JP2711421B2 - Air bag for sphygmomanometer cuff band - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sphygmomanometer cuff band used for wrapping around a measured part of a body such as an upper arm at the time of measuring blood pressure, compressing the measured part by feeding air and pressurizing the air. More specifically, the present invention relates to a sphygmomanometer cuff band air bag formed by stacking two resin sheets and welding their peripheral portions to each other.

[0002]

2. Description of the Related Art An air bag A5 for a sphygmomanometer cuff band shown in FIG.
Prepares two rectangular resin sheets 2a and 2b, and connects a relay connector 4 to a central portion of one resin sheet 2a in advance.
Are welded by high frequency, and then both resin sheets 2a, 2
b are overlapped with each other, and the peripheral portion thereof is welded by high frequency over the entire circumference. A rubber air tube 6 is inserted into and connected to the nozzle portion of the relay connector 4.

[0003] In this type of air bag A5, relay when the relay connector 4 because it is located in the central portion of the totally independent resin sheet from a bonded portion 2m ₁ of the peripheral portion, which is inflated by air pressure A large pulling force does not act on the connector 4, and air leakage at the relay connector 4 rarely occurs. Moreover, since the welded portion 2m ₁ has a completely closed loop, it does not occur air leakage from the welded portion 2m _1.

[0004] On the other hand, however, the number of processing steps increases due to the welding of the relay connector 4, which tends to increase the cost. That is, a step of forming an insertion hole in the resin sheet 2a, a step of inserting the relay connector 4 into the insertion hole, and carefully and carefully attaching the relay connector 4 to the resin sheet 2a in a small area.
This is because a step of welding to the substrate is required.

On the other hand, the air bladders A6 and A7 shown in FIG. 10 and FIG.
In the peripheral portion of 2b, in A6, the relay connector is fitted into the nozzle insertion hole formed simultaneously with the high frequency welding of the peripheral portion, and in A7, the air tube is also welded with the high frequency welding of the peripheral portion. It is cost effective.

The air bag A6 shown in FIG. 10 has a nozzle insertion hole 10 for inserting one nozzle portion 8a of the relay connector 8 as an air introduction portion at the time of high frequency welding around the two resin sheets 2a and 2b. Simultaneously formed (see (a) of FIG. 12), the nozzle portion 8a of the relay connector 8 is fitted into the nozzle insertion hole 10 in close contact, and the air tube 6 is connected to the other nozzle portion 8b. It is. The welded portion 2m _{2 at the} peripheral portion is cut off at the junction connector 8 and the welded portion 2m ₃ reaching the sheet outer edge on both sides of the nozzle insertion hole 10.
It has become.

The air bag A7 shown in FIG. 13 is obtained by sandwiching the end 6a of the air tube 6 when two resin sheets 2a and 2b are overlapped, and welding the peripheral portion over the entire circumference. Both resin sheets 2a at a location other than the tube ends 6a, 2b are integrally joined by welding portion 2m _4. At the tube end 6a, as shown in FIG. 15 (a), both resin sheets 2a, 2b are integrally joined to the tube end 6a, not to the mating side.

[0008]

In the case of the air bag A6 shown in FIG. 10, when inflated by air supply and pressurization as shown in FIG. 11, the two resin sheets 2a and 2b are separated from each other and the welded portion 2m _2. , 2 m _{3 in the} direction away from the seat surface. Relay connector 8
Looking at the pulling force in the vicinity of, a radial pulling force is received as shown by the arrow in FIG. Then, as shown in FIG. 12B, the welded portions 2m ₃ on both sides of the nozzle insertion hole 10 are pulled by the peripheral welded portion 2m ₂ , the nozzle insertion hole 10 is enlarged, and the welded portion 2m ₃ is relayed. The connector 8 is separated from the nozzle portion 8a. In this case, the pressurized air inside the air bag A6 escapes to the outside through the enlarged nozzle insertion hole 10. In some cases, the relay connector 8 may come off.

In the case of the air bag A7 shown in FIG. 13, when inflated by air supply and pressurization as shown in FIG. Looking at the pulling force, it receives a discharging pulling force as shown by the arrow in FIG. Then, as shown in FIG. 15 (b), the pulling force concentrates on the tube end 6a and a hole is formed, which may cause air leakage.

The present invention has been made in view of the above circumstances, and is based on the premise that it is a type sandwiched between two resin sheets from the viewpoint of cost. Avoid air leaks,
It is an object to prevent the relay connector from coming off.

[0011]

A first air bag for a cuff band of a sphygmomanometer according to the present invention has two resin sheets overlapped with each other and communicates inward and outward at appropriate locations around the two resin sheets. In a state where the nozzle insertion hole to be formed is formed, the peripheral portions of both resin sheets and both sides of the nozzle insertion hole are welded,
In addition, in this welding, the dividing opening of the peripheral welding portion and the inner end of the welding portion on both sides of the insertion hole, a buffer region for allowing the expansion of the dividing opening when expanding in the middle of the flow path connecting them. A series of connections are made via a buffer welded portion that is connected in a formed state, and one nozzle portion of the relay connector is inserted and fitted into the nozzle insertion hole in a tight contact state, and the other of the relay connector is connected. An air tube is connected to the nozzle portion of the above.

Further, in the second air bag for the cuff band of the blood pressure monitor according to the present invention, two resin sheets are overlapped with each other, and the end of the air tube is sandwiched between appropriate portions of the peripheral portions of the two resin sheets. In this state, the peripheral portions of the two resin sheets and the sheet portions on both sides of the tube end are welded to each other and the tube end and each resin sheet are welded to each other. Buffer welding such that the dividing opening and the inner end of the welded portion on both sides of the tube end are connected in the middle of the flow path connecting them in a state of forming a buffer region for allowing expansion of the dividing opening at the time of expansion. It is characterized in that it is connected in series through a unit.

[0013]

According to the first air bag for the cuff band of the sphygmomanometer, since the buffer region formed by the buffer welding portion exists, each resin sheet extends in the surface direction when inflated by air supply and pressurization. Even if pulled, the tensile force is absorbed in the buffer area to expand the dividing opening of the peripheral welded portion, and the tensile force is a penetration between the nozzle portion of the relay connector and the welded portion between both resin sheets. Avoid direct addition to the weld on both sides of the hole.

According to the air bag for the second cuff band of the sphygmomanometer, since the buffer region formed by the buffer welding portion exists in the same manner as described above, the tensile force in the in-plane direction at the time of inflation is reduced by the peripheral welding portion. The tensile force is absorbed in the buffer area so as to expand the divided opening of the tube, so that the tensile force is welded between the sheet portions on both sides of the tube end. It is avoided that the sheet is directly applied to the welded portion with each sheet.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an air bag for a sphygmomanometer cuff band according to the present invention will be described below in detail with reference to the drawings.

First Embodiment FIG. 1 is a perspective view schematically showing the appearance of an air bag A1 for a sphygmomanometer cuff band according to a first embodiment, and FIG. 2 is an enlarged perspective view of a main part. The air bag A1 of the first embodiment uses the relay connector 24, and at the same time, uses the buffer region 30.
In a crank shape.

In the drawing, reference numerals 20a and 20b denote two resin sheets which are overlapped with each other, and 20m ₁ is integrally joined by high frequency welding over the entire periphery except for a suitable peripheral portion of both resin sheets 20a and 20b. The peripheral welded portion 22 is a nozzle insertion hole formed so as to communicate inward and outward around the resin sheets 20a and 20b, and 24 is one of the nozzle portions 24a inserted and fitted into the nozzle insertion hole 22. The relay connector 26 is a rubber air tube connected to the other nozzle 24 b of the relay connector 24.

The nozzle insertion hole 22 is formed by high frequency welding of both resin sheets 20a and 20b on both sides thereof. The welded portion is a welded portion 20 on both sides of the insertion hole.
m ₂ . One nozzle portion 24a of the relay connector 24
Are fitted airtightly by biting into the welding portions 20m ₂ on both sides of the insertion hole.

Reference numeral 28 denotes one dividing opening in the peripheral welding portion 20m ₁ . The dividing opening 28 and the welding portion 20m ₂ on both sides of the insertion hole are displaced in the side direction of the resin sheet.

The inner end of the welding portion 20m ₂ on both sides of the insertion hole and the dividing opening 28 of the peripheral welding portion 20m ₁ are connected in series by a crank-shaped buffer welding portion 20m ₃ . And this crank-shaped buffer welding portion 20m
₃ an air flow path formed inside the middle is, become a buffer region 30 for permitting the expansion of the peripheral portion welded portion 20 m ₁ of the divided opening 28 during inflation of the air bag A1 due to air pressure I have.

According to the air bag A1, since the buffer region 30 formed by the crank-shaped buffer welded portion 20m ₃ exists, the tensile force in the in-plane direction at the time of inflation is expanded in the dividing opening 28. The nozzle portion 24 a of the relay connector 24 and the two resin sheets 20
a, 20 m _2, welded on both sides of the insertion hole, which is a welded portion with 20 _b
Can be prevented from being directly applied with the pulling force.

By the action of absorbing the pulling force, peeling of the welded portion 20m ₂ on both sides of the insertion hole can be prevented, so that not only the removal of the relay connector 24 but also the air leakage can be reliably prevented.

Second Embodiment FIG. 3 is a perspective view showing a schematic appearance of an air bag A2 for a sphygmomanometer cuff band according to a second embodiment, and FIG. 4 is an enlarged perspective view of a main part. The air bag A2 of the second embodiment uses the relay connector 24, and at the same time, uses the buffer area 32.
Is different from the first embodiment only in that it has a T-shape, and the other configuration is the same as that of the first embodiment, and the same or corresponding parts are denoted by the same reference numerals.

[0024] That is, the divided opening 28 and the insertion hole both side welded portions 20 m ₂ at the periphery welded portion 20 m _1, the point which is located at the same position in the side direction of the resin sheet,
First, it is different from the first embodiment.

The inner end of the welding portion 20m ₂ on both sides of the insertion hole and the dividing opening 28 of the peripheral welding portion 20m ₁ are connected in series by a T-shaped buffer welding portion 20m ₄ . That is, both of the buffer welded portions 20m ₄ on both sides have a U-shape. The middle of the flow path of the air formed inside the T-shaped buffer welding portion 20m ₄ is caused by the peripheral welding portion 20m ₁ when the air bag A2 is inflated due to the air supply and pressurization.
A T-shaped buffer area 32 for allowing the division opening 28 to spread.

The effect of preventing the relay connector 24 from slipping out and preventing air leakage is exhibited in the same manner as in the first embodiment.

Third Embodiment FIG. 5 is a perspective view schematically showing an appearance of an air bag A3 for a cuff band of a sphygmomanometer according to a third embodiment, and FIG. 6 is an enlarged perspective view of a main part. The air bag A3 of the third embodiment has a structure in which the air tube 26 is directly joined and, at the same time, a crank-shaped buffer region 30 is formed similarly to the first embodiment. Without using the relay connector 24, the air tube 2
6 only in that it is configured to directly join
The third embodiment is different from the first embodiment, and the other configurations are the same as those of the first embodiment. The same or corresponding portions are denoted by the same reference numerals.

Before the high frequency welding of the two resin sheets 20a and 20b, the end 26a of the air tube 26 is sandwiched between the two resin sheets 20a and 20b at an appropriate location in the peripheral portion, and the high frequency welding is performed in this state.

[0029] That is, to form a perimeter welding portion 20 m _1, both the resin sheet 20a on both sides of the tube ends 26a, 20b if welded to the tube ends on both sides welded portion 20 m ₅ ungated a further two resin sheets 20a, 20
On both the front and back surfaces of b, a linear welded portion 20m ₆ is formed along the side direction of the sheet, and the resin welds 20a and 20b are welded together by the linear welded portion 20m ₆ . 20b are individually welded to the tube end 26a.

The series to connect the dividing aperture 28 of the inner end portion of the tube end sides welded portion 20 m ₅ and the peripheral portion welded portion 20 m ₁ with buffer welded portion 20 m ₃ of a crank shape, the flow channel middle of its inner The point that the buffer region 30 has a crank shape is the same as that of the first embodiment.

[0031] preventing the perforated separation and tube end 26a of the tube end sides welded portion 20 m ₅ and straight welded portion 20 m ₆ and it is possible to reliably prevent air leakage.

Fourth Embodiment FIG. 7 is a perspective view schematically showing the appearance of an air bag A4 for a sphygmomanometer cuff band according to a fourth embodiment, and FIG. 8 is an enlarged perspective view of a main part. The air bag A4 of the fourth embodiment has a T-shaped buffer region 32 formed in the same manner as in the second embodiment at the same time as directly joining the air tube 26. The air tube 26 is directly joined without using the relay connector 24.

That is, a straight welded portion 20m ₆ similar to that of the third embodiment is formed, and the two-side welded portion 20m ₅ and the straight welded portion 20m _{6 at} the tube end are prevented from peeling and the tube end 26a is perforated. The air leakage is prevented by prevention.

[0034]

According to the first air bag for the cuff band of the sphygmomanometer according to the present invention, after the peripheral portions of both resin sheets are welded in a state where the nozzle insertion hole is formed, one of the relay connectors is inserted into the nozzle insertion hole. In the type in which the nozzle portion is fitted and the air tube is connected to the other nozzle portion, the tensile force in the in-plane direction at the time of expansion is absorbed in the buffer region by expanding the dividing opening of the peripheral welded portion. As a result, it is possible to prevent a tensile force from being directly applied to the welded portion on both sides of the insertion hole, which is a welded portion between the nozzle portion and the two resin sheets, so that peeling of the welded portion on both sides of the insertion hole is prevented to prevent air leakage. It is possible to reliably prevent the relay connector and also prevent the relay connector from coming off.

According to the second air bag for the cuff band of the sphygmomanometer according to the present invention, the air tube is sandwiched between the two resin sheets to weld the peripheral portions of the two resin sheets, and at the same time, the air tubes are also made of the two resin sheets. In the type of welding, the tensile force in the plane direction at the time of expansion is absorbed in the buffer area by expanding the dividing opening of the peripheral welding part, and the welding part between the sheet parts on both sides of the tube end part Since it is possible to avoid that a tensile force is directly applied to the welded portions on both sides of the tube end portion and the welded portion between the tube end portion and each of the resin sheets, the peeling of the welded portions and the tube end portion are prevented. And air leakage can be reliably prevented.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a schematic appearance of an air bag for a cuff band of a sphygmomanometer according to a first embodiment of the present invention.

FIG. 2 is an enlarged perspective view of a main part of the air bag according to the first embodiment.

FIG. 3 is a perspective view showing a schematic appearance of an air bag for a sphygmomanometer cuff band according to a second embodiment of the present invention.

FIG. 4 is an enlarged perspective view of a main part of an air bag according to a second embodiment.

FIG. 5 is a perspective view showing a schematic appearance of an air bag for a sphygmomanometer cuff band according to a third embodiment of the present invention.

FIG. 6 is an enlarged perspective view of a main part of an air bag according to a third embodiment.

FIG. 7 is a perspective view showing a schematic appearance of an air bag for a sphygmomanometer cuff band according to a fourth embodiment of the present invention.

FIG. 8 is an enlarged perspective view of a main part of an air bag according to a fourth embodiment.

FIG. 9 is a perspective view showing a schematic appearance of an air bag for a blood pressure cuff band according to a first conventional example.

FIG. 10 is a perspective view showing a schematic appearance of an air bag for a blood pressure cuff band according to a second conventional example.

FIG. 11 is a perspective view showing a state where an air bag according to a second conventional example is inflated.

FIG. 12 is a sectional view of a main part of a second conventional example.

FIG. 13 is a perspective view showing a schematic appearance of an air bag for a blood pressure cuff band according to a third conventional example.

FIG. 14 is a perspective view showing a state where an air bag of a third conventional example is inflated.

FIG. 15 is a sectional view of a main part of a third conventional example.

[Explanation of symbols]

A1 to A4 Air bag 20a, 20b Resin sheet 20m ₁ Peripheral welded part 20m ₂ Insertion hole both-side welded part 20m ₃ Crank-shaped buffer welded part 20m ₄ T-shaped buffer welded part 20m ₅ Tube end both-side welded part 20m ₆ Linear welded portion 22 Nozzle insertion hole 24 Relay connector 24a, 24b Nozzle portion 26 Air tube 26a Tube end portion 28 Divided opening 30 Crank-shaped buffer region 32 T-shaped buffer region

Claims (2)

(57) [Claims] 1. Two resin sheets are superimposed on each other,
In a state in which a nozzle insertion hole communicating with the inside and outside is formed at an appropriate position in the peripheral portion of both resin sheets, the peripheral portion of both resin sheets and both sides of the nozzle insertion hole are welded, and in this welding, the peripheral portion is welded. Such that the dividing opening of the welding portion and the inner end of the welding portion on both sides of the insertion hole are connected in the middle of a flow path connecting them in a state of forming a buffer region for allowing expansion of the dividing opening at the time of expansion during expansion. A series of connections are made via a buffer welding portion, and one nozzle portion of the relay connector is inserted and fitted into the nozzle insertion hole in close contact, and an air tube is connected to the other nozzle portion of the relay connector. An air bag for a sphygmomanometer cuff band, characterized in that the air bag is configured to perform the following. 2. The method according to claim 1, wherein the two resin sheets are overlapped with each other,
With the ends of the air tube sandwiched between appropriate portions of the peripheral portions of the resin sheets, the peripheral portions of the resin sheets and the sheet portions on both sides of the tube end are welded to each other, and the tube end and each resin In this welding, the split opening of the peripheral welded portion and the inner end of the welded portion on both sides of the tube end are expanded at the time of expansion in the middle of the flow path connecting them. An air bag for a sphygmomanometer cuff band, wherein the air bags are connected in series through a buffer welded portion which is connected in a state where a buffer region for allowing the pressure is formed.