Trigger-type liquid ejector

Abstract

To provide a trigger type liquid ejector capable of suppressing a problem that a lid member opens unintentionally.SOLUTION: A nozzle member 3 has a nozzle body in which ejection holes are arranged, and a nozzle cover 32 which is rotatable in a nozzle circumferential direction; a lid member 6 has a lid body 61 that closes the ejection holes from front, a rotating shaft 62, and a tongue piece 63 that protrudes outward in a nozzle radial direction from the lid body 61 and is positioned more inward in the nozzle radial direction than an outer circumferential surface of the nozzle cover 32; the nozzle cover 32 has an inclined surface 32c that faces the tongue piece 63 in a nozzle circumferential direction and protrudes forward as it moves away from the tongue piece 63 in the nozzle circumferential direction; the tongue piece 63 and the inclined surface 32c are disposed at different positions in the nozzle circumferential direction; and the nozzle cover 32 rotates in the nozzle circumferential direction between a standby position in which the lid body 61 blocks the ejection holes and an ejection position in which the tongue piece 63 rises forward upon contact with the inclined surface 32c, causing the lid body 61 to rotate around the rotating shaft 62 and open the ejection holes.SELECTED DRAWING: Figure 3

Description

[Technical field]

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

[0002] A trigger-type liquid ejector is known that sucks up liquid from a container by operating a trigger part and ejects the liquid from an ejection hole. The trigger-type liquid ejector includes an ejector body that is attached to a container containing the liquid, and a nozzle member that is attached to the ejector body and has an ejection hole formed therein.

[0003] The nozzle head of the trigger-type liquid ejector described in Patent Document 1 is equipped with a cover plate that can open and close the ejection hole. By closing the ejection hole with the cover plate when not in use, problems such as liquid drying and solidifying in the ejection hole are suppressed. A finger hook is formed on the lower end of the cover plate, and the finger hook protrudes downward from the outer circumferential surface of the nozzle head. A user can easily open the cover plate by hooking a finger on the finger hook. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 9-313998 Summary of the Invention [Problem to be solved by the invention]

[0005] However, because the finger hook protrudes outward from the nozzle, there is a risk that the cover plate (cover member) may be opened unintentionally if an object hits the finger hook.

[0006] An object of the present invention is to provide a trigger-type liquid ejector that can prevent the lid member from opening unintentionally. [Means for solving the problem]

[0007] (1) One aspect of the trigger type liquid ejector of the present invention comprises an ejector body attached to a container body containing liquid, a nozzle member attached to the ejector body and extending in a front-rear direction along a nozzle axis, and a cover member provided on the nozzle member or the ejector body and capable of opening and closing an ejection hole opening toward the front of the nozzle member, the ejector body comprising a vertical supply tube portion that sucks up liquid in the container body, and a trigger portion arranged 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, the nozzle member comprising a nozzle body in which the ejection hole is arranged, and a nozzle member arranged outside the nozzle body in a nozzle radial direction perpendicular to the nozzle axis, the nozzle member having a nozzle hole around the nozzle axis, the nozzle member having a nozzle hole around the nozzle axis, the nozzle member having a nozzle body in which the ejection hole is arranged, the nozzle member having a nozzle hole around the nozzle axis, the nozzle member having a nozzle hole around the nozzle axis, the nozzle member having a nozzle body in which the ejection hole is arranged, the nozzle member having a nozzle hole around the nozzle axis, the nozzle member having a nozzle hole around the nozzle axis, the nozzle member having a nozzle member arranged outside the nozzle body in a nozzle radial direction perpendicular to the nozzle axis, the nozzle member having a nozzle hole around the nozzle axis, the nozzle member having a nozzle hole around the nozzle axis, the nozzle member having a nozzle member arranged outside the nozzle body in which the ejection hole is arranged, the nozzle member having a nozzle hole around the nozzle axis .... and a nozzle cover that can rotate in a nozzle circumferential direction, the lid member having a lid body that blocks the nozzle hole from the front, a rotation axis that rotates the lid body, and a tongue that protrudes outward in the nozzle radial direction from the lid body and is positioned inward in the nozzle radial direction than the outer circumferential surface of the nozzle cover, the nozzle cover having an inclined surface that faces the tongue from the nozzle circumferential direction and protrudes forward as it moves away from the tongue in the nozzle circumferential direction, the nozzle cover having the tongue and the inclined surface positioned at different positions in the nozzle circumferential direction, and the nozzle cover rotates in the nozzle circumferential direction between a standby position in which the lid body blocks the nozzle hole and an ejection position in which the tongue protrudes forward due to contact with the inclined surface, causing the lid body to rotate around the rotation axis to open the ejection hole.

[0008] In the trigger-type liquid ejector of the present invention, when the nozzle cover is rotated from the standby position to the ejection position in the nozzle circumferential direction, the inclined surface facing the tongue from the nozzle circumferential direction comes into contact with the tongue as the nozzle cover rotates, and further pushes the tongue forward. As the tongue rises and the lid member rises, the user can easily open the lid member.

[0009] The tongue of the lid member is disposed radially inward of the nozzle cover's outer circumferential surface. In other words, the tongue does not protrude radially outward from the nozzle cover's outer circumferential surface. Therefore, when the nozzle cover is in the standby position and the lid body (lid member) is blocking the nozzle hole, the tongue is prevented from hitting anything, and the lid member is prevented from opening unintentionally.

[0010] (2) The trigger-type liquid ejector may further include a stopper member connected to the nozzle cover and capable of restricting the backward movement of the trigger portion, and when the nozzle cover is in the standby position, the stopper member may be positioned behind the trigger portion to restrict the backward movement of the trigger portion, and when the nozzle cover is in the ejection position, the stopper member may be moved from behind the trigger portion to allow the backward movement of the trigger portion.

[0011] In this case, when the nozzle cover is in the standby position and the lid member is blocking the nozzle hole (hereinafter, sometimes simply referred to as the nozzle hole closed state), the stopper member restricts the rearward movement of the trigger portion. In other words, unless the rearward movement of the trigger portion is restricted by the stopper member, the nozzle hole cannot be blocked by the lid member.

[0012] According to the above configuration, it is possible to prevent the trigger part from being moved backward with the nozzle hole remaining in the closed state, which would cause liquid to accumulate in the liquid path of the trigger mechanism, or to prevent the internal pressure from increasing, etc. This prevents problems such as liquid dripping from the nozzle hole or being sprayed unintentionally when the nozzle cover is in the spray position and the lid member opens the nozzle hole (hereinafter, sometimes simply referred to as the nozzle hole open state).

[0013] In addition, the nozzle cover and the stopper member rotate together, improving visibility, allowing the user to easily tell whether the nozzle cover is in the standby position (the nozzle holes are closed) or the nozzle position (the nozzle holes are open).

[0014] (3) In the above-mentioned trigger-type liquid ejector, the ejector body may be provided with a storage cylinder having a supply hole communicating with the vertical supply tube portion, in which liquid that has passed through the vertical supply tube portion is supplied to the interior through the supply hole as the trigger portion moves rearward, and a storage plunger that is arranged within the storage cylinder so as to be movable in an axial direction along the central axis of the storage cylinder, and moves toward one side in the axial direction as liquid is supplied into the storage cylinder and is urged toward the other side.

[0015] In this case, by operating the trigger, it is possible to eject the liquid from the ejection hole while storing the liquid in the storage cylinder. Furthermore, even if the trigger is not operated, it is possible to eject the liquid by using the storage plunger. Therefore, it is possible to perform continuous ejection of the liquid.

[0016] In addition, in a trigger-type liquid ejector capable of continuous ejection of liquid in this manner, if the trigger is moved backward when the ejection hole is in a closed state, liquid may accumulate in the storage space in the storage cylinder, and the liquid may eject as soon as the ejection hole is opened. In this regard, according to the present invention, the stopper member restricts the backward movement of the trigger, thereby preventing the above-mentioned problem.

[0017] (4) In the above trigger-type liquid ejector, the nozzle cover may have a tongue cover portion that covers at least a portion of the tongue from the outside in the nozzle radial direction when the nozzle cover is in the standby position.

[0018] In this case, when the nozzle cover is in the standby position and the lid member is closing the nozzle hole, the tongue cover portion reliably prevents objects from hitting the tongue. Effect of the Invention

[0019] According to the trigger type liquid ejector of the above aspect of the present invention, the problem of the cover member opening unintentionally can be suppressed. [Brief description of the drawings]

[0020] [Figure 1] FIG. 1 is a cross-sectional view (longitudinal cross-sectional view) showing a trigger-type liquid ejector of the present embodiment, showing a standby position of a nozzle cover (a state in which ejection holes are closed). [Diagram 2] Figure 2 is a front view of parts of the trigger-type liquid ejector of this embodiment (main parts, specifically, part of the nozzle member, the stopper member, and part of the trigger portion) viewed from the front, showing the standby position of the nozzle cover (the ejection holes are closed). [Diagram 3] Fig. 3(a) is a front view of the nozzle member and the cover member as seen from the front, and Fig. 3(b) is a bottom view of the nozzle member and the cover member as seen from below. Both Fig. 3(a) and (b) show the standby position of the nozzle cover, and the stopper member is omitted from the illustration. [Figure 4] Fig. 4(a) is a front view of the nozzle member and the cover member as seen from the front, and Fig. 4(b) is a bottom view of the nozzle member and the cover member as seen from the bottom. Both Fig. 4(a) and (b) show the nozzle cover in the middle of rotating and moving from the standby position to the ejection position, and the stopper member is omitted from the illustration. [Diagram 5] Fig. 5(a) is a front view of the nozzle member and the cover member as seen from the front, and Fig. 5(b) is a bottom view of the nozzle member and the cover member as seen from below. Both Fig. 5(a) and (b) show the ejection position of the nozzle cover, and the stopper member is omitted. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0021] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of a trigger type liquid ejector according to the present invention will be described with reference to the drawings. In this embodiment, a ejection container having a trigger type liquid ejector attached to a container body will be described as an example.

[0022] As shown in Figure 1, the trigger-type liquid ejector 1 of this embodiment comprises a ejector body 2 that is attached to a container body A containing liquid, a nozzle member 3 that is attached to the ejector body 2 and has ejection holes 4 for ejecting the liquid, a stopper member 5 connected to the nozzle member 3, and a lid member 6 provided on the nozzle member 3. Unless otherwise specified, each component part of the trigger type liquid ejector 1 is a molded product made of synthetic resin.

[0023] (Ejector body) The ejector main body 2 includes a vertical supply tube portion 10, a connecting tube portion 20, an attachment cap 30, a storage cylinder 40, a storage plunger 50, a biasing member 60, an injection tube portion 70, a trigger mechanism 80, a ball valve 90, a storage valve 91, and a cover body 95.

[0024] In this embodiment, the central axis of the vertical supply tube portion 10 is defined as an axis O1, the side of the container body A along this axis O1 is called the lower side, the opposite side is called the upper side, and the direction along the axis O1 is called the up-down direction. In addition, in a plan view seen from the up-down direction, a direction intersecting the axis O1 is called the front-rear direction, and a direction perpendicular to both the up-down direction and the front-rear direction is called the left-right direction.

[0025] Furthermore, in this embodiment, the central axis of the storage cylinder 40 is defined as an axis O2. In this embodiment, the axis O2 extends in the front-rear direction. Therefore, in this embodiment, the front-rear direction corresponds to the axial direction along the central axis of the storage cylinder 40. In this embodiment, the rear corresponds to one side of the axial direction along the central axis of the storage cylinder 40, and the front corresponds to the other side of the axial direction along the central axis of the storage cylinder 40. However, the axial direction along the axis O2 does not have to coincide with the front-rear direction.

[0026] 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 11 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.

[0027] A connecting tube portion 20 extending forward is provided at the upper end of the vertical supply tube portion 10. The connecting tube portion 20 is tubular and extends in the front-rear direction, and communicates with the interior of the vertical supply tube portion 10. The connecting tube portion 20 has an opening portion 21 that opens to the front of the ejector main body 2. A blocking plug 100 is attached to the opening portion 21 of the connecting tube portion 20 from the front, blocking the opening portion 21.

[0028] A cylinder tube portion 110 is provided below the connection tube portion 20 and above the mounting cap 30. The cylinder tube portion 110 protrudes forward from the vertical supply tube portion 10 and opens forward. The main cylinder 82 is fitted into the cylinder tube portion 110. The main cylinder 82 is formed in a bottomed tube shape that opens forward and is closed at the rear. The inside of the main cylinder 82 is connected to the inside of the vertical supply tube portion 10.

[0029] The storage cylinder 40 is disposed above the vertical supply tube portion 10 and the connecting tube portion 20. The storage cylinder 40 extends in the front-rear direction and is disposed in front of and behind the vertical supply tube portion 10 so as to straddle the vertical supply tube portion 10 in the front-rear direction. In the illustrated example, the storage cylinder 40 is disposed approximately parallel to the connecting tube portion 20 and the cylinder tube portion 110. Furthermore, the lower end portion of the storage cylinder 40 is integrally formed with the upper end portion of the connecting tube portion 20.

[0030] The liquid that has passed through the vertical supply tube portion 10 and the connecting tube portion 20 is supplied to the inside of the storage cylinder 40 (a storage space 40a described later) by the rearward movement of the trigger portion 81. Specifically, the storage cylinder 40 has a supply hole 41 that communicates with the inside of the connecting tube portion 20. The supply hole 41 is located in a lower portion of the front end portion of the storage cylinder 40. The supply hole 41 opens to a portion located rearward of the occlusion plug 100. The supply hole 41 communicates with the vertical supply tube portion 10 through the connecting tube portion 20. With the above configuration, it is possible to supply liquid that has passed through the vertical supply tube portion 10 and the connecting tube portion 20 into the storage cylinder 40 through the supply hole 41.

[0031] The storage plunger 50 is disposed in the storage cylinder 40 so as to be movable in the axial direction (front-rear direction) along the axis O2. The storage plunger 50 is in liquid-tight contact with the inner peripheral surface of the storage cylinder 40. The storage plunger 50 slides in the front-rear direction within the storage cylinder 40.

[0032] The storage plunger 50 moves rearward as liquid is supplied into the storage cylinder 40. The storage plunger 50 blocks communication between the interior of the vertical supply tube portion 10 and the ejection hole 4 through the interior of the connecting tube portion 20, and allows communication between the interior of the vertical supply tube portion 10 and the ejection hole 4 through the interior of the connecting tube portion 20 when it moves rearward.

[0033] Specifically, when the storage plunger 50 is disposed at the forwardmost position in the storage cylinder 40, it blocks communication between the interior of the vertical supply tube section 10 and the interior of the injection tube section 70 through the interior of the connection tube section 20. When the storage plunger 50 is moved rearward from the forwardmost position, it allows communication between the interior of the vertical supply tube section 10 and the ejection hole 4 through the interior of the connection tube section 20 and the injection tube section 70. Note that, within the storage cylinder 40, the space located forward of the storage plunger 50 functions as a storage space 40a.

[0034] The liquid that has passed through the vertical supply tube portion 10 and the connecting tube portion 20 and has passed through the supply hole 41 flows into the storage space 40a and is stored therein. The storage space 40a expands as the storage plunger 50 moves rearward due to the supply of liquid. The storage space 40a can also communicate with the inside of the injection tube portion 70 as the storage plunger 50 moves rearward.

[0035] The biasing member 60 biases the storage plunger 50 forward. The biasing member 60 is disposed rearward of the storage plunger 50 within the storage cylinder 40. The biasing member 60 biases the storage plunger 50 forward in the initial state before the trigger portion 81 is operated. As a result, the storage plunger 50 is disposed at the frontmost position.

[0036] In this embodiment, the biasing member 60 is a metallic coil spring disposed coaxially with the axis O2. However, the biasing member 60 is not limited to this, and may be, for example, a resin spring or other elastic members.

[0037] In the storage cylinder 40 and the storage plunger 50 configured as described above, the liquid can be pressurized in the storage space 40a until the storage plunger 50 moves backward. After that, when the liquid pressure in the storage space 40a reaches a predetermined value, the storage plunger 50 moves backward against the biasing member 60. This allows the storage space 40a to communicate with the inside of the injection tube portion 70, and the liquid that has passed through the inside of the vertical supply tube portion 10, the inside of the connection tube portion 20, the supply hole 41, and the storage space 40a can be supplied to the ejection hole 4 side through the inside of the injection tube portion 70. Therefore, the storage plunger 50 can function as a pressure accumulator valve.

[0038] The injection tube portion 70 extends forward from the storage cylinder 40. The injection tube portion 70 communicates with the interior of the vertical supply tube portion 10 through the storage cylinder 40 and the connecting tube portion 20. This allows the injection tube portion 70 to guide the liquid that has passed through the vertical supply tube portion 10, the connecting tube portion 20, and the storage cylinder 40 to the ejection hole 4.

[0039] The trigger mechanism 80 includes a trigger portion 81, a main cylinder 82, a main piston 83, and a biasing body 84. The trigger mechanism 80 is capable of circulating the liquid from inside the vertical supply tube portion 10 through the connecting tube portion 20, the storage cylinder 40, and the injection tube portion 70 toward the ejection hole 4 side by moving the trigger portion 81 rearward.

[0040] The trigger portion 81 is located forward of the vertical supply tube portion 10. The trigger portion 81 is disposed so as to be movable rearward in a forward biased state. The trigger portion 81 is formed to extend in the vertical direction, and is disposed below the injection tube portion 70. Specifically, the trigger portion 81 extends forward as it extends downward. An upper end portion of the trigger portion 81 is journaled to a lower end portion of the nozzle body 31, which will be described later, so as to be swingable in the front-rear direction. The trigger portion 81 is disposed in front of the main cylinder 82.

[0041] The main piston 83 is disposed inside the main cylinder 82 so as to be movable in the front-rear direction. The main piston 83 is movable in the front-rear direction in conjunction with the swinging of the trigger portion 81. As a result, 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 is open to the rear and closed at the front.

[0042] The biasing body 84 is, for example, a metallic coil spring. The biasing body 84 is disposed within the main cylinder 82, inside the piston guide tube 82a that is disposed in the front-rear direction, and inside the main piston 83. The rear end of the biasing body 84 contacts the bottom wall of the piston guide tube 82a, and the front end of the biasing body 84 contacts the top wall of the main piston 83. The biasing body 84 is disposed in a state compressed in the front-rear direction. As a result, the biasing body 84 biases the main piston 83 and the trigger portion 81 forward.

[0043] The ball valve 90 and the storage valve 91 are provided in the vertical supply tube portion 10 . When the inside of the main cylinder 82 is pressurized, the ball valve 90 comes into contact (seats) with the valve seat 10a in the vertical supply tube section 10 from above, thereby blocking communication between the inside of the container body A and the inside of the main cylinder 82 through the inside of the vertical supply tube section 10. When the inside of the main cylinder 82 is depressurized, the ball valve 90 moves upward away from the valve seat 10a, thereby allowing communication between the inside of the container body A and the inside of the main cylinder 82 through the inside of the vertical supply tube section 10. The ball valve 90 is a check valve that allows liquid to flow in only one direction.

[0044] A storage valve 91 is disposed above the ball valve 90. The storage valve 91 allows communication between the inside of the connecting tube portion 20 and the inside of the main cylinder 82 through the inside of the vertical supply tube portion 10 when the inside of the main cylinder 82 is pressurized. The storage valve 91 also blocks communication between the inside of the connecting tube portion 20 and the inside of the main cylinder 82 through the inside of the vertical supply tube portion 10 when the inside of the main cylinder 82 is depressurized. The storage valve 91 is a check valve that allows the supply of liquid from the inside of the vertical supply tube portion 10 through the inside of the connecting tube portion 20 to the inside of the storage cylinder 40, and regulates the outflow of liquid from the inside of the storage cylinder 40 to the inside of the vertical supply tube portion 10 through the inside of the connecting tube portion 20.

[0045] The cover body 95 is formed so as to cover the entire vertical supply tube portion 10 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. In this embodiment, the cover body 95 also covers the above-mentioned components from the rear.

[0046] (Nozzle member) The nozzle member 3 has a nozzle body 31 in which the ejection holes 4 are arranged, and a nozzle cover 32. In this embodiment, the central axis of the ejection holes 4 is defined as a nozzle axis O3. The nozzle axis O3 extends in the front-rear direction. The nozzle member 3 also extends in the front-rear direction along the nozzle axis O3. The ejection holes 4 are arranged at the front end of the nozzle member 3 and open toward the front. The front-rear direction in which the nozzle axis O3 extends may be referred to as the nozzle axis direction.

[0047] In this embodiment, the direction perpendicular to the nozzle axis O3 when viewed from the front-rear direction is called the nozzle radial direction. In the nozzle radial direction, the direction approaching the nozzle axis O3 is called the inner side of the nozzle radial direction, and the direction away from the nozzle axis O3 is called the outer side of the nozzle radial direction.

[0048] In addition, the direction rotating around the nozzle axis O3 is referred to as the nozzle circumferential direction. In this embodiment, in a front view of the nozzle member 3 as seen from the front as shown in Fig. 2, the counterclockwise direction around the nozzle axis O3 is referred to as one side of the nozzle circumferential direction, and the clockwise direction around the nozzle axis O3 is referred to as the other side of the nozzle circumferential direction.

[0049] As shown in FIG. 1, the nozzle body 31 is attached to the injection tube portion 70 from the front. In this way, the nozzle member 3 is attached to the ejector body 2. The nozzle body 31 includes a wall portion 33 located forward of the injection opening 71 of the injection tube portion 70 and arranged to face the injection opening 71, a rear relay tube portion 34 extending rearward from the wall portion 33 and fitted to the injection tube portion 70, a front relay tube portion 35 extending forward from the wall portion 33, an injection tube 36 arranged within the front end portion of the front relay tube portion 35 and having an injection hole 4 formed therein, and a support tube 37 fitted to the front relay tube portion 35. The rear relay tube portion 34, the front relay tube portion 35, the injection tube 36, and the support tube 37 are arranged coaxially with each other with the nozzle axis O3 as a common axis.

[0050] The interior of the front relay tube portion 35 communicates with the interior of the ejection tube portion 70 through a communication hole 33a formed in the wall portion 33. The interior of the front relay tube portion 35 and the ejection hole 4 also communicate with each other through a plurality of grooves 35a that are provided in the front relay tube portion 35 and arranged at intervals in the nozzle circumferential direction.

[0051] The support cylinder 37 has an annular mounting cylinder portion 38 centered on the nozzle axis O3, and a front wall 39 disposed in front of the mounting cylinder portion 38 and connected to the mounting cylinder portion 38. In this embodiment, the support cylinder 37 (the mounting cylinder portion 38 and the front wall 39) are integrally formed from a single member.

[0052] The mounting cylinder portion 38 is attached to the front relay cylinder portion 35 in a state in which relative rotation in the nozzle circumferential direction with respect to the front relay cylinder portion 35 is restricted. In the illustrated example, the mounting cylinder portion 38 has a multi-tubular shape centered on the nozzle axis O3.

[0053] The front wall 39 is disposed in front of the mounting cylinder portion 38. A rear end portion of the front wall 39 is connected to the mounting cylinder portion 38. The front wall 39 is a wall portion extending forward from the mounting cylinder portion 38. As shown in Fig. 2, the front wall 39 has a recess 39a that opens to a front end surface facing forward of the front wall 39, and a pair of steps 39b, 39c that are disposed at the outer end portion of the front wall 39 in the nozzle radial direction and face in the nozzle circumferential direction.

[0054] The recess 39a is disposed in the center of the front wall 39 in the left-right direction. The recess 39a is also provided penetrating the front wall 39 in the up-down direction. By providing such recess 39a, the front wall 39 is divided into a left wall portion and a right wall portion. The shape of the inner periphery of the recess 39a corresponds to the shape of the outer periphery of the cover member 6. The cover member 6 is fitted into the recess 39a. Also, as shown in FIG. 1, the front end portion of the front relay tube portion 35 and the ejection tube 36 are disposed behind the cover member 6 in the recess 39a. That is, the ejection hole 4 is disposed in the recess 39a.

[0055] 2, the pair of steps 39b, 39c includes a first step 39b and a second step 39c. The first step 39b and the second step 39c are disposed on opposite sides of the nozzle axis O3 in the left-right direction. The pair of steps 39b, 39c are disposed at the upper end of the front wall 39. The first step 39b faces one side in the nozzle circumferential direction, and the second step 39c faces the other side in the nozzle circumferential direction.

[0056] 1 and 2, the nozzle cover 32 has a cylindrical shape centered on the nozzle axis O3. The nozzle cover 32 is fitted onto the support cylinder 37. In this embodiment, the nozzle cover 32 is fitted onto the support cylinder 37, i.e., the nozzle body 31, so as to be slidable in the nozzle circumferential direction. In other words, the nozzle cover 32 is disposed outside the nozzle body 31 in the nozzle radial direction, and is rotatable in the nozzle circumferential direction. The nozzle cover 32 surrounds the mounting cylinder portion 38 and the front wall 39 of the support cylinder 37 from the outside in the nozzle radial direction along the nozzle circumferential direction.

[0057] Specifically, the nozzle cover 32 is rotatable in the nozzle circumferential direction centered on the nozzle axis O3 between a standby position shown in Figures 2 and 3(a) and (b) and an ejection position shown in Figures 5(a) and (b).

[0058] As shown in FIG. 2, nozzle cover 32 has a pair of abutment portions 32a, 32b that protrude inward in the nozzle radial direction from the peripheral wall of nozzle cover 32, an inclined surface 32c that is located at the front end of nozzle cover 32 and faces forward, a notch portion 32d that is located at the front end of nozzle cover 32 and penetrates the peripheral wall of nozzle cover 32 in the nozzle radial direction, and a tongue cover portion 32e that is located at the front end of nozzle cover 32.

[0059] The pair of contact portions 32a, 32b includes a first contact portion 32a and a second contact portion 32b. The first contact portion 32a and the second contact portion 32b are disposed apart from each other in the nozzle circumferential direction. The first contact portion 32a faces the other side in the nozzle circumferential direction, and the second contact portion 32b faces one side in the nozzle circumferential direction.

[0060] 2 and 3(a), when the nozzle cover 32 is placed in the standby position, the first contact portion 32a faces (is close to) or contacts the first step portion 39b with a gap in the nozzle circumferential direction, thereby restricting the nozzle cover 32 placed in the standby position from rotating further to the other side in the nozzle circumferential direction.

[0061] 5(a), when the nozzle cover 32 is placed at the ejection position, the second contact portion 32b faces (is close to) or contacts the second step portion 39c with a gap in the nozzle circumferential direction, thereby restricting the nozzle cover 32 placed at the ejection position from rotating further to one side in the nozzle circumferential direction.

[0062] As shown in Fig. 2 and Fig. 3(a), the inclined surface 32c is located on one side of the first contact portion 32a in the nozzle circumferential direction and on the other side of the second contact portion 32b in the nozzle circumferential direction. In the front view shown in Fig. 2 and Fig. 3(a), the inclined surface 32c extends in an arc shape centered on the nozzle axis O3. The other end of the inclined surface 32c in the nozzle circumferential direction is connected to a front end surface 32f facing forward of the nozzle cover 32. As shown in Fig. 3(b), the inclined surface 32c extends rearward from the connection portion with the front end surface 32f of the nozzle cover 32 toward one side in the nozzle circumferential direction.

[0063] 2 and 3(a) and (b), in the standby position of the nozzle cover 32, the inclined surface 32c faces a tongue piece 63 (described later) of the cover member 6 from the nozzle circumferential direction, and protrudes forward as it moves away from the tongue piece 63 in the nozzle circumferential direction. In this embodiment, the inclined surface 32c faces the tongue piece 63 from the other side in the nozzle circumferential direction, and protrudes forward as it moves away from the tongue piece 63 toward the other side in the nozzle circumferential direction.

[0064] The notch 32d opens to the front end surface 32f of the nozzle cover 32 and is recessed rearward from the front end surface 32f. When the nozzle cover 32 is in the standby position shown in Fig. 3(a), the notch 32d is located at the left-right end of the nozzle cover 32. When the nozzle cover 32 is in the ejection position shown in Fig. 5(a), the notch 32d is located at the upper end of the nozzle cover 32.

[0065] The tongue piece cover portion 32e is a wall portion extending in the nozzle circumferential direction, and in this embodiment, is configured by a part of the peripheral wall of the nozzle cover 32. When the nozzle cover 32 is in the standby position as shown in Figures 3(a) and (b), the tongue piece cover portion 32e covers at least a part of a tongue piece 63 (described later) of the lid member 6 from the outside in the nozzle radial direction.

[0066] (Stopper component) As shown in Fig. 1 and Fig. 2, the nozzle member 3 is combined with a stopper member 5 that restricts rearward swing of the trigger portion 81. Specifically, the stopper member 5 is connected to the nozzle cover 32 and is capable of restricting rearward movement of the trigger portion 81. The stopper member 5 rotates in the nozzle circumferential direction as the nozzle cover 32 rotates in the nozzle circumferential direction. Note that the stopper member 5 is omitted from illustration in Figs. 3 to 5.

[0067] The stopper member 5 has a connecting arm 51 extending outward in the nozzle radial direction from the peripheral wall of the nozzle cover 32, and a stopper piece 52 connected to the connecting arm 51.

[0068] The connecting arm 51 is formed so as to wrap around in the left-right direction from the front of the trigger portion 81 and extend rearward beyond the trigger portion 81. Specifically, the connecting arm 51 has a first arm portion 51a extending in the left-right direction downward from the peripheral wall of the nozzle cover 32, and a second arm portion 51b connected to the lower end of the first arm portion 51a and extending rearward from this connection portion.

[0069] The stopper piece 52 is formed to protrude inward in the left-right direction from the rear end of the second arm portion 51b. In the illustrated example, the stopper piece 52 is formed in a plate shape whose dimensions in the front-rear direction and the left-right direction are longer than the dimension in the up-down direction.

[0070] The stopper piece 52 is inserted between the trigger portion 81 and the main cylinder 82, or disengaged from between the trigger portion 81 and the main cylinder 82 in the nozzle circumferential direction as the stopper member 5 rotates in conjunction with the rotation of the nozzle cover 32 around the nozzle axis O3.

[0071] Specifically, when the nozzle cover 32 is in the standby position as shown in Figures 1 and 2, the stopper piece 52 is disposed between the trigger portion 81 and the main cylinder 82 in the front-rear direction. The stopper piece 52 abuts against or comes close to the trigger portion 81 from the rear, and abuts against or comes close to the main cylinder 82 from the front. In this way, the stopper piece 52 is sandwiched between the trigger portion 81 and the main cylinder 82, thereby restricting the rearward movement of the trigger portion 81. Furthermore, when the nozzle cover 32 is in the ejection position, the stopper piece 52 is separated from the trigger portion 81 in the nozzle circumferential direction, allowing the trigger portion 81 to move rearward.

[0072] In this way, when the nozzle cover 32 is in the standby position, the stopper member 5 is positioned behind the trigger portion 81 to restrict the rearward movement of the trigger portion 81, and when the nozzle cover 32 is in the ejection position, the stopper member 5 is moved from behind the trigger portion 81 to allow the rearward movement of the trigger portion 81.

[0073] (Cover material) The lid member 6 releasably closes the ejection hole 4 of the nozzle member 3. That is, the lid member 6 can open and close the ejection hole 4. The lid member 6 has a plate-shaped lid main body 61 that closes the ejection hole 4 from the front, a pair of rotation shafts 62 that rotate the lid main body 61, and a tongue piece 63 that protrudes outward in the nozzle radial direction from the lid main body 61 and is positioned inward in the nozzle radial direction relative to the outer circumferential surface of the nozzle cover 32.

[0074] The lid body 61 has a lid cylinder portion 61a and a plug portion 61b that protrude rearward from the plate body of the lid body 61. The lid cylinder portion 61a is cylindrical and centered on the nozzle axis O3. The lid cylinder portion 61a is detachably fitted onto the front end portion of the front relay cylinder portion 35. The plug portion 61b is columnar and centered on the nozzle axis O3. The plug portion 61b releasably closes the ejection hole 4 from the front.

[0075] The rotating shafts 62 are disposed at the upper end of the lid body 61. The pair of rotating shafts 62 protrude to the left and right sides from the lid body 61. The pair of rotating shafts 62 are axially supported by the left and right wall portions of the front wall 39 so as to be freely rotatable.

[0076] The tongue piece 63 has a plate shape. In this embodiment, the tongue piece 63 protrudes downward from the lid body 61. The entire tongue piece 63 is disposed inside the outer circumferential surface of the nozzle cover 32 in the nozzle radial direction.

[0077] 3(a), when the nozzle cover 32 is placed in the standby position, the tongue piece 63 and the inclined surface 32c are placed at different positions in the circumferential direction of the nozzle. In this state, the lid body 61 closes the ejection hole 4. Note that "closing the ejection hole 4" in this embodiment is not limited to a structure in which the plug portion 61b fits into the ejection hole 4 to directly seal it, but also includes, for example, a closing structure using only the lid cylinder portion 61a, or a structure in which the plate body of the lid body 61 only covers the ejection hole 4 from the front (i.e., when the lid cylinder portion 61a and the plug portion 61b are not provided).

[0078] 4 and 5 in order, when the nozzle cover 32 is rotated in one direction in the nozzle circumferential direction from the standby position to the ejection position, the tongue piece 63 rises forward due to contact with the inclined surface 32c, and the lid body 61 rotates about the rotation shaft 62 to open the ejection hole 4. In this embodiment, when the nozzle cover 32 is in the standby position, as shown in Figures 5(a) and 5(b), the tongue piece 63 is positioned on the front end surface 32f of the nozzle cover 32 beyond the inclined surface 32c.

[0079] (Function of trigger-type liquid ejector) Next, a case where the trigger type liquid ejector 1 configured as described above is used will be described. It is assumed that each part of the trigger type liquid ejector 1 is filled with liquid and that the liquid can be sucked up into the vertical supply tube part 10.

[0080] First, from the initial state (standby state) shown in Fig. 2, the user operates the stopper member 5 or the nozzle cover 32 to move the stopper piece 52 to one side in the nozzle circumferential direction, and pulls out the stopper piece 52 from the rear of the trigger portion 81. At this time, the nozzle cover 32 rotates together with the stopper member 5 to one side in the nozzle circumferential direction, so that the tongue piece 63 is pushed forward by the inclined surface 32c, as shown in Figs. 3 to 5, and the tongue piece 63 can be pinched. Next, the user operates the tongue piece 63 to rotate the cover member 6 about the rotation shaft 62 to open it, thereby opening the nozzle hole 4.

[0081] At this time, as shown in Fig. 5(a), the notch portion 32d is located above the lid member 6, and the lid body 61 of the lid member 6 in the open state is inserted into the notch portion 32d. Therefore, the rotation of the lid member 6 from the closed state to the open state is not hindered by the peripheral wall of the nozzle cover 32. Furthermore, when the lid body 61 (lid member 6) is inserted into the notch portion 32d, the rotation of the nozzle cover 32 in the nozzle circumferential direction is restricted. Therefore, when the nozzle hole 4 is in the open state, the nozzle cover 32 is prevented from being unintentionally returned from the ejection position to the standby position.

[0082] Next, the user operates the trigger portion 81 to pull backward against the biasing force of the biasing body 84, thereby pressurizing the inside of the main cylinder 82, and the liquid in the main cylinder 82 can be supplied to the storage space 40a of the storage cylinder 40 through the inside of the vertical supply tube portion 10. This allows the liquid to be stored (filled) in the storage space 40a while moving the storage plunger 50 backward against the biasing force of the biasing member 60. Then, by moving the storage plunger 50 backward, the liquid in the storage space 40a with increased pressure can be sprayed forward from the spray hole 4.

[0083] Therefore, 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 the liquid in the storage space 40a. Thereafter, by releasing the trigger portion 81, the trigger portion 81 is moved forward by the elastic restoring force (biasing force) of the biasing body 84, while the main piston 83 is moved back to its original state. This allows the liquid in the container body A to be sucked up into the vertical supply tube portion 10 and introduced into the main cylinder 82. This makes it possible to prepare for the next ejection.

[0084] When the operation of the trigger portion 81 toward the rear is stopped, the supply of liquid to the storage space 40a stops, but the storage plunger 50 starts to move forward toward the most forward position due to the biasing force of the biasing member 60. This allows the liquid in a pressurized state stored in the storage space 40a to continue to be sprayed forward through the spray hole 4. Therefore, even if the trigger portion 81 is not operated, the liquid can be sprayed continuously, and the liquid can be sprayed continuously.

[0085] In the trigger-type liquid ejector 1 of this embodiment described above, when the nozzle cover 32 is rotated from the standby position to the ejection position in the nozzle circumferential direction, the inclined surface 32c facing the tongue piece 63 in the nozzle circumferential direction comes into contact with the tongue piece 63 as the nozzle cover 32 rotates, and further pushes the tongue piece 63 forward. The tongue piece 63 rises and the lid member 6 rises, allowing the user to easily open the lid member 6.

[0086] The tongue piece 63 of the lid member 6 is disposed inside in the nozzle radial direction from the outer circumferential surface of the nozzle cover 32. That is, the tongue piece 63 does not protrude outward in the nozzle radial direction from the outer circumferential surface of the nozzle cover 32. Therefore, when the nozzle cover 32 is in the standby position and the lid main body 61 (lid member 6) is closing the ejection hole 4, it is possible to prevent the tongue piece 63 from being hit by an object, and to prevent the lid member 6 from opening unintentionally.

[0087] In this embodiment, when the nozzle cover 32 is in the standby position and the nozzle hole 4 is closed by the lid member 6, the stopper member 5 restricts the rearward movement of the trigger portion 81. In other words, unless the rearward movement of the trigger portion 81 is restricted by the stopper member 5, the nozzle hole 4 cannot be closed by the lid member 6.

[0088] The above configuration prevents liquid from accumulating in the liquid path of the trigger mechanism 80 or increasing internal pressure when the trigger part 81 is moved backward with the nozzle hole 4 closed. This prevents problems such as liquid dripping from the nozzle hole 4 or being unintentionally sprayed when the nozzle cover 32 is in the spray position and the lid member 6 opens the nozzle hole 4.

[0089] Furthermore, the nozzle cover 32 and the stopper member 5 rotate together, improving visibility. Therefore, the user can easily distinguish whether the nozzle cover 32 is in the standby position (the nozzle holes 4 are closed) or the nozzle position (the nozzle holes 4 are open).

[0090] In this embodiment, by operating the trigger portion 81, it is possible to eject the liquid from the ejection hole 4 to the outside while storing the liquid in the storage cylinder 40. Furthermore, even if the trigger portion 81 is not operated, it is possible to eject the liquid by using the storage plunger 50. Therefore, the liquid can be ejected continuously.

[0091] In this manner, in a trigger-type liquid jet device 1 capable of continuous jetting of liquid, if the trigger portion 81 is moved backward with the jet hole 4 in a closed state, liquid may accumulate in the storage space 40a in the storage cylinder 40, and the liquid may jet out as soon as the jet hole 4 is opened. In this regard, according to the present embodiment, the stopper member 5 restricts the backward movement of the trigger portion 81, thereby preventing the above-mentioned problem.

[0092] In this embodiment, when the nozzle cover 32 is in the standby position, the tongue piece cover portion 32e covers at least a part of the tongue piece 63 from the outer side in the nozzle radial direction. In this case, when the nozzle cover 32 is in the standby position and the lid member 6 closes the nozzle hole 4, the tongue cover portion 32e reliably prevents objects from hitting the tongue 63.

[0093] The present invention is not limited to the above-described embodiment, and the configuration may be modified within the scope of the present invention, for example as described below.

[0094] In the above embodiment, the trigger type liquid ejector 1 capable of continuous ejection by including the storage cylinder 40 and the storage plunger 50 has been described as an example, but is not limited to the continuous ejection type. That is, the storage cylinder 40 and the storage plunger 50 are not essential and may not be included. In addition, when the storage plunger 50 functioning as a pressure accumulator valve is not included, for example, a pressure accumulator valve may be provided in the injection tube portion 70, or a pressure accumulator valve may be provided in the nozzle member 3, or any other known pressure accumulator valve may be appropriately adopted. In addition, the pressure accumulator valve structure may not be provided.

[0095] In the above embodiment, the nozzle member 3 is directly attached to the injection tube portion 70, but the present invention is not limited to this. The nozzle member 3 may be indirectly attached to the injection tube portion 70 via a relay member (not shown) that is attached to the injection tube portion 70.

[0096] In the above embodiment, the nozzle cover 32 rotates around the nozzle axis O3 relative to the nozzle body 31, but the present invention is not limited to this. In the present invention, for example, a configuration in which the nozzle body 31 rotates with the rotation of the nozzle cover 32 to switch between an open state and a closed state of the ejection hole 4 may be adopted. In this case, since it is necessary to prevent the lid member 6 from rotating with the nozzle cover 32 when the nozzle cover 32 is rotated, for example, the lid member 6 may be pivotally supported by an extension portion (not shown) extending forward from the front end portion of the cover body 95 via a rotation shaft 62. In other words, the lid member 6 is not limited to a configuration in which it is provided on the nozzle member 3, but may be provided on the ejector body 2.

[0097] In addition, within the scope of the spirit of the present invention, it is possible to replace the components in the above-described embodiments with well-known components as appropriate, and the above-described embodiments and variations may be combined as appropriate. [Explanation of symbols]

[0098] Reference Signs List 1... trigger type liquid ejector, 2... ejector body, 3... nozzle member, 4... ejection hole, 5... stopper member, 6... lid member, 31... nozzle body, 10... vertical supply tube portion, 32... nozzle cover, 32c... inclined surface, 32e... tongue cover portion, 40... storage cylinder, 41... supply hole, 50... storage plunger, 61... lid body, 62... rotating shaft, 63... tongue, 80... trigger mechanism, 81... trigger portion, A... container body, O2... central axis of storage cylinder, O3... nozzle 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 extending in the front-rear direction along a nozzle axis; a cover member provided on the nozzle member or the ejector body and capable of opening and closing an ejection hole opening toward the front of the nozzle member; The ejector body includes: A vertical supply tube portion that sucks up the liquid in the container body; a trigger mechanism having a trigger portion arranged to be movable rearward in a forward biased state, the trigger portion moving rearward to cause liquid to flow from inside the vertical supply tube portion toward the nozzle hole, The nozzle member is a nozzle body in which the nozzle holes are arranged; a nozzle cover that is disposed outside the nozzle body in a nozzle radial direction perpendicular to the nozzle axis and is rotatable in a nozzle circumferential direction around the nozzle axis, The cover member is A lid body that closes the nozzle hole from the front; A rotation shaft for rotating the lid body; a tongue piece that protrudes outward in the nozzle radial direction from the lid body and is disposed inward in the nozzle radial direction relative to an outer circumferential surface of the nozzle cover, the nozzle cover has an inclined surface that faces the tongue piece in the nozzle circumferential direction and protrudes forward as it moves away from the tongue piece in the nozzle circumferential direction, The nozzle cover is a standby position in which the tongue and the inclined surface are disposed at different positions in the circumferential direction of the nozzle and the lid main body closes the ejection hole; a nozzle circumferential direction between the nozzle body and a nozzle outlet position where the tongue piece rises forward due to contact with the inclined surface, and the nozzle body rotates around the rotation axis to open the nozzle outlet position. Trigger-type liquid squirter.

2. a stopper member connected to the nozzle cover and capable of restricting rearward movement of the trigger portion; The stopper member is When the nozzle cover is in the standby position, the nozzle cover is disposed behind the trigger portion to restrict backward movement of the trigger portion, When the nozzle cover is in the ejection position, the nozzle cover is moved from the rear of the trigger portion to allow the trigger portion to move rearward.

2. The trigger type liquid ejector according to claim 1.

3. The ejector body includes: a storage cylinder having a supply hole communicating with the vertical supply tube portion, and in response to rearward movement of the trigger portion, liquid passing through the vertical supply tube portion is supplied to an inside of the storage cylinder through the supply hole; a storage plunger that is disposed in the storage cylinder so as to be movable in an axial direction along a central axis of the storage cylinder, and that moves toward one side of the axial direction and is biased toward the other side as liquid is supplied into the storage cylinder; 3. The trigger type liquid ejector according to claim 2.

4. the nozzle cover has a tongue cover portion that covers at least a part of the tongue from an outer side in a radial direction of the nozzle when the nozzle cover is at the standby position. The trigger type liquid ejector according to any one of claims 1 to 3.

Images