A mobile device and 3D printer thereof

Abstract

The present application relates to a mobile device and a 3D printer thereof, which comprises a horizontal bracket and two vertical brackets arranged at intervals, wherein the horizontal bracket moves up and down along the vertical brackets through a moving mechanism, wherein the moving mechanism comprises: a first moving member, which is arranged on the horizontal bracket and configured to be able to abut against and move up and down along one of the vertical brackets; a second moving member, which is arranged on the horizontal bracket and configured to be able to abut against and move up and down along the other vertical bracket; the first moving member and / or the second moving member clamps the moving mechanism and the two vertical brackets by applying force to the abutting vertical brackets. The present application has the effect of improving the stability of the horizontal bracket moving up and down.

Description

Technical Field

[0001] The present application relates to the field of printing equipment, and in particular to a mobile device and a 3D printer thereof. Background Art

[0002] 3D printing is a type of rapid prototyping technology. It is a technology that uses digital model files as the basis, uses powdered metal or plastic and other bondable materials to construct objects by printing layer by layer. With the gradual development of 3D printers, the performance and precision requirements of 3D printed products are getting higher and higher, so the stability requirements of the transmission mechanism of 3D printers are relatively high.

[0003] At present, the moving mechanism of the traditional 3D printer has two sets of rollers distributed on both sides of the Z-axis direction, and the two sets of rollers are provided with three rollers respectively. The three rollers of the two sets are respectively distributed on both sides of the two vertical brackets, and are clamped on the vertical brackets by the three rollers. The two sets of rollers are respectively installed at both ends of the horizontal brackets in the x-axis direction, and the two sets of rollers move up and down along the two vertical brackets, thereby driving the print head installed on the horizontal bracket to move up and down.

[0004] With respect to the above-mentioned prior art, the inventors have found the following defects: the tightness of the clamping between the two groups of rollers of the horizontal bracket and the two vertical brackets is likely to be inconsistent, which may easily lead to unstable movement of the horizontal bracket. Summary of the invention

[0005] In order to improve the stability of the up and down movement of the lateral bracket, in a first aspect, the present application provides a moving device.

[0006] The mobile device provided in this application adopts the following technical solution:

[0007] A moving device comprises a transverse support and two vertical supports arranged at intervals, wherein the transverse support moves up and down along the vertical supports through a moving mechanism, and the moving mechanism comprises:

[0008] A first moving member, the first moving member is disposed on the horizontal bracket and is configured to be able to abut against and move up and down along one of the vertical brackets;

[0009] A second moving member, the second moving member is disposed on the horizontal bracket and is configured to abut against and move up and down along another vertical bracket;

[0010] The first moving member and / or the second moving member clamps the moving mechanism and the two vertical brackets by applying force to the abutting vertical brackets.

[0011] By adopting the above technical solution, the first movable member and the second movable member arranged on the transverse bracket respectively abut against the two vertical brackets and can move up and down along the vertical brackets. The first movable member and / or the second movable member applies force to the corresponding vertical brackets so that the first movable member and the second movable member respectively have the same abutting force as the two vertical brackets, thereby making the first movable member and the second movable member on the transverse bracket move up and down along the two vertical brackets consistent, thereby improving the stability of the up and down movement of the transverse bracket.

[0012] Preferably, the first movable member abuts against an end surface of one of the vertical brackets away from the other vertical bracket, so as to clamp the two vertical brackets together with the second movable member.

[0013] By adopting the above technical solution, the first movable member abuts against an end face of one of the vertical brackets away from the other vertical bracket, and the first movable member abuts against the other vertical bracket. The first movable member and / or the second movable member apply force to the corresponding vertical bracket, which can make the first movable member and the second movable member respectively have the same abutting force with the two vertical brackets, thereby making the first movable member and the second movable member on the transverse bracket move up and down along the two vertical brackets consistent, thereby improving the stability of the transverse bracket moving up and down.

[0014] Preferably, the second movable member abuts against an end surface of another vertical bracket away from the first movable member.

[0015] By adopting the above technical solution, the first movable member abuts against an end face of one of the vertical brackets close to the other vertical bracket, and the second movable member abuts against an end face of the other vertical bracket away from the first movable member. The first movable member and / or the second movable member apply force to the corresponding vertical bracket to clamp the first movable member and the second movable member on the two vertical brackets, so that the abutting pressure of the first movable member and the second movable member and the vertical brackets is consistent, so that the first movable member and the second movable member on the transverse bracket move up and down along the two vertical brackets in a consistent manner, thereby improving the stability of the up and down movement of the transverse bracket.

[0016] Preferably, the first movable member abuts against an end surface of one of the vertical brackets close to the other vertical bracket, so as to be clamped between the two vertical brackets together with the second movable member.

[0017] By adopting the above technical solution, the first movable member abuts against an end face of one of the vertical brackets close to the other vertical bracket, and the second movable member abuts against an end face of the other vertical bracket away from the first movable member. The first movable member and / or the second movable member apply force to the corresponding vertical bracket so that the first movable member and the second movable member respectively have the same abutting force with the two vertical brackets, thereby making the first movable member and the second movable member on the transverse bracket move up and down along the two vertical brackets consistent, thereby improving the stability of the up and down movement of the transverse bracket.

[0018] Preferably, the second movable member abuts against an end surface of another vertical bracket close to the first movable member.

[0019] By adopting the above technical solution, the first movable member abuts against an end face of one of the vertical brackets away from or close to the other vertical bracket, and the second movable member abuts against an end face of the other vertical bracket close to the first movable member. The first movable member and / or the second movable member apply force to the corresponding vertical bracket to make the first movable member and the second movable member respectively have the same abutting force with the two vertical brackets, thereby making the first movable member and the second movable member on the transverse bracket move up and down along the two vertical brackets consistent, thereby improving the stability of the up and down movement of the transverse bracket.

[0020] Preferably, the first movable member comprises at least one roller, and the first movable member abuts against the vertical bracket through the at least one roller;

[0021] The second movable member comprises at least two rollers, and the second movable member abuts against the vertical bracket through the at least two rollers;

[0022] At least one of the rollers and at least two of the rollers clamp the moving mechanism and the two vertical brackets in a facing or opposite manner.

[0023] By adopting the above technical solution, the rollers on the first movable member and the rollers on the second movable member respectively abut against the end faces of the two vertical brackets that are away from each other or the two opposite end faces, so that the rollers on the first movable member and the second movable member are clamped with the two vertical brackets, thereby ensuring the stability of the up and down movement of the first movable member and the second movable member on the transverse bracket along the two vertical brackets.

[0024] Preferably, the first movable member and the second movable member each include two rollers, and the two rollers are spaced apart in the vertical direction.

[0025] By adopting the above technical solution, four rollers arranged in a square are clamped with two vertical brackets, thereby improving the stability of the horizontal bracket moving up and down along the vertical bracket and reducing the number of installed rollers, thereby improving assembly efficiency and reducing costs.

[0026] Preferably, it also includes an adjustment component, which is arranged on the first movable member, the second movable member or the transverse bracket and is used to adjust the pressure between the roller and the vertical bracket in a manner that the roller approaches or moves away from the vertical bracket.

[0027] By adopting the above technical solution, the roller is prone to loosening or wearing after working for a period of time, which makes it easy for a gap to exist between the roller and the vertical bracket. The roller is adjusted to be close to the vertical bracket by adjusting the adjustment component, thereby adjusting the pressure between the roller and the vertical bracket, thereby adjusting the stability of the movement of the first movable member and the second movable member and the vertical bracket.

[0028] Preferably, the adjustment assembly is disposed on the first movable member and is operably movable to push the roller to move in the direction of the second movable member, so as to cooperate with the roller on the second movable member to clamp the vertical bracket.

[0029] By adopting the above technical solution, the roller on the first movable member is pushed toward the second movable member through the adjustment component, thereby synchronously adjusting the pressure of the roller on the second movable member and the vertical bracket, thereby facilitating the adjustment of the pressure of the roller on the first movable member and the second movable member and the two vertical brackets.

[0030] Preferably, the vertical bracket is provided with a track groove along the length direction, and the wheel surface of the roller and the track groove are abutted against each other and are rollingly connected.

[0031] By adopting the above technical solution, the track groove arranged on the vertical bracket moves in coordination with the roller, thereby improving the stability of the roller moving in the vertical direction.

[0032] In a second aspect, the present application provides a 3D printer.

[0033] The 3D printer provided in this application adopts the following technical solution:

[0034] A 3D printer comprises a printing head and a moving device, wherein the printing head is slidably connected to a transverse support.

[0035] By adopting the above technical solution, the first movable member and the second movable member arranged on the horizontal bracket respectively rest against the two vertical brackets and can move up and down along the vertical brackets. The first movable member and / or the second movable member applies force to the corresponding vertical bracket so that the first movable member and the second movable member can respectively have the same pressing force as the two vertical brackets, thereby making the first movable member and the second movable member on the horizontal bracket move up and down along the two vertical brackets consistent, thereby improving the stability of the horizontal bracket moving up and down, thereby improving the accuracy of the print head moving printing. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a front view of the mobile device in the first embodiment of the present application.

[0037] Figure 2 It is a schematic diagram of the three-dimensional structure of the mobile device in Example 1 of the present application.

[0038] Figure 3 It is a schematic diagram of the installation structure of the first movable member, the horizontal bracket and the vertical bracket in Example 1 of the present application.

[0039] Figure 4 It is a schematic diagram of the exploded structure of the roller and the adjustment assembly in Example 1 of the present application.

[0040] Figure 5 It is a schematic diagram of the installation structure of the roller and the adjustment assembly in the second embodiment of the present application.

[0041] Figure 6 yes Figure 5 Enlarged view of point A.

[0042] Figure 7 It is a schematic diagram of the installation structure of the print head and the mobile device in the embodiment of the present application.

[0043] Explanation of the accompanying drawings: 1. base; 11. motor; 12. screw; 2. vertical bracket; 21. track groove; 3. horizontal bracket; 31. first movable member; 32. second movable member; 4. horizontal profile; 5. connecting plate; 51. connecting hole; 61. roller; 62. mounting shaft; 63. limiting cylinder; 7. adjustment assembly; 71. eccentric sleeve; 711. screwing part; 72. fastening nut; 73. adjustment block; 731. guide block; 74. adjustment rod; 8. mounting plate; 81. adjustment hole; 811. guide groove; 9. print head. DETAILED DESCRIPTION

[0044] The following is combined with Figure 1-7 This application is described in further detail.

[0045] An embodiment of the present application discloses a mobile device.

[0046] Embodiment 1:

[0047] Reference Figure 1 The moving device includes a base 1, two vertical brackets 2 vertically spaced apart on the base 1, and a horizontal transverse bracket 3. The transverse bracket 3 moves up and down along the vertical bracket 2 through a moving mechanism. The moving mechanism includes a first moving member 31 and a second moving member 32. The first moving member 31 is fixedly arranged on the transverse bracket 3 and configured to be able to abut against and move up and down along one of the vertical brackets 2; the second moving member 32 is fixedly arranged on the transverse bracket 3 and configured to be able to abut against and move up and down along the other vertical bracket 2; the first moving member 31 clamps the moving mechanism and the two vertical brackets 2 by applying force to the abutting vertical bracket 2, or the second moving member 32 clamps the moving mechanism and the two vertical brackets 2 by applying force to the vertical bracket 2, or the first moving member 31 and the second moving member 32 both apply force to the corresponding vertical bracket 2 to clamp the moving mechanism and the two vertical brackets 2. The first movable member 31 and the second movable member 32 arranged on the transverse bracket 3 respectively abut against the two vertical brackets 2 and can move up and down along the vertical brackets 2. The first movable member 31 and / or the second movable member 32 apply force to the corresponding vertical bracket 2 to make the first movable member 31 and the second movable member 32 respectively have the same abutting force with the two vertical brackets 2, thereby making the first movable member 31 and the second movable member 32 on the transverse bracket 3 move up and down along the two vertical brackets 2 consistent, thereby improving the stability of the up and down movement of the transverse bracket 3.

[0048] Preferably, in this embodiment, the first movable member 31 abuts against an end face of one of the vertical brackets 2 away from the other vertical bracket 2, and the second movable member 32 abuts against an end face of the other vertical bracket 2 away from the first movable member 31, and the two vertical brackets 2 are clamped by the second movable member 32. In other embodiments, the first movable member 31 abuts against an end face of one of the vertical brackets 2 away from the other vertical bracket 2, and the second movable member 32 abuts against an end face of the other vertical bracket 2 close to the first movable member 31; or, the first movable member 31 abuts against an end face of one of the vertical brackets 2 close to the other vertical bracket 2, and the second movable member 32 abuts against an end face of the other vertical bracket 2 close to or away from the first movable member 31, so as to be clamped between the two vertical brackets 2 with the second movable member 32.

[0049] Reference Figure 2 The base 1 is arranged in an I-shape, the lower ends of the two vertical brackets 2 are fixedly connected to the base 1 by bolts, and the upper ends of the two vertical brackets 2 are fixedly connected with a transverse profile 4 by bolts, and the stability of the two vertical brackets 2 is ensured by the transverse profile 4. In this embodiment, the vertical brackets 2, the transverse brackets 3, the base 1 and the transverse profile 4 are all made of guide rail profiles made of aluminum alloy.

[0050] Reference Figure 1 and Figure 2 , the first moving member 31 includes at least one roller 61, and the second moving member 32 includes at least two rollers 61. The first moving member 31 abuts against one of the vertical brackets 2 through at least one roller 61, and the second moving member 32 abuts against the other vertical bracket 2 through at least two rollers 61; at least one roller 61 on the first moving member 31 and at least two rollers 61 on the second moving member 32 clamp the moving mechanism with the two vertical brackets 2 in a facing or opposite manner. The rollers 61 on the first moving member 31 and the rollers 61 on the second moving member 32 respectively abut against the end faces of the two vertical brackets 2 that are away from each other or two opposite end faces, so that the rollers 61 on the first moving member 31 and the rollers 61 on the second moving member 32 are clamped with the two vertical brackets 2, thereby ensuring the stability of the first moving member 31 and the second moving member 32 on the transverse bracket 3 moving up and down along the two vertical brackets 2. In other embodiments, the first moving member 31 may include at least two rollers 61, and the second moving member 32 may include at least one roller 61.

[0051] Preferably, the first movable member 31 and the second movable member 32 in this embodiment each include two rollers 61, which are arranged at intervals in the vertical direction, and the two rollers 61 on the first movable member 31 abut against one end face of one vertical bracket 2 away from the other vertical bracket 2, and the two rollers 61 of the second movable member 32 abut against one end face of the other vertical bracket 2 away from the first movable member 31. The four rollers 61 arranged in a square are clamped on the two vertical brackets 2, thereby improving the stability of the horizontal bracket 3 moving up and down along the vertical bracket 2, and reducing the number of rollers 61 installed, thereby improving assembly efficiency and reducing costs.

[0052] Specifically, the first movable member 31 and the second movable member 32 also include a connecting plate 5, and the connecting plate 5 is vertically fixed on the side walls at both ends of the horizontal bracket 3 by bolts. The two rollers 61 on the first movable member 31 and the second movable member 32 are installed on the side wall of the connecting plate 5 through the mounting shaft 62. The mounting shaft 62 in this embodiment is a bolt, and the bolt is threaded at one end away from the bolt cap, and the remaining part is a polished rod, and the roller 61 is coaxially sleeved on the polished rod part of the bolt. A mounting plate 8 is arranged at a relative position of one of the connecting plates 5, and one of the vertical brackets 2 is located between the connecting plate 5 and the mounting plate 8. The connecting plate 5 and the mounting plate 8 are fixedly connected by bolts and nuts. Three bolts are arranged to fix the mounting plate 8 and the connecting plate 5, and the three bolts are arranged in a triangular distribution. The polished rod part of the bolt is sleeved with a limiting cylinder 63, and both sides of the bolt on which the roller 61 is installed are sleeved with a limiting cylinder 63, and another bolt is sleeved with a limiting cylinder 63, and the limiting cylinder 63 abuts against the opposite side walls of the connecting plate 5 and the mounting plate 8.

[0053] Reference Figure 3 The vertical bracket 2 is provided with a track groove 21 along the length direction, the groove opening of the track groove 21 is open outward, and the wheel surfaces on both sides of the roller 61 are in contact with the open groove wall of the track groove 21. Thus, the roller 61 can move smoothly, and the degree of tightness between the roller 61 and the vertical bracket 2 can be adjusted conveniently.

[0054] Reference Figure 4 After the roller 61 has worked for a period of time, it is easy to become loose or worn, so that there is a gap between the roller 61 and the vertical bracket 2. In order to adjust the pressure between the roller 61 and the vertical bracket 2, the present application further includes an adjustment component 7, which is used to adjust the pressure between the roller 61 and the vertical bracket 2 by moving the roller 61 closer to or away from the vertical bracket 2. The adjustment component 7 can be arranged on the first movable member 31, the second movable member 32 or the horizontal bracket 3.

[0055] In this embodiment, the adjustment assembly 7 is arranged on the first movable member 31 and can be operated to move so as to push the roller 61 to move in the direction of the second movable member 32, so as to cooperate with the roller 61 on the second movable member 32 to clamp the vertical bracket 2. Specifically, the adjustment assembly 7 includes an eccentric sleeve 71 and a fastening nut 72. The eccentric sleeve 71 is arranged as a cylindrical tube, and the shaft hole of the eccentric sleeve 71 is eccentrically arranged. The eccentric sleeve 71 is sleeved on the installation shaft 62, and the connecting plate 5 is provided with a connecting hole 51, and one end of the eccentric sleeve 71 is rotatably connected to the connecting plate 5 through the connecting hole 51. The fastening nut 72 is threadedly connected to the end of the installation shaft 62, and the roller 61 is located between the eccentric sleeve 71 and the fastening nut 72. The cap of the installation shaft 62 abuts against the side wall of the connecting plate 5 away from the eccentric sleeve 71. The eccentric sleeve 71 is protruded with a screwing portion 711 with a hexagonal cross-section and the side wall of the screwing portion 711 abuts against the side wall of the connecting plate 5. The eccentric sleeve 71 and the roller 61 are clamped and fixed between the connecting plate 5 and the fastening nut 72 through the cap of the installation shaft 62 and the fastening nut 72. Since the eccentric sleeve 71 is rotatably connected to the connecting plate 5 through the connecting hole 51, the shaft hole is offset by rotating the eccentric sleeve 71, thereby causing the installation shaft 62 to offset, thereby facilitating the adjustment of the tightness between the roller 61 and the vertical bracket 2.

[0056] The implementation principle of a mobile device in the embodiment of the present application is as follows: the first mobile member 31 and the second mobile member 32 provided on the transverse bracket 3 are respectively pressed against the two vertical brackets 2 and can move up and down along the vertical brackets 2. The first mobile member 31 and / or the second mobile member 32 apply force to the corresponding vertical bracket 2 to make the first mobile member 31 and the second mobile member 32 respectively press against the two vertical brackets 2, so that the first mobile member 31 and the second mobile member 32 on the transverse bracket 3 move up and down along the two vertical brackets 2 in a consistent manner, thereby improving the stability of the transverse bracket 3 moving up and down. In addition, the rollers 61 on the first mobile member 31 and the second mobile member 32 are distributed on the end surfaces of the two vertical brackets 2 that are away from each other. The clamping degree between the rollers 61 on the first mobile member 31 and the second mobile member 32 and the two vertical brackets 2 can be synchronously achieved through the adjustment component 7, so as to facilitate the adjustment of the tightness of the rollers 61 and the vertical brackets 2.

[0057] Embodiment 2:

[0058] Reference Figure 5 and Figure 6, which is different from the first embodiment, is that the adjustment assembly 7 includes an adjustment block 73 and an adjustment rod 74, a long strip-shaped adjustment hole 81 is provided on the side wall of the connecting plate 5 in the direction close to the vertical bracket 2, the adjustment block 73 is slidably provided in the adjustment hole 81 along the length direction of the adjustment hole 81, the adjustment rod 74 is horizontally rotated and connected to the adjustment hole 81 along the length direction and extends out of the outside of the connecting plate 5, the adjustment rod 74 partly located in the adjustment hole 81 is threaded and threadedly connected to the adjustment block 73, and the adjustment block 73 is fixedly connected to one end of the mounting shaft 62. The upper and lower side walls of the adjustment hole 81 are provided with guide grooves 811 along the length direction, and the upper and lower surfaces of the adjustment block 73 are fixedly provided with guide blocks 731, which are slidably connected to the guide grooves 811, and the position of the adjustment block 73 is adjusted by rotating the adjustment rod 74, so as to facilitate the adjustment of the tightness of the roller 61 and the vertical bracket 2.

[0059] The embodiment of the present application also discloses a 3D printer.

[0060] Reference Figure 7 The 3D printer includes a print head 9 and the above-mentioned moving device. The print head 9 is horizontally slidably connected to the horizontal bracket 3 through a roller 61 group. The roller 61 group is composed of three rollers 61 distributed in a triangle. A motor 11 is installed on the base. A vertical screw rod 12 is coaxially fixed to the output shaft of the motor 11. The upper end of the screw rod 12 is a movable end. The screw rod 12 is threadedly connected to the mounting plate 8. The motor 11 and the screw rod 12 drive the horizontal bracket 3 to move up and down along the vertical bracket 2.

[0061] The implementation principle of a moving device in an embodiment of the present application is as follows: the first moving member 31 and the second moving member 32 arranged on the horizontal bracket 3 are respectively abutted against the two vertical brackets 2 and can move up and down along the vertical brackets 2. The first moving member 31 and / or the second moving member 32 apply force to the corresponding vertical bracket 2 to make the first moving member 31 and the second moving member 32 respectively have the same abutting force with the two vertical brackets 2, thereby making the first moving member 31 and the second moving member 32 on the horizontal bracket 3 move up and down along the two vertical brackets 2 consistent, thereby improving the stability of the up and down movement of the horizontal bracket 3, thereby improving the accuracy of the print head 9 moving and printing.

[0062] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A moving device, comprising a transverse support (3) and two vertical supports (2) arranged at intervals, wherein the transverse support (3) moves up and down along the vertical supports (2) through a moving mechanism, characterized in that: The moving mechanism comprises: A first movable member (31), the first movable member (31) being arranged on the transverse bracket (3) and being configured to be able to abut against and move up and down along one of the vertical brackets (2); A second movable member (32), the second movable member (32) being arranged on the transverse bracket (3) and configured to be able to abut against and move up and down along another vertical bracket (2); The first movable member (31) and the second movable member (32) are respectively pressed against the end faces of the two vertical brackets (2) that are away from each other or two opposite end faces, so that the first movable member (31) and the second movable member (32) are clamped with the two vertical brackets (2); The invention also comprises an adjusting component (7), which is arranged on the first movable member (31), the second movable member (32) or the transverse bracket (3) and is used to adjust the pressure between the first movable member (31), the second movable member (32) and the vertical bracket (2) in a manner that the first movable member (31) or the second movable member (32) is moved closer to or farther away from the vertical bracket (2).

2. A mobile device according to claim 1, characterized in that: The first movable member (31) abuts against an end surface of one of the vertical brackets (2) away from the other vertical bracket (2) to clamp the two vertical brackets (2) together with the second movable member (32).

3. A mobile device according to claim 2, characterized in that: The second movable member (32) abuts against an end surface of another vertical bracket (2) away from the first movable member (31).

4. A mobile device according to claim 1, characterized in that: The first movable member (31) abuts against an end surface of one of the vertical brackets (2) close to the other vertical bracket (2) so as to be clamped between the two vertical brackets (2) together with the second movable member (32).

5. A mobile device according to claim 4, characterized in that: The second movable member (32) abuts against an end surface of another vertical bracket (2) close to the first movable member (31).

6. A mobile device according to any one of claims 1 to 5, characterized in that: The first movable member (31) comprises at least one roller (61), and the first movable member (31) abuts against the vertical support (2) via the at least one roller (61); The second movable member (32) comprises at least two rollers (61), and the second movable member (32) abuts against the vertical bracket (2) via the at least two rollers (61); At least one of the rollers (61) and at least two of the rollers (61) clamp the moving mechanism and the two vertical brackets (2) in a facing or opposite manner.

7. A mobile device according to claim 6, characterized in that: The first moving member (31) and the second moving member (32) each comprise two rollers (61), and the two rollers (61) are arranged at intervals in the vertical direction.

8. A mobile device according to claim 6, characterized in that: The adjustment assembly (7) is arranged on the first movable member (31) and is operable to push the roller (61) to move in the direction of the second movable member (32) so as to cooperate with the roller (61) on the second movable member (32) to clamp the vertical bracket (2).

9. A mobile device according to claim 6, characterized in that: The vertical bracket (2) is provided with a track groove (21) along the length direction, and the wheel surface of the roller (61) and the track groove (21) are in contact with each other and are rollingly connected.

10. A 3D printer, characterized in that: It comprises a printing head (9) and a moving device as claimed in any one of claims 1 to 9, wherein the printing head (9) is slidably connected to a transverse support (3).

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