JP4633140B2 - Printer - Google Patents

Description

  The present invention relates to a printer that performs printing using a thermal head, and transfers the ink from the ink ribbon to the printing medium by stacking and transporting the ink ribbon and the printing medium between the platen roller and the thermal head. The present invention relates to a printer that performs printing.

  Between the platen roller and the thermal head, the medium to be printed such as the continuous label body or the continuous tag body and the ink ribbon stretched over the ribbon take-up shaft and the ribbon supply shaft are stacked and transported. In a printer that prints predetermined print information on a print medium, a print unit including a thermal head, a ribbon take-up shaft, and a ribbon supply shaft is disposed between the main body and the upper cover portion, and the upper cover portion and the print unit are arranged. It is known that the medium to be printed and the ink ribbon can be exchanged by supporting them rotatably by a support shaft 17 and opening the upper lid part and the printing unit (for example, see Patent Document 1).

  In general, in this type of printer, when replacing the ink ribbon, that is, when a new ink ribbon is bridged between the ribbon take-up shaft and the ribbon supply shaft via the thermal head, the working space is set up and down. The print unit is configured to be supported in a secured state, and after replacing the ink ribbon, a force in the closing direction is applied to the print unit or the upper lid so that the print unit can be easily moved to the print position. It can be set.

  However, in the prior art, if a force in the closing direction is applied to the printing unit when the ink ribbon is replaced, the printing unit is unexpectedly closed or the printing unit and the upper cover are interlocked. However, there is a possibility that the upper lid portion may be closed, and the replacement work of the ink ribbon is hindered.

JP 2005-81729 A

  The present invention has been made in view of such a problem, and an object of the present invention is to close the printing unit and the upper cover even if a closing force is applied to the printing unit when the ink ribbon is replaced. Therefore, the present invention provides a printer in which the operation of replacing the ink ribbon is not hindered.

In order to solve the above problems, the present invention has the following configuration.
The gist of the invention described in claim 1 is that printing is performed by sandwiching and transporting a medium to be printed and an ink ribbon spanned between a ribbon take-up shaft and a ribbon supply shaft between a platen roller and a thermal head. And a printing unit including the thermal head, the ribbon take-up shaft, and the ribbon supply shaft is disposed between the main body and an upper lid portion that covers an upper portion of the main body, and the upper lid portion and the printing unit. Is supported by a support shaft so as to be rotatable, and the upper lid part and the printing unit are opened to replace the print medium and the ink ribbon. An upper lid support means for releasing the support of the upper lid portion by applying a force in a closing direction to the upper lid portion, and supporting the upper lid portion by the upper lid portion supporting means. In the state where the printing unit is supported, the printing unit support means for supporting the printing unit in a state where the working space is secured vertically, and in the state where the printing unit is supported by the printing unit support means, Even if a force in the closing direction is applied to the printing unit, the upper lid support means supports the upper lid part, and the release prevention means prevents the printing unit support means from releasing the printing unit support. It exists in the printer characterized by doing.
The gist of the invention described in claim 2 is that the function of the release prevention means is released by opening the print unit toward the upper lid portion from the state where the print unit is supported by the print unit support means. The printer according to claim 1, wherein:
The gist of the invention according to claim 3 is that the upper lid support means has one end fixed to the upper lid, the open end is inserted through an opening formed in the main body, and from the open end side. A first piece having elasticity, in which an upper lid stopper for supporting the upper lid portion is formed by contacting the edge of the opening by a slit formed with the same width toward the one end side, and a second piece A state where the print unit is supported by the print unit support means which is provided in the print unit and is movably inserted into the slit. The printer according to claim 1 or 2, wherein the protrusion means is a protrusion means that inhibits elasticity of the first piece.

  The printer according to the present invention supports the upper lid portion at a predetermined position, and also applies an upper lid portion to the upper lid portion by applying a force in the closing direction to the upper lid portion, and the upper lid portion supporting means. In a state where the upper lid portion is supported by the means, the printing unit support means for supporting the printing unit in a state where the work space is secured vertically, and in the state where the printing unit is supported by the printing unit support means, the upper lid portion and Even if a force in the closing direction is applied to the printing unit, the printing unit is provided with the upper lid support by the upper lid support means and the release blocking means for preventing the printing unit support from being released by the printing unit support means. When the ink ribbon is replaced by supporting the printing unit in a state where the working space is secured above and below by the supporting means, the release preventing means Therefore, the upper lid support means prevents the upper lid part from being supported and the print unit support means from releasing the support of the print unit. Therefore, when the ink ribbon is replaced, a force in the closing direction acts on the print unit. On the other hand, it is possible to prevent the printing unit and the upper lid from being closed, and there is an effect that the replacement operation of the ink ribbon is not hindered.

  Furthermore, the printer of the present invention is configured such that the function of the release preventing means is released by opening the print unit toward the upper lid portion from the state where the print unit is supported by the print unit support means. Therefore, after replacing the ink ribbon, the function of the release prevention means can be canceled and the upper lid can be closed by a simple operation of opening the printing unit toward the upper lid. By opening the unit toward the upper lid portion, the print surface of the thermal head can be seen, so that it is possible to prompt the user to check whether or not the ink ribbon is normally stretched.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a schematic side view showing a configuration of an embodiment of a printer according to the present invention, FIG. 2 is an external perspective view showing a closed state of the embodiment of the printer according to the present invention, and FIG. FIG. 4 is an external perspective view showing the open state of the embodiment of the printer according to the present invention, FIG. 4 is a schematic perspective view showing the configuration of the guide plate and the arm portion shown in FIG. 3, and FIG. 6 is an explanatory view for explaining the operation of the guide plate shown in FIG. 6, FIG. 6 is a schematic side view showing the configuration of the printing unit in the closed state shown in FIG. 2, and FIG. It is a schematic side view which shows the structure of a printing unit.

  Referring to FIG. 1, the printer 10 of the present embodiment has a platen roller 11 as a printing unit and a surface (hereinafter referred to as a printing surface) on which a plurality of heating elements are formed in the width direction. A platen roller 11 and a thermal head 12 having a thermal head 12 disposed so as to oppose each other, and a printing medium 1 such as a label continuous body in which a plurality of labels are temporarily attached to a belt-like mount and an ink ribbon 2 are overlapped. It is configured such that printing is performed by transferring ink from the ink ribbon 2 to the print medium 1 by being nipped and conveyed between the head 12 and the heat generating body of the thermal head 12 selectively generating heat.

  The medium 1 to be printed is rolled (rolled) around a cylindrical body such as a paper tube, that is, roll paper 3 is rotatably supported (accommodated) by the supply unit 13. It is supplied between the head 12. The ink ribbon 2 is stretched between a ribbon take-up shaft 14 and a ribbon supply shaft 15 that are rotationally driven in conjunction with the platen roller 11, and is wound around the ribbon supply shaft 15 in a roll shape. The supported ink ribbon 2 is supplied together with the printing medium 1 between the platen roller 11 and the thermal head 12, and the transferred ink ribbon 2 is taken up by the ribbon take-up shaft 14.

  Further, the printer 10 includes a platen roller 11 and a supply unit 13, a main body 20 whose upper part is released, an upper lid part 30 covering the upper part of the main body 20, a thermal head 12, a ribbon take-up shaft 14, and a ribbon supply shaft 15. And a printing unit 40 disposed between the main body 20 and the upper lid portion 30, and the upper lid portion 30 and the printing unit 40 are provided with a discharge port 16 through which printed medium to be printed is discharged. It is configured to open from the near side, and is rotatably supported by a support shaft 17 provided on the back side of the main body 20.

  FIG. 2 shows the printer 10 in a closed state in which the upper lid portion 30 is closed. In the closed state, the printing unit 40 is positioned between the main body 20 and the upper lid portion 30, and as shown in FIG. The thermal head 12 provided in the printing unit 40 is pressed against the platen roller 11 provided in the main body to be positioned. Note that the printing unit 40 is configured to be detachable from the upper lid portion 30, and in the closed state illustrated in FIG. 2, the printing unit 40 is in a fitted state fitted to the upper lid portion 30.

  FIG. 3 shows the printer 10 in an opened state in which the upper lid 30 is opened. The upper lid 30 is guided by a guide plate 31 having a function of supporting the upper lid 30 in the opened state shown in FIG. It is configured to be opened and closed. Referring to FIG. 4A, the guide plate 31 is an arc-shaped member centered on the support shaft 17, and one end portion is fixed to the upper lid portion 30 and the release end side is formed on the main body 20. A flange 32 that restricts the angle at which the upper lid 30 opens is formed by contacting the back surface of the edge of the opening 21 at the distal end on the open end side.

  Further, the guide plate 31 is divided into a first piece 31a and a second piece 31b by a slit 33 formed with the same width from the release end side toward one end side fixed to the upper lid portion 30. The first piece 31a can be bent with elasticity toward the inner side, that is, in the direction of the second piece 31b facing each other across the slit 33, and the first piece An upper lid stopper 34 protrudes from the outer side of 31a, that is, the surface opposite to the surface facing the second piece 31b across the slit 33. When the upper lid 30 is opened at a predetermined angle or more, the upper lid stopper 34 is pulled out from the opening 21 and elastically contacts the surface side of the edge of the opening 21 so that the upper lid 30 can be supported in the open state shown in FIG.

  On the other hand, referring to FIG. 3, in the printing unit 40, the ribbon take-up shaft 14 and the ribbon supply shaft 15 are rotatably spanned on the release end side of the arm portion 41 whose one end is supported by the support shaft 17. A right ribbon frame 42 and a left ribbon frame 43 are provided, and can be independently rotated with respect to the upper lid portion 30. The upper lid portion 30 is provided with a contact member (not shown) that keeps the print unit 40 in a fitted state by contacting the print unit 40 with elasticity, and from the closed state shown in FIG. When opening the upper lid 30, the printing unit 40 is also rotated together with the upper lid 30 in the fitted state.

  Referring to FIG. 4B, the arm portion 41 is formed with a notch 41 a that is locked to the arm stopper 35 formed on the first piece 31 a of the guide plate 31. A protrusion 41b is provided to be movably inserted into the formed slit 33, and the printing unit 40 rotated together with the upper lid 30 in the fitted state is pulled out from the upper lid 30 and the printing unit 40 is removed. When moved in the closing direction, the notch 41a formed in the arm portion 41 is locked to the arm stopper 35 formed in the first piece 31a of the guide plate 31, and the print unit 40 is shown in FIG. It can be supported by being pulled out from the upper lid 30 and being independent, that is, in a state where a work space is secured vertically.

  In addition, the protruding portion 41b moves to one end side fixed to the upper lid portion 30 of the guide plate 31 as shown in FIG. 5A when the printing unit 40 is fitted to the upper lid portion 30. When the printing unit 40 is pulled out from the upper lid 30 and is independent as shown in FIG. 3, the printing unit 40 is configured to move to the release end side of the guide plate 31 as shown in FIG. .

  As shown in FIG. 5A, the first piece 31 a in the guide plate 31 is in a state in which the protrusion 41 b inserted into the slit 33 moves to one end fixed to the upper lid portion 30 of the guide plate 31. By closing the upper lid 30, the upper lid stopper 34 is pushed by the edge of the opening 21 and the first piece 31 a is bent inward, and the upper lid stopper 34 and the edge of the opening 21 are Is released so that the closed state shown in FIG. 2 can be shifted.

  On the other hand, as shown in FIG. 5B, the first piece 31 a and the second piece in the guide plate 31 are in a state where the protrusion 41 b inserted into the slit 33 moves to the release end side of the guide plate 31. Since the elasticity of the first piece 31a is hindered by the protrusion 41b located between the upper cover portion 31b and the upper cover portion 30, the first piece 31a does not bend inward even if the upper cover portion 30 is closed. The contact with the edge of the opening 21 is not released, and the closed state shown in FIG. 2 cannot be shifted.

  Further, the printing unit 40 includes a head pressure adjusting means including an adjustment shaft 44 that extends in a direction perpendicular to the right ribbon frame 42 and the left ribbon frame 43, and an eccentric member 45 that is attached to the adjustment shaft 44. ing. In the right ribbon frame 42, through holes for operating the ribbon take-up shaft 14, the ribbon supply shaft 15 and the adjustment shaft 44 are formed at locations corresponding to the ribbon take-up shaft 14, the ribbon supply shaft 15 and the adjustment shaft 44, respectively. Has been. In the left ribbon frame 43, a transmission gear (not shown) that is engaged with the transmission gear 22 that is rotationally driven together with the platen roller 11 in the closed state shown in FIG. 2, and a rotational drive from the transmitted gear to the ribbon take-up shaft 14. A driving force transmission mechanism (not shown) such as a gear or a belt for transmitting force is provided.

  Referring to FIG. 6, the head housing 60 is assembled below the ribbon take-up shaft 14 and the ribbon supply shaft 15, and is supplied from the ribbon supply shaft 15 between the platen roller 11 and the thermal head 12. 2 has a lower surface that functions as a guide surface for guiding the two. Further, the head housing 60 has the thermal head 12 with respect to the print surface with respect to a rotation shaft (not shown) provided on the upstream side in the transport direction of the print medium 1 with respect to the thermal head 12 (the heating element formed). The thermal head 12 is fixed to the head housing 60 so as to be movable in a substantially vertical direction, and the head housing 60 is disposed on the opposite side of the printing surface of the thermal head 12 to the printing unit. A pressing member 61 that comes into contact with a head pressure adjusting means, which will be described later, is supported so as to be movable in a direction perpendicular to the print surface when assembled to 40, and between the thermal head 12 and the pressing member 61. A spring 62 is interposed. Thereby, the thermal head 12 fixed to the head housing 60 is pressed against the platen roller 11 by the urging force of the spring 62.

  Head pressure adjusting means including an adjusting shaft 44 and an eccentric member 45 is provided above the assembled head housing 60, that is, on the pressing member 61 side. The adjusting member 44 is rotated to rotate the eccentric member 45. By contacting the pressing member 61, the position of the pressing member 61 in the head housing 60 can be controlled to adjust the force with which the thermal head 12 is pressed against the platen roller 11, that is, the head pressure. ing.

  The printing unit 40 is provided with a ribbon cover 50 that covers the lower side of the ribbon supply shaft 15. The ribbon cover 50 is disposed on the back side of the ribbon supply shaft 15, that is, on the arm portion 41 side, and the right ribbon. A pivot shaft 51 perpendicular to the frame 42 and the left ribbon frame 43 is rotatably supported.

  When the ribbon cover 50 is in a closed state in which the upper lid portion 30 is closed, that is, in a fitted state in which the printing unit 40 is fitted in the upper lid portion 30, referring to FIG. 6, the rotation shaft 51 of the ribbon cover 50 is sandwiched. When the abutting portion 36 provided on the upper lid portion 30 abuts on the abutted end 53, the ribbon cover 50 is closed, and the gap between the lower surface of the head housing 60 and the upper surface of the ribbon cover 50 is reduced. A guide plate that serves as an insertion path 52 for the ink ribbon 2 supplied from the ribbon supply shaft 15 to the thermal head 12, and the lower surface of the ribbon cover 50 guides the printing medium 1 supplied from the supply unit 13 to the thermal head 12 from above. Is configured to function as

  As shown in FIG. 3, the ribbon cover 50 is in the open state in which the upper lid portion 30 and the printing unit 40 are independently rotated, and the contact portion 36 provided on the contacted end 53 and the upper lid portion 30. 7 and the abutment between the ribbon cover 50 and the main body 20 are released, so that the ribbon cover 50 is rotated in the direction away from the lower surface of the head housing 60 by its own weight, as shown in FIG. As shown, the insertion passage 52 is greatly expanded.

Next, the mounting operation of the ink ribbon 2 to the printing unit 40 in the present embodiment will be described in detail with reference to FIGS.
FIG. 8 is an explanatory view for explaining the operation of attaching the ink ribbon to the printing unit in the embodiment of the printer according to the present invention. FIG. 9 is a plan view of the printing unit shown in FIG. FIG.

  When the roll paper 3 or the ink ribbon 2 is replaced, first, when the upper lid 30 is opened from the closed state shown in FIG. 2 until it is supported by the upper lid stopper 34, the printing unit 40 also rotates together with the upper lid 30 in the fitted state. Therefore, the upper part of the supply unit 13 is released, and the replacement work of the roll paper 3 can be performed.

  Next, the notch 41 a formed in the arm portion 41 is formed in the first piece 31 a of the guide plate 31 by pulling out the printing unit 40 from the upper lid portion 30 and moving the printing unit 40 in the closing direction. The print unit 40 is pulled out from the upper lid 30 and supported in an independent state as shown in FIG. As a result, the upper and lower portions of the printing unit 40 are released, and a space in which the ink ribbon 2 can be exchanged is secured (hereinafter, the printing unit 40 is pulled out from the opened upper lid portion 30 and the arm portion). The state where 41 is supported by the arm stopper 35 is referred to as a ribbon replacement state).

  In the ribbon replacement state, the ribbon cover 50 is rotated in a direction away from the lower surface of the head housing 60, and the insertion path 52, that is, the gap between the lower surface of the head housing 60 and the upper surface of the ribbon cover 50 is at least the supply spool shaft 4 and The supply spool shaft 4 from which the unused ink ribbon 2 has been drawn is removed from the supply spool shaft mounting portion 15a, as shown by the arrow in FIG. The take-up spool shaft 5 around which the transferred ink ribbon 2 is taken up is removed from the take-up spool shaft mounting portion 14a through the insertion passage 52 that is greatly expanded through the supply spool shaft 4.

  As shown in FIG. 8A, the ink ribbon 2 winds the supply spool shaft 4 formed of a cylindrical body such as a paper tube around which the unused ink ribbon 2 is wound, and the ink ribbon 2 after transfer. It is provided over a take-up spool shaft 5 made of a cylindrical body such as a paper tube. Referring to FIG. 9A, the ribbon take-up shaft 14 has a take-up spool shaft mounting portion 14 a that holds the take-up spool shaft 5 in the axial direction, and the ribbon supply shaft 15 has the supply spool shaft 4 as a shaft. A supply spool shaft mounting portion 15a sandwiched from the direction is provided, and as shown in FIG. 9B, the take-up spool shaft 5 is mounted on the take-up spool shaft mounting portion 14a as a ribbon take-up shaft 14. In addition, the supply spool shaft 4 is configured to be mounted as the ribbon supply shaft 15 on the supply spool shaft mounting portion 15a.

  Next, a new ink ribbon 2 around which the supply spool shaft 4 is wound is prepared, and as shown by an arrow in FIG. 8A, the take-up spool shaft 5 is passed through the insertion passage 52 which is greatly expanded. As shown by the arrow in FIG. 8 (b), the supply spool is connected to the take-up spool shaft mounting portion 14a using the take-up spool shaft 5 as the ribbon take-up shaft 14 so that the ink ribbon 2 passes through the print surface of the thermal head 12. The shaft 4 is mounted on the supply spool shaft mounting portion 15a as the ribbon supply shaft 15 and the ribbon take-up shaft 14 and the ribbon supply shaft 15 are rotated, so that the slack of the ink ribbon 2 is eliminated.

  In the ribbon replacement state, it is assumed that a force in the direction of closing the printing unit 40 is applied when the ink ribbon 2 is removed or attached, but in this embodiment, the force in the direction of closing the printing unit 40 is applied. Even if it acts, the printing unit 40 and the upper lid 30 are configured not to be closed. That is, in the ribbon replacement state, since the protrusion 41b inserted into the slit 33 of the guide plate 31 has moved to the release end side of the guide plate 31, the first piece 31a and the second piece 31b of the guide plate 31 The elasticity of the first piece 31a is hindered by the protrusion 41b located between the upper and lower lid stoppers 34 and 34, even if an attempt is made to close the upper lid 30 because the first piece 31a is not bent inward. 21 is not released, and the upper lid 30 cannot be shifted to the closed state shown in FIG. 2 and the arm stopper 35 of the first piece 31a in the guide plate 31 The printing unit 40 on which the portion 41 is supported cannot be shifted to the closed state shown in FIG.

  In addition, when any trouble such as wrinkles or a change in print color occurs in the ink ribbon 2 in use, the unused ink ribbon 2 has been transferred to the take-up spool shaft 5. An exchange operation may be performed in a state where the ink ribbons 2 are wound. In this case, the supply spool shaft 4 around which the unused ink ribbon 2 is wound or the transferred ink ribbon 2 is moved. It is necessary to pass the winding spool shaft 5 that is wound through the insertion passage 52 that is greatly expanded. Therefore, in the ribbon replacement state, the insertion spool 52, that is, the gap between the lower surface of the head housing 60 and the upper surface of the ribbon cover 50, the winding of the supply spool shaft 4 and the winding spool shaft 5 in a state where at least half of the ink ribbon 2 is used. It is more preferable that the supply spool shaft 4 and the take-up spool shaft 5 in a state where the ink ribbon 2 is half used can be passed through the insertion passage 52 by setting the diameter to be wider than the diameter.

  Next, after the printing unit 40 is fitted into the upper lid portion 30 and the state of the ink ribbon 2 that is laid across the printing surface of the thermal head 12 is confirmed, the printing unit 40 is fitted in the upper lid. The part 30 is closed as shown in FIG. In the fitted state in which the printing unit 40 is fitted to the upper lid portion 30, as shown in FIG. 6, the contact end 53 provided on the upper lid portion 30 with the rotating shaft 51 of the ribbon cover 50 sandwiched therebetween. When the contact portion 36 abuts, the ribbon cover 50 is closed, and the protrusion 41b inserted into the slit 33 moves to one end side fixed to the upper lid portion 30 of the guide plate 31. Therefore, the elasticity of the first piece 31a in the guide plate 31 is ensured, that is, the upper lid stopper 34 can be pushed by the edge of the opening 21 and the first piece 31a can be bent inward, and the upper lid 30 can be By closing, the contact between the upper lid stopper 34 and the edge of the opening 21 is released, and the closed state shown in FIG. 2 can be shifted.

  As described above, according to the present embodiment, the upper lid 30 is supported at a predetermined position, and the upper lid 30 is supported by applying a force in the closing direction to the upper lid 30. The upper lid stopper 34 (guide plate 31) to be released and the arm stopper 35 (guide plate) that supports the printing unit 40 in a state where the upper lid 30 is supported by the upper lid stopper 34 and the working space is secured vertically. 31) and in a state where the printing unit 40 is supported by the arm stopper 35, even if a force in the closing direction is applied to the upper lid 30 and the printing unit 40, the upper lid 30 is supported by the upper lid stopper 34. By providing a projection 41b that prevents the arm stopper 35 from releasing the support of the printing unit 40, the arm stopper 35 is provided. Therefore, when the ink ribbon 2 is exchanged while supporting the printing unit 40 in a state where the working space is secured vertically, the protrusion 41b supports the upper lid 30 by the upper lid stopper 34 and the arm stopper 35. Since the release of the support of the printing unit 40 is prevented, the printing unit 40 and the upper lid part 30 are closed unintentionally even if a closing force is applied to the printing unit 40 when the ink ribbon 2 is replaced. As a result, the replacement work of the ink ribbon 2 is not hindered.

  Furthermore, according to the present embodiment, the projection unit 40 is a protrusion that is a release prevention unit by opening the printing unit 40 toward the upper lid 30 from the state in which the printing unit 40 is supported by the arm stopper 35 (guide plate 31). Since the function of the part 41b is released, the function of the protrusion 41b, which is a release prevention means, can be achieved by a simple operation of opening the printing unit 40 toward the upper lid part 30 after the ink ribbon 2 is replaced. And the upper lid 30 can be moved to a state where the upper lid 30 can be closed, and the printing unit 40 is opened toward the upper lid 30 so that the printing surface of the thermal head 12 can be visually observed. There is an effect that it is possible to prompt the user to check whether or not the ink ribbon 2 is normally stretched.

  Note that the present invention is not limited to the above-described embodiments, and it is obvious that the embodiments can be appropriately changed within the scope of the technical idea of the present invention. In addition, the number, position, shape, and the like of the constituent members are not limited to the above-described embodiment, and can be set to a suitable number, position, shape, and the like in practicing the present invention. In each figure, the same numerals are given to the same component.

1 is a schematic side view illustrating a configuration of an embodiment of a printer according to the present invention. 1 is an external perspective view showing a closed state of an embodiment of a printer according to the present invention. 1 is an external perspective view showing an open state of an embodiment of a printer according to the present invention. It is a schematic perspective view which shows the structure of the guide plate and arm part shown in FIG. It is explanatory drawing for demonstrating operation | movement of the guide plate shown in FIG. FIG. 3 is a schematic side view illustrating a configuration of a printing unit in a closed state illustrated in FIG. 2. FIG. 4 is a schematic side view illustrating a configuration of a printing unit in an open state illustrated in FIG. 3. FIG. 6 is an explanatory diagram for explaining an operation of attaching an ink ribbon to a printing unit in the printer according to the embodiment of the invention. FIG. 4 is a plan view of the printing unit shown in FIG. 3 as viewed from above.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Printing medium 2 Ink ribbon 3 Roll paper 4 Supply spool axis | shaft 5 Take-up spool axis | shaft 10 Printer 11 Platen roller 12 Thermal head 13 Supply part 14 Ribbon take-up axis | shaft 14a Take-up spool axis | shaft mounting part 15 Ribbon supply axis | shaft 15a Supply spool axis | shaft Mounting portion 16 Discharge port 17 Support shaft 20 Main body 21 Opening 22 Transmission gear 30 Upper lid portion 31 Guide plate (upper lid portion supporting means, printing unit supporting means)
31a 1st piece 31b 2nd piece 32 collar part 33 slit 34 upper lid part stopper (upper lid part support means)
35 Arm stopper (printing unit support means)
36 Abutting portion 40 Printing unit 41 Arm portion 41a Notch 41b Protruding portion (release prevention means)
42 Right Ribbon Frame 43 Left Ribbon Frame 44 Adjustment Shaft 45 Eccentric Member 50 Ribbon Cover 51 Rotating Shaft 52 Insertion Path 53 Contacted End 60 Head Housing 61 Pressing Member 62 Spring

Claims (3)

Printing is performed by sandwiching and conveying a printing medium and an ink ribbon spanned between a ribbon take-up shaft and a ribbon supply shaft between a platen roller and a thermal head, and the thermal head and the ribbon. A printing unit including a winding shaft and the ribbon supply shaft is disposed between a main body and an upper lid portion that covers an upper portion of the main body, and the upper lid portion and the printing unit are rotatably supported by a support shaft. A printer that replaces the print medium and the ink ribbon by opening the upper lid and the printing unit;
An upper lid support means for releasing the support of the upper lid by supporting the opened upper lid at a predetermined position and applying a force in a closing direction to the upper lid;
A printing unit supporting means for supporting the printing unit in a state where a working space is secured in the vertical direction in a state where the upper lid is supported by the upper lid supporting means;
In a state where the printing unit is supported by the printing unit support means, even if a force in a closing direction is applied to the upper lid part and the printing unit, the upper lid part is supported by the upper lid part supporting means and the A printer comprising: a release blocking unit that blocks the release of the support of the print unit by the print unit support unit.   2. The function of the release preventing unit is released by opening the printing unit toward the upper lid from a state in which the printing unit is supported by the printing unit supporting unit. Printer. The upper lid support means has one end fixed to the upper lid, the open end is inserted through the opening formed in the main body, and is formed with the same width from the open end toward the one end An arc-shaped member divided into a first piece having elasticity and a second piece formed with an upper lid stopper that supports the upper lid part by contacting the edge of the opening by the slit formed;
The release preventing means inhibits the elasticity of the first piece when the print unit is supported by the print unit support means, which is provided in the print unit and is movably inserted into the slit. 3. The printer according to claim 1, wherein the printer is a projection means.

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