JPH01171564A - Milking machine - Google Patents

Abstract

PURPOSE:To simplify a constitution by functioning a suction room between a diaphragm and a cap like a pump, making the inside of a bolt into a negative pressure and adjusting a pressure adjusting mechanism between a valve rod and a valve seat with a pressure releasing button. CONSTITUTION:A milking machine is composed of a milking part B, a suction part C, a pressure adjusting mechanism D and a negative pressure exciting part E and fitted at the upper part of a bottle A. The pressure adjusting mechanism D and the negative exciting part E have a compressing coil spring 41, a valve rod 42, a diaphragm 43, a cap 44, a pressure releasing button 45 and a pressure adjusting knob 46, and when the pressure releasing button 45 is intermittently pressurized, the section between the valve rod 42 and a valve seat part 43c is intermittently separated, outside air is introduced into the bottle A and the negative pressure in the bottle A is lowered.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a breast pump used for expressing breast milk, and more particularly to a pressure adjustment mechanism for creating a negative pressure inside a bottle for storing breast milk.

BACKGROUND OF THE INVENTION Breast pumps equipped with electric suction devices are becoming popular. However, the above-mentioned breast pumps have drawbacks such as uniform suction action and unilateral expression of breast milk, which places too much strain on the breasts and causes discomfort to the mother's body.

For this reason, the present applicant has already developed a breast pump capable of finely adjusting the suction pressure in U.S. Pat.
No. 44]. Hereinafter, the above-mentioned breast pump will be explained with reference to FIGS. 14 to 22.

Figure 14 is an overall perspective view of the breast pump, and Figure 15 is the first
FIG. 4 is an enlarged longitudinal sectional front view of FIG. 4 with a partial cutaway.

A breast pump consists of a bottle (A) that stores expressed breast milk, a milking part (B) that presses against the breast, and an electric suction part (C) that creates negative pressure inside the bottle (A) in the vertical direction. It has a connected structure.

The milking section (B) includes a substantially cylindrical base (1) and the base (
1), a body part (2) horizontally installed integrally on the upper part of the body part (2), and a trumpet-shaped cup part (3) that expands from the tip of the body part (2).
It consists of The lower part of the base (1) of the milking part CB) is a lower connecting part (1a), which is screwed into the upper part of the bottle (A). Further, the upper part of the base (1) is an upper connecting part (1b), and the lower part of the electric suction part (C) is fitted into this upper connecting part (1b). Further, an adapter (4) for reducing the diameter of the body (2) is detachably provided at the boundary between the body (2) and the cup part (3) of the milking section (B). The adapter (4) improves suction power by making close contact with the areola, and is used to correct small nipples, inverted nipples, and flat nipples.

The electric suction part (C) includes a main body (5) that fits into the upper connecting part (1b), a top cover (6) that fits into the upper part of the main body (5), and is stored inside the main body (5). It consists of a mounting body (7). A motor (8) and a battery (9) electrically connected by a thin cord (not shown) are seated on the mounting body (7). A crank pin (8a) is attached to the motor (8), and the battery (9) can be replaced by removing the upper M (6) from the main body (5). The main body (5) is made by abutting two cases (5a) and (5b) that are divided vertically, and in Fig. 15, a vertical hole is bored in the center of the left case (5a). A sliding switch (10) is disposed in this vertical hole by being screwed from the inside with a screw (10a).

A horizontal hole (5c) is bored in the main body (5) below the switch (10) and near the upper connecting part (1b) of the milking part (B), and a pressure adjustment mechanism (D) is provided. .

An exploded longitudinal sectional front view of the pressure adjustment mechanism (D) is shown in FIG. 16 and will be described. Hereinafter, in the same figure, the right side will be referred to as the inside.
The left side is called the outside. The pressure adjustment mechanism (D) is attached to the mounting body (7
), and an outside air introduction hole (7a) is formed coaxially with the horizontal hole (5c), and the following 8 are formed in this outside air introduction hole (7a).
Constructed by inserting individual parts. That is, from the inside, the compression coil spring (11), the valve stem (12), the packing (13)
), a valve seat (14), a pressure release button shaft (15), a pressure adjustment screw (16), a pressure adjustment knob (17), and a pressure release button pusher (18). Outside air introduction hole (
7a) has a reverse female thread (7b). valve seat(
14) and the pressure adjustment screw (16), respectively, with oppositely threaded male screws (14a) and (16a). Attach the valve seat (14) to the female thread (7b) of the outside air introduction hole (7a).
) and the male screw (14a) of the pressure adjustment screw (16) (
16a). Valve stem (12) and packing (13)
) are fitted together and housed in the outside air introduction hole (7a). Then, the compression coil spring (11) urges the valve stem (12) outward, and the packing (13) comes into close contact with the valve seat (14). The first cross-sectional view of the pressure adjustment screw (16) on the line X-X
7, and a cross-sectional view of the pressure adjustment knob (17) taken along Y-Y line is shown in FIG. 18. As shown in both figures, tighten the pressure adjustment screw (
16) and the pressure adjustment knob (17) are splines (16).
b) (17a) (described as "streak knurling" in Japanese Utility Model Application Publication No. 61-54844) is formed and integrated and fitted together. A cross-sectional view of this fitted and integrated state is shown as the pressure release button shaft. It is shown in Figure 19 including the part (15). In the same figure, (5d) is the upper edge of the horizontal hole (5c) and the case (5).
This is a stopper protruding from a). Pressure adjustment knob (1
A locking piece (17b) is formed on the inside of 7), and when this locking piece (17b) hits the stopper (5c), the pressure adjustment knob (17) can be rotated within approximately 360 degrees. Regulated.

A negative pressure inducing portion (E) is formed inside the mounting body (7) of the pressure adjustment mechanism (D), and an exploded sectional view thereof is shown in FIG. 16 as well. The negative pressure inducing portion (E) includes a mounting body (7), a diaphragm (19), and a cap (20). Mounting body (
7) is shown in Fig. 20, and the diaphragm (19
) is shown in FIG. 21, and a left side view of the cap (20) is shown in FIG. 22. The diaphragm (19) is a vibrating part (19) that projects outward to form a suction chamber (19a).
b), an inlet valve (19c) and an exhaust valve (19d) facing each other at 90 degrees, and protruding outward from the vibrating part (19b);
It consists of a bushing part (19e) that fits into a crank pin (8a) attached to the motor (8). Suction valve (19
c) opens only to the inside, and the exhaust valve (19d) opens only to the outside. The mounting body (7) is provided with a fitting hole (7c) corresponding to the vibrating part (19b), and a fitting hole (7c) is formed in the mounting body (7) to correspond to the vibration part (19b).
c) and the position of the exhaust valve (19d).
d) and an exhaust hole (7e). The cap (20) also has a recess (19a) in the diaphragm (19).
), a convex portion (20a) having a diameter slightly smaller than the inner diameter of the concave portion (19a) is provided to protrude from the suction hole (7d).
and the exhaust hole (7e), the first and second narrow grooves (20
b) Engraving (20c).

The outside air introduction hole (7a) and the suction hole (7d) of the attachment body (7) communicate with the lower end of the suction part (C) through the air suction hole (7f). However, a filter (21) is fitted into the air suction hole (7f) to prevent milk from flowing into the suction part (C).

In FIG. 15, a fitting ring (22) is fitted to the lower end (5e) of the main body (5) of the suction part (C), and the milking part (B) is fitted with a fitting ring (22).
The upper connecting portion (1b) of the upper connecting portion (1b) is elastically connected and detachably connected. Further, a small hole (1c) for a milking section is bored on the lower side of the upper connecting portion (1b), and a guide ring (1d) is placed in a lower stage surrounding this small hole (1c). The guide ring (1d) prevents milk from being sucked directly into the small hole (lc) of the milking section. An annular packing (23) is interposed between the lower connecting part (1a) of the milking part (B) and the bottle (A) to bring them (A) and (B) into close contact with each other.

The breast pump with finely adjustable suction pressure is constructed as described above.
Next, the operation will be explained.

First, place the cup part (3) of the suction part (B) firmly against the breast and slide the switch (10) to turn on the power. Then, the crank bin (8a) attached to the motor (8) rotates eccentrically. Then, the diaphragm (19) fitted with the crank pin (8a) vibrates, and the air in the bottle (A) passes through the filter (21) from the small hole (1c) in the milking part to the air in the suction part (C). It is sucked into the suction hole (7f) and the inside of the bottle (A) becomes negative pressure. Therefore, the milk is transferred to the milking part (B).
The milk is expressed through the body (2) of the sucking part (B) and the guide ring (22), and falls into the bottle (A) and accumulates there.

In this case, if the pressure adjustment knob (17) fitted with the pressure adjustment screw (16) is turned counterclockwise, the valve stem (12)
) and the valve seat (14) are separated from each other, and outside air flows into the air intake hole (7f) from the side hole (5C). Therefore, the suction pressure inside the bottle (A) decreases, and the milking force and suction force also decrease, resulting in gentle milking. Conversely, when the pressure adjustment knob (17) fitted with the pressure adjustment screw (16) is turned clockwise, the seal (13) fitted on the valve stem (12) and the valve seat (14) are closed. , outside air does not flow into the air intake hole (7f). Therefore, the inside of the bottle (A) becomes the maximum negative pressure, and the milk flows strongly into the sucking part (B).
) is more attracted. Pressure adjustment knob (17) like this
The suction pressure can be changed precisely by changing the degree of rotation.

In addition, even if the gasket (13) fitted to the valve stem (12) and the valve seat (14) are closed, the valve stem (12) can be released by simply pressing the pressure release button pusher (18). The gasket (13) fitted into the valve seat (14) can be instantly separated from the valve seat (14), and by pressing the pressure release button pusher (18), outside air can be released from the side hole (5C) to the air intake hole ( 7f) to reduce the suction pressure. Therefore, the intermittent pressing operation of the pressure release button pusher (18) can provide appropriate stimulation to the nipple, producing the effect of milking just like a baby's sucking action.

Moreover, the pressure adjustment knob (17) and the pressure release button pusher (1
8) is installed on the lower side of the suction part (C),
Adjustment of the suction pressure can be performed with one hand, so the other hand can be used to massage the outer circumference of the breast or assist in milking.

Problem to be solved by Akira The pressure adjustment mechanism CD) has a total of 11 parts including the mounting body (7) and the negative pressure generating part (E) in order to be able to precisely change the suction pressure. It is composed of individual parts.

If the number of parts is large, it takes time and effort to manufacture the parts. Therefore, an object of the present invention is to reduce the number of parts of the pressure adjustment mechanism (D).

■1 filter j) 41 stages to U1ζ In order to achieve the above object, the present invention provides a bottle for storing expressed breast milk, a milking part that presses against the breast, and a pressure adjustment mechanism that creates negative pressure in the bottle. In the breast pump, the pressure adjustment mechanism and the negative pressure generating part are connected vertically to a suction part having a negative pressure generating part, and the pressure adjusting mechanism and the negative pressure generating part are connected to a mounting body having an outside air introduction hole, a compression coil spring, and a tapered surface. a diaphragm having a valve seat portion that can come into close contact with the tapered surface; a cap that forms an intake chamber between the diaphragm; and a cam surface that blocks pressure release from the valve stem. Button and
and a pressure adjustment knob that applies a pressing force to the cam surface.

By using the above solution, the suction chamber between the diaphragm and the cap functions like a pump, making it possible to create a negative pressure inside the bottle. Further, by rotating the pressure adjustment knob, the pressure release button having a cam surface moves back and forth, and the valve stem that is in contact with the pressure release button and the valve seat portion of the diaphragm are continuously separated from each other. When the pressure release button is pressed intermittently, the valve stem and the valve seat are intermittently separated from each other. When the valve stem and the valve seat are separated from each other, outside air is introduced into the bottle, and the negative pressure inside the bottle is reduced.

One embodiment of the present invention will be described with reference to FIGS. 1 to 13.

FIG. 1 is a cross-sectional front view of the entire upper part of the bottle (A), the base of the milking part (B), and the suction part (C).

The suction part (C) consists of a main body (25), an upper M (26) that fits into the main body (25), and a mounting body (27) that is housed inside the main body (25). A motor (8) and a battery (9) are housed in the mounting body (27), and both (8) and (9) are electrically connected by an elongated copper plate (28). However, the copper plate (28) is provided with movable contacts (28a) at - locations. A crank pin (8a) is attached to the motor (8), and the battery (9) can be replaced by removing the upper M (26) from the main body (25). The main body (25) is divided into two cases (25a) that are vertically divided, which is different from the conventional case.
) (25a) are abutted, and a notch is formed at the top and middle of one of the abutting sides. A light emitting diode (29) is fitted into the notch at the top to notify the state of battery (9) consumption. A sliding switch (30) is provided in the notch in the middle. This switch (30) is connected to the case (
Since it is disposed in the notch 25a), there is no need to screw the screw together from the inside as in the conventional case. Below the switch (30) and near the upper connecting part (31b) of the milking part (B), a horizontal hole (25b) is bored in the main body (25), and the pressure adjustment atfl (D) and the negative Equipped with a pressure-inducing part (E).

FIG. 2 shows an exploded longitudinal sectional front view of the pressure adjustment mechanism (D) and the negative pressure generating section (E). Hereinafter, in the figure, the right side will be referred to as the inside, and the left side will be referred to as the outside.

The pressure adjustment mechanism (D) and the negative pressure generating part (E) are attached to the mounting body (2).
7) Equip the following six parts to the outside. That is, from the inside: the compression coil spring (41), the valve stem (42), the diaphragm (43), the cap (44), and the pressure release button (4).
5) There are six parts of the pressure adjustment knob (46).

A left side view of the mounting body (27) is shown in FIG. 3, and will be described in conjunction with FIG. 2. At the bottom of the mounting body (27), a vertical air suction hole (27a) is formed.
In the middle part of 27a), there is a horizontal hole (25b) of the main body (25).
) is coaxial with an outside air introduction hole (27b) with a stepped portion facing outward. A suction hole (27c) is formed above the outside air introduction hole (27b), which penetrates from the outer surface of the mounting body (27) to the air suction hole (27a). Mounting body (27)
A fitting hole (27d) having a circular side surface shape is bored in the middle part of the fitting hole (27d).

The compression coil spring (41) is connected to the outside air introduction hole (27b).
) and stops at the step.

The valve stem (42) has a tapered surface (42a) that expands in diameter into a conical shape on the inner side, and a spline (42b) with a cross-shaped side cross section on the outer side. A diagram is shown in FIG.

A left side view of the diaphragm (43) is shown in FIG.
This will be explained along with the diagram. The middle part of the diaphragm (43) forms a circular vibrating part (43a) and protrudes inward,
The protruding vibrating portion (43a) is fitted into the fitting hole (27d) of the mounting body (27). A bushing part (43b) is made to protrude further inward from the center of the vibrating part (43a),
Fit into the crank bin (8a) attached to the motor (8). Therefore, as the motor (8) rotates, the crank pin (8a) rotates eccentrically, and the bushing part (43b) moves back and forth, thereby vibrating the vibrating part (43a).

The lower end of the diaphragm (43) forms a valve seat (43c) coaxial with the horizontal hole (25b) of the main body (25), and the tapered surface of the valve stem (42) biased by the compression coil spring (41). (42a) are brought into close contact. Diaphragm (43)
is an elastic body, and the valve stem (42) and the valve seat (4) do not need to be fitted with a packing as in the conventional case.
3b) is in close contact in a steady state. A suction valve (43d), which is a check valve that can open outward, is formed between the vibrating part (43a) and the valve seat part (43c) of the diaphragm (43). A discharge valve (43e), which is a check valve that can open inward, is formed above the vibrating portion (43a) of the diaphragm (43).

A right side view of the cap (44) is shown in FIG. 6, and will be explained in conjunction with FIG. 2. A convex portion (44a) that fits into the vibrating portion (43a) of the diaphragm (43) with a gap is formed inside the center portion of the cap (44). Convex part (44a
) is recessed in the shape of a forest, and the diaphragm (43
), an intake chamber (44b) is formed between the vibrating part (43a) and the vibrating part (43a). A first narrow groove (44) extends downward from the intake chamber (44b).
c), and a second narrow groove (44d) is carved upward from the intake chamber (44b). An outside air introduction hole (44e) coaxial with the horizontal hole (25b'') of the main body (25) is bored below the first narrow groove (44c), and the valve stem (42) passes through it.

An exhaust hole (44f) is located above the second narrow groove (44d).
to be drilled.

A plan view of the pressure release button (45) is shown in FIG. 7, and a right side view is shown in FIG. 8, which will be explained in conjunction with FIG. 2. A flange is provided around the pressure release button (45), and a cam surface (45a) as shown in FIG. 7 is formed. Also, as shown in Figure 8, there are grooves (45
b) and engages with claws (not shown) protruding from both sides of the horizontal hole (25b) of the main body (25), and presses the pressure release button (4).
5) Do not rotate but only move back and forth. In addition, a recess (45c) is formed in the center, and this recess (45c)
c) abut the valve stem (42).

A right side view of the pressure adjustment knob (46) is shown in FIG. 9, and will be explained in conjunction with FIG. 2. The pressure adjustment knob (46) is
A flange (46a) is provided around the outer end face to block the pressure release button (45) from being biased outward. Flange (46a
), and this protrusion (46b) touches the cam surface (45a) of the pressure release button (45).
). , by rotating the pressure adjustment knob (46), this protrusion (46b) also rotates, and the protrusion (46
b) presses the cam surface (45a) of the pressure release button (45), so when the pressure adjustment knob (46) is rotated clockwise, the protrusion (46b) is recessed inside the cam surface (45a). the pressure release button (45) to the outside to urge the valve stem (42) to the outside.

Next, referring to FIG. 1, the fitting portion between the suction section (C) and the milking section (B) will be explained.

The main body (2) of the suction part (C) that houses the pressure adjustment mechanism (D)
5) The lower end part is connected to the upper connecting part (31b) of the milking part (B).
) and is removably mated. The upper connecting portion (31b) has an outer annular protrusion (31c) and an inner annular protrusion (31c).
d') and a small hole (31e) is bored in the center of the inner annular projection (31d). Outer annular projection (3
1c) fitted into the lower end of the main body (25)
32). Inner annular projection (31d)
Insert the check valve (33) from above. Check valve (3
3) is composed of a cylinder (33a) made of synthetic resin and a ball (33b) inserted into the cylinder (33a). The upper surface of the cylindrical body (33a) has a concave surface (33a+) in close contact with (33b), and the lower end has four protrusions (33a).
z) to protrude so that the ball (33b) can move between the concave surface (33a+) and the convex strip (33az). That is, in a steady state, the ball (33b) is supported by the convex strip (33az), and air flows from the small hole (31e) of the milking part (B) to the air suction hole of the attachment body (27) of the suction part (C). (27a). Also, if the breast pump falls over,
The ball (33b) is in close contact with the concave surface (33a1), and the bottle (
Prevents the milk accumulated in A) from flowing into the suction part (C).

The milking section (B) connects the lower connecting section (31a) to the bottle (A).
A dome-shaped cup (34) is interposed between the upper end opening of the bottle (A) and the milking section (B). The cup (34) has a flange (34a) surrounding the top opening, and the flange (34a) is placed on the top opening of the bottle (A). The tsuba (34a) has, for example, four cups (
A suction hole (34b) is formed so as to be in contact with the side surface of the bottle (34), and the air inside the bottle (A) is sucked. A through hole (34c) is formed in the reduced diameter portion at the lower end of the cup (34) so that expressed breast milk drips into the bottle (A). The reason why such a dome-shaped cup (34) is installed is that when the breast pump falls down, milking stops due to the above-mentioned check valve (34).
This is to prevent the flow to 3). Cup (34)
By replacing the material with rubber, soft plastic, etc., the packing (23) used in the past can be omitted.

The check valve (33) and the cup (34) have already been disclosed by the present applicant in Japanese Patent Application No. 88524/1988.

The breast pump according to this embodiment is constructed as described above, and its operation will now be described with reference to FIGS. 10 to 13. Figures 10 to 13 show the pressure adjustment mechanism (D)
and an assembled longitudinal sectional front view of the negative pressure inducing part (E).

First, the operation of creating a negative pressure inside the bottle (A) will be explained with reference to FIGS. 10 and 11. Turn on the switch (30)
When the motor (8) is rotated, the crank pin (8a) attached to the motor (8) rotates eccentrically. Then, the vibrating part (43a) of the diaphragm (43) moves back and forth, and the air intake chamber (44b) formed between it and the cap (44)
expands and contracts continuously. As shown in Figure 10, the suction chamber (
When 44b) expands, the pressure within the suction chamber (44b) decreases. Then, the air in the bottle (A) flows through the through hole (34C) of the cup (34) and the small hole (3) of the milking part (B).
1e), check valve (33), air intake hole (27a)
, the suction hole (27c), the suction valve (43d) is opened, the flow passes through the first narrow groove (44c), and the suction chamber (44b) is opened.
). At this time, the exhaust valve (43e) is urged in the direction of closing the second narrow groove (44d') by suction pressure, so that the outside air flows from the exhaust hole (44f) into the intake chamber (44d').
b) will not flow into. In addition, in a steady state, the valve stem (42) is biased by the compression coil spring (41), and the tapered surface (42a) of the valve stem (42) and the diaphragm
(43) is in close contact with the valve seat (43c), so outside air will not flow in through the outside air introduction hole (27b).

Next, as shown in FIG. 11, when the intake chamber (44b) contracts, the discharge valve (43e) opens and the intake chamber (44b) contracts.
The air from the bottle (A) that has flowed into 4b) is discharged to the outside through the second narrow groove (44d) and the discharge hole (44f). At this time, since the suction valve (43d) does not open due to pressurization, the air that has flowed into the suction chamber (44b) does not flow out from the suction hole (27c).

In this way, the intake chamber (44b) functions as a pump.
By expanding and contracting the volume of , the air in the bottle (A) sequentially becomes
The air is sucked into the intake chamber (44b') and the exhaust hole (44f)
is discharged from. Then, the inside of the bottle (A) becomes negative pressure, and the breast that is in close contact with the cup part (3) of the milking part (B) is sucked, and milk can be expressed.

If the milking force is too strong, the milking force can be weakened by rotating the pressure adjustment knob (46) counterclockwise, as shown in FIG. Pressure adjustment knob (4
6) is provided with a protrusion (46b) on the inside, and this protrusion (46b) connects to the cam surface (45a) of the pressure release (45).
Press. When the pressure adjustment knob (46) is rotated counterclockwise, the protrusion (46b) extends outward from the cam surface (4).
Press 5a). Since the pressure adjustment button (45) does not rotate and the pressure adjustment knob (46) does not move forward or backward,
When the protrusion (46b) presses the cam surface (45a), the valve stem (42) that is in contact with the recess (45c) of the pressure release (45) resists the compression force of the compression coil spring (41). The tapered surface (4) of the valve stem (42) is pressed inward.
2a) and the valve seat portion (43c) of the diaphragm (43) are separated from each other. Then, the outside air flows through the outside air introduction hole (44e) of the cap (44) and the spline (42) of the valve stem (42).
b) of the outside air introduction hole (27b) of the mounting body (27).
) and, as a result, air is supplied into the bottle (A). Therefore, even if the air inside the bottle (A) is sucked by the diaphragm (43), the suction pressure of the air inside the bottle (A) is weakened and extended,
Milking power weakens. That is, milking can be performed continuously with a weak milking force.

It is also possible to change the milking force intermittently instead of a continuous weak milking force. In this case, as shown in FIG. 13, press the pressure release (45). Then, the valve stem (42) that is hitting the recess (45c) of the pressure release (45)
moves inward against the compression force of the compression coil spring (41). The tapered surface (42a) of the valve stem (42) and the valve seat (43c) of the diaphragm (43) are separated by a large distance, allowing outside air to flow from the outside air introduction hole (44e) (27b) to the mounting body (
Air flows into the air suction hole (27a) of 27). Then, the suction pressure inside the bottle (A) disappears instantly, and the milking power also disappears. When the pressure release 10 (45) is released, the valve stem (4) is released by the compression force of the compression coil spring (41).
2) is urged outward, and again the tapered surface (42a) of the valve stem (42) and the valve seat portion (43c) of the diaphragm (43)
are in close contact with each other, and the suction pressure inside the bottle (A) increases. Therefore, due to the intermittent pressing operation of the pressure release device (45), the suction pressure inside the bottle (A) changes intermittently, giving appropriate stimulation to the nipple, just in time for the baby to suck. You can express milk in the same way.

Each of the above operations can be performed with one hand because the pressure release (45) and pressure adjustment knob (46) are installed on the lower side of the suction part (C), and the other hand can be used around the outer circumference of the breast. It can be used to massage or help with milking.

The above describes one embodiment of the present invention, and the present invention is not limited to this embodiment, and the design can be changed within the gist of the present invention.

According to the present invention, the number of parts for the pressure adjustment mechanism and the negative pressure generating part is reduced to about half of the conventional one, and the shape of each part is made simple, thereby reducing manufacturing costs. can be achieved.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional front view of the main parts of a breast pump showing an embodiment of the present invention, Fig. 2 is an exploded longitudinal sectional front view of the negative pressure generating part of the pressure adjustment mechanism inside the breast pump, and Fig. 3 is a mounting body. Fig. 4 is a vertical side view of the valve stem, Fig. 5 is a left side view of the diaphragm, Fig. 6 is a right side view of the cap, Fig. 7 is a top view for pressure release, Fig. 8 is a right side view of the pressure release device, FIG. 9 is a right side view of the pressure adjustment knob, FIGS. 10 to 13 are cross-sectional views of the pressure adjustment mechanism and negative pressure generator, and FIG. 10 is the inside of the bottle. Fig. 11 is a state diagram when the sucked air is being discharged, Fig. 12 is a state diagram when the milking force is weakened by rotating the pressure adjustment knob, and Fig. 13 is a state diagram when the milking force is weakened. It is a state diagram when pressing the pressure release button to eliminate milking force. FIG. 14 is an overall perspective view of the breast pump according to the earlier application;
Figure 5 is a partially cutaway longitudinal sectional front view of the breast pump according to the earlier application;
FIG. 16 is an exploded longitudinal sectional front view of the pressure adjustment mechanism and negative pressure generating part of the breast pump according to the prior application, FIG. 17 is a longitudinal sectional side view of the pressure adjustment screw, and FIG. 18 is a longitudinal sectional side view of the pressure adjustment knob.
Figure 19 is a vertical side view of the combination of pressure adjustment screw and pressure adjustment knob, Figure 20 is a right side view of the mounting body, and Figure 20 is a right side view of the mounting body.
1 is a left side view of the diaphragm, and FIG. 22 is a left side view of the cap. (A) ---- Bottle, CB) - Milking part, (C) - Suction part, (D) - Pressure adjustment mechanism (E) - Negative pressure generating part, (27) - Mounting body, (27b) -----One outside air introduction hole, (41)・
- Compression coil spring, (42) ----・Valve stem,
(42a) ---Taber surface, (43) ---Diaphragm, (43c) --Valve seat, (44L --- Cap, (44b) --Suction chamber, (45) --Pressure release button, (45a) -Cam surface, (46) -Pressure adjustment knob.Representative Mr. Gohara Shogo11-Figure 1

Claims (1)

[Claims] (1) A breast pump that vertically connects a bottle that stores expressed breast milk, a milking part that presses against the breast, and a suction part that is equipped with a pressure adjustment mechanism and a negative pressure inducing part that create negative pressure inside the bottle. In the above, the pressure adjustment mechanism and the negative pressure generating part are connected to a diaphragm having a mounting body having an outside air introduction hole, a compression coil spring, a valve stem having a tapered surface, and a valve seat part that can be brought into close contact with the tapered surface. and a cap that forms an intake chamber between the diaphragm and the diaphragm, a pressure release button that has a cam surface and blocks the valve stem, and a pressure adjustment knob that applies a pressing force to the cam surface. Characteristic breast pump.