JP5384127B2 - Liquid ejector - Google Patents

Description

  The present invention is a liquid ejector that enables ejection of contents by pushing down and returning a piston in a cylinder disposed inside a container mouth portion by operating a head. It relates to a technique for enabling inhalation.

  In a conventional liquid ejector, there is a non-return valve that opens and closes a suction port of a cylinder in accordance with the movement of a piston, and elastically holds an outer edge of a valve element disposed above the suction port with a plurality of connecting pieces ( For example, see Patent Document 1).

Japanese Patent No. 3828336

  However, in the conventional technique, when a negative pressure is generated in the filling space, the entire valve body is lifted to open the suction port of the cylinder, so that the outer edge of the valve body is elastically supported by the connecting piece. For this reason, in the prior art, since the movement of the valve body is regulated at its outer edge, the movement of the valve body is regulated near the outer edge, so the flow path at the time of opening is narrow, for example, the inner solution If the viscosity is high, it takes time to suck a predetermined amount.

  An object of the present invention is to provide a novel liquid ejector capable of realizing easy suction into a cylinder by enlarging a flow path area when opened.

The present invention provides a cylinder that is disposed inside a container mouth portion and has a suction port that communicates with the container at its lower end, and a piston that is disposed inside the cylinder and forms a filling space for contents between the cylinder. When, a liquid ejector with a check valve to open the inlet and the head for ejecting the contents of the filling space to the outside, by the return of the piston by depression of the piston,
The cylinder has a peripheral wall surrounding the suction port inside thereof,
The check valve is looped over an annular seat portion disposed in an annular recess formed between an inner surface of the cylinder and an outer surface of the peripheral wall, and is passed over the upper surface of the seat portion. having between hanging passing portion from the inlet port is spaced upper, a base portion hanging toward from the hanging pass portion in the center of the suction port, the flexibility provided at the lower end of the base portion A thin plate valve body , wherein the seat portion, the span portion, the base portion, and the valve body are integrally formed, and the valve body is in contact with the upper surface of the peripheral wall. Is.

  For example, a thin plate member (part) can be used for the valve body, and by projecting a part that contacts the cylinder, the part can be configured as an annular ridge surrounding the suction port. .

  In the conventional technique, the outer edge of the valve body is elastically supported by the connecting piece. For this reason, in the prior art, since the connecting piece connected to the outer edge of the valve element becomes an obstacle, there is room for improvement in the expansion of the flow path when opened.

  In contrast, according to the present invention, since the valve body is provided at the lower end of the base portion suspended from the spanning portion, there is no obstacle on the outer edge of the valve body, so a large flow path is ensured when the valve body is opened. be able to.

  Therefore, according to the present invention, by increasing the flow path area when opened, for example, even a highly viscous content can be easily sucked into the cylinder.

  In addition, by projecting either one of the part of the valve body that the cylinder contacts and the part of the cylinder that the valve body contacts, the part is configured as an annular ridge that surrounds the suction port. By reducing the contact area between the valve body and the cylinder, it becomes difficult for the valve body to adhere to the cylinder, so that the flow area at the time of opening can be increased while improving the opening / closing function.

It is principal part sectional drawing shown in the state which mounted | wore the container with the liquid ejector which is one form of this invention. It is principal part sectional drawing which shows the closed state of the suction valve which concerns on the same form in the area | region X of FIG. It is principal part sectional drawing which shows the open state of the suction valve which concerns on the same form in the area | region X of FIG. It is a perspective view which shows typically the suction valve which concerns on the same form.

  Hereinafter, with reference to drawings, the liquid ejector 1 which is one form of this invention is demonstrated in detail.

  The liquid ejector 1 according to the present invention is mounted on a liquid container (hereinafter referred to as “container”) 30 filled with an internal solution C having a high viscosity typified by an emulsion, and a user can open and close an openable ejection head (hereinafter “ By operating the head “) 9, the inner solution C filled in the container 30 can be taken out to the outside by a predetermined amount corresponding to the pushing-down and returning operation through the head 9.

Reference numeral 2 denotes a cylinder which is disposed inside the mouth portion 31 of the container 30 and has a lower end portion 2 a formed with a suction port A ₁ leading to the container 30.

Cylinder 2 has its lower end (hereinafter "the cylinder bottom end") to the outside of 2a, the tubular wall 2b surrounding the inlet A ₁ is suspended together. A tube T for sucking the inner solution C in the container 30 is attached to the cylindrical wall 2b.

In contrast, on the inner side of the cylinder bottom portion 2a, a peripheral wall 2c surrounding the inlet A ₁ is integrally provided. As a result, the suction port A ₁ is configured so that it cannot be directly contacted from within the cylinder 2.

  Reference numeral 3 denotes a piston which is disposed inside the cylinder 2 and forms a filling space R of the content liquid C with the cylinder 2. Reference numeral 4 denotes a piston guide having a lower end portion 4a that holds the piston 3 so as not to fall off, and a shaft (hereinafter referred to as a “piston guide shaft”) 4b penetrating the inside of the piston 3 formed therein.

  Reference numeral 5 denotes a stem that holds the piston 3 in a slidable manner while holding the piston guide shaft 4b on its inner side to prevent it from coming off. The lower end portion 5 a of the stem 5 functions as a stopper that restricts the piston 3 from rising.

  Reference numeral 6 denotes a ring member that has an opening that penetrates the stem 5 and is fitted and held on the upper inner side of the cylinder 2. The ring member 6 functions as a stopper for the stem 5 by being fitted and held in the cylinder 2.

  Reference numeral 7 is a flange member fixed to the upper outside of the stem 5 and holding the return spring 8 together with the ring member 6. Thus, the stem 5 can be exposed from the ring member 6 with a constant height by receiving upward biasing force (elastic force) from the return spring 8 via the flange member 7.

  Reference numeral 9 denotes a head that pushes down the piston 5 through the stem 5 when the user pushes down against the urging force of the return spring 8. As will be described later, the head 9 compresses the content liquid C in the filling space R and simultaneously ejects it to the outside world by being pushed down.

The head 9 has a passage that communicates with the stem 5 and is connected to the stem 5 and a passage that communicates with the joint 9a. The head 9 is connected to the joint 9a so as to be movable up and down. A head main body 9b that causes supply and discharge of contents through the stem 5, a nozzle 9c that has a passage that communicates with the head main body 9a, protrudes laterally from the head main body 9a, and can be advanced and retracted into the passage of the nozzle 9c. in comprising a Note nozzle pin 9d to rise to opening and closing of the outlet a ₂ of deployed the nozzle 9c, and a mechanism 9e to occur in response to depressing and returning the reciprocating of the nozzle pin 9d head body 9b.

Reference numeral 9e denotes a lever mechanism that is disposed between the joint 9a and the head main body 9b, and causes the advancement / retraction of the nozzle pin 9d to occur according to the depression and return of the head main body 9b. Lever mechanism 9e comprises a support plate 9e ₁ which is fixed to the head main body 9b, a lever 9e ₂ rotatably supported by the support plate 9e _1, represented by the return spring for applying a biasing force to the lever 9e ₂ and a resilient member 9e ₃ being.

The lever 9e ₂ has one end e _{9 (a)} extending from a shaft portion 9e _{2 (s)} rotatably held by the support plate 9e ₁ , and this one end e _{9 (a)} has a nozzle pin A notch for fitting the rear end 9d ₁ of 9d with a degree of freedom is formed. As a result, the rear end 9d ₁ of the nozzle pin 9d is connected to the one end e _{9 (a)} of the lever 9e ₂ so that the forward / backward movement thereof is allowed.

On the other hand, the other end e _{9 (b)} of the lever 9e ₂ is divided into two branches left and right (in the drawing, the front and back sides in the drawing ₎ with the shaft portion 9e _{2 (s)} as a base point, and each contacts the joint 9a. As a result, the other end e _{9 (b)} of the lever 9e ₂ presses the joint 9a as the head body 9b is pushed down, so that the lever 9e ₂ tilts backward due to a reaction force when the joint 9a is pressed. .

Elastic member 9e ₃ is interposed between the head body 9b and the nozzle pin 9d, as shown in FIG. 1, to urge the nozzle pin 9d by the elastic force (restoring force) to the front (the spout A ₂ direction).

Thereby, the lever 9e ₂ is positioned as shown in FIG. 1 because the nozzle pin 9d is urged forward by the elastic force of the elastic member 9e ₃ unless the head main body 9b is pushed down. When the head body 9b is pushed down, the nozzle pin 9d moves backward from the position shown in FIG. 1 against the elastic force of the elastic member 9e ₃ due to the reaction force when the lever 9e ₂ presses the joint 9a.

That is, in this embodiment, when the elastic (restoring) force of the elastic member 9e ₃ is applied to the nozzle pin 9d without pushing down the head main body 9b, the nozzle pin 9d is injected by the restoring force of the elastic portion 9e ₃ as shown in FIG. While the outlet A ₂ is sealed, when an external force against the elastic (restoring) force of the elastic member 9e ₃ is applied to the other end e _{9 (b)} of the lever 9e ₂ by pushing down the head body 9b, the nozzle pin 9d to open the spout a ₂ due to the recession.

Here, reference numeral 10 denotes a suction valve (check valve) that is disposed inside the cylinder 2 and controls the opening and closing of the suction port A ₁ . The suction valve 10 is made of a flexible material such as a synthetic resin.

In this embodiment, as shown in FIG. 2 or the like, on the inside of the cylinder bottom portion 2a, a peripheral wall 2c surrounding the inlet A ₁ is integrally provided. Therefore, an annular recess D is formed between the inner surface (hereinafter referred to as “cylinder inner surface”) f _{1 of the} cylinder 2 and the outer surface (hereinafter referred to as “circumferential wall outer surface”) f ₂ of the peripheral wall 2c. Yes.

On the other hand, the suction valve 10 has an annular seat portion 10a disposed in the above-described recess D as shown in FIG. Seat 10a, as shown in FIG. 2 or the like, by projection f _p which is bulged inwardly a portion of the cylinder inner surface f _1, are retaining held in the cylinder 2.

Further, the suction valve 10, as shown in FIG. 4, the seat 10a, is stretched on the upper surface f _10, over passes which are spaced from the inlet A ₁ on the upper side of the suction port A ₁ It has the part 10b integrally. As a result, the opening A ₃ formed inside the seat portion 10a communicates with the two openings A ₄ partitioned by the spanning portion 10b, and the inner solution between the opening A ₃ and the two openings A _4. Allow distribution of C.

The valve body suction valve 10, as shown in FIG. 2 or the like, a base 10c extending downward toward the over pass section 10b in the center of the suction port A ₁ (ejector axis O), provided at the lower end of the base portion 10c 10d integrally.

As shown in FIG. 4, the valve body 10d has a thin circular shape formed so as to cover the upper surface of the peripheral wall 2c (hereinafter referred to as the “peripheral wall upper surface”) f ₃ and has flexibility. ing. Thus, the valve body 10d, as shown in FIG. 3, without being in any way restricted to the outer edge e _10, it is possible to deform the base portion 10c to the base point.

Therefore, when the user is in a steady state in which the head 9 is not operated, or when the user pushes the head 9 to cause the ejection operation, the suction valve 10 has the valve body 10 as shown in FIG. Since the upper surface f ₃ is in contact, the suction port A ₁ is sealed to prevent the inhalation of the internal solution C, while when the user stops the operation and returns the head 9, the suction valve 10 3, the valve body 10 is separated from the upper surface f ₃ of the peripheral wall by the negative pressure generated in the filling space R, so that the suction port A ₁ is opened and the inhalation of the internal solution C is allowed.

In other words, the suction valve 10 seals the suction port A ₁ through the peripheral wall 2c when the piston 3 is pushed down, while opening the suction port A ₁ with the negative pressure generated between the piston 3 and the piston 3 when the piston 3 is returned. To do. According to the present invention, when the seat portion 10a is an annular body, the seat portion 10a surrounds the valve body 10d. In this case, since the valve body 10d is protected by the seat portion 10a, interference from the outside with respect to the valve body 10d can be suppressed. For this reason, if the seat portion 10 is an annular body, it is possible to prevent deformation due to interference from the outside with respect to the valve body 10d during and after the production of the suction valve 10.

The prior art, instead of lowering held suspended in the valve body 10d base 10c, have elastically supporting the outer edge e ₁₀ of the valve body 10d in the connecting piece. Therefore, in the conventional art, the connecting piece connected to the outer edge e ₁₀ of the valve body 10d from becoming an obstacle, there is room for improvement in expansion of the channel at the time of opening.

In contrast, the present invention, by providing the lower end of the hanging is allowed base portion 10c from the transfer unit 10b multiplying the valve body 10d, because the outer edge e ₁₀ of the valve body 10d is no obstacle at the time of opening A large flow path can be secured.

  Therefore, according to the present embodiment, the flow passage area can be increased when the valve is opened, so that, for example, even the high-viscosity content liquid C can be easily sucked into the cylinder 2. In addition, in the configuration of the suction valve 10 according to the present embodiment, the suction valve 10 includes the spanning portion 10b for suspending and holding the valve body 10d. Therefore, the shaft 10e is integrally provided from the upper surface of the spanning portion 10b. As shown in FIG. 1, the inside of the piston guide 4 can be slidably held.

In particular, in this embodiment, as shown in FIG. 2 and the like, a portion of the valve body 10d that contacts the peripheral wall upper surface f ₃ (hereinafter referred to as “contact portion”) 10d ₁ protrudes toward the peripheral wall upper surface f _3. ing. That is, in this embodiment, the contact portion 10d ₁ of the valve body 10d is configured as an annular ridge that surrounds the suction port A ₁ .

As in the present embodiment, according to the valve body 10d, by projecting the contact portion 10d _1, the site 10d _1, be configured as an annular ridge surrounding the inlet A _1, the valve body 10d and the cylinder 2 (the peripheral wall by the contact area between the upper surface f ₃₎ is reduced, that the valve body 10d is hardly adhered to the cylinder 2 (the peripheral wall top face f _3), promote the expansion of the flow area at the time of opening while improving the opening and closing function be able to. According to the present invention, the peripheral wall f ₃ with which the valve body 10d comes into contact can be configured as an annular ridge that surrounds the suction port A ₁ in the part of the cylinder 2, and in this case also, the contact part 10d. The effect is the same as when ₁ is an annular ridge.

  In addition, the liquid ejector 1 of the present embodiment is fitted to the flange 2d formed on the upper end portion of the cylinder 2 with an outer body 11 that is detachably screwed with respect to the container mouth portion 31, and holds the retainer. When mounted on the container mouth portion 31, the seal member 12 that seals the upper end of the container mouth portion 31 is held on the outer peripheral surface of the cylinder 2 positioned below the flange 2d. That is, the liquid ejector 1 of this embodiment is unitized separately from the container 30. However, according to the present invention, the configuration in which the liquid ejector 1 is directly assembled to the container 30 is not denied. Moreover, although this form has the overcap 13 which fits to the exterior body 12 so that attachment or detachment is possible, the said cap 13 can also be provided as needed.

  The above description shows the preferred embodiment of the present invention, but various design changes can be made according to the application. For example, the present invention can be applied to various liquid ejectors as long as the piston arranged in the cylinder is moved according to the operation on the head and the check valve (suction valve) is opened and closed according to the movement. . In addition, as a head according to the present invention, a head having a simple structure that merely causes the inner solution of the container to be ejected to the outside through the stem by causing the movement of the piston is used instead of the opening-and-closing ejection head as in the above embodiment. it can.

  The present invention can be applied not only to containers for containing contents such as shampoos, rinses, liquid soaps and cosmetics, but also to various containers containing contents liquids.

DESCRIPTION OF SYMBOLS 1 Liquid ejector 2 Cylinder 2c Perimeter wall 3 Piston 4 Piston guide 5 Stem 6 Ring member 7 Flange member 8 Return spring 9 Opening-and-closing type ejection head 10 Suction valve (check valve)
10a seat 10b span 10c base 10d valve body 10d ₁ contact part 10e shaft 11 exterior body 12 seal member 13 overcap

Claims (2)

A cylinder disposed inside the container mouth and having a suction port communicating with the container at its lower end; a piston disposed inside the cylinder and forming a filling space for the contents between the cylinder; and the piston a liquid sprayer having a check valve to open the inlet and the head for ejecting the contents of the filling space to the outside, by the return of the piston by depression of,
The cylinder has a peripheral wall surrounding the suction port inside thereof,
The check valve is looped over an annular seat portion disposed in an annular recess formed between an inner surface of the cylinder and an outer surface of the peripheral wall, and is passed over the upper surface of the seat portion. having between hanging passing portion from the inlet port is spaced upper, a base portion hanging toward from the hanging pass portion in the center of the suction port, the flexibility provided at the lower end of the base portion A thin plate valve body , wherein the seat portion, the span portion, the base portion, and the valve body are integrally formed, and the valve body is in contact with the upper surface of the peripheral wall. Liquid ejector. In claim 1, a portion of the valve body in which the cylinder is in contact, by either by projecting the one of portion of the cylinder to which the valve body is in contact, the sites collision annular surrounding the intake port A liquid ejector characterized by being configured as a strip.

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