JPH0147198B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field The present invention relates to a sewing machine equipped with a removable memory cassette, and in particular, to a sewing machine equipped with a memory cassette that can be sewn by the memory cassette. This relates to a sewing machine that can notify the operator.

Prior Art There is a known sewing machine that can sew a pattern that does not belong to the pattern group corresponding to the stitch data stored in advance in the sewing machine based on the stitch data stored in the memory cassette by installing a memory cassette. It is being In such sewing machines, the operator selects a memory cassette that stores stitch data corresponding to a desired pattern and attaches it to the sewing machine. It is desirable to inform the operator of the type of pattern corresponding to the data by means other than looking at the label attached to the memory cassette.

On the other hand, it is conceivable that when a memory cassette is attached to the sewing machine main body, the type of pattern corresponding to the stitch data stored in the memory cassette is displayed to the operator by an audio display or an optical display. However, such a sewing machine has the disadvantage that when the memory cassette is attached to the sewing machine main body while the main current of the sewing machine is not being applied, the audio display, optical display, etc. cannot be displayed.

Purpose of the Invention The present invention has been made against the background of the above-mentioned circumstances, and its purpose is to automatically store the memory cassette regardless of whether the main power of the sewing machine is turned on when the memory cassette is attached to the main body of the sewing machine. To provide a sewing machine capable of immediately displaying what kind of pattern is a pattern corresponding to stitch data stored in a sewing machine.

Structure of the Invention In order to achieve the above object, the sewing machine of the present invention has the following features:
(1) A memory cassette that includes a built-in memory for storing stitch data related to at least one pattern and display data that displays the type of the pattern, and is configured to be removably attached to the sewing machine body, and (2) the memory. a device for detecting attachment of a cassette to a sewing machine body and applying power to an electronic circuit section of the sewing machine body; (3) reading means for reading display data from the memory when the power is turned on; and a display device that informs an operator of the type of film-like material according to displayed display data.

Effects of the Invention By doing this, power is turned on to the electronic circuit section in the sewing machine body at the same time as the memory cassette is attached to the sewing machine body, and the reading means reads data from the memory built in the memory cassette by turning on the power. The display data is read out, and the display device informs the operator of the type of pattern related to the attached memory cassette according to the display data. Therefore, the operator can immediately know the contents of the memory cassette regardless of whether the main power of the sewing machine is turned on.

Embodiment Hereinafter, an embodiment of the present invention will be described in detail based on the drawings.

In FIG.
is erected, and a pair of upper arm portions 16 having heads 14 are supported horizontally and in a cantilevered manner by the pillar portions 12. The lower part of the head 14 is provided with a needle bar 18 that is reciprocated in the vertical direction in synchronization with the rotation of a sewing machine main shaft (not shown), and a presser foot 20 that is operated by the operator to a raised position or a lowered position. Further, a feed dog 22 is provided near the needle drop point on the bed portion 10. The needle bar 18 is adapted to be driven laterally by a needle position actuator 24, which will be described later, and the feed dog 22 is adapted to have its feed amount and feed direction changed by a feed actuator 26, which will be described later. It's summery. Sewing needle and feed dog 2 fixed to the needle bar 18
2 work together to form a desired pattern on the work cloth.

A start/stop push button 28 is provided on the head 14 to start or stop the sewing machine each time the button is pressed.
In addition, a display window 3 provided on the front side of the upper arm portion 16
The shapes and pattern numbers corresponding to the patterns that can be sewn are displayed through 0. The figures and pattern numbers are displayed on a fixed display board, a movable display board, etc., and when the movable display board is moved by an operating lever 32, which will be described later, a fixed display board located behind the movable display board is displayed. A display board appears on the front, and figures and pattern numbers corresponding to the plurality of groups of patterns are selectively displayed for each group.

An operating section 34, which is shown in detail in FIG. 2, is provided on the front surface of the pillar section 12. In the operation section 34, an operation lever 32 is disposed at the top, and below the operation lever 32 is a two-digit number display 35 and a plurality of numbers engraved with numbers "0" to "9". An input key 36 is provided. A pattern to be sewn is selected by inputting a pattern number assigned to a figure corresponding to a desired pattern using the input key 36. To the right of the input key 36 is a switching operation button 38 for switching between the content memory 42 as the first memory and the external memory 44 as the second memory, and a switch button 38 that lights up to indicate when the external memory 44 is selected. represent
LED40 is arranged. Switching operation button 38
The LED 40 is turned on and off each time the button is pressed, and the external memory 44 and internal memory 42 are selectively switched. Further, at the bottom of the operation section 34, a needle position adjustment knob 46, a feed adjustment knob 48, and a sewing machine motor speed adjustment knob 50 are provided.
is installed. The needle position adjustment knob 46 is used to manually adjust the amount of oscillation of the sewing needle, and the manual operation is activated when the LED 54 is turned on by operating the manual switching push button 52. The feed adjustment knob 48 is used to manually adjust the feed amount of the work cloth, and the operation is controlled by the LED 58 by operating the manual switching push button 56.
is activated when is lit. Above adjustment knobs 46, 48, manual switching push buttons 52, 56, LED
54 and 58 are actuator drive devices 60, which will be described later.
It is included in Further, a sewing machine motor speed range knob 50 is provided in a sewing machine motor drive circuit (not shown), and is used to adjust the rotational speed of the sewing machine motor that drives the sewing machine main shaft.

In the sewing machine of this embodiment, as shown in FIG. 3, a memory cassette 62 containing the external memory 44 is removably installed.
That is, the sewing machine frame 64 that constitutes the sewing machine body
A slot 66 is formed in which the memory cassette 62 is inserted, and when the memory cassette 62 is inserted into the slot 66, the external memory 44 in the memory cassette 62 is connected to the control circuit inside the sewing machine via the connector 68. It is becoming connected. Further, a limit switch 70 is fixed to the sewing machine frame 64 and is activated when the memory cassette 62 is installed to the installation position shown by the two-dot chain line in FIG. Note that the limit switch 110 is for detecting attachment of the memory cassette 62.

The sewing machine constructed as described above is equipped with a control circuit shown in FIG. That is, the pattern code signal SMC corresponding to the selected pattern in response to the input of the pattern number using the input key 36 is sent from the encoder 72 to the first start address memory 74, the second start address memory 76, and the decoder driver 78, respectively. Supplied. The decoder driver 78 supplies a drive signal corresponding to the pattern code signal SMC to the number display 35, so that the pattern number corresponding to the pattern code signal SMC is displayed there. A first start address memory 74 and a second start address memory 76 are provided corresponding to the internal memory 42 and external memory 44, respectively.
The pattern code signal is a signal representing the start address for extracting a series of stitch data stored in 4.
In response to SMC, the signals are supplied to input ports PL and PH of multiplexer 80, respectively. In addition, the input ports PL and PH of the multiplexer 80 have
Stitch data from the internal memory 42 and stitch data from the external memory 44 via the connector 68 and channel selector 82 are respectively supplied.

The T-type flip-flop 88 can be alternately inverted between a set state and a reset state by an operation signal SP1 generated in response to the operation of a changeover switch 86 having a changeover operation button 38. When an "H" level signal indicating the set state is output from 88,
The LED 40 is turned on and the signal is sent to the port select terminal PS of the multiplexer 80.
When the input port PH is supplied to the multiplexer 80, its input port PH is selected. That is, in the multiplexer 80, when the internal memory 42 is selected by operating the switching operation button 38, its input port PL is selected, and when the external memory 44 is selected, its input port PH is selected. , and output the respective leading addresses and stitch data supplied thereto to the stitch data reading circuit 84 and the actuator drive device 60, respectively.

The stitch data reading circuit 84 is connected to the first start address memory 74 or the second start address memory 76.
The machine is equipped with an address counter into which the first address from the sewing machine is loaded, and the timing signal TP outputted from the timing signal generator 90 in synchronization with the rotation of the main shaft of the sewing machine is added to the numerical value of the loaded first address and counted. A signal representing the count contents is supplied to the internal memory 42 as an address signal, and is also supplied to the external memory 44 via the multiplexer 92 and the connector 68. That is, the stitch data reading circuit 84 reads out a series of addresses (addresses) starting from the top address supplied from the first tip address memory 74 or the second tip address memory 76, in other words, the stitch data stored in advance. Store the location in the internal memory 42 or external memory 44.
are specified in sequence. Therefore, a series of stitch data for sewing the pattern selected by the operation of the input key 36 is synchronized with the rotation of the sewing machine main shaft from either the internal memory 42 or the external memory 44 selected by the multiplexer 80. and is sequentially supplied to the actuator drive device 60. Each stitch data consists of a pair of needle position signals SN and feed signals SF;
SN and feed signal SF are converted into voltage signals in actuator drive device 60, amplified, and supplied to needle position actuator 24 and feed actuator 26 as drive signals. Therefore, a stitch is formed by the needle position actuator 24 driving the needle bar 18 and the feed actuator 26 driving a feed adjuster operatively connected to the feed dog 22 in synchronization with the rotation of the sewing machine main shaft. be done. By performing the above operations for each set of stitch data, individual stitches are formed and a desired pattern is formed on the work cloth.

In the sewing machine of this embodiment, as described above, a desired pattern other than the pattern previously stored in the sewing machine can be formed according to the stitch data stored not only in the internal memory 42 but also in the external memory 44. In addition, when the memory cassette 62 contained in the external memory 44 is inserted into the slot 66 provided in the sewing machine frame 64, the memory cassette 62 is
The contents are now displayed to the worker.

That is, the mounting signal ST output from the limit switch 70 is output from the J-K flip-flop 9.
8. The J-K flip-flop 98 is placed in the set state in response to the attachment signal ST, while
An "H" level signal representing the set state is supplied to the audio data readout circuit 100, the multiplexer 92, and the channel selector 82, and the reset state is set in accordance with the reset signal from the audio data readout circuit 100. be.

The audio data reading circuit 100 includes an address counter, counts the pulse signal SP supplied from the oscillator 102, and supplies an address signal corresponding to the counted contents to the external memory 44 via the multiplexer 92 and the connector 68. The address counter in the audio data reading circuit 100 is, for example,
The counter is a counter that expires at a count value of 99, and outputs the reset signal for resetting the JK flip-flop 98 when the count expires, and the address counter receives a signal from the JK flip-flop 98 representing its set state. Therefore, the count is reset to zero, and thereafter a series of address signals from address ``00'' to address ``99'' are output. Note that in the multiplexer 92 and channel selector 82, J
- K flip-flops 98 while signals representing the set state of their input ports are generated.
PH and output port PH are respectively selected, and during this time, the address signal output from the audio data reading circuit 100 is supplied to the external memory 44, while the series of audio data output from the external memory 44 is sent to the channel selector 82. The signal is supplied to the speech synthesis circuit 104 via the . Therefore, in this embodiment, the limit switch 70,
JK flip-flop 98, audio data reading circuit 100, oscillator 102, etc. constitute a reading means for reading audio data from external memory 44 in response to switching operation of changeover switch 86 when mounting signal ST is generated.

In the external memory 44, for example, as shown in the memory map in FIG. Audio data as display data is stored, and a series of stitch data is stored for every 20 addresses after address "100". For this reason,
The memory cassette 62 is inserted and the external memory 44 is inserted.
When the switching operation button 38 is pressed to switch to , the audio data stored in the external memory 44 is sequentially supplied to the audio synthesis circuit 104 via the channel selector 82 according to the address signal from the audio data reading circuit 100. and speech synthesis circuit 1
Since the audio signal VOS from 04 is supplied to the speaker 108 via the amplifier 106, the type of pattern stored in the memory cassette 62 is transmitted to the speaker 108.
Audio is displayed starting from 8. Therefore, the operator can easily know the type of pattern stored in the memory cassette 62 without looking at its label. When the address specified by the audio data reading circuit 100 reaches address "99," the address counter in the audio data reading circuit 100 expires, the JK flip-flop 98 is reset, and the multiplexer 92 and channel selector are reset. 82 input ports PL and output ports PL
At the same time as is selected, the output of audio data is stopped. That is, in this embodiment, the voice synthesis circuit 104, amplifier 106, speaker 108, etc. constitute a display device.

Next, the start addresses for sewing the pattern selected by the operation of the input key 36, such as addresses "100", "120", "140", etc., are supplied from the second start address memory 76 to the stitch data reading circuit 84. , when the addresses following the first address are sequentially specified from the stitch data reading circuit 84, the external memory 4
A series of stitch data stored in advance in the sewing machine 4 is supplied to the actuator drive device 60 via the connector 68 and the channel selector 82, and the selected desired pattern is sewn.

The sewing machine configured as described above is equipped with a power supply circuit shown in FIG. That is, a main power switch 116 is inserted in the line that supplies power from the AC power supply 112 to the power supply device 114, and in parallel with the main power switch 116, a limit switch 110 and a contact 118 interlocked with the main power switch 116 are connected. A series circuit is provided. The power supply device 114 includes a power source for driving the sewing machine motor, an actuator power source for driving the needle position actuator 24 and the feed actuator 26, and a control circuit power source, each of which has a voltage of "+V _M ". and “−V _A and +
It outputs voltages of " _VA " volts and "-V _C and +V _C " volts. A contact 120 interlocked with the main power switch 116 and a contact 122 interlocked with the limit switch 110 are inserted in parallel in the line that outputs the power supply voltage for the sewing machine motor of the power supply apparatus 114. A contact 124 interlocked with the main power switch 116 and a contact 126 interlocked with the limit switch 110 are inserted in parallel in the line that outputs the power supply voltage for the actuator. Contact points 118, 120, 124
is a contact that is operated in conjunction with the main power switch 116 by being mechanically connected to the main power switch 116 or electrically connected via a relay or the like, and the contacts 120, 124
The contact 118 opens and closes in the same way as the main power switch 116, but the contact 118 opens and closes in the opposite way to the main power switch 116. In addition, contacts 122 and 1
26 is mechanically connected to the limit switch 110 or electrically connected to the limit switch 110 via a relay or the like;
It is configured to open and close in the opposite manner to 10.

According to this embodiment, when memory cassette 62 is inserted into slot 66, limit switch 110 is first actuated to close its contacts. Since the contact 118 is closed when the main power switch 110 is not operated yet,
Power from an AC power source 118 is supplied to the power supply device 114 through a limit switch 116 and a contact 118. Therefore, when the memory cassette 62 is pushed further into the slot 66 and its attachment is detected by the limit switch 70, the control circuit power supply voltages of "-V _C and +V _C " volts are already prepared. Based on the audio data stored in advance in the external memory 44 in the memory cassette 62, the type of pattern associated with the memory cassette 62 is displayed audibly as described above. Note that at this time, the contacts 122 and 126
is opened in conjunction with the limit switch 110, so the power supply voltage for the sewing machine motor and the power supply voltage for the actuator are not output. Note that when the main power switch 116 is operated, its contacts are closed, so power from the AC power supply 112 is supplied to the power supply device 114 regardless of whether or not the limit switch 110 is operated, and the contacts 12
0 and 124 are closed, the sewing machine motor power supply voltage, actuator power supply voltage, and control circuit power supply voltage are all output.

As described above, according to this embodiment, even if the memory cassette 62 is inserted while the main power switch 116 is not yet operated, the power supply voltage for the control circuit is not outputted from the power supply device 114 based on the operation of the limit switch 110. Therefore, the type of pattern associated with the memory cassette 62 is displayed audibly. Further, according to the present embodiment, the limit switch 110 is configured to be activated before the limit switch 70 is activated, so that the power supply can be stabilized such as the charging time of the smoothing capacitor provided in the power supply device 114. There is an advantage that the necessary time is obtained sufficiently and that stable audio display operation is performed when the memory cassette 62 is connected to the connector 68.

Although the embodiment of the present invention has been described above based on the drawings, the present invention can also be applied to other aspects.

For example, various types of power supply devices 114 may be used. For example, a power transformer is equipped with a plurality of secondary side taps corresponding to the types of output voltage, and the secondary voltage generated at the secondary side taps is rectified to produce the power supply voltage for the sewing machine motor, the power supply voltage for the actuator, and the control voltage. It may consist of a rectifier circuit that forms the power supply voltage for each circuit, or it may further have a structure in which the output voltage of the rectifier circuit is regulated to a constant level using a transistor, etc., or a power supply device may be configured to obtain a target output voltage. Therefore, it may be constructed by a switching regulator of the type that adjusts the output voltage by stepping the input voltage.

Further, the connections of the main power switch 116, limit switch 110, contacts, etc. provided on the primary side or secondary side of the power supply device 114 can be changed in various ways, and the contacts 122 and 126 do not necessarily have to be provided. It is.

Further, in the above embodiment, the external memory 44
The audio data stored in the external memory 44 not only indicates the type of pattern corresponding to the stitch data stored in the external memory 44, but also the range of corresponding pattern numbers corresponding to the pattern and information on how to sew the pattern. The type of presser foot to be used may also be displayed audibly. The types of patterns include, for example, "Katakana",
"Alphabetic characters" and "animal series names" are used.

In the embodiment described above, a limit switch 110 is provided to detect the memory cassette 62, but if the memory cassette 62 is connected to the connector 68
A circuit may be provided in the memory cassette 62 to short-circuit the pair of terminals of the connector 68 when the connector 68 is connected to the memory cassette 62, so that the control circuit is powered on by short-circuiting the pair of terminals.

Further, in the above embodiment, the external memory 44
Audio data is stored in the memory cassette 62, and the contents of the memory cassette 62 are displayed by audio display based on the audio data. A message for displaying at least the type of pattern corresponding to the contents of the cassette 62 may be outputted from the character display device.

Further, part or all of the circuit surrounded by the dashed line in FIG. 4 of the above-described embodiment may be constructed by a so-called microcomputer.

The above-mentioned embodiment is merely one embodiment of the present invention, and various modifications may be made to the present invention without departing from the spirit thereof.

[Brief explanation of drawings]

FIG. 1 is a front view of a sewing machine showing an embodiment of the present invention. FIG. 2 is an enlarged view of the operating section of the embodiment shown in FIG. FIG. 3 is a sectional view of a main part showing the mounting structure of the memory cassette in the embodiment of FIG. 1. FIG. 4 is a block diagram showing a control circuit provided in the embodiment of FIG. 1. FIG. 5 is a memory map showing the contents of the external memory of the embodiment shown in FIG. FIG. 6 is a circuit diagram showing the main parts of the power supply circuit provided in the embodiment of FIG. 1. 44: External memory (memory), 62: Memory cassette, 110: Limit switch (device for turning on power), {70: Limit switch, 98: J
-K flip-flop, 100: audio data reading circuit, 102: oscillator} (reading means), {104:
Speech synthesis circuit, 106: amplifier, 108: speaker} (display device).

Claims (1)

[Scope of Claims] 1. A memory cassette that includes a built-in memory for storing stitch data regarding at least one pattern and display data that displays the type of the pattern, and is configured to be removably attached to the sewing machine body; a device for detecting attachment of a memory cassette to a sewing machine body and applying power to an electronic circuit section of the sewing machine body; a reading means for reading display data from the memory when the power is turned on; A sewing machine comprising: a display device that informs a worker of the type of pattern to be used; and a removable memory cassette. 2. A sewing machine equipped with a removable memory cassette according to claim 1, wherein the display data is audio data representing the type of pattern, and the display device includes a speaker disposed within the sewing machine main body. 3. A sewing machine equipped with a removable memory cassette according to claim 1, wherein the display device includes an optical display for visually displaying the type of pattern.