Lens base, distal module, endoscope, and assembly method for distal module

1. A distal module, comprising:

a camera module and lens base;

the camera module comprising a camera unit, an illumination unit, and a support unit, the camera unit and the illumination unit are arranged on the same side of the support unit;

the camera unit, the illumination unit and the support unit are integrally arranged;

the lens base comprising a lens base body made of a transparent material;

the lens base body comprising a side wall, a camera module accommodating portion, and a camera module opening portion;

wherein the lens base body is axially provided with the camera module accommodating portion, and the camera module accommodating portion comprises a camera channel and an illumination channel, a side wall of the illumination channel coated with a light shielding layer;

the side wall of the lens base body is provided with the camera module opening portion;

the camera module opening portion comprises a first opening portion and a second opening portion;

the first opening portion and the second opening portion are located on the side wall and are adjacent to each other, wherein the first opening portion is connected with the camera channel and the second opening portion is connected with the illumination channel;

the first opening portion is configured to mount the camera unit into the camera channel;

the second opening portion is configured to mount the illumination unit into the illumination channel;

wherein the camera module is at least partially accommodated in the camera module accommodating portion; and

wherein the illumination unit is contained inside the lens base body and is located at a distance away from a front surface of the lens base body.

2. The distal module according to claim 1 , wherein the distal module further comprises:

a sleeve, and the sleeve is sleeved on a peripheral wall of the lens base.

3. The distal module according to claim 1 , wherein the distal module further comprises:

a lens, wherein the lens covers an outlet of the camera channel.

4. An endoscope, comprising:

a handle portion and an insertion portion,

wherein the insertion portion comprises a bending portion and the distal module according to claim 1 ; and

the bending portion is fixedly connected to the distal nodule.

5. The endoscope according to claim 4 , wherein t further comprises:

a sleeve, and the sleeve is sleeved on a peripheral wall of the lens base.

6. The endoscope according to claim 4 , wherein the distal module further comprises:

a lens, wherein the lens covers an outlet of the camera channel.

7. The endoscope according to claim 4 , wherein in the distal module, the illumination unit is contained inside the lens base body and is located at a distance away from a front surface of the lens base body.

8. An assembly method for the distal module according to claim 1 , comprising the following steps:

S 10 : mounting the camera module into the camera module accommodating portion from the camera module opening portion; and

S 20 : sleeving the lens base sleeve on a peripheral wall of the lens base.

9. The assembly method according to claim 8 , wherein the distal module further comprises:

a sleeve, and the sleeve is sleeved on the peripheral wall of the lens base.

10. The assembly method according to claim 8 , wherein the distal module further comprises:

a lens, wherein the lens covers an outlet of the camera channel.

11. The assembly method according to claim 8 , wherein in the distal module, the illumination unit is contained inside the lens base body and is located at a distance away from a front surface of the lens base body.

12. The distal module according to claim 1 , wherein

the lens base further comprises an operation channel;

a side wall of the operation channel facing the lens base body is provided with a third, opening portion; and

the third opening portion is configured to mount an operation tube.