CN214342220U

CN214342220U - Lens base and capsule endoscope thereof

Info

Publication number: CN214342220U
Application number: CN202022637217.7U
Authority: CN
Inventors: 李文魁; 董宜发; 王川; 彭国会
Original assignee: Shenzhen Jifu Medical Technology Co ltd
Current assignee: Shenzhen Jifu Medical Technology Co ltd
Priority date: 2020-11-16
Filing date: 2020-11-16
Publication date: 2021-10-08
Anticipated expiration: 2030-11-16

Abstract

The invention provides a lens base.A protruding part protruding downwards is arranged at the center of the lower surface of the lens base, and a first groove used for matching with a photosensitive chip is arranged at the center of the protruding part; the bottom surface of the lens base is further provided with at least two positioning columns which are used for being matched with a first PCB arranged on the lower surface of the lens base; the center of the upper surface of the lens base is provided with a protruding part protruding upwards, and the center of the protruding part is provided with an internal thread used for being matched with a lens. The capsule endoscope further comprises a second PCB and a third PCB which are positioned at two ends of the battery, the surfaces of the second PCB and the third PCB, which are close to the battery, are respectively provided with a conductive elastic component to connect the anode and the cathode of the battery, and the outer surfaces of the second PCB, the third PCB and the battery are coated with an insulating sleeve. The lens base and the capsule endoscope thereof are convenient to assemble and stable in structure, and effectively solve the problems of stray light, black edges, light reflection and the like of images.

Description

Lens base and capsule endoscope thereof

Technical Field

The invention relates to the field of medical instruments, in particular to a capsule base and a capsule endoscope using the same.

Background

Capsule endoscopes have been developed rapidly in recent years as a new type of physical examination solution for the digestive tract. The capsule endoscope has incomparable advantages of the traditional intubation type endoscope, has the advantages of convenient examination, no wound pain, no influence on normal life of patients and the like, and has the tendency of gradually replacing the traditional intubation type enterogastroscope.

The capsule endoscope generally comprises a shell and a capsule core arranged in the shell, wherein the capsule core is a core structure of the capsule endoscope and comprises functional elements such as but not limited to a camera shooting unit, an illuminating unit, an image processing unit, a permanent magnet, a battery, a signal transmission unit, a control unit and the like, electronic components such as the camera shooting unit, the illuminating unit, the image processing unit, the signal transmission unit, the control unit and the like are arranged on at least two PCBs, and the PCBs are connected through flexible components such as FPCs and the like.

In the assembling process of the capsule core, the PCB has the tendency of bouncing under the action of the FPC, the assembly is difficult, and the FPC is easy to be extruded and distorted, so that the capsule core has bad phenomena of poor contact, short circuit, broken lines and the like. The existing capsule is used for pressing the PCB through the shell and the transparent front cover to prevent the PCB from bouncing, but because the size error of the PCB is large, the assembly error is large, the PCB is often difficult to press in actual production, the lens is inclined, and the production yield is reduced.

In order to make the images captured by the capsule endoscope in the subject more stable and free from stray light, it is required that the imaging unit and the illumination unit in the capsule endoscope can be stably fixed in the capsule core, and the capsule core is not deflected, displaced, or rotated in the capsule shell, and that the capsule endoscope is easy to assemble.

In the process of shooting images by the capsule endoscope, image quality problems such as reflection, black edges and the like easily occur, and the shading of a light source and the offset distance between a photosensitive chip and the center of a lens need to be accurately controlled.

Disclosure of Invention

In order to solve the defects of the prior art, the invention provides a lens base and a capsule endoscope using the same.

In a first aspect, the present invention provides a lens base, including a capsule shell, a capsule core and a transparent front cover, wherein the front part of the capsule shell is provided with a first step surface and a first connecting part formed by a boss protruding inwards or outwards, the transparent front cover is provided with a second step surface and a second connecting part formed by a boss protruding outwards or inwards, and the first connecting part and the second connecting part are mutually sleeved to form a fixing groove for fixing the base;

the bottom surface of the lens base is further provided with at least two positioning columns, and the positioning columns are used for being matched with a first PCB arranged on the lower surface of the lens base;

the center of the upper surface of the lens base is provided with a protruding part protruding upwards, the center of the protruding part is provided with an internal thread, and the protruding part is used for being matched with a lens arranged on the upper surface of the lens base.

Further, the center of the lower surface of the lens base is further provided with a protruding portion protruding downwards, the center of the protruding portion is provided with a first groove, and the first groove is used for being matched with a photosensitive chip arranged at the center of the first PCB.

Furthermore, the first PCB is provided with a positioning hole matched with the positioning column.

Further, further set up a plurality of LED lamp on the first PCB board, the camera lens base set up with a plurality of through-holes of LED lamp adaptation, the periphery of through-hole sets up the muscle position.

In a second aspect, the invention provides a capsule endoscope comprising the lens base of any one of the first aspect, the capsule endoscope comprises a battery, an antenna and a capsule core, the capsule endoscope further comprises a second PCB and a third PCB which are positioned at two ends of the battery, the surfaces of the second PCB and the third PCB, which are close to the battery, are both provided with a conductive elastic component, and the second PCB and the third PCB are connected with the positive electrode and the negative electrode of the battery through the conductive elastic component.

Furthermore, the second PCB, the third PCB and the outer surface of the battery are coated with an insulating sleeve or a heat-shrinkable sleeve.

Furthermore, the lower surface of the third PCB board is further provided with foam.

Further, the bottom of the capsule shell is provided with a plurality of steps and a third step surface, the third step surface is abutted against the lower surface of a third PCB, the third step surface is further provided with a positioning boss, and the third PCB is further provided with a second groove matched with the boss.

The lens base and the capsule endoscope using the same are convenient to assemble and stable in structure, and can effectively solve the problems of stray light, black edges, light reflection and the like of images.

Drawings

FIG. 1: the overall structure of the capsule endoscope of the present invention.

FIG. 2: another structure diagram of the capsule endoscope of the invention.

FIG. 3: the invention discloses a base schematic diagram of a capsule endoscope.

FIG. 4: another base of the capsule endoscope of the present invention is shown schematically.

FIG. 5: the third PCB of the capsule endoscope is schematically assembled with the capsule shell.

Description of the drawing reference numbers:

the flexible printed circuit board comprises a capsule shell 11, a transparent front cover 12, a PCB group 21, an FPC (flexible printed circuit) group 22, a camera module 23, an LED illuminating unit 24, a battery 25, an antenna 26, an insulating sleeve 27, foam 28, a lens base 231, a lens 232, a photosensitive chip 233, a first step surface 111, a first connecting part 112, a step 113, a second step surface 121, a second connecting part 122, a first PCB 211, a second PCB 212, a third PCB 213, a third step surface 1131, a positioning boss 1132, a positioning hole 2111, a spring 2121, a second groove 2131, a first groove 2311, a positioning column 2312, an internal thread 2313, a through hole 2314, a rib 2315 and a protrusion 2316.

Detailed Description

Referring to fig. 1, an overall structure diagram of the capsule endoscope of the present invention and fig. 2, another structural schematic diagram of the capsule endoscope of the present invention, the capsule endoscope of the present invention includes a capsule shell and a capsule core located in the capsule shell, the capsule shell includes a capsule shell 11 and a transparent front cover 12, and the capsule core includes a PCB board set 21, an FPC flexible flat cable set 22, a camera module 23, an LED lighting unit 24, a battery 25, and an antenna 26. The camera module consists of a lens base 231 and a lens 232.

Referring to fig. 3, a base of the capsule endoscope of the present invention is schematically illustrated, a first step surface 111 and a first connecting portion 112 formed by an inwardly protruding boss are disposed at a front portion of a capsule housing 11, a second step surface 121 and a second connecting portion 122 formed by an outwardly protruding boss are disposed at a transparent front cover 12, and the first connecting portion 112 and the second connecting portion 122 are sleeved with each other to form a fixing groove for fixing the base.

It will be understood by those skilled in the art that the capsule housing 11 of the above-mentioned embodiment may further include a first step surface 111 and a first connecting portion 112 formed by an outwardly protruding boss, and the transparent front cover may further include a second step surface 121 and a second connecting portion 122 formed by an inwardly protruding boss, wherein the first connecting portion and the second connecting portion are nested with each other to form a fixing groove for fixing the base.

The outer diameter of the lens base 231 is larger than the inner diameter of the capsule shell 11, so that the lens base 231 can be fixed in the fixing groove, the lower surface of the lens base 231 is abutted against the step surface at the end part of the capsule shell 11, the upper surface of the lens base 231 is abutted against the step surface of the transparent front cover 12, so that the capsule shell 11 and the transparent front cover 12 tightly press the base, and the pressing position precision can reach +/-0.01 mm and far exceeds the precision of a PCB (printed circuit board); the capsule shell 11 and the transparent front cover 12 are hermetically combined by glue or laser welding.

The bottom surface of the lens base 231 is provided with at least two positioning columns 2312, the first PCB 211 is provided with positioning holes 2111 matched with the positioning columns 2312, and the positioning columns 2312 are fixed with the first PCB 211 in a gluing or hot melting mode, so that the Z-axis axial positioning and the rotary positioning of the capsule core are realized, the PCB of the capsule core is not bounced upwards any more, the capsule core cannot rotate in the capsule shell 11, the production efficiency is improved, and the reject ratio in the production process is reduced.

Referring further to fig. 4, another base diagram of the capsule endoscope of the present invention, the photosensitive chip 233 is fixed at the center of the first PCB 211, the photosensitive chip 233 is square, the first PCB 211 is convex, a protrusion protruding downward is disposed at the center of the bottom surface of the lens base 231, a first groove 2311 matched with four outer surfaces of the photosensitive chip 233 is disposed at the center of the protrusion, and a certain gap exists.

The upper surface center of lens base 231 sets up the protruding portion 2316 of upwards protruding, and the center of protruding portion 2316 sets up internal thread 2313, and the latter half of camera lens sets up the external screw thread and passes through threaded connection with lens base 231, guarantees that the camera lens center pin aligns with the center pin of sensitization chip 233, makes imaging quality more stable, and the camera lens passes through the screw thread at the base internal rotation to can focus regulation.

Further set up a plurality of LED lamp on the first PCB board 211, camera lens base 231 sets up a plurality of through-holes 2314 that suit with the LED lamp size, makes the LED lamp can see through these holes, the periphery of through-hole 2314 sets up muscle position 2315 and shelters from a part light source, the periphery of protruding portion 2316 also can shelter from a part light source simultaneously, thereby avoid the light source to penetrate directly camera lens and image center and overexposure, effectively solve the camera lens formation of image fuzzy, the reflection of light, optics bad problems such as center overexposure, improve the quality of image.

In actual processing and assembly, except the lens and the LED lamp, the capsule core is exposed, and other electronic devices are covered by the lens base 231, so that the integrity of the capsule endoscope is improved, and the appearance is more attractive.

The second PCB 212 and the third PCB 213 are located at two ends of the battery 25, the surfaces of the second PCB 212 and the third PCB 213 close to the battery 25 are provided with conductive elastic components such as a spring 2121 or a spring plate, and the second PCB 212 and the third PCB 213 are in contact connection with the positive electrode and the negative electrode of the battery 25 through the spring 2121, so as to supply power to the capsule endoscope. The battery 25 is wrapped by the insulating sleeve 29 together with the second PCB 212 and the third PCB 213, and the insulating sleeve 29 is in a ring belt shape and is heated and contracted to form close contact and conduction between the spring 2121 and the two poles of the battery 25. It will be appreciated by those skilled in the art that the insulating sheath 29 may be replaced by a film-like material having thermoplastic properties, such as a heat shrink.

The first PCB 211 and the second PCB 212 are connected in a plane and fixed by glue, so that the two boards are not inclined.

The lower surface of the third PCB 213 is provided with a foam 28 or other non-conductive material with a certain height, the foam is a medium with a certain dielectric constant, and the foam is placed between the antenna radiator and the ground, so that the space requirement of the antenna can be reduced, the size of the antenna can be reduced, and the antenna with better performance can be designed in a smaller space.

Antenna 26 is FPC flexible soft board, can buckle certain radian and difficult damaged, antenna 26 arranges in the bottom of bubble cotton 28, and bubble cotton 28 can be implemented ground isolation and keep certain spatial distance with the irradiator of antenna 226 and radio frequency PCB board, does benefit to antenna signal's radiation.

The height of the foam 28 can be flexibly designed according to the performance of the antenna, and the antenna 26 is ensured to be far away from the radio frequency transmitter, the battery 25 and other electronic elements as far as possible, so that the performance of the antenna is improved, and the stable transmission of radio frequency signals is realized.

Referring further to fig. 5, an assembly diagram of the third PCB and the capsule shell of the capsule endoscope of the present invention is shown, wherein a plurality of steps 113 and a third step surface 1131 are disposed at the bottom of the capsule shell 11, and the third step surface 1131 abuts against the lower surface of the third PCB 213, so as to ensure that the capsule core is kept stable and not inclined in the capsule shell, the third step surface 1131 is further provided with a positioning boss 1132, the third PCB 213 is further provided with a second groove 2131 matched with the boss 1132, when the capsule core is loaded into the capsule shell 11, the second groove 2131 of the third PCB 213 aligns with the boss 1132, so as to ensure that the capsule core is accurately positioned in the capsule shell 11 and cannot rotate or displace.

When the above-described solution of the capsule endoscope is applied to a dual-lens capsule endoscope, the antenna may be arranged in the gap between the capsule core and the housing, as will be apparent to those skilled in the art.

The lens base and the assembly process thereof stably fix the camera module and the LED lighting unit in the capsule shell 11, and have the advantages of no displacement and deflection, convenient assembly, stable structure and high appearance integrity, thereby ensuring that a capsule endoscope shoots high-quality image information.

Claims

1. A lens base comprises a capsule shell, a capsule core and a transparent front cover, and is characterized in that the front part of the capsule shell is provided with a first step surface and a first connecting part which are formed by a boss which protrudes inwards or outwards, the transparent front cover is provided with a second step surface and a second connecting part which are formed by a boss which protrudes outwards or inwards, and the first connecting part and the second connecting part are mutually sleeved to form a fixing groove for fixing the base;

2. The lens mount as claimed in claim 1, wherein a protrusion protruding downward is further provided at the center of the lower surface of the lens mount, and a first groove is provided at the center of the protrusion for engaging with the photo sensor chip provided at the center of the first PCB.

3. The lens mount as claimed in claim 1, wherein the first PCB is provided with positioning holes for cooperating with the positioning posts.

4. The lens base according to claim 1, wherein a plurality of LED lamps are further arranged on the first PCB, the lens base is provided with a plurality of through holes matched with the LED lamps, and the peripheries of the through holes are provided with rib positions.

5. A capsule endoscope comprising the lens base of any one of claims 1 to 4, comprising a battery, an antenna and a capsule core, wherein the capsule endoscope further comprises a second PCB and a third PCB which are positioned at two ends of the battery, the surfaces of the second PCB and the third PCB close to the battery are both provided with a conductive elastic component, and the second PCB and the third PCB are connected with the positive electrode and the negative electrode of the battery through the conductive elastic component.

6. The capsule endoscope of claim 5, wherein the second and third PCB boards and the outer surface of the battery are covered with an insulating sleeve or a heat shrink sleeve.

7. The capsule endoscope of claim 5, wherein the lower surface of the third PCB board is further provided with foam.

8. The capsule endoscope of claim 5, wherein the bottom of the capsule shell is provided with a plurality of steps and a third step surface, the third step surface abuts against the lower surface of a third PCB, the third step surface is further provided with a positioning boss, and the third PCB is further provided with a second groove matched with the boss.