TWM477889U - Pressure control mechanism of suction device - Google Patents

Description

Pressure control mechanism of suction device

The present invention relates to a suction device, and more particularly to a pressure control mechanism for a suction device.

The conventional suction device provides a negative pressure at the time of suction by a negative pressure mechanism, and a pressure control mechanism is provided at one end of the negative pressure mechanism to control the magnitude of the negative pressure. The pressure control mechanism generally includes a chamber connected between the negative pressure mechanism and the suction conduit, and controls the movement or closing of the negative pressure mechanism and the suction conduit through the movement of a piston body in the chamber to perform pumping Suction work.

However, since the piston body of the conventional pressure control mechanism prevents leakage of pressure, the entire side surface thereof is in close contact with the wall surface of the chamber to form airtightness, which causes a large frictional resistance with the wall surface, making the movement of the piston body difficult. It is difficult to control accurately, which is not conducive to the execution of the suction operation.

Therefore, the purpose of the present invention is to provide a pressure control mechanism for the suction device, which can reduce the frictional resistance between the piston body and the inner wall surface of the body, so as to facilitate the suction operation.

The present invention provides a pressure control mechanism for a suction device, which comprises a body and a piston body. The body has an accommodation space, and the accommodation space is connected to two sets. a tube, the piston body is movably disposed in the accommodating space, wherein the at least one sleeve has an oblique communication port, the piston body has an oblique side surface, and the piston body is at a first position of the oblique side The surface is fitted and closed to the oblique communication port, or the piston body is in a second position The oblique side surface is separated from the oblique communication port to electrically connect the two sleeves to the accommodating space.

In an embodiment of the present invention, a pressure control mechanism is provided, the oblique side surface being an annular oblique side surface.

In one embodiment of the present invention, a pressure control mechanism is provided having two oblique communication ports and the piston system having two oblique side surfaces.

In an embodiment of the present invention, a pressure control mechanism is provided, the two oblique communication ports being at the same level.

In an embodiment of the present invention, a pressure control mechanism is provided, the oblique side surface is an arc-shaped oblique side surface, and the oblique communication port is an arc-shaped oblique communication port, and the arc shape The diagonal side surfaces correspond to each other.

In an embodiment of the present invention, a pressure control mechanism is further provided, further comprising a pushing member disposed in the accommodating space and connected between the piston body and a base of the body, so that the piston body is subjected to the The pushing member pushes against the normal movement and the oblique side surface is fitted to close the two oblique communication ports.

In an embodiment of the present invention, a pressure control mechanism is provided, the pusher member being a spring.

In an embodiment of the present invention, a pressure control mechanism is further provided, further comprising a pressing member disposed on a top of one of the piston bodies, wherein the piston system is pressed by the pressing member to separate the oblique side surface from the second An oblique communication port connects the two sleeves to the accommodating space.

In an embodiment of the present invention, a pressure control mechanism is provided, the piston body further having a constricted annular surface located between a top of the piston body and the oblique side surface, and the oblique side surface is separated from the oblique side surface In the two oblique communication ports, the constricted annular surface is located between the two oblique communication ports to make the two sleeves communicate with the accommodating space.

In an embodiment of the present invention, a pressure control mechanism is provided. The piston body further includes a stop member disposed on the top of one of the piston bodies and having a stop ring surface attached to an inner wall surface of the body.

The pressure control mechanism of this creation has the following effects. The frictional resistance between the piston body and the inner wall surface of the body and the piston body and the two sleeves is reduced by the oblique side surface and the oblique communication port, so that the piston body can be flexibly moved in the housing space of the body, so The negative pressure mechanism and the suction duct can be controlled to be electrically connected or closed via a pressure control mechanism, so that the suction operation can be smoothly performed.

The specific embodiments of the present invention will be further described by the following examples and accompanying drawings.

100‧‧‧pressure control mechanism

1‧‧‧ Ontology

11‧‧‧ wall

111‧‧‧ inner wall

12‧‧‧Base

13‧‧‧ casing

131, 132‧‧‧ oblique communication port

2‧‧‧ piston body

21‧‧‧ oblique side surface

22‧‧‧ top

23‧‧‧Necked torus

24‧‧‧Stops

3‧‧‧Pushing components

4‧‧‧ Pressing members

200‧‧‧Drawing device

201‧‧‧ gas-cut connecting tube

202‧‧‧Attraction catheter

D1‧‧‧ first direction

D2‧‧‧ second direction

H‧‧‧level height

S‧‧‧ accommodating space

1 is a schematic view showing a pressure control mechanism of a suction device according to an embodiment of the present invention when closed; and FIG. 2 is a view showing a pressure control mechanism of the suction device according to an embodiment of the present invention being turned on. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 3 is a schematic view showing the use of a pressure control mechanism of the suction device according to an embodiment of the present invention.

Embodiments of the present creation will be described below based on Figs. 1 to 3 . This description is not intended to limit the implementation of the present invention, but is one of the embodiments of the present invention.

As shown in FIGS. 1 and 2, a pressure control mechanism 100 of a suction device according to an embodiment of the present invention includes a body 1 and a piston body 2.

The body 1 has a wall portion 11 and a base 12. The wall portion 11 is annular, and is provided with two sleeves 13. The inner wall surface 111 of the wall portion 11 defines an accommodating space S, and the accommodating space S communicates with the two sleeves 13. The two sleeves 13 each have an oblique communication port 131, 132. Specifically, the two oblique communication ports 131, 132 are inclined with respect to the central axis of the sleeve 13.

The piston body 2 is movably disposed in the accommodating space S, and the piston body 2 has an oblique side surface 21. Specifically, the oblique side surface 21 of the piston body 2 is an annular oblique side surface, and is inclined from top to bottom with respect to a central axis of the piston body 2, and corresponds to the two oblique directions. The communication ports 131 and 132 have the same inclination angle as the two oblique communication ports 131 and 132. Of course, this creation is not limited to this. Alternatively, the piston body can have two oblique side surfaces, and the two sleeves can have two oblique communication ports corresponding to the two oblique side surfaces.

When the piston body 2 is in a first position, the oblique side surfaces 21 of the piston body 2 respectively engage the two oblique communication ports 131, 132 of the two sleeves 13, so that the two sleeves 13 is closed by the piston body 2 and not electrically connected to the accommodating space S (as shown in FIG. 1 ), and thus connected to a negative pressure device (not shown) of the two sleeves 13 and a suction duct 202 ( As shown in Figure 3), they do not conduct each other to stop the negative pressure. When the piston body 2 is in a second position, the oblique side surface 21 of the piston body 2 is separated from the two oblique communication ports 131, 132 of the two sleeves 13 without the two oblique directions The communication ports 131 and 132 are attached to each other, so that the two sleeves 13 are electrically connected to the accommodating space S (as shown in FIG. 2 ), and thus the negative pressure device and the suction conduit 202 respectively connected to the two sleeves 13 . (As in Figure 3) the phase is turned on and a negative pressure is supplied to the suction conduit 202 for suction operation. Of course, this creation is not limited to this. Alternatively, the piston body may have an oblique side surface, and one of the sleeves has an oblique communication port corresponding to the oblique side surface.

As shown in FIG. 1 and FIG. 2 , the pressure control mechanism 100 according to the embodiment of the present invention further includes a pushing member 3 disposed in the accommodating space S and connected to the piston body 2 and the body. Between the bases 12, the piston body 2 is moved by the pushing member 3 to move to a first position D1 to the first position, and the oblique side surface 21 is fitted to close the two. The oblique communication ports 131, 132 (as shown in Fig. 1). For example, the pushing member 3 is a spring. Of course, this creation is not limited to this. The pushing member may also be other than the piston body 2 that can be pushed in a first direction D1.

As shown in FIG. 1 and FIG. 2, the pressure control mechanism 100 according to the embodiment of the present invention further includes a pressing member 4 disposed on a top portion 22 of the piston body 2 through which the piston body 2 is pressed. The pressing of the member 4 moves to a second position in the second direction D2, and the oblique side surface 21 is separated from the two oblique communication ports 131, 132 to make the two sleeves 13 and the accommodating space The S phase is turned on (as shown in Figure 2). In detail, the piston body 2 further has a constricted annular surface 23 between the oblique side surface 21 of the piston body and the top portion 22, and the oblique side surface 21 is separated from the two obliquely communicating sides. In the mouths 131 and 132, the constricted annular surface 23 is located between the two oblique communication ports 131 and 132 to electrically connect the two sleeves 13 to the accommodating space S.

As shown in FIG. 3, the pressure control mechanism 100 according to the embodiment of the present invention can be applied to a closed twitch device 200 (which can also be an open twitch device or a other suction device). In use, the gas-cut communication tube 201 is connected to the respiratory tract of the patient, and the pressure control mechanism 100 is coupled between a vacuum device (not shown) and the suction catheter 202. When the pressing member 4 is not pressed, the piston body 2 closes the two sleeves 13 with the two oblique side surfaces 21 to make the negative pressure device and the suction conduit 202 non-conductive. When the twitch is to be started, the pressing member 4 is pressed to separate the two oblique side surfaces 21 of the piston body 2 from the two sleeves 13 so that the negative pressure device and the suction duct 202 are in an on state.

As shown in Fig. 3, according to the pressure control mechanism 100 of the embodiment of the present invention, the two sleeves 13 are located at the same level H. Thereby, when the piston body 2 is moved to the first position, the oblique side surface 21 will be simultaneously fitted to close the two oblique communication ports 131, 132 (as shown in FIG. 1), and when the piston When the body 2 is moved to the second position, the oblique side surface 21 is simultaneously separated from the two oblique communication ports 131, 132 to connect the two sleeves 13 with the accommodating space S (eg, 2)

As shown in FIGS. 1 and 2, according to the pressure control mechanism 100 of the embodiment of the present invention, the oblique side surface 21 is an arc-shaped oblique side surface, and The two oblique communication ports 131, 132 are respectively an arc-shaped oblique communication port corresponding to the curved oblique side surface.

As shown in FIG. 2, in accordance with the pressure control mechanism 100 of the presently-created embodiment, the piston body 2 further includes a stop member 24 disposed on the top portion 22 of the piston body 2. In detail, the stop member 24 is made of an elastic material. The stagnation member 24 is attached to the inner wall surface 111 of the body 1 to prevent gas from escaping from the gap between the body 1 and the pressing member 4 when the piston body 2 moves.

The above description is only for the preferred embodiment of the present invention, and those skilled in the art can make other improvements according to the above description, but these changes still belong to the creative spirit of the creation and the patents defined below. In the scope.

100‧‧‧pressure control mechanism

1‧‧‧ Ontology

11‧‧‧ wall

111‧‧‧ inner wall

12‧‧‧Base

13‧‧‧ casing

131, 132‧‧‧ oblique communication port

2‧‧‧ piston body

21‧‧‧ oblique side surface

22‧‧‧ top

23‧‧‧Necked torus

24‧‧‧Stops

3‧‧‧Pushing components

4‧‧‧ Pressing members

D1‧‧‧ first direction

H‧‧‧level height

S‧‧‧ accommodating space

Claims (10)

The pressure control mechanism of the suction device comprises a body and a piston body, the body has an accommodating space, the accommodating space is connected to the two sleeves, and the piston body is movably disposed in the accommodating space, wherein the accommodating space At least one sleeve has an oblique communication port, the piston body having an oblique side surface, the inclined body surface of the piston body at a first position abutting and closing the oblique communication port, or the piston body The oblique side surface is separated from the oblique communication port in a second position to electrically connect the two sleeves to the accommodating space. The pressure control mechanism of claim 1, wherein the oblique side surface is an annular oblique side surface. The pressure control mechanism of claim 1, wherein the two sleeves have two oblique communication ports, and the piston system has two oblique side surfaces. The pressure control mechanism of claim 3, wherein the two oblique communication ports are at the same level. The pressure control mechanism according to claim 1, wherein the oblique side surface is an arc-shaped oblique side surface, and the oblique communication port is an arc-shaped oblique communication port, and the curved oblique direction The side surfaces correspond. The pressure control mechanism of claim 1, further comprising a pushing member disposed in the accommodating space and connected between the piston body and a base of the body, so that the piston body is subjected to the pushing member Pushing and moving normally, the oblique side surfaces are fitted to close the two oblique communication ports. The pressure control mechanism of claim 1, wherein the pressure control mechanism is a pressure control mechanism of a pumping device. The pressure control mechanism of claim 1, further comprising a pressing member disposed on a top of the piston body, the piston system being pressed by the pressing member to separate the oblique side surface from the two oblique communication The two sleeves are electrically connected to the accommodating space. The pressure control mechanism of claim 1, wherein the piston body further has a contraction a neck ring surface located between the top of the piston body and the oblique side surface. When the oblique side surface is separated from the two oblique communication ports, the neck ring surface is located in the two oblique directions The two sleeves are electrically connected to the accommodating space between the ports. The pressure control mechanism of claim 1, wherein the piston body further comprises a stop member disposed on top of one of the piston bodies and having a stagnation ring surface attached to an inner wall surface of the body.