JPH08317971A - Infusion pump - Google Patents

Abstract

PURPOSE: To realize a waterproof structure for an electric circuit constituting part of an infusion pump equipped with a battery and simultaneously to allow the battery to appropriately charge and to suitably mount to its electric power supply. CONSTITUTION: In an infusion pump equipped with a built-in battery 14 for electric power supply, a receiving transformer 12 for electromagnetic wave transmitted from a transmission transformer of the electric power supply unit and an electric power receiving circuit 37 for converting the receiving current from the receiving transformer 12 to direct current are equipped so that the direct current is used for driving the infusion pump and charging the built-in battery 14.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an infusion pump which realizes a waterproof structure for an electric circuit forming portion of an infusion pump equipped with a battery, and which appropriately charges a battery and properly operates a power supply unit. .

[0002]

2. Description of the Related Art Infusion pumps used in hospitals and ambulances, etc. are installed below drug solution bags and bottles hung on a hanging rod of a stand. become. For this reason, in many infusion pumps, the operation surface thereof is protected by a waterproof structure such as a key sheet to prevent a spill of the chemical solution from entering a contact such as a switch.

However, the commercial power supply in the infusion pump has a structure in which a power outlet on the side of the infusion pump and a power outlet on the side of the power transmission are connected by a connector, so that a spill of the chemical liquid enters the connector portion. There was a risk of a short circuit, which could cause a serious accident of the infusion pump.

The infusion pump used in home medical care has a structure incorporating a rechargeable battery in consideration of portability. In such a home-use infusion pump, there is a risk that the infusion pump may fall into a bath or toilet due to a user's mistake. A connector structure is indispensable as a power supply connection port, which has been an obstacle to realizing a waterproof structure for an infusion pump.

Further, the infusion pump used in the above hospitals and ambulances has a structure in which a battery can be connected in preparation for a power failure, etc., and has a built-in battery so that it can be used even while the infusion pump is moving. The structure tends to be changed. Therefore, even in the infusion pump with a built-in battery used in such hospitals and ambulances, a connector structure for battery charging is required as in the infusion pump for home use described above. Made the waterproof structure of the device impossible.

Further, in an infusion pump equipped with a battery, proper charging of the battery is an inevitable requirement for ensuring the safety of treatment.

[0007] For example, in an electric toothbrush or the like, since the usage time is short and the battery can be charged over a long period of time, the battery can be charged without difficulty and the risk of overcharging is low.

On the other hand, in the infusion pump, it is necessary to charge in a short time between long-term use, and therefore overcharge is likely to occur. Therefore, in such an infusion pump, a trouble caused by shortening the life of the battery is not caused by the device itself but by the overcharge of the battery, or overdischarge caused by a long unused state of the battery. Is the current situation.

In view of the above, in a medical device such as an infusion pump having a rechargeable battery, a control circuit for preventing troubles due to overcharge or overdischarge is enriched, or a loaded battery is used for charging. It is necessary to establish a double or triple safety structure that detects whether or not the battery is a standard battery of No. 3 and detects the warning, and further detects proper operation of the charger.

[0010]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and a connector for supplying power in order to make an electric circuit constituting portion of an infusion pump completely waterproof. An object of the present invention is to provide an infusion pump in which the structure is abolished and the required amount of electric power for the built-in battery is transmitted in a contactless manner from the power supply side to the battery on the infusion pump side in a contactless manner.

The present invention also includes a control circuit for protecting the battery life shortening due to overcharging and overdischarging by appropriately charging the built-in battery, and preventing charging of a nonstandard battery. Another object of the present invention is to provide an infusion pump adapted to detect whether or not the infusion pump is properly attached to the charger.

[0012]

In order to achieve the above object, the infusion pump of the present invention is an infusion pump having a built-in battery for power supply, which receives an electromagnetic wave transmitted from a power transmission transformer on the power supply side. And a power receiving circuit for converting a power receiving current of the power receiving transformer into a direct current, and the direct current is used for charging a drive source of the infusion pump or an internal battery. Is characterized by.

[0013] It is preferable that the power receiving circuit on the infusion pump side is provided with a signal transmitting / receiving unit for transmitting a control signal to the power supplying side in a non-contact manner to adjust the output to the power receiving transformer.

Further, it is preferable that a non-contact detecting means for detecting a normal operation position between the unit on the power supply side and the unit on the infusion pump side is provided.

Further, the operating part and the electric circuit forming part of the infusion pump are covered with a waterproof casing to be hermetically sealed so that the electric circuit forming part is waterproofed and prevented from inundation. Is preferred.

[0016]

Since the present invention is configured as described above, power is supplied from the power transmission transformer on the power supply side to the power receiving transformer on the infusion pump side by exchanging electromagnetic waves. It is possible to configure a non-contact waterproof structure with the infusion pump side, the receiving current of the power receiving transformer is converted into a direct current on the infusion pump side, and this direct current is supplied to the drive source of the infusion pump or the internal battery. It can be used for charging.

Further, since the control signal from the power receiving circuit on the infusion pump side can be transmitted to the power supplying side in a contactless manner to adjust the output to the power receiving transformer, the charging power can be increased or decreased according to the power capacity of the battery. However, efficient and safe management from quick charge to charge restriction can be executed, and the shortening of the battery life due to overcharge and overdischarge can be protected. Further, since the normal operating positions of the power supply unit and the infusion pump can be detected, double safety for proper charging can be secured.

Further, by enclosing and sealing the operation portion and the electric circuit constituent portion of the infusion pump with a waterproof casing, the electric circuit constituent portion can be waterproofed and prevented from inundation.

[0019]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing an internal circuit of the power supply unit according to the present invention. FIG. 2 is a block diagram showing an internal circuit of the infusion pump according to the present invention. FIG. 3 is a plan view showing the internal structure of the lower case of the infusion pump unit showing the embodiment of the present invention. FIG. 4 is a plan view showing the internal structure of the upper case of the infusion pump unit showing the embodiment of the present invention. FIG. 5 is a plan view showing the back surface situation of FIG. FIG. 6 is a vertical cross-sectional view showing a state in which the infusion pump unit of the present invention is attached to a power supply unit. FIG. 7 is a perspective view showing a situation in which the infusion pump unit of the present invention is attached to the power supply unit.

The circuit configuration in the power supply unit 10 will be described with reference to FIG. 1. The commercial power source flowing through the power outlet 27 passes through the AC inlet 20 connected to the power outlet 27 and the fuses F1 and F2 and the power circuit 31. Take in. A high frequency transmitting circuit 32 and a power supply control signal receiving circuit 33 are connected to the power supply circuit 31. The power supply circuit 31 is connected to a power supply lamp 31a for notifying whether or not the power supply is properly performed.

The high frequency transmission circuit 32 is connected to a power transmission transformer 13 formed by winding a coil around a bobbin, and the power supply circuit 3
The current from No. 1 is converted into a high frequency (50 KHZ) so that it can be easily emitted into the air as an electromagnetic wave. The high frequency signal transmitted from the power transmission transformer 13 is transmitted to the power receiving transformer 12 in the infusion pump unit 1 shown in FIG.

Further, the photodiode 17 is connected to the power supply control signal receiving circuit 33, and the infrared ray LE is passed through the power supply control signal transmitting circuit 34 on the side of the infusion pump unit 1 which will be described later.
The PWM signal emitted from D16 is applied to the photodiode 1
Light is received at 7, and the power supply output in the power supply circuit 31 is controlled to flow a predetermined current through the power transmission transformer 13.

Next, the infusion pump unit 1 will be described with reference to FIG.
The circuit configuration of the power supply unit 10 will be described. The power receiving transformer 12 is formed by winding a coil around a bobbin.
The electromagnetic wave transmitted from the power transmission transformer 13 on the side is received by the power receiving transformer 12, and is converted into a direct current by the power receiving circuit 37 connected to the power receiving transformer 12.

The power receiving circuit 37 is connected to the power supply circuit 38 and the charging control circuit 36.

The power supply circuit 38 is connected to the motor 3 as well as to the CPU 35, and the power supply control signal transmission circuit 34 is connected to the CPU 35. Further, the charge control circuit 36 is connected to the battery 14, detects the current charged in the battery 14, sends a signal to the CPU 35, and outputs C
The PU 35 outputs a power supply control signal to the power supply circuit 38 so that an appropriate charging current is obtained, and the current from the power supply circuit 38 is sent to the electric motor 3.

The power supply control signal transmission circuit 34 includes a CPU 35.
It is a circuit that converts the PWM signal for power control, which is created in, into infrared rays and sends it to the power supply side. The infrared LED 16 is connected to the power supply control signal transmission circuit 34, and the infrared signal is emitted toward the photodiode 17 of the power supply unit 10 arranged opposite to the infrared LED 16.

The charging control circuit 36 detects the power capacity of the battery 14, and at the same time, supplies the charging power controlled by the power control signal receiving circuit 33 of the power supply unit 10 to the charging current according to the power capacity of the battery 14. Increase or decrease,
By performing efficient charging from quick charging to charging limitation, the shortening of the life of the battery cell due to overcharging and overdischarging of the battery 14 is protected.

Further, the CPU 35 controls the power supply voltage in order to determine whether or not the battery 14 is a rechargeable secondary battery. As a result, the battery storage unit 14
It is possible to determine whether the battery loaded in a is a non-chargeable primary battery or a rechargeable secondary battery. Further, when the battery loaded in the battery storage portion 14a is out of the standard, the battery may not be charged, and the fact may be notified by an alarm or a target. .

As described above, the power transmission transformer 13 on the side of the power supply unit 10 and the power receiving transformer 12 on the side of the infusion pump unit 1 can supply electric power by exchanging electromagnetic waves with each other, and the infrared LED on the side of the infusion pump unit 1 can be supplied.
16 and the photodiode 17 on the side of the power supply unit 10
Since the power supply amount is controlled by transmitting and receiving infrared rays, the infusion pump unit 1 and the power supply unit 10 can be connected to each other by a non-contact structure without the need for a connector structure. It is possible to provide a waterproof structure in which the electric circuit constituent part of the pump unit 1 is covered with a waterproof housing.

Next, a concrete embodiment in which the infusion pump 1 and the power supply unit 10 having the above-described circuit configurations are incorporated in respective housings will be described.

In FIG. 3, an electric motor 3 is fixedly installed in the lower case 2 of the infusion pump unit 1, and a rotor 4 is provided above the electric motor 3.

The rotor 4 has a rotating shaft 4 as shown in FIG.
A plurality of rollers 5 are provided around a and are connected to the output shaft 3a of the electric motor 3 via a bevel gear 6 provided on the lower surface of the rotor 4. By rotating the rotor 4 by driving the electric motor 3 with the tube 9 attached to the rotor 4 and the stator 8 forming the facing wall of the rotor 4,
The plurality of rollers 5 can press the tube 9 while rotating the tube 9 to transfer the drug solution in the tube 9.

Further, as shown in FIG. 3, in the lower case 2, the power receiving transformer 12, the main body detecting magnet 15 and the infrared LE are provided.
D16 is fixed. As shown in FIG. 6, these electric components are respectively arranged at positions facing the power transmission transformer 13, the magnetic sensor 18, and the photodiode 17 of the power supply unit 10, which will be described later, and as shown in FIG. It is provided inside a waterproof insulating cover 11a provided on the back surface of the lower case 2 and is insulated from the outside.

Further, as shown in FIG. 5, a battery storage portion 14a having a predetermined electrode is provided on the rear surface side of the lower case 2, and the battery storage portion 14a has a rechargeable secondary battery, For example, a battery 14 such as a NiCd battery can be stored. Although a commercially available dry battery (primary battery) can be loaded and used in the battery storage portion 14a in case the battery of the battery 14 runs out, it is possible to charge the primary battery by mistake. In addition, for the electrodes of the battery storage portion 14a, the CPU shown in FIG.
A voltage from 35 is applied to determine whether the battery 14 is a rechargeable secondary battery.

It should be noted that positive and negative displays 14b are shown so that the electrodes of the battery 14 can be loaded in the battery storage portion 14a without error.

The internal structure of the upper case 7 of the infusion pump unit 1 will be described with reference to FIG. 4. An opening 5 for exposing the roller 4 is provided in the upper case 7 and is turned on at a side portion of the upper case 7. The OFF switch 21 is provided, and the start key 22 and the operation display LED 2 are provided on the upper surface of the upper case 7.
3, an up key 24, a down key 25, a liquid crystal display 26 and the like are provided.

Further, as shown in FIG. 6, a control board 19 having an electric circuit as shown in FIG. 2 is provided inside the liquid crystal display 26 of the upper case 7 to connect the various electric parts described above. Has been done.

The lower case 2 and the upper case 7 as described above are fitted and fixed to each other with screws or the like to form the casing of the infusion pump unit 1. As shown in FIG. A ring-shaped waterproof packing 3b is provided on the outer circumference of the part, the entire outer circumferences of the lower case 2 and the upper case 7 are surrounded by an insulating cover 11a, and the upper case 7 and the lower case 2 other than the mounting portion of the rotor 4 are combined. Waterproof packing on the surface 2
Since the a and the groove 7a are provided, the lower case 2 and the upper case 7 are fitted and fixed to each other, so that the infusion pump unit 1 includes the electric motor 3, the power receiving transformer 12, and the battery 1.
4. It is configured to have waterproof performance against electric parts such as the control board 19 and the like.

The internal structure of the power supply unit 10 will be described with reference to FIG. A power transmission transformer 13 is fixedly installed in the power supply unit 10 at a position facing the power reception transformer 12 in the lower case 2. The power transmission transformer 13 is also covered with an insulating cover 11b enclosing the power supply unit 10. There is. Therefore, when the infusion pump unit 1 is mounted on the power supply unit 10 as shown in FIG.
Insulation cover 1 for power receiving transformer 12 and power transmitting transformer 13
It is opposed via 1a and 11b.

Further, the power supply unit 10 is provided with an AC inlet 20 and is connected to the power supply circuit 31.

Further, the power supply unit 10 is provided with a magnetic sensor 18 such as a Hall element and faces the main body detection magnet 15 on the side of the infusion pump unit 1 described above.

A photodiode 17 is fixedly provided in the power supply unit 10 at a position facing the infrared LED 16 of the lower case 2.

As shown in FIG. 7, the power supply unit 10 having the above internal structure is provided with a holding cover 40 for operating the infusion pump unit 1, and the AC inlet 20 is provided below the holding cover 40. Since the accommodated overhanging portion 41 is provided, by inserting the infusion pump unit 1 into the operation space 40a inside the holding cover 40, the both are joined at a fixed position.

Further, in order to determine whether or not this combined state is proper, the magnetic sensor 18 is provided on the wall surface of the operation space 40a of the power supply unit 10, and the magnetic sensor 18 and the infusion pump unit 1 are provided. It is possible to detect whether or not the main body detection magnet 15 on the back surface of the device faces the same position.

In addition to the above-mentioned means, ultrasonic waves or the like can be similarly used for the above-mentioned operation detection and transmission / reception of the power supply control signal.

[0047]

As described above, in the infusion pump of the present invention, the electric power necessary for operating the infusion pump is the electromagnetic wave transmitted from the power transmission transformer on the charger side and received by the power receiving transformer on the infusion pump unit side. Since the battery is received and charged to the battery, the connector power supply of the infusion pump unit is completely abolished and the electric circuit component of the infusion pump can be made waterproof by supplying electric power by electromagnetic waves, This makes it possible to prevent and protect the infusion solution for medical treatment from infiltration of the infusion pump for medical treatment, particularly the infusion pump for portable use, to complete the treatment.

Further, according to the infusion pump of the present invention, the power supply amount to the battery of the infusion pump is controlled by the power supply control signal receiving circuit on the power supply side, so that the charging power is increased or decreased according to the power capacity of the battery, You can perform efficient and safe charge management from quick charge to charge limit,
This protects the shortening of the battery life due to overcharging and overdischarging, and contributes to the treatment.

Further, it is possible to determine whether or not the battery is a rechargeable battery. If a non-rechargeable battery is attached to the infusion pump, charging is not performed, and an alarm or a lamp is used to notify that fact. You can

Furthermore, in order to perform proper operation for proper charging, the operation detection means of the infusion pump is provided as means for detecting a reliable connection to maintain double safety and improper operation. Then, by preventing generation of electromagnetic waves for power supply, safety protection of the power supply circuit can be performed.

[Brief description of drawings]

FIG. 1 is a block diagram showing an internal circuit of a power supply unit according to the present invention.

FIG. 2 is a block diagram showing an internal circuit of the infusion pump according to the present invention.

FIG. 3 is a plan view showing the internal structure of the lower case of the infusion pump unit according to the embodiment of the present invention.

FIG. 4 is a plan view showing an internal configuration of an upper case of an infusion pump unit showing an embodiment of the present invention.

FIG. 5 is a plan view showing the back surface situation of FIG. 3;

FIG. 6 is a vertical cross-sectional view showing a state in which the infusion pump unit of the present invention is attached to a power supply unit.

FIG. 7 is a perspective view showing a state in which the infusion pump unit of the present invention is attached to a power supply unit.

[Description of sign]

 DESCRIPTION OF SYMBOLS 1 ... Infusion pump unit 2 ... Lower case 3 ... Electric motor 4 ... Rotor 7 ... Upper case 8 ... Stator 10 ... Power supply unit 11a ... Insulation cover of lower case of infusion pump unit 11b ... Insulation cover of power supply unit 12 ... Power reception Transformer 13 ... Power transmission transformer 14 ... Battery 15 ... Main body detection magnet 16 ... Infrared LED 17 ... Photodiode 18 ... Magnetic force sensor 31 ... Power supply circuit 32 ... High frequency transmission circuit 33 ... Power supply control signal reception circuit 34 ... Power supply control signal transmission circuit 35 ... CPU 36 ... charge control circuit 37 ... power receiving circuit

Claims (4)

[Claims] 1. An infusion pump having a built-in battery for supplying power, a power receiving transformer for receiving an electromagnetic wave transmitted from a power transmitting transformer on the power supplying side, and power for converting a power receiving current of the power receiving transformer into a direct current. An infusion pump having a receiving circuit, wherein the direct current is used to charge a drive source of the infusion pump or an internal battery. 2. A transmission / reception unit for transmitting and receiving a control signal from the power receiving circuit on the side of the infusion pump to the power supply side in a contactless manner to adjust the output to the power receiving transformer. The infusion pump according to 1. 3. The infusion pump according to claim 1, further comprising non-contact detection means for detecting a normal operation position between the unit on the power supply side and the unit on the infusion pump side. 4. The operating unit and the electric circuit forming unit of the infusion pump are covered with a waterproof casing to be hermetically sealed so that the electric circuit forming unit is waterproofed and prevented from flooding. The infusion pump according to claim 1, wherein