CN107326555B

CN107326555B - kinds of sewing machine

Info

Publication number: CN107326555B
Application number: CN201710666134.0A
Authority: CN
Inventors: 柯祥林; 祝书伟; 郑吉�; 何明金
Original assignee: Jack Sewing Machine Co Ltd
Current assignee: Jack Technology Co Ltd
Priority date: 2017-08-07
Filing date: 2017-08-07
Publication date: 2020-01-31
Anticipated expiration: 2037-08-07
Also published as: CN107326555A

Abstract

The invention discloses sewing machines, which comprises a backstitch driving part, a backstitch executing mechanism connected with the backstitch driving part and used for realizing backstitch sewing, and a backstitch executing mechanism connected with a closed seam driving part and telescopically arranged between the backstitch driving part and the backstitch executing mechanism and used for limiting the driving distance of the backstitch driving part.

Description

kinds of sewing machine

Technical Field

The invention relates to the technical field of sewing machines, in particular to sewing machines.

Background

As is known, when a flat sewing machine is used for cutting threads, because the needle pitch cannot be adjusted, bottom thread ends of needle pitches cannot be self-locked, the length of the cut thread of a sewing material is , and , the length of the and the length of the of the two thread ends are of the front portion of , the thread ends left after the thread is cut are not firm, the thread ends are pulled lightly to fall off, the sewing effect is affected, and in addition, the thread ends are too long, and the aesthetic feeling is affected.

Specifically, in order to realize the close-sewing operation, a close-sewing electromagnet is generally used for electrifying, and then the corresponding component is driven to realize that the swinging seat moves to an extremely small needle pitch, so that the close-sewing function is completed.

Disclosure of Invention

The invention aims to provide sewing machines, which realize the close sewing function by inserting a close sewing driving part between a backstitch driving part and a backstitch executing mechanism.

In order to achieve the purpose, the invention provides kinds of sewing machines, which comprise a backstitch driving part, a backstitch executing mechanism connected with the backstitch driving part and used for realizing backstitch sewing, and a backstitch executing mechanism connected with a closed stitch driving part and telescopically arranged between the backstitch driving part and the backstitch executing mechanism and used for limiting the driving distance of the backstitch driving part.

Compared with the prior art, the sewing machine provided by the invention has the advantages that the close sewing actuating mechanism driven by the close sewing driving part is telescopically arranged between the backstitch driving part and the backstitch actuating mechanism, so that the driving distance of the backstitch driving part can be limited, namely the movement distance of the backstitch actuating mechanism is limited, and the backstitch driving part has a close sewing function rather than the backstitch function, so that the arrangement abandons the situation that the close sewing driving part is used for directly driving the tail end executing part such as a swinging seat in the prior art, but the close sewing actuating mechanism is used for limiting the driving distance of the backstitch driving part, so that the tail end executing part such as the swinging seat in the backstitch actuating mechanism completes the needle pitch adjustment to realize the close sewing function, and during the thread cutting action, the needle pitch can be adjusted to be minimum or required needle pitch, the thread head after the thread cutting is firmer, the thread cutting is carried out at the small needle pitch, the length of the bottom thread surface thread remained on the sewing material is is consistent, and the appearance is more attractive.

Preferably, the backstitch actuator comprises:

the backstitch connecting part is connected with the output end of the backstitch driving part;

the buffer part is connected with the output end of the backstitch driving part and has a gap with the connecting part;

the close seam actuating mechanism comprises:

the close seam connecting part is connected with the output end of the close seam driving part;

the tight seam pull rod is hinged at the tail end of the tight seam connecting part;

and the limiting rod is hinged with the tail end of the close joint pull rod and can be inserted and embedded between the connecting part and the buffer part under the driving of the close joint driving part.

Preferably, the limiting rod is in a herringbone shape with two low ends and a high middle part; the left end of the limiting rod is hinged to the close-seam pull rod, the right end of the limiting rod is provided with an inserting end in the shape of an upper semi-arc, and the middle high point of the limiting rod is hinged to the fixed shaft.

Preferably, the limiting rod comprises a horizontal part sliding along the horizontal direction and a protrusion which is located at the left end of the horizontal part and is bent upwards, the top of the protrusion is hinged to the tight-seam pull rod, and the right end of the horizontal part is provided with a right semi-arc-shaped insertion end.

Preferably, still include and be used for fixing the gag lever post support of dead axle, the gag lever post support is including the support base that can carry out position control, the support base has linked firmly vertical board, vertical board has and is used for fixing the spacing hole of dead axle.

Preferably, still including being used for supplying the gag lever post guide rail that the gag lever post slided along the horizontal direction, the gag lever post guide rail is including the guide rail base that can carry out position control, the guide rail base has linked firmly and has can compress tightly the horizontal part is in order to realize the housing washer that the gag lever post slided along the horizontal direction.

Preferably, the backstitch actuator further comprises:

the reverse feeding connecting rod is connected with the output end of the reverse sewing driving part and is positioned outside the buffer part;

the material reversing and feeding crank is hinged to the tail end of the material reversing and feeding connecting rod;

the material reversing and feeding pull rod is hinged with the material reversing and feeding crank and forms an included angle with the material reversing and feeding connecting rod;

and the swinging seat is hinged to the tail end of the material reversing and feeding pull rod to realize needle pitch adjustment.

Preferably, the tail end of the tight seam connecting part is also provided with a resetting part for resetting the tight seam connecting part.

Preferably, the backstitch connecting part and the close seam connecting part are arranged vertically.

Preferably, the reset part is a reset spring with an end connected to the end of the tight seam connecting part and an end connected to the backstitch driving part.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, 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 plan view of sewing machines according to an embodiment of the present invention;

FIG. 2 is an isometric view of FIG. 1;

FIG. 3 is a schematic diagram of the structure of FIG. 2;

FIG. 4 is a schematic structural diagram of FIG. 2 in a power-off state;

FIG. 5 is a schematic view of the structure of FIG. 2 in the energized state;

FIG. 6 is a block diagram of the spacing rod bracket of FIG. 2;

FIG. 7 is a block diagram of the spacing rod of FIG. 2;

FIG. 8 is an isometric view of another sewing machine provided in accordance with an embodiment of the present invention;

FIG. 9 is a schematic diagram of the structure of FIG. 8;

FIG. 10 is a schematic view of the structure of FIG. 8 in a power-off state;

FIG. 11 is a schematic view of the structure of FIG. 8 in the energized state;

FIG. 12 is a block diagram of the check rod guide of FIG. 8;

fig. 13 is a structural view of the stopper rod of fig. 8.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only partial embodiments of of the present invention, rather than all embodiments.

In order to facilitate a better understanding of the inventive arrangements for those skilled in the art, the present invention is further described in conjunction with the accompanying drawings and the detailed description.

Referring to fig. 1 to 13, fig. 1 is a schematic plan view of sewing machines according to an embodiment of the present invention, fig. 2 is an isometric view of fig. 1, fig. 3 is a schematic structural view of fig. 2, fig. 4 is a schematic structural view of fig. 2 in a power-off state, fig. 5 is a schematic structural view of fig. 2 in a power-on state, fig. 6 is a structural view of a stopper rod bracket of fig. 2, fig. 7 is a structural view of the stopper rod of fig. 2, fig. 8 is an isometric view of another sewing machines according to an embodiment of the present invention, fig. 9 is a schematic structural view of fig. 8, fig. 10 is a schematic structural view of fig. 8 in a power-off state, fig. 11 is a schematic structural view of fig. 8 in a power-on state, fig. 12 is a structural view of a stopper rod guide rail of fig. 8, and fig. 13.

The sewing machine comprises a backstitch driving part 2, a backstitch executing mechanism, a close-sewing driving part 12 and a close-sewing executing mechanism, wherein the backstitch driving part 2 can be a backstitch electromagnet, the close-sewing driving part 12 can be a close-sewing electromagnet, and the backstitch executing mechanism can execute corresponding actions to realize the backstitch function only after the backstitch driving part 2 moves.

The core of the invention is that under the driving action of the close sewing driving part 12, the close sewing actuating mechanism can extend into the space between the backstitch driving part 2 and the backstitch actuating mechanism, so as to limit the driving distance of the backstitch driving part 2, namely the movement distance of the backstitch actuating mechanism, and realize the close sewing function by using the backstitch driving part 2. When the close-stitch executing mechanism extends between the backstitch driving part 2 and the backstitch executing mechanism, the backstitch driving part 2 has the close-stitch function instead of the backstitch function. If the close-stitch actuator is in a state where the driving distance of the backstitch driving part 2 is not limited (the close-stitch actuator does not extend between the backstitch driving part 2 and the backstitch actuator), the backstitch driving part 2 can realize the backstitch function.

It should be noted that, the backstitch actuating mechanism of the invention includes the swing seat 10 located at the end of the mechanism, and under the dual actions of the driving action of the backstitch driving part 2 and the limitation of the close-stitch actuating mechanism on the driving distance of the backstitch driving part 2, the minimum needle pitch adjustment of the swing seat 10 is finally realized; therefore, the swing seat 10 is directly driven by the close joint driving part 12 to realize the close joint function in the prior art; that is, the invention improves the setting mode and function of the close seam actuating mechanism, the close seam actuating mechanism in the prior art comprises a swinging seat 10 positioned at the tail end of the mechanism, and a close seam driving part 12 directly drives the swinging seat 10 to realize the close seam function, so that the driving force of the close seam driving part 12 is required to be larger, and higher requirements are put forward on the close seam driving part 12; however, the close-sewing actuator of the present invention is selectively disposed between the backstitch driving part 2 and the backstitch actuator, that is, the close-sewing actuator of the present invention does not include the swing seat 10, but only can extend into the space between the backstitch driving part 2 and the backstitch actuator to limit the driving distance of the backstitch driving part 2, and the backstitch driving part 2 is utilized to realize the close-sewing function.

The backstitch executing mechanism can comprise a backstitch connecting part 4 and a buffering part 6, wherein fixed gaps are formed between the backstitch connecting part 4 and the buffering part 6, the backstitch driving part 2 can be the backstitch electromagnet, the backstitch electromagnet is connected with a backstitch electromagnet iron core, the backstitch connecting part 4 is the backstitch electromagnet iron core, and the buffering part 6 can be a rubber pad, as shown in the attached figures 1, 2 and 8 of the specification.

The close joint executing mechanism can comprise a close joint connecting part 15, a close joint pull rod 14 and a limiting rod 5; the close-seam driving part 12 can be the close-seam electromagnet, the close-seam electromagnet is connected with a close-seam electromagnet core, and the close-seam connecting part 15 is the close-seam electromagnet core, as shown in the attached figures 1, 2 and 8 of the specification.

The tight seam pull rod 14 is hinged to the tail end of the tight seam connecting portion 15 through the shaft position screw 13, and the limiting rod 5 is hinged to the tail end of the tight seam pull rod 14, as shown in the attached

drawings

3 and 9 in the specification, when the tight seam driving portion 12 moves leftwards, it can be understood that after the tight seam electromagnet is electrified, the tight seam connecting portion 15 moves leftwards to drive the tight seam pull rod 14 to move leftwards, and the limiting rod 5 moves leftwards due to the movement of the tight seam pull rod 14 and then extends into the space between the connecting portion 4 and the buffer portion 6, namely, the driving distance of the backstitch driving portion 2 is limited, so that the tight seam function is realized.

Aiming at the specific shape and structure of the limiting rod 5, the invention provides the following two specific embodiments:

, as shown in the accompanying drawings 2 to 7 of the specification, the limit rod 5 is similar to a herringbone with two low ends and a high middle, a pull rod hinge hole 53 is arranged at a low point at the left end of the limit rod 5, the pull rod hinge hole 53 is hinged with the close joint pull rod 14 through a left end pin shaft 16, so that the limit rod 5 rotates relative to the close joint pull rod 14, a fixed shaft hinge hole 52 is arranged at a high point at the middle of the limit rod 5, the fixed shaft hinge hole 52 is hinged with the fixed shaft 3 through a middle pin shaft, so that the limit rod 5 rotates relative to the fixed shaft 3, and an insertion end head 51 is arranged at the right end of the limit rod 5, wherein the insertion end head 51 is in a half arc shape and is inserted and embedded between the connecting part 4 and the buffer part 6 from the upper.

In order to fix the position of the fixed shaft 3, a limiting rod support 110 can be arranged, as shown in fig. 6 of the specification, the limiting rod support comprises a support base 1101 and a vertical plate 1102, the support base 1101 and the vertical plate 1102 can be formed by bending plates, the vertical plate 1102 can be provided with a positioning hole 1103, the fixed shaft 3 is fixed in the positioning hole 1103 to be hinged with the fixed shaft hinge hole 52 of the limiting rod 5, and the limiting rod 5 rotates relative to the positioning hole 1103.

The bracket base 1101 can be a horizontal plate and is arranged on the bottom plate 18, the bracket base 1101 is provided with a waist-shaped hole 1104, and the fastening part penetrating through the waist-shaped hole 1104 is fixed with the bottom plate 18, the invention can utilize characteristic that the size of the waist-shaped hole 1104 is larger than that of the fastening part, so that the position change of the limiting rod bracket 110 relative to the bottom plate 18 is realized, namely the position change of the limiting rod 5 arranged on the limiting rod bracket 110 is adjusted, and further the retraction position change of the backstitch connecting part 4 is limited by the limiting rod 5, so that the stitch length during the close sewing can be finely adjusted within a fixed range of .

In a second arrangement of the stop lever 5, as shown in fig. 8 to 13 of the specification, the stop lever 5 includes a horizontal portion 56, a left end of the horizontal portion 56 has an upwardly bent protrusion 54, a right end of the horizontal portion 56 has an insertion end 57, and the insertion end 57 is in a right semi-arc shape. The protrusion 54 may further be provided with a protrusion positioning hole 55, and the hinge joint with the seam-sealing pull rod 14 is realized through the protrusion positioning hole 55 and a pin shaft matched with the protrusion positioning hole 55.

In order to cooperate with the limiting rod 5 to realize the function, a limiting rod guide rail 111 can be further arranged, the limiting rod guide rail 111 comprises a guide rail base 1111, the guide rail base 1111 can be provided with a kidney-shaped hole 1113, and the guide rail base 1111 is fixed on the bottom plate 18 by utilizing the kidney-shaped hole 1113; similar to rack mount 1101 above, rail mount 1111 can be fine-tuned in position relative to base plate 18; guide rail base 1111 links firmly clamp plate 1112, and the lower terminal surface of clamp plate 1112 can realize compressing tightly limiting rod 5, also is under the effect of clamp plate 1112 and bottom plate 18, and limiting rod 5 is arranged in the clearance between clamp plate 1112 and the bottom plate 18, accomplishes the action that the level slided, and then ensures that limiting rod 5 stretches into between connecting portion 4 and the buffer portion 6, realizes the close seam function.

The stitch-aligning executing mechanism can further comprise a back feeding connecting rod 7, a back feeding crank 8, a back feeding pull rod 9 and a swinging seat 10, for example, referring to the attached drawing 2 in the specification, when stitch-aligning is needed, a stitch-aligning driving part 12 drives a stitch-aligning connecting part 15 to retract, a stitch-aligning pull rod 14 moves towards the side of the stitch-aligning driving part 12, the stitch-aligning pull rod 14 pulls a limiting rod 5 to rotate around a limiting rod support 110, after the limiting rod 5 rotates for a certain angle, an inserting end 51 of the limiting rod 5 extends between a connecting part 4 and a buffering part 6, then the stitch-aligning driving part 2 is electrified to drive the connecting part 4 to retract, the automatic back feeding connecting rod 7 is pulled to drive the automatic back feeding crank 8 to rotate, and accordingly the automatic back feeding pull rod 9 pulls the swinging seat 10, the position of the swinging seat 10 at this time is no longer the stitch-aligning needle distance position, but the connecting part 4 is limited by the limiting rod 5, namely minimum needle distances or required needle distances.

In order to realize that the tight seam connection part 15 can return to the original position, a reset part 17 can be arranged at the tail end of the tight seam connection part 15, as shown in fig. 2 to 5 and fig. 8 to 11 in the specification, wherein the backstitch connection part 4 and the tight seam connection part 15 can be vertically arranged, at this time, the reset part 17 can be specifically a reset spring, an end of the reset spring is connected to the tail end of the tight seam connection part 15, and another end of the reset spring is connected to the backstitch driving part 2, and the backstitch driving part 2 and the tight seam driving part 12 are both fixed relative to the bottom plate 18, so that the reset of the tight seam connection part 15 can be realized.

In this arrangement, the power of the close-seam driving unit 12 does not drive the swing seat 10 by a component such as a link but acts between the connecting unit 4 and the buffer unit 6, and the position of the connecting unit 4 is limited by the stopper rod 5 inserted into the connecting unit 4 and the buffer unit 6. Under the working condition, the close joint driving part 12 only needs to overcome the pulling force of the reset part 17, so that the requirement on the close joint driving part 12 (electromagnet attraction force) is greatly reduced compared with the original structure.

When the wire is cut, firstly, the close joint driving part 12 is electrified, and the limiting rod 5 extends into the space between the connecting part 4 and the buffer part 6 for limiting; then the backstitch driving part 2 is electrified to pull the swinging seat 10 to move to an extremely small needle pitch (or a required needle pitch), two needles are sewn under the state, and the thread cutting electromagnet 1 is electrified to perform thread cutting operation.

It should be noted that in this specification, relational terms such as and second are used only to distinguish entities from other entities, and no requires or implies that any such actual relationship or order exists between the entities.

The sewing machine provided by the invention is described in detail above. The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.

Claims

The sewing machine comprises a backstitch driving part (2) and a backstitch executing mechanism which is connected with the backstitch driving part (2) and used for realizing backstitch sewing, and is characterized by further comprising a backstitch executing mechanism which is connected with a closed stitch driving part (12), telescopically arranged between the backstitch driving part (2) and the backstitch executing mechanism and used for limiting the driving distance of the backstitch driving part (2);

the backstitch actuator includes:

the backstitch connecting part (4) is connected with the output end of the backstitch driving part (2);

the buffer part (6) is connected with the output end of the backstitch driving part (2) and has a gap with the backstitch connecting part (4);

the close seam actuating mechanism comprises:

the close seam connecting part (15) is connected with the output end of the close seam driving part (12);

a close joint pull rod (14) hinged at the tail end of the close joint connecting part (15);

the limiting rod (5) is hinged with the tail end of the close joint pull rod (14) and can be inserted and embedded between the backstitch connecting part (4) and the buffer part (6) under the driving of the close joint driving part (12);

wherein the limiting rod (5) is in a herringbone shape with two low ends and a high middle part; the left end of the limiting rod (5) is hinged to the close-seam pull rod (14), the right end of the limiting rod (5) is provided with an inserting end (51) in an upper semi-arc shape, and the middle high point of the limiting rod (5) is hinged to the fixed shaft (3); the fixing device is characterized by further comprising a limiting rod support (110) used for fixing the dead axle (3), wherein the limiting rod support (110) comprises a support base (1101) capable of adjusting the position, a vertical plate (1102) is fixedly connected to the support base (1101), and the vertical plate (1102) is provided with a limiting hole (1103) used for fixing the dead axle (3); alternatively, the first and second electrodes may be,

the limiting rod (5) comprises a horizontal part sliding along the horizontal direction and a bulge which is positioned at the left end of the horizontal part and is bent upwards, the top of the bulge is hinged to the tight-seam pull rod (14), and the right end of the horizontal part is provided with a right semi-arc-shaped inserting and embedding end head (57); still include and be used for supplying gag lever post guide rail (111) that gag lever post (5) slided along the horizontal direction, gag lever post guide rail (111) are including guide rail base (1111) that can carry out position control, guide rail base (1111) have linked firmly can compress tightly the horizontal part is in order to realize gag lever post (5) are along pressure strip (1112) that the horizontal direction slided.
2. The sewing machine of claim 1, wherein the backstitch actuator further comprises:

the reverse feeding connecting rod (7) is connected with the output end of the reverse sewing driving part (2) and is positioned outside the buffer part (6);

a material reversing and feeding crank (8) hinged at the tail end of the material reversing and feeding connecting rod (7);

the material reversing and feeding pull rod (9) is hinged to the material reversing and feeding crank (8) and forms an included angle with the material reversing and feeding connecting rod (7);

and the swinging seat (10) is hinged at the tail end of the reverse feeding pull rod (9) to realize needle pitch adjustment.
3. Sewing machine as in claim 1, characterized in that the end of said tight seam connection (15) is also provided with a resetting portion (17) to reset said tight seam connection (15).
4. Sewing machine as in claim 3, characterized in that said backstitch connection (4) is arranged perpendicularly to said closed seam connection (15).
5. Sewing machine as in claim 4, characterized in that said return element (17) is embodied as a return spring whose end is connected to the end of said closed seam connection (15) and whose end is connected to said backstitch drive (2).