JPH0128769Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Application) The present invention relates to a pattern selection device for a sewing machine, and particularly to a safety device for preventing erroneous operation thereof.

(Prior Art) Some sewing machines that select patterns by operating a switch are equipped with a rubber switch or the like to improve operability, and the pattern can be selected by simply pressing the switch lightly. , and models in which selections are made in the same way using a touch switch have been proposed, but while these are easy to operate, they do not allow children to accidentally operate the switch by touching the operating section while sewing. This was not desirable because there was a risk that the stitching would get lost, and the stitch pattern would change unexpectedly.

(Solution Means) The present invention provides a sewing machine in which patterns are selected by these simple switch operations, in which a changeover switch is provided in addition to a plurality of pattern selection switches for selecting each pattern, and one of the changeover switches is If you operate the switch in the operating position, each time you operate the pattern selection switch, the pattern corresponding to that switch will be selected, as in the past.If you operate the switch in the other operation position after selecting a pattern, the pattern selection switch will be selected from then on. This is so that the selection cannot be changed to a new pattern even if the pattern is operated.

(Example) Examples of the present invention will be described below based on the drawings. In FIG. 1, a sewing machine main body 1 is provided with a plurality of pattern selection switches 2 made of rubber switches, each of which has an array of operating sections 3 exposed outside the sewing machine, which can be lightly pressed and operated. When the switch is activated, the pattern corresponding to the switch is selected, and when the switch is released, it automatically returns to the inactive state. The changeover switch 4 is a slide type switch, and its operation part 5 protrudes outside the sewing machine. When the operation part 5 is operated to one operation position, that is, to the left as shown in the figure, each operation of the pattern selection switch 2 is Each time the switch 3 is operated, the pattern corresponding to that switch is selected, and if the switch is operated to the other operating position, that is, to the right, the selection cannot be changed to a new pattern even if each operation section 3 is operated. .

FIG. 2 is a simplified block diagram of the control. In response to the operation of the pattern selection switch 2, the pattern designation signal control device PS gives the pattern designation signal designated by the operation to the latch circuit LA. An operation signal indicating that the switch has been operated is given to the changeover switch 4. When the operating section 5 of the changeover switch 4 is operated to the left as shown in FIG. do. When the button is operated to the right, the latch circuit LA does not receive the operation signal and prevents the pattern designation signal from being latched. The storage device ROM electronically stores each stitch control signal of a plurality of stitch patterns, and reads out the stitch control signal each time a stitch progresses by being addressed by the address device AD, and then outputs the stitch control signal to the stitch forming device. Activate DV. The latch circuit LA gives the corresponding pattern designation signal based on the selection to the address device AD, and the address device AD supplies the upper axis synchronization signal generator PG for each stitch.
When the memory device ROM receives a pulse signal from and advances the address for the pattern, and the storage device ROM reads out the last stitch control signal of the pattern, it generates a pattern end signal, and the addressing device receives this signal and advances the address for the pattern. It returns to the address of the first stitch.

In the above configuration, as described above, when the operation part 5 of the changeover switch 4 is operated to the left operation position as shown in FIG. 1, that is, to the pattern selection side, each time the pattern selection switch 2 is operated, A pattern is selected. When the operation is performed to the right operation position, that is, to the pattern selection prohibited side, the already selected pattern is retained, and even if the pattern selection switch 2 is operated, no new selection is made.

(Effect) As described above, according to the present invention, the changeover switch 4
When the operating section 5 is operated to the pattern selection side, normal pattern selection is possible, and when necessary, when the operation section 5 is operated to the pattern selection prohibition side, the selection is changed to a new pattern even if the pattern selection switch 2 is operated. Because there is no such thing,
It is safe because there is no fear that the pattern will change even if a child touches the operating section 3 during sewing.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram of the external appearance of a sewing machine showing an embodiment of the present invention, and FIG. 2 is a control block diagram. In the figure, 2 is a pattern selection switch, 4 is a changeover switch, and latch circuit LA is a selection holding device.

Claims (1)

[Scope of utility model registration request] A plurality of operation sections are arranged outside the sewing machine to select each of a plurality of stitch patterns, and when any one of them is operated, the operation section generates a corresponding pattern designation signal to the operation section. and a pattern selection switch that automatically returns to an inactive state when the operation is released, and a pattern selection switch that operates upon receiving the pattern designation signal to select the stitch pattern and selects the stitch pattern until a new pattern designation signal is received. a selection and holding device for holding the pattern selection switch; and an operating section provided outside the sewing machine and having two operating positions, one operating position enables the operation of the selection and holding device by the pattern selection switch and the other operating position enables the selection and holding device to be operated by the pattern selection switch. A pattern selection safety device for a sewing machine comprising a switch for disabling the pattern.