Fixed-focus camera module and electronic equipment

Abstract

The utility model discloses a fixed-focus camera module and electronic equipment. The fixed-focus camera module comprises a lens, a base, an optical filter, a circuit board, a photosensitive element and a connector, the lens comprises a lens seat and a lens group, the lens seat is provided with a light through hole, the lens group is arranged in the light through hole, and the lens seat comprises a first cylinder part, a second cylinder part and a third cylinder part; the base is connected with the third barrel part, and a light hole communicated with the light through hole is formed in the base; the light filter is connected with the base and covers the light hole; the circuit board is connected with the base, and the circuit board, the base and the optical filter define a closed space; the photosensitive element is electrically connected with the circuit board and located in the closed space, and the photosensitive element and the optical filter are oppositely arranged; one end of the connector is electrically connected with the circuit board, and the other end of the connector is electrically connected with an external device. According to the fixed-focus camera module, a thread locking structure is omitted, the size and the weight of the fixed-focus camera module are reduced, the fixed-focus camera module achieves the effects of being small in size and light in weight, and the electronic equipment is light and thin.

Description

Technical Field

[0001] The present application relates to the field of camera technology, and in particular to a fixed-focus camera module and electronic equipment. Background Art

[0002] With the continuous development of electronic products, people have put forward higher requirements for the thinness and lightness of electronic products. The lens holder and lens barrel of traditional camera modules are usually locked with a screw thread structure. However, since the lens barrel and lens holder are split structures, they need to be locked with a screw thread structure, which makes the camera module large in size and weight, which is not conducive to the realization of thinness and lightness of electronic products. Utility Model Content

[0003] In view of the above, it is necessary to propose a fixed-focus camera module and an electronic device, so that the fixed-focus camera module can achieve the effect of small size and light weight, thereby realizing the lightweight and thinness of the electronic device.

[0004] The present application provides a fixed-focus camera module, including:

[0005] A lens, wherein the lens comprises a lens holder and a lens group, the lens holder is provided with a light-through hole, the lens group is arranged in the light-through hole, the lens holder comprises a first barrel portion, a second barrel portion and a third barrel portion which are sequentially connected and coaxially arranged from the object side to the image side, and the light-through hole passes through the first barrel portion, the second barrel portion and the third barrel portion;

[0006] A base connected to a side of the third tube away from the second tube, the base being provided with a light-transmitting hole connected to the light-transmitting hole;

[0007] A filter, connected to the base and covering the light-transmitting hole;

[0008] A circuit board is connected to a side of the base away from the lens holder, wherein the circuit board, the base and the filter are enclosed to form a closed space;

[0009] A photosensitive element, electrically connected to the circuit board and located in the closed space, wherein the photosensitive element is arranged opposite to the filter;

[0010] A connector, one end of which is electrically connected to the circuit board, and the other end of which is used to be electrically connected to an external device.

[0011] In this way, the above-mentioned fixed-focus camera module, which is an integral structure of the lens holder formed by sequentially connecting the first barrel portion, the second barrel portion and the third barrel portion, the lens group is directly installed in the light hole of the lens holder, the base serves to support the lens, the filter serves to transmit light of a specific wavelength, the photosensitive element receives the light signal and converts it into an electrical signal, and realizes the transmission of the image or video signal through the circuit board and the connector. Compared with the traditional camera, the screw locking structure is eliminated, so that the structure of the fixed-focus camera module is more compact, and the volume and weight of the fixed-focus camera module are reduced, so that the fixed-focus camera module can achieve the effect of small volume and light weight, which is conducive to realizing the lightweight of electronic equipment.

[0012] In one embodiment, the area of ​​the cross section of the first barrel portion perpendicular to the optical axis is smaller than the area of ​​the cross section of the second barrel portion perpendicular to the optical axis, and the area of ​​the cross section of the second barrel portion perpendicular to the optical axis is smaller than the area of ​​the cross section of the third barrel portion perpendicular to the optical axis.

[0013] The fixed-focus camera module mentioned above limits the size relationship of the cross-sectional areas of the first barrel portion, the second barrel portion and the third barrel portion, so that the lens holder can be stably connected to the base and the volume and weight of the lens holder can be reduced.

[0014] In one embodiment, the area of ​​the cross section of the first barrel portion perpendicular to the optical axis gradually increases from a side far from the second barrel portion to a side close to the second barrel portion, the area of ​​the cross section of the second barrel portion perpendicular to the optical axis gradually increases from a side close to the first barrel portion to a side far from the first barrel portion, and the area of ​​the cross section of the third barrel portion perpendicular to the optical axis remains unchanged from a side close to the second barrel portion to a side far from the second barrel portion.

[0015] The fixed-focus camera module mentioned above limits the shapes of the first barrel, the second barrel and the third barrel. The first barrel and the second barrel are both roughly truncated cone-shaped, making it easy to assemble the lens holder with other components, thereby improving the versatility of the lens holder.

[0016] In one embodiment, the fixed-focus camera module also includes a protection unit, which includes a protection bracket and a light-transmitting sheet. The protection bracket is mounted on the first barrel and connected to a side of the second barrel close to the first barrel, and the light-transmitting sheet is connected to a side of the protection bracket away from the first barrel.

[0017] The above-mentioned fixed-focus camera module, by setting the above-mentioned protection unit and the specific structure of the protection unit, the protection bracket plays a protective role on the lens base. On the one hand, it can transmit light through the light-transmitting sheet, and on the other hand, it can cooperate with the protection bracket to prevent water, dust, etc. from entering the lens, thereby ensuring the stable use of the lens.

[0018] In one embodiment, a side of the first tube portion away from the second tube portion is provided with an annular arc surface which gradually shrinks from the side away from the second tube portion to the side close to the second tube portion and is connected to the hole wall of the light-through hole.

[0019] The fixed-focus camera module is provided with the annular curved surface, so that the lens group can obtain light in a wider range and improve the shooting angle of the lens.

[0020] In one of the embodiments, the base is provided with an embedded groove, the embedded groove is arranged around the light-transmitting hole, and the periphery of the filter is connected to the bottom of the embedded groove.

[0021] The above-mentioned fixed-focus camera module, by providing an embedded groove in the base, enables the filter to be embedded in the base, further reducing the height and weight of the fixed-focus camera module along the optical axis, thereby reducing the volume and weight of the fixed-focus camera module.

[0022] In one embodiment, the third barrel and the base, the base and the circuit board, and the filter and the base are all bonded by colloid, and the connector is bonded to the circuit board and the base respectively by the colloid.

[0023] The fixed-focus camera module mentioned above, by limiting the above-mentioned connection method, has a simple and efficient connection method, which is conducive to improving assembly efficiency.

[0024] In one embodiment, the colloid is solidified by AA glue.

[0025] The above-mentioned fixed-focus camera module is formed by curing the colloid by AA glue, and the lens is directly attached to the base by using the AA autofocus process, eliminating the focusing process, so that the fixed-focus camera module has better resolution, and can effectively reduce the appearance defects during the focusing process and improve the assembly yield.

[0026] In one embodiment, the connector includes a connecting member, a plug-in member and a plug-in terminal, one end of the connecting member is electrically connected to the circuit board, the other end of the connecting member is electrically connected to the plug-in member, and the plug-in terminal is electrically connected to the plug-in member.

[0027] The above-mentioned fixed-focus camera module, by setting the specific structure of the connector, enables the fixed-focus camera module to be connected to an external device such as an image processor, thereby transmitting the image or video signal captured by the fixed-focus camera module to the image processor; in addition, through the plug-in terminal, the connection method between the connector and the external device is simple and efficient, thereby improving the assembly efficiency.

[0028] An embodiment of the present application also provides an electronic device, comprising a fixed-focus camera module as described in any of the above technical solutions.

[0029] In the above-mentioned electronic device, in its fixed-focus camera module, the lens holder formed by sequentially connecting the first barrel portion, the second barrel portion and the third barrel portion is an integral structure, the lens group is directly installed in the light hole of the lens holder, the base serves to support the lens, the filter serves to transmit light of a specific wavelength, the photosensitive element receives the light signal and converts it into an electrical signal, and transmits the image or video signal through the circuit board and the connector. Compared with the traditional camera, the screw locking structure is eliminated, so that the structure of the fixed-focus camera module is more compact, and the volume and weight of the fixed-focus camera module are reduced, so that the fixed-focus camera module can achieve the effect of small volume and light weight, which is conducive to realizing the lightweight of electronic equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a structural schematic diagram of the fixed-focus camera module provided in an embodiment of the present application.

[0031] Figure 2 yes Figure 1 Schematic diagram of the exploded view of the fixed-focus camera module shown.

[0032] Figure 3 yes Figure 1 Another exploded schematic diagram of the fixed-focus camera module shown.

[0033] Figure 4 It is a schematic diagram of the structure of an electronic device provided in an embodiment of the present application.

[0034] Main component symbols

[0035] Electronic equipment 1

[0036] Fixed focus camera module 100

[0037] Shot 10

[0038] Mirror mount 11

[0039] Light hole 111

[0040] The first cylinder 112

[0041] Second cylinder portion 113

[0042] The third cylinder 114

[0043] Annular arc surface 115

[0044] Lens group 12

[0045] Base 20

[0046] Light hole 21

[0047] Built-in slot 22

[0048] Filter 30

[0049] Circuit board 40

[0050] Photosensitive element 50

[0051] Connector 60

[0052] Connector 61

[0053] Connector 62

[0054] Plug terminal 63

[0055] Protection unit 70

[0056] Protective bracket 71

[0057] Transparent sheet 72

[0058] First Colloid 81

[0059] Second colloid 82

[0060] The third colloid 83

[0061] Fourth Colloid 84

[0062] Anisotropic conductive adhesive 90

[0063] Optical axis 2 DETAILED DESCRIPTION

[0064] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0065] In the description of the present application, it should be understood that the terms indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present application, it should be noted that the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0066] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the term "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or mutual communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0067] Some embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0068] See also Figure 1 , Figure 2 and Figure 3 The embodiment of the present application provides a fixed-focus camera module 100, which has an object side and an image side. The object side can be understood as a side facing the photographed object, and the image side can be understood as a side away from the photographed object. The fixed-focus camera module 100 includes a lens 10, a base 20, a filter 30, a circuit board 40, a photosensitive element 50 and a connector 60.

[0069] The lens 10 includes a lens holder 11 and a lens group 12. The lens holder 11 is provided with a light-through hole 111 extending along the optical axis 2. The lens group 12 is arranged in the light-through hole 111. The lens holder 11 includes a first barrel 112, a second barrel 113 and a third barrel 114 which are sequentially connected and coaxially arranged from the object side to the image side. The light-through hole 111 passes through the first barrel 112, the second barrel 113 and the third barrel 114. The lens group 12 may include one or more lenses. The lens group 12 has a fixed focal length. The lens group 12 may be arranged in at least one of the first barrel 112, the second barrel 113 and the third barrel 114. The base 20 is connected to a side of the third barrel 114 of the lens holder 11 away from the second barrel 113. The base 20 is provided with a light-through hole 21 which is connected to the light-through hole 111. The base 20 is generally a hollow structure. The filter 30 is connected to the base 20 and covers the light-transmitting hole 21, that is, the light passing through the lens group 12 is incident on the filter 30. The circuit board 40 is connected to the side of the base 20 away from the lens holder 11, and the circuit board 40, the base 20 and the filter 30 are enclosed to form a closed space (not shown). The photosensitive element 50 is electrically connected to the circuit board 40 and is located in the closed space. The photosensitive element 50 is arranged opposite to the filter 30, that is, the light passing through the filter 30 is incident on the photosensitive element 50, and the photosensitive element 50 receives the light signal and converts it into an electrical signal. One end of the connector 60 is electrically connected to the circuit board 40, and the other end of the connector 60 is used to be electrically connected to an external device (not shown), such as an image processor, etc. The connector 60 and the circuit board 40 are used to transmit the electrical signal generated by the photosensitive element 50 to the external device.

[0070] Thus, the fixed-focus camera module 100 of the embodiment of the present application is formed by sequentially connecting the lens holder 11 of the lens 10 with the first barrel 112, the second barrel 113 and the third barrel 114, and the lens holder 11 is an integral structure. The lens group 12 is directly mounted in the light hole 111 of the lens holder 11. The lens holder 11 is directly connected to the base 20, and the base 20 plays the role of supporting the lens 10. The filter 30 is directly mounted on the base 20, and the filter 30 plays the role of transmitting light of a specific wavelength. The photosensitive element 50 receives the light signal and converts it into an electrical signal, and transmits the light signal to the optical circuit board 40 and the optical circuit board 40. The connector 60 realizes the transmission of image or video signals, and the closed space formed by the filter 30, the base 20 and the circuit board 40 effectively prevents water and dust from entering and contaminating the photosensitive element 50. Compared with the traditional camera, the fixed-focus camera module 100 of the embodiment of the present application cancels the screw locking structure, so that the structure of the fixed-focus camera module 100 is more compact, and the height, volume and weight of the fixed-focus camera module 100 along the optical axis 2 are reduced, so that the fixed-focus camera module 100 can achieve the effect of small size and light weight, which is conducive to realizing the lightweight of electronic equipment.

[0071] In this embodiment, the cross section of the first barrel portion 112 perpendicular to the optical axis 2 and the cross section of the second barrel portion 113 perpendicular to the optical axis 2 are both roughly annular, and the cross section of the third barrel portion 114 perpendicular to the optical axis 2 is roughly square annular, the area of ​​the cross section of the first barrel portion 112 perpendicular to the optical axis 2 is smaller than the area of ​​the cross section of the second barrel portion 113 perpendicular to the optical axis 2, and the area of ​​the cross section of the second barrel portion 113 perpendicular to the optical axis 2 is smaller than the area of ​​the cross section of the third barrel portion 114 perpendicular to the optical axis 2. It can be understood that the area of ​​the largest cross section among all cross sections of the first barrel portion 112 perpendicular to the optical axis 2 is still smaller than the area of ​​the smallest cross section among all cross sections of the second barrel portion 113 perpendicular to the optical axis 2, and the area of ​​the largest cross section among all cross sections of the second barrel portion 113 perpendicular to the optical axis 2 is still smaller than the area of ​​the smallest cross section among all cross sections of the third barrel portion 114 perpendicular to the optical axis 2. In this way, by limiting the size relationship of the cross-sectional areas of the first barrel portion 112, the second barrel portion 113 and the third barrel portion 114, the mirror holder 11 can achieve a stable connection with the base 20 through the third barrel portion 114 having a larger cross-sectional area, and the volume and weight of the mirror holder 11 can be reduced through the first barrel portion 112 and the second barrel portion 113 having a smaller cross-sectional area.

[0072] In this embodiment, the area of ​​the cross section of the first barrel 112 perpendicular to the optical axis 2 gradually increases from the side away from the second barrel 113 to the side close to the second barrel 113, and the first barrel 112 is roughly truncated cone-shaped, the area of ​​the cross section of the second barrel 113 perpendicular to the optical axis 2 gradually increases from the side close to the first barrel 112 to the side away from the first barrel 112, and the second barrel 113 is also roughly truncated cone-shaped, and the area of ​​the cross section of the third barrel 114 perpendicular to the optical axis 2 remains unchanged from the side close to the second barrel 113 to the side away from the second barrel 113, and the third barrel 114 is roughly quadrilateral column-shaped. In this way, by defining the shapes of the first barrel 112, the second barrel 113 and the third barrel 114, the first barrel 112 and the second barrel 113 are both roughly truncated cone-shaped, so that the lens holder 11 is easy to assemble with other components, thereby improving the versatility of the lens holder 11.

[0073] In this embodiment, the fixed-focus camera module 100 further includes a protection unit 70, which is connected to the lens holder 11 to protect the lens group 12. The protection unit 70 includes a protection bracket 71 and a light-transmitting sheet 72. The protection bracket 71 is roughly cylindrical, and the protection bracket 71 is sleeved on the first barrel 112 and connected to the side of the second barrel 113 close to the first barrel 112. The light-transmitting sheet 72 is connected to the side of the protection bracket 71 away from the first barrel 112. Among them, since the first barrel 112 is roughly truncated cone-shaped, the protection bracket 71 can, on the one hand, achieve close contact with the first barrel 112 through the larger cross section on the first barrel 112, and on the other hand, reduce the contact area between the protection bracket 71 and the first barrel 112 along the optical axis 2, so that the protection bracket 71 is easy to assemble with the lens holder 11. In this way, by providing the above-mentioned protection unit 70 and its specific structure, the protection bracket 71 protects the lens holder 11. On the one hand, the light can be transmitted through the light-transmitting sheet 72, and on the other hand, it can cooperate with the protection bracket 71 to prevent water, dust, etc. from entering the lens 10, thereby ensuring the stable use of the lens 10.

[0074] In this embodiment, a side of the first barrel portion 112 away from the second barrel portion 113 is provided with an annular arc surface 115 that gradually shrinks from the side away from the second barrel portion 113 to the side close to the second barrel portion 113 and is connected to the hole wall of the light-through hole 111. It can also be understood that the object side of the light-through hole 111 is roughly trumpet-shaped. In this way, by providing the above-mentioned annular arc surface 115 on the side of the first barrel portion 112 of the lens holder 11 away from the second barrel portion 113, the lens group 12 can obtain light in a wider range, thereby improving the shooting angle of the lens 10.

[0075] In this embodiment, an embedded groove 22 is provided on one side of the base 20 close to the lens holder 11, and the embedded groove 22 is arranged around the light-transmitting hole 21, and the periphery of the filter 30 is connected to the bottom of the embedded groove 22, wherein the embedded groove 22 is roughly in the shape of four petals. In this way, by providing the embedded groove 22 on one side of the base 20 close to the lens holder 11, the filter 30 can be embedded in the base 20, further reducing the height and weight of the fixed-focus camera module 100 along the optical axis 2, thereby reducing the volume and weight of the fixed-focus camera module 100. In addition, by setting the embedded groove 22 roughly in the shape of four petals, it is convenient to place the filter 30 in the embedded groove 22, thereby improving the assembly accuracy and efficiency of the fixed-focus camera module 100.

[0076] In this embodiment, the third barrel 114 of the lens holder 11 is bonded to the base 20 by the first colloid 81, the base 20 is bonded to the circuit board 40 by the second colloid 82, the filter 30 is bonded to the base 20 by the third colloid 83, and the connector 60 is bonded to the circuit board 40 and the base 20 by the fourth colloid 84, wherein the first colloid 81, the second colloid 82 and the third colloid 83 are all roughly annular, and the fourth colloid 84 is roughly triangular. In this way, by limiting the above connection method, the connection method of the fixed-focus camera module 100 is simple and efficient, which is conducive to improving assembly efficiency.

[0077] Furthermore, the first colloid 81, the second colloid 82, the third colloid 83 and the fourth colloid 84 can all be solidified by AA (Aron Alpha) glue. In this way, by limiting the colloid to be solidified by AA glue, the lens 10 is directly attached to the base 20 using the AA (Active Alignment) equipment automatic focusing process, eliminating the focusing process, so that the fixed-focus camera module 100 has better resolution, and can effectively reduce the appearance defects during the focusing process, and improve the assembly yield.

[0078] It can be understood that in other embodiments, the first colloid 81 , the second colloid 82 , the third colloid 83 and the fourth colloid 84 can also be cured by ultraviolet curing resin, thermosetting adhesive, light curing adhesive or self-drying adhesive.

[0079] In this embodiment, the photosensitive element 50 is connected to the circuit board 40 through a whole surface of anisotropic conductive adhesive 90. In this way, by limiting the connection method between the photosensitive element 50 and the circuit board 40, the connection method between the photosensitive element 50 and the circuit board 40 is simple, which is conducive to improving assembly efficiency, saving welding costs, and improving assembly yield.

[0080] In this embodiment, the connector 60 includes a connector 61, a plug connector 62 and a plug terminal 63. One end of the connector 61 is electrically connected to the circuit board 40 and connected to the circuit board 40 and the base 20 through the fourth colloid 84. The other end of the connector 61 is electrically connected to the plug connector 62. The plug terminal 63 is electrically connected to the plug connector 62. The connector 60 is plugged and connected to an external device through the plug terminal 63. In this way, by setting the specific structure of the connector 60, the fixed-focus camera module 100 is electrically connected to the external device, so that the image or video signal captured by the fixed-focus camera module 100 is transmitted to the external device; in addition, through the plug terminal 63, the connection method between the connector 60 and the external device is simple and efficient, thereby improving the assembly efficiency.

[0081] See also Figure 4 The embodiment of the present application further provides an electronic device 1, which includes the fixed-focus camera module 100 described in the above embodiment. In this embodiment, the electronic device 1 may be a mobile phone, and the fixed-focus camera module 100 may be a front camera of the electronic device 1. It can be understood that in other embodiments, the fixed-focus camera module 100 may be a rear camera of the electronic device 1.

[0082] It can be understood that in other embodiments, the electronic device 1 can also be a tablet computer, a laptop computer or other devices with a camera function, which is not specifically limited in the embodiments of the present application.

[0083] Thus, in the electronic device 1 of the embodiment of the present application, in the fixed-focus camera module 100, the lens holder 11 of the lens 10 is formed by sequentially connecting the first barrel 112, the second barrel 113 and the third barrel 114, and the lens holder 11 is an integral structure, the lens group 12 is directly mounted in the light hole 111 of the lens holder 11, the lens holder 11 is directly connected to the base 20, the base 20 plays the role of supporting the lens 10, the filter 30 is directly mounted on the base 20, the filter 30 plays the role of transmitting light of a specific wavelength, the photosensitive element 50 receives the light signal and converts it into an electrical signal, and transmits the light signal to the optical sensor 50 through the circuit board 40 and the optical filter 30. The connector 60 realizes the transmission of image or video signals, and the closed space formed by the filter 30, the base 20 and the circuit board 40 effectively prevents water and dust from entering and contaminating the photosensitive element 50. Compared with the traditional camera, the fixed-focus camera module 100 of the electronic device 1 of the embodiment of the present application cancels the screw locking structure, so that the structure of the fixed-focus camera module 100 is more compact, and the height, volume and weight of the fixed-focus camera module 100 along the optical axis 2 are reduced, so that the fixed-focus camera module 100 can achieve the effect of small size and light weight, which is conducive to realizing the lightweight of the electronic device 1.

[0084] It is obvious to those skilled in the art that the present application is not limited to the details of the exemplary embodiments described above, and that the present application can be implemented in other specific forms without departing from the spirit or essential features of the present application. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present application is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present application.

[0085] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present application and are not intended to limit it. Although the present application has been described in detail with reference to the preferred embodiments, a person of ordinary skill in the art should understand that the technical solution of the present application may be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the present application.

Claims

1. A fixed-focus camera module, characterized in that: include: A lens, wherein the lens comprises a lens holder and a lens group, the lens holder is provided with a light-through hole, the lens group is arranged in the light-through hole, the lens holder comprises a first barrel portion, a second barrel portion and a third barrel portion which are sequentially connected and coaxially arranged from the object side to the image side, and the light-through hole passes through the first barrel portion, the second barrel portion and the third barrel portion; A base connected to a side of the third tube away from the second tube, the base being provided with a light-transmitting hole connected to the light-transmitting hole; A filter, connected to the base and covering the light-transmitting hole; A circuit board is connected to a side of the base away from the lens holder, wherein the circuit board, the base and the filter are enclosed to form a closed space; A photosensitive element, electrically connected to the circuit board and located in the closed space, wherein the photosensitive element is arranged opposite to the filter; A connector, one end of which is electrically connected to the circuit board, and the other end of which is used to be electrically connected to an external device.

2. The fixed-focus camera module according to claim 1, wherein: The cross-sectional area of ​​the first barrel portion perpendicular to the optical axis is smaller than the cross-sectional area of ​​the second barrel portion perpendicular to the optical axis, and the cross-sectional area of ​​the second barrel portion perpendicular to the optical axis is smaller than the cross-sectional area of ​​the third barrel portion perpendicular to the optical axis.

3. The fixed-focus camera module according to claim 2, wherein: An area of ​​a cross section of the first barrel portion perpendicular to the optical axis gradually increases from a side away from the second barrel portion to a side close to the second barrel portion, an area of ​​a cross section of the second barrel portion perpendicular to the optical axis gradually increases from a side close to the first barrel portion to a side away from the first barrel portion, and an area of ​​a cross section of the third barrel portion perpendicular to the optical axis remains unchanged from a side close to the second barrel portion to a side away from the second barrel portion.

4. The fixed-focus camera module according to claim 1, wherein: The fixed-focus camera module also includes a protection unit, which includes a protection bracket and a light-transmitting sheet. The protection bracket is mounted on the first barrel and connected to a side of the second barrel close to the first barrel, and the light-transmitting sheet is connected to a side of the protection bracket away from the first barrel.

5. The fixed-focus camera module according to claim 1, wherein: A side of the first barrel portion away from the second barrel portion is provided with an annular arc surface which gradually contracts from the side away from the second barrel portion to the side close to the second barrel portion and is connected to the hole wall of the light-through hole.

6. The fixed-focus camera module according to claim 1, wherein: The base is provided with an embedded groove, the embedded groove is arranged around the light-transmitting hole, and the periphery of the filter is connected to the bottom of the embedded groove.

7. The fixed-focus camera module according to claim 1, wherein: The third barrel and the base, the base and the circuit board, and the filter and the base are all bonded by colloid, and the connector is bonded to the circuit board and the base respectively by the colloid.

8. The fixed-focus camera module according to claim 7, wherein: The colloid is solidified by AA glue.

9. The fixed-focus camera module according to claim 1, wherein: The connector comprises a connecting piece, a plug-in piece and a plug-in terminal. One end of the connecting piece is electrically connected to the circuit board, the other end of the connecting piece is electrically connected to the plug-in piece, and the plug-in terminal is electrically connected to the plug-in piece.

10. An electronic device, characterized in that: Comprising a fixed-focus camera module as described in any one of claims 1 to 9.

Images