CN214678779U - Automatic window cleaner - Google Patents

Abstract

The utility model discloses an automatic window cleaner, which comprises a movable arm, a fixed arm and a rotary cleaning head; the movable arm and the fixed arm are both hollow structures, the left end of the movable arm is sleeved in the fixed arm in a sliding manner, the right end of the movable arm is exposed out of the fixed arm, and the right end of the movable arm is fixedly connected with the rotary cleaning head; the movable arm comprises at least three transmission screw rods, a pressing device and a clamping device, wherein the rightmost screw rod of the at least three transmission screw rods is fixedly connected with the pressing device through a bolt, and the pressing device and the rotary scrubbing head are fixed with each other through a buckle; the fixed arm comprises a main circuit board, a battery pack, a positive and negative rotation motor, a transfer gear and a spring cable which are electrically connected with each other, the positive and negative rotation motor is in transmission connection with the transmission screw rod through the transfer gear, and the spring cable is accommodated in the transmission screw rod and is electrically connected with the rotary scrubbing head; this real novel simple structure that has, low cost can realize that the one hand carries out self-cleaning to outdoor glass face, has stopped the safety risk that high-rise resident family cleaned outdoor glass face completely.

Description

Automatic window cleaner

Technical Field

The utility model relates to a burnisher especially relates to an automatic window cleaner.

Background

Most urban residents live in buildings, windows of the existing buildings are plastic steel windows, the glass area of each window is large, and therefore indoor light is strong and lighting effect is good; however, after the window glass is blown by wind, sun and rain every day and year, dust and mud can adhere to the window glass, and the cleaning work of more than one layer of residents on the window glass, particularly the cleaning of the outside of the window glass room, is dangerous work.

The glass wiper is composed of two sponge wipers, wherein a strong magnet is arranged at the corresponding part of each sponge wiper, one sponge wiper is contacted with the inner surface of the glass of a resident, the other sponge wiper is correspondingly adsorbed on the outer surface of the glass of the resident, and the sponge wipers on the outer surface of the glass are driven to synchronously move by dragging the sponge wipers at the inner surface of the glass, so that the cleaning work of the outer surface of the window glass of the high-rise resident is realized; however, the device also has a great problem that the magnetic force of the magnet cannot be too strong, the magnetic force is too strong, the sponge wiper adsorbed on the inner and outer surfaces of the glass can really clean the inner and outer surfaces of the glass more thoroughly, but the sponge wiper on the outer surface of the glass is hard to remove from the glass easily when the cleaning work is finished because the magnetic force is fixed, when no external force is applied to the outer surface of the glass through the sponge wiper, the stubborn stains can not be cleaned thoroughly, and when the cleaning work is finished, the pair of sponge brushes with too strong magnetic force can not be taken down from the glass easily, so that the operation is inconvenient, and the pair of sponge wipers can not adsorb on the inner and outer surfaces of the glass due to too small magnetic force, so that the work of cleaning the glass can not be finished.

Automatic glass cleaning machines with suckers are also available in the market, wherein the automatic glass cleaning machines are adsorbed on the surface of glass by virtue of strong suckers, slide on the surface of the glass by virtue of universal wheels in rolling contact with the glass, and realize the cleaning work on the surface of the glass by virtue of the sliding friction between moist sponges and the glass in the sliding process; the automatic glass cleaning machine solves the problem that high-rise residents are risky to manually clean glass, but also has the problems of high manufacturing cost and high glass cleaning cost, once a sucker is aged, the machine cannot be tightly adsorbed on the surface of the glass, so that the cleaning work of the glass cannot be finished, and strong stains on the outside of a glass chamber are encountered.

Disclosure of Invention

In order to solve the problem, the utility model provides an automatic window cleaner, it has simple structure, and low cost can realize carrying out self-cleaning to outdoor glass face, and can thoroughly clear away stubborn spot on the external glass face, only needs a people hand to visit out the window external operation, need not to visit out-of-window operation, has stopped high-rise resident family completely and has cleaned the safety risk of outdoor glass face.

The utility model discloses an automatic window cleaner, which comprises a movable arm, a fixed arm and a rotary cleaning head; the movable arm and the fixed arm are both hollow structures, the left end of the movable arm is sleeved in the fixed arm in a sliding manner, the right end of the movable arm is exposed out of the fixed arm, and the right end of the movable arm is fixedly connected with the rotary cleaning head;

the movable arm comprises at least three transmission screw rods and a pressing device, the rightmost screw rod of the at least three transmission screw rods is fixedly connected with the pressing device through a bolt, and the pressing device and the rotary scrubbing head are mutually fixed through a buckle; the at least three transmission screws comprise a primary transmission screw, at least one secondary transmission screw and a final transmission screw, the final transmission screw is sleeved in the at least one secondary transmission screw in a sliding manner, and the at least one secondary transmission screw is sleeved in the primary transmission screw in a sliding manner; the primary transmission screw rod is composed of a hollow primary pipe body, a primary limiting cover and a primary pipe body with an opening at the upper end, the outer side wall of the primary pipe body is provided with primary external threads, the primary limiting cover is buckled at the upper end part of the primary pipe body to limit internal threads of the inner wall of the lower end of the adjacent secondary pipe body, and a primary spring cable perforation is formed at the upper end of the primary limiting cover, so that when the transmission screw rods at all levels move up and down, the spring cable can synchronously and smoothly stretch up and down, the lower end of the primary pipe body penetrates through the middle part of the lower bottom wall of the primary pipe body and is fixedly exposed out of the lower bottom wall of the primary pipe body, and the outer side wall of the lower end of the primary pipe body is provided with primary meshing teeth so as to synchronously rotate with a motor gear of a forward and reverse motor through a transfer gear; each secondary transmission screw rod is composed of a hollow secondary tube body, a secondary limiting cover and a secondary tube body with an opening at the upper end, secondary external threads are arranged on the outer side wall of the secondary tube body, the secondary limiting cover is buckled at the upper end part of the secondary tube body, a secondary spring cable perforation is arranged at the upper end of the secondary limiting cover, so that when each stage of transmission screw rod moves up and down, the spring cable can synchronously and smoothly stretch up and down, the lower end of the secondary tube body penetrates through the middle part of the lower bottom wall of the secondary tube body and is fixed at the lower bottom surface of the secondary tube body, secondary internal threads are arranged on the inner wall of the lower end of the secondary tube body, and if an upper secondary transmission screw rod and a lower secondary transmission screw rod exist, the internal threads on the inner wall of the lower end of the secondary tube body of the upper transmission screw rod are conveniently screwed with the external threads on the outer side wall of the secondary tube body of the adjacent lower secondary transmission screw rod; if only one secondary transmission screw rod is arranged, the internal thread of the secondary pipe body of the secondary transmission screw rod is convenient to be screwed with the external thread on the outer side wall of the primary pipe body; the last-stage transmission screw is composed of a hollow last-stage tube body, and a last-stage internal thread is arranged on the inner wall of the lower end of the last-stage tube body and is convenient to be screwed with an external thread on the outer side wall of the adjacent tube body; the left end of the pressing device is provided with an inner groove, and the upper end of the last-stage pipe body is accommodated in the inner groove and fixedly connected with the pressing device through a bolt; the inner side wall of the last-stage transmission screw rod is screwed to accommodate the diode body of the adjacent second-stage transmission screw rod in the inner side wall, the last-stage pipe body of the last-stage transmission screw rod is slidably accommodated in the adjacent second-stage cylinder body, and the adjacent second-stage cylinder body plays a role in guiding and limiting the horizontal shaking of the last-stage transmission screw rod; the inner side wall of the secondary pipe body of the secondary transmission screw adjacent to the primary transmission screw is screwed to accommodate the primary pipe body of the adjacent primary transmission screw in the secondary pipe body, the secondary cylinder body of the secondary transmission screw is accommodated in the primary cylinder body in a sliding manner, and the adjacent primary cylinder body plays a role in guiding and limiting horizontal shaking of the adjacent secondary transmission screw;

the fixed arm is of a cylinder structure with an opening at the right end, a control button is arranged on the upper side wall at the left end of the fixed arm to respectively control the rotation of the rotary scrubbing head and the water spraying operation, the extension of a secondary transmission screw rod and a final transmission screw rod on the movable arm are controlled, a main circuit board is arranged at the corresponding inner wall of the cylinder of the fixed arm, a battery pack is fixedly arranged at the cylinder below the main circuit board, and the battery pack is electrically connected with the main circuit board through a lead; a positive and negative rotation motor is fixedly accommodated in a cylinder on the right side of the battery pack through a fixing frame, the positive and negative rotation motor is electrically connected with a main circuit board through a lead, the main circuit board synchronously drives a primary transmission screw to rotate in the positive and negative directions by controlling the positive and negative rotation of the positive and negative rotation motor so as to realize the extension and the shortening of a secondary transmission screw and a final transmission screw and adapt to the sizes of window glass with different lengths, the right lower part of a motor gear of the positive and negative rotation motor is mutually meshed with the left end of a transfer gear, the transfer gear is fixed on the lower part of the inner side wall of the cylinder through a bearing, the transfer gear plays a positive and negative transmission role, the upper part of the right end of the transfer gear is mutually meshed with meshing teeth on a primary pipe body of the primary transmission screw, at least two pressure shaft gears are uniformly distributed and meshed on the inner side wall of the fixing arm corresponding to the circumferential direction of the meshing teeth of the primary pipe body, and the pressure shaft gears are used for keeping the primary pipe body and the fixing arm to be coaxial, the friction damage between gears caused by the deviation of the primary pipe body from the axis is reduced; the left end of a spring cable is welded on the main circuit board, the middle part of the spring cable respectively penetrates through a through hole on a fixing frame on the right side of the motor gear along the inner side wall of the fixing arm rightwards and is accommodated in the inner wall of a first-stage pipe body of a first-stage transmission screw rod, and the right end of the spring cable respectively penetrates through a first-stage spring cable through hole, a second-stage spring cable through hole, the end part of a last-stage pipe body and a pressing device through hole and is electrically connected to a contact of the rotary scrubbing head, so that the control button can respectively control the rotation, the expansion, the wiping and the water spraying of the first-stage transmission screw rod, the second-stage transmission screw rod, the last-stage transmission screw rod and the rotary scrubbing head; this device simple structure, the equipment is convenient with the dismantlement, low cost, can realize carrying out self-cleaning to outdoor glass face, when meetting outdoor glass face and having stubborn spot, only need a people hand to visit the window external force that applies on the fixed arm front end, rotatory cleaning head is cleaned under extra exogenic action and rotatory water spray cleaning action, will thoroughly clear away stubborn spot on the outdoor glass face, need not the operator and visit the outer operation of body window, has stopped the safety risk that outdoor glass face was cleaned to the high-rise resident family completely.

The cable guide tubes are respectively arranged at the first-stage spring cable perforation of the first-stage limiting cover and the second-stage spring cable perforation of the second-stage limiting cover downwards so as to prevent the spring cable from curling and knotting at the first-stage spring cable perforation and the second-stage spring cable perforation when the spring cable is extended or retracted at the last-stage transmission screw and the second-stage transmission screw, so as to influence the expansion and contraction of the device, as most of the spring cable is positioned in the hollow cavity of the first-stage pipe body of the first-stage transmission screw, the cavity space is wide, thereby avoiding the fault that the transmission screw cannot be extended or shortened due to the bending of the cable in the extension or shortening process of each stage of transmission screw, the spring cable is guided by the cable guide tubes to straighten when passing through the perforations of the first-stage transmission screw and the second-stage transmission screw respectively, and further reducing the fault that the spring cable passes through each stage of transmission screw, the smooth operation of the device is guaranteed.

The pressing device is two connecting arms hinged through the hinge shaft, the pressing device is used for conveniently adjusting the attaching degree between the rotary scrubbing head and the outdoor glass surface, the rotary scrubbing head can better clean the outdoor glass surface, the hinged part is provided with a pressing spring limiting pin, the left connecting arm is provided with an inner groove, the end part of the last-stage pipe body of the last-stage transmission screw rod is contained in the inner groove and is fixed at the inner groove through a bolt, the right connecting arm is fixedly connected with the upper end of the rotary scrubbing head through a buckle, the pressing spring limiting pin is used for locking the position of the right connecting arm after the angle between the rotary scrubbing head and the movable arm is adjusted, and the included angle between the rotary scrubbing head and the movable arm after adjustment is prevented from being randomly changed.

The rotary scrubbing head comprises a shell, a scrubbing sponge head, a driving motor, a battery, a water storage tank and a water pump; the top of the shell is provided with a clamping groove which is matched and clamped with the pressing device, so that the rotary scrubbing head and the movable arm can be conveniently detached and installed, and the lower end surface of the shell is provided with a water spraying hole; inside driving motor inverted placed the casing, and driving motor's pivot passes the casing under the diapire expose locate outside it, the up end of scrubbing sponge head is connected with driving motor's pivot transmission, the battery is fixed in the casing on driving motor left, and be connected with driving motor electricity through the contact, with the control signal that received control button sent, storage water tank and water pump set up in the casing on driving motor right side, the water inlet of water pump leads to pipe and storage water tank intercommunication, the delivery port of water pump leads to pipe and hole for water spraying intercommunication, the water pump passes through the wire and is connected with the spring cable electricity, with the water spray control signal that received control button sent.

The shell materials of the fixed arm, the pressing device and the rotary scrubbing head are all high-strength engineering plastics, so that the strength of the device is maintained, and meanwhile, the production cost of products is reduced.

The cross section of the fixed arm is round or square with four corners in arc transition.

Advantageous effects

This real novel simple structure has, low cost can realize carrying out self-cleaning to outdoor glass face, and can thoroughly clear away stubborn spot on the external glass face, only needs a people hand to visit out-of-window operation, need not to visit out-of-window operation, has stopped the safety risk that outdoor glass face was cleaned to high-rise resident family completely.

Drawings

Fig. 1 is a schematic top view of the present invention.

Fig. 2 is a schematic sectional view taken along line a-a of fig. 1.

Fig. 3 is an enlarged sectional view schematically showing a movable arm portion of fig. 2.

Fig. 4 is a schematic structural view of the working principle of the movable arm of the present invention.

Figure 5 is a cross-sectional view of the one-stage drive screw of the present invention.

Figure 6 is a cross-sectional view of the two stage drive screw of the present invention.

Fig. 7 is a cross-sectional view of the final drive screw of the present invention.

In the drawings, the names corresponding to the reference numbers are: 1-movable arm, 11-drive screw, 12-hold-down device, 111-first drive screw, 112-second drive screw, 113-final drive screw, 121-left side connecting arm, 122-right side connecting arm, 123-hold-down spring limit pin, 1111-first tubular body, 1112-first limit cover, 1113-first tubular body, 1114-first external thread, 1115-first engaging tooth, 1121-second tubular body, 1122-second limit cover, 1123-second tubular body, 1124-second external thread, 1125-second internal thread, 1131-final tubular body, 1132-final internal thread, 2-fixed arm, 21-control button, 22-main circuit board, 23-battery pack, 24-fixed frame, 25-forward and reverse motor, 26-a transfer gear, 27-a pressing shaft gear, 28-a spring cable, 241-a through hole, 3-a rotary scrubbing head, 31-a shell, 32-a scrubbing sponge head, 33-a driving motor, 34-a battery, 35-a water storage tank, 36-a water pump, 311-a water spray hole and 4-a cable guide pipe.

Detailed Description

Referring to fig. 1 to 7, an automatic window cleaner includes a movable arm 1, a fixed arm 2, and a rotary cleaning head 3; the movable arm 1 and the fixed arm 2 are both hollow structures, the left end of the movable arm 1 is sheathed in the fixed arm 2 in a sliding way, the right end of the movable arm 1 is exposed out of the fixed arm 2, and the right end of the movable arm 1 is fixedly connected with the rotary cleaning head 3;

the movable arm 1 comprises four transmission screw rods 11 and a pressing device 12, the rightmost screw rods of the four transmission screw rods are fixedly connected with the pressing device 12 through bolts, and the pressing device 12 and the rotary scrubbing head 3 are fixed with each other through a buckle; the four transmission screws 11 comprise a first-stage transmission screw 111, an upper second-stage transmission screw 112, a lower second-stage transmission screw 112 and a last-stage transmission screw 113, wherein the last-stage transmission screw 113 is slidably sleeved in the upper second-stage transmission screw 112, the upper second-stage transmission screw 112 is slidably sleeved in the lower second-stage transmission screw 112, and the lower second-stage transmission screw 112 is slidably sleeved in the first-stage transmission screw 111; the primary transmission screw 111 is composed of a hollow primary tube 1111, a primary limiting cover 1112 and a primary tube 1113 with an opening at the upper end, primary external threads 1114 are arranged on the outer side wall of the primary tube 1111, the primary limiting cover 1112 is buckled at the upper end of the primary tube 1111, a primary spring cable perforation is arranged at the upper end of the primary limiting cover 1112, the lower end of the primary tube 1111 penetrates through the middle of the lower bottom wall of the primary tube 1113 and is fixedly exposed outside the lower bottom wall of the primary tube 1113, and primary meshing teeth 1115 are arranged on the outer side wall of the lower end of the primary tube 1111; each secondary transmission screw 112 is composed of a hollow secondary tube 1121, a secondary limiting cover 1122 and a secondary cylinder 1123 with an opening at the upper end, a secondary external thread 1124 is arranged on the outer side wall of the secondary tube 1121, the secondary limiting cover 1122 is buckled at the upper end of the secondary tube 1121, a secondary spring cable perforation is arranged at the upper end of the secondary limiting cover 1122, the lower end of the secondary tube 1121 penetrates through the middle of the lower bottom wall of the secondary cylinder 1123 and is fixed at the lower bottom surface of the secondary cylinder 1123, and a secondary internal thread 1125 is arranged on the inner wall of the lower end of the secondary tube 1121; the final transmission screw 113 is composed of a hollow final pipe body 1131, and a final internal thread 1132 is arranged on the inner wall of the lower end of the final pipe body 1131; an inner groove is formed in the left end of the pressing device 12, and the upper end of the last-stage pipe body 1131 is accommodated in the inner groove and is fixedly connected with the pressing device 12 through a bolt; the inner side wall of the final stage transmission screw 113 is screwed to accommodate the secondary tube 1121 of the upper secondary transmission screw 112 therein, and the final stage tube 1131 of the final stage transmission screw 113 is slidingly accommodated in the upper secondary cylinder 1123; the inner side wall of the secondary tube 1121 of the upper secondary transmission screw 112 is screwed to accommodate the secondary tube 1121 of the lower secondary transmission screw 112 therein, and the secondary cylinder 1123 of the upper secondary transmission screw 112 is slidingly accommodated in the lower secondary cylinder 1123; the inner side wall of the secondary tube 1121 of the lower secondary transmission screw 112 is screwed to accommodate the primary tube 1111 of the adjacent primary transmission screw 111 therein, and the secondary cylinder 1123 of the lower secondary transmission screw 112 is slidingly accommodated in the primary cylinder 1113;

the fixing arm 2 is of a cylinder structure with an opening at the right end, a control button 21 is arranged on the upper side wall at the left end of the fixing arm 2, a main circuit board 22 is arranged at the inner wall of the cylinder of the corresponding fixing arm 2, a battery pack 23 is fixedly arranged at the cylinder below the main circuit board 22, and the battery pack 23 is electrically connected with the main circuit board 22 through a lead; a positive and negative rotation motor 25 is fixedly accommodated in the cylinder on the right side of the battery pack 23 through a fixing frame 24, the positive and negative rotation motor 25 is electrically connected with a main circuit board 22 through a lead, the right lower part of a motor gear of the positive and negative rotation motor 25 is meshed with the left end of a transfer gear 26, the transfer gear 26 is fixed on the lower part of the inner side wall of the cylinder through a bearing, the upper part of the right end of the transfer gear 26 is meshed with meshing teeth 1115 on a primary pipe body 1111 of a primary transmission screw 111, and three pressure shaft gears 27 are uniformly distributed and meshed at the inner side wall of a fixing arm 2 corresponding to the circumferential direction of the meshing teeth 1115 of the primary pipe body 1111; the left end of a spring cable 28 is welded on the main circuit board 22, the middle part of the spring cable 28 respectively penetrates through a through hole 241 on the right fixing frame 24 of the motor gear along the inner side wall of the fixing arm 2 rightwards and is accommodated in the inner wall of the primary tube 1111 of the primary transmission screw 111, and the right end of the spring cable 28 respectively penetrates through the primary spring cable through hole, the secondary spring cable through hole, the end part of the final tube 1131 and the hole of the pressing device 12 and is electrically connected to the contact of the rotary scrubbing head 3.

The cable guide tube 4 is respectively arranged at the primary spring cable perforation of the primary limiting cover 1112 and the secondary spring cable perforation of the secondary limiting cover 1122 downwards.

The compressing device 12 is composed of a left connecting arm 121 and a right connecting arm 122 which are hinged through a hinge shaft, a compressing spring limiting pin 123 is arranged at the hinged position, an inner groove is formed in the left connecting arm 121, the end part of a final stage pipe body 1131 of the final stage transmission screw 113 is contained in the inner groove and fixed at the inner groove through a bolt, and the right connecting arm 122 is fixedly connected with the upper end of the rotary scrub head 3 through a buckle.

The rotary scrubbing head 3 comprises a shell 31, a scrubbing sponge head 32, a driving motor 33, a battery 34, a water storage tank 35 and a water pump 36; the top of the shell 31 is provided with a clamping groove which is matched and clamped with the pressing device 12, and the lower end surface of the shell 31 is provided with a water spraying hole 311; the driving motor 33 is arranged in the shell 31 in an inverted mode, a rotating shaft of the driving motor 33 penetrates through the lower bottom wall of the shell 31 and is exposed outside the shell, the upper end face of the scrubbing sponge head 32 is in transmission connection with the rotating shaft of the driving motor 33, the battery 34 is fixed in the shell on the left side of the driving motor 33 and is electrically connected with the driving motor 33 through a contact, the water storage tank 35 and the water pump 36 are arranged in the shell 31 on the right side of the driving motor 33, a water inlet of the water pump 36 is communicated with the water storage tank 35 through a water pipe, a water outlet of the water pump 36 is communicated with the water spraying hole 311 through a water pipe, and the water pump 36 is electrically connected with the spring cable 28 through a conducting wire.

The fixing arm 2, the pressing device 12 and the shell 31 of the rotary scrubbing head 3 are all made of high-strength engineering plastics.

The cross section of the fixed arm 2 is round or square with four corners in arc transition.

Principle of operation

Installation: referring to fig. 1-7, an L-shaped suction cup holder (not shown in the figure) is taken, a suction cup at the short arm end is fixed on the inner glass surface of a window, the long arm end extends out of the window, a U-shaped clip capable of rotating the long arm end by 360 degrees is arranged at the end part of the long arm, the middle part of a fixed arm 2 is clamped into the U-shaped clip, one end of a rotary cleaning head 3 is close to the outdoor glass surface of the window to be cleaned, the angle between the rotary cleaning head 3 and a movable arm 1 is adjusted, and the adjusted angle is fixed through a compression spring limiting pin 123, so that the rotary cleaning head 3 is better attached to the glass surface, and the installation work of the automatic window cleaner and the window glass is completed;

wiping: pressing a switch key of a control button 21 on the left side of a fixed arm 2, starting a scrubbing sponge head 32 of a rotary scrubbing head 3 to rotate, holding the right part of the fixed arm 2 by hand, taking a U-shaped clamp of an L-shaped sucker fixer as a shaft, rotating the fixed arm 2 up and down to scrub the outer glass surface close to the area, then dragging the fixed arm 2 to extend forwards by hand to enable the fixed arm 2 to slide forwards in the U-shaped clamp until the fixed arm 2 slides to the position close to the control button 21 on the left end of the fixed arm 2 in the U-shaped clamp to stop moving forwards, and scrubbing the floating soil in the sector area in the sliding process; if a part of the glass surface above the outdoor glass surface of the window is not wiped at this time, the extending key of the control button 21 can be pressed to drive the forward and reverse rotation motor 25 to rotate forward, the first-stage transmission screw 111 is driven to rotate forward by the transmission of the transfer gear 26, the lower second-stage transmission screw 112, the upper second-stage transmission screw 112 and the final-stage transmission screw 113 which are screwed with the first-stage transmission screw 111 synchronously rotate and move upwards to drive the pressing device 12 and the rotary wiping head 3 to move upwards together, when the lower second-stage transmission screw 112 reaches the position of the first-stage limit cover 1112, the lower second-stage transmission screw 112 does not move upwards to start idle rotation, and the upper second-stage transmission screw 112 starts to rotate and move upwards until the position of the second-stage limit cover 1122 of the lower second-stage transmission screw 112 is reached, the upper second-stage transmission screw 112 does not move upwards to start idle rotation, and the final-stage transmission screw 113 starts to rotate and move upwards until the position of the second-stage limit cover 1122 of the upper second-stage transmission screw 112 is reached, at the moment, the pressing of the extension key can be stopped, and in the process of moving the movable arm 1 forwards, the hand can control the fixed arm 2 to swing left and right by taking the U-shaped clamp as a shaft, so that all sector areas passed by the rotary cleaning head 3 are cleaned;

removing stubborn stains: when stubborn stains appear on the outer glass surface of the window locally, the rotary cleaning head 3 of the automatic window cleaner is extended to the position, the water spraying key of the control button 21 can be inching, water is sprayed from the water spraying hole 311 of the rotary cleaning head 3 to wet the glass surface at the stubborn stains, then the front end of the fixed arm 2 is held by a hand to apply external force to the rotary cleaning head 3, and the wet stubborn stains on the glass surface are thoroughly cleaned by matching with the rotary cleaning sponge head 32;

and (3) recovering the movable arm after cleaning: when the outer glass surface of the window to be cleaned is completely cleaned, the on-off key of the control button 21 is pressed, the rotation of the scrubbing sponge head 32 on the rotary scrubbing head 3 is stopped, the retraction key of the control button 21 is pressed, the forward and reverse rotation motor 25 is driven to rotate reversely, the first-stage transmission screw 111, the lower second-stage transmission screw 112, the upper second-stage transmission screw 112 and the final-stage transmission screw 113 are driven to rotate reversely through the transmission of the transfer gear 26, the final-stage transmission screw 113, the upper second-stage transmission screw 112 and the lower second-stage transmission screw 112 sequentially rotate and move downwards to return to the initial positions, the recovery of the movable arm 1 is completed, the automatic window cleaner is taken down from the U-shaped clamp of the L-shaped sucker fixer, the suction of the sucker on the L-shaped sucker fixer to the glass surface in the window is removed, and the disassembly of the device is completed.

While the invention has been particularly shown as described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims (6)

1. An automatic window cleaner comprises a movable arm (1), a fixed arm (2) and a rotary cleaning head (3); the movable arm (1) and the fixed arm (2) are both hollow structures, the left end of the movable arm (1) is sleeved in the fixed arm (2) in a sliding manner, the right end of the movable arm (1) is exposed out of the fixed arm (2), and the right end of the movable arm (1) is fixedly connected with the rotary scrubbing head (3); the method is characterized in that:

the movable arm (1) comprises at least three transmission screw rods (11) and a pressing device (12), the rightmost screw rod of the at least three transmission screw rods is fixedly connected with the pressing device (12) through a bolt, and the pressing device (12) and the rotary scrubbing head (3) are mutually fixed through a buckle;

the at least three transmission screws (11) comprise a primary transmission screw (111), at least one secondary transmission screw (112) and a final transmission screw (113), the final transmission screw (113) is sleeved in the adjacent secondary transmission screw (112) in a sliding manner, and the secondary transmission screw (112) is sleeved in the adjacent primary transmission screw (111) in a sliding manner;

the primary transmission screw (111) is composed of a hollow primary pipe body (1111), a primary limiting cover (1112) and a primary cylinder body (1113) with an opening at the upper end, primary external threads (1114) are arranged on the outer side wall of the primary pipe body (1111), the primary limiting cover (1112) is buckled at the upper end of the primary pipe body (1111), a primary spring cable perforation is formed in the upper end of the primary limiting cover (1112), the lower end of the primary pipe body (1111) penetrates through the middle of the lower bottom wall of the primary cylinder body (1113) and is fixedly exposed out of the lower bottom wall of the primary cylinder body (1113), and primary meshing teeth (1115) are arranged on the outer side wall of the lower end of the primary pipe body (1111);

each secondary transmission screw (112) is composed of a hollow secondary tube (1121), a secondary limiting cover (1122) and a secondary tube (1123) with an opening at the upper end, a secondary external thread (1124) is arranged on the outer side wall of the secondary tube (1121), the secondary limiting cover (1122) is buckled at the upper end of the secondary tube (1121), a secondary spring cable perforation is formed in the upper end of the secondary limiting cover (1122), the lower end of the secondary tube (1121) penetrates through the middle of the lower bottom wall of the secondary tube (1123) and is fixed at the lower bottom surface of the secondary tube (1123), and a secondary internal thread (1125) is arranged on the inner wall of the lower end of the secondary tube (1121);

the final-stage transmission screw (113) is composed of a hollow final-stage pipe body (1131), and a final-stage internal thread (1132) is arranged on the inner wall of the lower end of the final-stage pipe body (1131);

an inner groove is formed in the left end of the pressing device (12), and the upper end of the last-stage pipe body (1131) is accommodated in the inner groove and is fixedly connected with the pressing device (12) through a bolt;

the inner side wall of the final transmission screw (113) is screwed to accommodate the secondary tube body (1121) of the adjacent secondary transmission screw (112) therein, and the final tube body (1131) of the final transmission screw (113) is slidingly accommodated in the adjacent secondary tube body (1123); the inner side wall of a secondary tube body (1121) of a secondary transmission screw (112) adjacent to the primary transmission screw (111) is screwed to accommodate a primary tube body (1111) of the adjacent primary transmission screw (111) in the secondary tube body, and a secondary cylinder body (1123) of the secondary transmission screw (112) is slidingly accommodated in a primary cylinder body (1113);

the fixing arm (2) is of a cylinder structure with an opening at the right end, a control button (21) is arranged on the upper side wall of the left end of the fixing arm (2), a main circuit board (22) is arranged at the inner wall of the cylinder of the corresponding fixing arm (2), a battery pack (23) is fixedly arranged at the cylinder below the main circuit board (22), and the battery pack (23) is electrically connected with the main circuit board (22) through a lead; a positive and negative rotation motor (25) is fixedly accommodated in a cylinder body on the right side of the battery pack (23) through a fixing frame (24), the positive and negative rotation motor (25) is electrically connected with a main circuit board (22) through a lead, the right lower part of a motor gear of the positive and negative rotation motor (25) is meshed with the left end of a transfer gear (26), the transfer gear (26) is fixed on the lower part of the inner side wall of the cylinder body through a bearing, the upper part of the right end of the transfer gear (26) is meshed with first-stage meshing teeth (1115) on a first-stage pipe body (1111) of a first-stage transmission screw (111), and at least two pressure shaft gears (27) are uniformly distributed and meshed at the inner side wall of a fixing arm (2) corresponding to the circumferential direction of the first-stage meshing teeth (1115) of the first-stage pipe body (1111); the left end of a spring cable (28) is welded on the main circuit board (22), the middle part of the spring cable (28) respectively penetrates through a through hole (241) on a fixing frame (24) on the right side of the motor gear rightwards along the inner side wall of the fixing arm (2) to be accommodated in the inner wall of a primary pipe body (1111) of a primary transmission screw (111), and the right end of the spring cable (28) respectively penetrates through a primary spring cable through hole, a secondary spring cable through hole, the end part of a final pipe body (1131) and a hole of a pressing device (12) to be electrically connected to a contact of the rotary scrubbing head (3).

2. An automatic window cleaner as defined in claim 1, wherein: and a cable guide pipe (4) is respectively arranged at the perforation of the primary spring cable of the primary limiting cover (1112) and the perforation of the secondary spring cable of the secondary limiting cover (1122) downwards.

3. An automatic window cleaner as defined in claim 1, wherein: the pressing device (12) comprises a left connecting arm (121) and a right connecting arm (122) which are hinged through a hinge shaft, a pressing spring limiting pin (123) is arranged at the hinged position, an inner groove is formed in the left connecting arm (121), the end part of a last-stage pipe body (1131) of a last-stage transmission screw (113) is accommodated in the inner groove and fixed at the inner groove through a bolt, and the right connecting arm (122) is fixedly connected with the upper end of the rotary scrubbing head (3) through a buckle.

4. An automatic window cleaner as defined in claim 1, wherein: the rotary scrubbing head (3) comprises a shell (31), a scrubbing sponge head (32), a driving motor (33), a battery (34), a water storage tank (35) and a water pump (36); the top of the shell (31) is provided with a clamping groove which is matched and clamped with the pressing device (12), and the lower end surface of the shell (31) is provided with a water spraying hole (311); the driving motor (33) is arranged in the shell (31) in an inverted mode, a rotating shaft of the driving motor (33) penetrates through the lower bottom wall of the shell (31) and is exposed outside the shell, the upper end face of the scrubbing sponge head (32) is in transmission connection with the rotating shaft of the driving motor (33), the battery (34) is fixed in the shell on the left side of the driving motor (33) and is electrically connected with the driving motor (33) through a contact, the water storage tank (35) and the water pump (36) are arranged in the shell (31) on the right side of the driving motor (33), a water inlet of the water pump (36) is communicated with the water storage tank (35) through a water pipe, a water outlet of the water pump (36) is communicated with the water spraying hole (311) through a water pipe, and the water pump (36) is electrically connected with the spring cable (28) through a conducting wire.

5. An automatic window cleaner according to claim 4, wherein: the fixing arm (2), the pressing device (12) and the shell (31) of the rotary scrubbing head (3) are all made of high-strength engineering plastics.

6. An automatic window cleaner as defined in claim 1, wherein: the cross section of the fixed arm (2) is round or square with four corners in arc transition.

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