JPH03280989A - motor for 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 [Field of Industrial Application] The present invention relates to a sewing machine driving mode, and more particularly to driving a sewing machine pulley.

[Conventional technology]

As described in the Hitachi Electromighty Stop service manual, the conventional device used a ``position detector'' to control the position of the sewing machine needle.

[Problem to be solved by the invention]

The position detector required in the above-mentioned conventional technology has problems such as problems caused by installation by the customer, noise caused by the cord that transmits the signal crawling from the sewing machine pulley to the controller, and nuisance for the operator. There was no consideration given.

The present invention fixes the positional relationship between the motor rotor and the sewing machine pulley using a timing belt, improves the control method, eliminates the need for a position detector, and provides a sewing machine motor that solves the above problems. .

[Means to solve the problem]

In order to achieve the above object, the means for transmitting power from the motor to the sewing machine pulley uses a timing belt or the like to fix the positional relationship between the motor rotor, the sewing machine pulley, and even the sewing machine needle. Then, the position of the sewing machine needle is controlled by improving the control method and controlling the position of the rotor of the motor.

[Effect]

The timing belt fixes the positional relationship between the motor rotor and the sewing machine pulley, and by controlling the position of the motor rotor, it becomes possible to control the position of the sewing machine needle.

〔Example〕

An embodiment of the present invention will be described below with reference to FIG. 1 is a moder, and a timing belt pulley 2a is attached to the output shaft. This pulley 2a and sewing machine pulley 4a
and are connected via a timing belt 3a.

6a is a controller that controls the rotation of the moder.

When the moder 1 is rotated by the controller 6a, power is transmitted to the pulley 2a, timing belt 3a, and sewing machine pulley 4a, and the amount of movement (rotation speed) of each is also constantly controlled by the controller 6a. Therefore, it is also possible to control the position of the sewing machine needle.

FIG. 2 shows a conventional device, where 2 and 4 are pulleys for V-belts, and 3 is a belt. 7 is a position detector for detecting the position of the sewing machine needle. In the conventional device, since there is no rotational positional relationship between the moder 1 and the sewing machine 5, it is necessary to use the position detector 7 to detect the position of the sewing machine needle.

According to this embodiment, by using a timing belt and its pulleys and improving the control method using a microcomputer, etc., it is possible to eliminate the conventional position detector and create an inexpensive and highly reliable sewing machine model. Can be provided.

〔Effect of the invention〕

According to the present invention, it is possible to eliminate the position detector, and an inexpensive and highly reliable sewing machine model can be provided.

[Brief explanation of drawings]

FIG. 1 is an overall configuration diagram of an embodiment of the present invention, and FIG. 2 is an overall configuration diagram of a conventional product.

Claims (1)

[Claims] 1. In a sewing machine equipped with a sewing machine, a sewing machine motor, and a controller to control the same, power is transmitted between the motor and the sewing machine pulley using a timing belt, etc., and the position of the sewing machine needle is controlled without using a position detector, etc. A sewing machine motor characterized in that the rotor of the motor is directly controlled by the controller body.