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JP-2026074825-A - Dispenser

JP2026074825AJP 2026074825 AJP2026074825 AJP 2026074825AJP-2026074825-A

Abstract

[Problem] To fix the cylinder in place at the upper end position relative to the mounting cap. [Solution] The device comprises a mounting cap 10, a cylinder 15, a stem 11, a discharge head 12, and a piston 13. The mounting cap comprises an outer cylinder 23 extending upward from the inner peripheral edge of the top wall 21, a ring wall 24 extending radially inward from the upper end of the outer cylinder, and an inner cylinder 25 extending downward from the radial inner end of the ring wall. The upper end of the cylinder is inserted between the inner circumferential surface of the outer cylinder and the outer circumferential surface of the inner cylinder, and contacts the inner circumferential surface of the outer cylinder and the outer circumferential surface of the inner cylinder. A vertical recess 26 extending in the vertical direction is formed on the outer circumferential surface of the upper end of the cylinder. The upper end of the vertical recess opens to the upper end opening edge 15a of the cylinder, and the lower end of the vertical recess is open to the inner surface of the mounting cap. [Selection Diagram] Figure 1

Inventors

  • 峯村 宏

Assignees

  • 株式会社吉野工業所

Dates

Publication Date
20260507
Application Date
20241021

Claims (3)

  1. A top-mounted cylindrical cap, which is attached to the mouth of the container body containing the liquid, and has an annular top wall, A cylinder that extends in the vertical direction and is fixed to the mounting cap while being inserted inside the opening, A stem is disposed within the cylinder so as to be movable downward while being biased upward, A discharge head is attached to the upper end of the stem and has a discharge hole for the liquid contents, The cylinder comprises a piston that is fitted to slide vertically within the cylinder and is linked to the vertical movement of the stem, When the stem and the piston are moved downward relative to the cylinder, the liquid inside the cylinder is discharged through the stem and out of the discharge hole. The mounting cap comprises an outer cylinder extending upward from the inner peripheral edge of the top wall, a ring wall extending radially inward from the upper end of the outer cylinder, and an inner cylinder extending downward from the radial inner end of the ring wall. The upper end of the cylinder is inserted between the inner surface of the outer cylinder and the outer surface of the inner cylinder, and contacts the inner surface of the outer cylinder and the outer surface of the inner cylinder. A discharger having a vertical recess extending in the vertical direction formed on the outer circumferential surface of the upper end of the cylinder, the upper end of the vertical recess opening to the upper end opening edge of the cylinder, and the lower end of the vertical recess opening to the inner surface of the mounting cap.
  2. Of the upper end of the cylinder, the outer diameter of the upper part is larger than the outer diameter of the lower part. The upper part of the upper end of the cylinder is fitted into the outer cylinder with an undercut. The lower part of the upper end of the cylinder abuts against the inner circumferential surface of the outer cylinder. The discharger according to claim 1, wherein the vertical recess is formed along the entire vertical length at the upper end of the cylinder.
  3. The discharger according to claim 2, wherein a gate mark is provided on the inner surface of the vertical recess, in the portion located at the upper part of the upper end of the cylinder.

Description

This invention relates to a dispensing device. Conventionally, as a discharger in which the liquid contents of the cylinder are discharged through the stem and out of the discharge hole of the discharge head when the discharge head is pressed down, causing the stem and piston to move downward relative to the cylinder, a configuration is known in which, for example, as shown in Patent Document 1 below, a topped cylindrical mounting cap having an annular top wall comprises an outer cylinder extending upward from the inner peripheral edge of the top wall, a ring wall extending radially inward from the upper end of the outer cylinder, and an inner cylinder extending downward from the radial inner end of the ring wall, with the upper end of the cylinder inserted between the inner circumferential surface of the outer cylinder and the outer circumferential surface of the inner cylinder, and in contact with the inner circumferential surface of the outer cylinder and the outer circumferential surface of the inner cylinder. Japanese Utility Model Publication No. 2-102373 This is a longitudinal cross-sectional view of a discharger according to one embodiment.Figure 1 is a side view of the cylinder.Figure 1 is a top view of the cylinder. An embodiment of the present invention will be described below with reference to the drawings. As shown in Figure 1, the discharger 1 according to this embodiment comprises a mounting cap 10, a stem 11, a discharge head 12, a piston 13, a piston guide 14, and a cylinder 15. The mounting cap 10, stem 11, piston 13, piston guide 14, and cylinder 15 are arranged so that their respective central axes lie on a common axis. Hereafter, this common axis will be referred to as the central axis O, and the direction along the central axis O will be called the vertical direction. Furthermore, when viewed from the vertical direction, the direction intersecting the central axis O will be called the radial direction, and the direction revolving around the central axis O will be called the circumferential direction. The mounting cap 10 is formed in a top-cylindrical shape having an annular top wall 21 and a circumferential wall 22, and is attached to the mouth W1 of the container body W containing the liquid. The inner surface of the circumferential wall 22 has a female thread that screws into the male thread formed on the outer surface of the mouth W1. The mounting cap 10 comprises an outer cylinder 23 extending upward from the inner peripheral edge of the top wall 21, a ring wall 24 extending radially inward from the upper end of the outer cylinder 23, and an inner cylinder 25 extending downward from the radial inner end of the ring wall 24. The ring wall 24 is formed in a plate shape with its front and back surfaces facing in the vertical direction. The inner diameter of the upper part of the outer cylinder 23 is larger than the inner diameter of the lower part of the outer cylinder 23, and an upward-facing step is formed on the inner circumferential surface of the connection portion between the upper and lower parts of the outer cylinder 23. The connection portion 10a between the lower end of the inner circumferential surface of the outer cylinder 23 and the inner circumferential edge of the lower surface of the top wall 21 exhibits a curved shape that protrudes diagonally downward in the radial direction when viewed in a vertical cross-section along the vertical direction. The stem 11 is disposed within the cylinder 15 so as to be movable downward while being biased upward. The lower end of the stem 11 is inserted into the cylinder 15, and the upper end protrudes upward from the cylinder 15. The discharge head 12 comprises a top-mounted cylindrical mounting section 12a attached to the upper end of the stem 11, and a nozzle section 12b protruding radially outward from the mounting section 12a. The stem 11 is fitted inside the mounting section 12a. The tip opening of the nozzle section 12b is a discharge hole 12c through which the liquid contents are discharged. The piston 13 is fitted into the cylinder 15 so as to be able to slide up and down. The piston 13 is cylindrical and is linked to the up and down movement of the stem 11. The piston 13 is formed in a double-cylinder shape, having an outer cylinder portion and an inner cylinder portion. The outer cylinder portion abuts against the inner circumferential surface of the cylinder 15, and a piston guide 14 is inserted inside the inner cylinder portion. The upper opening edge of the outer cylinder portion of the piston 13 abuts against the lower opening edge of the inner cylinder 25 of the mounting cap 10. The piston guide 14 is cylindrical in shape, protruding downward from the stem 11 and passing vertically through the inside of the piston 13. The upper end of the piston guide 14 is fitted into the lower part of the stem 11. The lower end opening of the piston guide 14 is located below the piston 13. The upper end opening of the coil spring 17 i