TWI394876B - Sewing machine wire cutting device - Google Patents

Description

Sewing machine wire cutting device

The present invention relates to a sewing machine, and more particularly to a sewing machine wire cutting device.

In the conventional sewing machine, when the fabric is processed, since it is operated by the mechanical transmission method, when the upper and lower wires are cut, the two cutting members must be driven to cut the upper and lower wires by the linkage of the plurality of links, and the number is large. The connecting rods and corresponding parts are often too complicated to assemble, and the manufacturing cost can not be low.

Another sewing machine is designed to drive a plurality of gears and corresponding connecting rods by using one motor, thereby interlocking a cutting member to cut the upper and lower lines at the same time. Since only one set of cutting members is required to perform cutting operations, In the aforementioned sewing machine, the structure is simplified, however, since the structure of the gears and the connecting rods is still quite complicated, the cost in assembly and maintenance is also high.

Accordingly, it is an object of the present invention to provide a sewing machine wire cutting device which is simple in construction and low in cost.

Therefore, the sewing machine wire cutting device of the present invention comprises a substrate unit, a driving unit, a cutting unit and a linking unit.

The substrate unit includes a plate body, a first surface and a second surface respectively located on opposite surfaces of the plate body, and a slot extending in the moving direction and located in the board body and communicating with the first and second surfaces The driving unit is located at a side of the board adjacent to the first surface, and includes a fixing member connecting the board body, and a rotating member adjacent to the fixing member, the cutting unit is movably disposed along the moving direction In the plate body, the linkage unit is located on a side of the plate body adjacent to the first surface, and includes a pivot shaft connecting the plate body, and a pivotable portion and the two ends are respectively connected to the rotating member and a rotation module of the cutting unit, the rotation module has a gear member connected and rotating with the rotating member, a rod member engaged with the gear member and having a shaft disposed on the pivot shaft, and a shaft disposed on the pivot shaft And the two ends are respectively connected to the rod member and the swinging member of the cutting unit.

The utility model has the advantages that the driving unit and the linking unit which are simple in structure and low in cost enable the cutting unit to be moved by the rotating member and the swinging member, thereby achieving the effect of pulling and cutting the wire. .

The above and other technical contents, features and advantages of the present invention will be apparent from the following detailed description of the preferred embodiments.

Referring to Figures 1, 2 and 3, the preferred embodiment of the sewing machine wire cutting device of the present invention comprises a substrate unit 2, a driving unit 3, a cutting unit 4, and a linking unit 5.

The substrate unit 2 includes a plate body 21, a first surface 22 and a second surface 23 respectively located on opposite surfaces of the plate body 21, and a plate body 21 extending along a moving direction X and communicating with the first surface The through grooves 24 of the two surfaces 22, 23, the guiding grooves 25 parallel to the through grooves 24, and a cutting groove 26 provided in the plate body 21.

The driving unit 3 is located on a side of the board body 21 adjacent to the first surface 22, and includes a fixing member 31 connecting the board body 21 and a rotating member 32 adjacent to the fixing member 31. In this embodiment, the fixing member 31 and the rotating member 32 are a motor combination.

The cutting unit 4 is movably disposed on the plate body 21 along the moving direction X, and includes a connecting plate 41 on a side of the plate body 21 adjacent to the second surface 23, and a plate body 21 adjacent to the plate body 21. An extension member 42 extending from one side of the second surface 23 and extending from the connecting plate 41 in the moving direction X, a connecting rod 43 connecting the connecting plate 41 and passing through the through slot 24, and connecting the connecting plate 41 A guide rod 44 that passes through the guide groove 25 and a cutter module 45.

The extension member 42 has a hook line groove 421 on the opposite side of the connecting plate 41 and corresponding to the cutting groove 26.

The tool module 45 has a tool holder 451 mounted on the plate body 21 and disposed corresponding to the cutting groove 26, a cutter 452 mounted on the tool holder 451 and located in the cutting groove 26, and a tool mounted on the plate body. 21 and correspondingly the cutting groove 26 is provided to limit the positioning member 453 in which the extension member 42 does not deflect upward. In the embodiment, the tool holder 451 and the positioning member 453 are fixed to the plate body 21 from a side of the plate body 21 adjacent to the second surface 23 .

The linkage unit 5 is located on a side of the plate body 21 adjacent to the first surface 22, and includes a pivot shaft 51 connecting the plate body 21, and a pivoting member 51 is rotatable about the pivot shaft 51, and the two ends are respectively connected to the rotating member 32 and a rotation module 52 of the cutting unit 4.

The rotating module 52 has a gear member 521 connected to and rotating with the rotating member 32, a rod member 522 meshed with the gear member 521 and axially disposed and rotatable about the pivot 51, and a shaft disposed on the pivot The shaft 51 and the two ends are respectively connected to the rod member 522 and the swinging member 523 of the connecting rod 43 of the cutting unit 4. In this embodiment, the rod member 522 is fan-shaped, and the teeth are located on the curved side.

The rod member 522 has a receiving portion 524. The swinging member 523 has a fixing portion 525 received in the receiving groove 524, and a sliding groove 526 through which the connecting rod 43 is slidably disposed.

2, 4, and 5, the cutting unit 4 is movable between the extended position and a retracted position relative to the substrate unit 2 along the moving direction X.

When the cutting unit 4 is in the extended position (see FIGS. 5 and 6), the rotating member 32 is rotated at an angle with respect to the fixing member 31, and the gear member 521, the rod member 522 and the swinging member 523 are interlocked. When the oscillating member 523 rotates, the connecting rod 43 located in the sliding groove 526 is moved in the moving direction X in the sliding groove 526, thereby driving the connecting member 41 and the extending member 42 to move. The guide rod 44 of 25 is also moved in the moving direction X to maintain balance, and the hook line groove 421 is relatively far from the cutting groove 26.

Conversely, when the cutting unit 4 is in the retracted position (see FIG. 4), the rotating member 32 is inverted at an angle with respect to the fixing member 31, and the gear member 521, the rod member 522 and the swinging member 523 are reversed. The deflection, and the extension member 42 and the extension member 42 are moved in the opposite direction, so that the hook line groove 421 is relatively adjacent to the cutting groove 26.

In use, when the sewing machine (not shown) is processed until the cloth needs to be changed, the cutting unit 4 is driven to move to the extended position, and the upper and lower lines during processing are hooked in the hook line groove 421, and then The cutting unit 4 is driven to move to the retracted position, at which time the upper and lower lines are pulled into the cutting groove 26, and are cut by the cutter 452 to achieve the effect of cutting the wire.

In summary, the driving unit 3 interlocks the linkage unit 5 to generate a deflection, so that the cutting unit 4 is driven by the rotating member 32 and the swinging member 523 to move, thereby achieving the effect of pulling and cutting the wire. Compared with the existing sewing machine, the structure of the present invention is simple and low in cost, so that the object of the present invention can be achieved.

The above is only the preferred embodiment of the present invention, and the scope of the invention is not limited thereto, that is, the simple equivalent changes and modifications made by the scope of the invention and the description of the invention are All remain within the scope of the invention patent.

2. . . Substrate unit

twenty one. . . Plate body

twenty two. . . First surface

twenty three. . . Second surface

twenty four. . . Grooving

25. . . Guide slot

26. . . Cutting slot

3. . . Drive unit

31. . . Fastener

32. . . Rotating piece

4. . . Cutting unit

41. . . Connection plate

42. . . Extension

421. . . Hook line slot

43. . . Connecting rod

44. . . Guide rod

45. . . Tool module

451. . . Tool holder

452. . . Tool

453. . . Positioning member

5. . . Linkage unit

51. . . Pivot

52. . . Rotating module

521. . . Gear member

522. . . Rodent

523. . . Swinging piece

524. . . Locating slot

525. . . Fixed part

526. . . Sliding slot

X. . . Direction of movement

Figure 1 is a perspective assembled view of a preferred embodiment of a sewing machine wire cutting device of the present invention;

Figure 2 is an exploded perspective view of the preferred embodiment;

Figure 3 is a bottom plan view of the preferred embodiment;

Figure 4 is a partial bottom view of the preferred embodiment, illustrating a cutting unit in an extended position;

Figure 5 is a view similar to Figure 4 illustrating the cutting unit in a retracted position;

Figure 6 is another perspective assembled view of the preferred embodiment.

twenty one. . . Plate body

twenty three. . . Second surface

twenty four. . . Grooving

25. . . Guide slot

26. . . Cutting slot

3. . . Drive unit

31. . . Fastener

32. . . Rotating piece

4. . . Cutting unit

41. . . Connection plate

42. . . Extension

421. . . Hook line slot

43. . . Connecting rod

44. . . Guide rod

45. . . Tool module

451. . . Tool holder

452. . . Tool

453. . . Positioning member

5. . . Linkage unit

51. . . Pivot

52. . . Rotating module

521. . . Gear member

522. . . Rodent

523. . . Swinging piece

524. . . Locating slot

525. . . Fixed part

526. . . Sliding slot

X. . . Direction of movement

Claims (4)

A sewing machine wire cutting device comprises: a substrate unit comprising a plate body, a first surface and a second surface respectively located on opposite surfaces of the plate body, and a plate body extending along a moving direction and a driving unit connecting the first surface and the second surface; a driving unit located on a side of the first adjacent surface of the board body, and comprising a fixing member connecting the board body, and a rotating member adjacent to the fixing member; a cutting unit is movably disposed on the plate body along the moving direction; and a linking unit is located at a side of the plate body adjacent to the first surface, and includes a pivot shaft connecting the plate body, and a Rotating around the pivoting end and connecting the rotating member and the rotating module of the cutting unit respectively, the rotating module has a gear member connected and rotating with the rotating member, and a shaft member is engaged with the gear member and the shaft is disposed on the shaft a pivoting rod member, and a pivoting member disposed on the pivot shaft and connected to the rod member and the cutting unit respectively; the cutting unit includes a side of the plate body adjacent to the second surface a connecting plate, one adjacent to the plate body An extension member extending from the connecting plate in the moving direction, and a connecting rod passing through the through slot and connecting the connecting plate and the swinging member, the rod member having a receiving groove, the swinging The member has a fixing portion accommodated in the receiving groove, and a sliding groove through which the connecting rod is slidably disposed. The sewing machine wire cutting device according to claim 1, wherein the extension member has a hook line on a side opposite to the connecting plate. a groove, the substrate unit further includes a cutting groove disposed on the plate body corresponding to the hook line groove, and the cutting unit is movable between the extended position and the retracted position relative to the substrate unit along the moving direction, and the extending In the position, the hook line slot is relatively far from the cutting slot, and in the retracted position, the hook line slot is relatively adjacent to the cutting slot. The sewing machine wire cutting device according to the second aspect of the invention, wherein the cutting unit further comprises a cutter module, the cutter module having a cutter seat mounted on the plate body and disposed corresponding to the cutting groove, and A tool mounted to the tool holder. The sewing machine wire cutting device according to the first aspect of the invention, wherein the substrate unit further comprises a guiding groove parallel to the through slot, the cutting unit further comprising a connecting connecting plate and passing along the A guide rod for guiding the movement of the groove.