JPH018556Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a device for removing residual gas from an aerosol container. More specifically, the present invention relates to a residual gas venting device for an aerosol container that allows a pressurizing needle to be easily and reliably attached to the bottom plate of the aerosol container.

[Prior Art] Aerosol containers conventionally used for cosmetics, pesticides, medicines, etc. have adopted a double aerosol container in which the inner space is filled with the contents and the outer space is filled with pressurized gas. ing. This is different from a container in which the contents and pressurized gas are filled together in a single container, and the pressurized gas remains even after the contents are consumed. Therefore, when disposing of the can after use, it is necessary to make a hole in the outer can wall to extract the residual gas.

As a device for extracting such residual gas, for example, a thin-walled portion is formed on the bottom plate of the outer container, and a holding piece is attached to the bottom plate so that a pressure needle for penetrating the thin-walled portion faces the thin-walled portion. Those that have been retained are known (for example, Japanese Utility Model Publication No. 51-22336 filed by the present applicant).

Such a holder is attached to the bottom plate by bonding, fusing, caulking, or the like, and the processing needle is inserted from the outside of the holder.

On the other hand, a method is also known in which a so-called hook-shaped holder is fitted onto the outer periphery of the bottom, and the pressure needle is held by the holder in a state where it faces the thin part of the bottom.

[Problems to be solved by the invention] The above-mentioned methods such as gluing, fusing, or caulking require adhesives, heaters, or tools when attaching the holder to the bottom plate of the container, so the work is complicated, and the work is complicated. There is a problem that the holder easily falls off. Furthermore, since the pressure needle itself is inserted or screwed into the holder from the outside, there is a problem in that it easily falls off.

On the other hand, those using the above-mentioned hook-shaped holder,
Although the installation work is simple, there are problems in that various holders must be manufactured depending on the size of the aerosol container, and the appearance is unfavorable.

The present invention was made in order to solve the problems of the conventional device, and it is possible to extremely easily and reliably connect the aerosol container, the pressurizing needle, and the holder, which are manufactured in separate processes. It is an object of the present invention to provide a residual gas venting device which can be used for aerosol containers of different sizes and which is also preferable in terms of appearance.

[Means for Solving the Problems] The device of the present invention is provided with a thin wall portion, an engaging protrusion projecting outward in the radial direction of the thin wall portion, and an outer wall recessed inwardly. a bottom plate of the container, a hollow push button made of synthetic resin that is fixed to the bottom plate so as to cover the thin wall portion and is deformable at least in a direction substantially perpendicular to the bottom plate; and a needle tip of the push button on the thin wall portion. a pressure needle housed in the push button so as to face the push button; and a removable stopper for preventing deformation of the push button; It is characterized by being locked to each other using .

[Function] In the device of the present invention, an engaging protrusion is formed in advance on the aerosol container side, and a peripheral wall that can elastically engage with the engaging protrusion is provided on the holder side that holds the pressure needle. Therefore, the coupling action between the two does not require any tools or other devices, and can be carried out very easily and reliably by simply fitting the peripheral wall of the holder elastically into the engagement protrusion. Furthermore, since the pressure needle is housed within the push button, there is no risk of it falling off.

Moreover, the shape of the engaging protrusion formed on the bottom plate of the aerosol container can be selected regardless of the size of the aerosol container, so as long as the shape of the engaging protrusion is unified, it can be applied to aerosol containers of any size and shape. The same holder can also be attached to the

In addition, it is not installed in a part that is visible from the outside of the aerosol container like a hook-shaped holder, but in the recessed bottom where it is almost invisible, so the appearance is not compromised and the container can be kept upright on its bottom edge. .

[Example] Next, the residual gas venting device of the present invention will be explained with reference to the drawings.

Fig. 1 is a longitudinal sectional view showing an embodiment of the residual gas removal device of the present invention, Fig. 2 is a partially cutaway perspective view of the embodiment shown in Fig. 1, and Figs. A vertical sectional view showing different embodiments of the residual gas venting device of the invention, FIG. 5 is a perspective view showing the state before the push button is attached to the bottom plate in the embodiment of FIG. 4, and FIG. FIG. 7 is a longitudinal sectional view showing another embodiment of the extraction device.

In Figs. 1 and 2, reference numeral 1 denotes the outer container of the aerosol container, and the bottom plate 2 of the outer container 1 is recessed inward. A thin wall portion 3 is formed approximately in the center of the bottom plate 2, and an engaging protrusion 5 protruding from a thick wall portion 4 on the outside of the thin wall portion 3 is formed integrally with the bottom plate 2. There is. In this embodiment, the engagement protrusion 5 is formed into an annular shape, and its lower end 5a is slightly bent radially outward. Engagement protrusion 5
A peripheral wall 7 of a hollow push button 6 made of synthetic resin is fitted onto the outer periphery of the button. The upper end 7a of the peripheral wall 7 projects inward in the radial direction, and is locked to the lower end 5a of the engagement protrusion 5 using elasticity. A needle holder 8 in the shape of a cylinder with a bottom is provided below the push button 6, and a pressure pin 9 in the form of a push pin is held within the needle holder 8 such that the needle tip 10 faces the thin wall portion 3 side. Both the peripheral wall 7 and the needle holding part 8 have relatively high rigidity, have different outer diameters, and have a flexible thin piece 11 extending in the radial direction.
Continuous through. This allows the thin piece 11 to be deformed and the push button 6 to be pushed in easily. A removable stopper 12 is inserted between the peripheral wall 7 and the needle holder 8.

Next, a method of using the residual gas venting device constructed as described above will be explained. When all the contents of the aerosol container are used and the aerosol container is discarded, the stopper 12 is first pulled out, and then the push button 6 is strongly pressed. As a result, the thin wall portion 3 is pierced by the pressurizing needle 9, and residual gas is ejected from the pierced hole. When an aerosol container is used, the stopper 12 prevents the push button 6 from deforming, so even if the push button 6 is pressed inadvertently, the thin wall portion 3 will not be perforated.

The shapes and locking structures of the engaging protrusion 5 and the peripheral wall 7 in the present invention are not limited to those shown in FIGS. structure can be adopted.

In the embodiment shown in FIG. 3, a substantially cylindrical engagement protrusion 51 projects from the bottom plate 2, and a lower end 51a of the engagement protrusion is bent inward.
The peripheral wall 7 of the push button 6 is formed into an annular shape, and its upper end 7a projects outward in the radial direction. The peripheral wall 7 having such a shape is fitted onto the inner periphery of the engagement protrusion 51, and is locked by the engagement between the lower end 51a and the upper end 7a so that the peripheral wall 7 and the engagement protrusion 51 will not easily come off. .

In the embodiment shown in FIGS. 4 and 5, two engaging protrusions 52 whose tip portions 52a are bent inward protrude from the bottom plate 2, and the upper end of the peripheral wall 7 is provided with the engaging protrusions 52. A flange piece 72 having a notch 71 that engages with the tip 52a of the flange 52 projects outward in the radial direction. As shown in FIG. 4, the engaging protrusion 52 and the peripheral wall 7 formed in this manner are securely engaged with the notch 71 and the tip 52a by utilizing the elasticity of the engaging protrusion.

In the embodiment shown in FIG.
Two engaging protrusions 53 formed by bending 3a outward
and the peripheral wall 7 are connected to a hole 74 formed in a flange piece 73 provided at the upper end of the peripheral wall 7 and the engaging protrusion 5.
It is locked by the engagement of the tip part 53a of No.3.

Note that the engaging projections 52 shown in FIGS. 4 to 6,
The number of engagement protrusions 53 is not limited to two, and may be formed by arranging three or more engagement protrusions in a ring shape, for example. In that case, the flange pieces 72, 7
3 is also the same number as the engaging protrusions 52 and 53.

In addition, the pushbutton 6 in the above embodiments is configured such that the peripheral wall 7 and the needle holding portion 8 having different outer diameters are continuous with each other via the thin piece 11, but the pushbutton in the present invention has such a shape. However, any conventionally known hollow pushbutton that can be deformed in the axial direction may be used, such as a bellows type pushbutton or a cylindrical pushbutton having a thin outer circumferential wall. Further, the stopper 12 may be any conventionally known stopper, such as a block-shaped stopper interposed between the bottom plate and the pressure needle, as long as it can prevent the push button from being deformed by pressing in the axial direction.

The thin wall portion 3 and the engaging protrusions 5, 51, 52, 53 of the bottom plate 2 according to the present invention can be formed simultaneously when the outer container 1 is subjected to impact extrusion processing, for example. Further, the push button 6 made of synthetic resin can be easily deformed from polyethylene, polypropylene, nylon, etc. by a method such as injection molding.

[Effects of the invention] The residual gas venting device of the present invention replaces the external container 1 and the push button 6, which are formed separately as described above, by utilizing the elasticity of the push button 6 or the engagement protrusion made of synthetic resin. Since it is firmly fixed, there is no need to use adhesives, no need for heating, and no post-processing such as caulking required. Therefore, the fixing work is extremely simple.

Moreover, in the present invention, since the pressure needle is housed within the hollow push button, there is no risk of it falling off.

Furthermore, the residual gas venting device of the present invention has an outer container 1.
Since the outer periphery of the container is not used, the same container can be used for aerosol containers of various sizes. Moreover, it has the advantage of being less noticeable from the outside than the conventional hook-shaped holder, and is therefore more pleasing in terms of appearance.

The above are the effects based on the essential configuration of the present invention, but even better effects can be achieved if the following additional configurations are adopted in the apparatus of the present invention.

First, when forming the inner periphery of the peripheral wall 7 to be larger than the outer periphery of the needle holder 8, the stroke of the pressure pin 9 is increased because the needle holder 8 fits into the peripheral wall 7 when pressing the push button 6. The advantage is that it can be done.

In addition, when forming a slit (12a in FIGS. 1 and 2) that can lock the base of the pressure pin 9 (9a in FIG. 1) on the tip side of the stopper 12, the pressure pin 9 can be directly locked. Therefore, inadvertent drilling of holes in the bottom plate 2 can be more reliably prevented.

Furthermore, when inserting the stopper 12 in a direction perpendicular to the central axis of the push button 6, the hole after the stopper 12 is removed (13 in Figure 2) becomes a vent hole for residual gas, so a separate vent hole is prepared. No need to form. Moreover, since the residual gas ejected from the holes 13 is blocked by the recessed bottom plate 2, there is an advantage that the user does not feel uncomfortable.

As mentioned above, the residual gas venting device for an aerosol container of the present invention allows the push button to be easily and securely attached to the bottom plate, and has excellent versatility and appearance, so its practical value is extremely large.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional view showing an embodiment of the residual gas removal device of the present invention, Fig. 2 is a partially cutaway perspective view of the embodiment shown in Fig. 1, and Figs. Fig. 5 is a perspective view showing the push button in the embodiment of Fig. 4 before it is attached to the bottom plate; Fig. 6 is a longitudinal sectional view showing different embodiments of the residual gas venting device of the invention; FIG. 7 is a longitudinal sectional view showing another embodiment of the extraction device. Main symbols in the drawing: 1: Outer container, 2: Bottom plate,
3: Thin part, 4: Thick part, 5, 51, 52, 5
3: Engagement protrusion, 6: Push button, 7: Peripheral wall, 8: Needle holding portion, 9: Pressure pin, 12: Stopper.

Claims (1)

[Claims for Utility Model Registration] 1. A bottom plate of an outer container in which a thin wall portion is formed and an engagement protrusion that projects radially outward from the thin wall portion is integrally formed and is recessed inward;
a hollow push button made of synthetic resin that is fixed to the bottom plate so as to cover the thin wall portion and is deformable at least in a direction substantially perpendicular to the bottom plate; The press button has a pressure needle housed in the push button, and a removable stopper for preventing deformation of the push button, and the peripheral wall of the push button and the engaging protrusion are moved against each other using elasticity. A residual gas venting device for a double aerosol container, characterized in that the device is secured to a double aerosol container. 2. The push button has a peripheral wall and a needle holding part,
Utility model registration claim 1, wherein the peripheral wall and the needle holding portion are each formed into a cylindrical shape with different diameters and a relatively rigid shape, and both are continuous via a thin piece extending in the radial direction.
Apparatus described in section. 3. A hole is formed between the peripheral wall and the needle holding portion in a direction perpendicular to the central axis, and a stopper that engages with the pressurizing needle is inserted into the hole. 2. The device according to item 2 or item 2.