Prism motor and laser scanning device

Abstract

The utility model belongs to the technical field of laser, and relates to a prism motor and a laser scanning device.The prism motor comprises a first shell, a second shell, a bearing assembly, a rotor assembly, a prism, a stator assembly and an anti-channeling assembly.The bearing assembly comprises a shaft core, and the two ends of the shaft core are fixedly connected with the first shell and the second shell correspondingly; the rotor assembly is arranged on the periphery of the shaft core and can rotate around the shaft core, the prism is fixed to the rotor assembly, the stator assembly is arranged on the periphery of the rotor assembly in a surrounding mode, the anti-channeling assembly comprises a magnetic part, the magnetic part is arranged on the periphery of the rotor assembly in a surrounding mode, and the magnetic part and the rotor assembly are arranged in a spaced mode. According to the technical scheme provided by the invention, the magnetic part is arranged on the rotor assembly, and the magnetic field of the magnetic part has adsorption force on the rotating shaft, so that the axial movement of the rotor assembly during high-speed rotation can be reduced, and the stability and accuracy of the prism motor during rotation are improved; in addition, the prism is directly fixed on the rotor assembly, so that the prism motor is more compact in overall structure and smaller in size.

Description

Technical Field

[0001] The present application relates to the field of laser technology, and more specifically, to a prism motor and a laser scanning device. Background Art

[0002] At present, laser applications are becoming more and more widespread, such as laser marking, laser 3D printing, laser radar, etc. The above laser applications generally require a scanning device to complete the reflection and scanning of the laser. A scanning device is a device that can realize repeated linear scanning of the laser. The scanning device can reflect the laser to the processing plane and move the laser on the processing plane. Most scanning devices use prisms to reflect and scan the laser, and the prism is driven by a motor. The existing prism motor has a complex structure and a large size. The rotor jumps when it rotates, and the rotation accuracy is not high. Utility Model Content

[0003] The technical problem to be solved by the embodiments of the present application is: in the prior art, the rotation accuracy of the prism motor is not high and the size is relatively large.

[0004] In order to solve the above technical problems, the embodiment of the present application provides a prism motor, which adopts the following technical solution:

[0005] A prism motor, comprising: a first housing, a second housing, a bearing assembly, a rotor assembly, a prism, a stator assembly and an anti-slip assembly, wherein the first housing and the second housing are connected to each other to form an installation cavity, and the bearing assembly, the rotor assembly, the prism, the stator assembly and the anti-slip assembly are arranged in the installation cavity;

[0006] The bearing assembly comprises a shaft core, and two ends of the shaft core are respectively fixedly connected to the first shell and the second shell;

[0007] The rotor assembly is arranged on the outer periphery of the shaft core, and the rotor assembly can rotate around the shaft core;

[0008] The prism is fixed on the rotor assembly, and the prism rotates synchronously with the rotor assembly;

[0009] The stator assembly is fixed on the cavity wall of the installation cavity, and the stator assembly is arranged around the outer circumference of the rotor assembly;

[0010] The anti-slip assembly is fixed on the cavity wall of the installation cavity. The anti-slip assembly includes a magnetic member. The magnetic member is arranged around the outer circumference of the rotor assembly and is spaced apart from the rotor assembly. The magnetic member provides radial magnetic attraction for the rotor assembly.

[0011] Furthermore, the rotor assembly includes a rotating shaft, which is sleeved on the outer circumference of the shaft core and can rotate around the shaft core, the prism motor is fixed on the rotating shaft and rotates coaxially with the rotating shaft, and the magnetic member is sleeved on the outer circumference of the rotating shaft to provide radial magnetic attraction for the rotating shaft.

[0012] Furthermore, the bearing assembly also includes a first limit member and a second limit member, the first limit member is fixed on the side of the shaft core close to the first shell, the second limit member is fixed on the side of the shaft core close to the second shell, and the two ends of the rotating shaft in the axial direction are respectively abutted against the first limit member and the second limit member.

[0013] Furthermore, the rotor assembly also includes a magnet and a protective cover, the magnet is fixed on the rotating shaft, and the protective cover is fixed on the magnet.

[0014] Furthermore, the rotor assembly also includes a balancing piece, which is fixed on the rotating shaft, and an adjustment hole is provided on the balancing piece and / or the prism.

[0015] Furthermore, the stator assembly includes a stator core and a stator coil connected to each other, the stator core and the stator coil are arranged around the outer circumference of the magnet, and the stator assembly is used to drive the magnet to drive the rotating shaft to rotate.

[0016] Furthermore, the prism motor also includes a Hall sensor, which is fixed on the stator assembly and is used to monitor the rotation angle of the rotor assembly.

[0017] Furthermore, the first shell is provided with a first positioning member, the second shell is provided with a second positioning member matched with the first positioning member, the first positioning member is integrally formed with the first shell, and the second positioning member is integrally formed with the second shell.

[0018] Furthermore, the prism is arranged adjacent to the first shell, the circumferential side wall of the prism is provided with a reflecting surface for reflecting laser light, and the first shell is provided with a light inlet, and the laser light is incident on the reflecting surface through the light inlet.

[0019] In order to solve the above technical problems, the embodiment of the present application further provides a laser scanning device, which adopts the following technical solution:

[0020] A laser scanning device comprises the prism motor as described above.

[0021] Compared with the prior art, the embodiments of the present application have the following beneficial effects:

[0022] (1) The present application sets a magnetic part on the rotor assembly. The magnetic field of the magnetic part has an adsorption force on the rotating shaft, which can reduce the axial movement of the rotor assembly during high-speed rotation and improve the stability and rotation accuracy of the prism motor during rotation.

[0023] (2) The prism is directly set on the rotor assembly, and there is no need to install the prism through other connecting shafts. The overall structure of the prism motor is compact, the volume is small, and the rotation accuracy is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the solutions in the present application or the prior art, a brief introduction is given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0025] Figure 1 It is a three-dimensional structural schematic diagram of a prism motor provided by an embodiment of the utility model;

[0026] Figure 2 is a cross-sectional schematic diagram of a prism motor provided by an embodiment of the utility model;

[0027] Figure 3 It is an exploded schematic diagram of a prism motor provided by an embodiment of the utility model;

[0028] Figure 4 It is a three-dimensional structural schematic diagram of a prism and a rotor assembly provided in an embodiment of the utility model;

[0029] Figure 5 It is a schematic diagram of the three-dimensional structure of a prism provided in an embodiment of the utility model;

[0030] Figure 6 It is a three-dimensional structural schematic diagram of the Hall sensor provided in the embodiment of the utility model.

[0031] Reference numerals:

[0032] 10. Prism motor; 1. First shell; 11. Light inlet; 12. First flange; 13. Dust cover; 14. Cover hole; 2. Second shell; 21. Second positioning piece; 22. Second flange; 3. Bearing assembly; 31. Shaft core; 32. First stop piece; 33. Second stop piece; 4. Rotor assembly; 41. Rotating shaft; 42. Magnet; 43. Protective cover; 44. Balance piece; 45. Adjustment hole; 5. Prism; 51. Reflecting surface; 52. Fixing piece; 6. Stator assembly; 61. Stator core; 62. Stator coil; 7. Anti-channeling assembly; 71. Magnetic piece; 72. Fixing seat; 8. Hall sensor; 81. Circuit board; 82. Hall element; 83. Motor lead terminal; 84. Sensor lead terminal; 85. Support column. DETAILED DESCRIPTION

[0033] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by technicians in the technical field of this application; the terms used in the specification of the application herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, not to describe a specific order.

[0034] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0035] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings.

[0036] Combine the following Figures 1 to 6 , describing an embodiment of the utility model.

[0037] Please refer to Figure 1 to Figure 3 As shown, the prism motor 10 of the present application includes: a first housing 1, a second housing 2 、The bearing assembly 3, the rotor assembly 4, the prism 5, the stator assembly 6 and the anti-slip assembly 7, the first shell 1 and the second shell 2 are connected to each other to form an installation cavity, and the bearing assembly 3, the rotor assembly 4, the prism 5, the stator assembly 6 and the anti-slip assembly 7 are arranged in the installation cavity; the bearing assembly 3 includes an axis core 31, and the two ends of the axis core 31 are respectively fixedly connected to the first shell 1 and the second shell 2; the rotor assembly 4 is arranged on the outer periphery of the axis core 31, and the rotor assembly 4 can rotate around the axis core 31; the prism 5 is fixed on the rotor assembly 4, and the prism 5 rotates synchronously with the rotor assembly 4; the stator assembly 6 is fixed on the cavity wall of the installation cavity, and the stator assembly 6 is arranged around the outer periphery of the rotor assembly 4; the anti-slip assembly 7 is fixed on the cavity wall of the installation cavity, and the anti-slip assembly 7 includes a magnetic member 71 sleeved on the outer periphery of the rotor assembly 4, the magnetic member 71 is spaced apart from the rotor assembly 4, and the magnetic member 71 provides radial magnetic attraction for the rotor assembly 4.

[0038] In this embodiment, the shaft core 31 is in the shape of a cylindrical rod, and the shaft core 31 is made of a high-hardness and wear-resistant material. Preferably, the shaft core 31 is made of a ceramic material with a low friction coefficient, high hardness and wear resistance. The two ends of the shaft core 31 are directly or indirectly connected to the first shell 1 and the second shell 2. The prism 5 is directly fixed on the rotor assembly 4, and the rotor assembly 4 drives the prism 5 to rotate synchronously around the shaft core 31. There is no need to install the prism 5 through other connecting shafts. The overall structure of the prism motor 10 is compact, the volume is small, and the rotation accuracy is high.

[0039] In this example, the anti-slip assembly 7 includes a fixing seat 72 and a magnetic member 71. The fixing seat 72 is fixed on the cavity wall of the installation cavity, and the magnetic member 71 is fixed on the fixing seat 72. The magnetic member 71 is arranged on the outer periphery of the rotor assembly 4. The magnetic field of the magnetic member 71 can generate a radial magnetic attraction force on the rotor assembly 4 to prevent the rotor assembly 4 from axially slipping, thereby improving the rotation accuracy of the prism motor 10. In this embodiment, the specific shape and number of the magnetic member 71 are not limited. The magnetic member 71 can be a block structure, and a plurality of block magnetic members 71 are evenly distributed on the outer periphery of the rotor assembly 4; the magnetic member 71 can also be a ring structure, and the ring magnetic member 71 is directly sleeved on the outer periphery of the rotor assembly 4 to generate a uniform magnetic attraction force on the rotor assembly 4.

[0040] In one embodiment, Figure 2 As shown, the rotor assembly 4 includes a rotating shaft 41, the rotating shaft 41 has a through hole for the shaft core 31 to pass through, the shaft core 31 is inserted into the through hole, the rotating shaft 41 is sleeved on the outer periphery of the shaft core 31 and can rotate around the shaft core 31, the prism 5 is fixed on the rotating shaft 41 and rotates coaxially with the rotating shaft 41, and the magnetic member 71 is sleeved on the outer periphery of the rotating shaft 41 and provides radial magnetic attraction for the rotating shaft 41. In this embodiment, the prism 5 is directly fixed on the rotating shaft 41 and rotates coaxially with the rotating shaft 41, which can improve the coaxiality between the prism 5 and the rotating shaft 41, thereby improving the rotation accuracy of the prism motor 10.

[0041] In one embodiment, Figure 2 As shown, the bearing assembly 3 also includes a first stopper 32 and a second stopper 33, and the shaft core 31 is fixed in the installation cavity through the first stopper 32 and the second stopper 33. Specifically, the first stopper 32 and the second stopper 33 are both cylindrical shell structures, and the first stopper 32 and the second stopper 33 are both provided with insertion holes. The first stopper 32 is fixed on the first shell 1, and the second stopper 33 is fixed on the second shell 2. The two ends of the shaft core 31 are inserted into the insertion holes and are respectively fixedly connected with the first stopper 32 and the second stopper 33, and the two ends of the rotating shaft 41 in the axial direction are respectively abutted with the first stopper 32 and the second stopper 33. In an embodiment not shown in the figure, the two ends of the shaft core 31 are directly connected with the first shell 1 and the second shell 2, respectively, the first stopper 32 is fixed on the side of the shaft core 31 close to the first shell 1, and the second stopper 33 is fixed on the side of the shaft core 31 close to the second shell 2.

[0042] In this embodiment, the shaft core 31 provides a radial limiting function for the rotating shaft 41, and the first limiting member 32 and the second limiting member 33 provide an axial supporting function and limiting function for the rotating shaft 41. The shaft core 31, the first limiting member 32 and the second limiting member 33 can reduce the axial and radial movement of the rotating shaft 41 during rotation, and improve the stability of the rotating shaft 41 during rotation. When installing the rotating shaft 41, the axial position of the first limiting member 32 and the second limiting member 33 can be adjusted to eliminate the processing error of the prism motor 10 and thus reduce the axial movement of the rotating shaft 41.

[0043] In one embodiment, Figures 2 to 4 As shown, the rotor assembly 4 also includes a magnet 42 and a protective cover 43. The magnet 42 is fixed on the rotating shaft 41. The magnet 42 is a ring magnet with two pairs of magnetic poles. The magnetization direction of the magnet 42 is the outer diameter magnetization. The protective cover 43 is sleeved on the outer peripheral wall of the magnet 42. The protective cover 43 is made of stainless steel and is used to protect the magnet 42 to prevent the magnet 42 from being worn during the rotation process.

[0044] In one embodiment, Figures 2 to 4As shown, the rotor assembly 4 also includes a balancing member 44, which is fixed on the rotating shaft 41, and a plurality of adjustment holes 45 are provided on the balancing member 44 and the prism 5. The balancing member 44 is a circular ring structure, which is sleeved on the rotating shaft 41, and the adjustment holes 45 are used to adjust the dynamic balance of the prism motor 10. When a certain part of the prism motor 10 is unbalanced, a hole is drilled at the corresponding position of the drillable adjustment hole 45 according to the size of the unbalance to adjust the dynamic balance of the rotor assembly 4. The prism 5 and the rotating shaft 41 form an integrated structure, and the dynamic balance of the prism 5 and the rotor assembly 4 is adjusted together, so that the dynamic balance adjustment is more effective, the motor vibration is small, and the concentricity of the prism motor 10 is high, so that the prism motor 10 can be applied to ultra-high-speed, high-precision, high-repeatability and large-scale scanning processing.

[0045] In one embodiment, Figure 2 As shown, the stator assembly 6 includes a stator core 61 and a stator coil 62 which are connected to each other. The stator core 61 and the stator coil 62 are arranged around the outer periphery of the magnet 42. The stator assembly 6 is used to drive the magnet 42 to drive the rotating shaft 41 to rotate.

[0046] In one embodiment, Figure 2 and Figure 6 As shown, the prism 5 motor also includes a Hall sensor 8, which is fixed on the stator assembly 6 and is used to monitor the rotation angle of the rotor assembly 4. Specifically, the Hall sensor 8 includes a circuit board 81 and a Hall element 82 fixed on the circuit board 81, a sensor lead terminal 84, a motor lead terminal 83 and a support column 85, one end of the support column 85 is fixedly connected to the stator core 61, and the other end of the support column 85 is fixedly connected to the circuit board 81. The Hall element 82 detects the magnetic pole position of the magnet 42 and feeds back the detection signal to the control center, thereby realizing the control of the operation of the prism motor 10.

[0047] In this embodiment, there are three Hall elements 82 , and the three Hall elements 82 are arranged in sequence at intervals of 60 degrees on a circle with the rotating shaft 41 as the center.

[0048] In this embodiment, the lead wires of the stator coil 62 are connected to the circuit board 81, and then connected to the motor lead wire terminal 83 through the circuit board 81. The signal of the Hall element 82 is connected to the sensor lead wire terminal 84 through the circuit board 81. The second shell 2 has a notch at a position corresponding to the motor lead wire terminal 83 and the sensor lead wire terminal 84. The stator coil 62 and the sensor signal connecting wire are connected to the outside of the prism motor 10 through the notch.

[0049] In one embodiment, Figures 1 to 3As shown, a first positioning member (not shown in the figure) is provided on the first shell 1, and a second positioning member 21 matched with the first positioning member is provided on the second shell 2. The first positioning member is integrally connected to the first shell 1, and the second positioning member 21 is integrally connected to the second shell 2. Specifically, a first flange 12 is provided on the side of the first shell 1 close to the second shell 2, and a second flange 22 is provided on the side of the second shell 2 close to the first shell 1. The second positioning member 21 is arranged on the second flange 22. The second positioning member 21 is an annular boss protruding toward the first shell 1, and the outer side wall of the annular boss abuts against the inner side wall of the first shell 1 to achieve positioning between the first shell 1 and the second shell 2. The first flange 12 and the second flange 22 are further strengthened by screws to connect the first shell 1 and the second shell 2. The fixation between the first shell 1 and the second shell 2 is simple, which is convenient for disassembly and maintenance of the prism motor 10.

[0050] In one embodiment, Figures 2 to 5 As shown, the prism 5 is disposed adjacent to the first housing 1, a reflecting surface 51 for reflecting laser light is disposed on the circumferential side wall of the prism 5, and a light inlet 11 is disposed on the first housing 1, through which the laser light is incident on the reflecting surface 51. Specifically, the prism 5 may be a polygonal prism structure, the axial direction of the prism 5 coincides with the axial direction of the rotating shaft 41, and each facet of the polygonal prism 5 is a reflecting surface 51. When the prism 5 rotates, the reflection angle of the reflecting surface 51 changes continuously, so that the reflected laser light moves linearly on the scanning plane, thereby realizing the scanning of the laser light.

[0051] Furthermore, the first housing 1 is provided with a light inlet 11, which can expose at least part of the reflective surface 51 of the prism 5, and the light inlet 11 is also helpful in reducing the weight of the first housing 1. Specifically, the first housing 1 is provided with a light inlet 11 on a side corresponding to the laser emission port (not shown in the figure), and the light inlet 11 exposes at least part of the reflective surface 51 of the prism 5. After the laser is emitted from the emission port, it can be incident on the reflective surface 51 of the prism 5 through the light inlet 11, and then the prism 5 is controlled to rotate to complete the laser scanning.

[0052] In the embodiment of the present application, the assembly steps of the prism motor are as follows:

[0053] Fixing the Hall sensor 8 on the stator assembly 6, and installing the stator assembly 6 in the second housing 2;

[0054] Fix the second limiting member 33 to the bottom of the second housing 2, and insert the shaft core 31 into the insertion hole of the second limiting member 33;

[0055] Install the magnet 42 onto the rotating shaft 41, fix the stainless steel protective cover 43 onto the magnet 42, fix the balance member 44 onto the lower end of the rotating shaft 41, fix the prism 5 onto the upper end of the rotating shaft 41, and fix the fixing member 52 onto the rotating shaft 41. The fixing member 52 fixes the prism 5 and prevents it from moving axially.

[0056] The fixing base 72 is fixed on the first housing 1 , and the magnetic member 71 is fixed on the fixing base 72 ;

[0057] Install the rotating shaft 41 onto the shaft core 31 so that the rotating shaft 41 can rotate around the shaft core 3;

[0058] Install the first housing 1 onto the second housing 2, connect the first housing 1 and the second housing 2 concentrically through the second positioning member 21, and then tighten and fix the first flange 12 and the second flange 22 with screws;

[0059] The first stopper 32 is fixed to the upper end of the first housing 1, and the insertion hole of the first stopper 32 is installed to the upper end of the shaft core 31. The positions of the first stopper 32 and the second stopper 33 are adjusted so that the rotor assembly 4 can rotate flexibly without axial movement.

[0060] The dust cover 13 is mounted on the dust cover hole 14 of the first housing 1 .

[0061] According to an embodiment of the present utility model, a laser scanning device is also provided, comprising the prism motor 10 as described above.

[0062] In this embodiment, the prism 5 of the laser scanning device is directly fixed on the rotor assembly 4, and there is no need to install the prism 5 through other connecting shafts. The overall structure of the prism motor 10 is compact, the volume is small, and the concentricity is high. In addition, a magnetic part 71 is arranged on the rotor assembly 4. The magnetic field of the magnetic part 71 has an adsorption force on the rotating shaft 41, which can reduce the axial movement of the rotor assembly 4 during high-speed rotation, thereby improving the stability and rotation accuracy of the prism motor 10 during rotation.

[0063] Obviously, the embodiments described above are only some embodiments of the present application, rather than all embodiments. The preferred embodiments of the present application are given in the accompanying drawings, but they do not limit the patent scope of the present application. The present application can be implemented in many different forms. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present application more thorough and comprehensive. Although the present application is described in detail with reference to the aforementioned embodiments, for those skilled in the art, it is still possible to modify the technical solutions recorded in the aforementioned specific implementation methods, or to perform equivalent replacement of some of the technical features therein. Any equivalent structure made using the contents of the specification and drawings of this application, directly or indirectly used in other related technical fields, is similarly within the scope of patent protection of this application.

Claims

1. A prism motor, characterized in that: include: A first housing, a second housing, a bearing assembly, a rotor assembly, a prism, a stator assembly and an anti-slip assembly, wherein the first housing and the second housing are connected to each other to form an installation cavity, and the bearing assembly, the rotor assembly, the prism, the stator assembly and the anti-slip assembly are arranged in the installation cavity; The bearing assembly comprises a shaft core, and two ends of the shaft core are respectively fixedly connected to the first shell and the second shell; The rotor assembly is arranged on the outer periphery of the shaft core, and the rotor assembly can rotate around the shaft core; The prism is fixed on the rotor assembly, and the prism rotates synchronously with the rotor assembly; The stator assembly is fixed on the cavity wall of the installation cavity, and the stator assembly is arranged around the outer circumference of the rotor assembly; The anti-slip assembly is fixed on the cavity wall of the installation cavity. The anti-slip assembly includes a magnetic member. The magnetic member is arranged around the outer circumference of the rotor assembly and is spaced apart from the rotor assembly. The magnetic member provides radial magnetic attraction for the rotor assembly.

2. The prism motor according to claim 1, characterized in that: The rotor assembly includes a rotating shaft, which is sleeved on the outer circumference of the shaft core and can rotate around the shaft core. The prism motor is fixed on the rotating shaft and rotates coaxially with the rotating shaft. The magnetic member is sleeved on the outer circumference of the rotating shaft to provide radial magnetic attraction for the rotating shaft.

3. The prism motor according to claim 2, characterized in that: The bearing assembly also includes a first limit member and a second limit member, the first limit member is fixed to a side of the shaft core close to the first shell, the second limit member is fixed to a side of the shaft core close to the second shell, and both ends of the rotating shaft in the axial direction are respectively abutted against the first limit member and the second limit member.

4. The prism motor according to claim 3, characterized in that: The rotor assembly also includes a magnet and a protective cover, wherein the magnet is fixed on the rotating shaft, and the protective cover is fixed on the magnet.

5. The prism motor according to claim 4, characterized in that: The rotor assembly further comprises a balancing piece, wherein the balancing piece is fixed on the rotating shaft, and an adjustment hole is provided on the balancing piece and / or the prism.

6. The prism motor according to claim 5, characterized in that: The stator assembly includes a stator core and a stator coil connected to each other. The stator core and the stator coil are arranged around the outer circumference of the magnet. The stator assembly is used to drive the magnet to drive the rotating shaft to rotate.

7. The prism motor according to claim 6, characterized in that: The prism motor also includes a Hall sensor, which is fixed on the stator assembly and is used to monitor the rotation angle of the rotor assembly.

8. The prism motor according to any one of claims 1 to 7, characterized in that: The first housing is provided with a first positioning member, the second housing is provided with a second positioning member matched with the first positioning member, the first positioning member is integrally formed with the first housing, and the second positioning member is integrally formed with the second housing.

9. The prism motor according to claim 8, characterized in that: The prism is arranged adjacent to the first shell, the circumferential side wall of the prism is provided with a reflecting surface for reflecting laser light, and the first shell is provided with a light inlet, through which the laser light is incident on the reflecting surface.

10. A laser scanning device, characterized in that: A prism motor comprising any one of claims 1 to 9.

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