JPH033493Y2 - - Google Patents

Description

[Detailed Description of the Invention] "Industrial Application Field" The present invention relates to an elastic cap for a pump device used in cream-like substance dispensing containers and the like.

``Prior Art'' For example, in place of the elastic cap 5 of the cream dispensing container shown in FIG. 1, there is known a container equipped with an elastic cap 5 shown in FIG. 2b. The known elastic cap generally has a hemispherical shape, that is, a circular arc shape in longitudinal section, and has its top part serving as a push-down part, and an outwardly facing flange for attaching the cap to the lower end of its peripheral wall.

Furthermore, as shown in Utility Model Application No. 58-21377, there is an elastic cap in which a peripheral wall is tapered downward and inward from the outer periphery of the top wall, and an outward flange is attached to the lower end of the peripheral wall. .

``Problem to be solved by the invention'' When the above-mentioned conventional hemispherical elastic cap is pressed down on the center push-down part of the top as shown in Fig. 2b, only the top wall part is marked with a two-dot chain line. As shown in the figure, it may elastically invert downwards and then not return to its elastic state.Also, even if it does not elastically invert, only the central part of the top curves backwards downwards, so it takes time for the elastic return to take place. There is a disadvantage that there is a large amount of wasted space in the pressurizing chamber C that does not take part in the pressurizing chamber's functions, such as those shown in A and B, resulting in a decrease in pressurizing efficiency. In addition, in an elastic cap whose circumferential wall part is tapered downwardly and inwardly from the outer periphery of the top wall part, the inner diameter of the upper end of the cap circumferential wall part is larger than the inner diameter of the lower end opening of the cap circumferential wall part, that is, the innermost part of the cap has an opening. Since the inner diameter is larger than that of the elastic cap, it is difficult to mold the elastic cap integrally with an elastic member, and the structure of the mold for molding the cap becomes complicated and expensive. .

The present invention eliminates the above-mentioned drawbacks by making the pressing down part of the top of the hemispherical elastic cap a thick, rigid part.

"Means for Solving the Problems" In the hemispherical elastic cap 5, which constitutes the pressurizing chamber C of the manual pump device P and whose maximum internal diameter is at the lower end of the peripheral wall, the push-down portion 26 at the top of the cap
was formed in a thick rigid part.

"Operation" As shown in FIG. 2a, when the push-down part 26 formed at the top of the elastic cap 5 having the proposed structure is pushed down, the push-down part 26 is formed as a thick rigid part, so that the push-down part 26 is pressed down. Unlike the conventional example shown in FIG. Therefore, the curved portion formed between the lowered portion due to depression and the raised portion of the cap peripheral wall is moved outward from the center of the top compared to the case of FIG. 2b.

``Embodiment'' For convenience, the embodiment of the present invention will be described by taking as an example a case where it is applied to a cream-like substance storage container. In the figure, 1 is a container body having a bag-like body 2, 3 is a head attached to the upper end of the container body 1, and 4 and 5 are valve mechanisms installed inside the head 3 and forming a manual pump device P. , an elastic cap, and 6 a plug member for sealing the spout provided on the front side of the head 3, which are molded and manufactured from a synthetic resin material.

The container body 1 has a step-shaped neck part 7 made of a thick rigid body at the upper part, a thread 8 is provided around the outer periphery of the mouth neck part 7, and a medium diameter part 9 immediately below the thread 8. An engaging protrusion 10 is provided around the upper edge of the mouth, and a plate-shaped valve mechanism seat 11 that intersects with the inside of the mouth and neck part 7 is attached.

The head 3 has a cylindrical shape, and has a threaded groove 12 on its lower inner periphery that is threadedly engaged with the thread 8, so that it is threadedly attached to the mouth neck 7 of the container body 1, and the inner periphery of its upper end is provided with a threaded groove 12 that engages with the thread 8. An inward flange 13 for fixing the cap 5 is provided,
A spout 14, which is sealed by the plug member 6, is provided at the upper part of the front side.

The valve mechanism 4 constitutes a suction valve A and a discharge valve B, and the elastic cap 5 constitutes a pressurizing chamber C, both of which communicate from the inside of the body 2 to the spout 14 of the head 3 within the head 3. It constitutes a pump device P.

The valve mechanism 4 includes a dish-shaped lower substrate 15 that is fitted into the top of the mouth of the mouth and neck section 7 and fixed within the head 3, and a cylindrical valve seat 16 that opens into the body 2 on the rear side of the lower substrate 15. stand up, and place the frame 17 on the lower substrate 15.
and a plate body 18 are arranged, and the frame body 17 is fitted to the peripheral wall 3a of the head 3, and the plate body 18 has a cylindrical valve seat of the lower base plate 15 on the rear side. A through hole 20 is provided corresponding to the cylindrical valve seat 16, and another cylindrical valve seat 21 that opens upward on the front side and has a length approximately half that of the cylindrical valve seat 16 is provided vertically. 15 and the upper substrate 19 support a base 23 of a valve body 22 made of soft synthetic resin or rubber, and this base 23 has two small cylinders arranged side by side to support the cylindrical valve seat 1.
The cylindrical valve seats 16 and 21 are fitted onto the outer peripheries of the valve seats 6 and 21, respectively.
Valve portions 24 and 25 formed in a plate-like cantilevered manner on the end surface of
are seated, respectively, and the space between the lower substrate 15 and the upper substrate 19 is used as a discharge path and communicated with the spout 14.

The elastic cap 5 is made of soft synthetic resin or rubber and has a hemispherical shape, and has a push-down part 26 at the top formed as a thick rigid part, and a flange 27 on the periphery that is attached to the upper substrate 19 of the valve mechanism 4. It is airtightly clamped and fixed between the peripheral edge and the inward flange 13 of the head 3, and the internal space is defined as a pressurizing chamber C. The rigid portion 26 is formed in a size that can pressurize the entire inside of the pressurizing chamber C when pressed down.

The plug member 6 has a knob piece 28 in a part thereof, and is removably fitted into the spout 14 of the head 3. In addition, 29 is a head cover, which engages the engagement protrusion 30 at the lower end of the inner circumference with the engagement protrusion 10 to close the container body 1.
It is detachably attached to the mouth and neck part 7 of the body.

The above-mentioned container is used by storing a cream-like substance in the body 2, but when dispensing the contents, the head cover 29 is removed, the stopper member 6 is opened and removed, and the top of the elastic cap 5 is opened. The cap 5 is deformed and restored by pressing down and releasing it. Then, the volume of the pressurized chamber C changes, the suction valve A and the discharge valve B open and close, the pump device P works, and the contents inside the body 2 are poured out from the spout 14 by the pump device P. It can be done. When the contents of the body 2 decrease, the body 2 shrinks and deforms by that amount.

``Effects of the Idea'' Since the present invention has a hemispherical shape, it is easy to integrally mold it, and since the top pressing part 26 of the elastic cap 5 is a thick rigid part, when the top part is pressed down, as shown in FIG. 2a, The entire pressurizing chamber C can be effectively pressurized, and as shown in Figure b, there is no thick rigid part, and only the push-down part is elastically deformed into an inverted arc shape, similar to that of a conventional elastic cap. Furthermore, since there is no wasted space in the pressurizing chamber C that is not involved in the pressurizing action, such as in A and B, the performance, that is, the pump function, can be greatly improved. Moreover, since the push-down part 26 is like a wide single plate, when it is lowered and elastically returned, the outer peripheral part of the top part is elastically curved, and the entire push-down part is kept standing upright in an annular shape. simultaneously descends and returns elastically,
Therefore, the operation is much faster than in the past, and therefore the fluid discharging function of the pump device provided with the cap can be significantly improved.

Structurally, the top pressing portion 26 of the elastic cap 5
It is easy to simply make it a thick rigid part.

[Brief explanation of drawings]

Fig. 1 is a vertically sectional side view of the main part of a cream storage container using the elastic cap of the pump device of the present invention, and Fig. 2 a and b are diagrams for comparing the effects of the elastic cap of the present invention and the conventional elastic cap. Each is a longitudinal sectional view. 1... Container body, 3... Head, 4... Valve mechanism,
5...Elastic cap, 26...Thick push-down part.

Claims (1)

[Scope of utility model registration request] In the hemispherical elastic cap 5, which constitutes the pressurizing chamber C of the manual pump device P and whose maximum internal diameter is at the lower end of the peripheral wall, there is a push-down portion 26 at the top of the cap.
is formed in a thick rigid part,
Elastic cap for pumping equipment.