JP5984188B2 - Trigger type liquid ejector - Google Patents

Description

  The present invention relates to a trigger type liquid ejector.

  A trigger type liquid ejector that sucks liquid from a container body by operating a trigger and discharges the liquid from a nozzle is known (Patent Document 1). This liquid ejector has an injection cylinder part provided with a nozzle on the tip side from the upper front surface of the vertical main cylinder part communicating with the container body, and the cylinder cylinder part from the vertical main cylinder part front surface below the injection cylinder part. Each is connected to the vertical main cylinder part and protrudes forward, and the latter half part of the plunger is fitted into this cylinder cylinder part, and the trigger that hangs down from the front side of the injection cylinder part is linked to the front half part of the plunger. ing.

Japanese Patent No. 3789904

  The trigger type liquid ejector of Patent Document 1 is configured such that liquid is discharged only when the trigger is pulled. However, for example, when spraying a liquid over a large area, it is necessary to repeat the trigger many times, which is troublesome.

A first object of the present invention is to provide a trigger type liquid ejector that can continuously inject liquid not only when a trigger is pulled but also after that.
The second object of the present invention is to propose a trigger type liquid ejector having a lock mechanism for selectively stopping the function of the continuous injection.

The first means has a vertical main cylinder portion 12 whose upper end is closed so as to communicate with the container body 100, and the injection cylinder portion 20 from the upper front surface of the vertical main cylinder portion 12 and below the injection cylinder portion 20. A main body 4 in which the cylinder tube portion 22 is communicated with the inside of the vertical main tube portion 12 from the front surface of the vertical main tube portion,
A nozzle 54 attached to the front end of the injection cylinder portion 20;
A main plunger 58 that is engaged by urging the latter half part forward in the cylinder tube part 22;
A trigger 62 that is swingably suspended from the front side of the injection cylinder 20 and linked to the front half of the main plunger 58;
The vertical passage second check valve 40 to the vicinity of the rear end portion of the injection tube portion 20 of the P _V defining with the longitudinal main cylindrical portion 12, also the first inverse to the channel portion of the second check valve downwardly Each of the stop valves 36 is formed, and the operation of the trigger 62 causes the liquid in the container body 100 to be sucked into the cylinder tube portion 22 through the first check valve 36 and further from the cylinder tube portion 22 to the second reverse. A trigger-type ejector configured to be ejected from a nozzle 54 through a stop valve 40;
The body 4 includes a tank cylinder wall S ₁ which communicates with a vertical passage while rearward projection from the upper rear surface of the vertical main cylinder part 12, fitted in a liquid-tight by the forward biased the tank cylinder wall S ₁ A sub-tank S having a combined auxiliary plunger S ₂ ,
When the trigger 62 is pulled, a part of the liquid in the cylinder cylinder part 22 enters the sub tank S and the rest is ejected from the nozzle 54 via the injection cylinder part 20, and when the trigger 62 is released, the liquid in the sub tank S is ejected. It was configured to be ejected from the nozzle 54 through the tube portion 20.

In this means, as shown in FIG. 1, it is proposed to provide a sub tank S on the upper rear surface of the vertical main cylinder portion 12 of the main body 4 of the trigger type liquid ejector. Sub tank S from upper rear surface of the vertical main cylindrical portion 12 and the tank cylinder wall S ₁ to rearward projection, and a auxiliary plunger S ₂ fitted to the tank cylinder wall S _1. The subtank S allows the liquid in the subtank S to protrude from the nozzle (see FIGS. 3 and 5) during the stage where the trigger returns to the front and also after the trigger returns to the front, allowing continuous liquid injection.

The second means includes a first means, and to the tank cylinder wall S _1, as well as opening the pressure release hole 16 for defining a limit position after the auxiliary plunger S _2, the longitudinal main cylindrical portion 12 the outward to form a liquid return passage P _R leading to the lower end of the vertical main cylinder part 12 from the pressure release hole 16.

In this means, as shown in FIG. 1, it proposes to form a liquid return passage P _R leading from the pressure release hole 16 opened to the tank cylinder wall S ₁ to the lower end of the longitudinal main cylindrical portion 12. This configuration can be returned to the liquid in the sub tank S when the auxiliary plunger S ₂ is retracted to a rear limit position via the liquid return flow path P _R to the container body 100 (see FIG. 4).

  The third means includes the first means or the second means, and the pressure accumulation valve A is provided in the nozzle 54.

  In this means, it is proposed to provide an accumulator valve A in the nozzle 54 as shown in FIG. In the present invention, it is characterized in that the liquid can be continuously ejected even when the operation of the trigger is stopped as shown in FIG. 5, but when the ejection pressure is weakened so as not to reach the ejection target, the ejected liquid is wasted, There is also a risk of dripping from the tip of the nozzle. By providing the pressure accumulating valve A described above, these disadvantages can be avoided.

Fourth means from the first means includes one of the third means and having a lock mechanism 84 for limiting the retraction of the auxiliary plunger S _2,
The locking mechanism 84 is rotated, which is connected to the rotary member 84a of the inserted rotatably and rearwardly withdrawn so as not to around the front and rear direction of the rotary shaft, and the rotary member 84a in the second half portion of the tank cylinder wall S ₁ consists of a knob portion 84b, the spacer 84c which is interposed between the front surface of the rotating body 84a and the auxiliary plunger _{S 2,}
When one of the rotary body 84a and the spacer 84c has a slit 90 in the front-rear direction, and the rotary knob 84b is turned to the unlocked position, the other of the rotary body 84a and the spacer 84c enters the slit 90. is inserted, the auxiliary retraction of the plunger S ₂ becomes possible, as opposed surface of the rotating body 84a and the spacer 84c is when turning the rotary knob 84b to the locked position to restrict contact with retraction of the auxiliary plunger S ₂ Configured.

In this section, we propose providing a locking mechanism 84 which may be as shown in FIG. 5, to restrict the retraction of the auxiliary plunger S ₂ as appropriate. The lock mechanism 84 includes a rotating body 84a fixed at a fixed position in the front-rear direction, a rotary knob 84b connected to the rotating body 84a, and a spacer 84c interposed between the rotating body 84a and the auxiliary plunger S2. The auxiliary plunger S2 cannot be retracted by the spacer 84c. However, one of the rotating body 84a and the spacer 84c (the former in the illustrated example) is provided with a slit 90 that allows the other to be inserted, and when the rotary knob 84b is turned to the unlocked position (see FIG. 8). and the other member becomes insertable into cut-split 90, it is possible to retreat as the auxiliary plunger S ₂ in FIG. 10.

The fifth means includes any one of the fourth means, and the rotating body 84a is formed as a cylindrical wall with an open front, and the cylinder is formed by slitting a part of the cylindrical wall in the circumferential direction. The cut 90 is formed by the cylindrical hole 90a and the slit 90b on the wall,
The spacer 84c includes a rod body 98 that can be fitted into the cylindrical hole 90a, and a baffle plate 99 that is attached to the side surface of the rod body 98 and can be fitted into the slit 90b.

  This means proposes a preferred form of the rotating body 84a and the spacer 84c. That is, since the rotating body 84a has a shape in which a slit is formed in the cylindrical wall, it can have a simple structure.

The sixth means has the fifth means, and when the pressing protrusion 92 is provided in front of the rotating body 84a so as to be positioned in the vicinity of the slit 90b and the rotating body 84a is rotated. The pressing protrusion 92 is formed so as to be able to contact the baffle plate 99. In this contact state, the baffle plate 99 can be inserted into the slit 90b.

  In this means, the baffle plate 99 can be inserted into the slit 90b when the pressing protrusion 92 projecting forward from the rotating body 84a contacts the baffle plate 99. Therefore, it can be recognized that the user is in an unlocked state due to the touch at the time of contact.

According to the invention relating to the first means, since the sub tank S is formed on the upper rear side of the vertical main cylindrical portion 12 of the main body 4 of the trigger type liquid ejector 1, it is possible to continuously eject liquid.
According to the invention according to the second means, since the formation of the liquid return flow path P _R leading from the pressure release hole 16 opened to the tank cylinder wall S ₁ to the lower end of the longitudinal main cylindrical portion 12, the pressure in the sub tank S Can be adjusted.
According to the third aspect of the invention, since the pressure accumulation valve A is provided in the nozzle 54, the liquid ejection pressure is stabilized.
According to the invention of the fourth means, because provided a lock mechanism 84 for restricting the retraction of the auxiliary plunger S _2, can be selectively used and otherwise in the case of using the sub-tank.
According to the fifth aspect of the invention, since the rotating body 84a has a shape in which a slit is formed in the cylindrical wall, it can have a simple structure.
According to the invention relating to the sixth means, the user can easily recognize that the unlocking state has been achieved by the touch when the pressing protrusion 92 contacts the baffle plate 99.

It is a longitudinal cross-sectional view of the trigger type liquid ejector which concerns on 1st Embodiment of this invention. It is explanatory drawing which shows the state which pulled the trigger of the trigger type liquid ejector of FIG. It is explanatory drawing which shows the state which the trigger of the trigger type liquid ejector of FIG. 1 returned. It is explanatory drawing of the state which the auxiliary plunger of the trigger type liquid ejector of FIG. 1 retracted to the opening position of the pressure release hole. It is explanatory drawing of the state in the middle of the auxiliary plunger returning forward after stop of trigger operation. It is the longitudinal cross-sectional view which looked at the trigger type liquid ejector which concerns on 2nd Embodiment of this invention from the side. It is a longitudinal cross-sectional view of the principal part of the trigger type liquid ejector of FIG. It is the longitudinal cross-sectional view which is the longitudinal cross-sectional view which looked at the principal part of the trigger type liquid ejector of FIG. 6 from the VIII-VIII direction. It is a figure when a stopper is abbreviate | omitted from the structure of FIG. It is action explanatory drawing when rotating the rotary knob of the trigger type liquid ejector of FIG. It is sectional drawing of XI-XI of FIG. It is explanatory drawing which shows a mode that an auxiliary plunger reverse | retreats from the state of FIG. It is explanatory drawing in the middle from the state of FIG. 8 to the state of FIG. It is a figure which shows the modification of the trigger type liquid ejector of FIG.

  1 to 5 show a first embodiment of a trigger type liquid ejector according to the present invention. In the figure, 1 denotes a trigger type liquid ejector. For convenience of explanation, the basic structure of the trigger type liquid ejector will be described first, and the characteristic part will be described later. Further, the left side of FIG. 1 will be described as the front part, the right side as the rear part, the near side as the right part, and the opposite side as the left part.

  The trigger type liquid ejector 1 includes a mounting cap 2, a main body 4, a connecting member 50, a nozzle 54, a main plunger 58, a trigger 62, and a main body cover 64. Each of these members can be formed of a synthetic resin material unless otherwise specified.

  The mounting cap 2 is screwed to the outer periphery of the mouth and neck portion 102 of the container body 100 to mount and fix the trigger type liquid ejector 1 to the container body 100, and is continuously connected to the lower portion of the main body 4. . In the illustrated example, the upper end portion of the mounting cap 2 is a small inner diameter portion, and a downward engaging step portion 2a is formed inside the small inner diameter portion. The engagement step portion 2a and the mouth and neck portion 102 of the container body 100 A flange 32a and a packing 41 of the main body 4, which will be described later, are provided therebetween.

  The main body 4 is configured by assembling the main body portion 6 and the intake 30.

The main body portion 6 includes a connecting cylinder portion 8 having a lower end opening whose upper end is closed, and a vertical main cylinder portion 12 having a base end opened upward at a rear eccentric position of the top plate 10 of the connecting cylinder portion 8. Moreover, the injection cylinder part 20 which opened the base end to the upper end part of the vertical main cylinder part 12 is extended ahead. Further, a cylinder tube portion 22 having an open front surface projects forward from the front surface of the vertical main tube portion below the injection tube portion 20. The lower portion of the rear wall of the cylinder tube portion 22 is continuous with the top plate 10, and a first vent hole 24 is opened in the continuous portion. From the central portion of the cylindrical wall portion of the vertical main cylindrical portion 12 surrounded by the rear end portion of the cylinder cylindrical portion 22, a cylindrical protruding portion 26 at the front end is protruded forward, and one of the outer peripheral portions of the cylindrical wall portion is projected. The first orifice O ₁ is opened in the part.

  The intake 30 includes a large-diameter cylindrical portion 32 having a gap with the top plate 10 of the coupling cylindrical portion 8 and a rear eccentricity of the top wall 33 of the large-diameter cylindrical portion 32 in the coupling cylindrical portion 8. A small-diameter cylindrical portion 34 that passes through the position and rises upward and is fitted into the vertical main cylindrical portion 12 is provided. In the illustrated example, the top wall portion around the small diameter cylindrical portion 34 is recessed to form an annular recessed portion R, and the lower end portion of the vertical main tubular portion 12 is inserted into the annular recessed portion R.

  In the illustrated example, a first check valve 36 is provided in the upper end portion of the small diameter cylindrical portion 34, and an auxiliary valve having a second check valve 40 built in the vertical main cylinder portion above the small diameter cylindrical portion 34. The cylindrical portion 38 is fitted. The upper end portion of the auxiliary cylinder portion 38 abuts against the lower surface of the engagement convex portion 13 provided on the upper end portion of the vertical main cylinder portion 12. In the present embodiment, the small diameter cylinder portion 34 and the auxiliary cylinder portion 38 define a longitudinal flow path Pv. However, this structure can be changed as appropriate. For example, the small-diameter cylindrical portion 34 and the auxiliary cylindrical portion 38 may be continuous. The upper end of the suction pipe 42 is fitted into the lower part of the small diameter cylindrical part 34 and the lower end is suspended in the container body 100.

  Further, a second vent hole 44 is formed in the top wall 33 of the large diameter cylindrical portion 32, and when the main plunger 58 is pushed in, the outside and the inside of the container body 100 are connected to the first vent hole 24 and the second vent hole. It communicates via 44 (see FIG. 2) and is configured such that outside air is introduced into the container body 100 which has been made negative pressure.

  Further, a flange-like top wall at the upper end of the mounting cap 2 is brought into contact with the upper surface of the flange 32 a protruding from the outer periphery of the large-diameter cylindrical portion 32, and the mounting cap is rotatably mounted on the main body portion 6. A packing 41 is provided below the flange 32a.

The body portion 6 is provided with a first check valve 36 above the vertical passage P _V, a second orifice O ₂ that communicates the injection passage P _J which is defined by the injection tube portion 20 .

The connecting member 50 is attached to the tip of the injection cylinder part 20 by fitting a mounting cylinder part 50 a around the outer periphery of the tip of the injection cylinder part 20, and the nozzle 54 is attached to the tip of the injection cylinder part 20 via the connection member 50. Are connected. A substrate 50b that covers the tip end surface of the injection cylinder portion 20 is provided at the tip of the mounting cylinder portion 50a. Further, from the front surface of the substrate 50b, a small-diameter cylinder peripheral wall 50c and a support cylinder portion 50d surrounding the small-diameter cylinder peripheral wall 50c are projected forward in an inner and outer double cylinder shape. The through hole 52 provided in the small diameter cylinder peripheral wall 50c inwardly of the substrate 50b portion communicates the injection passage P _J in the nozzle 54 distal end of the spout through the hole 52.

  The nozzle 54 has a substantially hexagonal shape when viewed from the front as shown in FIG. 1 and is connected to the connecting member 50 so as to be rotatable. In the fitting recess D formed at the center of the back surface of the nozzle 54, the nozzle 54 is connected to the support cylinder 50d. It is mated. Further, a lid plate fitting recess 54 a is formed in the center of the front surface of the nozzle 54. The lid plate 56 is fitted in the lid plate fitting recess 54a so as to be openable and closable. The upper end portion of the lid plate 56 is pivotally attached to a shaft portion 54b protruding from the side surface of the lid plate fitting recess 54a.

  A pressure accumulating valve A is formed inside the nozzle 54. That is, the nozzle 54 protrudes backward from the outer peripheral portion of the front surface of the fitting recess D through the valve cylinder portion 54c and the large-diameter cylinder peripheral wall 54d surrounding the valve cylinder portion 54c. The large-diameter cylinder peripheral wall 54d has a larger diameter than the small-diameter cylinder peripheral wall 50c. Further, the nozzle 54 incorporates a pressure accumulating valve body 57 for forming the pressure accumulating valve A. The pressure accumulating valve body 57 protrudes from the outer peripheral portion of the vertical plate-shaped plug portion 57a to a peripheral wall having a through hole in the front half portion, and is a small-diameter piston portion 57b formed in the latter half portion of the peripheral wall. A large-diameter piston portion 57c having a tapered shape protrudes in the direction. The plug part 57a is inserted into the valve cylinder part 54c so as to be detachable backward. The small-diameter piston portion 57b is liquid-tightly fitted in the small-diameter cylinder peripheral wall 50c, and the large-diameter piston portion 57c is liquid-tightly fitted in the large-diameter cylinder peripheral wall 54d. A third spring 55 is interposed between the rear surface of the plug portion 57a and the front surface corresponding portion of the substrate 50b (in the illustrated example, the third spring 55 is disposed on the outer periphery of the projecting member projecting forward from the substrate 50b. The pressure accumulating valve body 57 is urged forward. The pressure accumulating valve body 57 is configured such that when the liquid ejection pressure from the injection cylinder portion 20 exceeds a certain level, the pressure accumulating valve body 57 moves backward due to the difference in diameter between the large diameter cylinder peripheral wall 54d and the small diameter cylinder peripheral wall 50c and the pressure accumulation valve A opens. ing.

  The main plunger 58 has a cylindrical shape with the front end closed, and the latter half has a larger diameter than the front half, and the sliding portion 58a formed in the latter half is connected to the inner peripheral surface of the cylinder cylinder 22 and the cylindrical protrusion. The outer peripheral surface of the portion 26 is liquid-tightly fitted. A first spring 60 is interposed between the front half portion of the main plunger 58 and the rear portion of the cylindrical protrusion 26. The main plunger 58 is mounted so that the sliding portion 58a can be pushed backward from the state where the first vent hole 24 is closed.

  The trigger 62 has a pair of side plates 62b extending from both sides of the front plate 62a, a bottom plate 62c extending from the lower ends of the front plate 62a and the side plate 62b, and on both sides of the connecting member 50 above the front plate 62a. The upper end portions of both side plates 62b projecting from each other are pivotally attached to each other so as to be swingable back and forth. Further, the tip of the main plunger 58 is linked to the upper portion of the trigger 62 so that the main plunger 58 can be pushed in by pulling in the trigger 62, and the original state is restored from the pushed state by the elastic restoring force of the first spring 60. The main plunger 58 is pulled back to the original state by the trigger to be performed.

  The main body cover 64 covers and fixes the upper surface, both side surfaces, and the rear surface of the main body 4 to the main body 4.

In the present invention, a sub tank S is provided on the upper rear side of the vertical main cylinder portion 12. The sub-tank S includes a tank cylinder wall _{S 1,} the auxiliary plunger _{S 2,} a spring retainer _{S 3,} the second spring _{S 4,} is composed of a fitting cylindrical portion _{S 5.}

The tank cylinder wall S ₁ protrudes rearward from the upper rear surface side of the vertical main cylinder part 12. The cylindrical wall portion of the longitudinal main cylindrical portion surrounded by the tank cylinder wall S _1, and opens the third orifice O ₃ for communicating the tank cylinder wall S ₁ and vertical flow pass P _V. Further, in the illustrated example, an annular convex portion 14 for contacting the plunger is formed on the center side of the cylindrical wall portion. The front half of the tank cylinder wall S ₁ is open the pressure release hole 16. This will be described later.

The auxiliary plunger S ₂ is fitted in a liquid tight manner to the tank cylinder wall S _1. Auxiliary plunger S ₂ shown, both end portions in the front end portion of the sliding tube portion 70 which is a large outer diameter, made by connecting the outer peripheral portion of the front wall 72 which partitions the inner tank cylinder wall, a front surface of the front wall 72 An annular groove 74 is formed on the outer periphery. However, this structure can be changed as appropriate.

The spring holder S ₃ is formed by closing the rear end surface of the holding cylinder portion 76 fitted to the outer surface of the tank cylinder wall S ₁ with a spring receiving plate 78. An air escape hole 80 is opened at an appropriate position (in the illustrated example, in the center) of the spring receiving plate 78.

The fitting tube S ₅ is backward from the longitudinal main barrel portion of the outside of the tank cylinder wall S _1, is projecting from the tank tube walls S ₁ and concentrically. Engaging means C ₁ , C ₂ for retaining the spring holder S ₃ which are engaged with each other are provided at corresponding portions of the fitting cylinder part S ₅ and the holding cylinder part 76. However, these structures can be changed as appropriate.

The second spring S ₄ is interposed between the front wall 72 of the auxiliary plunger S ₂ and the spring receiving plate 78. Elastic force of the second spring S ₄ is the pressure rise in the second check valve 40 in the vertical passage P _V portion of the upper case minus the trigger 62 backward auxiliary plunger S ₂ set to retract . Thereby, a part of the liquid supplied from the cylinder cylindrical portion 22 to the upper side of the second check valve 40 can be stored in the sub tank S.

  As a preferred embodiment, about 50% of the liquid supplied above the second check valve 40 can be directly jetted, and the remaining 50% can be designed to enter the sub tank S. A large amount of liquid can be stored in the sub tank S by operating the trigger several times as will be described later.

Also the body 4 is provided with a liquid returning flow path P _R extending from the pressure release hole 16 to the inside of the mounting cap 2. Liquid return flow path _{P R} shown, a first gap portion _{g 1,} the second gap portion _{g 2,} is constituted by a third gap _{g 3.}

The first gap portion g ₁ has a front inner portion of the holding cylinder portion 76 as a large inner diameter, and the inner diameter portion and the inner surface of the fitting cylinder portion in front of the holding cylinder portion 76 and the outer surface of the tank cylinder wall portion. Formed in between.

The wall portion 8a after connection tubular part 8 in the illustrated example, and extends upward of the top plate 10, and ligated to the front lower side of the fitting cylinder S _5.

The second gap portion g ₂ is formed as a space between the rear wall portion 8 a of the connecting tube portion 8 and the rear wall portion of the vertical main tube portion 12. This space is closed on both sides in the circumferential direction of the extended portion of the rear wall portion 8a and is blocked from the outside.

  In the illustrated example, the rear wall portion of the annular depression R is a continuous wall portion that is common with the rear wall portion of the large-diameter cylindrical portion 32, and this continuous wall portion is separated from the rear wall portion of the longitudinal main cylindrical portion 12. Yes.

The third gap portion g ₃ is formed between the rear wall portion of the annular depression R and the rear wall portion of the vertical main cylinder portion 12.

According to the above configuration, as shown in FIG. 2, when the trigger type liquid ejector is attached to the mouth and neck portion 102 of the container body 100 and the lid plate 56 is opened and the trigger 62 is pulled backward, the main plunger 58 is moved to the first position. It enters the first liquid in the cylinder tube portion 22 retracts against the elastic force of the spring 60 is a vertical passage P _V from the first orifice O _1, pushes up the second check valve 40. Part of the liquid that has passed through the second check valve 40 passes through the injection cylinder portion 20, opens the pressure accumulation valve A, passes through this pressure accumulation valve A, and is ejected forward from the nozzle 54. The remaining liquid passes through the third orifice O ₃ and enters the sub tank S. In this case the auxiliary plunger S ₂ is retracted against the elastic force of the second spring S _4.

Next, when the trigger 62 is released, as shown in FIG. 3, the main plunger 58 advances by the elastic restoring force of the first spring 60, the first check valve 36 is opened, and the second check valve 40 is closed. As a result, the liquid in the container body 100 enters the cylinder tube portion 22 through the first check valve 36 and the first orifice O ₁ .

On the other hand, in the sub tank S, the auxiliary plunger S ₂ moves forward by the elastic restoring force of the second spring S ₄ , and the liquid in the sub tank S becomes the third orifice O ₃ , the second orifice O ₂ , the injection cylinder portion 20, and the pressure accumulating valve A. And is ejected from the nozzle 54.

  That is, in the configuration of the present invention, liquid is ejected not only when the trigger 62 is pulled backward but also when the trigger 62 returns to the front, and continuous ejection is possible.

Although advanced to the need to operate the trigger 62 again the auxiliary plunger S ₂ before limit position (position shown in FIG. 1), in this description, the operation of pulling the trigger before the auxiliary plunger S ₂ reaches the front limit position Shall be repeated. Then, the auxiliary plunger S ₂ while repeating the forward and backward with a certain width, it moves backward as a whole. Auxiliary plunger S ₂ is retracted, too increased pressure, there is a risk that sub-tank S is damaged.

In this invention, (in the illustrated example the first half of the tank cylinder wall) position of the tank cylinder wall S ₁ is provided with a pressure release hole 16 in. When the front wall 72 of the auxiliary plunger S ₂ is retracted from the pressure release hole 16, the liquid in the sub tank S is returned through the liquid return flow path P _R from the pressure release hole 16 to the container body 100 side (see FIG. 4) . Thus the auxiliary plunger S ₂ will not be retracted from the position (rear limit position) shown in FIG.

If you stop the operation of the trigger from the state of FIG. 4, as shown in FIG. 5, the auxiliary plunger S ₂ moves forward. Since the auxiliary plunger S ₂ gushes of liquid from the nozzle 54 to be moved from the rear limit position to the front limit position continues, it is possible to jet the long liquid. Auxiliary plunger S ₂ approaches the front limit position, the accumulator valve A closes the ejection pressure of the liquid is below a certain value.

  Other embodiments of the present invention will be described below. In this description, the description of the same configuration as that of the first embodiment is omitted.

In the present embodiment, there is provided a lock mechanism 84 for restricting the retraction of the auxiliary plunger S _2.

  As shown in FIG. 6, the lock mechanism 84 includes a rotating body 84a, a rotary knob 84b, and a spacer 84c.

FIG. 7 shows the lock mechanism 84 in an enlarged manner.
As shown in FIG. 7, the rotating body 84a is formed of a rotating cylinder part 86 and a contact wall part 88 that closes the rear surface of the rotating cylinder part at the front opening. A connecting rod 94 protrudes from the center of the abutting wall, and this connecting rod protrudes rearward through an air escape hole 80. In this way, the contact wall 88 can be locked to the spring receiving plate 78. A clearance is secured between the air escape hole 80 and the connecting rod 94. The connecting rod 94 in the illustrated example penetrates the main body cover 64. In the drawing, 64a is a through hole.

8 shows the shape of the rotating body 84a and the spacer 84c as viewed in the direction of VIII-VIII in FIG. 7, and FIG. 9 shows the front shape of only the rotating body 84a by omitting the spacer 84c from the structure shown in FIG. I'm drawing each one.
As shown in FIG. 6, a slit 90 b in the front-rear direction is formed in the cylindrical wall of the rotating cylinder portion 86. As shown in FIG. 9, the slit 90 b and the cylinder hole 90 a of the rotating cylinder portion 86 cut the slit. 90 is formed.

  Further, as shown in FIG. 9, a pressing protrusion 92 protrudes forward from the front surface of the rotating cylinder portion 86 adjacent to the slit 90b.

  The rotary knob 84b has a fitting hole 95 for fitting the connecting rod 94 therein. The illustrated rotary knob 84b projects the inner peripheral wall portion 96A and the outer peripheral wall portion 96B forward from the inner peripheral portion and the outer peripheral portion of the ring-shaped plate portion 96C, and forms the fitting hole 95 on the inner surface of the inner peripheral wall portion. ing. However, the structure can be changed as appropriate.

The spacer 84 c includes a rod body 98 in the front-rear direction and a baffle plate 99 that protrudes outward from the outer surface of the rod body 98. The rod body 98 can be fitted into the cylindrical hole 90a, and the baffle plate 99 can be fitted into the slit 90b. In the preferred illustrated embodiment, the spacer 84c protrudes to integrally rearwardly from the front wall 72 of the auxiliary plunger as part of the auxiliary plunger S _2.

  In the illustrated example, a pair of slits 90b and baffle plates 99 are provided, but the structure can be changed as appropriate.

In the above configuration, in the state of FIG. 6, the cut 90 of the rotating body 84a and the spacer 84c have different directions (see FIG. 8). Therefore never spacer 84c is inserted into cut-split 90, the auxiliary plunger S ₂ is not retracted.

Then when the rotary knob 84b as shown in FIG. 10, cut-split 90 and the spacer 84c and faces the same next to the rotating body 84a (see FIG. 11), can be retracted auxiliary plunger _{S 2} as shown in FIG. 12 It becomes.

FIG. 13 is an intermediate view of the process of rotating the rotary knob 84b, and the pressing protrusion 92 rotates in the direction of the arrow together with the rotating body 84a. The pressing protrusion 92 hits the baffle plate 99 and further rotates together with the spacer 84c to reach the state shown in FIG. The user can recognize that the lock is released by the touch at the end. Incidentally, when forming the spacer 84c integrally with the auxiliary plunger _{S 2} is rotated together with the spacer 84c with the aid plunger _{S 2} also tanks tubular wall _S within _1.

FIG. 14 shows a modification of the spacer 84c. In this example, the spacer 84c and the auxiliary plunger S ₂ is molded separately, and then inserted between the auxiliary plunger S ₂ and the rotary body 84a. In the preferred illustrated embodiment, to form a flange portion 98b on the front end portion of the rod 98 of the spacer 84c, fitted with the flange portion 98b in the auxiliary plunger S _2, the rear surface of the flange portion 98b of the second spring S ₄ The front end is in contact.

DESCRIPTION OF SYMBOLS 1 ... Trigger type liquid ejector 2 ... Mounting cap 2a ... Engagement step part 4 ... Main body 6 ... Main body part 8 ... Connection cylinder part 8a ... Rear wall part 10 ... Top plate 12 ... Vertical main cylinder part 13 ... Engagement convex part 14 ... annular projection 16 ... pressure release hole
DESCRIPTION OF SYMBOLS 20 ... Injection | emission cylinder part 22 ... Cylinder cylinder part 24 ... 1st ventilation hole 26 ... Cylindrical protrusion
30 ... Intake 32 ... Large diameter cylinder part 32a ... Flange 33 ... Top wall 34 ... Small diameter cylinder part 36 ... First check valve 38 ... Auxiliary cylinder part 40 ... Second check valve 41 ... Packing 42 ... Pipe 44 ... Second Ventilation hole 50 ... Connecting member 50a ... Mounting cylinder part 50b ... Substrate 50c ... Small diameter cylinder peripheral wall 50d ... Support cylinder part 52 ... Through hole 54 ... Nozzle 54a ... Cover plate fitting recess 54b ... Shaft part 54c ... Valve cylinder part 54d ... Large Diameter cylinder peripheral wall 55 ... Third spring 56 ... Cover plate
57 ... Accumulation valve body 57a ... Plug part 57b ... Small diameter piston part 57c ... Large diameter piston part 58 ... Main plunger 58a ... Sliding part 60 ... First spring 62 ... Trigger 62a ... Front plate 62b ... Side plate 62c ... Bottom plate 64 ... Main body Cover 64a ... Through hole 70 ... Sliding cylinder part 72 ... Front wall 74 ... Ring groove 76 ... Holding cylinder part 78 ... Spring receiving plate 80 ... Air escape hole
84 ... Locking mechanism 84a ... Rotating body 84b ... Rotary knob 84c ... Spacer 86 ... Rotating cylinder 88 ... Abutting wall 90 ... Cutting 90a ... Cylinder hole 90b ... Slit 92 ... Pressing protrusion 94 ... Connecting rod 95 ... Fitting Goana 96A ... inner circumferential wall 96B ... outer circumferential wall 96C ... ring Joban portion 98 ... rod 98a ... rear end 98b ... flange portion 99 ... baffle 100 ... container body 102 ... neck A ... accumulator valve C ₁ , C ₂ ... engaging means D ... fitting recess g ₁ ... first gap part g ₂ ... second gap part g ₃ ... third gap part O ₁ ... first orifice O ₂ ... second orifice O ₃ ... third orifice P V _... vertical flow pass P J _... injection passage P R _... liquid return channel R ... annular recess S ... sub tank S 1 _... tank cylinder wall S 2 _... auxiliary plungers S 3 _... spring holder S 4 _... second spring S 5 _... fitting tube

Claims (6)

It has a vertical main cylinder part (12) whose upper end is closed for communicating with the container body (100). A main body (4) in which the cylinder cylinder portion (22) is communicated with the vertical main cylinder portion (12) from the front surface of the vertical main cylinder portion below
A nozzle (54) attached to the front end of the injection cylinder (20);
A main plunger (58) fitted in the cylinder cylinder portion (22) by urging the latter half portion forward;
A trigger (62) suspended from the front side of the injection cylinder (20) so as to be swingable and linked to the front half of the main plunger (58),
A second check valve (40) is provided in the vicinity of the rear end portion of the injection cylinder portion (20) in the vertical flow path (P _V ) defined by the vertical main cylinder portion (12), and the second check valve is located below the second check valve. The first check valve (36) is respectively formed in the flow path portion of the cylinder, and the operation of the trigger (62) causes the liquid in the container body (100) to pass through the first check valve (36) and to form the cylinder tube portion. (22) A trigger type ejector configured to be sucked up into the cylinder tube portion (22), and then ejected from the nozzle (54) through the second check valve (40). ,
It said body (4) includes a longitudinal flow passage and communicated thereby tank tubular wall (S ₁₎ as well as rearward projection from the upper rear surface of the vertical main cylindrical portion (12), forward to the tank cylinder wall (S ₁₎ in A sub-tank (S) having an auxiliary plunger (S ₂ ) that is energized and fluid-tightly fitted;
When the trigger (62) is pulled, a part of the liquid in the cylinder tube portion (22) enters the sub tank (S) and the rest is ejected from the nozzle (54) through the injection tube portion (20), and the trigger (62 ) Is released, the liquid in the sub tank (S) is ejected from the nozzle (54) through the injection cylinder (20). In the tank tubular wall (S _1), as well as opening the pressure release hole (16) which defines the limit position after the auxiliary plunger (S _2), on the outside of the circumferential main cylindrical portion (12), the pressure release longitudinal main cylindrical portion liquid return channel leading to the lower end of (12) (P _R), characterized in that the forming, trigger type liquid sprayer of claim 1, wherein the hole (16).   The trigger type liquid ejector according to claim 1 or 2, wherein a pressure accumulating valve (A) is provided in the nozzle (54). A lock mechanism (84) for restricting the backward movement of the auxiliary plunger (S ₂ );
The locking mechanism (84) includes a rotating body (84a) inserted in the rear half of the tank cylinder wall (S ₁ ) so as to be rotatable around a rotational axis in the front-rear direction and not to be able to be pulled out rearwardly. A rotary knob (84b) connected to (84a), and a spacer (84c) interposed between the front surface of the rotating body (84a) and the auxiliary plunger (S ₂ ),
When one of the rotating body (84a) and the spacer (84c) has a slit (90) in the front-rear direction, and the rotary knob (84b) is turned to the unlocked position, the rotating body (84a) and the spacer other (84c) is inserted into the cut-split (90), enables retraction of the auxiliary plunger (S _2), the rotating body when the rotating rotary knob portion (84b) to the locked position (84a) and The trigger type liquid ejector according to any one of claims 1 to 3, wherein the opposing surface of the spacer (84c) abuts to restrict the backward movement of the auxiliary plunger (S ₂ ). . The rotating body (84a) is formed as a cylindrical wall with an open front surface, and a slit is formed in a part of the cylindrical wall in the circumferential direction so that the slit (90a) and the slit (90b) of the cylindrical wall cut the slit. (90)
The spacer (84c) includes a rod (98) that can be fitted into the cylindrical hole (90a), and a baffle plate (attached to the side surface of the rod (98) that can be fitted into the slit (90b)). 99) and the trigger type liquid ejector according to claim 4. From the front surface of the rotating body (84a), a pressing protrusion (92) is provided in the vicinity of the slit (90b) so as to protrude forward, and when the rotating body (84a) is rotated, the pressing protrusion (92) The trigger according to claim 5, characterized in that said baffle plate (99) is formed so as to be able to contact said baffle plate (99), and said baffle plate (99) can be inserted into said slit (90b) in this contact state. Type liquid ejector.