3D printing equipment

Abstract

The utility model discloses 3D printing equipment. The 3D printing equipment comprises a tool head, a hot bed and a visual recognition device. The tool head comprises a shell and a hot end assembly, and the hot end assembly is installed on the shell. The tool head and the hot bed are configured to be relatively movable. The visual identification device is connected with the shell and comprises a camera module and a light-emitting module, and a lens of the camera module faces the hot bed; the light-emitting module is obliquely arranged, and an acute angle is formed between the center line of the view field range of the light-emitting module and the center line of the view field range of the camera module. Thus, the camera module can shoot the printed piece in real time, and the light emitting module can supplement light to the printed piece in the shooting process, so that the obtained image more truly reflects the printing quality of the printed piece, the 3D printing equipment can be adjusted according to the printing quality, and the printing effect of the 3D printing equipment can be improved conveniently.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of 3D printing, and more particularly, to a 3D printing device. BACKGROUND

[0002] The printing effect of a 3D printing device is crucial to the 3D printing device, and therefore how to accurately detect the printing effect of the 3D printing device so as to adjust the 3D printing device becomes a problem to be solved. SUMMARY

[0003] The present application provides a 3D printing device.

[0004] The 3D printing device provided by the present application includes a tool head, a hot bed and a visual recognition device. The tool head includes a shell and a hot end assembly, and the hot end assembly is installed on the shell. The tool head and the hot bed are configured to be relatively movable. The visual recognition device is connected with the shell, and the visual recognition device includes a camera module and a light-emitting module. The lens of the camera module is directed towards the hot bed. The light-emitting module is obliquely arranged, and the center line of the field of view range of the light-emitting module and the center line of the field of view range of the camera module form an acute angle.

[0005] In some embodiments, both the field of view range of the camera module and the field of view range of the light-emitting module fall on the hot bed.

[0006] In some embodiments, the center line of the field of view range of the camera module forms a first center point on the hot bed, and the center line of the field of view range of the light-emitting module forms a second center point on the hot bed. The distance between the first center point and the second center point is less than a preset distance threshold.

[0007] In some embodiments, the light spot formed by the light-emitting module on the hot bed is located outside the field of view range of the camera module.

[0008] In some embodiments, the visual recognition device further includes a housing, and the housing is installed on the shell. A bottom plate of the housing is provided with a first through hole and a second through hole, and the first through hole and the second through hole are arranged opposite to the hot bed. The camera module and the light-emitting module are installed on the bottom plate. The light inlet of the camera module is located at the first through hole, and the light outlet of the light-emitting module is located at the second through hole. The center line of the field of view range of the light-emitting module and the center axis of the first through hole form an acute angle.

[0009] In some embodiments, the housing includes a first shell and a second shell, and the first shell and the second shell are detachably connected. The camera module and the light-emitting module are installed on the bottom plate of the second shell.

[0010] In some embodiments, the light emitting module comprises a light emitting unit, the bottom plate is provided with a second through hole and a fixing portion extending from the edge of the second through hole to the direction away from the bottom plate and inclined to the second through hole, and the light emitting unit passes through the fixing portion.

[0011] In some embodiments, the central axis of the fixing portion is parallel to the optical axis of the light emitting unit, and the central axis of the fixing portion is arranged obliquely relative to the bottom plate.

[0012] In some embodiments, the fixing portion is in interference fit with the light emitting unit.

[0013] In some embodiments, the camera module comprises a first circuit board, the light emitting module comprises a second circuit board, and the tool head comprises a third circuit board, and the first circuit board is connected with the second circuit board and the third circuit board respectively.

[0014] In some embodiments, the distance between the camera module and the hot end assembly is less than the distance between the light emitting module and the hot end assembly.

[0015] In the 3D printing device of the present application, the tool head is integrated with a visual recognition device, and the visual recognition device is connected with the shell of the tool head. The visual recognition device comprises a camera module and a light emitting module, and the center line of the field of view range of the light emitting module and the center line of the field of view range of the camera module form an acute angle, so that the light emitting module can supplement light for the printed part. At the same time, the tool head can drive the hot end assembly and the visual recognition device to move to different positions of the hot bed. In this way, when the hot end assembly extrudes the printing material at different positions of the hot bed to form the printed part, the camera module can capture the printed part in real time, and the light emitting module can supplement light for the printed part during the capturing process, so that the image captured by the camera module can more truly reflect the printing quality of the printed part, so as to facilitate the 3D printing device to accurately judge the printing quality of the printed part or calibrate some moving parts (such as the nozzle in the hot end or the tool head) of the 3D printing device in time, and the printing process of the 3D printing device can be adjusted when the printing quality is poor, thereby facilitating to improve the printing effect of the 3D printing device.

[0016] Additional aspects and advantages of the embodiments of the present application will be in part apparent and in part pointed out hereinafter in the description of the embodiments of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0017] The above and / or additional aspects and advantages of the present application will become apparent and be readily appreciated from the description of the embodiments, taken in conjunction with the following drawings in which:

[0018] Figure 1is a schematic plan view of a 3D printing device according to some embodiments of the present application;

[0019] Figure 2 is Figure 1 a schematic plan view of a 3D printing device according to some embodiments of the present application;

[0020] Figure 3 is Figure 1 a schematic plan view of a vision recognition device in a 3D printing device according to some embodiments of the present application;

[0021] Figure 4 is Figure 1 a schematic perspective view of a partial structure of a vision recognition device in a 3D printing device according to some embodiments of the present application;

[0022] Figure 5 is Figure 4 a schematic plan view of another angle of a partial structure of a vision recognition device according to some embodiments of the present application.

[0023] Main element symbol explanation:

[0024] 100, 3D printing device;

[0025] 10, tool head; 11, housing; 12, hot end assembly;

[0026] 20, hot bed;

[0027] 30, vision recognition device; 31, camera module; 310, field of view range; 311, first circuit board; 32, light emitting module; 320, field of view range; 321, light emitting unit; 322, second circuit board; 33, shell; 331, bottom plate; 3311, first through hole; 3312, second through hole; 3313, fixed part; 332, first housing; 333, second housing;

[0028] 40, cross rod; 50, lifting device; S1, first center point; S2, second center point; L1, center line of field of view range 310; L2, center line of field of view range 320. DETAILED DESCRIPTION

[0029] The embodiments of the present application are described in detail below with reference to the accompanying drawings. Examples of the embodiments of the present application are shown in the drawings, in which the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by reference to the drawings are exemplary and are used only to explain the embodiments of the present application, and cannot be understood as limiting the embodiments of the present application.

[0030] In the description of the application, it should be understood that the terms "thickness", "upper", "top", "bottom", "inner", "outer", etc. indicate the orientation or positional relationship shown in the drawings, which are only for the purpose of facilitating the description of the application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the application. In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first", "second" can explicitly or implicitly include one or more features. In the description of the application, the meaning of "multiple" is two or more, unless otherwise explicitly specified and limited.

[0031] In the description of the application, it should be noted that, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting" should be understood in a broad sense. In one example, it can be a fixed connection, or a detachable connection, or an integral connection; it can be a mechanical connection, or an electrical connection, or it can communicate with each other; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal communication or interaction relationship of two elements.

[0032] In the embodiments of the application, the "upper" or "lower" of the first feature to the second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the "upper", "upper" and "upper" of the first feature to the second feature include that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The "below", "below" and "below" of the first feature to the second feature include that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0033] Please refer to Figure 1 、 Figure 2 、 Figure 4 And Figure 5 , the 3D printing equipment 100 provided by the embodiments of the application includes a tool head 10, a hot bed 20 and a visual recognition device 30. The tool head 10 includes a shell 11 and a hot end assembly 12, the hot end assembly 12 is installed on the shell 11, and the tool head 10 is configured to move relative to the hot bed 20. The visual recognition device 30 is connected with the shell 11, the visual recognition device 30 includes a camera module 31 and a light emitting module 32, the lens of the camera module 31 faces the hot bed 20; the light emitting module 32 is obliquely arranged, and the center line L2 of the field of view range 320 of the light emitting module 32 and the center line L1 of the field of view range 310 of the camera module 31 form an acute angle.

[0034] Specifically, the 3D printing device 100, also known as a three-dimensional printing device, is a manufacturing device that uses a layer-by-layer accumulation method to accumulate materials to form a three-dimensional entity. Its working principle can be briefly described as follows: using special materials, through a precisely controlled nozzle or other means, according to the preset three-dimensional model data, the materials are accumulated layer by layer, and finally the three-dimensional entity prototype of the object is constructed.

[0035] The tool head 10 is generally used in a printing device and is a key component in the printing device, which is used to color or transfer data such as text and images on paper or other media. The tool head 10 is used to output printing materials according to a target image to generate a printed piece. The tool head 10 includes a housing 11, an extrusion assembly, a hot end assembly 12, and a material tube. The extrusion assembly and the hot end assembly 12 are both mounted to the housing 11. The housing 11 is the external structure of the tool head 10, mainly serving to protect the internal components, dissipate heat, and provide structural support. The hot end assembly 12 and the extrusion assembly are both mounted to the housing 11. The housing 11 is usually made of a material with good heat dissipation performance, such as aluminum or copper, and can have heat dissipation fins to enhance heat dissipation. The material tube is a pipeline for printing materials in the tool head 10. The material tube is responsible for maintaining a continuous supply of printing materials and ensuring the stability and continuity of the printing process. The printing device can include a feeding assembly for providing printing materials to the material tube. The material tube is provided in the extrusion assembly, which is used to drive the printing materials in the material tube to move to the hot end assembly 12. The hot end assembly 12 is provided with a heating element that can heat the printing materials and output the printing materials to form a printed piece, thereby completing the printing.

[0036] The hot bed 20 is a support component of the 3D printing device 100, which is responsible for providing a stable, solid, and level platform for the printed piece printed by the tool head 10 to adhere stably. The hot bed 20 generally has a heating function to improve the adhesion of the material and prevent deformation.

[0037] The visual recognition device 30 is a device capable of capturing images of target objects. The visual recognition device 30 is connected to the housing 11. In one embodiment, the visual recognition device 30 is directly mounted to the housing 11, for example, by using screws to mount the visual recognition device 30 to the housing 11. And the visual recognition device 30 is arranged close to the hot end assembly 12 to ensure that the visual recognition device 30 can shoot the printing materials extruded by the hot end assembly 12. In another embodiment, the visual recognition device 30 can be hung on the housing 11, and the visual recognition device 30 is arranged close to the hot end assembly 12 to ensure that the visual recognition device 30 can shoot the printing materials extruded by the hot end assembly 12.

[0038] The visual recognition device 30 comprises a camera module 31 and a light-emitting module 32. The camera module 31 is a device that forms an image of a target object by using the principle of optical imaging and records the image. The light-emitting module 32 can emit light when powered.

[0039] The lens of the camera module 31 is directed towards the hot bed 20, so that the camera module 31 can capture images of the printing material extruded by the hot end assembly 12 at different positions of the hot bed 20. Meanwhile, the light-emitting module 32 is arranged obliquely, and the center line of the field of view range 320 of the light-emitting module 32 forms an acute angle with the center line L1 of the field of view range 310 of the camera module 31, so that the field of view range 320 of the light-emitting module 32 and the field of view range 310 of the camera module 31 at least partially overlap, ensuring that the light-emitting module 32 can provide supplementary light for the field of view range 310 of the camera module 31. The field of view range 310 of the camera module 31 refers to the maximum range that can be captured by the camera module 31 on the hot bed 20, that is, the effective working area covered by the camera module 31 on the hot bed 20. The field of view range 320 of the light-emitting module 32 refers to the area range illuminated by the light emitted by the light-emitting module 32 on the hot bed 20. After the light is emitted from the light-emitting module 32, it is incident on the object to be photographed at a certain oblique angle, and the lens of the camera module 31 captures the image of the object to be photographed at another oblique angle. In this way, the light-emitting module 32 can provide supplementary light for at least part of the shooting area of the camera module 31.

[0040] In some embodiments, the field of view range 310 of the camera module 31 and the field of view range 320 of the light-emitting module 32 both fall within the hot bed 20. The field of view range 310 of the camera module 31 and the field of view range 320 of the light-emitting module 32 both fall within the hot bed 20, and by moving the visual recognition device 30, the field of view range 310 of the camera module 31 and the field of view range 320 of the light-emitting module 32 can cover the entire area of the hot bed 20. Therefore, the camera module 31 can capture the hot bed 20, and the light-emitting module 32 can provide supplementary light for the hot bed 20 during the capturing process.

[0041] Meanwhile, the tool head 10 and the hot bed 20 are configured to be movable relative to each other. For example, the 3D printing device 100 further comprises a cross bar 40 and a lifting device 50. The cross bar 40 extends in a direction parallel to the surface of the hot bed 20 towards the tool head 10, and the tool head 10 can move on the cross bar 40, so that the tool head 10 can perform translational motion relative to the hot bed 20. The lifting device 50 comprises a driving motor and a screw rod, and a sliding block is mounted on the screw rod. The hot bed 20 is connected to the sliding block, and the driving motor is connected to the screw rod and can drive the screw rod to rotate. The motor can drive the screw rod to rotate, thereby driving the sliding block to move in the vertical direction, and thereby driving the hot bed 20 to ascend or descend, so as to perform lifting motion relative to the tool head 10.

[0042] Before printing, the hot bed 20 or the tool head 10 can be moved so that the field of view range 310 of the camera module 31 and the field of view range 320 of the light-emitting module 32 fall on the hot bed 20. During printing, the tool head 10 moves to different positions of the hot bed 20 for printing. At this time, the tool head 10 can drive the hot end assembly 12 and the visual recognition device 30 to move to different positions of the hot bed 20, so that the hot end assembly 12 can print at different positions of the hot bed 20. Since the visual recognition device 30 is connected to the tool head 10, and the optical axis of the light-emitting module 32 and the optical axis of the camera module 31 form an acute angle, at least the currently extruded printing material of the hot end assembly 12 can be covered in the field of view range 310 of the camera module 31 and the field of view range 320 of the light-emitting module 32. At this time, the light-emitting module 32 can provide real-time light compensation for the currently extruded printing material of the hot end assembly 12, and the camera module 31 can collect the currently extruded printing material of the hot end assembly 12 in a relatively sufficient light environment. Thus, the camera module 31 can collect images of the printing material extruded by the hot end assembly 12 at different positions of the hot bed 20 in a relatively sufficient light environment, so that the images captured by the camera module 31 can more truly reflect the actual situation of the printed part on the hot bed 20. In this way, the camera module 31 can quickly obtain images that can more truly reflect the printing quality of the printed part, so as to facilitate the 3D printing equipment 100 to accurately judge the printing quality of the printed part in a timely manner, and adjust the printing process when the printing quality is poor, thereby facilitating to improve the printing effect of the 3D printing equipment 100.

[0043] The tool head 10 of the 3D printing equipment 100 of the embodiment of the present application is integrated with the visual recognition device 30, and the visual recognition device 30 is connected to the shell 11 of the tool head 10. The visual recognition device 30 includes the camera module 31 and the light-emitting module 32, and the center line of the field of view range 320 of the light-emitting module 32 and the center line L1 of the field of view range 310 of the camera module 31 form an acute angle, so that the light-emitting module 32 can provide light compensation for the printed part. At the same time, the tool head 10 can drive the hot end assembly 12 and the visual recognition device 30 to move to different positions of the hot bed 20. In this way, when the hot end assembly 12 extrudes printing material at different positions of the hot bed 20 to form a printed part, the camera module 31 can capture the printed part in real time, and the light-emitting module 32 can provide light compensation for the printed part during the capturing process, so that the images captured by the camera module 31 can more truly reflect the printing quality of the printed part or calibrate some moving parts (such as the nozzle in the hot end assembly 12 or the tool head 10) of the 3D printing equipment 100, thereby facilitating the 3D printing equipment 100 to accurately judge the printing quality of the printed part in a timely manner, and adjust the printing process when the printing quality is poor, thereby facilitating to improve the printing effect of the 3D printing equipment 100.

[0044] Please refer to Figure 1、 Figure 4 and Figure 5 In some embodiments, a center line L1 of the field of view range 310 of the camera module 31 forms a first center point S1 on the hot bed 20, and a center line L2 of the field of view range 320 of the light-emitting module 32 forms a second center point S2 on the hot bed 20, and a distance between the first center point S1 and the second center point S2 is less than a preset distance threshold.

[0045] Specifically, the center line L1 of the field of view range 310 of the camera module 31 can reach the hot bed 20, and a place where the center line coincides with the hot bed 20 forms the first center point S1. The center line L2 of the field of view range 320 of the light-emitting module 32 can reach the hot bed 20, and a place where the center line coincides with the hot bed 20 forms the second center point S2. The preset distance threshold is the maximum distance between the first center point S1 and the second center point S2 when the light-emitting module 32 can well supplement the shooting range of the camera module 31.

[0046] When designing the visual recognition device 30, the angle between the optical axis of the camera module 31 and the optical axis of the light-emitting module 32 can be specially designed so that the distance between the first center point S1 and the second center point S2 is less than the preset distance threshold, and preferably, the first center point S1 and the second center point S2 coincide. In this way, the light supplementing effect of the light-emitting module 32 on the field of view range 310 of the camera module 31 can be better, the field of view of the camera module 31 is optimal, the shooting effect of the camera module 31 is better, and the image obtained by shooting can more realistically restore the situation of the printed matter.

[0047] Please refer to Figure 1 and Figure 4 In some embodiments, the light spot formed by the light-emitting module 32 on the hot bed 20 is located outside the field of view range 310 of the camera module 31.

[0048] Specifically, when the light-emitting module 32 emits light, a specific light spot can be formed. If the image shot by the camera module 31 contains the light spot, it can cause the image to be overexposed, thereby affecting the presentation effect of the image on the printed matter.

[0049] Therefore, when designing the visual recognition device 30, the distance between the light-emitting module 32 and the camera module 31 can be specially designed so that the light spot formed by the light-emitting module 32 on the hot bed 20 is located outside the field of view range 310 of the camera module 31. In this way, there is no light spot in the image shot by the camera module 31, which prevents the image from being overexposed, thereby ensuring that the image can more realistically reflect the printing quality of the printed matter.

[0050] Please refer to Figure 1 、 Figure 3 and Figure 5In some embodiments, the visual recognition device 30 further comprises a housing 33, the housing 33 is mounted on the shell 11, a bottom plate 331 of the housing 33 is provided with a first through hole 3311 and a second through hole 3312, the first through hole 3311 and the second through hole 3312 are arranged relative to the hot bed 20, the camera module 31 and the light-emitting module 32 are mounted on the bottom plate 331, the light inlet of the camera module 31 is located at the first through hole 3311, and the light outlet of the light-emitting module 32 is located at the second through hole 3312; a center line L2 of a field of view range 320 of the light-emitting module 32 and a center axis of the first through hole 3311 form an acute angle.

[0051] Specifically, the housing 33 is a structure with a cavity for accommodating other elements, and other elements (such as the camera module 31 and the light-emitting module 32) of the visual recognition device 30 can be mounted in the housing 33. The housing 33 can be used to block other elements of the visual recognition device 30 from the outside world to prevent the other elements from being easily damaged by external forces, and to prevent foreign matter such as dust from entering the other elements and affecting the normal work of the other elements.

[0052] The housing 33 is mounted on the shell 11, for example, the housing 33 can also be provided with a first mounting hole, and the shell 11 is provided with a second mounting hole. The first mounting hole and the second mounting hole can be connected by screws to enable the housing 33 to be stably mounted on the shell 11.

[0053] The camera module 31 and the light-emitting module 32 are both mounted on the bottom plate 331 of the housing 33, for example, the camera module 31 and the light-emitting module 32 are connected with the bottom plate 331 through detachable connection modes such as threaded connection, buckle connection and hinge connection, or the camera module 31 and the light-emitting module 32 are connected with the bottom plate 331 through non-detachable connection modes such as folding edge connection, rivet connection, adhesive connection and welding connection.

[0054] The bottom plate 331 of the housing 33 is provided with a first through hole 3311 and a second through hole 3312, and the first through hole 3311 and the second through hole 3312 are arranged relative to the hot bed 20, that is, the first through hole 3311 and the second through hole 3312 are directed towards the hot bed 20. The light inlet of the camera module 31 is located at the first through hole 3311, wherein the light inlet of the camera module 31 mainly refers to the camera lens, which is a key component in the camera module 31 for receiving external light and focusing it onto the sensor. The light reflected by the printed object can enter the light inlet of the camera module 31 through the first through hole 3311, so that the camera module 31 can generate an image corresponding to the printed object according to the received light. The light outlet of the light-emitting module 32 is located at the second through hole 3312 to ensure that the light emitted by the light-emitting module 32 can reach the hot bed 20 through the second through hole 3312, so that the light emitted by the light-emitting module 32 can smoothly supplement the light for the printed object on the hot bed 20.

[0055] Meanwhile, the center line L2 of the field of view range 320 of the light emitting module 32 forms an acute angle with the central axis of the first through hole 3311, so that the center line L2 of the field of view range 320 of the light emitting module 32 forms an acute angle with the center line L1 of the field of view range 310 of the camera module 31, so as to ensure that the light emitted by the light emitting module 32 can cover at least part of the range of the camera module 31, thereby ensuring that the light emitting module 32 can provide light for the shooting object of the camera module 31.

[0056] In this way, the visual recognition device 30 can protect the camera module 31 and the light emitting module 32 by the shell 33, and the first through hole 3311 and the second through hole 3312 are further arranged on the bottom plate 331 of the shell 33, so that the camera module 31 and the light emitting module 32 can be installed in the shell 33 and can also smoothly complete the corresponding work.

[0057] Please refer to Figure 3 and Figure 4 In some embodiments, the shell 33 includes a first shell 332 and a second shell 333, and the first shell 332 and the second shell 333 are detachably connected, and the detachable connection includes but is not limited to threaded connection, buckle connection and hinge connection, for example, the first shell 332 and the second shell 333 are fixed by three buckles. The camera module 31 and the light emitting module 32 are installed on the bottom plate 331 of the second shell 333, for example, the camera module 31 can be installed on the bottom plate 331 of the second shell 333 by gluing, and the light emitting module 32 can be installed on the bottom plate 331 of the second shell 333 by buckling.

[0058] In this way, after the camera module 31 and the light emitting module 32 are installed on the bottom plate 331 of the second shell 333, the first shell 332 and the second shell 333 can be connected, so as to complete the assembly of the visual recognition device 30. Meanwhile, the detachable connection of the first shell 332 and the second shell 333 also facilitates the maintenance or replacement of the camera module 31 or the light emitting module 32 when the camera module 31 or the light emitting module 32 fails.

[0059] Please refer to Figure 2 and Figure 5 In some embodiments, the light emitting module 32 includes a light emitting unit 321, and the light emitting unit 321 is usually made of semiconductor materials such as silicon and gallium arsenide, and the light emitting unit 321 can emit light when powered.

[0060] The bottom plate 331 is provided with a second through hole 3312 and a fixing portion 3313 extending from the edge of the second through hole 3312 to the direction away from the bottom plate 331 and inclined to the second through hole 3312, so that the second through hole 3312 is connected with the fixing portion 3313, while ensuring that after the light emitting unit 321 is installed to the fixing portion 3313, the optical axis of the light emitting unit 321 is inclined to the center axis of the first through hole 3311, so that the optical axis of the light emitting unit 321 and the center line L1 of the field of view range 310 of the camera module 31 form an acute angle, so as to ensure that the center line L2 of the field of view range 320 of the light emitting module 32 and the center line L1 of the field of view range 310 of the camera module 31 form an acute angle. Wherein, in an ideal case, the center line L2 of the field of view range 320 of the light emitting module 32 coincides with the optical axis of the light emitting unit 321.

[0061] The fixing portion 3313 can only extend to the direction away from the bottom plate 331 along part of the edge of the second through hole 3312, at this time the fixing portion 3313 is only connected with part of the edge of the second through hole 3312, or the fixing portion 3313 can extend to the direction away from the bottom plate 331 along the entire edge of the second through hole 3312, at this time the fixing portion 3313 is connected with the entire edge of the second through hole 3312.

[0062] The light emitting unit 321 also extends to the direction away from the bottom plate 331 as a whole, so that after the light emitting unit 321 is inserted into the fixing portion 3313, the fixing portion 3313 can surround at least part of the light emitting unit 321. At the same time, the position between the fixing portion 3313 and the second through hole 3312 is fixed, so that after the light emitting unit 321 is installed in the fixing portion 3313, the fixing portion 3313 can limit the movement of the light emitting unit 321. At this time, the diameter of the light emitting unit 321 can be equal to or greater than the diameter of the fixing portion 3313, so that the light emitting unit 321 is in sufficient contact with the fixing portion 3313, thereby improving the fixing effect of the fixing portion 3313 on the light emitting unit 321.

[0063] Thus, the bottom plate 331 can further be provided with a fixing portion 3313 extending from the edge of the second through hole 3312 to a direction away from the bottom plate 331 and inclined to the second through hole 3312, so that the fixing portion 3313 can surround at least part of the light emitting unit 321, thereby limiting the movement of the light emitting unit 321 and ensuring that the light emitting unit 321 does not shake during the movement of the tool head 10, thereby ensuring the light compensation effect of the light emitting unit 321 on the printed object. At the same time, it can also be ensured that after the light emitting unit 321 is installed to the fixing portion 3313, the optical axis of the light emitting unit 321 is inclined to the center axis of the first through hole 3311, so that the optical axis of the light emitting unit 321 forms an acute angle with the center line L1 of the field of view range 310 of the camera module 31, to ensure that the center line L2 of the field of view range 320 of the light emitting module 32 forms an acute angle with the center line L1 of the field of view range 310 of the camera module 31.

[0064] Referring to Figure 5 In some embodiments, the center axis of the fixing portion 3313 is parallel to the optical axis of the light emitting unit 321, and the center axis of the fixing portion 3313 is inclined to the bottom plate 331.

[0065] Specifically, the shape of the fixing portion 3313 is determined according to the shape of the light emitting unit 321, so that the fixing portion 3313 can well fit the surface of the light emitting unit 321, thereby improving the fixing effect of the fixing portion 3313. Therefore, after the light emitting unit 321 is installed to the fixing portion 3313, the center axis of the fixing portion 3313 is parallel to the optical axis of the light emitting unit 321. At this time, the center axis of the fixing portion 3313 can be inclined to the bottom plate 331, so that the center point of the field of view range 320 of the light emitting module 32 can be closer to the center point of the field of view range 310 of the camera module 31, thereby facilitating to improve the light compensation effect of the light emitting module 32.

[0066] For example, the angle between the center axis of the fixing portion 3313 and the bottom plate 331 can be determined according to the positional relationship between the camera module 31 and the light emitting module 32, so that the first center point S1 and the second center point S2 coincide, thereby improving the light compensation effect of the light emitting module 32 on the field of view range 310 of the camera module 31, making the shooting effect of the camera module 31 higher, and the image obtained by shooting more restores the situation of the printed object.

[0067] Referring to Figure 5 In some embodiments, the fixing portion 3313 is in interference fit with the light emitting unit 321, that is, the diameter of the fixing portion 3313 is smaller than the diameter of the light emitting unit 321, so as to reduce the gap between the fixing portion 3313 and the light emitting unit 321 and improve the fixing effect of the fixing portion 3313 on the light emitting unit 321.

[0068] In the case that the hardness of the outer surface of the light emitting unit 321 is high and the outer surface of the light emitting unit 321 is difficult to deform, the diameter of the fixing portion 3313 can be slightly smaller than the diameter of the light emitting unit 321, i.e., the fixing portion 3313 is slightly interference-fitted with the light emitting unit 321. In this way, on the one hand, the light emitting unit 321 can be ensured to be installed into the fixing portion 3313, and on the other hand, the fixing effect of the fixing portion 3313 on the light emitting unit 321 is ensured.

[0069] Meanwhile, the fixing portion 3313 can only extend along a partial region of the edge of the second through hole 3312 in a direction away from the bottom plate 331, so that between the two ends of the fixing portion 3313, an opening is further formed along the extension direction of the edge of the second through hole 3312, and the light emitting unit 321 can enter the fixing portion 3313 from the opening, thereby facilitating the installation of the light emitting unit 321.

[0070] Please refer to Figure 2 and Figure 5 In some embodiments, the camera module 31 includes a first circuit board 311, the light emitting module 32 includes a second circuit board 322, and the tool head 10 includes a third circuit board (not shown in the figure), and the first circuit board 311 is connected with the second circuit board 322 and the third circuit board respectively.

[0071] Specifically, the circuit board generally contains important components such as processors, memories, interface chips, sensor control chips, etc., so the circuit board has control functions and communication functions.

[0072] The camera module 31 includes a camera lens and the first circuit board 311, the first circuit board 311 is connected with the camera lens, and the first circuit board 311 can be used to control the camera lens to take pictures of the printed matter, and then generate images corresponding to the printed matter, and at the same time, the first circuit board 311 can also be used to communicate with other elements, such as the light emitting module 32 or the tool head 10. The second circuit board 322 is connected with the light emitting unit 321, and the second circuit board 322 is used to control the light emitting unit 321 to work, and is used to communicate with other elements, such as the camera module 31 and the tool head 10. The third circuit board is connected with the extrusion assembly and the hot end assembly 12, and the third circuit board is used to control the extrusion assembly and the hot end assembly 12 to work, and is used to communicate with other elements, such as the camera module 31 and the light emitting module 32.

[0073] The first circuit board 311, the second circuit board 322 and the third circuit board can be flexible printed circuits (FPC) or printed circuit boards (PCB), and the specific configuration can be determined according to the actual needs. For example, in one embodiment, the first circuit board 311 is an FPC, the second circuit board 322 and the third circuit board are PCBs, and the shape of the first circuit board 311 can be determined according to the positions of the second circuit board 322 and the third circuit board, so as to ensure that the first circuit board 311 can reach the positions of the second circuit board 322 and the third circuit board, respectively. Generally, the cost of an FPC is higher than that of a PCB, so on the one hand, the first circuit board 311 can be connected to the second circuit board 322 and the third circuit board, and on the other hand, the cost of the circuit boards can be reduced as much as possible.

[0074] The first circuit board 311 is connected to the second circuit board 322 and the third circuit board, for example, the first circuit board 311 has two circuit board connection ends, respectively, and the two circuit board connection ends are connected to the second circuit board 322 and the third circuit board, respectively. In this way, signal transmission can be achieved between the first circuit board 311 and the second circuit board 322, between the first circuit board 311 and the third circuit board, and between the third circuit board and the second circuit board 322, that is, communication can be performed between any two of the light emitting module 32, the camera module 31 and the tool head 10, so as to facilitate the cooperation of the light emitting module 32, the camera module 31 and the tool head 10.

[0075] Meanwhile, the second circuit board 322 can communicate with the third circuit board through the first circuit board 311. Compared with the scheme in which the second circuit board 322 is not connected to the first circuit board 311 but is directly connected to the third circuit board, the second circuit board 322 is only connected to the first circuit board 311, which can reduce the length of the second circuit board 322, thereby reducing the space occupied by the second circuit board 322 and the cost thereof.

[0076] Please refer to Figure 2 and Figure 5In some embodiments, the distance between the camera module 31 and the hot end assembly 12 is smaller than the distance between the light-emitting module 32 and the hot end assembly 12. For example, the extending direction of the housing 33 of the visual recognition device 30 is the direction of the hot end assembly 12 towards the shell 11 of the tool head 10, the camera module 31 can be installed at a front position in the shell 11, and the light-emitting module 32 can be installed at a rear position in the shell 11, so that the camera module 31 is closer to the hot end assembly 12 than the light-emitting module 32. In this way, the distance between the camera module 31 and the hot end assembly 12 is small, which ensures that the camera module 31 can capture the printing material currently extruded by the hot end assembly 12, so that the 3D printing device 100 can determine the printing effect of the hot end assembly 12 in real time according to the image, and at the same time, it also ensures that the camera module 31 will not be blocked by other elements, so as to ensure that the camera can capture the printing material currently extruded by the hot end assembly 12 more completely.

[0077] In the description of the present specification, the description of the terms "certain embodiments", "one embodiment", "some embodiments", "illustrative embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiments or examples are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily mean the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0078] In addition, the terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, for example, two, three, unless otherwise specifically limited.

[0079] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limiting the present application, and those skilled in the art can make changes, modifications, replacements and variations to the above embodiments within the scope of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. A 3D printing device, characterized by The utility model relates to a tool head, a hot bed, a visual identification device and a tool head and a hot bed are configured to be relatively movable, a visual identification device is connected with the shell, the visual identification device includes camera module and light emitting module, the lens of camera module is towards the hot bed, the light emitting module is obliquely arranged, and the center line of the field of view range of the light emitting module and the center line of the field of view range of camera module form an acute angle. The field of view range of the camera module and the field of view range of the light emitting module are both in the hot bed. The center line of the field of view range of the camera module forms a first center point on the hot bed, and the center line of the field of view range of the light emitting module forms a second center point on the hot bed, and the distance between the first center point and the second center point is less than a preset distance threshold. The light spot formed by the light emitting module on the hot bed is located outside the field of view range of the camera module. The visual identification device further includes a housing mounted on the shell, a bottom plate of the housing is provided with a first through hole and a second through hole, the first through hole and the second through hole are arranged relative to the hot bed, the camera module and the light emitting module are mounted on the bottom plate, the light inlet of the camera module is located in the first through hole, and the light outlet of the light emitting module is located in the second through hole.

2. The 3D printing device of claim 1, wherein, The center line of the field of view range of the light emitting module and the center axis of the first through hole form an acute angle.

3. The 3D printing device of claim 1, wherein, The housing includes a first shell and a second shell, the first shell and the second shell are detachably connected, the camera module and the light emitting module are mounted on the bottom plate of the second shell.

4. The 3D printing device of claim 1, wherein, The light emitting module includes a light emitting unit, the bottom plate is provided with a second through hole and a fixing portion extending from the edge of the second through hole away from the bottom plate and inclined to the second through hole, and the light emitting unit passes through the fixing portion.

5. The 3D printing device of claim 1, wherein, The center axis of the fixing portion is parallel to the optical axis of the light emitting unit, and the center axis of the fixing portion is obliquely arranged relative to the bottom plate.

6. The 3D printing device of claim 5, wherein, The fixing portion and the light emitting unit are interference fit.

7. The 3D printing device of claim 6, wherein, The camera module includes a first circuit board, the light emitting module includes a second circuit board, the tool head includes a third circuit board, and the first circuit board is connected with the second circuit board and the third circuit board respectively.

8. The 3D printing device of claim 7, wherein, The distance between the camera module and the hot end assembly is less than the distance between the light emitting module and the hot end assembly.

9. The 3D printing device of claim 7, wherein, ​ 10. The 3D printing device of claim 1, wherein, ​ 11. The 3D printing device of claim 1, wherein, ​

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