JP2010167052A - Breast pump for mother's milk - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a breast pump 10 for mother's milk capable of preventing the occurrence of nipple trouble caused by an excessive rise in negative pressure. <P>SOLUTION: The breast pump 10 for mother's milk includes an outer cylinder 12 opened at both ends thereof and an inner cylinder 11 which is opened at both end parts thereof and of which one end opening 11a is formed into a trumpet shape capable of being brought into pressure contact with the breast so as to cover a nipple and constituted so that the inner cylinder 11 is airtightly fitted in the outer cylinder 12 in an accessible manner to define a mother's milk storage part 16 by the outer cylinder 12 and the inner cylinder 11, the trumpet-shaped opening 11a of the inner cylinder 11 is protruded from one end opening of the outer cylinder 12 and a main check valve 13c, which prevents the air from flowing into the mother's milk storage part 16 from the outside thereof and permits the outflow of air from the inside of the mother's milk storage part 16 to the outside, is provided at the other end opening 12b of the outer cylinder 12. This breast pump is also provided with a sub-check valve 13g which prevents the outflow of air from the inside of the mother's milk storage part 16 to the outside and is opened when the pressure in the mother's milk storage part 16 has a predetermined negative pressure or more to permit the open air to flow into the mother's milk storage part. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a breast pump.

  As one type of breast milking machine, Japanese Utility Model Publication No. 55-28271 is provided with an outer cylinder having both ends opened, and an inner cylinder formed in a trumpet shape having both ends opened and one end opening can be placed on the nipple. A breast pump is disclosed. In this breast pump, the inner cylinder is fitted into the outer cylinder in an airtight and detachable manner, and the trumpet mouth of the inner cylinder is protruded from one end opening of the outer cylinder. A check valve is provided at the other end opening of the outer cylinder to prevent the inflow of air from the outside to the inside of the inner cylinder and to allow the outflow of air from the inside of the inner cylinder to the outside.

  According to the conventional breast pump described above, when the trumpet mouth of the inner cylinder is pressed against the breast so as to cover the nipple and the outer cylinder is pulled to pull out the inner cylinder from the outer cylinder, the inner cylinder and the outer cylinder are partitioned. The volume of the breast milk reservoir increases and negative pressure is generated here. This negative pressure acts on the nipple to suck the breast milk into the breast milk reservoir. When the inner cylinder is pulled out from the outer cylinder, the check valve closes and acts to prevent air from flowing into the breast milk reservoir from the outside.

  Subsequently, when the drawn inner cylinder is pushed into the outer cylinder, the check valve is opened, and the breast milk is discharged from the breast milk reservoir through the check valve to the outside.

Japanese Utility Model Publication No. 55-28271

In the conventional breast pump described above, the negative pressure generated in the milk storage part is applied to the nipple to suck the milk. However, if the negative pressure is too high, the nipple is congested and inflamed, or the milk duct However, there is a problem that it becomes a cause of a teat trouble such that the milk becomes thin and obstructs the distribution of milk and the milking becomes impossible.
An object of this invention is to provide the breast milk pump which can prevent that a negative pressure becomes excessive and a teat trouble generate | occur | produces in view of this problem.

  The invention according to claim 1 causes the negative pressure generated in the breast milk storage part to act on the nipple to suck the breast milk from the nipple into the breast milk storage part, and prevents the inflow of air from the outside to the inside of the breast milk storage part, A breast pump configured to discharge breast milk from the breast milk reservoir through a main check valve that allows air to flow from the inside to the outside of the breast milk reservoir, and the air from the inside of the breast milk reservoir to the outside An auxiliary check valve is provided which prevents the outflow of the milk and opens when the breast milk storage part exceeds a predetermined negative pressure and allows the outside air to flow into the breast milk storage part.

  The invention according to claim 2 includes an outer cylinder having both ends opened, and an inner cylinder having both ends opened and a one-end opening formed in a trumpet shape that can be pressed against the breast so as to cover the nipple. The inner cylinder is fitted in an airtight and removable manner to partition the breast milk storage portion with the outer cylinder and the inner cylinder, and the trumpet port of the inner cylinder protrudes from one end opening of the outer cylinder, and the breast milk enters the other end opening of the outer cylinder A breast milk pump provided with a main check valve that prevents the inflow of air from the outside to the inside of the reservoir and allows the outflow of air from the inside of the breast milk reservoir to the outside, wherein the inside of the breast milk reservoir An auxiliary check valve is provided that prevents the air from flowing out to the outside and opens when the breast milk storage part exceeds a predetermined negative pressure and allows outside air to flow into the breast milk storage part.

  The invention according to claim 3 is the breast milking apparatus according to claim 2, wherein the main check valve is composed of a cap provided with a hollow protrusion made of soft rubber and having a main slit formed at the tip of the hollow protrusion. The cap is covered with the other end opening of the outer cylinder, and the main slit is closed when the inner cylinder is pulled out from the outer cylinder, and the main slit is opened when the inner cylinder is pushed into the outer cylinder, A main air passage that is connected to the inside and outside of the main check valve formed in the main check valve, and a semi-circular hollow convex portion that is formed to protrude outward from the main air passage so as to cover the inner end opening of the main air passage. And a sub-slit that opens when the breast milk reservoir reaches a predetermined negative pressure or higher is formed at the top of the hollow convex portion.

  According to a fourth aspect of the present invention, in the breast pump according to the third aspect, a flange can be formed on the main check valve, and the bottle can be fastened to the bottle opening of the baby bottle at the other end opening of the outer cylinder. A ring screw lid is provided, and when the ring screw lid is fastened to the bottle mouth, the flange is sandwiched between the back surface of the ring screw lid and the upper end of the bottle mouth, and the sub-port that communicates the inside and outside of the bottle mouth with the flange. An air passage is formed.

  According to the first aspect of the present invention, when the breast milk storage part becomes equal to or higher than the predetermined negative pressure, the auxiliary check valve opens and the outside air is introduced into the breast milk storage part, so that the negative pressure in the breast milk storage part is reduced. This prevents excessive negative pressure from acting on the breast or nipple and causing nipple troubles.

According to the second aspect of the present invention, when the trumpet mouth of the inner cylinder is pressed against the breast so as to cover the nipple, and the inner cylinder is pulled out from the outer cylinder, the volume of breast milk storage divided by the inner cylinder and the outer cylinder Expands and negative pressure is generated here. This negative pressure acts on the nipple to suck the breast milk into the breast milk reservoir. When the inner cylinder is pulled out from the outer cylinder, the main check valve acts to prevent air from flowing into the breast milk storage portion from the outside.
Subsequently, when the drawn inner cylinder is pushed into the outer cylinder, the main check valve is opened, and the breast milk is discharged from the breast milk reservoir through the main check valve.
Therefore, according to the present invention, when the negative pressure generated in the breast milk reservoir when the inner cylinder is pulled out from the outer cylinder is equal to or greater than a predetermined negative pressure, the secondary check valve is opened and the outside air is introduced into the breast milk reservoir. The negative pressure in the breast milk reservoir is reduced and does not exceed the predetermined negative pressure. Therefore, it is possible to prevent nipple trouble from occurring due to excessive negative pressure acting on the breast and nipple.

According to the third aspect of the present invention, when the inner cylinder is pulled out from the outer cylinder and the breast milk is sucked from the nipple into the breast milk storage section, the main slit of the cap-shaped main check valve is closed so that the breast milk storage section is externally closed. It acts to prevent the inflow of air.
On the other hand, when the drawn-out inner cylinder is pushed into the outer cylinder and breast milk is discharged from the breast milk reservoir, the main slit of the main check valve opens, and the breast milk is discharged from the breast milk reservoir through the main slit to the outside.
If the negative pressure generated in the breast milk reservoir when the inner cylinder is pulled out from the outer cylinder exceeds the predetermined negative pressure, the secondary slit of the secondary check valve opens and the outside air is introduced into the breast milk reservoir through the main air passage. The negative pressure in the breast milk reservoir is reduced.
Thus, according to the present invention, since the main check valve and the sub check valve have an integral structure, the structure is simplified and the manufacturing cost of the breast pump can be reduced.

According to the invention described in claim 4, by tightening the ring screw lid to the bottle mouth, the breast pump can be attached to the baby bottles, and the mother milk can be injected into the baby bottles from the breast milk reservoir.
Therefore, according to the present invention, when the breast pump is attached to the baby bottle, the outside air is introduced into the baby bottle through the auxiliary air passage, so that the negative pressure of the breast milk storage portion becomes equal to or higher than the predetermined negative pressure. When this happens, outside air flows from the inside of the baby bottle through the auxiliary slit of the auxiliary check valve to the breast milk reservoir, and the negative pressure is reduced. Therefore, it is possible to prevent an excessive negative pressure from acting on the breast or nipple.

It is sectional drawing which shows the breast milk pump which concerns on a present Example. It is a top view of the valve body which shows the valve body of the breast milking machine. It is a side view which shows the valve body. It is a bottom view which shows the same valve body. FIG. 5 is a cross-sectional view taken along line AA in FIG. 4. FIG. 5 is a sectional view taken along line BB in FIG. 4. It is CC sectional view taken on the line of FIG.

  The present invention will be described with reference to the drawings. FIG. 1 shows a breast pump according to an embodiment of the present invention. The breast pump 10 includes an inner cylinder 11 and an outer cylinder 12 which are hard plastic molded products, and a valve body 13 made of soft plastic rubber.

  Both ends 11a and 11b of the inner cylinder 11 are formed as openings, and the one end opening 11a is formed in a trumpet shape so as to be pressed against the breast so as to cover the nipple. One ring protrusion 11c is formed at the base end of the trumpet mouth 11a. Is formed. Further, two ring ridges 11e and 11d are formed on the outer peripheral portion of the inner cylinder 11 on the other end opening 11b side, and a packing 14 is mounted between the ring ridges 11e and 11d.

  Both ends 12a and 12b of the outer cylinder 12 are formed as openings, the inner cylinder 11 is inserted from the one end opening 12a, and the trumpet 11a of the inner cylinder 11 protrudes from the one end opening 12a. A ring screw lid 12 c that can be fastened to the bottle mouth 15 a of the baby bottle 15 is integrally formed at the peripheral edge of the other end opening 12 b of the outer cylinder 12. A detachable stopper ring 17 is engaged with the outer peripheral portion of the one end opening 12a of the outer cylinder.

  The inner cylinder 11 can be inserted into and removed from the one end opening 12 a of the outer cylinder 12 and is hermetically fitted by the packing 14, and the pushing stroke end of the inner cylinder 11 is protruded from the one end opening end 12 a of the outer cylinder 12 and the ring protrusion of the inner cylinder 11. It is regulated by contact with the strip 11c. Further, the end of the inner stroke of the inner cylinder 11 is regulated by the contact between the ring ridge 11 d and the claw 17 a of the stopper ring 17.

  Details of the valve body 13 are shown in FIGS. 2 is a plan view of the valve body, FIG. 3 is a side view of the valve body, FIG. 4 is a bottom view of the valve body, FIG. 5 is a cross-sectional view taken along the line AA of FIG. FIG. 7 is a sectional view taken along line C-C in FIG. As shown in FIGS. 2 to 7, the valve body 13 has a flange 13 a, a ring surface 13 b inside the flange 13 a, and a hollow protrusion 13 c having an inverted triangular section, and the flange 13 a, the ring surface 13 b, and the hollow protrusion The cap structure which shape | molded 13c continuously is provided. The hollow protrusion 13c protrudes from the ring surface 13b to the opposite flange side 13a, and one main slit 13e is formed at the protrusion tip 13d. The hollow protrusion 13c constitutes a main check valve in the present invention.

  As shown in detail in FIG. 5, an air introduction portion 13 f having a circular cross section is formed at one place on the ring surface 13 b, and a hollow convex portion 13 g having a semicircular cross section is integrally formed at the inner end of the cap of the air introduction portion 13 f. The opening of the air introduction part 13f is covered. One sub slit 13h is formed at the top of the hollow convex portion 13g. The hollow convex portion 13g and the air introduction portion 13f constitute a sub check valve and a main air passage in the present invention, respectively. In addition, grooves 13i having a semicircular cross section are formed at two locations on the back surface of the flange 13a. This groove 13i constitutes a sub air passage in the present invention.

  The structure of the breast pump 10 according to the present embodiment is as described above. When breast milk is stored in the baby bottle 15, the ring screw lid 12c is fastened to the bottle mouth 15a of the baby bottle 15, and the flange 13a of the valve body 13 is attached. The ring screw lid 12c is sandwiched between the back surface and the upper end of the bottle mouth 15a of the baby bottle 15, and the valve body 13 covers the other end opening 12b of the outer cylinder 12 as a sub lid. In this way, the breast pump 10 is attached to the baby bottle 15. Even if the ring screw lid 12c is fastened to the bottle mouth 15a, the inside and outside of the baby bottle 15 communicate with each other by the groove 13i, so that the outside air is introduced into the baby bottle 15.

  When the breast pump 10 is attached to the baby bottle 15 with the ring screw lid 12c, the trumpet mouth 11a of the inner cylinder 11 is pressed against the breast so as to cover the nipple, and the outer cylinder 12 is pulled to remove the inner cylinder 11 from the outer cylinder 12. When pulled out, the volume of the breast milk storage section 16 partitioned by the inner cylinder 11 and the outer cylinder 12 is expanded, and a negative pressure is generated here. This negative pressure acts on the nipple and sucks the breast milk into the breast milk reservoir 16.

  When the inner cylinder 11 is pulled out from the outer cylinder 12, the main slit 13e formed at the protrusion tip 13d of the hollow protrusion 13c of the valve body 13 is closed by the elasticity of soft plastic rubber, so that the hollow protrusion that is the main check valve 13d acts to prevent air from flowing from the baby bottle 15 into the breast milk reservoir 16. Further, since the auxiliary slit 13h of the hollow convex portion 13g is also closed by the elasticity of the soft plastic rubber within the predetermined negative pressure of the breast milk storage portion 16, the hollow convex portion 13g as the auxiliary check valve is introduced into the air from the baby bottle 15. Air is prevented from flowing into the breast milk reservoir 16 through the portion 13f.

  Subsequently, when the drawn inner cylinder 11 is pushed into the outer cylinder 12, the main slit 13e is opened by air pressure, and breast milk is injected from the breast milk reservoir 16 through the main slit 13e into the baby bottle 15.

  When the negative pressure generated in the breast milk storage part 16 when the inner cylinder 11 is pulled out from the outer cylinder 12 becomes a predetermined negative pressure or more, the sub slit 13h of the hollow convex part 13g opens, passes through the air introduction part 13f, and the breast milk storage part 16 Since outside air is introduced into the body, the negative pressure in the breast milk storage unit 16 is reduced and does not exceed the predetermined negative pressure. Therefore, it is possible to prevent nipple trouble from occurring due to excessive negative pressure acting on the breast and nipple.

  In addition, the breast milking device 10 according to the present embodiment has a hollow projecting portion 13c that is a main check valve and a hollow convex portion 13g that is a sub-check valve, so that the structure is simplified and the breast milking device 10 is simplified. The manufacturing cost can be reduced.

  If the negative pressure in the breast milk reservoir increases, the airtightness of the main check valve increases proportionally.However, the sub check valve introduces air from the outside air to increase the pressure when the negative pressure exceeds the specified negative pressure. There is an effect to keep the pressure constant. For this reason, the predetermined negative pressure of the breast milk storage part is determined by each element of the thickness, hardness, and slit length of the hollow convex part. A predetermined negative pressure is set by adjusting each of these elements during manufacturing.

  In addition, the breast pump 10 according to the present embodiment is attached to the baby bottle 15 as an example. For example, the ring screw cap is fastened to one end of an intermediate tube having both ends opened and a screw is formed around each opening. It is also possible to mount a resin film bag as disclosed in Japanese Patent Publication No. 6-8140 in the opening and store breast milk in this bag.

DESCRIPTION OF SYMBOLS 10 ... Breast milking machine 11 ... Inner cylinder 11a ... Trumpet mouth 11b ... Other end opening 12 ... Outer cylinder 12a ... One end opening 12b ... Other end opening 13 ... Valve body 13a ... Flange 13b ... Ring surface 13c ... Hollow protrusion (main check) valve)
13d ... Projection tip 13e ... Main slit 13f ... Air conduction part (main air passage)
13g ... hollow convex part (sub check valve)
13h ... sub slit 13i ... groove (sub air passage)
15 ... Feeding bottle 16 ... Breast milk reservoir 17 ... Stopper ring

Claims (4)

  The negative pressure generated in the breast milk reservoir is applied to the nipple to suck the breast milk from the nipple into the breast milk reservoir, preventing the inflow of air from the outside of the breast milk reservoir to the inside of the breast milk reservoir. A breast pump configured to discharge milk from a breast milk reservoir to the outside through a main check valve that allows the outflow of air, and prevents the outflow of air from the inside of the breast milk reservoir to the breast milk reservoir A breast milk pump comprising a secondary check valve that opens when the air pressure exceeds a predetermined negative pressure and allows outside air to flow into the breast milk reservoir.   Equipped with an outer cylinder with both ends open, and an inner cylinder with both ends open and a trumpet-shaped inner cylinder that can be pressed against the breast to cover the nipple. And the outer cylinder and the inner cylinder divide the breast milk storage part, the trumpet mouth of the inner cylinder protrudes from one end opening of the outer cylinder, and the air from the outside of the breast milk storage part to the other end opening of the outer cylinder A breast pump provided with a main check valve that allows outflow of air from the inside of the breast milk reservoir to the outside, and prevents outflow of air from the inside of the breast milk reservoir to the outside The breast milk pump is provided with a secondary check valve that opens when the breast milk storage unit becomes a predetermined negative pressure or higher and allows outside air to flow into the breast milk storage unit.   The main check valve comprises a cap having a hollow protrusion made of soft rubber and having a slit formed at the tip of the hollow protrusion, covering the other end opening of the outer cylinder with the cap, and the inner cylinder from the outer cylinder The slit is closed when pulled out, and the slit is opened when the inner cylinder is pushed into the outer cylinder, and the sub check valve is connected to the main check valve formed in the main check valve. A hollow convex part with a semicircular cross section formed to protrude outside the main air path so as to cover the inner end opening of the main air path, and a slit that opens when the breast milk reservoir reaches a predetermined negative pressure or more at the top of the hollow convex part 3. The breast pump according to claim 2, wherein the breast pump is formed.   A flange is formed on the main check valve, and a ring screw lid that can be fastened to a bottle mouth of a baby bottle is provided at the other end opening of the outer cylinder, and when the ring screw lid is fastened to the bottle mouth, 4. The breast pump according to claim 3, wherein the flange is sandwiched between the back surface and the upper end of the bottle mouth, and a secondary air passage is formed in the flange to communicate the inside and outside of the bottle mouth.

Images