JPS5849277A - Heat-sensitive recorder - Google Patents

Abstract

PURPOSE:To provide the titled appraratus able to satisfy various kinds of users' specifications and easy to find out a defective part by independently constructing, in circuit, a heating section and driving section by a group respectively and arranging only a circuit plate section in conformity with the users' specifications. CONSTITUTION:A heating section 1 and a driving section 2 are respectively composed of independent circuits which are grouped by a certain number of heating element 111 as a unit. An interconnecting wiring between the heating section 1 and driving section 2 is provided by a wiring of a circuit plate section 3 where also supplies them with signals and power from external sections. A content of a shift register 212 is transferred to a memory circuit 213 in accordance with a strobe signal from an electronic circuit 211, a driving circuit 211 is driven, and the required heating elements 111 generate heat crrespondingly according to a recording signal through lead wires 112. A device to be designed in conformity with a user's specifications is provided only for the circuit plate section 3. A check is conducted by each group which is divided into a small section, and it is easy to detect a failed part.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a thermal recording device that can be easily adapted to various usage methods and that can be easily checked during the manufacturing process.

A conventional device of this type is shown in FIG.

In the figure, (1111) is a heating element, and (1112) is a lead wire. Here, the heating elements (1111) are arranged in a predetermined amount of 8 dots/12 dots per millimeter. (111B) is the lead wire (111
2) is a drive circuit composed of a switch transistor, etc. that passes a drive current to the heat generating element (1111) through the drive circuit, and is controlled by a recording signal supplied from the outside through an input terminal (1114) corresponding to each drive circuit.

Usually, an input line (1116) for external recording signals 7)
In order to reduce the number of drive circuits (1118) 17) between the input terminal (1114) and the input line (1116), a diode matrix or a shift register is used to transfer recording signals from an external source to a predetermined drive circuit at a predetermined timing. A switching connection circuit (1115) is provided leading to. The method of providing a shift register as the switching connection circuit (1115) will be explained with reference to FIG.
116) are sequentially supplied to the clock signal terminals (11, 17), and are stored regularly in the order of input into the n-stage shift register (11151) under the control of a clock signal that is separately supplied to the clock signal terminals (11, 17) in synchronization with this. Ru.

The output of each stage (7) of the shift register (11151,) is supplied to the corresponding drive circuit via the memory circuit (11152), so a strobe signal is added after the storage in the shift register (11151) is completed. , when the letter signal stored in this shift register (11151) is transferred to the memory circuit (11152) corresponding to -, the memory circuit (
11151), each heating element (1111) generates heat in response to a recording signal, and recording is performed on the thermal recording paper that is in contact with the heating element. The memory circuit (1
1162) or turn off the power to the drive circuit (1118), shift the recording paper by one dot, and perform the next recording using the same procedure.

Note that (1118) is a power line.

Since the conventional device is configured as described above, it has the advantage of requiring fewer input lines.

However, since the line from the input line to the entrance of the drive circuit is integrally constructed with a shift register, it is necessary to change the configuration of the shift register or change the wiring in order to respond to changes in usage requirements such as changes in recording speed. However, with an integrated structure, each device must be individually designed to meet these requirements, which poses a problem in terms of flexibility. Furthermore, in cases where the shift register is constructed using chip ICs, all stages of the shift register are integrated, so there is a problem in that it is costly to extract a defective chip when a defect occurs.

This invention has been made to solve the above problems. Embodiments of the present invention will be described below with reference to FIG.

In the figure, (111) is a heating element, and (112) is a lead wire. Here, a plurality of heating elements (111), for example 64 (II, constitute one unit of elemental heating element on, and a plurality of sets, for example, 16 pairs of elemental heating elements 6u, constitute the heating element (]) of the thermosensitive recording device. are doing.

(Incorporated) includes a drive circuit (211) for each heating element (111) that is independently provided corresponding to one unit of elementary heating section aη,
It is a drive circuit unit equipped with a plurality of stages, for example, six shift registers (212) and a memory circuit (218) provided corresponding to the output of each stage. For example, 16 sets constitute the drive section (2) of this thermal recording apparatus. Note that in this embodiment, the heat generating part (1
) and the drive section (2) are constructed on one board (3) is an input line (801) for recording signals from the outside, a power supply line (811) for the element heating section circuit, the drive circuit section υ, etc. , recording signal line (
812) A circuit board section on which wiring such as a clock signal line (818) and an electronic circuit (814) for generating necessary signals are mounted.

The recording signal applied to the input line (1) in the form of a sequential signal is supplied to a predetermined drive circuit section 4 through the recording signal line (812) of the circuit board section (3). On the other hand, each shift register (212) is configured to operate as a required multi-stage shift register through wiring between the drive circuit section (2) provided on the circuit board section (3 sides), so that the recording signal is It arrives at the shift register at a predetermined stage while being shifted at the timing determined by the clock signal.

At this stage, the strobe signal from the electronic circuit (814) transfers the contents of the shift register to the memory circuit (218) and drives the drive circuit (211), which causes the required heating element (111) to respond to the recording signal through the lead (112). and develop a fever.

The heat generating part (1) and the driving part (2) each have an independent circuit configuration for each group of a plurality of heat generating elements as a unit, and they are mutually wired by the wiring of the circuit board part (3) and connected to the outside. Therefore, if the user has various specifications, the configuration of the circuit board section (3) should be designed to accommodate these specifications. For example, the circuit board section ( We will prepare two types of configurations for 3).

The present invention is constructed as described above, and when the user has various specifications, the heat generating part (1) and the driving part (2) with a complicated structure are prepared with common specifications, and the circuit board part with a simple structure ( 3)
This is very effective in terms of cost reduction, reliability, E, etc., since it is possible to respond by preparing a product designed according to the user's specifications.

In addition, when the drive unit is configured with a chip IC, the check is performed for each group divided into small sections, so it is extremely easy to find any malfunctions, which is also effective in improving productivity. be.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing an example of a conventional device, and FIG. 2 is a diagram showing an embodiment of the present invention. (111)... Heat generating element, (112)... Lead wire, aυ... Elementary heat generating part, (1)... Heat generating part, (211
)...Drive circuit, (212)...Shift register,
(218)...Memory circuit, Binding...Drive circuit section, (
2)...Drive unit, (810)...Input line, (811
)...power line, (812)...recording signal line, (81
8) Clock signal line for (814)...electronic circuit,
(3)...Circuit board section. Agent Makoto Kuzuno - Figure 1 Figure 2

Claims (1)

[Claims] A heat generating section having a plurality of groups of elementary heat generating sections constituted by a plurality of heat generating elements as a group, and a first heat generating section provided independently corresponding to the elementary heat generating sections and recording signals supplied from the outside.
a first component comprising a drive circuit section that sequentially stores the recording signal at a timing of , and causes a drive current corresponding to the recording signal to flow through each heating element individually at a second timing; a second component including wiring that leads the electronic circuits to respective electronic circuits in a predetermined order set according to an operation mode of the first component.