CN207738176U - Filter paper blocks torque holding meanss - Google Patents
Filter paper blocks torque holding meanss Download PDFInfo
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- CN207738176U CN207738176U CN201721747847.1U CN201721747847U CN207738176U CN 207738176 U CN207738176 U CN 207738176U CN 201721747847 U CN201721747847 U CN 201721747847U CN 207738176 U CN207738176 U CN 207738176U
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- swing arm
- wheel disc
- filter paper
- shaft
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Abstract
The utility model provides a kind of filter paper retardance torque holding meanss,Including substrate and the belt wheel being disposed on the substrate,Belt wheel is protruding with a shaft along its axis direction,Shaft extend into the other side of substrate across substrate,Shaft offers connecting hole along its axial direction,Connector is coaxially plugged in connecting hole,One end end of connector is located at outside connecting hole and is installed with regular polygon wheel disc on the end,Torque spring is provided between wheel disc and shaft,Shaft is rotated by torque spring band follower link,It is provided with resetting-mechanism on the other side of substrate opposing pulleys,Idler wheel and return unit are provided on resetting-mechanism,Idler wheel with wheel disc is tangent presses,When shaft band runner disc rotates,Wheel disc drives idler wheel to rotate and idler wheel is enable to generate radial displacement so that the corner angle of wheel disc pass through the point of contact between wheel disc and idler wheel,After the corner angle of wheel disc are by point of contact,The adaptable pushing rolling wheels radial direction return of return unit so that idler wheel always with wheel disc is tangent presses.
Description
Technical field
The utility model belongs to field of mechanical technique, is related to torque holding meanss in a kind of V belt translation, especially a kind of suitable
Filter paper for Atmospheric particulates analyzer blocks torque holding meanss.
Background technology
Atmospheric particulates refer to disperseing the general name of solid-state or liquid particles object shape substance in an atmosphere, particle size range
About 0.1-100 microns.In the prior art, the primary metering method of air particle has：Gravimetric method, is shaken at β attenuation sensors
Swing sedimentation balance method.Wherein, the degree of automation of β attenuation sensors is higher, continuous accurate measurement can be carried out, on heavy contamination or ground
The important place in position is managed, the situation of change of particulate in air concentration can be effectively reflected, air is carried out for environmental protection administration
Quality evaluation and government decision provide accurately and reliably data foundation.So β attenuation sensors are widely used in particle quality testing
It surveys in device.
In the prior art, using the detecting instrument of β attenuation sensors, generally by filter-paper-tape come particle concentrations object.
During grain analyte detection, filter paper is expendable consumed product, usually conveys filter paper by V belt translation, ensures that detecting instrument can be automatic
Continuous detection.Patent name if number of patent application is 2012104833975 is《The enrichment of particulate matter and detection device》It is special
Profit, the patent convey filter paper using V belt translation, and filter paper is advanced by V belt translation, when being sampled, filter paper stop motion,
Grain object is enriched on filter paper.It in entire detection process, needs that filter paper is made to be in straight tight state, convenient for particulate matter on filter paper
Uniform enrichment provides quality higher detection sample.
In filter paper transmission process, due to particulate matter be enriched with and detect and etc., filter paper needs constantly advance
With the step that halts.When filter paper advances, the corresponding rotation of belt wheel of filter paper is conveyed, when filter paper halts, conveys filter paper
Belt wheel is corresponding to stop operating.Detecting instrument is usually motor with the driving mechanism that movable belt pulley rotates, and belt wheel is stopped by turning to
In the process, due to the inertia of its own, after motor is stopped, belt wheel still can rotate a certain distance, this section of advance
Distance can cause filter paper to distort, and relaxation has an impact testing result.
Utility model content
The purpose of this utility model is the presence of the above problem in view of the prior art, it is proposed that a kind of filter paper retardance torque guarantor
Device is held, filter paper retardance torque holding meanss are turned back to origin-location after belt wheel can be made to be rotated under effect of inertia, to
Ensure that filter paper is always maintained at exceptionally straight formation state in detection process.
The purpose of this utility model can be realized by following technical proposal：
A kind of filter paper blocks torque holding meanss, including substrate and is disposed on the substrate the belt wheel for conveying filter paper, institute
It states belt wheel and is protruding with a shaft along its axis direction, the shaft passes through the substrate to extend into the other side of substrate, described turn
Axis offers connecting hole along its axial direction, and connector is coaxially plugged in the connecting hole, and the connector can be rotated relative to shaft,
One end end of the connector is located at outside connecting hole and is installed with regular polygon wheel disc, the wheel disc and shaft on the end
Between be provided with torque spring, the shaft is rotated by torque spring band follower link, the substrate opposing pulleys it is another
It is provided with resetting-mechanism on side, idler wheel and return unit are provided on the resetting-mechanism, the idler wheel is tangent tight with the wheel disc
Pressure, when the shaft drives the wheel disc rotation, the wheel disc drives idler wheel to rotate and so that idler wheel is generated radial displacement so that wheel
The corner angle of disk can be by the point of contact between wheel disc and idler wheel, after the corner angle of the wheel disc are by the point of contact, the return unit
Adaptable pushing rolling wheels radial direction return so that idler wheel always with the wheel disc is tangent presses.
Preferably, the resetting-mechanism includes the swing arm transferred on substrate, the idler wheel is rotatably mounted on pendulum
On arm, the return unit is drag hook spring, and one end of the drag hook spring acts on swing arm, and the other end acts on substrate.
Preferably, the rotating fulcrum of the swing arm is located on the end of swing arm one end, the drag hook spring intersects with swing arm
In on the other end end of swing arm, for the idler wheel between drag hook spring and rotating fulcrum, the wheel disc pushes swing arm to swing,
Swing arm pulls drag hook spring to make pulling action.
Preferably, the rotating fulcrum of the swing arm is located among swing arm, the idler wheel is located on one end end of swing arm,
The drag hook spring is intersected at swing arm on the other end end of swing arm, and the wheel disc pushes swing arm to make moving seesaw-type around rotating fulcrum
Action, swing arm pull drag hook spring to make pulling action.
Preferably, being provided with card column in the swing arm, the drag hook spring is articulated in the card column.
Preferably, being provided with connecting pole on the substrate, annular groove, the drag hook spring are provided on the connecting pole
Connecting pin be articulated in the annular groove.
Preferably, the drag hook spring is perpendicular to the swing arm.
Preferably, the connecting hole runs through the belt wheel, opening of the connecting hole close to belt wheel one end is provided with
Stepped hole, one end of the connector, which is extend into the stepped hole, forms limiting section, is provided with card slot on the limiting section, institute
It states and is provided with clamp spring in card slot.
Preferably, being provided with cover board on the belt wheel, the cover board snaps onto on the stepped hole and closes described
Rank hole is open.
Preferably, fixing sleeve is equipped with lantern ring in the shaft, the torque spring is socketed in the shaft and passes through
Lantern ring is connect with shaft.
Compared with prior art, the utility model has following technological merit：
In the utility model, belt wheel is after the driving mechanisms such as motor are stopped because to be rotated further one small for self inertia effect
Segment distance, since the regular polygon wheel disc on connector is pressed by the idler wheel in swing arm, connector can not follow belt wheel to rotate, even
It produces relative rotation between fitting and belt wheel so that the torque spring between wheel disc and shaft generates deformation, and torque spring generates
Deformation belt wheel can be pulled to rotate backward, so that it is revert to preset stop position, to ensure that filter paper is in exceptionally straight smooth shape
State.
Description of the drawings
Fig. 1 is an example structure figure of the utility model.
Fig. 2 is another example structure figure of the utility model.
Fig. 3 is the sectional structure chart of the utility model.
Fig. 4 is the portions A enlarged drawing in Fig. 1.
In figure, 10, substrate；11, connecting pole；12, annular groove；20, belt wheel；21, cover board；22, shaft；23, stepped hole；
24, lantern ring；30, drag hook spring；40, wheel disc；41, connector；42, clamp spring；43, limiting section；50, swing arm；51, rotating fulcrum；
60, idler wheel；70, torque spring.
Specific implementation mode
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.
β attenuation sensors detect Atmospheric Grains ingredient, and the sample unit of detecting instrument is filter paper, sample gas passes through
Filter paper makes determinand particle rich on filter paper, then obtains testing result to filter paper progress β radiation absorptions detection, this kind
Airborne particulate detecting instrument, filter paper are conveyed by V belt translation, and filter paper is carrying out particulate matter enrichment and the detection of β radiation absorptions
When, it needs filter paper being fixed on enrichment point or test point, i.e., in a continuous detection process, filter paper usually repeats advance
Or stopping action.In view of the self-characteristic of this kind of detection method, in continuous detection process, need to ensure that filter paper is in exceptionally straight flat
Whole state obtains accurate testing result in order to which particulate matter is uniformly enriched on filter paper.Filter paper is conveyed using V belt translation
When, belt wheel will continue to rotation a small distance after the driving mechanisms such as motor are stopped, since self inertia acts on, on belt wheel
Filter paper can then belt wheel be followed to be fed forward so that filter paper forms wavy distortion, is not easy to particulate matter uniform enrichment and is filtering
On paper, cause detection error.
The utility model based on the above issues, provides a kind of filter paper retardance torque holding meanss.As shown in figures 1 and 3,
It includes substrate 10 that this filter paper, which blocks torque holding meanss, and substrate 10 is fixed on detecting instrument, and conveying filter is provided on substrate 10
The belt wheel 20 of paper, belt wheel 20 are protruding with a shaft 22 along its axis direction, and shaft 22 is rotatablely connected on the substrate 10 by bearing,
And one end of shaft 22 extend into the other side of substrate 10 across substrate 10.Connecting hole is offered along its axial direction in shaft 22,
Connector 41 is coaxially plugged in connecting hole, connector 41 rotates grafting by bearing and shaft 22, keeps connector 41 opposite
Shaft 22 rotates.One end end of connector 41 is located at outside connecting hole and is installed with regular polygon wheel disc 40 on the end, should
Wheel disc 40 and connector 41 are coaxial, and torque spring 70,41 turns of 22 opposite joints of shaft are provided between wheel disc 40 and shaft 22
When dynamic, 70 deformation of torque spring, the torsion that 70 deformation of torque spring generates shaft 22 or connector 41 can be driven to rotate with
The two is set to be returned to equilbrium position.
A swing arm 50 is provided on the other side of 10 opposing pulleys 20 of substrate, swing arm 50 is rotated by a rotating fulcrum 51
Connection on the substrate 10, is provided with idler wheel 60 and return unit in swing arm 50, idler wheel 60 is tangent with wheel disc 40 and presses wheel disc 40,
Return unit ensures that idler wheel 60 presses wheel disc 40 always in 50 swing process of swing arm, and idler wheel 60 is made to form one to the rotation of wheel disc 40
Fixed retardation.
In the continuous detection process of detecting instrument, filter paper has advance and stops two kinds of working conditions.It is corresponding when filter paper advances
Belt wheel 20 rotated under the drive of the driving mechanisms such as motor, with provide filter paper advance power；When filter paper stops, corresponding electricity
Machine is stopped, and belt wheel 20 stops operating.
When filter paper advances, need to ensure that wheel disc 40 can follow belt wheel 20 to rotate.In this case, the construction of wheel disc 40 is just more
Side shape, wheel disc 40 will follow belt wheel 20 to rotate, and need that swing arm 50 is pushed to swing, so that the corner angle on wheel disc 40 can pass through wheel disc
Point of contact between 40 and idler wheel 60.The power that wheel disc 40 pushes swing arm 50 to swing derives from torque spring 70.Filter paper is in advance shape
When state, belt wheel 20 is rotated by the driving mechanisms such as motor, and regular polygon wheel disc 40 is pressed by idler wheel 60 can not be correspondingly
Belt wheel 20 is followed to rotate, torque spring 70 between the two just will produce deformation, and the torsion that 70 deformation of torque spring generates can push away
Movable pendulum arm 50 is swung, until the corner angle of wheel disc 40 can pass through the point of contact between wheel disc 40 and idler wheel 60.
When point of contact of the edges and corners of wheel disc 40 between wheel disc 40 and idler wheel 60, the distance of center circle between wheel disc 40 and idler wheel 60
From maximum, i.e., the distance that swing arm 50 is swung is maximum, and the deformation quantity of torque spring 70 is also maximum.The corner angle of wheel disc 40 have crossed wheel disc 40
Behind point of contact between idler wheel 60, idler wheel 60 does not generate resistance, pressure and torsion of the wheel disc 40 in idler wheel 60 to the rotation of wheel disc 40
Quick rotation under the torsion of power spring 70, during this, the circle center distance between wheel disc 40 and idler wheel 60 is by being up to minimum.
When filter paper halts, motor stalls, but belt wheel 20 still can rotate one under the effect of inertia of itself
Small segment distance, since idler wheel 60 is to the retardation of wheel disc 40, the rotation of 20 opposite joints 41 of belt wheel, belt wheel 20 and connector 41
Between torque spring 70 generate deformation.Belt wheel 20 is rotated made by effect of inertia, the elastic force that 70 deformation of torque spring generates
The corner angle for pushing swing arm 50 to swing to wheel disc 40 are not enough to by the way that at the point of contact of wheel disc 40 and idler wheel 60, i.e., wheel disc 40 can not turn
It is dynamic.At this point, wheel disc 40 is in halted state, the torsion twisting belt wheel 20 that 70 deformation of torque spring generates turns round, and belt wheel 20 is made to return
Position when position stops to motor just ensure that filter paper by after proceeding to and stopping this process, it is used to eliminate belt wheel 20 in this way
Property rotation influence, be still within exceptionally straight formation state.
Specifically, return unit is drag hook spring 30, and one end of drag hook spring 30 is fixed on the substrate 10, and the other end is fixed on
In swing arm 50, under natural conditions, drag hook spring 30 is in tensional state by a small margin, and drag hook spring 30 stretches the elastic force generated and drives
Idler wheel 60 in swing arm 50 presses the formation of wheel disc 40.
Preferably, it is provided with connecting pole 11 on substrate 10, annular groove is provided on connecting pole 11, card is provided in swing arm 50
Column, 30 one end of drag hook spring are articulated in the annular groove of connecting pole 11, and the other end of drag hook spring 30 is connected in card column.In this way
On the one hand the dismounting for being convenient for drag hook spring 30 is set, and on the other hand, drag hook spring 30 can be rotated around connecting pole 11, adaptive
Swing arm 50 should be followed to swing and rotate, the draw direction to ensure drag hook spring 30 is vertical with swing arm 50, and drag hook spring 30 is to pendulum
The direction of pull of arm 50 is consistent with the direction of motion of swing arm 50, and structural stability is good.
As shown in Fig. 2, in some embodiments, the rotating fulcrum 51 of swing arm 50 is located among swing arm 50, and idler wheel 60 is located at
One end end of swing arm 50, drag hook spring 30 intersect at the other end end of swing arm 50 with swing arm 50, form a moving seesaw-type thick stick
Linkage, drag hook spring 30 can ensure idler wheel 60 to the pulling force of swing arm 50 and wheel disc 40 is tangent always presses.
As shown in figure 4, in some embodiments, the rotating fulcrum 51 of swing arm 50 is located on one end end of swing arm 50, draw
Hook spring 30 and swing arm 50 intersect on the other end end of swing arm 50, and idler wheel 60 is movable to be mounted on drag hook spring 30 and rotation
Between fulcrum 51, a lever mechanism is formed.For example, wheel disc 40 pushes swing arm 50 to swing clockwise, the swing of swing arm 50 makes
Drag hook spring 30 stretches, and drag hook spring 30 stretches generation elastic force and swing arm 50 is pulled counterclockwise to swing, wherein idler wheel 60 and pendulum
The distance between activity supporting point is the torque of 40 thrust of wheel disc, and the distance between drag hook spring 30 and swing pivot are drag hook spring 30
The torque of pulling force.In the lever mechanism, the torque of 30 pulling force of drag hook spring is more than wheel disc 40 to the torque of 50 thrust of swing arm, is convenient for
Drag hook spring 30 applies pulling force to swing arm 50, and idler wheel 60 is made to press wheel disc 40.
In above-described embodiment, when belt wheel 20 generates rotation under self inertia, belt wheel 20 applies torque spring 70
Power is smaller, and swing arm 50 is then counteracted the torsion that torque spring 70 generates wheel disc 40 by the pulling force of drag hook spring 30, plays
Apparent retardation, torque spring 70 then can driving pulley 20 rotate backward so that keep flat between belt wheel 20 and wheel disc 40
Weighing apparatus, then achievees the purpose that filter paper keeps exceptionally straight formation state.
In this application, the connecting hole in shaft 22 extends at belt wheel 20 and runs through belt wheel 20, convenient for the company of being plugged on
The connector 41 connect in hole carries out axial limiting, and after preventing connector 41 from moving axially, wheel disc 40 is channeled bit with idler wheel 60, idler wheel 60
Wheel disc 40 can not be pressed, swing arm 50 can not play the role of retardance to belt wheel 20.
Specifically, there are one stepped hole 23, stepped hole 23 and companies for opening setting of the connecting hole close to 20 one end of belt wheel
Hole coaxial arrangement is connect, one end of connector 41, which is extend into across connecting hole in stepped hole 23, forms limiting section 43,43 liang of limiting section
Side is provided with card slot, and clamp spring 42 is provided in card slot, and the both ends of clamp spring 42 are resisted against on the step surface of stepped hole 23, to even
Fitting 41 forms axial limiting.
It is provided with screw thread on the inner wall of stepped hole 23, cover board 21 is provided on belt wheel 20, what cover board 21 was threadably secured
Mode is fixed on stepped hole 23, is closed to stepped hole 23, and 21 one side of cover board prevents the impurity such as dust by stepped hole
23 enter in connecting hole, and influence is played in the mutual rotation of countershaft 22 and connector 41, is on the other hand also allowed for connector
41 are assembled and are removed.
In the application, after shaft 22 is mutually rotated with connector 41, torque magnitude and pendulum that 70 deformation of torque spring generates
50 upper roller 60 of arm determines the work of entire retardance torque holding meanss for the mutual magnitude relationship between the pressure of wheel disc 40
As a result.When belt wheel 20 is driven by motor, the torsion that 70 deformation of torque spring generates is more than idler wheel 60 to the pressure of wheel disc 40, then turns round
Power spring 70 is pushed swing arm 50 open with runner disc 40 and is rotated；Belt wheel 20 is during by moving static, when being rotated because of inertia, torsion
The torsion that 70 deformation of spring generates is less than idler wheel 60 to the pressure of wheel disc 40, then wheel disc 40 can not push the rotation of swing arm 50, torsion open
Spring 70 generates reaction force for belt wheel 20, and belt wheel 20 is made to invert.
In some embodiments, in order to ensure that the torsion of torque spring 70 is consistent with the rotation direction of shaft 22, in shaft
Fixing sleeve is equipped with lantern ring 24 on 22, and torque spring 70 is socketed in the shaft 22 and is connect with shaft 22 by lantern ring 24, this
Sample, it is ensured that torque spring 70 is coaxially disposed with shaft 22, convenient for calculating the torque magnitude of torque spring 70.
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.
Claims (10)
1. a kind of filter paper blocks torque holding meanss, including substrate and it is disposed on the substrate the belt wheel for conveying filter paper, it is special
Sign is that the belt wheel is protruding with a shaft along its axis direction, and the shaft extend into the another of substrate across the substrate
Side, the shaft offer connecting hole along its axial direction, and connector is coaxially plugged in the connecting hole, and the connector can be opposite
Shaft rotates, and one end end of the connector is located at outside connecting hole and is installed with regular polygon wheel disc on the end, described
Torque spring is provided between wheel disc and shaft, the shaft is rotated by torque spring band follower link, and the substrate is opposite
Be provided with resetting-mechanism on the other side of belt wheel, be provided with idler wheel and return unit on the resetting-mechanism, the idler wheel with it is described
Wheel disc is tangent to press, and when the shaft drives the wheel disc rotation, the wheel disc drives idler wheel to rotate and idler wheel is made to generate radial direction
Displacement so that wheel disc corner angle can by the point of contact between wheel disc and idler wheel, after the corner angle of the wheel disc are by the point of contact,
The adaptable pushing rolling wheels radial direction return of the return unit so that idler wheel always with the wheel disc is tangent presses.
2. filter paper according to claim 1 blocks torque holding meanss, which is characterized in that the resetting-mechanism includes switching
Swing arm on substrate, the idler wheel are rotatably mounted in swing arm, and the return unit is drag hook spring, the drag hook spring
One end act on swing arm, the other end acts on substrate.
3. filter paper according to claim 2 blocks torque holding meanss, which is characterized in that the rotating fulcrum position of the swing arm
In on the end of swing arm one end, the drag hook spring is intersected at swing arm on the other end end of swing arm, and the idler wheel is located at drag hook
Between spring and rotating fulcrum, the wheel disc pushes swing arm to swing, and swing arm pulls drag hook spring to make pulling action.
4. filter paper according to claim 2 blocks torque holding meanss, which is characterized in that the rotating fulcrum position of the swing arm
Among swing arm, the idler wheel is located on one end end of swing arm, and the drag hook spring intersects at the other end of swing arm with swing arm
On end, the wheel disc pushes swing arm to make moving seesaw-type action around rotating fulcrum, and swing arm pulls drag hook spring to make pulling action.
5. filter paper according to claim 3 or 4 blocks torque holding meanss, which is characterized in that be provided in the swing arm
Card column, the drag hook spring are articulated in the card column.
6. filter paper according to claim 5 blocks torque holding meanss, which is characterized in that be provided with connection on the substrate
Column is provided with annular groove on the connecting pole, and the connecting pin of the drag hook spring is articulated in the annular groove.
7. filter paper according to claim 2 blocks torque holding meanss, which is characterized in that the drag hook spring is perpendicular to institute
State swing arm.
8. filter paper according to claim 1 blocks torque holding meanss, which is characterized in that the connecting hole runs through the band
Wheel, opening of the connecting hole close to belt wheel one end are provided with stepped hole, and one end of the connector extend into the step
Limiting section is formed in hole, is provided with card slot on the limiting section, clamp spring is provided in the card slot.
9. filter paper according to claim 8 blocks torque holding meanss, which is characterized in that be provided with lid on the belt wheel
Plate, the cover board snap onto on the stepped hole and close the stepped hole opening.
10. filter paper according to claim 1 blocks torque holding meanss, which is characterized in that fixation is arranged in the shaft
There are lantern ring, the torque spring to be socketed in the shaft and connect by lantern ring with shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721747847.1U CN207738176U (en) | 2017-12-14 | 2017-12-14 | Filter paper blocks torque holding meanss |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721747847.1U CN207738176U (en) | 2017-12-14 | 2017-12-14 | Filter paper blocks torque holding meanss |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207738176U true CN207738176U (en) | 2018-08-17 |
Family
ID=63118041
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721747847.1U Active CN207738176U (en) | 2017-12-14 | 2017-12-14 | Filter paper blocks torque holding meanss |
Country Status (1)
| Country | Link |
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| CN (1) | CN207738176U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107934628A (en) * | 2017-12-14 | 2018-04-20 | 杭州春来科技有限公司 | Filter paper blocks moment of torsion holding meanss |
| CN109176679A (en) * | 2018-08-30 | 2019-01-11 | 陈明亮 | A kind of transmission device of soft-package battery outer packing aluminum plastic film in punching press |
-
2017
- 2017-12-14 CN CN201721747847.1U patent/CN207738176U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107934628A (en) * | 2017-12-14 | 2018-04-20 | 杭州春来科技有限公司 | Filter paper blocks moment of torsion holding meanss |
| CN109176679A (en) * | 2018-08-30 | 2019-01-11 | 陈明亮 | A kind of transmission device of soft-package battery outer packing aluminum plastic film in punching press |
| CN109176679B (en) * | 2018-08-30 | 2020-08-28 | 宁波捷傲创益新材料有限公司 | Processing device for aluminum-plastic film of outer package of soft package battery in stamping |
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