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Sewing machine

A sewing machine and motor technology, applied in the field of sewing machines, can solve the problems of component loss, increased power consumption, damage, etc., and achieve the effect of reducing component loss and power consumption

Active Publication Date: 2018-08-17
JUKI CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, in the conventional sewing machine described above, a solenoid is used as a driving source for the lifting operation of the presser foot, so it is difficult to control the height of the presser foot arbitrarily.
In addition, regarding the lifting action of the cloth presser foot realized by the solenoid, the collision between the parts is severe, and there are problems such as easy noise generation, wear and tear of the parts, and damage.
[0006] In addition, when the solenoid is used as the driving source for the lifting operation of the presser foot, it is necessary to continuously supply power to maintain the movement of the presser foot during the lifting of the presser foot. Therefore, there is a problem that the power consumption becomes larger. question

Method used

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Experimental program
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Embodiment Construction

[0071] [Outline of Embodiments of the Invention]

[0072] Next, a sewing machine according to the present invention will be described with reference to the drawings. figure 1 It is a side view showing the arrangement of the overall structure of a sewing machine frame 100 included in the sewing machine and a presser foot lifting mechanism 10 in the sewing machine frame 100 .

[0073]In addition, the sewing machine of this embodiment is a so-called lockstitch sewing machine, and the presser foot lifting mechanism 10 of the sewing machine which is a characteristic part of the present invention will be mainly described. Since the feeding mechanism, kettle mechanism, thread regulator device, balance mechanism, and thread cutting device have the same structure as known structures, description thereof will be omitted.

[0074] In addition, in the following description, the horizontal direction and along the figure 1 The longitudinal direction of the base portion 101 of the illustra...

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Abstract

The invention can adjust the cloth presser foot to any height. The sewing machine comprises a rotary outer peripheral cam (20); a driven body (31) which is abutted against the outer circumference of the outer peripheral cam; a transmission body (32) which transfers the lifting action to the cloth presser foot (11) via rotation from the driven body; a presser foot motor (14) which rotates the outer peripheral cam; and a control device (90) which controls the presser foot motor and controls the lifting action of the cloth presser foot. The height of the cloth presser foot (11) can be arbitrarily adjusted by arbitrarily adjusting the abutting-against position of the driven body with respect to the outer peripheral cam by using the presser foot motor. In addition, since the solenoid is not used, upper and lower movement of the cloth presser foot (11) is carried out by the presser foot motor, so that the noise can be reduced, and the loss and damage of parts caused by the collision can bereduced.

Description

technical field [0001] The present invention relates to a sewing machine having a presser foot lifting mechanism for raising and lowering a cloth presser foot. Background technique [0002] Existing sewing machines are equipped with a presser foot lifting mechanism, and the presser foot lifting mechanism is composed of the following parts: a presser bar, which holds the cloth presser foot; presser foot pressure downward; a lever that applies an upward motion to the presser bar against the presser spring; and a solenoid that applies an upward motion to the rod via a plurality of link bodies. [0003] Furthermore, when the material presser foot is lowered, the solenoid is not driven or the pushing force is minimized, and the material presser foot is moved by the spring pressure of the presser foot spring, and the solenoid is driven when the material presser foot is raised. Instead, a lifting operation is performed (for example, refer to Patent Document 1). [0004] Patent Do...

Claims

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Application Information

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IPC IPC(8): D05B29/02
CPCD05B29/02
Inventor 射越悠
Owner JUKI CORP
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