JPH0129592B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a sewing machine that operates a stitch forming mechanism to form a desired stitch pattern based on a signal from an electronic storage device that stores sewing information for a large number of different stitch patterns. The present invention relates to a pattern selection device for a sewing machine that allows one stitch pattern to be selected from among the stitch patterns by operating a single operating means, and allows specific patterns to be selected individually.

Conventionally, when selecting a pattern in the above-mentioned sewing machines, so-called electronic sewing machines, it has been known to provide a selection switch for each individual pattern, or to sequentially shift patterns using a single selection switch. However, in the former method, a large number of selection switches are required to correspond to the stitch patterns, resulting in high costs and disadvantages such as taking up a lot of space on the sewing machine, and in the latter method, Since the shifting interval is constant, when the interval is long, it takes a long time to select the pattern, and when the interval is short, when selecting the desired pattern, the shift may go too far than the desired pattern and the pattern may have to go around again. This has resulted in the drawback that the work has become complicated and efficiency has been significantly lowered by having to be careful about shifts.

The present invention aims to eliminate the above-mentioned conventional drawbacks.

An embodiment of the present invention will be described with reference to the drawings. A display panel 3 is provided on the front end surface of the sewing machine arm 1. The display panel 3 has display sections 2a, 2b, . . . 2z corresponding to each stitch pattern arranged in a line in the horizontal direction. Light-emitting members 4a, 4b...4z are provided on each display section 2, and the display section on the left end of Fig. 1 shows three specific stitches that are most frequently used: straight stitch, buttonhole stitch, and zigzag stitch. Display parts 2a, 2b, 2 corresponding to the eye pattern
c, and individual selection buttons 5, 6, and 7 are arranged on the three display sections 2a, 2b, and 2c, respectively.
Separately from these, a shift selection button 8 for fast forwarding and a shift selection button 9 for slow forwarding are arranged.

Next, the electric circuit shown in FIG. 2 will be explained.
SW1 is a normally closed switch that corresponds to the shift selection button 8 for fast forwarding, and SW2 is a normally closed switch that corresponds to the shift selection button 9 for slow forwarding.
SW3-SW5 are normally closed switches corresponding to individual selection buttons 5-7.

O・S is a pulse oscillator that oscillates a high level pulse at a constant period of 30 msec on its Q output when a low level is input to the R terminal, and T・M is a pulse oscillator with a pulse period of 450 msec, which is longer than the pulse period of the oscillator O・S. It is a timer circuit that oscillates pulses, and OM1 and OM2
is a one-shot multi.

D and C are decoders and binary counters
Output to turn on one of the light emitting diodes La to Lz corresponding to each light emitting member 4a to 4z according to the input state when inputting CT (for example, hexadecimal) Qa to Qd output to the A to D terminals. One of the terminals is set to L level. The counter CT counts when the input terminal T rises, generates a binary code output to the Qa to Qd terminals, connects the reset terminal to SW3,
In addition, the load terminal l becomes L level and Da~Dd
One of the terminals becomes H level, and when the T terminal rises, its outputs Qa to Qd become output states corresponding to the Da to Dd terminals.

MC is a microcomputer that includes an electronic storage circuit ROM and a CPU, and has counters C and T.
One of the stitch patterns stored in the storage circuit is selected in response to the Qa to Qd outputs, and information can be generated in the stitch forming mechanism.

G1 to G7 are IC gates, and I is an inverter.

Next, the operation of this invention will be explained.

When the shift selection button 8 for fast forwarding is pressed, SW1 becomes open, gate G1 becomes an L output, and gate G2 becomes an L output, so the oscillator OS
generates a pulse with a period of 30 msec, and the gate G5 outputs L in accordance with the period, and the counter CT
starts counting and generates a binary code output to the Qa to Qd terminals, which turns on the light emitting diodes La to Lz sequentially from La through the decoder DC, and also turns on the memory circuit of the microcomputer MC. The stitch pattern can be generated by shifting and selecting the stitch pattern accordingly. When the counter CT counts the fourth pulse, that is, when the Qa and Qb terminals are in the L and L states, the gate G6 becomes an H output, triggers the one shot OM1, and makes the Q terminal output an H output, With the rise of gate G4, the timer circuit TM sets the Q terminal output to H output for 450 msec.

As a result, the R input terminal of the oscillator OS becomes H level during that 450 msec, so the oscillation of the oscillator OS is stopped.

Therefore, the light emitting diode continues to be on at the fourth Ld, the light emitting section 4d is turned on, and the memory circuit is also able to generate information on the stitch pattern corresponding to the pattern on the fourth Ld, that is, the display section 2d in FIG. stop in the state. When the timer circuit TM returns after 450 msec has elapsed, the R terminal of the oscillator OS becomes L level and oscillates again. Similarly to the above, the counter CT counts 4 pulses and then starts the timer circuit.
Repeats the operation of stopping for 450 msec depending on the TM output. When the shift selection button 8 is released, SW1 closes, gate G1 outputs H, and oscillator OS stops oscillation and selects the stitch pattern corresponding to the counter CT output when released. do.

When the slow-forward shift selection button 9 is pressed, SW2 becomes open, gate G3 is opened, and the oscillator OS oscillates with gate G1 as L output and gate G2 as H output, and the oscillation pulse causes gate G3 to become H. As a result, the gate G4 becomes an H output, and the timer circuit TM is triggered. When the counter CT counts the first pulse of the oscillator OS, the oscillator OS is counted by the timer circuit TM.
Oscillation is stopped for msec, and after 450 msec, the oscillator OS oscillates one pulse, which is counted by the counter CT, and gate G3 is set to H output, gate G4 is output, and the timer circuit TM is output.
trigger again. Therefore, while SW2 is open, the counter CT is activated by the oscillator OS at 450 msec intervals.
pulses are counted, and the pattern is shifted and selected at that interval.

When the individual selection button 5 corresponding to straight stitching is operated, SW3 is opened, the counter CT is reset, and the Qa to Qd outputs are returned to the initial state, that is,
Set L, L, L, L to select the decoder DC and memory circuit corresponding to straight stitching. When the individual button 6 is operated, SW4 becomes open and the counter CT is turned on.
Da terminal becomes H input, gate G7 becomes H output, L terminal of counter CT becomes L input via inverter I, and one shot OM2 becomes H.
When it is output and falls after a predetermined time, the gate G
5 is the H output, so Qa~Qd of the counter CT
The output is the output corresponding to terminals Da to Dd, that is, H,
In the same way as counting the second pulse from the oscillator OS as L, L, L, select the pattern corresponding to buttonhole sewing and operate the individual button 7 in the same way, the D6 terminal of the counter CT becomes the H input and the corresponding output, “L, H, L, L” is Qa~
Select a pattern compatible with zigzag stitching by sending it to the Qd terminal.

In the present embodiment, shifting in only one direction is possible by operating the shift selection buttons 8 and 9, but shifting in both forward and reverse directions may be made possible by using an UP-DOWN counter.

Further, instead of the timer circuit TM, a counter circuit that generates a signal while counting oscillator pulses corresponding to similar times may be used.

Further, in this embodiment, the pattern unit is made up of four patterns, and the pattern stagnates when shifted to the fourth pattern, but it goes without saying that two or more patterns may be used as one unit.

As described above, according to the present invention, each pattern can be selected by shifting, and specific patterns can be selected individually, so that all the patterns can be sequentially selected by a shift operation using a single operation means. At the same time, specific patterns that are frequently used can be immediately selected using separate operating means, making selection easier and faster with fewer operating means, significantly improving work efficiency and reducing costs. can get.

[Brief explanation of drawings]

FIG. 1 is a perspective view of the sewing machine of this embodiment, and FIG. 2 is an electric circuit diagram.

Claims (1)

[Scope of Claims] 1. An electronic storage means CM that stores stitch information of a plurality of different stitch patterns including a specific pattern, and a display section 2 and a display section that respectively correspond to the stitch patterns stored in the storage means. display means having a light emitting section 4 which is arranged in relation to each other and which indicates the display section corresponding to the pattern to be selected; first operating means 8, 9 which generate a selection signal by operation; It has an oscillator OS that generates pulses at regular intervals, and a counter CT that counts the pulses of the oscillator and outputs the counted value. pattern shifting means for shifting to enable the pattern; second operating means 5, 6, and 7 arranged in relation to a specific pattern and generating a setting signal when operated; A pattern selection device for a sewing machine, comprising: setting means for setting a counter to a count value to be selected, and allowing each pattern to be selected by shifting and specific patterns to be selected individually.