TWM641454U - Cutter device for sewing machine - Google Patents

Abstract

A sewing machine cutter device, installed in a sewing machine, the sewing machine includes a lower arm and an upper arm opposite to the lower arm, the lower arm has a sewing platform, and the upper arm has a sewing assembly that moves reciprocally relative to the sewing platform , the sewing machine cutter device includes a fixed knife seat arranged on the lower arm, a movable cutter matched with the fixed knife seat, and a movable cutter set on the upper arm to drive the movable knife to move toward the fixed knife seat Cutter drive. The movable cutter has a connecting seat connected to the cutting knife driving member, a knife piece pivotally connected to the connecting seat, and an elastic member which is arranged on the connecting seat and contacts the end of the knife piece which is not pivotally connected to the connecting seat , the cutting action is generated when the knife element is in contact with the fixed knife seat.

Description

Sewing machine cutter device

The invention relates to a cutting device of a sewing machine, especially a cutting device of a sewing machine which implements a cutting action.

CN110528191A discloses an upper and lower cutter combination device, which includes an upper cutter assembly and a lower fixed knife assembly installed on a frame, and the upper cutter assembly includes a housing with a guide rail component inside Body, an upper cylinder installed on the casing, a connecting element installed on the lower end of the piston rod of the upper cylinder and in the casing and cooperating with the guide rail component up and down, and a vertically mounted on the connecting element Arranged upper cutter. The lower fixed knife assembly includes a lower bracket fixed on the frame, a rotating shaft, a lower rotating base connected to the lower bracket through a rotating shaft, and a lower rotating base vertically installed on the lower rotating base. The upper cutter cooperates with the lower fixed knife for cutting the cloth, and elastically connects the free end of the lower rotating seat and the return spring of the lower bracket. However, CN110528191A makes the design of rotating and swinging the lower fixed knife as the static blade, which will make the overall adjustment of the cutter more complicated. In addition to confirming the position of the lower knife of the upper cutting knife assembly as the moving blade, it is necessary to adjust the position of the lower knife. The basic position and swing state of the fixed knife can be cut accurately. In addition, the design structure of CN110528191A is relatively complicated.

The main purpose of this creation is to solve the problem of adjustment action and complex structure derived from the movable static blade.

To achieve the above purpose, the invention provides a sewing machine cutter device, installed in a sewing machine, the sewing machine includes a lower arm and an upper arm opposite to the lower arm, the lower arm has a sewing platform, The upper arm has a sewing assembly that moves back and forth relative to the sewing platform, and the sewing machine cutter device includes a fixed knife seat on the lower arm, a movable knife that cooperates with the fixed knife seat, and a knife set on the The upper arm is used to drive the movable cutter to move toward the cutter driving part of the fixed knife seat. The movable cutter has a connecting seat connected to the cutting knife driving member, a knife piece pivotally connected to the connecting seat, and an elastic member which is arranged on the connecting seat and contacts the end of the knife piece which is not pivotally connected to the connecting seat , the cutting action is generated when the knife element is in contact with the fixed knife seat.

In one embodiment, the knife piece has a blade mounting seat pivotally connected to the connecting seat and connected to the elastic member, and a blade mounted on the blade mounting seat.

In one embodiment, the connecting seat has a slot, and the blade installation seat has an auxiliary limiting block inserted into the slot, and the width of the auxiliary limiting block is smaller than the width of the slot.

In one embodiment, the blade installation seat has a groove, and the blade has a handle inserted into the groove.

In one embodiment, the movable cutting tool has a stop plate disposed on the connecting seat for limiting the movable range of the end of the knife not pivotally connected to the connecting seat.

In one embodiment, the connecting seat has a shaft hole, and a shaft arranged in the shaft hole and assembled with the cutter.

In one embodiment, the connecting seat has a plurality of mounting structures respectively used for assembling the cutter driving member, and each of these mounting structures is selected from one of the following groups: a through hole, a screw hole, a positioning groove.

Through the aforementioned implementation of this creation, it has the following characteristics compared with the conventional technology: this creation makes the movable cutter as a moving blade have the connecting seat connected to the cutter driver, and the knife piece pivotally connected to the connecting seat, And the elastic member which is arranged on the connecting seat and contacts the end of the knife which is not pivotally connected to the connecting seat. This creation maintains the design of one static and one dynamic, and only needs to focus on the adjustment of the moving blade in the mechanism adjustment, so that the mechanism adjustment can be completed quickly. In addition, the structure of this creation is simpler and neater than conventional techniques.

20: Sewing machine cutter device

21: fixed knife seat

211: The second knife surface

22: Movable cutter

221: Connecting seat

222: Knife

223: Elastic parts

224: The first knife face

225: Blade mount

226: blade

227: missing slot

228: Auxiliary limit block

229: stop plate

230: Groove

231: handle

232: shaft hole

233: axis

234: Installation structure

235: perforation

236: storage tank

24: Cutter driver

30:Sewing machine

31: lower arm

311: Sewing platform

32: upper arm

321:Sewing components

33: Assemblies

Fig. 1 is a schematic diagram of the implementation of the sewing machine cutter device of the invention installed on the sewing machine.

Fig. 2 is a structural schematic diagram of the movable cutter of the sewing machine cutter device of the present invention.

Fig. 3, the structural exploded schematic view (1) of the movable cutter of the sewing machine cutter device of the present invention.

Fig. 4, the schematic diagram (two) of the movable cutter structure decomposition of the cutter device of the sewing machine of this creation.

Fig. 5 is a schematic diagram of the state of the cutter device of the sewing machine when the thread is not cut.

Fig. 6 is a schematic view of the thread cutting state of the cutter device of the inventive sewing machine.

Fig. 7 is a schematic diagram of shearing between the movable cutter and the fixed knife seat of the sewing machine cutter device of the present invention.

The detailed description and technical content of the new model are described as follows with reference to the drawings: please refer to Figures 1 to 5, this invention provides a sewing machine cutter device 20, the sewing machine cutter device 20 is installed in a sewing machine 30, and the sewing machine 30 includes the following Arm 31 , and an upper arm 32 opposite to the lower arm 31 , the lower arm 31 has a sewing platform 311 , and the upper arm 32 has a sewing assembly 321 that moves reciprocally relative to the sewing platform 311 . The sewing machine cutter device 20 includes a fixed knife seat 21 located on the lower arm 31, a movable knife 22 matched with the fixed knife seat 21, and a movable knife 22 arranged on the upper arm 32 and assembled with the movable knife 22. Cutter driver 24. The fixed knife base 21 is adjacent to the sewing platform 311 , the top edge of the fixed knife base 21 is lower than the surface edge of the sewing platform 311 , and the fixed knife base 21 can be directly observed from the lower arm 31 . Again, the movable cutter 22 is assembled with the cutter driver 24, and the movable cutter 22 is pushed by the cutter driver 24 to move toward the fixed knife seat 21, and the movable cutter 22 does not always contact the The fixed knife seat 21 cuts down towards the fixed knife seat 21 only when driven by the cutting knife driving member 24 . The cutter driver 24 can It is implemented in an electric or pneumatic manner. Those skilled in the art can already understand what the cutter driving member 24 refers to based on the common sense in this field, and will not repeat it here.

2 to 4, the movable cutter 22 of the sewing machine cutter device 20 has a connecting seat 221 connected to the cutter driver 24, and a connecting seat 221 pivotally connected to the connecting seat 221. The knife piece 222 and an elastic piece 223 disposed on the connecting seat 221 and contacting the end of the knife piece 222 that is not pivotally connected to the connecting seat 221 . This creation is assembled through the pivotal connection of the knife piece 222, and the elastic member 223 pushes one end of the knife piece 222, so that a first knife surface 224 of the knife piece 222 is not parallel to the fixed knife seat 21 under normal conditions. a second blade surface 211 . Also referring to Fig. 5 to Fig. 7, when the sewing machine cutter device 20 of this creation was implemented, the movable cutter 22 was promoted by the cutter driver 24 and moved towards the fixed knife seat 21. A shearing action occurs when the knife seats 21 come into contact. Specifically, the first knife surface 224 of the knife element 222 first contacts the second knife surface 211 of the fixed knife seat 21, and then the movable knife 22 continues to be cut because the fixed knife seat 21 does not move. The knife driver 24 pushes, and the end of the knife piece 222 pushed by the elastic piece 223 gradually presses the elastic piece 223 due to the aforementioned situation, so that the knife piece 222 and the fixed knife seat 21 produce a shearing action like scissors. On the other hand, in one embodiment of the invention, the elastic member 223 can be a spring.

In this way, the sewing machine cutter device 20 of the present invention changes the implementation of the cutter device, changing from the previous broken thread to the shearing thread, so that the user does not need to frequently adjust the cutter position due to the wear and tear of the cutter. In addition, this creation maintains the design of one static and one dynamic, and only needs to focus on the adjustment of the moving blade (ie, the movable cutter 22 ) in the mechanism adjustment, so that the mechanism adjustment can be completed quickly. In addition, the structure of this creation is simpler than usual.

Referring again to FIGS. 2 to 4 , in one embodiment, the knife element 222 may include multiple components. In this embodiment, the knife element 222 has a blade pivotally connected to the connecting seat 221 and connected to the elastic member 223 Mounting seat 225, and a blade 226 mounted on the blade mounting seat 225. In one embodiment, the connection seat 221 has a notch 227, the blade is installed The seat 225 has an auxiliary limiting block 228 inserted into the slot 227 . Further, the width of the auxiliary limiting block 228 is smaller than the width of the notch 227 , so as to cope with the displacement of the blade mounting seat 225 . In addition, in one embodiment, the movable cutter 22 has a stop plate 229 disposed on the connecting seat 221 , and the stop plate 229 is used to limit the movable range of the end of the knife part 222 that is not pivotally connected to the connecting seat 221 .

Referring back to FIGS. 2 to 4 , in one embodiment, the blade mount 225 has a groove 230 , and the blade 226 has a handle 231 inserted into the groove 230 .

Referring back to FIGS. 2 to 4 , in one embodiment, the connecting base 221 has a shaft hole 232 and a shaft 233 disposed in the shaft hole 232 and assembled with the cutter 222 . On the other hand, the blade mount 225 has a through hole 235 communicating with the shaft hole 232 for providing the shaft 233 to be inserted.

Referring again to FIGS. 1 to 4 , in one embodiment, the connection base 221 has a plurality of mounting structures 234 respectively used to assemble the cutter driving member 24, and each of these mounting structures 234 is selected from the following group One: a through hole, a screw hole, and a positioning groove. In addition to the purpose of connecting the cutter driver 24 , the mounting structures 234 can also be used to fine-tune the position of the connecting base 221 . For example, if the installation structures 234 include a plurality of the through holes, the user can select at least two of the plurality of the through holes for assembly according to the position required for actual assembly. If at least one of the mounting structures 234 is the positioning groove, the positioning groove can be formed along the edge of the connecting seat 221 , so that a part of the connecting member 33 can be inserted therein. Furthermore, it should be understood that the installation structures 234 are not restricted to be centrally arranged at one place of the connection base 221 , but can be distributed on the connection base 221 . In addition, the connecting seat 221 has a receiving groove 236 provided at one end of the elastic member 223 .

20: Sewing machine cutter device

21: fixed knife seat

22: Movable cutter

221: Connecting seat

225: Blade mount

226: blade

24: Cutter driver

30:Sewing machine

31: lower arm

311: Sewing platform

32: upper arm

321:Sewing components

Claims (8)

A sewing machine cutter device, installed in a sewing machine, the sewing machine includes a lower arm and an upper arm opposite to the lower arm, the lower arm has a sewing platform, and the upper arm has a sewing assembly that moves reciprocally relative to the sewing platform , the sewing machine cutter device includes a fixed knife seat arranged on the lower arm, a movable cutter matched with the fixed knife seat, and a movable cutter set on the upper arm to drive the movable knife to move toward the fixed knife seat A cutter drive member, the sewing machine cutter device is characterized by: The movable cutter has a connecting seat connected to the cutting knife driving member, a knife piece pivotally connected to the connecting seat, and an elastic member which is arranged on the connecting seat and contacts the end of the knife piece which is not pivotally connected to the connecting seat , the cutting action is generated when the knife element is in contact with the fixed knife seat. The sewing machine cutter device according to claim 1, wherein the knife part has a blade mounting seat pivotally connected to the connecting seat and connected to the elastic member, and a blade mounted on the blade mounting seat. According to claim 2, the sewing machine cutter device, wherein, the connecting seat has a slot, and the blade installation seat has an auxiliary limit block inserted into the slot, and the width of the auxiliary limit block is smaller than the slot width. The sewing machine cutter device as claimed in claim 2, wherein the blade installation seat has a groove, and the blade has a handle inserted into the groove. The sewing machine cutter device according to any one of Claims 1 to 4, wherein the movable cutter has a stop plate provided on the connecting seat to limit the movable range of the end of the knife not pivotally connected to the connecting seat. According to claim 5, the sewing machine cutter device, wherein, the connecting seat has a shaft hole, and a shaft arranged in the shaft hole and assembled with the knife piece. The sewing machine cutter device according to any one of Claims 1 to 4, wherein the connecting seat has a plurality of installation structures respectively used to assemble the cutter driver, and each of these installation structures is selected from the following groups One: a through hole, a screw hole, and a positioning groove. According to any one of claims 1 to 4, the sewing machine cutter device, wherein, the connecting seat has a shaft hole, and a shaft is arranged in the shaft hole and assembled with the knife piece.

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