JPS5894890A - Electromotive sewing machine - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electric sewing machine, and more particularly to an electric sewing machine in which driving force for a sewing machine shaft for reciprocating a sewing needle is obtained from an electric motor.

Generally, an electric sewing machine includes a sewing machine shaft 12 for reciprocating the sewing machine needle 28 and a sewing machine frame 10 that pivotally supports the sewing machine shaft 12, as shown in conventional examples in FIGS. 1, 2, and 3. The sewing machine has a sewing machine mechanism and an electric motor M for obtaining driving force for the sewing machine mechanism. and,
For example, in the conventional example shown in FIG.
The rotational output obtained from 0 is transmitted to the electric motor Zori 24 (
It is applied to the upper shaft 12 of the sewing machine via the bolt 26 and the sewing machine pulley 14. The conventional example shown in FIGS. 2a and 2b is similar, but the electric motor M in this case is
incorporated within. In addition, in the conventional example shown in FIG.
It is directly connected to 2.

However, in any case, in the conventional electric sewing machine, the sewing machine mechanism and the electric motor M are separate from each other, and the electric motor M is independent by the electric motor frame 16, the electric motor stator 18, the electric motor shaft 20, and the electric motor stator 22. This is composed of the above-mentioned Zori 24.14 and belt 26.
Alternatively, it was configured to be connected to a sewing machine mechanism section via a joint 30. Since the sewing machine mechanism section and the electric motor M have independent configurations, a means for connecting the sewing machine mechanism section and the electric motor M, that is, the above-mentioned Zori 2
4.14, the belt 26, the joint 30, etc. are indispensable, and this has been a major limitation in simplifying the configuration and reducing the cost of this type of electric sewing machine. Further, configuring the sewing machine mechanism and the electric motor M separately is not necessarily rational in terms of simplifying the configuration, making the electric sewing machine more compact, or reducing the cost.

This invention was made in view of the above-mentioned conventional problems, and its purpose is to reduce the number of parts such as pulleys, belts, and joints that are essential for connecting the sewing machine mechanism and the electric motor, and to An object of the present invention is to provide an electric sewing machine in which the configurations of a mechanism part and an electric motor can be significantly simplified and cost reduced.

To achieve the above object, the present invention provides an electric sewing machine comprising a sewing machine shaft for reciprocating a sewing machine needle, a frame for pivotally supporting the sewing machine shaft, and an electric motor for driving the sewing machine shaft. , the rotor of the electric motor is mounted on the sewing machine shaft, and the stator of the electric motor is mounted on the frame.

Hereinafter, preferred embodiments of the present invention will be described based on the drawings.

FIG. 4 shows an embodiment of an electric sewing machine according to the present invention.

The electric sewing machine shown in the figure has a sewing machine mechanism section including a sewing machine upper shaft 12 for reciprocating a sewing machine needle 28 and a sewing machine frame 10 that pivotally supports the upper shaft 12, and an electric motor M. M does not have a separate motor frame and motor shaft. That is, here:
The upper shaft 12 of the sewing machine also serves as the motor shaft, and the sewing machine frame 10 directly constitutes the motor frame. For this purpose, the motor rotor 22 is connected to the upper shaft 1 of the sewing machine.
The motor stator 22 is directly attached to the sewing machine frame 10 and held by the frame 10. Although the motor stator 18 and the motor rotor 22 are mounted within the sewing machine frame 10 in the illustrated embodiment, they may be mounted outside the sewing machine frame 10 in other embodiments.
[OK sewing machine upper shaft 12 may be extended and positioned at this extended portion.] Additionally, in the illustrated embodiment,
Although the electric motor rotor 22 is attached to the sewing machine upper shaft 12, in a sewing machine having a sewing machine support shaft, the electric motor rotor 22 may be attached to this sewing machine support shaft.

Further, in the illustrated embodiment, the motor stator 18 and the motor rotor 22 constitute a rust-conducting motor. However, other types of electric motors may be used as long as they have a stator and a rotor and are suitable for driving a sewing machine, such as a DC motor or a Nocellus motor.

As described above, in the electric sewing machine of the present invention, the electric motor for providing drive to the sewing machine mechanism section is integrated with the sewing machine mechanism section, and thereby the pulley, belt, or joint for connecting the sewing machine mechanism section and the electric motor is integrated. This eliminates the need for other parts, and the configuration of the motor itself is also greatly simplified.
As a result, the cost of materials, manufacturing, etc. can be reduced, and the structure can be simple and compact.

[Brief explanation of the drawing]

Figures 1, 2, and 3 are schematic front views showing an example of a conventional electric sewing machine, Figure 2 is a schematic side view of Figure 2a, and Figure 4 is an embodiment of the electric sewing machine according to the present invention. FIG. In the drawings, the same members are designated by the same reference numerals; 10 is the sewing machine frame, 12 is the upper shaft of the sewing machine, 18 is the motor stator, 22 is the motor rotor, 28 is the sewing machine needle, and M is the motor. Agent Patent Attorney Makoto Kuzuno - 1 (1 other person) Figure 1 Figure 2 (a) (b) 0 Figure 3 Figure 4 Procedural amendment (1 letter) Mr. Commissioner of the Japan Patent Office 1 Case (') Display THA 1986-19 m
848 No. 2, Name of the invention Electric ζ-shin 3, Relationship with the case of the person making the amendment Patent applicant address 2-2-3 Marunouchi, Chiyoda-ku, Tokyo Name (601) Jinhachi Katayama, Representative of Mitsubishi Electric Corporation Part 4, Agent Address: Mitsubishi Electric Corporation, 2-2-3 Marunouchi, Chiyoda-ku, Tokyo 5, Detailed Description of the Invention in the Specification Subject to Amendment, Column 6, Description of the Amendment as follows: do.

Claims (1)

[Claims] (1) In an electric sewing machine comprising a sewing machine shaft for reciprocating a sewing machine needle, a frame for pivotally supporting the sewing machine shaft, and an electric motor for driving the sewing machine shaft, the rotor of the electric motor is connected to the sewing machine shaft. An electric sewing machine characterized in that the stator of the electric motor is attached to the frame.