JPH04137853U - small printer - Google Patents

Abstract

(57) [Summary] [Purpose] To reduce the printing energy of a small printer that prints with type made of an elastic material such as rubber, and to achieve good print quality. [Structure] The printing surface 14a of the platen 4 is made of an elastic material whose hardness is lower than that of the printing type 1. Furthermore, the material should be made of a material that exhibits little change in hardness due to temperature changes. [Effect] When the hammer 3 pushes out the back surface 1b of a group of letters in which a plurality of letters 1 are connected by the connecting portions 1a, even if the edges of the letters are deformed, the printing surface 14a also deforms to match the deformed state. , reducing the amount of crushed type.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention uses a hammer to print type made of an elastic material such as rubber with ink applied to the type surface. It is related to small printers that print by pressing onto printing paper, especially regarding their platen structure. do.

0002

[Conventional technology]

FIG. 3 is a sectional view showing the structure of a printing area of a conventional small printer. This type of conventional I will briefly explain about this small printer. Type 1 is stretched around type receiver 2. A plurality of them are arranged on a loop-shaped belt or a thin sheet-shaped connecting portion 1a. 3 is a hammer, and the printing paper 5 passes through the gap between the platen 4 and the paper guide 6 and comes out upward. It has become so. Most of the printing surface 4a of this platen 4 is made of one piece. It was made of hard materials such as resin or metal.

0003

[Problem that the idea aims to solve]

The problems of the prior art described above will be explained using FIG. 4. Figure 4 shows a conventional small printer. FIG. 3 is a cross-sectional view illustrating a printing state. The hammer 3 is powered by a motor or electromagnet (not shown). When the back part 1b of the type 1 is pressed with force, the connecting part 1a of the type expands, and the As a result, the top and bottom or left and right sides of the type 1 are deformed in the direction away from the print surface 4a, and the print paper 5 Even if the center of the type 1 reaches the printing surface 4a through the In order to print perfectly, the hammer stroke should be adjusted by the amount of deformation at the edge of the type. It was necessary to set the above setting to compress the center of the type a lot. Drawn as a dashed line on the drawing What is shown is type 11, which is assumed not to have been deformed. Type 1 looks like this If the amount of crushing is small, the edges of the characters will be chipped, resulting in printing defects. It had become. Extra amount of pressure applied to bring the ends 1c and 1d into contact with the printing surface 4a Since the back surface 1b of the typeface was also crushed a lot, it was necessary to have at least twice the dimension C.

0004 In order to print the deformed type correctly, the hammer stroke must be extremely long. You will have to increase the printing energy a lot at the edges, and in order to do that, you need to set the printing energy a little higher. did not become. General elastic materials such as rubber have a large change in hardness depending on temperature. Because the hardness increases at higher temperatures, the printing energy setting must be increased. There wasn't. This type of small printer uses a motor or electromagnet as its printing driving force. Therefore, increasing the size of motors and electromagnets goes against the current trend toward lower power consumption and lower costs. This was an issue that needed to be resolved urgently.

[0005] In order to solve this problem, this invention uses a type material for the printing surface of the platen. is made of an elastic material with low hardness, so even if the edge of the type deforms in the direction away from the platen, The purpose is to enable normal printing with less amount of printed characters and reduce printing energy. It is said that

[0006]

[Means to solve the problem]

This invention consists of a group of elastic type characters arranged around the outer periphery and connected by connecting parts. , a hammer that presses the back surface of the desired type to press it against the printing paper; A small printer consisting of a platen with a printing surface that receives type through printing paper. In this case, the printing surface of the platen is made of an elastic material having a hardness lower than that of the printing type. It is.

[0007] Furthermore, the printed surface has an elasticity that exhibits a smaller rate of change in hardness than the printed type due to temperature changes. Made up of the body.

[0008]

[Effect]

As mentioned above, the printing surface of the platen is made of an elastic material that is less hard than the type. Since the back of the type that is connected at the connecting part is pressed with a hammer, the edge of the type may be deformed. Also, normal printing is possible with a relatively small amount of printed characters being crushed.

[0009]

【Example】 Hereinafter, the structure and features of the present invention will be explained with reference to the drawings.

0010 FIG. 1 is a cross-sectional view showing the printing area structure of a small printer according to the present invention. Printed type 1 is connected to other type by the connecting part 1a, and the back part 1b fits into the hole 2a of the type receiver 2. It is positioned and tensioned. The surface of this type 1 is covered with an ink roll (not shown). The ink is applied by Hammer 3 presses back part 1b of type 1 It is installed so that it can be done. The printing surface 14a of the platen 14 is the type 1 The hardness of the material is lower than that of the elastic material. The hardness of the printing surface 14a depends on temperature changes. It is a material with little change in hardness. 5 is the printing paper, and 6 is the paper guide that guides the printing paper. be.

[0011] Next, the printing state will be explained using FIG. 2. Figure 2 explains the printing state of this invention. FIG. The type receiver 2 is located at a position where the desired type 1 faces the printing surface 14a. It stopped when it arrived. The hammer 3 moves in the printing surface direction 7 and presses the back part 1b. The printed characters 1 press against the printing surface 14a via the printing paper 5. At this time, type 1 The end portions 1c and 1d are pulled by the connecting portion 1a and deformed in eight directions. to hammer 3 Therefore, when the pressed type 1 presses the printed surface 14a, the hardness of the printed surface 14a is Since the hardness is lower than that of type 1, the printed surface 14a is deformed in the same way as the deformed shape of type 1. Therefore, the ends 1c and 1d easily come into contact with the printing paper 5. Made of elastic material such as rubber. The energy that transfers the ink applied to the printed type onto the printing paper 5 deforms the type. Printing deforms the printing surface 14a by a small amount because it requires less energy than the Printing without missing characters can be done using just the energy of the machine. Type with hammer 3 at this time The amount of crushing of 1 is smaller than that of conventional type 1, so the printing energy is lower. Significantly less ghee will be required. Even at low temperatures, the hardness of the printing surface 14a is comparable to that of type. Since it does not become higher than 1, a small and low power driving source is sufficient.

0012

[Effect of the idea]

As described above, according to the present invention, the printing surface of the platen is made of an elastic material such as rubber. By using an elastic material with lower hardness than printed type, printing energy is significantly reduced. The drive source can be made smaller, and the printing quality is good without chipping at the edge of the characters. There is an effect that you can get from a printer.

[0013] Furthermore, by making the printing surface an elastic material whose hardness changes little due to temperature changes, It becomes possible to further reduce the power of the drive source.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view showing the printing area structure of a small printer according to the present invention.

FIG. 2 is a sectional view illustrating the printing state of the present invention.

FIG. 3 is a sectional view showing the structure of a printing area of a conventional small printer.

[Figure 4] Cross-sectional view explaining the printing state of a conventional small printer

[Explanation of symbols]

1 Print 2 Type receiver 3 Hammer 14 Platen 14a Print surface 5 Printing paper

Claims (2)

[Scope of utility model registration request] 1. A group of elastic type characters arranged around the outer periphery of which a plurality of type characters are connected at connecting parts, a hammer that presses the back surface of the desired type to press it against printing paper, and a hammer that prints the pressed type. What is claimed is: 1. A small-sized printer comprising a platen having a printing surface that receives paper through the paper, wherein the printing surface of the platen is an elastic body having a lower hardness than the printed characters. 2. The small-sized printer according to claim 1, wherein the printing surface is an elastic body whose rate of change in hardness due to temperature changes is smaller than that of the printed characters.