Circuit board, endoscope and its front-end components

Abstract

The present application belongs to the field of medical device technology, and specifically relates to a circuit board, an endoscope and a front-end component thereof. The circuit board is applied to the front-end component of the endoscope, and the circuit board is provided with an electrical contact for electrically connecting to the light source of the endoscope. The circuit board has a shading portion, and the two opposite sides of the shading portion are respectively formed with a first space and a second space, the first space is used to accommodate a part of the camera module, and the second space is used to accommodate at least a part of the light emitting portion of the light source. In practice, the shading portion of the present application is located between the light source and the camera module, so that at least part of the light emitted by the light source and directed to the camera module will be blocked by the shading portion to reduce the light directly directed to the camera module, and even avoid the light directly directed to the camera module. Obviously, this can reduce the risk of light leaking into the camera module, and even avoid light leaking into the camera module, thereby improving the imaging quality of the camera module and facilitating observation by the operator.

Description

Technical Field

[0001] The present application belongs to the field of medical device technology, and specifically relates to a circuit board, an endoscope and a front-end component thereof. Background Art

[0002] An endoscope is a commonly used medical device that can provide doctors with sufficient diagnostic information to treat diseases. The endoscope includes an insertion part that can enter the human body through a human cavity or a surgical incision. An imaging component is provided at the distal end of the insertion part. The imaging component includes a camera module and a light source. The light source can illuminate the diseased area to facilitate the camera module to capture images of the diseased area.

[0003] However, the light emitted by the light source in the traditional imaging component is easy to leak into the camera module, and the light is scattered in the camera module, which can easily lead to the degradation of the imaging quality of the camera module and affect the observation effect. Summary of the invention

[0004] The purpose of this application is to provide a circuit board, an endoscope and a front-end component thereof, which can help solve the problem that light emitted by a light source easily leaks into a camera module.

[0005] In order to solve the above technical problems, this application is implemented as follows:

[0006] In a first aspect, the present application provides a circuit board, which is applied to the front end component of an endoscope, and the circuit board is provided with electrical contacts for electrically connecting to the light source of the endoscope, and the circuit board has a light-shielding portion, and a first space and a second space are respectively formed on two opposite sides of the light-shielding portion, the first space is used to accommodate a part of the camera module, and the second space is used to accommodate at least a part of the light output part of the light source.

[0007] In a second aspect, the present application provides a front end assembly of an endoscope, including a front end shell, a light source and the above-mentioned circuit board, the light source and the circuit board are both arranged in the front end shell, and at least part of the light output portion is arranged in the second space.

[0008] In a third aspect, the present application provides an endoscope comprising the above-mentioned front end assembly.

[0009] The beneficial technical effects of this application are as follows:

[0010] In the present application, the circuit board has a shading portion, and the opposite sides of the shading portion form a first space and a second space respectively. When the front end assembly of the endoscope uses the circuit board of the present application, at least part of the light emitting portion of the light source will be located in the second space, and part of the camera module will be located in the first space. That is to say, the shading portion is located between the light source and the camera module, so that at least part of the light emitted by the light source that directly shoots toward the camera module will be blocked by the shading portion to reduce the light directly shooting toward the camera module, and can even avoid the light directly shooting toward the camera module. Obviously, this can reduce the risk of light leaking into the camera module, and can even avoid light leaking into the camera module, thereby improving the imaging quality of the camera module and facilitating observation by the surgeon. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a schematic diagram of assembling a circuit board, a spacer block and a light source disclosed in the first embodiment of the present application;

[0012] Figure 2 This is a schematic diagram of the assembly of the circuit board, the spacer block, the light source and the camera module disclosed in the first embodiment of the present application;

[0013] Figure 3 This is a schematic diagram of the structure of a circuit board disclosed in the second embodiment of the present application;

[0014] Figure 4 This is a schematic diagram of assembling a circuit board, a spacer block and a light source disclosed in the second embodiment of the present application;

[0015] Figure 5 This is a schematic diagram of the structure of a circuit board disclosed in the third embodiment of the present application;

[0016] Figure 6 This is a schematic diagram of assembling a circuit board, a spacer block and a light source disclosed in the third embodiment of the present application;

[0017] Figure 7 This is a schematic diagram of assembling a circuit board, a spacer block, a light source and a conductive member disclosed in the fourth embodiment of the present application;

[0018] Figure 8 This is a cross-sectional view of a partial structure of an endoscope disclosed in an embodiment of the present application.

[0019] Description of reference numerals:

[0020] 100, camera module installation section; 200, extension section; 210, shading part; 220, connecting part; 230, bending part; 240, positioning section; 241, first part; 242, second part; 243, third part; 244, groove; 300, connecting section; 400, front end shell; 500, light source; 600, spacer block; 610, positioning groove; 700, conductive part; 810, filling space; 910, camera module. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0022] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0023] Combine the following Figures 1 to 8 , the circuit board, endoscope and front-end components provided in the embodiments of the present application are described in detail through specific embodiments and their application scenarios.

[0024] In each embodiment of the present application, "proximal end" and "distal end" refer to the position of the endoscope and its components relative to the user in the use environment, wherein the end closer to the user is designated as the "proximal end" and the end farther from the user is designated as the "distal end".

[0025] The present application embodiment discloses a circuit board. Figure 1 , Figure 3 and Figure 5 , applied to the front end component of the endoscope, the circuit board is provided with electrical contacts for electrically connecting to the light source 500 of the endoscope, the circuit board has a light shielding portion 210, and the light shielding portion 210 has a first space and a second space formed on two opposite sides, that is, the light shielding portion 210 has a first space and a second space formed on two sides in the thickness direction thereof, the first space is used to accommodate a part of the camera module 910, and the second space is used to accommodate at least a part of the light emitting portion of the light source 500. Optionally, the light emitting portion may include a lamp bead, and a power supply portion may be further provided below the lamp bead, the lamp bead is electrically connected to the power supply portion, and power may be supplied to the lamp bead through the power supply portion, the light emitting portion may also include a packaging layer, the lamp bead is embedded in the packaging layer, the structure of the light source 500 is a prior art, and this application will not elaborate on it.

[0026] In the present application, the circuit board has a shading portion 210, and the opposite sides of the shading portion 210 form a first space and a second space respectively. When the front end component of the endoscope uses the circuit board of the present application, at least part of the light emitting portion of the light source 500 will be located in the second space, and part of the camera module 910 will be located in the first space. That is to say, the shading portion 210 is located between the light source 500 and the camera module 910, so that at least part of the light emitted by the light source 500 that is directly directed to the camera module 910 will be blocked by the shading portion 210 to reduce the light directly directed to the camera module 910, and even avoid the light from being directly directed to the camera module 910. Obviously, this can reduce the risk of light leaking into the camera module 910, and even avoid light leaking into the camera module 910, thereby improving the imaging quality of the camera module 910 and facilitating observation by the surgeon.

[0027] In addition, the addition of the shading portion 210 to the circuit board can give the circuit board a larger wiring area, which can set a larger wiring layer on the circuit board to lay out more lines; and as the size of the wiring layer increases, the copper in the wiring layer will also increase, which can improve the thermal conductivity of the circuit board.

[0028] In some embodiments, the circuit board may include a relatively bent shading portion 210 and a mounting portion, which cooperate to form a second space. The mounting portion can carry the light source 500, and the electrical contacts may be provided on a side of the mounting portion facing the second space.

[0029] In an optional embodiment, the electrical contact is provided on the side of the light shielding portion 210 facing the second space, and the electrical contact can be welded with the pins located on the side of the light source 500. In this embodiment, the electrical contact is provided on the side of the light shielding portion 210 facing the second space, so that the pins on the side of the light source 500 can be directly welded to the electrical contact, without using other conductive components to indirectly connect the light source 500 and the electrical contact, which can simplify the connection structure between the light source 500 and the electrical contact; in addition, the mounting portion in the previous embodiment can be omitted in this embodiment, and the light shielding portion 210 can be directly used to mount the light source 500, which can reduce the size of the circuit board to achieve the purpose of cost saving.

[0030] In another optional embodiment, the electrical contacts may also be arranged on a side of the shading portion 210 facing away from the second space. In this case, the electrical contacts and the pins of the light source 500 can be indirectly connected through conductive components such as cables. This application does not limit the location of the electrical contacts.

[0031] And / or, in an optional embodiment, the circuit board includes two extension sections 200 arranged back to back, the far ends of the extension sections 200 form a shading portion 210, and a camera module installation cavity is formed between two mutually facing board surfaces of the two extension sections 200, and the camera module installation cavity includes a first space.

[0032] In this embodiment, the number of the extension sections 200 is two, and the two extension sections 200 are respectively powered by the corresponding light sources 500, and the two extension sections 200 are both formed with a shading portion 210, which can enhance the shading effect of the circuit board on the light source 500, thereby improving the imaging quality of the camera module 910; in addition, the camera module installation cavity is located between the two mutually facing board surfaces of the two extension sections 200, so that when the camera module 910 is installed in the camera module installation cavity, the camera module 910 can be 0 is fitted with at least one extension section 200, so that the extension section 200 can be used to conduct the heat generated by the camera module 910, thereby preventing the heat from accumulating around the camera module 910 and reducing the life of the camera module 910, and the camera module 910 is fitted with the plate surface of the extension section 200, which can make the camera module 910 and the extension section 200 have a larger contact area, thereby improving the thermal conductivity of the extension section 200 to further prevent the heat from accumulating around the camera module 910.

[0033] In a further embodiment, the circuit board also includes a camera module mounting section 100, and the two extension sections 200 are respectively located on opposite sides of the camera module mounting section 100, and the two extension sections 200 are connected to and intersect with the camera module mounting section 100, that is, the straight line where the extension direction of the extension section 200 is located intersects with the straight line where the extension direction of the camera module mounting section 100 is located, and the camera module mounting section 100 and the two extension sections 200 surround to form a camera module mounting cavity, and the end of the extension section 200 away from the camera module mounting section 100 is the distal end of the extension section 200, that is, the two extension sections 200 extend in the same direction.

[0034] In this embodiment, the camera module mounting section 100 can be used to carry the camera module 910, and the camera module 910 can be directly welded to the camera module mounting section 100, so there is no need to set up other power supply structures to power the camera module 910. Of course, the circuit board may not include the camera module mounting section 100. In this case, other power supply structures may be used, such as a flexible circuit board, a printed circuit board or a cable independent of the circuit board of the present application to power the camera module 910. In this case, the extension section 200 can be directly connected to the connecting section 300 described later; in other embodiments, the circuit board may not include the extension section 200. In this case, the circuit board may only include the shading portion 210, and the electrical contacts are provided on the shading portion 210.

[0035] In a further embodiment, the circuit board also includes a connecting section 300, the distal end of the connecting section 300 is connected to the camera module mounting section 100, and the proximal end of the connecting section 300 can extend into the operating handle of the endoscope, and the light source 500 and the camera module 910 can be powered by the connecting section 300.

[0036] In some embodiments, the camera module 910 includes a lens and a photosensitive chip, and the photosensitive chip is arranged on the proximal side of the lens. The photosensitive chip and the light source 500 are respectively located on opposite sides of the light shielding portion 210, so that the light emitted by the light source 500 does not directly irradiate the photosensitive chip. Therefore, in some optional embodiments, the camera module 910 may not be provided with a housing structure for mounting the lens and the photosensitive chip, which is beneficial to reducing the internal space of the endoscope front end assembly occupied by the camera module 910, and is beneficial to reducing the size of the endoscope front end assembly.

[0037] The present application also discloses a front end assembly of an endoscope, see Figure 1 , Figure 2 , Figure 4 , Figure 6 and Figure 7 , including a front end shell 400, a light source 500 and a circuit board as described in any of the above embodiments, the light source 500 and the circuit board are both arranged in the front end shell 400, and at least part of the light output portion is arranged in the second space. Since the front end assembly of this embodiment includes a circuit board, the front end assembly has the beneficial effects of the above circuit board, which will not be repeated here.

[0038] In an alternative embodiment, see Figure 6 , the distal edge of the light shielding portion 210 extends beyond the light emitting portion in the direction extending from the proximal end to the distal end of the light shielding portion 210, which can make the light shielding portion 210 have a larger extension length in the direction extending from the proximal end to the distal end of the light shielding portion 210, thereby improving the light shielding effect of the light shielding portion 210. Of course, the light emitting portion can also extend beyond the distal edge of the light shielding portion 210 in the direction extending from the proximal end to the distal end of the light shielding portion 210, and this application is not limited to this. It should be noted that Figure 6 Taking the viewing angle shown as an example, the distal edge of the light shielding portion 210 is the upper edge of the light shielding portion 210 , and the proximal edge of the light shielding portion 210 is the lower edge of the light shielding portion 210 .

[0039] In an optional embodiment, a camera module installation cavity is provided in the front end shell 400, and the front end assembly also includes a padding block 600 provided in the front end shell 400, the padding block 600 is located on one side of the camera module installation cavity, and the light source 500 is supported by the padding block 600. In this embodiment, the padding block 600 can be used to support the light source 500, so as to prevent the circuit board from being deformed under the weight of the light source 500; in addition, after the padding block 600 is provided, the light source 500 can be closer to the far end of the front end shell 400, which can make the light more evenly irradiate the inspection area, thereby improving the clarity and brightness of the field of view. Of course, the front end assembly may also not include the padding block 600. After the light source 500 is welded to the circuit board, glue can be injected into the front end shell 400, and the glue solidifies to form a colloid, and the light source 500 can be supported by the colloid.

[0040] In a further embodiment, when the present embodiment is combined with the embodiment of "the circuit board also includes a camera module mounting section 100", the raising block 600 can be carried on the board surface of the camera module mounting section 100 facing the camera module mounting cavity, so there is no need to additionally set up other supporting structures in the front end shell 400 to support the raising block 600.

[0041] Since the light source 500 generates a lot of heat, in order to better release the heat emitted by the light source 500, in an optional embodiment, refer to Figure 1 The circuit board includes two extension sections 200 arranged back to back, and a camera module installation cavity is formed between the two extension sections 200. Each extension section 200 includes a connecting portion 220, a bending portion 230 and a shading portion 210 connected in sequence. The bending portion 230 is located between the connecting portion 220 and the shading portion 210, and the bending portion 230 is inclined relative to the connecting portion 220. The connecting portion 220 is in contact with the padding block 600, and the light source 500 is in contact with the shading portion 210.

[0042] Optionally, the connecting portion 220 may be fitted with a side of the raising block 600 facing the camera module mounting cavity. In this case, the bending portion 230 may be bent relative to the connecting portion 220 in a direction close to the camera module mounting cavity so that the bending portion 230 is inclined relative to the connecting portion 220; the connecting portion 220 may also be fitted with a side of the raising block 600 facing away from the camera module mounting cavity. In this case, the bending portion 230 may be bent relative to the connecting portion 220 in a direction away from the camera module mounting cavity so that the bending portion 230 is inclined relative to the connecting portion 220.

[0043] The light source 500, the padding block 600 and the extension section 200 are surrounded together to form a filling space 810, and the filling space 810 is filled with a heat-distributing medium (not shown in the figure). In this embodiment, the connection part 220 is fitted with the padding block 600, so that the padding block 600 can be used to provide additional physical support for the connection part 220 to prevent the connection part 220 from bending or breaking during the assembly of the connection part 220; in addition, the light source 500, the padding block 600 and the extension section 200 are surrounded together to form a filling space 810, that is, a part of the light source 500 protrudes from the padding block 600 along the arrangement direction between the connection part 220 and the padding block 600, and the filling space 810 is located on the near side of the light source 500, so that part of the heat emitted by the light source 500 will directly enter the filling space 810, and then be guided to the near end of the front end assembly by the heat-distributing medium in the filling space 810 and the extension section 200, so as to prevent the heat emitted by the light source 500 from accumulating around itself and shortening its life. It should be noted that the filling space 810 can be formed by the light source 500, the padding block 600 and the bending portion 230; or, the filling space 810 can also be formed by the light source 500, the padding block 600, the bending portion 230 and the shading portion 210.

[0044] Optionally, the heat-saturating medium may be made of synthetic graphite material, thermally conductive gel, thermally conductive silicone grease, etc. The present application does not limit the specific material of the heat-saturating medium.

[0045] In an alternative embodiment, see Figures 3 to 6 The circuit board also includes a positioning section 240, which includes a first portion 241, a second portion 242 and a third portion 243 connected in sequence, the third portion 243 is located at the far side of the first portion 241 and is spaced apart from the first portion 241, the second portion is bent relative to the first portion 241 and the third portion 243 respectively, the first portion 241, the second portion 242 and the third portion 243 are surrounded to form a groove 244, the opening of the groove 244 faces the camera module installation cavity, a partial area of ​​the side surface of the pad block 600 is recessed inward to form a positioning groove 610, and the positioning section 240 is positioned in the positioning groove 610.

[0046] In this embodiment, the circuit board includes a positioning section 240, and the positioning section 240 is positioned and matched with the positioning groove 610 of the padding block 600. In this way, the padding block 600 can be used to position the circuit board so that the circuit board is located at a preset position, which can ensure the relative position between the light shielding portion 210 and the light source 500, thereby ensuring the light shielding effect of the light shielding portion 210 on the light source 500; in addition, after the positioning section 240 is positioned and matched with the positioning groove 610, the inner wall of the positioning groove 610 can be used to limit the positioning section 240, which can prevent the circuit board from shifting during the process of injecting glue into the front end shell 400. Of course, the circuit board may not include the positioning section 240, and this application is not limited to this.

[0047] It should be noted that when this embodiment is combined with the embodiment in which “the extension section 200 includes a connecting portion 220 , a bending portion 230 and a shading portion 210 connected in sequence”, a partial area of ​​the plate surface of the connecting portion 220 is recessed to form a positioning section 240 .

[0048] In an alternative embodiment, see Figure 3 and Figure 4 The two opposite plate surfaces of the first part 241 are respectively positioned and fitted with the two opposite inner walls of the positioning groove 610, the third part 243 is supported on the padding block 600, the shading part 210 is bent relative to the third part 243, and the electrical contact is arranged on the side of the third part 243 away from the padding block 600. The light source 500 has a pin located on the side facing the third part 243, and the pin is welded to the electrical contact.

[0049] In this embodiment, the positioning groove 610 extends from one side of the pad block 600 toward the camera module mounting cavity to the other side, the first part 241 is penetrated in the positioning groove 610 and is positioned and fitted with the two inner walls opposite to the positioning groove 610, the second part 242 extends along the pad block 600 to the distal surface of the pad block 600, the third part 243 is bent relative to the second part 242 to fit with the distal surface of the pad block 600, the shading part 210 is bent relative to the third part 243 in a direction away from the pad block 600, and a second space is formed between the shading part 210 and the third part 243, and the electrical contact is provided on the side of the third part 243 away from the pad block 600, so that the pins of the light source 500 facing the third part 243 can be directly welded to the electrical contacts, without adjusting the direction of the pins of the light source 500, thereby simplifying the structure of the light source 500.

[0050] In an alternative embodiment, see Figure 5 and Figure 6 The plate surface of the first part 241 facing away from the third part 243 and the plate surface of the third part 243 facing away from the first part 241 are respectively positioned and fitted with the two inner walls opposite to the positioning groove 610, and the electrical contact is provided on the side of the light shielding part 210 facing the second space, and the electrical contact is welded to the light source 500. Specifically, the positioning groove 610 can be a through groove, in which case the positioning groove 610 runs through from one side of the padding block 600 facing the camera module installation cavity to the other side; or the positioning groove 610 can also be a blind groove, in which case the positioning groove 610 is provided on the side of the padding block 600 facing the camera module installation cavity.

[0051] In this embodiment, the entire positioning section 240 is disposed in the positioning groove 610. Since the opening of the groove 244 formed inside the positioning section 240 itself faces the camera module installation cavity, the circuit board is located in the first part ( Figure 6 The portion of the circuit board located on the upper side of the positioning segment 240), and the second portion of the circuit board located near the positioning segment 240 ( Figure 6 The first part and the second part of the circuit board are both located in the camera module installation cavity, so that the first part and the second part can fit the camera module 910, thereby increasing the contact area between the circuit board and the camera module 910 to prevent the heat emitted by the camera module 910 from accumulating around itself. It should be noted that the first part and the second part of the circuit board are both part of the connecting portion 220 described above.

[0052] In an alternative embodiment, see Figure 7The circuit board includes a camera module mounting section 100 and an extension section 200, the extension section 200 intersects with the camera module mounting section 100, and one end of the extension section 200 away from the camera module mounting section 100 forms a shading portion 210, and the electrical contacts are arranged on the portion of the extension section 200 other than the shading portion 210, the light source 500 has a pin located on the side of itself facing the padding block 600, and the front-end component also includes a conductive member 700, and both ends of the conductive member 700 are respectively welded to the pin and the electrical contact.

[0053] In this embodiment, the electrical contacts are arranged on the portion of the extension section 200 other than the shading portion 210, and then the light source 500 is connected to the electrical contacts through a conductive member 700 such as a cable or a flexible circuit board. In this way, there is no need to set a wiring layer on the shading portion 210, which can simplify the manufacturing process of the circuit board; and, the pins of the light source 500 are connected to the electrical contacts through the conductive member 700, so there is no need to adjust the direction of the pins of the light source 500, which can simplify the structure of the light source 500.

[0054] It should be noted that this embodiment can be combined with the embodiment of "the light source 500, the raising block 600 and the extension section 200 together surround and form a filling space 810". When combined, the conductive member 700 is located in the filling space 810, so that the heat-averaging medium can disperse the heat generated by the conductive member 700, thereby improving the heat dissipation effect of the conductive member 700.

[0055] The present application also discloses an endoscope. Figure 8 , including the front-end assembly described in any of the above embodiments, so that the endoscope has the beneficial effects of the above-mentioned front-end assembly, which will not be described in detail in this application. The endoscope referred to in the embodiments of this application can be a bronchoscope, a pyeloscope, an esophagoscope, a gastroscope, a colonoscope, an otoscope, a rhinoscope, a stomatoscope, a laryngoscope, a colposcope, a laparoscope, an arthroscope, etc. The embodiments of this application do not specifically limit the type of endoscope.

[0056] The above embodiments of the present application focus on the differences between the various embodiments. As long as the different optimization features between the various embodiments are not contradictory, they can be combined to form a better embodiment. Considering the simplicity of the text, they will not be repeated here. The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the enlightenment of the present application, ordinary technicians in this field can also make many forms without departing from the scope of protection of the purpose of the present application and the claims, all of which are within the protection of the present application.

Claims

1. A circuit board, applied to the front end assembly of an endoscope, characterized in that: The circuit board is provided with an electrical contact for electrically connecting to a light source (500) of an endoscope, the circuit board has a light shielding portion (210), and two opposite sides of the light shielding portion (210) are respectively formed with a first space and a second space, the first space is used to accommodate a part of the camera module (910), and the second space is used to accommodate at least a part of the light emitting portion of the light source (500); The electrical contact is provided on a surface of the light shielding portion (210) facing the second space, and the electrical contact can be welded to a pin of the light source (500) located on the side thereof.

2. The circuit board according to claim 1, characterized in that: The circuit board comprises two extension sections (200) arranged in opposite directions, the distal ends of the extension sections (200) forming the light shielding portion (210), and a camera module installation cavity formed between two mutually facing board surfaces of the two extension sections (200), the camera module installation cavity comprising the first space.

3. A front end assembly of an endoscope, characterized in that: It comprises a front end shell (400), a light source (500) and a circuit board as claimed in any one of claims 1 to 2, wherein the light source (500) and the circuit board are both arranged in the front end shell (400), and at least part of the light emitting portion is arranged in the second space.

4. The front end assembly according to claim 3, characterized in that: The distal edge of the light shielding portion (210) extends beyond the light emitting portion in a direction extending from the proximal end to the distal end of the light shielding portion (210).

5. The front end assembly according to claim 3, characterized in that: A camera module installation cavity is provided in the front end shell (400), and the front end assembly further comprises a padding block (600) provided in the front end shell (400), the padding block (600) being located at one side of the camera module installation cavity, and the light source (500) being supported by the padding block (600).

6. The front end assembly according to claim 5, characterized in that The circuit board further comprises a positioning section (240), the positioning section (240) comprising a first portion (241), a second portion (242) and a third portion (243) connected in sequence, the third portion (243) being located at a distal side of the first portion (241) and spaced apart from the first portion (241), the second portion (242) being bent relative to the first portion (241) and the third portion (243), the first portion (241), the second portion (242) and the third portion (243) being surrounded to form a groove (244), the opening of the groove (244) facing the camera module installation cavity; A partial area of ​​the side surface of the raising block (600) is recessed inwards to form a positioning groove (610), and the positioning section (240) is positioned in the positioning groove (610).

7. The front end assembly according to claim 6, characterized in that: The two opposite plate surfaces of the first part (241) are respectively positioned and fitted with the two opposite inner walls of the positioning groove (610); the third part (243) is supported on the padding block (600); the shading part (210) is bent relative to the third part (243); the electrical contact is arranged on a side of the third part (243) away from the padding block (600); the light source (500) has a pin located on a side of the third part (243) facing the third part (243); and the pin is welded to the electrical contact.

8. The front end assembly according to claim 6, characterized in that: The plate surface of the first part (241) facing away from the third part (243) and the plate surface of the third part (243) facing away from the first part (241) are respectively positioned and fitted with two inner walls opposite to the positioning groove (610), and the electrical contact is provided on a side of the shading part (210) facing the second space, and the electrical contact is welded to the light source (500).

9. The front end assembly according to claim 5, characterized in that: The circuit board comprises a camera module mounting section (100) and an extension section (200), the extension section (200) intersecting with the camera module mounting section (100), an end of the extension section (200) facing away from the camera module mounting section (100) forming the light shielding portion (210), and the electrical contact point being provided at a portion of the extension section (200) other than the light shielding portion (210); The light source (500) has a pin located on a side of the light source facing the padding block (600), and the front-end component further comprises a conductive member (700), two ends of the conductive member (700) being respectively welded to the pin and the electrical contact.

10. An endoscope, characterized in that: Comprising a front end assembly as claimed in any one of claims 3 to 9.

Images