JP6609516B2 - Trigger type liquid ejector - Google Patents

Description

  The present invention relates to a trigger type liquid ejector.

Conventionally, a trigger type liquid ejector as shown in Patent Document 1 below is known. The trigger-type liquid ejector includes an ejector body that is mounted on a container body that contains a liquid, and a nozzle that is disposed on the front side of the ejector body and that ejects liquid toward the front. And a section. The main body of the ejector extends in the vertical direction and sucks up the liquid in the container body, and the injection that extends forward from the vertical supply cylinder and communicates with the inside of the vertical supply cylinder A cylindrical portion. The ejector body further includes a trigger mechanism. The trigger mechanism has a trigger portion that is arranged to be movable rearward in a forward biased state. The trigger mechanism causes the liquid to be introduced into the injection cylinder part from the vertical supply cylinder part and to be ejected from the injection cylinder part toward the ejection hole side by the rearward movement of the trigger part.
Further, the nozzle part of the trigger type liquid ejector includes a pressure accumulating valve provided so as to be able to move back and forth in a state of being forwardly biased, and a valve seat part that is freely closed when the front end of the pressure accumulating valve is seated. A nozzle body. The pressure accumulating valve has two cylindrical portions with different inner diameters. When the pressure of the liquid contacting the pressure accumulating valve exceeds a predetermined pressure, the pressure accumulating valve resists the forward urging force due to the difference in pressure receiving area between the two cylindrical portions. And retreat. Thereby, a valve seat part is released and the contents are injected from an ejection hole.

JP 2011-177630 A

In the conventional pressure accumulating trigger type liquid ejector, the content is easily injected in a desired manner by stabilizing the pressure of the content when ejected from the ejection hole to a high level by the pressure accumulating valve. For this reason, the contents can be ejected in the form of a fine mist. Such an injection state is suitable for the purpose of floating the contents in the space for the purpose of deodorization or aroma, for example. On the other hand, in order to operate the pressure accumulating valve, there is a problem that the operation force of the trigger portion is increased.
On the other hand, in this type of trigger type liquid ejector, the contents may be ejected without using an accumulator valve. In such a case, it can be used, for example, to inject the contents directly onto the object. In this case, since the pressure accumulation valve is not used, the operating force can be reduced. From the above, there is a demand for a trigger type liquid ejector that can switch between a pressure accumulation mode that uses a pressure accumulation valve and a non-pressure accumulation mode that does not use a pressure accumulation valve, depending on the application.

  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 that can easily switch between a pressure accumulation mode and a non-pressure accumulation mode according to the application.

  In order to solve the above-described problems, a trigger type liquid ejector according to the present invention is provided on a front side of an ejector body mounted on a container body in which a liquid is stored, and ejects the liquid. A nozzle part having an ejection hole formed therein, the ejector body extending in a vertical direction and arranged in front of the longitudinal supply cylinder part, and sucks up the liquid in the container body An injection cylinder part that guides the liquid in the vertical supply cylinder part to the ejection hole, and a trigger part that is disposed in front of the vertical supply cylinder part so as to be movable rearward in a forward-biased state. A trigger mechanism that causes the liquid to flow from the inside of the vertical supply cylinder part to the side of the ejection hole through the inside of the injection cylinder part by moving the part backward, and the nozzle part is moved forward and backward in front of the injection cylinder part Nozzle book provided so as to be rotatable around a rotation axis extending in the direction And a pressure accumulating valve provided between the nozzle body and the injection cylinder portion so as to be able to move back and forth in a state in which the rotation around the rotation axis is restricted and in a state of being biased forward, The nozzle body includes a valve seat portion that communicates with the ejection hole and is openably closed when the front end portion of the pressure accumulating valve is seated, and the nozzle body includes the rotation of the nozzle body. An engaging portion is formed that engages with an engaged portion formed on the pressure accumulating valve with the rotation about the dynamic axis to retract the pressure accumulating valve and communicate the inside of the valve seat portion with the ejection hole. It is characterized by.

According to the trigger type liquid ejector of the present invention, since the pressure accumulating valve that can move back and forth in the forward biased state is provided, in the pressure accumulating mode, the pressure of the liquid when ejected from the ejection hole is made high and stable. The liquid can be ejected in the desired manner.
On the other hand, since the nozzle body is provided so as to be rotatable around the rotation axis, and the pressure accumulation valve is restricted from rotating around the rotation axis, when the nozzle body is rotated, the pressure accumulation valve and the nozzle body are separated. It rotates relatively around the rotation axis. With this relative rotation, the engaging portion formed on the nozzle body and the engaged portion formed on the pressure accumulating valve engage with each other to retract the pressure accumulating valve. Thereby, the inside of the valve seat part which the front-end part of an accumulator valve seats and the ejection hole can communicate, and it can be set as the non-accumulation mode which an accumulator valve does not operate | move.
As described above, according to the present invention, it is possible to provide a trigger type liquid ejector that can switch between the pressure accumulation mode and the non-pressure accumulation mode by an easy operation of rotating the nozzle body.

  Here, the nozzle body has an engagement cylinder portion extending in the front-rear direction and opening toward the rear, and the pressure accumulating valve is an annular shape facing the rear end opening edge of the engagement cylinder portion in the front-rear direction. The engaging portion protrudes rearward from the rear end opening edge of the engaging tube portion, and the engaged portion protrudes forward from the front surface of the flange portion. Also good.

  In this case, the engaging portion that protrudes rearward from the rear end opening edge of the engaging cylinder portion of the nozzle body and the engaged portion that protrudes forward from the front surface of the flange portion of the pressure accumulating valve are mutually engaged. Combined, it is possible to retreat the accumulator valve with relative rotation of the accumulator valve and the nozzle body, and easily configure a trigger type liquid ejector that can switch between the accumulator mode and the non-accumulator mode Can do.

  Further, at least one of the engaging portion and the engaged portion is opposed to the other in the circumferential direction around the rotation axis, and gradually increases toward the tip along the rotation axis direction. An inclined portion that is inclined in a direction away from the other may be formed.

  In this case, when the nozzle body is rotated, the pressure accumulating valve moves backward by sliding the other on the inclined portion formed in at least one of the engaging portion and the engaged portion. The pressure accumulation mode and the non-accumulation mode can be reliably switched with the movement.

  ADVANTAGE OF THE INVENTION According to this invention, the trigger type liquid ejector which can be switched easily whether to operate an accumulator valve according to a use can be provided.

It is a longitudinal cross-sectional view of the trigger type liquid ejector which concerns on this embodiment. It is a longitudinal cross-sectional view of the nozzle part of FIG. 1, Comprising: It is a figure which shows the state of a pressure accumulation mode. FIG. 3 is a development view around the rotation axis of the engaging portion and the engaged portion in the nozzle portion shown in FIG. 2. It is a longitudinal cross-sectional view of the nozzle part of FIG. 1, Comprising: It is a figure which shows the state of a non-accumulation mode. FIG. 5 is a development view around the rotation axis of the engaging portion and the engaged portion in the nozzle portion shown in FIG. 4.

Hereinafter, an 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 FIG. 1, a trigger type liquid ejector 1 according to this embodiment is mounted on a container body A that contains a liquid, and includes an ejector body 2 having a vertical supply cylinder portion 10 that sucks the liquid, and an ejection hole 4. And a nozzle portion 3 attached to the ejector body 2.
In addition, each component of the trigger type liquid ejector 1 is formed by injection molding using a synthetic resin unless otherwise specified.

Here, in this embodiment, the central axis of the vertical supply cylinder portion 10 is the axis O1, and the direction along the axis O1 is referred to as the vertical direction, and the container body A side is the lower side along the vertical direction, and the opposite side is the vertical direction. It is called the upper side. One direction orthogonal to the axis O1 is referred to as the front-rear direction, and the direction orthogonal to the vertical direction and the front-rear direction is referred to as the left-right direction.
In addition, the nozzle unit 3 includes a nozzle body 22 that is rotatably arranged around a rotation axis O2 that extends in the front-rear direction, and a state in which the rotation around the rotation axis O2 is restricted in the nozzle body 22 and the front side. And a pressure accumulating valve 23 provided so as to be able to move back and forth in an energized state. In the present embodiment, in a plan view viewed from the front-rear direction, a direction orthogonal to the rotation axis O2 is referred to as a radial direction, and a direction around the rotation axis O2 is referred to as a circumferential direction.

The ejector body 2 includes the vertical supply cylinder portion 10 extending in the vertical direction, and an injection cylinder portion that extends from the vertical supply cylinder portion 10 along the front-rear direction and communicates with the inside of the vertical supply cylinder portion 10. 11 and is formed in an L shape in a side view as viewed from the left-right direction.
In the front-rear direction, the direction in which the injection cylinder part 11 extends from the vertical supply cylinder part 10 is referred to as the front side or the front side, and the opposite direction is referred to as the rear side or the rear side.

(Vertical supply tube)
The vertical supply cylinder portion 10 includes an outer cylinder 12 and an inner cylinder 13 fitted into 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 diameter smaller than that of the large-diameter portion 12a, an upper end portion of the large-diameter portion 12a, and a lower end of the small-diameter portion 12b. An annular connecting part 12c that connects the parts, and a top wall part 12d that closes the upper end part of the small diameter part 12b. The top wall portion 12d covers an upper portion of a suction valve 36 described later. The lower end portion of the small diameter portion 12b protrudes downward from the annular coupling portion 12c.

  The inner cylinder 13 includes a large-diameter portion 13a into which the large-diameter portion 12a of the outer cylinder 12 is fitted, a small-diameter portion 13b that is disposed above the large-diameter portion 13a and has a smaller diameter than the large-diameter portion 13a, and a large diameter A flange portion 13c that connects the upper end portion of the diameter portion 13a and the lower end portion of the small diameter portion 13b, and is formed in a two-stage cylindrical shape having a diameter reduced from below to above. A reduced diameter portion 13g having an outer diameter smaller than that of the small diameter portion 13b is formed in an upper portion of the small diameter portion 13b. A cutout portion 13f is formed in a front portion of the upper end portion of the reduced diameter portion 13g.

In the small diameter portion 13b of the inner cylinder 13, an upper portion of a pipe 15 disposed in the container body A and having a lower end opening located at a bottom portion (not shown) of the container body A is fitted. The flange portion 13c of the inner cylinder 13 is positioned below the annular coupling portion 12c of the outer cylinder 12 in a state where a clearance S1 is secured between the flange portion 13c and the annular coupling portion 12c of the outer cylinder 12. In the large diameter portion 13 a of the inner cylinder 13, an annular flange portion 13 d that protrudes outward in the radial direction is formed at a portion protruding downward from the large diameter portion 12 a of the outer cylinder 12. The flange portion 13d is disposed in the upper end portion of the mounting cap 14 that is mounted (for example, screwed) to the mouth portion A1 of the container body A, and locks the upper end portion of the mounting cap 14 around its axis. The collar portion 13d is sandwiched in the vertical direction by the mounting cap 14 and the upper end opening edge at the mouth portion A1 of the container body A.
In addition, the axis O1 of the vertical supply cylinder portion 10 configured by the outer cylinder 12 and the inner cylinder 13 is eccentric to the rear side with respect to the container axis of the container body A.

An annular tapered cylindrical portion 35 that protrudes inward is formed on a portion of the inner peripheral surface of the inner cylinder 13 positioned above the upper end of the pipe 15.
The taper cylinder part 35 is gradually reduced in diameter as it goes downward. A spherical suction valve 36 that is detachably seated on the inner peripheral surface of the tapered cylindrical portion 35 is disposed inside the tapered cylindrical portion 35. In the inner cylinder 13, the suction valve 36 communicates and blocks a space located above the tapered cylinder part 35 and a space located below the taper cylinder part 35.

As shown in FIG. 1, a cylinder cylinder portion 40 that projects forward is formed integrally with the outer cylinder 12 at a portion located below the injection cylinder portion 11.
The cylinder cylinder portion 40 is open toward the front, and is partially formed integrally with the annular coupling portion 12 c in the outer cylinder 12.

(Injection tube)
The injection cylinder part 11 projects forward from the vertical supply cylinder part 10, and the rear end part is connected to the front side of the upper end part of the vertical supply cylinder part 10. The inside of the injection cylinder part 11 communicates with the inside of the vertical supply cylinder part 10 through a discharge hole 16 formed in the outer cylinder 12 and a notch part 13f formed in the inner cylinder 13.

(Trigger mechanism)
The ejector body 2 extends downward from the injection cylinder portion 11 and is disposed in the front-rear direction in conjunction with the trigger portion 51 that is swingable rearward in a forward-biased state. A piston 52 that moves, a cylinder 53 that pressurizes and depressurizes as the piston 52 moves, an elastic plate portion 54 that biases the trigger portion 51 forward, and the vertical supply cylinder portion 10 and the injection cylinder portion 11. And a cover body 55 that covers the whole from at least the upper side and the left-right direction.

  The suction valve 36, the trigger portion 51, the piston 52, the cylinder 53, and the elastic plate portion 54 described above allow the liquid in the container body A to be injected from the vertical supply cylinder portion 10 into the injection cylinder portion by swinging the trigger portion 51 backward. A trigger mechanism 50 is configured to be introduced into the injection cylinder 11 and injected into the injection hole 4 from the injection cylinder portion 11.

  The cylinder 53 projects forward from the vertical supply cylinder portion 10 and communicates with the inside of the vertical supply cylinder portion 10 through a through hole 66 described later. The cylinder 53 has an outer cylinder part 60 that opens forward, a rear wall part 61 that closes the rear opening part of the outer cylinder part 60, and a front end that protrudes forward from the central portion of the rear wall part 61. The piston guide 62 is closed.

  The piston guide 62 has an inner side opened rearward, and a fitting cylinder portion 41 projecting forward from the rear wall (the small diameter portion 12b of the outer cylinder 12) of the cylinder cylinder portion 40 is provided in the opening. It is mated. The front end wall of the piston guide 62 is provided with a guide hole 62a that passes through the front end wall. An annular recess 62 b is formed at the rear end of the outer peripheral surface of the piston guide 62.

  The outer cylinder part 60 is fitted inside the cylinder cylinder part 40. The inner peripheral surface of the cylinder cylinder portion 40 and the outer peripheral surface of the outer cylinder portion 60 are in close contact with each other at both ends in the front-rear direction. On the other hand, an annular gap S2 is secured in an intermediate portion located between both end portions in the front-rear direction, between the inner peripheral surface of the cylinder cylinder portion 40 and the outer peripheral surface of the outer cylinder portion 60. .

  The outer cylinder part 60 is formed with a first air vent 63 that allows the inside of the outer cylinder part 60 to communicate with the gap S2. A second passage for communicating the clearance S2 with the clearance S1 defined between the annular connection portion 12c of the outer cylinder 12 and the flange portion 13c of the inner cylinder 13 is connected to the annular connection portion 12c of the outer cylinder 12. A pore 64 is formed. Further, the flange portion 13 c of the inner cylinder 13 is formed with a third vent hole 65 that allows the gap S <b> 1 to communicate with the large diameter portion 13 a of the inner cylinder 13 and the inside of the mounting cap 14.

  A through hole 66 penetrating in the front-rear direction is formed in the rear wall portion 61 of the cylinder 53 at a portion located above the piston guide 62. In the illustrated example, a projecting cylinder portion 67 projecting rearward is formed at the opening peripheral edge portion of the through hole 66 in the rear wall portion 61, and the projecting cylinder portion 67 is a small diameter portion 12 b of the outer cylinder 12. It fits in the through-hole formed. A gap S <b> 3 is formed between the rear end portion of the protruding cylinder portion 67 and the outer peripheral surface of the reduced diameter portion 13 g of the inner cylinder 13. The through-hole 66 communicates with the inside of the injection cylinder portion 11 through the gap S3. The suction valve 36 switches communication between the container body A and the cylinder 53 and blocking of the communication.

The piston 52 is slidably fitted back and forth in the cylinder 53, and moves rearward as the trigger portion 51 swings backward to move the liquid in the cylinder 53 into the gap S3 and the injection cylinder portion 11. Supply. The piston 52 includes a columnar connecting portion 70 connected to the trigger portion 51, and a piston cylinder 71 positioned rearward of the connecting portion 70 and having a larger diameter than the connecting portion 70, and as a whole rearward. It is formed in a cylindrical shape that is open at the top.
Note that the cylinder 53 and the piston 52 are arranged on a common axis (not shown) extending along the front-rear direction.

  The piston cylinder 71 has a piston main body 72 that opens rearward and into which the piston guide 62 is inserted. The piston cylinder 71 projects outward from the rear end of the piston main body 72 in the radial direction. A sliding cylinder portion 73 that is in close sliding contact with the inner peripheral surface of the portion 60.

  The piston main body 72 is closely fitted to the piston guide 62. In the illustrated example, the rear end portion of the piston main body 72 is fitted to the piston guide 62 so as to be slidable in the front-rear direction. As a result, in the cylinder 53, the liquid that has flowed in the vertical supply cylinder portion 10 is introduced into the storage chamber 53 a located on the rear side of the sliding cylinder portion 73.

  By the way, when operating the trigger part 51 for the first time, it is necessary to discharge | emit the air in the storage chamber 53a. However, in the pressure accumulation mode, when the pressure accumulation valve 23 is moved backward to discharge air, the pressure accumulation valve When the pressure of the backward air acting on the pressure 23 falls below a predetermined pressure, the pressure accumulation valve 23 moves forward by the forward biasing force of a coil spring 32 described later, thereby closing the ejection hole 4 and stopping the discharge of air. Therefore, air tends to remain in the storage chamber 53a. Therefore, in the present embodiment, the inside of the storage chamber 53a and the inside of the container body A are communicated as described below so that the air remaining in the storage chamber 53a can be discharged into the container body A.

  In a state where the trigger portion 51 is located at the rearmost swing position and the piston 52 is moved to the rearward movement position, the rear end portion of the piston main body portion 72 is at the same position in the front-rear direction as the concave portion 62b of the piston guide 62. To position. At this time, the inside of the storage chamber 53a and the inside of the piston main body 72 communicate with each other through the space between the inner peripheral surface of the piston 52 and the recessed portion 62b. The inside of the piston main body 72 communicates with the inside of the fitting cylinder portion 41 through the guide hole 62 a and the piston guide 62. The inside of the fitting cylinder part 41 communicates with the inside of the container body A through a recovery passage 41 a provided in the ejector body 2. The collection passage 41 a is provided in the vertical supply cylinder portion 10. The collection passage 41 a is provided between the inner peripheral surface of the small diameter portion 12 b of the outer cylinder 12 and the outer peripheral surface of the small diameter portion 13 b of the inner cylinder 13. The collection passage 41a communicates with the inside of the container body A through the third vent hole 65 and the large diameter portion 13a of the inner cylinder 13. Thereby, the inside of the storage chamber 53a is a container body between the inner peripheral surface of the piston 52 and the recess 62b, in the piston main body 72, in the guide hole 62a, in the piston guide 62, in the fitting cylinder 41, and in the collection passage 41a. Communicate in A. As described above, when the trigger unit 51 is first operated, the air in the storage chamber 53a can be efficiently discharged into the container body A.

  Further, when the contents are filled in the storage chamber 53a, a residual pressure is generated in the storage chamber 53a when the trigger portion 51 is swung to the rearmost swing position, and the residual pressure is ejected by the residual pressure. There may be a case where “liquid dripping” occurs in which the contents are unexpectedly discharged from the hole 4. Particularly in the non-accumulation mode, the storage chamber 53a and the ejection hole 4 communicate with each other without being blocked by the pressure accumulation valve 23, so that dripping is likely to occur due to the residual pressure in the storage chamber 53a. According to the present embodiment, even if residual pressure is generated in the storage chamber 53a, this residual pressure is generated between the inner peripheral surface of the piston 52 and the recess 62b, in the piston main body 72, in the guide hole 62a, and in the piston guide 62. In addition, since it can be recovered in the container body A through the fitting cylinder portion 41 and the recovery passage 41a, it is possible to suppress dripping from the ejection holes 4 due to residual pressure, and to improve liquid drainage. This dripping prevention effect exhibits a significant advantage in the non-accumulation mode in which dripping tends to occur as described above.

  The sliding cylinder part 73 is formed in a tapered shape that gradually increases in diameter from the center part in the front-rear direction toward the front and rear, and lip parts 73 a located at both ends in the front-rear direction are formed on the inner peripheral surface of the outer cylinder part 60. Make sliding contact.

  The connecting portion 70 of the piston 52 is connected to the trigger portion 51 via a connecting shaft 86 described later. As a result, the piston 52 is urged forward by the urging force of the elastic plate portion 54 together with the trigger portion 51, and is moved rearward and pushed into the cylinder 53 as the trigger portion 51 swings backward. It is.

  Further, when the trigger portion 51 is in the foremost swing position (the most advanced position), the sliding cylinder portion 73 of the piston 52 closes the first vent hole 63. When the piston 52 moves backward by a predetermined amount due to the backward swing of the trigger part 51, the sliding cylinder part 73 opens the first ventilation hole 63. Thereby, 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 has a main plate member 80 having a front surface that is concavely curved toward the rear in a side view as viewed from the left and right directions, and a pair of side plate members 81 that stand rearward from the left and right side edge portions of the main plate member 80. And.

  A pair of connecting plates 82 are formed at the upper end portions of the pair of side plate members 81 so as to extend upward to the side of the injection tube portion 11 and sandwich the injection tube portion 11 from the left-right direction. The pair of connecting plates 82 are provided with a rotating shaft portion 83 projecting outward in the left-right direction. These rotary shaft portions 83 are rotatably supported by bearing portions provided on an upper plate member 84 that covers the upper side of the injection cylinder portion 11. Thereby, the trigger part 51 can be swung in the front-rear direction around the rotation shaft part 83.

The trigger 51 is formed with an opening 51a penetrating the main plate member 80 in the front-rear direction, and a connecting cylinder 85 is formed so as to extend rearward from the peripheral edge of the opening 51a.
A pair of connecting shafts 86 projecting in the left-right direction toward the inner side of the connecting cylinder 85 are formed on a portion of the inner peripheral surface of the connecting cylinder 85 positioned on the rear side. These connecting shafts 86 are inserted into connecting holes formed in the connecting portion 70 of the piston 52. Thereby, the trigger part 51 and the piston 52 are mutually connected.

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

The horizontal plate-like upper plate member 84 is attached to the upper surface of the injection cylinder portion 11.
The elastic plate portions 54 are integrally formed on both the left and right sides of the upper plate member 84 so as to be formed in an arc shape that is convex forward in a side view as viewed from the left and right directions and that extends to below the injection cylinder portion 11. Yes. The elastic plate portion 54 is formed in a circular arc shape that is concentric with each other when viewed from the side in the left-right direction, and includes a pair of leaf springs arranged in the front and rear direction.

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 arcuate folded portion 54c. A locking piece 54d protrudes downward from the folded portion 54c, and the locking piece 54d is inserted into the pocket portion 81a formed in the side plate member 81 of the trigger portion 51 from above and engaged therewith. ing.
Thereby, the elastic board part 54 is urging | biasing the trigger part 51 toward the front via the locking piece 54d and the pocket part 81a.

As shown in FIG. 2, the upper end portion of the main plate member 80 of the trigger portion 51 is in contact with the contact portion 19 g of the connecting member 19 described later by the urging of the elastic plate portion 54 from behind. Thereby, the trigger part 51 is positioned in the foremost swing position.
When the trigger portion 51 is pulled backward from the foremost swing position, the elastic plate portion 54 is elastically deformed so as to move the folded portion 54c backward via the locking piece 54d. At this time, in the elastic plate portion 54, the sub leaf spring 54b is elastically deformed larger than the main leaf spring 54a.

  Even if the trigger piece 51 is pulled rearward, the locking piece 54d is pulled upward from the pocket portion 81a until the trigger portion 51 reaches the rearmost swing position (the rearmost movement position). The engaged state with the pocket portion 81a is maintained.

  The ejector body 2 further includes a connecting member 19 that is attached to the injection cylinder portion 11 from the front side. As shown in FIG. 2, the connecting member 19 includes a substrate 19 a disposed to face the front end opening of the injection cylinder portion 11, and a first portion that extends rearward from the substrate 19 a and is externally fitted to the injection cylinder portion 11. A fitting cylinder 19b, a second fitting cylinder 19c extending forward from the substrate 19a, a cylinder cylinder 19d projecting forward on the inside of the second fitting cylinder 19c on the front surface of the substrate 19a, 2 a guide projection 19e that is located inside the fitting cylinder 19c and extends forward from the substrate 19a, and a plate-shaped rotation restricting portion 19f that protrudes radially outward from the outer peripheral surface of the guide projection 19e; And an abutting portion 19g projecting rearward from the lower end of the substrate 19a.

  Among these, the second fitting cylinder 19c, the cylinder cylinder 19d, and the guide protrusion 19e provided on the front surface of the substrate 19a are arranged coaxially with the rotation axis O2. The rotation axis O2 is located below the central axis of the injection cylinder part 11. An injection hole 25 is formed in the substrate 19a at a position facing the front end opening of the injection cylinder portion 11 fitted in the first fitting cylinder 19b, and the inside of the injection cylinder portion 11 is formed through the injection hole 25. And the cylinder cylinder 19d communicate with each other. The guide protrusion 19e is formed so as to fit inside the second fitting cylinder 19c without protruding forward from the second fitting cylinder 19c. A plurality of rotation restricting portions 19f are formed on the outer peripheral surface of the guide protrusion 19e at intervals in the circumferential direction, and each rotation restricting portion 19f extends from the rear end portion of the guide protrusion 19e to the center portion in the front-rear direction. ing. The contact portion 19g contacts the upper end portion of the main plate member 80 of the trigger portion 51 from the front of the trigger portion 51, thereby positioning the trigger portion 51 at the foremost swing position.

(Nozzle part)
The nozzle unit 3 includes the nozzle body 22 and the pressure accumulating valve 23 described above, and is disposed in front of the ejector body 2. The nozzle main body 22 is connected to the injection cylinder portion 11 via a connecting member 19 that is externally fitted to the front end portion of the injection cylinder portion 11. The nozzle body 22 is disposed in front of the injection cylinder portion 11, and the pressure accumulating valve 23 is disposed between the nozzle body 22 and the injection cylinder portion 11.

  The accumulator valve 23 has a cylindrical valve body 23a whose front end is closed and its rear end is opened, an annular flange portion 23b extending radially outward from the outer peripheral surface of the valve body 23a, and a flange portion 23b. A seal cylinder 23c projecting forward from the outer periphery of the valve body, and a plate-shaped regulated portion 23h projecting radially inward from the inner peripheral surface of the valve body 23a. . The valve body 23a, the flange portion 23b, and the seal cylinder portion 23c are disposed coaxially with the rotation axis O2.

  A diameter-expanded portion that gradually increases in diameter toward the rear is formed at the rear end of the valve body 23a. The enlarged diameter portion is in slidable contact with the inner peripheral surface of the connecting member 19 in the cylinder cylinder 19d. As a result, the contents are prevented from entering between the cylinder cylinder 19d and the valve body 23a. The flange part 23b is arrange | positioned in the center part in the front-back direction of the valve main body 23a. The front surface of the flange portion 23b is opposed to a rear end opening edge in an engagement cylinder portion 43 (described later) of the nozzle body 22 in the front-rear direction. The diameter of the sealing cylinder portion 23c gradually increases toward the front, and the front end portion is in sliding contact with the inner peripheral surface of the second fitting cylinder 19c of the connecting member 19 in close contact. The valve body 23a is formed with a plurality of through holes 23d penetrating the valve body 23a in the radial direction. Each of the plurality of through holes 23d is formed in a portion of the valve main body 23a located on the front side of the flange portion 23b.

  A plurality of regulated portions 23h are formed on the inner peripheral surface of the valve body 23a with a circumferential interval, and each regulated portion 23h extends in the front-rear direction from the front end 23e of the valve body 23a to the enlarged diameter portion. ing. In the front-rear direction, the rear end portion of each restricted portion 23 h is located at a position equivalent to the position of the central portion of each rotation restricting portion 19 f of the connecting member 19. In the radial direction, the inner end of each regulated portion 23 h is positioned inside the outer end of each rotation regulating portion 19 f of the connecting member 19. When the pressure accumulating valve 23 is rotated about the rotation axis O2, the rotation restricting portion 19f and the restricted portion 23h come into contact with each other in the circumferential direction. Thereby, the rotation of the pressure accumulating valve 23 around the rotation axis O <b> 2 with respect to the connecting member 19 and the injection cylinder portion 11 is restricted.

  The nozzle main body 22 is an annular valve that is freely closed when a connecting cylinder portion 21 that is rotatably fitted to the second fitting cylinder 19c of the connecting member 19 and a front end portion 23e of the pressure accumulating valve 23 are seated. A seat portion 24; a nozzle communication groove 27 that is disposed on the front side of the valve seat portion 24 and communicates with the inside of the ejection hole 4 and the valve seat portion 24; and an outer cylinder portion 29 that surrounds the connection cylinder portion 21; A fitting cylinder part 30 disposed on the radially inner side of the cylinder part 21, a cap mounting cylinder part 31 that opens forward, and an engagement cylinder part 43 that extends in the front-rear direction and opens backward. It is equipped with. The valve seat portion 24 is disposed on the radially inner side of the engagement tube portion 43. The inner peripheral surface of the valve seat portion 24 is gradually reduced in diameter toward the front. A nozzle cap 26 in which the ejection hole 4 is formed at the front end and the rear end is opened is fitted in the cap mounting cylinder portion 31. In this embodiment, the nozzle cap 26 and the nozzle body 22 are formed separately, but they may be formed integrally.

  Here, the pressure accumulating valve 23 and the guide projection 19e are arranged coaxially with the rotation axis O2, and the pressure accumulating valve 23 is urged forward by a coil spring 32 in which the guide projection 19e is inserted. The front end portion 23 e is seated on the valve seat portion 24.

The nozzle body 22 in this embodiment is formed with an engaging portion 44 that protrudes rearward from the edge of the rear end opening of the engaging cylinder portion 43, and the pressure accumulating valve 23 is formed from the front surface of the flange portion 23 b. An engaged portion 23f that protrudes forward is formed.
As shown in FIGS. 3 and 5, a plurality of engaging portions 44 and engaged portions 23f are formed at equal intervals in the circumferential direction. The protruding amount of each engaging portion 44 from the rear end opening edge of the engaging cylinder portion 43 and the protruding amount of each engaged portion 23f from the front surface of the flange portion 23b are equal to each other.
Inclined portions 44 a are formed at both peripheral ends of the plurality of engaging portions 44. Each inclined portion 44a is opposed to the engaged portion 23f in the circumferential direction, and is gradually separated from the engaged portion 23f adjacent in the circumferential direction toward the tip of the engaging portion 44 along the front-rear direction. It is inclined to. In addition, each inclination part 44a may contact | abut in the circumferential direction with respect to the to-be-engaged part 23f, or may be separated.
Inclined portions 23g are formed at both peripheral ends of the plurality of engaged portions 23f, respectively. Each inclined portion 23g faces the engaging portion 44 in the circumferential direction, and gradually moves away from the adjacent engaging portion 44 in the circumferential direction toward the tip of the engaged portion 23f along the front-rear direction. It is inclined. In addition, each inclination part 23g may contact | abut in the circumferential direction with respect to the engaging part 44, or may be separated.

(Operation of trigger type liquid ejector)
Next, the case where the trigger type liquid ejector 1 comprised as mentioned above is used is demonstrated.
It is assumed that the liquid is filled in each part of the trigger type liquid ejector 1 by the operation of the trigger part 51 a plurality of times, and the liquid can be sucked up from the vertical supply cylinder part 10.

  When the trigger part 51 is pulled backward against the urging force of the elastic plate part 54, the piston 52 moves backward with the rearward movement of the trigger part 51, so that the liquid in the cylinder 53 (in the storage chamber 53a) penetrates. It can be introduced into the hole 66, the gap S3, and the injection cylinder part 11. At this time, the suction valve 36 is closed, the communication between the vertical supply cylinder part 10 and the injection cylinder part 11 is blocked, and the inside of the injection cylinder part 11 is pressurized. When the nozzle portion 3 is in the pressure accumulation mode shown in FIGS. 2 and 3, the insides of the valve main body 23 a and the seal cylinder portion 23 c in the pressure accumulation valve 23 are also pressurized through the injection hole 25. At this time, since the inner diameter of the seal cylinder portion 23c is larger than the inner diameter of the valve body 23a, the pressure accumulation valve 23 has a pressure directed rearward due to the difference in pressure receiving area between the seal cylinder portion 23c and the valve body 23a. Works. When this pressure exceeds a predetermined pressure, the pressure accumulating valve 23 is retracted against the forward biasing force of the coil spring 32, and the front end portion 23e of the pressure accumulating valve 23 is separated from the valve seat portion 24. And the injection hole 4 are the injection hole 25, the valve body 23a, the seal cylinder 23c, the gap between the front end 23e and the valve seat 24, the inside of the valve seat 24, and the nozzle communication groove. The liquid is ejected from the ejection hole 4.

When the operation of pulling the trigger part 51 is stopped, the supply of the liquid from the cylinder 53 (in the storage chamber 53a) through the vertical supply cylinder part 10 to the injection cylinder part 11 is stopped. At this time, the pressure accumulating valve 23 moves forward by the forward biasing force of the coil spring 32, and the front end 23e of the pressure accumulating valve 23 is seated on the valve seat 24 to close it, and the inside of the injection cylinder 11 and the ejection hole 4 Block communication. And since the trigger part 51 is urged | biased forward by the elastic restoring force of the elastic board part 54, and it returns to the original position, the piston 52 moves forward in connection with this. Therefore, a negative pressure is generated in the cylinder 53 (inside the storage chamber 53a), and the liquid in the container body A can be sucked into the vertical supply cylinder portion 10 through the pipe 15 by this negative pressure.
Then, the newly sucked liquid pushes up the suction valve 36 to open it, and is introduced into the cylinder 53 (inside the storage chamber 53a). Thereby, it can prepare for the next injection.

Next, the operation when the nozzle body 22 is rotated to switch from the pressure accumulation mode to the non-pressure accumulation mode will be described.
When the nozzle body 22 is rotated around the rotation axis O2 from the pressure accumulation mode state shown in FIGS. 2 and 3, the rotation of the pressure accumulation valve 23 around the rotation axis O2 is restricted by the rotation restricting portion 19f of the connecting member 19. Therefore, the nozzle body 22 and the pressure accumulating valve 23 rotate relatively. Thereby, the inclined part 44a of the nozzle body 22 and the inclined part 23g of the pressure accumulating valve 23 come into contact with each other. When the nozzle body 22 is further rotated from this state, the engaging portion 44 of the nozzle body 22 and the engaged portion 23f of the pressure accumulating valve 23 are separated in the front-rear direction while sliding on the inclined portions 44a and 23g. Thus, the state shown in FIGS. 4 and 5 is obtained. In this state, the engaging portion 44 and the engaged portion 23f are in contact with each other in the front-rear direction, the front end portion 23e of the pressure accumulating valve 23 is separated from the valve seat portion 24, and the pressure accumulating valve 23 and the valve seat portion 24 are separated from each other. A gap S4 is generated between them. Since the inside of the injection cylinder portion 11 and the ejection hole 4 communicate with each other through the gap S4, the trigger type liquid ejector 1 is in a non-accumulation mode in which the accumulator valve 23 does not operate. In the non-accumulation mode, when the inside of the cylinder 53 is pressurized as the trigger portion 51 swings backward, the liquid in the container body A is injected into the injection cylinder portion 11, the injection hole 25, and the valve body by the pressure. It is ejected from the ejection hole 4 through the inside of 23a, the inside of the seal cylinder portion 23c, the gap S4, the inside of the valve seat portion 24, and the nozzle communication groove 27.

  As shown in FIG. 4, even when the pressure accumulating valve 23 is retracted to enter the non-accumulating mode, there is a back-and-forth direction between the rear end portion of the pressure accumulating valve 23 and the front surface of the connecting member 19 on the substrate 19a. The gap is secured. Thereby, it can prevent that the rear-end part of the pressure accumulation valve 23 contacts the board | substrate 19a, and deform | transforms. When the rear end portion of the pressure accumulating valve 23 (the enlarged diameter portion of the valve main body 23a) is deformed, a close sliding contact state between the cylinder cylinder 19d of the connecting member 19 and the valve main body 23a is not ensured, and the contents between the two Things may get in. In this embodiment, the sliding contact state between the cylinder cylinder 19d and the valve body 23a is stabilized by preventing the pressure accumulation valve 23 from being deformed as described above.

  When the trigger type liquid ejector 1 is further switched from the non-accumulation mode to the accumulation mode, the nozzle body 22 is rotated again around the rotation axis O2, and the engaging portion 44 and the engaged portion 23f are moved. What is necessary is just to make it the state which does not mutually oppose in the front-back direction. In this case, the pressure accumulating valve 23 moves forward by the forward biasing force of the coil spring 32, and the front end e of the pressure accumulating valve 23 is seated on the valve seat portion 24 to close it.

As described above, according to the trigger type liquid ejector 1 according to the present embodiment, since the pressure accumulation valve 23 that can move back and forth in the forward biased state is provided, in the pressure accumulation mode in which the pressure accumulation valve 23 is operated. Can stabilize the pressure of the liquid when it is ejected from the ejection hole 4 and can eject the liquid in an intended manner.
On the other hand, since the nozzle body 22 is provided so as to be rotatable around the rotation axis O2, and the pressure accumulation valve 23 is restricted from rotating around the rotation axis O2, the pressure accumulation valve 23 is rotated when the nozzle body 22 is rotated. And the nozzle body 22 rotate relatively around the rotation axis O2. With this relative rotation, the engaging portion 44 formed on the nozzle body 22 and the engaged portion 23f formed on the pressure accumulating valve 23 engage with each other to retract the pressure accumulating valve 23. Thereby, the inside of the valve seat part 24 where the front end part 23e of the pressure accumulating valve 23 is seated communicates with the ejection hole 4, and the non-accumulation mode in which the pressure accumulating valve 23 does not operate can be set.
Thus, according to the present embodiment, it is possible to provide the trigger type liquid ejector 1 capable of switching between the pressure accumulation mode and the non-pressure accumulation mode by an easy operation of rotating the nozzle body 22.

  Further, the engaging portion 44 that protrudes rearward from the rear end opening edge of the engaging cylinder portion 43 of the nozzle body 22 and the engaged portion 23f that protrudes forward from the front surface of the flange portion 23b of the pressure accumulating valve 23. , And the pressure accumulating valve 23 is moved backward with the relative rotation of the pressure accumulating valve 23 and the nozzle body 22, so that the trigger type liquid ejector 1 that can be switched between the pressure accumulating mode and the non-accumulating mode. Can be configured easily.

  When the nozzle body 22 is rotated, the engaging portion 44 and the engaged portion 23f slide on each other on the inclined portions 44a and 23g formed on the engaging portion 44 and the engaged portion 23f. Since the pressure accumulating valve 23 moves backward, the pressure accumulating mode and the non-accumulating mode can be switched reliably with the rotation of the nozzle body 22.

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

  For example, the inclined portions 44a and 23g of the engaging portion 44 and the engaged portion 23f may be formed only on either the engaging portion 44 or the engaged portion 23f. Further, these inclined portions 44a and 23g may be formed only at one peripheral end portion of the peripheral end portions of the engaging portion 44 and the engaged portion 23f. Alternatively, without forming such inclined portions 44a and 23g, for example, by rotating the nozzle body 22 while pulling forward with respect to the pressure accumulating valve 23, the engaging portion 44 and the engaged portion 23f are moved in the front-rear direction. You may switch between the mutually opposing position (non-accumulation mode) and the position not mutually opposing in the front-back direction (accumulation mode).

Moreover, in the said embodiment, although the connection member 19 and the injection cylinder part 11 were formed in the different body, it is not restricted to this, The connection member 19 and the injection cylinder part 11 may be formed integrally.
In the above embodiment, the trigger mechanism 50 including the cylinder 53 and the piston 52 is used. However, the present invention is not limited to this. For example, the injection cylinder from the vertical supply cylinder portion 10 is provided by a trigger mechanism including a pump that contracts and deforms in a bellows shape. You may employ | adopt the structure which distribute | circulates the liquid in the container body A toward the ejection hole 4 side through the part 11. FIG.
Moreover, although the trigger type liquid ejector 1 which injects a liquid toward the front from the ejection hole 4 was demonstrated in the said embodiment, this invention is not restricted to this, For example, toward directions other than the front, such as upward and left You may employ | adopt the trigger type liquid ejector which injects a liquid.

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

DESCRIPTION OF SYMBOLS 1 ... Trigger type liquid ejector, 2 ... Ejector main body, 3 ... Nozzle part, 4 ... Ejection hole, 10 ... Vertical supply cylinder part, 11 ... Injection | emission cylinder part, 22 ... Nozzle main body, 23 ... Accumulation valve, 23b ... Flange Part 23e ... front end part 23f ... engaged part 23g ... inclined part 24 ... valve seat part 43 ... engaging cylinder part 44 ... engaging part 44a ... inclined part 50 ... trigger mechanism 51 ... Trigger part, A ... container body, O2 ... rotating shaft

Claims (3)

An ejector body mounted on a container body containing a liquid;
A nozzle portion disposed on the front side of the ejector main body and formed with an ejection hole for ejecting liquid;
The ejector body is
A vertical supply cylinder that extends in the vertical direction and sucks up the liquid in the container body;
An injection cylinder part disposed in front of the vertical supply cylinder part and guiding the liquid in the vertical supply cylinder part to the ejection holes;
There is a trigger part disposed in front of the vertical supply cylinder part so as to be movable rearward in a forward-biased state, and liquid is moved from the vertical supply cylinder part into the injection cylinder part by the rearward movement of the trigger part. A trigger mechanism that circulates toward the ejection hole side through,
The nozzle portion includes a nozzle body that is rotatably provided around a rotation shaft that extends in the front-rear direction in front of the injection cylinder portion, and the nozzle portion between the nozzle body and the injection cylinder portion. And a pressure accumulating valve provided to be able to move back and forth in a state in which rotation is restricted and in a state of being biased forward, and the nozzle body communicates with the ejection hole and has a front end of the pressure accumulating valve Comprising a valve seat part that can be freely opened when the part is seated,
The nozzle body engages with an engaged portion formed on the pressure accumulating valve as the nozzle body rotates about the rotation axis, and retracts the pressure accumulating valve, The trigger type liquid ejector characterized by forming the engaging part which connects a jet hole. The nozzle body has an engagement tube portion that extends in the front-rear direction and opens toward the rear,
The accumulator valve has an annular flange portion facing the rear end opening edge of the engagement cylinder portion in the front-rear direction,
The engagement portion protrudes rearward from a rear end opening edge of the engagement cylinder portion, and the engaged portion protrudes forward from a front surface of the flange portion. The trigger type liquid ejector according to 1.   At least one of the engaging portion and the engaged portion is opposed to the other in the circumferential direction around the rotation shaft, and gradually from the other toward the tip along the rotation shaft direction. The trigger type liquid ejector according to claim 2, wherein an inclined portion that is inclined in a separating direction is formed.

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