Camera module

Abstract

The utility model discloses a camera module which comprises a shell, an imaging unit is arranged in the shell, one end of the shell is connected with a cable, the other end of the shell is connected with an end cover, the imaging unit is electrically connected with a wire harness of the cable, and a shielding layer extending in the axial direction and the circumferential direction of the cable is further arranged in the cable. The inner wall and / or the outer wall of the shell are / is provided with a shielding coating, and the end cover, the shielding coating and the shielding layer are electrically connected, so that interference signals on the shell and the end cover are transmitted to the cable.

Description

Technical Field

[0001] This utility model belongs to the field of endoscope technology, specifically relating to a camera module. Background Technology

[0002] The endoscope is equipped with a camera module that can acquire image information of the patient's lesion, facilitating observation and treatment by medical staff. Because various instruments and equipment are placed in the operating room, external interference signals can be generated. To prevent these interference signals from affecting the camera module, existing camera modules have a metal bracket inside the housing. This metal bracket transmits the external interference signals to a cable, which then transmits them out. However, this metal bracket, located inside the housing to shield the signal, occupies part of the housing's space, hindering the layout of the imaging unit and increasing the housing's size, thus reducing the device's weight. Therefore, it is necessary to improve the existing technology to overcome these shortcomings. Utility Model Content

[0003] Therefore, the technical problem to be solved by this utility model is to provide a camera module with a lightweight structure and good shielding effect.

[0004] To solve the above-mentioned technical problems, this utility model provides a camera module, including a housing, an imaging unit disposed inside the housing, a cable connected to one end of the housing and an end cap connected to the other end, the imaging unit being electrically connected to the cable harness, a shielding layer extending along its axial and circumferential directions being disposed inside the cable, a shielding coating being disposed on the inner wall and / or outer wall of the housing, and the end cap, the shielding coating and the shielding layer being electrically connected to transmit interference signals on the housing and the end cap to the cable.

[0005] Preferably, the housing is hollow inside to form a receiving cavity for accommodating the imaging unit, and the cavity wall of the receiving cavity is provided with the shielding coating, wherein the shielding coating is provided on the entire cavity wall of the receiving cavity, and the shielding coating is conductive paint.

[0006] Preferably, the end cap is made of a metal material, and the shielding coating inside the housing extends to the surface that mates with the end cap, so that the shielding coating forms an electrical connection with the end cap; or,

[0007] The end cap is made of insulating material, and the inner wall of the end cap is coated with the shielding coating. The shielding coating on the end cap is in contact with the shielding coating on the housing.

[0008] Preferably, one end of the housing is provided with a first metal fitting, which connects the shielding layer and the shielding coating.

[0009] Preferably, a protective sleeve unit is provided at one end of the cable near the housing, and the cable is connected to the first metal kit through the protective sleeve unit;

[0010] The protective sleeve unit is also configured to form a strength transition zone between the cable and the first metal kit.

[0011] Preferably, the protective sleeve unit is threadedly connected to the first metal kit.

[0012] Preferably, the protective sleeve unit includes a flexible main sleeve and a second metal component, wherein the second metal component is disposed at the end of the flexible main sleeve near the housing side and is connected to the first metal component;

[0013] The flexible main sleeve is connected to the cable at the end away from the housing side. The shielding layer of the cable is connected to the second metal kit. The material of the flexible main sleeve is the same as the material of the outer sleeve of the cable, and the hardness of the material of the flexible main sleeve is greater than the hardness of the material of the outer sleeve of the cable.

[0014] Preferably, the protective sleeve unit further includes a third metal sleeve fitted around the outer periphery of the second metal sleeve. A first limiting protrusion is provided around the outer circumference of the end of the flexible main sleeve that is connected to the second metal sleeve. The end of the third metal sleeve away from the housing abuts against the first limiting protrusion. The first limiting protrusion is located inside the third metal sleeve.

[0015] The third metal kit has an internal thread on its inner wall near the end of the housing, the first metal kit has an external thread that mates with the internal thread on its outer wall, and the second metal kit has a third limiting protrusion on its outer peripheral wall that abuts against the end of the first metal kit.

[0016] Preferably, the second metal kit has a first section located within the flexible main body, and the cable's shielding layer is connected to the first section;

[0017] The shielding layer extends at least to the axial position of the end of the third metal assembly away from the housing near the end of the housing.

[0018] Preferably, the inner wall of the second metal kit is provided with a pair of axially extending slots for engaging the adapter plate, the slots having openings facing the housing.

[0019] The technical solution provided by this utility model has the following advantages:

[0020] In this utility model, the shielding coating can surround the imaging unit inside the housing to prevent the imaging unit from being affected by external electromagnetic fields and interference signals; moreover, the shielding coating does not occupy the internal space of the housing and will not affect the arrangement and installation of the imaging unit, making the housing structure more compact; in addition, it is conducive to the lightweight design of the camera module and reduces user fatigue. Attached Figure Description

[0021] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0022] Figure 1 A three-dimensional structural diagram of the camera module provided by this utility model from a first-view perspective;

[0023] Figure 2 A three-dimensional structural diagram of the camera module provided by this utility model from a second perspective;

[0024] Figure 3 This is an exploded view of the camera module.

[0025] Figure 4 This is a cross-sectional structural diagram of the camera module;

[0026] Figure 5 This is a schematic diagram of the cross-sectional structure of the shell;

[0027] Figure 6 This is a schematic diagram of the cross-sectional structure of the cable;

[0028] Figure 7 A schematic diagram of the cross-sectional structure of the flexible main sleeve and the second metal assembly;

[0029] Figure 8 A three-dimensional structural diagram of the flexible main sleeve and the second metal assembly;

[0030] Figure 9 A schematic diagram of the cross-sectional structure of the flexible main sleeve;

[0031] Figure 10 This is a structural diagram of the metal kit;

[0032] Figure 11 for Figure 4 Enlarged structural diagram of region A in the middle;

[0033] Figure 12 This is a schematic diagram of the decorative ring. Detailed Implementation

[0034] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. The present utility model will be described in detail below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this utility model can be combined with each other.

[0035] It should be noted that the terms "first," "second," etc., in the specification, claims, and drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0036] In this utility model, unless otherwise stated, directional terms such as "upper," "lower," "top," and "bottom" are generally used in relation to the direction shown in the accompanying drawings, or in relation to the vertical, perpendicular, or gravitational direction of the component itself; similarly, for ease of understanding and description, "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not used to limit this utility model.

[0037] This invention provides a camera module. In one application scenario, the camera module is used in an endoscopic device to acquire image information of the patient's lesion, thereby facilitating medical personnel to observe and treat the lesion. Of course, the application scenarios of this camera module include, but are not limited to, endoscopic devices, and can also be applied to other medical devices.

[0038] like Figures 1 to 5 As shown, the camera module includes a housing 100, an imaging unit 200, an end cap 400, and a cable 300. The housing 100 is hollow inside and open at both ends to form a receiving cavity 110, which is used to house the imaging unit 200. The housing 100 has a first port 120 and a second port 130, which are located at opposite ends of the housing 100 and are respectively connected to the receiving cavity 110. The first port 120 of the housing 100 is connected to the cable 300, and the second port 130 is connected to the end cap 400.

[0039] The housing 100 also includes a button assembly 600, which is exposed on the outer wall of the housing 100. The button assembly 600 allows switching the operating state of the imaging unit 200. The housing 100 is made of plastic. To reduce the impact of external instruments on the camera module, especially the interference signals generated by external instruments on the imaging unit 200, a shielding coating (not shown) is applied to the inner and / or outer walls of the housing 100. The shielding coating surrounds the imaging unit 200 within the housing 100, preventing it from being affected by external electromagnetic fields and interference signals. Furthermore, the shielding coating does not occupy internal space within the housing 100 and does not affect the arrangement or installation of the imaging unit 200, resulting in a more compact structure. In addition, it contributes to the lightweight design of the camera module, reducing user fatigue.

[0040] The shielding coating is preferably a conductive paint, which is applied to the wall of the housing 100. After the conductive paint forms a film, it conducts electricity, thereby shielding electromagnetic interference (interference signals). When the shielding coating is applied inside the housing 100, it is applied to the cavity wall of the receiving cavity 110. Preferably, the shielding coating is sprayed onto the entire cavity wall of the receiving cavity, thus comprehensively shielding external interference signals. When the shielding coating is applied to the outside of the housing 100, it is sprayed onto the entire outer wall of the housing 100. Considering that the camera module is an instrument used in the operating room, it needs to be immersed in a medicinal liquid for disinfection and sterilization after surgery. To avoid the shielding coating reacting with the medicinal liquid, it is preferable to coat the outer shell of the shielding coating with an insulating protective layer. This achieves the shielding function while also solving the postoperative disinfection problem. For ease of description, the following description uses the example of the shielding coating being sprayed onto the cavity wall of the receiving cavity 110. However, based on the above description, the scope of protection of this utility model is not limited thereto.

[0041] To ensure the camera module can effectively shield against interference signals, the end cap 400 also needs to have signal shielding capabilities. Preferably, the end cap 400 is made of metal, and the shielding coating within the housing 100 extends to the surface that mates with the end cap 400, thus creating an electrical connection between the shielding coating and the end cap 400. Figure 5 As shown, the aforementioned "surface that mates with end cap 400" includes the end face H of housing 100 and the inner area of ​​receiving cavity 110 near end face H. The aforementioned "surface that mates with end cap 400" abuts and mates with end cap 400. After end cap 400 comes into contact with shielding coating, an electrical connection is formed between shielding coating and end cap 400. Interference signals on end cap 400 can be transmitted to shielding coating and then to cable 300 through shielding coating.

[0042] Of course, the end cap 400 can also be made of insulating material. When the end cap 400 is made of insulating material, a shielding coating is provided on the inner wall of the end cap 400. The shielding coating on the end cap 400 is in contact with the shielding coating on the housing 100. Thus, interference signals on the end cap 400 can also be transmitted to the cable 300.

[0043] like Figure 6 As shown, the cable 300 includes at least a wire harness 310 and a shielding layer 320. The shielding layer 320 extends along the axial and circumferential directions of the cable 300 to fully enclose the wire harness 310. The shielding layer 320 is generally a braided copper mesh or copper foil. An external control unit (not shown) is connected to the end of the cable 300 away from the housing 100. The wire harness 310 of the cable 300 connects the imaging unit 200 to the external control unit to realize the transmission of working signals between the imaging unit 200 and the external control unit. The cable 300 may also include an outer sleeve 330, which is fitted around the outer periphery of the shielding layer 320 to protect the wire harness 310 and the shielding layer 320. Understandably, the shielding layer 320 and the outer sleeve 330 can also be combined into one layer, providing both shielding against interference signals and physical protection. It should be noted that, unless otherwise specified, "axial" and "circumferential" in this specification refer to the axial and circumferential directions of the cable 300.

[0044] The end cap 400, the shielding coating, and the shielding layer 320 are electrically connected. Interference signals on the housing 100 and the end cap 400 are transmitted to the shielding layer 320 of the cable 300 through the shielding coating, and then the interference signals are guided to the ground through the shielding layer 320, thereby preventing interference signals from entering the housing 100 and the cable 300 and affecting normal operation signals.

[0045] To transmit interference signals from the housing 100 and end cap 400 to the shielding layer 320. For example... Figure 5 As shown, the first port 120 of the housing 100 is provided with a first metal fitting 140, which abuts against the shielding coating and connects the shielding layer 320 and the shielding coating through the first metal fitting 140.

[0046] Specifically, the first metal component 140 is fixed at the first port 120 and partially located on the outside of the housing 100 to facilitate connection with the shielding layer 320. The housing 100 and the first metal component 140 are integrally injection molded, thereby firmly bonding the plastic housing 100 and the first metal component 140 together, effectively preventing the housing 100 and the first metal component 140 from loosening, ensuring a stable and reliable connection.

[0047] like Figure 2 and Figure 3As shown, a protective sleeve unit 500 is provided at one end of the cable 300 near the housing 100, and the cable 300 is connected to the first metal assembly 140 through the protective sleeve unit 500. The aforementioned "connection between the cable 300 and the first metal assembly 140" includes two types of connections: one is a structural connection, and the other is an electrical connection. The structural connection refers to the mechanical connection (e.g., snap-fit ​​connection, fastening connection) between the cable 300 and the first metal assembly 140; the electrical connection refers to the connection between the shielding layer 320 of the cable 300 and the first metal assembly 140.

[0048] like Figure 7 and Figure 8 As shown, the protective sleeve unit 500 includes a flexible main sleeve 510 and a second metal component 520. The flexible main sleeve 510 and the second metal component 520 can be integrally injection molded to achieve the connection between them. Alternatively, after the second metal component 520 is inserted into the flexible main sleeve 510, the two can be fixed together using adhesive.

[0049] The flexible main sleeve 510 is tubular and made of rubber or silicone. A second metal assembly 520 is located at the end of the flexible main sleeve 510 near the housing 100 and is connected to the first metal assembly 140. Both the first metal assembly 140 and the second metal assembly 520 are sleeve-shaped. The second metal assembly 520 includes a first section located inside the flexible main sleeve 510 and a second section extending to the outside of the flexible main sleeve 510; the first metal assembly 140 is connected to the second section.

[0050] A cable 300 is connected to the end of the flexible main sleeve 510 away from the housing 100. Specifically, one end of the cable 300 is inserted into the cavity 511 of the flexible main sleeve 510. After entering the cavity 511, the shielding layer 320 of the cable 300 is connected to the first section of the second metal assembly 520, thereby connecting the shielding layer 320 to the first metal assembly 140. During installation, the outer sleeve 330 of one end of the cable 300 is first stripped to expose the shielding layer 320 of the cable 300, and then the exposed shielding layer 320 is connected to the second metal assembly 520.

[0051] like Figure 9As shown, a stepped portion 512 is formed on the cavity wall of the tube 511, which defines the axial position of the first section within the tube 511. The stepped portion 512 gives the tube 511 a large-diameter section and a small-diameter section, with the first section housed in the large-diameter section. A guide surface 513 is formed on the inner wall of the opening of the large-diameter section away from the cable 300. The guide surface 513 is a conical surface, and its aperture gradually decreases along the direction from the second metal fitting 520 to the flexible main sleeve 510. During the insertion of the first section of the second metal fitting 520 into the flexible main sleeve 510, there is good alignment between the second metal fitting 520 and the flexible main sleeve 510, improving installation accuracy and efficiency.

[0052] Furthermore, such as Figure 7 As shown, the outer wall of the second metal kit 520 is provided with a second limiting protrusion 521. The second limiting protrusion 521 abuts against the end of the flexible main sleeve 510 near the housing 100 and is used to limit the relative position of the second metal kit 520 and the flexible main sleeve 510 in the axial direction.

[0053] like Figure 8 As shown, a pair of symmetrical protrusions 530 are provided on the inner circumferential wall of the second section of the second metal assembly 520, with the two protrusions 530 spaced 180° apart. Each protrusion 530 has an axially extending slot 531, which is used to hold the adapter plate 540. The slot 531 has a notch facing the housing 100, and the adapter plate 540 is inserted into the slot 531 through the notch, thereby realizing the installation of the adapter plate 540. After entering the flexible main sleeve 510, the wire harness 310 of the cable 300 extends into the second metal assembly 520 and connects with the adapter plate 540.

[0054] like Figure 4 and Figure 10 As shown, the protective sleeve unit 500 also includes a third metal sleeve 550 fitted around the outer periphery of the second metal sleeve 520. A first limiting protrusion 514 is provided circumferentially on the outer circumferential surface of the end of the flexible main sleeve 510 connected to the second metal sleeve 520. The end of the third metal sleeve 550 away from the housing 100 abuts against the first limiting protrusion 514, which is located within the third metal sleeve 550. The shielding layer 320 extends at least to the axial position of the end of the third metal sleeve 550 away from the housing 100, thus providing better signal shielding in the entire axial direction.

[0055] The third metal assembly 550 has an internal thread 551 on its inner wall near the end of the housing 100, and the first metal assembly 140 has an external thread 141 on its outer wall that mates with the internal thread 551, thereby achieving a threaded connection between the protective sleeve unit 500 and the first metal assembly 140. Figure 4 and Figure 5 As shown, after the internal thread 551 and the external thread 141 are screwed together, the third metal fitting 550 abuts against the end face I of the first port 120 of the housing 100. Preferably, the end face I of the first port 120 is also provided with a shielding coating, so that interference signals on the housing 100 can also be conducted to the third metal fitting 550, and then through the third metal fitting 550 to the first metal fitting 140, the second metal fitting 520, and finally to the shielding layer 320. Figure 11 As shown, the outer peripheral wall of the second metal kit 520 is provided with a third limiting protrusion 522 that abuts against the end of the first metal kit 140, thereby ensuring effective contact between the second metal kit 520 and the first metal kit 140.

[0056] Furthermore, the protective sleeve unit 500 is also configured to form a strength transition zone between the cable 300 and the first metal assembly 140. The flexible main sleeve 510 is made of the same material as the outer sleeve 330 of the cable 300, and the material hardness of the flexible main sleeve 510 is greater than that of the outer sleeve of the cable 300. This forms a material strength transition zone, preventing the cable 300, which has lower hardness, from directly connecting with the first metal assembly 140. A large difference in material strength could easily cause the cable 300 to break off from the first metal assembly 140.

[0057] like Figure 4 , Figure 10 and Figure 12 As shown, a decorative ring 560 is also fitted onto the end of the third metal component 550 near the housing 100. The decorative ring 560 includes a ring body 561 fitted onto the outer periphery of the end of the third metal component 550 near the housing 100. A rib ring 562 is radially protruding from the inner ring of the ring body 561 away from the housing 100. A groove 552 is radially recessed on the outer peripheral surface of the third metal component 550. A first anti-rotation surface 553 parallel to the axial direction of the third metal component 550 is provided on the outer peripheral surface of the end of the third metal component 550 near the housing 100. A second anti-rotation surface 563 abutting against the first anti-rotation surface 553 is provided on the inner ring of the ring body 561. Both the first anti-rotation surface 553 and the second anti-rotation surface 563 are straight planes.

[0058] Obviously, the embodiments described above are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, those skilled in the art can make other variations or modifications without creative effort, and all such variations or modifications should fall within the protection scope of this utility model.

Claims

1. A camera module, comprising a shell (100), an imaging unit (200) is arranged in the shell (100), one end of the shell (100) is connected with a cable (300), the other end is connected with an end cover (400), the imaging unit (200) is electrically connected with a wire harness (310) of the cable (300), a shielding layer (320) extending along the axial and circumferential direction of the cable (300) is further arranged in the cable (300), characterized in that, The inner wall and / or the outer wall of the shell (100) is provided with a shielding paint, and the end cover (400), the shielding paint and the shielding layer (320) are electrically connected to transmit the interference signals on the shell (100) and the end cover (400) to the cable (300).

2. The camera module of claim 1, wherein, The shell (100) is internally hollow to form a receiving cavity for accommodating the imaging unit (200), and the cavity wall of the receiving cavity is provided with the shielding paint, wherein the shielding paint is provided on the entire cavity wall of the receiving cavity, and the shielding paint is conductive paint.

3. The camera module of claim 2, wherein the lens is disposed on the substrate. The end cover (400) is made of metal material, and the shielding paint in the shell (100) extends to the surface body matched with the end cover (400) to form electrical connection between the shielding paint and the end cover (400); or, The end cover (400) is made of insulating material, and the inner wall of the end cover (400) is provided with the shielding paint, and the shielding paint on the end cover (400) is in contact with the shielding paint on the shell (100).

4. The camera module of claim 1, wherein the lens module is configured to focus light onto the image sensor. One end of the shell (100) is provided with a first metal sleeve (140), and the first metal sleeve (140) connects the shielding layer (320) and the shielding paint.

5. The camera module of claim 4, wherein, The cable (300) is provided with a protective sleeve unit (500) near one end of the shell (100), and the cable (300) is connected with the first metal sleeve (140) through the protective sleeve unit (500). The protective sleeve unit (500) is further configured to form a strength transition zone between the cable (300) and the first metal sleeve (140).

6. The camera module of claim 5, wherein, The protective sleeve unit (500) is threadedly connected with the first metal sleeve (140).

7. The camera module of claim 5, wherein the lens barrel is configured to move the lens assembly along the optical axis. The protective sleeve unit (500) includes a flexible main sleeve body (510) and a second metal sleeve (520), and the second metal sleeve (520) is arranged at the end of the flexible main sleeve body (510) close to the shell (100) and connected with the first metal sleeve (140). The end of the flexible main sleeve body (510) away from the shell (100) is connected with the cable (300), and the shielding layer (320) of the cable (300) is connected with the second metal sleeve (520), wherein the material of the flexible main sleeve body (510) is the same as the material of the outer layer sleeve of the cable (300), and the material hardness of the flexible main sleeve body (510) is greater than the material hardness of the outer layer sleeve of the cable (300).

8. The camera module of claim 7, wherein, The protective sleeve unit (500) further comprises a third metal sleeve (550) sleeved on the outer periphery of the second metal sleeve (520), an outer circumferential surface of an end of the flexible main sleeve body (510) connected with the second metal sleeve (520) is circumferentially annularly provided with a first limiting protrusion (514), and an end of the third metal sleeve (550) away from the shell (100) is abuttingly matched with the first limiting protrusion (514), and the first limiting protrusion (514) is located in the third metal sleeve (550); An inner thread (551) is arranged on an inner wall of an end of the third metal sleeve (550) close to the shell (100), an outer wall of the first metal sleeve (140) is provided with an outer thread matched with the inner thread, and an outer peripheral wall of the second metal sleeve (520) is provided with a third limiting protrusion (522) abutting against an end of the first metal sleeve (140).

9. The camera module of claim 8, wherein, The second metal sleeve (520) has a first section located in the flexible main sleeve body (510), and a shielding layer (320) of the cable (300) is connected with the first section; The shielding layer (320) extends at least to an axial position of an end of the third metal sleeve (550) away from the shell (100).

10. The camera module of claim 8, wherein, An inner wall of the second metal sleeve (520) is provided with a pair of insertion grooves (531) extending in an axial direction for clamping an adapter plate (540), and the insertion grooves (531) have a slot opening towards the shell (100).

Images