JP3377512B2 - Air massage machine and air bag used for it - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air massager for inflating and contracting an air bag for massaging, and a structure of the air bag used therein.

[0002]

2. Description of the Related Art An air bag used in an air massager is formed in a bellows shape as shown in FIGS. An air bag A ′ shown in FIG. 6 has a cylindrical shape, a bellows portion 1 having a zigzag cross section is provided on the outer peripheral surface, and an air port 2 is provided on the lower surface. An air bag A "shown in Fig. 7 has a flat plate shape with a hollow inside, a bellows portion 1 having a zigzag cross section is provided on the upper surface, and an air port 2 is provided on the lower surface. These air bags A ', A ″ Is manufactured by blow molding or by welding two sheets (not shown), etc., but blow molding has the advantage that it can be mass-produced and three-dimensionally molded, but the bulging margin If a bellows (bellows) type air bag is used so as to take a large value, it causes an irreversible shape change such as inversion as shown in FIGS. 8 and 9 in the cycle of expansion and contraction, or by receiving an external force from the human body or the like. There was a problem of being lost. Symbol a in FIGS. 8 and 9
The portion indicated by is the inverted portion that caused the inversion.

[0003] Once the air bag is turned over, a part of the air bag is not bent and returns to its original shape, so that not only the massage feeling and the feeling of hitting the human body are deteriorated. However, the life will be greatly deteriorated.

The present invention has been made in view of the above problems, and by providing an air bag-shaped inversion prevention structure, it is possible to prevent a feeling of massaging, a feeling of hitting a human body, and a deterioration of the life of an air bag, and thus an air bag. To provide an air massager capable of mass production and three-dimensional molding, and an air bag used for it.

[0005]

In order to solve the above problems, an air massager of the present invention comprises a plurality of bellows-shaped air bags, an air pump for supplying air to the air bags, and an air bag for supplying air to the air bags. and a air control device for controlling the from the supply or air bags to or remove the air, an air massager that gives body to the pressure massage by the expansion and contraction of the air bag
There are, in what shape of the air bag is provided with a reversing prevention structure easily return to up shape during contraction without inverting be repeated expansion and contraction, air bag substantially in the center of the circle
An annular shape with a V-shaped cross section from the frustum-shaped disc portion toward the outer circumference
Expansion and contraction by alternately providing valleys and annular peaks with a V-shaped cross section
A bellows is formed as a free-standing structure by forming a flexible bellows.
U-shaped juxtaposed to cross the chevron cross section
The first characteristic is that it has a V-shaped groove shape.
It has a thickness in a part of the chevron cross section in the bellows shape.
In that you have provided a meat portion has a second feature, further
A closed air chamber in a part of the chevron section of the bellows
The third feature is that it is provided. Flat air
-A simple structure ensures that the outer circumference of the bag is not reversed.
It is something that can be done.

Moreover, in the case of the above groove shape, the reverse prevention
Expansion and contraction with a simple stop structure and a shape suitable for mass production
The bellows (bellows) -shaped flexure accompanying U-shaped or V-shaped
Can be absorbed by the widening or narrowing of the open part
At the same time, the bending is not evenly distributed to one side of the mountain
Since it can be dispersed, it has high rigidity against inversion.
Can be taken

Further , when it is composed of a thick portion, air
It does not affect the appearance of the bag, i.e. it hits the human body.
Bellows (bellows) that cause reversal without sacrificing feeling
The flexural rigidity of the shape increases.

In the case of a closed air chamber,
The appearance, that is, the feeling of hitting the human body, is not compromised by the air chamber.
Bellows that causes inversion while providing cushioning properties
The flexural rigidity of the (bellows) shape increases.

A plurality of the inversion prevention structures are provided.
And the bending of the bellows (bellows) shape that causes the reversal
Since it can be dispersed, it is more effective in preventing inversion.
It

At this time, an interval of 90 ° or less when viewed from the center
Equipped with a bellows (bellows) shape in a circle
It is possible to effectively provide an inversion prevention structure with a small number.
Wear.

Further , a bellows shape is used as the inversion prevention structure.
Air chamber sealed by a circular truncated cone-shaped disk in the center of
Is equipped, it is possible to easily prevent the center part from inverting.
it can. Moreover, by providing the inversion prevention structure in the central part,
Regardless of whether the airbag is inflated or deflated, it may
However, the shape will not be inverted, so it is more effective
Moreover, since it is composed of a closed air chamber, it is suitable
Reversal by external force such as human body while maintaining good cushioning
It can be prevented.

Further , the air bag has a truncated cone shape in the center.
From the disk part to the outer circumference, disconnect from the annular valley part with a V-shaped cross section.
Snake that can be expanded and contracted by alternately providing annular V-shaped circular mountain parts
When the abdomen is formed, it is added to a part of the airbag.
Little expansion due to pressure and conforms to the contracted shape of the expansion surface
Equipped with a non-expanding surface with overhanging shape as an inversion prevention structure
It may be the one that is already available. In this case also flat air
You can reliably prevent the bag from inverting with a simple structure.
It Especially when the air bag is deflated,
Therefore, it can be prevented from being reversed.

It is also preferable that the bellows-shaped expansion surface is provided in the compression direction of the body and in the opposite direction. The bellows-shaped inflating surface of the airbag is also provided on the side opposite to the body compression direction, so that the protruding amount of the airbag can be doubled even at the same pressure.

Further, a plurality of air chambers of the air bag having the bellows shape are provided in the compression direction of the body, and these air chambers do not communicate with each other and are individually inflated and expanded.
It is also preferable to be characterized in that it can shrink. By doing so, multiple levels of compression can be applied to the body, so that stronger or weaker compression or finer compression can be controlled.

It is also preferable that the plurality of air chambers provided in the compression direction of the body are configured to expand with different directions. By configuring the air bag to inflate with different directions, it is possible to change the pressure and direction of the body.

The air bag of the present invention has a circle in the approximate center.
Cross-section substantially V-shaped annular toward the outer periphery from the frustum-shaped disc portion
Expansion and contraction by alternately providing valleys and annular peaks with a V-shaped cross section
An air bag with a flexible bellows
Prevents inversion of the chevron section in a part of the chevron section
Because of the anti-reverse structure, or the air bag
Expansion due to pressurization on a part of
Prevents reversal of non-expanding surface with overhanging shape
Since it is provided as a structure, it is possible to prevent the shape of the air bag from being reversed and returning to the original shape, and it can be effectively used as an air bag of an air massage machine.

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION As shown in FIG. 5, an air massage machine includes a frame 3, a seat portion 4, a backrest portion 5, an armrest 6,
It has a footrest 7 and the like. An air bag A is embedded in the backrest 5, the footrest 7, and the like. As shown in FIG. 4, air is supplied to the plurality of air bags A from an air pump 8 via an air control device 9. Air control device 9 is adapted to perform control or remove the air from the air bag A and supplies air to the air bag A.

The air bag A made of synthetic resin, rubber or the like has a bellows shape and is designed to expand and contract, and an example thereof is shown in FIG. The airbag A in FIG. 1 is composed of an upper sheet 10 and a lower sheet 11, and the peripheral edges of the upper sheet 10 and the lower sheet 11 are welded and integrated. In the case of this example, the bellows portion 1 is provided on the upper sheet 10 so that it can be expanded and contracted. A circular truncated cone-shaped disc portion 1a is provided substantially at the center of the upper sheet 10, and a trough portion 1b having a substantially V-shaped section and a substantially V-shaped section are provided from the outer periphery of the circular disc portion 1a toward the outer periphery of the upper sheet 10. And the mountain portions 1c are alternately provided. Tanibe 1b
The mountain portion 1c is formed in an annular shape. Then, the bellows portion 1 which is expandable and contractable by the disc portion 1a, the valley portion 1b, and the mountain portion 1c.
Has been formed. An air port 2 communicating with the inside is provided at the center of the lower sheet 11.

A closed air chamber 12 is provided on the upper surface of the disc portion 1a of the upper sheet 10, and the closed air chamber 12 has a structure for preventing the inversion of the central portion. A V-shaped groove portion 13 is provided on the mountain portion of the upper sheet 10, and the groove portion 13 has a structure for preventing the inversion of the outer peripheral portion. The groove 13 may be U-shaped. Further, a plurality of groove portions 13 are provided in each of the plurality of mountain portions 1c. Further, the groove portion 13 provided in each mountain portion 1c is provided so as to cross the mountain portion 1c. Further, as described above, the plurality of groove portions 13 are provided as the outer periphery inversion prevention structure, and the groove portions 13 are provided at an angular interval of 90 ° or less when viewed from the center portion. By providing the groove portion 13 as the inversion prevention structure as described above, the bending of the airbag can be absorbed by the groove portion 13 even when the cycle of inflation and deflation of the airbag A is repeated. Further, by providing a closed air chamber 12 as a reversal prevention structure in the central portion, the reversal does not occur even if a load is received.

FIG. 2 shows another example of the air bag A. This example is also basically the same as the above example, and only different points will be mainly described. In the case of this example, the bellows portion 1 is provided on both the upper sheet 10 and the lower sheet 11. Upper sheet 10 and lower sheet 1
1 has a circular truncated cone-shaped disc portion 1a at substantially the center thereof.
There is a truncated cone-shaped convex portion 1d at the center of a, and a valley portion 1b having a substantially V-shaped cross section and a mountain portion 1c having a substantially V-shaped cross section are provided from the outer circumference of the disk portion 1a toward the outer circumference of the upper sheet 10. And are provided alternately. The valley portion 1b and the peak portion 1c are formed in an annular shape.
Then, the disk portion 1a, the valley portion 1b, the peak portion 1c, and the convex portion 1d.
An elastic bellows portion 1 is formed by and. Lower sheet 11
An air port 2 is formed on the outer periphery of the. Ribs 14 are provided at equal intervals in the circumferential direction on the outer surface between the convex portion 1d and the disc portion 1a. The ribs 14 have increased rigidity so as not to bend, and the ribs 14 are located at the central portion. It has an inversion prevention structure. Further, the mountain portion 1c is provided with a thick portion 15, and the rigidity is increased so that the thick portion 15 does not bend.
The thick portion 15 has a structure for preventing the inversion of the outer peripheral portion. The thick portion 15 is formed of a plurality of ridges 1c, and a plurality of ridges 1c are provided in the circumferential direction of each ridge 1c. Further, as described above, a plurality of thick-walled portions 15 are provided as the inversion prevention structure of the outer peripheral portion, and the thick-walled portions 15 are provided at an angular interval of 90 ° or less when viewed from the central portion. In the case of this air bag A, the inflated surface which is the bellows portion 1 is provided on both sides (it is also provided with the inflated surface opposite to the body compression direction), and the protruding amount of the air bag A can be doubled. .

FIG. 3 shows another example of the air bag A. This example is also basically the same as the above example, and only different points will be mainly described. Also in this example, the bellows portion 1 is provided on both the upper sheet 10 and the lower sheet 11. The upper sheet 10 and the lower sheet 11 each have a circular truncated cone-shaped disc portion 1a at the center thereof, and the circular disk portion 1a has a circular truncated cone-shaped convex portion 1d at the center thereof.
A trough portion 1b having a substantially V-shaped cross section and a mountain portion 1c having a substantially V-shaped cross section are alternately provided from the outer periphery of the above to the outer periphery of the upper sheet 10. The valley portion 1b and the peak portion 1c are formed in an annular shape.
Then, the disk portion 1a, the valley portion 1b, the peak portion 1c, and the convex portion 1d.
An elastic bellows portion 1 is formed by and. Top sheet 10
An air port 2 is formed on the outer periphery of the lower sheet 11. A rib 16 is provided so as to project inward from the inner surface of the top of the convex portion 1d in the central portion. The rib 16 has increased rigidity so as not to bend, and the rib 16 serves as an inversion prevention structure in the central portion. Has become. Further, a closed air chamber 17 is provided in the mountain portion 1c on the outer peripheral portion, and the rigidity is increased by the closed air chamber 17, and this closed air chamber 17 has a structure for preventing reversal of the outer peripheral portion. The closed air chamber 17 has a plurality of ridges 1c.
A plurality are provided in the circumferential direction of each mountain portion 1c. Further, as described above, a plurality of sealed air chambers 17 are provided as the structure for preventing the inversion of the outer peripheral portion, and the sealed air chambers 17 are provided at an angular interval of 90 ° or less when viewed from the central portion. Between the upper sheet 10 and the lower sheet 11, there is provided a non-expansion surface 18 that slightly expands from the central portion to the outer peripheral portion. A protruding shape is provided along the contracted shape of the bellows portion 1. Reference numeral 19 denotes an outer peripheral protruding portion, and 20 denotes a central protruding portion. These overhanging shape parts 1
9 and 20 form an inversion prevention structure that prevents the airbag shape from being inverted by an external force such as a human body. The inside of the air bag A is divided into two air chambers 21 with the non-inflatable surface 18 as a boundary, and each air chamber 21 is made to communicate with a different air port 2 respectively. Independent expansion of stages is possible. The air chamber 21 is expanded in different directions so that the direction of the massage force applied to the human body can be changed three-dimensionally.

[0022]

As described above, the invention of claim 1 of the present invention is provided with the inversion prevention structure in which the shape of the airbag does not invert even if it repeatedly inflates and deflates but easily returns to the shape when it contracts. It is possible to prevent the shape of the airbag from reversing and not returning to its original shape, which can prevent a feeling of massage, a feeling of hitting the human body and a reduction in the life of the airbag. Frustoconical disk part
From the outer periphery to the outer periphery, the V-shaped cross section and the V-shaped cross section
The bellows that can be expanded and contracted by alternately providing the letter-shaped annular mountain part
Form and prevent inversion, as a bellows shape mountain
U-shaped or V-shaped so as to cross the cross section
Since it has a groove shape, it can be used for flat air bags.
It is possible to securely prevent the inversion of the outer periphery with a simple structure.
It is possible, and the inversion prevention structure is simple and large in volume.
It has a shape suitable for production, and bellows (snake
(Belly) shape of U-shaped or V-shaped open part
Can be absorbed by spreading and narrowing, and at the same time
Can be evenly distributed without uneven deflection
Therefore, it is possible to secure high rigidity against inversion.
It

Further the second aspect of the present invention, 如narrative
The shape of the air bag reverses even if it repeatedly expands and contracts.
Equipped with an inversion prevention structure that easily returns to the shape when contracted without
As a result, the shape of the airbag is reversed and returned to its original shape.
It can be prevented from disappearing, and it gives a feeling of massage and hits the human body.
It can prevent the feeling and shortening of the life of the airbag.
In particular, an air bag is a circular truncated cone in the center.
From the rim toward the outer circumference and the V-shaped cross section
A bellows part that can be expanded and contracted by alternately providing V-shaped annular mountain parts
To prevent the inversion of the bellows shape.
Since the part of the chevron cross section has a thick wall,
Prevents inversion of the outer peripheral part of the arc bag with a simple structure.
It is something that can be done, and an air bag
Without affecting the appearance of the body, that is, the feeling of hitting the human body
Of bellows (bellows) shape that causes reversal without impairing
The flexural rigidity is increased.

The invention according to claim 3 of the present invention is directed to an air bag.
Even if the shape of the bag repeatedly expands and contracts, it does not reverse but contracts.
Since it has an inversion prevention structure that easily returns to the original shape,
The shape of the arbag will be reversed and it will not return to its original shape
It can prevent the feeling of massage, hitting the human body and air.
It is possible to prevent the life of the bag from decreasing.
In particular, the air bag starts from the circular disk part of the truncated cone shape in the center.
Toroidal valley with a V-shaped cross section and circle with a V-shaped cross section
An annular bellows is provided alternately to form a flexible bellows,
As an inversion prevention structure, the bellows-shaped chevron cross section
The appearance, that is, people
Cushioning by the air chamber without losing the feeling of hitting the body
With a bellows shape that causes reversal
The flexural rigidity is increased.

According to the fourth aspect of the present invention, since a plurality of the inversion prevention structures are provided , the cause of the inversion is
Since it is possible to disperse a certain bellows- shaped bend, it is more effective in preventing inversion .

According to the invention of claim 5 of the present invention, a plurality of
Since the rolling prevention structure is provided at intervals of 90 ° or less when viewed from the central portion, it is possible to effectively provide the rolling prevention structure in a small number in a bellows shape continuous in a circular shape.

The invention according to claim 6 of the present invention is directed to an air bag.
The cross section is from the frustoconical disk in the center to the outer circumference.
A substantially V-shaped annular valley portion and a substantially V-shaped annular mountain portion
Alternately provided to form a flexible bellows part, preventing inversion
As a bellows-shaped disk with a truncated cone in the center
With a sealed air chamber in the center,
It can be stopped easily. In addition, inversion prevention in the center
Due to the structure, we are concerned about the inflation and deflation of the airbag.
And the shape will not be inverted due to human body load etc.
It is even more effective and has a closed air chamber.
Since it is made up of
It is possible to prevent inversion due to external force such as.

According to a seventh aspect of the present invention, the air bag is
The cross section is from the frustoconical disk in the center to the outer circumference.
A substantially V-shaped annular valley portion and a substantially V-shaped annular mountain portion
Air bags that are provided alternately to form a flexible bellows
There is little expansion due to pressurization on part of the
Anti-inversion structure of non-expanded surface having a projecting shape along the shape
Inversion of a flat air bag because it is equipped as a structure
The prevention can be surely performed with a simple structure. Especially air
-Inverted by the external force of the human body when the bag contracts
Can be prevented.

The invention according to claim 8 of the present invention is the bellows.
The shape of the expansion surface is in the compression direction of the body and the opposite direction
Since it is equipped with the same pressure, the airbag
The output can be doubled.

The invention according to claim 9 of the present invention is the bellows.
The air chamber of the air bag with the shape of
Are provided for each of the
Without being able to expand and contract independently
For this reason, since multiple levels of compression can be applied to the body,
Control of strong or weak compression or finer compression is possible
It becomes Noh.

The invention of claim 10 of the present invention is directed to
Different air chambers are provided depending on the body compression direction.
Because it is configured to expand with directionality,
Designed so that the air bag inflates in different directions.
By doing it, you can change the pressing force and direction to the body
It

The invention according to claim 11 of the present invention is substantially the center.
A circular V-shaped cross section from the frustoconical disk part to the outer circumference
An annular valley and an annular mountain with a substantially V-shaped cross section are provided alternately.
An air bag with a flexible bellows
Invert the chevron section in a part of the chevron section in the rose shape.
Because it has a reverse prevention structure to prevent it,
You can prevent the shape from reversing and returning to the original shape,
Useful as an air bag for an air massager
Wear.

The invention of claim 12 of the present invention is the air
There is little expansion due to pressure on a part of the bag and the expansion surface is
Inverts a non-expanding surface that has an overhanging shape that conforms to the shape when contracted
The shape of the air bag because it is provided as a prevention structure
But it is possible to prevent the Kunar a return to the original shape is inverted, air
-It can be used as an air bag for massage machines.
It

[Brief description of drawings]

FIG. 1 shows an airbag according to an example of an embodiment of the present invention, in which (a) is a perspective view and (b) is a sectional view.

2A and 2B show another example of the above airbag, wherein FIG. 2A is a perspective view and FIG. 2B is a sectional view.

3A and 3B show another example of the airbag of the above, wherein FIG. 3A is a perspective view and FIG. 3B is a sectional view.

FIG. 4 is a pipeline diagram of the above air massager.

FIG. 5 is a perspective view showing an appearance of the above air massager.

6A and 6B show an example of a conventional air bag, in which FIG. 6A is a perspective view and FIG. 6B is a sectional view.

7A and 7B show another conventional airbag, in which FIG. 7A is a perspective view and FIG. 7B is a sectional view.

FIG. 8 shows a problem of the conventional example of FIG. 8, (a) is a perspective view,
(B) is a sectional view.

9 shows a problem of the conventional example of FIG. 7, (a) is a perspective view,
(B) is a sectional view.

[Explanation of symbols]

A air bag 1 bellows 12 closed air chamber 13 groove 14 ribs 15 Thick part 16 ribs 17 Closed air chamber 18 Non-expanding surface 19 Overhanging shape part 20 Overhanging shape part

─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Toshiaki Minamino 1048, Kadoma, Kadoma, Osaka Prefecture Matsushita Electric Works Co., Ltd. (72) Inventor, Koji Matsumoto, 1048, Kadoma, Kadoma City, Osaka Matsushita Electric Works, Ltd. (56) References JP-A-2002-126025 (JP, A) JP-A-10-155853 (JP, A) JP-A-10-295751 (JP, A) JP-A-63-92358 (JP, A) (58) Field (Int.Cl. ⁷ , DB name) A61H 7/00

Claims (12)

(57) [Claims] 1. A plurality of bellows-shaped air bags, an air pump for supplying air to the air bags, and an air control device for controlling air supply to and air removal from the air bags. In an air massager that is provided with a pressure massage to the body by expanding and contracting the air bag, the air bag is directed from the substantially central frustoconical disc portion to the outer periphery.
And V-shaped cross-section valley and V-shaped cross-section
By forming the bellows part that can expand and contract by alternately providing parts and
Therefore, even if the shape of the airbag is repeatedly inflated and deflated, it does not invert and the inflated shape easily returns to the original shape.
As to cross the chevron cross section in the bellows shape
An air massager characterized in that it is provided with a U-shaped or V-shaped groove shape provided in . 2. A plurality of air bags having a bellows shape.
And an air pump that supplies air to the air bag
To supply air to the air bag or
And an air control device that controls the removal of air from
It is equipped with an air bag that compresses the body by expanding and contracting the air bag.
In an air massager that gives a massage,
The arc bag is oriented from the frusto-conical disc in the center to the outer circumference.
And V-shaped cross-section valley and V-shaped cross-section
By forming the bellows part that can expand and contract by alternately providing parts and
Yes, the shape of the air bag repeatedly inflates and contracts
Inversion prevention structure that easily returns to the shape when contracted without inverting
As a part of the chevron cross section in the bellows shape,
An air massager characterized by being equipped with . 3. A plurality of air bags having a bellows shape.
And an air pump that supplies air to the air bag
To supply air to the air bag or
And an air control device that controls the removal of air from
It is equipped with an air bag that compresses the body by expanding and contracting the air bag.
In an air massager that gives a massage,
The arc bag is oriented from the frusto-conical disc in the center to the outer circumference.
And V-shaped cross-section valley and V-shaped cross-section
Obtained by forming a stretchable snake abdominal provided alternately and parts
Yes, the shape of the air bag repeatedly inflates and contracts
Inversion prevention structure that easily returns to the shape when contracted without inverting
As a bellows shape, a closed space is partially
An air massager characterized by having an air chamber . 4. A plurality of the inversion prevention structures are provided.
The air massager according to any one of claims 1 to 3, wherein 5. The anti-reversal structure is 90 when viewed from the center.
The air massager according to claim 4, wherein the air massager is provided at intervals of not more than °. 6. A plurality of air bags having a bellows shape.
And an air pump that supplies air to the air bag
To supply air to the air bag or
And an air control device that controls the removal of air from
It is equipped with an air bag that compresses the body by expanding and contracting the air bag.
In an air massager that gives a massage,
The arc bag is oriented from the frusto-conical disc in the center to the outer circumference.
And V-shaped cross-section valley and V-shaped cross-section
By forming the bellows part that can expand and contract by alternately providing parts and
Yes, the shape of the air bag repeatedly inflates and contracts
Inversion prevention structure that easily returns to the shape when contracted without inverting
As a bellows-shaped disk with a truncated cone in the center
An air massager , characterized in that it is provided with a sealed air chamber . 7. A plurality of air bags having a bellows shape.
And an air pump that supplies air to the air bag
To supply air to the air bag or
And an air control device that controls the removal of air from
It is equipped with an air bag that compresses the body by expanding and contracting the air bag.
In an air massager that gives a massage,
The arc bag is oriented from the frusto-conical disc in the center to the outer circumference.
And V-shaped cross-section valley and V-shaped cross-section
By forming the bellows part that can expand and contract by alternately providing parts and
There is little inflation due to pressure on a part of the air bag.
In addition, it has an overhanging shape that follows the shape of the expansion surface when it contracts.
It is characterized by having a non-expansion surface as an inversion prevention structure.
Air massager that. 8. The bellows-shaped expansion surface of the body is
Characterized by being provided in the compression direction and the opposite direction
The air massager according to any one of claims 1 to 7 . 9. An air bag having the bellows shape
Multiple air chambers are provided in the compression direction of the body.
The air chambers do not communicate with each other and expand independently.
Claim 1 thru / or contract which made it possible to contract.
The air massager according to any one of claim 8 . 10. A plurality of devices are provided in the body compression direction.
As the obtained air chamber expands with different directions
The air massager according to claim 9 , wherein the air massager is configured. 11. A frusto-conical disc portion in the substantially central portion to the outer periphery
Towards a V-shaped circular trough and a V-shaped circular ring
E-shaped bellows are formed by alternately arranging
Arbag, which has a bellows-shaped cross section
Partly equipped with an inversion prevention structure that prevents the inversion of the chevron section
An air bag characterized by that. 12. A frusto-conical disc portion in a substantially central portion from the outer circumference
Towards a V-shaped circular trough and a V-shaped circular ring
E-shaped bellows are formed by alternately arranging
Arbag, which is made by applying pressure to a part of the air bag
Slight expansion and overhang along the shape of the expansion surface when contracted
Equipped with a non-expanding surface having a shape as an inversion prevention structure
An air bag characterized by that.