JP3725291B2 - Trigger type liquid ejector - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a trigger type liquid ejector.
[0002]
[Prior art]
A trigger type liquid ejector that sucks up the liquid in the container into the cylinder by a trigger operation and ejects the liquid from the nozzle is conventionally known. For example, this type of trigger type liquid ejector is disclosed in Japanese Utility Model Publication No. 62-114672, Japanese Utility Model Many applications have already been filed as seen in 1-73360.
Here, this type of conventional trigger type liquid ejector will be described with reference to FIG. 6, taking one of its typical examples as an example.
[0003]
In the figure, 1 is a conventional trigger type liquid ejector, and a main column cylinder 3 is erected from the upper end of the mounting cylinder 2 fitted to the container neck and neck, and the inward flange-shaped top wall of the main cylinder 3 The upright cylinder 4 is erected from the upper part, and an injection cylinder (not shown) is projected from the upper part of the upright cylinder, and a cylinder 5 that shares the lower cylindrical wall with the inward flange-shaped top wall is projected from the middle part. The trigger 6 is suspended in a swingable manner, and the front end of the piston rod protruding forward from the piston 7 fitted into the cylinder 5 is pivotally attached to the upper rear surface of the trigger 6 so that the lower cylinder wall of the cylinder 5 and the inward flange shape A valve hole 8 is formed in a common wall with the top wall to form an outside air introduction valve 9 that is opened when the piston 7 is located at or near the rear limit, and is fitted into the main cylinder 3. The inner cylinder 11 is erected from the inward flange at the upper end of the support cylinder 10 and the inner cylinder 11 is erected. The valve hole 8 and the communication hole 12 communicating with the inward flange bored with is fitted into the 4, are suspended wicking pipe 13 from the inner cylinder 11.
The outside air introduction valve 9 is for introducing outside air into the container body through the valve hole 8 and the communication hole 12 when the cylinder 5 has a negative pressure.
[0004]
The lower part of the suction pipe 13 is bent obliquely forward. This is to cope with the case where the remaining amount of liquid is low, and the liquid stored in the front bottom portion of the container body is tilted forward. This is because the lower end of the suction pipe 13 is soaked in.
[0005]
[Problems to be solved by the invention]
This type of trigger type liquid ejector is normally used in an upright state, but in some cases, it may be used in an exceptionally inverted state as shown in FIG. However, in the above conventional example, the communication hole 12 is merely formed in the inward flange. Therefore, when the liquid ejector is turned upside down exceptionally, the liquid flows into the communication hole 12 and further from the valve hole 8 into the cylinder 5. May flow in and flow out from here.
Further, the lower part of the suction pipe 13 is inclined forward in order to cope with the case where the remaining amount of liquid is reduced. For this purpose, the lower part of the suction pipe 13 must be bent, and therefore the pipe A bending process was necessary.
[0006]
The trigger type liquid ejector according to claim 1, wherein a communicating hole communicating with the valve hole is formed in the upper wall of the hanging cylinder provided in the supporting cylinder, and the lower part of the connecting cylinder in front of the connecting cylinder at the lower end of the supporting cylinder. The suction hole is formed at a position shifted from the position, and when inverted, the liquid flowing from the suction hole is guided to the outside without flowing into the drooping cylinder and stored in the support cylinder outside the drooping cylinder. It is intended to prevent liquid leakage to the outside of the vessel.
[0007]
The trigger type liquid ejector according to claim 2 has a problem to be solved by the trigger type liquid ejector according to claim 1, and further forwards the fitting cylinder portion below the inwardly flanged bottom wall of the connecting cylinder. The bending process of the suction pipe can be omitted by allowing it to be immersed in a small amount of liquid stored in the front bottom part of the container body so that the lower end of the straight suction pipe reaches the front bottom part of the container body. It is intended to make it easier.
[0008]
[Means for Solving the Problems]
As a first means, the main column cylinder 21 is erected from the inside of the mounting cylinder 20 to be fitted to the container body neck and neck, and the upright cylinder 22 is erected from the inward flange-like top wall at the upper end of the main column cylinder 21. A cylinder member 23 that projects from the upper part of the upright cylinder 22 and a cylinder 23 that shares the lower cylindrical wall with the inward flange-shaped top wall from the middle part, respectively,
A trigger B that swings freely from the front of the injection cylinder,
A piston C fitted into the cylinder 23 and connecting the front end portion of the piston rod protruding forward to the rear surface of the upper portion of the trigger B;
A valve hole 25 is formed in a common wall of the lower cylindrical wall and the inward flange-like top wall of the cylinder 23, and the valve C is opened when the piston C is located in the rear limit or near the rear limit. An outside air introduction valve D;
An inner cylinder 27 whose upper surface is closed is erected from an inward flange at the upper end of the support cylinder 26 that is fitted into the main column cylinder 22 so as not to fall off, and the inner cylinder is fitted into the upright cylinder 22, and further, the lower surface of the inward flange An auxiliary member E in which a drooping cylinder 28 opened from the front surface is suspended and a communication hole 29 that can communicate with the valve hole 25 is formed on the upper wall of the dripping cylinder;
A fitting tube 31 is provided at the rear inner end of the inwardly flanged bottom wall of the connecting tube 30 open to the upper surface fixed to the lower end of the support tube 26, and the fitting tube portion 32a is located above the inwardly flanged bottom wall. The upper part is fitted into the inner cylinder 27, the suction pipes 33 and 41 are suspended from the fitting cylinder parts 32 b and 40 below the inward flange-shaped bottom wall, and the hanging cylinder at the front part of the connecting cylinder 30. The attachment member F is formed with an intake hole 35 communicating with the valve hole 25 through the communication hole 29 at a position shifted from below.
[0009]
As a second means, the fitting cylinder portion 32b that has the first means and hangs down the suction pipe 41 below the inward flange-like bottom wall is inclined forward.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
The trigger type liquid ejector according to the present invention includes a main body member A, a trigger B, a piston C, an outside air introduction valve D, an auxiliary member E, and an attachment member F as main components. Hereinafter, these will be sequentially described.
[0011]
In FIG. 1, A is a main body member, and a main column cylinder 21 is erected from the upper end of the mounting cylinder 20 fitted to the outer surface of the container body neck, and the upper surface of the upper end of the inward flange-shaped top wall at the upper end of the main column cylinder The closed upright cylinder 22 is erected, an injection cylinder with a nozzle (not shown) is projected from the upper end of the upright cylinder, and a cylinder 23 is projected forward from the middle, and the lower cylinder wall of the cylinder 23 is formed as an inward flange-shaped top wall. In addition, a valve cylinder with an open front and rear surface is provided to project forward from the center of the bottom wall of the cylinder 23.
[0012]
B is a trigger. The spring B is swingably suspended from the front part of the injection cylinder, and the upper end is engaged with the front part of the injection cylinder, and the lower end is biased forward by the spring material 24 engaged with the rear surface of the upper part of the trigger. ing.
[0013]
C is a cylindrical piston, and its outer peripheral surface is fitted into the cylinder 23 in an airtight and freely movable manner, and the front end of the piston rod protruding forward from the cylinder 23 is pivotally attached to the rear upper surface of the trigger. In this embodiment, the trigger B is urged in this way to pivotally attach the piston rod to the trigger B. However, the present invention is not limited to this, and instead of urging the trigger B, the piston C is urged forward. May simply be locked to the trigger B.
[0014]
Further, the valve cylinder communicating with the inside of the upright cylinder 22 via the suction hole in the cylinder bottom wall has a suction valve seat on the front surface of the valve cylinder, and a cylindrical protrusion formed on the outer periphery of the discharge hole in the cylinder bottom wall. A valve body 24 that serves both as a suction valve body and a discharge valve body is mounted.
[0015]
D is an outside air introduction valve, which has a valve hole 25 drilled in a common wall of the cylinder lower cylindrical wall and the inward flange-like top wall, and is open when the piston C is located at the rear limit or near the rear limit. The outside air is introduced into the container.
[0016]
E is an auxiliary member, and the upper cylinder is closed from the rear center of the inner end of the inward flange at the upper end of the support cylinder 26 fitted into the main column cylinder 21 so as not to fall off from the inward flange-like top wall thereof. The inner cylinder 27 is erected so that the inner cylinder is fitted into the erected cylinder 22, and a suction hole communicating with the valve cylinder is formed in the peripheral surface of the upper end of the inner cylinder. A drooping cylinder 28 having an open bottom surface is suspended from the front center, and a communication hole 29 communicating with the valve hole 25 is formed in the upper wall of the dripping cylinder. The lower end surface of the drooping cylinder 28 is located slightly above the lower end surface of the support cylinder 26.
[0017]
F is an attachment member, and a connecting cylinder 30 having an open top surface is fitted to the inner surface of the lower end of the support cylinder 26, and a fitting cylinder 31 is provided through the rear inner end of the inwardly flanged bottom wall of the connecting cylinder 30. . Then, the upper portion of the fitting cylinder cylinder portion (hereinafter referred to as a communication cylinder) 32a above the inward flange-shaped bottom wall is fitted into the inner cylinder 27, and the lower fitting is performed below the inward flange-shaped bottom wall. The suction pipe 33 is suspended from a cylindrical portion (hereinafter referred to as a suction pipe fitting cylinder) 32b.
[0018]
FIG. 2 shows the positional relationship between the communication cylinder 32a and the hanging cylinder 28. As can be seen from the above and the same figure, the former is located behind the latter, and both are adjacent to each other in the front-rear direction. Yes.
Further, a pair of intake holes 35, 35 communicating with the valve hole 25 via the communication hole 29 is formed at a position shifted from below the hanging cylinder 28 in the front part of the connection cylinder 30.
[0019]
That is, the intake holes 35, 35 are formed by a vertical hole drilled at the lower end of the peripheral wall and a horizontal hole drilled at the outer end of the inwardly flanged bottom wall. The vertical hole and the horizontal hole are formed from the lower end of the peripheral wall. It has an L-shaped cross section extending to the outer end of the bottom flange-shaped bottom wall. The pair of intake holes 35, 35 are substantially line-targeted with respect to a straight line L extending in the front-rear direction through the center of the connecting cylinder 30 as shown in FIG. 2.
[0020]
In the figure, the depth direction of the vertical hole and the depth direction of the horizontal hole coincide with each other, and these are substantially orthogonal to the straight line l, but are not limited thereto, and coincide with the radial direction of the connecting cylinder 30. It is also possible to make it.
In addition, the intake holes 35, 35 may be formed only on either the lower end of the peripheral wall of the connecting cylinder 30 or the outer end of the inwardly flanged bottom wall.
[0021]
FIG. 3 shows an embodiment of the trigger type liquid ejector according to claim 2. In this embodiment, the configuration of the suction pipe fitting cylinder is different from that of the first embodiment shown in FIG. ing.
That is, as shown also in FIG. 4, the suction pipe fitting cylinder 40 is different from the first embodiment in that it is inclined forward.
[0022]
Therefore, even if the suction pipe 33 that extends straight without being bent is suspended from the suction pipe fitting cylinder 40, the lower end of the suction pipe 41 reaches the front bottom of the container body. A small amount of liquid stored in the front bottom can be sucked up.
[0023]
Next, the operation of the first and second embodiments will be described.
First, an upright use state will be described. When the trigger B is pulled, the pressure in the cylinder 23 is increased, and the liquid is discharged from the discharge hole into the upright cylinder 22 and then ejected from the nozzle through the injection cylinder.
[0024]
When the trigger B is released after ejection, the trigger B swings forward due to the biasing force of the spring material 24, and the piston C starts to move forward from the rear limit position. Then, the inside of the cylinder 23 becomes negative pressure, and the liquid in the container is sucked into the cylinder 23. On the other hand, when the piston advances, the valve hole 25 is in an open state and communicates with the outside, and outside air is introduced from the valve hole 25 into the container body through the communication hole 29, the hanging cylinder 28, and the intake holes 35 and 35. This prevents the container body from being dented.
[0025]
On the other hand, when the liquid ejector is turned upside down, the liquid flows into the support cylinder 26 from the intake holes 35 and 35 as shown in FIG. Since it is formed at a shifted position, it does not flow into the drooping cylinder 28 and is stored outside the drooping cylinder 28. For this reason, the situation where the liquid flows into the cylinder 23 from the communication hole 29 through the valve hole 25 and leaks from the outside to the ejector is prevented.
[0026]
When the ejector is inverted, the lower end of the suction pipe is exposed to the container body air that has moved to the bottom of the container body. Since the liquid is sucked in by the trigger operation before inversion, it can be ejected by pulling the trigger. Next, when the trigger B is released, the pressure in the cylinder 23 becomes negative, so that the liquid in the suction pipe is sucked into the cylinder 23. When the trigger B is pulled from this state, the liquid that has entered the cylinder from the suction pipe is ejected.
Thus, in the inverted state, the amount of liquid that can be ejected is relatively small in the total amount in the cylinder 23 and the suction pipe, so that the usage time in the inverted state is short, and therefore the liquid stored in the support cylinder 26 overflows. Since the inverted use ends before flowing into the drooping cylinder 28, the liquid leaks even if the valve hole 25 is opened by pulling the trigger B and retracting the piston C before the overflow occurs after the inversion. There is nothing.
[0027]
On the other hand, when the pressure inside the cylinder 23 is reduced by the return movement of the trigger B to the front, outside air is introduced from the valve hole 25, but this outside air flows into the hanging cylinder 28 through the communication hole 29, Through the intake holes 35 and 35 and introduced into the container.
[0028]
【The invention's effect】
The trigger type liquid ejector according to claim 1, wherein a communicating hole communicating with the valve hole is formed in an upper wall of the hanging cylinder provided in the supporting cylinder, and an intake hole is formed in a connecting cylinder corner at the lower end of the supporting cylinder. Therefore, in the upright state of the liquid ejector, outside air is introduced into the container body through the valve hole, the communication hole, the hanging cylinder and the intake hole when the negative pressure in the cylinder is reduced, and in the inverted state, the intake hole is Since the liquid that flows into the support cylinder from the intake hole is stored in the support cylinder outside the drooping cylinder, because it is located at a position shifted from below the drooping cylinder 28 in the front of the connecting cylinder, Liquid does not leak from the communication hole through the valve hole to the outside of the cylinder.
[0029]
The trigger type liquid ejector according to claim 2, wherein the lower end of the straight suction pipe that extends without bending is formed by inclining the fitting cylinder part below the inward flange-like bottom wall of the connecting cylinder. Since the container body is tilted forward so that it reaches the bottom of the body and can be immersed in a small amount of liquid stored in the bottom of the container body, it is not necessary to bend the suction pipe, so the pipe bending process is omitted. Therefore, cost can be reduced.
[Brief description of the drawings]
FIG. 1 is a partially cutaway cross-sectional view showing a state when a trigger type liquid ejector according to the present invention is used upright.
2 is a cross-sectional view taken along line XX in FIG.
FIG. 3 is a partially cutaway sectional view showing a second embodiment, similarly;
FIG. 4 is a side view of the attachment member.
FIG. 5 is also an operation explanatory diagram of the second embodiment at the time of inverted use.
FIG. 6 is a partially cutaway cross-sectional view showing a state of the conventional example when used upside down.
[Explanation of symbols]
20 Mounting cylinder 21 Main column cylinder 22 Standing cylinder 23 Cylinder 25 Valve hole 26 Support hole 27 Inner cylinder 28 Drooping cylinder 29 Communication hole 30 Connecting cylinder 31 Fitting 32a Upper fitting cylinder part 32b Lower fitting cylinder part 33 Suction piston 34 Corner 35 Suction hole 40 Suction pipe fitting cylinder 41 Suction pipe A Body member B Trigger C Piston D Outside air introduction valve E Auxiliary member F Attachment member

Claims (2)

The main column cylinder 21 is erected from the inside of the mounting cylinder 20 to be fitted to the container body neck and neck, the upright cylinder 22 is erected from the inward flange-like top wall at the upper end of the main column cylinder 21, and the upper part of the erection cylinder 22 A main body member A projecting forward from a cylinder 23 sharing the injection cylinder from the middle and the lower cylindrical wall from the middle part with the inward flange-shaped top wall;
A trigger B that swings freely from the front of the injection cylinder,
A piston C fitted into the cylinder 23 and connecting the front end portion of the piston rod protruding forward to the rear surface of the upper portion of the trigger B;
A valve hole 25 is formed in a common wall of the lower cylindrical wall and the inward flange-like top wall of the cylinder 23, and the valve C is opened when the piston C is located in the rear limit or near the rear limit. An outside air introduction valve D;
An inner cylinder 27 whose upper surface is closed is erected from an inward flange at the upper end of the support cylinder 26 that is fitted into the main column cylinder 22 so as not to fall off, and the inner cylinder is fitted into the upright cylinder 22, and further, the lower surface of the inward flange An auxiliary member E in which a drooping cylinder 28 opened from the front surface is suspended and a communication hole 29 that can communicate with the valve hole 25 is formed on the upper wall of the dripping cylinder;
A fitting tube 31 is provided at the rear inner end of the inwardly flanged bottom wall of the connecting tube 30 open to the upper surface fixed to the lower end of the support tube 26, and the fitting tube portion 32a is located above the inwardly flanged bottom wall. The upper part is fitted into the inner cylinder 27, the suction pipes 33 and 41 are suspended from the fitting cylinder parts 32 b and 40 below the inward flange-shaped bottom wall, and the hanging cylinder at the front part of the connecting cylinder 30. 28. A trigger type liquid ejector having an attachment member F in which an intake hole 35 communicating with the valve hole 25 through the communication hole 29 is formed at a position shifted from below. The trigger type liquid ejector according to claim 1, wherein a fitting cylinder portion 32b below the inward flange-like bottom wall, which hangs down the suction pipe 41, is inclined forward.

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