CN216972843U - Presser foot lifting mechanism of sewing machine - Google Patents
Presser foot lifting mechanism of sewing machine Download PDFInfo
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- CN216972843U CN216972843U CN202220749381.3U CN202220749381U CN216972843U CN 216972843 U CN216972843 U CN 216972843U CN 202220749381 U CN202220749381 U CN 202220749381U CN 216972843 U CN216972843 U CN 216972843U
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- presser foot
- foot lifting
- rear lever
- sewing machine
- inner shaft
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Abstract
The utility model provides a presser foot lifting mechanism of a sewing machine, and belongs to the technical field of sewing machines. The lifting mechanism solves the problem that the maximum height of the presser foot component of the sewing machine in the prior art is certain. The presser foot lifting mechanism of the sewing machine comprises a presser foot lifting ejector rod, a presser foot lifting rear lever and a presser foot lifting pull rod which are sequentially connected, wherein the presser foot lifting rear lever is hinged with a knee control ejector rod, the presser foot lifting ejector rod comprises an inner shaft and a shaft sleeve movably sleeved outside the inner shaft, the shaft sleeve is connected with the presser foot lifting rear lever and can axially extend and retract relative to the inner shaft, and the presser foot lifting rear lever can be driven to swing up and down by driving the inner shaft or the knee control ejector rod to move upwards. The utility model has the advantage that the lifting height of the presser foot component can be flexibly changed by the sewing machine so as to meet different sewing requirements.
Description
Technical Field
The utility model belongs to the technical field of sewing machines, and relates to a presser foot lifting mechanism of a sewing machine.
Background
The existing sewing machine has the maximum lifting height of the presser foot component which is fixed during the operation, however, the cloth needing to be sewn in the actual production may have various thicknesses, and for thick materials, if the maximum lifting height of the presser foot component is too low, the sewing work cannot be carried out, so that the universality of the existing sewing machine is poor.
Disclosure of Invention
The utility model aims to provide a presser foot lifting mechanism of a sewing machine, aiming at the problems in the prior art. The utility model solves the technical problem of how to enable a sewing machine to flexibly change the lifting height of a presser foot component so as to meet different sewing requirements.
The purpose of the utility model can be realized by the following technical scheme:
the presser foot lifting mechanism of the sewing machine comprises a presser foot lifting ejector rod, a presser foot lifting rear lever and a presser foot lifting pull rod which are sequentially connected, and is characterized in that the presser foot lifting rear lever is hinged with a knee control ejector rod, the presser foot lifting ejector rod comprises an inner shaft and a shaft sleeve movably sleeved outside the inner shaft, the shaft sleeve is connected with the presser foot lifting rear lever and can axially extend and retract relative to the inner shaft, and the presser foot lifting rear lever can be driven to swing up and down by driving the inner shaft or the knee control ejector rod to move up.
When the pressure foot lifting device is used, the pressure foot component is connected with the pressure foot lifting pull rod, when the pressure foot lifting push rod drives the pressure foot component to lift, firstly, an inner shaft of the pressure foot lifting push rod moves upwards under stress, at the moment, the inner shaft and a shaft sleeve of the pressure foot lifting push rod do not move relatively, the length of the pressure foot lifting push rod is L1, then, the pressure foot lifting push rod is lifted to drive a pressure foot lifting rear lever to swing downwards, the pressure foot lifting rear lever drives the pressure foot component to move upwards through the pressure foot lifting pull rod, and the maximum height which can be lifted by the pressure foot component is H1; when the presser foot component is driven to lift through the knee control ejector rod, the knee control ejector rod is driven to move upwards by hands or knees, then the knee control ejector rod drives the end, connected with the presser foot lifting pull rod, of the presser foot lifting rear lever to swing downwards, and the end, connected with the shaft sleeve, swings upwards, at the moment, the shaft sleeve of the presser foot lifting ejector rod is driven to stretch axially relative to the inner shaft by the presser foot lifting rear lever, the length of the stretched presser foot lifting ejector rod is L2, the knee control ejector rod continues to drive the end, connected with the presser foot lifting pull rod, of the presser foot lifting rear lever to swing downwards, so that the presser foot component is driven to move upwards by the presser foot lifting pull rod after the presser foot lifting rear lever, as L2 is larger than L1, namely the length of the presser foot lifting ejector rod is increased, the downward swinging amplitude of the end, connected with the presser foot lifting pull rod, of the presser foot rear lever is driven by the presser foot pull rod to move upwards, and the distance of the presser foot component is increased accordingly, therefore, the maximum height H2 which can be lifted by upward movement of the presser foot component is also larger than H1, so that the lifting height of the presser foot component can be adjusted according to the thickness of sewing cloth, and the sewing machine can flexibly change the lifting height of the presser foot component to meet different sewing requirements.
In the presser foot lifting mechanism of the sewing machine, the presser foot lifting rear lever comprises a rear lever swing fork and a rear lever swing rod, a fork opening is formed in the end part of the rear lever swing fork along the length direction of the rear lever swing fork, and the end part of the rear lever swing rod is movably clamped in the fork opening through a first shaft position screw. According to the structure, when the presser foot lifting ejector rod drives the presser foot component to lift, the presser foot lifting ejector rod drives the rear lever swing rod of the rear presser foot lifting lever firstly, and then the rear lever swing fork, the presser foot lifting pull rod and the presser foot component are driven to move through the rear lever swing rod; when the presser foot component is driven to lift through the knee control ejector rod, the knee control ejector rod is a rear lever swing fork for driving a rear lever for lifting the presser foot, the rear lever swing rod, the presser foot lifting pull rod and the presser foot component are driven to move through the rear lever swing fork, and the shaft sleeve is telescopic relative to the inner shaft, so that the two movement processes of the mode of driving the presser foot component to lift through the presser foot ejector rod and the mode of driving the presser foot component to lift through the knee control ejector rod are not interfered with each other, the lifting height of the mode of driving the presser foot component to lift through the knee control ejector rod is higher than the lifting height of the mode of driving the presser foot component to lift through the presser foot ejector rod (if the length of the presser foot ejector rod is unchanged, the length of the presser foot lifting ejector rod is limited by the lifting mode of driving the presser foot component through the knee control ejector rod because the knee control ejector rod is positioned between the presser foot ejector rod and the rear lever for lifting the presser foot, and the lifting height of the presser foot component through the knee control ejector rod is generally smaller than the lifting height of the presser foot component through driving the presser foot ejector rod The elevation height of the elevation mode of the presser foot assembly) so that a user can select any one of the driving modes more conveniently.
In the presser foot lifting mechanism of the sewing machine, the inner shaft is provided with the mounting plate, and the tension spring is arranged between the rear lever swing rod and the mounting plate. The top of the shaft sleeve is fixedly connected with the rear lever swing rod, the tension spring with the structure can ensure the stability of the sleeved state between the inner shaft and the shaft sleeve, and meanwhile, the effect of auxiliary reset can be achieved.
In the presser foot lifting mechanism of the sewing machine, the middle part of the rear lever swing rod extends downwards to form an installation part, the top of the shaft sleeve is hinged with the installation part through a second shaft position screw penetrating through the shaft sleeve and the installation part, and the upper end of the tension spring is arranged on the installation part. The structure enables the tension spring to better ensure the stability of the sleeving state between the inner shaft and the shaft sleeve, and simultaneously enables the rear lever swing rod to better drive the shaft sleeve to axially stretch relative to the inner shaft.
In the presser foot lifting mechanism of the sewing machine, the rear lever swing fork is in an L shape, the bending part of the rear lever swing fork and the end part of the rear lever swing rod, which is far away from the fork opening, are respectively hinged with the shell of the sewing machine, the end part of the rear lever swing fork, which is far away from the fork opening, is hinged with the presser foot lifting pull rod, and the upper end of the knee control ejector rod is hinged with the middle part of the rear lever swing fork. The structure enables the rear lever swing fork to better pull the presser foot lifting pull rod and better drive the swing of the rear lever swing rod after swinging, and simultaneously enables the rear lever swing rod to better drive the swing of the rear lever swing fork after swinging.
In the presser foot lifting mechanism of the sewing machine, the inner shaft is connected with a power source in a transmission manner. The power source makes the mode of lifting presser foot subassembly lifting through lifting presser foot ejector pin be automatic drive, and the mode of driving presser foot subassembly lifting through knee accuse ejector pin is manual to make the user conveniently choose for use arbitrary drive mode more.
In the presser foot lifting mechanism of the sewing machine, the bottom of the inner shaft is provided with the hinged part, the power source is a motor, the transmission shaft of the motor is provided with the presser foot lifting drive plate, and the presser foot lifting drive plate is hinged with the hinged part. The structure enables the motor to better drive the movement of the presser foot lifting ejector rod.
Compared with the prior art, this sewing machine lift presser foot mechanism's advantage lies in: this presser foot mechanism of lifting of sewing machine can be through motor automatic drive presser foot subassembly lifting, can pass through knee accuse ejector pin manual drive presser foot subassembly lifting again, and the maximum height that can the lifting through knee accuse ejector pin drive presser foot subassembly is greater than the maximum height that can the lifting through motor drive presser foot subassembly, these two motion process mutually noninterferes of mode through motor drive presser foot subassembly lifting and the mode through knee accuse ejector pin drive presser foot subassembly lifting simultaneously, thereby realized adjusting the presser foot subassembly height according to the thickness of sewing cloth, make the sewing machine can change the lifting height of presser foot subassembly in a flexible way in order to satisfy different sewing demands, and make the user can choose arbitrary drive mode for use more conveniently.
Drawings
FIG. 1 is a schematic perspective view of a presser foot lifting mechanism of the sewing machine mounted on a housing.
FIG. 2 is a schematic perspective view of the presser foot lifting mechanism of the present sewing machine, with the front lever and presser foot lifting assembly removed.
FIG. 3 is a second schematic perspective view of the presser foot lifting mechanism of the sewing machine, except for the front lever for lifting the presser foot and the presser foot assembly.
FIG. 4 is an exploded view of the presser foot lifting mechanism of the present sewing machine with the presser foot lifting front lever and presser foot assembly removed.
In the figure, 1, a power source; 2. lifting a presser foot ejector rod; 21. an inner shaft; 22. a shaft sleeve; 3. lifting a rear lever of the presser foot; 31. a rear lever pendulum fork; 32. a rear lever swing link; 4. lifting a presser foot pull rod; 7. a knee control ejector rod; 8. a first axial position screw; 9. a fork opening; 10. a housing; 11. mounting a plate; 12. a tension spring; 13. an installation part; 14. a second axial position screw; 16. lifting the presser foot drive plate; 17. a hinge portion.
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.
A presser foot lifting mechanism of a sewing machine is disclosed, referring to fig. 1-4, and comprises a presser foot lifting ejector rod 2, a presser foot lifting rear lever 3 and a presser foot lifting pull rod 4 which are sequentially connected, wherein the presser foot lifting rear lever 3 is hinged with a knee control ejector rod 7, the presser foot lifting ejector rod 2 comprises an inner shaft 21 and a shaft sleeve 22 movably sleeved outside the inner shaft 21, the shaft sleeve 22 is connected with the presser foot lifting rear lever 3 and can axially extend and retract relative to the inner shaft 21, and the presser foot lifting rear lever 3 can be driven to swing up and down by driving the inner shaft 21 or the knee control ejector rod 7 to move upwards. Specifically, the presser foot lifting rear lever 3 comprises a rear lever swing fork 31 and a rear lever swing rod 32, a fork opening 9 is formed in the end portion of the rear lever swing fork 31 along the length direction of the rear lever swing fork, and the end portion of the rear lever swing rod 32 is movably clamped in the fork opening 9 through a first axial screw 8. The rear lever swing fork 31 is L-shaped, the bending part of the rear lever swing fork 31 and the end part of the rear lever swing rod 32 far away from the fork opening 9 are respectively hinged with the shell 10 of the sewing machine, the end part of the rear lever swing fork 31 far away from the fork opening 9 is hinged with the presser foot lifting pull rod 4, and the upper end of the knee control ejector rod 7 is hinged with the middle part of the rear lever swing fork 31. The inner shaft 21 is connected with a power source 1 in a transmission way. The power source 1 of the present embodiment is preferably a motor, the bottom of the inner shaft 21 is provided with a hinge portion 17, the power source 1 is a motor, a transmission shaft of the motor is provided with a pressure foot lifting drive plate 16, and the pressure foot lifting drive plate 16 is hinged to the hinge portion 17.
Referring to fig. 1, 2, 3 and 4, further, a mounting plate 11 is disposed on the inner shaft 21, and a tension spring 12 is disposed between the rear lever swing link 32 and the mounting plate 11. The middle part of back lever pendulum rod 32 extends downwards and is formed with installation department 13, the top and the installation department 13 of axle sleeve 22 are through wearing to establish axle position screw two 14 hinged joint between them, the upper end setting of extension spring 12 is on installation department 13.
The working principle is as follows: the structure of the presser foot component of the presser foot lifting mechanism of the sewing machine and the structure of the connecting part of the presser foot lifting pull rod 4 and the presser foot component are not shown in the figure, the structure of the part is consistent with that of the existing sewing machine, when the presser foot component is driven to move upwards by the power source 1, firstly the power source 1 drives the inner shaft 21 of the presser foot lifting ejector rod 2 to move upwards, at the moment, the inner shaft 21 and the shaft sleeve 22 of the presser foot lifting ejector rod 2 do not move relatively (the shaft position screw II 14 on the shaft sleeve 22 can play a role of limiting the inner shaft 21), the length of the presser foot lifting ejector rod 2 is L1, then the presser foot lifting ejector rod 2 drives the rear lever swing rod 32 of the presser foot lifting rear lever 3 to swing upwards, then the rear lever swing rod 32 drives the rear lever swing fork 31 to swing downwards, the swung rear lever swing fork 31 drives the presser foot lifting front lever to swing upwards through the presser foot lifting pull rod 4, and finally the presser foot front lever drives the presser foot component to move upwards, in this way, the maximum height that the presser foot assembly can be lifted is H1; when the presser foot component is driven to move upwards through the knee control ejector rod 7, firstly, the knee control ejector rod 7 is driven to move upwards by hands or knees, then the knee control ejector rod 7 drives the rear lever swing fork 31 of the presser foot lifting rear lever 3 to swing downwards, the rear lever swing fork 31 drives the rear lever swing rod 32 to swing upwards, the rear lever swing rod 32 can drive the shaft sleeve 22 of the presser foot lifting ejector rod 2 to axially stretch relative to the inner shaft 21 after swinging, the length of the stretched presser foot lifting ejector rod 2 is L2, the knee control ejector rod 7 continues to drive the rear lever swing fork 31 to swing downwards, the swung rear lever swing fork 31 drives the presser foot lifting front lever to swing upwards through the presser foot lifting pull rod 4, because L2 is larger than L1, namely the length of the presser foot lifting ejector rod 2 is lengthened, the amplitude of the downward swinging of the rear lever swing fork 31 driven by the knee control ejector rod 7 is increased, and the amplitude of upward swinging of the presser foot lifting front lever is also increased through the presser foot pull rod 4 driven by the rear lever swing fork 31, thereby make and lift presser foot front lever drive presser foot subassembly maximum height H2 that can the uplift also be greater than H1, two motion processes mutually noninterfere of the mode of power supply drive presser foot subassembly uplift and the mode of driving presser foot subassembly uplift through knee accuse ejector pin simultaneously, thereby realized adjusting the effect of presser foot subassembly height according to the thickness of sewing cloth, make the sewing machine can change the lifting height of presser foot subassembly in a flexible way in order to satisfy different sewing demands, and make the user can choose for use arbitrary drive mode more conveniently.
The specific embodiments described herein are merely illustrative of the spirit of the utility model. 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 utility model as defined in the appended claims.
Claims (7)
1. The presser foot lifting mechanism of the sewing machine comprises a presser foot lifting ejector rod (2), a presser foot lifting rear lever (3) and a presser foot lifting pull rod (4) which are sequentially connected, and is characterized in that the presser foot lifting rear lever (3) is hinged with a knee control ejector rod (7), the presser foot lifting ejector rod (2) comprises an inner shaft (21) and a shaft sleeve (22) movably sleeved outside the inner shaft (21), the shaft sleeve (22) is connected with the presser foot lifting rear lever (3) and can axially extend and retract relative to the inner shaft (21), and the presser foot lifting rear lever (3) can be driven to swing up and down by driving the inner shaft (21) or the knee control ejector rod (7) to move upwards.
2. The presser foot lifting mechanism of the sewing machine as claimed in claim 1, wherein the presser foot lifting rear lever (3) comprises a rear lever swing fork (31) and a rear lever swing rod (32), a fork opening (9) is formed in the end portion of the rear lever swing fork (31) along the length direction of the rear lever swing fork, and the end portion of the rear lever swing rod (32) is movably clamped in the fork opening (9) through a first axial screw (8).
3. The presser foot lifting mechanism of sewing machine according to claim 2, wherein a mounting plate (11) is provided on the inner shaft (21), and a tension spring (12) is provided between the rear lever swing link (32) and the mounting plate (11).
4. The presser foot lifting mechanism of a sewing machine as claimed in claim 3, wherein the middle part of the rear lever swing link (32) extends downwards to form a mounting part (13), the top of the shaft sleeve (22) is hinged with the mounting part (13) through a second axial screw (14) penetrating through the shaft sleeve and the mounting part, and the upper end of the tension spring (12) is arranged on the mounting part (13).
5. The presser foot lifting mechanism of sewing machine according to claim 2, 3 or 4, characterized in that the rear lever swing fork (31) is L-shaped, the bending part of the rear lever swing fork (31) and the end part of the rear lever swing rod (32) far away from the fork opening (9) are respectively hinged with the machine shell (10) of sewing machine, the end part of the rear lever swing fork (31) far away from the fork opening (9) is hinged with the presser foot lifting pull rod (4), and the upper end of the knee control ejector rod (7) is hinged with the middle part of the rear lever swing fork (31).
6. The presser foot lifting mechanism of sewing machine according to claim 1 or 2 or 3 or 4, wherein said inner shaft (21) is drivingly connected to a power source (1).
7. The presser foot lifting mechanism of sewing machine according to claim 6, wherein the bottom of the inner shaft (21) is provided with a hinge portion (17), the power source (1) is a motor, a drive shaft of the motor is provided with a presser foot lifting drive plate (16), and the presser foot lifting drive plate (16) is hinged with the hinge portion (17).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220749381.3U CN216972843U (en) | 2022-04-01 | 2022-04-01 | Presser foot lifting mechanism of sewing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220749381.3U CN216972843U (en) | 2022-04-01 | 2022-04-01 | Presser foot lifting mechanism of sewing machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216972843U true CN216972843U (en) | 2022-07-15 |
Family
ID=82339627
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220749381.3U Active CN216972843U (en) | 2022-04-01 | 2022-04-01 | Presser foot lifting mechanism of sewing machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216972843U (en) |
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2022
- 2022-04-01 CN CN202220749381.3U patent/CN216972843U/en active Active
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