CN214694588U

CN214694588U - Double-needle sewing machine and needle assembly thereof

Info

Publication number: CN214694588U
Application number: CN202120536345.4U
Authority: CN
Inventors: 伊藤雅美; 金彩珍
Original assignee: Wujiang Yangguang Science And Technology Sewing Machine Co ltd
Current assignee: Wujiang Yangguang Science And Technology Sewing Machine Co ltd
Priority date: 2021-03-15
Filing date: 2021-03-15
Publication date: 2021-11-12
Anticipated expiration: 2031-03-15

Abstract

The utility model discloses a two-needle sewing machine and eedle subassembly thereof. The needle assembly comprises a needle bar connecting seat and two needles, wherein at least one needle can move up and down relative to the needle bar connecting seat and has a first position and a second position above the first position; the needle assembly has a first working state and a second working state, when the needle assembly is in the first working state, one of the needles is in the first position, and the needle points of the two needles are kept flat; when the needle assembly is in the second working state, one of the needles is in the second position and the needle point is higher than the needle point of the other needle. The utility model discloses can not have unnecessary stitch seam and comparatively pleasing to the eye when making up corner seam.

Description

Double-needle sewing machine and needle assembly thereof

Technical Field

The utility model belongs to the sewing machine field, concretely relates to two-needle sewing machine and eedle subassembly thereof.

Background

A sewing machine is a machine that uses one or more sewing threads to form one or more stitches in a material to be sewn, thereby interweaving or stitching one or more layers of material. In the production process, in order to improve sewing efficiency or sew two equidistant sewing threads, a double-needle sewing machine is generally adopted for sewing.

A general two-needle sewing machine is constructed as shown in fig. 1, and includes a needle bar 1, a cartridge 2, a left needle 31', a right needle 32', and a screw 4. When in use, the sewing machine can simultaneously carry out double-thread parallel sewing, and the sewn parallel stitches are shown in figure 2. Based on actual needs, the angle and direction of sewing are generally required to be changed to sew the corner stitch, and the ideal effect of the corner stitch is shown in fig. 3 by taking 90 degrees as an example. In operation, however, as shown in fig. 4, left needle 31 'and right needle 32' are respectively placed in first operating position A, B, sewing is carried out in the X direction, and are respectively suspended in second operating position C, D, and left needle 31 'and right needle 32' stitch stitches AC and BD, respectively. The right needle 32 'is kept stationary at the point C, the cloth is rotated 90 degrees counterclockwise with the point C as the center, the left needle 31' enters the third working position E, and the stitch DE is sewn in the process. The third working position of the right needle 32 'is C' coinciding with the second working position C. Then sewing along the Y direction. It can be seen that the results after completion are compared with fig. 2, and the redundant traces are FD, DE and EF. If the sewing effect as shown in fig. 3 is required, the left needle 31' is stopped when the needle is rotated from the second working position to the third working position. However, because of the operating characteristics of the conventional two-needle sewing machine, i.e., two needles must work simultaneously, the left needle 31' cannot stop working when the operating position is switched, and extra stitches are inevitably carried when corner stitches are sewn, which has a great limitation in the practical application process.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to solve exist among the above-mentioned prior art not enough and problem, provide a two-needle sewing machine's eedle subassembly, can select two-needle sewing or single-needle sewing in the use, the corner stitch seam that the sewing was made does not have unnecessary stitch seam and comparatively pleasing to the eye.

Another object of the present invention is to provide a two-needle sewing machine, which can select two-needle sewing or single-needle sewing in the using process, and the corner stitch seam made by sewing has no unnecessary stitch seam and is relatively beautiful.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a machine needle assembly of a double-needle sewing machine comprises a needle rod connecting seat capable of being connected with a needle rod and two machine needles arranged on the needle rod connecting seat. The two needles are arranged in parallel, and at least one needle can move up and down relative to the needle rod connecting seat and has a first position and a second position above the first position;

the needle assembly has a first working state and a second working state, when the needle assembly is in the first working state, one of the needles is in the first position, and the needle points of the two needles are kept flat; when the needle assembly is in the second working state, one of the needles is in the second position, and the needle point of the needle assembly is higher than that of the other needle.

Preferably, the two needles can respectively move up and down relative to the needle bar connecting seat to respectively have the first position and the second position, and when the needle assembly is in the first working state, the two needles are both in the first positions; when the needle assembly is in the second working state, one of the needles is in its first position and the other needle is in its second position.

More preferably, the needle is provided on the needle bar connecting base to be movable up and down by a clutch.

Furthermore, the clutch device comprises a sliding block, the needle is arranged on the sliding block, and the sliding block is arranged on the needle rod connecting seat in a vertically sliding manner; the clutch device also comprises a locking piece used for locking the sliding block on the needle bar connecting seat when the needle reaches the first position or the second position.

Still further, the slider includes a first slider and a second slider. The sliding block is respectively provided with an engaging groove and an disengaging groove which are matched with the locking piece, and the disengaging groove is positioned below the engaging groove; when the needle is at the first position, the locking piece is inserted into the engaging groove; when the needle is at the second position, the locking piece is inserted into the exit groove; when the needle is between the first position and the second position, the locking piece is separated from the engaging groove and the disengaging groove.

Preferably, the first fitting groove and the first separating groove are located on the first slider, and the second fitting groove and the second separating groove are located on the second slider.

Preferably, the locking member includes a clutch pin horizontally movably disposed on the needle bar connecting seat, and an elastic member capable of inserting the clutch pin into the clutch groove or the clutch groove is disposed between the needle bar connecting seat and the locking member.

Preferably, the sliding block is provided with a handle pin which is convenient for driving the sliding block to move up and down.

Preferably, the needle bar connecting seat is provided with a sliding groove, and the sliding block is arranged in the sliding groove in a vertically sliding manner; the needle assembly further comprises a cover plate connected to the needle rod connecting seat, the cover plate covers the sliding groove to limit the sliding block in the sliding groove, a through hole for the handle pin to penetrate through is formed in the cover plate, and the through hole is provided with a length direction extending up and down to allow the handle pin to move upwards and slide in the through hole.

Preferably, the needle bar connecting seat has a thread on an upper end thereof for connecting with a needle bar.

The utility model also provides a two-needle sewing machine, including the aircraft nose and set up in needle bar on the aircraft nose, two-needle sewing machine still include as above the eedle subassembly, the eedle unit mount in on the lower tip of needle bar.

The utility model adopts the above scheme, compare prior art and have following advantage:

the utility model discloses in, at least one of them eedle of eedle subassembly can reciprocate and have lower primary importance and higher second place, this eedle can sew the cloth when being in the primary importance, this eedle breaks away from the cloth and stops the sewing when being in the second place, consequently can select two eedle synchronous workings or only single eedle workings according to actual need, especially when making the corner stitch seam, the eedle of inboard suture shifts up and the sewing of suspending, the eedle of only outside suture sews, the outside stitch seam sewing of treating corner portion switches into the state of two eedle synchronous sewing after accomplishing again, the corner stitch seam that the sewing was made does not have unnecessary stitch seam, it is comparatively pleasing to the eye to use nimble and stitch seam.

Drawings

In order to more clearly illustrate the technical solution of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

FIG. 1 is a schematic view showing a structure of a conventional two-needle sewing machine in the prior art;

FIG. 2 is a schematic view of a parallel seam made by a conventional two-needle sewing machine of the prior art;

FIG. 3 is a schematic view of a corner seam with ideal effect;

FIG. 4 is a schematic view of a corner seam made by a conventional two-needle sewing machine of the prior art;

fig. 5 is a schematic structural view of a two-needle sewing machine according to an embodiment of the present invention;

fig. 6 is a schematic structural view of a needle assembly according to an embodiment of the present invention;

FIG. 7 is a left side view of the needle assembly;

FIG. 8 is a schematic structural view of the needle assembly with the cover plate not shown;

FIG. 9 is a schematic view of the connection of the slider and the needle;

FIG. 10 is a left perspective view of the first slider and the first needle;

FIG. 11 is a partial view of the needle assembly;

FIG. 12 is an exploded view of the clutch pin;

FIG. 13 is a schematic structural view of the needle assembly in a first operating condition with the cover plate not shown;

FIG. 14 is a schematic structural view of the needle assembly in a second operating condition with the cover plate not shown;

fig. 15 is a schematic structural view of a two-needle sewing machine according to an embodiment of the present invention, wherein the needle assembly is in a second operating state;

FIG. 16 is a schematic structural view of the slider and the clutch pin in a second operating condition;

FIG. 17 is a fragmentary view of the needle assembly in a second operative condition;

FIG. 18 is a schematic view of the engagement of the clutch pin with the clutch slot;

FIG. 19 is a schematic view of the clutch pin disengaged from both the engagement and disengagement slots;

FIG. 20 is a schematic view of the engagement of the clutch pin with the clutch slot;

fig. 21 is a schematic view of a corner stitch seam sewn by a two-needle sewing machine according to an embodiment of the present invention.

Wherein,

1. a needle bar; 101. a needle bar connecting seat; 2. a chuck; 3. a needle; 31. a first needle; 32. a second needle; 31', a left needle; 32', a right needle; 4. a screw; 5. a needle assembly; 51. an external component thread; 6. a cover plate; 62. a through hole; 7. a cover plate screw; 8. a slider; 81. a first slider; 811. a first groove combining; 812. a first off-tank; 82. a second slider; 821. a second groove combining; 822. a second separating groove; 9. a handle pin; 10. a pin screw; 11. a machine head; 12. a chute; 1201. a first chute; 1202. a second chute; 13. a locking member; 131. a first locking member; 132. a second locking member; 1301. a pin body; 1302. a pin head; 1303. a pin; 1304. a locking portion; 1305. an external thread of the clutch pin; 1306. connecting holes; 14. an elastic member; 15. an elastic cover; 16. an elastic cover screw; 17. a clutch device.

Detailed Description

The following detailed description of the preferred embodiments of the invention, taken in conjunction with the accompanying drawings, enables the advantages and features of the invention to be more readily understood by those skilled in the art. The present invention is defined in terms of the conventional viewing angle of the person skilled in the art and for convenience of description, and is not limited to a specific direction.

In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

As used herein, the terms "comprises" and "comprising" are intended to be inclusive and mean that there may be additional steps or elements included in a method or apparatus without limitation to such steps or elements. As used herein, the term "and/or" includes any combination of one or more of the associated listed items.

It should be noted that, unless otherwise specified, when a feature is referred to as being "fixed" or "connected" to another feature, it may be directly fixed or connected to the other feature or indirectly fixed or connected to the other feature.

The present embodiments provide a needle assembly for a two-needle sewing machine. Referring to fig. 5 to 13, the needle assembly 5 includes a needle bar connecting base 101 capable of being connected to the needle bar 1 and two needles 3 provided on the needle bar connecting base 101. Wherein, the upper end of the needle bar connecting seat 101 is provided with an assembly external thread 51 which can be connected with the needle bar 1. The two needles are arranged in parallel, and at least one needle can move up and down relative to the needle rod connecting seat and has a first position and a second position above the first position. The needle assembly 5 has a first working state and a second working state, when the needle assembly 5 is in the first working state, one of the needles is in the first position, and the needle points of the two needles are kept flat; when the needle assembly 5 is in the second operating condition, one of the needles is in its second position and its tip is higher than the tip of the other needle.

In the present embodiment, the needle 3 includes a first needle 31 and a second needle 32. The two needles can respectively move up and down relative to the needle bar connecting seat 101 and respectively have a first position and a second position, and when the needle assembly 5 is in a first working state, the two needles 3 are both in the first positions; when the needle assembly 5 is in the second work condition, the first needle 31 or the second needle 32 is in its first position, the remaining other needle being in its second position.

The needle 3 is provided on the needle bar connecting base 101 movably up and down by a clutch 17. The clutch device 17 comprises a sliding block 8, and the needle 3 is fixed on the sliding block 8 through a needle screw 10. The slider 8 is provided on the needle bar connecting base 101 to be slidable up and down. The clutch device 17 further includes a locking member 13 for locking the slider 8 to the needle bar connecting holder 101 when the needle reaches the first position or the second position, and the locking member 13 includes a first locking member 131 on the left side and a second locking member 132 on the right side. The sliding block comprises a first sliding block 81 and a second sliding block 82, wherein the sliding block is provided with a combining groove and a separating groove which are matched with the locking piece 13, and the separating groove is positioned below the combining groove. The first fitting groove 811 and the first out-fitting groove 812 are located on the first slider 81, and the second fitting groove 821 and the second out-fitting groove 822 are located on the second slider 82. When the first needle 31 is at the first position, the first locking member 131 is inserted into the first fitting groove 811, as shown in fig. 18; when the first needle 31 is at the second position, the first locking member 131 is inserted into the first off-groove 812, as shown in fig. 20; when the first needle 31 is between the first position and the second position, the first locking member 131 is disengaged from the first engaging groove 811 and the first disengaging groove 812, as shown in fig. 19. Similarly, when the second needle 32 is at the first position, the second locking piece 132 is inserted into the second engaging groove 821; when the second needle 32 is at the second position, the second locking member 132 is inserted into the second escape groove 822; when the second needle 32 is located between the first position and the second position, the second locking member 132 is disengaged from the second engaging groove 821 and the second disengaging groove 822.

As shown in fig. 12, the locking member 13, specifically, a pin, includes a pin body 1301, a pin head 1302, a pin 1303, and a locking part 1304. The pin body 1301 has a clutch pin external thread 1305 connected to the pin head. As shown in fig. 11, a connection hole 1306 for inserting the locking portion 13 into the engaging or disengaging groove is further provided in the needle attachment base 101.

As shown in fig. 11, an elastic member 14 capable of inserting the clutch pin 13 into the engaging groove or the disengaging groove is provided between the needle bar connecting holder 101 and the locking member 13. The elastic member 14 is embodied as a spring, and further, a compression spring, and is disposed in an elastic cover 15, and the elastic cover 15 is fixed to a side surface of the needle assembly 5 with an elastic cover screw 16.

The needle bar connecting seat 101 is provided with a sliding slot 12, the sliding block is slidably disposed in the sliding slot 12 up and down, the sliding slot 12 includes a first sliding slot 1201 and a second sliding slot 1202, the first sliding slot 1201 is used for accommodating the first sliding block 81 to freely slide therein, and the second sliding slot 1202 is used for accommodating the second sliding block 82 to freely slide therein. The needle assembly 5 further includes a cover plate 6 connected to the needle bar connecting base 101, and the cover plate 6 is fixed to the needle bar connecting base 101 by a cover plate screw 7 and covers the slide groove 12 to restrain the slider 8 in the slide groove 12. The slider 8 is provided with a handle pin 9 for driving the slider 8 to move up and down, and the handle pin 9 is used for receiving an external force applied by a user to drive the slider 8 to freely slide in the sliding groove 12. The cover plate 6 is provided with a through hole 62 for the handle pin 9 to pass through, and the through hole 62 has a length direction extending up and down and the length of the through hole at least exceeds the motion trail of the handle pin 9 so as to allow the handle pin 9 to slide up and down in the through hole.

The utility model provides a two-needle sewing machine, as shown in fig. 5, including aircraft nose 11 and set up needle bar 1 on aircraft nose 11, two-needle sewing machine still includes needle subassembly 5 as above, and needle subassembly 5 installs on the lower tip of needle bar 1. Specifically, the lower end portion of the needle bar 1 has a mounting hole provided with an internal thread, and the upper end portion of the needle bar connecting holder 101 is inserted into the mounting hole and connected by the thread.

As shown in fig. 15 to 21, when sewing a straight-line stitch, the first needle 31 is in position H, the second needle 32 is in position G, the needle points of the two needles are kept flat, the two needles are in the second position together, the needle assembly 5 is in the first working state, and the two needles sew the fabric along the X direction synchronously;

when the first needle 31 reaches the position L while the second needle 32 reaches the position K, the sewing is suspended;

pulling the first clutch pin 131 towards the left direction, keeping the drawing action on the first clutch pin 131 after the locking piece 13 is separated from the first separation groove 812, pulling the handle pin 9 towards the upper direction to pull the first slider 81 in the through hole to move upwards, and when the connecting hole 1306 is aligned with the first engagement groove 811, releasing the drawing on the first clutch pin 131, inserting the locking piece 13 into the first engagement groove 811 by the right elastic force, wherein at the moment, the first needle 31 is at the first position to be separated from the cloth, the second needle 32 keeps at the second position, and the needle assembly 5 is in the second working state;

single-needle sewing is carried out using the second needle 32 of the two-needle sewing machine, to position I, with the stitch KI, during which the first needle 31 remains in the first position;

rotating the first needle 31 clockwise by 90 degrees by taking the point I as a center to move up to a position K, or keeping the needle stationary, rotating the cloth anticlockwise by 90 degrees to enable the first needle 31 to be opposite to the position K, and performing single-needle sewing on the cloth by using the second needle 32 to form an outer ring stitch IJ, wherein the first needle 31 is kept at the first position;

after the sewing of the corner stitch IJ is finished, the first clutch pin 131 is pulled towards the left direction, after the locking piece 13 is separated from the first engaging groove 811, the drawing action of the first clutch pin 131 is kept, meanwhile, the handle pin 9 is pulled towards the lower direction to pull the first slider 81 in the through hole to move downwards, when the locking piece moves to the connecting hole and the first disengaging groove 812, the drawing of the first clutch pin 131 is released, the locking piece 13 is inserted into the first disengaging groove 812 by the right elastic force, at the moment, the first needle 31 is located at the second position to contact with the cloth, the second needle 32 is kept at the second position, the needle assembly 5 is located at the first working state, and the two needles synchronously continue sewing the cloth along the Y direction.

The needle assembly 5 of the two-needle sewing machine of the embodiment comprises a needle bar connecting seat 101 which can be connected with a needle bar 1 and two needles 3 arranged on the needle bar connecting seat 101, wherein the two needles 3 are both provided with two working positions, the needle assembly 5 is provided with two working states, at least one needle of the needle assembly 5 can move up and down and is provided with a lower first position and a higher second position, the needle can sew a cloth when being positioned at the first position, the needle is separated from the cloth and stops sewing when being positioned at the second position, therefore, the two needles can be synchronously operated or only one needle can be synchronously operated according to actual requirements, particularly, when a corner stitch is sewn, the needle of an inner side stitch moves up to stop sewing, only the needle of an outer side stitch is sewn, and the state is switched to the state of synchronous sewing of the two needles after the outer side stitch of the corner is sewn, the corner stitch sewn by the sewing machine has no redundant stitch, is flexible to use and has more beautiful stitch. The two-needle sewing machine of the embodiment can finish the sewing work by randomly changing the working state of the needle assembly 5, can meet the sewing requirements of different practical conditions, and can be more attractive without redundant stitches when sewing corner stitches.

The above embodiments are only for illustrating the technical concept and features of the present invention, and are preferred embodiments, which are intended to enable persons skilled in the art to understand the contents of the present invention and to implement the present invention, and thus, the protection scope of the present invention cannot be limited thereby. All equivalent changes and modifications made according to the present invention shall be covered by the protection scope of the present invention.

Claims

1. The utility model provides a eedle subassembly of two-needle sewing machine, includes the needle bar connecting seat that can be connected with the needle bar and locates two eedles on the needle bar connecting seat, two the eedle sets up its characterized in that side by side: at least one machine needle can move up and down relative to the needle bar connecting seat and is provided with a first position and a second position which is positioned above the first position;

2. The needle assembly of claim 1, wherein: the two needles can respectively move up and down relative to the needle bar connecting seat and respectively have the first position and the second position, and when the needle assembly is in a first working state, the two needles are both in the first positions; when the needle assembly is in the second working state, one of the needles is in its first position and the other needle is in its second position.

3. The needle assembly of claim 1 or 2, wherein: the needle is arranged on the needle rod connecting seat in a way of moving up and down through a clutch device.

4. The needle assembly of claim 3, wherein: the clutch device comprises a sliding block, the needle is arranged on the sliding block, and the sliding block is arranged on the needle rod connecting seat in a vertically sliding manner; the clutch device also comprises a locking piece used for locking the sliding block on the needle bar connecting seat when the needle reaches the first position or the second position.

5. The needle assembly of claim 4, wherein: the sliding block is provided with an engaging groove and an disengaging groove which are matched with the locking piece, and the disengaging groove is positioned below the engaging groove; when the needle is at the first position, the locking piece is inserted into the engaging groove; when the needle is at the second position, the locking piece is inserted into the exit groove; when the needle is between the first position and the second position, the locking piece is separated from the engaging groove and the disengaging groove.

6. The needle assembly of claim 5, wherein: the locking piece comprises a clutch pin which is horizontally movably arranged on the needle rod connecting seat, and an elastic piece which can enable the clutch pin to be inserted into the clutch groove or the clutch groove is arranged between the needle rod connecting seat and the locking piece.

7. The needle assembly of claim 4, wherein: the slider is provided with a handle pin which is convenient for driving the slider to move up and down.

8. The needle assembly of claim 7, wherein: the needle bar connecting seat is provided with a sliding chute, and the sliding block can be arranged in the sliding chute in a vertically sliding manner; the needle assembly further comprises a cover plate connected to the needle rod connecting seat, the cover plate covers the sliding groove to limit the sliding block in the sliding groove, a through hole for the handle pin to penetrate through is formed in the cover plate, and the through hole is provided with a length direction extending up and down to allow the handle pin to move upwards and slide in the through hole.

9. The needle assembly of claim 1, wherein: the upper end of the needle bar connecting seat is provided with a thread for connecting with a needle bar.

10. The utility model provides a two-needle sewing machine, includes the aircraft nose and set up in needle bar on the aircraft nose, its characterized in that: the two-needle sewing machine further includes a needle assembly as claimed in any one of claims 1 to 9, which is mounted on a lower end portion of the needle bar.