JPS5820634B2 - Kokiyuyou mask - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a respiratory mask, and particularly to a respiratory mask that is easy to handle.

It is well known that masks used for breathing or anesthesia have a face-contact frame inflated with air or the like.

By filling with air or the like, elasticity is imparted to the face-contact frame, so that the desired face-adherence can be achieved.

This type of breathing or anesthesia mask has this face frame,
It consists of a dome-shaped central member equipped with an inhalation pipe, but since the face frame bulges out and the inhalation pipe protrudes in the opposite direction, the structure as a whole does not become bulky. It required a large space to store multiple masks.

In addition, the inflated face-contact frame of this type of well-known mask is produced by injection molding or film wrapping, which makes it relatively expensive.

These methods require special means (adhesion or welding) to join the peripheral edges of the molded products in order to isolate the internal space from the outside world.

For this reason, a special sealing means had to be prepared (Japanese Patent Publication No. 70020/1986), which leaves air inside after the mask frame is inflated, and this means reduces the cost of the entire mask. This results in a higher value.

A further disadvantage is that masks are not always available for use.

This is because a device must be used that first inflates and closes the mask frame.

Masks have been disclosed that do not require expansion of the frame by filling it with a filler, for example water, which renders the frame taut or elastic (see British Patent No. 84,0638).
, this frame cannot avoid the aforementioned drawbacks in manufacturing technology.

This simply means that the closure means are omitted.

Finally, non-inflatable frames have already been produced as respiratory masks by vulcanization of natural rubber, but they are relatively expensive.

The present invention has been made in view of these points, and can be produced at substantially lower cost than conventionally known products of this kind, and can be disposable, so that it can be used immediately at all times. The purpose of the present invention is to provide this type of mask with a structure that allows a large number of masks to be stored in a small space.

In order to achieve this object, in the present invention, the face-contact frame is manufactured by plastic blow molding, and the central member has a dome-shaped single wall structure made of elastically deformable plastic, and the base of the air intake pipe of the central member is By providing a thin annular area around the periphery and giving the central member appropriate hardness and elasticity, the central member has a dome-shaped structure that protrudes from the face-contact frame and a central space surrounded by the face-contact frame. The bowl-shaped structure is pressed into two mechanically stable positions.

Such a face-contact frame can be obtained inexpensively by the well-known hollow plastic body blowing technique.

If molding means are employed, several frames may be molded in one blowing process.

Such means are described, for example, in Swiss Patent No. 442,710
Disclosed in the issue.

When producing plastic mask frames by a blowing process, for example, polyethylene or polyvinyl chloride is used.

Since the manufacturing cost of the mask of the present invention is low, it is economically suitable for disposable use.

There is a demand for such masks in hospitals, particularly for use in anesthesia.

However, in the case of anesthesia masks, it is generally desired that the face-contact frame be removably attached to a central member made of hardened plastic, and that the face-contact frame can be replaced.

In order to achieve this purpose, for example, an engaging groove may be provided on the central member or the face contact frame, thereby allowing the parts to be attached to and removed from each other.

If such a mask is used, the face-contact frame is discarded and only the central member is disinfected.

The most distinctive feature of the mask of the present invention is that it is formed so as to reduce the space in which it is housed.

When the mask is in use, the central member protrudes from the face frame in a dome shape like a well-known mask, but when not in use, the central member is pushed into the space surrounded by the face frame. This results in a flat overall shape, which saves storage space.

However, the present invention does not simply mean that the center member is made of elastically deformable plastic so that the center member can be pressed into the center member.

This is because when this type of mask is in use, its central member must be strong enough to withstand the force that presses it in the direction of the face.

Therefore, in the present invention, the central member has enough hardness to resist the above-mentioned pressing force, and by forming a thin-walled annular region around the base of the air suction pipe, a force greater than the above-mentioned pressing force during use is formed. By adding this, the central member can be easily pressed into the face frame.

However, it should be noted that the face frame, which is normally filled with air that has an internal pressure slightly higher than the external pressure, may tear or break if pressure is applied from the outside during storage. Karapolar (air passes through, albeit slightly, so the air gradually escapes).

The present invention is also effective in preventing this.

That is, when the air suction tube is inserted into the central member of the facial frame, the air suction tube is positioned so as to pass through the ring of the facial frame. If the parts are formed so as to slightly protrude on both sides beyond the face-contact frame, the stacked masks will abut each other at both ends of the air intake tube, and this will allow the external force to be applied to the upper part of the frame or Even if it acts from below, the frame will not be directly subjected to extreme external force.

In other words, external forces are avoided by both ends of the air suction pipe and do not directly act on the frame.

In order to secure the ribbon or cord for attaching the mask to the mask in a simple and inexpensive manner, a locking member may be provided to be pulled in and fastened at the desired position.

For this purpose, the locking member has a pair of protrusions spaced apart from each other by a certain distance, into which a ribbon or cord is inserted and fixed by its own elasticity.

Hereinafter, the present invention will be described based on preferred embodiments shown in the accompanying drawings.

In each of the drawings, a respiratory mask is shown with a face-contact frame 1 formed by blow molding of synthetic resin, which frame 1 has an internal space filled with air and tightly and permanently sealed off from the outside. It has 2.

The frame 1 can also be firmly glued to the central part 3 of the mask, for example.

However, it is also possible to make the central member 3 removable from the facial contact frame 1.

In use, the central member 3 of the mask is generally formed in the shape of a protruding dome and has an air intake tube 4 projecting outwardly from the central part of the mask.

As a result, a large storage space is required to hold the mask.

In order to reduce the space required for storing the mask when not in use, as shown in the embodiments of FIGS. A thin annular region 5 is provided around the base so that the central member 3 and air suction pipe 4 can be pressed into the face frame as shown in FIG.

This reduction in wall thickness in the annular region 5 creates a flexible zone which, despite the relatively rigid structure of the other parts, presses on the air intake tube 4 and recesses the central part 3 into the face frame. becomes possible.

As shown in FIG. 2, even after the inhalation tube 4 is inserted into the mask, both ends thereof protrude in the vertical direction beyond the facial contact frame 1.

This protects the face-contact frame 1 even if a compressive action is applied to the mask from above or below.

On one side (at the bottom in FIG. 2), the annular area 5 of the protruding wall section also provides support for the pressing force applied to the mask.

The range and thickness of the annular region 5 are designed so that both ends of the suction pipe 40 can be pushed in correctly by compression.

FIG. 3 is a cross-sectional view taken along the line ■-■ in FIG. This shows that the central member 30 is formed thicker than the other central member 30 parts.

In the mask shown in FIG.

A T-shaped locking member 6 made of plastic is provided on the outer surface, that is, the T-shaped locking member (see the enlarged view of the main part in FIG. 4) is provided on the central member 3 so as to be spaced apart from the surface thereof.

The cord 7 for attaching to the head is attached to the flaps 6' and 6'.
and the surface of the central member 3 of the mask, and can be pulled in and locked at a desired position.

In this way, the cord 7 can be locked at any position, making it possible to freely adjust the position of the cord in response to individual conditions and respond to various conditions. Become.

The reason for the T-shaped formation is that the ends of the cords 7 are supported and fixed thereby and do not have any adverse effect on the surface of the central portion of the mask.

Of course, the locking mechanism may also be of other types, for example the locking action may be effected by the built-in elasticity of the flap of the locking member.

Preferred embodiments of the present invention are listed below.

(A) The respiratory mask according to claim 1, wherein the face-contact frame is removable from the central member.

(B) A patent in which, when the central member is pushed into the face frame for storage, both ends of the air suction tube protrude beyond the face frame so as to protect the face frame. A respiratory mask according to the claims.

(Q) The respiratory mask according to any one of the claims, the embodiments described above, and (B), which also includes a member for locking a ribbon for holding the mask on the human head.

(D) The respiratory mask according to embodiment Q above, wherein the locking member is formed in the central member of the mask.

(Eye) The respiratory mask described in Embodiment Q or (Mouth) above, wherein the locking member is a T-shaped member integrally formed with the central portion.

[Brief explanation of drawings]

Fig. 1 is a perspective view of one embodiment of the mask of the present invention, Fig. 2 is a side view showing the state in which the center member of the respiratory mask of Fig. 1 is pressed in, and Fig. 3 is a - FIG. 4 is a sectional view taken along the line (2), and is a perspective view of the mask being locked by the cord, with a portion showing an enlarged sectional view of the locking member. 1.---Face-contact frame, 2.--Internal space, total.
...Central member, 4...Air suction pipe, 5...
... Annular area, 6 ... Locking member, 7 ...
··code.

Claims (1)

[Scope of Claims] 1. Consisting of a central member having one air suction pipe 4 approximately in its center, and an elastically deformable plastic blow-molded hollow face frame 1 provided around the central member; The member has a dome-shaped single-walled structure made of elastically deformable plastic, and has at least one thin-walled annular region 5 around the base of the air intake pipe 40 in proximity to the air intake pipe 4; The center member can take two dynamically stable positions: a dome-shaped structure protruding from the face-contact frame 1, and a bowl-shaped structure surrounded by the face-contact frame 1 and pressed into the central space. A respiratory mask characterized by hardness and elasticity.