Convenient-to-use automatic thread trimming mechanism for sewing machine

Abstract

The utility model relates to the technical field of sewing machines, in particular to a convenient-to-use automatic thread trimming mechanism for a sewing machine, which comprises a mounting box, a movable groove is arranged on one side of the mounting box, and a first swing arm and a second swing arm are respectively arranged at the upper end and the lower end inside the movable groove. A first tool bit and a second tool bit are arranged at the ends, located outside the movable groove, of the first swing arm and the second swing arm correspondingly. The push rod motor, the movable part, the first connecting rod, the second connecting rod, the third connecting rod and the rotating rod are used in cooperation, the first connecting rod is pushed forwards through the movable part after the push rod motor is started, the other end of the first connecting rod tilts when one end of the first connecting rod is pushed, and the second connecting rod and the third connecting rod are jacked simultaneously after the other end of the first connecting rod tilts. The second connecting rod and the third connecting rod drive the first tool bit and the second tool bit through the first swing arm and the second swing arm to rapidly cut off the suture line, in this way, it is not needed to manually take scissors to cut off the suture line every time, and therefore the production efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of sewing machines, in particular to an automatic thread trimming mechanism for sewing machines which is convenient to use. Background Art

[0002] A sewing machine is a mechanical device used to sew or mend fabrics. It is widely used in the fields of textiles, clothing manufacturing, and home sewing. It passes thread through the fabric to form seams and fix two or more pieces of fabric together.

[0003] After sewing gloves, the existing sewing machines on the market generally need to manually cut the stitching threads with scissors. In this way, when processing in batches, manually cutting the stitching threads one by one will delay a lot of processing time, thereby affecting the overall production efficiency. For this reason, we propose an automatic thread cutting mechanism for sewing machines that is easy to use. Utility Model Content

[0004] The purpose of the utility model is to provide a convenient automatic thread trimming mechanism for a sewing machine to solve the problems raised in the above-mentioned background technology.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A convenient automatic thread trimming mechanism for a sewing machine, comprising

[0007] An installation box, wherein a movable groove is provided on one side of the installation box, a first swing arm and a second swing arm are respectively provided at the upper end and the lower end of the movable groove, and a first blade head and a second blade head are respectively provided at one end of the first swing arm and the second swing arm located outside the movable groove;

[0008] The other ends of the first swing arm and the second swing arm are respectively provided with a second connecting rod and a third connecting rod, one side of the second connecting rod and the third connecting rod is provided with a cutting mechanism, and the cutting mechanism includes a push rod motor, a movable part and a first connecting rod.

[0009] Preferably, a push rod motor is movably mounted at one end of the mounting box away from the movable groove, a movable member is movably mounted on the output shaft end of the push rod motor via a rotating shaft, a bottom end of the movable member is movably connected to a first connecting rod via a rotating shaft, and a middle portion and an end portion of the other end of the first connecting rod are movably connected to a second connecting rod and a third connecting rod via a rotating shaft respectively;

[0010] Preferably, the end of the first swing arm away from the first cutter head and the middle of the second swing arm away from the second cutter head are movably connected via a rotating rod;

[0011] Preferably, a slot is provided on the side of the first swing arm and the second swing arm away from the installation box, and a plug plate is provided on the side of the first blade head and the second blade head close to the slot, and the slot and the plug plate are movably connected by bolts;

[0012] Preferably, the lower surface of the bottom end of the first blade head is horizontal, the upper surface of the top end of the second blade head is horizontal, and the first blade head and the second blade head are slidably connected on the same side surface;

[0013] Preferably, the cutting edge of the first cutting head is in opposite directions to the cutting edge of the second cutting head.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] 1. A convenient-to-use automatic thread trimming mechanism for a sewing machine is used in cooperation with a push rod motor, a movable part, a first connecting rod, a second connecting rod, a third connecting rod and a rotating rod. After the push rod motor is started, the first connecting rod is pushed forward by the movable part. When one end of the first connecting rod is pushed, the other end rises. When the other end of the first connecting rod rises, the second connecting rod and the third connecting rod are lifted at the same time. The second connecting rod and the third connecting rod drive the first cutting head and the second cutting head through the first swing arm and the second swing arm to quickly cut the suture thread. In this way, there is no need to manually take scissors to cut it every time, thereby improving production efficiency.

[0016] 2. A convenient-to-use automatic thread trimming mechanism for a sewing machine is used in cooperation with a first swing arm, a second swing arm, a first cutter head, a second cutter head, a slot, an insert plate and a bolt. When the first cutter head and the second cutter head need to be replaced, the first cutter head and the second cutter head are adjusted to an open state, and then the bolts on the first swing arm and the second swing arm are removed in turn using tools. After the bolts on the first swing arm and the second swing arm are removed, the insert plate at one end of the first cutter head and the second cutter head can be pulled out of the slot, and then the new first cutter head and the second cutter head can be replaced. The scissors are set to a detachable structure, which is convenient for replacement from the outside of the installation box at a later time, and there is no need to remove the installation box as a whole, thereby achieving the purpose of easy and quick replacement. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall main structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the first connecting rod structure of the utility model;

[0019] Figure 3 This is a schematic diagram of the plugboard installation structure of the utility model;

[0020] Figure 4 For this utility model Figure 2 A magnified schematic diagram of center A.

[0021] In the figure: 1, installation box; 2, movable slot; 3, first swing arm; 4, second swing arm; 5, first cutter head; 6, second cutter head; 7, second connecting rod; 8, third connecting rod; 9, cutting mechanism; 901, push rod motor; 902, movable part; 903, first connecting rod; 10, rotating rod; 11, slot; 12, plug plate; 13, bolt. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "several" is two or more, unless otherwise clearly and specifically defined.

[0024] like Figure 1-4 As shown, a technical solution provided by the utility model:

[0025] A convenient automatic thread trimming mechanism for a sewing machine includes a mounting box 1, a movable groove 2 is provided on one side of the mounting box 1, a first swing arm 3 and a second swing arm 4 are provided at the upper and lower ends of the movable groove 2, respectively, a first cutter head 5 and a second cutter head 6 are provided at the outer ends of the first swing arm 3 and the second swing arm 4 located at the movable groove 2; a second connecting rod 7 and a third connecting rod 8 are provided at the other ends of the first swing arm 3 and the second swing arm 4, respectively, a cutting mechanism 9 is provided on one side of the second connecting rod 7 and the third connecting rod 8, and the cutting mechanism 9 includes a push rod Motor 901, movable part 902 and first connecting rod 903; a slot 11 is provided on the side of the first swing arm 3 and the second swing arm 4 away from the installation box 1, and a plug plate 12 is provided on the side of the first cutter head 5 and the second cutter head 6 close to the slot 11, and the slot 11 and the plug plate 12 are movably connected by a bolt 13; the lower surface of the bottom end of the first cutter head 5 is horizontal, the upper surface of the top end of the second cutter head 6 is horizontal, and the first cutter head 5 and the second cutter head 6 are slidably connected on the same side surface; the cutting edge of the first cutter head 5 is opposite to the cutting edge of the second cutter head 6;

[0026] In this embodiment, when the first blade head 5 and the second blade head 6 need to be replaced, the first blade head 5 and the second blade head 6 are adjusted to an open state, and then the bolts 13 on the first swing arm 3 and the second swing arm 4 are removed in turn using tools. After the bolts 13 on the first swing arm 3 and the second swing arm 4 are removed, the plug plate 12 at one end of the first blade head 5 and the second blade head 6 can be pulled out from the slot 11, and then the new first blade head 5 and the second blade head 6 are replaced, and the plug plate 12 at one end of the new first blade head 5 and the second blade head 6 is inserted into the slot 11 at the corresponding position, and then fixed with the bolt 13. The scissors are set to a detachable structure, which is convenient for later replacement from the outside of the installation box 1, and there is no need to remove the installation box 1 as a whole, thereby achieving the purpose of easy and quick replacement.

[0027] like Figure 2 and Figure 4 As shown, a push rod motor 901 is movably installed at one end of the installation box 1 away from the movable groove 2, and a movable part 902 is movably installed at the output shaft end of the push rod motor 901 through a rotating shaft, and the bottom end of the movable part 902 is movably connected to a first connecting rod 903 through a rotating shaft, and the middle part and the end of the other end of the first connecting rod 903 are movably connected to a second connecting rod 7 and a third connecting rod 8 through a rotating shaft respectively; the end of the first swing arm 3 away from the first cutter head 5 and the middle part of the second swing arm 4 away from the second cutter head 6 are movably connected through a rotating rod 10;

[0028] In this embodiment, when cutting, the push rod motor 901 is controlled to start automatically. After the push rod motor 901 is started, the first connecting rod 903 is pushed forward through the movable part 902. When one end of the first connecting rod 903 is pushed, the other end is tilted. When the other end of the first connecting rod 903 is tilted, the second connecting rod 7 and the third connecting rod 8 are lifted at the same time. The second connecting rod 7 and the third connecting rod 8 drive the first cutting head 5 and the second cutting head 6 through the first swing arm 3 and the second swing arm 4 to quickly cut the suture line. In this way, there is no need to manually take the scissors to cut it every time, thereby improving production efficiency.

[0029] Working principle: When cutting, the push rod motor 901 is controlled to start automatically. After the push rod motor 901 is started, the first connecting rod 903 is pushed forward through the movable part 902. When one end of the first connecting rod 903 is pushed, the other end rises. When the other end of the first connecting rod 903 rises, the second connecting rod 7 and the third connecting rod 8 are lifted at the same time. The second connecting rod 7 and the third connecting rod 8 drive the first cutting head 5 and the second cutting head 6 to quickly cut the suture thread through the first swing arm 3 and the second swing arm 4. When the first cutting head 5 and the second cutting head 6 need to be replaced, Adjust the first cutter head 5 and the second cutter head 6 to the open state, and then use tools to remove the bolts 13 on the first swing arm 3 and the second swing arm 4 in turn. After the bolts 13 on the first swing arm 3 and the second swing arm 4 are removed, the plug plate 12 at one end of the first cutter head 5 and the second cutter head 6 can be pulled out from the slot 11, and then replace the new first cutter head 5 and the second cutter head 6, insert the plug plate 12 at one end of the new first cutter head 5 and the second cutter head 6 into the slot 11 at the corresponding position, and then fix it with the bolt 13.

[0030] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the utility model and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A convenient automatic thread trimming mechanism for a sewing machine, characterized in that: include An installation box (1), wherein a movable groove (2) is provided on one side of the installation box (1), a first swing arm (3) and a second swing arm (4) are respectively provided at the upper end and the lower end of the movable groove (2), and a first blade head (5) and a second blade head (6) are respectively provided at the outer end of the first swing arm (3) and the second swing arm (4) located in the movable groove (2); A second connecting rod (7) and a third connecting rod (8) are respectively provided at the other ends of the first swing arm (3) and the second swing arm (4); a cutting mechanism (9) is provided on one side of the second connecting rod (7) and the third connecting rod (8); the cutting mechanism (9) comprises a push rod motor (901), a movable part (902) and a first connecting rod (903).

2. The convenient-to-use automatic thread trimming mechanism for a sewing machine according to claim 1, characterized in that: A push rod motor (901) is movably mounted on one end of the installation box (1) away from the movable groove (2); a movable part (902) is movably mounted on the output shaft end of the push rod motor (901) via a rotating shaft; the bottom end of the movable part (902) is movably connected to a first connecting rod (903) via a rotating shaft; the middle part and the end of the other end of the first connecting rod (903) are movably connected to a second connecting rod (7) and a third connecting rod (8) respectively via a rotating shaft.

3. The convenient-to-use automatic thread trimming mechanism for a sewing machine according to claim 1, characterized in that: The end of the first swing arm (3) away from the first cutter head (5) is movably connected to the middle of the second swing arm (4) away from the second cutter head (6) via a rotating rod (10).

4. The convenient-to-use automatic thread trimming mechanism for a sewing machine according to claim 1, characterized in that: A slot (11) is provided on the side of the first swing arm (3) and the second swing arm (4) away from the installation box (1), and an inserting plate (12) is provided on the side of the first blade head (5) and the second blade head (6) close to the slot (11), and the slot (11) and the inserting plate (12) are movably connected via a bolt (13).

5. The convenient-to-use automatic thread trimming mechanism for a sewing machine according to claim 1, characterized in that: The lower surface of the bottom end of the first blade head (5) is horizontal, the upper surface of the top end of the second blade head (6) is horizontal, and the first blade head (5) and the second blade head (6) are slidably connected on the same side surface.

6. The convenient-to-use automatic thread trimming mechanism for a sewing machine according to claim 1, characterized in that: The cutting edge of the first cutting head (5) is in the opposite direction to the cutting edge of the second cutting head (6).

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