JP6422411B2 - Nozzle head - Google Patents

Description

  The present invention relates to a nozzle head mounted on a liquid ejector that ejects liquid contained in a container body.

  In a liquid discharger such as a dispenser pump, a back suction function for sucking the content remaining in the nozzle into the pump body is provided to prevent the content from dripping from the tip of the nozzle. In order to pull back the contents remaining in the nozzle more completely, it has been proposed to attach an elastic cap to the upper end of the pressing head (for example, Patent Document 1).

  In the liquid ejector of Patent Document 1, an air chamber is formed between the pressing head top wall and the cap top wall. Since the air chamber communicates with the tube hole of the stem fitting cylinder that opens at the base end of the nozzle hole, the push head is lowered to the initial position after the push head is pushed down to discharge the liquid content. When returning, the air chamber becomes negative pressure. As a result, outside air is sucked from the nozzle hole, and the contents remaining in the nozzle can be pulled back into the stem by the back suction function.

Japanese Utility Model Publication No. 2-70755

  However, in the case of the above-mentioned Patent Document 1, in order to reliably develop the back suction function, it is necessary to accurately push down the elastic cap attached to the upper end portion of the push-down head so that the air chamber has a negative pressure. FIG. 2 of Patent Document 1 shows that the elastic cap is pushed down with a finger. Furthermore, it is described that when the finger of pressing is released, the top wall of the elastic cap is elastically restored and the air chamber is negatively pressured.

  As described above, the liquid ejector of Patent Document 1 is limited in operability because it is necessary to push down the elastic cap with a finger. If the back suction function can be exhibited not only when the finger is pressed down but also when the elastic cap is pushed with the palm of the hand, the operability is further improved.

  Therefore, an object of the present invention is to provide a nozzle head that can exhibit the back suction function more reliably with better operability.

A nozzle head according to the present invention is a nozzle head mounted on a liquid ejector having a tube body that is held in a container body so as to be able to be pushed in, a nozzle cylinder communicating with the tube body, the tube body, and the nozzle A storage chamber formed between the cylinder, an elastic lid made of a flat plate that can change the internal volume of the storage chamber, and the elastic lid can be pushed inward of the storage chamber. An operating body provided on the operating body, wherein the operating body has a pressing portion protruding toward the elastic lid body, the pressing portion having a curved outer peripheral surface in contact with the elastic lid body, and the storage chamber Has a curved inner circumferential surface, and the curvature of the curved outer circumferential surface is larger than the curvature of the curved inner circumferential surface .

According to the present invention, the nozzle head has a storage chamber in the head body whose inner volume is variable by deformation of the elastic lid made of a flat plate-like body , and the elastic lid is pressed by the pressing portion. As a result, the internal volume of the storage chamber decreases. Since the storage chamber is provided between the tube body and the nozzle cylinder held so as to be able to be pushed into the container body, when the shape of the elastic lid body is restored and the internal volume of the storage chamber increases, the nozzle A back suction function for sucking the contents remaining in the cylinder into the accommodation chamber is exhibited.

The pressing portion protrudes toward the elastic lid and is formed on the operating body. Since this operation body can push the elastic lid toward the inside of the storage chamber, the internal volume of the storage chamber is surely reduced by pushing the operation body and pressing the elastic lid with the pressing portion. be able to. Thus, the nozzle head according to the present invention can express the back suction function more surely with a simple configuration and better operability.

It is a fragmentary sectional view showing the composition of the liquid ejector with which the nozzle head concerning this embodiment was equipped. It is a longitudinal section in the state where the operation body in the nozzle head concerning this embodiment was opened. It is a top view of the state which opened the operation body in the nozzle head concerning this embodiment. It is a figure explaining the state by which the content is discharged from a nozzle hole by pushing in the operation body of the nozzle head which concerns on this embodiment. It is a fragmentary sectional view explaining the state where the elastic lid in the nozzle head concerning this embodiment was pressed and changed.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

(overall structure)
The nozzle head 10 of this embodiment is mounted on a liquid ejector such as a pump dispenser 46 shown in FIG. The pump dispenser 46 is attached to a container main body 50 that stores contents such as liquid, and can discharge the contents stored in the container main body 50. As shown, the pump dispenser 46 can be attached to the container body 50 via a cap 44.

  In the pump dispenser 46, a cylinder 42 is provided through the top surface of the cap 44. In the cylinder 42, the tubular body 40 is held so as to be pushed in a state of being urged upward by an urging means such as a compression coil spring (not shown).

  The nozzle head 10 according to the present embodiment includes a head body 12 having a top portion 16 and an operation body 30 that covers the top portion 16 of the head body 12 and is disposed on the cylinder 42 with a side wall of the cylinder 42 interposed therebetween. .

  The head body 12 includes a vertical cylinder 14 that communicates with the tube body 40 in the cylinder 42, a nozzle cylinder 24 that communicates with the vertical cylinder 14 and discharges contents, and a guide cylinder 22 that surrounds the outside of the cylinder 42. Including. The side wall of the cylinder 42 is sandwiched between the vertical cylinder 14 and the guide cylinder 22. A storage chamber 18 is provided at the top 16 of the head body 12 which is the upper end of the vertical cylinder 14. The storage chamber 18 is located between the tube body 40 and the nozzle cylinder 14.

  The vertical cylinder 14 is connected to the tubular body 40 by being externally fitted to the upper end portion of the tubular body 40. As described above, the vertical cylinder 14 is connected to the upper end portion of the tube body 40, so that the nozzle head 10 can be pushed in a state of being biased upward.

  The nozzle cylinder 24 has an elongated shape that extends substantially horizontally to the outside of the head main body 12 and has its tip end slightly bent downward. The nozzle cylinder 24 has a discharge passage 25 communicating with the inside of the vertical cylinder 14. Thus, the nozzle cylinder 24 communicates with the tube body 40 via the vertical cylinder 14.

  The accommodation chamber 18 provided in the top portion 16 communicates with the inside of the vertical cylinder 14 through the through hole 20. In the present embodiment, the storage chamber 18 includes a concave portion having a curved inner peripheral surface. The through hole 20 is provided in a substantially central portion of the storage chamber 18 having a curved inner peripheral surface. The inside of the storage chamber 18 communicates with the outside of the nozzle hole 24 a through the through hole 20 and the outflow path 25.

  The opening of the storage chamber 18 is closed by an elastic lid 28. In the present embodiment, the elastic lid body 28 is a flat plate made of a rubber material, and has a fitting projection 28a at the lower peripheral edge. The elastic lid body 28 is attached to the top portion 16 by fitting a fitting protrusion 28 a at the lower peripheral edge into a receiving hole (not shown) of the top portion 16.

  As will be described later, the elastic lid 28 can be deformed by being pressed by the pressing portion 32, and the internal volume of the storage chamber 18 is reduced by the deformation of the elastic lid 28. When the deformation of the elastic lid 28 is maximized, the elastic lid 28 comes into contact with the inner peripheral surface of the storage chamber 18 and the open end of the through hole 20 on the storage chamber 18 side is closed. In order to achieve this, it is desirable to appropriately set the material and thickness of the elastic lid 28 and the depth of the storage chamber 18.

  The operation body 30 is provided above the top portion 16 of the head body 12 so as to be able to be pushed inward of the storage chamber 18. The operation body 30 is formed with a pressing portion 32 that protrudes toward the elastic lid body 28 that closes the opening of the storage chamber 18. When the elastic lid 28 is pressed by the pressing portion 32, the elastic lid 28 is deformed toward the inner peripheral surface of the storage chamber 18, and the internal volume of the storage chamber 18 is reduced.

  The shape and size of the pressing portion 32 are set so that the internal volume of the storage chamber 18 can be reliably reduced by the deformation of the elastic lid 28. In the present embodiment, the pressing portion 32 contacts the elastic lid body 28 and has a curved outer peripheral surface. The central portion of the pressing portion 32 is pressed against the lower surface of the operating body 30 at a position corresponding to the central portion of the accommodating chamber 18 so that the deformed elastic lid 28 can close the opening end on the accommodating chamber 18 side of the through hole 20. It is desirable that a portion 32 be provided. The curvature of the curved outer peripheral surface of the pressing portion 32 is preferably larger than the curvature of the inner peripheral surface of the storage chamber 18.

  FIG. 2 shows a longitudinal sectional view of the nozzle head 10, and FIG. 3 shows a top view of the nozzle head 10. 2 and 3 show a state in which the operation body 30 is opened, so that the elastic lid body 28 that closes the opening of the storage chamber 18 and the pressing portion 32 provided on the lower surface of the operation body 30 are exposed. . In the present embodiment, the operating body 30 is connected to a part of the outer periphery of the upper end of the top portion 16 of the head body 12 by a hinge 34 as a connecting component. The operation body 30 can be connected to any location on the outer periphery of the top end of the top portion 16. Since it is connected by the hinge 34, the operating body 30 can be opened while being connected to the top 16 as shown in FIGS. In addition, when the operating body 30 is closed as shown in FIG. 1, the operating body 30 can be pushed downward except for a portion connected to the top portion 16.

  In the present embodiment, the pressing portion 32 provided on the lower surface of the operation body 30 includes a shaft portion 32a extending from a substantially central portion of the lower surface of the operation body 30 and eight pieces arranged radially from the side surface of the shaft portion 32a. It is comprised by the board | plate material 32b. Each of the plate members 32 b has a curved side extending from the tip of the shaft portion 32 a to the lower surface of the operation body 30. Such curved sides of the plurality of plate members 32b constitute a curved outer peripheral surface of the pressing portion 32 that contacts the elastic lid 28.

(Operation and effect)
The pump dispenser 46 to which the nozzle head 10 configured as described above is attached sucks up the contents from the container body 50 due to the downward displacement of the tube body 40 as the nozzle head 10 is pushed, It can be discharged to a target location through the nozzle cylinder 24.

  For example, as shown in FIG. 4, the pump dispenser 46 to which the nozzle head 10 of the present embodiment is attached pushes the operating body 30 of the nozzle head 10 with one palm, and the contents 54 in the container body 50 are moved to the nozzle. The liquid can be discharged from the nozzle hole 24a of the tube 24 to the palm of the other hand.

  When the operation body 30 of the nozzle head 10 is pushed, the elastic lid body 28 is pressed by the pressing portion 32 and deformed. As a result, the internal volume of the storage chamber 18 whose opening is closed by the elastic lid 28 is reduced. As shown in FIG. 5, the operating body 30 can be pushed in until the deformed elastic lid 28 comes into contact with the inner peripheral surface of the storage chamber 18. At this time, the opening end of the through hole 20 penetrating from the opening of the storage chamber 18 to the inside of the vertical cylinder 14 is closed by the deformed elastic lid 28.

  The pressing portion 32 that presses the elastic lid 28 is provided on the lower surface of the operating body 30, and the operating body 30 covers the top portion 16 so as to be able to be pressed. Therefore, the elastic lid 28 can be reliably pressed and deformed by pushing the operating body 30. Even if any part of the upper surface of the operating body 30 is pushed, the elastic lid can be pushed toward the inside of the storage chamber 18. For example, even when the upper surface of the operating body 30 is pressed with the palm of the hand, the elastic lid 28 is pressed by the pressing portion 32 and deformed. In this way, the internal volume of the storage chamber 18 whose opening is closed by the elastic lid 28 can be reliably reduced.

  When the operating body 30 is further pushed in with the internal volume of the storage chamber 18 reduced and the nozzle head 10 is completely moved downward against the upward biasing force, the inside of the container body 50 is driven by a pump mechanism (not shown). Are sent into the head main body 12 through the tube 40. The contents are discharged from the nozzle hole 24 a of the nozzle cylinder 24 through the discharge flow path 25 of the nozzle cylinder 24 from the inside of the vertical cylinder 14. At this time, the contents in the discharge channel 25 are not necessarily completely discharged from the nozzle hole 24a. Part of the contents may remain in the vicinity of the nozzle hole 24 a or in the discharge flow path 25.

  When the push of the operation body 30 is released after the contents are discharged, the nozzle head 10 moves upward by the upward biasing force acting on the tube body 40. Further, the deformed elastic lid 28 is restored by the restoring force of the elastic lid 28 itself, and the pressing portion 32 is pushed up. In this way, the position of the operating body 30 returns to the state before being pushed (FIG. 1). Since the internal volume of the storage chamber 18 returns to the state before pushing, the internal volume of the storage chamber 18 increases as a result.

  As the internal volume increases in this manner, the inside of the storage chamber 18 whose opening is closed by the elastic lid 28 is negatively pressured, and outside air is sucked from the nozzle hole 24 a through the discharge flow path 25 and the through hole 20. When the elastic lid 28 is greatly deformed and the internal volume of the storage chamber 18 becomes smaller, the degree of negative pressure after releasing the push-in becomes larger. When the elastic lid 28 is sufficiently deformed and the opening end of the through hole 20 on the side of the accommodation chamber 18 is closed, the degree of negative pressure resulting from the release of the pushing of the operating body 30 is maximized.

  When outside air is sucked from the nozzle hole 24a, the contents remaining in the vicinity of the nozzle hole 24a and in the discharge flow path 25 are drawn into the storage chamber 18 from the discharge flow path 25 through the through hole 20 of the top portion 16. . In the nozzle head 10 of the present embodiment, the back suction function is thus manifested, and the contents are prevented from dripping from the nozzle hole 24a. The contents drawn into the storage chamber 18 fall into the container body 50 through the tube body 40.

  In order to develop the back suction function, first, it is necessary to reduce the internal volume of the storage chamber 18 whose opening is closed by the elastic lid 28. As described above, in the present embodiment, the internal volume of the storage chamber 18 can be reliably reduced by simply pushing the operating body 30 that covers the top 16 of the head body 12. The series of operations for discharging the contents from the nozzle hole 24a makes it possible to reliably reduce the internal volume of the storage chamber 18.

  The nozzle head 10 of this embodiment is not required to press down a predetermined portion accurately with a fingertip in order to exhibit a back suction function, and thus operability is not limited. Even when pressed with the palm of the hand, the back suction function is exhibited, so that the nozzle head 10 can be appropriately set without any restrictions on the structure such as the size. Thus, the nozzle head 10 of this embodiment can express a back suction function more reliably with more excellent operability.

(Modification)
The present invention is not limited to the above-described embodiment, and can be appropriately changed within the scope of the gist of the present invention.

  In the above embodiment, the storage chamber 18 provided on the top 16 of the head main body 12 has a shape having a curved inner peripheral surface, but the opening can be closed by the elastic lid 28 and the pressed elastic lid 28. Any structure and size can be provided as long as the inner volume is reduced by deformation.

  The elastic lid 28 that closes the opening of the storage chamber 18 may be made of an elastically deformable material such as various rubber materials, elastomers, and soft resins. The elastic lid 28 is slightly curved upward or downward if it can reduce the internal volume of the storage chamber 18 when pressed and exhibit a back suction function associated with an increase in the internal volume of the storage chamber 18. It is good also as a shape. The elastic lid 28 can also be attached to the top 16 by adhering the lower peripheral edge with an adhesive.

  The operating body 30 having the pressing portion 32 on the lower surface is connected to a part of the outer periphery of the top end of the head body 12 by using a hinge 34 as a connecting part. 30 may be provided so as to be slidable up and down. When the operating body 30 is pushed in, the elastic lid 28 is pressed and deformed by the pressing portion 32 provided on the lower surface of the operating body 30 to reduce the internal volume of the storage chamber 18. As long as the back suction function accompanying the increase can be expressed, the operation body 30 can have an arbitrary structure.

  In the above-described embodiment, the pressing portion 32 is configured by the shaft portion 32a and the plurality of plate members 32b. However, the pressing portion 32 may be configured by a protrusion having an outer peripheral surface curved in a convex shape. The pressing portion 32 only needs to be able to press and deform the elastic lid body 28 to reduce the internal volume of the storage chamber 18 and to exhibit the back suction function associated with the increase of the internal volume of the storage chamber 18. The thickness can be appropriately set.

  In the pressing portion 32 including the shaft portion 32a and the plate material 32b as described above, the plate material 32b arranged radially on the side surface of the shaft portion 32a has a curved shape extending from the tip of the shaft portion 32a to the lower surface of the operation body 30. There is no particular limitation except for this point. The number of plate members 32b can be set as appropriate. One side of the plate member 32 b is not necessarily in contact with the lower surface of the operation body 30. Moreover, the board | substrate material 32b may be provided with the space | gap part penetrated in the thickness direction.

  The vertical cylinder 14 in the head main body 12 of the nozzle head 10 can be connected to the upper end portion of the tube body 40 by an arbitrary method so as to communicate with the tube body 40. For example, the vertical cylinder 14 may be fitted into the upper end portion of the tubular body 40. Alternatively, the vertical cylinder 14 and the tube 40 can be screwed together to connect them.

  In addition, the nozzle cylinder 24 faces upward so that the content remaining in the discharge flow channel 25 is accumulated in the nozzle hole 24a at the distal end and becomes solid matter, so that the distal end is positioned above the base end. It is good also as a shape.

DESCRIPTION OF SYMBOLS 10 Nozzle head 12 Head main body 14 Vertical cylinder 16 Top part 18 Accommodating chamber 20 Through hole 22 Guide cylinder 24 Nozzle cylinder 24a Nozzle hole 25 Discharge flow path 28 Elastic lid body 28a Fitting protrusion 30 Operation body 32 Press part 40 Pipe body 42 Cylinder 44 Cap 50 Container body

Claims (2)

A nozzle head attached to a liquid ejector having a tube body held so as to be able to be pushed into the container body,
A nozzle cylinder communicating with the tube;
A storage chamber formed between the tube and the nozzle tube;
An elastic lid made of a flat plate-like body that makes the internal volume of the storage chamber variable;
An operating body provided so as to be able to push the elastic lid toward the inside of the storage chamber,
The operating body is formed with a pressing part protruding toward the elastic lid ,
The pressing portion has a curved outer peripheral surface that comes into contact with the elastic lid, and the storage chamber has a curved inner peripheral surface,
The curvature of the curved outer peripheral surface is larger than the curvature of the curved inner peripheral surface,
A nozzle head characterized by that. The pressing portion includes a shaft portion extending from a central portion of the lower surface of the operating body, and a plurality of plate members provided radially from a side surface of the shaft portion, and each of the plurality of plate materials is a tip of the shaft portion. nozzle head according to claim 1, characterized by having the curved side extending to a lower surface of the operating body from.

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