JP4900696B2 - Liquid discharge pump - Google Patents

Description

  The present invention relates to a liquid discharge pump capable of discharging liquid by pressing a pressing head.

A liquid ejection pump configured to move up and down the vertical movement member so that liquid in the container is sucked into the cylinder via the suction valve and the liquid in the cylinder can be ejected from the nozzle via the discharge valve from the stem. Known (see Patent Document 1).
JP-A-8-268458

  However, the liquid ejection pump described in Patent Document 1 has a problem that the liquid remaining in the nozzle touches the outside air and solidifies after the liquid is ejected due to the descending of the vertical movement member.

  An object of the present invention is to provide a liquid discharge pump that prevents the liquid in the nozzle from solidifying.

  Another object of the present invention is to provide a liquid discharge pump that can be easily assembled.

The present invention relates to a pressing head type liquid jet pump in which a pressing head 35 having a nozzle 66 is fitted to an upper end portion of a stem 30 inserted in an upwardly biased state into the cylinder 1.
The pressing head 35 is divided into upper and lower members of an upper head portion 60 and a lower head portion 40, and the upper head portion is slidably fitted to the lower head portion in an upwardly biased state,
The lower head portion 40 is fitted to the upper end portion of the stem 30 via the mounting cylinder 41, and a nozzle closing member 50 is projected from the lower head portion 40, and the nozzle 66 base end is connected to the inner surface of the upper end portion of the mounting cylinder 41. While fitting freely up and down, the nozzle tip is brought into contact with the nozzle closing member 50 to close the nozzle 66 tip,
A resilient force for upwardly biasing the upper head portion 60 is set smaller than a resilient force for upwardly biasing the stem 30;
The nozzle 66 is provided so that the liquid can be discharged when the upper end of the nozzle 66 is released downward from the nozzle closing member 50 by pressing the upper head portion 60 down.

  In the present invention, the upper head portion 60 is slidably fitted to the outer surface of the lower head portion 40, and either the upper wall 42 of the lower head portion 40 or the lower surface of the top wall 61 of the upper head portion 60 is used. The upper head portion 60 is biased upward by forming a spring portion 49 in the upper portion.

Further, according to the present invention, the nozzle 66 hangs the drooping cylinder 62 from the top head 61 of the upper head portion, and the lower portion of the dripping cylinder is fitted to the inner surface of the upper end portion of the mounting cylinder 41 so as to be movable up and down. A discharge cylinder 65 projecting from the upper part of the cylinder 62 so as to freely move up and down is provided.

  Further, according to the present invention, the nozzle closing member 50 includes a nozzle fitting space 53 in which a nozzle closing surface 54 is formed at the tip, and when the push-down head 35 is raised, the nozzle 66 is moved to the nozzle fitting space 53. Further, when the push-down head 35 is lowered by being pushed down, it can be detached from the nozzle fitting space 53 downward.

Furthermore, the present invention is configured such that the auxiliary cap 20 is fitted to the neck portion of the container body 8 from which the lower portion of the cylinder 1 is suspended , and the lower portion of the lower head portion is formed to be fitted to the auxiliary cap.
The lowering prevention rod 70 is suspended from the upper head portion top wall 61 when not in use, a through hole 42a is formed in the upper wall 42 of the lower head portion 40, and the lowering prevention rod 70 is inserted into the through hole 42a ,
When the lower head portion 40 is fitted to the auxiliary cap 20 , the lowering prevention rod 70 is provided so as to be able to contact the auxiliary cap top wall 22.

  In the present invention, since the nozzle closing member capable of closing the nozzle tip is provided, the liquid remaining in the nozzle can be prevented from solidifying after the liquid is discharged.

  Further, according to the present invention, since the spring portion for urging the upper head portion upward is formed in the lower head portion or the upper head portion, the pressing head is easily assembled.

  Furthermore, in the present invention, since the lowering prevention bar is provided when the upper head portion is not used, the spring piece can be prevented from being sag.

  The present invention will be described below with reference to embodiments shown in the drawings. In FIG. 1, the left direction is the front.

  FIG. 1 is a half sectional view of a liquid discharge pump, and FIG. 2 is an exploded perspective view of a pressing head.

Reference numeral 1 denotes a cylinder, which has an outward flange 2 protruding from the upper end of the peripheral wall, and a fitting cylinder portion 4 for fitting the auxiliary cap 20 from the inner periphery of the outward flange.

  A valve seat 6 is formed on the cylinder bottom wall 5, and a valve body 7 that can freely open and close the valve seat is provided. The lower end of the cylinder 1 is suspended into the container body 8 and the outward flange 2 is placed on the upper surface of the container body neck.

  Reference numeral 10 denotes a mounting cap, which extends an inward flange 11 from a peripheral wall fitted to the outer surface of the container body neck, and fixes the outward flange 2 of the cylinder 1 with the inward flange.

  Reference numeral 20 denotes an auxiliary cap which hangs the fitted cylinder 21 fitted to the fitting cylinder part 4 from the top plate 22 and a screw cylinder part 23 suspended from the periphery of the top plate 22 to the upper end in the cylinder. Has been established.

  Reference numeral 30 denotes a stem, and an annular piston 31 fitted to the inner peripheral surface of the cylinder 1 so as to be movable up and down is projected from the outer periphery of the lower end. The stem 30 is biased upward by a coil spring 32 that is contracted between the annular piston 31 and the valve body 7.

  Reference numeral 35 denotes a pressing head, which is formed of an upper head portion and a lower head portion 40. First, the lower head portion will be described.

  The lower head portion 40 has an outward flange 42 projecting from the upper end of an inner cylinder (mounting cylinder) 41 fitted to the outer surface of the upper end portion of the stem 30, and the outer cylinder 43 is suspended from the outer periphery of the outward flange.

    Then, the first notch 44 is formed in the upper front part of the inner cylinder 41, and the second notch part 45 and the third notch part 46 are formed in the front part of the outward flange 42 and the front upper part of the outer cylinder 43, respectively. . Further, the upper portion of the inner cylinder 41 has a larger outer diameter portion than the lower portion, and an upward stepped portion 47 is formed on the inner surface of the inner tube 41, and the lower end portion of the outer tube 43 has a larger outer diameter portion than the upper portion. Thus, an upward stepped portion 48 is formed on the outer surface of the outer cylinder 43, and a female screw is formed on the inner surface of the large outer diameter portion.

  Further, in this embodiment, the spring piece 49 is raised upward from an arbitrary portion of the outward flange 42 in an upwardly curved manner integrally with the outward flange. The spring piece 49 can also be provided on the upper head portion described later. Here, the elastic urging force of the spring piece 49 is set smaller than the elastic urging force of the coil spring 32 that urges the stem 30 upward for reasons described later.

  50 is a nozzle closing member, and a pair of mutually parallel leg portions 52 project rearward from the nozzle closing plate 51, and the rear ends of the leg portions 52 are integrally connected to both sides of the third notch portion 46 of the outer cylinder 43. In addition, by covering the upper surface of the front end between the pair of leg portions 52 with the upper plate 52a, a space surrounded by the nozzle closing plate 51 and the pair of leg portions 52 forms a nozzle fitting space 53, and the nozzle is closed. The plate 51 forms the nozzle closing surface 54. The nozzle closing surface 54 is preferably inclined obliquely downward and forward.

    The upper head portion 60 hangs the drooping cylinder 62 from the center of the lower surface of the top wall 61 so that the drooping cylinder is fitted to the inner surface of the inner cylinder 41 so as to be movable up and down. The cylinder 43 is fitted to the outer surface of the cylinder 43 so as to be movable up and down, and a fourth notch 64 having a lower surface opening is formed in the lower front portion of the peripheral wall 63.

    Further, by allowing the discharge cylinder 65 to protrude forward through the first notch 44, the third notch 46, and the fourth notch 64 from the drooping cylinder 62, liquid can be discharged from the discharge cylinder 65, Therefore, the drooping cylinder 62 and the discharge cylinder 65 form a nozzle 66.

    The front surface of the discharge cylinder 65 is preferably inclined obliquely downward and forward so as to be in close contact with the nozzle closing surface 54, and the front end portion of the upper wall of the discharge cylinder 65 is made thinner than the rear portion thereof, so that the discharge cylinder It is preferable to form a forward stepped portion 67 on the upper surface of the front end portion of 65.

    Here, the relationship between the nozzle 66 and the nozzle closing member 50 will be described. When the liquid is not discharged, the discharge cylinder 65 is fitted into the nozzle fitting space 53 from below, and the tip of the discharge cylinder 65 is the nozzle closing surface 54. The forward-facing stepped portion 67 is configured to be engageable with the rear surface of the upper plate 53.

  In the above description, the spring piece 49 is provided on the lower head portion. However, the spring piece 49 is not limited to this, and may be provided on the top wall of the upper head portion. In this case, the spring piece is bent downward and hangs down.

  Reference numeral 70 denotes a lowering prevention rod, which is suspended from the top wall 61 of the upper head portion 60 and is inserted into a through hole 42 a formed in the outward flange 42 of the lower head portion 40. This lowering prevention bar functions when not in use. That is, when not in use, as shown in FIG. 4, the lower head portion is screwed to the auxiliary cap 20, and the lowering prevention rod lower end is set to contact the top wall 22 of the auxiliary cap 20 at the time of screwing.

    The reason for doing this is that when an object or the like is placed on the upper head portion 60 when not shown in FIG. 4, the upper head portion 60 is lowered and the spring piece 49 is deformed downward. If this is for a long time, the spring piece 49 will lose its elasticity, so that the lowering prevention rod abuts against the auxiliary cap 20 to prevent this, and the upper head portion 60 is lowered when not in use. Is intended to prevent this.

  Next, the operation will be described.

  In order to discharge the liquid, the upper head portion 60 may be pushed down against the elastic force of the spring piece 49. Then, as shown in FIG. 3, the elastic urging force of the spring piece 49 causes the stem 30 to move upward. Since it is smaller than the elastic urging force of the urging coil spring 32, the stem 30 does not descend at the initial stage of depression, only the upper head portion 60 descends, and the discharge cylinder 65 forming the nozzle 66 is fitted into the nozzle. The front surface of the discharge cylinder 65 is separated from the nozzle closing surface 54 by separating downward from the space 53. Accordingly, the nozzle 66 is in a state capable of discharging liquid because the nozzle opening is opened.

  When the upper head part 60 is lowered and the spring piece 49 is laid down, the pressing force acts on the outward flange 42 of the lower head part 40. As a result, the stem 30 descends against the elastic urging force of the coil spring 32. Then, the liquid in the cylinder opens the discharge valve, rises in the stem 30 and is discharged from the nozzle 66.

      When the hand is released from the upper head part 60 after ejection, the stem 30 rises and the upper head part 60 rises by the urging force of the spring piece 49. As a result, the discharge cylinder 65 is fitted into the nozzle fitting space 53 from below, and the tip of the discharge cylinder 65 comes into close contact with the nozzle closing surface 54. Thus, since the opening of the nozzle 66 is closed immediately after the liquid is discharged, the time for the liquid remaining in the nozzle 66 to come into contact with air is short, and thus the liquid in the nozzle is prevented from solidifying.

    After use, the upper head portion 60 may be slowly pushed down so that the female screw on the inner surface of the large outer diameter portion of the outer cylinder 43 is screwed into the auxiliary cap 20, and after the upper head portion 60 is released, As shown in FIG. 4, the nozzle 66 is fitted into the nozzle fitting space 53.

It is a half sectional view of the liquid discharge pump concerning the present invention. It is a disassembled perspective view of a pressing head. It is action explanatory drawing at the time of pressing down of a pressing head. It is a half cross-sectional view showing a state in which the used pressing head is screwed into the container.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Cylinder 30 Stem 35 Pushdown head 40 Lower head part 50 Nozzle closing member 53 Nozzle fitting cylinder 54 Nozzle closing surface 60 Upper head part 61 Top wall 62 Drooping cylinder 65 Discharge cylinder 66 Nozzle

Claims (5)

In a push-down head type liquid jet pump in which a push-down head (35) having a nozzle (66 ) is fitted to an upper end portion of a stem (30) inserted in an upwardly biased state into a cylinder (1) ,
The pressing head (35) is divided into two upper and lower members of an upper head part (60) and a lower head part (40), and the upper head part is slidably fitted to the lower head part in an upward biased state. Let
The lower head portion (40) is fitted to the upper end portion of the stem (30) through a mounting cylinder (41), and a nozzle closing member (50) is projected from the lower head portion (40) to protrude the nozzle (66 ) The base end is fitted to the inner surface of the upper end of the mounting cylinder (41) so as to be movable up and down, and the nozzle tip is brought into contact with the nozzle closing member (50) to close the tip of the nozzle (66) .
A resilient force for upwardly biasing the upper head portion (60) is set smaller than a resilient force for upwardly biasing the stem (30) ;
The liquid discharge pump according to claim 1, wherein the upper head portion (60) is pressed down so that the tip of the nozzle (66) is detached downward from the nozzle closing member (50) so that liquid can be discharged. Said upper head portion (60) of the lower head portion (40) causes slidably fitted to the outer surface, the upper wall (42) and the upper head portion of the lower head portion (40) top wall (60) (61) The liquid discharge pump according to claim 1, wherein the upper head portion (60) is biased upward by forming a spring portion (49) on one of the lower surface. The nozzle (66) hangs a drooping cylinder (62 ) from the top wall (61) of the upper head part and fits the lower part of the dripping cylinder to the inner surface of the upper end of the mounting cylinder (41) so as to be movable up and down. The liquid discharge pump according to claim 1 or 2, wherein a discharge cylinder (65) is provided so as to project from the upper part of the drooping cylinder (62) so as to freely move up and down the mounting cylinder (41) . The nozzle closing member (50) includes a nozzle fitting space (53) in which a nozzle closing surface (54) is formed at the tip, and when the push-down head (35) is raised, the nozzle (66) The fitting space (53) is fitted into the fitting space (53) , and when the push-down head (35) is lowered by being pushed down, it can be detached downward from the nozzle fitting space (53). The liquid discharge pump according to any one of 2 and 3. The auxiliary cap (20) is fitted to the container body (8) mouth and neck portion where the lower portion of the cylinder (1) is suspended , and the lower portion of the lower head portion is formed to be fitted to the auxiliary cap.
A lowering prevention rod (70) is suspended from the upper head top wall (61) when not in use, and a through hole (42a) is formed in the upper wall (42) of the lower head part (40) to prevent the lowering. Insert the rod (70) through the through hole (42a) ,
When the lower head part (40) is fitted to the auxiliary cap (20) , the lowering prevention bar (70) is provided so as to be able to contact the top wall (22) of the auxiliary cap. The liquid discharge pump according to any one of 1, 2, 3 and 4.

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