CN114522298B - Micro-injection pump - Google Patents
Micro-injection pump Download PDFInfo
- Publication number
- CN114522298B CN114522298B CN202210024774.2A CN202210024774A CN114522298B CN 114522298 B CN114522298 B CN 114522298B CN 202210024774 A CN202210024774 A CN 202210024774A CN 114522298 B CN114522298 B CN 114522298B
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- Prior art keywords
- rod
- pressure
- fixed
- pressing
- connecting groove
- Prior art date
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- 238000000520 microinjection Methods 0.000 title claims abstract description 21
- 230000007246 mechanism Effects 0.000 claims abstract description 21
- 230000000087 stabilizing effect Effects 0.000 claims abstract description 19
- 238000007789 sealing Methods 0.000 claims description 11
- 239000012530 fluid Substances 0.000 claims description 9
- 230000000694 effects Effects 0.000 abstract description 8
- 230000006835 compression Effects 0.000 description 32
- 238000007906 compression Methods 0.000 description 32
- 238000002347 injection Methods 0.000 description 10
- 239000007924 injection Substances 0.000 description 10
- 239000003814 drug Substances 0.000 description 7
- SZVJSHCCFOBDDC-UHFFFAOYSA-N iron(II,III) oxide Inorganic materials O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 description 4
- 238000012856 packing Methods 0.000 description 4
- 239000007788 liquid Substances 0.000 description 3
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 2
- 235000017491 Bambusa tulda Nutrition 0.000 description 2
- 241001330002 Bambuseae Species 0.000 description 2
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 239000011425 bamboo Substances 0.000 description 2
- 238000005056 compaction Methods 0.000 description 2
- 239000010720 hydraulic oil Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 238000001802 infusion Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000010999 medical injection Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
- A61M5/142—Pressure infusion, e.g. using pumps
- A61M5/145—Pressure infusion, e.g. using pumps using pressurised reservoirs, e.g. pressurised by means of pistons
- A61M5/1452—Pressure infusion, e.g. using pumps using pressurised reservoirs, e.g. pressurised by means of pistons pressurised by means of pistons
Abstract
The invention discloses a microinjection pump, which comprises a pump body, wherein a control panel is arranged on the pump body, a propulsion device is arranged on the pump body, one end of the propulsion device is provided with a connecting pressure head connected with a needle cylinder push rod, the pump body is provided with a needle cylinder fixing device, the needle cylinder fixing device comprises a fixing shell fixed on the pump body, a connecting groove is formed in the fixing shell, a pressing plate is hinged on the fixing shell, and the notch of the connecting groove can be blocked by the pressing plate; the fixed shell is connected with a pressing rod with one end extending into the connecting groove in a sliding manner, and the pressing rod is connected with a voltage stabilizing mechanism for driving the pressing rod to move towards the central line direction of the connecting groove. The invention has the effect of being convenient for fixing the syringes with different specifications.
Description
Technical Field
The invention relates to the field of medical injection instruments, in particular to a microinjection pump.
Background
Microinjection pump medication is used as a common clinical treatment means and is widely applied to various fields of medical practice. The working principle of the microinjection pump is that a stepping motor is used as a power source, the system sends out control pulses to enable the stepping motor to rotate, the stepping motor drives a screw rod to rotate, and the screw rod drives a push injection head on a transmission nut to linearly move, so that a piston of the injector is pushed to linearly move, liquid in the injector flows along one direction, and the pushing speed of the liquid can be adjusted by setting the rotating movement of the screw rod, so that the given medicine dosage is adjusted. Meanwhile, the speed measurement feedback system can also be used for guaranteeing the input, injection precision and reliability in the speed adjustment range.
The Chinese patent with the authorized bulletin number of CN104815369B discloses an ICU department microinjection pump device, which comprises a device main body, a stepping motor device and a liquid medicine flow control box, wherein a warning lamp is arranged on the front side of the device main body, a pipeline prompt blocking button, an injection stopping button and a medicine quantity prompt key are arranged on the right side of the warning lamp, an information display screen is arranged on the right side of the medicine quantity prompt key, a starting button is arranged between the information display screen and the medicine quantity prompt key, a medicine quantity selection key is arranged on the right side of the starting button, a power line opening is arranged on the device main body, the power line opening is connected with a power line, the power line is connected with a plug, an injection pressure support frame is arranged on the lower side of the device main body, the injection pressure support frame is connected with an injection pressure device, and the injection pressure box is arranged inside the injection pressure device. The injection pump of this scheme convenient to use.
The national standard only prescribes the capacity of the injector for the injector, and the diameter-length ratio of the injector is not limited. The syringe clamping grooves of the microinjection pump on the market are fixed at present, the syringes are clamped at the tail ends of the syringe tube and the syringe piston rod by a single fixing pressing sheet, the syringes are fixed, although the syringes provided by manufacturers can be used for syringes with different specifications, for some syringes with small diameters, such as 10ml syringes, the syringes with small diameters are placed in 60ml clamping grooves, the concave diameter of the clamping groove is definitely larger than that of the 10ml syringes,
the prior art solutions described above have the following drawbacks: the concavity of the fixed pressing sheet clamp is fixed, so that the matching degree of the fixed pressing sheets of the syringes with different diameters and the microinjection pump is poor, the tightness is difficult to ensure, and the sliding phenomenon of the syringe tube cannot be avoided in the pushing process.
Disclosure of Invention
The invention aims to provide a microinjection pump which has the effect of being convenient for fixing syringes with different specifications.
The technical aim of the invention is realized by the following technical scheme:
the microinjection pump comprises a pump body, wherein a control panel is arranged on the pump body, a propulsion device is arranged on the pump body, a connecting pressure head connected with a push rod is arranged at one end of the propulsion device, a needle cylinder fixing device is arranged on the pump body,
the needle cylinder fixing device comprises a fixing shell fixed on the pump body, a connecting groove is formed in the fixing shell, a pressing plate is hinged to the fixing shell, and the notch of the connecting groove can be shielded by the pressing plate;
the fixed shell is connected with a pressing rod with one end extending into the connecting groove in a sliding manner, and the pressing rod is connected with a voltage stabilizing mechanism for driving the pressing rod to move towards the central line direction of the connecting groove.
Through adopting above-mentioned technical scheme, put the cylinder in the spread groove, syringe needle and the connection pressure head on the cylinder compress tightly and are connected, rotate the pressure strip and make the pressure strip shelter from the spread groove notch, start stabilizing mean, stabilizing mean applys stable pressure effect to the pressure bar, the pressure bar removes, promote the cylinder that is located the spread groove when the pressure bar removes, until the pressure bar, cylinder and pressure strip compress tightly and be connected, realize the stable connection of cylinder and fixed shell, the cylinder of different specifications is put in the spread groove, the distance that the pressure bar removed is different, the pressure bar receives stabilizing mean's effect and can apply stable pressure to the cylinder, the cylinder of multiple specification of being convenient for is connected with the quick stability between the pump body.
The invention is further provided with: the pressure stabilizing mechanism comprises a fixed cylinder sleeved on the compression rod, the compression rod is in sealing sliding connection with the inner cavity of the fixed cylinder, a high-pressure hose is communicated with the fixed cylinder, a pressure pump is communicated with the high-pressure hose, and the pressure pump provides fluid with stable pressure to the high-pressure hose.
Through adopting above-mentioned technical scheme, the injection high-pressure fluid in to the high-pressure hose when the pressure pump starts, high-pressure fluid gets into the fixed section of thick bamboo through the high-pressure hose, and high-pressure fluid promotes the hold-down bar and removes along the fixed section of thick bamboo inner chamber to realize steady voltage mechanism and exert stable pressure effect to the hold-down bar.
The invention is further provided with: the fixed cylinder is internally provided with a movable sealing groove, the movable sealing groove is internally embedded with a movable sealing ring, and the pressing rod is in sliding connection with the fixed cylinder through the movable sealing ring.
Through adopting above-mentioned technical scheme, inlay the movable seal circle and the fixed cylinder that locate in the movable seal groove and keep stable being connected, movable seal circle snare is located the compressing rod outside to realize compressing rod and the sealed sliding connection of fixed cylinder.
The invention is further provided with: the compressing rods are arranged at intervals along the circumference of the central line of the connecting groove.
Through adopting above-mentioned technical scheme, a plurality of hold-down bars exert effect to the cylinder, make cylinder and pressure strip compression connection, the effort that the hold-down bar applyed the cylinder distributes evenly, and stability between hold-down bar and the cylinder is high.
The invention is further provided with: and one end of the pressing rod, which faces the center line of the connecting groove, is fixedly provided with a pressing cushion block.
By adopting the technical scheme, the pressing cushion block can increase the contact area between the pressing rod and the outer side surface of the needle cylinder, and reduce the pressure at the joint of the pressing rod and the needle cylinder while improving the connection stability of the pressing rod and the needle cylinder.
The invention is further provided with: the connecting press head is hinged with two mounting plates arranged at vertical intervals, and a tension spring is connected between the two mounting plates.
Through adopting above-mentioned technical scheme, when being connected push rod and connection pressure head, put the push rod between two mounting panels, the extension spring drives two mounting panels and push rod and compresses tightly to be connected, improves the stability of connection.
The invention is further provided with: the limiting rod comprises an inner rod fixed with the fixed shell and an outer rod fixed on the inner rod, the surface of the outer rod facing the fixed shell can be contacted with the surface of the compacting plate facing away from the fixed shell, when the device works, the compacting plate stretches across the notch of the connecting groove, and the end part of the compacting plate, which is far away from the hinging point of the compacting plate, and the limiting rod are positioned on the same side of the notch of the connecting groove; when not in work, the limiting rod and the pressing plate are respectively positioned at two sides of the notch of the connecting groove.
Through adopting above-mentioned technical scheme, rotate the pressure strip around pressure strip and the articulated department of fixed shell, until the pressure strip keep away from its articulated one end of fixed shell and remove to between outer pole and the fixed shell, pressure strip surface and outer pole towards the medial surface contact compaction of fixed shell, the pressure strip shelters from the spread groove notch this moment, and pressure strip keeps stable the connection with the fixed shell.
The invention is further provided with: the limiting rod is an L-shaped rod with an opening along the length direction of the connecting groove, a fixed magnet is fixedly arranged on the inner rod at the inner side of the opening of the limiting rod, and a movable magnet is fixedly arranged on the surface, in contact with the inner rod, of the pressing plate.
Through adopting above-mentioned technical scheme, rotate the pressure strip until remove when magnetite and fixed magnetite contact each other, the pressure strip is located between interior pole and the fixed shell, and the interact between removal magnetite and the fixed magnetite can avoid the syringe pump in-process of using, vibration or other circumstances unexpected circumstances of separating take place between pressure strip and the gag lever post.
The invention is further provided with: the limiting groove is formed in the fixing shell, a yielding groove communicated with the limiting groove is formed in the surface, facing the connecting pressure head, of the fixing shell, a cover-shaped pressing plate with an opening facing the connecting pressure head is arranged in the yielding groove, a pressure spring is connected to the inner side, facing the connecting pressure head, of the cover-shaped pressing plate, and a mounting plate fixed to the fixing shell is propped against the end face, facing the connecting pressure head, of the pressure spring.
By adopting the technical scheme, the opening of the cover-shaped compression plate faces the connecting pressure head, the cover-shaped compression plate is pushed to be inserted into the limit groove through the abdication groove, the pressure spring is placed in the opening of the cover-shaped compression plate, the mounting plate is fixed on the surface of the fixing shell facing the connecting pressure head, and the two end faces of the pressure spring are respectively in compression connection with the cover-shaped compression plate and the mounting plate; the pull handle on the needle cylinder is placed in the limit groove, the cover-shaped pressing plate is pressed with the pull handle, and the stability of connection between the needle cylinder and the fixed shell is improved.
The invention is further provided with: the cover-shaped pressing plate smoothly transits towards one side of the opening of the connecting groove.
Through adopting above-mentioned technical scheme, lid shape pressure strip installation back, lid shape pressure strip back is compressed tightly with the side of spacing groove to the surface of connecting the pressure head, when will need insert lid shape pressure strip with the pull handle of installation, the lid shape pressure strip of being convenient for moves towards the pressure head direction of connecting.
In summary, the beneficial effects of the invention are as follows:
1. the needle on the needle cylinder is pressed and connected with the connecting pressure head, the pressing plate is rotated to shield the notch of the connecting groove, the pressure stabilizing mechanism is started, the pressure stabilizing mechanism exerts a stable pressure effect on the pressing rod, the pressing rod moves, the needle cylinder positioned in the connecting groove is pushed when the pressing rod moves until the pressing rod, the needle cylinder and the pressing plate are pressed and connected, stable connection of the needle cylinder and the fixed shell is realized, needle cylinders with different specifications are placed in the connecting groove, the moving distance of the pressing rod is different, the pressing rod can exert stable pressure on the needle cylinder under the action of the pressure stabilizing mechanism, and the quick and stable connection between the needle cylinders with various specifications and the pump body is facilitated;
2. when the pressure pump is started, high-pressure fluid is injected into the high-pressure hose, the high-pressure fluid enters the fixed cylinder through the high-pressure hose, and the high-pressure fluid pushes the compression rod to move along the inner cavity of the fixed cylinder, so that the pressure stabilizing mechanism can exert a stable pressure effect on the compression rod;
3. pushing the cover-shaped pressing plate to insert into the limit groove through the abdication groove after the opening of the cover-shaped pressing plate faces the connecting pressure head, placing the pressure spring in the opening of the cover-shaped pressing plate, fixing the mounting plate on the surface of the fixing shell facing the connecting pressure head, and respectively pressing and connecting the two end surfaces of the pressure spring with the cover-shaped pressing plate and the mounting plate; the pull handle on the needle cylinder is placed in the limit groove, the cover-shaped pressing plate is pressed with the pull handle, and the stability of connection between the needle cylinder and the fixed shell is improved.
Drawings
FIG. 1 is a schematic overall structure of an embodiment;
FIG. 2 is an enlarged view at A in FIG. 1;
FIG. 3 is a schematic diagram showing the structure of a voltage stabilizing mechanism in the embodiment;
FIG. 4 is a schematic cross-sectional view showing the connection relationship between the fixing cylinder and the pressing rod in the embodiment;
fig. 5 is an exploded view showing the pressing mechanism in the embodiment.
In the figure, 1, a pump body; 11. a control panel; 2. a needle cylinder fixing device; 21. a fixed case; 211. a connecting groove; 212. a limit groove; 213. a relief groove; 22. a compacting plate; 221. moving the magnet; 23. a pressing rod; 24. a voltage stabilizing mechanism; 241. a fixed cylinder; 2411. a dynamic seal groove; 2412. a connection housing; 242. a high pressure hose; 243. a pressure pump; 244. a movable sealing ring; 25. compacting the cushion block; 3. a limit rod; 31. an inner rod; 32. an outer rod; 33. fixing a magnet; 4. a propulsion device; 41. connecting a pressure head; 411. a compaction groove; 42. a stabilizer bar; 43. a tension spring; 5. a compressing mechanism; 51. a cover-shaped compacting plate; 52. a mounting plate; 53. a pressure spring; 61. a needle cylinder; 62. a push rod.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Example 1
Referring to fig. 1, the invention discloses a microinjection pump, which comprises a pump body 1, wherein a control panel 11 is arranged on the pump body 1, and a control assembly is connected to the control panel 11 to control the operation of the pump body 1. The pump body 1 is connected with a needle cylinder 61, and the needle cylinder 61 is connected with a push rod 62 in a sliding way.
The pump body 1 is provided with a propulsion device 4, the propulsion device 4 is an existing propulsion device 4, in this embodiment, one end of the propulsion device 4 is fixed with a connection pressure head 41 for connecting the push rod 62, the propulsion device 4 drives the connection pressure head 41 to stably move along a linear direction, a compression slot 411 for accommodating the insertion of one end of the push rod 62 is formed in the connection pressure head 41, and the compression slot 411 is a round slot.
The connecting press head 41 is provided with a pressing mechanism 5 connected with a push rod 62, the pressing mechanism 5 comprises two mounting plates 52 hinged on the connecting press head 41 at intervals along the vertical direction, the axis of the hinge shaft of the two mounting plates 52 is parallel to the moving direction of the connecting press head, a tension spring 43 is connected between the two mounting plates 52, and the tension spring 43 drives the two mounting plates 52 to rotate around the hinge shaft of the connecting press head 41. When the push rod 62 is placed on the connecting pressure head 41, the tension spring 43 drives the two mounting plates 52 to be connected with the side face of the push rod 62 in a pressing mode.
The pump body 1 is provided with a needle cylinder fixing device 2, the needle cylinder fixing device 2 comprises a fixing shell 21 fixed on the pump body 1, the fixing shell 21 is a semi-cylindrical shell, a connecting groove 211 is formed in the plane of the fixing shell 21, which is opposite to the pump body 1, the connecting groove 211 is a semi-circular groove, and two ends of the connecting groove 211 penetrate through two ends of the fixing shell 21 in the axial direction.
Referring to fig. 1 and 2, a compression plate 22 is hinged on a plane of the fixing housing 21 facing away from the pump body 1, the compression plate 22 is a strip-shaped plate, the compression plate 22 can shield the notch of the connecting groove 211, and two compression plates 22 are arranged at intervals along the length direction of the connecting groove 211.
The fixed shell 21 is set firmly the gag lever post 3 on the plane that is facing away from the pump body 1, and gag lever post 3 and pressure strip 22 are located the both sides of spread groove 211 notch respectively. The limiting rod 3 is an L-shaped rod with an opening along the length direction of the connecting groove 211, the limiting rod 3 comprises an inner rod 31 fixed with the fixing shell 21 and an outer rod 32 integrally formed with the inner rod 31, and the surface of the outer rod 32 facing the fixing shell 21 can be contacted with the surface of the compacting plate 22 facing away from the fixing shell 21.
The fixed magnet 33 is fixedly arranged on the inner rod 31 inside the opening of the limiting rod 3, the movable magnet 221 is fixedly arranged on the surface, which is contacted with the inner rod 31, of the pressing plate 22, the pressing plate 22 is rotated into the opening of the limiting rod 3, and the movable magnet 221 and the fixed magnet 33 are mutually attracted.
Referring to fig. 1 and 3, a pressing rod 23 is slidably connected to the fixing case 21, one end of the pressing rod 23 passes through the fixing case 21, one end of the pressing rod 23 passing through the fixing case 21 can extend into the connecting groove 211, two groups of pressing rods 23 are arranged at intervals along the axial direction of the connecting groove 211, and four groups of pressing rods 23 are arranged at intervals along the circumferential direction of the central line of the connecting groove 211. The pressing rod 23 is connected with a voltage stabilizing mechanism 24 which drives the pressing rod to move towards the central line direction of the connecting groove 211.
Referring to fig. 3 and 4, the voltage stabilizing mechanism 24 includes a fixed cylinder 241 sleeved on the pressing rod 23, and the pressing rod 23 is in sealed sliding connection with the inner cavity of the fixed cylinder 241. The fixed cylinder 241 is cylindrical casing, and fixed cylinder 241 one end is provided with the sealed hole rather than the inner chamber intercommunication, and the one end of compressing tightly pole 23 passes sealed hole and stretches out fixed cylinder 241, is provided with annular movable seal groove 2411 in the sealed hole of fixed cylinder 241, and movable seal groove 2411 embeds and is equipped with movable seal 244, and movable seal 244 overlaps locates compressing tightly pole 23 outside, and compressing tightly pole 23 stretches into the one end integrated into one piece of fixed cylinder 241 inner chamber and has with the sliding tray, sliding tray lateral surface and fixed cylinder 241 medial surface contact.
The connecting shell 2412 is fixed on the outer side of the fixing cylinder 241, the connecting shell 2412 is a square shell, and four connecting shells 2412 in the same radial direction of the connecting groove 211 are fixed with fixing plates fixed on the fixing shell 21.
The inner cavity of the fixed cylinder 241 is provided with fluid, which is hydraulic oil in the embodiment, a high-pressure hose 242 is communicated with the fixed cylinder 241, the same pressure pump 243 is communicated with the high-pressure hose 242, the pressure pump 243 is communicated with all the high-pressure hoses 242, and the pressure pump 243 provides hydraulic oil with stable pressure into the high-pressure hose 242.
Referring to fig. 2, a pressing pad 25 is fixedly provided at one end of the pressing rod 23 toward the center line of the coupling groove 211. The packing spacer 25 can increase the contact area between the packing rod 23 and the outer side surface of the syringe 61, improve the connection stability of the packing rod 23 and the syringe 61, and reduce the pressure at the connection position of the packing rod 23 and the syringe 61.
Referring to fig. 5, a limiting groove 212 for accommodating a protruding pull-up handle at one end of the syringe 61 is formed in the fixed housing 21, the limiting groove 212 is formed in a plane of the fixed housing 21 facing away from the pump body 1, the limiting groove 212 is a semi-annular groove, a yielding groove 213 communicated with the limiting groove 212 is formed in a surface of the fixed housing 21 facing the connection pressure head 41, the yielding groove 213 is a semi-annular groove, the yielding groove 213 does not penetrate through the plane of the fixed housing 21 facing away from the pump body 1,
the cover-shaped pressing plate 51 with an opening facing the connecting pressure head 41 is arranged in the yielding groove 213, the cover-shaped pressing plate 51 comprises a bottom plate of a semicircular ring structure and a circumferential side plate fixed on the same side of the bottom plate, the joint of the bottom plate and the side plate is in smooth transition, the outer side surface of the side plate is in contact with the side surface of the yielding groove 213, the side plate slides along the side surface of the yielding groove 213, and the cover-shaped pressing plate 51 is in smooth transition towards one side of the opening of the connecting groove 211. The cover-shaped compression plate 51 is connected with a compression spring 53 towards the inner side of the connecting pressure head 41, the compression springs 53 are arranged in three along the circumferential direction of the cover-shaped compression plate 51 at intervals, the compression spring 53 is abutted against a mounting plate 52 fixed on the fixed shell 21 towards the end face of the connecting pressure head 41, and a notch for accommodating the push rod 62 is formed in the mounting plate 52.
A supporting plate is fixedly arranged on the shell, and a round hole for accommodating the infusion hose to pass through is formed in the supporting plate.
The implementation principle of the embodiment is as follows:
the needle on the needle cylinder 61 is placed in the connecting groove 211 and is in compression connection with the connecting pressure head 41, the compression plate 22 is rotated to enable the compression plate 22 to shield the notch of the connecting groove 211, the pressure stabilizing mechanism 24 is started, the pressure stabilizing mechanism 24 exerts a stable pressure on the compression rod 23, the compression rod 23 moves, the needle cylinder 61 positioned in the connecting groove 211 is pushed until the compression rod 23, the needle cylinder 61 and the compression plate 22 are in compression connection when the compression rod 23 moves, the stable connection of the needle cylinder 61 and the fixed shell 21 is realized, the needle cylinders 61 with different specifications are placed in the connecting groove 211, the moving distance of the compression rod 23 is different, the compression rod 23 can exert stable pressure on the needle cylinder 61 under the action of the pressure stabilizing mechanism 24, and the quick and stable connection between the needle cylinder 61 with various specifications and the pump body 1 is facilitated.
The present embodiment is only for explanation of the present invention and is not to be construed as limiting the present invention, and modifications to the present embodiment, which may not creatively contribute to the present invention as required by those skilled in the art after reading the present specification, are all protected by patent laws within the scope of claims of the present invention.
Claims (9)
1. The utility model provides a microinjection pump, includes pump body (1), be provided with control panel (11) on pump body (1), be provided with thrust unit (4) on pump body (1), thrust unit (4) one end is provided with connection pressure head (41) of connecting push rod (62), its characterized in that: the novel syringe fixing device is characterized in that a syringe fixing device (2) is arranged on the pump body (1), the syringe fixing device (2) comprises a fixing shell (21) fixed on the pump body (1), a connecting groove (211) is formed in the fixing shell (21), a pressing plate (22) is hinged to the fixing shell (21), and the notch of the connecting groove (211) can be shielded by the pressing plate (22); a pressing rod (23) with one end extending into the connecting groove (211) is connected to the fixed shell (21) in a sliding manner, and a voltage stabilizing mechanism (24) for driving the pressing rod (23) to move towards the central line direction of the connecting groove (211) is connected to the pressing rod; the pressure stabilizing mechanism (24) comprises a fixed cylinder (241) sleeved on the pressing rod (23), the pressing rod (23) is in sealing sliding connection with the inner cavity of the fixed cylinder (241), a high-pressure hose (242) is communicated with the fixed cylinder (241), a pressure pump (243) is communicated with the high-pressure hose (242), and the pressure pump (243) provides fluid with stable pressure to the high-pressure hose (242).
2. A microinjection pump according to claim 1, characterized in that: a movable sealing groove (2411) is arranged in the fixed cylinder (241), a movable sealing ring (244) is embedded in the movable sealing groove (2411), and the pressing rod (23) is in sliding connection with the fixed cylinder (241) through the movable sealing ring (244).
3. A microinjection pump according to claim 1, characterized in that: the plurality of pressing rods (23) are arranged at intervals along the circumference of the central line of the connecting groove (211).
4. A microinjection pump according to claim 1, characterized in that: one end of the pressing rod (23) facing the center line of the connecting groove (211) is fixedly provided with a pressing cushion block (25).
5. A microinjection pump according to claim 1, characterized in that: two mounting plates (52) arranged at intervals vertically are hinged on the connecting pressure head (41), and a tension spring (43) is connected between the two mounting plates (52).
6. A microinjection pump according to claim 1, characterized in that: the limiting rod (3) is fixedly arranged on the fixed shell (21), the limiting rod (3) comprises an inner rod (31) fixed with the fixed shell (21) and an outer rod (32) fixed on the inner rod (31), the surface of the outer rod (32) facing the fixed shell (21) can be contacted with the surface of the compacting plate (22) opposite to the fixed shell (21), when the limiting rod is in operation, the compacting plate (22) stretches across the notch of the connecting groove (211), and the end part of the compacting plate (22) far away from the hinging point of the limiting rod (3) is positioned on the same side of the notch of the connecting groove (211); when not in work, the limiting rod (3) and the pressing plate (22) are respectively positioned at two sides of the notch of the connecting groove (211).
7. The microinjection pump according to claim 6, wherein: the limiting rod (3) is an L-shaped rod with an opening along the length direction of the connecting groove (211), a fixed magnet (33) is fixedly arranged on the inner rod (31) at the inner side of the opening of the limiting rod (3), and a movable magnet (221) is fixedly arranged on the surface, in contact with the inner rod (31), of the pressing plate (22).
8. A microinjection pump according to claim 1, characterized in that: the utility model discloses a fixing device, including fixed shell (21), fixed shell (21) are connected pressure head (41) and are offered on the surface of pressure head (41) and have been offered groove (213) of stepping down with spacing groove (212) intercommunication, be provided with lid shape clamp plate (51) of opening orientation connection pressure head (41) in groove (213) of stepping down, the inboard of lid shape clamp plate (51) orientation connection pressure head (41) is connected with pressure spring (53), pressure spring (53) are pressed towards the terminal surface of connection pressure head (41) and are fixed in mounting panel (52) of fixed shell (21).
9. A microinjection pump according to claim 8, characterized in that: the cover-shaped pressing plate (51) smoothly transits towards one side of the opening of the connecting groove (211).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210024774.2A CN114522298B (en) | 2022-01-07 | 2022-01-07 | Micro-injection pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210024774.2A CN114522298B (en) | 2022-01-07 | 2022-01-07 | Micro-injection pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114522298A CN114522298A (en) | 2022-05-24 |
| CN114522298B true CN114522298B (en) | 2024-03-15 |
Family
ID=81621359
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210024774.2A Active CN114522298B (en) | 2022-01-07 | 2022-01-07 | Micro-injection pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114522298B (en) |
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| CN1483481A (en) * | 2002-08-13 | 2004-03-24 | 阿童木医疗有限公司 | Injection pump |
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| CN203885939U (en) * | 2014-05-14 | 2014-10-22 | 傅徐泉 | Portable treatment instrument for keeping blood sugar content of patient stable |
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| CN114522298A (en) | 2022-05-24 |
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