CN208183245U - A kind of pressure regulating mechanism of lifting pressre of sewing machine - Google Patents
A kind of pressure regulating mechanism of lifting pressre of sewing machine Download PDFInfo
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- CN208183245U CN208183245U CN201820497386.5U CN201820497386U CN208183245U CN 208183245 U CN208183245 U CN 208183245U CN 201820497386 U CN201820497386 U CN 201820497386U CN 208183245 U CN208183245 U CN 208183245U
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- pressing plate
- pressure regulating
- regulating mechanism
- sewing machine
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- 238000009958 sewing Methods 0.000 title claims abstract description 40
- 230000007246 mechanism Effects 0.000 title claims abstract description 36
- 230000001105 regulatory effect Effects 0.000 title claims abstract description 36
- 230000009471 action Effects 0.000 claims abstract description 6
- 229920003023 plastic Polymers 0.000 claims description 5
- 239000004033 plastic Substances 0.000 claims description 5
- 230000006835 compression Effects 0.000 claims description 2
- 238000007906 compression Methods 0.000 claims description 2
- 239000002184 metal Substances 0.000 claims description 2
- 210000000569 greater omentum Anatomy 0.000 claims 1
- 230000002093 peripheral effect Effects 0.000 claims 1
- 230000007423 decrease Effects 0.000 description 11
- 239000004744 fabric Substances 0.000 description 11
- 239000000463 material Substances 0.000 description 6
- 230000001771 impaired effect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000007792 addition Methods 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 210000003127 knee Anatomy 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
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- Sewing Machines And Sewing (AREA)
Abstract
The utility model provides a kind of pressure regulating mechanism of lifting pressre of sewing machine, belongs to technical field of sewing machines.It solves the problems, such as that the pressure regulating mechanism of existing lifting pressre of sewing machine easily leads to motor overload.The pressure regulating mechanism of this lifting pressre of sewing machine, including motor, the screw rod being driven by motor, helical spring and pressing plate for being pressed on presser foot lifter upper end, it is bolted with nut on screw rod and nut is driven by screw rod and gone up and down, pressing plate is located at the lower section of nut, nut is circumferentially not fixed, and helical spring is between nut and pressing plate, and the upper end of helical spring is pressed on nut, lower end is pressed on pressing plate, and helical spring is in compressive state under the action of nut and pressing plate.The pressure regulating mechanism of this lifting pressre of sewing machine can prevent motor overload from damaging.
Description
Technical field
The utility model belongs to technical field of sewing machines, is related to a kind of pressure regulating mechanism of lifting pressre of sewing machine.
Background technique
It can be provided with presser foot lifting device in the Handpiece Location of sewing machine, pass through presser foot lifter pressure during cloth sewing
Firmly, presser foot lifter is controlled on sewing machine lifting and put down mode has a multiplicity, including electronic, knee mentions, manually etc., and presser foot lifter is to cloth
Pressure be to be realized by spring, but be different that fabric thickness is different, and the cloth of different-thickness causes lift to be pressed
The height different from of underfooting drop, this causes presser foot lifter to be different the pressure of different-thickness cloth, needs to be adjusted.
Include at present manually and electronic, and electronic to the adjusting of presser foot lifter pressure, is the pressure for changing spring by actuator
Contracting amount, and then adjustment spring is to the pressure of presser foot lifter, as patent document (application number: 99811360.3) discloses a kind of sewing machine
Operating device, the executive component including a linear motor as cloth material pressing device, be used to control cloth material pressing device
The drive rod for the cloth pressing force being applied on sewing piece is connect with cloth material pressing device, and wherein drive rod passes through at least one bullet
Property the small connecting element of quality connect with cloth material pressing device, and cloth material pressing device can be by linear motor in a lift
It rises and is moved between position and a down position, i.e., directly adjust the pressure of presser foot lifter by linear motor compressed spring.For another example
Presser foot lifting device disclosed in patent document (Japanese Laid-Open Patent Publication 4-348793), motor is mobile by gear band carry-over bar, and rack gear passes through band
Dynamic nut rotation, nut drive screw rod lifting, the lifting of screw rod can adjustment spring decrement, and then adjust the pressure of presser foot lifter
Power, and screw rod is driven with nut cooperation, it is necessarily required to a rotation, another movement, and for mobile component
It needs to carry out circumferentially positioned, prevents it from rotating with rotatable parts, as offered sliding slot on the screw rod in the patent, sliding block is inserted
It connects in sliding slot, to prevent screw rod from rotating, but two presser foot lifting device has a biggish defect, such as patent document
It (application number: will be difficult to when the drive rod of the linear motor in 99811360.3) compresses the spring into downwards limiting condition under continuing
Drop, linear motor will overload at this time, and the screw rod decline and compressed spring in patent document (Japanese Laid-Open Patent Publication 4-348793) are extremely
It is also difficult to decline when limiting condition, nut can be stuck at this time, leads to motor overload, is easy to burn linear motor.
Summary of the invention
The purpose of this utility model is the presence of the above problem in view of the prior art, proposes a kind of lifting pressre of sewing machine
Pressure regulating mechanism, for solving the problems, such as that motor easily overloads damage.
The purpose of this utility model can be realized by the following technical scheme: a kind of pressure adjusting machine of lifting pressre of sewing machine
Structure, including motor, the screw rod being driven by motor, helical spring and pressing plate for being pressed on presser foot lifter upper end, on the screw rod
It is bolted with nut and nut is driven by screw rod and gone up and down, the pressing plate is located at the lower section of nut, which is characterized in that the nut week
To being not fixed, the helical spring is between nut and pressing plate, and the upper end of helical spring is pressed on nut, and lower end compresses
On pressing plate, helical spring is in compressive state under the action of nut and pressing plate.
The pressure regulating mechanism is assembled in rear fender on sewing machine downwards against the upper end of presser foot lifter, so that helical spring
Be compressed between nut and pressing plate, pressing plate generates downward pressure to presser foot lifter, therefore between helical spring upper end and nut, under
Tensioning pressure is all had between end and pressing plate and between pressing plate and presser foot lifter, when motor drives screw mandrel rotation, nut is in spiral shell
It will receive circumferential stiction under the action of rotation spring, which can carry out circumferential limitation to nut, prevent spiral shell
Mother rotates together with screw rod, to realize the lifting of nut, carries out pressure adjusting to presser foot lifter, i.e. the application is not necessarily to such as existing skill
Sliding slot is used to carry out with the usual manner that sliding block cooperates to nut in art circumferentially fixed, but by circumferential stiction to nut
Circumferential constraint is carried out such as to occur helical spring when nut excessive descent and be compressed into limiting condition and cause nut that can not continue
When decline, due to nut be circumferentially it is unfixed, nut can overcome the circumferential stiction being subject to and opposed helical bullet
Spring rotation or nut are rotated with helical spring opposing platen or nut is with helical spring and the opposite presser foot lifter of pressing plate
Rotation, to avoid nut that from can not declining and make screw rod stuck, causes motor overload to damage.
In the pressure regulating mechanism of above-mentioned lifting pressre of sewing machine, the lower end of the helical spring is pressed on the upper of pressing plate
On side, and the lower end of helical spring is circumferentially not fixed with pressing plate.It is only to be pressed against to close between the lower end and pressing plate of helical spring
System, is not connected, so that nut and helical spring are not fixed in the circumferential, therefore when nut is difficult to decline can be with spiral shell
Rotation spring rotates together, and opposing platen skids, and avoids screw rod is stuck motor overload is caused to damage.
In the pressure regulating mechanism of above-mentioned lifting pressre of sewing machine, has on the pressing plate downside and be used for presser foot lifter
The inserting column that end cap is set has limited post on the pressing plate upper side, and the lower end of the helical spring is set on limited post.Pressure
It is only pressing relationship between plate and presser foot lifter upper end, is not connected, so that nut, helical spring and pressing plate is in the circumferential not
It is fixed, therefore when nut is difficult to decline can rotate together with helical spring and pressing plate, opposite presser foot lifter skids, and avoids silk
Bar is stuck to cause motor overload to damage, and wherein inserting column can make pressing plate keep stablizing, and the limited post on pressing plate can make not
Fixed helical spring lower end guarantees to stablize, and avoids going out after relatively rotating skidding between helical spring, pressing plate and presser foot lifter upper end
Now shift.
In the pressure regulating mechanism of above-mentioned lifting pressre of sewing machine, the upper end of the helical spring is fixed with metal gasket
Plate offers centre bore on the backing plate, and above-mentioned screw rod passes through the centre bore of backing plate, and the backing plate upper side compresses under the nut
On side.When backing plate and nut are circumferentially not fixed, nut is difficult to decline and can rotate relative to backing plate, to protect to motor
Shield.
In the pressure regulating mechanism of above-mentioned lifting pressre of sewing machine, the nut adopts made of plastic, nut downside
Face has columnar limiting section, which is threaded through in the centre bore of backing plate, and is equipped with and can prevent between limiting section and backing plate
Only nut is with respect to the position limiting structure that backing plate circumferentially rotates.Frictional force and noise between nut and screw rod made of plastics is smaller,
Cost is also lower, but the frictional force between nut and backing plate corresponding can also become smaller, therefore limiting section is arranged on nut, pass through
Position limiting structure makes limiting section circumferentially positioned with backing plate, to avoid the opposite pad of nut in the normal pressure adjustment process of presser foot lifter
Plate skids, and when nut is difficult to continue decline, and nut is circumferentially rotated by limiting section with backing plate and helical spring, to motor into
Row protection.
In the pressure regulating mechanism of above-mentioned lifting pressre of sewing machine, if the position limiting structure includes on centre bore hole wall
Stopper protrusion is done, several axially disposed limiting slots, several stopper protrusions difference are offered on the limiting section outer wall
It is connected in several limiting slots.The fit structure of stopper protrusion and limiting slot can make limiting section circumferentially positioned with backing plate, and real
Existing limiting section and backing plate it is mating so that assembly is simpler.
In the pressure regulating mechanism of above-mentioned lifting pressre of sewing machine, the sum of the limiting section and the length of limited post are greater than
Helical spring is compressed to length when limiting condition.When limiting section and limited post lean, nut is difficult to continue to decline and occur
Skidding is circumferentially rotated, helical spring is not fully compressed to limiting condition at this time, i.e. limiting section and limited post leans energy
It is enough that helical spring is protected, avoid helical spring impaired.
In the pressure regulating mechanism of above-mentioned lifting pressre of sewing machine, there is external screw thread on the motor shaft outer wall of the motor
And above-mentioned screw rod is formed, the screw hole of the nut is through to the lower end surface of limiting section.Screw rod directlys adopt motor shaft processing
It is formed, it is more stable, and nut has longer screw hole, so that the cooperation between nut and screw rod is more stable.
In the pressure regulating mechanism of above-mentioned lifting pressre of sewing machine, the pressure regulating mechanism further includes sleeve, described
Nut, helical spring and pressing plate are arranged in sleeve, and the motor is connected in the upper end of sleeve, and the lower end of the sleeve is connected
There is capping plate, offers the through-hole protruded into for presser foot lifter upper end on the capping plate, above-mentioned pressing plate is opposite with through-hole.Sleeve is used for
The components such as protection nut, helical spring and pressing plate are accommodated, motor and capping plate are separately fixed at the both ends of sleeve, and formation one is whole
Module assembles more convenient.
In the pressure regulating mechanism of above-mentioned lifting pressre of sewing machine, the sleeve internal perisporium and nut, backing plate and pressure
Gap is all had between plate.Nut, backing plate and pressing plate not will receive the circumferential interference of sleeve, thus carrying out circumferentially rotating skidding
When reduce resistance.
Compared with prior art, the pressure regulating mechanism of this lifting pressre of sewing machine has the advantage that
1, due to nut be circumferentially it is unfixed, work as nut excessive descent, such as there is helical spring and be compressed into pole
Limit state or limiting section lean with limited post, and when causing nut that can not continue decline, nut can be with helical spring phase
Press plate rotary or nut are rotated with helical spring and pressing plate relative to presser foot lifter, to avoid nut that from can not declining and make
It is stuck to obtain screw rod, motor overload is caused to damage.
2, since position limiting structure makes limiting section and backing plate circumferentially positioned, so that the normal pressure of presser foot lifter be avoided to adjust
The nut of plastic material skids with respect to backing plate in journey.
3, since the sum of length of limiting section and limited post is greater than length when helical spring is compressed to limiting condition, work as limit
Nut is difficult to continue to decline and occur circumferentially rotating skidding when position portion and limited post lean, and there is no complete for helical spring at this time
Full compression avoids helical spring impaired to limiting condition to protect to helical spring.
Detailed description of the invention
Fig. 1 is the schematic perspective view of sewing machine.
Fig. 2 is the structural schematic diagram of pressure regulating mechanism middle sleeve partly cut-away.
Fig. 3 is the structure sectional view of pressure regulating mechanism.
Fig. 4 is the structure sectional view in Fig. 3 at A-A.
In figure, 1, rack；2, motor；21, screw rod；3, helical spring；31, backing plate；311, centre bore；312, limit convex
Portion；4, pressing plate；41, inserting column；42, limited post；5, nut；51, limiting section；511, limiting slot；6, presser foot lifter；61, spliced eye；
7, sleeve；8, plate is covered；81, through-hole.
Specific embodiment
It is specific embodiment of the utility model and in conjunction with attached drawing below, the technical solution of the utility model is made further
Description, but the utility model is not limited to these examples.
As shown in Figure 1, a kind of pressure regulating mechanism of lifting pressre of sewing machine, sewing machine includes rack 1, pressure regulating mechanism
Including motor 2, sleeve 7 and capping plate 8, motor 2 is fixed on the upper end of sleeve 7, and the lower end of sleeve 7 is fixed on capping plate 8, and
Capping plate 8 is fixed in rack 1, and sleeve 7 is inclined at this time, i.e., the axial direction of sleeve 7 and vertical direction form 15 ° to 25 °
Angle.In conjunction with shown in Fig. 2, Fig. 3, pressure regulating mechanism further includes screw rod 21, helical spring 3 and pressing plate 4,3 He of helical spring
Pressing plate 4 is arranged in sleeve 7, and gap is all had between 7 internal perisporium of sleeve and backing plate 31 and pressing plate 4, and screw rod 21 passes through
Threading is formed on the 2 axis periphery wall of motor of motor 2, and nut 5 is bolted on screw rod 21 and nut 5 is driven by screw rod 21
Lifting, nut 5 are located in sleeve 7, and also have gap between 7 internal perisporium of nut 5 and sleeve, and pressing plate 4 is located under nut 5
Side, nut 5 is circumferential to be not fixed, and for helical spring 3 between nut 5 and pressing plate 4, the upper end of helical spring 3 is fixed with metal material
The backing plate 31 of matter offers centre bore 311 on backing plate 31, and screw rod 21 passes through the centre bore 311 of backing plate 31, and 31 upper side of backing plate supports
It is pressed on 5 downside of nut, the lower end of helical spring 3 is pressed on the upper side of pressing plate 4, and the lower end of helical spring 3 and pressure
Plate 4 is circumferential to be not fixed, and presser foot lifter 6 has rod-shaped upper end, and covers and offer through-hole 81 on plate 8, pressing plate 4 and 81 phase of through-hole
Right, the upper end of presser foot lifter 6 passes through through-hole 81 and is pressed against each other with pressing plate 4, and pressing plate 4 and the upper end of presser foot lifter 6 are circumferentially not fixed,
Helical spring 3 is in compressive state under the action of nut 5 and pressing plate 4.
Specifically, there is inserting column 41, the upper end of presser foot lifter 6 has spliced eye 61, inserting column 41 on 4 downside of pressing plate
It is plugged in spliced eye 61, presser foot lifter 6 makes pressing plate 4 keep stablizing by inserting column 41, and has limit on 4 upper side of pressing plate
Column 42, the lower end of helical spring 3 are set on limited post 42, and pressing plate 4 is made under unfixed helical spring 3 by limited post 42
End keeps stablizing.Nut 5 is adopted made of plastic, has columnar limiting section 51 in 5 downside of nut, the screw hole of nut 5 runs through
To the lower end surface of limiting section 51, limiting section 51 is threaded through in the centre bore 311 of backing plate 31, as shown in connection with fig. 4, centre bore 311
Three stopper protrusions 312 on hole wall, the arc-shaped protrusion of stopper protrusion 312 offer three along axial direction on 51 outer wall of limiting section
The limiting slot 511 of setting, adaptable, the cross section of limiting slot 511 is also arc-shaped, and three stopper protrusions 312 are respectively engaged with
In three limiting slots 511, therefore limiting section 51 and backing plate 31 are circumferential fixed by stopper protrusion 312 and the cooperation realization of limiting slot 511
Position, wherein the sum of length of limiting section 51 and limited post 42 is greater than length when helical spring 3 is compressed to limiting condition, to keep away
Exempt from helical spring 3 to be killed and be damaged completely.
Helical spring 3 is compressed between nut 5 and pressing plate 4 when use, and pressing plate 4 generates downward pressure to presser foot lifter 6, because
Tensioning pressure is all had between this 3 upper end of helical spring and nut 5, between lower end and pressing plate 4 and between pressing plate 4 and presser foot lifter 6
Power, when motor 2 drives screw rod 21 to rotate, nut 5 will receive circumferential stiction under the action of helical spring 3, the circumferential direction
Stiction can carry out circumferential limitation to nut 5, prevent nut 5 from rotating together with screw rod 21, to realize the liter of nut 5
Drop carries out pressure adjusting to presser foot lifter 6 and such as occurs limiting section 51 when 5 excessive descent of nut and lean and cause with limited post 42
When nut 5 can not continue decline, be since nut 5 is circumferential it is unfixed, nut 5 can be pressed with helical spring 3 is opposite
The rotation of plate 4 or nut 5 with helical spring 3 and pressing plate 4 with respect to the rotation of presser foot lifter 6, thus avoid nut 5 that from can not declining and
So that screw rod 21 is stuck, lead to the overload damage of motor 2.
The specific embodiments described herein are merely examples of the spirit of the present invention.The utility model institute
Belonging to those skilled in the art can make various modifications or additions to the described embodiments or using similar
Mode substitute, but without departing from the spirit of the present application or beyond the scope of the appended claims.
Although the terms such as rack 1, motor 2, screw rod 21 are used more herein, it is not precluded using other terms
Possibility.The use of these terms is merely for the convenience of describing and explaining the nature of the invention；It is construed as
Any additional limitation is all contrary to the spirit of the present invention.
Claims (10)
1. a kind of pressure regulating mechanism of lifting pressre of sewing machine, including motor (2), the screw rod (21) by motor (2) driving, spiral
Spring (3) and pressing plate (4) for being pressed on presser foot lifter (6) upper end are bolted with nut (5) and nut on the screw rod (21)
(5) lifting is driven by screw rod (21), the pressing plate (4) is located at the lower section of nut (5), which is characterized in that nut (5) week
To being not fixed, the helical spring (3) is located between nut (5) and pressing plate (4), and the upper end of helical spring (3) is pressed on spiral shell
On female (5), lower end is pressed on pressing plate (4), and helical spring (3) is in compression shape under the action of nut (5) and pressing plate (4)
State.
2. the pressure regulating mechanism of lifting pressre of sewing machine according to claim 1, which is characterized in that the helical spring
(3) lower end is pressed on the upper side of pressing plate (4), and the lower end of helical spring (3) is circumferentially not fixed with pressing plate (4).
3. the pressure regulating mechanism of lifting pressre of sewing machine according to claim 2, which is characterized in that under the pressing plate (4)
There is the inserting column (41) being arranged for presser foot lifter (6) upper end on side, there is limited post on pressing plate (4) upper side
(42), the lower end of the helical spring (3) is set on limited post (42).
4. the pressure regulating mechanism of lifting pressre of sewing machine according to claim 2 or 3, which is characterized in that the spiral bullet
The upper end of spring (3) is fixed with metal caul (31), is offered centre bore (311) on the backing plate (31), and above-mentioned screw rod (21) is worn
The centre bore (311) of backing plate (31) is crossed, backing plate (31) upper side is pressed on nut (5) downside.
5. the pressure regulating mechanism of lifting pressre of sewing machine according to claim 4, which is characterized in that the nut (5) is adopted
Made of plastic, which has columnar limiting section (51), which is threaded through in backing plate (31)
In heart hole (311), and being equipped between limiting section (51) and backing plate (31) can prevent nut (5) to circumferentially rotate with respect to backing plate (31)
Position limiting structure.
6. the pressure regulating mechanism of lifting pressre of sewing machine according to claim 5, which is characterized in that the position limiting structure packet
Several stopper protrusions (312) on centre bore (311) hole wall are included, offers and several is set along axial direction on limiting section (51) outer wall
The limiting slot (511) set, several stopper protrusions (312) are respectively engaged in several limiting slots (511).
7. the pressure regulating mechanism of lifting pressre of sewing machine according to claim 5, which is characterized in that the limiting section (51)
It is greater than length when helical spring (3) are compressed to limiting condition with the sum of the length of limited post (42).
8. the pressure regulating mechanism of lifting pressre of sewing machine according to claim 5, which is characterized in that the motor (2)
There is external screw thread on motor (2) axis outer wall and form above-mentioned screw rod (21), the screw hole of the nut (5) is through to limiting section
(51) lower end surface.
9. the pressure regulating mechanism of lifting pressre of sewing machine according to claim 1 or 2 or 3, which is characterized in that the pressure
Regulating mechanism further includes sleeve (7), and the nut (5), helical spring (3) and pressing plate (4) are arranged in sleeve (7), described
Motor (2) is connected in the upper end of sleeve (7), and the lower end of the sleeve (7) is fixed with capping plate (8), opens on the capping plate (8)
Equipped with the through-hole (81) protruded into for presser foot lifter (6) upper end, above-mentioned pressing plate (4) and through-hole (81) are opposite.
10. the pressure regulating mechanism of lifting pressre of sewing machine according to claim 9, which is characterized in that in the sleeve (7)
Gap is all had between peripheral wall and nut (5), backing plate (31) and pressing plate (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820497386.5U CN208183245U (en) | 2018-04-09 | 2018-04-09 | A kind of pressure regulating mechanism of lifting pressre of sewing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820497386.5U CN208183245U (en) | 2018-04-09 | 2018-04-09 | A kind of pressure regulating mechanism of lifting pressre of sewing machine |
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| Publication Number | Publication Date |
|---|---|
| CN208183245U true CN208183245U (en) | 2018-12-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820497386.5U Withdrawn - After Issue CN208183245U (en) | 2018-04-09 | 2018-04-09 | A kind of pressure regulating mechanism of lifting pressre of sewing machine |
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| Country | Link |
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| CN (1) | CN208183245U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108193386A (en) * | 2018-04-09 | 2018-06-22 | 浙江鸿立缝制设备有限公司 | A kind of pressure regulating mechanism of lifting pressre of sewing machine |
| WO2021203593A1 (en) * | 2020-04-10 | 2021-10-14 | 杰克缝纫机股份有限公司 | Automatic presser foot pressure-adjusting device and sewing machine |
| CN114301226A (en) * | 2021-12-30 | 2022-04-08 | 深圳市科曼医疗设备有限公司 | Screw motor device |
-
2018
- 2018-04-09 CN CN201820497386.5U patent/CN208183245U/en not_active Withdrawn - After Issue
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108193386A (en) * | 2018-04-09 | 2018-06-22 | 浙江鸿立缝制设备有限公司 | A kind of pressure regulating mechanism of lifting pressre of sewing machine |
| CN108193386B (en) * | 2018-04-09 | 2023-12-15 | 浙江鸿立缝制设备有限公司 | Pressure regulating mechanism for lifting presser foot of sewing machine |
| WO2021203593A1 (en) * | 2020-04-10 | 2021-10-14 | 杰克缝纫机股份有限公司 | Automatic presser foot pressure-adjusting device and sewing machine |
| CN114301226A (en) * | 2021-12-30 | 2022-04-08 | 深圳市科曼医疗设备有限公司 | Screw motor device |
| CN114301226B (en) * | 2021-12-30 | 2023-07-18 | 深圳市科曼医疗设备有限公司 | Screw rod motor device |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20181204 Effective date of abandoning: 20231215 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20181204 Effective date of abandoning: 20231215 |