Machine vision equipment and lens cover and lens module thereof

Abstract

A machine vision device disclosed by the present application comprises an industrial camera and a lens module, the industrial camera comprises a main body shell, a photosensitive circuit board assembly and a mainboard assembly, a photosensitive through hole is formed in the main body shell, the photosensitive circuit board assembly and the mainboard assembly are both arranged in the main body shell, and a photosensitive surface of the photosensitive circuit board assembly faces the photosensitive through hole. The lens module comprises a lens cover, a light source assembly and a lens assembly. The machine vision device further comprises a dual-drive cable. The lens cover comprises a lens cover shell, and a first light hole and a second light hole are formed in the lens cover shell; the rear end of the lens cover shell is hermetically connected with the front end of the main body shell, and the second light hole is aligned with the photosensitive through hole; a first cable through hole is further formed in the lens cover shell, one end of the dual-drive cable penetrates through the first cable through hole and is electrically connected with the light source assembly and the lens assembly, and the other end of the dual-drive cable is electrically connected with the mainboard assembly. The invention also provides a lens module and a lens cover.

Description

Technical Field

[0001] The present invention relates to the field of machine vision devices, and in particular, to a machine vision device, a lens hood of the machine vision device, and a lens module of the machine vision device. Background Art

[0002] An industrial camera is a common machine vision device, and an industrial camera can be used to detect a workpiece to determine whether the workpiece is qualified.

[0003] An industrial camera includes a camera body and a lens assembly. Light reflected by an external object passes through the lens assembly and then reaches a photosensitive sensor in the camera body, and imaging is achieved through the photosensitive sensor. How to improve the clarity of the image generated by the industrial camera has been pursued in this field. Summary of the Invention

[0004] The present invention aims to solve one of the technical problems in the related art to a certain extent. For this purpose, the present invention provides a machine vision device, a lens hood of the machine vision device, and a lens module of the machine vision device.

[0005] To achieve the above object, as a first aspect of the present invention, there is provided a machine vision device. The machine vision device includes an industrial camera and a lens module. The industrial camera includes a main body housing, a photosensitive circuit board assembly, and a main board assembly. A photosensitive through hole is formed in the main body housing. The photosensitive circuit board assembly and the main board assembly are both disposed in the main body housing, and the photosensitive surface of the photosensitive circuit board assembly faces the photosensitive through hole. The main board assembly is used to drive the photosensitive circuit board assembly. The lens module includes a lens hood, a light source component, and a lens component. The machine vision device further includes a dual-drive cable;

[0006] The lens hood includes a lens hood housing. A first light-transmitting hole and a second light-transmitting hole are formed in the lens hood housing. The light source component and the lens component are both disposed in the accommodation space defined by the lens hood housing, and the light source component is disposed around the lens component. The lens component is used to guide the light incident through the first light-transmitting hole to the second light-transmitting hole;

[0007] The rear end of the lens hood housing is hermetically connected to the front end of the main body housing, and the second light-transmitting hole is aligned with the photosensitive through hole;

[0008] A first cable through hole is further formed in the lens hood housing. One end of the dual-drive cable passes through the first cable through hole and is electrically connected to the light source component and the lens component respectively. The other end of the dual-drive cable is electrically connected to the main board assembly to control the light source component and the lens component respectively through the main board assembly.

[0009] Optionally, the lens hood further includes a cable installation interface member, a second cable through-hole is formed on the cable installation interface member, the cable installation interface member is arranged at the rear end of the lens hood housing, the first cable through-hole is aligned and communicated with the second cable through-hole, and the double-drive cable passes through the second cable through-hole and enters the first cable through-hole.

[0010] Optionally, a plurality of first clamping blocks are formed at the rear end of the second cable through-hole, and the plurality of first clamping blocks are spaced apart along the circumferential direction of the second cable through-hole, and the first clamping blocks protrude towards the axis of the second cable through-hole;

[0011] The double-drive cable includes a light source drive cable, a lens drive cable, a cable housing and a cable protection member. The light source drive cable and the lens drive cable are both arranged in the cable housing. The cable protection member is located at one end of the cable housing, and a third cable through-hole is formed on the cable protection member. The light source drive cable and the lens drive cable both pass through the third cable through-hole, and enter the lens hood housing through the second cable through-hole and the first cable through-hole.

[0012] The cable protection member includes an insertion part, a protection member body and a plurality of second clamping blocks. The insertion part is arranged on the front end face of the protection member body. The third cable through-hole penetrates through the insertion part and the protection member body. The plurality of second clamping blocks are arranged on the outer circumferential surface of the insertion part and surround the insertion part;

[0013] The maximum dimension of the second clamping block along the circumferential direction of the insertion part is smaller than the dimension of the interval between two adjacent first clamping blocks along the circumferential direction of the first cable through-hole;

[0014] The second cable through-hole is aligned with the third cable through-hole. The second clamping block can be inserted into the first cable through-hole through the interval between two adjacent first clamping blocks and rotated to a position overlapping with the corresponding first clamping block.

[0015] Optionally, sealant is filled between the inner wall of the first cable through-hole and the double-drive cable.

[0016] Optionally, a third sealing ring is arranged between the rear end of the lens hood housing and the front end of the main body housing.

[0017] As a second aspect of the present application, a lens hood is provided, which includes a lens hood shell, wherein a accommodating space is defined in the lens hood shell, and a first light-transmitting hole and a second light-transmitting hole are formed on the lens hood shell, wherein the accommodating space is used to accommodate a light source assembly and a lens assembly, and the lens hood shell is also formed with a first cable through-hole for routing dual drive cables, one end of the dual drive cable is used to be electrically connected to the light source assembly and the lens assembly, respectively, and the other end of the dual drive cable is used to be electrically connected to a mainboard assembly of an industrial camera, so as to control the light source assembly and the lens assembly respectively through the mainboard assembly.

[0018] Optionally, the lens hood also includes a cable mounting interface component, a second cable through hole is formed on the cable mounting interface component, the cable mounting interface component is arranged at the rear end of the lens hood shell, the first cable through hole is aligned with and connected to the second cable through hole, and the dual drive cable can pass through the second cable through hole into the first cable through hole.

[0019] Optionally, a plurality of first clamping blocks are formed at the rear end of the second cable through hole, the plurality of first clamping blocks are distributed at intervals along the circumference of the first cable through hole, and the first clamping blocks protrude toward the axis of the second cable through hole.

[0020] Optionally, the lens cover further includes a light source support frame, the light source support frame is arranged in the accommodating space, and divides the accommodating space into a light source accommodating space and a lens accommodating space, the light source accommodating space and the first light transmission hole are located on one side of the light source support frame, the lens accommodating space and the second light transmission hole are located on the other side of the light source support frame, and the lens accommodating space is used to accommodate the lens assembly;

[0021] A third light-transmitting hole is formed on the light source support frame, so that light can pass through the first light-transmitting hole and the third light-transmitting hole, and reach the second light-transmitting hole under the guidance of the lens assembly. The surface of the light source support frame facing the first light-transmitting hole is the light source mounting surface, and the light source mounting surface is used to support the light source assembly.

[0022] Optionally, the light source support frame includes a main support plate and at least one limit plate. The main support plate is located in the accommodating space and is fixedly connected to the lens cover shell to divide the accommodating space into the light source accommodating space and the lens accommodating space. The surface of the main support plate facing the first light-transmitting hole is the light source mounting surface, and the third light-transmitting hole passes through the main support plate. The limit plate is arranged on the side of the main support plate away from the first light-transmitting hole, and a wiring gap is formed between the limit plate and the side wall of the lens cover shell.

[0023] Optionally, the lens hood housing includes a front lens hood frame and a middle and rear lens hood frame assembly. A front middle frame opening is formed at the front end of the middle and rear lens hood frame assembly, and the second light-transmitting hole is formed at the rear end of the middle and rear lens hood frame assembly. The front lens hood frame is disposed in front of the middle and rear lens hood frame assembly. The main body support plate is disposed between the rear end face of the front lens hood frame and the front end face of the middle and rear lens hood frame assembly. A wire routing space is formed between the limiting plate and the side wall of the middle and rear lens hood frame assembly.

[0024] Optionally, the cross-section of the accommodation space is polygonal, and the shape of the main body support plate is polygonal and matches the cross-section of the accommodation space.

[0025] The light source support frame includes a plurality of the limiting plates. The number of the limiting plates is less than the number of sides of the polygon. The plurality of limiting plates are arranged around the third light-transmitting hole and are respectively disposed at different sides of the main body support plate. The limiting plate is parallel and opposite to the corresponding side wall of the middle and rear lens hood frame assembly.

[0026] Optionally, the lens hood further includes a first sealing ring. The first sealing ring is disposed between the front lens hood frame and the middle and rear lens hood frame assembly to seal the front lens hood frame and the middle and rear lens hood frame assembly.

[0027] Optionally, the first sealing ring includes a first base ring and a first reinforcing ring. The first reinforcing ring is disposed on the first base ring and extends in a direction away from the first base ring along the axial direction.

[0028] The first base ring is disposed on the front end face of the middle and rear lens hood frame assembly and is disposed around the periphery of the main body support plate. The first reinforcing ring is inserted into the front lens hood frame and fits with the inner side wall of the front lens hood frame.

[0029] Optionally, the middle and rear lens hood frame assembly includes a middle lens hood frame and a rear lens hood shell. The second light-transmitting hole is formed at the rear end of the rear lens hood shell. The front end of the middle lens hood frame is fixedly connected to the front lens hood frame, and the rear end of the middle lens hood frame is fixedly connected to the rear lens hood shell. The front middle frame opening is formed at the front end of the middle lens hood frame. A rear middle frame opening is formed at the rear end of the middle lens hood frame, and a front rear shell opening is formed at the front end of the rear lens hood shell.

[0030] The rear middle frame opening is aligned with the front rear shell opening so that the middle lens hood frame communicates with the rear lens hood shell.

[0031] Optionally, the lens hood further includes a second sealing ring. A sealing ring mating portion is formed on the front end surface of the rear housing of the lens hood. The second sealing ring mates with the sealing ring mating portion to be fixed on the rear housing of the lens hood and is located between the middle frame of the lens hood and the rear housing of the lens hood.

[0032] Optionally, the second sealing ring includes a second base ring and a second reinforcing ring. The second reinforcing ring is disposed on the second base ring and extends in a direction away from the second base ring along the axial direction. The second base ring mates with the sealing ring mating portion, and the second reinforcing ring is inserted into the middle frame of the lens hood and fits against the inner side wall of the middle frame of the lens hood.

[0033] Optionally, the light source support frame further includes a first light-shielding cylinder. The first light-shielding cylinder is disposed around the third light-transmitting hole and is disposed on a side of the main body support plate away from the second light-transmitting hole.

[0034] Optionally, the lens hood further includes a third sealing ring. The third sealing ring is disposed on the rear end surface of the lens hood housing.

[0035] Optionally, the lens hood further includes a lens protection member. The lens protection member includes a mounting plate, a light-transmitting plate, and a second light-shielding cylinder. A light-transmitting plate mounting hole is formed in the mounting plate. The mounting plate is fixed on the lens hood housing and is located at the first light-transmitting hole. The light-transmitting plate is disposed in the light-transmitting plate mounting hole and is aligned with the third light-transmitting hole. The second light-shielding cylinder is disposed on a surface of the mounting plate facing the light source support frame and is disposed around the light-transmitting plate.

[0036] As a third aspect of the present application, there is provided a lens module. The lens module includes a lens hood and a lens assembly. Among them, the lens hood is the lens hood described in the second aspect of the present application. The lens module further includes a light source assembly. The lens assembly is disposed in the lens accommodation space. The light source assembly is disposed on the light source mounting surface and is located in the light source accommodation space. The light emitted by the light source assembly can pass through the first light-transmitting hole and exit from the lens hood. The light incident through the first light-transmitting hole can pass through the third light-transmitting hole and exit from the third light-transmitting hole under the guidance of the lens assembly.

[0037] Optionally, the light source assembly includes a light-emitting driving circuit board and a plurality of light-emitting elements. The light-emitting driving circuit board is disposed around the third light-transmitting hole on the light source mounting surface. The plurality of light-emitting elements are disposed around the third light-transmitting hole on a side of the light-emitting driving circuit board facing the first light-transmitting hole and are electrically connected to the light-emitting driving circuit board.

[0038] Optionally, the lens assembly includes a driving module and a lens. The driving module is fixed on the lens hood. The light incident side of the lens faces the third light-transmitting hole, and the light exiting side of the lens faces the second light-transmitting hole. The driving module is configured to drive the lens to change the focal length of the lens.

[0039] In the embodiments of the present application, for the light source assembly integrated in the lens module, when it is necessary to use the light source assembly for supplementary lighting, a control signal is provided to the light source assembly and power is supplied through the main board assembly and the dual-drive cable, so that the light source assembly emits light and exits from the first light-transmitting hole, illuminating the front of the machine vision device. Correspondingly, the intensity of the light reflected by the objects in the illuminated area is also higher, enters the first light-transmitting hole, exits from the second light-transmitting hole under the guidance of the lens assembly, and finally irradiates on the photosensitive surface of the photosensitive circuit board assembly. In addition, the main board assembly also supplies power to and controls the lens assembly through the dual-drive cable to change the focal length and / or the focusing position of the lens assembly to obtain the required image.

[0040] Since more light reaches the photosensitive surface and the focusing of the lens assembly can be achieved, the machine vision device can obtain clearer imaging.

[0041] These features and advantages of the present invention will be disclosed in detail in the following specific embodiments and the accompanying drawings. The best embodiments or means of the present invention will be shown in detail in combination with the accompanying drawings, but it is not a limitation of the technical solution of the present invention. In addition, these features, elements, and components appear multiple times in the following text and drawings, and different symbols or numbers are marked for convenience of representation, but they all represent components with the same or similar structures or functions. Description of the Drawings

[0042] The present invention will be further described below with reference to the accompanying drawings:

[0043] Figures 1 to 3 is an exploded perspective view of the industrial camera provided by the embodiments of the present application, where Figures 1 to 3 the perspectives are all different;

[0044] Figure 4 is a schematic diagram of the overall structure of the industrial camera provided by the embodiments of the present application;

[0045] Figure 5 is a schematic diagram of the structure of the cable protection member;

[0046] Figure 6 is a schematic diagram of the structure of the rear shell of the lens hood.

[0047] Among them, the reference numerals are as follows:

[0048] 100: lens hood housing 101: first light-transmitting hole

[0049] 102: Second light-transmitting hole 110: Lens hood

[0050] 200: Light source support frame 201: Third light-transmitting hole

[0051] 210: Main body support plate 220: Limiting plate

[0052] 300: Lens assembly 310: Driving module

[0053] 320: Lens 400: Light source module

[0054] 410: Driving circuit board 420: Light-emitting element

[0055] 510: First sealing ring 511: First base ring

[0056] 512: First reinforcing ring 520: Second sealing ring

[0057] 521: Second base ring 522: Second reinforcing ring;

[0058] 530: Third sealing ring 600: Industrial camera

[0059] 610: Main body housing 611: Lens mounting seat

[0060] 612: Front frame of the main body 613: Middle frame of the main body

[0061] 614: Rear cover of the main body Detailed implementation manners

[0062] The embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. Based on the embodiments in the implementation manners, it is intended to explain the present invention and should not be construed as a limitation to the present invention.

[0063] As used in this specification, the phrase "one embodiment" or "example" or "instance" means that a particular feature, structure, or characteristic described in connection with the embodiment itself may be included in at least one embodiment disclosed in this application. The appearances of the phrase "in one embodiment" in various positions in the specification do not necessarily refer to the same embodiment.

[0064] In the embodiments of this application, "front" refers to the light-emitting direction of the light source assembly, and "rear" refers to the direction opposite to the light-emitting direction of the light source assembly.

[0065] As a first aspect of the present invention, a machine vision device is provided, as Figure 1 shown. The machine vision device includes an industrial camera 600 and a lens module. AsFigure 2 As shown, the industrial camera includes a main body housing 610, a photosensitive circuit board assembly, and a main board assembly 630. A photosensitive through hole is formed on the main body housing. The photosensitive circuit board assembly and the main board assembly 630 are both disposed in the main body housing 610, and the photosensitive surface of the photosensitive circuit board assembly faces the photosensitive through hole. The main board assembly is used to drive the photosensitive circuit board assembly.

[0066] The lens module includes a lens hood, a light source assembly 400, and a lens assembly 300. The machine vision device further includes a dual-drive cable 730.

[0067] In an embodiment of the present application, the lens hood includes a lens hood housing 100. A first light-transmitting hole 101 and a second light-transmitting hole 102 are formed on the lens hood housing 100. The light source assembly 400 and the lens assembly 300 are both disposed in the accommodation space defined by the lens hood housing 100, and the light source assembly 400 is disposed around the lens assembly 300. The lens assembly 300 is used to guide the light incident through the first light-transmitting hole 101 to the second light-transmitting hole 102.

[0068] The rear end of the lens hood housing 100 is hermetically connected to the front end of the main body housing 610, and the second light-transmitting hole is aligned with the photosensitive through hole. In this way, the light incident through the first light-transmitting hole can irradiate on the photosensitive surface of the photosensitive circuit board assembly, and finally imaging is achieved.

[0069] A first cable through hole is further formed on the lens hood housing 100. One end of the dual-drive cable 730 passes through the first cable through hole and is electrically connected to the light source assembly 400 and the lens assembly 300 respectively. The other end of the dual-drive cable 730 is electrically connected to the main board assembly to control the light source assembly 400 and the lens assembly 300 respectively through the main board assembly.

[0070] In an embodiment of the present application, for the light source assembly 400 integrated in the lens module, when it is necessary to use the light source assembly 400 for supplementary lighting, a control signal is provided to the light source assembly 400 and power is supplied through the main board assembly and the dual-drive cable 730, so that the light source assembly 400 emits light and exits from the first light-transmitting hole, illuminating the front of the machine vision device. Correspondingly, the intensity of the light reflected by the objects in the illuminated area is also higher, enters the first light-transmitting hole, exits from the second light-transmitting hole under the guidance of the lens assembly 300, and finally irradiates on the photosensitive surface of the photosensitive circuit board assembly. In addition, the main board assembly also supplies power to and controls the lens assembly 300 through the dual-drive cable 730 to change the focal length and / or the focusing position of the lens assembly 300 to obtain the required image.

[0071] Since more light reaches the photosensitive surface and the focusing of the lens assembly 300 can be achieved, the machine vision device can obtain clearer imaging.

[0072] In the machine vision device, the main board assembly integrates the functions of controlling the light source assembly 400 and the lens assembly 300, eliminating the need to separately set up power modules and control modules for the light source assembly 400 and the lens assembly 300 respectively, thus improving the integration and compactness of the machine vision device.

[0073] Optionally, to protect the end of the dual-drive cable 730, the lens hood further includes a cable mounting interface member 710. A second cable through-hole 711 is formed on the cable mounting interface member 730. The cable mounting interface member 710 is provided at the rear end of the lens hood housing 100. The first cable through-hole is aligned and communicated with the second cable through-hole 711, and the dual-drive cable 730 passes through the second cable through-hole and enters the first cable through-hole.

[0074] Optionally, to facilitate installation and improve the installation strength of the dual-drive cable 730, as Figure 6 shown, a plurality of first clamping blocks 712 are formed at the rear end of the second cable through-hole. The plurality of first clamping blocks 712 are circumferentially spaced along the circumference of the second cable through-hole 711, and the first clamping blocks 712 protrude towards the axis of the second cable through-hole 711.

[0075] Correspondingly, the dual-drive cable 730 includes a light source drive cable, a lens drive cable, a cable housing, and a cable protection member 720. The light source drive cable and the lens drive cable are both disposed within the cable housing. The cable protection member 720 is located at one end of the cable housing. A third cable through-hole is formed on the cable protection member 720. The light source drive cable and the lens drive cable both pass through the third cable through-hole, and enter the lens hood housing 100 through the second cable through-hole and the first cable through-hole.

[0076] As Figure 5 shown, the cable protection member 720 includes an insertion portion 723, a protection member body 724, and a plurality of second clamping blocks 722. The insertion portion 723 is provided on the front end face of the protection member body 724. The third cable through-hole penetrates through the insertion portion 723 and the protection member body 724. The plurality of second clamping blocks 722 are provided on the outer peripheral surface of the insertion portion 723 and are arranged around the insertion portion 723.

[0077] The maximum dimension of the second clamping block 722 along the circumference of the insertion portion 723 is smaller than the dimension of the interval between two adjacent first clamping blocks 712 along the circumference of the first cable through-hole.

[0078] The second cable through-hole is aligned with the third cable through-hole. The second clamping block 722 can be inserted into the first cable through-hole through the gap between two adjacent first clamping blocks 712 and rotated to a position overlapping with the corresponding first clamping block 712.

[0079] The first clamping block 712 and the second clamping block 722 are in mutual abutment, which can prevent the dual-drive cable 730 from disengaging from the lens hood housing 100.

[0080] Optionally, in order to improve the sealing performance, sealant is filled between the inner wall of the first cable through-hole and the dual-drive cable 730.

[0081] As described above, the rear end of the lens hood housing 100 is hermetically connected to the front end of the main body housing 610. Optionally, a third sealing ring 530 is provided between the rear end of the lens hood housing 100 and the front end of the main body housing 610.

[0082] As Figure 2 shown, the main body housing 610 may include a lens mounting seat 611, a main body front frame 612, a main body middle frame 613, and a main body rear cover 614. The mounting end of the lens module is fixed on the lens mounting seat 611. The lens mounting seat 611 is formed on the front section surface of the main body front frame 612, and the photosensitive through-hole is also formed on the main body front frame 612. The main body front frame 612, the main body middle frame 613, and the main body rear cover 614 are hermetically connected in sequence, and the sealing level of the industrial camera 600 meets the requirements of IP67 level.

[0083] As a second aspect of the present application, a lens hood is provided. As Figures 1 to 3 shown, the lens hood includes a lens hood housing 100. An accommodation space is defined in the lens hood housing 100, and a first light-transmitting hole 101 and a second light-transmitting hole 102 are formed on the lens hood housing 100.

[0084] The accommodation space is used to accommodate the light source assembly 400 and the lens assembly 300. A first cable through-hole for the dual-drive cable 730 to route is further formed on the lens hood housing 100. One end of the dual-drive cable 730 is used to be electrically connected to the light source assembly 400 and the lens assembly 300 respectively, and the other end of the dual-drive cable 730 is used to be electrically connected to the main board assembly of the industrial camera, so as to control the light source assembly 400 and the lens assembly 300 respectively through the main board assembly.

[0085] It should be noted that the lens hood provided in the second aspect of the present application is the lens hood used in the machine vision device provided in the first aspect of the present application. In the embodiment of the present application, in addition to being able to accommodate the lens assembly 300, the accommodation space of the lens hood can also accommodate the light source assembly 400. Moreover, a double-drive cable 730 is provided on the lens hood housing 100, and the control of the light source assembly and the lens assembly can be realized through the main board assembly of the industrial camera, which improves the integration degree of the machine vision device.

[0086] As an optional implementation manner, as described above, the lens hood further includes a cable installation interface member 710. A second cable through hole 711 is formed on the cable installation interface member 710. The cable installation interface member 710 is arranged at the rear end of the lens hood housing 100. The first cable through hole is aligned and communicated with the second cable through hole 711, and the double-drive cable 730 can pass through the second cable through hole and enter the first cable through hole.

[0087] As an optional implementation manner, a plurality of first clamping blocks 712 are formed at the rear end of the second cable through hole. The plurality of first clamping blocks 712 are spaced apart along the circumferential direction of the first cable through hole, and the first clamping blocks protrude towards the axis of the second cable through hole 711. The first clamping blocks 712 can cooperate with the second clamping blocks 722 on the cable protection member 720. This has been described in detail above and will not be elaborated here.

[0088] Optionally, the lens hood further includes a light source support frame 200. The light source support frame 200 is arranged in the accommodation space and divides the accommodation space into a light source accommodation space and a lens accommodation space. The light source accommodation space and the first light transmission hole 101 are on one side of the light source support frame 200, and the lens accommodation space and the second light transmission hole 102 are on the other side of the light source support frame 200. The lens accommodation space is used to accommodate the lens assembly 300.

[0089] A third light transmission hole 201 is formed on the light source support frame 200 so that light can pass through the first light transmission hole 101 and the third light transmission hole 201, and reach the second light transmission 102 under the guidance of the lens assembly 300. The surface of the light source support frame 200 facing the first light transmission hole 101 is the light source installation surface, and the light source installation surface is used to carry the light source assembly 400.

[0090] As described above, the lens hood provided in the embodiments of the present application is part of a lens module for an industrial camera. Specifically, the lens module includes the lens hood, a lens assembly 300 disposed within a lens hood housing 100, and a light source assembly 400 disposed within the lens hood 100. When the industrial camera is in use, the light source assembly 400 is controlled to emit light. The light emitted by the light source assembly 400 can be emitted from the lens module through the first light-transmitting hole 101, thereby illuminating the environment in which the industrial camera is located. This can increase the amount of light entering the lens assembly 300, ultimately improving the imaging quality of the industrial camera.

[0091] In the embodiment of the present application, there is no special limitation on the specific structure of the light source support frame 200, as long as it can be fixedly connected to the lens cover shell 100 and provide a mounting position for the light source assembly 400. As an optional embodiment, the light source support frame 200 includes a main support plate 210 and at least one limit plate 220. The main support plate 210 is located in the accommodating space and is fixedly connected to the lens cover shell 100 to divide the accommodating space into the light source accommodating space and the lens accommodating space. The surface of the main support plate 210 facing the first light transmission hole is the light source installation surface. The third light transmission hole passes through the main support plate 210. The limit plate 220 is arranged on the side of the main support plate 210 away from the first light transmission hole, and a wiring gap is formed between the limit plate 220 and the side wall of the lens cover shell 100.

[0092] The limiting plate 220 has a certain width. Therefore, the wiring interval defined by the limiting plate 220 and the lens cover housing 100 can also have a certain width, which can better limit the wiring while accommodating more wiring. It should be noted that the "width" here refers to the dimension along the circumference of the lens cover housing 100.

[0093] It should be noted that in the embodiment of the present application, the light source assembly 400 requires external power to emit light, and the driver module of the lens assembly 300 also requires external power to drive the lens assembly. The addition of the light source assembly 400 to the lens cover increases the number of wiring. Accordingly, a wiring gap is formed between the light source support frame 200 and the side wall of the lens cover shell 100. The wiring electrically connected to the light source assembly 400 and the wiring electrically connected to the driver module of the lens assembly 300 are both arranged in the wiring gap, thereby avoiding interference between the wiring and the lens assembly 300 and the light source subassembly 400, and making it easier to assemble the lens module.

[0094] In the embodiments of the present application, there is no special limitation on how to fixedly connect the light source support frame 200 to the lens hood housing 100. For example, the light source support frame 200 can be fixedly arranged in the lens hood housing 100 by bonding or welding.

[0095] Optionally, to improve the heat dissipation effect, the limiting plate 220 is connected to the inner side wall of the lens hood housing 100 through a heat conducting member, so that the heat generated by the light source assembly can be conducted to the lens hood housing 100.

[0096] Optionally, the heat conducting member can be a heat conducting foam.

[0097] Optionally, to avoid rubbing off the heat conducting member when installing the light source support frame 200, the angle between the limiting plate 220 and the main body support plate 210 is less than 90°.

[0098] For the convenience of installation, in an optional implementation manner, the lens hood housing 100 can include a lens hood front frame 110 and a lens hood middle and rear frame assembly 120. A middle frame front opening 120a is formed at the front end of the lens hood middle and rear frame assembly 120, and the second light transmitting hole 102 is formed at the rear end of the lens hood middle and rear frame assembly 120. The lens hood front frame 110 is arranged in front of the lens hood middle and rear frame assembly 120, the main body support plate 210 is arranged between the rear end face of the lens hood front frame 110 and the front end face of the lens hood middle and rear frame assembly 120, and the wire routing interval is formed between the limiting plate 220 and the side wall of the lens hood middle and rear frame assembly 120.

[0099] In the above implementation manner, the lens hood housing 100 is of a split structure. First, the lens hood front frame 110, the light source support frame 200, and the lens hood middle and rear frame assembly 120 are assembled in place, and then the three are fixedly connected by fasteners.

[0100] In the embodiments of the present application, there is no special limitation on the shape of the accommodation space, as long as it can accommodate the light source support frame 200, the lens assembly 300, the light source assembly 400, and the corresponding wire routing and auxiliary components. For the convenience of assembly, optionally, the cross-section of the accommodation space is a polygon. Correspondingly, the shape of the main body support plate 210 is a polygon matching the cross-section of the accommodation space. For example, the cross-section of the accommodation space can be a hexagon, and correspondingly, the shape of the main body support plate 210 is also a hexagon.

[0101] In the embodiments of the present application, the light source support frame 200 can include a plurality of limiting plates 220, and the number of the limiting plates 220 is less than the number of sides of the polygon. For example, when the main body support plate 210 is a hexagon, the light source support frame 200 includes 3 limiting plates 220.

[0102] A plurality of limiting plates 220 are arranged around the third light-transmitting hole and are respectively arranged at different sides of the main body support plate 210. The limiting plates 220 are parallel and opposite to the corresponding side walls of the rear frame assembly 120 in the lens hood. There is a gap between two adjacent limiting plates 220, which is convenient for observing the distribution of the wire routing in the lens hood housing. Moreover, reducing the number of limiting plates 220 can save costs and reduce the overall weight of the lens hood.

[0103] In the embodiment shown in the figure, the main body support plate 210 is hexagonal, and 3 limiting plates 220 are arranged on the main body support plate 210. There is an edge without a limiting plate 220 between any two adjacent limiting plates 220.

[0104] Optionally, to improve the sealing performance of the lens hood, the lens hood further includes a first sealing ring 500. The first sealing ring 510 is arranged between the front frame 110 of the lens hood and the rear frame assembly 120 in the lens to seal the front frame 110 and the rear frame assembly 120 of the lens hood.

[0105] Optionally, to further improve the sealing performance between the front frame 110 and the rear frame assembly 120 of the lens hood, the first sealing ring 510 is a special-shaped sealing ring. Specifically, as Figure 1 shown, the first sealing ring 510 includes a first base ring 511 and a first reinforcing ring 512. The first reinforcing ring 512 is arranged on the first base ring 511 and extends in the axial direction away from the first base ring 511. The first base ring 511 is arranged on the front end face of the rear frame assembly 120 in the lens hood and is arranged around the periphery of the main body support plate 210. The first reinforcing ring 512 is inserted into the front frame 110 of the lens hood and fits with the inner side wall of the front frame 510 of the lens hood.

[0106] By arranging the first reinforcing ring 512, the deformation degree of the first sealing ring 510 after the lens module is assembled can be increased, and finally the sealing performance can be improved.

[0107] For the convenience of assembly, the cross-sectional shape of the first sealing ring 510 is the same as that of the front frame 110 of the lens hood, both being polygonal. In the embodiment shown in the figure, the cross-sectional shape of the first sealing ring 510 is hexagonal.

[0108] In the embodiments of the present application, the specific structure of the rear frame assembly 120 in the lens hood is not particularly limited, as long as it can accommodate the lens assembly and the corresponding wire routing. In the embodiments of the present application, the lens assembly has a relatively large axial length. For the convenience of processing and to provide sufficient installation space for the lens, optionally, the rear frame assembly 120 in the lens hood includes the middle frame 121 of the lens hood and the rear shell 122 of the lens hood. The second light-transmitting hole 102 is formed at the rear end of the rear shell 122 of the lens hood. The front end of the middle frame 121 of the lens hood is fixedly connected to the front frame 110 of the lens hood, and the rear end of the middle frame 121 of the lens hood is fixedly connected to the rear shell 122 of the lens hood. The front opening of the middle frame is formed at the front end of the middle frame 121 of the lens hood. The rear end of the middle frame 121 of the lens hood is formed with a rear opening of the middle frame, and the front end of the rear shell 122 of the lens hood is formed with a front opening of the rear shell.

[0109] The rear opening of the middle frame is aligned with the front opening of the rear shell so that the middle frame of the lens hood communicates with the rear shell of the lens hood.

[0110] In the embodiments of the present application, the axial length of the middle frame 121 of the lens hood can be greater than the axial length of the rear shell 122 of the lens hood, so that the rear frame assembly 120 in the lens hood has a relatively large lens accommodation space and enables the lens hood to adapt to different types of lenses (for example, electric lenses or liquid lenses) and different specifications of lenses. Moreover, the middle frame 121 of the lens hood is detachably connected to the front frame 110 of the lens hood and is also detachably connected to the rear shell 122 of the lens hood. By replacing the middle frame 121 of the lens hood with different axial lengths, the lens hood can be adapted to different types and different specifications of lenses.

[0111] As an optional implementation manner, the lens mounting seat on the industrial camera 600 passes through the second light-transmitting hole on the rear shell 122 of the lens hood and is connected to the lens.

[0112] To increase the sealing performance, optionally, as Figure 3 shown, the lens hood further includes a second sealing ring 520. A sealing ring mating portion is formed on the front end face of the rear shell 122 of the lens hood. The second sealing ring 520 cooperates with the sealing ring mating portion 122a to be fixed on the rear shell 122 of the lens hood and is located between the middle frame 121 of the lens hood and the rear shell 122 of the lens hood.

[0113] It should be noted that the function of the sealing ring mating portion is to limit the second sealing ring 520. The sealing ring mating portion 122a can be a protrusion or a groove.

[0114] As an optional implementation manner, the second sealing ring 520 can also be a special-shaped sealing ring. Specifically, as Figure 3As shown, the second sealing ring 520 includes a second base ring 521 and a second reinforcing ring 522. The second reinforcing ring 522 is disposed on the second base ring 521 and extends in the axial direction away from the second base ring 521. The second base ring 521 cooperates with the sealing ring mating portion 122a, and the second reinforcing ring 522 is inserted into the lens hood middle frame 121 and fits against the inner side wall of the lens hood middle frame 121.

[0115] The second sealing ring 520 includes the second reinforcing ring 522. After the lens module is assembled, the second sealing ring 520 can produce a large elastic deformation and form a better sealing effect.

[0116] Optionally, as Figure 3 shown, the lens hood further includes a third sealing ring 530 and a plurality of sealing ring fixing posts. The third sealing ring 530 is disposed on the rear end face of the lens hood housing 100.

[0117] Setting the third sealing ring 530 can ensure the sealing performance between the lens module and the industrial camera.

[0118] Optionally, as Figure 1 shown, the lens hood further includes a lens protection member 140. The lens protection member 140 includes a mounting plate 141, a light-transmitting plate 142, and a light-shielding cylinder 143. A light-transmitting plate mounting hole is formed in the mounting plate 141. The mounting plate 141 is fixed to the lens hood housing 100 and is located at the first light-transmitting hole 101. The light-transmitting plate 142 is disposed in the light-transmitting plate mounting hole and is aligned with the third light-transmitting hole. The light-shielding cylinder 142 is disposed on the surface of the mounting plate 141 facing the light source support frame 120 and surrounds the light-transmitting plate 142.

[0119] Setting the light-shielding cylinder 143 can prevent the light emitted by the light source assembly from directly shining on or reflecting onto the lens assembly, reducing or even eliminating the influence of the light source assembly on imaging. As an optional implementation manner, the material of the light-shielding cylinder 143 can be a plastic material, and it can be fixed to the mounting plate 141 by dispensing, without affecting the EMC reliability of the industrial camera.

[0120] The main function of the light-transmitting plate 142 is to protect the lens module without affecting light transmission. As an optional implementation manner, the light-transmitting plate 142 can be a filter to perform filtering on the external light incident on the lens hood according to actual requirements, improving the imaging quality.

[0121] As a third aspect of the present application, a lens module is provided. The lens module includes a lens hood and a lens assembly 300. Among them, the lens hood is the lens hood described in the first aspect of the present application. The lens module may further include a light source assembly 400. The lens assembly 300 is disposed in the lens accommodation space. The light source assembly 400 is disposed on the light source mounting surface and is located in the light source accommodation space. The light emitted by the light source assembly 400 can pass through the first light transmission hole and exit from the lens hood. The light incident through the first light transmission hole can pass through the third light transmission hole and exit from the third light transmission hole under the guidance of the lens assembly 300.

[0122] As described above, the lens module is a part of an industrial camera. When using the industrial camera, the light source assembly 400 is controlled to emit light. The light emitted by the light source assembly 400 can exit from the lens module through the first light transmission hole 101, thereby illuminating the environment where the industrial camera is located, increasing the amount of light entering the lens assembly 300, and ultimately improving the imaging quality of the industrial camera.

[0123] In the embodiment of the present application, the light source assembly 400 needs to be externally powered to emit light, and the driving module of the lens assembly 300 also needs to be externally powered to drive the lens assembly to be powered. After adding the light source assembly 400 to the lens hood, the number of wiring will increase. Accordingly, a wiring interval is formed between the light source support frame 200 and the side wall of the lens hood housing 100. The wiring electrically connected to the light source assembly 400 and the wiring electrically connected to the driving module of the lens assembly 300 are both disposed in the wiring interval, thereby avoiding interference between the wiring and the lens assembly 300 and the light source sub-assembly 400, and also making it more convenient to assemble the lens module.

[0124] Optionally, the light source assembly 400 includes a light-emitting driving circuit board 410 and a plurality of light-emitting elements 420. The light-emitting driving circuit board 410 is disposed around the third light transmission hole on the light source mounting surface. The plurality of light-emitting elements 420 are disposed around the third light transmission hole on the side of the light-emitting driving circuit board 410 facing the first light transmission hole and are electrically connected to the light-emitting driving circuit board 410.

[0125] Setting a plurality of light-emitting elements 420 can not only improve the light-emitting brightness of the light source assembly 400, but also improve the light-emitting uniformity.

[0126] Optionally, the light-emitting element 420 may include an LED lamp bead and a concave mirror to further improve the light-emitting uniformity. The LED lamp bead is disposed in the corresponding concave mirror, and the concave mirror can convert the divergent light emitted by the LED lamp bead into parallel light for emission.

[0127] Optionally, the lens assembly 300 includes a driving module 310 and a lens 320, wherein the driving module is fixed on the lens cover, the light incident side of the lens 320 is opposite to the third light-transmitting hole, and the light-emitting side of the lens 320 is opposite to the second light-transmitting hole, and the driving module 310 is used to drive the lens 320 to change the focal length of the lens 320.

[0128] In the above embodiment, the lens 320 may be a motorized lens, a liquid lens, or an FA lens.

[0129] As an optional embodiment, the lens 320 includes a linear drive member and a plurality of optical lenses arranged in sequence along the axis of the lens 320. The drive module 310 may include a drive motor and a transmission mechanism. The plurality of optical lenses are arranged on the linear drive member, and the transmission mechanism includes a first transmission gear mounted on the exterior of the linear drive member, a second transmission gear meshing with the first transmission gear, and the second transmission gear is in driving connection with the output shaft of the drive motor.

[0130] As described above, the cable is set in the wiring gap between the limit plate and the inner wall of the lens cover shell. When the drive motor, the first transmission gear, and the second transmission gear rotate, the cable will not be entangled with the wiring, which can make the zoom process of the industrial camera smoother and more stable and improve the service life of the industrial camera.

[0131] The following describes the assembly process of the lens module.

[0132] First, pre-fix the cable guard 720 of the dual drive cable 730 to the lens cover housing 100, and then dispense glue inside the lens cover housing 100;

[0133] Next, place the third sealing ring 530 in the sealing groove on the rear end surface of the lens cover housing rear cover 122, and insert it into the main body front frame 612. Make sure that the screw holes of the lens cover housing rear cover 122 and the threaded holes of the main body front frame 612 are aligned. Then, fix the lens cover housing rear cover 122 to the main body front frame 612 with four set screws.

[0134] Put the first sealing ring 510 on the rear end of the lens cover housing middle frame 121, then put it into the lens cover housing back cover 122, and lock the four set screws on the lens cover housing back cover 122 to fix the lens cover housing middle frame 121;

[0135] Next, the lens hood filter component is fixed by dispensing on the front cover 110 of the lens hood housing. The second sealing ring 5520 is sleeved on the rear end of the front cover 110 of the lens hood housing. The thermal conductive foam is pasted on the limiting plate 220 of the light source support frame 200. Then, the light source component and the light source support frame 200 are stacked together and fixed in the corresponding mounting holes of the front cover 110 of the lens hood housing by screws. The connectors of the corresponding double-drive cables 730 are respectively inserted into the light source component and the lens component. Finally, the middle frame 121 of the lens hood housing is sleeved, thus completing the assembly of the entire lens hood.

[0136] The above is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Those skilled in the art should understand that the present invention includes but is not limited to the content described in the drawings and the above specific implementation manner. Any modification that does not deviate from the functional and structural principles of the present invention will be included in the scope of the claims.

Claims

1. A machine vision device, the machine vision device comprising an industrial camera (600) and a lens module. The industrial camera includes a main body housing (610), a photosensitive circuit board assembly, and a main board assembly. A photosensitive through hole is formed on the main body housing. The photosensitive circuit board assembly and the main board assembly are both disposed in the main body housing (610), and the photosensitive surface of the photosensitive circuit board assembly faces the photosensitive through hole. The main board assembly is used to drive the photosensitive circuit board assembly, and it is characterized in that, The lens module includes a lens hood, a light source assembly (400) and a lens assembly (300), and the machine vision device further includes a dual-drive cable (730); The lens hood includes a lens hood housing (100). A first light-transmitting hole (101) and a second light-transmitting hole (102) are formed on the lens hood housing (100). Both the light source assembly (400) and the lens assembly (300) are disposed in the accommodation space defined by the lens hood housing (100), and the light source assembly is disposed around the lens assembly (300). The lens assembly (300) is configured to guide the light incident through the first light-transmitting hole (101) to the second light-transmitting hole (102); The rear end of the lens hood housing (100) is hermetically connected to the front end of the main body housing (610), such that the second light-transmitting hole is aligned with the photosensitive through-hole; A first cable through-hole is further formed on the lens hood housing (100). One end of the dual-drive cable (730) passes through the first cable through-hole and is electrically connected to the light source assembly and the lens assembly respectively. The other end of the dual-drive cable (730) is electrically connected to the main board assembly, so as to control the light source assembly (400) and the lens assembly (300) respectively through the main board assembly.

2. The machine vision device according to claim 1, wherein The lens hood further includes a cable mounting interface member (710). A second cable through-hole (711) is formed on the cable mounting interface member. The cable mounting interface member (710) is disposed at the rear end of the lens hood housing (100). The first cable through-hole is aligned and communicated with the second cable through-hole (711), and the dual-drive cable (730) passes through the second cable through-hole and enters the first cable through-hole.

3. The machine vision device according to claim 2, wherein A plurality of first clamping blocks (712) are formed at the rear end of the second cable through-hole. The plurality of first clamping blocks are circumferentially spaced apart along the circumference of the second cable through-hole, and the first clamping blocks protrude towards the axis of the second cable through-hole; The dual-drive cable (730) includes a light source drive cable, a lens drive cable, a cable housing and a cable protection member (720). The light source drive cable and the lens drive cable are both disposed in the cable housing. The cable protection member is located at one end of the cable housing. A third cable through-hole is formed on the cable protection member. The light source drive cable and the lens drive cable both pass through the third cable through-hole, and enter the lens hood housing through the second cable through-hole and the first cable through-hole, The cable protection member (720) includes an insertion portion (723), a protection member body (724) and a plurality of second clamping blocks (722). The insertion portion is disposed on the front end face of the protection member body. The third cable through-hole penetrates through the insertion portion and the protection member body. The plurality of second clamping blocks are disposed on the outer peripheral surface of the insertion portion and are disposed around the insertion portion; The maximum dimension of the second clamping block along the circumference of the insertion portion is smaller than the dimension of the interval between two adjacent first clamping blocks along the circumference of the first cable through-hole; The second cable through-hole is aligned with the third cable through-hole. The second clamping block can be inserted into the first cable through-hole through the gap between two adjacent first clamping blocks and rotated to a position overlapping with the corresponding first clamping block.

4. The machine vision device according to any one of claims 1 to 3, characterized in that, Sealant is filled between the inner wall of the first cable through-hole and the dual-drive cable (730).

5. The machine vision device according to any one of claims 1 to 3, characterized in that, A third sealing ring is provided between the rear end of the lens hood housing (100) and the front end of the main body housing.

6. A lens hood, the lens hood comprising a lens hood housing (100), a receiving space being defined in the lens hood housing (100), a first light-transmitting hole (101) and a second light-transmitting hole (102) being formed in the lens hood housing (100), characterized in that, The accommodating space is used to accommodate the light source assembly (400) and the lens assembly (300). A first cable through-hole for the dual-drive cable (730) to route is further formed on the lens hood housing (100). One end of the dual-drive cable (730) is used to be electrically connected to the light source assembly and the lens assembly respectively, and the other end of the dual-drive cable (730) is used to be electrically connected to the main board assembly of the industrial camera, so as to control the light source assembly (400) and the lens assembly (300) respectively through the main board assembly.

7. The lens hood according to claim 6, characterized in that, The lens hood further includes a cable installation interface part (710). A second cable through-hole (711) is formed on the cable installation interface part. The cable installation interface part (710) is arranged at the rear end of the lens hood housing (100). The first cable through-hole is aligned and communicated with the second cable through-hole (711), and the dual-drive cable (730) can pass through the second cable through-hole and enter the first cable through-hole.

8. The lens hood according to claim 7, characterized in that, A plurality of first clamping blocks (712) are formed at the rear end of the second cable through-hole. The plurality of first clamping blocks are circumferentially spaced apart along the circumference of the first cable through-hole, and the first clamping blocks protrude towards the axis of the second cable through-hole (711).

9. The lens hood according to claim 6, characterized in that, The lens hood further includes a light source support frame (200). The light source support frame (200) is arranged in the accommodating space and divides the accommodating space into a light source accommodating space and a lens accommodating space. The light source accommodating space and the first light-transmitting hole (101) are located on one side of the light source support frame (200), and the lens accommodating space and the second light-transmitting hole are located on the other side of the light source support frame (200). The lens accommodating space is used to accommodate the lens assembly. A third light-transmitting hole (201) is formed on the light source support frame (200) so that light can pass through the first light-transmitting hole (101) and the third light-transmitting hole (201), and reach the second light-transmitting hole (102) under the guidance of the lens assembly. The surface of the light source support frame (200) facing the first light-transmitting hole (101) is a light source installation surface, and the light source installation surface is used to carry the light source assembly (400).

10. The lens hood according to claim 9, characterized in that, The light source support frame (200) comprises a main support plate (210) and at least one limiting plate (220); the main support plate (210) is located in the accommodating space and is fixedly connected to the lens cover shell (100) to divide the accommodating space into the light source accommodating space and the lens accommodating space; the surface of the main support plate (210) facing the first light-transmitting hole is the light source mounting surface; the third light-transmitting hole passes through the main support plate (210); the limiting plate (220) is arranged on a side of the main support plate (210) away from the first light-transmitting hole, and a wiring gap is formed between the limiting plate (220) and the side wall of the lens cover shell (100).

11. The lens hood according to claim 10, characterized in that, The lens cover housing (100) comprises a lens cover front frame (110) and a lens cover middle and rear frame assembly (120); a middle frame front opening is formed at the front end of the lens cover middle and rear frame assembly (120); the second light-transmitting hole is formed at the rear end of the lens cover middle and rear frame assembly (120); the lens cover front frame (110) is arranged in front of the lens cover middle and rear frame assembly (120); the main body support plate (210) is arranged between the rear end surface of the lens cover front frame (110) and the front end surface of the lens cover middle and rear frame assembly (120); and the wiring gap is formed between the limiting plate (220) and the side wall of the lens cover middle and rear frame assembly (120).

12. The lens hood according to claim 11, characterized in that, The cross section of the accommodation space is polygonal, and the shape of the main body support plate is a polygon matching the cross section of the accommodation space; The light source support frame (200) comprises a plurality of the limiting plates (220), the number of the limiting plates (220) being less than the number of sides of the polygon, the plurality of limiting plates (220) being arranged around the third light-transmitting hole, and being respectively arranged at different sides of the main body support plate (210), and the limiting plates (220) being parallel to and opposite to corresponding side walls of the rear frame assembly (120) in the lens hood.

13. The lens hood according to claim 11, characterized in that, The lens hood further comprises a first sealing ring (510), which is arranged between the lens hood front frame (110) and the lens hood middle and rear frame assembly (120) to seal the lens hood front frame (110) and the lens hood middle and rear frame assembly (120).

14. The lens hood according to claim 13, characterized in that, The first sealing ring (510) comprises a first base ring (511) and a first reinforcement ring (512), wherein the first reinforcement ring (512) is arranged on the first base ring (511) and extends in an axial direction away from the first base ring (511). The first base ring (511) is arranged on the front end surface of the rear frame assembly (120) in the lens hood and is circumferentially arranged on the periphery of the main body support plate (210); the first reinforcement ring (512) is inserted into the lens hood front frame (110) and fits against the inner side wall of the lens hood front frame (110).

15. The lens hood according to claim 11, characterized in that, The lens hood middle and rear frame assembly comprises a lens hood middle frame (121) and a lens hood rear shell (122), the second light-transmitting hole is formed at the rear end of the lens hood rear shell (122), the front end of the lens hood middle frame (121) is fixedly connected to the lens hood front frame (110), the rear end of the lens hood middle frame (121) is fixedly connected to the lens hood rear shell (122), the middle frame front opening is formed at the front end of the lens hood middle frame (121), the rear end of the lens hood middle frame is formed with a middle frame rear opening, and the front end of the lens hood rear shell is formed with a rear shell front opening; The rear opening of the middle frame is aligned with the front opening of the rear shell, so that the lens cover middle frame is connected to the lens cover rear shell.

16. The lens hood according to claim 15, characterized in that, The lens cover further comprises a second sealing ring (520), a sealing ring matching portion is formed on the front end surface of the lens cover rear shell, the second sealing ring matches the sealing ring matching portion to be fixed on the lens cover rear shell, and is located between the lens cover middle frame and the lens cover rear shell.

17. The lens hood according to claim 16, characterized in that, The second sealing ring (520) includes a second base ring (521) and a second reinforcement ring (522). The second reinforcement ring is arranged on the second base ring and extends along the axial direction in a direction away from the second base ring. The second base ring is matched with the sealing ring matching portion. The second reinforcement ring is inserted into the lens cover middle frame and fits with the inner side wall of the lens cover middle frame.

18. The lens hood according to any one of claims 10 to 17, characterized in that, The light source support frame further includes a first light-shielding cylinder, which is arranged around the third light-transmitting hole and is arranged on a side of the main body support plate away from the second light-transmitting hole.

19. The lens hood according to any one of claims 6 to 17, characterized in that, The lens cover further comprises a third sealing ring (530), which is arranged on the rear end surface of the lens cover housing.

20. The lens hood according to any one of claims 9 to 17, characterized in that, The lens hood further comprises a lens protection member (140), the lens protection member comprising a mounting plate (141), a light-transmitting plate (142) and a second light-shielding tube (1433), a light-transmitting plate mounting hole being formed on the mounting plate, the mounting plate being fixed to the lens hood housing and being located at the first light-transmitting hole, the light-transmitting plate being arranged in the light-transmitting plate mounting hole and being aligned with the third light-transmitting hole, the second light-shielding tube being arranged on a surface of the mounting plate facing the light source support frame and being arranged around the light-transmitting plate.

21. A lens module, the lens module comprising a lens hood and a lens assembly (300), characterized in that, The lens hood is the lens hood described in any one of claims 6 to 20, and the lens module also includes a light source assembly (400), the lens assembly (300) is arranged in the lens accommodating space, the light source assembly (400) is arranged on the light source mounting surface and is located in the light source accommodating space, the light emitted by the light source assembly can pass through the first light-transmitting hole and be emitted from the lens hood, and the light incident through the first light-transmitting hole can pass through the third light-transmitting hole and be emitted from the third light-transmitting hole under the guidance of the lens assembly.

22. The lens module according to claim 21, wherein The light source assembly (400) includes a light-emitting driving circuit board (410) and a plurality of light-emitting elements (420). The light-emitting driving circuit board is disposed on the light source mounting surface around the third light-transmitting hole. The plurality of light-emitting elements are disposed on one side of the light-emitting driving circuit board facing the first light-transmitting hole around the third light-transmitting hole and are electrically connected to the light-emitting driving circuit board.

23. The lens module according to claim 21 or 22, wherein, The lens assembly includes a driving module (310) and a lens (320). The driving module is fixed on the lens hood. The light-incident side of the lens faces the third light-transmitting hole, and the light-emitting side of the lens faces the second light-transmitting hole. The driving module is used to drive the lens to change the focal length of the lens.

Images