Heated bed and 3D printer

Abstract

A heated bed applied to a 3D printer, characterized in that the heated bed comprises the following: a housing provided with a receiving chamber, wherein a power supply area is formed in the receiving chamber, the power supply area being distinct from the central area of ​​the receiving chamber, and wherein the housing is used to support a pressure plate; and a heating module comprising multiple heating units, with both ends of each of the heating units connected to the power supply area, the heating unit forming a ring structure.

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] 3D printers create printed objects by extruding molten, bondable material layer by layer onto a build plate. To prevent the build plate temperature from dropping too low, which can lead to damage to the extruded material due to thermal expansion and contraction, and to warping, the build plate is usually placed on a heated bed to maintain a stable temperature. However, current heated bed mechanisms typically achieve heating via a single heating element, resulting in low heating efficiency. CONTENT OF THE PRESENT APPLICATION

[0003] The main purpose of the utility model is to provide a heated bed and a 3D printer with the aim of improving the heating efficiency of the heated bed.

[0004] To achieve the above-mentioned purpose, the present utility model provides a heated bed, the heated bed comprising the following: a housing provided with a receiving chamber, wherein a power supply area is formed in the receiving chamber, the power supply area being distinct from the central area of ​​the receiving chamber, and wherein the housing is used to support a pressure plate; and a heating module comprising multiple heating units, with both ends of each of the heating units connected to the power supply area, the heating unit forming a ring structure. In one embodiment, the receiving space has a central area and a peripheral area surrounding the central area, with the power supply area being located in the peripheral area; wherein the heated bed also includes a power supply module, the power supply module being located in the power supply area and being suitable for supplying power to the heating unit. In one embodiment, it is provided that several power supply areas are present, with several power supply modules also being present, each located in a power supply area; where both ends of each heating unit are connected to a power supply module.

[0005] In one embodiment, the power supply module comprises a power supply, a switch, a temperature sensor, and a control unit, wherein the power supply and the switch are suitable for series connection with the heating unit, wherein the control unit is electrically connected to the switch and the temperature sensor, wherein the temperature sensor is used to detect the temperature information of the heating unit, and wherein the control unit controls the state of the switch according to the temperature information.

[0006] In one embodiment, it is provided that several power supply areas are present and each heating unit is connected to one of the power supply areas to form a loop, with several loops formed by the several heating units being nested within each other; or wherein a single power supply area is available, wherein several heating units are arranged side by side and connected to the single power supply area, the heating units forming a loop and being arranged asymmetrically.

[0007] In one embodiment, the loop path formed by the heating units comprises a first section, a second section, and a third section, wherein the first section surrounds the circumferential edge of the receiving space and forms a first end and a second end that are spaced apart from each other, wherein the second section and the third section are each connected to the first and second ends, respectively, and wherein the second section and the third section extend parallel to the center of the receiving space and are connected to the power supply area.

[0008] In one embodiment, the heating module comprises a first heating tube and a second heating tube. wherein the extension directions of the first heating tube and the second heating tube are consistent; or wherein the first heating tube and the second heating tube have different radial dimensions; or wherein the radial dimension of the first heating tube is larger than the radial dimension of the second heating tube, wherein the first heating tube is arranged at the edge position of the housing, wherein the first heating tube is arranged at the central position of the housing; or wherein the first heating tube and the second heating tube are heated independently of each other, wherein the first heating tube is located at the edge position of the housing, and the second heating tube is located at the middle position of the housing.

[0009] In one embodiment, the heating module further comprises a heat-conducting element and an elastic element, wherein a boundary element is inserted into the receiving space, the boundary element being used to delimit the heating unit, the heat-conducting element being arranged between the heating unit and the housing, the elastic element having a first end and a second end opposite each other, the first end being attached to the wall of the space or the boundary element of the receiving space, and the second end being elastically in contact with the heating unit.

[0010] In one embodiment, the housing comprises an upper shell and a lower shell, the upper shell being used to support the pressure plate, with the upper shell and the lower shell enclosing and forming the receiving space; wherein the upper shell is provided with a limiting groove and several reinforcing ribs, wherein the heating unit is limited in the limiting groove, wherein the several reinforcing ribs are arranged in such a way that they avoid the limiting grooves.

[0011] The present utility model also proposes a 3D printer, the 3D printer comprising a print plate and a heated bed, as described above, wherein the print plate is detachably mounted on the heated bed.

[0012] The technical solution of the utility model consists of inserting a heating module into the housing's receiving chamber to heat the print bed placed on the housing, thus maintaining the print bed's temperature within a suitable range. The heating module comprises several heating units connected to the power supply area, forming a ring structure, and extends entirely within the receiving chamber. This improves the uniformity of the heating of the print bed, reduces the possibility of temperature differences in various areas of the print bed, and further minimizes the possibility of the print element tilting on the print bed.When the heated bed is heating up, multiple heating units can operate simultaneously to increase the heating speed and bring the print bed temperature to the preset temperature range as quickly as possible, allowing the 3D printer to print faster. This improves heating efficiency and, consequently, the printing efficiency of the 3D printer. BRIEF DESCRIPTION OF THE DRAWING

[0013] 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 exploded view of a heated bed in an embodiment provided by the present utility model; Fig. Figure 2 is a schematic structural representation of a heated bed in an embodiment provided by the present utility model; Fig. Figure 3 is a schematic structural representation of a heated bed in another embodiment provided by the present utility model; Fig. Figure 4 is a schematic structural representation of a heated bed in a further embodiment provided by the present utility model; Fig. Figure 5 is a schematic structural representation of a heated bed in yet another embodiment provided by the present utility model; Fig. Figure 6 is a schematic structural representation of a heated bed in a further embodiment provided by the present utility model; Description of the reference symbols:

[0014] 1. Housing; 11. Upper shell; 12. Lower shell; 13. Receiving chamber; 14. Central area; 15. Edge area; 16. Power supply area; 2. Heating unit; 21. First section; 22. Second section; 23. Third section; 3. Power supply module; 31. Power supply; 32. Switch.

[0015] 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

[0016] 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.

[0017] 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.

[0018] 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.

[0019] In relevant technology, with reference to Fig. 1 to Fig. 6. The 3D printer creates a printed element by extruding molten, bondable material layer by layer onto a build plate. To prevent the build plate temperature from dropping too low, which can lead to damage to the extruded material due to thermal expansion and contraction and cause warping, the build plate is usually placed on a heated bed to maintain a stable temperature. However, current heated bed mechanisms typically achieve heating via a single heating tube, resulting in low heating efficiency.

[0020] Based on the problems and concepts mentioned above, the present utility model proposes a heated bed comprising a housing 1 and a heating module. The housing 1 is provided with a receiving space 13 in which a power supply area 16 is formed. The power supply area 16 is offset from the central area 14 of the receiving space 13. The housing 1 serves to support a printing plate. The heating module comprises several heating units 2, with both ends of each of the heating units 2 being connected to the power supply area 16, and the heating units 2 forming a ring structure.

[0021] In the present embodiment, the heated bed must heat the print plate before printing to prevent the print element contacting the print plate from becoming misaligned due to thermal expansion and contraction, which could impair print quality. When the heated bed is heating, multiple heating units 2 can operate simultaneously to increase the heating rate of the heated bed and bring the temperature of the print plate to the preset temperature range as quickly as possible, allowing the 3D printer to print faster.

[0022] The heating unit 2 forms a ring structure and runs completely within the receiving space 13 to improve the uniformity of heating the heated bed by the heating module, to reduce the possibility of temperature differences in different areas of the heated bed and to further reduce the possibility of tilting of the print element on the print plate.

[0023] Both ends of the heating unit 2 are connected to the power supply area 16 in a closed loop. The power supply area 16 is located away from the central area 14 of the build chamber 13. It is understood that during 3D printing, the central area 14 of the build chamber 13 corresponds to the central area of ​​the print bed, which normally supports the printed element. Therefore, the power supply area 16 is located away from the central area 14 to prevent the central area 14 of the build chamber 13 from being without a heating element, which would result in the temperature of the central area 14 being too low and thus impairing the quality of the printed element. A power supply module 3 can be provided in the power supply area 16 to supply power to the heating module.Optionally, the power supply module 3 can also be located outside the recording room 13, in which case the two ends of the heating unit 2, after being connected to the power supply area 16, are connected to the power supply module 3 outside the recording room 13 via appropriate lines.

[0024] In one embodiment of the present utility model, as in Fig. 3 to Fig. As shown in Figure 6, the recording space 13 has a central area 14 and a peripheral area 15 surrounding the central area 14, and the power supply area 16 is located in the peripheral area 15; The heated bed also includes a power supply module 3, which is located in the power supply area 16 and is suitable for supplying power to the heating unit 2.

[0025] It is understood that the printing element is usually placed in the center of the printing plate; accordingly, the temperature control in the central area 14 of the receiving chamber 13 must be more precise, and the power supply module 3 does not generate any heat. To prevent an excessively low temperature in the central area 14, the power supply area 16 is located in the outer area 15.

[0026] At the same time, the power supply area 16 is located in the edge area 15 of the receiving space 13, which is closer to the edge of the housing 1 and is also suitable for connecting the heating unit 2 to the external power supply module 3; this also facilitates the assembly of the built-in power supply module 3 and is advantageous for the manufacture of the heated bed.

[0027] In the actual implementation, the initial end and the final end of the heating unit 2 are connected to the power supply area 16, and the middle part is bent in the receiving space 13 to pass through as many areas of the receiving space 13 as possible, thereby improving the uniformity of the heating of the housing 1.

[0028] In one embodiment of the present utility model, as in Fig. 2, Fig. 4 and Fig. As shown in Figure 5, there are several power supply areas 16 and also several power supply modules 3, and each power supply module 3 is arranged in a power supply area 16; with both ends of each heating unit 2 being connected to a power supply module 3.

[0029] In the present embodiment, the heating units 2 and the power supply modules 3 are arranged in a one-to-one correspondence, allowing each heating unit 2 to be switched on and off independently. When the heated bed is in operation, the power supply module 3 can control the heating units 2 within the receiving area 13 accordingly, depending on the area occupied by the print element on the print bed, to effect heating. In a projection perpendicular to the print bed, the heating units 2 that overlap with the print element are heated, while the other heating units 2 cannot be operated for cost reasons.

[0030] Specifically, the projection of housing 1 in the direction perpendicular to the print bed can be divided into several heating zones, and the multiple heating units 2 can each pass through several of these heating zones, thus traversing all heating zones. When the heated bed is in operation, a heating zone can be selected that overlaps with the projection of the print element to be printed. After the heating zone has been selected, the power supply module 3 controls the heating unit 2 as it moves through the selected heating zone to operate the heater and achieve regional heating of the heating module.

[0031] Optionally, the shape of the projection of housing 1 in a direction perpendicular to the printing plate is generally rectangular or square, and the shape of the heating area can be set to rectangular or square, with no specific restrictions being placed here.

[0032] In practice, the printing element is usually placed in the center of the printing plate. The larger the printing element, the greater its projection perpendicular to the printing plate from the center to the edge. Therefore, the extension paths of several heating units 2 can be referenced to the center of the receiving space 13 and set to different distances between the edge and the center. This facilitates the control of the heating units 2 for heating according to the projection of the printing element and prevents the operationally controlled heating units 2 from running over too many unselected heating areas in addition to the selected heating area, which would lead to a waste of the heating units 2's power.

[0033] It is understood that the heating area is referenced to the center point of the receiving space 13 and can be defined in the form of a circular ring, a rectangular ring, or another regular ring shape. At least one heating unit 2 can be arranged in each heating area, and the heating unit 2 can be extended along the shape of the heating area.

[0034] In another embodiment of the present utility model, at least two heating units 2 can be connected to the same power supply area 16, which is not specifically limited herein.

[0035] In one embodiment of the present utility model, as in Fig. 2 to Fig. As shown in Figure 6, the power supply module 3 is designed to include a power supply 31, a switch 32, a temperature sensor and a control unit. The power supply 31 and the switch 32 are suitable for being arranged in series with the heating unit 2. The control unit is electrically connected to the switch 32 and the temperature sensor. The temperature sensor serves to detect the temperature information of the heating unit 2. The control unit controls the state of the switch 32 according to the temperature information.

[0036] In the present embodiment, the power supply 31 provides the heating unit 2 with electrical energy for heat generation, and the switch 32 can control the switching on and off of the heating unit 2 from the power supply 31 and thus control whether the heating module is running.

[0037] The temperature sensor monitors whether the heating temperature of heating unit 2 is within the preset range. If the temperature sensor detects that the temperature of heating unit 2 exceeds a threshold temperature, the control unit automatically opens switch 32, thus improving the safety of the heated bed during heating.

[0038] In the actual implementation, the power supply 31 is controlled by the control module to output power. When the temperature of the heated bed rises to a preset temperature, the control module reduces the output power of the power supply 31 so that the heat emitted by the heating unit 2 and the heat dissipated by the heated bed to the environment form a dynamic equilibrium, thus maintaining the temperature within a preset range.

[0039] In one embodiment of the present utility model, as in Fig. As shown in Figure 2, it is provided that several power supply areas 16 are present and each heating unit 2 is connected to one of the power supply areas 16 to form a loop; wherein several loops 2 formed by the several heating units are nested within each other.

[0040] Since the printing element in the present embodiment is located in the center of the printing plate, the multiple loops formed by the multiple heating units 2 are nested within each other and the annular heating area can be subdivided from the central position to the edge position, each heating unit 2 is supplied with power via a power supply area 16, so that each annular heating area can be heated independently of each other in order to accommodate printing elements of different sizes.

[0041] Optionally, the heating units 2 are arranged in a one-to-one correspondence to the power supply areas 16, and the extension paths of the heating units 2 can be arranged centrally symmetrically or axially symmetrically, so that the heating module can heat the housing 1 more evenly. Using the example of a rectangular heated bed, each heating unit 2 forms a quasi-rectangular loop, the centers of each loop are connected to each other, and the distances between the edge and the center gradually increase.

[0042] In another embodiment, as in Fig. 4 and Fig. As shown in Figure 5, the heating units 2 are arranged symmetrically, each heating unit 2 forms a quasi-rectangular loop, and the loop formed by the multiple heating units 2 is arranged symmetrically along the X-axis or the Y-axis in a projection perpendicular to the printing plate.

[0043] Optionally, the respective power supply area 16 of each heating unit 2 is arranged in the edge area 15, and the extension tracks of the heating units 2 can be regular or irregular, but are ultimately connected to the power supply area 16, which is located in the edge area 15.

[0044] Optionally, if the loop paths of the multiple heating units 2 are nested within each other, the multiple heating units 2 can also be connected to the same power supply area 16, whereby at this time the center point of each loop is different from each other.

[0045] In one embodiment of the present utility model, as in Fig. As shown in Figure 3, there is a power supply area 16, and several heating units 2 are arranged side by side and connected to a power supply area 16; wherein the heating units 2 form a loop and are arranged asymmetrically.

[0046] In the present embodiment, the heating units 2 and the power supply areas 16 are arranged in a one-to-many configuration to uniformly control the heating states of the heating units 2. The multiple heating units 2 are arranged side by side, i.e., the extension paths of the multiple heating units 2 are similar. Compared to multiple heating units 2 arranged in different areas, such an arrangement significantly improves the overall heating efficiency of the heated bed and further increases the heating speed of the heated bed.

[0047] In one embodiment of the present utility model, as in Fig. As shown in Figure 3, the heating unit 2 forms a loop track comprising a first section 21, a second section 22 and a third section 23, wherein the first section 21 surrounds the periphery edge of the receiving space 13 and forms a first end and a second end spaced apart from each other, wherein the second section 22 and the third section 23 are each connected to the first and second ends respectively, the second section 22 and the third section 23 extending parallel to the center of the receiving space 13 and being connected to the power supply area 16.

[0048] In the present embodiment, the heating unit 2 is arranged asymmetrically. The first section 21 surrounds the circumferential edge of the receiving space 13 and is interrupted at a similar location to form a first and a second end. The first section 21 and the second section 22 are each connected to the first and second ends, respectively, and are bent relative to the first section 21 towards the central region 14 of the receiving space 13. After extending a certain distance towards the central region 14, the first section 21 and the second section 22 are bent towards the edge position and connected to the power supply area 16 to form a complete loop. In this way, the heating unit 2 is arranged both around the circumferential edge of the receiving space 13 and extends through the central region 14 of the receiving space 13, thus ensuring that the heating unit 2 heats the housing 1 uniformly.

[0049] Optionally, the first section 21 and the second section 22 in the central area 14 can be extended in an S-shape to increase the heating surface of the heating unit 2 and the heating efficiency, while also promoting the uniformity of the heating.

[0050] It is understandable that the power supply area 16 is arranged in the edge region 15 in the present embodiment. Since the first section 21 and the second section 22 run in the central region 14, they are bent towards the circumferential edge.

[0051] Optionally, when arranging several heating units 2 side by side and connecting them to the same heating area, the paths of the heating units 2 can also be arranged symmetrically, which is not specifically limited here.

[0052] In one embodiment of the present utility model, the heating module comprises a first heating tube and a second heating tube, wherein the extension directions of the first heating tube and the second heating tube are the same, so that the first heating tube and the second heating tube can heat the housing uniformly, thereby reducing the temperature difference of the housing.

[0053] Optionally, the radial dimensions of the first and second heating tubes can differ, and their heating capacities can be determined by these dimensions. The larger the radial dimension, the greater the heating capacity of the tube; conversely, the smaller the radial dimension, the less efficient the heating capacity. In areas of the casing where heating is insufficient, a heating tube with a large radial dimension is used to compensate for the inadequate heating in that area.

[0054] Optionally, the radial dimension of the first heating tube is larger than the radial dimension of the second heating tube, with the first heating tube being located at the edge position of the housing, with the first heating tube being located at the middle position of the housing, with the first heating tube being located at the edge position of the housing to improve heating efficiency at the edge position and to avoid the problem of insufficient temperature at the edge of the heated bed, which leads to tilting of the printed element and seriously impairs print quality.

[0055] Optionally, the first and second heating tubes can be heated independently, with the first heating tube located at the edge of the housing and the second heating tube located in the center of housing 1. If the printed model is small, it only covers the center of housing 1, and only the second heating tube is heated. If the printed model is large, the first and second heating tubes are heated synchronously.

[0056] In one embodiment of the present utility model, as in Fig. As shown in Figure 2, the heating module additionally comprises a heat-conducting element and an elastic element, and a limiting element is arranged in the receiving space 13, which limits the position of the heating unit 2, and the heat-conducting element is arranged between the heating unit and the housing, the elastic element has a first end and a second end that are opposite each other, the first end is attached to the wall of the room or the limiting element of the receiving space 13 and the second end rests elastically against the heating unit 2.

[0057] In the present embodiment, a thermally conductive element is also provided between the heating unit 2 and the housing 1. This element can rapidly transfer the heat released by the heating unit 2 to the housing 1, thereby accelerating the heat conduction rate of the heating unit 2 and increasing the heating rate of the heated bed. Optionally, the thermally conductive element can be filled into the receiving chamber 13 to improve the uniformity of the heat transfer. The thermally conductive element can consist of thermally conductive silicone, thermally conductive graphite, a thermally conductive insert, or the like.

[0058] Optionally, heating unit 2 is a heating tube with good bending properties, allowing it to be bent along various paths. Heating unit 2 can also be a heating wire.

[0059] In the present embodiment, the heating unit 2 is fixed by a limiting element. It is understood that the receiving chamber 12 has a top wall and a bottom wall arranged opposite each other, and that the limiting element can be arranged on either the top wall or the bottom wall to secure the heating unit 2. Generally, the heating unit 2 is secured to the top wall by a limiting element to heat the pressure plate located on the side of the top wall facing away from the bottom wall. The limiting element can be a bracket structure or consist of two opposing limiting plates, with the heating unit 2 confined between the two limiting plates.

[0060] It is understood that the first end of the elastic element is attached to the wall or boundary element of the receiving chamber 13, with the second end resting against the heating unit 2. When the heating unit 2 heats up and expands, the elastic element deforms to compensate for the deformation of the heating unit 2 and thus ensure that the housing 1 does not deform. This helps to maintain the flatness of the housing 1 and the pressure plate and is also advantageous for containing the heating unit 2. Optionally, the heating unit 2 is generally arranged in contact with the top wall of the receiving chamber to ensure a heating effect on the pressure plate. Optionally, the heating unit 2 rests against the top wall of the receiving chamber, and the first end of the elastic element is connected to the bottom wall, with the second end resting against the heating unit 2.When heating unit 2 expands, the elastic element is compressed; optionally, heating unit 2 rests against the top wall of the receiving space, and the first end of the elastic element is connected to the top wall or a boundary element provided on the top wall, while the second end rests against heating unit 2. When heating unit 2 expands, the elastic element also expands. In this way, the elastic element can not only compensate for the expansion of heating unit 2 but also fix heating unit 2 in situ.

[0061] In one embodiment of the present utility model, as in Fig. 1 and Fig.As shown in Figure 2, the housing 1 comprises an upper shell 11 and a lower shell 12, the upper shell 11 serves to support the pressure plate and the upper shell 11 and the lower shell 12 enclose and form a receiving space 13; the upper shell 11 is provided with a limiting groove and several reinforcing ribs, and the heating unit 2 is limited in the limiting groove, the several reinforcing ribs being arranged so that they avoid the limiting grooves.

[0062] In the present embodiment, the heating unit 2 is arranged in close contact with the groove wall of the limiting groove, thereby increasing the contact area with the upper shell 11. The upper shell 11 is used to support the pressure plate, thus improving the efficiency and uniformity of heating the pressure plate. The lower shell 12 covers the notch of the limiting groove to provide a seal.

[0063] It is understood that the setting path of the limiting groove corresponds to the extension path of the preset limiting groove and that the setting of the limiting groove is conducive to the positioning and mounting of the heating unit 2; in order to prevent the heating unit 2 from shifting in the receiving space 13 and impairing the heating effect, the heating unit 2 is limited in the limiting groove of the upper shell 11.

[0064] In addition to the position of the limiting groove on the upper shell 11, reinforcing ribs can be attached to improve the strength of the upper shell 11 and to prevent the upper shell 11 from deforming easily, thereby ensuring the flatness of the upper shell 11 and the pressure plate and guaranteeing the form quality of the printing element.

[0065] Optionally, the upper shell 11 and the lower shell 12 are connected to each other by a detachable connection method such as screws or buckles. The lower shell 12 and the upper shell 11 are further equipped with limiting structures corresponding to the power supply module 3 in order to confine the power supply module 3 and thus ensure its stability within the receiving space 13. In practice, the heated bed must be mounted on a guide rail. A bracket for mounting on the guide rail can be provided on the side of the lower shell 12 facing away from the upper shell 11. A thermal insulation layer can also be provided on the lower shell 12 to slow down the rate at which heat is dissipated from the heated bed, thereby improving its heating efficiency.

[0066] The present utility model also provides a 3D printer comprising a print plate and a heated bed; the specific design of the heated bed 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 plate can be detachably mounted on the heated bed, for example, by magnetic attraction of a magnetic element or by snapping a locking mechanism into place.

[0067] 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 applied to a 3D printer, characterized by , that the heated bed includes the following: a housing provided with a receiving chamber, wherein a power supply area is formed in the receiving chamber, the power supply area being distinct from the central area of ​​the receiving chamber, and wherein the housing is used to support a pressure plate; and a heating module comprising multiple heating units, with both ends of each of the heating units connected to the power supply area, the heating unit forming a ring structure. [2] Heated bed according to claim 1, characterized bythat the recording space has a central area and a peripheral area surrounding the central area, wherein the power supply area is located in the peripheral area; wherein the heated bed also includes a power supply module, wherein the power supply module is arranged in the power supply area and is suitable for supplying power to the heating unit. [3] Heated bed according to claim 2, characterized by that there are multiple power supply areas, with multiple power supply modules also being present, each located in a power supply area; with both ends of each heating unit being connected to a power supply module. [4] Heated bed according to claim 2, characterized by, that the power supply module comprises a power supply, a switch, a temperature sensor and a control unit, wherein the power supply and the switch are suitable for series connection with the heating unit, wherein the control unit is electrically connected to the switch and the temperature sensor, wherein the temperature sensor is used to detect the temperature information of the heating unit, and wherein the control unit controls the state of the switch according to the temperature information. [5] Heated bed according to claim 1, characterized bythat multiple power supply areas are present and each heating unit is connected to one of the power supply areas to form a loop, with multiple loops formed by the multiple heating units being nested within each other; or wherein a single power supply area is present, with multiple heating units arranged side by side and connected to the single power supply area, the heating units forming a loop path and being arranged asymmetrically. [6] Heated bed according to claim 5, characterized by, that the loop path formed by the heating units comprises a first section, a second section and a third section, wherein the first section surrounds the periphery edge of the receiving space and forms a first end and a second end spaced apart from each other, wherein the second section and the third section are each connected to the first and second ends respectively, the second section and the third section extending parallel to the center of the receiving space and being connected to the power supply area. [7] Heated bed according to any one of claims 1 to 6, characterized bythat the heating module comprises a first heating tube and a second heating tube, wherein the extension directions of the first heating tube and the second heating tube are consistent; or wherein the first heating tube and the second heating tube have different radial dimensions; or wherein the radial dimension of the first heating tube is larger than the radial dimension of the second heating tube, wherein the first heating tube is arranged at the edge position of the housing, or wherein the first heating tube is arranged at the central position of the housing; or wherein the first heating tube and the second heating tube are heated independently of each other, wherein the first heating tube is arranged at the edge position of the housing, or wherein the second heating tube is arranged at the central position of the housing. [8] Heated bed according to any one of claims 1 to 6, characterized by, that the heating module further comprises a heat-conducting element and an elastic element, wherein a boundary element is inserted into the receiving space, the boundary element being used to limit the heating unit, the heat-conducting element being arranged between the heating unit and the housing, the elastic element having a first end and a second end opposite each other, the first end being attached to the wall of the space or the boundary element of the receiving space, the second end being elastically in contact with the heating unit. [9] Heated bed according to any one of claims 1 to 6, characterized by, that the housing comprises an upper shell and a lower shell, wherein the upper shell is used to support the pressure plate, and wherein the upper shell and the lower shell enclose and form the receiving space; wherein the upper shell is provided with a limiting groove and several reinforcing ribs, wherein the heating unit is limited in the limiting groove, and wherein the several reinforcing ribs are arranged such that they avoid the limiting grooves. [10] 3D printers, characterized by that the 3D printer comprises a print plate and a heated bed according to one of claims 1 to 9, wherein the print plate is detachably mounted on the heated bed.

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