Trigger-type liquid dispenser

Abstract

Even when a lateral force intersecting the front-to-back direction is applied to the trigger, the reduction in sealing performance between the piston and cylinder is suppressed. [Solution] The guide cylinder 50 is provided with a guide projection 51 that protrudes at least in the left-right direction among the directions intersecting the front-rear direction and contacts or is close to the inner circumferential surface of the cylinder 32. The trigger portion 31 is provided with a push projection 72 that protrudes toward the rear and abuts toward the front end of the piston shaft portion 71 in the front-rear direction. An upper supported portion 23 is formed at the upper end of the biasing member 24, which is fixed to the vertical supply cylinder portion 11 and the cylinder 32. A lower supported portion 24b is formed at the lower end of the biasing member, which is supported by the guide cylinder. The biasing member supports the trigger portion so that it can move backward in a forward biased state via the guide cylinder, piston, and push projection.

Description

Technical Field

[0001] The present invention relates to a trigger-type liquid ejector.

Background Art

[0002] Conventionally, there is known a trigger-type liquid ejector in which, when a trigger part is pulled rearward, the liquid contained in a cylinder flows through a vertical supply cylinder part toward an ejection hole and is ejected through the ejection hole, while when the hand is released from the trigger part and the trigger part returns forward, the liquid in a container body is drawn up into the vertical supply cylinder part and flows into the cylinder. In this type of trigger-type liquid ejector, as shown in, for example, Patent Document 1 below, it is known that when a lateral force intersecting the front-rear direction is applied to the trigger part during distribution, storage, or when the trigger part is pulled rearward, the sealing performance between the piston and the cylinder may be degraded.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, even when a lateral force is applied to the trigger part, there remains room for improvement in suppressing the degradation of the sealing performance between the piston and the cylinder.

[0005] The present invention provides a trigger-type liquid ejector capable of suppressing degradation of the sealing performance between a piston and a cylinder even when a lateral force intersecting the front-rear direction is applied to a trigger part.

Means for Solving the Problems

[0006] A trigger-type liquid dispenser according to one aspect of the present invention comprises a dispenser body attached to a container body for containing liquid, and a nozzle member attached to the front end of the dispenser body and having a discharge hole formed therein for discharging liquid forward, wherein the dispenser body has a vertical supply cylinder portion extending in the vertical direction for drawing up liquid from the container body, and a trigger portion disposed in front of the vertical supply cylinder portion so as to be movable backward in a forward biased state, and a trigger mechanism which causes the liquid to flow from the vertical supply cylinder portion toward the discharge hole when the trigger portion moves backward, wherein the trigger mechanism comprises a cylinder communicating with the vertical supply cylinder portion and opening toward the front, and a piston that moves in the forward and backward direction relative to the cylinder as the trigger portion moves in the forward and backward direction, wherein the piston has a sliding cylinder portion fitted so as to be slidable back and forth within the cylinder, and a piston shaft portion protruding forward from the sliding cylinder portion, and a guide on the piston shaft portion The cylinder is enclosed, and the guide cylinder is provided with guide projections that protrude in the left-right direction which is at least perpendicular to the front-rear direction among the directions that intersect the front-rear direction, and that abut against or are close to the inner circumferential surface of the cylinder, and the trigger portion is provided with a push projection that protrudes toward the rear and abuts toward the front end of the piston shaft portion in the front-rear direction, and as the trigger portion moves toward the rear, the push projection pushes toward the front end of the piston shaft portion toward the rear, thereby moving the piston toward the rear, and the trigger mechanism is provided with a biasing member that supports the trigger portion so that it can move toward the rear in a forward biased state, and an upper supported portion is formed at the upper end of the biasing member which is fixed to the vertical supply cylinder portion and the cylinder, and a lower supported portion is formed at the lower end of the biasing member which is supported by the guide cylinder, and the biasing member supports the trigger portion so that it can move toward the rear in a forward biased state via the guide cylinder, the piston and the push projection.

[0007] The guide cylinder, which is mounted on the piston shaft, is provided with guide projections that protrude in at least the left-right direction perpendicular to the front-rear direction, and that contact or are close to the inner circumferential surface of the cylinder. Therefore, for example, when the trigger is pulled backward, even if a lateral force intersecting the front-rear direction is applied to the trigger, the guide projections contact the inner circumferential surface of the cylinder, which prevents the piston from tilting relative to the cylinder and thus prevents a decrease in the sealing performance between the piston and the cylinder. Since the guide cylinder is not formed integrally with the piston shaft but as a separate component, the function of suppressing a decrease in the sealing performance between the piston and the cylinder can be provided without complicating the piston structure. As the trigger moves backward, the push projection that pushes the front end of the piston shaft backward to move the piston backward does not engage or fix with the front end of the piston shaft, but simply abuts against it in the front-to-back direction. Therefore, when a lateral force is applied to the trigger, this force is less likely to be transmitted from the trigger to the piston, thereby suppressing the piston from tilting relative to the cylinder. Since the lower supported portion of the biasing member is supported by a guide cylinder rather than the trigger portion, and the biasing member supports the trigger portion so that it can move backward in a forward biased state via the guide cylinder, piston, and push projection, even if the push projection simply abuts against the front end of the piston shaft portion in the front-rear direction, the forward restoring force of the biasing member generated when the trigger portion pulled backward is released can be transmitted to the trigger portion via the guide cylinder, piston, and push projection, allowing the piston and trigger portion to return to their forward positions.

[0008] The guide cylinder is provided with a support portion that supports the lower supported portion from the front of the lower supported portion, and the support portion and the guide projection may be separated in the circumferential direction of the cylinder along the central axis of the cylinder.

[0009] Since the support portion and guide projection are spaced apart in the circumferential direction of the cylinder along the central axis of the cylinder, the guide cylinder can be easily injection molded without complicating the mold structure.

[0010] The guide cylinder may be made of a material harder than the material forming the piston.

[0011] Since the guide cylinder is made of a harder material than the material forming the piston, it is possible to suppress deformation of the guide projection when a lateral force is applied to the trigger and the guide projection comes into contact with the inner surface of the cylinder, and deformation of the guide cylinder due to external force applied from the lower supported part of the biasing member when the trigger is pulled backward. [Effects of the Invention]

[0012] According to the above embodiment of the present invention, even if a lateral force intersecting the front-rear direction is applied to the trigger portion, a decrease in the sealing performance between the piston and the cylinder can be suppressed. [Brief explanation of the drawing]

[0013] [Figure 1] This is a longitudinal cross-sectional view of a trigger-type liquid dispenser according to one embodiment. [Figure 2] This is an enlarged view of the guide tube in Figure 1. [Figure 3] Figure 1 is a rear view of the guide tube. [Modes for carrying out the invention]

[0014] An embodiment of the present invention will be described below with reference to the drawings. As shown in Figure 1, the trigger-type liquid dispenser 1 of this embodiment comprises a dispenser body 2 attached to a container A that contains liquid, and a nozzle member 3 attached to the dispenser body 2, which has a discharge hole 3A for discharging liquid. Unless otherwise specified, each component of the trigger-type liquid dispenser 1 is a molded product made of synthetic resin.

[0015] The dispenser body 2 comprises a vertical supply cylinder section 11 and a trigger mechanism 17, and is attached to the mouth of container body A via a mounting cap 12.

[0016] Hereinafter, the side of the container body A along the central axis O1 of the vertical supply cylinder portion 11 is referred to as the lower side, the opposite side is referred to as the upper side, and the direction along the central axis O1 is referred to as the vertical direction. The direction intersecting the central axis O1 when viewed from the vertical direction is referred to as the radial direction, and the direction circulating around the central axis O1 when viewed from the vertical direction is referred to as the circumferential direction. Of the radial directions, the direction in which the ejection hole 3A opens is referred to as the front direction, and the opposite direction is referred to as the rear direction. The direction orthogonal to the front-rear direction when viewed from the vertical direction is referred to as the left-right direction.

[0017] The vertical supply cylinder portion 11 extends in the vertical direction and sucks up the liquid in the container body A. A pipe 20 that extends in the vertical direction and sucks up the liquid from the container body A is fitted into the vertical supply cylinder portion 11. A lower valve seat portion 11A and an upper valve seat portion 11B located above the lower valve seat portion 11A are formed in a portion of the vertical supply cylinder portion 11 that is located above the portion where the pipe 20 is fitted.

[0018] A ball valve 21 is seated on the lower valve seat portion 11A. The ball valve 21, by separating upward from the lower valve seat portion 11A, allows the liquid to flow from the inside of the container body A into the later-described cylinder 32 through the inside of the vertical supply cylinder portion 11, and by seating on the lower valve seat portion 11A, restricts the flow of liquid from the inside of the cylinder 32 into the container body A through the inside of the vertical supply cylinder portion 11. Here, the ball valve 21 is formed of metal, synthetic resin, or the like.

[0019] A switching valve 22 is seated on the upper valve seat portion 11B. The switching valve 22 is integrally formed of an elastically deformable material such as soft polyethylene. The switching valve 22, by separating upward from the upper valve seat portion 11B, allows the liquid to flow from the inside of the cylinder 32 toward the ejection hole 3A side through the inside of the vertical supply cylinder portion 11, and by seating on the upper valve seat portion 11B, restricts the flow of liquid from the ejection hole 3A side into the cylinder 32 through the inside of the vertical supply cylinder portion 11.

[0020] At the upper end portion of the vertical supply cylinder portion 11 located above the upper valve seat portion 11B, an injection cylinder portion 13 extending forward is provided. The interior of the injection cylinder portion 13 communicates with the interior of the vertical supply cylinder portion 11. The injection cylinder portion 13 guides the liquid in the vertical supply cylinder portion 11 to the nozzle member 3. A tubular relay member 14 is externally fitted onto the injection cylinder portion 13. The rear portion of the relay member 14 is externally fitted onto the injection cylinder portion 13, and the front portion of the relay member 14 protrudes forward from the injection cylinder portion 13. The nozzle member 3 is attached to the front portion of the relay member 14 (the front end portion of the ejector main body 2).

[0021] The trigger mechanism 17 includes a trigger portion 31, a cylinder 32, a piston 33, and a biasing member 24, and causes the liquid to flow from the inside of the vertical supply cylinder portion 11 toward the ejection hole 3A side by the rearward movement of the trigger portion 31.

[0022] The cylinder 32 extends in the front-rear direction, and is formed in a bottomed tubular shape having a front end opened and a bottom wall closing the rear end opening. The cylinder 32 extends forward from a portion of the vertical supply cylinder portion 11 located below the injection cylinder portion 13. The interior of the cylinder 32 communicates with a portion of the interior of the vertical supply cylinder portion 11 located between the lower valve seat portion 11A and the upper valve seat portion 11B through a communication hole 41 that penetrates the bottom wall of the cylinder 32 and the vertical supply cylinder portion 11 in the front-rear direction. A piston guide portion 43 extending forward is provided on the front surface of the bottom wall of the cylinder 32.

[0023] The cylinder 32 and the piston guide portion 43 are disposed coaxially with a central axis O2 extending in the front-rear direction. Hereinafter, the direction intersecting the central axis O2 when viewed from the front-rear direction is referred to as the cylinder radial direction, and the direction circumferentially surrounding the central axis O2 when viewed from the front-rear direction is referred to as the cylinder circumferential direction.

[0024] The piston 33 has a sliding cylinder portion 74 fitted into the cylinder 32 so as to be slidable back and forth, and a piston shaft portion 71 that protrudes forward from the sliding cylinder portion 74, and moves in the back and forth direction relative to the cylinder 32 as the trigger portion 31 moves in the back and forth direction. The sliding cylinder portion 74 and the piston shaft portion 71 are arranged coaxially with the central axis O2. The piston shaft portion 71 is formed in a topped cylindrical shape with an open rear end and a top wall that closes the front end opening. A concave spherical portion 71a that is recessed toward the rear is formed on the front surface of the top wall of the piston shaft portion 71. The piston guide portion 43 is inserted into the piston shaft portion 71. The outer diameter of the piston shaft portion 71 is smaller than the inner diameter of the cylinder 32. A locking groove 71b that extends continuously around the entire circumference is formed on the outer circumferential surface of the front end of the piston shaft portion 71. The sliding cylinder portion 74 protrudes outward from the rear end of the piston shaft portion 71 in the radial direction of the cylinder and extends continuously around its entire circumference.

[0025] The trigger section 31 comprises a trigger side wall 31a and a trigger front wall 31b, and is positioned in front of the vertical supply cylinder section 11 so as to be movable backward while biased forward.

[0026] The trigger sidewall 31a is formed in a plate shape with its front and back surfaces facing left and right and extending in the vertical direction, and a pair of them are provided on the left and right sides. The upper end of the trigger sidewall 31a sandwiches the rear part of the relay member 14 in the left and right direction. A shaft portion 82 is formed at the upper end of the trigger sidewall 31a, protruding outward in the left and right direction. The trigger front wall 31b connects the front ends of the left and right pair of trigger side walls 31a. The trigger front wall 31b is formed in a plate shape with its front and back surfaces facing the front-to-back direction and extending in the vertical direction. The trigger front wall 31b is provided on the portion of the trigger side wall 31a located below the upper end.

[0027] The front end of the piston shaft portion 71 faces the rear surface of the trigger front wall 31b in the front-rear direction and is set back from it. The rear surface of the trigger front wall 31b is provided with a push projection 72 that protrudes backward and abuts against the front end of the piston shaft portion 71 in the front-rear direction. As the trigger portion 31 moves backward, the push projection 72 pushes the front end of the piston shaft portion 71 backward, causing the piston 33 to move backward. The rear end of the push projection 72 is formed in a hemispherical shape that protrudes backward. The rear end of the push projection 72 is in slidable contact with the inner surface of the concave spherical portion 71a. The radius of curvature of the rear end of the push projection 72 is smaller than the radius of curvature of the concave spherical portion 71a.

[0028] The biasing member 24 supports the trigger portion 31 so that it can move backward while biased forward.

[0029] The biasing members 24 are provided on both sides of the rear of the relay member 14 in the left-right direction, and have elastic deformation portions 24a that are elongated vertically and curved to protrude forward when viewed from the left-right direction. The upper end of the elastic deformation portion 24a is located at the same vertical position as the upper end of the relay member 14, and the lower end of the elastic deformation portion 24a is located at the same vertical position as the front end of the piston shaft portion 71. An upper support portion 23 is formed at the upper end of the biasing member 24, fixed to the vertical supply cylinder portion 11 and the cylinder 32. The upper support portion 23 is formed in a plate shape with its front and back surfaces facing vertically, and is attached to the upper end of the rear of the relay member 14. The upper support portion 23 connects the upper ends of a pair of left and right elastic deformation portions 24a. At both ends of the upper support portion 23 in the left and right directions, bearing portions 25 are separately formed, protruding downward from the portion located behind the upper end of the elastic deformation portion 24a and exhibiting a C-shape that opens towards the rear when viewed from the left and right directions. The shaft portion 82 of the trigger portion 31 is rotatably supported on each bearing portion 25. The lower end of the biasing member 24 has a lower supported portion 24b that is supported by a guide cylinder 50, which will be described later. The lower supported portion 24b protrudes downward from the lower end of the elastically deformable portion 24a. The biasing member 24 supports the trigger portion 31 in a forward biased state so that it can move backward, via the guide cylinder 50, piston 33, and push-in projection 72, with the upper supported portion 23 fixed to the vertical supply cylinder portion 11 and cylinder 32, and the lower supported portion 24b supported to the guide cylinder 50, piston 33, and push-in projection 72.

[0030] The nozzle member 3 is attached to the relay member 14 from the front. The nozzle member 3 is formed in a topped cylindrical shape with an open rear end and a top wall that closes the front opening. A ejection hole 3A is formed in the top wall of the nozzle member 3, opening forward. The ejection hole 3A communicates with the injection cylinder portion 13 through the inside of the nozzle member 3 and the front part of the relay member 14.

[0031] In this embodiment, a guide cylinder 50 is externally mounted on the piston shaft portion 71. The guide cylinder 50 is made of a harder material than the material forming the piston 33. The front end of the guide cylinder 50 is inserted between a pair of left and right trigger side walls 31a.

[0032] A locking projection 50a is formed around the entire circumference of the inner circumferential surface of the guide cylinder 50, projecting inward in the diameter direction of the cylinder. The locking projection 50a is fitted into a locking groove 71b of the piston shaft portion 71. In this way, the guide cylinder 50 is fixed to the piston 33. The guide tube 50 is provided with a guide projection 51 and a support portion 52.

[0033] The guide projection 51 protrudes from the outer circumferential surface of the guide cylinder 50 in at least the left-right direction, which intersects the front-rear direction, and contacts or is close to the inner circumferential surface of the cylinder 32. As shown in Figures 2 and 3, the guide projection 51 is integrally provided across both left-right ends and the upper end of the outer circumferential surface of the guide cylinder 50. In other words, the guide projection 51 is provided on the upper half of the outer circumferential surface of the guide cylinder 50. The guide projection 51 is provided at the rear end of the guide cylinder 50. The guide projection 51 is located in front of the sliding cylinder portion 74 of the piston 33.

[0034] The guide projection 51 comprises a bottom wall 51a, an outer peripheral wall 51b, and a circumferential end wall 51c. The bottom wall 51a protrudes outward from the outer circumferential surface of the guide cylinder 50 in the diameter direction of the cylinder, with its front and back surfaces facing in the front-to-back direction. The outer circumferential wall 51b extends forward from the outer circumferential edge of the bottom wall 51a. The circumferential end wall 51c protrudes outward from the outer circumferential surface of the guide cylinder 50 in the diameter direction of the cylinder and is connected to the circumferential ends of the bottom wall 51a and the outer circumferential wall 51b, respectively. The front and back surfaces of the circumferential end wall 51c face in the up-and-down direction. A pair of circumferential end walls 51c are provided, one on the left and one on the right.

[0035] The support portion 52 supports the lower supported portion 24b of the biasing member 24 from the front of the lower supported portion 24b. The support portion 52 and the guide projection 51 are separated in the circumferential direction of the cylinder. The support portion 52 protrudes downward from the lower end of the outer circumferential surface of the guide cylinder 50. The support section 52 comprises a vertical wall 52a, a lower wall 52b, and a rib 52c.

[0036] The vertical wall 52a has its front and back surfaces facing the front-to-back direction and protrudes downward from the lower end of the outer circumferential surface of the guide cylinder 50. The central part of the vertical wall 52a in the left-to-right direction is connected to the lower end of the outer circumferential surface of the guide cylinder 50. When viewed from the front-to-back direction, the vertical wall 52a has a rectangular shape that is elongated in the left-to-right direction. The lower wall 52b has its front and back surfaces facing vertically, and protrudes backward from the lower end of the vertical wall 52a. The ribs 52c are integrally connected to the rear surface of the vertical wall 52a, the upper surface of the lower wall 52b, and the outer circumferential surface of the guide cylinder 50. Multiple ribs 52c are provided at intervals in the left-right direction in the middle section of the support section 52. Of the multiple ribs 52c, the rib 52c located in the left-right central section of the support section 52 protrudes further rearward than the other ribs 52c. The lower supported portion 24b of the biasing member 24 is supported at both ends in the left-right direction of the support portion 52. The lower supported portion 24b is supported at both ends in the left-right direction of the rear surface of the vertical wall 52a, which are located outside the multiple ribs 52c in the left-right direction.

[0037] Next, the operation of the trigger-type liquid dispenser 1 will be explained. It is assumed that the liquid is filled inside the trigger-type liquid dispenser 1 by operating the trigger unit 31.

[0038] When the trigger portion 31 is pulled backward against the forward biasing force of the biasing member 24, the sliding cylinder portion 74 of the piston 33 slides backward on the inner circumferential surface of the cylinder 32, pressurizing the inside of the cylinder 32, and the liquid inside the cylinder 32 is supplied through the communication hole 41 to the portion of the vertical supply cylinder portion 11 located between the lower valve seat portion 11A and the upper valve seat portion 11B. At this time, the pressure of the liquid supplied to the vertical supply cylinder portion 11 causes the ball valve 21 to be pressed against the lower valve seat portion 11A, and the switching valve 22 is pushed up and separated from the upper valve seat portion 11B. As a result, with communication between the inside of the container body A and the inside of the vertical supply cylinder portion 11 blocked, the liquid supplied to the vertical supply cylinder portion 11 reaches the nozzle member 3 through the inside of the injection cylinder portion 13 and the front part of the relay member 14, and is ejected forward from the ejection hole 3A.

[0039] Subsequently, when the trigger portion 31 is released, the forward restoring force of the biasing member 24 is exerted on the piston 33 via the guide cylinder 50, causing the sliding cylinder portion 74 of the piston 33 to slide forward on the inner circumferential surface of the cylinder 32, creating negative pressure inside the cylinder 32. This pressure is exerted on the ball valve 21 and the switching valve 22 through the communication hole 41, causing the switching valve 22 to be pressed against the upper valve seat portion 11B, the ball valve 21 to move upward away from the lower valve seat portion 11A, the liquid in the container body A is drawn up into the vertical supply cylinder portion 11, and the liquid in the vertical supply cylinder portion 11 is supplied into the cylinder 32 through the communication hole 41. In addition, as the piston 33 moves forward, the push-in projection 72 is pushed back forward, and the trigger portion 31 is displaced forward.

[0040] As described above, in the trigger-type liquid dispenser 1 according to this embodiment, the guide cylinder 50, which is mounted on the piston shaft portion 71, is provided with a guide projection 51 that protrudes at least in the left-right direction among the directions intersecting the front-rear direction and contacts or is close to the inner circumferential surface of the cylinder 32. Therefore, for example, when the trigger portion 31 is pulled backward, even if a lateral force intersecting the front-rear direction is applied to the trigger portion 31, the guide projection 51 contacts the inner circumferential surface of the cylinder 32, thereby suppressing the tilting of the piston 33 relative to the cylinder 32 and suppressing a decrease in the sealing performance between the piston 33 and the cylinder 32. Since the guide cylinder 50 is not formed integrally with the piston shaft portion 71 but is formed as a separate component, it is possible to provide a function to suppress a decrease in the sealing performance between the piston 33 and the cylinder 32 without complicating the structure of the piston 33.

[0041] As the trigger portion 31 moves backward, the push projection 72 pushes the front end of the piston shaft portion 71 backward, causing the piston 33 to move backward. Since the push projection 72 does not fix the front end of the piston shaft portion 71 by fitting or other means, but simply abuts against it in the front-rear direction, when a lateral force is applied to the trigger portion 31, it becomes difficult to transmit this force from the trigger portion 31 to the piston 33, thereby suppressing the tilting of the piston 33 relative to the cylinder 32.

[0042] Since the lower supported portion 24b of the biasing member 24 is supported by the guide cylinder 50 instead of the trigger portion 31, and the biasing member 24 supports the trigger portion 31 so as to be able to move backward in a forward biased state via the guide cylinder 50, piston 33, and push projection 72, even if the push projection 72 is simply abutting the front end of the piston shaft portion 71 in the front-rear direction, the forward restoring force of the biasing member 24 generated when the trigger portion 31 that has been pulled backward is released can be transmitted to the trigger portion 31 via the guide cylinder 50, piston 33, and push projection 72, allowing the piston 33 and trigger portion 31 to return to their forward positions.

[0043] Since the support portion 52 and the guide projection 51 are separated in the circumferential direction of the cylinder, the guide cylinder 50 can be easily injection molded without complicating the mold structure.

[0044] Since the guide cylinder 50 is made of a harder material than the material forming the piston 33, it is possible to suppress deformation of the guide projection 51 when a lateral force is applied to the trigger portion 31 and the guide projection 51 comes into contact with the inner circumferential surface of the cylinder 32, and deformation of the guide cylinder 50 due to external force applied from the lower supported portion 24b of the biasing member 24 when the trigger portion 31 is pulled backward.

[0045] Furthermore, the technical scope of the present invention is not limited to the embodiments described above, and various modifications can be made without departing from the spirit of the invention.

[0046] For example, parts of the support portion 52 and the guide projection 51 may be located at the same position in the circumferential direction of the cylinder. The guide tube 50 and the piston 33 may be made of the same material.

[0047] Furthermore, without departing from the spirit of the present invention, the components in the above embodiments may be replaced with well-known components as appropriate, and the above embodiments and modifications may be combined as appropriate. [Explanation of Symbols]

[0048] 1. Trigger-type liquid dispenser 2 Squirt body 3 Nozzle component 3A spout hole 11 Vertical supply cylinder section 17 Trigger Mechanism 23 Top cover support part 24. Biasing member 24b Lower cover support part 31 Trigger section 32 liters 33 pistons 50 Guide tube 51 Guide projection 52 Support part 71 Piston shaft section 72 Push-in protrusion 74 Sliding cylinder section A container

Claims

1. A sprayer body attached to a container body that holds liquid, A nozzle member is attached to the front end of the aforementioned ejector body and has a nozzle hole formed therein for ejecting liquid forward, Equipped with, The aforementioned spray body, A vertical supply cylinder that extends in the vertical direction and draws up the liquid inside the container, The trigger mechanism has a trigger portion positioned in front of the vertical supply cylinder portion so as to be movable backward in a forward biased state, and the movement of the trigger portion backward causes the liquid to flow from inside the vertical supply cylinder portion toward the ejection hole side, Equipped with, The trigger mechanism, A cylinder that communicates with the vertical supply cylinder and opens forward, A piston that moves in the forward and backward direction relative to the cylinder as the trigger portion moves in the forward and backward direction, Equipped with, The piston has a sliding cylinder portion fitted into the cylinder so as to be slidable back and forth, and a piston shaft portion that protrudes forward from the sliding cylinder portion. A guide cylinder is attached to the piston shaft. The guide cylinder is provided with guide projections that protrude in the left-right direction, which is at least perpendicular to the front-rear direction, among the directions that intersect the front-rear direction, and that abut against or are close to the inner circumferential surface of the cylinder. The trigger portion is provided with a push-in projection that protrudes toward the rear and abuts against the front end of the piston shaft portion in the front-rear direction. As the trigger portion moves backward, the push projection pushes the front end of the piston shaft backward, causing the piston to move backward. The trigger mechanism includes a biasing member that supports the trigger portion so that it can move backward while biased forward, An upper support portion fixed to the vertical supply cylinder portion and the cylinder is formed at the upper end of the biasing member. A lower support portion supported by the guide cylinder is formed at the lower end of the biasing member. A trigger-type liquid dispenser, wherein the biasing member supports the trigger portion so that it can move backward in a forward biased state via the guide cylinder, the piston, and the push-in projection.

2. The guide cylinder is provided with a support portion that supports the lower supported portion from the front of the lower supported portion. The trigger-type liquid dispenser according to claim 1, wherein the support portion and the guide projection are separated in the circumferential direction of the cylinder along the central axis of the cylinder.

3. The trigger-type liquid dispenser according to claim 1 or 2, wherein the guide cylinder is made of a material harder than the material forming the piston.

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