JPH0546463U - Thermal printer - Google Patents

Abstract

(57) [Summary] [Purpose] A harness of a line head supported by a rotatable bracket is held in the bracket with a simple structure. [Structure] A rib 17 is projectingly provided in a bracket 16, and a harness 8 is arranged in a space 20 formed by the rib 17, the line head 4, and the inner surface of the bracket 16.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a thermal printer used for a label printer or the like.

[0002]

[Prior Art]

 At present, various printer devices have been put to practical use, and for example, as a device such as a label printer, a thermal printer that has a simple structure and can quietly print an image is used. Therefore, a conventional example of such a thermal printer will be described with reference to FIGS. First, in the label printer 1 which is this thermal printer, as illustrated in FIG. 5, the platen roller 2 rotatably supported is opposed to the platen roller 2 via a conveyance path 3 for a recording medium (not shown) so as to be freely separated. A heating element array (not shown) is formed in the vicinity of the front edge of the surface of the line head 4, and the line head 4 is mounted on the surface of the bracket 5 pivotally supported near the rear edge. It is finely connected. Here, the bracket 5 is formed in a box shape with an opening on the lower surface that covers the line head 4 from the back surface, and a circle for the rotating shaft 6 is formed on the side surface projecting downward near the rear edge. A through hole 7 having a shape and a rectangular through hole 9 for a harness 8 described later are formed. The harness 8 inserted into the through hole 9 is fastened with a belt 10 to the front surface of the rear wall of the bracket 5 and connected to the rear edge of the line head 4, as illustrated in FIG. ing.

In this label printer 1, springs (not shown) are actually attached to both sides of the lower surface of the bracket 5 as described above, and these springs are movably connected to the bracket 5. The two ends of the line head 4 are in contact with each other.

In such a structure, in the label printer 1, the line head 4 is supported by the rotatable bracket 5 so that it can be brought into contact with and separated from the platen roller 2, so that thermal paper or the like can be placed on the platen roller 2. You can easily set the recording medium. Then, the line head 4 is positioned and held by the rotation of the bracket 5 on the platen roller 2 on which the recording medium is set in this manner, so that the recording medium such as thermal paper conveyed on the platen roller 2 is recorded. Image printing is performed by the heat scanning of the line head 4.

[0005]

[Problems to be solved by the device]

 In the label printer 1 described above, the line head 4 facing the platen roller 2 is supported by the rotatable bracket 5 in order to simplify setting of the recording medium, so that it is connected to the rear edge of the line head 4. It is necessary to hold the attached harness 8 in the bracket 5.

Therefore, in the above-described label printer 1, the harness 8 is fastened to the front surface of the rear wall of the bracket 5 by the belt 10, but this requires the small belt 10 to be manually fixed. As a result, productivity will decrease.

Further, in the above-described label printer 1, the bracket 5 is formed in a box shape having an open lower surface, but since this is elongated in the main scanning direction, the strength in the longitudinal direction is reduced, and It impairs durability and reliability.

[0008]

[Means for Solving the Problems]

 A line is provided in which a bracket is formed in the shape of a box with the front side opened and is rotatably supported near the rear edge, and at least the back surface is located inside the opening of the bracket and the harness is connected near the rear edge. In a thermal printer in which a head is provided, and a platen is arranged at a position where the heating element arrays formed on the surface of the line head oppose each other so that they can come into contact with and separate from each other, the surface of the line head near the rear edge of the bracket Ribs facing each other are provided so as to project, and the harness is arranged in a space surrounded by the rear surface of the rib, the back surface of the line head, and the inner surface of the bracket.

[0009]

[Advantage] Since it is not necessary to fix the harness of the line head to the bracket with parts such as a belt, the structure is simple and can contribute to the improvement of the productivity of the thermal printer. The rib also improves the strength in the longitudinal direction of the bracket formed in the main scanning direction, which contributes to the improvement of reliability and durability of the thermal printer.

[0010]

【Example】

 An embodiment of the present invention will be described with reference to FIGS. First, in the label printer 11 which is the thermal printer, as shown in FIG. 3, an image printing section 13 and a sheet feeding section 14 are provided in front of and behind the main body housing 12, and the sheet feeding section 14 is a roll. A recording medium 15 such as a label sheet or a tag sheet wound in a circular shape is rotatably supported. In the image printing unit 13 that prints an image on the recording medium 15, a box-shaped bracket 16 having an open front side is rotatably provided near the rear edge, as illustrated in FIGS. 1 and 2. The heating element array of the line head 4 which is axially supported and is connected to the opening near the front edge of the bracket 16 is arranged facing the platen roller 2 via the conveyance path 3 of the recording medium 15 so that the heating element array can freely come into contact with and separate from the platen roller 2. Has been done.

Here, in the label printer 11, the bracket 16 formed in a box shape with an opening on the lower surface that covers the line head 4 from the back surface is provided on a side surface protruding downward near the rear edge portion. A circular through hole 7 for the moving shaft 6 is formed, and a rib 17 facing the back surface of the line head 4 is projectingly provided on the surface near the trailing edge. Further, in this bracket 16, a trapezoidal convex portion 18 protruding upward is formed at a portion rearward of the rib 17, and a through hole 19 for the harness 8 is formed on a side surface of the convex portion 18. ..

Therefore, in this label printer 11, the harness 8 connected to the rear edge of the line head 4 through the through hole 19 of the bracket 16 as described above is the same as the inner surface of the convex portion 18 of the bracket 16. The ribs 17 are arranged in a space 20 formed by the rear surface of the rib 17 and the back surface of the line head 4.

In this label printer 11, springs 21 are attached to both sides of the lower surface of the bracket 16, and these springs 21 are applied to both ends of the line head 4 which is finely connected to the bracket 16. Touching. Also, in this label printer 11, as shown in FIG. 3, if desired, a mount of a label sheet, which is one of the recording media 15, is bent at a steep angle in front of the image printing unit 13 having the above-described structure. A label peeling section 22 for peeling off the label (not shown) is provided in a protruding manner, and the mount of the label sheet (not shown) which is the recording medium 15 is conveyed under the label peeling section 22 and discharged to the outside. A mount carrier 23 is provided.

With this configuration, in the label printer 11, the line head 4 is supported by the rotatable bracket 16 so as to come in contact with and separate from the platen roller 2, so that the thermal paper is placed on the platen roller 2. The recording medium 15 such as the above can be easily set. Since the line head 4 is pressed and positioned and held by the elastic force of the spring 21 on the platen roller 2 on which the recording medium 15 is set in this way, the line head 4 is conveyed on the platen roller 2. A predetermined image is printed on the recording medium 15 by heat generation scanning.

Here, in the label printer 11, the line head 4 facing the platen roller 2 is supported by a rotatable bracket 16 in order to simplify setting of the recording medium 15 as described above. Therefore, similarly to the conventional label printer 1, it is necessary to hold the harness 8 connected to the rear edge of the line head 4 in the bracket 16. In the label printer 11, the harness 8 of the line head 4 is arranged in the space 20 formed by the inner surface of the convex portion 18 of the bracket 16, the rear surface of the rib 17 and the back surface of the line head 4. Since the harness 8 does not need to be fastened to the bracket 16 with a component such as a belt, the structure is simple and the productivity is good.

Further, in the label printer 11, the box-shaped bracket 16 having an opening on the lower surface is formed elongated in the main scanning direction. It has good strength and can contribute to the improvement of durability and reliability of the image printing unit 13.

The front and back and front and back of the thermal head 4 and the bracket 16 referred to in the present specification mean that the surface of the thermal head 4 on which the heating element array is located is referred to as the front surface, and the thermal head 4 with respect to the center of rotation. The side on which the heating element array is located is shown as the front side, and does not define the arrangement, direction, etc. of the components in the label printer 11.

[0018]

[Effect of the device]

 As described above, the present invention provides a bracket which is formed in the shape of a box having an open front side and is rotatably supported near the rear edge, and at least the back surface is positioned in the opening of the bracket and the rear edge is positioned. In the thermal printer in which a line head with a harness is provided in the vicinity of the part, and a platen is arranged at a position where the heating element array formed on the surface of the line head is in contact with and separated from the line head, the vicinity of the rear edge of the bracket By arranging a rib facing the back surface of the line head on the front surface of the line head and arranging the harness in a space surrounded by the rear surface of the rib, the back surface of the line head, and the inner surface of the bracket, the line head Since it is not necessary to fix the harness of this to the bracket with parts such as belts, its structure is simple and contributes to the improvement of the productivity of the thermal printer. In addition, the ribs also improve the strength in the longitudinal direction of the bracket, which is elongated in the main scanning direction like the line head, and thus contributes to the reliability and durability of the thermal printer. It has the effect of.

[Brief description of drawings]

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

FIG. 2 is a perspective view.

FIG. 3 is a vertical sectional side view showing the entire structure.

FIG. 4 is an exploded perspective view showing a conventional example.

FIG. 5 is a vertical sectional side view.

[Explanation of symbols]

 2 platen 4 line head 8 harness 11 thermal printer 16 bracket 17 rib 19 through hole 20 void

Claims (1)

[Scope of utility model registration request] 1. A harness, which is formed in a box shape having an opening on the front surface side and is pivotally supported near a rear edge portion, is provided with at least a back surface inside the opening portion of the bracket, and a harness near the rear edge portion. In a thermal printer in which a line head connected to the bracket is provided, and a platen is arranged at a position where the heating element arrays formed on the surface of the line head are opposed to each other in a freely contactable and separable manner. A thermal printer, characterized in that a rib facing the back surface of the head is provided in a protruding manner, and the harness is arranged in a space surrounded by the rear surface of the rib, the back surface of the line head, and the inner surface of the bracket.