KR101672616B1 - Insulin pump driver installed in a small housing - Google Patents

Abstract

The present invention relates to an insulin pump for supplying insulin to a syringe, driving a piston at a bottom of the syringe, and injecting insulin into the user's skin through a needle through a conduit connected to a connection port of the syringe,
A circular permanent magnet 210 integrally provided on the bottom surface of the piston which generates pressure to inject insulin into the syringe;
A ring-shaped electromagnet 220 coaxially installed with the syringe 21 on the outer circumferential surface of the portion of the syringe 21 that receives the piston 200;
A power transmission mechanism that is installed inside the insulin pump housing 120 to reduce the power of the motor 168 and is disposed in parallel to the syringe so as to reduce the distance between the piston and the insulin pump housing, Providing means 130; And
And a push ring 230 integrally and horizontally installed on the outer circumferential surface of the electromagnet 220 to change the rotational motion of the rotary shaft 131 into a rectilinear motion. In the upward movement of the electromagnet, a piston integral with the permanent magnet And the insulin is supplied to the conduit while moving.

Description

Technical Field [0001] The present invention relates to a small-

The present invention relates to a microinjection pump drive apparatus.

Diabetes mellitus, a typical civilization of the 20th century, is suffering from more than 100 million of the world's population of about 6 billion people. In Korea, 2 million people are estimated to be diabetic, and about 10% of internal medicine patients are diabetic. Until now, diabetes is not a cured disease but a controlled disease. Failure to control can lead to various complications and death. Domestic mortality from diabetes has also increased to 11.5 people per 100,000 population (1990 statistics) and has become a panic disease.

Diabetes is a disease in which blood glucose levels exceed 140mg / dl on fasting or 200mg / dl on 2 hours after meal. The exact cause of such a high blood sugar level is not yet known. The reason for this is that there is an abnormality in insulin assimilation of sugar. Insulin deficiency is caused by insulin secretion from the pancreatic beta cells that do not produce sufficient insulin. Insulin is deficient in the pancreatic beta cells, but insulin is normally secreted by the pancreatic beta cells, but for some reason the action of insulin is lost. The insulin resistance that can not be done is that the blood sugar is increased. Insulin-dependent diabetes mellitus, insulin-dependent diabetes mellitus, insulin secretory insufficiency, but insufficient diabetes mellitus is called "non-insulin-dependent diabetes mellitus" is said to be the middle form. It is not easy to distinguish diabetic patients from insulin-dependent or non-insulin-dependent. Currently, diabetes treatment methods are divided into diet, exercise therapy, drug therapy, and insulin injection, and pancreas transplantation is also being tried.

Insulin injections are a treatment modality for insulin dependent diabetes mellitus, but can also be effective in patients with non-insulin dependent diabetes mellitus. Insulin injections are a common method of injecting insulin once or twice a day, but the amount of insulin secreted in the body is not constant, so it is secreted three times before and after the meal time and is less secreted at other times. This means that the insulin is insufficient for postprandial hyperglycemia. On the contrary, it is hypoglycemia due to high insulin level at night. That is, there is a disadvantage that the insulin supply becomes abnormal and the body becomes abnormal. Therefore, the insulin injection method did not contribute to the prevention of diabetic complications, because the insulin secretion did not change the normal people. Therefore, what is proposed as an improved treatment method is a so-called insulin pump (mechanical artificial pancreas) and a pancreatic beta cell transplantation method which make the amount of insulin injected close to the normal insulin secretion in the human body by controlling by the computer.

In general, a long-term injection automatic syringe (called an insulin pump, an insulin syringe, an insulin automatic syringe, etc.) has a structure in which a push means for pushing a syringe piston is coupled to a housing accommodating a syringe. This can be exemplified by Japanese Laid-Open Utility Model 52-3292 and U.S. Patent No. 4,417,889.

In addition, when the injector is recharged to the syringe after use, the rotary shaft is detached from the housing, and the position is set by looking at the eye easily. Then, the rotary shaft and the pusher 1, a syringe using a conduit 1 connected to a connection port 2 is connected through a lid 110, and a lid 110 is connected to the upper end of the housing 120 As shown in Fig. The housing 120 corresponding to the lid 110 includes a rotation shaft 131 for providing power through a syringe 21 and a piston 122, a piston pushing means 150 and a power providing means 130. The housing 120 is provided with a control button 123 for commanding a control board (not shown), a display 124 such as an LCD displaying a control status, a battery cover 125 for fixing a battery for supplying power, And a reset button 121 for performing a reset function. (140) is a bottom cover.

2 is an enlarged partial perspective view showing a coupling structure of a locking rotation hole 132 formed in a syringe water hole 126 of the housing 120 and a rotation shaft 131 receiving power through the locking rotation hole 132. The housing 120 Detachably coupled to the power providing means housing (130-1); A gear 132-3 which is coupled to the output end of the power providing means 130 and a crisscross groove 134 which is integrally formed with the gear 132-3 and which is detachably engaged with the coupling pin 133 of the separated rotary shaft 131, (132-1); A rotation shaft 131 having an engaging pin 133 which engages and disengages with the cross-shaped groove 132-1 at the bottom and linearly moves the push plate 154 of the pushing means 150; A piston edge protrusion 122-2 that is threadedly engaged with the rotary shaft 131 and guides the push plate 154 along the pushing device guide groove 25 so that the push plate 154 can be moved up and down and a piston edge A piston plate engaging projection 151-1 which engages with the push plate engaging groove 122-3 of the piston plate 122-1 and a piston edge engaging projection 122-2 which is guided along the piston guide groove 27, (122-1); And a syringe 21 for supplying the injected fluid accommodated along the piston 122 to the conduit 1 shown in Fig. The locking rotator 132 and the engaging pin 133 form a coupling means. The power supply means housing 130-1 is formed with a ring-shaped guide ring plate 130-2 having an upper opening and the guide ring plate 130-2 is provided with a cross groove 132- 1) are coupled to each other.

FIG. 3 is an exploded perspective view showing a disassembled rotating shaft 131, a pushing means 150 engaged therewith, a piston 122 and a syringe 21, and FIG. 4 is a cross- The coupling pin 133 is integrally formed at the lower end of the rotary shaft 131 and is coupled to the cross groove 132-1. (cap type) head 131-1. The pushing means 150 is screwed to the rotating shaft 131 so as to be movable up and down. The pushing means 150 includes a push plate 154 that is screwed into the rotation axis 131 in the form of a nut and a push plate guide protrusion 154 projecting horizontally to the push plate 154 and engaged with the pushing means guide groove 25 A push plate coupling protrusion 151-1 that engages with the push plate coupling groove 122-3, an insertion protrusion 155 that is fitted to the piston 122, and a ring formed on the insertion protrusion 155. [ (Not shown). A snap ring wheel 122-4 is formed on the piston 122 corresponding to the snap ring groove 156. [ The piston 122 is coupled to a piston 122 that causes the contents of the syringe 21 to be discharged in a piston action and a piston edge 122-1 is formed at the lower end of the piston 122. The piston edge 122- 1, the piston edge protrusion 122-2 protrudes. The piston edge 122-1 is also formed with a push plate engaging groove 122-3 which is engaged with the push plate engaging projection 151-1.

5 is a block diagram showing an example of the control circuit of such a syringe, a control button unit 123 for giving instructions for control, a control unit 170 for a microcomputer function for recognizing the operation of the control button unit 123, A ROM 165 for storing various data and programs, a motor driver 167 for driving the motor 168 by the control output of the controller 170, A motor 168 whose rotational force is controlled by the motor driving unit 167 and a photocoupler 169 which senses the rotational force of the motor 168 can be exemplified. One preferred example of the controller 170 may include first and second controllers 171 and 172 having the same function so that the function can be continued even if at least one of the controllers 171 and 172 is abnormal. The terminals P1-P5 and P1-P2 'shown in the control units 171 and 172 are ports connected to data and / or bus lines. The motor 168 may be a stepping motor, a servo motor, or the like. As shown in Table 1, the controller 170 scans the insulin for interlocking with a blood glucose level that increases in accordance with a meal time. Using the principle, the controller 170 controls the supply of the insulin injectate.

However, the insulin pump driving apparatus of this type has a structure in which a syringe for receiving the insulin, a piston for pushing the insulin of the syringe, and a rotation axis for providing the advancing and retracting power of the piston are vertically arranged, The height of the piston and the rotation axis for advancing and retreating the piston must be accommodated in a vertical state in the housing so that the height of the housing must necessarily be high enough to accommodate it and the height of the housing can not be reduced below this height .

SUMMARY OF THE INVENTION It is an object of the present invention to provide an insulin pump in which a rotation shaft for transmitting a driving force of a piston of a insulin pump is installed side by side with a syringe to reduce a hook between a piston and an insulin pump housing, It is an object of the present invention to provide a small-sized insulin pump driving apparatus which can simplify a piston driving structure by driving a piston by a magnetic force by a magnet and a permanent magnet.

It is a further object of the present invention to provide a method of inserting a pusher ring having a nut structure interlocking with a rotary shaft and a ring-shaped electromagnet for coaxially moving the syringe to be coupled to the bracket, wherein the guide groove is inserted into the guide groove, So that the precision of the insulin pump driving apparatus can be maintained by allowing the motor to move up and down in a fixed position.

To this end, the present invention provides an insulin pump for supplying insulin to a syringe, driving a piston at the bottom of the syringe, and injecting insulin into the user's skin through a needle via a conduit connected to a connection port at a syringe outlet,

A circular permanent magnet integrally installed on the bottom surface of the piston which generates pressure to inject insulin into the syringe;

A ring-shaped electromagnet provided coaxially with the syringe on the outer circumferential surface of the syringe portion accommodating the piston;

A power supply means provided inside the insulin pump housing for reducing power of the motor and disposed in parallel to the syringe to transmit power to decelerate to a rotary shaft functioning to reduce a distance between the piston and the insulin pump housing; And

And a push ring which is integrally and horizontally disposed integrally with the outer circumferential surface of the electromagnet, the piston moving integrally with the permanent magnet while the electromagnet is lifted, and the insulin is supplied to the conduit Thereby providing an induction pump drive apparatus.

The electromagnet coaxially coaxial with the permanent magnet coupled with the piston and the push ring engaged with the electromagnet are integrally joined by a bracket and the bracket forms a guide groove guiding the up and down movement along a guide vertically installed in the insulin pump housing It is good to do.

As described above, according to the present invention, the rotation shaft for transmitting the driving force of the piston of the insulin pump is installed side by side with the syringe to reduce the distance between the piston and the insulin pump housing according to the installation of the rotary shaft, and the piston action is generated by the magnetic force by the electromagnet and the permanent magnet The piston is driven to simplify the piston driving structure, thereby making it possible to achieve economical efficiency and miniaturization.

The present invention is characterized in that a push ring of a nut construction cooperating with a rotary shaft and a ring-like electromagnet which coaxially moves the syringe are coupled by a bracket, a guide groove is formed in the bracket, So that it is possible to move up and down in a fixed position, so that it is compact and maintains precision.

1 is a perspective view of a conventional Insulin pump,
FIG. 2 is an enlarged cross-sectional perspective view of a main portion of the rotating shaft of FIG. 1,
FIG. 3 is an exploded perspective view of the piston, the piston, the syringe,
Fig. 4 is a cross-sectional explanatory view of the coupling state of Fig. 3,
Fig. 5 is a control block diagram of Fig. 1,
6 is a sectional view showing a configuration of the present invention,
7 is an enlarged explanatory view of the main part of Fig. 6,
8 is a sectional view taken along the line AA in Fig. 7,
9 is a control block diagram of the present invention,
Fig. 10 is a diagram showing the configuration of the sensor unit of Fig. 9; Fig.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

The insulin pump supplies insulin to the syringe (21), drives the piston at the bottom of the syringe (21), and injects the insulin into the user's skin through the needle through the conduit connected to the connection port of the syringe,

A circular permanent magnet 210 integrally provided on the bottom surface of the piston which generates pressure to inject insulin into the syringe;

A ring-shaped electromagnet 220 coaxially installed with the syringe 21 on the outer circumferential surface of the portion of the syringe 21 that receives the piston 200;

A power transmission mechanism that is installed inside the insulin pump housing 120 to reduce the power of the motor 168 and is disposed in parallel to the syringe so as to reduce the distance between the piston and the insulin pump housing, Providing means 130; And

And a push ring 230 integrally and horizontally installed on the outer circumferential surface of the electromagnet 220 to change the rotational motion of the rotary shaft 131 into a rectilinear motion. In the upward movement of the electromagnet, a piston integral with the permanent magnet The insulin is supplied to the conduit while moving.

The electromagnet 220 coaxial with the permanent magnet 210 coupled to the piston 200 and the push ring 230 coupled with the electromagnet 220 are integrally coupled to each other by a bracket 232, Forms a guide groove 234 for guiding the insulin pump housing 120 to move up and down along a guide 240 installed vertically.

The piston 200 coupling the permanent magnet 210 includes a piston sidewall 201 that functions to seal with the inner wall of the syringe 21, a piston upper surface 203 that blocks the upper surface of the piston sidewall 201, And an internal space 202 formed to accommodate the permanent magnet 210 in a space formed by the side wall 201 and the piston upper surface 203.

A reflection plate 253 is attached to the outer side surface of the piston side wall 201 accommodating the permanent magnet 210 and the electromagnet 220 on the ring corresponding to the reflection plate 253 is reflected on the reflection plate 253, A sensor unit 250 including a light emitting unit 251 and a light receiving unit 252 functioning as a recognition sensor is added.

9 is a block diagram showing a control block road of the present invention. The control block 171 includes a motor 168 for forwarding power to the rotary shaft 131 via the power providing means 130, A photocoupler 169 for recognizing the number of rotations of the motor 168 and applying the number of rotations of the motor 168 to the control unit 171 and a photocoupler 169 for connecting the terminal P10 of the control unit 171 in conjunction with the rotation axis 131. [ And an electromagnet driving unit 260 for generating a magnetic force to the electromagnet 220 by a command through the control unit 171 and a terminal S of the control unit 171 in cooperation with the permanent magnet 210 when the electromagnet driving unit 260 is driven And a sensor unit 250 having a light emitting unit 251 and a light receiving unit 252. Reference numeral 124 denotes a display unit that indicates the operation status of the control unit 171, and 123 denotes a control button unit that instructs the control unit 171 to operate.

10 is a diagram showing an example of the sensor unit 250 according to the present invention. The sensor unit 250 includes a light emitting unit 251 that is a light emitting diode that is lit through a terminal S1 constituting a terminal S of the control unit 171, The reflection plate 253 formed on the outer wall of the piston side wall 201 of the piston 200 fixing the permanent magnet 210 and the light reflected by the reflection plate 253, And a light receiving section 252 which is a phototransistor for recognizing at the terminal S2. Convenience of explanation In Fig. 9, the terminal S is divided into the terminal S and the terminal S in Fig. 10, and the terminal S is divided into the terminals S1 and S2.

When the piston 200 having the permanent magnet 210 is inserted into the syringe 21 and the insulin solution is filled in the syringe 21 as an inlet through the rotation of the rotary shaft 131 by the driving force of the motor 168 at the outlet side, (The process of filling the insulin solution can be variously performed manually or automatically, so that a specific example is omitted and the connection needle 2 and the lid 110 are combined to insert the needle into the abdomen of the user to supply insulin The process description is omitted).

The control unit 171 drives the electromagnet driving unit 260 and simultaneously drives the power providing unit 130 in the forward rotation state through the motor driving unit 167 at a time set according to the meal time. Here, the term " forward rotation " means that the rotation shaft 131 rotates in a forward direction, and therefore, the relatively screwed push ring 230 is raised as shown in FIG. 7 in the state of FIG.

The reason why the piston rises together with this synergistic action is that when a current flows through the electromagnet 220, a magnetic field is generated by the right-hand rule of Freming, and such a magnetic field acts as an electromagnet. When the electrodes of the electromagnets generate a magnetic force opposite to the polarity of the permanent magnet 210 as shown in FIG. 6, mutual attractive force is generated. This attraction force works in conjunction with the rotation axis 131 and acts as a pulling force to raise the corresponding permanent magnet 210 together when the push ring 230 is lifted.

The piston side wall 201 acts on the side surface of the permanent magnet 210 as a piston, so that the insulin inside the syringe 21 is discharged to the outlet.

If the insulin discharging is stopped by the external impact or pressure during the discharge of the insulin solution, the push ring 230 and the electromagnet 220 are raised by the rotation shaft 131, but the pressure inside the syringe 21 is increased, (200) do not rise together. Then, the electromagnet 220 and the permanent magnet 210 are not horizontal, and the sensor unit 250 operates as shown in FIGS. Since the light from the light emitting portion 251 is not reflected through the reflection plate 253, the light receiving portion 252 is turned off, and when the terminal S2 of the control portion 171 changes from the low level to the high level, 250) is operated, the operation of the rotary shaft 131 is stopped, and an alarm signal is generated so that the user is guided to be confirmed by the doctor, thereby ensuring safety from malfunction in use.

1, a piston 2, a connecting hole 21, a syringe 25, a pushing means guide groove 27, a piston guide groove 110, a lid 120, an insulin pump housing 121, a reset button 122, a piston 122-1, a piston edge 122-2, 3, a push plate coupling groove 122-4, a snap ring wheel 123, a control button portion 124, a display portion 125, a battery cover 126, a sillin index slot 130, a power providing means 130-1, a power providing means housing 130-2, A pushing plate coupling protrusion 151, a push plate 150, and a pressing plate 150. The pushing plate 150 includes a pushing plate 150, And a second control unit 200. The piston 201 and the piston side wall 202 are coupled to each other by a guide member (not shown), and the guide protrusion 154, the push plate 155, the insertion protrusion 156, the snap ring groove 165, the ROM 168, the motor 167, the motor drive unit 169, the photocoupler 170, The inner space 210, the permanent magnet 220, the electromagnet 230 on the ring, the push ring 232, the bracket 234, the guide groove 240, the guide 250, the sensor portion 251, the light emitting portion 252, the light receiving portion 253,

Claims (4)

In an insulin pump that supplies insulin to the syringe and drives the piston at the bottom of the syringe to inject the insulin into the user's skin through the needle through the conduit connected to the connection port at the syringe exit,
A circular permanent magnet 210 integrally provided on the bottom surface of the piston 200 which generates pressure to inject insulin into the syringe;
A ring-shaped electromagnet 220 coaxially installed with the syringe 21 on the outer circumferential surface of the portion of the syringe 21 that receives the piston 200;
A power transmission mechanism that is installed inside the insulin pump housing 120 to reduce the power of the motor 168 and is disposed in parallel to the syringe so as to reduce the distance between the piston and the insulin pump housing, Providing means 130; And
And a push ring 230 integrally and horizontally installed on the outer circumferential surface of the electromagnet 220 to change the rotational motion of the rotary shaft 131 into a linear motion;
The electromagnet 220 coaxial with the permanent magnet 210 coupled to the piston 200 and the push ring 230 coupled with the electromagnet 220 are integrally coupled to each other by a bracket 232, Forms a guide groove 234 for guiding the insulin pump housing 120 to move up and down along a guide 240 installed vertically;
A reflection plate 253 is attached to the outer side surface of the piston side wall 201 accommodating the permanent magnet 210 and the electromagnet 220 on the ring corresponding to the reflection plate 253 is reflected on the reflection plate 253, Adding a sensor unit 250 including a light emitting unit 251 and a light receiving unit 252 functioning as a recognition sensor;
Wherein when the electromagnet is moved upward, the piston integral with the permanent magnet moves while insulin is supplied to the conduit.
delete The piston according to claim 1, wherein the piston (200) coupling the permanent magnet (210) comprises a piston sidewall (201) functioning to seal with the inner wall of the syringe (21) And an internal space 202 formed in the space formed by the piston side wall 201 and the piston upper surface 203 so as to accommodate the permanent magnet 210. delete

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