JP6121308B2 - Trigger type liquid ejector - Google Patents

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 in the middle of the flow path. When this pump is activated, the liquid in the container is pumped along the flow path and ejected from the nozzle to the outside.

  In such a trigger type liquid ejector, a pump having a cylinder and a piston is generally used. In this case, a seal piece protruding radially outward from the outer peripheral surface is integrally provided on the outer peripheral surface of the piston, and the seal piece slides into contact with the inner peripheral surface of the cylinder so that there is no gap between the cylinder and the piston. It is designed to be sealed. Further, the piston is connected to a trigger at its tip, and when the trigger is operated, the piston is pushed into the cylinder to pump the liquid into the flow path (see, for example, Patent Document 1).

JP 2000-302154 A

  However, in the conventional trigger type liquid ejector, since the piston is configured to be connected to the trigger at the tip, for example, the container to which the trigger type liquid ejector is attached together with other products in a shopping basket or the like. The piston is tilted with respect to the cylinder when it is inserted and the trigger is pushed laterally by another product, or when the trigger is operated obliquely during use and a lateral force is applied to the trigger. When the piston is tilted with respect to the cylinder, the seal piece is excessively deformed, the sealing performance between the piston and the cylinder is lowered, and liquid leakage may occur.

  An object of the present invention is to provide a trigger type liquid ejector that does not cause liquid leakage even when a lateral force is applied to the trigger. It is in.

The trigger type liquid ejector according to the present invention includes an ejector body attached to a mouth portion of a container for storing liquid, a nozzle attached to a tip of a flow path provided in the ejector body, and an operation of the trigger. A trigger-type liquid ejector that operates and pumps the liquid in the container to the nozzle through the flow path, the pump communicating with the flow path at one end; A piston that is mounted on the inside so as to be movable in the direction along the central axis, and is connected to the trigger at the tip, is provided integrally with the outer peripheral surface of the piston, and protrudes from the outer peripheral surface to the inner peripheral surface of the cylinder. An annular seal piece that is in sliding contact with the outer peripheral surface of the piston on the opening side of the cylinder with respect to the seal piece, and protrudes from the outer peripheral surface to the inner peripheral surface of the cylinder. And support projections, were closed contact, opening to the intake hole is provided between the said cylinder the supporting projections and the sealing piece, the outside air introduction portion for introducing the outside air into the air inlet is provided in the support protrusion It is characterized that you have.

  According to the present invention, in the above configuration, the seal piece is preferably formed in an umbrella shape that protrudes from the outer peripheral surface of the piston in an inclined direction toward the side opposite to the support protrusion.

  According to the present invention, in the above configuration, an umbrella-like shape that protrudes from the outer peripheral surface of the piston toward the side opposite to the support protrusion is inclined toward the support protrusion side relative to the seal piece on the outer peripheral surface of the piston. It is preferable that the auxiliary seal piece is provided integrally.

  According to the present invention, in the above-mentioned configuration, it is preferable that an auxiliary protrusion protruding from the outer peripheral surface is provided outside the support protrusion on the outer peripheral surface of the piston.

  According to the present invention, in the above configuration, an outer peripheral surface of the piston is disposed between the trigger and the opening end of the cylinder to restrict the operation of the trigger, and between the support protrusion and the auxiliary protrusion. It is preferable to include a stopper formed integrally with a C-shaped mounting piece that is detachably mounted on the head.

  In the present invention, it is preferable that a partition tube portion is provided coaxially inside the cylinder, and a rod-like protrusion disposed inside the partition tube portion is integrally provided on the axial center of the piston.

  According to the present invention, since the support protrusion protruding from the outer peripheral surface and slidingly contacting the inner peripheral surface of the cylinder is integrally provided on the outer peripheral surface of the piston closer to the opening side of the cylinder than the seal piece, the lateral force is applied to the trigger. The lateral load applied to the piston when the is applied can be supported by the support protrusion, and the deformation of the seal piece due to the lateral load can be suppressed. Thereby, even if a lateral force is applied to the trigger, it is possible to prevent liquid leakage from the pump portion.

It is sectional drawing of the trigger type liquid ejector which is one embodiment of this invention. It is an expanded sectional view which expands and shows the principal part of the trigger type liquid ejector shown in FIG. It is sectional drawing which follows the AA line in FIG. It is sectional drawing which shows the modification of the support protrusion shown in FIG. (A) is a front view, a side view, and a rear view of the stopper shown in FIG. 1, and (b) is a perspective view of the stopper 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 can be attached to the mouth 2 a 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. As shown in FIG. 2, the pump 21 has a cylinder 22 that is provided integrally with the ejector body 11 and extends in a direction parallel to the extending portion 16, and a cylinder whose one end is closed inside the cylinder 22. A piston 23 is mounted so as to be movable in a direction along its central axis.

  An annular seal piece 23 b is integrally provided on the outer peripheral surface of the cylindrical portion 23 a of the piston 23. The seal piece 23b is formed in a thin umbrella shape that protrudes radially outward from the outer peripheral surface of the cylindrical portion 23a and tilts toward the bottom side of the cylinder 22, and at the outer peripheral end of the cylinder 22 The space between the cylinder 22 and the piston 23 is sealed in sliding contact with the inner peripheral surface.

  Further, an auxiliary seal piece 23c is integrally provided on the outer peripheral surface of the cylindrical portion 23a of the piston 23 so as to be arranged on the opening side of the cylinder 22 with a space from the seal piece 23b. Like the seal piece 23b, the auxiliary seal piece 23c is formed in a thin umbrella shape protruding from the outer peripheral surface of the cylindrical portion 23a toward the outside in the radial direction and inclined toward the bottom side of the cylinder 22. The outer peripheral end is in sliding contact with the inner peripheral surface of the cylinder 22.

  On the other hand, a rod-like protrusion 23d is integrally provided on the axial center of the piston 23, and this rod-like protrusion 23d is disposed inside the cylinder 22 inside the cylinder 22 provided coaxially therewith. The rod-shaped protrusion 23 d 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 23d and the division cylinder part 24, and the groove part 24a. Communicate.

  A region inside the partition cylinder portion 24 of the cylinder 22 is connected to a middle portion of the flow path P by a suction hole 25 penetrating the cylinder 17 in the radial direction. A region defined by the piston 23 of the cylinder 22 and the partition cylinder portion 24 is connected to a middle portion of the flow path P by a discharge hole 26 that penetrates the cylinder body 17 and the ejector body 11. As described above, the cylinder 22 of the pump 21 communicates with the middle portion of the flow path P through the suction hole 25 and the discharge hole 26 at one end thereof.

  The ejector body 11 is mounted with a trigger (operation lever) 32 that is rotatably supported by a pivot 31. A connecting piece 23e is integrally provided at the tip of the piston 23. The connecting piece 23e is rotatably connected to the trigger 32 by a pin member 33 in a state where the connecting piece 23e 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.

  As described above, since the trigger 32 is connected to the tip of the piston 23, the trigger 32 is manually operated and pulled toward the pump 21 to the stroke end position indicated by the two-dot chain line in FIG. The pump 21 can be discharged by pushing 23 into the cylinder 22. 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 of the trigger 32 and the releasing operation thereof, and the liquid in the container 2 is sucked into the pump 21 from the suction hole 25 through the flow path P. The liquid sucked into 21 can be discharged from the discharge hole 26 into the flow path P.

  The cylinder 22 is provided with an intake hole 35 that is exposed to the outside when the trigger 32 is pulled to the stroke end, and air sucked from the intake hole 35 is passed through a vent hole 36 a provided in the lid wall 36. By being sucked into the container 2, the 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. 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 of a resin material, and the fixed portion 42 formed in a disk shape has a flow path P. It is fixed in the portion between the suction hole 25 and the discharge hole 26 and positioned in the flow path P. 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 taper surface (conical surface) shaped valve seat 45 that is reduced in diameter toward the lower side of the flow path P is integrally provided on the inner peripheral surface of the flow path P closer to the container 2 than the suction hole 25. The check valve 43 abuts against the valve seat 45 in a biased state, and allows the flow of liquid from the container 2 side in the flow path P toward the pump 21 side, but on the pump 21 side in the flow path P. The flow of the liquid toward the container 2 side is prevented. On the other hand, the discharge-side check valve 44 increases in diameter so that the outer diameter increases toward the upper side and is formed in an umbrella shape that is elastically deformable in the radial direction, and contacts the inner peripheral surface of the flow path P at the outer peripheral end. In contact therewith, the liquid flow from the pump 21 side in the flow path P toward the nozzle 19 side is allowed, but the liquid flow from the nozzle 19 side in the flow path P toward the pump 21 side is prevented. ing.

  With such a configuration, the pump 21 is operated by repeating the pulling operation and the releasing operation of the trigger 32, and the flow of the liquid in the flow path P accompanying the operation of the pump 21 is a valve provided in the flow path P. By regulating the direction from the container 2 side to the nozzle 19 side by the member 41, the liquid in the container 2 can be pumped toward the nozzle 19 by the pump 21 and ejected from the nozzle 19 to the outside. .

  In the trigger type liquid ejector 1, in order to prevent the piston 23 from tilting with respect to the cylinder 22, a support protrusion is provided on a portion closer to the opening side of the cylinder 22 than the seal piece 23 b on the outer peripheral surface of the cylindrical portion 23 a of the piston 23. 51 is provided integrally. As shown in FIG. 3, the support protrusion 51 extends in a ring shape along the circumferential direction on the outer peripheral surface of the cylindrical portion 23 a of the piston 23 and protrudes radially outward from the outer peripheral surface of the cylindrical portion 23 a. The outer peripheral surface is in sliding contact with the inner peripheral surface of the cylinder 22.

  The support protrusion 51 comes into contact with the inner peripheral surface of the cylinder 22 on the opening end side of the cylinder 22 when the trigger 32 is at the initial position, that is, when the piston 23 is at the left stroke end in FIG. By providing such a support protrusion 51 integrally on the outer peripheral surface of the piston 23, even if a lateral force is applied to the trigger 32, the lateral load applied to the piston 23 at this time is supported by the support protrusion 51, That is, the lateral load can be supported by the cylinder 22 via the support protrusion 51, and the piston 23 can be prevented from tilting with respect to the cylinder 22. As a result, it is possible to prevent the seal piece 23b from being excessively deformed by applying a lateral load to the trigger 32 and causing liquid leakage from a portion between the cylinder 22 and the piston 23 of the pump 21.

  In the present embodiment, the rod-like protrusion 23d provided integrally with the axis of the piston 23 is disposed inside the partitioning cylinder 24 provided inside the cylinder 22, so that the cylinder 22 Thus, the tilt of the piston 23 can be prevented more reliably.

  Furthermore, a plurality of protrusions (guides) B that protrude radially outward from the outer peripheral surface of the auxiliary seal piece 23c on the outer peripheral surface of the piston 23 and come into contact with the inner peripheral surface of the cylinder 22 are arranged at equal intervals in the circumferential direction. It can also be provided side by side. By providing such a projection B, the lateral load applied to the piston 23 is also supported by the projection B, and the piston 23 can be further reliably prevented from tilting with respect to the cylinder 22.

  On the outer peripheral surface of the support protrusion 51, a large number of outside air introduction portions 51a formed in a rectangular groove shape are provided. An intake hole 35 for introducing air into the container 2 after the operation of the pump 21 is opened between the seal piece 23b and the support projection 51, and the trigger 21 is operated to cause the pump 21 to discharge, When the piston 23 moves to the right end in FIG. 2 to the stroke end, outside air is introduced into the intake hole 35 from the outside of the cylinder 22 through a large number of outside air introduction portions 51 a provided on the outer peripheral surface of the support protrusion 51. Thus, by providing the outside air introduction part 51 a on the outer peripheral surface of the support protrusion 51, even if the support protrusion 51 is provided on the opening side of the cylinder 22 relative to the seal piece 23 b on the outer peripheral surface of the piston 23, the outside air introduction part. Outside air can be introduced into the intake hole 35 through 51a. In FIG. 3, only a part of the outside air introduction part 51 a is shown for convenience, but the outside air introduction part 51 a is provided side by side at equal intervals over the entire circumference of the outer peripheral surface of the support protrusion 51.

  FIG. 4 is a cross-sectional view showing a modification of the support protrusion shown in FIG. As shown in FIG. 3, the support protrusion 51 is not limited to a configuration in which a large number of rectangular groove-shaped outside air introduction portions 51a are provided on the outer peripheral surface. For example, as shown in FIG. The configuration may be such that the shaped outside air introduction part 51a is provided symmetrically about its axis. In this modification, the number and size of the semicircular outside air introduction portions 51a can be set arbitrarily. In addition, the configuration is not limited to the semicircular outside air introduction portion 51a described above, and the outside air introduction portion 51a having another shape may be provided as long as the outside air can be passed toward the intake hole 35. You can also.

  As in the present embodiment, the seal piece 23b provided on the piston 23 is formed in the shape of an umbrella as described above, and the support protrusion 51 provided with the outside air introduction portion 51a is formed into a shape that can be cut off. The piston 23 integrally provided with 23b and the support protrusion 51 can be easily formed by injection molding using a mold or the like.

  As shown in FIG. 2, an auxiliary protrusion 52 is integrally provided on the outer peripheral surface of the cylindrical portion 23 a of the piston 23 so as to be located outside the support protrusion 51, that is, on the opening side of the cylinder 22. The auxiliary protrusion 52 is formed in a wall shape having a rectangular cross section that extends annularly along the circumferential direction on the outer peripheral surface of the cylindrical portion 23a of the piston 23 and protrudes radially outward from the outer peripheral surface of the cylindrical portion 23a. Yes. In the present embodiment, the auxiliary protrusion 52 is formed to have substantially the same outer diameter as the support protrusion 51, and when the piston 23 is pushed into the cylinder 22, its outer peripheral surface slides on the inner peripheral surface of the cylinder 22. It comes to touch. As a result, the lateral load applied to the piston 23 is also supported by the auxiliary protrusion 52, and the piston 23 can be more reliably prevented from tilting with respect to the cylinder 22.

  Note that the outer diameter of the auxiliary protrusion 52 may be slightly smaller than that of the support protrusion 51 so that a slight gap is provided between the outer peripheral surface of the auxiliary protrusion 52 and the inner peripheral surface of the cylinder 22.

  The trigger type liquid ejector 1 can be provided with a stopper 61 on the piston 23 in order to prevent the trigger 32 from being erroneously operated when not in use. For example, the stopper 61 made of resin has a stopper body 61a, a mounting piece 61b, and a knob 61c as shown in FIG.

  As shown in FIGS. 1 and 2, the stopper main body 61 a is formed in a C-shaped semi-cylindrical shape along the opening end of the cylinder 22, and is arranged between the trigger 32 and the opening end of the cylinder 22 to trigger the trigger 32. Movement toward the cylinder 22, that is, movement in the direction in which the piston 23 is pushed into the cylinder 22 is restricted. The stopper body 61a is not limited to the above-described shape, and may be various shapes as long as the stopper body 61a is disposed between the trigger 32 and the opening end of the cylinder 22 and can restrict the movement of the trigger 32 to the cylinder 22 side. Can do.

  The mounting piece 61b is a portion for supporting the stopper main body 61a on the piston 23, that is, a portion for mounting the stopper 61 on the piston 23, and an inner diameter dimension corresponding to the outer peripheral surface of the piston 23 in the slit portion between the support protrusion 51 and the auxiliary protrusion 52. And is integrally formed on one end side of the stopper main body 61a. The stopper 61 is detachably mounted on the piston 23 by being fitted into the outer peripheral surface of the piston 23 at the slit portion between the support protrusion 51 and the auxiliary protrusion 52 while elastically deforming the mounting piece 61b in the diameter increasing direction. be able to. At this time, since the mounting piece 61b is sandwiched between the support protrusion 51 and the auxiliary protrusion 52, the position of the stopper 61 relative to the piston 23 can be fixed, and the operation of the trigger 32 can be reliably regulated by the stopper body 61a.

  The knob portion 61c is a portion that is picked by a finger when the stopper 61 is attached to and detached from the piston 23, and is formed in a plate shape having an inverted T-shaped cross section that protrudes downward from the stopper body 61a. By picking this knob 61c by hand and pulling the stopper 61 downward, the mounting piece 61b can be detached from the piston 23 while being elastically deformed, and the stopper 61 can be easily detached from the piston 23.

  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, in the above-described embodiment, one support protrusion 51 is provided on the outer peripheral surface of the piston 23. However, the present invention is not limited to this, and a plurality of support protrusions 51 can also be provided. In particular, in the case of the configuration having the partition tube portion 24 as shown in the drawing, a plurality of support protrusions 51 can be provided between the seal piece 23 b and the open end of the partition tube portion 24.

  In the above-described embodiment, the pump 21 is configured such that the piston 23 is provided with the rod-shaped protrusion 23 d and the partitioning cylinder portion 24 in which the rod-shaped protrusion 23 d is disposed inside the cylinder 22. The rod-shaped protrusion 23d and the partition cylinder 24 may be omitted.

  Furthermore, the piston 23 may be configured such that the auxiliary seal piece 23c and the auxiliary protrusion 52 are not provided.

  Furthermore, the shape of the seal piece 23b is not limited to an umbrella shape that protrudes from the outer peripheral surface of the piston 23 toward the opposite side of the support protrusion 51, and may be various shapes. In this case, it is preferable that the shape of the seal piece 23b is a shape that can be divided in injection molding using a mold.

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 portion 23b Sealing piece 23c Auxiliary sealing piece 23d Rod-like projection 23e Connection piece 24 Partition cylinder part 24a Groove part 25 Suction hole 26 Ejection hole 31 Pivot 32 Trigger 32a Hole 33 Pin member 34 Leaf spring 35 Intake hole 36 Cover wall 36a Vent hole 41 Valve member 42 Fixing part 43 Suction side check valve 44 Discharge side check valve 45 Valve seat 51 Support projection 51a Outside air introduction part 52 Auxiliary protrusion 61 Stopper 61a Stopper body 61b Mounting piece 61c Knob P Channel C Cover B Projection

Claims (6)

An ejector body mounted on the mouth of a container for storing a liquid, a nozzle mounted at the tip of a flow path provided in the ejector body, and the inside of the container through the flow path operated by operation of a trigger A pump that pumps the liquid of the above to the nozzle, and a trigger type liquid ejector,
The pump is
A cylinder communicating with the flow path at one end;
A piston mounted on the inside of the cylinder so as to be movable in a direction along its central axis, and connected to the trigger at the tip;
An annular seal piece provided integrally with the outer peripheral surface of the piston, protruding from the outer peripheral surface and slidingly contacting the inner peripheral surface of the cylinder;
Wherein the seal piece provided integrally on the outer peripheral surface of the piston at the opening side of the cylinder, and protrudes from the outer peripheral surface have a, sliding contact with the support projections on the inner peripheral surface of the cylinder,
Trigger to the cylinder opening to the intake hole is provided between the support protrusions and the sealing piece, the the support protrusions, wherein that you have outside air introduction portion is provided for introducing outside air into the air inlet Type liquid ejector.   2. The trigger type liquid ejector according to claim 1, wherein the seal piece is formed in an umbrella shape that protrudes from the outer peripheral surface of the piston toward an opposite side to the support protrusion.   An umbrella-shaped auxiliary seal piece that protrudes in an inclined manner from the outer peripheral surface of the piston toward the side opposite to the support protrusion is provided integrally with the seal piece on the outer peripheral surface of the piston. The trigger type liquid ejector according to claim 2. The trigger type liquid ejector according to any one of claims 1 to 3 , wherein an auxiliary protrusion protruding from the outer peripheral surface is provided outside the support protrusion on the outer peripheral surface of the piston. A stopper body that is disposed between the trigger and the opening end of the cylinder and restricts the operation of the trigger, and is detachably mounted on the outer peripheral surface of the piston between the support protrusion and the auxiliary protrusion. The trigger type liquid ejector of Claim 4 provided with the stopper integrally formed with the character-shaped mounting piece. Provided coaxially partition tube portion inside the cylinder, according to any one of claim 1 to 5, the rod-like protrusion which is disposed inside the partition tube portion to the axis of the piston is provided integrally Trigger type liquid ejector.

Images