Syringe type discharge container

Abstract

To provide a syringe type discharge container capable of discharging content fluid subdivided in a predetermined quantity a plurality of times with a simple configuration.SOLUTION: A syringe type discharge container 1 includes: a syringe 10; a piston 20; an operation rod 30 equipped with a spiral groove 35 on the outer peripheral surface, at one end of which the piston 20 is attached so as to relatively move in an axial direction; an elastic body 40 provided between the operation rod 30 and the piston 20; a convex part 13d provided in a finger grip 13, and arranged inside the spiral groove 35; a plurality of protrusions 36 provided on a first lateral surface 35a of the spiral groove 35, each having an engagement surface 36a and a first guide surface 36b; and a plurality of concave parts 37 provided on a second lateral surface 35b of the spiral groove 35, each having a second guide surface 37a arranged deviated to one end side of the spiral groove 35 with respect to a corresponding engagement surface 36a, and extending up to a position opposed to the first guide surface 36b.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a syringe-type dispensing container. [Background technology]

[0002] For example, a container for storing a liquid content that has a set dosage and that needs to be administered in fixed amounts over multiple doses is known which has a syringe with an outlet at one end and a finger grip at the other end, a piston attached to the tip of a control rod and positioned inside the syringe, and a plurality of elastically deformable arms provided on the control rod, each arm having a sliding protrusion and a locking protrusion, such that when the control rod is pushed towards the syringe, the locking protrusions lock the control rod to the syringe at each predetermined amount of pushing, allowing the content liquid to be dispensed in small portions at a fixed amount over multiple doses (for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2021-36975 Summary of the Invention [Problem to be solved by the invention]

[0004] However, the conventional syringe-type dispensing container described in Patent Document 1 had a complex configuration, for example, requiring an elastically deformable arm equipped with a sliding protrusion and a locking protrusion to be attached to the operating rod, and in this respect there was room for improvement.

[0005] The present invention has been made in consideration of such problems, and its object is to provide a syringe-type dispensing container that has a simple configuration and is capable of dispensing the content liquid in small portions in multiple batches of predetermined amounts. [Means for solving the problem]

[0006] The syringe-type discharge container of the present invention comprises a syringe having a discharge port at one end and a finger grip at the other end, a piston attached inside the syringe so as to be movable along the axial direction, an operating rod having a spiral groove on its outer circumferential surface and the piston attached to one end so as to be movable relative to the operating rod in the axial direction, an elastic body provided between the operating rod and the piston and biasing the operating rod toward the opposite side to the discharge port relative to the piston, a convex portion provided on the finger grip and movably disposed inside the spiral groove along the spiral groove, and a first side surface of the spiral groove facing the discharge port, the screw is attached to the first side surface of the spiral groove, and the screw is attached to the first side surface of the spiral groove, ... The present invention is characterized in that it has a plurality of protrusions arranged at predetermined intervals in a direction along the spiral groove, each extending from the first side surface toward the discharge port and having a locking surface facing one end of the spiral groove and a first guide surface facing the other end of the spiral groove and inclined with respect to the axial direction of the operating rod, and a plurality of recesses each arranged on a second side surface facing the opposite side to the first side surface of the spiral groove, each shifted toward one end of the spiral groove more than the corresponding locking surface, each having a second guide surface inclined with respect to the axial direction of the operating rod, and extending to a position opposite the first guide surface.

[0007] In the syringe-type dispensing container of the present invention having the above-mentioned configuration, it is preferable that the piston and the elastic body are integrally formed from a synthetic resin material.

[0008] In the syringe-type dispensing container of the present invention having the above-mentioned configuration, it is preferable that the syringe is provided with an attachment tube portion to which a cap for closing the discharge port or a nozzle body connected to the discharge port can be detachably attached.

[0009] In the syringe-type dispensing container of the present invention having the above-mentioned configuration, it is preferable that an operating piece having a diameter larger than that of the operating rod is rotatably attached to the other end of the operating rod. Effect of the Invention

[0010] According to the present invention, it is possible to provide a syringe-type dispensing container that can dispense a predetermined amount of liquid content in a plurality of small portions with a simple configuration. [Brief description of the drawings]

[0011] [Figure 1] 1 is a cross-sectional view of a syringe-type dispensing container according to an embodiment of the present invention as viewed from the front (a part of an operating rod is shown in the front view). [Diagram 2] 2 is a cross-sectional view taken along line AA of the syringe-type dispensing container shown in FIG. 1. [Diagram 3] 2A is a plan view of the piston shown in FIG. 1, FIG. 2B is a half cross-sectional view of the piston shown in FIG. 1 as seen from the front, and FIG. 2C is a side view of the piston shown in FIG. [Figure 4] 10 is an explanatory diagram showing details of a protrusion and a recess and a protrusion provided in a spiral groove. FIG. [Diagram 5] 1 is a cross-sectional front view of a portion of a syringe-type discharge container with a nozzle body attached to a mounting tube portion. FIG. [Figure 6] (a) is an explanatory diagram showing the movement of the convex portion in the spiral groove when the pushing operation of the operating rod is started, (b) is an explanatory diagram showing the movement of the convex portion in the spiral groove when the pushing operation of the operating rod is completed, and (c) is an explanatory diagram showing the movement of the convex portion in the spiral groove when the pushing operation of the operating rod is released. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] The syringe-type dispensing container of the present invention will now be described in more detail with reference to the drawings.

[0013] A syringe-type dispensing container 1 according to an embodiment of the present invention shown in Fig. 1 can be used to store liquid such as a plant nutrient or insect repellent, which has a set dosage and needs to be administered in fixed amounts multiple times, as the content liquid 2. The content liquid 2 stored in the syringe-type dispensing container 1 is not limited to the above, and may be various other liquids.

[0014] As shown in FIG. 1, the syringe-type dispensing container 1 includes a syringe 10, a piston 20, and an operating rod 30.

[0015] In this embodiment, the syringe 10 is of an assembled type and has a syringe body 11, a nozzle cap 12, and a finger grip 13.

[0016] In this specification and claims, the side where the nozzle cap 12 is attached to the syringe body 11 (the lower side in FIG. 1) is defined as one end, and the side where the finger grip 13 is attached to the syringe body 11 (the upper side in FIG. 1) is defined as the other end. Also, the direction along the axis O of the syringe 10 is defined as the axial direction.

[0017] The syringe body 11 is made of synthetic resin and has a cylindrical shape, and a mounting flange 11a is integrally provided at the other end of the syringe body 11. The syringe body 11 may be made of glass.

[0018] Nozzle cap 12 is made of synthetic resin material and formed into a cylindrical shape with a bottom, and is fitted and fixed from the outside to one end of syringe body 11. Nozzle cap 12 has nozzle portion 12a formed into a cylindrical shape with a smaller diameter than syringe body 11, and the tip (one end) of nozzle portion 12a serves as discharge port 12b for content liquid 2 that communicates with storage space S of syringe body 11. That is, syringe 10 has discharge port 12b at one end.

[0019] The finger grip 13 includes a finger hook 13a formed in a plate shape from a synthetic resin material, and a pressing plate 13b disposed on the other end of the finger hook 13a. As shown in Fig. 2, the finger hook 13a is provided with a notch 13c that opens to the side. The finger grip 13 is attached to the other end of the syringe body 11 in a sliding manner in the radial direction from the notch 13c so that the flange 11a is sandwiched between the finger hook 13a and the pressing plate 13b.

[0020] As shown in Fig. 1, piston 20 is attached to the inside of syringe body 11 of syringe 10 and is movable along the axial direction inside syringe body 11. More specifically, piston 20 is made of synthetic resin and has a cylindrical support portion 21 with a bottom and a lip portion 23 provided integrally with the outer circumferential surface of support portion 21 via an annular connecting piece 22, as shown in Fig. 3. As shown in Fig. 1, piston 20 is in slidable contact with the inner circumferential surface of syringe body 11 at lip portion 23 to partition and form a storage space S inside syringe body 11.

[0021] The piston 20 is attached to one end of the operating rod 30 so as to be relatively movable in the axial direction. More specifically, an annular groove 21a is provided on the inner peripheral surface of the support portion 21 of the piston 20, and a mounting column portion 31 provided on one end of the operating rod 30 is inserted into the support portion 21, and an annular protrusion 32 provided on the outer peripheral surface of the mounting column portion 31 engages with the annular groove 21a. The axial width of the annular groove 21a is larger than the axial thickness of the annular protrusion 32. As a result, the piston 20 is relatively movable in the axial direction with respect to the operating rod 30 between a position where the annular protrusion 32 abuts against the inner surface of the other end side of the annular groove 21a and a position where one end of the mounting column portion 31 abuts against the inner surface of the support portion 21.

[0022] The piston 20 is rotatable relative to the operating rod 30 about an axis O.

[0023] An elastic body 40 is provided between the operating rod 30 and the piston 20. In this embodiment, the operating rod 30 is integrally provided with a support wall 33 at the base portion of the mounting column portion 31, facing the support portion 21 of the piston 20 with a gap therebetween, and the elastic body 40 is provided between the support wall 33 and the support portion 21.

[0024] As shown in FIG. 3, in this embodiment, the elastic body 40 is made of a synthetic resin material and is integrally formed with the support portion 21 of the piston 20. More specifically, the elastic body 40 has a shape that protrudes from a surface facing the other end side of the support portion 21 toward the support wall 33 and is curved in the circumferential direction centered on the axis O. In this embodiment, a pair of elastic bodies 40 is provided on the surface facing the other end side of the support portion 21 in point symmetry centered on the axis O. As shown in FIG. 1, the elastic body 40 abuts against the support wall 33 at the tip end in a state where it is elastically deformed so as to increase the degree of curvature, and urges the operating rod 30 toward the opposite side (the other end side) of the discharge port 12b relative to the piston 20.

[0025] The operating rod 30 is integrally provided with a rod body 34 having an outer diameter smaller than the inner diameter of the syringe body 11 on the other end side of the support wall 33, and a spiral groove 35 is provided on the outer circumferential surface of the rod body 34. In this embodiment, two spiral grooves 35 are provided on the outer circumferential surface of the rod body 34 in the form of a double helix (double thread). Each spiral groove 35 extends spirally around the axis O on the outer circumferential surface of the rod body 34, and as shown in FIG. 4, has a groove shape with a rectangular cross section having a first side surface 35a facing the discharge port 12b side (the lower side in FIG. 1), a second side surface 35b facing the opposite side to the first side surface 35a, and a bottom surface 35c continuing between the first side surface 35a and the second side surface 35b.

[0026] As shown in FIG. 1, the finger grip 13 is provided with a protrusion 13d. In this embodiment, a pair of protrusions 13d is integrally provided on the pressing plate portion 13b of the finger grip 13, symmetrically sandwiching the axis O. The pair of protrusions 13d protrude radially inward from the inner peripheral surface of the pressing plate portion 13b, one of the protrusions 13d is disposed inside one of the double-stranded spiral grooves 35, and the other of the protrusions 13d is disposed inside the other of the double-stranded spiral grooves 35. As shown in FIG. 4, the pair of protrusions 13d have a parallelogram-shaped outer shape including a pair of surfaces parallel to the first side surface 35a or the second side surface 35b of the corresponding spiral groove 35 and a pair of surfaces parallel to the axis O, and are relatively movable along the corresponding spiral groove 35 inside the corresponding spiral groove 35.

[0027] A plurality of protrusions 36 are provided at predetermined intervals in a direction along the spiral groove 35 on a first side surface 35a of each spiral groove 35 facing the discharge port 12b. In this embodiment, the intervals between the plurality of protrusions 36 provided in each spiral groove 35 correspond to the pitch of the corresponding spiral groove 35, and all of them are arranged at the same circumferential position centered on the axis O. Note that the intervals between the plurality of protrusions 36 in the direction along the spiral groove 35 are not limited to the above, and can be changed in various ways as long as they are the same intervals.

[0028] Each protrusion 36 has an engagement surface 36a extending from the first side surface 35a toward the discharge port 12b and facing one end side of the spiral groove 35 (the left side extending toward the support wall 33 of the spiral groove 35 in FIG. 4), and a first guide surface 36b facing the other end side of the spiral groove 35 (the right side extending toward the other end of the spiral groove 35 in FIG. 4) and inclined with respect to the axial direction (axis O) of the operating rod 30. In this embodiment, the engagement surface 36a is parallel to the axis O, and a connecting surface 36c parallel to the first side surface 35a is provided between the engagement surface 36a and the first guide surface 36b. The connecting surface 36c may not be provided.

[0029] Meanwhile, a plurality of recesses 37 are provided on a second side surface 35b facing the opposite side surface 35a of each spiral groove 35. The same number of protrusions 36 and recesses 37 are provided, and the plurality of recesses 37 are provided facing the corresponding protrusions 36. That is, the intervals between the plurality of recesses 37 in the direction along the spiral groove 35 are the same as those between the plurality of protrusions 36.

[0030] Each recess 37 is disposed offset toward one end of the spiral groove 35 from the locking surface 36a of the corresponding protrusion 36, and includes a second guide surface 37a inclined with respect to the axial direction (axis O) of the operating rod 30, and extends to a position facing the first guide surface 36b. In this embodiment, the recess 37 extends to the other end along the spiral groove 35 beyond the first guide surface 36b. The end of the recess 37 facing the first guide surface 36b is an end surface 37b parallel to the axis O, and a holding surface 37c parallel to the second side surface 35b is between the second guide surface 37a and the end surface 37b. The length of the holding surface 37c in the direction along the spiral groove 35 is slightly longer than the length of the protrusion 13d in the direction along the spiral groove 35. The interval between the protrusion 36 and the recess 37 is set to allow the protrusion 13d to pass through.

[0031] As shown in FIG. 1, the operating rod 30 may have a configuration in which an operating piece 38 having a diameter larger than that of the rod body 34 of the operating rod 30 is attached to the other end thereof so as to be rotatable about the axis O.

[0032] The syringe 10 may also be configured to include an attachment tube portion 14. In this embodiment, the nozzle cap 12 is integrally provided with a cylindrical attachment tube portion 14 that surrounds the outside of the nozzle portion 12a and has a female thread on its inner circumferential surface.

[0033] In the case where the syringe 10 is configured to have an attachment tube portion 14, as shown in FIG. 1, by removably attaching a cap 15 to the attachment tube portion 14, the discharge port 12b can be blocked by the cap 15, thereby preventing the content liquid 2 from leaking out of the storage space S, during distribution of the syringe-type discharge container 1, etc.

[0034] In addition, when the syringe 10 is configured to have the mounting tube portion 14, as shown in FIG. 5, a separate nozzle body 16 can be detachably attached to the mounting tube portion 14 depending on the use of the syringe-type discharge container 1. The nozzle body 16 can have a nozzle portion 16a that is longer and has a tapered shape than the nozzle portion 12a. When such a nozzle body 16 is attached to the mounting tube portion 14, the nozzle portion 16a connected to the discharge port 12b can be inserted into the soil to directly discharge the content liquid 2 from the tip of the nozzle portion 16a into the soil. The shape of the nozzle body 16 can be changed in various ways depending on the use.

[0035] Next, a method of using the syringe-type dispensing container 1 having the above configuration will be described.

[0036] First, from the state shown in Fig. 1, the cap 15 is removed from the mounting cylinder 14, and if necessary, the nozzle body 16 shown in Fig. 5 is attached to the mounting cylinder 14. At this time, the operating rod 30 is urged toward the other end side of the piston 20 by the elastic body 40, so that the convex portion 13d provided on the finger grip 13 is disposed in the concave portion 37 in contact with the holding surface 37c inside the spiral groove 35, as shown in Fig. 4.

[0037] Next, the index finger and middle finger are hooked on the finger hook portion 13a, and the thumb is placed on the operation piece 38 of the operation rod 30 to hold the syringe-type discharge container 1. Then, the discharge port 12b or the nozzle portion 16a is oriented in a desired direction, and the operation piece 38, i.e., the operation rod 30, is pushed toward the inside (one end side) of the syringe 10.

[0038] When the operation of pushing the operating rod 30 toward the inside of the syringe 10 is started, the operating rod 30 moves toward the inside (one end side) of the syringe body 11 relative to the convex portion 13d provided on the finger grip 13. As a result, as shown in FIG. 6(a), the convex portion 13d arranged inside the recess 37 moves from the second side surface 35b side to the first side surface 35a side, moves relatively inside the spiral groove 35 along the first guide surface 36b, reaches the first side surface 35a, and then moves relatively inside the spiral groove 35 along the first side surface 35a. As a result, the operating rod 30 is pushed in the axial direction toward the inside of the syringe body 11 while rotating relatively with respect to the syringe 10 or the finger grip 13 about the axis O.

[0039] When the operating rod 30 is pushed toward the inside of the syringe body 11 while rotating relative to the syringe 10 or the finger grip 13 around the axis O, the elastic body 40 elastically deforms to narrow the gap between the piston 20 and the support wall 33, and the piston 20 moves inside the syringe body 11 toward the outlet 12b, and the content liquid 2 inside the storage space S is ejected to the outside from the outlet 12b.

[0040] When the operating rod 30 is pushed in a predetermined amount toward one end side, as shown in Fig. 6(b), the convex portion 13d, which moves relatively inside the spiral groove 35 along the first side surface 35a, comes into contact with the locking surface 36a of the protrusion 36, and its movement is restricted. This restricts further pushing of the operating rod 30, and the pushing operation of the operating rod 30 is completed. In this way, when the operating rod 30 is pushed in, the convex portion 13d is locked with the locking surface 36a, restricting further pushing of the operating rod 30, and only a predetermined amount of the content liquid 2 is discharged from the discharge port 12b.

[0041] When the pushing operation of the operating rod 30 is released, the spring force of the elastic body 40 pushes the operating rod 30 back toward the other end side against the piston 20 stopped inside the syringe body 11. As a result, as shown in Fig. 6(c), the convex portion 13d that was locked to the locking surface 36a of the protrusion 36 moves from the first side surface 35a side to the second side surface 35b side, moves relatively inside the spiral groove 35 along the second guide surface 37a, reaches the inside of the recess 37, and comes into contact with the holding surface 37c as shown in Fig. 4. As a result, the locking of the convex portion 13d by the locking surface 36a is released, and the operating rod 30 can be pushed in again.

[0042] Thereafter, by repeatedly pushing the operating rod 30 in the same manner as above, the content liquid 2 can be discharged from the discharge port 12b in a constant amount over a number of times.

[0043] In this way, the syringe-type dispensing container 1 according to this embodiment is provided with a spiral groove 35 having a plurality of protrusions 36 and a plurality of recesses 37 on the operating rod 30, a convex portion 13d disposed on the spiral groove 35 is provided on the finger grip 13, and the operating rod 30 is biased by the elastic body 40 toward the opposite side of the discharge port 12b with respect to the piston 20, so that the content liquid 2 can be dispensed in small portions in a predetermined amount in a plurality of times with a simple configuration. Therefore, the manufacturing cost of the syringe-type dispensing container 1 capable of dispensing the content liquid 2 in small portions in a predetermined amount in a plurality of times can be further reduced.

[0044] Furthermore, in the syringe-type dispensing container 1 according to this embodiment, the piston 20 and the elastic body 40 are integrally formed from a synthetic resin material, thereby further simplifying the configuration of the syringe-type dispensing container 1 and further reducing the manufacturing cost of the syringe-type dispensing container 1.

[0045] Furthermore, in the syringe-type dispensing container 1 according to this embodiment, the syringe 10 is provided with an attachment tubular portion 14 to which a cap 15 for closing the discharge outlet 12b or a nozzle body 16 connected to the discharge outlet 12b can be detachably attached. Therefore, by attaching the cap 15 to the attachment tubular portion 14, it is possible to reliably prevent leakage of the content liquid 2 from the discharge outlet 12b during distribution, and by attaching nozzle bodies 16 of various types or shapes to the attachment tubular portion 14, the syringe-type dispensing container 1 can be adapted for various uses.

[0046] Furthermore, in the syringe-type dispensing container 1 of this embodiment, an operating piece 38 having a larger diameter than the operating rod 30 is attached to the other end of the operating rod 30 so as to be freely rotatable. Therefore, when the operating rod 30 is pushed in and rotates relative to the syringe 10 about the axis O, the operating piece 38 against which the thumb is placed does not rotate, thereby improving the operability of the pushing operation.

[0047] The present invention is not limited to the above-described embodiment, and it goes without saying that various modifications can be made without departing from the spirit and scope of the present invention.

[0048] For example, in the above embodiment, the syringe 10 is of an assembled type, but this is not limited thereto, and the syringe body 11 may be configured such that either or both of the nozzle cap 12 and the finger grip 13 are integrally provided therewith.

[0049] In the above embodiment, the helical groove 35 is provided in the outer circumferential surface of the operating rod 30 in the form of a double helix (double thread), but it is sufficient to provide at least one helical groove 35. Also, as long as at least one protrusion 13d is provided on the finger grip 13, the number of protrusions 13d can be changed in accordance with the number of helical grooves 35, etc. [Explanation of symbols]

[0050] 1. Syringe-type dispensing container 2 Content liquid 10 Syringe 11 Syringe body 11a Flange 12 Nozzle cap 12a Nozzle part 12b Discharge port 13 Finger Grip 13a Finger rest 13b Presser plate 13c Notch 13d Convex 14 Mounting tube 15 Cap 16 Nozzle body 16a Nozzle part 20 Piston 21 Support part 21a Annular groove 22 Connecting piece 23 Lip 30 Operating rod 31 Mounting column 32 Annular protrusion 33 Supporting wall 34 Rod body 35 Spiral groove 35a 1st side 35b 2nd side 35c bottom 36 Protrusion 36a Locking surface 36b First guide surface 36c Connecting surface 37 Recess 37a 2nd guide surface 37b End face 37c holding surface 38 Operation piece 40 Elastic Body O axis S Storage space

Claims

1. a syringe having a discharge port at one end and a finger grip at the other end; A piston attached inside the syringe so as to be movable along an axial direction; an operating rod having a spiral groove on an outer circumferential surface and the piston attached to one end thereof so as to be movable relative to the operating rod in the axial direction; an elastic body provided between the operating rod and the piston and configured to bias the operating rod toward an opposite side to the discharge port relative to the piston; a protrusion provided on the finger grip and disposed inside the spiral groove so as to be movable along the spiral groove; a plurality of protrusions each provided at a predetermined interval in a direction along the spiral groove on a first side surface facing the discharge port of the spiral groove, each protrusion extending from the first side surface toward the discharge port and including a locking surface facing one end of the spiral groove and a first guide surface facing the other end of the spiral groove and inclined with respect to the axial direction of the operating rod; a plurality of recesses each provided on a second side surface of the spiral groove facing opposite the first side surface, each of which is shifted toward one end of the spiral groove relative to the corresponding engaging surface, each of which has a second guide surface inclined with respect to the axial direction of the operating rod, and each of which extends to a position opposite the first guide surface.

2. 2. The syringe type dispensing container according to claim 1, wherein said piston and said elastic body are integrally formed from a synthetic resin material.

3. 3. The syringe type dispensing container according to claim 1, wherein the syringe is provided with a mounting tube portion to which a cap for closing the discharge port or a nozzle body connected to the discharge port can be detachably mounted.

4. 3. The syringe-type dispensing container according to claim 1, wherein an operating piece having a diameter larger than that of the operating rod is rotatably attached to the other end of the operating rod.

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