JP3216908U - Trigger type pump dispenser - Google Patents

Abstract

A trigger pump dispenser having a back suction function is provided. A trigger-type pump dispenser 10 is mounted on a container body 50 and discharges liquid by operating a swinging portion 44. The tube body 30 is held so as to be pushed into the container body 50, and the tube body 30 A nozzle cylinder 22 communicating with the tube body 30, a storage chamber 18 formed between the tube body 30 and the nozzle cylinder 22, and an elastic lid body 28 that can change the internal volume of the storage chamber 18. A pressing portion 48 that is provided so as to cover the elastic lid 28 and protrudes toward the elastic lid 28 is formed. [Selection] Figure 1

Description

  The present invention relates to a trigger-type pump dispenser that discharges contents such as liquid contained in a container body by operating a swinging portion.

  As the pump dispenser, there are known a push-down type in which the push-down head is pushed down to discharge the content from the nozzle, and a so-called trigger type in which the lever as a swinging part is grasped and the content is discharged from the nozzle.

  In the push-down type pump dispenser, in order to prevent the contents from dripping from the tip of the nozzle, a back suction function for sucking the contents remaining in the nozzle into the pump body is provided. It is disclosed that the contents remaining in the nozzle can be pulled back more completely by attaching an elastic cap to the upper end of the pressing head (for example, Patent Document 1).

Japanese Utility Model Publication No. 2-70755

  However, in the case of the above-mentioned patent document 1, although a back suction function can be given to a push-down pump dispenser having a push-down head, the function cannot be applied to a trigger-type pump dispenser.

  The back suction function is required not only in the push-down type pump dispenser but also in the trigger type pump dispenser.

  Accordingly, an object of the present invention is to provide a trigger type pump dispenser having a back suction function.

  A trigger-type pump dispenser according to the present invention is a trigger-type pump dispenser that is attached to a container body and discharges liquid by operating a swinging portion, and is a tube body that is held so as to be pushed into the container body. A nozzle cylinder that communicates with a tubular body, a storage chamber formed between the tubular body and the nozzle cylinder, and an elastic lid that makes the internal volume of the storage chamber variable. A pressing portion that is provided so as to cover the elastic lid and protrudes toward the elastic lid is formed.

  According to the present invention, the trigger type pump dispenser has a storage chamber whose internal volume is variable by deformation of the elastic lid. By pressing and deforming the elastic lid by the pressing portion, the internal volume of the storage chamber is reduced. 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 swinging portion of the trigger type pump dispenser. When the swinging portion swings, the pressing portion pushes the elastic lid toward the inside of the storage chamber. Therefore, the internal volume of the storage chamber can be reduced by swinging the swinging portion and pressing the elastic lid with the pressing portion. Thus, the trigger type pump dispenser of the present embodiment can exhibit a back suction function.

It is a fragmentary sectional view which shows the structure of the trigger type pump dispenser which concerns on this embodiment. It is a longitudinal cross-sectional view of the liquid flow part in the trigger type pump dispenser which concerns on this embodiment. It is a fragmentary sectional view of the operation part in the trigger type pump dispenser concerning this embodiment. It is a fragmentary sectional view explaining the state where the elastic lid in the trigger type pump dispenser concerning this embodiment was pressed and changed. It is a fragmentary sectional view which shows the structure of the trigger type pump dispenser which concerns on a modification (1). It is a fragmentary sectional view explaining the state where the elastic lid in the trigger type pump dispenser concerning modification (1) was pressed and changed. It is a fragmentary sectional view showing composition of a trigger type pump dispenser concerning a modification (2). It is a fragmentary sectional view explaining the state where the elastic lid in the trigger type pump dispenser concerning a modification (2) was pressed and changed.

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

(overall structure)
For example, as shown in FIG. 1, the trigger type pump dispenser 10 of the present embodiment is attached to a container main body 50 that stores contents such as a liquid, and discharges the contents stored in the container main body 50. it can. As illustrated, the trigger pump dispenser 10 can be attached to the container body 50 via a cap 32.

  In the trigger type pump dispenser 10, a cylinder 34 is provided through the top surface of the cap 32. A tube body 30 held by the vertical cylinder 14 is inserted into the cylinder 34. The tube body 30 is biased upward by a biasing means such as a compression coil spring (not shown). The vertical cylinder 14 communicates with a nozzle cylinder 22 for discharging the contents.

  The vertical cylinder 14 and the nozzle cylinder 22 constitute a part of the liquid passing section 12 as shown in FIG. A storage chamber 18 is provided at the top 16 of the liquid passing portion 12 which is the upper end of the vertical cylinder 14. Since the storage chamber 18 communicates with the inside of the vertical cylinder 14 through the through-hole 20, in the trigger type pump dispenser 10, the storage chamber 18 is located between the tube body 30 and the nozzle cylinder 22. Become.

  As shown in FIG. 1, the vertical cylinder 14 is connected to the tubular body 30 by being externally fitted to the upper end portion of the tubular body 30. Since the vertical cylinder 14 is thus connected to the upper end portion of the tubular body 30, in the trigger type pump dispenser 10 of the present embodiment, the liquid passing portion 12 is pushed down to resist the upward biasing force. The tube body 30 can be pushed into the container body 50. The pressing of the liquid passing part 12 will be described later.

  The nozzle cylinder 22 has an elongated shape that is slightly inclined upward from the proximal end portion toward the distal end portion. The nozzle cylinder 22 has a discharge flow path 24 communicating with the inside of the vertical cylinder 14. Accordingly, the nozzle cylinder 22 can communicate with the tube body 30 via the vertical cylinder 14.

  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 22a through the through hole 20 and the outflow path 24.

  The opening of the storage chamber 18 is closed by an elastic lid 28. In the present embodiment, the elastic lid body 28 has an upwardly curved shape made of a rubber material, and has a fitting protrusion 28a at the lower peripheral edge. The elastic lid body 28 is attached to the top portion 16 by fitting the fitting protrusion 28 a at the lower peripheral edge into the receiving hole 17 (see FIG. 2) of the top portion 16.

  As will be described later, the elastic lid 28 can be deformed by being pressed by the pressing portion 48, 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.

  A swinging portion 44 is provided so as to cover the elastic lid 28. The swing part 44 has a grip lever 45 at the tip. The swinging part 44 is a part of the operation part 40 as shown in FIG. The operation unit 40 includes a cap 32 through which the cylinder 34 penetrates the top surface, and a fixed portion 42 fixed to the cylinder 34 and the cap 32 on one side of the outer peripheral surface of the cylinder 34. The swing part 44 is connected to such a fixed part 42 by a connecting part 46 such as a hinge so as to be swingable. FIG. 3 shows a state where the swinging portion 44 in FIG. 1 is fully opened. In the trigger type pump dispenser 10 of the present embodiment, the fixing portion 42 of the operation portion 40 is fixed to the cap 32 and the cylinder 34 so as to be opposite to the nozzle cylinder 22 with the cylinder 34 and the vertical cylinder 14 interposed therebetween. ing. Therefore, the swinging portion 44 can swing on the same side as the nozzle cylinder 22.

  As shown in FIG. 1, the swinging portion 44 is formed with a pressing portion 48 that protrudes toward the elastic lid body 28 that closes the opening of the storage chamber 18. In the present embodiment, the pressing portion 48 is constituted by a convex portion formed integrally with the swinging portion 44. When the elastic lid body 28 is pressed by the pressing portion 48, the elastic lid body 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 48 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 48 contacts the elastic lid 28 and has a curved outer peripheral surface. The central portion of the pressing portion 48 is positioned on the lower surface of the swinging portion 44 at a position corresponding to the central portion of the storage chamber 18 so that the deformed elastic lid 28 can close the open end of the through hole 20 on the storage chamber 18 side. It is desirable that the pressing portion 48 is provided. The curvature of the curved outer peripheral surface of the pressing portion 48 is preferably larger than the curvature of the inner peripheral surface of the storage chamber 18.

(Operation and effect)
The trigger type pump dispenser 10 configured as described above sucks the contents from the container body 50 by the downward displacement of the tube body 30 in accordance with the operation of the swinging portion 44, and draws the sucked contents into the nozzle cylinder 22. And can be discharged to a target location.

  As the swinging portion 44 swings in the direction of arrow A, the elastic lid 28 is pressed by the pressing portion 48 and deformed. The swing portion 44 can be swung by gripping the grip lever 45 toward the cylinder 34. When the elastic lid 28 is deformed, the internal volume of the storage chamber 18 whose opening is closed by the elastic lid 28 is reduced. As shown in FIG. 4, the swinging portion 44 can be swung 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. In addition to the pressing portion 48 being in contact with the elastic lid body 28, the inner surface of the swinging portion 44 in the vicinity of the pressing portion 48 is in contact with a part of the top portion 16 of the liquid passing portion 12 and moves downward. 12 is pushed down.

  In the middle of the process so far, the contents are discharged from the nozzle hole 22 a of the nozzle cylinder 22. Specifically, by grasping the grip lever 45 toward the cylinder 34 and swinging the swinging portion 44, the liquid passing portion 12 moves downward as described above. By such movement of the liquid passing portion 12, the tube body 30 is pushed into the container body 50 against the upward biasing force.

  The contents inside the container main body 50 are sent into the liquid passing part 12 through the pipe body 30 by a pump mechanism (not shown). Further, the contents are discharged from the nozzle hole 22 a of the nozzle cylinder 22 through the discharge flow path 24 of the nozzle cylinder 22 from the inside of the vertical cylinder 14. At this time, the contents in the discharge channel 24 are not necessarily completely discharged from the nozzle hole 22a. Part of the contents may remain in the vicinity of the nozzle hole 22 a or in the discharge flow path 24.

  In the present embodiment, the pressing portion 48 that presses the elastic lid 28 is provided on the lower surface of the swinging portion 44, and the swinging portion 44 covers the top portion 16 of the liquid passing portion 12. Therefore, by swinging the swinging portion 44, the elastic lid 28 can be pressed and deformed.

  After the contents are discharged from the nozzle hole 22a, when the grip lever 45 is released, the inner surface of the swinging portion 44 is separated from the top portion 16 of the liquid passing portion 12, and the upward biasing force acting on the tube body 30. As a result, the liquid passing part 12 moves upward. Further, the deformed elastic lid 28 is restored by the restoring force of the elastic lid 28 itself, and the pressing portion 48 is pushed up. Thus, the position of the swinging portion 44 returns to the state before the grip lever 45 is gripped (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 becomes negative pressure, and outside air is sucked from the nozzle hole 22 a through the discharge flow path 24 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 grip 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 due to the release of the grip lever 45 is maximized.

  When the outside air is sucked from the nozzle hole 22a, the contents remaining in the vicinity of the nozzle hole 22a and in the discharge flow path 24 are drawn into the storage chamber 18 from the discharge flow path 24 through the through hole 20 of the top portion 16. . In the trigger type pump dispenser 10 of the present embodiment, the back suction function is thus expressed and the contents are prevented from dripping from the nozzle hole 22a. The contents drawn into the storage chamber 18 fall into the container main body 50 through the tube body 30.

  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 storage chamber 18 is provided at the top portion 16 of the liquid passage portion 12, and the grip lever 45 of the swinging portion 44 that covers the top portion 16 of the liquid passage portion 12 is gripped. Thus, the internal volume of the storage chamber 18 can be reduced.

  In the trigger type pump dispenser 10 of the present embodiment, since the elastic cover 28 is pushed down and moved downward in the liquid passing portion 12 by a single operation of the swinging portion 44, the nozzle hole It has become possible to reduce the internal volume of the storage chamber 18 by a series of operations for discharging the contents from 22a and to develop the back suction function.

(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 liquid passing portion 12 has a shape having a curved inner peripheral surface, but the opening can be closed by the elastic lid 28 and the elastic lid pressed. As long as the inner volume is reduced by deforming 28, it can be provided in any shape and size.

  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 flat or slightly curved downward if it can reduce the internal volume of the storage chamber 18 when pressed and can exhibit the back suction function accompanying the increase of 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 pressing portion 48 provided in the swinging portion 44 presses and deforms the elastic lid body 28 to reduce the internal volume of the storage chamber 18, and develops a back suction function accompanying an increase in the internal volume of the storage chamber 18. If possible, the shape, size, etc. can be set as appropriate. For example, the protrusion may be provided as a separate protrusion from the swinging part 44 by bonding to the inner surface of the swinging part 44 with an adhesive or the like.

  The vertical cylinder 14 in the liquid passing portion 12 can be connected to the upper end portion of the tubular body 30 by an arbitrary method so as to communicate with the tubular body 30. For example, the vertical cylinder 14 may be fitted into the upper end portion of the tubular body 30. Alternatively, it is possible to connect the vertical cylinder 14 and the tubular body 30 by screwing them together.

  Further, the nozzle cylinder 22 may have the same height at the distal end portion and the proximal end portion. In some cases, the nozzle cylinder 22 may be formed in an elongated shape that extends substantially horizontally to the outside of the liquid passing portion 12 and has its tip end slightly bent downward.

  If the elastic lid 28 is pressed by the pressing portion 48 provided on the swinging portion 44 and the internal volume of the accommodating portion 18 of the top portion 16 of the liquid passing portion 12 can be reduced, the operation portion 40 has an arbitrary configuration. can do.

  For example, as shown in the trigger-type pump dispenser 10A in FIG. 5, the operation portion may be configured by fixing the fixing portion 42A to the cap 32 and the cylinder 34 so as to be on the same side as the nozzle cylinder 22. A swinging portion 44A is provided for the fixed portion 42A so as to be swingable on the opposite side of the nozzle tube 22 across the cylinder 34 and the vertical tube 14 (Modification (1)). By grasping the grip lever 45A at the tip of the swing part 44A toward the cylinder 34, the swing part 44A swings in the direction of arrow B in the figure. The elastic lid 28 can be pressed by the pressing portion 48A as shown in FIG. 6 by the same mechanism as described above except that the swinging direction of the swinging portion 44A is different.

  Alternatively, as shown in the trigger type pump dispenser 10B in FIG. 7, the swinging portion 44B in the operation portion may swing in the direction of arrow C by grasping the grip lever 45B at the tip downward ( Modification (2)). In this case, the fixing portion 42 </ b> B is fixed to the cap 32 and the cylinder 34 so as to be on the same side as the nozzle cylinder 22. On the opposite side of the fixing portion 42B, the finger hooking portion 42C is fixed to the cap 32 and the cylinder 34. Further, a swinging portion 44B is provided with respect to the fixed portion 42B so as to be swingable on the opposite side of the nozzle cylinder 22. By grasping the grip lever 45B, the swinging portion 44B swings in the direction of arrow C in the figure. Except that the swinging direction of the swinging part 44B is different, the elastic lid 28 can be pressed by the pressing part 48B as shown in FIG. 8 by the same mechanism as described above.

  The triggers of the modified example (1) and the modified example (2) are provided by providing the pressing parts 48A and 48B on the swinging parts 44A and 44B so that the elastic lid body 28 of the top part 16 of the liquid passing part 12 can be pressed. Also in the type pump dispensers 10A and 10B, it is possible to reduce the internal volume of the storage chamber 18 by a series of operations for discharging the contents from the nozzle holes 22a and to develop the back suction function.

10, 10A, 10B Trigger type pump dispenser 12 Fluid passage part 14 Vertical cylinder 16 Top part 17 Receiving hole 18 Accommodating chamber 20 Through hole 22 Nozzle cylinder 22a Nozzle hole 24 Discharge flow path 28 Elastic lid 28a Fitting protrusion 30 Tube 32 Cap 34 Cylinder 40 Operation part 42, 42A, 42B Fixed part 42C Finger hook part 44, 44A, 44B Oscillating part 45, 45A, 45B Grip lever 48, 48A, 48B Press part 50 Container body

Claims (5)

A trigger-type pump dispenser that is attached to the container body and discharges liquid by operating the swinging part,
A tubular 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 that makes the internal volume of the storage chamber variable,
The trigger-type pump dispenser, wherein the swinging portion is provided so as to cover the elastic lid, and a pressing portion protruding toward the elastic lid is formed.   The trigger-type pump dispenser according to claim 1, wherein the elastic lid body is curved toward the pressing portion.   The trigger type pump dispenser according to claim 1 or 2, wherein the pressing portion has a curved outer peripheral surface that comes into contact with the elastic lid.   The trigger type pump dispenser according to claim 1, wherein the storage chamber has a curved inner peripheral surface. The curved inner peripheral surface of the storage chamber has a first curvature;
The trigger type pump dispenser according to claim 4, wherein the curved outer peripheral surface of the pressing portion has a second curvature larger than the first curvature.

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