Heated bed and 3D printer

Abstract

Heated bed, characterized in that the heated bed comprises the following: a printing platform which is provided with a printing plane for carrying a printing element; a support frame arranged on one side of the printing platform facing away from the printing plane, wherein the support frame and the printing platform are spaced apart from each other along the first direction and elastically connected to each other via an elastic element, the first direction being perpendicular to the printing plane; and a locking component arranged on the pressure platform, wherein the locking component has a friction surface that rests against the support frame, wherein the friction surface is arranged parallel to the first direction, wherein a frictional force acts between the friction surface and the support frame parallel to the first direction, wherein the frictional force is used to limit the relative movement of the pressure platform and the support frame in the first direction.

Description

TECHNICAL AREA

[0001] The utility model relates to the technical field of 3D printing, in particular to a heated bed and a 3D printer. STATE OF THE ART

[0002] A 3D printer is a type of rapid prototyping device. When the 3D printer prints, the feeding mechanism feeds the hot melt filament material to the print head. The hot melt filament material is heated in the print head until it is molten and moves along the print path of the 3D printer. Simultaneously, the molten material is extruded onto the build platform to print a three-dimensional object layer by layer.

[0003] However, the vertical displacement between the print platform and the print head can fall outside the preset range. Therefore, the print platform must be leveled before printing to ensure that the print head can move along the print path relative to the platform, thus improving the 3D printer's printing accuracy. Currently, the print platform and support frame are typically fixed vertically to each other using screws or bolts. Leveling requires repeatedly turning these screws or bolts to adjust the height of the print plane, which is quite cumbersome. CONTENT OF THE PRESENT APPLICATION

[0004] The main purpose of the utility model is to provide a heated bed and a 3D printer, with the aim of simplifying the connection structure of the heated bed and improving the leveling efficiency of the heated bed.

[0005] To achieve the above-mentioned purpose, the present utility model provides a heated bed comprising the following: a printing platform which is provided with a printing plane for carrying a printing element; a support frame arranged on one side of the printing platform facing away from the printing plane, wherein the support frame and the printing platform are spaced apart from each other along the first direction and elastically connected to each other via an elastic element, the first direction being perpendicular to the printing plane; and a locking component arranged on the pressure platform, wherein the locking component has a friction surface that rests against the support frame, wherein the friction surface is arranged parallel to the first direction, wherein a frictional force acts between the friction surface and the support frame parallel to the first direction, wherein the frictional force is used to limit the relative movement of the pressure platform and the support frame in the first direction. In one embodiment, the locking component comprises a connecting element and a fastening element, with the connecting element being arranged on the pressure platform; wherein the connecting element has a first surface which rests against the support frame, wherein the first surface is the friction surface, wherein the fastening element is used to adjust the relative position of the first surface and the support frame in the first direction.

[0006] In one embodiment, the connecting element is provided with a connecting hole, the fastening element comprising a connecting section and an application section, the application section being connected to one end of the connecting section, the support frame being provided with a sliding hole, the other end of the connecting section being guided through the sliding hole and connected to the connecting hole, the application section being provided with a second surface, the second surface being in contact with the support frame, the second surface also being a friction surface.

[0007] In one embodiment, the connecting element comprises a first part and a second part which are connected to each other at an angle, wherein the first part is connected to a side of the printing platform facing away from the printing plane, and wherein the second part is arranged parallel to the first direction and is provided with a first surface and a connecting hole.

[0008] In one embodiment, the first part is provided with a limiting groove, the support frame being provided with a limiting projection, one end of the elastic element being limited in the limiting groove and the other end of the elastic element being placed on the limiting projection.

[0009] In one embodiment, the sliding hole extends along the first direction, wherein the diameter of the connecting section corresponds to the width of the sliding hole, the width direction being perpendicular to the first direction; and / or wherein the diameter of the connecting section corresponds to the hole diameter of the connecting hole.

[0010] In one embodiment, it is provided that several locking components are present, wherein several elastic elements are also present and each of the elastic elements is arranged near a locking component, wherein the spring force direction of the elastic element is arranged parallel to the first direction.

[0011] In one embodiment, the projection of the printing platform is arranged in a square shape perpendicular to the first direction and has four corners, with four locking components being provided, each arranged according to one of the corners.

[0012] In one embodiment, the printing platform has a fastening position and at least two mounting positions, wherein the printing platform is rotatably connected to the support frame at the fastening position, and wherein the printing platform is provided with a locking component at each mounting position.

[0013] The present utility model also proposes a 3D printer, the 3D printer comprising a print head mechanism and a heated bed, as described above, wherein the print head mechanism is adapted to push the print platform to level the print plane.

[0014] In the technical solution of the present utility model, the printing platform and the support frame are spaced apart along the first direction. The printing plane serves to support the printing element, and the support frame serves to support the printing platform and is mounted on the side of the printing platform facing away from the printing plane. The printing platform and the support frame are spaced apart from each other along the first direction and elastically connected to each other by an elastic element, so that the support frame and the printing platform can move freely relative to each other in the first direction. Leveling of the printing plane can be achieved by changing the relative distance between the printing platform and the support frame at different positions in the first direction.After leveling is complete, the locking component can limit the relative movement of the print plane and the support frame through the frictional force between the friction surface and the support frame, preventing the print platform and the support frame from moving relative to each other after leveling is finished. During leveling, a point on the print plane is selected as a reference point, the distance between the nozzle and the reference point in the first direction is confirmed, and then at least two more points on the print plane are pressed down sequentially until they are flush with the reference point, so that the distance between the nozzle and the two points in the first direction matches the distance between the nozzle and the reference point in the first direction. This completes the leveling of the print plane. The reference point and the at least two print points are not collinearly aligned.In this embodiment, the printing platform and the support frame are secured by a locking component to simplify the connection structure between the printing platform and the support frame. During leveling, the printing plane can be pressed directly downwards, thus improving leveling efficiency. BRIEF DESCRIPTION OF THE DRAWING

[0015] To clarify the technical solutions of the embodiments of the present utility model or in the prior art, the drawings necessary for the descriptions in embodiments or in the prior art are briefly described below. Obviously, the accompanying drawings in the following description are merely some embodiments of the present utility model, and the person skilled in the art in this field can obtain other drawings without creative effort based on the structures shown in these drawings. Fig. Figure 1 is a schematic structural representation of a heated bed in an embodiment provided by the present utility model; Fig. 2 is an enlarged partial view of location A in Fig. 1; Fig. Figure 3 is a schematic structural exploded view of a heated bed in an embodiment provided by the present utility model; Fig. Figure 4 is a schematic structural representation of a connecting element in an embodiment provided by the present utility model; Fig. Figure 5 is a schematic structural exploded view of a heated bed in another embodiment provided by the present utility model; Fig. Figure 6 is an enlarged partial view of location B in Fig. 5; Fig. Figure 7 is a schematic structural exploded view of a heated bed in another embodiment provided by the present utility model from a different perspective; Fig. Figure 8 is an enlarged partial view of location C in Fig. 7. Description of the reference symbols:

[0016] 100. Heated bed; 1. Print platform; 11. Print plane; 12. Corner; 13. Mounting position; 14. Mounting position; 2. Support frame; 21. Extension section; 211. First contact surface; 212. Second contact surface; 213. Sliding hole; 22. Limiting projection; 3. Elastic element; 4. Locking component; 41. Connecting element; 411. First part; 4111. Limiting groove; 412. Second part; 4121. First surface; 4122. Connecting hole; 42. Fastening element; 421. Connecting section; 422. Contact section; 4221. Second surface; 43. Friction surface.

[0017] The realization of the purpose, functional features and advantages of the utility model are further explained with reference to the attached drawings in combination with the exemplary embodiments. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of this utility model are described clearly and completely below with reference to the drawings in those embodiments. Obviously, the described embodiments are only some of the embodiments of this utility model, not all of them. All other embodiments that a person skilled in the art in this field could derive from the embodiments in this utility model without any creative activity are within the scope of protection of this utility model.

[0019] It should be noted that, where directional terms (such as up, down, left, right, front, back, etc.) are used in the embodiments of this utility model, these directional terms are used exclusively to explain the relative position, movement, and the like between the individual components in a specific position. If the specific position changes, the directional term changes accordingly.

[0020] Furthermore, where descriptions relating to "first," "second," and the like appear in the embodiments of this utility model, these descriptions serve only descriptive purposes and should not be understood as indicating or implying their relative importance or implicitly explaining the set of technical features specified. Thus, features defined as "first" and "second" may explicitly or implicitly include at least one of these features. Moreover, the meaning of "and / or" or "or / and," which appears throughout the text, encompasses three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or a solution that satisfies both A and B simultaneously.Furthermore, the technical solutions of the various embodiments can be combined, but this must be based on the knowledge of a person skilled in the art in this field. If the combination of technical solutions contradicts each other or cannot be implemented, it should be assumed that the combination of technical solutions does not exist and does not fall within the scope of protection required by the utility model.

[0021] Referring to Fig. 1 to Fig. 8 The present utility model provides a heated bed 100 comprising a printing platform 1, a support frame 2 and a locking component 4; the printing platform 1 is provided with a printing plane 11 for supporting the printing element; the support frame 2 is arranged on a side of the printing platform 1 facing away from the printing plane 11; the support frame 2 and the printing platform 1 are spaced apart along the first direction and elastically connected to each other by an elastic element 3, the first direction being perpendicular to the printing plane 11;The locking component 4 is provided on the print platform 1 and has a friction surface 43 that rests against the support frame 2. The friction surface 43 is arranged parallel to the first direction. A frictional force acts between the friction surface 43 and the support frame 2 in the first direction. This frictional force serves to limit the relative movement of the print platform 1 and the support frame 2 in the first direction. The elastic element 3 can be a spring, and the first direction can be the thickness direction of the heated bed, i.e., the Z-axis direction. Fig. 1.

[0022] In the present embodiment, the printing platform 11 serves to support the printing element and provides a base for it. The printing platform 1 can also heat the printing element, thereby preventing it from warping due to thermal expansion and contraction during printing, which would impair print quality. The support frame 2 supports the printing platform 1 and is mounted on the side of the platform facing away from the printing platform 11. It is understood that during leveling, the position of the printing platform 11 is adjusted relative to the nozzle so that the distance between the printing platform 11 and the nozzle remains constant in the first direction, which is perpendicular to the printing platform 11.Therefore, the pressure platform 1 and the support frame 2 are spaced apart along the first direction and elastically connected to each other by the elastic element 3, allowing the support frame 2 and the pressure platform 1 to move freely relative to each other in the first direction. Leveling of the pressure plane 11 can be achieved by changing the relative distance between the pressure platform 1 and the support frame 2 at different positions in the first direction. The locking component 4 is located on the pressure platform 1 and has a friction surface 43 that bears against the support frame 2. After leveling is complete, the locking component 4 can limit the relative movement of the pressure plane 11 and the support frame 2 by the frictional force between the friction surface 43 and the support frame 2, thus preventing the pressure platform 1 and the support frame 2 from moving relative to each other after leveling is complete.In the present embodiment, the printing platform 1 and the support frame 2 are fixed only by the locking component 4 in order to simplify the connection structure between the printing platform 1 and the support frame 2. During leveling, the printing plane 11 can be pressed directly downwards, thus improving leveling efficiency.

[0023] It is understood that the elastic element 3 can support the pressure platform 1. Under the influence of the pressure platform 1's gravity, the elastic element 3 is deformed by the pressure of the pressure platform 1. The maximum static friction force between the friction surface 43 and the support frame 2 is adjustable. Before leveling, the maximum static friction force can be reduced or even set to zero to facilitate the relative movement of the pressure platform 1 and the support frame in the first direction.

[0024] In the actual implementation, the print plane 11 can correspond to the upper surface of the print platform 1, and the support frame 2 is located below the print platform 1. During leveling, the nozzle selects a point on the print plane 11 as a reference point, the distance between the nozzle and the reference point in the first direction is confirmed, and then at least two more points on the print plane 11 are successively pushed downwards by the nozzle until they are flush with the reference point, so that the distance between the nozzle and the two points in the first direction matches the distance between the nozzle and the reference point in the first direction, thus completing the leveling of the print plane 11. The reference point and the at least two print points are not collinearly arranged.After leveling is complete, the maximum static friction force between the friction surface 43 and the support frame 2 can be adjusted. This allows the locking component 4 to lock the print platform 1 and the support frame, ensuring that the print plane 11 remains leveled throughout the printing process and thus guaranteeing print quality. When the nozzle pushes the print platform 1 downwards, the platform must overcome the maximum static friction force and the elastic force of the elastic element 3 to move downwards. Reducing the maximum static friction force between the friction surface 43 and the support frame 2 before leveling reduces the resistance to the downward movement of the print platform 1, thereby preventing excessive force between the nozzle and the print platform 1 that could damage the nozzle or the print platform 1.

[0025] Alternatively, it is provided that, prior to leveling, the maximum static friction force between the friction surface 43 and the support frame 2 can be adjusted so that it is not less than the difference between the elastic force of the elastic element 3 and the gravitational force of the pressure platform 1. In the absence of an external force, the friction force is static friction, and the pressure platform 1 is held in a state of static equilibrium under the influence of gravity, the elastic force of the elastic element 3, and the frictional force of the support element on the friction surface 43. In this way, the pressure platform 1 is in a resting state when the nozzle is not pressing down on the pressure plane 11 to assist with leveling, reducing the possibility of relative movement between the pressure platform 1 and the support frame 2 during leveling and preventing any impairment of leveling accuracy.

[0026] The locking component 4 is located on the support frame 2 via the friction surface 43. In the second direction, the relative movement of the support frame 2 and the pressure platform 1 can also be limited. This second direction is perpendicular to the first direction, where the first direction is the Z-axis direction and the second direction can be the X-axis direction, the Y-axis direction, or other directions perpendicular to the Z-axis direction. A mounting structure for connection to a drive element is also provided on the side of the support frame 2 facing away from the pressure platform 1, without any specific restrictions being imposed here.

[0027] In one embodiment of the present utility model, as in Fig. 1, Fig. 2, Fig. 5 and Fig. As shown in Figure 6, the locking component 4 comprises a connecting element 41 and a fastening element 42, and the connecting element 41 is provided on the pressure platform 1; the connecting element 41 has a first surface 4121 that abuts the support frame 2, the first surface 4121 being a friction surface 43, and the fastening element 42 is used to adjust the relative position of the first surface 4121 and the support frame 2 in the first direction. The fastening element 42 can be a Phillips screw, a slotted screw, or a Torx screw.

[0028] In the present embodiment, the first surface 4121 of the connecting element 41 serves as a friction surface 43 and bears against the support frame 2, whereby a frictional force can be generated between the first surface 4121 and the support frame 2 along a first direction. The fastening element 42 serves to fasten the connecting element 41 and the support frame 2, and the connecting element 41 and the support frame 2 can be joined together so that the connecting element 41 and the support frame 2 press against each other, generating positive pressure between the first surface 4121 and the support frame 2, thereby creating a frictional force between the first surface 4121 and the support frame 2.By adjusting the degree of fastening of the fastening element 42, the positive pressure generated between the first surface 4121 and the support frame 2 can be changed, and thereby the maximum static friction force between the first surface 4121 and the support frame 2 can be adjusted, so that during leveling the relative positions of the first surface 4121 and the support frame 2 are more easily adjusted in the first direction.

[0029] In an actual implementation, as in Fig. As shown in Figures 5 to 8, the first surface 4121 is arranged parallel to the first direction. The support frame 2 includes an extension section 21 parallel to the first direction. The extension section 21 has a first contact surface 211 that abuts the first surface 4121. The fastening element 42 can press the connecting element 41 and the extension section 21 opposite each other, so that the first surface 4121 and the first contact surface 211 press against each other to generate positive pressure, thereby generating a frictional force parallel to the first direction between the first surface 4121 and the first contact surface 211. The fastening element 42 can be a clamping device with adjustable strength. The first surface 4121 and the first contact surface 211 are pressed against each other by the relative clamping of the connecting element 41 and the extension section 21.The tighter the clamping device is clamped, the greater the positive pressure between the first surface 4121 and the first contact surface 211. The greater the maximum static frictional force between the first surface 4121 and the first contact surface 211, the looser the clamping device is. The smaller the positive pressure between the first surface 4121 and the first contact surface 211, the smaller the maximum static frictional force between the first surface 4121 and the first contact surface 211, so that the maximum static frictional force between the friction surface 43 of the locking component 4 and the support frame 2 can be adjusted.

[0030] In one embodiment of the present utility model, as in Fig. 5 to Fig. As shown in Figure 8, the connecting element 41 is provided with a connecting hole 4122 and the fastening element 42 comprises a connecting section 421 and an application section 422, the application section 422 is connected to one end of the connecting section 421, the support frame 2 is provided with a sliding hole 213, the other end of the connecting section 421 is guided through the sliding hole 213 and connected to the connecting hole 4122, the application section 422 is provided with a second surface 4221, the second surface 4221 rests against the support frame 2 and the second surface 4221 simultaneously serves as a friction surface 43.

[0031] In the present embodiment, the attachment section 422 and the connecting element 41 are located on different sides of the support frame 2, the attachment section 422 is connected to one end of the connecting section 421, the other end of the connecting section 421 passes through the sliding hole 213 of the support frame 2 and is connected to the connecting hole 4122 of the connecting element 41.Simultaneously, the first surface 4121 of the connecting element 41 and the second surface 4221 of the attachment section 422 press on the support frame 2 from different sides. The first surface 4121 and the second surface 4221 are both friction surfaces 43. By adjusting the strength of the connection between the connecting section 421 and the connecting element 41, the positive pressure between the connecting element 41 and the support frame 2, as well as between the attachment section 422 and the support frame 2, can be changed, thereby adjusting the maximum static friction force between the friction surface 43 and the support frame 2.At the same time, the connecting section 421 is suitable for sliding in the sliding hole 213; the sliding hole 213 serves to avoid the connecting section 421 when the pressure platform 1 and the support frame 2 slide relative to each other, in order to prevent the fastening element 42 from hindering the relative sliding between the pressure platform 1 and the support frame 2.

[0032] In the actual implementation, the support frame 2 has an extension section 21 parallel to the first direction. The sliding hole 213 is provided in the extension section 21, and the extension section 21 simultaneously has a first contact surface 211 and a second contact surface 212, which are opposite each other and bear against the first surface 4121 and the second surface 4221, respectively. Optionally, the connecting hole 4122 and the connecting section 421 can be connected to each other by threaded engagement. By tightening or loosening the fastening element 42, the positive pressure between the connecting element 41 and the support frame 2, as well as between the contact section 422 and the support frame 2, can be increased or decreased, thereby increasing or decreasing the maximum static friction force between the friction surface 43 and the support frame 2.Optionally, the connecting hole 4122 can also be a through hole, and the connecting section 421 passes through the connecting hole 4122 and is screwed in place with a nut, so that the fastening element 42 can also connect the connecting element 41 and the support frame 2. Optionally, the fastening element 42 can be a bolt or a screw, the connecting section 421 can be a threaded rod, and the attachment section 422 can be a nut. The connection direction of the connecting section 421 can be configured as follows:

[0033] It is understood that the first surface 4121 and the first contact surface 211 as well as the second surface 4221 and the second contact surface 212 are parallel to each other and are all arranged parallel to the first direction, in this way the friction surface 43 can not only generate a frictional force parallel to the first direction with the support frame 2, but also does not structurally hinder the pressure platform 1 and the support frame 2 from sliding relative to each other in the first direction.Simultaneously, the first surface 4121 and the first contact surface 211, as well as the second surface 4221 and the second contact surface 212, can limit the printing platform 1 and the support frame 2 in the second direction, the second direction being perpendicular to the first direction, the first direction being the Z-axis direction, the second direction being the X-axis direction, the Y-axis direction or other directions perpendicular to the Z-axis direction, the second directions in which the first surface 4121 and the first contact surface 211, as well as the second surface 4221 and the second contact surface 212, are mutually limited can be the same or different.If the second direction in which the first surface 4121 and the first mounting surface 211 mutually limit each other is the X-axis direction, then the second direction in which the second surface 4221 and the second mounting surface 212 mutually limit each other is a different direction, forming an angle of 30° or 45° with the X-axis direction. The two second directions are not perpendicular to each other, and the connection direction of the fastening element 42 runs parallel to the second direction in which the second surface 4221 and the second mounting surface 212 mutually limit each other. In this way, the printing platform 1 and the support frame 2 can be limited in the X-axis and Y-axis directions, thus preventing a relative displacement of the printing platform 1 and the support frame 2 in directions other than the first direction. The X-axis, Y-axis, and Z-axis are in . Fig. 1 shown.

[0034] In one embodiment of the present utility model, as in Fig. 5 to Fig. As shown in Figure 8, the connecting element 41 comprises a first part 411 and a second part 412, which are connected to each other at an angle, the first part 411 being connected to the surface of the printing platform 1 facing away from the printing plane 11, the second part 412 being arranged parallel to the first direction and being provided with a first surface 4121 and a connecting hole 4122.

[0035] In the present embodiment, the first part 411 is connected to the pressure platform 1 to increase the contact area between the connecting element 41 and the pressure platform 1 and to improve the stability of the connection between the connecting element 41 and the pressure platform 1. The second part 412 is provided with a first surface 4121, which abuts the support frame 2, and a connecting hole 4122 for connection to the connecting section 421 and is used for connection to the fastening element 42. The second part 412 is arranged parallel to the first direction to form a first surface 4121 parallel to the first direction. The first surface 4121 abuts the support frame 2 and is also suitable for relative movement with the support frame 2 along the first direction.

[0036] In the actual implementation, the connecting element 41 can be arranged in an L-shape. The first part 411 and the second part 412 are arranged vertically. The second part 412 is located within the extension section 21. The first part 411 is positioned on a surface of the printing platform 1 facing away from the printing plane 11, in order to be in close contact with the printing platform 1 and to improve the stability of the connection between the connecting element 41 and the printing platform 1. Optionally, the first part 411 and the first platform can be connected by a detachable connection method, such as a screw connection or a bolt connection. The first part 411 and the first platform can also be molded as a single piece.

[0037] In one embodiment of the present utility model, as in Fig. 1 to Fig. As shown in Figure 4, the first part 411 is provided with a limiting groove 4111, the support frame 2 is provided with a limiting projection 22, one end of the elastic element 3 is limited in the limiting groove 4111 and the other end of the elastic element 3 is placed on the limiting projection 22.

[0038] In the present embodiment, one end of the elastic element 3 is connected to the support frame 2 by resting on the limiting projection 22, and the other end of the elastic element 3 is confined within the limiting groove 4111 to connect to the first part 411 and is also indirectly connected to the pressure platform 1. It is understood that the elastic element 3 can be a spring, wherein one end of the elastic element 3 is located in the limiting groove 4111 and is confined and abutted against the groove wall of the limiting groove 4111, and the elastic element 3 cannot move within the limiting groove 4111, and wherein the other end of the elastic element 3 is placed on the limiting projection 22 and is confined and abutted against the side wall of the limiting projection 22.The elastic element 3 cannot move relative to the limiting projection 22, thus ensuring the stability of the set position of the elastic element 3.

[0039] In the actual implementation, the first part 411 can be provided with a limiting projection 22 and the support frame 2 can be provided with a limiting groove 4111, alternatively the first part 411 can be provided with a limiting projection 22 and the support frame 2 can also be provided with a limiting projection 22, alternatively the first part 411 can be provided with a limiting groove 4111 and the support frame 2 can also be provided with a limiting groove 4111, without any specific restrictions being made here.

[0040] In one embodiment of the present utility model, as in Fig. 5 to Fig. As shown in Figure 8, the sliding hole 213 extends along the first direction, the diameter of the connecting section 421 corresponds to the width of the sliding hole 213 and the width direction is perpendicular to the first direction; and / or the diameter of the connecting section 421 corresponds to the hole diameter of the connecting hole 4122.

[0041] In the present embodiment, the sliding hole 213 extends along the first direction. When the printing platform 1 and the support frame 2 slide relative to each other along the first direction, the connecting section 421 also moves along the sliding hole 213 relative to the support frame 2. The diameter of the connecting section 421 corresponds to the width of the sliding hole 213, so that the connecting section 421 and the sliding hole 213 can abut each other in the third direction for position limitation, the third direction being perpendicular to the first direction, and the second direction for abutting the second contact surface 212 and the second surface 4221 and for position limitation is also perpendicular, so that the printing platform 1 and the support frame 2 can be firmly connected to each other in directions other than the first direction.The diameter of the connecting section 421 corresponds to the hole diameter of the connecting hole 4122. Therefore, when the connecting section 421 is connected to the connecting hole 4122, the relative positions of the connecting section 421 and the connecting hole 4122 remain unchanged, and the fastening element 42 moves with the pressure platform 1.

[0042] In the actual implementation, the sliding hole 213 can also be provided on the connecting element 41, and the connecting hole 4122 can be provided on the extension section 21 of the support frame 2. The connecting section 421 of the fastening element 42 is guided through the sliding hole 213 and mounted in the connecting hole 4122. The contact section 422 and the extension section 21 press against the connecting element 41 from both sides. When leveling the pressure platform 1, the pressure platform 1 moves simultaneously along the first direction relative to the support frame 2 and the fastening element 42.

[0043] In one embodiment of the present utility model, as in Fig. 5 to Fig. As shown in Figure 8, there are several locking components 4, and also several elastic elements 3, each elastic element 3 is arranged near a locking component 4 and the spring force direction of the elastic element 3 runs parallel to the first direction.

[0044] In the present embodiment, the locking component 4 and the elastic element 3 are arranged in a one-to-one configuration. This allows the nozzle, during leveling, to push the print plane 11 downwards according to the position of the locking component 4 and the elastic element 3. That is, the nozzle's printing position overlaps with the projection of the elastic element 3 perpendicular to the first direction, thus improving the stability of the print platform 1's movement as it is pushed downwards by the nozzle. Furthermore, the spring force direction of the elastic element 3 is fixed along the first direction to ensure that the elastic element 3 deforms along this direction when the print platform 1 and the support frame 2 move relative to each other in the first direction, thereby improving the stability of the elastic element 3 supporting the print platform 1.

[0045] It is understandable that the distance between the print platform 1 and the support frame 2 along the first direction is much smaller than the overall size of the heated bed 100. In the present embodiment, the sizes of the elastic element 3 and the locking component 4 are also chosen to be smaller. During leveling, the multiple nozzle printing positions are typically spaced far apart to ensure leveling of the entire print plane 11. When the nozzle presses a specific printing position of the print platform 1 downwards along the first direction, the print platform 1 hardly moves at other printing positions. Therefore, a corresponding set of locking components 4 is provided at each pressure position of the print platform 1, so that the movement of the print platform 1 can be individually controlled at each printing position.Before leveling, the locking component 4, corresponding to each print position, can reduce or zero the maximum static friction between the friction surface 43 and the support element. The nozzle then pushes the print platform 1 downwards at the print position. After the print platform 1 has been pressed down into the correct position at a print position, the maximum static friction between the friction surface 43 of the locking component 4 and the support frame 2 is increased according to the print position. By sequentially leveling and locking the print platform 1 and the support frame 2 according to each print position, the leveling accuracy can be improved.An elastic element 3 can also be arranged near each group of locking components 4 to ensure the stability of the print platform 1 in each print position as it moves along the first direction when the nozzle pushes the print platforms 1 downwards in succession. Optionally, the elastic element 3 and the print position can also be arranged in a one-to-many configuration.

[0046] In the actual implementation, several elastic elements 3 are arranged between the printing platform 1 and the support frame 2, which can ensure stability when supporting the printing platform 1; the printing platform 1 is equipped with several locking components 4, which can ensure reliability and stability when the printing platform 1 and the support frame 2 are locked together.

[0047] In the actual implementation, the elastic element 3 is positioned between the first part 411 of the connecting element 41 and the support frame 2, so that, in a projection perpendicular to the first direction, the printing position can overlap with the connecting element 41 and the elastic element 3. In this way, when the nozzle pushes the printing platform 1 downwards in the printing position, it also pushes the elastic element 3 and the locking component 4 downwards, thus improving the smoothness of the movement of the printing platform 1 in the printing position.

[0048] In one embodiment of the present utility model, as in Fig. As shown in Figures 1 to 3, the projection of the printing platform 1 is rectangular perpendicular to the first direction and has four corners 12, and there are four locking components 4 and each locking component 4 is arranged according to a corner 12.

[0049] In the present embodiment, the pressure positions of the printing platform 1 are actually the four corners 12 of the printing platform 1, thus ensuring the accuracy and reliability of leveling the printing plane 11. Accordingly, a locking component 4 is mounted at each of the four corners 12 of the printing platform 1. During leveling, each corner 12, after being pressed into its position, can be locked by the locking component 4, thereby leveling and locking the four corners 12 sequentially. The elastic element 3 can also be arranged in a one-to-one configuration with the corner 12.

[0050] It is understandable that before leveling, the maximum static friction force between the friction surface 43 of each locking component 4 and the support frame 2 can be set to zero so that the pressure platform 1 rests naturally on the elastic element 3. Then, the maximum static friction force between the friction surface 43 and the support frame 2 can be slightly increased so that it is always no less than the difference between the spring force of the elastic element 3 and the gravity of the pressure platform 1 to assist with leveling.During leveling, it is necessary to select a reference point on the printing plane 11. The reference point is one of the four corners 12. The nozzle can first push one corner 12 downwards, and the downward-pressed corner 12 serves as the reference point to ensure that the reference point is the lowest point of the four corners 12. Subsequently, the nozzle pushes at least two more corners 12 downwards to complete the leveling of the printing platform 1 for the nozzle.

[0051] In the actual implementation, an elastic element 3 is arranged between each corner 12 and the support frame 2. The projection of the printing platform 1 perpendicular to the first direction can be rectangular, square, trapezoidal, or in another regular shape, for example as a triangle, pentagon, hexagon, or the like, and the locking component 4 and the elastic element 3 are positioned in a one-to-one arrangement with the corner 12.

[0052] In one embodiment of the present utility model, as in Fig. As shown in Figures 1, 2, 5 to 8, the printing platform 1 is provided with a fastening position 13 and at least two mounting positions 14, the printing platform 1 is rotatably connected to the support frame 2 at the fastening position 13, and the printing platform 1 is provided with a locking component 4 at each mounting position 14.

[0053] In the present embodiment, the printing platform 1 is rotatably connected to the support frame 2 at the mounting position 13. This means that the relative distance between the printing platform 1 at the mounting position 13 and the support frame 2 in the first direction remains unchanged, but the printing platform 1 is capable of being tilted relative to the mounting position 13. The printing platform 1 is also provided with at least two mounting positions 14, each of which is equipped with a locking component 4, allowing the printing platform 1 at the mounting position 14 and the support frame 2 to slide along the first direction. It is understood that an elastic element 3 can be provided at each mounting position 14, and that the printing platform 1 is connected to the support frame 2 at the mounting position 14 via the elastic element 3.Before leveling, the frictional force between the friction surface 43 of the locking component 4 and the support frame 2 is set to zero, and the pressure platform 1 is placed on the elastic element 3. The height of the pressure platform 1 at the fastening position 13 is not set higher than the height of the pressure platform 1 at the mounting position 14. Then, the position of the pressure plane 11 at the fastening position 13 is selected as the reference point, and at least two mounting positions 14 are pressed downwards for leveling.

[0054] In the actual implementation, the printing platform 1 can be provided at the mounting position 13 with a connecting element 41 and a fastening element 42, the connecting element 41 is provided with a connecting hole 4122, and the support frame 2 is provided with a through hole corresponding to the connecting hole 4122, the fastening element 42 passes through the through hole and is connected to the connecting hole 4122, the hole diameter of the through hole corresponds to the diameter of the connecting section 421 of the fastening element 42, in order to limit the printing platform 1 and the support frame 2 in each direction relative to each other, but the printing platform 1 can rotate relative to the support frame 2 about the fastening element 42.

[0055] The present utility model also provides a 3D printer comprising a print head mechanism and a heated bed 100. The specific design of the heated bed 100 relates to the embodiment described above. Since the present 3D printer incorporates all the technical solutions of all the embodiments described above, it exhibits at least all the advantageous effects achieved by the technical solutions of the embodiments described above, which are not described in detail here. The print head mechanism can level the print platform 1 of the heated bed 100. The specific leveling process is as described above. After leveling is complete, the relative positions of the print platform 1 and the support frame 2 are fixed by locking the locking component 4.

[0056] The above are merely exemplary embodiments of the present utility model and are not intended to limit the scope of the patent. Any equivalent structural transformation produced using the description of the utility model and the content of the accompanying drawings, under the technical concept of the utility model, and used either directly or indirectly in other related technical fields, is all covered by the scope of patent protection of the utility model.

Claims

[1] Heated bed, characterized by , that the heated bed includes the following: a printing platform which is provided with a printing plane for carrying a printing element; a support frame arranged on one side of the printing platform facing away from the printing plane, wherein the support frame and the printing platform are spaced apart from each other along the first direction and elastically connected to each other via an elastic element, the first direction being perpendicular to the printing plane; and a locking component arranged on the pressure platform, wherein the locking component has a friction surface that rests against the support frame, wherein the friction surface is arranged parallel to the first direction, wherein a frictional force acts between the friction surface and the support frame parallel to the first direction, wherein the frictional force is used to limit the relative movement of the pressure platform and the support frame in the first direction. [2] Heated bed according to claim 1, characterized by , that the locking component comprises a connecting element and a fastening element, wherein the connecting element is arranged on the pressure platform; wherein the connecting element has a first surface that abuts the support frame, the first surface being the friction surface, and wherein the fastening element is used to adjust the relative position of the first surface and the support frame in the first direction. [3] Heated bed according to claim 2, characterized by, that the connecting element is provided with a connecting hole, wherein the fastening element comprises a connecting section and an application section, wherein the application section is connected to one end of the connecting section, wherein the support frame is provided with a sliding hole, wherein the other end of the connecting section is guided through the sliding hole and connected to the connecting hole, wherein the application section is provided with a second surface, wherein the second surface rests against the support frame, wherein the second surface is also a friction surface. [4] Heated bed according to claim 3, characterized by , that the connecting element comprises a first part and a second part which are connected to each other at an angle, wherein the first part is connected to a side of the printing platform facing away from the printing plane, wherein the second part is arranged parallel to the first direction and is provided with a first surface and a connecting hole. [5] Heated bed according to claim 4, characterized by , that the first part is provided with a limiting groove, wherein the support frame is provided with a limiting projection, wherein one end of the elastic element is limited in the limiting groove and the other end of the elastic element is placed on the limiting projection. [6] Heated bed according to claim 3, characterized by , that the sliding hole extends along the first direction, wherein the diameter of the connecting section corresponds to the width of the sliding hole, the width direction being perpendicular to the first direction; and / or wherein the diameter of the connecting section corresponds to the hole diameter of the connecting hole. [7] Heated bed according to any one of claims 1 to 6, characterized bythat there are multiple locking components, including multiple elastic elements, and each of the elastic elements is located near a locking component, with the spring force direction of the elastic element being parallel to the first direction. [8] Heated bed according to any one of claims 1 to 6, characterized by , that the projection of the printing platform is arranged perpendicular to the first direction in a square shape and has four corners, with four locking components being present, each arranged according to one of the corners. [9] Heated bed according to any one of claims 1 to 6, characterized by that the printing platform has a fastening position and at least two mounting positions, wherein the printing platform is rotatably connected to the support frame at the fastening position, and wherein the printing platform is provided with a locking component at each mounting position. [10] 3D printers, characterized by that the 3D printer comprises a print head mechanism and a heated bed according to any one of claims 1 to 9, wherein the print head mechanism is adapted to push the print platform to level the print plane.

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