CN116801923B - Medical aspirator and canister for medical aspirator - Google Patents

Abstract

The technical problem is to provide a can body capable of releasing the airtight inside the can body and easily opening the cover part, and easily taking out the accommodating bag and a medical aspirator comprising the can body. The jar body characterized in that includes: a tank body for accommodating an accommodating bag capable of accommodating waste liquid; a lid portion for opening and closing an opening portion which opens at a part of the tank body, and having a pressure release hole for releasing negative pressure in the tank body; and a pressure release mechanism having a lever which is rotatably installed around a fulcrum provided in the lid portion, and a biasing member which is disposed in the lid portion and biases one end of the lever in a direction away from the lid portion, wherein when a force applied to one end of the lever is released, the other end of the lever seals the pressure release Kong Yajie to keep the inside of the can airtight.

Description

Medical suction device and canister for medical suction device

Technical Field

The present invention relates to a medical suction device for sucking waste liquid including body fluid and secretion of a patient and a tank body for the medical suction device.

Background technique

In medical institutions such as hospitals and clinics, various medical suction devices are installed in operating rooms and wards. For example, the medical suction devices suck and coagulate waste fluids such as body fluids including blood produced during surgery and physiological saline used to wash the affected part. In addition, in the ward, the patient's secretions including sputum are sucked and coagulated as waste fluids.

For example, as disclosed in Patent Document 1, a medical suction device used in a medical institution includes: a container (tank body) which is kept airtight by closing a lid and stores a storage bag containing aspirated waste fluid; and a container holder which detachably mounts and holds the container. In general, suction pressure is applied to the inside of the container, and body fluids, secretions, etc. are sucked from the affected part using a suction tube attached to the lid and stored in a storage bag, where they are solidified and each solidified storage bag is disposed of.

Prior art literature

Patent Literature

Patent Document 1: Japanese Patent Application Publication No. 2015-024085

Summary of the invention

Technical problem to be solved by the invention

However, when the lid is opened to take out the storage bag stored in the container, there is a problem that the lid cannot be easily opened because the inside of the container is airtightly maintained at a negative pressure.

In the present invention, the technical problem is to provide a tank body for a medical suction device and a medical suction device including the tank body, which can release the airtightness inside the container (tank body) and easily open the lid part, and can easily take out the storage bag after suction.

Technical solutions adopted to solve technical problems

The can body for the medical suction device according to the present invention is

A tank body for a medical suction device, which is used to remove waste liquid by suction, is characterized by comprising:

A tank body, wherein the tank body accommodates a storage bag capable of storing waste liquid;

a cover that opens and closes an opening that is partially opened in the can body and has a pressure release hole that releases negative pressure inside the can body; and

The pressure release mechanism comprises a rod and a force applying member, wherein the rod is installed to be rotatable around a fulcrum provided on the cover portion, and the force applying member is fixed to the cover portion and applies force to one end of the rod in a direction away from the cover portion.

When force is applied to one end of the rod and the rod is pressed inward, the rod rotates around the fulcrum and the other end of the rod separates from the pressure relief hole, thereby releasing the negative pressure inside the tank.

When the force applied to one end of the rod is released, the rod is pressed back by the force-applying member, one end of the rod rotates outward with the fulcrum as the center, and the other end of the rod presses and seals the pressure relief hole to keep the interior of the tank airtight.

Furthermore, the can body for the medical suction device according to the present invention is

A medical suction device for removing waste liquid by suction, characterized in that it comprises:

A tank body, wherein the tank body accommodates a storage bag capable of storing waste liquid;

a cover that opens and closes an opening that is partially opened in the can body and has a pressure release hole that releases negative pressure inside the can body; and

The pressure release mechanism comprises a rod, a force applying member, a rod-shaped body and a sealing member, wherein the rod is installed to be rotatable around a fulcrum provided on the cover, the force applying member is fixed to the cover and applies force to one end of the rod in a direction away from the cover, the rod-shaped body is inserted into the pressure release hole and can move along the extension direction, and there is a gap between the rod-shaped body and the peripheral wall of the pressure release hole for ventilation, and the sealing member is provided at the end of the rod-shaped body and blocks the pressure release hole to keep the interior of the tank body airtight,

When force is applied to one end of the rod and the end of the rod is pressed inward, the rod rotates around the fulcrum to move the rod-shaped body inward, separating the sealing component from the pressure relief hole, thereby releasing the negative pressure inside the tank body.

When the force applied to one end of the rod is released, the rod is pressed back by the force applying member and rotates around the fulcrum, so that the rod-shaped body moves outward, and the sealing component presses and seals the pressure release hole to keep the interior of the tank airtight.

If the tank body used for the medical suction device of the present invention, the negative pressure inside the tank body can be reliably kept airtight. In addition, the negative pressure inside the tank body can be easily released as needed to easily open the lid, and the storage bag accommodated in the tank body and completed by suction can be easily taken out.

The can body main body of the can body for the medical aspirator according to the present invention includes a rod receiving portion into which the other end of the rod is fitted to fix the cover portion to the can body main body.

According to the can body of the present invention, the lid portion can be more reliably closed, thereby airtightly maintaining the negative pressure inside the can body.

The medical suction device according to the present invention is characterized in that it comprises the can body according to the present invention.

According to the medical aspirator of the present invention, waste liquid can be reliably removed by suction, and the storage bag after waste liquid suction, which is stored in the tank body, can be easily replaced.

Effects of the Invention

If the tank body and medical suction device according to the present invention are used, a tank body and a medical suction device including the tank body can be provided, which can break the airtight state inside the tank body and release the negative pressure, and can easily remove the storage bag in which the waste liquid is suctioned and stored.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a perspective view showing a use state of an aspirator according to a first embodiment of the present invention.

FIG. 2 is a perspective view showing a storage state of the storage bag of the aspirator according to the first embodiment of the present invention.

FIG. 3 is a front view of the aspirator according to the first embodiment of the present invention.

FIG. 4 is a right side view of the aspirator according to the first embodiment of the present invention.

5 is a cross-sectional view of the aspirator according to the first embodiment of the present invention, viewed along the arrow A-A direction of FIG. 3 .

6 is an enlarged cross-sectional view of the closed state of the pressure release mechanism of the aspirator according to the first embodiment of the present invention, viewed in the direction of arrow E-E of FIG. 4(A) .

7 is an enlarged cross-sectional view of the open state of the pressure release mechanism of the aspirator according to the first embodiment of the present invention, viewed in the direction of arrows F-F in FIG. 4(B) .

8 is a right side view, a rear view, and a top view of the aspirator according to the second embodiment of the present invention.

9 is an enlarged cross-sectional view of the closed state of the pressure release mechanism of the aspirator according to the second embodiment of the present invention, viewed along the arrow G-G direction of FIG. 8(C) .

10 is an enlarged cross-sectional view of the open state of the pressure release mechanism of the aspirator according to the second embodiment of the present invention, viewed in the direction of arrows G-G in FIG. 8(C) .

Symbol Description

1 Attractor

2 Pressure regulator

3 Tank

4 Mounting parts

5 Storage Bag

6 Exhaust hose

11 Piping panel

21 Pressure regulator body

22 Pressure adjustment knob

23 Exhaust port

24 Connection port

25 Shell

26 Switch lever

28 Tank receiving part

51 Tank body

52A Cover

52B Cover

53 Tank exhaust port

54 Nozzle through hole

55 Window

56 Concave

57 Positioning guide

58 Tank mounting parts

59 Ball Plug

60 Opening

61 Pressure relief hole

62 Rod receiving part

81 Bag

82 pipe mouth

83 Nozzle

84 Bag exhaust port

85 Flange

86 flange recess

101 Release components

102 Pivot Point

103 bars

104 Force Applicator

105 rod-shaped body

106 Sealing parts

107 Seals

111 One end

112 The Other End

113 protrusion

Detailed ways

Hereinafter, a first embodiment of a medical suction device 1 (hereinafter referred to as "suction device") and a tank body 3 (hereinafter referred to as "tank body") for the medical suction device for suctioning and removing waste fluids such as body fluids and secretions of a patient according to the present invention will be described. In addition, the waste fluids include body fluids including blood generated during surgery that are suctioned and disposed of, physiological saline used for washing the affected part, or secretions of the patient including sputum.

FIG1 shows the use state of the suction device 1 according to the present embodiment. FIG2 shows a stereoscopic view of the storage state of the storage bag 5 of the suction device 1 according to the embodiment of the present invention. FIG3 shows the front view of the suction device 1 according to the embodiment of the present invention, and FIG4 shows the right side view of the suction device 1 according to the embodiment of the present invention. In addition, FIG5 is a cross-sectional view of the suction device 1 according to the embodiment of the present invention observed along the arrow A-A direction of FIG3.

The suction device 1 is composed of a pressure regulator 2, a tank body 3 and a mounting member 4. The suction device 1 is mounted on a support member (not shown) via a mounting member 4 arranged on the back of the pressure regulator 2, and the support member is arranged on a piping panel 11 on the wall of the ward and supports the pressure regulator 2. The pressure regulator 2 is composed of a pressure regulator body 21 and a shell 25 in which the pressure regulator body 21 is built. A pressure adjustment knob 22 is provided on the front surface of the shell 25, and a switch rod 26 is provided on the right side of the shell 25. An exhaust port 23 is provided on the left side of the shell 25. The exhaust port 23 is connected to an exhaust hose 6. The exhaust hose 6 is connected to a suction port (not shown) of the piping panel 11, and the suction port (not shown) is connected to a suction pump (not shown) via a piping. In addition, the bottom surface of the shell 25 is provided with: a connection port 24, which is connected to the tank exhaust port 53 of the tank body 3; and a tank body receiving member 28, which fixes the tank body 3.

The air inside the tank 3 is exhausted by a suction pump (not shown) through the tank exhaust port 53, the connection port 24, the pressure regulator body 21, the exhaust port 23, the exhaust hose 6, the suction port (not shown), and the pipe.

The pressure regulating knob 22 is a cylindrical body rotatably mounted on the front surface of the housing 25. By rotating the pressure regulating knob 22, the pressure of the waste liquid can be set to a specified negative pressure (-5, -10, -20, -30, -40, -50, -60 kPa). The pressure regulator body 21 adjusts the pressure of the waste liquid to a specified negative pressure according to the setting of the pressure regulating knob 22. In addition, the switch rod 26 switches the suction on and off (ON-FF). In addition, the negative pressure of the waste liquid (-5, -10, -20, -30, -40, -50, -60 kPa) is not limited to these negative pressures, and can be any set value.

In addition, as long as there is no obstruction when using the suction device 1, the positions of the pressure adjustment knob 22, the switch rod 26 and the exhaust hose 6 are not limited. In addition, the piping panel 11 is not limited to being installed on the wall of the ward, for example, it can also be installed on the wall of the operating room. In addition, the suction device 1 is not limited to being installed on the piping panel 11, and can also be installed on a support bracket (not shown).

The tank body 3 is installed below the pressure regulator 2. The tank body 3 is a cylindrical body extending in the vertical direction with an elliptical horizontal cross section, and the direction perpendicular to the wall surface is the major diameter of the ellipse. In addition, the minor diameter of the front side of the horizontal cross section of the tank body 3 is shorter than the minor diameter of the rear side. The minor diameter of the front side is about 6.5 cm, which is a size that is easy for people with small hands to grasp.

In addition, the tank body 3 includes: a tank body main body 51, which can be detachably mounted in the horizontal direction to store the storage bag 5, and the storage bag 5 can separate and store the sucked waste liquid and the gas sucked together with the waste liquid; and a cover 52A, which is provided at the opening 60 opened on the right side of the tank body 3 and can be opened and closed in the horizontal direction. The cover 52A is mounted on the tank body 51 by a hinge and can be opened and closed in the horizontal direction. When the cover 52A is opened, the storage bag 5 stored in the tank body 3 can be taken out in the horizontal direction.

The tank body 51 has a tank body mounting part 58, a ball plug 59 and a tank body exhaust port 53 provided on the upper surface of the tank body 51. The ball plug 59 is composed of a tool coil spring 71 and a ball 72. The tool coil spring 71 is mounted on the upper surface of the tank body 51, and the ball 72 is rotatably mounted on the upper end of the tool coil spring 71. On the other hand, the tank body exhaust port 53 is airtightly connected to the connection port 24.

The cover 52A closes the opening 60 on the left side of the tank body 51, thereby airtightly maintaining the negative pressure inside the tank body 3. Since the inside of the tank body 3 is under negative pressure, the tank body 51 and the cover 52A can be made of rigid bodies that are strong enough not to be deformed by the negative pressure, for example, resin. In addition, the cover 52A is provided with a pressure release hole 61 that penetrates the cover 52A and releases the negative pressure inside the tank body 3.

The storage bag 5 is composed of a bag body 81 and a nozzle 82, wherein the bag body 81 contains a coagulant (not shown) for solidifying the waste liquid sucked together with the air, and the nozzle 82 is airtightly joined to the upper part of the bag body 81. The nozzle 82 has: a nozzle 83, which is connected to a suction hose (not shown) for sucking the waste liquid; and a bag body exhaust port 84, which discharges gas from the inside of the bag body 81. In addition, a hydrophobic filter (not shown) is arranged at the bag body exhaust port 84. The hydrophobic filter (not shown) can discharge only the gas from the tank body 3 by separating the waste liquid from the gas and preventing the waste liquid from flowing out of the storage bag 5.

A nozzle through hole 54 through which the nozzle 83 passes is provided at the upper portion of the front surface of the can body 3 at the position where the can body main body 51 and the cover 52A contact each other. In addition, a pressure release mechanism 101 for airtightly locking the cover 52A to the can body main body 51 is provided at a position substantially in the center of the can body 3 where the can body main body 51 and the cover 52A contact each other. A protruding positioning guide 57 is provided at a position close to the nozzle through hole 54 on the outer side surface of the can body main body 51. The positioning guide 57 is located at a position corresponding to the flange recess 86 provided on the flange 85 of the nozzle 83 to ensure airtightness inside the can body 3. By fitting the flange recess 86 into the positioning guide 57, the nozzle 83 is guided to a predetermined position and the storage position of the storage bag 5 is determined, so that the airtight state inside the can body 3 is reliably maintained.

Fig. 4 (A) is a right side view showing a closed state of the pressure release mechanism 101 of the suction device 1 according to the embodiment of the present invention, and Fig. 4 (B) is a right side view showing an open state of the pressure release mechanism 101 of the suction device 1 according to the embodiment of the present invention. In addition, Fig. 6 is an enlarged cross-sectional view of the closed state of the pressure release mechanism 101 observed along the arrow E-E direction of Fig. 4 (A), that is, observed from the bottom surface of the tank body 3 upward, and Fig. 7 is an enlarged cross-sectional view of the open state of the pressure release mechanism 101 observed along the arrow F-F direction of Fig. 4 (B).

The pressure release mechanism 101 includes a rod 103 that rotates around a fulcrum 102 and a biasing member 104. The fulcrum 102 is located substantially in the middle of the rod 103 in the longitudinal direction, and the rod 103 is rotatably attached to the cover 52A at the fulcrum 102.

The urging member 104 is disposed at one end 111 of the rod 103. The urging member 104 urges and presses the one end 111 of the rod 103 toward the outside. The urging member 104 may be any member as long as it can urge the rod 103, and may be, for example, a tool coil spring or a leaf spring.

The other end 112 of the rod 103 has a seal 107 that presses and seals the pressure relief hole 61 provided in the tank body 51, and a protrusion 113 that is provided at the other end 112 and engages with the rod receiving portion 62 provided in the cover portion 52A. The seal 107 is pressed toward the pressure relief hole 61 by the force applying member 104, thereby sealing the pressure relief hole 61 to keep the inside of the tank body 3 airtightly under negative pressure. In addition, if the seal 107 is an elastic body, such as natural rubber, silicone, etc., it can reliably seal the pressure relief hole 61 to keep the inside of the tank body 3 airtight, which is more preferred.

Next, a method of using the aspirator 1 according to the first embodiment will be described.

First, the preparation for removing the waste liquid by suction is described. The storage bag 5 is stored in the tank body 4 and the lid 52A is closed. Then, the tank body 3 is mounted on the pressure regulator 2 by inserting the tank body mounting member 58 toward the wall surface into the tank body receiving member 28 on the lower surface of the housing 25 so as to engage with the tank body receiving member 28. When the tank body mounting member 58 is engaged with the tank body receiving member 28 on the lower surface of the housing 25, the ball 72 at the upper end of the ball plug 59 is pressed toward the lower surface of the housing 25 by the tool coil spring 71 disposed below the ball 72, and the housing 25 and the pillar head 51 are assembled airtightly.

Next, the suction device 1 is mounted on the pipe panel 11 on the wall via the mounting member 4, and the exhaust hose 6 is connected to the suction port (not shown) of the pipe panel 11. Then, the suction hose (not shown) is mounted on the nozzle 83 of the storage bag 5 protruding from the front surface of the tank body 3.

Then, the pressure adjustment knob 22 is used to set the specified suction pressure. Next, the switch lever 26 is set to the open position to start suction. In this way, the air inside the tank body 3 is discharged from the suction port (not shown) of the piping panel 11 through the tank body exhaust port 53, the connection port 24, the pressure regulator body 21, the exhaust port 23, and the exhaust hose 6, and the inside of the tank body 3 becomes negative pressure. The air inside the storage bag 5 is also discharged from the bag body exhaust port 84, and the inside of the storage bag 5 also becomes negative pressure.

After the preparation for suction and removal of the waste liquid is completed, the front end of the suction hose (not shown) connected to the nozzle 83 is arranged at the desired position, and suction and removal of the waste liquid from the patient begins. The sucked waste liquid is sucked into the storage bag 5 together with the air through the suction hose (not shown) and the nozzle 83. The hydrophobic filter (not shown) arranged at the bag body exhaust port 84 does not allow the waste liquid to pass through, so the sucked waste liquid accumulates inside the storage bag 5. The waste liquid separated from the air reacts with the coagulant in the storage bag 5 and solidifies. On the other hand, the air passes through the hydrophobic filter (not shown) and is discharged by the suction pump (not shown) through the bag body exhaust port 84, the tank exhaust port 53, the connecting port 24, the pressure regulator body 21, the exhaust port 23, the exhaust hose 6, and the suction port (not shown) of the piping panel 11. In addition, the hydrophobic filter (not shown) disposed at the bag exhaust port 84 blocks the waste liquid from passing through the filter, thereby preventing the waste liquid from flowing out of the storage bag 5 and flowing into the suction pump (not shown) through the pressure regulator body 21 .

When a constant amount of waste liquid is sucked and accumulated in the storage bag 5 , the switch lever 26 is set to the off position to stop the suction and replace the storage bag 5 .

Here, when the pressure release mechanism 101 is closed, the rod 103 is urged by the urging member 104, the protrusion 113 is engaged with the rod receiving portion 62 provided on the tank body 51, and the cover 52A is fixed and not opened. In addition, the other end 112 presses the sealing member 107 toward the pressure release hole 61 provided on the tank body 51 to seal, so as to keep the interior of the tank body 3 airtight.

When the cover 52A is opened to take out the storage bag 5 from the can body 3, if a force is applied to one end 111 of the rod 103 to press, the rod 103 rotates counterclockwise in the diagram of FIG. 6 with the fulcrum 102 as the center, so that the seal 107 is separated from the pressure relief hole 61 as the rod 103 rotates. By separating the seal 107 from the pressure relief hole 61, the pressure relief hole 61 is opened (refer to FIG. 7). By opening the pressure relief hole 61, air flows into the inside of the can body 3 through the pressure relief hole 61, so that the inside of the can body 3 reaches atmospheric pressure. On the other hand, the protrusion 113 is separated from the rod receiving portion 62, so that the cover 52A can be opened. The cover 52A is opened in the horizontal direction, the nozzle 83 of the storage bag 5 is removed from the nozzle through-hole 54, and after the storage bag 5 is taken out in the horizontal direction, the storage bag 5 is disposed of.

After that, the flange recess 86 of the flange 85 of the nozzle 83 provided on the new storage bag 5 is assembled correspondingly with the positioning guide 54 of the nozzle through hole 54, so that the storage bag 5 is stored in the can body 3. Then, the cover 52A is closed, and the one end 111 of the rod 103 is released. When the force is no longer applied to the one end 111, the rod 103 is forced by the force applying member 104 so that the one end 111 of the rod 103 is pressed back toward the outside, thereby rotating counterclockwise in the figure of FIG. 6 with the fulcrum 102 as the center, that is, the one end 111 of the rod 103 rotates toward the outside. The rod 103 is forced by the force applying member 104, so that the protrusion 113 is pressed and fits with the rod receiving portion 62 provided on the cover 52A, and the cover 52A is fixed and not opened (refer to FIG. 6).

Next, a second embodiment of the medical suction device 1 for removing waste fluids such as body fluids and secretions of a patient by suction and a can body 3 for the medical suction device according to the present invention will be described.

Fig. 8 (A) is a right side view of the suction device 1 according to the second embodiment of the present invention, Fig. 8 (B) is a rear view, and Fig. 8 (C) is a top view. In addition, only the parts that are different from the first embodiment and the second embodiment are described, and the description of the same points as the first embodiment is omitted.

The suction device 1 is composed of a suction device body (not shown) and a tank body 3, wherein the suction device body has an electric suction pump (hereinafter referred to as "suction pump") built therein, and the tank body 3 accommodates a storage bag 5 capable of accommodating patient waste fluid, and the tank body 3 is arranged on a tank body support portion (not shown) provided on the suction device body. In addition, the suction device body (not shown) can be moved to any place where the suction device 1 is used without being fixed to a wall of a ward or the like.

The tank body 3 includes: a tank body main body 51, which accommodates a storage bag 5 capable of storing patient waste fluid; a cover 52B, which closes an opening 60 opened in a part of the tank body 51; and a pressure release mechanism 101. In addition, the tank body 51 is provided with a pressure release hole 61 that penetrates the tank body 51 and releases the negative pressure inside the tank body 3.

If the tank body 51 is transparent or translucent, the inside of the tank body 3 can be visually confirmed, and the state of the storage bag 5 stored in the tank body 3 can be confirmed, which is more preferable. The left side of the tank body 3 at the position where the tank body 51 contacts the cover 52B has a nozzle through hole 54 for the nozzle 83 to pass through. The front surface of the tank body 51 at the position where the cover 52B contacts has a pressure release mechanism 101 for airtightly locking the cover 52B to the tank body 51.

9 is an enlarged cross-sectional view of the pressure release mechanism 101 in a closed state, as viewed in the direction of arrows G to G in FIG. 8C , and FIG. 10 is an enlarged cross-sectional view of the pressure release mechanism 101 in an open state.

The pressure release mechanism 101 includes a rod 103, a force applying member 104, a rod-shaped body 105, and a sealing member 106. The rod 103 is provided on the cover 52B and is mounted to be rotatable around the fulcrum 102. The force applying member 104 is fixed to the cover 52B and applies force to one end of the rod 103 in a direction away from the cover 52B. The rod-shaped body 105 passes through the pressure release hole 61 provided on the cover 52B. The sealing member 106 is provided at the end of the rod-shaped body 105 and blocks the pressure release hole 61. The fulcrum 102 is located at the approximately central portion in the longitudinal direction of the rod 103 and is mounted on the cover 52A. There is a gap between the peripheral wall of the pressure release hole 61 and the rod-shaped body 105 for ventilation, and the rod-shaped body 105 is inserted into the pressure release hole 61 so as to be movable in the extension direction.

A rod-shaped body 105, a force applying member 104, a sealing member 106, and a sealing member 107 are arranged at one end 111 of the rod 103. The outer end of the rod-shaped body 105 contacts the inner side of the one end 111, and the inner end of the rod-shaped body 105 is connected to the sealing member 106. The sealing member 107 having an O-shaped cross section is arranged on the surface of the sealing member 106 that contacts the cover 52B, and the sealing member 107 is pressed against the cover 52B, thereby hermetically sealing the gap between the peripheral wall of the pressure release hole 61 and the rod-shaped body 105 that allows ventilation (see FIG. 9 ).

The other end 112 of the rod 103 has a protrusion 113 that fits with the rod receiving portion 62 provided on the tank body 51. By causing the one end 111 to be urged outward by the urging member 104, the protrusion 113 is urged inward and reliably fits with the rod receiving portion 62. In addition,

Next, a method of using the aspirator 1 according to the second embodiment will be described.

The exhaust port 23 of the tank body 3 containing the storage bag 5 is connected to the suction pump (not shown) of the suction device body (not shown) via the exhaust hose 6 (not shown). Next, the suction hose is installed on the nozzle 83 (not shown) of the storage bag 5 protruding from the side of the tank body 3, and the suction pump is operated at a specified pressure to start suction. In this way, the air inside the tank body 3 is discharged by the suction pump through the exhaust port 23 and the exhaust hose 6, and the inside of the tank body 3 becomes a negative pressure. The air inside the storage bag 5 is also discharged from the bag body exhaust port 84, and the inside of the storage bag 5 also becomes a negative pressure.

After the preparation for the suction removal of the waste liquid is completed, the front end of the suction hose (not shown) connected to the nozzle 83 is arranged at the desired position, and the suction removal of the waste liquid from the patient is started. The sucked waste liquid is sucked into the storage bag 5 together with the air through the suction hose (not shown) and the nozzle 83. The hydrophobic filter (not shown) arranged at the bag exhaust port 84 does not allow the waste liquid to pass through, so the sucked waste liquid accumulates inside the storage bag 5. The waste liquid separated from the air is decomposed in the storage bag 5, and the waste liquid accumulates in the storage bag 5, reacts with the coagulant and solidifies. On the other hand, the air passes through the hydrophobic filter (not shown) and is discharged by the suction pump through the bag exhaust port 84, the tank exhaust port 53, the connecting port 24, the pressure regulator body 21, the exhaust port 23, and the exhaust hose 6. In addition, the hydrophobic filter (not shown) arranged at the bag exhaust port 84 prevents the liquid of the waste liquid from passing through the filter, which can prevent the waste liquid from flowing out of the storage bag 5 and flowing into the suction pump through the pressure regulator body 251.

When a constant amount of waste liquid is sucked and accumulated in the storage bag 5 , the operation of the suction pump (not shown) is stopped, the suction is stopped, and the storage bag 5 is replaced.

Here, when the pressure release mechanism 101 is closed, the rod 103 is urged by the urging member 104, the protrusion 113 is engaged with the rod receiving portion 62 provided on the cover 52B, and the cover 52B is fixed and not opened. In addition, the other end 112 of the rod 103 is urged by the urging member 104 to pull the sealing member 106 outward via the rod-shaped body 105, and press the sealing member 107 toward the cover 52B to seal, thereby maintaining negative pressure inside the can body 3 in an airtight manner (refer to FIG. 9 ).

Next, a method for opening the lid 52B to take the storage bag 5 out of the tank body 3 is described. First, when a force is applied to one end 111 of the rod 103 to press, the rod 103 rotates the one end 111 inwardly with the fulcrum 102 as the center, and the sealing member 106 moves inwardly via the rod-shaped body 105. Along with this, the sealing member 107 is separated from the lid 52B, so that air flows into the interior of the tank body 3 through the gap between the peripheral wall of the pressure relief hole 61 and the rod-shaped body 105, so that the interior of the tank body 3 reaches atmospheric pressure. In addition, the protrusion 113 is detached from the rod receiving portion 62, so that the lid 52B can be opened (refer to Figure 10). The lid 52B is opened upward, the nozzle 83 of the storage bag 5 is removed from the nozzle through hole 54 (not shown), and after taking out the storage bag 5, the storage bag 5 is discarded.

After that, the nozzle 83 of the new storage bag 5 is assembled to the nozzle through hole 54, so that the storage bag 5 is stored in the tank body 3. Then, the lid 52B is closed, and when the force applied to the one end 111 of the rod 103 is released, the rod 103 is pressed back by the force applying member 104, and rotates in the opposite direction around the fulcrum 102, so that the rod-shaped body 105 moves outward. In conjunction with this, the sealing member 106 presses and seals the pressure release hole 61, and the inside of the tank body 3 is kept airtight. In addition, by fitting the protrusion 113 with the rod receiving portion 62 provided on the lid 52B, the lid 52B is fixed and not opened (refer to FIG. 10).

The present invention has been described above using the embodiments, but the technical scope of the present invention is not limited to the scope described in the above embodiments. It is obvious to those skilled in the art that various changes or improvements can be made to the above embodiments. It is obvious from the description of the claims that the method to which such changes or improvements are made is also included in the technical scope of the present invention.

Claims (3)

1. A tank for medical aspirator, which is characterized in that waste liquid is sucked and removed,

Comprising the following steps: a tank body, a cover part and a pressure release mechanism,

The tank body is provided with a containing bag capable of containing the waste liquid;

The cover part opens and closes an opening part which is opened at a part of the tank body and is provided with a pressure release hole for releasing negative pressure in the tank body; and

The pressure release mechanism has a lever, a force application member, a rod-like body, a seal member, and a seal member,

The lever is mounted so as to be rotatable about a fulcrum provided to the cover portion,

The force application member is disposed on the cover portion and applies force to one end of the lever in a direction away from the cover portion,

The rod-shaped body is inserted into the pressure release hole and movable in the extending direction with a gap between the rod-shaped body and the peripheral wall of the pressure release hole capable of ventilation,

The sealing member is provided at an end of the rod-shaped body and blocks the pressure release hole to keep the inside of the can airtight,

The sealing member is biased by the biasing member, and presses the sealing member against the lid portion to seal the interior of the can body, thereby hermetically maintaining a negative pressure in the can body,

The rod-shaped body, the force application member, the sealing member, and the sealing member are disposed at one end of the rod,

The outer end of the rod-shaped body is contacted with the inner side of one end of the rod, the inner end of the rod-shaped body is connected with the sealing component,

When a force is applied to one end of the lever so that the one end of the lever is pressed in an inward direction, the lever rotates about the fulcrum to move the rod-like body inward, separating the seal member and the seal from the pressure release hole, whereby negative pressure in the interior of the tank is released,

When released from the force applied to one end of the rod, the rod is pushed back by the force application member to rotate about the fulcrum, causing the rod-like body to move outward, and the seal member seal the pressure relief Kong Yajie to keep the inside of the tank airtight.

2. The can body of claim 1, wherein the can body has a stem receiving portion for receiving the other end of the stem to secure the lid to the can body.

3. A medical aspirator comprising the canister according to claim 1 or 2.