CN110629413A - Sewing machine presser foot mechanism and sewing machine with same - Google Patents

Abstract

The invention provides a sewing machine presser foot mechanism and a sewing machine with the same. This sewing machine presser foot mechanism includes presser bar somatic part, guide pillar, slider and actuating mechanism, and presser bar somatic part has operating position and lets the position, and the slider movably sets up on the guide pillar, has seted up on the slider and lets the position portion, and in the presser bar somatic part was worn to locate and lets the position portion, the inner peripheral surface that at least part lets the position portion had the distance ground setting with the outer peripheral face of presser bar somatic part. Through with slider movably setting on the guide pillar, seted up on the slider and let position portion, wear to locate in letting position portion with presser bar somatic part, and let the inner peripheral surface of position portion and the outer peripheral face of presser bar somatic part have a distance, actuating mechanism drive slider is along the axial displacement of guide pillar for presser bar somatic part is located operating position, sets up like this and has increased the clearance between the outer peripheral face of the inner peripheral surface of letting position portion and presser bar somatic part, has avoided the friction between slider and the presser bar somatic part.

Description

Sewing machine presser foot mechanism and sewing machine with same

Technical Field

The invention relates to the technical field of sewing machine equipment, in particular to a presser foot mechanism of a sewing machine and the sewing machine with the presser foot mechanism.

Background

Among the prior art, the regulation of presser foot dynamics mainly adopts artifical manual regulation, and adjust through the pressure regulating nut who establishes in sewing machine casing top, there is the scale suggestion on the pressure regulating nut, however, though there is the scale suggestion, still higher to operation workman's technical requirement, and still need accomplish according to operation workman's experience among the in-service use process, consequently in concrete use inconvenient even, the regulation precision of presser foot dynamics is not high yet, and there is the friction between guide bar and the slider, user stability in use is poor.

Disclosure of Invention

The invention mainly aims to provide a presser foot mechanism of a sewing machine and the sewing machine with the presser foot mechanism, so as to solve the problem that in the prior art, friction exists between a guide rod and a sliding component, so that the use stability of a user is poor.

In order to achieve the above object, according to one aspect of the present invention, there is provided a presser foot mechanism for a sewing machine, comprising: the foot pressing rod body is provided with a working position and a yielding position; the guide post is connected with the presser foot rod body; the slide block is movably arranged on the guide post, a relief part is arranged on the slide block, the pressure pin rod body part is arranged in the relief part in a penetrating way, and the inner peripheral surface of the relief part and the outer peripheral surface of the pressure pin rod body part are arranged at a distance; and the driving mechanism is abutted against the sliding block and can be used for driving the sliding block to move along the axial direction of the guide pillar so as to enable the pressure pin rod body to be positioned at a working position, or the driving mechanism is used for driving the pressure pin rod body to be positioned at a yielding position.

Further, the presser foot mechanism of the sewing machine further comprises: the first limiting block and the second limiting block are arranged on the presser bar body at intervals, the slider is arranged between the first limiting block and the second limiting block, the guide pillar is connected with the first limiting block, the driving mechanism is abutted to the upper end face of the slider, and the driving mechanism can drive the first limiting block upwards along the axis direction of the guide pillar so that the first limiting block drives the presser bar body to move relative to the guide pillar and be located at a yielding position.

Furthermore, let the position portion be the recess, presser bar somatic part wears to locate in the recess through the notch of recess.

Further, the presser foot mechanism of the sewing machine further comprises: and the reset spring is arranged on the presser bar body and is positioned between the second limiting block and the lower end face of the sliding block.

Further, the guide pillar includes: the first end of the rod body part is movably connected with the first limiting block, the second end of the rod body part is connected with the base, the second end of the rod body part is provided with the third limiting block, and the sliding block is movably sleeved on the rod body part and located between the first limiting block and the third limiting block.

Further, the slider includes: the sliding block body is movably arranged on the guide pillar in a penetrating way; the supporting table is connected with the outer surface of the sliding block body, and the driving mechanism is abutted against the table surface of the supporting table; and the pressing block is connected with the sliding block body and is provided with a groove.

Further, the drive mechanism includes: a drive section; and the first end of the crank connecting rod mechanism is connected with the output shaft of the driving part, and the second end of the crank connecting rod mechanism is abutted against the sliding block.

Further, the crank link mechanism includes: the first end of the connecting rod is connected with the output shaft of the driving part; the first end of the swinging piece is hinged with the second end of the connecting rod, the second end of the swinging piece is abutted against the sliding block, the swinging piece is of a V-shaped structure, the middle part of the swinging piece is movably connected with the base through the connecting piece, and the driving part can drive the connecting rod to drive the swinging piece to be rotatably arranged around the connecting piece.

Further, the driving part is a stepping motor.

Further, the surface of the second end of the swinging piece, which is abutted to the sliding block, is an arc surface.

Furthermore, the yielding part is a through hole formed in the middle of the sliding block, and the hole wall of the through hole is arranged at a distance from the peripheral surface of the presser bar body.

According to another aspect of the invention, a sewing machine is provided, which comprises a sewing machine presser foot mechanism, wherein the sewing machine presser foot mechanism is the sewing machine presser foot mechanism.

By applying the technical scheme of the invention, the slide block is movably arranged on the guide column, the slide block is provided with the position-giving part, the pressure pin rod body part is arranged in the position-giving part in a penetrating way, the inner peripheral surface of the position-giving part is separated from the outer peripheral surface of the pressure pin rod body part, and the drive mechanism drives the slide block to move along the axial direction of the guide column, so that the pressure pin rod body part is positioned at the working position, the arrangement increases the gap between the inner peripheral surface of the position-giving part and the outer peripheral surface of the pressure pin rod body part, and the friction between the slide block and the pressure pin rod body part is.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:

FIG. 1 shows a first view structural schematic of an embodiment of a presser foot mechanism of a sewing machine according to the present invention;

FIG. 2 shows a second view structural schematic of an embodiment of a presser foot mechanism of a sewing machine according to the present invention;

fig. 3 shows a third view angle schematic diagram of the embodiment of the sewing machine presser foot mechanism according to the invention.

Wherein the figures include the following reference numerals:

10. a presser bar body; 11. a first stopper; 12. a second limiting block;

20. a guide post; 21. a guide post rod portion; 22. a third limiting block;

30. a slider; 31. a slider body; 32. a support table; 33. briquetting; 331. a groove;

40. a return spring;

50. a drive mechanism; 51. a drive section; 52. a crank link mechanism; 521. a connecting rod; 522. an oscillating member.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

Exemplary embodiments according to the present application will now be described in more detail with reference to the accompanying drawings. These exemplary embodiments may, however, be embodied in many different forms and should not be construed as limited to only the embodiments set forth herein. It is to be understood that these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art, in the drawings, it is possible to enlarge the thicknesses of layers and regions for clarity, and the same devices are denoted by the same reference numerals, and thus the description thereof will be omitted.

Referring to fig. 1 to 3, according to an embodiment of the present invention, a presser foot mechanism of a sewing machine is provided.

Specifically, as shown in fig. 1, the presser foot mechanism of the sewing machine includes a presser foot bar body 10, a guide post 20, a slider 30 and a driving mechanism 50, wherein the presser foot bar body 10 has a working position and a yielding position, the guide post 20 is connected to the presser foot bar body 10, the slider 30 is movably disposed on the guide post 20, the slider 30 is provided with a yielding portion, the presser foot bar body 10 is disposed in the yielding portion in a penetrating manner, an inner peripheral surface of the yielding portion is disposed at a distance from an outer peripheral surface of the presser foot bar body 10, the driving mechanism 50 is abutted against the slider 30, and the driving mechanism 50 can be used for driving the slider 30 to move axially along the guide post 20, so that the presser foot bar body 10 is located at the working position, or the driving mechanism 50 is used for driving the presser foot bar body 10 to be located at the yielding position.

In this embodiment, through with slider movably setting on the guide pillar, seted up on the slider and let the position portion, wear to locate in letting the position portion with the presser bar body, and let the inner peripheral surface of position portion and the outer peripheral face of presser bar body have the distance, actuating mechanism drive slider is along the axial displacement of guide pillar for presser bar body is located operating position, sets up the clearance between the outer peripheral face that has increased the inner peripheral surface of letting the position portion and presser bar body like this, has avoided the friction between slider and the presser bar body.

As shown in fig. 2, the presser foot mechanism of the sewing machine further includes a first stopper 11 and a second stopper 12, the first stopper 11 and the second stopper 12 are disposed on the presser foot rod body 10 at intervals, the slider 30 is disposed between the first stopper 11 and the second stopper 12, the guide pillar 20 is connected to the first stopper 11, the driving mechanism 50 abuts against an upper end face of the slider 30, and the driving mechanism 50 can drive the first stopper 11 upward along an axial direction of the guide pillar 20 so that the first stopper 11 drives the presser foot rod body 10 to move relative to the guide pillar 20 and to be located at the abdicating position. The first limit block 11 and the second limit block 12 are arranged on the presser bar body 10 at intervals, the first limit block 11 is used for arranging a limit hole, the circumferential movement of the guide column bar body is limited through the limit hole, the second limit block 12 is used for supporting the return spring 40, and the sliding block 30 is arranged between the first limit block 11 and the second limit block 12 in a sliding manner.

In the embodiment, the positioning portion is a groove 331, and the presser bar body 10 is inserted into the groove 331 through the notch of the groove 331. Through with slider movably setting on the guide pillar, seted up the recess on the slider, wear to locate the recess with the notch of presser bar somatic part through the recess in, set up like this and increased the clearance of recess with presser bar somatic part, avoided the friction between recess inner wall and the presser bar somatic part.

In this embodiment, the presser foot mechanism of the sewing machine further includes a return spring 40, and the return spring 40 is disposed on the presser bar body 10 and between the second stopper 12 and the lower end surface of the slider 30. The slider is through exerting pressure to reset spring 40 for reset spring 40 takes place deformation, and then reset spring 40 exerts decurrent pressure to presser foot lever portion 10 through second stopper 12, so as to reach the effect that compresses tightly of presser foot to the cloth.

As shown in fig. 3, the guide post 20 includes a guide post body 21, a first end of the guide post body 21 is movably connected to the first stopper 11, a second end of the guide post body 21 is connected to the base, a third stopper 22 is disposed at the second end of the guide post body 21, and the slider 30 is movably sleeved on the guide post body 21 and located between the first stopper 11 and the third stopper 22. Wherein, the third stopper links firmly on the base, and the equal movably cover of slider 30 and first stopper 11 has been located on guide post somatic part 21, has set up like this and has guaranteed the straightness that hangs down between each part, has improved sewing machine presser foot mechanism's stability.

In this embodiment, the slider 30 includes a slider body 31, a supporting platform 32 and a pressing block 33, the slider body 31 is movably disposed on the guide post 20, the supporting platform 32 is connected to the outer surface of the slider body 31, the driving mechanism 50 is abutted to the top surface of the supporting platform 32, the pressing block 33 is connected to the slider body 31, and the pressing block 33 is provided with a groove 331. The support table 32 has a support surface, and the driving mechanism 50 drives the support surface to slide the slider body, so that the pressing block applies pressure to the return spring 40, thereby achieving the pressing effect of the pressing block on the cloth.

The driving mechanism 50 includes a driving portion 51 and a crank mechanism 52, a first end of the crank mechanism 52 is connected to an output shaft of the driving portion 51, and a second end of the crank mechanism 52 is in contact with the slider 30. The driving part drives the sliding block to move along the axis direction of the sliding block through the crank connecting rod mechanism, so that the pressing block applies pressure to the return spring 40, and the pressing effect of the pressing foot on the cloth is achieved.

As shown in fig. 3, the crank-link mechanism 52 includes a connecting rod 521 and a swinging member 522, a first end of the connecting rod 521 is connected to an output shaft of the driving portion 51, a first end of the swinging member 522 is hinged to a second end of the connecting rod 521, a second end of the swinging member 522 is abutted to the slider 30, the swinging member 522 is in a V-shaped structure, a middle portion of the swinging member 522 is movably connected to the base through a connecting member, and the driving portion 51 can drive the connecting rod 521 to drive the swinging member 522 to be rotatably disposed around the connecting member. The driving part drives the connecting rod 521, the driving connecting rod 521 drives the swinging piece 522 to rotate, the second end of the swinging piece 522 slides on the sliding block, the second end of the swinging piece 522 does circular motion around the connecting piece, the sliding block correspondingly moves along the axis of the guide post body part 21, and then the sliding block applies pressure to the return spring 40, so that the pressing effect of the presser foot on the cloth is achieved.

The driving unit 51 is a stepping motor. The sewing machine presser foot mechanism further comprises a control module, the control module is electrically connected with the stepping motor, and the control module is used for controlling the steering and rotating angle of an output shaft of the stepping motor.

In the present embodiment, the surface of the second end of the swinging member 522 abutting against the slider 30 is a curved surface. This arrangement facilitates the arcuate movement of the second end of the oscillating member 522 and allows the slider 30 to slide on the post body portion.

In the present embodiment, the positioning portion is a through hole formed in the middle of the slider 30, and the hole wall of the through hole is spaced from the outer peripheral surface of the presser bar body 10. The through hole is formed in the middle of the sliding block 30, so that the circumferential displacement of the sliding block is effectively limited, and the hole wall of the through hole is arranged at a distance from the outer peripheral surface of the presser bar body 10, so that friction between the sliding block and the presser bar body is avoided.

The presser foot mechanism of the sewing machine of the above embodiment can also be used in the technical field of sewing machine equipment, namely, according to another aspect of the invention, a sewing machine is provided. The sewing machine comprises a sewing machine presser foot mechanism, and the sewing machine presser foot mechanism is the sewing machine presser foot mechanism in the embodiment.

In addition to the foregoing, it should be noted that reference throughout this specification to "one embodiment," "another embodiment," "an embodiment," or the like, means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment described generally throughout this application. The appearances of the same phrase in various places in the specification are not necessarily all referring to the same embodiment. Further, when a particular feature, structure, or characteristic is described in connection with any embodiment, it is submitted that it is within the scope of the invention to effect such feature, structure, or characteristic in connection with other embodiments.

In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (12)

1. A presser foot mechanism for sewing machines, comprising:

the foot pressing rod body part (10), the foot pressing rod body part (10) is provided with a working position and a yielding position;

a guide post (20), wherein the guide post (20) is connected with the presser foot rod body (10);

the sliding block (30) is movably arranged on the guide post (20), a relief part is arranged on the sliding block (30), the presser bar body part (10) penetrates through the relief part, and at least part of the inner peripheral surface of the relief part is arranged at a distance from the outer peripheral surface of the presser bar body part (10);

the driving mechanism (50) is abutted to the sliding block (30), and the driving mechanism (50) can be used for driving the sliding block (30) to move along the axial direction of the guide post (20) so as to enable the presser bar body (10) to be located at the working position, or the driving mechanism (50) is used for driving the presser bar body (10) to be located at the abdicating position.

2. The sewing machine presser foot mechanism of claim 1, further comprising:

the first limiting block (11) and the second limiting block (12), the first limiting block (11) and the second limiting block (12) are arranged on the presser bar body (10) at intervals, the slider (30) is arranged between the first limiting block (11) and the second limiting block (12), the guide post (20) is connected with the first limiting block (11), the driving mechanism (50) is abutted to the upper end face of the slider (30), and the driving mechanism (50) can drive the first limiting block (11) upwards along the axis direction of the guide post (20) so that the first limiting block (11) drives the presser bar body (10) to move relative to the guide post (20) and is located at the abdicating position.

3. The presser foot mechanism of claim 1, wherein said relief portion is a notch (331), and said presser bar body (10) is inserted into said notch (331) through a notch of said notch (331).

4. The sewing machine presser foot mechanism of claim 2, further comprising:

the return spring (40) is arranged on the presser bar body (10) and is positioned between the second limiting block (12) and the lower end face of the sliding block (30).

5. The sewing machine presser foot mechanism according to claim 2, wherein the guide post (20) comprises:

the guide post comprises a guide post body part (21), wherein a first end of the guide post body part (21) is movably connected with a first limiting block (11), a second end of the guide post body part (21) is connected with the base, a third limiting block (22) is arranged at the second end of the guide post body part (21), and a sliding block (30) is movably sleeved on the guide post body part (21) and located between the first limiting block (11) and the third limiting block (22).

6. The sewing machine presser foot mechanism according to claim 3, wherein said slider (30) comprises:

the sliding block body (31), the sliding block body (31) can movably penetrate through the guide pillar (20);

the supporting table (32), the supporting table (32) is connected with the outer surface of the sliding block body (31), and the driving mechanism (50) is abutted against the table top of the supporting table (32);

the pressing block (33), the pressing block (33) is connected with the sliding block body (31), and the groove (331) is formed in the pressing block (33).

7. The sewing machine presser foot mechanism according to claim 1, wherein the drive mechanism (50) comprises:

a drive unit (51);

and a crank connecting rod mechanism (52), wherein the first end of the crank connecting rod mechanism (52) is connected with the output shaft of the driving part (51), and the second end of the crank connecting rod mechanism (52) is abutted against the sliding block (30).

8. The sewing machine presser foot mechanism according to claim 7, wherein the crank link mechanism (52) comprises:

a link (521), wherein a first end of the link (521) is connected with an output shaft of the driving part (51);

the first end of the swinging piece (522) is hinged to the second end of the connecting rod (521), the second end of the swinging piece (522) is abutted to the sliding block (30), the swinging piece (522) is of a V-shaped structure, the middle of the swinging piece (522) is movably connected with the base through the connecting piece, and the driving part (51) can drive the connecting rod (521) to drive the swinging piece (522) to be rotatably arranged around the connecting piece.

9. The presser foot mechanism of claim 7, wherein said drive section (51) is a stepping motor.

10. The sewing machine presser foot mechanism of claim 8, wherein the surface of the second end of the oscillating member (522) abutting the slider (30) is an arcuate surface.

11. The presser foot mechanism of a sewing machine according to claim 1, wherein said relief portion is a through hole provided in a middle portion of said slider (30), and a hole wall of said through hole is provided at a distance from an outer peripheral surface of said presser bar body portion (10).

12. A sewing machine comprising a sewing machine presser foot mechanism, characterized in that the sewing machine presser foot mechanism is the sewing machine presser foot mechanism of any one of claims 1 to 11.