JPH02305592A - Portable computer sewing machine having battery - Google Patents

Abstract

PURPOSE:To increase a working time by using an amount of charge made one time by providing a computing device to compute a remaining amount in a storage battery from a voltage value and a current value detected by respective detecting devices connected to the output voltage detecting device and the output current detecting device of the storage battery. CONSTITUTION:A storage battery 15 is charged by means of a solar battery 11, a voltage value is outputted from an input voltage value detecting device 12 connected to a charge route and a current value from an input current value detecting device 13. When the computed electromotive force of the solar battery is enough high, it is decided that the surroundings of a sewing machine is bright, and a signal is outputted to a switch member 18 from the computing device 22 to stop the feed of a power to an illuminating lamp 19. Since, with regard to a power outputted from the storage battery 15, a voltage value is detected by an output voltage value detecting device 16 and a current value by an output current value detecting device 17, a remaining amount of the storage battery 15 is calculated by a computing device. When the remaining amount is reduced to a value lower than a specified reference value, the feed of a power to the lamp 19 and the feed of a power to an electric motor 21 are stopped by the switch member 18 and a speed control device 20, respectively, and a display device 23 display the information.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a portable computerized sewing machine equipped with a storage battery.

(Prior Art) Sewing machines that use dry cell batteries or storage batteries as a power source for the drive device have been considered for some time, but sewing machines that use dry cell batteries have a short lifespan and are often burdened with the hassle of replacing new dry cell batteries. Sewing machines that use storage batteries have the advantage of being able to be used repeatedly even if they are discharged, if they are recharged.However, the sewing machine is operated by discharging the battery until the amount of charge stored in the storage battery drops below a certain level. Therefore, it had the disadvantage of shortening the life of the storage battery.

(Problems to be Solved by the Invention) The present invention extends the operating time of a portable sewing machine equipped with a storage battery based on a single charge of the storage battery, and reduces power consumption when the amount of charge in the storage battery reaches a certain level. It will be canceled.

(Means for Solving the Problems) The present invention provides a portable computerized sewing machine equipped with a storage battery, in which the brightness is calculated when the storage battery is charged, and if the brightness exceeds a certain level, the illumination lamp is automatically turned off, and the discharge from the storage battery is automatically turned off. The system detects the amount of charge and when the capacity reaches a certain level, displays that the amount of charge in the storage battery has reached its limit and stops driving the sewing machine to prevent over-discharge of the storage battery.

(Function) The device of the present invention comprises a needle bar that is moved up and down by a drive shaft that is rotatably supported within a sewing machine frame, a thread ring catcher that is moved in synchronization with the up and down movement of the needle bar, and a thread feeder. a storage battery that supplies power to an electric motor that rotates the drive shaft, an output power detection device and an output current detection device connected in series to the discharge side of the storage battery, and the output voltage detection device and output By providing an arithmetic device that is connected to the current detection device and calculates the remaining amount in the storage battery based on the voltage value and current value detected by each detection device, the charge in the storage battery can be reduced by discharging the storage battery. The decreasing amount is constantly calculated, and when the amount decreases to a certain level, the operator is notified via the display that the limit has been reached, and a stop signal is sent to the sewing machine's drive unit. This feature is characterized in that it acts so as to stop the electric motor.

(Example) An embodiment of the device of the present invention will be described below with reference to the drawings.

■ is the arm bed machine frame of the sewing machine, and a drive shaft (not shown) is rotatably supported in the upper machine frame of the arm bed machine frame, and the needle bar is rotated in conjunction with the rotation of the drive shaft. 2 is caused to reciprocate in the vertical direction, and the balance 3 is caused to swing.

In addition, there is a lower shaft (not shown) in the lower machine frame of the arm bed machine frame.
is rotatably supported in conjunction with the drive shaft, and a thread loop catching device and a sewing device (both not shown) connected to the lower shaft are provided.

A presser bar 4 is supported adjacent to the needle bar 2 on the jaw of the arm bed machine frame, a presser bar plate 5 is fixed to approximately the center of the presser bar, and a presser foot 6 is attached to the lower end. ing. The presser foot support lever 5 has a presser foot upper lever 7 pivotally attached to the machine frame 1.
The cam portions of are engaged with each other.

A thread spool 8 is supported by an upper thread holding base 9, and the upper thread 10 pulled out from the thread spool 8 is guided to a needle thread attached to the lower end of the needle bar 2 through a thread take-up thread take-up thread take-up thread take-up thread take-up thread take-up thread take-up thread take-up thread take-up thread take-up lever 3.

Reference numeral 11 denotes a solar cell, which is pivotally mounted above the armbed machine frame 1 so that the direction of its plane part can be changed. A storage battery 15 built into the sewing machine frame is charged from the solar battery 11, and a lighting lamp 1 is charged from the storage battery 15.
9 and the driving electric motor 21.

The charging and discharging of the storage battery 15 will be described in detail with reference to FIG. 7. The power supply flows as indicated by thick arrows, and the control signal flows as indicated by thin arrows.

That is, the storage battery 15 includes a solar cell 11, an input terminal value detection device 12, an input current value detection device 13, and a backflow prevention device 1.
4, and the discharge path of the storage battery 15h1 etc. passes through the output voltage value detection device 16 and the output current value detection device 17,
Furthermore, electrical connection is made to an illumination lamp 19 via a switch member 18, and electrical connection is made to a driving electric motor 21 via a speed control device 20.

22 is an arithmetic device consisting of a computer, and the arithmetic device receives the input voltage value from the input voltage value detection device 12.
An input current value is input from the input current value detection device 13, and an output current value is input from the output current value detection device 17, respectively,
Furthermore, the arithmetic unit 22 is connected so that a detection signal indicating the presence or absence of thread is inputted from the upper thread detection device 24, and a detection signal indicating the vertical position of the presser foot upper lever 7 is inputted from the presser foot detection device 25. There is.

Reference numeral 26 denotes a speed setting device such as a foot-operated or manual speed controller, and a control signal from the speed setting device is input to the speed control device 20. 27 is a speed detection device that detects the rotational speed of the electric motor 21;
is fed back to compare the current rotation speed with the set speed.

The arithmetic device 22 is connected to the speed control device 20 and the display device 23 of the switch member 18, respectively, and a control signal is transmitted thereto.

The structure of the display device 23 will be described with reference to FIGS. 1 and 2. The display device consists of an LCD (liquid crystal) and is mounted on the front wall of the sewing machine frame 1, and displays a status explanation word, an instruction word, and a storage battery. The upper thread detecting device 24 is a reflective optical sensor, and its structure will be described with reference to FIGS. 3 and 4. Part 2
8, a light emitting element 30 and a light receiving element 31 are disposed at one end of the detection frame, and a reflection plate 32 is disposed at the other end to prevent threads from being present within the detection frame. For example, since the light from the light emitting element 30 is blocked by the thread, the amount of light received by the light receiving element decreases.

In the above embodiment, the solar battery 11 is used to charge the storage battery 15.
However, it is also possible to charge the battery using a commercial AC power supply charger that is easily available in ordinary households.

The structure of one embodiment of the device of the present invention is as described above, and the operation is as follows.

The storage battery 15 is charged by the solar battery 11.

The input terminal value detection device 12 connected to the charging path to the storage battery 15 outputs a voltage value, and the input current value detection device 13 outputs a current value to the calculation device 22. Since the electric power value is calculated, if the electromotive force value is large enough, it is determined that the area around the sewing machine is bright, and the calculation unit 2
2 outputs a power reduction mode signal to the switch member 18, and the switch member stops supplying power to the illumination lamp 19.

Further, since the voltage value of the electric power output from the storage battery 15 is detected by the output voltage value detection device 16 and the current value is detected by the output current value detection device 17, the remaining amount of the storage battery 15 is calculated by the calculation device. When the remaining amount becomes below a certain standard, the switch member 18 and the speed control device 20
A power reduction mode signal is output to the display device 23, and in response to the signal, the switch member 18 stops supplying power to the lamp 19, and the speed control device 20 stops supplying power to the electric motor 21. The display device 23 is the second
As shown in the figure, the message to explain the situation is “inoperable”.
, the instruction message ``Please charge'' and the ``remaining amount of charge'' in the storage battery are displayed to provide information to the operator.

Furthermore, if the thread breaks in the upper thread detecting device 24 and becomes detached from the upper thread detecting device so that the thread cannot be detected, a signal indicating that the presence of the thread cannot be confirmed is manually inputted to the arithmetic unit 22.
The arithmetic unit issues an instruction to stop the rotation of the electric motor and determines that the operator will thread the needle, so a command signal is issued to the switch member 18 and the illumination lamp I9 is activated.
light up.

Further, the presser foot detection device 25 is activated via the presser foot bar 5 fixed to the presser foot bar 4 by operating the presser foot upper lever 7, and when the lower end presser foot 6 is raised, the arithmetic device 22 is activated. It is determined that the sewing start position of the cloth to be sewn will be adjusted, and a signal is sent to the switch member 18 to turn on the illumination lamp 19. Further, when the presser foot 6 is lowered and the thread is detected by the upper thread detection device 24, the arithmetic unit 22 issues a command to the switch member 18 to turn off the illumination lamp 19.

(Effect of the invention) In the device of the present invention, judgment is made based on the electromotive force generated when charging the storage battery from the solar cell, and if the surroundings are bright, the lighting lamp is turned off to save power, and the output from the storage battery is detected. Calculates the amount remaining in the storage battery, and when the remaining amount is low, instructs the sewing machine to stop, repeatedly uses the storage battery due to over-discharge, and turns on and off the lighting lamp depending on the thread breakage or presser foot condition. Since it can be activated automatically, power consumption can be automatically saved, and it can be used in remote areas or camping areas where commercial power is not available, which is a great practical advantage.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention; FIG. 1 is an external perspective view of a sewing machine incorporating the device of the present invention, FIG. 2 is a front view of a display device of the device of the present invention, and FIG. FIG. 4 is a front view of the needle thread detection device of the device of the present invention, FIG. 5 is a front view of the presser foot detection device of the device of the present invention, and FIG. 6 is a top view of the device of the present invention. 7 is a system block diagram of the device of the present invention, 1 is a sewing machine frame, 2 is a needle bar, 11 is a solar cell, I2 is an input voltage value detection device, and 13 is an input current value. Detection device, I5 is a storage battery, 1
6 is an output voltage value detection device, 17 is an output current value detection device,
18 is a switch member, 19 is a lamp, 21 is an electric motor, 2
2 is a calculation device, and 23 is a display device. Patent applicant: Janome Sewing Machine Industry Co., Ltd. Figure 2 Figure 3

Claims (1)

[Scope of Claims] (I) A needle bar that is moved up and down by a drive shaft that is rotatably supported within the sewing machine frame, a thread ring capture device that is moved in synchronization with the up and down movement of the needle bar, and a storage battery that supplies power to an electric motor that rotates the drive shaft; an output voltage detection device and an output current detection device connected in series to the discharge side of the storage battery; A portable computer sewing machine comprising a storage battery and an arithmetic device connected to an output current detection device and calculating a remaining amount in the storage battery based on the voltage value and current value detected by each of the detection devices. (II) comprising a needle bar that is moved up and down by a drive shaft rotatably supported within the sewing machine frame, and a thread ring catching device and a feeding device that are moved in synchronization with the up and down movement of the needle bar; A storage battery that supplies power to an electric motor that rotates the drive shaft, an output voltage detection device and an output current detection device connected in series to the discharge side of the storage battery, and the output voltage detection device and the output current detection device. a calculation device that calculates the remaining amount in the storage battery based on the voltage value and current value detected by the respective detection devices; and a calculation device that is connected to the calculation device and receives an instruction signal from the calculation device based on the calculation result of the remaining amount in the storage battery. A portable computerized sewing machine comprising a storage battery provided with a display device, a switch member for an illumination lamp, and a speed control device for the electric motor. (III) comprising a needle bar that is moved up and down by a drive shaft rotatably supported within the sewing machine frame, and a thread ring capture device and a feeding device that are moved in synchronization with the up and down movement of the needle bar; A storage battery that supplies power to an electric motor that rotates the drive shaft, an input voltage detection device and an input current detection device connected in series to the charging side of the storage battery, and the input voltage detection device and the input current detection device. A computing device that is connected to the computing device and calculates the brightness to be irradiated to the solar cell on the power supply side based on the voltage value and current value detected by each detection device; A portable computerized sewing machine equipped with a storage battery and a switch member for a lighting lamp.