JP5111078B2 - Trigger type liquid ejector - Google Patents

Description

  The present invention relates to a trigger type liquid ejector.

As this type of trigger type liquid ejector, for example, as shown in Patent Document 1 below, a mounting cylinder (cap) attached to the mouth of a container and a support cylinder (guide cylinder) provided in the mounting cylinder A stem that is inserted inward and stands upright so as to be able to be pushed in an upward biased state, a lever (trigger) that can be swung around a swinging shaft disposed on the rear side of the stem, and a stem that is moved along with the swing of the lever A configuration is known that includes a pump that is operated by being pushed down, a nozzle that is coupled to the upper portion of the stem, and a stopper that is rotatably provided around a rotation axis that is parallel to the swing axis of the lever. The stopper is interposed between a pair of side plates opposed to each other, a rotation shaft constructed between one end portions of the pair of side plate portions, and the other end portion of the pair of side plate portions, and is disposed at the upper end of the support cylinder. It is composed of a C-shaped locking plate (mounting portion) to be placed and an operation knob (arm portion, knob portion) protruding from the outer surface of the side plate portion. According to this trigger type liquid ejector, the stopper plate is erected and placed at the lock position, so that the locking plate is placed on the upper end of the support tube and the upper ends of the pair of side plate portions are the lower ends of the side wall portions of the lever. The lever is locked in contact with the stem, and the stem pressing operation is restricted. On the other hand, by tilting the stopper to the rear side and disposing it in the fully open position, the pair of side plate portions is detached from the lower end of the side wall portion of the lever, and the stem is pushed down.
JP 2004-209319 A

In recent years, there has been a demand for a trigger type liquid ejector capable of varying the amount of liquid ejected. In order to vary the amount of liquid ejected from the nozzle, it is necessary to vary the amount of liquid supplied by the pump, and in order to vary the amount of liquid supplied by the pump, it is necessary to vary the stroke of pushing down the stem.
However, in the above-described conventional trigger type liquid ejector, the stopper is only switched between the lock position and the fully open position, and the stem pressing stroke cannot be varied. Therefore, in the above-described conventional trigger type liquid ejector, the amount of liquid ejection cannot be varied.

  The present invention has been made in consideration of the above-described conventional problems, and an object of the present invention is to provide a trigger type liquid ejector that can vary the amount of liquid ejected.

The trigger type liquid ejector according to the present invention includes a stem that is erected so as to be able to be pushed in an upward biased state, a finger hook portion disposed on the front side of the stem, and a pressing portion that presses down the stem. A trigger disposed on the rear side of the stem and capable of swinging around a swing shaft; a pump that operates when the stem is pushed down by the pressing portion as the trigger swings; and an upper portion of the stem and linked nozzle, a stopper which is rotatable about a rotation axis parallel to the pivot axis, the trigger type liquid sprayer comprising a said stopper, depression of the stem in a state in which the pump is stopped A locking position for restricting the operation, and a push-down operation of the stem at a position lower than the restriction position of the stem at the locking position, tilted forward of the locking position A half-open position for regulating, than said locked position is tilted to the rear side, characterized in that it is switched on, a full open position for allowing the depressing operation the stem.

With such a feature, when the stopper is arranged at the lock position, the push-down operation of the stem is restricted and the pump cannot be operated. As a result, for example, the trigger is prevented from swinging due to an external force or the like acting unexpectedly, thereby preventing liquid from being ejected.
In addition, if the stopper is tilted forward and placed in the half-open position, the stem can be pushed down, but the stem push-down operation is restricted at a position below the restriction position in the lock position, and the stem may be pushed down to the end. Can not. On the other hand, when the stopper is tilted rearward and disposed at the fully open position, the stem is allowed to be pushed down, and the stem can be pushed down to the end. That is, the stem pressing stroke is shorter in the half-open position than in the fully-open position.

  In addition, the trigger type liquid ejector according to the present invention is disposed at the half-open position and a first locking portion that locks the trigger side plate portion in a state where the trigger is ejected to the stopper. It is preferable that a second locking portion for locking the flange portion protruding from the upper outer peripheral surface of the stem in a state is provided.

As a result, when the stopper is disposed at the lock position, the first locking portion locks the trigger, the swing operation of the trigger is prevented, and the stem push-down operation is restricted.
On the other hand, when the stopper is disposed at the half-open position, the first locking portion is detached from the trigger, and the trigger can swing. When the trigger swings, the stem is pushed down with the swing. When the stem is pushed down to a certain point, the second locking portion locks the flange portion, the trigger can no longer swing, and the stem pressing operation is restricted halfway.
Further, when the stopper is disposed at the fully open position, the second locking portion is disengaged from the flange portion so that the trigger can be swung, and the stem pressing operation is allowed.

  According to the trigger type liquid ejector according to the present invention, the stem push-down stroke is changed by switching the stopper between the half-open position and the fully-open position, so that the liquid ejection amount can be varied.

DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of a trigger type liquid ejector according to the present invention will be described with reference to the drawings.
FIG. 1 is a side view of a trigger type liquid ejector 1 as an example of the present invention, FIG. 2 is a sectional view of the trigger type liquid ejector 1 in a locked state, and FIG. 3 is a trigger type liquid ejector in a half-open state. 4 is a sectional view of the trigger type liquid ejector 1 in a fully opened state, and FIG. 5 is a perspective view showing a stopper 7 which will be described later.
A chain line L shown in FIG. 2 is a central axis line of the stem 3 to be described later, and is simply referred to as a “central axis line L”. Further, in the present embodiment, the direction (left side in FIG. 1) in which a nozzle 6 described later is directed is defined as the front side, and the opposite side (right side in FIG. 1) is defined as the rear side. The upper side (upper side in FIG. 1) is the upper side, the opposite side (lower side in FIG. 1) is the lower side, and the directions orthogonal to the front-rear direction and the vertical direction (direction perpendicular to the paper surface in FIG. 1) are the left-right direction.

  As shown in FIGS. 1 to 4, the trigger type liquid ejector 1 includes a cap 2 that is attached to a mouth portion of a container (not shown), a stem 3 that can be pushed in an upward biased state, and a stem 3 that is pushed down. A trigger 4 for operating the pump 4, a pump 5 that operates when the stem 3 is pushed down as the trigger 4 is swung, a nozzle 6 that is connected to the upper portion of the stem 3 and ejects the liquid supplied from the pump 5, and a stem 3, and a stopper 7 that restricts the pushing-down operation of the third press.

  The cap 2 is a cap that is screwed into a container opening (not shown) having a male screw formed on the outer peripheral surface. The cap 2 is disposed perpendicularly to the central axis L, and has an annular ceiling wall portion 20 having a circular opening formed in the central portion thereof, and hangs along the central axis L from the outer edge portion of the ceiling wall portion 20. The lower cylinder part 21 having an internal thread formed on the inner peripheral surface, and the upper part from the center part of the top wall part 20 are erected upward along the central axis L, and communicated with the opening at the center part of the top wall part 20. The upper cylinder part 22, a guide cylinder 23 erected upward from the upper end of the upper cylinder part 22 along the central axis L, and communicated with the upper cylinder part 22, and behind the upper cylinder part 22 and the guide cylinder 23 And a trigger support portion 24 disposed.

  The trigger support portion 24 protrudes rearward from the outer peripheral surfaces of the upper tube portion 22 and the guide tube 23, and has a pair of side wall portions 25 arranged to face each other with a space therebetween, and a rear end of the pair of side wall portions 25. And a rear wall portion 26 formed therebetween. A bearing 25 a notched in a substantially U shape is formed in the front portion at the upper end of the side wall portion 25. A hemispherical projection 25b is provided on the outer surface of the side wall 25 at a position behind the bearing 25a. In addition, an oval concave portion 25d is formed on the inner side surface of the side wall portion 25 at a position obliquely above and ahead of the bearing 25a. A protruding portion 25 c protruding upward is formed at the rear portion of the upper end of the side wall portion 25. A cylindrical rocking shaft 27 extending in the left-right direction protrudes from the outer surface of the protruding portion 25c.

  The stem 3 is a cylindrical member that extends along the central axis L. The stem 3 is inserted inside the guide tube 23 so as to be movable in the vertical direction. The upper portion of the stem 3 protrudes upward from the upper end of the guide tube 23, and the lower portion of the stem 3 is connected to the guide tube 23. It protrudes downward from the lower end and is disposed in the upper tube portion 22. At the upper end portion of the stem 3, a head portion 30 with the upper end closed is provided. A nozzle connecting cylinder portion 31 communicating with the inside of the stem 3 protrudes forward from the front surface of the head portion 30. In addition, columnar pressed parts 32 protrude from the left and right side surfaces of the head 30. Further, a rectangular block-shaped flange portion 33 is provided on the rear surface of the head 30 so as to protrude rearward. The flange portion 33 is provided at the lower end portion of the head portion 30, and the lower end surface of the flange portion 33 is formed flush with the lower end surface of the head portion 30.

  The nozzle 6 is for ejecting liquid toward the front, and is connected to the front end of the nozzle connection cylinder portion 31 and extends forward, and a nozzle hole (not shown) is formed on the front end surface. Has been.

  The trigger 4 is a trigger member that is operated by pulling backward with a finger or the like, and is attached to the trigger support portion 24 via the swing shaft 27, and is provided to be swingable around the swing shaft 27. . The trigger 4 includes a finger hooking portion 41 on which a finger or the like is hung, and a pressing portion 42 for pressing down the stem 3. The finger hook portion 41 is disposed on the front side of the stem 3 and hangs diagonally downward toward the front. The pressing portion 42 is a pair of plate-like portions that are disposed on the left and right sides of the head 30 of the stem 3 and face each other, and the pressed portion 32 is fitted to the lower end of the pressing portion 42 so as to be slidable in the circumferential direction. A circular arc-shaped notch 42a is formed. The lower end 42b on the rear side of the pressing part 42 extends downward from the lower end on the front side.

  More specifically, the trigger 4 is an outer shell-shaped member that covers the head 30 of the stem 3, and a top plate portion 43 disposed above the head 30 and a rear end from the rear end of the top plate portion 43. A rear plate portion 44 extending obliquely downward toward the front, a front plate portion 45 extending obliquely downward from the front end of the top plate portion 43, and hanging from the left and right side ends of the top plate portion 43, respectively. And a pair of side plate portions 46 facing each other. A long hole 45a that is long in the vertical direction is formed in the upper portion of the front plate portion 45, and the nozzle 6 is inserted into the long hole 45a. The pressing portions 42 described above are provided on the inner side surfaces of the pair of side plate portions 46, respectively. In addition, the rear portions of the pair of side plate portions 46 are respectively disposed to face the outer surfaces of the protruding portions 25c of the trigger support portion 24, and the swing shaft 27 slides in the circumferential direction on the rear portions of the pair of side plate portions 46. A shaft hole 46a that is inserted through is formed. A semicircular arc-shaped recess 46b is formed at the lower end of the pair of side plate portions 46 at a position substantially immediately above the bearing 25a. The lower part of the front plate part 45 is the above-described finger hook part 41.

  The pump 5 is for supplying the liquid accommodated in a container (not shown) to the nozzle 6, and is mounted inside the cap 2. The schematic configuration of the pump 5 includes a cylinder 50 extending along the central axis L, a piston 51 having a double cylinder structure disposed inside the cylinder 50 and in sliding contact with the inner peripheral surface of the cylinder 50, A core rod 52 extending along the central axis L, a coil spring 53 accommodated in a cylinder 50, and a spherical valve body 54 are provided.

  The cylinder 50 includes a cylindrical cylinder body 50a, a flange portion 50b protruding radially outward from the outer peripheral surface of the intermediate portion of the cylinder body 50a, a valve seat portion 50c suspended from the lower end of the cylinder body 50a, A connecting cylinder 50d that is suspended from the lower end of the valve seat portion 50c. The upper part of the cylinder body 50 a is fitted in the upper cylinder part 22 of the cap 2, and the lower part of the cylinder body 50 a is arranged inside the lower cylinder part 21 of the cap 2. The flange portion 50 b is formed over the entire circumference of the cylinder body 50 a and is in contact with the lower surface of the top wall portion 20 of the cap 2. A ring-shaped packing 50e is disposed on the lower surface of the flange portion 50b. The lower portion of the valve seat portion 50c has a tapered shape that is gradually reduced in diameter as it goes downward. The end of the tube 8 accommodated in a container (not shown) is fitted in the connecting cylinder 50d.

The piston 51 is fitted to the lower end portion of the stem 3 and can slide along the inner peripheral surface of the cylinder 50 as the stem 3 moves in the vertical direction.
The core rod 52 is a rod-shaped member inserted into the piston 51. The upper part of the core rod 52 is inserted into the stem 3. An enlarged diameter portion 52a is formed in the lower portion of the core rod 52, and a plurality of vertical ribs 52b placed on the bottom surface of the cylinder body 50a are spaced apart in the circumferential direction at the lower end portion of the enlarged diameter portion 52a. It is arranged open.
The coil spring 53 is interposed between the piston 51 and the vertical rib 52 b of the core rod 52.
The valve body 54 is accommodated inside the valve seat portion 50c and is detachably disposed on a tapered surface in the valve seat portion 50c.

  As shown in FIGS. 1 to 5, the stopper 7 is a member provided to be rotatable around a rotation shaft 70 parallel to the swing shaft 27 of the trigger 4. The stopper 7 is tilted further forward than the lock position (position shown in FIG. 2) for restricting the push-down operation of the stem 3 in a state where the pump 5 is stopped, and more than the restriction position of the stem 3 at the lock position. A half-open position (position shown in FIG. 3) that restricts the push-down operation of the stem 3 at a lower position, and a fully-open position (position shown in FIG. 4) that is tilted rearward from the lock position and allows the push-down action of the stem 3 And can be switched to.

  More specifically, the stopper 7 is formed between a pair of side plate portions 71 arranged opposite to each other, a rotating shaft 70 installed between one end portions of the pair of side plate portions 71, and the other end portions of the pair of side plate portions 71. Interposed mounting part 72, arm part 73 protruding from the outer surface of side plate part 71, and knob part 74 provided at the upper end of arm part 73 are provided.

  The pair of side plate portions 71 are plate-shaped portions having one end semi-circular and the other end rounded rectangular, and are disposed outside the pair of side wall portions 25 of the trigger support portion 24 in plan view. And disposed inside the pair of side plate portions 46 of the trigger 4 described above. One end portion of the side plate portion 71 is disposed opposite to the outer side surfaces of the pair of side wall portions 25 of the trigger support portion 24, and the inner side surface (the surface facing the side wall portion 25) of one end portion of the side plate portion 71 is illustrated in FIG. As shown in FIG. 2, when the stopper 7 is disposed at the lock position (hereinafter referred to as “locked”), a substantially fan-shaped first recess 71a into which the above-described protrusion 25b is fitted is formed. Further, on the inner side surface of the intermediate portion of the side plate portion 71, when the stopper 7 is disposed at the fully open position as shown in FIG. 4 (hereinafter referred to as fully opened), the above-described protrusion 25b is fitted approximately. A circular second depression 71b is formed.

  The rotating shaft 70 has a round bar shape extending in the left-right direction, and both end portions of the rotating shaft 70 are fitted into bearings 25a formed on the trigger support portion 24 so as to be rotatable. The stopper 7 is attached to the cap 2 (trigger support portion 24) so as to be rotatable around the rotation shaft 70.

  The arm portion 73 is a plate-like member protruding perpendicularly to the outer surface of the side plate portion 71, and extends in the vertical direction when locked. The upper end portion of the arm portion 73 serves as a first locking portion 75 that locks the side plate portion 46 of the trigger 4 when the stopper 7 is locked. That is, at the time of locking, the lower end surface of the side plate portion 46 of the trigger 4 is in contact with the upper end surface of the arm portion 73. A projecting portion 73a having a semi-cylindrical shape that is fitted into the recessed portion 46b of the side plate portion 46 of the trigger 4 in a locked state is provided on the upper end surface of the arm portion 73.

  The mounting portion 72 has a trapezoidal block shape having a right-angled trapezoidal cross-sectional view. When the stopper 7 is disposed at a half-open position as shown in FIG. It is to be placed. The mounting portion 72 serves as a second locking portion 76 that locks the flange portion 33 in the half-opened state. That is, in the half-open state, the front surface of the mounting portion 72 is slidably contacted with the outer peripheral surface of the stem 3, and the flange portion 33 of the pressed stem 3 is brought into contact with the upper surface of the mounting portion 72. On the lower surface of the mounting portion 72, a pair of left and right hanging wall portions 77 arranged opposite to each other are provided. The pair of vertical wall portions 77 are disposed inside the pair of side wall portions 25 of the trigger support portion 24 described above in a plan view, and are disposed on the inner side surfaces of the pair of side wall portions 25 of the trigger support portion 24 when half open. Opposed. On the outer side surfaces of the pair of vertical wall portions 77, an elliptical convex portion 77a is provided so as to be fitted into the concave portion 25d of the side wall portion 25 of the trigger support portion 24 when half-opened.

  The knob portion 74 is a disc-like member standing on the upper end surface on the distal end side of the arm portion 73, and is disposed to face the outer surface of the side plate portion 46 of the trigger 4 with a space therebetween.

  Next, the operation of the trigger type liquid ejector having the above-described configuration will be described.

  First, before using the trigger type liquid ejector 1, as shown in FIG. 2, the stopper 7 is arranged at the lock position with the pump 5 stopped. More specifically, the piston 51 is biased upward by the coil spring 53, the upper end surface of the piston 51 is brought into contact with the lower end surface of the guide cylinder 23, and the pump 5 is stopped. In this state, the stopper 7 is disposed at a substantially vertical lock position. At this time, the first locking portion 75 comes into contact with the lower end of the side plate portion 46 of the trigger 4, and the downward swing of the trigger 4 is restricted, and the push-down operation of the stem 3 by the pressing portion 42 is restricted. As a result, the pump 5 is locked in a stopped state, and the pump 5 cannot be operated. When the stopper 7 is disposed at the lock position, the protrusion 25b of the trigger support portion 24 is fitted into the first recess 71a of the stopper 7, and the convex portion 73a of the arm portion 73 is the side plate of the trigger 4. It is fitted in the recess 46 b of the portion 46.

  Next, as shown in FIG. 3, the stopper 7 is tilted forward and disposed at the half-open position. More specifically, the stopper 7 is rotated around the rotation shaft 70 toward the front side until the placement portion 72 is placed on the upper end of the guide tube 23. As a result, the locking of the trigger 4 by the first locking part 75 is released, the downward swing of the trigger 4 is allowed, and the stem 3 can be pushed down. At this time, since the mounting portion 72 is mounted on the upper end of the guide tube 23 and is in sliding contact with the outer peripheral surface of the stem 3, the stopper 7 is disposed in the half-open position in a stable state. Further, when the stopper 7 is disposed at the half-open position, the convex portion 77a of the hanging wall portion 77 is fitted into the concave portion 25d of the side wall portion 25 of the trigger support portion 24, and a click feeling is generated. Thereby, it is recognized by touch that the stopper 7 is disposed at the half-open position.

  Next, the trigger 4 is pulled to eject liquid from the tip of the nozzle 6. More specifically, a finger or the like is put on the finger hooking portion 41 of the trigger 4 to pull the trigger 4 backward and swing it. As the trigger 4 swings, the pressing portion 42 presses the pressed portion 32 of the stem 3 downward, and the stem 3 is pushed down. At this time, the flange portion 33 is locked by the second locking portion 76, and the further pressing operation of the stem 3 is restricted. In other words, the stem 3 can be pushed down in the half-open state, but the pushing-down operation of the stem 3 is restricted at a position below the restriction position at the time of locking, and the stem 3 cannot be pushed down to the end. Specifically, the pressing stroke of the stem 3 when half-opened is set to about half of the pressing stroke when fully opened, which will be described later.

  By the above-described pushing-down operation of the stem 3, the piston 51 connected to the lower end of the stem 3 moves downward while sliding on the inner peripheral surface of the cylinder 50. At this time, since the valve body 54 is seated on the tapered lower inner peripheral surface of the valve seat portion 50c of the cylinder 50 and the lower portion of the valve seat portion 50c is closed, the piston 51 is moved downward as described above. By moving, the inside of the cylinder body 50a is pressurized. As a result, the liquid in the cylinder body 50a flows into the stem 3 through the gap between the outer peripheral surface of the core rod 52 and the inner peripheral surface of the piston 51, reaches the nozzle 6 through the stem 3, and reaches the nozzle 6 It is ejected from a nozzle hole (not shown) at the tip of the nozzle. At this time, since the push-down stroke of the stem 3 is shorter than when fully opened, the amount of liquid supplied by the pump 5 is smaller than when fully opened, and a small amount of liquid is ejected from the nozzle 6. Specifically, the pressing stroke of the stem 3 at the time of half opening is about half of the pressing stroke at the time of full opening, and the amount of liquid ejected at the time of half opening is about half of the amount of ejection at the time of full opening.

  Next, when the finger or the like that pulled the trigger 4 is removed, the piston 51 is moved upward by the biasing force of the coil spring 53. As a result, the inside of the cylinder body 50a is depressurized, the valve body 54 is lifted, the lower part of the valve seat 50c is opened, and the liquid in the container (not shown) flows into the valve seat 50c through the tube 8. Then, the gas flows into the cylinder body 50a from the valve seat portion 50c through the longitudinal ribs 52b of the core rod 52. Further, as the stem 3 moves upward as the piston 51 moves upward, the pressed part 32 presses the pressing part 42 upward, and the trigger 4 moves forward and returns to its original position.

  On the other hand, as shown in FIG. 4, the stopper 7 is tilted rearward from the above-described lock position and disposed at the fully open position. More specifically, the stopper 7 is rotated around the rotation shaft 70 toward the rear side until the mounting portion 72 contacts the upper end of the side wall portion 25 of the trigger support portion 24. As a result, the locking of the trigger 4 by the first locking portion 75 or the second locking portion 76 is released, the trigger 4 is allowed to be pulled backward and swinged, and the stem 3 is moved to the end. It can be pushed down. Moreover, when the stopper 7 is arrange | positioned in a fully open position, the protrusion 25b is engage | inserted in the 2nd hollow part 71b, and a click feeling arises. Thereby, it is recognized by touch that the stopper 7 is disposed at the fully open position.

  Next, the trigger 4 is pulled to eject liquid from the tip of the nozzle 6. At this time, since the stopper 7 is disposed at a position where it does not interfere with the trigger 4 or the stem 3, the stem 3 is pushed down to a position where the lower end surface of the head 30 contacts the upper end surface of the guide tube 23. By the pushing-down operation of the stem 3 described above, the piston 51 moves downward to supply the liquid to the nozzle 6, and the liquid is ejected from a nozzle hole (not shown) of the nozzle 6. At this time, since the push-down stroke of the stem 3 is longer than when half-opened, the amount of liquid supplied by the pump 5 is larger than when half-opened, and a large amount of liquid is ejected from the nozzle 6.

Next, by removing the finger or the like that pulled the trigger 4, the trigger 4 is returned to its original position, and the liquid in the container (not shown) is caused to flow into the cylinder body 50 a.
After the trigger type liquid ejector 1 is used, the stopper 7 is swung to the lock position, and the pump 5 is locked in the stopped state. At this time, when the stopper 7 is disposed at the lock position, the protrusion 25 b of the trigger support portion 24 is fitted into the first recess portion 71 a of the stopper 7. Thereby, when the stopper 7 is arranged at the lock position, a click feeling is generated, and it is recognized by touch that the stopper 7 is arranged at the lock position.

  According to the trigger type liquid ejector 1 having the above-described configuration, the pressing stroke of the stem 3 is changed by switching the stopper 7 between the half-open position and the fully-open position, so that the liquid ejection amount can be changed. .

  Further, according to the trigger type liquid ejector 1 described above, the stopper 7 is engaged with the first locking portion 75 for locking the side plate portion 46 of the trigger 4 in the locked state, and the stem 3 in the half-opened state. Since the second locking portion 76 that locks the flange portion 33 is provided, the trigger 4 can be reliably locked and the push-down operation of the stem 3 can be reliably regulated.

As mentioned above, although embodiment of the trigger type liquid ejector which concerns on this invention was described, this invention is not limited to above-described embodiment, In the range which does not deviate from the meaning, it can change suitably.
For example, in the above-described embodiment, the nozzle 6 is directed forward, but in the present invention, the nozzle 6 may be directed upward, obliquely upward, or in another direction.

  In the above-described embodiment, the upper end portion of the arm portion 73 of the stopper 7 is the first locking portion 75 that locks the trigger 4 at the time of locking, and the mounting portion 72 is half open. In some cases, the second locking portion 76 that locks the flange portion 33 is used. However, in the present invention, the shapes and positions of the first and second locking portions can be appropriately changed. For example, the upper end portion of the mounting portion 72 and the upper end portion of the side plate portion 71 may be the first locking portion, or the side plate portion 71 and the arm portion 73 are provided with the second locking portion. May be.

  In the above-described embodiment, the side plate portion 46 of the trigger 4 is locked when the stopper 7 is disposed at the locked position, and the flange portion 33 is locked when the stopper 7 is disposed at the half-open position. However, according to the present invention, the stopper 7 can be used to lock the portions other than the side plate portion 46 and the flange portion 33. For example, the pressing portion 42 may be locked by the stopper 7.

  Further, in the above-described embodiment, the push-down stroke of the stem 3 at the half-open time is about half of the push-down stroke at the full open, and the liquid ejection amount at the half open is about half of the jet amount at the full open. However, the present invention is not limited to this, and it is only necessary that the pressing stroke of the stem 3 at the half-open time is shorter than the pressing stroke at the fully-opened time, and the amount of liquid ejected at the half-opening is smaller than the amount ejected at the fully-opening time. . For example, the pressing stroke of the stem 3 at the time of half opening may be about one third of the pressing stroke at the time of full opening, and the amount of liquid ejected at the time of half opening may be about one third of the amount of ejection at the time of full opening. .

  In addition, in the range which does not deviate from the main point of this invention, it is possible to replace suitably the component in above-mentioned embodiment with a well-known component, and you may combine the above-mentioned modification suitably.

It is a side view of the trigger type liquid ejector for demonstrating embodiment of this invention. It is sectional drawing of the trigger type liquid ejector of the locked state for demonstrating embodiment of this invention. It is sectional drawing of the trigger type | formula liquid ejector of the half-open state for demonstrating embodiment of this invention. It is sectional drawing of the trigger type liquid ejector of the fully open state for demonstrating embodiment of this invention. It is a perspective view of the stopper for demonstrating embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Trigger type liquid ejector 3 Stem 4 Trigger 5 Pump 6 Nozzle 7 Stopper 27 Oscillating shaft 33 Flange part 41 Finger part 42 Depressing part 70 Rotating shaft 75 First latching part 76 Second latching part

Claims (2)

Swing disposed on the rear side of the stem, having a stem standing upright so as to be able to be pushed in an upward biased state, a finger hook portion disposed on the front side of the stem, and a pressing portion for pushing down the stem A trigger that can swing around an axis, a pump that operates when the stem is pushed down by the pressing portion as the trigger swings, a nozzle that is connected to the top of the stem, and the swing shaft A trigger type liquid ejector comprising: a stopper provided rotatably around a parallel rotation axis;
The stopper is
A locking position for restricting the depression operation the stem in a state in which the pump is stopped,
A half-open position that is tilted forward from the lock position and restricts the pushing-down operation of the stem at a position below the restriction position of the stem at the lock position;
A fully open position that is tilted rearward of the lock position and allows the stem to be pushed down;
Trigger-type liquid ejector characterized by being switched to In the trigger type liquid ejector according to claim 1,
The stopper is provided with a first locking portion for locking the side plate portion of the trigger in a state where the stopper is disposed at the locking position, and a protruding portion on an upper outer peripheral surface of the stem in a state where the stopper is disposed at the half-open position. And a second locking portion for locking the flange portion, respectively.

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