Composite presser foot bottom plate, composite presser foot and sewing machine

Abstract

The utility model discloses a compound form presser foot bottom plate, compound presser foot and sewing machine in the technical field of sewing machine, presser foot bottom plate includes plate body portion and main lubrication portion, the working face of plate body portion is formed with the main accommodation groove of opening downward, the main lubrication portion is installed in the main accommodation groove, plate body portion surrounds the peripheral side of the main lubrication portion, the main lubrication portion is installed in the main accommodation groove, and the main lubrication portion is installed in the main accommodation groove. And the lower surface of the main lubricating part is coplanar with the working surface of the plate body part. According to the presser foot bottom plate, smooth fabric feeding is guaranteed, abrasion of the main lubricating part is reduced, the production cost is reduced, the stability of attachment connection of the main lubricating part and the plate body part is improved, and the side face of the main lubricating part can be prevented from being flanged.

Description

Technical Field

[0001] The utility model relates to the technical field of sewing machines, in particular to a composite presser foot sole plate, a composite presser foot and a sewing machine. Background Art

[0002] When garment factories solve the problem of misaligned fabrics or fabric not being able to move, there are two ways to deal with it. The first is to stick a presser foot leather on the working surface of the presser foot. The presser foot leather is generally made of Teflon material, but the presser foot leather is not wear-resistant and needs to be replaced regularly, which not only affects the production rhythm, but also leads to an increase in production costs. The second is to install a differential machine to ensure smooth fabric feeding, but the differential machine is not only expensive, but also less adaptable to fabrics than ordinary machines. Utility Model Content

[0003] In view of this, the purpose of the utility model is to provide a composite presser foot base plate to solve the technical problem of poor material feeding in the existing presser foot.

[0004] The technical solution adopted by the utility model is: a composite presser foot sole plate, the presser foot sole plate comprises a plate body portion and a main lubrication portion, a main accommodating groove with a downward opening is formed on the working surface of the plate body portion, the main lubrication portion is installed in the main accommodating groove, the plate body portion surrounds the circumference of the main lubrication portion, and the lower surface of the main lubrication portion is coplanar with the working surface of the plate body portion.

[0005] Preferably, a guide portion is formed at the front end and / or the rear end of the plate body, a downwardly opening auxiliary accommodating groove is formed on the guide surface of the guide portion, an auxiliary lubrication portion is installed in the auxiliary accommodating groove, the guide portion surrounds the auxiliary lubrication portion, and the lower surface of the auxiliary lubrication portion is coplanar with the guide surface of the guide portion.

[0006] Preferably, a plurality of attachment bosses are formed in the auxiliary accommodating groove, the upper end surfaces of the attachment bosses are fixedly connected to the guide portion, and the lower end surfaces of the attachment bosses are coplanar with the guide surface of the guide portion.

[0007] Preferably, the main lubrication portion is injection molded in the main accommodating groove, and the auxiliary lubrication portion is injection molded in the auxiliary accommodating groove.

[0008] Preferably, the main lubrication part and the auxiliary lubrication part are made of Teflon, copper or graphite.

[0009] Preferably, a plurality of contact bosses are formed in the main accommodating groove, the upper end surfaces of the contact bosses are fixedly connected to the plate body, and the lower end surfaces of the contact bosses are coplanar with the working surface of the plate body.

[0010] Preferably, the main lubrication portion and the contact bosses are alternately distributed along the transverse direction and / or the longitudinal direction.

[0011] Preferably, in the transverse direction and / or longitudinal direction, the inner wall surface of the main accommodating groove has a plurality of peaks and troughs for increasing the contact area between the main lubrication portion and the plate body portion.

[0012] The second purpose of the utility model is to provide a composite presser foot, comprising the above-mentioned presser foot base plate, presser foot handle and spring, the presser foot handle being arranged in the vertical direction, the presser foot base plate being arranged directly below the presser foot handle in the transverse direction, the bottom end of the presser foot handle being rotatably connected to the presser foot base plate through a presser foot pin, the spring being arranged on one lateral side of the presser foot pin, and the spring being installed between the presser foot handle and the presser foot base plate in the vertical direction.

[0013] The third purpose of the present utility model is to provide a sewing machine, which includes the above-mentioned composite presser foot.

[0014] Beneficial effects of the utility model:

[0015] The utility model has a main lubrication part installed in the main accommodating groove of the plate body, and the lower surface of the main lubrication part is coplanar with the working surface of the plate body. During the sewing process, the main lubrication part and the plate body can contact with the fabric at the same time. The plate body has better wear resistance when contacting with the fabric, and the main lubrication part has better lubrication performance when contacting with the fabric, so that the presser foot bottom plate has both wear resistance and lubrication performance, which not only ensures smooth fabric feeding, but also reduces the wear of the main lubrication part and reduces the production cost; at the same time, when the plate body contacts with the feed dog during empty seams and after sewing, it has better wear resistance.

[0016] The utility model surrounds the plate body part at the peripheral side of the main lubrication part, which can not only increase the contact area between the main lubrication part and the plate body part, improve the stability of the attachment connection between the main lubrication part and the plate body part, but also prevent the side flanging of the main lubrication part.

[0017] The utility model has an auxiliary lubrication part embedded in the guide part at the front end or the rear end of the plate body, and the lower surface of the auxiliary lubrication part is coplanar with the guide surface of the guide part, thereby achieving lubrication between the guide part and the cloth, and improving the smoothness of feeding and passing the stems.

[0018] The utility model has a plurality of contact bosses formed in the main accommodating groove of the plate body, which can not only increase the contact area between the main lubrication part and the plate body, and improve the stability of the attachment connection between the main lubrication part and the plate body, but also enable the main lubrication part and the contact bosses to contact the feed dog at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a three-dimensional schematic diagram of a composite presser foot sole of the utility model;

[0020] Figure 2 It is a schematic cross-sectional structure diagram of a composite presser foot sole plate of the utility model;

[0021] Figure 3 A top view of the composite presser foot sole of the utility model;

[0022] Figure 4 It is a front view of the composite presser foot sole of the utility model;

[0023] Figure 5 It is a structural schematic diagram of the plate body and the guide part;

[0024] Figure 6 It is a structural schematic diagram of the composite presser foot of the utility model.

[0025] Description of reference numerals in the figures:

[0026] 10. Press the sole of the foot;

[0027] 11. Plate body; 12. Main lubrication part; 13. Main accommodating groove; 14. Guide part; 15. Auxiliary accommodating groove; 16. Auxiliary lubrication part; 17. Attachment boss; 18. Contact boss;

[0028] 20. Presser foot handle;

[0029] 30. Spring;

[0030] 40. Presser foot pin. DETAILED DESCRIPTION

[0031] The following is a further detailed description of the specific implementations of the present invention in conjunction with the accompanying drawings. These implementations are only used to illustrate the present invention, but not to limit the present invention.

[0032] In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0033] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] In addition, in the description of the present invention, unless otherwise specified, “plurality” means two or more.

[0035] Examples, such as Figure 1-Figure 5 As shown, a composite presser foot sole plate 10 includes a plate body 11 and a main lubrication portion 12. A main accommodating groove 13 with a downward opening is formed on the working surface of the plate body 11. The main lubrication portion 12 is installed in the main accommodating groove 13. The plate body 11 surrounds the main lubrication portion 12, and the lower surface of the main lubrication portion 12 is coplanar with the working surface of the plate body 11.

[0036] The present application installs a main lubrication part 12 in the main receiving groove 13 of the plate body 11, and the lower surface of the main lubrication part 2 is coplanar with the working surface of the plate body 11. During the sewing process, the main lubrication part 12 and the plate body 11 can contact the fabric at the same time. The plate body 11 has better wear resistance when in contact with the fabric, and the main lubrication part 12 has better lubrication performance when in contact with the fabric, so that the presser foot sole 10 has both wear resistance and lubrication performance, which not only ensures smooth fabric feeding, but also reduces the wear of the presser foot sole 10 and reduces production costs. At the same time, the plate body 11 surrounds the peripheral side of the main lubrication part 12, and can also prevent the side flanging of the main lubrication part 12.

[0037] It should be noted that: in this application, the horizontal direction and the left-right direction refer to Figure 1 The X-axis direction in the longitudinal direction and the front-back direction refer to Figure 1 The Y-axis direction in the vertical direction and the up-down direction refer to Figure 1 The Z-axis direction.

[0038] Specific embodiment 1, as Figure 1-Figure 5 As shown, a composite presser foot sole plate 10 includes a plate body 11 and a main lubrication portion 12. A main accommodating groove 13 with a downward opening is formed on the working surface of the plate body 11. The main lubrication portion 12 is installed in the main accommodating groove 13. The plate body 11 surrounds the main lubrication portion 12, and the lower surface of the main lubrication portion 12 is coplanar with the working surface of the plate body 11.

[0039] A guide portion 14 is integrally formed at the front end of the plate body 11, and a downwardly opening auxiliary accommodating groove 15 is formed on the guide surface of the guide portion 14. An auxiliary lubrication portion 16 is installed in the auxiliary accommodating groove 15. The guide portion 14 surrounds the auxiliary lubrication portion 16, and the lower surface of the auxiliary lubrication portion 16 is coplanar with the guide surface of the guide portion 14 to ensure smooth feeding and stem passing.

[0040] In other embodiments, a guide portion 14 is integrally formed at the rear end of the plate body 11, and a downwardly opening auxiliary accommodating groove 15 is formed on the guide surface of the guide portion 14, and an auxiliary lubrication portion 16 is installed in the auxiliary accommodating groove 15. The guide portion 14 surrounds the auxiliary lubrication portion 16, and the lower surface of the auxiliary lubrication portion 16 is coplanar with the guide surface of the guide portion 14 to ensure smooth feeding and passing of the stems.

[0041] Preferably, a plurality of attachment bosses 17 are formed in the auxiliary accommodating groove 15, the upper end surface of the attachment boss 17 is integrally formed and fixedly connected with the guide portion 14, and the lower end surface of the attachment boss 17 is coplanar with the guide surface of the guide portion 14. The attachment boss 17 can increase the contact area between the guide portion 14 and the auxiliary lubrication portion 16, and improve the stability of the attachment connection between the auxiliary lubrication portion 16 and the guide portion 14.

[0042] More preferably, the main lubrication portion 12 is formed in the main accommodating groove 13 by an injection molding process, and the auxiliary lubrication portion 16 is formed in the auxiliary accommodating groove 15 by an injection molding process.

[0043] More preferably, the main lubrication part 12 and the auxiliary lubrication part 16 are made of one of Teflon, copper or graphite.

[0044] Specific embodiment 2, as Figure 1-Figure 5 As shown, a composite presser foot sole plate 10 includes a plate body 11 and a main lubrication portion 12. A main accommodating groove 13 with a downward opening is formed on the working surface of the plate body 11. The main lubrication portion 12 is installed in the main accommodating groove 13. The plate body 11 surrounds the main lubrication portion 12, and the lower surface of the main lubrication portion 12 is coplanar with the working surface of the plate body 11.

[0045] A plurality of contact bosses 18 are formed in the main accommodating groove 13, and the upper end surface of the contact boss 18 is integrally formed and fixedly connected with the plate body 11, and the lower end surface of the contact boss 18 is coplanar with the working surface of the plate body 11. The contact boss 18 can not only increase the contact area between the plate body 11 and the main lubrication part 12, and improve the stability of the connection between the main lubrication part 12 and the plate body 11, but also increase the contact area between the plate body 11 and the fabric, thereby ensuring the wear resistance of the presser foot sole 10.

[0046] Preferably, the main lubrication portion 12 and the contact boss 18 are alternately distributed in the transverse direction, or the main lubrication portion 12 and the contact boss 18 are alternately distributed in the longitudinal direction, so that the feed dog can contact the bottom surface of the contact boss 18 and the main lubrication portion 12 at the same time.

[0047] Specifically, the cross section of the contact boss 18 is a diamond, rectangle, circle or other regular shapes.

[0048] More preferably, the front, back, left and right sides of the main lubrication portion 12 are in contact with the plate body portion 11, and in the lateral direction and / or longitudinal direction, each inner wall surface of the main accommodating groove 13 has a plurality of peaks and troughs for increasing the contact area between the main lubrication portion 12 and the plate body portion 11, that is, the line shape of each inner wall surface of the main accommodating groove 13 is a wavy line, thereby increasing the contact area between the main lubrication portion 12 and the plate body portion 11.

[0049] Examples, such as Figure 6 As shown, a composite presser foot includes the above-mentioned presser foot base plate 10, presser foot handle 20 and spring 30, the presser foot handle 20 is arranged in the vertical direction, the presser foot base plate 10 is arranged directly below the presser foot handle 20 in the transverse direction, the bottom end of the presser foot handle 20 is rotatably connected to the presser foot base plate 10 through a presser foot pin 40, the spring 30 is arranged on one lateral side of the presser foot pin 40, and the spring 30 is installed between the presser foot handle 20 and the presser foot base plate 10 in the vertical direction.

[0050] Embodiment, a sewing machine, the sewing machine comprises the above-mentioned composite presser foot.

[0051] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principle of the present invention. These improvements and substitutions should also be regarded as the protection scope of the present invention.

Claims

1. A composite presser foot sole, characterized in that: The presser foot sole plate (10) comprises a plate body (11) and a main lubrication portion (12); a main accommodating groove (13) opening downward is formed on the working surface of the plate body (11); the main lubrication portion (12) is installed in the main accommodating groove (13); the plate body (11) surrounds the main lubrication portion (12), and the lower surface of the main lubrication portion (12) is coplanar with the working surface of the plate body (11).

2. A composite presser foot sole according to claim 1, characterized in that: A guide portion (14) is formed at the front end and / or the rear end of the plate body (11); a downwardly opening auxiliary accommodating groove (15) is formed on the guide surface of the guide portion (14); an auxiliary lubricating portion (16) is installed in the auxiliary accommodating groove (15); the guide portion (14) surrounds the auxiliary lubricating portion (16), and the lower surface of the auxiliary lubricating portion (16) is coplanar with the guide surface of the guide portion (14).

3. A composite presser foot sole according to claim 2, characterized in that: A plurality of attachment bosses (17) are formed in the auxiliary accommodating groove (15); the upper end surface of the attachment boss (17) is fixedly connected to the guide portion (14); and the lower end surface of the attachment boss (17) is coplanar with the guide surface of the guide portion (14).

4. The composite presser foot sole according to claim 2, characterized in that: The main lubrication portion (12) is injection molded in the main accommodating groove (13), and the auxiliary lubrication portion (16) is injection molded in the auxiliary accommodating groove (15).

5. The composite presser foot sole according to claim 2, characterized in that: The main lubricating part (12) and the auxiliary lubricating part (16) are made of Teflon, copper or graphite.

6. The composite presser foot sole according to claim 1, characterized in that: A plurality of contact bosses (18) are formed in the main accommodating groove (13); the upper end surfaces of the contact bosses (18) are fixedly connected to the plate body (11); and the lower end surfaces of the contact bosses (18) are coplanar with the working surface of the plate body (11).

7. A composite presser foot sole according to claim 6, characterized in that: The main lubrication portion (12) and the contact bosses (18) are alternately distributed in the transverse direction and / or the longitudinal direction.

8. The composite presser foot sole according to claim 1, characterized in that: In the transverse direction and / or the longitudinal direction, the inner wall surface of the main accommodating groove (13) has a plurality of crests and troughs for increasing the contact area between the main lubrication portion (12) and the plate body portion (11).

9. A composite presser foot, comprising the presser foot sole according to any one of claims 1 to 8, characterized in that: The composite presser foot further comprises a presser foot handle (20) and a spring (30); the presser foot handle (20) is arranged in the vertical direction; the presser foot base plate (10) is arranged directly below the presser foot handle (20) in the transverse direction; the bottom end of the presser foot handle (20) is rotatably connected to the presser foot base plate (10) via a presser foot pin (40); the spring (30) is arranged on one transverse side of the presser foot pin (40); and the spring (30) is installed between the presser foot handle (20) and the presser foot base plate (10) in the vertical direction.

10. A sewing machine, characterized in that: The sewing machine comprises the composite presser foot according to claim 9.

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