CN104622049B - A kind of electromagnetic levitation type intelligent drawer and its operation method - Google Patents
A kind of electromagnetic levitation type intelligent drawer and its operation method Download PDFInfo
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- CN104622049B CN104622049B CN201310548108.XA CN201310548108A CN104622049B CN 104622049 B CN104622049 B CN 104622049B CN 201310548108 A CN201310548108 A CN 201310548108A CN 104622049 B CN104622049 B CN 104622049B
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Abstract
The present invention is applied to life appliance field, a kind of electromagnetic levitation type intelligent drawer and its operation method are provided, the drawer includes drawer body and the casing being engaged with the drawer body, the binding site of the drawer body and the casing, side has been provided with the guide rail of positioning and guide effect, opposite side is provided with linear electric motors, and the drawer also includes the power-supply system being connected with the linear electric motors.The present invention is used as power source using linear electric motors, power-supply system exports alternating current to linear electric motors, under linear electric motors drive, drawer body outwardly or inwardly slides along guide rail, linear electric motors to drawer body active force evenly, and energy decline situation is not present, it is substantially noiseless in use.The present invention provides a kind of intelligentized drawer, and drawer body is in moment state of a control and adaptive state, realizes its steady quiet efficiently reciprocal running, effectively reduces noise.
Description
Technical field
The invention belongs to life appliance field, more particularly to a kind of electromagnetic levitation type intelligent drawer and its operation method.
Background technology
The existing drawer of in the market does not have dynamical system typically, for the drawer with dynamical system, mainly with spring（With
Based on compression spring and torsion spring）Power of the elastic force as drawer, be used as the guiding and kinetic system of drawer by roller or slide rail
System.Spring（Including compression spring and torsion spring）Power resources in mechanical potential, there is failure progression, and active force is uneven
It is even.Roller type guiding mechanism is simple in construction, but noise is larger.Slide rail type guiding mechanism has larger improvement to noise problem,
But oil pollution be present, equally also deposit some noises.
The content of the invention
In view of the above problems, it is an object of the invention to provide a kind of electromagnetic levitation type intelligent drawer and its operation method, purport
Solving existing drawer, acting force of the spring is uneven in use, easy exhaustion.The big technical problem of noise.
On the one hand, the electromagnetic levitation type intelligent drawer includes drawer body and the case being engaged with the drawer body
Body, the binding site of the drawer body and the casing, side have been provided with the guide rail of positioning and guide effect, opposite side peace
Equipped with linear electric motors, the drawer also includes the power-supply system being connected with the linear electric motors.
Further, the linear electric motors include stator and rotor, and one of them is installed on drawer body, another installation
In in the casing, the rotor engagement is arranged on the stator, can be relative in power-supply system driving lower rotor part stator
Slide.
Further, the rotor includes the permanent magnet being arranged in order, adjacent permanent magnet opposite polarity, and the stator is
Power electromagnetism group, including the electromagnet being arranged in order, adjacent magnet spool is around on the contrary, all coils connection in sequential series.
Further, the stator also includes being used for the first set winding that critical localisation starts.
Further, the stator also includes being used for the second spacing set winding, when the drawer body is in complete
During closure state, the tail end permanent magnet body of rotor described in the second set winding face.
On the other hand, the operation method of the electromagnetic levitation type intelligent drawer comprises the steps：
In the case where drawer body is in fully closed condition, linear electric motors drive drawer body edge under power-supply system driving
Guide rail to slide in and out until opening completely；
In the case where drawer body is in full open position, when the drawer body is by extraneous thrust, linear electric motors exist
Under power-supply system driving, drawer body is driven along guide rail slid inward until closing completely.
Further, the linear electric motors drive drawer body to be slid in and out directly along guide rail under power-supply system driving
To complete opening steps, specifically include：
Power-supply system loads alternating current to the coil of power electromagnetism group, and whether the second set winding of detection has curent change,
Alternating current is persistently loaded if having curent change so that drawer body slides in and out, and otherwise carries out phase to the alternating current of loading
Skew, change the relative glide direction of rotor and stator；
The curent change of the first set winding is detected, when electric current persistently changes, continues to add the coil of power electromagnetism group
Carry alternating current so that rotor continues to slide relatively with stator, when no current in the first set winding, changes alternating current
Frequency causes stator and rotor geo-stationary.
Further, the power-supply system loads alternating current to the coil of power electromagnetism group, and the second set winding of detection is
It is no to have curent change, alternating current is persistently loaded if having curent change so that drawer body slides in and out, otherwise to the friendship of loading
Stream electricity carries out phase offset, before the relative glide direction step for changing rotor and stator, in addition to：
Power-supply system loads short-time current to the first set winding, makes rotor and the relative slip of stator progress critical to depart from
State.
Further, the linear electric motors drive drawer body straight along guide rail slid inward under power-supply system driving
To complete closure step, specifically include：
Electric current in the coil of power electromagnetism group is detected, after discovery has curent change, power-supply system is to power electromagnetism group
Coil persistently loads the alternating current that can make its return；
The electric current in the second set winding is detected, after finding to have curent change, power-supply system changes loaded exchange
The state of electricity, stator is set to be in relative static conditions with rotor.
Further, the alternating current is square wave alternating-current electricity.
The beneficial effects of the invention are as follows：Electromagnetic levitation type intelligent drawer provided by the invention using linear electric motors as power source,
Power-supply system exports alternating current to linear electric motors, and under linear electric motors drive, drawer body outwardly or inwardly slides along guide rail,
With it is existing using spring as the drawer of power source compared with, drawer body active force evenly, and is not present linear electric motors
Energy decline situation, it is substantially noiseless in use, the situation for the people that occurs wounding during drawer body ejection is avoided, simultaneously
High-speed impact during drawer backhaul is it also avoid, the present invention provides a kind of intelligentized drawer, and drawer body is in moment control
State and adaptive state, its steady quiet efficiently reciprocal running is realized, effectively reduces noise.
Brief description of the drawings
Fig. 1 is the structure of electromagnetic levitation type intelligent drawer provided in an embodiment of the present invention；
Fig. 2 is the left side structure of drawer body provided in an embodiment of the present invention；
Fig. 3 is the right side structure of drawer body provided in an embodiment of the present invention；
Fig. 4 is structure of the linear motion actuator provided in an embodiment of the present invention；
Fig. 5 is the first schematic diagram that electromagnet and permanent magnet are in misaligned state；
Fig. 6 is second of schematic diagram that electromagnet and permanent magnet are in misaligned state；
Fig. 7 is the work enlarged drawing of electromagnet, permanent magnet；
Fig. 8 is the first schematic diagram that electromagnet and permanent magnet are in critical condition；
Fig. 9 is second of schematic diagram that electromagnet and permanent magnet are in critical condition；
Figure 10 is the flow chart of electromagnetic levitation type intelligent drawer operation method provided in an embodiment of the present invention；
Figure 11 is the flow chart of step S101 in Figure 10；
Figure 12 is the flow chart of step S102 in Figure 10.
Embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, it is right below in conjunction with drawings and Examples
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
In order to illustrate technical solutions according to the invention, illustrated below by specific embodiment.
Fig. 1 shows the structure of electromagnetic levitation type intelligent drawer provided in an embodiment of the present invention, and Fig. 2 and Fig. 3 are respectively illustrated
The left side structure and right side structure of drawer body, illustrate only the part related to the embodiment of the present invention for convenience of description.
Reference picture 1- Fig. 3, the present embodiment provide electromagnetic levitation type intelligent drawer include drawer body 1 and with the drawer
The casing 2 of this mates, the binding site of the drawer body 1 and the casing 2, side, which has been provided with positioning and has been oriented to, to be made
Guide rail 3, opposite side are provided with linear electric motors 4, and the drawer also includes the power-supply system being connected with the linear electric motors（Figure
Not shown in）, in Fig. 2, the guide rail 3 is installed on the left of drawer body, and in Fig. 3, the linear electric motors 4 are installed on drawer body
Right side, guide rail can be also installed on certainly on the right side of drawer body, linear electric motors are installed on the left of drawer body.
The power-supply system provides alternating current to linear electric motors, and frequency, amplitude, the phase of alternating current are adjustable, alternating current
Action time can also arbitrarily be set according to actual conditions.Under power-supply system effect, the linear electric motors 4 can drive
Drawer body 1 is along the guide rail 3 in the inside and outside slip of casing 2.In the present embodiment, power source of the linear electric motors as drawer, only
Want under power-supply system normal work, in the absence of energy decline, it is ensured that drawer normal work all the time.On the other hand, due to straight
Line motor uses magnetic suspension principle so that drawer body is when sliding, substantially without noise, overcome existing drawer in use,
The problem of noise is big.
Structure of the linear motion actuator shown in reference picture 4, the linear electric motors 4 include stator 41 and rotor 42, one of peace
Loaded on drawer body, another is installed in the casing, and the rotor engagement is arranged on the stator, in the power supply system
System driving lower rotor part stator relative can slide.The rotor 42 is installed on drawer body, and the stator 41 is installed on the case
In vivo.
The rotor 42 includes the permanent magnet being arranged in order, and adjacent permanent magnet opposite polarity, the stator 41 is power electric
Magnetic group, including the electromagnet being arranged in order, adjacent magnet spool is around on the contrary, all coils connection in sequential series.Straight line
The operation principle of motor is the same with the principle of propeller of magnetic suspension train, by adjusting action time and the direction of electromagnet current,
Electromagnet on stator is produced corresponding magnetic force, the magnetic field interaction with the permanent magnet on rotor, produce directed forces, push away
Dynamic rotor motion, the operation principle of linear electric motors is specifically described referring to Fig. 5-Fig. 9.
Fig. 5 and Fig. 6 shown after coil indirect current in power electromagnetism group, presented two kinds of electromagnet 411
Polarization state, it is illustrated that in the electromagnet of opposed polarity is represented with "+" and "-", be connected with alternating current, the pole of same electromagnet in coil
Property be arranged in order toward complex Alternating, permanent magnet 421, the polarity of adjacent permanent magnet is different.In Fig. 5 and Fig. 6, there are N+1 electromagnet, N
For odd number, N size is configured according to the length of actual use and the active force of needs.Wherein the 1st, the 3rd ..., N
Individual magnet spool around to identical, the 2nd, the 4th ..., the N+1 magnet spool around to identical, two groups
Coil is overall to be formed two groups of electromagnet, can produce two kinds of synchronous reverse magnetic force around on the contrary, using series system, from 1 to
N+1 electromagnet composition power electromagnetism group, is main power source.When the position relationship of electromagnet and permanent magnet such as Fig. 5 or Fig. 6 institutes
Specific alternating current is inputted when showing, in electromagnet coil can make to produce mutual suction and repulsive force between rotor and stator,
Make relative motion occurs between rotor and stator.Electromagnet, the permanent magnet enlarged drawing shown in reference picture 7 are made a concrete analysis of, now electromagnetism
Iron and permanent magnet are misaligned state, it is assumed that being passed through a certain the moment electromagnet 411 and permanent magnet 421 of alternating current as shown in fig. 7,
The polarity of electromagnet is "+", and the polarity of left side permanent magnet is "+", and the polarity of the right permanent magnet is "-", under such a state, electricity
Magnet produces thrust to left side permanent magnet, produces attraction to the right permanent magnet, such electromagnet can drive rotor is to the left
Slideslip, if in the figure 7, the polarity of electromagnet is "-", and the polarity of left side permanent magnet is "+", and the polarity of the right permanent magnet is
"-", such electromagnet can drive rotor Slideslip to the right.
When rotor is in sliding process, it may appear that critical condition as shown in Figure 8 and Figure 9, now electromagnet is to permanent magnet
Neither produce thrust nor produce attraction, but because previous rotor slides on stator, be used to according to the motion of rotor
Property, even if without thrust and attraction, rotor still may proceed to slide so that electromagnet and permanent magnet are in misaligned state, so as to
Critical point is crossed, continues to slide.
If in an initial condition, rotor and stator are in critical condition as shown in Figure 8 and Figure 9, now directly to dynamic
The coil input AC electricity of power electromagnetism group, can not make rotor produce motion, in order to solve this problem, as a kind of preferable
Embodiment, the stator also include being used for the first set winding 412 that critical localisation starts, first set winding 412
Misplace and place with permanent magnet under critical conditions, particular location is placed according to actual conditions, can independently placed, can also put
Put in electromagnet coil, when being passed through short-time current in the first set winding 412, the first set winding 412 produces a certain pole
Property magnetic force, thrust or attraction are produced to permanent magnet so that rotor, which has, starts initial velocity, after rotor starts slip, turns
Son, stator dislocation, state, power electromagnetism group coil input AC electricity, can cause rotor persistently to slide as shown in Figure 5 and Figure 6.
A kind of preferred embodiment is further used as, the stator also includes being used for the second spacing set winding 413, when
When the drawer body is in fully closed condition, the tail end permanent magnet body of rotor described in the face of the second set winding 413.When
When drawer body is in fully closed condition, alternating current is persistently loaded to power electromagnetism group coil, detects the second set winding 413
Inside whether there is curent change, when there is curent change, illustrate the set winding of permanent magnet magnetic force wire cutting second of Rotor terminal
413, now stator rotor produces slides relatively, represents that drawer body slides in and out, now persistently loads alternating current, make drawer sheet
Body continues to slide out.If there is no curent change in the second set winding 413, illustrate that drawer body is constantly in complete closure
The direction of relative movement of state, carry out phase offset of the power-supply system to loaded alternating current, change rotor and stator so that turn
Son has an active force inwardly moved, ensures the adaptation that drawer body is closed, will not arbitrarily slide in and out.Work as drawer body
When having open mode to reset closure, when drawer body closes completely, now Rotor terminal permanent magnet magnetic force wire cutting second
Set winding 413, therefore when detecting that the second set winding 413 has curent change, illustrate that now drawer body closes completely
Close, power-supply system changes the state of loaded alternating current, stator is in relative static conditions with rotor.
Figure 10 shows the flow of the operation method of electromagnetic levitation type intelligent drawer provided in an embodiment of the present invention, the drawer
For foregoing electromagnetic levitation type intelligence, the part related to the embodiment of the present invention is illustrate only for convenience of description.
The operation method for the electromagnetic levitation type intelligent drawer that the present embodiment provides comprises the steps：
Step S101, in the case where drawer body is in fully closed condition, linear electric motors under power-supply system driving, take out by drive
Drawer body is slid in and out along guide rail until opening completely；
Step S102, in the case where drawer body is in full open position, when the drawer body is by extraneous thrust, directly
Line motor drives drawer body along guide rail slid inward until closing completely under power-supply system driving.
In the present embodiment, power-supply system gives linear electric motors alternating current, and as a kind of embodiment, the alternating current is square wave
Alternating current, frequency, amplitude, the phase of alternating current are adjustable, and the action time of alternating current can also arbitrarily set according to actual conditions
Put, the power-supply system driving under, when drawer body be closed mode, linear electric motors drive drawer body along guide rail to
It is interior to slide until closing completely；When drawer body is in full open position, user touches lower drawer body, linear electric motors band
Dynamic drawer body is along guide rail slid inward until closing completely.Because linear electric motors are using magnetic suspension principle so that take out
Drawer body is when sliding, and substantially without noise, overcomes existing drawer in use, the problem of big noise.As long as also, power supply system
Under normal work of uniting, in the absence of energy decline, it is ensured that drawer normal work all the time.
Specifically, as shown in figure 11, the step S101 includes：
Step S111, power-supply system loads alternating current to the coil of power electromagnetism group, and whether the second set winding of detection has
Curent change, alternating current is persistently loaded if having curent change so that drawer body slides in and out, otherwise to the alternating current of loading
Phase offset is carried out, changes the relative glide direction of rotor and stator；
Step S112, the curent change of the first set winding is detected, when electric current persistently changes, is continued to power electromagnetism group
Coil loading alternating current so that rotor and stator continue it is relative slide, when no current in the first set winding, change
The frequency of alternating current causes stator and rotor geo-stationary.
In the present embodiment, the second set winding plays position-limiting action, when the drawer body is in fully closed condition,
The tail end permanent magnet body of rotor described in the second set winding face.In step S111, power-supply system is to power electromagnetism group
After coil loading alternating current, the electric current in the second set winding is detected first, when finding to have electric current, illustrates Rotor terminal forever
The set winding of magnet magnetic force line cutting second, now stator rotor produces slides relatively, represents that drawer body slides in and out, continues
Alternating current is loaded, continues to slide out drawer body.If there is no curent change in the second set winding, illustrate drawer body
It is constantly in fully closed condition, carry out phase offset of the power-supply system to loaded alternating current, the phase of change rotor and stator
To the direction of motion so that rotor has an active force inwardly moved, ensures the adaptation that drawer body is closed, will not be with purpose
Outer slip.During drawer body slides in and out, the curent change of the first set winding is detected, when electric current persistently changes,
Illustrate that the permanent magnet magnetic line of force persistently cuts the first set winding, drawer body does not arrive full open position also, now continues to dynamic
The coil loading alternating current of power electromagnetism group so that rotor and stator continue with respect to sliding, when in the first set winding without electricity
During stream, illustrate that drawer body has arrived full open position, the frequency for now changing alternating current causes stator and rotor geo-stationary.
As a kind of preferred embodiment, also include before the step S111：
Step S110, power-supply system loads short-time current to the first set winding, rotor and stator is carried out relative slide
To depart from critical condition.
Under reset condition, if rotor and stator are exactly in critical condition as shown in Figure 8 and Figure 9, now electromagnetism
Iron neither produces thrust to permanent magnet nor produces attraction, directly the coil input AC electricity to power electromagnetism group, and being can not
Rotor is produced motion, it is preferred, therefore, that power-supply system loads short-time current to the first set winding, make rotor and stator
Carry out relative slide to depart from critical condition.
Specifically, as shown in figure 12, the step S102 includes：
Step S121, electric current in the coil of power electromagnetism group is detected, after discovery has curent change, power-supply system is to power
The coil of electromagnetism group persistently loads the alternating current that can make its return；
Step S122, the electric current in the second set winding is detected, after finding to have curent change, added by power-supply system change
The state of the alternating current of load, stator is set to be in relative static conditions with rotor.
When user needs to close drawer body, user touches drawer body, and now the permanent magnet magnetic line of force on rotor is cut
The coil of power electromagnetism group is cut, therefore curent change is had in coil, now power-supply system continues to the coil of power electromagnetism group
Loading can make the alternating current of its return.During drawer body return, the electric current in the second set winding is detected, when discovery has
After curent change, illustrate the set winding of permanent magnet magnetic force wire cutting second of Rotor terminal, show that the drawer body is complete
Complete closure, now, power-supply system change the state of loaded alternating current, stator is in relative static conditions with rotor.
To sum up, the embodiments of the invention provide a kind of electromagnetic levitation type intelligent drawer, the drawer using linear electric motors as power source,
It can be used for various occasions, can both make common drawer, money box, safety cabinet etc. can also be made, as long as employ linear electric motors
Drawer is within protection scope of the present invention.
Can be with it will appreciated by the skilled person that realizing that all or part of step in above-described embodiment method is
The hardware of correlation is instructed to complete by program, described program can be stored in a computer read/write memory medium
In, described storage medium, such as ROM/RAM, disk, CD.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, although with reference to foregoing reality
Apply example the present invention has been carried out relatively to be described in detail, for those skilled in the art, it still can be to foregoing each reality
The technical scheme described in example is applied to modify or carry out equivalent substitution to which part technical characteristic.It is all the present invention
All any modification, equivalent and improvement made within spirit and principle etc., should be included in the scope of the protection.
Claims (10)
1. a kind of electromagnetic levitation type intelligent drawer, the drawer includes drawer body and the case being engaged with the drawer body
Body, it is characterised in that the binding site of the drawer body and the casing, side have been provided with leading for positioning and guide effect
Rail, opposite side are provided with linear electric motors, and the drawer also includes the power-supply system being connected with the linear electric motors；In the power supply
Under systemic effect, the linear electric motors can drive drawer body to be slided along the guide rail inside and outside casing；
In the case where drawer body is in fully closed condition, linear electric motors drive drawer body along leading under power-supply system driving
Rail is slid in and out until opening completely；
In the case where drawer body is in full open position, when the drawer body is by extraneous thrust, linear electric motors are in power supply
Under system drive, drawer body is driven along guide rail slid inward until closing completely；
Wherein, the binding site of the drawer body and the casing, side have been provided with the guide rail of positioning and guide effect, separately
Side is provided with linear electric motors, including：The guide rail is arranged on the both sides of the drawer body, institute with the linear electric motors respectively
State guide rail to be installed on the left of the drawer body, the linear electric motors are installed on the right side of the drawer body；Or the guide rail peace
Loaded on the right side of the drawer body, the linear electric motors are installed on the left of the drawer body.
2. electromagnetic levitation type intelligent drawer as claimed in claim 1, it is characterised in that the linear electric motors include stator and rotor,
One of them is installed on drawer body, and another is installed in the casing, and the rotor engagement is arranged on the stator,
The power-supply system driving lower rotor part stator relative can slide.
3. electromagnetic levitation type intelligent drawer as claimed in claim 2, it is characterised in that the rotor includes the permanent magnetism being arranged in order
Body, adjacent permanent magnet opposite polarity, the stator are power electromagnetism group, including the electromagnet being arranged in order, adjacent electromagnet
Coil winding-direction is on the contrary, all coils connection in sequential series.
4. electromagnetic levitation type intelligent drawer as claimed in claim 3, it is characterised in that the stator also includes opening for critical localisation
The first dynamic set winding.
5. electromagnetic levitation type intelligent drawer as claimed in claim 4, it is characterised in that the stator also includes being used for spacing second
Set winding, when the drawer body is in fully closed condition, the end of rotor described in the second set winding face
Permanent magnet.
A kind of 6. operation method based on the electromagnetic levitation type intelligent drawer as described in claim any one of 1-5, it is characterised in that institute
The method of stating includes：
In the case where drawer body is in fully closed condition, linear electric motors drive drawer body along leading under power-supply system driving
Rail is slid in and out until opening completely；
In the case where drawer body is in full open position, when the drawer body is by extraneous thrust, linear electric motors are in power supply
Under system drive, drawer body is driven along guide rail slid inward until closing completely.
7. method as claimed in claim 6, it is characterised in that the linear electric motors drive drawer sheet under power-supply system driving
Body is slid in and out along guide rail until complete opening steps, are specifically included：
Power-supply system loads alternating current to the coil of power electromagnetism group, and whether the second set winding of detection has curent change, if having
Curent change then persistently loads alternating current so that and drawer body slides in and out, and otherwise carries out phase offset to the alternating current of loading,
Change the relative glide direction of rotor and stator；
The curent change of the first set winding is detected, when electric current persistently changes, continues to load the coil of power electromagnetism group and hands over
Stream electricity so that rotor continues to slide relatively with stator, when no current in the first set winding, changes the frequency of alternating current
So that stator and rotor geo-stationary.
8. method as claimed in claim 7, it is characterised in that the power-supply system loads exchange to the coil of power electromagnetism group
Electricity, detection the second set winding whether have curent change, alternating current is persistently loaded if having curent change so that drawer body to
Outer slip, phase offset otherwise is carried out to the alternating current of loading, before the relative glide direction step for changing rotor and stator, also
Including：
Power-supply system loads short-time current to the first set winding, rotor and stator is carried out relative slide to depart from critical shape
State.
9. method as claimed in claim 6, it is characterised in that the linear electric motors drive drawer sheet under power-supply system driving
Body is along guide rail slid inward until complete closure step, is specifically included：
Electric current in the coil of power electromagnetism group is detected, after finding to have curent change, coil of the power-supply system to power electromagnetism group
Lasting loading can make the alternating current of its return；
The electric current in the second set winding is detected, after finding to have curent change, power-supply system changes loaded alternating current
State, stator is set to be in relative static conditions with rotor.
10. such as any one of claim 7-9 methods described, it is characterised in that the alternating current is square wave alternating-current electricity.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310548108.XA CN104622049B (en) | 2013-11-06 | 2013-11-06 | A kind of electromagnetic levitation type intelligent drawer and its operation method |
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| CN201310548108.XA CN104622049B (en) | 2013-11-06 | 2013-11-06 | A kind of electromagnetic levitation type intelligent drawer and its operation method |
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| CN104622049B true CN104622049B (en) | 2018-01-16 |
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| US20130264926A1 (en) * | 2012-04-04 | 2013-10-10 | Fengdong Zhao | Automated Drawer Slide |
| CN202552928U (en) * | 2012-04-05 | 2012-11-28 | 浙江工商职业技术学院 | Automatic pop-up device of voice control medical drawer |
| CN203748953U (en) * | 2013-11-06 | 2014-08-06 | 深圳桑达商用机器有限公司 | Magnetic suspension type intelligent drawer |
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2013
- 2013-11-06 CN CN201310548108.XA patent/CN104622049B/en active Active
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