Trigger-type liquid ejector

Abstract

To provide a trigger type liquid spray that can restrict each center axis of a piston and a cylinder from inclining.SOLUTION: A trigger type liquid spray 1 comprises a spray body 10 that includes: a vertical supply cylinder part 20 that vertically extends; and a trigger mechanism 24 that has a trigger part 45 provided in a backward movable manner in a frontward energized condition on the front of the vertical supply cylinder part 20. The trigger mechanism 24 includes: a cylinder 51 that opens frontward; and a piston 52 that moves in the cross direction against the cylinder 51. The piston 52 has a regulating member 60 that is designed to move in the cross direction with the piston 52 and abuts on the cylinder 51 in the intersecting direction that intersects the cross direction, thereby restricting the movement of the piston 52 against the cylinder 51.SELECTED DRAWING: Figure 1

Description

[Technical field]

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

[0002] The trigger-type liquid ejector comprises a vertical supply tube section extending in the up and down direction, a cylinder connected to the vertical supply tube section, a piston that slides back and forth on the inner surface of the cylinder in response to the back and forth movement of the trigger section, and a nozzle member having an ejection hole (see, for example, Patent Document 1 below). According to this configuration, when the trigger part is pulled backward, the liquid contained in the cylinder flows through the vertical supply tube part toward the nozzle hole. This causes the liquid to be sprayed through the nozzle hole. Meanwhile, when the trigger part is released and the trigger part returns to its forward position, the liquid in the container body is sucked up into the vertical supply tube part. The liquid sucked up into the vertical supply tube part flows into the cylinder. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2011-177630 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, in conventional trigger-type liquid ejectors, when the trigger part is pulled backward, an external force may be applied to the trigger part in a direction intersecting the front-rear direction (e.g., left-right direction, etc.) depending on, for example, how the user's finger is gripped on the trigger part. Also, when a user purchases a product and takes it home, the trigger part may interfere with, for example, another product, and an external force in the left-right direction may be applied to the trigger part. In such cases, when the piston is pushed left-right via the trigger part, the central axis of the piston may tilt with respect to the central axis of the cylinder, making it difficult to maintain the seal between the piston and the cylinder.

[0005] The present invention provides a trigger-type liquid ejector capable of suppressing tilt of the central axes of the piston and cylinder. [Means for solving the problem]

[0006] In order to solve the above problems, the present invention employs the following aspects. A trigger-type liquid ejector according to one embodiment of the present invention comprises a ejector body attached to a container body that contains liquid, and a nozzle member attached to the front end of the ejector body and having an ejection hole formed therein for ejecting liquid forward, the ejector body comprising a vertical supply tube section extending in the vertical direction, and a trigger section provided in front of the vertical supply tube section and movable rearward in a forward biased state, the trigger section moving rearward to cause liquid to flow from within the vertical supply tube section toward the ejection hole by the rearward movement of the trigger section, the trigger mechanism comprising a cylinder that communicates with the interior of the vertical supply tube section and opens toward the front, and a piston that has a sliding section that can slide on the inner surface of the cylinder and moves in the front-to-rear direction relative to the cylinder as the trigger section moves in the front-to-rear direction, the piston being provided with a regulating member that is configured to be movable in the front-to-rear direction together with the piston, and that abuts against the cylinder in a cross direction that intersects the front-to-rear direction to regulate the movement of the piston in the cross direction relative to the cylinder.

[0007] According to this aspect, when the piston tries to fall in the intersecting direction, for example, when the trigger is pulled, the restricting member abuts against the cylinder in the intersecting direction, thereby restricting the piston from displacing in the intersecting direction relative to the cylinder. Therefore, the central axis of the piston can be prevented from tilting relative to the central axis of the cylinder due to an external force acting on the trigger in the intersecting direction. As a result, the sealing between the cylinder and the piston can be maintained. In this case, for example, compared to a case in which sealing between the cylinder and the piston is ensured by increasing the front-to-rear dimension of the sliding part, it is possible to ensure the piston stroke while preventing the pump part (cylinder and piston) from becoming larger. Furthermore, unlike the case where, for example, a configuration for restricting the movement of the trigger portion in the intersecting direction is provided on the cylinder side, by providing a restricting member directly on the piston, the displacement of the piston can be more effectively suppressed.

[0008] In the trigger-type liquid ejector of the above aspect, it is preferable that the regulating member is provided on a portion of the piston that is located forward of the sliding portion. According to this aspect, the displacement of the piston in the transverse direction via the trigger portion can be restricted by the restricting member before it is transmitted to the sliding portion, which makes it easier to maintain the sealing performance between the cylinder and the piston.

[0009] In the trigger type liquid ejector of the above aspect, it is preferable that the regulating member is located within the cylinder when the trigger portion is at the frontmost position. According to this aspect, the restricting member moves within the cylinder over the entire stroke range of the trigger from the frontmost position to the rearmost position, thereby restricting displacement of the piston in the intersecting direction relative to the cylinder over the entire stroke range of the trigger. In addition, even if the trigger portion moves only in the intersecting direction other than during a towing operation, such as when the trigger portion interferes with another product, the restricting member abuts against the cylinder in the intersecting direction, thereby restricting the piston from displacing in the intersecting direction relative to the cylinder. This makes it possible to prevent the central axis of the piston from tilting relative to the central axis of the cylinder, regardless of the position of the trigger portion, and maintains the sealing performance between the cylinder and the piston.

[0010] In the trigger type liquid ejector of the above aspect, it is preferable that the regulating member is formed of a material harder than the piston. According to this aspect, the rigidity of the restricting member can be increased, so that deformation of the restricting member when the restricting member is pressed against the inner circumferential surface of the cylinder via the trigger portion can be suppressed, and as a result, displacement of the piston in the intersecting direction relative to the cylinder can be more effectively suppressed.

[0011] In the trigger-type liquid ejector of the above-mentioned aspect, it is preferable that the regulating member has an opposing surface facing the inner surface of the cylinder in the intersecting direction, and that the opposing surface is provided with a protrusion portion protruding toward the inner surface of the cylinder in the intersecting direction. According to this aspect, the contact area between the regulating member and the inner circumferential surface of the cylinder can be reduced compared to when the opposing surface of the regulating member directly contacts the inner circumferential surface of the cylinder. This reduces the sliding resistance when the regulating member slides on the inner circumferential surface of the cylinder. As a result, it is possible to suppress the deterioration of operability due to the addition of the regulating member. Effect of the Invention

[0012] According to the aspects of the present invention, it is possible to suppress tilting of the central axes of the piston and the cylinder. [Brief description of the drawings]

[0013] [Figure 1] FIG. 1 is a vertical cross-sectional view of a trigger type liquid ejector according to a first embodiment. [Diagram 2] FIG. 4 is a rear view of the restricting member according to the first embodiment, as viewed from the front-rear direction. [Diagram 3] FIG. 2 is a vertical cross-sectional view corresponding to FIG. 1, illustrating the operation of the trigger-type liquid ejector. [Figure 4] FIG. 11 is a vertical cross-sectional view of a trigger type liquid ejector according to a second embodiment. [Diagram 5] FIG. 11 is a rear view of the restricting member according to the second embodiment, as viewed from the front-rear direction. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0014] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In the embodiments and modifications described below, the same reference numerals are used to designate corresponding configurations, and the description thereof may be omitted.

[0015] (First embodiment) 1, the trigger type liquid ejector 1 of this embodiment is capable of ejecting liquid contained in a container body A. The trigger type liquid ejector 1 includes a ejector body 10, a nozzle member 11, and a cover 13. Unless otherwise specified, each component part of the trigger type liquid ejector 1 is a molded product made of synthetic resin.

[0016] The ejector body 10 includes a vertical supply tube portion 20 , an attachment cap 21 , a pipe 22 , a trigger mechanism 24 having a pump portion 23 , an ejection tube portion 25 , a relay member 26 , and an upper plate member 27 .

[0017] Hereinafter, the direction along the axis O1 of the vertical supply tube section 20 (axial direction) is referred to as the up-down direction, and the bottom (not shown) side of the container body A along the up-down direction is referred to as the lower side, and the opposite side is referred to as the upper side. When viewed from the up-down direction, the direction intersecting the axis O1 is referred to as the radial direction. Within the radial direction, the direction in which the vertical supply tube section 20 and the nozzle member 11 are aligned is referred to as the front-rear direction. Within the front-rear direction, the nozzle member 11 side with respect to the vertical supply tube section 20 is referred to as the front side, and the opposite side is referred to as the rear side. Additionally, within the radial direction, the direction perpendicular to the front-rear direction when viewed from the up-down direction is referred to as the left-right direction.

[0018] The vertical supply tube section 20 sucks up the liquid in the container body A through the mouth section A1 of the container body A. The vertical supply tube section 20 is formed in a multi-stage tube shape with the diameter decreasing as it is positioned higher. Specifically, the vertical supply tube section 20 has a small diameter section 20a positioned at the top and a large diameter section 20c connected to the lower side of the small diameter section 20a via a step section 20b. In the illustrated example, the vertical supply tube section 20 has a double tube structure including an outer tube and an inner tube disposed inside the outer tube.

[0019] The large diameter portion 20c is provided with a flange portion 20d that protrudes radially outward. A ball valve 28 is provided in the vertical middle portion of the small diameter portion 20a. The ball valve 28 approaches and separates from the lower valve seat portion 20e protruding into the small diameter portion 20a from above. The ball valve 28 switches between communication and blocking between the inside of the container body A and the pump portion 23 through the vertical supply tube portion 20 in the small diameter portion 20a. Specifically, when the ball valve 28 is in a state where it is separated upward from the lower valve seat portion 20e, it allows the liquid to flow from the inside of the container body A to the pump portion 23 through the vertical supply tube portion 20. When the ball valve 28 is seated on the lower valve seat portion 20e, it restricts the flow of the liquid from the pump portion 23 to the inside of the container body A through the vertical supply tube portion 20. The ball valve 28 is formed of metal, synthetic resin, or the like.

[0020] A switching valve 29 is provided at the upper end of the small diameter portion 20a (a portion located above the ball valve 28). The switching valve 29 is integrally formed from an elastically deformable material such as rubber. The switching valve 29 is fitted into the small diameter portion 20a so as to be movable upward in a downwardly biased state. The switching valve 29 moves from above toward and away from an upper valve seat portion 20f protruding into the small diameter portion 20a. The switching valve 29 switches between communication and blocking between the pump portion 23 and the injection tube portion 25 through the vertical supply tube portion 20 in the small diameter portion 20a. Specifically, the switching valve 29 allows the flow of liquid from the pump portion 23 to the injection tube portion 25 through the vertical supply tube portion 20 when it is separated upward from the upper valve seat portion 20f. When the switching valve 29 is seated on the upper valve seat portion 20f, the switching valve 29 regulates the flow of liquid from the injection tube portion 25 to the pump portion 23 through the vertical supply tube portion 20.

[0021] The mounting cap 21 is formed in a cylindrical shape extending in the vertical direction. The mounting cap 21 is detachably fastened to the mouth portion A1 of the container body A with the flange portion 20d sandwiched between the mounting cap 21 and the upper end opening edge of the mouth portion A1. The mounting cap 21 and the mouth portion A1 may be fixed to each other by a method other than a screw (for example, fitting, etc.). In the illustrated example, the axis O1 of the vertical supply tube portion 20 is located rearward of the container axis of the container body A.

[0022] The pipe 22 is inserted into the vertical supply tube portion 20 through the inside of the large diameter portion 20c, and fitted into the small diameter portion 20a from below. When the trigger-type liquid ejector 1 is attached to the container body A, the pipe 22 extends downward inside the container body A.

[0023] The injection tube portion 25 guides the liquid in the vertical supply tube portion 20 toward the nozzle member 11. The injection tube portion 25 extends forward from a portion of the upper end portion of the vertical supply tube portion 20 that is located above the upper valve seat portion 20f. Relay member 26 connects between injection tube portion 25 and nozzle member 11. Relay member 26 is attached to injection tube portion 25 from the front.

[0024] Upper plate member 27 is attached to injection tube portion 25 so as to surround injection tube portion 25 and relay member 26 from above and laterally. Upper plate member 27 is formed in a downward U-shape when viewed from the front. Upper plate member 27 includes a connecting portion 40, an elastic member 41, and a bearing portion 42. The connecting portion 40 is provided along the front-rear direction above the injection tube portion 25 and the relay member 26. The connecting portion 40 connects the injection tube portion 25 and the relay member 26 to each other.

[0025] The elastic member 41 extends downward from both left and right edges at the front end of the connecting part 40. The elastic member 41 has a curved shape that protrudes forward and is configured to be elastically deformable in the front-rear direction with the boundary part (upper end) with the connecting part 40 as a starting point. The bearing portion 42 extends downward from both left and right edges at the rear end of the connecting portion 40. The bearing portion 42 has a curved shape that protrudes in the front-rear direction and is open toward the rear.

[0026] The trigger mechanism 24 includes a pump portion 23 and a trigger portion 45 . The pump section 23 stores and pumps the liquid in the container body A in response to a pulling operation (rearward pulling operation) of the trigger section 45. The pump section 23 includes a cylinder 51 and a piston 52. The cylinder 51 is provided in front of the small diameter portion 20a of the vertical supply tube portion 20. The cylinder 51 is formed in a bottomed tube shape that opens toward the front. Specifically, the cylinder 51 includes a cylinder tube 51a, a rear wall portion 51b, a piston guide 51c, and a communication tube 51d.

[0027] The cylinder 51a is formed in a cylindrical shape centered on a cylinder axis O2 along the front-rear direction. The cylinder 51a is fitted from the front into an attachment tube 55 extending forward from the vertical supply tube portion 20. The attachment tube 55 is disposed coaxially with the cylinder axis O2 and extends in the front-rear direction. In the following description, the direction intersecting the cylinder axis O2 as viewed from the front-rear direction may be referred to as the pump radial direction.

[0028] The rear wall portion 51b closes the rear end opening of the cylinder 51a. The piston guide 51c protrudes forward from a portion of the rear wall portion 51b that is located on the cylinder axis O2. The piston guide 51c is formed in a cylindrical shape with a top that is disposed coaxially with the cylinder axis O2. The communication tube 51d protrudes rearward from the outer circumferential portion of the rear wall portion 51b (a portion located above the piston guide 51c). The rear end portion of the communication tube 51d is inserted into a portion of the small diameter portion 20a located above the ball valve 28. The rear end opening portion of the communication tube 51d is open inside the vertical supply tube portion 20. That is, the inside of the cylinder 51 and the inside of the vertical supply tube portion 20 are in communication with each other through the communication tube 51d.

[0029] The piston 52 is provided in the cylinder 51 so as to be movable in the front-rear direction. The piston 52 includes a piston main body portion 52a, a piston flange 52b, and a sliding cylindrical portion (sliding portion) 52c. The piston body 52a is formed in a cylindrical shape with a top centered on a piston axis O3 along the front-rear direction. In this embodiment, the cylinder axis O2 and the piston axis O3 are arranged coaxially. A piston guide 51c is inserted into the piston body 52a from the rear. The piston body 52a is configured to be movable in the front-rear direction while being guided by the piston guide 51c.

[0030] The piston flange 52b protrudes outward in the radial direction of the pump from the rear end of the piston body 52a. The sliding cylindrical portion 52c is connected to the outer peripheral edge of the piston flange 52b. The sliding cylindrical portion 52c is formed in a cylindrical shape arranged coaxially with the piston axis O3. The sliding cylindrical portion 52c surrounds the piston main body portion 52a from the outside in the pump radial direction. The sliding cylindrical portion 52c is in close contact with the inner peripheral surface of the cylinder tube 51a at both ends in the front-rear direction. The sliding cylindrical portion 52c slides on the inner peripheral surface of the cylinder tube 51a as the piston 52 moves back and forth relative to the cylinder 51. The sliding cylindrical portion 52c may be in a plate shape or the like following the shape of the inner peripheral surface of the cylinder tube 51a.

[0031] The trigger portion 45 extends downward from the upper plate member 27. Specifically, the trigger portion 45 includes a trigger main body portion 45a, a vertical rib 45b, and a horizontal rib 45c. The trigger body 45a is formed in a C-shape that opens toward the rear in a cross-sectional view along the front-rear direction. The trigger body 45a extends while curving forward as it extends downward in front of the vertical supply tube portion 20. In this embodiment, the lower end of the trigger body 45a is located below the mounting cap 21 and in front of the nozzle member 11.

[0032] A pair of support pieces 45d protrude upward from the upper end of the trigger body 45a. The support pieces 45d are supported by the bearings 42 on both the left and right sides of the relay member 26. This allows the trigger 45 to rotate around an axis that extends in the left and right direction. A spring holding portion 45e is provided in the vertical middle portion of the trigger body 45a. The spring holding portion 45e protrudes from both sides in the left-right direction from the trigger body 45a. The spring holding portion 45e is connected to the elastic member 41 at a portion located below the bearing portion 42. As a result, the trigger portion 45 is configured to be movable backward in a forward biased state by the elastic member 41 while being rotatably supported by the bearing portion 42.

[0033] A front end of the piston body 52a is connected to a portion of the trigger body 45a that is located above the spring holding portion 45e. Therefore, the piston 52 moves rearward relative to the cylinder 51 as the trigger portion 45 moves rearward.

[0034] The vertical rib 45b protrudes rearward from the front wall of the trigger body 45a and extends in the up-down direction following the shape of the trigger body 45a. The horizontal rib 45c protrudes rearward from the front wall of the trigger body 45a. The horizontal rib 45c spans between both left and right side walls of the trigger body 45a while crossing the vertical rib 45b in the left and right direction. In the illustrated example, a plurality of the horizontal ribs 45c are provided at intervals in the up and down direction.

[0035] The nozzle member 11 is attached to the relay member 26 from the front. The nozzle member 11 is formed in a cylindrical shape with a bottom that opens to the rear. An ejection hole 11a extending in the front-rear direction is formed in the top wall portion (front wall portion) of the nozzle member 11. The ejection hole 11a communicates with the inside of the injection tube portion 25 through the inside of the nozzle member 11 and the relay member 26.

[0036] The cover 13 surrounds from above, behind and sides a portion of the ejector body 10 that is located above the mounting cap 21. The cover 13 is attached to the ejector body 10 by inserting the ejector body 10 toward the front.

[0037] Here, the piston 52 is provided with a regulating member 60 that is separate from the piston 52. The regulating member 60 is attached to the piston 52 and configured to be movable in the front-rear direction together with the piston 52. The regulating member 60 is integrally formed from a material (e.g., polypropylene, etc.) that is harder than the material constituting the piston 52.

[0038] As shown in FIGS. 1 and 2, the regulating member 60 includes a base tube 60a, a connecting ring 60b, a guide tube 60c, and a rib 60d. The base tube 60a is formed in a cylindrical shape and arranged coaxially with the piston axis O3 (cylinder axis O2). The piston main body 52a is fitted inside the base tube 60a. The front end edge of the base tube 60a is close to or in contact with the piston flange 52b from the front.

[0039] The connecting ring 60b projects radially outward from the front end opening edge of the base tube 60a, and the outer diameter of the connecting ring 60b is set to be equal to or smaller than the inner diameter of the cylinder 51a. The guide tube 60c extends rearward from the outer circumferential edge of the connecting ring 60b. The guide tube 60c is formed in a cylindrical shape arranged coaxially with the piston axis O3 (cylinder axis O2). The guide tube 60c surrounds the base tube 60a. The dimension of the guide tube 60c in the front-rear direction is shorter than the dimension of the base tube 60a in the front-rear direction. When the trigger portion 45 is at the front end position, the front end portion of the guide tube 60c enters the cylinder tube 51a and faces the inner circumferential surface of the cylinder tube 51a in the pump radial direction. In the illustrated example, the outer diameter of the guide tube 60c is larger than the outer diameter of the piston flange 52b and smaller than the maximum outer diameter portion of the sliding tube portion 52c.

[0040] The outer peripheral surface of the guide tube 60c constitutes an opposing surface facing the inner peripheral surface of the cylinder tube 51a in the pump radial direction. A protrusion 60f is formed on the outer peripheral surface (opposing surface) of the guide tube 60c. The protrusion 60f protrudes outward from the guide tube 60c in the pump radial direction and extends around the entire circumference around the piston axis O3. A plurality of protrusions 60f are formed at intervals in the front-rear direction. The protrusions 60f may be provided intermittently around the piston axis O3, or may extend along the front-rear direction.

[0041] In the pump radial direction, the tip of the protrusion 60f is located outside the piston flange 52b and is equal to or inside the maximum outer diameter part of the sliding tube part 52c. The restricting member 60 is configured to be able to slide on the inner circumferential surface of the cylinder tube 51a via the protrusion 60f when the piston 52 moves rearward. That is, the restricting member 60 restricts the movement of the piston 52 in the pump radial direction relative to the cylinder 51 by contacting the inner circumferential surface of the cylinder tube 51a via the protrusion 60f.

[0042] The rib 60d is formed in a plate shape extending radially from the piston axis O3. The rib 60d bridges between the base tube 60a and the guide tube 60c. In this embodiment, the front end edge of the rib 60d is connected to the connecting ring 60b.

[0043] Next, a case where the trigger-type liquid ejector 1 configured as described above is used will be described. It is assumed that by operating the trigger portion 45 multiple times, each portion of the trigger-type liquid ejector 1 is filled with liquid, and the liquid can be sucked up into the vertical supply tube portion 20.

[0044] First, as shown in FIG. 1 and FIG. 3, when the trigger portion 45 is pulled backward, the piston 52 moves backward with respect to the cylinder 51 together with the regulating member 60 against the biasing force of the elastic member 41. Then, the sliding tube portion 52c slides on the inner peripheral surface of the cylinder tube 51a, so that the inside of the cylinder 51 is pressurized. As a result, the liquid in the cylinder 51 is supplied into the vertical supply tube portion 20 (small diameter portion 20a) through the inside of the communication tube 51d. Then, the ball valve 28 is pressed toward the lower valve seat portion 20e by the pressure of the liquid supplied to the small diameter portion 20a, so that the communication between the inside of the container body A and the inside of the vertical supply tube portion 20 is blocked. As a result, the liquid in the small diameter portion 20a flows upward through the vertical supply tube portion 20.

[0045] As the liquid flows into small diameter portion 20a, the space within small diameter portion 20a that is surrounded by ball valve 28 and switching valve 29 is pressurized. As a result, switching valve 29 is pushed upward, and switching valve 29 moves away from upper valve seat 20f. As a result, small diameter portion 20a and injection tube portion 25 communicate with each other, and the liquid within small diameter portion 20a flows toward injection tube portion 25. The liquid flowing through injection tube portion 25 reaches nozzle member 11 through relay member 26 and is ejected through ejection hole 11a.

[0046] When the pulling operation of the trigger portion 45 is released, the trigger portion 45 moves forward due to the restoring force of the elastic member 41. Accordingly, the piston 52 moves forward with respect to the cylinder 51 together with the regulating member 60. This reduces the pressure inside the piston 52. This causes the ball valve 28 to float from the lower valve seat portion 20e, and the inside of the container body A communicates with the cylinder 51 through the small diameter portion 20a. On the other hand, the switching valve 29 maintains a state of being seated on the upper valve seat portion 20f, thereby blocking communication between the inside of the cylinder 51 and the inside of the injection tube portion 25 through the inside of the small diameter portion 20a. As a result, the liquid in the container body A is sucked up into the vertical supply tube portion 20. The liquid that has flowed into the vertical supply tube portion 20 is introduced into the cylinder 51 through the communication tube 51d, and can be prepared for the next ejection operation.

[0047] As described above, the restricting member 60 is configured to be movable in the front-rear direction integrally with the piston 52. Therefore, in the process in which the piston 52 moves in the front-rear direction inside the cylinder 51, the restricting member 60 also moves in the front-rear direction inside the cylinder 51. At this time, the restricting member 60 moves inside the cylinder 51 in a state in which it is in close proximity to or in contact with the inner circumferential surface of the cylinder barrel 51a via the protrusion 60f.

[0048] Here, for example, when the trigger portion 45 is pulled, if the load acting on the trigger portion 45 has a large component in a direction intersecting the front-rear direction (for example, the left-right direction), the piston 52 is pushed diagonally rearward, causing the piston 52 to fall in the pump radial direction. At this time, the restricting member 60 abuts against the inner circumferential surface of the cylinder tube 51a via the protrusion 60f, thereby restricting the piston 52 from being displaced in the pump radial direction relative to the cylinder 51.

[0049] In this manner, in the trigger-type liquid ejector 1 of the present embodiment, the piston 52 is provided with the restricting member 60 that is movable together with the piston 52 in the front-rear direction. According to this configuration, the restricting member 60 abuts against the inner circumferential surface of the cylinder 51a, thereby restricting the movement of the piston 52 relative to the cylinder 51 in a direction intersecting the front-rear direction (the pump radial direction). Therefore, it is possible to suppress the piston axis O3 from being tilted relative to the cylinder axis O2 by an external force in the pump radial direction acting on the trigger portion 45. As a result, it is possible to maintain the sealing performance between the cylinder 51 and the piston 52. In this case, for example, by increasing the front-to-rear dimension of the sliding cylindrical portion 52c, the stroke of the piston 52 can be ensured while preventing the pump portion 23 from becoming larger, compared to a case in which sealing between the cylinder 51 and the piston 52 is ensured. Furthermore, unlike the case where a configuration for restricting radial movement of the trigger portion 45 in the pump is provided on the cylinder 51 side, by providing the restricting member 60 directly on the piston 52, the displacement of the piston 52 can be more effectively suppressed.

[0050] In this embodiment, the restricting member 60 is provided on a portion of the piston main body 52a that is located on the trigger portion 45 side (forward) with respect to the sliding cylindrical portion 52c. According to this configuration, the displacement of the piston 52 in the pump radial direction via the trigger portion 45 can be restricted by the restricting member 60 before it is transmitted to the sliding cylindrical portion 52c. This makes it easier to maintain the sealing performance between the cylinder 51 and the piston 52.

[0051] In this embodiment, the restricting member 60 is configured to be located inside the cylinder 51 when the trigger portion 45 is at the front end position. According to this configuration, the regulating member 60 moves inside the cylinder 51 over the entire stroke range from the front end position to the rear end position of the trigger portion 45. This makes it possible to regulate the displacement of the piston 52 in the pump radial direction relative to the cylinder 51 over the entire stroke range of the trigger portion 45. Even if the trigger portion 45 moves only in the pump radial direction other than during a towing operation, such as when the trigger portion 45 interferes with another product, the restricting member 60 abuts against the cylinder 51 in the pump radial direction, thereby restricting the piston 52 from being displaced in the pump radial direction relative to the cylinder 51. As a result, regardless of the position of the trigger portion 45, it is possible to suppress the piston axis O3 from tilting with respect to the cylinder axis O2, and the sealing performance between the cylinder 51 and the piston 52 can be maintained.

[0052] In the present embodiment, the restricting member 60 is configured to be made of a material harder than the piston 52 . According to this configuration, the rigidity of the restricting member 60 can be increased, and therefore deformation of the restricting member 60 can be suppressed when the restricting member 60 is pressed against the inner circumferential surface of the cylinder 51a via the trigger portion 45. As a result, displacement of the piston 52 relative to the cylinder 51 in the pump radial direction can be more effectively suppressed.

[0053] In this embodiment, the guide tube 60c is configured to have a protrusion 60f that protrudes toward the inner circumferential surface of the cylinder 51a. According to this configuration, the contact area between the restricting member 60 and the inner peripheral surface of the cylinder 51a can be reduced compared to when the outer peripheral surface (opposing surface) of the guide tube 60c directly contacts the inner peripheral surface of the cylinder 51a. This reduces the sliding resistance when the restricting member 60 slides on the inner peripheral surface of the cylinder 51a. As a result, it is possible to suppress the deterioration of operability due to the addition of the restricting member 60.

[0054] In this embodiment, the restricting member 60 is configured to include a guide cylinder 60c that is disposed coaxially with the piston axis O3. According to this configuration, the guide tube 60c faces the entire inner circumferential surface of the cylinder 51a in the pump radial direction, so that the piston 52 can be stably supported.

[0055] Second embodiment This embodiment is different from the first embodiment described above in that the restricting member 60 does not include a connecting ring 60b or a guide tube 60c. In the trigger-type liquid ejector 1 shown in FIG. 4 and FIG.

[0056] The extension 101 is formed in a plate shape extending radially from the piston axis O3. When the trigger 45 is at the front end position, the front end of the extension 101 enters the cylinder 51a and faces the inner circumferential surface of the cylinder 51a in the pump radial direction. A plurality of protrusions 60f are provided on the outer circumferential surface (opposing surface) of each extension 101 at intervals in the front-rear direction. The regulating member 60 moves in the cylinder 51 together with the piston 52 in a state in which the regulating member 60 is in close proximity to or in contact with the inner circumferential surface of the cylinder 51a via the protrusions 60f.

[0057] In addition to providing the same advantageous effects as those of the first embodiment described above, the present embodiment provides the following advantageous effects. That is, according to this embodiment, the overhanging portion 101 contacts the inner peripheral surface of the cylinder tube 51a via the protrusion 60f, so that the contact area with the inner peripheral surface of the cylinder tube 51a can be reduced compared to a case where the surface of the regulating member 60 facing the inner peripheral surface of the cylinder tube 51a is formed in a cylindrical shape. This reduces the sliding resistance when the regulating member 60 slides on the inner peripheral surface of the cylinder tube 51a, and suppresses the deterioration of operability due to the addition of the regulating member 60.

[0058] Although the preferred embodiments of the present invention have been described above, the present invention is not limited to these embodiments. Addition, omission, substitution, and other modifications of the configuration are possible without departing from the spirit of the present invention. The present invention is not limited by the above description, but is limited only by the scope of the attached claims. In the above embodiment, the upper plate member 27 is provided with the elastic member 41 as a member for biasing the trigger portion 45 forward, but the present invention is not limited to this configuration. For example, a coil spring or the like may be provided between the cylinder 51 and the piston 52, and the trigger portion 45 may be biased forward via the piston 52. In the above embodiment, the restricting member 60 is formed separately from the piston 52, but the present invention is not limited to this configuration. The restricting member 60 may be formed integrally with the piston 52. In the above-described embodiment, the restricting member 60 is formed from a material harder than the piston 52. However, the present invention is not limited to this configuration. The restricting member 60 may be formed from the same material as the piston 52 or a material softer than the piston 52.

[0059] The regulating member 60 only needs to be able to regulate the radial movement of the piston 52 relative to the cylinder 51 by approaching or abutting the inner surface of the cylinder 51 when moving in the forward / backward direction at least together with the piston 52, and various configurations can be adopted, for example, as follows. In the above embodiment, a configuration has been described in which a part of the regulating member 60 is located inside the cylinder 51 when the trigger portion 45 is at the frontmost position, but the present invention is not limited to this configuration. The regulating member 60 only needs to be able to move inside the cylinder 51 in any section when the trigger portion 45 moves between the frontmost position and the rearmost position. In this case, when the trigger portion 45 is at the frontmost position, the entire regulating member 60 may be located outside the cylinder 51 or inside the cylinder 51. In the above-described embodiment, the restricting member 60 comes into contact with the cylinder 51 from the inside in the pump radial direction to restrict the displacement of the piston 52 relative to the cylinder 51, but the present invention is not limited to this configuration. The restricting member 60 may come into contact with the cylinder 51 from the outside in the pump radial direction. In the above embodiment, the restricting member 60 contacts the inner peripheral surface of the cylinder 51a via the protrusion 60f, but the present invention is not limited to this configuration. The restricting member 60 may be configured such that, for example, the guide tube 60c or the protruding portion 101 directly contacts the inner peripheral surface of the cylinder 51a.

[0060] In the above-described embodiment, the restricting member 60 is provided in a portion located forward of the sliding cylinder portion 52c, but the present invention is not limited to this configuration. The restricting member 60 may be provided in a portion located rearward of the sliding cylinder portion 52c. In the above-described embodiment, the cylinder axis O2 and the piston axis O3 are aligned with each other, but the present invention is not limited to this configuration. The cylinder axis O2 and the piston axis O3 may be arranged parallel to each other. In the above embodiment, the trigger portion 45 is configured to be rotatable, but the pattern is not limited to this checkered pattern. The trigger portion 45 may be configured to be slidable as long as it is configured to be movable in the front-rear direction.

[0061] In addition, within the scope of the invention, the components in the above-described embodiments may be replaced with well-known components, and the above-described modified examples may be combined as appropriate. [Explanation of symbols]

[0062] 1: Trigger-type liquid ejector 10: Squirt body 11: Nozzle material 11a:Blowout hole 20: Vertical supply tube 24: Trigger mechanism 45: Trigger section 51: Cylinder 52: Piston 52c: Sliding cylinder part (sliding part) 60: Regulatory member 60f:Protrusion A: Container body

Claims

1. An ejector body that is attached to a container body that contains a liquid; a nozzle member attached to a front end of the ejector body and having an ejection hole for ejecting liquid forward; The ejector body includes: A vertical supply tube portion extending in the vertical direction; a trigger mechanism including a trigger portion provided in front of the vertical supply tube portion and movable rearward in a forward biased state, the trigger portion moving rearward to cause liquid to flow from inside the vertical supply tube portion toward the nozzle hole side, The trigger mechanism includes: a cylinder communicating with the vertical supply tube portion and opening forward; a piston having a sliding portion that can slide on an inner circumferential surface of the cylinder and that moves in a front-rear direction relative to the cylinder in accordance with the front-rear movement of the trigger portion; A trigger-type liquid ejector in which the piston is configured to be movable in the forward / backward direction together with the piston, and is provided with a regulating member that abuts against the cylinder in a transverse direction that intersects the forward / backward direction, thereby regulating movement of the piston relative to the cylinder in the transverse direction.

2. 2. The trigger type liquid ejector according to claim 1, wherein the regulating member is provided on a portion of the piston that is located forward of the sliding portion.

3. 3. The trigger type liquid ejector according to claim 1, wherein the regulating member is located within the cylinder when the trigger portion is at the frontmost position.

4. 4. The trigger type liquid ejector according to claim 1, wherein the regulating member is made of a material harder than the piston.

5. the regulating member has an opposing surface facing an inner circumferential surface of the cylinder in the intersecting direction, 5. The trigger type liquid ejector according to claim 1, wherein the opposing surface is provided with a protrusion that protrudes toward an inner circumferential surface of the cylinder in the intersecting direction.

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