CN102296430A - Loading and feeding mechanism for sewing machine - Google Patents
Loading and feeding mechanism for sewing machine Download PDFInfo
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- CN102296430A CN102296430A CN2010102110173A CN201010211017A CN102296430A CN 102296430 A CN102296430 A CN 102296430A CN 2010102110173 A CN2010102110173 A CN 2010102110173A CN 201010211017 A CN201010211017 A CN 201010211017A CN 102296430 A CN102296430 A CN 102296430A
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- plate stem
- presser feet
- pressure bar
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Abstract
The invention discloses a loading and feeding mechanism which is loaded on a vertical feeding sewing machine for preventing a pull rod from swinging and preventing a sewed object from shaking or a component from early-stage wear. The loading and feeding mechanism (100) is provided with a pressing rod (137) and the pull rod (133), wherein the lower end part of the pressing rod (137) is provided with a middle pressing foot (111) for upwardly pressing the sewed object on a pin plate (11); the lower end part of the pull rod (133) is provided with an external pressing foot (121); a vertical acting mechanism part (130) is used for providing driving force for vertically moving the middle pressing foot (111) and the external pressing foot (121) in an approximately reverse phase to the pressing rod (137) and the pull rod (133) through a plurality of links; a horizontal acting mechanism part (140) is used for providing the driving force for horizontal reciprocating motion to the pull rod (133) through a plurality of links; in the pull rod (133), a pull rod guide part (170) of which the end face is arranged adjacent to the pressing rod (137) is arranged; and in the pressing rod (137), a plate pressing part (160) for slidably supporting a plate rod (133) is arranged on the side reverse to the side of the pressing rod (137) in the plate rod (133).
Description
Technical field
The present invention relates to the last feed mechanism of Sewing machines.
Background technology
As prior art, known outer presser feet and the middle presser feet of making moves up and down mutually with roughly opposite position, alternately pushes down the sewn object on the needle plate, and makes outer presser feet and the coordination of feeding tooth and this sewn object is sent to the feed sewing machine up and down of cloth feeding direction.At this up and down in the feed sewing machine, for example, shown in patent documentation 1, have the outer presser feet of driving and middle presser feet and from the top near sewn object, simultaneously it is sent to the last feed mechanism of cloth feeding direction.
Fig. 1 is the stereogram of the Sewing machines with last feed mechanism of patent documentation 1.In addition, the state except cover (panel) 15c on the first end 15a of sewing machine arm portion 15 is unloaded in Sewing machines 1 expression of Fig. 1.On shown in Figure 1 in the feed mechanism 2, in the first end of Sewing machines arm 15, the plate stem 4 of feeding part 3 is by the knee-action transmission mechanism 5 and the horizontal balance transferring structure 7 of cloth feeding direction side that is arranged on the first end 15a of Sewing machines arm 15 on the bottom is connected with, and direction and cloth feeding direction shake up and down to make feeding part 3.
That is to say, 2 pairs of last feed mechanisms are gone up feeding part 3 and are transmitted the elliptic motion that comes and goes the resultant motion of action (X-direction action) and knee-action (Z-direction action) as cloth feeding direction, when the regional sewn object in the bottom of elliptic motion contacts with last feeding part 3, sewn object is sent to cloth feeding direction with the feeding tooth coordinations that in sewing machine base portion 13, occur.
Patent documentation
Patent documentation 1: the spy opens the 2006-75248 communique
But, on existing, in the feed mechanism 2, use to have with the knee-action transmission mechanism 5 and the horizontal transmission mechanism 7 of the axle parallel as a plurality of chain links (Link) at center with Y direction, carry out the knee-action and the horizontal balance of plate stem 4.
Thus, the pivot point (connecting portion) between each chain link in knee-action transmission mechanism 5 and the horizontal balance transmission mechanism 7, accumulation such as wave on the Y direction, might on plate stem 4, produce the waving of Y direction of Fig. 1.Because this influence, produce the problem of the premature wear of making fault or parts etc. of sewn object shakiness sometimes.
Therefore, as shown in Figure 2, considered following structure, i.e. configuration plate stem 4 in the frame of the first end 15a of Sewing machines arm 15, the following portion mounting rod presser feet 8 of the frame in the first end 15a of Sewing machines arm 15 is with adjacent with plate stem 4.In addition, presser feet (not shown) outside the lower end of plate stem 4 is provided with.In addition, closely dispose the pressure bar 9 that moves up and down with plate stem 4, and middle presser feet is set in the lower end of this pressure bar 9.
By this bar presser feet 8, realize preventing waving on the Y direction of Fig. 2 of plate stem 4.
But, the screw (with reference to the screw 8a of Fig. 2) of the cover 15c that is used to install feed mechanism 2 in the covering is installed on bar presser feet 8.Therefore, on the first end 15a of Sewing machines arm 15 during installation panel, according to the tight condition to the screw of screw 8a, bar presser feet 8 itself is crooked and to plate stem 4 parts contacts (partial contact), might cause preventing the function reduction of waving of plate stem 4.
Summary of the invention
The present invention proposes in view of the premises, and its purpose is, the last feed mechanism of the Sewing machines that waves of the plate stem that prevents to be equipped with outer presser feet is provided.
A structure that form adopted that goes up feed mechanism of the present invention comprises: pressure bar (137), its bottom have from above push down sewn object on the needle plate presser feet; Plate stem (133), its bottom have with described in the presser feet position adjacent from above push down the outer presser feet of described sewn object; Portion of knee-action mechanism (130) will make described middle presser feet offer described pressure bar and described plate stem with described outer presser feet with the driving force that roughly opposite position moves up and down mutually; And portion of horizontal balance mechanism (140), the driving force that level come and go is moved offers described plate stem, and wherein, the described feed mechanism of going up also comprises: guide member (170) is arranged on the described plate stem, and is configured to its tabular surface and described pressure bar is opposed; Guide surface (138a) engages with described guide member and supports described plate stem slidably; And limiting part (160), support by sewing machine frame, and support described plate stem slidably from a side opposite with described pressure bar.
According to the present invention, because prevent to be equipped with the waving of plate stem of outer presser feet, thus can improve sewing quality, and realize the long lifetime of sewing mechanism parts.
Description of drawings
Fig. 1 is the stereogram of the Sewing machines with last feed mechanism of patent documentation 1.
Fig. 2 is the stereogram of Sewing machines that has been suitable for the last feed mechanism of patent documentation 1.
Fig. 3 is the stereogram of the Sewing machines with last feed mechanism of one embodiment of the present invention.
Fig. 4 is a stereogram of observing the Sewing machines of present embodiment from the direction different with Fig. 3.
Fig. 5 is the part enlarged drawing of Sewing machines elder generation end that is used to illustrate the major part of feed mechanism.
Fig. 6 is the part enlarged drawing of Sewing machines elder generation end that is used to illustrate the major part of feed mechanism.
Fig. 7 is the part enlarged drawing of Sewing machines elder generation end that is used to illustrate the major part of feed mechanism.
Fig. 8 is the figure of the bottom of expression plate stem and pressure bar.
Description of reference numerals
10 Sewing machiness
11 needle plates
12 sewing machine frames
13 sewing machine base portions
15 Sewing machines arms
15a elder generation end
The 15b peristome
20 needle drive mechanisms
21 needle bars
Feed mechanism on 100
Pin in 111
121 outer pin
130 knee-action mechanisms
133L plate stem (plate stem)
137 pressure bars
140 horizontal balance mechanisms
160 pressing plate portions (limiting part)
162 splenium frames
163 screws
170 bar guide portion (guide member)
172 bolts (guide member)
174 nuts (guide member)
138 pressure bar retaining members
The 138a guide surface
The 160a main part
The 160b arm
The 162a face
The specific embodiment
Below, explain embodiments of the present invention with reference to accompanying drawing.
Fig. 3 is the stereogram of the Sewing machines with last feed mechanism of one embodiment of the present invention, and Fig. 4 is a stereogram of observing the Sewing machines of present embodiment from the direction different with Fig. 3.In addition, in Fig. 3 and Sewing machines shown in Figure 4, unload panel except the first end of sewing machine arm portion.
In the present embodiment, direction is made as Z-direction vertically, with the arm 15 of the Sewing machines under the state that is arranged on the horizontal plane 10 vertically be made as Y direction, will be parallel and be made as X-direction (being also referred to as cloth feeding direction) with the direction of Y direction quadrature with the plate face of needle plate 11.X-direction, Y direction and Z-direction are mutually orthogonal.In addition, last feed mechanism and following pay-off are all sent cloth along X-direction.
As shown in Figure 3, on a side of Sewing machines arm 15, be fixed with the fixed mount 150 of feed mechanism 100, be installed to Sewing machines so that go up feed mechanism 100.
The 15a side is formed with facial peristome 15b in the first end of Sewing machines arm 15 (being also referred to as face).With existing structure similarly, at facial peristome 15b not shown cover (being also referred to as panel) is installed.
Lower side at the first end 15a of Sewing machines arm 15 disposes needle bar 21.By being built in the needle bar mechanism 20 of Sewing machines arm 15, can coming and going along Z-direction and support needle bar 21 movably.
The inside of Sewing machines arm 15 not shown along the Y direction configuration on axle.Axle on the sewing machine frame rotatably support.Should go up rotatablely moving of axle and convey to needle bar 21 as swing movement via needle drive mechanism 20.Thus, needle bar 21 moves up and down, and the suture needle that the bottom kept of needle bar 21 is run through successively to the cloth on the needle plate 11.In addition, not shown known container mechanism is set below needle plate 11, make thus insert through the suture of suture needle with make from the bottom line tangle up of container mechanism.
In Sewing machines arm 15, dispose pressure bar 137.Can support pressure bar 137 up or down by being fixed on bearing sewing machine frame 12, not shown (being also referred to as the pressure bar metal).
The lower end of pressure bar 137 be provided with from above push down sewn object (being also referred to as cloth) on the needle plate presser feet 111.Closely dispose L plate stem (being also referred to as plate stem) 133 in Y direction side and pressure bar 137.Be provided with the outer presser feet 121 of pushing down the sewn object on the needle plate from the top in the lower end of L plate stem (plate stem) 133.The middle body of presser feet 121 is formed with notch outside, and middle presser feet 111 moves up and down in notch.
By bar presser feet 16, pressing plate portion (being also referred to as limiting part) 160, guide member 170, pressure bar retaining member guide surface (being also referred to as guide surface) 138a, support (guiding) L plate stem (plate stem) 133 slidably, so that on Y direction, do not wave.
Pressure bar retaining member guide surface 138a is from the side directed L plate stem 133 of pressure bar.Bar presser feet 16 and pressing plate portion 160 are from a side opposite with pressure bar 137 (being also referred to as back-pressure rod side) guiding L plate stem 133.Therefore, support L plate stem (plate stem) 133 slidably from the both sides of pressure bar side and back-pressure rod side.
The structure of pressing plate portion (being also referred to as limiting part) 160 at first, is described.
As shown in Figure 5 and Figure 6, observe from the side, pressing plate portion (limiting part) 160 is rectangular-shaped by bending, and is made of main part 160a and arm 160b.Main part 160a is installed to splenium frame 162 by screw 163 adjustable grounds.Splenium frame 162 is made of main part and support 162a.Hold the fixedly main part of splenium frame 162 tightly being fixed on the not shown bearing of sewing machine frame 12 (being also referred to as the pressure bar metal).Pressing plate portion (limiting part) 160 is fixed on sewing machine frame 12, and supports L plate stem 133 slidably from back-pressure rod side.
The support 162a of splenium frame 162 has the bearing-surface 162a parallel with Y direction.Via form at main part 160a, along the slotted hole (omitting diagram) that Y direction is extended, tighten the main part 160a of this bearing-surface 162a and pressing plate portion 160 by screw 163.
As mentioned above, by unscrewing screw 163, by the bearing-surface 162a of splenium frame 162 along Y direction (being also referred to as direction) freedom of movement twelve Earthly Branches pressure-bearing board 160 with the cloth feeding direction quadrature.Then, by tightening screw 163, be fixed on the assigned position that moves on the Y direction that limits L plate stem 133.Then, pressing plate portion 160 is going up freedom of movement along Y direction with the approaching direction (being also referred to as-Y direction) of L plate stem 133 or the direction (being also referred to as Y direction) of separating (separate).
In the lower end side of facial peristome 15b with tabular mounting rod presser feet 16.Bar presser feet 16 supports L plate stem (plate stem) 133 slidably.
On bar presser feet 16, be formed for the screw 16a of installation panel.Screw and screw 16a are being screwed togather and during at bar presser feet 16 installation panels, even according to the degree of tightening of screw and bar presser feet 16 itself when crooked, also,, crooked bar presser feet 16 contacts so can not dividing L plate stem 133 generating units by the position of pressing plate portion 160 restriction L plate stems 133.Then, the moving to bar presser feet 16 sides of pressing plate portion 160 restriction L plate stems 133.
In addition, in the present embodiment, the main part 160a side that has adopted in pressing plate portion 160 is formed for the slotting structure that wear, the upwardly extending slotted hole in Y side of screw, but the present invention is not limited to this.For example, also can be by on main part 160a, forming slotted hole, and screw inserted the main part 160a that wears this slotted hole and be fixedly connected on pressing plate portion 160, thus at the fixed-site main part 160a of the regulation of facial 162a.
Then, following structure is described,, supports (guiding) L plate stem (plate stem) 133 slidably, on Y direction so that it does not wave promptly by guide member 170 and pressure bar retaining member guide surface (being also referred to as guide surface) 138a.
As Fig. 5～shown in Figure 7, guide member (being also referred to as the plate stem guide member) 170 is formed on the L plate stem 133, and constitutes by inserting bolt 172 and the nut 174 of wearing the installing hole with screw division.The tabular surface of bolt head 172a is configured on the side of pressure bar side of L plate stem 133, and is fixed on bolt head 172 by nut 174 and has given prominence on the position of ormal weight along Y direction.
On pressure bar retaining member 138, form guide surface 138a along X-direction.The guide surface 138a of this pressure bar retaining member 138 engages with the tabular surface of bolt 172 heads that constitute guide member (plate stem guide member) 170, supports L plate stem (plate stem) 133 slidably.
As shown in Figure 7, on pressure bar retaining member 138, form the installation recess 138b recessed to guide surface 138a.Installing on the recess 138b, but by screw 191 fixing moving-wire guide portion 190.But under the state of fixing moving-wire guide portion 190, the head of screw 191 is accommodated in to be installed in the recess 138b, and the tabular surface with bolt 172 heads that constitute guide member (plate stem guide member) 170 does not engage.
Pay-off down is set in this sewing machine base portion 13, and described pay-off down has: following feeding tooth, come in and go out upward from the through hole that is arranged on slit-shaped on the needle plate 11, not shown; Following feeding knee-action mechanism gives round action along Z-direction to feeding tooth down; And following feeding horizontal balance mechanism, give round action to feeding tooth down along X-direction.With the round action along all directions of following feeding knee-action mechanism and following feeding horizontal balance mechanism, all, it is carried out along the elliptic motion on X-Z plane to give this time feeding tooth with the identical cycle that moves up and down of the suture needle of the top of needle plate 11.Following feeding tooth occurs upward and contacts from the below with cloth from the slit of needle plate, and send cloth (being also referred to as sewn object) along X-direction when the track on the top by elliptic motion.
Knee-action mechanism 130 comprises: slave arm 132, and the never illustrated beam warp of going up shakes driving force by last feeding lifting shaft 131 reception and registration; Pass on that chain link body 135, is distolateral to be connected with slave arm 132; 3 chain link bodies 134 are connected with the other end of passing on chain link body 135; Supporting chain section body 136,3 chain link bodies 134 of rotatably support; And pushing spring 139, always push outer presser feet 121 downwards via L plate stem 133.
3 chain link bodies 134 have three connecting portion 134a, 134b and 134c, be connected with passing on chain link body 135 by the first connecting portion 134a, by the upper end of the second connecting portion 134b rotatably support L plate stem 133, and the upper end by the 3rd connecting portion 134c rotatably support pressure bar 137.Configuration is by the supporting chain section body 136 of fixed mount 150 rotatably support base end parts below reception and registration chain link body 135.The end of shaking of supporting chain section body 136 is connected with the 3rd connecting portion 134c, and can joltily support 3 chain link bodies 134.In addition, presser feet 121 outside the bottom of L plate stem 133 is fixing, presser feet 111 in the bottom of pressure bar 137 is fixing.
In this knee-action mechanism 130, pass on chain link body 135,3 chain link bodies 134 and supporting chain section body 136 with the Sewing machines arm vertically, promptly parallel with Y direction axle is the center, rotate or shake freely to connect.That is to say that knee-action mechanism 130 adopts via being the center with the axle parallel with Y direction, rotates or shake the structure of a plurality of chain links that freely connect.
Knee-action mechanism 130 is by so a plurality of chain links, never the axle of going up in the illustrated Sewing machines arm obtains to shake driving force, and shake 3 chain link bodies 134, its result, pressure bar 137 and L plate stem 133 are moved up and down with roughly opposite position with alternating, and, make outer presser feet 121 and suture needle synchronously and lifting via L plate stem 133.
The L plate stem 133 that moves up and down like this comes and goes on cloth feeding direction via horizontal balance mechanism 140 and moves.
Horizontal balance mechanism 140 comprises: slave arm 152, never illustrated feed spool are down passed on via last feed spool 141 and are shaken driving force; Lever part 143, by the fulcrum in the middle of fixed mount 150 rotatably supports, and the one end is connected with slave arm 142; And connecting link body 144, the other end of lever part 143 is connected with the bottom of L plate stem 133 is neighbouring.
A part that offers down the round rotatory force of feed spool is communicated to lever part 143, and conveys to via connecting link body 144 and keep the bottom conduct of L plate stem 133 of outer presser feet 121 along the round driving force of X-direction.
Like this, in horizontal balance mechanism 140, slave arm 142, lever part 143, L plate stem 133 and connecting link body 144 with the Sewing machines arm vertically, promptly parallel with Y direction axle is the center, rotate or shake freely to connect.That is to say that horizontal balance mechanism 140 adopts via being the center with the axle parallel with the Y direction, rotates the structure of a plurality of chain links that freely connect.
According to these a plurality of chain links, synchronously the round driving force of above-below direction is offered outer presser feet 121 by knee-action mechanism 130 with the Sewing machines driving, and, synchronously the round driving force of X-direction is offered outer presser feet 121 via not shown following feed spool and Sewing machines driving by horizontal balance mechanism 140.
Then, will come and go the elliptic motion of action and the round composition campaign of Z-direction, convey to the outer presser feet 121 that L plate stem 133 is kept based on X-direction.Then, in the zone of the bottom of elliptic motion, cloth contacts with outer presser feet 121, and sends cloth along X-direction.
Thus, in the machine frame 12 of the first end of Sewing machines arm 15, pressure bar 137 synchronously moves up and down with needle bar 21.In addition, L plate stem 133 and pressure bar 137 move up and down mutually with roughly opposite position, and move on cloth feeding direction and carry out elliptic motion.
According to present embodiment, carry out elliptic motion, promptly move up and down and the L plate stem 133 of the resultant motion of moving on cloth feeding direction by knee-action mechanism 130 and horizontal balance mechanism 140, by mobile on approaching direction of Y direction and pressure bar and the direction of separating of pressing plate portion 160 and 170 restrictions of plate stem guide portion.That is to say that as shown in Figure 8, the outer presser feet 121 that the bottom kept of L plate stem 133 is limited moving on the A direction.
That is to say that there is not the skew on the A direction in the middle presser feet 111 of the lower end of 121 pairs of pressure bars 137 of outer presser feet, can realize the stability of making.
In addition, owing to wave minimizing,, can realize improving as last feed mechanism or have the reliability of the feed sewing machine up and down of this mechanism so can prevent the inordinate wear of each part.
In addition, the present invention is not limited to above-mentioned embodiment, can carry out various changes.For example, the knee-action mechanism 130 of feed mechanism 100 and horizontal balance mechanism 140 releasably are fixed on the side of Sewing machines arm 15 on the formation.Can also easily consider knee-action mechanism 130 and horizontal balance mechanism 140 are configured in the Sewing machines arm 15, to replace it.In addition, horizontal balance mechanism 40 is driven by following feed spool, but also can easily consider to replace it by being driven by last shaft-driven input and output shaft.
The invention described above only otherwise break away from spirit of the present invention just can carry out various changes, and to the present invention relates to this scope that has changed be self-evident.
Industrial applicibility
The feed mechanism of going up of the present invention has by what it is loaded into feed sewing machine up and down prevents plate stem and waves, prevents shaking or the effect of the premature wear of parts of sewn object, to being applicable to that the mechanism of feed sewing machine is extremely useful up and down.
Claims (3)
1. the last feed mechanism of a Sewing machines comprises:
Pressure bar, its bottom have from above push down sewn object on the needle plate presser feet;
Plate stem, its bottom have with described in the presser feet position adjacent from above push down the outer presser feet of described sewn object;
Portion of knee-action mechanism will make described middle presser feet offer described pressure bar and described plate stem with described outer presser feet with the driving force that roughly opposite position moves up and down mutually; And
Portion of horizontal balance mechanism comes and goes the driving force that moves with level and offers described plate stem, wherein,
The described feed mechanism of going up also comprises:
Guide member is arranged on the described plate stem, and is configured to its tabular surface and described pressure bar is opposed;
Guide surface engages with described guide member and supports described plate stem slidably; And
Limiting part is supported by sewing machine frame, and supports described plate stem slidably from a side opposite with described pressure bar.
2. the last feed mechanism of Sewing machines as claimed in claim 1, wherein,
Described guide member is made of the screw bolt and nut that advance and retreat are mounted freely on the described plate stem, and,
Described guide surface is formed on the pressure bar retaining member that is used to keep described pressure bar.
3. the last feed mechanism of Sewing machines as claimed in claim 2 wherein, comprising:
The splenium frame is by described sewing machine frame supporting; And
Bearing-surface, with the direction of cloth feeding direction quadrature, be formed on the described splenium frame,
Described limiting part is supported to can contact or leave described plate stem by described bearing-surface, and is fixed on assigned position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010211017.3A CN102296430B (en) | 2010-06-28 | 2010-06-28 | Loading and feeding mechanism for sewing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010211017.3A CN102296430B (en) | 2010-06-28 | 2010-06-28 | Loading and feeding mechanism for sewing machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102296430A true CN102296430A (en) | 2011-12-28 |
| CN102296430B CN102296430B (en) | 2014-11-05 |
Family
ID=45357095
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010211017.3A Active CN102296430B (en) | 2010-06-28 | 2010-06-28 | Loading and feeding mechanism for sewing machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102296430B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104652045A (en) * | 2015-02-09 | 2015-05-27 | 浙江乐江机械有限公司 | Sewing machine |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02172492A (en) * | 1988-12-26 | 1990-07-04 | Mitsubishi Electric Corp | Walking bar mechanism for sewing machine |
| CN1746364A (en) * | 2004-09-07 | 2006-03-15 | 重机公司 | Upper cloth feeding device of sewing machine |
| CN2892914Y (en) * | 2006-04-17 | 2007-04-25 | 标准缝纫机菀坪机械有限公司 | Needle bar swinging device of sewing machine |
| CN101469487A (en) * | 2007-12-28 | 2009-07-01 | Juki株式会社 | Upper feeding device of sewing machine |
-
2010
- 2010-06-28 CN CN201010211017.3A patent/CN102296430B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02172492A (en) * | 1988-12-26 | 1990-07-04 | Mitsubishi Electric Corp | Walking bar mechanism for sewing machine |
| CN1746364A (en) * | 2004-09-07 | 2006-03-15 | 重机公司 | Upper cloth feeding device of sewing machine |
| CN2892914Y (en) * | 2006-04-17 | 2007-04-25 | 标准缝纫机菀坪机械有限公司 | Needle bar swinging device of sewing machine |
| CN101469487A (en) * | 2007-12-28 | 2009-07-01 | Juki株式会社 | Upper feeding device of sewing machine |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104652045A (en) * | 2015-02-09 | 2015-05-27 | 浙江乐江机械有限公司 | Sewing machine |
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| CN102296430B (en) | 2014-11-05 |
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