EP1405730B1 - Imprimante thermique - Google Patents

Imprimante thermique Download PDF

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Publication number
EP1405730B1
EP1405730B1 EP20030255951 EP03255951A EP1405730B1 EP 1405730 B1 EP1405730 B1 EP 1405730B1 EP 20030255951 EP20030255951 EP 20030255951 EP 03255951 A EP03255951 A EP 03255951A EP 1405730 B1 EP1405730 B1 EP 1405730B1
Authority
EP
European Patent Office
Prior art keywords
frame
platen roller
thermal printer
thermal
mounting table
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.)
Expired - Fee Related
Application number
EP20030255951
Other languages
German (de)
English (en)
Other versions
EP1405730A1 (fr
Inventor
Hiroyuki Murayama
Chikashi Osakama
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.)
Alps Alpine Co Ltd
Original Assignee
Alps Electric 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
Priority claimed from JP2002291597A external-priority patent/JP2004122646A/ja
Application filed by Alps Electric Co Ltd filed Critical Alps Electric Co Ltd
Publication of EP1405730A1 publication Critical patent/EP1405730A1/fr
Application granted granted Critical
Publication of EP1405730B1 publication Critical patent/EP1405730B1/fr
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • 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
    • B41J11/00—Devices or arrangements  of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form
    • B41J11/02—Platens
    • B41J11/04—Roller platens
    • 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
    • B41J25/34—Bodily-changeable print heads or carriages

Definitions

  • the sheet After bringing the sheet into pressure contact between the thermal head 55 and the platen roller 59, a plurality of heating elements of the thermal head 55 are selectively heated according to printing information, the sheet is fed by rotating the platen roller 59 by driving the motor 52, and thus a desired image can be printed on the sheet.
  • an FPC 9 is formed protruding and connected to the inner driving source (not shown) of the motor and the like.
  • the thermal head 10 is prevented from colliding with the roller part 4b of the platen roller 4.
  • gear box 7 that houses the plurality of gears 8 has been explained to be mounted to the first frame 2
  • the part of the gear box 7 may be formed in one body with the first frame 2, and accordingly the first frame 2 houses and supports the plurality of gears 8.
  • Fig. 11 is a schematic perspective view explaining a first frame and a second frame according to the invention
  • Fig. 12 is a perspective view in which the first frame according to the invention is mounted to the second frame according to the invention
  • Figs. 13 and 14 are enlarged views of an essential part explaining support operation of a platen roller according to the invention at a supporting hollow.
  • a first frame 22 that is open at the upper side thereof is disposed, and a second frame 23 that is open at the lower side is disposed on the side facing the first frame 22.
  • the first frame 22 is supported by a body housing (not shown) slidably to the second frame 23 side in the direction of arrow B, and the second frame 23 is mounted to the body case.
  • the first frame 22 is arranged by bending a metallic plate, and is formed with a one and another side plates 22a and 22b facing each other, wherein near the upper edge of the one and the other side plates 22a and 22b, a rotation shaft 24a of the platen roller 24 is rotatively shaft-supported.
  • discs 24c that can lift a head mounting table 30a, described later, supported on the second frame 23 side are fixed.
  • the other side plate 22b of the first frame 22 shown in Fig-11 is mounted with a gear box 25, and the rotation shaft 24a which projects from the other side plate 22b and is positioned in the gear box 25 is mounted with a gear group 26 of a plurality of gears that is connected to a driving force (not shown) comprised of a motor, thereby allowing transmission of the rotation of the driving force to the platen roller 24 through the gear group 26.
  • the second frame 23 which is disposed on the side facing the first frame 22 is arranged by bending a metallic plate and formed with a top plate 23a on the upper side, and a one side plate 23b and another side plate 23c which are made by bending downward the right and left edges of the top plate 23a such that the edges face each other, the second frame 23 having a U-shape that is open downward.
  • a coming-out preventing part 28 that can prevent the rotation shaft 24a supported by the supporting hollow 27 from coming out is provided.
  • the head mounting table 30a is elastically energized through an elastic member 29 such as a coil spring, and by the head mounting table 30a, a thermal head 30 comprised of a line head is supported.
  • the head mounting table 30a is, though not shown, formed with contact parts which the discs 24c of the platen roller 24 can contact and lift upward, and formed with non-contact parts at which the contact of the discs 24c is released, allowing the thermal head 30 to make pressure contact with the platen roller 24.
  • the discs 24c contact the contact parts to lift and move the thermal head 30 away from the roller part 24b of the platen roller 24, and when the rotation shaft 24a contacts the deep walls 27c shown in Fig. 14, the discs 24c are positioned at the non-contact parts, and thus the thermal head 30 makes pressure contact with the platen roller 24.
  • the pressure contact pressure due to the pressure contact of the thermal head 30 with the platen roller 24 causes the rotation shaft 24a to make pressure contact with the one guide faces 27a of the supporting hollows 27 so that the rotation shaft 24a is prevented from coming-out by the coming-out preventing parts 28.
  • the rotation shaft 24a turns into a coming-out prevented state
  • the first frame 22 is connected with the second frame 23, and thereby the printer enters a waiting state for printing.
  • the first frame 22 is loaded with a force in the direction opposite to the arrow B so that the rotation shaft 24a goes over the coming-out preventing parts 28 and the connection between the first frame 22 and the second frame 23 is released, forming a gap between the first frame 22 and the second, frame 23, as shown in Fig. 11.
  • the record medium can be replaced or provided from this gap.
  • the first frame 22 is slid in the direction of arrow B and the rotation shaft 24a of the platen roller 24 is supported by the supporting hollows 27, thus the platen roller 24 is caused to make pressure contact with the thermal head 30 and the rotation shaft 24a is prevented from coming-out by the coming-out preventing parts 28, which allows secure connection of the first frame 22 to the second frame 23 even without a latch member.
  • a first frame that supports a platen roller is mounted slidably along a body housing, and is attachable and detachable to and from a second frame mounted with a thermal head, and thus the platen roller and a driving source are unitized by the first frame, eliminating the conventional problem that gears collide with each other and the tips of the gears get broken, for example.
  • the platen roller can be smoothly rotated to provide a thermal printer allowing image printing with high quality.
  • an elastic member that can elastically energize the thermal head to the platen roller side is disposed, and when the first frame is mounted to the second frame, the thermal head elastically contacts with the platen roller, which enables image printing with high quality.
  • the top plate of the second frame covers the upper side of the platen roller, and thus dust or the like can be prevented from entering the printing part.
  • the first frame is disposed with a gear box housing a plurality of gears which can transmit the rotation of the driving source to the platen roller, and thus dust or the like can be prevented from entering the engaging part between the plurality of gears, thereby enabling transmission of smooth rotation to the platen roller.
  • the first frame is disposed with lock members that can restrain the movement of the first frame mounted to the second frame and can lock the first frame, and thereby the movement of the first frame mounted to the second frame is securely restrained by the lock members, which reduces the fluctuation in the pressure contact pressure of the thermal head that makes pressure contact with the platen roller to allow image printing with high quality.
  • the body housing is disposed with lock release members that can release the locking of the first frame, which provides a thermal printer that can easily release the locking of the first frame, thereby offering easy operation.
  • the lock members when the lock release members release the locking of the first frame, the lock members press the second frame so that the first frame moves away from the second frame, allowing easy ejection of the first frame after releasing the locking.
  • the second frame is disposed with a detection switch that can detect the locking of the first frame by the lock members so that printing can start only when the detection switch detects that the first frame has been locked. Thus, problems such as printing failure can be prevented.
  • lifting members When the first frame is moved to the second frame side, lifting members lift the head mounting table, and when the first frame has been mounted to the second frame, the lifting of the head mounting table by the lifting members is released so that the thermal head makes pressure contact with the platen roller, and thus, when the first frame is mounted to the second frame, the thermal head is prevented from colliding with the platen roller and damaging the platen roller.
  • the lifting members contact with contact parts to lift the head mounting table, and when the first frame has been mounted to the second frame, the lifting members are positioned at non-contact parts to release the lifting of the head mounting table. Therefore, by forming the contact parts and the non-contact parts in a simple structure on the head mounting table, the thermal head is easily lifted at the time of mounting the first frame, thereby preventing the thermal head from colliding with the platen roller.
  • thermal printer when a first frame is slid to a second frame side and a rotation shaft is engaged with supporting hollows, the rotation shaft is prevented from coming-out by coming-out preventing parts, and thus the first frame can be connected to the second frame. Therefore, if only the first frame is pulled by a certain force, the connection with the second frame can be released, and thereby a thermal printer which does not require operation of a special latch member like one used in conventional examples, and offers easy operation can be provided.
  • the rotation shaft goes over the coming-out preventing parts to be positioned at the deep part of the supporting hollows, and in addition, the rotation shaft is prevented from coming out from the supporting hollows by pressure contact pressure due to the pressure contact of a thermal head with a platen roller, which does not require a special latch member as used in conventional examples, enabling reduction in cost.
  • the coming-out preventing parts are formed of a convex part that is formed projecting from a one guide face, and since the root part of the convex part is tapered, it is easy to attach and detach the rotation shaft to and from the supporting hollows.

Landscapes

  • Electronic Switches (AREA)
  • Handling Of Sheets (AREA)

Claims (12)

  1. Imprimante thermique (1, 21) comprenant:
    un rouleau (4, 24) de platine;
    une source d'entraînement pour entraîner en rotation le rouleau de platine;
    une tête thermique (10, 30) qui inclut une pluralité d'éléments chauffants et qui peut réaliser un contact de pression avec le rouleau de platine ;
    un premier cadre (2, 22) qui supporte à rotation le rouleau de platine et qui supporte la source d'entraînement ;
    un deuxième cadre (3, 23) sur lequel est montée la tête thermique ;
    une table de montage (11) de tête qui est disposée sur un côté de plaque supérieure (3a) du deuxième cadre ;
    un élément élastique qui peut solliciter élastiquement la tête thermique vers le côté du rouleau de platine et est disposé entre la plaque supérieure du deuxième cadre et la table de montage de tête ; et
    un boîtier de corps qui supporte à coulissement le premier cadre et sur lequel est monté le deuxième cadre ,
    dans laquelle:
    le premier cadre peut coulisser le long du boîtier de corps dans une direction perpendiculaire à la direction axiale du rouleau de platine, de façon à pouvoir être attaché au deuxième cadre ou à en être détaché,
    la tête thermique (10, 30) est fixée à la table de montage de tête, et
    lorsque le premier cadre est monté sur le deuxième cadre, la tête thermique réalise un contact de pression avec le rouleau de platine dans une direction perpendiculaire à la direction dans laquelle le premier cadre est monté sur le deuxième cadre.
  2. Imprimante thermique selon la revendication 1, dans laquelle, lorsque le premier cadre (2) est monté sur le deuxième cadre (3), la plaque supérieure (3a) du deuxième cadre couvre un côté supérieur du rouleau de platine.
  3. Imprimante thermique selon la revendication 1 ou la revendication 2, dans laquelle le premier cadre (2) comporte une boîte d'engrenages (11) qui loge une pluralité d'engrenages (8) qui peuvent transmettre une rotation de la source d'entraînement au rouleau (4) de platine.
  4. Imprimante thermique selon l'une quelconque des revendications précédentes, dans laquelle:
    le rouleau (4) de platine est équipé d'éléments élévateurs (4c) qui peuvent élever la table de montage (11) de tête vers le côté de la plaque supérieure, en opposition à une force de sollicitation de l'élément élastique,
    lorsque le premier cadre (2) est déplacé vers un côté du deuxième cadre (3), les éléments élévateurs (4c) élèvent la table de montage (11) de tête afin de déplacer la tête thermique (10) en l'éloignant du rouleau (4) de platine, et
    lorsque le premier cadre (2) a été monté sur le deuxième cadre (3), l'élévation de la table de montage (11) de tête par les éléments élévateurs (4c) est relâchée, et la tête thermique (10) réalise alors un contact de pression avec le rouleau (4) de platine.
  5. Imprimante thermique selon la revendication 4, dans laquelle les éléments élévateurs (4c) sont en forme de disques, d'un diamètre supérieur à la dimension diamétrale du rouleau (4) de platine, et sont fixés à un arbre (4a) à des extrémités du rouleau (4) de platine dans une direction longitudinale de celui-ci, et la table de montage (11) de tête comporte des éléments de contact (11a), avec lesquels les éléments élévateurs (4c) peuvent établir un contact, et des éléments (11b) d'absence de contact (11b), où le contact des éléments élévateurs (4c) est relâché,
    lorsque le premier cadre (2) est en cours de montage sur le deuxième cadre (3), les éléments élévateurs (4c) viennent en contact avec les parties de contact (11a) pour élever la table de montage (11) de tête, et
    lorsque le premier cadre (2) a été monté sur le deuxième cadre (3), les éléments élévateurs (4c) sont positionnés aux éléments (11b) d'absence de contact, de sorte que l'élévation de la table de montage (11) de tête est relâchée.
  6. Imprimante thermique selon l'une quelconque des revendications précédentes, comprenant en outre des éléments de verrouillage (5) disposés sur le premier cadre (2) et des broches de verrouillage disposées sur le deuxième cadre (3), pour verrouiller le premier cadre en empêchant un déplacement du premier cadre monté sur le deuxième cadre (3) par suite de l'engagement des éléments de verrouillage avec des broches de verrouillage (12) prévues sur le deuxième cadre.
  7. Imprimante thermique selon la revendication 6, comprenant en outre des éléments de relâchement du verrouillage (6), disposés sur le boîtier de corps, pour déverrouiller le premier cadre (2).
  8. Imprimante thermique selon la revendication 7, dans laquelle, lorsque les éléments de relâchement du verrouillage (6) déverrouillent le premier cadre (2), les éléments de verrouillage (5) appuient sur le deuxième cadre (3), en amenant le premier cadre (2) à se déplacer en s'éloignant du deuxième cadre (3).
  9. Imprimante thermique selon la revendication 8, comprenant en outre un commutateur de détection (13) disposé sur le deuxième cadre (3) pour détecter que les éléments de verrouillage (5) ont verrouillé le premier cadre (2).
  10. Imprimante thermique selon la revendication 1, dans laquelle le deuxième cadre (23) comporte des cavités de support (27) qui peuvent supporter un arbre de rotation (24a) du rouleau (24) de platine, les cavités de support comportant des éléments respectifs (28) d'empêchement de sortie qui peuvent empêcher l'arbre de rotation du rouleau de platine de sortir, et, lorsque le premier cadre (22) est coulissé vers un côté du deuxième cadre (23) et que l'arbre de rotation est engagé dans les cavités de support, l'arbre de rotation est empêché de sortir par les éléments d'empêchement de sortie, ce qui permet au premier cadre d'être connecté au deuxième cadre.
  11. Imprimante thermique selon la revendication 10, dans laquelle:
    chaque cavité de support (27) comprend une première face de guidage (27a) et une autre face de guidage (27b) qui se font face à une certaine distance l'une de l'autre,
    la première face de guidage (27a) comporte l'élément (28) d'empêchement de sortie, et
    lorsque le premier cadre (22) est coulissé et connecté au deuxième cadre (23), l'arbre de rotation (24a) passe au-dessus des éléments d'empêchement de sortie et vient se positionner à une partie profonde des cavités de support, la tête thermique (30) réalisant un contact de pression avec le rouleau (24) de platine, et la pression du contact de pression de la tête thermique exercée sur le rouleau de platine empêche l'arbre de rotation de sortir des cavités de support.
  12. Imprimante thermique selon la revendication 11, dans laquelle chaque élément (28) d'empêchement de sortie comporte une partie convexe (28a) qui fait saillie à partir de la première face de guidage (27a), et une partie de racine (28c) de la partie convexe (28a) est de configuration effilée.
EP20030255951 2002-10-03 2003-09-23 Imprimante thermique Expired - Fee Related EP1405730B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP2002291597A JP2004122646A (ja) 2002-10-03 2002-10-03 サーマルプリンタ
JP2002291597 2002-10-03
JP2002379559 2002-12-27
JP2002379559 2002-12-27

Publications (2)

Publication Number Publication Date
EP1405730A1 EP1405730A1 (fr) 2004-04-07
EP1405730B1 true EP1405730B1 (fr) 2006-04-12

Family

ID=31996244

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20030255951 Expired - Fee Related EP1405730B1 (fr) 2002-10-03 2003-09-23 Imprimante thermique

Country Status (2)

Country Link
EP (1) EP1405730B1 (fr)
DE (1) DE60304531T2 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6795280B2 (ja) * 2014-05-26 2020-12-02 サトーホールディングス株式会社 プリンタ
JP2017209825A (ja) * 2016-05-24 2017-11-30 富士通コンポーネント株式会社 プリンタ

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60247580A (ja) * 1984-05-22 1985-12-07 Eimaa Denshi Kk 感熱式情報記録装置のフレ−ム構造
US5440328A (en) * 1992-10-05 1995-08-08 Atlantek, Inc. Single-pass multi-color thermal printer
JPH07256978A (ja) * 1994-03-25 1995-10-09 Sato:Kk サーマルプリンタ
FR2766411A1 (fr) * 1997-07-11 1999-01-29 Investix Sa Mecanisme d'impression thermique
US6148722A (en) * 1998-06-08 2000-11-21 Primera Technology, Inc. Compact disc and recordable compact disc thermal transfer printer
FR2786727B1 (fr) * 1998-12-02 2001-06-01 A P S Engineering Dispositif d'impression thermique a fermeture rapide
JP2003237121A (ja) * 2002-02-21 2003-08-27 Sii P & S Inc サーマルプリンタ

Also Published As

Publication number Publication date
DE60304531D1 (de) 2006-05-24
EP1405730A1 (fr) 2004-04-07
DE60304531T2 (de) 2006-12-07

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