JPS6043987B2 - Sewing machine pattern selection device - 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 stitch information of a large number of different stitch patterns. The present invention relates to a pattern selection device for a sewing machine that selects one stitch pattern from among stitch patterns by operating an operating means, and particularly aims to make the pattern selection operation quick and easy.

An embodiment of the present invention will be described with reference to the drawings. On the front end surface of the sewing machine arm section 1, a display section 2a corresponding to each stitch pattern,
A display panel 3 is provided in which 2b...22 are arranged in a line along the horizontal direction, and light emitting members 4a, 4b...42 are provided on each display section 2,
The display section on the left end of FIG. 1 is provided with display sections 2a, 2b, and 2c corresponding to the three specific stitch patterns that are most frequently used: straight stitch, buttonhole stitch, and zigzag stitch.
Separate selection buttons 5, 6, and 7 for a, 2b, and 2c.
Place. Separately from these, a shift selection button 8 for fast forwarding and a shift selection button 9 for transportation are arranged.
Next, the electric circuit shown in FIG. 2 will be explained.

'SWI is a normally closed switch that corresponds to shift selection button 8 for fast forwarding, SW2 is a normally closed switch that corresponds to shift selection button 9 for transportation, and 5W3 to 5W are to individual selection buttons 5 to 7. It is a compatible normally closed switch.
He said that when the L level is input to the R terminal, the Q output is 30
It is a pulse oscillator that oscillates an H level pulse at a constant cycle of msec, TM is a timer circuit that oscillates a pulse of 450 n1 sec, which is longer than the pulse cycle of the oscillator 0S, and 0M1 and 0M2 are one-shot multi circuits.

D-C is a decoder, and when inputting the Qa-Qd output of the binary counter CT (for example, a decoder) to the A-D terminal, the light-emitting diodes La--corresponding to each of the light-emitting members 4a-4z are activated in accordance with the input state. One of the output terminals is set to L level so as to turn on one of Lz.

The counter CT counts when the input terminal T rises, generates a binary code output to the Qa-Qd terminals, connects the reset terminal to SW3, and also connects the load terminal 1 to the L level and any of the terminals Da to Dd. becomes H level, and when the T terminal rises, its output Qa-Qd becomes Da-
The output state corresponds to the Dd terminal. MC is a microcomputer including an electronic memory circuit (ROM) and a CPU, and selects one of the stitch patterns stored in the memory circuit in response to the Qa-Qd outputs of the counter CT and stitches the stitches. Enables the formation mechanism to generate information. G1 to G7 are IC gates, and I is an inverter. Next, this invention will be explained.

When shift selection button 8 for fast forwarding is pressed, SWl
becomes open, gate G1 becomes L output, and gate G2 becomes L output, so oscillator 0-S becomes 30r11se.
A pulse with period c is generated, gate G5 outputs L in accordance with the period, counter CT starts counting, and Qa
A binary code is output to the -Qd terminal, which emits light through the decoder ■, and the diodes h and z are turned on sequentially starting from La, and the memory circuit of the microcomputer MC also creates a corresponding stitch pattern. This can be generated by selecting a shift.

When the counters C and T count the fourth pulse, that is, when the Qa and Qb terminals are in the L and L states, the gate G
6 becomes an H output, which triggers the one-shot 0M1 to make its Q terminal output an H output, and with the rise of the gate G4, the timer circuit TM makes the Q terminal output an H output for 450 msec. This results in that 450rnsec
During this period, the oscillator TG(7)R input terminal becomes H level, so the oscillation of the oscillator OS is stopped. Therefore, the light emitting diode continues to be on in the fourth Ld, the light emitting part 4d is in the lighting state, and the memory circuit is also in the fourth Ld, that is, the display part 2 in FIG.
The stitch pattern information corresponding to the pattern d is stopped in a state where it can be generated.

When the timer circuit TM returns after 450 msec has elapsed, the oscillator 0S(7)R terminal becomes L level and oscillates again, and the counter CT counts 4 pulses in the same way as above, and then outputs the timer circuit TM. by 45
The operation of stopping for 0rnsec is repeated.

When the shift selection button 8 is released, SWl is closed and the gate G1 becomes an H output, and the oscillator 0S stops oscillation and selects the stitch pattern corresponding to the counter CT output when it is released. do. When the slow-forward shift selection button 9 is pressed, SW2 becomes open, gate G is opened, and gate G1 outputs L, so gate G2 becomes L output, and oscillator G oscillates.
The oscillation pulse causes the gate G3 to output an H signal, and the gate G4 to output an H signal to trigger the timer circuit TM.

When the counter CT counts the first pulse of the oscillator, the oscillator 0S is reset to 450rr]Sec by the timer circuit TM.
After 450 rnsec has elapsed, the oscillator 0S oscillates a single pulse, which is counted by the counter CT, and the gate G3 is made to output an H signal. do. Therefore S
Counter CT is 450ms while W2 is open.
The pulses of the oscillator OS are counted at ec intervals, and the pattern is shifted and selected at the intervals. In the present embodiment, only shifting in the saw 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 may be used which generates a signal while counting the pulses of the oscillator corresponding to the same time. 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, the first operating means 8 that generates a fast-forward signal when operated, and the second operating means 9 that generates a slow-forward signal when operated, are closed in relation to the fast-forward signal, and a predetermined number of The stitch patterns in the unit are taken as one unit, and the stitch patterns and the light emitting parts corresponding to them are shifted at a predetermined interval, and then the next unit pattern is started after the last stitch pattern of one unit is stagnant for a time longer than the shift interval. a first control circuit 0S, which is closed in relation to the slow feed signal and shifts the stitch pattern and its corresponding light emitting portion at intervals equal to the dwell time of the first control circuit; By providing TM and G3, the first operation means can be used to continuously operate up to the pattern unit including the desired pattern without any care, and the second operation means can be used to operate the pattern one by one within the pattern unit. You can select the desired pattern by shifting the
By properly using both operating means, the operator can easily and quickly select a pattern, and does not have to worry about the selection process, resulting in a significant improvement in work efficiency.

[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)

[Claims] 1 An electronic storage means CM that stores stitch information of a plurality of different stitch patterns, a display section 2 corresponding to each of all the stitch patterns to be shifted and selected stored in the storage means, and a display section that corresponds to each of the display sections. a display means having a light-emitting section 4 which is arranged in a manner that indicates the display section corresponding to the selected pattern, a first operation means 8, SW_1 which generates a fast-forward signal when operated, and a second operation means which generates a slow-forward signal when operated. Means 9, SW_2, is closed in relation to the fast-forward signal, and a predetermined number of stitch patterns smaller than the total number of stitch patterns is taken as one unit, and the stitch patterns therein and the light emitting parts corresponding to the stitch patterns are arranged at predetermined intervals. The first control circuit OS, OM_1, TM continues to shift the next unit pattern after being stagnated for a time longer than the shift interval at the last stitch pattern of one unit after shifting, and the circuit is closed in relation to the slow feed signal. and a second control unit O that shifts the stitch pattern and the light emitting unit corresponding thereto at intervals equal to the stagnation time of the first control circuit.
A pattern selection device for a sewing machine equipped with S, G3, G4, TM.