JP7557869B2 - Diffusion prevention hood - Google Patents

Description

The present invention relates to a diffusion prevention hood.

Booths for isolating infectious disease patients or those suspected of having an infectious disease are known. For example, Patent Document 1 discloses technology for a ventilation booth that covers the upper body of an infectious disease patient lying in bed, with the aim of preventing in-hospital infections caused by airborne substances such as viruses released by the infectious disease patient.

JP 2014-13142 A

The ventilation booths described above are generally large in size because they are designed to cover the beds on which patients with infectious diseases or those suspected of having infectious diseases (hereafter referred to as "subjects") lie. Furthermore, such devices must be disinfected after the examination or treatment of the subject is completed. However, it is not possible to completely remove airborne particles released from the subject, and there is a risk that the airborne particles will spread. For this reason, there has been a demand for a small, disposable device that does not require disinfection after use.

The present invention was made in consideration of the above problems, and aims to provide a small, disposable diffusion prevention hood.

In order to achieve the above object, the diffusion prevention hood of the present invention comprises:
A diffusion prevention hood that covers the head of a subject and includes a hood having six peripheral walls and a fan filter unit that draws in air within the hood,
The hood is
A first opening surface that connects from a peripheral wall of the top surface to a peripheral wall on the top side of the subject's head;
At least one second opening surface provided on a peripheral wall on the parietal side of the subject;
A third opening surface provided in the peripheral wall on the torso side of the subject for passing the neck or shoulder of the subject;
At least one or more fourth opening surfaces provided on either the left or right or torso side of the subject;
At least one or more fifth opening surfaces having a door, the fifth opening surface being an opening surface provided in a peripheral wall on either the left or right side or the torso side of the subject;
Equipped with
a film is attached to the hood to cover the first opening surface, the second opening surface, and the fourth opening surface;
a film that closes the second opening surface and the fourth opening surface is made of a soft resin material;
The film that closes the second opening surface and the fourth opening surface is provided with perforations,
The peripheral wall of the bottom surface has at least one protruding portion,
At least one of the left and right peripheral walls and the peripheral wall on the top side of the subject has a slit into which the protruding portion is inserted when the hood is placed on the subject,
The height of the hood is in the range of 300 mm to 800 mm;
The distance of the hood from the top of the head to the torso of the subject is in the range of 200 mm to 500 mm.

In addition, in the above-mentioned diffusion prevention hood,
A stopper film is attached to the hood to prevent the door from entering the hood,
The hood is provided with a cutout portion for facilitating opening and closing of the door,
The stopper film has a size sufficient to cover the notch when the door is closed.

In addition, in the above-mentioned diffusion prevention hood,
A film that covers the fifth opening surface is attached to the hood,
The hood is provided with a cutout portion for facilitating opening and closing of the door,
The film closing the fifth opening surface is characterized in that it has perforations.

In addition, in the above-mentioned diffusion prevention hood,
The film that closes the second opening surface and the fourth opening surface is attached from the inside of the hood.

In addition, in the above-mentioned diffusion prevention hood,
the bottom peripheral wall has a first protrusion that is inserted into a slit in the peripheral wall on the right side of the subject when the hood is placed on the subject, and a second protrusion that is inserted into a slit in the peripheral wall on the left side of the subject,
the peripheral wall on the right side of the subject has a slit into which the first protrusion is inserted,
the peripheral wall on the left side of the subject has a slit into which the second protrusion is inserted,
The peripheral wall on the top side of the subject's head has slits into which the first protrusion and the second protrusion are inserted when the hood is folded.

In addition, in the above-mentioned diffusion prevention hood,
the bottom peripheral wall has a third protrusion that is inserted into a slit in the peripheral wall on the top side of the subject's head when the hood is placed on the subject, and a fourth protrusion that is inserted into a slit in one of the left and right peripheral walls of the subject,
a peripheral wall on the parietal side of the subject's head has a slit into which the fourth protrusion is inserted,
One of the left and right peripheral walls of the subject has a slit into which the fourth protrusion is inserted.

In addition, in the above-mentioned diffusion prevention hood,
The left and right peripheral walls of the subject have zipper portions formed by perforating the left and right peripheral walls,
The hood is divided by separating the zipper portion.

In addition, in the above-mentioned diffusion prevention hood,
The hood is formed from cardboard, and the peripheral wall on the top of the subject's head, the peripheral wall on the torso side, and the peripheral walls on the left and right sides of the subject are characterized in that the grain of the cardboard is positioned vertically when the hood is placed on the subject.

In addition, in the above-mentioned diffusion prevention hood,
The hood is characterized in that a film for covering the third opening surface is attached to the hood.

The present invention provides a small, disposable diffusion prevention hood.

1 is a diagram showing a state in which a diffusion prevention hood according to the first embodiment is placed on a subject. FIG. FIG. 2 is a front view of the diffusion prevention hood according to the first embodiment. FIG. 2 is a rear view of the diffusion prevention hood according to the first embodiment. FIG. 2 is a right side view of the diffusion prevention hood according to the first embodiment. FIG. 2 is a left side view of the diffusion prevention hood according to the first embodiment. FIG. 2 is a plan view of the diffusion prevention hood according to the first embodiment. 1 is a diagram showing a state before a diffusion prevention hood according to embodiment 1 is placed on a subject. FIG. 13 is a diagram showing a state in which a diffusion prevention hood according to the second embodiment is placed on a subject. FIG. FIG. 11 is a front view of a diffusion prevention hood according to a second embodiment. FIG. 11 is a rear view of the diffusion prevention hood according to the second embodiment. FIG. 11 is a right side view of the diffusion prevention hood according to the second embodiment. FIG. 11 is a left side view of the diffusion prevention hood according to the second embodiment. FIG. 11 is a plan view of a diffusion prevention hood according to a second embodiment. 13 is a diagram showing a state before a diffusion prevention hood according to embodiment 2 is placed on a subject. FIG. FIG. 11 is a rear view of a diffusion prevention hood according to a modified example.

(Embodiment 1)
As shown in FIG. 1, the diffusion prevention hood 1 according to this embodiment includes a fan filter unit 2 and a hood 3. FIG. 1 shows the diffusion prevention hood 1 placed on the head of a subject 4. FIG. 2 shows the diffusion prevention hood 1 as viewed from the top of the subject 4, and will be referred to as a front view hereinafter. FIG. 3 shows the diffusion prevention hood 1 as viewed from the torso of the subject 4, and will be referred to as a back view hereinafter. FIG. 4 and FIG. 5 show the diffusion prevention hood 1 as viewed from the side of the subject 4, and will be referred to as a right side view and a left side view hereinafter. FIG. 6 shows the diffusion prevention hood 1 as viewed from the top surface direction, and will be referred to as a plan view hereinafter. FIG. 7 shows the state before the diffusion prevention hood 1 is placed on the head of the subject 4. The diffusion prevention hood 1 according to the first embodiment will be described with reference to FIGS. 1 to 7. The fan filter unit 2 is omitted in FIGS. 2 to 7.

The fan filter unit 2 is a device equipped with a suction mechanism that can be attached to and detached from the hood 3. The fan filter unit 2 is composed of a filter section, a blower section, and a connection section. The filter section includes a filter molded from paper-making glass fiber, for example, and is attached inside the hood 3. The blower section includes a battery and a fan, and is attached outside the hood 3. The connection section is a member that connects the filter section and the blower section, and is attached outside the hood 3. The fan filter unit 2 sucks air from inside the hood 3 through the filter section, and blows out purified air from the blower section. After using the diffusion prevention hood 1, the connection section and blower section are removed from the hood 3, and the hood 3 is folded and discarded with the filter section still attached inside the hood 3.

The hood 3 has six peripheral walls: a top peripheral wall 3a, a front peripheral wall 3b (a peripheral wall on the top side of the subject 4's head), a back peripheral wall 3c (a peripheral wall on the torso side of the subject 4), a right side peripheral wall 3d (a peripheral wall on the right side of the subject 4), a left side peripheral wall 3e (a peripheral wall on the left side of the subject 4), and a bottom peripheral wall 3f.

The hood 3 is made of corrugated cardboard. The top peripheral wall 3a is connected to the front peripheral wall 3b by folding the corrugated cardboard or by adhesive, and the edges of the top peripheral wall 3a that contact the back peripheral wall 3c, the right peripheral wall 3d, and the left peripheral wall 3e are provided with folded sections that contact the respective peripheral walls. The front peripheral wall 3b, the right peripheral wall 3d, and the left peripheral wall 3e are connected to each other by folding the corrugated cardboard or by adhesive, and the back peripheral wall 3c, the right peripheral wall 3d, and the left peripheral wall 3e are connected to each other by folding the corrugated cardboard or by adhesive. The bottom peripheral wall 3f and the front peripheral wall 3b are connected to each other by folding the corrugated cardboard or by adhesive.

The hood 3 shown in Figures 1 and 7 is in an assembled state, and the hood 3 can be stored and carried in a folded state. The hood 3 that can accommodate the head of the subject 4 is completed by placing the bottom peripheral wall 3f on a bed or floor, standing up the right side peripheral wall 3d and the left side peripheral wall 3e, and inserting the top peripheral wall 3a like a lid, as shown in Figure 7. The hood 3 can then be placed over the head of the subject 4 by tilting it in the direction indicated by the arrow 11.

The width W1 of the hood 3 (Figure 2) is preferably set assuming that the diffusion prevention hood 1 will be used on a patient lying on a stretcher. Since the width of a stretcher is generally about 550 mm, it is preferable that the hood 3 be a size that can be placed on it. Therefore, the width W1 of the hood 3 is preferably in the range of 450 mm to 550 mm.

The depth D1 of the hood 3 (FIG. 4) is preferably set on the assumption that a doctor or the like will insert his/her hand from the openings 6a and 6b described below to treat a patient. According to the "AIST Human Body Dimension Database" (hereinafter referred to as the "Human Body Dimension Database") published by the National Institute of Advanced Industrial Science and Technology, the maximum distance from the elbow to the grip axis of a human body is 379 mm. Considering the variation in the distance inserted into the hood 3 and the size of the head of the subject 4, the depth D1 of the hood 3 is preferably 200 mm or more. Furthermore, if the depth of the hood 3 is too long, it will be difficult for a doctor or the like to treat the subject 4, so the depth D1 of the hood 3 is preferably 500 mm or less. Therefore, the depth D1 of the hood 3 is preferably in the range of 200 mm to 500 mm. Furthermore, assuming that about 80% of the distance from the elbow to the grip axis will be inserted, the depth D1 of the hood 3 is more preferably in the range of 300 mm to 400 mm.

The height H1 of the hood 3 (Figure 2) is preferably set assuming that a severely injured patient will be intubated. According to the human body size database, the maximum head height (distance from the back of the head to the bottom of the nose) when a person is lying down is 213 mm. The sum of this height and the height of a general laryngoscope is approximately 368 mm. Taking into consideration the variation in head height of the subject 4 and the fact that a small laryngoscope may be used, the height H1 of the hood 3 is preferably 300 mm or more. Furthermore, if the hood 3 is too high, it becomes difficult for a doctor or the like to look into it, so the height H1 of the hood 3 is preferably 800 mm or less. Therefore, the height H1 of the hood 3 is preferably in the range of 300 mm to 800 mm, and more preferably in the range of 450 mm to 550 mm.

In this embodiment, the hood 3 has a width W1 of 500 mm, a depth D1 of 350 mm, and a height H1 of 500 mm.

The hood 3 is formed so that the grain direction of the cardboard material of the front peripheral wall 3b, the back peripheral wall 3c, the right side peripheral wall 3d, and the left side peripheral wall 3e is vertical (z direction) when the hood 3 is placed over the head of the subject 4 as shown in FIG. 1. After using the diffusion prevention hood 1, the hood 3 is discarded with the filter part of the fan filter unit 2 still attached, and the thickness of the filter part makes it difficult to fold the hood 3. However, by arranging the grain direction of the cardboard material in the vertical direction in the above peripheral walls, it can be folded along the grain direction of the cardboard, making it easier to fold the hood 3.

As shown in Figs. 1, 2 and 6, the top peripheral wall 3a is provided with an opening surface 5 (first opening surface) that connects to the front peripheral wall 3b. A film is attached to the top peripheral wall 3a and the front peripheral wall 3b to cover the opening surface 5. Any transparent material can be used for the film to cover the opening surface 5. The opening surface 5 serves as a window for doctors and others to observe the condition of the subject 4. Since doctors and others are positioned on the front peripheral wall 3b side to observe and treat the subject 4, the opening surface 5 is provided not only on the top peripheral wall 3a but also connected to the front peripheral wall 3b, ensuring a wide field of view for doctors and others.

As shown in FIG. 2, the front peripheral wall 3b is provided with openings 6a and 6b (second openings). The openings 6a and 6b are for inserting the hands of the doctor or the like into the hood 3 to treat the subject 4. The center position of the openings 6a and 6b in the height direction (z direction in FIG. 1) is set taking into consideration the height of the head of the subject 4 in a lying position, the arm size of the doctor or the like, and workability. Taking these into consideration, it is preferable that the center position of the openings 6a and 6b in the height direction is in the range of 250 mm to 350 mm. In addition, the diameter of the openings 6a and 6b is set taking into consideration the size of the forearm of the doctor or the like. According to the human body size database, the maximum value of the maximum width of the forearm is 107 mm. Therefore, the diameter of the openings 6a and 6b is preferably in the range of 70 mm to 150 mm, and more preferably in the range of 100 mm to 150 mm.

In this embodiment, the height of the center of the opening surfaces 6a and 6b is set to 300 mm, and the diameter of the opening surfaces 6a and 6b is set to 120 mm.

A film is attached to the front peripheral wall 3b so as to close the openings 6a, 6b, and the film has perforations 6c, 6d extending vertically. Before a hand is inserted through the openings 6a, 6b, the openings 6a, 6b are closed by the film, ensuring safety before treatment. During treatment, a doctor or other person breaks the perforations 6c, 6d and inserts their hand through the openings 6a, 6b.

The length of the perforations 6c and 6d is set so that the film will wrap around the hand when the hand is inserted and so that gaps are minimized. According to the human body dimension database, the minimum maximum width of the forearm is 73 mm, so the length of the perforations is preferably in the range of 60 mm to 80 mm. In this embodiment, the length of the perforations 6c and 6d is set to 70 mm.

The film for sealing the openings 6a and 6b is made of a soft resin material. If a film that tears easily is used, there is a risk that the hole will widen too much when a hand is inserted, causing floating matter to diffuse through the widened hole. Therefore, it is necessary to use a film that does not tear easily. The film for sealing the openings 6a and 6b is, for example, a film made of low-density polyethylene or a film made of polyvinyl alcohol.

The film for blocking the openings 6a and 6b is attached from the inside of the hood 3. Because the fan filter unit 2 sucks in the air inside the hood 3, when the film is torn and a hand is inserted, the film clings to the hand. On the other hand, when a hand is removed from the hood 3, a force acts on the film toward the outside of the hood 3, but by attaching the film to the inside of the hood 3, it is possible to prevent the film from peeling off to the outside when the hand is removed. This makes it possible to prevent floating matter from diffusing from the hood 3.

As shown in Figure 2, the front peripheral wall 3b has slits 6e and 6f. The slits 6e and 6f are used when folding the hood 3 after using the diffusion prevention hood 1, and are for inserting the protrusions 10b (first protrusion) and 10c (second protrusion) on the bottom peripheral wall 3f. After use, the hood 3 is contaminated by airborne matter released from the subject 4, but by inserting the protrusions 10b and 10c into the slits 6e and 6f on the subject 4, the folded hood 3 can be prevented from opening.

As shown in Figs. 1 and 3, the rear peripheral wall 3c is provided with an opening surface 7a (third opening surface) for passing the neck of the subject 4. The opening surface 7a may be any shape, but a horseshoe (U-shape) is preferable. If the gap between the rear peripheral wall 3c and the neck becomes large when the subject 4 inserts his/her head, droplets will easily spread, so it is desirable to design the opening surface 7a to be small. Furthermore, the smaller the area of the opening surface 7a, the smaller the required air volume of the fan filter unit 2 can be.

According to the human body dimension database, the maximum value at the base of the neck is 167 mm, and the minimum value is 108 mm. Considering variation and the fact that it is intended for children, it is preferable that the width of the opening surface 7a is 100 mm or more. Furthermore, when calculating the height of the neck when a person is lying down (from the peripheral wall 3f of the bottom surface to the top of the neck) based on the human body dimension database, the minimum value is 91 mm. Considering variation and the fact that it is intended for children, it is preferable that the height of the opening surface 7a is 80 mm or more.

In this embodiment, the width W2 of the opening surface 7a of the hood 3 is set to 170 mm, and the height H2 of the opening surface 7a is set to 200 mm.

A film 7b is attached to the peripheral wall 3c on the rear side so as to close the opening surface 7a. A slit 7c is provided in the film 7b in the vertical direction. The film 7b reduces the gap that occurs in the neck when the subject 4's head enters the inside of the diffusion prevention hood 1, and serves to prevent droplets from diffusing from the opening surface 7a. By providing the film 7b, the air volume required for the fan filter unit 2 can also be reduced.

The area of the opening surface 7a in this embodiment is approximately 310 square cm, and if the film 7b is not attached, the gap when the neck is inserted is approximately 133 square cm. If the film 7b is not attached, the controlled air speed to prevent droplets from diffusing from the hood 3 is set to 0.2 m/s to 0.3 m/s, and the air volume required to achieve this air speed is 160 L/min to 240 L/min. In this embodiment, the air volume of the fan filter unit 2 is approximately 180 L/min.

In this way, the air volume of the fan filter unit 2 can be reduced by appropriately reducing the gap between the neck and the peripheral wall 3c on the back surface 7a. Also, by attaching the film 7b, the air volume of the fan filter unit 2 can be further reduced. And by reducing the air volume of the fan filter unit 2, the diffusion prevention hood 1 can be operated with a small battery and the operating noise can be reduced. Also, since the air speed around the neck can be kept above a certain level, the possibility of droplets getting out of the hood 3 can be greatly reduced.

In addition, a door 8a is provided on the rear peripheral wall 3c, as shown in Figs. 1 and 3. The door 8a is formed by a U-shaped notch cut into the rear peripheral wall 3c and a crease 8f. The opening surface 8d (fifth opening surface) that appears when the door 8a is opened is for inserting and removing treatment instruments, etc. As shown in Figs. 1 and 3, the door 8a preferably has a crease 8f on the top surface side so that it can be easily closed by its own weight.

The door 8a has an arc-shaped cutout 8b, and the rear peripheral wall 3c has an arc-shaped cutout 8c. The cutouts 8b and 8c combine to form a circular hole. By hooking a finger in this part, the door 8a can be opened and closed easily.

In addition, as shown in Figs. 1 and 7, a stopper film 8e is provided at the lower end of the opening surface 8d that appears when the door 8a is opened to prevent the door 8a from entering the hood 3. Any material can be used for the stopper film 8e as long as it has enough strength to prevent the door 8a from entering the hood 3. The stopper film 8e has a size that closes the hole formed by the cutout portion 8b and the cutout portion 8c when the door 8a is closed. This makes it possible to prevent air outside the hood 3 from leaking into the hood 3 through the cutout portion 8b and the cutout portion 8c. In addition, by providing the stopper film 8e on the opening surface 8d, the amount of air outside the hood 3 leaking into the hood 3 through the gap between the door 8a and the peripheral wall 3c on the back side can be reduced. This makes it possible to concentrate the air entering the hood 3 around the neck of the subject 4, and to provide the required controlled wind speed at the neck. Therefore, the ventilation efficiency of the fan filter unit 2 can be improved.

The right side peripheral wall 3d has an opening 9a (fourth opening) as shown in FIG. 4. The left side peripheral wall 3e has an opening 9b (fourth opening) as shown in FIG. 5. The openings 9a and 9b are for nurses to insert their hands into the hood 3 to treat the subject 4. The openings 9a and 9b also serve as windows for the nurse to observe the condition of the subject 4. A film is attached to the right side peripheral wall 3d and the left side peripheral wall 3e from the inside of the hood 3 so as to cover the openings 9a and 9b, and the film has horizontal perforations 9c and 9d. The material of the film and the length of the perforations 9c and 9d are the same as those of the film and perforations 6c and 6d that cover the openings 6a and 6b.

The right side peripheral wall 3d and the left side peripheral wall 3e are provided with marks 9e, 9f for forming holes for mounting the fan filter unit 2. When mounting the fan filter unit 2, holes are drilled along the marks 9e, 9f, the joints of the fan filter unit 2 are mounted in the holes, the filter section is attached to the joints from the inside of the hood 3, and the blower section is attached to the joints from the outside of the hood 3. Figure 1 shows the fan filter unit 2 mounted only to the left side peripheral wall 3e.

As shown in FIG. 7, the right side peripheral wall 3d and the left side peripheral wall 3e are provided with slits 9g and 9h for inserting the protruding parts 10b and 10c extending from the bottom peripheral wall 3f.

As shown in FIG. 7, the right side peripheral wall 3d and the left side peripheral wall 3e do not have folded-in portions on the bottom sides 9i and 9j that are folded inwardly of the hood 3 and come into surface contact with the bottom peripheral wall 3f. This makes it easier to assemble the hood 3 and also easier to fold the hood 3 when discarding it.

The bottom peripheral wall 3f is a peripheral wall that is placed under the subject 4. The bottom peripheral wall 3f is configured to be larger in size than the top peripheral wall 3a. Specifically, as shown in Figures 1 and 4 to 7, the bottom peripheral wall 3f extends toward the torso of the subject 4, and the length of the bottom peripheral wall 3f in the depth direction (x direction in Figure 1) is longer than the length of the top peripheral wall 3a in the depth direction. In addition, the length of the bottom peripheral wall 3f in the width direction (y direction in Figure 1) is longer than the length of the top peripheral wall 3a in the width direction.

The diffusion prevention hood 1 has a peripheral wall 3f on the bottom surface, which allows the subject 4's head and torso to be placed on the peripheral wall 3f to hold down the hood 3 and fix the hood 3 in place. Furthermore, the diffusion prevention hood 1 has a peripheral wall 3f on the bottom surface, which prevents the stretcher or bed on which the subject 4 is lying from becoming soiled. Note that the peripheral wall 3f on the bottom surface preferably extends beyond the shoulders in the direction of the subject 4's torso in order to fully exert the fixing effect.

The right side peripheral wall 3d and the left side peripheral wall 3e do not have a folded surface for contacting the bottom peripheral wall 3f, but by making the width of the bottom peripheral wall 3f larger than the width of the top peripheral wall 3a, it is possible to make it easier to mate the bottom peripheral wall 3f with the right side peripheral wall 3d and the left side peripheral wall 3e.

As shown in FIG. 7, a mark 10a is provided on the bottom peripheral wall 3f, which serves as a guide for aligning the bottom side edge 7d of the rear peripheral wall 3c when placing the hood 3 on the subject 4. By placing the hood 3 on the subject 4 so that the edge 7d of the rear peripheral wall 3c is aligned with the mark 10a, it is possible to prevent the hood 3 from hitting the subject 4's face and having to redo the position adjustment.

As shown in Figs. 4, 5 and 7, the bottom peripheral wall 3f has protrusions 10b and 10c on the sides 10d and 10e. The protrusions 10b and 10c are inserted into the slits 9g and 9h in the right peripheral wall 3d and the left peripheral wall 3e when the hood 3 is placed on the subject 4. By inserting the protrusions 10b and 10c into the slits 9g and 9h, the gap between the bottom peripheral wall 3f and the right peripheral wall 3d and the left peripheral wall 3e can be reduced. In addition, the protrusions 10b and 10c are not provided on the rear peripheral wall 3c side of the bottom peripheral wall 3f, but on the right peripheral wall 3d and the left peripheral wall 3e side, and are inserted into the slits 9g and 9h in the right peripheral wall 3d and the left peripheral wall 3e, not in the rear peripheral wall 3c, making the assembly process easier.

According to this embodiment, a small, disposable diffusion prevention hood that prevents the diffusion of airborne substances released from a subject can be provided. In addition, according to this embodiment, the hood 3 can be easily assembled by raising the right side peripheral wall 3d and the left side peripheral wall 3e and inserting the top peripheral wall 3a like a lid. In addition, the assembled hood 3 can be easily and accurately placed on the head of the subject 4 by simply tilting it down along the mark 10a. Furthermore, by inserting the protrusions 10b and 10c provided on the bottom peripheral wall 3f into the slits 9g and 9h of the right side peripheral wall 3d and the left side peripheral wall 3e, the bottom peripheral wall 3f can be fixed to the right side peripheral wall 3d and the left side peripheral wall 3e, and the gaps between the bottom peripheral wall 3f and the right side peripheral wall 3d and the left side peripheral wall 3e can be blocked.

In addition, according to this embodiment, the front peripheral wall 3b, the right peripheral wall 3d, and the left peripheral wall 3e are provided with openings 6a, 6b, 9a, and 9b, and by providing perforations on these openings, it is possible to easily access the inside of the hood 3. Also, by providing a door 8a on the rear peripheral wall 3c, it is possible to easily insert and remove instruments through the opening 8d. Furthermore, the hood 3 can be folded and disposed of after use. At this time, it can be disposed of more safely by folding the contaminated surface inward. And by making the hood 3 disposable, it is possible to avoid infection of medical personnel and contamination of the examination work area.

(Embodiment 2)
The diffusion prevention hood 1 according to this embodiment includes a fan filter unit 2 and a hood 3. The fan filter unit 2 is the same as that in the first embodiment. The fan filter unit 2 is omitted in Figs. 8 to 14. Fig. 8 shows the diffusion prevention hood 1 placed on the head and shoulders of a subject 4. Fig. 9 shows the diffusion prevention hood 1 as viewed from the top of the subject 4, and will be referred to as a front view hereinafter. Fig. 10 shows the diffusion prevention hood 1 as viewed from the torso of the subject 4, and will be referred to as a back view hereinafter. Figs. 11 and 12 show the diffusion prevention hood 1 as viewed from the side of the subject 4, and will be referred to as a right side view and a left side view hereinafter. Fig. 13 shows the diffusion prevention hood 1 as viewed from the top surface direction, and will be referred to as a plan view hereinafter. Fig. 14 shows the state before the diffusion prevention hood 1 is placed on the head of the subject 4. The diffusion prevention hood 1 according to the second embodiment, which is different from the first embodiment, will be described with reference to Figs. 8 to 14.

The hood 3 shown in Figures 8 and 14 is in an assembled state. As shown in Figure 14, the bottom peripheral wall 3f of the hood 3 of embodiment 2 is connected to the left side peripheral wall 3e by folding cardboard material or with adhesive. The bottom peripheral wall 3f is placed on a bed or floor, the right side peripheral wall 3d and the left side peripheral wall 3e are raised, and the top peripheral wall 3a is inserted like a lid. After the hood 3 that accommodates the head of the subject 4 is completed, the hood 3 can be placed over the head and shoulders of the subject 4 by tilting the hood 3 in the direction indicated by the arrow 12.

In this embodiment, the hood 3 has a width W3 of 530 mm, a depth D2 of 400 mm, and a height H3 of 500 mm.

As shown in FIG. 9, a film is attached to the front peripheral wall 3b so as to cover the openings 6a and 6b, and the film has perforations 6g and 6h extending horizontally. The length of the perforations 6g and 6h is the same as that of the perforations 6c and 6d.

In addition, as shown in Figures 9 and 14, the front peripheral wall 3b is provided with a slit 6i into which the protruding portion 10f extending from the bottom peripheral wall 3f is inserted.

As shown in Figures 8 and 10, the rear peripheral wall 3c is provided with an opening surface 7g (third opening surface) for passing the shoulders of the subject 4. The shape of the opening surface 7g can be any shape as long as it can accommodate the subject 4's shoulders within the hood 3. The opening surface 7g has the same width W1 as the hood 3 from the bottom peripheral wall 3f to a position of height H4, and can accommodate the subject 4's shoulders.

In this embodiment, the hood 3 has a height H4 of the opening surface 7g of 120 mm, a height H5 of 270 mm, and a width W4 of 470 mm.

A film is attached to the rear peripheral wall 3c so as to close the opening 7g. A slit 7h is provided in the film in the vertical direction. This film serves to reduce the gap that occurs at the shoulders when the head and shoulders of the subject 4 enter the inside of the diffusion prevention hood 1.

In addition, as shown in Figs. 8 and 10, the opening surface 8d that appears when the door 8a on the rear peripheral wall 3c is opened is provided with a film that covers the opening surface 8d. The door 8a is omitted in Fig. 8. The film that covers the opening surface 8d has perforations 8g provided vertically from the top to the bottom of the opening surface 8d. By providing a film that covers the entire opening surface 8d, it is possible to prevent droplets from spreading from the opening surface 8d. Also, by providing the perforations 8g, it is possible to easily insert and remove treatment instruments, etc. The material of the film that covers the opening surface 8d is the same as that of the film that covers the opening surfaces 6a and 6b.

As shown in Figures 11 and 12, a film is attached to the right side peripheral wall 3d and the left side peripheral wall 3e from the inside of the hood 3 so as to cover the opening surfaces 9a and 9b, and the film has perforations 9k and 9l in the vertical direction. The material of the film and the length of the perforations 9k and 9l are the same as those of the film and perforations 6c and 6d that cover the opening surfaces 6a and 6b.

As shown in FIG. 11, the right side peripheral wall 3d is provided with a mark 9m for forming a hole for mounting the fan filter unit 2.

Also, as shown in FIG. 11, the right side peripheral wall 3d is provided with a slit 9n for inserting the protrusion 10g extending from the bottom peripheral wall 3f.

Furthermore, as shown in Figs. 11 and 12, the right side peripheral wall 3d and the left side peripheral wall 3e are provided with zipper sections 9o, 9p, and 9q formed by perforations. After using the diffusion prevention hood 1, the zipper sections 9o, 9p, and 9q can be cut off to separate the hood 3 and discard it.

As shown in Figs. 13 and 14, the bottom peripheral wall 3f is configured to be the same size as the top peripheral wall 3a. Specifically, unlike the first embodiment, the bottom peripheral wall 3f does not extend in the direction of the torso of the subject 4, and the length of the bottom peripheral wall 3f in the depth direction (x direction) is the same as the length of the top peripheral wall 3a in the depth direction. In addition, the length of the bottom peripheral wall 3f in the width direction (y direction) is the same as the length of the top peripheral wall 3a in the width direction. The hood 3 of this embodiment can accommodate up to the shoulders of the subject 4, so the subject 4's head and torso can be placed on the bottom peripheral wall 3f to hold the hood 3 in place, and the hood 3 can be fixed.

As shown in Figures 8 to 14, the bottom peripheral wall 3f has a protrusion 10f (third protrusion) on side 10h and a protrusion 10g (fourth protrusion) on side 10d. The protrusions 10f, 10g are inserted into the slits 6i in the front peripheral wall 3b and the slits 9n in the right peripheral wall 3d when the hood 3 is placed on the subject. By inserting the protrusions 10f, 10g into the slits 6i, 9n, the gaps between the bottom peripheral wall 3f and the front peripheral wall 3b and right peripheral wall 3d can be reduced.

According to this embodiment, the hood 3 is configured to open on the side of the subject 4, so that the subject 4 lying on a stretcher or the like can be covered by a doctor, nurse, etc. while visually observing the top and sides of the subject 4's head as they work. Therefore, by simply laying down the assembled hood 3, the hood 3 can be easily and accurately placed over the head and shoulders of the subject 4.

In addition, according to this embodiment, the hood 3 is configured to be able to accommodate the subject 4 up to the shoulders, so that the subject 4 can place his/her head and torso on the bottom peripheral wall 3f to hold down the hood 3, thereby fixing the hood 3 in place. This also reduces the sense of pressure felt by the subject 4 when wearing the hood 3.

In addition, according to this embodiment, by inserting the protrusions 10f, 10g provided on the bottom peripheral wall 3f into the slits 6i, 9n in the front peripheral wall 3b and the right side peripheral wall 3d, the bottom peripheral wall 3f can be fixed to the front peripheral wall 3b and the right side peripheral wall 3d, and the gaps between the bottom peripheral wall 3f and the front peripheral wall 3b and the right side peripheral wall 3d can be closed.

In addition, according to this embodiment, the hood 3 is provided with zipper sections 9o, 9p, and 9q, so that it can be disassembled and discarded after use.

(Modification)
Although the embodiment of the present invention has been described above, various modifications and applications are possible in carrying out the present invention.

In the above embodiment 1, the front peripheral wall 3b has two holes for inserting hands, but this is not limited to the above. For example, the front peripheral wall 3b may have one hole large enough to insert both hands, and the film covering the hole may have two perforations.

In the above embodiment 1, the rear peripheral wall 3c is provided with a film 7b that covers the entire opening surface 7a, but the shape of the film is not limited to this. For example, as shown in FIG. 15, the film 7e may have a U-shaped opening surface 7f that matches the shape of the neck.

In addition, in the above embodiment 1, the door 8a and the opening surface 8d that appears when the door 8a is opened are provided on the rear peripheral wall 3c, but this is not limited to the above. The door 8a and the opening surface 8d may be provided on the right peripheral wall 3d or the left peripheral wall 3e.

In addition, in the above embodiment 1, the cutout portion 8b and the cutout portion 8c are combined to form a circular hole, but this is not limited thereto, and the hole may be, for example, rectangular. Also, a cutout portion may be provided in either the door 8a or the rear peripheral wall 3c to facilitate opening and closing the door.

In addition, in the above embodiment 2, the bottom peripheral wall 3f is connected to the left side peripheral wall 3e by folding the cardboard material or by adhesive, but this is not limited to the above. The bottom peripheral wall 3f may be connected to the right side peripheral wall 3d by folding the cardboard material or by adhesive, instead of the left side peripheral wall 3e.

The configuration shown in the above-mentioned embodiment 1 and the configuration shown in the above-mentioned embodiment 2 may be combined, or the corresponding configurations may be replaced. For example, the shape of the opening surface 7a in embodiment 1 may be the shape of the opening surface 7g in embodiment 2. Also, for example, instead of the stopper film 8e in embodiment 1, a film that covers the entire surface of the opening surface 8d in embodiment 2 may be provided on the opening surface 8d in embodiment 1.

In addition, in the above-mentioned first and second embodiments, the bottom peripheral wall 3f has two protruding portions, but it may have one or three or more protruding portions. In that case, the same number of slits as the number of protruding portions are provided in the front peripheral wall 3b, the right side peripheral wall 3d, and the left side peripheral wall 3e.

The present invention provides a small, disposable diffusion prevention hood.

1 Diffusion prevention hood 2 Fan filter unit 3 Hood 3a Top peripheral wall 3b Front peripheral wall 3c Back peripheral wall 3d Right side peripheral wall 3e Left side peripheral wall 3f Bottom peripheral wall 4 Subject 5, 6a, 6b, 7a, 7f, 7g, 8d, 9a, 9b Opening surface 6c, 6d, 6g, 6h, 9c, 9d, 9k, 9l Perforation 6e, 6f, 6i, 7c, 9g, 9h, 9n Slit 7b, 7e Film 7d, 9i, 9j, 10d, 10e, 10h Side 8a Door 8b, 8c Cutout portion 8e Stopper film 8f Fold 9e, 9f, 9m, 10a Mark 9o, 9p, 9q Zipper portion 10b, 10c, 10f, 10g Protrusion 11, 12 Arrow

Claims (9)

A diffusion prevention hood that covers the head of a subject and includes a hood having six peripheral walls and a fan filter unit that draws in air within the hood,
The hood is
A first opening surface that connects from a peripheral wall of the top surface to a peripheral wall on the top side of the subject's head;
At least one second opening surface provided on a peripheral wall on the parietal side of the subject;
A third opening surface provided in the peripheral wall on the torso side of the subject for passing the neck or shoulder of the subject;
At least one or more fourth opening surfaces provided on either the left or right or torso side of the subject;
At least one or more fifth opening surfaces having a door, the fifth opening surface being an opening surface provided in a peripheral wall on either the left or right side or the torso side of the subject;
Equipped with
a film is attached to the hood to cover the first opening surface, the second opening surface, and the fourth opening surface;
a film that closes the second opening surface and the fourth opening surface is made of a soft resin material;
The film that closes the second opening surface and the fourth opening surface is provided with perforations,
The peripheral wall of the bottom surface has at least one protruding portion,
At least one of the left and right peripheral walls and the peripheral wall on the top side of the subject has a slit into which the protruding portion is inserted when the hood is placed on the subject,
The height of the hood is in the range of 300 mm to 800 mm;
The distance of the hood from the top of the head of the subject to the torso direction is in the range of 200 mm to 500 mm. A stopper film is attached to the hood to prevent the door from entering the hood,
The hood is provided with a cutout portion for facilitating opening and closing of the door,
2. The diffusion prevention hood according to claim 1, wherein the stopper film has a size sufficient to cover the notch when the door is closed. A film that covers the fifth opening surface is attached to the hood,
The hood is provided with a cutout portion for facilitating opening and closing of the door,
The diffusion prevention hood according to claim 1 , wherein the film closing the fifth opening surface is provided with perforations. 3. The diffusion prevention hood according to claim 1, wherein a film that closes the second opening surface and the fourth opening surface is attached from the inside of the hood. the bottom peripheral wall has a first protrusion that is inserted into a slit in the peripheral wall on the right side of the subject when the hood is placed on the subject, and a second protrusion that is inserted into a slit in the peripheral wall on the left side of the subject,
the peripheral wall on the right side of the subject has a slit into which the first protrusion is inserted,
the peripheral wall on the left side of the subject has a slit into which the second protrusion is inserted,
5. The diffusion prevention hood according to claim 1, wherein a peripheral wall on the top side of the subject's head has slits into which the first protrusion and the second protrusion are inserted when the hood is folded. the bottom peripheral wall has a third protrusion that is inserted into a slit in the peripheral wall on the top side of the subject's head when the hood is placed on the subject, and a fourth protrusion that is inserted into a slit in one of the left and right peripheral walls of the subject,
a peripheral wall on the parietal side of the subject's head has a slit into which the fourth protrusion is inserted,
The diffusion prevention hood according to any one of claims 1 to 4, wherein one of the left and right peripheral walls of the subject has a slit into which the fourth protrusion is inserted. The left and right peripheral walls of the subject have zipper portions formed by perforating the left and right peripheral walls,
7. The diffusion prevention hood according to claim 6, wherein the hood is divided by cutting off the zipper portion. 8. The diffusion prevention hood according to claim 1, wherein the hood is formed from a cardboard material, and the grain direction of the cardboard material of the peripheral wall on the top of the subject's head, the peripheral wall on the torso side of the subject, and the peripheral walls on the left and right sides of the subject is positioned vertically when the hood is placed on the subject. The diffusion prevention hood according to any one of claims 1 to 8, wherein a film for covering the third opening surface is attached to the hood.

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