Three-dimensional printer

Abstract

The utility model discloses a three-dimensional printer, relates to the technical field of three-dimensional printing equipment, and mainly aims to improve the leveling precision of the printer so as to improve the printing quality of a model. According to the main technical scheme, the three-dimensional printer comprises a fixing plate, and the fixing plate is fixedly arranged on a printer body of the three-dimensional printer; the floating plate is arranged on the fixed plate in a floating manner; and the first detection piece is connected with the floating plate and is used for detecting the displacement of the floating plate relative to the fixed plate or the stress of the floating plate.

Description

Technical Field

[0001] The utility model relates to the technical field of three-dimensional printing equipment, in particular to a three-dimensional printer. Background Art

[0002] Photocuring 3D printers generally apply light to photosensitive materials through a light source so that the liquid photosensitive material solidifies layer by layer, thereby forming a 3D solid model. In order to ensure the printing quality of the model, it is usually necessary to level the printer before printing. In the related art, during the leveling operation, the cantilever descends until the printing platform and the LCD screen are in contact, and the stepper motor drives the opening and closing clamps to hold the rotating ball, thereby locking the printing platform. In the above-mentioned leveling process, the printing platform contacts the LCD screen by virtue of the descent of the cantilever. When the printing platform contacts the LCD screen, it is impossible to determine whether the printing platform is completely in contact with the LCD screen. If the printing platform and the LCD screen are not completely in contact, then after the printing platform is locked, the printing platform and the LCD screen may not be parallel to each other, thereby reducing the leveling accuracy and also reducing the printing quality of the model.

[0003] FDM printers also face similar leveling problems. For example, the printing plane of the FDM printer must be parallel to the moving plane of the nozzle.

[0004] Whether it is a light-curing printer or an FDM printer, there is a leveling problem. How to ensure the leveling of the adjustable surface is a problem that 3D printers need to solve. Utility Model Content

[0005] In view of this, an embodiment of the utility model provides a three-dimensional printer, the main purpose of which is to improve the leveling accuracy of the printer.

[0006] In order to achieve the above purpose, the utility model mainly provides the following technical solutions:

[0007] The present invention provides a three-dimensional printer, comprising:

[0008] A fixing plate, the fixing plate being fixedly arranged on the body of the 3D printer;

[0009] A floating plate, wherein the floating plate is floatably disposed on the fixed plate;

[0010] A first detection member is connected to the floating plate and is used to detect the displacement of the floating plate relative to the fixed plate, or the force applied to the floating plate.

[0011] Optionally, the body comprises:

[0012] Base;

[0013] A vertical moving mechanism, wherein the vertical moving mechanism is arranged on the base;

[0014] The printing platform is connected to the vertical moving mechanism, and the vertical moving mechanism drives the printing platform to move relative to the base. The printing platform includes the fixed plate and the floating plate, and the fixed plate is fixedly connected to the vertical moving mechanism.

[0015] Optionally, a material trough is provided on the base, one side of the floating plate is a printing plane, the printing plane is arranged opposite to the material trough, and the printing plane is used to connect the printing model.

[0016] Optionally, the body comprises:

[0017] Base;

[0018] An upper bottom plate, the upper bottom plate is arranged on the base, the upper bottom plate comprises the fixed plate and the floating plate, and an exposure screen is mounted on the floating plate;

[0019] A printing component is arranged on the upper base plate.

[0020] Optionally, there are multiple first detection members, and the multiple first detection members are arranged at multiple corresponding detection positions on the floating plate. The multiple detection positions are arranged at intervals along the circumference of the floating plate. The first detection members are used to detect the displacement of the floating plate relative to the fixed plate at the detection position, or the force applied to the floating plate at the detection position.

[0021] Optionally, one end of the first detection member is connected to the floating plate, and the other end of the first detection member is connected to the fixed plate, and the first detection member includes a deformation part and a sensing part, the deformation part can generate a first deformation amount as the floating plate moves relative to the fixed plate, and the sensing part can sense the first deformation amount and generate a first electrical signal corresponding to the first deformation amount.

[0022] Optionally, the first detection member includes a first connecting member, and the first connecting member includes a first fixing portion, a second fixing portion and the deformation portion;

[0023] One end of the deformable portion is connected to the floating plate through the first fixing portion, and the other end of the deformable portion is connected to the fixing plate through the second fixing portion;

[0024] The sensing portion includes a first strain gauge, and at least a portion of the first strain gauge is in close contact with the deformation portion, or each portion of the first strain gauge is in close contact with the deformation portion.

[0025] Optionally, the first detection component includes:

[0026] a mounting seat and a second connecting member;

[0027] The sensing portion includes a second strain gauge, and the second strain gauge is arranged on the mounting seat;

[0028] The second connecting member includes a third fixing portion, a fourth fixing portion and the deformation portion;

[0029] One end of the deformation part is connected to the floating plate through the third fixing part, and the fixing plate and the mounting seat are both connected to the deformation part through the fourth fixing part;

[0030] The third fixing portion abuts against the second strain gauge.

[0031] Optionally, the second strain gauge includes a connecting piece and a deformation piece movably connected to the connecting piece;

[0032] The mounting seat is provided with a receiving groove, the receiving groove is opposite to the deformable sheet, and the receiving groove is used to provide a movement space for the movement of the deformable sheet;

[0033] The first end of the second connecting member abuts against the deformable sheet to drive the deformable sheet to move relative to the connecting sheet.

[0034] Optionally, the first detection member further includes a limiting member, which is disposed on the mounting seat and is used to limit the second strain gauge on the mounting seat.

[0035] Optionally, the position-limiting member comprises a connecting arm and two clamping arms correspondingly connected to two ends of the connecting arm, and the two clamping arms are correspondingly clamped on two sides of the mounting seat;

[0036] The inner wall surface of the clamping arm comprises a pressing surface, the pressing surface faces the connecting piece, and the connecting piece is pressed between the pressing surface and the mounting seat.

[0037] Optionally, the third fixing portion includes a connector body and a contact block, the connector body is connected to the floating plate; the contact block is connected to the connector body, and the contact block is arranged opposite to the deformation sheet and abuts against the deformation sheet;

[0038] The limiting member comprises an avoidance hole, and the avoidance hole is arranged opposite to the deformation sheet;

[0039] The contact block is located in the avoidance hole.

[0040] Optionally, a third elastic member is disposed between the fixed plate and the floating plate, a first end of the third elastic member is disposed in abutment with the fixed plate, and a second end of the third elastic member is disposed in abutment with the floating plate.

[0041] Optionally, a plurality of first guide posts are provided on one of the fixed plate and the floating plate, and the plurality of first guide posts are arranged at intervals along the circumference of the floating plate or the fixed plate;

[0042] The third elastic member includes a plurality of springs, and the springs are sleeved on the outside of the corresponding first guide pillars.

[0043] Optionally, a plurality of second guide posts are provided on one of the fixed plate and the floating plate, and the plurality of second guide posts are arranged at intervals along the circumference of the fixed plate and the floating plate; a plurality of through holes are provided on the other of the fixed plate and the floating plate, and the plurality of through holes are arranged at intervals along the circumference of the other of the fixed plate and the floating plate;

[0044] The second guide column and the through hole both extend along the floating direction of the floating plate;

[0045] The plurality of second guide posts are correspondingly inserted into the plurality of through holes.

[0046] Optionally, the fixed plate comprises a mounting surface facing away from the floating plate, and the mounting surface is arranged toward the base;

[0047] The through hole is arranged on the fixed plate and passes through the mounting surface; the second guide column is arranged on the floating plate;

[0048] The first end of the first detection member is connected to the second guide column passing through the through hole, and the second end of the first detection member is connected to the mounting surface.

[0049] Optionally, the base and the upper base plate are integrally formed or separately connected.

[0050] Optionally, the first detection member includes a Hall sensor and a magnetic member, one of the Hall sensor and the magnetic member is disposed on the floating plate, and the other of the Hall sensor and the magnetic member is disposed on the fixed plate; or,

[0051] The first detection member includes a photoelectric sensor and a light blocking member, one of the photoelectric sensor and the light blocking member is disposed on the floating plate, and the other of the photoelectric sensor and the light blocking member is disposed on the fixed plate; or,

[0052] The first detection member includes a displacement sensor, and the displacement sensor is disposed on one of the floating plate and the fixed plate.

[0053] Optionally, the 3D printer is a light-curing 3D printer;

[0054] The machine body comprises a base, an upper bottom plate and a printing assembly, wherein the upper bottom plate is arranged on the base, the upper bottom plate comprises the fixed plate and the floating plate, and an exposure screen is installed on the floating plate; the printing assembly is arranged on the upper bottom plate;

[0055] The printing assembly includes a lifting assembly, a cantilever and a first printing platform, and the first printing platform is connected to the lifting assembly through the cantilever.

[0056] Optionally, a second detection member is provided on the cantilever, and the cantilever can generate a second deformation amount when the first printing platform contacts the exposure screen, and the second detection member can sense the second deformation amount and generate a second electrical signal corresponding to the second deformation amount;

[0057] The 3D printer also includes a processor, which receives the first electrical signal and the second electrical signal, and outputs a third electrical signal or a fourth electrical signal according to the first electrical signal and the second electrical signal; wherein the third electrical signal is used to indicate whether the current leveling is successful; and the fourth electrical signal is used to indicate that the current position of the first printing platform is a zero position.

[0058] Optionally, the 3D printer is a fused deposition modeling 3D printer;

[0059] The three-dimensional printer comprises a printing assembly, wherein the printing assembly comprises a bracket, a print head driving mechanism, a print head and a second printing platform, wherein the bracket and the print head driving mechanism are both arranged on the machine body;

[0060] The second printing platform is arranged on the floating plate, and the fixed plate is arranged on the bracket; or the print head is arranged on the floating plate, and the fixed plate is arranged on the print head driving mechanism.

[0061] By means of the above technical solution, the utility model has at least the following beneficial effects:

[0062] The three-dimensional printer provided by the embodiment of the utility model includes a fixed plate and a floating plate which can be floatably arranged on the fixed plate. The first detection member is connected to the floating plate and can be used to detect the displacement of the floating plate relative to the fixed plate, or the force magnitude of the floating plate, so that the leveling accuracy of the floating plate and the related structures of the floating plate can be determined through the detected displacement or force magnitude. BRIEF DESCRIPTION OF THE DRAWINGS

[0063] Figure 1 An exploded schematic diagram of an upper base plate of a base provided in an embodiment of the utility model;

[0064] Figure 2 A schematic diagram of the structure of a detection member of a base provided in an embodiment of the utility model;

[0065] Figure 3 A schematic structural diagram of an upper base plate of a base provided in an embodiment of the utility model;

[0066] Figure 4 An exploded schematic diagram of an upper base plate of another base provided in an embodiment of the utility model;

[0067] Figure 5 A schematic structural diagram of an upper base plate of another base provided in an embodiment of the utility model;

[0068] Figure 6 A schematic diagram of the structure of a fixing plate of an upper bottom plate in a base provided in an embodiment of the utility model;

[0069] Figure 7 An exploded schematic diagram of a floating plate and an exposure screen of an upper bottom plate in a base provided by an embodiment of the utility model;

[0070] Figure 8 An exploded schematic diagram of another detection member of a base provided in an embodiment of the utility model;

[0071] Fig. 9 A schematic structural diagram of another limiting member of a detection member in a base provided in an embodiment of the utility model;

[0072] Fig.10 A schematic diagram of the structure of another detection member of a base provided in an embodiment of the utility model;

[0073] Fig.11 A cross-sectional schematic diagram of a three-dimensional printer provided in an embodiment of the utility model;

[0074] Fig.12 A schematic diagram of the structure of a three-dimensional printer provided by an embodiment of the utility model;

[0075] Fig.13 A partially enlarged schematic diagram of a three-dimensional printer provided in an embodiment of the utility model.

[0076] Description of reference numerals:

[0077] 1-upper bottom plate; 11-fixed plate; 111-through hole; 112-first guide column; 12-floating plate; 121-second guide column; 13-third elastic member; 2-exposure screen; 3-detection member; 31-first connecting member; 311-first fixing part; 312-second fixing part; 313-deformation part; 32-first strain gauge; 33-mounting seat; 331-accommodating groove; 34-second strain gauge; 341-connecting piece; 342-deformation Variable plate; 35-second connecting member; 351-third fixing part; 3511-connecting member body; 352-fourth fixing part; 36-limiting member; 361-connecting arm; 3611-avoidance hole; 362-clamping arm; 3621-pressing surface; 37-contact block; 38-first end of the first detection member; 39-second end of the first detection member; 4-lifting assembly; 5-cantilever; 51-deformation hole; 6-first printing platform; 7-processor. DETAILED DESCRIPTION

[0078] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution in the embodiment of the present invention will be described in more detail below in conjunction with the drawings in the embodiment of the present invention.

[0079] like Figures 1 to 5 As shown, an embodiment of the utility model provides a three-dimensional printer, including a fixed plate 11, which is fixedly arranged on the body of the three-dimensional printer; a floating plate 12, which can be floated on the fixed plate 11; a first detection member 3, which is connected to the floating plate 12 and is used to detect the displacement of the floating plate 12 relative to the fixed plate 11, or the force applied to the floating plate 12.

[0080] The three-dimensional printer provided by the embodiment of the utility model includes a fixed plate 11 and a floating plate 12 which is floatably arranged on the fixed plate 11. The first detection member 3 is connected to the floating plate 12 and can be used to detect the displacement of the floating plate 12 relative to the fixed plate 11, or the force applied to the floating plate 12. The leveling accuracy of the floating plate 12 and its related structures can be determined through the detected displacement or force.

[0081] For example, if the exposure screen 2 of the photocuring printer is installed on the floating plate 12 so that the exposure screen 2 can float synchronously with the floating plate 12, then in the process of the printing platform driving the floating plate to make the floating plate float, the first detection component 3 can detect the displacement or force of the floating plate 12 relative to the fixed plate 11, that is, it is used to detect the displacement or force of the exposure screen 2 relative to the fixed plate 11, so as to facilitate determining whether the printing platform of the 3D printer is currently in a suitable leveling position through the displacement of the exposure screen 2 relative to the fixed plate 11 or the force of the floating plate 12, which can facilitate avoiding printing failure caused by improper current leveling position of the printing platform of the 3D printer (for example, the printing platform is over-pressed, the printing platform is not pressed down enough, etc.) or improper current position posture of the printing platform (for example, the four corners of the printing platform are in improper position postures such as one corner is tilted and the triangle is sunken, one corner is sunken and the triangle is tilted, two corners are tilted and two corners are sunken, etc.).

[0082] Alternatively, if the printing platform of the FDM printer is set on a floating plate, and a fixed plate is set on the main frame of the FDM printer, the detected displacement or force can be used to determine the leveling of the floating plate and the printing platform set on the floating plate, thereby avoiding a series of printing problems caused by the printing platform of the FDM printer not being leveled relative to the moving plane of the print head. Alternatively, if the print head (such as a print nozzle) of the FDM printer is set on a floating plate, and a fixed plate is set on the bracket of the FDM printer, the detected displacement or force can be used to determine the leveling accuracy of the floating plate and the moving platform where the print head is set on the floating plate relative to the printing platform, thereby avoiding a series of printing problems caused by the print head of the FDM printer not being leveled.

[0083] In some embodiments, the 3D printer is a photocuring printer, and the body of the 3D printer may include a base; a vertical moving mechanism, which is arranged on the base; a printing platform, which is connected to the vertical moving mechanism, and the vertical moving mechanism drives the printing platform to move relative to the base, and the printing platform includes a fixed plate 11 and a floating plate 12, and the fixed plate 11 is fixedly connected to the vertical moving mechanism.

[0084] A material trough is provided on the base, and one side of the floating plate 12 can be a printing plane, which is arranged opposite to the material trough, and is used to connect the printing model.

[0085] In the above embodiment, the printing plane of the printing platform can be floating. When the printer is leveled, the vertical moving mechanism can drive the printing platform to descend and contact the exposure screen 2, so that the floating plate 12 floats relative to the fixed plate 11. At this time, if the displacements of the floating plate 12 detected by the first detection member 3 relative to the fixed plate 11 at various locations are equal or close, or the magnitudes of the forces at various locations of the floating plate are equal or close, it means that the printing platform and the exposure screen 2 are completely fitted. If the displacements of the floating plate 12 detected by the first detection member 3 relative to the fixed plate 11 at various locations are not equal and have a large difference, or the magnitudes of the forces at various locations of the floating plate are not equal or have a large difference, it means that the printing platform and the exposure screen 2 are not completely fitted, and re-leveling is required. Until the displacements of the floating plate 12 detected by the first detection member 3 relative to the fixed plate 11 at various locations are equal or close, or the magnitudes of the forces at various locations of the floating plate are equal or close, the printing platform can be locked for printing, thereby realizing closed-loop control of automatic leveling of the printer, thereby ensuring that the printing platform and the exposure screen 2 are parallel to each other during printing, improving the leveling accuracy, and also improving the printing quality of the model.

[0086] In the above embodiment, the vertical moving mechanism may be a mechanism capable of driving the printing platform to move in the vertical direction relative to the base, for example, a lead screw transmission mechanism, a telescopic mechanism, and the like.

[0087] In some other embodiments, the body of the 3D printer may include a base; an upper base plate 1, which is arranged on the base, and the upper base plate 1 includes a fixed plate 11 and a floating plate 12, and an exposure screen 2 is installed on the floating plate 12; and a printing component, which is arranged on the upper base plate 1.

[0088] It can be understood that the exposure screen 2 is mounted on the floating plate 12 so that the exposure screen 2 and the floating plate 12 can float synchronously relative to the fixed plate 11 . Therefore, the displacement detected by the first detection member 3 is also the displacement of the exposure screen 2 relative to the fixed plate 11 .

[0089] Moreover, the floating direction of the exposure screen 2 and the floating plate 12 is consistent with the moving direction of the printing platform of the 3D printer. When the printing platform is lowered to contact the exposure screen 2, the floating plate 12 can move a certain displacement relative to the fixed plate 11 under the downward pressure of the printing platform. The greater the displacement, the greater the force on the floating plate 12, and the smaller the displacement, the smaller the force on the floating plate 12.

[0090] Among them, see Figure 1 and Figure 4 The fixed plate 11 and the floating plate 12 can both be frame structures, the floating plate 12 can be floatingly embedded in the fixed plate 11, and the exposure screen 2 can be embedded in the floating plate 12, so that the curing light emitted by the light source in the base can be projected onto the exposure screen 2 through the fixed plate 11 and the floating plate 12.

[0091] When the printer is leveled, the printing platform is lowered by the cantilever and contacts the exposure screen 2, so that the exposure screen 2 and the floating plate 12 float synchronously relative to the fixed plate 11. At this time, if the displacements of the floating plate 12 detected by the first detection member 3 relative to the fixed plate 11 at various locations are equal or close, or the forces at various locations of the floating plate 12 are equal or close, it means that the printing platform and the exposure screen 2 are completely fitted together. If the displacements of the floating plate 12 detected by the first detection member 3 relative to the fixed plate 11 at various locations are not equal and the difference is large, it means that the printing platform and the exposure screen 2 are not completely fitted together and need to be re-leveled. Until the displacements of the floating plate 12 detected by the first detection member 3 relative to the fixed plate 11 at various locations are equal or close, or the forces at various locations of the floating plate 12 are equal or close, the printing platform can be locked for printing, thereby realizing closed-loop control of automatic leveling of the printer, thereby ensuring that the printing platform and the exposure screen 2 are parallel to each other during printing, improving the leveling accuracy, and also improving the printing quality of the model.

[0092] In some embodiments, see Figure 3 and Figure 5 The number of the first detection members 3 can be multiple, and the multiple first detection members 3 are arranged at multiple corresponding detection positions on the floating plate 12, and the multiple detection positions are arranged at intervals along the circumference of the floating plate 12. The detection members 3 are used to detect the displacement of the floating plate 12 relative to the fixed plate 11 at the detection position, or the force applied to the floating plate 12 at the detection position.

[0093] Among them, a plurality of detection positions can be evenly arranged along the circumference of the center line of the exposure screen 2 or the printing platform. For example, the number of detection positions and the number of first detection members 3 can be four, respectively, and the four detection positions can be correspondingly located at the four corners of the floating plate 12, then, the four first detection members 3 can be arranged at the four corners of the floating plate 12. Since the exposure screen 2 or the printing plane is usually a regular rectangular structure, the four first detection members 3 are arranged at the four corners of the floating plate 12 to jointly detect the displacement of the four corners of the exposure screen 2 or the printing plane relative to the fixed plate 11, so as to judge whether the pressure of the printer platform received by each position on the exposure screen 2 is the same or close. If they are the same or close, it means that the exposure screen 2 is completely compliant with the printing platform and the leveling is successful. At this time, the printing platform can be locked for printing. If there is at least one data detected by the four first detection members 3 that is not equal or close to the other data, it can be judged that the pressure of the printer platform received by the corresponding position on the exposure screen 2 is the same as that of other positions, so that it can be judged that the printing platform is biased and not completely compliant with the printing platform, and it needs to be leveled again, which is more convenient and accurate to use.

[0094] Of course, in some other embodiments, the number of the first detection member 3 may also be one, and the first detection member 3 may be an annular structure, centered at the center of the exposure screen 2 or the printing platform, and arranged around the center line of the exposure screen 2 or the printing platform, and it may also detect the displacement of the floating plate 12 relative to various locations of the fixed plate 11 or the magnitude of the force applied to the floating plate 12. Specifically, the first detection member 3 may be a sensor of a spring-type strain gauge structure.

[0095] The first detection member 3 may have various structural forms, as long as it can detect the displacement of the floating plate 12 relative to the fixed plate 11 or the force applied to the floating plate 12 .

[0096] In some embodiments, the first detection member 3 may include a Hall sensor and a magnetic member, one of which may be disposed on the floating plate 12, and the other of which may be disposed on the fixed plate 11. When the floating plate 12 moves relative to the fixed plate 11, if the magnetic member enters the magnetic sensing range of the Hall sensor, the Hall sensor may be triggered to generate an electrical signal. On the contrary, if the magnetic member does not enter the magnetic sensing range of the Hall sensor, the Hall sensor will not be triggered, thereby detecting the displacement of the floating plate 12 relative to the fixed plate 11.

[0097] Alternatively, the first detection member 3 may include a photoelectric sensor and a light blocking member, one of which may be disposed on the floating plate 12, and the other of which may be disposed on the fixed plate 11. When the floating plate 12 moves relative to the fixed plate 11, if the light blocking member can block the light of the light emitter of the photoelectric sensor, the photoelectric sensor may be triggered to generate an electrical signal, and conversely, if the light blocking member does not enter and block the light emitter of the photoelectric sensor, the photoelectric sensor will not be triggered, thereby detecting the displacement of the floating plate 12 relative to the fixed plate 11.

[0098] Alternatively, the first detection member 3 may include a displacement sensor disposed on one of the floating plate 12 and the fixed plate 11. When the floating plate 12 moves relative to the fixed plate 11, the displacement of the floating plate 12 relative to the fixed plate 11 may be detected.

[0099] For ease of use and to improve the accuracy of the detection results, in some other embodiments, one end of the first detection member 3 is connected to the floating plate 12, and the other end of the first detection member 3 can be connected to the fixed plate 11. The first detection member 3 includes a deformation portion 313 and a sensing portion. The deformation portion 313 can generate a first deformation amount as the floating plate 12 moves relative to the fixed plate 11, and the sensing portion can sense the first deformation amount and generate a first electrical signal corresponding to the first deformation amount.

[0100] Since the displacement of the exposure screen 2 relative to the fixed plate 11 is usually very small, a strain-type first detection member 3 is used to detect the displacement of the exposure screen 2. When the exposure screen 2 produces a small displacement, the first detection member 3 can be slightly deformed to generate an electrical signal corresponding to the displacement, thereby accurately measuring the displacement, being more convenient to use and improving the accuracy of the detection result.

[0101] In some embodiments, see Figure 1 , Figure 2 and Figure 3 The first detecting member 3 may include a first connecting member 31, which may include a first fixing portion 311, a second fixing portion 312 and a deformation portion 313; one end of the deformation portion 313 is connected to the floating plate 12 through the first fixing portion 311, and the other end of the deformation portion 313 is connected to the fixed plate 11 through the second fixing portion 312; the sensing portion includes a first strain gauge 32, at least part of the first strain gauge 32 is in close contact with the deformation portion 313, or each part of the first strain gauge 32 is in close contact with the deformation portion.

[0102] Among them, the first connecting member 31 can be an elastic sheet, such as a leaf spring, one end of which can be a first fixed portion 311, and the other end can be a second fixed portion 312, the deformation portion 313 can be connected between the first fixed portion 311 and the second fixed portion 312, and in order to facilitate the deformation of the deformation portion 313, the width of the deformation portion 313 can be smaller than the width of the first fixed portion 311 and the second fixed portion 312.

[0103] When the printer is leveled, the printing platform is lowered by the cantilever and contacts the exposure screen 2, so that the exposure screen 2 and the floating plate 12 move synchronously relative to the fixed plate 11. Since one end of the first connecting member 31 is connected to the floating plate 12 and the other end is connected to the fixed plate 11, the deformation portion 313 of the first connecting member will be slightly deformed as the floating plate 12 moves, so that the first strain gauge 32 closely attached to the deformation portion 313 will also be deformed and generate a corresponding first electrical signal. Specifically, according to the strain effect of the strain gauge, when the sensing portion 32 is deformed, the resistance value of the first strain gauge 32 may change, thereby changing the voltage value output by the first strain gauge 32.

[0104] The first strain gauge 32 may be at least partially close to the deformation portion 313, or each part of the first strain gauge 32 may be close to the deformation portion 313, so as to ensure that the first strain gauge 32 has a strain effect, thereby realizing the detection of the displacement of the floating plate 12 relative to the fixed plate 11, or the force applied to the floating plate 12. The first connecting member 31 may be connected to the fixed plate 11 and the floating plate 12 by bolt connection or the like.

[0105] It can be understood that the above-mentioned embodiment has certain requirements on factors such as the material, elasticity and shape of the first connecting member 31 to ensure that the first connecting member 31 can drive the first strain gauge 32 to deform and generate a corresponding electrical signal.

[0106] In some other embodiments, see Figure 4 , Figure 5 as well as Figures 8 to 10 The first detection member 3 may also include a mounting seat 33 and a second connecting member 35; the sensing portion may include a second strain gauge 34, which is arranged on the mounting seat 33. Specifically, a mounting groove may be provided on the mounting seat 33, and the second strain gauge 34 is embedded in the mounting groove; the second connecting member 35 may include a third fixing portion 351, a fourth fixing portion 352 and a deformation portion 313; one end of the deformation portion 313 is connected to the floating plate 12 through the third fixing portion 351, and the fixed plate 11 and the mounting seat 33 are both connected to the deformation portion 313 through the fourth fixing portion 352; the third fixing portion 351 is in contact with the second strain gauge 34.

[0107] When the printer is leveled, the printing platform is lowered by the cantilever and contacts the exposure screen 2, so that the exposure screen 2 and the floating plate 12 move synchronously relative to the fixed plate 11. Since the third fixing portion 351 of the second connecting member 35 is connected to the floating plate 12, and the fourth fixing portion 352 is connected to the fixed plate 11, as the floating plate 12 moves, the deformation portion 313 of the second connecting member 35 will be slightly deformed, thereby driving the third fixing portion 351 of the second connecting member 35 to squeeze the second strain gauge 34, thereby causing the second strain gauge 34 to deform and generate a corresponding first electrical signal. Specifically, according to the strain effect of the strain gauge, when the second strain gauge 34 is deformed, the resistance value of the second strain gauge 34 can change, thereby causing the voltage value output by the second strain gauge 34 to change.

[0108] It should be noted that the second strain gauge 34 is not directly arranged on the second connecting member 35, but is arranged on the mounting seat 33, and the second strain gauge 34 is deformed by contacting with the second connecting member 35, and generates a first electrical signal. Compared with the embodiment in which the strain gauge is directly arranged on the connecting member, the present embodiment does not require high factors such as the material, elasticity and shape of the second connecting member 35, as long as it can contact with the second strain gauge 34 when deformed, so that the second strain gauge 34 is deformed and generates a corresponding first electrical signal. Specifically, the structure of the first detection member 3 can be selected according to actual needs during implementation.

[0109] In some embodiments, see Figure 8The second strain gauge 34 may include a connecting piece 341 and a deformation piece 342 movably connected to the connecting piece 341; a receiving groove 331 is provided on the mounting seat 33, and the receiving groove 331 is opposite to the deformation piece 342, and the receiving groove 331 is used to provide a movement space for the movement of the deformation piece 342; the third fixing portion 351 of the second connecting member 35 abuts against the deformation piece 342 to drive the deformation piece 342 to move relative to the connecting piece 341.

[0110] When the printer is leveled, the printing platform descends by the cantilever and contacts the exposure screen 2, so that the exposure screen 2 and the floating plate 12 move synchronously relative to the fixed plate 11. As the floating plate 12 moves, the deformation portion 313 of the second connecting member 35 will be slightly deformed, and drive the third fixed portion 351 of the second connecting member 35 to squeeze the deformation sheet 342, so that the deformation sheet 342 moves relative to the connecting sheet 341, thereby causing the second strain gauge 34 to deform and generate a first electrical signal.

[0111] Specifically, the second strain gauge 34 may be a plate structure with a U-shaped through hole 111 formed on the plate structure, the connecting piece 341 is formed outside the U-shaped through hole 111, and the deformation piece 342 is formed inside the U-shaped through hole 111.

[0112] In some embodiments, the first detection member 3 may further include a limiting member 36 , which is disposed on the mounting seat 33 and is used to limit the second strain gauge 34 on the mounting seat 33 .

[0113] In the above embodiment, by providing the limiting member 36 , the second strain gauge 34 can be stably mounted on the mounting seat 33 , thereby preventing the second strain gauge 34 from shifting, thereby ensuring the detection accuracy of the first detection member 3 .

[0114] In some embodiments, see Fig. 9 and Fig.10 The limit member 36 may include a connecting arm 361 and two clamping arms 362 correspondingly connected to the two ends of the connecting arm 361, and the two clamping arms 362 are correspondingly clamped on both sides of the mounting seat 33; the inner wall surface of the clamping arm 362 includes a clamping surface 3621, and the clamping surface 3621 faces the connecting piece 341, and the connecting piece 341 is pressed between the clamping surface 3621 and the mounting seat 33.

[0115] The stopper 36 is clamped and installed on the mounting seat 33 by the clamping arm 362, and the inner wall surface of the clamping arm 362 includes a pressing surface 3621 facing the connecting piece 341, so that the connecting piece 341 can be pressed between the pressing surface 3621 and the mounting seat 33. When installing the first detection member 3, the second strain gauge 34 can be placed on the mounting seat 33 first, and then the stopper 36 is pressed down so that the pressing surface 3621 is close to the connecting piece 341. On the one hand, the stopper 36 is installed on the mounting seat 33, and on the other hand, the second strain gauge 34 is stably installed on the mounting seat 33.

[0116] In some embodiments, see Figure 5 , Figure 8 and Fig. 9 The third fixing portion 351 may include a connector body 3511 and a contact block 37, the connector body 3511 is connected to the floating plate 12; the contact block 37 is connected to the connector body 3511, and the contact block 37 is arranged opposite to the deformation piece 342 and abuts against the deformation piece 342; the limiter 36 may include an avoidance hole 3611, which is arranged opposite to the deformation piece 342; the contact block 37 is located in the avoidance hole 3611.

[0117] Since the contact block 37 is located in the avoidance hole 3611 , the contact block 37 can squeeze the deformation sheet 342 through the avoidance hole 3611 , so that the deformation sheet 342 moves relative to the connecting sheet 341 , thereby facilitating the triggering of the second strain gauge 34 .

[0118] In some embodiments, a snap-fit ​​protrusion may be provided on one of the inner surface of the clamping arm 362 and the side wall surface of the mounting seat 33, and a corresponding snap-fit ​​groove may be provided on the other. When the limit member 36 is installed on the mounting seat 33, the snap-fit ​​protrusion may be engaged in the snap-fit ​​groove.

[0119] In some embodiments, see Figure 1 and Figure 4 A third elastic member 13 is arranged between the fixed plate 11 and the floating plate 12, and a first end of the third elastic member 13 is abutted against the fixed plate 11, and a second end of the third elastic member 13 can be abutted against the floating plate 12, so that the floating plate 12 can move relative to the fixed plate 12 through the third elastic member 13, so as to facilitate the resetting of the floating plate 12 after the movement.

[0120] In some embodiments, a plurality of first guide columns 112 may be provided on one of the fixed plate 11 and the floating plate 12, and the plurality of first guide columns 112 may be arranged at intervals along the circumference of the floating plate 12 or the fixed plate 11; the third elastic member 13 may include a plurality of springs, and the springs are sleeved on the outside of the corresponding first guide columns 112.

[0121] The first guide column 112 can guide the expansion and contraction of the spring, so that the spring can apply force to the floating plate 12 to reset the floating plate 12, and also can help the floating plate 12 overcome the elastic force of the spring and move relative to the fixed plate 11. It can be understood that the length of the first guide column 112 is relatively small, and the first guide column 112 will not interfere with the movement of the floating plate 12 relative to the fixed plate 11.

[0122] In some embodiments, see Figure 6 and Figure 7 A plurality of second guide posts 121 may be provided on one of the fixed plate 11 and the floating plate 12, and the plurality of second guide posts 121 are arranged at intervals along the circumference of one of the fixed plate 11 and the floating plate 12; a plurality of through holes 111 are provided on the other of the fixed plate 11 and the floating plate 12, and the plurality of through holes 111 are arranged at intervals along the circumference of the other of the fixed plate 11 and the floating plate 12; both the second guide posts 121 and the through holes 111 extend along the floating direction of the floating plate 12; and the plurality of second guide posts 121 are correspondingly inserted into the plurality of through holes 111.

[0123] Among them, the second guide column 121 is inserted into the through hole 111, and the second guide column 121 and the through hole 111 both extend along the floating direction of the floating plate 12. Therefore, in the process of the floating plate 12 and the exposure screen 2 floating relative to the fixed plate 11, the second guide column 121 moves in the through hole 111, thereby guiding the floating of the floating plate 12 and avoiding the exposure screen 2 from being offset, thereby ensuring the printing quality of the model.

[0124] In some embodiments, the fixed plate 11 may be provided with a mounting groove matching the shape of the floating plate 12, and the floating plate 12 may be disposed in the mounting groove. Moreover, for ease of use, the aforementioned through hole 111 may be opened at the bottom of the mounting groove, and the aforementioned second guide column 121 may be disposed on the floating plate 12.

[0125] In some embodiments, the fixed plate 11 may include a mounting surface facing away from the floating plate 12, and the mounting surface is arranged toward the base; a through hole 111 is arranged on the fixed plate 11 and passes through the mounting surface; a second guide column 121 is arranged on the floating plate 12; the first end of the first detection member 3 is connected to the second guide column 121 passing through the through hole 111, and the second end of the first detection member 3 is connected to the mounting surface, so that the first detection member 3 can be located on the side of the upper base plate 1 facing away from the exposure screen 2, so that the first detection member 3 can be located inside the base without being exposed outside the base, so as to protect the first detection member 3 and at the same time does not affect the appearance of the base.

[0126] In some embodiments, the base and the upper base plate 1 can be integrally formed or connected separately.

[0127] In some embodiments, see Fig.12 The 3D printer may be a light-curing 3D printer; the printing assembly may include a lifting assembly 4, a cantilever 5 and a first printing platform 6, and the first printing platform 6 is connected to the lifting assembly 4 through the cantilever 5. The lifting assembly 4 may be a screw transmission mechanism, and the lifting assembly 4 drives the first printing platform 6 to move up and down through the cantilever 5 to print the model.

[0128] In some embodiments, see Fig.12 and Fig.13 A second detection component may be provided on the cantilever 5, and the cantilever 5 can generate a second deformation when the first printing platform 6 contacts the exposure screen 2, and the second detection component can sense the second deformation and generate a second electrical signal corresponding to the second deformation; the 3D printer may also include a processor 7, which receives the first electrical signal and the second electrical signal, and outputs a third electrical signal or a fourth electrical signal according to the first electrical signal and the second electrical signal; wherein the third electrical signal is used to indicate whether the current leveling is successful; and the fourth electrical signal is used to indicate that the current position of the first printing platform 6 is the zero position.

[0129] The second detection member may be a device that can sense the deformation of the cantilever 5 and generate a corresponding electrical signal, such as a strain gauge, a piezoelectric sensor, a capacitive sensor, or a magnetoelectric sensor. For ease of use, in this application, the second detection member may be a strain gauge and attached to the cantilever 5.

[0130] When the first printing platform 6 contacts the exposure screen 2, the cantilever 5 will be slightly deformed, thereby driving the strain gauge to deform and generate a corresponding second electrical signal. Specifically, according to the strain effect of the strain gauge, when the strain gauge is deformed, the resistance value of the strain gauge may change, thereby causing the voltage value output by the strain gauge to change.

[0131] The processor 7 can receive the first electrical signal generated by the first detection member and the second electrical signal generated by the second detection member, thereby determining whether the displacement or force detected by the first detection member 3 at each detection position on the floating plate 12 is close to each other when the first printing platform 6 contacts the exposure screen 2 based on the first electrical signal and the second electrical signal, and outputs a third electrical signal corresponding to the determination result. Specifically, if the processor determines that the displacement or force detected by the first detection member 3 at each detection position is the same or close, the third electrical signal is an electrical signal indicating that the current leveling has been successful; if the processor determines that the displacement or force detected by the first detection member 3 at each detection position is different and the difference is large, the third electrical signal is an electrical signal indicating that the current leveling has failed.

[0132] Alternatively, the processor 7 can receive the first electrical signal generated by the first detection member and the second electrical signal generated by the second detection member, and thereby determine, based on the first electrical signal and the second electrical signal, whether the displacement or force detected by the first detection member 3 at each detection position on the floating plate 12 is close when the first printing platform 6 contacts the exposure screen 2, and regardless of the judgment result, output a fourth electrical signal that takes the current position of the first printing platform 6 as the zero position, so that the first printing platform 6 starts printing at the zero position.

[0133] In order to facilitate the cantilever 5 to generate a second deformation when the first printing platform 6 contacts the exposure screen 2, in some embodiments, a deformation hole 51 extending along the length direction of the cantilever 5 can be opened, so that the cantilever 5 can be more easily deformed under the action of external force.

[0134] In some embodiments, the 3D printer may be a fused deposition modeling 3D printer; the 3D printer includes a printing assembly, the printing assembly may include a bracket, a print head driving mechanism, the print head and a second printing platform, the bracket and the print head driving mechanism are both arranged on the machine body. The second printing platform may be arranged on a floating plate, and a fixed plate may be arranged on the bracket; or the print head may be arranged on a floating plate, and a fixed plate may be arranged on the print head driving mechanism.

[0135] Embodiment 1: A three-dimensional printer, comprising:

[0136] A fixing plate, the fixing plate is fixedly arranged on the body of the 3D printer;

[0137] A floating plate 12 can be floatingly disposed on the fixed plate 11;

[0138] The first detection member, the first detection member 3 is connected to the floating plate 12 and is used to detect the displacement of the floating plate 12 relative to the fixed plate 11, or the force applied to the floating plate.

[0139] Embodiment 2: According to the 3D printer of embodiment 1, the body comprises:

[0140] Base;

[0141] A vertical moving mechanism, the vertical moving mechanism is arranged on the base;

[0142] The printing platform is connected to the vertical moving mechanism, and the vertical moving mechanism drives the printing platform to move relative to the base. The printing platform includes a fixed plate and a floating plate, and the fixed plate is fixedly connected to the vertical moving mechanism.

[0143] Embodiment 3: According to the 3D printer of embodiment 2, a material trough is arranged on the base, one side of the floating plate is a printing plane, the printing plane is arranged opposite to the material trough, and the printing plane is used to connect the printing model.

[0144] Embodiment 4: According to the 3D printer of embodiment 1, the body comprises:

[0145] Base;

[0146] An upper base plate 1 is arranged on the base, and the upper base plate 1 comprises a fixed plate 11 and a floating plate 12, and an exposure screen 2 is mounted on the floating plate 12;

[0147] The printing component is arranged on the upper bottom plate.

[0148] Embodiment 5: A three-dimensional printer according to embodiment 1,

[0149] There are multiple first detection members 3, which are arranged at multiple corresponding detection positions on the floating plate. The multiple detection positions are arranged at intervals along the circumference of the floating plate. The first detection members 3 are used to detect the displacement of the floating plate 12 relative to the fixed plate 11 at the detection position, or the force applied to the floating plate at the detection position.

[0150] Embodiment 6: A three-dimensional printer according to embodiment 1,

[0151] One end of the first detection member 3 is connected to the floating plate 12, and the other end of the first detection member 3 is connected to the fixed plate 11. The first detection member 3 includes a deformation portion 313 and a sensing portion. The deformation portion can generate a first deformation amount as the floating plate 12 moves relative to the fixed plate, and the sensing portion can sense the first deformation amount and generate a first electrical signal corresponding to the first deformation amount.

[0152] Embodiment 7: A three-dimensional printer according to embodiment 6, characterized in that:

[0153] The first detection member 3 includes a first connecting member 31, and the first connecting member includes a first fixing portion 311, a second fixing portion 312 and a deformation portion 313;

[0154] One end of the deformation part is connected to the floating plate through the first fixing part, and the other end of the deformation part is connected to the fixing plate through the second fixing part;

[0155] The sensing portion includes a first strain gauge 32 , and at least a portion of the first strain gauge 32 is in close contact with the deformation portion, or each portion of the first strain gauge 32 is in close contact with the deformation portion.

[0156] Embodiment 8: The three-dimensional printer according to embodiment 6 is characterized in that the first detection member 3 comprises:

[0157] A mounting seat 33 and a second connecting member 35;

[0158] The sensing part includes a second strain gauge 34 , and the second strain gauge 34 is disposed on the mounting seat 33 ;

[0159] The second connecting member 35 includes a third fixing portion 351, a fourth fixing portion 352 and a deformation portion 313;

[0160] One end of the deformation part is connected to the floating plate through the third fixing part 351, and the fixing plate and the mounting seat are both connected to the deformation part through the fourth fixing part 352;

[0161] The third fixing portion 351 contacts the second strain gauge 34 .

[0162] Embodiment 9: A three-dimensional printer according to embodiment 8, characterized in that:

[0163] The second strain gauge 34 includes a connecting piece 341 and a deformation piece 342 movably connected to the connecting piece 341;

[0164] The mounting seat 33 is provided with a receiving groove 331, which is opposite to the deformable sheet 342, and is used to provide a movement space for the deformable sheet 342;

[0165] The first end of the second connecting member 35 abuts against the deformable sheet 342 to drive the deformable sheet 342 to move relative to the connecting sheet 341 .

[0166] Embodiment 10: A three-dimensional printer according to embodiment 9, characterized in that:

[0167] The first detection member 3 further includes a limiting member 36 , which is disposed on the mounting seat 33 and is used to limit the second strain gauge on the mounting seat.

[0168] Embodiment 11: A three-dimensional printer according to embodiment 10, characterized in that:

[0169] The limiting member 36 includes a connecting arm 361 and two clamping arms 362 correspondingly connected to both ends of the connecting arm 361, and the two clamping arms 362 are correspondingly clamped on both sides of the mounting seat 33;

[0170] The inner wall surface of the clamping arm 362 includes a pressing surface 3621 . The pressing surface 3621 faces the connecting piece 341 . The connecting piece 341 is pressed between the pressing surface 3621 and the mounting seat 33 .

[0171] Embodiment 12: A three-dimensional printer according to embodiment 10, characterized in that:

[0172] The third fixing portion 351 includes a connector body 3511 and a contact block 37. The connector body 3511 is connected to the floating plate 12. The contact block 37 is connected to the connector body 3511, and the contact block 37 is disposed opposite to the deformation piece 342 and abuts against the deformation piece 342.

[0173] The limiting member 36 includes an avoidance hole 3611, and the avoidance hole 3611 is arranged opposite to the deformation piece 342;

[0174] The contact block 37 is located in the avoidance hole 3611 .

[0175] Embodiment 13: A three-dimensional printer according to embodiment 1, characterized in that:

[0176] A third elastic member 13 is disposed between the fixed plate 11 and the floating plate 12 . A first end of the third elastic member 13 is disposed in contact with the fixed plate 11 , and a second end of the third elastic member 13 is disposed in contact with the floating plate 12 .

[0177] Embodiment 14: A three-dimensional printer according to embodiment 13, characterized in that:

[0178] A plurality of first guide posts 112 are disposed on one of the fixed plate 11 and the floating plate 12, and the plurality of first guide posts 112 are arranged at intervals along the circumference of the floating plate or the fixed plate;

[0179] The third elastic member includes a plurality of springs, and the springs are sleeved on the outside of the corresponding first guide pillars 112 .

[0180] Embodiment 15: A three-dimensional printer according to embodiment 4, characterized in that:

[0181] A plurality of second guide posts 121 are disposed on one of the fixed plate 11 and the floating plate 12, and the plurality of second guide posts 121 are arranged at intervals along the circumference of the fixed plate 11 and the floating plate 12; a plurality of through holes 111 are disposed on the other of the fixed plate 11 and the floating plate 12, and the plurality of through holes 111 are arranged at intervals along the circumference of the other of the fixed plate 11 and the floating plate 12;

[0182] The second guide column 121 and the through hole 111 both extend along the floating direction of the floating plate 12;

[0183] The second guide posts 121 are correspondingly inserted into the through holes 111 .

[0184] Embodiment 16: A three-dimensional printer according to embodiment 15, characterized in that:

[0185] The fixed plate 11 includes a mounting surface facing away from the floating plate 12, and the mounting surface is arranged toward the base;

[0186] The through hole 111 is disposed on the fixed plate 11 and passes through the mounting surface; the second guide column 121 is disposed on the floating plate 12;

[0187] The first end 38 of the first detecting member 3 is connected to the second guide post 121 passing through the through hole 111 , and the second end 39 of the first detecting member 3 is connected to the mounting surface.

[0188] Embodiment 17: A three-dimensional printer according to embodiment 4, characterized in that:

[0189] The base and the upper base plate are integrally formed or separately connected.

[0190] Embodiment 18: The three-dimensional printer according to embodiment 1 is characterized in that:

[0191] The first detection member includes a Hall sensor and a magnetic member, one of the Hall sensor and the magnetic member is disposed on the floating plate, and the other of the Hall sensor and the magnetic member is disposed on the fixed plate; or,

[0192] The first detection member includes a photoelectric sensor and a light blocking member, one of the photoelectric sensor and the light blocking member is disposed on the floating plate, and the other of the photoelectric sensor and the light blocking member is disposed on the fixed plate; or,

[0193] The first detection member includes a displacement sensor, and the displacement sensor is arranged on one of the floating plate and the fixed plate.

[0194] Embodiment 19: A three-dimensional printer according to embodiment 6,

[0195] The 3D printer is a light-curing 3D printer;

[0196] The machine body includes a base, an upper bottom plate 1 and a printing assembly. The upper bottom plate 1 is arranged on the base. The upper bottom plate 1 includes a fixed plate 11 and a floating plate 12. An exposure screen 2 is installed on the floating plate 12. The printing assembly is arranged on the upper bottom plate 1.

[0197] The printing assembly includes a lifting assembly 4 , a cantilever 5 and a first printing platform 6 , and the first printing platform 6 is connected to the lifting assembly 4 via the cantilever 5 .

[0198] Embodiment 20: A three-dimensional printer according to embodiment 19,

[0199] A second detection member is provided on the cantilever 5, and the cantilever 5 can generate a second deformation amount when the first printing platform 6 contacts the exposure screen, and the second detection member can sense the second deformation amount and generate a second electrical signal corresponding to the second deformation amount;

[0200] The 3D printer also includes a processor 7, which receives the first electrical signal and the second electrical signal, and outputs a third electrical signal or a fourth electrical signal according to the first electrical signal and the second electrical signal; wherein the third electrical signal is used to indicate whether the current leveling is successful; and the fourth electrical signal is used to indicate that the current position of the first printing platform 6 is the zero position.

[0201] Embodiment 21: A three-dimensional printer according to embodiment 1,

[0202] The 3D printer is a fused deposition modeling 3D printer;

[0203] The three-dimensional printer includes a printing assembly, which includes a bracket, a print head driving mechanism, a print head and a second printing platform, and the bracket and the print head driving mechanism are both arranged on the machine body;

[0204] The second printing platform is arranged on the floating plate, and the fixed plate is arranged on the bracket; or the print head is arranged on the floating plate, and the fixed plate is arranged on the print head driving mechanism.

[0205] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. A three-dimensional printer, characterized in that: include: A fixing plate, the fixing plate being fixedly arranged on the body of the 3D printer; A floating plate, wherein the floating plate is floatably disposed on the fixed plate; A first detection member is connected to the floating plate and is used to detect the displacement of the floating plate relative to the fixed plate, or the force applied to the floating plate.

2. The three-dimensional printer according to claim 1, characterized in that: The body comprises: Base; A vertical moving mechanism, wherein the vertical moving mechanism is arranged on the base; The printing platform is connected to the vertical moving mechanism, and the vertical moving mechanism drives the printing platform to move relative to the base. The printing platform includes the fixed plate and the floating plate, and the fixed plate is fixedly connected to the vertical moving mechanism.

3. The three-dimensional printer according to claim 2, characterized in that: A material trough is arranged on the base, one side of the floating plate is a printing plane, the printing plane is arranged opposite to the material trough, and the printing plane is used to connect the printing model.

4. The three-dimensional printer according to claim 1, characterized in that: The body comprises: Base; An upper bottom plate, the upper bottom plate is arranged on the base, the upper bottom plate comprises the fixed plate and the floating plate, and an exposure screen is mounted on the floating plate; A printing component is arranged on the upper base plate.

5. The three-dimensional printer according to claim 1, characterized in that: There are multiple first detection members, which are arranged at multiple corresponding detection positions on the floating plate. The multiple detection positions are arranged at intervals along the circumference of the floating plate. The first detection members are used to detect the displacement of the floating plate relative to the fixed plate at the detection position, or the force applied to the floating plate at the detection position.

6. The three-dimensional printer according to claim 1, characterized in that: One end of the first detection member is connected to the floating plate, and the other end of the first detection member is connected to the fixed plate. The first detection member includes a deformation part and a sensing part. The deformation part can generate a first deformation amount as the floating plate moves relative to the fixed plate, and the sensing part can sense the first deformation amount and generate a first electrical signal corresponding to the first deformation amount.

7. The three-dimensional printer according to claim 6, characterized in that: The first detection member includes a first connecting member, and the first connecting member includes a first fixing portion, a second fixing portion and the deformation portion; One end of the deformable portion is connected to the floating plate through the first fixing portion, and the other end of the deformable portion is connected to the fixing plate through the second fixing portion; The sensing portion includes a first strain gauge, and at least a portion of the first strain gauge is in close contact with the deformation portion, or each portion of the first strain gauge is in close contact with the deformation portion.

8. The three-dimensional printer according to claim 6, characterized in that: The first detection member comprises: a mounting seat and a second connecting member; The sensing portion includes a second strain gauge, and the second strain gauge is arranged on the mounting seat; The second connecting member includes a third fixing portion, a fourth fixing portion and the deformation portion; One end of the deformation part is connected to the floating plate through the third fixing part, and the fixing plate and the mounting seat are both connected to the deformation part through the fourth fixing part; The third fixing portion abuts against the second strain gauge.

9. The three-dimensional printer according to claim 8, characterized in that: The second strain gauge includes a connecting piece and a deformation piece movably connected to the connecting piece; The mounting seat is provided with a receiving groove, the receiving groove is opposite to the deformable sheet, and the receiving groove is used to provide a movement space for the movement of the deformable sheet; The first end of the second connecting member abuts against the deformable sheet to drive the deformable sheet to move relative to the connecting sheet.

10. The three-dimensional printer according to claim 9, characterized in that: The first detection member further includes a limiting member, which is disposed on the mounting seat and is used to limit the second strain gauge on the mounting seat.

11. The three-dimensional printer according to claim 10, characterized in that: The limiting member includes a connecting arm and two clamping arms correspondingly connected to two ends of the connecting arm, and the two clamping arms are correspondingly clamped on two sides of the mounting seat; The inner wall surface of the clamping arm comprises a pressing surface, the pressing surface faces the connecting piece, and the connecting piece is pressed between the pressing surface and the mounting seat.

12. The three-dimensional printer according to claim 10, characterized in that: The third fixing part includes a connector body and a contact block, wherein the connector body is connected to the floating plate; the contact block is connected to the connector body, and the contact block is arranged opposite to the deformation sheet and abuts against the deformation sheet; The limiting member comprises an avoidance hole, and the avoidance hole is arranged opposite to the deformation sheet; The contact block is located in the avoidance hole.

13. The three-dimensional printer according to claim 1, characterized in that: A third elastic member is disposed between the fixed plate and the floating plate, a first end of the third elastic member is disposed in contact with the fixed plate, and a second end of the third elastic member is disposed in contact with the floating plate.

14. The three-dimensional printer according to claim 13, characterized in that: A plurality of first guide posts are disposed on one of the fixed plate and the floating plate, and the plurality of first guide posts are arranged at intervals along the circumference of the floating plate or the fixed plate; The third elastic member includes a plurality of springs, and the springs are sleeved on the outside of the corresponding first guide pillars.

15. The three-dimensional printer according to claim 4, characterized in that: A plurality of second guide posts are disposed on one of the fixed plate and the floating plate, and the plurality of second guide posts are arranged at intervals along the circumference of the fixed plate and the floating plate; a plurality of through holes are disposed on the other of the fixed plate and the floating plate, and the plurality of through holes are arranged at intervals along the circumference of the other of the fixed plate and the floating plate; The second guide column and the through hole both extend along the floating direction of the floating plate; A plurality of the second guide posts are correspondingly inserted into the plurality of the through holes.

16. The three-dimensional printer according to claim 15, characterized in that: The fixed plate comprises a mounting surface facing away from the floating plate, and the mounting surface is arranged toward the base; The through hole is arranged on the fixed plate and passes through the mounting surface; the second guide column is arranged on the floating plate; The first end of the first detecting member is connected to the second guide column passing through the through hole, and the second end of the first detecting member is connected to the mounting surface.

17. The three-dimensional printer according to claim 4, characterized in that: The base and the upper base plate are integrally formed or separately connected.

18. The three-dimensional printer according to claim 1, characterized in that: The first detection member includes a Hall sensor and a magnetic member, one of the Hall sensor and the magnetic member is disposed on the floating plate, and the other of the Hall sensor and the magnetic member is disposed on the fixed plate; or, The first detection member includes a photoelectric sensor and a light blocking member, one of the photoelectric sensor and the light blocking member is disposed on the floating plate, and the other of the photoelectric sensor and the light blocking member is disposed on the fixed plate; or, The first detection member includes a displacement sensor, and the displacement sensor is disposed on one of the floating plate and the fixed plate.

19. The three-dimensional printer according to claim 6, characterized in that: The three-dimensional printer is a light-curing three-dimensional printer; The machine body comprises a base, an upper bottom plate and a printing assembly, wherein the upper bottom plate is arranged on the base, the upper bottom plate comprises the fixed plate and the floating plate, and an exposure screen is installed on the floating plate; the printing assembly is arranged on the upper bottom plate; The printing assembly includes a lifting assembly, a cantilever and a first printing platform, and the first printing platform is connected to the lifting assembly through the cantilever.

20. The three-dimensional printer according to claim 19, characterized in that: The cantilever is provided with a second detection member, the cantilever can generate a second deformation amount when the first printing platform contacts the exposure screen, and the second detection member can sense the second deformation amount and generate a second electrical signal corresponding to the second deformation amount; The 3D printer also includes a processor, which receives the first electrical signal and the second electrical signal, and outputs a third electrical signal or a fourth electrical signal according to the first electrical signal and the second electrical signal; wherein the third electrical signal is used to indicate whether the current leveling is successful; and the fourth electrical signal is used to indicate that the current position of the first printing platform is a zero position.

21. The three-dimensional printer according to claim 1, characterized in that: The three-dimensional printer is a fused deposition modeling three-dimensional printer; The three-dimensional printer comprises a printing assembly, wherein the printing assembly comprises a bracket, a print head driving mechanism, a print head and a second printing platform, wherein the bracket and the print head driving mechanism are both arranged on the machine body; The second printing platform is arranged on the floating plate, and the fixed plate is arranged on the bracket; or the print head is arranged on the floating plate, and the fixed plate is arranged on the print head driving mechanism.

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