JP2015123629A - Printer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a printer capable of reducing the number of components.SOLUTION: A printer performs printing on a label of continuous form paper while conveying the continuous form paper delivered from a paper supply section. In the printer, a light shielding claw section 38 for controlling on/off of a U-shaped sensor section 39 for detecting opening/closing of a printing head section is integrally formed in a harness cover section HC for protecting a wire harness for electrically connecting a thermal head section of a printing section and a circuit board of a control section.

Description

  The present invention relates to a printer and, for example, to a printer having a label printing function for printing desired information such as characters, symbols, figures, or barcodes on a label or the like.

  The label printer is a printer having a function of printing desired information on a continuous paper label when, for example, the continuous paper wound in a roll is fed out into a sheet and conveyed.

  In this label printer, a printing unit including a print head unit and a platen roller unit and a control unit including a circuit board and a driving body for controlling the operation of the printing unit are arranged in parallel through a center frame. Yes.

  The print head unit of the printing unit is a printing unit that prints on a continuous paper label. The print head unit, the sensor unit, and the like of the printing unit are electrically connected to the circuit board of the control unit through a wire harness.

  The above-described printer is described in, for example, Patent Document 1, and an assembly structure of a printer mechanical unit and a circuit board is disclosed. Further, for example, Patent Document 2 discloses a printer harness arrangement structure.

JP-A-7-125381 JP 2000-280572 A

  By the way, in the above printer, how to reduce the number of parts of the printer is an important issue.

  The present invention has been made from the above technical background, and an object thereof is to provide a technique capable of reducing the number of parts of a printer.

  In order to solve the above problem, the printer according to the first aspect of the present invention includes a transport unit that transports the print medium supplied from the medium supply unit, and opens and closes in a direction away from or close to the transport unit. A printing unit that is provided in a free state and includes a printing unit that performs printing on the printing medium conveyed by the conveyance unit; a control unit that includes a control unit that controls a printing operation of the printing unit; and the printing A wiring for electrically connecting the electrical circuit of the printing unit to the electrical circuit of the control unit, a sensor unit for detecting opening and closing of the printing unit, and a state of being connected to the printing unit and surrounding the wiring The provided surrounding member and the surrounding member are integrally provided, move together with the surrounding member following the opening and closing of the printing means, and act on the sensor unit to control on / off of the sensor unit. Characterized in that it comprises a working member, a.

  According to a second aspect of the present invention, in the printer according to the first aspect, the sensor unit is installed in a state of being fixed to a partition member between the printing unit and the control unit. And

  A printer according to a third aspect of the present invention is the printer according to the first or second aspect, wherein the sensor portion is constituted by a U-shaped optical sensor, and the action member is the U-shaped light. It is provided in the said surrounding member in the state which can be inserted or removed with respect to the recessed part of a sensor.

  According to the first aspect of the invention, the number of parts of the printer can be reduced by integrally forming the action member for controlling on / off of the sensor portion with the surrounding member.

  According to the second aspect of the present invention, the printer can be miniaturized by providing the sensor portion on the partition member.

  According to the third aspect of the present invention, the printer can be miniaturized by configuring the sensor unit with an optical sensor.

1 is an overall perspective view of the appearance of a printer according to an embodiment of the present invention. (A) is a conceptual diagram seen from the front side of the printer of FIG. 1, and (b) is a conceptual diagram seen from the side of the printer of FIG. FIG. 2 is a perspective view showing the inside of the printer of FIG. 1. FIG. 4 is a side view of the printer of FIG. 3. It is the expansion perspective view which looked at the printing part of Drawing 4 from the front side. FIG. 6 is a side view of the printing unit in FIG. 5. It is the perspective view which looked at the printing part of Drawing 5 from the back side. (A) is the perspective view which looked at the printing part at the time of the closed state of the print head part of FIG. 5 from the front, (b) is the perspective view which looked at the printing part at the time of the open state of the print head part of FIG. is there. It is the perspective view which extracted the printing head part of FIG. 5 and was seen from the lower side. FIG. 5 is a perspective view showing a right side surface and a plane of a frame portion of the print head portion. It is a perspective view which shows the left side surface and plane of a flame | frame part of FIG. It is a perspective view which shows the back surface of the flame | frame part of FIG. It is an enlarged front view of the harness cover part seen from the center frame side. It is a side view of the harness cover part of FIG. It is a perspective view of the frame part of a center frame and a print head part. FIG. 16 is a perspective view of the frame portion of FIG. 15 with the head base removed. It is the perspective view of the center frame seen from the printing chamber side. It is a top view of the center frame seen from the control room side.

  Hereinafter, an embodiment as an example of the present invention will be described in detail with reference to the drawings. Note that components having the same function are denoted by the same reference symbols throughout the drawings for describing the embodiment, and the repetitive description thereof will be omitted.

  The direction in which continuous paper (printing medium) is transported for printing, specifically, the direction in which continuous paper is fed from the paper supply unit to the thermal head unit is referred to as the printing direction. Means the upstream side in the printing direction, and the downstream in the transport direction means the downstream side in the printing direction.

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

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

  The front cover portion 2 in front of the printer 1 is provided with an operation panel portion 3, a power switch 4, and an issue port 5.

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

  An open cover portion 6 is mounted on one side surface of the printer 1 so as to be opened and closed in the vertical direction by two hinge portions 7.

  Next, a schematic configuration of the printer 1 will be described with reference to FIG. FIG. 2A is a conceptual diagram viewed from the front side of the printer of FIG. 1, and FIG. 2B is a conceptual diagram viewed from the side of the printer of FIG. In the following description, the front side (front cover portion 2 side) of the printer 1 is the front (downstream side in the continuous paper transport direction), and the back side (back cover portion side) opposite the rear side (upstream in the continuous paper transport direction). Side).

  Inside the printer 1, a printing chamber PR and a control chamber CR are arranged in parallel via a center frame (partition member) CF.

  The printing room PR is a room for printing on a label or the like of the continuous paper P. In the room, a paper supply unit (medium supply unit) 10 disposed behind the printer 1 and a printing unit disposed in front are provided. 11 and an ink ribbon portion 12 disposed above the head 11.

  The printing unit 11 is a component that performs printing on a label or the like of the continuous paper P, and includes a print head unit (printing unit) 13, a support base 14 disposed below the print head unit 13, and a damper unit disposed behind them. 15.

  The print head unit 13 includes a thermal head unit 18 that performs printing on a label or the like of the continuous paper P. As indicated by an arrow A1, the print head unit 13 is separated from the platen roller unit (conveying unit) 23 of the support base 14 (opens). Direction) and a direction close to the platen roller portion 23 of the support base 14 (closed direction) and is pivotally fixed inside the printer 1 in a swingable state.

  The control room CR is a room for accommodating a control means such as a control circuit or a control device for controlling the printing operation of the printing unit 11, and in the room, various types such as a circuit board CS for print control are provided. A driving body such as a circuit board, a motor, etc., and their accessory parts are installed.

  The center frame CF is a wall member that partitions the printing chamber PR and the control chamber CR. The center frame CF is formed with a through hole TH connecting the printing chamber PR and the control chamber CR. As shown in FIG. 2B, the through-hole portion TH is formed in a planar arc shape along the trajectory of the opening / closing operation of the print head portion 13.

  The thermal head unit 18 of the print head unit 13 and the circuit board CS of the control chamber CR are electrically connected by a wire harness (wiring) WH. A harness cover portion (enclosure member) HC is attached to the surface of the print head portion 13 that faces the center frame CF.

  The harness cover part HC is a member that mainly protects the wire harness WH during the opening / closing operation of the print head part 13, and is formed in a box shape so as to surround the wire harness WH. The harness cover portion HC is fitted in the through hole portion TH of the center frame CF, and can move in the through hole portion TH following the opening / closing operation of the print head portion 13 as indicated by an arrow A2. It is possible.

  Next, a specific internal structure example of the printer 1 will be described with reference to FIGS. 3 is a perspective view showing the inside of the printer of FIG. 1, and FIG. 4 is a side view of the printer of FIG.

  The paper supply unit 10 is a component that supplies continuous paper (printing 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 supports the continuous paper P wound up in a roll shape in a rotatable state. The roll guide portion 10b is a component that fixes the roll-shaped continuous paper P, and is installed so as to be movable 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 at predetermined intervals along the longitudinal direction. A 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 peeled off. Further, a position detection mark indicating the position of the label is formed on the surface of the mount on which the label is not attached at predetermined intervals along the longitudinal direction. The label may be either thermal paper or plain paper. In the case of thermal paper, a thermal coloring layer that forms a specific color (black, red, etc.) when a predetermined temperature range is reached is formed on the surface.

  Further, there are two types of continuous paper P, a front winding label and a back winding label. The front wound label is wound in a state where the label of the continuous paper P is positioned on the outer peripheral surface of the roll-shaped continuous paper P, and as shown in FIG. 4, the continuous paper Ps (P: broken line) is the paper supply unit. 10 is extended toward the bottom of the printing unit 11 from the center in the height direction. On the other hand, the back-wrapped label is wound in a state where the label of the continuous paper P is located on the inner peripheral surface side of the roll-shaped continuous paper P, and as shown in FIG. : Solid line) is fed out from the inner bottom surface of the printer 1 toward the bottom of the printing unit 11. Note that the sheet passing route of the continuous paper P (Ps, Pb) in the printing unit 11 is the same for the front winding and the reverse winding. Further, the continuous paper P is transported with the surface (printed surface) on which the label is temporarily attached facing upward, whether it is a front wound label or a back wound label.

  The print head portion 13 of the print portion 11 described above is installed on the support base 14 so as to be freely opened and closed as described above. When the print head unit 13 is closed (close to the platen roller unit 23), a paper passage route (medium conveyance path) is formed between the print head unit 13 and the support base 14. . The paper passing route is connected to the above-described 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 raised, and the print head portion 13 is opened (separated from the platen roller portion 23). Yes.

  The damper unit 15 is a component that applies tension to the continuous paper P. In the present embodiment, the damper portion 15 includes an outer damper portion 15a and an inner damper portion 15b. When the print head portion 13 is closed, the outer damper portion 15a and the inner damper portion 15b are installed in a swingable state so that tension can be applied to the continuous paper P, respectively.

  The above-described ink ribbon unit 12 is a component that supplies and winds up an ink ribbon coated with printing ink, and includes a ribbon supply unit 12a and a ribbon winding unit 12b disposed on the front side thereof. . The ribbon supply unit 12a is a component that supports the ink ribbon wound up in a roll shape in a rotatable state. The ribbon winding unit 12b is a component that winds and collects the printed ink ribbon RB. When an ink ribbon is used, the ink ribbon drawn out 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 passes through the damper unit 15 to the paper passing route between the print head unit 13 and the support base 14. In the middle of the printing, a printing process is performed on a label or the like of the continuous paper P, and then the paper is discharged from the issuing port 5 to the outside of the printer 1.

  Next, a specific configuration example of the printing unit 11 described above will be described with reference to FIGS. 5 is an enlarged perspective view of the printing unit of FIG. 4 viewed from the front side, FIG. 6 is a side view of the printing unit of FIG. 5, FIG. 7 is a perspective view of the printing unit of FIG. FIG. 8A is a perspective view of the print unit when the print head unit is closed in FIG. 5 as viewed from the front. FIG. 8B is a perspective view of the print unit when the print head unit is in FIG. FIG. 9 is a perspective view of the print head portion of FIG. 5 extracted from the lower side.

  The print head unit 13 has a head frame on one side surface of the print head unit 13 such that a front portion thereof can swing up and down (that is, open and close) about a rear rotation shaft S1 (see FIGS. 7 and 9). 17 is supported. In the head frame 17 of the print head portion 13, the harness cover portion HC (see FIG. 7) is attached to the surface facing the center frame CF (see FIG. 2).

  On the lower surface of the print head unit 13 (the surface facing the paper passing route), the thermal head unit 18 (see FIG. 8B and FIG. 9) is installed with the print surface facing the paper passing route. The thermal head unit 18 is a printing unit that performs printing on a label or the like of the continuous paper P by a heating resistor of a printing line 18L disposed on the printing surface. In the printing line 18L, a plurality of heating resistors (heating elements) that generate heat when energized are arranged along the width direction of the continuous paper P (direction perpendicular to the conveyance direction of the continuous paper P).

  Concave claw portions 19 and 19 (see FIGS. 8B and 9) are provided on the lower surface of the front side of the print head portion 13 so as to sandwich the thermal head portion 18 therebetween. Further, pins 20, 20 projecting outward from both side surfaces of the print head portion 13 are provided behind the concave claw portion 19 on the lower surface of the print head portion 13.

  Such a print head unit 13 is urged in the opening direction by a torsion spring 21 mounted on the rotation shaft S1 (see FIGS. 7 and 9), but is not applied to the pins 20 and 20 below the print head unit 13. The closed state is maintained by the locking claw portions 22 and 22 of the support base 14 being caught. When the head lock lever portion 16 is pulled in the right direction in FIG. 6, the lock claw portion 22 moves in the right direction in FIG. When the lock 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.

  Further, when the print head unit 13 is in the closed state, the concave claw portions 19 and 19 (see FIGS. 8B and 9) of the print head unit 13 are connected to the platen shaft S2 of the platen roller unit 23 (FIGS. 5, 6, and FIG. 8), and the printing surface of the thermal head portion 18 is placed on the lower platen roller portion 23 (see FIGS. 5, 8A, and 8B) by a pressing device provided on the print head portion 13. ).

  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 route, and is supported in a state of being rotatable in the forward and reverse directions. It is fixed to a support frame 14a (see FIGS. 5 and 6) of the base 14.

  A gear G1 (see FIG. 7) is connected to one end of the platen roller portion 23 in the axial direction of the platen shaft S2. The platen shaft S2 on the gear G1 side is engaged with a rotation shaft of a driving body (not shown) such as a stepping motor via a timing belt (not shown), for example. Further, the gear G1 is connected to the gear G4 via the connecting gears G2 and G3 (see FIG. 7).

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

  During the printing process, the thermal head unit 18 is pressed against the platen roller unit 23, and the continuous paper P is rotated by rotating the platen roller unit 23 with the continuous paper P sandwiched between the thermal head unit 18 and the platen roller unit 23. Transport. Then, the print timing is determined based on the information detected by the paper position detection sensor, and the print line 18L is printed by the print signal transmitted from the circuit board CS of the control chamber CR shown in FIG. 2 to the thermal head unit 18 through the wire harness WH. The heating resistor is selectively heated. Thus, desired information such as characters, symbols, figures, barcodes, or the like is printed on the label of the continuous paper P while the continuous paper P is being conveyed.

  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 rotation shaft S3 (see FIGS. 6 and 8). ) Is supported by the damper support member 25 in a state in which the rear portion is swingable in the vertical direction. In addition, the coil spring 26 of FIG. 7 is a member that supports the outer damper portion 15a in a swingable state while preventing the outer damper portion 15a from going too far upward (rear side).

  Further, when the side surface of the printing unit 11 is viewed, the inner damper unit 15b of the damper unit 15 extends obliquely downward from the rear side toward the front side, as opposed to the outer damper unit 15a, and rotates on the rear side. Centering on the axis S4 (see FIGS. 6 and 8), the front part is supported by the rear part of the outer damper part 15a so as to be swingable in the vertical direction.

  During the printing process, the paper contact portion of the inner damper portion 15b is located downstream of the continuous paper P conveyance with respect to the paper contact portion of the outer damper portion 15a. That is, the paper contact portion of the inner damper portion 15b is disposed 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 15 b is disposed between the paper contact portion of the outer damper portion 15 a and the inner bottom surface of the printer 1.

  In addition, 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 and S4. The width adjustment guide unit 27 is a component that abuts both ends in the width direction of the continuous paper P conveyed from the paper supply unit 10 and guides the conveyance of the continuous paper P. The width adjustment guide portion 27 is connected to a guide operation portion 28 on the back side of the outer damper portion 15a. The guide operation unit 28 is a knob for moving the width adjustment guide unit 27 according to the width of the continuous paper P and fixing the position of the width adjustment guide unit 27.

  The damper support member 25 that supports the outer damper part 15a of the damper part 15 is in a state in which the rear part can swing up and down around the rotation axis S5 (see FIGS. 6 and 7) on the front part side. Is supported in the printer 1.

  Further, the damper support member 25 has a rear portion that opens upward with the torsion spring 30 (see FIG. 7) attached to the rotation shaft S5 around the rotation shaft S5 (see FIGS. 6 and 7) (damper portion). 15 is lifted in the direction of lifting.

  Next, the frame part and the harness cover part of the print head part 13 will be described with reference to FIGS. 10 is a perspective view showing the right side and the plane of the frame portion of the print head portion, FIG. 11 is a perspective view showing the left side and the plane of the frame portion of FIG. 10, and FIG. 12 is a perspective view showing the back of the frame portion of FIG. 13 is an enlarged front view of the harness cover portion viewed from the center frame side, FIG. 14 is a side view of the harness cover portion of FIG. 13, FIG. 15 is a perspective view of the frame portion of the center frame and the print head portion, and FIG. FIG. 17 is a perspective view of the center frame seen from the printing chamber side, and FIG. 18 is a plan view of the center frame seen from the control chamber side.

  The frame portion 13F of the print head portion 13 (see FIG. 9 and the like) includes a head frame 17 and a head base 35. A head base 35 is attached to a surface of the head frame 17 on the printing chamber PR (see FIG. 2) side so as to be perpendicular to the surface. The thermal head portion 18 (see FIG. 9 and the like) is held on the lower surface of the head base 35. Further, the concave claw portion 19 is integrally formed with the head base 35.

  Further, as shown in FIGS. 11 and 12, the harness cover portion HC described above is attached to the surface of the head frame 17 that faces the center frame CF (see FIGS. 2, 15 to 18, etc.). The harness cover portion HC is formed in, for example, a rectangular box shape, and a part of the harness cover portion HC is fitted in the hole portion 36 of the head frame 17 as shown in FIGS. 10, 15, and 16. The hole 36 is formed in the head frame 17 so as to penetrate the center frame facing surface and the head base mounting surface.

  As shown in FIGS. 12 to 14, a through-hole portion 37 that connects the inside and outside of the harness cover portion HC is formed in the outer peripheral portion of the harness cover portion HC. As shown in FIG. 2, the wire harness WH electrically connected to the thermal head portion 18 and the like in the printing chamber PR is surrounded by the harness cover portion HC and the through hole portion of the harness cover portion HC. 37 is led into the control room CR and is electrically connected to the circuit board CS and the like in the control room CR.

  Here, since the wire harness WH moves following the opening / closing operation of the print head portion 13, if the harness cover portion HC is not provided, the wire harness WH contacts the center frame CF or the like, or the wire harness WH is damaged. In some cases, this may interfere with the opening and closing operation of the print head unit 13. On the other hand, in the present embodiment, since the wire harness WH can be protected by providing the harness cover portion HC, the wire harness WH is damaged due to the opening / closing operation of the print head portion 13 or the like. Can be prevented. Further, since the wire harness WH is surrounded by the harness cover portion HC, it is possible to prevent a problem that the wire harness WH hinders the opening / closing operation of the print head portion 13.

  As shown in FIGS. 11, 13, and 14, a light-shielding claw portion 38 is integrally formed on the outer surface of the harness cover portion HC on the surface opposite to the through-hole portion 37. The light-shielding claw portion 38 is a working member that acts on the sensor portion 39 (see FIGS. 11, 13, and 14) to turn the sensor portion 39 on and off.

  The sensor unit 39 is an electronic component that detects the open / closed state of the print head unit 13. The sensor unit 39 is formed by, for example, a U-shaped optical sensor, and a light emitting unit and a light receiving unit are disposed on the opposing surface in the recess. By configuring the sensor unit 39 with an optical sensor that can be downsized, the printer 1 can be downsized.

  Moreover, as shown in FIG. 17, the sensor part 39 is being fixed to the one end side of the extending direction in the through-hole part TH of the center frame CF in the state which the recessed part side faced the harness cover part HC. By providing the sensor unit 39 within the range of the thickness dimension of the center frame CF in this way, the printer 1 can be reduced in size compared to the case where the sensor unit 39 is provided outside the center frame CF. In addition, the sensor part 39 is arrange | positioned in the back side of the frame part shown by code | symbol SA in FIG.

  The above-described light-shielding claw portion 38 is installed in the harness cover portion HC so as to enter the concave portion of the sensor portion 39 when the print head portion 13 is closed. When the light shielding claw 38 enters the recess of the sensor unit 39, the light emitted from the light emitting part of the sensor unit 39 is blocked by the light shielding claw 38 and is not received by the light receiving unit. As a result, since the sensor unit 39 is turned off, it is recognized that the print head unit 13 is closed.

  On the other hand, the light-shielding claw portion 38 is installed on the harness cover portion HC so as to be pulled out from the concave portion of the sensor portion 39 when the print head portion 13 is opened. When the light blocking claw 38 is separated from the sensor unit 39, the light emitted from the light emitting unit of the sensor unit 39 is received by the light receiving unit. As a result, since the sensor unit 39 is turned on, it is recognized that the print head unit 13 is open.

  Here, in the printer examined by the inventor, since the on / off control part of the sensor unit for detecting the open / closed state of the print head unit and the harness cover unit are separate, the number of parts increases and the cost of the printer increases. There's a problem. In addition, downsizing of the printer may be hindered. On the other hand, in the present embodiment, the number of parts can be reduced by forming the light shielding claw portion 38 integrally with the harness cover portion HC. For this reason, the cost of the printer 1 can be reduced. In addition, downsizing of the printer 1 can be promoted.

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

  In the above-described embodiment, the case where a continuous paper in which a plurality of labels are temporarily attached to a mount is used as a printing medium has been described. However, the present invention is not limited to this. For example, a continuous surface having an adhesive surface on one side It is also possible to use, as a printing medium, a film that can be printed by a thermal head, not limited to a continuous label (label without mount), a continuous sheet having no adhesive surface (continuous sheet), or paper. The mountless label, continuous sheet or film can have position detection marks. Further, when carrying a non-mounting label where the adhesive is exposed, a roller containing silicone can be provided while the conveyance path is non-adhesive coated.

  In the above embodiment, the case where the sensor unit 39 that detects the open / close state of the print head unit 13 is configured by an optical sensor has been described. However, the present invention is not limited to this. A contact-type sensor such as a switch may be used.

  In the embodiment, the sensor cover 39 for detecting the open / closed state of the print head unit 13 is installed on one end side in the extending direction of the through hole TH, and the harness cover unit is closed when the print head unit 13 is closed. The HC shading claw portion 38 is configured to enter the recess of the sensor portion 39, but is not limited to this, for example, the sensor portion 39 is installed on the other end side in the extending direction of the through hole portion TH, When the print head portion 13 is opened, the light shielding claw portion 38 of the harness cover portion HC may enter the recess of the sensor portion 39.

  In the above embodiment, the case where the sensor unit 39 for detecting the open / close state of the print head unit 13 is provided in the through hole TH of the center frame CF has been described. However, the present invention is not limited to this. For example, it may be provided on the print chamber PR side (for example, in the axial direction of the platen roller portion 23 and in the vicinity of the end on the center frame CF side).

  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 is not limited to this. For example, the present invention is not limited to this. The present invention may also be applied to an online printer in which an input operation is performed via a personal computer.

DESCRIPTION OF SYMBOLS 1 Printer 10 Paper supply part 11 Print part 13 Print head part 14 Support stand 15 Damper part 17 Head frame 18 Thermal head part 18L Print line 23 Platen roller part 35 Head base 36 Hole part 37 Through-hole part 38 Light-shielding claw part 39 Sensor part PR Printing chamber CR Control chamber CF Center frame TH Through hole WH Wire harness HC Harness cover P, Ps, Pb Continuous paper

Claims (3)

A transport unit that transports the print medium supplied from the medium supply unit, and is provided in a state that can be opened and closed in a direction away from or close to the transport unit, and is transported by the transport unit. A printing unit comprising printing means for performing printing,
A control unit comprising control means for controlling the printing operation of the printing unit;
Wiring for electrically connecting the electrical circuit of the printing unit to the electrical circuit of the control unit;
A sensor unit for detecting opening and closing of the printing means;
An enclosing member provided in a state of being connected to the printing means, and enclosing the wiring;
An action member that is provided integrally with the surrounding member, moves together with the surrounding member following the opening and closing of the printing means, and acts on the sensor portion to turn the sensor portion on and off;
A printer comprising:   The printer according to claim 1, wherein the sensor unit is installed in a state of being fixed to a partition member between the printing unit and the control unit. The sensor unit is composed of a U-shaped optical sensor,
The printer according to claim 1, wherein the action member is provided on the surrounding member in a state in which the action member can be inserted into and removed from the concave portion of the U-shaped optical sensor.

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