A laser ranging module, a laser range finder and a cleaning device

Abstract

The application relates to a laser distance measuring module, a laser distance meter and a cleaning device. The laser distance measuring module comprises a transmitting assembly, a receiving assembly and a light receiver. The transmitting assembly is used for transmitting a light beam. The receiving assembly comprises a receiving lens and a reflecting film. The receiving lens is arranged on the light path of the light beam reflected by the measured object. The reflecting film is arranged on the light path of the light beam converged by the receiving lens and is attached to the upper surface of the bottom of the laser distance measuring module. The light receiver is arranged on the light path of the light beam reflected by the reflecting film. The receiving lens and the reflecting film in the receiving assembly of the application are designed integrally. When the laser distance measuring module is assembled, the receiving lens and the reflecting film do not need to be assembled again. The requirement for assembly precision is reduced, and the assembly process is saved. In addition, since the reflecting mirror for reflecting the light beam to the light receiver is not used, but the reflecting film arranged on the receiving lens is used to reflect the light beam, the risk of the reflecting film falling off is low.

Description

Technical Field

[0001] This application relates to the field of laser ranging technology, and in particular to a laser ranging module, a laser rangefinder, and a cleaning device. Background Technology

[0002] A laser rangefinder is an instrument that uses laser technology to measure distance. The laser ranging module is the core component of the laser rangefinder, directly affecting its ranging accuracy and stability. In addition to the laser ranging module, a laser rangefinder also includes a support bracket for the laser ranging module, a data processing unit for data processing, and a power management system for power supply.

[0003] For laser ranging modules, their design and manufacturing processes are particularly critical. A traditional laser ranging module includes a transmitting component, a receiving lens, two reflectors, and a light receiver. The transmitting component emits a light beam, which travels through one of the reflectors to the object being measured. After being reflected by the object, the beam is focused by the receiving lens onto the other reflector, which then reflects the beam back to the light receiver. Based on the time difference between the emitted beam and the received beam, or the optical path geometry, the distance between the laser rangefinder and the object can be calculated.

[0004] However, traditional laser ranging modules still have many shortcomings in practical applications. For example, the separate arrangement of the receiving lens and the reflector used to reflect the beam to the optical receiver not only requires high assembly precision, thus increasing production costs and maintenance difficulty, but also poses a risk of the reflector falling off. Utility Model Content

[0005] In view of the above problems, embodiments of this application provide a laser ranging module, a laser rangefinder, and a cleaning device, which overcome the above problems or at least partially solve the above problems.

[0006] According to one aspect of the embodiments of this application, a laser ranging module is provided, including a transmitting component, a receiving component, and a light receiver; the transmitting component is used to emit a light beam; the receiving component includes a receiving lens and a reflective film; the receiving lens is disposed in the optical path of the light beam reflected by the object being measured, the reflective film is disposed in the optical path of the light beam converged by the receiving lens and is attached to the upper surface of the bottom of the laser ranging module, and the light receiver is disposed in the optical path of the light beam reflected by the reflective film, the light receiver being used to receive the light beam reflected by the reflective film.

[0007] In one alternative embodiment, the laser ranging module further includes a lens barrel, in which at least a portion of the emitting component and the light receiver are housed; the lens barrel has a first opening and a second opening disposed opposite to each other, the first opening being located in the optical path of the light beam emitted by the emitting component, and the second opening being disposed in the optical path of the light beam reflected by the reflective film.

[0008] In one alternative embodiment, the lens barrel is black and the receiving lens is transparent.

[0009] In one alternative, the receiving lens is injection molded into the lens barrel, with a portion of the receiving lens surrounding the lens barrel and another portion of the receiving lens located at the second opening.

[0010] In one alternative embodiment, the laser ranging module further includes a circuit board, on which the transmitting component and / or the optical receiver are disposed.

[0011] In one alternative embodiment, the circuit board has a first surface and a second surface disposed opposite to each other along a first direction, the emitting component is disposed on the first surface, the light receiver is disposed on the second surface, and the reflective film is disposed at a distance from the light receiver along the first direction.

[0012] In one alternative embodiment, the emitting assembly includes a light emitter and an emitting lens, the light emitter being used to emit a light beam, the light emitter being disposed on the first surface, and the emitting lens being located in the optical path of the light beam emitted by the light emitter.

[0013] In one alternative embodiment, the laser ranging module further includes a bracket, on which the circuit board and the receiving component are disposed.

[0014] In one alternative embodiment, the bracket includes a body portion and a recessed portion, the body portion being disposed around the recessed portion, the circuit board being mounted on the body portion, and at least a portion of the receiving component being accommodated in the recessed portion.

[0015] In one alternative embodiment, the laser ranging module further includes a reflector; the reflector is located in the optical path of the beam emitted by the transmitting component, and the reflector is used to reflect the beam emitted by the transmitting component to the object under test; the reflector is located in the optical path of the beam reflected by the object under test, and the reflector is used to reflect the beam reflected by the object under test to the receiving component.

[0016] According to one aspect of this application, a laser rangefinder is provided, including the aforementioned laser ranging module.

[0017] According to one aspect of this application, a cleaning device is provided, including the aforementioned laser rangefinder.

[0018] The beneficial effects of this application's embodiments are as follows: A laser ranging module is provided, including a transmitting component, a receiving component, and a light receiver. The transmitting component is used to emit a light beam. The receiving component includes a receiving lens and a reflective film. The receiving lens is disposed in the optical path of the light beam reflected by the object being measured. The reflective film is disposed in the optical path of the light beam converged by the receiving lens and is attached to the upper surface of the bottom of the laser ranging module. The light receiver is disposed in the optical path of the light beam reflected by the reflective film and is used to receive the light beam reflected by the reflective film. The receiving lens and reflective film in the receiving component of this application are integrated, eliminating the need for separate assembly of the receiving lens and reflective film during the assembly of the laser ranging module. This reduces the requirements for assembly accuracy and saves assembly steps, resulting in lower production costs and maintenance difficulty for the laser ranging module. Furthermore, since the use of a reflector for reflecting the light beam to the light receiver is eliminated, and the light beam reflection is achieved using a reflective film disposed on the receiving lens, the risk of the reflective film detaching is low, solving the technical problem of the risk of detachment of reflectors used for reflecting the light beam to the light receiver in the prior art. Attached Figure Description

[0019] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0020] Figure 1 This is a schematic diagram of one implementation of the laser ranging module provided in the embodiments of this application.

[0021] Figure 2 This is a schematic diagram of the optical path of one implementation of the laser ranging module provided in this application embodiment.

[0022] Figure 3 This is a schematic diagram of another implementation of the laser ranging module provided in the embodiments of this application.

[0023] Figure 4 This is a schematic diagram of the optical path of another implementation of the laser ranging module provided in the embodiments of this application.

[0024] Figure 5 This is a schematic diagram of another implementation of the laser ranging module provided in the embodiments of this application.

[0025] Figure 6 This is a schematic diagram of the optical path of another implementation of the laser ranging module provided in the embodiments of this application.

[0026] The labels in the attached diagram are as follows: 100. Laser ranging module; 10. Transmitting component; 20. Receiving component; 30. Optical receiver; 40. Lens tube; 50. Circuit board; 60. Reflector; 70. Support; 11. Light emitter; 12. Emitting lens; 21. Receiving lens; 22. Reflective film; D1. First direction; 41. First opening; 42. Second opening; 51. First surface; 52. Second surface; 71. Body part; 72. Recessed part. Detailed Implementation

[0027] To facilitate understanding of this application, a more detailed description is provided below with reference to the accompanying drawings and specific embodiments. It should be noted that when an element is described as being "fixed to" another element, it can be directly attached to the other element, or one or more intermediate elements may exist between them. When an element is described as being "connected to" another element, it can be directly connected to the other element, or one or more intermediate elements may exist between them. The terms "vertical," "horizontal," "left," "right," "inner," "outer," and similar expressions used in this specification are for illustrative purposes only.

[0028] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of the application. The term "and / or" as used in this specification includes any and all combinations of one or more of the associated listed items.

[0029] Please see Figure 1 and Figure 2This application provides a laser ranging module 100, including a transmitting component 10, a receiving component 20, and a light receiver 30. The transmitting component 10 emits a light beam; the light beam reflected by the transmitting component 10 is projected onto a measured object, and the measured object reflects the light beam. The receiving component 20 includes a receiving lens 21 and a reflective film 22, which can be attached to the receiving lens 21. The receiving lens 21 is disposed in the optical path of the light beam reflected by the measured object, and the receiving lens 21 is used to converge the light beam reflected by the measured object. The reflective film 22 is disposed in the optical path of the light beam converged by the receiving lens 21, and the reflective film 22 is used to reflect the light beam converged by the receiving lens 21. The reflective film 22 is attached to the upper surface of the bottom of the laser ranging module 100, and the light receiver 30 is disposed in the optical path of the light beam reflected by the reflective film 22. The light beam reflected by the reflective film 22 enters the light receiver, and the light receiver 30 is used to receive the light beam reflected by the reflective film 22. The receiving lens 21 and reflective film 22 in the receiving component 20 of this application are integrated, eliminating the need for separate assembly of the receiving lens 21 and reflective film 22 when assembling the laser ranging module 100. This not only reduces the requirements for assembly accuracy but also saves assembly steps, resulting in lower production costs and maintenance difficulty for the laser ranging module 100. Furthermore, since the use of a reflector for reflecting the beam to the optical receiver 30 is eliminated, and the beam reflection is achieved using the reflective film 22 disposed on the receiving lens 21, the risk of the reflective film 22 detaching is low, solving the technical problem of the risk of detachment of the reflector used in the prior art for reflecting the beam to the optical receiver 30.

[0030] The laser ranging module 100 is provided with a base or pedestal, and the upper surface of the bottom of the laser ranging module 100 is the upper surface of the base or pedestal. The reflective film 22 is attached to the upper surface of the base or pedestal, and the base provides support for the curved reflective mirror 20. This ensures that the optical components maintain a stable spatial position during the measurement process. When the laser ranging module 100 includes the bracket 70 mentioned below, the bracket 70 is a part of the base or pedestal.

[0031] In some embodiments, the emitting component 10 includes a light emitter 11 and an emitting lens 12. The light emitter 11 emits a light beam, and the emitting lens 12 is located in the optical path of the light beam emitted by the light emitter 11. The emitting lens 12 is used to collimate or focus the light beam to meet the needs of different ranging scenarios. The emitting lens 12 can be implemented as a single lens or a combination of multiple lenses, adapted to the emission angle of the light beam and the ranging accuracy requirements. In practical applications, by adjusting the focal length and position of the emitting lens 12, precise control of the light beam can be achieved, thereby improving the applicability and measurement stability of the laser ranging module 100.

[0032] The light emitter 11 can be an optical core, which can be a line laser optical core. A line laser optical core is a core component that can generate a line laser beam. It processes the light beam through specific optical principles and technical designs, causing it to be output in a line form.

[0033] The optical receiver 30 is used to receive and convert the light beam, transforming the optical signal into an electrical signal so that subsequent circuits can process and analyze the signal. The optical receiver 30 typically consists of a photodetector and a signal processing circuit. The photodetector is responsible for converting the received light beam into a current signal, while the signal processing circuit amplifies, filters, and digitizes the current signal to obtain accurate distance information.

[0034] In some embodiments, the reflective film 22 is a partially reflective and partially transmissive optical film, and its reflectivity and transmittance are optimized according to the operating wavelength of the laser ranging module 100 and the sensitivity of the optical receiver 30. Alternatively, in some embodiments, the reflective film 22 is a total reflection film, capable of completely reflecting the light beam to the optical receiver 30 to improve reception efficiency and signal strength. The specific selection of the reflective film 22 can be determined according to actual application requirements and performance indicators. For example, in scenarios requiring high reflection efficiency, selecting a total reflection film can maximize signal strength and measurement accuracy, while in scenarios requiring a balance between reflection and transmission, a partially reflective and partially transmissive optical film can be selected.

[0035] The reflective film 22 is disposed on the receiving lens 21 by forming a thin film layer on the receiving lens 21 through a coating process to ensure that it is tightly bonded to the optical surface of the receiving lens 21, thereby avoiding the problem of film layer peeling off due to external vibration or temperature change. The thin film layer formed by this coating process is the reflective film 22.

[0036] In some embodiments, the laser ranging module 100 further includes a lens barrel 40, in which at least a portion of the emitting component 10 (e.g., a light emitter 11 disposed in the lens barrel 40, a emitting lens 12 located outside the lens barrel 40, or both the light emitter 11 and the emitting lens 12 are housed in the lens barrel 40) and the light receiver 30 are housed. The lens barrel 40 has a first opening 41 and a second opening 42 disposed opposite to each other. The first opening 41 is located in the optical path of the light beam emitted by the emitting component 10 and is used for the light beam emitted by the emitting component 10 to exit. The second opening 42 is disposed in the optical path of the light beam reflected by the reflective film 22 and is used for the light beam reflected by the reflective film 22 to enter the light receiver 30. By setting the lens barrel 40, not only can the emitting component 10 and the light receiver 30 be effectively protected from external environmental interference, but the light-shielding effect of the lens barrel 40 can also reduce the interference of external light on the ranging accuracy, thereby improving the working stability and reliability of the laser ranging module 100.

[0037] It is worth noting that in some embodiments, the lens barrel 40 is black, and the receiving lens 21 is transparent. The black lens barrel 40 effectively absorbs stray light from the outside, reducing its interference with the emitting assembly 10 and / or the light receiver 30. The transparent receiving lens 21 helps to improve the transmittance of the light beam, thereby enhancing the sensitivity and accuracy of the light receiver 30 in receiving the light beam.

[0038] Transparent color refers to a color with a light transmittance of 80% or higher.

[0039] It is worth noting that in some embodiments, the receiving lens 21 is injection molded onto the lens barrel 40, with a portion of the receiving lens 21 surrounding the lens barrel 40 and another portion located at the second opening 42. The first opening 41 is exposed to facilitate the emission of the light beam emitted by the emitting assembly 10. By arranging a portion of the receiving lens 21 around the lens barrel 40, the beam receiving angle can be expanded, thereby improving the light receiver 30's ability to capture the reflected beam. The lens barrel 40 can also be injection molded, with the receiving lens 21 manufactured using a two-color injection molding process. This eliminates the need for additional assembly between the lens barrel 40 and the receiving lens 21, improving the overall compactness and stability of the laser ranging module while reducing production costs and assembly errors.

[0040] The two-color injection molding refers to forming the lens barrel 40 from black raw material through injection molding process, and then injection molding the transparent raw material into the lens barrel 40 to form the receiving lens 21.

[0041] In some embodiments, the laser ranging module 100 further includes a circuit board 50, on which the transmitting component 10 and / or the light receiver 30 are disposed. The circuit board 50 not only provides a stable mounting base for the transmitting component 10 and the light receiver 30 in the laser ranging module 100, but also enables electrical connections between electronic components.

[0042] It is worth noting that in some embodiments, the circuit board 50 has a first surface 51 and a second surface 52 disposed opposite to each other along a first direction D1, where the first direction D1 is the thickness direction of the circuit board 50. The emitting component 10 is disposed on the first surface 51, and the light receiver 30 is disposed on the second surface 52. The receiving component 20 is spaced apart from the light receiver 30 along the first direction D1. The emitting component 10 for emitting a light beam and the light receiver 30 for receiving a light beam are respectively disposed on two opposite surfaces of the circuit board 50. The light beam emitted by the emitting component 10 is reflected by the object being measured, converged by the receiving component 20, and received by the light receiver 30. This layout makes the optical path structure compact, and the overall layout of the laser ranging module 100 is compact, making it easy to achieve miniaturization of the laser ranging module 100.

[0043] It is understood that when the emitting assembly 10 includes a light emitter 11 and an emitting lens 12, specifically, the light emitter 11 is disposed on the first surface 51, and the emitting lens 12 is located in the optical path of the light beam. In the emission direction of the light emitter 11, the emitting lens 12 is used to collimate or focus the light beam emitted by the light emitter 11 to improve the quality and propagation efficiency of the light beam.

[0044] It is worth noting that when the laser ranging module 100 includes the lens barrel 40, a part of the circuit board 50 is located inside the lens barrel 40, and another part of the circuit board 50 is arranged around the lens barrel 40. The circuit board 50 located inside the lens barrel 40 is sandwiched between the light emitter 11 and the light receiver 30, thereby providing structural support for the light emitter 11 and the light receiver 30, and enabling the light emitter 11 and the light receiver 30 to be connected to the circuit board 50.

[0045] It is worth noting that in some embodiments, the optical receiver 30 and the optical transmitter 11 are coaxially arranged. This coaxial arrangement means that the light beam emitted by the optical transmitter 11 and the receiving optical path of the optical receiver 30 share the same axis in space. This layout makes the optical path structure compact, resulting in a more compact overall layout of the laser ranging module 100 and facilitating its miniaturization.

[0046] It is worth noting that in some embodiments, the light emitter 11 and the emitting lens 12 are coaxially arranged. The coaxial arrangement of the light emitter 11 and the emitting lens 12 means that the light beam emitted by the light emitter 11 can be collimated or focused by the emitting lens 12 with the shortest optical path, thereby ensuring the directionality and intensity of the light beam, and thus ensuring the measurement accuracy and stability of the laser ranging module 100.

[0047] In some embodiments, please refer to Figure 3 and Figure 4 The laser ranging module 100 also includes a bracket 70, on which the circuit board 50 and the receiving component 20 are mounted. The bracket 70 provides stable support for the circuit board 50 and the receiving component 20, while the circuit board 50 provides stable support for the transmitting component 10 (specifically, a light emitter 11) and the light receiver 30. This ensures that the optical components maintain a stable spatial relationship during measurement, reducing the risk of optical path deviation caused by external vibrations or environmental changes, thereby guaranteeing the accuracy and repeatability of the measurement.

[0048] The design of the bracket 70 can also be optimized according to actual needs, such as adding a shock-absorbing structure or using lightweight, high-strength materials, to further improve the stability and reliability of the laser ranging module 100 in complex environments. In addition, the bracket 70 can also integrate a heat dissipation structure to prevent the performance of optical components from being affected by temperature changes, thereby enabling long-term, high-precision measurements.

[0049] In some embodiments, the support 70 includes a body portion 71 and a recessed portion 72, the body portion 71 surrounding the recessed portion 72, the circuit board 50 being mounted on the body portion 71, and at least a portion of the receiving component 20 being accommodated in the recessed portion 72. For example, the reflective film 22 of the receiving component 20 may be accommodated in the recessed portion 72, or portions of the reflective film 22 and the receiving lens 21 may also be accommodated within the recessed portion 72. The body portion 71 provides support for the circuit board 50, the transmitting component 10 disposed on the circuit board 40, and the light receiver 30. The recessed portion 72 provides mounting space for the receiving component 20.

[0050] In some embodiments, the laser ranging module 100 further includes an outer cover (not shown), which is disposed on the bracket 70. The outer cover effectively protects internal components such as the circuit board 50, the transmitting component 10, the receiving component 20, and the optical receiver 30 from interference from the external environment, thereby improving the structural stability and environmental adaptability of the entire laser ranging module 100.

[0051] It is worth noting that in some embodiments, please refer to [link / reference]. Figure 5 and Figure 6The laser ranging module 100 further includes a reflector 60. The reflector 60 is located in the optical path of the beam emitted by the emitting component 10, and is used to reflect the beam emitted by the emitting component 10 to the object under test. The reflector 60 is also located in the optical path of the beam reflected by the object under test, and is used to reflect the beam reflected by the object under test to the receiving component 20 (specifically, first to the receiving lens 21 of the receiving component 20). Through the arrangement of the reflector 60, effective guidance and path control of the beam emitted by the reflecting component 10 are achieved, ensuring that the beam accurately reaches the object under test even in complex environments. After the object under test reflects the beam, the reflector 60 can effectively guide the reflected beam to the receiving component 20, realizing the measurement of the distance between the object under test and the laser ranging module 100.

[0052] The reflector 60 can be a reflector or a prism, depending on the optical path design requirements, in order to achieve precise reflection and path adjustment of the beam.

[0053] In some embodiments, the reflector 60 is also connected to an adjustment mechanism (not shown), which is used to adjust the angle and position of the reflector 60, thereby achieving precise control over the beam emission and reception paths and ensuring that the laser ranging module 100 can measure objects at different positions. By setting the adjustment mechanism, it is possible to flexibly adapt to the needs of different measurement scenarios, improving the applicability and measurement accuracy of the laser ranging module 100. The adjustment mechanism can be manually or electrically adjusted, depending on the actual application scenario.

[0054] This application also provides an embodiment of a laser rangefinder, which includes the laser ranging module 100. For the specific structure and function of the laser ranging module 100, please refer to the above embodiments; they will not be repeated here.

[0055] In some embodiments, in addition to the laser ranging module 100, the laser rangefinder also includes a support frame for supporting the laser ranging module 100, a data processing unit for data processing, and a power management system for power supply.

[0056] This application also provides an embodiment of a cleaning device, which includes the aforementioned laser rangefinder. The specific structure and function of the laser rangefinder can be found in the above embodiments and will not be repeated here. The laser rangefinder is mounted on the main body of the cleaning device and is used for precise measurement and positioning of the cleaning device's operating path, thereby achieving efficient coverage of the cleaning area and obstacle recognition. The cleaning device acquires environmental data in real time through the laser rangefinder and dynamically optimizes the cleaning path using a built-in algorithm, further improving cleaning efficiency and intelligence. Furthermore, the laser rangefinder can also assist the cleaning device in achieving automatic obstacle avoidance and boundary recognition functions, effectively preventing accidents such as collisions or falls during operation. Through high-precision environmental modeling and data feedback, the cleaning device can more intelligently plan the cleaning area, achieving diverse functions such as zoned cleaning and targeted cleaning.

[0057] It should be noted that while preferred embodiments of this application are provided in the specification and accompanying drawings, this application can be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are not intended to impose additional limitations on the content of this application; their purpose is to provide a more thorough and comprehensive understanding of the disclosure of this application. Furthermore, the above-described technical features can be combined with each other to form various embodiments not listed above, all of which are considered to be within the scope of this application's specification. Moreover, those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. A laser ranging module, characterized in that, include: The system includes a transmitting component, a receiving component, and a light receiver; the transmitting component is used to emit a light beam; the receiving component includes a receiving lens and a reflective film; the receiving lens is disposed in the optical path of the light beam reflected by the object being measured, the reflective film is disposed in the optical path of the light beam converged by the receiving lens and is attached to the upper surface of the bottom of the laser ranging module, and the light receiver is disposed in the optical path of the light beam reflected by the reflective film, and the light receiver is used to receive the light beam reflected by the reflective film.

2. The laser ranging module according to claim 1, characterized in that, The laser ranging module further includes a lens barrel, in which at least a portion of the emitting component and the light receiver are housed; the lens barrel has a first opening and a second opening disposed opposite to each other, the first opening being located in the optical path of the light beam emitted by the emitting component, and the second opening being disposed in the optical path of the light beam reflected by the reflective film.

3. The laser ranging module according to claim 2, characterized in that, The lens barrel is black, and the receiving lens is transparent.

4. The laser ranging module according to claim 2 or 3, characterized in that, The receiving lens is injection molded into the lens barrel, with a portion of the receiving lens surrounding the lens barrel and the other portion of the receiving lens located at the second opening.

5. The laser ranging module according to claim 1, characterized in that, The laser ranging module also includes a circuit board, on which the transmitting component and / or the optical receiver are disposed.

6. The laser ranging module according to claim 5, characterized in that, The circuit board has a first surface and a second surface disposed opposite to each other along a first direction. The emitting component is disposed on the first surface, the light receiver is disposed on the second surface, and the reflective film is disposed at a distance from the light receiver along the first direction.

7. The laser ranging module according to claim 6, characterized in that, The emitting assembly includes a light emitter and an emitting lens. The light emitter is used to emit a light beam and is disposed on the first surface. The emitting lens is located in the optical path of the light beam emitted by the light emitter.

8. The laser ranging module according to claim 5, characterized in that, The laser ranging module also includes a bracket, and the circuit board and the receiving component are disposed on the bracket.

9. The laser ranging module according to claim 8, characterized in that, The bracket includes a body portion and a recessed portion, the body portion being disposed around the recessed portion, the circuit board being mounted on the body portion, and at least a portion of the receiving component being accommodated in the recessed portion.

10. The laser ranging module according to claim 1, characterized in that, The laser ranging module further includes a reflector; the reflector is located in the optical path of the beam emitted by the emitting component, and the reflector is used to reflect the beam emitted by the emitting component to the object under test; the reflector is located in the optical path of the beam reflected by the object under test, and the reflector is used to reflect the beam reflected by the object under test to the receiving component.

11. A laser rangefinder, characterized in that, Includes the laser ranging module as described in any one of claims 1-10.

12. A cleaning device, characterized in that, Including the laser rangefinder as described in claim 11.

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