A dust collection device for a sewing machine

Abstract

The present invention belongs to the field of sewing machine equipment, and provides a dust collection device for a sewing machine, comprising: a dust collection box, a Venturi, a Venturi air volume increaser, and a muffler. The dust collection box is installed on the lower side of the sewing machine table board, and a Venturi air volume increaser is arranged inside the dust collection box. The Venturi air volume increaser includes: a Venturi connection pipe, a waste absorption pipe, and a waste output pipe. The input end of the waste output pipe is connected to the output ends of the Venturi connection pipe and the waste absorption pipe. The port of the Venturi connection pipe protrudes from the dust collection box and is connected to the output end of the Venturi. The waste absorption pipe protrudes from the dust collection box and is connected to the muffler installed outside the dust collection box. The waste output pipe is arranged inside the dust collection box. In the present invention, the Venturi air volume increaser is placed inside the dust collection box, with a simple appearance and convenient installation, further improving the dust collection effect.

Description

Technical Field

[0001] The present invention belongs to the field of sewing machine equipment and relates to a dust collection device for sewing machines. Background Art

[0002] A sewing machine is a machine that uses one or more sewing threads to form one or more types of stitches on the sewing material, so as to interweave or sew together one or more layers of sewing materials. Sewing machines can sew fabrics such as cotton, linen, silk, wool, and artificial fibers, as well as products such as leather, plastic, and paper. The stitches sewn are neat, beautiful, flat and firm, the sewing speed is fast, and it is easy to use. And it has derived artistic forms such as hand embroidery and computer embroidery.

[0003] According to the uses of sewing machines, they can be divided into household sewing machines, industrial sewing machines, and service industry sewing machines between the two; according to the drive mode, they can be divided into hand-cranked, foot-operated, and electric sewing machines; according to the sewn stitches, they can be divided into imitation hand-sewn stitches, lock stitches, single-thread chain stitches, double-thread or multi-thread chain stitches, single-thread or multi-thread overedge chain stitches, and multi-thread cover chain stitch sewing machines.

[0004] The Venturi effect, also known as the Venturi phenomenon, is named after its discoverer, the Italian physicist Venturi. This effect is manifested in that when a restricted flow passes through a reduced cross-section of the flow passage, the fluid shows an increase in flow velocity, and its flow velocity is inversely proportional to the cross-section of the flow passage. And according to Bernoulli's law, the increase in flow velocity is accompanied by a decrease in fluid pressure, that is, the common Venturi phenomenon. Generally speaking, this effect means that a low pressure will be generated near a high-speed flowing fluid, thus generating an adsorption effect. Using this effect, a Venturi tube can be made.

[0005] In the prior art, the Venturi device of the sewing machine is installed outside the dust collection box and placed under the sewing machine table board. The installation is inconvenient, the installation takes a long time, and it is not beautiful; the simple Venturi device has a small air suction flow rate, reducing the dust collection effect. Using the Venturi device will generate relatively large noise, and its shape is complex, not easy to install, and the manufacturing cost is high. Summary of the Invention

[0006] In order to solve the problems in the prior art that the Venturi device of the sewing machine is installed outside the dust collection box and placed under the sewing machine table board, the installation is inconvenient, the installation takes a long time, and it is not beautiful; the simple Venturi device has a small air suction flow rate, reducing the dust collection effect. Using the Venturi device will generate relatively large noise, and its shape is complex, not easy to install, and the manufacturing cost is high, the present invention provides a dust collection device for sewing machines.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] A dust collection device for a sewing machine, comprising: a dust collection box, a Venturi, a Venturi air volume booster, and a muffler. The dust collection box is installed on the lower side of the sewing machine table board, and a Venturi air volume booster is arranged inside the dust collection box;

[0009] The Venturi air volume booster includes: a Venturi connection pipe, a waste absorption pipe, and a waste output pipe. The input end of the waste output pipe is connected to the output ends of the Venturi connection pipe and the waste absorption pipe. The port of the Venturi connection pipe protrudes from the dust collection box and is connected to the output end of the Venturi. The waste absorption pipe protrudes from the dust collection box and is connected to the muffler installed outside the dust collection box. The waste output pipe is arranged inside the dust collection box.

[0010] Preferably, the Venturi includes: a primary Venturi and a secondary Venturi. The input end of the primary Venturi is connected to a compressed air supply pipe. The output end of the primary Venturi is connected to the input end of the secondary Venturi. The output end of the secondary Venturi is connected to the input end of the Venturi connection pipe and the output end of the waste absorption pipe.

[0011] Preferably, the primary Venturi includes: a first connection part and an adjustment part. The first connection part and the adjustment part are of an integral structure. The first connection part is connected to the input end of the secondary Venturi. One end of the adjustment part is connected to the compressed air supply pipe.

[0012] Preferably, an adjustment pin perpendicular to the axis of the internal channel is arranged on the adjustment part.

[0013] Preferably, the primary Venturi further includes: a first channel, a second channel, and a third channel. The input end of the first channel is connected to the compressed air supply pipe. The output end of the first channel is connected to the input end of the second channel. The output end of the second channel is connected to the input end of the third channel. The output end of the third channel is connected to the internal pipe of the secondary Venturi. The aperture of the first channel is larger than that of the third channel. The aperture of the third channel is larger than that of the second channel.

[0014] Preferably, the secondary Venturi includes: a second connection part and a third connection part. The second connection part and the third connection part are of an integral structure. One end of the second connection part is connected to the Venturi connection pipe. The third connection part is connected to the first connection part.

[0015] Preferably, the secondary Venturi further includes a plurality of first guide pipes. One end of each first guide pipe is connected to the internal channel of the third connection part, and the other end of each first guide pipe is connected to the outside.

[0016] Preferably, the secondary Venturi includes: a fourth channel and a fifth channel. The aperture of the fifth channel is smaller than that of the fourth channel. The connection between the fourth channel and the fifth channel is transitioned through a conical inclined plane. The first connection part of the primary Venturi is connected inside the fourth channel. The outlet of the fifth channel is connected to the input end of the Venturi connection pipe and the output end of the waste absorption pipe.

[0017] Preferably, the aperture of the waste input pipe is 42 mm.

[0018] Preferably, the aperture of the first material guide pipe is 14 mm.

[0019] The beneficial effects of the present invention are as follows:

[0020] The present invention places the Venturi air volume increaser in the dust collection box, with a simple appearance and convenient for customers to install;

[0021] The present invention utilizes compressed air. Through the primary Venturi and the secondary Venturi, the primary Venturi sucks in empty thread loops cut by the sewing machine into the first material guide pipe and sends them into the secondary Venturi connected to the Venturi air volume increaser. The Venturi air volume increaser with the waste absorption pipe can also suck in waste such as cut scraps during sewing by the sewing machine into the waste input pipe and send them into the dust collection box.

[0022] The present invention adopts an adjusting pin to control the air volume passing through the primary Venturi, facilitating the adjustment of the subsequent wind speed. Description of the Drawings

[0023] The drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The schematic embodiments and descriptions thereof of the present invention are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0024] Figure 1 is the structural axonometric view of the first angle of the present invention;

[0025] Figure 2 is the bottom view of the present invention;

[0026] Figure 3 is the cross-sectional view of the Venturi of the present invention;

[0027] Figure 4 is the cross-sectional view of the primary Venturi of the present invention;

[0028] Figure 5 is the cross-sectional view of the secondary Venturi of the present invention.

[0029] Explanation of the Reference Numerals in the Drawings:

[0030] 1. Dust collection box; 2. Venturi; 3. Venturi air volume increaser; 4. Muffler; 31. Venturi connection pipe; 32. Waste absorption pipe; 33. Waste output pipe; 21. First-stage Venturi; 22. Second-stage Venturi; 211. First connection part; 212. Adjustment part; 23. Adjustment pin; 213. First channel; 214. Second channel; 215. Third channel; 221. Second connection part; 222. Third connection part; 223. First material guide pipe; 224. Fourth channel; 225. Fifth channel. Detailed implementation mode

[0031] It should be noted that, without conflict, the embodiments in the present invention and the features in the embodiments can be combined with each other.

[0032] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise stated, the meaning of "a plurality" is two or more.

[0033] In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, the terms "installation", "connection", "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood through specific situations.

[0034] The present invention will be described in detail below with reference to the drawings and in combination with the embodiments.

[0035] Example 1, in combination with Figure 1 and Figure 2 is described as follows:

[0036] A dust collection device for a sewing machine, comprising: a dust collection box 1, a Venturi 2, a Venturi air volume booster 3 and a muffler 4. The dust collection box 1 is installed on the lower side of the sewing machine table board, and the Venturi air volume booster 3 is arranged inside the dust collection box 1. The Venturi air volume booster 3 includes: a Venturi connection pipe 31, a waste absorption pipe 32 and a waste output pipe 33. The input end of the waste output pipe 33 is connected to the output ends of the Venturi connection pipe 31 and the waste absorption pipe 32. The port of the Venturi connection pipe 31 protrudes from the dust collection box 1 and is connected to the output end of the Venturi 2. The waste absorption pipe 32 protrudes from the dust collection box 1 and is connected to the muffler 4 installed outside the dust collection box 1. The waste output pipe 33 is arranged inside the dust collection box 1. With such a setting, the Venturi air volume booster 3 is installed inside the dust collection box 1, and the assembled dust collection device is placed under the sewing machine table board, which is convenient for installation, has a short installation working time, and is beautiful and generous. The Venturi air volume booster 3 used in cooperation with the Venturi 2 increases the suction air volume, can improve the dust collection effect. The muffler 4 is added to the waste absorption pipe 32 of the Venturi air volume booster 3 to reduce the noise generated during the operation of the dust collection device. Integrating the dust collection box 1 with the Venturi air volume booster 3 reduces the cost compared with installing the Venturi in the dust collection box 1. When the device is running, first, the compressed air is passed through the Venturi 2 device to amplify the wind speed, so that the waste absorption pipe 32 of the Venturi air volume booster 3 has a dust collection effect. Then, the waste generated by the sewing machine is sucked into the dust collection box 1 through the waste output pipe 33 to collect the waste, reducing the waste pollution around the sewing machine and preventing the sewing machine from stopping due to waste jamming the key components during operation.

[0037] Embodiment 2, on the basis of Embodiment 1, in combination with Figure 3 is described as follows:

[0038] The Venturi 2 includes: a primary Venturi 21 and a secondary Venturi 22. The input end of the primary Venturi 21 is connected to the compressed air supply pipe, the output end of the primary Venturi 21 is connected to the input end of the secondary Venturi 22, and the output end of the secondary Venturi 22 is connected to the input end of the Venturi connection pipe 31 and the output end of the waste absorption pipe 32. With such a setting, the primary Venturi 21 can amplify the wind speed of the compressed air, and the amplified wind speed can continue to be amplified by the secondary Venturi 22, reducing the wind pressure at the output end of the waste absorption pipe 32 and increasing the suction force at the input end of the waste absorption pipe 32, improving the dust collection effect.

[0039] Embodiment 3, on the basis of Embodiment 2, in combination with Figure 4 is described as follows:

[0040] The primary Venturi 21 includes: a first connection part 211 and an adjustment part 212. The first connection part 211 and the adjustment part 212 are of an integral structure. The first connection part 211 is connected to the input end of the secondary Venturi 22, and one end of the adjustment part 212 is connected to the compressed air supply pipeline. With such a setting, a through hole is provided in the center of the adjustment part 212. By rotating the adjustment part 212, the volume of the flowing gas can be changed, thereby controlling the flow rate of the compressed air. The first connection part 211 is sealed and installed inside the secondary Venturi 22, enabling the primary Venturi 21 and the secondary Venturi 22 to communicate with each other.

[0041] Example 4. Based on Example 3, in combination with Figure 4 it is described as follows:

[0042] An adjustment pin 23 perpendicular to the axis of the internal channel is provided on the adjustment part 212. With such a setting, it is convenient for precise adjustment.

[0043] Example 5. Based on Example 4, in combination with Figure 4 and Figure 5 it is described as follows:

[0044] The primary Venturi 21 further includes: a first channel 213, a second channel 214, and a third channel 215. The input end of the first channel 213 is connected to the compressed air supply pipeline, the output end of the first channel 213 is connected to the input end of the second channel 214, the output end of the second channel 214 is connected to the input end of the third channel 215, and the output end of the third channel 215 is connected to the internal pipeline of the secondary Venturi 22. The aperture of the first channel 213 is larger than that of the third channel 215, and the aperture of the third channel 215 is larger than that of the second channel 214. With such a setting, the input end of the first channel 213 is connected to the compressed air supply pipeline, the output end of the first channel 213 is connected to the input end of the second channel 214, the output end of the second channel 214 is connected to the input end of the third channel 215, the output end of the third channel 215 is connected to the internal pipeline of the secondary Venturi 22, the aperture of the first channel 213 is larger than that of the third channel 215, and the aperture of the third channel 215 is larger than that of the second channel 214, which can increase the wind speed flowing through the first channel 213, the second channel 214, and the third channel 215, and improve the subsequent dust collection effect.

[0045] Example 6. Based on Example 5, in combination with Figure 3 and Figure 4 and Figure 5 it is described as follows:

[0046] The secondary Venturi 22 includes: a second connection part 221 and a third connection part 222. The second connection part 221 and the third connection part 222 are of an integral structure. One end of the second connection part 221 is connected to the Venturi connection pipe 31, and the third connection part 222 is connected to the first connection part 211. The secondary Venturi 22 further includes a plurality of first material guide pipes 223. One end of each first material guide pipe 223 is connected to the internal channel of the third connection part 222, and the other end of the first material guide pipe 223 is connected to the outside. Inside the secondary Venturi 22, there are a fourth channel 224 and a fifth channel 225. The aperture of the fifth channel 225 is smaller than that of the fourth channel 224. The connection between the fourth channel 224 and the fifth channel 225 is transitioned through a conical inclined plane. The first connection part 211 of the primary Venturi 21 is connected inside the fourth channel 224. The outlet of the fifth channel 225 is connected to the input end of the Venturi connection pipe 31 and the output end of the waste absorption pipe 32. With such a setting, the cut empty wire loops can be sucked into the Venturi connection pipe 31 through the first material guide pipes 223 and then collected in the dust collection box 1, reducing the pressure on the waste absorption pipe 32 to absorb waste and improving the dust collection effect.

[0047] Embodiment Seven, based on Embodiment Six, is described in combination with Figure 3 as follows:

[0048] The aperture of the waste input pipe 32 is 42 mm, and the aperture of the first material guide pipe 223 is 14 mm. With such a setting, it adapts to the working environment of the sewing machine and conforms to the general waste size.

[0049] The working principle of the present invention:

[0050] A dust collection device for a sewing machine. The dust collection box 1 is installed on the lower side of the sewing machine table board, and a Venturi air volume booster 3 is arranged inside the dust collection box 1. The Venturi air volume booster 3 includes a Venturi connection pipe 31, a waste absorption pipe 32 and a waste output pipe 33. The input end of the waste output pipe 33 is connected to the output ends of the Venturi connection pipe 31 and the waste absorption pipe 32. The port of the Venturi connection pipe 31 protrudes from the dust collection box 1 and is connected to the output end of the Venturi 2. The waste absorption pipe 32 protrudes from the dust collection box 1 and is connected to a muffler 4 installed outside the dust collection box 1. The waste output pipe 33 is arranged inside the dust collection box 1. With such a setting, the Venturi air volume booster 3 is installed inside the dust collection box 1, and the assembled dust collection device is placed under the sewing machine table board, which is convenient for installation, has a short installation working time, and is beautiful and generous. Through the first guide pipe 223, the cut empty wire loops can be sucked into the Venturi connection pipe 31 and then collected into the dust collection box 1, which reduces the pressure on the waste absorption pipe 32 to absorb waste and improves the dust collection effect. The Venturi air volume booster 3 used in cooperation with the Venturi 2 increases the suction air flow and can improve the dust collection effect. A muffler 4 is added to the waste absorption pipe 32 of the Venturi air volume booster 3 to reduce the noise generated during the operation of the dust collection device. Integrating the dust collection box 1 with the Venturi air volume booster 3 reduces the cost compared with installing the Venturi in the dust collection box 1. When the device is operating, first, the compressed air is amplified in wind speed through the Venturi 2 device, so that the waste absorption pipe 32 of the Venturi air volume booster 3 has a dust collection effect. Then, the waste generated by the sewing machine is sucked into the dust collection box 1 through the waste output pipe 33 to collect the waste, reducing the waste pollution around the sewing machine and preventing the sewing machine from stopping due to waste jamming the key components during operation. The appearance of the present invention is simple, the installation is convenient, and the dust collection effect is excellent.

[0051] For those skilled in the art, the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention. Any reference signs in the claims should not be regarded as limiting the claimed rights.

[0052] The above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any minor modifications, equivalent replacements, and improvements made to the above embodiments based on the technical essence of the present invention should be included in the protection scope of the technical solution of the present invention.

Claims

1. A dust collection device for a sewing machine, characterized in that, Comprising: A dust collection box (1), a Venturi (2), a Venturi air volume increaser (3), and a muffler (4). The dust collection box (1) is installed on the lower side of the sewing machine table board, and a Venturi air volume increaser (3) is arranged inside the dust collection box (1); The Venturi air volume increaser (3) includes: a Venturi connection pipe (31), a waste absorption pipe (32), and a waste output pipe (33). The input end of the waste output pipe (33) is connected to the output ends of the Venturi connection pipe (31) and the waste absorption pipe (32). The port of the Venturi connection pipe (31) protrudes from the dust collection box (1) and is connected to the output end of the Venturi (2). The waste absorption pipe (32) protrudes from the dust collection box (1) and is connected to the muffler (4) installed outside the dust collection box (1). The waste output pipe (33) is arranged inside the dust collection box (1); The Venturi (2) includes: a primary Venturi (21) and a secondary Venturi (22). The input end of the primary Venturi (21) is connected to a compressed air supply pipe. The output end of the primary Venturi (21) is connected to the input end of the secondary Venturi (22). The output end of the secondary Venturi (22) is connected to the input end of the Venturi connection pipe (31) and the output end of the waste absorption pipe (32); The primary Venturi (21) includes: a first connection part (211) and an adjustment part (212). The first connection part (211) and the adjustment part (212) are of an integral structure. The first connection part (211) is connected to the input end of the secondary Venturi (22). One end of the adjustment part (212) is connected to the compressed air supply pipe; An adjustment pin (23) perpendicular to the axis of the internal channel is arranged on the adjustment part (212); The primary Venturi (21) further includes: a first channel (213), a second channel (214), and a third channel (215). The input end of the first channel (213) is connected to the compressed air supply pipe. The output end of the first channel (213) is connected to the input end of the second channel (214). The output end of the second channel (214) is connected to the input end of the third channel (215). The output end of the third channel (215) is connected to the internal pipe of the secondary Venturi (22). The aperture of the first channel (213) is larger than that of the third channel (215), and the aperture of the third channel (215) is larger than that of the second channel (214).

2. The dust collection device of a sewing machine according to claim 1, wherein, The secondary Venturi (22) includes: a second connection part (221) and a third connection part (222). The second connection part (221) and the third connection part (222) are of an integral structure. One end of the second connection part (221) is connected to the Venturi connection pipe (31). The third connection part (222) is connected to the first connection part (211); 3. The dust collection device of a sewing machine according to claim 2, characterized in that, The secondary Venturi (22) further includes a first material guiding pipe (223). There are multiple groups of the first material guiding pipes (223). One end of the first material guiding pipe (223) is connected to the internal channel of the third connection part (222), and the other end of the first material guiding pipe (223) is connected to the outside.

4. The dust collection device for a sewing machine according to claim 3, characterized in that, The secondary Venturi (22) includes: a fourth channel (224) and a fifth channel (225). The aperture of the fifth channel (225) is smaller than that of the fourth channel (224). The connection between the fourth channel (224) and the fifth channel (225) is transitioned through a conical inclined plane. A first connection portion (211) of the primary Venturi (21) is connected inside the fourth channel (224). The outlet of the fifth channel (225) is connected to the input end of the Venturi connection pipe (31) and the output end of the waste absorption pipe (32).

5. The dust collection device for a sewing machine according to claim 1, characterized in that, The aperture of the waste absorption pipe (32) is 42 mm.

6. The dust collection device for a sewing machine according to claim 3, wherein The aperture of the first material guide pipe (223) is 14 mm.

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