阅读说明：本技术 一种家用缝针自动穿线装置 (Automatic threading device of domestic seam needle ) 是由 陈伟宗 于 2020-11-30 设计创作，主要内容包括：本发明公开了一种家用缝针自动穿线装置,包括底座,所述底座内左右贯通的设有滑腔,所述滑腔上壁相连通的设有上腔,所述滑腔前后壁之间左右滑动设有滑座,所述滑座内设有开口向上的中腔,所述中腔后壁上相连通的设有后槽；本发明能够自动为家用缝针进行穿针引线的操作,减少人为操作,避免被缝针扎伤,将缝针插入针槽内,通过转动缝针使针眼对准穿针器,随后将纺织线拉直正对针眼,然后通过水平移动穿针器穿过针眼后钩住纺织线,并带动纺织线穿过针眼以完成穿针引线操作,随后可将穿好线的缝针取下使用,方便快捷。(The invention discloses a household automatic threading device for a sewing needle, which comprises a base, wherein a sliding cavity is arranged in the base in a left-right through manner, the upper wall of the sliding cavity is provided with an upper cavity in a communicated manner, a sliding seat is arranged between the front wall and the rear wall of the sliding cavity in a left-right sliding manner, a middle cavity with an upward opening is arranged in the sliding seat, and the rear wall of the middle cavity is provided with a rear groove in a communicated manner; the invention can automatically carry out the operation of threading the needle and the lead for the household sewing needle, reduces the manual operation, avoids the injury of the sewing needle, inserts the sewing needle into the needle groove, leads the needle eye to be aligned with the needle threading device by rotating the sewing needle, then straightens the textile thread to be opposite to the needle eye, then hooks the textile thread after passing through the needle eye by horizontally moving the needle threading device, drives the textile thread to pass through the needle eye to complete the operation of threading the needle and the lead, and then can take down the sewing needle with the thread for use, thereby being convenient and fast.)

1. The utility model provides an automatic threading device of domestic seam needle, includes the base, its characterized in that: the base is internally provided with a sliding cavity which is communicated with the left and right, the upper wall of the sliding cavity is provided with an upper cavity which is communicated with the left and right, a sliding seat is arranged between the front wall and the rear wall of the sliding cavity in a left-right sliding manner, a middle cavity with an upward opening is arranged in the sliding seat, a rear groove is arranged on the rear wall of the middle cavity in a communicated manner, a left chain shaft is arranged between the rear wall of the rear groove and the front wall of the middle cavity in a rotating and left-right sliding manner, a mandril is fixedly connected to the right wall of the rear groove, the left end of the mandril is rotatably connected to the right end of the left chain shaft, a right chain shaft is arranged between the front wall and the rear wall of the middle cavity in a rotating and left-right sliding manner, the left chain shaft and the right chain shaft are respectively and fixedly connected with chain wheels, a chain is tensioned between the two chain wheels, the left chain shaft and the right chain shaft are rotatably connected with, the middle driven shaft is fixedly connected with a chain driving wheel, the lower end of the chain driving wheel is meshed with the upper end of the chain, the right end of the middle cavity is communicated with a right cavity with a left opening, a right screw rod is rotatably connected between the upper wall and the lower wall of the right cavity, a right worm wheel is fixedly connected to the right screw rod, a slide block is connected to the right screw rod through threads, the right end of the slide block is abutted against the right wall of the right cavity, a horizontal leftward lead hook is inserted at the left end of the slide block, a hook is fixedly connected to the left end of the lead hook, a left cavity with a right opening is communicated with the left end of the middle cavity, a left screw rod is rotatably connected between the upper wall and the lower wall of the left cavity, threads are arranged on the left screw rod, a left worm wheel is fixedly connected to the left screw rod, a connecting plate is connected to the left screw rod through threads, a bottom rotating block is rotatably connected, the connecting plate is provided with a limiting hole which is vertically communicated, the elastic metal sheet passes through the limiting hole, the lower end of the connecting plate is rotatably connected with a meshing shaft, the lower end of the meshing shaft is fixedly connected with a meshing wheel, the lower wall of the left cavity is fixedly connected with a resisting spring, the upper end of the resisting spring is fixedly connected with a resisting block, the upper wall of the upper cavity is communicated with a rotating hole, the rotating hole is rotatably connected with a pin seat, an upward-opening pin slot is arranged in the pin seat, the upper end of the base is rotatably connected with a rear shaft, the rear shaft is connected with a wire pressing slide block through threads, the right end of the wire pressing slide block is provided with a wire pressing cavity, the upper wall of the wire pressing cavity is fixedly connected with a wire pressing plate, the wire pressing plate is abutted against the lower wall of the wire pressing cavity, the front side of the rear shaft is provided with a wire pressing slide block, and a connecting rod is fixedly connected between the front wheel and the line pressing slide block, and a line barrel is sleeved on the elastic metal sheet.

2. A domestic automatic needle threading device according to claim 1, characterized in that: the improved motor is characterized in that a motor cavity is arranged in the base, a motor ejector rod is fixedly connected to the right wall of the motor cavity, a motor is fixedly connected to the left end of the motor ejector rod, a motor shaft is dynamically connected to the left end of the motor, the motor shaft rotates leftwards and is connected between the upper cavity and the motor cavity in a sliding mode, middle driving bevel teeth are fixedly connected to the motor shaft, and middle driven bevel teeth are fixedly connected to the front end of a middle driven shaft.

3. A domestic automatic needle threading device according to claim 1, characterized in that: the rear shaft is connected with the upper wall of the upper cavity in a rotating mode and extends downwards into the upper cavity, the lower end of the rear shaft is fixedly connected with an upper worm wheel, the rear wall of the upper cavity is connected with a left driven worm in a rotating mode, the right end of the upper worm wheel is meshed with the left driven worm, the front end of the left driven worm is fixedly connected with a left driven bevel gear, and the left end of the motor shaft is fixedly connected with a left driving bevel gear.

4. A domestic automatic needle threading device according to claim 1, characterized in that: the upper cavity right wall is connected with a magnet in a rotating mode, the motor shaft penetrates through the magnet in a rotating mode, a magnet groove with a left opening is formed in the magnet, the magnet groove right wall is fixedly connected with a right top spring, the left end of the right top spring is fixedly connected with a right driving bevel gear, and the right driving bevel gear is connected to the motor shaft in a sliding mode.

5. A domestic automatic needle threading device according to claim 1, characterized in that: the left wall and the right wall of the contact pin groove are symmetrically and respectively fixedly connected with a contact pin spring, and the opposite ends of the contact pin spring are respectively and fixedly connected with a contact pin piece.

Technical Field

The invention relates to the field of textile correlation, in particular to a household automatic threading device for sewing needles.

Background

At present, the clothes can be broken due to thread falling off during wearing, people can often repair the clothes by themselves through sewing, however, the eye of a sewing needle which is commonly prepared at home is small, particularly for old people with poor eyesight and inflexible hands, the threading of the sewing needle is very troublesome, and the old people can be easily punctured by the sewing needle during threading.

Disclosure of Invention

The invention aims to provide a household automatic threading device for a sewing needle, which solves the problem that the threading is difficult when the needle hole of the sewing needle is too small.

The invention is realized by the following technical scheme.

The invention relates to a household automatic needle threading device, which comprises a base, wherein a sliding cavity is arranged in the base in a left-right through way, the upper wall of the sliding cavity is provided with an upper cavity communicated with the upper wall of the sliding cavity, a sliding seat is arranged between the front wall and the rear wall of the sliding cavity in a left-right sliding way, a middle cavity with an upward opening is arranged in the sliding seat, the rear wall of the middle cavity is provided with a rear groove communicated with the rear wall of the middle cavity, a left chain shaft is arranged between the rear wall of the rear groove and the front wall of the middle cavity in a rotating and left-right sliding way, a top rod is fixedly connected to the right wall of the rear groove, the left end of the top rod is rotatably connected to the right end of the left chain shaft, a right chain shaft is arranged between the front wall and the rear wall of the middle cavity in a rotating and left-right sliding way, the left chain shaft and the right chain shaft are respectively and fixedly connected with chain wheels, a chain is tensioned between the two, the rear wall of the upper cavity is rotatably connected with a middle driven shaft, the middle driven shaft is fixedly connected with a chain driving wheel, the lower end of the chain driving wheel is meshed with the upper end of the chain, the right end of the middle cavity is communicated with a right cavity with a left opening, a right screw rod is rotatably connected between the upper wall and the lower wall of the right cavity, the right screw rod is fixedly connected with a right worm wheel, the right screw rod is connected with a slide block through threads, the right end of the slide block is propped against the right wall of the right cavity, the left end of the slide block is inserted with a horizontal leftward lead hook, the left end of the lead hook is fixedly connected with a hook, the left end of the middle cavity is communicated with a left cavity with a right opening, the upper wall and the lower wall of the left cavity are rotatably connected with a left screw rod, threads are arranged on the left screw rod, the left screw rod is fixedly connected with a left worm wheel, the upper end of the bottom rotary block is bilaterally and symmetrically fixedly connected with an elastic metal sheet, the connecting plate is provided with a limiting hole which is communicated up and down, the elastic metal sheet passes through the limiting hole, the lower end of the connecting plate is rotatably connected with a meshing shaft, the lower end of the meshing shaft is fixedly connected with a meshing wheel, the lower wall of the left cavity is fixedly connected with a resisting spring, the upper end of the resisting spring is fixedly connected with a resisting block, the upper wall of the upper cavity is communicated with a rotary hole, the rotary hole is rotatably connected with a pin base, a pin slot with an upward opening is arranged in the pin base, the upper end of the base is rotatably connected with a rear shaft, the rear shaft is connected with a line pressing slide block through threads, the right end of the line pressing slide block is provided with a line pressing cavity, the upper wall of the line pressing cavity is fixedly connected with a line pressing spring, the lower end of the line pressing spring is, the front shaft is connected with a front wheel in an up-and-down sliding manner, a connecting rod is fixedly connected between the front wheel and the line pressing sliding block, a line barrel is sleeved on the elastic metal sheet, the snap ring is not abutted against the left chain shaft and the right chain shaft in an initial state, the left worm wheel is not meshed with the left chain shaft, the right worm wheel is not meshed with the right chain shaft, the connecting plate is connected to the lower tail end of the thread of the left screw rod, the meshing wheel is meshed between the left worm wheel and the bottom rotating block, when the sewing needle is used, the needle point of the sewing needle is downwards inserted into the needle inserting groove to be fixed, the needle inserting seat rotates to drive the sewing needle to rotate so as to enable the needle eye of the sewing needle to be aligned to the left end and the right end, the line barrel is sleeved on the outer sides of the left elastic metal sheet and the right elastic metal sheet, the line barrel is fixed through the elasticity of the elastic metal sheet, a spun line on the line barrel is pulled out rightwards and is hung at the, at the moment, the ejector rod pushes the left chain shaft leftwards, so that the left chain shaft is driven to be meshed with the left worm wheel leftwards, the chain driving wheel rotates, so that the chain is driven to rotate, so that the left chain shaft is driven to rotate through the chain wheel on the left side, so that the meshing wheel is driven to rotate through the left worm wheel, so that the elastic metal sheet is driven to rotate by the bottom rotating block with the bottom rotating block as a rotating center, so that the bobbin is driven to rotate and the spun yarn is tightened, the spun yarn between the yarn pressing sliding block and the front wheel is straightened, then the ejector rod pulls the left chain shaft rightwards, so that the right chain shaft is driven to move rightwards through the fixing plate until the right chain shaft is meshed with the right worm wheel, the chain driving wheel rotates to drive the chain to rotate, and further the right chain shaft is driven to rotate through, then the right worm wheel drives the right screw rod to rotate, the slider drives the lead hook to move up and down to transversely align with a needle eye of a sewing needle, the bidirectional push rod drives the snap ring on the right side to rightwards abut against the right chain shaft, the bidirectional push rod drives the snap ring on the left side to leftwards abut against the left chain shaft, the left chain shaft and the right chain shaft are fixed relative to the fixed plate, the chain driving wheel clockwise rotates to drive the chain to leftwards translate, the left chain shaft and the right chain shaft are driven by the fixed plate to leftwards translate, the slide seat is driven to leftwards translate, the lead hook is driven to leftwards translate and penetrate through the needle eye of the sewing needle, the hook of the lead hook is continuously rightwards positioned at the left end of a textile thread between the thread pressing slider and the front wheel, and the bidirectional push rod drives the snap ring to move back to the original position and does not abut against the left chain shaft and the right chain shaft, the ejector rod drives the left chain shaft to move left and is meshed with the left worm wheel, the left chain shaft drives the left worm wheel to rotate reversely, the connecting plate is driven to move upwards through the left screw rod, so that the limiting hole is driven to upwards interfere with the elastic metal sheets and clamp the two elastic metal sheets inwards, the elastic metal sheet loosens the bobbin, the bobbin can rotate freely, the snap ring supports against the left chain shaft and the right chain shaft again, the chain driving wheel rotates anticlockwise to drive the chain to translate rightwards, thereby driving the left chain shaft and the right chain shaft to translate to the right through the fixing plate, further driving the lead wire hook to move to the right through the sliding seat, and the thread pressing slider and the front wheel are hooked by the hook at the left end of the thread guiding hook and penetrate through the needle eye of the sewing needle rightwards, and the sewing needle with the threaded thread can be taken down from the needle inserting seat for use.

Preferably, be equipped with the motor chamber in the base, motor chamber right wall has linked firmly motor ejector pin, motor ejector pin left end has linked firmly the motor, motor left end power is connected with the motor shaft, motor shaft to the left rotation and sliding connection in the epicoele with between the motor chamber, it has well drive awl tooth to link firmly on the motor shaft, well driven shaft front end has linked firmly well driven awl tooth, during the use, motor ejector pin stimulates right the motor, and then passes through the motor shaft drives well drive awl tooth meshes right in well driven awl tooth, the motor starts to drive the motor shaft rotates, and then passes through well drive awl tooth drives well driven awl tooth rotates, and then passes through well driven shaft drives the chain drive wheel rotates.

Preferably, the rear shaft is rotatably connected to the upper wall of the upper chamber in a downward extending manner and extends into the upper chamber, the lower end of the rear shaft is fixedly connected with an upper worm wheel, the rear wall of the upper chamber is rotatably connected with a left driven worm, the right end of the upper worm wheel is meshed with the left driven worm, the front end of the left driven worm is fixedly connected with a left driven bevel gear, the left end of the motor shaft is fixedly connected with a left driving bevel gear, when in use, the motor mandril drives the motor to move leftwards, the left driving bevel gear is driven by the motor shaft to move leftwards and is meshed with the left driven bevel gear, the motor is started to drive the motor shaft to rotate, the left driven bevel gear is driven by the left driving bevel gear to rotate, the upper worm wheel is driven by the left driven worm to rotate, the wire pressing slider is driven by the rear shaft to move upwards and downwards, and the front wheel is, and then the spinning thread tensioned between the thread pressing sliding block and the front wheel is driven to move up and down so as to be opposite to the needle eye of the sewing needle.

Preferably, a magnet is rotatably connected to the right wall of the upper chamber, the motor shaft rotatably penetrates through the magnet, the magnet is provided with a magnet groove with a left opening, the right wall of the magnet groove is fixedly connected with a right top spring, the left end of the right top spring is fixedly connected with a right driving bevel gear, the right driving bevel gear is connected with the motor shaft in a left-right sliding manner, the magnet is disconnected in an initial state, the right driving bevel gear is not meshed with the right driven bevel gear, when in use, after a sewing needle is inserted into the needle inserting groove, the magnet is switched on, so as to generate repulsion force to push the right driving bevel gear to be meshed with the right driven bevel gear leftwards, the motor is started to drive the motor shaft to rotate, and then drive through right side drive awl tooth the right driven awl tooth rotates, and then drive through right driven shaft the needle inserting seat rotates, and then drive the seam needle and rotate and make the eye of the needle just to controlling both ends.

Preferably, the left wall and the right wall of the needle inserting groove are symmetrically and fixedly connected with needle clamping springs respectively, opposite ends of the needle clamping springs are fixedly connected with needle clamping pieces respectively, and when a sewing needle is inserted into the needle inserting groove, the sewing needle is clamped by the needle clamping pieces left and right to fix the position of the sewing needle.

The invention has the beneficial effects that: the invention can automatically carry out the operation of threading the needle and the lead for the household sewing needle, reduces the manual operation, avoids the injury of the sewing needle, inserts the sewing needle into the needle groove, leads the needle eye to be aligned with the needle threading device by rotating the sewing needle, then straightens the textile thread to be opposite to the needle eye, then hooks the textile thread after passing through the needle eye by horizontally moving the needle threading device, drives the textile thread to pass through the needle eye to complete the operation of threading the needle and the lead, and then can take down the sewing needle with the thread for use, thereby being convenient and fast.

Drawings

In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the invention, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.

FIG. 1 is a schematic structural diagram of an embodiment of the present invention;

FIG. 2 is an enlarged schematic view of the embodiment of the present invention at A in FIG. 1;

FIG. 3 is a schematic structural diagram of B-B in FIG. 1 according to an embodiment of the present invention;

FIG. 4 is a schematic structural diagram of C in FIG. 1 according to an embodiment of the present invention.

Detailed Description

The invention will now be described in detail with reference to fig. 1-4, wherein for ease of description the orientations described hereinafter are now defined as follows: the up, down, left, right, and front-back directions described below correspond to the up, down, left, right, and front-back directions in the projection relationship of fig. 1 itself.

With reference to fig. 1-4, the household automatic threading device for sewing needles comprises a base 11, a sliding cavity 25 is arranged in the base 11 in a left-right through manner, the upper wall of the sliding cavity 25 is provided with an upper cavity 57 in a communicated manner, a sliding seat 35 is arranged between the front wall and the rear wall of the sliding cavity 25 in a left-right sliding manner, a middle cavity 23 with an upward opening is arranged in the sliding seat 35, a rear groove 22 is arranged on the rear wall of the middle cavity 23 in a communicated manner, a left chain shaft 24 is arranged between the rear wall of the rear groove 22 and the front wall of the middle cavity 23 in a rotating manner and in a left-right sliding manner, a top rod 68 is fixedly connected to the right wall of the rear groove 22, the left end of the top rod 68 is rotatably connected to the right end of the left chain shaft 24, a right chain shaft 39 is arranged between the front wall and the rear wall of the middle cavity 23 in a rotating manner and in a left-right sliding manner, chain shafts 24 and 39 are respectively fixedly connected with chain wheels 38, a chain, the front end of the fixing plate 41 is fixedly connected with a bidirectional push rod 34, the left end and the right end of the bidirectional push rod 34 are symmetrically and fixedly connected with snap rings 36, the rear wall of the upper cavity 57 is rotatably connected with a middle driven shaft 59, the middle driven shaft 59 is fixedly connected with a chain driving wheel 31, the lower end of the chain driving wheel 31 is meshed with the upper end of a chain 32, the right end of the middle cavity 23 is communicated with a right cavity 42 with a left opening, the upper wall and the lower wall of the right cavity 42 are rotatably connected with a right screw 40, the right screw 40 is fixedly connected with a right worm wheel 37, the right screw 40 is connected with a slide block 43 through threads, the right end of the slide block 43 is propped against the right wall of the right cavity 42, the left end of the slide block 43 is inserted with a horizontal leftward lead hook 44, the left end of the lead hook 44 is fixedly connected with a hook, the left end of the middle cavity 23 is communicated with a left, the left screw 13 is provided with threads, the left screw 13 is fixedly connected with a left worm wheel 21, the left screw 13 is connected with a connecting plate 15 through threads, the lower wall of the left cavity 12 is rotatably connected with a bottom rotating block 17, the upper end of the bottom rotating block 17 is bilaterally and symmetrically fixedly connected with an elastic metal sheet 55, the connecting plate 15 is provided with a limiting hole 14 which is communicated up and down, the elastic metal sheet 55 passes through the limiting hole 14, the lower end of the connecting plate 15 is rotatably connected with a meshing shaft 16, the lower end of the meshing shaft 16 is fixedly connected with a meshing wheel 18, the lower wall of the left cavity 12 is fixedly connected with a resisting spring 20, the upper end of the resisting spring 20 is fixedly connected with a resisting block 19, the upper wall of the upper cavity 57 is communicated with a rotating hole 64, the rotating hole 64 is rotatably connected with a needle inserting seat 63, a needle inserting groove 62 with an upward opening is arranged in the needle inserting seat 63, the upper end of the base 11 is rotatably connected with a rear, the right end of the wire pressing slide block 48 is provided with a wire pressing cavity 47, the upper wall of the wire pressing cavity 47 is fixedly connected with a wire pressing spring 46, the lower end of the wire pressing spring 46 is fixedly connected with a wire pressing plate 45, the wire pressing plate 45 abuts against the lower wall of the wire pressing cavity 47, the front side of the rear shaft 49 is provided with a front shaft 66 which is rotatably connected with the upper end of the base 11, the front shaft 66 is connected with a front wheel 67 in an up-and-down sliding manner, a connecting rod 50 is fixedly connected between the front wheel 67 and the wire pressing slide block 48, a wire barrel 54 is sleeved on the elastic metal sheet 55, the snap ring 36 does not abut against the left chain shaft 24 and the right chain shaft 39 in an initial state, the left worm wheel 21 is not meshed with the left chain shaft 24, the right worm wheel 37 is not meshed with the right chain shaft 39, the connecting plate 15 is connected with the lower tail end of the thread of the left screw 13, the meshing wheel 18 is meshed, inserting the needle point of the sewing needle downwards into the needle inserting groove 62 for fixing, rotating the needle inserting seat 63 to drive the sewing needle to rotate so as to enable the needle hole of the sewing needle to be aligned with the left end and the right end, sleeving the thread bobbin 54 outside the left elastic metal sheet 55 and the right elastic metal sheet 55, fixing the thread bobbin 54 through the elasticity of the elastic metal sheet 55, drawing out the textile thread on the thread bobbin 54 rightwards, hanging the textile thread on the front wheel 67 at the front end and then clamping the front wheel between the thread pressing plate 45 and the lower wall of the thread pressing cavity 47, pushing the left chain shaft 24 leftwards by the ejector rod 68 at the moment, further driving the left chain shaft 24 to be meshed with the left worm wheel 21 leftwards, then driving the chain driving wheel 31 to rotate, further driving the chain 32 to rotate, further driving the left chain shaft 24 to rotate through the left chain wheel 38, further driving the meshing wheel 18 to rotate through the left worm wheel 21, and further driving the elastic metal sheet 55 to rotate by taking the bottom rotating block 17 as a rotating center Then the spool 54 is driven to rotate and the spun yarn is tightened, so that the spun yarn between the yarn pressing slider 48 and the front wheel 67 is straightened, then the ejector rod 68 pulls the left chain shaft 24 rightwards, the right chain shaft 39 is driven to move rightwards through the fixing plate 41 until the spun yarn is meshed with the right worm wheel 37, the chain driving wheel 31 rotates to drive the chain 32 to rotate, the right chain shaft 39 is driven to rotate through the chain wheel 38 on the right side, the right screw 40 is driven to rotate through the right worm wheel 37, the yarn guiding hook 44 is driven to move upwards and downwards through the slider 43 to be transversely aligned with the needle eye of the sewing needle, then the bidirectional push rod 34 drives the snap ring 36 on the right side to rightwards abut against the right chain shaft 39, the bidirectional push rod 34 drives the snap ring 36 on the left side to abut against the left chain shaft 24 leftwards, and at the moment, the left chain shaft 24 and the right chain shaft 39 are fixed relative to, at this time, the chain driving wheel 31 rotates clockwise to drive the chain 32 to translate leftward, and further, the fixing plate 41 drives the left chain shaft 24 and the right chain shaft 39 to translate leftward, and further, the sliding seat 35 translates leftward, and further, the lead hook 44 translates leftward and penetrates through the needle hole of the sewing needle, and continues to move rightward, so that the hook of the lead hook 44 is located at the left end of the textile thread between the thread pressing slider 48 and the front wheel 67, at this time, the bidirectional push rod 34 drives the snap ring 36 to move back to the original position and no longer abuts against the left chain shaft 24 and the right chain shaft 39, the push rod 68 drives the left chain shaft 24 to move leftward and engage with the left worm wheel 21, the left chain shaft 24 drives the left worm wheel 21 to rotate reversely, and further, the left screw 13 drives the connecting plate 15 to move upward, and further, the limiting hole 14 is driven to upwardly interfere with the elastic metal sheets 55 and clamp the two elastic metal sheets 55 inward, then the elastic metal sheet 55 loosens the bobbin 54, at this time, the bobbin 54 can rotate freely, the snap ring 36 abuts against the left chain shaft 24 and the right chain shaft 39 again, the chain driving wheel 31 rotates counterclockwise to drive the chain 32 to translate rightward, further, the fixing plate 41 drives the left chain shaft 24 and the right chain shaft 39 to translate rightward, further, the slide carriage 35 drives the thread guiding hook 44 to move rightward, further, the hook at the left end of the thread guiding hook 44 hooks the textile thread between the thread pressing slider 48 and the front wheel 67 and passes through the needle eye of the sewing needle rightward, and at this time, the sewing needle with the textile thread can be taken down from the needle inserting seat 63 for use.

Advantageously, a motor cavity 74 is arranged in the base 11, a motor push rod 75 is fixedly connected to the right wall of the motor cavity 74, the left end of the motor mandril 75 is fixedly connected with a motor 73, the left end of the motor 73 is connected with a motor shaft 29, the motor shaft 29 rotates to the left and is slidably connected between the upper chamber 57 and the motor chamber 74, the motor shaft 29 is fixedly connected with a middle driving bevel gear 30, the front end of the middle driven shaft 59 is fixedly connected with a middle driven bevel gear 58, when in use, the motor mandril 75 pulls the motor 73 rightwards, the motor shaft 29 drives the middle driving bevel gear 30 to be meshed with the middle driven bevel gear 58 rightwards, the motor 73 is started to drive the motor shaft 29 to rotate, the intermediate driving bevel gear 30 drives the intermediate driven bevel gear 58 to rotate, and the intermediate driven shaft 59 drives the chain driving wheel 31 to rotate.

Beneficially, the rear shaft 49 is connected to the upper wall of the upper chamber 57 in a downward rotating manner and extends downward into the upper chamber 57, the lower end of the rear shaft 49 is fixedly connected with the upper worm wheel 26, the rear wall of the upper chamber 57 is connected with the left driven worm 28 in a rotating manner, the right end of the upper worm wheel 26 is meshed with the left driven worm 28, the front end of the left driven worm 28 is fixedly connected with the left driven bevel gear 27, the left end of the motor shaft 29 is fixedly connected with the left driving bevel gear 56, in use, the motor push rod 75 drives the motor 73 to move left, further the motor shaft 29 drives the left driving bevel gear 56 to move left and is meshed with the left driven bevel gear 27, the motor 73 is started to drive the motor shaft 29 to rotate, further the left driven bevel gear 56 drives the upper worm wheel 26 to rotate, further, the rear shaft 49 rotates to drive the line pressing slider 48 to move up and down, the connecting rod 50 drives the front wheel 67 to move up and down, and further drives the textile thread tensioned between the thread pressing slide block 48 and the front wheel 67 to move up and down so as to be opposite to the needle eye of the sewing needle.

Beneficially, a magnet 72 is rotatably connected to the right wall of the upper chamber 57, the motor shaft 29 rotatably penetrates through the magnet 72, a magnet slot 71 with a left opening is formed in the magnet 72, a right top spring 70 is fixedly connected to the right wall of the magnet slot 71, a right driving bevel gear 69 is fixedly connected to the left end of the right top spring 70, the right driving bevel gear 69 is slidably connected to the motor shaft 29 left and right, in an initial state, the magnet 72 is turned off, the right driving bevel gear 69 is not engaged with the right driven bevel gear 33, in use, after a suture needle is inserted into the needle inserting slot 62, the magnet 72 is turned on, and then a repulsive force is generated to push the right driving bevel gear 69 to be engaged with the right driven bevel gear 33 leftwards, the motor 73 is started to drive the motor shaft 29 to rotate, and then the right driven bevel gear 33 is driven to rotate by the right driving bevel gear 69, and then the needle inserting seat 63 is driven to rotate by the right driven shaft 65, and then the sewing needle is driven to rotate, so that the needle eye is right opposite to the left end and the right end.

Advantageously, needle clamping springs 61 are symmetrically and respectively attached to the left wall and the right wall of the needle inserting groove 62, needle clamping sheets 60 are respectively attached to opposite ends of the needle clamping springs 61, and when a needle is inserted into the needle inserting groove 62, the needle is clamped left and right through the needle clamping sheets 60 to fix the position of the needle.

The following detailed description of the steps of the automatic threading device for domestic sewing needle will be made with reference to fig. 1 to 4:

in the initial state, the snap ring 36 is not abutted against the left chain shaft 24 and the right chain shaft 39, the left worm wheel 21 is not meshed with the left chain shaft 24, the right worm wheel 37 is not meshed with the right chain shaft 39, the connecting plate 15 is connected to the lower tail end of the thread of the left screw 13, the meshing wheel 18 is meshed between the left worm wheel 21 and the bottom rotating block 17, the magnet 72 is disconnected, and the right driving bevel gear 69 is not meshed with the right driven bevel gear 33.

When the sewing machine is used, the needle point of the sewing needle is downwards inserted into the needle inserting groove 62 for fixing, the magnet 72 is switched on, then repulsion force is generated to push the right driving bevel gear 69 to be meshed with the right driven bevel gear 33 leftwards, the motor 73 is started to drive the motor shaft 29 to rotate, further the right driving bevel gear 69 drives the right driven bevel gear 33 to rotate, further the right driven shaft 65 drives the needle inserting seat 63 to rotate, the needle inserting seat 63 rotates to drive the sewing needle to rotate, further the needle eye of the sewing needle is aligned with the left end and the right end, the bobbin 54 is sleeved outside the left elastic metal sheet 55 and the right elastic metal sheet 55, further the bobbin 54 is fixed through the elasticity of the elastic metal sheet 55, textile threads on the bobbin 54 are pulled rightwards and hung at the front end of the front wheel 67 to be clamped between the thread pressing plate 45 and the lower wall of the thread pressing cavity 47, at the moment, the ejector rod 68 pushes the left chain shaft 24 leftwards, further drives, the motor shaft 29 drives the middle driving bevel gear 30 to be engaged with the middle driven bevel gear 58 rightwards, the motor 73 is started to drive the motor shaft 29 to rotate, the middle driven bevel gear 58 is driven to rotate by the middle driving bevel gear 30, the chain driving wheel 31 is driven to rotate by the middle driven shaft 59, the chain 32 is driven to rotate, the left chain shaft 24 is driven to rotate by the left chain wheel 38, the engaging wheel 18 is driven to rotate by the left worm wheel 21, the elastic metal sheet 55 is driven to rotate by the bottom rotating block 17 by the rotating block 17, the bobbin 54 is driven to rotate and tighten the textile yarns, the textile yarns between the yarn pressing slide block 48 and the front wheel 67 are straightened, the motor mandril 75 drives the motor 73 to move leftwards, the left driving bevel gear 56 is driven to move leftwards by the motor shaft 29 and is engaged with the left driven bevel gear 27, the motor 73 is started to drive the motor shaft 29 to rotate, and the left driven bevel gear 27 is, then the upper worm wheel 26 is driven by the left driven worm 28 to rotate, and then the thread pressing slide block 48 is driven by the rotation of the rear shaft 49 to move up and down, and then the front wheel 67 is driven by the connecting rod 50 to move up and down, and further the textile thread tensioned between the thread pressing slide block 48 and the front wheel 67 is driven to move up and down to be opposite to the needle eye of the sewing needle, then the top rod 68 pulls the left chain shaft 24 to the right, and further drives the right chain shaft 39 to move right through the fixing plate 41 until the right chain shaft 39 is meshed with the right worm wheel 37, the chain driving wheel 31 rotates to drive the chain 32 to rotate, and further drives the right chain shaft 39 to rotate through the right chain wheel 38, and further drives the right screw 40 to rotate through the right worm wheel 37, and further drives the thread guiding hook 44 to move up and down through the sliding block 43 to transversely be opposite to the needle eye of, at this time, the left chain shaft 24 and the right chain shaft 39 are fixed relative to the fixing plate 41, at this time, the chain driving wheel 31 rotates clockwise to drive the chain 32 to translate leftward, further the fixing plate 41 drives the left chain shaft 24 and the right chain shaft 39 to translate leftward, further the sliding seat 35 translates leftward, further the lead hook 44 translates leftward and penetrates through the needle eye of the sewing needle, and further rightward, so that the hook of the lead hook 44 is positioned at the left end of the textile thread between the thread pressing slider 48 and the front wheel 67, at this time, the two-way push rod 34 drives the snap ring 36 to move back to the original position and does not abut against the left chain shaft 24 and the right chain shaft 39 any more, the ejector rod 68 drives the left chain shaft 24 to move leftward and engage with the left worm wheel 21, the left chain shaft 24 drives the left worm wheel 21 to rotate reversely, further the connecting plate 15 is driven by the left screw 13 to move upward, further the limiting hole 14 is driven to interfere with the elastic metal sheet, at this time, the bobbin 54 can rotate freely, the snap ring 36 supports against the left chain shaft 24 and the right chain shaft 39 again, the chain driving wheel 31 rotates anticlockwise to drive the chain 32 to translate rightwards, then the left chain shaft 24 and the right chain shaft 39 are driven to translate rightwards through the fixing plate 41, then the slide seat 35 drives the lead hook 44 to move rightwards, then the hook at the left end of the lead hook 44 hooks the textile thread between the thread pressing slider 48 and the front wheel 67 and penetrates through the needle eye of the sewing needle rightwards, and the sewing needle with the textile thread can be taken down from the needle inserting seat 63 for use.

The invention has the beneficial effects that: the invention can automatically carry out the operation of threading the needle and the lead for the household sewing needle, reduces the manual operation, avoids the injury of the sewing needle, inserts the sewing needle into the needle groove, leads the needle eye to be aligned with the needle threading device by rotating the sewing needle, then straightens the textile thread to be opposite to the needle eye, then hooks the textile thread after passing through the needle eye by horizontally moving the needle threading device, drives the textile thread to pass through the needle eye to complete the operation of threading the needle and the lead, and then can take down the sewing needle with the thread for use, thereby being convenient and fast.

The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.