JPH0634954U - Serial printer - Google Patents

Abstract

(57) [Summary] [Purpose] To prevent a decrease in print throughput caused by an increase in the atmosphere in the moving area of the carriage due to heat generation of the print head. [Structure] Fins 63 and 74 are arranged on a lower part of a carriage frame 60 or an upper part of a print head 70, notches are provided on both side frames, and an opening is provided on a bottom surface of a lower cover, so that a carriage part accompanying a printing operation A structure is provided to replace the air in the print area by utilizing the fact that the left and right move.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a carriage structure in a serial printer.

[0002]

[Prior art]

 5 and 6 show the structure of a carriage frame in a conventional serial printer and the structure of a print head mounted on the carriage frame. The platen 4 is rotatably supported by side frames 2 and 3 located on the left and right sides inside the printer cover 1, and the main shaft is supported by the side frames 2 and 3 in parallel with the platen 4 at both ends thereof. A print frame 7 is mounted on a carriage frame 6 which is rotatably supported by a main shaft 5 and which is parallel to the platen 4. A roller 8 is fixed to one end of this carriage frame 6, and it is supported by a slide guide 9, and a space belt 11 sandwiched and fixed to the lower surface of the carriage frame 6 by a belt clamp 10 is fixed to the lower surface of the carriage frame 6. The end of the space motor 12 is supported by the pulley 12 (a) and the other end is supported by the idle pulley 13, and the driving force of the space motor 12 is transmitted to the carriage frame 6 so that the space motor 12 can freely move to the left and right in parallel with the platen 4. I am trying. In addition to the print head 7, a heat sink 14 is fixed to the carriage frame 6 above the print head 7, and a head cable 15 for supplying a current to the print head 7, a ribbon protector 18, and an ink ribbon 17 supplied from an ink ribbon cassette 17 ( Ribbon guides 16a and 16b for guiding a) at the tip of the print head 7 are provided. The lower parts of the carriage frame system are the upper part of the lower frame 19 of the printer, the front part of the front cover 20 is the rear part of the shield cover 21, the front part of the platen 4 and the bale roller 22 are the side frames 2, 3 of the left and right sides. The structure is surrounded by, and the heat generated during the printing operation of the print head 7 is easily retained.

[0003]

[Problems to be solved by the device]

 However, in the apparatus having the above-described configuration, the ambient temperature around the print head 7 rises along with the printing operation of the print head 7, so that the sensor detecting the temperature rise in the print head 7 causes the print head to be transferred to the control unit. There was a problem that an alarm was issued to protect 7 and, as a result, the control was shifted to reduce the printing speed and the processing time (hereinafter referred to as throughput) was reduced.

[0004]

[Means for Solving the Problems]

 The present invention aims to reduce the decrease in throughput due to the increase in the ambient temperature of the print head described above, and the fins are provided in the space above the print head or the bottom of the carriage frame to perform the printing operation in the atmosphere inside the housing. It is configured so that the temperature rises in the moving area of the print head is reduced by moving the print head and discharging it from the opening provided in the side frame and sucking it out to replace it.

[0005]

[Action]

 In this invention, the fins are provided on the upper part of the print head or the lower part of the carriage frame, and the side frame has an opening. Therefore, when the print head is moved during printing, the above-mentioned fins are used to make the hot air in the housing effective. It expels the air and instead takes in air-temperature air.

[0006]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is an exploded perspective view of a carriage unit for explaining an embodiment of the present invention, and FIG. 2 is a side view showing a state where the carriage unit is mounted on a printer.

In FIG. 1, the carriage portion of the printer of the present invention comprises a print head 70 and a carriage frame 60.

The print head 70 includes a nose 71 protruding over the entire surface of the print head 70, a print head main body 72, a heat sink 73 provided at the rear of the main body 72, and a heat sink 73 passing from above the nose 71 to the main body 72. It is composed of a head fin 74 provided over the top.

The head fin 74 has a plate shape and is provided on a surface perpendicular to the moving direction of the carriage portion during printing. The head fin 74 is made of heat-resistant plastic and is light so that it does not become a load when moving the carriage portion. However, in order to improve the heat dissipation characteristics of the print head 70, a light metal such as an aluminum alloy is preferably used. When molded integrally with the nose 71 or the print head main body 72, the material is the same. When molding and mounting separately, you can select any material.

The carriage frame 60 is composed of a carriage frame main body 61, a print head mounting base 62 molded integrally with the carriage frame main body 61, rollers 8, and carriage fins 63 provided on the lower portion of the carriage frame 60.

The carriage fin 63 has a plate shape, and is provided on a surface perpendicular to the moving direction of the carriage portion during printing. The material of the carriage fin 63 is the same as that of the head fin 74 and is made of heat-resistant plastic, or the same as the carriage frame when formed integrally with the carriage frame, and is made of, for example, an aluminum alloy.

When the carriage unit to which the fins 74 and 63 are attached is mounted on the printer, it becomes as shown in FIG. That is, the head fins 74 and the carriage fins 63 are configured so as to close the unmounted portions in the margins as seen from the side surface of the printer. That is, when the printer main body is applied to an unmounted portion different from that shown in FIG. 2, the printer body has a different shape accordingly. As a result, the fins 74 and 63 divide the space inside the printer into left and right, and the size of the space inside the printer changes as the carriage moves. The print head 70 and the carriage frame 60 are fixed with screws 75 or the like.

FIG. 3 is a perspective view of an essential part of a printer for explaining a printer equipped with this carriage unit, and FIG. 4 is a side view thereof.

3 and 4, the side frame 20 (30 on the opposite side) has an opening 21 (31 on the opposite side). Further, the lower cover 90 that supports this also has an opening 91 (92 on the opposite side). By providing such openings 21 and 91, when the carriage portion moves in the arrow direction A, the high temperature air staying in the printer housing is effectively discharged through this as shown by arrow B. be able to. At the same time, outside air at room temperature can be sucked in through the opposite openings 31 and 92. As described above, in order to improve the passage of air, the fins 63 and 74 and the opening 21 (or 31) and the opening 91 (or 92) should be aligned in a straight line when the carriage moves. It is preferable to configure.

As described above, since the left and right air can be exchanged by the printing operation of the carriage unit, the inside of the printer housing can be easily cooled.

[0017]

[Effect of device]

 As described above in detail, according to the present invention, as a method for suppressing the rise in the ambient temperature in the moving area of the print head in the housing, the space above the print head and the space below the carriage frame where the print head is mounted are In order to prevent stagnation of air, by providing fins using each frame in the space above the print head or below the carriage frame, the movement of the carriage frame that moves parallel to the platen during the printing operation is used The air in the room is always moved by the fins without stopping, and the internal air is exhausted from the openings provided in the left and right side frames and the cover, allowing the room temperature air to be sucked in, resulting in an improvement in throughput. You can expect an effect.

[Brief description of drawings]

FIG. 1 is a perspective view of a carriage unit for explaining a printer according to an embodiment of the present invention.

FIG. 2 is a side sectional view of the printer according to the present invention.

FIG. 3 is an enlarged perspective view of a main part for explaining the operation of the printer according to the present invention.

FIG. 4 is a side sectional view for explaining the operation of the printer according to the present invention.

FIG. 5 is a plan view illustrating a conventional printer.

FIG. 6 is a side sectional view for explaining a conventional printer.

[Explanation of symbols]

 60 Carriage Frame 61 Carriage Frame Main Body 62 Print Head Mounting Base 63 Carriage Fin 70 Print Head 71 Nose 72 Print Head Body 73 Heat Sink 74 Head Fin 21,31 Opening 90 Lower Cover 91,92 Opening

Claims (1)

[Scope of utility model registration request] 1. A side frame, a main shaft spanned between the side frames, a carriage frame that moves between the side frames along a longitudinal direction of the main shaft, and a carriage mounted on the carriage frame. In a serial printer having a print head that moves with the movement of a carriage frame and performs a printing operation, and a cover that covers the print head, the movement of the print head at least on one side of the carriage frame and the print head. A serial printer having a fin having a surface perpendicular to the direction, and having an opening in the side frame.