Trigger-type liquid dispenser

Abstract

To suppress generation of breakage or breakdown for instance, when dropped, in a trigger type liquid sprayer having a storage plunger and a storage cylinder.SOLUTION: A trigger type liquid sprayer includes a sprayer body 2, a nozzle member 3 and a cover 5. The sprayer body includes: a storage cylinder 40; a storage plunger 50 arranged in the storage cylinder so as to be movable in an axial direction along a center axis O2 of the storage cylinder, moving to one side in the axial direction with supply of liquid into the storage cylinder, and energized to the other side in the axial direction; and a plunger energizing member 60 for energizing the storage plunger to the other side. An end part 63 at the one side of the plunger energizing member is disposed so as to be elastically deviated to the other side relative to the storage cylinder. The cover covers the plunger energizing member from the one side of the plunger energizing member, and has an end wall part 13 abutted on an end part at the one side of the plunger energizing member when deviated to the other side or deformed.SELECTED DRAWING: Figure 1

Description

Technical Field

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

Background Art

[0002] Conventionally, as shown in Patent Document 1 below, for example, it includes an ejector body, a nozzle member in which an ejection hole is formed, and a cover that covers the ejector body with the ejection hole exposed. The ejector body includes a vertical supply cylinder portion that sucks up the liquid in the container body, a piston that moves back and forth as the trigger portion moves, a cylinder whose interior is pressurized and depressurized as the piston moves and whose interior communicates with the vertical supply cylinder portion, a storage cylinder into which the liquid that has passed through the vertical supply cylinder portion is supplied when the trigger portion moves backward, a storage plunger disposed in the storage cylinder that moves toward one side in the axial direction as the liquid is supplied into the storage cylinder and is biased toward the other side, and a plunger biasing member that biases the storage plunger toward the other side. A trigger-type liquid ejector that enables continuous ejection of liquid through the ejection hole is known.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the trigger-type liquid dispenser described above, in addition to the piston and cylinder, a storage plunger and storage cylinder are also provided to enable continuous liquid ejection. Due to the balance of weight, it is prone to inverting upside down, for example when dropped, and the end wall portion of the cover that covers the plunger biasing member from one side of the plunger biasing member is prone to impact with the ground or other object. In this case, for example, the area near the lower end of the vertical supply cylinder may be damaged or disassembled. It is conceivable to provide reinforcing ribs in areas prone to such damage or disassembly, but in this case, stress may concentrate in areas where there are no reinforcing ribs, making them more susceptible to damage, or the trigger-type liquid dispenser may become larger due to the provision of reinforcing ribs.

[0005] The present invention provides a trigger-type liquid dispenser capable of continuous liquid ejection, which can suppress damage or disassembly that may occur, for example, when dropped. [Means for solving the problem]

[0006] A trigger-type liquid dispenser according to one aspect of the present invention comprises a dispenser body attached to a container body containing liquid, a nozzle member attached to the dispenser body and having a discharge hole formed therein for discharging liquid, and a cover that covers the dispenser body with the discharge hole exposed, wherein the dispenser body has a vertical supply cylinder portion that draws up the liquid from the container body, a trigger portion disposed to be movable to the rear in a forward biased state, a trigger mechanism that causes the liquid to flow from the vertical supply cylinder portion toward the discharge hole side when the trigger portion moves toward the rear, a storage cylinder into which the liquid that has passed through the vertical supply cylinder portion is supplied when the trigger portion moves toward the rear, and the storage cylinder The storage cylinder is equipped with a storage plunger which is movably disposed in the axial direction along the central axis of the storage cylinder and moves toward one side of the axial direction and is biased toward the other side of the axial direction in conjunction with the supply of liquid into the storage cylinder, and a plunger biasing member which biases the storage plunger toward the other side, wherein the end of the plunger biasing member on one side is provided so as to be elastically displaceable toward the other side relative to the storage cylinder, and the cover covers the plunger biasing member from the one side of the plunger biasing member and has an end wall portion which abuts against the end of the plunger biasing member on one side when displaced or deformed toward the other side.

[0007] The one end of the plunger biasing member is provided so as to be elastically displaceable toward the other side relative to the storage cylinder, and the end wall of the cover covers the plunger biasing member from the one side and abuts against the one end of the plunger biasing member when displaced toward the other side. Therefore, for example, if a trigger-type liquid dispenser falls upside down, and the end wall of the cover collides with an object such as the ground and is displaced or deformed toward the other side, the end wall abuts against the one end of the plunger biasing member. At this time, the impact force is absorbed as the one end of the plunger biasing member elastically displaces toward the other side. As a result, even a trigger-type liquid dispenser having a storage plunger and a storage cylinder can be prevented from being damaged or disassembled, for example, when it falls.

[0008] The plunger biasing member has an end opening that opens toward one side, and the end wall portion has a projection that protrudes toward the other side and is inserted into the end opening of the plunger biasing member. The projection portion may have an inclined portion that extends radially inward, intersecting the central axis when viewed from the axial direction, as it moves from one side toward the other side, and that contacts the end opening of the plunger biasing member.

[0009] A protrusion is formed on the end wall of the cover, and an inclined portion is formed on the protrusion that abuts against the opening at one end of the plunger biasing member. For example, even if an impact force is applied to the end wall of the cover from the object to be struck from diagonally above on one side, the inclined portion slides within the opening at one end of the plunger biasing member, causing the end wall to be displaced or deformed along the axial direction. This makes it easier to transmit the impact force to the plunger biasing member in the axial direction.

[0010] The protruding portion is composed of a plurality of plates that extend radially and radially when viewed from the axial direction, and one of the plurality of plates may extend vertically when viewed from the axial direction.

[0011] The protruding portion is composed of a plurality of plates that extend radially and radially when viewed from the axial direction, and one of the plurality of plates extends vertically when viewed from the axial direction. Therefore, regardless of the direction of the impact force exerted from the object to be struck on the end wall, this impact force can be distributed circumferentially with minimal bias towards one end opening of the plunger biasing member and transmitted to the plunger biasing member.

[0012] The plunger biasing member comprises a coil spring extending in the axial direction and a spring holder formed in the shape of a horizontally oriented bottomed cylinder, with the other side open and the bottom wall closing the opening on the one side, wherein the one end of the coil spring is inserted into the spring holder, the one end of the coil spring is supported by the bottom wall of the spring holder, and a one-end opening is formed that opens toward the one side, and the spring holder may be fitted into the storage cylinder so as to be elastically displaceable in the axial direction.

[0013] The plunger biasing member includes a spring retainer formed in the shape of a horizontally oriented bottomed cylinder, into which one end of a coil spring is inserted, and the bottom wall of the spring retainer supports the one end of the coil spring, and an opening is formed at one end that opens toward the one side, and the spring retainer is fitted into the storage cylinder so as to be elastically displaceable in the axial direction. Therefore, when an impact force is applied to the end wall of the cover from the object being impacted, and the end wall and the spring retainer are displaced toward the other side, the coil spring can be smoothly compressed and deformed along the axial direction, and the impact force can be reliably absorbed.

[0014] The cover is provided with a locking portion that slides over a locking portion provided on the ejector body from one side to the other side to lock into place, and an elastically deformable deformable portion is formed in the cover between the end wall portion and the locking portion, and as the deformable portion deforms, the end wall portion and the locking portion may be elastically displaced relative to each other in the axial direction.

[0015] In the process of assembling the cover and the sprayer body by moving them relatively closer in the axial direction with the cover positioned on one side relative to the sprayer body, even if the end wall of the cover catches on the one end of the plunger biasing member before the locking portion of the cover crosses over the locked portion of the sprayer body to the other side, the cover's locking portion can be made to cross over the locked portion of the sprayer body to the other side by elastically deforming the deformable portion of the cover in the axial direction. When an impact force is applied to the end wall of the cover by an object being struck, the impact force can be absorbed by elastically deforming the deformable portion, thereby suppressing relative displacement between the cover and the ejector body when an impact force is applied to the end wall of the cover by an object being struck. [Effects of the Invention]

[0016] According to the above embodiment of the present invention, damage or disassembly of a trigger-type liquid dispenser having a storage plunger and a storage cylinder can be suppressed, for example, when it is dropped. [Brief explanation of the drawing]

[0017] [Figure 1] This is a longitudinal cross-sectional view of a trigger-type liquid dispenser according to one embodiment of the present invention. [Figure 2] Figure 1 is a cross-sectional view of a trigger-type liquid dispenser taken along the line II-II. [Modes for carrying out the invention]

[0018] 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, a nozzle member 3, and a cover 5. Unless otherwise specified, each component of the trigger-type liquid dispenser 1 is a molded product made of synthetic resin.

[0019] (Ejector body) The dispenser body 2 is attached to the container body A containing the liquid via a mounting cap 30. The dispenser body 2 mainly comprises a vertical supply cylinder section 10, a connecting cylinder section 20, a storage cylinder 40, a storage plunger 50, a plunger biasing member 60, an injection cylinder section 70, a trigger mechanism 80, a ball valve 90, and a storage valve 91.

[0020] In this embodiment, the central axis of the vertical supply cylinder portion 10 is referred to as axis O1. Along axis O1, the side of the container body A is the lower side, and the opposite side is the upper side. The direction along axis O1 is the vertical direction. A direction intersecting axis O1 as viewed from the vertical direction is the front-rear direction, and a direction orthogonal to the front-rear direction as viewed from the vertical direction is the left-right direction. The central axis of the storage cylinder 40 is referred to as axis O2. In this embodiment, axis O2 extends in the front-rear direction (the axial direction along the central axis of the storage cylinder 40). A direction intersecting axis O2 as viewed from the front-rear direction is the radial direction, and a direction that circulates around axis O2 as viewed from the front-rear direction is the circumferential direction. Note that axis O2 may extend in a direction intersecting the front-rear direction as viewed from the vertical direction.

[0021] The vertical supply cylinder portion 10 extends in the vertical direction and sucks up the liquid in the container body A. The vertical supply cylinder portion 10 is attached to the container body A by the attachment cap 30. The upper portion of a pipe 10a that extends in the vertical direction and sucks up the liquid from the container body A is fitted to the vertical supply cylinder portion 10. The vertical supply cylinder portion 10 is formed in a double-cylindrical shape having an outer cylinder 11 and an inner cylinder 12. The inner cylinder 12 is formed with an insertion recess 12a into which an insertion projection 11a provided on the inner surface of the outer cylinder 11 is inserted. The insertion projection 11a is formed in a cylindrical shape that extends in the vertical direction, and the insertion recess 12a is an annular recess that opens to the outer surface of the inner cylinder 12 and extends around axis O1.

[0022] The connection cylinder portion 20 extends forward (to the other side) from the upper end portion of the vertical supply cylinder portion 10. Both front and rear ends of the connection cylinder portion 20 in the front-rear direction are open. The rear end opening of the connection cylinder portion 20 opens into the vertical supply cylinder portion 10. A closing plug 100 is tightly fitted to the front end opening of the connection cylinder portion 20.

[0023] The storage cylinder 40 is located above the vertical supply cylinder 10. The rear of the storage cylinder 40 protrudes rearward (to one side) from the vertical supply cylinder 10. The rear end of the storage cylinder 40 is located behind the mounting cap 30. The front of the storage cylinder 40 protrudes forward from the vertical supply cylinder 10. The lower end of the storage cylinder 40 is integrally formed with the upper ends of the vertical supply cylinder 10 and the connecting cylinder 20, respectively. A supply hole 41 is formed at the lower end of the front end of the storage cylinder 40, extending vertically and connecting the inside of the storage cylinder 40 with the inside of the connecting cylinder 20. The supply hole 41 is located behind the closure plug 100. Inside the storage cylinder 40 (storage space 40a, described later), the liquid that has passed through the vertical supply cylinder 10 and the connecting cylinder 20 is supplied through the supply hole 41 as the trigger portion 81 moves backward.

[0024] The storage plunger 50 is disposed within the storage cylinder 40 so as to be movable in the front-rear direction. The storage plunger 50 moves rearward as liquid is supplied to the storage space 40a. The storage plunger 50 blocks communication between the vertical supply cylinder 10 and the discharge hole 4 through the connecting cylinder 20, and when it moves rearward, it allows communication between the vertical supply cylinder 10 and the discharge hole 4 through the connecting cylinder 20. The storage plunger 50 is equipped with a sliding cylinder portion 50a that slides tightly in the front-rear direction along the entire circumference of the inner surface of the storage cylinder 40. A supply hole 41 is opened in the portion of the storage cylinder 40 located in front of the sliding cylinder portion 50a (hereinafter referred to as the storage space 40a). Liquid from the vertical supply cylinder portion 10 is stored in the storage space 40a. The storage space 40a expands as the storage plunger 50 moves backward as liquid is supplied. In the storage plunger 50, a support portion 50b is formed in the portion located behind the sliding cylinder portion 50a, projecting radially outward and extending continuously around its entire circumference.

[0025] The plunger biasing member 60 biases the rearward-moving storage plunger 50 forward. In this embodiment, the plunger biasing member 60 biases the storage plunger 50 forward even before the storage plunger 50 moves rearward. The front end of the plunger biasing member 60 abuts against the support portion 50b of the storage plunger 50 from behind the support portion 50b. The rear end of the plunger biasing member 60 is fitted into the rear end of the storage cylinder 40. The rear end of the plunger biasing member 60 is exposed to the rear of the storage cylinder 40. The injection cylinder portion 70 extends forward from the storage cylinder 40. The injection cylinder portion 70 communicates with the vertical supply cylinder portion 10 through the storage space 40a, the supply hole 41, and the connecting cylinder portion 20.

[0026] The trigger mechanism 80 comprises a trigger section 81, a main cylinder 82, a main piston 83, and a biasing member 84. The trigger mechanism 80 causes the liquid to flow from inside the vertical supply cylinder section 10 through the connecting cylinder section 20 toward the ejection hole 4 by the rearward movement of the trigger section 81.

[0027] The trigger section 81 is positioned in front of the vertical supply cylinder section 10 and is movable backward while biased forward. The trigger section 81 extends vertically and is positioned below the injection cylinder section 70. The trigger section 81 is located in front of the main piston 83 and the main cylinder 82 and straddles the main piston 83 and the main cylinder 82 in the vertical direction. The upper end of the trigger section 81 is pivotally supported by the nozzle member 3 so as to be swingable in the front-rear direction. A stopper T is provided in the gap between the trigger portion 81 and the main cylinder 82 in the front-rear direction. The stopper T restricts the rearward movement of the trigger portion 81 by contacting both the trigger portion 81 and the main cylinder 82. The stopper T is detachably provided in the gap. Note that the stopper T is not required.

[0028] Here, between the lower end of the connecting cylinder portion 20 and the upper end of the mounting cap 30, there is a bottomed cylindrical main cylinder mounting portion 110 that protrudes forward from the vertical supply cylinder portion 10, opens forward, and has a closed rear end opening. The main cylinder 82 is fitted into the main cylinder mounting cylindrical portion 110. The main cylinder 82 is formed in a bottomed cylindrical shape with an opening at the front and a closed opening at the rear end. A communication passage 2a is formed in the bottom wall of both the main cylinder 82 and the main cylinder mounting cylindrical portion 110, connecting the inside of the main cylinder 82 and the inside of the vertical supply cylindrical portion 10.

[0029] The main piston 83 is fitted into the main cylinder 82 so as to be movable in the front-rear direction. The main piston 83 moves in the front-rear direction in conjunction with the front-rear movement of the trigger portion 81. The inside of the main cylinder 82 is pressurized and depressurized as the main piston 83 moves in the front-rear direction. The main piston 83 is formed in a top-ended cylindrical shape with an opening towards the rear and a closed front end opening. The front end of the main piston 83 is connected to the trigger portion 81. The main piston 83 is biased forward by the biasing force of the biasing member 84 via the trigger portion 81.

[0030] The biasing member 84 is, for example, a metal coil spring. The biasing member 84 is arranged coaxially with the main piston 83 and the main cylinder 82, and biases the trigger portion 81, to which the front end of the main piston 83 is connected, forward. The biasing member 84 is positioned between the spring holder 130, which is mounted at the front end opening of the main cylinder 82, and the trigger portion 81. The biasing member 84 is positioned so as not to come into contact with the liquid. The biasing member 84 may be made of resin, for example, or it may be formed of another elastic material.

[0031] The ball valve 90 and the storage valve 91 are located within the vertical supply cylinder 10. Within the vertical supply cylinder 10, a communication passage 2a is opened in the portion located between the ball valve 90 and the storage valve 91.

[0032] The ball valve 90 is a check valve that, when pressurized in the main cylinder 82, blocks communication between the container body A through the vertical supply cylinder 10 and the main cylinder 82, and when the pressure inside the main cylinder 82 is reduced, displaces upward, thereby allowing communication between the container body A through the vertical supply cylinder 10 and the main cylinder 82. The storage valve 91 is positioned above the ball valve 90. The storage valve 91 is a check valve that allows the supply of liquid from the vertical supply cylinder 10 through the connecting cylinder 20 to the storage space 40a, and restricts the outflow of liquid from the storage space 40a through the connecting cylinder 20 to the vertical supply cylinder 10.

[0033] (Nozzle component) The nozzle member 3 has an ejection hole 4 for ejecting liquid and is attached to the dispenser body 2. The nozzle member 3 comprises a mounting cylinder portion 120 fitted onto the injection cylinder portion 70 from the front, and a nozzle cylinder 122 attached to the front end of the mounting cylinder portion 120. The nozzle cylinder 122 has an ejection hole 4 that opens forward and ejects liquid in a forward direction.

[0034] (Attachment cap) The mounting cap 30 is formed in a topped cylindrical shape with an annular top wall. The lower end of the vertical supply cylinder portion 10 is inserted into the inside of this top wall. A restricting cylinder 31 is formed on the inner peripheral edge of the top wall, projecting upward. The upper end opening edge of the restricting cylinder 31 is in contact with or close to the outer surface of the ejector body 2 (in the illustrated example, the lower end of the outer peripheral surface of the main cylinder mounting cylinder portion 110) in the vertical direction. The restricting cylinder 31 surrounds the insertion projection 11a and insertion recess 12a of the vertical supply cylinder portion 10 around its entire circumference. Note that the restricting cylinder 31 is not required on the mounting cap 30.

[0035] (cover) The cover 5 covers the ejector body 2 with the ejection holes 4 exposed. The cover 5 covers the entirety of the ejector body 2, except for the lower end of the vertical supply cylinder 10, the entire injection cylinder 70, and the entire storage cylinder 40, from at least both sides in the left-right direction and from above.

[0036] The cover 5 is provided with end wall portions 13 that cover the rear ends of the plunger biasing member 60 and the storage cylinder 40 from behind. The end wall portion 13 contacts the rear end of the plunger biasing member 60 when it is displaced or deformed forward. In the illustrated example, the end wall portion 13 is in contact with the rear end of the plunger biasing member 60 even before it is displaced or deformed forward. The end wall portion 13 is formed in a plate shape with its front and back surfaces facing the front-rear direction. The end wall portion 13 is curved so as to exhibit a curved projection towards the rear when viewed in a vertical cross-section along the vertical direction. The end wall portion 13 is formed to be elastically deformable toward the front.

[0037] A projection 21 is formed on the end wall portion 13, projecting forward. The projection 21 has an inclined portion 21a that extends radially inward from the rear to the front. As shown in Figure 2, the projection 21 is composed of multiple plates that extend radially and radially when viewed from the front-rear direction, and one of the multiple plates extends vertically when viewed from the front-rear direction. The multiple plates intersect along axis O2. Of these plates, the plates other than the one that extends vertically when viewed from the front-rear direction extend in directions that intersect in both the vertical and left-right directions when viewed from the front-rear direction. The front and back surfaces of the plates face the circumferential direction. The plan view shape of the plate is a trapezoid with the upper base located at the front end and the lower base located at the rear end (front surface of the end wall portion 13), and the inclined portion 21a is the part corresponding to a pair of legs.

[0038] The cover 5 is provided with a locking portion 15 that slides from rear to front and moves over a locking portion 14 provided on the nozzle body 2 to lock into place.

[0039] The locking portion 14 is provided on a veneer 10b that protrudes rearward from the portion of the vertical supply cylinder 10 located above the mounting cap 30. The front and back surfaces of the veneer 10b are oriented in the vertical direction. The locking portion 14 protrudes downward from the rear end of the lower surface of the veneer 10b. The locking portion 14 has a right-angled triangular shape in a vertical cross-sectional view along the vertical direction. Of the three sides that define the right-angled triangle, the hypotenuse extends forward as it goes downward from the lower surface of the veneer 10b, one of the remaining two sides extends straight downward from the lower surface of the veneer 10b and intersects with the lower end of the hypotenuse to form the front end surface of the locking portion 14, and the other side coincides with the lower surface of the veneer 10b. The locking portion 15 is provided on the inner surface of the cover 5 in adjacent portions adjacent to both the rear end of the vertical supply cylinder portion 10 and the upper end opening edge of the regulating cylinder 31 of the mounting cap 30. The locking portion 15 protrudes upward from the adjacent portions on the inner surface of the cover 5. The rear end surface of the locking portion 15 extends straight in the vertical direction and is in contact with or close to the front end surface of the locked portion 14. The upper end surface of the locking portion 15 extends downward as it moves from the rear to the front.

[0040] In the cover 5, an elastically deformable deformable portion 16 is formed in the portion located between the end wall portion 13 and the locking portion 15. As the deformable portion 16 deforms, the end wall portion 13 and the locking portion 15 are elastically displaced relative to each other in the front-rear direction.

[0041] In the illustrated example, the cover 5 includes an insertion cylinder 17 that extends forward from the outer peripheral edge of the end wall portion 13 and into which the rear end of the storage cylinder 40 is inserted. The diameter of the rear end of the portion of the cover 5 that extends from the front of the insertion cylinder 17 is larger than the diameter of the insertion cylinder 17. The rear end edge of the portion of the cover 5 that extends from the front of the insertion cylinder 17 and the front end edge of the insertion cylinder 17 are connected via a stepped portion whose front and back surfaces face in the front-rear direction. This stepped portion is a deformable portion 16. The deformable portion 16 extends continuously along its entire circumferential length.

[0042] In this embodiment, the rear end of the plunger biasing member 60 is provided so as to be elastically displaceable forward relative to the storage cylinder 40. The plunger biasing member 60 has a rear end opening (one-end opening) 61 that opens towards the rear. As shown in Figure 2, the rear end opening 61 has a rectangular shape when viewed from the front-rear direction, with two of the four corners located at both ends in the vertical direction and the remaining two at both ends in the left-right direction. The protruding portion 21 of the end wall portion 13 is inserted into the rear end opening 61 of the plunger biasing member 60. The inclined portion 21a of the protruding portion 21 abuts against the rear end opening 61 of the plunger biasing member 60.

[0043] The plunger biasing member 60 includes a coil spring 62 and a spring holder 63. The coil spring 62 is a metal coil spring extending in the front-rear direction. The front end of the coil spring 62 abuts against the support portion 50b of the storage plunger 50 from the rear of the support portion 50b. The coil spring 62 may be made of resin, for example, or of another elastic material. The spring retainer 63 constitutes the rear end of the plunger biasing member 60. The spring retainer 63 is formed in a transversely oriented, bottomed cylindrical shape with an open front and a bottom wall 64 that closes the rear end opening. The rear end of the coil spring 62 is inserted into the spring retainer 63. The rear end of the coil spring 62 is supported on the front surface of the bottom wall 64 of the spring retainer 63. The spring retainer 63 has a rear end opening 61 that opens towards the rear. The rear end opening 61 penetrates the bottom wall 64 of the spring retainer 63 in the front-rear direction. The spring retainer 63 is fitted into the storage cylinder 40 so as to be elastically displaceable in the front-rear direction. The spring retainer 63 is fitted into the rear end of the storage cylinder 40 so as to be elastically displaceable toward the front, with its rearward movement restricted. The spring retainer 63 is provided such that when it has moved a predetermined amount toward the front, further forward movement is restricted.

[0044] (The operation of a trigger-type liquid dispenser) Next, we will describe the case in which the trigger-type liquid dispenser 1 configured as described above is used. It is assumed that the liquid is filled into each part of the trigger-type liquid dispenser 1 by operating the trigger unit 81 shown in Figure 1 multiple times.

[0045] When the trigger portion 81 is pulled and moved backward against the biasing force of the biasing member 84, the main piston 83 moves backward, and the inside of the main cylinder 82 is pressurized. As a result, the liquid inside the main cylinder 82 is supplied to the vertical supply cylinder portion 10 through the communication passage 2a. The liquid supplied to the vertical supply cylinder portion 10 pushes the ball valve 90 downward and pushes the storage valve 91 upward.

[0046] As a result, the liquid in the vertical supply cylinder 10 is supplied to the storage space 40a of the storage cylinder 40 through the connecting cylinder 20 and the supply hole 41, pressurizing the storage space 40a. As the storage space 40a is pressurized, the storage plunger 50 moves backward against the biasing force of the plunger biasing member 60, and the liquid fills the storage space 40a. As the storage plunger 50 moves backward, the liquid in the storage space 40a, now under increased pressure, reaches the ejection hole 4 through the injection cylinder 70. As a result, the liquid is ejected forward from the ejection hole 4.

[0047] As described above, each time the trigger 81 is pulled backward, liquid can be ejected from the ejection hole 4, and the storage plunger 50 can be moved backward to accumulate liquid in the storage space 40a.

[0048] Subsequently, when the trigger section 81 is released, the trigger section 81 returns to its original position forward due to the elastic restoring force (biasing force) of the biasing member 84. Consequently, the main piston 83 connected to the trigger section 81 also returns to its original position forward within the main cylinder 82. As a result, the pressure inside the main cylinder 82 decreases to a level lower than the pressure inside container body A, and the ball valve 90 rises while the storage valve 91 remains closed. Consequently, the liquid inside container body A is drawn up into the vertical supply cylinder section 10 and introduced into the main cylinder 82 through the communication passage 2a. This prepares the system for the next ejection.

[0049] When the trigger section 81 is stopped from being pulled, the supply of liquid to the storage space 40a through the vertical supply cylinder section 10 and the connecting cylinder section 20 stops, but the storage plunger 50 begins to move forward due to the biasing force of the plunger biasing member 60. At this time, the outflow of liquid from the storage space 40a into the vertical supply cylinder section 10 is restricted by the storage valve 91. As a result, the liquid filled in the storage space 40a reaches the ejection hole 4 through the injection cylinder section 70 and continues to be ejected forward through the ejection hole 4. In this way, liquid can be ejected not only when the trigger unit 81 is pulled backward, but also when the trigger unit 81 is not operated, enabling continuous ejection of liquid.

[0050] As described above, in the trigger-type liquid dispenser 1 of this embodiment, the spring receiver 63 constituting the rear end of the plunger biasing member 60 is provided so as to be elastically displaceable forward relative to the storage cylinder 40, and the end wall portion 13 of the cover 5 covers the plunger biasing member 60 from behind and contacts the spring receiver 63 when displaced forward. Therefore, for example, if the trigger-type liquid dispenser 1 falls in an inverted state, and the end wall portion 13 of the cover 5 collides with an object such as the ground and is displaced or deformed forward, the end wall portion 13 will contact the spring receiver 63. At this time, the impact force is absorbed as the spring receiver 63 is elastically displaced forward. As a result, even in a trigger-type liquid dispenser 1 having a storage plunger 50 and a storage cylinder 40, damage or disassembly can be suppressed, for example, when it falls.

[0051] A protrusion 21 is formed on the end wall portion 13 of the cover 5, and an inclined portion 21a is formed on the protrusion 21 that abuts against the rear end opening 61 of the plunger biasing member 60. Therefore, for example, even if an impact force is applied to the end wall portion 13 of the cover 5 from diagonally above and behind the object being struck, the inclined portion 21a slides within the rear end opening 61 of the plunger biasing member 60, causing the end wall portion 13 to be displaced or deformed along the front-rear direction. This makes it easier to transmit the impact force to the plunger biasing member 60 in the front-rear direction.

[0052] The protruding portion 21 is composed of multiple plates that extend radially and radially when viewed from the front-rear direction, and one of the multiple plates extends vertically when viewed from the front-rear direction. Therefore, regardless of the direction of the impact force exerted from the object to be struck to the end wall portion 13, this impact force can be distributed circumferentially with minimal bias towards the rear end opening 61 of the plunger biasing member 60 and transmitted to the plunger biasing member 60.

[0053] The plunger biasing member 60 includes a spring retainer 63 formed in the shape of a horizontally oriented bottomed cylinder, into which the rear end of a coil spring 62 is inserted, and the rear end of the coil spring 62 is supported by the bottom wall 64 of the spring retainer 63, and a rear end opening 61 that opens toward the rear is formed, and the spring retainer 63 is fitted into the storage cylinder 40 so as to be elastically displaceable in the front-rear direction. Therefore, when an impact force is applied to the end wall portion 13 of the cover 5 from an object to be struck, and the end wall portion 13 and the spring retainer 63 are displaced toward the front, etc., the coil spring 62 can be smoothly compressed and deformed along the front-rear direction, and the impact force can be reliably absorbed.

[0054] With the cover 5 positioned rearward relative to the ejector body 2, during the assembly process, even if the end wall portion 13 of the cover 5 catches on the rear end of the plunger biasing member 60 before the locking portion 15 of the cover 5 moves forward over the locked portion 14 of the ejector body 2, the deformable portion 16 of the cover 5 is elastically deformed in the front-rear direction, allowing the locking portion 15 of the cover 5 to move forward over the locked portion 14 of the ejector body 2. When an impact force is applied to the end wall portion 13 of the cover 5 by an object being struck, the deformable portion 16 is elastically deformed, thereby absorbing the impact force. This suppresses relative displacement between the cover 5 and the ejector body 2 when an impact force is applied to the end wall portion 13 of the cover 5 by an object being struck.

[0055] Although embodiments of the present invention have been described above, these embodiments are presented as examples and are not intended to limit the scope of the invention. Embodiments can be implemented in various other forms, and various omissions, substitutions, and modifications can be made without departing from the spirit of the invention. Embodiments and their modifications include, for example, those that can be easily imagined by those skilled in the art, those that are substantially the same, and those that are equivalent.

[0056] For example, the coil spring 62 and the spring retainer 63 may be formed as a single unit. The rear end opening 61 of the plunger biasing member 60 is formed on the rear surface of the bottom wall 64 of the spring retainer 63, and does not necessarily have to penetrate the bottom wall 64 of the spring retainer 63 in the front-rear direction. The plunger biasing member 60 does not necessarily have to have a rear end opening 61. The protruding portion 21 may be formed, for example, as a columnar or cylindrical shape extending in the front-rear direction. The protruding portion 21 does not need to be formed on the end wall portion 13, and the inclined portion 21a does not need to be formed on the protruding portion 21. It is not necessary to form the deformed portion 16 on the cover 5.

[0057] Furthermore, it is possible to replace the components in the above embodiments with well-known components as appropriate, without departing from the spirit of the present invention.

[0058] Examples of the present invention are as follows: <1> A sprayer body that is attached to a container body containing liquid, A nozzle member is attached to the aforementioned ejector body and has an ejection hole formed therein for ejecting liquid, The device comprises a cover that covers the main body of the ejector while the ejection holes are exposed, The aforementioned spray body is, A vertical supply cylinder that draws up the liquid inside the container, A trigger mechanism having a trigger portion that is arranged to be movable backward in a forward biased state, wherein the movement of the trigger portion backward causes the liquid to flow from the vertical supply cylinder towards the ejection hole side, The rearward movement of the trigger portion causes the liquid that has passed through the vertical supply cylinder to be supplied to the storage cylinder, A storage plunger is disposed within the storage cylinder so as to be movable in the axial direction along the central axis of the storage cylinder, and moves toward one side of the axial direction and is biased toward the other side of the axial direction as liquid is supplied into the storage cylinder; The system includes a plunger biasing member that biases the storage plunger toward the other side, The one end of the plunger biasing member is provided so as to be elastically displaceable toward the other side relative to the storage cylinder. A trigger-type liquid dispenser, wherein the cover covers the plunger biasing member from one side of the plunger biasing member and has an end wall portion that contacts the end of the plunger biasing member on the one side when the plunger biasing member is displaced or deformed on the other side. <2> The plunger biasing member has an opening at one end that opens toward the one side, The end wall portion has a projection that protrudes toward the other side and is inserted into one end opening of the plunger biasing member. The protruding portion has an inclined portion that extends radially inward, intersecting the central axis when viewed from the axial direction, as it moves from one side to the other side, and that contacts the opening at one end of the plunger biasing member. <1> The trigger-type liquid dispenser described in [reference]. <3> The aforementioned protrusion is composed of a plurality of plates that extend radially and radiate outwards when viewed from the axial direction. One of the multiple plates extends vertically when viewed from the axial direction, <2> The trigger-type liquid dispenser described in [reference]. <4> The plunger biasing member is The coil spring extending in the axial direction, The spring holder is formed in a horizontal, bottomed cylindrical shape, with the other side being open and the bottom wall closing the opening on the one side, One end of the coil spring is inserted into the spring holder. The bottom wall of the spring support is supported by one end of the coil spring, and an opening is formed at one end that opens toward the one end. The spring retainer is fitted to the storage cylinder so as to be elastically displaceable in the axial direction, <1> from <3> A trigger-type liquid dispenser as described in one of the following. <5> The cover is provided with a locking portion that is locked to a locking portion provided on the ejector body by sliding over it from one side to the other side. In the cover, an elastically deformable deformable portion is formed in the portion located between the end wall portion and the locking portion. As the deformation of the deformed portion occurs, the end wall portion and the locking portion are elastically displaced relative to each other in the axial direction, <1> from <4> A trigger-type liquid dispenser as described in one of the following. [Explanation of symbols]

[0059] 1. Trigger-type liquid dispenser 2 Squirt body 3 Nozzle component 4 Spout hole 5 Cover 10 Vertical supply cylinder section 13 End wall section 14 Locked part 15 Locking part 16. Deformed part 21 Protrusion 21a Slope 40 Storage Cylinders 50 Storage Plungers 60 Plunger biasing member 61 Rear end opening (one end opening) 62 Coil springs 63 Spring retainer (one end) 64 Bottom wall 80 Trigger Mechanism 81 Trigger section A container O2 center axis

Claims

1. A sprayer body that is attached to a container body containing liquid, A nozzle member is attached to the aforementioned ejector body and has an ejection hole formed therein for ejecting liquid, The device comprises a cover that covers the main body of the ejector while the ejection holes are exposed, The aforementioned spray body is, A vertical supply cylinder that draws up the liquid inside the container, A trigger mechanism having a trigger portion that is arranged to be movable backward in a forward biased state, wherein the movement of the trigger portion backward causes the liquid to flow from the vertical supply cylinder towards the ejection hole side, The rearward movement of the trigger portion causes the liquid that has passed through the vertical supply cylinder to be supplied to the storage cylinder, A storage plunger is disposed within the storage cylinder so as to be movable in the axial direction along the central axis of the storage cylinder, and moves toward one side of the axial direction and is biased toward the other side of the axial direction as liquid is supplied into the storage cylinder; The system includes a plunger biasing member that biases the storage plunger toward the other side, The one end of the plunger biasing member is provided so as to be elastically displaceable toward the other side relative to the storage cylinder. A trigger-type liquid dispenser, wherein the cover covers the plunger biasing member from one side of the plunger biasing member and has an end wall portion that contacts the end of the plunger biasing member on the one side when the plunger biasing member is displaced or deformed on the other side.

2. The plunger biasing member has an opening at one end that opens toward the one side, The end wall portion has a projection that protrudes toward the other side and is inserted into one end opening of the plunger biasing member. The trigger-type liquid dispenser according to claim 1, wherein the protruding portion has an inclined portion that extends radially inward, intersecting the central axis when viewed from the axial direction, as it moves from one side to the other side, and that contacts one end opening of the plunger biasing member.

3. The aforementioned protrusion is composed of a plurality of plates that extend radially and radiate outwards when viewed from the axial direction. The trigger-type liquid dispenser according to claim 2, wherein one of the multiple plate bodies extends vertically when viewed from the axial direction.

4. The plunger biasing member is The coil spring extending in the axial direction, The spring holder is formed in a horizontal, bottomed cylindrical shape, with the other side being open and the bottom wall closing the opening on the one side, One end of the coil spring is inserted into the spring holder. The bottom wall of the spring support is supported by one end of the coil spring, and an opening is formed at one end that opens toward the one end. The trigger-type liquid dispenser according to any one of claims 1 to 3, wherein the spring retainer is fitted to the storage cylinder so as to be elastically displaceable in the axial direction.

5. The cover is provided with a locking portion that is locked to a locking portion provided on the ejector body by sliding over it from one side to the other side. In the cover, an elastically deformable deformable portion is formed in the portion located between the end wall portion and the locking portion. A trigger-type liquid dispenser according to any one of claims 1 to 3, wherein the end wall portion and the locking portion are elastically displaced relative to each other in the axial direction as the deformation of the deformable portion occurs.

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