Ejector

Abstract

We provide a pump-type dispenser with a simple structure. [Solution] The discharger (20) comprises a cap portion (21) attached to the opening portion (11d), a pump portion (26) for pressurizing the contents inside the cylinder (36), and a discharge port (41d), and is equipped with a pressing operation member (22). The pressing operation member (22) is formed in a dome shape that covers the cap portion (21) from above and comprises a dome portion (40) that is elastically deformed by a pressing force (F) and returns to its original state when the pressing force (F) is released, and a piston (41) that extends downward from the center (40a) of the dome portion (40) and fits into the cylinder (36), and pressurizes the contents when pressed. The cap portion (21) is equipped with an elastic piece (34) located below the dome portion (40) around the piston (41). The elastic piece (34) is elastically deformed when pressed by the dome portion (40) which is elastically deformed by the pressing force (F), and returns to its original state when the pressing force (F) is released.

Description

Technical Field

[0001] The present invention relates to a discharger.

Background Art

[0002] Conventionally, high-viscosity contents such as hand cream have been stored in tube containers, but in recent years, an increasing number of high-viscosity contents are stored in bottles such as blow bottles. However, when high-viscosity contents are stored in a bottle, it is difficult to discharge the contents even when the bottle is placed in an inverted position. Furthermore, even if the bottle is of a squeeze discharge type, it becomes difficult to use up all the contents, resulting in residual contents remaining in the bottle. To reduce the residual amount of contents, it is considered effective to use a pump-type discharger as disclosed in, for example, Patent Document 1. The discharger of Patent Document 1 includes a cap portion attached to the mouth of a container, a piston, a pressing operation member for operating the piston, a spring for pushing back the pressing operation member, and the like.

Prior Art Literature

Patent Literature

[0003]

Patent Document 1

Summary of the Invention

Problem to be Solved by the Invention

[0004] However, when a discharger is of a pump type, the number of components increases, and the structure tends to be complicated. For example, in the discharger of Patent Document 1, the piston and the spring are provided as separate components from the cap portion and the pressing operation member, respectively, resulting in a complicated structure.

[0005] In view of the foregoing, an object of the present invention is to provide a pump-type discharger with a simple structure.

Means for Solving the Problem

[0006] The discharger comprises a cap portion attached to the mouth of a container containing contents, a pump portion which pumps the contents in the cylinder by a piston that moves inside the cylinder, and a discharge port for discharging the contents, and includes a pressing operating member which is pressed, the pressing operating member being formed in a dome shape that covers the cap portion from above and elastically deforms under the pressing force of the pressing operation and returns to its original state when the pressing force is released, and the piston which extends downward from the center of the dome portion and fits into the cylinder and pumps the contents under the pressing operation, the cap portion being provided with an elastic piece located around the piston and below the dome portion, the elastic piece being elastically deformed when pressed by the dome portion which is elastically deformed under the pressing force and returns to its original state when the pressing force is released. [Effects of the Invention]

[0007] According to the present invention, a pump-type discharger with a simple structure can be provided. [Brief explanation of the drawing]

[0008] [Figure 1] This is a cross-sectional view showing a container with a dispenser attached. [Figure 2] This is a perspective view of the cap component from above. [Modes for carrying out the invention]

[0009] Hereinafter, an embodiment of the discharger according to the present invention will be described with reference to the drawings. In this specification, the vertical direction is the direction along the illustrated axis O (the central axis of the cap member 21, which will be described later), where the side where the pressing operation member 22 is located is "up" and the side where the pipe 25 is located is "down". The radial direction is the direction perpendicular to axis O in a plane perpendicular to axis O, and the circumferential direction is the direction of rotation around axis O in this plane.

[0010] Figure 1 is a cross-sectional view showing a container 10 with a dispensing device 20 attached. The right half of Figure 1 shows the dispensing device 20 in a state where it is not being pressed, while the left half of Figure 1 shows the dispensing device 20 in a state where it is being pressed. Container 10 is a container for holding contents (liquids) with high viscosity, such as hand cream.

[0011] The container 10 is a so-called double-walled container (sometimes called a delaminated container or a laminated peel-off container), comprising an outer layer 11 and a container-shaped inner layer 12 housed inside the outer layer 11 along its inner surface.

[0012] The outer layer 11 is bottle-shaped and comprises a container bottom wall 11a, a cylindrical body portion 11b extending upward from the periphery of the container bottom wall 11a, a shoulder portion 11c extending radially inward and upward from the upper end of the body portion 11b, and a cylindrical mouth portion 11d extending upward from the central part of the shoulder portion 11c in a plan view. A discharger engagement portion 11e is provided on the outer circumference of the opening portion 11d, into which the discharger 20 engages. The discharger engagement portion 11e is a male threaded portion. Figure 1 shows the container 10 in an upright position, with the central axis of the opening 11d coinciding with axis O.

[0013] The inner layer 12 is made of a thinner synthetic resin than the outer layer 11 and is deformable to reduce its volume. The space inside the inner layer 12 is a storage space 12a for containing the contents.

[0014] Air can flow between the outer layer 11 and the inner layer 12 through an outside air inlet (not shown) provided in the outer layer 11. When the contents of the containment space 12a are discharged to the outside, the inner layer 12 deforms in volume while the shape of the outer layer 11 is maintained, and air is drawn in between the outer layer 11 and the inner layer 12 through the outside air inlet. The outside air inlet is provided, for example, in the mouth 11d or the bottom wall 11a of the container.

[0015] The discharger 20 includes a cap member 21 (cap portion) attached to the mouth portion 11d, a pressing operation member 22 attached to the cap member 21 so as to cover the cap member 21 from above, a valve member 23 attached to the cap member 21, an upper cover 24 covering the pressing operation member 22 from above, and a pipe 25 connected to the lower end portion of the cap member 21.

[0016] Figure 2 is a perspective view of the cap member 21 as viewed from the upper side. The cap member 21 includes a cylindrical cap body 30 attached to the outer periphery of the mouth portion 11d, a disk-shaped cap top surface portion 31 extending radially outward from the upper end portion of the cap body 30, and a cylindrical cap peripheral wall portion 32 extending downward from the peripheral edge portion of the cap top surface portion 31. Further, the cap member 21 includes an annular support wall 33 extending upward from the peripheral edge portion of the cap top surface portion 31, and a plurality of elastic pieces 34 extending upward from the cap top surface portion 31 inside the support wall 33.

[0017] Furthermore, the cap member 21 includes an annular connection portion 35 extending radially inward from the upper end portion of the cap body 30, a cylinder 36 extending downward from the connection portion 35 and disposed inside the mouth portion 11d, a cylinder bottom wall portion 37 forming the bottom surface of the cylinder 36, and a cylindrical pipe connection portion 38 extending downward from the cylinder bottom wall portion 37.

[0018] An inner peripheral engagement portion 30a that engages with the discharger engagement portion 11e is provided on the inner periphery of the cap body 30. The inner peripheral engagement portion 30a is a female screw portion. The axis O is the central axis of the cylindrical cap body 30. The discharger 20 is attached to the container 10 when the inner peripheral engagement portion 30a of the cap body 30 is screwed onto the discharger engagement portion 11e of the mouth portion 11d and the connection portion 35 is pressed against the upper end portion of the mouth portion 11d. An annular seal member 39 is interposed between the lower surface of the connection portion 35 and the upper surface of the mouth portion 11d.

[0019] The cylinder 36 is a cylindrical body that is disposed coaxially with the axis O and opens upward, and is surrounded by the mouth portion 11d. A hole 37a penetrating through the cylinder bottom wall portion 37 is provided at the central portion of the cylinder bottom wall portion 37. The pipe connection portion 38 communicates with the inside of the cylinder 36 via the hole 37a. The lower end of the pipe connection portion 38 is located in the accommodation space 12a below the mouth portion 11d.

[0020] The cap top surface portion 31 is in the form of a plate extending horizontally around the mouth portion 11d, and covers and hides the shoulder portion 11c from above. The cap peripheral wall portion 32 is in a cylindrical shape surrounding the cap body 30 from the periphery. The outer peripheral surface of the cap peripheral wall portion 32 is flush with the outer peripheral surface of the upper end portion of the body portion 11b, and the lower end of the cap peripheral wall portion 32 is close to the upper surface of the body portion 11b.

[0021] The support wall 33 is in an annular shape centered on the axis O in a plan view. The support wall 33 is arranged radially inward of the cap peripheral wall portion 32. A locking protrusion 33a is provided on the inner peripheral surface of the upper portion of the support wall 33. A plurality of the locking protrusions 33a are provided at equal intervals in the circumferential direction of the cap member 21 (eight locations in the present embodiment).

[0022] The elastic piece 34 extends radially inward toward the axis O from the cap top surface portion 31 and further upward. The elastic piece 34 is arranged radially inward with respect to the support wall 33 and is surrounded by the support wall 33. A plurality of the elastic pieces 34 are provided (eight locations in the present embodiment) so as to form an annular arrangement spaced apart from each other in the circumferential direction of the cap member 21.

[0023] The base end portion 34a of the elastic piece 34 is located on the support wall 33 side, and the distal end portion 34b of the elastic piece 34 is located on the axis O side. The elastic piece 34 is in the form of a plate extending obliquely from the base end portion 34a toward the distal end portion 34b. In a plan view from above, the elastic piece 34 is in a trapezoidal shape tapering from the base end portion 34a toward the distal end portion 34b. The locking protrusions 33a are provided in the same number as the elastic pieces 34, are arranged at the same positions as the elastic pieces 34 in the circumferential direction, and overlap the elastic pieces 34 from the radially outer side.

[0024] The elastic piece 34 is formed by cutting and bending a portion of the cap top surface 31 upward, starting from the base end 34a, and an opening 31a is formed directly below the elastic piece 34 on the cap top surface 31, in accordance with the shape of the elastic piece 34.

[0025] The cap member 21 is made of synthetic resin and integrally comprises a cap body 30, a cap top surface 31, a cap peripheral wall 32, a support wall 33, an elastic piece 34, a connecting part 35, a cylinder 36, a cylinder bottom wall 37, and a pipe connecting part 38.

[0026] The valve member 23 is positioned at the bottom of the cylinder 36. The valve member 23 comprises a ring-shaped base 23a, a valve body 23b positioned inside the base 23a, and a plurality of elastic parts 23c that connect the valve body 23b and the base 23a in the radial direction. Multiple elastic parts 23c are provided spaced apart from each other in the circumferential direction. In the valve member 23, the portion between the base 23a and the valve body 23b, and between adjacent elastic parts 23c, is an opening through which the contents can pass.

[0027] The valve member 23 is fixed to the cylinder 36 by having its base 23a supported by the cylinder bottom wall 37 and by fitting its base 23a to the inner circumferential surface of the cylinder 36. The valve body 23b abuts against the peripheral edge of the hole 37a in the cylinder bottom wall 37 from above, thereby blocking the hole 37a. When the pressure inside cylinder 36 becomes lower than the pressure in the containment space 12a, this pressure difference causes the valve body 23b to rise while pulling the elastic part 23c, and the valve body 23b separates from the cylinder bottom wall 37, opening the hole 37a. When the pressure inside cylinder 36 becomes equal to the pressure in the containment space 12a, the valve body 23b descends due to the restoring force of the elastic part 23c and closes the hole 37a.

[0028] The pipe 25 is fixed to the pipe connection part 38 by fitting it into the inner circumference of the pipe connection part 38. The pipe 25 extends to the lower end of the storage space 12a.

[0029] The upper cover 24 comprises a cover upper surface portion 24a that covers the pressing operation member 22 from above, and a cylindrical cover peripheral wall portion 24b that extends downward from the peripheral edge of the cover upper surface portion 24a. The upper cover 24 is attached to the cap member 21 by the lower end of the cover peripheral wall portion 24b engaging with the outer circumferential surface of the support wall 33. The upper cover 24 may also be connected to the cap member 21 by a hinge so as to be openable and closable.

[0030] The pressing operation member 22 comprises a dome-shaped dome portion 40 that covers the cap member 21 from above, and a piston 41 that extends downward from the center 40a of the dome portion 40 in a plan view and fits into the cylinder 36. The pressing operation member 22 has a dome portion 40 and a piston 41 integrally formed, and is made of, for example, elastomer.

[0031] The dome portion 40 is formed in a circular shape when viewed from above, and in a side view as shown in Figure 1, it is formed in an upwardly convex arc shape. The dome portion 40 is attached to the upper surface of the cap member 21 and covers the cap top surface 31 from above. In detail, the dome portion 40 is attached to the upper surface of the cap member 21 by fitting its peripheral edge 40b into the inner circumferential surface of the support wall 33, and by engaging the peripheral edge 40b between the locking projection 33a and the upper surface of the cap top portion 31.

[0032] The dome portion 40 is formed such that its outer diameter decreases and its height increases from the peripheral edge 40b towards the center 40a. As a result, the distance between the lower surface 40c of the dome portion 40 and the upper surface of the cap top portion 31 increases from the peripheral edge 40b towards the center 40a.

[0033] The piston 41 includes a cylindrical portion 41a that extends downward from the central part 40a and fits into the cylinder 36, and a piston upper surface portion 41b that closes the upper surface of the cylindrical portion 41a. The inside of the cylindrical portion 41a is a discharge passage 41c through which the contents can pass.

[0034] The piston upper surface portion 41b constitutes the upper surface of the pressing operation member 22 at its central point 40a. A slit 41d (discharge port) is formed in the piston upper surface portion 41b, penetrating it vertically. In Figure 1, the shape of the slit 41d in a plan view is shown above the upper cover 24. The slit 41d is an elongated cut extending radially from the dome portion 40, penetrating the piston upper surface portion 41b.

[0035] The piston 41, cylinder 36, and valve member 23 constitute a pump unit 26 that pumps the contents inside the cylinder 36 by the piston 41 moving inside the cylinder 36.

[0036] The elastic piece 34 of the cap member 21 is located below the dome portion 40 and is covered from above by the dome portion 40. In detail, as shown in the right-hand portion of Figure 1, when the dome portion 40 is not being pressed, the elastic piece 34 extends diagonally along the lower surface 40c of the dome portion 40 from the peripheral edge 40b towards the central part 40a and upward. The upper surface of the elastic piece 34 abuts against the lower surface 40c of the dome portion 40, holding the dome portion 40 in place. The tip 34b of the elastic piece 34 is located in the radial middle of the dome portion 40, and no elastic piece 34 is provided radially inward from the tip 34b.

[0037] Here, we will explain an example of the procedure for discharging the contents by pressing the pressing operation member 22. First, the user removes the upper cover 24 from the cap member 21, exposing the pressing operation member 22. Next, the user applies downward pressure to the upper part of the dome portion 40 with their finger or the like, applying a downward pressing force F (see the left side of Figure 1) to the dome portion 40. As a result, the dome portion 40 elastically deforms downward due to the pressing force F, and the piston 41 moves downward together with the dome portion 40, moving from the top to the bottom of the cylinder 36. At this time, since the hole 37a in the cylinder bottom wall portion 37 is blocked by the valve body 23b, the inside of the cylinder 36 is pressurized by the descending piston 41. Therefore, the pressurized air inside the cylinder 36 (or the pressurized contents if the contents have already been discharged and the contents are contained inside the cylinder 36) is discharged from inside the cylinder 36 through the discharge passage 41c and out of the discharge port, the slit 41d, above the pressing operation member 22.

[0038] In detail, the slit 41d is closed when not being pressed. As the piston 41 descends due to the pressing operation, the upper surface portion 41b of the piston elastically deforms so that the width of the slit 41d increases, and the slit 41d opens. In this way, since the slit 41d opens in conjunction with the pressing operation, the contents can be discharged from the slit 41d by the pressing operation.

[0039] Furthermore, when a pressing operation is performed, the elastic piece 34 is pressed by the dome portion 40, which has been elastically deformed by the pressing force F, and elastically deforms downward together with the dome portion 40. Specifically, the elastic piece 34 elastically deforms to follow the lower surface 40c of the dome portion 40, and bends in an arc shape such that the tip portion 34b is lower than the intermediate portion located between the base portion 34a and the tip portion 34b of the elastic piece 34.

[0040] Furthermore, when a pressing operation is performed, the air between the dome portion 40 and the cap top portion 31 is pushed by the dome portion 40, moves through the opening 31a of the cap top portion 31 to the space inside the cap peripheral wall portion 32, and can escape to the outside through the gap between the lower end of the cap peripheral wall portion 32 and the shoulder portion 11c.

[0041] When the user stops pressing and releases the pressing force F, the elastically deformed dome portion 40 returns to its original state, and the piston 41 moves upward together with the dome portion 40, moving from the bottom to the top of the cylinder 36. As a result, the volume inside the cylinder 36 increases and the pressure inside the cylinder 36 decreases, and the pressure in the containment space 12a becomes higher than the pressure inside the cylinder 36. Due to this pressure difference, the valve body 23b rises, opening the hole 37a in the cylinder bottom wall portion 37, and the contents of the containment space 12a flow into the cylinder 36 through the pipe 25 and the hole 37a. When the above pressure difference disappears, the valve body 23b descends due to the return of the elastic portion 23c, closing the hole 37a.

[0042] Furthermore, when the pressing force F is released, the elastically deformed elastic piece 34 returns to its original shape, pushing the dome portion 40 upward and assisting in its restoration. As a result, the dome portion 40 can be restored properly.

[0043] Furthermore, when the pressing force F is released, the piston upper surface 41b elastically deforms as the dome portion 40 rises, reducing the width of the slit 41d, and the slit 41d is closed. Furthermore, as the contents are discharged, air is drawn in between the outer layer 11 and the inner layer 12 through the air intake, preventing the outer layer 11 from deforming along with the inner layer 12, which undergoes volume reduction and deformation.

[0044] Subsequently, when the dome portion 40 is pressed again, the inside of the cylinder 36 is pressurized, and the contents inside the cylinder 36 are discharged from the slit 41d. In this way, by repeatedly pressing and releasing the dome portion 40, the contents of the containment space 12a can be discharged from the slit 41d.

[0045] As described above, according to an embodiment to which the present invention is applied, the discharger 20 comprises a cap member 21 attached to the mouth portion 11d of a container 10 containing contents, a pump portion 26 that pumps the contents inside the cylinder 36 by a piston 41 that moves inside the cylinder 36, and a slit 41d as a discharge port for discharging the contents. The discharger 20 comprises a pressing operating member 22 that is pressed, and the pressing operating member 22 comprises a dome portion 40 formed in a dome shape that covers the cap member 21 from above, which is elastically deformed by the pressing force F from the pressing operation and returns to its original state when the pressing force F is released, and a piston 41 that extends downward from the center 40a of the dome portion 40 and fits into the cylinder 36, and pumps the contents by the pressing operation. The cap member 21 comprises an elastic piece 34 located below the dome portion 40 around the piston 41, and the elastic piece 34 is elastically deformed when pressed by the dome portion 40 which is elastically deformed by the pressing force F, and returns to its original state when the pressing force F is released. With this configuration, the piston 41 that pumps the contents by pressing extends downward from the center 40a of the dome portion 40 and fits into the cylinder 36, thus simplifying the structure of the pump portion 26 and the pressing operating member 22. Furthermore, the elastic piece 34 of the cap member 21 is elastically deformed when pressed by the dome portion 40 and can assist in the restoration of the dome portion 40 when it returns to its original state after the pressing force F is released. For this reason, there is no need to provide a separate part such as a spring to restore the dome portion 40, thus simplifying the structure of the discharger 20.

[0046] Furthermore, the discharge port is a slit 41d that penetrates the upper part of the pressing operation member 22 and communicates with the inside of the piston 41. The slit 41d is closed when no pressing operation is performed and opens when a pressing operation is performed. With this configuration, the discharge port is made of a slit 41d that penetrates the upper part of the pressing operating member 22 and communicates with the inside of the piston 41, allowing the discharge port to be provided with a simple structure. In addition, the slit 41d can be opened and closed in conjunction with the pressing operation, making it easy to use.

[0047] Furthermore, the cap member 21 comprises a cylindrical cap body 30 that engages with the outer circumference of the mouth portion 11d, and a cap top portion 31 that extends radially outward from the cap body 30 and covers the shoulder portion 11c of the container 10 from above, and the elastic piece 34 extends upward from the cap top portion 31. With this configuration, the elastic piece 34 can be provided with a simple structure by utilizing the cap top surface 31 that covers the shoulder portion 11c of the container 10 from above.

[0048] Furthermore, the elastic piece 34 is plate-shaped and extends along the lower surface 40c of the dome portion 40 from the peripheral edge 40b side to the central part 40a side of the dome portion 40. With this configuration, the elastic piece 34 is plate-shaped and extends along the lower surface 40c of the dome portion 40 from the peripheral edge 40b side to the central part 40a side of the dome portion 40. Therefore, when restoring, it can effectively push back the dome portion 40, and the dome portion 40 can be restored well.

[0049] Furthermore, multiple elastic pieces 34 are provided around the cap member 21 at intervals from each other. With this configuration, multiple elastic pieces 34 are provided around the cap member 21 at intervals from each other, allowing for appropriate rigidity of each elastic piece 34 and facilitating pressing operations. Furthermore, the dome portion 40 can be uniformly restored by the multiple elastic pieces 34.

[0050] Furthermore, the cap member 21 includes a cylindrical cap body 30 that engages with the outer circumference of the opening 11d, an annular connecting portion 35 that extends radially inward from the upper end of the cap body 30, and a cylinder 36 that extends downward from the connecting portion 35 and is positioned inside the opening 11d. With this configuration, the piston 41 extending downward from the central part 40a of the dome portion 40 fits into the cylinder 36 provided within the opening portion 11d of the cap member 21, thus simplifying the structure of the pump portion 26.

[0051] Although one embodiment of the present invention has been described above, the present invention is not limited to such specific embodiments, and unless otherwise specifically limited in the above description, various modifications and changes are possible within the scope of the spirit of the present invention as described in the claims. For example, the configurations of the embodiments described above can be added or deleted as appropriate, and the configuration of one embodiment can be provided in other embodiments. Furthermore, the effects in the embodiments described above are merely illustrative of the effects that may arise from the present invention, and do not mean that the effects of the present invention are limited to the effects described above.

[0052] In the above embodiment, the container 10 was described as a double-walled container in which an inner layer 12 housed inside an outer layer 11 deforms in volume in response to the discharge of its contents. However, the form of the container is not particularly limited. For example, the container may have an inner tray in the contents-holding space, similar to an HVD (High Viscosity Dispenser) container used for dispensing high-viscosity liquids, and the contents-holding space may be reduced in volume as the inner tray rises as the contents decrease. Alternatively, the container may deform in appearance in response to the discharge of its contents, similar to a tube container. Furthermore, although the container 10 in the above embodiment has a pipe 25 extending from the cylinder 36 to the bottom of the storage space 12a, the pipe 25 does not need to be provided in the double-walled container 10 or the HVD container described above.

[0053] Furthermore, although the above embodiment was described as the elastic piece 34 being in contact with the lower surface 40c of the dome portion 40 when the dome portion 40 is not being pressed, the present invention is not limited thereto. The elastic piece 34 may be separated from the lower surface 40c of the dome portion 40 when the dome portion 40 is not being pressed, as long as it is elastically deformable when pressed by the dome portion 40. Furthermore, although the slit 41d was described as an elongated slot, the shape of the slit is not particularly limited as long as it is notched; for example, it may be a cross-shaped notch. Furthermore, although the dome portion 40 and the piston 41 are integrally formed and described as being made of, for example, elastomer, the present invention is not limited to this. The dome portion 40 and the piston 41 do not all need to be made of elastomer; a part may be formed of elastomer or silicone, and the other parts may be formed of other materials such as low-density polyethylene (LDPE and LLDPE). For example, at least the slit 41d (discharge port) portion may be formed of elastomer or silicone, while the other parts (piston 41 portion and dome portion 40) may be formed of low-density polyethylene, or the piston 41 including the slit 41d may be formed of elastomer or silicone, while the other parts (dome portion 40) may be formed of low-density polyethylene. Alternatively, the dome portion 40 and the piston 41 may be formed from different materials and assembled into separate components, and these components may be integrated by two-color molding or insert molding. The separate components may also be integrated by methods such as bonding, welding, and fitting assembly. [Explanation of Symbols]

[0054] 10: Container 11: Outer body 11a: Bottom wall of container 11b: Torso 11c: Shoulder 11d: Mouth 11e: Discharger engaging part 12: Inner layer 12a: Containment space 20:Dispenser 21: Cap component (cap part) 22: Pressing operation member 23: Valve component 23a: Base 23b: Valve body 23c: Elastic part 24: Top cover 24a: Top surface of the cover 24b: Cover peripheral wall 25: Pipe 26: Pump section 30: Cap body 30a: Inner circumferential engagement part 31: Top surface of the cap 31a: Opening 32: Cap peripheral wall 33:Supporting wall 33a: Locking protrusion 34: Elastic piece 34a: Proximal end 34b:Tip 35: Connection part 36: Cylinder 37: Cylinder bottom wall 37a: Hole 38: Pipe connection 39: Sealing material 40: Dome section 40a: Center 40b: Peripheral area 40c: Bottom surface 41: Piston 41a: Cylindrical part 41b: Top surface of the piston 41c:Discharge passage 41d: Slit (discharge port) F: Pressing force O: Axis line

Claims

1. A discharger comprising a cap portion attached to the mouth of a container for holding contents, a pump portion that pumps the contents inside the cylinder by a piston moving inside the cylinder, and a discharge port for discharging the contents, It is equipped with a pressing operation member that is subjected to a pressing operation, The pressing operation member is, The cap portion is formed in a dome shape that covers the cap portion from above, and the dome portion is elastically deformed by the pressing force of the pressing operation and returns to its original state when the pressing force is released, and the piston extends downward from the center of the dome portion and fits into the cylinder, and pressurizes the contents when the pressing operation is performed, The cap portion comprises an elastic piece located below the dome portion around the piston, The elastic piece is pressed against the dome portion, which is elastically deformed by the pressing force, and is an extruder that returns to its original state when the pressing force is released.

2. The discharge port is a slit that penetrates the upper part of the pressing operating member and communicates with the inside of the piston, and the slit is closed when the pressing operation is not performed and opens when the pressing operation is performed, according to claim 1.

3. The cap portion comprises a cylindrical cap body that engages with the outer circumference of the opening, and a cap top portion that extends radially outward from the cap body and covers the shoulder portion of the container from above. The discharger according to claim 1, wherein the elastic piece extends upward from the top surface of the cap.

4. The discharger according to claim 1, wherein the elastic piece is plate-shaped and extends along the lower surface of the dome portion from the peripheral edge side to the central side of the dome portion.

5. The discharger according to claim 4, wherein a plurality of elastic pieces are provided at intervals from each other in the circumferential direction of the cap portion.

6. The discharger according to claim 1, wherein the cap portion comprises a cylindrical cap body that engages with the outer circumference of the opening, an annular connecting portion extending radially inward from the upper end of the cap body, and the cylinder extending downward from the connecting portion and positioned inside the opening.

Images