JPH0444109A - Electric device - Google Patents

Abstract

PURPOSE:To improve the resistance against the external noise like the static electricity, etc., by providing a 1st - 3rd optical communication means and a 1st - 3rd communication detecting means into a dividable exterior and converting them into the optical signals to communicate data optically. CONSTITUTION:The 1st and 3rd optical communication means 6 and 12 are provided to one of both divided exterior to convert the electric signals into the optical signals together with the 1st and 3rd communication detecting means 7a and 7b which detect whether the means 6 and 12 are communicatable or not. At the same time, a 2nd optical communication means 8 is added to the other exterior to convert optical signals into the electric signals together with a 2nd communication detecting means 9 which detects whether the means 8 is communicatable or not. Then the means 6 and 8 are set opposite to each other at a prescribed position where the exterior is not divided. At the same time, both means 8 and 12 are set opposite to each other at a prescribed position where the exterior is divided. In such a constitution, the optical communication is attained at both positions where the exterior is divided and not divided respectively. In addition, the working states of a non-divided and divided electric devices are displayed.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a signal transmission device for an electrical device with a split exterior, such as a laser printer or a hand belt converter.

(Prior Art) Signal transmission in a laser beam printer (hereinafter referred to as LBP), which is an example of a conventional electric device whose exterior can be divided into two, will be described below.

FIG. 4 is a block diagram of a conventional LBP.

In FIG. 4, (1) is the CP that controls the operation of the LBP.
U, (2) is a control board on which the CPU is mounted, (3) is a display means for displaying the operating status of the LBP, (4) is a display drive means for driving the display means (3), and (5) is the above-mentioned A display board (13) is mounted with the display means (3) and the display means (4), and (13) is mounted with the control board (2) and the display board (5).
) to connect...-ness.

Figures 5(a) and 5(b) show conventional LBPs, respectively.
FIG.

In FIGS. 5(a) and 5(b), the symbols (1) to
(5) is the same as shown in FIG. (10) is L
A control board (2) with the CPU (1) mounted therein is disposed in the lower exterior of the BP. Also, (11) is L
A display board (5) on which the display means (3) and the display driving means (4) are mounted is disposed in the upper exterior of the BP.

Here, the upper exterior (11) and the lower exterior (10) are connected to the fulcrum (B
) in the direction of arrow A, the control board (
2) and the display board (5) are arranged as shown in the figure. (14) is a paper cassette.

Next, its operation will be explained.

First, the CPU (1) controls the display driving means (4) via the NES (13) to display the operating state of the LBP on the display means (3).

If some trouble (for example, paper jam) occurs during printing of LBP, the CPU (1) detects the trouble, controls the display driving means (4), and informs the display means (3) of the trouble (for example, paper jam). ) to display. Then, in order to eliminate the trouble, the user installs the upper exterior (1
1) and the lower exterior (10) are divided in the A direction. Said CP
U (1) uses a sensor or switch to detect the upper sheath (
11) and the lower exterior (10) are divided,
The display driving means (4) is controlled to display on the display means (3) that division is in progress (for example, DOOR0PEN). In addition, if the upper exterior (11) and the lower exterior (10) are divided and each pull is maintained, the CPU (1)
controls the display driving means (4) and displays the display means (3).
It will be displayed as under maintenance.

(Problem to be Solved by the Invention) In order to dispose a display means and a display driving means for displaying the operation of the LBP in the upper exterior, and a CPU for controlling the operation of the LBP in the lower exterior, it is necessary to Connecting... - cables became long and became a source of unnecessary radiation noise and noise intrusion 11 such as static electricity.

In addition, as a countermeasure, it is possible to perform optical communication using light, but optical communication becomes impossible in the divided state as shown in Figure 5(b), and the display of operations when divided for maintenance etc. I couldn't do it.

(Means for Solving the Problem) In order to solve this problem, the present invention provides a first optical communication means and a third optical communication means for converting an electrical signal into an optical signal, on either one of the divided exteriors. It has a first communication detection means and a third communication detection means for detecting whether the first and third optical communication means can communicate, and a second optical communication means for converting an optical signal into an electrical signal on the other exterior. a second communication detection means for detecting whether the two optical communication means are capable of communicating; the first and second optical communication means face each other at a predetermined position where the exterior is not divided; The second and third optical communication means are arranged to face each other at the position.

(Function) With this configuration, optical communication is possible between the first and second optical communication means or between the second and third optical communication means in both the undivided position and the divided position of the exterior. In addition, it is possible to display the operating status of undivided electrical equipment and the operating status of segmented electrical equipment.

(Example) Hereinafter, an LBP which is an example of the present invention will be described.

FIG. 1 is a block diagram of the LBP of this embodiment. (1
) to (5) are the same as the symbols in the conventional configuration.

(6) converts the electrical signal of the CPU (1) into light;
A first optical communication means for transmitting an optical signal; (7a) is a first optical communication means for detecting whether the first optical communication means (6) is in a transmittable state;
A communication detection means (7b) is a third communication detection means for detecting whether the third optical communication means (12) is in a transmittable state; (8) is a third communication detection means for detecting whether the third optical communication means (12) is in a transmittable state; A second optical communication means (9) receives the signal and converts it into an electrical signal, and a second optical communication means (9) detects whether the second optical communication means (8) is in a receiving state
It is a communication detection means.

FIGS. 2(a) and 2(b) are side views of the LBP of the present invention. (1) to (5), A, and (B) are the same as the conventional configuration. Further, (6) and (8) are the same as in FIG. Here, the first optical communication means (6) and the first communication detection means (7b
) means the second optical communication means (8) and the second communication detection means (
9) and as shown in FIG. 2(a), the upper exterior (11) and the lower exterior (10) are arranged so as to face each other when they are in a position where they are not divided.

Further, the third optical communication means (12) and the third communication detection means (7b
) refers to the second optical communication means (8) and the second communication detection means (7a).
), as shown in Figure 2(b), when the upper exterior (11) and lower exterior (10) are in a divided position, they are arranged so as to face each other and can communicate. .

FIG. 3 shows the first example of the LBP of this embodiment. Second optical communication means (6)
, (8) and 1st. FIG. 3 is a detailed circuit diagram of the second communication detection means (7) and (9).

(15a) to (15i) are resistances, and (16a).

(16c) is a light emitting diode of the first optical communication means (6);
(16b) is a light emitting diode of the second optical communication means (8);
(17b) is a phototransistor of the first communication detection means (7); (17a) is a phototransistor of the second communication detection means (9); (17c) is a phototransistor of the second optical communication means (8); (18a) is a phototransistor of the second communication detection means (9); ) and (18c) are transistors. The third optical communication means (12) is the first optical communication means (
6) and the third communication detection means (7b) have the same circuit as the first communication detection means (7a).

Next, the operation of this embodiment will be explained in detail.

As shown in FIG. 2(a), when the upper exterior (11) and the lower exterior (10) are in a position where they are not separated, the light emitting diodes (16a) and (16c) of the first optical communication means (6) are The phototransistor (17) of the second communication detection means (9)
a) and the phototransistor (
17c), and the light emitting diode (16b) of the second optical communication means (8) faces the phototransistor (17b) of the first communication detection means (7). In this case, the light from the light emitting diode (16b) of the second optical communication means (8) is transmitted to the phototransistor (17b) of the first communication detection means (7).
The transmittable signal L” level is received by the CPU (1
). The CPU (1) inputs this transmittable signal, determines the transmittable state, and drives the transistor (18a) via the resistor (15f) of the first optical communication means (6) to display the operating state of the LBP. , light emitting diode (16
c) is caused to emit light based on the transmitted data, and the electrical signal is converted into an optical signal. Further, the light from the light emitting diode (16a) of the first optical communication means (6) is received by the phototransistor (17a) of the first communication detection means (9), and a receivable signal "L" is detected.
” level is output to the display driving means (4).The phototransistor (17c) of the second optical communication means (8) receives the optical signal converted by the light emitting diode (16c) of the first optical communication means (6). The light is received, and the transistor (18b) is driven through the resistor (15h) to convert it into an electric signal and output it to the display driving means (4) as received data.

The display driving means (4) inputs the receivable signal and the received data, determines that the operating state of the LBP is to be displayed, and drives the display means (3) to display it. (For example, ON L I
NE) Some kind of trouble with LBP (e.g. paper jam)
When this occurs, the same operation is displayed (for example, JA
M). In order to eliminate this problem, the user moves the upper exterior (
11) and the lower exterior (10) are divided in the direction of arrow A. In this case, the third optical communication means (12) and the third communication detection means (
7b), the second optical communication means (8) and the second communication detection means (9) face each other, and the third communication detection means (7b) detects that the third optical communication means (12) is capable of communication. Shi, LBP
can be displayed to show that it has been divided. Furthermore, data and signals are optically communicated between the third optical communication means (12) and the second optical communication means (8). In this way, communication is possible even in a divided state such as maintenance, and it is possible to display the mode for each maintenance.

(Effects of the Invention) The present invention has first, third, and second optical communication means, and first, third, and second communication detection means in a divisible exterior, and converts communication data into optical signals. By using optical communication, it is possible to eliminate the noise between the boards arranged in the divided exterior, reduce unnecessary radiation noise, and provide an electrical device that is resistant to external noise such as static electricity. .

Further, it is possible to provide an electric device that has a third optical communication means, enables display and communication even when the exterior is divided, and improves processing in the divided state, such as maintenance.

[Brief explanation of drawings]

FIG. 1 is a block diagram of an LBP according to an embodiment of the present invention, FIGS. 2(a) and 2(b) are side views of the LBP of this embodiment, and FIG.
The figure shows the first example of this embodiment. The second optical communication means and the first optical communication means. A detailed circuit diagram of the second communication detection means, FIG. 4 is a block diagram of a conventional electrical device, and FIGS. 5(a) and 5(b) are side views of the conventional embodiment. (8): Second optical communication means (9): Second communication detection means (12): Third optical communication means (1) = (3) : (5) : (7a) (7b) CPU (2) Display Means (4) Display board (6): First communication detection means: Third communication detection means Control board Display driving means First optical communication means Patent application: Applicant Matsushita Electric Industrial Co., Ltd.

Claims (1)

[Scope of Claims] 1) An electrical device whose exterior is divided into two and which is controlled by a microcomputer, wherein one of the exteriors includes a microcomputer that controls the electrical device, and an electrical signal from the microcomputer. a first optical communication means and a third optical communication means for converting into optical signals, and a first communication detection means and a third communication detection means for detecting whether the first optical communication means and the third optical communication means can communicate. and a display means for indicating the status of the electrical device, a display driving means for driving the display means, a second optical communication means for converting an optical signal into an electrical signal, and a second optical communication means for converting an optical signal into an electrical signal, in another exterior. and a second communication detection means for detecting whether the communication means can communicate, and when the respective exteriors are in a position where they are not divided, the first optical communication means and the first communication detection means are connected to the second optical communication means and the second communication means. performs optical communication opposite to the communication detection means and indicates that the electrical device is in an undivided operating state;
An electrical device characterized in that the communication detection means faces the third optical communication means and the third communication detection means to perform optical communication and displays that the electrical device is in a divided operation state.