CN220542747U - Defect detection equipment - Google Patents

Abstract

The utility model provides electronic cigarette shell defect detection equipment, and relates to the technical field of defect automatic detection. Wherein, this defect detection equipment, including the mount pad, still including setting up on the mount pad: the detection module comprises a circulation assembly and a plurality of detection stations for detecting different defects, the circulation assembly drives a detection product to circulate among the detection stations, at least one detection station is provided with a rotating mechanism, and the rotating mechanism drives the detection product to rotate; and a connecting position is arranged between the feeding and discharging module and the detection station and/or the circulation assembly, and the detection product is driven to flow into and flow out of the detection module at the connecting position. The utility model utilizes the automatic detection of the detection station, is not interfered by subjective factors of workers, has relatively high detection accuracy and high detection efficiency, and reduces the detection cost.

Description

Defect detection equipment

Technical Field

The utility model relates to the technical field of defect automatic detection, in particular to electronic cigarette shell defect detection equipment.

Background

An electronic cigarette is a battery-powered atomizer that produces "vapor" for a user to inhale through heating the tobacco tar in a tank, with a similar appearance, smoke, taste and feel to a cigarette.

In the production process of the electronic cigarette, whether the electronic cigarette shell is qualified or not is required to be checked in order to ensure the product quality. The conventional inspection method is to observe whether the electronic cigarette shell has defects of small milling, missing milling, unfilled corner, no screw thread in a screw hole, hole hemming, groove line deviation, size deviation and the like manually through naked eyes. For a single electronic cigarette, it often takes more than 30 seconds to manually detect all defects once, and when some defects which are difficult to observe are required to be confirmed, the time consumption is increased, the detection efficiency is low, and the cost of labor and time is high. Moreover, the manual detection is easily influenced by subjective factors of workers, so that the detection accuracy is not high, and often, the second round of rechecking is also needed manually, so that the detection efficiency is further reduced, and the detection cost is improved.

Disclosure of Invention

Aiming at the technical problems, the utility model provides the defect detection equipment, which utilizes the automatic detection of a detection station, is not interfered by subjective factors of workers, has relatively high detection accuracy, has high detection efficiency and reduces the detection cost. The technical scheme is as follows:

the utility model specifically provides defect detection equipment, which comprises a mounting seat and further comprises a sensor arranged on the mounting seat: the detection module comprises a circulation assembly and a plurality of detection stations for detecting different defects, the circulation assembly drives a detection product to circulate among the detection stations, at least one detection station is provided with a rotating mechanism, and the rotating mechanism drives the detection product to rotate; and a connecting position is arranged between the feeding and discharging module and the detection station and/or the circulation assembly, and the detection product is driven to flow into and flow out of the detection module at the connecting position.

Further, the rotating mechanism comprises a rotary table capable of rotating along the axis of the rotary mechanism, the detection product is fixed on the rotary table, and the rotary table drives the detection product to rotate.

Further, the rotating mechanism comprises a plurality of turntables, and the turntables are respectively arranged on different detection stations.

Further, the detection module comprises a first detection station, the rotation mechanism is arranged on the first detection station, and the first detection station comprises a first illumination component and a first imaging component; the illumination range of the first illumination assembly includes an upper surface and at least one first side of the turntable, and the imaging range of the first imaging assembly includes an upper surface and a first side of the turntable.

Further, the first lighting component comprises an annular light source and a first surface light source, the illumination directions of the annular light source and the first surface light source face the rotary table, the first surface light source is arranged at the side of the rotary table, and the illumination directions of the first surface light source face the first side face of the rotary table; the annular light source is arranged above the turntable, and the illumination direction of the annular light source faces the upper surface of the turntable.

Further, the first imaging component comprises a plurality of first cameras, the lenses of the first cameras face the rotary table, one first camera is arranged at the side of the rotary table, and the lenses of the first cameras face the first side face of the rotary table; at least one first camera is arranged above the turntable, and the lens of the first camera faces to the upper surface of the turntable.

Further, the detection module further comprises a second detection station, the second detection station comprises a second illumination assembly, a second imaging assembly and a second fixing piece used for fixing the detection product, the illumination range of the second illumination assembly comprises a second side face of the second fixing piece, the imaging range of the second imaging assembly comprises a second side face and a third side face of the second fixing piece, and the second side face and the third side face are located on two opposite sides of the second fixing piece.

Further, the second lighting component comprises a second surface light source with a through hole in the middle, the second surface light source is arranged at the side of the second fixing piece, and the illumination direction of the second surface light source faces to the second side of the second fixing piece; the second imaging assembly comprises two second imaging devices which are arranged on the side of the second fixing piece, wherein the lens of one second imaging device faces the through hole of the second surface light source and faces the second side face of the second fixing piece, and the lens of the other second imaging device faces the third side face of the second fixing piece.

Further, the detection module further comprises a third detection station, the rotating mechanism is arranged on the third detection station, the third detection station comprises a third illumination assembly and a third imaging assembly, the illumination range of the third illumination assembly comprises all side surfaces of the rotary table, and the imaging range of the third imaging assembly comprises a fourth side surface of the rotary table.

Further, the third illumination assembly is uniformly distributed on the plurality of strip-shaped light sources on the periphery of the turntable, and the illumination directions of the plurality of strip-shaped light sources are opposite to the turntable; the third imaging component comprises a third imaging device arranged on one side of the turntable, and the lens of the dead third imaging device faces to the fourth side face of the turntable.

The utility model has the beneficial effects that:

firstly, the detection equipment disclosed by the utility model fully utilizes automatic detection of the detection stations, is not interfered by subjective factors of workers, has relatively high detection accuracy, and simultaneously saves manpower. In addition, all detection processes of the detection equipment utilize all modules for automatic detection, and compared with the detection time for manually detecting one shell for 30 seconds, the detection equipment of the embodiment can shorten the detection time of one shell to be within 10 seconds, has high detection efficiency and reduces the detection cost.

Secondly, the product is transported in a translation mode by adopting the circulation assembly and is matched with a mode of rotating the product by the rotating mechanism, so that the requirement of full inspection of the product can be met, the product is not required to be moved at multiple angles by utilizing a complex mechanical arm structure, the equipment is simple, and the cost is low. The rotation of the mechanical arm to the product requires longer time and more precise operation compared with the rotating mechanism of the utility model, so the detection efficiency of the detection equipment of the utility model is higher.

Finally, the setting of rotary mechanism can accomplish the comprehensive detection to the defect on the one hand, and on the other hand only needs a small amount of cameras to cooperate a small amount of light sources to take a photograph many times to confirm the defect condition, has reduced the quantity of cameras, has reduced hardware total cost. The circulation assembly is provided with the multiple groups of picking and placing mechanisms, so that three groups of detection stations can be in a continuous working state, the detection efficiency of the detection equipment is further improved, and the detection time is saved.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the drawings that are required to be used in the description of the embodiments of the present utility model will be briefly described below.

FIG. 1 is a top view of an electronic cigarette housing defect detection device;

FIG. 2 is a schematic diagram of the structure of the detection module, rotation mechanism and flow turning assembly;

FIG. 3 is a schematic structural view of a rotary mechanism;

FIG. 4 is a schematic diagram of the structure of the loading and unloading module;

fig. 5 is a schematic structural view of the flow module.

The same reference numbers will be used throughout the drawings to refer to identical or similar parts or components.

10. A detection module; 11. a first detection station; 12. a second detection station; 13. a third detection station;

20. a rotation mechanism; 21. a turntable; 22. a rotary driving member;

30. feeding and discharging modules; 31. a portal frame; 32. a clamping jaw;

40. a flow component; 41. a first slide rail; 42. a picking and placing mechanism;

50. and a shell bin.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the present utility model more apparent, the embodiments of the present utility model will be described in further detail with reference to the accompanying drawings. Examples of the embodiments are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements throughout, or elements having like or similar functionality. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.

In the description of the present specification, the terms "embodiment," "present embodiment," "in one embodiment," and the like, if used, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples; furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

In the description of the present specification, the terms "connected," "mounted," "secured," "disposed," "having," and the like are to be construed broadly, e.g., as being either fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.

In the description of this specification, relational terms such as "first" and "second", and the like, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

In one embodiment, as shown in fig. 1, a defect detecting apparatus includes a mounting base, a detecting module 10 and a loading and unloading module 30, where the detecting module 10 and the loading and unloading module 30 are both disposed on the mounting base. The inspection module 10 includes a circulation assembly 40 and a plurality of inspection stations, wherein the inspection stations respectively inspect different defects, and the circulation assembly 40 drives inspection products to circulate among the inspection stations. At least one detection station is provided with a rotating mechanism 20, and the rotating mechanism 20 drives the detection product to rotate. An interface is provided between the loading and unloading module 30 and the inspection station and/or the flow assembly 40, and forces the inspection product into and out of the inspection module 10 at the interface.

Taking the detection of the defects of the electronic cigarette case as an example, as shown in fig. 1, 2 and 5, the circulation assembly 40 includes a first slide rail 41 and a picking and placing mechanism 42, where the picking and placing mechanism 42 is slidably connected to the first slide rail 41, and the picking and placing mechanism 42 is used for picking and placing the case. The sliding path of the pick-and-place mechanism 42 along which the first slide rail 41 slides passes through at least all the inspection stations of the inspection module 10. The detection module 10 comprises a first detection station 11, a second detection station 12 and a third detection station 13 which are sequentially arranged at intervals.

When in use, the loading and unloading module 30 is used for placing the shell to be detected into the first detection station 11 of the detection module 10 for detection; after the first detection station 11 completes detection, the circulation assembly 40 moves the shell from the first detection station 11 to the second detection station 12 for detection; after the second detection station 12 completes detection, the circulation assembly 40 moves the detection station to the third detection station 13 for detection; after the third detection station 13 completes detection, according to the detection results of the three detection stations, the loading and unloading module 30 puts the shell after detection into a corresponding qualified area or a reject area according to whether the shell is qualified or not.

The detection equipment of the embodiment fully utilizes the automatic detection of the detection stations, is not interfered by subjective factors of workers, has relatively high detection accuracy, and simultaneously saves manpower. In addition, all detection processes of the detection device of the embodiment utilize each module to automatically detect, compared with the detection time consuming for manually detecting one shell for 30 seconds, the detection device of the embodiment can shorten the detection time of one shell to be within 10 seconds, the detection efficiency is high, and the detection cost is reduced.

In the three detection stations for detecting defects of different shells, the rotating mechanism 20 is arranged at the corresponding detection stations according to actual detection requirements, for example, when defects such as art lines, groove lines, threads in holes and groove depths are detected, the defects are in different positions of the shells, so that the rotating mechanism 20 is required to rotate the shells to different angles and take photos for multiple times to determine all the defects, on one hand, the arrangement of the rotating mechanism 20 can complete the comprehensive detection of the defects, on the other hand, only a small number of stations are required, a small number of cameras are required to take photos for multiple times to confirm the defect conditions, the number of cameras is reduced, and the hardware cost is reduced.

In other embodiments, the circulation assembly 40 may include multiple sets of pick-and-place mechanisms 42, and after the first shell to be inspected completes the inspection at the first inspection station 11 and is moved to the second inspection station 12, the loading and unloading module 30 may place the second shell to be inspected into the first inspection station 11 for inspection; after the first shell to be detected completes the detection of the second detection station 12 and is moved to the third detection station 13, the second shell to be detected which completes the detection of the first detection station 11 is moved to the second detection station 12 for detection; and the following steps are the same. The multiple groups of picking and placing mechanisms 42 can enable the three groups of detection stations to be in a continuous working state, so that the detection efficiency of the detection equipment is further improved, and the detection time is saved.

In other embodiments, one, two or more groups of inspection stations may be provided according to the actual inspection requirements, and the rotation mechanism 20 is disposed at the station where defects are required to be photographed at multiple angles. Wherein, a reserved detection station can be further arranged, and the newly increased detection requirement of the client can be detected by using a certain detection station or the reserved detection station in the embodiment. For example, customer newly added hole size detection may be accomplished using the third detection station 13.

In one embodiment, the first inspection station 11 includes a first fixture for securing the housing, a first illumination assembly, and a first imaging assembly. The rotation mechanism 20 is disposed on the first detecting station 11 and is used for driving the first fixing member to rotate. The illumination range of the first illumination assembly includes an upper surface of the first fixture and at least one first side, and the imaging range of the first imaging assembly includes the upper surface of the first fixture and the first side.

Specifically, the first illumination assembly comprises an annular light source, a pair of first surface light sources, and the first imaging assembly comprises four first cameras. The first fixing piece is used for fixing the shell, the annular light source is arranged right above the first fixing piece, a pair of first light sources are arranged on the side face of the first fixing piece at intervals, and the included angles between the pair of first light sources and the connecting line of the first fixing piece are acute angles. The annular light source and the illumination directions of the pair of first surface light sources face the first fixing piece. One first camera is disposed between a pair of first-face light sources, and the remaining three first cameras are disposed along the circumferential direction of the annular light source. The lenses of the four first cameras are opposite to the first fixing piece.

The first detection station 11 is mainly used for detecting defects such as top threads, hole hemming and structural crushing, and when the device is used, the upper and lower material feeding module 30 feeds the shell to the first fixing piece of the first detection station 11, the four first cameras shoot the shell of the first fixing piece under the illumination of the annular light source and the pair of first surface light sources, then the rotating mechanism 20 rotates the first fixing piece, the shell on the first fixing piece is rotated by a certain angle, and then the four first cameras shoot again. After the rotation mechanism 20 rotates for a plurality of times and the photographing by the four first cameras for a plurality of times, the detection process of the first detection station 11 is completed. The rotation mechanism 20 can drive the first fixing member to rotate one hundred twenty degrees each time, and the omni-directional photographing of the housing can be completed through two rotations. In other embodiments, four or more first cameras may be provided in the circumferential direction of the ring-shaped light source, and the rotation mechanism 20 may change the rotation angle each time according to the number of the first cameras and the photographing range.

In one embodiment, the second inspection station 12 includes a second illumination assembly, a second imaging assembly, and a second fixture for securing the housing. The illumination range of the second illumination assembly includes a second side of the second fixture, and the imaging range of the second imaging assembly includes a second side and a third side of the second fixture, the second side and the third side being on opposite sides of the second fixture.

Specifically, the second illumination assembly includes a second area light source and the second imaging assembly includes two second cameras. The second surface light source is arranged on one side of the second fixing piece, the middle of the second surface light source is provided with a through hole, and the illumination direction of the second surface light source faces the second fixing piece. The two second cameras are arranged on two opposite sides of the second fixing piece, one of the second cameras is arranged on one side, far away from the second fixing piece, of the second surface light source and faces the through hole, lenses of the two second cameras face towards the second fixing piece, and accordingly the two second cameras can respectively photograph the front face and the back face of the shell, and defects of the shell in the aspects of overall size, line arrangement groove milling and the like are obtained. Because the second inspection station 12 primarily inspects the front and back of the housing for defects, the second fixture need not be rotated and therefore the rotation mechanism 20 need not be provided.

In one embodiment, the third inspection station 13 includes a third fixture for securing the housing, a third illumination assembly, and a third imaging assembly. The rotation mechanism 20 is provided on the third detecting station 13 and is used for driving the third fixing member to rotate. The illumination range of the third illumination assembly includes all sides of the third fixture, and the imaging range of the third imaging assembly includes a fourth side of the third fixture.

Specifically, the third illumination assembly includes three strip light sources and the third imaging assembly includes a third camera. The three strip-shaped light sources are arranged on the periphery of the third fixing piece at intervals, and the illumination directions of the three strip-shaped light sources face the third fixing piece. The third camera is arranged between the two strip-shaped light sources, and the lens of the third camera faces the third fixing piece. The third detection station 13 is mainly used for detecting defects of art lines, groove lines, few milling, threads in holes, groove depth and the like of the outer shell, and the rotation mechanism 20 is required to rotate the third fixing piece for multiple times during detection so that all defects on the peripheral side of the third outer shell can be shot by the third camera.

In one embodiment, the first detecting station 11, the second detecting station 12 and the third detecting station 13 are sequentially arranged at intervals along a straight line, and the first sliding rail 41 of the circulation assembly 40 is arranged as a straight sliding rail and faces the three detecting stations. The circulation of material is realized through the parallel moving of circulation subassembly 40 between the three detection stations, and each light source, the camera of three detection stations all keep in fixed position, only need to utilize rotary mechanism 20 to drive first mounting and third mounting and rotate, need not the arm multi-angle removal electron cigarette shell, need not complicated electron cigarette shell positioner, and equipment is simple, easy operation. The three detection stations respectively detect different positions of the shell and jointly detect one shell, so that the requirement of full detection of the shell of the electronic cigarette is met, and various defect detection of the shell of the electronic cigarette can be met. The rotation of the product by the mechanical arm requires a longer time and more precise operation than the rotating mechanism 20 of the present utility model, so that the detection device of the present embodiment has higher detection efficiency.

In other embodiments, the detection stations with different numbers and types can be arranged and combined according to the defect types of the actual product to be detected, and the positions and the numbers of the illumination assemblies and the imaging assemblies are set according to the actual appearance structure of the product to be detected, so that the requirement on the full detection of the defects of the product is met.

In one embodiment, as shown in fig. 3, the rotating mechanism 20 includes a turntable 21 and a rotating driving member 22 drivingly connected to the turntable 21, where the turntable 21 is fixed directly under the first fixing member/third fixing member, and the first fixing member/third fixing member rotates around its axis along with the turntable 21 under the driving of the rotating driving member 22, so that each surface of the housing can be placed in the shooting range of the first camera/third camera, complete inspection of the housing, and no additional inspection station is required, so that hardware including but not limited to a camera, a lens, a light source, etc. is not required, the total cost of the hardware is reduced, and the full-direction defect inspection of the housing is satisfied. The rotation driving member 22 may be driven by a rotation motor, or may be driven by a worm wheel, a worm and a coupling in combination with a motor. In other embodiments, the product to be detected may be directly fixed on the turntable 21, for example, a mounting hole is formed on the turntable 21 for inserting the product to be detected.

In one embodiment, the first camera/the second camera/the third camera is an industrial camera provided with an industrial lens, and the annular light source/the first surface light source/the second surface light source/the strip light source is an industrial light source. Compared with a common camera, the industrial camera has high resolution, high frame rate, high resolution, large depth of field and small distortion, and the industrial lens has high brightness, high directivity uniformity and high stability, compared with a common light source, and the camera, the lens and the light source in the embodiment are matched for use, so that the industrial camera has higher efficiency and higher stability.

In one embodiment, further comprising a housing bin 50, as shown in fig. 4, the loading and unloading module 30 comprises a gantry 31 and a clamping jaw 32 slidably arranged on the gantry 31, the clamping jaw 32 loading the housing on the housing bin 50 to the first inspection station 11 and unloading the housing on the third inspection station 13. Specifically, the portal frame 31 includes a sliding driving member, two second sliding rails and three parallel third sliding rails, the two second sliding rails are respectively connected with two adjacent third sliding rails in a sliding manner, and the pair of clamping jaws 32 are respectively connected with one of the second sliding rails in a sliding manner. The two second sliding rails can slide along the two corresponding third sliding rails respectively under the driving of the sliding driving piece, and the two clamping jaws 32 can slide along the corresponding second sliding rails respectively. The housing bin 50 is disposed between the outermost two third slide rails, so that two clamping jaws 32 can load and unload any housing within the housing bin 50.

Further, two third slide rails on the outermost side are respectively close to the first detection station 11 and the third detection station 13, so that the first detection station 11 is subjected to shell feeding, the third detection station 13 is subjected to shell discharging, and the automation degree of the equipment is guaranteed.

In other embodiments, the feeding and discharging module 30 may be provided with a connection position between two or more detecting stations, and the feeding and discharging module 30 will detect the flow of the product into/out of the different detecting stations at the connection position. The feeding and discharging module 30 can also directly carry out the product delivery with the circulation assembly 40, the feeding and discharging module 30 can transfer the product to the taking and placing mechanism 42 of the circulation assembly 40, the taking and placing mechanism 42 can transfer the product to different positioning detection stations for defect detection, and the product after the defect detection can also forbid the circulation assembly 40 to be delivered to the feeding and discharging module 30.

In one embodiment, the electronic cigarette case defect detection device further comprises a case body, the case body is matched with the mounting seat to cover all the detection module 10, the rotating mechanism 20, the feeding and discharging module 30, the rotating assembly 40 and the case bin 50, and the whole case defect detection process is carried out in the case body, so that dust can be prevented from polluting the electronic cigarette case. Inside depth of box, each module all sets up around the box, all sets up the door plant around the box, and the door plant can be opened so that operating personnel to each module dismouting maintenance.

The embodiments have been described so as to facilitate a person of ordinary skill in the art in order to understand and apply the present technology, it will be apparent to those skilled in the art that various modifications may be made to these examples and that the general principles described herein may be applied to other embodiments without undue burden. Therefore, the present application is not limited to the above embodiments, and modifications to the following cases should be within the scope of protection of the present application: (1) the technical scheme of the utility model is taken as the basis and combined with the new technical scheme implemented by the prior common general knowledge, and the technical effect produced by the new technical scheme is not beyond that of the utility model; (2) equivalent replacement of part of the characteristics of the technical scheme of the utility model by adopting the known technology produces the technical effect the same as that of the utility model; (3) the technical scheme of the utility model is taken as a basis for expanding, and the essence of the expanded technical scheme is not beyond the technical scheme of the utility model; (4) equivalent transformation made by the content of the specification and the drawings of the utility model is directly or indirectly applied to other related technical fields.

Claims (8)

1. The defect detection equipment comprises a mounting seat and is characterized by further comprising a mounting seat arranged on the mounting seat:

the detection module comprises a circulation assembly and a plurality of detection stations for detecting different defects, the circulation assembly drives detection products to circulate among the detection stations, a rotating mechanism is arranged on the detection stations and comprises a plurality of turntables capable of rotating along the axes of the turntables, the detection products are fixed on the turntables, the turntables drive the detection products to rotate, and the turntables are respectively arranged on the different detection stations;

and a connecting position is arranged between the feeding and discharging module and the detection station and/or the circulation assembly, and the detection product is driven to flow into and flow out of the detection module at the connecting position.

2. The defect inspection apparatus of claim 1, wherein the inspection module comprises a first inspection station, the rotation mechanism disposed on the first inspection station, the first inspection station comprising a first illumination assembly and a first imaging assembly; the illumination range of the first illumination assembly includes an upper surface and at least one first side of the turntable, and the imaging range of the first imaging assembly includes an upper surface and a first side of the turntable.

3. The defect inspection apparatus of claim 2 wherein the first illumination assembly comprises an annular light source and a first surface light source both having an illumination direction toward the turntable, the first surface light source being disposed laterally of the turntable and having an illumination direction toward the first side of the turntable; the annular light source is arranged above the turntable, and the illumination direction of the annular light source faces the upper surface of the turntable.

4. The defect inspection apparatus of claim 3 wherein said first imaging assembly comprises a plurality of first cameras each having a lens oriented toward said turntable, one of said first cameras being disposed laterally of said turntable and having a lens oriented toward a first side of said turntable; at least one first camera is arranged above the turntable, and the lens of the first camera faces to the upper surface of the turntable.

5. The defect inspection apparatus of claim 1, wherein the inspection module further comprises a second inspection station comprising a second illumination assembly, a second imaging assembly and a second fixture for securing the inspection product, wherein the illumination field of the second illumination assembly comprises a second side of the second fixture, wherein the imaging field of the second imaging assembly comprises a second side and a third side of the second fixture, wherein the second side and the third side are on opposite sides of the second fixture.

6. The defect inspection apparatus of claim 5, wherein the second illumination assembly comprises a second surface light source with a through hole in the middle, the second surface light source being disposed laterally of the second fixture with its illumination direction facing the second side of the second fixture;

the second imaging assembly comprises two second imaging devices which are arranged on the side of the second fixing piece, wherein the lens of one second imaging device faces the through hole of the second surface light source and faces the second side face of the second fixing piece, and the lens of the other second imaging device faces the third side face of the second fixing piece.

7. The defect inspection apparatus of claim 1, wherein the inspection module further comprises a third inspection station, the rotation mechanism disposed on the third inspection station, the third inspection station comprising a third illumination assembly and a third imaging assembly, the illumination range of the third illumination assembly comprising the entire side of the turntable, the imaging range of the third imaging assembly comprising the fourth side of the turntable.

8. The defect inspection apparatus of claim 7, wherein the third illumination assembly is uniformly distributed on the plurality of strip-shaped light sources on the periphery of the turntable, and the illumination directions of the plurality of strip-shaped light sources are opposite to the turntable; the third imaging component comprises a third imaging device arranged on one side of the turntable, and the lens of the dead third imaging device faces to the fourth side face of the turntable.