CN215163634U - Bobbin group of sewing machine and sewing machine - Google Patents
Bobbin group of sewing machine and sewing machine Download PDFInfo
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- CN215163634U CN215163634U CN202120517941.8U CN202120517941U CN215163634U CN 215163634 U CN215163634 U CN 215163634U CN 202120517941 U CN202120517941 U CN 202120517941U CN 215163634 U CN215163634 U CN 215163634U
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Abstract
The utility model relates to a sewing machine's shuttle peg group and sewing machine relates to sewing machine technical field for prevent that line or yarn from droing from the line hole in bight. The utility model discloses a sewing machine's shuttle peg group, including bobbin case and bight, the second end of bight is provided with the structure that prevents the line and drop, the structure that prevents the line and drop is used for making the follow the line that stretches out in the bobbin case passes wherein to prevent that the line from dropping wherein.
Description
Technical Field
The utility model relates to a sewing machine technical field especially relates to a sewing machine's shuttle peg group and sewing machine.
Background
Some sewing machines are currently equipped with automatic under-thread feeders which allow automatic replacement of the bobbin on which the thread is rewound, when the thread wound on the bobbin is nearly exhausted. Wherein the yarn on the bobbin needs to extend out of the bobbin case and penetrate into the thread hole at the upper corner of the bobbin case. In the above process of applying the yarn to the corner portion of the bobbin case, the yarn on the bobbin is extended from the bobbin case and kept in a tensed state, and the bobbin case is moved in the axial direction so that the yarn can be caught in the thread hole of the corner portion on the bobbin case. In practical use, it has been found that the yarn caught in the string hole of the corner portion easily drops off from the string hole of the corner portion, and it takes additional time to return it.
SUMMERY OF THE UTILITY MODEL
The utility model provides a sewing machine's shuttle peg group and sewing machine for prevent that line or yarn from droing from the line hole at bight.
The utility model provides a bobbin group of a sewing machine, which comprises a bobbin case and a corner part, wherein the first end of the corner part is connected with the bobbin case, and the second end of the corner part is positioned at the outer side of the bobbin case;
wherein the second end of the corner portion is provided with a thread drop prevention structure for passing therethrough a thread protruding from the bobbin case and preventing the thread from dropping therefrom.
In one embodiment, the wire drop prevention structure includes a curved portion and a bottom portion, the bottom portion being connected to the second end of the corner portion;
the first end of the curved portion is connected to the bottom portion, the second end of the curved portion is curved toward the bottom portion to form a thread hole, and a thread extending from the bobbin case passes around the second end of the curved portion and enters the thread hole.
In one embodiment, the bight portion, the base portion and the corner portion are a unitary structure;
the structure for preventing the wire from falling off further comprises a first side part, and the first side part and the bending part are respectively connected with the bottom part; the first side portion has a groove recessed toward a second end away from the curved portion, the second end of the curved portion is at least partially disposed in the groove, and a thread protruding from the bobbin case may pass around the second end of the curved portion and enter the thread hole via a portion between the second end of the curved portion and the groove.
In one embodiment, the base and the corner are of split construction;
the bottom is provided with a through hole, and at least one part of the second end of the bending part is arranged in the through hole; a gap is provided between the second end of the curved portion and the second end sidewall of the corner portion, and a thread protruding from the bobbin case may pass around the second end of the curved portion and enter the thread hole via the gap and a portion between the second end of the curved portion and the through hole.
In one embodiment, the wire drop prevention structure includes a bent plate and a connection plate connected to the second end of the corner;
the first end of the bent plate is connected with the connecting plate, the second end of the bent plate is bent towards the connecting plate to form a wire hole, and at least one part of the second end of the bent plate is in elastic contact with the surface of the connecting plate;
the second end of the curved portion is forced away from the surface of the connecting plate to form a first passage into the thread hole through which a thread extending from the bobbin case may enter.
In one embodiment, the thread drop prevention structure comprises a first blocking portion and a second blocking portion connected, the first blocking portion having a first loop-shaped structure and a first mating end, the second blocking portion having a second loop-shaped structure for mating with the first loop-shaped structure and a second mating end for mating with the first mating end;
the first and second loop structures form a thread aperture into which thread extending from the bobbin case enters between the first and second mating ends when the first and second blocking portions are mated.
In one embodiment, the first mating end is configured with a recessed end and the second mating end is configured with a raised end, the raised end being disposed in the recessed end with a gap therebetween forming a second channel into the wire aperture.
In one embodiment, the second stopping portion is rotatably connected with the first stopping portion through an elastic body, and the elastic body enables the first matching end to be in contact with the second matching end in a natural state; the elastomeric body separates the first mating end from the second mating end in a compressed state, thereby forming a third channel into the wire aperture.
In one embodiment, the bobbin case is provided with a U-shaped opening for extending the thread in the bobbin case.
According to a second aspect of the present invention, the present invention provides a sewing machine with an automatic lower thread supply device, which comprises the bobbin case of the sewing machine described above.
Compared with the prior art, the utility model has the advantages that, through set up the structure that prevents the line and drop at the second end in bight, can make the line that stretches out from the bobbin case pass wherein easily to prevent that the line from dropping from wherein.
Drawings
The present invention will be described in more detail hereinafter based on embodiments and with reference to the accompanying drawings.
Fig. 1 is a schematic perspective view of a bobbin according to a first embodiment of the present invention;
FIG. 2a is a schematic perspective view of the structure for preventing the thread from falling off shown in FIG. 1;
FIG. 2b is a front view of the thread drop prevention structure shown in FIG. 1;
fig. 3 is a schematic perspective view of a bobbin in a second embodiment of the present invention;
FIGS. 4 and 5a are schematic perspective views of the wire falling prevention structure shown in FIG. 3;
FIG. 5b is a front view of the thread drop prevention structure shown in FIG. 5 a;
fig. 6 is a schematic perspective view of a bobbin in a third embodiment of the present invention;
FIG. 7 is a schematic perspective view of the wire-off prevention structure shown in FIG. 6;
FIG. 8 is a front view of the thread drop prevention structure shown in FIG. 6;
fig. 9 is a schematic perspective view of a bobbin in a fourth embodiment of the present invention;
FIGS. 10 and 11 are partial perspective views of the wire-drop preventing structure shown in FIG. 9;
FIG. 12 is a schematic view of a half-section of the wire-drop prevention structure shown in FIG. 9;
fig. 13 is a schematic perspective view of a bobbin in a fifth embodiment of the present invention;
FIG. 14 is a partial perspective view of the thread drop prevention structure shown in FIG. 13;
FIG. 15 is a partial perspective view of the thread drop prevention structure shown in FIG. 13; wherein the second blocking portion is not shown;
fig. 16 is a schematic view of the second stopper of the structure for preventing the wire from falling off shown in fig. 13.
Reference numerals:
100-bobbin case; 101-a U-shaped opening;
200-corner; 201-first end of corner; 202-a second end of the corner;
300,400,500,600, 700-structures to prevent thread shedding;
301, 401-bend; 301a,401 a-a first end of the bend; 301b, 401 b-a second end of the bend;
302, 402-bottom;
303,403,503,603,703-wire hole;
304-a first side; 305-a groove;
404-a second end sidewall of the corner; 405-a via;
501-bending a plate; 502-a connection plate;
501 a-a first end of a curved plate; 501 b-bending the second end of the plate;
610, 710-first blocking portion; 620, 720-a second blocking part; 630-a second channel;
611,711-first annular structure; 612,712-a first mating end; 730-a third channel; 740-an elastomer; 750-articulated shaft;
621,721 — second annular structure; 622,722-second mating end.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings.
As shown in fig. 1 to 16, according to a first aspect of the present invention, the present invention provides a bobbin group of a sewing machine, particularly an automatic lower thread supplying device for a sewing machine. The bobbin case set includes a bobbin case 100 configured as a substantially cylindrical case structure, and a corner 200, the bobbin case 100 having a bobbin (not shown) disposed therein, wherein a thread (e.g., yarn) is wound around the bobbin and protrudes from a U-shaped opening 101 (to be described later) of the bobbin case 100.
A first end 201 of the corner is attached to the bobbin case 100, a second end 202 of the corner is located outside the bobbin case 100, and the second end 202 of the corner is located adjacent the U-shaped opening 101, and a thread extending from the U-shaped opening 101 of the bobbin case 100 can pass through the second end 202 of the corner. Wherein the second end 202 of the corner portion is provided with a thread drop prevention structure 300, the thread drop prevention structure 300 for passing the thread protruding from the bobbin case 100 therethrough and preventing the thread from dropping therefrom.
The structure 300 for preventing a wire from falling off according to the present invention has various implementation manners, and each embodiment will be described in detail below with reference to the accompanying drawings.
Example 1
As shown in fig. 1, 2a and 2b, the wire falling prevention structure 300 includes a bent portion 301 and a bottom portion 302, and the bottom portion 302 is connected to the second end 202 of the corner portion. The first end 301a of the curved portion is connected to the bottom portion 302, and as shown in fig. 2a and 2b, the second end 301b of the curved portion is curved toward the bottom portion 302 to form a wire hole 303.
The structure 300 for preventing the thread from falling off further includes a first side portion 304, and the first side portion 304 and the bent portion 301 are connected to the bottom portion 302, respectively. The first side portion 304 has a recess 305 recessed towards the second end 301b remote from the bend, as shown in fig. 2a and 2b, the second end 301b of the bend is at least partially disposed in the recess 305, i.e. a portion of the second end 301b of the bend is embedded in the first side portion 304. The thread protruding from the bobbin case 100 can pass around the second end 301b of the bending portion and enter the thread hole 403 via the portion between the second end 301b of the bending portion and the groove 305, but due to the interference of the second end 301b of the bending portion with the thread in the first side portion 304 and the downward bending structure of the second end 301b of the bending portion, the thread in the thread hole 303 is difficult to pass around the second end 301b of the bending portion reversely and escape from the thread hole 303, thereby playing a role of preventing the thread from falling off.
Further, to facilitate entry of the wire into the wire hole 303 bypassing the second end 301b of the bend, the second end 301b of the bend is configured as a pointed tip to avoid possible collision and obstruction of the wire as it enters the wire hole 303.
The depth of embedding of the second end 301b of the bent portion into the first side portion 304 may be set as desired, for example, may be set to 0.2 mm. It should be noted that the second end 301b of the curved portion needs to have a certain distance from the inner wall of the groove 305, and the distance is used as a passage into the string hole 303 so as to facilitate the string to be inserted into the string hole 303. In other words, the second end 301b of the bent portion cannot contact the inner wall of the groove 305, which would otherwise make it difficult for the wire to enter the wire hole 303.
In the present embodiment, since the bent portion 301 is not bent to a great extent (compared to embodiment 2 described below), the bent portion 301, the bottom portion 302, and the corner portion 200 may be provided as an integrated structure, that is, the wire falling-off prevention structure 300 and the corner portion 200 may be integrally formed.
As shown in fig. 2a and 2b, the second end 301b of the bending portion is bent to form a ring-shaped bending portion 301, and it should be understood that the bending portion 301 may be bent into other shapes, which is not limited by the present invention.
The wire hole 303 formed by bending the second end 301b of the bent portion has a circular structure, and the radius of the wire hole 303 may be 0.7mm, for example, so as to provide a sufficient space for the wire to move in the wire hole 303.
As shown in fig. 1, the bobbin case 100 is provided with a U-shaped opening 101. The U-shaped opening 101 is used to extend the thread in the bobbin case 100 out of the bobbin case 100 so that it can enter the thread hole 303.
Example 2
As shown in fig. 3,4, 5a and 5b, the wire falling prevention structure 400 of the present embodiment includes a curved portion 401 and a bottom portion 402, similar to the above embodiment 1, and the bottom portion 402 is connected to the second end 202 of the corner portion. As shown in fig. 4 and 5, a first end 401a of the bending portion is connected to the bottom portion 402, and a second end 401b of the bending portion is bent toward the bottom portion 402 to form a wire hole 403.
Unlike embodiment 1, the bottom portion 402 of this embodiment is provided with a through hole 405, and the second end 401b of the bending portion is at least partially disposed in the through hole 405 (as shown in fig. 5 b).
As shown in fig. 4, a gap (for example, 0.6mm may be set) is provided between the second end 401b of the curved portion and the second end sidewall 404 of the corner portion, and the thread extending from the bobbin case 100 passes through the gap first and then passes around a portion between the second end 401b of the curved portion and the through hole 405, i.e., passes around the second end 401b of the curved portion and enters the thread hole 403.
The depth of insertion of the second end 401b of the bent portion into the through hole 405 may be set as desired, for example, may be set to 0.2mm, so that the wire can easily bypass the portion between the second end 401b of the bent portion and the through hole 405. The thread entering the thread hole 403 is difficult to escape from the thread hole 403 by reversely passing around the second end 401b of the curved portion due to the curved structure of the second end 401b of the curved portion and the interference of the thread by the insertion of the second end 401b of the curved portion into the through hole 405.
As shown in fig. 5a and 5b, the second end 401b of the bending portion is bent to form a ring-shaped bending portion 401, and it is understood that the bending portion 401 may be bent to other shapes, which is not limited by the present invention.
In the present embodiment, the bottom portion 402 and the corner portion 200 are split structures, that is, the wire falling-off prevention structure 400 and the corner portion 200 are split structures. The corner portion 200 may be notched to match the bottom portion 402 and the bottom portion 402 may be connected to the notch of the corner portion 200 in various known ways.
Further, as shown in fig. 5a, in order to facilitate the entry of the wire into the wire hole 403 bypassing the second end 401b of the curved portion, the second end 401b of the curved portion is provided as a pointed end to reduce possible collision and obstruction of the wire entry.
As shown in fig. 3, the bobbin case 100 is provided with a U-shaped opening 101. The U-shaped opening 101 is used to extend the thread in the bobbin case 100 out of the bobbin case 100 so that it can enter the thread hole 403.
Example 3
As shown in fig. 6-8, the wire drop prevention structure 500 includes a bent plate 501 and a connection plate 502, and the connection plate 502 is connected to the second end 202 of the corner.
A first end 501a of the bent plate is connected to the connection plate 502, and a second end 501b of the bent plate is bent toward the connection plate 502 to form a wire hole 503. Unlike the above-described embodiment, at least a portion of the second end 501b of the bent plate is in elastic contact with the surface of the connection plate 502. Thus, the second end 502b of the flexure will be forced away from the surface of the web 501, thereby forming a first passage into the thread aperture 503, into which thread extending from the bobbin case 100 may enter.
As shown in fig. 8, the wire enters from the starting point a, where it causes the second end 502B of the curved portion to be temporarily spaced away from the surface of the connecting plate 501, thereby forming a first passage through which the wire passes and around the second end 501B of the curved plate into the wire hole 530, i.e., to point B. The dashed line between points a and B in fig. 8 shows the threading path of the thread into the thread hole 630. When the thread has entered the thread hole 530, the second end 502b of the bent portion comes into contact with the surface of the connection plate 501 again by the restoring force of the second end 502b of the bent portion itself, thereby closing the first passage, so that the thread in the thread hole 530 cannot be dropped out of the thread hole 530.
The connecting plate 502 and the corner 200 in this embodiment are provided in a split structure, and they can be connected by various means known in the art. Or the connecting plate 502 and the corner 200 in this embodiment may be provided as an integral structure.
As shown in fig. 7, the second end 502b of the bending portion is bent to form a structure of a substantially annular bent plate 501; it is understood that the curved plate 501 may be curved into other shapes, and the present invention is not limited thereto. Further, the second end 502b of the curved portion may also be configured as a tip.
As shown in fig. 6, the bobbin case 100 is provided with a U-shaped opening 101. The U-shaped opening 101 is used to extend the thread in the bobbin case 100 out of the bobbin case 100 so that it can enter the thread hole 503.
Example 4
As shown in fig. 9-12, the thread drop prevention structure 600 includes a first stopper portion 610 and a second stopper portion 620 connected, the first stopper portion 610 having a first annular structure 611 and a first mating end 612; the second stop 620 has a second loop-shaped structure 621 for mating with the first loop-shaped structure 611 and a second mating end 622 for mating with the first mating end 612.
The first loop structure 611 forms a string aperture 603 with the second loop structure 621 when the first and second stops 610, 620 are mated; while the first mating end 612 mates with the second mating end 622, a thread extending from the shuttle housing 100 may enter the thread aperture 603 between the first mating end 612 and the second mating end 622.
Specifically, as shown in fig. 10 and 11, the first mating end 612 is configured with a recessed end, the second mating end 622 is configured with a raised end, the raised end is disposed in the recessed end, and a gap therebetween forms a second channel 630 into the wire entry aperture.
As shown in fig. 12, the wire enters the second channel 630 from a point a of origin, passes around the second mating end 622 (i.e., the end having the protrusion) in the second channel 630, and enters the wire aperture 630, i.e., to a point B. The dashed line between points a and B in fig. 12 shows the threading path of the thread into the thread hole 630. The string cannot pass through the second passage 630 in the opposite direction to escape from the string hole 630 due to the interfitting ends of the protrusion and the recess.
In the present embodiment, the thread drop prevention structure 600 may be formed integrally with the corner portion 200, and both may also be formed integrally with the bobbin case 100.
As shown in fig. 9, the bobbin case 100 is provided with a U-shaped opening 101. The U-shaped opening 101 is used to extend the thread in the bobbin case 100 out of the bobbin case 100 so that it can enter the thread hole 603.
Example 5
As shown in fig. 13 to 16, the thread drop prevention structure 700 is similar to that of embodiment 4 described above, and includes a first blocking portion 710 and a second blocking portion 720 connected, the first blocking portion 710 having a first annular structure 711 and a first mating end 712; the second stop 720 has a second loop structure 721 and a second mating end 722.
The second stopper portion 720 is rotatably connected to the first stopper portion 710 by an elastic body 740, the elastic body 740 naturally causes the first coupling end 712 to contact the second coupling end 722, and the first annular structure 711 and the second annular structure 721 form the wire hole 703. The elastomer 740 separates the first mating end 712 from the second mating end 722 in a compressed state, thereby forming a third channel 730 into the wire entry hole.
As shown in fig. 15, the elastic body 740 is disposed in the mounting hole of the first blocking part 710. The lower end of the second blocking portion 720 is rotatably coupled to the first blocking portion 710 by a hinge shaft 750, and when the second blocking portion 720 is rotated toward the first blocking portion 710, the elastic body 740 is compressed and the first coupling end 712 is separated from the second coupling end 722, thereby forming a third passage 730 through which the wire can pass.
Specifically, as shown in fig. 16, when the thread enters from the starting point a, the thread drives the second blocking portion 720 to rotate towards the first blocking portion 710, so as to form a third channel 730, and the thread can enter the thread hole 703 from the third channel 730, that is, reach a point B. When a thread enters the thread hole 703, the second stopper 720 is rotated away from the first stopper 710 by the elastic body 740 so that the first coupling end 712 contacts the second coupling end 722 and the thread cannot fall out of the thread hole 703 even if the third passage 730 is closed.
As shown in fig. 13, the bobbin case 100 is provided with a U-shaped opening 101. The U-shaped opening 101 is used to extend the thread in the bobbin case 100 out of the bobbin case 100 so that it can enter the thread hole 703.
According to a second aspect of the present invention, there is provided a sewing machine having an automatic lower thread supplying apparatus, comprising one of the bobbin groups of the sewing machine according to the above-described respective embodiments. The automatic under-thread feeding device is used for automatically replacing the bobbin which is wound with the yarn again when the yarn wound on the bobbin is reduced.
While the invention has been described with reference to a preferred embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. In particular, the technical features mentioned in the embodiments can be combined in any way as long as there is no structural conflict. The present invention is not limited to the particular embodiments disclosed herein, but encompasses all technical solutions falling within the scope of the claims.
Claims (10)
1. A bobbin set of a sewing machine, comprising a bobbin case and a corner portion, a first end of the corner portion being connected to the bobbin case, a second end of the corner portion being located outside the bobbin case;
wherein the second end of the corner portion is provided with a thread drop prevention structure for passing therethrough a thread protruding from the bobbin case and preventing the thread from dropping therefrom.
2. The bobbin group for a sewing machine according to claim 1, wherein the thread drop preventing structure includes a curved portion and a bottom portion, the bottom portion being connected to the second end of the corner portion;
the first end of the curved portion is connected to the bottom portion, the second end of the curved portion is curved toward the bottom portion to form a thread hole, and a thread extending from the bobbin case passes around the second end of the curved portion and enters the thread hole.
3. The bobbin group of a sewing machine according to claim 2, wherein the curved portion, the bottom portion and the corner portion are of a unitary construction;
the structure for preventing the wire from falling off further comprises a first side part, and the first side part and the bending part are respectively connected with the bottom part; the first side portion has a groove recessed toward a second end away from the curved portion, the second end of the curved portion is at least partially disposed in the groove, and a thread protruding from the bobbin case may pass around the second end of the curved portion and enter the thread hole via a portion between the second end of the curved portion and the groove.
4. The bobbin group for a sewing machine according to claim 2, wherein the bottom portion and the corner portion are of a split structure;
the bottom is provided with a through hole, and at least one part of the second end of the bending part is arranged in the through hole; a gap is provided between the second end of the curved portion and the second end sidewall of the corner portion, and a thread protruding from the bobbin case may pass around the second end of the curved portion and enter the thread hole via the gap and a portion between the second end of the curved portion and the through hole.
5. The bobbin group for a sewing machine according to claim 1, wherein the thread falling prevention structure includes a bending plate and a connecting plate, the connecting plate being connected to the second end of the corner portion;
the first end of the bent plate is connected with the connecting plate, the second end of the bent plate is bent towards the connecting plate to form a wire hole, and at least one part of the second end of the bent plate is in elastic contact with the surface of the connecting plate;
the second end of the curved portion is forced away from the surface of the connecting plate to form a first passage into the thread hole through which a thread extending from the bobbin case may enter.
6. The bobbin set for a sewing machine according to claim 1, wherein the thread drop prevention structure comprises a first blocking portion and a second blocking portion connected, the first blocking portion having a first loop configuration and a first mating end, the second blocking portion having a second loop configuration for mating with the first loop configuration and a second mating end for mating with the first mating end;
the first and second loop structures form a thread aperture into which thread extending from the bobbin case enters between the first and second mating ends when the first and second blocking portions are mated.
7. The bobbin set of a sewing machine of claim 6 wherein the first mating end is configured as a recessed end and the second mating end is configured as a raised end, the raised end being disposed in the recessed end with a gap therebetween forming a second passage into the thread aperture.
8. The bobbin set for a sewing machine according to claim 6, wherein the second blocking portion is rotatably connected to the first blocking portion by an elastic body which naturally brings the first coupling end into contact with the second coupling end; the elastomeric body separates the first mating end from the second mating end in a compressed state, thereby forming a third channel into the wire aperture.
9. The bobbin group for a sewing machine according to any of claims 1 to 8, wherein the bobbin case is provided with a U-shaped opening for letting out the thread in the bobbin case.
10. A sewing machine with an automatic lower thread feeding device, characterized by comprising a bobbin set of the sewing machine according to any one of claims 1 to 9.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120517941.8U CN215163634U (en) | 2021-03-11 | 2021-03-11 | Bobbin group of sewing machine and sewing machine |
| TW111108518A TW202237925A (en) | 2021-03-11 | 2022-03-09 | Shuttle peg set of sewing machine and sewing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120517941.8U CN215163634U (en) | 2021-03-11 | 2021-03-11 | Bobbin group of sewing machine and sewing machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215163634U true CN215163634U (en) | 2021-12-14 |
Family
ID=79415198
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120517941.8U Active CN215163634U (en) | 2021-03-11 | 2021-03-11 | Bobbin group of sewing machine and sewing machine |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN215163634U (en) |
| TW (1) | TW202237925A (en) |
-
2021
- 2021-03-11 CN CN202120517941.8U patent/CN215163634U/en active Active
-
2022
- 2022-03-09 TW TW111108518A patent/TW202237925A/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| TW202237925A (en) | 2022-10-01 |
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