Handheld vacuum cleaner

Abstract

The present invention relates to a household cleaning device, and discloses a handheld vacuum cleaner. If the infrared rays emitted by the transmitting unit are blocked by the hand so that the receiving unit cannot receive them, the controller controls the vacuum cleaner to start. Conversely, if the receiving unit can receive the infrared rays emitted by the transmitting unit, the controller does not control the vacuum cleaner to start. In the handheld vacuum cleaner of the present invention, before starting the vacuum cleaner, the user must first hold the handle with their hand. After the trigger unit is triggered, the infrared rays emitted by the transmitting unit are blocked by the hand, preventing the receiving unit from receiving them. Only then can the controller control the vacuum cleaner to operate. Conversely, if the hand does not hold the handle, so that the receiving unit can receive the infrared rays emitted by the transmitting unit, the trigger unit is considered to be falsely triggered, and the controller does not control the vacuum cleaner to operate. This achieves the purpose of preventing the vacuum cleaner from falsely starting, not only saving energy but also extending the service life of the vacuum cleaner.

Description

Technical Field

[0001] The present invention relates to household cleaning devices, in particular to a handheld vacuum cleaner. Background Art

[0002] Vacuum cleaners can be divided into vertical, horizontal, and portable types based on their structure. The working principle of a vacuum cleaner is that a motor drives the blades to rotate at high speed, creating negative air pressure within a sealed housing to absorb dust. To improve user convenience, a vehicle-mounted vacuum cleaner, such as that disclosed in Publication No. CN209048028U, is available on the market. The vacuum cleaner comprises a rear-end handheld housing and a front-end dust collection housing. The handheld housing and the dust collection housing are connected by a detachable structure. The rear portion of the handheld housing is provided with a through-hole structure extending through both sides. The upper portion of the through-hole structure forms a handheld handle. Ventilation holes are provided on both sides of the front of the handheld housing. The front and rear ends of the dust collection housing are connected. The front end of the dust collection housing is provided with a dust suction port. A dust collection fan motor and a light are provided within the handheld housing, facing the rear port of the dust collection housing. A power socket electrically connected to the dust collection fan motor and the light is mounted on the rear end of the handheld housing. A dust suction switch and a light switch are mounted on the handheld handle to control the dust collection fan motor and the light, respectively.

[0003] Although the above-mentioned car vacuum cleaner has good vacuuming effect and lighting effect, and dust does not affect the lighting, the vacuum switch used to control the operation of the vacuum fan motor is directly exposed to the outside, which is prone to accidental touch, not only easily causing waste of electricity, but also affecting the service life of the vacuum cleaner. Therefore, it needs to be improved. Summary of the Invention

[0004] In view of the shortcomings of the prior art, the present invention provides a handheld vacuum cleaner, which must be held by the hand on the handle before starting, otherwise it cannot be started, so as to prevent accidental touch, thereby reducing power loss and extending the service life of the vacuum cleaner.

[0005] In order to solve the above technical problems, the present invention is solved by the following technical solutions:

[0006] A handheld vacuum cleaner includes a housing and a handle disposed on the housing. A trigger unit is disposed on the upper surface of the handle, and a controller is coupled to the trigger unit. The vacuum cleaner is controlled by the controller. A beaming infrared sensor is disposed on the lower surface of the handle. The beaming infrared sensor includes a transmitting unit and a receiving unit, which are disposed at opposite ends of the handle and are both coupled to the controller. The transmitting unit and the receiving unit are disposed opposite each other. The transmitting unit is configured to transmit infrared rays along the length of the handle, and the receiving unit is configured to receive the infrared rays emitted by the transmitting unit. When the trigger unit responds to an external trigger, it can send a start signal to the controller. After receiving the start signal, the controller controls the transmitting unit to transmit infrared rays to the receiving unit.

[0007] If the infrared rays emitted by the transmitting unit are blocked by the hand so that the receiving unit cannot receive them, the controller controls the vacuum cleaner to start;

[0008] On the contrary, if the receiving unit can receive the infrared ray emitted by the transmitting unit, the controller does not control the vacuum cleaner to start.

[0009] With this solution, the user must first hold the handle before activating the vacuum cleaner. This allows the user to block the infrared light emitted by the transmitting unit after the trigger unit is triggered, preventing the receiving unit from receiving it. Only then can the controller control the vacuum cleaner. Conversely, if the user does not hold the handle, allowing the receiving unit to receive the infrared light emitted by the transmitting unit, the trigger unit is considered to have been falsely triggered, and the controller will not control the vacuum cleaner. This prevents the vacuum cleaner from falsely activating, saving energy and extending the vacuum cleaner's service life.

[0010] Preferably, a storage groove is provided on the lower surface of the handle along its length direction, a driving roller is provided in the storage groove along its length direction, the transmitting unit and the receiving unit are respectively provided at both ends of the outer circumferential surface of the driving roller, and a driving member for driving the driving roller to rotate circumferentially to a first state or a second state is provided on the side of the handle away from the shell. The first state is that the driving roller rotates to a position where the transmitting unit and the receiving unit are outside the storage groove, and the second state is that the driving roller rotates to a position where the transmitting unit and the receiving unit are facing the bottom of the storage groove.

[0011] With the above solution, the driving member rotates the driving roller to the first position, which puts the through-beam infrared sensor into operation. Conversely, rotating the driving roller to the second position retracts the through-beam infrared sensor into the storage slot, preventing the sensor from being exposed for a long time and potentially damaging it.

[0012] Preferably, the driving member is a driving motor controlled by a controller, and the output shaft of the driving motor is coaxially connected to the driving roller. When the trigger unit responds to an external trigger to send a start signal to the controller, the controller first controls the driving motor to rotate the driving roller to the first state, and then controls the transmitting unit to transmit infrared rays to the receiving unit.

[0013] If the infrared rays emitted by the transmitting unit are blocked by the hand so that the receiving unit cannot receive them, the controller controls the vacuum cleaner to start;

[0014] On the contrary, if the receiving unit can receive the infrared ray emitted by the transmitting unit, the controller does not control the vacuum cleaner to start.

[0015] By adopting the above solution, when the user starts the vacuum cleaner, the through-beam infrared sensor can be automatically turned on to determine whether the user's hand is holding the handle, which is more humane.

[0016] Preferably, when the vacuum cleaner is in operation, if the receiving unit can receive the infrared rays emitted by the transmitting unit, the controller starts to calculate the duration for which the receiving unit continuously receives the infrared rays. When the calculated duration is greater than or equal to the preset duration built into the controller, the controller controls the vacuum cleaner to stop and at the same time controls the drive motor to rotate the drive roller to the second state.

[0017] With this solution, when the user puts down the vacuum cleaner without turning it off, it will automatically shut down after running for a period of time without load, and the infrared sensor will be stored. This not only further reduces the vacuum cleaner's energy waste but also extends its service life.

[0018] Preferably, the drive motor is fixed to the outside of the handle via a mounting base.

[0019] By adopting the above solution, the drive motor can be stably installed on the outside of the handle.

[0020] Preferably, a protective cover is provided outside the driving motor and is fixed to the outside of the handle.

[0021] By adopting the above solution, the protective cover can not only protect the driving motor, but also beautify the appearance of the entire vacuum cleaner, making it more humane.

[0022] Preferably, two wiping members are provided between the inner wall of the storage groove and the driving roller, and the two wiping members correspond to the sweeping planes of the transmitting unit and the receiving unit respectively. When the driving roller rotates between the first state and the second state, the relative surfaces of the transmitting unit and the receiving unit can respectively contact the corresponding wiping member surfaces and produce relative displacement.

[0023] With the above solution, when the driving roller rotates between the first state and the second state, the opposing surfaces of the transmitting unit and the receiving unit can respectively pass through and contact the corresponding wiping members, and then the dust and impurities on the opposing surfaces of the transmitting unit and the receiving unit are wiped away by the relative displacement between the contact surfaces, thereby ensuring the detection sensitivity of the through-beam infrared sensor.

[0024] Preferably, the wiping piece is provided with a bracket detachably connected to the handle.

[0025] With the above solution, the bracket can not only maintain the installation position of the wiping piece, but also facilitate the removal and replacement of the wiping piece, which is more humane.

[0026] Preferably, a slot for engaging the side wall of the receiving slot is provided on the bracket, and a portion of the bracket located outside the handle is fixed to the outer wall of the handle by a locking screw.

[0027] By adopting the above solution, the card slot and the locking screw can not only improve the efficiency of disassembly and assembly of the bracket and the wiper, but also ensure the stability of the bracket after installation.

[0028] Preferably, a sealing plate is provided at the opening of the storage slot and between the two brackets.

[0029] By adopting the above solution, the sealing plate can not only reduce the amount of dust entering the storage slot, but also increase the grip feel of the handle, making it more humane.

[0030] By adopting the above technical solution, the present invention has a significant technical effect: before starting the vacuum cleaner, the user must first hold the handle with their hand. After the trigger unit is triggered, the user's hand will cut off the infrared light emitted by the transmitting unit, preventing the receiving unit from receiving it. Only then can the controller control the operation of the vacuum cleaner. Conversely, if the user's hand does not hold the handle, allowing the receiving unit to receive the infrared light emitted by the transmitting unit, the trigger unit is considered to be falsely triggered, and the controller will not control the operation of the vacuum cleaner. This achieves the purpose of preventing the vacuum cleaner from falsely starting, not only saving energy but also extending the service life of the vacuum cleaner. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a schematic diagram of the structure of this embodiment Figure 1 ;

[0032] Figure 2 This is a schematic diagram of the structure of this embodiment Figure 2 ;

[0033] Figure 3 for Figure 2 An enlarged schematic diagram of section A is shown;

[0034] Figure 4 is a system architecture diagram of this embodiment;

[0035] Figure 5 is an exploded view of the driving roller in the first state in this embodiment;

[0036] Figure 6 for Figure 5 An enlarged schematic diagram of portion B is shown;

[0037] Figure 7 This is a schematic structural diagram of the driving roller in the second state in this embodiment;

[0038] Figure 8 for Figure 7 An enlarged schematic diagram of portion C is shown;

[0039] Figure 9 for Figure 5 An enlarged schematic diagram of portion D is shown;

[0040] Figure 10 Schematic diagram of the structure when the wiping member contacts the transmitting unit and the receiving unit in this embodiment;

[0041] Figure 11 for Figure 10 An enlarged schematic diagram of section E is shown.

[0042] The names of the parts indicated by the numerical labels in the above drawings are as follows: 1. Shell; 2. Handle; 3. Trigger unit; 4. Controller; 5. Through-beam infrared sensor; 6. Transmitter unit; 7. Receiving unit; 8. Storage slot; 9. Drive roller; 10. Drive motor; 11. Output shaft; 12. Mounting seat; 13. Protective cover; 14. Wiping piece; 15. Bracket; 16. Slot; 17. Locking screw; 18. Closing plate; 19. Opening. DETAILED DESCRIPTION

[0043] The present invention is further described in detail below with reference to the accompanying drawings and embodiments.

[0044] like Figures 1 to 4 As shown, a handheld vacuum cleaner disclosed in this embodiment includes a shell 1 and a handle 2 arranged at the rear end of the shell 1. A trigger unit 3 is provided on the upper surface of the handle 2, and the trigger unit 3 is a push-type switch button. A controller 4 is coupled to the trigger unit 3, and the controller 4 is a single-chip microcomputer. The power motor of the vacuum cleaner (not shown) is coupled to and controlled by the controller 4. A facing infrared sensor 5 is provided on the lower surface of the handle 2. The facing infrared sensor 5 includes a transmitting unit 6 and a receiving unit 7, which are respectively provided at both ends of the handle 2 and are both coupled to the controller 4. The transmitting unit 6 and the receiving unit 7 are arranged opposite to each other. The transmitting unit 6 is used to transmit infrared rays along the length direction of the handle 2, and the receiving unit 7 is used to receive the infrared rays emitted by the transmitting unit 6.

[0045] like Figure 5 and Figure 6 As shown, in order to realize the storage and opening of the beam-type infrared sensor 5, the lower surface of the handle 2 is provided with a long strip storage groove 8 along its length direction. A driving roller 9 is provided in the storage groove 8 along its length direction. The two ends of the driving roller 9 are respectively connected to the two ends of the storage groove 8. The transmitting unit 6 and the receiving unit 7 are respectively provided at the two ends of the outer circumference of the driving roller 9. The side of the handle 2 away from the housing 1 is provided with a driving member for driving the driving roller 9 to rotate circumferentially to the first state or the second state. Specifically, as shown in FIG. Figure 6 As shown, the first state is when the driving roller 9 rotates to the position where the transmitting unit 6 and the receiving unit 7 are outside the storage slot 8. In this state, the infrared sensor 5 is in the on state. Figure 7 and Figure 8As shown, the second state is that the driving roller 9 rotates to the position where the transmitting unit 6 and the receiving unit 7 are facing the bottom of the storage groove 8. In this state, the opposing infrared sensor 5 is in the storage state. In this embodiment, the driving member is a driving motor 10 controlled by the controller 4. The driving motor 10 is fixed to the outside of the handle 2 through a mounting base 12. The mounting base 12 can be fixed to the outer surface of the handle 2 by welding or screws (not shown). In order to improve the protection performance of the driving motor 10 and the aesthetics of the entire vacuum cleaner, a protective cover 13 fixed to the outside of the handle 2 is provided on the outside of the driving motor 10. The protective cover 13 can be fixed to the outer surface of the handle 2 by welding or screws (not shown). In this embodiment, the output shaft 11 of the driving motor 10 is coaxially connected to the driving roller 9. When the trigger unit 3 responds to the external trigger to send a start signal to the controller 4, the controller 4 first controls the driving motor 10 to rotate the driving roller 9 to the first state, and then controls the transmitting unit 6 to transmit infrared rays to the receiving unit 7;

[0046] If the infrared rays emitted by the transmitting unit 6 are blocked by the hand so that the receiving unit 7 cannot receive them, it means that the handle 2 is held, and the controller 4 controls the vacuum cleaner to start normally, so that the user can perform cleaning operations.

[0047] On the contrary, if the receiving unit 7 can receive the infrared rays emitted by the transmitting unit 6, it means that the hand is not holding the handle 2, and the trigger unit 3 is regarded as a false trigger. Then the controller 4 does not control the vacuum cleaner to start, so as to achieve the purpose of preventing false start.

[0048] To control the vacuum cleaner's idle operation duration, when the vacuum cleaner is in operation, if the receiving unit 7 can receive infrared light emitted by the transmitting unit 6, it indicates that the user is not holding the handle 2 and that the vacuum cleaner is in idle operation. At this point, the controller 4 begins to calculate the duration of infrared light reception by the receiving unit 7. When the calculated duration is greater than or equal to a preset duration in the controller 4, the controller 4 controls the vacuum cleaner to shut down to save energy. Simultaneously, the controller 4 controls the drive motor 10 to rotate the drive roller 9 to the second state, thereby retracting the infrared sensor 5 and preventing damage due to prolonged exposure.

[0049] like Figure 9 、 Figure 10 and Figure 11As shown, to maintain the detection sensitivity of the through-beam infrared sensor 5, two wipers 14 are disposed between the inner wall of the storage slot 8 and the drive roller 9. These wipers 14 are preferably made of microfiber cloth and have a coverage area greater than the area of ​​the opposing surfaces of the emitting unit 6 and the receiving unit 7. The two wipers 14 correspond to the sweeping planes of the emitting unit 6 and the receiving unit 7, respectively. When the drive roller 9 rotates between the first and second positions, the opposing surfaces of the emitting unit 6 and the receiving unit 7 come into contact with the corresponding surfaces of the wipers 14, causing relative displacement. This allows the wipers 14 to remove dust and impurities from the opposing surfaces of the emitting unit 6 and the receiving unit 7, thereby improving the detection sensitivity of both.

[0050] like Figure 6 As shown, to facilitate the removal and replacement of the wiper 14, the wiper 14 is provided with a bracket 15 that is detachably connected to the handle 2. The wiper 14 is fixed to the surface of the bracket 15 by glue. Specifically, the bracket 15 is provided with a slot 16 for the side wall of the receiving slot 8 to engage. The portion of the bracket 15 located outside the handle 2 is fixed to the outer wall of the handle 2 by two locking screws 17.

[0051] like Figure 6 As shown, in order to reduce the amount of dust entering the storage slot 8 and improve the grip feel of the handle 2, a sealing plate 18 is provided at the opening 19 of the storage slot 8 and between the two brackets 15. The sealing plate 18 is fixed to the inner side of the opening 19 of the storage slot 8 by welding or glue.

[0052] The specific usage process is as follows:

[0053] To start the vacuum cleaner, first grasp the handle 2 and then press the trigger unit 3 on the handle 2, causing the trigger unit 3 to send a start signal to the controller 4. Upon receiving the start signal, the controller 4 first controls the drive motor 10 to rotate the drive roller 9 to the first position, exposing the infrared sensor 5 outside the handle 2. At this point, the controller 4 controls the transmitting unit 6 to transmit infrared light to the receiving unit 7. If the hand is still holding the handle 2, it will block the infrared light, preventing the receiving unit 7 from receiving it, allowing the controller 4 to control the operation of the vacuum cleaner.

[0054] If the trigger unit 3 is pressed without holding the handle 2, the activated receiving module can receive the infrared rays emitted by the transmitting module, thereby determining that the trigger unit 3 is accidentally touched. At this time, the controller 4 does not control the operation of the vacuum cleaner to achieve the purpose of preventing accidental startup.

[0055] When the user needs to actively turn off the vacuum cleaner, he or she long presses the trigger unit 3 so that the trigger unit 3 sends a shutdown signal to the controller 4. After receiving the shutdown signal, the controller 4 controls the vacuum cleaner to stop, and at the same time controls the drive motor 10 to rotate the drive roller 9 to the second state to complete the storage of the opposing infrared sensor 5.

[0056] When the driving roller 9 rotates between the first state and the second state, the opposing surfaces of the emitting unit 6 and the receiving unit 7 can respectively contact the corresponding surfaces of the wiping member 14 and produce relative displacement, so that the wiping member 14 can wipe off dust and impurities on the opposing surfaces of the emitting unit 6 and the receiving unit 7, thereby improving the detection sensitivity of the opposing infrared sensor 5.

Claims

1. A handheld vacuum cleaner comprising a housing (1) and a handle (2) disposed on the housing (1), characterized in that: A trigger unit (3) is provided on the upper surface of the handle (2), a controller (4) is coupled to the trigger unit (3), and the vacuum cleaner is controlled by the controller (4). A counter-beam infrared sensor (5) is provided on the lower surface of the handle (2), and the counter-beam infrared sensor (5) comprises a transmitting unit (6) and a receiving unit (7) which are respectively provided at two ends of the handle (2) and are both coupled to the controller (4). The transmitting unit (6) and the receiving unit (7) are arranged opposite to each other. The transmitting unit (6) is used to transmit infrared rays along the length direction of the handle (2), and the receiving unit (7) is used to receive the infrared rays emitted by the transmitting unit (6). When the trigger unit (3) responds to an external trigger, it can send a start signal to the controller (4). After receiving the start signal, the controller (4) controls the transmitting unit (6) to transmit infrared rays to the receiving unit (7). If the infrared rays emitted by the transmitting unit (6) are blocked by the hand so that the receiving unit (7) cannot receive them, the controller (4) controls the vacuum cleaner to start; On the contrary, if the receiving unit (7) is able to receive the infrared rays emitted by the transmitting unit (6), the controller (4) does not control the vacuum cleaner to start; A receiving groove (8) is provided on the lower surface of the handle (2) along its length direction, a driving roller (9) is provided in the receiving groove (8) along its length direction, a transmitting unit (6) and a receiving unit (7) are respectively provided at two ends of the outer peripheral surface of the driving roller (9), and a driving member for driving the driving roller (9) to rotate circumferentially to a first state or a second state is provided on the side of the handle (2) away from the shell (1), the first state being that the driving roller (9) rotates to a position where the transmitting unit (6) and the receiving unit (7) are outside the receiving groove (8), and the second state being that the driving roller (9) rotates to a position where the transmitting unit (6) and the receiving unit (7) are toward the bottom of the receiving groove (8); Two wiping members (14) are provided between the inner side wall of the receiving groove (8) and the driving roller (9), and the two wiping members (14) respectively correspond to the sweeping planes of the transmitting unit (6) and the receiving unit (7). When the driving roller (9) rotates between the first state and the second state, the opposing surfaces of the transmitting unit (6) and the receiving unit (7) can respectively contact the surfaces of the corresponding wiping members (14) and generate relative displacement.

2. The handheld vacuum cleaner according to claim 1, characterized in that: The driving member is a driving motor (10) controlled by a controller (4). The output shaft (11) of the driving motor (10) is coaxially connected to the driving roller (9). When the trigger unit (3) responds to an external trigger to send a start signal to the controller (4), the controller (4) first controls the driving motor (10) to rotate the driving roller (9) to a first state, and then controls the transmitting unit (6) to transmit infrared rays to the receiving unit (7). If the infrared rays emitted by the transmitting unit (6) are blocked by the hand so that the receiving unit (7) cannot receive them, the controller (4) controls the vacuum cleaner to start; On the contrary, if the receiving unit (7) is able to receive the infrared rays emitted by the transmitting unit (6), the controller (4) does not control the vacuum cleaner to start.

3. The handheld vacuum cleaner according to claim 2, characterized in that: When the vacuum cleaner is in operation, if the receiving unit (7) is able to receive infrared rays emitted by the transmitting unit (6), the controller (4) starts to calculate the duration of time during which the receiving unit (7) continuously receives the infrared rays. When the calculated duration is greater than or equal to a preset duration built into the controller (4), the controller (4) controls the vacuum cleaner to stop, and simultaneously controls the drive motor (10) to rotate the drive roller (9) to the second state.

4. The handheld vacuum cleaner according to claim 2, characterized in that: The driving motor (10) is fixed to the outside of the handle (2) via a mounting seat (12).

5. The handheld vacuum cleaner according to claim 2, characterized in that: A protective cover (13) is provided outside the driving motor (10) and is fixed to the outside of the handle (2).

6. The handheld vacuum cleaner according to claim 1, characterized in that: The wiping piece (14) is provided with a bracket (15) which is detachably connected to the handle (2).

7. The handheld vacuum cleaner according to claim 6, characterized in that: The bracket (15) is provided with a clamping groove (16) for clamping the side wall of the receiving groove (8), and the part of the bracket (15) located outside the handle (2) is fixed to the outer side wall of the handle (2) by a locking screw (17).

8. The handheld vacuum cleaner according to claim 6, characterized in that: A sealing plate (18) is provided at the opening (19) of the receiving groove (8) and between the two brackets (15).

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