CN219028927U - Needle printer - Google Patents

Abstract

The utility model provides a needle printer, which comprises a machine body and a needle printing head, wherein a paper conveying mechanism is arranged in the machine body, the paper conveying mechanism comprises a paper feeding rubber roller, a paper discharging rubber roller and a bearing plate positioned between the paper feeding rubber roller and the paper discharging rubber roller, the needle printing head is arranged right above the bearing plate and can move along the length direction of the bearing plate, and the bearing plate is used for supporting paper when the needle printing head prints the paper; the inside of the machine body is also provided with a heating device which is used for conducting heat to the bearing plate and conducting heat to printed paper through the bearing plate. When the needle type printing head presses the carbonless copy paper on the bearing plate, the bearing plate heats the carbonless copy paper, so that the bearing plate can provide a proper reaction temperature for the leuco dye and the acid color developer on the carbonless copy paper, and the problem that the carbonless copy paper is in a low-temperature environment and has poor color development effect is solved.

Description

Needle printer

Technical Field

The utility model relates to the technical field of printers, in particular to a needle type printer.

Background

At present, the special printing paper of the needle printer is mostly carbonless copy paper, the carbonless copy paper is generally composed of three paper sheets, namely upper paper sheet (CB paper), middle paper sheet (CFB paper) and lower paper sheet (CF paper), microcapsule coatings are coated on the back surfaces of the upper paper sheet and the middle paper sheet, leuco dye and solvent are contained in the microcapsules, and acid color developing agents are coated on the front surfaces of the middle paper sheet and the lower paper sheet. In the printing process of the needle printer, the printing needle head impacts the carbonless copy paper to break the microcapsule on the back of the CB paper, and the leuco dye flows out to the front of the adjacent CF paper along with the solvent, contacts with the acid color developing agent and causes chemical reaction, so that the front of the CF paper develops color. Therefore, the color development effect of the carbonless copy paper is determined by the color development rate, the solvent becomes thick in a low-temperature environment, the flow rate is low, the leuco dye is often not fully contacted with the acid color developing agent, the printing needle head is withdrawn, the acid color developing agent is only contacted with a very small amount of leuco dye, and the rate of chemical reaction after the acid color developing agent and the printing needle head are contacted with the acid color developing agent is also low, so that the color development rate of the carbonless copy paper is low at low temperature, and the color development effect is poor.

In order to solve the problem that the carbonless copy paper develops color slowly at low temperature, most of the prior art focuses on improving the manufacturing process of carbonless copy paper, for example Wang Xueyi in research on improving the low temperature color development performance of carbonless copy paper, papermaking chemicals and applications, (2) p24-25 (2006) proposes a formulation for improving an acidic color developing agent, lining in China paper, (08) and p47-48 (2003) propose an increase in the particle size of microcapsules, etc., but these schemes only improve the low temperature color development performance slightly, and cannot completely solve the problem of poor color development effect in low temperature environment.

The applicant switches ideas and tries to make some improvements on the needle printer to solve the influence of low environmental temperature on the color development effect.

Disclosure of Invention

The utility model aims to solve the technical problem of providing a needle printer which can provide a proper reaction temperature for leuco dye and acid color developing agent and solve the problem of poor color developing effect of carbonless copy paper in a low-temperature environment.

The needle type printer comprises a machine body and a needle type printing head, wherein a paper conveying mechanism is arranged in the machine body and comprises a paper feeding rubber roller, a paper discharging rubber roller and a bearing plate positioned between the paper feeding rubber roller and the paper discharging rubber roller, the needle type printing head is arranged right above the bearing plate and can move along the length direction of the bearing plate, and the bearing plate is used for supporting paper when the needle type printing head prints the paper; the inside of the machine body is also provided with a heating device which is used for conducting heat to the bearing plate and conducting heat to printed paper through the bearing plate.

Compared with the prior art, the needle printer has the following advantages: the heating device conducts heat to the bearing plate and conducts heat to printed paper through the bearing plate, the highest temperature of the bearing plate can be controlled by setting the working temperature of the heating device, and when the needle type printing head presses the paper on the bearing plate, the bearing plate heats the paper, so when the paper adopts carbonless copy paper, the bearing plate can provide a proper reaction temperature for leuco dye and acid developer on the carbonless copy paper, and the carbonless copy paper is prevented from being in a low-temperature environment, so that the problem that the carbonless copy paper has poor color development effect in the low-temperature environment is solved.

Preferably, the heating device is arranged below the bearing plate or in a cavity surrounded by the bearing plate. By adopting the structure, the installation space below the bearing plate or in the cavity surrounded by the bearing plate is fully utilized, so that the heating device is closer to the bearing plate, and the heat conduction is better.

Preferably, the heating device is an electric heating rod or a heating resistance wire. By adopting the structure, the electric heating rod or the heating resistance wire can be purchased in the market, the product is mature, the heating effect is good, and the production is convenient.

Preferably, the heating device is attached to the bearing plate or embedded into the bearing plate. With the structure, the heating device is attached to the bearing plate or embedded into the bearing plate, and the heat conduction efficiency to the bearing plate is high.

Preferably, the heating device is a sheet-shaped electric heating sheet. By adopting the structure, the heating device is conveniently attached to the bearing plate or embedded into the bearing plate, and the assembly is also convenient.

Preferably, a temperature sensor is further arranged in the machine body, and the temperature sensor is used for detecting the ambient temperature of the printed paper. With this structure, the temperature sensor can detect the ambient temperature of the printed paper, so as to determine whether the printed paper is at a low temperature, and then determine whether to energize the heating device.

Preferably, the front side of the machine body is provided with a paper outlet supporting plate which is used for being connected with a paper outlet rubber roller; the temperature sensor is arranged below the paper outlet supporting plate. By adopting the structure, the installation space below the paper outlet supporting plate is fully utilized, the temperature sensor is convenient to assemble and is close to the printed paper, and the environment temperature of the printed paper is detected more accurately.

Preferably, the temperature sensor is electrically or signally connected to said heating means. By adopting the structure, the heating device can be controlled to be powered on and off through the temperature sensor, namely, when the temperature sensor detects that printed paper is in a low-temperature environment, a power supply circuit of the heating device can be connected; if the temperature sensor detects that the printed paper is not in a low-temperature environment, the power supply circuit of the heating device can be disconnected.

Drawings

Fig. 1 is a schematic view showing an external structure of a pin printer according to the present utility model.

Fig. 2 is a schematic view of the internal structure of the pin printer of the present utility model.

Fig. 3 is an enlarged schematic view of the area a in fig. 2.

As shown in the figure: 1. the machine body, 2, the bearing plate, 3, the needle type printing head, 4, the paper feeding rubber roller, 5, the paper discharging rubber roller, 6, a paper outlet supporting plate, 7, an electric heating rod, 8, a temperature sensor, 9 and carbonless copy paper.

Detailed Description

For a better understanding of the present application, various aspects of the present application will be described in more detail with reference to the accompanying drawings. It should be understood that these detailed description are merely illustrative of exemplary embodiments of the application and are not intended to limit the scope of the application in any way. Like reference numerals refer to like elements throughout the specification.

In the drawings, the thickness, size and shape of the object have been slightly exaggerated for convenience of explanation. The figures are merely examples and are not drawn to scale.

It will be further understood that the terms "comprises," "comprising," "includes," "including" and/or "having," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. Furthermore, when an expression such as "… at least one" occurs after a list of features listed, the entire listed feature is modified rather than modifying a separate element in the list.

Example 1:

as shown in fig. 1 and 2, the needle printer of the present utility model includes a main body 1 and a needle print head 3, a paper feeding mechanism is provided inside the main body 1, the paper feeding mechanism includes a paper feeding rubber roller 4, a paper discharging rubber roller 5, and a bearing plate 2 between the paper feeding rubber roller 4 and the paper discharging rubber roller 5, a paper discharging supporting plate 6 is provided at the front side of the main body 1, and the paper discharging supporting plate 6 is used for being connected with the paper discharging rubber roller 5. The needle type print head 3 is disposed right above the pressure bearing plate 2 and is movable in the longitudinal direction of the pressure bearing plate 2, and the pressure bearing plate 2 is used to support paper when the needle type print head 3 prints paper.

As shown in fig. 2 and 3, a heating device is further disposed in the machine body 1, in this embodiment, the heating device is an electric heating rod 7, the electric heating rod 7 is disposed below the bearing plate 2, two ends of the electric heating rod 7 are respectively connected to two sides of the machine body 1, and a connection mode of the electric heating rod 7 and the machine body 1 can refer to a connection mode of the paper feeding rubber roll 4 or the paper discharging rubber roll 5 and the machine body 1. The electric heating rod 7 is used for conducting heat to the bearing plate 2 and conducting heat to the printed paper through the bearing plate 2.

The below of paper delivery layer board 6 is provided with temperature sensor 8, and temperature sensor 8 is used for detecting the ambient temperature that the paper of printing was located, and temperature sensor 8 is connected or signal connection with electric bar 7 electricity. The connection between the temperature sensor 8 and the electric heating rod 7 can refer to the connection mode between the temperature controller and the power supply disclosed in the Chinese patent 20062075601. X, and in the Chinese patent 20062075601. X, when the temperature data detected by the temperature controller exceeds the specified temperature, the power supply is cut off by the temperature controller, and the circuit is disconnected and no longer heated. In this embodiment, a maximum temperature may be set for the temperature sensor 8, that is, when the temperature sensor 8 detects that the printed paper is in a non-low temperature environment, for example, higher than 5 ℃, the temperature sensor 8 disconnects the power supply line of the electric heating rod 7, so that the electric heating rod 7 will not heat; when the temperature sensor 8 detects that the printed paper is in a low-temperature environment, for example, the temperature is lower than 5 ℃, the temperature sensor 8 is connected with a power supply circuit of the electric heating rod 7, the electric heating rod 7 heats the bearing plate 2, and at the moment, when the needle type printing head presses the paper on the bearing plate, the bearing plate heats the paper, so when the paper adopts the carbonless copy paper 9, the bearing plate can provide a proper reaction temperature for the leuco dye and the acid developer on the carbonless copy paper, and the problem that the carbonless copy paper is in the low-temperature environment is solved, so that the color development effect of the carbonless copy paper is poor in the low-temperature environment is solved.

In some needle printers, the bearing plate 2 is provided with front and rear side walls and encloses a cavity, and the electric heating rod 7 is disposed in the cavity enclosed by the bearing plate 2. In other embodiments, the electric heating rod 7 can be changed into a heating resistance wire, so that the heating area is large, and the heating effect is good 2.

In other embodiments, the heating device may adopt a sheet-shaped electric heating sheet, the electric heating sheet may be fixed and attached to the lower side of the bearing plate 2 by screws, and an installation groove or an installation hole may be provided on the bearing plate 2 along the length direction of the bearing plate 2, so that the electric heating sheet is embedded into the bearing plate 2, and in this way, the electric heating sheet is in direct contact with the bearing plate, so that the heat conduction efficiency of the electric heating sheet to the bearing plate can be improved.

The foregoing is merely exemplary of the present utility model and is not intended to limit the scope of the present utility model; modifications and equivalent substitutions are intended to be included in the scope of the claims without departing from the spirit and scope of the present utility model.

Claims (8)

1. The needle printer comprises a machine body (1) and a needle printing head (3), wherein a paper conveying mechanism is arranged in the machine body (1), the paper conveying mechanism comprises a paper feeding rubber roller (4), a paper discharging rubber roller (5) and a bearing plate (2) positioned between the paper feeding rubber roller (4) and the paper discharging rubber roller (5), the needle printing head (3) is arranged right above the bearing plate (2) and can move along the length direction of the bearing plate (2), and the bearing plate (2) is used for supporting paper when the needle printing head (3) prints paper; the printing machine is characterized in that a heating device is further arranged in the machine body (1) and used for conducting heat to the bearing plate (2) and conducting heat to printed paper through the bearing plate (2).

2. A pin printer according to claim 1, wherein the heating means is arranged below the pressure plate (2) or in a cavity enclosed by the pressure plate (2).

3. A needle printer according to claim 2, characterized in that the heating means are electric heating rods (7) or heating resistance wires.

4. A pin printer according to claim 1, wherein the heating means is attached to the bearing plate (2) or embedded in the bearing plate (2).

5. The pin printer of claim 4, wherein said heating means is a sheet-like electric heating pad.

6. A pin printer according to claim 1, characterized in that the interior of the body (1) is also provided with a temperature sensor (8), the temperature sensor (8) being adapted to detect the ambient temperature of the printed paper.

7. A needle printer according to claim 6, characterized in that the front side of the machine body (1) is provided with a paper outlet pallet (6), the paper outlet pallet (6) being adapted to engage with a paper outlet glue roll (5); the temperature sensor (8) is arranged below the paper outlet supporting plate (6).

8. A pin printer according to claim 6, characterized in that the temperature sensor (8) is electrically or signally connected to said heating means.

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