CN112226919B

CN112226919B - High-efficient type sewing machine with needle protection mechanism

Info

Publication number: CN112226919B
Application number: CN202011080542.6A
Authority: CN
Inventors: 韩建
Original assignee: Lanxi Zhixiang Crafts Co ltd
Current assignee: Lanxi Zhixiang Crafts Co ltd
Priority date: 2020-10-10
Filing date: 2020-10-10
Publication date: 2022-05-20
Anticipated expiration: 2040-10-10
Also published as: CN112226919A

Abstract

The invention discloses a high-efficiency sewing machine with a needle protection mechanism, and relates to a sewing machine accessory, which comprises a sewing machine main body, wherein a driving assembly is arranged on the sewing machine main body, a sewing machine needle rod is arranged on the driving assembly, a sewing machine needle is detachably connected to the sewing machine needle rod, a needle sleeve is sleeved on the surface of the sewing machine needle, and a connecting groove is formed in the surface of the needle sleeve. According to the invention, through the mutual matching of the first torsion spring, the second torsion spring, the support spring, the toothed plate groove, the telescopic sleeve, the smoothing roller, the adapter sleeve, the adapter groove, the connecting seat, the needle sleeve and other structures, the fabric can be smoothed, and through smoothing the fabric, on one hand, the stitch can be prevented from generating errors, the linear trend of the stitch is ensured, on the other hand, the situation that the sewing machine needle is bent due to larger resistance is avoided, so that a higher protection effect on the sewing machine needle can be achieved.

Description

High-efficient type sewing machine with needle protection mechanism

Technical Field

The invention relates to a sewing machine accessory, in particular to a high-efficiency sewing machine with a needle protection mechanism.

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 interweave or sew one or more layers of sewing materials, the sewing machine can sew fabrics such as cotton, hemp, silk, wool, artificial fiber and the like and products such as leather, plastics, paper and the like, the sewed stitches are neat, beautiful, flat and firm, the sewing speed is high, and the use is simple and convenient. The artistic forms of hand-push embroidery, computer embroidery and the like are derived, after the industrial revolution in the middle of 18 th century, the invention and the development of a sewing machine are promoted by the large production of the textile industry, german registered a sewing machine patent in the United kingdom in 1755 years without any examination, and in 1790, the first single-thread chain type stitch hand-operated sewing machine for punching holes first, threading later and sewing leather shoes is invented by woodwork Thomas and Shante in the United kingdom. In 1841, french tailor b.timoniy invented and manufactured a chain stitch sewing machine with machine needles with hooks. In 1845, ilais haugh also invented a sewing machine independently, in 1851, us machinist i.m. heuchai invented a lockstitch sewing machine and established heuchai corporation. The sewing machine of this period is basically of the hand-operated type.

A sewing machine is a working machine widely used in the production fields of making bags, making clothes and the like. The patent number CN 209759755U describes a novel needle guard for sewing machine, which comprises a connecting rod, a protective frame, a protective plate and a clamping device, wherein the rear part of the connecting rod is welded with the front side of the top of the clamping device, the front end of the bottom of the connecting rod is welded with the protective frame, the left part of the inner side of the protective frame is bonded with the protective plate, the clamping device consists of a mounting sleeve, a mounting groove, a clamping mechanism, a hoop, a lug, a clamping groove and a clamping block, the front side of the top of the mounting sleeve is welded with the connecting rod, the mounting groove is embedded in the inner side of the mounting sleeve, the inner side of the mounting groove is welded with the clamping mechanism, the inner side of the clamping mechanism is welded with the hoop, the middle part of the inner side of the hoop is welded with the lug, the left part of the front side of the top of the hoop is provided with the clamping groove, draw-in groove top surface carries out sliding connection with the fixture block, the fixture block right side welds with the clamp, clamping mechanism by first compression spring, first clamping piece, second compression spring, the second clamping piece, third compression spring and third clamping piece are constituteed "and" need install it with the bolt for solving, make its problem of installation inconvenience, chucking device has been installed at the connecting rod rear side, install the inboard lug of clamp and sewing machine's connecting block, the lug drives the clamp and expands to the outside, make the clamp drive first compression spring through first clamping piece, second clamping piece and third clamping piece, second compression spring and third compression spring compress, first compression spring, second compression spring and third compression spring produce reaction force and press from both sides the clamp, make the clamp drive the lug and carry out the chucking with sewing machine's connecting block, reach the beneficial effect that can carry out quick installation "the needle protector that this patent need to solve needs the technical problem of prior art The utility model discloses a sewing machine, including the sewing machine needle, the sewing machine needle is installed to it, the bolt is to be installed it, make its installation inconvenient, and this patent has solved this technical problem through mutually supporting of the clamping device of design, the installation cover, the mounting groove, this patent still has some weak points, can not smooth the surface fabric of wanting the tailor, when meetting the surface fabric that the texture is thicker, can increase the resistance that the sewing machine needle received in higher degree, lead to the sewing machine needle to buckle because of the resistance that receives is too high, the unevenness of surface fabric, it is wrong still to make the stitch appear easily, can't guarantee the linear trend of stitch, consequently, an urgent need for an efficient type sewing machine who has needle guard mechanism on the market at present stage solves above-mentioned problem.

Disclosure of Invention

The invention aims to solve the defects in the prior art, such as: the fabric to be sewn can not be smoothed, when the fabric with thick texture is met, the resistance of the sewing machine needle can be increased to a higher degree, the sewing machine needle is bent due to overhigh resistance, the fabric is uneven, the stitch is easy to be mistaken, the linear trend of the stitch cannot be ensured, and the high-efficiency sewing machine with the needle protection mechanism is provided.

In order to achieve the purpose, the invention adopts the following technical scheme:

the utility model provides a high-efficient type sewing machine with needle protection mechanism, includes the sewing machine main part, be provided with drive assembly in the sewing machine main part, the last sewing machine needle bar that is provided with of drive assembly, the last sewing machine needle that can dismantle of sewing machine needle bar is connected with, the surface cover of sewing machine needle is established the needle cover, the spread groove has been seted up on the surface of needle cover, the spread groove endotheca is equipped with the connecting seat, the top fixedly connected with switching cover of connecting seat to the position that the inside wall of needle cover corresponds the spread groove has seted up the pinion rack groove, sliding connection has the pinion rack in the pinion groove, the pinion is meshed with the external tooth line that switching cover surface was seted up, the top of pinion passes through supporting spring and the top fixed connection of pinion inslot side, the position that the inside of needle cover corresponds the pinion has cup jointed flexible cover, the compression roller groove is seted up to the bottom of connecting seat, and a smoothing roller is arranged in the compression roller groove.

Furthermore, a connecting hole is formed in the position, corresponding to the sewing machine needle, of the top of the needle sleeve, and the sewing machine needle is located in the connecting hole.

Furthermore, the gear plate groove and the connecting groove are in a communicated state, and the top of the needle sleeve is fixedly connected with the bottom end of the needle rod of the sewing machine through the supporting rod.

Furthermore, a transfer groove is formed in the side face of the transfer sleeve, a first bearing is connected in the transfer groove in a clamping mode, a first transfer shaft is connected inside the first bearing in a sleeved mode, and the end portion of the first transfer shaft is fixedly connected with the side end face inside the connection groove.

Furthermore, a first torsion spring is sleeved on the surface of the first adapter shaft, one end of the first torsion spring is fixedly connected to the surface of the first adapter shaft, and the other end of the first torsion spring is fixedly connected to the inner side wall of the adapter groove.

Furthermore, the end face of the smoothing roller is clamped with a second bearing, a second transfer shaft is sleeved in the second bearing, and the end part of the second transfer shaft is fixedly connected with the side end inside the connecting groove.

Furthermore, a second torsion spring is sleeved on the surface of the second transfer shaft, one end of the second torsion spring is fixedly connected to the surface of the second transfer shaft, the other end of the second torsion spring is fixedly connected with the side face, close to the side plate seat, of the side plate seat, and the surface of the side plate seat is fixedly connected with the inner side wall of the smoothing roller.

Furthermore, the bottom of the telescopic sleeve is fixedly connected with a sliding panel, and the overlooking section of the sliding panel is of a square structure.

Furthermore, the connecting groove and the connecting seat are both rectangular in section shape when viewed from above, and the length of the connecting seat is larger than the inner diameter of the connecting groove.

Further, the needle sleeve is transparent, and the wall thickness of the needle sleeve is 0.6 cm.

Compared with the prior art, the invention has the beneficial effects that:

(1) according to the invention, the fabric can be smoothed by mutually matching the designed structures such as the first torsion spring, the second torsion spring, the support spring, the toothed plate groove, the telescopic sleeve, the smoothing roller, the adapter sleeve, the adapter groove, the connecting seat and the needle sleeve, on one hand, the stitch can be prevented from being mistaken, the linear trend of the stitch is ensured, on the other hand, the situation that the needle of the sewing machine is bent due to larger resistance is avoided, and thus, a higher protection effect on the needle of the sewing machine can be achieved.

(2) According to the invention, through the designed supporting spring, the toothed plate groove, the telescopic sleeve and the sliding panel, in a natural state, under the action of gravity and supporting spring elasticity, one end of the telescopic sleeve connected with the sliding panel is positioned outside the needle sleeve, and under the action of self gravity and supporting spring elasticity, the toothed plate is positioned at the bottommost part of the inner side of the toothed plate groove, and the switching groove rotates under the pushing of the toothed plate and drives the connecting seat to be tightly attached to the connecting groove, so that the stability of the connecting seat in the connecting groove can be ensured.

(3) The invention relates to a sewing machine needle sleeve, which comprises a first torsion spring, a first bearing, a first transfer shaft, a transfer sleeve, a toothed plate and a connecting seat, wherein the first torsion spring, the first bearing, the first transfer shaft, the transfer sleeve, the toothed plate and the connecting seat are designed, a sliding surface plate can be associated with a fabric in the process of driving a sewing machine needle rod and a sewing machine needle on the sewing machine needle rod to move downwards by a driving assembly, a telescopic sleeve can drive the toothed plate to move upwards and push the transfer sleeve to rotate in the process of continuously moving downwards, the connecting seat is driven by the transfer sleeve to perform opening action in a connecting groove, the needle sleeve can continuously move downwards after the sliding surface plate is completely immersed in the needle sleeve, a smoothing roller at the moment is connected with a panel, and the connecting seat can always keep a certain tightening state under the effect of torsion force exerted by the first torsion spring in the next process, so that certain pressure exists between the smoothing roller and the fabric, thereby better smoothing the fabric, through smoothing the surface fabric, on the one hand, can avoid the stitch to appear the mistake, guaranteed the linear trend of stitch, on the other hand, resistance through receiving is on the large side, and takes place to buckle to can play higher protection effect to the sewing machine eedle.

(4) According to the invention, through the second torsion spring, the second bearing, the smoothing roller and the pressing roller groove, when the smoothing roller smoothes the fabric, the smoothing roller has a certain rotation trend under the action of friction force and side pressure, on one hand, the stability of the smoothing roller can be improved, the friction force between the fabric and the smoothing roller can be ensured, and the smoothing effect of the smoothing roller can be ensured under the action of the elastic force of the second torsion spring, on the other hand, the excessive friction force between the smoothing roller and the fabric can be avoided, so that a certain protection effect can be played on the fabric.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be 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 that other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic perspective view of the present invention;

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

FIG. 3 is a schematic perspective view of the needle cover of the present invention;

FIG. 4 is a schematic cross-sectional view of a face-up view of a smoothing roll according to the present invention;

FIG. 5 is a schematic perspective view of the connecting base of the present invention;

FIG. 6 is a schematic cross-sectional view of the needle hub of the present invention;

FIG. 7 is an enlarged view of the structure at B in the present invention;

FIG. 8 is a schematic perspective view of a smoothing roll according to the present invention

FIG. 9 is a schematic perspective view of the telescopic sleeve of the present invention;

FIG. 10 is a front view of the needle cover of the present invention;

fig. 11 is an enlarged schematic view of the structure at C in the present invention.

The list of components represented by the various reference numbers in the figures is as follows: 1-sewing machine main body; 2-a drive assembly; 3-needle bar of sewing machine; 4-sewing machine needle; 5-sleeve of the needle; 6-connecting hole; 7-a support bar; 8-connecting grooves; 9-a connecting seat; 10-a first transfer shaft; 11-a first bearing; 12-a transfer tank; 13-a transfer sleeve; 14-a roller groove; 15-smoothing roller; 16-a second transfer shaft; 17-a second bearing; 18-a second torsion spring; 19-side plate base; 20-a telescopic sleeve; 21-a slide panel; 22-a first torsion spring; 23-toothed plate; 24-a toothed plate groove; 25-support the spring.

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 a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within 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, are merely for convenience in describing the present invention and simplifying the 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 thus, should not be construed as limiting the present invention.

Referring to fig. 1-11, a high-efficiency sewing machine with a needle protection mechanism comprises a sewing machine body 1, a driving assembly 2 is arranged on the sewing machine body 1, a sewing machine needle rod 3 is arranged on the driving assembly 2, a sewing machine needle 4 is detachably connected to the sewing machine needle rod 3, a needle sleeve 5 is sleeved on the surface of the sewing machine needle 4, a connecting groove 8 is formed in the surface of the needle sleeve 5, a connecting seat 9 is sleeved in the connecting groove 8, a switching sleeve 13 is fixedly connected to the top of the connecting seat 9, a toothed plate groove 24 is formed in the inner side wall of the needle sleeve 5 corresponding to the connecting groove 8, a toothed plate 23 is slidably connected in the toothed plate groove 24, the toothed plate 23 is meshed with an external toothed line formed in the surface of the switching sleeve 13, the top of the toothed plate 23 is fixedly connected with the top of the inner side of the toothed plate groove 24 through a supporting spring 25, and the toothed plate groove 24 are designed through the supporting spring 25, the toothed plate 23 and the toothed plate groove 24, The retractable sleeve 20 and the sliding panel 21 are naturally, under the action of gravity and the elastic force of the supporting spring 25, one end of the retractable sleeve 20 connected with the sliding panel 21 is located outside the needle guard 5, the toothed plate 23 is located at the lowest part of the inner side of the toothed plate groove 24 under the action of self gravity and the elastic force of the supporting spring 25, the switching groove 12 is pushed by the toothed plate 23 to rotate and drive the connecting seat 9 to be tightly attached to the connecting groove 8, so that the stability of the connecting seat 9 in the connecting groove 8 can be ensured, the retractable sleeve 20 is sleeved at the position corresponding to the toothed plate 23 inside the needle guard 5, the bottom of the connecting seat 9 is provided with a pressure roller groove 14, a leveling roller 15 is arranged in the pressure roller groove 14, and when the fabric is leveled through the second torsion spring 18, the second bearing 17, the leveling roller 15 and the pressure roller groove 14, the leveling roller 15 has a certain rotation trend under the friction force and the lateral pressure, under the effect of the 18 effect of elasticity of second torsion spring, on the one hand, can improve and smooth the stability of roller 15, and then can guarantee the surface fabric and smooth the frictional force between the roller 15, guaranteed to smooth the effect of smoothing of roller 15, on the other hand, can avoid smoothing the frictional force between roller 15 and the surface fabric too big to can play certain guard action to the surface fabric.

Specifically, a connecting hole 6 is formed in the position, corresponding to the sewing machine needle 4, of the top of the needle sleeve 5, and the sewing machine needle 4 is located in the connecting hole 6.

Specifically, be in the state that switches on between pinion rack groove 24 and the spread groove 8, the bottom fixed connection of bracing piece 7 and sewing machine needle bar 3 is passed through at the top of eedle cover 5, supporting spring 25 through the design, pinion rack 23, pinion rack groove 24, flexible cover 20 and sliding plate 21, under the natural state, flexible cover 20 receives under the effect of gravity and supporting spring 25 elasticity, its one end that links to each other with sliding plate 21 is located the outside of pinion rack 5, and pinion rack 23 receives under the effect of self gravity and supporting spring 25 elasticity, be located the bottom most of pinion rack groove 24 inboard, and switching groove 12 takes place to rotate and drives connecting seat 9 and tightly attached in spread groove 8 under the promotion of pinion rack 23, thereby can guarantee the stability of connecting seat 9 in spread groove 8.

Specifically, a switching groove 12 is formed in the side surface of the switching sleeve 13, a first bearing 11 is clamped in the switching groove 12, a first switching shaft 10 is sleeved inside the first bearing 11, and the end portion of the first switching shaft 10 is fixedly connected with the side end surface inside the connecting groove 8.

Specifically, a first torsion spring 22 is sleeved on the surface of the first transfer shaft 10, one end of the first torsion spring 22 is fixedly connected to the surface of the first transfer shaft 10, the other end of the first torsion spring 22 is fixedly connected to the inner side wall of the transfer groove 12, the sliding panel 21 is associated with the fabric through the designed first torsion spring 22, the first bearing 11, the first transfer shaft 10, the transfer sleeve 13, the toothed plate 23 and the connecting seat 9, in the process that the driving component 2 drives the sewing machine needle rod 3 and the sewing machine needle 4 on the sewing machine needle rod 3 to move downwards, the telescopic sleeve 20 drives the toothed plate 23 to move upwards and drives the transfer sleeve 13 to rotate, the connecting seat 9 is driven by the transfer sleeve 13 to perform opening motion in the needle sleeve 8, and after the sliding panel 21 is completely immersed in the needle sleeve 5, the needle sleeve 5 can continue to move downwards, the smoothing roller 15 at this moment is connected with the panel, at next in-process, receive the effect of the torsion that first torsion spring 22 applyed under, can make connecting seat 9 remain certain state of tightening throughout, make and smooth and have certain pressure between roller 15 and the surface fabric, thereby can be better smooth the surface fabric, through smoothing the surface fabric, on the one hand, can avoid the stitch mistake to appear, the linear trend of stitch has been guaranteed, on the other hand, resistance through receiving is bigger than normal, and take place to buckle, thereby can play higher protection effect to sewing machine needle 4.

Specifically, the end face of the smoothing roller 15 is clamped with a second bearing 17, a second transfer shaft 16 is sleeved in the second bearing 17, and the end part of the second transfer shaft 16 is fixedly connected with the side end inside the connecting groove 8.

Specifically, a second torsion spring 18 is sleeved on the surface of the second transfer shaft 16, one end of the second torsion spring 18 is fixedly connected to the surface of the second transfer shaft 16, the other end of the second torsion spring 18 is fixedly connected to a side close to the side plate seat 19, the surface of the side plate seat 19 is fixedly connected to the inner side wall of the smoothing roller 15, through the design of the second torsion spring 18, the second bearing 17, the smoothing roller 15 and the press roller groove 14, when the fabric is smoothed by the smoothing roller 15, the smoothing roller 15 has a certain rotation tendency under the action of friction force and lateral pressure, under the effect of the spring force of the second torsion spring 18, on the one hand, the stability of the smoothing roller 15 can be increased, thereby ensuring the friction force between the fabric and the smoothing roller 15 and the smoothing effect of the smoothing roller 15, on the other hand, the excessive friction force between the flattening roller 15 and the fabric can be avoided, so that the fabric can be protected to a certain extent.

Specifically, a sliding plate 21 is fixedly connected to the bottom of the telescopic sleeve 20, and the cross section of the sliding plate 21 in a plan view is in a square structure.

Specifically, the overlooking cross-sectional shapes of the connecting groove 8 and the connecting seat 9 are both rectangular structures, the length of the connecting seat 9 is larger than the inner diameter of the connecting groove 8, the sliding panel 21 can be associated with fabric in the process that the driving component 2 drives the sewing machine needle 3 and the sewing machine needle 4 on the sewing machine needle rod 3 to move downwards through the designed first torsion spring 22, the first bearing 11, the first switching shaft 10, the switching sleeve 13, the toothed plate 23 and the connecting seat 9, the telescopic sleeve 20 can drive the toothed plate 23 to move upwards and push the switching sleeve 13 to rotate in the process that the sewing machine needle rod 3 continues to move downwards, the connecting seat 9 is driven by the switching sleeve 13 to open in the connecting groove 8, after the sliding panel 21 is completely immersed in the needle sleeve 5, the needle sleeve 5 can continue to move downwards, the leveling roller 15 is connected with the panel at the moment, and in the following process, under the effect of the torsion applied by the first torsion spring 22, can make connecting seat 9 remain certain state of tightening throughout, make to smooth and have certain pressure between roller 15 and the surface fabric to can be better smooth the surface fabric, through smooth the surface fabric, on the one hand, can avoid the stitch mistake to appear, guaranteed the linear trend of stitch, on the other hand, through the resistance that receives on the one hand bigger than normal, and take place to buckle, thereby can play higher protection effect to sewing machine needle 4.

Specifically, the needle guard 5 is transparent, and the wall thickness of the needle guard 5 is 0.6 cm.

In the invention, when a user uses the device, under the action of gravity and the elastic force of the supporting spring 25, the end of the telescopic sleeve 20 connected with the sliding panel 21 is positioned outside the needle sleeve 5, the toothed plate 23 is positioned at the bottommost part of the inner side of the toothed plate groove 24 under the action of self gravity and the elastic force of the supporting spring 25, the switching groove 12 is pushed by the toothed plate 23 to rotate and drive the connecting seat 9 to be tightly attached to the connecting groove 8, so that the stability of the connecting seat 9 in the connecting groove 8 can be ensured, in the descending process of the driving component 2 driving the needle rod 3 of the sewing machine and the needle 4 of the sewing machine on the needle rod 3 of the sewing machine, the sliding panel 21 is associated with fabric, in the continuous descending process of the needle rod 3 of the sewing machine, the telescopic sleeve 20 drives the toothed plate 23 to ascend and push the switching sleeve 13 to rotate, and the connecting seat 9 is driven by the switching sleeve 13 to open in the connecting groove 8, after the sliding panel 21 is completely immersed into the needle guard 5, the needle guard 5 can continuously descend, the leveling roller 15 is connected with the panel at the moment, in the following process, under the action of the torsion force exerted by the first torsion spring 22, the connecting seat 9 can be always kept in a certain tightening state, certain pressure exists between the leveling roller 15 and the fabric, so that the fabric can be better leveled, on one hand, the mistake of the stitch can be avoided by leveling the fabric, the linear trend of the stitch is ensured, on the other hand, the resistance force exerted by the leveling roller 15 is larger, and the bending occurs, so that a higher protection effect can be achieved on the needle 4 of the sewing machine, when the fabric is leveled by the leveling roller 15, the leveling roller 15 has a certain rotation trend under the action of the friction force and the lateral pressure, on the other hand, under the action of the elasticity force of the second torsion spring 18, can improve the stability of smoothing roller 15, and then can guarantee the surface fabric and smooth the frictional force between the roller 15, guaranteed smoothing roller 15's the effect of smoothing, on the other hand, can avoid smoothing the frictional force between roller 15 and the surface fabric too big, thereby can play certain guard action to the surface fabric, when sewing machine needle bar 3 is to the lift-up under drive assembly 2's drive, telescope tube 20 receives gravity and supporting spring 25 elasticity effect down, its one end that links to each other with sliding surface board 21 is located the outside of needle cover 5, and under pinion rack 23 received self gravity and supporting spring 25 elasticity effect, be located the inboard bottommost in pinion rack groove 24, and switching groove 12 takes place to rotate and drive connecting seat 9 and tightly attached in connecting groove 8 under pinion rack 23's promotion, thereby can guarantee the stability of connecting seat 9 in connecting groove 8.

The first embodiment is as follows: under the action of gravity and the elastic force of the supporting spring 25, the end of the telescopic sleeve 20 connected with the sliding panel 21 is located outside the needle sleeve 5, the toothed plate 23 is located at the bottommost part of the inner side of the toothed plate groove 24 under the action of self gravity and the elastic force of the supporting spring 25, the adapting groove 12 is pushed by the toothed plate 23 to rotate and drive the connecting seat 9 to be tightly attached to the connecting groove 8, so that the stability of the connecting seat 9 in the connecting groove 8 can be ensured, in the process that the driving assembly 2 drives the needle bar 3 of the sewing machine and the needle 4 of the sewing machine on the needle bar 3 to move downwards, the sliding panel 21 can be associated with fabric, in the process that the needle bar 3 of the sewing machine continues to move downwards, the telescopic sleeve 20 can drive the toothed plate 23 to move upwards and push the adapting sleeve 13 to rotate, and the connecting seat 9 is driven by the adapting sleeve 13 to perform opening action in the connecting groove 8, smooth panel 21 submerges the inside back of needle cover 5 completely, needle cover 5 can continue down, smooth roller 15 this moment has been connected with the panel, at next in-process, receive under the effect of the torsion that first torsion spring 22 applyed, can make connecting seat 9 remain certain state of tightening all the time, make and smooth and have certain pressure between roller 15 and the surface fabric, thereby can be better smooth the surface fabric, through smooth the surface fabric, on the one hand, can avoid the stitch mistake to appear, the linear trend of stitch has been guaranteed, on the other hand, resistance through receiving is bigger than normal, and take place to buckle, thereby can play higher protection effect to sewing machine needle 4.

Example two: when the fabric is flattened by the flattening roller 15, the flattening roller 15 has a certain rotation trend under the action of friction force and lateral pressure, under the action of the elastic force of the second torsion spring 18, on one hand, the stability of the flattening roller 15 can be improved, and further, the friction force between the fabric and the flattening roller 15 can be ensured, and the flattening effect of the flattening roller 15 can be ensured, on the other hand, the overlarge friction force between the flattening roller 15 and the fabric can be avoided, so that a certain protection effect can be realized on the fabric, when the sewing machine needle rod 3 is driven by the driving component 2 to rise upwards, the telescopic sleeve 20 is under the action of the gravity and the elastic force of the supporting spring 25, one end of the telescopic sleeve connected with the sliding panel 21 is positioned outside the needle sleeve 5, and the toothed plate 23 is positioned at the bottommost part inside the toothed plate groove 24 under the action of the self gravity and the elastic force of the supporting spring 25, and the adapting groove 12 is pushed by the toothed plate 23 to rotate and drive the connecting seat 9 to be tightly attached to the connecting groove 8, so that the stability of the coupling socket 9 in the coupling groove 8 can be ensured.

Example three: under the action of gravity and the elastic force of the supporting spring 25, the end of the telescopic sleeve 20 connected with the sliding panel 21 is located outside the needle sleeve 5, the toothed plate 23 is located at the bottommost part of the inner side of the toothed plate groove 24 under the action of self gravity and the elastic force of the supporting spring 25, the adapting groove 12 is pushed by the toothed plate 23 to rotate and drive the connecting seat 9 to be tightly attached to the connecting groove 8, so that the stability of the connecting seat 9 in the connecting groove 8 can be ensured, in the process that the driving assembly 2 drives the needle bar 3 of the sewing machine and the needle 4 of the sewing machine on the needle bar 3 to move downwards, the sliding panel 21 can be associated with fabric, in the process that the needle bar 3 of the sewing machine continues to move downwards, the telescopic sleeve 20 can drive the toothed plate 23 to move upwards and push the adapting sleeve 13 to rotate, and the connecting seat 9 is driven by the adapting sleeve 13 to perform opening action in the connecting groove 8, after the sliding panel 21 is completely immersed into the needle guard 5, the needle guard 5 can continuously descend, the smoothing roller 15 is connected with the panel at the moment, in the following process, under the effect of the torsion applied by the first torsion spring 22, the connecting seat 9 can be always kept in a certain tightening state, certain pressure exists between the smoothing roller 15 and the fabric, so that the fabric can be better smoothed, on one hand, the stitch can be prevented from being mistaken by smoothing the fabric, the linear trend of the stitch is ensured, on the other hand, the bending can be caused by larger resistance, so that a higher protection effect can be achieved on the needle 4 of the sewing machine, when the fabric is smoothed by the smoothing roller 15, the smoothing roller 15 has a certain rotation trend under the action of the friction force and the lateral pressure, under the effect of the elastic force of the second torsion spring 18, on the one hand, can improve the stability of smoothing roller 15, and then can guarantee the surface fabric and smooth the frictional force between the roller 15, guaranteed smoothing roller 15's the effect of smoothing, on the other hand, can avoid smoothing the frictional force between roller 15 and the surface fabric too big, thereby can play certain guard action to the surface fabric, when sewing machine needle bar 3 is to the lift-up under drive assembly 2's drive, telescope tube 20 receives gravity and supporting spring 25 elasticity effect down, its one end that links to each other with sliding surface board 21 is located the outside of needle cover 5, and under pinion rack 23 received self gravity and supporting spring 25 elasticity effect, be located the inboard bottommost in pinion rack groove 24, and switching groove 12 takes place to rotate and drive connecting seat 9 and tightly attached in connecting groove 8 under pinion rack 23's promotion, thereby can guarantee the stability of connecting seat 9 in connecting groove 8.

The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. The utility model provides a high-efficient type sewing machine with needle protection mechanism, includes sewing machine main part (1), its characterized in that, be provided with drive assembly (2) on sewing machine main part (1), be provided with sewing machine needle bar (3) on drive assembly (2), sewing machine needle (4) can be dismantled and be connected with on sewing machine needle bar (3), needle cover (5) have been established to the surface cover of sewing machine needle (4), spread groove (8) have been seted up on the surface of needle cover (5), spread groove (8) endotheca is equipped with connecting seat (9), the top fixedly connected with switching cover (13) of connecting seat (9) to gear board groove (24) have been seted up to the position that needle cover (5) inside wall corresponds spread groove (8), sliding connection has pinion rack (23) in pinion groove (24), pinion (23) and the external tooth line that switching cover (13) surface was seted up intermeshed, the top of the toothed plate (23) is fixedly connected with the top of the inner side of the toothed plate groove (24) through a supporting spring (25), a telescopic sleeve (20) is sleeved at a position, corresponding to the toothed plate (23), in the needle sleeve (5), a compression roller groove (14) is formed in the bottom of the connecting seat (9), and a smoothing roller (15) is arranged in the compression roller groove (14);

a transfer groove (12) is formed in the side face of the transfer sleeve (13), a first bearing (11) is connected in the transfer groove (12) in a clamping mode, a first transfer shaft (10) is sleeved inside the first bearing (11), and the end portion of the first transfer shaft (10) is fixedly connected with the side end face inside the connection groove (8);

and a first torsion spring (22) is sleeved on the surface of the first transfer shaft (10), when one end of the first torsion spring (22) is fixedly connected to the surface of the first transfer shaft (10), the other end of the first torsion spring (22) is fixedly connected with the inner side wall of the transfer groove (12).

2. The high-efficiency sewing machine with the needle protection mechanism is characterized in that a connecting hole (6) is formed in the position, corresponding to the sewing machine needle (4), of the top of the needle guard (5), and the sewing machine needle (4) is located in the connecting hole (6).

3. A high efficiency sewing machine with a needle guard mechanism as claimed in claim 1 wherein the said gear plate groove (24) and the connecting groove (8) are in communication, and the top of the needle guard (5) is fixedly connected with the bottom end of the sewing machine needle bar (3) through the support bar (7).

4. The high-efficiency sewing machine with the needle protection mechanism is characterized in that a second bearing (17) is clamped on the end face of the smoothing roller (15), a second transfer shaft (16) is sleeved in the second bearing (17), and the end part of the second transfer shaft (16) is fixedly connected with the side end inside the connecting groove (8).

5. A high-efficiency sewing machine with a needle protection mechanism according to claim 4, characterized in that a second torsion spring (18) is sleeved on the surface of the second transfer shaft (16), one end of the second torsion spring (18) is fixedly connected to the surface of the second transfer shaft (16), the other end of the second torsion spring (18) is fixedly connected to a face close to the side plate seat (19), and the surface of the side plate seat (19) is fixedly connected to the inner side wall of the leveling roller (15).

6. The high-efficiency sewing machine with the needle protection mechanism according to claim 1, wherein a sliding plate (21) is fixedly connected to the bottom of the telescopic sleeve (20), and the cross section of the sliding plate (21) is in a square structure in plan view.

7. The high-efficiency sewing machine with a needle protection mechanism according to claim 1, wherein the connecting slot (8) and the connecting seat (9) are both rectangular in cross-sectional shape in plan view, and the length of the connecting seat (9) is greater than the inner diameter of the connecting slot (8).

8. A high efficiency sewing machine with a needle guard mechanism as claimed in claim 1 wherein the needle guard (5) is transparent and the wall thickness of the needle guard (5) is 0.6 cm.