JP7218064B2 - Syringe type discharge container - Google Patents

Description

TECHNICAL FIELD The present invention relates to a syringe-type dispensing container comprising a syringe and a plunger that can be pushed into the syringe.

As a syringe-type discharge container provided with a syringe and a plunger that can be pushed into the syringe, conventionally, the plunger is locked to the syringe at each predetermined pushing amount, so that it is possible to push it in multiple times. Are known. According to such a fixed-quantity syringe-type discharge container, the content filled in one syringe can be divided and discharged.

For example, in Patent Document 1, a plunger is provided with a piston holding member provided with at least one arm having a piston and extending rearwardly, and a piston holding member arranged behind the piston holding member to axially press the arm. and a plunger operation member for pushing the piston holding member into the syringe, and a sliding protrusion that deforms the arm inward while entering from the rear end opening of the syringe and sliding on the inner peripheral surface of the syringe. and a locking projection arranged behind the sliding projection and locked to the rear end of the syringe so as to stop the plunger from being pushed into the syringe, and the arm is deformed inward. When the plunger operation member is pushed in in this state, when the plunger operation member is released, the engagement of the locking projection with respect to the rear end of the syringe is released, and the plunger can be pushed in again. A syringe-type discharge container is disclosed in which the plunger can be pushed into the syringe in two steps.

Further, in Patent Document 2, by providing a plurality of intermediate members each having an arm between a piston holding member (front end member) and a plunger operation member (rear end member), the plunger can be moved three times or more. A syringe-type discharge container configured to be able to be pushed into the syringe in multiple times is described.

Japanese Patent No. 6306245 Japanese Patent No. 5847662

The conventional syringe-type discharge container described in Patent Document 1 has a configuration in which the plunger can be pushed into the syringe in two batches, so it is used for applications in which the contents are discharged in three or more batches. I have a problem that I can't.

On the other hand, in the conventional syringe-type discharge container described in Patent Document 2, the plunger can be pushed into the syringe in multiples of three or more times. Although it can be used for ejection, there is a problem that the number of parts increases because it is necessary to provide a large number of intermediate members corresponding to the number of times of pressing.

The present invention has been made in view of such problems, and its object is to reduce the number of parts of a syringe-type discharge container that can be pushed into a syringe by dividing the plunger into three or more times. .

A syringe-type discharge container of the present invention includes a syringe and a plunger that can be pushed into the syringe, and the syringe has a first inner peripheral surface and a restoring force forward of the first inner peripheral surface. The plunger has a second inner peripheral surface provided to sandwich the recess, a first locking surface at the rear end, and a second locking surface at the rear end of the second inner peripheral surface. a piston retaining member provided with at least one rearwardly extending arm having a . and a plunger operation member, wherein the arm deforms inward when entering from the rear end opening of the syringe and sliding on the first inner peripheral surface and the second inner peripheral surface. a sliding projection disposed behind the sliding projection and engaged with the first locking surface and the second locking surface of the syringe so as to stop the plunger from being pushed into the syringe; The sliding projection and the locking projection are accommodated in the restoration recess at the same time so that the arm can be restored to its original shape. When the plunger operating member is pushed in with the arm deformed inward, the locking protrusion is configured to move from the first locking surface to the first locking surface when the plunger operating member is released from being pushed. It is characterized in that it is configured such that the locking with the second locking surface is released and the plunger can be pushed in again.

In the above configuration, the syringe-type discharge container of the present invention has at least one sub-arm extending rearward and has a sub-stopper member disposed between the piston holding member and the plunger operating member, The sub-stopper member is configured such that the sub-arm is pushed into the syringe by the plunger operation member and pushes the arm of the piston holding member, and the sub-arm is configured to press the rear end opening of the syringe. a sub-sliding projection that deforms the sub-arm inwardly when it enters from a portion and slides on at least the first inner peripheral surface; and the syringe of the plunger that is arranged behind the sub-sliding projection A sub-locking projection that is locked to at least the first locking surface of the syringe is provided so as to stop the inward push-in, and the sub-sliding projection and the sub-locking projection are: The sub-locking protrusion has a size that allows the sub-arm to be restored to its original shape when simultaneously accommodated in the restoring recess, and the sub-locking protrusion deforms the sub-arm inward. When the plunger operating member is pushed in with the plunger operating member being pushed in, when the pushing of the plunger operating member is released, the locking with the first locking surface is released, and the plunger can be pushed in again. Preferably, it should be

In the syringe-type discharge container of the present invention, in the configuration described above, the axial distance between the locking projection and the secondary locking projection is equal to the axial distance between the first locking surface and the second locking surface. preferably greater than

ADVANTAGE OF THE INVENTION According to this invention, the number of parts of the syringe type|mold discharge container which can be pushed into a syringe by dividing a plunger into three times or more can be reduced.

1 is a side half cross-sectional view of a syringe-type discharge container according to an embodiment of the present invention; FIG. Fig. 10 is a half cross-sectional view of the syringe-type dispensing container after the first depression of the plunger has been completed; Fig. 10 is a half cross-sectional view of the syringe-type dispensing container with the plunger unlocked after the first depression of the plunger is completed; FIG. 11 is a half cross-sectional view of the syringe-type dispensing container with the arm restored to its original shape by the second depression of the plunger; Fig. 10 is a half cross-sectional view of the syringe-type dispensing container after the second depression of the plunger has been completed; FIG. 10 is a half cross-sectional view of the syringe-type dispensing container with the plunger unlocked after completing the second depression of the plunger; Fig. 10 is a half cross-sectional view of the syringe-type dispensing container after the third depression of the plunger has been completed; FIG. 10 is a half cross-sectional view of the syringe-type dispensing container with the plunger unlocked after completing the third depression of the plunger; FIG. 10 is a half cross-sectional view of the syringe-type dispensing container after the fourth depression of the plunger is completed;

Hereinafter, the syringe-type discharge container of the present invention will be described more specifically by way of example with reference to the drawings.

The syringe-type discharge container 1, which is one embodiment of the present invention, is used for an application containing a medicine that needs to be administered to a plurality of places in fixed amounts, such as a tick and flea extermination drug for pets. It is possible.

As shown in FIG. 1 , the syringe-type discharge container 1 includes a syringe 10 and a plunger 20 that can be pushed into the syringe 10 .

In this embodiment, the syringe 10 is of an assembly type and has a syringe body portion 11 , a nozzle cap 12 and an end cap portion 13 .

In the present specification and claims, the end cap portion 13 is attached to the syringe body portion 11 with the side (left side in FIG. 1) to which the nozzle cap 12 is attached to the syringe body portion 11 being forward. The side (the right side in FIG. 1) is the rear. It should be noted that the axis of the syringe 10 is the axis O. As shown in FIG.

The syringe main body 11 is cylindrically formed from a synthetic resin material. The syringe main body 11 can also be made of glass.

The nozzle cap 12 is made of a synthetic resin material and has a cylindrical shape with a top. The nozzle cap 12 has a cylindrical nozzle portion 12a having a diameter smaller than that of the syringe body portion 11, and a content communicating with the internal space of the syringe body portion 11 at the front end of the nozzle portion 12a. The discharge port 12b is open.

The end cap portion 13 is provided with a cylindrical body portion 13a formed of a synthetic resin material. It is fixed to the body portion 11 . A stepped portion 13b is provided on the inner surface of the cylindrical body portion 13a, and the rear end of the syringe main body portion 11 abuts on the stepped portion 13b from the direction of the axis O, so that the end cap portion 13 is axially attached to the syringe main body portion 11. positioned in the direction

A flange-like finger hooking portion 13c is integrally provided on the outer peripheral surface of the cylinder portion 13a. A rear end of the cylindrical body portion 13a is integrally provided with an annular protrusion 13d that protrudes radially inward (in a direction perpendicular to the axis O) from the inner peripheral surface of the rear end. .

The inner diameter of the protrusion 13d is the same as the inner diameter of the syringe main body 11, and the inner peripheral surface of the protrusion 13d and the inner peripheral surface of the syringe main body 11 constitute the inner peripheral surface of the syringe 10, respectively. That is, the syringe 10 has, as its inner peripheral surface, a first inner peripheral surface 14 formed by the inner peripheral surface of the protrusion 13d and an inner peripheral surface of the syringe main body 11 formed by the first inner peripheral surface 14. and a second inner peripheral surface 15 disposed forwardly.

The rear end portion of the end cap portion 13 is open, and the rear end serves as a first locking surface 16 . Further, the rear end of the syringe body portion 11 arranged inside the cylindrical body portion 13 a forms a second locking surface 17 that continues to the second inner peripheral surface 15 . The first locking surface 16 and the second locking surface 17 each have a plane portion perpendicular to the axial direction of the syringe 10 .

In a portion of the inner peripheral surface of the syringe 10 between the first inner peripheral surface 14 and the second inner peripheral surface 15, a A receding recess 18 is provided. That is, the first inner peripheral surface 14 and the second inner peripheral surface 15 are provided with the restoration concave portion 18 interposed therebetween.

The plunger 20 has a piston holding member 30 , a sub-stopper member 40 arranged behind the piston holding member 30 , and a plunger operation member 50 arranged behind the sub-stopper member 40 .

The piston holding member 30 has a columnar main body 31 with a slightly smaller diameter than the inner diameters of the first inner peripheral surface 14 and the second inner peripheral surface 15, and a piston 32 is held at the front end of the main body 31 by screwing. . The piston 32 is made of an elastic material such as synthetic rubber, is arranged inside the syringe main body 11, and is slidable on the inner peripheral surface (second inner peripheral surface 15) of the syringe main body 11. . The internal space between the piston 32 of the syringe 10 and the nozzle portion 12a serves as a filling space S in which the content is filled. When the piston 32 moves forward, the content filled in the filling space S is discharged to the outside from the discharge port 12b of the nozzle portion 12a.

An arm 33 is provided integrally with the main body 31 . In this embodiment, two arms 33 are provided facing each other across the axis, but the number of arms 33 can be varied as long as at least one arm 33 is provided.

The arms 33 each have a flat plate shape and extend rearward from the main body 31 . By applying an external force, the arm 33 can be elastically deformed so as to bend radially inward from the connection portion with the main body 31 as a starting point. Further, each arm 33 can be restored to its original shape (the shape shown in FIG. 1) when the external force is released.

The shape of the arm 33 is not limited to a flat plate shape, and can be variously changed as long as the above-described elastic deformation and restoration are possible.

Each arm 33 is integrally provided with a sliding projection 34 . A pair of sliding protrusions 34 provided on each arm 33 are arranged symmetrically with the axis O interposed therebetween.

Each of the sliding projections 34 has a wedge shape in which a surface facing radially outward is inclined so as to protrude radially outward gradually from the front side toward the rear side. The radial distance from the axis O at the front end portion of the sliding projection 34 is smaller than the radii of the first inner peripheral surface 14 and the second inner peripheral surface 15 . On the other hand, the radial distance from the axis O at the rear end portion of the sliding projection 34 is larger than the radii of the first inner peripheral surface 14 and the second inner peripheral surface 15, and is equal to or less than the radius of the restoration recess 18. ing. When the plunger 20 is pushed forward, these sliding protrusions 34 enter the inside of the syringe 10 from the rear end opening of the syringe 10 and reach the first inner peripheral surface 14 to the second inner peripheral surface 15 of the syringe 10. By sliding against the arm 33, the arm 33 can be elastically deformed radially inward.

Each arm 33 is integrally provided with a locking projection 35 . A pair of locking projections 35 provided on each arm 33 are arranged symmetrically with the axis O interposed therebetween.

Each of the locking projections 35 is spaced behind the sliding projection 34 and protrudes radially outward so as to have the same height as the rear end of the sliding projection 34 . Further, each of the locking projections 35 is elastically deformed so that the portion between the sliding projection 34 and the locking projection 35 of the arm 33 bends radially outward. direction can protrude outward.

A step 36 recessed forward is provided on the inner peripheral side of the rear end of the locking projection 35 . The front end of the main body 41 of the sub-stopper member 40 , which will be described later, engages with the step 36 while being pushed forward, thereby restricting elastic deformation of the locking projection 35 inward in the radial direction.

Therefore, even if the plunger 20 is pushed into the syringe 10 in a state in which the sliding protrusions 34 are in sliding contact with the first inner peripheral surface 14 and the arms 33 are flexed radially inward, the respective locking protrusions 35 will remain closed. can contact the first locking surface 16 of the syringe 10 . Thereby, each locking projection 35 is locked to the first locking surface 16 so as to stop the pushing of the plunger 20 into the syringe 10 . In addition, even if the plunger 20 is further pushed into the syringe 10 in a state in which the sliding projections 34 are in sliding contact with the second inner peripheral surface 15 and the arms 33 are flexed radially inward, the locking projections will not be engaged. 35 can contact the second locking surface 17 of the syringe 10 . Thereby, each locking projection 35 is locked to the second locking surface 17 so as to stop the plunger 20 from being pushed into the syringe 10 . Thus, the locking projection 35 functions as a stopper that restricts the plunger 20 from entering the syringe 10 .

On the other hand, as described above, when the plunger 20 is pushed into the syringe 10 in a state in which the sliding projection 34 is in sliding contact with the first inner peripheral surface 14 and the arm 33 is bent radially inward, the plunger 20 is pushed into the syringe 10 . When the forward pressing force applied to the rear end of the locking projection 35 by the stopper member 40 is released, the bending of the arm 33 is restored. The engagement with the step 36 is released. As a result, the locking projection 35 moves radially inward to the same extent as the sliding projection 34, and the locking of the locking projection 35 with the first locking surface 16 or the second locking surface 17 is released. The plunger 20 can be pushed in again.

The sliding projection 34 and the locking projection 35 provided on one arm 33 are provided with a size or an interval that can be accommodated in the restoration recess 18 at the same time. When the sliding projection 34 and the locking projection 35 are accommodated in the restoration recess 18 at the same time, the sliding projection 34 or the locking projection 35 are radially inwardly moved by the first inner peripheral surface 14 or the second inner peripheral surface 15 . Without being pushed in, the arm 33 can restore its original shape (the shape shown in FIG. 1).

The main body 31 is integrally provided with a cylindrical shaft 37 extending rearward along the axis O thereof. A connecting head 37 a is provided at the rear end of the shaft 37 .

The sub-stopper member 40 has a cylindrical main body 41 with a slightly smaller diameter than the inner diameters of the first inner peripheral surface 14 and the second inner peripheral surface 15 . A locking projection 41a is provided on the inner peripheral surface of the rear end side of the main body 41, and by locking the head 37a of the shaft 37 of the piston holding member 30 inserted into the main body 41 with the locking projection 41a, the sub stopper Member 40 is connected to the rear of piston holding member 30 . At this time, the head 37a is locked to the locking projection 41a with play in the front-rear direction. As a result, the auxiliary stopper member 40 is connected to the piston holding member 30 so as to be relatively movable in the front-rear direction to the extent that the main body 41 can be engaged with and disengaged from the step 36 .

As described above, the front end of the main body 41 can abut on the step 36 of the locking projection 35 of the piston holding member 30 . As a result, the secondary stopper member 40 can press the arm 33 of the piston holding member 30 when pushed toward the inside of the syringe 10 by a plunger operating member 50, which will be described later.

The main body 41 is integrally provided with a sub arm 43 having the same configuration as the arm 33 of the piston holding member 30 . In this embodiment, two sub arms 43 are provided facing each other across the axis, but the number of sub arms 43 can be varied as long as at least one sub arm 43 is provided.

The sub arms 43 each have a flat plate shape and extend rearward from the main body 41 . By applying an external force, the sub arm 43 can be elastically deformed so as to flex radially inward from the connecting portion with the main body 41 as a starting point. Further, each sub arm 43 can be restored to its original shape (the shape shown in FIG. 1) when the external force is released.

The shape of the sub arm 43 is not limited to a flat plate shape, and can be variously changed as long as the above-described elastic deformation and restoration are possible.

Each sub arm 43 is integrally provided with a sub sliding projection 44 . A pair of sub-sliding protrusions 44 provided on each sub-arm 43 are arranged symmetrically with the axis O interposed therebetween.

Each secondary sliding projection 44 has the same shape as the sliding projection 34 of the piston holding member 30 . That is, each secondary sliding projection 44 has a wedge shape in which the surface facing radially outward is inclined so as to protrude radially outward gradually from the front side toward the rear side. The radial distance from the axis O at the front end portion of the secondary sliding protrusion 44 is smaller than the radii of the first inner peripheral surface 14 and the second inner peripheral surface 15 . On the other hand, the radial distance from the axis O at the rear end portion of the secondary sliding projection 44 is greater than the radii of the first inner peripheral surface 14 and the second inner peripheral surface 15 and equal to or less than the radius of the restoration recess 18 . It's becoming When the plunger 20 is pushed forward, these secondary sliding protrusions 44 enter the interior of the syringe 10 from the rear end opening of the syringe 10, and extend from the first inner peripheral surface 14 to the second inner peripheral surface 15 of the syringe 10. By sliding against, the sub arm 43 can be elastically deformed radially inward.

Each sub arm 43 is integrally provided with a sub locking projection 45 . A pair of sub-locking projections 45 provided on each sub-arm 43 are arranged symmetrically with the axis O interposed therebetween.

Each secondary locking projection 45 has the same shape as the locking projection 35 of the piston holding member 30 . That is, each secondary locking projection 45 is arranged behind the secondary sliding projection 44 with an interval therebetween, and extends radially outward so as to be at the same height as the rear end portion of the secondary sliding projection 44. Protruding. In addition, each secondary locking projection 45 is elastically deformed such that the portion between the secondary sliding projection 44 and the secondary locking projection 45 of the secondary arm 43 is bent radially outward. It can protrude further radially outward than 44 .

A step 46 recessed forward is provided on the inner peripheral side of the rear end of the sub-locking projection 45 . The front end of the main body 51 of the plunger operating member 50 , which will be described later, engages with the step 46 while being pushed forward, thereby restricting the radially inward elastic deformation of the sub-locking projection 45 .

Therefore, even if the plunger 20 is pushed into the syringe 10 in a state where the sub-sliding projection 44 is in sliding contact with the first inner peripheral surface 14 and the sub-arm 43 is flexed radially inward, each sub-engagement will still work. The stop projection 45 can contact the first locking surface 16 of the syringe 10 . As a result, each sub-locking projection 45 is locked to the first locking surface 16 so as to stop the pushing of the plunger 20 into the syringe 10 . Further, even if the plunger 20 is further pushed into the syringe 10 in a state in which the sub-sliding protrusion 44 is in sliding contact with the second inner peripheral surface 15 and the sub-arm 43 is bent radially inward, The locking projection 45 can contact the second locking surface 17 of the syringe 10 . As a result, each secondary locking projection 45 is locked to the second locking surface 17 so as to stop the pushing of the plunger 20 into the syringe 10 . In this way, the sub-locking protrusion 45 functions as a stopper that restricts the entry of the plunger 20 into the syringe 10 .

On the other hand, as described above, when the plunger 20 is pushed into the syringe 10 in a state in which the sub-sliding protrusion 44 is in sliding contact with the first inner peripheral surface 14 and the sub-arm 43 is bent radially inward, When the forward pressing force applied to the rear end of the sub-locking projection 45 by the plunger operation member 50 is released, the bending of the sub-arm 43 is restored, and the main body 51 is pushed backward by this restoring force. The engagement of the main body 51 with the step 46 is released. As a result, the sub-locking projection 45 moves radially inward to the same degree as the sub-sliding projection 44, and the locking of the sub-locking projection 45 with the first locking surface 16 or the second locking surface 17 is disengaged. It is released and the plunger 20 can be pushed again.

The sub-sliding protrusion 44 and the sub-locking protrusion 45 provided on one sub-arm 43 are provided at a size or interval that can be accommodated in the restoration recess 18 at the same time. When the secondary sliding projection 44 and the secondary locking projection 45 are accommodated in the restoration recess 18 at the same time, the secondary sliding projection 44 or the secondary locking projection 45 are pushed by the first inner peripheral surface 14 or the second inner peripheral surface 15. The sub arm 43 can be restored to its original shape (the shape shown in FIG. 1) without being pushed radially inward.

Further, the distance between the locking projection 35 provided on the piston holding member 30 and the auxiliary locking projection 45 provided on the auxiliary stopper member 40 in the direction along the axis O is the first locking surface 16 and the second locking surface 16 . It is larger than the distance along the axis O from the surface 17 . Therefore, when the locking projection 35 is locked to the second locking surface 17 , the secondary locking projection 45 is located behind the first locking surface 16 .

The main body 41 is integrally provided with a cylindrical shaft 47 extending rearward along the axis O thereof. A connecting head 47 a is provided at the rear end of the shaft 47 .

The plunger operating member 50 has a cylindrical main body 51 with a slightly smaller diameter than the inner diameters of the first inner peripheral surface 14 and the second inner peripheral surface 15 . A locking projection 51a is provided on the inner peripheral surface of the rear end side of the main body 51. By locking the head 47a of the shaft 47 of the sub stopper member 40 inserted into the main body 51 with the locking projection 51a, the plunger can be operated. The member 50 is connected to the rear of the sub stopper member 40 . At this time, the head 47a is locked to the locking projection 51a with play in the front-rear direction. Thereby, the plunger operation member 50 is connected to the auxiliary stopper member 40 so as to be relatively movable in the front-rear direction to the extent that the main body 51 can be engaged with and disengaged from the step 46 .

An operation flange portion 52 is integrally provided at the rear end of the main body 51 . The user can push the plunger 20 toward the inside of the syringe 10 by pushing the operation flange portion 52 .

As described above, the front end of the main body 51 can abut on the step 46 of the locking projection 45 of the sub-stopper member 40 . Thereby, the plunger operating member 50 can press the arm 43 of the auxiliary stopper member 40 when the operating flange portion 52 is pushed forward toward the syringe 10 side.

By pushing the operating flange portion 52 of the plunger operating member 50 forward in this manner, the main body 51 presses the arm 43 of the sub-stopper member 40 , and the main body 41 of the sub-stopper member 40 pushes the piston holding member 30 . The plunger 20 can be pushed toward the inside of the syringe 10 so that the arm 33 of is pressed.

Next, a method of using the syringe-type discharge container 1 having the above configuration will be described.

First, in the state shown in FIG. 1, the user holds the syringe-type discharge container 1 by placing the index finger and the middle finger on the finger hooking portion 13c and placing the thumb on the rear end surface of the operating flange portion 52 of the plunger operating member 50. As shown in FIG. Next, the operating flange portion 52 is pushed forward to push the plunger operating member 50 , that is, the plunger 20 toward the inside of the syringe 10 .

When the plunger 20 advances toward the inside of the syringe 10, as shown in FIG. Elastically deforms inward. At this time, the front end of the main body 41 of the auxiliary stopper member 40 is kept engaged with the step 36 by the forward pressing force, so that the locking projection 35 protrudes radially outward beyond the first inner peripheral surface 14 . , and is locked to the first locking surface 16 .

Thus, when the locking projection 35 provided on the piston holding member 30 is locked to the first locking surface 16 provided at the rear end of the syringe 10, the plunger 20 can be pushed into the syringe 10. become unable. As a result, the first pushing operation of the plunger 20 is completed. The first pushing operation of the plunger 20 can be performed as a degassing step for discharging the air mixed in the contents filled in the filling space S to the outside from the discharge port 12b. It can also be carried out as a process for discharging a fixed amount of the content filled in the container from the discharge port 12b.

Next, when the plunger operating member 50 is released from being pushed, the main body 41 is pushed back rearward by the restoring force against the bending deformation of the arm 33, and the engagement of the main body 41 with the step 36 is released, as shown in FIG. be. As a result, the locking projection 35 moves radially inward to the same extent as the sliding projection 34 , and the locking of the locking projection 35 with the first locking surface 16 is released. Therefore, the plunger 20 can be pushed in again.

By further pushing the plunger operation member 50, as shown in FIG. 4, the plunger 20 can be advanced to discharge the contents from the discharge port 12b. At this time, the pressing force is transmitted from the auxiliary stopper member 40 to the piston holding member 30 by bringing the front end of the main body 41 into contact with the rear end of the locking projection 35 (the portion radially outside the step 36).

Further, during the pushing, the sliding projection 34 and the locking projection 35 provided on the arm 33 of the piston holding member 30 move radially outward due to the restoring force of the arm 33 when they reach the restoring recess 18, It will be in a state of being accommodated inside the restoration recess 18 at the same time. As a result, the arm 33 is restored to its original shape and the main body 41 is engaged with the step 36, so that the piston holding member 30 can function as a stopper again.

5, the sliding protrusion 34 provided on the arm 33 of the piston holding member 30 slides on the second inner peripheral surface 15, and the arm 33 elastically moves inward. transform. At this time, the front end of the main body 41 of the auxiliary stopper member 40 is kept engaged with the step 36 by the forward pressing force, so that the locking projection 35 protrudes radially outward beyond the second inner peripheral surface 15 . , and is locked to the second locking surface 17 .

Thus, when the locking projection 35 provided on the piston holding member 30 is locked to the second locking surface 17 provided inside the syringe 10, the plunger 20 can be pushed into the syringe 10. Gone. This completes the second pushing operation of the plunger 20 . By the second pushing operation of the plunger 20, the content filled in the filling space S can be discharged from the discharge port 12b at a fixed amount.

Next, when the plunger operating member 50 is released from being pushed, the main body 41 is pushed back rearward by the restoring force against the bending deformation of the arm 33, and the engagement of the main body 41 with the step 36 is released, as shown in FIG. be. As a result, the locking projection 35 moves radially inward to the same extent as the sliding projection 34 , and the locking of the locking projection 35 with the second locking surface 17 is released. Also, in this state, the sub-locking projection 45 provided on the sub-arm 43 of the sub-stopper member 40 is spaced rearward from the first locking surface 16 . Therefore, the plunger 20 can be pushed in again.

By further pushing the plunger operation member 50, the plunger 20 can be advanced to discharge the contents from the discharge port 12b. At this time, the pressing force is transmitted from the auxiliary stopper member 40 to the piston holding member 30 by bringing the front end of the main body 41 into contact with the rear end of the locking projection 35 (the portion radially outside the step 36).

When the plunger 20 moves forward, as shown in FIG. 7, the sub-sliding protrusion 44 provided on the sub-arm 43 of the sub-stopper member 40 slides on the first inner peripheral surface 14, causing the sub-arm 43 to move inward. elastically deformed. At this time, the front end of the main body 51 of the plunger operating member 50 is kept engaged with the step 46 by the forward pressing force, so that the sub-locking projection 45 is radially outward of the first inner peripheral surface 14 . It protrudes and is locked by the first locking surface 16 .

Thus, when the sub-locking projection 45 provided on the sub-stopper member 40 is locked on the first locking surface 16 provided on the rear end of the syringe 10, the plunger 20 can be pushed into the syringe 10. I can't do it. This completes the third pushing operation of the plunger 20 . By the third pushing operation of the plunger 20, the content filled in the filling space S can be discharged from the discharge port 12b at a fixed amount.

The gap between the locking projection 35 provided on the piston holding member 30 and the sub-locking projection 45 provided on the sub-stopper member 40 in the direction along the axis O is restored to the deflection of the arm 33 so that the piston holding member 30 If the length plus the distance that the auxiliary stopper member 40 retreats is set to be twice the interval in the direction along the axis O between the first locking surface 16 and the second locking surface 17, the second The same amount of content can be discharged at a constant rate by the pushing operation and the third pushing operation.

Next, when the plunger operating member 50 is released from being pushed, the main body 51 is pushed back rearward by the restoring force against the bending deformation of the sub arm 43, and the engagement of the main body 51 with the step 46 is released, as shown in FIG. be done. As a result, the secondary locking projection 45 moves radially inward to the same extent as the secondary sliding projection 44 , and the locking of the secondary locking projection 45 with the first locking surface 16 is released. Also, in this state, the locking projection 35 provided on the arm 33 of the piston holding member 30 is slidable on the second inner peripheral surface 15 . Therefore, the plunger 20 can be pushed in again.

By further pushing the plunger operation member 50, the plunger 20 can be moved forward and the contents can be discharged from the discharge port 12b. At this time, the transmission of the pressing force from the plunger operating member 50 to the sub-stopper member 40 is performed by contacting the front end of the main body 51 with the rear end of the sub-locking projection 45 (the portion radially outside the step 46). .

Further, during the pressing, when the sub-sliding projection 44 and the sub-locking projection 45 provided on the sub-arm 43 of the sub-stopper member 40 reach the restoring recess 18, the restoring force of the sub-arm 43 causes the sub-sliding projection 44 and the sub-locking projection 45 to move outward in the radial direction. , and are housed inside the restoration recess 18 at the same time. As a result, the sub arm 43 is restored to its original shape and the main body 51 is engaged with the step 46, so that the sub stopper member 40 can function as a stopper again.

When the plunger 20 moves forward, as shown in FIG. 9, the sub-sliding protrusion 44 provided on the sub-arm 43 of the sub-stopper member 40 slides on the second inner peripheral surface 15, causing the sub-arm 43 to move inward. elastically deformed. At this time, the front end of the main body 51 of the plunger operating member 50 is kept engaged with the step 46 by the forward pressing force, so that the sub-locking projection 45 is radially outward of the second inner peripheral surface 15 . It protrudes and is locked by the second locking surface 17 . The operation flange portion 52 is also locked to the first locking surface 16 .

In this way, the sub-locking protrusion 45 provided on the sub-stopper member 40 is locked on the second locking surface 17 provided inside the syringe 10, and the operation flange portion 52 is on the first locking surface 16. Once locked, the plunger 20 cannot be pushed inside the syringe 10 . This completes the fourth pushing operation of the plunger 20 . By the fourth pushing operation of the plunger 20, the content filled in the filling space S can be discharged from the discharge port 12b at a fixed amount.

The gap between the locking projection 35 provided on the piston holding member 30 and the sub-locking projection 45 provided on the sub-stopper member 40 in the direction along the axis O is restored to the deflection of the arm 33 so that the piston holding member 30 If the length plus the distance that the auxiliary stopper member 40 retreats is set to be twice the interval in the direction along the axis O between the first locking surface 16 and the second locking surface 17, the second The same amount of contents can be discharged at a constant rate by the pushing operation, the third pushing operation, and the fourth pushing operation.

As described above, in the syringe-type discharge container 1 of the present invention, the recess 18 for restoring the arm 33 to its original shape is provided on the inner peripheral surface of the syringe 10, and the arm 33 of the piston holding member 30 is provided with the recess. Since the locking protrusion 35 can be locked to the first locking surface 16 provided at the rear end of the syringe 10 and the second locking surface 17 provided inside the syringe 10, one piston Retaining member 30 may allow three to four metered depressions of plunger 20 . Therefore, it is possible to reduce the number of parts required to push the plunger 20 into the syringe 10 three or more times.

It goes without saying that the present invention is not limited to the above-described embodiments, and that various modifications can be made without departing from the spirit of the present invention.

For example, a configuration in which three or more arms 33 and three or more sub-arms 43 are provided can be employed. By arranging an even number of arms 33 and sub-arms 43 as in the present embodiment, the balance around the axis O is stabilized, so good operation can be achieved.

In addition, in the above-described embodiment, the syringe 10 is of an assembly type.

Furthermore, in the above-described embodiment, one secondary stopper member 40 is provided between the piston holding member 30 and the plunger operating member 50 to increase the number of times the plunger 20 can be pushed by a fixed amount. A configuration in which the stopper member 40 is not provided may be adopted. Also, two or more sub-stopper members 40 may be provided between the piston holding member 30 and the plunger operating member 50 . By providing the sub-stopper member 40 between the piston holding member 30 and the plunger operating member 50, the number of times the plunger 20 can be pushed by a fixed amount per sub-stopper member 40 can be increased by one or two times.

Furthermore, in the above-described embodiment, when the sub-locking projection 45 provided on the sub-stopper member 40 is locked on the second locking surface 17, the operating flange portion 52 provided on the plunger operating member 50 is pushed to the second position. 1 locking surface 16, but by extending the length of the main body 51, the secondary locking projection 45 provided on the secondary stopper member 40 is locked to the second locking surface 17. The operation flange portion 52 provided on the plunger operation member 50 may be arranged rearwardly with a predetermined distance from the first locking surface 16 when the plunger operation member 50 is closed. As a result, the number of times the plunger 20 can be pushed by a fixed amount can be further increased by one.

Furthermore, the contents to be filled in the syringe 10 are not limited to medicines that need to be administered in fixed amounts to multiple sites, such as tick and flea extermination medicines for pets, and various substances can be used.

1 Syringe type discharge container 10 Syringe 11 Syringe body 12 Nozzle cap 12a Nozzle 12b Discharge port 13 End cap 13a Cylindrical body 13b Step 13c Finger hook 13d Projection 14 First inner peripheral surface 15 Second inner peripheral surface 16 First locking surface 17 Second locking surface 18 Restoring concave portion 20 Plunger 30 Piston holding member 31 Main body 32 Piston 33 Arm 34 Sliding protrusion 35 Locking protrusion 36 Step 37 Shaft 37a Head 40 Sub stopper member 41 Main body 41a Locking Projection 43 Sub-arm 44 Sub-sliding projection 45 Sub-locking projection 46 Step 47 Shaft 47a Head 50 Plunger operation member 51 Body 51a Locking projection 52 Operation flange O Axis S Filling space

Claims (3)

comprising a syringe and a plunger pushable into the syringe;
The syringe has an inner peripheral surface that has a first inner peripheral surface and a second inner peripheral surface that is provided in front of the first inner peripheral surface with a restoration concave portion sandwiched therebetween, and has a first engagement at the rear end. a surface, having a second locking surface at the rear end of said second inner peripheral surface;
The plunger includes a piston holding member provided with at least one arm having a piston and extending rearward, and a piston holding member disposed behind the piston holding member and axially pressing the arm to push the piston holding member. a plunger operating member for pushing into the syringe;
The arm includes a sliding protrusion that deforms the arm inward when entering from the rear end opening of the syringe and sliding on the first inner peripheral surface and the second inner peripheral surface; A locking projection is provided behind the projection and locked to the first locking surface and the second locking surface of the syringe so as to stop the plunger from being pushed into the syringe. and
The sliding projection and the locking projection have a size that allows the arm to be restored to its original shape when simultaneously accommodated in the restoration recess,
When the plunger operation member is pushed in with the arm deformed inward, the locking protrusion is in contact with the first locking surface or the second locking surface when the plunger operation member is released. A syringe-type discharge container, characterized in that it is constructed so that the locking can be released and the plunger can be pushed in again. a secondary stopper member having at least one rearwardly extending secondary arm and disposed between the piston holding member and the plunger operating member;
The sub stopper member is configured to be pushed into the syringe by the sub arm being pressed by the plunger operation member and to press the arm of the piston holding member,
The sub-arm includes a sub-sliding projection that deforms the sub-arm inward when it enters from the rear end opening of the syringe and slides at least on the first inner peripheral surface; and a sub-locking projection that is disposed rearwardly and is locked to at least the first locking surface of the syringe so as to stop the plunger from being pushed into the syringe,
The secondary sliding projection and the secondary locking projection have a size that allows the secondary arm to be restored to its original shape when simultaneously housed in the restoration recess,
When the plunger operating member is pushed in with the sub arm deformed inward, the sub locking projection is released from locking with the first locking surface when the plunger operating member is released. 2. The syringe-type dispensing container according to claim 1, wherein said plunger is configured to be re-depressible. 3. The syringe-type ejection according to claim 2, wherein the axial spacing between the locking projection and the secondary locking projection is greater than the axial spacing between the first locking surface and the second locking surface. container.

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