JP4080150B2 - Pulsating breast pump - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a breast pump for milking breast milk, and more particularly to a pulsating breast pump capable of performing a pulsating operation with a simple configuration.
[0002]
[Prior art]
Conventionally, as this type of pulsating breast pump, for example, the one described in Japanese Patent Publication No. 3-62106 by the present applicant is known.
In other words, this breast pump is provided with pressure adjusting means including valve means that reciprocates in a hood having an opening for hitting the breast.
[0003]
And if the negative pressure in a hood becomes large by evacuating the inside of the hood, the inside of the hood is opened to the atmosphere by the operation of the valve body.
By repeating this operation, breast milk can be sucked in a pulsating manner, and the pulsation pressure can be changed by adjusting the operating torque of the valve body. Is.
[0004]
[Problems to be solved by the invention]
However, in such a conventional pulsating breast pump, since the valve means for directly opening and closing the space inside the hood and the outside space is used, the amount of air flowing in when the air is released is not constant, and the precision There is a problem that proper pressure adjustment is difficult.
In other words, the amount of air flowing into the negative pressure space such as in the hood is related to the change in the negative pressure during pulsation. Irritation will become bigger.
[0005]
In addition, in a conventional breast pump, providing a mechanism for adjusting the operating torque of the valve body of the pressure adjusting means complicates the structure of the pressure adjusting means, causing failure, and for unfamiliar mothers etc. Therefore, there is a drawback that it is difficult to adjust to a pressure suitable for the self.
[0006]
The present invention has been made to solve such a problem, and an object thereof is to provide a pulsating breast pump capable of reducing a pressure change in pulsation and realizing a pressure change that is not unreasonable for use.
[0007]
[Means for Solving the Problems]
According to the first aspect of the present invention, there is provided a pulsating breast pump provided with a negative pressure forming space in which a negative pressure is formed by a vacuuming means in a state in which the opening of the hood is closed. A small room provided between the external space and the external space, a small chamber opening and closing means for opening and closing the external space and the small room, and an internal opening and closing means for opening and closing the small room and the negative pressure forming space , By adopting a configuration in which the small room opening and closing means and the internal opening and closing means are alternatively opened and closed, When the negative pressure in the negative pressure forming space becomes a certain level or more in a state in which the vacuuming means is continuously sucked, Periodically By guiding the air in the small room to the negative pressure forming space, Adjust to reduce pressure change This is achieved by a pulsating breast pump having negative pressure adjusting means configured.
[0008]
According to the configuration of the first aspect, the small chamber is provided between the negative pressure forming space and the external space, and air flows into the negative pressure forming space through the small chamber. As a result, the amount of air flowing into the negative pressure forming space when the pressure changes during the pulsation operation can be limited by the size of the small room. For this reason, compared to the case where the negative pressure is increased and the air is directly released to the outside, the amount of air flowing in is small and constant, so that the pressure change in the pulsation operation can be reduced and stable. Can be made.
Therefore, unlike the conventional case, the user does not feel pain due to a large pressure change, and the pressure change is also constant. In this respect as well, unexpected pain and discomfort due to unstable pressure change can be avoided. Can be prevented.
[0009]
According to a second aspect of the present invention, in the configuration of the first aspect, the internal space of the hood communicates with the negative pressure forming space, and the negative pressure adjusting means is provided in the hood.
According to the configuration of claim 2, since the negative pressure adjusting means is provided in the hood portion, for example, not in the main body incorporating the vacuum evacuating means or the like, the configuration becomes simple, it is difficult to cause a failure, and the malfunction is not caused. There is also an advantage that it can be repaired by replacing the hood.
[0014]
Further, according to the invention of claim 3, the above object is achieved by a hood part having one end opened, a main body part connected to the other end of the hood part and having a space continuous with the internal space of the hood part, It has a vacuum evacuation means provided in the main body portion, and the space of the main body as a negative pressure forming space, and a negative pressure adjustment means provided in the main body portion or the hood portion, the negative pressure adjustment means, A small room provided between the negative pressure forming space and the external space, a small room opening / closing means for opening and closing the external space and the small room, and an internal opening and closing for opening and closing the small room and the negative pressure forming space Means and By adopting a configuration in which the small room opening and closing means and the internal opening and closing means are alternatively opened and closed, When the negative pressure in the negative pressure forming space becomes a certain level or more in a state in which the vacuuming means is continuously sucked, Periodically By guiding the air in the small room to the negative pressure forming space, Adjust to reduce pressure change Achieved by a pulsating breast pump, which is configured and has a negative pressure space limiting means for opening and closing between the main body part and the breast milk container, wherein the main body part is connected to a breast milk container. Is done.
[0015]
According to the configuration of the fifth aspect, it is possible to limit the amount of air flowing into the internal space of the hood portion by the size of the small room when the pressure changes in the pulsation operation. For this reason, compared with the case where the negative pressure is increased, the amount of air flowing in is smaller and constant compared to the case where the air is directly released to the outside, and thus the pressure change in the pulsation operation can be reduced, It can be stabilized.
Moreover, the evacuation means of the main body can perform accurate pulsation only by continuously operating. When the pulsation operation is started, the space for forming the negative pressure is limited to be small by the negative pressure space limiting means, so that the pulsation rises quickly.
[0016]
The invention of claim 4 is the structure of claim 3, The small room is integrally extended from the side surface of the hood, a lid formed of a flexible material that closes the upper end of the wall, and extends from the back of the lid into the small room. The front end includes a tact portion having an enlarged diameter portion that opens and closes the through hole through the side surface of the hood portion.
[0017]
The invention of claim 5 is the configuration of claim 4, The small room extends integrally from the side surface of the hood portion, a lid portion that closes the upper end of the wall portion, and the back surface of the lid portion into the small room. Each of the tact portions is moved by the tact portion corresponding to the negative pressure of the internal space. An end portion selectively opens and closes the internal opening / closing means and the small room opening / closing means.
[0018]
DETAILED DESCRIPTION OF THE INVENTION
Preferred embodiments of the present invention will be described below in detail with reference to the accompanying drawings.
The embodiments described below are preferable specific examples of the present invention, and thus various technically preferable limitations are given. However, the scope of the present invention is particularly limited in the following description. As long as there is no description of the effect, it is not restricted to these aspects.
[0019]
FIG. 1 is a schematic cross-sectional view showing the overall configuration of a pulsating breast pump according to an embodiment of the present invention.
In the figure, a pulsating breast pump 10 (hereinafter abbreviated as “milker 10”) is shown as a breast milk container, for example, attached to a bottle body 15 of a baby bottle.
That is, the breast pump 10 has a main body part 11 and a hood part 12. The hood portion 12 includes a wide-mouthed opening 12a whose one end is enlarged in diameter, and includes a cylindrical internal space S1 extending obliquely. The other end side of the hood part 12 is provided with a passage 12b that is bent toward the container.
[0020]
The lower end of the hood portion 12 is a ring-shaped lid body 13, and a female screw formed on the inner periphery of the lid body 13 is screwed with a male screw formed around the upper end opening of the bottle body 15. . In addition, this milking machine 10 can be attached not only to a baby bottle but also to any form of container that can be connected to the lid 13.
In addition, a short cylindrical member 19 is arranged inside the upper end opening of the bottle body 15, and this member constitutes a means for limiting the negative pressure space described later. The cylindrical member 19 is detachably attached so that the flange portion 19a at the upper end is sandwiched between the stepped portion of the hood portion 12 and the upper end of the bottle body 15.
An opening / closing lid 18 is formed at the lower end of the negative pressure space limiting means 19. When the opening / closing lid 18 is closed as shown by the solid line in the figure, it forms a partition between the inner space S 4 of the bottle body 15. Thus, the internal space S3 is closed.
[0021]
A vertical cylindrical joint 14 is integrally provided adjacent to the passage 12b of the hood part 12, and the main body 11 in which the internal space S2 is formed is attached to the joint 14.
In the figure of the main body 11, an upper casing houses a battery (not shown), a motor driven by the battery, and an electric part such as a diaphragm driven by the battery, and evacuates the internal space S <b> 2. The means 11a for this is comprised.
This evacuation means 11a is connected to the connection part 23 which became an air passage via the connecting part 22, and communicates with the internal space S2.
[0022]
Further, a pressure release button 16 connected to the internal space S2 is disposed under the vacuuming means 11a.
The pressure release button 16 has a valve body 16a that enters the internal space S2 through the through-hole 16c from the center of the back side of the head 16 and the head 16, and a closure that is formed at the tip of the valve body 16a and is located in the internal space S2. It has a portion 16b.
[0023]
A plurality of pressure release buttons 16 are provided along the back side periphery of the head 16, and have biasing means 17, 17 arranged between the back side periphery of the head 16 and the main body side. The urging means 17 and 17 are, for example, spring-like members having elasticity, and are deformed when the head 16 is pushed in the direction of the arrow A by a user's finger or the like, so that the valve body 16a is oriented in the direction of the internal space S2. The closing portion 16b opens the through hole 16c communicating with the outside air. Thereby, external air enters the internal space S2. Further, when the fingers are released, the urging means 17, 17 extend based on the elasticity as shown in the figure, so the valve body 16a is moved away from the internal space S2 and closed as shown in the figure. The part 16b closes the through hole 16c and seals the internal space S2.
[0024]
Thus, in the breast pump 10, for example, a mother or the like puts a breast (not shown) on the opening of the hood part 12 and turns on a switch (not shown) of the electric part of the main body 11, whereby the vacuuming means 11 a is activated. Thus, the internal space S2, the internal space S3 that communicates with the internal space S2, and the air in the internal space S1 of the hood portion 12 that communicates with the internal space S3 are sucked into the negative pressure space. It has become.
The breast milk squeezed from the mother's breast by this negative pressure passes through the internal space S1 of the hood part 12, is guided downward from the passage 12b, and is temporarily stored in the cylindrical member 19 (means for limiting the negative pressure space). Is done. When the opening / closing lid 18 is opened as shown by the dotted line in the figure, the breast milk falls into the bottle body 15 and is stored.
That is, the negative pressure space limiting means 19 is a bottomed cylindrical body that is mounted inside the bottle main body 15 as shown in the figure, and this bottom portion is the open / close lid 18. For example, the bottom portion has a configuration in which a bottom portion of a cylindrical body having a certain degree of elasticity is separated along the circumferential direction so as to leave a part, and a part that is not separated functions as a hinge. Thereby, the opening / closing lid 18 is structurally closed based on its rigidity, and when the negative pressure in the internal space S3 increases, the force to close the opening / closing lid 18 increases. However, if milked milk is stored in the tubular member 19 to some extent with the lid 18 closed, the lid 18 is opened by its weight.
When the open / close lid 18 of the negative pressure space limiting means is opened, the vacuum suction means 11a needs to vacuum a large volume space including the internal space S4 of the bottle body 15.
[0025]
Here, in the breast pump 10, by providing the negative pressure adjusting means 25 on the side surface of the hood part 12, it is possible to create a pulsation in which the negative pressure changes at a constant cycle.
Next, the configuration of the negative pressure adjusting means 25 will be described.
Here, the negative pressure adjusting means may be provided not only on the side surface of the hood part 12 but also in any part of S2 and S3 which are spaces for forming the negative pressure. However, in this embodiment, since the hood part 12 can be detached from the main body 11 of the breast pump 10, or because the hood part 12 protrudes greatly to the outside and has a wide side surface, attachment of the negative pressure adjusting means is easy. For this reason, the configuration becomes simple, and repair in the event of a failure becomes easy.
[0026]
2 and 3 show a first embodiment of the negative pressure adjusting means, FIG. 2 is a top view thereof, and FIG. 3 is a schematic sectional view taken along line BB of FIG.
In the figure, the negative pressure adjusting means 25 has a small room 31 provided so as to protrude into the external space. The small room 31 is a room having a relatively small volume, and is provided between the external space and the internal space S1 of the hood 12 which is a negative pressure forming space. Although the volume of the small room varies depending on the structure of the breast pump 10, in this embodiment, for example, the small room 31 has a certain volume of 20% of the space in which the negative pressure is formed.
[0027]
The upper end of the cylindrical wall forming the small chamber 31 is closed by a flexible roof-shaped lid portion 36. The lid portion 36 is formed in a dome shape that protrudes upward by a synthetic rubber material or the like, and has a flexible property.
As shown in FIG. 2, the lid portion 36 is provided with, for example, two cross-shaped cut portions 32 and 32. In the illustrated state, the cut portions 32 and 32 are closed. In this embodiment, the cut portions 32 and 32 constitute small room opening / closing means for opening and closing the external space and the small room.
As shown in FIG. 3, a columnar rod or tact portion 33 is integrally formed in the vicinity of the center between the cut portions 32, 32 on the back surface of the lid portion 36 toward the internal space of the small room 31. It extends. The lower end of the tact portion 33 communicates with the internal space S1 through a through hole 34 that penetrates the wall 37 of the hood portion 12. A first enlarged diameter portion 35 b is formed at the lower end of the tact portion 33, and the first enlarged diameter portion 35 b comes into contact with the inner space S 1 side periphery of the through hole 34, whereby the through hole 34. In addition, the lower end of the tact portion 33 is prevented from coming out of the through hole 34.
[0028]
At a position above the first diameter-expanded portion 35b of the tact portion 33 and at a distance away from at least the thickness of the wall 37 of the hood portion 12, an axial side surface of the tact portion 33 is cut out. A reduced diameter portion 35 is provided. A second enlarged diameter portion 35 a is formed above the reduced diameter portion 35.
In this embodiment, the reduced diameter portion 35 and the through hole 34 constitute an internal opening / closing means for opening and closing the small room and the negative pressure forming space.
[0029]
The first embodiment of the negative pressure adjusting means is configured as described above. As described with reference to FIG. 1, the air in the internal space S1 of the hood 12 is continuously sucked by the operation of the vacuuming means 11a. Negative pressure. When this negative pressure increases beyond a certain level, the tact portion 33 is pulled in the direction of arrow B. As a result, the first diameter-expanded portion 35b is pulled downward and away from the peripheral edge of the through hole 34. At the same time, the diameter-reduced portion 35 of the tact portion 33 moves to the position of the through-hole 34. The through hole 34 is opened. Thereby, the air in the small room 31 is introduced into the internal space S1 as indicated by an arrow C. Then, when the second diameter-expanded portion 35 a provided in the tact portion 33 hits the through-hole 34, the reduced-diameter portion 35 enters the internal space S <b> 1, and the through-hole 34 is closed, the cut portion 32 of the lid portion 33. , 32 is pulled by the tact portion 33 and deformed as indicated by a dotted line. For this reason, the notches 32 and 32 are opened, and external air enters the small room 31.
[0030]
By this operation, the air stored in the small room 31 flows into the internal space S1 in the hood 12, so that the negative pressure is reduced and the force to pull down the tact portion 33 is weakened. Based on the elasticity, the state returns to the solid line in FIG.
Then, when the vacuuming means 11a again increases the negative pressure in the internal space S1, the above operation is repeated, and pulsation as described later occurs, and the negative pressure in the hood portion 12 changes periodically. Based on this periodic change, breast milk is aspirated.
[0031]
4 to 7 show a second embodiment of the negative pressure adjusting means, and FIG. 4 is a top view showing a state in which the small room opening and closing means for opening and closing the external space and the small room is opened, FIG. 4 is a schematic cross-sectional view taken along the line CC of FIG. 4, FIG. 6 is a top view of a state in which the small room opening / closing means for opening and closing the external space and the small room is closed, and FIG. FIG. In these drawings, the negative pressure adjusting means 40 has a small room 41 provided so as to protrude into the external space. The small room 41 is a room having a relatively small volume, and is provided between the external space and the internal space S1 of the hood 12 which is a negative pressure forming space.
[0032]
The upper end of the cylindrical wall forming the small chamber 41 is closed by a flexible roof-like lid 46. The lid portion 46 is formed in a dome shape that protrudes upward by a synthetic rubber material or the like, and has a flexible property.
As shown in FIG. 4, the lid 46 is provided with a cut portion 42 that is curved at a slightly eccentric position. In the state of FIG. 4, the cut portion 42 is open, and the state of FIG. Then, the cut portion 42 is closed.
[0033]
In this embodiment, the cut portion 42 constitutes a small room opening / closing means for opening and closing the external space and the small room.
As shown in FIG. 5, a columnar rod or tact portion 43 integrally extends toward the inner space of the small room 41 at a position closer to the center than the cut portion 42 on the back surface of the lid portion 46. ing. The lower end of the tact portion 43 communicates with the internal space S <b> 1 through the through hole 34 that penetrates the wall 37 of the hood portion 12. An enlarged diameter portion 47 is formed at the lower end of the tact portion 43, and the enlarged diameter portion 47 abuts against the inner space S1 side periphery of the through hole 34 to close the through hole 34, and the tact portion The lower end of 43 is also prevented from coming out of the through hole 34.
[0034]
Above the enlarged diameter portion 47 of the tact portion 43, a reduced diameter portion 45 formed by cutting away the axial side surface of the tact portion 43 is provided at least away from the thickness of the wall 37 of the hood portion 12. Yes.
In this embodiment, the reduced diameter portion 45 and the through hole 34 constitute an internal opening / closing means for opening and closing the small room and the negative pressure forming space.
[0035]
The second embodiment of the negative pressure adjusting means is configured as described above. As described in FIG. 1, the air in the internal space S1 of the hood 12 is continuously sucked by the operation of the vacuuming means 11a. Negative pressure. When the negative pressure becomes larger than a certain level, the tact portion 43 is pulled in the direction of the arrow F as shown in FIG. As a result, the enlarged diameter portion 47 is pulled downward and away from the periphery of the through hole 34, and at the same time, the reduced diameter portion 45 of the tact portion 43 moves to the position of the through hole 34. 34 is opened. Thereby, the air in the small room 41 is introduced into the internal space S1 as indicated by the arrow E. At the same time, a region where the cut portion 42 of the lid portion 43 is pulled is pulled by the tact portion 43, and a deformation that protrudes inward as shown in FIG. 7 occurs. For this reason, the notch part 42 is closed and the air of the external part does not enter the small room 41.
[0036]
By this operation, the air stored in the small room 41 flows into the internal space S1 in the hood 12, so that the negative pressure is reduced and the force to pull down the tact portion 43 is weakened. Based on the elasticity, the state returns to the state of FIG. As a result, the cut portion 42 is opened and external air is introduced into the small chamber 41 as indicated by an arrow D.
Then, when the vacuuming means 11a again increases the negative pressure in the internal space S1, the above operation is repeated, and pulsation as described later occurs, and the negative pressure in the hood portion 12 changes periodically. Based on this periodic change, breast milk is aspirated.
[0037]
8 to 11 show a third embodiment of the negative pressure adjusting means, FIG. 8 is a top view thereof, and FIGS. 9 to 11 are schematic sectional views taken along the line DD of FIG. 9 to 11 show each stage of the operation.
In these drawings, the negative pressure adjusting means 50 has a small chamber 51 provided so as to protrude into the external space. The small room 51 is a room having a relatively small volume, and is provided between the external space and the internal space S1 of the hood 12 which is a negative pressure forming space.
[0038]
The upper end of the cylindrical wall that forms the small chamber 51 is closed by a lid portion 56. The lid portion 56 includes a projection 56b in the small chamber 51 on the lower surface, and is not deformed as in the other embodiments.
A through hole 56a is formed at a position corresponding to the end portion shown in FIG. 8 of the lid portion 56, and the through hole 54 is formed in the wall surface (side surface) 37 of the hood portion 12 directly below the through hole 56a. Is formed.
[0039]
A columnar rod or tact portion 53 is inserted through the through holes 56a and 54. The tact portion 53 is provided so as to be swung up and down along the wall surface 37 a of the small room 51. In the space in the small room 51, a latching piece 57 that extends horizontally from the middle of the tact portion 53 is provided, and between the latching piece 57 and the wall surface (side surface) 37 of the hood portion 12, For example, a coil spring is inserted as the biasing means.
In addition, a first cutout 59 is formed in the upper part of the tact part 53 between a position slightly below the upper end and the upper surface of the hooking piece 57. The first cutout 59 is An upper step 59a and a lower step 59b are provided. The size of the first cutout portion 59 in the vertical direction is at least larger than the thickness of the lid portion 56.
In this embodiment, the through hole 56a and the first notch 59 constitute a small room opening / closing means for opening and closing the external space and the small room.
[0040]
A second cutout portion 55 is formed at a position slightly above the lower end portion at the lower portion of the tact portion 53, and the second cutout portion 55 includes an upper step portion 55a and a lower step portion 55b. . The size of the second cutout portion 55 in the vertical direction is set to be at least larger than the thickness of the side surface 37 of the hood portion 12.
Furthermore, first, the distance between the upper step 59a of the notch 59 and the lower step 55b of the second notch 55 is set so as not to exceed the distance between the outer edge portions of the through holes 56a and 54. ing.
In this embodiment, the through hole 54 and the second cutout portion 55 of the tact portion 53 constitute internal opening / closing means for opening and closing the small chamber and the negative pressure forming space.
[0041]
The third embodiment of the negative pressure adjusting means is configured as described above. When the use of the breast pump 10 is started, the internal space S1 of the hood portion 12 is at atmospheric pressure and no negative pressure is generated. For this reason, as shown in FIG. 9, the tact portion 53 is located at the upper end, and the upper surface of the latching piece 57 is in contact with the protrusion 56 b of the lid portion 56.
The upper step portion 59a of the first cutout portion 59 of the tact portion 53 is located above the upper end of the through hole 56a, and the external space communicates with the inside of the small room 51. The arrow G extends from the external space. As shown in FIG. 3, air is introduced into the small room 51.
[0042]
Next, as described with reference to FIG. 1, the air in the internal space S <b> 1 of the hood 12 is continuously sucked into a negative pressure by the operation of the vacuuming means 11 a. When the negative pressure becomes larger than a certain level, the tact portion 53 is gradually pulled in the direction of the arrow against the urging force of the coil spring 58 as shown in FIG. Accordingly, the upper step portion 59a of the first cutout portion 59 of the tact portion 53 is positioned below the upper end of the through hole 56a and closes the through hole 56a.
At the same time, the lower step portion 55b of the second cutout portion 55 of the tact portion 53 is not lowered beyond the lower end of the through hole 54, so that the through hole 56a and the through hole 54 are blocked in the state of FIG. ing.
[0043]
Next, when the negative pressure in the internal space S1 further increases, the tact portion 53 is further pulled in the direction of the arrow against the urging force of the coil spring 58. Accordingly, the upper step portion 59a of the first cutout portion 59 of the tact portion 53 is positioned below the lower end of the through hole 56a and continues to close the through hole 56a.
On the other hand, the lower step portion 55 b of the second cutout portion 55 of the tact portion 53 descends beyond the lower end of the through hole 54. Accordingly, in the state of FIG. 11, the through hole 56 a is closed, but the through hole 54 communicates with the inside of the small room 51 by the second notch portion 55, so that only the air in the small room 51 is present. Is introduced into the internal space S1 in character.
[0044]
By this operation, only the air stored in the small room 51 flows into the internal space S1 in the hood 12, so that the negative pressure is accurately reduced by the air volume of the small room 51, and the tact portion 53 is Since the downward pulling force is weakened, it becomes impossible to resist the urging force of the coil spring 58, the tact portion 53 is raised and returns to the state of FIG. 9, and external air is introduced into the small chamber 51.
Then, when the vacuuming means 11a again increases the negative pressure in the internal space S1, the above operation is repeated, and pulsation as described later occurs, and the negative pressure in the hood portion 12 changes periodically. Based on this periodic change, breast milk is aspirated.
[0045]
Thus, in the third embodiment, as described with reference to FIG. 10, the first cutout portion 59 and the second cutout portion 55 have an outer space and an inner space, respectively, as compared with the other embodiments. Since it is certainly opened alternatively to S1, the amplitude of the pulsation is made very accurately.
[0046]
FIG. 12 shows a flowchart for briefly explaining an example of the overall operation of the breast pump 10 of the present embodiment, and the relationship between the negative pressure in each step.
In the figure, a breastfeeder who is a user applies the opening 12a of the hood 12 to his / her breast (ST1). Here, normally, the open / close lid 18 of the negative pressure space limiting means 19 in FIG. 1 is closed as shown by a solid line.
Next, when a switch (not shown) is turned on to operate the motorized part (ST2) and a diaphragm (not shown) which is a part of the evacuation unit is operated, the evacuation unit 11a is a negative pressure forming space. By sucking air in the spaces S2, S3, and S1, these spaces are evacuated to generate a negative pressure (ST3). In this state, negative pressure has just formed and is weak (small).
[0047]
When the operation of the vacuuming means 11a continues and this negative pressure becomes larger than a certain level (ST4), the milking operation by pulsation starts from here.
As described in the above embodiments, when each negative pressure generating means is operated and the internal opening / closing means between the small room and the internal space is opened, the air in the small room enters the internal space. Weakens (ST5).
Here, the milked milk is guided from the internal space S1 to S3 by the milking operation and temporarily stored in the negative pressure space limiting means 19 that is a cylindrical member. 18 is opened (ST6, ST7). On the other hand, as long as a certain amount of breast milk does not accumulate, the process proceeds to ST8 (ST6, ST8).
That is, since the open / close lid 18 cannot be opened while the breast milk does not reach a certain amount in the negative pressure space limiting means 19, the process proceeds to ST8, the internal open / close means is closed, and the negative pressure increases ( ST8). Further, when a certain amount of breast milk is accumulated in ST6 and the opening / closing lid 18 is opened, the breast milk immediately falls and stored in the bottle body 15, and the opening / closing lid 18 is immediately closed, and the process proceeds to ST8.
Next, as long as the milking operation is not completed, the operation returns to ST5, and the above operation is repeated until the operator finishes the milking operation while observing the amount of milk stored in the bottle body 15 and how to get out. If the operator determines that the milking operation has been completed because the amount of breast milk stored in the bottle main body 15 is not stored or the milking operation is finished (ST9), ST10 is performed. Then, the head 16a of the pressure release button 16 is pushed in the direction of the arrow A in FIG. 1, the internal spaces S2, S3, S1 are set to atmospheric pressure (ST10), the power switch (not shown) is turned off, and the use is started. The process ends (ST11).
[0048]
FIG. 13: is a graph which shows the mode of the pulsation in the milking operation | movement of the milking machine 10 of this embodiment, and the conventional pulsation type milking machine.
A shown in the figure is based on the breast pump 10 of the present embodiment, B is the one shown in FIG. 1 without the limiting means 18 or used with the open / close lid 18a open, and C is a conventional pulsating breast pump. It is.
[0049]
As shown in the drawing, the breast pump 10 of the present embodiment includes negative pressure adjusting means, so in the formation of the negative pressure from the start of use, the rising speed until the negative pressure of a certain magnitude is reached. Fast and accurate pulsation with a small amplitude can be realized as compared with the prior art. As a result, it is possible to realize a milking operation that is very similar to the pulsation in the feeding operation of an infant and that can be used without causing discomfort, with very little stimulation given to the breast of the user.
In addition, the negative pressure adjusting means can automatically realize the negative pressure that causes such pulsation, has a simple configuration, and can perform a reliable operation with few failures.
[0050]
The present invention is not limited to the above-described embodiment, and a configuration not described above can be added. Moreover, a part of each structure of the said embodiment can be abbreviate | omitted, and you may combine mutually.
[0051]
【The invention's effect】
As described above, according to the present invention, it is possible to provide a pulsating breast pump capable of reducing a pressure change in pulsation and realizing a pressure change that is not unreasonable to use.
[Brief description of the drawings]
FIG. 1 is a schematic cross-sectional view showing a configuration of a pulsating breast pump according to an embodiment of the present invention.
2 is a top view showing a first embodiment of a negative pressure adjusting means of the pulsating breast pump of FIG. 1. FIG.
3 is a schematic cross-sectional view taken along line BB in FIG.
4 is a top view of the second embodiment of the negative pressure adjusting means of the pulsating breast pump of FIG. 1 with the small chamber opening / closing means for opening / closing the small room open and closed. FIG.
FIG. 5 is a schematic cross-sectional view taken along the line CC of FIG.
6 is a top view of a state in which a small room opening / closing means for opening / closing the external space and the small room of the negative pressure adjusting means of FIG. 4 is closed. FIG.
7 is a schematic cross-sectional view taken along the line CC in FIG. 6. FIG.
8 is a top view showing a third embodiment of the negative pressure adjusting means of the pulsating breast pump of FIG. 1. FIG.
9 is a schematic cross-sectional view taken along the line DD of FIG. 8, and is a top view showing a state in which a small room opening / closing means for opening and closing the external space and the small room is opened.
FIG. 10 is a schematic cross-sectional view taken along the line DD of FIG. 8 and closes the small room opening and closing means for opening and closing the external space and the small room, and also closes the internal opening and closing means for opening and closing the small room and the negative pressure forming space. FIG.
11 is a schematic cross-sectional view taken along the line DD of FIG. 8, and shows a state in which a small room opening / closing means for opening and closing the external space and the small room is opened.
12 is a flowchart showing an example of the operation of the pulsating breast pump of FIG. 1. FIG.
13 is a graph comparing the pulsating action of the pulsating breast pump of FIG. 1 with the pulsating action of a conventional pulsating milking machine.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 ... Pulsating breast pump, 11 ... Main body, 12 ... Main body, 13 ... Lid body, 15 ... Bottle main body, 16 ... Pressure release button, 18 ... Opening / closing lid, 19 ... Limiting means (of negative pressure space), 25 ... Negative pressure adjusting means, 31 ... Small room, 32 ... Cutting, 35 ... Tact part, 36 ... Lid part, 40 .. Negative pressure adjusting means, 41... Small room, 42... Cutting, 43... Tact part, 46. 53 ... tact part, 56 ... lid part, S1, S2, S3, S4 ... internal space

Claims (5)

A pulsating breast pump having a negative pressure forming space in which a negative pressure is formed by a vacuum pulling means in a state where the opening of the hood is closed,
A small room provided between the negative pressure forming space and the external space;
A small room opening and closing means for opening and closing the external space and the small room, and an internal opening and closing means for opening and closing the small room and the negative pressure forming space,
When the small chamber opening / closing means and the internal opening / closing means are selectively opened and closed , the negative pressure in the negative pressure forming space becomes a certain level or more in a state where the vacuum suction means is continuously sucked. A pulsating breast pump comprising negative pressure adjusting means configured to adjust the pressure change to be reduced by periodically guiding the air in the small room to the negative pressure forming space.   The pulsating breast pump according to claim 1, wherein an internal space of the hood communicates with the negative pressure forming space, and the negative pressure adjusting means is provided in the hood. A hood with one end open;
The other end of the hood part is connected, and a main body part having a space continuous with the internal space of the hood part,
Vacuum evacuation means provided in the main body, and the space of the main body as a negative pressure forming space;
Negative pressure adjusting means provided on the main body or the hood,
The negative pressure adjusting means is
A small room provided between the negative pressure forming space and the external space;
Small room opening and closing means for opening and closing the external space and the small room;
An internal opening and closing means for opening and closing the small room and the negative pressure forming space,
When the small chamber opening / closing means and the internal opening / closing means are selectively opened and closed , the negative pressure in the negative pressure forming space becomes a certain level or more in a state where the vacuum suction means is continuously sucked. , And is configured to adjust the pressure change to be small by periodically guiding the air in the small chamber to the negative pressure forming space,
And the main body is connected to a container for breast milk,
A pulsating breast pump, comprising a negative pressure space limiting means for opening and closing between the main body and the breast milk container. The small room is integrally extended from the side surface of the hood, a lid formed of a flexible material that closes the upper end of the wall, and extends from the back of the lid into the small room. The pulsating breast pump according to claim 3, wherein the pulsating breast pump includes a tact portion having a diameter-expanding portion whose front end penetrates the side surface of the hood portion and opens and closes the through hole. The small room extends integrally from the side surface of the hood portion, a lid portion that closes the upper end of the wall portion, and the back surface of the lid portion into the small room. Each of the tact portions is moved by the tact portion corresponding to the negative pressure of the internal space. The pulsating breast pump according to claim 4, wherein the end portion selectively opens and closes the internal opening and closing means and the small room opening and closing means.

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