JP-7855474-B2 - Pump-type dispensing device

Inventors

• 前田 信也

Assignees

• 株式会社吉野工業所

Dates

Publication Date

20260508

Application Date

20220929

Claims (4)

1. A pump-type dispenser comprising a cap fitted to the mouth of a container holding a liquid, a pump driven by the movement of a stem held at the mouth by the cap, and a head connected to the stem having a discharge port for discharging the liquid to the outside, wherein the liquid inside the container is discharged from the discharge port by moving the head toward the cap, The head is provided with an inclined portion that tilts away from the central axis of the stem as it approaches the cap, The cap has an elastic piece that, when the head is moved toward the cap, bends toward the central axis due to the inclined portion, The cap comprises a plurality of elastic pieces and has gaps between adjacent elastic pieces. The head is a pump-type discharger that is positioned in the gap and has an elastic part that elastically deforms as the elastic piece bends toward the central axis, thereby narrowing the gap .
2. The head is composed of a head body and a ring member, The head body comprises the discharge port and the peripheral wall, The pump-type discharger according to claim 1 , wherein the ring member is disposed inside the peripheral wall and held by the peripheral wall, and comprises an annular wall having the elastic portion.
3. The pump-type discharger according to claim 2 , wherein the elastic portion has one end and the other end connected to the annular wall , forming an annular shape with the annular wall, and the intermediate portion is positioned in the gap.
4. The pump-type discharger according to any one of claims 1 to 3 , wherein the cap has a cap-side peripheral wall that extends in a direction circumferential to the central axis and surrounds the elastic piece.

Description

This invention relates to a pump-type dispensing device. A known type of pump-type dispenser comprises a cap attached to the mouth of a container, a pump driven by the reciprocating movement of a stem held at the mouth by the cap, and a head connected to the stem. By moving the head toward the cap, the liquid contents of the container are discharged from the outlet of the head (see, for example, Patent Document 1). As shown in Patent Document 1, a coil spring is provided inside such a pump-type dispenser to return the head, which has been moved toward the cap, to its initial position. Japanese Patent Publication No. 2011-31950 This figure shows one embodiment of a pump-type discharger according to the present invention, where (a) is a cross-sectional view in a side view, and (b) is a cross-sectional view along line A-A.Figure 1 shows a pump-type discharger with the head pressed down, where (a) is a cross-sectional view from the side and (b) is a cross-sectional view along B-B.This figure shows the state of the elastic piece and elastic part before the head is pressed, where (a) is a perspective view showing the cap alone, and (b) is a perspective view showing the ring member alone.This figure shows the state of the elastic piece and elastic part after the head has been pressed, where (a) is a perspective view showing the cap alone, and (b) is a perspective view showing the ring member alone. The following describes an embodiment of the pump-type discharger according to the present invention, with reference to the drawings. In this specification, the vertical direction refers to the direction along the central axis O (the central axis of the stem 7a, described later), where the side where the pipe 4 is located is "down" and the side where the head body 11 is located is "up". The radial direction refers to the direction perpendicular to the central axis O within a plane perpendicular to the central axis O, and the circumferential direction refers to the direction of rotation around the central axis O within this plane. The pump-type dispenser 100 of this embodiment is used by attaching it to the mouth of a bottle-shaped container (not shown). The liquid dispensed by the pump-type dispenser 100 is, for example, shampoo, body soap, hand soap, facial cleanser, etc. The pump-type discharger 100 is composed of a cylinder 1, a valve member 2, a pipe 4, an internal member 5, a piston 6, a cylindrical member 7, a holder 8, a packing 9, a cap 10, a head body 11, and a ring member 12. Here, the cylinder 1, valve member 2, internal member 5, piston 6, cylindrical member 7, and holder 8 constitute the "pump" as defined herein, while the head body 11 and ring member 12 constitute the "head" as defined herein. Of these components, the valve member 2, piston 6, packing 9, and ring member 12 are made of elastic, soft synthetic resin (e.g., polyethylene (LDPE, HDPE, foamed PE)), while the other components are made of hard synthetic resin (e.g., polypropylene (PP), polybutylene terephthalate (PBT), polyacetal (POM) resin, etc.). Each component of the pump-type discharger 100 is basically shaped around a central axis O. The cylinder 1 has a disc-shaped bottom wall portion 1a with a central portion projecting upward, a cylindrical cylindrical wall portion 1b rising from the outer edge of the bottom wall portion 1a, and a flange wall 1c extending radially outward from the upper part of the cylindrical wall portion 1b. A through hole (suction port 1d) is provided in the central projection of the bottom wall portion 1a. A cylindrical retaining tube 1e is provided on the lower surface of the bottom wall portion 1a, surrounding the suction port 1d and extending downward to hold the pipe 4. A through hole (vent port 1f) is provided in the cylindrical wall portion 1b. The valve member 2 comprises a base portion 2a, a valve body portion 2b that covers the suction port 1d and sits on the upper surface of the bottom wall portion 1a, and an elastically deformable connecting piece 2c that connects the base portion 2a and the valve body portion 2b. The valve member 2 functions as a check valve; when the pressure inside the cylinder 1 decreases, the valve body portion 2b, which was closing the suction port 1d, separates from the bottom wall portion 1a, opening the suction port 1d. In this embodiment, the base portion 2a is a capped cylindrical shape and has an opening (not shown) through which the liquid contents that have passed through the suction port 1d pass. The base portion 2a is fitted and held to the inner circumferential surface of the cylindrical wall portion 1b, thereby holding the valve member 2 within the cylinder 1. Pipe 4 is hollow, and its upper end is inserted into and fitted into the retaining cylinder 1e. The internal member 5 is positioned inside the cylinder 1 and moves up and down relative to the cylinder 1. The internal member 5 comprises a cylindrical connecting cylinder 5a and a bottom portion 5b that closes the lower