Laser cleaning pen

Abstract

The application relates to a laser cleaning pen, which comprises a shell, a laser head, a prism and a focusing mirror. The laser head is arranged in the shell and is used for emitting laser. The focusing mirror is arranged in the shell and is located in front of the prism, and is used for focusing a shaped light spot to obtain a focused light spot. For example, in the process of cleaning the combustion chamber of an engine and the wall of an exhaust branch pipe, the shell is directly inserted into the combustion chamber or the exhaust branch pipe, the laser head emits laser, the laser is shaped by the prism to obtain a shaped light spot, the shaped light spot is focused by the focusing mirror to obtain a focused light spot, and when the focused light spot hits the wall of the cleaned object, the carbon deposit on the wall of the cleaned object can be removed, thereby achieving good cleaning effect. Therefore, the laser cleaning of carbon deposit can be realized at any time in a small space, the cleaning efficiency is high, the cleaning effect is good, the operation is convenient, efficient and accurate, and the technical difficulty that the carbon deposit in a small space cannot be cleaned is solved.

Description

Technical Field

[0001] This invention relates to the field of laser cleaning technology, and in particular to a laser cleaning pen. Background Technology

[0002] After prolonged engine operation, a large amount of carbon deposits will accumulate on the inner walls of the combustion chamber and the walls of the intake and exhaust manifolds. When the amount of carbon deposits reaches a certain level, it will affect the engine's performance and lifespan, thus requiring regular or irregular engine cleaning. Traditional cleaning methods generally use chemical agents and mechanical methods to clean the engine. However, before cleaning the engine, it is necessary to disassemble it, resulting in low cleaning efficiency. Furthermore, when the carbon particles on the walls of the combustion chamber and / or exhaust manifolds are tightly adhered, traditional cleaning methods are insufficient to effectively remove the deposits from the surfaces being cleaned. Summary of the Invention

[0003] Therefore, it is necessary to overcome the shortcomings of existing technologies and provide a laser cleaning pen that can improve the cleaning effect and ensure cleaning efficiency.

[0004] The technical solution is as follows: A laser cleaning pen, the laser cleaning pen comprising:

[0005] shell;

[0006] A laser head, which is disposed inside the housing, is used to emit laser light;

[0007] A prism, disposed within the housing and positioned in front of the laser head, has a patterned layer on its surface. The prism is used to shape the laser beam to obtain a shaped spot.

[0008] A focusing lens is disposed inside the housing and located in front of the prism. The focusing lens is used to focus the shaped light spot to obtain a focused light spot.

[0009] The aforementioned laser cleaning pen, specifically used for cleaning the combustion chamber and exhaust manifold walls of an engine, involves inserting the outer casing directly into the combustion chamber or exhaust manifold. The laser head emits a laser beam, which is shaped by a prism to create a shaped spot. This shaped spot is then focused by a focusing lens to create a focused spot. When this focused spot strikes the surface of the object being cleaned, it effectively removes carbon deposits, resulting in a good cleaning effect. Therefore, this laser cleaning tool can perform carbon deposit removal in small spaces anytime, without disassembly, offering high cleaning efficiency, good cleaning results, convenience, and precision, solving the technical challenge of cleaning carbon deposits in confined spaces.

[0010] In one embodiment, the laser cleaning pen further includes a camera; the camera is directly or indirectly disposed on the housing, and the camera is used to acquire images of the area to be cleaned and / or the environment in which the area to be cleaned is located.

[0011] In one embodiment, the laser cleaning pen further includes a reflector; the reflector is disposed inside the housing and in front of the focusing lens, the reflector has a reflective surface, and the reflective surface is set at an angle to the laser emission direction of the laser head; a light-emitting part is formed on the housing, and the laser reflected by the reflective surface is emitted outward through the light-emitting part.

[0012] In one embodiment, the laser cleaning pen further includes a camera; the reflector has a mounting hole that extends to the reflective surface, and the camera is disposed in the mounting hole and located on the reflective surface.

[0013] In one embodiment, the outer shell includes a rotating housing assembly and a fixed housing assembly, the rotating housing assembly and the fixed housing assembly being rotatably connected; the laser cleaning pen further includes a transmission element and a driving mechanism; the prism, the focusing lens, and the reflecting mirror are disposed within the rotating housing assembly; the transmission element is connected to the rotating housing assembly and is capable of driving the rotating housing assembly to rotate; the transmission element is also rotatably disposed within the fixed housing assembly and is connected to the laser head; the transmission element can also guide the laser light from the laser head into the prism; the driving mechanism is disposed within the fixed housing assembly and is used to drive the transmission element to rotate around its central axis.

[0014] In one embodiment, the drive mechanism includes a motor fixedly mounted on the fixed housing assembly, a first gear connected to the shaft of the motor, and a second gear mounted on the transmission element; the first gear meshes with the second gear.

[0015] In one embodiment, the laser cleaning pen further includes a control board and control buttons disposed on the fixed housing assembly; the control buttons, the drive mechanism, and the laser head are all electrically connected to the control board.

[0016] In one embodiment, the laser cleaning pen further includes an electric slip ring disposed inside the fixed housing assembly, the electric slip ring being sleeved on the outside of the transmission element, the camera having a connecting wire, the connecting wire being electrically connected to the electric slip ring; the electric slip ring being electrically connected to the control board.

[0017] In one embodiment, the rotating housing assembly includes a first rotating housing and a second rotating housing. One end of the first rotating housing is connected to the second rotating housing, and the other end of the first rotating housing is connected to a transmission element. The first rotating housing is disposed inside the fixed housing assembly. The prism and the focusing lens are disposed inside the first rotating housing. The reflector is disposed inside the second rotating housing. The end of the fixed housing assembly is rotatably connected to either the first or the second rotating housing. The laser cleaning pen also includes a positioning block disposed inside the second rotating housing. The positioning block abuts against the reflector and the second rotating housing, respectively. The positioning block can guide the laser light entering the second rotating housing to the reflector.

[0018] In one embodiment, the fixed housing assembly includes at least two fixed housing units arranged sequentially along the laser emission direction of the laser head; and / or, the fixed housing assembly has a removable sealing head at one end away from the rotating housing assembly. Attached Figure Description

[0019] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the structure of a laser cleaning pen according to an embodiment of the present invention.

[0022] Figure 2 This is an exploded structural diagram of a laser cleaning pen according to an embodiment of the present invention;

[0023] Figure 3 This is a schematic diagram of the laser cleaning pen according to another embodiment of the present invention.

[0024] Figure 4 for Figure 3 A schematic cross-sectional view at point AA;

[0025] Figure 5 for Figure 4 A magnified structural diagram at point B;

[0026] Figure 6 for Figure 4 A magnified structural diagram at point C.

[0027] 10. Outer shell; 101. Light-emitting part; 102. Light-transmitting cover; 11. Rotating shell assembly; 111. First rotating shell; 112. Second rotating shell; 12. Fixed shell assembly; 121. Fixed shell unit; 122. Sealing head; 20. Laser head; 30. Prism; 40. Focusing lens; 50. Camera; 51. Connecting wire; 60. Reflector; 61. Reflecting surface; 62. Mounting hole; 70. Transmission element; 80. Drive mechanism; 81. First gear; 82. Second gear; 91. Control button; 92. Slip ring; 93. Positioning block. Detailed Implementation

[0028] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0029] See Figure 1 and Figure 2 , Figure 1 This diagram shows a schematic view of the structure of a laser cleaning pen according to an embodiment of the present invention. Figure 2 An exploded view of a laser cleaning pen according to an embodiment of the present invention is shown. The laser cleaning pen provided in one embodiment of the present invention includes: a housing 10, a laser head 20, a prism 30, and a focusing lens 40. The laser head 20 is disposed within the housing 10 and is used to emit laser light. The prism 30 is disposed within the housing 10 and located in front of the laser head 20. The prism 30 has a patterned layer (not shown in the figure) and is used to shape the laser light to obtain a shaped light spot. The focusing lens 40 is disposed within the housing 10 and located in front of the prism 30, and is used to focus the shaped light spot to obtain a focused light spot.

[0030] The aforementioned laser cleaning pen, specifically used for cleaning the combustion chamber and exhaust manifold walls of an engine, involves the outer casing 10 being directly inserted into the combustion chamber or exhaust manifold. The laser head 20 emits a laser beam, which is shaped by a prism 30 to obtain a shaped spot. This shaped spot is then focused by a focusing lens 40 to obtain a focused spot. When this focused spot strikes the surface of the object being cleaned, it effectively removes carbon deposits, resulting in a good cleaning effect. Therefore, this laser cleaning tool can perform carbon deposit cleaning in small spaces anytime, without disassembly, offering high cleaning efficiency, good cleaning results, convenience, efficiency, and precision, thus solving the technical challenge of cleaning carbon deposits in small spaces.

[0031] It should be noted that the shape of the shaping spot is related to the pattern layer, that is, it is determined by the shape of the cutout pattern in the pattern layer. When the cutout pattern in the pattern layer is a regular or irregular shape such as W, S, Z, M, the shape of the resulting shaping spot will be a regular or irregular shape such as W, S, Z, M, etc.

[0032] It should also be noted that the prism 30 being located in front of the laser head 20 means that, with the laser emission direction of the laser head 20 as a reference, the laser head 20 and the prism 30 are arranged sequentially along the laser emission direction.

[0033] Similarly, the fact that the focusing lens 40 is located in front of the prism 30 means that, with the laser emission direction of the laser head 20 as a reference, the prism 30 and the focusing lens 40 are arranged sequentially along the laser emission direction.

[0034] Please see Figure 2 , Figure 4 and Figure 5 In one embodiment, the laser cleaning pen also includes a camera 50. The camera 50 is directly or indirectly disposed on the housing 10, and is used to acquire images of the area to be cleaned and / or the environment in which the area to be cleaned is located. In this way, the camera 50 can acquire images of the area to be cleaned and / or the environment in which the area to be cleaned is located. By observing the images, the cleaning effect can be determined, and the cleaning operation can be flexibly adjusted according to the images, which helps to ensure the cleaning effect.

[0035] Please see Figure 2 , Figure 4 and Figure 5 In one embodiment, the laser cleaning pen further includes a reflector 60. The reflector 60 is disposed inside the housing 10 and in front of the focusing lens 40. The reflector 60 has a reflecting surface 61, which is angled to the laser emission direction of the laser head 20. A light-emitting portion 101 is formed on the housing 10, and the laser reflected by the reflecting surface 61 is emitted outward through the light-emitting portion 101. Thus, after the focused light spot of the focusing lens 40 strikes the reflector 60, it is reflected by the reflector 60, and the reflected focused light spot is emitted outward through the light-emitting portion 101. When the outwardly emitted focused light spot contacts the area to be cleaned, it performs a cleaning function. Furthermore, when the housing 10 is driven around its central axis (i.e., the laser emission direction of the laser head 20, such as...), the laser cleaning pen can also perform a cleaning function. Figure 1 As shown by arrow O in the diagram, when the mirror 60 rotates, the focused light spot emitted from the reflector 60 is angled to the central axis, resulting in a ring-shaped focused light spot emitted outward through the light-emitting section 101, thus covering a large cleaning range.

[0036] In one embodiment, the reflective surface 61 of the reflector 60 is provided with a gold or silver layer, which can effectively reflect laser light.

[0037] In one embodiment, the light-emitting part 101 includes, but is not limited to, a window or transparent part formed on the side wall of the housing 10, through which the laser reflected by the reflective surface 61 is emitted directly outward, or through the transparent part.

[0038] As an alternative, the reflector 60 can be omitted, and the light-emitting part 101 can be positioned at the head of the housing 10, that is, directly in front of the focusing lens 40. In this way, the focused light spot of the focusing lens 40 is emitted directly outward through the light-emitting part 101 located in front of it.

[0039] In one embodiment, the angle between the reflective surface 61 and the laser emission direction of the laser head 20 is, but is not limited to, 15°-180°. Specific examples include 15°, 30°, 45°, 50°, 55°, 60°, 75°, 80°, 90°, 95°, 100°, 115°, 130°, 150°, 180°, etc.

[0040] Please see Figure 2 , Figure 4 and Figure 5 In one embodiment, the laser cleaning pen also includes a camera 50. A mounting hole 62 is provided on the reflector 60. The mounting hole 62 extends to the reflective surface 61, and the camera 50 is disposed in the mounting hole 62 and located on the reflective surface 61. Thus, the camera 50 can directly and synchronously acquire images of the area being cleaned by the laser, and can observe the cleaning effect on the cleaned area.

[0041] In one embodiment, the camera 50 is not limited to being mounted on the reflective surface 61, but can also be mounted at any other position on the reflector 60, and can be flexibly adjusted and set according to actual needs. For example, the camera 50 is positioned facing forward, and a light-transmitting cover 102 is provided at the head of the housing 10, so that the camera 50 directly acquires the image directly in front of the housing 10.

[0042] Please see Figure 2 , Figure 4 and Figure 5In one embodiment, the outer casing 10 includes a rotating casing assembly 11 and a fixed casing assembly 12. The rotating casing assembly 11 and the fixed casing assembly 12 are rotatably connected. The laser cleaning pen also includes a transmission element 70 and a drive mechanism 80. A prism 30, a focusing lens 40, and a reflecting mirror 60 are disposed within the rotating casing assembly 11. The transmission element 70 is connected to the rotating casing assembly 11 and can drive the rotating casing assembly 11 to rotate. The transmission element 70 is also rotatably disposed within the fixed casing assembly 12 and is connected to the laser head 20. The transmission element 70 can also guide the laser from the laser head 20 into the prism 30. Furthermore, the drive mechanism 80 is disposed within the fixed casing assembly 12 and is used to drive the transmission element 70 to rotate about its central axis. Thus, on the one hand, the transmission element 70 can guide the laser from the laser head 20 into the prism 30; on the other hand, under the drive of the drive mechanism 80, the transmission element 70 can be driven to rotate. When the transmission element 70 rotates, it can drive the rotating housing assembly 11 to rotate. When the rotating housing assembly 11 rotates, it can adjust the light emission position of the light emission section 101 accordingly. There is no need for manual rotation of the housing 10, resulting in a high degree of automation and a large cleaning area.

[0043] In one embodiment, the transmission element 70 is, for example, a transmission tube, through which the laser from the laser head 20 is transmitted forward to the prism 30. Alternatively, the transmission element 70 can be made of a light-guiding material, guiding the laser from the laser head 20 forward to the prism 30.

[0044] Please see Figure 2 , Figure 4 and Figure 5 In one embodiment, the transmission element 70 can be rotatably connected to the laser head 20 or rotate synchronously. This is not limited and can be flexibly set according to actual needs.

[0045] Please see Figure 2 , Figure 4 and Figure 6 In one embodiment, the drive mechanism 80 includes a motor fixedly mounted on the fixed housing assembly 12, a first gear 81 connected to the motor's shaft, and a second gear 82 mounted on the transmission element 70. The first gear 81 and the second gear 82 mesh. Thus, when the motor rotates, the motor drives the first gear 81 to rotate, the first gear 81 drives the second gear 82 to rotate, and the second gear 82 drives the transmission element 70 to rotate.

[0046] Please see Figure 2 , Figure 4 and Figure 6In one embodiment, the laser cleaning pen further includes a control board and a control button 91 disposed on the fixed housing assembly 12. The control button 91, the drive mechanism 80, and the laser head 20 are all electrically connected to the control board. Thus, by operating the control button 91, a control signal is transmitted to the control board, and the control board accordingly controls the laser head 20 to operate and controls the drive mechanism 80 to operate.

[0047] In one embodiment, a touch screen is provided on the fixed housing assembly 12, for example, and the touch screen is electrically connected to the control board. Thus, control operations are performed via the touch screen to control the operation of the laser head 20 and the drive mechanism 80.

[0048] Please see Figure 2 , Figure 4 and Figure 6 In one embodiment, the laser cleaning pen further includes an electric slip ring 92 disposed inside the fixed housing assembly 12. The electric slip ring 92 is sleeved on the outside of the transmission element 70. The camera 50 is provided with a connecting wire 51, which is electrically connected to the electric slip ring 92. The electric slip ring 92 is electrically connected to the control board. Thus, the camera 50 is electrically connected to the control board via the electric slip ring 92, and the electric slip ring 92 does not interfere with the rotation of the camera 50, ensuring that the camera 50 rotates smoothly according to actual needs, and the captured image is not affected by the rotation.

[0049] Please see Figure 2 , Figure 4 and Figure 5 In one embodiment, the rotating housing assembly 11 includes a first rotating housing 111 and a second rotating housing 112. One end of the first rotating housing 111 is connected to the second rotating housing 112, and the other end of the first rotating housing 111 is connected to the transmission element 70. The first rotating housing 111 is disposed inside the fixed housing assembly 12. The prism 30 and the focusing lens 40 are disposed inside the first rotating housing 111. The reflector 60 is disposed inside the second rotating housing 112. The end of the fixed housing assembly 12 is rotatably connected to either the first rotating housing 111 or the second rotating housing 112. Furthermore, the laser cleaning pen also includes a positioning block 93 disposed inside the second rotating housing 112. The positioning block 93 abuts against both the reflector 60 and the second rotating housing 112, and the positioning block 93 can guide the laser light entering the second rotating housing 112 to the reflector 60.

[0050] In one embodiment, the first rotating shell 111 is, for example, a sleeve with a circular, square, or other shaped cross-section. Furthermore, a light-transmitting opening is provided at the position where the second rotating shell 112 mates with the first rotating shell 111, allowing the laser to enter the interior of the second rotating shell 112 through the light-transmitting opening.

[0051] It should be noted that, as an example, the positioning block 93 is a structural component made of light-guiding material, and it can also be a channel through which laser light passes.

[0052] Please see Figure 2 and Figure 4 In one embodiment, the fixed housing assembly 12 includes at least two fixed housing units 121 arranged sequentially along the laser emission direction of the laser head 20. And / or, a removable sealing head 122 is provided on the fixed housing assembly 12 at the end away from the rotating housing assembly 11.

[0053] It should be noted that the fixed shell unit 121 includes, but is not limited to, shell sleeves with axial cross-sections of circular, square, triangular, hexagonal, etc. Furthermore, the connection methods of adjacent fixed shell units 121 include, but are not limited to, threaded connections, adhesive bonding, or detachable connections using screws, pins, rivets, snap-fit ​​components, etc.

[0054] It should be noted that the "sealing head 122" can be "a part of the fixed shell unit 121", that is, the "sealing head 122" and "other parts of the fixed shell unit 121" are integrally molded; or it can be an independent component that can be separated from "other parts of the fixed shell unit 121", that is, the "sealing head 122" can be manufactured independently and then combined with "other parts of the fixed shell unit 121" to form a whole.

[0055] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0056] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

[0057] In the description of this invention, 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," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention 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. Therefore, they should not be construed as limitations on this invention.

[0058] 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 technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0059] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0060] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0061] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

Claims

1. A laser cleaning pen, characterized in that, The laser cleaning pen includes: shell; A laser head, which is disposed inside the housing, is used to emit laser light; A prism is disposed inside the housing and located in front of the laser head. The prism has a pattern layer and is used to shape the laser beam to obtain a shaped spot. A focusing lens is disposed inside the housing and located in front of the prism. The focusing lens is used to focus the shaped light spot to obtain a focused light spot. A reflector is disposed inside the housing and in front of the focusing lens. The reflector has a reflective surface, which is set at an angle to the laser emission direction of the laser head. A light-emitting part is formed on the housing, and the laser reflected by the reflective surface is emitted outward through the light-emitting part. A rotating housing assembly and a fixed housing assembly are rotatably connected, and the prism, the focusing lens, and the reflecting mirror are disposed inside the rotating housing assembly; The transmission element is connected to the rotating housing assembly and can drive the rotating housing assembly to rotate around its central axis. The drive mechanism is used to drive the transmission element to rotate around its central axis.

2. The laser cleaning pen according to claim 1, characterized in that, The laser cleaning pen also includes a camera; the camera is directly or indirectly disposed on the housing, and the camera is used to acquire images of the area to be cleaned and / or the environment in which the area to be cleaned is located.

3. The laser cleaning pen according to claim 1, characterized in that, The laser cleaning pen also includes a camera; the reflector has a mounting hole that extends to the reflective surface, and the camera is disposed in the mounting hole and located on the reflective surface.

4. The laser cleaning pen according to claim 3, characterized in that, The transmission element is also rotatably disposed within the fixed housing assembly, and the transmission element can also guide the laser from the laser head into the prism; the drive mechanism is disposed within the fixed housing assembly.

5. The laser cleaning pen according to claim 4, characterized in that, The drive mechanism includes a motor fixedly mounted on the fixed housing assembly, a first gear connected to the shaft of the motor, and a second gear mounted on the transmission element; the first gear meshes with the second gear.

6. The laser cleaning pen according to claim 4, characterized in that, The laser cleaning pen also includes a control board and control buttons disposed on the fixed housing assembly; the control buttons, the drive mechanism, and the laser head are all electrically connected to the control board.

7. The laser cleaning pen according to claim 6, characterized in that, The laser cleaning pen also includes an electric slip ring disposed inside the fixed housing assembly, the electric slip ring being sleeved on the outside of the transmission element, the camera having a connecting wire, the connecting wire being electrically connected to the electric slip ring; the electric slip ring being electrically connected to the control board.

8. The laser cleaning pen according to claim 4, characterized in that, The rotating housing assembly includes a first rotating housing and a second rotating housing. One end of the first rotating housing is connected to the second rotating housing, and the other end of the first rotating housing is connected to a transmission element. The first rotating housing is disposed inside the fixed housing assembly. The prism and the focusing lens are disposed inside the first rotating housing. The reflector is disposed inside the second rotating housing. The end of the fixed housing assembly is rotatably connected to either the first or the second rotating housing. The laser cleaning pen also includes a positioning block disposed inside the second rotating housing. The positioning block abuts against the reflector and the second rotating housing, respectively. The positioning block can guide the laser entering the second rotating housing to the reflector.

9. The laser cleaning pen according to claim 4, characterized in that, The fixed housing assembly includes at least two fixed housing units arranged sequentially along the laser emission direction of the laser head.

10. The laser cleaning pen according to claim 4, characterized in that, The fixed housing assembly has a removable sealing head at one end away from the rotating housing assembly.

Images