CN109550534A - A kind of medicine spoon for accurate weighing sample-adding - Google Patents
A kind of medicine spoon for accurate weighing sample-adding Download PDFInfo
- Publication number
- CN109550534A CN109550534A CN201811485577.0A CN201811485577A CN109550534A CN 109550534 A CN109550534 A CN 109550534A CN 201811485577 A CN201811485577 A CN 201811485577A CN 109550534 A CN109550534 A CN 109550534A
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- Prior art keywords
- handle
- battery
- control
- spoon
- accurate weighing
- Prior art date
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- 239000003814 drug Substances 0.000 title claims abstract description 44
- 238000005303 weighing Methods 0.000 title claims abstract description 29
- 230000001105 regulatory effect Effects 0.000 claims abstract description 24
- 230000010355 oscillation Effects 0.000 claims abstract description 12
- 229910052744 lithium Inorganic materials 0.000 claims description 26
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical group [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 25
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 6
- 230000005611 electricity Effects 0.000 claims description 6
- 229910000652 nickel hydride Inorganic materials 0.000 claims description 6
- 230000001276 controlling effect Effects 0.000 claims description 2
- 229940079593 drug Drugs 0.000 description 7
- 238000010586 diagram Methods 0.000 description 5
- 239000000843 powder Substances 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 229910000838 Al alloy Inorganic materials 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- 239000003990 capacitor Substances 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 3
- 238000012864 cross contamination Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 239000004033 plastic Substances 0.000 description 3
- 229920003023 plastic Polymers 0.000 description 3
- 239000010935 stainless steel Substances 0.000 description 3
- 229910001220 stainless steel Inorganic materials 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 2
- 238000005284 basis set Methods 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 239000010936 titanium Substances 0.000 description 2
- 229910052719 titanium Inorganic materials 0.000 description 2
- 239000002023 wood Substances 0.000 description 2
- 229910003307 Ni-Cd Inorganic materials 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 210000000707 wrist Anatomy 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
- B01L3/00—Containers or dishes for laboratory use, e.g. laboratory glassware; Droppers
- B01L3/18—Spatulas
Abstract
The invention discloses a kind of medicine spoons for accurate weighing sample-adding, including spoon head, handle and the vibration device being mounted in handle internal cavity, the control device that handle internal cavity is additionally provided with regulating device and connect with vibration device and regulating device, the regulating device is for oscillation intensity needed for adjusting medicine spoon and to control device output regulation signal, control device adjusts the oscillation intensity of vibration device after being used to handle the adjustment signal received, to control the oscillation intensity of handle.The present invention is vibrated in accurate weighing powdered rubber by vibration device, is enhanced powdered rubber mobility, can easily be controlled powdered rubber feed rate and sample-adding amount, is unlikely to when weighing plus excessive, is greatly reduced and is repeated to weigh operation because sample-adding is excessive.
Description
Technical field
It is used when taking and weigh the present invention relates to a kind of powdered substance, it can be to avoid the chemical analysis of cross contamination
Equipment, specifically a kind of medicine spoon for accurate weighing sample-adding.
Background technique
In chemistry, in physical analysis laboratory, medicine spoon is used usually to take and weigh powdered substance, it is especially smart
When really weighing, one will accurately quickly, and two will prevent cross contamination.Common experimental procedure is: balance is got out, weighing container
(or pan paper) is put on balance on goods and services, and then, medication bale-out powdered rubber is added in container, when weight is close to be required, is used
Hand pats the wrist for holding spoon hand, is slowly added to powdered rubber in container to reach specified amount to Balance.When changing a product
When kind or lot number weigh, a medicine spoon is replaced, usually to prevent cross contamination.General powdered rubber has adhesiveness, be difficult from
Slowly flow down in medicine spoon, when especially close to required amount, very important person is control feed rate and sample-adding amount.But needing essence
When really weighing, for example it is accurate to milligram grade, this sample-adding action control just has sizable difficulty, often adds, just
Some powder are fetched, then are slowly loaded into weighing container, the amount until reaching requirement just can may be repeated several times, take
When and poor effect.
In view of the above-mentioned problems, Chinese invention patent (200910197731.9) discloses a kind of electric medicinal ladle, by spoon head and
Handle is constituted, and handle inner has cavity, and cavity is provided with the motor being connected with power supply.The patent can be according to the shake of handle itself
It is dynamic, allow drug to be more smoothly uniformly scattered.However the electric medicinal ladle can only maintain a kind of vibration frequency when in use, it cannot basis
The actual demand of user carrys out the shockproofness of regulation handle, controls feed rate and sample-adding amount, still can ground overload, do
Less than accurate control.Furthermore the spoon head of the electric medicinal ladle and handle are non-dismountable, also need in addition to replace when need to change the spoon
Entire medicine spoon cleans again, and operation is still inconvenient.
Summary of the invention
The object of the present invention is to provide a kind of medicine spoons, can freely adjust the oscillation intensity of medicine spoon, make powder sample from
The speed fallen on medicine spoon is controlled, so that accurate weighing be better achieved.
A kind of medicine spoon for accurate weighing sample-adding, including spoon head, handle and the vibration being mounted in handle internal cavity
Dynamic device, the control device that handle internal cavity is additionally provided with regulating device and connect with vibration device and regulating device are described
For oscillation intensity needed for adjusting medicine spoon and to control device output regulation signal, control device is used for reception regulating device
To adjustment signal handled after adjust vibration device oscillation intensity, to control the oscillation intensity of handle.
Preferably, the control device includes control circuit board, charging circuit device and rechargeable battery, the charging circuit
Device is integrated in control circuit board, and charging circuit device is rechargeable battery charging, and rechargeable battery is control circuit board, vibration dress
It sets and powers with regulating device.The control circuit board is connect with regulating device, for receiving the adjustment signal and warp of regulating device
It crosses after handling and adjusts the oscillation intensity of vibration device.
Preferably, the control device includes control circuit board, and is the control circuit board, vibration device and adjusting
The disposable battery of device power supply.The control circuit board is connect with the vibration device, for receiving the adjusting of regulating device
Signal and the oscillation intensity for adjusting vibration device after treatment.
Preferably, the regulating device is pressure sensor, variable resistance or potentiometer.
Preferably, the vibration device is vibrating motor, vibration electromagnet.
Preferably, the handle internal cavity is equipped with clutch locking system, and the spoon head is real by the clutch locking system
Now it is connect with handled telescopic.
Preferably, the clutch locking system is arranged in this way: handle is connect with a lever rotation and lever one end is solid
Surely there is a button, which stretches out from intracavity of handle, is further fixed on bullet between the lever end and handle of button the same end
Spring a；Handle the other end has a hook part, and the hook part is mutually chimeric with the wedge groove that spoon head tail portion has, and spoon head tail portion is also logical
Spring b is crossed to be fixedly connected with handle.
Preferably, the rechargeable battery is lithium rechargable battery, nickel hydride charging pond, ni-Cd rechargable battery or lead battery；Described one
Secondary property battery is dry cell, lithium battery, alkaline battery, button cell or layer-built battery.
Preferably, the control circuit includes time-base integrated circuit and linear motor control integrated circuit, the charging electricity
Road device be lithium battery charge control integrated circuit, the lithium battery charge control integrated circuit by rechargeable battery with when basis set
At circuit, linear motor control integrated circuit and regulating device electrical connection, time-base integrated circuit and the integrated electricity of linear motor control
Road and regulating device electrical connection, linear motor control integrated circuit are connect with motor.Wherein, the time-base integrated circuit is 555
Time-base integrated circuit, it is that NM5303 linear motor controls integrated circuit, lithium battery charge control that linear motor, which controls integrated circuit,
Integrated circuit model is lithium battery charge control integrated circuit TP4056.The control circuit is mainly by basis set at 2 piece 555 at electricity
Road and one piece of NM5303 linear motor control integrated circuit composition and lithium battery charge control integrated circuit TP4056 are constituted.
Preferably, the spoon head shape can be the shapes such as round, rectangular, infundibulate, triangle.
For above-mentioned purpose, technical solution provided by the invention are as follows:
The rechargable battery is lithium rechargable battery, nickel hydride charging pond, ni-Cd rechargable battery or lead battery
The vibration device can be vibrating motor (including linear motor, eccentric rotor motor).
The present invention be it is a kind of by finger pressure control oscillation intensity, can be convenient more dressing spoon, accurate weighing may be implemented
Equipment.Medicine spoon is replaceable, there is medicine spoon clutch locking system in handle, realizes medicine-feeding spoon by the way that medicine spoon is inserted into handle, passes through
Medicine spoon is unloaded in pressing Isolating Switch realization.Medicine spoon can there are many shape, such as round, rectangular, infundibulate, triangle shape, materials
Material can be plastics, stainless steel, aluminium alloy, copper, titanium, wood etc..Pressure sensor is also equipped in handle, and (can also use can power transformation
Resistance, potentiometer etc.), circuit board, vibrating motor, rechargable battery, charging unit.When being weighed using this equipment, by the finger of this equipment
It pinches at pressure sensor position, finger pressure strong and weak signals can be switched to electric signal and be transmitted to control circuit board by pressure sensor,
After circuit board is handled by electronics such as integrated circuits without part, variable electric signal can be generated, electric signal is output on vibrating motor,
Handle is set to generate variable vibration force, the vibration force of power variation can make powdered rubber mobility change, to realize essence
Really weigh.Control circuit provides power supply by built-in rechargable battery, and rechargable battery can be lithium rechargable battery, nickel hydride charging pond, ni-Cd charging
Pond, lead battery etc. can also use the power supply such as dry cell, lithium battery, alkaline battery, button cell, layer-built battery.Cell voltage
It can be with 1 volt to 24 volts.Rechargable battery can use direct current, exchange electrical connection charging.Charging voltage can be 1 volt to 24 volts.
Charging circuit is integrated into control circuit board, and handle is put on charging base, can be charged for rechargable battery.
A kind of structure composition of the medicine spoon for accurate weighing sample-adding: such as Fig. 1
Including medicine spoon, handle；Medicine spoon is freely gone up from handle, is unloaded in which can be convenient, and handler is mounted on handle on medicine spoon
It is interior, it is a self-locking device, by pressing a medicine spoon, medicine spoon can be locked on handle；An Isolating Switch is pressed again, it can
To unload prescribe medicine spoon, reach more dressing spoon purpose.
Medicine spoon can be made of materials such as stainless steel, plastics, wood, titanium, copper, aluminium alloys.
Handle is provided with vibrating motor, pressure sensor, control circuit board, lithium rechargable battery (be also possible to nickel hydride charging pond,
Ni-Cd rechargable battery, lead battery etc.), charging circuit device.Cell voltage is 1 volt to 24 volts, and 3 to 5 volts are best.
When using this equipment, the power of pressure is switched to electric signal by finger compression sensor, sensor, reaches control circuit
Plate after circuit board is by processing, exports the electric signal changed with pressure size, reaches vibrating motor, realizes motor vibrations dynamics
Variation, to control powder feed rate and sample-adding amount size.Above-mentioned control circuit board provides power supply, charging unit by rechargable battery
For rechargable battery charging.5 volts of DC power supplies are inserted into when charging to USB.
Compared with prior art, the medicine have the advantages that 1) present invention passes through vibration in accurate weighing powdered rubber
Device vibration, enhances powdered rubber mobility, can easily control powdered rubber feed rate and sample-adding amount, not when weighing
As for excess is added, greatly reduces and repeat to weigh operation because being loaded excessively；2) regulating device in the present invention, such as pressure sensing
Device, can be adjusted the pressure change of pressure sensor by finger pressure, and pressure sensor can switch to finger pressure strong and weak signals
Electric signal, which is transmitted to control circuit board, can generate variable electric current after circuit board is handled by electronics such as integrated circuits without part, electricity
Stream is output on vibrating motor, and handle is made to generate variable vibration force, and the vibration force of power variation can make powdered rubber mobility
It changes, to control powder feed rate and sample-adding amount size, realizes accurate weighing；3) present invention built in rechargable battery and
Charging circuit device, can be with filling with very easy to use；4) spoon head of the invention and handle are detachable, by handle
The clutch locking system of setting can freely replace spoon head, and one sample of every weighing can more renew spoon head, can effectively prevent friendship
Fork pollution.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the embodiment of the present invention 1；
Fig. 2 is the structural schematic diagram (the clutch locking system in figure is not drawn specifically) of another embodiment of the present invention；
Fig. 3 is the structural schematic diagram of the clutch locking system in the embodiment of the present invention；
Fig. 4 is the control circuit schematic diagram of the embodiment of the present invention 1.
Appended drawing reference: 101,201-spoon head, 102,202- vibrating motor, 103,203-handles, 104,204-Clutch locks
Locking apparatus, 105- button, 106- pressure sensor, 206- variable resistance, 107 control circuit boards (have charging circuit device),
207- control circuit board, 108- lithium rechargable battery, 208- alkaline dry battery.
Specific embodiment
The present invention will be further explained below with reference to the attached drawings:
Embodiment 1
As shown in Figure 1, a kind of medicine spoon for accurate weighing sample-adding, including spoon head 101, handle 103, the handle
There is a cavity along its length, which is equipped with clutch locking system, it is a self-locking device, and spoon head is logical inside 103
Cross the detachable connection of clutch locking system realization and handle.Vibration horse is also equipped in the internal cavities of the handle 103
Up to 102, pressure sensor 106, control circuit board 107, charging circuit device, lithium rechargable battery 108 and USB socket 109.
The charging circuit device is integrated in control circuit board 107, the control circuit board 107 respectively with vibrating motor
102, pressure sensor 106, lithium rechargable battery 108 and 5 volts of USB sockets 109 connect；Charging circuit device is located at control circuit board
Inside, and charge for lithium rechargable battery 108.Cell voltage is 1 volt to 24 volts, and 3 volts to 5 volts best.107 electricity of control circuit board
Road schematic diagram such as Fig. 4.Circuit operation principle: IC1TP4056 is specialized lithium battery management integrated circuit, is responsible for lithium battery charging valve
Reason, external 5 volts of DC power supplies are connected to the 4th of IC1 the, 8 feet, and lithium battery anode connects in the 5th foot of IC1, and the 7th foot of IC1 connects charging instruction
LED, TC1 the 1st, 3 is grounded.IC2, IC3, IC4 composition control circuit, IC2, IC3 are time-base integrated circuits, the 4th, 8 feet be power supply
Anode, the 1st foot ground connection.The working power of IC2, IC3, IC4 are provided by lithium battery by connecting switch.IC2 time-base integrated circuit
As 1:1 square-wave signal generation circuit, frequency is determined by resistance R3, R4, capacitor C1, frequency f=0.693 (R3+2R4) C1, figure
The frequency of middle circuit about 48KHz.The square-wave signal that IC2 time-base integrated circuit generates arrives IC3 time-base integrated circuit the 2nd through C3 is defeated
Foot forms duty cycle square wave control circuit, pressure sensor by IC3 time-base integrated circuit, R6, capacitor C5, resistance R5, capacitor C4
The duty ratio that the resistance value size variation of R6 can control square wave changes from 0-100%, and signal is output to IC4 from the 3rd foot of IC3 again
3rd foot, IC4NM5303 are motor control circuits, are the signal that 0-100% changes from the 3rd foot input duty cycle, can be from the 9th, 12
The variable current signal of foot output is with the size variation of drive motor operating dynamics.
Be integrated with charging circuit device in the control circuit board 107, the charging circuit device by USB socket 109 with
Extraneous power supply connection, charges to the lithium rechargable battery 108 being attached thereto, lithium rechargable battery 108 and pressure sensor 106, vibration
Motor 102 and control circuit board 107 connect, and are powered for this three.Pressure sensor 106 is mounted in handle internal cavity
A suitable position, when using medicine spoon, finger presses handle 103, and then press pressure sensor 106, pressure sensor
The power of 106 pressure is converted to electric signal transmission to control circuit board 107, after control circuit board 107 is by processing, output with
The electric current of pressure size variation, and vibrating motor 102 is reached, to realize the variation of the vibration intensity of vibrating motor 102, finally
Control the powder feed rate of medicine spoon and the size of sample-adding amount.
The clutch locking system, internal structure such as Fig. 3, device are arranged in this way: the middle part of handle 103 and a lever
There is fixing axle in position, and lever can be with pivoting, and lever one end is fixed with a button, which stretches from intracavity of handle
Out, the lever lower part of button the same end is further fixed on spring a；The lever other end has a hook, the contract which has with spoon head tail portion
Connected in star is mutually fitted into, and there are also a spring b to head on for 101 tail portion of spoon head, and spring b is fixedly connected with handle；When the spoon with wedge groove
In head insertion clutch locking system, spoon head can hook lever by the band in clutch locking system and lock, and hook the wedge of insertion spoon head
In groove, band hooks lever and is suppressed by spring a reaction force, is not spoon head and falls off.When needing spoon head to disengage, click by
Button makes to hook the wedge groove for leaving spoon head with lever motion is hooked, meanwhile, spoon head is ejected clutch locking under the action of spring b
Device realizes that spoon head is separated with handle, push-button reset.The clutch locking system whole device can be made of metal material,
It can be the materials such as stainless steel, iron, aluminium alloy, copper, plastics.
In the present embodiment, the lithium rechargable battery 108 can also be nickel hydride charging pond, ni-Cd rechargable battery, lead battery
Deng；Pressure sensor 106 can be diaphragm pressure strain resistor, finally control to adjust vibration by changing the size of resistance value
The vibration intensity of motor.
In another embodiment, as shown in Fig. 2, the embodiment is roughly the same with the structure of embodiment 1, institute is not
With control circuit board 207 does not have charging circuit device, which directly connects with alkaline dry battery 208
It connects, alkaline dry battery 208 is control circuit board 207, vibration device and regulating device power supply, and the regulating device is variable resistance
206, the vibration device is vibrating motor 202.It is strong come the vibration for finally controlling vibrating motor by adjusting variable resistance 206
Degree.
Claims (10)
1. a kind of medicine spoon for accurate weighing sample-adding, including spoon head, handle and the vibration being mounted in handle internal cavity
Device, it is characterised in that: the control that handle internal cavity is additionally provided with regulating device and connect with vibration device and regulating device
Device, the regulating device is for oscillation intensity needed for adjusting medicine spoon and to control device output regulation signal, control device
For adjusting the oscillation intensity of vibration device after handling the adjustment signal received, so that the vibration for controlling handle is strong
Degree.
2. a kind of medicine spoon for accurate weighing sample-adding according to claim 1, it is characterised in that: the control device
Including control circuit board, charging circuit device and rechargeable battery, the charging circuit device is integrated in control circuit board, charging
Circuit device is rechargeable battery charging, and rechargeable battery is control circuit board, vibration device and regulating device power supply.
3. a kind of medicine spoon for accurate weighing sample-adding according to claim 1, it is characterised in that: the control device
It including control circuit board, and is the disposable battery of the control circuit board, vibration device and regulating device power supply.
4. a kind of medicine spoon for accurate weighing sample-adding according to claim 1 or 2 or 3, it is characterised in that: the tune
Regulating device is pressure sensor, variable resistance or potentiometer.
5. a kind of medicine spoon for accurate weighing sample-adding according to claim 1 or 2 or 3, it is characterised in that: the vibration
Dynamic device is vibrating motor, vibration electromagnet.
6. a kind of medicine spoon for accurate weighing sample-adding according to claim 1, it is characterised in that: the handle inner
Cavity is equipped with clutch locking system, and the spoon head is connect by clutch locking system realization with handled telescopic.
7. a kind of medicine spoon for accurate weighing sample-adding according to claim 6, it is characterised in that: the clutch locking
Device is arranged in this way: handle is connect with a lever rotation and lever one end is fixed with a button, and the button is from intracavity of handle
Spring a is further fixed between middle stretching, and the lever end and handle of button the same end；Handle the other end has a hook part,
The hook part is mutually chimeric with the wedge groove that spoon head tail portion has, and spoon head tail portion also passes through spring b and is fixedly connected with handle.
8. a kind of medicine spoon for accurate weighing sample-adding according to claim 2 or 3, it is characterised in that: the charging
Battery is lithium rechargable battery, nickel hydride charging pond, ni-Cd rechargable battery or lead battery；The disposable battery be dry cell, lithium battery,
Alkaline battery, button cell or layer-built battery.
9. a kind of medicine spoon for accurate weighing sample-adding according to claim 2, it is characterised in that: the control circuit
Integrated circuit is controlled including time-base integrated circuit and linear motor, the charging circuit device is the integrated electricity of lithium battery charge control
Road, the lithium battery charge control integrated circuit control integrated circuit by rechargeable battery and time-base integrated circuit, linear motor
It is electrically connected with regulating device, time-base integrated circuit controls integrated circuit with linear motor and regulating device is electrically connected, linear motor
Control integrated circuit is connect with motor.
10. a kind of medicine spoon for accurate weighing sample-adding according to claim 3, it is characterised in that: the spoon head
Shape can be the shapes such as round, rectangular, infundibulate, triangle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811485577.0A CN109550534A (en) | 2018-12-06 | 2018-12-06 | A kind of medicine spoon for accurate weighing sample-adding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811485577.0A CN109550534A (en) | 2018-12-06 | 2018-12-06 | A kind of medicine spoon for accurate weighing sample-adding |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109550534A true CN109550534A (en) | 2019-04-02 |
Family
ID=65868928
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811485577.0A Pending CN109550534A (en) | 2018-12-06 | 2018-12-06 | A kind of medicine spoon for accurate weighing sample-adding |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109550534A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112403548A (en) * | 2020-11-04 | 2021-02-26 | 安徽理工大学 | Multifunctional accurate weighing sampling medicine spoon for laboratory |
| CN113745613A (en) * | 2021-08-04 | 2021-12-03 | 深圳市贝特瑞新能源技术研究院有限公司 | Membrane electrode, preparation method thereof and fuel cell |
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2018
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112403548A (en) * | 2020-11-04 | 2021-02-26 | 安徽理工大学 | Multifunctional accurate weighing sampling medicine spoon for laboratory |
| CN113745613A (en) * | 2021-08-04 | 2021-12-03 | 深圳市贝特瑞新能源技术研究院有限公司 | Membrane electrode, preparation method thereof and fuel cell |
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