Light source device for detecting the bobbin thread of a sewing machine

Abstract

A light source device for detecting the bottom thread of a sewing machine, comprising a shell, a circuit board, and a lamp bead and a sensor arranged on the circuit board, the shell is provided with a first through hole and a second through hole, the circuit board is installed in the shell as the bottom of the first through hole and the second through hole, the first through hole is provided with a first light transmission cover plate at the front side of the lamp bead, the second through hole is provided with a second light transmission cover plate at the front side of the sensor, the circuit board, the first through hole and the first light transmission cover plate form a first closed space to enclose the lamp bead, the lamp bead emits light outward through the first light transmission cover plate, the circuit board, the second through hole and the second light transmission cover plate form a second closed space to enclose the sensor, and the sensor detects the incident light through the second light transmission cover plate; the light source device is beneficial to the working precision and reliability of the bottom thread detection device.

Description

Technical Field

[0001] This utility model relates to the field of sewing machine technology, and specifically to a light source device for detecting the bottom thread of a sewing machine. Background Technology

[0002] Bottom thread is an important thread required for sewing, and its usage is relatively large. It is of great significance for ensuring sewing quality. Therefore, the requirement for controlling and measuring the bottom thread has been put forward. This application first proposes a bottom thread detection device for sewing machines, realizing a new bottom thread detection technology solution, and the structure is relatively simple.

[0003] The bobbin thread detection device includes a light source and a photosensitive part. The light emitted from the light source shines through a notch onto the photosensitive surface of the bobbin. The reflected light from the photosensitive surface shines through the notch onto the photosensitive part. Each time the bobbin rotates, the photosensitive surface passes through the notch once, and the photosensitive part detects it once. Therefore, how to make the light source and photosensitive part work better restricts the working accuracy and reliability of the bobbin thread detection device. This application proposes a light source device for detecting the bobbin thread of a sewing machine, which is beneficial to the working accuracy and reliability of the bobbin thread detection device. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a light source device for detecting the bottom thread of a sewing machine, which is beneficial to the working accuracy and reliability of the bottom thread detection device.

[0005] The technical solution of this utility model is: a light source device for detecting the bottom thread of a sewing machine, including a housing, a circuit board, and an LED and a sensor disposed on the circuit board. The housing has two mutually isolated through holes, namely a first through hole and a second through hole. The circuit board is installed in the housing as the bottom of the first and second through holes. The LED is located in the first through hole and the sensor is located in the second through hole. A first light-transmitting cover is disposed in front of the LED in the first through hole, and a second light-transmitting cover is disposed in front of the sensor in the second through hole. The circuit board, the first through hole, and the first light-transmitting cover form a first enclosed space to enclose the LED within it. The LED emits light outward through the first light-transmitting cover. The circuit board, the second through hole, and the second light-transmitting cover form a second enclosed space to enclose the sensor within it. The sensor detects the incident light through the second light-transmitting cover.

[0006] With the above structure, this utility model has the following advantages: In this disclosure, the circuit board, the first through hole, and the first light-transmitting cover plate constitute a first enclosed space to enclose the LED bead. The LED bead emits light outward through the first light-transmitting cover plate. The circuit board, the second through hole, and the second light-transmitting cover plate constitute a second enclosed space to enclose the sensor, thereby completely isolating the LED bead and the sensor, i.e., a fully enclosed design, to avoid interference from surrounding light. Since the first through hole and the second through hole are continuously arranged, the possibility of light leakage is basically zero. Therefore, as long as the circuit board, the first light-transmitting cover plate, and the second light-transmitting cover plate are properly installed, good isolation can be achieved, which is beneficial to the working accuracy and reliability of the baseline detection device.

[0007] In addition, the design according to this disclosure makes the structure relatively simple and easy to assemble.

[0008] In addition, due to the good isolation and enclosure, it is less affected by dust in the sewing environment, which is also beneficial to the working accuracy and reliability of the bottom thread detection device.

[0009] In some embodiments, the front side of the housing is provided with a recess at the first through hole and the second through hole and is divided into two parts by a partition, namely a first recess and a second recess. The first recess is fitted with a first light-transmitting cover plate to close the first through hole, and the second recess is fitted with a second light-transmitting cover plate to close the second through hole.

[0010] In some embodiments, the interior of the housing is provided with a plane that fits and mates with the circuit board at the first through hole and the second through hole.

[0011] In some embodiments, the first through hole is configured in the shape of a horn on the side that mates with the lamp bead.

[0012] In some embodiments, the first through hole is configured as a rectangular hole, and the three sides of the side that mates with the lamp bead are configured as three bevels, while the side separating the first through hole and the second through hole is a vertical surface.

[0013] In some embodiments, a rear cover is also included, which is connected to the housing to enclose the circuit board therein. Attached Figure Description

[0014] Figure 1 This is a three-dimensional schematic diagram of a light source device for detecting the bottom thread of a sewing machine.

[0015] Figure 2 This is a three-dimensional schematic diagram of a light source device for detecting the bottom thread of a sewing machine after removing the first and second light-transmitting covers.

[0016] Figure 3 This is a three-dimensional schematic diagram of a light source device for detecting the bottom thread of a sewing machine after removing the housing.

[0017] Figure 4 This is a three-dimensional schematic diagram of the interior of a housing disclosed herein.

[0018] Figure 5 This is a front view of the interior of a housing disclosed herein.

[0019] Figure 6 This is a schematic diagram of a sectional view along line AA.

[0020] The figure shows: 1-housing, 2-circuit board, 3-LED bead, 4-sensor, 5-first through hole, 6-second through hole, 7-first light-transmitting cover, 8-second light-transmitting cover, 9-partition, 10-first recess, 11-second recess, 12-plane, 13-sloping surface, 14-back cover. Detailed Implementation

[0021] To better understand this application, various aspects of this application will be described in more detail below with reference to the accompanying drawings. It should be understood that these detailed descriptions are merely illustrative of exemplary embodiments of this application and are not intended to limit the scope of this application in any way. Throughout the specification, the same reference numerals refer to the same elements.

[0022] like Figures 1 to 6 As shown, this disclosure proposes a light source device for detecting the bottom thread of a sewing machine, including a housing 1, a circuit board 2, and an LED 3 and a sensor 4 disposed on the circuit board 2. The housing 1 has two mutually isolated through holes, namely a first through hole 5 and a second through hole 6. The circuit board 2 is installed in the housing 1 as the bottom of the first through hole 5 and the second through hole 6. The LED 3 is located in the first through hole 5 and the sensor 4 is located in the second through hole 6. A first light-transmitting cover plate 7 is disposed in front of the LED 3 in the first through hole 5, and a second light-transmitting cover plate 8 is disposed in front of the sensor 4 in the second through hole 6. The circuit board 2, the first through hole 5, and the first light-transmitting cover plate 7 form a first enclosed space to enclose the LED 3 therein. The LED 3 emits light outward through the first light-transmitting cover plate 7. The circuit board 2, the second through hole 6, and the second light-transmitting cover plate 8 form a second enclosed space to enclose the sensor 4 therein. The sensor 4 detects the incident light through the second light-transmitting cover plate 8.

[0023] One could consider using injection molding to integrally mold the housing 1, and then install the circuit board 2, the first light-transmitting cover 7, and the second light-transmitting cover 8 onto the housing 1, thus easily completing the installation.

[0024] In some embodiments, such as Figure 2As shown, the front side of the housing 1 has recesses at the first through hole 5 and the second through hole 6, and is divided into two parts by a partition 9, namely a first recess 10 and a second recess 11. The first recess 10 is fitted with a first light-transmitting cover plate 7 to close the first through hole 5, and the second recess 11 is fitted with a second light-transmitting cover plate 8 to close the second through hole 6. In this way, the first light-transmitting cover plate 7 and the second light-transmitting cover plate 8 can be installed more easily, which is beneficial to the accurate installation position.

[0025] In this example, both the first recess 10 and the second recess 11 are rectangular, as are the first light-transmitting cover plate 7 and the second light-transmitting cover plate 8.

[0026] In some embodiments, such as Figure 4 As shown, the interior of the housing 1 has a flat surface 12 at the first through hole 5 and the second through hole 6 that fits and mates with the circuit board 2. This facilitates the installation of the circuit board 2, for example, by fixing the circuit board 2 inside the housing 1 with screws, while ensuring that the circuit board 2 fits snugly against the flat surface 12.

[0027] In particular, such as Figure 4 , 5 As shown in Figures 6 and 7, the first through hole 5 is shaped like a trumpet on the side that mates with the LED bead 3. This helps to create a focusing effect, thereby emitting light more effectively.

[0028] Furthermore, the first through hole 5 is designed as a rectangular hole, and three sides on the side that mates with the LED bead 3 are designed as three bevels 13, while the side separating the first through hole 5 and the second through hole 6 is a vertical surface. This facilitates manufacturing and is beneficial for injection molding.

[0029] In some embodiments, such as Figure 1 , 2 As shown in Figure 3, it also includes a rear cover 14, which is connected to the housing 1 to enclose the circuit board 2 therein. This provides a better sealed state and helps protect the circuit board 2.

[0030] When understanding this utility model, the above structure may be referred to other embodiments / appendices if necessary. Figure 1 And that is understood, so I will not elaborate further here.

[0031] The above description is merely an illustrative embodiment of this utility model. Therefore, all equivalent changes or modifications made to the structure, features, and principles described in the scope of protection of this utility model are included within the scope of protection of this utility model.

Claims

1. A light source device for detecting the thread of a sewing machine, characterized in that, The device includes a housing (1), a circuit board (2), and an LED (3) and a sensor (4) mounted on the circuit board (2). The housing (1) has two mutually isolated through holes, namely a first through hole (5) and a second through hole (6). The circuit board (2) is installed in the housing (1) as the bottom of the first through hole (5) and the second through hole (6). The LED (3) is located in the first through hole (5) and the sensor (4) is located in the second through hole (6). A first light-transmitting cover plate (7) is provided on the front side of the LED (3) in the first through hole (5), and a second light-transmitting cover plate (8) is provided on the front side of the sensor (4) in the second through hole (6). The circuit board (2), the first through hole (5), and the first light-transmitting cover plate (7) constitute a first closed space to enclose the LED (3) within it. The LED (3) emits light outward through the first light-transmitting cover plate (7). The circuit board (2), the second through hole (6), and the second light-transmitting cover plate (8) form a second enclosed space to enclose the sensor (4). The sensor (4) detects the incoming light through the second light-transmitting cover plate (8).

2. The light source device for detecting the thread of a sewing machine according to claim 1, characterized in that, The front side of the housing (1) is provided with a recess at the first through hole (5) and the second through hole (6) and is divided into two parts by a partition part (9), namely a first recess (10) and a second recess (11). The first recess (10) is fitted with a first light-transmitting cover plate (7) to close the first through hole (5), and the second recess (11) is fitted with a second light-transmitting cover plate (8) to close the second through hole (6).

3. A light source device for detecting the thread of a sewing machine according to claim 1 or 2, characterized in that, The interior of the housing (1) has a flat surface (12) that fits and engages with the circuit board (2) at the first through hole (5) and the second through hole (6).

4. A light source device for detecting the thread of a sewing machine according to claim 1, characterized in that, The first through hole (5) is shaped like a horn on the side that is fitted with the lamp bead (3).

5. A light source device for detecting the thread of a sewing machine according to claim 4, characterized in that, The first through hole (5) is set as a rectangular hole, and the three sides of the side that fits with the lamp bead (3) are set as three bevels (13), while the side at the separation between the first through hole (5) and the second through hole (6) is a vertical surface.

6. A light source device for detecting the thread of a sewing machine according to claim 1, characterized in that, It also includes a back cover (14), which is connected to the housing (1) to enclose the circuit board (2) therein.

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