US-12616986-B2 - Trigger-type liquid sprayer

US12616986B2US 12616986 B2US12616986 B2US 12616986B2US-12616986-B2

Abstract

A trigger-type liquid sprayer including a sprayer body mounted on a container body, a nozzle member having a spray hole, and an invertible adapter. The sprayer body includes a longitudinal supply cylinder part, a trigger mechanism having a trigger part, a storage cylinder, and a storage plunger. The invertible adapter includes an adapter main body configured to form a first and second space, the first space configured to bring the container body in communication with an inside of the longitudinal supply cylinder part through an upright introduction port, and the second space configured to bring an inside of the container body in communication with the first space through an inverted introduction port, and a changeover valve configured to block communication between the first and second spaces when the container body is upright and bring the first and second spaces in communication with each other when the container body is inverted.

Inventors

Kota SAKATA
Shigeru Hayakawa

Assignees

YOSHINO KOGYOSHO CO., LTD.

Dates

Publication Date: 20260505
Application Date: 20220830
Priority Date: 20210831

Claims (8)

1 . A trigger-type liquid sprayer comprising: a sprayer body configured to be mounted on a container body; a nozzle member provided in front of the sprayer body and having a spray hole configured to spray a liquid forward; and an invertible adapter attached to a lower end portion of the sprayer body, wherein the sprayer body includes: a longitudinal supply cylinder part extending in an upward/downward direction, through which a liquid suctioned up from an inside of the container body flows; a trigger mechanism having a trigger part disposed in front of the longitudinal supply cylinder part to be movable rearward in a forward biased state, and configured to cause a liquid to flow toward the spray hole according to rearward movement of the trigger part; a storage cylinder extending in a forward/rearward direction, into which a liquid is supplied according to rearward movement of the trigger part; and a storage plunger configured to be movable rearward through the storage cylinder in a forward biased state according to supply of the liquid into the storage cylinder, and configured to cause the liquid in the storage cylinder to flow toward the spray hole, the invertible adapter includes: an adapter main body configured to form a first space and a second space, the first space configured to bring the container body in communication with an inside of the longitudinal supply cylinder part through an upright introduction port, and the second space configured to bring the inside of the container body in communication with the first space through an inverted introduction port; and a changeover valve configured to, in a state that the sprayer body is mounted on the container body, block communication between the first space and the second space when the container body is upright and bring the first space and the second space in communication with each other when the container body is inverted, the longitudinal supply cylinder part includes: an outer tube, and an inner tube fitted into the outer tube, and a storage valve is fitted into the inner tube at an upper end of the inner tube.
2 . The trigger-type liquid sprayer according to claim 1 , wherein the storage cylinder and the storage plunger are provided above the longitudinal supply cylinder part and between the longitudinal supply cylinder part and the nozzle member.
3 . The trigger-type liquid sprayer according to claim 1 , wherein the longitudinal supply cylinder part includes: a first facing wall disposed above the adapter main body; and a first fitting cylinder part passing through the first facing wall in the upward/downward direction, the adapter main body includes: a second fitting cylinder part fitted into the first fitting cylinder part to a portion of the first fitting cylinder part located above the first facing wall through a lower end opening part of the first fitting cylinder part; and a second facing wall overhanging outward in a radial direction crossing the upward/downward direction from a portion of the second fitting cylinder part located below the first fitting cylinder part, and facing the first facing wall in the upward/downward direction, and an escaping portion is formed in a portion of an upper surface of the second facing wall located outside the first fitting cylinder part in the radial direction, the escaping portion being a flat surface or being recessed downward.
4 . A trigger-type liquid sprayer comprising: a sprayer body mounted on a mouth part of a container body, in which a liquid is accommodated, via a mounting cap; and a nozzle part mounted on the sprayer body and having a spray hole configured to spray a liquid, wherein the sprayer body includes: a longitudinal supply cylinder part configured to suction up the liquid in the container body; a trigger mechanism having a trigger part disposed to be movable rearward in a forward biased state, and configured to cause the liquid to flow from an inside of the longitudinal supply cylinder part toward the spray hole according to rearward movement of the trigger part; an invertible adapter disposed inside the mounting cap, disposed below the longitudinal supply cylinder part along an axis of the longitudinal supply cylinder part, and connected to the longitudinal supply cylinder part; a storage cylinder disposed inside the mounting cap, disposed below the invertible adapter along the axis, connected to the invertible adapter, and extending in an upward/downward direction; and a storage plunger provided in the storage cylinder to be movable downward in an upward biased state, the longitudinal supply cylinder part includes: a first flow path through which a liquid flows toward the spray hole according to rearward movement of the trigger part; and a second flow path through which part of the liquid flowing through the first flow path flows toward the storage cylinder, and the invertible adapter includes: an adapter main body configured to define a first space and a second space, the first space configured to bring an inside of the container body in communication with an inside of the first flow path through an upright introduction port, and the second space configured to bring an inside of the container body in communication with the first space through an inverted introduction port; a switching valve configured to, in a state in which the sprayer body is mounted on the container body, block communication between the first space and the second space when the container body is upright and bring the first space and the second space in communication with each other when the container body is inverted; and a relay flow path configured to bring the second flow path and an inside of the storage cylinder in contact with each other.
5 . The trigger-type liquid sprayer according to claim 4 , wherein the longitudinal supply cylinder part includes: an outer tube mounted on a mouth part of the container body via the mounting cap; and an inner tube fitted into the outer tube, the first flow path is formed inside the inner tube, and the second flow path is formed between the inner tube and the outer tube.
6 . The trigger-type liquid sprayer according to claim 4 , wherein the storage cylinder is formed in a cylindrical shape with a top that opens downward, the storage plunger is moved downward from a most elevated position by the liquid supplied into the storage cylinder according to rearward movement of the trigger part, and a recovery hole is formed in a portion of a cylinder wall of the storage cylinder located below the storage plunger when the storage plunger is located at the most elevated position, the recovery hole being configured to bring the inside of the storage cylinder in communication with the inside of the container body.
7 . The trigger-type liquid sprayer according to claim 2 , wherein the longitudinal supply cylinder part includes: a first facing wall disposed above the adapter main body; and a first fitting cylinder part passing through the first facing wall in the upward/downward direction, the adapter main body includes: a second fitting cylinder part fitted into the first fitting cylinder part to a portion of the first fitting cylinder part located above the first facing wall through a lower end opening part of the first fitting cylinder part; and a second facing wall overhanging outward in a radial direction crossing the upward/downward direction from a portion of the second fitting cylinder part located below the first fitting cylinder part, and facing the first facing wall in the upward/downward direction, and an escaping portion is formed in a portion of an upper surface of the second facing wall located outside the first fitting cylinder part in the radial direction, the escaping portion being a flat surface or being recessed downward.
8 . The trigger-type liquid sprayer according to claim 5 , wherein the storage cylinder is formed in a cylindrical shape with a top that opens downward, the storage plunger is moved downward from a most elevated position by the liquid supplied into the storage cylinder according to rearward movement of the trigger part, and a recovery hole is formed in a portion of a cylinder wall of the storage cylinder located below the storage plunger when the storage plunger is located at the most elevated position, the recovery hole being configured to bring the inside of the storage cylinder in communication with the inside of the container body.

Description

TECHNICAL FIELD The present invention relates to a trigger-type liquid sprayer. The present application is a U S. National Phase Application of PCT/JP2022/032555 filed on Aug. 30, 2022, which designates the United States and claims priority to Japanese Patent Application No. 2022-029561, filed Feb. 28, 2022, and Japanese Patent Application No. 2021-141394, filed Aug. 31, 2021, the contents of which are incorporated herein by reference. BACKGROUND ART As a trigger-type liquid sprayer, a configuration including a main pump part configured to store a liquid and a trigger part configured to operate the main pump part has been disclosed. According to this configuration, when the trigger part is pulled rearward, the liquid in a cylinder of the main pump part flows toward a spray hole by pressurizing the inside of the cylinder. Accordingly, the liquid is sprayed through the spray hole. Meanwhile, the liquid in a container body flows into the cylinder as the inside of the cylinder is decompressed in a process in which the trigger part is returned forward. For example, in the following Patent Document 1, a trigger-type liquid sprayer including a storage pump part in addition to a main pump part is disclosed. In such a trigger-type liquid sprayer, while part of the liquid sent out of the main pump part is sprayed through a spray hole according to an operation of a trigger part, part of the liquid is stored in a cylinder of the storage pump part. For this reason, when an operation of the trigger part is stopped, the liquid stored in the cylinder of storage pump part flows toward the spray hole. Accordingly, even in a state in which the trigger part is not operated, the liquid can be sprayed continuously. In addition, a trigger-type liquid sprayer configured to suck up a liquid from the inside of a container body by an operation of a trigger part and spray the liquid through a spray hole is known. As such a trigger-type liquid sprayer, for example, as disclosed in the following Patent Document 2, a trigger-type liquid sprayer including a sprayer body mounted on a container body in which a liquid is accommodated and a nozzle member having a spray hole configured to spray the liquid is known. The sprayer body includes a storage cylinder having an inner tube and an outer tube. The storage cylinder is arranged vertically in a container axis direction inside a mounting cap attached to a mouth part of the container body. The inside of the inner tube functions as a connecting passage that allows a longitudinal flow path and a pipe to be communicating. An annular space between the inner tube and the outer tube communicates with the longitudinal flow path via the communication passage. An annular piston is vertically movably disposed in the annular space in an upward biased state. In the above-mentioned trigger-type liquid sprayer, part of the liquid sprayed from the spray hole is introduced into the annular space from the longitudinal flow path through the communication passage by operating the trigger part and stored in the storage cylinder while pressing the annular piston. Accordingly, even after the operation of the trigger part is performed, the liquid stored in the storage cylinder can be sprayed from the spray hole by an upward biasing force of the annular piston. Accordingly, continuous spraying of the liquid can be performed. CITATION LIST Patent Document [Patent Document 1] Japanese Unexamined Patent Application, First Publication No. 2017-213497 [Patent Document 2] Japanese Unexamined Patent Application, First Publication No. 2014-148330 SUMMARY OF INVENTION Technical Problem Incidentally, in the trigger-type liquid sprayer capable of continuous spraying as disclosed in the above-mentioned Patent Document 1, a spray operation of the liquid may be required in both an upright posture and an inverted posture of the container body. In addition, in such a trigger-type liquid sprayer as disclosed in the above-mentioned Patent Document 2, the spray operation of the liquid may be required when both upright and upon inversion. Here, as the trigger-type liquid sprayer that meets these needs, one in which an invertible adapter is provided inside the mounting cap is known. The invertible adapter is an adapter that enables spraying of the liquid inside the container body in either the upright posture or the inverted posture of the container body. In the trigger-type liquid sprayer capable of performing the continuous spraying disclosed in the above-mentioned Patent Document 2, when the spray of the liquid is performed upon both upright and inversion, the invertible adapter also needs to be installed inside the mounting cap, in addition to the storage cylinder. However, when both the storage cylinder and the invertible adapter are provided, it is necessary to secure a large space in a radial direction, and a cap diameter of the mounting cap becomes large. Accordingly, this results in an increase in the overall size of the trigge