CN204644612U - A kind of height adjusting mechanism of presser foot of Sewing machines - Google Patents
A kind of height adjusting mechanism of presser foot of Sewing machines Download PDFInfo
- Publication number
- CN204644612U CN204644612U CN201520262568.0U CN201520262568U CN204644612U CN 204644612 U CN204644612 U CN 204644612U CN 201520262568 U CN201520262568 U CN 201520262568U CN 204644612 U CN204644612 U CN 204644612U
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- interval
- connecting rod
- sewing machines
- lifting arm
- adjusting mechanism
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Abstract
The utility model provides a kind of height adjusting mechanism of presser foot of Sewing machines, belongs to sewing mechanism technology for making field.The presser feet height it solving existing Sewing machines regulates troublesome problem.The height adjusting mechanism of presser foot of this Sewing machines, Sewing machines comprises head and cylinder, cylinder is fixed in head, the outer end of cylinder piston rod and the top of lift lever are hinged, the bottom of lift lever is connected with presser feet with compressor arm by promoting connecting rod, intermittently lifting arm, connecting plate, governor motion comprises needle gage bidding quotation and regulating shaft, needle gage bidding quotation is positioned on the lateral wall of head, needle gage bidding quotation is connected with the middle and lower part of lift lever by regulating shaft, described lift lever rotates around regulating shaft, presser feet can be driven by rotary needle to move up and down apart from bidding quotation.The height adjusting mechanism of presser foot of this Sewing machines has the advantage making presser feet height easy to adjust.
Description
Technical field
The utility model belongs to sewing mechanism technology for making field, relates to a kind of presser feet of Sewing machines, particularly a kind of height adjusting mechanism of presser foot of Sewing machines.
Background technology
Industrial sewing machine is in operation use procedure, and the difference due to sewing needs to regulate the height of presser feet, is the thickness that the height of presser feet is applicable to sewing.
Existing Sewing machines and presser foot lifting device thereof, such as Chinese patent literature data discloses a kind of sewing machine frame and presser foot lifting device for sewing machine [number of patent application: 201410080457.8 thereof; Application publication number: CN103981651A], it comprises frame body, and frame body is divided into crossbeam and vertical beam, and crossbeam and vertical beam inside are hollow structure, near presser foot component end, one end of crossbeam is provided with groove.
The Sewing machines of this kind of structure, when regulating the height of presser foot lifter, needs to pull down trim and presser feet hold-down screw regulates, troublesome poeration.
Summary of the invention
The purpose of this utility model is for the above-mentioned problems in the prior art, proposes a kind of height adjusting mechanism of presser foot of Sewing machines, solves the height adjustment operation how making presser feet convenient.
The purpose of this utility model realizes by following technical proposal: a kind of height adjusting mechanism of presser foot of Sewing machines, Sewing machines comprises head and cylinder, described cylinder is fixed in head, the outer end of described cylinder piston rod and the top of lift lever are hinged, the bottom of described lift lever is by promoting connecting rod, interval lifting arm, connecting plate is connected with presser feet with compressor arm, it is characterized in that, described governor motion comprises needle gage bidding quotation and regulating shaft, described needle gage bidding quotation is positioned on the lateral wall of head, described needle gage bidding quotation is connected with the middle and lower part of lift lever by regulating shaft, described lift lever rotates around regulating shaft, presser feet can be driven by rotary needle to move up and down apart from bidding quotation.
Sewing machines operationally, need the height according to the different adjustment presser feet of sewing, this governor motion only needs by rotary needle apart from bidding quotation, rotary needle drives lift lever to rotate around regulating shaft apart from bidding quotation by regulating shaft, changes the position promoting connecting rod, interval lifting arm, connecting plate and compressor arm, thus changes the position of presser feet, the height of presser feet is made to be applicable to different sewings, easy to adjust, easy to operate, needle gage bidding quotation can be locked after having regulated; The difference in height of sewing is often less, presser feet height needs the scope of adjustment less, namely need the angle of rotation less bottom lift lever, because regulating shaft is connected with the middle and lower part of lift lever, rotary needle is less apart from the angle change bottom lift lever during bidding quotation, degree of regulation is high, can put in place by Primary regulation, easy to adjust.
In the height adjusting mechanism of presser foot of above-mentioned a kind of Sewing machines, lifting arm axle is fixed with in described head, the bottom of described interval lifting arm is enclosed within outside lifting arm axle, the rear end of described interval lifting arm is connected with lifting connecting rod, the front end of described interval lifting arm is resisted against the bottom of connecting plate, and bottom the rear end of interval lifting arm to interval lifting arm between the distance front end that is less than interval lifting arm bottom intermittently lifting arm between distance.By interval lifting arm, transmission is moved up and down from moving left and right to become, and interval lifting arm use lever principle, makes the transmission degree of regulation of presser feet higher.
In the height adjusting mechanism of presser foot of above-mentioned a kind of Sewing machines, the front end of described interval lifting arm has roller, and described roller is resisted against the bottom of connecting plate.Roller makes the connection between interval lifting arm and connecting plate become to roll and connects, interval lifting arm make connecting plate upward or rotate down time, roller improves precision during interval lifting arm drive connecting plate rotation, thus improves the degree of regulation of this governor motion.
In the height adjusting mechanism of presser foot of above-mentioned a kind of Sewing machines, the bottom of described connecting plate has arc abutment face, and described roller is resisted against on arc abutment face.When connecting plate rotates, the position between roller and connecting plate offsets along the axis of roller, and arc abutment face and roller match, and moves smooth and easy when roller is offset, and improves the degree of regulation of this governor motion.
In the height adjusting mechanism of presser foot of above-mentioned a kind of Sewing machines, interval connecting rod one, interval connecting rod two and transiting rod is provided with between described connecting plate and compressor arm, described connecting plate is axially fixed in head, middle part and the connecting plate of described interval connecting rod one are hinged, one end of described interval connecting rod one is hinged with the top of interval connecting rod two, the bottom of described interval connecting rod two is connected mutually with compressor arm, the described other end of interval connecting rod one and one end of transiting rod are hinged, and the other end and the head of described transiting rod are hinged.Interval lifting arm can drive connecting plate to rotate in a circumferential direction, make the change in location of connecting plate better, more accurately can pass to compressor arm by interval connecting rod one, interval connecting rod two and transiting rod, thus improve this governor motion regulates presser feet height precision by needle gage bidding quotation.
In the height adjusting mechanism of presser foot of above-mentioned a kind of Sewing machines, described connecting plate place has cavity, and a described interval connecting rod part is arranged in cavity, and the hinged place of described interval connecting rod one and interval connecting rod two is arranged in cavity.This kind of structure, makes connecting plate and interval connecting rod one occupy less space, and make transiting rod compact with the location comparison of connecting plate, interval connecting rod one with interval connecting rod two, the space occupied is little, Appropriate application space.
In the height adjusting mechanism of presser foot of above-mentioned a kind of Sewing machines, described interval connecting rod two-way is crossed pressed joint and is connected mutually with compressor arm, described pressed joint comprises guide part, the madial wall of described head has the gathering sill vertically arranged, and described guide part is embedded in gathering sill.The existence of guide part ensures that compressor arm moves along the direction of setting, improves the mobile accuracy of compressor arm, thus improves the degree of regulation of presser feet.
In the height adjusting mechanism of presser foot of above-mentioned a kind of Sewing machines, anchor tip one and slip joint is provided with between described lifting connecting rod and lift lever, the described rear end of anchor tip one and the bottom of lift lever are hinged, the front end of described anchor tip one has connection blind hole one, described slip joint comprises the insertion section of rear end and the connecting portion of front end, have in described connecting portion and connect blind hole two, described insertion section is arranged in and connects blind hole one, the rear end of described lifting connecting rod is arranged in and connects blind hole two, and the both sides of described connecting portion have all been threaded adjusting nut.By regulating the position of adjusting nut, change insertion section insertion to connect blind hole one degree of depth, change the degree of depth that lifting rod rear end inserts connection blind hole two, thus the position promoting connecting rod is finely tuned, adjusting nut regulates the initial position of presser feet, improves the precision of this governor motion.
In the height adjusting mechanism of presser foot of above-mentioned a kind of Sewing machines, anchor tip two is provided with between described lifting connecting rod and interval lifting arm, the front end of described anchor tip two is hinged with the rear end of interval lifting arm, the rear end of described anchor tip two has connection blind hole three, the front end of described lifting connecting rod is arranged in and connects blind hole three, on described lifting connecting rod, cover has adjusting nut, and adjusting nut is resisted against the rear end of anchor tip two.By regulating adjusting nut, change the front end promoting connecting rod and be inserted into the degree of depth connected in blind hole three, thus finely tune the position of interval lifting arm, connecting plate, adjusting nut regulates the initial position of presser feet, improves the precision of this governor motion.
Compared with prior art, a kind of height adjusting mechanism of presser foot of Sewing machines that the utility model provides has the following advantages:
1, the presser feet height of this Sewing machines regulates the height only needing just to be regulated presser feet apart from bidding quotation by rotary needle, easy to operate, makes the presser feet of this Sewing machines can push down the sewing of various different-thickness accurately.
2, the presser feet height of this Sewing machines regulates and employs multiple transmission mechanism, utilizes lever principle to improve the degree of regulation of presser feet, and Appropriate application space.
3, the presser feet height of this Sewing machines regulates and regulate by adjusting nut the initial position promoting connecting rod, interval lifting arm and connecting plate etc. when initial, adjustable range when later stage needle gage bidding quotation regulates according to different sewing on suitable height, thus is reduced in position when making presser feet initial.
Accompanying drawing explanation
Fig. 1 is the overall structure schematic diagram of this sewing-machine foot height adjustment mechanism.
Fig. 2 is the partial structurtes schematic diagram one of this Sewing machines.
Fig. 3 is the partial structurtes schematic diagram two of this Sewing machines.
Fig. 4 is the partial structurtes schematic diagram one of this sewing-machine foot height adjustment mechanism.
Fig. 5 is the partial structurtes schematic diagram two of this sewing-machine foot height adjustment mechanism.
Fig. 6 is the syndeton schematic diagram that this sewing-machine foot height adjustment mechanism promotes connecting rod.
In figure, 1, head; 101, gathering sill; 2, cylinder; 201, piston rod; 3, needle gage bidding quotation; 4, regulating shaft; 5, lift lever; 6, connecting rod is promoted; 7, interval lifting arm; 8, lifting arm axle; 9, connecting plate; 10, compressor arm; 11, interval connecting rod one; 12, interval connecting rod two; 13, transiting rod; 14, roller; 15, arc abutment face; 16, cavity; 17, pressed joint; 171, guide part; 18, anchor tip one; 19, slip joint; 191, insertion section; 192, connecting portion; 20, blind hole one is connected; 21, blind hole two is connected; 22, adjusting nut; 23, anchor tip two; 24, blind hole three is connected; 25, presser feet.
Detailed description of the invention
Be below specific embodiment of the utility model and by reference to the accompanying drawings, the technical solution of the utility model is further described, but the utility model be not limited to these embodiments.
As shown in Figure 2,3, Sewing machines comprises head 1, cylinder 2 and height adjusting mechanism of presser foot, and cylinder 2 is fixed in head 1, and height adjusting mechanism of presser foot is positioned on head 1.
As shown in Figure 1, governor motion comprises needle gage bidding quotation 3 and regulating shaft 4.As shown in Figure 1 and Figure 2, needle gage bidding quotation 3 is positioned on the lateral wall of head 1, the top of lift lever 5 and the outer end of cylinder 2 piston rod 201 are hinged, needle gage bidding quotation 3 is connected with lift lever 5 by regulating shaft 4, in the present embodiment, regulating shaft 4 is positioned at the middle and lower part of lift lever 5 with the tie point of lift lever 5.
The bottom of lift lever 5 is connected with the rear end of interval lifting arm 7 by promoting connecting rod 6, as shown in Figure 6, promote between connecting rod 6 and lift lever 5 and be provided with anchor tip 1 and slip joint 19, the rear end of anchor tip 1 and the bottom of lift lever 5 are hinged, the front end of anchor tip 1 has connection blind hole 1, slip joint 19 comprises the insertion section 191 of rear end and the connecting portion 192 of front end, have in connecting portion 192 and connect blind hole 2 21, insertion section 191 is arranged in and connects blind hole 1, the rear end promoting connecting rod 6 is arranged in and connects blind hole 2 21, the both sides of connecting portion 192 have all been threaded adjusting nut 22, two adjusting nuts 22 respectively with insertion section 191, the rear end screw thread promoting connecting rod 6 is connected, and adjusting nut 22 is resisted against the front end of anchor tip 1, another adjusting nut 22 is resisted against on connecting portion 192, by the position regulating the position of adjusting nut 22 can change slip joint 19, thus change the position promoting connecting rod 6, promote between connecting rod 6 and interval lifting arm 7 and be provided with anchor tip 2 23, the front end of anchor tip 2 23 is hinged with the rear end of interval lifting arm 7, the rear end of anchor tip 2 23 has connection blind hole 3 24, the front end promoting connecting rod 6 is arranged in and connects blind hole 3 24, lifting connecting rod 6 has been threaded adjusting nut 22, adjusting nut 22 is resisted against the rear end of anchor tip 2 23, by the initial position regulating adjusting nut 22 to change interval lifting arm 7.The structure of anchor tip 1 and anchor tip 2 23 is for being symmetrical set.
As shown in Figure 4, Figure 5, the rear end of interval lifting arm 7 bottom interval lifting arm 7 between the distance front end that is less than interval lifting arm 7 bottom intermittently lifting arm 7 between distance, the bottom of interval lifting arm 7 is enclosed within outside lifting arm axle 8, lifting arm axle 8 is connected in head 1, namely interval lifting arm 7 can rotate around lifting arm axle 8, the front end of interval lifting arm 7 has roller 14, and the bottom of connecting plate 9 has arc abutment face 15, and roller 14 is resisted against on arc abutment face 15.Connecting plate 9 is axially fixed in head 1, middle part and the connecting plate 9 of interval connecting rod 1 are hinged, one end of interval connecting rod 1 is hinged with the top of interval connecting rod 2 12, the interval other end of connecting rod 1 and one end of transiting rod 13 are hinged, the other end and the quarter butt of transiting rod 13 are hinged, and quarter butt is connected mutually with head 1.The bottom of interval connecting rod 2 12 is connected mutually by pressed joint 17 and compressor arm 10, the bottom of compressor arm 10 is fixed with presser feet 25, pressed joint 17 comprises guide part 171, and the madial wall of head 1 has the gathering sill 101 vertically arranged, guide part 171 is embedded in gathering sill 101.Connecting plate 9 place has cavity 16, and interval connecting rod 1 part is arranged in cavity 16, and the hinged place of interval connecting rod 1 and interval connecting rod 2 12 is also arranged in cavity 16, Appropriate application space.
During initial installation, by regulating adjusting nut 22, changing the initial position promoting connecting rod 6, interval lifting arm 7 and connecting plate 9 etc., making the presser feet 25 be positioned at bottom compressor arm 10 can be applicable to the sewing of general thickness.When sewing difference needs the height regulating presser feet 25, only need rotary needle apart from bidding quotation 3, lift lever 5 is driven to rotate around regulating shaft 4 by rotary needle apart from bidding quotation 3, change the position promoting connecting rod 6, interval lifting arm 7, connecting plate 9, thus the position of presser feet 25 is changed by interval connecting rod 1, interval connecting rod 2 12, transiting rod 13 and compressor arm 10, the height of presser feet 25 is made to be applicable to sewing, easy to adjust.
Specific embodiment described herein is only to the explanation for example of the utility model spirit.The utility model person of ordinary skill in the field can make various amendment or supplements or adopt similar mode to substitute to described specific embodiment, but can't depart from spirit of the present utility model or surmount the scope that appended claims defines.
Although more employ head 1 herein, gathering sill 101, cylinder 2, piston rod 201, needle gage bidding quotation 3, regulating shaft 4, lift lever 5, promote connecting rod 6, interval lifting arm 7, lifting arm axle 8, connecting plate 9, compressor arm 10, interval connecting rod 1, interval connecting rod 2 12, transiting rod 13, roller 14, arc abutment face 15, cavity 16, pressed joint 17, guide part 171, anchor tip 1, slip joint 19, insertion section 191, connecting portion 192, connect blind hole 1, connect blind hole 2 21, adjusting nut 22, anchor tip 2 23, connect blind hole 3 24, term such as presser feet 25 grade, but do not get rid of the possibility using other term.These terms are used to be only used to describe and explain essence of the present utility model more easily; The restriction that they are construed to any one additional is all contrary with the utility model spirit.
Claims (9)
1. the height adjusting mechanism of presser foot of a Sewing machines, Sewing machines comprises head (1) and cylinder (2), described cylinder (2) is fixed in head (1), the outer end of described cylinder (2) piston rod (201) and the top of lift lever (5) are hinged, the bottom of described lift lever (5) is by promoting connecting rod (6), interval lifting arm (7), connecting plate (9) is connected with presser feet (25) with compressor arm (10), it is characterized in that, described governor motion comprises needle gage bidding quotation (3) and regulating shaft (4), described needle gage bidding quotation (3) is positioned on the lateral wall of head (1), described needle gage bidding quotation (3) is connected by the middle and lower part of regulating shaft (4) with lift lever (5), described lift lever (5) rotates around regulating shaft (4), presser feet (25) can be driven by rotary needle to move up and down apart from bidding quotation (3).
2. the height adjusting mechanism of presser foot of a kind of Sewing machines according to claim 1, it is characterized in that, lifting arm axle (8) is fixed with in described head (1), the bottom of described interval lifting arm (7) is enclosed within lifting arm axle (8) outward, the rear end of described interval lifting arm (7) is connected with lifting connecting rod (6), the front end of described interval lifting arm (7) is resisted against the bottom of connecting plate (9), and the distance between the rear end of interval lifting arm (7) to interval lifting arm (7) bottom is less than the front end of interval lifting arm (7) to the distance intermittently between lifting arm (7) bottom.
3. the height adjusting mechanism of presser foot of a kind of Sewing machines according to claim 2, it is characterized in that, the front end of described interval lifting arm (7) has roller (14), and described roller (14) is resisted against the bottom of connecting plate (9).
4. the height adjusting mechanism of presser foot of a kind of Sewing machines according to claim 3, it is characterized in that, the bottom of described connecting plate (9) has arc abutment face (15), and described roller (14) is resisted against on arc abutment face (15).
5. the height adjusting mechanism of presser foot of a kind of Sewing machines according to claim 1 or 2 or 3 or 4, it is characterized in that, interval connecting rod one (11) is provided with between described connecting plate (9) and compressor arm (10), interval connecting rod two (12) and transiting rod (13), described connecting plate (9) is axially fixed in head (1), middle part and the connecting plate (9) of described interval connecting rod one (11) are hinged, one end of described interval connecting rod one (11) is hinged with the top of interval connecting rod two (12), the bottom of described interval connecting rod two (12) is connected mutually with compressor arm (10), the other end of described interval connecting rod one (11) and one end of transiting rod (13) are hinged, the other end and the head (1) of described transiting rod (13) are hinged.
6. the height adjusting mechanism of presser foot of a kind of Sewing machines according to claim 5, it is characterized in that, described connecting plate (9) place has cavity (16), described interval connecting rod one (11) part is arranged in cavity (16), and the hinged place of described interval connecting rod one (11) and interval connecting rod two (12) is arranged in cavity (16).
7. the height adjusting mechanism of presser foot of a kind of Sewing machines according to claim 6, it is characterized in that, described interval connecting rod two (12) is connected mutually by pressed joint (17) and compressor arm (10), described pressed joint (17) comprises guide part (171), the madial wall of described head (1) has the gathering sill (101) vertically arranged, described guide part (171) is embedded in gathering sill (101).
8. the height adjusting mechanism of presser foot of a kind of Sewing machines according to claim 1 or 2 or 3 or 4, it is characterized in that, anchor tip one (18) and slip joint (19) is provided with between described lifting connecting rod (6) and lift lever (5), the rear end of described anchor tip one (18) and the bottom of lift lever (5) are hinged, the front end of described anchor tip one (18) has connection blind hole one (20), described slip joint (19) comprises the insertion section (191) of rear end and the connecting portion (192) of front end, have in described connecting portion (192) and connect blind hole two (21), described insertion section (191) is arranged in and connects blind hole one (20), the rear end of described lifting connecting rod (6) is arranged in and connects blind hole two (21), the both sides of described connecting portion (192) have all been threaded adjusting nut (22).
9. the height adjusting mechanism of presser foot of a kind of Sewing machines according to claim 8, it is characterized in that, anchor tip two (23) is provided with between described lifting connecting rod (6) and interval lifting arm (7), the front end of described anchor tip two (23) is hinged with the rear end of interval lifting arm (7), the rear end of described anchor tip two (23) has connection blind hole three (24), the front end of described lifting connecting rod (6) is arranged in and connects blind hole three (24), the upper cover of described lifting connecting rod (6) has adjusting nut (22), and adjusting nut (22) is resisted against the rear end of anchor tip two (23).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520262568.0U CN204644612U (en) | 2015-04-27 | 2015-04-27 | A kind of height adjusting mechanism of presser foot of Sewing machines |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520262568.0U CN204644612U (en) | 2015-04-27 | 2015-04-27 | A kind of height adjusting mechanism of presser foot of Sewing machines |
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| Publication Number | Publication Date |
|---|---|
| CN204644612U true CN204644612U (en) | 2015-09-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520262568.0U Withdrawn - After Issue CN204644612U (en) | 2015-04-27 | 2015-04-27 | A kind of height adjusting mechanism of presser foot of Sewing machines |
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| CN (1) | CN204644612U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104762762A (en) * | 2015-04-27 | 2015-07-08 | 新通宇缝纫机股份有限公司 | Presser foot height adjusting mechanism for sewing machine |
| CN106192229A (en) * | 2016-09-26 | 2016-12-07 | 浙江中捷缝纫科技有限公司 | A kind of regulation presser feet height devices of sewing machine |
| CN106757827A (en) * | 2016-12-23 | 2017-05-31 | 拓卡奔马机电科技有限公司 | Template machine presser foot device |
| CN107354600A (en) * | 2016-05-10 | 2017-11-17 | 天津宝盈电脑机械有限公司 | A kind of Novel sewing head |
| CN112048838A (en) * | 2019-06-05 | 2020-12-08 | 杰克缝纫机股份有限公司 | Sewing machine |
-
2015
- 2015-04-27 CN CN201520262568.0U patent/CN204644612U/en not_active Withdrawn - After Issue
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104762762A (en) * | 2015-04-27 | 2015-07-08 | 新通宇缝纫机股份有限公司 | Presser foot height adjusting mechanism for sewing machine |
| CN104762762B (en) * | 2015-04-27 | 2017-10-13 | 台州通宇服装机械科技有限公司 | A kind of height adjusting mechanism of presser foot of sewing machine |
| CN107354600A (en) * | 2016-05-10 | 2017-11-17 | 天津宝盈电脑机械有限公司 | A kind of Novel sewing head |
| CN106192229A (en) * | 2016-09-26 | 2016-12-07 | 浙江中捷缝纫科技有限公司 | A kind of regulation presser feet height devices of sewing machine |
| CN106192229B (en) * | 2016-09-26 | 2022-06-28 | 浙江中捷缝纫科技有限公司 | Presser foot height adjusting device of sewing machine |
| CN106757827A (en) * | 2016-12-23 | 2017-05-31 | 拓卡奔马机电科技有限公司 | Template machine presser foot device |
| CN112048838A (en) * | 2019-06-05 | 2020-12-08 | 杰克缝纫机股份有限公司 | Sewing machine |
| CN112048838B (en) * | 2019-06-05 | 2022-02-22 | 杰克科技股份有限公司 | Sewing machine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20170203 Address after: 318000 Zhejiang Province, Jiaojiang District, a South Road, No. 3199, room 7, building 401 Patentee after: NEW TOYOU SEWING MACHINE CO., LTD. Address before: Binhai Industrial Park, Jiaojiang District, Taizhou City, Zhejiang province 318000 Haichang Road No. 1828 Patentee before: New Tongyu Sewing Machine Co., Ltd |
|
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20150916 Effective date of abandoning: 20171013 |