Guide assembly and 3D printer

Abstract

The utility model discloses a guide assembly and a 3D printer. The guide assembly comprises a guide rod, a bearing, a connecting mechanism and a damping element, and the guide rod is sleeved with the bearing; the connecting mechanism is arranged on the bearing and is used for carrying a printing head of the 3D printer; the damping element wraps the bearing and is located between the bearing and the connecting mechanism. According to the guide assembly, the damping element wraps the bearing and is located between the bearing and the connecting mechanism, so that the damping element can absorb vibration generated when the bearing slides relative to the guide rod, vibration transmitted to the printing head through the connecting mechanism is reduced, and the stability of the printing head is improved; and the printing quality of the 3D printer is further improved.

Description

Technical Field

[0001] This application relates to the field of 3D printing technology, and more particularly to a guide component and a 3D printer. Background Technology

[0002] 3D printing, also known as additive manufacturing, is a technology that uses digital model files as a basis and employs adhesive materials to construct parts layer by layer. During the 3D printing process, the print head of the 3D printer can move in multiple directions to bring the extruded, molten adhesive material into contact with the printing surface. Therefore, the operational stability of the 3D printer's print head is a crucial factor in improving print quality. Utility Model Content

[0003] This application provides a guidance component and a 3D printer.

[0004] The guiding component of this application embodiment is used in a 3D printer, and the guiding component includes:

[0005] Guide rod;

[0006] The bearing is sleeved on the guide rod;

[0007] A connecting mechanism is disposed on the bearing, the connecting mechanism being used to mount the print head of the 3D printer;

[0008] The damping element is wrapped around the bearing and located between the bearing and the connecting mechanism.

[0009] In the guide assembly of this application embodiment, the damping element is wrapped around the bearing and located between the bearing and the connecting mechanism, so that the damping element can absorb the vibration generated when the bearing slides relative to the guide rod, thereby reducing the vibration transmitted to the print head through the connecting mechanism, improving the stability of the print head, and thus improving the printing quality of the 3D printer.

[0010] In some embodiments, the number of damping elements on each bearing is two, the two damping elements are spaced apart and located on opposite sides of the bearing axially.

[0011] In some embodiments, the guide assembly further includes a sleeve that at least partially encloses the damping element, and the sleeve is connected to the connecting mechanism.

[0012] In some embodiments, the connecting mechanism includes a slider and a guide rail connected to the slider. The slider has a mounting hole, and the sleeve is fitted into the mounting hole. The guide rail is used to mount the print head, and the length direction of the guide rail intersects the axial direction of the guide rod, which passes through the mounting hole.

[0013] In some embodiments, the sleeve is interference-fitted with the mounting hole, which is a hole with a circumferential opening facing the guide rail and penetrating one end of the slider along the depth direction of the mounting hole, and the sleeve covers the hole wall of the mounting hole.

[0014] In some embodiments, a stop is provided at the first orifice edge of the mounting hole in the axial direction, and the first end of the sleeve in the axial direction abuts against the stop.

[0015] In some embodiments, the connecting mechanism includes a limiting member detachably disposed on the slider, the limiting member being disposed at the edge of the second orifice in the axial direction of the mounting hole and abutting against the second end in the axial direction of the sleeve.

[0016] In some embodiments, the print head is slidable along the length of the guide rail, and there are two guide rods and two sliders. The two guide rods are arranged in parallel, and the sliders are arranged on the corresponding guide rods. The guide rail is mounted on the two sliders.

[0017] In some embodiments, the sleeve is provided with a grounding element, which is located on the side of the sleeve away from the guide rail, and the grounding element is electrically connected to the guide rail and the bearing.

[0018] In some embodiments, the slider includes a body portion and a protrusion portion. The body portion has the mounting hole formed therein. The protrusion portion protrudes from the body portion and includes a side surface and an end face connected to the side surface. The side surface is perpendicular to the axial direction of the guide rod. The protrusion portion is used to connect with the guide rail. The grounding member is disposed on the protrusion portion.

[0019] In some embodiments, the grounding member includes a sheet-like portion and a bent portion connected to the sheet-like portion, the sheet-like portion being connected to the sleeve, the sheet-like portion being fitted to the side surface, and the sleeve being in conductive contact with the bearing.

[0020] In some embodiments, the damping element is a rubber component.

[0021] In some embodiments, the sleeve is a multi-segment bent metal plate or an arc-shaped metal plate.

[0022] A 3D printer comprising:

[0023] Print head; and

[0024] In any of the above embodiments, the guide assembly has the printhead mounted on the connection mechanism.

[0025] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0026] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, wherein:

[0027] Figure 1 This is a partial structural schematic diagram of the 3D printer according to an embodiment of this application;

[0028] Figure 2 This is a partial perspective view of the guide component according to an embodiment of this application;

[0029] Figure 3 This is another perspective view of the guide component in the embodiments of this application;

[0030] Figure 4 This is a partially exploded schematic diagram of the guide component according to an embodiment of this application;

[0031] Figure 5 This is a further perspective view of the guide component according to an embodiment of this application;

[0032] Figure 6 yes Figure 1 An enlarged schematic diagram of part A;

[0033] Figure 7 yes Figure 2 An enlarged schematic diagram of part B;

[0034] Figure 8 This is a partial structural schematic diagram of the guide component according to an embodiment of this application.

[0035] Explanation of reference numerals in the attached figures:

[0036] 1000 - 3D printer; 100 - Guide assembly; 10 - Guide rod; 20 - Bearing; 30 - Connecting mechanism; 31 - Sliding part; 311 - Mounting hole; 312 - Opening; 313 - First opening; 314 - Second opening; 315 - Body; 316 - Protrusion; 317 - Side; 318 - End face; 32 - Guide rail; 33 - Stop; 34 - Limiting part; 40 - Shock absorption element; 50 - Sleeve; 51 - Notch; 60 - Grounding part; 61 - Sheet-like part; 62 - Bending part; 200 - Print head. Detailed Implementation

[0037] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0038] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0039] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0040] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0041] The following disclosure provides many different embodiments or examples for implementing different structures of this application. To simplify the disclosure, specific examples of components and arrangements are described below. Of course, these are merely examples and are not intended to limit the scope of this application. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, various specific examples of processes and materials are provided in this application, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0042] Please see Figure 1 The guide component 100 of this application embodiment is used in the 3D printer 1000, or in other words, the 3D printer 1000 includes the guide component 100. The 3D printer 1000 also includes a print head 200, which is mounted on the guide component 100.

[0043] Specifically, the guide assembly 100 carries the print head 200 and guides the print head 200 to move in different directions, enabling the print head 200 to print at different positions. The print head 200 is also called a tool head, and the print head 200 can be mounted on the guide assembly 100 by means of sliding connection or other methods.

[0044] Please see Figures 1-4 In some embodiments, the guide assembly 100 includes a guide rod 10, a bearing 20, a connecting mechanism 30, and a damping element 40. The bearing 20 is sleeved on the guide rod 10. The connecting mechanism 30 is disposed on the bearing 20 and is used to mount the print head 200 of the 3D printer 1000. The damping element 40 is wrapped around the bearing 20 and is located between the bearing 20 and the connecting mechanism 30.

[0045] In the guide assembly 100 of this application embodiment, the damping element 40 is wrapped around the bearing 20 and located between the bearing 20 and the connecting mechanism 30, so that the damping element 40 can absorb the vibration generated when the bearing 20 slides relative to the guide rod 10, thereby reducing the vibration transmitted to the print head 200 through the connecting mechanism 30, improving the stability of the print head 200, and thus improving the printing quality of the 3D printer 1000.

[0046] Specifically, the guide rod 10 can be an optical shaft, and it can be made of materials such as metal to improve its strength and reduce deformation. The bearing 20 can be a sliding bearing, which is sleeved on the guide rod 10 and can slide relative to it. Because the friction between the bearing 20 and the guide rod 10 is low, the connecting mechanism 30 moves more smoothly.

[0047] The connecting mechanism 30 is indirectly connected to the bearing 20. The bearing 20 can drive the connecting mechanism 30 to move synchronously through the shock-absorbing element 40, so that the print head 200 can move to achieve printing at different positions.

[0048] The damping element 40 can be made of elastic materials such as rubber. In some embodiments, the damping element 40 can be a rubber component. Rubber components have high elasticity and can effectively absorb the vibrations generated by the bearing 20 during sliding. The damping element 40 can be a closed ring or a non-closed ring. Alternatively, the damping element 40 can completely or partially enclose the bearing 20 along its circumference.

[0049] like Figure 5 As shown, in some embodiments, each bearing 20 has two damping elements 40, which are spaced apart and located on opposite sides of the bearing 20 in the axial direction.

[0050] In this way, the two damping elements 40 are spaced apart, which can avoid mutual interference between the two damping elements 40, thereby absorbing the vibration generated at different positions of the bearing 20, improving the vibration absorption capacity of the damping element 40, and thus reducing the vibration of the print head 200.

[0051] Specifically, each bearing 20 has two damping elements 40 that wrap around the two axial ends of the bearing 20, or in other words, each end of the bearing 20 is provided with a damping element 40.

[0052] Please see Figures 1-4 In some embodiments, the guide assembly 100 further includes a sleeve 50, which at least partially encloses the damping element 40 and is connected to the connecting mechanism 30. Thus, since the damping element 40 has high friction and is not easily connected to the connecting mechanism 30, the sleeve 50 at least partially encloses the damping element 40, allowing the damping element 40 to be indirectly connected to the connecting mechanism 30.

[0053] It is understood that the sleeve 50 is cylindrical, and it can either enclose a portion of the damping element 40 or completely enclose it. The sleeve 50 can tighten the damping element 40, thus fixing the sleeve 50 to the damping element 40. In addition, the sleeve 50 can also securely wrap the damping element 40 around the bearing 20, preventing the damping element 40 from loosening.

[0054] Thus, the sleeve 50, the shock-absorbing element 40, and the bearing 20 form a whole, which can move relative to the guide rod 10. Driven by the sleeve 50, the connecting mechanism 30, which carries the print head 200, can also move relative to the guide rod 10.

[0055] In one example, the sleeve 50 first wraps around the shock-absorbing element 40 and provides a pre-compression to the shock-absorbing element 40, so that the sleeve 50, the shock-absorbing element 40 and the bearing 20 form a component, which is then connected to the connecting mechanism 30. Since the sleeve 50, the shock-absorbing element 40 and the bearing 20 form the first component, and the connecting mechanism 30 serves as the second component, the 3D printer 1000 can be formed by assembling multiple components, which facilitates the assembly of the 3D printer 1000.

[0056] Please see Figures 1-3 In some embodiments, the connecting mechanism 30 includes a slider 31 and a guide rail 32 connected to the slider 31. The slider 31 is provided with a mounting hole 311, and the sleeve 50 is embedded in the mounting hole 311. The guide rail 32 is used to mount the print head 200. The length direction of the guide rail 32 intersects the axial direction of the guide rod 10, and the guide rod 10 passes through the mounting hole 311.

[0057] Thus, the sleeve 50 is embedded in the mounting hole 311 of the slider 31, making the sleeve 50 and the slider 31 structurally compact. The bearing 20 and the slider 31 can move synchronously along the axial direction of the guide rod 10, thereby driving the print head 200 to move.

[0058] Specifically, the slider 31 is a component that can move relative to the guide rod 10. The mounting hole 311 on the guide rod 10 is a through hole, allowing the guide rod 10 to pass through the mounting hole 311. The guide rail 32 can be fixedly connected to the slider 31 by means of screws or the like, so that the guide rail 32 can move together with the slider 31 relative to the guide rod 10, thereby driving the print head 200 to move.

[0059] The printhead 200 can be slidably mounted on the guide rail 32. Thus, driven by the slider 31, the printhead 200 can move along the axial direction of the guide rod 10 or along the length direction of the guide rail 32, achieving movement in both directions. In one example, the length direction of the guide rail 32 can be perpendicular to the axial direction of the guide rod 10.

[0060] Please see Figures 2-4 In some embodiments, the sleeve 50 is interference-fitted with the mounting hole 311, which is a hole with a circumferential opening 312 facing the guide rail 32 and penetrating one end of the slider 31 along the depth direction of the mounting hole 311. The sleeve 50 covers the hole wall of the mounting hole 311.

[0061] Thus, the installation method of sleeve 50 and sliding member 31 is simple. In addition, the mounting hole 311 has an opening 312, which allows the sliding member 31 to undergo elastic deformation, which is beneficial for installing sleeve 50 into mounting hole 311.

[0062] Specifically, during the installation of sleeve 50, a large axial pressure can be applied to sleeve 50 to insert it into mounting hole 311 from one axial end. Sleeve 50 covers the wall of mounting hole 311, resulting in a larger contact area between sleeve 50 and the wall of mounting hole 311. This facilitates a stable connection between sleeve 50 and mounting hole 311 and increases the coverage area of ​​damping element 40, further enhancing the connection. By designing the opening 312 of sliding member 31 to cooperate with sleeve 50, installation is facilitated while ensuring a stable connection.

[0063] Please see Figure 1 , Figure 2 and Figure 6 In some embodiments, a stop 33 is provided at the edge of the first orifice 313 in the axial direction of the mounting hole 311, and the first end of the sleeve 50 in the axial direction abuts against the stop 33.

[0064] Thus, the stop portion 33 can restrict the axial position of the sleeve 50, reduce the risk of the sleeve 50 moving in the direction of its first end, and make the sleeve 50 stably connected to the sliding member 31.

[0065] Specifically, the stop portion 33 can be ring-shaped, sheet-shaped, or other shapes. For example, when there is only one stop portion 33, it can be ring-shaped. When the stop portion 33 is sheet-shaped, there can be multiple stop portions 33, which are arranged at intervals along the circumference of the mounting hole 311. The stop portion 33 and the slider 31 can be an integral structure, which can reduce the number of parts in the 3D printer 1000 and improve the assembly efficiency of the 3D printer 1000. For example, the stop portion 33 and the slider 31 can be formed by injection molding.

[0066] Please see Figure 2 , Figure 3 and Figure 7 In some embodiments, the connecting mechanism 30 includes a limiting member 34 detachably disposed on the sliding member 31. The limiting member 34 is disposed at the edge of the second orifice 314 in the axial direction of the mounting hole 311 and abuts against the second end in the axial direction of the sleeve 50.

[0067] Thus, the limiting member 34 can restrict the axial position of the sleeve 50 at the second end of the sleeve 50, reducing the risk of the sleeve 50 moving in the direction of its second end, and making the bushing and the sliding part stably connected.

[0068] Specifically, the limiting member 34 can be a pressing plate, and the limiting member 34 can be fastened to the sliding member 31 by means of screws or the like, and press against the second end of the sleeve 50 in the axial direction.

[0069] like Figure 1As shown, in some embodiments, the print head 200 can slide along the length of the guide rail 32. There are two guide rods 10 and two sliders 31. The two guide rods 10 are arranged in parallel, and the sliders 31 are arranged on the corresponding guide rods 10. The guide rail 32 is mounted on the two sliders 31.

[0070] Thus, the two guide rods 10 jointly support the guide rail 32, making the force on the guide rail 32 stable and the movement process smoother, which is conducive to the stable movement of the print head 200 and improves the printing quality of the 3D printer 1000.

[0071] It should be noted that the two sliders 31 can be symmetrical, or in other words, the two sliders 31 are symmetrically arranged about a plane perpendicular to the length direction of the guide rail 32. The two ends of the guide rail 32 can be fixed to the corresponding sliders 31 respectively.

[0072] Please refer to it again. Figure 3 and Figure 4 In some embodiments, the sleeve 50 is provided with a grounding element 60, which is located on the side of the sleeve 50 away from the guide rail 32, and the grounding element 60 is electrically connected to the guide rail 32 and the bearing 20.

[0073] Thus, the grounding component 60 can guide static electricity and current near the printhead 200 to the ground, reducing the influence of the electric field on the printhead 200; in addition, the grounding component 60 can also provide a grounding path for the circuits and electrical components inside the printhead 200.

[0074] Specifically, the grounding component 60 can be made of conductive materials such as metal. The grounding component 60 can contact the guide rail 32 to achieve a conductive connection between the grounding component 60 and the guide rail 32. The grounding component 60 can also achieve a conductive connection with the bearing 20 through the sleeve 50.

[0075] Please see Figure 2 , Figure 3 and Figure 8 In some embodiments, the slider 31 includes a body portion 315 and a protrusion 316. The body portion 315 has a mounting hole 311. The protrusion 316 protrudes from the body portion 315 and includes a side surface 317 and an end face 318 connected to the side surface 317. The side surface 317 is perpendicular to the axial direction of the guide rod 10. The protrusion 316 is used to connect with the guide rail 32. A grounding member 60 is disposed on the protrusion 316.

[0076] Thus, the protrusion 316 can provide support for the grounding member 60, making the position of the grounding member 60 stable, thereby making the conductivity between the grounding member 60 and the guide rail 32 more stable.

[0077] Please see Figure 2 , Figure 3 and Figure 8 In some embodiments, the grounding member 60 includes a sheet-like portion 61 and a bent portion 62 connected to the sheet-like portion 61. The sheet-like portion 61 is connected to the sleeve 50, and the sheet-like portion 61 is attached to the side surface 317. The sleeve 50 is in conductive contact with the bearing 20.

[0078] Thus, the sheet-like portion 61 fits against the side surface 317, resulting in a larger contact area between the grounding member 60 and the sliding member 31, thus ensuring a stable connection between them. Specifically, the bent portion 62 can hook onto the end face 318 and contact the guide rail 32, thereby maintaining the connection between the guide rail 32 and the grounding member 60 at the end face 318. In some embodiments, the sleeve 50 can achieve partial contact with the bearing 20 by means of partial bending.

[0079] In some embodiments, the sleeve 50 is a multi-segment bent metal plate or an arc-shaped metal plate. Thus, the sleeve 50 is a metal plate, giving it sufficient hardness and rigidity, and also providing elasticity, which is beneficial for encasing the damping element 40 and connecting it to the connecting mechanism 30. In one example, when the sleeve 50 is a multi-segment bent metal plate, it can be manufactured by a bending process. When the sleeve 50 is a multi-segment bent metal plate, after the sleeve 50 mates with the mounting hole 311, the structure of the sleeve 50 can restrict the sleeve 50 from rotating circumferentially relative to the sliding member 31.

[0080] like Figure 4 As shown, in some embodiments, the sleeve 50 has a notch 51 that extends through both ends of the sleeve 50 along its axial direction. Thus, the notch 51 allows the sleeve 50 to enclose the damping element 40 in a clamping manner, facilitating the assembly of the sleeve 50 and the damping element 40 together.

[0081] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with the described embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0082] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A guide assembly for a 3D printer, characterized by, The guide assembly comprises: a guide rod; a bearing sleeved on the guide rod; a connecting mechanism arranged on the bearing, the connecting mechanism being used for carrying a print head of the 3D printer; a damping element wrapped on the bearing and located between the bearing and the connecting mechanism.

2. The guide assembly of claim 1, wherein, The number of the damping elements on each bearing is two, the two damping elements are arranged in a spaced manner and are located on two sides of the bearing in an axial direction.

3. The guide assembly of claim 1, wherein, The guide assembly further comprises a sleeve, the sleeve wrapping at least part of the damping element, the sleeve being connected with the connecting mechanism.

4. The guide assembly of claim 3, wherein, The connecting mechanism comprises a sliding piece and a guide rail connected with the sliding piece, the sliding piece is provided with a mounting hole, the sleeve is embedded in the mounting hole, the guide rail is used for carrying the print head, the length direction of the guide rail intersects with the axial direction of the guide rod, and the guide rod is arranged in the mounting hole.

5. The guide assembly of claim 4, wherein, The sleeve is in interference fit with the mounting hole, the mounting hole is a hole with an opening in a circumferential direction, the opening is directed towards the guide rail and penetrates through one end of the sliding piece along the depth direction of the mounting hole, and the sleeve covers the hole wall of the mounting hole.

6. The guide assembly of claim 4, wherein, A stopper is arranged at a first hole opening edge in the axial direction of the mounting hole, and a first end in the axial direction of the sleeve abuts against the stopper.

7. The guide assembly of claim 6, wherein, The connecting mechanism comprises a limiting piece arranged on the sliding piece in a detachable manner, the limiting piece is arranged at a second hole opening edge in the axial direction of the mounting hole and abuts against a second end in the axial direction of the sleeve.

8. The guide assembly of claim 4, wherein, The print head can slide along the length direction of the guide rail, the number of the guide rods and the sliding pieces is both two, the two guide rods are arranged in parallel, the sliding pieces are arranged on the corresponding guide rods, and the guide rail is arranged on the two sliding pieces.

9. The guide assembly of claim 4, wherein, A grounding piece is arranged on the sleeve, the grounding piece is located on a side of the sleeve away from the guide rail, and the grounding piece is in conductive connection with the guide rail and the bearing.

10. The guide assembly of claim 9, wherein, The sliding piece comprises a body part and a protruding part, the body part is formed with the mounting hole, the protruding part protrudes from the body part, the protruding part comprises a side surface and an end surface connected with the side surface, the side surface is perpendicular to the axial direction of the guide rod, the protruding part is used for connecting with the guide rail, and the grounding piece is arranged on the protruding part.

11. The guide assembly of claim 10, wherein, The grounding piece comprises a sheet part and a bent part connected with the sheet part, the sheet part is connected with the sleeve, the sheet part is attached to the side surface, and the sleeve is in conductive contact with the bearing.

12. The guide assembly of claim 3, wherein, The sleeve is a multi-segment bent metal plate or a circular arc metal plate.

13. The guide assembly of claim 1, wherein, The damping element is a rubber element.

14. A 3D printer characterized by, Comprises: a print head; and The guide assembly of any one of claims 1-13, the print head being carried on the connecting mechanism.

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