Trigger type sprayer

Abstract

To stabilize relative positions of a cover and a sprayer body regardless of a dimension of a side wall part.SOLUTION: A sprayer includes a sprayer body 2, a nozzle member 3, and a cover 5. The cover includes: a pair of side wall parts 16 which covers the sprayer body from both sides in a lateral direction; and an insertion cylinder 17 into which a rear part of a storage cylinder 40 is inserted. Restriction parts 21 which engage with each other to restrict relative movement in a vertical direction are provided at the side wall part and the sprayer body. On an inner peripheral surface of the insertion cylinder, upper support projections 22 and lower support projections 23 which separately come in contact with an outer peripheral surface of the storage cylinder from upper and lower directions are formed at a portion located at the rear relative to the restriction parts.SELECTED DRAWING: Figure 1

Description

[Technical field]

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

[0002] Conventionally, there has been known a trigger type liquid ejector that includes an ejector body, a nozzle member with an ejection hole formed therein, and a cover that covers the ejector body with the ejection hole exposed, and that is capable of ejecting liquid continuously through the ejection hole. For example, as shown in the following Patent Document 1, a configuration is known as this type of trigger type liquid ejector, in which the cover includes a pair of side walls that cover the ejector body from both the left and right sides, and the side walls and the ejector body are provided with a restricting portion that engages with each other to restrict relative movement in the up and down direction. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2023-98189 A Summary of the Invention [Problem to be solved by the invention]

[0004] In the above-mentioned trigger-type liquid ejector, for example, by making the side wall thinner or more compact in response to weight reduction of the cover and design changes to the cover, etc., the dimensions of the restricting part are restricted, and the relative position of the cover and the ejector body may become less stable. For example, if the length of the restricting part in the front-to-rear direction is shortened, the cover and the ejector body are more likely to rattle.

[0005] The present invention provides a trigger type liquid ejector capable of stabilizing the relative position between the cover and the ejector body regardless of the dimensions of the side wall portion and capable of ejecting liquid continuously. [Means for solving the problem]

[0006] A trigger type liquid ejector according to one aspect of the present invention comprises an ejector body that is attached to a container body that contains liquid, a nozzle member that is attached to the ejector body and has an ejection hole formed therein for ejecting liquid, and a cover that covers the ejector body with the ejection hole exposed. The ejector body has a vertical supply tube portion that sucks up liquid in the container body, and a trigger portion that is arranged so as to be movable rearward in a forward biased state, and a trigger mechanism that causes liquid to flow from within the vertical supply tube portion toward the ejection hole side by the rearward movement of the trigger portion, a storage cylinder extending in the front-rear direction into which liquid that has passed through the vertical supply tube portion is supplied by the rearward movement of the trigger portion, and a front-rear biasing mechanism that causes liquid to flow from within the vertical supply tube portion toward the ejection hole side by the rearward movement of the trigger portion, The cover comprises a pair of side wall portions covering the ejector body from both sides in the left-right direction perpendicular to the front-to-rear direction, and an insertion tube into which the rear of the storage cylinder is inserted, and the side wall portions and the ejector body are provided with regulating portions that engage with each other to regulate relative movement in the up-down direction, and the inner surface of the insertion tube, in a portion rearward of the regulating portions, has an upper support protrusion and a lower support protrusion that abut against the outer peripheral surface of the storage cylinder from both the up-down direction and the up-down direction, respectively.

[0007] On the inner surface of the insertion tube into which the rear of the storage cylinder is inserted, upper support protrusions and lower support protrusions are formed in the portion located rearward of the regulating portion, which abut against the outer surface of the storage cylinder from both the upward and downward directions.As a result, the cover and the ejector body are fixed over a wide range, and the relative positions of the cover and the ejector body can be stabilized regardless of the dimensions of the side wall portion.

[0008] At least one of the upper support protrusions and at least one of the lower support protrusions may be provided on each of the left and right sides of a left and right central portion of the inner circumferential surface of the insertion tube.

[0009] Since at least one upper support protrusion and one lower support protrusion are provided on each of the left and right sides of the inner surface of the insertion tube, sandwiching the left and right central portion, the relative positions of the cover and the ejector body can be reliably stabilized.

[0010] At least one of the upper support protrusion and the lower support protrusion may be formed to extend in the up-down direction and be elastically deformable in the left-right direction.

[0011] At least one of the upper support protrusions and the lower support protrusions is formed so that it can elastically deform in the left-right direction. Therefore, when an impact force from above to below is applied to the cover, for example when the trigger-type liquid sprayer is dropped upside down, at least one of the upper support protrusions and the lower support protrusions can absorb the impact force by elastically deforming in the left-right direction. Effect of the Invention

[0012] According to the above aspect of the present invention, the relative positions of the cover and the ejector body can be stabilized regardless of the dimensions of the side wall portion. [Brief description of the drawings]

[0013] [Figure 1] 1 is a vertical cross-sectional view of a trigger type liquid ejector according to an embodiment of the present invention; [Diagram 2] FIG. 2 is a front view of the cover of FIG. 1. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0014] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. 1, the trigger type liquid ejector 1 of this embodiment includes an ejector body 2, a nozzle member 3, and a cover 5. Unless otherwise specified, each component part of the trigger type liquid ejector 1 is a molded product made of synthetic resin.

[0015] (Ejector body) The ejector body 2 is attached to a container body A containing a liquid via an attachment cap 30. The ejector body 2 mainly includes a vertical supply tube portion 10, a connection tube portion 20, a storage cylinder 40, a storage plunger 50, a plunger biasing member 60, an injection tube portion 70, a trigger mechanism 80, a ball valve 90, and a storage valve 91.

[0016] In this embodiment, the central axis of the vertical supply tube portion 10 is referred to as the axis O1, the container body A side along the axis O1 is referred to as the lower side, the opposite side is referred to as the upper side, and the direction along the axis O1 is referred to as the up-down direction. A direction intersecting the axis O1 as viewed from the up-down direction is referred to as the front-rear direction, and a direction perpendicular to the front-rear direction as viewed from the up-down direction is referred to as the left-right direction. The central axis of the storage cylinder 40 is referred to as the axis O2. The axis O2 extends in the front-rear direction. A direction intersecting the axis O2 when viewed from the front-rear direction is referred to as the radial direction, and a direction rotating around the axis O2 when viewed from the front-rear direction is referred to as the circumferential direction.

[0017] The vertical supply tube portion 10 extends in the vertical direction and sucks up the liquid in the container body A. The vertical supply tube portion 10 is attached to the container body A by an 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 into the vertical supply tube portion 10. The vertical supply tube portion 10 is formed in a double tube shape having an outer tube 11 and an inner tube 12. The inner tube 12 is formed with an insertion recess 12a into which an insertion protrusion 11a provided on the inner surface of the outer tube 11 is inserted. The insertion protrusion 11a is formed in a tube shape extending in the vertical direction, and the insertion recess 12a is an annular recess that opens to the outer surface of the inner tube 12 and extends around the axis O1.

[0018] The connecting tube portion 20 extends forward from the upper end of the vertical supply tube portion 10. Both ends in the front-rear direction of the connecting tube portion 20 are open. The rear end opening of the connecting tube portion 20 opens into the vertical supply tube portion 10. A blocking plug 100 is tightly fitted into the front end opening of the connecting tube portion 20.

[0019] The storage cylinder 40 is provided above the vertical supply tube portion 10. The rear portion of the storage cylinder 40 protrudes rearward from the vertical supply tube portion 10. The rear end portion of the storage cylinder 40 is located rearward of the mounting cap 30. The front portion of the storage cylinder 40 protrudes forward from the vertical supply tube portion 10. The lower end portion of the storage cylinder 40 is integrally formed with the upper end portions of the vertical supply tube portion 10 and the connecting tube portion 20. A supply hole 41 is formed in the lower end of the front end of the storage cylinder 40, penetrating vertically and communicating between the inside of the storage cylinder 40 and the inside of the connecting cylinder portion 20. The supply hole 41 is located behind the occlusion plug 100. When the trigger portion 81 moves rearward, liquid that has passed through the vertical supply cylinder portion 10 and the connecting cylinder portion 20 is supplied through the supply hole 41 to the inside of the storage cylinder 40 (storage space 40a described below).

[0020] The storage plunger 50 is disposed in 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 portion 10 and the ejection hole 4 through the connecting cylinder portion 20, and allows communication between the vertical supply cylinder portion 10 and the ejection hole 4 through the connecting cylinder portion 20 when it moves rearward. The central axis of the ejection hole 4 is located above the axis O2. The storage plunger 50 has a sliding tube portion 50a that slides tightly in the front-rear direction over the entire circumference on the inner circumferential surface of the storage cylinder 40. A supply hole 41 opens in a portion of the storage cylinder 40 located forward of the sliding tube portion 50a (hereinafter referred to as storage space 40a). Liquid is stored in the storage space 40a from the vertical supply tube portion 10. The storage space 40a expands as the storage plunger 50 moves rearward with the supply of liquid. In the storage plunger 50, a support portion 50b is formed at a portion located rearward of the sliding cylindrical portion 50a, which protrudes radially outward and extends continuously around the entire circumference.

[0021] The plunger biasing member 60 biases the storage plunger 50 forward after it has moved backward. In this embodiment, the plunger biasing member 60 biases the storage plunger 50 forward before the storage plunger 50 moves backward. The plunger biasing member 60 is, for example, a metal coil spring. 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 injection tube portion 70 extends forward from the storage cylinder 40. The injection tube portion 70 communicates with the inside of the vertical supply tube portion 10 through the storage space 40a, the supply hole 41, and the inside of the connection tube portion 20.

[0022] The trigger mechanism 80 includes a trigger portion 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 tube portion 10 through the connecting tube portion 20 toward the nozzle hole 4 side by the rearward movement of the trigger portion 81.

[0023] The trigger portion 81 is disposed in front of the vertical supply tube portion 10 so as to be movable rearward in a forward biased state. The trigger portion 81 extends in the vertical direction and is disposed below the injection tube portion 70. The trigger portion 81 is provided 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. An upper end portion of the trigger portion 81 is journaled on the nozzle member 3 so as to be swingable in the front-rear direction. A stopper T is provided in the gap in the front-rear direction between the trigger portion 81 and the main cylinder 82. 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 provided detachably in the gap. Note that the stopper T does not necessarily have to be provided.

[0024] Here, between the lower end of the connecting tube portion 20 and the upper end of the mounting cap 30, there is provided a bottomed, cylindrical main cylinder mounting tube portion 110 that protrudes forward from the vertical supply tube portion 10, opens forward, and has a closed rear end opening. The main cylinder 82 is fitted into the main cylinder mounting tube portion 110. The main cylinder 82 is formed in a bottomed tube shape that opens forward and has a closed rear end opening. A communication passage 2a that connects the inside of the main cylinder 82 to the inside of the vertical supply tube portion 10 is formed in the bottom wall of each of the main cylinder 82 and the main cylinder mounting tube portion 110.

[0025] The main piston 83 is fitted in 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 topped cylindrical shape that opens toward the rear and has 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 urged forward by the urging force of the urging member 84 via the trigger portion 81.

[0026] The biasing member 84 is, for example, a metallic coil spring. The biasing member 84 is disposed coaxially with the main piston 83 and the main cylinder 82, and biases the trigger portion 81, to which the front end portion of the main piston 83 is connected, forward. The biasing member 84 is disposed between the spring receiver 130 attached to the front end opening of the main cylinder 82, and the trigger portion 81. The biasing member 84 is provided at a position where it does not come into contact with liquid. The biasing member 84 may be made of, for example, resin, or may be made of other elastic materials.

[0027] The ball valve 90 and the storage valve 91 are provided in the vertical supply tube portion 10. In the vertical supply tube portion 10, at a portion located between the ball valve 90 and the storage valve 91, a communication passage 2a opens.

[0028] The ball valve 90 is a check valve that blocks communication between the inside of the container body A and the inside of the main cylinder 82 through the vertical supply tube section 10 when the inside of the main cylinder 82 is pressurized, and allows communication between the inside of the container body A and the inside of the main cylinder 82 through the vertical supply tube section 10 by displacing upward when the inside of the main cylinder 82 is depressurized. The storage valve 91 is disposed above the ball valve 90. The storage valve 91 is a check valve that allows the supply of liquid from the vertical supply tube portion 10 through the connecting tube portion 20 to the storage space 40a and restricts the outflow of liquid from the storage space 40a through the connecting tube portion 20 to the vertical supply tube portion 10.

[0029] (Nozzle member) The nozzle member 3 has an ejection hole 4 for ejecting liquid, and is attached to the ejector body 2. The nozzle member 3 includes an attachment tube portion 120 fitted onto the front of the ejection tube portion 70, and a nozzle tube 122 attached to the front end of the attachment tube portion 120. The nozzle tube 122 is formed with an ejection hole 4 that opens forward and ejects liquid forward.

[0030] (Attachment cap) The mounting cap 30 is formed in a topped cylinder shape having an annular top wall. The lower end of the vertical supply tube portion 10 is inserted inside this top wall. A regulating tube 31 protruding upward is formed on the inner peripheral edge of the top wall. The upper end opening edge of the regulating tube 31 abuts or is 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 tube portion 110) in the vertical direction. The regulating tube 31 surrounds the entire circumference of the insertion protrusion 11a and the insertion recess 12a of the vertical supply tube portion 10. It is not necessary to provide the regulating tube 31 in the mounting cap 30.

[0031] (cover) The cover 5 covers the ejector body 2 while exposing the ejection hole 4. The cover 5 covers the entire vertical supply tube portion 10 of the ejector body 2 except for the lower end portion, the entire injection tube portion 70, and the entire storage cylinder 40 from at least both left and right sides and from above.

[0032] The cover 5 is provided with a locking portion 15 that is locked by sliding from the rear to the front over a locked portion 14 provided on the ejector body 2. The locked portion 14 and the locking portion 15 are located forward of the rear end of the storage cylinder 40 and below the storage cylinder 40.

[0033] The engaging portion 14 is provided on the veneer 10b that protrudes rearward from a portion of the vertical supply tube 10 that is located above the mounting cap 30. The front and back surfaces of the veneer 10b face in the vertical direction. The engaging portion 14 protrudes downward from the rear end of the lower surface of the veneer 10b. The engaging portion 14 has a right-angled triangular shape in a vertical cross section. Of the three sides that define the right-angled triangular shape, the hypotenuse extends forward as it goes downward from the lower surface of the veneer 10b, and 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 engaging 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 at a portion adjacent to both the rear end of the vertical supply tube portion 10 and the upper opening edge of the regulating tube 31 of the attachment cap 30. The locking portion 15 protrudes upward from the adjacent portion on the inner surface of the cover 5. The rear end surface of the locking portion 15 extends straight in the vertical direction and abuts against or is close to the front end surface of the locked portion 14. The upper end surface of the locking portion 15 extends downward from the rear to the front.

[0034] The cover 5 mainly includes a pair of side wall portions 16 that cover the ejector main body 2 from both the left and right sides, and an insertion tube 17 into which the rear portion of the storage cylinder 40 is inserted. The side wall portion 16 is formed in a plate shape with the front and back surfaces facing the left and right directions. The insertion tube 17 is formed in a cylindrical shape and disposed coaxially with the axis O2. The rear end opening of the insertion tube 17 is closed.

[0035] The side wall portion 16 and the ejector body 2 are provided with a restricting portion 21 which restricts the relative movement in the up and down direction by engaging with each other. The restricting portion 21 is located forward of the rear end of the storage cylinder 40 and below the storage cylinder 40. The front end of the restricting portion 21 is located forward of and above the locked portion 14 and the locking portion 15. The restricting portion 21 is composed of a pair of upper and lower rail projections 16a, 16b that protrude inward in the left-right direction (toward the ejector body 2) from the side wall portion 16 and extend in the front-rear direction, and a fitted projection 2b that protrudes in the left-right direction from the outer surface of the ejector body 2 and is fitted between the pair of upper and lower rail projections 16a, 16b.

[0036] Of the pair of upper and lower rail projections 16a, 16b, the upper rail projection 16a is formed in a plate shape with the front and back surfaces facing the up-down direction. Of the pair of upper and lower rail projections 16a, 16b, the lower rail projection 16b is formed in a plate shape with the front and back surfaces facing the up-down direction, and a protruding portion 16c that protrudes upward and extends in the front-rear direction is formed at the inner end of the upper surface in the left-right direction. The pair of upper and lower rail projections 16a, 16b straddle the upper end of the vertical supply tube portion 10 in the left-right direction when viewed from the left-right direction. The fitted projection 2b extends forward from the upper end of the connection between the vertical supply tube portion 10 and the main cylinder mounting tube portion 110. A groove portion that is recessed upward and extends in the front-rear direction is formed in the middle portion of the lower surface of the fitted projection 2b in the left-right direction. The protruding portion 16c of the lower rail projection 16b is fitted into this groove portion.

[0037] On the inner peripheral surface of the insertion tube 17, at a portion located rearward of the restricting portion 21, there are formed an upper support protrusion 22 and a lower support protrusion 23 that respectively abut against the outer peripheral surface of the storage cylinder 40 from both the up and down directions. The upper support protrusion 22 and the lower support protrusion 23 are provided at the rear end portion of the insertion tube 17.

[0038] At least one upper support protrusion 22 and at least one lower support protrusion 23 are provided on each of the left and right sides of the left and right central portion of the inner peripheral surface of the insertion tube 17. In the illustrated example, two upper support protrusions 22 and two lower support protrusions 23 are provided. The distances between each of the two upper support protrusions 22 and the central portion of the insertion cylinder 17 in the left - right direction are the same as each other. The distances between each of the two lower support protrusions 23 and the central portion of the insertion cylinder 17 in the left - right direction are the same as each other. The radial distance between the lower end portion of the upper support protrusion 22 and the axis O2 is the same as the radial distance between the upper end portion of the lower support protrusion 23 and the axis O2. The lower end portion of the upper support protrusion 22 and the upper end portion of the lower support protrusion 23 face each other in the up - down direction. The lower end portion of the upper support protrusion 22 is located below the outer peripheral surface of the upper end portion at the rear end of the storage cylinder 40. The upper end portion of the lower support protrusion 23 is located above the outer peripheral surface of the lower end portion at the rear end of the storage cylinder 40.

[0039] The upper support protrusion 22 extends straight in the up - down direction. The two lower support protrusions 23 extend in a direction approaching each other in the left - right direction as they go upward. When viewed from the front - rear direction, the length of the upper support protrusion 22 is shorter than the length of the lower support protrusion 23. The front - rear positions of the upper support protrusion 22 and the lower support protrusion 23 are the same as each other. At least one of the upper support protrusion 22 and the lower support protrusion 23 extends in the up - down direction and is formed to be elastically deformable in the left - right direction. In the illustrated example, the lower support protrusion 23 is formed to be elastically deformable in the left - right direction.

[0040] In a longitudinal cross - sectional view along the up - down direction as shown in FIG. 1, when the length of the straight line connecting the lower edge 14a of the front end face of the engaged portion 14 and the upper edge 40b of the rear end edge of the storage cylinder 40 is X, and the length of the straight line connecting the lower edge 14a of the front end face of the engaged portion 14 and the front edge 16e on the upper surface of the lower rail protrusion 16b is Y, then 1 / 3 < Y / X < 2 / 3, preferably 1 / 3 < Y / X < 1 / 2 is satisfied. Because Y / X is greater than 1 / 3, the cover 5 can be attached to the ejector body 2; because Y / X is less than 2 / 3, the relative position of the cover 5 and the ejector body 2 becomes less stable, and the effect of the trigger-type liquid ejector 1 of this embodiment, which will be described later, is effectively achieved; when Y / X is less than 1 / 2, the relative position of the cover 5 and the ejector body 2 becomes even less stable, and the effect of the trigger-type liquid ejector 1 of this embodiment is significantly achieved.

[0041] (Function of trigger-type liquid ejector) Next, a case will be described where the trigger type liquid ejector 1 configured as described above is used. It is assumed that liquid is filled into each part of the trigger type liquid ejector 1 by operating the trigger part 81 shown in FIG.

[0042] 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 in the main cylinder 82 is supplied into the vertical supply tube portion 10 through the communication passage 2a. The liquid supplied into the vertical supply tube portion 10 presses the ball valve 90 downward and pushes the storage valve 91 up.

[0043] As a result, the liquid in the vertical supply tube portion 10 is supplied to the storage space 40a of the storage cylinder 40 through the connecting tube portion 20 and the supply hole 41, and the storage space 40a is pressurized. As the storage space 40a is pressurized, the storage plunger 50 moves rearward against the biasing force of the plunger biasing member 60, and the liquid fills the storage space 40a. As the storage plunger 50 moves rearward, the liquid in the storage space 40a, whose pressure has increased, reaches the ejection hole 4 through the injection tube portion 70. As a result, the liquid is ejected forward from the ejection hole 4.

[0044] As described above, every time the trigger portion 81 is pulled rearward, liquid can be ejected from the ejection hole 4, and the storage plunger 50 can be moved rearward to store liquid in the storage space 40a.

[0045] Thereafter, when the trigger portion 81 is released, the trigger portion 81 moves forward due to the elastic restoring force (biasing force) of the biasing member 84, and the main piston 83 connected to the trigger portion 81 also moves forward in the main cylinder 82. As a result, the pressure inside the main cylinder 82 is reduced to a pressure lower than the pressure inside the container body A, and the ball valve 90 rises while the storage valve 91 remains closed. Therefore, the liquid inside the container body A is sucked up into the vertical supply tube portion 10 and introduced into the main cylinder 82 through the communication passage 2a. This makes it possible to prepare for the next ejection.

[0046] When the pulling of the trigger portion 81 is stopped, the supply of liquid to the storage space 40a through the vertical supply tube portion 10 and the connecting tube portion 20 stops, but the storage plunger 50 starts 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 to the vertical supply tube portion 10 is regulated by the storage valve 91. As a result, the liquid filled in the storage space 40a reaches the ejection hole 4 through the injection tube portion 70 and continues to be ejected forward through the ejection hole 4. In this way, liquid can be ejected not only when the trigger portion 81 is pulled rearward, but also when the trigger portion 81 is not operated, and liquid can be ejected continuously.

[0047] As described above, according to the trigger-type liquid sprayer 1 of this embodiment, on the inner surface of the insertion tube 17 into which the rear of the storage cylinder 40 is inserted, upper support protrusions 22 and lower support protrusions 23 that abut against the outer surface of the storage cylinder 40 from both the upper and lower directions are formed in the portion located rearward of the regulating portion 21.As a result, the cover 5 and the sprayer body 2 are fixed over a wide range, and the relative positions of the cover 5 and the sprayer body 2 can be stabilized regardless of the dimensions of the side wall portion 16.

[0048] Since at least one upper support protrusion 22 and one lower support protrusion 23 are provided on each of the left and right sides of the inner surface of the insertion tube 17, sandwiching the left and right central portion, the relative positions of the cover 5 and the ejector main body 2 can be reliably stabilized.

[0049] At least one of the upper support protrusions 22 and the lower support protrusions 23 is formed to be elastically deformable in the left-right direction, so that when an impact force from above to below is applied to the cover 5, for example when the trigger-type liquid sprayer 1 is dropped upside down, at least one of the upper support protrusions 22 and the lower support protrusions 23 can absorb the impact force by elastically deforming in the left-right direction.

[0050] Although the 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. The embodiments can be implemented in various other forms, and various omissions, substitutions, and modifications can be made without departing from the gist of the invention. The embodiments and their modifications include, for example, those that can be easily imagined by a person skilled in the art, those that are substantially the same, those that are within the scope of the equivalents, and the like.

[0051] For example, one upper support protrusion 22 and one lower support protrusion 23 may be provided. The upper support protrusion 22 and the lower support protrusion 23 may be formed so as not to be elastically deformable.

[0052] In addition, the components in the above-described embodiments can be replaced with well-known components as appropriate without departing from the spirit of the present invention. [Explanation of symbols]

[0053] 1 Trigger-type liquid ejector 2 Squirt body 3 Nozzle material 4 Spout hole 5 Cover 10 Vertical supply tube 16 Side wall 17 Insertion tube 21 Regulatory Department 22 Upper support protrusion 23 Lower support protrusion 40 Storage Cylinder 50 Reservoir Plunger 60 Plunger biasing member 80 Trigger Mechanism 81 Trigger section A Container body O2 axis

Claims

1. An ejector body that is attached to a container that contains a liquid; a nozzle member attached to the ejector body and having an ejection hole for ejecting liquid; a cover that covers the ejector body while exposing the ejection hole; The ejector body includes: A vertical supply tube portion that sucks up the liquid in the container body; a trigger mechanism including a trigger portion that is arranged to be movable rearward in a forward biased state, and that causes liquid to flow from inside the vertical supply tube portion toward the nozzle hole side by the rearward movement of the trigger portion; a storage cylinder extending in a front-rear direction into which the liquid that has passed through the vertical supply tube portion is supplied as the trigger portion moves rearward; a storage plunger that is disposed in the storage cylinder so as to be movable in a forward and backward direction and that moves rearward and is biased forward as liquid is supplied into the storage cylinder; The cover is A pair of side wall portions covering the ejector main body from both sides in a left-right direction perpendicular to the front-rear direction; An insertion tube into which the rear portion of the storage cylinder is inserted, The side wall portion and the ejector main body are provided with a restricting portion that restricts relative movement in the up-down direction by engaging with each other, A trigger-type liquid ejector, in which an upper support protrusion and a lower support protrusion are formed on the inner surface of the insertion tube, in a portion located rearward of the regulating portion, which abut against the outer surface of the storage cylinder from both the upward and downward directions.

2. 2. The trigger-type liquid ejector according to claim 1, wherein at least one of the upper support protrusions and at least one of the lower support protrusions are provided on both left and right sides of a left-right central portion of the inner circumferential surface of the insertion tube.

3. 3. The trigger-type liquid ejector according to claim 2, wherein at least one of the upper support protrusion and the lower support protrusion extends in the up-down direction and is formed to be elastically deformable in the left-right direction.

Images