JPS6315866B2 - - Google Patents

Description

TECHNICAL FIELD The present invention relates to an electronic sewing machine, and more particularly to an electronic sewing machine in which position data for each stitch of a desired pattern can be freely programmed prior to sewing.

Prior Art Conventionally, adjustment data is generated in response to the operation of a manual operating body placed on the front surface of a sewing machine, and position data corresponding to the formation position of each stitch in a pattern to be sewn is adjusted in accordance with the adjustment data. An electronic sewing machine is proposed, which includes an adjusting device for adjusting the sewing machine, a display placed on the front surface of the sewing machine for displaying the adjusting data, and an actuating device for actuating the stitch forming mechanism according to the adjusted position data. ing. In this type of electronic sewing machine, the position data is normally stored in advance in correspondence with a plurality of patterns, and the position data corresponding to the pattern to be sewn is selected from among the position data, and the position data is then manually operated. By numerically setting and providing adjustment data for adjusting the needle swing amount, workpiece cloth feed amount, etc., it is possible to automatically sew a certain degree of variety of patterns.

By the way, in recent years, due to the diversification of user preferences,
There is an increasing desire to sew even more types of patterns than before, and there is a tendency for the types of position data to be stored in advance to be gradually increased even in the above-mentioned conventional electronic sewing machines. However, with conventional electronic sewing machines as described above, the number of patterns that can be sewn is limited due to limitations such as the mounting capacity of electronic components such as circuit boards and display devices, and the storage capacity of memory. The reality was that it was not possible to adequately meet all of the demands of the government.

On the other hand, in recent years, as described in JP-A-53-15960 and JP-A-53-19251, a desired stitch pattern can be created by operating an operating body provided for programming. An electronic sewing machine that can be programmed by doing this is provided. However, in such conventional electronic sewing machines, it is necessary to newly install an input operation body for inputting the position data of the desired creative pattern and a display for displaying the position data, resulting in an increase in the number of parts and The disadvantages were that the implementation design was considerably difficult and the sewing machine was expensive.

Purpose The present invention was made against the background of the above-mentioned circumstances, and its purpose is to automatically sew a pattern that is arbitrarily created and set by the user prior to sewing. To provide a programmable electronic sewing machine at low cost.

Solution In order to achieve the above object, an electronic sewing machine according to the present invention has the above-described configuration, and provides position data corresponding to the formation position of each stitch in a desired pattern to the operation of the manual operating body. a programming circuit having a generator that generates a signal in response, a memory that sequentially stores position data generated from the generator, and a sewing state in which a pattern can be formed by operating the actuator, and operating the programming circuit. a state switching circuit for switching the operating state of the sewing machine between a programming state; and a state switching circuit for selectively supplying the position data generated from a generator of the programming circuit and the adjustment data to the display. and a data supply circuit responsive to the operation of the circuit.

Operation and Effects of the Invention According to the electronic sewing machine configured as described above, the stitch forming mechanism operated by the actuating device during the sewing state uses position data corresponding to each stitch newly stored in the memory during the programming state. Since the movement is controlled by the processing cloth, a pattern corresponding to the contents stored in the memory is formed on the work cloth. That is, in the programming state, the user operates the manual operating body to store the user's desired position data in the memory.
It became possible to automatically sew any pattern desired by the user. Furthermore, since the position data can be written into the memory while checking the data contents using the display, there is no risk of erroneous settings, and the position data of the desired pattern can be reliably programmed.

Therefore, the manual operating body and display used during the programming state can be changed by simply switching the manual operating body and display for adjustment data, which were used only during the sewing state, using a state switching circuit. Since they are designed to be used in common, the structure is simpler and the number of parts used is smaller than in the case where the operating body and the display are provided separately, which is extremely advantageous economically. Furthermore, for the same reason as mentioned above, there is an advantage that the mounting design for mounting the manual operation body and the display on the sewing machine is almost the same as that of a conventional electronic sewing machine.

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

In FIG. 1, reference numeral 2 denotes a bed portion of the sewing machine, and a horizontal arm portion 6 is supported in a cantilevered manner by a pillar portion 4 erected on the bed portion 2.
A head 8 is formed at the tip of the arm portion 6.
A needle 12 is provided at the lower part of the head 8, which is driven vertically in synchronization with a main shaft of the sewing machine (not shown), and which is laterally driven to swing by a needle swing actuator 10, which will be described later. A feed dog 16 is provided on the upper surface of the bed 2 near the position where the needle 12 falls, and the feed direction and feed amount of the work cloth are determined by a feed actuator 14 (to be described later). A desired stitch pattern is formed on the work cloth by cooperation with the workpiece cloth. The needle 12 and the feed dog 16 constitute a stitch forming mechanism, and the actuators 10 and 14 and the sewing machine main shaft (not shown) described later constitute an actuating device.

A pattern selection push button 18 and a pattern display 20 are provided on the front surface of the arm portion 6, which is the side facing the operator. The pattern display device 20 includes a display board 26 on which a plurality of pattern symbols 22 representing pre-stored patterns and a programming symbol 24 representing patterns programmed by a programming operation described below are displayed, and each of the above-mentioned patterns. symbol 22
and LEDs (light emitting diodes) 28 disposed corresponding to the pattern selection buttons 18 and 24, respectively, and when the pattern selection push button 18 is pushed in, the LEDs 28 are selectively turned on, so that the sewing machine can select which pattern to use. It is designed to display whether the machine is set to sew.

On the front surface of the pedestal section 4, four push buttons and four LEDs including three 7-segment LEDs for displaying numerical values are arranged in the vertical direction so that the push buttons and the LEDs form pairs, respectively. A pair of push buttons and a numerical display LED located at the top of these are used as a needle swing amount adjustment button 30 and a needle swing indicator 32, respectively. A feed indicator 36, a load button 38, and a stitch count indicator 40, and the bottom pair is a memory button 42.
The programming status indicator 44 consists of a simple blinking LED.

The needle swing amount adjustment button 30 and the feed amount adjustment button 34 before manual operation are used to adjust the needle swing data and feed amount of the position data of each stitch, respectively, when the sewing machine is set to a state where sewing is possible, a so-called sewing state. The ratio of the displacement amount of the needle swing actuator 10 and the feed actuator 14 controlled by the data is set, and the size of the set ratio is displayed on the needle swing indicator 32 and the feed indicator as indicators. 36, each numerical value is displayed. On the other hand, when the sewing machine is set to a programming state in which sewing is not possible and only programming operations are possible, the needle swing amount adjustment button 30 and the feed amount adjustment button 34 are stored in a RAM (random access memory) 46, which will be described later. This data is used to set and input needle swing data and feed data, which are position data for moving the needle, and the needle swing data set by pressing the needle swing amount adjustment button 30 is The feed data set by pressing the feed amount adjustment button 34 is numerically displayed on the display 32 and on the feed display 36, respectively.

Load button 38 loads position data into RAM 4 for each stitch.
6, and by pressing this button 38, the needle swing data set by the needle swing amount adjustment button 30 and displayed on the needle swing display 32 and the feed amount adjustment are The feed data set by the button 34 and displayed on the feed display 36 is
It is written to RAM46. The stitch count display 40 is used to numerically display the number of times the load button 38 has been pressed, and the displayed value is incremented by 1 in conjunction with the load button 38 operation. It is being done.

The memory button 42 is used to switch the operating state of the sewing machine between a sewing state and a programming state, and when the sewing machine is in the sewing state and the programming symbol 24 is selected by the pattern selection button 18. button 42 in the
When the button 42 is pressed, the sewing machine is set to the programming state, and when the sewing machine is in the programming state, pressing the button 42 causes the sewing machine to start sewing from the programming state. It is now possible to switch between states. Then, the state of the sewing machine changed by the above operation is
This is displayed by flickering the programming status indicator 44 on and off.

A start/stop button 48 is provided on the lower front surface of the head 8 for instructing the sewing machine to start or stop each time the button is pressed.

Next, an example of the control circuit provided in the sewing machine of the present invention will be explained with reference to the block diagram shown in FIG. In FIG. 2, 50 is a pattern selection switch that is closed by pressing the pattern selection button 18, and each time the switch 50 is closed, a selection operation signal SP1 is sent to the pattern selection device 52 and the programming control circuit. 54. Pattern selection device 5
2 is a counter that counts the selection operation signal SP1;
For displaying each symbol 22, 24 on the pattern display 20
It is a well-known circuit consisting of an LED 28 and a decoder etc. that selectively drives the LED 28 according to the pattern signal SM which is the count output of the counter,
While displaying the selected pattern by lighting on the pattern display 20, the pattern signal SM is sent to the address counter 56, and the programming control circuit 54 sends the programming symbol selection signal SP2 only when the programming symbol 24 is selected. The data is sent to the data multiplexer 58, which is a position data switching circuit, and the RAM 46. still,
RAM 46 is writable only when programming symbol selection signal SP2 is supplied. Further, the count contents of the address counter 56 are automatically cleared when power is turned on to the control circuit shown in FIG. 2 by pressing a power-on switch (not shown). This is the same for all counters and FF (flip-flops), which will be described later, that have a clear function.

The address counter 56 also serves as the pattern selection device 52.
It is a well-known circuit similar to the above, and is composed of a start address memory, a counter, an end code discrimination circuit, etc. The start address memory is configured to preset the counter with an initial value (start address) according to the contents of the pattern signal SM from the pattern selection device 52, and the counter starts counting from this preset value. ing. This count is calculated by the timing signal generator 6
This is done by the timing signal TP from 0,
The address signal SA, which is the content of the count, is stored in a ROM (read-only memory) 62 as a fixed memory.
It is now being sent to Then, when the address signal SA reaches a predetermined count value for each pattern, a load signal is sent to the counter from the termination code discrimination circuit that detects the termination code output from the ROM 62, and the counter reloads the first address. Ru. Therefore, address counter 5
6 repeatedly sends out to the ROM 62 an address signal SA having count contents in a certain range predetermined for each pattern. Note that the timing signal TP
is generated in synchronization with the main shaft of the sewing machine that causes the needle 12 to move up and down, which is a sewing operation, and contains one pulse per rotation of the main shaft. This timing pulse TP is also sent to the programming control circuit 54.

The ROM 62 includes a display board 26 of the pattern display 20.
A plurality of position data groups corresponding to the pattern symbol 22 written in , that is, a plurality of needle swing data groups and a feeding data group paired with these data groups are stored at predetermined addresses, and each of the above-mentioned In response to an address signal SA corresponding to a pattern, a group of position data corresponding to the selected pattern is selectively output. The selected output position data group is then sent to port P1 of the data multiplexer 58, which serves as a position data switching circuit. On the other hand, port P of the data multiplexer 58
2 is supplied with a group of positional data written in the RAM 46 through a programming operation, as will be made clear from the description below, and the positional data group input to the port select PS is Depending on the presence or absence of the programming symbol selection signal SP2 from the pattern selection device 52, either one of the position data group from the ROM 62 or the position data group from the RAM 46 is selectively output. Of the position data group, the data group for needle swing is sent to the needle swing adjustment circuit 66 as a needle swing signal SN via the D/A converter 64, and the data group for feeding is sent via the D/A converter 68 to the needle swing adjustment circuit 66. The signal is then sent to the feed adjustment circuit 70 as a feed signal SF.

It should be noted that the position data group output from the data multiplexer 58 is temporally continuous position data corresponding to a plurality of stitch formation positions, and in reality, the position data for each stitch formation position is Corresponding position data are sequentially output in synchronization with the timing signal TP, that is, the rotation of the sewing machine main shaft.

The needle swing adjustment circuit 66 and the feed adjustment circuit 70 are well-known circuits having similar configurations, and are based on needle swing signals from the D/A converters 64 and 68.
After dividing the SN and sending signal SF into multiple voltage levels, the voltage at one of the divided voltage levels is
The needle swing adjustment signal NSD and the feed adjustment signal FSD, which are adjustment data from the needle swing data input circuit 72 and the feed data input circuit 74, are selectively outputted and outputted respectively to the needle swing actuator drive control circuit 76 and the feed adjustment signal FSD. The configuration is such that the signals are sent to the feed actuator drive control circuit 78, respectively. The needle swing actuator drive control circuit 76 is configured to power amplify the output signal from the needle swing adjustment circuit 66 and send it to the needle swing actuator 10, and the one-way feed actuator drive control circuit 78 similarly performs the power amplification of the output signal from the needle swing adjustment circuit 66. The output signal from the adjustment circuit 70 is power amplified and sent to the feed actuator 14. That is, the swing position of the needle 12 is determined by the needle swing signal.
Identified by SN and needle swing adjustment signal NSD,
The feed direction and feed amount of the work cloth are specified by the feed signal SF and the feed adjustment signal FSD, and the pattern selected by pressing the pattern selection button 18 on the work cloth is Signal NSD and
It is designed to be formed in a size that corresponds to the contents of the FSD. In this embodiment, the feed adjustment circuit 70 includes a resistor group 80 that divides the needle swing signal SF from the D/A converter 68 into five voltage levels, and a resistor group 80 that divides the voltage of each level divided by the resistor group 80. The feed adjustment signal FSD is input to the port selector PS of the multiplexer 82 to select one of the ports P1 to P5. Then, the voltage applied to that port is output.

When the programming symbol 24 is selected on the pattern display 20 by pressing the pattern selection button 18 and the programming symbol selection signal SP2 is output from the pattern selection device 52, the memory button 42 is pressed. When the memory switch 84 is closed by a pressing operation, the programming control circuit 54, and thus the sewing machine, is set to the programming state. That is, memory switch 8
4 is connected to the T input of the T-type FF 86, as shown in FIG. 3, and the output state of the T-type FF 86 is inverted every time the switch 84 is closed. Therefore, in this embodiment, the memory switch 84 and the T-type FF 86 constitute a state switching circuit. As is clear from FIG. 2, this T-type FF 86 has an output terminal connected to the programming status display 44 and the motor drive control circuit 88, and the display 44 and the control circuit 88 indicate the programming status of LOW level. A display signal SP3 is sent out. Programming status indicator 44
is designed to flicker to indicate that the sewing machine is in the programming state when the sewing machine is set to the programming state by pressing the memory switch 84, while the motor drive control circuit 88 In the programming state, the current supplied to the sewing machine motor 90 is cut off, and the sewing operation of the sewing machine is prohibited.

On the other hand, the programming status display signal SP3 is
The signal is sent to the NOR circuit 92. This NOR circuit 92
is a load signal which is the logical sum of the programming state display signal SP3 and the load switch 94 which is closed by pressing the load button 38.
The load signal SP4 is outputted to the load terminal of the RAM 46 each time the load switch 94 is closed. The load signal SP4 from this NOR circuit 92 is applied to the monostable multivibrator 9 which operates at the falling edge of the input.
It is also supplied to an OR circuit 98 via 6.
A timing signal TP is also supplied to the OR circuit 98 via a monostable multivibrator 100 that operates at the rising edge of the input, and a count signal SP5, which is the logical sum of the waveform-shaped timing signal TP and the load signal SP4, is It is designed to be supplied to the clock terminal CK of the forward counter 102. Note that when the sewing machine is in the programming state, the sewing machine motor 90 is not driven and the rotation of the sewing machine main shaft is stopped, as described above, and the count signal SP5 is generated when the load button 38 is pressed. On the other hand, when the sewing machine is in the sewing state, the load signal SP4 is generated by the NOR circuit 92.
The timing signal TP is generated only in synchronization with the rotation of the main shaft of the sewing machine. That is, the 50-decimal counter 102 counts the number of times the load button 38 is pressed in the programming state, and counts the timing pulse TP in the sewing state.

The clear terminal CL of the 50-decimal counter 102 has
Clear signal from programming control circuit 54
SP6 is now available. This clear signal SP6 is an input to which the output signal SP10 of the sending data discrimination circuit 104, the adjustment data load signal SP7 which is the output signal of the OR circuit 106, and the programming state setting signal SP8 which is the output signal of the monostable multivibrator 108 are input. OR circuit 1
10, and the 50-decimal counter 102 is cleared each time these signals are generated. Note that the count output of the 50-decimal counter 102 is output from the address terminal of the RAM 46.
It is designed to be sent to the AD and stitch count display 40. The stitch count display 40 is a well-known circuit composed of a decoder and a numerical display LED, and is adapted to display the count contents of the 50-decimal counter 102 numerically.

The input of the OR circuit 106 is the selection operation signal SP.
1 and the programming state display signal SP3 are supplied, the sewing machine is in the sewing state, and the pattern selection switch 50 is operated to close.
Adjustment data load signal SP7 is adapted to be generated. That is, even if programming symbol 24 is selected as the pattern to be sewn when the sewing machine is in the sewing state, the 50-decimal counter 1
02 is automatically cleared. The adjustment data load signal SP7 is also sent to the needle swing data input circuit 72 and the feed data input circuit 74.

Furthermore, a programming state display signal SP3 is supplied to the monostable multivibrator 108, which is activated at the falling edge of the input signal, and the closing operation of the memory switch 84 causes the sewing machine to switch from the sewing state to the programming state. At this time, the multivibrator 108 outputs the programming state setting signal SP8, and
A clear signal SP6 is output from the OR circuit 110. Therefore, each time the memory button 42 is operated,
50-decimal counter 102 and 32-needle counter 1 described later
22 is automatically cleared. Incidentally, the programming state setting signal SP8 is also input to both data input circuits 72 in the same way as the adjustment data load signal SP7.
and 74.

Since the needle oscillation data input circuit 72 and the feed data input circuit 74 have the same circuit configuration, the feed data input circuit 74 will be described below.

The adjusted data load signal SP7 from the programming control circuit 54 is supplied to a load terminal LD of a quinary counter 112 with a frequency division function of the sending data input circuit 74. This quinary counter 112 is connected to that of the data input circuit 72 for needle swing and the two adjustment circuits 66 and 7 described above.
0 constitutes an adjustment device, and the quinary counter 112 includes an adjustment data setter 1.
14 are connected, and a predetermined number from 0 to 4 is connected.
Among them, the most frequently used predetermined data, for example, data "3" is supplied. Then, when the sewing machine is in the sewing state, when the pattern selection button 18 is pressed and the adjustment data load signal SP7 is generated, the adjustment data "3" set in advance in the adjustment data setter 114 is It is loaded into the 5-ary counter 112, and the 5-ary counter 112 sends this "3" as an adjustment signal.
It is automatically output as FSD.
Further, a feed amount adjustment switch 116 is connected to the clock terminal CK of the quinary counter 112, and is closed by pressing the feed amount adjustment button 34, and after loading by the adjustment data load signal SP7, When the feed amount adjustment button 34 is pressed, the quinary counter 112 changes to the load value "3" based on the closing operation of the feed amount adjustment switch 116.
Count from . As a result, the feed adjustment signal
The contents of FSD are sequentially “3” → “4” → “0” →
The number is changed from "1" to "2".
Therefore, when sewing is performed while the pattern selection button 18 is simply pressed, data "3" is supplied to the port selector PS of the multiplexer 82 of the feed adjustment circuit 70 as the feed adjustment signal FSD. Data “3” from where
A port corresponding to, for example, port P2 is selected as the input of the multiplexer 82, and the feed signal SF, which is the output signal of the D/A converter 68, is adjusted to the most frequently used value and sent to the feed actuator drive control circuit 78. It will be sent. On the other hand, if the feed adjustment signal FSD is changed after loading as described above, the ports selected by the multiplexer 82 will also be sequentially changed from P2 → P1 → P5 → P4 → P
3, so that the multiplexer 82 outputs a voltage according to the content of the feed adjustment signal FSD. That is, when the sewing machine is in the sewing state, the feed amount of the work cloth is selectively adjusted by pressing the feed amount adjustment button 34. This feed amount, ie, the data content of the feed adjustment signal FSD, is sent to the feed display 36 via the multiplexer 124 of the feed data input circuit 74, as will be described later, and is displayed numerically there.

Note that the circuit configuration of the needle swing data input circuit 72 is almost the same as that of the feed data input circuit 74 as described above, and in the sewing state where the pattern selection button 18 is simply pressed, the needle The data content of the swing adjustment signal NSD is automatically set to the predetermined most frequently used content, and the hand 12 is driven in accordance with the data content. On the other hand, the pattern selection button 18
After the pressing operation, when the needle swing amount adjustment button 30 is pressed and the needle swing amount adjustment switch 120 is closed, the data content of the needle swing adjustment signal NSD is changed according to the number of times the switch is closed. The amount of swing of the needle 12 is controlled to change depending on the data content. At this time, the needle swing indicator 32 numerically displays the data content of the needle swing adjustment signal NSD.

The sending data input circuit 74 includes, in addition to the quinary counter 112 and the adjustment data setter 114, a 32-ary counter 12 as a generator of a programming circuit that generates position data to be programmed.
2 and a multiplexer 124 as a data supply circuit to the RAM 46. A feed rate adjustment switch 116 is connected to the clock terminal CK of the 32-ary counter 122 equipped with a frequency dividing function, while the programming state setting signal SP8 from the programming control circuit 54 is supplied to the clear terminal CL. It's getting old. When the sewing machine is switched from the sewing state to the programming state, it is automatically cleared, and after the sewing machine is set to the programming state, each time the feed amount adjustment switch 116 is closed by pressing the feed amount adjustment button 34. , the contents of the count are made to progress. The count output of the 32-ary counter 122 is sent to port P2 of the multiplexer 124, while the other port P1 of the multiplexer 124 is connected to the 5-ary counter 112.
The feed adjustment signal FSD which is the output of is inputted. Depending on the counter output selection signal SP9 supplied to the port selection terminal PS, the multiplexer 124 outputs the feed adjustment signal FSD inputted to the port P1, or outputs the feed adjustment signal FSD inputted to the port P2. It is designed to output counting output. The counter output selection signal SP9 is as shown in FIG.
The programming symbol selection signal SP2 and the programming state display signal SP3 are logically extracted by the OR circuit 126, and the programming symbol 24 is selected by pressing the pattern selection button 18, or by pressing the memory button 42. Thus, when programming control circuit 54 is set to the programming state, multiplexer 12
4 is supplied. Then, within this period, the multiplexer 124 outputs the counting output of the 32-ary counter 122, and during other periods, it outputs the feed adjustment signal FSD of the counting output of the 5-ary counter 112.

The feed counter signal FC output from the multiplexer 124 is sent to the feed indicator 36 and the RAM 46, respectively. The feed indicator 36 is a well-known circuit consisting of a decoder and a numerical display LED, and is a feed counter signal.
The FC data contents are displayed numerically. That is, in the programming state of the sewing machine where the programming symbol 24 is selected and the programming control circuit 54 is set to the programming state, the feed indicator 36 indicates the feed set by pressing the feed amount adjustment button 34. The count output of the 32-decimal counter 122, which is position data, is displayed numerically, and when a sewing machine other than the above is set to the sewing state, a 5-decimal counter that is also set by pressing the feed amount adjustment button 34 is displayed. The counting output of 112, that is, the data content of the feed adjustment signal FSD is displayed numerically. As a result, the feed indicator 3 is displayed during the sewing state.
The feed adjustment value of the work cloth is recognized by the display 6, while in the programming state,
The feed position data representing the feed direction and feed amount of the work cloth, which is supplied to the RAM 46, is recognized.

Note that this also applies to the needle swing line side. That is, the needle swing counter signal outputted from the needle swing data input circuit 72 and supplied to the needle swing indicator 32 and RAM 46.
The contents of NC are switched and controlled by the counter output selection signal SP9 from the programming control circuit 54, and when the sewing machine is in the sewing state, the needle swing adjustment signal NSD is used, and when the sewing machine is in the programming state, the needle swing amount is adjusted. This is the count output of the 32-decimal counter 122, which is set by pressing the button 30. In the sewing state, the needle swing adjustment amount is recognized by the numerical display on the needle swing indicator 32, and in the programming state, the needle position data representing the needle swing amount supplied to the RAM 46 is recognized. -ing

On the other hand, when the sewing machine is in the programming state, the feed position data representing the feed direction and feed amount, and the needle position data representing the needle swing amount, which are supplied to the RAM 46, are supplied to the RAM 46 by the load signal SP4.
Every time it is input to the load terminal LD of RAM46,
That is, each time the load button 38 is pressed and the load switch 94 is closed, the data is written into the address specified by the count output of the 50-decimal counter 102 of the RAM 46. This writing operation is performed for each stitch forming position, that is, for each stitch.
and the press operation of the feed amount adjustment button 34, and the load button 3 for writing the data into the RAM 46, which is performed subsequent to the press operation.
By performing the pressing operation 8, a series of position data consisting of feed position data and needle position data corresponding to a desired pattern is sequentially stored in the RAM 46. The write position in the RAM 46 of the above series of position data is determined by the 50-decimal counter 10 based on the pressing operation of the load button 38.
The position data is automatically specified by the counting operation of 2, and in this embodiment, position data up to the 50th stitch can be stored. Note that when the number of stitches of the desired pattern is less than 50 stitches, a predetermined end code is written at the next feed data write position after the final position data. Therefore, as is clear from the above description, in this embodiment, the RAM 46, programming control circuit 54, 50-decimal counter 102 and 32
A programming circuit is constituted by the advance counter 122 and the like.

After the write operation has been performed as described above, when the memory button 42 is pressed,
The T-type FF 86 is reversed and the sewing machine is switched from the programming state to the sewing state. T type
The programming state display signal SP3 disappears due to the reversal of FF86, and thereby the programming state display 44 is turned off to indicate that the sewing machine is in the sewing state, while the operation of the motor drive control circuit 88 is stopped. The permission is granted and the sewing machine motor 90 can be driven. When the sewing machine motor 90 is driven, the sewing machine main shaft is rotated, and the timing signal generator 60 generates the timing signal TP.
Then, as described above, this timing signal TP is input as the count signal SP5 to the clock terminal CK of the 50-decimal counter 102, and the 50-decimal counter 102
count up. At this time, programming symbol selection signal SP2 is set to programming symbol 24.
is selected, the RAM 46, under the control of the programming symbol selection signal SP2, sequentially reads out the position data written by the above-mentioned write operation based on the count output of the 50-decimal counter 102. This is sent to port P2 of data multiplexer 58.
Of the position data read from the RAM 46, the feed position data FPD is sent to the feed data discrimination circuit 104 of the programming control circuit 54. And 50 base counter 1
If the end code is sent to the sending data discrimination circuit 104 before the count output of 02 becomes "49",
The discrimination circuit 104 is configured to generate a pulse output, and the pulse output is sent to the 3-input OR circuit 11.
0 to the clear terminal CL of the 50-decimal counter 102 as a clear signal SP6. Therefore, even if the position data written in the RAM 46 is less than 50 stitches,
The position data in the RAM 46 will be automatically and repeatedly read out.

In this embodiment with the above-described configuration, the ROM 6
When you select one of the patterns stored in step 2 and want to form it on the processed cloth, or
If you wish to form a pattern programmed in the RAM 46 on the work cloth, simply press the pattern selection button 18 and press the pattern display 20.
It is sufficient to light up the LED 28 corresponding to the desired symbol among the symbols 22 and 24 above.Furthermore, when it is desired to adjust the size of this pattern, that is, the size in the needle swing direction and the work cloth feeding direction, respectively. , needle swing indicator 32 and feed indicator 3
While checking the displayed value of 6, press the needle swing amount adjustment button 30.
and the feed rate adjustment button 34, respectively, and stop these operations when the numerical values displayed on the respective indicators 32 and 36 reach the desired values.

On the other hand, when writing position data corresponding to a desired pattern into the RAM 46, select the programming symbol 24 on the pattern display 20 by pressing the pattern selection button 18, and at the same time press the memory button 42. After setting the sewing machine to the programming state, check the displayed values of the needle swing data and feed data supplied to the RAM 46 on the needle swing display 32 and the feed display 36, and set the needle swing amount. Adjustment button 30 and feed amount adjustment button 3
4, and when both of the above data become the desired data, the load button 38 is pressed to write this into the RAM 46. Then, after performing the above operation for each stitch (one stitch) forming the pattern and writing all the position data of each stitch corresponding to the desired pattern, the feed amount adjustment button 34 is further pressed. Operate to create an end code and write this next to the final position data of the above pattern. The number of stitches that the data to be programmed corresponds to is displayed numerically on the stitch number display 40, so the writing operation is performed while checking this stitch number display. be.

After the writing operation is completed, the sewing machine is automatically set to the sewing state simply by pressing the memory button 42.

As is clear from the above description, according to the present embodiment, the needle swing amount adjustment button 30 and the feed adjustment button 34 used in the sewing state, as well as the needle swing amount display 32 and the feed display 36, are replaced by the memory button. When it is switched to the programming state by pressing 42, it is also used for setting programming data, so the structure is simple and the cost is relatively low.

Furthermore, when writing to the RAM 46, the data for needle swing and feed, as well as the data for the number of stitches, are all displayed numerically, so there is an advantage that there is very little risk of setting the written data incorrectly.

In the above embodiment, the 50-base counter 102 is used as the address counter of the RAM 46, and the storage capacity of the RAM 46 is set to 50 stitches, but the present invention is not limited to this, and various N-base counters may be used. be able to.

Further, in the above-described embodiment, when the programming state of the sewing machine is selected, the programming symbol selection signal is set such that if the programming symbol 24 is not selected, the display of the programming state and the programming operation are prohibited.
AND gates may be provided at the inputs of programming status indicator 44 and binary counter 122 that are opened by the application of SP2. In the above-described embodiment, even if the programming state is selected and the programming operation is performed while the programming symbol 24 is not selected,
Since the RAM 46 is configured to be writable only while the programming symbol selection signal SP2 is being supplied, there is no problem.

In addition, the end data of the position data written in the RAM 46 was configured to be written to the feed data side, but it is written to the needle swing data side, and this needle swing data is used by the programming control circuit 54 to determine the feed data. It may be configured such that it is supplied to the circuit 104.

Furthermore, a data input circuit 7 for both needle swing and feeding.
As for the 2,74 32-decimal counter, a counter other than the 32-decimal counter may be used.

In addition, the electronic sewing machine according to the present invention can be configured so that only patterns programmed by the user can be sewn. That is, in this case,
The circuits such as the pattern display device 20, pattern selection device 52, address counter 56, ROM 62, data multiplexer 58, and pattern selection button 18 as in the previous embodiment are not necessary, and the output of the RAM 46 is directly transferred to the D/A converter 64. and 68 to the needle swing adjustment circuit 66 and the feed adjustment circuit 70. At this time, the state of the sewing machine is changed only by pressing the memory button 42.

Further, in the circuit shown in FIG. 2 described above, the circuits excluding the input/output related portions may be partially or entirely constructed by a microcomputer.

In addition, it goes without saying that the present invention can be implemented with various modifications and improvements without departing from the spirit thereof.

[Brief explanation of the drawing]

FIG. 1 is a front view of a programmable sewing machine showing an embodiment of the present invention, FIG. 2 is a block diagram showing a control circuit of the sewing machine shown in FIG. 1, and FIGS. FIG. 2 is a block diagram showing in more detail the programming control circuit and sending data input circuit in FIG. 2; 10: Needle swing actuator (actuating device), 1
4: Feed actuator (actuating device), 12: Needle (stitch forming mechanism), 16: Feed dog (stitch forming mechanism),
20: Pattern display, 30: Needle swing amount adjustment button (manual operation body), 34: Feed amount adjustment button (manual operation body), 3
2: Needle swing indicator (display), 36: Feed indicator (display), 38: Load button, 40: Number of stitches indicator,
42: Memory button, 44: Programming status display, 46: RAM (memory) (programming circuit), 54: Programming control circuit (programming circuit), 102: 50-decimal counter (programming circuit), 122: 32-decimal counter (generation Department)
(Programming circuit), 52: Pattern selection device, 5
8: Data multiplexer (position data switching circuit), 62: ROM (fixed memory), 66: Needle swing adjustment circuit (adjustment device), 70: Feed adjustment circuit (adjustment device), 112: Quintal counter (adjustment device) ,7
2: Needle swing data input circuit, 74: Feed data input circuit, 84: Memory switch (state switching circuit), 86: T-type FF (flip-flop) (state switching circuit), 88: Motor drive control circuit, 90:
Sewing machine motor, 124: Multiplexer (data supply circuit).

Claims (1)

[Scope of Claims] 1. Adjustment data is generated in response to the operation of a manual operating body disposed on the front surface of the sewing machine, and position data corresponding to the formation position of each stitch in the pattern is adjusted in accordance with the adjustment data. In an electronic sewing machine, the electronic sewing machine is equipped with an adjustment device for adjusting the sewing machine, a display placed on the front surface of the sewing machine for displaying the adjustment data, and an actuation device for operating the stitch forming mechanism according to the adjusted position data. a programming circuit comprising: a generator that generates the position data corresponding to the formation position of each stitch in the pattern in response to an operation of the manual operating body; and a memory that sequentially stores the generated position data; , a state switching circuit that switches the operating state of the sewing machine between a sewing state in which the operating device is operated to form a pattern and a programming state in which the programming circuit is operated; and a position generated from a generating section of the programming circuit. A programmable electronic sewing machine comprising: a data supply circuit responsive to operation of said state switching circuit to selectively supply data and said adjustment data to said display. 2. The electronic sewing machine includes a fixed memory that stores position data for forming a plurality of predetermined patterns, a pattern selection device that selects one pattern from the plurality of patterns, and a pattern selection device that stores position data for forming a plurality of predetermined patterns. 2. A position data switching circuit as claimed in claim 1, further comprising a position data switching circuit responsive to operation of said pattern selection device to switch data and position data from a memory of said programming circuit to said actuating device. Programmable electronic sewing machine. 3. The programmable electronic circuit according to claim 1, wherein the state switching circuit supplies a signal to a motor drive control device to inhibit driving of the sewing machine motor when the operating state of the sewing machine is switched to the programming state. sewing machine.