JPH05154114A - Air bag for cuff band of hemodynamometer - Google Patents

Abstract

PURPOSE:To prevent the generation of air leakage when the air bag is inflated and to prevent the pull-out of a junction connector. CONSTITUTION:Two sheets of resin sheets 20a, 20b are superposed on each other. The peripheral parts of the two resin sheets 20a, 20b and both sides of a nozzle insertion port 22 are welded in the state of forming the nozzle insertion port 22 communicating with the inside and outside in the peripheral parts of the two resin sheets 20a, 20b. In addition, a parting aperture 28 of the welded part 20m1 of the peripheral parts and the inside end of both welded parts 20m2 of the insertion hole are connected in series via such a buffer welded part 20m3 as to connect these parts in the state of forming a buffer region 30 in order to permit the spread of the parting aperture 28 at the time of expansion on the way to the flow passage connecting these parts in this welding. The one nozzle part 24a of the junction connector 24 is inserted and fitted into the nozzle insertion port 22 and an air tube 26 is connected to the other nozzle part 24b of the junction connector 24.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sphygmomanometer cuff which is used for measuring a blood pressure by wrapping it around a measured part of the body such as an upper arm and supplying air to pressurize the measured part. The present invention relates to an air bag for a sphygmomanometer cuff band, which is 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 blood pressure cuff band shown in FIG.
Prepares two rectangular resin sheets 2a and 2b, and the relay connector 4 is provided in advance in the central portion of one resin sheet 2a.
Is welded at high frequency, then both resin sheets 2a, 2
b are overlapped with each other and the peripheral portions thereof are high-frequency welded all around, and a rubber air tube 6 is inserted and connected to the nozzle portion of the relay connector 4.

In this type of air bag A5, the relay connector 4 is located in the central portion of the resin sheet irrespective of the peripheral welded portion 2m ₁ , so that the relay connector 4 is relayed when inflated by air pressure. A large pulling force does not act on the connector 4, and air leakage at the relay connector 4 portion rarely occurs. Further, since the welded portion 2m ₁ is a completely closed loop, no air leaks from the welded portion 2m ₁ .

On the other hand, however, since the relay connector 4 is welded, the number of processing steps increases and the cost tends to increase. That is, the step of forming the insertion hole in the resin sheet 2a, the step of inserting the relay connector 4 into the insertion hole, and the relay connector 4 in the small range and carefully
This is because a step of welding and the like is required.

On the other hand, the air bags A6 and A7 shown in FIGS. 10 and 13 have two resin sheets 2a,
In the peripheral portion of 2b, in A6, the relay connector is fitted in the nozzle insertion hole formed at the same time as the high frequency welding of the peripheral portion, and in A7, the air tube is also welded at the same time as the high frequency welding of the peripheral portion. It is cost effective.

The air bag A6 of 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 of the peripheral portions of the two resin sheets 2a and 2b. It is formed at the same time (see (a) of FIG. 12), the nozzle portion 8a of the relay connector 8 is fitted into the nozzle insertion hole 10 in a close contact state, and the air tube 6 is connected to the other nozzle portion 8b. Is. Welded portion 2m ₂ of the peripheral portion is divided at a position of the relay connector 8, the welded portion 2m ₃ extending in the sheet edge on both sides of the nozzle insertion hole 10
Has become.

In the air bag A7 of FIG. 13, when the two resin sheets 2a and 2b are superposed, the end portion 6a of the air tube 6 is sandwiched and the peripheral portion is welded at a high frequency all around. Both resin sheets 2a and 2b are integrally joined by a welded portion 2m _{4 at} a position other than the tube end portion 6a. At the tube end 6a, as shown in FIG. 15 (a), both resin sheets 2a and 2b are integrally joined to the tube end 6a, not to the other side.

[0008]

In the case of the air bag A6 of FIG. 10, when expanded by air supply pressure as shown in FIG. 11, both resin sheets 2a and 2b separate from each other and the welded portion 2m ₂ , A tensile force in the direction away from 2 m _{3 is} received along the seat surface direction. Relay connector 8
Looking at the pulling force in the vicinity of, a radial pulling force as indicated by the arrow in FIG. 11 is received. Then, as shown in FIG. 12B, the welded portions 2m ₃ on both sides of the nozzle insertion hole 10 are pulled by the welded portions 2m _{2 in the} peripheral portion, and the nozzle insertion hole 10 expands to relay the welded portion 2m _3. It comes to be separated from the nozzle portion 8a of the connector 8. 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 of FIG. 13, when it is inflated by air supply pressure as shown in FIG. 14, both resin sheets 2a and 2b receive a pulling force in the vicinity of the air tube 6 as described above. Looking at the pulling force, it receives a discharge-like pulling force as indicated by an arrow in FIG. Then, as shown in FIG. 15B, the pulling force is concentrated on the tube end portion 6a and a hole is formed, which may cause air leakage.

The present invention was devised in view of such circumstances, and on the premise that it is a type sandwiched between two resin sheets from the viewpoint of cost, when expanding due to air supply pressurization, In addition to preventing air leakage,
The purpose is to prevent the relay connector from coming off.

[0011]

A first sphygmomanometer cuff band air bag according to the present invention has two resin sheets superposed on each other, and communicates with the inside and the outside at appropriate places around the both resin sheets. In a state of forming a nozzle insertion hole to be welded, the peripheral portions of the both resin sheets and both sides of the nozzle insertion hole are welded,
Also, in this welding, the dividing opening of the peripheral welding portion and the inner ends of the insertion portions on both sides of the insertion hole, a buffer region for allowing the expansion of the dividing opening at the time of expansion in the flow path connecting them. The nozzles of one of the relay connectors are closely connected to each other through the above-described nozzle insertion holes while being connected in series through the buffer welded portions that are in contact with each other in the formed state, and the other of the relay connectors is connected. It is characterized in that an air tube is connected to the nozzle portion of the above.

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

[0013]

According to the first air bag for the sphygmomanometer cuff band, since the buffer region formed by the buffer welding portion exists, each resin sheet is expanded along the surface direction when inflated by the air supply pressure. Even if it is pulled, the dividing opening of the peripheral welding part is expanded so that the pulling force is absorbed in the buffer area, and the pulling force is the welding part between the nozzle part of the relay connector and both resin sheets. Avoid directly joining the welds on both sides of the hole.

Further, according to the air bag for the second sphygmomanometer cuff band, since the buffer region formed by the buffer welding portion is present as in the above, the pulling force in the surface direction at the time of expansion is applied to the peripheral welding portion. Since the dividing opening of the tube is absorbed in the buffer area by expanding it, the pulling force of the tube ends is the welding part between the sheet parts on both sides of the tube end. It is avoided that the sheet is directly joined to the welded portion.

[0015]

Embodiments of the air bag for a blood pressure monitor cuff band according to the present invention will be described in detail below with reference to the drawings.

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

In the figure, 20a and 20b are two resin sheets superposed on each other, and 20m ₁ is integrally joined by high frequency welding over the entire circumference except at a suitable one of the peripheral portions of both resin sheets 20a and 20b. The peripheral welding portion 22 is a nozzle insertion hole 22 formed so as to communicate with the inside and outside of the peripheral portions of both resin sheets 20a and 20b, and 24 is one of the nozzle portions 24a inserted into the nozzle insertion hole 22 and fitted. The relay connector 26 is a rubber air tube connected to the other nozzle portion 24b of the relay connector 24.

The nozzle insertion hole 22 is formed by high-frequency welding both resin sheets 20a, 20b on both sides thereof. This welded portion is the welded portion 20 on both sides of the insertion hole.
m ₂ . One nozzle portion 24a of the relay connector 24
Is bite into the welded portions 20m ₂ on both sides of the insertion hole and is fitted in an airtight manner.

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

The inner ends of the welded portions 20m ₂ on both sides of the insertion hole and the dividing openings 28 of the peripheral welded portion 20m ₁ are connected in series by a crank-shaped buffer welded portion 20m ₃ . And this crank-shaped buffer welded part 20m
_The middle of the air flow path formed inside ₃ serves as a buffer area 30 for allowing the expansion of the dividing opening 28 of the peripheral welded portion 20m ₁ when the air bladder A1 is inflated due to air supply pressurization. There is.

According to the air bag A1, since the buffer region 30 formed by the crank-shaped buffer welded portion 20m ₃ is present, the pulling force in the surface direction at the time of expansion can spread the dividing opening 28. Since it is absorbed in the crank-shaped buffer region 30, the nozzle portion 24a of the relay connector 24 and both resin sheets 20
Insertion holes on both sides of the welding portion 20m ₂
It is possible to prevent the pulling force from being directly applied to.

By this absorbing action of the pulling force, it is possible to prevent the welded portions 20m ₂ on both sides of the insertion hole from being peeled off. Therefore, it is possible to prevent not only the relay connector 24 from coming off but also the air leakage.

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 according to the second embodiment uses the relay connector 24, and at the same time, has a buffer area 32.
Is different from that of the first embodiment only in that it has a T shape, and the other configurations are similar to those of the first embodiment, and the same or corresponding portions are denoted by the same reference numerals.

That is, the dividing opening 28 in the peripheral welded portion 20m ₁ and the insertion hole both-side welded portion 20m ₂ are located at the same position in the side direction of the resin sheet.
First, it differs from the first embodiment.

The inner end of the welded portion 20m ₂ on both sides of the insertion hole and the dividing opening 28 of the peripheral welded portion 20m ₁ are connected in series by a T-shaped buffer welded portion 20m ₄ . That is, the buffer welded portions 20m ₄ on both sides are both U-shaped. The middle portion of the air passage formed inside the T-shaped buffer welded portion 20m ₄ is welded to the peripheral welded portion 20m ₁ when the air bag A2 is inflated due to air supply pressurization.
The T-shaped buffer region 32 is provided to allow the expansion of the dividing opening 28.

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

Third Embodiment FIG. 5 is a perspective view showing a schematic appearance of an air bag A3 for a sphygmomanometer cuff band according to a third embodiment, and FIG. 6 is an enlarged perspective view of a main part. In the air bag A3 of the third embodiment, the air tube 26 is directly joined, and at the same time, a crank-shaped buffer region 30 is formed as in the first embodiment. Air tube 2 without using the relay connector 24
First, only in that the 6 is directly joined.
The present embodiment is different from the embodiment, and the other structure is the same as that of the first embodiment, and the same or corresponding parts are denoted by the same reference numerals.

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

That is, the peripheral welded portion 20m ₁ is formed, and the resin sheets 20a and 20b on both sides of the tube end portion 26a are welded to each other to form the welded portion 20m ₅ on both sides of the tube end portion. 20a, 20
On each of the front and back sides of b, a straight line welded portion 20m ₆ is formed along the side direction of the sheet, and the straight line welded portion 20m ₆ welds both resin sheets 20a, 20b to each other. Each 20b is individually welded to the tube end 26a.

The inner end of the welded portion 20m ₅ on both sides of the tube end and the dividing opening 28 of the peripheral welded portion 20m ₁ are connected in series by a crank-shaped buffer welded portion 20m ₃ , and the inside of the flow path is in the middle thereof. The crank-shaped buffer area 30 is the same as in the first embodiment.

It is possible to reliably prevent air leakage by preventing peeling of the welded portions 20m ₅ on both sides of the tube end and the straight welded portion 20m ₆ and perforation of the tube end 26a.

Fourth Embodiment FIG. 7 is a perspective view showing the schematic 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 the main part. In the air bag A4 of the fourth embodiment, the air tube 26 is directly joined, and at the same time, a T-shaped buffer region 32 is formed as in the second embodiment. The air tube 26 is directly joined without using the relay connector 24.

That is, the same straight line welded portion 20m ₆ as in the third embodiment is formed, and the tube end portion both side welded portions 20m ₅ and the straight line welded portion 20m ₆ are prevented from peeling and the tube end portion 26a is perforated. Preventing air leaks.

[0034]

According to the first air bag for the blood pressure monitor cuff band of 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 part of (1) is fitted and the air tube is connected to the other nozzle part, the pulling force in the surface direction at the time of expansion is absorbed in the buffer region by expanding the dividing opening of the peripheral welding part. This prevents the tensile force from being directly applied to the welded parts on both sides of the insertion hole, which is the welded part between the nozzle part and both resin sheets. This can be surely prevented, and the relay connector can be prevented from coming off.

Further, according to the second air bag for the blood pressure monitor cuff band of the present invention, the air tube is sandwiched between both resin sheets and the peripheral portions of both resin sheets are welded, and at the same time, the air tube is made of both resin sheets. In the case of the type that is welded to, the pulling force in the surface direction during expansion is absorbed in the buffer region by expanding the dividing opening of the peripheral welded part, and the welded part between the sheet parts on both sides of the tube end part is absorbed. It is possible to prevent the pulling force from being directly applied to the welded portions on both sides of the tube end portion and the welded portions of the tube end portion and each resin sheet. It is possible to reliably prevent air leakage by preventing perforation.

[Brief description of drawings]

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

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

FIG. 3 is a perspective view showing a schematic external 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 external 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 external 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 external appearance of an air bag for a sphygmomanometer cuff band according to a first conventional example.

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

FIG. 11 is a perspective view showing a state in which the air bag of the second conventional example is inflated.

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

FIG. 13 is a perspective view showing a schematic external appearance of an air bag for a sphygmomanometer 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 cross-sectional view of a main part of a third conventional example.

[Explanation of symbols]

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

Claims (2)

[Claims] 1. A stack of two resin sheets,
The peripheral portions of both resin sheets and both sides of the nozzle insertion hole are welded in a state where the nozzle insertion holes that communicate with the inside and outside are formed at appropriate positions in the peripheral portions of the both resin sheets, and in this welding, the peripheral portion The dividing opening of the welded portion and the inner ends of the welded portions on both sides of the insertion hole are connected in a state in which a buffer region for allowing the expansion of the dividing opening at the time of expansion is formed in the middle of the flow path connecting them. It is connected in series through the buffer welding part, and one nozzle part of the relay connector is inserted and fitted in the nozzle insertion hole in a close contact state, and the air tube is connected to the other nozzle part of the relay connector. An air bag for a sphygmomanometer cuff that is configured to be. 2. Two resin sheets are superposed on each other,
While sandwiching the ends of the air tubes at appropriate places in the peripheral portions of the both resin sheets, the peripheral portions of the both resin sheets and the sheet portions on both sides of the tube end are welded together and the tube end portion and each resin are welded. Each sheet is welded, and in this welding, the dividing opening of the peripheral welding portion and the inner ends of the tube end portion both side welding portions spread in the middle of the flow path connecting them when the dividing opening expands. A bladder for a sphygmomanometer cuff band, which is connected in series through a buffer welded portion which is connected in a state of forming a buffer region for allowing the above.