Triggered liquid jet

Abstract

The present application provides a trigger type liquid sprayer (1, 201) with a sprayer body (2, 202) mounted on a container body (A, 200A), a nozzle member (4, 203) formed with a spray hole (3, 204), and a right-inversion adapter (7, 250). The sprayer body (2, 202) is provided with a longitudinal supply cylinder portion (10, 210), a trigger mechanism (16, 230) with a trigger portion (40, 231), an accumulation cylinder (31, 280), and an accumulation plunger (32, 300). The right-inversion adapter (7, 250) is provided with an adapter body (8, 253) forming a first space (127, S3) for communication between the container body (A, 200A) and the longitudinal supply cylinder portion (10, 210) through a right-standing guide inlet (131a, 251), a second space (125, S4) for communication between the container body (A, 200A) and the first space (127, S3) through an inverted guide inlet (118, 252), and a switching valve (126, 254) for cutting off the communication between the first space (127, S3) and the second space (125, S4) when the container body (A, 200A) is right-standing and for making the first space (127, S3) and the second space (125, S4) communicate when the container body (A, 200A) is inverted.

Description

Technical Field

[0001] This invention relates to a trigger-type liquid injector. This application claims priority based on Japanese Patent Application No. 2022-029561 filed in Japan on February 28, 2022, and Japanese Patent Application No. 2021-141394 filed in Japan on August 31, 2021, the contents of which are incorporated herein by reference. Background Technology

[0002] As a trigger-type liquid ejector, a structure is disclosed that includes a main pump section for accumulating liquid and a trigger section for actuating the main pump section. According to this structure, if the trigger section is pulled backward, the cylinder of the main pump section is pressurized, causing the liquid in the cylinder to flow toward the injection hole. Thus, the liquid is ejected through the injection hole. Conversely, during the forward reset of the trigger section, the cylinder is depressurized, causing the liquid in the container to flow back into the cylinder.

[0003] For example, Patent Document 1 discloses a trigger-type liquid ejector that includes a accumulator pump section in addition to a main pump section. In this trigger-type liquid ejector, with the operation of the trigger section, a portion of the liquid delivered from the main pump section is ejected through the ejection orifice, while another portion of the liquid is accumulated in the cylinder of the accumulator pump section. Therefore, when the operation of the trigger section is stopped, the liquid accumulated in the cylinder of the accumulator pump section flows toward the ejection orifice. Thus, liquid can be continuously ejected even when the trigger section is not operated.

[0004] Furthermore, trigger-type liquid ejectors are known to draw liquid from a container and eject it through a spray hole by operating a trigger. As such a trigger-type liquid ejector, for example, as shown in Patent Document 2 below, a trigger-type liquid ejector is known to have an ejector body and a nozzle component, wherein the ejector body is mounted on a container containing liquid, and the nozzle component forms a spray hole for ejecting liquid.

[0005] The injector body includes an accumulator cylinder with an inner and an outer cylinder. The accumulator cylinder is arranged longitudinally along the container axis, inside the mounting cap installed at the opening of the container body. The inner side of the inner cylinder functions as a connecting passage connecting the longitudinal flow path to the pipe. The annular space between the inner and outer cylinders is connected to the longitudinal flow path via a connecting passage. Within the annular space, an annular piston is arranged to move vertically while applying upward force.

[0006] In the aforementioned trigger-type liquid ejector, by operating the trigger, a portion of the liquid ejected from the injection orifice is guided from the longitudinal flow path through the connecting path into the annular space, and is stored in the accumulator cylinder while the annular piston is pressed. Therefore, even after operating the trigger, the upward force of the annular piston can be used to eject the liquid stored in the accumulator cylinder from the injection orifice. This enables continuous liquid injection.

[0007] Existing technical documents

[0008] Patent documents

[0009] Patent Document 1: Japanese Patent Application Publication No. 2017-213497

[0010] Patent Document 2: Japanese Patent Application Publication No. 2014-148330 Summary of the Invention

[0011] Technical issues

[0012] However, in the trigger-type liquid ejector capable of continuous spraying disclosed in Patent Document 1, it is sometimes required that the liquid spraying action be performed in both the upright and inverted positions of the container body.

[0013] Furthermore, in the trigger-type liquid ejector disclosed in Patent Document 2, liquid ejection is sometimes required both when the container is upright and when it is inverted. Therefore, as a trigger-type liquid ejector to address this need, a trigger-type liquid ejector with an upright / inverted adapter provided inside the mounting cover is known. The upright / inverted adapter is an adapter that allows liquid ejection from the container in either the upright or inverted position.

[0014] In the trigger-type liquid ejector capable of continuous spraying described in Patent Document 2, when spraying liquid in both upright and inverted positions, an adapter for upright / inverted operation needs to be installed inside the mounting cover in addition to the accumulator cylinder. However, with both the accumulator cylinder and the adapter installed, a large radial space is required, making the diameter of the mounting cover tend to be large. This results in a larger overall size of the trigger-type liquid ejector, and, for example, reduces operability when operating the trigger while holding the container.

[0015] The present invention was made in view of the following circumstances, and its object is to provide a trigger-type liquid injector capable of continuous spraying in both upright and inverted positions, and also to provide a trigger-type liquid injector capable of suppressing the tendency of the diameter of the mounting cap to become too large and capable of continuous spraying in both upright and inverted positions.

[0016] Technical solution

[0017] To solve the above problems, the present invention employs the following method. A first aspect of the present invention comprises: an injector body mounted on a container holding liquid; a nozzle component disposed in front of the injector body and having a spray hole for spraying liquid forward; and an adapter for upright and inverted operation mounted on the lower end of the injector body. Furthermore, the injector body comprises: a longitudinal supply cylinder extending in a vertical direction for supplying liquid drawn from the container; a trigger mechanism having a trigger portion disposed in front of the longitudinal supply cylinder such that it can move rearward under forward force, the trigger mechanism causing liquid to flow toward the spray hole by moving the trigger portion rearward; a accumulator cylinder extending in a longitudinal direction, and supplying liquid inward by moving the trigger portion rearward; and an accumulator plunger configured to move rearward within the accumulator cylinder under forward force as liquid is supplied into the accumulator cylinder, causing liquid in the accumulator cylinder to flow toward the spray hole. The adapter for upright and inverted operation includes: an adapter body forming a first space connecting the container body and the longitudinal supply cylinder via an upright inlet, and a second space connecting the container body and the first space via an inverted inlet; and a switching valve that, when the injector body is installed on the container body, cuts off the connection between the first space and the second space when the container body is upright, and connects the first space and the second space when the container body is inverted.

[0018] According to this trigger-type liquid injector, a portion of the liquid flowing into the accumulator can be ejected through the injection port, and a portion of the liquid can be accumulated in the accumulator. Therefore, even without operating the trigger, the liquid accumulated in the accumulator can be ejected by the forward force acting on the accumulator plunger. Furthermore, the trigger-type liquid injector of this embodiment, having an adapter for upright and inverted positions, can eject liquid in either the upright or inverted position. As a result, continuous liquid injection can be performed in both the upright and inverted positions.

[0019] In particular, according to this method, by extending the accumulator cylinder (and accumulator plunger) in the front-to-back direction, it is easy to ensure the volume of the accumulator cylinder while suppressing the tendency of the trigger-type liquid injector to become larger in the vertical direction.

[0020] In the second embodiment of the invention, based on the trigger-type liquid injector of the first embodiment, the accumulator cylinder and the accumulator plunger are disposed above the longitudinal supply cylinder and between the longitudinal supply cylinder and the nozzle component. According to this embodiment of the trigger-type liquid injector, the design of the accumulator cylinder and accumulator pump is less susceptible to interference with other structural components of the trigger-type liquid injector. Therefore, the design freedom of the accumulator cylinder and accumulator plunger is increased, and the volume of the accumulator cylinder is easily ensured.

[0021] In a third embodiment of the present invention, based on the trigger-type liquid injector of the first or second embodiment described above, the longitudinal supply cylinder includes: a first opposing wall disposed above the adapter body; and a first fitting cylinder extending through the first opposing wall in a vertical direction. The adapter body includes: a second fitting cylinder embedded within the first fitting cylinder, through a lower end opening of the first fitting cylinder, in a portion of the first fitting cylinder located above the first opposing wall; and a second opposing wall extending radially outward from a portion of the second fitting cylinder located below the first fitting cylinder, intersecting the vertical direction, and facing the first opposing wall in a vertical direction. Furthermore, the portion of the upper surface of the second opposing wall located radially outward relative to the first fitting cylinder is either flat or recessed downward. According to this embodiment of the trigger-type liquid injector, a fitting allowance between the first and second fitting cylinders can be ensured. Therefore, damage to the longitudinal supply cylinder due to falling impacts or other reasons, or detachment of the upright / inverting adapter from the longitudinal supply cylinder, can be prevented. Furthermore, according to this trigger-type liquid injector, a recess is formed in the radially outer portion of the upper surface of the second opposing wall relative to the first fitting cylinder. Therefore, when the upright / inverting adapter is assembled to the longitudinal supply cylinder, interference between the radially outer portion of the upright / inverting adapter relative to the first fitting cylinder and the first fitting cylinder can be prevented. Thus, the assemblability between the upright / inverting adapter and the longitudinal supply cylinder can be improved.

[0022] The fourth aspect of the present invention comprises: an injector body which is mounted to the opening of a container containing liquid via a mounting cover; and a nozzle portion which is mounted to the injector body and has a spray hole for spraying liquid, thus constituting a trigger-type liquid injector. Additionally, the injector body includes: a longitudinal supply cylinder that draws liquid from the container; a trigger mechanism having a trigger portion that can move rearward when a force is applied forward, the trigger mechanism causing liquid to flow from the longitudinal supply cylinder toward the injection hole side by moving the trigger portion rearward; an upright / inverting adapter disposed inside the mounting cover and positioned below the longitudinal supply cylinder along its axis, and connected to the longitudinal supply cylinder; a accumulator cylinder disposed inside the mounting cover and positioned below the upright / inverting adapter along its axis, and connected to the upright / inverting adapter, extending in the vertical direction; and an accumulator plunger disposed within the accumulator cylinder that can move downward when a force is applied upward. Additionally, the longitudinal supply cylinder includes: a first flow path that allows liquid to flow toward the injection port side by rearward movement of the trigger section; and a second flow path that allows a portion of the liquid flowing through the first flow path to flow toward the accumulator cylinder side. Furthermore, the upright / inverting adapter includes: an adapter body that divides a first space communicating with the container body and the first flow path via an upright inlet, and a second space communicating with the container body and the first space via an inverting inlet; a switching valve that cuts off the communication between the first space and the second space when the container body is upright with the injector body installed, and connects the first space and the second space when the container body is inverted; and a relay flow path that connects the second flow path to the accumulator cylinder.

[0023] According to this trigger-type liquid ejector, by operating the trigger while the container is upright, the liquid moves rearward, allowing liquid to flow from the first flow path of the longitudinal supply cylinder toward the injection hole side. This allows the liquid to be ejected outward from the injection hole of the nozzle. Furthermore, a portion of the liquid flowing in the first flow path can be supplied to the accumulator cylinder through the second flow path and the intermediate flow path, thus pressurizing the accumulator cylinder. This allows the accumulator plunger to move downward against an upward force. Therefore, liquid can be ejected while the accumulator plunger moves downward. Thus, whenever the trigger is pulled, liquid can be accumulated (filled) in the accumulator cylinder while liquid is ejected.

[0024] If the trigger operation is stopped after the liquid is filled into the accumulator cylinder, the supply of liquid into the accumulator cylinder stops, but the accumulator plunger begins to move upwards to reset. This allows liquid filled in the accumulator cylinder to be introduced from the accumulator cylinder towards the injection port and ejected from the injection port. Therefore, continuous liquid injection is possible. It should be noted that since the switching valve cuts off the connection between the first and second spaces when the container is upright, after liquid is ejected, liquid can be drawn from the container towards the first flow path through the upright inlet, preparing for the next injection operation.

[0025] Next, with the trigger moved backward while the container is inverted, continuous liquid injection is performed in the same manner as when the container is upright. Furthermore, since the switching valve connects the first and second spaces when the container is inverted, after liquid is ejected, liquid can be drawn from the container body towards the first flow path through the inverted inlet. Therefore, preparation for the next injection operation can be made. Thus, continuous liquid injection can be performed with the container body in either an upright or inverted position.

[0026] Specifically, the upright / inverting adapter is connected below the longitudinal supply cylinder, and the accumulator is connected below the upright / inverting adapter. Therefore, the longitudinal supply cylinder, the upright / inverting adapter, and the accumulator are arranged vertically in series along the axis of the longitudinal supply cylinder. Therefore, even if both the upright / inverting adapter and the accumulator are positioned inside the mounting cover, the diameter of the mounting cover can be prevented from becoming too large. Therefore, miniaturization of the trigger-type liquid injector can be easily achieved, for example, improving operability when operating the trigger while holding the container.

[0027] In a fifth embodiment of the present invention, based on the trigger-type liquid injector of the fourth embodiment described above, the longitudinal supply cylinder includes: an outer cylinder, which is mounted to the opening of the container body via the mounting cap; and an inner cylinder, which is fitted inside the outer cylinder. Furthermore, a first flow path is formed inside the inner cylinder. Additionally, a second flow path is formed between the inner cylinder and the outer cylinder.

[0028] According to this trigger-type liquid injector, the longitudinal supply cylinder is configured as a double-layered cylinder by means of an outer cylinder and an inner cylinder. Therefore, the first and second flow paths can be easily formed with appropriate division of the flow paths, thus simplifying the structure.

[0029] In the sixth aspect of the present invention, based on the trigger-type liquid injector of the fourth or fifth aspect described above, the accumulator cylinder is formed as a topped cylinder with a downward opening. Furthermore, the accumulator plunger moves downward from its highest position by the liquid supplied to the accumulator cylinder through a rearward movement of the trigger portion. Additionally, a recovery hole communicating between the accumulator cylinder and the container body is formed on the cylinder wall of the accumulator cylinder at a portion lower than that of the accumulator plunger at its highest position.

[0030] According to this trigger-type liquid ejector, for example, when the container is inverted, liquid located in a space below the accumulator plunger that has entered the accumulator cylinder can be discharged through the recovery port. Furthermore, when the container is restored to an upright position after being inverted, air can be introduced into the container through the recovery port even if liquid remains in the accumulator cylinder. Therefore, air displacement can be used to discharge the remaining liquid into the container through the opening of the accumulator cylinder. This prevents liquid from accumulating in the accumulator cylinder and facilitates smooth movement of the accumulator plunger.

[0031] Technical effect

[0032] According to the present invention, a trigger-type liquid injector capable of continuous spraying in both upright and inverted positions can be provided, and a trigger-type liquid injector capable of suppressing the tendency of the diameter of the mounting cap to become too large and capable of continuous spraying in both upright and inverted positions can also be provided. Attached Figure Description

[0033] Figure 1 This is a longitudinal sectional view of the trigger-type liquid injector according to the first embodiment.

[0034] Figure 2 yes Figure 1 A magnified view of a portion of the image.

[0035] Figure 3 This is a bottom view of the inner cylinder.

[0036] Figure 4 This is a longitudinal sectional view showing a second embodiment of the trigger-type liquid injector of the present invention, with the container body in an upright position.

[0037] Figure 5 It is Figure 4 The enlarged sectional view of the periphery of the mounting cover is shown.

[0038] Figure 6 Is it to Figure 4 The diagram shows a longitudinal sectional view of a trigger-type liquid injector with the container body in an inverted position.

[0039] Figure 7 It is Figure 6 The enlarged sectional view of the periphery of the mounting cover is shown.

[0040] Symbol Explanation

[0041] 1. 201 Trigger-type Liquid Injector

[0042] 2.202 Injector Body

[0043] 3. 204 Injection Hole

[0044] 4. 203 Nozzle Components (Nozzle Section)

[0045] 7. 250 Upright / Inverted Adapter

[0046] 8.253 Adapter Main Body

[0047] 10, 210 Longitudinal supply cylinder section

[0048] 11, 211 Installation cover

[0049] 16, 230 trigger mechanism

[0050] 21, 212 outer cylinder

[0051] 22, 213 Inner cylinder

[0052] 22a, 213b Inner cylinder small diameter section (first fitting cylinder section, small diameter section)

[0053] 22b, 213c Inner cylinder stepped section (first opposing wall, flange section)

[0054] 22c, 213a Large diameter part of the inner cylinder (large diameter part)

[0055] 31, 280 Accumulation Cylinder

[0056] 32, 300 Accumulation Plunger

[0057] 40, 231 Trigger section

[0058] 110a, 261 Fitting cylindrical section (second fitting cylindrical section, first cylindrical section)

[0059] 115, 263 First flange (second opposing wall, connecting wall portion)

[0060] 118, 252 Inverted Inlet Port

[0061] 125. S4 Valve Chamber (Second Space)

[0062] 126, 254 ball valves (switching valves)

[0063] 127. S3 First Space

[0064] 131a, 251 Upright inlet (upper opening)

[0065] 283 Recycling Hole

[0066] A. 200A container body

[0067] A1, 200A1 mouth section

[0068] O-axis (central axis of the longitudinal supply cylinder)

[0069] O1 axis (center axis of the accumulator cylinder)

[0070] O2 axis (central axis of the injection tube)

[0071] O3 shaft (pump shaft)

[0072] O4 axis (central axis of the longitudinal supply cylinder, first axis)

[0073] O5 axis (central axis of the injection tube, second axis)

[0074] O6 axis (center axis and third axis of the accumulator cylinder)

[0075] R1 internal flow path (first flow path)

[0076] R2 external flow path (second flow path)

[0077] R3 relay path

[0078] S1 Recycling Space

[0079] S2 Confluence Space

[0080] S5 Storage Space Detailed Implementation

[0081] (First Implementation)

[0082] Hereinafter, a first embodiment of the present invention will be described with reference to the accompanying drawings. In this embodiment, a spray container with a trigger-type liquid injector 1 installed in container body A will be used as an example for description. Figure 1The trigger-type liquid injector 1 shown includes: an injector body 2; a nozzle component 4 having a spray hole 3 for spraying liquid and mounted on the injector body 2; a cover 6 covering the injector body 2 from above, rear, and both sides in the left and right directions L2; ​​and an adapter 7 for upright and inverted operation, which is mounted on the lower end of the injector body 2. In this embodiment, the liquid contained in the container A is preferably a detergent (a foaming detergent containing surfactants) used in bathrooms, toilets, etc., and has a viscosity similar to that of water. The liquid contained in the container A can be appropriately varied.

[0083] The injector body 2 has a longitudinal supply cylinder 10, a mounting cover 11, a connecting cylinder 12, an accumulator pump 13, an ejection cylinder 14, and a trigger mechanism 16 having a main pump 15.

[0084] In this embodiment, the central axis of the longitudinal supply cylinder 10 is referred to as axis O. The direction along axis O is defined as the up-down direction. In the up-down direction, the container body A side is defined as the lower side, and its opposite side as the upper side. Viewed from the up-down direction, one of the directions intersecting axis O (radial) is defined as the front-back direction L1, and the direction orthogonal to the front-back direction L1 is defined as the left-right direction L2. In the front-back direction L1, the nozzle component 4 side is defined as the front side, and its opposite side as the rear side.

[0085] The longitudinal supply cylinder 10 supplies liquid drawn from the container A via the main pump 15. The longitudinal supply cylinder 10 includes an outer cylinder 21 and an inner cylinder 22 embedded inside the outer cylinder 21. The outer cylinder 21 is formed as a multi-stage cylinder with its diameter decreasing upwards. Specifically, the outer cylinder 21 has an upper outer cylinder small-diameter portion 21a and an outer cylinder large-diameter portion 21c connected to the lower part of the outer cylinder small-diameter portion 21a via an outer cylinder step portion 21b. The inner cylinder 22 is also formed as a multi-stage cylinder, similar to the outer cylinder 21. Specifically, the inner cylinder 22 has an upper inner cylinder small-diameter portion 22a and an inner cylinder large-diameter portion 22c connected to the lower part of the inner cylinder small-diameter portion 22a via an inner cylinder step portion 22b.

[0086] The longitudinal supply cylinder 10 is configured such that, with the stepped portions 21b and 22b of the outer cylinder 21 and inner cylinder 22 spaced apart vertically, the small-diameter portions 21a and 22a are interlocked, and the large-diameter portions 21c and 22c are interlocked. The small-diameter portion 22a of the inner cylinder penetrates the stepped portion 22b of the inner cylinder vertically. The portion of the small-diameter portion 22a of the inner cylinder that protrudes further downward than the stepped portion 22b of the inner cylinder constitutes the inner cylinder protrusion 22d. Figure 2 , Figure 3As shown, a connecting rib 22h is formed in the inner cylinder step portion 22b. The connecting rib 22h protrudes downward from the inner cylinder step portion 22b and extends radially. The connecting rib 22h is positioned between the inner cylinder large diameter portion 22c and the inner cylinder protrusion 22d. Two connecting ribs 22h extend in front of the inner cylinder protrusion 22d, offset circumferentially to both sides relative to the axis O when viewed from the front. In the inner cylinder large diameter portion 22c, a flange portion 22e is formed in a portion lower than the outer cylinder large diameter portion 21c, extending radially (in a direction intersecting the axis O when viewed from above and below) outward.

[0087] like Figure 1 As shown, a ball valve 23 is provided inside the small-diameter section 22a of the inner cylinder. The ball valve 23 is configured to be able to contact and separate from the lower valve seat 22f located in the small-diameter section 22a from above. The ball valve 23 switches between communication and disconnection between the container body A inside the small-diameter section 22a and the main pump section 15. Specifically, the ball valve 23 is configured as a check valve that disconnects the communication between the container body A and the main pump section 15 when pressurized by the main pump section 15 (the main cylinder 41 described later), and allows communication between the container body A and the main pump section 15 when depressurized by the main pump section 15.

[0088] The mounting cover 11 is formed as a cylindrical shape extending in the vertical direction. The mounting cover 11 is fastened to the opening A1 in a detachable manner with the flange portion 22e clamped between it and the upper opening edge of the opening A1 in the container body A via a sealing member. It should be noted that the method of fixing the mounting cover 11 to the opening A1 can also be a method other than threading (e.g., fitting).

[0089] The connecting cylinder 12 extends forward from the upper end of the outer cylinder small-diameter portion 21a. The rear end opening of the connecting cylinder 12 communicates with the inner cylinder small-diameter portion 22a through a connecting port 22g formed in the inner cylinder small-diameter portion 22a. A sealing plug 28 is installed at the front end opening of the connecting cylinder 12. The sealing plug 28 closes the front end opening of the connecting cylinder 12. An accumulation valve 29 is provided in the inner cylinder small-diameter portion 22a, located above the ball valve 23. The accumulation valve 29 is configured to be able to contact and separate from the upper valve seat portion 22h located in the inner cylinder small-diameter portion 22a from above. The accumulation valve 29 switches the connection and disconnection between the main pump portion 15 and the accumulation pump portion 13 through the connecting cylinder 12 and the longitudinal supply cylinder portion 10. Specifically, the accumulator valve 29 is configured as a check valve that allows liquid to be supplied from the longitudinal supply cylinder 10 to the accumulator pump 13 (accumulator cylinder 31 described later) when the main pump section 15 is pressurized, and restricts the liquid from flowing out of the accumulator pump 13 into the longitudinal supply cylinder 10.

[0090] The accumulator pump section 13 includes an accumulator cylinder 31, an accumulator plunger 32, and a force-applying member 33. The accumulator cylinder 31 is positioned above the longitudinal supply cylinder section 10. The accumulator cylinder 31 has a front wall portion 31a located at the front end and a cylinder barrel 31b extending rearward from the outer periphery of the front wall portion 31a, and is formed into a topped cylindrical shape with a rearward opening. In this embodiment, the central axis of the accumulator cylinder 31 (cylinder barrel 31b) is referred to as axis O1. In this embodiment, axis O1 extends along the longitudinal direction L1. However, axis O1 may not be aligned with the longitudinal direction L1.

[0091] A supply hole 31c is formed at the front end of the cylinder 31b and the front end of the connecting cylinder 12. The supply hole 31c extends vertically through the lower part of the cylinder 31b and the upper part of the connecting cylinder 12. The supply hole 31c connects the inside of the accumulator cylinder 31 with the inside of the connecting cylinder 12. It should be noted that a spring seat component 35 is embedded in the rear end opening of the cylinder 31b. A connecting port 31d is formed in the front wall portion 31a, extending vertically through the front wall portion 31a in the front-rear direction L1. The connecting port 31d is coaxially arranged with the axis O1.

[0092] like Figure 1 , Figure 2 As shown, a liquid recovery passage 36 is formed between the outer cylinder small diameter portion 21a and the inner cylinder small diameter portion 22a. The liquid recovery passage 36 is, for example, a longitudinal groove extending vertically on the inner circumferential surface of the outer cylinder small diameter portion 21a. The liquid recovery passage 36 is formed in the portion located rearward relative to the axis O. The upper end of the liquid recovery passage 36 opens inside the cylinder 31b. The lower end of the liquid recovery passage 36 opens in the space (hereinafter referred to as the recovery space S1) surrounded by the outer cylinder step portion 21b and the inner cylinder step portion 22b.

[0093] The accumulator plunger 32 is configured to move along the longitudinal direction L1 within the accumulator cylinder 31. The accumulator plunger 32 is formed as a topped cylinder with a rearward opening. Specifically, the accumulator plunger 32 has a closed wall 32a at its front end and a sliding cylinder 32b extending rearward from the outer periphery of the closed wall 32a, and is formed as a topped cylinder with a rearward opening. The accumulator plunger 32 moves back and forth within the accumulator cylinder 31 while sliding on the inner periphery of the cylinder 31b with the outer peripheral surface of the sliding cylinder 32b sliding against it, thereby causing the closed wall 32a to separate from the front wall portion 31a from the rearward contact.

[0094] The force-applying component 33 is located behind the accumulating plunger 32. The force-applying component 33 is disposed between the accumulating plunger 32 and the spring seat component 35, and applies force to the accumulating plunger 32 in a forward direction.

[0095] The injection barrel portion 14 extends forward from the front wall portion 31a. The injection barrel portion 14 is configured to communicate with the accumulator cylinder 31 via the communication port 31d. In this embodiment, the central axis of the injection barrel portion 14 is referred to as axis O2. Axis O2 extends parallel to axis O1 in the front-rear direction L1. Alternatively, axis O2 may be coaxial with axis O1. Furthermore, axis O2 may not be aligned with the front-rear direction L1.

[0096] The trigger mechanism 16 includes a main pump section 15 and a trigger section 40. The main pump section 15 performs the accumulation and pressurization of liquid in the container A according to the operation of the trigger section 40. The main pump section 15 includes a main cylinder 41 and a main piston 42. The main cylinder 41 is located in front of the small-diameter outer cylinder section 21a in the longitudinal supply cylinder section 10. The main cylinder 41 is formed into a bottomed cylinder with an opening facing forward, centered on the pump axis O3 along the longitudinal direction L1. The main cylinder 41 is inserted from the front into a mounting cylinder 46 that extends forward from the longitudinal supply cylinder section 10 (small-diameter outer cylinder section 21a).

[0097] A connecting cylinder 41a is provided on the bottom wall of the main cylinder 41, which communicates with the interior of the longitudinal supply cylinder 10 (inner cylinder small diameter portion 22a). The connecting cylinder 41a protrudes rearward from the outer periphery of the bottom wall of the main cylinder 41. The rear end of the connecting cylinder 41a is inserted into the portion of the small diameter portions 21a and 22a that is located above the ball valve 23. The rear end opening of the connecting cylinder 41a is open inside the longitudinal supply cylinder 10 (inner cylinder small diameter portion 22a). That is, the interior of the main cylinder 41 and the interior of the longitudinal supply cylinder 10 are connected through the connecting cylinder 41a.

[0098] like Figure 2 As shown, an external gas inlet hole 44 is formed on the peripheral wall of the main cylinder 41, in the portion located below the pump axis O3. The external gas inlet hole 44 communicates with an inlet passage 45, which is formed between the peripheral wall of the main cylinder 41 and the mounting cylinder 46. The inlet passage 45 communicates with an external gas communication hole 47 formed in the mounting cylinder 46. The external gas communication hole 47 penetrates the portion of the mounting cylinder 46 exposed in the recovery space S1 (the portion constituting the outer cylinder step 21b) in the vertical direction. A supply hole 49 is formed in the portion of the inner cylinder step 22b located between the connecting ribs 22h. The supply hole 49 penetrates the inner cylinder step 22b in the vertical direction. The lower opening of the supply hole 49 opens into the space (hereinafter referred to as the confluence space S2) surrounded by the inner cylinder 22 and the forward / reverse adapter 7.

[0099] like Figure 1As shown, the main piston 42 is disposed within the main cylinder 41 in a manner that allows it to move in the front-rear direction L1. The main piston 42 includes a piston body portion 42a and a sliding cylinder portion 42b. The piston body portion 42a is formed into a top cylindrical shape centered on the pump axis O3. The piston body portion 42a is supported by a piston guide portion 50 protruding from the bottom wall of the main cylinder 41 in a manner that allows it to move back and forth. A force-applying member 43 is provided between the piston body portion 42a and the main cylinder 41 (piston guide portion 50). The force-applying member 43 applies a force to the main piston 42 forward via the piston body portion 42a. Thus, the main piston 42 is configured to move in the front-rear direction L1 when a force is applied forward.

[0100] A discharge hole 51 is formed in the portion of the outer cylinder small diameter section 21a that is exposed within the piston guide section 50. The discharge hole 51 extends through the outer cylinder small diameter section 21a in the front-rear direction. An internal pressure recovery passage 52 is formed between the outer cylinder small diameter section 21a and the inner cylinder small diameter section 22a. The internal pressure recovery passage 52 is, for example, a longitudinal groove extending in the vertical direction in the portion of the inner circumferential surface of the outer cylinder small diameter section 21a opposite to the liquid recovery passage 36. The upper end of the internal pressure recovery passage 52 communicates with the discharge hole 51. A through hole 53 is formed in the portion of the inner cylinder stepped section 22b that is in front of the axis O1 and extends through the inner cylinder stepped section 22b in the vertical direction. The through hole 53 is formed at a position that coincides with the internal pressure recovery passage 52 when viewed from the vertical direction. The upper opening of the through hole 53 communicates with both the liquid recovery passage 36 and the internal pressure recovery passage 52 in the recovery space S1. The lower opening of the through hole 53 communicates with the confluence space S2.

[0101] The sliding cylinder portion 42b is connected to the rear end of the piston body portion 42a. The sliding cylinder portion 42b is formed into a cylindrical shape and is arranged coaxially with the pump axis O3. The sliding cylinder portion 42b surrounds the piston body portion 42a. The sliding cylinder portion 42b is in close contact with the inner circumferential surface of the main cylinder body 41. The sliding cylinder portion 42b slides on the inner circumferential surface of the main cylinder body 41 as the main piston 42 moves back and forth relative to the main cylinder body 41.

[0102] The trigger section 40 extends forward and downward in front of the longitudinal supply cylinder section 10. The upper end of the trigger section 40 is supported by a bearing section 48 located below the injection cylinder section 14, in a manner that allows it to rotate about an axis along the left-right direction L2. The front end of the piston body section 42a is connected to the middle portion of the trigger section 40 in the vertical direction. Therefore, the main piston 42 moves rearward relative to the main cylinder body 41 as the trigger section 40 rotates rearward.

[0103] The nozzle component 4 is assembled to the injection barrel 14 from the front. The nozzle component 4 is formed as a topped cylindrical shape with an opening facing rearward. The nozzle component 4 communicates with the injection barrel 14. An injection hole 3 is formed on the top wall of the nozzle component 4. The injection hole 3 penetrates the top wall of the nozzle component 4 in the front-rear direction L1.

[0104] An adapter 7 for upright and inverted operation is installed at the lower end of the longitudinal supply cylinder 10. The adapter 7 can spray liquid from the container A in either an upright position (with the opening A1 facing upwards) or an inverted position (with the opening A1 facing downwards). The adapter 7 includes a first mounting member 100 and a second mounting member 101 assembled in the vertical direction, and a partition member 102 separating the first mounting member 100 and the second mounting member 101. It should be noted that the first mounting member 100, the second mounting member 101, and the partition member 102 constitute the adapter body 8 of this embodiment.

[0105] like Figure 2 As shown, the first mounting member 100 is formed as a multi-stage cylindrical shape that narrows towards the top. Specifically, the first mounting member 100 includes a small-diameter portion 110, a medium-diameter portion 111, and a large-diameter portion 112.

[0106] The small-diameter portion 110 is coaxially arranged with axis O. A first flange 115 extending radially outward is formed in a portion of the small-diameter portion 110 located above the lower end edge. That is, the small-diameter portion 110 extends through the first flange 115 in the vertical direction. The portion of the small-diameter portion 110 located above the first flange 115 constitutes a fitting cylindrical portion 110a that fits into the inner cylinder small-diameter portion 22a. The fitting cylindrical portion 110a is inserted into the portion of the inner cylinder small-diameter portion 22a located above the outer cylinder step portion 21b through the lower end opening of the inner cylinder small-diameter portion 22a. The portion of the small-diameter portion 110 located below the first flange 115 constitutes a protruding cylindrical portion 110b that protrudes inward toward the first mounting member 100. It should be noted that the first flange 115 is arranged close to the lower end edge of the connecting rib 22h.

[0107] The intermediate diameter portion 111 extends downward from the outer periphery of the first flange 115. The intermediate diameter portion 111 fits into the inner cylinder's large diameter portion 22c from below. Thus, the lower opening of the inner cylinder's large diameter portion 22c is closed. A second flange 116 extending radially outward is formed at the lower edge of the intermediate diameter portion 111. The second flange 116 approaches or abuts against the lower edge of the inner cylinder's large diameter portion 22c from below. Figure 2As shown, a connecting groove 117 is formed on the outer peripheral surface of the middle diameter portion 111 and the upper surface of the second flange 116. The connecting groove 117 is an L-shaped groove extending across the outer peripheral surface of the middle diameter portion 111 and the upper surface of the second flange 116 in side view. The connecting groove 117 is preferably formed as a portion located rearward relative to the axis O. In the illustrated example, the connecting groove 117 is formed at a position offset circumferentially relative to the axis O when viewed from the front. The upper opening of the connecting groove 117 communicates with the confluence space S2. The lower opening of the connecting groove 117 communicates with the interior of the container body A. That is, the liquid flowing through the liquid recovery passage 36 and the gas flowing through the inlet passage 45 and the internal pressure recovery passage 52 communicate with the interior of the container body A through the confluence space S2 and the connecting groove 117.

[0108] The large diameter portion 112 extends downward from the outer periphery of the second flange 116. An inverted inlet 118 is formed at the front of the large diameter portion 112 (further forward than the axis O), which radially penetrates the large diameter portion 112.

[0109] The separator 102 has a first connecting tube 120 and a second connecting tube 121.

[0110] The first connecting cylinder 120 is coaxially arranged with axis O1. A protruding cylinder portion 110b fits into the first connecting cylinder 120 from above. The second connecting cylinder 121 is connected to the front of the first connecting cylinder 120. The second connecting cylinder 121 gradually narrows as it faces downwards. In this embodiment, the space defined between the second connecting cylinder 121 and the first mounting member 100 constitutes a valve chamber (second space) 125. The valve chamber 125 communicates with the container body A through the aforementioned inverted inlet 118. A ball valve 126 is housed in the valve chamber 125. The ball valve 126 contacts and separates from the lower opening edge of the second connecting cylinder 121, thereby controlling...

[0111] The lower opening of the second connecting tube 121 is opened and closed.

[0112] The second mounting component 101 has a closure portion 130 and a fixing cylinder 131. The closure portion 130 is formed as a bottomed cylinder that opens upwards. The closure portion 130 is fitted into the large-diameter portion 112 with the separating component 102 sandwiched in the middle. The fixing cylinder 131 extends vertically through the bottom wall of the closure portion 130 at its rear (coaxial with axis O). A suction cylinder 135 is fitted into the lower part of the fixing cylinder 131. The upper opening (upright inlet) 131a of the fixing cylinder 131 communicates with the interior of the first connecting cylinder 120. Therefore, the first connecting cylinder 120 communicates with the interior of the container body A through the fixing cylinder 131. On the other hand, the second connecting cylinder 121 communicates with the interior of the container body A through the inverted inlet 118.

[0113] The space defined by the enclosure 130, the fixed cylinder 131, and the second connecting cylinder 121 constitutes a connecting flow path 140 that connects the valve chamber 125 to the fixed cylinder 131. The connecting flow path 140 communicates with the interior of the fixed cylinder 131 through a slit 141 formed in the fixed cylinder 131. It should be noted that the space from the connecting flow path 140 through the slit 141 to the small-diameter portion 110 constitutes the first space 127 of this embodiment.

[0114] As described above, the adapter 7 for upright and inverted operation is assembled to the longitudinal supply cylinder 10 by fitting the fitting cylinder portion 110a into the inner cylinder small diameter portion 22a and the middle diameter portion 111 into the inner cylinder large diameter portion 22c. In this case, the first flange 115 is positioned opposite the inner cylinder step portion 22b at intervals in the vertical direction. The portion of the upper surface of the first flange 115 located around the inner cylinder small diameter portion 22a constitutes a recessed portion 115a. The recessed portion 115a is formed as a flat surface orthogonal to the vertical direction. That is, the portion of the first mounting member 100 located radially outward relative to the inner cylinder small diameter portion 22a is open radially outward. In this embodiment, the recessed portion 115a is opposite the connecting rib 22h in the vertical direction. This ensures the length of the connecting rib 22h in the vertical direction, thereby easily ensuring the strength of the inner cylinder protrusion 22d.

[0115] A protrusion 145 is formed in the first flange 115 at a position further forward than the recessed portion 115a. The protrusion 145 protrudes upward from the portion of the first flange 115 located circumferentially between the connecting ribs 22h. The protrusion 145 is arranged at a distance in front of the inner cylinder protrusion 22d in the first flange 115.

[0116] Next, the operation of the trigger-type liquid injector 1 will be explained. The following explanation will cover the injection action in the upright position and the injection action in the inverted position. In the upright position of the injection container, ball valve 23 is seated on the lower valve seat 22f due to its own weight, and ball valve 126 is seated on the lower opening edge of the second connecting cylinder 121 due to its own weight. In the upright position of the injection container, the trigger 40 is pulled rearward from the initial position to eject the liquid from the container body A. As a result, the main piston 42 moves rearward from its foremost position, and the main cylinder 41 is pressurized. Consequently, the liquid in the main cylinder 41 is supplied to the longitudinal supply cylinder 10 (inner cylinder small diameter portion 22a) through the connecting cylinder 41a. The liquid supplied to the longitudinal supply cylinder 10 then pushes the ball valve 23 downward and pushes the accumulator valve 29 upward. Therefore, with the ball valve 23 in contact with the lower valve seat 22f, the accumulator valve 29 moves upward away from the upper valve seat 22h. It should be noted that when the main piston 42 moves rearward, the gas between the piston body 42a and the piston guide 50 flows into the confluence space S2 through the discharge port 51, the internal pressure recovery passage 52, and the through port 53, and is then discharged into the container A through the connecting groove 117.

[0117] Then, the liquid in the longitudinal supply cylinder 10 is supplied to the accumulating cylinder 31 through the connecting cylinder 12 and the supply hole 31c. If the accumulating cylinder 31 is pressurized due to the inflow of liquid into it, the accumulating plunger 32 moves backward from its forward position against the force of the force-applying member 33. As a result, liquid accumulates in the accumulating cylinder 31. By moving the accumulating plunger 32 backward, the sealing wall 32a moves backward from the front wall portion 31a of the accumulating cylinder 31, and the connecting port 31d is opened. As a result, the liquid accumulated in the accumulating cylinder 31 passes through the supply hole 31c into the ejection cylinder 14 and is ejected to the outside through the ejection hole 3.

[0118] As in this embodiment, in the structure equipped with the accumulator pump section 13, whenever the trigger section 40 is operated, a portion of the liquid supplied from the main cylinder 41 to the accumulator cylinder 31 is ejected through the injection hole 3, and a portion of the liquid is accumulated in the accumulator cylinder 31. Therefore, when the operation of the trigger section 40 is stopped, although the supply of liquid to the accumulator cylinder 31 stops, the accumulator plunger 32 moves forward by the force of the force-applying member 33, thereby continuously supplying the liquid accumulated in the accumulator cylinder 31 to the injection barrel section 14. Thus, even when the operation of the trigger section 40 is stopped, liquid can be continuously ejected through the injection hole 3. It should be noted that excess liquid in the accumulator cylinder 31 is discharged from the accumulator cylinder 31 through the liquid recovery passage 36. The liquid flowing into the liquid recovery passage 36 flows into the confluence space S2 through the through hole 53 and then returns to the container body A through the connecting groove 117.

[0119] If the operating force on the trigger 40 is released, the force applied by the force-applying component 43 causes the main piston 42 to move forward within the main cylinder 41, and the trigger 40 also moves forward. As a result, the pressure in the main cylinder 41 is reduced. The ball valve 23 then floats from the lower valve seat 22f, and the container A and the main cylinder 41 are connected through the inner cylinder small-diameter section 22a. On the other hand, the accumulator valve 29, by maintaining its seat on the upper valve seat 22h, cuts off the connection between the main cylinder 41 and the accumulator cylinder 31 through the inner cylinder small-diameter section 22a. Furthermore, by causing the ball valve 23 to float from the lower valve seat 22f, negative pressure is applied to the connecting flow path 140 through the inner cylinder small-diameter section 22a. Therefore, by maintaining the ball valve 126 seated at the lower opening edge of the second connecting cylinder 121, the connection between the connecting flow path 140 and the valve chamber 125 is cut off. As a result, the liquid inside container A flows into the trigger-type liquid injector 1 through the suction cylinder 135. After flowing into the suction cylinder 135 through the connecting flow path 140 into the inner cylinder small-diameter portion 22a, the liquid flows into the main cylinder 41 through the connecting cylinder 41a. It should be noted that by allowing the liquid to flow into the suction cylinder 135, the pressure inside container A is reduced. Then, after external gas flows into the recovery space S1 through the external gas inlet hole 44, the inlet passage 45, and the external gas connecting hole 47, it flows into the confluence space S2 through the supply hole 49. The external air flowing into the confluence space S2 flows into container A through the connecting groove 117.

[0120] Next, when the injection container is used in an inverted position, ball valve 23 moves away from the lower valve seat 22f due to its own weight, and ball valve 126 moves away from the lower opening edge of the second connecting cylinder 121 due to its own weight. Even in the inverted position, the main cylinder 41 is pressurized by pulling the trigger 40 backward. Therefore, the liquid in the main cylinder 41 flows into the inner cylinder small diameter portion 22a through the connecting cylinder 41a, and then flows into the accumulator cylinder 31 through the connecting cylinder 12. Afterward, a portion of the liquid flowing into the accumulator cylinder 31 is ejected through the injection hole 3, and a portion of the liquid is accumulated in the accumulator cylinder 31.

[0121] Even in the inverted position, the pressure inside the main cylinder 41 is reduced by releasing the operating force on the trigger 40. As a result, the liquid in container A flows into valve chamber 125 through inverted inlet 118, and then flows into first connecting cylinder 120 through the lower opening of second connecting cylinder 121, connecting flow path 140, and slit 141. The liquid flowing into first connecting cylinder 120 circulates within the small-diameter portion 22a of the inner cylinder, and is then guided into main cylinder 41 through connecting cylinder 41a.

[0122] Furthermore, even in the inverted position, if the operation of the trigger 40 is stopped, the accumulator plunger 32 moves forward by the force of the force-applying member 33, thereby continuously supplying the liquid accumulated in the accumulator cylinder 31 to the injection barrel 14. Thus, even when the operation of the trigger 40 is stopped, liquid can be continuously ejected through the injection hole 3.

[0123] Thus, in this embodiment, because it includes the accumulator pump 13, a portion of the liquid flowing into the accumulator cylinder 31 can be ejected through the injection port 3, and a portion of the liquid can be accumulated in the accumulator cylinder 31. Therefore, even without operating the trigger 40, the liquid accumulated in the accumulator cylinder 31 can be ejected using the forward force acting on the accumulator plunger 32. Furthermore, in the trigger-type liquid injector 1 of this embodiment, because it includes the upright and inverted adapter 7, liquid can be ejected in either the upright or inverted position. As a result, continuous liquid injection can be performed in both the upright and inverted positions.

[0124] In particular, in this embodiment, by extending the accumulator cylinder 31 (and the accumulator plunger 32) in the front-to-back direction, the volume of the accumulator cylinder 31 is easily ensured while suppressing the trigger-type liquid injector 1 from becoming too large in the vertical direction.

[0125] In this embodiment, a structure is adopted in which the accumulator pump section 13 is disposed above the longitudinal supply cylinder section 10. According to this structure, when designing the accumulator pump section 13, it is less likely to be interfered with by other structural components of the trigger-type liquid injector 1. Therefore, the design freedom of the accumulator pump section 13 is increased, and the volume of the accumulator cylinder 31 can be easily ensured.

[0126] In this embodiment, the inner cylinder small-diameter portion 22a has an inner cylinder protrusion 22d that protrudes further downward than the inner cylinder step portion 22b. The small-diameter portion 110 (fitting cylinder portion 110a) is inserted through the lower end opening of the inner cylinder small-diameter portion 22a into a portion located above the outer cylinder step portion 21b. This structure ensures sufficient fitting allowance between the inner cylinder small-diameter portion 22a and the fitting cylinder portion 110a. Therefore, damage to the longitudinal supply cylinder portion 10 due to falling impacts or other reasons, or detachment of the upright / inverting adapter 7 from the longitudinal supply cylinder portion 10, can be prevented. Furthermore, in this embodiment, the upright / inverting adapter 7 has a recessed portion 115a formed in the portion radially outward relative to the inner cylinder protrusion 22d. This structure prevents interference between the radially outward portion of the upright / inverting adapter 7 and the inner cylinder protrusion 22d when the upright / inverting adapter 7 is assembled to the longitudinal supply cylinder portion 10. Therefore, the assemblability between the upright / inverting adapter 7 and the longitudinal supply cylinder 10 can be improved. Furthermore, in this embodiment, a connecting rib 22h is formed protruding downwards from the inner cylinder step portion 22b. Therefore, assuming the upright / inverting adapter 7 is displaced relative to the longitudinal supply cylinder 10 in a forward / backward tilting manner relative to the axis O (in the case of removal), the contact between the upright / inverting adapter 7 (first flange 115) and the connecting rib 22h restricts the displacement of the upright / inverting adapter 7 relative to the longitudinal supply cylinder 10. As a result, it is possible to prevent the upright / inverting adapter 7 from detaching from the longitudinal supply cylinder 10.

[0127] The preferred embodiments of the present invention have been described above, but the present invention is not limited to these embodiments. Additions, omissions, substitutions, and other modifications to the structure are possible without departing from the spirit of the present invention. The present invention is not limited by the above description, but only by the appended claims. In the above embodiments, a structure in which the accumulator pump section 13 is located above the longitudinal supply cylinder section 10 has been described, but the present invention is not limited to this structure. The accumulator pump section 13 can also be located below the longitudinal supply cylinder section 10 as long as it is a structure extending in the front-rear direction.

[0128] In the above embodiment, the structure in which the portion of the upper surface of the first flange 115 surrounding the inner cylinder protrusion 22d is formed as a flat surface has been described, but the structure is not limited to this. The portion of the upper surface of the first flange 115 surrounding the inner cylinder protrusion 22d may also be recessed downwards compared to other portions. In this case, in the upright / inverting adapter 7, the portion located radially outward relative to the inner cylinder protrusion 22d also opens radially outwards, thus achieving the aforementioned effect. Alternatively, a support cylinder or the like may be provided on the first flange 115 for the inner cylinder protrusion 22d to fit into and support the inner cylinder protrusion 22d from the radial outwards. In the above embodiment, the structure in which the inner cylinder small-diameter portion 22a has an inner cylinder protrusion 22d that protrudes downwards further than the inner cylinder stepped portion 22b has been described, but the structure is not limited to this.

[0129] Furthermore, without departing from the spirit of the present invention, the structural elements in the above embodiments can be appropriately replaced with known structural elements, and the above-described modifications can also be appropriately combined.

[0130] (Second Implementation)

[0131] Hereinafter, a second embodiment of the trigger-type liquid injector of the present invention will be described with reference to the accompanying drawings. In this embodiment, a spray container in which a trigger-type liquid injector is mounted on a container body will be used as an example for description.

[0132] like Figure 4 As shown, the trigger-type liquid injector 201 of this embodiment includes: an injector body 202, which is installed at the opening of a container 200A containing liquid; a nozzle part (nozzle component) 203, which has a spray hole for ejecting liquid; a relay member 205, which connects the injector body 202 and the nozzle part 203; and a cover 206, which covers the injector body 202. It should be noted that, unless otherwise specified, all structural components of the trigger-type liquid injector 201 are designed to be molded products made of synthetic resin.

[0133] It should be noted that the liquid contained within the container 200A of this embodiment is preferably a detergent (a foaming detergent containing surfactants) used in bathrooms, toilets, etc., and has a viscosity similar to that of water. However, the choice of liquid is not limited to this. Other examples of liquids that can be used include medicines applied to the body, deodorants sprayed into the air, and liquids containing aromatic components.

[0134] (Injector body)

[0135] The injector body 202 mainly comprises a longitudinal supply cylinder 210, a mounting cover 211, an injection cylinder 220, a trigger mechanism 230, a ball valve 240, an accumulator valve 241, an adapter for upright and inverted operation 250, an accumulator cylinder 280, and an accumulator plunger 300. The injector body 202 of this embodiment, as shown in... Figure 4 The container 200A is in an upright position as shown (with the opening of the container 200A facing upwards), and as shown... Figure 5 Liquid can be ejected in any of the following situations: the container body 200A is in an inverted position (the opening of the container body 200A is facing downwards), as shown, and continuous spraying can be performed in any position.

[0136] like Figure 4 As shown, in this embodiment, the central axis of the longitudinal supply cylinder 210 is designated as the first axis (axis) O4. The side along the first axis O4 closest to the container body 200A is called the lower side, and the opposite side is called the upper side. The direction along the first axis O4 is called the vertical direction. Furthermore, in a top view from the vertical direction, a direction intersecting the first axis O4 is called the front-rear direction L1, and a direction orthogonal to both the vertical and front-rear directions L1 is called the left-right direction L2. In this embodiment, the central axis of the ejection cylinder 220 is designated as the second axis (axis) O5. In this embodiment, the second axis O5 extends along the front-rear direction L1. Furthermore, the direction in the front-rear direction L1 from the longitudinal supply cylinder 210 toward the ejection cylinder 220 is designated as the front, and the opposite direction is designated as the rear.

[0137] (Longitudinal supply cylinder)

[0138] The longitudinal supply cylinder 210 extends vertically and has the function of drawing liquid from the container body 200A. The longitudinal supply cylinder 210 is mounted on the container body 200A via a mounting cap 211. The longitudinal supply cylinder 210 includes a top-cylinder-shaped outer cylinder 212 and an inner cylinder 213 fitted inside the outer cylinder 212.

[0139] like Figure 4 and Figure 6As shown, the outer cylinder 212 includes: a large-diameter portion 212a; a small-diameter portion 212b disposed above the large-diameter portion 212a, with an inner and outer diameter smaller than that of the large-diameter portion 212a; and a flange portion 212c connecting the upper end of the large-diameter portion 212a to the lower end of the small-diameter portion 212b. The upper opening of the small-diameter portion 212b is closed by the top wall portion 212d. The inner cylinder 213 includes: a large-diameter portion (inner cylinder large-diameter portion) 213a; a small-diameter portion (inner cylinder small-diameter portion) 213b disposed above the large-diameter portion 213a, with an inner and outer diameter smaller than that of the large-diameter portion 213a; and a flange portion (inner cylinder stepped portion) 213c connecting the upper part of the large-diameter portion 213a and the lower part of the small-diameter portion 213b. The flange portion 213c of the inner cylinder 213 is located lower than the flange portion 212c of the outer cylinder 212.

[0140] A ring-shaped protruding edge 213d is formed in the large-diameter portion 213a of the inner cylinder 213, located further below the large-diameter portion 212a of the outer cylinder 212, protruding radially outward. The protruding edge 213d is disposed on the upper opening edge of the mouth 200A1 of the container body 200A via a sealing member 214, and is clamped between the upper opening edge of the mouth 200A1 and the mounting cover 211 in a vertical direction. The mounting cover 211 is installed on the mouth 200A1 of the container body 200A, for example, by screwing. Thus, the entire injector body 202 is installed on the mouth of the container body 200A via the mounting cover 211.

[0141] An outer through hole 215 is formed in the front portion of the upper end of the small-diameter portion 212b of the outer cylinder 212, extending through the small-diameter portion 212b in the front-rear direction L1. Furthermore, an inner through hole 216 is formed in the upper end of the small-diameter portion 213b of the inner cylinder 213, extending through the small-diameter portion 213b in the front-rear direction L1 and located behind the outer through hole 215. Additionally, a first flow hole 217 is formed in the upper end of the small-diameter portion 213b of the inner cylinder 213, located behind the inner through hole 216 and separated from the first axis O4.

[0142] The first axis O4 of the longitudinal supply cylinder 210 configured as described above is positioned further rearward than the container axis that passes through the center of the opening 200A1 of the container body 200A in the vertical direction. Furthermore, the longitudinal supply cylinder 210 includes: an internal flow path (first flow path) R1, which causes liquid to flow through the ejection cylinder 220 toward the injection hole 204 of the nozzle 203 by moving the trigger 231 rearward as described later; and an external flow path (second flow path) R2, which causes a portion of the liquid flowing through the internal flow path R1 to flow toward the accumulator 280.

[0143] The internal flow path R1 is configured as an internal space located inside the inner cylinder 213. The external flow path R2 is formed between the small-diameter portion 212b of the outer cylinder 212 and the small-diameter portion 213b of the inner cylinder 213. Specifically, the external flow path R2 is formed in a portion located further rearward than the small-diameter portion 212b between the small-diameter portion 212b of the outer cylinder 212 and the small-diameter portion 213b of the inner cylinder 213, and extends vertically. The external flow path R2 communicates with the internal flow path R1 through a first flow hole 217 formed in the inner cylinder 213. Furthermore, the external flow path R2 communicates with a second flow hole 218, which is formed to penetrate the flange portion 213c of the inner cylinder 213 in the vertical direction.

[0144] (Injection tube section)

[0145] like Figure 4 As shown, an ejection cylinder 220 extending forward along the second axis O5 is connected to the upper end of the longitudinal supply cylinder 210 constructed as described above. The ejection cylinder 220 is formed as a cylinder with a front opening at the front of the injector body 202, and communicates with the portion of the internal flow path R1 of the longitudinal supply cylinder 210 located above the ball valve 240 described later through an outer through hole 215 and an inner through hole 216.

[0146] A cylinder barrel portion 225 is provided below the injection barrel portion 220 and above the mounting cover 211. The cylinder barrel portion 225 protrudes forward from the longitudinal supply barrel portion 210 and opens forward.

[0147] (Trigger mechanism)

[0148] The trigger mechanism 230 includes a trigger section 231, a main cylinder 232, and a main piston 233. The trigger mechanism 230 can cause liquid to flow from the internal flow path R1 of the longitudinal supply cylinder 210 through the injection cylinder 220 toward the injection hole 204 by swinging the trigger section 231 backward.

[0149] The main cylinder 232 is fitted inside the cylinder section 225. The main cylinder 232 is formed as a bottomed cylinder that is open to the front and closed to the rear, and communicates with the portion of the internal flow path R1 of the longitudinal supply section 210 that is located above the ball valve 240 described later.

[0150] The trigger section 231 is positioned in front of the longitudinal supply barrel section 210 such that it can move rearward when force is applied in front. The trigger section 231 is formed to extend in the vertical direction and is positioned below the injection barrel section 220. The upper end of the trigger section 231 is axially supported on the injection barrel section 220 such that it can swing in the front-rear direction L1, and the lower end is positioned in front of the main cylinder 232.

[0151] The main piston 233 is disposed inside the main cylinder 232 in a manner that allows it to move in the front-rear direction L1. The main piston 233 can move in the front-rear direction L1 in conjunction with the swinging of the trigger 231. As a result, the interior of the main cylinder 232 is pressurized and depressurized as the main piston 233 moves in the front-rear direction L1. It should be noted that the main piston 233 is formed as a topped cylinder that is open to the rear and closed to the front.

[0152] The main piston 233, together with the trigger 231, applies forward force through the elastic restoring force (acting force) of the elastic plate 234. As the trigger 231 swings backward, the main piston 233 moves rearward and is pressed into the main cylinder 232. It should be noted that when the trigger 231 is in its most forward swinging position, the main piston 233 is correspondingly in its most forward position. It should also be noted that the elastic plate 234 is positioned between the injection barrel 220 and the trigger 231, applying forward force to the trigger 231.

[0153] (Ball valve, accumulator valve)

[0154] A ball valve 240 and an accumulator valve 241 are provided in the small-diameter portion 213b of the inner cylinder 213 in the longitudinal supply cylinder 210. The ball valve 240 is configured as a check valve. When pressurized in the main cylinder 232, the check valve cuts off the communication between the container 200A in the internal flow path R1 and the main cylinder 232. When depressurized in the main cylinder 232, the check valve moves upward, thereby allowing the communication between the container 200A in the inner cylinder 213 and the main cylinder 232 to pass through.

[0155] An accumulator valve 241 is disposed above the ball valve 240. The accumulator valve 241 is disposed on the inner side of the upper end of the small-diameter portion 213b of the inner cylinder 213. The accumulator valve 241 is configured as a check valve, which allows liquid to be supplied from the internal flow path R1 to the injection barrel portion 220 and the external flow path R2, and restricts the backflow of liquid from the external flow path R2 to the inside of the main cylinder 232. In addition, the accumulator valve 241 also has the function of restricting the entry of liquid (and external gas) from the injection barrel portion 220 side into the main cylinder 232 when the pressure is reduced in the main cylinder 232. It should be noted that the accumulator valve 241 is not limited to an accumulator valve having the function of a check valve as described above. As the accumulator valve 241, an accumulator valve, for example, can be used. This accumulator valve opens when the pressure in the portion of the internal flow path R1 located above the ball valve 240 reaches a predetermined pressure, allowing pressurized liquid to be supplied from the internal flow path R1 into the ejector cylinder 220 and the external flow path R2.

[0156] (Use an adapter for upright and inverted positions)

[0157] like Figure 4 and Figure 6As shown, the upright / inverting adapter 250 is disposed inside the mounting cover 211, and is positioned below the longitudinal supply cylinder 210 along the first axis O4, and is connected to the inner cylinder 213 of the longitudinal supply cylinder 210. Thus, the upright / inverting adapter 250 is disposed inside the mounting cover 211 in a state where it is integrated with the lower part of the longitudinal supply cylinder 210.

[0158] The upright / inverted adapter 250 is an adapter that can spray liquid from the container body 200A in either an upright or inverted position. The upright / inverted adapter 250 includes an adapter body 253 and a ball valve (switching valve) 254. The adapter body 253 divides a first space S3 that connects the container body 200A to the internal flow path R1 of the inner cylinder 213 through an upright inlet 251, and a second space S4 that connects the container body 200A to the first space S3 through an inverted inlet 252. The ball valve 254 cuts off the connection between the first space S3 and the second space S4 when the container body 200A is upright with the injector body 202 installed, and connects the first space S3 and the second space S4 when the container body 200A is inverted.

[0159] Please provide a detailed explanation. For example... Figure 6 As shown, the adapter body 253 includes a first adapter 260 and a second adapter 270 assembled in the vertical direction. The first adapter 260 is positioned higher than the second adapter 270. The first adapter 260 includes: a first cylindrical portion (fitting cylindrical portion) 261 disposed inside the small-diameter portion 213b of the inner cylinder 213; a second cylindrical portion 262 disposed inside the large-diameter portion 213a of the inner cylinder 213; and a connecting wall portion (first flange) 263 that connects the first cylindrical portion 261 and the second cylindrical portion 262.

[0160] The first cylindrical portion 261 is coaxially arranged with the first axis O4 and is formed into a cylindrical shape that opens upwards and downwards. The upper end of the first cylindrical portion 261 is fitted inside the small-diameter portion 213b of the inner cylinder 213. Thus, the first adapter 260 and the longitudinal supply cylindrical portion 210 are integrated. Furthermore, the inner side of the first cylindrical portion 261 communicates with the internal flow path R1 of the inner cylinder 213. The lower end of the first cylindrical portion 261 is located lower than the lower end of the small-diameter portion 213b of the inner cylinder 213 and is located lower than the connecting wall portion 263.

[0161] The connecting wall portion 263 connects the outer peripheral surface of the first cylindrical portion 261 and the inner peripheral surface of the second cylindrical portion 262 in the radial direction. The connecting wall portion 263 is configured to face each other vertically with a gap below the flange portion 213c of the inner cylinder 213. A connecting hole 264 is formed in the connecting wall portion 263 at a position further rearward than the first cylindrical portion 261, extending vertically through the connecting wall portion 263.

[0162] The second cylindrical portion 262 includes: an upper cylindrical portion 262a disposed inside the large-diameter portion 213a of the inner cylinder 213; and a lower cylindrical portion 262b connected to the lower end of the upper cylindrical portion 262a and formed with a diameter larger than that of the upper cylindrical portion 262a, extending downward from the lower end of the upper cylindrical portion 262a. Thus, the second cylindrical portion 262 is formed as a two-stage cylindrical shape with different outer diameters. An upward-facing annular step portion 262c is formed at the connection between the upper cylindrical portion 262a and the lower cylindrical portion 262b. The step portion 262c contacts the lower end of the large-diameter portion 213a of the inner cylinder 213 from below. The lower cylindrical portion 262b is positioned further below the large-diameter portion 213a of the inner cylinder 213.

[0163] The outer diameter of the lower cylindrical portion 262b is smaller than the inner diameter of the opening of the container body 200A. This ensures a predetermined gap between the outer circumferential surface of the lower cylindrical portion 262b and the inner circumferential surface of the opening of the container body 200A. Furthermore, an inverted inlet 252, radially penetrating the first cylindrical portion 261, is formed in the portion of the lower cylindrical portion 262b located further forward than the first cylindrical portion 261. This allows liquid from the container body 200A to be introduced into the inner side of the first adapter 260 through the inverted inlet 252.

[0164] The second adapter 270 includes a topped cylindrical sealing cylinder 271 fitted inside the lower cylindrical portion 262b of the first adapter 260, a first connecting cylinder 272 integrally formed with the top wall of the sealing cylinder 271, a second connecting cylinder 273, and a relay cylinder 274.

[0165] The first connecting cylindrical portion 272 is formed as a cylinder extending vertically through the top wall of the sealing cylindrical portion 271 and is coaxially arranged with the first axis O4. The upper end of the first connecting cylindrical portion 272 is fitted into the inner side of the first cylindrical portion 261 of the first adapter 260. Thus, the first adapter 260 and the second adapter 270 are combined vertically. Furthermore, the entire upright and inverted adapter 250 is integrated with the longitudinal supply cylindrical portion 210.

[0166] Furthermore, the interior of the first connecting cylindrical section 272 is connected to the internal flow path R1 of the inner cylinder 213 via the first cylindrical section 261 of the first adapter 260. Moreover, the lower opening of the first connecting cylindrical section 272 functions as an upright inlet 251. Furthermore, the interior of the first connecting cylindrical section 272 functions as a first space S3 that connects the container body 200A to the internal flow path R1 via the upright inlet 251.

[0167] The second connecting cylindrical portion 273 is formed in the top wall of the sealing cylindrical portion 271, located further forward than the first connecting cylindrical portion 272, and is formed into a cylindrical shape that extends through the top wall in the vertical direction. The second connecting cylindrical portion 273 gradually narrows in diameter as it faces downward. The space divided between the second connecting cylindrical portion 273, the first connecting cylindrical portion 272, and the first adapter 260 functions as a second space S4 (so-called valve chamber) that communicates with the interior of the container body 200A through the inverted inlet 252. A ball valve 254 is housed within the second space S4.

[0168] Ball valve 254 is positioned at the lower opening edge of the second connecting cylinder portion 273 in a reversible manner, and opens and closes the lower opening of the second connecting cylinder portion 273. Specifically, ball valve 254 closes the lower opening of the second connecting cylinder portion 273 (closing valve) when the container body 200A is in an upright position, thereby cutting off the communication between the first space S3 and the second space S4. Furthermore, ball valve 254 opens the lower opening (opening valve) by moving away from the lower opening edge of the second connecting cylinder portion 273 when the container body 200A is in an inverted position, thus connecting the first space S3 and the second space S4 (see reference). Figure 5 ).

[0169] The relay cylinder portion 274 is formed in the top wall of the sealing cylinder portion 271, located further rearward than the first connecting cylinder portion 272, and is formed as a topped cylinder extending through the top wall of the sealing cylinder portion 271 in a vertical direction. In the illustrated example, the relay cylinder portion 274 is arranged rearward of the first connecting cylinder portion 272 in a manner consistent with it. Therefore, a portion of the peripheral wall of the relay cylinder portion 274 is integrally formed with the first connecting cylinder portion 272.

[0170] The peripheral wall of the relay cylinder 274 extends further downward than the upright inlet 251. Furthermore, a storage cylinder 280 is assembled at the lower end of the peripheral wall of the relay cylinder 274. Thus, the internal space of the relay cylinder 274 is divided into the upright inlet 251 and a first space S3. A connecting cylinder 275 is formed on the top wall of the relay cylinder 274, which fits inside the connecting hole 264 formed in the connecting wall portion 263 of the first adapter 260. Therefore, the internal space of the relay cylinder 274 functions as a relay flow path R3, communicating with the external flow path R2 through the second flow hole 218 and with the storage cylinder 280.

[0171] (Accumulation cylinder, accumulator plunger)

[0172] like Figure 4 and Figure 6 As shown, the accumulator cylinder 280 is disposed inside the mounting cover 211, and is positioned below the upright / inverting adapter 250 along the first axis O4, and is connected to the upright / inverting adapter 250. Thus, the accumulator cylinder 280 is disposed inside the mounting cover 211 in a state where it is integrated with the lower part of the upright / inverting adapter 250.

[0173] In this embodiment, the accumulator cylinder 280 is integrally formed with a bottomed cylindrical closed portion 290, which closes the lower cylindrical portion 262b of the second adapter 270 in the upright / inverting adapter 250 from below. The closed portion 290 fits tightly inside the lower end of the lower cylindrical portion 262b. Thus, the lower cylindrical portion 262b of the second adapter 270 is closed from below. Furthermore, a fixing portion 291 extending downward is integrally formed on the front portion of the bottom wall of the closed portion 290. The fixing portion 291 is formed as a cylinder extending in the vertical direction, with openings on both the upper and lower sides.

[0174] The upper end of the tube 292, located inside the container body 200A, is fitted with a lower opening (not shown) at the lower end of the fixed cylindrical part 291. Thus, the upright inlet 251 can communicate with the inside of the container body 200A via the fixed cylindrical part 291 and the tube 292. Therefore, when the container body A is upright, liquid inside the container body A can be guided to the upright inlet 251.

[0175] An accumulator cylinder 280 is integrally formed in the bottom wall of the aforementioned enclosed cylindrical portion 290, located further rearward than the fixed cylindrical portion 291. Thus, the fixed cylindrical portion 291 and the accumulator cylinder are arranged side-by-side in the front-rear direction L1 inside the mounting cover 211. It should be noted that the accumulator cylinder 280 is configured such that the third axis (axis) O6, which serves as the central axis of the accumulator cylinder 280, is slightly offset rearward from the first axis O4. However, this is not a limitation. For example, the accumulator cylinder 280 may be formed such that the first axis O4 and the third axis O6 are coaxially arranged.

[0176] The accumulator cylinder 280 is formed as a topped cylinder that opens downwards, and its upper wall is positioned close to the lower end of the relay cylinder 274 in the upright / inverting adapter 250. A supply cylinder 281 is formed on the upper wall of the accumulator cylinder 280, which fits tightly inside the relay cylinder 274. Thus, the interior of the accumulator cylinder 280 and the interior of the relay cylinder 274 (relay flow path R3) are connected via the supply cylinder 281. Therefore, by swinging the trigger 231 backwards, liquid that has passed through the relay flow path R3 can be supplied to the interior of the accumulator cylinder 280 (accumulation space S5 described later).

[0177] The accumulator plunger 300 is disposed within the accumulator cylinder 280 in a manner that allows it to move vertically along the third axis O6. Thus, the accumulator plunger 300 slides tightly within the accumulator cylinder 280 in the vertical direction. The accumulator plunger 300 moves downward as liquid is supplied into the accumulator cylinder 280. It should be noted that the space located above the accumulator plunger 300 within the accumulator cylinder 280 functions as the accumulator space S5.

[0178] A portion of the liquid flowing through the internal flow path R1 of the inner cylinder 213 is supplied through the first flow hole 217, the external flow path R2, the second flow hole 218, and the intermediate flow path R3, and is thus stored in the storage space S5. The supply of liquid causes the storage plunger 300 to move downward, thereby expanding the storage space S5.

[0179] A force-applying component (e.g., a coil spring) 301 is disposed within the accumulator cylinder 280, located below the accumulator plunger 300. The force-applying component 301 applies an upward force to the accumulator plunger 300. In the initial state before the trigger 231 is actuated, the force-applying component 301 applies an upward force to the accumulator plunger 300. As a result, the accumulator plunger 300 is in its highest position.

[0180] It should be noted that the force-applying component 301 is a metal helical spring coaxially arranged with the third axis O6. For example, a resin spring or other elastic component may also be used as the force-applying component 301.

[0181] Furthermore, a recovery hole 283 is formed in the cylinder wall 282 of the accumulator cylinder 280, in a portion located below the accumulator plunger 300 when it is in its highest position, extending radially through the cylinder wall 282. Thus, the accumulator cylinder 280 and the container body 200A are connected via the recovery hole 283.

[0182] (Relay component)

[0183] like Figure 4 As shown, the relay component 205 is disposed at the front of the injector body 202 configured as described above. The relay component 205 protrudes forward from the injector body 202 by being mounted on the injection barrel portion 220. The relay component 205 includes: a partition wall 205a that covers the front opening of the injection barrel portion 220 from the front; an externally fitted barrel portion 205b that extends rearward from the partition wall 205a and is externally fitted into the injection barrel portion 220; and a mounting barrel portion 205c that extends forward from the partition wall 205a and is used for mounting the nozzle portion 203. It should be noted that a communication hole 205e communicating with the inside of the injection barrel portion 220 is formed in the partition wall 205a.

[0184] (Nozzle section)

[0185] The nozzle section (nozzle component) 203 is mounted to the injector body 202 via the relay component 205. Specifically, the nozzle section 203 is combined with the relay component 205 by being mounted on the mounting cylinder section 205c. It should be noted that the nozzle section 203 is positioned in front of the injector body 202 and protrudes further forward than the relay component 205. The nozzle section 203 is formed as a topped cylinder that opens rearward. An injection hole 204 is formed on the front wall of the nozzle section 203, extending through the front wall in the longitudinal direction L1. Furthermore, a cover section 310 is connected to the front wall of the nozzle section 203 via a hinge section, and this cover section 310 closes the injection hole 204 from the front in a manner that allows it to be opened and closed. The cover section 310 can open and close the injection hole 204 by rotating around the hinge section.

[0186] (Cover)

[0187] The cover 206 is formed to cover the longitudinal supply cylinder 210, the injection cylinder 220 and the main cylinder 232 from the top, rear and left and right directions L2, and is assembled to the outer cylinder 212 of the longitudinal supply cylinder 210.

[0188] (The function of a trigger-type liquid injector)

[0189] Next, the case of using the trigger-type liquid injector 201 configured as described above will be explained. It should be noted that liquid is filled into each part of the trigger-type liquid injector 201 by repeatedly operating the trigger section 231.

[0190] (Injection operation in an upright position)

[0191] The spraying operation in an upright position is explained. It should be noted that, in the upright position, if... Figure 4 and Figure 6 As shown, the ball valve 254 of the upright and inverted adapter 250 is seated at the lower end opening edge of the second connecting cylinder portion 273. Therefore, the communication between the first space S3 and the second space S4 is cut off by the ball valve 254.

[0192] With the container 200A in an upright position, if the trigger 231 is pulled backward against the force of the elastic plate 234, the main piston 233 moves backward from its forward position, and the main cylinder 232 is pressurized. As a result, the liquid in the main cylinder 232 is supplied to the inner side of the inner cylinder 213 in the longitudinal supply cylinder 210, i.e., the internal flow path R1. Specifically, the liquid in the main cylinder 232 is supplied to the portion of the internal flow path R1 located above the ball valve 240. This supplies the liquid, pushing the ball valve 240 downward and actuating the accumulator valve 241.

[0193] Therefore, the liquid in the internal flow path R1 can flow through the injection barrel 220 toward the injection hole 204 of the nozzle 203. Thus, the liquid can be ejected forward from the injection hole 204. Furthermore, a portion of the liquid flowing in the internal flow path R1 can be supplied to the external flow path R2 through the first flow hole 217. As a result, the liquid supplied to the external flow path R2 can be supplied to the storage space S5 of the storage cylinder 280 through the second flow hole 218 and the intermediate flow path R3, and the storage space S5 can be pressurized. Therefore, as the storage space S5 is pressurized, the storage plunger 300 can move downward from its highest position against the force of the force-applying member 301, allowing liquid to accumulate (fill) in the storage space S5. Therefore, whenever the trigger 231 is pulled backward, liquid can be ejected from the injection hole 204 while liquid accumulates in the storage space S5 of the storage plunger 300.

[0194] After liquid is filled into the storage space S5, if the trigger 231 is released, the elastic restoring force (acting force) of the elastic plate 234 causes the trigger 231 to move forward to reset. Furthermore, since the main piston 233 moves forward within the main cylinder 232 as the trigger 231 resets, the pressure within the main cylinder 232 is reduced to a pressure lower than that within the container 200A. Therefore, the ball valve 240 can be raised while the storage valve 241 remains closed.

[0195] Furthermore, by raising the ball valve 240, a negative pressure can be created within the first space S3. At this time, as described above, the connection between the first space S3 and the second space S4 is severed by the ball valve 254. Therefore, by creating a negative pressure within the first space S3, it is possible to... Figure 6 As shown by arrow F1, the liquid in container 200A is drawn into internal flow path R1 through pipe 292, upright inlet 251, and first space S3, and can then be introduced into main cylinder 232. This prepares the container for the next injection.

[0196] Furthermore, if the operation of the trigger section 231 to the rear is stopped, although the supply of liquid to the storage space S5 stops through the external flow path R2, the storage plunger 300 begins to move upwards towards its highest position due to the force of the force-applying member 301. This allows the liquid accumulated in the storage space S5 to be introduced into the injection barrel section 220 through the relay flow path R3 and the external flow path R2, and guided to the injection hole 204. Thus, liquid can be continuously ejected through the injection hole 204. It should be noted that when liquid is introduced from the external flow path R2 towards the injection barrel section 220, the storage valve 241 closes. Therefore, without backflow in the internal flow path R1, liquid can be smoothly guided from the injection barrel section 220 towards the injection hole 204.

[0197] In this way, not only when the trigger 231 is pulled back, but also when the trigger 231 is not operated, liquid can be sprayed out, and continuous liquid spraying can be performed.

[0198] (Jet operation in an inverted position)

[0199] Next, the spraying operation in the inverted position will be explained. It should be noted that, in the inverted position, as... Figure 5 and Figure 4 As shown, the ball valve 254 of the inverted adapter 250 is away from the lower end opening edge of the second communicating cylinder portion 273. Therefore, communication between the first space S3 and the second space S4 is allowed.

[0200] When liquid is sprayed from the inverted position of the container 200A, the operation is the same as in the upright position described above, by pulling the trigger 231 backward against the force of the elastic plate 234. Thus, by the same action as in the upright position described above, continuous liquid spraying is possible.

[0201] It should be noted that when the trigger 231 moves forward to reset while the container 200A is in an inverted position, communication between the first space S3 and the second space S4 is permitted. Therefore, utilizing... Figure 7 The negative pressure within the main cylinder 232 (as indicated by arrow F2) and the first space S3 allows liquid to be drawn from the container 200A into the second space S4 through the inverted inlet 252. Therefore, liquid can be drawn from the second space S4 through the first space S3 into the internal flow path R1, and then introduced into the main cylinder 232. This prepares for the next injection.

[0202] As explained above, the trigger-type liquid ejector 201 according to this embodiment can eject liquid not only when the trigger 231 is pulled back, but also when the trigger 231 is not operated, and can perform continuous liquid ejection. Furthermore, continuous liquid ejection can be performed when the container body 200A is in either an upright or inverted position.

[0203] Specifically, in the trigger-type liquid injector 201 of this embodiment, as Figure 4 As shown, the upright / inverting adapter 250 is connected below the longitudinal supply cylinder 210, and the accumulator cylinder 280 is connected below the upright / inverting adapter 250. Therefore, the longitudinal supply cylinder 210, the upright / inverting adapter 250, and the accumulator cylinder 280 are arranged vertically in series along the first axis O4. Therefore, both the upright / inverting adapter 250 and the accumulator cylinder 280 can be positioned inside the mounting cover 211, and the diameter of the mounting cover 211 can be prevented from becoming too large. Therefore, miniaturization of the trigger-type liquid injector 201 can be easily achieved, for example, improving operability when operating the trigger section 231 while holding the container body 200A.

[0204] Furthermore, according to the trigger-type liquid injector 201 of this embodiment, the longitudinal supply cylinder 210 is configured as a double-layered cylinder by means of the outer cylinder 212 and the inner cylinder 213. Therefore, the internal flow path (first flow path) R1 and the external flow path (second flow path) R2 can be easily formed, and each flow path can be formed in a state of appropriate division, thus easily achieving structural simplification.

[0205] Furthermore, according to the trigger-type liquid injector 201 of this embodiment, a recovery hole 283 is formed in the cylinder wall 282 of the accumulator 280. Therefore, for example, when the container 200A is inverted, liquid that has entered the accumulator 280 can be discharged through the recovery hole 283. Furthermore, when the container 200A is restored to an upright position after being inverted, even if liquid remains in the accumulator 280, air can be introduced into the container 200A through the recovery hole 283, and the residual liquid can be discharged into the container 200A through the lower opening of the accumulator 280 using air displacement. In this way, liquid accumulation in the accumulator 280 can be suppressed, facilitating smooth movement of the accumulator plunger 300.

[0206] While embodiments of the present invention have been described above, these embodiments are merely illustrative and not intended to limit the scope of the invention. The embodiments can be implemented in various other ways, and various omissions, substitutions, and modifications can be made without departing from the spirit of the invention. Embodiments and their variations may include, for example, content readily conceived by those skilled in the art, substantially the same content, or content of equivalent scope.

[0207] For example, in the above embodiment, the case where a cover 310 is provided in the nozzle portion 203 via a hinge portion has been described as an example. However, the cover 310 is not necessary and may not be provided. Furthermore, in this embodiment, the liquid may be sprayed out in various spray patterns, such as in a line or a mist, when it is sprayed from the spray hole 204. In addition, a pressure accumulator valve may be provided in the nozzle portion 203 to spray the liquid under pressure.

[0208] Industrial availability

[0209] According to the present invention, a trigger-type liquid injector capable of continuous spraying in both upright and inverted positions can be provided, and a trigger-type liquid injector capable of suppressing the tendency of the diameter of the mounting cap to become too large and capable of continuous spraying in both upright and inverted positions can also be provided.

Claims

1. A trigger-type liquid sprayer characterized by comprising: Possessing: an ejector main body which is mounted to a container body which accommodates a liquid; a nozzle member which is provided in front of the ejector main body and which is formed with an ejection hole which ejects the liquid in the front direction; and an upright-inverted adapter which is mounted to a lower end portion of the ejector main body, the ejector main body possesses: a longitudinal supply cylinder portion which extends in the up-down direction and which supplies the liquid which is sucked from inside the container body to flow; a trigger mechanism which has a trigger portion which is disposed in front of the longitudinal supply cylinder portion in a manner so as to be able to move in the rear direction in a state in which it is urged in the front direction, the trigger mechanism causing the liquid to flow toward the ejection hole by moving the trigger portion in the rear direction; an accumulation cylinder body which extends in the front-rear direction and which supplies the liquid to the inside by moving the trigger portion in the rear direction; and an accumulation plunger which is configured so as to be able to move in the rear direction inside the accumulation cylinder body in a state in which it is urged in the front direction as the liquid is supplied to the inside of the accumulation cylinder body, and which causes the liquid inside the accumulation cylinder body to flow toward the ejection hole, the upright-inverted adapter possesses: an adapter main body which forms a first space which communicates between the inside of the container body and the longitudinal supply cylinder portion, and a second space which communicates between the inside of the container body and the first space through an upright guide inlet, and a switching valve which, in a state in which the ejector main body is mounted to the container body, cuts off the communication between the first space and the second space when the container body is upright, and causes the first space and the second space to communicate when the container body is inverted, the longitudinal supply cylinder portion possesses: a first opposing wall which is disposed above the adapter main body, and a first fitting cylinder portion which penetrates the first opposing wall in the up-down direction, the adapter main body possesses: a second fitting cylinder portion which, inside the first fitting cylinder portion, is fitted all the way into a portion of the first fitting cylinder portion which is located further above than the first opposing wall through a lower end opening portion of the first fitting cylinder portion, and a second opposing wall which protrudes from a portion of the second fitting cylinder portion which is located further below than the first fitting cylinder portion to the radially outer side with respect to the up-down direction, and which opposes the first opposing wall in the up-down direction, in an upper surface of the second opposing wall, a portion of the second opposing wall which is located radially outward with respect to the first fitting cylinder portion is formed with a flat surface retreat portion which opens to the radially outer side around the first fitting cylinder portion.

2. The trigger type liquid ejector according to claim 1, wherein the accumulation cylinder body and the accumulation plunger are disposed above the longitudinal supply cylinder portion and between the longitudinal supply cylinder portion and the nozzle member. Possessing: an ejector main body which is mounted to a container body which accommodates a liquid via a mounting cap; and 3. A trigger liquid sprayer characterized by, a nozzle member which is mounted to the ejector main body and which is formed with an ejection hole which ejects the liquid, the ejector main body possesses: a longitudinal supply cylinder portion which sucks the liquid inside the container body; ​ ​ A trigger mechanism having a trigger portion disposed so as to be movable rearward in a state of being urged forward, the trigger mechanism causing liquid to flow from inside the longitudinal supply cylinder portion toward the ejection hole side by movement of the trigger portion rearward; A righting adapter disposed inside the mounting cap and disposed at a position lower than the longitudinal supply cylinder portion along the axis of the longitudinal supply cylinder portion and linked to the longitudinal supply cylinder portion; An accumulator cylinder body disposed inside the mounting cap and disposed lower than the righting adapter along the axis and linked to the righting adapter and extending in the up-down direction; and An accumulator plunger disposed inside the accumulator cylinder body so as to be movable downward in a state of being urged upward, The longitudinal supply cylinder portion has: A first flow path through which liquid flows toward the ejection hole side by movement of the trigger portion rearward; and A second flow path through which a portion of the liquid flowing in the first flow path flows toward the accumulator cylinder body side, The righting adapter has: An adapter main body that divides a first space that is communicated with the inside of the container body through a righting inlet and a second space that is communicated with the first space through an inverted inlet; A switching valve that cuts off communication between the first space and the second space when the container body is righted in a state in which the ejector main body is mounted to the container body and that communicates the first space and the second space when the container body is inverted; and A relay flow path that communicates the second flow path with the inside of the accumulator cylinder body.

4. The trigger type liquid ejector according to claim 3, wherein The longitudinal supply cylinder portion has: An outer cylinder that is mounted to the mouth portion of the container body by the mounting cap; and An inner cylinder that is fitted inside the outer cylinder, The first flow path is formed inside the inner cylinder, The second flow path is formed between the inner cylinder and the outer cylinder.

5. The trigger type liquid ejector according to claim 3 or 4, wherein The accumulator cylinder body is formed as a toped cylinder that is open downward, The accumulator plunger is moved downward from an uppermost position by liquid supplied into the accumulator cylinder body by movement of the trigger portion rearward, A recovery hole that communicates the inside of the accumulator cylinder body with the inside of the container body is formed in a portion of the cylinder wall of the accumulator cylinder body that is lower than the accumulator plunger when in the uppermost position. ​

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