CN102961793A - Medical feedback flat piezoelectric auto-micro injector - Google Patents
Medical feedback flat piezoelectric auto-micro injector Download PDFInfo
- Publication number
- CN102961793A CN102961793A CN2012105266229A CN201210526622A CN102961793A CN 102961793 A CN102961793 A CN 102961793A CN 2012105266229 A CN2012105266229 A CN 2012105266229A CN 201210526622 A CN201210526622 A CN 201210526622A CN 102961793 A CN102961793 A CN 102961793A
- Authority
- CN
- China
- Prior art keywords
- valve block
- piezoelectric
- support
- outlet valve
- hole
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Abstract
The invention relates to a medical feedback flat piezoelectric auto-micro injector, which comprises a bracket, an inlet valve block, an outlet valve block, a sensor at the outlet valve block, a pressing buckle, a piezoelectric vibrator, a sealing ring, a shell and the like, wherein the piezoelectric vibrator is the key of a whole piezoelectric pump which is of a double-vibrator single-chamber structure in a d31 piezoelectric mode and consists of a metal substrate, a piezoelectric ceramic chip and an electrode; and two piezoelectric pumps are stuck on the bracket in total. When the piezoelectric vibrators work and the pumps are expanded, negative pressure is formed in the pumps and liquid props up the inlet valve block to be injected in the pumps; and meanwhile, due to the negative pressure in the chamber, the outlet valve block is firmly absorbed on a valve port to prevent the liquid at the outlet from flowing back. When the pumps are shrunk, liquid is pressed out from the outlet by the high pressure in the pumps, and the inlet valve block is firmly pressed at the inlet to effectively prevent liquid from flowing out from the inlet. The medical feedback flat piezoelectric auto-micro injector is compact in structure, convenient to process and assemble and formed by the adhesion of medical silica gel completely; and the piezoelectric ceramic and the metal substrate are coated with medical protection plastics, therefore, the medical feedback flat piezoelectric auto-micro injector is low in cost, huge in number of potential application groups and suitable for mass production.
Description
Technical field
The invention belongs to medical instruments field, relate to a kind of medical automatic injector, especially a kind of portable medical automatic injector.
Background technology
Since later 1970s, first piezoelectric pump model was suggested, piezoelectric pump was subject to various countries scholar's extensive attention day by day with its unique working method and special performance.Compare with conventional pump, that piezoelectric pump has is simple in structure, volume is little, lightweight, power consumption is low, without electromagnetic interference, its output performance is easy to the advantages such as control.And batchprocess is fairly simple, and cost is low, can be made into onetime injecting things, and stable and reliable for performance, scheme is feasible.The flow of piezoelectric pump is fully controlled, and control accuracy is high, can satisfy the requirement of medical micro-automatic injection, and controller can reuse the reduction cost.The flat piezoelectricity automatic fine of medical reaction type syringe automatic injection system can break away from the pattern of traditional infusion, very convenient carrying, and the action of liberation transfusion patient, and can realize little dosage injection.Piezoelectric pump version flexible design can be designed the Series Piezoelectric pump structure according to different flow and use position, and feedback mode control, satisfies the requirement of product seriation.Because cost is low, potential application group's quantity is huge, is fit to mass production.
In view of above background technology, theoretical based on piezoelectric effect, designed a kind of novel flat piezoelectricity automatic fine of medical reaction type syringe.
Summary of the invention
The object of the present invention is to provide the flat piezoelectricity automatic fine of a kind of new medical reaction type syringe.
The flat piezoelectricity automatic fine of the medical reaction type syringe that the present invention proposes comprises support 1, import valve block 2, outlet valve block 3, sensor 4, clinching 5, metallic matrix 6, electrode 7, piezoelectric patches 8, sealing ring 9 and shell 10; Wherein: described support 1 comprises liquid outlet 11, outlet valve block installing hole 12, lead-in wire installation base 13, import valve block installing hole 14, inlet opening 15, the bonding platform 16 of piezoelectric vibrator; Support 1 is the hollow frame structure in middle part, is provided with the bonding platform 16 of piezoelectric vibrator around the hollow position both sides, middle part; Support 1 top is provided with liquid outlet 11 and the outlet valve block installing hole 12 that runs through, and the bottom is provided with import valve block installing hole 14 and the inlet opening 15 that runs through, and support 1 one sides are provided with lead-in wire installation base 13;
Described metallic matrix 6, piezoelectric patches 8 and electrode 7 be the bonding piezoelectric vibrator that is assembled into successively, and two cover piezoelectric vibrators are bonded on the bonding platform 16 of piezoelectric vibrator of support 1 both sides, form the work pump housing;
3 one-tenth zigzag shapes of described outlet valve block have outlet valve block positioning through hole 17 on it;
" protruding " word shape that described import valve block 2 is dome has import valve block positioning through hole 18 on it;
Described sensor 4 is resistance strain gage, is processed into equally the zigzag shape, is bonded on the outlet valve block 3.The outlet valve block positioning through hole 17 of outlet valve block 3 links to each other with outlet valve block installing hole 12 on the support 1 by clinching 5, and the import valve block positioning through hole 18 of import valve block 2 links to each other with import valve block installing hole 14 on the support 1;
Described shell 10 is provided with the extension 19 that is connected with outer pipeline; Cavity in the described shell 10 is divided into installing zone 20, relief area 21, wire casing district 22 and interface 23, and wire casing district 22 is connected and installed district 20, and installing zone 20 and wire casing district 22 are positioned at interface 23 tops;
Described sealing ring 9 is bonded on the plane of installing zone 20, and the interior hole shape of sealing ring 9 is identical with relief area 21 flat shapes;
Described shell 10 is two, and insert in the installing zone 20 of shell 10 work pump housing both sides, and be adhered to respectively on the sealing ring 9 that is positioned at two shells 10, and the interface 23 of two shells 10 is bonding, two shells 10 and the formation relief area 21 between the pump body of working.
Among the present invention, the wire casing district 22 of described shell 10 forms wire inserting slot 24 with lead-in wire installation base 13 junctions of support 1, and wire inserting slot 24 sizes can be changed as required.
Operation principle of the present invention is: this piezoelectric pump adopts two oscillator list cavity body structures of d31 piezoelectricity pattern.Formed by metallic matrix, piezoelectric ceramic piece and electrode, totally two, be attached on the support.When piezoelectric vibrator work, when the pump housing expands, form negative pressure in the pump housing, liquid just can back down in the import valve block injection pump body, is negative pressure owing to what form in the cavity simultaneously, and the outlet valve block just is adsorbed on the valve port firmly, prevents the exit liquid return.When the pump housing shrank, the high pressure in the pump housing just extruded liquid from the exit, and the entrance valve block is pressed in the porch inflexibly simultaneously, has effectively stoped liquid to flow out from entrance.
The present invention has following characteristics: during the piezoelectric vibrator vibration, can cause the Swelling and contraction of the support pump housing.When the pump housing expanded, pump housing volume increased, and formed negative pressure, and inlet opening relief area place liquid just backs down the import valve block and enters in the pump housing.The valve block at liquid outlet place has effectively been prevented the liquid outflow because negative pressure then firmly is adsorbed on the liquid outlet place.When the pump housing shrank, volume reduced, just the past external pressure of liquid.The interior liquid of pump housing this moment just backs down the outlet valve block, enters in the outlet relief area, and the valve block at inlet opening place then is crushed to death in import department, effectively prevents liquid return.The present invention has used the outlet valve block with sensor, can monitor fluid flow, and regulate as required the output flow of piezoelectric pump.Wire inserting slot design simultaneously of the present invention is very ingenious, utilizes support boss and upper lower casing to form wire inserting slot, need not to introduce other structures.
Description of drawings
The three-dimensional explosive view of Fig. 1 piezoelectric pump.
Fig. 2 support 3-D view and cutaway view.Wherein: (a) being 3-D view, (b) is cutaway view.
The three-dimensional assembling relationship figure of Fig. 3 piezoelectric vibrator.
Fig. 4 exports valve block and sensor 3-D view and assembling relationship figure.Wherein: (a) for outlet valve block 3-D view, (b) being the sensor 3-D view, (c) is assembling relationship figure.
Fig. 5 import valve block and clinching 3-D view.Wherein: (a) be import valve block 3-D view, (b) be the clinching 3-D view.
Fig. 6 pump housing assembling relationship figure.
Fig. 7 cut-away view of outer cover and 3-D view.Wherein: (a) being cutaway view, (b) is 3-D view.
Fig. 8 assembly cutaway view.
Number in the figure: 1, support, 2, the import valve block, 3, the outlet valve block, 4, sensor, 5, clinching, 6, metallic matrix, 7, electrode, 8, piezoelectric patches, 9, sealing ring, 10, shell, 11, liquid outlet, 12, outlet valve block installing hole, 13, lead-in wire installation base, 14, import valve block installing hole, 15, inlet opening, 16, the bonding platform of piezoelectric vibrator, 17, outlet valve block positioning through hole, 18, import valve block positioning through hole, 19, extension, 20, installing zone, 21, relief area, 22, wire casing district, 23, interface, 24, wire inserting slot.
The specific embodiment
The present invention is further illustrated below in conjunction with the accompanying drawing illustrated embodiment.
As shown in Figure 1, the flat piezoelectricity automatic fine of the medical reaction type of the present invention syringe comprises support 1, import valve block 2, outlet valve block 3, sensor 4, clinching 5, metallic matrix 6, electrode 7, piezoelectric patches 8, sealing ring 9, shell 10.
As shown in Figure 2, described support 1 total overall dimensions is 21.4mm * 16.4mm * 7mm, comprises liquid outlet 11, outlet valve block installing hole 12, lead-in wire installation base 13, import valve block installing hole 14, inlet opening 15, the bonding platform 16 of piezoelectric vibrator.
As shown in Figure 3, described metallic matrix 6 thick 0.3mm, piezoelectric patches 8 thick 0.4mm, electrode 7 thick 0.15mm are the bonding piezoelectric vibrator that is assembled into successively, and two cover piezoelectric vibrators are bonded in respectively on the bonding platform 16 of piezoelectric vibrator of support 1 both sides, form the work pump housing.
Shown in Fig. 3 (a), outlet valve block 3 thickness are 0.3mm, are bent into the zigzag shape, have positioning through hole 17 on it.
Shown in Fig. 4 (a), " protruding " word shape that described import valve block 2 is dome, thickness is 0.3mm, has positioning through hole 18 on it.
Be resistance strain gage such as sensor 4 as described in Fig. 4 (b), be processed into equally the zigzag shape, shown in Fig. 4 (c), sensor 4 is bonded on the outlet valve block 3, export at last the positioning through hole 17 usefulness clinchings 5 of valve block 3 and link to each other with outlet valve block installing hole 12 on the support 1, the positioning through hole 18 of import valve block 2 links to each other with import valve block installing hole 14 on the support 1; Wherein: the structure of clinching 5 is shown in Fig. 5 (b).
As shown in Figure 6, each cover is bonded on the bonding platform 16 of piezoelectric vibrator of support 1 about piezoelectric vibrator, and two pins of piezoelectric vibrator are bonded in respectively in the side grooves of lead-in wire boss 13.Import valve block positioning through hole 18 on the import valve block 2 links to each other with import valve block installing hole 14 usefulness clinchings 5 on the support 1.The outlet valve block 3 usefulness clinchings 5 that are pasted with sensor 4 are installed on the outlet valve block installing hole 12, and the lower end is bonded on the lead-in wire boss 13 simultaneously.
As shown in Figure 7, described shell 10 is cavity type parts, and the extension 19 that is connected with outer pipeline is arranged on the sealing surface, and cavity is divided into installing zone 20, relief area 21, wire casing district 22, interface 23.Sealing ring 9 is bonded on the installing zone plane, and the interior hole shape of sealing ring is identical with the relief area flat shape; First sealing ring 9 is bonded on installing zone 20 planes assembling two covers.Be bonded on the valve block installed surface of support 1, the interface 23 of two shells 10 is coated medical silica-gel and is bonded together again.
As shown in Figure 8, after assembling was finished, the wire inserting slot 24 of formation can according to customer requirement, change the wire inserting slot size.
Whole device is bonding with medical silica-gel, and erection sequence is as follows: the first step, respectively with metallic matrix 6, piezoelectric patches 8, electrode 7 successively bonding formation piezoelectric vibrator, note the parallel placement of two pins, totally two covers.Again sensor 4 is sticked on the outlet valve block 3, note centering.Second step, the 2 usefulness clinchings 5 of import valve block are rack-mount, to export valve block 3 usefulness clinchings 5 is installed on support 1 side again, and will export valve block 3 lower ends stick on the lead-in wire boss 13 on, at last two cover piezoelectric vibrators are sticked on respectively support 1 both sides, notice that pin will stick in lead-in wire boss 13 grooves.The 3rd step sticked on sealing ring 9 in the shell 10, prepared two covers.At last the interface 13 of two shells 10 is coated silica gel with sealing ring 9, be bonded on the valve block installed surface of support 1, the interface of two shells 10 also will cement simultaneously.
The flat piezoelectricity automatic fine of the medical reaction type syringe that the present invention proposes, its innovative point is that mainly the sensor that exports the valve block place can detect flow, and according to this feedback regulation uninterrupted.Piezoelectric vibrator and support bonding simple and easy to do is fit to produce in enormous quantities.Shell is advanced with the wire inserting slot design concept that the lead-in wire boss forms, and can change as requested the interface size.Assembling of the present invention all uses medical silica-gel bonding, and the metal that directly contacts with medicinal liquid such as piezoelectric vibrator, gets rid of the glue-line of last layer micron order thickness with photoresist spinner, does not affect the performance of oscillator simultaneously.Shell, support can be used medical plastic, are convenient to processing.
Claims (2)
1. the flat piezoelectricity automatic fine of a medical reaction type syringe is characterized in that: comprise support (1), import valve block (2), outlet valve block (3), sensor (4), clinching (5), metallic matrix (6), electrode (7), piezoelectric patches (8), sealing ring (9) and shell (10); Wherein:
Described support (1) comprises liquid outlet (11), outlet valve block installing hole (12), lead-in wire installation base (13), import valve block installing hole (14), inlet opening (15), the bonding platform of piezoelectric vibrator (16); Support (1) is the hollow frame structure in middle part, is provided with the bonding platform of piezoelectric vibrator (16) around the hollow position both sides, middle part; Support (1) top is provided with liquid outlet (11) and the outlet valve block installing hole (12) that runs through, the bottom is provided with import valve block installing hole (14) and the inlet opening (15) that runs through, and support (1) one side is provided with lead-in wire installation base (13);
Described metallic matrix (6), piezoelectric patches (8) and electrode (7) be the bonding piezoelectric vibrator that is assembled into successively, and two cover piezoelectric vibrators are bonded on the bonding platform of piezoelectric vibrator (16) of support (1) both sides, form the work pump housing;
Described outlet valve block (3) becomes the zigzag shape, has outlet valve block positioning through hole (17) on it;
Described import valve block (2) is " protruding " word shape of dome, has import valve block positioning through hole (18) on it;
Described sensor (4) is resistance strain gage, is processed into equally the zigzag shape, is bonded on the outlet valve block (3); The outlet valve block positioning through hole (17) of outlet valve block (3) links to each other with outlet valve block installing hole (12) on the support (1) by clinching (5), and the import valve block positioning through hole (18) of import valve block (2) links to each other with import valve block installing hole (14) on the support (1);
Described shell (10) is provided with the extension (19) that is connected with outer pipeline; Cavity in the described shell (10) is divided into installing zone (20), relief area (21), wire casing district (22) and interface (23), wire casing district (22) is connected and installed district (20), and installing zone (20) and wire casing district (22) are positioned at interface (23) top;
Described sealing ring (9) is bonded on the plane of installing zone (20), and the interior hole shape of sealing ring (9) is identical with relief area (21) flat shape;
Described shell (10) is two, insert in the installing zone (20) of shell (10) work pump housing both sides, and be adhered to respectively on the sealing ring 9 that is positioned at two shells (10), the interface (23) of two shells (10) is bonding, forms relief area (21) between two shells (10) and the work pump body.
2. the flat piezoelectricity automatic fine of medical reaction type according to claim 1 syringe is characterized in that the wire casing district (22) of described shell (10) and lead-in wire installation base (13) the junction formation wire inserting slot (24) of support (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012105266229A CN102961793A (en) | 2012-12-10 | 2012-12-10 | Medical feedback flat piezoelectric auto-micro injector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012105266229A CN102961793A (en) | 2012-12-10 | 2012-12-10 | Medical feedback flat piezoelectric auto-micro injector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102961793A true CN102961793A (en) | 2013-03-13 |
Family
ID=47792409
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012105266229A Pending CN102961793A (en) | 2012-12-10 | 2012-12-10 | Medical feedback flat piezoelectric auto-micro injector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102961793A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104971401A (en) * | 2015-07-20 | 2015-10-14 | 冯圣冰 | Fully automatic micro-injection pump for anaesthesia |
| CN114247010A (en) * | 2021-12-27 | 2022-03-29 | 江苏大学附属医院 | Medical feedback type columnar piezoelectric automatic micro-injector |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0134614A1 (en) * | 1983-08-15 | 1985-03-20 | Vitafin N.V. | Piezo-electrical micropump |
| CN101103200A (en) * | 2005-01-26 | 2008-01-09 | 松下电工株式会社 | Piezoelectric diaphragm pump |
| CN201162655Y (en) * | 2007-12-07 | 2008-12-10 | 吉林大学 | Single-cavity double-transducer piezoelectric pump |
| US20110160668A1 (en) * | 2009-12-28 | 2011-06-30 | Ricoh Company, Ltd. | Infusion pump module |
| CN102120050A (en) * | 2009-11-12 | 2011-07-13 | 株式会社理光 | Infusion pump module |
| CN102536755A (en) * | 2012-03-01 | 2012-07-04 | 苏州大学 | Closed-loop piezoelectric film pump and flow control method |
-
2012
- 2012-12-10 CN CN2012105266229A patent/CN102961793A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0134614A1 (en) * | 1983-08-15 | 1985-03-20 | Vitafin N.V. | Piezo-electrical micropump |
| CN101103200A (en) * | 2005-01-26 | 2008-01-09 | 松下电工株式会社 | Piezoelectric diaphragm pump |
| CN201162655Y (en) * | 2007-12-07 | 2008-12-10 | 吉林大学 | Single-cavity double-transducer piezoelectric pump |
| CN102120050A (en) * | 2009-11-12 | 2011-07-13 | 株式会社理光 | Infusion pump module |
| US20110160668A1 (en) * | 2009-12-28 | 2011-06-30 | Ricoh Company, Ltd. | Infusion pump module |
| CN102536755A (en) * | 2012-03-01 | 2012-07-04 | 苏州大学 | Closed-loop piezoelectric film pump and flow control method |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104971401A (en) * | 2015-07-20 | 2015-10-14 | 冯圣冰 | Fully automatic micro-injection pump for anaesthesia |
| CN114247010A (en) * | 2021-12-27 | 2022-03-29 | 江苏大学附属医院 | Medical feedback type columnar piezoelectric automatic micro-injector |
| CN114247010B (en) * | 2021-12-27 | 2023-08-18 | 江苏大学附属医院 | Medical feedback type columnar piezoelectric automatic microinjector |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101588838B (en) | Miniature valve | |
| JP5027930B2 (en) | Pump device including safety valve | |
| CN105874254A (en) | Diaphragm check valves and methods of manufacture thereof | |
| CN102961793A (en) | Medical feedback flat piezoelectric auto-micro injector | |
| CN105576917B (en) | Motor rotor core magnet steel glue-pouring device | |
| CN103362786A (en) | Minitype piezoelectric diaphragm pump | |
| CN101673165B (en) | Resistance type glass-glass touch screen and manufacturing method thereof | |
| CN102961806B (en) | Medical feedback columnar piezoelectric auto-micro injector | |
| NL1031465C2 (en) | Method for constructing a device with fluidic and electrical functions. | |
| CN112629401B (en) | Method for manufacturing road surface structure strain sensor and sensor | |
| CN106357151B (en) | A kind of large deformation is than plate piezoelectric activation configuration | |
| CN107764714B (en) | A kind of axis pressure loading device and heat flow piercement device | |
| US8974416B2 (en) | Disposable cassette for an infusion pump for medical use and method for manufacture thereof | |
| CN202049999U (en) | Piezoelectric ceramic-based driver device | |
| CN206807876U (en) | Double gum foam laminating components and frock | |
| CN109770440B (en) | Electronic cigarette hydraulic electric pumping device and electronic cigarette product thereof | |
| CN102269150A (en) | Micro pump | |
| CN208221047U (en) | A kind of 3 points of clamped membrane valve piezoelectric pumps | |
| TW374197B (en) | Manufacturing process of integrated micro-flow control module | |
| CN105259934B (en) | Wireless remote control microinjection apparatus | |
| AU2014302460A1 (en) | Electrolysis recombination control mask and method of manufacture thereof | |
| CN105089993A (en) | Piezoelectric pump based on secondary resonance | |
| CN204738947U (en) | Powerful output sandwich active type water -jet propulsion system | |
| CN219035671U (en) | Adjustable negative pressure pump air valve assembly | |
| CN219932413U (en) | Micropump |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20130313 |