Dispenser

Abstract

To prevent a trigger lever and a discharge head from being disengaged from each other even when a lateral load is applied to the trigger lever.SOLUTION: The discharger 1 includes the discharge head 20 provided at the upper end portion of the stem 10, and the trigger lever 6 for depressing the discharge head 20, wherein the discharge head 20 includes the shaft portion 90 protruding in the left-right direction, and the convex portion 91 protruding from the tip end portion of the shaft portion 90 toward the radial direction of the shaft portion 90, and the trigger lever 6 includes the cover portion 63 covering the shaft portion 90 from the outside in the left-right direction, and the depressing portion 100 having the concave 100a engaging with the shaft portion 90 from above, disposed inside the convex portion 91 in the left-right direction, and capable of abutting on the convex portion 91 in the left-right direction.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a dispenser. [Background technology]

[0002] A dispenser described in Patent Document 1 below has been known. This dispenser includes a stem that is biased upward and is arranged to be freely movable downward, a dispenser head that is attached to the upper end of the stem and has a dispense hole for dispensing the contents, and a trigger lever for pressing down the dispenser head. A cylindrical shaft protrudes from both the left and right sides of the dispenser head. The trigger lever is provided with a pair of depressions that sandwich the dispenser head from the left and right, and the lower ends of the depressions are formed with arc-shaped notches into which the shafts slidably fit. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2017-13824 Summary of the Invention [Problem to be solved by the invention]

[0004] In the above-mentioned dispenser, the trigger lever is usually operated with one hand, and depending on the amount of force applied, the trigger lever may be displaced left or right when pulled backward (so-called diagonal pull). In such a case, a load is applied to the trigger lever in the left or right direction, and the depressed portion of the trigger lever may come off the shaft of the dispenser head.

[0005] The present invention has been made in consideration of the above circumstances, and its purpose is to provide a dispenser in which the trigger lever and the dispenser head do not disengage even when a load is applied to the trigger lever in the left-right direction. [Means for solving the problem]

[0006] (1) The dispenser according to the present invention comprises a stem arranged in an upwardly biased state and movable downward at the mouth of a container body in which the contents are accommodated; a dispenser head provided at the upper end of the stem and having a dispenser hole formed therein; and a trigger lever rotatably arranged behind the dispenser head and configured to press down the dispenser head by rotating downward, thereby discharging the contents through the stem and from the dispenser hole. The dispenser head comprises a shaft portion protruding in the left-right direction and a convex portion protruding radially from the tip of the shaft. The trigger lever comprises a cover portion covering the shaft portion from the outside in the left-right direction, and a depression portion formed with a recess that engages with the shaft portion from above, positioned laterally inward of the convex portion, and capable of abutting against the convex portion in the left-right direction.

[0007] According to the dispenser of the present invention, a protrusion protruding radially from the shaft is provided at the tip of the shaft, which protrudes left and right from the discharge head. The trigger lever includes a cover that covers the shaft from the outside left and right, and a depression portion that has a recess that engages with the shaft from above and is positioned inside the protrusion in the left and right direction and can abut against the protrusion in the left and right direction, so that the cover and depression portion sandwich the protrusion in the left and right direction. As a result, even if a load is applied to the trigger lever in the left and right direction, either the cover or the depression portion abuts against the protrusion, preventing the depression portion of the trigger lever from disengaging from the shaft of the discharge head.

[0008] (2) The shaft portion and the cover portion may be in contact with or close to each other in the left-right direction.

[0009] In this case, it is possible to suppress rattling of the trigger lever in the left-right direction.

[0010] (3) The convex portion may include a forward protruding portion that protrudes forward of the shaft portion, an upward protruding portion that protrudes above the shaft portion, and a rearward protruding portion that protrudes rearward of the shaft portion, and the pushing portion may abut or be close to the forward protruding portion, the upward protruding portion, and the rearward protruding portion in the left-right direction.

[0011] In this case, the push-down portion faces the protrusion over a wide area of ​​the upper half of the shaft portion, so that wobbling of the trigger lever in the left-right direction can be more reliably suppressed. [Effects of the Invention]

[0012] According to the discharge device of the present invention, even if a load is applied to the trigger lever in the left-right direction, the engagement between the trigger lever and the discharge head can be prevented from being released. [Brief explanation of the drawings]

[0013] [Figure 1] 1 is a longitudinal sectional view of a dispenser according to an embodiment of the present invention. [Figure 2] FIG. 2 is a side view of the ejection head according to the embodiment of the present invention. [Figure 3] 4 is a half cross-sectional view of an engagement portion between a discharge head and a trigger lever according to an embodiment of the present invention. FIG. [Figure 4] FIG. 3 is an enlarged view of a depression part according to the embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0014] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A dispenser according to an embodiment of the present invention will now be described with reference to the drawings.

[0015] 1 includes a pump section 3 that dispenses content from a cylindrical container body 2 with a bottom, an attachment cap 4 that attaches the pump section 3 to the opening 2a of the container body 2, a trigger lever 6 that connects to the pump section 3, and a support member 5 that supports the trigger lever 6. The pump section 3 includes a stem 10, a discharge head 20, a cylinder 30, a lower piston 40A, and an upper piston 40B.

[0016] The mounting cap 4, stem 10, cylinder 30, lower piston 40A, and upper piston 40B are arranged with their respective central axes positioned on a common axis. Hereinafter, this common axis will be referred to as the container axis O1, and the direction along the container axis O1 will be referred to as the vertical direction. Furthermore, in a plan view seen from the vertical direction, the direction intersecting the container axis O1 will be referred to as the radial direction, and the direction circumferential around the container axis O1 will be referred to as the circumferential direction.

[0017] The discharge head 20 extends along a central axis O2 that intersects with the container axis O1. Hereinafter, the direction in which the discharge head 20 extends in a plan view will be referred to as the front-rear direction, the side of the discharge holes 3a of the discharge head 20 along the front-rear direction will be referred to as the front, and the side of the discharge head 20 opposite the discharge holes 3a will be referred to as the rear. The direction perpendicular to both the up-down direction and the front-rear direction will be referred to as the left-right direction.

[0018] The attachment cap 4 is formed in a cylindrical shape with a top and an opening in the center. The inner peripheral surface of the attachment cap 4 is formed with a female thread that screws into a male thread formed on the outer peripheral surface of the mouth portion 2a of the container body 2.

[0019] The support member 5 is attached to the upper end of the cylinder 30 inserted into the opening of the attachment cap 4. The support member 5 includes a topped cylindrical surrounding cylinder portion 51 fitted onto the upper end of the cylinder 30, a guide cylinder 52 extending upward from the top wall of the surrounding cylinder portion 51, a pair of side wall portions 56 projecting rearward from the surrounding cylinder portion 51 and arranged with a gap in between in the left-right direction, and a rear wall portion 57 connecting the rear end edges of the side wall portions 56 to each other in the left-right direction.

[0020] The top wall of surrounding tube portion 51 is formed in a circular ring shape with an opening in the center, and guide tube 52 is connected to the inner peripheral edge of this top wall. Stem 10 is inserted into guide tube 52 so as to be movable in the vertical direction. On the underside of the top wall of surrounding tube portion 51, there are formed inner hanging tube portion 54, into which stem 10 is inserted, and outer hanging tube portion 55, which is disposed between inner hanging tube portion 54 and the peripheral wall of surrounding tube portion 51.

[0021] An opposing portion 51a is formed on the peripheral surface of the lower end portion of the peripheral wall of surrounding tube portion 51, and faces the top wall portion of attachment cap 4 in the vertical direction via a gap. Outer hanging tube portion 55 is fitted inside the upper end portion of cylinder 30. Inner hanging tube portion 54 is connected to guide tube 52.

[0022] The pair of side walls 56 extend gradually upward from the front to the rear. A shaft 58 protrudes outward in the left-right direction from the upper ends of the pair of side walls 56. The shaft 58 is disposed rearward of the stem 10. The shaft 58 serves as the pivot axis of the trigger lever 6. A reinforcing wall 59 protrudes upward from the inner surface of the rear wall 57 and connects the inner surfaces of the pair of side walls 56 together in the left-right direction.

[0023] The trigger lever 6 is attached to the support member 5 via a shaft 58. This allows the trigger lever 6 to swing around a shaft extending in the left-right direction relative to the support member 5. The trigger lever 6 has a top plate portion 61 that covers the discharge head 20 from above, a front plate portion 62 that extends gradually downward as it moves forward from the front edge of the top plate portion 61, and a pair of cover portions 63 that extend downward from the left and right side edges of the top plate portion 61 and face each other in the left-right direction.

[0024] The discharge head 20 is disposed in the internal space surrounded by the top plate 61 and the pair of cover portions 63. The pair of cover portions 63 are disposed so as to sandwich the discharge head 20 from the left and right. The top plate 61 has a smoothly curved shape that bulges upward, and its rear end abuts from above against the upper end of the rear wall portion 57 of the support member 5. This restricts the trigger lever 6 from swinging further upward around the shaft body 58.

[0025] An opening 64 is formed in the front portion of the top plate 61, penetrating the top plate 61. The opening 64 is formed in the center portion of the top plate 61 in the left-right direction and opens forward. This gives the front portion of the top plate 61 a bifurcated shape in the left-right direction. The front plate 62 extends gradually downward as it moves forward from the front end edge of the bifurcated top plate 61.

[0026] The discharge head 20 is inserted into the opening 64. The discharge head 20 protrudes forward from the front plate 62 through the opening 64. The pair of cover parts 63 of the trigger lever 6 laterally sandwich the upper parts of the pair of side wall parts 56 of the support member 5. The lower part of the front plate 62 is used as a finger hook part for hooking the fingertips.

[0027] The pair of cover parts 63 engage with the shaft part 90 of the discharge head 20 (described later). In the above configuration, when the trigger lever 6 is swung downward around the shaft body 58, the trigger lever 6 pushes the shaft part 90 of the discharge head 20 downward, and the stem 10 moves downward.

[0028] The stem 10 is formed in a cylindrical shape extending in the vertical direction, and is provided inside the guide tube 52 so as to be movable downward while being biased upward. A cylindrical guide member 11 is fitted onto the stem 10 from below. The guide member 11 extends downward beyond the lower end of the stem 10. The guide member 11 is one of the components of the stem 10. Note that if the ejection head 20 is a separate part from the stem 10 and is attached to the upper end of the stem 10, the stem 10 and the guide member 11 may be formed integrally.

[0029] A communication hole 12 is formed on the outer peripheral surface of a guide member 11 that extends downward from the stem 10. The communication hole 12 communicates the inside of the stem 10 with the inside of the cylinder 30 through the inside of the guide member 11. A ring-shaped mounting groove 13 is formed on the peripheral surface of the lower end of the guide member 11, into which the lower piston 40A is attached.

[0030] The guide member 11 has a rod portion 14 that extends downward beyond the lower piston 40A. When the stem 10 is at its lowest position, the lower end of the rod portion 14 is located directly above the valve body 33 (described later). This prevents the valve body 33 from moving upwardly away from the restricting protrusion 31e.

[0031] A discharge head 20 is provided at the upper end of the stem 10. The discharge head 20 includes a nozzle cylinder portion 21 extending in the front-rear direction from the upper end of the stem 10, a nozzle cover 22 attached to the front end of the nozzle cylinder portion 21, a nozzle tip 23 fitted into the front end opening of the nozzle cover 22 and having a discharge hole 3a formed therein, a pressure accumulator valve 24 provided inside the nozzle cylinder portion 21, a biasing member 25 that biases the pressure accumulator valve 24 forward, and a lid portion 26 that closes the rear end opening of the nozzle cylinder portion 21.

[0032] According to this configuration, when the internal pressure at the rear of the nozzle tube portion 21 exceeds a predetermined value, the pressure accumulator valve 24 moves rearward (toward the side opposite the discharge hole 3a) against the biasing force of the biasing member 25, thereby connecting the inside of the stem 10 with the discharge hole 3a and discharging the contents from the discharge hole 3a. When the trigger lever 6 is finished being pulled, the biasing force of the biasing member 25 moves the pressure accumulator valve 24 forward, so that the discharge of the contents continues, eliminating the interruption of the discharge of the contents when the trigger lever 6 is finished being pulled and when it is released.

[0033] The stopper 70 is detachably attached to the stem 10. The stopper 70 is formed in a roughly C-shape in a plan view, and when the dispenser 1 is not in use, it is interposed between the guide tube 52 and the nozzle tube portion 21 in the vertical direction, thereby restricting the downward depression of the dispenser head 20. When the dispenser 1 is in use, the stopper 70 is detached from the stem 10.

[0034] The lower piston 40A is attached to the attachment groove 13 of the guide member 11 of the stem 10. The lower piston 40A includes a base 41A, a sliding portion 42A, a cylindrical seal portion 43A, and a spring receiving portion 44A. The base 41A is formed in a disk shape in a plan view and extends radially outward from the guide member 11.

[0035] The sliding portion 42A extends upward in a cylindrical shape from the outer periphery of the base portion 41A. The sliding portion 42A is formed in an inverted cone shape that increases in diameter and gradually decreases in thickness as it extends upward. The upper end of the sliding portion 42A is easily elastically deformed in the radial direction and abuts against the inner wall surface of the lower cylinder 30A (described below) so as to be slidable in the vertical direction. The sliding portion 42A forms the valve portion 80.

[0036] The cylindrical seal portion 43A extends upward in a cylindrical shape from the center of the upper surface of the base portion 41A. The inner peripheral surface of the cylindrical seal portion 43A is in close contact with the outer peripheral surface of the guide member 11. The spring receiving portion 44A is provided perpendicularly from the lower surface of the base portion 41A. A step is formed on the outer peripheral surface of the spring receiving portion 44A to receive the upper end of the coil spring 34.

[0037] The upper piston 40B is provided above the lower piston 40A on the stem 10. The upper piston 40B includes a connecting cylindrical portion 41B and a cylindrical sliding portion 42B. The connecting cylindrical portion 41B is formed in an annular shape extending radially outward from the outer circumferential surface of the guide member 11.

[0038] The cylindrical sliding portion 42B is connected to the radially outer end of the connecting cylindrical portion 41B and extends vertically from that portion. The upper end of the cylindrical sliding portion 42B faces the lower end of the inner hanging cylindrical portion 54 in the vertical direction, with the seal member 50 sandwiched therebetween. The lower end of the cylindrical sliding portion 42B abuts against the inner wall surface of the upper cylinder 30B (described below) so as to be slidable vertically. The connecting cylindrical portion 41B is located above the communicating hole 12 on the outer peripheral surface of the guide member 11.

[0039] The cylinder 30 includes an outer cylindrical member 31 and an inner cylindrical member 32 assembled inside the outer cylindrical member 31. The outer cylindrical member 31 is formed in a multi-stage cylindrical shape. The outer cylindrical member 31 includes an upper cylindrical portion 31a extending in the vertical direction, a lower cylindrical portion 31b extending downward from the lower end of the upper cylindrical portion 31a and having smaller inner and outer diameters than the upper cylindrical portion 31a, and a connecting cylindrical portion 31c extending downward from the lower end of the lower cylindrical portion 31b and having smaller inner and outer diameters than the lower cylindrical portion 31b.

[0040] An inner cylindrical member 32 is fitted inside the upper cylindrical portion 31a. The lower end of the inner cylindrical member 32 abuts against the upper surface of the step between the upper cylindrical portion 31a and the lower cylindrical portion 31b. A first air hole 31g that connects the inside and outside of the upper cylindrical portion 31a is formed in the upper part of the upper cylindrical portion 31a. An annular support plate portion 31f that protrudes radially outward is formed in the upper end of the upper cylindrical portion 31a. The lower surface of the top wall portion of the attachment cap 4 abuts against the outer periphery of the upper surface of the support plate portion 31f.

[0041] A packing material 35 is disposed between the support plate portion 31f and the upper opening edge of the mouth portion 2a of the container body 2. When the attachment cap 4 is screwed onto the mouth portion 2a, the support plate portion 31f and the packing material 35 are fixed between the top wall of the attachment cap 4 and the mouth portion 2a.

[0042] A coil spring 34 is disposed inside the lower cylindrical portion 31b. The upper end of the coil spring 34 extends from the lower cylindrical portion 31b into the upper cylindrical portion 31a and abuts against a spring bearing portion 44A of the lower piston 40A. As a result, the stem 10 receives an upward biasing force from the coil spring 34 via the lower piston 40A and the guide member 11.

[0043] A tapered valve seat 31d is formed at the lower end of the lower cylindrical portion 31b, with the inner diameter gradually decreasing as it extends downward. A valve element 33 is seated on the valve seat 31d so as to be removably positioned upward. The valve element 33 is a so-called ball valve formed in a spherical shape. Note that the valve element 33 may also be a check valve using various valve elements instead of a ball valve.

[0044] A restricting protrusion 31e is provided on the inner peripheral surface of the lower cylindrical portion 31b, extending gradually upward from the outer radial direction toward the inner radial direction. The inner diameter of the upper end of the restricting protrusion 31e is smaller than the outer diameter of the valve body 33, thereby restricting the valve body 33 from detaching upward from the restricting protrusion 31e. A gap is formed in the restricting protrusion 31e to interrupt its circumferential extension.

[0045] The connecting tube portion 31c communicates with the lower end of the lower tube portion 31b via the valve body 33. A pipe attachment 113 is attached to the connecting tube portion 31c. The pipe attachment 113 includes a pipe member 114 that extends to the vicinity of the bottom of the container body 2, and connects the lower end opening of the outer tube member 31 with the upper end opening of the pipe member 114. Note that a forward / inverted dual-purpose adapter (not shown) may be connected to the connecting tube portion 31c, which supplies the contents into the cylinder 30 when negative pressure is created inside the cylinder 30 when the dispenser 1 is in both the upright and inverted positions.

[0046] The inner cylinder member 32 includes a lower cylinder forming portion 32a, an upper cylinder forming portion 32b, a restricting portion 32c, a flange portion 32d, and an upright cylinder portion 32e. The lower cylinder forming portion 32a forms the lower end portion of the inner cylinder member 32. The lower cylinder forming portion 32a is formed in a cylindrical shape that extends in the vertical direction and is fitted inside the upper cylinder portion 31a of the outer cylinder member 31. Note that the first air hole 31g of the upper cylinder portion 31a is located above the fitting position of the lower cylinder forming portion 32a.

[0047] The lower cylinder-forming portion 32a forms the lower cylinder 30A that houses the lower piston 40A. An annular groove 32g that is recessed radially outward is formed in the lower part of the inner wall surface of the lower cylinder-forming portion 32a. When the stem 10 is positioned at the lowest position, the upper end of the sliding portion 42A of the lower piston 40A is positioned in the annular groove 32g.

[0048] The upper cylinder forming portion 32b extends upward from the upper end of the lower cylinder forming portion 32a. The upper cylinder forming portion 32b has smaller inner and outer diameters than the lower cylinder forming portion 32a. The upper cylinder forming portion 32b forms the upper cylinder 30B that houses the upper piston 40B.

[0049] A second air hole 32f is formed in the upper part of the upper cylinder-forming portion 32b, connecting the inside and outside of the upper cylinder-forming portion 32b. The second air hole 32f communicates with the first air hole 31g through a gap (annular space) between the upper cylinder-forming portion 32b and the upper cylindrical portion 31a on the outside of the upper cylinder-forming portion 32b. When the stem 10 is positioned at the uppermost position, the second air hole 32f is not blocked by the cylindrical sliding portion 42B of the upper piston 40B and is open.

[0050] The restricting portion 32c is formed in a cylindrical shape and is connected to the step between the lower cylinder forming portion 32a and the upper cylinder forming portion 32b. When the stem 10 is at the uppermost position, the lower end surface of the restricting portion 32c abuts against the upper end of the sliding portion 42A to restrict the upward movement of the lower piston 40A, which is biased upward by the coil spring 34. When the stem 10 is at the lowermost position, the upper end surface of the restricting portion 32c abuts against the lower end of the cylindrical sliding portion 42B to restrict the downward movement of the upper piston 40B.

[0051] The flange portion 32d protrudes radially outward from the upper end of the upper cylinder forming portion 32b and is disposed on the upper end opening edge of the upper tubular portion 31a. The flange portion 32d is fixed to the upper end opening edge of the upper tubular portion 31a by the surrounding tubular portion 51 of the support member 5. An upright tubular portion 32e extending upward is formed on the upper surface of the flange portion 32d. The upright tubular portion 32e forms the upper end of the cylinder 30. In other words, the surrounding tubular portion 51 is fitted on the outside of the upright tubular portion 32e, and the outer hanging tubular portion 55 is fitted inside the upright tubular portion 32e.

[0052] The inner tube member 32 is formed by an upper tube member 111 and a lower tube member 112. The upper tube member 111 forms the upper part of the inner tube member 32. The upper tube member 111 forms the above-mentioned upper cylinder forming portion 32b, flange portion 32d, and upright tube portion 32e. The lower tube member 112 forms the lower part of the inner tube member 32. The lower tube member 112 forms the above-mentioned lower cylinder forming portion 32a and restricting portion 32c. A fitting groove portion 112a into which the lower end portion of the upper tube member 111 fits is formed at the upper end of the lower tube member 112.

[0053] The discharger 1 having the above-described configuration is formed with a lower cylinder 30A that houses the lower piston 40A so that it can slide up and down, and an upper cylinder 30B that is connected to the upper end of the lower cylinder 30A, has an interior that is vertically connected to the interior of the lower cylinder 30A, has an inner diameter smaller than that of the lower cylinder 30A, and houses the upper piston 40B so that it can slide up and down.

[0054] A valve portion 80 is provided at a sliding portion 42A of the lower piston 40A with the lower cylinder 30A. When the stem 10 moves downward, the valve portion 80 elastically deforms radially inward, allowing communication between a space S1 below the lower piston 40A and a space S2 above inside the lower cylinder 30A. When the stem 10 moves upward, the valve portion 80 restores its original shape radially outward, blocking communication between the space S1 below the lower piston 40A and the space S2 above inside the lower cylinder 30A.

[0055] 2 to 4, the configuration of the engagement portion between the discharge head 20 and the trigger lever 6 will be described. In the following description, the direction intersecting the central axis O3 passing through the center of the shaft portion 90 of the discharge head 20 is referred to as the radial direction, and the direction going around the central axis O3 is referred to as the circumferential direction.

[0056] 2, the ejection head 20 is provided with a cylindrical shaft portion 90 that protrudes in the left-right direction. The shaft portion 90 protrudes from each of the left-right side walls of the ejection head 20. A protrusion 91 that protrudes in the radial direction of the shaft portion 90 is provided at the tip of the shaft portion 90. The protrusion 91 is formed in a plate shape that extends in the front-to-rear direction, and is provided in the upper half region of the shaft portion 90, from the front to the rear of the shaft portion 90, in a range from 0° to 180°.

[0057] Specifically, the protrusion 91 includes a forward protrusion 91A that protrudes forward from the shaft 90, an upward protrusion 91B that protrudes above the shaft 90, and a rearward protrusion 91C that protrudes rearward from the shaft 90. The forward protrusion 91A is formed in a rectangular plate shape in side view. The upward protrusion 91B is formed in a substantially rectangular plate shape in side view with rounded corners on the front upper side. The rearward protrusion 91C is formed in a rectangular plate shape in side view. The protrusion 91 may be formed in a rectangular or semicircular shape as a whole.

[0058] 3, the trigger lever 6 includes a cover portion 63 that covers the shaft portion 90 from the outside in the left-right direction, and a push-down portion 100 that is located inside the protrusion 91 in the left-right direction and can abut against the protrusion 91 in the left-right direction. The push-down portion 100 is a pair of plate-like members that hang down from inclined portions near the upper ends of the pair of cover portions 63 and are arranged to sandwich the nozzle tube portion 21 from both left and right sides.

[0059] As shown in Fig. 4, a recess 100a that engages with the shaft 90 from above is formed at the lower end of the push-down part 100. The recess 100a is formed in an arc shape that is slidable relative to the shaft 90. The protrusion 91 is formed larger than the recess 100a in a side view from the left and right direction. The outer shape of the push-down part 100 is formed larger than the protrusion 91 in a side view from the left and right direction. At least one of the forward protrusion 91A and the rear protrusion 91C may protrude from the outer shape of the push-down part 100 in the front-to-rear direction.

[0060] The push-down portion 100 faces the forward protruding portion 91A, the upward protruding portion 91B, and the rearward protruding portion 91C in the left-right direction. The lower end of the push-down portion 100 is bifurcated in the front-to-rear direction with the shaft portion 90 in between. The front lower end of the push-down portion 100 extends downward beyond the central axis O3 of the shaft portion 90 and the forward protruding portion 91A. In addition, the rear lower end of the push-down portion 100 extends downward beyond the central axis O3 of the shaft portion 90 and the rearward protruding portion 91C.

[0061] 3, the push-down part 100 is disposed inside the protrusion 91 in the left-right direction and is able to abut against the protrusion 91 in the left-right direction. The push-down part 100 includes a connection part 101 that is integrally connected to the cover part 63. The connection part 101 is provided outside the recess 100a in the left-right direction and above the recess 100a, forming a gap between the cover part 63 and the part of the push-down part 100 that straddles the shaft part 90 in the front-rear direction.

[0062] The protrusion 91 is inserted into the gap between the push-down portion 100 and the cover portion 63, which is formed by the connection portion 101. The protrusion 91 is inserted with a small clearance in the left-right direction that allows it to be inserted into the gap, and is close to or in contact with the push-down portion 100. In addition, the shaft portion 90 (including the surface of the protrusion 91 facing outward in the left-right direction) and the cover portion 63 are also in contact with or close to each other in the left-right direction.

[0063] To operate the dispenser 1 having the above configuration, first, the stopper 70 shown in Figure 1 is detached from the stem 10 to allow the trigger lever 6 and stem 10 to move downward. Next, the trigger lever 6 is rotated downward around the shaft 58.

[0064] At this time, the trigger lever 6 is rotated downward while the fingertip is placed on the finger rest on the front plate 62 of the trigger lever 6. When the trigger lever 6 is rotated downward, the stem 10 moves downward against the biasing force. When the stem 10 moves downward, the inside of the cylinder 30 is pressurized with the valve body 33 seated on the valve seat 31d.

[0065] Specifically, when the trigger lever 6 is operated and the stem 10 moves downward against the force, the contents filled inside the upper cylinder 30B are pressurized by the upper piston 40B, and rise inside the stem 10 through the communicating hole 12 of the guide member 11 and are supplied into the discharge head 20.

[0066] When the stem 10 moves downward, the valve portion 80 elastically deforms radially inward, allowing communication between the space S1 below the lower piston 40A and the space S2 above inside the lower cylinder 30A. As a result, the contents are discharged from inside the upper cylinder 30B, and the inside of the lower cylinder 30A, which is in vertical communication with the inside of the upper cylinder 30B, is filled with the contents from the space S1 below the lower piston 40A.

[0067] When the trigger lever 6 is released and the stem 10 is forced to move upward, the valve portion 80 deforms to restore its original shape, blocking communication between the space S1 below the lower piston 40A and the space S2 above it inside the lower cylinder 30A. As a result, the contents stored inside the lower cylinder 30A are pressurized by the lower piston 40A, which moves upward together with the stem 10.

[0068] Here, the capacity inside the upper cylinder 30B increases due to the upper piston 40B moving upward together with the stem 10, but because the inner diameter of the upper cylinder 30B is smaller than the inner diameter of the lower cylinder 30A, the decrease in the capacity of the lower cylinder 30A is greater than the increase in the capacity of the upper cylinder 30B. As a result, the difference in the capacity (internal volume) between the lower cylinder 30A and the upper cylinder 30B allows the content to be supplied to the discharge head 20 through the stem 10. In other words, the inside of the lower cylinder 30A and the inside of the upper cylinder 30B are pressurized as a whole.

[0069] In this way, even when the trigger lever 6 connected to the stem 10 returns from its fully pulled state to its original position shown in Figure 1, the contents inside the upper cylinder 30B are pressurized and the contents are supplied to the discharge head 20 through the stem 10.

[0070] When the stem 10 is forced to move upward, negative pressure is created in the space S1 below the lower piston 40A, the valve body 33 moves upward away from the valve seat 31d, and the contents in the container body 2 are sucked up into the cylinder 30. During this time, the first air hole 31g, the second air hole 32f, and the gap between the stem 10 and the guide tube 52 are connected, allowing outside air to be drawn into the container body 2 and releasing the negative pressure inside the container body 2.

[0071] As described above, the dispenser 1 according to this embodiment not only dispenses the contents when the trigger lever 6 is operated, but also supplies the contents to the discharge head 20 when the trigger lever 6 returns to its original position. This makes it possible to increase the amount of contents supplied to the discharge head 20 with a single operation of the trigger lever 6.

[0072] In this embodiment, as shown in Fig. 2, a protrusion 91 protruding radially from the shaft 90 is provided at the tip of the shaft 90, which protrudes in the left-right direction from the discharge head 20. As shown in Fig. 3, the trigger lever 6 includes a cover 63 that covers the shaft 90 from the outside in the left-right direction, and a depression portion 100 that has a recess 100a that engages with the shaft 90 from above and is positioned inward of the protrusion 91 in the left-right direction and can abut against the protrusion 91 in the left-right direction. The cover 63 and the depression portion 100 sandwich the protrusion 91 in the left-right direction. As a result, even if a load is applied to the trigger lever 6 in the left-right direction, either the cover 63 or the depression portion 100 abuts against the protrusion 91, so that the engagement between the depression portion 100 of the trigger lever 6 and the shaft 90 of the discharge head 20 can be prevented from being disengaged.

[0073] As described above, the dispenser 1 according to this embodiment comprises a stem 10 arranged in an upwardly biased state at the mouth 2a of the container body 2 in which the contents are accommodated, so as to be able to move downward; a discharge head 20 provided at the upper end of the stem 10 and having a discharge hole 3a formed therein; and a trigger lever 6 rotatably arranged behind the discharge head 20, which presses the discharge head 20 by rotating downward, causing the contents to be dispensed through the stem 10 and through the discharge hole 3a. The discharge head 20 comprises an axial portion 90 that protrudes in the left-right direction, and a convex portion 91 that protrudes from the tip of the axial portion 90 in the radial direction of the axial portion 90. The trigger lever 6 comprises a cover portion 63 that covers the axial portion 90 from the outside in the left-right direction, and a push-down portion 100 that has a concave portion 100a that engages with the axial portion 90 from above, is positioned inside the convex portion 91 in the left-right direction, and is able to abut against the convex portion 91 in the left-right direction. According to this configuration, even if a load is applied to the trigger lever 6 in the left-right direction, the engagement between the trigger lever 6 and the discharge head 20 can be prevented from being released.

[0074] In this embodiment, the shaft portion 90 and the cover portion 63 are in contact with or close to each other in the left-right direction. This configuration can prevent the trigger lever 6 from wobbling in the left-right direction.

[0075] Furthermore, in this embodiment, the protrusion 91 includes a forward protrusion 91A that protrudes forward of the shaft 90, an upward protrusion 91B that protrudes above the shaft 90, and a rearward protrusion 91C that protrudes rearward of the shaft 90, and the push-down part 100 abuts or is close to the forward protrusion 91A, the upward protrusion 91B, and the rearward protrusion 91C in the left-right direction. With this configuration, the push-down part 100 faces the protrusion 91 over a wide range in the upper half of the shaft 90, so that wobbling of the trigger lever 6 in the left-right direction can be more reliably suppressed.

[0076] The technical scope of the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the spirit of the present invention.

[0077] For example, the convex portion 91 was provided so as to be flush with the tip surface of the shaft portion 90, but it may also be provided at the tip of the shaft portion 90, slightly inward in the left-right direction from the tip surface of the shaft portion 90.

[0078] In addition, 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]

[0079] 1 Dispenser 2 Container body 2a Mouth 3 Pump section 3a Discharge hole 4 Mounting cap 5 Support member 6 Trigger Lever 10 Stem 11 Guide member 12 Communication hole 13 Mounting groove 14 Rod section 20 Discharge head 21 Nozzle cylinder 22 Nozzle cover 23 Nozzle Tip 24 Accumulator valve 25 biasing member 26 Lid 30 cylinders 30A Lower Cylinder 30B Upper Cylinder 31 Outer cylinder member 31a Upper cylinder part 31b Lower cylinder part 31c Connecting tube 31d valve seat 31e Regulating protrusion 31f Support plate part 31g First air vent 32 Inner cylinder member 32a Lower cylinder forming part 32b Upper cylinder forming part 32c Regulatory Department 32d flange 32e Standing cylinder part 32f Second air vent 32g Annular groove 33 Valve body 34 Coil spring 35 Packing material 40A Lower Piston 40B Upper piston 41A base 41B Continuous cylinder part 42A sliding part 42B Cylindrical sliding part 43A Seal cylinder 44A Spring support 50 sealing material 51 Surrounding tube 51a Opposite part 52 Guide tube 54 Inner hanging cylinder part 55 Outer hanging tube part 56 Side wall 57 Rear wall 58 Shaft 59 Reinforced Wall 61 Top plate 62 Front plate part 63 Cover 64 Opening 70 Stopper 80 Valve section 90 Shaft 91 Convex part 91A Front protrusion 91B Upper protrusion 91C Rear protrusion 100 Pressing section 100a recess 101 Connection 111 Upper cylinder member 112 Lower cylinder member 112a Fitting groove 113 Pipe attachment 114 Pipe members O1 Container axis O2 center axis O3 center axis S1 space S2 space

Claims

1. a stem disposed in an opening of a container body in which contents are accommodated, and movable downward in an upward biased state; a discharge head provided at an upper end of the stem and having a discharge hole; a trigger lever that is rotatably disposed behind the discharge head and that presses down the discharge head by rotating it downward, thereby discharging the content from the discharge hole through the stem; The ejection head includes: A shaft portion protruding in the left-right direction; a protrusion protruding from a tip end of the shaft portion in a radial direction of the shaft portion, The trigger lever a cover portion that covers the shaft portion from the outside in the left-right direction; a depression portion that is formed on the shaft portion and engages with the protrusion portion from above, the depression portion being disposed inward in the left-right direction from the protrusion portion and capable of contacting the protrusion portion in the left-right direction; Dispenser.

2. The shaft portion and the cover portion are in contact with or close to each other in the left-right direction. The dispenser of claim 1 .

3. The convex portion is a forward protruding portion protruding forward from the shaft portion; an upward protrusion that protrudes above the shaft portion; a rearward protruding portion protruding rearward from the shaft portion, the push-down portion is in contact with or close to the forward protruding portion, the upward protruding portion, and the rearward protruding portion in the left-right direction; A dispenser according to claim 1 or 2.

Images