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Sewing machines

A sewing machine and generator technology, applied in sewing machine components, sewing machines, sewing machine control devices, etc., can solve the problems of large battery power consumption, complex structure, power consumption, etc., and achieve accurate maintenance period, small size and low price. Effect

Inactive Publication Date: 2011-02-09
BROTHER KOGYO KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, the problem with this sewing machine with solar cells is that when sewing, sunlight or a light source instead of sunlight is necessary, and the installation position of the sewing machine is limited.
[0008] A storage battery (primary battery) can also be used as the power source of the CPU used to calculate the accumulated operating time, but the battery consumes a lot of power and has a short lifespan due to the need to continuously consume power to save the stored data.
In addition, in order to calculate the operating time, it is necessary to provide a rotation detection device such as an encoder or a rotation sensor that detects the rotation of the main shaft of the sewing machine. Therefore, the structure is more complicated, and expensive parts are added, resulting in an increase in cost.

Method used

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Examples

Experimental program
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Embodiment

[0038] Below, refer to the attached Figures 1 to 6 A first embodiment of the present invention will be described.

[0039] figure 1 The overall structure of the sewing machine 1 of this embodiment is shown. Described sewing machine 1 is provided with horizontal base 3, and the pin post 4 erected upwards from this base 3 right end, and the arm portion 5 that extends leftward from this pin post 4 upper end, and is placed on the operating table 2.

[0040] An unillustrated thread wheel catcher is provided in the base 2, and a thread gripper 6 is provided in the front portion of the arm portion 5. Inside the arm portion 5, a sewing machine main shaft 8 (only in the figure 2 shown in ). In addition, a needle bar drive mechanism and a thread take-up drive mechanism (not shown) are provided inside the arm portion 5 .

[0041] The above-mentioned needle bar drive mechanism is used to convert the rotational drive of the sewing machine main shaft 8 into the vertical drive of the ne...

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PUM

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Abstract

The invention provides a sewing machine. A sewing machine main shaft (8) is arranged in an arm portion (5) and driven by a sewing machine motor, an electric generator (15) composed of a PM type stepping motor is arranged on the main shaft in an external embedded mode, a DC supply voltage control circuit is provided for converting electric power into assigned voltage (such as 5V), through working of the power supply, the accumulated running time T of the sewing machine 1 is calculated and a maintaining CPU (26) for prompting maintenance time (packing lubrication) is provided.

Description

technical field [0001] The present invention relates to a sewing machine in which a rotary shaft is rotationally driven or a drive shaft is reciprocally driven by a sewing machine motor. Background technique [0002] Conventionally, in a sewing machine provided with a sewing mechanism including a needle bar, a thread hooking shuttle, etc., a commercial AC power supply is used as a driving power source for a sewing machine motor that drives the sewing mechanism. In addition, in an electronically controlled sewing machine provided with a control device including a CPU, in order to obtain a power source for driving the control device, a power source that converts the above-mentioned commercial power supply (for example, 100V alternating current) into a low-voltage direct current (for example, 5V direct current) is provided. device. [0003] However, there are various voltages (such as 100V, 200V, etc.) or methods (single-phase, three-phase) of commercial power supplies in some...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D05B69/00H02K37/14D05B69/10H02P9/00
Inventor 山下正行堀部美彦成本荣基
Owner BROTHER KOGYO KK