TWM477890U - 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 when the suction pipe is sucked by a negative pressure mechanism, and a pressure control mechanism is provided between the negative pressure mechanism and the suction pipe 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 conduction or closing of the negative pressure mechanism and the suction conduit through the movement of a piston body in the chamber to control the gas negative Press and press to perform the pumping operation.

As shown in Figures 6 and 7, the conventional pressure control mechanism 100' typically utilizes a stop member 22' to prevent gas negative pressure loss. However, when the conventional pressure control mechanism 100' moves in the axial direction of the piston body, the flexible stop member 22' is deformed, causing gas leakage to hinder the execution of the suction operation.

Therefore, the purpose of the present invention is to provide a pressure control mechanism to avoid the problem of deformation of the flexible stop member, 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 having an opening, the piston system axially sliding in the accommodating space, the two sleeves being electrically connected or closed to the accommodating space, wherein the piston body and the opening are provided with a slant a pneumatic stop member protruding from a radial surface of the piston body, The flexible leakage member has a convex arc-shaped abutting surface that is radially attached to an inner wall surface of the body in the accommodating space.

In an embodiment of the present invention, a pressure control mechanism for a suction device is provided. The pressure control mechanism includes a plurality of flexible stop members that are convexly disposed at different axial positions of the radial surface.

In an embodiment of the present invention, a pressure control mechanism for a suction device is provided. The flexible leakage member is a flexible stagnation ring that is sleeved on the piston body.

In an embodiment of the present invention, a pressure control mechanism for a suction device is provided, the radial relief height of the flexible leakage member being less than the axial thickness of the flexible leakage member.

In an embodiment of the present invention, a pressure control mechanism for a suction device is provided, the center of curvature of the convex curved engagement surface being located within the piston body.

In an embodiment of the present invention, a pressure control mechanism for a suction device is provided, the center of curvature of the convex curved contact surface being located on the radial surface.

In an embodiment of the present invention, a pressure control mechanism for a suction device is provided. The piston body has a recessed groove on the radial surface, and the flexible stop member is embedded in the recessed groove.

According to the technical means adopted in the present invention, the flexible stop member is radially attached to the inner wall surface of the body by the convex curved contact surface, and does not generate when the piston body slides axially. The deformation can be ensured to maintain a good airtightness, whereby 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.

[this creation]

100, 100a‧‧‧ pressure control mechanism

1‧‧‧ Ontology

11‧‧‧ wall

111‧‧‧ inner wall

112‧‧‧ openings

12‧‧‧Base

13‧‧‧ casing

131, 132‧‧‧Connected

2‧‧‧ piston body

21‧‧‧ Radial surface

22, 22a‧‧‧Flexible stoppers

221, 221a‧‧‧ convex curved surface

23‧‧‧Necked torus

24‧‧‧Inlay

3‧‧‧Pushing components

4‧‧‧ Pressing members

200‧‧‧Drawing device

201‧‧‧ gas-cut connecting tube

202‧‧‧Attraction catheter

D1‧‧‧ first direction

D2‧‧‧ second direction

H, Ha‧‧‧ Height

S‧‧‧ accommodating space

T, Ta‧‧‧ axial thickness

[study]

100’‧‧‧ Pressure Control Agency

1‧‧‧ Ontology

11‧‧‧ wall

111‧‧‧ inner wall

12‧‧‧Base

13‧‧‧ casing

131, 132‧‧‧Connected

2‧‧‧ piston body

21‧‧‧ Radial surface

22’‧‧‧Flexible Stopper

23‧‧‧Necked torus

3‧‧‧Pushing components

4‧‧‧ Pressing members

D1‧‧‧ first direction

D2‧‧‧ second direction

1 is a schematic view showing a pressure control mechanism of a suction device according to an embodiment of the present invention in a closed state; and FIG. 2 is a view showing a pressure control mechanism of the suction device according to an embodiment of the present invention. FIG. 3 is a schematic view showing the use of the pressure control mechanism of the suction device according to the embodiment of the present invention; and FIG. 4 is a view showing the pressure control mechanism of the suction device according to the embodiment of the present invention. A cross-sectional view of a piston body; Fig. 5 is a schematic view showing a pressure control mechanism of a suction device according to another embodiment of the present invention; and Fig. 6 is a schematic view showing a pressure control mechanism of a conventional suction device in a closed state Figure 7 is a schematic view showing the pressure control mechanism of the conventional suction device in an on state.

Embodiments of the present creation will be described below based on Figs. 1 to 5 . 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 has a hollow column shape and is provided with two sleeves 13. An inner wall surface 111 of the wall portion 11 encloses an accommodation space S. The accommodating space S has an opening 112, and the accommodating space S communicates with the two sleeves 13 through the two communication ports 131 and 132 respectively provided by the two sleeves 13. The base 12 is coupled to one end of the wall portion 11.

The piston body 2 axially slides in the accommodating space S to close or open the communication ports 131 and 132, so that the two sleeves 13 are closed or electrically connected 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). When in use, the gas cut communication tube 201 is connected To the respiratory tract of the patient, the pressure control mechanism 100 is coupled between a negative pressure 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 radial surface 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 radial surface 21 of the piston body 2 from the two sleeves 13 so that the negative pressure device and the suction conduit 202 are in a conducting state.

Specifically, when the piston body 2 is in a first position (FIG. 1), the radial surface 21 of the piston body 2 respectively engages the two communication ports 131, 132 of the two sleeves 13, so that the two The sleeves 13 are closed by the piston body 2 and are not electrically connected to the accommodating space S (as shown in FIG. 1 ), and thus are connected to a negative pressure device and a suction conduit 202 of the two sleeves 13 respectively (eg, the third Figure) is not conductive to stop negative pressure. When the piston body 2 is in a second position (Fig. 2), the radial surface 21 of the piston body 2 is separated from the two communication ports 131, 132 of the two sleeves 13 without 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 shown in Fig. 3) the phase is turned on, and a negative pressure is supplied to the suction duct 202 for the pumping operation.

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 1 . 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 radial surface 21 is fitted to close the two communicating ports. 131, 132 (as shown in Figure 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 FIGS. 1 and 2, the pressing member 4 is provided on the top of the piston body 2, and the piston body 2 is moved to a second position in a second direction D2 by the pressing of the pressing member 4. The radial surface 21 is separated from the two communication ports 131, 132 and the two sleeves 13 are electrically connected to the accommodating space S (such as the second Figure). In detail, a constricted annular surface 23 of the piston body 2 is located between the radial surface 21 of the piston body and the flexible stop member 22, and the radial surface 21 is separated from the two communication ports. At 131 and 132, the conical ring surface 23 is located between the two communication ports 131 and 132. Since the neck ring surface 23 has a small diameter and is retracted, the two communication ports 131 and 132 are not The two sleeves 13 are electrically connected to the accommodating space S.

As shown in FIGS. 1 and 2, in the present creation, a flexible stop member 22 is disposed between the piston body 2 and the opening 112. Specifically, the flexible stop member 22 is made of a flexible material such as rubber, silicone or the like. The flexible stop member 22 is convexly disposed on the radial surface 21 of the piston body 2. The flexible stop member 22 has a convex arc-shaped abutting surface 221 which is radially attached to the inner wall surface 111 of the body 1 . When the piston body 2 is moved, the flexible stop member 22 can prevent gas from overflowing from the opening 112 to the gap between the body 1 and the pressing member 4.

The flexible stop member 22 is a flexible stagnation ring that is sleeved on the piston body 2. Of course, this creation is not limited to this. The flexible stop member may also be a disc-shaped stop member disposed between the piston body 2 and the pressing member 4.

The radial protrusion height H of the flexible stop member 22 is smaller than the axial thickness T of the flexible stop member 22 to avoid the radial length being too long, and the axial force is easily generated when the piston body 2 moves. Deformation, causing gas leakage.

As shown in FIG. 4, the piston body 2 has a recess 24 on the radial surface, and the flexible stop 22 is embedded in the recess 24 to move the flexible stop 22 to the piston 2. Stabilize without falling off. Of course, this creation is not limited to this. The flexible stop member may also be a disc-shaped flexible stop member disposed between the piston body 2 and the opening 112.

As shown in Figs. 1 and 2, the center of curvature of the convex curved contact surface 221 is located on the radial surface. Of course, this creation is not limited to this. As shown in FIG. 5, according to another embodiment of the present invention, the pressure control mechanism 100a, the center of curvature of a convex curved contact surface 221a of a flexible stop member 22a is located at the center of curvature. In the plug body 2, the flexible hemorrhage member 22a is convex, and the conventional flexible hemorrhage member 22' is prevented from being deformed by the concave shape 22' (e.g., Fig. 6 and Figure 7)).

As shown in FIG. 5, according to the pressure control mechanism 100a of the embodiment of the present invention, the pressure control mechanism 100a includes a plurality of flexible stop members 22a at different axial positions of the radial surface 21, The airtight effect of the pressure control mechanism 100a is enhanced to enhance the airtight effect by the more flexible leakage member 22a.

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

112‧‧‧ openings

12‧‧‧Base

13‧‧‧ casing

131, 132‧‧‧Connected

2‧‧‧ piston body

21‧‧‧ Radial surface

22‧‧‧Flexible stop

221‧‧‧Outer convex curved surface

23‧‧‧Necked torus

3‧‧‧Pushing components

4‧‧‧ Pressing members

D1‧‧‧ first direction

H‧‧‧ Height

S‧‧‧ accommodating space

T‧‧‧ axial thickness

Claims (8)

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 has an opening, the piston system is axially slid The accommodating space is such that the two sleeves are electrically connected or closed to the accommodating space, wherein a flexible stagnation member is disposed between the piston body and the opening, and the flexible stagnation member is convexly disposed. On the radial surface of the piston body, the flexible leakage member has a convex curved contact surface, and the convex curved contact surface is radially attached to the body in the receiving space. Wall. The pressure control mechanism of claim 1, wherein the pressure control mechanism comprises a plurality of flexible stop members, the protrusions being disposed at different axial positions of the radial surface. The pressure control mechanism of claim 1, wherein the flexible stop member is a flexible stagnation ring that is sleeved on the piston body. The pressure control mechanism of claim 1, wherein the flexible stagnation member has a radial protrusion height that is less than an axial thickness of the flexible stagnation member. The pressure control mechanism of claim 1, wherein a center of curvature of the convex curved contact surface is located in the piston body. The pressure control mechanism of claim 1, wherein a center of curvature of the convex curved contact surface is located on the radial surface. The pressure control mechanism of claim 1, wherein the piston body has a recess on the radial surface, and the flexible stop member is embedded in the recess. The pressure control mechanism of claim 1, wherein the pressure control mechanism is a pressure control mechanism of a pumping device.