JPH10236503A - Liquid ejection pump - Google Patents

Abstract

PROBLEM TO BE SOLVED: To form the whole liquid ejection pump of the synthetic resin in a method wherein an expandable cylinder in which a cylindrical part small in diameter, thin in wall thickness, and elastically deformable in a recessed manner is erected from an upper edge of a support cylindrical part through a thin-walled curved part, is supported in a vertically movable manner. SOLUTION: A nozzle 6 in erected when in use to make a base end opening communicate with a through hole 46, and then, a depressing head 7 is vertically moved several times to perform the initial operation, and the liquid in a container is introduced in an expandable cylinder 4 for preparation. When the head 7 is depressed, a curved part 33 and a deformed cylindrical part 34 of the expandable cylinder 4 are pressed into a support cylindrical part while elastically deformed, and the volume in the expandable cylinder 4 is reduced to pressurize the stored liquid, and the pressurized liquid passes through a stem 5 and opens a discharge valve B, and ejected from the nozzle 6. When the pressure on the head 7 is released, the stem 5 and the head 7 are elevated by the elastic restoration force of the curved part 33 and the deformed cylindrical part 34 of the expandable cylinder 4, and the pressure in the expandable cylinder 4 becomes negative, and the liquid in the container flows in by opening a suction valve A.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a liquid ejection pump.

[0002]

2. Description of the Related Art As a liquid ejection pump, there is known a so-called push-down head type pump in which a push-down head at an upper end is pushed down to eject a liquid from a nozzle hole of the head by the action of an internal pump mechanism. .
As an example of these, for example, a cylinder whose upper end is fixed by a mounting cap fitted to the mouth and neck of the container body and whose lower part is hung down into the container body, and an annular piston which is vertically movably fitted in the cylinder. A stem protruding from the outer periphery of the lower end is provided so as to be movable up and down, and a stem having an upper end protruding above the cylinder, and a depressing head with a nozzle fitted to the upper end of the stem are provided. A discharge valve is provided in the inner upper part, and a vertically moving member composed of a stem and a pushing head is constantly urged upward by a coil spring, and the vertically moving member is pushed down against the urging of the spring, so that the inside of the cylinder is lowered. When the liquid is pressurized and the discharge valve is opened, the liquid is ejected from the nozzle. There negative pressure to the discharge valve is closed, and the container body of the liquid by the suction valve opens and as configured introduced into the cylinder.

[0003]

Conventional pumps of this type often use metal for a part of the components thereof. For example, a ball-shaped valve element constituting a suction valve and a discharge valve, or a vertically moving member is used. A coil spring or the like to be urged upward is formed of metal. However, in recent years, waste treatment has required the separation of metals and plastics. Conventionally, this separation is extremely difficult due to the fact that the metal parts are fine and they are sealed inside. Met. In view of such circumstances, the present invention can be formed entirely of synthetic resin without using a metal coil spring, and exhibits excellent functions similar to conventional products in pump function. Yes, there is no liquid leakage,
An object of the present invention is to provide an excellent liquid ejection pump capable of favorably preventing dents due to negative pressure of a container to be mounted.

[0004]

According to a first aspect of the present invention, there is provided a liquid ejecting pump according to the present invention. A cylindrical support case 3 having a guide tube 12 penetrating the center of the top plate portion 11 and a plurality of window holes 10 formed in a peripheral wall suspended in the container body, A suction valve A provided at the center of the bottom of the support case, and a lower end fitted and fixed to the bottom of the support case around the suction valve to raise the support cylinder 32 upward, and a curved portion thinner than the upper edge of the upper end of the support cylinder. A telescopic cylinder 4 having a small-diameter thin-walled and deformable elastically deformable cylindrical section 34 interposed therebetween, and a lower end connected to an upper end of the telescopic cylinder to be supported so as to be movable up and down. The upper end protrudes above the top plate 11 of the support case 3 through the A stem 5 having a discharge valve B formed in a portion thereof, and a press-down head 7 with a nozzle 6 fitted and fixed to the upper end of the stem, and the lower end of the outer periphery of the stem is moved to the inner periphery of the guide cylinder 12 when the telescopic cylinder 4 is pulled up. The liquid ejection pump is characterized in that it can be slidably engaged with the lower end.

In the pump according to the second aspect of the present invention, the upward step 37 provided on the lower end of the outer surface of the stem 5 abuts on the downward step 38 provided on the inner surface of the guide cylinder 12 and the upward step. The outer surface of the locking ridge 39 provided on the outer periphery below the step portion 37 is slid in contact with the inner surface of the guide cylinder 12 below the downward step portion 38,
When the telescopic tube 4 is pulled up, the lower end of the stem outer periphery is guided
12. A liquid jet pump according to claim 1, wherein the liquid jet pump is slidably engaged with the lower end of the inner surface.

In the pump according to the third aspect of the present invention, the nozzle 6 is configured to be rotatable from a forwardly projecting state to a downwardly hanging state, and the nozzle hole and the stem 5 are communicated only in the forwardly projecting state. The liquid ejecting pump according to claim 1, wherein the tip is locked to the upper surface of the top plate portion 11 of the support case in a state in which the nozzle is suspended so that the head cannot be pushed down.

The pump according to a fourth aspect of the present invention is provided with a detent mechanism C between the stem 5 and the support case 3 that allows the stem to move up and down and disables rotation.
The press-down head 7 is fitted to the outer periphery of the upper end of the stem 5 in a liquid-tight and rotatable manner, and the communication hole 49 formed in the upper part of the stem 5 and the nozzle base end opening are connected by the rotation of the head 7 with respect to the stem 5. Thus, the liquid ejection pump according to claim 1 is configured to open and close the nozzle 6.

In the pump according to the fifth aspect of the present invention, a spacer 52 is detachably attached to a lower portion of the head with the lower end of the outer periphery of the stem 5 being slidably engaged with the lower end of the inner periphery of the guide cylinder 12. As a liquid ejection pump.

In the pump according to the present invention, the spacer is a spacer 52A provided with a nozzle cap 55.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. The liquid ejection pump 1 of the present invention
Support case 3 with mounting tube 2, telescopic tube 4, stem 5
And a press-down head 7 with a nozzle 6 as main members.

The support case 3 has a mounting cylinder 2 projecting in a double-cylindrical shape having a bottom center and a top plate center opening and a lower cylinder opening at an upper outer periphery. By being fitted to the outer periphery of 9, the lower end thereof is hung down in the container body and fixed. In addition, a plurality of window holes 10 are formed in the peripheral wall suspended in the container body 8 and the top plate 11
A guide tube 12 for penetrating the stem 5 is provided at the center, and a suction valve A is provided at the center of the bottom. Further, a pipe 13 which is communicated with the suction valve A and hangs down from the lower end of the container is connected.

The embodiment shown in FIG. 1 shows an example in which the mounting cylinder 2 is rotatably provided.
It comprises a locking member 15 and a mounting tubular member 16. The case body 14 has a cylindrical shape with an upper end opening in which a peripheral wall 18 is erected from the peripheral edge of the bottom wall 17, a flange 19 is protruded outward from an upper peripheral portion of the peripheral wall, and a peripheral wall immediately below the flange is formed thick. And also
A bulged portion 17a is formed by bulging a central portion of the bottom wall upward in a cylindrical shape, and a through hole serving as a valve hole of a suction valve is opened in the center of the top plate. In addition, a fitting tube for pipe fitting from the bottom wall back
20, the upper end of the pipe 13 is fitted on the inner surface of the fitting cylinder, and the lower end is hung down on the lower end of the container body.

The window hole 10 serves to reduce the weight of the support case 3 and to serve as an air intake hole for eliminating negative pressure inside the container. In this embodiment, the window hole 10 has a vertically long rectangular shape.
Are provided at equal intervals in the circumferential direction. However, the number and the shape of the window holes 10 are not particularly limited, but it is preferable that the lower end thereof reaches the bottom wall 17 of the support case 3 in consideration of the case where liquid enters.

The locking member 15 constitutes the top plate portion 11 of the support case 3 from the upper end edge of the fitting cylinder 21 which is fitted to the outer periphery of the upper end of the peripheral wall of the case main body 14 through the concave-convex engagement means so as not to come out. While extending the top plate portion 11a, the above-described guide tube 12 is provided at the center thereof, and a seal tube 22 which is vertically provided from the peripheral portion of the back surface of the top plate portion 11a is closely fitted to the upper end of the inner surface of the peripheral wall of the case body 14. ing.

The mounting cylinder member 16 has a mounting flange 23 extending inward from the upper end edge of the mounting cylinder 2 having a thread formed on the inner periphery thereof.
And the fitting member 21 of the locking member 15 are rotatably loosely fitted. Then, the lower end of the case main body 14 is inserted into the container body, and the lower end of the flange 19 which is brought into contact with the upper surface of the mouth and neck portion 9 is tightly fitted to the thick portion of the peripheral wall of the case main body at the upper end of the inner surface of the neck portion 9 of the container body. The mounting cylinder member 16 is pressed and locked by the flange 23.

The suction valve A is formed by mounting a valve member 24 made of a synthetic resin or an elastomer, which closes the through hole of the support case 3 so as to be openable and closable. The valve member 24 is
As shown in FIG. 2, a plurality of elastic plate portions 26 project in the circumferential direction inward from the upper end of the fitting peripheral wall 25, and a valve plate 27 having an outer peripheral edge integrally connected to an inner edge of each elastic plate portion 26 is provided. The peripheral wall is fitted on the outer surface of the bulging portion 17a of the case body 14, and the through hole is closed by a valve plate. In addition, suction valve A
The suction valve A is not limited to the above-described one, and for example, the suction valve A can be configured by adopting a valve member 24a as shown in FIGS.

The valve member 24a has a cylindrical base portion 28 with a flange protruding inward from the upper edge and outward from the lower edge, and stands upright from the upper edge of the base. A plurality of coil springs 29 are provided in the circumferential direction, and a valve plate 30 whose central portion is spherically recessed is provided at the upper end thereof. The support case 3 to which the valve member 24a is attached is
A fitting cylindrical portion 31 is erected from the periphery of the through hole of the bulging portion 17a,
The tubular base 28 is fitted and fixed by covering the bulging portion 17a, the coil spring 29 is fitted around the outer periphery of the fitting tubular portion 31, and the upper end opening of the fitting tubular portion 31 is closed by the valve plate 30. And attach it.

The telescopic cylinder 4 has a lower end liquid-tightly fitted and fixed to the bottom of the support case around the suction valve A to elevate the support cylinder 32 upward, and to form a thin curved portion 33 from the upper end edge of the support cylinder. A deformable cylindrical portion 34 having a small diameter and a thin wall and capable of being elastically depressed is formed upright. As shown in FIG. 3, this depression elastic deformation means that when pressed from above, the deformed cylindrical portion 34
Means that the lower edge is elastically deformed so as to be successively folded at approximately 180 ° and depressed. At this time, the thin curved portion 33 functions as a guide at the beginning of the elastic deformation.

In the present embodiment, a large-diameter lower connecting cylinder 35 is provided at the lower end of the support cylindrical portion 32, and the upper end of the deformed cylindrical portion 34 is slightly curved inward so that a small-diameter upper connecting cylinder 36 is provided at the upper edge thereof. Are extended, and the lower connecting cylinder 35 is sandwiched and fixed between the outer periphery of the peripheral wall of the valve member 24 and the lower end of the inner surface of the peripheral wall 18 of the case body so as to stand up. Above the telescopic cylinder 4, there is provided a stem 5 supported movably up and down and a push-down head 7.

The stem 5 communicates with the inside of the telescopic cylinder 4 and is a conduit for introducing the liquid in the telescopic cylinder 4 to the upper depressing head 7. The stem 5 has a cylindrical shape with upper and lower ends opened. The outer periphery of the upper end is liquid-tightly fitted and fixed, and the upper end is vertically movably protruded above the top plate 11 of the support case 3 via the guide tube 12.

The upward step 37 formed on the lower portion of the outer surface of the stem 5 abuts on the downward step 38 slidably contacting the lower portion of the inner surface of the guide tube 12 so that further pulling of the stem cannot be performed. A locking ridge 39 provided around the lower end of the outer periphery of the stem below the upward step 37 is connected to the guide cylinder below the downward step 38.
It is configured to be in sliding contact with the lower end of the inner surface 12 so as to maintain good liquid tightness in this portion. The locking ridge 39 forcibly rides on the lower end of the inner surface of the guide cylinder 12, and when the telescopic cylinder 4 is used.
In the case of upward biasing by, the locking ridge 39 is liquid-tightly locked to the lower surface of the guide cylinder 12. Therefore, the telescopic cylinder 4 is in a state of being pulled up upward in the locked state of FIG. 1, and is slightly contracted in the case of expansion and contraction during use. The state in which the telescopic cylinder 4 is pulled up is caused by the elastic deformation of the curved portion 33. Further, a discharge valve B is provided in the upper part of the stem 5. The discharge valve B is configured by mounting a synthetic resin ball-shaped valve body 41 on a valve seat 40 protruding from the upper part of the stem so as to close its valve port and move up and down.

The push-down head 7 ejects the liquid introduced from the stem 5 from the nozzle 6 at the front end, and pushes down to operate the internal pump mechanism. The fitted vertical cylinder 42 is vertically installed from the center of the back surface of the top wall 43, and a hanging wall 44 is vertically installed from the peripheral edge of the top wall to the vertical cylinder halfway position. It protrudes forward through the hanging wall. Further, a bar-shaped projection 45 for regulating the vertical movement of the ball-shaped valve element 41 is provided vertically from the center of the rear surface of the top wall 43.

In this embodiment, the nozzle 6 is configured to be rotatable from a forwardly protruding state to a downwardly hanging state, and is configured such that the nozzle hole and the inside of the stem 5 communicate only in the forwardly protruding state. In this state, the tip is locked to the upper surface of the top plate 11 of the support case 3 so that the head cannot be pushed down. In this embodiment, both sides of the base end of the nozzle 6 separately provided at the front part of the vertical cylinder 42 of the head 7 are pivotally connected, and the end face is formed in an arcuate surface. The wall surface of the opening at the front end of the hole 46 is formed as an arc surface on which the arc surface is slidable. When the nozzle 6 is in the forwardly protruding state, the nozzle hole and the through hole 46 are formed.
Are arranged so that when the nozzle 6 is rotated downward, the arc surface thereof closes the through hole 46. When the nozzle is dropped downward, the tip of the stem 5 contacts the upper surface of the top plate 11 at a position where the upward step 37 of the stem 5 and the downward step 38 of the guide cylinder 12 contact each other. .

When the pump 1 constructed as described above is not used for storage, transportation, etc., the nozzle 6 is turned down so that its tip is in contact with the top plate 11 upper surface. In addition, when used, the nozzle 6 is erected and its base opening is opened through a hole.
Then, the initial operation is performed by moving the press-down head up and down several times, and the liquid in the container body is introduced into the telescopic cylinder 4 to prepare the same. Next, when the push-down head is pushed down, the curved portion 33 and the deformed tube portion 34 of the telescopic tube 4 are pushed into the support tube portion 32 while being elastically deformed, thereby reducing the volume in the telescopic tube 4 and pressurizing the stored liquid. The pressurized liquid is ejected from the nozzle 6 through the stem 5, opening the discharge valve B. Next, when the pressing of the head is released, the stem 5 and the head 7 are raised by the elastic restoring force of the curved portion 33 and the deformed tube portion 34 of the telescopic tube 4, and the inside of the telescopic tube becomes negative pressure. Open to be introduced. At this time, outside air is introduced from the window hole 10 through the space between the guide tube 12 and the stem 5 into the container body which is reduced in pressure by the decrease of the liquid.

In the embodiment shown in FIG. 8, a rotation preventing mechanism C is provided between the outer periphery of the lower portion of the stem 5 and the inner surface of the guide cylinder 12. As this rotation preventing mechanism C, a concave groove 47 is vertically provided on the outer periphery of the stem 5, while a vertical ridge 48 is vertically provided on the inner surface of the guide tube 12 of the support case 3, and the vertical ridge is vertically inserted into the concave groove 47. It is movably fitted so that the stem moves up and down with respect to the support case 3 but does not rotate.

Further, the fitting position of the upper end of the stem 5 is
And a liquid-tight and rotatably fitted fitting, and a communication hole 49 formed in the upper portion thereof and a nozzle base end opening are communicated by rotating the head 7 with respect to the stem 5. The nozzle is configured to open and close.

Further, the locking plate portion 50 is bridged between the upper portion of the outer surface of the rod-shaped projection 45 and the upper portion of the inner surface of the vertical cylinder 42, and the locking plate portion 50 is inserted into the notch 51 provided at the upper end of the stem 5. To restrict the rotation of the head. Therefore, the locking plate 50 is notched.
In a state of contact with one side portion of the nozzle 51, the base end opening of the nozzle 6 is located at a position shifted from the communication hole 49, and is closed in a liquid-tight manner by the upper end of the stem 5, so that the inside of the stem and the inside of the nozzle are shut off. Further, when the locking plate portion 50 is rotated so as to contact the other side portion of the notch 51, the communication hole 49 and the nozzle base end opening communicate with each other so that the liquid can be ejected. ing.

In this embodiment, a spacer 52 is provided. The spacer is interposed below the press-down head 7 to prevent the head from being pressed down. The spacer is provided with a handle 54 from the rear outer surface of the ring-shaped base 53 having one end opened.
The base 53 is pushed down, and the lower portion of the vertical cylinder 42 of the head 7 and the outer surface of the upper portion of the stem 5 are fitted in a snap-fit manner, and the upper surface thereof is engaged with a downward step provided on the outer surface of the vertical cylinder 42. And the lower surface of the top case 11 of the support case 3
It is locked and attached to the upper surface.

In the embodiment shown in FIG. 10, another type of spacer 52A is provided, and the spacer 52A is provided with a nozzle cap 55. In this embodiment, a handle 54a having a T-shaped cross section protrudes from the front outer surface of a ring-shaped base 53a having a rear opening, and a front portion of a support plate 56 protruding forward from an upper front surface of the handle 54a. Nozzle cap on top
55, the base 53a is pushed down and fitted into the lower surface of the vertical cylinder 42 of the head 7 and the outer surface of the upper part of the stem 5 in a snap-fit manner. And the lower surface of the support case 3
The nozzle cap 55 is fitted on the tip of the nozzle 6 and attached. In each of the above embodiments, each member is mainly formed of a synthetic resin, and is formed by using an elastomer, a metal, or the like as needed.

[0030]

As described above, in the pump of the present invention, the mounting cylinder 2 projecting in a double cylindrical shape on the upper outer periphery is fitted and fixed on the outer periphery of the container body neck 9 and the center of the top plate 11 is fixed. A tubular support case 3 provided with a penetrating guide cylinder 12 and a plurality of window holes 10 formed in a peripheral wall hanging down in the container body, and a suction valve A provided at the center of the bottom of the support case;
The lower end of the support case is fixedly fitted to the bottom of the support case around the suction valve to raise the support cylinder 32 upward, and is small in diameter and thin and depressed elastically deformable from the upper edge of the support cylinder through a thin curved portion 33. Telescopic tube 4 with deformed tube portion 34 standing upright
A lower end is connected to the upper end of the telescopic cylinder so as to be supported vertically movably, the upper end protrudes above the top plate 11 of the support case 3 via the guide cylinder 12, and a discharge valve B is formed inside. And a push-down head 7 with a nozzle 6 fitted and fixed to the upper end of the stem so that the lower end of the outer periphery of the stem can be slidably engaged with the lower end of the inner periphery of the guide tube 12 when the telescopic tube 4 is pulled up. With this configuration, it is not necessary to use metal coil springs that are difficult to separate.Moreover, the telescopic cylinder can be stored in an upwardly raised state, so that the telescopic cylinder does not settle when used, and a good elastic expansion and contraction action can be performed. The squirting function can be exhibited well. Further, the weight of the support case can be reduced due to the presence of the window holes provided in the peripheral wall of the support case, and thus the entire pump can be reduced in weight.

Further, an upward step 37 provided on the lower end of the outer surface of the stem 5 is brought into contact with a downward step 38 provided on the inner surface of the guide cylinder 12 and is brought into contact with the outer periphery below the upward step 37. The outer peripheral surface of the locking protrusion 39 is slidably contacted with the inner surface of the guide tube 12 below the downward stepped portion 38, and the lower end of the outer periphery of the stem is slidably engaged with the lower end of the inner surface of the guide tube 12 when the telescopic tube 4 is pulled up. In the case of the product that does not have to be pulled up, an extra push-down head is not required, and the telescopic cylinder can be reliably pulled up to an appropriate length. You can do it.

The nozzle 6 is configured to be rotatable from a forwardly protruding state to a downwardly hanging state, and is configured such that the nozzle hole and the stem 5 communicate only in the forwardly protruding state. In the case where the head is not pressed down by being locked to the upper surface of the top plate portion 11 of the support case, the sliding contact between the stem and the guide cylinder is ensured, and there is no possibility that the head is pushed down by an external force. Liquid leakage can be prevented. In addition, a detent mechanism C is provided between the stem 5 and the support case 3 so that the stem can be moved up and down and cannot be rotated. The opening and closing of the nozzle 6 is performed by connecting the communication hole 49 formed in the upper part of the stem 5 and the nozzle base end opening by rotating the head 7 with respect to the stem 5 as possible. In this case, the nozzle can be opened and closed by an extremely simple operation of rotating the head, and leakage of the liquid from the nozzle hole can be prevented even if the container is accidentally turned down.

Further, in the case where the spacer 5 is detachably mounted on the lower part of the head in a state where the lower end of the outer periphery of the stem 5 is slidably engaged with the lower end of the inner periphery of the guide cylinder 12, the slide between the stem and the guide cylinder is provided. The contact is ensured, and there is no danger that the head is pushed down by an external force, so that careless injection of the liquid can be prevented.

Further, in the case where the spacer 52A provided with the nozzle cap 55 is interposed, in addition to the effect of the spacer, the effect of preventing the liquid from leaking from the nozzle even if the container is accidentally turned down. Can also be demonstrated.

[Brief description of the drawings]

FIG. 1 is a partially cutaway half sectional view showing an embodiment of the present invention.

FIG. 2 is an exploded cutaway perspective view of the embodiment.

FIG. 3 is an explanatory diagram for explaining the operation of the telescopic cylinder of the embodiment.

FIG. 4 is an enlarged sectional view of a main part of a stem sliding contact portion of the embodiment.

FIG. 5 is a plan view of the embodiment.

FIG. 6 is a half sectional view showing a main part of another suction valve according to the present invention.

FIG. 7 is an exploded cutaway perspective view of the embodiment.

FIG. 8 is a partially cutaway half sectional view showing still another embodiment of the present invention.

FIG. 9 is a perspective view showing a spacer in the embodiment.

FIG. 10 is a transverse sectional view of a spacer portion of the embodiment.

FIG. 11 is a partially cutaway side view showing still another embodiment of the present invention.

FIG. 12 is a perspective view showing a spacer in the embodiment.

FIG. 13 is a transverse sectional view of a spacer portion of the embodiment.

[Explanation of symbols]

2 mounting cylinder, 3 support case, 4 telescopic cylinder, 5 stem, 6 nozzle, 7 depressing head, 9 mouth and neck, 10
… Window holes, 11… top plate part, 12… guide cylinder, 32… support cylinder part, 33…
Bending part, 34 ... deformed cylindrical part, 37 ... upward step part, 38 ... downward step part, 39 ... locking ridge, 49 ... communication hole, 52, 52A ... spacer, 55 ... nozzle cap, A ... suction valve, B ... Discharge valve, C ... Detent mechanism

Claims (6)

[Claims] 1. A mounting tube 2 projecting in a double cylindrical shape on an upper outer periphery.
Is fitted and fixed to the outer periphery of the container body neck and neck 9, and a guide cylinder 12 penetrating the center of the top plate 11 is provided, and
A cylindrical support case 3 having a plurality of window holes 10 formed in a peripheral wall suspended in a container body, a suction valve A provided at the center of the bottom of the support case, and a lower end provided at a bottom of the support case around the suction valve. The support cylinder 32 is erected upward by fitting and fixing, and is expanded and contracted by erecting a deformable cylinder 34 having a small diameter, a thin wall, and a resiliently deformable depression through a thin curved portion 33 from an upper edge of the support cylinder. The lower end is connected to the cylinder 4 and the upper end of the telescopic cylinder so as to be vertically movable and supported, and the upper end protrudes above the top plate portion 11 of the support case 3 via the guide cylinder 12, and the discharge valve B is provided inside. It has a stem 5 formed and a push-down head 7 with a nozzle 6 fitted and fixed to the upper end of the stem, and the lower end of the outer periphery of the stem is slidably engaged with the lower end of the inner periphery of the guide cylinder 12 when the telescopic cylinder 4 is pulled up. Liquid ejection port characterized by being configured to be capable of Flop. 2. A downwardly stepped portion provided on the inner surface of the guide cylinder 12.
An upward step 37 provided around the lower end of the outer surface of the stem 5 is brought into contact with and engaged with the stem 38, and an outer surface of a locking ridge 39 provided on the outer periphery below the upward step 37 is brought into contact with the lower part of the downward step 38. 2. The liquid ejection pump according to claim 1, wherein the lower end of the outer periphery of the stem is slidably engaged with the lower end of the inner surface of the guide cylinder 12 when the telescopic cylinder 4 is pulled up by slidingly contacting the inner surface of the guide cylinder 12. 3. The nozzle 6 is configured to be rotatable from a forwardly projecting state to a downwardly hanging state, and is configured such that the nozzle hole and the stem 5 communicate only in the forwardly projecting state. The head is locked to the upper surface of the top plate portion of the support case so that the head cannot be pushed down.
The liquid ejection pump as described. 4. A detent mechanism C is provided between the stem 5 and the supporting case 3 so that the stem can move up and down and cannot rotate. The nozzle 6 is rotatably fitted, and the communication hole 49 formed in the upper part of the stem 5 and the nozzle base end opening are communicated by the rotation of the head 7 with respect to the stem 5.
2. The liquid ejection pump according to claim 1, wherein the liquid ejection pump is configured to open and close. 5. The liquid ejection pump according to claim 1, wherein a spacer 52 is detachably attached to a lower portion of the head in a state where the lower end of the outer periphery of the stem 5 is slidably engaged with the lower end of the inner periphery of the guide cylinder 12. 6. The liquid jet pump according to claim 5, wherein the spacer is a spacer 52A provided with a nozzle cap 55.