JPH0754125Y2 - Fluid discharge mechanism - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a piston having a valve that can be opened only in the fluid discharge direction and a cylinder that also has a valve that can be opened only in the fluid discharge direction. The present invention relates to a fluid discharge mechanism which slides to the outside to discharge an appropriately viscous fluid stored in a storage chamber made of a soft material to the outside. Here, as the fluid, cosmetics such as foundation, lip color, cream, and lotion are particularly suitable, but stationery such as glue and paint, and seasonings such as hot pepper can also be mentioned as an example.

(Prior Art) The fluid ejection mechanism of the above-mentioned type (hereinafter, "this type ejection mechanism").
One example is described in JP-B-55-3232. The description in the gazette is as follows: "The mouth and neck are formed to the extent that they are not easily deformed, and the body and the bottom wall are formed to the extent that they are flexible and easily deformable. Into the mouth and neck of the container filled with the fluid, a cylinder with a valve in the lower part is positioned so that the lower part of the cylinder is located on the inner side of the body, and it is airtightly screwed together with a nozzle at the upper end. An operating member in which a piston forming member having a hole is attached to the lower end of a discharge pipe provided with a pouring head to form a piston at the lower end, and a discharge valve is provided in the middle of the discharge path from the lower end face of the piston to the nozzle hole. To
The pouring head is discharged upward, and the piston is fitted in the cylinder so that it can move up and down.Here, in order to prevent the piston from being pulled out, a guide provided in the cylinder is integrated with the cylinder. The discharge pipe slidably penetrates through the hole of the holding plate whose peripheral edge is locked by the mating piece, and the outer projection provided at the lower end of the discharge pipe can be engaged with the peripheral wall portion of the hole of the holding plate. The thing. "

(Problems to be Solved by the Invention) Not only in this kind of discharge mechanism, but in general, in one mechanism body composed of a plurality of members, each of the plurality of members constituting the mechanism body is appropriately composed of a plurality of parts. Of course, it does not matter. However, as long as it can be recognized as one "member", it is a prerequisite that the member has independence in handling from other members. In fact, such independent handling is a prerequisite for satisfying the ease of preparation of the members themselves and the ease of assembly of the mechanism as a whole. In other words, each member
In view of improving the productivity of the mechanism as a whole and manufacturing it at a low cost, it must be composed of a plurality of parts or one part.

In view of this point, it can be seen that the one disclosed in the above publication still has room for improvement as described below.

As described above, in the one described in the above publication, the “holding plate” is used.
(“” Indicates the expression in the publication. The same applies below.)
By engaging an outer protrusion provided at the lower end of the "discharging pipe" with the peripheral edge of the hole, the "piston" is prevented from being pulled out. In addition, the periphery of this "holding plate" is the "cylinder".
It is locked by the "engagement protrusion" of the "guide cylinder" integrated with the. Therefore, as an assembling method, the "pressing plate" is locked to the "engaging protrusion" of the "guide cylinder" with the "discharging pipe" penetrating the "pressing plate", or the "coil spring" is used. Against the urging force of the "piston forming member"
Either the "pressing plate" is locked to the "engaging protrusion" of the "guide cylinder" so that the "piston forming member" is fitted to the "discharging pipe" so that the Let's get crab.
Either way, or if there is another way,
In any case, the "holding plate" after being locked to the "engagement protrusion" of the "guide cylinder" is fixed or integral with the "guide cylinder" or the "cylinder" integrated with this "guide cylinder". It has become a thing.

In short, although it can be said that, in the one described in the above-mentioned publication, the piston and the cylinder in the present invention are regarded as one "member" as a whole, the piston and the cylinder are not referred to as different "members". Since it is not done, it is very troublesome to assemble, and also
It means that many parts are needed.

Certainly, one member may be composed of a plurality of parts. However, it is not necessary to bother to form a plurality of parts. If it can be made into one component, it is enough to make one component. Thereby, the productivity is improved and the manufacturing cost can be reduced. The quality is stable, and the advantage that this type of discharge mechanism can exhibit is that the reliable and appropriate fluid discharge property by a simple pressing operation can be effectively exhibited.

Therefore, after all, the piston and cylinder are
Separate "members" assembled to slide on each other
Therefore, it is preferable that the troublesome assembling is reduced and that many parts are not required. Then, it is preferable to prevent the piston and the cylinder after the assembly from coming off.

(Means for Solving the Problems) For the above purpose, it is necessary to provide an engaging portion on a “member” called a piston and a “member” called a cylinder before they are assembled together. Moreover, they must be easily assembled with each other. In view of this, the present invention provides a storage chamber made of a soft material by relatively sliding a piston having a valve that can be opened only in the fluid discharge direction and a cylinder that also has a valve that can be opened only in the fluid discharge direction. A fluid discharge mechanism for discharging a stored appropriately viscous fluid to the outside, as an engaging portion for engaging the piston and the cylinder so as not to separate from each other, with respect to the assembly of the piston and the cylinder. What can be overcome is the gist of a fluid discharge mechanism provided in these piston and cylinder.

(Example) An example will be described with reference to the attached FIGS. 1 to 3. First, in FIG. 1, reference numeral 1 indicates a fixed plate. Although an example will be given later, it can be used, for example, as a fitting body to a separate container. A through hole 2 is provided in the fixed plate 1, and a hollow cylindrical piston 4 having a valve 3 on the upper surface is attached to the through hole 2. These are one "member" as a whole. This is because it may be composed of a plurality of parts as appropriate, and of course, the fixing plate 1 and the piston 4 may be integrated into one part as long as they can be molded. Here, an outer projection 5 is provided on the outer surface of the upper portion of the piston 4. It serves as a sliding contact portion for a cylinder 8 which will be described later. For sliding the piston / cylinder, the entire outer peripheral wall portion of the piston can be used as the sliding contact portion, but the sliding contact portion must be tightened (to the piston). Since the force of (relative to) and expansion (to the cylinder) is applied, it is preferable to make the sliding contact area narrow in order to smooth the sliding.

Further, reference numeral 6 indicates a pressing plate. It is an object to which an external force for sliding the piston / cylinder is applied, and is integrally provided with a cylinder 8 having a valve 7 on its upper surface.
Contrary to the fixed plate 1, it shows an example of reducing the number of parts in one member. Here, the cylinder 8 is slidably fitted to the piston 4.

In this way, the "piston 4" member having the fixed plate 1 portion and the "cylinder 8" member having the pressing plate 6 portion are assembled so that the piston 4 portion and the cylinder 8 portion are slidably fitted. The outer projection 5 provided on the piston 4 is used to prevent the two from coming off. That is, an inward projection 9 is provided at the lower end of a cylinder 8 as a slidable contact cylinder portion with respect to the piston 4, and the piston 4 is provided by an elastic member 10 such as a spring stretched between the fixed plate 1 and the pressing plate 6. The outer projection 5 and the inner projection 9 are engaged with each other by the urging force in the direction of separating the cylinder 8 and the cylinder 8 from each other.
It doesn't come off. This engagement is satisfied by deforming the inner protrusion 9 so as to ride over the outer protrusion 5 during assembly. Incidentally, in terms of engagement between the two members,
For example, a step portion may be provided on the inner surface of the fixed plate 1, and the outer peripheral portion of the pressing plate 6 may be engaged with this step portion. But,
Since the piston 4 is provided with the outward projection 5 as a sliding contact portion, it is more efficient to use this.

However, when the inner protrusion 9 gets over the outer protrusion 5, an excessive force is applied to the outer protrusion 5 to unnecessarily deform it, which impairs the function of the outer protrusion 5 as a sliding contact portion. It is not preferable. Therefore, the illustrated outer protrusion 9 is
The shape is as smooth as possible.

However, even then, the height of the outer projection 5 as a projection is restricted to some extent, and the sliding contact force with respect to the cylinder 8 must be set to a small value. The smaller the sliding contact force, the higher the risk of leakage of fluid from the sliding contact portion, and the more serious problem is that air enters through the sliding contact portion. Generally, air is more likely to pass through a narrow space than a viscous fluid.

Therefore, in the illustrated case, a cylindrical object made of a thin material is used in the storage chamber 11 that stores a fluid having an appropriate viscosity for makeup, writing, and the like. That is, as shown in FIG. 2, when the pressing plate 6 is pushed downward against the elastic force of the elastic member 10 as shown in FIG. As shown in FIG. 3, when the cylinder 8 is lifted by the elastic force of the elastic member 10 by releasing the pressure of the pressing plate 6 as shown in FIG. 11
Since the fluid is filled with the fluid through the valve 3 into the piston 4, the cycle can be sufficiently reduced and deformed even if the suction force in FIG. 3 is small.
If a small suction force is sufficient, even if the sliding contact force by the outer protrusion 5 is small, the invasion of air can be prevented as much,
Sliding is also smooth. Originally, the storage chamber need only be a soft one that can be reduced and deformed according to the consumption of the stored fluid. Therefore, blow molded products can be used, but blow molded products are Inevitably, it becomes thick, and the part that is difficult to deform partially (in the case of the above publication, "the mouth and neck that does not easily deform") is continuous from the part that is relatively deformable. Because,
From the initial stage of use, a relatively large suction force is already required. By the way, for cosmetics such as cosmetics that do not like to be deteriorated, the mixing of air is not preferable. The storage chamber 11 made of a thin material is attached to the lower portion of the fixed plate 1 by heat welding, ring tightening or the like so as to communicate with the piston 4 of the fixed plate 1.

Although an example has been described above, various other modifications can be made without departing from the spirit of the invention. For example, as shown in FIG. 4, one end of the fixed plate 1 and the pressing plate 6 is pivotally attached by a pin 12, and the pressing plate 6 can be pushed downward with this pivoting portion as a fulcrum. As shown in FIG. 6, the fixed plate 1 having the storage chamber 11 attached thereto is fitted into the container 15 (in the figure, reference numeral 16 is a fitting projection for allowing a cap (not shown) to be fitted). As described above, the pressing plate 6 and the fixing plate 1 are downsized, and the storage chamber 11 is flattened, or, as shown in FIG. 7, a hood 14 having a guide outlet 13 on the valve 7 of the cylinder 8 of the pressing portion 6. May be arranged so that the top of the hood 14 can be pressed. Although not shown, a guide groove for pushing the pressing plate 6 may be provided on the inner surface of the fixed plate 1.

(Effect of the Invention) As described above, the soft material is made by relatively sliding the piston having the valve that can be opened only in the fluid discharge direction and the cylinder that also has the valve that can be opened only in the fluid discharge direction. A fluid discharge mechanism configured to discharge an appropriately viscous fluid stored in a storage chamber consisting of a piston and a cylinder, as the engaging portion for engaging the piston and the cylinder so as not to come off from each other. According to the fluid discharge mechanism of the present invention in which the piston and the cylinder are provided, it is possible to slide the piston and the cylinder as separate "members" with respect to each other. Due to the ease of assuring that both can be prevented from coming off by simply assembling them, they have good productivity and can be manufactured at low cost, and their quality is stable. It is possible to effectively exert a reliable and appropriate amount of fluid dischargeability by a simple pressing operation, which is a merit that can be exerted.

[Brief description of drawings]

FIG. 1 is a cross-sectional view for explaining an embodiment of the present invention, FIGS. 2 and 3 are cross-sectional views for explaining the operation of FIG. 1, and FIGS. FIG. 3 is a cross-sectional view for explaining another embodiment of the present invention. DESCRIPTION OF SYMBOLS 1 ... Fixed plate, 2 ... Through hole, 3 ... Valve, 4 ... Piston, 5 ... Outer projection, 6 ... Pressing plate, 7 ... Valve, 8 ... Cylinder, 9 ... Inner projection, 10 ... Repulsion member, 11 … Storage room, 12… Pin, 13… Guide outlet, 14… Hood, 15… Container, 16… Fitting protrusion.

Claims (2)

[Scope of utility model registration request] 1. A piston having a valve which can be opened only in a fluid discharge direction and a cylinder which also has a valve which can be opened only in a fluid discharge direction are slid relative to each other to be housed in a housing chamber made of a soft material. A fluid discharge mechanism adapted to discharge an appropriately viscous fluid to the outside, and as an engaging portion for engaging the piston and the cylinder so as not to come off from each other, for assembly of the piston and the cylinder, A fluid discharge mechanism in which these pistons and cylinders are capable of overcoming. 2. The engaging portion of the piston is provided as an outer protrusion that is a sliding contact portion with respect to the cylinder of the piston, and the engaging portion of the cylinder is an inward protrusion at a sliding contact cylinder portion of the cylinder with respect to the piston. The fluid discharge mechanism according to claim 1, wherein a cylindrical material made of a thin material is used as the soft material which is provided and constitutes the storage chamber.