JP2016026862A - Trigger type liquid jet device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a trigger type liquid jet device capable of discharging a liquid with a small operation force.SOLUTION: A seal step part 48 which expands a diameter of a passage P from the pump 21 side to the nozzle 19 side is provided at the downstream side relative to pump holes 25, 26 on an inner peripheral surface forming the passage P. A discharge side check valve 44 is formed into an umbrella shape which is elastically deformable and an outer peripheral end of the discharge side check valve 44 is placed in contact with the seal step part 48.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a trigger type liquid ejector that is attached to a mouth portion of a container that contains a liquid and ejects the liquid in the container in a mist or foam form from a nozzle.

  In containers that contain liquids such as mold removers, detergents, clothing pastes, residential waxes, hair styling agents, fragrances, etc., the liquid is nozzleed by a pump that is activated by the operation of a trigger as a sprayer attached to the mouth. Trigger type liquid ejectors that are sprayed in the form of mist or foam are often used.

  Such a trigger-type liquid ejector includes an ejector body that is attached to the mouth of the container by a mounting cap or the like, and the ejector body is provided with a flow path that communicates with the container. Is equipped with a nozzle. The pump is connected to a pump hole provided in the middle of the flow path, and when the pump is operated, the liquid in the container is pumped along the flow path and ejected from the nozzle to the outside.

  In the trigger type liquid ejector having such a configuration, the flow direction of the liquid pumped in the flow path in accordance with the operation of the pump, that is, the suction operation and the discharge operation of the pump, is directed from the container side to the nozzle side. It is necessary to regulate. Therefore, a valve member that functions as a check valve is provided in the flow path.

  As such a valve member, for example, as shown in Patent Document 1, it is arranged on the container side with respect to the pump hole in the flow path, allows the liquid to flow from the container side toward the pump side, and from the pump side. A cylindrical suction-side check valve that blocks the flow of liquid toward the container side, and is arranged closer to the nozzle side than the pump hole in the flow path, and allows the liquid flow from the pump side toward the nozzle side There is known a configuration in which an umbrella-shaped discharge-side check valve that prevents liquid flow from the nozzle side toward the pump side is integrally provided.

Japanese Patent No. 3647583

  However, the valve member described in Patent Document 1 is configured such that the outer peripheral end of the umbrella-shaped discharge-side check valve is in contact with the cylindrical inner peripheral surface forming the flow path. Even if pressure is applied to the discharge-side check valve, the discharge-side check valve is not opened unless the outer peripheral end of the discharge-side check valve is deformed radially inward. For this reason, there has been a problem that the operating force of the trigger necessary for operating the pump is increased.

  An object of the present invention is to provide a trigger type liquid ejector capable of discharging liquid with a small operating force.

That is, the gist configuration of the present invention is as follows.
1. Connected to the ejector body mounted on the mouth of the container containing the liquid, the nozzle mounted on the tip of the flow path provided in the ejector body, and the pump hole provided in the middle part of the flow path A pump that operates by operating a trigger, a valve member that is provided in the flow path and regulates the flow of liquid in the flow path in accordance with the operation of the pump in a direction from the container toward the nozzle, A trigger type liquid ejector comprising:
The valve member is
Suction that is arranged on the upstream side of the pump hole in the flow path and allows the flow of liquid from the container side toward the pump side and prevents the liquid flow from the pump side toward the container side A side check valve,
Discharge that is arranged on the downstream side of the pump hole in the flow path and permits the flow of liquid from the pump side toward the nozzle side and prevents the liquid flow from the nozzle side toward the pump side. A side check valve,
The inner peripheral surface forming the flow path is provided with a seal step portion that expands the diameter of the flow path from the pump side toward the nozzle side on the downstream side of the pump hole,
The discharge-type check valve is formed in an elastically deformable umbrella shape, and abuts against the seal step portion at an outer peripheral end thereof.

  The “upstream side” and “downstream side” of the flow path are defined on the basis of the flow of liquid from the container side to the nozzle side that is generated when the pump is operated, and are connected to the flow path container. The end to be connected is upstream with respect to the pump hole, and the tip connected to the nozzle of the flow path is downstream with respect to the pump hole.

2. The trigger liquid ejector according to claim 1, wherein the seal step is a surface perpendicular to the axial direction of the flow path.

3. The trigger liquid ejector according to 1 above, wherein the seal step portion is formed in a circular arc shape that protrudes toward the flow path.

4). The trigger liquid ejector according to claim 1, wherein the seal step is tapered.

5. The trigger-type liquid ejector according to any one of 1 to 4, wherein the discharge-side check valve has a divergent shape from the pump side toward the nozzle side.

6). A cylindrical body that is incorporated in the inside of the ejector body and forms a part of the flow path, the tapered sealing step portion is provided at the distal end of the cylindrical body, and the discharge-side check valve includes: Said 1 trigger type liquid ejector currently formed in the umbrella shape which becomes convex toward the upstream.

7). 6. The trigger type liquid ejector according to 6, wherein the discharge side check valve is disposed inside the cylindrical body.

8). Any one of the above 1 to 7, wherein the valve member includes a fixed portion fixed in the flow path, and the suction side check valve and the discharge side check valve are provided integrally with the fixed portion. Trigger type liquid ejector.

9. A rod-shaped portion is provided inside the discharge-side check valve, the rod-shaped portion abuts against the inner wall of the flow path, and the fixing portion is locked to a stepped portion formed on the inner peripheral surface forming the flow path. The 8 trigger type liquid ejector in which the valve member is fixed in the flow path.

10. The trigger type liquid ejector according to the above 8 or 9, wherein the suction side check valve is provided at a tip of an elastic support portion protruding from the fixed portion, and abuts against a valve seat provided in the flow path.

  According to the present invention, the inner peripheral surface forming the flow path is provided with a seal step portion that expands the diameter of the flow path from the pump side toward the nozzle side on the downstream side of the pump hole. Since it is formed in the shape of an elastically deformable umbrella and is in contact with the seal step at the outer peripheral end, by applying pressure to the discharge side check valve by the discharge operation of the pump, the discharge side check valve The discharge end check valve can be opened by deforming the outer peripheral end in the direction from the pump side toward the nozzle side.

  Therefore, according to the present invention, it is possible to provide a trigger type liquid ejector capable of discharging liquid with a small operating force.

It is sectional drawing of the trigger type liquid ejector which is one embodiment of this invention. FIG. 2 is a partially enlarged view of FIG. 1. It is a perspective view which shows the detail of the valve member shown in FIG. (A) is sectional drawing of the valve member shown in FIG. 3, (b) is sectional drawing which follows the AA line in (a), (c) is sectional drawing which follows the BB line in (a). is there. (A), (b) is sectional drawing which shows the modification of the seal step part shown in FIG. 2, respectively. It is sectional drawing which shows the modification of the seal | sticker step part and discharge side check valve which are shown in FIG. It is sectional drawing which shows the modification of the trigger type liquid ejector shown in FIG. FIG. 8 is a partially enlarged view of FIG. 7. It is a perspective view which shows the detail of the valve member shown in FIG.

  Hereinafter, the present invention will be described in more detail with reference to the drawings.

  A trigger type liquid ejector 1 according to an embodiment of the present invention shown in FIG. 1 is a container for storing liquids such as a mold removing agent, a detergent, a clothing paste, a residential wax, a hairdressing agent, and a fragrance. 2 to be used. The trigger type liquid ejector 1 includes an ejector body 11 attached to the mouth 2 a of the container 2.

  For example, the ejector body 11 made of resin includes a cylindrical mounting cylinder portion 12 corresponding to the mouth portion 2a of the container 2, and the mounting cylinder portion 12 is associated with a flange portion 12a provided on the outer peripheral surface thereof. It is stopped and the mounting cap 13 is mounted. A female screw 13a is provided on the inner peripheral surface of the mounting cap 13, and the mounting cap 13 is screwed to the male screw 2b of the mouth portion 2a of the container 2 with the female screw 13a, whereby the ejector body 11, that is, the trigger type liquid ejector 1 is provided. Can be attached to the mouth 2a of the container 2. In addition, the code | symbol 14 is a sealing member which seals between the opening part 2a of the container 2, and the collar part 12a.

  The ejector body 11 includes an upright portion 15 that extends upward from the mounting cylinder portion 12, and an extended portion 16 that extends from the upper end of the upright portion 15 toward the side (in a direction orthogonal to the upright portion 15). It is formed in the external shape substantially L shape provided with. Inside the ejector body 11, there is provided a flow path P that extends in the vertical direction in the portion of the upright portion 15 and extends in the horizontal direction in the portion of the extension portion 16. A cylindrical cylindrical body 17 extending in the vertical direction is incorporated in the upright portion 15, and the inside of the cylindrical body 17 serves as a flow path P in the upright portion 15. The cylindrical body 17 is partly cut out at the upper end, and the notched portion 17a connects the inner portion of the cylindrical body 17 and the inner portion of the extending portion 16 of the flow path P. ing. Further, a suction tube 18 to be inserted into the container 2 is connected to the lower end of the cylindrical body 17.

  A cylindrical mounting portion 16a is provided at the tip of the extension portion 16 of the ejector body 11, and a nozzle 19 is mounted on the mounting portion 16a in a state in which the nozzle 19 is prevented from coming off in the direction along the central axis. A tip which is the discharge side of the flow path P is opened inside the mounting portion 16a. That is, the nozzle 19 communicates with the tip of the flow path P. The nozzle 19 is provided with an ejection hole 19a having a sufficiently smaller cross-sectional area than the flow path P. The liquid supplied to the nozzle 19 through the flow path P is sprayed or foamed from the ejection hole 19a to the outside. Erupted as a shape. In addition, it can also be set as the structure which can be switched to an open state and a closed state by attaching this nozzle 19 to the mounting part 16a so that rotation is possible, and rotating the nozzle 19. FIG.

  The nozzle 19 is provided with a nozzle cover 19b that can be freely opened and closed. The nozzle cover 19b is closed to cover the entire surface of the nozzle 19, and the liquid is ejected from the nozzle hole 19a. It is possible to form bubbles more effectively through the formed bubble generation holes 19c.

  The ejector body 11 is provided with a pump 21. The pump 21 has a cylinder 22 that is provided integrally with the ejector body 11 and extends in a direction parallel to the extension 16, and a cylindrical piston 23 with one end closed in the cylinder 22. It is mounted to move freely. An annular seal portion 23 b is integrally provided on the outer peripheral surface of the cylindrical portion 23 a of the piston 23, and the seal portion 23 b is in sliding contact with the inner peripheral surface of the cylinder 22. Further, a rod-like projection 23c is integrally provided on the axis of the piston 23, and this rod-like projection 23c is disposed inside the cylinder 22 inside the partitioning cylinder 24 provided coaxially therewith.

  The rod-shaped protrusion 23 c has a slightly tapered outer peripheral surface and has a gap with the inner peripheral surface of the partition tube portion 24. A plurality of groove portions 24 a extending along the axial direction are provided on the outer peripheral surface of the partition tube portion 24. Thereby, the area | region inside the division cylinder part 24 is an area | region divided by the cylinder 22, piston 23, and the division cylinder part 24 via the clearance gap between the rod-shaped projection part 23c and the division cylinder part 24, and the groove part 24a. Communicate.

  The inner region of the partition cylinder portion 24 is connected to the middle portion of the flow path P by a suction hole 25 as a pump hole that penetrates the cylinder body 17 in the radial direction. A region defined by the cylinder 22, the piston 23, and the partition cylinder portion 24 is connected to a middle portion of the flow path P by a discharge hole 26 as a pump hole penetrating the cylinder 17 and the ejector body 11. . Thus, the pump 21 is connected to the suction hole 25 and the discharge hole 26 provided in the middle part of the flow path P.

  The ejector body 11 is mounted with a trigger (operation lever) 32 that is rotatably supported by a pivot 31. A connecting piece 23d is integrally provided at the tip of the piston 23. The connecting piece 23d is rotatably connected to the trigger 32 by a pin member 33 in a state where the connecting piece 23d is inserted into a hole 32a provided in an intermediate portion of the trigger 32. Has been. Further, the tip of a curved leaf spring 34 having one end fixedly held by the ejector body 11 is locked to the trigger 32, and the leaf spring 34 causes the trigger 32 to move away from the pump 21 (in the figure, the pivot axis). (Clockwise direction around the center). In addition, the ejector body 11 and the pump 21 are covered with the cover C, and the trigger 32 protrudes from below the cover C.

  By manually operating the trigger 32 and pulling it toward the pump 21 to the stroke end position indicated by a two-dot chain line in FIG. 1, the piston 23 can be pushed into the cylinder 22 and the pump 21 can be discharged. Further, by releasing the operation of the trigger 32, the trigger 32 can be returned to the initial position by the elastic force of the leaf spring 34, and the pump 21 can be inhaled. In this way, the pump 21 is operated by repeating the pulling operation and the releasing operation of the trigger 32, and the liquid in the container 2 is sucked into the pump 21 from the suction hole 25 through the flow path P, and the pump 21. The liquid sucked in can be discharged from the discharge hole 26 into the flow path P.

  The cylinder 22 is provided with an intake hole 35 exposed to the outside when the trigger 32 is pulled to the stroke end, and air sucked from the intake hole 35 is provided with a vent hole 36a provided in the lid wall 36. As a result of being sucked into the container 2 through the air, air is replaced in the container 2 by the amount of the liquid ejected.

  A valve member 41 is provided inside the flow path P in order to regulate the flow of the liquid inside the flow path P accompanying the operation of the pump 21 in the direction from the container 2 side toward the nozzle 19 side. In the illustrated case, the valve member 41 is arranged vertically along the flow path P at a position adjacent to the pump 21 inside the cylinder body 17. The valve member 41 is made of resin, and as shown in FIGS. 2 to 4, the fixed portion 42, the suction side check valve 43, and the discharge side check valve 44 are integrally formed.

  The fixing portion 42 is formed in a disc shape and is fixed to a portion in the flow path P between the suction hole 25 and the discharge hole 26. The fixing portion 42 closes the flow path P at the fixing portion, and thus the flow path P is partitioned into a side where the suction hole 25 opens and a side where the discharge hole 26 opens.

  A step surface (step portion) 45 is provided on the inner peripheral surface forming the flow path P between the suction hole 25 and the discharge hole 26, and the fixing portion 42 contacts the step surface 45 from above. It touches. In addition, a columnar connecting portion 46 having a cross-shaped cross section is integrally provided on the upper surface of the fixed portion 42, and a rod-like portion 47 provided coaxially and integrally with the upper end of the connecting portion 46 is provided below the flow path P. It is in contact with the inner wall facing from the lower side. Thus, the fixed portion 42 has one end surface abutting on the stepped surface 45 from the upper side, and the rod-shaped portion 47 provided integrally therewith abuts on the inner wall of the channel P from the lower side. It is fixed so that it cannot move along the flow path P. The valve member 41 is inserted into the cylindrical body 17 and then incorporated into the ejector body 11 together with the cylindrical body 17.

  The fixing portion 42 is not limited to the above-described configuration, and may be configured to be fixed in the flow path P by other means such as press fitting or adhesion.

  An elastic support portion 49 that protrudes downward is integrally provided on the lower surface of the fixed portion 42, and a suction side check valve 43 is integrally provided at the tip (lower end) of the elastic support portion 49. The suction-side check valve 43 is formed in a columnar shape having an outer diameter smaller than the inner diameter of the flow path P, its lower end is hemispherical, and a recess 43a is provided in the shaft center of the lower end. . On the other hand, the elastic support portion 49 is formed in a meandering shape that curves to the left and right, and is elastically deformable in the vertical direction along the flow path P.

  A valve seat 50 formed in a tapered surface (conical surface) shape whose diameter decreases toward the lower side of the flow path P on the inner peripheral surface forming the flow path P on the upstream side (container 2 side) from the suction hole 25. Are provided integrally. The suction side check valve 43 is biased by the elastic support portion 49, contacts the valve seat 50 from the upper side upstream of the suction hole 25, and flows through a hole 50 a provided in the center of the valve seat 50. Is blocked. With such a configuration, the suction side check valve 43 allows the flow of liquid from the upstream side with respect to the suction hole 25 in the flow path P, that is, the flow of liquid from the container 2 side toward the pump 21 side. However, it functions as a check valve that prevents the flow of liquid from the pump 21 side in the flow path P toward the container 2 side.

  In the present embodiment, the valve seat 50 is provided on the upstream side of the suction hole 25 and adjacent to the suction hole 25. By adopting such a configuration, a gap generated between the suction side check valve 43 and the valve seat 50 when the suction side check valve 43 is opened is separated from the outer peripheral surface of the suction side check valve 43 and the flow path. The flow rate of the liquid flowing from the flow hole 50a of the valve seat 50 toward the suction hole 25 is increased by directly communicating with the suction hole 25 without a gap between the inner peripheral surface forming P and the pump 21. The operating efficiency can be further increased.

  The discharge-side check valve 44 is formed in an umbrella shape that protrudes coaxially with the rod-shaped portion 47 from the upper end of the connecting portion 46 upward and expands so that the outer diameter increases upward. It is arranged on the downstream side of the discharge hole 26. In addition, on the inner peripheral surface that forms the flow path P, a seal step portion 48 that expands the diameter of the flow path P from the pump 21 side toward the nozzle 19 side is provided on the downstream side of the discharge hole 26. The discharge-side check valve 44 is elastically deformable in the radial direction, and abuts against the seal step 48 of the flow path P at the outer peripheral end thereof. A part of the base end side of the rod-like portion 47 is disposed inside the discharge-side check valve 44. The discharge-side check valve 44 is directed downstream from the discharge hole 26 by being deformed in a direction from the pump 21 side toward the nozzle 19 side so that the outer peripheral end thereof is separated from the seal step portion 48 of the flow path P. The flow of the liquid, that is, the flow of the liquid from the pump 21 side to the nozzle 19 side in the flow path P is allowed, but when the outer peripheral end abuts on the seal step portion 48 of the flow path P, It functions as a check valve that prevents the flow of liquid from the nozzle 19 side toward the pump 21 side.

  By providing such a valve member 41 in the flow path P, the flow direction of the liquid in the flow path P when the pump 21 is operated is regulated in the direction from the container 2 side toward the nozzle 19 side. That is, when the trigger 32 is operated and the pump 21 discharges, the liquid in the pump 21 is pressurized and discharged from the discharge hole 26 to the flow path P. When liquid is discharged from the discharge hole 26 into the flow path P, the discharge side check valve 44 is elastically deformed and opened in the direction from the pump 21 side to the nozzle 19 side due to the pressure of the liquid. To the nozzle 19 through the flow path P. At this time, the suction side check valve 43 is maintained in a state of being pressed against the valve seat 50 by the elastic support portion 49, so that the liquid flow from the pump 21 side toward the container 2 side is the suction side check valve 43. The liquid in the pump 21 can be reliably pumped from the container 2 toward the nozzle 19 by the discharge operation of the pump 21.

  A plurality of protrusions (guides) 46 a that protrude radially outward from the outer peripheral surface and contact the inner peripheral surface forming the flow path P are arranged on the outer peripheral surface of the connecting portion 46 at equal intervals in the circumferential direction. it can. By providing such a projection 46a, deformation of the valve member 41 during operation of the pump 21 can be prevented, and the discharge-side check valve 44 can function more reliably as a check valve.

  On the other hand, when the operation of the trigger 32 is released and the pump 21 performs the suction operation, the pressure inside the pump 21 becomes negative and the suction side check valve 43 moves away from the valve seat 50 and is opened. Is sucked into the pump 21 through the flow path P, the flow hole 50a of the valve seat 50 and the suction hole 25. At this time, the discharge-side check valve 44 is maintained in a closed state, and the flow of liquid from the nozzle 19 side toward the pump 21 side in the flow path P is blocked by the discharge-side check valve 44. With this suction operation, the liquid in the container 2 can be reliably sucked toward the pump 21.

  As described above, the pulling operation and the releasing operation of the trigger 32 are repeated to operate the pump 21, and the flow of the liquid in the flow path P accompanying the operation of the pump 21 is caused by the valve member 41 provided in the flow path P. By regulating the direction from the container 2 side to the nozzle 19 side, the liquid in the container 2 can be sucked and discharged by the pump 21 and ejected from the nozzle 19 to the outside. At this time, since the valve member 41 is fixed in the flow path P in the fixing portion 42, the liquid is sucked and discharged by the pump 21 with the operation of the pump 21, and the suction side check valve 43 and the discharge side check valve are discharged. Even when the valve 44 is opened and closed, the valve member 41 does not move in the flow path P. Therefore, the suction-side check valve 43 and the discharge-side check valve 44 can function reliably as check valves. Therefore, the liquid sucked and discharged by the pump 21 can be reliably pumped from the container 2 side toward the nozzle 19 side, and the operating efficiency of the pump 21 can be improved.

  In the present embodiment, the fixing portion 42 is formed in a disc shape, and the flow path P is partitioned into a suction side and a discharge side, but instead of this, the fixing portion 42 formed in a disc shape has a liquid. It is also possible to provide a passage portion and allow the liquid sucked from the container 2 side to pass through the fixing portion 42 along the flow path P through the liquid passage portion. With such a configuration, when the pump 21 performs the suction operation, the liquid sucked into the flow path P from the container 2 is not only from the suction hole 25 but also from the discharge hole 26 through the liquid passage part. Can be inhaled. When the pump 21 discharges, not only the liquid in the pump 21 is pumped from the discharge hole 26 toward the nozzle 19 but also the liquid discharged from the suction hole 25 is directed toward the nozzle 19 through the liquid passage portion. Can be pumped. Therefore, the operating efficiency of the pump 21 can be further increased.

  The liquid passage part provided in the fixed part 42 is fixed in the flow path P, such as a groove-like one extending along the flow path P on the outer peripheral surface of the fixed part 42 or a through-hole-like one penetrating the fixed part 42. As long as the liquid can be passed through the fixing part 42 along the flow path P, it can be formed as variously shaped grooves or gaps. Further, the number of liquid passage portions provided in the fixed portion 42 can be arbitrarily set.

  When the liquid passage portion is provided in the fixed portion 42, the suction side check valve 43 may be disposed on the upstream side of the suction hole 25 and the discharge side check valve 44 may be disposed on the downstream side of the discharge hole 26. If possible, the fixing portion 42 can be arranged not only in the portion between the suction hole 25 and the discharge hole 26 in the flow path P but also in an arbitrary position. Also, without providing the suction hole 25 and the discharge hole 26, only one pump hole for connecting the inside of the flow path P to the pump 21 is provided between the suction side check valve 43 and the discharge side check valve 44. It can also be configured.

  Further, if the liquid passage portion is provided at a fixed portion of the fixing portion 42 in the flow path P, for example, the liquid passage portion may be provided on the inner peripheral surface that forms the flow path P. That is, a groove-like or gap-like liquid passage portion that communicates the upstream side and the downstream side of the flow channel P with the fixed portion 42 interposed therebetween is provided on the inner peripheral surface and the step surface 45 that form the flow channel P, and this liquid passage A configuration may also be adopted in which the liquid is allowed to flow through the fixed portion 42 along the flow path P through the portion. Further, the liquid passage part can be provided on both the fixed part 42 and the inner peripheral surface forming the flow path P. In this case, one liquid passage part can be configured by combining the liquid passage part provided in the fixed part 42 and the liquid passage part provided on the inner peripheral surface forming the flow path P.

  In the present invention, as described above, the discharge-side check valve 44 is formed in an elastically deformable umbrella shape, but the outer peripheral end having the largest outer diameter is formed in a cylindrical inner shape forming the flow path P. Rather than being brought into contact with the peripheral surface, the flow path P is brought into contact with a seal step 48 that expands from the pump 21 side toward the nozzle 19 side.

  For example, in the case of the present embodiment shown in FIG. 2, the seal step portion 48 is a surface perpendicular to the axial direction of the flow path P, and the outer peripheral end of the discharge-side check valve 44 is placed on the inner peripheral edge of this surface from above. It is in contact. Therefore, by applying pressure to the discharge side check valve 44 by the discharge operation of the pump 21, the outer peripheral end of the discharge side check valve 44 is deformed in the direction from the pump 21 side toward the nozzle 19 side, and the discharge side check valve 44 is deformed. The check valve 44 can be opened.

  The configuration of the seal step portion 48 that expands the diameter of the flow path P from the pump 21 side toward the nozzle 19 side is not limited to the configuration shown in FIG. 2 and can be variously changed.

  For example, as in the modification shown in FIG. 5A, the seal step portion 48 may be formed in a circular arc shape that protrudes toward the flow path P. Further, as in the modification shown in FIG. 5B, the seal step portion 48 may be formed in a tapered shape.

  In this manner, the outer peripheral end of the discharge-side check valve 44 is in contact with the seal step portion 48 that expands the diameter of the flow path P from the pump 21 side toward the nozzle 19 side. When the pressure of the liquid discharged from the pump 21 is applied to the discharge side check valve 44, the outer peripheral end of the discharge side check valve 44 is deformed in the direction from the pump 21 side toward the nozzle 19 side. The discharge side check valve 44 can be opened. Further, since the outer peripheral end of the discharge-side check valve 44 is not in contact with the cylindrical inner peripheral surface forming the flow path P, but is in contact with the seal step 48, the discharge-side check valve 44 is When the outer peripheral end of the tube is deformed, the deformation is not hindered by friction between the outer peripheral end and the cylindrical inner peripheral surface forming the flow path P. Therefore, since the opening pressure of the discharge side check valve 44 is lowered, the trigger 32 necessary for operating the pump 21 when the pump 21 is operated by operating the trigger 32 and liquid is ejected from the nozzle 19 is operated. The operation force of this trigger type liquid ejector 1 can be made lighter and easier.

  When the cylindrical body 17 constituting a part of the flow path P is incorporated inside the ejector body 11 as in the present embodiment, a seal step 48 is provided at the tip of the cylindrical body 17. It can also be configured. In FIG. 6, the cylindrical body 17 is formed in a shape (length) whose tip is positioned below the opening position to the standing part 15 of the flow path P provided inside the extension part 16, The case where the taper-shaped seal step part 48 is provided in the front-end | tip (upper end) of the cylinder 17 is shown. As described above, when the cylindrical body 17 is incorporated inside the ejector body 11 and the tip of the cylindrical body 17 causes a step on the inner peripheral surface of the flow path P, the step is set to the discharge-side check valve. 44 can be used as a seal step portion 48 that abuts the outer peripheral end of 44.

  In the modification shown in FIG. 6, the discharge-side check valve 44 is formed in an umbrella shape that is convex toward the upstream side. That is, the discharge-side check valve 44 includes a substantially disc-shaped base 44a that is slightly tapered on the inner peripheral side thereof, and a tapered shape that is inclined outside the base 44a at a larger angle than the base 44a. The seal portion 44b is integrally provided. The seal portion 44b is formed in a shape extending along the seal step portion 48, and the discharge-side check valve 44 is in contact with the seal step portion 48 not only at the outer peripheral end but also at the outer surface of the seal portion 44b. Yes. Thus, when pressure is applied to the discharge side check valve 44 by the discharge operation of the pump 21, the pressure is received by the seal portion 44b, and the outer peripheral end of the discharge side check valve 44 is sealed with a smaller pressure. The part 48 can be opened. Therefore, the operation of the trigger type liquid ejector 1 can be made lighter and easier. Further, when the pump 21 is performing a suction operation, the outer peripheral end of the discharge-side check valve 44 and the seal portion 44b abut against the seal step portion 48, so that the nozzle 19 side in the flow path P is changed to the pump 21 side. The flow of liquid toward the nozzle can be reliably prevented by the discharge side check valve 44.

  In the above configuration, the discharge side check valve 44 is disposed inside the cylindrical body 17. That is, the discharge side check valve 44 is disposed below the tip of the cylindrical body 17 in a state where the discharge side check valve 44 is in contact with the seal step portion 48. Thereby, for example, when the valve member 41 is mounted inside the cylinder body 17 and then the cylinder body 17 is assembled into the ejector body 11, the discharge side check valve 44 is protected inside the cylinder body 17. The discharge-side check valve 44 can be prevented from coming into contact with other members or the like and being damaged.

  7 is a cross-sectional view showing a modification of the trigger type liquid ejector shown in FIG. 1, FIG. 8 is a partially enlarged view of FIG. 7, and FIG. 9 is a perspective view showing details of the valve member shown in FIG. It is. 7 to 9, members corresponding to those described above are denoted by the same reference numerals, and detailed description thereof is omitted.

  The trigger type liquid ejector 1 of the modification shown in FIG. 7 has a configuration in which only one pump hole 60 is provided as a pump hole for connecting the flow path P to the pump 21. That is, in the trigger type liquid ejector 1 shown in FIG. 1, two pump holes of the suction hole 25 and the discharge hole 26 are provided as pump holes for connecting the flow path P to the pump 21. In the modification shown in FIG. 1, only one pump hole 60 is provided.

  7 to 9, the sealing step 48 is provided at the tip of the cylindrical body 17 as in the case shown in FIG. 6. On the other hand, in the modified example shown in FIG. 7, a member in which the cylinder 22 and the partition tube portion 24 are integrally formed is assembled to the ejector body 11, and the member is partitioned by the cylinder 22 and the partition tube portion 24. An annular cylinder chamber is connected to the flow path P via the pump hole 60.

  As shown in FIGS. 8 and 9, also in this modified example, the valve member 41 has a configuration in which a fixed portion 42, a suction side check valve 43 and a discharge side check valve 44 are integrally formed, The suction side check valve 43 is connected to the fixed portion 42 via an elastic support portion 49, and the discharge side check valve 44 is connected to the fixed portion 42 via a columnar connecting portion 46.

  In this modification, the fixing portion 42 is fixed in the flow path P on the downstream side of the pump hole 60. The fixing portion 42 is formed in a cross shape having four prismatic protrusion portions 42a in order to provide a liquid passage portion for flowing the liquid discharged from the pump hole 60 toward the downstream side. Thus, by forming the fixing portion 42 in a cross shape having four protrusion portions 42a instead of a disc shape, the fixing portion 42 is discharged from the pump hole 60 through the liquid passage portion provided between the protrusion portions 42a. The liquid can flow through the fixing portion 42 to the downstream side.

  In the case shown in the figure, the fixed portion 42 has one end surface abutting against a step surface (step portion) 45 provided on the inner peripheral surface of the flow path P and the other end surface protruding from the inner peripheral surface of the flow path P. The annular projection 61 is fixed in the flow path P by undercut engagement. With such a configuration, the valve member 41 can be reliably fixed in the flow path P without providing the rod-shaped portion 47.

  In this modification as well, if the liquid passage portion is provided at a fixing portion of the fixing portion 42 in the flow path P, for example, a groove or the like is provided on the inner peripheral surface forming the flow path P. It is also possible to provide both the fixed portion 42 and the inner peripheral surface forming the flow path P.

  In the modification shown in FIGS. 7 to 9, the discharge-side check valve 44 is formed in an umbrella shape that is convex toward the upstream side, similarly to the case shown in FIG. 6. That is, the discharge-side check valve 44 includes a substantially disc-shaped base portion 44a that is slightly tapered on the inner peripheral side thereof, and has a tapered shape that is inclined outside the base portion 44a at a larger angle than the base portion 44a. The seal portion 44b is integrally formed. Thereby, also in this modification, the outer peripheral end of the discharge-side check valve 44 is opened from the seal step portion 48 with a smaller pressure, so that the operation of the trigger type liquid ejector 1 is lighter and easier. It can be.

  7 to 9, the discharge-side check valve 44 is disposed inside the cylindrical body 17. Thereby, it can prevent that the discharge side check valve 44 with which the inner side of the cylinder 17 was mounted | worn contacts with another member etc., and is damaged.

  It goes without saying that the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the invention.

  For example, the pump 21 is not limited to the structure shown in the above embodiment, but can be operated by the operation of the trigger 32 to suck and discharge liquid between the pump 21 and the flow path P. If it is a thing, the thing of various structures can be used.

  In addition, the suction side check valve 43 is not limited to the structure shown in the above embodiment, and may have various configurations as long as it can function as a check valve for opening and closing the suction flow path P. it can. Furthermore, the valve member 41 is not limited to the structure in which the suction side check valve 43 and the discharge side check valve 44 are integrally formed as shown in the above embodiment, but the suction side check valve 43 or The discharge-side check valve 44 may be a separate structure. For example, when the suction side check valve 43 is provided separately, a ball valve or the like can be used as the suction side check valve 43.

DESCRIPTION OF SYMBOLS 1 Trigger type liquid ejector 2 Container 2a Mouth part 2b Male screw 11 Ejector main body 12 Mounting cylinder part 12a Gutter part 13 Mounting cap 13a Female screw 14 Seal member 15 Standing part 16 Extension part 16a Mounting part 17 Cylindrical body 17a Notch part 18 Tube 19 Nozzle 19a Ejection hole 19b Nozzle cover 19c Foam generation hole 21 Pump 22 Cylinder 23 Piston 23a Cylindrical part 23b Sealing part 23c Rod-like protrusion 23d Connecting piece 24 Partition cylinder part 24a Groove part 25 Suction hole (pump hole)
26 Discharge hole (pump hole)
31 Pivot 32 Trigger 32a Hole 33 Pin Member 34 Leaf Spring 35 Intake Hole 36 Lid Wall 36a Vent Hole 41 Valve Member 42 Fixing Part 42a Projection Part 43 Suction Side Check Valve 43a Recess 44 Discharge Side Check Valve 44a Base 44b Sealing Part 45 Step surface (step)
46 connection part 46a protrusion 47 rod-like part 48 seal step part 49 elastic support part 50 valve seat 50a flow hole 60 pump hole 61 annular convex part P flow path C cover

Claims (10)

Connected to the ejector body mounted on the mouth of the container containing the liquid, the nozzle mounted on the tip of the flow path provided in the ejector body, and the pump hole provided in the middle part of the flow path A pump that operates by operating a trigger, a valve member that is provided in the flow path and regulates the flow of liquid in the flow path in accordance with the operation of the pump in a direction from the container toward the nozzle, A trigger type liquid ejector comprising:
The valve member is
Suction that is arranged on the upstream side of the pump hole in the flow path and allows the flow of liquid from the container side toward the pump side and prevents the liquid flow from the pump side toward the container side A side check valve,
Discharge that is arranged on the downstream side of the pump hole in the flow path and permits the flow of liquid from the pump side toward the nozzle side and prevents the liquid flow from the nozzle side toward the pump side. A side check valve,
The inner peripheral surface forming the flow path is provided with a seal step portion that expands the diameter of the flow path from the pump side toward the nozzle side on the downstream side of the pump hole,
The discharge-type check valve is formed in an elastically deformable umbrella shape, and abuts against the seal step portion at an outer peripheral end thereof.   The trigger type liquid ejector according to claim 1, wherein the seal step portion is a surface perpendicular to the axial direction of the flow path.   The trigger type liquid ejector according to claim 1, wherein the seal step portion is formed in a circular arc shape that is convex toward the flow path.   The trigger type liquid ejector according to claim 1, wherein the seal step portion is formed in a tapered shape.   The trigger type liquid ejector according to any one of claims 1 to 4, wherein the discharge-side check valve has a divergent shape from the pump side toward the nozzle side.   A cylindrical body that is incorporated in the inside of the ejector body and forms a part of the flow path, the tapered sealing step portion is provided at the distal end of the cylindrical body, and the discharge-side check valve includes: The trigger type liquid ejector according to claim 1, wherein the trigger type liquid ejector is formed in an umbrella shape that protrudes toward the upstream side.   The trigger type liquid ejector according to claim 6, wherein the discharge-side check valve is disposed inside the cylindrical body.   The said valve member is provided with the fixing | fixed part fixed in the said flow path, The said suction side check valve and the said discharge side check valve are provided in one with the said fixing | fixed part. The trigger type liquid ejector of Claim 1.   A rod-shaped portion is provided inside the discharge-side check valve, the rod-shaped portion abuts against the inner wall of the flow path, and the fixing portion is locked to a stepped portion formed on the inner peripheral surface forming the flow path. The trigger type liquid ejector according to claim 8, wherein the valve member is fixed in the flow path.   The trigger type liquid ejector according to claim 8 or 9, wherein the suction-side check valve is provided at a tip of an elastic support portion protruding from the fixed portion, and abuts against a valve seat provided in the flow path.

Images