CN109876217B - Waterproof structure for outlet of ventricular assist device - Google Patents

Abstract

The present invention discloses a waterproof structure for a ventricular assist device outlet, comprising a shell, a conductive intermediate connector, an inner cover, an outer cover, a cable and a circuit board; the shell is provided with a water baffle, and a mounting hole is provided on the water baffle; the conductive intermediate connector passes through the mounting hole, and the conductive intermediate connector and the mounting hole are sealed and connected; the inner cover is arranged outside the shell, and a threading hole is provided on the inner cover, and the water baffle is arranged within the range surrounded by the inner cover; the outer cover is sealed and connected to the inner cover, and the outer cover, the inner cover and the water baffle form a sealed cavity; a part of the cable passes through the threading hole and is arranged in the sealed cavity, a sealing sleeve is sleeved on the portion of the cable arranged in the threading hole, and the portion of the cable arranged in the sealed cavity is electrically connected to the conductive intermediate connector; the circuit board is arranged inside the shell, and the circuit board is electrically connected to one end of the conductive intermediate connector arranged inside the shell; this scheme achieves double waterproofing through the sealing sleeve and the water baffle, thereby solving the problem of poor waterproofing performance in the prior art.

Description

Waterproof structure of ventricular assist device outlet

Technical Field

The invention relates to a waterproof structure, in particular to a waterproof structure for a ventricular assist device outlet.

Background Art

A ventricular assist device is a mechanical cardiac assist device that provides circulation support when the ventricles cannot meet the systemic perfusion needs. It maintains and increases systemic and pulmonary circulation, ensures and improves tissue perfusion, reduces myocardial oxygen consumption, increases myocardial oxygen supply, and allows the failing heart to recover its function or temporarily replace heart function while waiting for a heart transplant. It is also a powerful rescue measure for severe heart failure.

However, in the prior art, the cable interface is sealed only with a sealing sleeve. As the use time increases, blood can easily penetrate into the interior of the ventricular assist device, causing the ventricular assist device to malfunction or even be damaged, posing a serious safety hazard to patients.

Summary of the invention

The object of the present invention is to provide a waterproof structure for a ventricular assist device outlet to solve the problem of poor waterproof performance of the existing ventricular assist device.

In order to solve the above technical problems, the present invention provides a waterproof structure for a ventricular assist device outlet, comprising: a shell, a water baffle is provided on the shell, a mounting hole is provided on the water baffle, and the mounting hole passes through two opposite surfaces of the water baffle; a conductive intermediate connector, the conductive intermediate connector passes through the mounting hole, the conductive intermediate connector and the mounting hole are sealed and connected, and two ends of the conductive intermediate connector are respectively placed inside and outside the shell; an inner cover, the inner cover is arranged outside the shell, the inner cover is provided with a threading hole, and the water baffle is placed within the range surrounded by the inner cover; an outer cover, the outer cover is sealed and connected to the inner cover, and the outer cover, the inner cover and the water baffle form a sealed cavity; a cable, a part of the cable passes through the threading hole and is placed in the sealed cavity, a sealing sleeve is sleeved on the portion of the cable placed in the threading hole, and the portion of the cable placed in the sealed cavity is electrically connected to the conductive intermediate connector; and a circuit board, the circuit board is placed inside the shell, and the circuit board is electrically connected to one end of the conductive intermediate connector placed inside the shell.

Wherein, the conductive intermediate connector is a conductor pin.

Wherein, an insulating rubber pad is sleeved on the conductor pin, and the insulating rubber pad is placed between the conductor pin and the mounting hole.

Wherein, glue is filled between the insulating rubber pad and the mounting hole.

The outer shape of the sealing sleeve is conical, the shape of the threading hole matches the outer shape of the sealing sleeve, and the sealing sleeve abuts against the inner wall of the threading hole.

Wherein, glue is filled between the sealing sleeve and the threading hole.

Wherein, a glue coating hole is provided on the hole wall of the threading hole, and the glue coating hole passes through the hole wall of the threading hole.

Wherein, the cable is also covered with a clamping ring, and the clamping ring is clamped between the sealing sleeve and the outer cover.

Wherein, the water baffle is fixed to the shell by welding, the inner cover is fixed to the shell by welding, and the outer cover is fixed to the inner cover by welding.

The feature of the invention is that the surface of the water baffle is covered with glue, and the glue covers the connection between the water baffle and the conductive intermediate connector.

The beneficial effects of the present invention are as follows:

Firstly, since the portion of the cable placed in the threading hole is covered with a sealing sleeve, a first waterproof barrier is constructed between the threading hole and the cable to prevent moisture from entering the sealed cavity through the threading hole; secondly, since the conductive intermediate connector and the mounting hole are sealed, the portion of the cable placed in the sealed cavity is electrically connected to the conductive intermediate connector, and the circuit board is electrically connected to one end of the conductive intermediate connector placed inside the shell, that is, the cable can be electrically connected to the circuit board through the conductive intermediate connector, so even if moisture enters the sealed cavity, the moisture will still be blocked by the water baffle, thereby achieving the dual waterproof function of the ventricular assist device.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the technical solution of the present invention, the drawings required for use in the implementation mode will be briefly introduced below. Obviously, the drawings described below are only some implementation modes of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

FIG1 is a schematic diagram of a disassembled structure provided by a preferred embodiment of a waterproof structure for a ventricular assist device outlet of the present invention;

FIG2 is a schematic diagram of the structure of the guidewire pin before assembly provided by a preferred embodiment of the waterproof structure of the wire outlet of the ventricular assist device of the present invention;

FIG3 is a schematic diagram of the structure of the wire guide pin after assembly provided by the preferred embodiment of the waterproof structure of the wire outlet of the ventricular assist device of the present invention;

FIG4 is an enlarged structural schematic diagram of part A of FIG1 ;

5 is a schematic diagram of the structure after the water retaining plate and the housing are assembled, provided in a preferred embodiment of the waterproof structure of the outlet of the ventricular assist device of the present invention;

6 is a schematic diagram of a connection structure between a circuit board and a wire pin provided by a preferred embodiment of a waterproof structure for a ventricular assist device outlet of the present invention;

7 is a schematic structural diagram of an inner cover assembly state provided by a preferred embodiment of the waterproof structure of the ventricular assist device outlet of the present invention;

FIG8 is a schematic diagram of a cable and wire pin connection structure provided by a preferred embodiment of a waterproof structure for a ventricular assist device outlet of the present invention;

9 is a cross-sectional schematic diagram of the assembly state of the cable, the sealing sleeve and the clamp ring provided in the preferred embodiment of the waterproof structure of the outlet of the ventricular assist device of the present invention;

FIG. 10 is a schematic structural diagram of a preferred embodiment of a waterproof structure for a ventricular assist device outlet according to the present invention.

The reference numerals are as follows:

1. Shell; 11. Flange; 2. Water baffle; 21. Mounting hole; 22. Boss; 3. Conductive intermediate connector; 4. Inner cover; 41. Threading hole; 42. Glue hole; 5. Outer cover; 6. Cable; 7. Sealing sleeve; 8. Circuit board; 9. Insulating rubber pad; 10. Snap ring.

DETAILED DESCRIPTION

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

As can be seen from Figures 1, 2 and 7, the waterproof structure of the outlet of the ventricular assist device described in the embodiment of the present invention includes a shell 1, a water baffle 2 is provided on the shell 1, and a mounting hole 21 is provided on the water baffle 2, and the mounting hole 21 passes through the two opposite surfaces of the water baffle 2; a conductive intermediate connector 3, the conductive intermediate connector 3 passes through the mounting hole 21, the conductive intermediate connector 3 is sealed and connected to the mounting hole 21, and the two ends of the conductive intermediate connector 3 are respectively placed inside and outside the shell 1; an inner cover 4, the inner cover 4 is arranged outside the shell 1, and a threading hole 41 is provided on the inner cover 4, and the water baffle 2 passes through the mounting hole 21, and the conductive intermediate connector 3 passes through the mounting hole 21, and the conductive intermediate connector 3 passes through the mounting hole 21, and the conductive intermediate connector 3 passes through the mounting hole 21, and the conductive intermediate connector 3 passes through the mounting hole 21, and the conductive intermediate connector 3 passes through the mounting hole 21, and the conductive intermediate connector 3 passes through the mounting hole 21, and the two ends of the conductive intermediate connector 3 are respectively placed inside and outside the shell 1; an inner cover 4, the inner cover 4 is arranged outside the shell 1, and the inner cover 4 is provided with a threading hole 41, and the water baffle 2 passes through the mounting hole 21, and the conductive intermediate connector 3 ... The water plate 2 is placed within the range surrounded by the inner cover 4; the outer cover 5, the outer cover 5 is sealed and connected to the inner cover 4, and the outer cover 5, the inner cover 4 and the water baffle 2 form a sealed cavity; the cable 6, a part of the cable 6 passes through the threading hole 41 and is placed in the sealed cavity, the portion of the cable 6 placed in the threading hole 41 is covered with a sealing sleeve 7, and the portion of the cable 6 placed in the sealed cavity is electrically connected to the conductive intermediate connector 3; and the circuit board 8, the circuit board 8 is placed inside the shell 1, and the circuit board 8 is electrically connected to one end of the conductive intermediate connector 3 placed inside the shell 1.

The above method realizes double waterproof treatment. Firstly, since the portion of the cable 6 placed in the threading hole 41 is covered with the sealing sleeve 7, a first waterproof barrier is constructed between the threading hole 41 and the cable 6 to prevent moisture from entering the sealed cavity through the threading hole 41; secondly, since the mounting hole 21 of the water baffle 2 is sealed and connected with the conductive intermediate connector 3, the cable 6 can be electrically connected to the circuit board 8 through the conductive intermediate connector 3, so even if moisture enters the sealed cavity, the moisture will still be blocked by the water baffle 2, thereby realizing the double waterproof function of the ventricular assist device.

Preferably, in order to enhance the sealing performance between the conductive intermediate connector 3 and the mounting hole 21, the conductive intermediate connector 3 should be made of a material that is not easily deformed, so as to avoid the conductive intermediate connector 3 affecting the sealing connection effect due to deformation and shrinkage during future applications. As shown in FIG. 1 , a preferred embodiment may be that the conductive intermediate connector 3 is a wire pin.

At this time, the conductive intermediate connector 3 is a wire pin, which is a rigid conductive device made of conductive metal with a small deformation. It can not only prevent the wire pin from deforming in the future and affecting the sealing connection effect, but also when the wire pin passes through the mounting hole 21 for assembly, since the wire pin will not be completely deformed, the installation convenience of the wire pin is also much better than that of a flexible wire, thereby greatly improving the installation production efficiency.

In addition, as can be seen from FIG. 1 , there are seven conductor pins so as to electrically connect to the lines in the cable 6 , that is, there is no special restriction on the number of conductor pins, and it is only necessary to ensure that they are connected and conducted to the necessary connection lines in the cable 6 .

Preferably, in order to further enhance the sealing connection effect between the wire needle and the mounting hole 21, it should be ensured that the gap between the two is in a fully filled state. As shown in Figure 2, a preferred implementation method may be that the wire needle is covered with an insulating rubber pad 9, and the insulating rubber pad 9 is placed between the wire needle and the mounting hole 21.

The insulating rubber pad 9 is roughly annular in shape so that the insulating rubber pad 9 can be put on the outside of the wire pin. Since the insulating rubber pad 9 has sufficient elasticity, the insulating rubber pad 9 can not only tightly cover the wire pin, but also maintain a tight elastic abutment state with the mounting hole 21 at all times to prevent moisture from passing through the gap between the two; wherein, the insulating rubber pad 9 is made of a colloid material with excellent elasticity, and silicone has many advantages such as corrosion resistance, aging resistance, and good elasticity, so it is preferred to use silicone to make the insulating rubber pad 9.

Preferably, in order to further enhance the sealing connection effect between the wire pin and the mounting hole 21, the gap between the insulating rubber pad 9 and the mounting hole 21 may be sealed again. A preferred implementation may be that the gap between the insulating rubber pad 9 and the mounting hole 21 is filled with glue.

Although the addition of the insulating rubber pad 9 can enhance the water tightness between the conductor pin and the mounting hole 21, there is still a gap between the insulating rubber pad 9 and the mounting hole 21, but it is basically difficult for moisture to pass through. After filling the gap between the two with glue, the insulating rubber pad 9 and the mounting hole 21 are almost connected as a whole, thereby further enhancing the water tightness; similarly, glue can also be filled between the insulating rubber pad 9 and the conductor pin to further enhance the water tightness between the two.

Preferably, in order to ensure good water tightness between the cable 6 and the threading hole 41, the sealing sleeve 7 should be able to fit tightly with the cable 6 and the threading hole 41. As shown in Figure 9, a preferred implementation method may be that the sealing sleeve 7 has a conical shape, the shape of the threading hole 41 matches the shape of the sealing sleeve 7, and the sealing sleeve 7 abuts against the inner wall of the threading hole 41.

9 as an example, at this time, the outer shape of the sealing sleeve 7 and the inner cavity of the threading hole 41 are both conical. Since the outer shapes of the two match, when the sealing sleeve 7 is placed alone in the threading hole 41, the sealing sleeve 7 can be easily and unobstructedly inserted into the threading hole 41; but since the sealing sleeve 7 is also sleeved on the outside of the cable 6, the sealing sleeve 7 will expand outward, so when the sealing sleeve 7 is simply inserted into the threading hole 41, only the narrow end of the sealing sleeve 7 can be inserted into the threading hole 41, and a part of the wide end of the sealing sleeve 7 will be placed outside the threading hole 41; if the sealing sleeve 7 is in the shape of a cylinder or the like, it is basically difficult to push the sealing sleeve 7 completely into the threading hole 41 at this time, and the advantage of the conical sealing sleeve 7 is that at this time, only further force is needed to push the sealing sleeve 7 completely into the threading hole 41, and the sealing sleeve 7 can also be tightly clamped between the threading hole 41 and the cable 6 to ensure good water tightness between the threading hole 41 and the cable 6.

Preferably, in order to further enhance the sealing connection effect between the sealing sleeve 7 and the threading hole 41, the gap between the sealing sleeve 7 and the threading hole 41 may be sealed again. A preferred implementation may be that the gap between the sealing sleeve 7 and the threading hole 41 is filled with glue.

Although the sealing sleeve 7 and the threading hole 41 are in close contact and moisture is basically difficult to pass through, there is still a gap between the two. After filling the gap with glue, the sealing sleeve 7 and the threading hole 41 are almost connected as a whole, thereby further enhancing the watertightness; similarly, glue can also be filled between the sealing sleeve 7 and the cable 6 to further enhance the watertightness between the two.

Preferably, in order to facilitate the filling of glue between the sealing sleeve 7 and the threading hole 41, a related structure can be set on the threading hole 41. As shown in Figure 7, a preferred implementation method can be that a glue coating hole 42 is provided on the hole wall of the threading hole 41, and the glue coating hole 42 passes through the hole wall of the threading hole 41.

After the cable 6 and the sealing sleeve 7 have been inserted into the threading hole 41, it is only necessary to inject glue into the inside of the threading hole 41 through the glue application hole 42, and the glue will naturally fill the space between the sealing sleeve 7 and the threading hole 41, that is, there is no need to pre-apply glue to the inner wall of the threading hole 41 or the outer wall of the sealing sleeve 7. The glue injection operation is not only simpler than the glue application operation, but also can ensure the comprehensiveness of the glue coverage, and also avoid the phenomenon of glue solidification when the sealing sleeve 7 is inserted into the threading hole 41, thereby providing an important guarantee for the watertightness between the sealing sleeve 7 and the threading hole 41.

Preferably, in order to ensure good water tightness between the cable 6 and the threading hole 41, the sealing sleeve 7 should be firmly installed to avoid the situation where the water tightness is affected by the loosening of the sealing sleeve 7. As shown in Figures 9 and 10, a preferred embodiment may be that the cable 6 is also provided with a clamping ring 10, and the clamping ring 10 is clamped between the sealing sleeve 7 and the outer cover 5.

At this time, since the snap ring 10 is held between the sealing sleeve 7 and the outer cover 5, the snap ring 10 can prevent the sealing sleeve 7 from escaping from the threading hole 41, and the outer cover 5 actually realizes a sealed connection between the sealing sleeve 7 and the outer cover 5 by pressing the snap ring 10 toward the sealing sleeve 7.

Preferably, in order to ensure the water tightness of the waterproof structure of the ventricular assist device outlet, the water tightness of the connection parts between the various components should be ensured. A preferred implementation method may be that the water baffle 2 is welded and fixed to the shell 1, the inner cover 4 is welded and fixed to the shell 1, and the outer cover 5 is welded and fixed to the inner cover 4.

By welding, the water baffle 2 and the shell 1 can be connected as one, the inner cover 4 and the shell 1 can be connected as one, and the outer cover 5 and the inner cover 4 can be connected as one, so as to avoid gaps at the connection points of the components, thereby completely preventing moisture from penetrating through the connection points of the components.

Preferably, the water baffle 2 is equivalent to the last line of defense of the waterproof structure of the ventricular assist device outlet. Therefore, in order to improve the waterproof performance of the water baffle 2, a preferred implementation method may be that the surface of the water baffle 2 is covered with glue, and the glue covers the connection between the water baffle 2 and the conductive intermediate connector 3.

Therefore, the glue will cover the mounting holes of the water baffle 2 and the various connecting gaps between the conductive intermediate connector 3, thereby preventing moisture from entering the interior of the shell 1 through the gaps between the mounting holes and the conductive intermediate connector 3, further improving the waterproof performance of the waterproof structure of the ventricular assist device outlet.

In summary of the above-mentioned improvements, the assembly process of the waterproof structure of the ventricular assist device outlet according to the embodiment of the present invention is roughly as follows:

1. As shown in FIG. 2 and FIG. 3, the conductive intermediate connector 3 is a conductor pin, which is cylindrical. First, the insulating rubber pad 9 is sleeved on the outside of the conductor pin, and glue is applied on the outer surface of the insulating rubber pad 6 and the hole wall of the mounting hole 21. Then, the conductor pin is inserted into the mounting hole 21 until the insulating rubber pad 9 is flattened;

2. As shown in FIGS. 1 , 4 and 5 , the housing 1 is roughly annular, and a portion of the side wall of the housing 1 is a hollow structure. The outer wall of the housing 1 is provided with a circle of flanges 11 around the hollow structure, and a boss 22 is provided in the middle of the surface of the water retaining plate 2 facing the hollow structure, and the boss 22 is embedded in the space surrounded by the flange 11 so that the surface of the water retaining plate 2 facing the hollow structure abuts against the flange 11, and then the abutment between the water retaining plate 2 and the flange 11 is welded and sealed;

3. As shown in FIG. 6 , the circuit board 8 is connected to the end of the conductor pin placed inside the housing 1 by welding;

4. As shown in FIG. 7 , the inner cover 4 is roughly a hollow frame-shaped structure, and the threading hole 41 is placed on the right side of the inner cover 4 . The axial direction of the threading hole 41 is roughly the same as the length direction of the inner cover 4 . At this time, the inner cover 4 is surrounded outside the water baffle 2 and the inner cover 4 is welded and fixed to the housing 1 .

5. As shown in FIG8 and FIG9 , pass the cable 6 through the threading hole 41, then install the sealing sleeve 7 and the clamping ring 10 on the cable 6, and insert the sealing sleeve 7 into the threading hole;

6. As shown in FIG. 2 and FIG. 8 , the relevant lines of the cable 6 are correspondingly welded to the conductor pins, and then glue is applied to the surface of the water baffle plate so that the glue covers the mounting hole 21, the abutting part of the conductor pins and the insulating rubber pad, and strengthens the connection between the cable 6 and the conductor pins;

7. As shown in FIG. 10 , the outer cover 5 and the inner cover 4 are correspondingly fitted and abutted. At this time, the edge portions of the outer cover 5 and the inner cover 4 are in a corresponding matching state. Then, the abutting portions of the outer cover 5 and the inner cover 4 are welded to connect and fix the two.

8. As shown in FIG. 7 and FIG. 10 , glue is poured into the threading hole 41 through the glue coating hole 42 to complete the assembly of the waterproof structure of the wire outlet of the entire ventricular assist device.

The above is a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several improvements and modifications without departing from the principle of the present invention. These improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims (8)

1. A waterproof structure of a wire outlet of a ventricular assist device is characterized by comprising,

The shell is provided with a water baffle, the water baffle is provided with mounting holes, and the mounting holes penetrate through two opposite surfaces of the water baffle;

The conductive middle connector passes through the mounting hole, the conductive middle connector is in sealing connection with the mounting hole, two ends of the conductive middle connector are respectively arranged inside and outside the shell, and the conductive middle connector is a wire needle;

the inner cover is arranged outside the shell, a threading hole is formed in the inner cover, and the water baffle is arranged in a range surrounded by the inner cover;

the outer cover is in sealing connection with the inner cover, and a sealing cavity is formed by the outer cover, the inner cover and the water baffle;

The cable is arranged in the sealing cavity through the threading hole, a sealing sleeve is sleeved at the part of the cable arranged in the threading hole, the part of the cable arranged in the sealing cavity is electrically connected with the conductive middle connector, the sealing sleeve is conical in shape, the shape of the threading hole is matched with the shape of the sealing sleeve, and the sealing sleeve is abutted to the inner wall of the threading hole;

and the circuit board is arranged in the shell, and is electrically connected with one end of the conductive middle connector arranged in the shell.

2. The waterproof structure of the outlet of the ventricular assist device according to claim 1, wherein the wire needle is sleeved with an insulating rubber pad, and the insulating rubber pad is arranged between the wire needle and the mounting hole.

3. The ventricular assist device outlet waterproof structure of claim 2, wherein glue is filled between the insulating rubber pad and the mounting hole.

4. The ventricular assist device outlet waterproof structure of claim 1, wherein glue is filled between the sealing sleeve and the threading hole.

5. The waterproof structure of the outlet of the ventricular assist device according to claim 4, wherein a glue spreading hole is formed on a wall of the threading hole, and the glue spreading hole penetrates through the wall of the threading hole.

6. The waterproof structure of the outlet of the ventricular assist device according to claim 1, wherein a collar is further sleeved on the cable, and the collar is clamped between the sealing sleeve and the outer cover.

7. The waterproof structure of the outlet of the ventricular assist device according to claim 1, wherein the water blocking plate is welded to the housing, the inner cap is welded to the housing, and the outer cap is welded to the inner cap.

8. The ventricular assist device outlet waterproof structure of claim 1, wherein a surface of the water deflector is covered with glue, the glue covering a junction of the water deflector and the conductive intermediate connector.