JP6626724B2 - Trigger type liquid ejector - Google Patents

Description

  The present invention relates to a trigger type liquid ejector.

2. Description of the Related Art A trigger type liquid ejector that sucks up liquid from a container body and discharges the liquid from a nozzle by operating a trigger portion extending below a nozzle is known (for example, Patent Document 1 below).
In a conventional trigger-type liquid ejector, an injection cylinder that extends forward is provided above a vertical supply cylinder that communicates with a container body. A nozzle is attached to the tip of the injection cylinder. A cylinder that is operated by operating a trigger unit is disposed below the injection cylinder unit. By operating the trigger portion, the liquid can be sucked into the cylinder from the vertical supply cylinder portion, and the liquid can be ejected (spouted) forward from the ejection cylinder portion via the nozzle.

Japanese Patent No. 3781904

  However, in the above-mentioned conventional trigger type liquid ejector, liquid is ejected only when the trigger portion is pulled. Therefore, for example, when a liquid is sprayed on a large area, it is necessary to repeat the operation of pulling the trigger portion many times, which is troublesome.

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide a trigger type liquid ejector capable of continuously ejecting liquid.

In order to solve the above problems, the present invention proposes the following means.
The trigger type liquid ejector according to the present invention has an ejector body attached to a container body containing a liquid, and an ejection hole which is disposed on a front side of the ejector body and ejects the liquid forward. The ejector main body extends in the up-down direction, and is disposed in front of the vertical supply cylinder portion that sucks up liquid in the container body. An injection cylinder communicated with the inside of the vertical supply cylinder, and a trigger disposed movably rearward in a forward biased state in front of the vertical supply cylinder, and a rearward of the trigger. A trigger mechanism for causing the liquid to flow from the inside of the vertical supply cylinder to the ejection hole side through the inside of the injection cylinder by movement, the trigger type liquid ejector comprising: Liquid that has passed through the supply cylinder is supplied inside A storage cylinder, which is disposed in the storage cylinder so as to be movable in an axial direction along a central axis thereof, and moves toward one side in the axial direction with the supply of the liquid into the storage cylinder. A plunger, a plurality of negative pressure plungers connected to the storage plunger and linked to the axial movement of the storage plunger, extending along the axial direction, and the other end of the axial direction being closed and closed. A plurality of negative pressure plungers, each of which includes a plurality of negative pressure cylinders movably accommodated toward one side in the axial direction.

According to the present invention, when the trigger portion is pulled backward in a state where the trigger portion is attached to the container body in which the liquid is stored, the liquid that has passed through the vertical supply cylinder portion is ejected from the ejection hole through the ejection cylinder portion. At the same time, the liquid that has passed through the vertical supply cylinder is also introduced into the storage cylinder. When the liquid is introduced into the storage cylinder, the storage plunger in the storage cylinder moves along with the negative pressure plunger toward one side in the axial direction. At this time, a portion of the negative pressure cylinder located on the other side in the axial direction with respect to the negative pressure plunger is a first closed space. Therefore, when the negative pressure plunger moves to one side in the axial direction, the first closed space becomes negative pressure. This makes it possible to generate a biasing force toward the other side in the axial direction with respect to the negative pressure plunger and the storage plunger.
As described above, every time the operation of pulling the trigger portion is performed, the liquid can be accumulated (filled) in the storage cylinder by moving the storage plunger to one side in the axial direction while ejecting the liquid from the ejection hole.

Then, when the operation of pulling the trigger portion is stopped, the supply of the liquid from the vertical supply cylinder portion to the ejection hole is stopped, but the negative pressure in the negative pressure cylinder causes the negative pressure plunger and the storage plunger to move to the other side in the axial direction. Start restoring and moving together. Thus, the liquid filled in the storage cylinder can be pushed out from the storage cylinder toward the ejection hole, and can be continuously ejected from the ejection hole.
Therefore, the liquid can be ejected not only when the operation of pulling the trigger portion backward is performed but also when the trigger portion is not operated, and the continuous ejection of the liquid can be performed.

  In addition, when the storage plunger moves to the other side in the axial direction, if the trigger is not pulled again, the storage plunger moves to the other axial end of the storage cylinder. Can be repeated. In this case, the storage plunger repeatedly moves to one side in the axial direction and moves to the other side with a substantially constant width, and gradually moves to one side in the axial direction as a whole. Therefore, even in this case, the liquid can be gradually stored in the storage cylinder.

By the way, when the negative pressure plunger and the storage plunger are restored, the negative pressure in the negative pressure cylinder is used. Therefore, for example, the negative pressure can be reduced without using the urging force acting from another member such as the urging member. The plunger and the storage plunger can be restored and moved. Thereby, thrust can be applied to the negative pressure plunger and the storage plunger while simplifying the structure.
In addition, as a general urging member, for example, use of a metal spring or the like is conceivable, but by not using this kind of urging member, it is possible to form the trigger type liquid ejector with only a synthetic resin material. Become.

  In addition, since a plurality of negative pressure cylinders and negative pressure plungers are provided, it is possible to reduce the diameter of each negative pressure cylinder while securing thrust, and to reduce the size of the trigger type liquid ejector.

  The plurality of negative pressure cylinders may be arranged in series with each other in the axial direction.

  In this case, a plurality of negative pressure cylinders are arranged in series with each other in the axial direction. Therefore, by reducing the diameter of each of the negative pressure cylinders as described above, the projected area of the plurality of negative pressure cylinders in the axial direction can be reduced. Thereby, the size of the trigger type liquid ejector can be effectively reduced.

  The plurality of negative pressure cylinders may be arranged in series in the axial direction with respect to the storage cylinder.

  In this case, a plurality of negative pressure cylinders are arranged in series in the axial direction with respect to the storage cylinder. Therefore, by reducing the diameter of the series cylinder body formed by the storage cylinder and the plurality of negative pressure cylinders, the projected area of the series cylinder body in the axial direction can be reduced. Thereby, the size of the trigger type liquid ejector can be reduced more effectively.

  The storage cylinder and the plurality of negative pressure cylinders may be arranged coaxially with each other.

  In this case, the storage cylinder and the plurality of negative pressure cylinders are arranged coaxially with each other. Therefore, by reducing the diameter of the serial cylinder body, the size of the trigger type liquid ejector can be further effectively reduced.

  The maximum outer diameter of the storage cylinder and the maximum outer diameter of each of the plurality of negative pressure cylinders may be equal to each other.

  In this case, the maximum outer diameter of the storage cylinder and the maximum outer diameter of each of the plurality of negative pressure cylinders are equal to each other. Therefore, the internal volume of each of the storage cylinder and the plurality of negative pressure cylinders can be efficiently secured while reliably reducing the diameter of the serial cylinder body.

  According to the present invention, the liquid can be ejected not only when the operation of pulling the trigger portion backward but also when the trigger portion is not operated, and the continuous ejection of the liquid can be performed.

It is a longitudinal section showing a 1st embodiment of a trigger type liquid ejector concerning the present invention. FIG. 2 is an enlarged vertical sectional view of a main part including a storage cylinder constituting the trigger type liquid ejector shown in FIG. 1. FIG. 2 is a cross-sectional view of a vertical supply cylinder constituting the trigger type liquid ejector shown in FIG. 1, showing a state where a top wall is viewed from below. FIG. 3 is an enlarged vertical sectional view of a main part shown in FIG. 2, showing a state in which a storage plunger is retracted. FIG. 5 is an enlarged vertical sectional view of a main part shown in FIG. 4. It is a longitudinal section showing a 2nd embodiment of a trigger type liquid ejector concerning the present invention. FIG. 7 is an enlarged vertical sectional view of a main part including a storage cylinder constituting the trigger type liquid ejector shown in FIG. 6. FIG. 7 is a cross-sectional view of a vertical supply cylinder constituting the trigger type liquid ejector shown in FIG. 6, showing a state in which a top wall is viewed from below. FIG. 8 is an enlarged vertical sectional view of a main part shown in FIG. 7, showing a state in which a storage plunger is retracted.

(1st Embodiment)
Hereinafter, a first embodiment of a trigger type liquid ejector according to the present invention will be described with reference to FIGS. 1 to 5.
As shown in FIGS. 1 to 5, a trigger type liquid ejector 1 of the present embodiment is attached to a container body A containing a liquid and has an ejector main body 2 having a vertical supply cylinder portion 10 for sucking up a liquid, An ejection hole 4 for ejecting liquid toward the front is formed, and a nozzle member 3 attached to the ejector main body 2 is provided.
Each configuration of the trigger type liquid ejector 1 is a molded product using a synthetic resin unless otherwise specified.

  Here, in the present embodiment, the central axis of the vertical supply cylinder 10 is defined as the axis O1, and the container A side along the axis O1 is referred to as the lower side, and the opposite side is referred to as the upper side. One direction orthogonal to the axis O1 is referred to as a front-rear direction, and a direction orthogonal to both the axis O1 direction and the front-back direction is referred to as a left-right direction.

The ejector main body 2 includes the vertical supply cylinder 10 extending in the up-down direction, an injection cylinder 11 disposed in front of the vertical supply cylinder 10, and an inner side communicating with the inside of the vertical supply cylinder 10. It has. The ejector main body 2 includes a connection cylinder part 30, an obturator plug 31, a cylinder cylinder part 40, a storage cylinder 90, a negative pressure cylinder 93, a storage valve 32, a storage plunger 91, and a negative pressure plunger 94. , Is further provided.
In the front-back direction, the direction in which the injection cylinder 11 is located with respect to the vertical supply cylinder 10 is referred to as front or front, and the opposite direction is referred to as rear or rear.

The vertical supply cylinder portion 10 includes an outer cylinder 12 having a top cylindrical shape, and an inner cylinder 13 fitted in the outer cylinder 12.
The outer cylinder 12 includes a large-diameter portion 12a, a small-diameter portion 12b disposed above the large-diameter portion 12a, and having a smaller diameter than the large-diameter portion 12a, an upper end of the large-diameter portion 12a, and a lower-end portion of the small-diameter portion 12b. And a flange portion 12c for connecting the two, and is formed in a two-stage cylindrical shape whose diameter is reduced upward from below. The upper end opening of the small diameter portion 12b is closed by the top wall portion 12d. The top wall 12d is provided with a seal cylinder 12e and a regulating protrusion 12f. Each of the seal cylinder portion 12e and the regulating protrusion 12f extends downward from the top wall portion 12d and is arranged coaxially with the axis O1. The seal tube portion 12e surrounds the regulation protrusion 12f from the outside.

  The inner cylinder 13 includes a large-diameter portion 13a, a small-diameter portion 13b disposed above the large-diameter portion 13a and having a smaller diameter than the large-diameter portion 13a, an upper end of the large-diameter portion 13a, and a lower-end portion of the small-diameter portion 13b. And a flange portion 13c for connecting the upper portion and the lower portion, and is formed in a two-stage cylindrical shape whose diameter is reduced upward from below. The seal tube portion 12e is fitted in the upper end of the small diameter portion 13b.

An upper part of a pipe 15 which is disposed in the container A and has a lower end opening at the bottom (not shown) of the container A is fitted in the small diameter portion 13b of the inner cylinder 13. The flange portion 13c of the inner cylinder 13 is located below the flange portion 12c of the outer cylinder 12 in a state where a gap S1 is secured between the flange portion 13c of the inner cylinder 13 and the flange portion 12c of the outer cylinder 12. In the large-diameter portion 13a of the inner cylinder 13, a portion protruding downward from the large-diameter portion 12a of the outer cylinder 12 is formed with an annular flange portion 13d that protrudes outward in the radial direction. The flange 13d is provided in the upper end of the mounting cap 14 mounted (for example, screwed) on the mouth A1 of the container A, and locks the upper end of the mounting cap 14 so as to be rotatable around its axis. The flange 13d is vertically sandwiched between the mounting cap 14 and the upper edge of the opening A1 of the container A.
Note that the axis O1 of the vertical supply cylinder portion 10 composed of the outer cylinder 12 and the inner cylinder 13 is eccentric to the rear with respect to the container axis of the container A.

An annular tapered cylindrical portion 35 protruding inward is formed on a portion of the inner peripheral surface of the inner cylinder 13 that is located below the seal cylinder portion 12 e and above the upper end of the pipe 15. ing.
The diameter of the tapered tube portion 35 gradually decreases as it goes downward. Inside the tapered tube portion 35, a spherical suction valve 36 that is separably seated on the inner peripheral surface of the tapered tube portion 35 is disposed. The suction valve 36 communicates and blocks a space located above the tapered tube 35 and a space located below the tapered tube 35 in the inner tube 13.

The connection cylinder 30 extends forward from the vertical supply cylinder 10. The connection cylinder 30 communicates with the inside of the vertical supply cylinder 10. The rear end of the connection cylinder 30 is connected to the front side of the upper end of the vertical supply cylinder 10. The rear end opening of the connection cylinder 30 opens into the seal cylinder 12e.
The closing plug 31 closes the opening at the front end of the connection tube 30. The closing plug 31 is tightly fitted in the connection tube 30. The plug 31 is provided with a protrusion 34 protruding rearward. The protruding portion 34 reduces the cross-sectional area of the flow path of the connection cylinder 30.

  The cylinder tube portion 40 is formed integrally with a portion of the outer tube 12 located below the connection tube portion 30. The cylinder section 40 protrudes forward from the outer cylinder 12 and opens forward. The cylinder tube portion 40 is disposed between the connection tube portion 30 and the flange portion 12c. The cylinder tube portion 40 is arranged in parallel with the connection tube portion 30 and the flange portion 12c in the vertical direction. The cylinder tube portion 40 includes partitions W1 and W2 that are common to the connection tube portion 30 and the flange portion 12c, respectively.

  The storage cylinder 90 is provided with a supply hole 95 a communicating with the inside of the connection cylinder 30. The liquid that has passed through the vertical supply tube portion 10 and the connection tube portion 30 is supplied into the storage cylinder 90 through the supply hole 95a by the swinging (moving) of the trigger portion 51 described later rearward. The storage cylinder 90 extends in the front-rear direction and is disposed above the connection cylinder 30. The connection cylinder part 30 and the storage cylinder 90 are arranged in parallel in the up-down direction and have a common partition wall W3. The storage cylinder 90 is arranged in parallel with the connection cylinder 30 and the cylinder cylinder 40. In the illustrated example, the storage cylinder 90 is also arranged on the vertical supply cylinder 10. The vertical supply cylinder part 10 and the storage cylinder 90 have a common partition wall W4. The partition W4 is formed by the top wall 12d.

As shown in FIGS. 2 to 5, the storage cylinder 90 includes a front wall portion 95 and a cylinder tube 96 extending rearward from the front wall portion 95, and is formed in a tubular shape that opens rearward. I have.
The mounting recess 97 and the communication hole 104 are provided in the front wall 95. The mounting recess 97 is formed in an annular shape coaxial with the central axis O2 of the storage cylinder 90. The mounting recess 97 is formed on the rear end surface of the front wall 95. The communication hole 104 is disposed inside the mounting concave portion 97 when the front wall portion 95 is viewed from the front and rear directions. The communication hole 104 passes through the front wall 95 in the front-rear direction.

  The cylinder cylinder 96 is formed in a multistage cylindrical shape whose diameter gradually increases from the front side to the rear side. The cylinder tube 96 includes a small-diameter front cylinder portion 112 and a large-diameter rear cylinder portion 113. The rear cylinder part 113 forms the maximum outer diameter part of the storage cylinder 90. The rear cylinder 113 projects rearward from the vertical supply cylinder 10. The front cylinder portion 112 constitutes the partition wall W3. The rear end of the front cylinder 112 and the front end of the rear cylinder 113 constitute the partition wall W4.

  The supply hole 95a, the communication groove 115, and the recovery hole 116 are formed in the cylinder tube 96. The supply hole 95a is provided at the front end of the front cylinder 112. The supply hole 95a vertically penetrates the partition wall W3. The supply hole 95a exposes the protrusion 34 upward. The communication groove 115 is provided at the rear end of the front cylinder 112. The communication groove 115 is provided on the inner peripheral surface of the front cylinder 112. The communication groove 115 extends in the front-rear direction and opens rearward. A plurality of communication grooves 115 are arranged at intervals around the central axis O2. The collection hole 116 is arranged at the front end of the rear cylinder 113. The recovery hole 116 penetrates the partition wall W4 in the vertical direction. The recovery hole 116 communicates with a recovery passage 117 provided in the ejector main body 2. As shown in FIG. 1, the recovery passage 117 vertically cuts the vertical supply cylinder 10 in the vertical direction. The recovery passage 117 penetrates the small diameter portion 13b in the vertical direction and communicates with the inside of the large diameter portion 13a. The collection passage 117 communicates the collection hole 116 with the inside of the container A.

  As shown in FIGS. 2 to 5, the negative pressure cylinder 93 extends in the front-rear direction and has a front end opening (the other end opening in the axial direction) closed. A plurality of (three in the illustrated example) negative pressure cylinders 93 are arranged in series in the front-rear direction. The plurality of negative pressure cylinders 93 are arranged in series with respect to the storage cylinder 90 in the front-rear direction. The plurality of negative pressure cylinders 93 have the same shape and the same size. The plurality of negative pressure cylinders 93 are arranged coaxially with the central axis O2. Negative pressure cylinders 93 adjacent in the front-rear direction are directly connected to each other.

  Each negative pressure cylinder 93 includes a multi-stage cylindrical peripheral wall portion 130 extending in the front-rear direction, and an end wall portion 131 for closing a front end opening of the peripheral wall portion 130. The peripheral wall portion 130 includes a small-diameter cylindrical portion 132 located on the front side and a large-diameter cylindrical portion 133 located on the rear side. The large-diameter cylindrical portion 133 has a larger diameter than the small-diameter cylindrical portion 132 and forms a maximum outer diameter portion of the negative pressure cylinder 93. The outer diameter and the inner diameter of the large-diameter cylindrical part 133 are equal to the outer diameter and the inner diameter of the rear cylindrical part 113, respectively. The large-diameter cylindrical portion 133 is longer in the front-rear direction than the small-diameter cylindrical portion 132.

  The small-diameter cylindrical portion 132 is fitted into one large-diameter cylindrical portion 133 of another negative-pressure cylinder 93 adjacent to the one negative-pressure cylinder 93 having the small-diameter cylindrical portion 132 from the front side. Among the plurality of negative pressure cylinders 93, the small-diameter cylindrical portion 132 of the negative pressure cylinder 93 located on the foremost side is fitted in the rear cylindrical portion 113.

  A guide hole 134 is provided in the end wall 131. The guide hole 134 penetrates the end wall 131 in the front-rear direction. In the present embodiment, the end wall portion 131 is further provided with a guide cylinder 135 projecting forward, and the guide hole 134 is formed by the inside of the guide cylinder 135.

  The storage cylinder 90 and the plurality of negative pressure cylinders 93 are arranged coaxially with each other. The maximum outer diameter of the storage cylinder 90 and the maximum outer diameter of each of the plurality of negative pressure cylinders 93 are equal to each other. The storage cylinder 90 and the plurality of negative pressure cylinders 93 form a series cylinder body 98 extending in the front-rear direction. The maximum outer diameter portion of the series cylinder body 98 is formed by the maximum outer diameter portion of the storage cylinder 90 and the maximum outer diameter portion of each of the plurality of negative pressure cylinders 93. The maximum outer diameter portion of the serial cylinder body 98 is formed by the rear cylinder portion 113 and the large diameter cylinder portion 133, and extends continuously in the front-rear direction.

  Between the storage cylinder 90 and the negative pressure cylinder 93 that are adjacent in the front-rear direction, and between the negative pressure cylinders 93 that are adjacent in the front-rear direction, open paths 99 that communicate the inside and the outside of the series cylinder body 98 are provided. Is formed. The open path 99 connects the inside and the outside of the storage cylinder 90 or the inside and the outside of the negative pressure cylinder 93.

  The storage valve 32 allows the supply of the liquid from the inside of the connection cylinder 30 through the supply hole 95 a to the inside of the storage cylinder 90. The storage valve 32 regulates outflow of the liquid from the storage cylinder 90 through the supply hole 95a into the connection cylinder 30. The storage valve 32 is a check valve. The storage valve 32 includes a valve base 118 and a valve body 119. The valve base 118 is formed in an annular shape coaxial with the central axis O2. The valve base 118 is disposed on the rear end face of the front wall 95. The valve base 118 has a mounting projection 120 mounted in the mounting recess 97. The valve body 119 is formed in a cylindrical shape that projects rearward from the valve base 118. The valve body 119 is elastically deformable radially inward of the valve body 119. The rear end of the valve body 119 is separably seated on the inner peripheral surface of the cylinder cylinder 96. The rear end of the valve body 119 is located behind the supply hole 95a. The valve body 119 closes the supply hole 95 a so that it can be opened and closed from the inside of the storage cylinder 90.

  The storage plunger 91 is disposed in the storage cylinder 90 so as to be movable in the front-rear direction (axial direction) along the central axis O2. The storage plunger 91 moves toward the rear side (one side) in the front-rear direction with the supply of the liquid into the storage cylinder 90 and is urged toward the front side (the other side). The storage plunger 91 includes a sliding member 121 and a connecting shaft 122.

  The sliding member 121 is formed in a tubular shape extending in the front-rear direction. The sliding member 121 is arranged coaxially with the central axis O2. The sliding member 121 slides in the storage cylinder 90 in the front-rear direction. The sliding member 121 includes a plunger cylinder 110 that extends in the front-rear direction, and a closing wall 111 that closes a front end opening of the plunger cylinder 110.

  The plunger cylinder 110 is formed in a multistage cylindrical shape whose diameter gradually increases from the front side to the rear side. Lip portions 124 and 125 are provided on the outer peripheral surface of the plunger cylinder 110. The lip portions 124 and 125 are formed over the entire circumference of the plunger cylinder 110 in the circumferential direction. The lip portions 124 and 125 slide densely on the inner peripheral surface of the cylinder tube 96 in the front-rear direction. The lip portions 124 and 125 are arranged in a pair at an interval in the front-rear direction. The lip portions 124 and 125 include a first lip portion 124 on the front side and a second lip portion 125 on the rear side. The first lip portion 124 slides on the inner peripheral surface of the front cylinder portion 112. The second lip portion 125 slides on the inner peripheral surface of the rear cylinder portion 113.

  The front end face of the closing wall 111 is in contact with the rear end face of the valve base 118. Thus, the closing wall 111 closes the communication hole 104. The closing wall 111 is separably seated on the valve base 118 toward the rear side. On the front end face of the closing wall 111, a convex portion 126 and a concave groove 127 are formed. The projection 126 projects forward from the closing wall 111. The protrusion 126 is arranged in the valve base 118. The concave groove 127 extends in the radial direction of the storage plunger 91. The concave groove 127 is open outward in the radial direction. With the front end surface of the closing wall 111 in contact with the rear end surface of the valve base 118, communication between the concave groove 127 and the communication hole 104 is blocked.

  The connection shaft portion 122 is formed in a shaft shape extending in the front-rear direction. The connecting shaft 122 is arranged coaxially with the sliding member 121. The connecting shaft 122 extends rearward from the closing wall 111. The connecting shaft 122 is formed integrally with the sliding member 121. A first concave portion 139 that is depressed forward is provided on the rear end surface of the connecting shaft portion 122.

  The negative pressure plunger 94 is connected to the storage plunger 91 and is linked to the movement of the storage plunger 91 in the front-rear direction. A plurality of negative pressure plungers 94 are provided corresponding to the negative pressure cylinder 93, and three negative pressure plungers are provided in the illustrated example. The negative pressure plungers 94 are housed one by one in a plurality of negative pressure cylinders 93. The negative pressure plunger 94 is housed in the negative pressure cylinder 93 movably toward the rear side in the front-rear direction (one side in the axial direction).

  Each negative pressure plunger 94 includes a shaft 138 and a slide 137. The shaft body 138 is slidably fitted in the guide holes 134 of the plurality of negative pressure cylinders 93 in the front-rear direction. The shaft 138 is shorter in the front-rear direction than the connecting shaft 122. The sliding body 137 is formed in an annular shape coaxial with the central axis O2, and protrudes from the shaft body 138 to the outside in the radial direction of the shaft body 138. The outer peripheral edge of the sliding body 137 is in contact with the inner peripheral surface of the large-diameter cylindrical portion 133 so as to be slidable in the front-rear direction.

  The shaft body 138 includes a shaft main body 140 and a fitting protrusion 141. The outer diameter of the shaft main body 140 is equal to the outer diameter of the connecting shaft portion 122. On the rear end surface of the shaft main body 140, a second concave portion 142 that is depressed forward is provided. The second recess 142 has the same diameter as the first recess 139.

  The fitting projection 141 projects forward from the shaft main body 140. The fitting protrusion 141 has a smaller diameter than the shaft main body 140. The fitting protrusion 141 has the same diameter as the first recess 139 and the second recess 142. The fitting protrusion 141 is fitted in the first recess 139 or the second recess 142. Among the plurality of negative pressure plungers 94, the fitting convex portion 141 of the negative pressure plunger 94 located on the foremost side is fitted in the first concave portion 139, and the fitting convex portions 141 of the other negative pressure plungers 94 are It is fitted in the second recess 142. In the negative pressure plungers 94 adjacent in the front-rear direction, the front end surface of the shaft body 140 of the negative pressure plunger 94 located on the rear side is in contact with the rear end face of the shaft body 140 of the negative pressure plunger 94 located on the front side. .

  The shaft body 138 has a through passage 143 extending in the front-rear direction. The through passage 143 is arranged coaxially with the central axis O2. Each through passage 143 of the plurality of negative pressure plungers 94 communicates with each other. The plurality of through paths 143 form a communication path 144 extending continuously in the front-rear direction.

  The rear end opening of the communication passage 144 is closed by the plug member 150. The plug member 150 includes a fitting part 151 and a support part 152. The fitting portion 151 is fitted in the second concave portion 142 of the rearmost negative pressure plunger 94 of the plurality of negative pressure plungers 94. The support part 152 protrudes from the fitting part 151 in the radial direction of the fitting part 151. The support part 152 supports the sliding body 137 of the rearmost negative pressure plunger 94 among the plurality of negative pressure plungers 94 from the rear side. The fitting part 151 and the support part 152 are formed integrally.

  As shown in FIGS. 1 and 2, in a state where the front end face of the closing wall 111 is in contact with the rear end face of the valve base 118, the front end face of the sliding body 137 of each negative pressure plunger 94 is located behind the end wall 131. It is in contact with the end face. As shown in FIGS. 4 and 5, when the front end surface of the closing wall 111 is separated rearward from the rear end surface of the valve base 118, a gap between the front end surface of the slide 137 and the rear end surface of the end wall portion 131 is generated. A first closed space K1 that is made negative pressure is formed.

  In addition, a communication opening 145 that communicates with the first closed space K1 is formed in each negative pressure plunger 94. A plurality of communication openings 145 are provided at the rear end of the shaft main body 140 at intervals in the circumferential direction of the shaft main body 140. The communication opening 145 extends from the outer peripheral surface of the shaft body 140 toward the radial inside of the shaft body 140. The opening inside the communication opening 145 in the radial direction is open on the inner peripheral surface of the second recess 142. The opening is tightly closed by the fitting protrusion 141 or the fitting portion 151. The communication opening 145 discharges the air in the second recess 142 to the outside when the fitting protrusion 141 or the fitting portion 151 is fitted into the second recess 142.

  As shown in FIGS. 1 and 2, the injection cylinder 11 guides the liquid in the vertical supply cylinder 10 to the ejection holes 4. The injection cylinder 11 extends forward from the storage cylinder 90. The injection cylinder 11 protrudes forward from the front wall 95. The inside of the injection cylinder 11 is communicated with the inside of the injection cylinder 11 through the communication hole 104, the valve base 118, the storage cylinder 90, the supply hole 95 a and the connection cylinder 30.

  As shown in FIG. 1, the ejector main body 2 extends downward from the injection cylinder portion 11, and is disposed in front of the vertical supply cylinder portion 10 so as to be swingable (movable) rearward in a forward biased state. A trigger part 51, a main piston 52 that moves in the front-rear direction in conjunction with the swinging (movement) of the trigger part 51, a main cylinder 53 that pressurizes and depressurizes the inside with the movement of the main piston 52, It further includes an elastic plate portion 54 for urging the front portion 51 forward, and a cover body 55 that covers the entire vertical supply cylinder portion 10, the injection cylinder portion 11, and the storage cylinder 90 from at least the upper side and the left and right directions.

  The storage valve 32, the suction valve 36, the trigger portion 51, the main piston 52, the main cylinder 53, and the elastic plate portion 54 pivotally move (move) the trigger portion 51 rearward to supply liquid to the vertical supply cylinder portion. A trigger mechanism 50 for flowing from inside 10 to the ejection hole 4 side through the inside of the injection cylinder portion 11 is configured.

  The inside of the main cylinder 53 communicates with the inside of the vertical supply cylinder 10. The main cylinder 53 is provided with an outer cylinder portion 60 opening forward, a rear wall portion 61 closing a rear opening portion of the outer cylinder portion 60, and a main cylinder 53 projecting forward from a central portion of the rear wall portion 61. A piston guide 62 whose front end is closed. The closing plug 31 is formed integrally with the main cylinder 53.

The inside of the piston guide 62 is opened rearward, and a fitting projection 41 projecting forward from a rear wall (small-diameter portion 12b of the outer cylinder 12) of the cylinder cylinder 40 is provided in the opening. Mated.
The outer cylinder 60 is fitted inside the cylinder cylinder 40. The inner peripheral surface of the cylinder tube portion 40 and the outer peripheral surface of the outer tube portion 60 are in close contact at both ends in the front-rear direction. On the other hand, between the inner peripheral surface of the cylinder tube portion 40 and the outer peripheral surface of the outer cylinder portion 60, an annular gap S2 is secured at an intermediate portion located between both ends in the front-rear direction. .

  A first ventilation hole 63 is formed in the outer cylinder part 60 to allow the inside of the outer cylinder part 60 to communicate with the gap S2. A second ventilation hole 64 for communicating the gap S2 and the gap S1 defined between the flange 12c of the outer cylinder 12 and the flange 13c of the inner cylinder 13 in the flange 12c of the outer cylinder 12. Is formed. Further, a third ventilation hole 65 is formed in the flange portion 13c of the inner cylinder 13 to allow the gap S1 to communicate with the large diameter portion 13a of the inner cylinder 13 and the inside of the mounting cap 14.

A first through hole 66 penetrating in the front-rear direction is formed in a portion of the rear wall 61 of the main cylinder 53 located above the piston guide 62. In the illustrated example, a cylindrical portion projecting rearward is formed on the periphery of the opening of the first through hole 66 in the rear wall portion 61, and this cylindrical portion is formed on the small diameter portion 12 b of the outer cylinder 12. In the through hole. The first through hole 66 is formed in the inner cylinder 13 through the second through hole 67 formed in the inner cylinder 13 of the vertical supply cylinder 10 to a space located between the seal cylinder 12 e and the suction valve 36. Communicating.
Thereby, the inside of the main cylinder 53 communicates with the space located between the seal cylinder portion 12 e and the suction valve 36 in the inner cylinder 13 through the first through hole 66 and the second through hole 67. . Therefore, the suction valve 36 switches the communication between the inside of the container body A and the inside of the main cylinder 53 and the cutoff thereof.

The main piston 52 includes a columnar connecting portion 70 connected to the trigger portion 51, and a piston cylinder 71 located behind the connecting portion 70 and having a larger diameter than the connecting portion 70. It is formed in a tubular shape that opens rearward.
The main cylinder 53 and the main piston 52 are arranged on a common axis (not shown) extending in the front-rear direction.

  The piston cylinder 71 is opened rearward and has a piston body 72 into which a piston guide 62 is inserted. The piston cylinder 71 projects radially outward from a rear end of the piston body 72 and has an outer cylinder. A sliding cylinder portion 73 that comes into sliding contact with the inner peripheral surface of the portion 60 in a dense manner.

The piston body 72 has an inner diameter larger than the outer diameter of the piston guide 62. In the illustrated example, there is a slight gap between the inner peripheral surface of the piston main body 72 and the outer peripheral surface of the piston guide 62.
The sliding cylinder portion 73 is formed in a tapered shape that gradually increases in diameter from the center in the front-rear direction toward the front and the rear. The sliding contact portions 73 a located at both ends in the front-rear direction are formed on the inner periphery of the outer cylinder portion 60. Sliding contact with the surface.

  The connecting portion 70 of the main piston 52 is connected to the trigger portion 51 via a connecting shaft 86 described later. As a result, the main piston 52 is urged forward by the urging force of the elastic plate portion 54 together with the trigger portion 51, and moves rearward with the rearward movement of the trigger portion 51 to move into the main cylinder 53. Pushed.

  Further, when the trigger portion 51 is at the foremost swing position (the foremost movement position), the sliding cylinder portion 73 of the main piston 52 closes the first ventilation hole 63. Then, when the main piston 52 moves backward by a predetermined amount due to the swinging of the trigger portion 51 backward, the sliding cylinder portion 73 opens the first ventilation hole 63. Thus, the inside of the container body A communicates with the outside through the third ventilation hole 65, the second ventilation hole 64, and the first ventilation hole 63.

  The trigger portion 51 includes a main plate member 80 having a front surface curved concavely rearward in a side view when viewed from the left and right, and a pair of side plate members 81 standing rearward from left and right side edges of the main plate member 80. And

At the upper ends of the pair of side plate members 81, a pair of connecting plates 82 extending upward to the side of the injection cylinder 11 and sandwiching the injection cylinder 11 from the left and right are formed. The pair of connecting plates 82 is provided with a rotation shaft 83 projecting outward in the left-right direction. These rotary shafts 83 are rotatably supported by bearings provided on an upper plate member 84 that covers the upper part of the injection cylinder 11. The upper plate member 84 is disposed on the injection cylinder 11 via a mounting cylinder 92 described later.
Thus, the trigger portion 51 can swing in the front-rear direction about the rotation shaft portion 83.

The trigger portion 51 has an opening 51a penetrating the main plate member 80 in the front-rear direction, and a connecting cylinder 85 extending rearward from a peripheral edge of the opening 51a.
A pair of connecting shafts 86 protruding toward the inside of the connecting tube 85 along the left-right direction is formed at a portion located on the rear side of the inner peripheral surface of the connecting tube 85. These connection shafts 86 are inserted into connection holes formed in the connection portion 70 of the main piston 52. Thus, the trigger portion 51 and the main piston 52 are connected to each other.

  The connecting portion 70 of the main piston 52 is rotatable around the axis with respect to the connecting shaft 86 and is connected so as to be movable by a predetermined amount in the vertical direction. Thereby, the main piston 52 can be moved back and forth with the swing of the trigger portion 51 in the front and rear direction.

The upper plate member 84 in the form of a horizontal plate connected to the top wall 12 d of the outer cylinder 12 of the vertical supply cylinder 10 is attached to the upper surface of the injection cylinder 11.
The left and right sides of the upper plate member 84 are integrally formed with the elastic plate portions 54 which are formed in an arc shape convex forward in a side view as viewed from the right and left and extend below the injection cylinder 11 respectively. I have. The elastic plate portion 54 is formed in a circular arc shape concentric with each other in a side view as viewed from the left and right directions, and includes a pair of leaf springs arranged in front and rear.

Of the pair of leaf springs, the leaf spring located on the front side is the main leaf spring 54a, and the leaf spring located on the rear side is the sub leaf spring 54b.
The lower ends of the main leaf spring 54a and the sub leaf spring 54b are integrally connected via an arc-shaped folded portion 54c. A locking piece 54d protrudes downward from the folded portion 54c. The locking piece 54d is inserted from above into and engaged with a pocket 81a formed in the side plate member 81 of the trigger portion 51. ing.
Thereby, the elastic plate portion 54 urges the trigger portion 51 forward through the locking piece 54d and the pocket portion 81a.

The upper end portion of the main plate member 80 of the trigger portion 51 is in contact with the lower end portion of the later-described regulating wall 123 from behind by the bias of the elastic plate portion 54. Thereby, the trigger portion 51 is positioned at the foremost swing position.
When the trigger portion 51 is pulled rearward from the foremost swing position, the elastic plate portion 54 is elastically deformed so as to move the folded portion 54c rearward via the locking piece 54d. At this time, the sub-plate spring 54b of the elastic plate portion 54 is elastically deformed more largely than the main plate spring 54a.

  Even when the trigger portion 51 is pulled rearward, the locking piece 54d keeps coming out of the pocket portion 81a and moving the trigger portion 51 to the rearmost swing position (rearmost movement position). The engagement state with the pocket portion 81a is maintained.

  The nozzle member 3 is arranged on the front side of the ejector main body 2. The nozzle member 3 includes a nozzle plate 105, a mounting cylinder 92, a regulating wall 123, an insertion portion 201, a nozzle shaft 100, and a surrounding cylinder 101.

  The front and back surfaces of the nozzle plate 105 face the front-back direction. The nozzle plate 105 covers the front end opening of the injection cylinder 11 from the front. The nozzle plate 105 is arranged at the opening edge of the front end of the injection cylinder 11. The mounting cylinder 92 protrudes rearward from the nozzle plate 105. The mounting cylinder 92 is closely fitted to the injection cylinder 11. A connection hole 106 is formed in the nozzle plate 105. The connection hole 106 is arranged inside the mounting cylinder 92 when the nozzle plate 105 is viewed from the front and rear in a plan view. The restriction wall 123 is provided so as to project downward from the mounting cylinder 92. When the lower end of the regulating wall 123 abuts on the upper end of the main plate member 80 of the trigger portion 51 from the front, the regulating wall 123 positions the trigger portion 51 at the foremost swing position.

  The insertion portion 201 extends rearward. The insertion portion 201 is inserted over substantially the entire length in the front-rear direction in the injection cylinder portion 11. The insertion portion 201 is inserted into the injection cylinder 11 so as to secure a small gap S3 in the upper part of the internal space of the injection cylinder 11. Thereby, the volume of space in the injection cylinder 11 can be reduced. The gap S3 communicates with the connection hole 106.

The nozzle shaft 100 and the surrounding cylinder 101 project forward from the nozzle plate 105. The surrounding cylinder 101 surrounds the nozzle shaft 100 from outside. The surrounding cylinder 101 slightly protrudes forward from the nozzle shaft 100. An annular flow passage 102 is formed between the nozzle shaft 100 and the surrounding cylinder 101. The nozzle shaft portion 100 is provided with a nozzle cap 103 having an ejection hole 4 opening forward, and the communication passage 102 and the ejection hole 4 communicate with each other. The flow passage 102 communicates with the connection hole 106.
Thus, the inside of the storage cylinder 90 communicates with the ejection hole 4 through the communication hole 104, the inside of the injection cylinder 11, the connection hole 106, and the flow passage 102. That is, the communication hole 104 communicates the inside of the storage cylinder 90 with the ejection hole 4.

  Note that the position of the storage plunger 91 when the front end surface of the closing wall 111 is in contact with the rear end surface of the valve base 118 as shown in FIG. When the storage plunger 91 is located at the most advanced position, almost no liquid is stored in the storage cylinder 90 and the communication between the storage cylinder 90 and the communication hole 104 is blocked.

  When the storage plunger 91 moves rearward (one side in the axial direction), and, for example, the storage plunger 91 abuts on the negative pressure cylinder 93 from the front side (the other side in the axial direction), the storage plunger 91 is moved further. Movement toward the rear side is restricted. The position of the storage plunger 91 at this time is defined as the last retreat position. When the storage plunger 91 has reached the rearmost position, the maximum amount of liquid is stored in the storage cylinder 90.

(Operation of trigger type liquid ejector)
Next, a case where the trigger type liquid ejector 1 configured as described above is used will be described.
In addition, it is assumed that each part of the trigger-type liquid ejector 1 is filled with the liquid by a plurality of operations of the trigger part 51, and the liquid can be sucked up from the vertical supply cylinder part 10.

  When the trigger portion 51 is pulled backward against the urging force of the elastic plate portion 54, the main piston 52 retreats with the rearward movement of the trigger portion 51, so that the liquid in the main cylinder 53 is supplied to the first through hole 66. And it can be introduced into the inner cylinder 13 of the vertical supply cylinder part 10 through the second through hole 67. Then, the liquid introduced into the inner cylinder 13 pushes down the suction valve 36 to close the valve, and is supplied to the supply hole 95a through the connection cylinder 30 to push up the storage valve 32 to open it. Thereby, the liquid can be introduced into the storage cylinder 90. Then, the storage plunger 91 can be moved backward from the most advanced position, and the communication hole 104 can be opened by separating the front end face of the closing wall 111 from the rear end face of the valve base 118.

  Therefore, the liquid can be guided to the ejection hole 4 through the communication hole 104, the inside of the injection cylinder 11, and the flow passage 102, and the liquid can be ejected forward from the ejection hole 4, and at the same time, the storage plunger 91 is moved backward. Can be moved toward.

In this manner, every time the operation of pulling the trigger portion 51 backward is performed, the liquid can be ejected from the ejection hole 4 and the storage plunger 91 is moved backward to store the liquid in the storage cylinder 90 (filling). can do. At this time, as shown in FIG. 4, the liquid is stored in a storage space K2 in the storage cylinder 90.
With the introduction of the liquid into the storage cylinder 90, the storage plunger 91 in the storage cylinder 90 moves rearward (one side in the axial direction) together with the negative pressure plunger 94. As a result, the first closed space K1 becomes negative pressure in each negative pressure cylinder 93, and an urging force acts on the negative pressure plunger 94 and the storage plunger 91 toward the front side.

  In the storage cylinder 90, the first open space K3 located on the opposite side of the storage space K2 with the storage plunger 91 interposed therebetween communicates with the outside through the open path 99. In the negative pressure cylinder 93, a second open space K4 located on the opposite side of the first closed space K1 with the negative pressure plunger 94 interposed therebetween also communicates with the outside through the open path 99. The air in the first open space K3 and the air in the second open space K4 are discharged to the outside through the open passage 99 as the storage plunger 91 and the negative pressure plunger 94 move rearward.

When the operation of pulling the trigger portion 51 is stopped and the trigger portion 51 is released, the trigger portion 51 is urged forward by the elastic restoring force of the elastic plate portion 54 and returns to the original position. The main piston 52 moves forward. Therefore, a negative pressure is generated in the main cylinder 53, and the liquid in the container A can be sucked into the vertical supply cylinder 10 through the pipe 15 by the negative pressure.
Then, the newly sucked-up liquid pushes up the suction valve 36 to open the valve and is introduced into the main cylinder 53. This makes it possible to prepare for the next injection. Note that the storage valve 32 is closed.

At this time, although the supply of the liquid from the connection cylinder 30 to the storage cylinder 90 is stopped, the negative pressure in the first closed space K1 causes the negative pressure plunger 94 and the storage plunger 91 to move forward toward the most advanced position ( (Restoring movement toward the other side in the axial direction). At this time, the outflow of the liquid from the storage cylinder 90 to the connection cylinder 30 is regulated by the storage valve 32. Thus, the liquid accumulated in the storage cylinder 90 can be guided to the ejection hole 4 through the communication hole 104, the inside of the injection cylinder 11, and the flow passage 102, and the liquid can be ejected forward through the ejection hole 4.
As described above, the liquid can be ejected not only when the operation of pulling the trigger unit 51 backward but also when the trigger unit 51 is not operated, and the continuous ejection of the liquid can be performed.

  In particular, a communication hole 104 communicating with the ejection hole 4 and a supply hole 95a communicating with the inside of the injection cylinder portion 11 are respectively formed in the storage cylinder 90, and the storage plunger 91 directly closes the communication hole 104. Therefore, the spatial volume (the internal volume occupied by the path) of the path from the connecting cylinder 30 to the storage cylinder 90 can be easily reduced with few restrictions. Therefore, when the trigger portion 51 is operated, the liquid can be immediately introduced into the storage cylinder 90 from the connection tube portion 30, and the pressure in the storage cylinder 90 is quickly increased, and the storage plunger 91 is immediately moved backward. Easy to do. Therefore, the liquid can be quickly ejected while suppressing the number of times of priming. Therefore, it is easy to use and excellent in operability.

  Further, since the space volume in the injection cylinder 11 is reduced by the insertion portion 201, the pressure in the injection cylinder 11 can be quickly increased, and the liquid can be ejected at a high ejection pressure.

Further, since the storage plunger 91 directly closes the communication hole 104, the liquid is not injected unless the internal pressure of the storage cylinder 90 exceeds a predetermined value. Therefore, the liquid can be ejected at an appropriate pressure (ejection pressure) without separately providing a high-pressure valve or the like, and the configuration can be easily simplified. Moreover, since the pressure can be accumulated by moving the storage plunger 91, which is urged forward by the negative pressure of the first closed space K1, backward, the liquid can be ejected in a state where the pressure is further applied to the liquid. .
In addition, it is possible to effectively prevent the liquid from leaking from the ejection holes 4 when not in use.

When the storage plunger 91 moves forward, the storage plunger 91 moves to the most advanced position (the other axial end of the storage cylinder 90) unless the operation of pulling the trigger portion 51 is performed again. May be repeated.
In this case, the storage plunger 91 gradually moves backward as a whole while repeating retreat and advance. Thus, the liquid can be gradually stored in the storage cylinder 90. Then, by moving the storage plunger 91 to, for example, the last retreat position, the liquid can be continuously ejected for a long time until the storage plunger 91 moves from the last retreat position to the most advanced position.

  When the storage plunger 91 is located at the rearmost position, the first lip portion 124 is located on the communication groove 115. At this time, the inside of the front cylinder portion 112 communicates with the collection hole 116 through the communication groove 115, and the inside of the storage cylinder 90 and the inside of the container body A communicate with each other through the collection hole 116 and the collection passage 117.

As described above, according to the trigger type liquid ejector 1 according to the present embodiment, the negative pressure in the negative pressure cylinder 93 is used when the negative pressure plunger 94 and the storage plunger 91 are restored and moved. The negative pressure plunger 94 and the storage plunger 91 can be restored without using an urging force acting from another member such as an urging member. Thus, thrust can be applied to the negative pressure plunger 94 and the storage plunger 91 while simplifying the structure.
As a general urging member, for example, use of a metal spring or the like is conceivable, but by not using this kind of urging member, the trigger type liquid ejector 1 can be formed only of a synthetic resin material. become.

Further, since a plurality of negative pressure cylinders 93 and a plurality of negative pressure plungers 94 are provided, the diameter of each negative pressure cylinder 93 can be reduced while securing the thrust, and the size of the trigger type liquid ejector 1 can be reduced. .
Further, a plurality of negative pressure cylinders 93 are arranged in series in the front-rear direction. Therefore, by reducing the diameter of each of the negative pressure cylinders 93 as described above, it is possible to reduce the projected area of the entire plurality of negative pressure cylinders 93 in the front-rear direction. Thereby, the size of the trigger type liquid ejector 1 can be effectively reduced.

  Further, a plurality of negative pressure cylinders 93 are arranged in series in the front-rear direction with respect to the storage cylinder 90. Therefore, by reducing the diameter of the series cylinder body 98 formed by the storage cylinder 90 and the plurality of negative pressure cylinders 93, the projected area of the series cylinder body 98 in the front-rear direction can be reduced. Thereby, more effective miniaturization of the trigger type liquid ejector 1 can be achieved.

The storage cylinder 90 and the plurality of negative pressure cylinders 93 are coaxially arranged with each other. Therefore, by reducing the diameter of the serial cylinder body 98, the trigger type liquid ejector 1 can be more effectively reduced in size.
Moreover, the maximum outer diameter of the storage cylinder 90 and the maximum outer diameter of each of the plurality of negative pressure cylinders 93 are equal to each other. Therefore, the internal volumes of the storage cylinder 90 and the plurality of negative pressure cylinders 93 can be efficiently secured while reliably reducing the diameter of the serial cylinder body 98.

In addition, when the liquid in the storage cylinder 90 is ejected from the ejection holes 4, the outflow of the liquid from the storage cylinder 90 into the connection cylinder 30 can be regulated by the storage valve 32. Therefore, for example, it is possible to easily increase the pressure of the liquid ejected from the ejection hole 4 through the ejection cylinder 11, and it is possible to eject the liquid in a suitable form.
Further, since the plug 31 is formed integrally with the main cylinder 53, an increase in the number of parts can be suppressed.

Further, since the connecting cylinder 30 and the storage cylinder 90 are arranged in parallel in the vertical direction and have a common partition wall W3, the size of the ejector main body 2 can be reduced.
Further, a recovery passage 117 is provided in the ejector main body 2. Therefore, when the liquid is further introduced into the storage cylinder 90 with the storage plunger 91 sufficiently moved rearward, the liquid can be returned from the recovery passage 117 into the container body A. Thereby, it is possible to suppress the pressure in the storage cylinder 90 from becoming excessively high, and to easily prevent, for example, damage to the storage cylinder 90.

(2nd Embodiment)
Next, a trigger type liquid ejector 200 according to a second embodiment of the present invention will be described with reference to FIGS.
In the second embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof will be omitted. Only different points will be described.

  As shown in FIGS. 6 to 9, in the trigger type liquid ejector 200 according to the present embodiment, the plug member 150 includes the guide cylinder 153 and the regulating lid 154 in addition to the fitting part 151 and the support 152 described above. , A movable cylinder 155, and an operation unit 156.

  As shown in FIG. 7, the guide cylinder 153 is arranged coaxially with the central axis O2. The guide cylinder 153 protrudes rearward from the support 152. The guide cylinder 153 is formed integrally with the support 152. The regulating lid 154 is attached to the rear end of the guide cylinder 153, and closes this rear end. The regulating lid 154 has an elongated hole 157 penetrating the regulating lid 154. In a front view of the regulating lid 154 viewed from the front and rear, the elongated hole 157 is vertically long. The movable cylinder 155 is slidably received in the guide cylinder 153 in the front-rear direction.

  The operation unit 156 includes a main body plate 158, a finger hook 159, and a locking shaft 160. The main body plate 158 is formed in a plate shape with the front and back faces in the left-right direction. The main body plate 158 is inserted into the elongated hole portion 157 so as to be able to move back and forth. The finger hook 159 protrudes rearward from the main body plate 158. The finger hook 159 is formed in an annular shape that opens in the left-right direction. The locking shaft 160 protrudes forward from the main body plate 158. The locking shaft 160 includes a rear butting portion 161 and a front insertion portion 162. The abutting portion 161 abuts on the rear end surface of the movable tubular portion 155 from the rear side. The insertion portion 162 is inserted into the movable cylindrical portion 155 so as to be rotatable around the central axis O2 and to be movable back and forth.

In a state where the abutting portion 161 abuts on the movable tubular portion 155, the insertion portion 162 is movable in the movable tubular portion 155 rearward. Moreover, in this state, a communication gap 165 is provided between the outer peripheral surface of the insertion portion 162 and the inner peripheral surface of the movable cylindrical portion 155 so as to extend longitudinally in the movable cylindrical portion 155 in the front-rear direction.
Locking portions 163 are separately formed on the outer peripheral surface of the insertion portion 162 and the inner peripheral surface of the movable cylindrical portion 155. As shown in FIG. 9, when the insertion portion 162 moves rearward in the movable cylindrical portion 155, the insertion portions 162 and the locking portions 163 of the movable cylindrical portion 155 are locked to each other. At this time, further backward movement of the insertion portion 162 with respect to the movable cylinder portion 155 is restricted, and the insertion portion 162 moves rearward together with the movable cylinder portion 155. Further, the communication gap 165 is closed, and a second sealed space K5 is formed in the guide cylinder 153 in front of the movable cylinder 155.

  The fitting section 151 is provided with a connection path 164 communicating with the communication path 144. The connection path 164 passes through the fitting part 151 in the front-rear direction. The connection path 164 can communicate with the second closed space K5. Further, the connection path 164 can communicate with the first closed space K1 through the communication path 144 and the communication section 146. The communication parts 146 are provided in the same number as the negative pressure cylinders 93 corresponding to the negative pressure cylinders 93. A part of the communication part 146 is formed by the communication opening 145. Another part of the communication portion 146 is provided between the negative pressure plungers 94 adjacent in the front-rear direction or between the negative pressure plunger 94 adjacent to the front-rear direction and the plug member 150. As the other part, for example, a concave groove formed on the inner surface of the second concave portion 142 can be adopted.

  In the plug member 150, the fitting part 151, the support part 152, and the guide cylinder part 153 form an auxiliary cylinder 171. The movable cylinder portion 155 and the operation portion 156 form an operation member 172. The operation member 172 is slidable in the front-rear direction (axial direction) within the auxiliary cylinder 171 and is closely fitted to the auxiliary cylinder 171. The communication passage 144 is provided between the auxiliary cylinder 171 and the operating member 172, between the first closed space K <b> 1, which is a portion of the negative pressure cylinder 93 located on the front side (the other side in the axial direction) of the negative pressure plunger 94. The second closed space K5, which is a portion to be located, communicates with the second closed space K5.

  The pressure receiving area of negative pressure plunger 94 may be set to be larger than the pressure receiving area of operation member 172. Specifically, when the outer surfaces of each of the negative pressure plunger 94 and the operation member 172 are projected onto a projection surface orthogonal to the central axis O2, the negative pressure plunger 94 that appears in an annular shape coaxial with the central axis O2 on the projection surface. The area of the shadow (projected area of the negative pressure plunger 94) is set to be larger than the area of the shadow of the operation member 172 (projected area of the operation member 172) which appears in a circular shape coaxial with the central axis O2 on the projection plane. The pressure receiving area of the negative pressure plunger 94 is the projected area of the negative pressure plunger 94 in the negative pressure cylinder 93. The pressure receiving area of the operation member 172 is the projected area of the operation member 172 in the auxiliary cylinder 171.

(Operation of trigger type liquid ejector)
Next, a case where the trigger type liquid ejector 200 configured as described above is used will be described. In the initial state before the operation, as shown in FIG. 7, the abutting portion 161 abuts against the rear end surface of the movable cylindrical portion 155, and the front end surface of the movable cylindrical portion 155 abuts against the rear end surface of the support portion 152. .
In the trigger type liquid ejector 200, the operation part 156 of the plug member 150 is operated before the operation of the trigger part 51, and the operation member 172 is moved to the rear side with respect to the auxiliary cylinder 171 in advance before the continuous ejection. .

  First, a finger is put on the finger hook 159 to pull the operation unit 156 backward. Then, while the main body plate 158 moves rearward in the elongated hole portion 157, the locking shaft 160 moves rearward in the movable cylindrical portion 155. When the movable cylindrical portion 155 and the locking shaft 160 are locked via the locking portion 163, the movable cylindrical portion 155 slides backward in the guide cylindrical portion 153. At this time, the second closed space K5 is formed and expanded between the movable cylinder 155 and the support 152, and a negative pressure is generated in the second closed space K5. This negative pressure acts on the first closed space K1 (the portion where the first closed space K1 is to be formed) in each negative pressure cylinder 93 through the connection path 164, the communication path 144, and the communication portion 146.

When the operation unit 156 is pulled backward and the entire main body plate 158 moves behind the elongated hole 157, the operation unit 156 is rotated about the central axis O2 by, for example, about 90 degrees. As a result, the main body plate 158 is locked from the rear side to the rear end surface of the regulating lid 154, and the forward movement of the operating portion 156 is regulated.
When the operation unit 156 pulled rearward is moved forward, the operation unit 156 is rotated again so that the direction in which the main body plate 158 extends in the front view coincides with the direction in which the long hole 157 extends. When the operation unit 156 is moved forward in this state, the main body plate 158 is inserted into the elongated hole 157, and the operation unit 156 is moved forward. Then, the butting portion 161 abuts on the movable cylinder 155, and the movable cylinder 155 also moves forward.

  At this time, the communication gap 165 is opened by releasing the locking between the locking portions 163. Then, the second closed space K5 is opened to the outside through the communication gap 165. As a result, for example, even if air is sucked from the first closed space K1 to the second closed space K5 and air is stored in the second closed space K5, the air is transferred to the outside through the communication gap 165. Can be discharged. This makes it possible to reliably generate a negative pressure in the second closed space K5 when the operation unit 156 is towed backward again.

As described above, according to the trigger-type liquid ejector 200 according to the present embodiment, the operation member 172 is moved backward with respect to the storage plunger 91 in advance before the continuous ejection, so that the first sealed space is provided. K1 can be reduced in pressure through the communication passage 144. Thus, when the negative pressure plunger 94 moves rearward, the first closed space K1 can be reliably brought into the negative pressure state.
Therefore, in the process of continuously injecting the liquid after storing the liquid in the storage cylinder 90, it is possible to suppress a decrease in the thrust applied to the storage plunger 91 from the beginning to the end. Therefore, it is possible to stabilize the ejection state of the liquid and to improve the liquid shortage.

  Note that the technical scope of the present invention is not limited to the above embodiment, and various changes can be made without departing from the spirit of the present invention.

The plurality of negative pressure cylinders 93 need not be arranged in series in the front-rear direction with respect to the storage cylinder 90. For example, a plurality of negative pressure cylinders 93 may be arranged so as to be shifted in the vertical direction with respect to the storage cylinder 90, and may be arranged in parallel with the storage cylinder 90 in the vertical direction.
The plurality of negative pressure cylinders 93 do not have to be arranged in series in the front-rear direction. For example, the plurality of negative pressure cylinders 93 may be arranged so as to be shifted from each other in the vertical direction, and the plurality of negative pressure cylinders 93 may be arranged in parallel in the vertical direction.

  The recovery passage 117 may not be provided. The connection cylinder part 30 and the storage cylinder 90 do not need to include the common partition wall W3. The vertical supply cylinder portion 10 and the storage cylinder 90 do not need to include the common partition wall W4.

  In the above embodiment, the storage plunger 91 moves rearward with the supply of the liquid into the storage cylinder 90, but the present invention is not limited to this. For example, it is also possible to adopt a configuration in which the storage plunger 91 moves forward with the supply of the liquid into the storage cylinder 90. Furthermore, a configuration is adopted in which the central axis O2 of the storage cylinder 90 extends in a direction different from the front-rear direction, and the storage plunger 91 moves in an axial direction along the central axis O2 (a direction different from the front-rear direction). You can also.

  In the above-described embodiment, the trigger portion 51 is swingable rearward. However, a configuration in which the trigger portion 51 moves rearward can be appropriately adopted. For example, the trigger portion 51 may be slidable rearward.

  In addition, it is possible to appropriately replace the components in the above-described embodiment with well-known components without departing from the spirit of the present invention, and the above-described modifications may be appropriately combined.

1, 200 trigger type liquid ejector 2 ejector main body 3 nozzle member 4 ejection hole 10 vertical supply cylinder 11 ejection cylinder 50 trigger mechanism 51 trigger unit 90 storage cylinder 91 storage plunger 93 negative pressure cylinder 94 negative pressure plunger A container body A1 mouth

Claims (5)

An ejector body attached to a container body containing a liquid,
A nozzle member arranged on the front side of the ejector main body and having an ejection hole for ejecting liquid toward the front,
The ejector body,
A vertical supply cylinder extending vertically and sucking up the liquid in the container body;
An injection tube portion disposed in front of the vertical supply tube portion and having an inner side communicating with the inside of the vertical supply tube portion,
A trigger portion disposed in front of the vertical supply cylinder portion so as to be movable rearward in a forward biased state, and by moving the trigger portion rearward, liquid is transferred from the inside of the vertical supply cylinder portion to the inside of the injection cylinder portion. And a trigger mechanism for flowing through the ejection hole side through, a trigger type liquid ejector,
By the backward movement of the trigger portion, a storage cylinder in which the liquid that has passed through the inside of the vertical supply cylinder portion is supplied,
A storage plunger that is disposed in the storage cylinder so as to be movable in an axial direction along the central axis thereof and moves toward one side in the axial direction with the supply of the liquid into the storage cylinder,
A plurality of negative pressure plungers coupled to the storage plunger and associated with the axial movement of the storage plunger;
A plurality of negative pressure cylinders extending along the axial direction and having the other end opening in the axial direction closed, and the plurality of negative pressure plungers housed therein so as to be individually movable toward one side in the axial direction. And a trigger type liquid ejector characterized by comprising:   2. The trigger type liquid ejector according to claim 1, wherein the plurality of negative pressure cylinders are arranged in series in the axial direction.   The trigger type liquid ejector according to claim 2, wherein the plurality of negative pressure cylinders are arranged in series in the axial direction with respect to the storage cylinder.   The trigger type liquid ejector according to claim 3, wherein the storage cylinder and the plurality of negative pressure cylinders are arranged coaxially with each other.   The trigger type liquid ejector according to claim 4, wherein a maximum outer diameter of the storage cylinder and a maximum outer diameter of each of the plurality of negative pressure cylinders are equal to each other.

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