Sewing machine presser foot with blowing function

Abstract

The utility model belongs to the technical field of industrial sewing machines, and particularly relates to a sewing machine presser foot with an air blowing function. The sewing machine presser foot with the air blowing function comprises a presser foot body, a ventilation channel is formed in the presser foot body, an opening of the ventilation channel is communicated with an installation hole in a presser foot handle, an outlet of the ventilation channel is communicated with a machine needle hole, an air inlet hole and an air inlet channel are further formed in the side wall of the presser foot handle, and the air inlet channel is communicated with the machine needle hole. And the air inlet channel is communicated with the ventilation channel. According to the sewing machine presser foot with the blowing function, the problems that an upper thread is pressed by the presser foot in the sewing starting process, redundant upper thread ends cannot be brought below the sewing material by a machine needle, and consequently the upper thread ends float on the front face of the sewing material are solved, the sewing material is more attractive, and the sewing quality is improved; and in the operation process, an operator does not need to consider the problem of sewing thread ends during sewing, so that the working efficiency is greatly improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of industrial sewing machines, in particular to a sewing machine presser foot with an air blowing function. Background Art

[0002] The presser foot of the existing compound feed single needle lockstitch sewing machine, such as Figure 1 As shown, a needle hole 01A is provided on the foot surface 01 of the L-shaped presser foot, and a mounting hole 02A is provided in the presser foot handle 02 for mounting the presser foot on a single-needle lockstitch machine.

[0003] The presser foot of the single-needle lockstitch sewing machine often presses the upper thread during sewing, and the upper thread floats on the front of the sewing material when sewing, which affects the appearance of the sewing material and the sewing quality. The utility model is designed to solve the problem of the upper thread floating on the front of the sewing material. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model aims to provide a sewing machine presser foot with an air blowing function to solve the technical problem that the presser foot of the existing single-needle lockstitch sewing machine will float on the front side of the sewing material during the sewing process.

[0005] To achieve the above purpose, the solution adopted by the utility model is as follows:

[0006] The utility model provides a sewing machine presser foot with an air blowing function, comprising a presser foot body, the presser foot body comprising a foot surface and a vertically arranged presser foot handle, a machine needle hole is arranged on the foot surface of the presser foot body, and a vertical mounting hole is arranged in the presser foot handle, wherein a ventilation channel is arranged in the presser foot body, the opening of the ventilation channel is communicated with the mounting hole in the presser foot handle, the outlet of the ventilation channel is communicated with the machine needle hole, an air inlet hole and an air inlet channel are also arranged on the side wall of the presser foot handle, and the air inlet channel is communicated with the ventilation channel; compressed gas brought by an external pneumatic control system is blown in through the air inlet hole, passes through the air inlet channel, enters the ventilation channel, and is blown out from the outlet of the ventilation channel.

[0007] Preferably, an air pipe joint is installed at the air inlet hole for connecting with an external pneumatic control system through an air pipe.

[0008] Preferably, the outlet of the ventilation channel is connected to the center position of the needle hole, and the outlet direction of the ventilation channel is toward the needle.

[0009] Preferably, the ventilation channel includes a vertical channel and a horizontal channel; the vertical channel is located in the extension direction of the vertical mounting hole in the presser foot handle toward the foot surface, and the diameter of the vertical channel is smaller than the diameter of the mounting hole.

[0010] Preferably, the outlet of the air inlet channel located on the side wall of the presser foot handle is located on the path of the vertical channel of the ventilation channel.

[0011] Preferably, a blocking piece is provided at the upper part of the vertical channel of the ventilation channel, between the opening of the ventilation channel and the outlet of the air inlet channel on the side wall of the presser foot handle, to ensure that the compressed gas brought by the external pneumatic control system is only blown out from the outlet of the ventilation channel.

[0012] Preferably, the blocking member is a screw, and the screw and the inner wall of the vertical channel of the ventilation channel are sealed by glue.

[0013] Beneficial Effects

[0014] The utility model provides a sewing machine presser foot with an air blowing function, which solves the problem that the upper thread is pressed by the presser foot when starting to sew, and the excess upper thread end cannot be brought under the sewing material by the machine needle, resulting in the upper thread end floating on the front side of the sewing material, thereby making the sewing material more beautiful and improving the sewing quality; and the operator does not need to consider the problem of the sewing thread end when starting to sew during the operation, thereby greatly improving the work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the three-dimensional structure of the presser foot of the existing compound feed single needle lockstitch sewing machine mentioned in the background technology.

[0016] Figure 2 The utility model is a schematic diagram of the three-dimensional structure of the sewing machine presser foot with air blowing function.

[0017] Figure 3 The utility model is a side view of a sewing machine presser foot with an air blowing function at one angle.

[0018] Figure 4 It is a side view from another angle of the sewing machine presser foot with air blowing function involved in the utility model.

[0019] Figure 5 for Figure 3 sectional view of .

[0020] Figure 6 for Figure 4 sectional view of .

[0021] Figure 7 The utility model is a structural schematic diagram of a sewing machine using the sewing machine presser foot with air blowing function of the utility model.

[0022] In the figure,

[0023] 01-Instep,

[0024] 01A-needle hole,

[0025] 02-presser foot handle,

[0026] 02A-Mounting hole,

[0027] 10-Sewing machine presser foot with air blowing function,

[0028] 101-foot,

[0029] 101A-needle hole,

[0030] 102-presser foot handle,

[0031] 102A-Mounting hole,

[0032] 103-needle,

[0033] 11- Ventilation channel,

[0034] 11A-Opening,

[0035] 11B - Exit,

[0036] 12-Intake channel,

[0037] 12A-air inlet,

[0038] 12B-Exit,

[0039] 13-Trachea connector,

[0040] 14- blocking piece,

[0041] 100- Air blowing system for sewing machine presser foot,

[0042] 20-Pneumatic control system,

[0043] 21-pressure regulating valve,

[0044] 30-Connect the air pipe. DETAILED DESCRIPTION

[0045] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0046] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0047] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0048] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the utility model product is usually placed when in use, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0049] In addition, the terms "horizontal", "vertical" and the like do not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0050] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" 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 a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0051] To this end, the following solutions are proposed:

[0052] See also Figure 2The utility model provides a sewing machine presser foot 10 with an air blowing function, including a presser foot body, the presser foot body including a foot surface 101 and a vertically arranged presser foot handle 102, a needle hole 101A is arranged on the foot surface 101 of the presser foot body, a needle 103 is located directly above the needle hole 101A, a vertical mounting hole 102A is arranged in the presser foot handle 102, wherein an air vent 11 is arranged in the presser foot body, an opening 11A of the air vent 11 is communicated with the mounting hole 102A in the presser foot handle 102, an outlet 11B of the air vent 11 is communicated with the center position of the needle hole 101A, an air inlet hole 12A and an air inlet channel 12 are also arranged on the side wall of the presser foot handle 102, and the air inlet channel 12 is communicated with the air vent 11.

[0053] like Figure 7 As shown, in one embodiment of the utility model, there is also provided an air blowing system 100 for a sewing machine presser foot, comprising the sewing machine presser foot 10 as described above, an external pneumatic control system 20 and a connecting air pipe 30 connecting the two, the external pneumatic control system 20 may include a gas producing device (such as a compressor, not shown in the figure), a cylinder (not shown in the figure) and a pressure regulating valve 21 and other devices, and any known pneumatic control system may be used.

[0054] During use, the compressed gas brought by the external pneumatic control system 20 is blown in through the air inlet 12A, passes through the air inlet channel 12, enters the ventilation channel 11, and finally blown out from the outlet 11A of the ventilation channel 11.

[0055] In the sewing machine presser foot 10 with air blowing function provided by the utility model, an air pipe joint 13 is installed at the air inlet 12A for connecting with an external pneumatic control system 20 through a connecting air pipe 30 .

[0056] As an embodiment of the utility model, the outlet 11A of the ventilation channel 11 is connected to the center of the needle hole 101A, and the outlet direction of the ventilation channel 11 is toward the needle 103, so that the surface thread is blown up by air and is blown to the middle of the sole 101 of the presser foot.

[0057] During use, at the end of each sewing operation, after the thread is automatically trimmed and the presser foot is lifted, the pneumatic control system 20 is started (the pneumatic control system controls the blowing time of the presser foot), and the compressed gas generated by the gas generating device passes through the pressure regulating valve 21, the connecting air pipe 30 and other devices, and the air pipe joint 13 on the side of the presser foot 10, and enters the inside of the presser foot 10 from the air inlet hole 12A on the side of the presser foot 10, and enters the air vent 11 in the presser foot body through the air inlet channel 12 on the side wall of the presser foot handle 102, and finally the gas reaches the outlet 11B of the air vent 11, which is located at the center of the needle hole 101A, and blows toward the needle 1 03 direction, thereby blowing up the surface thread attached to the needle 103, ensuring that when the presser foot is pressed down before the next sewing, the surface thread is blown in the middle of the presser foot, so that the surface thread floats without touching the fabric and is not pressed by the presser foot, thereby achieving smooth substitution of the surface thread underneath when sewing begins, solving the problem that the surface thread is pressed by the presser foot at the start of sewing, the excess surface thread head cannot be brought under the sewing material by the needle, causing the surface thread head to float on the front of the sewing material, making the sewing material more beautiful and improving the sewing quality; and the operator no longer needs to consider the problem of the seam thread head at the start of sewing during operation, thereby greatly improving work efficiency.

[0058] like Figure 5 , Figure 6 As shown, in one embodiment of the present invention, the ventilation channel 11 includes a vertical channel 111 and a horizontal channel 112; the vertical channel 111 is located in the extension direction of the vertical mounting hole 102A in the presser foot handle 102 to the foot surface 101, and the diameter of the vertical channel 111 is smaller than the diameter of the mounting hole 102A. In addition, the outlet of the air inlet channel 12 located on the side wall of the presser foot handle 102 is located on the path of the vertical channel 111 of the ventilation channel 11.

[0059] Furthermore, a blocking member 14 is provided at the upper part of the vertical channel 111 of the ventilation channel 11, between the opening of the ventilation channel 11 and the outlet 12B of the air inlet channel 12 on the side wall of the presser foot handle 102, to ensure that the compressed gas brought by the external pneumatic control system 20 is blown out only from the outlet 11B of the ventilation channel 11, thereby ensuring the stability of the gas pressure. In a specific embodiment of the utility model, the blocking member 14 is a screw, and the screw and the inner wall of the vertical channel 111 of the ventilation channel 11 are sealed by glue.

[0060] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A sewing machine presser foot with an air blowing function, comprising a presser foot body, the presser foot body comprising a foot surface and a vertically arranged presser foot handle, a needle hole is arranged on the foot surface of the presser foot body, and a vertical mounting hole is arranged in the presser foot handle, characterized in that: A ventilation channel is arranged in the presser foot body, the opening of the ventilation channel is communicated with the mounting hole in the presser foot handle, the outlet of the ventilation channel is communicated with the needle hole, and an air inlet hole and an air inlet channel are also arranged on the side wall of the presser foot handle, and the air inlet channel is communicated with the ventilation channel; the compressed gas brought by the external pneumatic control system is blown in through the air inlet hole, passes through the air inlet channel, enters the ventilation channel, and is blown out from the outlet of the ventilation channel.

2. The sewing machine presser foot with air blowing function according to claim 1, characterized in that: An air pipe joint is installed at the air inlet for connecting with an external pneumatic control system through an air pipe.

3. The sewing machine presser foot with air blowing function according to claim 1, characterized in that: The outlet of the ventilation channel is communicated with the center position of the needle hole, and the outlet direction of the ventilation channel is toward the needle.

4. The sewing machine presser foot with air blowing function according to claim 1, characterized in that: The ventilation channel includes a vertical channel and a horizontal channel; the vertical channel is located in the extension direction of the vertical mounting hole in the presser foot handle toward the foot surface, and the diameter of the vertical channel is smaller than the diameter of the mounting hole.

5. The sewing machine presser foot with air blowing function according to claim 4, characterized in that: The outlet of the air inlet channel located on the side wall of the presser foot handle is located on the path of the vertical channel of the ventilation channel.

6. The sewing machine presser foot with air blowing function according to claim 5, characterized in that: A blocking piece is provided at the upper part of the vertical channel of the ventilation channel, between the opening of the ventilation channel and the outlet of the air inlet channel on the side wall of the presser foot handle, to ensure that the compressed gas brought by the external pneumatic control system is only blown out from the outlet of the ventilation channel.

7. The sewing machine presser foot with air blowing function according to claim 6, characterized in that: The blocking piece is a screw, and glue is used to seal between the screw and the inner wall of the vertical channel of the ventilation channel.

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