JPS6218945A - Connecting method for motor - Google Patents

Abstract

PURPOSE:To decrease the number of connecting parts such as a connector plug, etc. by using the sockets for flat cables and by using the flat cables as the lead wires of astepping motor. CONSTITUTION:As for the connecting method of a motor, a socket 48 for flat cables are used, while a flat cable 47 is used as a lead wire of the motor 41. In addition, an end of this flat cable is uncoated to a necessary length to expose a terminal conductor 47a. Then the terminal conductor 47a formed at an end of this flat cable 47 is directly inserted to the socket 48 for flat cables. With the connecting method as constituted above for the motor, the number of connecting parts such as connector plugs, etc. are decreased for driving astepping motor.

Description

[Detailed description of the invention] Ki 4 minutes 1 This invention was used in printers and electronic typewriters.

It relates to a motor connection method suitable for use with motors installed for positioning control in various electronic devices such as facsimiles and floppy disks, and in particular, it relates to connection parts for driving stepping motors for positioning control. Reliability is improved by preventing incorrect connection of lead wires by reducing the number of parts and simplifying one assembly process. Also, by eliminating mistakes during assembly due to the reduction in the number of connection parts, The present invention relates to a motor connection method that makes it possible to eliminate the inspection process and achieve cost reduction.

Conventional technology Stepping motors have traditionally been used to control positioning in printers' type selection motors, space motors, ribbon feed motors, paper feed motors, and various electronic devices such as electronic typewriters, facsimile machines, and floppy disks. Because of this, it is widely used.

FIG. 4 is a plan view showing a schematic structure of a printing mechanism inside a conventionally used serial printer. In the drawing, 1 and 2 are knobs, 3 is a frame, 4 is a platen, 5 is a line feed motor, 6 is a gear train, 7 and 8 are paper pressing rollers, 9 is a rod, and 10
is a stay, l is a carriage, 12 is a cassette wheel, 13 is its type wheel, 14 is its cassette case, 15 is a printing hammer, 16 is a selection motor,
17 is a space motor, 17a is its rotating shaft, 18 is a timing roller, 19 is a ribbon cassette, 19a and 19b are its reels, 20 is an ink ribbon, 21 and 22
is a carriage feeding roller, 23 is a timing belt,
24 to 27 indicate hooks.

A platen 4 for holding printing paper is rotatably attached to the frame 3, and a line feed motor 5 for feeding the printing paper is also fixed.

The platen 4 is driven by the rotation of a line feed motor 5 via a gear train 6.

Rotatable rollers 7 and 8 for pressing the paper are attached to the platen 4, and the loaded paper is pressed into contact with the surface thereof. Also.

Knobs 1 and 2 fixed to both ends of the platen 4 are manually operated when loading or unloading paper.

Furthermore, a rod 9 and a stay 10 fixed to the frame 3
A carriage 11 is placed above the platen 4 so as to be movable in parallel with the axial direction of the platen 4 .

The carriage 11 includes a cassette wheel 12 in which a type wheel 13 is housed in a cassette case 14, a printing hammer 15, a selection motor 16, and the like.

Note that the cassette wheel 12 is configured to be replaceable with a simple operation.

The carriage 11 is moved via a timing belt 23 that transmits the rotation of a space motor 17 mounted on the frame 3. That is, the timing belt 23 is fixed to the lower part of the carriage 11 and is stretched by a timing roller 18 attached to the rotating shaft 17a of the space motor 17, rollers 21, 22, etc. also attached to the frame 3.

Further, the ink ribbon 20 wound around the reels 19a and 19b of the ribbon cassette 19 is mounted between four hooks 24 to 27 attached to the frame 3, and is mounted on the platen 4.
and the type wheel 13. The ink ribbon 20 is moved along the printing direction by a ribbon feed motor and a feeding direction switching mechanism (not shown).

FIG. 5 is a functional block diagram showing an example of a control section of the serial printer shown in FIG. 4. The symbols in the drawings are the same as in FIG. 4, and 28 is a programmable
29 is a printer control circuit that controls the entire printer; 30 is a line feed motor driver; 31 is a carriage control circuit; 32
is a space motor driver, 33 is a hammer magnet driver, 34 is a hammer magnet, 35 is a hammer, 36 is a selection control circuit, 37 is a selection motor driver, 38 is a photosensor, 39
indicates the ribbon feed motor/driver, 40 indicates the ribbon feed motor, SPD indicates space data, SLD
is the selection data, RED is the ready signal, PM is the home pulse, LD is the drive pulse of the line feed motor 5, DSP is the drive pulse of the space motor 17, DH is the drive pulse of the hammer magnet 34, D
SL is the drive pulse of the selection motor 16, DR
indicates the drive pulse of the ribbon feed motor 40.

Next, the operation of the control section shown in FIG. 5 will be briefly explained.

Various motors 5, 17° 16. provided in this control section.
40 and the hammer magnet 34 are sent from a host system such as a computer or word processor (not shown) to the printer via the printer interface circuit 28 as various data such as type data, space data, and line feed data. The signal is applied to the control circuit 29.

The printer control circuit 29 performs necessary control based on the input data. The printer control circuit 29, carriage control circuit 31, and selection control circuit 36 are each composed of a microcomputer including a CPU, a program memory such as a ROM, a data memory such as a RAM, and an input/output device.

For example, in the case of a paper feed operation for a line feed,
Output a drive pulse DL to the line feed motor driver 30 to drive the line feed motor 5,
The platen 4 is rotated by one line to move the paper wrapped around the platen.

In addition, when controlling the printing position, it is monitored whether or not the ready signal RED is input from the carriage control circuit 31, and when the ready signal RED is input, the step number of the space motor 17 is used to control the print position. Space data SPD is output to the carriage control circuit 31, which includes data on the amount of movement of the carriage 11, rotation direction data indicating the direction of rotation, timing data for starting movement, and the like.

The carriage control circuit 31 outputs a drive pulse DSP according to the input space data SPD, drives the space motor 17, and moves the carriage 11 by a predetermined amount in the instructed direction.

Furthermore, in the hammer drive for printing operation, a drive pulse DH is output to the hammer magnet driver 33 to drive the hammer magnet 34 of the printing hammer 15, and the hammer 35 drives the type body provided on the type wheel 13. Let me hit it.

Similarly, in the case of type selection, the selection control circuit 3
When the ready signal RED is input from 6, rotation amount data indicating the rotation amount from the current position of the type wheel 13 to the required type position by the number of steps of the selection motor 16, and rotation direction indicating the rotation direction. Selection data SLD consisting of data, rotation timing signals, etc. is output to the selection control circuit 36.

The selection control circuit 36 selects selection data SL.
In response to D, a drive pulse DSL is generated to drive the selection motor 16 and rotate the type wheel 13 by a predetermined amount in a predetermined direction. This selection control circuit 36 also serves as a determination means, and specifies initial state settings from the printer control circuit 29, stores data, and home pulse PM from the photosensor 38.
The home position of the type wheel 13 is determined by
It is applied to the printer control circuit 29.

Furthermore, in the ribbon feeding operation, the ribbon feed motor
A drive pulse DR is output to the driver 39 to drive the ribbon feed motor 40.

The ink ribbon 20 of the ribbon cassette 19 is moved by a predetermined amount.

In this way, in the case of a printer, the line feed motor 5
, space motor 17. A large number of stepping motors are used as the selection motor 16 and ribbon feed motor 40 for positioning control.

Figures 6 (1) and (2) are schematic structural diagrams showing an example of the connection circuit between the motor and the motor drive signal line in a conventional printer, and Figure (1) shows the state of connection between the motor and the connector plug. , Figure (2) is an enlarged view of the main part of the pin member of the connector plug. In the drawing.

41 is a motor, 42 is a connector plug, 43 is a lead wire, and 44 is a pin member of the connector plug 42.

As shown in FIG. 6 (1), in the conventional printer,
A so-called discrete cable is used as the lead wire 43, which is a signal wire for driving the motor.

The motor 41 and the lead wires 43 are connected by soldering, and the other end of each lead wire 43 is connected to the motor 41 by soldering.

Connector-plug 42 is connected thereto.

In this case, each lead wire 43 is fixed by crimping the pin member 44 of the connector plug 42 with a crimping tool, and is inserted into a housing made of an insulating material, as shown in the enlarged view in FIG. 6(2). be done. In this way, a connector plug assembly is created.

The following Figures 7 (1) and (2) are schematic structural diagrams showing an example of a conventional method of connecting a connector plug on the motor side and a printed circuit board equipped with a socket for supplying motor drive signals, etc. (1) is a perspective view of a printed circuit board, and FIG. (2) is a perspective view for explaining the connection state between a socket mounted on the printed circuit board and a connector plug on the motor side. The symbols in the drawings are the same as in FIG. 6, and
Reference numeral 45 indicates a printed circuit board, 46 indicates a socket, and a white arrow indicates the insertion direction of the connector plug 42.

As shown in FIG. 7(1), a socket 46 is attached to the printed circuit board 45 for supplying motor drive signals and the like.

This socket 46 and the connector plug 42 on the motor 41 side shown in FIG. 6(1) are connected as shown in FIG. 7(2), and necessary motor drive signals are sent to the motor 41. is supplied.

As described above, the process of connecting the conventional motor 41 and the lead wires 43, which are motor drive signal wires, is complicated, and moreover, each lead wire 43 and the pin member 4 of the connector plug 42 are
4 must be connected accurately to the predetermined phase of the motor 41. Therefore, after assembly and connection, it is necessary to inspect for incorrect connections, which is inconvenient in terms of cost. there were.

Furthermore, the motor connection method of the present invention solves these inconveniences in the conventional connection circuit between the motor and the motor drive signal line, and reduces the number of parts used by omitting the connector plug. , by preventing the occurrence of incorrect connection of lead wires and making it possible to eliminate the inspection process.
The aim is to achieve cost reduction.

For this reason, in the motor connection method of the present invention, a socket for a flat cable is used, and the flat cable is used as a lead wire for the stepping motor, and one end of the flat cable is stripped by the required dimension and connected to the terminal. A terminal conductor is formed in advance, and the terminal conductor is directly inserted into the socket for connection.

Next, embodiments of the motor connection method of the present invention will be described in detail with reference to the drawings.

Figures 1 (1) and (2) are schematic structural diagrams showing an embodiment of the motor connection method of the present invention. Figure (1) shows the connection relationship between the flat cable and the socket, and Figure (2) shows the connection relationship between the flat cable and the socket. It is a perspective view showing an example of a flat cable. In the drawing,
41 is the same motor as in FIG. 6, 47 is a flat cable, 47a is its terminal conductor, 47b is a mark, 48 is a socket for the flat cable, and 48a is the mark.

:(7)! In the conventional motor connection method, as shown in FIG. 1, a flat cable socket 48 is used, and a flat cable (ribbon cable) 47 is used as a lead wire of the motor 41.

Then, one end of this flat cable 47 is exposed by a necessary dimension to form a terminal conductor 47a. Note that the motor 41 side of the flat cable 47 is connected to each winding of the motor by soldering, as in the conventional case.

A terminal conductor 47a formed at one end of the flat cable 47 is directly inserted into the flat cable socket 48.

In this case, a mark 47b indicating the direction is attached to the flat cable 47 so that the connection state between the motor 41 and the terminal conductor 47a of the flat cable 47 is in a predetermined motor phase order.

Furthermore, if a mark 48a indicating the positional relationship is attached to the flat cable socket 48, the flat cable 4
By simply aligning the position with the mark 47b of 7, it is possible to reliably prevent the flat cable 47 from being reversely inserted into the flat cable socket 48.

FIG. 2 is a perspective view showing another example of a flat cable suitable for use in the motor connection method of the present invention.

Reference numerals in the drawings are the same as in FIG. 1.

If it is difficult to connect the flat cable 47 and the motor 41 by soldering, as shown in Fig. 2,
All you have to do is separate the cables on the motor connection side and adjust the length to an appropriate length.

In case 5 of the conventional method, if the connector plug installation as shown in Figure 6 (1) is fabricated in the process after motor inspection, since separate cables are used, each cable is color-coded. There was also a possibility of incorrect connection. Therefore, after manufacturing the connector plug installation,
I had to check the connections again.

However, in the motor connection method of the present invention, this figure 1 (
By configuring as in 1), there is no possibility of erroneous connections occurring, so re-checking the connector plug attachment after fabrication is unnecessary, and the fabrication process is simplified.

FIG. 3 is a perspective view of a motor for explaining an example of the installation state of a motor connection pin suitable for use in the motor connection method of the present invention. Reference numerals in the drawings are the same as in FIG. 1. 49 indicates a motor connection pin.

In FIG. 1 and FIG. 2, the case where the flat cable 47 is connected within the motor 41 is shown.

However, it is not necessary that the motor 41 as shown in FIGS.
As shown in FIG. 3, the required number of motor connection pins 49 are provided in advance on the motor 41, and the connection pins 49 are connected to the flat cable 4.
7 may be soldered.

As explained in detail above, the motor connection method of the present invention uses a flat cable socket in a motor drive device equipped with a stepping motor and a printed circuit board equipped with a socket for supplying motor drive signals, etc. , a flat cable is used as a stepping motor lead wire, one end of the flat cable is stripped to the required size to form a terminal conductor, and this terminal conductor is directly inserted into the socket for connection. ing.

Therefore, the motor connection method of the present invention can be used in various electronic devices such as printers, electronic typewriters, facsimile machines, and floppy disks.

In a stepping motor drive device widely used for positioning control, the number of connecting parts such as connector plugs for driving the stepping motor has been significantly reduced, and the assembly process has been simplified to prevent incorrect connection of lead wires. Since this is prevented, reliability is improved.

In addition, the occurrence of errors during assembly due to the reduction in the number of connecting parts is eliminated, so there is no need for an inspection process after 5 assemblies, and many excellent effects such as cost reduction are achieved.

[Brief explanation of the drawing]

1 1 and 2 are mechanical structural diagrams showing one embodiment of the motor connection method of the present invention, and Figure (1) shows the connection relationship between the flat cable and the socket, and Figure 1 (2) shows an example of the flat cable. In is a perspective view showing another example of a flat cable suitable for use in the motor connection method of the present invention, and In is a perspective view of a motor connection pin suitable for use in the motor connection method of the present invention. The mounting diagram is a perspective view of the motor to explain an example of the state, m is a plan view showing the schematic structure of the printing mechanism inside a conventionally used serial printer, and l is the plate shown in Figure 4. jl 6 (1) k (2) is a schematic structural diagram showing an example of a connection circuit between a motor and a motor drive signal line in a conventional printer. (1) is the connection state between the motor and the connector plug, Figure (2) is an enlarged view of the main part of the pin member of the connector plug, and IJL mυ- is the conventional connector plug on the motor side and a socket that supplies motor drive signals, etc. FIG. 1 is a schematic structural diagram showing an example of a method for connecting to a printed circuit board including a printed circuit board, and FIG. 1 is a perspective view of the printed circuit board. Figure (2) shows the socket installed on the printed circuit board,
FIG. 3 is a perspective view for explaining a connection state with a connector plug on the motor side. In the drawing, 41 is a motor, 42 is a connector plug, 43 is a lead wire, 44 is a pin member of the connector plug 42, 45 is a printed circuit board, 46 is a socket, 47 is a flat cable, 47a is its terminal conductor, and 47b is a flat cable. Mark 48 is a flat cable socket, 48a
indicates the mark, and 49 indicates the motor connection pin. god 1 diagram

Claims (1)

[Claims] In a motor drive device including a stepping motor and a printed circuit board having a socket for supplying motor drive signals, etc., a flat cable socket is provided, the flat cable is used as a lead wire of the stepping motor, and the flat cable is connected to the flat cable. A method for connecting a motor, comprising: forming a terminal conductor by exposing one end of the cable by a necessary dimension, and directly inserting the terminal conductor into the socket for connection.