JP2018130969A - Printing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce size of a printing device using a thermal head.SOLUTION: A printing device prints on recording paper sandwiched between a print head and a platen roller. A recording paper guide for forming a conveying path of the recording paper is arranged on a part of a front surface serving as a print surface side of the print head. A spring of which force acts on a side in which the platen roller is arranged is arranged on a rear surface of the print head. When the platen roller is removed, the print head and the recording paper guide move integrally to the side in which the platen roller is arranged by the spring.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a printer apparatus.

  Printers that issue receipts and the like are widely used for applications such as cash registers (registers in shops), ATMs (Automated Teller Machines) and CDs (Cash dispensers) in banks and the like. A printer that issues such receipts prints on the recording paper with a thermal head or the like while conveying the thermal paper that becomes the recording paper, conveys the recording paper to a predetermined length, and then uses a cutter to obtain the predetermined length. This cuts the recording paper.

  In such a printer apparatus, for example, a printer main body and a lid that is rotatably supported by the printer main body are provided. By opening the lid, the printer main body is formed into a roll shape. Rolled recording paper can be installed. In this case, for example, the thermal head or the like is installed in the printer body, the platen roller is installed in the lid, and the recording paper is sandwiched between the thermal head and the platen roller by closing the lid. It is. In this way, printing is performed on the recording paper with the thermal head or the like with the recording paper sandwiched between the thermal head and the platen roller.

Japanese Patent No. 2585769 JP 7-68866 A JP 2003-246104 A

  In general, as shown in FIG. 1, a heat sink 911 is attached to a thermal head 910 installed in the printer main body, and a spring (not shown) is provided on the side where the heat sink 911 is provided. Is provided. As shown in FIG. 1A, in the state where the platen roller 920 is installed, the thermal head 910 is pushed to the side where the platen roller 920 is installed by the restoring force of the spring. Therefore, as shown in FIG. 1B, when the platen roller 920 is removed, the thermal head 910 is pushed and moved to the side where the platen roller was installed by the restoring force of the spring.

  As shown in FIG. 1, the printer main body is provided with a recording paper guide 930 and a recording paper sensor 931 for detecting the recording paper in the vicinity of the portion where the platen roller 920 is installed. Usually, when the thermal head 910 is moved by the restoring force of the spring by removing the platen roller 920, the thermal head 910 and the recording paper guide 930 are prevented from coming into contact with the recording paper guide 930 or the like. A gap with a predetermined interval is provided between them. Such a gap between the thermal head 910 and the recording paper guide 930 hinders downsizing of the printer apparatus. Further, when such a gap having a predetermined interval is provided, it is necessary to make the inclination angle of the recording paper guide 930 forming the recording paper conveyance path shallow, and therefore the size of the recording paper guide 930 is large. Becomes larger and the printer device becomes larger.

  The thermal head 910 is installed with an IC (Integrated Circuit) 910a or the like protruding on the side in contact with the recording paper. When the IC 910a comes into contact with the recording paper that is thermal paper, the recording paper It may be rubbed and damaged. The IC 910a is a driving IC.

  Therefore, there is a demand for a printer device that is downsized in a printer device that uses a thermal head.

  According to one aspect of the present embodiment, in a printer device that performs printing on a recording sheet sandwiched between a print head and a platen roller, a part of the front surface on the print surface side of the print head includes the recording A recording paper guide for forming a paper conveyance path is installed, and a spring that acts on the side on which the platen roller is installed is installed on the back surface of the print head. When removed, the spring causes the print head and the recording paper guide to move together toward the side where the platen roller is installed.

  According to another aspect of the present embodiment, in a printer device that performs printing on a recording sheet, the platen roller, a frame, a print head, and a print surface side of the print head are disposed on the recording sheet. A recording paper guide that forms a conveyance path of the print head, and a heat dissipating plate that is disposed on the back surface of the print head and that can be engaged with the recording paper guide. A side projection provided on the bottom surface of the heat sink, and the frame includes a side cut corresponding to the side projection and a bottom corresponding to the bottom projection. The print head is sandwiched and fixed between the recording paper guide and the heat radiating plate engaged with each other, and the print head, the recording paper guide, and the heat radiating plate are integrated. To constitute a head unit, the head unit is characterized in that attached to the frame.

  According to the present invention, a printer apparatus using a thermal head can be reduced in size.

Sectional view of a conventional printer Sectional drawing of the printer apparatus in this Embodiment Explanatory drawing (1) of the printer apparatus in this embodiment Explanatory drawing (2) of the printer apparatus in this embodiment Explanatory drawing (3) of the printer apparatus in this embodiment Explanatory drawing (4) of the printer apparatus in this Embodiment Explanatory drawing (5) of the printer apparatus in this embodiment Explanatory drawing (6) of the printer apparatus in this Embodiment. Explanatory drawing (7) of the printer apparatus in this embodiment Explanatory drawing (8) of the printer apparatus in this embodiment.

  The form for implementing this invention is demonstrated below. In addition, about the same member etc., the same code | symbol is attached | subjected and description is abbreviate | omitted.

(Printer device)
The printer apparatus according to the present embodiment will be described with reference to FIG. 2A is a cross-sectional view of the printer device according to the present embodiment in a state where the platen roller is installed, and FIG. 2B is a cross-sectional view of the state where the platen roller is removed. .

  In the printer apparatus according to the present embodiment, a heat sink 11 is attached to the thermal head 10 installed in the printer main body, and a spring 12 is provided on the side where the heat sink 11 is provided. . As shown in FIG. 2A, in the state where the platen roller 20 is installed, the thermal head 10 is pushed to the side where the platen roller 20 is installed by the restoring force of the spring 12. Therefore, as shown in FIG. 2B, when the platen roller 20 is removed, the thermal head 10 is pushed and moved to the side where the platen roller 20 is installed by the restoring force of the spring. In the present embodiment, the thermal head 10 that is a print head is capable of printing on recording paper such as thermal paper.

  In the present embodiment, a recording paper guide 30 that forms a recording paper conveyance path (not shown) is fixed to a part of the front surface of the thermal head 10 on the printing surface side. Therefore, as shown in FIG. 2B, when the thermal head 10 is moved by the restoring force of the spring 12, the recording paper guide 30 also moves together with the thermal head 10. Therefore, in the present embodiment, the thermal head 10 and the recording paper guide are not considered between the thermal head 10 and the recording paper guide 30 without considering the gap when the thermal head 10 is moved by the restoring force of the spring 12. 30 can be formed narrowly. Further, by narrowing the interval between the thermal head 10 and the recording paper guide 30, the inclination angle of the recording paper guide 30 can be made steep, and the recording paper guide 30 can be made smaller. Therefore, in the present embodiment, the printer device can be reduced in size. Furthermore, since the recording paper guide 30 is installed so as to cover the IC 10a installed in the thermal head 10, it is possible to prevent the recording paper from rubbing in the IC 10a. A recording sheet (not shown) is conveyed between the thermal head 10 and the platen roller 20 through a conveyance path formed by the recording sheet guide 30.

  Next, the structure of the printer apparatus according to the present embodiment will be described in more detail. As shown in FIG. 3, in the printer apparatus according to the present embodiment, a heat radiating plate 11 is attached to the back surface of the thermal head 10, and a recording paper guide 30 is attached to a part of the front surface serving as a printing surface. . Therefore, the thermal head 10, the heat radiating plate 11, and the recording paper guide 30 are integrated. 3A is a perspective view of the front side of the thermal head 10, the heat radiating plate 11, and the recording paper guide 30 in an exploded state, and FIG. 3B is a thermal head 10, the heat radiating plate 11, and the recording paper guide. It is a perspective view of the front side of the state in which 30 is united. In the present embodiment, a unit in which the thermal head 10, the heat radiating plate 11, and the recording paper guide 30 are integrated may be referred to as a head unit.

  As shown in FIGS. 3B and 4, the thermal head 10 is fixed while being sandwiched between the heat radiating plate 11 and the recording paper guide 30. Specifically, side protrusions 11a are provided on the upper portions of the side surfaces on both sides of the heat radiating plate 11, and two bottom protrusions 11b are provided on the bottom surface on the lower side. The recording paper guide 30 is hooked in a U-shape corresponding to the shape of the side protrusions 11a on the upper part in the vicinity of the end portions on both sides so that it can be hooked on the side protrusions 11a of the heat radiating plate 11. A portion 30a is provided. Further, two fitting portions 30b corresponding to the shape of the bottom surface protruding portion 11b are provided on the lower bottom surface so that the bottom surface protruding portion 11b of the heat radiating plate 11 can be fitted. 4A is a perspective view of the back side of the state in which the thermal head 10, the heat radiating plate 11, and the recording paper guide 30 are integrated, and FIG. 4B is a view in FIG. It is an enlarged view of the area | region enclosed with the dashed-dotted line 4A.

  Therefore, in the present embodiment, in the state in which the thermal head 10 is sandwiched between the heat radiating plate 11 and the recording paper guide 30, the side projections 11 a of the heat radiating plate 11 are connected to the side projections 11 a of the recording paper guide 30. Each U-shaped hooking portion 30 a is hooked, and the fitting portion 30 b in the recording paper guide 30 is fitted into each bottom surface protruding portion 11 b in the heat radiating plate 11. Accordingly, the thermal head 10, the heat radiating plate 11, and the recording paper guide 30 are fixed and integrated as a head unit.

  In the printer apparatus according to the present embodiment, the head unit in which the thermal head 10, the heat radiating plate 11, and the recording paper guide 30 are integrated is attached to the frame 40 as shown in FIGS. . FIG. 5 is a perspective view of the front side of the state before the head unit is attached to the frame 40. 6A is a front perspective view of the head unit attached to the frame 40, and FIG. 6B is a rear perspective view of the head unit attached to the frame 40. FIG. is there. 7A is an enlarged view of a region surrounded by a one-dot chain line 6A in FIG. 6A, and FIG. 7B is a region surrounded by a one-dot chain line 6B in FIG. 6B. FIG.

  The frame 40 has side cut portions 41 and 42 formed in a U shape for positioning the head on both sides, and a bottom cut portion 43 formed in a U shape for supporting the head unit on the lower side. , 44. The side projection 11 a on one side of the heat sink 11 in the head unit enters the side cut 41 on one side of the frame 40, and the side projection 11 a on the other side of the heat sink 11 is on the frame 40. The side cut-in portion 42 on the other side is inserted. Further, the two bottom surface protrusions 11 b of the heat radiating plate 11 in the head unit are respectively inserted into the bottom surface cut portions 43 and 44 in the frame 40.

  In such a state, as shown in FIG. 8, the spring 12 is installed between the frame 40 and the heat sink 11 in the head unit. The spring 12 is a wound spring, and is installed so that a restoring force acts in a direction in which the spring 12 extends in a state where the spring 12 is installed between the frame 40 and the heat radiating plate 11. The spring 12 may be a leaf spring or the like other than the winding spring. Thereby, when the platen roller is installed in a printable state, a force due to a restoring force by the spring 12 is applied from the thermal head 10 toward the platen roller 20. Therefore, when the platen roller 20 is removed, the entire head unit moves to the side where the platen roller 20 is installed. 8A is a front perspective view in a state before the spring 12 is installed, and FIG. 8B is a front perspective view in a state in which the spring 12 is installed.

  In the present embodiment, as shown in FIG. 9, a transport motor 50 is further attached to the frame 40 shown in FIG. Install in position. Thereby, the printer apparatus of a structure without a cutter can be obtained.

  Further, as shown in FIG. 10, a conveyance motor 50 and a cutter unit 60 are further attached to the frame 40 shown in FIG. 8B to which the head unit is attached, and the platen roller 20 is placed at a predetermined position. Install in. Thereby, the printer apparatus of the structure which has a cutter can be obtained. The cutter unit 60 is provided with a fixed blade, a movable blade, a movable blade motor for moving the movable blade, and the like.

  In the present embodiment, when the platen roller 20 is removed, the head unit including the thermal head 10, the heat radiating plate 11, and the recording paper guide 30 moves as a unit by the restoring force of the spring 12. For this reason, it can design and produce without considering the clearance gap between the thermal head 10 and the recording paper guide 30, and a printer apparatus can be reduced in size. Further, since the IC 10 a provided in the thermal head 10 is covered with the recording paper guide 30, it is possible to prevent the recording paper from being rubbed by the IC 10 a provided in the thermal head 10.

  As mentioned above, although the form which concerns on implementation of this invention was demonstrated, the said content does not limit the content of invention.

10 Thermal head 10a IC
11 Heat sink 11a Side projection 11a
11b Bottom projection 11b
12 Spring 20 Platen roller 30 Recording paper guide 30a Hook 30b Fitting 40 Frame 41, 42 Side cut 43, 44 Bottom cut 50 Transport motor 60 Cutter

Claims (2)

In a printer that prints on recording paper,
A platen roller,
Frame,
A printhead;
A recording paper guide disposed on the printing surface side of the print head and forming a conveyance path for the recording paper;
A heat radiating plate disposed on the back surface of the print head and engageable with the recording paper guide;
Have
The heat sink has side protrusions provided on side surfaces on both sides of the heat sink, and a bottom protrusion provided on the bottom surface of the heat sink,
The frame has side cuts corresponding to the side projections, and bottom cuts corresponding to the bottom projections,
The print head is sandwiched and fixed between the recording paper guide and the heat radiating plate engaged with each other, and the print head, the recording paper guide and the heat radiating plate constitute an integrated head unit, A printer apparatus, wherein a head unit is attached to the frame. A spring disposed between the frame and the heat sink;
The printer apparatus according to claim 1, wherein the head unit is biased toward the platen roller by a biasing force of the spring.

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