WO2022030301A1

WO2022030301A1 - Drive unit for liquid ejection, and liquid ejection device

Info

Publication number: WO2022030301A1
Application number: PCT/JP2021/027729
Authority: WO
Inventors: 博山田; 恭平 ▲高▼橋; 靖岡田; 裕二小川
Original assignee: 参天製薬株式会社; 株式会社アイカムス・ラボ
Priority date: 2020-08-04
Filing date: 2021-07-27
Publication date: 2022-02-10
Also published as: JPWO2022030301A1

Abstract

A drive unit 100 for liquid ejection allows a user to eject a fixed amount of liquid easily and economically without complicating manufacturing tasks and liquid replenishment tasks, and is for actuating a pump bottle 10 having a discharge port 13, a storage part 11, and a support base 12, the pump bottle being configured such that when the storage part 11 moves, relative to the support base 12, from a normal state position to an operation position, liquid stored in the storage part 11 is ejected through the discharge port 13. This drive unit for liquid ejection comprises: a unit body 20 that allows installation of the pump bottle 10 with the discharge port 13 exposed to the outside; a pusher 35 which is provided to the unit body 20 such that the pusher can face the pump bottle 10 installed to the unit body 20 and can move along the movement direction of the storage part 11; and a main drive member 31, a driven member 32, and a biasing spring 33 which are for moving, relative to the unit body 20, the pusher 35 between the normal state position and the operation position, such movement driven by an electric motor 40.

Description

Liquid injection drive unit and liquid injection device

The present invention relates to a liquid injection drive unit and a liquid injection device, and more particularly to a liquid injection drive unit and a liquid injection device suitable for injecting medicated liquids such as eye drops, nasal drops, and throat medicines. be.

As this type of liquid injection device, a device using a piezoelectric micropump is provided. That is, when the operation switch provided on the main body of the apparatus is operated, the piezoelectric micropump is operated so that the liquid stored in the container inside the main body of the apparatus is ejected to the outside. According to this liquid injection device, since the injection amount of the liquid does not depend on the operation force of the operator, it is possible to inject a necessary and sufficient amount of liquid even when operated by a user having a small operation force, for example. It is possible (see, for example, Patent Document 1).

Japanese Patent No. 6281966

By the way, in the above-mentioned liquid injection device, it is necessary to connect the piezoelectric micropump and the container inside the main body of the device, and there is a concern that the manufacturing work and the liquid replenishment work will be complicated. In particular, when a medicated liquid such as eye drops or nasal drops is to be sprayed, the piezoelectric micropump and the container must be connected in a sterilized state, which further complicates manufacturing work and liquid replenishment work. There is a risk of

In view of the above circumstances, the present invention provides a liquid injection drive unit capable of injecting a certain amount of liquid more easily and economically by the user without complicating the manufacturing work and the liquid replenishment work. It is an object of the present invention to provide a liquid injection device.

In order to achieve the above object, the liquid injection drive unit according to the present invention has a discharge port, a storage unit, and a support base, and when the storage unit moves from a normal position to an operation position with respect to the support base. A liquid injection drive unit for operating a pump bottle that discharges the liquid stored in the storage unit from the discharge port, and the pump bottle can be arranged with the discharge port exposed to the outside. The unit body, the pusher disposed on the unit body in a state where it can face the pump bottle arranged on the unit body and can move along the moving direction of the storage unit, and the actuator. It is characterized by comprising a drive mechanism unit for moving the pusher between the normal position and the operation position with respect to the unit main body by driving.

Further, according to the present invention, in the above-mentioned liquid injection drive unit, in the injection operation in which the storage unit moves from the normal position to the operation position, the storage unit moves from the operation position. The pusher is configured to move faster than the return operation of moving toward the normal position.

Further, the present invention is characterized in that, in the above-mentioned liquid injection drive unit, the drive mechanism unit is in a start standby state of the actuator with the storage unit arranged in the normal position.

Further, according to the present invention, in the above-mentioned liquid injection drive unit, the drive mechanism unit includes an urging member and a cam mechanism interposed between the unit body and the pusher, and the urging member is the unit body. The pusher is urged so that the storage portion of the pump bottle arranged in the above moves from the normal position toward the operation position, and the cam mechanism includes a driving member rotated by the actuator and a driving member. It has a driven member that slides along the urging direction of the urging member with the rotation of the driving member, and between the driving member and the driven member, the driven member with respect to the rotation amount of the driving member. It is characterized in that a progressive cam portion having a small ratio of the slide amount of the driven member and a rapid cam portion having a large ratio of the slide amount of the driven member to the rotation amount of the driving member are provided.

Further, the present invention is characterized in that, in the above-mentioned liquid injection drive unit, the urging member is a coil-shaped spring provided so as to surround the periphery of the pump bottle arranged in the unit body. And.

Further, according to the present invention, in the above-mentioned liquid injection drive unit, the driving member and the driven member each have a cylindrical shape, and the gradual cam portion and the rapid cam portion alternate along the peripheral surface of the cylinder. The driving member is provided so as to circulate so as to be

Further, according to the present invention, in the above-mentioned liquid injection drive unit, the pusher is provided between a position facing the pump bottle arranged in the unit body and a retracting position not facing the pump bottle. It is provided so as to be movable, and when the pusher is arranged at the retracted position, the pump bottle can be accommodated in the unit main body.

Further, according to the present invention, in the above-mentioned liquid injection drive unit, the unit body is provided with an injection opening for exposing the discharge port of the pump bottle to the outside, and the injection opening is provided on the outer surface of the unit body. It is characterized in that a protruding portion is provided in a portion surrounding the.

Further, in the above-mentioned liquid injection drive unit, the unit body is provided with a light projecting member around the injection opening and closer to the injection opening than the protrusion. It is characterized by that.

Further, the liquid injection device according to the present invention is characterized in that a pump bottle is arranged in the unit main body of the above-mentioned liquid injection drive unit.

Further, the present invention is characterized in that, in the above-mentioned liquid injection device, a liquid eye drop is stored in the storage portion of the pump bottle.

According to the present invention, since the application target is a pump bottle in which a liquid is discharged from a discharge port by pressing a storage portion independently of the drive unit for liquid injection, connection work is required for the liquid supply system. There is no need to sterilize the entire liquid injection device, and there is no risk of complicated manufacturing work. Further, when replenishing the liquid, it is only necessary to replace the entire pump bottle, so that the work can be facilitated. This makes it possible to provide, for example, a fixed-quantity discharge device for a medicinal liquid such as eye drops easily and economically.

FIG. 1 is a cross-sectional view of a liquid injection device according to an embodiment of the present invention in which a storage portion of a pump bottle is arranged at a normal position. FIG. 2 is a cross-sectional view of the liquid injection device shown in FIG. 1 in a state where the storage portion of the pump bottle is arranged at the operation position. FIG. 3 is an exploded perspective view of the liquid injection device shown in FIG. 1 in a state where the pusher is arranged at the retracted position and the pump bottle is arranged outside the unit main body. FIG. 4 is a diagram conceptually showing an example of use when instilling eye drops by applying the liquid injection device shown in FIG. 1. 5A and 5B show a pump bottle of the liquid injection device shown in FIG. 1, in which FIG. 5A is a perspective view of a state in which a storage unit is arranged in a normal position, and FIG. 5B is a perspective view in which the storage unit is arranged in an operation position. It is a perspective view of the state. 6A and 6B show a reference example of the operation of the pump bottle. FIG. 6A is a schematic cross-sectional view in a state where the reservoir is arranged in the normal position, and FIG. 6B is a sectional view in a state where the reservoir is arranged in the operation position. It is a schematic diagram. FIG. 7 is a partial perspective view showing a main part of the liquid injection device shown in FIG. FIG. 8 is a perspective view showing the internal structure of the liquid injection device shown in FIG. 9A and 9B show the operation of the drive mechanism unit applied to the liquid injection device shown in FIG. 1, in which FIG. 9A is a perspective view of a main part in a state where the driving member and the driven member are most separated from each other, and FIG. 9B is a perspective view. A perspective view of a main part in a state where the driving member is rotated from the state (a), and (c) is a state in which the driven member slides in a direction close to the driving member due to the urging force of the urging member (injection of the drive mechanism unit). (Operation) is a perspective view of the main part, (d) is a state (drive mechanism) in which the driven member slides in a direction away from the driving member against the urging force of the urging member due to the operation of the cam mechanism accompanying the rotation of the driving member. It is a perspective view of the main part of the part return operation).

Hereinafter, preferred embodiments of the liquid injection drive unit and the liquid injection device according to the present invention will be described in detail with reference to the accompanying drawings.

1 to 4 show a liquid injection device according to an embodiment of the present invention. The liquid injection device 1 exemplified here targets a liquid eye drop (liquid) as an injection target, and includes a pump bottle 10 and a liquid injection drive unit 100.

As shown in FIG. 5, the pump bottle 10 has a storage portion 11 in which eye drops are stored and a support base portion 12 arranged so as to be relatively movable with respect to the storage portion 11, and the support base portion 12 has a support base portion 12. On the other hand, when the storage unit 11 is pressed, the eye drops of the storage unit 11 are configured to be ejected from the discharge port 13. In the illustrated example, a resin pump bottle 10 having a substantially columnar outer shape and having a discharge port 13 at the tip of the support base 12 is applied. As the pump bottle 10 for injecting the eye drops from the discharge port 13 by the pressing operation of the storage portion 11, an existing one may be appropriately applied.

If a specific example of the pump bottle 10 is shown for reference, the one shown in FIG. 6 can be applied. In this pump bottle 10, a return spring 14 is provided between the storage portion 11 and the support base portion 12. As shown in FIG. 6A, the return spring 14 holds the storage portion 11 in the most extended normal position with respect to the support base portion 12 when no pressing operation force is applied to the support base portion 12. .. An injection spare chamber 15 is provided inside the storage unit 11. The injection reserve chamber 15 communicates with the inside of the storage unit 11 via the water suction port 15a, and the water suction port 15a is provided with a first check valve 15b. The first check valve 15b only allows the passage of fluid from the storage unit 11 to the injection reserve chamber 15. The support base 12 is provided with a discharge pipe line 16. The discharge pipe line 16 opens to the outside through the discharge port 13 described above and also opens to the inside of the injection spare chamber 15 through the suction port 16a, and has a second check valve 16b inside. .. The second check valve 16b only allows the passage of fluid from the injection reserve chamber 15 to the discharge port 13. The discharge pipe line 16 is provided with a piston 17 so as to be in sliding contact with the inner peripheral surface of the injection spare chamber 15.

In this pump bottle 10, as shown in FIG. 6B, when a pressing operation force is applied to the storage portion 11 against the spring force of the return spring 14, a portion having a water suction port 15a in the injection spare chamber 15 ( Hereinafter, the pressure of the compression chamber portion 15c) becomes high, and the first check valve 15b is in a closed state, while the second check valve 16b is in an open state. As a result, the fluid stored in the compression chamber portion 15c is discharged to the outside through the discharge port 13. On the other hand, when the pressing operation force applied to the storage unit 11 is removed, the storage unit 11 returns to the normal position by the return spring 14, and the pressure of the compression chamber unit 15c drops accordingly, so that the first check valve 15b Is in the open state, while the second check valve 16b is in the closed state. As a result, the eye drops in the reservoir 11 are sucked into the compression chamber 15c through the suction port 16a. After that, if the storage unit 11 is pressed and moved to a predetermined operation position, a certain amount of eye drops stored in the compression chamber unit 15c will be discharged to the outside through the discharge port 13. In the configuration example shown in FIG. 5, an inclined surface 12a is provided at the tip of the support base portion 12, and the discharge port 13 of the discharge pipe line 16 ejects the eye drops in a direction orthogonal to the inclined surface 12a. Along with the opening, a nozzle 18 is attached to the discharge port 13.

As shown in FIGS. 1 to 4, the liquid injection drive unit 100 to which the above-mentioned pump bottle 10 is applied includes a unit body 20 having a substantially cylindrical shape with a diameter larger than that of the pump bottle 10. The unit main body 20 has an outer diameter that allows it to be gripped with one hand, and has an accommodating hole 21. The accommodating hole 21 is a substantially columnar space for accommodating the pump bottle 10, and is opened at one end of the unit main body 20 while the other end is covered with the contact wall 22. In the present embodiment, the accommodating hole 21 is provided at a position deviated from the axis of the unit body 20 so as to be substantially parallel to the axis of the unit body 20. In the following, for convenience, the side where the accommodating hole 21 is provided with respect to the axis of the unit main body 20 is referred to as a front surface, and the opposite side thereof is referred to as a back surface to specify the direction.

The accommodation hole 21 has an inner diameter that allows the support base 12 of the pump bottle 10 to be accommodated without rattling and the storage portion 11 and the support base 12 to move relative to each other. The length of the accommodating hole 21 along the axial direction is when the tip end portion of the support base portion 12 is brought into contact with the contact wall 22 in a state where the storage portion 11 is arranged in the normal position with respect to the support base portion 12. , A part of the storage unit 11 is configured to be exposed to the outside. The dimension of the storage unit 11 protruding from the accommodating hole 21 is set to be larger than the operation stroke amount of the storage unit 11, that is, the moving distance from the normal position to the operation position.

As is clear from the figure, an inclined wall portion 22a is provided on the portion of the unit body 20 on the front side of the contact wall 22. The inclined wall portion 22a is inclined so as to gradually become one end side from the back surface side to the front side, and matches the inclined surface 12a of the support base portion 12 when the pump bottle 10 is accommodated in the accommodating hole 21. It is formed so that it can be used. The inclined wall portion 22a is provided with an injection opening 22b at a portion of the discharge port 13 corresponding to the nozzle 18. The injection opening 22b is an opening for exposing the discharge port 13 to the outside through the nozzle 18. Further, in the unit main body 20, a cover peripheral wall portion (projecting portion) 22c and an LED (light projecting member) 23 are provided in a portion around the inclined wall portion 22a. The cover peripheral wall portion 22c is an endless annular protrusion provided on the outer surface of the unit main body 20 around the injection opening 22b, and covers the periphery of the eyes when the injection opening 22b faces the pupil. It is formed to a size that can be used. The LED 23 irradiates the outside of the unit main body 20 with light, and is arranged in a portion between the cover peripheral wall portion 22c and the front side of the injection opening 22b.

A cylindrical main driving member 31 and a driven member 32 are provided on the outer peripheral portion of the peripheral wall 24 constituting the accommodating hole 21 in the unit main body 20, and are attached between the driven member 32 and the unit main body 20. A force spring (biasing member) 33 is provided.

The driving member 31 is arranged so as to be prevented from moving along the axial direction of the accommodating hole 21 on one end side of the unit main body 20 and to be rotatable around the axial center of the accommodating hole 21. As is clear from FIG. 7, teeth 31a meshing with the drive gear 41 are provided on the outer peripheral surface of the driving member 31. The drive gear 41 rotates via the reduction mechanism 42 when the electric motor (actuator) 40 arranged in the unit main body 20 is driven, and rotates the driving member 31 with respect to the unit main body 20. Reference numeral 43 in FIG. 1 is an operation switch for lighting the LED 23 and driving the electric motor 40, and is provided on the rear end side of the other end surface of the unit main body 20. In the present embodiment, when the operation switch 43 is pressed, the LED 23 is turned on for a predetermined time (for example, 1 second), and then the electric motor 40 is driven. A battery that serves as a power source for the LED 23 and the electric motor 40 is arranged in a portion of the unit main body 20 that is on the back side of the accommodating hole 21.

The driven member 32 is arranged on the other end side of the unit main body 20 with respect to the driving member 31, so that the rotation around the axis of the accommodating hole 21 is prevented and the driven member 32 moves along the axis of the accommodating hole 21. It is possible. The driven member 32 is provided with a connecting rod 34 on a portion on the back surface side of the accommodating hole 21. The connecting rod 34 is a columnar member extending from the outer peripheral portion of the driven member 32 to the other end side along the axial center of the accommodating hole 21, and is movably arranged in the guide hole 25 provided in the unit main body 20. It has been done. The connecting rod 34 is provided with a pusher 35 on an end surface exposed from the guide hole 25. The pusher 35 projects radially from the connecting rod 34, is movable along the axial center of the accommodating hole 21 together with the driven member 32 via the connecting rod 34, and rotates around the axial center of the connecting rod 34. Is possible. When the driven member 32 is arranged at the position farthest from the driving member 31, the pusher 35 is arranged at a position protruding from the storage portion 11 of the pump bottle 10 accommodated in the accommodating hole 21 and is arranged at the support base portion 12. On the other hand, even when the storage unit 11 is arranged in the normal position, it can be arranged at the position facing the end face of the storage unit 11. When the pusher 35 is rotated around the axis of the connecting rod 34 from this state, as shown in FIG. 3, the pusher 35 is arranged at a retracted position so as not to face the end face of the storage portion 11, and the accommodation hole of the unit main body 20 is accommodated. The pump bottle 10 can be attached to and detached from the 21.

As shown in FIGS. 8 and 9, the main driving member 31 and the driven member 32 are provided with cam surfaces 51 and 52 at portions facing each other. The cam surfaces 51 and 52 move the driven member 32 with respect to the driven member 31 along the axis of the accommodating hole 21 when the driven member 31 rotates. In the present embodiment, the driving member 31 is provided with the driving cam surface 51, and the driven member 32 is provided with the driven cam surface 52.

The driving cam surface 51 includes a gradual cam portion 51a, a standby contact cam portion 51b, a radical cam portion 51c, and a communication cam portion 51d. The gradual cam portion 51a extends spirally along the circumferential direction of the main driving member 31 so as to be close to the gradual driven member 32. The standby contact cam portion 51b extends so as to be substantially orthogonal to the axis of the accommodating hole 21, and is provided so as to be continuous with the portion of the gradual cam portion 51a closest to the driven member 32. .. The rapid advance cam portion 51c extends substantially linearly along the axis of the accommodating hole 21, and is continuously provided on the standby contact cam portion 51b. The communication cam portion 51d is continuous from the radical cam portion 51c to the portion of the progressive cam portion 51a that is most distant from the driven member 32, and extends so as to be substantially orthogonal to the axis of the accommodating hole 21. It exists. The length of the contact cam portion 51d along the circumferential direction is substantially the same as that of the standby contact cam portion 51b. The distance between the contact cam portion 51d and the standby contact cam portion 51b is configured to substantially coincide with the operation stroke amount of the storage portion 11 in the pump bottle 10. In the illustrated example, the two standby contact cam portions 51b are provided so as to be offset from each other by 180 ° with respect to the axis of the accommodating hole 21, and when the driving member 31 rotates in a preset forward direction, Standby contact cam section 51b → Rapid cam section 51c → Contact cam section 51d → Progressive cam section 51a → Standby contact cam section 51b → Rapid advance cam section 51c → Contact cam section 51d → Progressive cam section 51a The main cam surface 51 is configured to make a round.

On the other hand, the driven cam surface 52 of the driven member 32 has a standby contact portion 52a and a spiral sliding contact portion 52b. The standby contact portion 52a extends so as to be substantially orthogonal to the axis of the accommodating hole 21, so that the length in the circumferential direction is substantially the same as the standby contact cam portion 51b of the driving cam surface 51. It is configured in. The spiral sliding contact portion 52b extends spirally so as to abut on the gradual cam portion 51a when the standby contact portion 52a is brought into contact with the connecting cam portion 51d of the driving cam surface 51.

The urging spring 33 is a coil-shaped spring interposed between the driven member 32 and the unit main body 20 on the other end side of the driven member 32, and the driven member 32 is always the main driving member 31 with respect to the unit main body 20. It is pressed in a direction close to. The urging spring 33 is set to have a spring force (urging force) larger than the spring force of the return spring 14 of the pump bottle 10. In the illustrated example, the urging spring 33 is provided so as to surround the outer peripheral portion of the accommodating hole 21 in the unit main body 20.

A photo sensor 60 is provided on the outer periphery of the driving member 31 in the unit main body 20. The photo sensor 60 detects the rotational position of the driving member 31 with respect to the unit main body 20 via the detection piece 31b provided on the outer peripheral surface of the driving member 31. In the present embodiment, the photo sensor 60 is provided so that the detection piece 31b can be detected when the standby contact cam portion 51b of the driving member 31 comes into contact with the standby contact portion 52a of the driven member 32. .. That is, the driving member 31 has detection pieces 31b at two locations on the outer peripheral surface, and when these detection pieces 31b are detected by the photosensor 60, the standby contact cam portion 51b is the standby contact portion of the driven member 32. It is in a state of being in contact with 52a. When the electric motor 40 described above is driven by pressing the operation switch 43, the photo sensor 60 operates only until the photo sensor 60 detects the next detection piece 31b, and the driving member 31 is moved forward by 180 at a constant speed. ° It is configured to rotate.

In the liquid injection drive unit 100 configured as described above, as shown in FIGS. 8 and 9A, the standby contact cam portion 51b of the main driving member 31 contacts the standby contact portion 52a of the driven member 32. This state is the start standby state of the electric motor 40. In this activation standby state, the driven member 32 is arranged at the position farthest from the main driving member 31 against the spring force of the urging spring 33. At this time, as shown in FIG. 1, the pusher 35 connected to the driven member 32 via the connecting rod 34 is also in the state of being farthest from the driving member 31. Therefore, if the pusher 35 is moved to the retracted position to accommodate the pump bottle 10 in the accommodating hole 21, and then the pusher 35 is returned to the opposite position, the storage portion 11 is arranged in the normal position with respect to the support base portion 12. The pusher 35 can be arranged at a position facing the end surface of the storage portion 11 with respect to the pump bottle 10 of the above. In the work of arranging the pump bottle 10 in the unit main body 20, it is not necessary to perform the connection work for the eye drop supply system, and the sterility work is also unnecessary. Therefore, even in the manufacturing work of the liquid injection device 1 configured by arranging the pump bottle in the liquid injection drive unit 100 and the work of replacing the pump bottle 10 with respect to the liquid injection drive unit 100, the pump bottle 10 is simply performed. It is sufficient to accommodate the liquid in the unit main body 20 of the liquid injection drive unit 100, and there is no possibility that the work will be complicated.

In order to apply the liquid injection device 1 configured as described above to perform eye drops, for example, as shown in FIG. 4, the unit body 20 is held with one hand in a posture in which the front is facing upward, and the injection opening 22b is formed. The unit body 20 may be brought close to the face and the operation switch 43 may be pressed while facing the pupil. At this time, according to the liquid injection device 1 described above, the LED 23 is first lit by pressing the operation switch 43. Therefore, by using the LED 23 as a guide, the position of the pupil is accurately defined with respect to the injection opening 22b. You will be able to. Further, since the cover peripheral wall portion 22c is provided around the injection opening 22b, the posture of the liquid injection device 1 and the position of the injection opening 22b can be obtained by bringing the cover peripheral wall portion 22c into contact with the periphery of the eyes. Not only is stable, but the mutual distance between the pupil and the injection opening 22b can always be constant.

After the liquid injection device 1 is positioned and arranged as described above, when a predetermined time elapses from the pressing operation of the operation switch 43, the electric motor 40 is driven and the photo sensor 60 detects the next detection piece 31b. The driving member 31 will rotate by about 180 ° only until. When the driving member 31 rotates, the driving cam surface 51 sequentially changes with respect to the standby contact portion 52a of the driven member 32, and as shown in FIG. 9B, passes through the radical cam portion 51c and the connecting cam portion. It will be in a state facing 51d. As a result, the driven member 32 momentarily slides toward the driving member 31 due to the spring force of the urging spring 33, and the pressing operation force is applied to the storage portion 11 of the pump bottle 10 via the pusher 35 to return. The storage unit 11 moves to the operating position against the spring force of the spring 14. Therefore, a predetermined amount of eye drops is ejected from the discharge port 13 of the pump bottle 10 through the nozzle 18, and the eye drops are ejected to the user's eye from the injection opening 22b of the unit main body 20.

During this time, in the liquid injection device 1, when the driving member 31 rotates until the detection piece 31b is detected, the progressive cam portion 51a of the driving member 31 is in sliding contact with the spiral sliding contact portion 52b of the driven member 32 to urge the driving member 31. The driven member 32 slides in a direction away from the driving member 31 against the spring force of the spring 33, and when the photosensor 60 detects the detection piece 31b, the electric motor 40 enters the start standby state, and the driving member 31 The rotation stops. At this time, the standby contact cam portion 51b of the main driving member 31 is in contact with the standby contact portion 52a of the driven member 32, and the above-mentioned start standby state is restored. Further, also in the pump bottle 10, the storage portion 11 is returned to the normal position by the return spring 14.

After that, each time the operation switch 43 is pressed, the above operation is repeated, and the eye drops are ejected from the discharge port 13 of the pump bottle 10 each time. In this case, according to the liquid injection device 1, since the injection amount of the eye drops does not depend on the operating force, for example, even when the user with a small operating force operates the eye drops, a necessary and sufficient amount of the eye drops is injected. It becomes possible. Moreover, at the time of instillation, it is not necessary to take a posture in which the face is turned upward, and the eye drops can be performed while facing the front, which is advantageous in terms of operability. When the eye drops in the pump bottle 10 are emptied, as described above, it is not necessary to connect the supply system or sterilize the entire liquid injection device 1, and the empty pump bottle 10 is newly replaced. It may be replaced with the pump bottle 10. As a result, it becomes possible to provide a liquid injection device 1 for quantitatively discharging eye drops easily and economically.

Although the above-described embodiment exemplifies the spraying of eye drops, the spray is not necessarily limited to the spraying of eye drops, and may be sprayed with a medicinal liquid such as a nasal spray or a throat medicine. As described above, in the present invention, since the connection work of the supply system is unnecessary, it is not necessary to perform the sterility work, and it is suitable as a device for injecting a medicinal liquid, but it is also applicable to a device for injecting a non-medicinal liquid. It is possible to do.

Further, in the above-described embodiment, a pump bottle configured to inject a liquid by pressing the storage portion is applied, but in the present invention, the liquid is injected by operating the storage portion. If possible, it is not limited to pressing. Since the pump bottle provided at the support base is applied to the liquid discharge port, there is no possibility that the position of the discharge port will be affected when the liquid is sprayed, and the liquid should be sprayed in a more accurate direction. However, the present invention is not limited to this. Further, the injection direction of the liquid does not have to be oblique to the operation direction of the reservoir. Further, the pump bottle does not necessarily have to be removable from the unit body.

Further, in the above-described embodiment, an electric motor that is rotationally driven is applied as an actuator, but the present invention is not limited to this, and a drive mechanism unit is applied so as to move a storage portion of a pump bottle by applying a linearly moving actuator. It is also possible to configure. Further, since the urging spring, which is a coil-shaped spring, is applied as the urging member and the pump bottle is arranged inside the urging spring, it is possible to reduce the size of the liquid injection device 1. be. However, as the urging member, if the pump bottle can be urged, it is not always necessary to apply a coiled urging spring. When a cam unit provided with a cam mechanism is applied as the drive mechanism unit, in the above-described embodiment, the gradual cam unit is applied when the return operation is performed, so that the electric motor has a relatively small torque and is relatively small. It is possible to shift the urging spring to a bent state even if a thing is applied, but it is not always necessary to apply a cam mechanism portion having a gradual cam portion. In addition, since the actuator is in the start standby state with the storage unit placed in the normal position, it is possible to immediately inject the liquid by driving the actuator, but the actuator is placed in the operating position. May be in the startup standby state.

Further, in the above-described embodiment, an endless annular protrusion is exemplified, but it is not always necessary to apply the endless annular protrusion, and for example, a plurality of protrusions so as to surround the injection opening. It is possible to achieve the same effect even if the above is provided.

Further, in the above-described embodiment, a light projecting member is provided around the injection opening in a portion closer to the injection opening than the protruding portion, and the light is turned on when the operation switch is pressed. Therefore, it is possible to accurately define the position of the pupil with respect to the injection opening, but the light projecting member does not necessarily have to be an LED, and the light projecting member does not necessarily have to be provided.

1 Liquid injection device 10 Pump bottle 11 Storage part 12 Support base 13 Discharge port 20 Unit body 22b Injection opening 22c Cover peripheral wall part (protruding part)
23 LED (light projecting member)
31 Main driving member 32 Driven member 33 Biasing spring (Bending member)
35 Pusher 40 Electric motor 51a Progressive cam section 51c Rapid drive cam section 100 Liquid injection drive unit

Claims

A pump bottle that has a discharge port, a storage unit, and a support base, and discharges the liquid stored in the storage unit from the discharge port when the storage unit moves from the normal position to the operation position with respect to the support base unit. It is a drive unit for liquid injection to operate,
A unit body in which the pump bottle can be arranged with the discharge port exposed to the outside,
A pusher disposed on the unit body in a state where it can face the pump bottle disposed on the unit body and can move along the moving direction of the storage unit.
A drive mechanism unit that moves the pusher between the normal position and the operation position with respect to the unit body by driving the actuator.
A drive unit for liquid injection, characterized in that it is provided with.
In the injection operation in which the storage unit moves from the normal position to the operation position, the drive mechanism unit has a pusher rather than a return operation in which the storage unit moves from the operation position to the normal position. The drive unit for liquid injection according to claim 1, wherein the drive unit is configured to have a high moving speed.
The liquid injection drive unit according to claim 1, wherein the drive mechanism unit is in a start-up standby state of the actuator with the storage unit arranged in the normal position.
The drive mechanism unit includes an urging member and a cam mechanism interposed between the unit body and the pusher.
The urging member urges the pusher so that the storage portion of the pump bottle arranged in the unit main body moves from the normal position to the operating position.
The cam mechanism has a driving member rotated by the actuator and a driven member that slides along the urging direction of the urging member with the rotation of the driving member.
Between the driving member and the driven member, a progressive cam portion in which the ratio of the sliding amount of the driven member to the rotation amount of the driving member is small, and the ratio of the sliding amount of the driven member to the rotation amount of the driving member. The drive unit for liquid injection according to claim 2, wherein the drive unit for rapid driving is provided.
The liquid injection drive unit according to claim 4, wherein the urging member is a coil-shaped spring provided so as to surround the periphery of a pump bottle arranged in the unit body.
The driving member and the driven member each have a cylindrical shape, and the gradual cam portion and the radical cam portion are provided so as to circulate alternately along the peripheral surface of the cylinder.
The liquid injection drive unit according to claim 4, wherein the driving member rotates in one direction at a constant speed when the actuator is driven.
The pusher is provided so as to be movable between a position facing the pump bottle arranged on the unit body and a retracting position not facing the pump bottle.
The drive unit for liquid injection according to claim 1, wherein the pump bottle can be accommodated in the unit main body when the pusher is arranged in the retracted position.
The unit main body is provided with an injection opening for exposing the discharge port of the pump bottle to the outside, and a protrusion is provided on the outer surface of the unit main body so as to be around the injection opening. The drive unit for liquid injection according to claim 1.
The drive for liquid injection according to claim 8, wherein the unit main body is provided with a light projecting member around the injection opening and closer to the injection opening than the protrusion. unit.
A liquid injection device characterized in that a pump bottle is arranged in the unit body of the liquid injection drive unit according to any one of claims 1 to 9.
The liquid injection device according to claim 10, wherein a liquid eye drop is stored in the storage portion of the pump bottle.