CN217733470U - Thread cutting structure for sewing machine - Google Patents

Abstract

The utility model discloses a thread trimming structure for sewing machine, including base, sewing machine body, take-up subassembly and automatic thread trimming subassembly, the take-up subassembly is located on the base, be equipped with the pillar on the sewing machine body, the sewing machine body is located on the base through the pillar, automatic thread trimming subassembly is located on the pillar, the take-up subassembly includes lead screw, slider, backup pad and take-up lever, be equipped with the cavity on the base, the cavity passes through spout and external intercommunication, the lead screw is rotatory to be located in the cavity, the slider slides to cup joint and locates on the lead screw and slide and locate in the spout, the lead screw passes through the thread engagement with the slider, the backup pad is located on the slider, the take-up lever is located in the backup pad. The utility model relates to a sewing machine technical field specifically is to provide a be convenient for realize automatic trimming, can effectively prevent to take off the line fly line, the higher trimming structure for sewing machine of practicality.

Description

Thread cutting structure for sewing machine

Technical Field

The utility model relates to a sewing machine technical field specifically indicates a thread trimming structure for sewing machine.

Background

The sewing machine is a machine which uses one or more sewing threads to form one or more stitches on a sewing material to enable one or more layers of the sewing material to be interwoven or sewn, the sewing machine can sew fabrics such as cotton, hemp, silk, wool, artificial fiber and the like, and products such as leather, plastic, paper and the like, the sewn stitches are neat, beautiful, flat and firm, the sewing speed is high, the use is simple and convenient, and artistic forms such as hand-push embroidery computer embroidery and the like are derived. The existing sewing machine needs to manually cut off the thread body after finishing sewing work, the operation is relatively troublesome, in order to solve the problem, the sewing machine with the automatic thread cutting function appears on the market, but the sewing machine has a problem: the position that the line body was tailor automatically is nearer apart from the pinhole, and the end of a thread is short, leads to the off-line to fly the line easily, and after the off-line flies the line, just need staff's threading again, brings a lot of inconveniences for the staff.

SUMMERY OF THE UTILITY MODEL

To the above situation, for overcoming prior art's defect, the utility model provides a be convenient for realize automatic trimming, can effectively prevent to take off the line fly line, the higher trimming structure for sewing machine of practicality.

The utility model adopts the following technical scheme: the utility model discloses a thread trimming structure for sewing machine, including base, sewing machine body, take-up subassembly and automatic thread trimming subassembly, the take-up subassembly is located on the base, be equipped with the pillar on the sewing machine body, the sewing machine body is located on the base through the pillar, automatic thread trimming subassembly is located on the pillar, the take-up subassembly includes lead screw, slider, backup pad and take-up lever, be equipped with the cavity on the base, the cavity passes through spout and external intercommunication, the lead screw is rotatory to be located in the cavity, the slider slides to cup joint and locates on the lead screw and slide and locate in the spout, the lead screw passes through threaded engagement with the slider, the backup pad is located on the slider, the take-up lever is located in the backup pad.

Further, automatic trimming subassembly includes cam, guide bar, spring, lifter plate, first sword and the second sword of tailorring, be equipped with installation cavity and recess in the pillar, installation cavity and recess pass through the opening intercommunication, the installation cavity is located to the guide bar, the lifter plate slides and cup joints on locating the guide bar, first sword of tailorring is located on the lifter plate, first sword of tailorring can slide and run through in the opening extends to the recess, the spring housing connects and locates on the guide bar, lifter plate and cavity inner wall are located respectively to the both ends of spring, the installation cavity is located in the cam rotation, the cam is connected with the lifter plate contact, and the second sword of tailorring of institute is located in the recess, first sword of tailorring cooperatees with the second sword.

Furthermore, a first motor is arranged in the cavity, and one end of the screw rod is arranged on an output shaft of the first motor.

Furthermore, a second motor is arranged in the mounting cavity, and the cam is arranged on an output shaft of the second motor.

Furthermore, a contact switch is arranged in the groove, the contact switch is in contact connection with the take-up lever, and the first motor and the second motor are both electrically connected with the contact switch.

Adopt above-mentioned structure the utility model discloses the beneficial effect who gains as follows: the thread take-up assembly is arranged, so that the thread body can be conveniently elongated through the thread take-up assembly, the sufficient cutting length of the thread body can be reserved, and the phenomenon that after thread cutting, the thread cutting position of the thread body is too close to a needle hole, and the thread end is too short, so that thread falling and thread flying are caused is avoided; this scheme is equipped with automatic trimming subassembly, is convenient for voluntarily to tailor by the line body of being elongated through automatic trimming subassembly.

Drawings

The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention. In the drawings:

FIG. 1 is a schematic view of the overall structure of the present embodiment;

fig. 2 is an enlarged view of a portion a in fig. 1.

The automatic thread cutting machine comprises a base 1, a base 2, a sewing machine body 3, a thread take-up assembly 4, an automatic thread cutting assembly 5, a support column 6, a screw rod 7, a sliding block 8, a supporting plate 9, a thread take-up rod 10, a cam 11, a guide rod 12, a spring 13, a lifting plate 14, a first cutting knife 15, a second cutting knife 16, a first motor 17, a second motor 18 and a contact switch.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments; based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", 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 simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

As shown in fig. 1-2, the utility model discloses a thread trimming structure for sewing machine, including base 1, sewing machine body 2, take-up component 3 and automatic thread trimming subassembly 4, take-up component 3 locates on base 1, be equipped with pillar 5 on sewing machine body 2, sewing machine body 2 locates on base 1 through pillar 5, automatic thread trimming subassembly 4 locates on pillar 5, take-up component 3 includes lead screw 6, slider 7, backup pad 8 and take-up lever 9, be equipped with the cavity on base 1, the cavity communicates with the external world through the spout, lead screw 6 is rotatory to be located in the cavity, slider 7 slides to cup joint and locates on lead screw 6 and slides to locate in the spout, lead screw 6 and slider 7 pass through the threaded engagement, backup pad 8 locates on slider 7, take-up lever 9 locates on backup pad 8; the automatic thread trimming assembly 4 comprises a cam 10, a guide rod 11, a spring 12, a lifting plate 13, a first trimming knife 14 and a second trimming knife 15, a mounting cavity and a groove are arranged in the strut 5, the mounting cavity and the groove are communicated through an opening, the guide rod 11 is arranged in the mounting cavity, the lifting plate 13 is slidably sleeved on the guide rod 11, the first trimming knife 14 is arranged on the lifting plate 13, the first trimming knife 14 can slidably penetrate through the opening and extend into the groove, the spring 12 is sleeved on the guide rod 11, two ends of the spring 12 are respectively arranged on the lifting plate 13 and the inner wall of the cavity, the cam 10 is rotatably arranged in the mounting cavity, the cam 10 is in contact connection with the lifting plate 13, the second trimming knife 15 is arranged in the groove, and the first trimming knife 14 is matched with the second trimming knife 15; a second motor 17 is arranged in the mounting cavity, and the cam 10 is arranged on an output shaft of the second motor 17; a contact switch 18 is arranged in the groove, the contact switch 18 is in contact connection with the thread take-up lever 9, and the first motor 16 and the second motor 17 are both electrically connected with the contact switch 18.

As shown in fig. 1, a first motor 16 is disposed in the cavity, and one end of the lead screw 6 is disposed on an output shaft of the first motor 16.

When the automatic thread trimming device is used specifically, during thread trimming, a presser foot on a sewing machine body 2 is pressed on cloth, a needle body on the sewing machine body 2 is lifted, at the moment, a first motor 16 is started to drive a screw rod 6 to rotate, the screw rod 6 drives a slider 7 to move rightwards, the slider 7 drives a supporting plate 8 to move rightwards, the supporting plate 8 drives a thread take-up lever 9 to move rightwards, when the thread take-up lever 9 moves between the presser foot and the needle body, the thread body can be dragged to be elongated, so that enough trimming length can be reserved, the situation that the position where the thread body is trimmed is too close to a needle hole after thread trimming is avoided, the thread end is too short, thread falling and flying can be caused, when the thread take-up lever 9 drags the thread body to pass between an automatic thread trimming component 4 and a support post 5 and contact with a contact switch 18, the first motor 16 is closed, a second motor 17 is started, a cam 10 is driven to rotate by a second motor 17, the cam 10 drives a lifting plate 13 to move downwards, the lifting plate 13 drives a first trimming knife 14 to move downwards to be close to a second trimming knife 15, and the thread body of the second trimming knife 15 can be achieved.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

The basic principles and the main features of the invention and the advantages of the invention have been shown and described above, it will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, but that the invention may be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims (5)

1. A trimming structure for sewing machine which characterized in that: including base (1), sewing machine body (2), take-up subassembly (3) and automatic thread trimming subassembly (4), take-up subassembly (3) is located on base (1), be equipped with pillar (5) on sewing machine body (2), sewing machine body (2) are located on base (1) through pillar (5), automatic thread trimming subassembly (4) are located on pillar (5), take-up subassembly (3) are including lead screw (6), slider (7), backup pad (8) and take-up lever (9), be equipped with the cavity on base (1), the cavity passes through spout and external intercommunication, the cavity is located in lead screw (6) rotation, slider (7) slip cup joint locate on lead screw (6) and slide and locate in the spout, lead screw (6) pass through threaded engagement with slider (7), backup pad (8) are located on slider (7), take-up lever (9) are located on backup pad (8).

2. The thread trimming structure for a sewing machine according to claim 1, wherein: automatic trimming subassembly (4) includes cam (10), guide bar (11), spring (12), lifter plate (13), first sword (14) and the second of tailorring is tailor sword (15), be equipped with installation cavity and recess in pillar (5), installation cavity and recess pass through the opening intercommunication, the installation cavity is located in guide bar (11), lifter plate (13) slip cup joints and locates on guide bar (11), first sword (14) of tailorring is located on lifter plate (13), first sword (14) of tailorring can slide and run through the opening and extend to in the recess, spring (12) cup joint is located on guide bar (11), lifter plate (13) and cavity inner wall are located respectively to the both ends of spring (12), the installation cavity is located in the rotation of cam (10), cam (10) are connected with lifter plate (13) contact, and the second of writing is tailor sword (15) and is located in the recess, first sword (14) of tailorring cooperatees with second sword (15).

3. The thread trimming structure for a sewing machine according to claim 2, wherein: a first motor (16) is arranged in the cavity, and one end of the screw rod (6) is arranged on an output shaft of the first motor (16).

4. The thread trimming structure for a sewing machine according to claim 3, wherein: and a second motor (17) is arranged in the mounting cavity, and the cam (10) is arranged on an output shaft of the second motor (17).

5. The thread trimming structure for a sewing machine according to claim 4, wherein: a contact switch (18) is arranged in the groove, the contact switch (18) is in contact connection with the take-up lever (9), and the first motor (16) and the second motor (17) are both electrically connected with the contact switch (18).

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