CN107393699A - Transformer framework - Google Patents
Transformer framework Download PDFInfo
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- CN107393699A CN107393699A CN201710669400.5A CN201710669400A CN107393699A CN 107393699 A CN107393699 A CN 107393699A CN 201710669400 A CN201710669400 A CN 201710669400A CN 107393699 A CN107393699 A CN 107393699A
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- China
- Prior art keywords
- fixed
- mentioned
- bobbin
- circle
- magnetic core
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-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/30—Fastening or clamping coils, windings, or parts thereof together; Fastening or mounting coils or windings on core, casing, or other support
- H01F27/306—Fastening or mounting coils or windings on core, casing or other support
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/24—Magnetic cores
- H01F27/26—Fastening parts of the core together; Fastening or mounting the core on casing or support
- H01F27/266—Fastening or mounting the core on casing or support
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/29—Terminals; Tapping arrangements for signal inductances
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Springs (AREA)
Abstract
The invention discloses a kind of transformer framework, including coil former apparatus, positioner, locking device, copper cash adhesive tape isolating device, stitch device.The beneficial effects of the present invention are be capable of the performance of comprehensive raising transformer framework.
Description
Technical field
The present invention relates to a kind of transformer framework, belong to the technical field of transformer.
Background technology
Also known as transformer coil holder, English are referred to as Bobbin, are the agent structure parts of transformer, and " skeleton " is vivid
Described its effect in transformer.Transformer is widely used in today's society, and corresponding main body is also essential,
So skeleton has irreplaceable effect at present.
Effect of the skeleton in transformer mainly have it is following some：
The 1st, the space of winding is provided for the copper cash in transformer,
2nd, the magnetic core in stationary transformer.
3rd, the wire casing in skeleton is provided the path of line during transformer production coiling.
4th, the pillar that the metal stitch in skeleton winds for the copper cash of transformer；It is connected after scolding tin with pcb board,
Transformer plays the effect of conduction when working.
5th, the salient point in skeleton, concave point or chamfering, placement direction or stitch order when transformer uses can be determined.
The content of the invention
The technical problem to be solved in the present invention is to provide a kind of transformer framework.
The present invention is achieved through the following technical solutions.
A kind of transformer framework, including：
Coil former apparatus, including bobbin, fixed cylinder, at least two cushioning supportive sliding blocks, above-mentioned fixed cylinder both ends open,
It is arranged in above-mentioned bobbin and in the same direction therewith, above-mentioned cushioning supportive sliding block is fixed on the outer surface of above-mentioned fixed cylinder, above-mentioned slow
The outer surface of support slipper is rushed as cambered surface and has at least two with the same axis of above-mentioned fixed cylinder, above-mentioned bobbin inner surface setting
Individual inner groovy, above-mentioned inner groovy are cambered surface and are slidably matched with above-mentioned cushioning supportive sliding block；
Positioner, including centring ring, at least two positioning support bars, at least two support bases, elastic mechanism, magnetic core are fixed
Position bar, magnetic core positioning disk, above-mentioned centring ring are fixed on the end of bobbin, and above-mentioned positioning support bar is through above-mentioned centring ring and refers to
To home position, above-mentioned support base is assemblied in the above-mentioned Inner ends for being set to support bar, and above-mentioned elastic mechanism is assemblied in positioned at above-mentioned fixed
Positioning support bar part in the circle circle of position, one end of above-mentioned magnetic core locating rod is fixed on above-mentioned centring ring exterior face surface, another
The fixed above-mentioned magnetic core positioning disk in end, above-mentioned magnetic core positioning disk are located at centring ring center；
Locking device, including rotation circle, locking circle, at least two helical springs, locking seat, adjustable spring, above-mentioned locking
Circle is fixed on the first end of above-mentioned bobbin, and above-mentioned locking circle is interior empty cyclic structure, and above-mentioned rotation circle is arranged on above-mentioned locking
In circle, above-mentioned locking circle offers the open section with the quantity such as helical spring, above-mentioned helical spring towards the surface outside bobbin
Above-mentioned rotation circle exterior face surface is fixed on, and the end of helical spring is straight line extension, and if helical spring is unfolded, its is straight
Line extension points to the home position of rotation circle, and the end other end that above-mentioned adjustable spring one end is fixed on straight line extension is fixed
In above-mentioned locking seat, above-mentioned torsional spring and its straight line extension is housed in above-mentioned locking circle, when rotating above-mentioned rotation circle,
Above-mentioned helical spring when being moved to open section above-mentioned straight line extension unfold；
Copper cash adhesive tape isolating device, including middle back-up ring, two port back-up rings, two isolation buckets, two cage rings, it is above-mentioned
Middle back-up ring is perpendicular to bobbin and is fixed on the outer surface of bobbin, and two above-mentioned port back-up rings are perpendicular to bobbin and fixation
In the outer surface at the first end and end of bobbin, two above-mentioned isolation casings mounted in bobbin and both ends respectively with middle back-up ring
It is fixedly connected with the port back-up ring of both sides, two above-mentioned isolation buckets are respectively provided with multiple shrinkage pools along bobbin direction, two isolation
Equal slip cap is enclosed in two isolation buckets, each cage ring is provided with stuck mechanism and can be caught in above-mentioned shrinkage pool；
Stitch device, including two fixed plates, multiple fixed blocks, multiple stitch, above-mentioned two fixed plate are separately fixed at
The side of bobbin end, above-mentioned fixed plate are provided with multiple parallel dividing plates, and two sides of each dividing plate are provided with convex
Bar, the two sides of each fixed block are provided with the groove being mutually matched with raised line, above-mentioned solid by the buckle of raised line and groove
Determine block and be fixed on above-mentioned fixed plate, each fixed block assembles above-mentioned stitch, above-mentioned stitch by continuous supporting section, penetrate section,
Supporting section is formed, and two above-mentioned supporting sections are provided with locking member.
Further, the two sides of above-mentioned inner groovy are provided with spring, and above-mentioned spring is fixedly attached to above-mentioned buffering branch
Support the two sides of sliding block.
Further, the threaded connecting rod of tool, above-mentioned company are provided with the back side center of above-mentioned magnetic core positioning disk
Extension bar is fixed through above-mentioned magnetic core locating rod and using positioning screw cap.
Further, above-mentioned elastic mechanism is arranged to recover spring, and one end of above-mentioned recovery spring is fixed on above-mentioned positioning
Circle, the other end are fixed on the Inner ends of above-mentioned support bar.
Further, above-mentioned locking seat is adjacent to the end face of magnetic core and is provided with one layer of soft layer.
Further, above-mentioned rotation circle exterior face surface is provided with handle.
Further, above-mentioned cage ring is provided with through hole, and above-mentioned stuck mechanism is arranged to have threaded plunger, above-mentioned to insert
Rod is inserted above-mentioned through hole and fixed with above-mentioned shrinkage pool and using stuck nut.
Further, the supporting section of above-mentioned stitch is provided with screw thread, and above-mentioned locking member is arranged to nut.
Beneficial effects of the present invention：
The setting of coil former apparatus, cushioning supportive sliding block enable the fixed cylinder of assembling magnetic core to be protected when bobbin rocks
It is relatively stable to hold fixed cylinder, avoids the caused moving because of rocking for transformer framework, protects magnetic core, while the bullet set
Spring can effectively protect cushioning supportive sliding block and bobbin so that the position of fixed cylinder make it that structure is more simple, overall to use effect
Fruit is preferable；
The setting of detent mechanism, after magnetic core loads bobbin, centring ring and support bar, the setting of elastic mechanism can make
Obtain positioning seat and be tightly fastened the port that magnetic core is located at bobbin end, the setting of magnetic core positioning disk can be according to specific needs with fixed
The position specific depth location of magnetic core, improve the position stability of magnetic core；
The setting of locking device, after magnetic core loads bobbin, by rotating rotation circle, by helical spring by being contained in locking
The housed state of circle is converted into extended position, and locking seat can be caused to be adjacent to magnetic core and be located at the end face that bobbin is just held, such energy
Ensure the locking of magnetic core position so that magnetic core is in stable location status, while the adjustable spring set can match necessarily
The depth location of scope inner magnetic core；
The setting of copper cash adhesive tape isolating device, according to the demand of copper cash twining amount, by cage ring in the position of isolation bucket
Adjustment enables to adhesive tape not produce damage to copper cash when installing additional, carried to mark off copper cash region and adhesive tape region
High use quality；
The setting of stitch device, can free assembly and disassembly fixed block, improve using flexible degree, pass through setting for stitch
Put, penetrate section i.e. through assembling panel, face can be closely assembled in the supporting section fixing lock for penetrating section upper-lower position by locking member
Plate, stitch is protected, improve service life.
Brief description of the drawings
Fig. 1 is the overall schematic of transformer framework of the present invention；
Fig. 2 is the schematic top plan view of coil former apparatus of the present invention；
Fig. 3 is the structural representation of positioner of the present invention；
Fig. 4 is the side schematic view of positioner of the present invention；
Fig. 5 is locking device helical spring un-deployed configuration schematic diagram of the present invention；
Fig. 6 is the structural representation of locking device helical spring of the present invention expansion；
Fig. 7 is the fixation schematic diagram of locking seat of the present invention；
Fig. 8 is the schematic diagram of copper cash adhesive tape isolating device of the present invention；
Fig. 9 is the structural representation one of stitch device of the present invention；
Figure 10 is the structural representation two of stitch device of the present invention.
Embodiment
The present invention is described in further detail below according to drawings and examples.
Reference picture 1- Figure 10, a kind of transformer framework, including coil former apparatus, positioner, locking device, copper cash adhesive tape
Isolating device, stitch device.
Coil former apparatus, including bobbin 1-1, fixed cylinder 1-2, at least two cushioning supportive sliding block 1-3, above-mentioned fixed cylinder
1-2 both ends opens, it is arranged in above-mentioned bobbin 1-1 and in the same direction therewith, above-mentioned cushioning supportive sliding block 1-3 is fixed on above-mentioned fixation
Cylinder 1-2 outer surface, above-mentioned cushioning supportive sliding block 1-3 outer surface for cambered surface and with the above-mentioned same axis of fixed cylinder 1-2, on
State bobbin 1-1 inner surface settings have at least two inner groovy 1-4, above-mentioned inner groovy 1-4 be cambered surface and with above-mentioned cushioning supportive
Sliding block slides the dynamic cooperations of 1-3..
Above-mentioned inner groovy 1-4 two sides are provided with spring 1-5, above-mentioned spring 1-5 and are fixedly attached to above-mentioned buffering branch
Support sliding block 1-3 two sides.
The setting of coil former apparatus, cushioning supportive sliding block enable the fixed cylinder of assembling magnetic core to be protected when bobbin rocks
It is relatively stable to hold fixed cylinder, avoids the caused moving because of rocking for transformer framework, protects magnetic core, while the bullet set
Spring can effectively protect cushioning supportive sliding block and bobbin so that the position of fixed cylinder make it that structure is more simple, overall to use effect
Fruit is preferable.
Positioner, including centring ring 2-1, at least two positioning support bar 2-2, at least two support base 2-3, elastic machine
Structure 2-4, magnetic core locating rod 2-5, magnetic core positioning disk 2-6, above-mentioned centring ring 2-1 are fixed on bobbin 1-1 end, above-mentioned positioning
For support bar 2-2 through above-mentioned centring ring 2-1 and pointing to home position, above-mentioned support base 2-3, which is assemblied in, above-mentioned is set to support bar 2-2
Inner ends, above-mentioned elastic mechanism 2-4 be assemblied in positioned at above-mentioned centring ring 2-1 circle in positioning support bar 2-2 parts, above-mentioned magnetic core
Locating rod 2-5 one end is fixed on above-mentioned centring ring 2-1 exterior face surfaces, and the other end fixes above-mentioned magnetic core positioning disk 2-6, above-mentioned
Magnetic core positioning disk 2-6 is located at centring ring 2-1 centers.
The threaded connecting rod 2-61 of tool, above-mentioned connection are provided with above-mentioned magnetic core positioning disk 2-6 back side center
Bar 2-61 is fixed through above-mentioned magnetic core locating rod 2-5 and using positioning screw cap 2-62.
Above-mentioned elastic mechanism 2-4 is arranged to recover spring, and one end of above-mentioned recovery spring is fixed on above-mentioned centring ring 2-1,
The other end is fixed on above-mentioned support bar 2-2 Inner ends.
The setting of detent mechanism, after magnetic core loads bobbin, centring ring and support bar, the setting of elastic mechanism can make
Obtain positioning seat and be tightly fastened the port that magnetic core is located at bobbin end, the setting of magnetic core positioning disk can be according to specific needs with fixed
The position specific depth location of magnetic core, improve the position stability of magnetic core.
Locking device, including rotation circle 3-1, locking circle 3-2, at least two helical spring 3-3, locking seat 3-4, flexible bullet
Spring 3-5, above-mentioned locking circle 3-2 are fixed on above-mentioned bobbin 1-1 first end, and above-mentioned locking circle 3-2 is interior empty cyclic structure, on
State rotation circle 3-1 to be arranged in above-mentioned locking circle 3-2, above-mentioned locking circle 3-2 offers towards the surface outside bobbin and spiral
The open section 3-21, above-mentioned helical spring 3-3 of the quantity such as spring 3-3 are fixed on above-mentioned rotation circle 3-1 exterior face surfaces, and spiral shell
The end for revolving spring 3-3 is straight line extension 3-31, if helical spring is unfolded, its straight line extension 3-31 points to the circle of rotation circle
Heart position, the end other end that above-mentioned adjustable spring 3-5 one end is fixed on straight line extension 3-31 are fixed on above-mentioned locking seat 3-
4, above-mentioned torsional spring 3-3 and its straight line extension 3-31 is housed in above-mentioned locking circle 3-2, as the above-mentioned rotation circle 3-1 of rotation
When, above-mentioned helical spring 3-3 when being moved to open section above-mentioned straight line extension 3-31 unfold.
The end face that above-mentioned locking seat 3-4 is adjacent to magnetic core is provided with one layer of soft layer (not shown).
Above-mentioned rotation circle 3-1 exterior face surfaces are provided with handle 3-11.
The setting of locking device, after magnetic core loads bobbin, by rotating rotation circle, by helical spring by being contained in locking
The housed state of circle is converted into extended position, and locking seat can be caused to be adjacent to magnetic core and be located at the end face that bobbin is just held, such energy
Ensure the locking of magnetic core position so that magnetic core is in stable location status, while the adjustable spring set can match necessarily
The depth location of scope inner magnetic core.
Copper cash adhesive tape isolating device, including middle back-up ring 4-1, two port back-up ring 4-2, two isolation bucket 4-3, two every
Perpendicular to bobbin 1-1 and bobbin 1-1 outer surface, two above-mentioned ports are fixed on from circle 4-4, above-mentioned middle back-up ring 4-1
Back-up ring 4-2 is perpendicular to bobbin 1-1 and is fixed on the outer surface at bobbin 1-1 first end and end, two above-mentioned isolation bucket 4-3
It is sleeved on bobbin 1-1 and port back-up ring 4-2 of the both ends respectively with middle back-up ring 4-1 and both sides is fixedly connected, two above-mentioned
Isolation bucket 4-3 is respectively provided with multiple shrinkage pool 4-31 along bobbin direction, and two equal slip caps of cage ring 4-4 are in two isolation bucket 4-
3, each cage ring 4-4 are provided with stuck mechanism 4-5 and can be caught in above-mentioned shrinkage pool 4-31.
Above-mentioned cage ring 4-4 is provided with through hole, and above-mentioned stuck mechanism 4-5 is arranged to have threaded plunger, above-mentioned plunger
Above-mentioned through hole is inserted to fix with above-mentioned shrinkage pool 4-31 and using stuck nut 4-51.
The setting of copper cash adhesive tape isolating device, according to the demand of copper cash twining amount, by cage ring in the position of isolation bucket
Adjustment enables to adhesive tape not produce damage to copper cash when installing additional, carried to mark off copper cash region and adhesive tape region
High use quality.
Stitch device, including two fixed plate 5-1, multiple fixed block 5-2, multiple stitch 5-3, above-mentioned two fixed plate 5-
1 is separately fixed at the side of bobbin 1-1 ends, and above-mentioned fixed plate 5-1 is provided with multiple parallel dividing plate 5-11, each dividing plate
Two sides be provided with raised line 5-12, each fixed block 5-2 two sides and be provided with what is be mutually matched with raised line 5-12
Groove, above-mentioned fixed plate 5-1 is fixed on by the above-mentioned fixed block 5-2 of the buckle of raised line and groove, each fixed block 5-2 is assembled
Above-mentioned stitch 5-3, above-mentioned stitch 5-3 by continuous supporting section 5-31, penetrate a section 5-32, supporting section 5-33 is formed, two are above-mentioned
Supporting section is provided with locking member 5-4.
The supporting section of above-mentioned stitch is provided with screw thread, and above-mentioned locking member 5-4 is arranged to nut.
The setting of stitch device, can free assembly and disassembly fixed block, improve using flexible degree, pass through setting for stitch
Put, penetrate section i.e. through assembling panel, face can be closely assembled in the supporting section fixing lock for penetrating section upper-lower position by locking member
Plate, stitch is protected, improve service life.
The above embodiments merely illustrate the technical concept and features of the present invention, and its object is to allow be familiar with this art
Personage can understand present invention and be carried out, and it is not intended to limit the scope of the present invention.It is all according to the present invention
The equivalent change or modification that Spirit Essence is made, it should all cover within the scope of the present invention.
Claims (8)
- A kind of 1. transformer framework, it is characterised in that including：Coil former apparatus, including bobbin, fixed cylinder, at least two cushioning supportive sliding blocks, the fixed cylinder both ends open, set In the bobbin and in the same direction therewith, the cushioning supportive sliding block is fixed on the outer surface of the fixed cylinder, the buffering branch The outer surface of support sliding block has at least two in for cambered surface and with the same axis of the fixed cylinder, the bobbin inner surface setting Groove, the inner groovy are cambered surface and are slidably matched with the cushioning supportive sliding block；Positioner, including centring ring, at least two positioning support bars, at least two support bases, elastic mechanism, magnetic core positioning Bar, magnetic core positioning disk, the centring ring are fixed on the end of bobbin, and the positioning support bar is through the centring ring and points to Home position, the support base are assemblied in the Inner ends for being set to support bar, and the elastic mechanism is assemblied in positioned at the positioning Positioning support bar part in circle circle, one end of the magnetic core locating rod is fixed on the centring ring exterior face surface, the other end The fixed magnetic core positioning disk, the magnetic core positioning disk are located at centring ring center；Locking device, including rotation circle, locking circle, at least two helical springs, locking seat, adjustable spring, the locking circle are solid The first end of the bobbin is scheduled on, the locking circle is interior empty cyclic structure, and the rotation circle is arranged in the locking circle, The locking circle offers the open section with the quantity such as helical spring towards the surface outside bobbin, and the helical spring is fixed on The rotation circle exterior face surface, and the end of helical spring is straight line extension, and if helical spring is unfolded, its straight line extends The home position of Duan Zhixiang rotation circles, described adjustable spring one end be fixed on straight line extension the end other end be fixed on it is described Locking seat, torsional spring and its straight line extension are housed in the locking circle, when rotating the rotation circle, the spiral shell The straight line extension is unfolded when rotation spring is moved to open section；Copper cash adhesive tape isolating device, including middle back-up ring, two port back-up rings, two isolation buckets, two cage rings, the centre Back-up ring is perpendicular to bobbin and is fixed on the outer surface of bobbin, and two port back-up rings are perpendicular to bobbin and fix online The outer surface at the first end and end of coil, two isolation casings mounted in bobbin and both ends respectively with middle back-up ring and two The port back-up ring of side is fixedly connected, and two isolation buckets are respectively provided with multiple shrinkage pools along bobbin direction, and two cage rings are equal In two isolation buckets, each cage ring is provided with stuck mechanism and can be caught in the shrinkage pool slip cap；Stitch device, including two fixed plates, multiple fixed blocks, multiple stitch, described two fixed plates are separately fixed at coil The side of frame end, the fixed plate are provided with multiple parallel dividing plates, and two sides of each dividing plate are provided with raised line, often The two sides of individual fixed block are provided with the groove being mutually matched with raised line, are consolidated by fixed block described in the buckle of raised line and groove Be scheduled on the fixed plate, each fixed block assembles the stitch, the stitch by continuous supporting section, penetrate section, supporting section Form, two supporting sections are provided with locking member.
- 2. transformer framework according to claim 1, it is characterised in that the two sides of the inner groovy are provided with bullet Spring, the spring are fixedly attached to the two sides of the cushioning supportive sliding block.
- 3. transformer framework according to claim 1, it is characterised in that set at the back side center of the magnetic core positioning disk The threaded connecting rod of tool is provided with, the connecting rod is fixed through the magnetic core locating rod and using positioning screw cap.
- 4. transformer framework according to claim 1, it is characterised in that the elastic mechanism is arranged to recover spring, institute The one end for stating recovery spring is fixed on the centring ring, and the other end is fixed on the Inner ends of the support bar.
- 5. transformer framework according to claim 1, it is characterised in that the end face that the locking seat is adjacent to magnetic core is provided with One layer of soft layer.
- 6. transformer framework according to claim 1, it is characterised in that the rotation circle exterior face surface is provided with handle Hand.
- 7. transformer framework according to claim 1, it is characterised in that the cage ring is provided with through hole, described stuck Mechanism is arranged to have threaded plunger, and the plunger is inserted the through hole and fixed with the shrinkage pool and using stuck nut.
- 8. transformer framework according to claim 1, it is characterised in that the supporting section of the stitch is provided with screw thread, institute State locking member and be arranged to nut.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710669400.5A CN107393699B (en) | 2017-08-08 | 2017-08-08 | Transformer framework |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710669400.5A CN107393699B (en) | 2017-08-08 | 2017-08-08 | Transformer framework |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107393699A true CN107393699A (en) | 2017-11-24 |
| CN107393699B CN107393699B (en) | 2019-05-10 |
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ID=60354482
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710669400.5A Active CN107393699B (en) | 2017-08-08 | 2017-08-08 | Transformer framework |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107393699B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000311812A (en) * | 1999-04-27 | 2000-11-07 | Mitsubishi Electric Corp | Bobbin for rounded corner coil type induction motors |
| CN201606545U (en) * | 2009-12-25 | 2010-10-13 | 烟台顿汉布什工业有限公司 | Hinge-type check valve |
| CN104157424A (en) * | 2014-08-28 | 2014-11-19 | 合肥市菲力克斯电子科技有限公司 | Fixed adjustable transformer framework |
-
2017
- 2017-08-08 CN CN201710669400.5A patent/CN107393699B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000311812A (en) * | 1999-04-27 | 2000-11-07 | Mitsubishi Electric Corp | Bobbin for rounded corner coil type induction motors |
| CN201606545U (en) * | 2009-12-25 | 2010-10-13 | 烟台顿汉布什工业有限公司 | Hinge-type check valve |
| CN104157424A (en) * | 2014-08-28 | 2014-11-19 | 合肥市菲力克斯电子科技有限公司 | Fixed adjustable transformer framework |
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| Publication number | Publication date |
|---|---|
| CN107393699B (en) | 2019-05-10 |
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