JPH0526080U - Electronic sewing machine bobbin thread monitoring device - Google Patents

Abstract

(57) [Summary] [Purpose] The present invention relates to a bobbin thread monitoring device for an electronic sewing machine, which can detect the remaining amount of the bobbin thread and display that the bobbin thread is insufficient. A measuring device using an optical or contact terminal 22 for monitoring the bobbin thread of an electronic sewing machine, a circuit 24 for detecting a signal from the measuring device, and a display device 25 for warning a shortage of the bobbin thread are provided.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a bobbin thread monitoring device for an electronic sewing machine, which enables the electronic sewing machine to monitor the remaining amount of the bobbin thread of the sewing machine and to display the defect.

[0002]

[Prior Art]

 FIG. 3 is a diagram showing a structure of a lower thread device section of an electronic sewing machine which is widely used, for example. In the figure, 1 is a bobbin in which a bobbin thread of an electronic sewing machine is wound, 2 is a bobbin shaft for supporting the bobbin 1 and a guide for attaching and detaching the bobbin, and 3 is a bobbin box for accommodating the bobbin 1.

Next, the operation will be described. The bobbin 1 housed in the bobbin box 3 has a structure that rotates about the bobbin shaft 2.

[0004]

[Problems to be solved by the device]

 However, conventionally, there is no device for monitoring the bobbin thread, and it is not possible to predict the remaining amount of the bobbin thread.Therefore, it is necessary to interrupt the work and check the remaining amount of the bobbin thread while using the sewing machine. It was.

The present invention has been made to solve the above problems, and provides a lower thread monitoring device for an electronic sewing machine that can detect the remaining amount of the lower thread and display that the lower thread is insufficient. With the goal.

[0006]

[Means for Solving the Problems]

 The bobbin thread monitoring device of the electronic sewing machine according to the present invention is capable of detecting the bobbin thread shortage amount of the electronic sewing machine by using infrared rays or an electrode and displaying a warning of bobbin thread shortage. .

[0007]

[Action]

 The bobbin thread monitoring device according to the present invention is recognized by detecting infrared rays or by energizing the electrodes, and as a result, displays a shortage of the bobbin thread on the display device.

[0008]

【Example】

 Example 1. An embodiment of the present invention will be described below with reference to the drawings. In the mechanical bobbin thread monitoring device shown in FIG. 1, the electrode contact terminal 22 can be moved by sliding the lid 21. Further, when the bobbin thread runs short, the electrode contact terminal 22 comes into contact with the electrode sensor 23 to energize, and the energization detection circuit 24 detects the shortage of the bobbin thread and displays the shortage on the display device 25. FIG. 2 shows that when the infrared ray irradiating device 32 has a shortage of the bobbin thread, the infrared ray controlled by the infrared ray irradiating circuit 31 in the optical bobbin thread monitoring device is detected by the infrared ray detecting circuit 34 when the infrared ray passes through the infrared ray detecting device 33. The shortage of the lower thread is detected and the shortage is displayed on the display device 35.

Next, the operation of this embodiment will be described. The mechanical bobbin thread monitoring device of FIG. 1 will be described. When there is sufficient lower thread, the contact between the electrode contact terminal 22 and the electrode sensor 23 is blocked by the thickness of the lower thread of the bobbin 1 and no current is applied. As the bobbin thread is consumed, the electrode contact terminal 22 approaches the electrode sensor 23, and the electrode contact terminal 22 and the electrode sensor 23 come into contact with each other and energize. In this case, the energization detection circuit 24 detects the energization, and displays a shortage on the display device.

The optical bobbin thread monitoring device of FIG. 2 will be described. When the bobbin thread is sufficient, the infrared ray emitted from the infrared irradiating device 32 hits the bobbin thread due to the thickness of the bobbin 1 and keeps the infrared sensing device 33 from reaching the infrared ray. As the bobbin thread is consumed, infrared rays pass through the infrared sensing device 33, and the infrared sensing device 34 detects the passing of infrared rays and displays a shortage on the display device.

In the above-described embodiment, the case of the lower thread of the electronic sewing machine has been described, but an MT, a cassette tape, an open reel or the like may be used, and the same effect as that of the above-described embodiment is obtained.

[0012]

[Effect of the device]

 As described above, according to the present invention, the thickness of the lower thread is used for detection by the passage of infrared rays, so that there is an effect that the apparatus can be inexpensive and a highly accurate one can be obtained. In addition, the number of components is small and the reliability is improved.

[Brief description of drawings]

FIG. 1 is a sectional side view showing a lower thread monitoring device according to an embodiment of the present invention.

FIG. 2 is a sectional side view showing another embodiment of the present invention.

FIG. 3 is a cross-sectional view showing a conventional bobbin thread device.

[Explanation of symbols]

 1 bobbin 2 bobbin shaft 3 bobbin box 21 lid 22 electrode contact terminal 23 electrode sensor 24 energization detection circuit 25 display device 31 infrared irradiation circuit 32 infrared irradiation device 33 infrared detection device 34 infrared detection circuit 35 display device

Claims (1)

[Scope of utility model registration request] 1. A bobbin thread for an electronic sewing machine comprising a measuring device for monitoring a bobbin thread of an electronic sewing machine by light or a contact terminal and a display device for warning a shortage of the bobbin thread in a circuit for detecting a signal from the measuring device. Monitoring equipment.