CN109629129B - Floating presser foot structure of sewing machine - Google Patents

Floating presser foot structure of sewing machine Download PDF

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Publication number
CN109629129B
CN109629129B CN201811565040.5A CN201811565040A CN109629129B CN 109629129 B CN109629129 B CN 109629129B CN 201811565040 A CN201811565040 A CN 201811565040A CN 109629129 B CN109629129 B CN 109629129B
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China
Prior art keywords
presser foot
pin
rotating pin
sewing machine
floating
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CN109629129A (en
Inventor
柯祥林
祝书伟
位延辉
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Jack Technology Co Ltd
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Jack Sewing Machine Co Ltd
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    • DTEXTILES; PAPER
    • D05SEWING; EMBROIDERING; TUFTING
    • D05BSEWING
    • D05B29/00Pressers; Presser feet
    • D05B29/06Presser feet
    • DTEXTILES; PAPER
    • D05SEWING; EMBROIDERING; TUFTING
    • D05BSEWING
    • D05B29/00Pressers; Presser feet
    • D05B29/06Presser feet
    • D05B29/08Presser feet comprising relatively-movable parts

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Sewing Machines And Sewing (AREA)

Abstract

The invention provides a floating presser foot structure of a sewing machine, and belongs to the technical field of clothing manufacturing equipment. It has solved the inhomogeneous technical problem of waiting of pressure of current sewing machine presser foot. The utility model provides a sewing machine's presser foot structure that floats, this presser foot structure that floats includes the presser foot pole, presser foot handle and presser foot board, the lower extreme at the presser foot handle is passed through the connecting pin to the presser foot board, the mounting groove has been seted up to the upper end of presser foot handle, the lower extreme of presser foot pole is inserted and is established and be equipped with the resistance spring in the mounting groove and between the lower extreme of presser foot pole and the mounting groove bottom, the bayonet socket groove has been seted up to the upper end lateral part of presser foot handle, the lower extreme of presser foot pole is connected with the rotation pin, the length direction setting of length direction along the presser foot board of rotation pin, the tip. The floating presser foot structure in the invention has more uniform pressure applied to the sewing material and is convenient to install and disassemble.

Description

Floating presser foot structure of sewing machine
Technical Field
The invention belongs to the technical field of clothing manufacturing equipment, and relates to a presser foot of a sewing machine, in particular to a floating presser foot structure of the sewing machine.
Background
A sewing machine is a machine that uses one or more sewing threads to form one or more stitches in a material to be sewn, thereby interweaving or stitching one or more layers of material. The sewing machine can sew fabrics such as cotton, hemp, silk, wool, artificial fiber and the like and products such as leather, plastic, paper and the like, and the sewed stitches are neat, beautiful, flat and firm, the sewing speed is high, and the use is simple and convenient. The sewing machine is generally composed of four parts, namely a feeding device, a machine base, a transmission part and an accessory part, and is used for sewing up a sewing material by reasonably matching and circulating the motion of each mechanism, wherein a presser foot is an important part in the sewing machine, and when the sewing machine is used for sewing operation, the presser foot is matched with teeth on a feed dog to convey the sewing material forwards and press the sewing material, so that the sewing material is prevented from wrinkling and bulging, and sewing stitches are formed by matching with other mechanisms such as a sewing needle and the like, and the sewing effect is ensured. The structure of the presser foot in the existing sewing machine is that the presser foot is fixed with the presser foot rod through a fixing screw.
Chinese patent (publication number: CN207331220U, published: 2018-05-08) discloses an outer presser foot mechanism of a template sewing machine, which comprises a presser foot lifting cylinder, wherein a piston rod of the presser foot lifting cylinder is connected with the upper end of an outer presser foot shaft through a floating joint; the external pressure foot shaft is fixedly connected with an anti-rotation frame, and the anti-rotation frame is simultaneously connected with an anti-rotation shaft; the lower end of the external presser foot shaft is fixedly connected with an external presser foot; the up-and-down movement of the outer presser foot is controlled by a presser foot lifting cylinder. The rotation preventing shaft is arranged in parallel with the external pressure foot shaft. The presser foot lifting cylinder is fixedly arranged at the top of the machine head; the top surface of the shell of the machine head is provided with a machine head upper hole, and the bottom surface of the shell of the machine head is provided with a first machine head lower hole and a second machine head lower hole in parallel; a piston rod of the presser foot lifting cylinder penetrates through an upper hole of the machine head, and an outer presser foot shaft penetrates through a lower hole of the first machine head; the floating joint is positioned in the inner cavity of the handpiece.
The external presser foot mechanism in the patent document is not convenient enough in installation and disassembly, and affects the presser foot replacement efficiency aiming at different sewing materials and different garment technologies; moreover, because the left and right thicknesses of the sewing material are different or the processing errors of some parts such as the presser foot, the feed dog, the needle plate, the machine shell and the like are accumulated, the phenomenon that the tooth crest plane of the feed dog is matched with the presser foot plane of the presser foot is uneven can occur, the pressure of the presser foot on the sewing material is uneven at the moment, and the phenomena of stitch deviation and sewing material wrinkling can occur in the cloth feeding under the condition.
Disclosure of Invention
The invention provides a floating presser foot structure of a sewing machine aiming at the problems in the prior art, and the technical problems to be solved by the invention are as follows: how to improve the uniformity of the presser foot on applying pressure to the sewing material and improve the convenience of mounting and dismounting the presser foot.
The purpose of the invention can be realized by the following technical scheme:
the floating presser foot structure of the sewing machine comprises a presser foot rod, a presser foot handle and a presser foot plate, wherein the presser foot plate is connected to the lower end of the presser foot handle through a connecting pin.
The principle is as follows: when the cloth feeding device works normally, the bottom of the presser foot plate at the lower end of the presser foot handle is completely attached to teeth on the cloth feeding tooth, when the teeth on the cloth feeding tooth are uneven with a reference horizontal plane or uneven in thickness of the left side and the right side of a sewing material, the presser foot handle rotates by taking the rotating pin as an axis, the resistance spring is compressed, until the height deviation of the teeth on the cloth feeding tooth or the thickness deviation of the left side and the right side of the sewing material are eliminated, the teeth on the cloth feeding tooth are completely attached to the bottom of the presser foot plate, and therefore the uniform reliability of the pressure applied.
When the presser foot structure needs to be replaced, a finger downwards dials the shifting pin along the same direction, the shifting pin drives the rotating pin to rotate clockwise, the rotating pin rotates to the abdicating plane to be parallel to the groove wall of the bayonet groove, at the moment, the rotating pin can be separated from the neck part of the bayonet groove, and the presser foot handle and the presser foot plate can be taken down; when the presser foot structure is installed, the rotating pin is rotated to the abdication plane to be aligned with the groove wall of the bayonet groove, the rotating pin is placed at the bottom of the bayonet groove, the abdication plane on the rotating pin rotates to be staggered with the groove wall of the bayonet groove after the presser foot handle is assembled with the presser foot rod, and the rotating pin cannot be separated from the bottom circle of the bayonet groove, so that the installation of the presser foot is completed.
According to the technical scheme, the presser foot handle and the presser foot plate can float left and right, and the phenomenon that the pressing foot plate and teeth on the feed dog are not smooth due to matching caused by processing problems and the phenomenon that pressure applied by the presser foot structure is uneven due to uneven left and right thickness of partial sewing materials can be adapted, so that the stitch deviation and sewing material wrinkling caused by the phenomenon can be effectively improved. Meanwhile, under the requirements of different sewing materials and sewing processes, the quick switching of presser foot structures of different specifications can be realized, related tools are not required, and the convenience and the working efficiency of operation can be effectively improved.
In the floating presser foot structure of the sewing machine, a through hole is formed in one side of the circumferential surface of the lower end of the presser foot rod, the rotating pin is movably inserted into the through hole, two ends of the rotating pin extend out of the through hole, the bayonet grooves are formed in the side portions of two sides of the upper end of the presser foot handle, and two ends of the rotating pin are respectively clamped in the two bayonet grooves.
In the floating presser foot structure of the sewing machine, the rotating pin is cylindrical, the end part of the rotating pin is further provided with a yielding plane, the yielding plane is a plane which is formed by the end surface of the rotating pin and is arranged inwards along the axial direction, and the rotating pin is connected with a shifting pin which can drive the rotating pin to rotate.
In the floating presser foot structure of the sewing machine, a vertical open slot is formed in the other side of the circumferential surface of the lower end of the presser foot rod, one end of the poking pin is fixedly connected to the circumferential surface of the rotating pin, the other end of the poking pin extends out of the presser foot rod from the open slot, and a reset spring is further arranged on the poking pin. Furthermore, the pin hole is formed in the circumferential surface of the rotating pin, the end part of the shifting pin is inserted into the pin hole, the shifting pin and the pin hole are in interference fit, the position of the shifting pin is kept fixed under the action of the reset spring, the rotating pin cannot be separated from the bayonet groove, and the pressure foot handle can be prevented from falling off.
In the floating presser foot structure of the sewing machine, the bottom of the mounting groove is provided with the spring groove, the end face of the lower end of the presser foot rod is fixedly provided with the baffle, one end of the resistance spring is inserted in the spring groove, and the other end of the resistance spring is abutted against the bottom of the baffle.
In the floating presser foot structure of the sewing machine, the return spring is positioned in the open slot, the outer end of the poking pin is obliquely and upwards arranged, one end of the return spring abuts against the upper side of the baffle, and the other end of the return spring abuts against the lower side of the poking pin.
In the floating presser foot structure of the sewing machine, the notch of the bayonet groove is provided with a neck part with a diameter smaller than the bottom, and the bottom of the bayonet groove is an arc surface matched with the rotating pin. The diameter of the bottom of the bayonet groove is the same as or slightly larger than that of the rotating pin, and the size of the neck of the bayonet groove is smaller than that of the rotating pin and larger than the radial size of the rotating pin at the abdication plane, so that when the abdication plane is flush with the groove wall of the bayonet groove, the whole rotating pin can smoothly pass through the neck of the bayonet groove and is separated out, and the pressure foot handle is convenient to disassemble; during installation, after the rotating pin is assembled and enters the bayonet groove, the rotating pin rotates by a certain angle, and the abdicating plane is staggered with the groove wall of the bayonet groove, so that the rotating pin can be limited, and the rotating pin can not fall off.
Compared with the prior art, the invention has the following advantages:
1. the presser foot handle and the presser foot plate in the floating presser foot structure can float left and right, and can adapt to the phenomenon of uneven matching of the presser foot plate and teeth on the feed dog due to processing problems and the phenomenon of uneven pressure applied by the presser foot structure due to uneven left and right thickness of partial sewing materials, thereby effectively improving the phenomena of stitch deviation and sewing material wrinkling caused by the phenomena.
2. Under the requirements of different sewing materials and sewing processes, the floating presser foot structure can realize the quick replacement of presser foot structures with different specifications, does not need to use related tools, and can effectively improve the convenience and the working efficiency of operation.
Drawings
Fig. 1 is a schematic view of the mounting structure of the floating presser foot structure.
Fig. 2 is a schematic perspective view of the floating presser foot structure.
Fig. 3 is an exploded view of the present floating presser foot arrangement.
Fig. 4 is a schematic sectional structure view of the floating presser foot structure.
Fig. 5 is a schematic sectional view of the floating presser foot structure with the presser foot handle inclined to one side.
Fig. 6 is a schematic view of the floating presser foot structure disassembled.
In the figure, 1, a presser foot rod; 1a, a through hole; 1b, an open slot; 2. a presser foot handle; 21. mounting grooves; 22. a bayonet slot; 22a, a neck; 23. a spring slot; 3. a foot pressing plate; 4. a resistance spring; 5. a rotation pin; 51. a yielding plane; 52. a pin hole; 6. pulling a pin; 7. a return spring; 8. and a baffle plate.
Detailed Description
The following are specific embodiments of the present invention and are further described with reference to the drawings, but the present invention is not limited to these embodiments.
As shown in fig. 1 to 4, the floating presser foot structure of the present sewing machine includes a presser bar 1, the pressure foot bar comprises a pressure foot handle 2 and a pressure foot plate 3, the pressure foot plate 3 is connected to the lower end of the pressure foot handle 2 through a connecting pin, the upper end of the pressure foot handle 2 is provided with an installation groove 21, the lower end of the pressure foot rod 1 is inserted in the installation groove 21, a resistance spring 4 is arranged between the lower end of the pressure foot rod 1 and the bottom of the installation groove 21, the side part of the upper end of the pressure foot handle 2 is provided with a bayonet groove 22, the notch of the bayonet groove 22 is provided with a neck part 22a with a diameter smaller than that of the bottom part, the lower end of the pressure foot rod 1 is connected with a rotating pin 5, the rotating pin 5 is arranged along the length direction of the pressure foot plate 3, the end part of the rotating pin 5 is positioned at the bottom of the bayonet groove 22, the end part of the rotating pin 5 is also provided with a yielding plane 51, the rotating pin 5 is cylindrical, the yielding plane 51; the rotating pin 5 is connected with a shifting pin 6 which can drive the rotating pin 5 to rotate. Specifically, a through hole 1a is formed in one side of the circumferential surface of the lower end of the presser foot rod 1, the rotating pin 5 is movably inserted into the through hole 1a, two ends of the rotating pin 5 extend out of the through hole 1a, the bayonet grooves 22 are formed in the side portions of two sides of the upper end of the presser foot handle 2, and two ends of the rotating pin 5 are respectively clamped in the two bayonet grooves 22; vertical open slot 1b has been seted up to the opposite side on the global of lower extreme of presser bar 1, and the one end of shifting pin 6 links firmly on the global of rotating pin 5, and outside the other end of shifting pin 6 stretched out presser bar 1 from open slot 1b, still was equipped with reset spring 7 on the shifting pin 6. Further, a pin hole 52 is formed in the circumferential surface of the rotating pin 5, the end of the shifting pin 6 is inserted into the pin hole 52, the two are in interference fit, the position of the shifting pin 6 is kept fixed under the action of the return spring 7, the rotating pin 5 cannot be separated from the bayonet groove 22, and the falling-off of the presser foot handle 2 can be prevented; a spring groove 23 is formed in the bottom of the mounting groove 21, a baffle plate 8 is fixedly arranged on the end face of the lower end of the presser foot rod 1, one end of the resistance spring 4 is inserted into the spring groove 23, and the other end of the resistance spring abuts against the bottom of the baffle plate 8; reset spring 7 is located open slot 1b, and the outer end of swizzle 6 sets up to one side, and reset spring 7's one end supports and leans on the upside of baffle 8, and the other end supports and leans on the downside of swizzle 6.
During normal work, the bottom of the foot pressing plate 3 at the lower end of the foot pressing handle 2 is completely attached to teeth on the cloth feeding tooth, as shown in a combined drawing 5, when the teeth on the cloth feeding tooth are uneven with a reference horizontal plane or uneven in thickness of the left side and the right side of a sewing material, the foot pressing handle 2 rotates by taking the rotating pin 5 as an axis, the resistance spring 4 is compressed until the height deviation of the left side and the right side of the teeth on the cloth feeding tooth or the thickness deviation of the left side and the right side of the sewing material are eliminated, the teeth on the cloth feeding tooth are completely attached to the bottom of the foot pressing plate 3, and therefore the uniform reliability of the.
As shown in fig. 6, the diameter of the bottom of the bayonet slot 22 is the same as the diameter of the rotation pin 5 or slightly larger than the diameter of the rotation pin 5, and the size of the neck 22a of the bayonet slot 22 is smaller than the diameter of the rotation pin 5 and larger than the radial size of the rotation pin 5 at the abdicating plane 51, so that when the abdicating plane 51 is flush with the slot wall of the bayonet slot 22, the whole rotation pin 5 can smoothly pass through the neck 22a of the bayonet slot 22 and be disengaged; when the abdicating plane 51 is dislocated with the groove wall of the bayonet groove 22, the rotating pin 5 can be limited, and the rotating pin 5 is ensured not to fall off. Specifically, when the presser foot structure needs to be replaced, a finger pulls the poking pin 6 downwards along the trend, the poking pin 6 drives the rotating pin 5 to rotate clockwise, the rotating pin 5 rotates until the abdicating plane 51 is parallel to the groove wall of the bayonet groove 22, at the moment, the rotating pin 5 can be separated from the neck 22a of the bayonet groove 22, and the presser foot handle 2 and the presser foot plate 3 can be taken down; when the presser foot structure is installed, the rotating pin 5 is rotated to the abdicating plane 51 to be aligned with the groove wall of the bayonet groove 22, the rotating pin 5 is placed at the bottom of the bayonet groove 22, after the presser foot handle 2 is assembled with the presser foot rod 1, the abdicating plane 51 on the rotating pin 5 rotates to be staggered with the groove wall of the bayonet groove 22, the rotating pin 5 cannot be separated from the bottom circle of the bayonet groove 22, and the installation of the presser foot is completed.
The presser foot handle 2 and the presser foot plate 3 in the embodiment can float left and right, and can adapt to the phenomenon that the teeth on the presser foot plate 3 and the feed dog are not smooth due to matching caused by processing problems and the phenomenon that pressure applied by the presser foot structure is uneven due to uneven left and right thickness of partial sewing materials, so that the stitch deviation and the sewing material wrinkling caused by the phenomenon are effectively improved. Meanwhile, under the requirements of different sewing materials and sewing processes, the quick switching of presser foot structures of different specifications can be realized, related tools are not required, and the convenience and the working efficiency of operation can be effectively improved.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.
Although 1, a presser bar is used more herein; 1a, a through hole; 1b, an open slot; 2. a presser foot handle; 21. mounting grooves; 22. a bayonet slot; 22a, a neck; 23. a spring slot; 3. a foot pressing plate; 4. a resistance spring; 5. a rotation pin; 51. a yielding plane; 52. a pin hole; 6. pulling a pin; 7. a return spring; 8. baffles and the like, but does not exclude the possibility of using other terms. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed as being without limitation to any additional limitations that may be imposed by the spirit of the present invention.

Claims (7)

1. A floating presser foot structure of a sewing machine comprises a presser foot rod (1), a presser foot handle (2) and a presser foot plate (3), wherein the presser foot plate (3) is connected to the lower end of the presser foot handle (2) through a connecting pin, and is characterized in that the upper end of the presser foot handle (2) is provided with an installation groove (21), the lower end of the presser foot rod (1) is inserted in the installation groove (21), a resistance spring (4) is arranged between the lower end of the presser foot rod (1) and the bottom of the installation groove (21), the side part of the upper end of the presser foot handle (2) is provided with a bayonet groove (22), the lower end of the presser foot rod (1) is connected with a rotating pin (5), the rotating pin (5) is arranged along the length direction of the presser foot plate (3), and the end part of the rotating pin (5) is positioned at the bottom of the bayonet groove (22); the rotating pin (5) is cylindrical, the bottom of the bayonet groove (22) is an arc surface matched with the rotating pin (5), and the presser foot handle (2) can rotate by taking the rotating pin (5) as an axis.
2. The floating presser foot structure of a sewing machine according to claim 1, wherein a through hole (1 a) is formed in one side of the lower end peripheral surface of the presser bar (1), the rotating pin (5) is movably inserted into the through hole (1 a) and both ends of the rotating pin (5) extend out of the through hole (1 a), the bayonet grooves (22) are formed in both side portions of the upper end of the presser handle (2), and both ends of the rotating pin (5) are respectively clamped in the two bayonet grooves (22).
3. The floating presser foot structure of the sewing machine according to claim 1 or 2, wherein the end of the rotating pin (5) is further provided with a relief plane (51), the relief plane (51) is a plane which is formed by an end surface of the rotating pin (5) along an axial direction and is inwardly opened, and the rotating pin (5) is connected with a shifting pin (6) which can drive the rotating pin (5) to rotate.
4. The floating presser foot structure of a sewing machine according to claim 3, wherein a vertical open slot (1 b) is formed in the other side of the lower end peripheral surface of the presser bar (1), one end of the poking pin (6) is fixedly connected to the peripheral surface of the rotating pin (5), the other end of the poking pin (6) extends out of the presser bar (1) from the open slot (1 b), and a return spring (7) is further arranged on the poking pin (6).
5. The floating presser foot structure of sewing machine according to claim 4, characterized in that a spring groove (23) is opened at the bottom of the mounting groove (21), a baffle (8) is fixedly arranged on the lower end surface of the presser bar (1), one end of the resistance spring (4) is inserted in the spring groove (23), and the other end abuts against the bottom of the baffle (8).
6. The floating presser foot structure of sewing machine according to claim 5, characterized in that said return spring (7) is located in said open slot (1 b), the outer end of said thumb pin (6) is disposed obliquely upward, one end of said return spring (7) abuts against the upper side of said baffle (8), and the other end abuts against the lower side of said thumb pin (6).
7. The floating presser foot structure of sewing machine according to claim 6, wherein said bayonet groove (22) has a neck portion (22 a) at the notch with a smaller diameter than the bottom portion.
CN201811565040.5A 2018-12-20 2018-12-20 Floating presser foot structure of sewing machine Active CN109629129B (en)

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Application Number Priority Date Filing Date Title
CN201811565040.5A CN109629129B (en) 2018-12-20 2018-12-20 Floating presser foot structure of sewing machine

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Application Number Priority Date Filing Date Title
CN201811565040.5A CN109629129B (en) 2018-12-20 2018-12-20 Floating presser foot structure of sewing machine

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CN109629129B true CN109629129B (en) 2021-01-26

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Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110042571B (en) * 2019-04-30 2024-05-28 美机科技集团有限公司 Sewing machine and outer presser foot mechanism thereof
CN110952230B (en) * 2019-12-23 2020-08-04 江苏爱护佳健康科技有限公司 Automatic change duplex flush joint machine presser foot device

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH332774A (en) * 1954-09-15 1958-09-30 Pfaff Ag G M Upper feed foot device for sewing machines
US3759202A (en) * 1971-10-21 1973-09-18 Blanc F Jean Self-centering foot for sewing machines
CN2714590Y (en) * 2003-11-21 2005-08-03 精机机械厂股份有限公司 Automatically adjustable double step type cloth presser foot
CN201068508Y (en) * 2007-07-04 2008-06-04 金利佳股份有限公司 Elastic force extension type cloth press foot
CN202936602U (en) * 2012-10-16 2013-05-15 西安标准工业股份有限公司 Floating roller presser foot
CN205592263U (en) * 2015-11-25 2016-09-21 巨力索具股份有限公司 Rotatory quick -release pin structure

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Address after: 318014 No. 1008, east section of Donghai Avenue, Sanjia, Jiaojiang District, Taizhou City, Zhejiang Province

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