CN217013824U

CN217013824U - Laser rangefinder and robot of sweeping floor

Info

Publication number: CN217013824U
Application number: CN202123431865.8U
Authority: CN
Inventors: 赵琦; 李昂; 郭盖华
Original assignee: Shenzhen LD Robot Co Ltd
Current assignee: Shenzhen LD Robot Co Ltd
Priority date: 2021-12-30
Filing date: 2021-12-30
Publication date: 2022-07-22
Anticipated expiration: 2031-12-30

Abstract

The utility model is suitable for the field of distance measuring equipment, and provides a laser distance measuring device and a sweeping robot. Wherein, laser rangefinder includes: a distance measurement module; the driving module comprises a driving piece, a first driving wheel, a second driving wheel and a driving belt wound on the first driving wheel and the second driving wheel, the driving piece of the driver is connected with the first driving wheel, the distance measuring module is connected with the second driving wheel, and the driving piece of the driver drives the first driving wheel to rotate and drives the second driving wheel and the distance measuring module to rotate by utilizing the driving belt; the shell comprises a base and a first light-transmitting outer cover, the base is fixedly connected with the first light-transmitting outer cover, the base and the first light-transmitting outer cover enclose a first accommodating cavity, and the distance measuring module, the first transmission wheel, the second transmission wheel and the transmission belt are accommodated in the first accommodating cavity. The laser ranging device provided by the utility model has the advantages that the ranging function of the ranging module can be realized, the structure is simplified, and the waterproof performance of the laser ranging device is improved.

Description

Laser rangefinder and robot of sweeping floor

Technical Field

The utility model belongs to the field of distance measuring equipment, and particularly relates to a laser distance measuring device and a sweeping robot.

Background

A floor sweeping robot, also known as an automatic sweeper, a robot cleaner, etc., is one of intelligent household appliances, and can automatically complete floor cleaning work in a room by means of certain artificial intelligence. In order to enable the sweeping robot to efficiently and reasonably sweep in an unknown environment, a scheme of arranging a ranging module in the sweeping robot is generally adopted in the industry, and generally, the sweeping robot can realize the positioning and navigation of the sweeping robot through the ranging module so as to sweep according to a reasonable path.

The distance measurement module includes laser emission unit and laser receiving element, and laser emission unit outwards launches laser, gets into the robot surrounding environment of sweeping the floor, and when the barrier was touched to laser, for example when article such as table chair supporting leg, sofa, cupboard, laser reflection, the laser of reflection partly got into in the robot of sweeping the floor and was caught by laser receiving element, through survey laser from the time of launching to receiving, can calculate the distance of distance measurement module to the barrier in the surrounding environment.

In the existing design, the laser emission unit and the laser receiving unit are fixed on a turntable, and the protective cover covers one side of the laser emission unit and the laser receiving unit, which deviates from the turntable, and is fixed on the turntable through a supporting piece. The protective cover rotates along with the turntable. A gap is reserved between the protective cover and the base where the rotary disc is located, so that the rotating resistance of the protective cover is reduced, and more importantly, the blocking of the laser entering and exiting can be avoided due to the arrangement of the gap. However, the existence of the gap makes the structure difficult to be waterproof, and liquid easily flows into the structure along the gap, so that the probability of the fault of the ranging module is increased.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects of the prior art and provides a laser ranging device and a sweeping robot, and aims to improve the waterproof capability of the laser ranging device and reduce the equipment failure probability.

A laser ranging device comprising:

the distance measurement module comprises a laser transmitting unit and a laser receiving unit, and the laser receiving unit receives a laser signal which is transmitted by the laser transmitting unit and reflected by an obstacle;

the driving module comprises a driving piece, a first driving wheel, a second driving wheel and a driving belt wound on the first driving wheel and the second driving wheel, the driving piece is connected with the first driving wheel, the distance measuring module is connected with the second driving wheel, and the driving piece drives the first driving wheel to rotate and drives the second driving wheel and the distance measuring module to rotate by utilizing the driving belt;

the shell comprises a base and a first light-transmitting outer cover, the base is fixedly connected with the first light-transmitting outer cover, the base and the first light-transmitting outer cover enclose a first accommodating cavity, and the distance measuring module is accommodated in the first accommodating cavity.

Optionally, first printing opacity dustcoat includes parallel arrangement's first cover plate and second cover plate, and connects first cover plate with the bounding wall of second cover plate, the bounding wall first cover plate with the base encloses to close and forms first installation room, the second drive wheel with ranging module is located in the first installation room, the second cover plate is connected the bounding wall is close to one side of first drive wheel, the second cover plate with the base encloses to close and forms the second installation room, first drive wheel is located in the second installation room.

Optionally, a support member is disposed between the first mounting chamber and the second mounting chamber, and is used for supporting the first light-transmitting enclosure.

Optionally, the casing still includes the second dustcoat, the second dustcoat can dismantle connect in the base deviates from one side of first printing opacity dustcoat, the second dustcoat with the base encloses into second holding chamber, the driving piece is located in second holding chamber.

Optionally, the first light-transmitting outer cover or/and the second outer cover is/are provided with heat dissipation holes, and waterproof breathable films are arranged at the heat dissipation holes.

Optionally, a first waterproof sealing member is arranged on the base, and the first waterproof sealing member is arranged between the first light-transmitting outer cover and the base.

Optionally, an annular first accommodating groove is formed in a surface of the base, which is abutted to the first light-transmitting outer cover, and when the first light-transmitting outer cover is fixedly connected to the base, the first waterproof seal is compressed in the first accommodating groove.

Optionally, an annular second accommodating groove is formed in the surface of the base, which is abutted to the second outer cover, a second sealing waterproof piece is arranged in the second accommodating groove, and when the second outer cover is tightly connected to the base, the second sealing waterproof piece is compressed in the second accommodating groove.

A sweeping robot comprises a sweeping robot body and the laser distance measuring device.

Optionally, the laser ranging device protrudes out of the sweeping robot body.

The application provides beneficial effect lies in: compared with the prior art, the laser ranging device and the sweeping robot adopting the laser ranging device ensure that the ranging module can receive laser and emit the laser outwards through the arrangement of the light-transmitting area of the first light-transmitting outer cover, so that the ranging function is realized; the waterproof performance of the laser ranging device is improved through the tight connection design of the first light-transmitting outer cover and the base, and the fault probability of the laser ranging device is further reduced; the first light-transmitting housing is directly connected with the base without an additional support structure to simplify the structure.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic overall structure diagram of a laser distance measuring device according to an embodiment of the present disclosure;

fig. 2 is a schematic structural disassembly view of a laser distance measuring device according to an embodiment of the present disclosure;

fig. 3 is a schematic structural disassembly view of a housing in a laser ranging device according to an embodiment of the present application.

Wherein, in the figures, the various reference numbers:

100. a laser ranging device; 10. a housing; 11. a base; 111. a support member; 12. a first light-transmissive outer cover; 121. a first cover plate; 122. a second cover plate; 123. enclosing plates; 13. a second housing; 14. a first waterproof seal member; 15. a second waterproof seal; 101. heat dissipation holes; 102. a first accommodating groove; 21. a distance measurement module; 22. a drive member; 23. a first drive pulley; 24. a second transmission wheel; 25. and (4) a transmission belt.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

It will be understood that the terms "length," "width," "upper," "lower," "inner," "outer," and the like, as used herein, refer to an orientation or positional relationship illustrated in the drawings for convenience in describing the present application and to simplify description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered limiting of the present application.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

Referring to fig. 1 to 3, the present application provides a laser ranging device 100, which includes a housing 10, and a ranging module 21, a driving module and a control module disposed in the housing 10.

The distance measuring module 21 includes a laser emitting unit and a laser receiving unit, and the laser receiving unit receives a laser signal emitted by the laser emitting unit and reflected by an obstacle.

The driving module comprises a driving part 22, a first driving wheel 23, a second driving wheel 24 and a driving belt 25 wound on the first driving wheel 23 and the second driving wheel 24, the driving part 22 is connected with the first driving wheel 23, the distance measuring module 21 is connected with the second driving wheel 24, and the driving part 22 drives the first driving wheel 23 to rotate and drives the second driving wheel 24 and the distance measuring module 21 to rotate by using the driving belt 25. It will be appreciated that the control module is arranged to control the operation of the drive member 22 and the ranging module 21.

The housing 10 includes a base 11 and a first light-transmissive cover 12, the first light-transmissive cover 12 is fixedly connected to the base 11, and preferably, the first light-transmissive cover 12 is detachably and fixedly connected to the base 11. The base 11 and the first light-transmitting outer cover 12 enclose to form a first accommodating cavity, and the ranging module 21, the first driving wheel 23, the second driving wheel 24 and the driving belt 25 are accommodated in the first accommodating cavity.

The housing 10 provides support and protection for the ranging module, the drive module and the control module. In this embodiment, the housing 10 includes a base 11 and a first light-transmissive cover 12, and the base 11 and the first light-transmissive cover 12 are detachably connected. When base 11 and first printing opacity dustcoat 12 are connected, be the zonulae occludens state to avoid impurity such as liquid or dust to get into inside casing 10 from the juncture of base 11 and first printing opacity dustcoat 12, thereby improve laser rangefinder 100's waterproof, dustproof and antiwind performance, and then reduce the probability that laser rangefinder 100 broke down.

The first light-transmissive outer cover 12 is made of a light-transmissive material. The first light-transmissive housing 12 is made of a light-transmissive material to allow the laser light emitted from the ranging module 21 to pass therethrough. In this embodiment, the distance measuring module 21 emits infrared light, and the transparent material allows the infrared light to pass through. The light-transmitting material may be an inorganic light-transmitting material, a polymer light-transmitting material, a light-transmitting composite material, etc., and those skilled in the art may select the existing light-transmitting material according to actual needs, such as glass, polymethyl methacrylate (PMMA), styrene acrylonitrile copolymer (SAN), etc., which is not limited herein.

The laser emitting unit emits laser outwards through the light transmitting area of the first light transmitting outer cover 12, a laser signal of the laser reflected by the obstacle enters the inside of the shell 10 through the light transmitting area of the first light transmitting outer cover 12 and is received by the laser receiving unit, and the distance from the laser ranging device 100 to the obstacle can be calculated through a flight time method, a phase method or a triangular ranging method. By the above, the light-transmitting arrangement of the first light-transmitting housing 12 enables the ranging module 21 to emit and receive laser light through the light-transmitting area, so as to ensure the normal operation of the function of the laser ranging device 100.

In addition, the base 11 is detachably and fixedly connected with the first light-transmitting housing 12, and is tightly connected. The surface of the base 11 facing the first light-transmitting housing 12 is closely abutted against the first light-transmitting housing 12, so that the effect of supporting the first light-transmitting housing 12 is achieved, and no additional supporting structure is required.

In summary, the laser distance measuring device 100 and the sweeping robot using the laser distance measuring device 100 provided in this embodiment ensure that the distance measuring module 21 can emit and receive laser outwards through the arrangement of the first light-transmitting housing 12, so as to realize the function of distance measurement; the tight connection design of the first light-transmitting outer cover 12 and the base 11 is adopted to improve the waterproof, dustproof and anti-winding performances of the laser ranging device 100, so that the failure probability of the laser ranging device 100 is reduced; the first light-transmissive housing 12 is directly connected to the base 11 without an additional support structure to simplify the structure.

It should be noted that, in this embodiment, the laser distance measuring device 100 is manufactured and sold as an independent device, and can be integrally used as an assembly component in a sweeping robot or other equipment. When the laser distance measuring device 100 provided by this embodiment is applied to a sweeping robot, the laser distance measuring device 100 protrudes from the sweeping robot body to prevent the sweeping robot body from blocking laser emitted by the distance measuring module 21. In other embodiments, the laser distance measuring device 100 may also be a functional structure built in a sweeping robot or other equipment, in this case, the housing 10 of the laser distance measuring device 100 is a part of a supporting structure of the sweeping robot, and the supporting and protecting of the laser distance measuring device 100 is only one of multiple functions of the housing 10. For example, the laser ranging device 100 and other functional components of the sweeping robot share one base 11.

Referring to fig. 2, the driving module includes a driving member 22, a first driving wheel 23, a second driving wheel 24, and a driving belt 25 wound around the first driving wheel 23 and the second driving wheel 24, the driving member 22 is connected to the first driving wheel 23, the distance measuring module 21 is connected to the second driving wheel 24, and the driving member 22 drives the first driving wheel 23 to rotate and drives the second driving wheel 24 and the distance measuring module 21 to rotate by using the driving belt 25.

The drive member 22 may be an electric motor. The output shaft of the driving member 22 is directly connected to the first driving wheel 23 or indirectly connected to the first driving wheel 23 through a transmission structure such as a transmission shaft and a gear pair, and drives the first driving wheel 23 to rotate. In the configuration shown in fig. 2, the output shaft of the motor passes through the base 11 and is directly connected to the first driving wheel 23 to drive the first driving wheel 23 to rotate. The first transmission wheel 23 and the second transmission wheel 24 are belt wheels, the transmission belt 25 is wound around the first transmission wheel 23 and the second transmission wheel 24, and when the first transmission wheel 23 rotates, the transmission belt 25 rotates to drive the second transmission wheel 24 to rotate. The distance measuring module 21 is fixed on the second transmission wheel 24 and rotates synchronously with the second transmission wheel 24.

Through the arrangement of the transmission belt 25, the first transmission wheel 23 and the second transmission wheel 24, the motor can be separated from the ranging module 21 and the installation position can be adjusted according to actual requirements, so that the arrangement of all structures is facilitated.

In another embodiment of the present application, referring to fig. 2 and fig. 3, the housing 10 further includes a second outer cover 13, the second outer cover 13 is detachably connected to a side of the base 11 away from the first light-transmitting outer cover 12, the second outer cover 13 and the base 11 enclose to form a second accommodating cavity, and the driving member 22 is located in the second accommodating cavity.

The driving member 22 is located in the second accommodating cavity, and the distance measuring module 21 is located in the first accommodating cavity, that is, the driving member 22 and the distance measuring module 21 are located at two sides of the base 11. This setting can avoid the condition of driving piece 22 to the sheltering from of ranging module 21 laser when driving piece 22 is located the same side of base 11 with ranging module 21.

In another embodiment of the present application, referring to fig. 3, the first light-transmitting housing 12 includes a first cover plate 121 and a second cover plate 122 disposed in parallel, and a surrounding plate 123 connecting the first cover plate 121 and the second cover plate 122, the surrounding plate 123, the first cover plate 121 and the base 11 enclose to form a first installation chamber, the second driving wheel 24 and the distance measuring module 21 are located in the first installation chamber, the second cover plate 122 connects one side of the surrounding plate 123 close to the first driving wheel 23, the second cover plate 122 encloses with the base 11 to form a second installation chamber, and the first driving wheel 23 is accommodated in the second installation chamber; the first installation chamber and the second installation chamber are both located in the first containing cavity.

Referring to fig. 2 and 3, a first cover plate 121 is disposed above the distance measuring module 21 for covering the distance measuring module 21 and the second driving wheel 24, and a second cover plate 122 is disposed above the first driving wheel 23 for covering the first driving wheel 23. In this embodiment, the shroud 123 is cylindrical such that the first mounting chamber is cylindrical. The central line of bounding wall 123 overlaps with the axis of rotation of second drive wheel 24 for ranging module 21 no matter what position is rotated to, its distance with bounding wall 123 is all the same, thereby is favorable to guaranteeing the accuracy of ranging module 21 range finding.

The first cover plate 121, the second cover plate 122 and the shroud plate 123 are integrally formed. In other words, the first light transmissive outer cover 12 is a single structural member. This setting can improve the connection fastenability between first cover plate 121, second cover plate 122 and the bounding wall 123, avoids liquid to flow into first holding chamber through the handing-over department of first cover plate 121, second cover plate 122 and bounding wall 123. In addition, assembly is facilitated because the first light transmissive enclosure 12 is a single structural member.

In another embodiment of the present application, referring to fig. 2, a support member 111 is disposed between the first and second installation chambers for supporting the first light-transmissive cover 12. It will be appreciated that the support 111 has relief holes for the belt 25 to pass through. The support 111 and the base 11 together provide support for the first light-transmitting housing 12, so as to improve the capability of the first light-transmitting housing 12 to resist external force.

In another embodiment of the present application, an end of the enclosing plate 123 facing away from the first housing plate 121 does not protrude from the second housing plate 122, so that a surface of the first light-transmitting housing 12 abutting against the base 11 is a single flat surface. The lower surface of the first light-transmitting housing 12 (the surface of the first light-transmitting housing 12 facing the base 11) is a flat surface abutting against the base 11, and is a single flat surface. With this arrangement, the first light-transmissive cover 12 is slightly displaced from the mounting position during mounting without affecting its tightness with respect to the base 11. From this viewpoint, this arrangement can improve the convenience of assembly, securing the tightness of the first light-transmitting housing 12 with the base 11.

In another embodiment of the present application, referring to fig. 3, a first waterproof sealing member 14 is disposed on the base 11, and the first waterproof sealing member 14 is disposed between the first light-transmitting housing 12 and the base 11. The waterproof sealing effect between the base 11 and the first waterproof seal 14 is improved by the arrangement of the first waterproof seal 14. In the structure shown in fig. 3, a first accommodating groove 102 for accommodating the first waterproof seal 14 is formed on the surface of the base 11 abutting against the first light-transmitting housing 12, and when the first light-transmitting housing 12 is connected to the base 11, the first waterproof seal 14 is compressed in the first accommodating groove 102. The first receiving groove 102 provides a positioning and limiting function for the first waterproof seal 14. In other embodiments, the first receiving groove 102 may also be formed on a surface of the first light-transmitting housing 12 facing the base 11, or both the base 11 and the first light-transmitting housing 12 have blind holes, and the first receiving groove 102 is formed by enclosing the blind holes of the base 11 and the first light-transmitting housing 12. In other embodiments, the first container 102 may not be provided, and the first waterproof seal 14 may be directly clamped between the base 11 and the first light-transmitting housing 12.

The first watertight seal 14 is an elastic member, such as a rubber ring. When the first waterproof seal 14 is naturally placed in the accommodating groove, the upper surface thereof protrudes from the notch of the first accommodating groove 102. When the first light-transmitting housing 12 is connected to the base 11, the first light-transmitting housing 12 presses the first waterproof seal 14 to press the first waterproof seal 14 into the first receiving groove 102. The upper and lower surfaces of the first waterproof sealing member 14 are respectively abutted against the first light-transmitting housing 12 and the base 11 to block the passage of impurities, thereby achieving the effect of tight connection. By adopting the design of the first accommodating groove 102 and the first waterproof seal 14, the structure is simplified while tight connection is realized.

In another embodiment of the application, the base 11 is further provided with a second sealing and waterproofing member 15, the second sealing and waterproofing member 15 being provided between the second cover 13 and the base 11. Through the setting of second waterproof seal 15, improve the waterproof seal effect of base 11 and second waterproof seal 15.

In this embodiment, the base 11 has a second annular receiving groove formed on a surface thereof abutting against the second housing 13, and when the second housing 13 is connected to the base 11, the second waterproof seal 15 is compressed in the second receiving groove. In other embodiments, the second receiving groove may also be formed in a surface of the second housing 13 facing the base 11, or both the base 11 and the second housing 13 are provided with blind holes, and the blind holes of the base 11 and the second housing 13 surround to form the second receiving groove. The second receiving groove provides positioning and limiting functions for the second waterproof seal 15. In other embodiments, the second waterproof seal 15 may be directly clamped between the second cover 13 and the base 11 without providing the second receiving groove.

The second watertight sealing member 15 is an elastic member, such as a rubber ring. When the second waterproof sealing member 15 is naturally placed in the second receiving groove, the lower surface thereof protrudes from the notch of the second receiving groove. When the second cover 13 is connected to the base 11, the second cover 13 presses the second waterproof seal 15 to press the second waterproof seal 15 into the second receiving groove. The upper and lower surfaces of the second waterproof seal 15 are respectively abutted against the base 11 and the second housing 13 to block the passage of impurities, thereby achieving the effect of tight connection. The design of the second accommodating groove and the second waterproof sealing part 15 is adopted, so that the structure is simplified while tight connection is realized.

In another embodiment of the present application, the base 11 and the first light-transmissive outer cover 12 are screwed by screws. The surface of the base 11 facing the first light-transmitting housing 12 is provided with a screw hole, and the screw hole is a blind hole. The screw passes through the first light-transmitting housing 12 and is screwed with the screw hole. Because the screw hole is a blind hole and is not communicated with the first accommodating cavity, even if liquid reaches the screw hole through a screw, the liquid cannot enter the first accommodating cavity through the screw hole, and therefore the tight connection between the first light-transmitting outer cover 12 and the base 11 is guaranteed.

In another embodiment of the application, the base 11 and the second cover 13 are connected by fasteners, and the connection positions of the base 11, the second cover 13 and the fasteners are located outside the second seal flashing 15. Under this setting, the base 11 and the second cover 13 are provided with connecting holes matched with the fasteners and located outside the second waterproof sealing member 15, so that the risk that water vapor enters the housing 10 due to the holes being formed in the range of the second waterproof sealing member 15 is avoided.

In another embodiment of the present application, the first light-transmitting housing 12 or/and the second housing 13 is provided with a heat dissipation hole 101, and the heat dissipation hole 101 is covered with a waterproof and breathable film. In the structure shown in fig. 3, the heat radiation hole 101 is opened in the second housing 13.

The waterproof breathable film can allow air to pass through while insulating water vapor. The waterproof breathable film covers the heat dissipation holes 101, so that heat generated by the ranging assembly can be discharged out of the shell 10 through the heat dissipation holes 101, and water vapor or liquid outside the shell 10 cannot enter the shell 10 through the heat dissipation holes 101, and a waterproof and heat dissipation effect is achieved.

The application still provides a robot of sweeping the floor, and this robot of sweeping the floor includes laser rangefinder 100, and the concrete structure of laser rangefinder 100 refers to above-mentioned embodiment. Since the sweeping robot adopts all the technical schemes of all the embodiments, all the beneficial effects brought by the technical schemes of the embodiments are also achieved, and are not repeated herein.

The above description is intended to be illustrative of the preferred embodiment of the present invention and should not be taken as limiting the utility model, but rather, the utility model is intended to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the utility model.

Claims

1. A laser ranging device, comprising:

the distance measurement module comprises a laser transmitting unit and a laser receiving unit, wherein the laser receiving unit receives a laser signal which is transmitted by the laser transmitting unit and reflected by an obstacle;

2. The laser distance measuring device of claim 1, wherein the first transparent housing comprises a first housing plate and a second housing plate which are arranged in parallel, and a surrounding plate for connecting the first housing plate and the second housing plate, the surrounding plate, the first housing plate and the base are enclosed to form a first installation chamber, the second driving wheel and the distance measuring module are located in the first installation chamber, the second housing plate is connected with one side of the surrounding plate close to the first driving wheel, the second housing plate and the base are enclosed to form a second installation chamber, and the first driving wheel is located in the second installation chamber.

3. The laser ranging device as claimed in claim 2, wherein a support member is provided between the first mounting chamber and the second mounting chamber for supporting the first light transmissive enclosure.

4. The laser ranging device as claimed in claim 1, wherein the housing further comprises a second housing detachably connected to a side of the base facing away from the first light-transmitting housing, the second housing and the base enclose a second accommodating cavity, and the driving member is located in the second accommodating cavity.

5. The laser ranging device as claimed in claim 4, wherein heat dissipation holes are formed in the first light-transmitting housing or/and the second housing, and waterproof and breathable films are arranged at the heat dissipation holes.

6. A laser rangefinder apparatus according to any of claims 1 to 5 wherein a first seal waterproof member is provided on said base, said first seal waterproof member being provided between said first light transmissive cover and said base.

7. The laser ranging device as claimed in claim 6, wherein the base has a first annular receiving groove formed on a surface thereof abutting against the first light-transmitting housing, and the first waterproof seal is compressed in the first receiving groove when the first light-transmitting housing is fixedly connected to the base.

8. The laser ranging device as claimed in claim 4 or 5, wherein the base has a second annular receiving groove formed on a surface thereof abutting against the second housing, a second waterproof seal is disposed in the second receiving groove, and the second waterproof seal is compressed in the second receiving groove when the second housing is tightly connected to the base.

9. A sweeping robot is characterized by comprising a sweeping robot body and the laser ranging device as claimed in any one of claims 1 to 6.

10. The sweeping robot of claim 9, wherein the laser ranging device protrudes from the sweeping robot body.