JP5940438B2 - Metered syringe type ejector - Google Patents

Description

  TECHNICAL FIELD The present invention relates to a quantitative syringe type ejector including a syringe having a finger hook and a piston that can be pushed into the syringe, and relates to a technique for taking out the contents filled in one syringe in small portions. It is.

  As the syringe-type ejector, for example, a piston (gasket) having a plunger rod (plunger) is disposed in the syringe, thereby forming a filling space for contents (for example, a chemical solution) between the syringe and the piston. In some cases, the contents of the filling space are taken out to the outside by pressing the plunger rod (see, for example, Patent Document 1).

JP 7-213612 A

  However, since the conventional syringe-type ejector is pushed in at a stroke without being regulated in the syringe, it is difficult to take out the contents filled in one syringe.

  An object of the present invention is to provide a novel metering syringe type ejector that can take out the contents filled in one syringe in small portions.

The quantitative syringe-type ejector of the present invention is
A syringe having a finger hook, a piston that is arranged inside the syringe to form a filling space for contents, and a plunger rod that pushes the piston forward;
The plunger rod has a plurality of annular protrusions arranged at intervals along the rod body,
The syringe has a bent piece that can be tilted around an elastic base that can be deformed and restored,
The bent piece is formed of a front side extension part inclined toward the rod body and a rear side extension part,
When the front side extension part pushes in the plunger rod, the rear side extension part is tilted toward the rod main body side by being pushed open by the annular protrusion,
The extension on the rear side comes into contact with other annular protrusions arranged rearward as the bent piece tilts, and the annular protrusion is pushed back by releasing the plunger rod to return the bent piece to the initial state. It is.

  In the present invention, it is preferable that the front end surfaces of the annular protrusions are inclined forward from the rod body. In the present invention, the rear end surfaces of the annular protrusions can be inclined forward from the rod body.

  In the present invention, it is preferable to form a gap between the piston and the plunger rod.

  In the present invention, the elastic base and the syringe can be configured separately.

  In the present invention, the spray nozzle can be provided in the syringe.

  According to the present invention, when the plunger rod is pushed into the syringe, the front side extension of the bent piece is pushed open by the annular protrusion, thereby allowing the plunger rod to be pushed in and ejecting the contents. The amount of ejection is limited by the fact that the rear extension of the bent piece tilts toward the rod body and contacts another annular protrusion that advances from the rear. In addition, since the bent piece tilts, when the plunger rod is released, the bent piece is returned to the initial state by pushing back the plunger rod through the annular projection by the restoring force accompanying the tilt of the bent piece. Thereby, the content can be newly ejected by pushing the plunger rod again.

  Therefore, according to the present invention, the content filled in one syringe can be subdivided and taken out by the axial interval of the plurality of annular protrusions provided on the plunger rod. In addition, in the present invention, it is possible to perform a new ejection simply by releasing the pushing of the plunger rod, and therefore it is not necessary to change it for each ejection operation. For this reason, the user can perform a plurality of subdivision operations by one-hand operation. Furthermore, according to the present invention, the contents can be taken out by a simple mechanism without increasing the number of parts.

It is sectional drawing which shows the initial state of the fixed_quantity | quantitative_type nasal spray sprayer which is one Embodiment of this invention, and its enlarged view. It is sectional drawing which shows the state in which the squirt nasal spray device is pushed in and the 1st ejection is performed, and the enlarged view. It is sectional drawing and the enlarged view which show the state which pushed in and operated the same point nasal spray sprayer, and the 1st ejection was completed. It is sectional drawing which shows the state which cancels | releases pushing operation of a tie nasal spray sprayer and can perform the 2nd ejection. (A) is a top view which shows the adapter which concerns on a tie nasal spray device, (b) is XX sectional drawing of Fig.4 (a), (c) is a bottom view which shows an adapter. .

  Hereinafter, with reference to the drawings, a quantitative type nasal spray sprayer which is an embodiment of the present invention will be described in detail.

  In FIG. 1, the code | symbol 10 is a nasal spray sprayer which is one Embodiment of this invention. The nasal spray device 10 has a metering syringe 11 made of synthetic resin or glass. The syringe 11 has a hollow body 11a that can be filled with contents (nasal drops) M, and a distal end 11c is integrally connected to the body 11a via a shoulder 11b. The tip portion 11c has a smaller diameter than the body portion 11a. An internal passage r is formed inside the distal end portion 11c.

  Reference numeral 12 denotes a spray nozzle that can be attached to and detached from the syringe 11. The spray nozzle 12 has a main body 12a that is detachably fitted to the distal end portion 11c. A nozzle chip 12b is built in the main body 12a. Further, an ejection hole 10a communicating with the nozzle tip 12b is formed at the tip of the main body 12a. Thereby, the spray nozzle 12 can spray the content M to the outside through the ejection hole 10a.

In addition, the rear end portion of the syringe 11 is provided with an opening (hereinafter referred to as “rear end opening portion”) A ₁ that allows the inside of the syringe 11 to communicate with the outside, together with a finger hook portion 11 d that protrudes outward.

Reference numeral 13 is a piston (gasket) 13 is disposed in the syringe 11 through the rear end opening A _1. The piston 13 is slidably held inside the body portion 11a. The piston 13 is made of an elastic material such as rubber, for example. Thus, a filling space S ₁ for sealing and holding the contents M filled in the syringe 11 is formed between the nozzle 12 and the piston 13.

  Reference numeral 14 denotes a plunger rod. The plunger rod 14 has a hollow shaft-shaped rod body 14a. In the present embodiment, an annular receiving portion 14 b that receives the piston 12 is provided on the distal end side of the plunger rod 14. The receiving portion 14b is provided with a tip portion 14c. The piston 13 can be screwed to the distal end portion 14c. Moreover, the front-end | tip part 14c is attached so that the clearance gap (play) C may be formed between the receiving part 14b and the piston 13. As shown in FIG. Further, a disc-shaped pressing portion 14 d is provided at the rear end portion of the plunger rod 14. The pressing portion 14d allows the plunger rod 14 to be pushed in by receiving a force from the user.

The rod body 14a is further provided with a plurality of annular protrusions 14p that go around the central axis (hereinafter referred to as “axis”) O of the nasal spray sprayer 10. For example, in the present embodiment, the annular protrusions 14p are provided at five locations at intervals along the axis O. However, the number of the annular protrusions 14p is not limited to five as long as it is plural. Further, as shown in the enlarged view of FIG. 1, each of the annular protrusions 14p is provided in a conical shape that is inclined forward from the rod body 14a. As a result, the front end face F ₁ and the rear end face F ₂ of the annular protrusion 14p are inclined forward from the rod body 14a, as shown in FIG.

Reference numeral 20 denotes a stopper cover that cooperates with the plunger rod 14. The stopper cover 20 has a holder 21 that houses the finger hook portion 11d. As shown in FIG. 5A, the holder 21 has an opening A ₂ that houses the body 11 a of the syringe 11. Further, as shown in FIG. 5B, a storage space S ₂ that opens to the opening A ₂ side and stores the finger hook portion 11 d is formed on the side surface of the holder 21. Further, a support plate 22 is integrally provided at the lower end of the holder 21 at a position opposing the axis O.

  Further, a bent piece 24 is integrally provided on the support plate 22 via an elastic base 23. The bent piece 24 is formed of a front side extension 24a inclined toward the axis O and a rear side extension 24b extending from the front extension 24a. As shown in FIG. 5C, the front side extension 24 a and the rear side extension 24 b are each formed in a flat plate shape together with the elastic base 23. The elastic base portion 23 is integrally connected to the outside of the bent portion of the bent piece 24 and has rigidity capable of deformation and restoration. Thereby, the bending piece 24 can be tilted so that it can be restored in the vertical direction with the elastic base 23 as a base point inside the support plate 22.

Furthermore, as shown in FIG.5 (b), the stopper 25 is integrally provided in the front side extension part 24a. The stopper 25 is disposed outside the front extension 24a. In the present embodiment, the stopper 25 is formed in a flat plate shape that rises from the outer surface of the front extension 24 as shown in FIG. The stopper 25 forms an end face (hereinafter referred to as “front end face”) 24e ₁ that is the same as the end of the front extension 24a.

The front extension 24a is set to be inclined toward the rod body 14a so that the width between them is narrower than the annular protrusion 14p in the initial state shown in FIG. The width between each other rear square side extension 24 b in the initial state shown in FIG. 1, is set to be wider than the annular projection 14p.

  Next, the usage method of the nasal spray sprayer 10 is demonstrated.

  In the state shown in FIG. 1, the user first puts his / her index finger and middle finger on the holder 21 (finger holding portion 11d) and presses the pressing portion 14b with the thumb. Next, after the spray nozzle 12 is inserted into one nostril hole, the plunger rod 14 is pushed in via the pressing portion 14b as shown by the arrow (1).

Then, as shown by an arrow (2) in FIG. 2, the annular protrusion 14p pushes and opens the front side extension 24a of the bent piece 24, thereby allowing the plunger rod 14 to be pushed. As shown by the arrow (3), the bent piece 24 is restricted by tilting toward the rod main body 14 with the elastic base 23 as a base point. That is, as the bent piece 24 tilts, the front end surface 24e ₁ of the front extension 24a contacts the rear end (hereinafter referred to as “syringe rear end”) 11e of the syringe 11 as shown in FIG. The movement of the extension 24a is restricted, and the end surface (hereinafter referred to as “rear end surface”) 24e _{2 of} the rear side extension 24b is restricted by coming into contact with the front end surface F ₁ of the other annular protrusion 14p that proceeds from the rear. Is done. As a result, the amount by which the plunger rod 14 can be pushed in at a time is limited to the axial distance between the two annular protrusions 14p.

In addition, when the pushing of the plunger rod 14 is continued, the bent piece 24 receives the pushing force of the plunger rod 14 from the rear end face 24e ₂ via the annular protrusion 14p as shown by the arrow (4) in FIG. In the present embodiment, in the bent piece 24, the rear side extension 24b is tilted with respect to the front side extension 24a, whereby in addition to the deformation of the elastic base 23, the interior as shown by the arrow (5) in FIG. Stress is generated. For this reason, when the pushing of the plunger rod 14 is released, as shown by the arrow (6) in FIG. 4, the plunger rod 14 is tilted and compressed by the restoring force accompanying the deformation generated in the elastic base 23 and the bent piece 24. The bent piece 24 thus restored returns to the initial state shown in FIG. That is, by the restoring force of the elastic base 23 and bent piece 24, by the rear end surface 24e ₂ of the rear extension portion 24b pushes back the annular projection 14p along the front end surface F ₁ of the annular projection 14p, pushed back even entire plunger rod 14 It is. As a result, the rear extension 24b of the bent piece 24 enables the plunger rod 14 to be pushed in without interfering with the annular protrusion 14p, as shown in FIG.

  Therefore, if the user releases the pushing of the plunger rod 14 and inserts the spray nozzle 12 into the other nostril, and then pushes the plunger rod 14 again, the axial length between the two annular protrusions 14p is the same. As a result, the contents M can be newly ejected. That is, if the series of operations in FIGS. 1 to 4 is repeated, the content liquid in the syringe 11 can be quantitatively ejected.

  As described above, according to the nasal spray sprayer 10 according to the present invention, the content M filled in one syringe 11 is subdivided by the amount corresponding to the number of the annular protrusions 14p provided on the plunger rod 14 and taken out. be able to. Moreover, in the nasal spray nebulizer 10 according to the present invention, it is possible to perform a new ejection simply by releasing the pushing of the plunger rod 14, so that it is not necessary to change it for each ejection operation. For this reason, the user can perform a plurality of subdivision operations by one-hand operation. Furthermore, according to the nasal spray sprayer 10 according to the present invention, the contents can be subdivided and taken out with a simple mechanism without increasing the number of parts.

According to the present invention, the stopper 25 provided on the front side extension 24a is effective for increasing the internal stress accompanying the pushing of the plunger rod 14, but according to the present invention, the end surface of the front side extension 24a. by increasing the thickness of the 24e _1, it can be omitted.

Further, when the front end face F ₁ of the annular protrusion 14p is inclined forward from the rod main body 14a as in the present embodiment, the rear end face 24e ₂ of the rear side extension 24b is formed when the plunger rod 14 is pushed in. while it is possible to increase the internal stress of the elastic base 23 is easily caught by the front end surface F ₁ of the annular projection 14p, when releasing the depression of the plunger rod 14 has an annular projection at the rear end surface 24e ₂ of the rear side extension portion 24b While pushing back 14p, the rear side extension 24b can be easily separated from the annular protrusion 14p. Incidentally, according to the present invention, by forming a groove on the front end surface F _1, it is also possible to guide the front end surface 24e ₁ along the groove.

Further, as shown in FIG. 4, when the rear end face F ₂ of the annular protrusion 14p is inclined forward from the rod body 14a as in the present embodiment, the bent piece 24 is returned to the initial position. The front end surface 24e ₁ of the front side extension 24a can be made to coincide with the rear end surface F ₂ .

Furthermore, if a gap C is formed between the piston 13 and the plunger rod 14 as in this embodiment, even if the piston 13 is difficult to move due to the negative pressure in the filling space S ₁ , only this gap C is provided. The plunger rod 14 can be pushed back. Thereby, even if the piston 13 is difficult to move in the syringe 11, the second and subsequent ejection operations can be reliably performed.

  Moreover, in this embodiment, the syringe 11 and the elastic base 23 are made into a different body by providing the stopper cover 20 with the bending piece 24 connected to the elastic base 23. In this case, versatility is enhanced by using the existing syringe 11.

  The above are various embodiments of the present invention, but various modifications are possible according to the present invention. For example, in the above-described embodiment, a syringe type sprayer has been described. However, according to the present invention, by changing the nozzle 12, various contents can be used such as jetting as foam or jetting as a normal liquid. Can be ejected in various forms. Further, the contents can be directly ejected from the internal passage r without attaching the nozzle 12.

  If it is a fixed quantity syringe type ejector provided with the syringe which has a finger hook part, and the plunger which can be pushed in in the said syringe, it can employ | adopt as a thing of various forms. Various contents can be adopted for the contents without being limited to nasal drops.

10 Nasal spray sprayer (quantitative syringe type sprayer)
10a jet 11 syringe 11a body 11b shoulder 11c tip 11d finger hook 12 spray nozzle 13 piston 14 plunger rod 14a rod body 14b receiving part 14c tip 14d pressing part 14p annular projection 20 stopper cover 21 holder 22 support plate 23 support plate 23 base 24 bent pieces 24a front side extension portion 24b rearward extension 24e ₁ front end surface 24e ₂ rear facet 25 stopper C clearance F ₁ front face F ₂ rear surface

Claims (7)

A syringe having a finger hook, a piston that is arranged inside the syringe to form a filling space for contents, and a plunger rod that pushes the piston forward;
The plunger rod has a plurality of annular protrusions arranged at intervals along the rod body,
The syringe has a bent piece that can be tilted around an elastic base that can be deformed and restored,
The bent piece is formed of a front side extension part inclined toward the rod body and a rear side extension part,
When the front side extension part pushes in the plunger rod, the rear side extension part is tilted toward the rod main body side by being pushed open by the annular protrusion,
The extension on the rear side comes into contact with other annular protrusions arranged rearward as the bent piece tilts, and the annular protrusion is pushed back by releasing the plunger rod to return the bent piece to the initial state. This is a quantitative syringe type ejector. In Claim 1, the syringe has a pair of the bent pieces facing each other,
Each of the bent pieces is formed of the front side extension and the rear side extension,
Each of the pair of front side extensions has a stopper, and has a stopper.   3. The metering syringe type ejector according to claim 1, wherein the front end surface of the annular protrusion is inclined forward from the rod body.   The metering syringe ejector according to any one of claims 1 to 3, wherein the rear end surfaces of the annular protrusions are inclined forward from the rod body.   The metering syringe type ejector according to any one of claims 1 to 4, wherein a gap is formed between the piston and the plunger rod.   6. The quantitative syringe type ejector according to any one of claims 1 to 5, wherein the syringe and the elastic base are configured separately.   7. The quantitative syringe type ejector according to claim 1, wherein a spray nozzle is provided in the syringe.

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