Trigger-type liquid dispenser

Abstract

To provide a trigger-type liquid ejector capable of suppressing rotation of a nozzle portion.SOLUTION: A trigger type liquid ejector 1 comprises: an ejector body 2 attached to a container body A containing liquid; and a nozzle portion 3 attached to the ejector body 2 and formed with an ejection hole 4 for ejecting the liquid forward. The ejector body 2 includes: a vertical supply tube portion 10 that sucks up the liquid contained in the container body A; a trigger mechanism 20 that includes a trigger portion 21 arranged so as to be movable rearward in a forward biased state, and causes the liquid to flow from inside the vertical supply tube portion 10 toward the ejection hole 4 side by rearward movement of the trigger portion 21; and an enclosing portion 40 that covers the nozzle portion 3. The ejector body 2 includes a restricting rib 45 extending in a front-rear direction. The nozzle portion 3 includes a notch 65 into which a restricting rib 45 is inserted.SELECTED DRAWING: Figure 1

Description

Technical Field

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

Background Art

[0002] There has been known a trigger-type liquid ejector that sucks up liquid from inside a container body by operation of a trigger portion and ejects the liquid through an ejection hole. As this type of trigger-type liquid ejector, for example, as disclosed in Patent Document 1 below, a trigger-type liquid ejector is known that comprises: an ejector main body to be attached to a container body that stores liquid; and a nozzle portion formed with an ejection hole that ejects liquid forward.

[0003] The ejector main body comprises a vertical supply cylinder portion that sucks up liquid inside the container body, an ejection cylinder portion extending forward from the vertical supply cylinder portion, and a trigger mechanism having a trigger portion disposed movably rearward in a forward-biased state. The trigger mechanism causes liquid to be introduced from the inside of the vertical supply cylinder portion into the ejection cylinder portion by rearward movement of the trigger portion, and causes the liquid to be ejected from the inside of the ejection cylinder portion toward the ejection hole. The nozzle portion is attached to the front end portion of the ejection cylinder portion.

Prior Art Literature

Patent Literature

[0004]

Patent Document 1

Summary of the Invention

Problem to be Solved by the Invention

[0005] However, in the trigger-type liquid dispenser described in Patent Document 1, the nozzle is attached to the dispenser body by inserting the mounting cylinder of the dispenser body into the nozzle. As a result, the strength to lock the nozzle to the dispenser body is insufficient, and for example, if force is applied to the nozzle, the nozzle may rotate relative to the dispenser body. In particular, in recent years, there has been a demand to reduce the amount of resin used in order to reduce environmental impact, and as a result of thinning the walls of each component, the strength to lock components together tends to decrease.

[0006] The present invention has been made in view of these circumstances, and its purpose is to provide a trigger-type liquid dispenser that can suppress the rotation of the nozzle. [Means for solving the problem]

[0007] A trigger-type liquid dispenser according to a first aspect of the present invention comprises a dispenser body attached to a container body containing liquid, and a nozzle portion attached to the dispenser body and having a discharge hole formed therein for ejecting liquid forward, wherein the dispenser body has a vertical supply cylinder portion for drawing up the liquid contained in the container body, a trigger portion disposed to be movable backward in a forward biased state, a trigger mechanism that causes the liquid to flow from the vertical supply cylinder portion to the discharge hole side when the trigger portion moves backward, and a surrounding portion that covers the nozzle portion, the dispenser body has a regulating rib extending in the front-rear direction, and the nozzle portion has a locking portion into which the regulating rib is inserted.

[0008] According to the first embodiment, the regulating rib and the locking portion engage with each other, thereby restricting the displacement of the nozzle portion so as to rotate around an axis extending in the front-rear direction relative to the sprayer body. Furthermore, since the nozzle portion is covered by the surrounding portion, when the nozzle portion attempts to rotate relative to the sprayer body, the surrounding portion can prevent the nozzle portion from deforming so as to enlarge the engaging portion by contacting the nozzle portion. As a result, rotation of the nozzle portion can be suppressed.

[0009] A trigger-type liquid dispenser according to a second aspect of the present invention is a trigger-type liquid dispenser according to the first aspect, wherein the trigger mechanism includes a piston that moves in the forward and backward direction in conjunction with the trigger portion, and a cylinder into which the piston is inserted and whose interior communicates with the vertical supply cylinder portion; the dispenser body includes a cylinder mounting cylinder that protrudes forward from the vertical supply cylinder portion and into which the cylinder is fitted; and an injection cylinder portion positioned above the cylinder mounting cylinder and guiding the liquid in the vertical supply cylinder portion to the ejection hole; the nozzle portion is fitted onto the injection cylinder portion, and the regulating rib may be provided between the cylinder mounting cylinder and the injection cylinder portion.

[0010] According to the second embodiment, since the regulating rib is provided between the injection cylinder and the cylinder mounting cylinder, the regulating rib can be prevented from protruding outward from the ejector body, thus preventing the ejector body from becoming larger. Therefore, the above-mentioned effects can be achieved while preventing the trigger-type liquid ejector from becoming larger.

[0011] A trigger-type liquid dispenser according to a third aspect of the present invention is a trigger-type liquid dispenser according to the first or second aspect of the present invention, wherein the dispenser body comprises: an injection cylinder portion that protrudes forward from the vertical supply cylinder portion and guides the liquid in the vertical supply cylinder portion to the ejection hole; a pressure accumulator member movably disposed within the injection cylinder portion and which, due to a pressure increase within the injection cylinder portion, moves backward from a blocked position that blocks communication between the vertical supply cylinder portion and the ejection hole through the injection cylinder portion to a permitted position that allows such communication; an elastic arm that biases the trigger portion forward; and an elastic body that contacts the pressure accumulator member from behind and, due to a pressure increase within the injection cylinder portion, elastically deforms to allow the pressure accumulator member to move backward, and which, due to a pressure decrease within the injection cylinder portion, biases the pressure accumulator member forward by elastic restoration deformation, wherein the elastic body and the elastic arm may be integrally formed.

[0012] According to the third embodiment, since the elastic body and the elastic arm are integrally formed, there is no need to separately provide a biasing member or the like to bias the trigger portion forward. Therefore, the number of parts can be reduced, and costs can also be lowered.

[0013] A trigger-type liquid dispenser according to a fourth aspect of the present invention is a trigger-type liquid dispenser according to any of the first to third aspects described above, wherein the trigger portion comprises an engaging portion having a rotating shaft portion that protrudes in the left-right direction, a support portion that supports the rotating shaft portion of the trigger portion, and a wall portion that covers the engaging portion and the support portion from the outside in the left-right direction.

[0014] According to the fourth embodiment, when a force is applied to the trigger portion in the left-right direction, the wall portion comes into contact with the engaging portion or the support portion, thereby restricting the relative displacement of the support portion and the engaging portion in the left-right direction, and preventing the rotational shaft portion of the trigger portion from coming out of the support portion. Therefore, the detachment of the trigger portion can be restricted. [Effects of the Invention]

[0015] According to the present invention, it is possible to provide a trigger-type liquid dispenser that can suppress the rotation of the nozzle. [Brief explanation of the drawing]

[0016] [Figure 1] This is a longitudinal cross-sectional view of a trigger-type liquid dispenser according to an embodiment. [Figure 2] This is a longitudinal cross-sectional view of the body according to the embodiment. [Figure 3] This is a front view of the body according to the embodiment. [Figure 4] This is a bottom view of the first relay cylinder according to the embodiment. [Figure 5] This is a side view of the first relay cylinder according to the embodiment. [Figure 6] This is a front view of the trigger unit according to the embodiment. [Figure 7] This is a side view of the trigger unit according to the embodiment. MODE FOR CARRYING OUT THE INVENTION

[0017] Hereinafter, a dispenser according to an embodiment of the present invention will be described with reference to the drawings.

[0018] As shown in FIG. 1, the dispenser according to the embodiment is a trigger-type liquid ejector 1. The trigger-type liquid ejector 1 comprises an ejector body 2 mounted to a container body A that accommodates contents, a nozzle portion 3 mounted to the ejector body 2, formed with an ejection hole 4 for ejecting the contents, and a cover member 5 that covers the ejector body 2 and the nozzle portion 3. Examples of the contents accommodated in the container body A include liquids such as detergents for households and tableware, deodorants and fragrances for use in spaces, clothes and the like, and sterilizing alcohol. Unless otherwise specified, each component of the trigger-type liquid ejector 1 is a molded article made of synthetic resin.

[0019] The ejector body 2 mainly comprises a vertical feed cylinder portion 10, a cylinder mounting cylinder 16, a trigger mechanism 20, an injection cylinder portion 30, a surrounding portion 40, and a switching valve 50. In the following description, the container body A side along the central axis O1 of the vertical feed cylinder portion 10 is referred to as the lower side, the opposite side is referred to as the upper side, and the direction along the central axis O1 is referred to as the vertical direction. Further, in a plan view viewed from the vertical direction, one direction intersecting the central axis O1 is referred to as the front-rear direction, and a direction orthogonal to both the vertical direction and the front-rear direction is referred to as the left-right direction.

[0020] The vertical feed cylinder portion 10 extends vertically and sucks up the content in the container body A. The vertical feed cylinder portion 10 includes a capped cylindrical outer cylinder 11 and an inner cylinder 12 fitted into the outer cylinder 11. The outer cylinder 11 is integrally formed with the cylinder mounting cylinder 16, the ejection cylinder portion 30 and the surrounding portion 40, and is provided as a single member. Hereinafter, the single member formed by the outer cylinder 11, the cylinder mounting cylinder 16, the ejection cylinder portion 30 and the surrounding portion 40 is referred to as a body 6. The inner cylinder 12 includes a flange 13 disposed via a packing on the upper end opening edge of the mouth portion of the container body A. The flange 13 is pressed from above by a mounting cap 14 (screw-fitted) attached to the mouth portion of the container body A. An upper portion of a pipe 15 that extends vertically and sucks up the content from the container body A is fitted to the inner cylinder 12.

[0021] As shown in FIG. 2 and FIG. 3, the cylinder mounting cylinder 16 is provided in front of the vertical feed cylinder portion 10. The cylinder mounting cylinder 16 projects forward from the vertical feed cylinder portion 10 and is open forward.

[0022] As shown in FIG. 1, the trigger mechanism 20 includes a trigger portion 21, a piston 22, a cylinder 23, and a biasing member 24. The trigger mechanism 20 is configured to allow the content to flow from the inside of the vertical feed cylinder portion 10 toward the ejection hole 4 side by the rearward movement of the trigger portion 21.

[0023] The cylinder 23 is fitted into the cylinder mounting cylinder 16. The cylinder 23 is formed in a bottomed cylindrical shape that opens forward. The cylinder 23 communicates with the inside of the vertical feed cylinder portion 10 at a part of its rear wall.

[0024] The trigger portion 21 is disposed in front of the vertical feed cylinder portion 10 in a forward biased state so as to be movable rearward. The trigger portion 21 is pivotally supported by the nozzle portion 3 on the left and right sides of the ejection cylinder portion 30 so as to be swingable in the front-rear direction. The trigger portion 21 extends downward from the pivotal support position by the nozzle portion 3, and is positioned in front of the piston 22 and the cylinder 23. The trigger portion 21 will be described in detail later.

[0025] The piston 22 is positioned inside the cylinder 23 so as to be movable in the front-rear direction. The piston 22 is designed to move in the front-rear direction in conjunction with the movement of the trigger unit 21. The inside of the cylinder 23 is pressurized and depressurized as the piston 22 moves in the front-rear direction. The piston 22 is formed in a top-closed cylindrical shape, opening at the rear and closed at the front.

[0026] The piston 22 is biased forward by the biasing force of the biasing member 24 together with the trigger portion 21. As the trigger portion 21 moves backward, the piston 22 retracts and is pushed into the cylinder 23. The piston 22 is in its foremost position when the trigger portion 21 is in its foremost swinging position.

[0027] The biasing member 24 is a pair of elastic arms 38 integrally formed with a closing member 36 that closes the rear end of the injection cylinder 30. The pair of elastic arms 38 are provided on both the left and right sides of the injection cylinder 30 and extend forward from the closing member 36. The elastic arms 38 elastically deform so as they curve downward as they move forward, biasing the trigger portion 21 forward. By forming the biasing member 24 on the closing member 36 in this way, it becomes possible to form the pair of elastic arms 38 to be long extending forward from the rear end of the injection cylinder 30, and to provide a large and gentle curve to their portion. The biasing member 24 may also be a spring member or the like positioned between the top wall of the piston 22 and the bottom wall of the cylinder 23.

[0028] The injection cylinder section 30 is positioned above the cylinder mounting cylinder 16. The injection cylinder section 30 guides the contents of the vertical supply cylinder section 10 to the ejection hole 4. The injection cylinder section 30 is connected to the upper end of the vertical supply cylinder section 10 and extends forward around the axis O2. The injection cylinder section 30 is formed in a cylindrical shape with the front and rear ends open.

[0029] As shown in Figure 2, the injection cylinder section 30 comprises a rear cylinder section 31, a front cylinder section 32, and a middle cylinder section 33. The rear cylinder section 31 is formed in a top-opening cylindrical shape and has a circumferential wall 311 extending in the front-rear direction around the axis O2, and a top wall 312 that protrudes toward the axis O2 from the front end edge of the circumferential wall 311 and extends around the entire circumference. A through hole is formed in the top wall 312 of the rear cylinder section 31, centered on the axis O2. A communication hole 313 is formed in the lower part of the rear cylinder section 31, penetrating the circumferential wall 311 of the rear cylinder section 31 in the vertical direction and connecting the inside of the rear cylinder section 31 to the inside of the vertical supply cylinder section 10. The front cylinder section 32 protrudes forward from the inner circumferential edge of the through hole in the top wall 312 of the rear cylinder section 31. An injection opening 34 is formed at the front end of the front cylinder section 32, which opens forward and supplies the contents forward. The middle cylinder portion 33 extends rearward from the rear end of the front cylinder portion 32. The middle cylinder portion 33 is positioned inside the rear cylinder portion 31. As a result, an annular pressure accumulation space S is formed between the middle cylinder portion 33 and the rear cylinder portion 31, centered on axis O2. The pressure accumulation space S is in communication with the interior of the vertical supply cylinder portion 10 through a communication hole 313.

[0030] As shown in Figure 1, a pressure accumulator valve 35 (pressure accumulator member) is arranged inside the injection cylinder 30. The pressure accumulator valve 35 is arranged to be movable in the front-rear direction inside the injection cylinder 30. The pressure accumulator valve 35 is designed to move backward from its forward blocking position, which blocks communication between the vertical supply cylinder 10 and the injection opening 34 through the injection cylinder 30, due to a pressure increase in the pressure accumulator space S, to its rearmost allowing position, which allows the aforementioned communication.

[0031] The rear end of the injection cylinder portion 30 is closed by a closing member 36 assembled from behind the pressure accumulator valve 35. The closing member 36 comprises a pair of elastic arms 38 that constitute the biasing member 24 described above, and a plurality of elastic protrusions 37 (elastic bodies) that contact the pressure accumulator valve 35 from behind to position the pressure accumulator valve 35.

[0032] Multiple elastic protrusions 37 are inserted into the rear cylinder portion 31 of the injection cylinder portion 30. The multiple elastic protrusions 37 contact the tapered surface of the rear end opening edge of the pressure accumulator valve 35 from the rear. When the pressure in the pressure accumulator space S exceeds a predetermined value, the tapered surface of the pressure accumulator valve 35 moves backward, causing the multiple elastic protrusions 37 to elastically deform so that their tips come into close proximity, allowing the pressure accumulator valve 35 to move backward and connect the pressure accumulator space S to the injection opening 34 of the injection cylinder portion 30. Furthermore, as the pressure in the pressure accumulator space S decreases, the multiple elastic protrusions 37 bias the pressure accumulator valve 35 forward through elastic restorative deformation, blocking communication between the pressure accumulator space S and the injection opening 34. A biasing body such as a coil spring may be separately provided between the closing member 36 and the pressure accumulator valve 35. Moreover, the biasing body may be provided instead of the elastic protrusions 37.

[0033] As shown in Figures 2 and 3, the surrounding portion 40 is positioned to surround the front cylinder portion 32 of the injection cylinder portion 30 from above and on both the left and right sides. The surrounding portion 40 extends in the front-rear direction at a distance from the front cylinder portion 32. The rear end of the surrounding portion 40 is connected to the rear cylinder portion 31 of the injection cylinder portion 30. The surrounding portion 40 comprises an upper wall portion 41 positioned above the front cylinder portion 32 and a pair of side wall portions 42 positioned on both the left and right sides of the front cylinder portion 32.

[0034] The upper wall portion 41 is formed in a plate shape with its front and back surfaces facing vertically. The upper wall portion 41 extends in the front-rear direction with a constant width and is formed in a rectangular shape in plan view. The upper wall portion 41 is positioned with a gap in the vertical direction relative to the tip cylinder portion 32. The front end of the upper wall portion 41 is located behind the front end of the tip cylinder portion 32 and is at approximately the same position in the front-rear direction as the front end of the cylinder mounting cylinder 16. An engagement recess 43 is formed on the lower surface of the upper wall portion 41. In this embodiment, the engagement recess 43 penetrates the upper wall portion 41 in the vertical direction. The engagement recess 43 is located in the left-right direction, closest to the tip cylinder portion 32.

[0035] The side wall portion 42 is formed in a plate shape with its front and back surfaces facing left and right. The side wall portion 42 extends downward from the entire left and right side edge of the upper wall portion 41. The lower end edge of the side wall portion 42 is connected to the outer circumferential surface of the cylinder mounting cylinder 16. The side wall portion 42 is located between the front cylinder portion 32 and the elastic arm 38 of the biasing member 24 (see Figure 1), and is positioned at a distance from the front cylinder portion 32 in the left and right direction. In this way, the surrounding portion 40 is formed to leave a gap from the front cylinder portion 32 throughout its entire cross-sectional view perpendicular to the front and rear direction. The gap between the surrounding portion 40 and the front cylinder portion 32 is open to the front.

[0036] A regulating rib 45 extending in the front-rear direction is provided between the injection cylinder portion 30 and the cylinder mounting cylinder 16. The regulating rib 45 is positioned between a pair of side wall portions 42 of the surrounding portion 40. The regulating rib 45 is formed in a plate shape with its front and back surfaces facing left and right. The upper edge of the regulating rib 45 is connected to the lower part of the nozzle portion 32. The lower edge of the regulating rib 45 is connected to the upper part of the cylinder mounting cylinder 16. The front end of the regulating rib 45 is located behind the front end of the cylinder mounting cylinder 16.

[0037] As shown in Figure 1, the switching valve 50 is located inside the vertical supply cylinder 10. The switching valve 50 is located in a flow path between the upper end position of the pipe 15 fitted inside the inner cylinder 12 and the connection position above the upper end position of the pipe 15 where the outer cylinder 11 and the cylinder 23 are connected. A communication hole 17 is formed in the flow path, connecting the vertical supply cylinder 10 and the discharge hole 4.

[0038] The switching valve 50 switches between communication and shutoff between the vertical supply cylinder 10 and the ejection hole 4 in response to the pressurization and depressurization inside the cylinder 23. The switching valve 50 comprises a valve seat 51, a ball valve 52, a top wall portion 53, and a group of elastic protrusions 54. The valve seat 51 is provided on the peripheral edge of the opening of the communication hole 17 that connects the vertical supply cylinder 10 and the ejection hole 4. The valve seat 51 protrudes radially from the inner wall surface of the upper end of the inner cylinder 12. The upper surface of the valve seat 51 gradually decreases in diameter as it goes downwards.

[0039] The ball valve 52 is a sphere that is seated on the valve seat 51 so as to be able to move away from it. The ball valve 52 is made of, for example, resin. However, the ball valve 52 may be made of metal. The top wall portion 53 faces the ball valve 52 in the direction of the opening of the communication hole 17. That is, the top wall portion 53 faces the valve seat 51 with a gap between them, with the ball valve 52 in between, in the direction of the opening of the communication hole 17. The top wall portion 53 is formed integrally with the outer cylinder 11. Specifically, the top wall portion 53 forms the top wall of the top-shaped outer cylinder 11. A side wall extending upward is integrally formed from the top wall portion 53, and the injection cylinder portion 30 and the outer cylinder 11 are integrally formed via the side wall. A flow path connecting the pressure accumulation space S inside the injection cylinder portion 30 and the cylinder 23 is formed between the lower part of the injection cylinder portion 30 and the side wall.

[0040] The elastic projection group 54 has multiple projections 55 that protrude from the top wall portion 53 toward the ball valve 52. The multiple projections 55 contact the upper half of the ball valve 52 on the top wall portion 53 side when the ball valve 52 is seated on the valve seat 51. The multiple projections 55 may be spaced apart vertically relative to the ball valve 52 when it is seated on the valve seat 51. The elastic projection group 54 extends spirally from the top wall portion 53 toward the ball valve 52 around the central axis O1. When the ball valve 52 separates from the valve seat 51, the elastic projection group 54 elastically deforms so that the space between the three projections 55 is pushed apart by the ball valve 52. This elastic deformation of the elastic projection group 54 creates a vertical gap between the valve seat 51 and the ball valve 52, allowing the vertical supply cylinder portion 10 and the ejection hole 4 to communicate.

[0041] The nozzle section 3 is fitted onto the injection cylinder section 30 from the front. The nozzle section 3 comprises a cylindrical intermediate member 60 attached to the front end of the injection cylinder section 30, and a top-cylindrical nozzle body 70 that is rotatably mounted on the intermediate member 60 with a forward-locking mechanism. An ejection hole 4 is formed in the front top wall of the nozzle body 70, which opens forward and ejects the contents forward.

[0042] The relay member 60 connects the injection cylinder portion 30 and the nozzle body 70. The relay member 60 is mounted to the injection cylinder portion 30 from the front. The relay member 60 is located in front of the injection opening 34 of the injection cylinder portion 30 and comprises an opposing wall portion 61 positioned opposite to the injection opening 34, a first relay cylinder portion 62 extending rearward from the opposing wall portion 61 and fitted onto the front cylinder portion 32 of the injection cylinder portion 30, a second relay cylinder portion 63 extending forward from the opposing wall portion 61, and a guide shaft 64 located inside the second relay cylinder portion 63 and extending forward from the opposing wall portion 61.

[0043] The first intermediate cylinder portion 62 is formed in a cylindrical shape that opens to the rear. The first intermediate cylinder portion 62 is inserted into the gap between the surrounding portion 40 and the cylinder mounting cylinder 16 and the tip cylinder portion 32 such that its rear end is located behind the front end of the cylinder mounting cylinder 16. The upper wall portion 41 and a pair of side wall portions 42 of the surrounding portion 40 are in contact with the outer circumferential surface of the first intermediate cylinder portion 62.

[0044] As shown in Figures 1 and 4, a notch 65 (locking portion) is formed at the rear end opening edge of the first intermediate cylinder portion 62. The notch 65 is formed at the lower part of the first intermediate cylinder portion 62. The notch 65 extends forward and has width in the left-right direction. The notch 65 has a width greater than or equal to the thickness of the regulating rib 45. The regulating rib 45 is inserted into the notch 65 from the rear. This restricts the rotation of the intermediate member 60 around the front cylinder portion 32. At least the portion of the first intermediate cylinder portion 62 located within the area where the notch 65 is formed in the front-rear direction is in contact with the pair of side wall portions 42 of the surrounding portion 40.

[0045] As shown in Figure 1, an engaging projection 66 is formed on the upper part of the first intermediate cylinder portion 62. The engaging projection 66 protrudes upward and engages with the engaging recess 43 of the surrounding portion 40. This restricts the intermediate member 60 from moving forward relative to the surrounding portion 40.

[0046] The second intermediate cylinder portion 63 and the guide shaft 64 are positioned around an axis O3 that is eccentrically downward with respect to the axis O2 of the injection cylinder portion 30. Of the opposing wall portion 61, the portion located above the guide shaft 64 and inside the second intermediate cylinder portion 63 has an injection communication hole 67 that communicates with the injection opening 34 of the injection cylinder portion 30. As a result, the inside of the second intermediate cylinder portion 63 communicates with the inside of the injection cylinder portion 30 through the injection communication hole 67 and the injection opening 34. A first switching groove 641 extending in the front-rear direction is formed on the outer circumferential surface of the guide shaft 64. Multiple first switching grooves 641 are formed at intervals around the axis O3.

[0047] As shown in Figures 4 and 5, a pair of lever support walls 68 (support parts) extending rearward are formed on both sides of the opposing wall portion 61, flanking the first intermediate cylinder portion 62. The lever support walls 68 are positioned with a gap between them and the second intermediate cylinder portion 63. The lever support walls 68 have shaft holes 69 for rotatably supporting the trigger portion 21. The shaft holes 69 open on the side of the lever support wall 68 facing the first intermediate cylinder portion 62. In this embodiment, the shaft holes 69 penetrate the lever support wall 68 in the left-right direction.

[0048] As shown in Figure 1, the nozzle body 70 is attached to the second relay cylinder 63. Thus, the nozzle body 70 is attached to the ejector body 2 via the relay member 60. The nozzle body 70 is positioned in front of the opposing wall portion 61 of the relay member 60 and comprises a nozzle wall portion 71 in which the ejection hole 4 is formed, an outer fitting cylinder portion 72 extending rearward from the nozzle wall portion 71 and fitted onto the second relay cylinder portion 63 from the front, and an inner cylinder portion 73 protruding rearward from the portion of the nozzle wall portion 71 located inside the outer fitting cylinder portion 72 and rotatably fitted onto the guide shaft 64. A second switching groove 731 extending in the front-rear direction is formed on the inner circumferential surface of the inner cylinder portion 73. Furthermore, a spin chamber 75 that can communicate with the first switching groove 641 is formed in a concave shape on the rear surface of the nozzle wall portion 71, in the portion located inside the inner cylinder portion 73.

[0049] The outer fitting cylinder portion 72 is mounted on the second relay cylinder portion 63 so as to be rotatable around the axis O3, with a forward locking mechanism preventing it from coming loose. As a result, the nozzle body 70 is assembled with the relay member 60 so as to be rotatable around the axis O3. The second switching groove 731 of the inner cylinder portion 73 communicates with the first switching groove 641 of the relay member 60 at a predetermined rotation position of the nozzle body 70 around the axis O3, and is not in communication with the first switching groove 641 at any other rotation position. The communication between the first switching groove 641 and the second switching groove 731 allows the ejection hole 4 and the inside of the second relay cylinder portion 63 to communicate through the spin chamber 75, the first switching groove 641, and the second switching groove 731. Therefore, the nozzle body 70 is capable of switching between a discharge-allowed state, in which the contents are allowed to be discharged from the discharge hole 4, and a discharge-restricted state, in which the discharge is restricted, as it rotates around the axis O3.

[0050] The cover member 5 is formed to cover the entire vertical supply cylinder portion 10 except for the lower end, the surrounding portion 40, and the entire injection cylinder portion 30 from at least both sides in the left-right direction and from above. Furthermore, the cover member 5 is formed in front of the surrounding portion 40 to cover the entire nozzle body 70 except for the nozzle body 70 itself from both sides in the left-right direction and from above.

[0051] Here, we will describe the trigger unit 21 in detail. As shown in Figures 1, 6, and 7, the trigger unit 21 comprises a trigger body 80, an engaging portion 81, a receiving portion 82, and a restricting wall 83 (wall portion).

[0052] As shown in Figure 1, the trigger body 80 extends in front of the piston 22, sloping forward from top to bottom. The trigger body 80 is the part that is gripped when performing the ejection operation, and can be hooked onto from the front, for example, with an index finger. The front end of the piston 22 is connected to the middle part of the trigger body 80 in the vertical direction. As a result, the piston 22 moves back and forth in conjunction with the back and forth movement of the trigger part 21.

[0053] As shown in Figure 6, a pair of engaging portions 81 are provided on the upper end of the trigger body 80, spaced apart in the left-right direction. The engaging portions 81 are formed in a plate shape with their front and back surfaces facing left-right. The pair of engaging portions 81 are arranged to sandwich the first relay cylinder portion 62 of the relay member 60 from the outside in the left-right direction. Each engaging portion 81 is inserted between the first relay cylinder portion 62 and the lever support wall 68. Each engaging portion 81 is provided with a cylindrical rotating shaft portion 84 that protrudes outward in the left-right direction. The rotating shaft portion 84 is inserted into the shaft hole 69 of the lever support wall 68. As a result, the pair of engaging portions 81 are each combined with the pair of lever support walls 68 so as to be rotatable around an axis along the left-right direction. That is, the trigger portion 21 is rotatable using the pair of rotating shaft portions 84 as a pivot point.

[0054] A pair of receiving parts 82 are provided on both the left and right sides of the trigger body 80. The receiving parts 82 protrude from the trigger body 80 on both sides in the left-right direction. The receiving parts 82 have recesses 85 that open to the rear (see Figure 1). The elastic arm 38 of the closing member 36 is fitted into the recess 85. As a result, the trigger part 21 is biased forward by the elastic restoring force of the elastic arm 38.

[0055] As shown in Figures 6 and 7, the restricting wall 83 is provided to extend each receiving portion 82. The restricting wall 83 is positioned to sandwich the pair of engaging portions 81 from the outside in the left-right direction. The restricting wall 83 extends from the upper end of the receiving portion 82, approximately parallel to the engaging portions 81, with a gap in the left-right direction between them. The restricting wall 83 covers the engaging portions 81 and the lever support wall 68 from the outside in the left-right direction (see also Figure 5). When viewed from the outside in the left-right direction, the restricting wall 83 overlaps a part of the peripheral edge of the shaft hole 69 of the lever support wall 68 and a part of the rotating shaft portion 84. The restricting wall 83 is positioned with a gap in the left-right direction between it and the rotating shaft portion 84. The gap in the left-right direction between the restricting wall 83 and the rotating shaft portion 84 is smaller than the thickness of the lever support wall 68.

[0056] As described above, according to the trigger-type liquid dispenser 1 of this embodiment, the dispenser body 2 has a restricting rib 45 extending in the front-rear direction, and a notch 65 is provided in the first relay cylinder portion 62 of the relay member 60 of the nozzle portion 3 into which the restricting rib 45 is inserted. With this configuration, the restricting rib 45 and the notch 65 engage with each other, thereby restricting the displacement of the relay member 60 so as to rotate around the axis O2 extending in the front-rear direction relative to the dispenser body 2. Moreover, since the relay member 60 is covered by the surrounding portion 40, when the relay member 60 attempts to rotate relative to the dispenser body 2, the surrounding portion 40 can prevent the relay member 60 from deforming so as to enlarge the notch 65 by contacting the relay member 60. In particular, in this embodiment, the notch 65 has width in the left-right direction, and a pair of side wall portions 42 of the surrounding portion 40 contact the first relay cylinder portion 62 from the outside in the left-right direction. Therefore, the deformation of the first intermediate cylinder portion 62 so that the notch 65 expands can be effectively suppressed by the pair of side wall portions 42 contacting the first intermediate cylinder portion 62. As a result, the rotation of the intermediate member 60 of the nozzle portion 3 can be suppressed. Furthermore, when the nozzle body 70 attached to the sprayer body 2 is rotated via the intermediate member 60, the intermediate member 60 is prevented from rotating together, making it possible to accurately switch between the spray-allowed state and the spray-restricted state by rotating the nozzle body 70.

[0057] By the way, if the intermediate member 60 of the nozzle part 3 that supports the trigger part 21 is rotatable, when a force is applied to the trigger part 21 in the left-right direction, the trigger part 21 may move significantly in the left-right direction due to the rotation of the intermediate member 60. As a result of the trigger part 21 moving in the left-right direction, problems may occur such as one of the engaging parts 81 formed on the trigger part 21 coming off the lever support wall 68, or a force being applied to the piston 22 causing the sealed state between the sliding part (seal part) of the piston 22 and the cylinder 23 to break down, resulting in leakage of contents (liquid leakage). According to this embodiment, since the rotation of the intermediate member 60 can be suppressed, it is possible to suppress the large displacement of the trigger part 21 in the left-right direction when a force is applied to the trigger part 21, and thus avoid the above-mentioned problems.

[0058] Furthermore, the regulating rib 45 is provided between the cylinder mounting cylinder 16 and the injection cylinder portion 30, which is positioned above the cylinder mounting cylinder 16 and into which the relay member 60 of the nozzle portion 3 is fitted. With this configuration, since the regulating rib 45 is provided between the injection cylinder portion 30 and the cylinder mounting cylinder 16, it is possible to suppress the regulating rib from protruding outward from the ejector body 2 and thus prevent the ejector body 2 from becoming larger. Therefore, the above-mentioned effects can be achieved while suppressing the enlargement of the trigger-type liquid ejector 1.

[0059] Furthermore, the elastic arm 38 that biases the trigger portion 21 forward and the elastic projection 37 that biases the pressure accumulator valve 35 forward are integrally formed. Therefore, there is no need to separately provide a biasing member or the like to bias the trigger portion forward. Consequently, the number of parts can be reduced, and costs can also be lowered.

[0060] The trigger portion 21 includes an engaging portion 81 having a rotating shaft portion 84 that protrudes in the left-right direction. The trigger-type liquid dispenser 1 includes a lever support wall 68 that supports the rotating shaft portion 84 of the trigger portion 21, and a restricting wall 83 that covers the engaging portion 81 and the lever support wall 68 from the outside in the left-right direction. With this configuration, when a force is applied to the trigger portion 21 in the left-right direction, the restricting wall 83 contacts the engaging portion 81 or the lever support wall 68, thereby restricting the relative displacement of the engaging portion 81 and the lever support wall 68 in the left-right direction and preventing the rotating shaft portion 84 of the trigger portion 21 from coming out of the lever support wall 68. Therefore, the detachment of the trigger portion 21 can be prevented. This prevents malfunctions such as the trigger portion 21 not rotating properly or leakage of the contents due to force being applied to the piston 22 as a result of the trigger portion 21 coming out.

[0061] Furthermore, the restricting wall 83 is provided integrally with the trigger unit 21. With this configuration, the restricting wall 83 can be positioned in a predetermined location when attaching the trigger unit 21 to the relay member 60. This prevents a decrease in the ease of assembly of the trigger-type liquid dispenser 1. In addition, since no new part with a restricting wall is required, the complexity of the manufacturing process and the increase in parts costs can be suppressed.

[0062] In this embodiment, the engaging portion 81 is positioned inside the lever support wall 68, and the restricting wall 83 is positioned outside the lever support wall 68. Therefore, for example, if a leftward force is applied to the trigger portion 21, the rotating shaft portion 84 of the right-side engaging portion 81 may be displaced so as to disengage from the shaft hole 69 of the right-side lever support wall 68. However, the right-side restricting wall 83 abuts against the lever support wall 68, thereby restricting the rightward displacement of the right-side engaging portion 81 relative to the right-side lever support wall 68. The same applies when a rightward force is applied to the trigger portion 21. Thus, the disengagement of the trigger portion 21 can be restricted.

[0063] It should be noted that the present invention is not limited to the embodiments described above with reference to the drawings, and various modifications are conceivable within its technical scope. For example, in the above embodiment, the restricting rib 45 is provided between the cylinder mounting cylinder 16 and the injection cylinder portion 30 and is connected to both the cylinder mounting cylinder 16 and the injection cylinder portion 30, but the configuration is not limited to this. For example, the restricting rib may protrude from the injection cylinder portion in a direction other than downward. Also, the restricting rib may be connected to only one of the cylinder mounting cylinder and the injection cylinder portion. Furthermore, the restricting rib may be connected to the surrounding portion.

[0064] Furthermore, in the above embodiment, the nozzle portion 3 comprises a nozzle body 70 having ejection holes 4 and a relay member 60 connecting the injection cylinder portion 30 and the nozzle body 70, but the configuration is not limited to this. The nozzle portion may be a single member having ejection holes.

[0065] Furthermore, in the above embodiment, the trigger portion 21 is supported by the relay member 60, but the trigger portion may be supported by the ejector body or the cover member. Also, the regulating wall may be provided integrally with a member other than the trigger portion, such as the cover member or the nozzle portion. In addition, a new member having a regulating wall may be provided.

[0066] Furthermore, it is possible to replace the components in the above-described embodiments with well-known components as appropriate, without departing from the spirit of the present invention. [Explanation of symbols]

[0067] 1…Trigger-type liquid dispenser 2…Dispeller body 3…Nozzle section 4…Dispatch hole 10…Vertical supply cylinder section 16…Cylinder mounting cylinder 20…Trigger mechanism 21…Trigger section 22…Piston 23…Cylinder 30…Injection cylinder section 35…Pressure accumulator valve (pressure accumulator) 37…Elastic projection (elastic body) 38…Elastic arm 40…Encircling section 45…Regulating rib 65…Notch (locking section) 68…Lever support wall (support section) 81…Engaging section 83…Regulating wall (wall section) 84…Rotating shaft section A…Container body

Claims

1. A sprayer body that is attached to a container body containing liquid, A nozzle section is attached to the aforementioned ejector body and has an ejection hole formed therein for ejecting liquid forward, The aforementioned spray body is, A vertical supply cylinder that draws up the liquid contained in the container body, 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 liquid to flow from the vertical supply cylinder to the ejection hole side, The surrounding portion that covers the nozzle portion, It has, The ejector body has regulating ribs extending in the front-rear direction, The nozzle portion has a locking portion into which the regulating rib is inserted. The trigger mechanism is A piston that moves in the forward and backward direction in conjunction with the trigger mechanism, A cylinder into which the piston is inserted and whose interior communicates with the vertical supply cylinder, It has, The aforementioned spray body is, A cylinder mounting cylinder that protrudes forward from the vertical supply cylinder portion and into which the cylinder is fitted, An injection cylinder section is positioned above the cylinder mounting cylinder and guides the liquid in the vertical supply cylinder section to the ejection hole, It has, The nozzle portion has a cylindrical portion fitted onto the injection cylinder portion, The locking portion is a notch formed in the rear end opening edge of the cylindrical portion. Trigger-type liquid dispenser.

2. A sprayer body attached to a container body containing a liquid, A nozzle section is attached to the aforementioned ejector body and has an ejection hole formed therein for ejecting liquid forward, The aforementioned spray body is, A vertical supply cylinder that draws up the liquid contained in the container body, 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 liquid to flow from the vertical supply cylinder to the ejection hole side, The surrounding portion that covers the nozzle portion, It has, The ejector body has regulating ribs extending in the front-rear direction, The nozzle portion has a locking portion into which the regulating rib is inserted. The trigger mechanism is A piston that moves in the forward and backward direction in conjunction with the trigger mechanism, A cylinder into which the piston is inserted and whose interior communicates with the vertical supply cylinder, It has, The aforementioned spray body is, A cylinder mounting cylinder that protrudes forward from the vertical supply cylinder portion and into which the cylinder is fitted, An injection cylinder section is positioned above the cylinder mounting cylinder and guides the liquid in the vertical supply cylinder section to the ejection hole, It has, The nozzle portion is fitted onto the injection cylinder portion, The aforementioned restricting rib is provided between the cylinder mounting cylinder and the injection cylinder portion. Trigger-type liquid dispenser.

3. A sprayer body attached to a container body containing a liquid, A nozzle section is attached to the aforementioned ejector body and has an ejection hole formed therein for ejecting liquid forward, The aforementioned spray body is, A vertical supply cylinder that draws up the liquid contained in the container body, 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 liquid to flow from the vertical supply cylinder to the ejection hole side, The surrounding portion that covers the nozzle portion, It has, The ejector body has regulating ribs extending in the front-rear direction, The nozzle portion has a locking portion into which the regulating rib is inserted. The aforementioned spray body is, An injection cylinder portion that protrudes forward from the vertical supply cylinder portion and guides the liquid inside the vertical supply cylinder portion to the ejection hole, A pressure accumulator is movably disposed within the injection cylinder and, due to a pressure increase within the injection cylinder, moves backward from a blocked position that blocks communication between the vertical supply cylinder and the ejection hole through the injection cylinder, thereby switching to an allowable position that permits such communication. An elastic arm that biases the trigger portion forward, An elastic body that contacts the pressure accumulating member from the rear and, by elastically deforming due to the pressure increase in the injection cylinder, allows the pressure accumulating member to move backward, and biases the pressure accumulating member forward by elastic restorative deformation as the pressure in the injection cylinder decreases, It has, The member including the elastic body is fixed to the injection cylinder portion. The elastic body and the elastic arm are formed integrally, The elastic arm extends forward from the member including the elastic body. Trigger-type liquid dispenser.

4. The trigger portion includes an engaging portion having a rotating shaft portion that protrudes in the left-right direction, A support portion that supports the rotating shaft portion of the trigger portion, A wall portion that covers the engagement portion and the support portion from the outside in the left-right direction, A trigger-type liquid dispenser according to any one of claims 1 to 3, comprising:

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