Feeding device and 3D printer

Abstract

According to the feeding device and the 3D printer, a detection assembly is arranged on a feeding device body, feeding and liquid level detection are integrated, and the feeding device can move at the same time, is convenient to disassemble and assemble and is simple in structure. According to the main technical scheme, the feeding device comprises a feeding device body, the feeding device body comprises a feeding end and a discharging end, the feeding end is connected with a material bin, the discharging end is arranged opposite to a material groove, and the material bin is used for storing materials to be printed and used for being supplied to the material groove; the detection assembly is connected with the feeding device body and comprises a conductive part, a first electric signal is output when the conductive part makes contact with the to-be-cured material in the material groove, a second electric signal is output when the conductive part does not make contact with the to-be-cured material in the material groove, and the first electric signal is different from the second electric signal. The automatic feeding device is mainly used for automatic feeding.

Description

Technical Field

[0001] The utility model relates to the technical field of 3D printing, in particular to a feeding device and a 3D printer. Background Art

[0002] In a light-curing 3D printer, the material tank is filled with resin and placed on the printer's display screen. The light source is located on the side of the display screen opposite to the material tank. The material to be printed is placed in the material tank, and the printing platform is immersed in the material to be printed. The light beam of the light source is projected onto the display screen, and then the light passes through the pattern on the display screen to solidify the medium between the printing platform and the release film. Then the printing platform rises, and the resin flows back to the bottom of the formed model, and continues to solidify to achieve layer-by-layer stacking.

[0003] During the printing process, the material to be printed will be gradually consumed. In order to realize automatic printing, the prior art realizes the automatic addition of consumables by setting a liquid level detection component and a feeding component. For example, in the patent with publication number CN215849649U, the liquid level detection component is connected to the material tank to detect the liquid level of the material tank, and the liquid outlet of the liquid supply component is connected to the material tank through a switch valve. However, the liquid level detection component and the feeding component are arranged on both sides of the material tank, and the liquid level detection component and the feeding component occupy a large space for the material tank. When the material tank needs to be moved separately, the liquid level detection component and the feeding component need to be installed and disassembled independently, which makes it inconvenient to move the material tank. Utility Model Content

[0004] In view of this, in order to solve at least one of the above technical problems, the utility model provides a feeding device and a 3D printer.

[0005] In order to achieve the above purpose, the utility model mainly provides the following technical solutions:

[0006] On the one hand, the utility model provides a feeding device for a light-curing 3D printer, characterized in that the light-curing 3D printer includes a material trough, the material trough is used to hold the material to be printed for model curing and printing, and the feeding device includes:

[0007] The feeding device body includes a discharge end and a feed end, the discharge end is connected to the material bin, and the feed end is arranged opposite to the material trough, and the material bin is used to store the material to be printed for replenishing the material trough;

[0008] The detection component is connected to the feeding device body, and the detection component includes a conductive member. When the conductive member contacts the material to be cured in the material trough, a first electrical signal is output, and when the conductive member does not contact the material to be cured in the material trough, a second electrical signal is output. The first electrical signal is different from the second electrical signal.

[0009] On the other hand, the utility model also provides a 3D printer, comprising any one of the feeding devices described above.

[0010] The utility model proposes a feeding device and a 3D printer, which realize the integration of feeding and withdrawing materials and liquid level detection mainly by setting a detection component on the feeding device body, which can be moved at the same time, is easy to disassemble and assemble, and has a simple structure. In the prior art, the liquid level detection component and the feeding component are independently set, and each needs to be provided with an independent support or connection structure, resulting in a large space occupation and structural redundancy. When the material trough needs to be moved separately, the liquid level detection component and the feeding component need to be independently installed and disassembled, resulting in inconvenience in moving the material trough. Compared with the prior art, in the present application document, the detection component is arranged on the feeding device body and is connected as a whole, which can facilitate the movement of the material trough and reduce the space occupied by the feeding and detection components on the material trough. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 A schematic structural diagram of a feeding device provided by an embodiment of the utility model at a first viewing angle;

[0012] Figure 2 A schematic structural diagram of a feeding device provided by an embodiment of the utility model at a second viewing angle;

[0013] Figure 3 A schematic diagram of the structure of a feeding device provided by an embodiment of the utility model when the moving part is in an idle position;

[0014] Figure 4 A schematic structural diagram of a feeding device provided by an embodiment of the utility model when the moving part is located at the detection position;

[0015] Figure 5 A schematic cross-sectional view of a feeding device provided in an embodiment of the utility model when the moving part is in an idle position;

[0016] Figure 6 A schematic cross-sectional view of a feeding device provided by an embodiment of the utility model when the moving part is located at a detection position;

[0017] Figure 7 for Figure 6 A partial enlarged view of the feeding device in area A shown;

[0018] Figure 8 A schematic structural diagram of another feeding device provided by an embodiment of the utility model when the moving part is in an idle position;

[0019] Fig. 9 A schematic structural diagram of another feeding device provided by an embodiment of the utility model when the moving part is located at the detection position;

[0020] Fig.10 for Fig. 9 A partial enlarged view of the feeding device in area B is shown;

[0021] Fig.11 A structural schematic diagram of another feeding device provided by an embodiment of the utility model at a first viewing angle when the moving part is located at the detection position;

[0022] Fig.12 A structural schematic diagram of another feeding device provided by an embodiment of the utility model at a second viewing angle when the moving part is located at the detection position;

[0023] Fig.13 A schematic structural diagram of another feeding device provided in an embodiment of the utility model at a third viewing angle when the moving part is located at the detection position. DETAILED DESCRIPTION

[0024] In order to further explain the technical means and effects adopted by the utility model to achieve the predetermined utility model purpose, the specific implementation, structure, characteristics and effects of the feeding device proposed according to the utility model are described in detail below in combination with the accompanying drawings and preferred embodiments. For the convenience of description, the light emitted by the light source is described in the form of light rays.

[0025] On the one hand, if Figure 1-13 As shown, the embodiment of the utility model provides a feeding device for a 3D printer, the light-curing 3D printer includes a material trough, the material trough is used to hold the material to be printed for model curing and printing, and the feeding device includes:

[0026] The feeding device body is used to transmit the material to the material trough of the 3D printer, including a discharge end 301 and a feed end 302, the discharge end 301 is connected to the material bin, and the feed end 302 is arranged opposite to the material trough, and the material bin is used to store the material to be printed for replenishing the material trough;

[0027] The detection component 400 is connected to the feeding device body. The detection component 400 includes a conductive member. When the conductive member contacts the material to be cured in the material trough, a first electrical signal is output. When the conductive member does not contact the material to be cured in the material trough, a second electrical signal is output. The first electrical signal is different from the second electrical signal.

[0028] The 3D printer also includes a printer body, which mainly includes a base, a lifting mechanism and a printing platform. The base includes an inner cavity, in which a light source assembly is arranged. A display screen is arranged on the upper bottom plate of the base. A material trough is placed above the display screen, and the material trough is used to hold the aforementioned materials to be printed. The lifting mechanism is connected to the base, and the printing platform is connected to the lifting mechanism and is opposite to the material trough. The lifting mechanism is used to drive the printing platform to rise and fall relative to the material trough, and then perform 3D printing.

[0029] The feeding device body includes a discharge end 301, and the feeding device body is used to feed the material into the accommodating cavity of the material trough through the discharge end 301. During the printing process, at least the discharge end 301 of the feeding device body needs to be opposite to the accommodating cavity of the material trough. The detection component 400 includes a conductive member, and the conductive member includes a detection end. The detection component 400 is used to contact the material to be printed through the detection end, and detect the liquid level of the material to be printed according to the change of the first electrical signal and the second electrical signal. During the printing process, at least the detection end of the detection component 400 needs to be opposite to the accommodating cavity of the material trough. Relative means being located in the accommodating cavity of the material trough or in the area above the accommodating cavity of the material trough, so that the feeding device body and the detection component 400 will hinder the movement of the material trough. After the printing is completed, the material trough needs to be moved to dump the remaining resin and clean the material trough, etc. The position of the discharge end 301 and the detection end can be moved by moving the overall structure or partial structure of the feeding device body, so that the discharge end 301 and the detection end are moved out of the accommodating cavity and moved to the outside of the space above the accommodating cavity, and then the material trough can be moved for cleaning, etc. When the material trough needs to be reinstalled for printing, the entire structure or part of the structure of the feeding device body is moved again to move the position of the discharge end 301 and the detection end, so that the discharge end 301 and the detection end are moved back to the accommodating cavity or the upper area of ​​the material trough accommodating cavity, so that only the entire structure or part of the structure of the feeding device body needs to be moved to adjust the position of the discharge end 301 and the detection end at the same time, which is convenient for operation. Several specific cases will be given as examples for further explanation.

[0030] The feeding device body can be of various structures. The feeding device body can be of a fixed structure, which only supports the various parts of the feeding device body and the detection component 400, that is, it can only move as a whole; or, the feeding device body can also be divided into multiple parts, and different parts can move relatively to each other, and through the synergy of each part, it can move the discharge end 301 and the detection end at the same time. The feeding device body can be connected to the printer body, and the connection with the printer body can be a fixed connection, such as a bolted connection, or a detachable connection in the form of plug-in, hanging, clamping or magnetic connection. When the feeding device body includes multiple parts, only part of it can be moved to realize the movement of the discharge end 301 and the detection end, without the need to disassemble the entire feeding device body. Alternatively, the feeding device body can be detachably connected to the material trough. Alternatively, the feeding device body can be connected to the printer body and the material trough at the same time, and the connection with the material trough can be detachably connected, which will not be repeated. It is worth noting that the detection component 400 is arranged on the feeding device body, and there is no need to set up an additional supporting structure for the detection component 400, so that the structure is compact, and the feeding device body occupies the space above the material trough, reducing the space occupied.

[0031] The detection component 400 can be a conductive member in various forms. For example, the conductivity of the material to be printed can be used to detect the resin liquid level, and different signals can be output according to the change in electrical properties. This will be described in detail in conjunction with specific embodiments below. In some other implementations, the conductive member can also include non-contact components such as infrared detectors. The contact between the conductive member and the material to be cured in the material tank refers to the liquid level of the material to be cured triggering the non-contact component to send an electrical signal. The contact at this time refers to the contact between the material to be cured and rays such as infrared rays, rather than actual mechanical contact.

[0032] It is worth noting that the feeding device body of the present application can be used not only for feeding, but also for withdrawing, that is, the discharging end 301 can not only discharge, but also suck. The material to be printed can be driven in different directions by setting one or two power parts, thereby achieving feeding and withdrawing. This application will be described in conjunction with more specific implementation methods later.

[0033] A feeding device and a 3D printer proposed in the embodiments of the utility model mainly realize the integration of material feeding and withdrawing and liquid level detection by arranging a detection component on the feeding device body, which can reduce the space occupied by the feeding and detection components on the material trough.

[0034] In the related art, the liquid level detection component and the feeding component are independently provided, and each needs to be provided with an independent support or connection structure, resulting in a large space occupation and structural redundancy. When the trough needs to be moved separately, the liquid level detection component and the feeding component need to be independently installed and disassembled, resulting in inconvenience in the movement of the trough. Compared with the related art, in the present application document, the detection component is provided on the feeding device body and connected as one, for example, the feeding and detection components can be simultaneously disassembled and assembled by disassembling the feeding device body, or, for example, the switching of the interference state and the non-interference state between the feeding device and the trough can be achieved by switching the detection state and the idle state of the feeding device, so that the movement of the trough can be facilitated while reducing the space occupied by the feeding and detection components on the trough. In addition, there is no need to set a separate support structure for the detection component, and the integration of the support structure is realized through the feeding device body, so that the structure between the feeding and detection components is more compact, avoiding structural redundancy, and greatly reducing the space occupied by the trough caused by the automatic feeding structure.

[0035] In one embodiment, the detection component 400 is disposed at the discharge end 301. The detection component 400 and the discharge end 301 are disposed close to each other, so that when the conductive member contacts the material to be printed for liquid level detection, the position of the discharge end 301 will not be too high, so as to avoid splashing when the discharge end 301 is too high and when the material is fed, when the discharge end 301 reaches a suitable feeding position, the conductive member can detect a lower liquid level, and then an alarm can be realized when the material to be printed in the trough is insufficient. In addition, the liquid level detection can be realized while discharging the material, and the residual material of the discharging can be detected. The residual material at a lower position can be detected, which is helpful for the discharge of the material to be printed in the trough.

[0036] In one embodiment, the feeding device body also includes a base 100, and the discharge end 301 is movably connected to the base 100; the discharge end 301 includes at least a first active position and a second active position; when the discharge end 301 is in the first active position, the discharge port of the discharge end 301 is located in the material trough, and when the discharge end 301 is in the second active position, the discharge port of the discharge end 301 is located outside the material trough.

[0037] The base 100 is used to connect the printer body, and the discharge end 301 is movably connected to the base 100, so that the position of the discharge end 301 can be changed according to actual use requirements. For example, when disassembling the material trough, the discharge end 301 can be moved to the second movable position, and then make way for the material trough, so as to facilitate the retrieval of the material trough. When it is necessary to feed or discharge the material trough, the discharge end 301 moves to the first movable position, which can realize normal feeding or more thorough discharge. The discharge end 301 can be movably connected to the base 100, so that when the discharge end 301 is in the first movable position, the normal automatic feeding function and discharge function can be realized, and when the discharge end 301 is in the second movable position, the discharge end basically does not occupy the printing space in the material trough, which can basically avoid limiting the printing area of ​​the model, or hindering the up and down movement of the printing platform, thereby reducing the occupation and limitation of the space of the material trough caused by the automatic feeding structure.

[0038] Or in some other implementations, the discharge end 301 and the base 100 may also be fixedly connected, and the discharge end 301 may be moved by the overall movement of the base 100 .

[0039] In one embodiment, the feeding device body includes a discharge portion 200 and a feeding portion 300, the discharge portion 200 includes a discharge end 301, the feeding portion 300 includes a feed end 302, the feed portion 300 is connected and communicated with the discharge portion 200, the discharge portion 200 is movably connected with the base 100, the position of the discharge portion 200 includes an idle position and a detection position, the discharge portion 200 can move between the detection position and the idle position, so that the discharge end 301 follows the discharge portion 200 to move between the first active position and the second active position. The conductive member includes a detection end, when the detection end contacts the material to be cured in the trough, the conductive member outputs a first electrical signal, when the detection end does not contact the material to be cured, the conductive member outputs a second electrical signal, and the conductive member is connected to the discharge portion 200, so that the detection end follows the movement of the discharge portion 200.

[0040] The base 100 is used to be fixedly or detachably connected to the base, and can be connected to multiple positions of the base, such as being connected to the upper bottom plate and being arranged near the material trough, or being connected to the side wall of the base, etc. The discharge portion 200 can be directly connected to the base 100, such as being connected by rotation, sliding, or snapping, etc., or can be indirectly connected by, for example, a driving member. The discharge portion 200 can be moved between the detection position and the idle position by manual movement or by automatic driving by a driving member. Depending on the different structures of the feed portion 300 and the detection component 400, the connection mode between the feed portion 300 and the discharge portion 200 is different from the connection mode between the detection component 400 and the discharge portion 200. If the feed portion 300 is a feed pipe, the feed pipe is connected and communicated with the discharge portion 200. If the conductive member can include a probe, the end of the probe used to contact the material to be printed is the detection end. The probe can be connected to the discharge portion 200 as a whole, or only a partial area including the detection end is connected and moved with the discharge portion 200. By moving the discharge part 200 relative to the base 100, it is possible to realize the movement of the discharge end 301 and the detection end by moving the discharge part 200 without disassembling the entire feeding device body, and the movement is convenient. The discharge end 301 can be arranged at the end of the discharge part 200 away from the base 100, or at multiple positions on the discharge part 200, such as on the side wall.

[0041] In one embodiment, the discharge end 301 is disposed adjacent to one end of the discharge portion 200 close to the material trough, such as the discharge end 301 is located at one end of the discharge portion 200 for extending into the accommodating cavity of the material trough, so that the discharge end 301 can be located sufficiently close to the bottom end of the material trough, thereby avoiding splashing when the discharge end 301 is located too high. In addition, when discharging the material to be printed, the discharge end 301 can be located sufficiently close to the bottom end of the material trough, which can reduce the residual material to be printed in the material trough.

[0042] And / or, the detection end is disposed adjacent to an end of the discharge portion 200 close to the material trough, such as the detection end is disposed adjacent to an end of the discharge portion 200 for extending into the material trough. Then, the detection end can be positioned close enough to the bottom of the material trough to contact the material to be printed for lower liquid level detection, material shortage detection, and material discharge residual detection.

[0043] In one embodiment, the discharge end 301 and the detection end move at least in the vertical direction. The base 100 includes a bottom surface, which is used to be opposite to the support surface supporting the printer body. When the discharge part 200 is in the idle position, the vertical distance between the discharge end 301 and the bottom surface of the base 100 is greater than the vertical distance between the discharge end 301 and the bottom surface of the base 100 when the discharge part 200 is in the detection position. And the vertical distance between the detection end and the bottom surface of the base 100 is greater than the vertical distance between the detection end and the bottom surface of the base 100 when the discharge part 200 is in the detection position.

[0044] In the embodiment in which any one of the discharge end 301 and the detection end is located in the trough accommodating cavity during printing, the movement of the discharge end 301 and the detection end needs to have weight at least in the vertical direction to make way for the trough. The bottom surface is the lowest surface of the base 100 when in use, and the support surface supporting the printer body can be a desktop, a support table, etc. When the discharge part 200 is in an idle position, the vertical distance between the discharge end 301 and the detection end and the bottom of the base 100 becomes larger, and the increased vertical distance can be greater than the height of the trough, thereby realizing the removal of the discharge end 301 and the detection end from the trough. On the one hand, the movement in the vertical direction can enable the detection end and the discharge end 301 to reach the bottom position in the trough, and will not hinder the trough when moving the trough; on the other hand, it can reduce the overall extension range of the feeding device in the horizontal direction. In the embodiment in which the feeding device is connected to the base of the printer, it can realize the reduction of the upper surface space of the base occupied by the feeding device, thereby facilitating the lightweight setting of the base.

[0045] In another embodiment, the discharging end 301 and the detection end move at least in the horizontal direction. The base 100 includes a side surface, and the side surface is used to be opposite to the material trough. When the discharging part 200 is in the idle position, the vertical distance between the discharging end 301 and the side surface is smaller than the vertical distance between the discharging end 301 and the side surface when the discharging part 200 is in the detection position. And when the discharging part 200 is in the idle position, the vertical distance between the detection end and the side surface is smaller than the vertical distance between the detection end and the side surface when the discharging part 200 is in the detection position.

[0046] For example, when printing, in an embodiment where the discharge end 301 and the detection end are located in the area above the trough accommodating cavity, the movement of the discharge end 301 and the detection end can be horizontal movement, and only horizontal movement can achieve giving way. When the discharge portion 200 is in an idle position, the discharge end 301 and the detection end are moved out of the area above the trough accommodating cavity. Moving in the horizontal direction, on the one hand, can realize the picking up of the trough in the vertical direction, which can reduce the risk of the trough scraping the discharge portion 200 when moving, and avoid scratching and causing overload damage to the driving mechanism 500 driving the discharge portion 200; on the other hand, during the process of replacing the trough, it is prevented that the residual material to be printed in the discharge portion 200 drips into the printing area, such as dripping into the display area of ​​the display screen, affecting the molding accuracy.

[0047] In another embodiment, the discharge end 301 and the detection end can be moved in the vertical direction and the horizontal direction at the same time, that is, they can be moved out of the accommodating cavity of the trough at the same time, and moved to the outside of the area above the accommodating cavity. For example, the discharge part 200 can be rotated to move the discharge end 301 and the detection end horizontally and vertically at the same time. In this way, it has the advantages of the aforementioned horizontal and vertical movement implementation mode, which will not be repeated here.

[0048] In one embodiment, the discharge part 200 includes a discharge channel and a discharge port 202 that are connected to each other. The discharge port 202 is located at the discharge end 301 . The feed part 300 is connected to the discharge channel. A notch 203 is provided on the side wall of the discharge part 200 connected to the discharge port 202 .

[0049] The discharge port 202 is provided at the discharge end 301 of the discharge part 200, and the discharge port 202 is used for discharging materials. The discharge end 301 is used to contact with the material trough or to be spaced less than a preset distance from the bottom of the material trough, and by abutting against the bottom surface of the material trough or the release film of the material trough, or the distance is less than a preset distance, the material to be printed flowing out flows smoothly and is not easy to splash. If it abuts against the bottom of the material trough, the position of the discharge part 200 is stable and not easy to shake. At the same time, when the material to be printed in the material trough is withdrawn, the discharge end 301 is used to contact with the material trough or to be spaced less than a preset distance from the bottom of the material trough, which can ensure that the material is withdrawn more thoroughly and reduce the residual material to be printed on the material trough.

[0050] The notch 203 is provided so that the material to be printed flowing out of the discharge end 301 can flow into the material trough through the notch 203. The notch 203 serves as a channel for the material to be printed to flow out from the discharge channel to the material trough, and also serves to increase the flow rate. In one embodiment, the notch 203 includes at least one first notch 2031, and the first notch 2031 is opened on the side of the discharge portion 200 opposite to the base 100. Since the base 100 is provided on one side of the material trough, the discharge end 301 and the detection end are both located in the accommodating cavity of the material trough near one side of the base. The first notch 2031 faces the side opposite to the base 100, and the material to be printed flowing out of the first notch 2031 will flow toward the opposite base 100, thereby allowing the material to be printed to flow smoothly into the material trough, which helps to quickly and evenly fill the feed trough when the material to be printed is fed. In addition, when the material is returned, the material to be printed located on the side of the material trough away from the base 100, or the side of the material trough away from the discharge end 301, is also more likely to enter through the first notch 2031, thereby accelerating the return of the material and reducing the residue of the material to be printed. In some embodiments, the notch 203 may also include at least one second notch 2032, the second notch 2031 is opened at a position of the discharge portion 200 opposite to the detection end 100, and the material to be printed flowing out of the second notch 2032 will flow toward the detection end, avoiding the slow flow speed to the detection end due to the viscosity of the material to be printed, and avoiding the lag of the detection result of the detection end. In addition, during the material return process, the material to be printed dripping on the detection end is more likely to enter the second notch 2032 and be discharged, avoiding the material to be printed dripping on the detection end from remaining at the bottom of the material trough. The first notch 2031 and the second notch 2032 can be set at the same time, or only one of the first notch 2031 and the second notch 2032 can be set. The number of the first notch 2031 and the second notch 2032 can be multiple, and the number and position of the second notch 2032 can be determined according to the distribution of the detection end. For example, if the detection end is distributed on opposite sides of the discharge part 200, one or more second notches 2032 are respectively provided on the opposite sides of the discharge part 200.

[0051] In one embodiment, the discharge portion 200 may be a strip-shaped movable arm extending in a single direction, the base 100 may be disposed on one side of the trough in the horizontal direction, the discharge end 301 may be located in the upper region of the accommodating cavity of the trough for feeding, and the detection end may perform non-contact liquid level detection. Alternatively, the base 100 may be disposed in the upper region of the accommodating cavity of the trough, so that the discharge end 301 and the detection end may extend into the accommodating cavity.

[0052] Alternatively, in some other embodiments, the discharge portion 200 includes a first extension portion 210 and a second extension portion 220, the first extension portion 210 is connected to the base 100, the second extension portion 220 is connected to the first extension portion 210, at least part of the detection component 400, such as a conductive member, is connected to the second extension portion 220, and the discharge end 301 is located on the second extension portion 220. The extension directions of the first extension portion 210 and the second extension portion 220 form a preset angle.

[0053] The preset angle can be a variety of angles, such as a 90-degree angle. The first extension 210 and the second extension 220 form an approximately L-shaped movable arm. By bending, the base 100 can be set on one side of the horizontal direction of the trough to avoid occupying the space above the trough. Alternatively, the preset angle is any angle between 60 and 120 degrees, which can be set according to the available space and the difficulty of processing. The end of the second extension 220 away from the first extension 210 can be a discharge end 301 for extending into the trough. The discharge end 301 and the detection end are adjacent to the end of the second extension 220 away from the first extension 210, so that the positions of the discharge end 301 and the detection end can be close enough to the bottom of the trough, so that the liquid level detection can be achieved by contacting the material to be printed, and splashing can be avoided when the discharge end 301 is too high when feeding.

[0054] In one embodiment, the feeding device further includes a driving mechanism 500, which is connected to the base 100, and the discharge portion 200 is connected to the driving mechanism 500, and the driving mechanism 500 is used to drive the discharge portion 200 to move relative to the base 100 so that the discharge portion 200 is located in an idle position or a detection position.

[0055] The drive mechanism 500 is set to automatically switch the position of the discharge part 200. The drive mechanism 500 can drive the discharge part 200 to move in a variety of ways, so as to make the discharge end 301 and the detection end move as required. Several implementation methods are listed below.

[0056] First, if Figure 1-6 As shown, the driving mechanism 500 is used to drive the discharging part 200 to rotate relative to the base 100, so that the discharging part 200 is located at the idle position or the detection position. The driving mechanism 500 can be a motor, and the output shaft of the motor is connected to the discharging part 200, which then drives the discharging part 200 to rotate.

[0057] Secondly, the driving mechanism 500 is used to drive the discharging part 200 to move linearly relative to the base 100, so that the discharging part 200 is located at the idle position or the detection position. The linear movement can be horizontal linear movement; or Figure 7-8 As shown, the linear movement is a vertical linear movement; or, in some other embodiments, the linear movement may also be an inclined movement.

[0058] The driving mechanism 500 drives the discharging part 200 to move linearly, which can be realized in the following manner: the driving mechanism 500 includes a driving member and a gear, the discharging part 200 is provided with meshing teeth, the discharging part 200 is meshed with the gear, the driving member is connected with the gear, and the driving member is used to drive the gear to rotate, thereby driving the discharging part 200 to move linearly. The number of gears and driving members can be one or two, respectively, and the two gears are respectively located on different sides of the discharging part 200, and the discharging part 200 is pushed up and down by the gear connection. Alternatively, the discharging part 200 is slidably connected with the base 100, and is positioned at the upper limit of the circumference of the discharging part 200 with the base 100, so that the discharging part 200 cannot rotate and can only move linearly, the driving mechanism 500 includes a driving member and a coil nut, the nut is sleeved on the outer wall of the discharging part 200, and the nut is threadedly connected with the discharging part 200, and the driving member includes an electromagnetic coil, and the driving member is used to energize, and through electromagnetic action, the driving nut 22 is rotated, and the thread pushes the discharging part 200 to move linearly. Alternatively, the discharge portion 200 is slidably connected to the base 100 and is positioned at the upper limit of the circumference of the discharge portion 200 with the base 100, and the driving mechanism 500 includes a driving member and a screw, the screw is inserted into the discharge portion 200, and the screw is threadedly connected to the discharge portion 200, and the driving member is used to drive the screw 22 to rotate, and the thread pushes the discharge portion 200 to move linearly. Alternatively, there may be other embodiments, which are not listed here one by one.

[0059] In one embodiment, the base 100 includes an inner cavity 101 and a clearance port 102 connected to the inner cavity, the driving mechanism 500 is located in the inner cavity 101, the discharge portion 200 is connected to the clearance port 102, at least part of the discharge portion 200 is located in the inner cavity 101 to be connected to the driving mechanism 500, and when the discharge portion 200 is in the detection position, at least part of the discharge portion 200 is located outside the inner cavity 101, so that the discharge end 301 and the detection end are located outside the inner cavity 101.

[0060] When the discharging part 200 is in the detection position, the partial area where the discharging end 301 and the detection end are connected is located outside the inner cavity 101, corresponding to the area above the trough or extending into the trough. When the discharging part 200 is in the idle position, the discharging part 200 can be completely located in the inner cavity 101. Alternatively, when the discharging part 200 is in the detection position and the idle position, the partial area where the discharging end 301 and the detection end are located are all located outside the inner cavity 101. For example, in an embodiment in which the discharging part 200 includes a first extension part 210 and a second extension part 220, one end of the first extension part 210 extends into the inner cavity 101 and is connected to the motor in the inner cavity 101, the other end of the first extension part 210 is located outside the inner cavity 101, and the second extension part 220 is located outside the inner cavity 101. The driving mechanism 500 can be used to drive the first extension part 210 to rotate, or move linearly, and the yielding port 102 yields for the movement of the first extension part 210. The first extension portion 210 can be slidably abutted against the edge of the clearance opening 102 , or can be spaced apart. The inner cavity 101 at least plays a role in protecting the driving mechanism 500 .

[0061] In one embodiment, at least one vent 103 is provided on the base 100, and the vent 103 is connected to the inner cavity 101. There may be multiple vents 103, which may be provided on two opposite sides of the base 100 to dissipate heat for the inner cavity 101.

[0062] The feed part 300 and the detection component 400 can be in various forms, and the detection component 400 can be contact detection or non-contact detection. The following example illustrates a specific implementation of the feed part 300 and the detection component 400. It can be understood that the feed part 300 and the detection component 400 can also have other implementations.

[0063] In an embodiment of the feed part 300, the feed part 300 includes a feed pipe, which is connected to the discharge part 200. The discharge part 200 includes a discharge channel, an intermediate interface and a discharge port 202, the discharge channel is respectively connected to the intermediate interface and the discharge port 202, the discharge port 202 is located at the discharge end 301, and the feed pipe is connected to the discharge channel through the intermediate interface.

[0064] The discharge port 202 is used to discharge the material to be printed when the discharge portion 200 is in the detection position and is opposite to the material trough. In the embodiment where the discharge portion 200 includes the first extension portion 210 and the second extension portion 220, the discharge port 202 is provided at one end of the second extension portion 220 away from the first extension portion 210. In the embodiment where the aforementioned base 100 includes the inner cavity 101, the intermediate interface is located in the inner cavity 101, and one end of the hose is connected to the discharge channel through the intermediate interface. A adapter can be provided at the intermediate interface to achieve the connection between the hose and the discharge channel, or a part of the structure of the hose can be inserted into the discharge channel through the intermediate interface to transfer the material to be printed to the discharge port 202 for discharge. The other end of the hose leads to the inner cavity 101, and the other end of the hose can continue to be led out of the inner cavity 101 and communicate with the storage tank. The other end of the hose can be led out from the bottom end of the base 100, or can be located on the side wall of the other end of the hose. The feed pipe is a hose, which can be made of flexible rubber. When the discharge part 200 moves, the feed pipe can deform flexibly so that the area located in the discharge channel moves synchronously with the discharge part 200. In addition, the feed pipe is also connected with a conveying power member, such as a peristaltic pump, which can be arranged in the inner cavity 101 or outside the inner cavity 101. For example, the conveying power member can rotate forward, and then the material to be printed is transferred to the material trough, which is realized as the material trough is added, or the conveying power member can be reversed, and then the material to be printed is discharged from the material trough, which is realized as the material trough is discharged. Alternatively, the feed pipe is also connected with a first power member and a second power member, and the first power member is responsible for driving the material to be printed to be transferred to the material trough, which is realized as the material trough is added. The second power member is responsible for discharging the material to be printed from the material trough, which is realized as the material trough is discharged. In some embodiments, there can be two conveying pipes, discharge channel and discharge port 202, and the two conveying pipes are respectively connected to the first power member and the second power member, so that feeding and discharging can be performed simultaneously, and the circulation or cleaning of the material tank can be realized.

[0065] In an embodiment of a detection component 400, the conductive member includes a first probe 410 and a second probe 420, and the first probe 410 and the second probe 420 are connected to the feeding device body, or, when the feeding device body includes a discharge part 200, the first probe 410 and the second probe 420 are connected to the discharge part 200.

[0066] The first probe 410 and the second probe 420 are both metal probes. Voltage is applied to the first probe 410 and the second probe 420 through an electrical connection line. The first probe 410 and the second probe 420 both include a detection end. When the detection end of the first probe 410 and the detection end of the second probe 420 contact the material to be printed, the first probe 410 and the second probe 420 will be electrically connected, and then a first electrical signal will be generated and output. When the detection end of the first probe 410 and the detection end of the second probe 420 are separated from the material to be printed, the first probe 410 and the second probe 420 will be electrically disconnected, and then a second electrical signal different from the first electrical signal will be generated, so as to determine the liquid level, so that the device can determine whether to perform automatic feeding operation or automatic withdrawal operation or temporarily not perform feeding and withdrawal operation according to the liquid level, thereby improving the intelligence of the device.

[0067] In one embodiment, the discharge portion 200 includes a discharge channel and an intermediate interface, the discharge channel is connected to the intermediate interface, and the detection component 400 also includes an electrical connection line; the base 100 includes an inner cavity 101, the intermediate interface is located in the inner cavity 101, and the electrical connection line is at least partially located in the inner cavity 101.

[0068] The other end of the first probe 410 away from the detection end and the other end of the second probe 420 away from the detection end extend into the housing of the discharge part and are respectively connected with electrical connection wires. The electrical connection wires are routed in the inner cavity. In the embodiment in which the base 100 includes the inner cavity 101, the electrical connection wires are routed inside, with a compact structure and a simple appearance.

[0069] In one embodiment, a mounting groove is provided on the outer wall of the discharge portion 200, and the conductive member is embedded in the mounting groove.

[0070] In the embodiment where the discharge portion 200 includes the first extension portion 210 and the second extension portion 220, there are two mounting grooves, which are arranged on the second extension portion 220 and extend in a direction away from the first extension portion 210 to a position adjacent to the end of the second extension portion 220. The first probe 410 and the second probe 420 are both embedded in the mounting grooves, and the detection end of the first probe 410 and the detection end of the second probe 420 are located at one end of the mounting groove away from the first extension portion 210.

[0071] Optionally, in some embodiments, at least part of the length of the conductive part is exposed, so that when the discharge part is in the detection position, the resin is hung on the conductive part and the installation gap of the conductive part, and the resin is difficult to drip. The problem of insufficient detection sensitivity caused by the resin hidden in the conductive part and the installation gap of the conductive part can be appropriately solved. When the discharge part is in the detection position, the connection between the exposed section and the non-exposed section of the conductive part is higher than the maximum material capacity of the material trough, which can further avoid the problem of the conductive part and the installation gap of the conductive part hanging on the resin when the discharge part is in the detection position, and the resin can be easily dripped, which can reduce the problem of insufficient detection sensitivity caused by the resin hidden in the conductive part and the installation gap of the conductive part.

[0072] Optionally, in some embodiments, based on the embodiment in which the discharge portion 200 includes a first extension portion 210 and a second extension portion 220, the discharge portion 200 also includes a third extension portion 230. For the case in which the discharge portion 200 is in the detection position, the first extension portion 210 extends from the base 100 in a direction away from the base 100, the second extension portion 220 extends from the first extension portion 210 in a direction toward the material trough, and the third extension portion 230 extends from the second extension portion 220 in a direction toward the material trough; the cross-sectional area of ​​the third extension portion 230 along the cross-sectional area parallel to the bottom surface of the material trough is smaller than the cross-sectional area of ​​the second extension portion along the cross-sectional area parallel to the material trough; the third extension portion 230 includes a discharge end 301, and the conductive member is connected to the second extension portion 220 and is located on at least one side of the third extension portion 230; when the discharge portion 200 is in the detection position, the connection between the conductive member and the second extension portion 220 is higher than the maximum material capacity of the material trough. In this way, the resin can be easily dripped, and the problem of insufficient detection sensitivity caused by the resin being hidden in the conductive parts and the installation gap of the conductive parts can be reduced. In addition, the problem of the conductive parts and the installation gap of the conductive parts being hung with resin when the discharge part is in the detection position can be avoided.

[0073] like Fig. 9 In the illustrated embodiment, the location of a schematic surface 900 of the bottom surface of the trough is shown to illustrate one possible positional relationship between the automatic feeding device and the trough. When the discharge portion is in the detection position, the detection portion and the discharge port both overlap with the bottom surface of the trough in the vertical projection direction.

[0074] The third extension part 230 can be consistent with the extension direction of the second extension part 220, and is closer to the material slot than the second extension part 220. The end of the third extension part 230 away from the second extension part 220 is the discharge end 301. The width of the third extension part 230 is smaller than that of the second extension part 220, and then the conductive member can be led out of the part of the second extension part 220 that exceeds the third extension part 230. For example, the first probe 410 and the second probe 420 are led out from the end surface of the second extension part 220 relative to the third extension part 230, and are extended and arranged on the opposite sides of the third extension part 230 along the extension direction of the third extension part 230. The discharge port 202 is located at the end of the third extension part 230 away from the second extension part 220. The end of the third extension part 230 away from the second extension part 220 can be used to abut the bottom surface of the material slot or the release film, or can be simply suspended in the material slot, and the distance from the bottom of the material slot is less than the preset distance to prevent the material to be printed from splashing. In the embodiment where the edge of the discharge port 202 is provided with a notch 203, and the discharge channel is at least connected to the outside through the notch 203, the second notch 2032 is provided on the opposite sides of the third extension portion 230, and then respectively corresponds to the first probe 410 and the second probe 420. Compared with the embodiment where the first probe 410 and the second probe 420 are provided in the mounting groove, the provision of the second notch 2032 can make the first probe 410 and the second probe 420 contact the resin more timely, thereby increasing the sensitivity of the detection.

[0075] In one embodiment, the feeding device further includes a main controller 600 , which is connected to the feeding device body, and the main controller 600 is electrically connected to at least one of the driving mechanism 500 and the detection component 400 .

[0076] The main controller 600 is used to be electrically connected to the mainboard of the 3D printer, and then receive the mainboard signal according to the printing process, and control the driving mechanism 500 to drive the discharge part 200 to move between the detection position and the idle position. It is also possible to obtain the detection signal of the liquid level from the detection component 400, and then send the detection signal to the mainboard after preliminary processing, or send the detection signal directly to the mainboard. In an embodiment in which the base 100 includes an inner cavity 101, the main controller 600 is located in the inner cavity 101. In an embodiment in which electrical connection lines are respectively connected to the first probe 410 and the second probe 420, the electrical connection lines are electrically connected to the main controller 600 after being led out to the inner cavity 101.

[0077] In one implementation, the main controller 600 is provided with an electrical connection plug 610 or an electrical connection socket, and the main controller 600 is used to be mechanically plugged in and electrically connected to the printer body through the electrical connection plug 610 or the electrical connection socket.

[0078] The printer body includes a base and a main board located in the base. The base 100 is connected to the printer body, specifically, it can be connected to the printer base, and the printer base is provided with a plug 610 or an electrical connection socket electrically connected to the main board. The base 100 also includes a mounting port connected to the inner cavity 101, and the main controller 600 is located in the inner cavity 101. When the main controller 600 is provided with an electrical connection plug 610, the electrical connection plug 610 extends from the mounting port to the outside of the inner cavity 101, and when the main controller 600 is provided with an electrical connection socket, the electrical connection socket is located at the mounting port. When the base 100 is connected to the printer base, the mounting port is opposite to the printer base, and the electrical connection plug 610 on the main controller 600 is inserted into the electrical connection socket on the printer base, or the electrical connection plug 610 on the printer base is inserted into the electrical connection socket on the main controller 600, so as to realize the mechanical plugging and electrical connection between the main controller 600 and the printer body.

[0079] On the basis of all the above embodiments combined into one embodiment, or on the basis of any of the above embodiments, the feeding device may further include a detection member 700 and a trigger member 800. One of the detection member 700 and the trigger member 800 is connected to the base 100, and the other of the detection member 700 and the trigger member 800 is connected to the discharge portion 200. The trigger member 800 is used to trigger the detection member 700 to send a detection signal when the discharge portion 200 is in at least one of the idle position and the detection position.

[0080] The detection member 700 and the trigger member 800 are used to cooperate in sending a detection signal to indicate whether the discharge portion 200 has reached the idle position and / or the detection position. The detection member 700 and the trigger member 800 can be in various forms, such as the detection member 700 includes a photoelectric sensor, and the trigger member 800 includes a shielding member, such as the trigger member 800 can be a protrusion integrally formed on the discharge portion 200, and the photoelectric sensor is triggered by shielding the light of the photoelectric sensor. Alternatively, the detection member 700 includes a touch switch, and the trigger member 800 includes a contact, and the contact can still be a protrusion integrally formed on the discharge portion 200, and the touch switch is triggered by pressing the contact of the touch switch. Alternatively, the detection member 700 includes a magnetic sensor, and the trigger member 800 includes a magnetic member, such as the magnetic sensor can be a Hall sensor, and when the magnetic member is located in the detection range of the Hall sensor, the Hall sensor will be triggered. In an embodiment in which the base 100 includes an inner cavity 101 and the main controller 600 is located in the inner cavity 101 , the detection element 700 is located in the inner cavity 101 and is electrically connected to the main controller 600 .

[0081] In various embodiments of the present application, if features in different embodiments are not mutually exclusive / not contradictory, they may be combined and implemented in one embodiment.

[0082] On the other hand, the utility model further provides a 3D printer, including any of the feeding devices as described above, including the advantages of any of the feeding devices as described above, which will not be repeated here.

[0083] The utility model also provides the following implementation modes:

[0084] Reference numeral 1. A feeding device for a light-curing 3D printer, wherein the light-curing 3D printer comprises a material trough, the material trough is used to hold a material to be printed for model curing and printing, and the feeding device comprises:

[0085] The feeding device body includes a feeding end 302 and a discharging end 301. The feeding end 302 is connected to the material bin, and the discharging end 301 is arranged opposite to the material trough. The material bin is used to store the material to be printed for replenishing the material trough;

[0086] The detection component 400 is connected to the feeding device body. The detection component 400 includes a conductive member. When the conductive member contacts the material to be cured in the material trough, a first electrical signal is output. When the conductive member does not contact the material to be cured in the material trough, a second electrical signal is output. The first electrical signal is different from the second electrical signal.

[0087] Reference numeral 2. A feeding device according to reference numeral 1, wherein:

[0088] The detection component 400 is disposed at the discharge end 301; and / or

[0089] The feeding device body also includes a base 100, and the discharge end 301 is movably connected to the base 100; the discharge end 301 includes at least a first active position and a second active position; when the discharge end 301 is in the first active position, the discharge port of the discharge end 301 is located in the material trough, and when the discharge end 301 is in the second active position, the discharge port of the discharge end 301 is located outside the material trough.

[0090] Reference numeral 3. A feeding device according to reference numeral 2, wherein:

[0091] The feeding device body further includes a discharge portion 200 and a feeding portion 300, the discharge portion 200 includes a discharge end 301, the feeding portion 300 includes a feed end 302, the feed portion 300 is connected and communicated with the discharge portion 200, the discharge portion 200 is movably connected with the base 100, the position of the discharge portion 200 includes an idle position and a detection position, the discharge portion 200 can move between the detection position and the idle position, so that the discharge end 301 moves between the first active position and the second active position;

[0092] The conductive member includes a detection end. When the detection end contacts the material to be cured in the material trough, the conductive member outputs a first electrical signal. When the detection end does not contact the material to be cured, the conductive member outputs a second electrical signal. The conductive member is connected to the discharge portion 200 so that the detection end moves with the discharge portion 200.

[0093] Reference numeral 4. A feeding device according to reference numeral 3, wherein:

[0094] The discharge end 301 is disposed adjacent to an end of the discharge portion 200 close to the trough; and / or

[0095] The detection end is disposed adjacent to an end of the discharge portion 200 close to the material trough.

[0096] Reference numeral 5. A feeding device according to reference numeral 3, wherein:

[0097] The discharging end 301 and the detection end move at least in the vertical direction;

[0098] And / or, the base 100 includes a bottom surface, the bottom surface is used to be opposite to the supporting surface supporting the printer body, and when the discharge portion 200 is in the idle position, the vertical distance between the discharge end 301 and the bottom surface of the base 100 is greater than the vertical distance between the discharge end 301 and the bottom surface of the base 100 when the discharge portion 200 is in the detection position;

[0099] And / or, the base 100 includes a bottom surface, which is used to be opposite to the supporting surface supporting the printer body. When the discharge part 200 is in the idle position, the vertical distance between the detection end and the bottom surface of the base 100 is greater than the vertical distance between the detection end and the bottom surface of the base 100 when the discharge part 200 is in the detection position.

[0100] Reference numeral 6. A feeding device according to reference numeral 3, wherein:

[0101] The discharging end 301 and the detection end move at least in the horizontal direction;

[0102] And / or, the base 100 includes a side surface, the side surface is used to be opposite to the material trough, and when the discharge portion 200 is in the idle position, the vertical distance between the discharge end 301 and the side surface is smaller than the vertical distance between the discharge end 301 and the side surface when the discharge portion 200 is in the detection position;

[0103] And / or, the base 100 includes a side surface, the side surface is opposite to the material trough, and when the discharge portion 200 is in the idle position, the vertical distance between the detection end and the side surface is smaller than the vertical distance between the detection end and the side surface when the discharge portion 200 is in the detection position.

[0104] Reference numeral 7. A feeding device according to reference numeral 3, wherein:

[0105] The discharge part 200 includes a discharge channel and a discharge port 202 which are connected to each other. The discharge port 202 is located at the discharge end 301. The feed part 300 is connected to the discharge channel. A notch 203 is provided on the side wall of the discharge part 200 connected to the discharge port 202.

[0106] The notch 203 includes at least one first notch 2031 , and the first notch 2031 is opened on a side of the discharge portion 200 opposite to the base 100 ;

[0107] And / or, the notch 203 includes at least one second notch 2032 , and the second notch 2031 is opened at a position of the discharge portion 200 opposite to the detection end 100 .

[0108] Reference numeral 8. A feeding device according to reference numeral 3, wherein:

[0109] The discharge portion 200 extends in a single direction;

[0110] Alternatively, the discharge portion 200 includes a first extension portion 210 and a second extension portion 220, the first extension portion 210 is connected to the base 100, the second extension portion 220 is connected to the first extension portion 210, the conductive member is connected to the second extension portion 220, the second extension portion 220 includes a discharge end 301, and the extension direction of the first extension portion 210 and the second extension portion 220 is a preset angle, the preset angle includes an angle of 90 degrees or any angle between 60 degrees and 120 degrees; the discharge portion 200 also includes a third extension portion 230, for the case where the discharge portion 200 is in the detection position, the first extension portion 210 is from the base 100 to the far The second extension portion 220 extends from the first extension portion 210 toward the material trough, and the third extension portion 230 extends from the second extension portion 220 toward the material trough; the cross-sectional area of ​​the third extension portion 230 along the cross section parallel to the material trough is smaller than the cross-sectional area of ​​the second extension portion 220 along the cross section parallel to the material trough; the third extension portion 230 includes a discharge end 301, and the conductive member is connected to the second extension portion 220 and is located on at least one side of the third extension portion 230; when the discharge portion 200 is in the detection position, the connection between the conductive member and the second extension portion is higher than the maximum material capacity of the material trough.

[0111] Reference numeral 9. A feeding device according to reference numeral 3, wherein:

[0112] The feeding device also includes a driving mechanism 500, which is connected to the base 100, and the discharge part 200 is connected to the driving mechanism 500. The driving mechanism 500 is used to drive the discharge part 200 to move relative to the base 100 so that the discharge part 200 is located in an idle position or a detection position.

[0113] Reference numeral 10. A feeding device according to reference numeral 9, wherein:

[0114] The driving mechanism 500 is used to drive the discharging portion 200 to rotate relative to the base 100 so that the discharging portion 200 is located at an idle position or a detection position;

[0115] Alternatively, the driving mechanism 500 is used to drive the discharging portion 200 to move linearly relative to the base 100 so that the discharging portion 200 is located at an idle position or a detection position.

[0116] Reference numeral 11. A feeding device according to reference numeral 10, wherein:

[0117] The driving mechanism 500 is used to drive the discharging portion 200 to move linearly relative to the base 100.

[0118] The driving mechanism 500 includes a driving member and a gear. The discharging portion 200 is provided with meshing teeth. The discharging portion 200 is meshed with the gear. The driving member is connected with the gear. The driving member is used to drive the gear to rotate and drive the discharging portion 200 to move linearly.

[0119] Alternatively, the discharge portion 200 is slidably connected to the base 100 and is positioned at an upper limit of the circumference of the discharge portion 200 with the base 100, the driving mechanism 500 includes a driving member and a coil nut, the nut is sleeved on the outer wall of the discharge portion 200, and the nut is threadedly connected to the discharge portion 200, the driving member includes an electromagnetic coil, and the driving member is used to drive the nut 22 to rotate, so as to push the discharge portion 200 to move linearly by the thread;

[0120] Alternatively, the discharge portion 200 is slidably connected to the base 100 and is limited in the circumferential direction of the discharge portion 200 by the base 100. The driving mechanism 500 includes a driving member and a screw. The screw is inserted into the discharge portion 200 and is threadedly connected to the discharge portion 200. The driving member is used to drive the screw 22 to rotate, thereby pushing the discharge portion 200 to move linearly with the thread.

[0121] Reference numeral 12. A feeding device according to reference numeral 9, wherein:

[0122] The base 100 includes an inner cavity 101 and a clearance port 102 connected to the inner cavity. The driving mechanism 500 is located in the inner cavity 101. The discharge portion 200 is connected to the clearance port 102. At least part of the discharge portion 200 is located in the inner cavity 101 to be connected to the driving mechanism 500. When the discharge portion 200 is in the detection position, at least part of the discharge portion 200 is located outside the inner cavity 101, so that the discharge end 301 and the detection end are located outside the inner cavity 101.

[0123] Reference numeral 13. A feeding device according to reference numeral 12, wherein:

[0124] At least one ventilation hole 103 is defined on the base 100 , and the ventilation hole 103 is communicated with the inner cavity 101 .

[0125] Reference number 14. A feeding device according to reference number 3, wherein:

[0126] The feed part 300 includes a feed pipe, which is connected to the discharge part 200;

[0127] The discharge part 200 includes a discharge channel, an intermediate interface and a discharge port 202. The discharge channel is connected to the intermediate interface and the discharge port 202 respectively. The discharge port 202 is located at the discharge end 301. The feed pipe is connected to the discharge channel through the intermediate interface.

[0128] The base 100 includes an inner cavity 101 , and the middle interface is located in the inner cavity 101 .

[0129] Reference number 15. A feeding device according to reference number 1, wherein the feeding device further comprises:

[0130] A conveying power member, which is connected to the feeding device body, is used for forward driving to drive the material to be printed to feed into the material trough, and is also used for reverse driving to drive the material to be printed to be discharged from the material trough;

[0131] Alternatively, the first power member and the second power member, the first power member is used to drive the material to be printed to feed into the material trough, and the second power member is used to drive the material to be printed to be discharged from the material trough.

[0132] Reference number 16. A feeding device according to reference number 1, wherein:

[0133] The conductive member includes a first probe 410 and a second probe 420, and the first probe 410 and the second probe 420 are connected to the feeding device body;

[0134] The first probe 410 and the second probe 420 output a first electrical signal when they are in contact with the material to be cured in the tank, and output a second electrical signal when they are not in contact with the material to be cured in the tank.

[0135] Reference number 17. A feeding device according to reference number 3, wherein:

[0136] The discharge part 200 includes a discharge channel and an intermediate interface, and the discharge channel is communicated with the intermediate interface;

[0137] The base 100 includes an inner cavity 101 , and the middle interface is located in the inner cavity 101 .

[0138] Reference number 18. A feeding device according to reference number 3, wherein:

[0139] An installation groove is provided on the outer wall of the discharge portion 200, and the conductive member is embedded in the installation groove;

[0140] And / or, at least part of the length of the conductive member is exposed, and when the discharging portion is in the detection position, the connection between the exposed section and the non-exposed section of the conductive member is higher than the maximum material capacity of the material trough;

[0141] Among them, when the discharge part is in the detection position, the detection part overlaps with the bottom surface of the material trough in the vertical projection direction, and the discharge port overlaps with the bottom surface of the material trough in the vertical projection direction.

[0142] Reference number 19. A feeding device according to reference number 3, wherein the feeding device further comprises:

[0143] A detection member 700 and a trigger member 800, wherein one of the detection member 700 and the trigger member 800 is connected to the base 100, and the other of the detection member 700 and the trigger member 800 is connected to the discharge portion 200;

[0144] The trigger member 800 is used to trigger the detection member 700 to send a detection signal when the discharge portion 200 is in at least one of the idle position and the detection position.

[0145] Reference numeral 20. A feeding device according to reference numeral 19, wherein:

[0146] The detection member 700 includes a photoelectric sensor, and the trigger member 800 includes a shielding member;

[0147] Alternatively, the detection member 700 includes a touch switch, and the trigger member 800 includes a contact;

[0148] Alternatively, the detection member 700 includes a magnetic sensor, and the trigger member 800 includes a magnetic member.

[0149] Reference number 21. A feeding device according to reference number 1, wherein the feeding device further comprises:

[0150] The main controller 600 is connected to the feeding device body, and the main controller 600 is at least electrically connected to the detection component 400 .

[0151] Reference numeral 22. A feeding device according to reference numeral 21, wherein:

[0152] The main controller 600 is provided with an electrical connection plug 610 or an electrical connection socket, and the main controller 600 is used to be mechanically plugged and electrically connected to the printer body through the electrical connection plug 610 or the electrical connection socket.

[0153] Label 23. A 3D printer, comprising a feeding device as described in any one of the above labels 1-22.

[0154] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A feeding device for a light-curing 3D printer, characterized in that: The light-curing 3D printer includes a material trough, which is used to hold the material to be printed for model curing and printing, and the feeding device includes: A feeding device body, the feeding device body comprising a feeding end and a discharging end, the feeding end being connected to a material bin, the discharging end being arranged opposite to the material trough, the material bin being used to store materials to be printed for replenishing the material trough; A detection component is connected to the feeding device body, and the detection component includes a conductive member. When the conductive member contacts the material to be cured in the material trough, a first electrical signal is output, and when the conductive member does not contact the material to be cured in the material trough, a second electrical signal is output, and the first electrical signal is different from the second electrical signal.

2. The feeding device according to claim 1, characterized in that: The detection component is arranged at the discharge end; and / or The feeding device body also includes a base, and the discharging end is movably connected to the base; the discharging end includes at least a first active position and a second active position; when the discharging end is in the first active position, the discharging port of the discharging end is located in the material trough, and when the discharging end is in the second active position, the discharging port of the discharging end is located outside the material trough.

3. The feeding device according to claim 2, characterized in that: The feeding device body further comprises a discharging portion and a feeding portion, the discharging portion comprises the discharging end, the feeding portion comprises the feeding end, the feeding portion is connected and communicated with the discharging portion, the discharging portion is movably connected with the base, the position of the discharging portion comprises an idle position and a detection position, the discharging portion can be moved between the detection position and the idle position, so that the discharging end moves between the first active position and the second active position; The conductive member includes a detection end. When the detection end contacts the material to be cured in the material trough, the conductive member outputs the first electrical signal. When the detection end does not contact the material to be cured, the conductive member outputs the second electrical signal. The conductive member is connected to the discharge portion so that the detection end moves with the discharge portion.

4. The feeding device according to claim 3, characterized in that: The discharge end is disposed adjacent to an end of the discharge portion close to the material trough; and / or The detection end is disposed adjacent to an end of the discharging portion close to the material trough.

5. The feeding device according to claim 3, characterized in that: The discharging end and the detecting end move at least in the vertical direction; And / or, the base includes a bottom surface, the bottom surface is used to be opposite to a supporting surface of a printer body supporting the light-curing 3D printer, and when the discharge portion is in the idle position, a vertical distance between the discharge end and the bottom surface of the base is greater than a vertical distance between the discharge end and the bottom surface of the base when the discharge portion is in the detection position; And / or, the base includes a bottom surface, which is used to be opposite to a supporting surface of a printer body supporting the light-curing 3D printer, and when the discharge portion is in the idle position, a vertical distance between the detection end and the bottom surface of the base is greater than a vertical distance between the detection end and the bottom surface of the base when the discharge portion is in the detection position.

6. The feeding device according to claim 3, characterized in that: The discharging end and the detecting end move at least in a horizontal direction; And / or, the base includes a side surface, the side surface is used to be opposite to the material trough, and when the discharge portion is in the idle position, the vertical distance between the discharge end and the side surface is smaller than the vertical distance between the discharge end and the side surface when the discharge portion is in the detection position; And / or, the base includes a side surface, the side surface is opposite to the material trough, and when the discharge portion is in the idle position, the vertical distance between the detection end and the side surface is smaller than the vertical distance between the detection end and the side surface when the discharge portion is in the detection position.

7. The feeding device according to claim 3, characterized in that: The discharging part comprises a discharging channel and a discharging port which are connected to each other, the discharging port is located at the discharging end, the feeding part is connected to the discharging channel, and a notch is provided on the side wall of the discharging part connected to the discharging port; wherein: The notch includes at least one first notch, and the first notch is opened on a side of the discharge portion opposite to the base; And / or, the notch includes at least one second notch, and the second notch is opened at a position of the discharge portion opposite to the detection end.

8. The feeding device according to claim 3, characterized in that: The discharge portion extends in a single direction; Alternatively, the discharge portion includes a first extension portion and a second extension portion, the first extension portion is connected to the base, the second extension portion is connected to the first extension portion, the conductive member is connected to the second extension portion, the second extension portion includes the discharge end, and the extension directions of the first extension portion and the second extension portion are at a preset angle, the preset angle includes an angle of 90 degrees or any angle from 60 degrees to 120 degrees; the discharge portion also includes a third extension portion, and for the case where the discharge portion is in the detection position, the first extension portion extends from the base in a direction away from the base, the second extension portion extends from the first extension portion in a direction toward the material trough, and the third extension portion extends from the second extension portion in a direction toward the material trough; the cross-sectional area of ​​the third extension portion along a cross section parallel to the material trough is smaller than the cross-sectional area of ​​the second extension portion along a cross section parallel to the material trough; The third extension portion includes the discharge end, the conductive member is connected to the second extension portion and is located on at least one side of the third extension portion; when the discharge portion is in the detection position, the connection between the conductive member and the second extension portion is higher than the maximum material capacity of the material trough.

9. The feeding device according to claim 3, characterized in that: The feeding device also includes a driving mechanism, which is connected to the base, and the discharge part is connected to the driving mechanism, and the driving mechanism is used to drive the discharge part to move relative to the base so that the discharge part is located at the idle position or the detection position.

10. The feeding device according to claim 9, characterized in that: The driving mechanism is used to drive the discharging portion to rotate relative to the base so that the discharging portion is located at the idle position or the detection position; Alternatively, the driving mechanism is used to drive the discharging portion to move linearly relative to the base, so that the discharging portion is located at the idle position or the detection position.

11. The feeding device according to claim 10, characterized in that When the driving mechanism is used to drive the discharging part to move linearly relative to the base, The driving mechanism includes a driving member and a gear. The discharging portion is provided with meshing teeth. The discharging portion is meshed with the gear. The driving member is connected with the gear. The driving member is used to drive the gear to rotate and drive the discharging portion to move linearly. Alternatively, the discharge portion is slidably connected to the base and is limited in the circumferential direction of the discharge portion with the base, the driving mechanism comprises a driving member and a coil nut, the nut is sleeved on the outer wall of the discharge portion, and the nut is threadedly connected to the discharge portion, the driving member comprises an electromagnetic coil, and the driving member is used to drive the nut to rotate, so as to push the discharge portion to move linearly by the thread; Alternatively, the discharge part is slidably connected to the base and is limited in the circumferential direction of the discharge part by the base, the driving mechanism includes a driving member and a screw, the screw is inserted into the discharge part, and the screw is threadedly connected to the discharge part, and the driving member is used to drive the screw to rotate, so as to push the discharge part to move linearly with the thread.

12. The feeding device according to claim 9, characterized in that: The base includes an inner cavity and a clearance port connected to the inner cavity, the driving mechanism is located in the inner cavity, the discharge portion is connected to the clearance port, at least part of the discharge portion is located in the inner cavity to be connected to the driving mechanism, and when the discharge portion is in the detection position, at least part of the discharge portion is located outside the inner cavity, so that the discharge end and the detection end are located outside the inner cavity.

13. The feeding device according to claim 12, characterized in that: The base is provided with at least one vent, which is communicated with the inner cavity.

14. The feeding device according to claim 3, characterized in that: The feeding part includes a feeding pipe, and the feeding pipe is connected with the discharging part; The discharging part comprises a discharging channel, an intermediate interface and a discharging port, the discharging channel is communicated with the intermediate interface and the discharging port respectively, the discharging port is located at the discharging end, and the feeding pipe is communicated with the discharging channel through the intermediate interface; The base includes an inner cavity, and the middle interface is located in the inner cavity.

15. The feeding device according to claim 1, characterized in that The feeding device also includes: A conveying power member, the conveying power member is connected to the feeding device body, the conveying power member is used for forward driving to drive the material to be printed to feed into the material trough, and the conveying power member is also used for reverse driving to drive the material to be printed to be discharged from the material trough; Alternatively, a first power member and a second power member, wherein the first power member is used to drive the material to be printed to feed into the material trough, and the second power member is used to drive the material to be printed to be discharged from the material trough.

16. The feeding device according to claim 1, characterized in that The conductive member includes a first probe and a second probe, and the first probe and the second probe are connected to the feeding device body; The first probe and the second probe output the first electrical signal when they are in contact with the material to be cured in the material tank, and the second electrical signal is output when the first probe and the second probe do not contact with the material to be cured in the material tank.

17. The feeding device according to claim 3, characterized in that: The discharge part comprises a discharge channel and an intermediate interface, and the discharge channel is communicated with the intermediate interface; The base includes an inner cavity, and the middle interface is located in the inner cavity.

18. The feeding device according to claim 3, characterized in that An installation groove is provided on the outer wall of the discharge portion, and the conductive member is embedded in the installation groove; And / or, at least part of the length of the conductive member is exposed, and when the discharging portion is at the detection position, the connection between the exposed section and the non-exposed section of the conductive member is higher than the maximum material capacity of the material trough; Wherein, when the discharge portion is at the detection position, the detection end overlaps with the bottom surface of the trough in the vertical projection direction, and the discharge port overlaps with the bottom surface of the trough in the vertical projection direction.

19. The feeding device according to claim 3, characterized in that: The feeding device also includes: A detection member and a trigger member, one of which is connected to the base, and the other of which is connected to the discharge portion; The triggering member is used to trigger the detecting member to send a detection signal when the discharging portion is in at least one of the idle position and the detection position.

20. The feeding device according to claim 19, characterized in that The detection element includes a photoelectric sensor, and the trigger element includes a shielding element; Alternatively, the detection member includes a touch switch, and the trigger member includes a contact; Alternatively, the detection element includes a magnetic sensor, and the trigger element includes a magnetic element.

21. The feeding device according to claim 1, characterized in that The feeding device also includes: A main controller is connected to the feeding device body, and the main controller is at least electrically connected to the detection component.

22. The feeding device according to claim 21, characterized in that The main controller is provided with an electrical connection plug or an electrical connection socket, and the main controller is used for mechanically plugging and electrically connecting with the printer body of the light-curing 3D printer through the electrical connection plug or the electrical connection socket.

23. A 3D printer, characterized in that: Comprising a feeding device as described in any one of claims 1 to 22 above.

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