Release film mounting mechanism and 3D printer

Abstract

The utility model relates to a release film mounting mechanism and a 3D printer. The release film mounting mechanism comprises a trough plate used for mounting a release film assembly; the mounting plate is arranged opposite to the trough plate; the locking piece is used for locking the trough plate and the mounting plate; the positioning piece comprises a zero-point positioning pin and a positioning cylinder, the zero-point positioning pin is inserted into the positioning cylinder, one of the zero-point positioning pin and the positioning cylinder is arranged on the trough plate, and the other one of the zero-point positioning pin and the positioning cylinder is arranged on the mounting plate. According to the release film mounting mechanism, the positioning piece is arranged to be of a structure that the zero-point positioning pin is matched with the positioning barrel, so that positioning of the trough plate on the mounting plate is more accurate, the positioning precision is smaller than or equal to 3 micrometers, it can be guaranteed that the zero-point positioning pin can be aligned with the positioning barrel, and the positioning progress can be accelerated; meanwhile, the zero-point positioning pin is not prone to inclining during positioning fit, and abrasion or deformation of the zero-point positioning pin cannot be caused.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of 3D printers, in particular to a release film mounting mechanism and a 3D printer. BACKGROUND

[0002] As an auxiliary material in the 3D printing process, the release film mainly plays a role in releasing the glue, which can prevent the printing material from sticking to the printing platform, thereby ensuring the smooth progress of the printing process. Among them, the release film is usually clamped between two pressing plates and installed on the mounting plate at the 3D printing platform with a trough plate as a carrier. The trough plate and the mounting plate are assembled through the combination of positioning pins and threaded parts, but this positioning method has poor positioning accuracy and is not conducive to the installation of the trough plate and the mounting plate. CONTENT OF THE UTILITY MODEL

[0003] Therefore, it is necessary to provide a release film mounting mechanism and a 3D printer aiming at the above technical problems.

[0004] A release film mounting mechanism, comprising:

[0005] a trough plate for mounting a release film assembly;

[0006] a mounting plate arranged opposite to the trough plate;

[0007] a locking piece for locking the trough plate and the mounting plate; and

[0008] a positioning piece comprising a zero-point positioning pin and a positioning cylinder, the zero-point positioning pin is inserted into the positioning cylinder, one of the zero-point positioning pin and the positioning cylinder is arranged on the trough plate, and the other is arranged on the mounting plate.

[0009] In one of the embodiments, the mounting plate has an opening for exposing the release film of the release film assembly.

[0010] The locking piece and the positioning piece are both arranged in multiple, all the locking pieces and all the positioning pieces are arranged around the opening.

[0011] In one of the embodiments, the locking piece is arranged in two, the positioning piece is arranged in four and is divided into two groups, the two groups of positioning pieces are arranged on opposite sides of the opening respectively, and each locking piece is arranged between the two positioning pieces of the corresponding group.

[0012] In one of the embodiments, the zero-point positioning pin is in interference fit with the trough plate or the mounting plate, and / or the positioning cylinder is in interference fit with the mounting plate or the trough plate.

[0013] In one of the embodiments, the end of the zero-point positioning pin close to the positioning cylinder has a dismounting groove.

[0014] In one of the embodiments, the locking member has a screw part which is screwed through the trough plate and the mounting plate, or the screw part is screwed through the mounting plate and the trough plate.

[0015] In one of the embodiments, the locking member further has a screwing part which is away from the screw part and is located outside the trough plate or the mounting plate.

[0016] In one of the embodiments, the outer circumferential surface of the screwing part is provided with anti-skid lines.

[0017] In one of the embodiments, the mounting plate has an opening.

[0018] The trough plate comprises a bearing part and a fixing part which are connected, the bearing part is used for mounting the release film assembly and is staggered with the fixing part in the axial direction of the zero-point positioning pin, so that the fixing part is overlapped on the mounting plate and the bearing part is extended into the opening.

[0019] A 3D printer comprises a frame, a release film assembly and a release film mounting mechanism as described in any of the above embodiments.

[0020] The mounting plate of the release film mounting mechanism is arranged on the frame, and the release film assembly is arranged on the trough plate of the release film mounting mechanism.

[0021] The release film mounting mechanism and the 3D printer described above, by arranging the positioning member into the structure that the zero-point positioning pin cooperates with the positioning cylinder, not only makes the positioning of the trough plate on the mounting plate more accurate, so that the positioning accuracy is ≤3 microns, but also ensures that the zero-point positioning pin can be aligned with the positioning cylinder, which can speed up the positioning process, and the zero-point positioning pin is not easy to tilt when cooperating with the positioning cylinder, which will not cause wear or deformation of the zero-point positioning pin. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 The figure is a perspective structural schematic view of the release film mounting mechanism provided by one of the embodiments of the present application and mounted with the release film assembly from a first angle.

[0023] Figure 2 The figure is a perspective structural schematic view of the release film mounting mechanism provided by one of the embodiments of the present application and mounted with the release film assembly from a second angle.

[0024] Figure 3 The figure is an exploded schematic view of the release film mounting mechanism provided by one of the embodiments of the present application and mounted with the release film assembly.

[0025] Figure 4A top view of a release film mounting mechanism provided with a release film assembly according to an embodiment of the present application.

[0026] Figure 5 A top view of a release film mounting mechanism provided with a release film assembly according to an embodiment of the present application. Figure 4 A sectional view of the release film mounting mechanism provided in the A-A direction.

[0027] Figure 6 A sectional view of the release film mounting mechanism provided in the B-B direction. Figure 4 A sectional view of the release film mounting mechanism provided in the B-B direction.

[0028] Figure 7 A sectional view of the release film mounting mechanism provided in the C direction. Figure 6 An enlarged view of the release film mounting mechanism provided at C.

[0029] Figure 8 A structural schematic view of a locking member according to an embodiment of the present application.

[0030] In the drawings, the reference signs are explained as follows:

[0031] 10, release film mounting mechanism; 100, trough plate; 110, bearing portion; 120, fixing portion; 100a, first light hole; 200, mounting plate; 200a, opening; 200b, second mounting hole; 200c, first screw hole; 300, locking member; 310, screw portion; 320, screwing portion; 400, positioning member; 410, zero positioning pin; 410a, dismounting groove; 411, positioning portion; 412, assembling portion; 420, positioning cylinder; positioning groove; 20, release film assembly; 20a, release film; 20b, upper pressing plate; 20c, lower pressing plate. DETAILED DESCRIPTION

[0032] In order to make the above objectives, features and advantages of the present application more apparent, specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be practiced in a number of different ways beyond the specific embodiments described and it is therefore contemplated to cover all such modifications as fall within the scope of the application. It should be noted that the specific embodiments of the present application do not limit the scope of the present application.

[0033] In the description of the application, it should be understood that, if there are these terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the application.

[0034] In addition, if there are these terms "first", "second", these terms are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first", "second" can explicitly or implicitly include at least one of the features. In the description of the application, if the term "multiple" appears, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise explicitly specified.

[0035] In this application, unless otherwise explicitly specified and limited, if there are terms such as "mounting", "connecting", "connecting", "fixing" and the like, these terms should be broadly understood. For example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0036] In this application, unless otherwise explicitly specified and limited, if there are similar descriptions such as "first feature on or under second feature", the meaning can be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" of the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" of the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0037] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only embodiment.

[0038] As an auxiliary material in the 3D printing process, the release film mainly plays a role in releasing the glue, which can prevent the printing material from sticking to the printing platform, thereby ensuring the smooth progress of the printing process. The release film is usually clamped between the two pressure plates and installed on the mounting plate at the 3D printing platform with the trough plate as the carrier. Among them, the trough plate is first positioned with a locating pin before being locked with the mounting plate by a screw part to facilitate the screw connection between the trough plate and the mounting plate. However, the locating pins currently used on the market are usually cylindrical locating pins, which require a small clearance fit with the circular locating hole. It is precisely because of the small clearance fit that the positioning accuracy is poor, and the cylindrical locating pin is not easy to align with the locating hole, which makes the installation of the trough plate on the mounting plate more troublesome.

[0039] In this regard, Figures 1 to 6 As shown, an embodiment of the present application provides a release film installation mechanism 10, which includes a trough plate 100, a mounting plate 200, a locking member 300 and a positioning member 400; the trough plate 100 is used to install the release film assembly 20; the mounting plate 200 and the trough plate 100 are arranged opposite to each other; the locking member 300 is used to lock the trough plate 100 and the mounting plate 200; the positioning member 400 includes a zero-point positioning pin 410 and a positioning cylinder 420, the zero-point positioning pin 410 is inserted into the positioning cylinder 420, one of the zero-point positioning pin 410 and the positioning cylinder 420 is provided on the trough plate 100, and the other is provided on the mounting plate 200.

[0040] This release film mounting mechanism 10 is used in a 3D printer, primarily for mounting a release film 20a on the 3D printer's print platform. Specifically, the mounting plate 200 of the release film mounting mechanism 10 is mounted on the 3D printer's frame. The mounting plate 200 can be secured to the 3D printer's frame using threaded members (e.g., screws), snap fasteners, or other methods.

[0041] The release film 20a is not directly mounted on the trough plate 100 of the release film mounting mechanism 10, but is mounted on the trough plate 100 in the form of a release film assembly 20. Figure 7The release film assembly 20 includes an upper pressing plate 20b, a lower pressing plate 20c and a release film 20a clamped between the upper pressing plate 20b and the lower pressing plate 20c, wherein the upper pressing plate 20b has a first through hole, and the lower pressing plate 20c has a second through hole, and the first through hole corresponds to the second through hole to expose the release film 20a.

[0042] After the release film assembly 20 and the trough plate 100 are assembled, the trough plate 100 and the mounting plate 200 are first positioned by the positioning member 400 and then locked by the locking member 300. The zero point positioning pin 410 used in this application is different from the cylindrical positioning pin used in the market. Figure 5 The positioning portion 411 of the zero point positioning pin 410 (i.e., the portion of the zero point positioning pin 410 for inserting into the positioning cylinder 420) is truncated cone-shaped, not cylindrical, and the positioning groove in the positioning cylinder 420 used to accommodate the positioning portion 411 is also truncated cone-shaped, but the diameter change trends of the two are opposite. The outer diameter of the positioning portion 411 of the zero point positioning pin 410 gradually decreases along the insertion direction of the zero point positioning pin 410, and the width of the positioning groove of the positioning cylinder 420 gradually increases along the insertion direction of the zero point positioning pin 410. It is based on this point When the zero-point positioning pin 410 is placed above the positioning cylinder 420, the diameter of the positioning portion 411 at the end closest to the positioning cylinder 420 is the smallest and is smaller than the width of the positioning slot opening 200a. This allows the positioning slot opening 200a to have sufficient space to accommodate the positioning portion 411 of the zero-point positioning pin 410. The positioning portion 411 of the zero-point positioning pin 410 is more easily aligned with the positioning slot opening 200a, thereby smoothly entering the positioning slot opening 200a and then smoothly entering the bottom of the positioning slot with the guidance of the inclined inner wall of the positioning slot. Figure 5 The direction of the straight arrow in FIG. 4 is the insertion direction of the zero point positioning pin 410 .

[0043] Furthermore, because multiple positioning steel balls are evenly distributed along the circumference of zero-point positioning pin 410, they apply pressure in multiple directions at equal intervals around the circumference. The forces of zero-point positioning pin 410 and positioning cylinder 420, both of equal hardness, converge toward the center under the balance of force. This centering effect ensures high repeatability of positioning element 400, enabling precise positioning along the axis with a positioning accuracy of ≤3 microns.

[0044] It can be seen that the release film installation mechanism 10 of the present application, by setting the positioning part 400 to a structure in which the zero-point positioning pin 410 cooperates with the positioning cylinder 420, not only makes the positioning of the trough plate 100 on the mounting plate 200 more accurate, so that the positioning accuracy is ≤3 microns, but also ensures that the zero-point positioning pin 410 can be aligned with the positioning cylinder 420, which can speed up the positioning process. At the same time, the zero-point positioning pin 410 is not easy to tilt during positioning and will not cause wear or deformation of the zero-point positioning pin 410.

[0045] As shown in the drawings, Figure 3 In some embodiments of the present application, the mounting plate 200 has an opening 200a for exposing the release film 20a of the release film assembly 20; the locking members 300 and the positioning members 400 are both provided in plurality, and all the locking members 300 and all the positioning members 400 are arranged around the opening 200a. By arranging the locking members 300 around the opening 200a of the mounting plate 200, the connection between the mounting plate 200 and the trough plate 100 can be ensured to be firm; based on this, the present application also arranges the positioning members 400 around the opening 200a of the mounting plate 200, so that the positioning members 400 are distributed close to the locking members 300, so that the locking area between the mounting plate 200 and the trough plate 100 is not easy to be misaligned again after positioning, facilitating the subsequent locking of the locking members 300.

[0046] In a specific embodiment, as shown in the drawings, Figure 2 The locking members 300 are provided in two, and the positioning members 400 are provided in four and are divided into two groups, and the two groups of positioning members 400 are respectively arranged on the opposite sides of the opening 200a, and each locking member 300 is arranged between the two positioning members 400 of the corresponding group. By arranging the number and position of the locking members 300 and the positioning members 400 in this way, the positioning effect and the locking effect between the trough plate 100 and the mounting plate 200 can be ensured, and the locking members 300 and the positioning members 400 can be reduced as much as possible, which can simplify the structure of the release film mounting mechanism 10, facilitate production and processing, and also facilitate the assembly of the trough plate 100 and the mounting plate 200.

[0047] As an example, as shown in the drawings, Figure 3 The opening 200a of the mounting plate 200 is generally rectangular, and the two groups of positioning members 400 are respectively arranged on the side of the corresponding short side of the opening 200a, and of course can also be arranged on the side of the long side.

[0048] In order to avoid the zero-point positioning pin 410 and the positioning cylinder 420 from shaking during positioning and locking, affecting the disassembly of the release film mounting mechanism 10, in some embodiments of the present application, the zero-point positioning pin 410 is in interference fit with the trough plate 100 or the mounting plate 200, and / or the positioning cylinder 420 is in interference fit with the mounting plate 200 or the trough plate 100.

[0049] As an example, refer to Figure 5, the zero point positioning pin 410 can be in interference fit with the chute plate 100, and the positioning cylinder 420 can be in interference fit with the mounting plate 200. Among them, the zero point positioning pin 410 has an assembly part 412 away from the positioning part 411, and the side of the chute plate 100 facing the mounting plate 200 can be provided with a first mounting hole, the diameter of the first mounting hole is smaller than the diameter of the assembly part 412 of the zero point positioning pin 410, and the first mounting hole is used for interference fit with the assembly part 412 of the zero point positioning pin 410; the mounting plate 200 can be provided with a second mounting hole 200b, and the diameter of the second mounting hole 200b is smaller than the diameter of the positioning cylinder 420, and the second mounting hole 200b is used for interference fit with the positioning cylinder 420.

[0050] As another example, the zero point positioning pin 410 can be in interference fit with the mounting plate 200, and the positioning cylinder 420 can be in interference fit with the chute plate 100. Among them, the side of the mounting plate 200 facing the chute plate 100 can be provided with a first mounting hole, and the side of the chute plate 100 facing the mounting plate 200 can be provided with a second mounting hole.

[0051] As another example, a part of the zero point positioning pin 410 is in interference fit with the chute plate 100, and the remaining part of the zero point positioning pin 410 is in interference fit with the mounting plate 200; a part of the zero point positioning pin 410 is in interference fit with the mounting plate 200, and the remaining part of the zero point positioning pin 410 can be in interference fit with the chute plate 100. Among them, the mounting plate 200 can be provided with a first mounting hole and a second mounting hole 200b, and the chute plate 100 can be provided with a first mounting hole and a second mounting hole.

[0052] Referring to Figure 3 and Figure 5 , the end of the zero point positioning pin 410 close to the positioning cylinder 420 (i.e. the positioning part 411) has a disassembly groove 410a. The disassembly tool can be installed in the disassembly groove 410a to disassemble the zero point positioning pin 410. Among them, the connection mode of the disassembly tool and the zero point positioning pin 410 can be screwing, and the inner wall of the disassembly groove 410a is provided with threads.

[0053] In some embodiments of the present application, as shown in Figure 8 , the locking part 300 has a screw part 310, and the screw part 310 is screwed through the chute plate 100 and the mounting plate 200, or the screw part 310 is screwed through the mounting plate 200 and the chute plate 100. The chute plate 100 and the mounting plate 200 are locked by the screw, and the disassembly and assembly of the chute plate 100 on the mounting plate 200 can be realized.

[0054] As an example, the screw part 310 of the locking part 300 is screwed through the chute plate 100 and the mounting plate 200. Among them, the chute plate 100 has a first light hole 100a for the screw part 310 to pass through, and the mounting plate 200 has a first screw hole 200c for screwing with the screw part 310, and the first screw hole 200c is aligned with the first light hole 100a.

[0055] As another example, the screw portion 310 of the locking member 300 passes through the mounting plate 200 and is screwed to the trough plate 100. The trough plate 100 has a first screw hole, and the mounting plate 200 has a first light hole.

[0056] As another example, a portion of the screw portion 310 of the locking member 300 passes through the trough plate 100 and is screwed to the mounting plate 200, while another portion of the screw portion 310 of the locking member 300 passes through the mounting plate 200 and is screwed to the trough plate 100. The trough plate 100 has a first optical hole 100a and a first screw hole, and the mounting plate 200 also has a first optical hole and a first screw hole 200c.

[0057] In order to facilitate the operator or disassembly tool to disassemble the locking member 300, as Figure 8 As shown, in some embodiments of the present application, the locking member 300 further includes a screwing portion 320 away from the screw portion 310, and the screwing portion 320 is located outside the trough plate 100 or the mounting plate 200. The screwing portion 320 can be screwed by an operator or a disassembly tool to facilitate disassembly and assembly of the locking member 300.

[0058] As an example, the screwing portion 320 of the locking member 300 is located outside the trough plate 100 .

[0059] As another example, the screwing portion 320 of the locking member 300 is located outside the mounting plate 200 .

[0060] As another example, a portion of the screwing portion 320 of the locking member 300 is located outside the trough plate 100 , and another portion of the screwing portion 320 of the locking member 300 is located outside the mounting plate 200 .

[0061] In a specific embodiment, the outer circumference of the screwing portion 320 is provided with anti-slip grooves. The anti-slip grooves can increase the friction between the screwing portion 320 and the operator or the disassembly tool, preventing the operator or the disassembly tool from slipping, and facilitating the operator or the disassembly tool to screw the locking member 300.

[0062] The specific structure of the anti-slip pattern can be configured as needed, as long as it effectively prevents the operator or disassembly tools from slipping. For example, a plurality of vertical ridges can be provided at intervals along the circumference of the outer surface of the screwing portion 320 to form the anti-slip pattern. For another example, a mesh-like protrusion can also be provided on the outer surface of the screwing portion 320 to form the anti-slip pattern.

[0063] like Figure 3As shown, in some embodiments of the present application, the trough plate 100 comprises a bearing part 110 and a fixing part 120 connected together, the bearing part 110 is used to mount the release film assembly 20 and is staggered with the fixing part 120 in the axial direction of the zero-point positioning pin 310, so that the fixing part 120 is overlapped on the mounting plate 200, while the bearing part 110 is extended into the opening 200a of the mounting plate 200. In this way, the fixing part 120 can be used to fix the trough plate 100 on the mounting plate 200, and the bearing part 110 can be extended into the opening 200a of the mounting plate 200, so that the structure of the release film mounting mechanism 10 is more compact.

[0064] In another aspect, the present application also provides a 3D printer, which comprises a rack, a release film assembly 20 and a release film mounting mechanism 10 as described in any one of the above embodiments; the mounting plate 200 of the release film mounting mechanism 10 is arranged on the rack, and the release film assembly 20 is arranged on the trough plate of the release film mounting mechanism 10.

[0065] After the release film assembly 20 is assembled with the trough plate 100, the trough plate 100 and the mounting plate 200 are first positioned by the positioning member 400, and then locked by the locking member 300. In the present application, the zero-point positioning pin 410 is different from the cylindrical positioning pin used in the market, as shown in Figure 5 The positioning part 411 (i.e. the part of the zero-point positioning pin 410 used to be inserted into the positioning cylinder 420) of the zero-point positioning pin 410 is in the shape of a circular truncated cone, rather than a circular cylinder, and the positioning groove used to accommodate the positioning part 411 in the positioning cylinder 420 is also in the shape of a circular truncated cone, but the diameter size change trend of the two is opposite, the outer diameter of the positioning part 411 of the zero-point positioning pin 410 gradually decreases along the insertion direction of the zero-point positioning pin 410, and the groove width of the positioning groove of the positioning cylinder 420 gradually increases along the insertion direction of the zero-point positioning pin 410. Based on this point, when the zero-point positioning pin 410 is placed above the positioning cylinder 420, the diameter of the end of the positioning part 411 close to the positioning cylinder 420 is the smallest and is smaller than the groove width of the opening 200a of the positioning groove, which makes the opening 200a of the positioning groove have a large enough space to accommodate the positioning part 411 of the zero-point positioning pin 410, and the positioning part 411 of the zero-point positioning pin 410 is easier to align with the opening 200a of the positioning groove, so that it can smoothly enter the opening 200a of the positioning groove, and then enter the bottom of the positioning groove with the guidance of the inclined inner wall of the positioning groove. In the figure, Figure 5 The direction of the straight arrow in the figure is the insertion direction of the zero-point positioning pin 410.

[0066] In addition, since the plurality of positioning steel balls are uniformly arranged in the zero point positioning pin 410 along the circumference, the positioning steel balls apply pressure in a plurality of circumferentially equidistant directions, respectively, and the zero point positioning pin 410 and the positioning cylinder 420 with equal hardness are close to the center under the force balance. The centering effect makes the repeat accuracy of the positioning member 400 very high, and the positioning member 400 can be accurately positioned in the axis, and the positioning accuracy is ≤3 microns.

[0067] It can be seen that the 3D printer of the present application sets the positioning member 400 of the release film mounting mechanism 10 into the structure of the zero point positioning pin 410 cooperating with the positioning cylinder 420, which not only makes the positioning of the material groove plate 100 on the mounting plate 200 more accurate, and the positioning accuracy is ≤3 microns, but also ensures that the zero point positioning pin 410 can be aligned with the positioning cylinder 420, which can speed up the positioning process, and the zero point positioning pin 410 is not easy to tilt during positioning cooperation, and will not cause wear or deformation of the zero point positioning pin 410.

[0068] The technical features of the above-described embodiments can be combined arbitrarily, and to make the description concise, all possible combinations of the technical features in the above-described embodiments are not described, however, as long as the combinations of the technical features do not exist contradictory, it should be considered as the scope of the present application.

[0069] The above-described embodiments only express several embodiments of the present application, and the description is more specific and detailed, but it should not be understood as a limitation on the scope of the patent application. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are all within the scope of the present application. Therefore, the scope of protection of the patent of the present application should be subject to the appended claims.

Claims

1. A release film mounting mechanism characterized by comprising: include: Trough plate, used to install release film assembly; A mounting plate, arranged opposite to the trough plate; A locking member, used to lock the trough plate and the mounting plate; as well as The positioning member includes a zero point positioning pin and a positioning cylinder. The zero point positioning pin is inserted into the positioning cylinder. One of the zero point positioning pin and the positioning cylinder is arranged on the trough plate, and the other is arranged on the mounting plate.

2. The release film mounting mechanism according to claim 1, characterized by, The mounting plate has an opening, and the opening is used to expose the release film of the release film assembly; The locking member and the positioning member are both provided in plurality, and all the locking members and the positioning members are arranged around the opening.

3. The release film mounting mechanism of claim 2, wherein, There are two locking members, four positioning members and two of them are grouped together. The two groups of positioning members are respectively arranged on opposite sides of the opening, and each locking member is arranged between the two positioning members of the corresponding group.

4. The release film mounting mechanism of claim 1, wherein The zero point positioning pin is interference fit with the trough plate or the mounting plate, and / or the positioning cylinder is interference fit with the mounting plate or the trough plate.

5. The release film mounting mechanism of claim 1, wherein One end of the zero point positioning pin close to the positioning cylinder is provided with a disassembly groove.

6. The release film mounting mechanism according to any one of claims 1 to 5, wherein The locking member has a screw portion, and the screw portion passes through the trough plate and is screwed to the mounting plate, or the screw portion passes through the mounting plate and is screwed to the trough plate.

7. The release film mounting mechanism of claim 6, wherein The locking member further comprises a screwing portion away from the screw portion, and the screwing portion is located outside the trough plate or the mounting plate.

8. The release film mounting mechanism of claim 7, wherein, The outer peripheral surface of the screwing portion is provided with anti-slip grooves.

9. The release film mounting mechanism according to any one of claims 1 to 5, wherein The mounting plate has an opening; The trough plate includes a connected bearing portion and a fixing portion, the bearing portion is used to install the release film assembly and is staggered with the fixing portion in the axial direction of the zero point positioning pin so that the fixing portion overlaps the mounting plate and the bearing portion extends into the opening.

10. A 3D printer characterized by, It comprises a frame, a release film assembly and a release film installation mechanism according to any one of claims 1 to 9; The mounting plate of the release film mounting mechanism is arranged on the frame, and the release film assembly is arranged on the groove material plate of the release film mounting mechanism.

Images