Air inlet structure of a handheld vacuum cleaner

Abstract

The utility model discloses an air intake structure of a handheld vacuum cleaner, comprising an air duct body, an air inlet, an air outlet and a shell buckled with the air duct body; two groups of dust amount detection components are arranged on the air duct body near the air outlet, the dust amount detection components include a mounting plate and a mounting seat that passes through the inner wall of one side of the air duct body and is plugged thereon, the mounting seat is made of transparent material, a sensor is arranged on the mounting plate, and one end of the sensor away from the mounting plate is located in the mounting seat. The utility model can monitor the amount of dust sucked in the air duct in real time and clean the dust cup in time, avoiding the phenomenon of dust running after long-term use.

Description

Technical Field

[0001] The utility model relates to the technical field of handheld vacuum cleaners, in particular to an air inlet structure of a handheld vacuum cleaner. Background Art

[0002] Vacuum cleaners are an important tool for cleaning homes or public environments. Vacuum cleaners are mainly used to remove dust from various gaps on the floor, carpets, walls, etc. Among them, handheld vacuum cleaners are more widely used because of their small size, lighter weight than horizontal and barrel vacuum cleaners, and convenient storage.

[0003] The main reason why a handheld vacuum cleaner can remove dust is that it has an electric exhaust fan installed on its "head". There is an impeller on the rotating shaft of the exhaust fan. After power is turned on, the exhaust fan will generate suction and pressure at a certain speed. Under the action of suction and pressure, the air is discharged at a high speed, and the air in the dust suction part at the front end of the fan continuously replenishes the air in the fan, causing an instantaneous vacuum inside the vacuum cleaner, forming a negative pressure with the external atmospheric pressure. The air passes through the filter from the main suction port of the suction nozzle and is finally discharged from the tail of the machine body.

[0004] In order to ensure that the dust volume in the dust cup of a handheld vacuum cleaner can be monitored in real time and cleaned in time, a dust sensing sensor is usually installed in the air duct inside the nozzle. However, the sensor is directly installed inside the nozzle. On the one hand, it is not convenient to clean its surface. Long-term use will cause dust to accumulate on the sensor, making it insensitive to the amount of dust sucked, and unable to achieve the effect of timely cleaning of the dust cup; on the other hand, direct installation leads to a gap between the sensor and the nozzle, which is prone to dust leakage.

[0005] Therefore, it is necessary to provide an air intake structure for a handheld vacuum cleaner to solve the above problems. Utility Model Content

[0006] In order to overcome the above shortcomings, the purpose of the utility model is to provide an air intake structure for a handheld vacuum cleaner, which can monitor the amount of dust sucked in the air duct in real time and clean the dust cup in time to avoid dust leakage during long-term use.

[0007] In order to achieve the above purpose, the technical solution adopted by the utility model is: an air inlet structure of a handheld vacuum cleaner, comprising an air duct body, an air inlet, an air outlet and an outer shell that is buckled with the air duct body; two groups of dust amount detection components are arranged on the air duct body near the air outlet, and the dust amount detection components include a mounting plate and a mounting seat that passes through the inner wall of one side of the air duct body and is plugged thereon, the mounting seat is made of transparent material, a sensor is arranged on the mounting plate, and the end of the sensor away from the mounting plate is located in the mounting seat.

[0008] The mounting base, sensor and duct body cooperate with each other. The mounting base is made of transparent material and is plugged into the duct body. On the one hand, the transparent material ensures that it will not interfere with the sensing of the sensor located thereon, thereby ensuring the effect of dust detection. On the other hand, the plug-in structure of the mounting base can also ensure that after long-term use, there will be no dust running compared to when the sensor is directly plugged into the duct body.

[0009] The dust detection component is arranged on the air duct body near the air outlet, so that the staff can enter the air outlet with a cleaning cloth to clean the part of the mounting seat located inside the air duct body, so as to ensure that the dust on the mounting seat will not interfere with the dust sensing of the sensor. At the same time, the sensor is located in the mounting seat, which can also protect it well. The dust and impurities entering the air duct body will not damage the sensor, which effectively increases the service life of the sensor.

[0010] Furthermore, the two groups of dust detection components are located on the outer wall of the air duct body and are symmetrically arranged along the center line of the air duct body in the width direction. That is, the sensors are also symmetrically arranged on the air duct body and are respectively located on both sides of the length direction of the air duct body. The two sensors arranged opposite to each other are respectively used to transmit and receive dust detection information.

[0011] Furthermore, the mounting seat includes a housing portion and a plug-in portion arranged around the housing portion. A mounting slot is provided on the upper side of the air duct body in a direction downwardly toward the center line of the width direction of the air duct body. The mounting slot is penetrated by a clearance groove for the housing portion to pass through. The mounting slot and the plug-in portion are interference fit. The housing portion is used for horizontal placement of the sensor. The plug-in portion and the plug-in portion on the air duct body are interference fit, thereby ensuring that dust inside the air duct body will not escape from the gap between the two to the outside of the air duct body, thereby avoiding the phenomenon of dust escaping from the suction nozzle and ensuring the cleaning effect. The clearance groove facilitates the housing portion equipped with the sensor to enter the interior of the air duct body, so that the sensing end on the sensor can fully sense the amount of dust sucked into the suction nozzle.

[0012] Furthermore, the accommodating portion is arranged horizontally and has a hollow accommodating cavity for inserting the sensor along its length direction. The entire mounting base is made of transparent material, and the sensing end of the sensor is inserted into the accommodating cavity. On the one hand, the accommodating cavity plays a role in positioning the sensor, so that the amount of dust sucked into the suction nozzle can be stably detected, and on the other hand, it can also protect the sensor and ensure the service life of the sensor.

[0013] Furthermore, one end of the sensor is welded on a mounting plate, which facilitates the installation of the sensor and supports the sensor.

[0014] Furthermore, a positioning piece is horizontally arranged on the outer wall of the air duct body above the mounting seat, and a threaded hole is horizontally provided on the positioning piece, and a screw passes through the screw insertion hole on the mounting plate and is locked with the threaded hole. By providing the positioning piece, the sensor is fixed in the mounting seat, and its position will not change. It always remains in place during the movement and use of the handheld vacuum cleaner, ensuring the stability of its dust detection. The sensor and the air duct body are detachable through screw connection, which facilitates the replacement operation of the sensor.

[0015] Furthermore, the two sensors are opposing beam sensors, one of which is a transmitting end and the other is a receiving end.

[0016] Beneficial effects of the utility model:

[0017] The mounting base, sensor and duct body described in the utility model cooperate with each other. The mounting base is made of transparent material and is plugged into the duct body. On the one hand, the transparent material ensures that it will not interfere with the sensor located thereon, thereby ensuring the effect of dust detection. On the other hand, the plug-in structure of the mounting base can also ensure that after long-term use, there will be no dust running phenomenon compared to when the sensor is directly plugged into the duct body. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is an isometric view of the overall structure of an embodiment of the utility model;

[0019] Figure 2 It is a partial structural isometric view of an embodiment of the utility model;

[0020] Figure 3 It is another partial structural isometric view of an embodiment of the utility model;

[0021] Figure 4 This is a schematic cross-sectional view of the overall structure of an embodiment of the utility model;

[0022] Figure 5 This is a schematic diagram of the mounting plate and sensor structure of an embodiment of the utility model;

[0023] Figure 6 This is an isometric view of the overall structure of the mounting base of an embodiment of the utility model;

[0024] In the figure: 1. duct body; 2. outer shell; 3. air inlet; 4. air outlet; 5. mounting seat; 51. accommodating part; 52. accommodating cavity; 53. plug-in part; 6. mounting slot; 7. clearance slot; 8. positioning piece; 9. mounting plate; 10. sensor; 11. threaded hole; 12. screw socket. DETAILED DESCRIPTION

[0025] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.

[0026] See attached Figures 1 to 6 As shown, an air inlet structure of a handheld vacuum cleaner in this embodiment includes an air duct body 1, an air inlet 3, an air outlet 4 and a shell 2 that is snapped with the air duct body 1; two groups of dust amount detection components are arranged on the air duct body 1 near the air outlet 4, and the dust amount detection components include a mounting plate 9 and a mounting seat 5 that passes through the inner wall of one side of the air duct body 1 and is plugged thereon, the mounting seat 5 is made of transparent material, a sensor 10 is arranged on the mounting plate 9, and the end of the sensor 10 away from the mounting plate 9 is located in the mounting seat 5.

[0027] The mounting base 5, the sensor 10 and the duct body 1 cooperate with each other. The mounting base 5 is made of a transparent material and is plugged into the duct body 1. On the one hand, the transparent material ensures that it will not interfere with the sensing of the sensor 10 located thereon, thereby ensuring the effect of dust detection. On the other hand, the plug-in structure of the mounting base 5 can also ensure that after long-term use, there will be no dust running compared to when the sensor 10 is directly plugged into the duct body 1.

[0028] The dust detection component is arranged on the air duct body 1 near the air outlet 4, so that the staff can enter the air outlet 4 with a cleaning cloth to clean the part of the mounting seat 5 located inside the air duct body 1, so as to ensure that the dust on the mounting seat 5 will not interfere with the dust sensing of the sensor 10. At the same time, the sensor 10 is located in the mounting seat 5, which can also protect it well. The dust and impurities entering the air duct body 1 will not damage the sensor 10, and the service life of the sensor 10 is effectively improved.

[0029] In some embodiments, one sensor 10 of the two sets of dust detection components is a transmitter, and the sensor 10 is used to sense the amount of dust sucked into the air duct body 1, and the other sensor 10 is a receiver, and is used to receive the detection information of the transmitter.

[0030] After the duct body 1 and the shell 2 are buckled together, the two are locked and connected by multiple screws. The shell 2 can ensure the overall aesthetics of the handheld vacuum cleaner nozzle on the one hand, and on the other hand, it can protect the dust detection mechanisms arranged on both sides of the duct body 1. It can also be used to protect the multiple wire harnesses arranged on the outside of the duct body 1.

[0031] The two groups of dust amount detection components are located on the outer wall of the air duct body 1 and are symmetrically arranged along the center line of the width direction of the air duct body 1. That is, the sensors 10 are also symmetrically arranged on the air duct body 1 and are respectively located on both sides of the length direction of the air duct body 1. The two sensors 10 arranged opposite to each other are respectively used to transmit and receive dust amount detection information.

[0032] In other embodiments, the two dust amount detection components can also be set on the same side of the outer wall of the air duct body 1. It is not limited to setting the two dust amount detection components on both sides or the same side, as long as one of the sensors 10 transmits the detected dust amount information and the other receives the detection information.

[0033] The mounting seat 5 includes a receiving portion 51 and a plug-in portion 53 arranged around the receiving portion 51. A mounting slot 6 is provided on the air duct body 1 along the direction of the center line of the air duct body 1 in the width direction. The mounting slot 6 is penetrated by a clearance groove 7 for the receiving portion 51 to pass through. The mounting slot 6 is interference fit with the plug-in portion 53. The receiving portion 51 is used for horizontal placement of the sensor 10. The plug-in portion 53 is interference fit with the plug-in portion 53 on the air duct body 1, thereby ensuring that dust inside the air duct body 1 will not escape from the gap between the two to the outside of the air duct body 1, thereby avoiding the phenomenon of dust running out of the suction nozzle and ensuring the cleaning effect. The clearance groove 7 facilitates the receiving portion 51 equipped with the sensor 10 to enter the air duct body 1, so that the sensing end on the sensor 10 can fully sense the amount of dust sucked into the suction nozzle.

[0034] In some embodiments, the plug-in portion 53 surrounds the middle portion of the accommodating portion 51, so that a portion of the accommodating portion 51 passes through the clearance slot 7 and extends into the air duct body 1, making the dust amount detection more accurate.

[0035] The accommodating portion 51 is arranged horizontally and has a hollow accommodating cavity 52 for inserting the sensor 10 along its length direction. The mounting base 5 is made of transparent material as a whole, and the sensing end of the sensor 10 is inserted into the accommodating cavity 52. ​​On the one hand, the accommodating cavity 52 plays a role in positioning the sensor 10, so that the amount of dust sucked into the suction nozzle can be stably detected. On the other hand, it can also protect the sensor 10 and ensure the service life of the sensor 10.

[0036] One end of the sensor 10 is welded on the mounting plate 9. The mounting plate 9 is provided to facilitate the installation of the sensor 10 and to support the sensor 10.

[0037] A positioning member 8 is horizontally arranged on the outer wall of the air duct body 1 above the mounting seat 5, and a threaded hole 11 is horizontally opened on the positioning member 8. The screw passes through the screw insertion hole 12 on the mounting plate 9 and is locked with the threaded hole 11. By setting the positioning member 8, the sensor 10 is fixed in the mounting seat 5, and its position will not change. It always remains in place during the mobile use of the handheld vacuum cleaner, ensuring its stability in detecting the amount of dust. The sensor 10 and the air duct body 1 are detachable through the screw connection, which facilitates the replacement operation of the sensor 10.

[0038] The two sensors 10 are through-beam sensors 10 , one of which is a transmitting end and the other is a receiving end.

[0039] The above implementation modes are only for illustrating the technical concept and features of the utility model, and their purpose is to allow people familiar with this technology to understand the content of the utility model and implement it. It cannot be used to limit the protection scope of the utility model. Any equivalent changes or modifications made according to the spirit of the utility model should be included in the protection scope of the utility model.

Claims

1. An air inlet structure for a handheld vacuum cleaner, characterized in that: It includes an air duct body, an air inlet, an air outlet and an outer shell that is buckled with the air duct body; two sets of dust detection components are arranged on the air duct body near the air outlet, and the dust detection components include a mounting plate and a mounting seat that passes through the inner wall of one side of the air duct body and is plugged thereon, the mounting seat is made of transparent material, a sensor is arranged on the mounting plate, and the end of the sensor away from the mounting plate is located in the mounting seat.

2. The air inlet structure of a handheld vacuum cleaner according to claim 1, characterized in that: The two groups of dust detection components are located on the outer wall of the air duct body and are symmetrically arranged along the center line of the width direction of the air duct body.

3. The air inlet structure of a handheld vacuum cleaner according to claim 1, characterized in that: The mounting seat includes a receiving portion and a plug-in portion arranged around the receiving portion. A mounting slot is provided on the air duct body along a direction toward the center line of the air duct body in the width direction. The mounting slot is penetrated by a makeshift slot for the receiving portion to pass through. The mounting slot is interference fit with the plug-in portion.

4. The air inlet structure of a handheld vacuum cleaner according to claim 3, characterized in that: The accommodating portion is arranged horizontally and is hollowed out along its length direction to form an accommodating cavity for inserting the sensor.

5. The air inlet structure of a handheld vacuum cleaner according to claim 1, characterized in that: One end of the sensor is welded on the mounting plate.

6. The air inlet structure of a handheld vacuum cleaner according to claim 1, characterized in that: A positioning piece is horizontally arranged on the outer wall of the air duct body above the mounting seat, and a threaded hole is horizontally opened on the positioning piece. A screw passes through a screw insertion hole on the mounting plate and is locked with the threaded hole.

7. The air inlet structure of a handheld vacuum cleaner according to claim 1, characterized in that: The two sensors are through-beam sensors, one of which is a transmitting end and the other is a receiving end.

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