CN219315242U - Thread loosening device of sewing machine - Google Patents

Abstract

The utility model relates to a thread loosening device of a sewing machine, which comprises a mounting shaft, an upper elastic plate, a lower elastic plate and an electromagnetic elastic mechanism for driving the upper elastic plate to move up and down, wherein a thread passing groove is formed in the lower elastic plate, a buffering elastic assembly is arranged on the upper elastic plate above the thread passing groove and comprises a telescopic column and a buffering spring, the telescopic column is connected in a telescopic hole in the upper elastic plate in a telescopic manner, one end of the buffering spring is connected with a telescopic Kong Dingbi, the other end of the buffering spring is connected with the telescopic column, and a thread pressing head matched with the thread passing groove is arranged at the lower end of the telescopic column. According to the utility model, the wire passing groove is formed in the lower elastic plate, and the buffer elastic assembly is arranged on the upper elastic plate above the wire passing groove, so that the wire passing groove can well limit the wire in the wire passing groove to prevent the wire from sliding out, in addition, the buffer elastic assembly is arranged, so that the elastic buffer adjustment can be carried out on the wire, the situation of too loose or too tight wire pressing is not easy to occur, and the equipment performance is improved.

Description

Thread loosening device of sewing machine

Technical Field

The utility model relates to the technical field of sewing machines, in particular to a thread loosening device of a sewing machine.

Background

The thread loosening device is a common accessory of a sewing machine and is mainly used for loosening and adjusting threads. The existing thread loosening device directly compresses the thread through two pressing plates, such as the thread loosening device disclosed in the application number 201921002803.5 and the sewing machine with the thread loosening device. This kind of pine line device presss from both sides line piece through two flat clamp line pieces and presss from both sides line piece's both sides tight, in-service use's in-process, and the line is easy to follow clamp line piece's both sides roll-off, moreover, relies on compression spring's the packing completely, does not have buffering adaptation function, can not adjust by oneself according to the line of different thickness, appears too loose or the condition of too tight easily.

Disclosure of Invention

Aiming at the defects in the background technology, the utility model provides a thread loosening device of a sewing machine.

The technical scheme adopted by the utility model is as follows: the utility model provides a sewing machine's pine line device, includes the installation axle, goes up the elastic lamina, down the elastic lamina and is used for driving the electromagnetic elasticity mechanism of going up the elastic lamina up-and-down action, be equipped with the wire casing down on the elastic lamina, be located be equipped with the buffering elasticity subassembly on the last elastic lamina of wire casing top, the buffering elasticity subassembly includes flexible post and buffering spring, flexible connection of flexible post is in the flexible hole on last elastic lamina, buffering spring one end is connected with flexible Kong Dingbi, and the other end is connected with flexible post, the lower extreme of flexible post is equipped with the line ball head with wire casing looks adaptation.

Further, the upper end of the telescopic column is provided with an upper limit step, and a lower limit step is arranged below the telescopic hole.

Further, the upper elastic plate and the lower elastic plate are sleeved on the mounting shaft, a connecting plate is arranged in a shaft hole in the middle of the upper elastic plate, and a movable groove for the connecting plate to move up and down is arranged on the mounting shaft.

Further, the electromagnetic loosening and tightening mechanism comprises an electromagnetic block and a thimble arranged in the electromagnetic block, and the thimble can push the upper loosening and tightening plate to complete the loosening action under the magnetic force action of the electromagnetic block.

Further, an operating rod extending downwards to the outside of the electromagnetic block is arranged at the bottom of the thimble.

Further, the top of the installation shaft is provided with a threaded rod, the threaded rod is connected with an elastic adjusting button in a threaded manner, and an elastic spring is sleeved between the elastic adjusting button and the upper elastic plate.

Furthermore, a limiting ring is arranged on the mounting shaft.

The beneficial effects of the utility model are as follows: according to the utility model, the wire passing groove is formed in the lower elastic plate, and the buffer elastic assembly is arranged on the upper elastic plate above the wire passing groove, so that the wire passing groove can well limit the wire in the wire passing groove to prevent the wire from sliding out, in addition, the buffer elastic assembly is arranged, so that the elastic buffer adjustment can be carried out on the wire, the situation of too loose or too tight wire pressing is not easy to occur, and the equipment performance is improved.

In addition to the objects, features and advantages described above, the present utility model has other objects, features and advantages.

The utility model will be described in further detail with reference to the accompanying drawings.

Drawings

Fig. 1 is a schematic structural view of the present utility model.

Fig. 2 is an enlarged schematic view at a in fig. 1.

Fig. 3 is a schematic view of an upper stripper plate.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that, if directional indications (such as up, down, left, right, front, and rear … …) are included in the embodiments of the present utility model, the directional indications are merely used to explain the relative positional relationship, movement conditions, etc. between the components in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are correspondingly changed.

The utility model provides a thread loosening device of a sewing machine.

In this embodiment, referring to fig. 1-3, this sewing machine's thread loosening device, including installation axle 1, go up the elastic lamina 2, lower elastic lamina 3 and be used for driving the electromagnetic elasticity mechanism of going up the elastic lamina up-and-down action, be equipped with on the elastic lamina down and cross wire casing 4, be located be equipped with on the elastic lamina of crossing the wire casing top and cushion the elastic component, cushion the elastic component and include telescopic column 5 and buffer spring 6, telescopic column telescopic connection is in last telescopic hole 7 on the elastic lamina, buffer spring one end is connected with flexible Kong Dingbi, and the other end is connected with the telescopic column, the lower extreme of telescopic column is equipped with the line ball head 8 with crossing wire casing looks adaptation.

In the above technical scheme, through setting up the wire casing on the elastic board down, set up the buffering elasticity subassembly on the last elastic board of wire casing top simultaneously, the wire casing of crossing can be with the fine restriction of line in crossing the wire casing, prevents that the line roll-off, in addition, through setting up the buffering elasticity subassembly, can carry out elastic buffer adjustment to the line ball, the difficult too loose or too tight condition of line ball that appears improves equipment performance.

The buffer tightness assembly comprises a telescopic column and a buffer spring, the line pressing head on the telescopic column is pressed in the line passing groove under the action of the buffer spring, so that when the line is too thick, the telescopic column moves upwards naturally, line pressing is avoided, when the line is too thin, the telescopic column is pressed downwards naturally, the pressing force is guaranteed, and the effect of self-adjusting is achieved in a certain range.

Specifically, the upper end of the telescopic column is provided with an upper limit step 9, and a lower limit step 10 is arranged below the telescopic hole.

In the technical scheme, the telescopic column is prevented from sliding out of the telescopic hole by arranging the upper limit step and the lower limit step.

Specifically, the upper elastic plate and the lower elastic plate are sleeved on a mounting shaft, wherein a connecting plate 12 is arranged in a shaft hole 11 in the middle of the upper elastic plate, and a movable groove 13 for the connecting plate 12 to move up and down is arranged on the mounting shaft; the electromagnetic loosening and tightening mechanism comprises an electromagnetic block 14 and a thimble 15 arranged in the electromagnetic block, and the thimble can push the upper loosening and tightening plate to complete the loosening action under the magnetic force of the electromagnetic block.

According to the technical scheme, under the condition that the electromagnetic block is electrified, the ejector pin is pushed to one side of the elastic plate upwards under the magnetic force action of the electromagnetic block, so that the elastic plate moves upwards, and the thread loosening action is completed.

Specifically, the bottom of the thimble is provided with an operating rod 16 which extends downwards to the outside of the electromagnetic block.

In the case of power failure, the wire loosening operation can be performed by the operation lever.

Specifically, the top of the mounting shaft is provided with a threaded rod 17, the threaded rod is connected with a tightness adjusting button 18 in a threaded manner, and a tightness spring 19 is sleeved between the tightness adjusting button and the upper tightness plate; the mounting shaft is provided with a stop collar 20.

According to the technical scheme, the tension line tightness can be adjusted by rotating the tightness adjusting button, the limiting ring plays a limiting role, and the overtravel action of the tightness adjusting button is avoided.

The skilled person will know: while the utility model has been described in terms of the foregoing embodiments, the inventive concepts are not limited to the utility model, and any modifications that use the inventive concepts are intended to be within the scope of the appended claims.

Claims (7)

1. The utility model provides a sewing machine's pine line device, includes installation axle, goes up the elastic board, down the elastic board and is used for driving the electromagnetic elasticity mechanism of elastic board up-and-down action, its characterized in that: the upper elastic plate is provided with a buffer elastic component, the buffer elastic component comprises a telescopic column and a buffer spring, the telescopic column is connected in a telescopic hole in the upper elastic plate in a telescopic manner, one end of the buffer spring is connected with a telescopic Kong Dingbi, the other end of the buffer spring is connected with the telescopic column, and the lower end of the telescopic column is provided with a line pressing head matched with the line passing groove.

2. The thread releasing device of a sewing machine of claim 1, wherein: the upper end of the telescopic column is provided with an upper limit step, and a lower limit step is arranged below the telescopic hole.

3. The thread releasing device of a sewing machine of claim 1, wherein: the upper elastic plate and the lower elastic plate are sleeved on the mounting shaft, a connecting plate is arranged in a shaft hole in the middle of the upper elastic plate, and a movable groove for the connecting plate to move up and down is arranged on the mounting shaft.

4. The thread releasing device of a sewing machine of claim 2, wherein: the electromagnetic loosening and tightening mechanism comprises an electromagnetic block and a thimble arranged in the electromagnetic block, and the thimble can push the upper loosening plate to complete the loosening action under the magnetic force action of the electromagnetic block.

5. The thread releasing device of a sewing machine of claim 4, wherein: the bottom of the thimble is provided with an operating rod which extends downwards to the outside of the electromagnetic block.

6. The thread releasing device of a sewing machine of claim 1, wherein: the top of the installation shaft is provided with a threaded rod, the threaded rod is connected with an elastic adjusting button in a threaded manner, and an elastic spring is sleeved between the elastic adjusting button and the upper elastic plate.

7. The thread releasing device of a sewing machine of claim 6, wherein: and a limiting ring is arranged on the mounting shaft.

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