CN116641191A - Automatic wire cutting disc seat device of sewing machine capable of cutting extremely short wire ends - Google Patents

Abstract

The invention provides an automatic wire cutting disc seat device of a sewing machine, which can cut extremely short wire ends, and is formed by oppositely combining a wire cutting disc seat, a connecting rod knife set, a fixed knife piece and a protecting cover elastic piece; the elastic bending section at the front end of the elastic sheet section is provided with an elastic pressing end, and elastic energy accumulated in the pressing section corresponding to the movable cutter is used for pressing the movable cutter, so that the movable cutter can transversely displace towards the fixed cutter to generate a better shearing force channel, and an extremely short thread head can be sheared between a suture and a cutting part and can shrink inwards due to default elasticity of the woven fabric, so that the surface of a sewn product can generate better flatness after shearing, and an overlong thread head is not reserved on the surface of the sewn fabric, thereby greatly improving the sewing quality.

Description

Automatic wire cutting disc seat device of sewing machine capable of cutting extremely short wire ends

Technical Field

The invention relates to a sewing machine, in particular to an automatic wire cutting disc seat device of a sewing machine, which can cut very short wire ends.

Background

The conventional sewing machine technology is a machine for a tailor to stitch a seam on a cloth, and a cutting structure is provided in the sewing machine for cutting the seam, and when a user wants to cut the seam, a needle of the sewing machine is controlled to leave the cloth, and at this time, the sewing machine drives the cutting structure to cut the seam. However, the conventional sewing machine has the following problems:

when the conventional sewing machine blade is designed to cut off the thread, a section of redundant thread is still left at the tail end of the thread on the cloth, so that the thread is uneven, and the appearance of the whole cloth is affected; moreover, the shearing force channel of the conventional sewing machine blade is poor, so that the suture is easily sheared out of place; in addition, the conventional sewing machine has slow rebound and reset after cutting, which greatly influences the efficiency of sewing operation.

Disclosure of Invention

The invention mainly aims at providing an automatic wire cutting disc seat device of a sewing machine, which can cut extremely short wire ends; the problem to be solved is that the surface of the sewn product can generate better flatness after shearing, and overlong thread ends can not be reserved on the surface of the sewn fabric.

The technical characteristics of the problem to be solved are that the automatic wire cutting disc seat device of the sewing machine capable of cutting the extremely short wire ends is adopted, and the automatic wire cutting disc seat device comprises:

the wire cutting disc seat is provided with a chute area, the chute area is provided with a hole seat, a wire hole is arranged in the hole seat, one side of the wire hole is provided with a fixed cutter seat, one side of the fixed cutter seat is provided with a combination part, a plurality of groups of holes are arranged in the chute area, one side end of the chute area is provided with a first pivot seat and a second pivot seat, and the first pivot seat and the second pivot seat are respectively pivoted with a first elastic pivot assembly and a second elastic pivot assembly;

the connecting rod knife set is arranged in the chute area of the tangent disc seat in a linear sliding way and comprises a driving handle and a movable knife edge, wherein one side of the movable knife edge is provided with a side guide block, the bottom surface of the side guide block forms a guide inclined plane, and the top surface of the movable knife edge forms a forced abutting section; the movable blade linearly slides to the wire hole positioned on the tangent disc seat, the connecting rod knife group is provided with a buckling groove corresponding to the second elastic pivot assembly, the connecting rod knife group is provided with a pushing surface corresponding to the first elastic pivot assembly, the buckling groove is embedded and buckled on the first elastic pivot assembly, the pushing surface is forced to be propped against the second elastic pivot assembly, the driving handle can drive the connecting rod knife group by external force, so that the movable blade shears and linearly slides towards the surface of the wire hole, and the connecting rod knife group elastically resets by the first elastic pivot assembly and the second elastic pivot assembly;

the fixed blade is arranged in the fixed blade holder of the tangent disc seat, one end of the fixed blade corresponding to the wire hole is provided with a guide cambered surface, one end of the guide cambered surface is provided with a fixed blade, the fixed blade and the movable blade are in relative shearing positions, the movable blade is in a double-blade shearing action state relative to the wire hole position of the fixed blade through displacement, the guide cambered surface provides relative sliding contact displacement of the guide inclined surface of the movable blade after the movable blade is displaced, the other end of the fixed blade is provided with a combining end, the combining end corresponds to the combining part of the tangent disc seat, and the combining part and the combining end are combined through relative threading locking of the combining part;

the protective cover elastic sheet covers the connecting rod knife set and enables the driving handle and the wire hole to be exposed, wherein the protective cover elastic sheet is provided with a limiting blocking surface corresponding to the driving handle, the driving handle is limited on the limiting blocking surface in a normal state, the protective cover elastic sheet is provided with an elastic sheet section corresponding to the movable knife edge in an extending mode, the front end of the elastic sheet section is provided with an elastic bending section in a downward micro-bending mode, the tail end of the elastic bending section is provided with an elastic pressing end, the elastic pressing end is just corresponding to the pressing section pressing against the movable knife piece, the movable knife edge is longitudinally and elastically pressed through the pressing section and the elastic pressing end of the elastic sheet section, the elastic pressing can enable the movable knife edge to store elastic energy, and the movable knife edge can have a shearing force after being separated from the elastic pressing, and can generate a large shearing force with the fixed knife edge when the movable knife edge moves transversely towards the fixed knife edge.

Further, the chute area of the tangent disc seat comprises a first chute, a second chute and a connecting slot part which are inverted U-shaped, the connecting rod knife set also comprises a driving piece and a movable knife piece, the driving piece is correspondingly arranged in the first chute, the movable knife piece is correspondingly arranged in the second chute, the opposite end parts of the driving piece and the movable knife piece are provided with an embedded end and an embedded slot which can be mutually connected, and the embedded end and the embedded slot are arranged in the connecting slot part; the driving handle is arranged on the driving piece, and the movable blade is arranged on the movable knife element.

Further, the rear end face of the driving handle of the connecting rod knife set is provided with a driving surface.

Further, the plurality of holes of the tangent disc seat comprise a first group of holes and a second group of holes, the protecting cover elastic sheet is provided with a first through hole and a second through hole corresponding to the first group of holes and the second group of holes, so that the first group of holes, the second group of holes, the first through hole and the second through hole are oppositely threaded and locked and combined by a first combining piece and a second combining piece respectively.

Further, the first pivot seat and the second pivot seat of the tangent disc seat are respectively in a concave seat body shape and are communicated with the chute area, wherein the first pivot seat is formed with a first pivot group part, one side of the first pivot group part is provided with a first limit part, the second pivot seat is formed with a second pivot group part, and one side of the second pivot group part is provided with a second limit part.

Further, the first elastic pivot assembly comprises a first pivot assembly, a first gasket and a first elastic piece, wherein a first pivot hole is arranged in the center of the first elastic piece, the first pivot hole is used for pivotally arranging the first pivot assembly to enable the first pivot assembly to be assembled on the first pivot assembly part of the tangential disc seat, the first gasket is clamped between the first pivot assembly part and the first elastic piece, the first elastic piece is provided with two elastic ends which are respectively defined as a first limiting end and a first embedding end, the first limiting end is limited and is pressed against the first limiting part of the tangential disc seat, and the first embedding end is pressed and contacted with the pushing surface of the connecting rod cutter set; the second elastic pivot assembly comprises a second pivot assembly, a second gasket and a second elastic piece, wherein a second pivot hole is arranged in the center of the second elastic piece, the second pivot hole is used for pivotally arranging the second pivot assembly to enable the second pivot assembly to be assembled on the second pivot assembly part of the tangential disc seat, the second gasket is clamped between the second pivot assembly part and the second elastic piece, the second elastic piece is provided with two elastic ends which are respectively defined as a second limiting end and a second embedding end, the second limiting end is limited and is pressed against the second limiting part of the tangential disc seat, and the second embedding end is pressed against the buckling groove of the connecting rod knife set.

Further, the surface of the hole seat of the tangent disc seat corresponding to the line hole is an arc-shaped curved surface, and the movable blade of the connecting rod knife set also forms an arc-shaped curved surface corresponding to the hole seat corresponding to the arc-shaped curved surface.

Further, the longitudinal thickness of the hole seat of the tangent disc seat corresponding to the position of the wire hole is 0.5mm.

The automatic thread cutting disc seat device for sewing machine capable of cutting very short thread ends of the invention makes the movable blade of the movable blade move towards the thread hole and slide linearly with the fixed blade, makes the elastic bending section at the front end of the elastic sheet section form an elastic pressing end, and makes the movable blade move transversely towards the fixed blade by accumulating elastic energy in the pressing section of the movable blade, and makes the longitudinal thickness (H) of the hole seat corresponding to the thread hole position be 0.5mm, so that very short thread ends are cut between the thread and the cutting part, and the very short thread ends shrink inwards due to the default elasticity of the woven cloth, so that the surface of the sewn product can produce better flatness after cutting, and no longer thread ends are reserved on the surface of the sewn cloth.

Drawings

FIG. 1 is a perspective view of an automatic wire cutting disc seat device of a sewing machine capable of cutting extremely short thread ends;

FIG. 2 is an exploded perspective view of the automatic wire cutting disc seat device of the sewing machine capable of cutting very short wire ends of the present invention;

FIG. 3 is a top view of the automatic wire cutting disc seat device of the sewing machine capable of cutting very short wire ends of the invention;

FIG. 4 is a perspective view of the connecting rod knife tackle relative to the wire cutting disc seat after the automatic wire cutting disc seat device of the sewing machine capable of cutting extremely short wire ends separates the protecting cover elastic pieces;

FIG. 5 is another perspective view of the connecting rod knife tackle relative to the cutting disc seat after separating the protecting cover spring plate;

FIG. 6 is a schematic diagram showing the operation of the link knife set driven by external force after separating the protecting cover spring plate according to the present invention;

FIG. 7 is a schematic top view of the present invention after separating the elastic cover sheet, wherein the elastic cover sheet is driven by an external force to drive the link knife set;

FIG. 8 is a schematic illustration of the drive handle of the linkage knife package of the present invention being driven linearly by a drive element provided on any brand sewing machine model;

FIG. 9 is a partial cross-sectional view of the movable blade of the non-actuated linkage knife package of the present invention shearing a suture relative to the interior of a wire hole;

FIG. 10 is a partial cross-sectional view of the invention having actuated the movable blade of the linkage knife package to shear a suture within a wire hole.

Fig. 11 is a block diagram of the structure of the present invention.

Symbol description:

10 tangential line disk seat

101 fixed knife holder

102 joint portion

11 chute area

111 connecting groove portion

112 first channel

113 second channel

12 hole seat

121 arc curved surface

13 line hole

14 first group of holes

15 second group of holes

16 first pivot seat

161 first pivot portion

162 first limit part

17 second pivot seat

171 second pivot portion

172 second limit part

18 first elastic pivot assembly

181 first pivot assembly

182 first gasket

183 first elastic member

184 first pivot hole

185 first limit end

186 first nest end

19 second elastic pivot assembly

191 second pivot assembly

192 second gasket

193 second elastic member

194 second pivot hole

195 second limit end

196 second nest end

20 connecting rod knife tackle

21 drive member

22 end of the embedded group

23, catching groove

24 drive handle

25 drive surface

26 against pushing surface

27 movable knife

28:embedding groove

29 movable blade

291 side guide block

292 guide slope

293 pressing section

30 fixed knife

31 binding end

32 binding member

33 arc-guiding surface

34 fixed blade

40 spring plate of protective cover

41 first through hole

42 second through hole

43 spacing baffle surface

44 spring plate section

441 elastic bending section

442 elastic pressing end

45 first combined piece

46 second coupling member

50 drive element

60 line supplementing element

70 suture

71 a cutting section.

Detailed Description

For a further understanding of the present invention, a preferred embodiment is shown in fig. 1 to 11, and the automatic wire cutting disc seat device for sewing machine capable of cutting very short wire ends of the present invention comprises:

a wire coil base 10 is provided with a chute area 11, a hole base 12 is arranged at a preset position of the chute area 11, a wire hole 13 is arranged at a preset position inside the hole base 12, the longitudinal thickness H of the hole base 12 corresponding to the position of the wire hole 13 is 0.5mm, a fixed cutter holder 101 is arranged at one side of the wire hole 13, a combining part 102 is arranged at one side of the fixed cutter holder 101, the surface of the hole base 12 corresponding to the position of the wire hole 13 is approximately an arc-shaped curved surface 121, a first group of holes 14 and a second group of holes 15 are respectively arranged at a preset position inside the chute area 11, and a first pivot base 16 and a second pivot base 17 are arranged at one side end of the chute area 11;

the first pivot seat 16 and the second pivot seat 17 are respectively in a concave seat body shape and are communicated with the chute area 11, a first pivot group part 161 is formed at a preset position of the first pivot seat 16, a first limiting part 162 is arranged at one side of the first pivot group part 161, a second pivot group part 171 is formed at a preset position of the second pivot seat 17, and a second limiting part 172 is arranged at one side of the second pivot group part 171;

the first pivot portion 161 and the second pivot portion 171 are respectively pivoted to a first elastic pivot member 18 and a second elastic pivot member 19, wherein the first elastic pivot member 18 includes a first pivot member 181, a first spacer 182 and a first elastic member 183, a first pivot hole 184 is disposed at the center of the first elastic member 183, the first pivot hole 184 is used for pivotally disposing the first pivot member 181 such that the first pivot member 181 is assembled on the first pivot portion 161 of the tangent disc seat 10, the first spacer 182 is sandwiched between the first pivot portion 161 and the first elastic member 183, the first elastic member 183 has two elastic ends respectively defined as a first limiting end 185 and a first embedded end 186, wherein the first limiting end 185 is limited to abut against the first limiting portion 162 of the tangent disc seat 10, and the first embedded end 186 is forced to abut against the abutment surface 26 of a link cutter 20;

the second elastic pivot assembly 19 further includes a second pivot assembly 191, a second spacer 192 and a second elastic member 193, wherein a second pivot hole 194 is disposed at the center of the second elastic member 193, the second pivot hole 194 is used for pivotally disposing the second pivot assembly 191 to assemble the second pivot assembly 191 to the second pivot assembly 171 of the tangent disc seat 10, the second spacer 192 is sandwiched between the second pivot assembly 171 and the second elastic member 193, the second elastic member 193 has two elastic ends respectively defined as a second limiting end 195 and a second embedded end 196, wherein the second limiting end 195 is limited to abut against the second limiting portion 172 of the tangent disc seat 10, and the second embedded end 196 is forced to abut against the buckling groove 23 of the connecting rod knife set 20; the chute area 11 of the tangential disc seat 10 comprises a first channel 112, a second channel 113 and a chute portion 111 which are inverted U-shaped;

the above-mentioned connecting rod knife set 20 is disposed in the chute area 11 of the tangent disc seat 10 in a linear sliding manner, the connecting rod knife set 20 includes a driving handle 24 and a movable knife edge 29, wherein a side guiding block 291 is disposed on one side of the movable knife edge 29, a guiding inclined plane 292 is formed on the bottom surface of the side guiding block 291, and a pressing section 293 is formed on the top surface of the movable knife edge 29; the movable blade 29 slides linearly to the wire hole 13 of the tangent disc seat 10, wherein the movable blade 29 is provided with an arc curved surface corresponding to the hole seat 12 and is configured corresponding to the arc curved surface 121, the connecting rod knife set 20 is provided with a buckling groove 23 corresponding to the second elastic pivot assembly 19, the connecting rod knife set 20 is provided with a pushing surface 26 corresponding to the first elastic pivot assembly 18, the buckling groove 23 is embedded and buckled with the first elastic pivot assembly 18, and the pushing surface 26 is forced to abut against the second elastic pivot assembly 19;

the rear end surface of the driving handle 24 is provided with a driving surface 25, the driving surface 25 can drive the connecting rod knife set 20 by external force, so that the movable knife edge 29 can slide linearly towards the surface of the wire hole 13 in a shearing manner, and the connecting rod knife set 20 can be reset elastically by the first elastic pivot assembly 18 and the second elastic pivot assembly 19;

the connecting rod knife set 20 further comprises a driving piece 21 and a movable knife piece 27, wherein the driving piece 21 is correspondingly arranged at one side position of the first channel 112 of the tangent disc seat 10 adjacent to the connecting groove part 111, the movable knife piece 27 is correspondingly arranged at one side position of the second channel 113 adjacent to the connecting groove part 111, an embedded end 22 and an embedded groove 28 which can be mutually connected are arranged at the opposite end positions of the driving piece 21 and the movable knife piece 27, the embedded end 22 and the embedded groove 28 are arranged at the connecting groove part 111, the driving handle 24 is arranged at the middle position of the driving piece 21, the movable knife blade 28 is arranged at one end of the movable knife piece 27 far away from the embedded groove 28, and the movable knife piece 27 and the driving piece 21 can be separated, disassembled or connected and assembled by the embedded end 22 and the embedded groove 28 so that the movable knife piece 27 can be singly replaced corresponding to the loss degree of the movable knife blade 29;

a fixed knife 30 disposed in the fixed knife holder 101 of the tangent disk seat 10, wherein a guiding arc surface 33 is disposed at one end of the fixed knife 30 corresponding to the wire hole 13, a fixed knife edge 34 is disposed at one end of the guiding arc surface 33, wherein the fixed knife edge 34 and the movable knife edge 29 are in relative shearing positions, the movable knife edge 29 is in a double-edge shearing action state relative to the wire hole 13 through displacement, the guiding arc surface 33 provides relative guiding sliding contact displacement of the guiding inclined surface 292 of the movable knife edge 29 after the movable knife edge 29 is displaced, a combining end 31 is disposed at the other end of the fixed knife 30, the combining end 31 corresponds to the combining portion 102 of the tangent disk seat 10, and the combining portion 102 and the combining end 31 are combined by means of a combining piece 32 in a threaded locking manner;

a protecting cover elastic sheet 40, corresponding to the first set of holes 14 and the second set of holes 15 of the wire cutting disc base 10, provided with a first through hole 41 and a second through hole 42, such that the first set of holes 14 and the second set of holes 15 and the first through hole 41 and the second through hole 42 are respectively locked and combined by a first combining piece 45 and a second combining piece 46 through threading, the protecting cover elastic sheet 40 just covers the connecting rod knife set 20 and exposes the driving handle 24 and the wire hole 13, wherein the protecting cover elastic sheet 40 is provided with a limiting stop surface 43 corresponding to the driving handle 24, such that the driving handle 24 is limited at the limiting stop surface 43 under normal state; the protecting cover elastic sheet 40 extends to have an elastic sheet section 44 corresponding to the movable blade 29, the movable blade 27 is hidden between the tangent disc seat 10 and the elastic sheet section 44 for linear sliding, an elastic bending section 441 is formed at the front end of the elastic sheet section 44, an elastic pressing end 442 is formed at the end of the elastic bending section 441, the elastic pressing end 442 is just corresponding to the pressing section 293 pressing the movable blade 27, the movable blade 29 is longitudinally elastically pressed with the elastic pressing end 442 of the elastic sheet section 44 through the pressing section 293, the elastic pressing can enable the movable blade 29 to accumulate an elastic energy, so that the movable blade 29 has a short-range impact force after being separated from the elastic pressing, and a relatively large shearing force can be generated between the movable blade 29 of the movable blade 27 and the fixed blade 34 when the movable blade 29 of the movable blade 27 is laterally displaced towards the fixed blade 34;

referring to fig. 8-10, the driving surface 25 at the rear end of the driving handle 24 can be driven by a driving element 50, and the driving element 60 is used to support against the line segment in a right driving mode with vertical positioning, so as to drive the link cutter 20 in a straight line, so that the driving element 21 drives the embedded slot 28 of the movable cutter 27 by the embedded end 22, the movable cutter 29 of the movable cutter 27 shears and slides linearly towards the line hole 13 and with the fixed cutter 34, an elastic pressing end 442 is formed at the end of the elastic bending section 441 at the front end of the elastic sheet section 44, and an elastic energy accumulated in the pressing section 293 correspondingly pressing against the movable cutter 27 can generate a better shearing force channel when the movable cutter 29 moves transversely towards the fixed cutter 34, and meanwhile, the longitudinal thickness (H) of the position of the hole seat 12 corresponding to the line hole 13 is 0.5mm, so that an extremely short thread end is sheared between the seam 70 and the cutting part 71, and the extremely short thread end can reserve a better shearing surface of a sewn product due to default elasticity of the fabric, and the overlong surface of the sewn product can be reserved; the present invention has a dual return power design of a first elastic pivot assembly 18 and a second elastic pivot assembly 19, which can make the link cutter set 20 rebound quickly after cutting the coil head, so as to greatly shorten the efficiency of cutting return.

Referring to fig. 11, a block diagram of the present invention is shown, and the tangential disc seat 10 of the present invention mainly uses a connecting rod knife set 20 and the cover spring 40 to achieve a preferred driving purpose.

Therefore, the automatic wire cutting disc seat device of the sewing machine capable of cutting the extremely short wire ends can improve the defect that cutters of various brands cannot be shared because of different driving designs of various brands, and can improve the defect of the prior art and be suitable for a driving element 50 arranged on any type of the sewing machine of the brands to be used as a linear driver.

Claims (8)

1. The utility model provides a but sewing machine automatic wire cutting disk seat device of cutting extremely short thread head which characterized in that includes:

the wire cutting disc seat is provided with a chute area, the chute area is provided with a hole seat, a wire hole is arranged in the hole seat, one side of the wire hole is provided with a fixed cutter seat, one side of the fixed cutter seat is provided with a combination part, a plurality of groups of holes are arranged in the chute area, one side end of the chute area is provided with a first pivot seat and a second pivot seat, and the first pivot seat and the second pivot seat are respectively pivoted with a first elastic pivot assembly and a second elastic pivot assembly;

the connecting rod knife set is arranged in the chute area of the tangent disc seat in a linear sliding way and comprises a driving handle and a movable knife edge, wherein one side of the movable knife edge is provided with a side guide block, the bottom surface of the side guide block forms a guide inclined plane, and the top surface of the movable knife edge forms a forced abutting section; the movable blade linearly slides to the wire hole positioned on the tangent disc seat, the connecting rod knife group is provided with a buckling groove corresponding to the second elastic pivot assembly, the connecting rod knife group is provided with a pushing surface corresponding to the first elastic pivot assembly, the buckling groove is embedded and buckled on the first elastic pivot assembly, the pushing surface is forced to be propped against the second elastic pivot assembly, the driving handle can drive the connecting rod knife group by external force, so that the movable blade shears and linearly slides towards the surface of the wire hole, and the connecting rod knife group elastically resets by the first elastic pivot assembly and the second elastic pivot assembly;

the fixed blade is arranged in the fixed blade holder of the tangent disc seat, one end of the fixed blade corresponding to the wire hole is provided with a guide cambered surface, one end of the guide cambered surface is provided with a fixed blade, the fixed blade and the movable blade are in relative shearing positions, the movable blade is in a double-blade shearing action state relative to the wire hole position of the fixed blade through displacement, the guide cambered surface provides relative sliding contact displacement of the guide inclined surface of the movable blade after the movable blade is displaced, the other end of the fixed blade is provided with a combining end, the combining end corresponds to the combining part of the tangent disc seat, and the combining part and the combining end are combined through relative threading locking of the combining part;

the protective cover elastic sheet covers the connecting rod knife set and enables the driving handle and the wire hole to be exposed, wherein the protective cover elastic sheet is provided with a limiting blocking surface corresponding to the driving handle, the driving handle is limited on the limiting blocking surface in a normal state, the protective cover elastic sheet is provided with an elastic sheet section corresponding to the movable knife edge in an extending mode, the front end of the elastic sheet section is provided with an elastic bending section in a downward micro-bending mode, the tail end of the elastic bending section is provided with an elastic pressing end, the elastic pressing end is just corresponding to the pressing section pressing against the movable knife piece, the movable knife edge is longitudinally and elastically pressed through the pressing section and the elastic pressing end of the elastic sheet section, the elastic pressing can enable the movable knife edge to store elastic energy, and the movable knife edge can have a shearing force after being separated from the elastic pressing, and can generate a large shearing force with the fixed knife edge when the movable knife edge moves transversely towards the fixed knife edge.

2. The automatic wire cutting disc seat device for sewing machine capable of cutting extremely short wire ends according to claim 1, wherein the automatic wire cutting disc seat device is characterized in that: the chute area of the tangent disc seat comprises a first chute, a second chute and a connecting groove part which are inverted U-shaped, the connecting rod knife set also comprises a driving piece and a movable knife piece, the driving piece is correspondingly arranged at one side position of the first chute adjacent to the connecting groove part, the movable knife piece is correspondingly arranged at one side position of the second chute adjacent to the connecting groove part, the opposite end positions of the driving piece and the movable knife piece are provided with an embedded end and an embedded groove which can be mutually connected, the embedded end and the embedded groove are arranged at the connecting groove part, the driving handle is arranged on the driving piece, and the movable knife edge is arranged on the movable knife piece.

3. The automatic wire cutting disc seat device for sewing machine capable of cutting extremely short wire ends according to claim 1, wherein the automatic wire cutting disc seat device is characterized in that: the rear end face of the driving handle of the connecting rod knife group is provided with a driving surface.

4. The automatic wire cutting disc seat device for sewing machine capable of cutting extremely short wire ends according to claim 1, wherein the automatic wire cutting disc seat device is characterized in that: the plurality of groups of holes of the tangent disc seat comprise a first group of holes and a second group of holes, the protecting cover elastic sheet is provided with a first through hole and a second through hole corresponding to the first group of holes and the second group of holes, so that the first group of holes and the second group of holes and the first through hole and the second through hole are oppositely threaded and locked and combined by a first combining piece and a second combining piece respectively.

5. The automatic wire cutting disc seat device for sewing machine capable of cutting extremely short wire ends according to claim 1, wherein the automatic wire cutting disc seat device is characterized in that: the first pivot seat and the second pivot seat of the tangent disc seat are respectively in a concave seat body shape and are communicated with the chute area, wherein the first pivot seat is formed with a first pivot group part, one side of the first pivot group part is provided with a first limit part, the second pivot seat is formed with a second pivot group part, and one side of the second pivot group part is provided with a second limit part.

6. The automatic wire cutting disc seat device for the sewing machine capable of cutting extremely short wire ends, according to claim 5, is characterized in that: the first elastic pivot assembly comprises a first pivot assembly, a first gasket and a first elastic piece, wherein a first pivot hole is formed in the center of the first elastic piece, the first pivot hole is used for pivotally arranging the first pivot assembly to enable the first pivot assembly to be assembled on the first pivot assembly part of the tangent disc seat, the first gasket is clamped between the first pivot assembly part and the first elastic piece, the first elastic piece is provided with two elastic ends which are respectively defined as a first limiting end and a first embedding end, the first limiting end is limited and is pressed against the first limiting part of the tangent disc seat, and the first embedding end is pressed against the pushing surface of the connecting rod cutter set; the second elastic pivot assembly comprises a second pivot assembly, a second gasket and a second elastic piece, wherein a second pivot hole is arranged in the center of the second elastic piece, the second pivot hole is used for pivotally arranging the second pivot assembly to enable the second pivot assembly to be assembled on the second pivot assembly part of the tangential disc seat, the second gasket is clamped between the second pivot assembly part and the second elastic piece, the second elastic piece is provided with two elastic ends which are respectively defined as a second limiting end and a second embedding end, the second limiting end is limited and is pressed against the second limiting part of the tangential disc seat, and the second embedding end is pressed against the buckling groove of the connecting rod knife set.

7. The automatic wire cutting disc seat device for sewing machine capable of cutting extremely short wire ends according to claim 1, wherein the automatic wire cutting disc seat device is characterized in that: the surface of the hole seat of the tangent disc seat corresponding to the position of the tangent line hole is an arc curved surface, and the movable blade of the connecting rod knife set also forms an arc curved surface corresponding to the hole seat.

8. The automatic wire cutting disc seat device for sewing machine capable of cutting extremely short wire ends according to claim 1, wherein the automatic wire cutting disc seat device is characterized in that: the longitudinal thickness of the hole seat of the tangent disc seat corresponding to the position of the line hole is 0.5mm.