JP5868782B2 - Metered syringe type ejector - Google Patents

Description

  The present invention relates to a quantitative syringe-type ejector including a syringe having a finger hook and a plunger that can be pushed into the syringe, and relates to a technique for pushing the plunger in stages.

  Some syringe-type ejectors, for example, push a plunger into a syringe and take out contents such as a chemical solution (see, for example, Patent Document 1).

JP 7-213612 A

  However, since the conventional syringe-type ejector only pushes the plunger into the syringe, it is difficult to divide the contents into small portions and eject them.

  An object of the present invention is to provide a novel metering syringe type ejector that can divide the contents and eject them.

The present invention is a metering syringe type ejector comprising a syringe having a finger-holding portion and a plunger that can be pushed into the syringe, the plunger having a piston holding member having a piston at the tip, and a rear of the piston holding member. A plunger operating member that is disposed at the end and operated by a user, and the piston holding member includes a holding body that holds the piston, and a shaft that extends integrally toward the rear on the holding body. A plurality of arms that can be deformed and restored and arranged at positions facing each other across the shaft are integrally provided, and enter the arm from the rear end opening of the syringe, and the inner peripheral surface of the syringe and sliding protrusion slidably the locking projections provided to be locked to the rear end of the syringe so as to stop the pushing of the plunger in the syringe The plunger operating member is formed with a notch for operably storing the arm together with the internal space for storing the shaft in the plunger operating member, and the abutting end portion of the notch is used as the free end of the arm. Is formed on the pressing surface that causes the bending deformation starting from the sliding protrusion by restraining the arm with the syringe, and the plunger operating member is bent and deformed by releasing the pressing. By being pushed back by the restoring force starting from , the locking projection is released so that the plunger can be pushed again .

A plunger operating member and the shaft may be provided with a locking portion for retaining hold leaves the shaft flop plunger operating member together when enabling push-back of the plunger operating member.

  In addition, a step can be provided at the free end of the arm, the bottom surface of the step can be formed on the pressure receiving surface from the plunger operating member, and the side surface of the step can be formed as a tapered surface. Further, a tapered surface can be formed at the abutting end. Furthermore, according to this invention, the spray nozzle can be provided in the front-end | tip part of a syringe.

  In the present invention, when the plunger operating member is pushed in, the sliding protrusion provided on the arm extending from the piston holding member enters from the rear end opening of the syringe and slides on the inner peripheral surface of the syringe. When the movement of the end is constrained between the syringe and the syringe, the arm is bent and deformed starting from the sliding protrusion. For this reason, the plunger can be ejected for the first time until the sliding protrusion is pushed in without being obstructed until the locking protrusion provided on the arm is locked to the rear end of the syringe.

  Next, when the pushing of the plunger operating member is loosened, the free end side of the arm restores from the sliding projection to the starting point by the restoring force starting from the bending deformation sliding projection. At this time, the fixed end side of the arm remains deformed inward from the sliding projection, so that the free end side of the arm is aligned with the fixed end side deformed inward from the sliding projection. Restore diagonally inward. For this reason, the latching protrusion is also released obliquely inward so as to follow the free end side of the arm, whereby the latching of the latching protrusion is released. Thereby, if the plunger is pushed in again, the second ejection becomes possible.

  Therefore, according to the present invention, the contents can be taken out in small portions. Further, in the present invention, since the second ejection can be performed only by loosening the pushing of the plunger operation member, it is not necessary to hold it when performing the second ejection. For this reason, the user can perform subdivision of the contents with one-hand operation.

  In addition, according to the present invention, since the notch for operably storing the arm together with the internal space for storing the shaft is formed in the plunger operating member, the looseness caused by assembling the piston holding member and the plunger operating member is reduced. be able to. Therefore, according to the present invention, the contents can be subdivided and ejected while maintaining a good operation.

BRIEF DESCRIPTION OF THE DRAWINGS It is a nasal spray sprayer which is 1st embodiment of this invention, Comprising: The one side view which shows the initial state before the operation in a partial cross section, and its partial enlarged view. It is another side view which shows the initial state before operation of the embodiment in a partial cross section. FIG. 4 is an exploded perspective view schematically showing a part of a piston holding member and a plunger operating member in the same embodiment. In this embodiment, (a) is an enlarged cross-sectional view showing a state in which the plunger is pushed in and the first spray is started, and (b) is an enlarged cross-sectional view showing a state in which the first spray is completed. (C) is an expanded sectional view which shows the state which loosened pushing of the plunger in order to start the 2nd spraying. It is sectional drawing which shows the state in which spraying was made | formed in the same embodiment.

  Hereinafter, with reference to drawings, nasal spray sprayer 10 which is one embodiment of the present invention is explained in detail.

  In FIG. 1, the code | symbol 20 is a synthetic resin metering syringe which can be filled with the nasal spray C as a content. The syringe 20 has a hollow body portion 21, and a distal end portion 23 is integrally connected to the body portion 21 via a shoulder portion 22. The tip portion 23 has a smaller diameter than the body portion 21. In addition, the body 21 is provided with a finger hook 24 separately at the rear end facing the front end 23. The finger hook 24 is formed with an opening A2 that allows the inside of the syringe 20 to communicate with the outside. Thereby, the rear end of the finger hook portion 24 constitutes the rear end 20 e of the syringe 20. In addition, the finger hook portion 24 can be provided integrally with the trunk portion 21.

  Reference numeral 30 denotes a synthetic resin plunger housed in the syringe 20. The plunger 30 includes a piston holding member 40 and a plunger operating member 50 disposed behind the piston holding member 40.

  The piston holding member 40 includes a holding body 41 that holds the piston P. The holding part main body 41 is integrally formed with four vertically long plate parts 41a and a disk part 41b. The piston P is provided at the distal end portion of the holding portion main body 41 and is accommodated in the syringe 20. The piston P is made of an elastic material such as rubber, for example, and is slidably held on the inner peripheral surface 21f of the syringe barrel 21.

  A space R1 is formed between the syringe 20 and the piston P. The nasal spray C is filled in the space R1. The nasal spray C filled in the space R1 is pumped into the through hole A1 formed in the distal end portion 23 by pushing the piston P.

  In addition, the holding portion main body 41 is integrally provided with a shaft 42. The shaft 42 has a shaft body 42a having a smaller diameter than the disk portion 41b. The shaft body 42a extends rearward along the axis O from the disk portion 41b. A head 42b having a larger diameter than that of the shaft main body 42a is integrally provided at the tip of the shaft main body 42a. As shown in FIG. 3, the head 42 b has an inclined surface 42 f that tapers toward the tip.

  Further, the holding portion main body 41 is integrally provided with two arms 43. The arm 43 is disposed at a position that faces the shaft 42a. Each of the arms 43 has a flat plate shape and extends rearward along the axis O from the disk portion 41b. Each of the arms 43 can be deformed by applying an external force, and can be restored to the initial position by releasing the load.

  The arm 43 is integrally provided with a sliding projection 44. The sliding protrusion 44 has an inclined surface 44f that inclines toward the fixed end 43a. Thereby, the sliding protrusion 44 can be easily entered into the syringe 20 from the opening A2. Further, the arm 43 is integrally provided with a locking projection 45. The locking protrusion 45 is provided at a distance from the sliding protrusion 44 toward the rear. In this embodiment, the locking projection 45 is formed integrally with a portion of the arm on the free end 43e side. Thereby, in this embodiment, the rear end surface of the locking projection 45 is configured as a free end 43 e of the arm 43.

  In this embodiment, the free end 43e of the arm is tapered to decrease outward at an angle θ with respect to a horizontal line orthogonal to the axis O, as shown in the enlarged view of FIG. The value of θ can be appropriately changed according to the size of the nasal spray ejector.

  In addition, in this embodiment, a step 46 is provided on the locking projection 45. The step 46 is formed on the inner surface side of the arm 43. In this embodiment, as shown in the enlarged view of FIG. 1, the step 46 is formed by a flat step bottom surface 46a and a step side surface 46b connected to the bottom surface 46a. In this embodiment, the step side surface 46b is formed as a tapered surface inclined outward.

  On the other hand, the plunger operation member 50 has an operation part main body 51, and a plunger operation part 52 for a user to push the plunger 30 is integrally provided at the rear end thereof. As shown in FIG. 3, the operation portion main body 51 has a cylindrical shape. Inside the plunger operating member 50, an internal space R2 penetrating between the front end 50a and the rear end 50b is formed. The inner space R <b> 2 accommodates the shaft 42, thereby restricting the movement (backlash) around the axis O of the shaft 42.

  An annular protrusion 53 is interposed in the internal space R2. The annular protrusion 53 protrudes from the inside of the operation portion main body 51, and forms an opening A3 having a smaller diameter than the internal space R2 inside. The opening A3 has an inner diameter that is larger than the shaft main body 42a and smaller than the head 42b. As shown in FIG. 1, the opening A3 penetrates the shaft main body 42a and holds the head 42b. The head 42 b and the annular protrusion 53 function as a locking portion that holds the piston holding member 40 against the plunger operating member 50. In particular, in this embodiment, the inner peripheral surface 53f of the annular protrusion 53 is configured by a tapered surface that decreases in diameter toward the rear. Thereby, the head 42 b can be easily assembled to the upper end of the annular protrusion 53. Further, the annular protrusion 53 is interposed in the internal space R2, so that the play space S in which the head 42b can be moved back and forth along the axis O in the internal space R2 on the rear end side of the annular protrusion 53 is provided. Form. Thereby, the piston holding member 40 and the plunger operating member 50 can be connected to each other so as to be movable along the axis O.

  The operation portion main body 51 is formed with a plurality of notches 54 that communicate with the internal space R2. As shown in FIG. 2, the notch 54 operably houses the arm 43 together with the shaft 42, thereby restricting the movement of the arm 43 to substantially only the movement along the radial direction. As shown in the enlarged view of FIG. 1, the abutting end portion 55 of the notch 54 is formed by a flat abutting tip surface 55a and a butting side surface 55b connected to the abutting tip surface 55a. In this embodiment, the abutting front end surface 55 a is formed as a pressing surface that presses the step bottom surface 46 a of the piston holding member 40. The abutting front end surface 55a presses the plunger operating member 50, thereby pressing the step bottom surface 46a of the piston holding member 40 and causing the plunger 30 as a whole to be pressed. The abutting side surface 55b is formed as a tapered surface that tapers toward the abutting tip surface 55a. In this embodiment, the abutting side surface 55b is a tapered surface having an angle substantially equal to that of the step side surface 46b, and a gap G is formed between them.

  In FIG. 1, reference numeral 60 is a nozzle attached to the syringe tip 23. The nozzle 60 incorporates the spray tip 61 and can eject the nasal spray C pumped through the through hole A1 from the ejection hole A4.

Here, the usage method of this embodiment is demonstrated.
In the state shown in FIG. 1, the user first places the index finger and the middle finger on the finger-hanging portion 24, presses the plunger operating portion 52 with the thumb and inserts the nozzle 60 into one of the nostrils, and then pushes in the plunger operating member 50. . Then, as shown in the enlarged view, in the abutting end portion 55 of the plunger operating member 50, the abutting tip surface 55 a presses the step bottom surface 46 a of the piston holding member 40, so that the piston holding member 40 and the plunger operating member 50 together. Pushed in. At this time, the sliding projection 44 of the plunger operating member 50 has an inclined surface 44f that tapers toward the tip, and therefore, as shown in FIG. Can enter.

  Further, the piston holding member 40 has a contact end surface 55a of the plunger operating member 50 that contacts and presses the step bottom surface 46a of the arm 43, and the sliding projection 44 of the arm 43 contacts the inner peripheral surface 21f of the syringe. The movement of the arm on the free end 43e side is restrained between the syringe 20 and the arm 20. As a result, as shown in FIG. 4B, the arm 43 undergoes bending deformation starting from the sliding protrusion 44, and the sliding protrusion 44 slides on the inner peripheral surface 21f of the syringe. Therefore, it is possible to allow the plunger 30 to be pushed. As a result, as shown in the figure, a predetermined amount of nasal spray C can be ejected from the ejection hole A4 into the nostril until the locking projection 45 provided on the arm 43 contacts the rear end 20e of the syringe.

  When the locking projection 45 comes into contact with the rear end 20e of the syringe 20, the plunger 30 cannot be pushed in, so the first ejection ends with the nasal spray C remaining in the space R1. The capacity of the space R1 at this time can be appropriately selected according to the purpose of use, but is, for example, half the capacity of the space R1 before the ejection starts.

  Next, when the pushing of the plunger operating member 50 is loosened, as shown in FIG. 4C, the free end 43e side of the arm is restored from the sliding projection 44 as a starting point by the restoring force of the bending deformation. At this time, the fixed end 43a side of the arm remains deformed inward starting from the sliding projection 44, so the free end 43e side of the arm is inward starting from the sliding projection 44 as shown in FIG. Restoring diagonally inward so as to align with the deformed fixed end 43a side. For this reason, the locking projection 45 is also displaced obliquely inward so as to follow the free end 43e side of the arm, whereby the locking state of the locking projection 45 is released as shown in FIG.

  In particular, in the present embodiment, as explained in the enlarged view of FIG. 1, when the plunger operating member 50 is pushed in, the abutting side surface 55b is regulated by the step side surface 46b, so that the piston holding member 40 is effectively Can be pushed in. When the pushing of the plunger operating member 50 is released, the abutting side surface 55b moves to guide the stepped side surface 46b. Therefore, the free end 43e side of the arm easily escapes while pushing back the plunger operating member 50. The deformation can be easily restored.

  As a result, after the plunger operation member 50 is released, the second operation can be performed by pushing the plunger operation member 50 again. In this embodiment, if the plunger operation member 50 is pushed in again after the plunger operation member 50 is pushed back, the plunger operation member 50 can be brought into contact with the locking protrusion 45 as shown in FIG. For this reason, the piston 43 can be pushed in by the arm 43 restoring the sliding projection 44 as a starting point.

  In particular, in this embodiment, since the free end 43e of the arm is tapered, even when the free end 43e side of the arm is restored from the sliding protrusion 44, the plunger operating member 50 is in a state close to being parallel to the leading end surface 55a. Therefore, the piston holding member 40 can be pushed in smoothly.

  Therefore, as shown in FIG. 4C, after the plunger operating member 50 is released and the plunger operating member 50 is pushed back, the nozzle 60 is inserted into the other nostril and the plunger operating member 50 is pushed in. For example, as shown in FIG. 5, the nasal spray C remaining in the space R1 can be ejected from the ejection hole A4 into the nostril.

  As described above, according to this embodiment, the nasal spray C can be subdivided and ejected. In the present embodiment, if the plunger operation member 50 is loosely pressed, the second ejection can be performed, so that it is not necessary to hold it when performing the second ejection. For this reason, the user can perform subdivision of the contents with one-hand operation.

  In addition, in the present embodiment, the plunger operating member 50 is formed with the notch 54 that operably accommodates the arm 43 together with the internal space R2 that accommodates the shaft 42. The looseness caused by the assembly can be reduced. Therefore, according to the present embodiment, the contents can be subdivided and ejected while maintaining a good operation.

  The above are various embodiments of the present invention, but various modifications are possible according to the present invention. For example, two or more arms 43 and notches 54 can be provided. In particular, as in the present embodiment, when an even number is arranged, the balance around the axis O is stabilized, so that a favorable operation can be realized. In the above-described embodiment, the syringe-type ejector has been described as a nebulizer. However, according to the present invention, the contents can be ejected in various forms, such as being ejected as bubbles or ejected as normal liquid. .

  The present invention can be adopted in various forms as long as it is a syringe type ejector provided with a syringe having a flange portion and a plunger that can be pushed into the syringe. Various contents can be adopted without being limited to nasal drops.

10 nasal spray sprayer (syringe type sprayer)
20 Syringe 21 Body 22 Shoulder 23 Tip 24 Finger Hook 30 Plunger 40 Piston Holding Member 41 Holding Main Body 42 Shaft 42a Shaft Main Body 42b Head 43 Arm 43a Arm Fixed End 43b Arm Free End 44 Sliding Projection 44f Inclined Surface 45 Stop projection 46 Step 46a Step bottom 46b Step side 50 Plunger operation member 51 Operation part main body 52 Plunger operation part 53 Annular projection 54 Notch 55 Butting end 55a Butting tip 55b Butting side 60 Nozzle 60 Spray tip A1 Through hole A2 After syringe End opening A3 Opening A4 Nozzle ejection hole C Nasal spray (contents)
D Step (Free end)
G Gap R1 Filling space R2 Filling space S Play space

Claims (5)

A metering syringe type ejector comprising a syringe having a finger hook and a plunger that can be pushed into the syringe,
The plunger has a piston holding member having a piston at the tip, and a plunger operating member that is arranged at the rear end of the piston holding member and is operated by the user.
The piston holding member includes a holding portion main body that holds the piston, and a plurality of shafts that extend integrally with the holding portion main body toward the rear, and a plurality of deformations and restorations that are disposed at positions facing each other across the shaft. The arm is integrally provided, the sliding protrusion that can enter the arm from the rear end opening of the syringe and slide on the inner peripheral surface of the syringe, and the pushing of the plunger into the syringe are stopped. It is provided with a locking projection that is locked to the rear end of the syringe,
The plunger operating member is formed with a notch for operably storing the arm together with the internal space for storing the shaft in the plunger operating member, and the free end of the arm is pressed against the abutting end of the notch. Is formed on the pressing surface that causes bending deformation starting from the sliding protrusion by restraining the syringe with the syringe, and the plunger operating member starts with the sliding protrusion of the bending deformation when the pressing is released The fixed-quantity syringe type ejector that releases the locking projection so as to enable the plunger to be pushed again by being pushed back. In claim 1, the plunger operating member and the shaft, the metering syringe type ejection, characterized in that a locking unit for stopping holding leaves the shaft together Enabling push-back of the plunger operating member flop plunger operating member vessel.   3. The quantitative determination according to claim 1, wherein a step is provided at a free end of the arm, a bottom surface of the step is formed on a pressure receiving surface from the plunger operating member, and a side surface of the step is formed on a tapered surface. Syringe type ejector.   The metering syringe type ejector according to any one of claims 1 to 3, wherein a tapered surface is formed at an abutting end portion.   The metering syringe type ejector according to any one of claims 1 to 4, wherein a spray nozzle is provided at a tip portion of the syringe.

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