WO2020100758A1 - プリントヘッドユニットの支持構造及びプリンタ - Google Patents

プリントヘッドユニットの支持構造及びプリンタ Download PDF

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Publication number
WO2020100758A1
WO2020100758A1 PCT/JP2019/043952 JP2019043952W WO2020100758A1 WO 2020100758 A1 WO2020100758 A1 WO 2020100758A1 JP 2019043952 W JP2019043952 W JP 2019043952W WO 2020100758 A1 WO2020100758 A1 WO 2020100758A1
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WO
WIPO (PCT)
Prior art keywords
head unit
print head
pressing member
spring holder
thermal head
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2019/043952
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
厳 松嶋
剛男 小味山
洋之 安田
克宣 清水
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Citizen Systems Japan Co Ltd
Citizen Watch Co Ltd
Original Assignee
Citizen Systems Japan Co Ltd
Citizen Watch Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Citizen Systems Japan Co Ltd, Citizen Watch Co Ltd filed Critical Citizen Systems Japan Co Ltd
Publication of WO2020100758A1 publication Critical patent/WO2020100758A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/315—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of heat to a heat sensitive printing or impression-transfer material
    • B41J2/32—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of heat to a heat sensitive printing or impression-transfer material using thermal heads
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J25/00—Actions or mechanisms not otherwise provided for
    • B41J25/304—Bodily-movable mechanisms for print heads or carriages movable towards or from paper surface

Definitions

  • the present invention relates to a print head unit support structure and a printer.
  • the printer has a print head unit that prints on paper such as thermal paper.
  • a print head and a metal heat sink that radiates heat from the print head are integrated.
  • the print head unit is normally pressed against the platen roller by the elastic force of a spring (see, for example, Patent Document 1).
  • some print head units are removable from the printer body.
  • the spring When the print head unit is removed from the printer body, the spring is in a freely extended state. To mount the print head unit on the printer body, position the spring with respect to the print head unit. Must be performed accurately and complicated work is required.
  • the present invention has been made in view of the above circumstances, and an object of the present invention is to provide a print head unit support structure and a printer in which the print head unit can be easily attached to and detached from the printer body.
  • a pressing member having a coil spring suspended from a printer body and a spring holder fixed to a lower end of the coil spring, and a state in which the coil spring is pressed upward via the spring holder
  • a detachable print head unit capable of taking an attached state supported by a support portion formed at a predetermined position of the printer body and a detached state removed from the predetermined position, the print head unit comprising: In the attached state, the pressing member and the print head unit each have an engaging portion that engages with each other to position the pressing member with respect to the print head unit, and the pressing member includes the engaging member.
  • 3 is a support structure of a print head unit having an engagement releasing portion that is displaced in a direction in which the portion disengages from the print head unit.
  • a second aspect of the present invention is a printer including a support structure for a print head unit according to the present invention.
  • the printhead unit can be easily attached to and detached from the printer body.
  • FIG. 1 is an external perspective view showing a thermal printer that is an embodiment of a printer according to the present invention.
  • FIG. 3 is a perspective view showing a state in which a front cover of the printer is open.
  • FIG. 3 is a cross-sectional view showing a cross section along the vertical direction of the printer in the front-back direction at the closed position shown in FIG. 1.
  • FIG. 3B is an enlarged view showing details of a portion A in FIG. 3A.
  • FIG. 3 is a cross-sectional view showing a vertical cross section along the front-rear direction of the printer in the open position shown in FIG. 2.
  • FIG. 3 is an exploded perspective view showing a frame, a pressing member, and a thermal head unit that form the support structure of the thermal head unit of the present embodiment.
  • FIG. 6 is a cross-sectional view corresponding to FIG. 3A showing a main part in a state of being assembled by the support structure shown in FIG. 5. It is a figure which shows the state when seeing a thermal head unit etc. from a storage part.
  • FIG. 7 is a cross-sectional view of an essential part corresponding to FIG. 6 for explaining the operation of the support structure of the thermal head unit of the present embodiment, showing a usage state of the printer.
  • FIG. 7 is a cross-sectional view of an essential part corresponding to FIG. 6 for explaining the operation of the support structure for the thermal head unit of the present embodiment, showing the state of the removal process (No. 1) of the thermal head unit.
  • FIG. 7 is a cross-sectional view of an essential part corresponding to FIG.
  • FIG. 6 for explaining the operation of the support structure for the thermal head unit of the present embodiment, showing the state of the removal process (No. 2) of the thermal head unit.
  • FIG. 7 is a cross-sectional view of an essential part corresponding to FIG. 6 for explaining the operation of the support structure for the thermal head unit of the present embodiment, showing a detached state of the thermal head unit.
  • FIG. 6 is a cross-sectional view of a main part in the vicinity of a protrusion for explaining a state in which a protrusion having an inclined surface (guide surface) for guiding the positioning hole is engaged with the positioning hole.
  • FIG. 1 is an external perspective view showing a thermal printer 1 (hereinafter simply referred to as printer 1) which is an embodiment of a printer according to the present invention
  • FIG. 2 is a perspective view showing a state in which a front cover 3 of the printer 1 is opened
  • 3A is a cross-sectional view showing a vertical cross section of the printer 1 in the front-rear direction in the closed position shown in FIG. 1
  • FIG. 3B is an enlarged view showing details of a portion A in FIG. 3A
  • FIG. 4 is shown in FIG.
  • FIG. 3 is a cross-sectional view showing a cross section taken along a vertical plane along the front-rear direction of the printer 1 in the open position.
  • the printer 1 includes a rectangular parallelepiped casing 4 (printer main body), and a thermal head unit 30 (an example of a print head unit) described later inside the casing 4.
  • the width direction of the printer 1 is the width direction X
  • the front-back direction of the printer 1 is the front-back direction Y
  • the vertical direction of the printer 1 is the vertical direction Z.
  • the front direction is the front F
  • the rear direction is the rear B.
  • the housing 4 includes a main body 2 having an opening 2d (see FIGS. 2 and 4) at an end on the front F side of the rectangular parallelepiped, and a rotating front cover 3.
  • the front cover 3 is rotatably formed around an axis extending in the width direction X near the lower end in the upright state shown in FIGS.
  • the front cover 3 is in an upright state in a closed position in which the opening 2d is closed, and in a state in which the front cover 3 is tilted forward to the front F due to rotation (see FIGS. 2 and 4) and in an open position in which the opening 2d is opened.
  • the housing 4 has a slight gap between the upper end of the front cover 3 and the main body 2 even when the front cover 3 is in the closed position. This gap serves as a discharge port 4a for discharging the thermal paper described later from the inside of the housing 4 to the outside.
  • a storage section S which is a space for storing the roll paper P, is formed inside the housing 4.
  • the roll paper P is a long strip of heat-sensitive paper wound with its heat-sensitive surface facing outward.
  • the front cover 3 When the front cover 3 is in the open position, the roll paper P can be put into and taken out of the storage section S through the opening 2d.
  • the thermal paper unwound from the roll paper P accommodated in the accommodating portion S is arranged between the thermal head unit 30 and the platen roller 6 which will be described later and in front F thereof.
  • the sheet is discharged to the outside of the printer 1 between the fixed blade 80 and the movable blade 7a of the cutter unit 7 and further through a discharge path 4a formed in front thereof.
  • the roll paper P rotates in the counterclockwise direction R in FIG. 3A as the thermal paper is unwound.
  • a thermal head unit 30 and a fixed blade 80 are arranged facing the housing S. As shown in FIG. 3A, the thermal head unit 30 performs printing by applying pressure and heat to the heat-sensitive surface of the heat-sensitive paper unwound from the roll paper P.
  • a control board 70 that controls printer operations such as heat generation control and paper feed control for the thermal head unit 30 to perform printing is arranged.
  • the control board 70 and the thermal head unit 30 are connected to the thermal head unit 30 by a cable 60 such as a flexible flat cable (FFC).
  • FFC flexible flat cable
  • the front cover 3 has operation buttons for issuing operation commands and various settings to the printer 1 on the outer surface which is the front surface in the closed position of FIGS.
  • the operation unit 5 having a lamp and the like is provided.
  • the front cover 3 is provided with a platen roller 6 and a cutter unit 7 formed of a rubber material on the inner surface side that is the upper surface when it is in the open position in FIG.
  • the platen roller 6 is rotated by the power of a stepping motor (not shown) via a gear train.
  • the platen roller 6 is located below the thermal head unit 30 when the front cover 3 is in the closed position as shown in FIG. 3A.
  • the thermal head unit 30 is elastically pressed against the platen roller 6 by receiving a downward elastic force from the pressing member 20 described later.
  • the thermal paper unwound from the roll paper P stored in the storage section S is sandwiched between the thermal head unit 30 and the platen roller 6.
  • the heat-sensitive paper is in a state in which the heat-sensitive surface which is the outer surface of the roll paper P faces the thermal head unit 30 side and the surface on the back side of the heat-sensitive surface faces the platen roller 6 side.
  • the thermal paper is pressed from the thermal head unit 30 against the platen roller 6, and is sent to the front F by the frictional force when the platen roller 6 rotates.
  • the thermal head unit 30 generates heat as it is fed by the platen roller 6, so that printing is performed on the thermosensitive surface of the thermosensitive paper.
  • the cutter unit 7 is arranged in front of the platen roller 6 in FIG. 3B.
  • the cutter unit 7 has a movable blade 7a that is vertically movable when the front cover 3 is in the closed position.
  • the movable blade 7a moves up and down by the power of a stepping motor (not shown) via the gear train.
  • the fixed blade 80 which is located on the front side F of the thermal head unit 30 in the main body 2, is fixed facing downward.
  • the movable blade 7a of the cutter unit 7 is located below the fixed blade 80, and the thermal paper sandwiched between the movable blade 7a and the fixed blade 80 moved upward by power is sheared. Cut by force.
  • the thermal paper cut by the movable blade 7a and the fixed blade 80 of the cutter unit 7 is separated from the roll paper P and received outside the discharge port 4a.
  • FIG. 5 is an exploded perspective view showing the frame 10, the pressing member 20 and the thermal head unit 30 which constitute the support structure of the thermal head unit 30 of the present embodiment
  • FIG. 6 is a state assembled by the support structure shown in FIG.
  • FIG. 3A is a cross-sectional view showing a main part corresponding to FIG. 3A, and FIG.
  • the thermal head unit 30 is supported by a metal frame 10 shown in FIG. 5, which is fixed to the top surface 2a of the main body 2. Since the frame 10 is fixed to the main body 2 and does not move, it can be said to be substantially a printer main body.
  • the frame 10 includes a top plate 13 extending in the width direction X of the printer 1 and parallel to the top surface 2a, and side plates 11 extending downward from both ends of the top plate 13 in the width direction X and parallel to the inner side surface 2b of the printer 1. Also, a side plate 12 parallel to the inner side surface 2c of the printer 1 is integrally formed. Both side plates 11 and 12 extend from the portion connected to the top plate 13 to the rear B as well.
  • the top plate 13 has, for example, three spring support protrusions 14 arranged along the width direction X.
  • the spring support protrusion 14 has a boss shape protruding downward.
  • the spring support protrusion 14 is tightly fitted inside the upper end portion of the coil spring 21, which is a component of the pressing member 20 described later, to hold the coil spring 21 in a suspended state.
  • Holder guide pieces 17 are formed on both outer sides of the top plate 13 in the width direction X with respect to the three spring supporting protrusions 14, respectively.
  • the holder guide piece 17 is formed in a thin piece shape protruding downward.
  • the holder guide piece 17 is inserted into a hole 23 formed in a spring holder 22 which is a component of a pressing member 20 described later, so that the spring holder 22 that moves up and down by the expansion and contraction of the coil spring 21 moves in the front-back direction Y. To regulate or prevent fluttering (large displacement) in the front-rear direction Y.
  • Each of the side plates 11 and 12 has an emboss 16 (support portion) protruding inward in the width direction X, and a fulcrum shaft 15 (support portion) protruding inward in the width direction X behind the emboss 16.
  • the emboss 16 and the fulcrum shaft 15 are formed at substantially the same height position (position in the vertical direction Z).
  • the emboss 16 is formed on the front side F of the spring support protrusion 14
  • the fulcrum shaft 15 is formed on the rear side B of the spring support protrusion 14.
  • the left and right embossments 16 and 16 have a lower surface adjacent to the side of a heat sink 31 which is a component of the thermal head unit 30 and which is arranged between the side plates 11 and 12 and extends in the width direction X, which will be described later.
  • the left and right fulcrum shafts 15, 15 have notches 33, 33 formed in the side portions of the heat sink 31 hooked from above. As a result, the thermal head unit 30 is supported by the frame 10.
  • the thermal head unit 30 is formed by integrally forming a thermal head 39, in which a large number of heating elements are arranged along the width direction X, and a heat sink 31, which is made of metal and has a flat plate shape.
  • the thermal head 39 is connected to the control board 70 by a cable 60, and the control board 70 controls the heat generation of each heating element to cause the contacted portion of the thermal paper to develop color for printing.
  • the heat sink 31 is formed to be longer than the thermal head 39 in the width direction X, and when arranged between the side plates 11 and 12 of the frame 10, the length such that the lower surfaces adjacent to both sides are simultaneously placed on the left and right embosses 16 and 16. Is formed in. Notches 36 are formed on both sides of the heat sink 31 in the vicinity of the center in the front-rear direction Y so that the embosses 16 can escape.
  • the width of the heat sink 31 is formed smaller than the dimension between the tips of the left and right embosses 16, 16.
  • the notch 36 passes through the embosses 16 in the up-down direction, and the position of the heat sink 31 with respect to the emboss 16 can be moved up and down.
  • Notches 33 are formed at the rear of both sides of the heat sink 31 so that the lower end is open and the upper end is closed.
  • the notches 33 are formed between two claws on both sides of the heat sink 31 that extend downwards from the portions slightly apart in the front-rear direction Y.
  • the fulcrum shaft 15 of the frame 10 can be inserted into the notch 33 from below, and the closed portion of the upper end abuts against the fulcrum shaft 15 so that the lower surfaces adjacent to both sides become the left and right fulcrum shafts 15, 15. Get caught at the same time.
  • the thermal head unit 30 is restricted in displacement in the front-rear direction Y, and only the upward movement of the fulcrum shaft 15 from the notch 33 is allowed. It becomes a state.
  • Positioning holes 35 (engaging portions) penetrating in the thickness direction of the heat sink 31 are formed in the front portion of the heat sink 31 near both side edges in the width direction X, respectively.
  • the positioning hole 35 engages with a protrusion 24 (engagement portion) formed on the lower surface of a spring holder 22 which is a component of the pressing member 20 to be described later, so that the spring holder 22 relative to the thermal head unit 30 moves in the front-back direction.
  • Position Y Positioning holes 35 (engaging portions) penetrating in the thickness direction of the heat sink 31 are formed in the front portion of the heat sink 31 near both side edges in the width direction X, respectively.
  • the positioning hole 35 engages with a protrusion 24 (engagement portion) formed on the lower surface of a spring holder 22 which is a component of the pressing member 20 to be described later, so that the spring holder 22 relative to the thermal head unit 30 moves in the front-back direction.
  • a protrusion protruding upward is formed on the upper surface of the heat sink 31, and instead of forming the protrusion 24 in the spring holder 22, the protrusion of the heat sink 31 is engaged. You may form the positioning hole which does.
  • a pressing member 20 is arranged between the frame 10 and the thermal head unit 30.
  • the pressing member 20 includes, for example, three coil springs 21 and a box-shaped spring holder 22 having an open upper end.
  • the spring holder 22 holds the lower ends of the three coil springs 21 on the bottom surface of the box, and prevents the lower ends of the three coil springs 21 from moving independently.
  • the spring holder 22 has a horizontal surface 25 in which the coil spring 21 of the pressing member 20 is fitted to the spring supporting protrusions 14 and is hung from the top plate 13 to be in a horizontal state on the lower surface corresponding to the back side of the bottom surface.
  • the rear surface of the front-rear direction Y has an inclined surface 26 that is inclined rearward and upward with respect to the horizontal plane 25.
  • protrusions 24 are formed on the front portions of the horizontal surface 25 near both sides.
  • the protrusion 24 and the above-described positioning hole 35 are formed at corresponding positions (same positions) in the width direction X.
  • the pressing member 20 is suspended from the top plate 13 of the frame 10 by fitting and holding the upper ends of the three coil springs 21 to the spring supporting protrusions 14 of the top plate 13 of the frame 10, respectively. Become.
  • the self-weight of the coil spring 21 and the weight of the spring holder 22 act on the coil spring 21, which allows the coil spring 21 to move freely. It is in a stretched state.
  • the thermal head unit 30 When the printer 1 is in use, the thermal head unit 30 is held above the embossing 16 and the fulcrum shaft 15, and the upper surface of the heat sink 31 arranged on the upper surface side of the thermal head unit 30 has the spring holder 22.
  • the spring holder 22 is pushed up by coming into contact with the horizontal surface 25 of FIG.
  • the projection 24 formed on the horizontal surface 25 of the spring holder 22 engages with the positioning hole 35 formed in the heat sink 31, and the spring holder 22 moves in the front-back direction Y with respect to the thermal head unit 30.
  • the displacement is restricted, and the thermal head unit 30 is positioned in the front-rear direction Y.
  • each coil spring 21 is in a state of being compressed to less than its free length, and the spring holder 22 has the hole 23 in which the holder guide piece 17 is inserted. It is in the state of being
  • the coil spring 21 is largely bent by the guiding action of the holder guide piece 17 and the hole 23, and the pressing member 20 is moved to the thermal head unit. It can be prevented from coming off from the upper surface of 30. Therefore, the load for pressing the thermal paper can be appropriately applied to the thermal head unit 30.
  • each coil spring 21 is contracted to less than its free length
  • the heat sink 31 causes a downward restoring force (elastic force) via the spring holder 22 according to the contracted length of the coil spring 21. Is pressed.
  • the thermal head unit 30 is directed downward and corresponds to the restoring force (elastic force) of the coil spring 21.
  • the pressing force is working. This pressing force is the pressure with which the thermal paper is pressed against the platen roller 6 from the thermal head unit 30.
  • the spring holder 22 has fulcrum protrusions 27 projecting upward from the upper edge extending in the horizontal direction at the rear portions of both side walls of the box.
  • the fulcrum protrusion 27 is formed on the rear side B in the front-rear direction Y with respect to the rear end edge of the horizontal surface 25 (the switching position with the inclined surface 26).
  • the upper end of the fulcrum protrusion 27 should not contact the top surface of the top plate 13 when the thermal head unit 30 is held above the emboss 16 and the fulcrum shaft 15 and the coil spring 21 is compressed. It is set. On the other hand, when the coil spring 21 is further contracted, the upper end of the fulcrum protrusion 27 is set to contact the top surface of the top plate 13.
  • the fulcrum protrusion 27 and the inclined surface 26 are an example of an engagement releasing portion that cooperates with each other to displace the positioning hole 35 and the protrusion 24 in a direction for releasing the engagement.
  • FIG. 8 is a use state
  • FIG. 9 is a thermal head unit 30.
  • 10 shows the state of the removal process (No. 1)
  • FIG. 10 shows the state of the removal process (No. 2) of the thermal head unit 30
  • FIG. 11 shows the removal state of the thermal head unit 30.
  • thermal head unit 30 Since the thermal head unit 30 is mainly attached and detached via the heat sink 31, the thermal head 39 is omitted in each of FIGS. 8 to 10 and only the heat sink 31 is shown.
  • the fulcrum shaft 15 is engaged with the notches 33 formed in the side portions of both sides of the heat sink 31 to be adjacent to both sides.
  • the lower surface of the heat sink 31 is supported by the emboss 16 formed on the front side F of the fulcrum shaft 15.
  • the thermal head unit 30 is positioned with respect to the frame 10 in the front-rear direction Y and the vertical direction Z.
  • the thermal head unit 30 is substantially positioned with respect to the frame 10 also in the width direction X.
  • the pressing member 20 presses the heat sink 31 downward due to the elastic force of the coil spring 21, and the thermal head unit 30 applies pressure to the thermal paper that is the printing target.
  • the pressing member 20 is positioned in the front-rear direction Y with respect to the thermal head unit 30 because the protrusion 24 is inserted into the positioning hole 35 of the heat sink 31.
  • the heat sink 31 is inclined so that the rear portion is lifted up.
  • the spring holder 22 which is in contact with the heat sink 31 at the horizontal plane 25
  • the coil spring 21 is bent and the horizontal plane 25 is placed at the heat sink 31. Inclining together with the heat sink 31 so as to keep in contact with.
  • the fulcrum protrusion 27 formed on the rear part of the upper end of the spring holder hits the inner surface (top surface) of the top plate 13. Since the fulcrum protrusion 27 is formed on the rear side B of the horizontal plane 25 on which the load lifted via the heat sink 31 is applied, the spring holder 22 has the top surface and the fulcrum protrusion 27 as the center. A moment is generated that rotates in the clockwise direction shown. Moreover, the bent coil spring 21 also has a bending moment that tries to restore the posture in which the coil spring 21 is suspended straight in the vertical direction.
  • the spring holder 22 rotates clockwise, which is the opposite direction, with respect to the heat sink 31 that is rotated counterclockwise and inclined, and the protrusion 24 formed on the spring holder 22 is positioned on the heat sink 31. After coming out of the hole 35, the positioning of the spring holder 22 with respect to the heat sink 31 is released.
  • the spring holder 22 returns to the posture in which the bending of the coil spring 21 is suspended straightly, the horizontal surface 25 is separated from the heat sink 31, and the rear inclined surface 26 is in contact with the heat sink 31.
  • the heat sink 31 Since the protrusion 24 and the positioning hole 35 are disengaged from each other, the heat sink 31 is not restricted in displacement in the forward direction F, and is in an inclined posture in which the fulcrum shaft 15 is removed from the notch 33, as shown in FIG. Until then, the heat sink 31 is pulled out to the front F along the inclination direction.
  • the front part of the heat sink 31 is lowered downward so as to further strengthen the inclined posture of the heat sink 31. Then, as shown by the chain double-dashed line in FIG. 11, the notch 36 can pass through the emboss 16, and the heat sink 31 can be moved below the emboss 16.
  • the thermal head unit 30 can be pulled out from the housing portion S to the outside of the main body portion 2 by pulling out the heat sink 31 in the forward direction F along the inclination direction thereof, as shown in FIG.
  • thermal head unit 30 When the thermal head unit 30 is attached to the main body 2, the order of the operations described above may be reversed in time series.
  • the thermal head unit 30 of the present embodiment when the thermal head unit 30 is attached to the main body 2, it is not necessary to set the lower ends of the plurality of coil springs 21 one by one at predetermined positions of the thermal head unit. That is, the pressing member 20 in the present embodiment integrally holds the lower ends of the three coil springs 21 by the spring holder 22, and the thermal head unit 30 does not position each of the three coil springs 21 and does not have one coil spring 21. Positioning only with the spring holder 22 is sufficient.
  • the support structure of the thermal head unit 30 of the present embodiment of the present embodiment and the printer 1 including this support structure can facilitate the positioning operation of the thermal head unit 30.
  • the thermal head unit 30 is moved to the rear B while being placed on the emboss 16 in the inclined posture (downward posture), and the projection 24 is inserted into the positioning hole 35 to perform the thermal operation.
  • the head unit 30 and the spring holder 22 can be positioned.
  • the thermal head unit 30 is attached or detached with the upper cover exposed to a large work space, such as when the thermal head unit 30 is provided on the upper cover that opens and closes upward with respect to the main body,
  • the thermal head unit 30 is attached / detached by inserting a hand into the narrow interior of the main body 2 with the front cover 3 opened, like the printer 1 of the present embodiment, a simpler operation can be realized. it can.
  • the fulcrum protrusion 27 and the inclined surface 26 are applied as the engagement releasing portion that releases the engagement between the positioning hole 35 and the protrusion 24.
  • the fulcrum protrusion 27 does not have to be formed on the spring holder 22.
  • fulcrum protrusion 27 formed on the spring holder 22 when the spring holder 22 is lifted upward, the spring holder 22 hits the rear portion of the upper end of the spring holder 22 and rotates the spring holder 22 clockwise. It is also possible to apply a fulcrum protrusion formed by protruding downward from the top surface of 13. The fulcrum protrusion formed in this manner and the inclined surface 26 cooperate with each other to form an example of an engagement releasing portion that displaces the positioning hole 35 and the protrusion 24 in a direction in which the engagement is released.
  • the engagement releasing portion in the printer and thermal head unit supporting structure according to the present invention may be any one as long as it has a function of releasing the engagement between the positioning hole 35 and the protrusion 24, and the fulcrum protrusion 27 described above. It is not limited to the combination with the inclined surface 26.
  • the operation of lifting the rear portion of the heat sink 31 upward in order to pull out the fulcrum shaft 15 from the notch 33 is extended as it is.
  • the engagement can be released by simply lifting the rear part, so there is no need to perform another movement to release the engagement, and the operation for releasing the engagement is simplified. You can also do it.
  • the protrusion 24 as an example of the engaging portion of the present embodiment has a guide surface (for example, an inclined surface) that guides the protrusion 24 to the positioning hole 35 on the rear side in the moving direction when approaching the positioning hole 35. It is preferably one.
  • FIG. 12 is a cross-sectional view of a main part in the vicinity of the protrusion 24 for explaining a state in which the protrusion 24 having an inclined surface 24 a (guide surface) for guiding the positioning hole 35 is engaged with the positioning hole 35.
  • the spring holder 22 Since the inclined surface 24a is formed on the rear surface of the protrusion 24, the spring holder 22 is attached to the spring holder 22 in order to attach the thermal head unit 30 detached from the main body 2 to the main body 2.
  • the heat sink 31 is moved rearward B as shown in FIG. 12, when the tip of the protrusion 24 is inserted into the positioning hole 35, it is formed on the rear side of the protrusion 24 in the relative movement direction.
  • the inclined surface 24a slides down into the positioning hole 35 so as to fall downward more than in the case of a simple horizontal surface.
  • the projection 24 having the lower end formed horizontally the projection 24 having the inclined surface 24a is more likely to be guided by the positioning hole 35. This makes it easier to attach the thermal head unit 30 to the main body 2.
  • the thermal head unit is applied as the print head unit, but the support structure of the print head unit according to the present invention is not limited to the support structure of the thermal head unit, and other types of print heads are used. It can also be applied to the support structure of the unit.
  • a thermal printer is applied as a printer, but the printer according to the present invention is not limited to the thermal printer and can be applied to other types of printers.

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PCT/JP2019/043952 2018-11-13 2019-11-08 プリントヘッドユニットの支持構造及びプリンタ Ceased WO2020100758A1 (ja)

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JP2018-212674 2018-11-13
JP2018212674A JP7080569B2 (ja) 2018-11-13 2018-11-13 プリントヘッドユニットの支持構造及びプリンタ

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