JP6667963B2 - Trigger type ejector - Google Patents

Description

  The present invention is an ejector body that is attached to the mouth of a container that contains liquid and has a liquid flow path, and a pump that is activated by operation of a trigger and sends out the liquid inside the container to the flow path, The present invention relates to a trigger type ejector having a nozzle head which is attached to an ejector main body in connection with an outlet of a flow path and ejects liquid sent to the flow path to the outside.

  In containers that contain liquids such as mold removers, detergents, clothing pastes, residential waxes, hairdressing agents, and fragrances, the inside of the container is a squirt attached to the mouth of the container by a pump that is activated by trigger operation. In many cases, a trigger-type ejector that ejects (ejects) a liquid stored in a container to the outside is used.

  As such a trigger-type ejector, for example, Patent Document 1 discloses an ejector main body that is attached to the mouth of a container that contains a liquid and that has a liquid flow path, and that is operated by a trigger to operate the container. A pump for sending the liquid inside to the flow path, a nozzle head connected to the outlet of the flow path and attached to the ejector body to eject the liquid sent to the flow path to the outside, A pressure accumulator plunger having a large-diameter pressure receiving portion abutting on a large-diameter cylindrical portion and a small-diameter pressure receiving portion abutting on a small-diameter cylindrical portion inside a pressure accumulating chamber defined between a main body portion and a nozzle head, A pressure-accumulation-type trigger-type ejector in which an urging member (spring) for urging a pressure accumulator plunger toward a closed position for closing an outflow hole is arranged is described. According to such a pressure accumulating type trigger type ejector, when the pressure of the liquid in the pressure accumulating chamber becomes a predetermined value or more, the pressure accumulating plunger is actuated by the difference in cross-sectional area between the large-diameter pressure receiving portion and the small-diameter pressure receiving portion. Is opened against the urging force of the liquid, so that the liquid can be ejected at a high pressure.

  Further, in such a trigger type ejector, the outer fitting wall on the nozzle head side is rotatably fitted and held in the inner fitting wall provided in the ejector main body, thereby forming the ejector main body. The nozzle head is rotatably mounted with respect to the nozzle head. Further, the nozzle head is configured to be rotatable within a predetermined range with respect to the ejector main body, and switches between a state in which liquid can be ejected and a state in which liquid cannot be ejected by rotating the nozzle. It is configured to be able to.

Japanese Patent No. 4767666

  By the way, in the above-mentioned conventional trigger type ejector, in order to prevent the nozzle head mounted on the ejector main body from easily falling off, an inner fitting wall provided on the ejector main body side is provided. There is a demand for further increasing the fitting strength between the outer fitting wall provided on the nozzle head side.

  As a method of increasing the fitting strength, for example, an undercut is applied between an outward claw provided on the outer peripheral surface of the inner fitting wall and an inward claw provided on the inner peripheral surface of the outer fitting wall. It is conceivable to increase the amount. However, when the distance between the outer peripheral surface of the inner fitting wall and the inner peripheral surface of the outer fitting wall is set close to increase the amount of engagement between the claws, the nozzle head is moved relative to the ejector main body. When rotating, the inner peripheral surface of the outer fitting wall may come into strong contact with the outer peripheral surface of the inner fitting wall or may be caught by each other, which may hinder the rotating operation. As a result, there is a problem that a large force is required for the rotation operation of the nozzle head.

  The present invention has been made in view of such a problem, and an object of the present invention is to increase a fitting holding force of a nozzle head with respect to an ejector main body, and to smoothly rotate a nozzle head with respect to an ejector main body. The object of the present invention is to provide a trigger type ejector capable of performing the above-mentioned.

The trigger type ejector of the present invention is mounted on an opening of a container for containing a liquid and has an ejector main body provided with a liquid flow path. A trigger type ejector comprising: a pump to be sent to a passage; and a nozzle head attached to the ejector main body in connection with an outlet of the flow passage to eject the liquid sent to the flow passage to the outside. hand,
The nozzle head has an outer fitting wall rotatably fitted and held on the inner fitting wall at a radially outer side of the cylindrical inner fitting wall in the ejector main body,
The outer fitting wall has a first inward claw engaged with an outward claw provided on an outer peripheral surface of the inner fitting wall, and the outer fitting wall has a different outer circumferential position from the first inward claw. A second inward claw engaged with the facing claw, and a lateral hole formed in a portion adjacent to the engagement surface of the second inward claw and penetrating the outer fitting wall;
A radial gap is formed between an inner peripheral surface of the outer fitting wall and an outer peripheral surface of the inner fitting wall at an opening edge circumferentially adjacent to the lateral hole. Features.

  In the trigger type ejector of the present invention, the inner peripheral surface of the outer fitting wall is pressed against the outer peripheral surface of the inner fitting wall in the circumferential region provided with the first inward claw portion. Is preferred.

  In the trigger type ejector according to the present invention, it is preferable that the first inward claws and the second inward claws are alternately arranged on the outer fitting wall along a circumferential direction.

In the trigger type ejector according to the present invention, the nozzle head includes:
A first nozzle body having the liquid outflow hole,
A second nozzle body fixed to the first nozzle body and defining a pressure accumulation chamber between the first nozzle body and a communication hole for communicating the pressure accumulation chamber with the flow path;
A large-diameter pressure-receiving portion and a small-diameter pressure-receiving portion facing the side opposite to the large-diameter pressure-receiving portion, between a closed position that is disposed inside the pressure accumulation chamber and closes the outflow hole and an open position that opens the outflow hole; A pressure accumulator plunger configured to be movable with
An urging member disposed in the accumulator and urging the accumulator plunger toward the closed position;
It is preferable that the outer fitting wall is provided on the second nozzle body.

The trigger type ejector according to the present invention, wherein the second nozzle body includes an inner cylinder wall having at least one rear groove portion surrounding the communication hole and communicating with an outlet of the flow path on an inner peripheral surface,
The ejector main body is disposed inside the inner cylinder wall so as to be rotatable and liquid-tight with respect to the inner cylinder wall, and at least one front groove communicating with the communication hole is provided on the outer peripheral surface. With a columnar part,
The nozzle head rotates with respect to the ejector main body portion between an ejection enabled position where the rear groove portion and the front groove portion communicate with each other and an injection disabled position where communication between the rear groove portion and the front groove portion is cut off. Preferably, it is movable.

  Advantageous Effects of Invention According to the present invention, it is possible to provide a trigger-type ejector capable of increasing the fitting holding force of the nozzle head to the ejector main body and allowing the nozzle head to smoothly rotate with respect to the ejector main body.

It is a sectional view in side view of a trigger type ejector which is one embodiment of the present invention. FIG. 2 is an enlarged sectional view of the trigger type ejector shown in FIG. 1. It is sectional drawing which follows the AA line of the outer fitting wall in the trigger type | mold ejector shown in FIG.

  Hereinafter, the configuration of the trigger type ejector 1 according to an embodiment of the present invention will be described in detail with reference to the drawings.

  In this specification, the claims and the abstract, the side where the shroud 44 is located with respect to the mounting cap 12 is defined as an upper side (upper side in FIG. 1), and the opposite side is defined as a lower side (lower side in FIG. 1). . The side where the trigger 41 is located with respect to the piston 35 of the pump 30 is defined as the front (left side in FIG. 1), and the opposite side is defined as the rear side (right side in FIG. 1).

  A trigger type ejector 1 according to an embodiment of the present invention shown in FIG. 1 is used by being attached to an opening 2a of a container 2 that stores a liquid as a content liquid. FIG. 1 shows this trigger type ejector 1 attached to the mouth 2 a of a container 2.

  The trigger type ejector 1 includes an ejector main body 10 attached to the mouth 2a. The ejector main body 10 can be made of, for example, a synthetic resin. A connection tube 11 is provided at a lower portion of the ejector main body 10, and a mounting cap 12 is mounted on the connection tube 11 so as to be rotatable relative to the connection tube 11. The mounting cap 12 is formed in a cylindrical shape having an inner diameter corresponding to the outer diameter of the mouth 2a, and is attached to the inner circumferential surface of the mounting cap 12 in a state where the connecting tube 11 is fitted to the inner circumferential surface of the mouth 2a. By screwing the provided female screw 12a to the male screw 2b provided on the outer peripheral surface of the mouth 2a, the ejector main body 10 can be fixed to the mouth 2a. Reference numeral 13 denotes a sealing member such as a packing for sealing between the mouth 2a and the connecting cylinder 11.

  The ejector main body 10 includes a tubular upright portion 14 and a tubular extending portion 15 extending in a direction orthogonal to the upright portion 14. An upright channel P1 reaching the connecting cylinder 11 is provided inside the upright portion 14, and a suction tube 16 inserted into the container 2 is connected to the upright channel P1. On the other hand, the extension section 15 is provided with an extension channel P2 extending in a direction orthogonal to the upright channel P1. A liquid flow path is formed inside the ejector main body 10 by the upright flow path P1 and the extended flow path P2.

  The ejector main body 10 includes a connecting member 24 fitted and held on the front end side of the extension 15. The connecting member 24 has a plate-like wall 17, and an outlet 18 of the extension flow path P <b> 2 is opened in the plate-like wall 17. The plate-shaped wall 17 is integrally formed with an inner fitting wall 19 which is formed in a cylindrical shape having a larger diameter than the outlet 18 and protrudes forward from the plate-shaped wall 17. A column 20 is provided inside the inner fitting wall 19 coaxially with the inner fitting wall 19. The columnar portion 20 is formed integrally with the inner fitting wall 19 via the plate-like wall 17. In addition, the plate-shaped wall 17, the inner fitting wall 19, and the columnar portion 20 constitute a connecting member 24 together with the holding cylinder 23 protruding rearward from the plate-shaped wall 17. In addition, the plate-like wall 17, the inner fitting wall 19, and the columnar part 20 may be configured to be integrally formed with the extension part 15. The holding cylinder 23 is fitted and held on the outer peripheral surface of the extension 15. The connecting member 24 is held so as not to rotate with respect to the extending portion 15.

  The plate-shaped wall 17 is provided with a through hole 17a, and the outlet 18 of the extension flow path P2 communicates with the opening end side of the inner fitting wall 19 via the through hole 17a. In addition, a front groove 21 extending rearward from the tip (front end) is provided on the outer peripheral surface of the columnar portion 20. The front groove portions 21 are open to the front and side of the columnar portion 20, and a total of two front groove portions 21 are provided so as to oppose the center axis of the columnar portion 20. These front grooves 21 communicate with communication holes 52f provided in a second nozzle body 52 described later. In the present embodiment, two front grooves 21 are provided on the outer peripheral surface of the columnar portion 20, but if at least one front groove 21 is provided, the number thereof can be changed as appropriate.

  An annular outward claw portion 22 protruding radially outward is integrally provided on the outer peripheral surface of the inner fitting wall 19 on the distal end side (front end side).

  As shown in FIG. 1, the trigger type ejector 1 includes a pump 30. The pump 30 includes a cylinder 33 having an inner cylinder 31 and an outer cylinder 32 and attached to the ejector main body 10. An outflow / inflow hole 34 is provided in the cylinder 33, and the inside of the cylinder 33 communicates with the upright flow path P1 and the extension flow path P2 via the inflow / outflow hole 34.

  A piston 35 is mounted between the inner cylinder 31 and the outer cylinder 32 so as to be movable in a direction along the central axis of the cylinder 33. The inner peripheral portion of the piston 35 slidably and liquid-tightly abuts the outer peripheral surface of the inner cylinder 31, and the outer peripheral portion of the piston 35 slidably and liquid-tightly abuts the inner peripheral surface of the outer cylinder 32.

  The outer cylinder 32 is provided with an intake hole 36 that is exposed to the outside when the piston 35 moves to the stroke end side by a pull operation of a trigger 41 described later. In addition, the ejector main body 10 is provided with a vent hole 37 for communicating the inside of the container 2 with the intake hole 36. Thus, when the pump 30 is operated to inject the liquid inside the container 2, the outside air is taken into the inside of the container 2 through the suction hole 36 and the ventilation hole 37, and the liquid inside the container 2 and the outside air Is to be replaced. The inner space of the piston 35 communicates with the inside of the container 2 through an opening 38 provided at the tip of the inner cylinder 31.

  A spherical check valve 40 is provided in the upright flow path P1. The check valve 40 allows the flow of the liquid from the inside of the container 2 to the outflow / inlet port 34, while allowing the liquid discharged from the outflow / inlet port 34 by the operation of the pump 30 to pass through the upright flow path P <b> 1. Act to prevent flow to the second side. The check valve 40 is not limited to a spherical one, but may be of various forms such as an umbrella-shaped one whose outer peripheral edge is in contact with the inner peripheral surface of the upright flow path P1 by an elastic body. it can.

  A trigger (operation lever) 41 is mounted on the ejector main body 10. The trigger 41 is pivotally supported on the ejector main body 10 by a pivot 42 at one end thereof. A pin member 43 is provided at an intermediate portion of the trigger 41, and the pin member 43 is engaged with a concave portion 35 a provided at a front end of the piston 35. Further, the distal end of a curved leaf spring S whose base end is fixed and held to the ejector main body 10 is locked to the trigger 41. The leaf spring S biases the trigger 41 in a direction away from the pump 30 (clockwise around the pivot 42 in FIG. 1).

  When the trigger 41 is pulled to rotate toward the pump 30, the hydraulic pressure inside the cylinder 33 is increased by the piston 35, and the check valve 40 is closed. Is sent out from the inflow / outflow hole 34 to the extension flow path P2. On the other hand, when the operation of the trigger 41 is released, the trigger 41 returns to the initial position by the elastic force of the leaf spring S, and the check valve 40 opens with the return operation, and the liquid inside the container 2 rises with the tube 16. It is sucked into the cylinder 33 from the inflow / outflow hole 34 via the flow path P1. By repeating the pulling operation and release of the trigger 41, the pump 30 is driven to suck the liquid inside the container 2 through the rising flow path P1 and to send the liquid to the outlet 18 through the extension flow path P2. can do.

  Note that the trigger 41 is not limited to the one that is swingably supported by the ejector main body 10, and may be configured to move linearly with the piston 35 as long as the piston 35 can be operated by a pulling operation.

  A shroud 44 that covers most of the ejector body 10 and the pump 30 is attached to the ejector body 10. The trigger 41 protrudes from below the shroud 44 and can swing without interfering with the shroud 44.

  A nozzle head 50 is mounted on an inner fitting wall 19 provided on the front end side of the extension portion 15 of the ejector main body 10 so as to communicate with the outlet 18 of the extension flow path P2. The nozzle head 50 includes a first nozzle body 51, a second nozzle body 52, a pressure accumulator plunger 53, a biasing member 54, and a nozzle tip 55, and is provided with an outlet through the upright channel P1 and the extended channel P2 by the pump 30. The liquid delivered to 18 is ejected (ejected) to the outside.

  As shown in FIG. 2, the first nozzle body 51 has a cylindrical outer shell wall 51a. Inside the outer shell wall 51a, a partition wall 51b that partitions the inner space of the outer shell wall 51a into a front side and a rear side is provided integrally, and a liquid outflow hole 51c is provided at the axis of the partition wall 51b. I have. The partition wall 51b is integrally provided with a large-diameter cylindrical portion 51d that protrudes rearward from the partition wall 51b. A fixed wall 51e that projects rearward from the partition wall 51b is integrally provided outside the large-diameter cylindrical portion 51d.

  The partition wall 51b is integrally provided with a protruding cylinder 56 projecting forward from the partition wall 51b and communicating with the outflow hole 51c. The nozzle tip 55 is fitted and fixed inside the protruding cylinder 56. I have. The nozzle tip 55 is provided with a small hole 55a having a smaller opening cross-sectional area than the outflow hole 51c at the front end thereof. The small hole 55a is provided at the front end of the spin element 57 disposed inside the protruding cylinder 56. It communicates with the outflow hole 51c via a passage provided between the spin groove 57a provided in the 55 and the side surface of the spin element 57. The liquid ejected from the outflow hole 51c passes through the small hole 55a of the nozzle tip 55 through the spin groove 57a, and is atomized by the nozzle tip 55 and ejected to the outside.

  In the present embodiment, the nozzle tip 55 is attached to the protruding cylinder 56, that is, the outflow hole 51c. However, the nozzle tip 55 may not be attached to the outflow hole 51c. In this case, a configuration in which the projecting cylinder 56 is not provided on the partition wall 51b may be adopted.

  The second nozzle body 52 includes a plate-shaped base 52a provided in front of the columnar portion 20 when the nozzle head 50 is mounted on the ejector main body 10. The base 52a is integrally provided with a cylindrical inner cylinder wall 52b extending rearward. The inner cylindrical wall 52b is disposed outside the columnar portion 20, and is rotatably and liquid-tightly in contact with the outer peripheral surface of the columnar portion 20 on its inner peripheral surface. Further, a small-diameter cylindrical portion 52c extending forward is integrally provided on the outer peripheral edge of the base portion 52a.

  On the front side of the small-diameter cylindrical portion 52c, a cylindrical fitting cylindrical portion 52d having a diameter larger than that of the small-diameter cylindrical portion 52c is provided integrally, and the fitting cylindrical portion 52d is formed by the large-diameter cylindrical portion of the first nozzle body 51. It is fitted outside 51d. Thus, a pressure accumulation chamber 58 is defined between the first nozzle body 51 and the second nozzle body 52. The fitting tube portion 52d is engaged with the inside of the fixed wall 51e undercut. Further, the fitting tubular portion 52d is circumferentially engaged with the fixed wall 51e so as not to rotate. Thus, the first nozzle body 51 and the second nozzle body 52 are fixed to each other, and the pressure accumulation chamber 58 is defined and formed between the first nozzle body 51 and the second nozzle body 52 fixed to each other. I have. The rear side portion of the fitting tube portion 52d is fitted inside the inside fitting wall 19 in a liquid-tight manner. The second nozzle body 52 has an annular flange portion 52e extending radially outward from the fitting tube portion 52d, and a cylindrical outer fitting wall 52g connected to the flange portion 52e. The outer fitting wall 52g is disposed radially outside the inner fitting wall 19, and is rotatably fitted to and held by the inner fitting wall 19.

  A plurality of communication holes 52f are provided in the base 52a of the second nozzle body 52. These communication holes 52f are surrounded by the inner cylinder wall 52b, and communicate the pressure accumulating chamber 58 with the outlet 18 of the extension flow path P2 via the inside of the inner cylinder wall 52b. A rear groove portion 59 is provided on the inner peripheral surface of the inner cylindrical wall 52b so as to extend from the rear end toward the front to a position overlapping the front groove portion 21 and communicate with the outlet 18 of the extension flow path P2. I have. The rear groove portion 59 is open to the rear and side of the inner cylinder wall 52b, and a total of two rear groove portions 59 are provided to face each other with the central axis of the inner cylinder wall 52b interposed therebetween. In the present embodiment, two rear grooves 59 are provided on the inner peripheral surface of the inner cylindrical wall 52b in accordance with the front grooves 21, but if at least one rear groove 59 is provided, the number thereof is The number can be appropriately changed to a number corresponding to the front groove 21.

  Here, FIG. 3 shows a cross-sectional view of the outer fitting wall 52g along the line AA shown in FIG. In FIG. 3, the outline of the inner peripheral surface of the inner fitting wall 19 and the outline of the outer peripheral edge of the outward claw portion 22 are indicated by two-dot chain lines. A first inward claw portion 61 and a second inward claw portion 62 protruding radially inward are provided on the inner peripheral surface of the outer fitting wall 52g. The first inward claws 61 and the second inward claws 62 engage with the outward claws 22 provided on the inner fitting wall 19 at different circumferential positions. The first inward claw portions 61 are evenly arranged at four locations at intervals in the circumferential direction of the outer fitting wall 52g, and are disposed between two circumferentially adjacent first inward claw portions 61g. 2 Inward claws 62 are arranged. That is, in the present embodiment, the first inward claws 61 and the second inward claws 62 are alternately arranged along the circumferential direction of the outer fitting wall 52g. A lateral hole 63 penetrating the outer fitting wall 52g is formed in a portion of the outer fitting wall 52g adjacent to the engagement surface of the second inward claw portion 62. Specifically, the horizontal hole 63 is provided at a position adjacent to one side (front side) of the outer fitting wall 52g in the axial direction with respect to the engagement surface of the second inward claw portion 62. The horizontal holes 63 are arranged at circumferential positions corresponding to the four second inwardly extending claws 62, respectively. In a state where the outer fitting wall 52g is fitted to the inner fitting wall 19, the hook amount of the second inward claw portion 62 to the outward claw portion 22 is larger than that of the first inward claw portion 61. It is configured as follows. That is, the amount of protrusion of the outer fitting wall 52g from the inner peripheral surface is greater in the second inward claw 62 than in the first inward claw 61.

  When forming the second nozzle body 52 by injection molding, the first inwardly-facing claws 61 can be formed by so-called “forced removal”. That is, when the second nozzle body 52 is molded inside the clamped mold using a mold having an undercut shape (recess) corresponding to the first inward claw portion 61, and then removed from the mold. In this case, the first inward claws 61 can overcome the undercut shape of the mold by elastically deforming radially outward.

  When forming the second nozzle body 52 by injection molding, the second inward claws 62 can be formed by so-called “lateral punching”. In this case, for example, a mold slide core that can be moved substantially perpendicularly to the dividing direction of the split mold divided into two is used. That is, after forming the second nozzle body 52 inside the mold clamped in a state where the slide core is arranged at a position corresponding to the horizontal hole 63, when removing the slide core from the mold, the slide core is placed in the radial direction. After being moved outward and extracted from the lateral hole 63, the second nozzle body 52 is removed from the split mold. By doing so, the second inward claw portion 62 in which the amount of protrusion of the outer fitting wall 52g from the inner peripheral surface is large can be formed without involving unauthorized deformation.

  As shown in FIG. 3, at the opening edges 64 on both sides adjacent to the horizontal hole 63 in the circumferential direction, between the inner peripheral surface of the outer fitting wall 52 g and the outer peripheral surface of the inner fitting wall 19, A radial gap 65 is provided. In the present embodiment, the inner peripheral surface of the outer fitting wall 52g in the circumferential region where the opening edge 64 and the second inward claws 62 are provided is in the circumferential region where the first inward claws 61 are provided. It is located radially outward of the inner peripheral surface of the outer fitting wall 52g. That is, a large-diameter portion that is concave toward the outside in the radial direction is formed on the inner peripheral surface of the outer fitting wall 52g in the circumferential region of the opening edge portion 64 and the second inward claw portion 62.

  As described above, in the trigger type ejector 1 of the present embodiment, the gap 65 is provided between the opening edge 64 and the outer peripheral surface of the inner fitting wall 19, so that the ejector main body 10 is provided. When rotating the nozzle head 50, the opening edge 64 is not caught on the outer peripheral surface of the inner fitting wall 19, so that the nozzle head 50 can be smoothly rotated.

  In the present embodiment, the inner peripheral surface of the outer fitting wall 52g is pressed against the outer peripheral surface of the inner fitting wall 19 in the circumferential region where the first inward claws 61 are provided. Have been. More specifically, in a region adjacent to the front side of the first inward claw portion 61, the inner peripheral surface of the outer fitting wall 52 g is positioned radially outside of the outward claw portion 22 provided on the inner fitting wall 19. It is pressed against the end. In the portion pressed in this way, the diameter of the inner peripheral surface of the outer fitting wall 52g is set smaller than the diameter of the outer peripheral surface of the inner fitting wall 19. Thereby, in the trigger type ejector 1 of the present embodiment, the amount of the first inward claw portion 61 to be hooked to the outward claw portion 22 is secured, so that the fitting strength can be increased. Further, as indicated by the arrow in FIG. 3, a radially outward force acts on the outer fitting wall 52 g in a circumferential region pressed against the outer peripheral surface of the inner fitting wall 19. As a result, the circumferential region that does not contact the outer peripheral surface of the inner fitting wall 19, that is, the circumferential region in which the radial gap 65 is provided, is pulled from both sides, and a radially inward force acts. . As a result, the second inward claws 62 are displaced radially inward, so that the amount of engagement of the second inward claws 62 with respect to the outward claws 22 increases, and the outer fitting wall with respect to the inner fitting wall 19. The fitting strength of 52 g can be further increased.

  The nozzle head 50 is rotatable with respect to the ejector main body 10. Further, the nozzle head 50 is configured such that the first inward claw 61 and the second inward claw 62 of the second nozzle body 52 engage with the outward claw 22 of the ejector main body 10, thereby causing the ejector It is retained from the main body 10. Thus, the nozzle head 50 is mounted on the ejector main body 10 at the second nozzle body 52.

  A rib-like projection 51f is provided inside the outer shell wall 51a of the first nozzle body 51, and comes into contact with a projection 17b projecting from the plate-like wall 17 when the nozzle head 50 is rotated. Click feeling can be obtained.

  When the nozzle head 50 is at a stroke end position in one rotation direction, that is, a jettable position, the rear groove portion 59 provided on the inner cylindrical wall 52b communicates with the front groove portion 21 provided on the columnar portion 20, and the rear groove portion 59 is formed. The extension flow path P2 is communicated with the communication hole 52f, that is, the pressure accumulating chamber 58 via the front groove 21 and the front groove 21. That is, by setting the nozzle head 50 at the position where the liquid can be ejected, the trigger type ejector 1 can be set in a state where the liquid can be ejected. On the other hand, when the nozzle head 50 is at the stroke end position in the other rotational direction, that is, at the ejection impossible position, the communication between the rear groove portion 59 and the front groove portion 21 is cut off, and the extending flow path P2 is connected to the communication hole 52f, that is, the pressure accumulation chamber 58. Communication is interrupted. That is, by setting the nozzle head 50 to the ejection disabled position, the trigger type ejector 1 can be set in a state in which the liquid cannot be ejected.

  As shown in FIG. 2, the pressure accumulation plunger 53 is arranged inside the pressure accumulation chamber 58. A pressure storage plunger 53, a guide cylinder 53a slidably and liquid-tightly contacting the inner peripheral surface of the small-diameter cylindrical part 52c, a disc-shaped main body 53b connected to a front end of the guide cylinder 53a, and a main body. A large-diameter pressure receiving portion 53c that extends forward from 53b and is slidable and liquid-tightly abuts on the inner peripheral surface of the large-diameter cylindrical portion 51d. A substantially disc-shaped valve body 53e integrally connected to the large-diameter pressure receiving portion 53c by a plurality of legs 53d arranged at intervals in the circumferential direction is provided on the radially inner side of the large-diameter pressure receiving portion 53c. The valve body 53e constitutes a small-diameter pressure receiving portion facing the side opposite to the large-diameter pressure receiving portion 53c.

  The pressure accumulating plunger 53 moves inside the pressure accumulating chamber 58 in a closed position (a front stroke end position) in which the valve body 53e contacts the outflow hole 51c to close the outflow hole 51c, and moves rearward from the closed position. It is movable between an open position (a rear stroke end position) where the outflow hole 51c is opened.

  The urging member 54 is disposed inside the accumulator 58 and urges the accumulator plunger 53 toward the closed position, that is, toward the front side. More specifically, the urging member 54 is formed of a coil spring, one end of which is supported by a rod-shaped portion 60 provided integrally with the base 52a, and the other end of which is in contact with the valve body 53e to accumulate the plunger 53. To the closing position. In the present embodiment, a coil spring is used as the biasing member 54, but various types can be applied as long as the biasing force toward the closed position can be applied to the pressure accumulating plunger 53.

  When the trigger 41 is operated when the nozzle head 50 is at the ejectable position and the liquid inside the container 2 is sent out to the rising flow path P1 and the extension flow path P2 by the pump 30, the liquid flowing out of the outlet 18 is discharged. The pressure is introduced into the accumulator 58 from the communication hole 52f. When the liquid is introduced into the pressure accumulating chamber 58, the large-diameter pressure receiving portion 53c of the pressure accumulating plunger 53 and the valve body 53e as the small-diameter pressure receiving portion receive the pressure of the liquid, and the large-diameter pressure receiving portion 53c and the small-diameter pressure receiving portion (valve). A force toward the rear (a force from the closed position to the open position) is generated in the pressure accumulating plunger 53 in accordance with the difference in cross-sectional area between the pressure accumulating plunger 53 and the body portion 53e. When the pressure of the liquid inside the pressure accumulating chamber 58 becomes equal to or more than a predetermined value, the rearward pressure generated in the pressure accumulating plunger 53 according to the difference between the cross-sectional area of the large-diameter pressure receiving portion 53c and the cross-sectional area of the valve body 53e that is the small-diameter pressure receiving portion. Is greater than the urging force of the urging member 54, the pressure accumulating plunger 53 moves from the closed position to the open position against the urging force of the urging member 54, and the outlet hole 51c is opened. That is, when the pressure of the liquid in the accumulator 58 becomes equal to or higher than the predetermined value, the accumulator plunger 53 moves to the open position, and the outlet hole 51c is opened. As a result, the liquid, which has been raised to a predetermined pressure, is ejected from the outlet 51c, and the liquid ejected from the outlet 51c is atomized by the nozzle tip 55 and ejected to the outside.

  On the other hand, if the nozzle head 50 is rotated by 90 degrees from the ejectable position to the ejectable position, the space between the outlet 18 of the extended flow path P2 and the communication hole 52f can be shut off. Therefore, with a simple operation of simply rotating the nozzle head 50 from the ejection-possible position to the ejection-disabling position, it is possible to prevent the liquid from being accidentally ejected due to the sudden operation of the trigger 41. Further, when not in use, unlike the case where the outflow hole 51c is closed with a lid or the like, there is no need to operate a member to which liquid may adhere, so that the trigger type ejector 1 is set to a state in which liquid cannot be ejected. In this case, it is possible to prevent the liquid from adhering to a finger or the like.

  In the nozzle head 50 having such a configuration, the first nozzle body 51 and the second nozzle body 52 are assembled and fixed to each other such that the pressure accumulation plunger 53 and the urging member 54 are sandwiched therebetween. The pressure accumulating plunger 53 and the urging member 54 can be configured as a single unit in a pressure accumulating chamber 58 defined between the first nozzle body 51 and the second nozzle body 52. When the nozzle head 50 has a configuration in which the nozzle tip 55 is attached to the tip, the nozzle head 50 can be formed as one unit including the nozzle tip 55. Therefore, the nozzle head 50 can be unitized (moduleed) in advance in a step different from the assembling step of assembling the pump 30 to the ejector body 10. The nozzle head 50 thus unitized fits the inner cylindrical wall 52b of the second nozzle body 52 with the columnar portion 20 provided on the ejector main body 10, and also fixes the outer fitting wall 52g to the inner side. The ejector body 10 is pushed toward the ejector main body 10 so as to be fitted to the fitting wall 19, and the first inward claws 61 and the second inward claws 62 are engaged with the outward claws 22. It can be easily assembled to the part 10.

  The present invention is not limited to the above embodiment, and it goes without saying that various modifications can be made within the scope of the claims.

  For example, in the above-described embodiment, the cylinder 33 constituting the pump 30 is provided separately from the ejector main body 10, but may be provided integrally with the ejector main body 10. Further, the configuration itself of the pump 30 can be variously changed.

Reference Signs List 1 trigger type ejector 2 container 2a mouth 2b male screw 10 ejector main body 11 connecting tube 12 mounting cap 12a female screw 13 seal member 14 upright portion 15 extension portion 16 tube 17 plate-shaped wall 17a through hole 17b convex portion 18 outlet 19 Inner fitting wall 20 Column 21 Front groove 22 Outward claw 23 Holding tube 24 Connecting member 30 Pump 31 Inner tube 32 Outer tube 33 Cylinder 34 Outflow / inlet 35 Piston 35a Recess 36 Intake 37 Vent 38 Open 40 Reverse Stop valve 41 Trigger 42 Axis 43 Pin member 44 Shroud 50 Nozzle head 51 First nozzle body 51a Outer shell wall 51b Partition wall 51c Outflow hole 51d Large diameter cylindrical portion 51e Fixed wall 51f Projection piece 52 Second nozzle body 52a Base 52b Inner cylinder wall 52c Small diameter cylindrical part 52d Fitting cylindrical part 52e Flange part 52f Communication hole 52g Outer fitting wall 3 accumulator plunger 53a guide tube portion 53b body portion 53c larger 径受 pressure portion 53d leg 53e valve body (diameter pressure receiving portion)
54 urging member 55 nozzle tip 55a small hole 56 projecting cylinder 57 spin element 57a spin groove 58 pressure accumulating chamber 59 rear groove 60 rod-shaped portion 61 first inward claw 62 second inward claw 63 side hole 64 opening edge 65 Clearance P1 Standing flow path P2 Extension flow path S Leaf spring

Claims (5)

An ejector main body that is attached to the mouth of the container that contains the liquid and that has a liquid flow path; a pump that is operated by operation of a trigger to deliver the liquid inside the container to the flow path; A nozzle head attached to the ejector body in connection with the outlet of the path to eject the liquid sent out to the flow path to the outside, and a trigger-type ejector comprising:
The nozzle head has an outer fitting wall rotatably fitted and held on the inner fitting wall at a radially outer side of the cylindrical inner fitting wall in the ejector main body,
The outer fitting wall has a first inward claw engaged with an outward claw provided on an outer peripheral surface of the inner fitting wall, and the outer fitting wall has a different outer circumferential position from the first inward claw. A second inward claw engaged with the facing claw, and a lateral hole formed in a portion adjacent to the engagement surface of the second inward claw and penetrating the outer fitting wall;
A radial gap is formed between an inner peripheral surface of the outer fitting wall and an outer peripheral surface of the inner fitting wall at an opening edge circumferentially adjacent to the lateral hole. Features trigger type ejector.   The trigger type according to claim 1, wherein an inner peripheral surface of the outer fitting wall is pressed against an outer peripheral surface of the inner fitting wall in a circumferential region provided with the first inward claw portion. Spouter.   The trigger type ejector according to claim 1, wherein the first inward claws and the second inward claws are alternately arranged on the outer fitting wall along a circumferential direction. The nozzle head includes:
A first nozzle body having the liquid outflow hole,
A second nozzle body fixed to the first nozzle body and defining a pressure accumulation chamber between the first nozzle body and a communication hole for communicating the pressure accumulation chamber with the flow path;
A large-diameter pressure-receiving portion and a small-diameter pressure-receiving portion facing the side opposite to the large-diameter pressure-receiving portion, between a closed position that is disposed inside the pressure accumulation chamber and closes the outflow hole and an open position that opens the outflow hole; A pressure accumulator plunger configured to be movable with
An urging member disposed in the accumulator and urging the accumulator plunger toward the closed position;
The trigger type ejector according to claim 1, wherein the outer fitting wall is provided on the second nozzle body. The second nozzle body includes an inner cylindrical wall surrounding the communication hole and having at least one rear groove communicating with an outlet of the flow path on an inner peripheral surface,
The ejector main body is disposed inside the inner cylinder wall so as to be rotatable and liquid-tight with respect to the inner cylinder wall, and at least one front groove communicating with the communication hole is provided on the outer peripheral surface. With a columnar part,
The nozzle head rotates with respect to the ejector main body portion between an ejection enabled position where the rear groove portion and the front groove portion communicate with each other and an injection disabled position where communication between the rear groove portion and the front groove portion is cut off. The trigger type ejector according to claim 4, which is movable.

Images