JPH0136392B2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field] The present invention includes an internal memory provided in a sewing machine frame and an external memory that is removable from the sewing machine frame, and a large number of data stored in both memories. The present invention relates to a sewing machine that selects and forms a desired pattern from among patterns.

[Prior Art] Currently, sewing machines have been commercialized that have a small, large-capacity electronic memory installed in the sewing machine frame and selectively form more than 100 patterns stored in the electronic memory. In order to dramatically increase the number of patterns that can be formed compared to a sewing machine, frequently used patterns are stored in an internal memory inside the sewing machine frame, and less frequently used patterns are stored in an external memory that is removable from the sewing machine frame. A sewing machine has been proposed in which both memories can be stored and selected by a changeover switch.

However, when the pattern in the internal memory and the pattern in the external memory are combined to form a pattern, if the external memory is accidentally removed from the sewing machine frame, the swing position and feed movement of the sewing needle with respect to the pattern in the external memory may occur. The setting position of the feed adjuster, which adjusts the sewing speed, becomes uncertain, and there is a risk that the overall shape of the combined pattern may be distorted, damaging the sewn product or causing a collision between the sewing needle and sewing tools such as the presser foot. Ta.

[Purpose] The present invention has been made to solve the above-mentioned problems, and its purpose is to remove the external memory from the sewing machine frame when the pattern in the internal memory and the pattern in the external memory are combined. When the sewing tool is removed by mistake, only the pattern in the external memory in the pattern combination is changed to a specific pattern in the internal memory to create a new pattern combination, thereby preventing collision with the sewing tool and protecting the sewn product. The object of the present invention is to provide a sewing machine that can minimize damage to the sewing machine.

[Solution Means] In order to achieve the above object, the present invention provides information on whether all of a plurality of combined patterns belong to a first pattern group in an internal memory or if there is a second pattern in an external memory in the plurality of patterns. a discriminating means for discriminating whether a pattern of a pattern group is included; and a discriminating means for retaining a current pattern combination when all of the plurality of combined patterns belong to a first pattern group; A control means is provided for changing the pattern of the second pattern group to a specific pattern in the first pattern group to create a new pattern combination when the pattern of the second pattern group is included.

[Operation] The control means controls the pattern combination means according to the determination result of the determination means. That is, the control means retains the pattern combination by the pattern combination means when the external memory is removed in a state in which all of the plurality of combined patterns belong to the first pattern group. Therefore, the pattern combination is not destroyed and there is no need to perform the pattern combination operation again, thereby improving the ease of use of the sewing machine. On the other hand, if the external memory is accidentally removed while a pattern of the second pattern group is included in a plurality of combined patterns, only the included pattern can be identified in the first pattern group. Create a new pattern combination by changing the pattern. As a result, the positions of the sewing needle and the feed adjuster are determined, and collisions between the sewing needle and the sewing tool are prevented.
Furthermore, damage to sewn products can be kept to a minimum.

[Example] An example of the present invention will be described below with reference to the drawings.

First, the basic configuration of this embodiment will be explained with reference to FIG.

An internal memory 12 provided within the sewing machine frame 10 indicated by a dashed line in FIG. 1 stores the first pattern group, and an external memory 14 provided removably with respect to the sewing machine frame 10. stores the second pattern group. The pattern combination means 16 is provided for designating either one of the memories 12, 14 and sequentially designating a desired pattern from both pattern groups to perform pattern combination. In accordance with the memory designation of the pattern combination means 16, the data selection means 18 supplies the stitch data regarding the desired pattern in the designated memory to the stitch forming device 20, and the operation of the stitch forming device 20 produces the desired pattern. is formed. The determining means 22 determines whether all of the plurality of patterns combined by the pattern combining means 16 belong to the first pattern group or whether a pattern of the second pattern group is included in the plurality of patterns. Control means 2
4 controls the pattern combination means 16 according to the detection result of the memory attachment/removal detection means 26 which detects the attachment/detachment state of the external memory 14 and the determination result of the determination means 22, so that all of the plurality of combined patterns are 1st
The pattern combination state by the pattern combination means 16 is maintained when the pattern belongs to the pattern group of the second pattern group, and when detachment of the external memory 14 is detected in a state where the pattern of the second pattern group is included in the combination pattern, the second pattern combination state is maintained.
A pattern of the pattern group is searched from among the combination patterns and changed to a straight seam in the first pattern group, thereby creating a new pattern combination.

Furthermore, details of this embodiment are shown in FIGS. 2 to 8.
This will be explained with reference to the figures.

FIG. 2 shows the appearance of the sewing machine of this embodiment. A needle bar 32, which can move vertically and swing horizontally, is disposed at the head of an upper arm 30 constituting the sewing machine frame 10. A sewing needle 34 is attached to the lower end. In order to transfer the work cloth, a feed dog 38 is disposed within the bed 36 to which a four-movement feed is applied by a known feed mechanism, and the feed movement is controlled by a feed adjuster (not shown).

A display board 40 is fixed to the front surface of the upper arm 30 on which figures and two-digit corresponding numbers are posted for each of the frequently used patterns in the first group of patterns. Further, on the front surface of the pillar section 42, there are ten input keys 44 corresponding to the numbers "0" to "9" respectively for specifying a desired pattern using the corresponding number, and a plurality of input keys 44 for specifying a desired pattern using the corresponding number. A combination key 46 that can be operated for combination is provided. A numeric display 48 is provided to visually display the corresponding number input by the input key 44. Internal memory 12 provided within the sewing machine frame 10 to store frequently used first pattern groups
A memory selection switch 50 is provided which is movable between two selection positions in order to select one of the external memory 14 for storing a second pattern group that is less frequently used. external memory 14
A light emitting diode (see below) that displays the selection status of
LED) 52 are arranged.

The external memory 14 is housed in a memory cassette 54, and the cassette is placed in a storage chamber 56 horizontally bored in the pillar section 42, as shown in FIG.
It is configured to be detachable from the A connector 58 for connecting the external memory 14 to a central processing unit 70, which will be described later, is arranged on the left side of the storage chamber 56. Further, a limit switch 60 is arranged close to the storage chamber 56 to detect whether the memory cassette 54 is attached or removed, and the limit switch 60 corresponds to the memory attachment/detaching detection means 26 in FIG.

Additionally, a start/stop switch 64 is disposed at the head of the upper arm 30 for starting and stopping the sewing machine motor 62.

The electrical configuration of this embodiment will be explained with reference to FIG.

Memory selection switch 50 provides a low level output signal PS1 to central processing unit 70 when in the left position as shown in FIG. Device 70 outputs a low level signal DM that turns off LED 52. Conversely, when switched to the right position to select the external memory 14, it provides a high level output signal PS1 to the central processing unit 70;
As a result, the central processing unit 70 outputs a high-level signal DM that lights up the LED 52. The input key 4 is used to select a desired pattern from the pattern group in the memory selected by the memory selection switch 50.
4 is operated, the encoder 72 generates a code signal PN representing the input corresponding number and a high-level pulse PS synchronized with the completion of inputting the two-digit corresponding number.
2 to the central processing unit 70. At this time, the central processing unit 70 outputs a signal DN for displaying the corresponding number to the number display 48 in accordance with the signal PN. Further, the combination key 46 supplies a high level output signal PS3 when operated and a low level output signal PS3 when released to the central processing unit 70, and the limit switch 60 supplies the memory cassette 54 with a low level output signal PS3 when the combination key 46 is operated.
A high level output signal PS4 is supplied to the central processing unit 70 when the device is attached, and a low level output signal PS4 is supplied to the central processing unit 70 when the device is detached.

The first address memory 74 is connected to both memories 12 and 1.
The central processing unit 70 receives the pattern code signal PAC converted from the signal PS1 and the signal PN and outputs one start address signal HAD. Output. In addition, external memory 1
4, the number of addresses prepared for each pattern is set to be constant regardless of the pattern type, and when using a different external memory, the start address signal AHD regarding the external memory in the start address memory 74 is changed. There's no need. In this embodiment, the internal memory 12 stores stitch number data representing the total number of stitches of each pattern for each pattern of the first pattern group including straight stitches as a specific pattern.
TSN and a group of stitch data SD are stored as a set, and the external memory 14 stores the length of each pattern in the cloth feeding direction and the stitch length of the straight stitch for each pattern of the second pattern group. Stitch number data LSN representing the number of stitches determined based on the pattern, stitch number data TSN representing the total number of stitches of each pattern, and a group of stitch data SD are stored as a set. and,
At the start address specified by the start address signal HAD, only the stitch number data TSN is stored in the internal memory 12, and the stitch number data TSN and LSN are stored as a pair in the external memory,
The stitch data SD is stored at the next address after the first address.

An address signal NTAD representing the address next to the start address represented by the start address signal HAD from the start address memory 74 and stitch number data TSN from the internal memory 12 or stitch number data TSN, LSN from the external memory 14. An intermediate memory 76 is provided to sequentially temporarily store sets of data in response to the operation of the combination key 46, and while the sewing machine motor 62 is operating, the first memory is stored at the address specified by the internal counter C1 of the central processing unit 70. An address signal HAD and stitch number data TSN or stitch number data TSN, LSN are stored, and while the motor is stopped, a head address signal HAD, etc. is output from the address specified by the counter C1.
Input key 44, combination key 4 shown in FIG.
6, memory selection switch 50, encoder 72,
The first address memory 74 and the intermediate memory 76 are
This constitutes the pattern combination means 16 shown in FIG.

The central processing unit 70 receives an address signal output from the intermediate memory 76 while the sewing machine motor 62 is operating.
Load NTAD into internal counter C2 and set sewing needle 3.
Counter C2 is advanced from its address signal NTAD in response to a high level pulse TP generated by timing signal generator 78 when C4 reaches a predetermined position. The contents of counter C2 are used to supply and address the memory designated by memory selection switch 50, and from that designated memory the stitch data SD
is output to the central processing unit 70. Then, the central processing unit 70 supplies the stitch data SD to the actuator drive circuit 80, which drives the needle swing actuator 82 and the feed actuator 84 to adjust the swing position of the needle bar 32 and the above-mentioned feed adjuster. The position is set. The actuator drive circuit 80 and both actuators 82 and 84 constitute the seam forming device 20 in FIG.

The motor drive control device 86 controls the operation of the sewing machine motor 62, and when the start/stop switch 64 is operated while the motor is stopped, it outputs a high-level signal CM indicating motor operation to the central processing unit 70, and also controls the motor. 62 is activated. Conversely,
Low level signal CM indicating motor stop when start/stop switch 64 is operated while motor is running
is output to the central processing unit 70 and the motor 62
to stop. Further, the motor drive control device 86 stops the motor 62 in accordance with a motor stop command from the central processing unit 70.

The operation of this embodiment having the configuration described above will be explained with reference to the flowcharts shown in FIGS. 5 to 8. In the flowchart, a high level state of the signal is represented by "1", and a low level state of the signal is represented by "0".

First, when the sewing machine is powered on, initial settings are performed, and when changing the pattern in the external memory 14 to a straight stitch, the counters C1 and C2 mentioned above, the internal counter C3 that counts the number of stitches, and the combination pattern are stored in the external memory 14. The internal counter C4 used is reset, and a large number of internally prepared flags CF,
BF, MF, and CMF are set to "0".

Here, when the memory cassette 54 for combining the pattern in the internal memory 12 and the pattern in the external memory 14 is attached to the sewing machine frame 10, the limit switch 60 outputs a high level signal PS4 to the central processing unit 70. . Thereafter, when the corresponding number of the desired pattern in the internal memory 12 is input using the input key 44 while the memory selection switch 50 is held in the left position shown in FIG. It is determined and flag BF is “0”
, the signal PS2 from the encoder 72 is determined to be "1", and the code signal PN is stored in the internal memory M1. And “0” of flag BF
is determined, and the signal PS1 and code signal PN are converted into a pattern code signal PAC representing the desired pattern according to conversion for internal memory. Currently flag CF
Since is "0", all contents of the intermediate memory 76 are cleared, and the start address signal HAD is read out from the start address memory 74 by the code signal PAC, and according to the start address signal HAD,
Address signal representing the next address of the first address represented by the address signal HAD
NTAD is determined. Thereafter, it is determined that the flag BF is "0", the stitch number data TSN is read from the start address of the internal memory 12 limited by the start address signal HAD, and the stitch number data TSN is read from the first address of the intermediate memory 76 specified by the counter C1. The above-determined address signal NTAD is stored in the storage section of
and stitch number data TSN are written. After this series of operations is executed, the signal DN is outputted to the number display 48 according to the contents of the memory M1, and the corresponding number of the desired pattern is displayed on the display 48.

Next, in order to combine the patterns in the external memory 14, the memory selection switch 50 is switched from the left position shown in FIG. 2 to the right position, and the combination key 46 is pressed.
, the memory selection switch 50 and the combination key 46 output a high level signal PS1 and a high level signal PS3 to the central processing unit 70. In the central processing unit 70, "1" of the signal PS1 and signal PS4 is determined and the flag BF is set to "1", and "1" of the signal PS3 is determined and the counter C1 is incremented and the flag CF is set to "1". is set to "1". After this, if you input the corresponding number of the desired pattern in the external memory 14,
Similarly to the above, "1" of the signal PS2 from the encoder 72 is determined, and the code signal PN is stored in the memory M1.
The state of flag BF is determined and conversion for external memory is executed. According to this external memory conversion, the signal PS1 and the code signal PN are converted into the pattern code signal PAC representing the desired pattern, and the flag MF is set to "1" to determine the state of the flag CF. Since this flag CF is set to "1", the intermediate memory 76 is not cleared, the head address signal HAD is read out by the code signal PAC, and the address signal NTAD is determined in accordance with the head address signal HAD.

Since the flag BF is currently set to "1", two stitch number data TSN and LSN are read from the address of the external memory 14 specified by the start address signal HAD, and the intermediate stitch number data TSN and LSN are read out from the address specified by the start address signal HAD. The address signal NTAD and the stitch number data are stored in the first storage section of the address of the memory 76.
TSN is written, stitch number data LSN is written to the second storage section at that address, and flag CF is set to "0".

By repeating the operations and operations detailed above, a plurality of patterns in both memories 12 and 14 can be combined, and address signals NTAD and the like related to the combined patterns are temporarily stored in the intermediate memory 76 in the order of combination. Further, as understood from the above, the central processing unit 70 determines whether the pattern specified by the input key 44 belongs to the first pattern group in the internal memory 12 or the second pattern in the external memory 14. The operation of determining whether the pattern belongs to a group is executed in steps ST1 to ST4 shown in FIG. The flag MF is set to "0" in step ST5 to indicate that the first signal is generated when the pattern belongs to the first pattern group, and the flag MF is set to "0" when the pattern of the second pattern group is included in the combined plural patterns. 2
Step ST6 sets the flag MF as the signal is generated.
It is set to "1" in . Therefore, the central processing unit 70 performs the operation of the determining means 22 shown in FIG. 1 by executing steps ST1 to ST6.
A state in which the pattern in the external memory 14 is included in a plurality of patterns combined as described above, that is, a flag
If the operator accidentally removes the memory cassette 54 while MF is set to "1", the limit switch 60 detects the removal and supplies a low level signal PS4 to the central processing unit 70. In the central processing unit 70, it is determined that the flag MF is "1" and the signal PS4 is "0", and in order to notify the operator of this abnormal state,
A signal that causes the LED 52 to blink is output for the time set by the timer. If the memory cassette 54 is not inserted during the set time, a first pattern change routine according to the flowchart shown in FIG. 6 is executed.

When the first pattern change routine is started, the counter C1 is first reset;
The address signal NTAD regarding the first pattern among the combination patterns is read from the address of the intermediate memory 76 specified by 1, and the address signal NTAD is read out from the address of the intermediate memory 76 specified by
NTAD is temporarily stored in internal memory M2. Then, it is determined whether the contents of the internal memory M2 are "0" or not, but in this embodiment, both memories 12,
A zero address is not used as the address represented by the address signal NTAD for each pattern in M2, and therefore it is determined that the contents of the memory M2 are not "0". Further, it is determined whether the value of the address represented by the address signal NTAD in the memory M2 is greater than or equal to the minimum value N of the address represented by the address signal NTAD assigned to the pattern in the external memory 14. When it is smaller than the minimum value N, the process moves directly to the step where the counter C1 is added, but when it is larger than the minimum value N, the stitch number data LSN is stored from the second storage part of the address of the intermediate memory 76 specified by the counter C1. only the first one at the address specified by counter C1 is read out and stored in internal memory M3, and
The address signal regarding the seam directly in the memory of
NTAD and the stitch number data LSN of the internal memory M3 are written, and then the counter C1 is added. The address signal NTAD is read out again by the added counter C1 and stored in the memory M2, and the series of operations described above are repeated. As a result, the external memory 1 in the combined multiple patterns
The set of the address signal NTAD and the stitch number data TSN and LSN regarding the pattern No. 4 is changed into a set of the address signal NTAD regarding the straight stitch and the stitch number data LSN regarding the pattern in the external memory 14 and stored in the intermediate memory 76. As a result, a new combination mechanism is created consisting of the pattern in the internal memory 12 specified at the time of combination and the straight seam changed from the pattern in the external memory 14. If the content of the memory M2 is determined to be "0" after all address signals NTAD in the intermediate memory 76 have been checked, the flag is set.
MF, BF, and CF are all set to "0", and an abnormality display code signal related to the display "FF" indicating an abnormal state is stored in the memory M1.

By executing the first pattern changing routine described above, the contents of the intermediate memory 76 are changed, and after this routine is completed, the operation is shifted to the flowchart shown in FIG.
DN is output and a display "FF" appears on the numeric display 48 to notify the abnormal state.

Therefore, the central processing unit 70 performs steps ST7 and ST8 shown in FIG. 5 and step 1 shown in FIG.
By executing the pattern change routine, the control means 24 shown in FIG. 1 operates.

Next, the operation of forming a combination pattern in which the patterns in both memories 12 and 14 are combined will be explained.

When the start/stop switch 64 is operated to start the sewing machine motor 62, the motor drive control device 86 supplies a high level signal CM representing motor operation to the central processing unit 70. central processing unit 70
, when the signal CM is determined to be “1”, the seventh
The operation according to the flowchart shown in the figure is started, and first the counter C1 is reset. The address signal NTAD and the stitch number data TSN or stitch number data LSN of the first specified pattern are read out from the first storage section at the address of the intermediate memory 76 specified by this counter C1, and the address signal NTAD is read out.
NTAD is loaded into the counter C2, and the stitch number data TSN or stitch number data LSN is loaded into the counter C3. its address signal
It is determined in step ST9 whether the value of the address represented by NTAD is greater than or equal to the above-mentioned minimum value N;
Flag CMF is set to "1" when it is greater than or equal to the minimum value N, and flag CMF is set to "1" when it is smaller than the minimum value N.
is set to "0". Therefore, when the flag CMF is "1", the address signal of the counter C2
This means that NTAD is related to the pattern in the external memory 14, and the flag CMF is "0".
When , it means that the address signal NTAD of the counter C2 relates to the pattern in the internal memory 12.

After that, the state of flag CMF changes to step ST1.
When the flag CMF is "1", the contents of the counter C2 are supplied to the external memory 14, and when the flag CMF is "0", the contents of the counter C2 are supplied to the internal memory 12. Stitch data SD is read from the memory addressed by the counter C2. Therefore, the central processing unit 70 operates the data selection means 18 shown in FIG. 1 by executing steps ST10 to ST12 shown in FIG. Subsequently, in step ST13, it is determined whether the contents of the counter C3 are zero.
When it is not zero, the stitch data SD is output to the actuator drive circuit 80 and used for forming each stitch. And timing signal generator 78
While the signal TP is "0", the states of the flag CMF, the signal PS4, and the signal CM are repeatedly determined. When it is determined that the signal TP has changed to "1", the counter C2 is incremented and the counter C3 is subtracted, and the next stitch data is read out.

When the formation of the initially specified pattern is completed, it is determined in step ST13 that the counter C3 is zero, the counter C1 is incremented, and the address signal NTAD is read from the address of the intermediate memory 76 specified by the contents. signal
The contents of NTAD are determined. At this stage,
Since the content of the address signal NTAD is not "0", the address signal NTAD and stitch number data of the second pattern specified by this counter C1
TSN or stitch number data LSN is in intermediate memory 7
The data is read from the first storage section at address No. 6 and loaded into counters C2 and C3, respectively. This second designated pattern is also formed by performing the same operation as the first designated pattern, and when the pattern formation is finished, the counter C1 is further incremented and the next pattern is formed. Ru. After that, all of the address signals NTAD for the combined patterns are examined, and then the counter C
When the contents of the intermediate memory 76 read out by 1 become 0, the count counter C1 is reset and the initially designated pattern is again formed.

Start/stop switch 6 to stop pattern formation
4, the motor drive controller 86 starts an operation to stop the motor 62 and supplies a low level signal CM to the central processing unit 70 indicating that the motor is stopped. The signal CM is determined to be "0" in step ST14, the counter C1 is reset, the flag CF is set to "0", and the operation of the flowchart shown in FIG. 5 can be executed.

Now, when the memory cassette 54 is removed while the pattern in the external memory 14 is being formed in the combination pattern, the limit switch 60 supplies a low level signal PS4 to the central processing unit 70. At this time, the flag CMF is set to "1" because the pattern in the external memory 14 is formed, and the state of the flag CMF is determined in step ST15 shown in FIG.
"0" of PS4 is determined in step ST16, and the second pattern change routine shown in FIG. 8 is executed.

When that second pattern change routine begins,
The contents of counter C1 are loaded into counter C4, counters C1 and C4 are added together, and the contents of counter C4 read address signal NTAD from intermediate memory 76 and stored in memory M2. Subsequently, determination as to whether the content of the memory M2 is "0" or not and determination as to whether or not the content is equal to or greater than the minimum value N described above are executed in sequence, and when the content is equal to or greater than the minimum value N, the value specified by the counter C4 is executed. intermediate memory 7
Stitch number data from the second storage section at address 6
LSN is read and stored in internal memory M3,
After the address signal NTAD regarding the straight stitch and the stitch number data LSN of the internal memory M3 are written to the first storage section of the specified address, the counter C4 is added, and if it is smaller than the minimum value N, Counter C4 is directly incremented. The address signal NTAD is read out again by the addition of the counter C4. After checking the address signal NTAD regarding the last pattern in the combination pattern, if the content of the memory M2 is determined to be "0", the flag is set.
Both MF and BF are set to "0" and the above-mentioned abnormality display code signal is stored in the memory M1. As in the first pattern changing routine, by executing the second pattern changing routine, the pattern in the external memory 14 in the combined pattern is changed to a straight stitch, thereby creating a new pattern combination. Then, the combination pattern created by the second pattern change routine continues to be formed after the memory cassette 54 is removed, and during the pattern formation, an abnormality is displayed on the numeric display 48 by executing step ST17 shown in FIG. "FF" appears to notify the operator of the abnormal condition.

As described above, in this embodiment, when the memory cassette 54 is removed with the patterns in the external memory 14 combined, the abnormal state is notified to the operator by flashing the LED 52 for a predetermined period of time. Only when the abnormal condition is not resolved by mounting the memory cassette 54, the pattern in the external memory 14 is automatically changed to a straight stitch. Therefore, even if the memory cassette 54 is erroneously removed, destruction of the combination pattern can be prevented as much as possible, which is advantageous in improving the ease of use of the sewing machine. Furthermore, even if the memory cassette 54 is removed by mistake, the pattern is automatically changed to a straight stitch, which is the most frequently used practical mode, in response to the removal, so there is no need to reselect the pattern after the memory cassette 54 is removed. This improves the ease of use of the sewing machine. Furthermore, since the straight seam is formed at a position where there is no risk of collision with sewing tools such as a presser foot or attachments such as a side cutter, the sewing machine is excellent in safety. Furthermore,
In this embodiment, when the memory cassette 54 is removed by mistake, the shape of the straight seam changed from the pattern in the external memory 14 is changed to match the length of the pattern in the external memory 14 in the cloth feeding direction. Since the number of stitches is determined by the stitch number data LSN, the total length of the combination pattern created after the memory cassette is removed is equal to that of the combination pattern before removal, and the sewing schedule on the workpiece cloth is The pattern does not protrude from the area, and damage to the sewn product can be prevented.

The present invention is not limited to the above-described embodiments, and various changes can be made without departing from the spirit thereof.

For example, the number of straight stitches that are changed from the pattern in the external memory 14 when the memory cassette 54 is removed can be set to a constant number, and instead of the straight stitches, a zigzag stitch or a stitch used during normal sewing can be used. You can also create a special pattern that does not.

[Effect] As is clear from the detailed description above, the present invention is capable of determining whether all of the plurality of patterns combined by the pattern combination means belong to the first pattern group in the internal memory or whether there is an external pattern in the plurality of patterns. a determining means for determining whether a pattern of a second pattern group in the memory is included; and retaining a current pattern combination when all of the plurality of combined patterns belong to the first pattern group;
When the external memory is removed while a pattern of the second pattern group is included in the plurality of patterns, the second
By providing a control means for creating a new pattern combination by changing only the patterns in the pattern group to specific patterns in the first pattern group, the external memory is Since the combination pattern is maintained without being destroyed even if it is separated, there is no need to repeat the combination operation, which is advantageous when using the sewing machine. Furthermore, if the external memory is accidentally removed while the combination pattern includes a pattern from the second pattern group, only the pattern from the second pattern group is changed to a specific pattern from the first pattern group. Therefore, the positions of the sewing needle and the feed adjuster can be fixed at a constant position with respect to the specific pattern of the first pattern group, preventing collision between the sewing needle and sewing tool, and preventing damage to the sewn product due to pattern distortion. can be kept to a minimum.

[Brief explanation of drawings]

FIG. 1 is a drawing showing the basic configuration of an embodiment of the present invention, FIG. 2 is a perspective view of the sewing machine of this embodiment, and FIG. 3 is an enlarged sectional view showing a state in which a memory cassette is installed.
Figure 4 is a block diagram showing the electrical configuration of this embodiment, Figures 5 to 8 are flowcharts for explaining the operation of the central processing unit, and Figure 5 is the operation when the sewing machine motor is stopped. FIG. 6 is a flowchart for explaining the first pattern change routine, FIG. 7 is a flowchart for explaining the operation of the sewing machine motor, and FIG. 8 is a flowchart for explaining the operation of the sewing machine motor. 2 is a flowchart for explaining the second pattern change routine. 10: Sewing machine frame, 12: Internal memory, 14:
external memory, 16: pattern combination means, 22: discrimination means, 24: control means, 26: memory attachment/detachment detection means, 44: input key, 46: combination key, 50:
Memory selection switch, 70: Central processing unit, ST
1 to ST17: Step, MF: Flag.

Claims (1)

[Scope of Claims] 1. An internal memory that is provided within the sewing machine frame and stores a first pattern group consisting of a plurality of predetermined patterns; an external memory for storing a second pattern group consisting of a plurality of patterns different from the patterns in the pattern group; and pattern combining means for sequentially specifying and combining a plurality of patterns in both the pattern groups; In a sewing machine that forms a plurality of combined patterns, all of the plurality of combined patterns are formed in the first sewing machine.
discriminating means that generates a first signal when the pattern belongs to the pattern group, and generates a second signal when the pattern of the second pattern group is included in the plurality of combined patterns; When the first signal is generated, the pattern combination by the pattern combination means is held regardless of whether the external memory is attached or detached, and when the second signal is generated and the external memory is removed from the sewing machine frame, The second pattern among the plurality of combined patterns
A sewing machine equipped with a removable external memory including a control means for creating a new pattern combination by changing only the patterns belonging to the first pattern group to a specific pattern of the first pattern group.