JPH019511Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Description of the Technical Field) The present invention relates to an operating device for a sewing machine having a push button type start or stop switch.

(Description of Prior Art) Conventionally, this type of sewing machine is provided with a push-button type start switch (hereinafter simply referred to as a "start switch") for starting the sewing machine and a reverse stitch switch for performing reverse stitches. Since the start switch and reverse stitch switch are frequently operated by the operator during sewing, they need to be placed in a location where they can be easily operated.

For this reason, in conventional sewing machines, a start switch is disposed in the arm jaw near the needle base, so that the operator can operate the start switch while holding the workpiece with both hands. However, since the area of the arm jaw portion is narrow, the reverse stitch switch cannot be placed near the needle base, but is placed at a distance from the needle base. For this reason, when backstitching, it is necessary to take one's hand away from the sewn product and operate the backstitch switch, which has disadvantages such as crooked sewing lines and a delay in switch operation, making it impossible to perform backstitching accurately.

There are also sewing machines in which a start switch and a reverse stitch switch are arranged in the arm jaw near the needle base. However, as mentioned above, since the area of the arm jaw portion is narrow, it is necessary to make the shapes of both switches extremely small. For this reason, there are drawbacks such as the operator frequently operating both switches during sewing and accidentally pressing the switches at the same time, and the operator having to select both switches each time as necessary, making the operation complicated.

(Purpose of the present invention) The present invention improves this point by making it possible to integrally form the start or stop switch and the reverse stitching switch, and to form the shape of the switch to be large enough to be operated. To provide an operating device for a sewing machine which can perform a switch operation, can arrange the switch near the needle head, can make the switch operation extremely easy, and can prevent errors in the switch operation.

(Outline of the present invention) The present invention integrates a start or stop switch and a reverse stitch switch to form one switch, reduces the installation area of the switch, places the switch near the needle base, and has a shape of the switch. is characterized by being formed to a size sufficient for operation.

(Explanation based on an embodiment) An embodiment of the present invention will be described based on the drawings.
FIG. 1 is a perspective view showing the appearance of an embodiment of the present invention. That is, a switch 5 which integrates a start or stop switch and a reverse stitch switch, which are the features of the present invention, is installed in the arm jaw part 3 of the sewing machine 1 near the needle 2.
Place. An arrow 6 indicating a start or stop switch function and an arrow 7 indicating a reverse stitch switch function are displayed on the surface of the switch 5, respectively.

FIG. 2 shows an enlarged sectional view of the main parts of the switch 5, which is a feature of the present invention.

In FIG. 2, numeral 10 indicates a switch mounting board on which a micro switch is mounted. On this switch mounting board 10 is a micro switch 1 for starting and stopping.
2 and the micro switch 13 for reverse stitching are attached. Here, once the micro switch 12 is turned on, it remains ON or ON until it is turned on again.
The circuit is latched to maintain the OFF state.
Micro switch 13 only operates during the period in which it is switched.
The circuit is configured to be in the ON state.

In addition, 15 in FIG. 2 indicates a switch cover formed in an arcuate shape, the above-mentioned arrows 6 and 7 are displayed on the surface of the switch cover, and the above-mentioned micro switch 12 is displayed inside.
Projections 16 and 17 are formed opposite to and 13, respectively. This switch cover 1
5 and the microswitches 12 and 13, and the switch cover 15 is normally held in a horizontal position (neutral position).
An elastic part 20 is provided with its base fixed to the switch base material 22 to provide a minute gap between the microswitches 17 and the microswitches 12 and 13 and turn the switches OFF. Further, the switch cover 15 is formed to have a size sufficient for operation and is supported by a loose fit on a support shaft 18 that passes through the elastic portion 20. Further, the mounting board 10 and the micro switches 12 and 13 are each integrally attached to a switch base material 22 and fixed to a sewing machine frame 25 with screws 23 and 24.

The characteristic operation of an embodiment of the present invention constructed as described above will be explained. The switch 5 is always in the OFF state, and the operator presses the sewn product onto the sewing machine with the presser foot and fixes the sewn product with both hands. In this state, the switch 5 is lightly pressed down with the index finger of the right hand in the direction of the arrow 6 indicating the activation switch function. As a result, the protrusion 16 presses down the micro switch 12, and the drive circuit is activated to start the sewing machine. When the index finger is released from the switch 5, the switch cover 15 is held in a horizontal position by the elastic portion 20, but the micro switch 12 is electrically latched and sewing continues.
To stop the sewing machine, the switch 5 may be pushed down again in the direction of the arrow 6 in the same manner as described above.

To perform further reverse stitching while the sewing machine is running, press down on the arrow 7 side of the switch 5 lightly with the index finger of the right hand while holding the sewn product with both hands. As a result, the protrusion 17 presses down the micro switch 13, and the sewing machine enters the reverse sewing mode, and reverse sewing is performed while the switch 5 is pressed down toward the arrow 7 side. As described above, in the sewing machine of the present invention, the switch can be operated with one index finger, and since only one switch is required, the shape of the switch is formed to be large enough for operation.

(Explanation of Effects) As explained above, according to the present invention, the start or stop switch and the reverse stitch switch are integrated.
It is formed in each operation switch. Therefore, the shape of the switch can be made large enough for operation, and since only one switch is required, the switch can be placed near the needle base. For this reason,
The switch can be easily operated with one finger, and there is no risk of pressing the wrong switch, which has excellent effects such as significantly improving the functionality of the sewing machine.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing the appearance of an embodiment of the present invention.
Figure 2 is an enlarged cross-sectional view of the main parts of the switch. 5... Switch, 12, 13... Micro switch, 15... Switch cover, 16, 17...
Projection part, 20...Elastic part.

Claims (1)

[Claims for Utility Model Registration] 1. A switch cover in which downwardly protruding protrusions are formed near both ends of the inner surface, and is rotatably and elastically held around a support shaft, and one of the protrusions. A switch including a micro-switch for starting or stopping the sewing machine, which is provided opposite to the sewing machine, and a micro-switch for reverse stitching, which is provided opposite to the other one of the protrusions, is connected to the sewing machine near the needle base. Sewing machine operating device located on the machine frame. 2. The operating device for a sewing machine according to claim 1, wherein the micro-switches are fixed on the same base material.