is formed such that the inclination of the rear side (upstream of the conveyance in the printing step) is gentler than the inclination of the front side (downstream of the conveyance in the printing step). However, the inner wall surface of the recess 29 may be substantially perpendicular to the inner bottom surface of the printer 1.

  Further, a plurality of protrusions (not shown) extending along the conveyance direction of the continuous paper P are arranged on the inner bottom surface of the printer 1 including the recessed portion 29 at predetermined intervals along the width direction of the continuous paper P. You may. As a result, the flow of the continuous paper P can be made smooth during the back feed, so that it is possible to reduce or prevent the trouble that the continuous paper P is jammed below the damper portion 15.

  Next, the operation of inserting the continuous paper P into the paper passage route of the printer 1 will be described with reference to FIGS. 8 and 9.

  First, when the head lock lever portion 16 of the printing unit 11 shown in FIG. 8 is pulled to the right in FIG. Then, as shown in FIG. 9, the front portion of the print head portion 13 is automatically opened upward by the urging force of the torsion spring 21 (see FIG. 10, etc.), and the rear portion of the damper support member 25 is interlocked with the operation. The portion is lifted by the biasing force of the torsion spring 30 (see FIG. 10 etc.) and the damper portion 15 is also automatically lifted. As a result, the frontage below the damper portion 15 can be widened.

  Subsequently, the continuous paper P fed from the paper supply unit 10 is passed under the damper unit 15 and passed between the print head unit 13 and the support base 14. At this time, since the damper unit 15 is lifted and opened, the work of inserting the continuous paper P can be facilitated.

  Thereafter, as shown in FIG. 8, when the front portion of the print head portion 13 is pushed down and the print head portion 13 is closed, the rear portion of the damper supporting member 25 resists the biasing force of the torsion spring 30 in conjunction with the operation. The descending damper part 15 also automatically descends. As a result, it is possible to prevent forgetting to close the damper unit 15, so that the tension of the damper unit 15 can be applied to the continuous paper P during the printing process. Therefore, the continuous paper P can be satisfactorily conveyed, and the print quality can be ensured.

  Although the invention made by the inventor has been specifically described based on the embodiments, the embodiments disclosed in the present specification are exemplifications in all respects and are limited to the disclosed technology. It should be considered not a thing. That is, the technical scope of the present invention should not be interpreted restrictively based on the description in the above-mentioned embodiment, but should be interpreted according to the description of the claims to the last. All the modifications are included without departing from the scope of the claims and the technology equivalent to the described technology.

  For example, in the above-described embodiment, the case where a continuous paper in which a plurality of labels are temporarily adhered to a mount is used as the print medium has been described, but the present invention is not limited to this, and for example, one surface has an adhesive surface. A continuous label (a label without a backing sheet), a continuous sheet having no adhesive surface (a continuous sheet), a paper or the like which can be printed by a thermal head, or the like can be used as a print medium. The uncoated label, continuous sheet or film can have position detection marks. Further, in the case of transporting a label without a backing sheet where the adhesive is exposed, the transport path can be non-adhesive coated and a roller containing silicone can be provided.

  In the above description, the case where the present invention is applied to a stand-alone printer in which an input operation to the printer is performed without using a personal computer has been described. However, the present invention is not limited to this, and for example, to the printer. It may also be applied to an online printer in which input operation is performed via a personal computer.

  The printer according to the present embodiment includes a medium supply unit that supplies a print medium, a conveying unit that conveys the print medium supplied from the medium supply unit along a medium conveyance path, and a printer that can be opened and closed on the medium conveyance path. A print head portion provided in a state, a print means provided on the print head portion, for printing on the print medium conveyed along the medium conveying path, and the medium supplying section and the medium in the medium conveying path. It is arranged between the print head portion and is provided in a swingable state so as to apply tension to the print medium, and is provided so as to open upward in conjunction with the opening operation of the print head portion. And a damper section that is provided.

  According to this, since the damper section is opened in association with the opening operation of the print head section, the work of inserting the print medium into the medium transport path of the printer can be facilitated.

  Further, in the present embodiment, the damper portion is provided so as to be closed downward in conjunction with the closing operation of the print head portion.

  According to this, since the damper unit is closed in association with the closing operation of the print head unit, it is possible to prevent forgetting to close the damper unit after inserting the print medium into the medium transport path of the printer.

  Further, in the present embodiment, a first support body that supports the print head portion in an openable and closable state, a second support body that supports the damper portion in an openable and closable state, and the second support body. And a spring for urging the first support member in the opening direction, and restraining the opening operation of the second support member against the urging force of the spring when the print head unit is in the closed state. And a guide that is provided on the second support and guides the restraint portion to the restraint release position when the print head portion is opened and guides the restraint portion to the restraint position when the print head portion is closed. And a section.

  According to this, with a simple structure, it is possible to facilitate the work of inserting the print medium into the medium transport path of the printer.

  Further, in the present embodiment, the damper section is made of a transparent material.

  According to this, since the visibility of the print medium in the damper portion can be improved, the work of inserting the print medium into the medium transport path of the printer can be further facilitated.

  Further, in the present embodiment, a guide piece that contacts at least one side edge of the print medium and guides the conveyance of the print medium, and a guide piece that is connected to the guide piece and that rotates the lock and unlock of the guide piece. And an operating section that is operated by the.

  According to this, the position of the guide piece can be set with a simple structure and a simple operation.

1 Printer 10 Paper Supply Section 10a Support Shaft 10b Roll Guide Section 11 Printing Section 12 Ink Ribbon Section 13 Print Head Section 14 Support Stand 15 Damper Section 15a Outer Damper Section 15b Inner Damper Section 16 Head Lock Lever Section 17 Head Support Plate 17a Restraining Section 17b Pin 18 Thermal head 18L Print line 19 Recessed claw 20 Pin 21 Torsion spring 22 Lock claw 23 Platen roller 25 Damper support member 25a Long groove 25b Bearing hole 25c Hole 25d Projection 25e Bearing hole 26 Coil spring 27 Width adjustment guide portion 28 Guide operation portion 29 Recess portion 30 Torsion spring 35a, 35b Screw 36 Projection portion 37 Bearing hole portion 38 Slide hole portion 39 Pin 40 Bearing hole portion 41a Support portion 41b Main body portion 41c Bearing hole portion 41d Recess portion 41e Reinforcement Plate 42 Torsion Spring 43 Gap P, Ps, Pb Continuous Paper RB Ink Ribbon S1 to S5 Rotation Axis G1 Gear

Claims (6)

Transporting means for transporting the print medium,
A print head unit that has a printing unit that prints on the print medium, and that the printing unit can be opened and closed so as to be spaced apart and close to the transport unit;
A paper contact portion that is openably and closably provided on the upstream side in the conveying direction of the printing means,
A first support body provided with the print head section and swingably supported;
A second support body provided with the paper contact portion and swingably supported;
Have
When the first support body is swung so that the print head unit is closed, the second support body is pressed by the first support body and swings, whereby the paper contact portion is moved. and closing operation,
An ink ribbon portion for supplying and winding the ink ribbon is provided above the print head portion.
Printer. The printer according to claim 1, wherein
The ink ribbon unit has a ribbon supply unit that supplies the ink ribbon, and a ribbon winding unit that winds the ink ribbon,
The ribbon winding section is located right above the print head section in the vertical direction,
Printer. The printer according to claim 1 or 2 , wherein
Below the paper contact portion, a facing surface facing the paper contact portion is provided,
A medium transport path for the print medium is formed between the paper contact portion and the facing surface.
Printer. The printer according to claim 3 , wherein
When the paper contact portion is opened, the paper contact portion is separated from the facing surface,
When the paper contact portion closes, the paper contact portion approaches the facing surface,
Printer. The printer according to claim 4 , wherein
The paper contact portion is closest to the facing surface when the print head portion is in a closed state,
Printer. The printer according to any one of claims 1 to 5 , wherein:
A spring for urging the second support member in the opening direction,
A restraint portion provided on the first support member to restrain the opening operation of the second support member against the biasing force of the spring when the print head unit is in the closed state;
Has,
Printer.

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