CN212983233U - Sewing machine and presser foot control device thereof - Google Patents
Sewing machine and presser foot control device thereof Download PDFInfo
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- CN212983233U CN212983233U CN202021716763.3U CN202021716763U CN212983233U CN 212983233 U CN212983233 U CN 212983233U CN 202021716763 U CN202021716763 U CN 202021716763U CN 212983233 U CN212983233 U CN 212983233U
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- 238000009958 sewing Methods 0.000 title claims abstract description 19
- 230000007246 mechanism Effects 0.000 claims abstract description 32
- 238000000034 method Methods 0.000 claims abstract description 6
- 230000005540 biological transmission Effects 0.000 claims description 45
- 230000008569 process Effects 0.000 claims description 4
- 230000006835 compression Effects 0.000 description 7
- 238000007906 compression Methods 0.000 description 7
- 239000004744 fabric Substances 0.000 description 6
- 230000009286 beneficial effect Effects 0.000 description 5
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
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Abstract
The application discloses a sewing machine and a presser foot control device thereof, wherein the presser foot control device comprises a pressing rod, a swinging rod, a driving mechanism and a sliding block, the pressing rod is provided with a convex block, a movable block, an elastic piece and a pressing rod guide frame which are sequentially distributed from top to bottom, the lower end of the elastic piece is connected or contacted with the pressing rod guide frame, and the movable block is provided with a sliding chute; the driving mechanism is connected with the first end of the swinging rod and drives the swinging rod to swing around the first end; the slider is connected with the second end fixed connection of swinging arms, and at the swinging arms swing in-process, the slider slides along the spout of movable block to make the movable block slide along compressing tightly the pole. The application provides a presser foot controlling means utilizes same actuating mechanism, realizes that the presser foot lifts height-adjustable and presser foot pressure is adjustable.
Description
Technical Field
The application relates to the technical field of sewing machines, in particular to a presser foot control device. In addition, the application still relates to a sewing machine including above-mentioned presser foot controlling means.
Background
At present, the pressure foot lifting and the pressure adjusting of the thick material machine are controlled by two different devices, the pressure adjusting needs manual adjustment, the operation is inconvenient, and the pressure foot lifting is controlled by utilizing an electromagnet.
In summary, how to realize two functions of lifting and adjusting the pressure of the presser foot through one driving mechanism is a problem to be solved urgently by those skilled in the art at present.
SUMMERY OF THE UTILITY MODEL
In view of the above, an object of the present invention is to provide a presser foot control apparatus, which can realize both height adjustment and presser foot pressure adjustment by using the same driving mechanism. Another object of the present application is to provide a sewing machine including the presser foot control apparatus described above.
In order to achieve the above purpose, the present application provides the following technical solutions:
a presser foot control device comprises a pressing rod with a small presser foot at the bottom, and further comprises a swing rod, a driving mechanism and a sliding block, wherein the pressing rod is provided with a convex block, a movable block, an elastic piece and a pressing rod guide frame which are sequentially distributed from top to bottom; the driving mechanism is connected with the first end of the swinging rod and drives the swinging rod to swing around the first end; the sliding block is fixedly connected with the second end of the swinging rod, and in the swinging process of the swinging rod, the sliding block slides along the sliding groove of the movable block so that the movable block slides along the pressing rod.
Optionally, the chute extends in a horizontal direction.
Optionally, the elastic part is a spring, and the spring is sleeved on the periphery of the pressing rod.
The optional protruding block is an upper fixing ring sleeved and fixed on the periphery of the pressing rod.
The optional presser foot control device further comprises a presser foot lifting sleeve shaft, the driving mechanism comprises a transmission shaft, the transmission shaft and the swinging rod are distributed in an L shape, and the transmission shaft is rotatably arranged inside the presser foot lifting sleeve shaft.
Optionally, the driving mechanism further comprises a motor and a transmission assembly, an input end of the transmission assembly is connected with a driving shaft of the motor, and an output end of the transmission assembly is connected with the transmission shaft.
Optionally, the transmission assembly comprises a motor crank, a motor connecting rod and a transmission crank, a driving shaft of the motor is connected with the front end of the motor crank, the front end and the tail end of the motor connecting rod are respectively connected with the tail end of the motor crank and the front end of the transmission crank, and the tail end of the transmission crank is connected with the transmission shaft.
A sewing machine comprises any one of the presser foot control devices.
Through above-mentioned scheme, the presser foot controlling means's that this application provided beneficial effect lies in:
the presser foot control device comprises a pressing rod, a swinging rod, a driving mechanism and a sliding block, wherein the pressing rod is provided with a convex block, a movable block, an elastic piece and a pressing rod guide frame which are sequentially distributed from top to bottom, and the movable block is provided with a sliding groove; the swing rod swings around the first end in the positive direction and the reverse direction under the control of the driving mechanism, and the second end of the swing rod is provided with a sliding block capable of sliding along the sliding groove of the movable block.
When the driving mechanism controls the swinging rod to swing in the forward direction, the sliding block moves along the sliding groove of the movable block and moves the movable block downwards, the movable block compresses the elastic piece, the elastic piece pushes the pressing rod guide frame to move downwards after being pressed, the pressing rod guide frame drives the pressing rod and the small pressing foot at the bottom to move downwards until the small pressing foot is contacted with the needle plate, and the pressing state is realized at the moment; when the swing rod continues to swing in the positive direction, the compression amount of the elastic member is increased, so that the acting force exerted on the pressing rod is increased, and the effect of increasing the pressure of the presser foot is achieved.
When the driving mechanism controls the swing rod to swing reversely, the sliding block moves along the sliding groove of the movable block and moves the movable block to move upwards, when the movable block moves to a certain degree, the movable block can be in contact with the protruding block, the swing rod continues to swing reversely and can drive the protruding block to move upwards, the protruding block can drive the pressing rod to move upwards, the presser foot can be lifted at the moment until the presser foot moves to the highest position, and the presser foot is lifted at the moment.
In addition, it should be understood that the sewing machine provided by the application comprises the presser foot control device, and therefore, the sewing machine provided by the application also has the beneficial effects.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, it is obvious that the drawings in the following description are only embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a presser foot control device provided in an embodiment of the present application;
fig. 2 is a schematic structural view of a first view angle of the presser foot control device assembled with other parts of the sewing machine according to the embodiment of the present application;
FIG. 3 is a cross-sectional view of a portion of the structure of FIG. 2;
fig. 4 is a schematic structural view of a second view angle of the presser foot control device assembled with other parts of the sewing machine according to the embodiment of the present application;
the reference numbers in the figures are:
the device comprises a motor 1, a motor mounting bracket 2, a motor crank 3, a first connecting pin 4, a motor connecting rod 5, a second connecting pin 6, a transmission crank 7, an eccentric connecting rod adjusting crank 8, a machine shell 9, a presser foot lifting front crank 10, a swinging rod 11, a swinging rod fixing pin 12, an elastic piece 13, a pressing rod guide frame 14, a pressing rod 15, a pressing rod lower shaft sleeve 16, a small presser foot 17, a needle plate 18, a presser foot lifting shaft 19, a presser foot lifting shaft sleeve 20, a protruding block 21, a movable block 22, a sliding block 23, a pressing rod upper shaft sleeve 24 and a transmission shaft 25.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Referring to fig. 1 to 4, the present application provides a presser foot control apparatus including a presser bar 15, a swing bar 11, a drive mechanism, and a slider 23.
The pressing rod 15 is a conventional part of the sewing machine, and the pressing rod 15 is pivotally mounted on the machine shell 9 of the sewing machine and can vertically lift. During actual assembly, a shaft sleeve can be arranged to connect the pressing rod 15 and the casing 9, for example, the pressing rod lower shaft sleeve 16 is fixed to the casing 9, the pressing rod upper shaft sleeve 24 is fixed to the casing 9, the pressing rod lower shaft sleeve 16 and the pressing rod upper shaft sleeve 24 are respectively in clearance fit with the pressing rod 15, and the pressing rod 15 can slide up and down in the pressing rod lower shaft sleeve 16 and the pressing rod upper shaft sleeve 24.
The pressing rod 15 is provided with a convex block 21, a movable block 22, an elastic piece 13, a pressing rod guide frame 14 and a small pressing foot 17 which are sequentially distributed from top to bottom.
The protruding block 21 is used for propping against the movable block 22 when the movable block 22 slides in place, so as to be pushed by the movable block 22 to move upwards, the protruding block 21 can be any protruding structure protruding out of the surface of the pressing rod 15, and preferably, the protruding block 21 is fixed on an upper fixing ring at the periphery of the pressing rod 15 by adopting a sleeve.
The periphery that compresses tightly pole 15 is located to the movable block 22 cover to there is the clearance between movable block 22 and the pole 15 that compresses tightly, makes movable block 22 can slide from top to bottom along compressing tightly pole 15. Be equipped with the spout on the movable block 22, the spout is in order to cooperate with slider 23 to convert slider 23 into the linear motion of movable block 22 around the swing of the first end of swinging arms 11, consequently, the spout is preferred to be followed the horizontal direction and is extended, and the spout also can have the contained angle with the horizontal direction, and the contained angle should not adopt 90 degrees, and the spout should not extend along vertical direction promptly.
The lower end of the elastic member 13 is connected to or in contact with the pressing bar guide 14. The elastic member 13 may be a rubber sleeve or other elastic member, and the elastic member 13 functions such that when the elastic member 13 is pressed by the movable block 22, the elastic member 13 pushes the pressing rod guide 14 downward by its own elasticity. Preferably, the elastic member 13 is a spring, and the spring is sleeved on the outer periphery of the pressing rod 15.
The pressing bar guide 14 is fixed to the pressing bar 15. The top of the pressing rod guide frame 14 can be abutted against the bottom of the elastic piece 13, and the lower end of the elastic piece 13 can also be extended into the space between the pressing rod guide frame 14 and the pressing rod 15 to fix the elastic piece 13. In order to avoid the rotation of the compression bar 15 around its own axis, a limiting structure may be provided on the compression bar guide 14, and of course, a limiting structure for limiting the rotation of the compression bar 15 may also be provided in the compression bar lower bushing 16 and/or the compression bar upper bushing 24.
The first end of the oscillating rod 11 is fixedly connected with the driving mechanism, and the second end of the oscillating rod 11 is fixedly connected with the sliding block 23. In the actual connection, the swing lever 11 may be fixed to the swing lever fixing pin 12, and the swing lever fixing pin 12 may be in clearance fit with the slider 23. The swing lever 11 can swing clockwise and counterclockwise, and during the swing of the swing lever 11, the slider 23 slides along the slide groove of the movable block 22, so that the movable block 22 slides along the pressing lever 15.
The driving mechanism is connected to the first end of the swing lever 11, and drives the swing lever 11 to swing around the first end. There are many options for the construction of the drive mechanism.
For example, the driving mechanism includes a transmission shaft 25, the transmission shaft 25 and the swing lever 11 are distributed in an L shape, the transmission shaft 25 and the swing lever 11 can be manufactured by integral molding, or can be fixed by a mechanical structure, and when swinging, the swing lever 11 swings around the axis of the transmission shaft 25.
For another example, the driving mechanism further comprises a motor 1 and a transmission assembly, wherein the input end of the transmission assembly is connected with the driving shaft of the motor 1, and the output end of the transmission assembly is connected with the transmission shaft 25. The motor 1 can specifically adopt a stepping motor, and the motor 1 is fixed on the machine shell 9 through the motor mounting bracket 2. The transmission assembly performs a transmission function, and transmits the torque output by the motor 1 to the transmission shaft 25.
For another example, the drive assembly includes a motor crank 3, a motor link 5, and a drive crank 7. The driving shaft of the motor 1 is connected with the front end of the motor crank 3, the tail end of the motor crank 3 is fixedly connected with the front end of the motor connecting rod 5 through a first connecting pin 4 or other mechanical structures, the tail end of the motor connecting rod 5 is fixedly connected with the front end of the transmission crank 7 through a second connecting pin 6 or other mechanical structures, and the tail end of the transmission crank 7 is connected with the transmission shaft 25. Specifically, considering that the torque of the motor 1 may not be enough to drive the transmission shaft 25 and the oscillating rod 11 to oscillate, a crank-link structure may be adopted to increase the torque of the motor 1.
Optionally, in an embodiment provided by the present application, the presser foot control device further includes a presser foot lifting sleeve shaft 20, and the transmission shaft 25 is rotatably disposed inside the presser foot lifting sleeve shaft 20. Specifically, the transmission crank 7 is fixed with the transmission shaft 25, the transmission shaft 25 is in clearance fit with the presser foot lifting sleeve shaft 20, the presser foot lifting sleeve shaft 20 and the presser foot lifting sleeve shaft 20 can rotate relatively, the presser foot lifting sleeve shaft 20 and the swing presser foot lifting shaft 19 are in clearance fit and can also rotate relatively, and the swing presser foot lifting shaft 19 is fixed with the machine shell 9. The two ends of the presser foot lifting sleeve shaft 20 are provided with an eccentric connecting rod adjusting crank 8 and a presser foot lifting front crank 10, and the eccentric connecting rod adjusting crank 8 can be connected with a pressing rod guide frame 14 through a connecting rod mechanism, so that the presser foot can be lifted up and down once every time one stitch is sewn. The working principle of the presser foot lifting sleeve shaft 20 can be referred to the prior art.
Optionally, in an embodiment provided by the present application, the presser foot control device further includes a thickness sensor and a controller, and the thickness sensor and the driving mechanism are electrically connected to the controller respectively. More specifically, the thickness sensor detects the current thickness of the cloth and sends the current thickness to the controller; the controller can prestore the corresponding relation of cloth thickness and presser foot pressure, and cloth thickness is positive correlation with presser foot pressure, and the controller acquires the current thickness of cloth through thin thick inductor, and generates the presser foot pressure information that corresponds with current thickness, and the controller sends presser foot pressure information to actuating mechanism, and actuating mechanism adjusts presser foot pressure according to presser foot pressure information. In the working process, when the thickness sensor detects that the cloth becomes thick, the controller controls the driving mechanism to adjust the pressure of the presser foot, so that the pressure of the presser foot is increased, the sewing is smoother, and the stitch is more attractive; on the contrary, when the thickness sensor detects that the cloth becomes thinner, the controller controls the driving mechanism to adjust the pressure of the presser foot to be smaller.
The working principle of the presser foot control device with the structure is as follows:
as shown in fig. 2, at this time, the presser foot is in a raised state, and taking the angle shown in fig. 2 as an example, when the motor 1 rotates clockwise, the motor crank 3 is driven to move clockwise, the motor crank 3 drives the motor connecting rod 5 to move rightward, and the motor connecting rod 5 drives the transmission crank 7 to rotate clockwise; as can be seen from fig. 3, the transmission crank 7 rotates clockwise to drive the transmission shaft 25 to rotate, and further drive the swing rod 11 to rotate; it can be known from fig. 4 that the swing rod 11 rotates clockwise to drive the swing rod fixing pin 12 to rotate clockwise, the swing rod fixing pin 12 rotates clockwise to drive the sliding block 23 to swing, and then drive the movable block 22 to move downward, when the movable block 22 moves to a certain extent and contacts with the elastic part 13, the elastic part 13 continues to move downward and compresses the elastic part 13, the elastic part 13 is compressed to push the hold-down rod guide frame 14 to move downward, because the hold-down rod guide frame 14 is fixed with the hold-down rod 15, the hold-down rod 15 can be driven to move downward until the small hold-down foot 17 contacts with the needle plate 18, at this time, the pressure state is the pressure foot state, when the swing rod 11 continues to move clockwise, the compression amount of the elastic part 13 can be increased, thereby increasing the force applied on the hold-down rod 15, and achieving the adjusting.
When the presser foot needs to be lifted, the motor 1 rotates anticlockwise, the swing rod 11 can also rotate anticlockwise in the process, the movable block 22 can be driven to move upwards, when the movable block 22 moves to a certain degree, the movable block 22 can be in contact with the protruding block 21, the swing rod 11 can drive the protruding block 21 to move upwards by continuing to move anticlockwise, the protruding block 21 can drive the pressing rod 15 to move upwards, at the moment, the small presser foot 17 can be lifted until the presser foot moves to the highest position, and at the moment, the presser foot is in a lifting state.
As can be seen from the above embodiments, the presser foot control device provided by the present application has the following beneficial effects:
this application has realized through a actuating mechanism that presser foot pressure is adjustable and the presser foot lifts the function with adjustable height, when actuating mechanism adopted motor 1, can utilize the rotation of 1 one direction of motor to realize lifting the presser foot, utilizes the rotation of 1 another direction of motor to realize that presser foot pressure is adjustable. And can also combine with thickness inductor and automatically controlled, when sensing the stalk, adjustable presser foot pressure makes the stalk of crossing lighter, and the seam mark is more pleasing to the eye. In addition, in a further embodiment, a hollow structure of the presser foot lifting sleeve shaft 20 is adopted, so that the normal work of the original mechanical presser foot alternative quantity structure is ensured, the work of the presser foot lifting and presser foot pressure adjusting mechanism with a new structure can be realized, the existing space is fully utilized, and the problem that the assembly cannot be carried out due to the complex structure is solved.
The application also provides a sewing machine, and this sewing machine includes above-mentioned arbitrary presser foot controlling means, and this sewing machine's beneficial effect is unanimous with presser foot controlling means's beneficial effect, and the structure of other each parts of this sewing machine please refer to prior art, and this text is no longer repeated.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The presser foot control device provided by the present application is described in detail above. The principles and embodiments of the present application are explained herein using specific examples, which are provided only to help understand the method and the core idea of the present application. It should be noted that, for those skilled in the art, it is possible to make several improvements and modifications to the present application without departing from the principle of the present application, and such improvements and modifications also fall within the scope of the claims of the present application.
Claims (8)
1. A presser foot control device comprises a pressing rod (15) with a small presser foot (17) arranged at the bottom, and is characterized by further comprising a swing rod (11), a driving mechanism and a sliding block (23), wherein the pressing rod (15) is provided with a protruding block (21), a movable block (22), an elastic piece (13) and a pressing rod guide frame (14) which are sequentially distributed from top to bottom, the lower end of the elastic piece (13) is connected or contacted with the pressing rod guide frame (14), and the movable block (22) is provided with a sliding groove; the driving mechanism is connected with the first end of the swinging rod (11) and drives the swinging rod (11) to swing around the first end; the sliding block (23) is fixedly connected with the second end of the swinging rod (11), and in the swinging process of the swinging rod (11), the sliding block (23) slides along the sliding groove of the movable block (22) so that the movable block (22) slides along the pressing rod (15).
2. The presser foot control apparatus of claim 1, wherein the chute extends in a horizontal direction.
3. Presser foot control arrangement according to claim 1, characterized in that the resilient member (13) is a spring, which is arranged around the outer circumference of the presser bar (15).
4. Presser foot control arrangement according to claim 1, characterized in that the raised block (21) is an upper retainer ring which is fixedly mounted around the outer circumference of the presser bar (15).
5. Presser foot control arrangement according to any one of claims 1 to 4, further comprising a presser foot lift sleeve shaft (20), wherein the drive mechanism comprises a drive shaft (25), wherein the drive shaft (25) and the swing lever (11) are arranged in an L-shape, and wherein the drive shaft (25) is rotatably arranged inside the presser foot lift sleeve shaft (20).
6. Presser foot control device according to claim 5, wherein the drive mechanism further comprises a motor (1) and a transmission assembly, the input end of the transmission assembly is connected to the drive shaft of the motor (1), and the output end of the transmission assembly is connected to the transmission shaft (25).
7. Presser foot control arrangement according to claim 6, wherein said transmission assembly comprises a motor crank (3), a motor connecting rod (5) and a transmission crank (7), a driving shaft of said motor (1) is connected to a front end of said motor crank (3), a front end and a rear end of said motor connecting rod (5) are respectively connected to a rear end of said motor crank (3) and a front end of said transmission crank (7), and a rear end of said transmission crank (7) is connected to said transmission shaft (25).
8. A sewing machine characterized by comprising the presser foot control device of any one of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021716763.3U CN212983233U (en) | 2020-08-17 | 2020-08-17 | Sewing machine and presser foot control device thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021716763.3U CN212983233U (en) | 2020-08-17 | 2020-08-17 | Sewing machine and presser foot control device thereof |
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| Publication Number | Publication Date |
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| CN212983233U true CN212983233U (en) | 2021-04-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202021716763.3U Active CN212983233U (en) | 2020-08-17 | 2020-08-17 | Sewing machine and presser foot control device thereof |
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| CN (1) | CN212983233U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116695343A (en) * | 2022-02-25 | 2023-09-05 | 高林股份有限公司 | Sensing type presser foot device of sewing machine |
-
2020
- 2020-08-17 CN CN202021716763.3U patent/CN212983233U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116695343A (en) * | 2022-02-25 | 2023-09-05 | 高林股份有限公司 | Sensing type presser foot device of sewing machine |
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