Sewing – Stitch forming – Zigzag
Patent
1993-09-14
1994-11-08
Nerbun, Peter
Sewing
Stitch forming
Zigzag
112458, D05B 302
Patent
active
053617142
DESCRIPTION:
BRIEF SUMMARY
FIELD OF INVENTION
The present invention pertains to a sewing machine which has a display unit for displaying the different patterns to be sewed and a keyboard for selecting the patterns. In particular the present invention also displays the parameters for a particular pattern after that particular pattern has been selected.
BACKGROUND OF THE INVENTION
In a prior-art sewing machine (U.S. Pat. No. 4,499,836), a plurality of differently preprogrammed sewing patterns can be prepared. These sewing patterns are selected from a table, in which the sewing patterns are represented together with a corresponding code number, which latter is entered via a keyboard to select the pattern. This alone requires a fairly great effort for finding the sewing pattern. To determine the different sewing parameters of the sewing pattern selected, it is necessary to subsequently enter the sewing parameter values via additional keys associated with the individual parameter displays. This is very confusing for the operator, and usually requires repeated looking in the operating manual of the sewing machine.
A sewing machine having an electronic display unit has become known from U.S. Pat. No. A-4,860,678. The display unit of this sewing machine shows, at the same time, an excessively large number of display fores, from which the operator can make a selection by means of a key-controlled cursor. The simultaneous presentation of such a large number of possible selections is confusing for the operator and therefore makes it difficult to operate the sewing machine.
U.S. Pat. No. A-4,622,907 discloses a sewing machine with which a plurality of letters and letter combinations can be prepared. A separate key of a keypad is associated with each letter that can be prepared, and this key shows a sewing pattern symbol corresponding to the associated letter. Even though such a device may be suitable for selecting patterns that are intended to represent letters, selecting individual sewing patterns or groups of sewing patterns of similar shape or their setting parameters would require a confusingly and great operating effort.
SUMMARY AND OBJECTS OF THE INVENTION
To eliminate these disadvantages, the basic task of the present invention is to provide a selection and display device for pattern selection in an electronic sewing machine with which both the pattern selection and the parameter setting of the selected sewing pattern can be performed consecutively without problems.
The solution according to the present invention, leads to a pattern selection and display device which is easy to operate and has a compact design despite the substantially enlarged sewing pattern and parameter display.
BRIEF DESCRIPTION OF THE DRAWINGS
FIGS. 1 through 7 show one embodiment of the present invention:
FIG. 1 shows the front view of a sewing machine with the arm cover folded out,
FIG. 2 shows the drive of the stitch position and feed control unit of the sewing machine,
FIG. 3 shows a block diagram of the control system of the sewing machine,
FIGS. 4-6 show different display forms of the display unit installed in the am cover of the sewing machine, and
FIG. 7 shows a representation for explanation of the contents of the working memory.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
As is shown in FIG. 2, the sewing machine is equipped with a main shaft 1, which causes a needle bar 6, which is provided with a needle 4 and is mounted in a rocker guide 5, to perform vertical lifting movements via a crank 2 and a connecting rod 3. The guide rocker 5 is mounted in the housing of the sewing machine shown in FIG. 1 by means of a pin 7.
The guide rocker 5 has a projection 8, which is connected via a connecting rod 9 to a crank 10, which is fastened to a shaft 11 of a stepping motor 12 arranged in the housing of the sewing machine to control the stitch positions of the needle 4.
Via a chain (not shown), the main shaft 1 drives a lower shaft 13. A gear 14, which engages a gear 15 that is fastened to a shaft 16 mounted in parallel to the shaft 13, is fastene
REFERENCES:
patent: 4499836 (1985-02-01), Meier
patent: 4577574 (1986-03-01), Takahashi
patent: 4622907 (1986-11-01), Kimura
patent: 4648341 (1987-03-01), Kato et al.
patent: 4860678 (1989-08-01), Skogward
patent: 5097779 (1992-03-01), Ishikawa et al.
Nerbun Peter
Pfaff Haushaltmaschinen GmbH
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