Suction nozzle and cleaning device

Abstract

Disclosed is a suction nozzle, which includes a suction nozzle body and a sealing ring. One end of the suction nozzle body is provided with a suction port, and the other end of the suction nozzle body is provided with a drainage port. A drainage channel communicating with the suction port and the drainage port is formed inside the suction nozzle body. The drainage port is configured to communicate with the sewage tank of a cleaning device. The suction nozzle body is configured to be rotatably installed to the device body of the cleaning device so as to have a working position that maintains the suction port fitting a surface to be cleaned. The sealing ring is provided at the drainage port, configured to seal a fitting clearance between the suction nozzle body and the sewage tank and capable of elastically deforming.

What is claimed is: 
     
         1 . A suction nozzle, applied to a cleaning device, wherein the cleaning device comprises a device body, and the device body comprises a sewage tank; the suction nozzle comprises:
 a suction nozzle body, wherein one end of the suction nozzle body is provided with a suction port, and the other end of the suction nozzle body is provided with a drainage port; a drainage channel communicating with the suction port and the drainage port is formed inside the suction nozzle body; the drainage port is configured to communicate with the sewage tank; the suction nozzle body is configured to be rotatably installed to the device body so as to have a working position that maintains the suction port fitting a surface to be cleaned; and   a sealing ring provided at the drainage port, configured to seal a fitting clearance between the suction nozzle body and the sewage tank, and capable of elastically deforming.   
     
     
         2 . The suction nozzle according to  claim 1 , wherein a rotational connection position between the suction nozzle body and the device body is configured to be adjacent to the drainage port; a distance between the drainage port and the rotational connection position is defined as L 1 , and a distance between the suction port and the rotational connection position is defined as L 2 ; L 2  is greater than L 1 . 
     
     
         3 . The suction nozzle according to  claim 2 , wherein L 2  is greater than or equal to three times of L 1  and less than or equal to thirty times of L 1 . 
     
     
         4 . The suction nozzle according to  claim 1 , wherein a periphery of the suction port is provided with a guide slope, and the guide slope is obliquely extended upwards in a direction away from the suction port. 
     
     
         5 . The suction nozzle according to  claim 1 , wherein a first elastic member is connected between the suction nozzle body and the device body, and the suction nozzle body is maintained in the working position under an action of the first elastic member. 
     
     
         6 . The suction nozzle according to  claim 5 , wherein the first elastic member is configured as a compression spring, and the first elastic member is located above the rotational connection position between the suction nozzle body and the device body and located at a side of the rotational connection position away from the suction nozzle body; in a compressed state, the first elastic member is configured to incline downwards in a direction close to the rotational connection position. 
     
     
         7 . The suction nozzle according to  claim 1 , further comprising:
 an installation member;   wherein the installation member is provided with an accommodation recess; an end of the suction nozzle body that is provided with the drainage port is arranged in the accommodation recess; the suction nozzle body is rotatably connected to the installation member; the suction nozzle body and the accommodation recess are provided with a movement clearance in a vertical direction and a horizontal direction.   
     
     
         8 . The suction nozzle according to  claim 7 , wherein two opposite side walls of the accommodation recess are both provided with a guide groove; the guide groove is extended upwards in the vertical direction; two opposite outer side walls of the suction nozzle body are both provided with a rotation shaft; one rotation shaft is rotatably inserted in one guide groove, and is configured to slide along an extension direction of a corresponding guide groove. 
     
     
         9 . The suction nozzle according to  claim 8 , wherein an upper side of the suction nozzle body is connected with a second elastic member, and the suction nozzle body has a tendency to move downwards under an action of the second elastic member. 
     
     
         10 . The suction nozzle according to  claim 9 , wherein a plurality of second elastic members are provided, and one second elastic member is correspondingly provided above one rotation shaft and abutted against the rotation shaft; and/or
 at least one second elastic member is further provided in a middle of the two rotation shafts and abutted against the suction nozzle body.   
     
     
         11 . The suction nozzle according to  claim 7 , wherein two ends of the sealing ring are configured as a first end and a second end;
 an inner peripheral side of the first end is provided with a first ring groove, an outer peripheral side of the drainage port is provided with a first ring protrusion, and the first ring protrusion is tightly clamped in the first ring groove; and/or   an outer peripheral side of the second end is provided with a second ring groove, and the installation member is provided with a passage facing the drainage port; a periphery of the passage is provided with a second ring protrusion, and the second ring protrusion is tightly clamped in the second ring groove.   
     
     
         12 . The suction nozzle according to  claim 1 , wherein the nozzle body comprises a body part and an installation head; the drainage port is provided at the installation head, and a position where the body part and the installation head are connected is provided with a sealing gasket; the sealing gasket is accommodated and clamped between the installation head and the body part, and the body part is detachably connected to the installation head. 
     
     
         13 . The suction nozzle according to  claim 12 , wherein the installation head is provided with an installation opening, a periphery of the installation opening is provided with a buckle, and the body part is clamped to the buckle. 
     
     
         14 . A cleaning device, comprising a device body and the suction nozzle according to  claim 1 , wherein the drainage port is communicated with the sewage tank of the device body.