JPH0657650U - Printer - Google Patents

Abstract

(57) [Summary] [Purpose] To reduce noise in printers. [Structure] The paper guide 1 is provided with a chassis cutout portion 7a of a chassis 7 via a vibration-proof member 1c on the outer periphery of a support protrusion 1d.
To fit. When using continuous paper, the upper paper feed opening 16 is closed by the paper guide 1. [Effect] The area of the opening can be reduced, and the vibration of the paper guide can be prevented.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a serial printer. More specifically, it relates to the paper guide.

[0002]

[Prior art]

 Most newly developed printers have a paper guide. This paper guide is used in a state of standing up diagonally when inserting a cut sheet into the printer and has the function of guiding in the paper width direction. Since the conventional paper guide is installed in the outer case, the positional relationship with each member inside the printer becomes inaccurate due to the accumulation of tolerances, and the opening through which the paper passes must be made larger than necessary. . For this reason, the opening area becomes large and the print sound leakage is large. Therefore, as shown in Japanese Unexamined Patent Publication No. 4-22661 shown in FIG. 5, the paper guide 1 is installed in the chassis 7 inside the printer, and an opening for passing the paper is provided by reducing the gap with the paper deflector 14. There was an attempt to reduce the noise to the minimum required.

[0003]

[Problems to be solved by the device]

 However, since the chassis 7 is vibrated by the printing operation by the print head 4, the reciprocating operation of the carriage 6 (not shown), and the paper feeding operation by the platen 3 and the platen roller 5, the paper guide 1 is installed on the chassis 7. In the printer, this vibration was directly propagated to the paper guide 1 having a large area and generated noise.

In view of the above points, the present invention aims to provide a low-noise printer by reducing the noise leakage from the inside of the printer and preventing the noise from being generated outside the outer case.

[0005]

[Means for Solving the Problems]

 In order to solve the above problems, the paper guide of the present invention is a printer having a paper guide whose mounting angle can be changed in the vicinity of a printing paper insertion port, and the paper guide is attached to a chassis inside the printer through a vibration isolating member. It is characterized by that.

Further, it is characterized in that a paper feed opening not used by the paper guide is closed.

[0007]

【Example】

 An embodiment of the present invention will be described with reference to FIGS. 1, 2, 3 and 4.

1 and 2 are sectional views of a printer showing an embodiment of the present invention. The carriage 6 having the print head 4 mounted thereon is supported by a carriage shaft 8 installed in parallel with the platen 3 so that the carriage 6 can be translated in the axial direction of the platen 3. FIG. 1 shows a case where printing is performed on continuous paper 10, and the paper guide 1 is used in a state in which it is laid horizontally. The continuous paper 10 entered from the rear paper feed opening 15 is guided by the tractor 17 to the platen 3 by the paper guide plate 12 and guided to the print head 4. The continuous paper 10 printed by the print head 4 is conveyed by the platen roller 5 and the paper feed roller 2 which are in contact with the platen 3. The continuous paper 10 sent to the paper feed roller 2 passes between the platen cover 14 and the printer case 13, which is an outer case, and is smoothly discharged to the outside of the printer.

FIG. 2 shows a case where printing is performed on the cut-sheet paper 9, and the paper guide 1 is used in an upright state. Due to its own weight, the cut paper 9 guided by the paper guide 1 smoothly enters the printer by the guide portion of the printer case 13 formed on the extension line of the paper guide 1 in the upright state, and the paper guide plate 12 is The platen 3 reaches the curved position along the curved surface. Thereafter, the platen 3 is rotated and guided to the position of the print head 4 for printing. The printed cut paper 9 is conveyed by the platen roller 5 and the paper feed roller 2 which are in contact with the platen 3, and is stocked on the platen cover 14.

FIG. 3 is a perspective view of the paper guide 1 according to the embodiment of the present invention.

The paper guide 1 basically comprises a paper guide plate 1a and a slide guide 1b. The slide guide 1b fixed movably in the width direction of the paper guide plate 1a guides the printing paper in a direction perpendicular to the paper feeding direction by moving in parallel according to the width of the printing paper. Track-shaped support projections 1d are provided on both end surfaces of the paper guide plate 1a, and rotatably support the paper guide 1 according to the type of print paper.

A vibration-proof member 1c is provided on the outer periphery of the support protrusion 1d so that the chassis 7 and the support protrusion 1d are in direct contact with each other to prevent vibration from propagating. An anti-vibration member 1e is attached to a portion of the end portion of the paper guide 1 in contact with the platen cover 14.

FIG. 4 is a diagram showing a positional relationship among the paper guide 1, the chassis 7, the platen cover 14 and the printer case 13 of the present invention. In the sheet guide 1, the chassis notch 7a of the chassis 7 has a shape in which the diagonal portion and the horizontal portion are combined, so that the sheet guide 1 is erected in the standing state when using the cut sheet 9 and the horizontal state when using the continuous sheet 10. It can be fixed in both positions, and can be removed when the paper guide 1 is not needed. When printing on the continuous paper 10, the linear portion of the support protrusion 1d of the paper guide 1 is positioned parallel to the horizontal portion of the chassis cutout portion 7a, and the paper guide 1 is in a horizontal state. The upper paper feed opening 16 is closed by the vibration isolating member 1e attached to the terminal and the platen cover 14. After printing, the continuous paper 10 conveyed by the paper feed roller 2 passes between the platen cover 14 and the printer case 13 and is discharged to the outside of the printer. When the cut sheet 9 is used, the sheet guide 1 is rotated about the support protrusion 1d covered with the vibration isolating member 1c and is pushed into the lowermost portion of the chassis cutout 7a. At this time, the surface of the paper guide 1 that guides the cut paper 9 is the same surface as the surface of the paper guide plate 13 that faces the platen 3. The cut-sheet paper 9 guided by the paper guide 1 reaches the paper guide plate 12 by its own weight, is wound around the platen 3, and is sent to the print head 4. After printing, the cut-sheet paper 9 conveyed by the paper-feed roller 2 is discharged onto the platen cover 14 and is stocked with the back surface supported by the paper guide 1.

All the members constituting the paper path of the present invention are fixed to the chassis 7, and the angle and position accuracy of the paper guide 1 are the shape accuracy of the chassis cutout 7a, the shape of the support protrusion 1d, and the vibration isolation. It depends on the thickness of the member 1c. For this reason, it is possible to ensure accurate positional accuracy as in the case of Japanese Patent Laid-Open No. 4-22661 disclosed in the conventional example. This paper path also serves as a path through which the print sound generated in the printer leaks. The paper guide 1 of the present invention closes the upper feed opening 16 that is unused when the continuous paper 10 is used, and uses the gap between the paper guide 1 and the platen cover 14 which is the paper feed path when the cut sheet 9 is used as the paper path. The minimum required size can be achieved. Further, since the paper guide 1 and the chassis 7 and the paper guide 1 and the platen cover 14 are in contact with each other via the vibration isolating members 1c and 1e and are not in direct contact with each other, vibration is not transmitted to the paper guide side.

[0015]

[Effect of device]

 In the printer of the present invention, as described above, the paper guide is fixed to the chassis via the anti-vibration member, so that it is possible to improve the positional accuracy of the paper guide and the surrounding members without transmitting the vibration to the paper guide. Since the opening area can be made small, there is an effect that the noise of the printer can be reduced. Further, when using continuous paper, the noise of the printer can be further reduced by closing the paper feed opening of the cut paper.

[Brief description of drawings]

FIG. 1 is a sectional view of a printer showing an embodiment of the present invention.

FIG. 2 is a sectional view of a printer showing an embodiment of the present invention.

FIG. 3 is a perspective view of a paper guide according to an embodiment of the present invention.

FIG. 4 is a partially enlarged view of the chassis to which the paper guide of the embodiment of the present invention is attached.

FIG. 5 is a cross-sectional view of a conventional printer disclosed in Japanese Patent Laid-Open No. 4-22661.

[Explanation of symbols]

 1 Paper Guide 1a Paper Guide Plate 1b Slide Guide 1c Anti-Vibration Member 1d Supporting Protrusion 1e Anti-Vibration Member 2 Paper Feed Roller 3 Platen 4 Print Head 5 Platen Roller 6 Carriage 7 Chassis 7a Chassis Cutout 8 Carriage Shaft 9 Single Sheet 10 Continuous paper 11 Paper guide plate 12 Paper guide plate 13 Printer case 14 Platen cover 15 Rear paper feed opening 16 Upper paper feed opening 17 Tractor

Claims (2)

[Scope of utility model registration request] 1. A printer comprising a paper guide whose mounting angle can be changed in the vicinity of a printing paper insertion port, wherein the paper guide is attached to a chassis inside the printer via a vibration isolating member. 2. The printer according to claim 1, wherein the paper feed opening that is not used by the paper guide is closed.