Swing needle mechanism of button sewing machine

Abstract

The utility model provides a needle swinging mechanism of a button sewing machine, which comprises a machine needle and a power source, the power source drives the machine needle to swing through a linkage piece, the linkage piece comprises a swinging frame and a mounting block, the swinging frame is transversely arranged in a machine shell, the mounting block is hinged in the machine shell through a rotating shaft, one end of the swinging frame is connected with the mounting block, and the other end of the swinging frame is connected with the rotating shaft. A needle rod movably penetrates through the other end of the swing frame, the needle rod is perpendicular to the swing frame and parallel to the rotating shaft and is vertically arranged, the machine needle is vertically installed at the bottom of the needle rod, the power source drives the swing frame to swing with the rotating shaft as the center, and the needle rod and the machine needle synchronously swing along with the swing frame. Compared with the prior art, the needle in the needle swinging mechanism of the button sewing machine is always in the vertical state, the needle can be always aligned with a button hole in a button when vertically moving downwards for sewing, the accuracy is high, interference between the needle and the button is avoided, needle collision is avoided, the service life of the needle is guaranteed, loss of the needle and the button is reduced, and the button sewing success rate is guaranteed.

Description

Technical Field

[0001] The utility model belongs to the technical field of button sewing machines and relates to a needle swinging mechanism of a button sewing machine. Background Art

[0002] A button sewing machine, also known as a button sewing industrial sewing machine, is capable of automatically sewing various forms and sizes of buttons, press buttons, buckles, labels, and paired products such as socks and gloves. As described in the Chinese patent number "02121687.8" for the winding foot button sewing machine, the specific structure of this button sewing machine is as follows: it includes a needle up-and-down driving device that drives the needle bar up and down using a spindle arranged slightly horizontally. A sewing needle is installed at the lower end of the needle bar, and a needle swing driving device that swings the needle bar in a plane parallel or perpendicular to the longitudinal direction of the spindle. In the needle swing mechanism, once the needle swing motor operates, the rotation is transmitted to the needle bar rocking lever through the first connecting rod, the second connecting rod, and the third connecting rod, and reciprocally swings. This swing is transmitted to the needle bar rocking table through the rocking slider, and the needle bar rocking table swings the needle bar in the X direction with the fulcrum pin as the center. Thus, the sewing needle performs a needle swing. In the above structure, it is equivalent to the needle bar rocking table rotating and swinging with the fulcrum pin as the center. When the sewing needle is driven to perform a needle swing, it is in an inclined state. When the sewing needle moves down into the buttonhole on the button, it is also in an inclined state. This leads to the sewing needle being prone to interference with the buttonhole on the button, causing needle collision, resulting in scratches on the button or bending and breaking of the sewing needle. The wear rate of the sewing needle is high, and the success rate of button sewing is low. Summary of the Invention

[0003] The purpose of the utility model is to provide a needle swinging mechanism of a button sewing machine in which the needle is always in a vertical state during the swinging process, aiming at the above problems existing in the prior art.

[0004] The purpose of the utility model can be achieved by the following technical solutions: The needle swinging mechanism of a button sewing machine includes a sewing needle and a power source. The power source drives the sewing needle to swing through a linkage. The linkage includes a swinging frame and a mounting block. The swinging frame is horizontally arranged inside the machine shell. The mounting block is hinged inside the machine shell through a rotating shaft. One end of the swinging frame is connected to the mounting block. The other end of the swinging frame is movably penetrated by a needle bar. The needle bar is perpendicular to the swinging frame and is vertically arranged parallel to the rotating shaft. The sewing needle is vertically installed at the bottom of the needle bar. The power source drives the swinging frame to swing with the rotating shaft as the center. The needle bar and the sewing needle swing synchronously with the swinging frame, and the needle bar and the sewing needle are always in a vertical state during the swinging process.

[0005] In the swing needle mechanism of the above-mentioned button sewing machine, the power source is a swing needle motor. The linkage member further includes a driving crank, a first connecting rod, a main transmission crank, a sub-transmission crank, a second connecting rod, and a transmission shaft. The driving crank is fixed on the output shaft of the swing needle motor. One end of the driving crank is hinged to one end of the first connecting rod, and the other end of the first connecting rod is hinged to the main transmission crank. The transmission shaft is hinged inside the machine housing. The main transmission crank is fixed on the transmission shaft, and the sub-transmission crank is also fixed on the transmission shaft. One end of the sub-transmission crank is hinged to one end of the second connecting rod, and the other end of the second connecting rod is hinged to the swing frame.

[0006] In the swing needle mechanism of the above-mentioned button sewing machine, when the swing needle motor starts, the rotation of the output shaft of the swing needle motor is transmitted to the transmission shaft through the driving crank, the first connecting rod, and the main transmission crank, causing the transmission shaft to rotate relative to the machine housing. The rotation of the transmission shaft drives the swing frame to swing through the sub-transmission crank and the second connecting rod.

[0007] Compared with the prior art, in the swing needle mechanism of this button sewing machine, by horizontally arranging the swing frame, the rotating shaft at the end of the swing frame is parallel to the needle bar and the sewing needle. Thus, when the swing needle motor drives the swing frame and the sewing needle to swing around the rotating shaft, the sewing needle is always in a vertical state. When the sewing needle moves vertically downward for sewing, it can always align with the buttonhole on the button, with high precision, avoiding interference between the sewing needle and the button, preventing needle collision, ensuring the service life of the sewing needle, reducing the wear of the sewing needle and the button, and ensuring the success rate of button sewing. The structure is simple, and the transmission process is stable and smooth. Description of the Drawings

[0008] Figure 1 is a three-dimensional structural schematic diagram of the swing needle mechanism in the button sewing machine.

[0009] Figure 2 is a three-dimensional structural schematic diagram of the swing needle mechanism in the button sewing machine from another angle.

[0010] Figure 3 is a three-dimensional structural schematic diagram of the swing needle mechanism and the moving mechanism in the button sewing machine.

[0011] Figure 4 is a three-dimensional structural schematic diagram of the button sewing machine.

[0012] In the figure, 1. Sewing needle; 11. Needle bar; 2. Swing frame; 3. Swing needle motor; 31. Driving crank; 32. First connecting rod; 33. Main transmission crank; 34. Sub-transmission crank; 35. Second connecting rod; 4. Transmission shaft; 5. Mounting block; 51. Rotating shaft; 6. Driving shaft; 61. Needle bar crank; 62. Needle bar connecting rod; 7. Machine housing. Detailed Embodiments

[0013] The following are specific embodiments of the present utility model. In combination with the accompanying drawings, the technical solutions of the present utility model will be further described, but the present utility model is not limited to these embodiments.

[0014] As Figures 1-4 shown, a button sewing machine includes a needle swinging mechanism, a moving mechanism and a machine shell 7. The needle swinging mechanism includes a sewing needle 1 and a power source. The power source drives the sewing needle 1 to swing through a linkage. The linkage includes a swinging frame 2 and a mounting block 5. The swinging frame 2 is horizontally arranged in the machine shell 7. The mounting block 5 is hinged in the machine shell 7 through a rotating shaft 51. One end of the swinging frame 2 is connected to the mounting block 5. A needle bar 11 is movably penetrated through the other end of the swinging frame 2. The needle bar 11 is perpendicular to the swinging frame 2 and is vertically arranged parallel to the rotating shaft 51. The needle bar 11 can move up and down relative to the swinging frame 2. The sewing needle 1 is vertically installed at the bottom of the needle bar 11. The power source drives the swinging frame 2 to swing around the rotating shaft 51. The needle bar 11 and the sewing needle 1 swing synchronously with the swinging frame 2, and during the swinging process, the needle bar 11 and the sewing needle 1 are always in a vertical state.

[0015] In the above technical solution: the power source is a needle swinging motor 3. The linkage further includes a driving crank 31, a first connecting rod 32, a driving main crank 33, a driving sub-crank 34, a second connecting rod 35 and a transmission shaft 4. The driving crank 31 is fixed on the output shaft of the needle swinging motor 3. The driving crank 31 is hinged to one end of the first connecting rod 32. The other end of the first connecting rod 32 is hinged to the driving main crank 33. The transmission shaft 4 is hinged in the machine shell 7. The driving main crank 33 is fixed on the transmission shaft 4. The driving sub-crank 34 is also fixed on the transmission shaft 4. The driving sub-crank 34 is hinged to one end of the second connecting rod 35. The other end of the second connecting rod 35 is hinged to the swinging frame 2.

[0016] When the needle swinging motor 3 starts, the rotation of the output shaft of the needle swinging motor 3 is transmitted to the transmission shaft 4 through the driving crank 31, the first connecting rod 32 and the driving main crank 33, and the transmission shaft 4 rotates relative to the machine shell 7. The rotation of the transmission shaft 4 drives the swinging frame 2 to swing around the rotating shaft 51 through the driving sub-crank 34 and the second connecting rod 35. The needle bar 11 and the sewing needle 1 swing synchronously with the swinging frame 2, and during the swinging process, the needle bar 11 and the sewing needle 1 are always in a vertical state, completing the needle swinging.

[0017] When the swinging frame 2 drives the sewing needle 1 to swing, the moving track of the end of the sewing needle 1 is an arc with the mounting block 5 as the center. At this time, as long as the distance between the buttonhole on the button and the rotating shaft 51 is equal to the distance between the sewing needle 1 and the rotating shaft 51, then the buttonhole is located on the moving track of the sewing needle 1. The needle swinging motor 3 drives the sewing needle 1 to be directly above the buttonhole, ensuring that the sewing needle 1 can be aligned with the buttonhole.

[0018] In the above technical solution: The moving mechanism includes a driving motor and a driving shaft 6, and the output shaft of the driving motor is connected to the driving shaft 6. A needle bar crank 61 is provided at the end of the driving shaft 6, one end of the needle bar crank 61 is connected to a needle bar connecting rod 62, and one end of the needle bar connecting rod 62 is connected to the needle bar 11. During sewing, the driving motor starts and drives the driving shaft 6 to rotate, and then drives the needle bar 11 and the sewing needle 1 to reciprocate up and down relative to the swing frame 2 in sequence through the needle bar crank 61 and the needle bar connecting rod 62.

[0019] In the swing needle mechanism of this button sewing machine, by arranging the swing frame 2 horizontally, the rotating shaft 51 at the end of the swing frame 2 is arranged parallel to the needle bar 11 and the sewing needle 1. Thus, when the swing needle motor 3 drives the swing frame 2 and the sewing needle 1 to swing around the rotating shaft 51, the sewing needle 1 is always in a vertical state. When the sewing needle 1 moves vertically downward for sewing, it can always align with the buttonhole on the button, with high accuracy, avoiding interference between the sewing needle 1 and the button, avoiding needle collision, ensuring the service life of the sewing needle 1, reducing the wear of the sewing needle 1 and the button, ensuring the success rate of button sewing; the structure is simple and the transmission process is stable and smooth.

[0020] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Those skilled in the art to which the present invention pertains can make various modifications or supplements to the described specific embodiments or use similar ways to substitute, but will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

[0021] Although terms such as sewing needle 1; needle bar 11; swing frame 2; swing needle motor 3; driving crank 31; first connecting rod 32; main transmission crank 33; auxiliary transmission crank 34; second connecting rod 35; transmission shaft 4; mounting block 5; rotating shaft 51; driving shaft 6; needle bar crank 61; needle bar connecting rod 62; machine shell 7 are used more frequently herein, the possibility of using other terms is not excluded. Using these terms is only for more conveniently describing and explaining the essence of the present invention; interpreting them as any additional limitation is contrary to the spirit of the present invention.

[0022] The content not described in detail in this specification belongs to the prior art well-known to those skilled in the art. The specific embodiments described herein are merely illustrative of the spirit of the present invention. Those skilled in the art to which the present invention pertains can make various modifications or supplements to the described specific embodiments or use similar ways to substitute, but will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. The needle swing mechanism of the button sewing machine is characterized by The invention comprises a machine needle (1) and a power source, wherein the power source drives the machine needle (1) to swing through a linkage, wherein the linkage comprises a swing frame (2) and a mounting block (5), wherein the swing frame (2) is horizontally arranged in a housing (7), and the mounting block (5) is hinged in the housing (7) through a rotating shaft (51), wherein one end of the swing frame (2) is connected to the mounting block (5), and a needle bar (11) is movably penetrated through the other end of the swing frame (2), wherein the needle bar (11) is perpendicular to the swing frame (2) and parallel to the rotating shaft (51) and is vertically arranged, and the machine needle (1) is vertically mounted at the bottom of the needle bar (11), and the power source drives the swing frame (2) to swing around the rotating shaft (51), wherein the needle bar (11) and the machine needle (1) swing synchronously with the swing frame (2), and during the swinging process, the needle bar (11) and the machine needle (1) are always in a vertical state.

2. The needle swing mechanism of the button sewing machine according to claim 1, characterized in that The power source is a oscillating needle motor (3), and the linkage also includes a driving crank (31), a first connecting rod (32), a transmission main crank (33), a transmission sub-crank (34), a second connecting rod (35), and a transmission shaft (4); the driving crank (31) is fixed on the output shaft of the oscillating needle motor (3); the driving crank (31) is hinged to one end of the first connecting rod (32); the other end of the first connecting rod (32) is hinged to the transmission main crank (33); the transmission shaft (4) is hinged in the housing (7); the transmission main crank (33) is fixed on the transmission shaft (4); the transmission sub-crank (34) is also fixed on the transmission shaft (4); the transmission sub-crank (34) is hinged to one end of the second connecting rod (35); the other end of the second connecting rod (35) is hinged to the swing frame (2); The oscillating needle motor (3) is started, and the rotation of the output shaft of the oscillating needle motor (3) is transmitted to the transmission shaft (4) through the driving crank (31), the first connecting rod (32), and the transmission main crank (33), and the transmission shaft (4) is caused to rotate relative to the housing (7); the rotation of the transmission shaft (4) drives the oscillating frame (2) to oscillate through the transmission sub-crank (34) and the second connecting rod (35).

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