CN115467974A - Sealing device and capsule endoscope - Google Patents

Abstract

The invention discloses a sealing device, which comprises a front shell and a tail cover, wherein the front shell and the tail cover are respectively provided with a first connecting part and a second connecting part, the first connecting part is provided with a first end surface and a first inner side wall, the second connecting part is provided with a second end surface, a step surface and a second outer side wall, the first connecting part and the second connecting part are connected with each other through threads, a sealing ring is arranged between the first connecting part and the second connecting part, the sealing ring is provided with a first part and a second part, the first part and the second part are integrally formed, and the second part extends into the space of the contact parts of the first connecting part and the second connecting part.

Description

Sealing device and capsule endoscope

Technical Field

The invention relates to the field of medical instruments, in particular to a sealing device and a capsule endoscope thereof.

Background

The capsule endoscope is widely applied to clinical diagnosis of digestive tract diseases, has the advantages of convenient examination, no wound, no pain, no cross infection, no influence on normal work of an examinee and the like, has good examined examination to the examinee, enters the examinee through the examinee in an oral mode, shoots the condition of internal tissues at a short distance through the camera shooting assembly, transmits the shot image data to an external image receiving device in a wireless transmission mode, receives and displays the image data on display equipment through the image receiving device, is convenient for clinical diagnosis, and overcomes the defect of poor tolerance of the traditional plug-in endoscopy.

However, compared with the conventional mechanical insertion endoscopy, the cost of the capsule endoscope is higher, the price is still much higher than that of the conventional endoscopy, most of the examinees are hard to bear the material consumption cost, and the wireless capsule endoscope limits various electronic components into a small capsule shell, the components at least comprise a lighting device, a camera system, an internal magnet, a wireless transmission unit, a battery unit and the like, and the components are required to be arranged in the narrow space of the capsule, so that the design complexity is increased, the cost is increased, and the sealing performance of the capsule endoscope is considered.

Chinese patent CN 112716431A discloses a capsule endoscope, in which a first shell and a second shell are connected by screw threads to facilitate replacement of the shell, thereby realizing recycling of a core assembly of the capsule endoscope, avoiding waste of a large amount of precision instruments and saving cost, the first shell and the second shell are sealed by a screw thread structure and a sealing ring, so as to effectively prevent water and liquid from permeating, but the sealing structure cannot be used in a large scale in a production process, firstly, the capsule endoscope has a smaller and smaller volume, so that the wall thicknesses of the first shell and the second shell are thinner and thinner, and the volume of the sealing ring is smaller in a limited space, so that the sealing performance of the structure is greatly reduced in an actual production process, and when the screw threads are screwed too tightly, the shell has a risk of cracking; secondly, because the sealing washer volume is too little, the installation is difficult, and because of the tolerance reason, there is certain clearance in the installation of sealing washer and the installation face of shell, in the screw thread tightening process, local atress is too big between the installation face of sealing washer and shell and leads to the sealing washer extrusion deformation, thereby partial volume of sealing washer is extrudeed the outside of shell thereby can't reach sealed effect even.

Therefore, there is a need for further improvement in the existing capsule endoscope sealing process.

Disclosure of Invention

The invention aims to overcome the defects in the prior art, improve the sealing performance of the capsule endoscope and improve the product competitiveness.

In a first aspect, the present invention provides a sealing device, including a front housing and a tail cap, where the front housing is provided with a first connecting portion, the tail cap is provided with a second connecting portion, the first connecting portion and the second connecting portion are connected with each other through a thread, a sealing ring is further provided in a contact space between the first connecting portion and the second connecting portion, the sealing ring has a first portion and a second portion, the first portion and the second portion are integrally formed, and the second portion extends into a space between the contact portions of the first connecting portion and the second connecting portion.

Furthermore, the first connecting portion is provided with a first end face and a first inner side wall, and the second connecting portion is provided with a second end face, a step face and a second outer side wall.

Further, the seal ring is arranged between the first connecting portion and the second connecting portion.

Further, the first part of the sealing ring is provided with an upper surface and a lower surface, the upper surface and the lower surface are respectively contacted with the first end surface and the step surface, the upper surface and the capsule axis form an angle beta 1, 90 degrees < beta 1<180 degrees, the first end surface and the capsule axis form an angle beta 2, 90 degrees < beta 2<180 degrees, and the angle beta 1 is more than or equal to beta 2.

Furthermore, the second part of the sealing ring is provided with an inner side surface and an outer side surface, the outer side surface is in contact with the first inner side wall, and the outer side surface and the axial direction of the capsule form an angle alpha 1,0 degrees < alpha 1< 90 degrees; the first inner side wall and the axial direction of the capsule form an angle alpha 2, wherein alpha 2 is more than 0 degrees and less than 90 degrees, and alpha 1 is more than or equal to alpha 2.

Furthermore, the lower surface of the sealing ring and the axial direction of the capsule form an angle theta 1, and the theta 1 is more than or equal to 90 degrees and less than 180 degrees.

Further, the cross section of the first part and the cross section of the second part of the sealing ring are in an L shape or a V shape.

Furthermore, the sealing ring is made of any one of materials of silica gel, thermoplastic polyurethane elastomer rubber and synthetic rubber.

Furthermore, the sealing ring and the tail cover are integrally formed by adopting a secondary injection molding or a bijection mold.

Furthermore, the lower surface and the inner side surface of the sealing ring are respectively bonded with the step surface and the second outer side wall of the tail cover.

Furthermore, the lateral wall of preceding shell sets up first scale and second scale, the lateral wall of tail-hood sets up the third scale, when the third scale lies in between first scale and the second scale, shows that the threaded connection of preceding shell and tail-hood targets in place.

In a second aspect, the present invention provides a capsule endoscope comprising a front housing and a tail cap, the capsule endoscope employing the sealing device of any one of the first aspect.

Furthermore, a capsule inner core is further arranged in an accommodating cavity formed by the front shell and the tail cover of the capsule endoscope, an elastic gasket is arranged at the rear end of the capsule inner core, the elastic gasket is of a circular ring structure, the upper surface of the elastic gasket is tightly attached to the rear end face of the capsule inner core, and the lower surface of the elastic gasket is tightly attached to the second end face.

The sealing ring can be tightly connected with the front shell and the rear shell, and the sealing ring is more and more extruded in the axial direction and the radial direction of the capsule endoscope when the thread is screwed down, so that the sealing ring is tightly contacted with the end surface and the side surface of the connecting part of the front shell and the tail cover which are mutually connected, the double sealing effect is achieved, and the sealing performance is more reliable.

Drawings

FIG. 1: the invention relates to an overall sectional view of a capsule endoscope.

FIG. 2 is a schematic diagram: the seal ring structure of the invention is schematically shown.

FIG. 3: a close-up view of the seal ring structure.

FIG. 4 is a schematic view of: the capsule endoscope of the present invention is schematically assembled.

Detailed Description

The present invention will be described in further detail with reference to the drawings and examples, it being understood that the specific embodiments described herein are illustrative of the invention and are not to be construed as limiting the invention.

Each serial number and corresponding name are respectively: the capsule comprises a camera shooting illumination area 101, a second end face 102, an internal thread 103, an external thread 104, a first inner side wall 105, a second outer side wall 106, a first end face 107, a step face 108, a front shell 109, a capsule core 110, a capsule core rear end face 111, an elastic gasket 112, a first connecting part 113, a sealing ring 114, a second connecting part 115, a tail cover 116, an inner side face 201, an outer side face 202, an upper surface 203, a lower surface 204, a sealing ring end part 205, a first part 206, a second part 207, a first scale 401, a second scale 402 and a third scale 403.

Referring to fig. 1, an overall cross-sectional view of a capsule endoscope of the present invention includes a front housing 109 and a tail cap 116, a port of the front housing 109 is provided with a first protrusion 113 formed by a first protrusion protruding inward or outward, the tail cap 116 is provided with a second protrusion protruding outward or inward to form a second connection portion 115, the first connection portion 113 and the second connection portion 115 are connected to each other by a screw thread, the first connection portion 113 forms a first end surface 107 and a first inner sidewall 105, and the second connection portion 115 forms a second end surface 102, a step surface 108 and a second outer sidewall 106.

The sealing device of the present invention further comprises a sealing ring 114 disposed between the first connecting portion 113 and the second connecting portion 115, and referring to fig. 2, a schematic diagram of the structure of the sealing ring of the present invention, and a partially enlarged view of the structure of the sealing ring of fig. 3, the sealing ring 114 has a sealing ring end 205, the sealing ring 114 comprises a two-part structure, an upper surface 203 and a lower surface 204 of a first part 206 are respectively in contact with the first end surface 107 and the step surface 108, and a second part 207 extends into a space of the contact portion of the first connecting portion 113 and the second connecting portion 115, when the front shell 109 and the tail cap 116 are screwed together, the sealing ring 114 is pressed more and more in the axial direction and the radial direction of the capsule endoscope, respectively, thereby achieving a double sealing effect, and further improving the sealing performance of the capsule endoscope.

In the first embodiment of the present invention, the inner side wall 105 of the first connection portion 113 of the front shell 109 is provided with the internal thread 103, the outer side wall 106 of the second connection portion 115 of the tail cap 116 is provided with the external thread 104, the internal thread 103 and the external thread 104 are engaged with each other, the first portion 206 and the second portion 207 of the seal ring 114 are L-shaped in cross section, the first portion 206 includes the upper surface 203 and the lower surface 204, the upper surface 203 is in contact with the first end surface 107 of the front shell 109, the lower surface 204 is in contact with the step surface 108 of the tail cap 116, further, the upper surface 203 may form an angle β 1,0 ° < β 1<180 ° with the axial direction of the capsule, the first end surface 107 forms an angle β 2,0 ° < β 2<180 °, β 1 ≧ β 2, and β 2 with the axial direction of the capsule, so that the upper surface 203 of the seal ring 114 and the first end surface 107 of the front shell 109 form an inclined surface, when the front shell 109 and the tail cap 116 are screwed together, the internal thread 103 and the internal thread 103 presents a pressure that presses the external thread 104 inwardly against the first end surface of the shell 109, and the inclined surface 113 of the front shell 109 is pressed against the outer shell 109, thereby ensuring that the capsule is continuously pressed against the outer shell 113 and the reliability of the capsule.

In the second embodiment of the present invention, the inner side wall 105 of the first connection portion 113 of the front shell 109 is provided with the internal thread 103, the outer side wall 106 of the second connection portion 115 of the tail cap 116 is provided with the external thread 104, the internal thread 103 and the external thread 104 are matched with each other, the cross sections of the first portion 206 and the second portion 207 of the sealing ring 114 are V-shaped, the first portion 206 comprises an upper surface 203 and a lower surface 204, the upper surface 203 is in contact with the first end surface 107 of the front shell 109, the lower surface 204 is in contact with the step surface 108 of the tail cap 116, further, the upper surface 203 can form a certain angle β 1,0 ° < β 1<180 ° with the axial direction of the capsule, the first end surface 107 forms an angle β 2,0 ° < β 2<180 °, β 1 ≧ β 2 with the axial direction of the capsule, so that the upper surface 203 of the sealing ring 114 and the first end surface 107 of the front shell 109 form an inclined plane. Furthermore, the lower surface 204 of the first portion 206 of the sealing ring 114 forms a certain angle θ 1 with the axial direction of the capsule, θ 1 is greater than or equal to 90 degrees and less than 180 degrees; the step surface 108 is tightly fitted to the lower surface 204, the step surface 108 also forming an angle θ 1 with the axial direction of the capsule. The upper surface 203 and the lower surface 204 may be parallel or non-parallel, so that the upper surface 203 of the sealing ring and the first end surface 107 of the front shell 109 form an inclined surface, the lower surface 204 and the step surface 108 of the tail cover 116 form an inclined surface, when the threads are tightened, the inclined surface enables the first connecting part 113 of the front shell 109 to be pressed inwards in the radial direction of the capsule, and the first connecting part 113 of the front shell 109 is prevented from continuously expanding outwards and cracking, so that the sealing performance reliability of the capsule shell is ensured.

The second portion 207 of the sealing ring 114 comprises an inner side 201 and an outer side 202, the inner side 201 is tightly connected with the second outer side 106 of the second connecting portion 115 of the tail cap 116, the outer side 202 is at an angle α 1,0 ° < α 1< 90 ° with respect to the axial direction of the capsule, further, the outer side 202 of the second portion 207 of the sealing ring 114 is in contact with the first inner side 105 of the first connecting portion 113 of the front shell 109, the first inner side 105 thereof is at an angle α 2,0 ° < α 2< 90 ° with respect to the axial direction of the capsule, and α 1 is greater than or equal to α 2, so that the end of the first connecting portion 113 of the front shell 109 forms a tapered opening, when the front shell 109 and the tail cap 116 are screwed together, the second portion 207 of the sealing ring 114 starts to enter the tapered opening, because the size of the tapered opening is greater than the size of the end of the sealing ring 114, the second portion 207 of the sealing ring 114 can easily enter the space between the first connecting portion 113 and the second connecting portion 115 completely, when the whole sealing ring 114 and the tail cap 116 are screwed together, and the sealing ring 114 is not pressed more and more tightly against the outer side wall 106 of the capsule, thereby ensuring that the sealing ring 114 is pressed by the outer side wall 114.

The material of the sealing ring 114 is made of a high polymer material, such as silicone rubber, thermoplastic polyurethane elastomer rubber, synthetic rubber, etc., preferably, the sealing ring 114 is integrally formed with the tail cap 116 by a secondary injection molding or a two-shot molding, so that when assembling the capsule core, the sealing ring 114 does not need to be assembled separately, which makes the assembly process simpler.

In another embodiment of the present invention, the sealing ring 114 may also be separately disposed, and during assembly, the sealing ring 114 and the tail cover 116 are assembled first, and then the tail cover 116 and the front shell 109 are assembled in place, further, since the lower surface 204 and the inner side surface 201 of the sealing ring 114 are respectively tightly attached to the step surface 108 and the outer side wall 106 of the tail cover 116, during the process of screwing the thread, the sealing ring 114 is not extruded and deformed due to the local over-force of the sealing ring 114 and the first end surface 107, and even a part of the volume of the sealing ring 114 is extruded to the outside of the capsule shell, so that the sealing effect cannot be achieved.

The invention also provides a capsule endoscope adopting the sealing device, a capsule inner core 110 is further arranged in a containing cavity formed by a front shell and a tail cover of the capsule endoscope, the front end of the capsule inner core 110 is a camera shooting illumination area 101, and the rear end is a capsule inner core rear end surface 111; the rear end of the capsule core 110 is provided with an elastic gasket 112, the elastic gasket 112 is of a circular ring structure, the upper surface of the elastic gasket 112 is tightly attached to the rear end face 111 of the capsule core, and the lower surface of the elastic gasket 112 is tightly attached to the second end face. Before assembly, the capsule core 110 is put into the front shell 109, the tail cap 116 with the sealing ring 114 is screwed with the front shell 109, the sealing ring 114 is tightly contacted with the end surface and the side wall of the connecting part of the front shell 109 and the tail cap 116 which are connected with each other, so as to achieve double sealing effect, at the moment, the second end surface 102 of the second connecting part 115 of the tail cap 116 is tightly contacted with the elastic gasket 112, and the elastic gasket 112 is made of high molecular elastic material, so that the contact surface can be in interference fit, so that the capsule core 110 is positioned in the axial direction of the capsule endoscope and cannot shake in the shell.

Referring to fig. 4, the outer side wall 106 of the front shell 109 is provided with a first scale 401 and a second scale 402, the outer side wall 106 of the tail cover 116 is provided with a third scale 403, the upper surface 203 of the sealing ring is in contact with the first end surface 107 of the first connecting part 113 of the front shell 109 after the threads are screwed for several turns, and the third scale 403 is located between the first scale 401 and the second scale 402 when the threads are further screwed, which indicates that the threads are screwed in place, so as to prevent liquid entering due to poor sealing performance of the capsule endoscope caused by the threads not being screwed in place or breakage of the outer shell caused by too much screwing of the threads.

The sealing ring can be tightly connected with the front shell and the rear shell, and the sealing ring is more and more extruded in the axial direction and the radial direction of the capsule endoscope respectively when the thread is screwed down, so that the sealing ring is tightly contacted with the end surface and the side surface of the connecting part of the front shell and the tail cover which are mutually connected, the double sealing effect is achieved, and the sealing performance is more reliable.

In conclusion, the sealing device has more reliable sealing performance and simple and convenient assembly process, thereby more realizing the reutilization of the capsule core and avoiding the waste of a large number of electronic components.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims (13)

1. The utility model provides a sealing device, includes preceding shell and tailcap, preceding shell sets up first connecting portion, the tailcap sets up the second connecting portion, first connecting portion and second connecting portion pass through screw thread interconnect, its characterized in that, still set up the sealing washer in the contact space of first connecting portion and second connecting portion, the sealing washer has first portion and second portion, first portion and second portion integrated into one piece, the second portion stretches into the space of the contact portion of first connecting portion and second connecting portion.

2. The seal of claim 1, wherein the first connection provides a first end surface and a first inner sidewall, and the second connection provides a second end surface, a step surface, and a second outer sidewall.

3. A sealing device according to claim 2, wherein the sealing ring is disposed between the first and second connection portions.

4. Sealing device according to claim 2, wherein the first portion of the sealing ring is provided with an upper surface and a lower surface, which upper and lower surfaces are in contact with the first end surface and the step surface, respectively, the upper surface being at an angle β 1, 90 ° < β 1 and 180 ° to the capsule axis, the first end surface being at an angle β 2, 90 ° < β 2 and 180 °, β 1 ≧ β 2.

5. The sealing device according to claim 1, characterized in that the second portion of the sealing ring presents an inner side face and an outer side face, the outer side face being in contact with the first inner side face, the outer side face being at an angle α 1,0 ° < α 1< 90 ° to the axial direction of the capsule; the first inner side wall and the axial direction of the capsule form an angle alpha 2, wherein alpha 2 is more than 0 degrees and less than 90 degrees, and alpha 1 is more than or equal to alpha 2.

6. Sealing device according to claim 1, wherein the lower surface of the sealing ring is at an angle θ 1 with the axial direction of the capsule, θ 1 being 90 ° ≦ θ 1<180 °.

7. The seal of claim 1, wherein the first and second portions of the seal ring are either L-shaped or V-shaped in cross-section.

8. The seal of claim 1, wherein said seal ring is made of any one of silicone rubber, thermoplastic polyurethane elastomer rubber, and synthetic rubber.

9. The seal of claim 1, wherein the seal ring is integrally formed with the tail cap by a two-shot or two-shot mold.

10. The seal of claim 1, wherein the lower surface and the inner side surface of the seal ring are bonded to the step surface and the second outer side wall of the tail cap, respectively.

11. The sealing device according to claim 1, wherein the outer side wall of the front shell is provided with a first scale and a second scale, the outer side wall of the tail cover is provided with a third scale, and when the third scale is positioned between the first scale and the second scale, the threaded connection of the front shell and the tail cover is in place.

12. A capsule endoscope comprising a front housing and a tail cap, wherein the capsule endoscope employs the sealing device of any one of claims 1-10.

13. The capsule endoscope as in claim 12, wherein the accommodating cavity formed by the front shell and the tail cover of the capsule endoscope is further provided with a capsule inner core, the rear end of the capsule inner core is provided with an elastic gasket, the elastic gasket is of a circular ring structure, the upper surface of the elastic gasket is tightly attached to the rear end face of the capsule inner core, and the lower surface of the elastic gasket is tightly attached to the second end face.

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