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EP-3399337-B1 - LASER RANGING DEVICE AND AUTOMATIC CLEANING DEVICE

EP3399337B1EP 3399337 B1EP3399337 B1EP 3399337B1EP-3399337-B1

Inventors

  • WAN, Yunpeng
  • XIA, Yongfeng

Dates

Publication Date
20260506
Application Date
20161207

Claims (9)

  1. A laser ranging device, comprising: an encoded chassis (11) comprising a rotary bin (111) and a plurality of ranging teeth (112) disposed at intervals on the periphery of the rotary bin (111); a rotary disc (12) that is mounted within the encoded chassis (11) and is rotatable within the rotary bin (111) when the rotary disc (12) is driven; and a first barrier ring (121) disposed on the rotary disc (12) and a second barrier ring (113) that is disposed on the encoded chassis (11); wherein the first barrier ring (121) is disposed at the edge of the bottom surface of the rotary disc (12), the second barrier ring (113) is disposed on the periphery of the ranging teeth (112); after the rotary disc (12) is mounted to the encoded chassis (11), the first barrier ring (121) is located at the periphery of the ranging teeth (112), the first barrier ring (121) extends from the rotary disc (12) to the encoded chassis (11), to guide water to the periphery of the encoded chassis (11), characterized in that the second barrier ring (113) is located between the first barrier ring (121) and the ranging teeth (112), projections of the first barrier ring (121) and the second barrier ring (113) on a vertical plane are at least partially overlapped, wherein the encoded chassis (11) further comprises at least one slot (114) disposed thereon, and the at least one slot (114) is disposed outside of the ranging teeth (112), wherein the encoded chassis (11) further comprises a first water guidance protrusion disposed at a position on the bottom surface of the encoded chassis (11) corresponding to the at least one slot (114), and the first water guidance protrusion is configured to guide water and dust to flow downward.
  2. The laser ranging device according to claim 1, wherein a gap exists between the first barrier ring (121) and the encoded chassis (11), and a second gap exists between the second barrier ring (113) and the rotary disc (12).
  3. The laser ranging device according to claim 1, wherein the encoded chassis (11) further comprises a drive bin adjacent to the rotary bin (111), and the encoded chassis (11) further comprises thereon a water-dust-proof wall (115) disposed between the rotary bin (111) and the drive bin.
  4. The laser ranging device according to claim 3, wherein the encoded chassis (11) further comprises a recess (116) adjacent to the water-dust-proof wall (115), the recess (116) and the rotary bin (111) are located respectively at two sides of the water-dust-proof wall (115), and a guidance hole (1161) exists on the bottom surface of the recess (116).
  5. The laser ranging device according to claim 4, wherein the encoded chassis (11) further comprises a second water guidance protrusion disposed on the bottom surface of the encoded chassis (11) and corresponding to the guidance hole (1161).
  6. The laser ranging device according to claim 1, further comprising: a driving means disposed on the bottom surface of the encoded chassis (11) with a drive shaft of the driving means running through the encoded chassis, wherein the encoded chassis (11) further comprises thereon a third barrier ring (117) disposed on the circumference of the drive shaft.
  7. The laser ranging device according to claim 6, wherein the encoded chassis (11) further comprises thereon a connecting portion (118) for connecting the encoded chassis to the driving means, and a waterproof protrusion (119) is disposed on the circumference of the connecting portion (118).
  8. The laser ranging device according to claim 1, further comprising a ranging component (13) mounted to the rotary disc (12) and an upper cover (14) mounted on the encoded chassis (11), wherein the rotary disc (12) and the ranging component (13) are located between the upper cover (14) and the encoded chassis (11).
  9. An automatic cleaning device, comprising a machine body and the laser ranging device according to any one of claims 1-8, which is provided in the machine body.

Description

TECHNICAL FIELD The present invention relates to the field of laser ranging technology, particularly to a laser ranging device which is waterproof and dustproof, and more particularly to a laser ranging device for an automatic cleaning device. BACKGROUND Measurement and measurement units have been constantly evolving with dynasty change since ancient times, and finally unified to worldwide standard units throughout counties all over the world. In old days, measurement of distance was made by rulers. However, it was a challenge to measure a long distance with a ruler. With the development of technology, ranging devices with laser has been developed. At present, as demand for multi-directional laser ranging is ever increasing, rotation ranging method has been widely employed. However, in the related art, a laser ranging device is not waterproof and dustproof, and accumulation of dust over time may block the view of the ranging component and cause the ranging component to fail in measurement or may reduce accuracy of measured data. In other cases, when water gets into the laser ranging device, water may drip onto the circuit board of the laser ranging device, resulting in short circuit and even burning the circuit board, such that the laser ranging device cannot work properly. WO 2015/074594 discloses a laser range finding sensor comprising an encoded chassis with a rotary bin and a plurality of ranging teeth disposed at intervals on the periphery of the rotary bin. Further, the laser ranging device comprises a rotary disc that is mounted within the encoded chassis and is rotatable within the rotary bin when the rotary disc is driven. SUMMARY In order to solve the above technical problem, the present invention provides a laser ranging device and an automatic cleaning device, which has waterproof and dustproof design. In order to achieve the above object, the technical solution of the present invention is as follows. According to a first aspect of the embodiments of the present invention, there is provided a laser ranging device, including: an encoded chassis including a rotary bin and a plurality of ranging teeth disposed at intervals on the periphery of the rotary bin;a rotary disc that is mounted within the encoded chassis and is rotatable within the rotary bin when the rotary disc is driven; anda first barrier ring disposed on the rotary disc;wherein the first barrier ring is disposed at the edge of the bottom surface of the rotary disc and is located at the periphery of the ranging teeth after the rotary disc is mounted to the encoded chassis. The laser ranging device further includes a first barrier ring and a second barrier ring, wherein the second barrier ring is disposed on the periphery of the ranging teeth and located between the first barrier ring and the ranging teeth after the rotary disc is mounted to the encoded chassis. Projections of the first barrier ring and the second barrier ring on a vertical plane are at least partially overlapped. Optionally, a gap exists between the first barrier ring and the encoded chassis, and a second gap exists between the second barrier ring and the rotary disc. The encoded chassis further includes at least one slot disposed thereon, and the at least one slot is disposed on outer edge of the ranging teeth. The encoded chassis further includes a first water guidance protrusion disposed at a position on the bottom surface of the encoded chassis corresponding to the at least one slot. Optionally, the encoded chassis further includes a drive bin adjacent to the rotary bin, and the encoded chassis further includes thereon a water-dust-proof wall disposed between the rotary bin and the drive bin. Optionally, the encoded chassis further includes a recess adjacent to the water-dust-proof wall, the recess and the rotary bin are located respectively at two sides of the water-dust-proof wall, and a guidance hole exists on the bottom surface of the recess. Optionally, the encoded chassis further includes a second water guidance protrusion disposed on the bottom surface of the encoded chassis and corresponding to the guidance hole. Optionally, the laser ranging device further includes: a driving means disposed on the bottom surface of the encoded chassis with a drive shaft of the driving means running through the encoded chassis, wherein the encoded chassis further comprises thereon a third barrier ring disposed on the circumference of the drive shaft. Optionally, the encoded chassis further includes thereon a connecting portion for connecting the encoded chassis to the driving means, and a waterproof protrusion is disposed on the circumference of the connecting portion. Optionally, the laser ranging device further includes: a ranging component mounted to the rotary disc and an upper cover mounted on the encoded chassis, wherein the rotary disc and the ranging component are located between the upper cover and the encoded chassis. According to a second aspect of the embodiment