A light-cured 3D printer

Abstract

The application belongs to the technical field of 3D printers, and provides a light-curing 3D printer, which comprises a back plate assembly, a forming assembly, a trough assembly and a middle assembly; the forming assembly comprises a platform plate, a building plate and four leveling detection assemblies; the platform plate is connected with the back plate assembly, the building plate is located on the side of the platform plate facing the trough assembly; four leveling detection assemblies are located between the platform plate and the building plate and are distributed in a rectangular shape; each leveling detection assembly comprises a mechanical sensor for detecting the pressure borne by the building plate and an adjusting piece for adjusting the vertical position of the building plate, and the adjusting piece corresponds to the detection position of the mechanical sensor; the printer of the application can precisely and stably adjust the building platform, and is simple to operate and good in consistency.

Description

TECHNICAL FIELD

[0001] The application belongs to the field of 3D printing technology, and particularly relates to a light-curing 3D printer. BACKGROUND

[0002] In the process of light-curing 3D printing, a high-definition screen on a printing platform displays the geometric shape of a single layer of a printed part, a vat containing liquid photosensitive resin is placed above the printing platform, a build platform is immersed in the vat, and a single layer curing gap is left between the build platform and the printing platform. The light on the screen irradiates into the resin through a transparent release film at the bottom of the vat, so that the resin is cured and adheres to the build platform, and the area not affected by the light beam remains liquid. The build platform on which the single layer curing has been completed is moved upward by a vertical screw, so that the build platform is separated from the printing platform; the liquid resin will quickly fill the space separated in the middle; when the build platform is separated upward to a certain height, the liquid resin fills the gap between the two platforms, the build platform is lowered and kept with the printing platform at the gap required for single curing, which prepares for the printing of the next layer. The vertical separation process is crucial to maintaining the accuracy and quality of the part, and the build platform needs to be stably installed and the gap of each curing of the printing platform needs to be exactly the same, so as to ensure the quality of the part printing.

[0003] Therefore, the build platform needs to be accurately leveled to ensure that its bottom surface is highly parallel to the surface of the printer screen (or release film) and the gap is uniform. However, the leveling of most build platforms in the prior art still adopts traditional manual operation, which needs to be adjusted and tested repeatedly, and the efficiency is low and the accuracy is difficult to guarantee, and the phenomenon of adhesion of the first layer of printing, bottom warping, uneven layer lines, etc. may occur due to the uneven build platform and the printer screen or release film. SUMMARY

[0004] In order to overcome the above-mentioned shortcomings of the prior art, the purpose of the present application is to provide a light-curing 3D printer which can accurately and stably adjust the build platform and has simple operation and good consistency.

[0005] The technical scheme adopted by the application to solve its technical problems is:

[0006] A light-curing 3D printer, comprising a back plate assembly, a forming assembly, a vat assembly and a middle assembly; the forming assembly is arranged on the back plate assembly, the vat assembly is arranged on the middle assembly, and the forming assembly is located above the vat assembly; wherein,

[0007] The forming assembly comprises a platform plate, a build plate and four leveling detection assemblies; the platform plate is connected with the back plate assembly, the build plate is located on the side of the platform plate facing the trough assembly; four leveling detection assemblies are located between the platform plate and the build plate and are distributed in a rectangular shape, each leveling detection assembly comprises a mechanical sensor for detecting the pressure on the build plate and an adjusting piece for adjusting the vertical position of the build plate, and the adjusting piece corresponds to the detection position of the mechanical sensor.

[0008] In a preferred embodiment of the present application, each leveling detection assembly further comprises a support column and a buffer elastic piece; one end of the support column is connected with the mechanical sensor, and the other end of the support column extends upward in the vertical direction; the adjusting piece is threadedly connected with the support column; and the buffer elastic piece acts between the support column and the platform plate.

[0009] Preferably, the platform plate is provided with an assembly hole corresponding to the adjusting piece of each leveling detection assembly, the lower end of the assembly hole is provided with a support surface, the upper end of the support column extends into the assembly hole, the adjusting piece is located in the assembly hole and is threadedly connected with the support column, the adjusting piece is provided with a limiting piece supported on the top of the assembly hole, and each leveling detection assembly further comprises an anti-loosening elastic piece located in the assembly hole and abutting against the support surface and the limiting piece at both ends.

[0010] Preferably, the assembly hole is further provided with a relief hole coaxially arranged above the assembly hole, the relief hole is larger than the assembly hole, and the end of the adjusting piece and the limiting piece are located in the relief hole.

[0011] In a preferred embodiment of the present application, the mechanical sensor is in the form of a plate; the middle part of the mechanical sensor is provided with a connecting part connected with the support column, the mechanical sensor is provided with a first hollow groove and a second hollow groove in the form of a U-shaped and allowing the connecting part to be bent and deformed, the first hollow groove and the second hollow groove are opposite in direction, and the second hollow groove is smaller than the first hollow groove.

[0012] Preferably, the platform plate is provided with a connecting block group corresponding to each mechanical sensor, each connecting block group is protrudingly arranged on the platform plate, each connecting block group comprises four connecting blocks and corresponds to each edge angle of the mechanical sensor, and each mechanical sensor is connected with each connecting block group one by one.

[0013] In one preferred embodiment of the present application, the horizontal limiting member is in the form of a sheet and is connected to the build plate by a connecting column; the connecting column is fixed to the side of the build plate facing the platform plate; one end of the horizontal limiting member is connected to the top of the connecting column, and the other end of the horizontal limiting member extends horizontally; the support column is limited by the side surface of the horizontal limiting member.

[0014] Preferably, the horizontal limiting member is in the form of a sheet and is connected to the build plate by a connecting column; the connecting column is fixed to the side of the build plate facing the platform plate; one end of the horizontal limiting member is connected to the top of the connecting column, and the other end of the horizontal limiting member extends horizontally; the support column is limited by the side surface of the horizontal limiting member.

[0015] In one preferred embodiment of the present application, the top of the forming assembly is provided with a first connecting table, and the back plate assembly is provided with a second connecting table; the first connecting table is detachably connected to the second connecting table.

[0016] Preferably, the side of the first connecting table facing the second connecting table is provided with a fitting cavity matched with the first connecting table; the bottom of the fitting cavity is provided with a limiting groove; and two limiting portions are arranged above the limiting groove, and a through groove is formed between the two limiting portions.

[0017] The second connecting table comprises a frame body, a pull rod, and a handle; one end of the handle is provided with an eccentric block, which is rotatably arranged on the frame body; one end of the pull rod is connected to the handle at one end of the frame body; the other end of the pull rod extends downward and protrudes from the frame body and is provided with a baffle; and a pre-tightening elastic element is arranged between the pull rod and the bottom of the frame body.

[0018] Compared with the prior art, the present application has the following advantages:

[0019] In the present application, four leveling detection assemblies are arranged between the build plate and the platform plate, and the mechanical sensors in the leveling detection assemblies are used to detect the pressure of four points of the build plate; the inclination of the build plate can be accurately judged by the difference in pressure values; and the different points of the build plate can be accurately adjusted by the adjusting member according to the change in pressure values, so that the build plate can be leveled quickly, efficiently and accurately, which is beneficial to improving the printing effect and reducing the phenomena of unfirm adhesion of the first layer, warping of the bottom, and uneven layer lines.

[0020] The mechanical sensor of the leveling detection assembly of the application can be electrically connected with the processing system of the printer, the mechanical sensor transmits the detected pressure data to the processing system in real time, the processing system calculates and analyzes the obtained pressure data, for example, the pressure data detected by each mechanical sensor can be calculated by difference, so as to obtain which one or more mechanical sensors corresponding to the adjusting member needs to be adjusted, and the adjusting member that needs to be adjusted and the adjusting amount thereof are displayed on the display interface of the printer, so that the user can more intuitively know the related adjusting information. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative labor.

[0022] Figure 1 It is a perspective view of the light-cured 3D printer of the application.

[0023] Figure 2 It is Figure 1 It is a perspective view of the molding assembly and the second connecting table.

[0024] Figure 3 It is an exploded view of the molding assembly and the second connecting table.

[0025] Figure 4 It is an exploded view of the leveling detection assembly.

[0026] Figure 5 It is a partial exploded view of the molding assembly.

[0027] Figure 6 It is a partial sectional view of the molding assembly.

[0028] Figure 7 It is an exploded view of the first connecting table and the second connecting table.

[0029] Figure 8 It is an assembly schematic view of the first connecting table and the second connecting table.

[0030] Figure 9 It is a partial sectional view of the first connecting table and the second connecting table when assembled.

[0031] Among them:

[0032] 1-back plate assembly;

[0033] 2-molding assembly, 201-housing, 202-platform plate, 203-building plate, 204-groove, 205-decorative plate;

[0034] 3- trough assembly;

[0035] 4- middle assembly;

[0036] 5- leveling detection assembly, 501- adjusting piece, 5011- limiting sheet, 502- anti-looseness elastic piece, 503- buffer elastic piece, 504- support column, 505- mechanical sensor, 5051- first hollow groove, 5052- second hollow groove, 5053- connecting part, 5054- connecting hole;

[0037] 6- horizontal limiting piece;

[0038] 7- connecting column;

[0039] 8- first connecting table, 801- upper shell, 8011- assembling cavity, 802- fixed platform, 8021- limiting groove, 8022- limiting part, 8023- through groove;

[0040] 9- second connecting table, 901- handle, 902- pull rod, 9021- baffle, 903- eccentric block, 904- pre-tightening elastic element, 905- positioning block, 9051- recess, 906- locking bolt, 907- connecting shaft, 9071- mounting hole, 908- shell, 909- seat body;

[0041] 10- assembling hole;

[0042] 11- avoiding hole;

[0043] 12- connecting block. DETAILED DESCRIPTION

[0044] In order to enable the above objects, features and advantages of the present application to be more clearly understood, the following will be given, with reference to the attached drawings and specific embodiments. It should be noted that the embodiments and features of the embodiments in the present application can be combined with each other in the case of no conflict. In the following description, a lot of specific details are described in order to facilitate a full understanding of the present application, and the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0045] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0046] Reference Figures 1-9The embodiment discloses a light-curing 3D printer, which comprises a back plate assembly 1, a forming assembly 2, a trough assembly 3 and a middle assembly 4, etc. The forming assembly 2 is arranged on the back plate assembly 1, the trough assembly 3 is arranged on the middle assembly 4, and the forming assembly 2 is above the trough assembly 3. The light-curing 3D printer of the embodiment can accurately detect the posture of the build plate 203 and adjust the posture so that the build plate 203 and the screen of the printer are parallel to each other to meet the printing requirements. The innovative leveling design of the application will be described in detail below, and other parts of the light-curing 3D printer can refer to the prior art. For example, the back plate assembly 1 generally comprises a lifting part and a driving part, which can drive the forming assembly 2 to vertically lift; the trough assembly 3 can comprise a trough, which is used for storing resin and other media.

[0047] The forming assembly 2 of the embodiment comprises a shell 201, a platform plate 202, a build plate 203 and four leveling detection assemblies 5, etc. The platform plate 202 is connected with the back plate assembly 1, and the build plate 203 is located on the side of the platform plate 202 facing the trough assembly 3. The four leveling detection assemblies 5 are located between the platform plate 202 and the build plate 203 and are distributed in a rectangular shape. Each leveling detection assembly 5 comprises a mechanical sensor 505 for detecting the pressure on the build plate 203, an adjusting part 501 for adjusting the vertical position of the build plate 203, a support column 504 and a buffer elastic part 503. The adjusting part 501 corresponds to the detection position of the mechanical sensor 505. One end of the support column 504 is connected with the mechanical sensor 505, and the other end of the support column 504 extends upward along the vertical direction. The adjusting part 501 is threadedly connected with the support column 504. The buffer elastic part 503 acts between the support column 504 and the platform plate 202.

[0048] The buffer elastic part 503 of the embodiment can be a spring, which is sleeved on the support column 504, and one end of the buffer elastic part 503 abuts against the step at the lower end of the support column 504, and the other end abuts against the bottom of the platform plate 202. In this way, when the platform plate 202 drives the build plate 203 to press the screen of the printer, the buffer elastic part 503 plays a role of elastic buffering, reducing the possibility of rigid contact and damage between the build plate 203, the platform plate 202 and the screen. The embodiment adopts the threaded connection between the adjusting part 501 and the support column 504, and adjusts the length of the support column 504 by rotating the adjusting part 501, so as to change the height of the four positions of the build plate 203, realize rapid leveling and simple and accurate operation.

[0049] Further, the platform plate 202 of the embodiment is provided with an assembly hole 10 at the corresponding position of the adjusting member 501 of each leveling detection assembly 5, and the lower end of the assembly hole 10 is provided with a supporting surface; the upper end of the supporting column 504 extends into the assembly hole 10, the adjusting member 501 is located in the assembly hole 10 and is threadedly connected with the supporting column 504; the adjusting member 501 is provided with a limiting piece 5011 which is supported on the top of the assembly hole 10. Each leveling detection assembly 5 further comprises an anti-loosening elastic member 502 which is located in the assembly hole 10 and has two ends respectively abutting against the supporting surface and the limiting piece 5011.

[0050] Further, the assembly hole 10 is further provided with a relief hole 11 which is coaxially arranged above the assembly hole 10, the relief hole 11 is larger than the assembly hole 10, and the end of the adjusting member 501 and the limiting piece 5011 are located in the relief hole 11. In this way, the entire adjusting member 501 can be hidden in the platform plate 202 without protruding, so that the surface of the platform plate 202 is kept flat. Further, the embodiment is provided with a groove 204 on each side of the platform plate 202, two adjusting members 501 are correspondingly arranged in each groove 204, and a detachable decorative plate 205 is arranged at the groove 204, and the detachable decorative plate 205 can be detachably arranged with the groove 204 or the platform plate 202 through a buckle or other structure. After the decorative plate 205 is covered on the groove 204, the surface of the platform plate 202 and the decorative plate 205 form an integral whole, and the adjusting member 501 can be shielded and protected. The anti-loosening elastic member 502 of the embodiment can be a spring, and the anti-loosening elastic member 502 can form a mutual tightening effect with the buffer elastic member 503, so as to effectively prevent the loosening between the build plate 203 and the platform plate 202, and the two can be tightly fixed while having a buffering effect and being capable of being adjusted in the vertical direction.

[0051] The mechanical sensor 505 of the embodiment adopts a plate structure, and a connecting portion 5053 connected with the supporting column 504 is arranged in the middle portion of the mechanical sensor 505. The mechanical sensor 505 is provided with a first hollow groove 5051 and a second hollow groove 5052 which are in a U shape and allow the connecting portion 5053 to be deformed, the directions of the first hollow groove 5051 and the second hollow groove 5052 are opposite, and the second hollow groove 5052 is smaller than the first hollow groove 5051. Specifically, in order to facilitate the connection with the supporting column 504, the connecting portion 5053 is provided with a connecting hole 5054, and the connecting portion 5053 and the supporting column 504 can be locked and fixed through screws, bolts or other parts through the connecting hole 5054. In this way, when the build plate 203 is pressed on the screen of the printer, the force condition of the point can be obtained through the deformation of the connecting portion 5053 on the mechanical sensor 505, and the structure is simple and reliable and the installation is convenient.

[0052] The platform plate 202 of the embodiment is provided with a connecting block group at the corresponding position of each mechanical sensor 505. Each connecting block group is protrudingly arranged on the platform plate 202, each connecting block group includes four connecting blocks 12 and corresponds to each edge angle of the mechanical sensor 505; each mechanical sensor 505 is connected with each connecting block group one by one. By arranging the connecting block group on the platform plate 202, the connection and fixation with the mechanical sensor 505 are facilitated, and such connection mode enables the plate-shaped mechanical sensor 505 to have better deformation capability, thereby improving the detection precision. The connecting block 12 of the embodiment can be a nut or other structure, a through hole can be arranged at each edge of the mechanical sensor 505, and a screw, a bolt or other parts are used to complete the connection and fixation between the mechanical sensor 505 and the connecting block 12.

[0053] To prevent the build plate 203 from being deviated in the horizontal direction, the embodiment is further provided with a horizontal limiting piece 6. The horizontal limiting piece 6 should be arranged at least twice, each horizontal limiting piece 6 is arranged on the build plate 203 and corresponds to a different leveling detection assembly 5, and the horizontal limiting piece 6 is located on one side of the support column 504 to limit the deviation of the support column 504 in the horizontal direction. The arrangement of the horizontal limiting piece 6 can ensure that the build plate 203 has a stable and reliable horizontal position during the vertical direction adjustment process, and prevent the build plate 203 from moving in the horizontal direction. Further, the horizontal limiting piece 6 of the embodiment should be arranged at least twice, so that the build plate 203 can be limited by two different limiting points. Of course, the number of horizontal limiting pieces 6 can also be flexibly adjusted, such as three or four, etc. In the embodiment, four horizontal limiting pieces 6 are arranged and correspond to four leveling detection assemblies 5 one by one.

[0054] Further, the horizontal limiting piece 6 is in a sheet shape and is connected with the build plate 203 through a connecting column 7. The connecting column 7 is fixed on the side of the build plate 203 facing the platform plate 202, one end of the horizontal limiting piece 6 is connected with the top of the connecting column 7, and the other end of the horizontal limiting piece 6 extends horizontally. The support column 504 and the side surface of the horizontal limiting piece 6 limit each other.

[0055] Further, the horizontal limiting piece 6 of the embodiment adopts a spring sheet structure and is connected with the build plate 203 through the connecting column 7. Specifically, the connecting column 7 is fixed on the side of the build plate 203 facing the platform plate 202, and one end of the horizontal limiting piece 6 is locked and fixed with the top of the connecting column 7 through a screw, a bolt or other parts. The other end of the horizontal limiting piece 6 extends horizontally. The support column 504 contacts or abuts against the side surface of the horizontal limiting piece 6, thereby playing a horizontal limiting role.

[0056] The top of the forming assembly 2 is provided with a first connecting table 8, the back plate assembly 1 is provided with a second connecting table 9, and the first connecting table 8 is detachably connected with the second connecting table 9. The side of the first connecting table 8 facing the second connecting table 9 is provided with an assembly cavity 8011 matched with the first connecting table 8, the bottom of the assembly cavity 8011 is provided with a limiting groove 8021, and the limiting groove 8021 is provided with limiting portions 8022 on both sides, and a through groove 8023 is formed between the two limiting portions 8022. The first connecting table 8 of the embodiment comprises a fixed platform 802 and an upper shell 801, the fixed platform 802 is fixed with the platform plate 202, and the upper shell 801 is arranged on the top of the fixed platform 802. The second connecting table 9 comprises a frame body, a pull rod 902 and a handle 901, one end of the handle 901 is provided with an eccentric block 903, the eccentric block 903 is rotatably arranged on the frame body, one end of the pull rod 902 is connected with the handle 901 at one end of the frame body, the other end of the pull rod 902 extends downward and protrudes from the frame body and is provided with a baffle 9021, and a pre-tightening elastic element 904 is arranged between the pull rod 902 and the bottom of the frame body.

[0057] When it is needed to assemble the forming assembly 2 to the back plate assembly 1, the assembly cavity 8011 of the first connecting table 8 is aligned with the second connecting table 9, the second connecting table 9 is inserted into the assembly cavity 8011, the baffle 9021 at the lower end of the pull rod 902 is inserted into the limiting groove 8021 during the insertion process, and the pull rod 902 passes through the through groove 8023, at this time, the baffle 9021 and the limiting portions 8022 on the limiting groove 8021 are pre-positioned. Then, the handle 901 is moved, the eccentric block 903 is rotated on the frame body, the pull rod 902 is moved upward by the action of the eccentric block 903 to overcome the elastic force of the pre-tightening elastic element 904, and finally the baffle 9021 on the limiting rod and the limiting portions 8022 on the limiting groove 8021 are clamped with each other, the mutual locking and fixing between the forming assembly 2 and the back plate assembly 1 is completed. Similarly, when it is needed to disassemble the forming assembly 2, the handle 901 is moved in the opposite direction.

[0058] Further, the frame body in the embodiment is provided with a positioning block 905, the eccentric block 903 at the end of the handle 901 is arranged on the positioning block 905, the positioning block 905 is provided with a smooth recess 9051, so that the eccentric block 903 can rotate better. In addition, the positioning block 905 in the embodiment is provided with a connecting shaft 907, the connecting shaft 907 is provided with a mounting hole 9071, the upper end of the pull rod 902 is matched with the mounting hole 9071, and the connection between the eccentric block 903 and the pull rod 902 is realized. The pre-tightening elastic element 904 of the embodiment can adopt a spring, and a step is arranged on the pull rod 902, so as to facilitate the sleeving and positioning of the pre-tightening elastic element 904.

[0059] The frame body in the embodiment includes a shell 908 and a seat body 909, the shell 908 is fixed outside the seat body 909 through a locking bolt 906, and the assembly of the seat body 909 and the shell 908 can better assemble the handle 901, the pull rod 902 and the positioning block 905. The detachable locking and fixing mode of the first connecting table 8 and the second connecting table 9 in the embodiment can also refer to the detachable structure of the prior art.

[0060] The leveling process of the photocuring 3D printer in the embodiment can be divided into manual leveling and automatic leveling.

[0061] When the manual leveling is performed, the back plate assembly 1 drives the forming assembly 2 to move downward and press against the printer screen, and the forming assembly 2 automatically stops when the downward moving distance of the forming assembly 2 reaches a set threshold value; the mechanical sensors 505 of the four leveling detection assemblies 5 of the forming assembly 2 transmit and display the detected pressure values on the display interface of the printer in real time; at this time, the processing system of the printer processes and analyzes the pressure values detected by the four mechanical sensors 505, obtains the required adjustment amount of one or more adjustment members 501 and displays the adjustment amount on the display interface, the user adjusts the corresponding adjustment member 501 according to the prompt on the display interface, and the manual leveling is completed until the pressure values detected by the four mechanical sensors 505 tend to and finally reach the preset same target pressure value; after the manual leveling is completed, the back plate assembly 1 drives the forming assembly 2 to rise and enter a ready-to-print state. After the printing starts, the automatic leveling process of the equipment is performed, and the printing starts after the leveling.

[0062] When the automatic leveling is performed, the back plate assembly 1 drives the forming assembly 2 to move downward and press against the printer screen, and the forming assembly 2 automatically stops when the downward moving distance of the forming assembly 2 reaches a set threshold value, and is static for a preset time to allow the four mechanical sensors 505 to measure the stress of the build plate 203, and transmit the obtained four pressure values to the processing system of the printer; the processing system judges the degree of the build plate 203 pressing the printer screen downward according to the pressure values, and feeds back to the back plate assembly 1, which drives the forming assembly 2 to automatically compensate in the vertical direction under the drive of the back plate assembly 1, so that the gap between the build plate 203 and the printer screen can be maintained within a stable and accurate tolerance value during each printing. When the pressure values detected by the four mechanical sensors 505 are consistent and stable within the preset tolerance range, the system determines that the automatic leveling is completed and enters the printing process.

[0063] The processing system, display interface and the like of the printer can refer to the prior art, for example, the processing system can be a processor having functions of calculation, data processing, data receiving and issuing, and the display interface can be a display screen or a client such as a mobile phone, a computer or the like which can be wirelessly connected with the printer.

[0064] The above is only the preferred embodiment of the present application, and does not limit the present application in any form. Any modification, equivalent change and modification of the above embodiment based on the technical essence of the present application, without departing from the technical solution content of the present application, still belongs to the scope of the technical solution of the present application.

Claims

1. A light-cured 3D printer, comprising a backboard assembly, a forming assembly, a vat assembly and a middle assembly; the forming assembly is arranged on the backboard assembly, the vat assembly is arranged on the middle assembly, and the forming assembly is above the vat assembly; characterized in that, the forming assembly comprises a platform plate, a build plate and four leveling detection assemblies; the platform plate is connected with the backboard assembly, the build plate is located on the side of the platform plate facing the vat assembly; four leveling detection assemblies are located between the platform plate and the build plate and are distributed in a rectangular shape, each leveling detection assembly comprises a mechanical sensor for detecting the pressure on the build plate and an adjusting piece for adjusting the vertical position of the build plate, and the adjusting piece corresponds to the detection position of the mechanical sensor; each leveling detection assembly further comprises a support column and a buffer elastic piece; one end of the support column is connected with the mechanical sensor, and the other end of the support column extends upward in the vertical direction; the adjusting piece is threadedly connected with the support column; the buffer elastic piece acts between the support column and the platform plate; the corresponding positions of the platform plate and the adjusting pieces of each leveling detection assembly are each provided with an assembly hole, and the lower end of the assembly hole is provided with a support surface; the upper end of the support column extends into the assembly hole, the adjusting piece is located in the assembly hole and is threadedly connected with the support column; the adjusting piece is provided with a limiting piece which is supported on the top of the assembly hole; each leveling detection assembly further comprises an anti-loosening elastic piece, which is located in the assembly hole and has two ends respectively abutting against the support surface and the limiting piece; the mechanical sensor is in the shape of a plate; the middle part of the mechanical sensor is provided with a connecting part connected with the support column, the mechanical sensor is provided with a first hollow groove and a second hollow groove in the shape of U and allowing the connecting part to be bent and deformed, the directions of the first hollow groove and the second hollow groove are opposite, and the second hollow groove is smaller than the first hollow groove.

2. The light-cured 3D printer according to claim 1, characterized in that, the corresponding positions of the platform plate and the adjusting pieces of each leveling detection assembly are each provided with an assembly hole, and the lower end of the assembly hole is provided with a support surface; the upper end of the support column extends into the assembly hole, the adjusting piece is located in the assembly hole and is threadedly connected with the support column; the adjusting piece is provided with a limiting piece which is supported on the top of the assembly hole; each leveling detection assembly further comprises an anti-loosening elastic piece, which is located in the assembly hole and has two ends respectively abutting against the support surface and the limiting piece; 3. The light-cured 3D printer of claim 1, wherein, the corresponding positions of the platform plate and the adjusting pieces of each leveling detection assembly are each provided with an assembly hole, and the lower end of the assembly hole is provided with a support surface; the upper end of the support column extends into the assembly hole, the adjusting piece is located in the assembly hole and is threadedly connected with the support column; the adjusting piece is provided with a limiting piece which is supported on the top of the assembly hole; each leveling detection assembly further comprises an anti-loosening elastic piece, which is located in the assembly hole and has two ends respectively abutting against the support surface and the limiting piece; 4. The light-curing 3D printer according to any one of claims 1 or 2, characterized in that, the corresponding positions of the platform plate and the adjusting pieces of each leveling detection assembly are each provided with an assembly hole, and the lower end of the assembly hole is provided with a support surface; the upper end of the support column extends into the assembly hole, the adjusting piece is located in the assembly hole and is threadedly connected with the support column; the adjusting piece is provided with a limiting piece which is supported on the top of the assembly hole; each leveling detection assembly further comprises an anti-loosening elastic piece, which is located in the assembly hole and has two ends respectively abutting against the support surface and the limiting piece; the corresponding positions of the platform plate and the adjusting pieces of each leveling detection assembly are each provided with an assembly hole, and the lower end of the assembly hole is provided with a support surface; the upper end of the support column extends into the assembly hole, the adjusting piece is located in the assembly hole and is threadedly connected with the support column; the adjusting piece is provided with a limiting piece which is supported on the top of the assembly hole; each leveling detection assembly further comprises an anti-loosening elastic piece, which is located in the assembly hole and has two ends respectively abutting against the support surface and the limiting piece; the corresponding positions of the platform plate and the adjusting pieces of each leveling detection assembly are each provided with an assembly hole, and the lower end of the assembly hole is provided with a support surface; the upper end of the support column extends into the assembly hole, the adjusting piece is located in the assembly hole and is threadedly connected with the support column; the adjusting piece is provided with a limiting piece which is supported on the top of the assembly hole; each leveling detection assembly further comprises an anti-loosening elastic piece, which is located in the assembly hole and has two ends respectively abutting against the support surface and the limiting piece; the corresponding positions of the platform plate and the adjusting pieces of each leveling detection assembly are each provided with an assembly hole, and the lower end of the assembly hole is provided with a support surface; the upper end of the support column extends into the assembly hole, the adjusting piece is located in the assembly hole and is threadedly connected with the support column; the adjusting piece is provided with a limiting piece which is supported on the top of the assembly hole; each leveling detection assembly further comprises an anti-loosening elastic piece, which is located in the assembly hole and has two ends respectively abutting against the support surface and the limiting piece; the corresponding positions of the platform plate and the adjusting pieces of each leveling detection assembly are each provided with an assembly hole, and the lower end of the assembly hole is provided with a support surface; the upper end of the support column extends into the assembly hole, the adjusting piece is located in the assembly hole and is threadedly connected with the support column; the adjusting piece is provided with a limiting piece which is supported on the top of the assembly hole; each leveling detection assembly further comprises an anti-loosening elastic piece, which is located in the assembly hole and has two ends respectively abutting against the support surface and the limiting piece; the corresponding positions of the platform plate and the adjusting pieces of each leveling detection assembly are each provided with an assembly hole, and the lower end of the assembly hole is provided with a support surface; the upper end of the support column extends into the assembly hole, the adjusting piece is located in the assembly hole and is threadedly connected with the support column; the adjusting piece is provided with a limiting piece which is supported on the top of the assembly hole; each leveling detection assembly further comprises an anti-loosening elastic piece, which is located in the assembly hole and has two ends respectively abutting against the support surface and the limiting piece; the corresponding positions of the platform plate and the adjusting pieces of each leveling detection assembly are each provided with an assembly hole, and the lower end of the assembly hole is provided with a support surface; the upper end of the support column extends into the assembly hole, the adjusting piece is located in the assembly hole and is threadedly connected with the support column; the adjusting piece is provided with a limiting piece which is supported on the top of the assembly hole; each leveling detection assembly further comprises an anti-loosening elastic piece, which is located in the assembly hole and has two ends respectively abutting against the support surface and the limiting piece; the corresponding positions of the platform plate and the adjusting pieces of each leveling detection assembly are each provided with an assembly hole, and the lower end of the assembly hole is provided with a support surface; the upper end of the support column extends into the assembly hole, the adjusting piece is located in the assembly hole and is threadedly connected with the support column; the adjusting piece is provided with a limiting piece which is supported on the top of the assembly hole; each leveling detection assembly further comprises an anti-loosening elastic piece, which is located in the assembly hole and has two ends respectively abutting against the support surface and the limiting piece; the corresponding positions of the platform plate and the adjusting pieces of each leveling detection assembly are each provided with an assembly hole, and the lower end of the assembly hole is provided with a support surface; the upper end of the support column extends into the assembly hole, the adjusting piece is located in the assembly hole and is threadedly connected with the support column; the adjusting piece is provided with a limiting piece which is supported on the top of the assembly hole; each leveling detection assembly further comprises an anti-loosening elastic piece, which is located in the assembly hole and has two ends respectively abutting against the support surface and the limiting piece; the corresponding positions of the platform plate and the adjusting pieces of each leveling detection assembly are each provided with an assembly hole, and the lower end of the assembly hole is provided with a support surface; the upper end of the support column extends into the assembly hole, the adjusting piece is located in the assembly hole and is threadedly connected with the support column; the adjusting piece is provided with a limiting piece which is supported on the top of the assembly hole; each leveling detection assembly further comprises an anti-loosening elastic piece, which is located in the assembly hole and has two ends respectively abutting against the support surface and the limiting piece; the corresponding positions of the platform plate and the adjusting pieces of each leveling detection assembly are each provided with an assembly hole, and the lower end of the assembly hole is provided with a support surface; the upper end of the support column extends into the assembly 5. The light-cured 3D printer according to claim 4, characterized in that, The horizontal limiting piece is in a sheet shape, is connected with the build plate through a connecting column, the connecting column is fixed on the side of the build plate facing the platform plate, one end of the horizontal limiting piece is connected with the top of the connecting column, and the other end of the horizontal limiting piece extends horizontally; and the supporting column and the side surface of the horizontal limiting piece are limited to each other.

6. The light-cured 3D printer of claim 1, wherein, The top of the forming assembly is provided with a first connecting table, the back plate assembly is provided with a second connecting table, and the first connecting table and the second connecting table are detachably connected.

7. The light-cured 3D printer according to claim 6, characterized in that, The side of the first connecting table facing the second connecting table is provided with an assembly cavity matched with the second connecting table, the bottom of the assembly cavity is provided with a limiting groove, the two sides above the limiting groove are provided with limiting portions, and a through groove is formed between the two limiting portions; the second connecting table comprises a frame body, a pull rod and a handle; one end of the handle is provided with an eccentric block, the eccentric block is rotatably arranged on the frame body; one end of the pull rod is connected with the handle at one end of the frame body, the other end of the pull rod extends downward and protrudes from the frame body and is provided with a baffle; and a pre-tightening elastic element is arranged between the pull rod and the bottom of the frame body.

Images