Quick-release device and 3D printer

Abstract

The present application relates to the technical field of 3D printing, and discloses a quick-release device and a 3D printer.The quick-release device comprises: a forming platform assembly and a quick-release assembly. The forming platform assembly comprises a connecting member and a forming platform connected to the connecting member, wherein the connecting member is provided with an accommodating recess and a boss located in the accommodating recess. The quick-release assembly comprises a cantilever detachably connected to the connecting member, a cam module rotatably connected to the cantilever, and an adjusting module connected to the cam module and used for pressing or loosening the connecting member, wherein a free end of the cantilever is provided with grooves matched with the boss.

Description

Quick release device and 3D printer

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to Chinese Patent Application No. 202420642716.0 filed on March 29, 2024, the contents of which are incorporated herein by reference in their entirety. Technical Field

[0003] The present application relates to the field of 3D printing technology, and in particular to a quick-release device and a 3D printer. Background Art

[0004] Stereolithography 3D printers generally use a light source within a specific wavelength range to irradiate liquid photocurable resin and trigger a photochemical reaction, causing the photocurable resin in the area irradiated by the light source to solidify from liquid into shape. The molding platform rises one layer to the height and then solidifies the next layer. The newly solidified layer firmly bonds to the previous layer. After a cycle of layer-by-layer curing, the object to be formed is obtained.

[0005] Summary of the Invention

[0006] The present application provides a quick-release device and a 3D printer, which can realize rapid installation and disassembly of a forming platform and improve printing accuracy and stability.

[0007] In order to solve the above technical problems, a technical solution adopted by the present application is to provide a quick-release device, comprising:

[0008] A forming platform assembly, the forming platform assembly comprising a connecting member and a forming platform connected to the connecting member, the connecting member being provided with a receiving groove and a boss located in the receiving groove;

[0009] A quick-release assembly includes a cantilever detachably connected to the connecting piece, a cam module rotatably connected to the cantilever, and an adjustment module connected to the cam module and used to tighten or loosen the connecting piece, and the free end of the cantilever is provided with a groove adapted to the boss.

[0010] According to one embodiment of the present application, the cantilever includes a first mounting seat arranged near the free end and provided with a first mounting groove inside, the upper surface of the first mounting seat is provided with a first mounting portion and a first opening connected to the first mounting groove in sequence, the first opening is provided on the side of the first mounting portion away from the free end, the first mounting portion is used to install the adjustment module, and the first mounting groove is used to install the cam module, a part of the cam module is accommodated in the first mounting groove through the first opening, and the other part is exposed outside the first mounting groove.

[0011] According to one embodiment of the present application, the cam module includes a rotating part, a cam body arranged at one end of the rotating part, a rotating shaft connected to the cam body, and a handle arranged at the other end of the rotating part. The cam body is provided with a through hole, the rotating shaft passes through the through hole and is connected to the cantilever to limit the cam body from rotating around the rotating shaft in the first mounting groove.

[0012] According to one embodiment of the present application, the rotating member includes a first rotating part connected to the handle, a second rotating part connected to the cam body, and a connecting part connecting the first rotating part and the second rotating part, and the first rotating part and the second rotating part are parallel to each other and non-coplanar.

[0013] According to one embodiment of the present application, a second opening is provided on the side of the first mounting seat, and the cantilever also includes a stopper cooperating with the second opening and a mounting block provided in the first mounting groove and connected to the stopper; the rotating shaft passes through the through hole and is connected to the stopper.

[0014] According to one embodiment of the present application, the adjustment module includes a fixed block arranged in the first mounting groove and located above the cam body, a fixing member, a guide member and a buffer member arranged on the fixed block and respectively connected to the fixed block; the first mounting part is provided with a first limiting groove corresponding to the fixing member, the first mounting part is provided with a second limiting groove corresponding to the guide member, and the first mounting part is provided with a third limiting groove corresponding to the buffer member.

[0015] According to one embodiment of the present application, the guide member includes a guide shaft passing through the second limiting groove and connected to the fixed block, and a spring sleeved on the outside of the guide shaft.

[0016] According to one embodiment of the present application, the fixing block includes a recessed portion located in the middle position and protruding portions located at both ends of the recessed portion and respectively connected to the recessed portion. The buffer member is fixed on the protruding portions and is arranged in a one-to-one correspondence with the protruding portions.

[0017] According to one embodiment of the present application, the cantilever further includes a second mounting seat arranged away from the free end, and the second mounting seat is provided with a second mounting groove for accommodating the magnetic part. When the rotating part approaches the magnetic part, it is attracted to the magnetic part.

[0018] In order to solve the above technical problems, another technical solution adopted in this application is: providing a 3D printer, including: the quick-release device, a lifting mechanism and a resin tank, wherein the quick-release device is installed on the lifting mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] FIG1 is a schematic structural diagram of a quick-release device in a locked state according to one or more embodiments of the present application;

[0020] FIG2 is a schematic structural diagram of a quick-release device in a released state according to one or more embodiments of the present application;

[0021] FIG3 is a schematic diagram of the exploded structure of a quick-release assembly according to one or more embodiments of the present application;

[0022] FIG4 is a schematic diagram of the exploded structure of a molding platform assembly according to one or more embodiments of the present application;

[0023] FIG5 is a schematic structural diagram of a cantilever according to one or more embodiments of the present application;

[0024] FIG6 is a schematic diagram of a partial structure of a cam module according to one or more embodiments of the present application;

[0025] FIG7 is a top view of FIG2;

[0026] FIG8 is a cross-sectional view of FIG7 along line AA;

[0027] FIG9 is an enlarged view of area C in FIG8 ;

[0028] FIG10 is a top view of FIG1;

[0029] Figure 11 is a cross-sectional view of Figure 10 along line BB;

[0030] FIG12 is an enlarged view of area D in FIG11 ;

[0031] FIG13 is a schematic diagram of a partial structure of a 3D printer according to one or more embodiments of the present application;

[0032] FIG14 is a schematic diagram of the exploded structure of the clearance eliminating nut according to one or more embodiments of the present application.

[0033] The meanings of the reference numerals in the accompanying drawings are as follows: 100 - quick-release device; 10 - forming platform assembly; 20 - quick-release assembly; 11 - connecting piece; 12 - forming platform; 13 - adapter plate; 111 - receiving groove; 112 - boss; 130 - bar hole; 131 - locking screw; 21 - cantilever; 22 - cam module; 23 - adjustment module; 211 - free end; 212 - fixed end; 213 - first mounting seat; 214 - second mounting seat; 215 - stopper; 216 - mounting block; 2110 - groove; 2130 - first mounting portion; 2130 - first opening; 2132 - first mounting groove; 2133 - second opening; 2134 - first limiting groove; 2135 - second limiting groove; 2136 - third limiting groove; 2 140-second mounting slot; 2141-magnetic part; 2150-screw; 221-rotating part; 222-cam body; 223-rotating shaft; 224-handle; 2211-first rotating part; 2212-second rotating part; 2213-connecting part; 2220-through hole; 2221-large diameter part; 2222-small diameter part; 231-fixing block; 232-fixing part; 233-guide part; 234-buffer part; 2311-recessed part; 2312-protruding part; 2331-guide shaft; 2332-spring; 200-screw assembly; 201-screw; 202-anti-backlash nut; 2021-nut body; 2022-nut spring; 2023-nut flange. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0035] The terms "first", "second" and "third" in this application are only used for descriptive purposes and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first", "second" and "third" may explicitly or implicitly include at least one of such features. In the description of this application, the meaning of "multiple" is at least two, for example, two, three, etc., unless otherwise clearly and specifically defined. All directional indications in the embodiments of this application (such as up, down, left, right, front, back...) are only used to explain the relative positional relationship, movement, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication also changes accordingly. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0036] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0037] In stereolithography 3D printing technology, the locking and fixation of the build platform is particularly important. In conventional machine structures, the build platform and the lifting drive assembly are fixed with hand-tightened screws, which is not convenient for quick installation and removal of the build platform. After long-term use, this fixing method is prone to front-to-back deviation and swing of the model, affecting printing accuracy and stability.

[0038] Figure 1 is a schematic diagram of the quick-release device according to an embodiment of the present invention in a locked state; Figure 2 is a schematic diagram of the quick-release device according to an embodiment of the present invention in a released state; Figure 3 is an exploded schematic diagram of Figure 1; Figure 4 is a schematic diagram of the forming platform assembly according to an embodiment of the present invention; and Figure 5 is a schematic diagram of the quick-release assembly according to an embodiment of the present invention. As shown in Figures 1 to 5, the quick-release device 100 includes a forming platform assembly 10 and a quick-release assembly 20. The forming platform assembly 10 includes a connector 11 and a forming platform 12 connected to the connector 11. The connector 11 is provided with a receiving groove 111 and a boss 112 positioned within the receiving groove 111. The quick-release assembly 20 includes a cantilever 21 detachably connected to the connector 11, a cam module 22 rotatably connected to the cantilever 21, and an adjustment module 23 connected to the cam module 22 and configured to tighten or loosen the connector 11. The free end 211 of the cantilever 21 is provided with a groove 2110 that mates with the boss 112. The shape of the boss 112 can be rectangular or trapezoidal, etc. The specific shape is not limited here. The shape and size of the groove 2110 of the boss 112 can be adapted. In this embodiment, the end of the cantilever 21 connected to the lifting mechanism is the fixed end 212, and the end of the cantilever 21 connected to the forming platform assembly 10 is the free end 211. The size of the receiving groove 111 is adapted to the size of the free end 211 of the cantilever 21. The cantilever 21 can at least be accommodated in the receiving groove 111, thereby achieving the connection between the cantilever 21 and the connecting member 11, and thus achieving the connection between the cantilever 21 and the forming platform 12. In this embodiment, the cam module 22 is rotated to make the adjustment module 23 press or loosen the connecting member, thereby achieving rapid installation and removal of the forming platform 12. After installation, the concave-convex fit between the groove 2110 and the boss 112 reduces the deflection of the forming platform 12 during printing, thereby improving printing accuracy and stability.

[0039] Furthermore, referring to Figures 1 and 4 , the aforementioned forming platform assembly 10 also includes an adapter plate 13 connecting the forming platform 12 and the connector 11. In one embodiment, two adapter plates 13 are provided, symmetrically disposed on either side of the connector 11. The connection between the forming platform 12 and the connector 11 is achieved through the adapter plates 13. In one embodiment, the connector plates 13 are provided with at least one strip-shaped hole 130, through which a locking screw 131 is connected to the connector 11. The strip-shaped hole 130 also allows for adjustment space for leveling the forming platform 12.

[0040] Further, referring to FIG3 , the cantilever 21 includes a first mounting seat 213 disposed near the free end 211 and a second mounting seat 214 disposed near the fixed end 212. A first mounting slot 2132 is disposed within the first mounting seat 213. The upper surface of the first mounting seat 213 is sequentially provided with a first mounting portion 2130 and a first opening 2131 communicating with the first mounting slot 2132. The first opening 2131 is disposed on a side of the first mounting portion 2130 away from the free end 211. The first mounting portion 2130 is used to mount the adjustment module 23, and the first mounting slot 2132 is used to mount the cam module 22. A portion of the cam module 22 is received in the first mounting slot 2132 through the first opening 2130, while the other portion is exposed outside the first mounting slot 2132.

[0041] 2 and 3 , a second opening 2133 is defined on the side of the first mounting base 213. The cantilever 21 further includes a stopper 215 that engages with the second opening 2133, and a mounting block 216 that is disposed within the first mounting slot 2132 and connected to the stopper 215. The stopper 215 is fixedly connected to the mounting block 216 via screws 2150, thereby confining the cam module 22 within the first mounting slot 2132.

[0042] Further, referring to Figures 3, 6, 8 and 11, the cam module 22 includes a rotating member 221, a cam body 222 provided at one end of the rotating member 221, a rotating shaft 223 connecting the cam body 222, and a handle 224 provided at the other end of the rotating member 221. The cam body 222 is provided with a through hole 2220, the rotating shaft 223 is passed through the through hole 2220 and is connected to the stop block 215 to limit the cam body 222 from rotating around the rotating shaft 223 in the first mounting groove 2132.

[0043] Further, referring to Figures 3, 6, 8, and 11, the rotating member 221 includes a first rotating portion 2211 connected to the handle 224, a second rotating portion 2212 connected to the cam body 222, and a connecting portion 2213 connecting the first rotating portion 2211 and the second rotating portion 2212. The first rotating portion 2211 and the second rotating portion 2212 are arranged parallel to each other and not coplanar. As an embodiment, it can be understood that the rotating member 221 is "Z"-shaped, the connecting portion 2213 and the second rotating portion 2212 can be accommodated in the first mounting slot 2132, and the first rotating portion 2211 is exposed outside the first mounting slot 2132. The user can pull up or press down on the handle 224 to rotate the rotating member 221 within a certain range, thereby driving the cam body 222 to rotate along the rotating shaft 223.

[0044] Furthermore, referring to FIG6 , the cam body 222 has a large diameter portion 2221 and a small diameter portion 2222. The distance from the large diameter portion 2221 to the center of the cam body 222 is greater than the distance from the small diameter portion 2222 to the center of the cam body 222. The adjustment module 23 is located above the cam body 222. When the cam body 222 rotates about the rotation axis 223, it can switch between the large diameter portion 2221 and the small diameter portion 2222, thereby changing the distance between the adjustment module 23 and the first mounting portion 2130, thereby enabling the adjustment module 23 to tighten or loosen the connector 11.

[0045] 3 , 9 , and 12 , the adjustment module 23 includes a fixing block 231 disposed within a first mounting slot 2132 and above the cam body 222, a fixing member 232 disposed on the fixing block 231 and connected to the fixing block 231, a guide member 233, and a buffer member 234. The first mounting portion 2130 includes a first limiting slot 2134 corresponding to the fixing member 232, a second limiting slot 2135 corresponding to the guide member 233, and a third limiting slot 2136 corresponding to the buffer member 234. Specifically, the fixing member 232 is disposed within the first limiting slot 2134 and connected to the fixing block 231, securing the fixing block 231 above the cam body 222 so that the fixing block 231 can move vertically under the action of the cam body 222. The fixing member 231 may be a screw or bolt, and the number of fixing members 231 provided is not specifically limited. The fixing members 231 may be disposed in a one-to-one correspondence with the first limiting slots 2134. The guide members 233 are located on both sides of the fixing member 232. The guide members 233 include a guide shaft 2331 that passes through the second limiting slot 2135 and is connected to the fixing block 231, and a spring 2332 that is sleeved around the guide shaft 2331. There is no specific limit on the number of guide members 233 provided, and the guide members 233 can be provided in a one-to-one correspondence with the second limiting slots 2135. The buffer member 234 is elastic, such as a rubber pad, and is movably disposed within the third limiting slot 2136. There is no specific limit on the number of buffer members 234 provided, and the buffer members 234 can be provided in a one-to-one correspondence with the third limiting slots 2136.

[0046] As an embodiment, referring to FIG3 , the fixing block 231 includes a recessed portion 2311 located in the middle and protruding portions 2312 located at both ends of the recessed portion 2311 and connected to the recessed portion 2311 respectively. The buffer members 234 are fixed to the protruding portions 2312 and are arranged one-to-one with the protruding portions 2312. Specifically, the fixing member 232 and the guide member 233 are arranged on the recessed portion 2311, and the buffer member 234 is fixed on the protruding portion 2312. In addition, two fixing members 232, two guide members 233, and two buffer members 234 are provided. The fixing member 232 is arranged along the extension direction of the cantilever 21, the guide member 233 is arranged perpendicular to the extension direction of the cantilever 21 and is symmetrically arranged on both sides of the fixing member 232, and the buffer members 234 are arranged perpendicular to the extension direction of the cantilever 21 and are symmetrically arranged on both sides of the guide member 233.

[0047] Please refer to Figures 7 to 9. When the user pulls up the handle 224 (that is, the first rotating part 2211 moves in the direction away from the second mounting seat 214), the rotating member 221 drives the cam body 222 to rotate along the rotating shaft 223, so that the cam body 222 switches from the large diameter part 2221 to the small diameter part 2222. Under the action of the spring 2332, the fixing block 231 moves downward along the guide shaft 2331 along the surface of the cam body 222. The upper surface of the buffer member 234 is in a clearance fit with the inner surface of the connecting member 11. At this time, the molding platform 12 is in a loose state and the molding platform 12 can be quickly disassembled. Please refer to Figures 10 and 12. When the user presses down the handle 224 (that is, the first rotating part 2211 moves toward the direction close to the second mounting seat 214), the rotating part 221 drives the cam body 222 to rotate along the rotating shaft 223, so that the cam body 222 switches from the small diameter part 2222 to the large diameter part 2221. The cam body 222 pushes the fixing block 231 upward and drives the buffer part 234 to move upward together until the fixing block 231 moves to the top. The upper surface of the buffer part 234 is interference fit with the inner surface of the connecting part 11. At this time, the center point of the cam body 222, the center point of the fixing block 231 and the center point of the connecting part 11 are on the same straight line, and the molding platform 12 is in a locked state, thereby realizing the installation of the molding platform 12.

[0048] Further, referring to Figures 3, 8 and 11, the rotating member 221 is made of iron, and a second mounting groove 2140 for accommodating the magnetic member 2141 is provided on the second mounting seat 214. When the user presses down the handle 224, the first rotating portion 2211 of the rotating member 221 gradually approaches the magnetic member 2141 until the forming platform assembly 10 is in a locked state. The first rotating portion 2211 of the rotating member 221 is close to the upper surface of the second mounting seat 214, and the rotating member 221 is attracted by the magnetic member 2141, which is beneficial to assist in fixing the rotating member 221, thereby fixing the entire forming platform assembly 10 more stably on the cantilever.

[0049] An embodiment of the present application further provides a 3D printer, which includes: the quick-release device 100 described above, a lifting mechanism, and a resin tank, wherein the quick-release device 100 is mounted on the lifting mechanism.

[0050] Furthermore, the lifting mechanism includes a drive motor and a screw assembly 200, as shown in Figure 13 . The screw assembly 200 includes a screw 201 connected to the drive motor and a clearance-eliminating nut 202 mounted on the screw 201 and connected to the cantilever 21. As shown in Figure 14 , the clearance-eliminating nut 202 includes a nut body 2021 that is sleeved around the outside of the screw 201 and fixed to the second mounting seat 214, a nut spring 2022 that is sleeved around the outside of the screw 201 and connected to the nut body 2021, and a nut flange 2023 that is sleeved around the outside of the screw 201 and engages with the nut body 2021.

[0051] The 3D printer rotates the cam module 22 to tighten or loosen the connection piece by the adjustment module 23, thereby achieving rapid installation and removal of the building platform 12. After installation, the concave-convex fit between the groove 2110 and the boss 112 reduces the deflection of the building platform 12 during the printing process, thereby improving printing accuracy and stability.

[0052] The above is only an implementation method of the present application and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the description and drawings of this application, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A quick release device, characterized in that: include: A forming platform assembly, the forming platform assembly comprising a connecting member and a forming platform connected to the connecting member, the connecting member being provided with a receiving groove and a boss located in the receiving groove; A quick-release assembly includes a cantilever detachably connected to the connecting piece, a cam module rotatably connected to the cantilever, and an adjustment module connected to the cam module and used to tighten or loosen the connecting piece, and the free end of the cantilever is provided with a groove adapted to the boss.

2. The quick release device according to claim 1, characterized in that: The cantilever includes a first mounting seat arranged near the free end and provided with a first mounting groove inside, the upper surface of the first mounting seat is sequentially provided with a first mounting portion and a first opening connected to the first mounting groove, the first opening is provided on a side of the first mounting portion away from the free end, the first mounting portion is used to install the adjustment module, and the first mounting groove is used to install the cam module, a part of the cam module is accommodated in the first mounting groove through the first opening, and the other part is exposed outside the first mounting groove.

3. The quick release device according to claim 2, characterized in that: The cam module includes a rotating part, a cam body arranged at one end of the rotating part, a rotating shaft connected to the cam body, and a handle arranged at the other end of the rotating part. The cam body is provided with a through hole, the rotating shaft passes through the through hole and is connected to the cantilever to limit the cam body from rotating around the rotating shaft in the first mounting groove.

4. The quick release device according to claim 3, characterized in that: The rotating member includes a first rotating portion connected to the handle, a second rotating portion connected to the cam body, and a connecting portion connecting the first rotating portion and the second rotating portion. The first rotating portion and the second rotating portion are parallel to each other and are not coplanar.

5. The quick release device according to claim 3 or 4, characterized in that: A second opening is provided on the side of the first mounting seat, and the cantilever further includes a stopper matched with the second opening and a mounting block provided in the first mounting groove and connected to the stopper; the rotating shaft passes through the through hole and is connected to the stopper.

6. The quick release device according to any one of claims 3 to 5, characterized in that: The adjustment module includes a fixed block arranged in the first mounting groove and located above the cam body, a fixing member, a guide member and a buffer member arranged on the fixed block and respectively connected to the fixed block; the first mounting portion is provided with a first limiting groove corresponding to the fixing member, the first mounting portion is provided with a second limiting groove corresponding to the guide member, and the first mounting portion is provided with a third limiting groove corresponding to the buffer member.

7. The quick release device according to claim 6, characterized in that: The guide member includes a guide shaft passing through the second limiting groove and connected to the fixing block, and a spring sleeved on the outside of the guide shaft.

8. The quick release device according to claim 6 or 7, characterized in that: The fixing block includes a recessed portion located in the middle and protruding portions located at both ends of the recessed portion and respectively connected to the recessed portion. The buffering member is fixed on the protruding portions and is arranged in a one-to-one correspondence with the protruding portions.

9. The quick release device according to claim 8, characterized in that: The fixing member and the guiding member are arranged on the recessed portion, the buffer member is fixed on the protruding portion, and two of each of the fixing member, the guiding member and the buffer member are provided. The fixing member is arranged along the extension direction of the cantilever, the guiding member is arranged perpendicular to the extension direction of the cantilever and is symmetrically arranged on both sides of the fixing member, and the buffer member is arranged perpendicular to the extension direction of the cantilever and is symmetrically arranged on both sides of the guide member.

10. The quick release device according to any one of claims 3 to 9, characterized in that: The cantilever further includes a second mounting seat arranged away from the free end. The second mounting seat is provided with a second mounting groove for accommodating the magnetic member. When the rotating member approaches the magnetic member, the rotating member and the magnetic member are attracted to each other.

11. The quick release device according to any one of claims 3 to 10, characterized in that: The cam body has a large diameter portion and a small diameter portion, and a distance from the large diameter portion to the center of the cam body is greater than a distance from the small diameter portion to the center of the cam body.

12. A 3D printer, characterized in that: include: A quick-release device, a lifting mechanism, and a resin tank, wherein the quick-release device is mounted on the lifting mechanism; The quick-release device includes a forming platform assembly and a quick-release assembly, wherein the forming platform assembly includes a connecting piece and a forming platform connected to the connecting piece, wherein the connecting piece is provided with a receiving groove and a boss located in the receiving groove; The quick-release assembly includes a cantilever detachably connected to the connecting piece, a cam module rotatably connected to the cantilever, and an adjustment module connected to the cam module and used to tighten or loosen the connecting piece. The free end of the cantilever is provided with a groove adapted to the boss.

13. The 3D printer according to claim 12, wherein: The cantilever includes a first mounting seat arranged near the free end and provided with a first mounting groove inside, the upper surface of the first mounting seat is sequentially provided with a first mounting portion and a first opening connected to the first mounting groove, the first opening is provided on a side of the first mounting portion away from the free end, the first mounting portion is used to install the adjustment module, and the first mounting groove is used to install the cam module, a part of the cam module is accommodated in the first mounting groove through the first opening, and the other part is exposed outside the first mounting groove.

14. The 3D printer according to claim 13, wherein: The cam module includes a rotating part, a cam body arranged at one end of the rotating part, a rotating shaft connected to the cam body, and a handle arranged at the other end of the rotating part. The cam body is provided with a through hole, the rotating shaft passes through the through hole and is connected to the cantilever to limit the cam body from rotating around the rotating shaft in the first mounting groove.

15. The 3D printer according to claim 14, wherein: The rotating member includes a first rotating portion connected to the handle, a second rotating portion connected to the cam body, and a connecting portion connecting the first rotating portion and the second rotating portion. The first rotating portion and the second rotating portion are parallel to each other and are not coplanar.

16. The 3D printer according to claim 14 or 15, characterized in that: A second opening is provided on the side of the first mounting seat, and the cantilever further includes a stopper matched with the second opening and a mounting block provided in the first mounting groove and connected to the stopper; the rotating shaft passes through the through hole and is connected to the stopper.

17. The 3D printer according to any one of claims 14 to 16, characterized in that: The adjustment module includes a fixed block arranged in the first mounting groove and located above the cam body, a fixing member, a guide member and a buffer member arranged on the fixed block and respectively connected to the fixed block; the first mounting portion is provided with a first limiting groove corresponding to the fixing member, the first mounting portion is provided with a second limiting groove corresponding to the guide member, and the first mounting portion is provided with a third limiting groove corresponding to the buffer member.

18. The 3D printer according to claim 17, wherein: The guide member includes a guide shaft passing through the second limiting groove and connected to the fixing block, and a spring sleeved on the outside of the guide shaft.

19. The 3D printer according to claim 17 or 18, characterized in that: The fixing block includes a recessed portion located in the middle and protruding portions located at both ends of the recessed portion and respectively connected to the recessed portion. The buffering member is fixed on the protruding portions and is arranged in a one-to-one correspondence with the protruding portions.

20. The 3D printer according to any one of claims 14 to 19, characterized in that The cantilever further includes a second mounting seat arranged away from the free end. The second mounting seat is provided with a second mounting groove for accommodating the magnetic member. When the rotating member approaches the magnetic member, the rotating member and the magnetic member are attracted to each other.

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