Discharger

Abstract

To provide a discharger in which fitting of a nozzle tip is hardly released even when impact is applied to a nozzle.SOLUTION: A discharger 2 includes: a cylinder 5a1; a piston 11; a holding member 7 which has a nozzle 9 and performs an elevating / lowering operation; and an internal flow passage 10 which sends liquid 4 to a discharge port 10b. The nozzle 9 has a nozzle tip 9a, a tip holding member 9b, and a nozzle base cylinder section 9c. The nozzle tip 9a has a tip cylinder 9a1 and a tip distal end wall 9a2. The tip holding member 9b has a holding cylinder 9b1 and a columnar body 9b3 formed integrally with the holding cylinder 9b1 through a connection section 9b2. The holding cylinder 9b1 has a holding cylinder distal end 9b4 and an outer cylinder section 9b5. The columnar body 9b3 has an outer peripheral surface which comes into contact with an inner peripheral surface of the tip cylinder 9a1. The internal flow passage 10 has a base cylinder flow passage 10c, a communication flow passage 10d, a tip cylinder flow passage 10e, a tip distal end wall flow passage 10f and the discharge port 10b in this order from an upstream side to a downstream side. The nozzle 9 has a seal fitting section 9d constituted of an annular protrusion section 9d1 and an annular recess section 9d2.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to a dispenser.

Background Art

[0002] A cylinder, a piston that slides on the cylinder, a holding member that has a nozzle and moves up and down relative to the cylinder with the piston by an external discharge operation, and a pump chamber defined by the cylinder and the piston. It has an internal flow path for sending and discharging a liquid to the discharge port of the nozzle according to the up and down movement of the holding member. The nozzle has a nozzle tip, a nozzle base cylinder to which the nozzle tip is attached, and a core rod inserted into the nozzle base cylinder. The nozzle tip has a tip cylinder and a tip end wall that extends radially inward from the tip of the tip cylinder and has a discharge port. The internal flow path includes a flow path defined by the inner peripheral surface of the nozzle base cylinder and the outer peripheral surface of the core rod, a tip cylinder flow path defined by the inner peripheral surface of the tip cylinder and the outer peripheral surface of the core rod, and a tip end wall flow path defined by the inner surface of the tip end wall and the tip end surface of the core rod, and a discharge port in this order from the upstream side to the downstream side. A dispenser is known (see, for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] For a dispenser as described above, even when an impact acts on the nozzle due to dropping or the like, it is preferable that the fitting does not come off and the nozzle tip is less likely to protrude from or fall off the nozzle base cylinder.

[0005] Therefore, an object of the present invention is to provide a dispenser in which the fitting of the nozzle tip is difficult to come off even when an impact acts on the nozzle.

Means for Solving the Problems

[0006] One aspect of the present invention is as follows.

[0007] [1] A cylinder, A piston that slides on the cylinder, A holding member that has a nozzle and moves up and down relative to the cylinder together with the piston by an ejection operation from the outside, An internal flow path that feeds and discharges a liquid to the discharge port of the nozzle according to the up-and-down movement of the holding member through a pump chamber defined by the cylinder and the piston, The nozzle includes a nozzle tip, a tip holding member to which the nozzle tip is attached, and a nozzle base cylinder portion to which the tip holding member is attached. The nozzle tip includes a tip cylinder and a tip tip wall that extends radially inward from the tip of the tip cylinder and has the discharge port. The tip holding member includes a holding cylinder that extends in the nozzle axial direction, and a columnar body that is provided on the radially inner side of the holding cylinder and is integrally formed with the holding cylinder via a connecting portion. The holding cylinder has an inner peripheral surface that fits on the outer peripheral surface of the tip cylinder, a holding cylinder tip portion that extends from the connecting portion toward the nozzle tip side, and an outer cylinder portion that extends from the connecting portion toward the nozzle base end side and fits on the outer peripheral surface of the nozzle base cylinder portion. The columnar body has an outer peripheral surface that contacts the inner peripheral surface of the tip cylinder. The internal flow path includes a base cylinder flow path defined by the inner peripheral surface of the nozzle base cylinder portion, a communication flow path that extends from the tip of the nozzle base cylinder portion through the connecting portion in the nozzle axial direction to the base end of the tip cylinder, a tip cylinder flow path defined by the inner peripheral surface of the tip cylinder and the outer peripheral surface of the columnar body, a tip tip wall flow path defined by the inner surface of the tip tip wall and the tip surface of the columnar body, and the discharge port, in this order from the upstream side to the downstream side. The nozzle is a discharger having a seal fitting portion including an annular convex portion and an annular concave portion that are brought into close contact with each other over the entire circumference to make the outer cylinder portion and the nozzle base cylinder portion fit together.

[0008] [2] The nozzle base cylinder portion has an annular stepped surface facing the base end surface of the outer cylinder portion, and an inner cylinder portion extending from the annular stepped surface toward the nozzle tip side. The inner cylinder portion has a base end side fitting surface extending from the annular stepped surface toward the nozzle tip side and fitting to the inner peripheral surface of the outer cylinder portion via the seal fitting portion, a reduced diameter surface extending while reducing the diameter from the tip of the base end side fitting surface toward the nozzle tip side, and a tip side fitting surface extending from the tip of the reduced diameter surface toward the nozzle tip side and fitting to the inner peripheral surface of the outer cylinder portion. The ejector according to [1].

[0009] [3] The nozzle has a plurality of the seal fitting portions provided on the base end side fitting surface of the inner cylinder portion and arranged in the nozzle axis direction. The ejector according to [1] or [2].

[0010] [4] The base end surface of the columnar body and the base end surface of the connecting portion are located on the nozzle tip side rather than the tip of the nozzle base cylinder portion. The ejector according to any one of [1] to [3].

[0011] [5] An ejector according to any one of [1] to [4], and a container body having a mouth portion and containing a liquid. The ejector has a base member having the cylinder and attached to the mouth portion, and a trigger swingably supported by the base member. The holding member is a discharge container that sends and discharges the liquid in the container body to the discharge port by performing the lifting operation with respect to the base member by the discharge operation to the trigger.

Effect of the Invention

[0012] According to the present invention, it is possible to provide an ejector in which the fitting of the nozzle tip is unlikely to come off even when an impact acts on the nozzle.

Brief Description of the Drawings

[0013]

Figure 1

Figure 2

Mode for Carrying Out the Invention

[0014] Hereinafter, embodiments of the present invention will be exemplified and described with reference to the drawings.

[0015] As shown in FIG. 1, in one embodiment of the present invention, the discharge container 1 includes a discharger 2 and a container body 3 that has a mouth portion 3a, a body portion 3b, and a bottom portion (not shown) connected in this order and stores a liquid 4. The discharger 2 has a cylindrical cylinder 5a1 centered on a central axis O and a base member 5 attached to the mouth portion 3a, a trigger 6 swingably supported by the base member 5, a holding member 7, and a biasing member 8 (spring) that biases the holding member 7 upward. The holding member 7 moves up and down with respect to the base member 5 by an external discharge operation that pulls the trigger 6 against the biasing force of the biasing member 8, thereby sending and discharging the liquid 4 in the container body 3 to the discharge port 10b of the nozzle 9 through the pump chamber 10a in the cylinder 5a1. The base member 5 has a reversible unit 5b, and in the upright posture of the discharge container 1, the liquid 4 flows from the upper end of the suction pipe 5c to the pump chamber 10a by the up-and-down movement of the holding member 7, and in the inverted posture, the liquid 4 flows from the side hole 5b1 of the reversible unit 5b to the pump chamber 10a by the up-and-down movement of the holding member 7. The liquid 4 is not particularly limited, but in this embodiment, it is a chemical such as a deodorant or an antiperspirant. In this embodiment, the vertical direction is the direction along the central axis O of the cylinder 5a1, the upward direction is the direction from the cylinder 5a1 side to the nozzle 9 side (from the bottom side of the container body 3 to the mouth portion 3a side) along the vertical direction, and the downward direction is the opposite direction.

[0016] As shown in FIGS. 1 to 2, in the present embodiment, the ejector 2 includes a cylinder 5a1, a piston 11 that slides on the cylinder 5a1, a holding member 7 that has a nozzle 9 and moves up and down with respect to the cylinder 5a1 along with the piston 11 by an external ejection operation, and an internal flow path 10 that feeds and ejects the liquid 4 to the discharge port 10b of the nozzle 9 according to the up and down movement of the holding member 7 through a pump chamber 10a defined by the cylinder 5a1 and the piston 11. The nozzle 9 includes a nozzle tip 9a, a tip holding member 9b to which the nozzle tip 9a is attached, and a nozzle base cylinder portion 9c to which the tip holding member 9b is attached. The nozzle tip 9a includes a tip cylinder 9a1 and a tip end wall 9a2 that extends radially inward from the tip of the tip cylinder 9a1 and has a discharge port 10b. The tip holding member 9b includes a holding cylinder 9b1 that extends in the nozzle axial direction along the axis P of the nozzle 9, and a columnar body 9b3 that is provided inside the holding cylinder 9b1 in the radial direction and is integrally formed with the holding cylinder 9b1 through a connecting portion 9b2. The holding cylinder 9b1 has an inner peripheral surface that fits on the outer peripheral surface of the tip cylinder 9a1, a holding cylinder tip portion 9b4 that extends from the connecting portion 9b2 toward the nozzle tip side, and an outer cylinder portion 9b5 that extends from the connecting portion 9b2 toward the nozzle base end side and fits on the outer peripheral surface of the nozzle base cylinder portion 9c. The columnar body 9b3 has an outer peripheral surface that contacts the inner peripheral surface of the tip cylinder 9a1. The internal flow path 10 includes a base cylinder flow path 10c defined by the inner peripheral surface of the nozzle base cylinder portion 9c, a communication flow path 10d that extends from the tip of the nozzle base cylinder portion 9c through the connecting portion 9b2 in the nozzle axial direction to the base end of the tip cylinder 9a1, a tip cylinder flow path 10e defined by the inner peripheral surface of the tip cylinder 9a1 and the outer peripheral surface of the columnar body 9b3, a tip end wall flow path 10f defined by the inner surface of the tip end wall 9a2 and the tip end surface of the columnar body 9b3, and the discharge port 10b, in this order from the upstream side to the downstream side. The nozzle 9 has a seal fitting portion 9d including an annular convex portion 9d1 and an annular concave portion 9d2 that are in close contact with each other over the entire circumference to make the outer cylinder portion 9b5 and the nozzle base cylinder portion 9c fit together.Note that, in the present embodiment, the internal flow path 10 has, from the upstream side to the downstream side in this order, a pipe flow path 10g partitioned by the inner peripheral surface of the suction pipe 5c, a unit flow path 10h partitioned by the inner surface of the upright and inverted dual-use unit 5b, a unit connection flow path 10i extending from the downstream end of the unit flow path 10h to the upstream end of the pump chamber 10a, the pump chamber 10a, a holding member longitudinal flow path 10j extending from the downstream end of the pump chamber 10a through the radially inner side of the annular piston 11 to the upstream end of the base cylinder flow path 10c, the base cylinder flow path 10c, a communication flow path 10d, a chip cylinder flow path 10e, a chip tip wall flow path 10f, and a discharge port 10b. The chip cylinder flow path 10e, the chip tip wall flow path 10f, and the discharge port 10b are formed so as to discharge (spray) the liquid 4 in a mist form from the discharge port 10b.

[0017] According to the above configuration, since the columnar body 9b3 that forms the flow path inside the nozzle tip 9a is integrally formed with the holding cylinder 9b1 into which the nozzle tip 9a is fitted via the connecting portion 9b2, even when an impact acts on the nozzle 9 due to the dropping of the discharge container 1 or the like, it is possible to suppress the columnar body 9b3 from relatively moving to the nozzle tip side with respect to the holding cylinder 9b1 and pushing out the nozzle tip 9a to the nozzle tip side. On the other hand, although the chip holding member 9b having the holding cylinder 9b1 is formed separately from the nozzle base cylinder portion 9c, by means of the seal fitting portion 9d composed of an annular convex portion 9d1 and an annular concave portion 9d2 that closely contact the outer cylinder portion 9b5 of the chip holding member 9b and the nozzle base cylinder portion 9c over the entire circumference, it is fitted and held in a liquid-tight and strong manner to the nozzle base cylinder portion 9c. Further, since the inner peripheral surface of the chip cylinder 9a1 can be supported from the radially inner side by the columnar body 9b3 that contacts the inner peripheral surface, it is possible to suppress the chip cylinder 9a1 whose outer peripheral surface is fitted to the holding cylinder 9b1 from deforming radially inward due to an impact. Therefore, even when an impact acts on the nozzle 9, it is possible to realize a discharger 2 in which the fitting of the nozzle tip 9a is unlikely to come off.

[0018] The nozzle base cylinder portion 9c has an annular stepped surface 9c1 facing the base end surface of the outer cylinder portion 9b5, and an inner cylinder portion 9c2 extending from the annular stepped surface 9c1 toward the nozzle tip side. The inner cylinder portion 9c2 has a base end side fitting surface 9c3 that extends from the annular stepped surface 9c1 toward the nozzle tip side and fits onto the inner peripheral surface of the outer cylinder portion 9b5 via a seal fitting portion 9d, a reduced diameter surface 9c4 that extends while reducing in diameter from the tip of the base end side fitting surface 9c3 toward the nozzle tip side, and a tip side fitting surface 9c5 that extends from the tip of the reduced diameter surface 9c4 toward the nozzle tip side and fits onto the inner peripheral surface of the outer cylinder portion 9b5. According to the above configuration, the chip holding member 9b can be easily attached to the nozzle base cylinder portion 9c, and it is easy to obtain good liquid tightness and fitting force.

[0019] The nozzle 9 has a plurality (three) of seal fitting portions 9d provided on the base end side fitting surface 9c3 of the inner cylinder portion 9c2 and arranged in the nozzle axis direction. According to the above configuration, it is easy to obtain even better liquid tightness and fitting force with the plurality of seal fitting portions 9d. Note that the number of seal fitting portions 9d provided on the nozzle 9 is not limited to three.

[0020] The base end surface of the columnar body 9b3 and the base end surface of the connecting portion 9b2 are located on the nozzle tip side rather than the tip of the nozzle base cylinder portion 9c. According to the above configuration, even when an impact acts on the nozzle 9, it is possible to suppress the impact from being transmitted from the tip of the nozzle base cylinder portion 9c to the columnar body 9b3 and pushing the nozzle tip 9a toward the nozzle tip side. Also, compared to the case where the columnar body 9b3 extends from the connecting portion 9b2 toward the nozzle base end side so as to enter the inside of the nozzle base cylinder portion 9c, the columnar body 9b3 is shorter, so the weight can be reduced.

[0021] The ejector 2 is provided at a portion between the pump chamber 10a and the discharge port 10b in the internal flow path 10, and has a pressure accumulation portion 12 that accumulates the liquid 4. In the present embodiment, the holding member 7 has a nozzle head 7a having a nozzle 9, a stem 7b attached to the nozzle head 7a, and a piston guide 7c attached to the stem 7b. The pressure accumulation portion 12 includes a piston 11, a seated portion 7c1 provided in the piston guide 7c on which the seating portion 11a of the piston 11 seats by descending with respect to the piston guide 7c, and an elastic portion 7b1 provided at the lower end portion of the stem 7b that biases the piston 11 downward, but is not limited thereto.

[0022] The base member 5 has a cylinder member 5a having a cylinder 5a1, a positive and negative inversion dual-purpose unit 5b attached to the lower end portion of the cylinder member 5a, a suction pipe 5c attached to the lower end portion of the positive and negative inversion dual-purpose unit 5b, a mounting cap 5d that attaches the cylinder member 5a to the mouth portion 3a by being attached to the mouth portion 3a, and a trigger support member 5e attached to the upper end portion of the cylinder member 5a. The trigger support member 5e has an annular portion 5e1 through which the stem 7b passes, and a support arm 5e2 that obliquely extends upward from the annular portion 5e1. The tip of the support arm 5e2 holds the trigger 6 so as to be swingable. The trigger 6 has an opening 6a through which the nozzle 9 passes between the base end portion of the trigger 6 swingably connected to the support arm 5e2 and the tip of the trigger 6.

[0023] The ejector 2 has a stopper 13 that can be arranged at a blocking position (the position shown in FIG. 1) that blocks the descent of the holding member 7 from the initial position before the ejection operation or moved from the blocking position by an external operation different from the ejection operation. In the present embodiment, the stopper 13 can move bidirectionally by rotation between the blocking position and a release position where the blocking of the descent of the holding member 7 is released, but is not limited thereto. The ejector 2 may be configured without the stopper 13.

[0024] In the state where the stopper 13 is in the blocking position, by the discharging operation, the trigger 6 presses down the holding member 7 via the pressing portion 6b of the trigger 6 and the pressed portion 7a1 of the nozzle head 7a. In the present embodiment, the pressed portion 7a1 is composed of a pair of protrusions respectively protruding from both side surfaces of the nozzle head 7a in the direction along the swinging axis Q of the trigger 6, and the pressing portion 6b is formed by the lower surface of the trigger 6 having a concave shape that is concave upward when viewed along the swinging axis Q, but is not limited thereto.

[0025] In the present embodiment, the nozzle head 7a and the chip holding member 9b are formed using polypropylene resin (PP) as the material, and the nozzle chip 9a is formed using polyacetal resin (POM) as the material, but the materials forming each of them are not particularly limited. For example, as the materials for forming the nozzle head 7a, the chip holding member 9b, and the nozzle chip 9a, resins such as polyolefin resins such as PP and polyethylene resin (PE), or polyester resins such as polyethylene terephthalate resin (PET) can be used respectively.

[0026] Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and the above-described embodiments can be variously modified without departing from the gist of the present invention.

Explanation of Reference Numerals

[0027] 1 Discharge container 2 Discharger 3 Container body 3a Mouth portion 3b Body portion 4 Liquid 5 Base member 5a Cylinder member 5a1 Cylinder 5b Upright and inverted dual-purpose unit 5b1 Side hole 5c Suction pipe 5d Mounting cap 5e Trigger support member 5e1 Annular portion 5e2 Support arm 6 Trigger 6a Opening 6b Pushing part 7 Holding member 7a Nozzle head 7a1 Pushed part 7b Stem 7b1 Elastic part 7c Piston guide 7c1 Seated part 8 Biasing member 9 Nozzle 9a Nozzle tip 9a1 Tip cylinder 9a2 Tip end wall 9b Tip holding member 9b1 Holding cylinder 9b2 Connecting part 9b3 Columnar body 9b4 Tip of holding cylinder 9b5 Outer cylinder part 9c Nozzle base cylinder part 9c1 Annular step surface 9c2 Inner cylinder part 9c3 Fitting surface on base end side 9c4 Reduced diameter surface 9c5 Fitting surface on tip end side 9d Seal fitting part 9d1 Annular convex part 9d2 Annular concave part 10 Internal flow path 10a Pump chamber 10b Discharge port 10c Base cylinder flow path 10d Communication flow path 10e Tip cylinder flow path 10f Tip end wall flow path 10g Pipe flow path 10h Unit flow path 10i Unit connection flow path 10j Vertical flow path of holding member 11 Piston 11a Seated part 12 Pressure accumulation part 13 Stopper O Central axis P Axis center Q Rocking axis

Claims

1. A cylinder, a piston that slides on the cylinder, a holding member that has a nozzle and performs a lifting operation with respect to the cylinder along with the piston by an ejection operation from the outside, and an internal flow path that sends and discharges liquid to the discharge port of the nozzle according to the lifting operation of the holding member through a pump chamber partitioned by the cylinder and the piston. The nozzle has a nozzle tip, a chip holding member to which the nozzle tip is attached, and a nozzle base cylinder portion to which the chip holding member is attached. The nozzle tip has a tip cylinder and a tip end wall that extends radially inward from the tip of the tip cylinder and has the discharge port. The chip holding member has a holding cylinder that extends in the nozzle axis direction and a columnar body that is provided inside the holding cylinder in the radial direction and is integrally formed with the holding cylinder via a connecting portion. The holding cylinder has an inner peripheral surface that fits on the outer peripheral surface of the tip cylinder, a holding cylinder tip portion that extends from the connecting portion toward the nozzle tip side, and an outer cylinder portion that extends from the connecting portion toward the nozzle base end side and fits on the outer peripheral surface of the nozzle base cylinder portion. The columnar body has an outer peripheral surface that contacts the inner peripheral surface of the tip cylinder. The internal flow path has, in this order from the upstream side to the downstream side, a base cylinder flow path partitioned by the inner peripheral surface of the nozzle base cylinder portion, a communication flow path that extends from the tip of the nozzle base cylinder portion through the connecting portion in the nozzle axis direction to the base end of the tip cylinder, a tip cylinder flow path partitioned by the inner peripheral surface of the tip cylinder and the outer peripheral surface of the columnar body, a tip end wall flow path partitioned by the inner surface of the tip end wall and the tip end surface of the columnar body, and the discharge port. The nozzle is an ejector having a seal fitting portion including an annular convex portion and an annular concave portion that are closely fitted to each other to closely contact the outer cylinder portion and the nozzle base cylinder portion over the entire circumference.

2. The nozzle base cylinder portion has an annular stepped surface that faces the base end surface of the outer cylinder portion and an inner cylinder portion that extends from the annular stepped surface toward the nozzle tip side. The inner cylinder portion has a base end side fitting surface that extends from the annular stepped surface toward the nozzle tip side and fits on the inner peripheral surface of the outer cylinder portion via the seal fitting portion, a reduced diameter surface that extends while reducing the diameter from the tip of the base end side fitting surface toward the nozzle tip side, and a tip end side fitting surface that extends from the tip of the reduced diameter surface toward the nozzle tip side and fits on the inner peripheral surface of the outer cylinder portion. The ejector according to claim 1.

3. The nozzle has a plurality of seal fitting portions provided on the fitting surface on the base end side of the inner cylinder portion and arranged in the nozzle axis direction, and the ejector according to claim 1.

4. The base end surface of the columnar body and the base end surface of the connecting portion are located on the nozzle tip side rather than the tip of the nozzle base cylinder portion, and the ejector according to claim 1.

5. The ejector according to claim 1, A container body having a mouth portion and accommodating a liquid, The ejector has a base member having the cylinder and attached to the mouth portion, A trigger swingably supported by the base member, The holding member is a discharge container that sends and discharges the liquid in the container body to the discharge port by performing the elevating operation with respect to the base member by the discharge operation to the trigger.

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