JPH1170282A - Motor-driven sewing machine with embroidery device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the electric power consumption by a motor-driven sewing machine having an embroidery device by making the sewing machine easier to handle. SOLUTION: In a motor-driven sewing machine having an embroidery device, the embroidery device 30 and a motor-driven sewing machine main body 1 are provided with respective connectors 20, 38 for electrically connecting them together when the embroidery device 30 is installed, the connectors 20, 38 having power lines 61a-62b through which at least power from a power circuit 2 in the motor-driven sewing machine main body 1 is supplied to the embroidery device 30. Motors 31, 32 for driving an embroidery frame are supplied with power from the power lines 61a-62b, and the motor-driven sewing machine main body 1 has a power supply reduction means which, during embroidery operation in which the embroidery device 30 operates, reduces the amount of power supplied to at least one or more of driving units other than needle- driving motors in the motor-driven sewing machine main body 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric sewing machine with an embroidery device, which has an embroidery frame provided with an embroidery frame and is detachable from an electric sewing machine body.

[0002]

2. Description of the Related Art A conventional embroidered electric sewing machine is disclosed, for example, in Japanese Utility Model Publication No. 62-21268. This is a normal sewing operation (a sewing operation that does not use an embroidery frame, such as linear sewing, zigzag sewing, and buttonhole sewing).
An embroidery device having an embroidery frame and an embroidery frame driving motor for moving the embroidery frame is detachably provided as an attachment to an electric sewing machine main body capable of performing the operation. When performing normal sewing, the embroidery device is removed, only the electric sewing machine body is used, the cloth is placed on the sewing machine bed, and the sewing needle is moved up and down while feeding the cloth by driving the feed dog. In this way, linear sewing and zigzag sewing are performed. When performing embroidery sewing, the embroidery device is mounted on the electric sewing machine main body, the embroidery frame is arranged below the sewing needle of the electric sewing machine main body, and the sewing needle is moved up and down while moving the embroidery frame in orthogonal coordinates. Then, the embroidery pattern is sewn on the cloth mounted on the embroidery frame.

[0003] Similarly, an embroidery device detachably mounted on an electric sewing machine main body is disclosed in Japanese Patent Application Laid-Open No. 55-52790. The reason why the embroidery device can be attached to and detached from the electric sewing machine main body is that, as shown in JP-A-55-6528, when the embroidery device is installed in a sewing machine table, the entire sewing machine becomes large. Therefore, it is unsuitable as a household sewing machine.
As shown in the official gazette, if a sewing machine exclusively for embroidery sewing is used, for home use, normal sewing is often performed.
It is necessary to own two sewing machines in addition to a sewing machine that can sew normally, which is not suitable for ordinary households. In this regard, if the embroidery device is made detachable, the electric sewing machine main body can be reduced in size and embroidery sewing can be performed as needed, which is extremely useful as a household sewing machine.

[0004]

However, in the above-mentioned conventional example, the embroidery device fixes the embroidery pattern data, the driving timing signal of the sewing needle, and the like to the control device in the electric sewing machine main body or the electric sewing machine main body. Although a connector for inputting from a dedicated control box is provided, the electric power of the motor for driving the embroidery frame is supplied separately from the electric sewing machine main body. That is, a dedicated power supply circuit is provided in the embroidery device, or a dedicated power supply circuit is provided in the dedicated control box. For this reason,
When performing embroidery sewing, it is necessary to insert two power cords, a power cord on the electric sewing machine main body side and a power cord on the embroidery apparatus side, into an outlet, which is inconvenient as a household sewing machine.

Further, the power supply circuit on the embroidery device side has a relatively large capacity motor for driving the embroidery frame, so that the power supply circuit becomes large, and the embroidery device and a dedicated control box become large. This is contrary to the demand for compact sewing machines. Moreover, since the power transformer and the like are relatively heavy, the weight of the entire sewing machine also increases. Furthermore, when embroidery sewing is performed, a drive device that is not required for embroidery sewing, such as a drive device for normal sewing on the electric sewing machine main body side, does not need to be driven. Become.

[0006]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides an electric embroidery apparatus having an embroidery frame and a motor for driving the embroidery frame, which is detachable from an electric sewing machine body. In the sewing machine, the embroidery device and the electric sewing machine main body are provided with a connector for electrically connecting the two when the embroidery device is worn.
The connector has a power supply line for supplying at least power from a power supply circuit in the electric sewing machine main body to the embroidery device, and the motor for driving the embroidery frame is configured to receive power supply from the power supply line. In addition, the electric sewing machine main body includes a power supply amount reducing unit that reduces an electric power supply amount to at least one or more driving devices other than the needle driving motor in the electric sewing machine main body during the embroidery sewing operation in which the embroidery device operates. It is characterized by having.

According to the present invention, the embroidery apparatus detachably attached to the electric sewing machine main body receives power supply from a power supply circuit in the electric sewing machine main body via a connector. The embroidery device can be made compact and lightweight. Also, since only one power cord is required, there is no need to insert two power cords into the outlet as in the conventional example, making it easy to handle for household sewing machines that need to plug and unplug the power cord each time they are used. Is significantly improved. Furthermore, the present invention is configured to reduce the amount of power supplied to at least one or more of the driving devices other than the needle driving motor in the electric sewing machine main body during the embroidery sewing operation, so that the power consumption during the embroidery sewing operation is reduced. And the power supply circuit can be reduced in size and weight.

[0008]

FIG. 1 is a perspective view of an electric sewing machine with an embroidery device according to one embodiment of the present invention. The electric sewing machine main body 1 is an electric sewing machine capable of normal sewing, and an embroidery device 30 is detachably attached to the back of the sewing machine bed 1a using an attachment. On the front panel of the electric sewing machine main body 1, there are provided an operation panel 12 on which selection switches for a zigzag sewing pattern and an embroidery pattern are arranged, and a pattern display 13 for graphically displaying the selected pattern. Further, in the electric sewing machine main body 1, a motor for driving the sewing needle, driving the feed dog and swinging the sewing needle, a control circuit using a computer, a power supply circuit, and the like are provided.

When the embroidery device 30 is mounted on the electric sewing machine main body 1, the embroidery frame 4 positioned on the sewing machine bed 1a is provided.
0 and an X pulse motor 31 and a Y pulse motor 32 for moving the embroidery frame 40 in the XY orthogonal coordinates. The X pulse motor 31 moves the embroidery frame 40 in the X axis direction, and the Y pulse motor 32 moves the embroidery frame 40 in the Y axis direction. A connector 20 is provided on a side of the electric sewing machine main body 1 facing the embroidery device 30, while the embroidery device 30 has
A connector 38 that can be connected to the connector 20 of the electric sewing machine main body 1 is provided.

FIG. 2 is a block diagram showing an electric configuration of the electric sewing machine main body 1 and the embroidery device 30 of the present embodiment. The electric sewing machine main body 1 of the present embodiment is a computer sewing machine that performs operation control using the CPU 3. Z pulse motor 1
Reference numeral 0 denotes a motor for swinging the sewing needle 1b for performing zigzag stitching, and is driven by supplying a pulse current from the drive circuit 8. The rotational force of the Z pulse motor 10 drives a sewing needle swinging mechanism (not shown) via a predetermined link.

The F pulse motor 11 has a feed dog (not shown).
The driving motor is supplied with a pulse current from the driving circuit 9 and driven. The rotational force of the F-pulse motor 11 drives a feed dog driving mechanism (not shown) via a predetermined link. A control signal is supplied from the CPU 3 to the drive circuits 8 and 9 to control the pulse current output. The main motor 7 is an AC or DC motor for moving the sewing needle 1b up and down. , Start / stop and rotation speed adjustment.

In addition to the above, the CPU 3 includes a pattern selection switch 12b arranged on the operation panel 12, the pattern display 13, a timing sensor 4 for detecting the timing of the vertical movement of the sewing needle 1b, a RAM 14, , ROM15
Etc. are connected. In the electric sewing machine body 1,
A power supply circuit 2 is built in. The power supply circuit 2 supplies operating power to the CPU 3, the motors 7, 10, 11 and the like, and also supplies power to the embroidery device 30 via power supply lines 61a, 61b. Do. The power supply circuit 2 is connected to a power supply cord 2b having a plug 2a that can be connected to a household power outlet. The embroidery device 30 has the X
Pulse motor 31, Y pulse motor 32, embroidery frame 4
0 and its drive mechanism (not shown).

Then, the electric sewing machine main body 1 and the embroidery device 30
Are provided with power supply lines 61a and 61b for supplying a drive current from the power supply circuit 2 to the X pulse motor 31 and the Y pulse motor 32, and a drive circuit for the X pulse motor 31 and the Y pulse motor 32. 33,3
When the control signal lines 63a, 63b, 65a, 65b for supplying control signals output from the CPU 3 and the embroidery device 30 are connected to the
Connection detection lines 64a and 64b for switching the connection detection port Ps of U3 from high level to low level are provided.

Next, the operation of this embodiment will be described. When performing normal sewing, the embroidery device 30 is detached from the electric sewing machine main body 1 by removing the connectors 20 and 38. In this state, the connection detection port Ps of the CPU 3 is at the high level. In this case, the CPU 3 enters the normal sewing control mode. That is, the main motor 7 is driven in accordance with the operation of the start / stop switch 5, and the sewing needle 1 is driven.
b, and the Z pulse motor 10 and the F pulse motor 11 are driven in synchronization with the vertical movement of the sewing needle 1b based on the output of the timing sensor 4 to swing the sewing needle 1b and feed the cloth. (In the case of straight stitching, only the F pulse motor 11 is driven to perform only the cloth feed).

Next, when performing embroidery sewing, the embroidery device 30 is mounted on the electric sewing machine body 1 and the connectors 20 and 3 are connected.
8 are joined. As a result, the connection detection port Ps of the CPU 3 is switched to the low level, and the control mode is switched to the embroidery sewing control mode. That is, in the case of embroidery sewing, since the embroidery pattern is sewn by the movement of the embroidery frame 40, the swinging of the sewing needle 1b and the cloth feed are not required, so that the Z pulse motor 10 and the F pulse motor 11 are stopped at predetermined times. Control is performed to set a position and hold the position. The drive current is supplied to the main motor 7 as in the case of the normal sewing.

The CPU 3 operates a pattern selection switch 12.
The embroidery pattern selected in b (the pattern pattern is stored in the ROM 14 in advance) is displayed on the pattern display 13, and the rotation amount and the rotation of the X pulse motor 31 and the Y pulse motor 32 according to the selected embroidery pattern pattern. By controlling the direction, the embroidery pattern is sewn on the cloth mounted on the embroidery frame 40. At this time, the embroidery frame 4 is synchronized with the vertical movement timing of the sewing needle 1b based on the output of the timing sensor 4.
The movement timing of 0 is controlled.

The control of the rotation amount and the rotation direction of the X pulse motor 31 and the Y pulse motor 32 is performed by driving circuits 33 and 3.
4 is supplied with a control signal from the CPU 3 to the power supply line 61.
This is performed by forming a pulse current of the number of pulses corresponding to the control signal using the power supplied through the a and 61b and supplying the pulse current to the X pulse motor 31 and the Y pulse motor 32. The direction of rotation is switched by changing the polarity of the pulse current. By the way, during the embroidery sewing operation, as described above, the control for holding the Z pulse motor 10 and the F pulse motor 11 of the electric sewing machine main body 1 at predetermined stop positions is performed. This is for the following reason.

That is, if the Z pulse motor 10 and the F pulse motor 11 are excited even during the embroidery sewing operation, the power for this excitation is wasted. Also,
In this embodiment, since there is only one power supply circuit 2, the Z
If the excitation of the pulse motor 10 and the F pulse motor 11 is also performed during the embroidery sewing operation, both the power capacity for this and the power capacity for driving the embroidery device 30 are required, and the capacity of the power supply circuit 2 is increased. Must be performed, and the size and weight of the device are increased. For this reason, in the present embodiment, during the embroidery sewing operation, the power supplied to the Z pulse motor 10 and the X pulse motor 11 is reduced so that only the minimum necessary power is supplied. As a result, power consumption during the embroidery sewing operation can be minimized, the capacity of the power supply circuit 2 can be prevented from increasing, and the power supply circuit 2 can be reduced in size and weight.

The Z pulse motor 10 and the F pulse motor 11 used in this embodiment are pulse motors using a PM (permanent magnet) type or HB (hybrid) type magnet. A complete pulse motor, when the current is completely cut off, no longer generates torque, and is easily rotated by an external force. Therefore, if the energization of the Z pulse motor 10 and the F pulse motor 11 is stopped during the embroidery sewing operation, when an external force is applied to the feed dog or an external force is applied to the sewing needle 1b in the swinging direction, the Z pulse is not applied. The motor 10 and the F-pulse motor may rotate, causing a position shift of the feed dog driving mechanism and the sewing needle swinging mechanism.

Therefore, in this embodiment, during the embroidery sewing operation,
Avoid completely stopping the energization of the Z pulse motor 10 and the F pulse motor 11, and supply the minimum power necessary for the motors 10 and 11 not to rotate even when an external force is applied. I have to. Further, the torque characteristic of the pulse motor is such that the generated torque when the rotation is stopped is the largest, so that the minimum necessary electric power is excited to such an extent that the Z pulse motor 10 and the F pulse motor 11 do not rotate. Is set to the required power.

Incidentally, the feed dog driving mechanism as disclosed in Japanese Patent Application Laid-Open No. 62-139694 is extremely simplified, and many links between the F pulse motor and the feed dog are eliminated, so that the F pulse Electric sewing machine configured to directly drive the feed dog by a motor (called direct feed dog drive type)
In the above, even if a small amount of external force is applied to the feed dog and the F-pulse motor rotates, there is no problem in the subsequent sewing operation. Therefore, in the case of such an electric sewing machine, the F-pulse motor is operated during the embroidery sewing operation. It is good also as composition which stops energization to 10 completely.

In the above embodiment, the present invention
Although the example in which the computer sewing machine that performs the operation control using the PU is the electric sewing machine main body has been described, the present invention is not limited to this, and it does not depend on the computer control.
The present invention can be similarly applied to an electric sewing machine simply driven by motor power. However, in this case, a dedicated control circuit (not limited to the CPU) is provided in the embroidery device 30.
It is necessary to adopt a configuration in which a device having

[0023]

As described in detail above, the present invention provides
The embroidery device that is detachable from the electric sewing machine body receives power from the power supply circuit in the electric sewing machine body via the connector, eliminating the need to provide a power supply circuit in the embroidery device. The apparatus can be made compact and lightweight, and cost can be reduced by reducing the number of parts. In addition, since only one power cord is required, there is no need to insert two power cords into an outlet as in the related art, and the handling efficiency of a home sewing machine that disconnects and reconnects the power cord each time is greatly improved. . further,
The present invention reduces power consumption during embroidery sewing operation by reducing the amount of power supply to at least one or more driving devices other than the needle driving motor in the electric sewing machine main body during embroidery sewing operation. In addition, the power supply circuit can be reduced in size and weight.

[Brief description of the drawings]

FIG. 1 is an external perspective view showing a configuration of an embodiment of the present invention.

FIG. 2 is a block diagram showing an electrical configuration in the embodiment.

[Description of Signs] 1 Electric sewing machine main body 2 Power supply circuit 3 CPU 20, 38 Connector 30 Embroidery device 33 X pulse motor 34 Y pulse motor 40 Embroidery frame 61a, 61b, 62a, 62b Power supply line

[Procedure amendment]

[Submission date] August 10, 1998

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] Claims

[Correction method] Change

[Correction contents]

[Claims]

[Procedure amendment 3]

[Document name to be amended] Statement

[Correction target item name] 0005

[Correction method] Change

[Correction contents]

Further, the power supply circuit on the embroidery device side has a relatively large capacity motor for driving the embroidery frame, so that the power supply circuit becomes large, and the embroidery device and a dedicated control box become large. This is contrary to the demand for compact sewing machines. Moreover, since the power transformer and the like are relatively heavy, the weight of the entire sewing machine also increases. Therefore, the purpose of the present invention is to
Eliminating the problems of the example, the power supply of the embroidery machine
Electric sewing machine with embroidery device suitable for feeding from the side
Is to provide

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0006

[Correction method] Change

[Correction contents]

[0006]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides an electric embroidery apparatus having an embroidery frame and a motor for driving the embroidery frame, which is detachable from an electric sewing machine body. In the sewing machine, a drive circuit of the motor
The embroidery device is provided in the embroidery device, and the embroidery device is attached to the electric sewing machine main body.
The wearing time of the embroidering device and a connector for electrically connecting is provided the electric sewing machine body, the connector is a power line for supplying power from the power supply circuit of at least the electric sewing machine body to the embroidery unit Have, said
The control signal output from the electric sewing machine
Supplies the control signal supplying means provided in, and the motor of the embroidery frame driving, by being constituted from the power line in accordance with said control signal so as to receive power
There is .

[Procedure amendment 5]

[Document name to be amended] Statement

[Correction target item name] 0007

[Correction method] Change

[Correction contents]

According to the present invention, the embroidery apparatus detachably attached to the electric sewing machine main body receives power supply from a power supply circuit in the electric sewing machine main body via a connector. Ri required such kuna <br/> comprising, it is possible thereby the embroidery apparatus compact and lightweight. Further, since the power cord so that requires only a single, conventional example as two power code is required plugged into the electrical outlet no longer, for household sewing machines performing every use connect or disconnect the power cord, handling The ease is greatly improved. Furthermore, an embroidery frame drive motor is installed in the embroidery device.
Equipped with a drive circuit, which is controlled from the electric sewing machine
Signal and use the power supplied through the power line
To form a motor drive current according to the control signal and
Data. At this time, the power line of the connector
Is not a source of electromagnetic noise, but a source of electromagnetic noise.
Motor drive current according to the control signal
Between the flowing drive circuit and the embroidery frame drive motor
Since the wiring is inside the embroidery device, the electric sewing machine with the embroidery device
Signal line (for example, a connector connection detection line)
The electromagnetic noise is substantially negligible.
You.

[Procedure amendment 6]

[Document name to be amended] Statement

[Correction target item name] 0023

[Correction method] Change

[Correction contents]

[0023]

As described in detail above, the present invention provides
Since there is no need to provide a power supply circuit in the embroidery device,
The embroidery device can be made compact and lightweight.
Cost reduction by reducing the number of parts.
it can. In addition, since only one power cord is required, it is not necessary to insert two power cords into an outlet unlike the related art, and the handling efficiency of a home sewing machine in which the power cord is connected and disconnected each time use is greatly improved. Furthermore, embroidery
An embroidery frame drive motor drive circuit is provided in the device
Supply control signals to the circuit from the electric sewing machine
In accordance with the control signal using the power supplied through the
Motor drive current is formed and supplied to the motor.
At this time, the power line of the connector is an electromagnetic noise source.
And there is a possibility that it may be a source of electromagnetic noise.
The drive circuit through which the motor drive current flows according to the control signal;
Wiring between the embroidery frame drive motor and the embroidery frame
Therefore, the signal line of the electric sewing machine with embroidery device (for example,
The connection detection line of the
With this, the operation of the electric sewing machine by the signal of the signal line is controlled.
Malfunction can be prevented. For this reason,
Electromagnetic noise caused by the motor drive current according to the control signal
Malfunction of the electric motor with embroidery device
You.

[Procedure amendment 7]

[Document name to be amended] Statement

[Correction target item name] Explanation of sign

[Correction method] Change

[Correction contents]

[Description of Signs] 1 Electric sewing machine main body 2 Power supply circuit 3 CPU 20, 38 Connector 30 Embroidery device 3 1 X pulse motor 3 2 Y pulse motor 33, 34 Drive circuit 40 Embroidery frames 61a, 61b, 62a, 62b Power supply lines 63a, 63b, 65a, 65b control signal line

Claims (3)

[Claims] 1. An electric sewing machine with an embroidery device comprising an embroidery frame and a motor for driving the embroidery frame, the embroidery device being detachable from the electric sewing machine main body. A connector is provided for electrically connecting the two at the time of wearing, and the connector has a power supply line for supplying at least power from a power supply circuit in the electric sewing machine main body to the embroidery device; The frame driving motor is configured to receive power supply from the power supply line, and the electric sewing machine main body is configured to operate other than the needle driving motor in the electric sewing machine main body during the embroidery sewing operation in which the embroidery device operates. An electric sewing machine with an embroidery device, comprising: a power supply reducing unit configured to reduce a power supply to at least one of the driving devices. 2. A driving device other than a needle driving motor in the electric sewing machine main body is at least one of a cloth feed motor and a zigzag sewing needle swing motor. Sewing machine with embroidery device. 3. The electric sewing machine with an embroidery device according to claim 1, wherein the driving device other than the needle driving motor in the electric sewing machine main body is a pulse motor using a magnet.