JP3170485B2 - Portable automatic syringe and needle unit - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a portable automatic injector and an injection needle unit capable of injecting a long time injection, and more particularly, to separating a screw rotary shaft having a function of providing a driving force of an automatic injector to a piston. The present invention relates to a portable automatic injector which can be used by refilling an injection solution of a syringe, separating a piston and a screw rotary shaft together from a syringe housing, setting them in an original position, and then reconnecting them to the housing. Things. Further, the present invention provides an injection needle unit having a curved portion at an upper end portion of the injection needle to have a shock absorbing force. Further, the present invention provides an injection needle unit in which a sensor for detecting glucose is integrally formed with the injection needle, and a syringe using the same.

[0002]

2. Description of the Related Art Generally, a long-time injection automatic injector has a structure in which a push means for pushing a syringe piston is connected to a housing for accommodating an injection syringe.
Such an automatic injector is disclosed, for example, in Japanese Utility Model Laid-Open No. 52-3292 and U.S. Pat. No. 4,417,889. Japanese Utility Model Application Laid-Open No. 52-3292 has a disadvantage that it has a double case and is inconvenient to carry because of a structure in which a syringe inlet is installed outside the basic case. In this case, a syringe without a double case was developed. As shown in Fig. 1, the output of the oscillator (vibrator) (A1) is provided to the timer (A2), and the output of the timer (A2) and the switch (A4) The output is provided to the digital comparator (A3). The output of digital comparator (A3) is counter (A6) and flip-flop (A9)
Provided to The output of other oscillators (A5) is counter (A6), AND gate (A10) (A11) and counter (A13)
Provided to The output of the digital comparator (A7) resets the flip-flop (A9), and the output of the digital comparator (A14) resets the flip-flop (A16). The control unit (A17) is a manual switch
It is linked to operate the counter (A13) by the operation of (A12). The output of the control unit (A17) is provided to counters (A13), (A16), and (A21). counter
The output of (A21) is given to the digital comparator (A22), and the output of this digital comparator (A22) is a step motor drive that drives the step motor (A20).
(A19). The output of the flip-flop (A16) is input to one input stage of the AND gate (A11).
The output of the oscillator (A5) is input to another input stage (A11). The output of the AND gate (A11) is provided to one input stage of the OR gate (A18). Each fixed number of switches (A4, A8, A15, A25) has five inserting bars (protruding insert bars) and corresponding digital comparators (A3, A7, A14, A22) Performs the function of providing a reference value. The light source (A24) and photo sensor (A23) counter the sensing result (A21).
The light source (A24) and the photo sensor (A23) are installed with a gear plate interposed therebetween, as shown in FIGS. As shown in FIG. 3, the gear plate has many holes.
(holes) (A26) are formed at regular circumferential intervals.
A gear shaft (A27) is fitted and fixed to this gear plate.
The piston plate (A28) is screwed so as to be able to move up and down with respect to the gear shaft (A27). Above light source (A2
4) and the photo sensor (A23) are located above and below the hole (A26), and are installed on a separate fixed plate at an interval from the gear plate. An example of a structure including all the configurations can be illustrated as shown in FIG. 2, wherein a light source (A24) and a photo sensor (A23) are installed at an upper part of the housing, and a light source (A24) and a photo sensor ( The gear mechanism (G) is installed on the horizontal line between A23), and the gear mechanism (G) is driven by the motor (M). The motor (M) is driven by a counter (A21), digital comparator (A22), switch (A2
5) and controlled by motor drive (A19). The gear plate (A27) of the gear mechanism (G) has a piston plate (A2
8) is screwed in the form of a nut, and the piston plate (A2
When 8) slides, the injection solution (insulin) in the syringe (I) is injected from the injection needle (N). However, in such a structure, since the syringe is exposed to the outside air, moisture, moisture, and the like easily permeate. For this reason, when the user of the syringe takes a shower during an injection, for example, there is an inconvenience that the user must take a shower after storing the housing in a separate sealing case.

[0003] For this purpose a sealable syringe has been proposed by the applicant. FIG. 4 is a front view of the automatic injector showing such an example. A cover (10) and a bottom cover (40) are sealingly connected to an upper end and a lower end of a housing (20), respectively. The connector (2) integrated with the conduit (1) is screwed. The connector (2) is in electrical communication with the syringe (21), into which the piston (22) is slidably inserted and contains the injection solution. Power supply means (30) is housed at the bottom of the housing (20), and the power supply means (30) has a screw rotation shaft (31) having a male screw over the entire outer peripheral surface thereof. )
The disk-shaped push means (50) is screw-connected to. The disk-type push means (50) moves vertically by the rotation of the screw rotation shaft (31), so that the piston (22) moves in the same direction.

FIG. 5 is a plan view of FIG. 4, in which the cover (10) is located on the left side of the surface of the housing (20), and the battery lid (2) is on the right side.
4) is installed. A connector (2) connected to the conduit (1) is connected to the cover (10).

FIG. 6 is an exploded sectional view taken along the line AA of FIG.
At the center of (10) is a screw hole for screw connection with the connector (2)
(11), a bolt screw part (12) for sealingly connecting the syringe storage space (23) and a packing (13) on the outer periphery. A push means guide groove (25) into which a push means guide projection (51) for guiding the ascending and descending of the push means (50) is formed on the lower inner surface of the housing (20) forming the syringe storage space (23). Further, a piston guide groove (27) for guiding the ascent of the piston (22) shown in FIG. 4 is formed.

FIG. 7 shows a power supply means (30) fitted in the syringe storage space (23) shown in FIG. 6 and a disc-shaped push means (50) screw-connected to a screw rotation shaft (31). The push means (50) has a push means guide groove shown in FIG.
(25) a lower disk (54) having a push means guiding projection (51) fitted so as to be vertically movable, and a piston (22)
And an upper disk (55) integral with the lower disk (54) and having an uneven means (52) for supporting the piston and resting the piston (22). The power providing means (30) includes a reduction mechanism (33) for reducing the rotational force of the motor and providing the reduced rotational force to the screw rotating shaft (31). The upper disk (55) is fitted on a sleeve plate (26) fixed to the lower end of the piston (22), and the concave / convex means (52) is engaged with the engagement portion of the sleeve plate (26). The sleeve plate (26) has a projection that fits into the piston guide groove (27). A jig fitting groove (not shown) is formed in the upper disc (55) or the lower disc (54), and the push means guide projection (51) enters toward the center when the jig is fitted in the jig fitting groove. Structure.

When this is used, the piston (2) is inserted into the syringe (21) shown in FIG.
2) is inserted, a separate disposable injection needle (not shown) attached to the tip (21-1) of the syringe (21) is pierced into the stopper, and then the piston (22) is pulled and the injection solution (for example, Insulin) is stored in the syringe (21).

In this state, the piston (22) is pushed inside the syringe storage space (23) shown in FIGS.
The cover (10) is screwed to the upper end of the syringe storage space (23). Cover the connector (2) in this state
When the connector (2) is screw-connected to (10), the connector (2) is naturally connected to the syringe tip (21-1). Accordingly, in the sealing state, the contents of the syringe (21) are automatically injected by the operation of the push means (50). At this time, the push means (50) has the push means guide projection (51) connected to the push means guide groove (25) of the syringe storage space (23), and the piston guide projection shown in FIG.
(26) moves along the piston guide groove (27) shown in FIG.
The piston (22) rises correctly.

However, in this device, the syringe is discarded each time the liquid medicine in the syringe is exhausted, and after a new syringe (21) is filled with the injection liquid, the push means (50) is connected with the piston (22) in a state of being connected. The lower disk (54) to be formed is adjusted to the height of the upper disk (55), and the piston (22) is placed on the upper disk (55).
There is a problem that it is difficult to set the initial position.

On the other hand, FIG. 9 shows an example of a portable automatic injector capable of injecting for a long time, which comprises a "1" -shaped horizontal injection needle member (also referred to as a "1-shaped butterfly injection needle member") (3) and a conduit. (Transfer tube) (1) and connector (2).

However, the above-mentioned one-shaped butterfly injection needle member (3) is used when the user directly pierces his own skin.
The pain is great because you will overlook the site to be stabbed. In other words, insulin, which is mainly used as a long-term syringe injection, is injected directly into the body by a diabetic patient by inserting a needle directly into the body, while a single-shaped butterfly needle is directly used by the user on his / her body (skin). Since it is obliquely inserted, it must be confirmed directly with the eyes when inserting, and it is not comfortable.

Further, since the above-mentioned one-shaped butterfly injection needle member (3) has to be inserted obliquely when injecting into the skin tissue, the tip of the injection needle is easily clogged with the cell tissue. That is, since the skin tissue has a layered structure of cells, the tip of the injection needle is liable to be clogged at the time of injection, and for example, there is a disadvantage that insulin is not supplied smoothly.

Further, since the single-shaped butterfly injection needle member (3) is obliquely pierced into the skin tissue, it is likely to shake and damage the skin tissue, causing bleeding or severe pain.

As described above, the injection needle unit having the single-shaped butterfly injection needle member (3) is obliquely pierced into the skin tissue, so that the injection needle is easily clogged by the cell tissue, and further, the insulin is not smoothly introduced, so that the conduit is not easily inserted. The diameter of (1) must be increased. This leads to a waste of insulin, which is expensive due to excessive penetration of insulin. That is, the air in the conduit (1) and the needle member (3) must be completely removed before piercing the injection needle to supply insulin. For this reason, insulin is fed by pumping of the automatic insulin injector, and the air in the conduit (1) and the injection needle member (3) is discharged to the outside of the housing (20). Large diameters waste large amounts of insulin and therefore increase manufacturing costs.

Further, since the connector (2) is configured so as to be simply inserted into the connector portion (20-5) of the insulin automatic injector housing (20) in a linear direction and connected thereto, during use, the There is a risk of falling off.

Due to such a problem, FIGS.
As shown in (2), when an injection needle unit was developed that can be bent into an L-shape and directly inserted into the skin and used, this is made up of the injection needle member (3), the conduit (1) and the connector (2). It becomes.

The injection needle member (3) is formed in an L shape having an injection needle portion (3-11) and a connection rib (3-12).
-12), the above-mentioned conduit (1) is connected and formed integrally. The injection needle portion (3-11) connected to the connection rib (3-12) has a substantially horizontal portion and an injection tip at a tip substantially perpendicular to the horizontal portion when connected to the conduit (1) as shown in FIG. It has a vertical part, and a bent part (3-13) is formed in a substantially horizontal part. The injection needle portion (3-11) is integrally formed with a pressing piece (3-14) that can be pushed when the injection needle portion is inserted into the skin. This press piece (3
At the front (skin side) of -14), a bacterial infection prevention member (3-14-1) made of a nonwoven fabric that has been disinfected is fixed. It is preferable to use natural wood pulp as a material for the bacterial infection preventing member (3-14-1). The conduit (1) has a smaller diameter and a longer length than that of FIG. The connector (2) connected to the other end of the conduit (1) is formed with a male thread (2-15) so as to be coupled with a protective cap (2-17) having a female thread (2-16). To Furthermore, in order to connect the connector (2) with the connector (20-5) of the housing (20) of the insulin automatic injector, the connector (20-5) has a female screw (20-5a).
Are formed. Reference numeral (3-18) in FIG. 10 denotes an injection needle protection cap.

In order to receive the supply of insulin from the housing (20) of the automatic insulin injector using the injection needle unit configured as described above, first, the protective cap (2-1)
Remove 7) and connect the connector (2) with the connector (20-5) with screws. Next, the injection needle protection cap (3-18) inserted into the injection needle portion (3-11) is removed. Thereafter, while pressing the pressing piece (3-14) with a fingertip, it is stabbed into the skin tissue of the user. On this occasion,
Since the injection needle (11) has an L shape, it can be pierced vertically into the skin tissue, and the user does not need to visually confirm that the injection needle is pierced, without much pain. It can be inserted instantaneously and can be conveniently used as shown in FIG. In addition, injection needle member
As (3) is configured in an L shape and inserted vertically,
Since there is no possibility that the tip of the injection needle (3-11) is clogged by the layered skin tissue, the supply of insulin can be made smooth. As described above, since the insulin can be smoothly supplied, the diameter of the conduit (1) can be reduced, and the length thereof can be increased. By reducing the diameter of the conduit (1), the conduit (1)
When the air in the injection needle part (3-11) is removed, waste of insulin can be minimized, and further cost saving can be expected. As shown in FIG. 13, there are a wide range of choices for a stab at the time of use, which is convenient for use. When the injection needle part (3-11) is inserted into the skin tissue and insulin is supplied by fixing a sterilized natural nonwoven fabric in front of the pressing piece (3-14), the pressing piece (3 -14) can be prevented from directly touching the skin, and bacterial infections can be prevented.

Since the injection needle member (3) is formed into an L-shape, the injection needle member (3) can be inserted vertically into the skin tissue and used vertically. Since 11) is hard to shake, skin damage can be prevented, and bleeding and pain hardly occur.

Further, this syringe needle unit is used by installing a syringe protection cap (3-18) as shown in FIG. 14, but the syringe protection cap (3-18) is the same as the syringe needle part (3-11). It has a diameter insertion port (small diameter part) (3-18-1) and an insertion port (large diameter part) (3-18-2) with an inner diameter larger than the diameter of the injection needle part (3-11). Therefore, the syringe protection cap (3-1
8) When inserting the needle (3-18) into the inner wall of the insertion port (3-18-1)
-11) is inserted, which damages the injection needle part (3-11) and makes it difficult to remove the syringe protection cap (3-18) from the injection needle part (3-11). In addition, the conduit (1) and the injection needle (3-1
1) When removing the initial air in the
The injection solution penetrates into the bacterial infection prevention member (3-14-1) due to the capillary phenomenon that occurs between the inner peripheral surface of (-18) and the outer peripheral surface of the injection needle (3-11), causing discomfort to the patient. Or give. In addition, since the vertical portion (3-11) and the bent portion (3-13) of the injection needle member (3) are connected at the sharp bent portion (3-11-1), the needle member (3) moves during use. In the case of intense exercise (exercise or hard work, or when the user sets the vertical end position to the dotted line as shown in FIG. 15 before use as necessary), the bending portion (3-11-1) is overloaded. Or a severe load may cause a problem in product reliability.

[0021]

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above problems, and when the syringe is refilled with the injection solution after use, the screw shaft is separated from the housing and the position is easily adjusted. It is an object of the present invention to provide a portable automatic injector that allows the screw rotating shaft and the push plate to be connected to the housing from a correct position after setting while visually observing.

It is a further object of the present invention to provide a portable automatic injector which is capable of injecting for a long time with improved sealing properties by using a reset button made of a semi-permeable material that is impermeable to air and water.

For this purpose, the present invention provides a portable automatic injector capable of injecting for a long time by providing a rotating force, separating a screw rotating shaft for performing a push function of a piston from a power providing means, and coupling the screw rotating shaft. In this case, a new type of automatic injector is provided in which a push plate is screw-connected to a screw rotating shaft and a setting position in advance and then comes into contact with a piston.

Further, the present invention prevents the injection needle from being damaged by configuring the injection needle of the injection needle unit of the automatic insulin injector to have a vertical injection needle, a horizontal connection rib, and a curved portion at the upper end of the injection needle. It is intended to be.

For this purpose, the injection needle unit of the present invention is provided with a curved portion at the upper end of the vertical injection needle, and the curved portion is provided with a downwardly inclined portion connected to a horizontal connecting rib.

It is a further object of the present invention to provide an injection needle unit in which detection means for detecting an abnormal blood sugar symptom is formed integrally with the injection needle of the injection needle unit so that the detection can be performed without any additional equipment. It is.

For this purpose, according to the present invention, a sensor unit for detecting abnormal blood sugar is added to the injection needle of the injection needle unit, and a lead wire connected to the sensor unit is integrally incorporated in the conduit.

Further, according to the present invention, a detecting means for detecting a symptom of abnormal blood glucose caused by an abnormal injection of an injection solution is formed integrally with the injection needle of the injection needle unit. It is another object of the present invention to provide an injection needle unit capable of automatically controlling the operation of a syringe.

For this purpose, a means for detecting the voltage of the sensor section and a control section for controlling the injection of the injection solution in accordance with the detection are provided in the main body of the automatic injector. The injection liquid can be automatically controlled in the main body.

[0030]

According to one aspect of the present invention, a portable automatic injector according to the present invention includes a housing; a syringe which holds an injection solution and is detachable from the housing; A syringe unit coupled thereto; a piston slidably fitted to the syringe so as to deliver the injection solution in the syringe to the syringe needle unit; a screw having a screw on the outer peripheral surface and rotationally driven by the rotational driving means A rotating shaft; a push means coupled to the screw rotating shaft so as to move in the axial direction when the screw rotating shaft rotates, and a push means for moving the piston together with the movement; a driving force transmitted to the screw rotating shaft; Power providing means provided in the housing; and a coupling hand which detachably connects the screw rotating shaft to the housing and couples to the power providing means. The piston, the screw rotating shaft, and the push means are detachable from the housing together with the syringe, and the coupling means is provided between the screw rotating shaft and the power providing means, and the power providing means is provided. A coupling member having a cruciform groove and a gear coupled with the output gear; a lower end portion of the screw rotating shaft inserted into the cruciform groove of the coupling member when the screw rotating shaft is located inside the housing; A coupling pin; and wherein the power supply means is at a fixed position of the housing and rotates the screw rotating shaft coupled by the coupling means without moving in the axial direction.

Further, the present invention, in an aspect of a needle unit, comprises a conduit, an L-shaped injection needle coupled to one end of the conduit, and a connector coupled to the other end of the conduit.
A pressing piece that comes into contact with the user's skin when the L-shaped injection needle projects vertically and pierces the injection needle into the user's skin;
The L-shaped injection needle comprises a horizontal connection rib connected to one end of the conduit, a vertical injection needle portion having an injection tip at a tip substantially perpendicular to the horizontal connection rib, A curved portion for connecting the horizontal connecting rib and the vertical injection needle portion, wherein the curved portion is connected to an upper end of the vertical injection needle portion and has a center at a point on a side of the vertical injection needle portion. And a substantially 1/4 arc portion forming an arc shape of 1/4.
Provided is an injection needle unit having a downwardly inclined portion that inclines downward toward the horizontal connection rib and connects the / 4 arc portion and the horizontal connection rib.

Further, according to the present invention, in an injection needle unit used in connection with an automatic injector, an injection needle member having a glucose sensor integrally formed around the injection needle and a lead wire connected to the glucose sensor are provided. An injection needle unit including a conduit is provided.

According to another aspect of the automatic injector of the present invention, a housing; a syringe for holding an injection solution and detachably attached to the housing; an injection needle unit connected to the housing so as to communicate with the syringe; The injection needle unit includes a conduit, an L-shaped injection needle coupled to one end of the conduit, a connector coupled to the other end of the conduit, and a user whose L-shaped injection needle projects vertically. A pusher that comes into contact with the skin of the user when the syringe needle is used to pierce the skin of the syringe; the syringe is slidably fitted to the syringe so as to deliver the injection solution in the syringe to the syringe needle unit; A piston detachably provided on the housing; a screw rotating shaft having a screw on an outer peripheral surface and rotationally driven by a drive motor; when the screw rotating shaft rotates on the screw rotating shaft, the axial direction thereof It is coupled to move the push means to move together with the piston by the movement;
A power supply means provided in the housing for transmitting a driving force to the screw rotating shaft; a glucose sensor pierced into the skin together with the injection needle provided in the injection needle; a glucose sensor comprising an injection needle; A core-shaped electrode portion formed through an insulating layer in the portion, an enzyme body provided in an insulated state with the electrode portion on the tip end side of the injection needle portion, and a conducting wire connected to the enzyme body and the electrode portion, respectively. A voltage detecting means connected to the conducting wire of the glucose sensor and detecting a change in the resistance value of the glucose sensor; a microcomputer for comparing the detected value of the voltage detecting means with a set level and generating a control signal A control unit for controlling the drive motor of the screw rotating shaft based on the control signal from the control unit; and controlling the drive motor via the microcomputer. Comprising; and over, a motor drive unit having a gear mechanism for selecting the output level of the drive motor based on the relay control.

[0034]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the drawings.

[0035]

Embodiment 1 First automatic injector for long-term injection FIG. 16 is a view showing an example of an automatic injector according to the present invention. A housing (120) is detachable from the housing (120). ), The housing (120) slidably inserted into the syringe (21).
The piston (121) is detachable from the housing (12) so that the piston (121) is moved vertically (up and down).
0), a power transmitting means housed in a housing (120) to generate a driving force.
(130), and a screw rotating shaft (131) housed in a housing (120) for driving the piston push means (150) by the driving force transmitted from the power supply means (130). The automatic injector also has a needle unit (only conduit (1) and connector (2) are shown in FIG. 16). The injection needle unit is connected to the housing (120) via a cover (110) that is coupled to the upper end of the housing (120) in a sealing state. The housing (120) includes a control button unit (123) connected to a control board (not shown) for controlling the power supply means (130), and a display (124) such as an LCD for displaying a control state. A battery cover (125) for holding a battery for providing power and a reset button (121) for performing a reset function are provided.
(140) is a bottom cover.

FIG. 17 is a plan view of FIG.
20) has a battery lid (125) on its top and a reset button
(121), a cover (110) and a connector (2) connected to the cover (110), and the connector (2) is connected to the conduit (1).

FIG. 18 is a plan view showing a state in which the cover (110) of FIG. 17 is omitted, and shows a structure in which the piston (122) and the push means (150) of the present invention are placed and a power transmission means. . FIG. 19 is a sectional view taken along the line BB of FIG. 18, and a coupling member (locking rotation port) (132) connected to the power supply means (130) is provided at the center of the lower part of the syringe storage space (126) of the housing (120). A push means guide groove (25) for guiding the upward movement of the push means (150), and a piston guide groove (27) for guiding the linear up and down movement of the piston (122).

FIG. 20 shows the coupling structure of the coupling member (132) formed in the syringe storage space (126) of the housing (120) of the present invention and the screw rotary shaft (131) through which power is supplied. It is a principal part expansion perspective view shown. Coupling member (132)
Has a gear (132-3) of a reduction function coupled to the output stage of the power supply means (130), and a cross-shaped groove (132-1) integrally formed with the gear (132-3), The connecting pin (13) of the screw rotating shaft (131) separated from the connecting member (132) is inserted into the cross-shaped groove (132-1).
3) disengages. Screw rotating shaft (131) is push means (150)
The push plate (154) linearly moves, and is screw-coupled to the screw rotating shaft (131) to guide the push plate (154) along the push means guide groove (25) so that the push plate (154) can move up and down. 122-2) and the push plate coupling groove (122-3) of the piston flange (122-1) integrated with the piston (122)
Push plate coupling projection (151-1) coupled to the piston edge projection (122-
A piston (122) having 2) and a syringe (21) for containing an injection solution and supplying it to the conduit (1) shown in FIG. 16 through the piston (122) are provided.

The gear (132-3) and the cross-shaped groove (132-1) which are driven at a reduced speed constitute a coupling member, and the coupling member and the coupling pin (133) constitute coupling means. The power supply means (130) and the screw rotating shaft (131) are separably connected.

FIG. 21 shows the separated screw rotation shaft (1) of the present invention.
31), a push means (150) coupled thereto, and a piston
(122) and an exploded perspective view showing the syringe (21) in an exploded manner, and FIG. 22 is a cross-sectional view showing a state in which these are combined. The screw rotating shaft (131) is formed of a threaded rod having the entire length as a male screw, and the lower end of the screw rotating shaft (131) has the cross-shaped groove (132-1).
A coupling pin (133) is integrally formed with the cap-type head, which is screw-coupled to the screw rotation shaft (131) at the upper end.
(131-1) are combined. The push means (150) is screwed to the screw rotation shaft (131) so as to be able to move up and down. The push means (150) includes a push plate (154) that is screw-connected to the screw rotating shaft (131) in a nut form, and a push plate (15).
4), and a push plate guide projection (151) connected to the push means guide groove (25) shown in FIG. 10 and a push plate connection protrusion (122-3) connected to the push plate connection groove (122-3). 151-
1) and the insertion protrusion (155) that is inserted and connected to the piston (122).
And a ring-shaped snap ring groove (156) formed in the insertion projection (155). The piston (122) has a snap ring ring (122-) corresponding to the snap ring groove (156).
4) is formed. A piston flange (122-1) is formed at the lower end of the piston (122), and a piston edge protrusion (122-2) is protruded from the piston flange (122-1). The piston flange (122-1) is further provided with a push plate coupling groove (122-3) that is coupled to the push plate coupling protrusion (151-1).

FIG. 23 is a cross-sectional view showing the installation state of the reset button (121). The reset button (121) is slidably connected to a hole formed at the upper end of the housing (120) by a compression spring and urged by a compression spring with its protruding end regulated. At least one of the reset button (121) and the housing (120) is provided with a sealing packing (121-1).

The present automatic injector having the above configuration is used as follows. First, the head (131-1) above the screw rotation shaft (131) is separated by screwing, and as shown in FIG.
(0) is screwed to the screw rotation shaft (131), and then the screw rotation shaft (13
Screw the head (131-1) to the upper end of 1). A coupling pin (133) is inserted into the lower end of the screw rotation shaft (131). Next, the coupling projection (151-1) of the push plate (154) is connected to the piston (122).
And the insertion protrusion (155) of the screw rotating shaft (131) and the push means (150) are inserted into the piston (122). Next, the piston (122) connected to the screw rotation shaft (131) is fully inserted into the syringe (21) as shown by a two-dot chain line in FIG. 22, and the tip of the syringe (21) is disposable. A syringe needle is attached. In this state, after inserting the injection needle into the injection bottle, the piston (122) is
The syringe (21) is filled with the injection solution of the vial by pulling it together with (131) to the solid line position in FIG. Syringe filled with chemical
When the (21) is inserted into the syringe storage space (126) of the housing (122), the connecting pin (133) of the screw rotating shaft (131) is connected to the connecting member (13).
The piston (12) should be connected to the cross-shaped groove (132-1) of (2) accurately according to the amount of the chemical contained in the syringe (21).
It is necessary to appropriately adjust the length of the screw rotation shaft (131) projecting from 2). In order to easily adjust the initial projection length of the screw rotation shaft (131), a mark (not shown) indicating a reference position of the scale or the screw rotation shaft can be attached to the housing (120). Alternatively, a separate length checking jig can be used. In this state, the syringe (21) to which the piston (122) is connected is inserted into the syringe storage space (126) of the housing (122), and as shown by an arrow in FIG. 133) to the cross-shaped groove of the connecting member (132)
(132-1). Thereafter, the cover (110) is screwed to the upper end of the housing (120), and the injection needle unit is connected to the tip (21-1) of the syringe (21). The push plate coupling groove (122-3) is formed in a large number in the form of a gear having a small pitch, and the coupling projections (151-1) coupled to the gear are formed intermittently to facilitate assembly. If the push plate guide projection (151) is eliminated to take such a shape, the reference position is lost, so that the assembly is easy. Of course, if the guide projection (122-2) is provided, there is an advantage of operating in the normal position.

When a motor (not shown) is driven, the torque transmitted through the power supply means (130) is transmitted to the gear (132-3),
The coupling member (132) integral with the gear (132-3) rotates. The rotation of the coupling member (132) is reduced by the engagement between the coupling pin (133) and the cross-shaped groove (132-1) and the power supply means (130).
(131). When the screw rotating shaft (131) rotates, the guide (151) of the push plate (154) is engaged with the push means guide groove (25) of the housing (21). Go to For example, screw shaft (13
When 1) rotates counterclockwise in FIG. 22, the push plate (154) supported by the push means guide groove (25) rises. Then, the piston (122) combined with the push plate (154)
Injects the injection solution held in the syringe (21) from the injection needle unit through the connector (2). When the injection solution is provided for a long time in this way, the piston (122) eventually rises to the initial two-dot chain line position. In this state, the user separates the injection needle unit from the body and stops using the syringe. That is, after use, the injection needle connected to the conduit is separated from the body, the connector (2) is separated from the cover (110), and the screwed cover (110) is removed from the housing (120). Then, in the reverse order of the process of FIG.
The coupling pin (133) is separated from the cross-shaped groove (132-1), and the syringe (21), the piston (122), the push means (150) and the screw rotating shaft (131) are taken out of the syringe storage space (126). When this is used again, after the injection solution is injected by the above-mentioned piston action, the screw rotating shaft (131) is rotated by hand to
Into the piston (122) as indicated by the solid line.
That is, the protrusion length of the screw rotation shaft (131) from the piston (122) is adjusted. To facilitate this adjustment, a scale or mark is provided on the housing (120) as described above,
A separate reference position indicating jig can be used. By properly adjusting the protrusion length of the screw rotation shaft (131),
Connect the syringe (21) to the syringe storage space (12
At the time of insertion into (0), the coupling pin (133) of the screw rotating shaft (131) can be accurately engaged with the cross-shaped groove (132-1) of the coupling member (132). At the upper end of the screw rotation shaft (131), push plate
After the screw (154) and the screw shaft (131) are screwed together, the head (1
The push plate (154) is not separated from the screw rotating shaft (131) since the 31-1) is screwed in the form of a cap. Therefore, the durability of the product is improved. As described above, the automatic injector according to the present embodiment is configured such that the injection (delivery) of the medicinal solution in the syringe (21) is performed by the piston (122) generated as a result of the upward movement along the screw rotation axis (131) of the push means (150). Pushing means (150) when resupplying the injection solution because it is performed by ascending movement
Must be moved downward to return to its original position.
However, reversing the screw rotating shaft (131) by the rotational force of the motor and returning the push means (150) to the original position requires 5 to 10 minutes for returning the screw rotating shaft to the initial position at an extremely low speed. It is not a good idea because it takes time. In this embodiment, the screw rotating shaft (131) can be separated from the motor and can be manually rotated, so that the screw rotating shaft (131) can be easily returned to the initial position. Furthermore, by rotating the screw rotating shaft (131) only in a certain direction depending on the motor driving force, the control function can be simplified and the manufacturing cost can be reduced. In this embodiment, the cover (110), the battery lid (125), the reset button (1
(21) and the bottom cover (140) are configured so that they can be completely sealed (the configuration itself is a well-known technique that can be configured using packing, and thus is not shown). The interior of the housing (120) is evacuated as it is supplied to the
Is overloaded. This overload can be prevented, for example, by forming the reset button (121) with a known semi-permeable material (a material that is not air-permeable). The semi-permeable material prevents moisture from penetrating inside the housing (120) and allows the inflow of external air to allow the housing (12) to enter.
0) Prevent vacuum inside. For example, housing (12
0) If the whole is made of a known translucent material, the manufacturing cost will increase. However, by making only a small part (reset button (121)) of a semi-permeable material, it can be saved while maintaining the semi-permeable function. It can contribute to cost. In this case, it is preferable that at least one of the reset button (121) and the housing (120) be packed to maintain a sealing property.
It is desirable to install (121-1).

[0044]

Embodiment 2 First Injection Needle Unit FIG. 24 is a sectional view of an embodiment of an injection needle unit according to the present invention. This injection needle unit has an L-shaped injection needle member (230) connected to one end of the conduit (1), and a connector (2) connected to the other end of the conduit (1). This injection needle member (230) is a vertical injection needle part (3-11) having a tip.
And a horizontal connecting rib (3-1) connected to one end of the conduit (1).
2). The injection needle member (230)
A curved portion (231) connected to the upper end of the injection needle portion (3-11) is provided between (3-11) and the connecting rib (3-12). Bending part (231)
Includes a downwardly inclined portion (233) smoothly connected to the connecting rib (3-12). The curved part (231) is the injection needle part (3-1
Starting from the upper end of 1), the injection needle (3-11) forms a substantially 1/4 arc centered on the center (P) on the horizontal line beside the upper end.

The injection needle unit also includes an injection needle member (2
30) has a pressing piece (3-14) formed integrally therewith.
The injection needle part (3-11) protrudes vertically from 14). Press piece (3-
14) is pressed against the skin when the needle member (230) is pierced by the user. The push piece (3-14) has a protective cap (218) for protecting the injection needle part (3-11) of the injection needle member (230).
A protection cap pipe groove (214-2) for receiving the tip of the cap is formed, and a projection (214-3) for holding the protection cap (218) is formed in the protection cap pipe groove (214-2). . The protective cap (218) has a through hole (218-3) larger in diameter than the injection needle part (3-11). A bacteria infection preventing member (3-14-1) made of a nonwoven fabric that has been disinfected is fixed to the front side (skin side) of the pressing piece (3-14).

As shown in FIGS. 25 and 26, through holes (218)
The upper end of the protective cap (180) in which the injection needle (3-11) is inserted into (-3) is firmly fitted into the protective cap groove (214-2) of the pressing piece (3-14). The inner diameter of the through hole (218-3) is
Since the diameter is larger than 11), the injection needle part (3-11) can be easily fitted into the protective cap (218), and the protective cap (218) has the protective cap tube groove (214-) of the pressing piece (3-14). Projection formed on 2)
(214-3) firmly fixed. According to the above embodiment, since the inner diameter of the through hole (218-3) is larger than the outer diameter of the injection needle (3-11), the air in the conduit (1) and the injection needle (3-11) is discharged. When the injection solution (insulin) in the syringe is discharged through the injection needle part (3-11) in order to perform the capillary action between the inner circumference of the protective cap (218) and the outer circumference of the injection needle part (3-11). Does not occur. Therefore, the phenomenon that the discharged chemical solution permeates the bacterial infection preventing member (3-14-1) does not occur. The user of this injection needle unit should put a protective cap (21
8), hold the pressing piece (3-14) in the other hand, and
8) Pull to separate from the needle part (3-11)
4) Press to pierce the injection needle (3-11) into the skin (abdomen). According to this injection needle unit, even if the user moves the abdomen violently or extends the bent injection needle (110) before use, the injection needle part (3-11) moves, but the curved part
Since (231) gives a buffering action to the injection needle (3-11), damage to the upper end of the injection needle (3-11) can be prevented. That is, since the curved portion (231) of the injection needle member (230) is smoothly connected to the horizontal connecting rib (3-12) by the downwardly inclined portion (233), the curved portion (231) is Even if the connecting rib (3-12) is higher than the connecting rib (3-12), the connecting
1) can be connected without difficulty. Therefore, the injection needle (3
Even if an impact is applied to -11), there is no possibility that the injection needle member (230) is cut.

[0047]

Embodiment 3 Second Injection Needle Unit and Second Automatic Injector FIG. 27 is a partial sectional view of another embodiment of the injection needle unit according to the present invention, FIG. 28 is a block diagram of an automatic injector circuit according to the present invention, FIG. 29 is an exemplary view of one example of the motor driving section (350) of the present invention, and FIG. 30 is an enlarged sectional view of FIG. As shown in FIG. 27, the injection needle unit of the present invention comprises a conduit (30
1) and an L-shaped injection needle member (330) connected to one end of the conduit (301). Although not shown, conduit (301)
A connector for connecting the present injection needle unit to the syringe of the automatic injector is connected to the other end of the automatic injection device. The injection needle member (330) is composed of an injection needle part (3-11) having a tip and a conduit.
L having a connection rib (3-12) connected to one end of (301)
It is shaped like a letter. This injection needle member (330) is
(3-11) and the connecting rib (3-12), the curved portion (23
It has a curved portion (330) similar in shape to 1). This curved part (330)
Is a downward slope that is smoothly connected to the connection rib (3-12)
(333). The injection needle member (330) has an injection needle part (3
-11) is integrally provided with a pressing piece (3-14) projecting vertically. The above configuration is the same as that described with reference to FIG.
The injection needle unit of FIG. 27 further includes a glucose sensor (307) coupled to the injection needle section (3-11). The glucose sensor (307) enters the body together with the injection needle (3-11) piercing the skin of the user. FIG.
As is clear from FIG. 30, which is an enlarged view of FIG. 30, the glucose sensor (307) includes an electrode wire (electrode portion) (303) wound in a core shape around the injection needle portion (3-11), and an injection needle portion (303). An insulating layer (304) wound around the injection needle portion (3-11) for insulating the electrode needle (3-11) from the electrode wire (303), and integrally with the distal tip side of the outer periphery of the injection needle portion (3-11). It comprises an electrode wire (303) and an enzyme member (Enzyme member) (302) provided in an insulated state. Enzyme (30
2) and the electrode wire (303) enter the human body together with the injection needle (3-11). The enzyme body (302) is preferably placed near the tip of the injection needle (3-11) (the tip of the injection needle where the injection solution is provided into the body).

Conductors (305, 306) are connected to the enzyme body (302) and the electrode wires (303), respectively, and the conductors (305, 306) are connected to voltage detecting means of an automatic injector to which the present injection needle unit is connected. . The conductors (305, 306) may be embedded in the pressing piece (3-14) or may be exposed without being embedded.

The automatic injector shown in FIG. 28 using the injection needle unit shown in FIG. 27 has the same device as the insulin supply device shown in FIG. A control device for controlling the amount of insulin is provided. This control device is housed in a housing (120) of the automatic injector, and a voltage detecting means (310) for detecting a voltage value of the glucose sensor (307).
And a control unit (370) for comparing the detection value of the voltage detection means (310) with the set level to control the insulin supply motor drive unit (350). In the illustrated example, the voltage detecting means (310) includes an amplifier (311) for amplifying the level detected by the glucose sensor (307) and a transistor (312) biased by an output level passing through the amplifier (311) to perform a switching function. ) And an analog / digital converter (313) for converting the output of the transistor (312) to a digital value
And The control unit (370) receives a value obtained by converting the detection value of the voltage detection unit (310) through the analog / digital converter (313), compares and determines the microcomputer, and performs overall control of the control unit (370). 320). The control section (370) also has a motor drive section (350), and the motor drive section (350)
Under the control of the microcomputer (320), the rotation speed of the injection solution supply motor (352; FIG. 29) for supplying the drug solution is controlled.
This motor drive unit (350) is a relay (3) having a movable contact that changes the contact position according to the control signal of the microcomputer (320).
51) and the drive motor (352) according to the position of this movable contact
Gear mechanism (353) for changing the rotation speed of the motor. The drive motor (352) is located around the gear mechanism (353).
An auxiliary sensor (354) that detects the rotation speed of
The auxiliary sensor (354) sends a signal corresponding to the detected rotation speed of the drive motor (352) to the microcomputer (320), and the microcomputer (320) controls the motor drive unit (350).

As described above, the enzyme body (302) is
The injection needle (3-11) is provided near the tip of the injection needle (3-11) so that when the (3-11) is stabbed into the body, it enters the body together. The enzyme body (302) detects the blood glucose level of the cortex of the user and generates an electric charge according to the blood glucose level. The electrode wire (303) wound in a core shape while being insulated around the injection needle part (3-11) via the insulating layer (304) is separated from the enzyme body (302) by a predetermined distance. As the enzyme body (302), for example, glucose oxidase used for measuring blood glucose can be used.

The basic operation of the automatic injector shown in FIG. 28 is shown in FIG.
6, but different from that of FIG.
The point is that excessive insulin is detected and the entry of insulin is automatically controlled. That is, when an excessive amount of the insulin injection solution enters, the enzyme (glucose oxidase) (302) of the glucose sensor (307) integrated with the injection needle (3-11) promotes the blood glucose reaction, Then, a charge is generated around the enzyme body (302). Then, a current flows due to charges between the enzyme body (302) connected to the injection needle part (3-11) and the insulated electrode wire (303). In other words, if the blood sugar rises, the enzyme body (302) and the electrode wire (30) are insulated by the reaction of the enzyme body (302).
Since the resistance value of (3) decreases and the current flow increases, the voltage detection means (310) recognizes this through the conductors (105, 106), and a digital value corresponding to this recognizes the microcomputer (320) of the control unit (370). ) To provide. Of course, the microcomputer (320) has a built-in program for recognizing whether or not the voltage is abnormal. Therefore, as the result value passed through the microcomputer (320), the motor drive unit
When the microcomputer (350) is driven and the microcomputer (320) is operated as shown in FIG. 29, the relay (351) is operated by this, and the polarity and level of the voltage provided to the gear mechanism (353) are changed. As a result, the rotational force of the motor (352) changes. That is, if the sugar is recognized as high, the motor (352)
The gear mechanism (353) is driven so as to reduce the torque of the motor, and if it is recognized that the torque is low, the gear mechanism (353) is driven so as to increase the torque of the motor (352). Since such a technique is a normal technique, detailed description thereof is omitted.

As the gear mechanism (353), one capable of selecting the output of the motor (352) to a desired level is used.
Such a gear mechanism can be realized by using a solenoid that is supplied with power from the relay (351).

The present invention described above is not limited to the above-described embodiment and drawings, and various substitutions, modifications, and changes can be made within the scope of the technical idea of the present invention in the technical field to which the present invention belongs. Will be apparent to those skilled in the art.

[0054]

As described above, according to the present invention, the screw rotating shaft for transmitting the power for the piston push function of the portable automatic injector can be separated from the power supply means. By supplying the injection solution of the syringe by letting it, the injection solution supply is immediately separated and the length of the screw rotating shaft is manually changed to the standard setting position, and in this state, the injection solution is transferred to the syringe, Power can be provided by returning the syringe to the original position and coupling the coupling means, which eliminates the need for a separate automatic control means by initial coupling, thereby contributing to a reduction in manufacturing costs and saving time for resupplying the injection solution. It is.

Further, the present invention provides various opening / closing means (cover,
(Sealing plug and button) together with the sealing packing to maintain the water tightness, but can be locally installed so as to prevent the inside from maintaining a relatively vacuum as the injection liquid is supplied. Specific part (reset button)
Made of semi-permeable material, air is supplied from outside,
By performing the function of shutting off moisture, the waterproof function is maintained, thereby preventing the internal vacuum state and also preventing the overload due to the supply of the injection solution.

Further, according to the present invention, a curved portion extending from the upper end portion of the injection needle portion is provided to improve the impact resistance, so that damage to the injection needle portion can be prevented. The protective cap tube can be easily fixed by fitting the protective cap tube into the tube and fixing it. The inner diameter of the protective cap tube is larger than that of the injection needle portion, so that the injection liquid flows at the initial stage. At this time, it is possible to prevent the injection solution from leaking into the pressing piece due to the capillary phenomenon.

Further, the injection needle unit of the present invention and the automatic injector using the same, when the injection solution is supplied in an excessive or insufficient state, senses a change in the physical blood sugar caused by the injection liquid with the injection needle unit, and detects the result. If provided to an automatic injector, the injector will recognize this and automatically supply the injection (insulin) accordingly, maximizing the safety of the product.

Accordingly, a medical accident caused by careless operation by the user can be prevented in advance. In addition, since a sensor for detecting a change in blood sugar due to excessive injection of the injection solution is provided together with the injection needle, there is no need to separately install a sensor when using the device, which makes the use more convenient.

[Brief description of the drawings]

FIG. 1 is a control configuration diagram of a portable automatic injector.

FIG. 2 is a perspective view showing an installation example of the port sensor of FIG. 1;

FIG. 3 is a cross-sectional view of a conventional syringe in which the configuration of FIG. 1 is combined and used.

FIG. 4 is a front view showing another example of the portable automatic injector.

FIG. 5 is a plan view of FIG. 4;

FIG. 6 is an exploded sectional view taken along line AA of FIG. 2;

FIG. 7 is a front view showing an example of a power control unit.

FIG. 8 is an exploded view of a use state showing an example of a push means.

FIG. 9 is a perspective view showing an example of an injection needle unit.

FIG. 10 is a perspective view showing another example of the injection needle unit.

FIG. 11 is a partial sectional view showing an example of the injection needle unit of FIG. 10;

FIG. 12 is a sectional view showing a usage state of the injection needle unit of FIG. 10;

FIG. 13 is a perspective view showing a usage state of the injection needle unit of FIG. 10;

FIG. 14 is an enlarged sectional view of a main part of the injection needle unit of FIG. 10;

FIG. 15 is an explanatory diagram showing a problem in use of FIG. 14;

FIG. 16 is a schematic configuration diagram of the present invention.

FIG. 17 is a schematic plan view showing a connection state of the present invention.

FIG. 18 is a plan view showing the present invention in a horizontal cross-sectional state with a part cut away.

19 is a sectional view showing a sectional state taken along line BB of FIG. 18;

FIG. 20 is an exploded perspective view of an essential part of the present invention, in which the main part is partially cut away.

FIG. 21 is an exploded perspective view of a main part of the present invention.

FIG. 22 is a cross-sectional view illustrating the connection state of FIG. 21.

FIG. 23 is an enlarged sectional view showing the configuration of a reset button according to the present invention.

FIG. 24 is an enlarged sectional view of a main part showing the injection needle unit of the present invention.

FIG. 25 is an enlarged exploded sectional view of a main part of FIG. 24;

FIG. 26 is a sectional view showing another example of FIG. 25;

FIG. 27 is an enlarged view of a main part of an injection needle unit showing another example of the present invention.

FIG. 28 is a control configuration diagram of the syringe of the present invention.

FIG. 29 is a control configuration diagram of the motor drive unit of FIG. 28;

FIG. 30 is an enlarged sectional view of a main part of an injection needle unit showing another example of the present invention.

[Explanation of symbols]

 1 Conduit 2 Connector 2-15 Male thread 2-16 Female thread 2-17 Protective cap 3 Injection needle 3-11 Injection needle 3-11-1 Bend 3-12 Connecting rib 3-13 Bend 3-14 Push Piece 3-14-1 Bacterial infection prevention member 3-14 Protective cap tube groove 3-14-3 Projection 3-18 Protective cap 3-18-1 Insertion opening 3-18-2 Insertion opening 10 Cover 11 Screw groove 12 Bolt screw Part 13 Packing 20 Housing 20-5 Connector part 21 Syringe 22 Piston 23 Syringe storage space 24 Battery lid 25 Push means guide groove 26 Piston guide protrusion 27 Piston guide groove 30 Power supply means 31 Screw rotating shaft 32 Motor 33 Reduction mechanism 40 Bottom cover 50 Push means 51 Push means guide protrusion 52 Irregularity means 54 Lower disk 55 Upper disk 110 Cover 120 Housing 121 Reset button 122 Piston 122-1 Piston flange 122-2 Piston edge protrusion 122-3 Push plate coupling groove 123 Control button 124 this Play 125 Battery lid 126 Syringe storage space 130 Power supply means 131 Screw rotating shaft 131-1 Head 132 Connecting means 132-1 Cross-shaped groove 133 Connecting pin 140 Bottom cover 150 Push means 151 Push plate guide protrusion 151-1 Push plate connection protrusion 154 Push plate 155 Insertion protrusion 156 Snap ring groove 214-2 Protective cap groove 214-3 Protrusion 218 Protective cap 218-3 Through hole 230 Injection needle part 231 Bend part 233 Inclined part 301 Conduit 302 Enzyme body 303 Electrode part 304 Insulation layer 305 306 Conductor 307 Glucose sensor 310 Voltage detecting means 311 Amplifier 320 Microcomputer 330 Injection needle member 350 Motor drive unit 351 Relay 352 Motor 353 Gear mechanism 360 Alarm unit 370 Control unit

Continuation of the front page (56) References JP-A-7-194701 (JP, A) JP-A-2-63472 (JP, A) JP-A 8-224304 (JP, A) JP-A-3-275073 (JP) JP-A-5-49696 (JP, A) JP-A-2-144077 (JP, A) JP-A-4-95045 (JP, U) JP-A-4-65551 (JP, U) 9-507400 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) A61M 5/20 A61M 5/158 A61M 5/315 A61M 5/32

Claims (6)

(57) [Claims] A syringe that holds an injection solution and is detachable from the housing; an injection needle unit that is connected to the housing so as to be in communication with the syringe; and sends an injection solution in the syringe to the injection needle unit. screw rotation shaft that is driven to rotate a threaded on the outer peripheral surface; a piston which fit was slidably to the syringe so that when the screw rotating shaft to the screw rotating shaft is rotated so as to move in the axial direction And push means for moving the piston together with the movement thereof; power providing means provided in the housing for transmitting a driving force to the screw rotation shaft; and making the screw rotation shaft detachable from the housing. Coupling means coupled to the power supply means by means of the piston, the screw rotating shaft and the push means.
The coupling means is detachable from the housing together with the syringe, and the coupling means is provided between the screw rotating shaft and the power supply means.
A gear provided and coupled to the output gear of the power supply means
And a coupling member having a cross-shaped groove;
When it is located inside the
A connecting pin provided at the lower end of the screw rotating shaft.
Wherein the power providing means is in a fixed position on the housing,
The screw rotating shaft connected by the connecting means is moved in the axial direction.
A portable automatic injector characterized by rotating without moving . 2. One end is closed at the bottom and the other end is openable and closable.
A housing having a syringe storage space; One end of this syringe storage space can be inserted and removed sequentially from the bottom side
A screw rotation shaft with a male screw on the outer peripheral surface, this screw rotation
Push means that moves in the axial direction when the shaft rotates,
A piston pressed and moved by the push means, and
This piston is slidably fitted with a syringe holding syringe solution.
Nji; Conducts to the syringe stored in the syringe storage space
A syringe needle unit, and the other end of the syringe storage space
Cover that opens and closes; and Syringe storage in the above housing
Is located at the bottom of one end and is stored in the syringe storage space.
Power providing means for transmitting torque to the screw rotation shaft; A portable automatic injector comprising: 3. A conduit, an L-shaped needle coupled to one end of the conduit, a connector coupled to the other end of the conduit, and the L-shaped needle protrudes vertically to allow the user to A needle which has a pusher which comes into contact with the skin of the user when the needle is used to pierce the skin with the needle, wherein the L-shaped needle comprises a horizontal connecting rib connected to one end of the conduit; A vertical injection needle portion having an injection tip at a tip substantially perpendicular to the horizontal connection rib, and a curved portion connecting the horizontal connection rib and the vertical injection needle portion, wherein the curved portion has an upper end of the vertical injection needle portion. , Which is connected to the vertical injection needle portion and has a substantially 1/4 arc shape centered on a point on the side of the vertical injection needle portion.
An injection needle unit comprising: a quarter-arc portion; and a downwardly inclined portion that connects the substantially quarter-arc portion and the horizontal connection rib and that is inclined downward toward the horizontal connection rib. Further, the push piece has a protective cap tube groove for fitting an end of a protective cap tube fitted to the vertical injection needle portion, and an inner diameter of the protective cap tube is:
The injection needle unit according to claim 3, wherein the outer diameter of the injection needle unit is larger than an outer diameter of the injection needle unit so as to form a space between the injection needle unit and the injection needle unit. 5. A conduit, an L-shaped needle coupled to one end of the conduit, a connector coupled to the other end of the conduit, and the L-shaped needle protrudes vertically to provide a user's A pusher that comes into contact with the skin of the user when the injection needle is used to pierce the skin. The injection needle unit is provided with a glucose sensor that pierces the skin together with the injection needle unit. The glucose sensor has a core-shaped electrode portion formed on the injection needle portion via an insulating layer, an enzyme body provided in an insulated state with the electrode portion on the tip side of the injection needle portion, and the enzyme body and the electrode portion. And a conducting wire connecting each to the voltage detecting means. 6. A housing for holding a syringe and being detachable from the housing; a syringe unit connected to the housing so as to communicate with the syringe; a syringe unit comprising: a conduit; An L-shaped injection needle connected to one end, a connector connected to the other end of the conduit, and the L-shaped injection needle protruding vertically for use in inserting the injection needle into a user's skin A piston which is slidably fitted to the syringe so as to deliver the injection solution in the syringe to the injection needle unit and is detachably provided in the housing; A screw rotating shaft having a screw on a surface and rotationally driven by a drive motor; coupled to the screw rotating shaft so as to move in the axial direction when the screw rotating shaft rotates, A push means for moving the piston together; a power providing means provided in the housing for transmitting a driving force to the screw rotating shaft; a glucose stabbed into the skin together with the injection needle provided in the injection needle; Sensor: The glucose sensor comprises a core-shaped electrode portion formed on the injection needle portion via an insulating layer, an enzyme body provided on the tip end side of the injection needle portion in an insulated state with the electrode portion, And a lead wire respectively connected to the electrode part; a voltage detection means connected to the lead wire of the glucose sensor for detecting a change in the resistance value of the glucose sensor; comparing the detection value of the voltage detection means with a set level A control unit including a microcomputer for generating a control signal; and controlling the drive motor of the screw rotating shaft based on the control signal from the control unit. A portable automatic injector, comprising: a motor drive unit having a relay for controlling the drive motor via the microcomputer and a gear mechanism for selecting an output level of the drive motor based on the relay control.